Carrier Streamline Scroll 69Nt20 531 300 Users Manual

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Model 69NT20-531-300

Streamline Scroll

T-309 Rev A

Carrier

Transicold

Container

Refrigeration

Operation

&Service

OPERATION AND SERVICE MANUAL

CONTAINER REFRIGERATION UNIT

MODEL

69NT20-531-300

Streamline Scroll

Carrier Transicold. A member of the United Technologies Corporation family. Stock symbol UTX.

Carrier Transicold Divsion, Carrier Corporation, P.O. Box 4805, Syracuse, N.Y. 13221 U. S. A.

ã2002 CarrierCorporation DPrinted in U. S. A. 07/02

T-309

Safety-1

SAFETY SUMMARY

GENERAL SAFETY NOTICES

The following general safety notices supplement the specific warnings and cautions appearing elsewhere in this

manual. They are recommended precautions that must be understood and applied during operation and maintenance

oftheequipmentcoveredherein.Thegeneralsafetynoticesarepresentedinthefollowingthreesectionslabeled:First

Aid, Operating Precautions and Maintenance Precautions. A listing of the specific warnings and cautions appearing

elsewhere in the manual follows the general safety notices.

FIRST AID

Aninjury,nomatterhowslight,shouldnevergounattended.Alwaysobtainfirstaidormedicalattentionimmediately.

OPERATING PRECAUTIONS

Always wear safety glasses.

Keep hands, clothing and tools clear of the evaporator and condenser fans.

Noworkshouldbeperformedontheunituntilallcircuitbreakers,start-stopswitchesareturnedoff,andpowersupply

is disconnected.

Always work in pairs. Never work on the equipment alone.

In case of severe vibration or unusual noise, stop the unit and investigate.

MAINTENANCE PRECAUTIONS

Beware of unannounced starting of the evaporator and condenser fans. Do not open the condenser fan grille or

evaporator access panels before turning power off, disconnecting and securing the power plug.

Besurepoweristurnedoffbeforeworkingonmotors,controllers,solenoidvalvesandelectricalcontrolswitches.Tag

circuit breaker and power supply to prevent accidental energizing of circuit.

Do not bypass any electrical safety devices, e.g. bridging an overload, or using any sort of jumper wires. Problems

with the system should be diagnosed, and any necessary repairs performed, by qualified service personnel.

Whenperforminganyarcweldingontheunitorcontainer,disconnectallwireharnessconnectorsfromthemodulesin

both control boxes. Do not remove wire harness from the modules unlessyou are grounded to the unit frame with a

static safe wrist strap.

In case of electrical fire, open circuit switch and extinguish with CO2(never use water).

UNIT LABEL IDENTIFICATION

To help identify the label hazards on the unit and explain the level of awareness each one carries, an explanation is

given with the appropriate consequences:

DANGER -- means an immediate hazard which WILL result in severe personal injury or death.

WARNING -- means to warn against hazards or unsafe conditions which COULD result in severe personal injury or

death.

CAUTION -- means to warn against potential hazard or unsafe practice which could result in minor personal injury,

product or property damage.

SPECIFIC WARNING AND CAUTION STATEMENTS

The statements listed below are applicable to the refrigeration unit and appear elsewhere in this manual. These

recommended precautions must be understood and applied during operation and maintenance of the equipment

covered herein. WARNING

Beware of unannounced starting of the evaporator and condenser fans. The unit may cycle the fans

and compressor unexpectedly as control requirements dictate.

WARNING

Do not attempt to removepower plug(s)beforeturning OFF start-stop switch (ST), unit circuitbreak-

er(s) and external power source.

WARNING

Make sure the power plugs are clean and dry before connecting to any power receptacle.

Safety-2

T-309

WARNING

Make sure thatthe unit circuit breaker(s) (CB-1 & CB-2) and the START-STOP switch (ST) are in the

“O” (OFF) position before connecting to any electrical power source.

WARNING

Never use air for leak testing. It has been determined that pressurized, mixtures of refrigerant and air

can undergo combustion when exposed to an ignition source.

WARNING

Make sure power to the unit is OFF and power plug disconnected before replacing the compressor.

WARNING

Before disassembly of the compressor make sure to relieve the internal pressure very carefully by

slightly loosening the couplings to break the seal.

WARNING

Oakite No. 32 is an acid. Be sure that the acid is slowly added to the water. DO NOT PUT WATER

INTO THE ACID -- this will cause spattering and excessive heat.

WARNING

Wear rubber gloves and wash the solution from the skin immediately if accidental contact occurs. Do

not allow the solution to splash onto concrete.

WARNING

Always turn OFFthe unitcircuit breakers (CB-1 & CB-2) and disconnect main power supplybefore

working on moving parts.

WARNING

Make sure power to the unit is OFF and power plug disconnected before removing capacitor(s).

WARNING

With power OFF discharge the capacitor before disconnecting the circuit wiring.

WARNING

Do not use a nitrogen cylinder without a pressure regulator. Do not use oxygen in or near a refrigera-

tion system as an explosion may occur.

WARNING

Do not open the condenser fan grille before turning power OFF and disconnecting power plug.

WARNING

The Unit Power Plug Must Be Disconnected To Remove Power From Circuit Breaker Cb1

CAUTION

Donotremovewireharnesses fromcontrollermodulesunlessyouaregroundedtotheunitframewith

a static safe wrist strap.

CAUTION

Unplugallcontrollermodulewireharnessconnectorsbeforeperformingarcweldingonanypartofthe

container.

CAUTION

When condenser water flow is below 11 lpm (3 gpm) or when water-cooled operation is not in use, the

CFS switch MUST be set to position ”1” or the unit will not operate properly.

CAUTION

Pre-trip inspection should not be performed with critical temperature cargoes in the container.

T-309

Safety-3

CAUTION

When Pre-Trip key is pressed, economy, dehumidification and bulb modewill bedeactivated. Atthe

completion of Pre-Trip activity, economy, dehumidification and bulb mode must be reactivated.

CAUTION

When a failure occurs during automatic testing the unit will suspend operationawaiting operatorin-

tervention.

CAUTION

When Pre--Trip test Auto 2 runs to completion without being interrupted, the unit will terminate pre-

trip and display“Auto2”“end.”Theunitwillsuspendoperationuntil theuserdepresses theENTER

key!

CAUTION

Toprevent trappingliquid refrigerant inthemanifold gaugesetbe suresetis broughtto suctionpres-

sure before disconnecting.

CAUTION

Thescroll compressorachieves lowsuction pressurevery quickly. Do not use the compressor toevacu-

ate the system below zero psig. Never operate the compressor with the suction or discharge service

valves closed (frontseated). Internaldamage willresult fromoperating thecompressor ina deep vacu-

um.

CAUTION

Use only Carrier Transicold approved Polyol Ester Oil (POE) -- Mobil ST32 compressor oil with

R-134a.Buyinquantitiesofonequartorsmaller.Whenusingthishygroscopicoil,immediatelyreseal.

Do not leave container of oil open or contamination will occur.

CAUTION

Takenecessarysteps(placeplywoodovercoiloruseslingonmotor)topreventmotorfrom fallinginto

condenser coil.

CAUTION

DONOTdisassemblepistonfromNEWsuctionmodulatingvalvepowerheadassembly.Doingsomay

result in damage to piston.

CAUTION

The unit must be OFF whenever a programming card is inserted or removed from the controller pro-

gramming port.

CAUTION

Do not allow moisture to enter wire splice area as this may affect the sensor resistance.

iT309

TABLE OF CONTENTS

PARAGRAPH NUMBER Page

GENERAL SAFETY NOTICES Safety-1.....................................................

FIRST AID Safety-1......................................................................

OPERATING PRECAUTIONS Safety-1......................................................

MAINTENANCE PRECAUTIONS Safety-1..................................................

UNIT LABEL IDENTIFICATION Safety-1...................................................

SPECIFIC WARNING AND CAUTION STATEMENTS Safety-1.................................

INTRODUCTION 1-1..............................................................................

1.1 INTRODUCTION 1-1..............................................................

1.2 CONFIGURATION IDENTIFICATION 1-1.............................................

1.3 OPTION DESCRIPTIONS 1-1.......................................................

1.3.1 Battery 1-1....................................................................

1.3.2 Dehumidification 1-1............................................................

1.3.3 Control Box 1-1................................................................

1.3.5 Pressure Readout 1-1............................................................

1.3.6 Interrogator 1-1................................................................

1.3.7 Remote Monitoring 1-1..........................................................

1.3.8 Communications 1-1............................................................

1.3.9 Compressor 1-1................................................................

1.3.10 Back Panels 1-1................................................................

1.3.11 460 Volt Cable 1-2.............................................................

1.3.12 Cable Restraint 1-2..............................................................

1.3.13 Upper Air (Fresh Air Make Up) 1-2................................................

1.3.14 Evaporator 1-2.................................................................

1.3.15 Evaporator Fan Operation 1-2.....................................................

1.3.16 Labels 1-2.....................................................................

1.3.17 Plate Set 1-2...................................................................

1.3.18 Controller 1-2..................................................................

1.3.19 Stepper Drive 1-2...............................................................

1.3.20 Condenser Grille 1-2............................................................

DESCRIPTION 2-1...............................................................................

2.1 GENERAL DESCRIPTION 2-1......................................................

2.1.1 Refrigeration Unit -- Front Section 2-1..............................................

2.1.2 Fresh Air Makeup Vent 2-1.......................................................

2.1.3 Evaporator Section 2-2...........................................................

2.1.4 Compressor Section 2-3..........................................................

2.1.5 Air Cooled Condenser Section 2-4.................................................

2.1.6 Control Box Section 2-5.........................................................

2.1.7 Communications Interface Module 2-5..............................................

2.2 REFRIGERATION SYSTEM DATA 2-6...............................................

2.3 ELECTRICAL DATA 2-7...........................................................

2.4 SAFETY AND PROTECTIVE DEVICES 2-8...........................................

2.5 REFRIGERATION CIRCUIT 2-9.....................................................

T309

TABLE OF CONTENTS (cont)

2.5.1 Standard Operation 2-9..........................................................

2.5.2 Economized Operation 2-9.........................................................

2.5.3 Unloaded Operation 2-9...........................................................

MICROPROCESSOR 3-1..........................................................................

3.1 TEMPERATURE CONTROL MICROPROCESSOR SYSTEM 3-1..........................

3.1.1 Key Pad 3-2...................................................................

3.1.2 Display Module 3-2.............................................................

3.1.3 Controller 3-3..................................................................

3.2 CONTROLLER SOFTWARE 3-3.....................................................

3.2.1 Configuration Software (Configuration Variables) 3-3..................................

3.2.2 Operational Software (Function codes) 3-4...........................................

3.3 MODES OF OPERATION 3-4.......................................................

3.3.1 Temperature Control -- Perishable Mode 3-4..........................................

3.3.2 Defrost Interval 3-4.............................................................

3.3.3 Failure Action 3-4..............................................................

3.3.4 Generator Protection 3-4.........................................................

3.3.5 Compressor High Temperature, Low Pressure Protection. 3-4............................

3.3.6 Perishable Mode -- Conventional 3-4................................................

3.3.7 Perishable Mode -- Economy 3-5...................................................

3.3.8 Perishable Mode -- Dehumidification 3-5............................................

3.3.9 Perishable, Dehumidification -- Bulb Mode 3-5.......................................

3.3.10 Temperature Control -- Frozen Mode 3-6.............................................

3.3.11 Frozen Mode -- Conventional 3-6..................................................

3.4 CONTROLLER ALARMS 3-6.......................................................

3.5. UNIT PRE-TRIP DIAGNOSTICS 3-7.................................................

3.6 DataCORDER 3-7.................................................................

3.6.1 Description 3-7.................................................................

3.6.2 DataCORDER Software 3-7......................................................

3.6.3 Sensor Configuration (dCF02) 3-8.................................................

3.6.4 Logging Interval (dCF03) 3-10.....................................................

3.6.5 Thermistor Format (dCF04) 3-10...................................................

3.6.6 Sampling Type (dCF05 & dCF06) 3-10..............................................

3.6.7 Alarm Configuration (dCF07 -- dCF10) 3-10..........................................

3.6.8 DataCORDER Power-Up 3-10.....................................................

3.6.9 Pre-Trip Data Recording 3-10......................................................

3.6.10 DataCORDER Communications 3-10................................................

3.6.11 USDA Cold Treatment 3-11.......................................................

3.6.12 USDA Cold Treatment Procedure 3-11...............................................

3.6.13 DataCORDER Alarms 3-12........................................................

3.6.14 ISO Trip Header 3-12............................................................

iii T309

TABLE OF CONTENTS (cont)

OPERATION 4-1.................................................................................

4.1 INSPECTION (Before Starting) 4-1...................................................

4.2 CONNECT POWER 4-1............................................................

4.2.1 Connection To 380/460 vac Power 4-1..............................................

4.3 ADJUST FRESH AIR MAKEUP VENT 4-1............................................

4.3.1 Upper Fresh Air Makeup Vent 4-1..................................................

4.4 CONNECT REMOTE MONITORING

RECEPTACLE 4-2......................................................................

4.5 STARTING AND STOPPING INSTRUCTIONS 4-2......................................

4.5.1 Starting the Unit 4-2.............................................................

4.5.2 Stopping the Unit 4-2............................................................

4.6 START--UP INSPECTION 4-2.......................................................

4.6.1 Physical Inspection 4-2..........................................................

4.6.2 Check Controller Function Codes 4-2...............................................

4.6.3 Complete Inspection 4-2.........................................................

4.7 PRE-TRIP DIAGNOSIS 4-2.........................................................

4.8 OBSERVE UNIT OPERATION 4-3...................................................

4.8.1 Probe Check 4-3................................................................

4.9 SEQUENCE OF OPERATION 4-4......................................................

4.9.1 Sequence Of operation -- Compressor Phase Sequence 4-5................................

4.9.2 Sequence Of Operation -- Perishable Mode Cooling 4-5..................................

4.9.3 Sequence Of Operation --

Perishable Mode Heating 4-6...........................................................

4.9.4 Sequence Of operation -- Frozen Mode Cooling 4-6.....................................

4.9.5 Sequence Of Operation -- Defrost 4-6...............................................

TROUBLESHOOTING 5-1.........................................................................

5.1 UNIT WILL NOT START OR STARTS THEN STOPS 5-1................................

5.2 UNIT OPERATES LONG OR CONTINUOUSLY IN COOLING 5-1.........................

5.3 UNIT RUNS BUT HAS INSUFFICIENT COOLING 5-2..................................

5.4 UNIT WILL NOT HEAT OR HAS INSUFFICIENT HEATING 5-2..........................

5.5 UNIT WILL NOT TERMINATE HEATING 5-2.........................................

5.6 UNIT WILL NOT DEFROST PROPERLY 5-2..........................................

5.7 ABNORMAL PRESSURES (COOLING) 5-3...........................................

5.8 ABNORMAL NOISE OR VIBRATIONS 5-3............................................

5.9 CONTROLLER MALFUNCTION 5-4.................................................

5.10 NO EVAPORATOR AIR FLOW OR RESTRICTED AIR FLOW 5-4.........................

5.11 THERMOSTATIC EXPANSION VALVE MALFUNCTION 5-4.............................

5.12 AUTOTRANSFORMER MALFUNCTION 5-4..........................................

5.13 WATER-COOLED CONDENSER OR WATER PRESSURE SWITCH 5-4....................

5.14 COMPRESSOR OPERATING IN REVERSE 5-5........................................

5.15 ABNORMAL TEMPERATURES 5-5..................................................

5.16 ABNORMAL CURRENTS 5-5.......................................................

T309

TABLE OF CONTENTS (cont)

SERVICE 6-1....................................................................................

6.1 SECTION LAYOUT 6-1............................................................

6.2 SERVICE VALVES 6-1.............................................................

6.3. MANIFOLD GAUGE SET 6-1.......................................................

6.4 PUMPING THE UNIT DOWN 6-2....................................................

6.5 REFRIGERANT LEAK CHECKING 6-3...............................................

6.6 EVACUATION AND DEHYDRATION 6-3.............................................

6.6.1 General 6-3....................................................................

6.6.2 Preparation 6-3.................................................................

6.6.3 Procedure - Complete system 6-3..................................................

6.6.4 Procedure - Partial System 6-4.....................................................

6.7 REFRIGERANT CHARGE 6-5.......................................................

6.7.1 Checking the Refrigerant Charge 6-5................................................

6.7.2 Adding Refrigerant to System (Full Charge) 6-5.......................................

6.7.3 Adding Refrigerant to System (Partial Charge) 6-5.....................................

6.8 COMPRESSOR -- Model RSH105 6-5.................................................

6.8.1 Removal and Replacement of Compressor 6-5........................................

6.9 COMPRESSOR OIL LEVEL 6-7.....................................................

6.10 HIGH PRESSURE SWITCH 6-7......................................................

6.10.1 Replacing High Pressure Switch 6-7................................................

6.10.2 Checking High Pressure Switch 6-8................................................

6.11 CONDENSER COIL 6-8............................................................

6.12 CONDENSER FAN AND MOTOR ASSEMBLY 6-8.....................................

6.13 FILTER-DRIER 6-8................................................................

6.14 EXPANSION VALVES 6-9..........................................................

6.14.1 Checking Superheat. 6-9.........................................................

6.14.2 Valve Replacement 6-9..........................................................

6.15 EVAPORATOR COIL AND HEATER

ASSEMBLY 6-10........................................................................

6.15.1 Evaporator Coil Replacement 6-10..................................................

6.15.2 Evaporator Heater Replacement 6-10................................................

6.16 ECONOMIZER, UNLOADER, LIQUID INJECTION AND OIL RETURN SOLENOID VALVE 6-11

6.17 EVAPORATOR FAN AND MOTOR ASSEMBLY 6-11....................................

6.17.1 Replacing The Evaporator Fan Assembly 6-12.........................................

6.18 EVAPORATOR FAN MOTOR CAPACITORS 6-12.......................................

6.18.1 When To Check For A Defective Capacitor 6-12.......................................

6.18.2 Removing The Capacitor 6-12......................................................

6.18.3 Checking The Capacitor 6-12......................................................

6.19 VALVE OVERRIDE CONTROLS 6-13.................................................

6.20 SUCTION MODULATION VALVE 6-13................................................

6.20.1 Precheck Procedure 6-14..........................................................

6.20.2 Checking The Stepper valve 6-14...................................................

6.21 CONTROLLER AND EXPANSION MODULE 6-14......................................

vT309

6.21.1 Handling Modules 6-14...........................................................

6.21.2 Controller Trouble-Shooting 6-15...................................................

6.21.3 Controller Programming Procedure 6-15..............................................

6.21.4 Removing and Installing a Module 6-16..............................................

6.22 TEMPERATURE SENSOR SERVICE 6-16..............................................

6.22.1 Sensor Checkout Procedure 6-16....................................................

6.22.2 Sensor Replacement 6-17..........................................................

6.22.3 Sensor Re--Installation 6-18........................................................

6.23 MAINTENANCE OF PAINTED SURFACES 6-18........................................

6.24 COMPOSITE CONTROL BOX REPAIRS 6-18...........................................

6.24.1 Introduction 6-18................................................................

6.24.2 Cracks 6-19....................................................................

6.24.3 Chips And Holes 6-19............................................................

6.24.4 Inserts 6-19.....................................................................

6.24.5 Door Hinge Inserts 6-19...........................................................

6.25 COMMUNICATIONS INTERFACE MODULE INSTALLATION 6-22........................

ELECTRICAL WIRING SCHEMATIC 7-1............................................................

7.1 INTRODUCTION 7-1..............................................................

T309

LIST OF ILLUSTRATIONS

FIGURE NUMBER Page

Figure 2-1 Refrigeration Unit -- Front Section 2-1...............................................

Figure 2-2 Evaporator Section 2-2............................................................

Figure 2-3 Compressor Section 2-3...........................................................

Figure 2-4 Condenser Section 2-4............................................................

Figure 2-5 Control Box Section 2-5...........................................................

Figure 2-6 Refrigeration Circuit Schematic -- Standard Operation 2-10................................

Figure 2-7 Refrigeration Circuit Schematic -- Economized Operation 2-11.............................

Figure 2-8 Refrigeration Circuit Schematic -- Unloaded Operation 2-11...............................

Figure 3- 1 Temperature Control System 3-1...................................................

Figure 3- 2 Key Pad 3-2....................................................................

Figure 3- 3 Display Module 3-2..............................................................

Figure 3- 4 Control and Expansion Modules 3-3.................................................

Figure 3- 5 Standard Configuration Download Report 3-9.........................................

Figure 3- 6 Data Reader 3-11.................................................................

Figure 4-1 Make Up Air Flow Chart 4-1.......................................................

Figure 4-2 Controller Operation -- Perishable Mode 4-4...........................................

Figure 4-3 Controller Operation -- Frozen Mode 4-5..............................................

Figure 4-4 Perishable Mode 4-5..............................................................

Figure 4-5 Perishable Mode Heating 4-6.......................................................

Figure 4-6 Frozen Mode 4-6................................................................

Figure 4-7 Defrost 4-7.....................................................................

Figure 6-1 Service Valve 6-1................................................................

Figure 6-2 Suction Service Valve 6-1.........................................................

Figure 6-3 Manifold Gauge Set 6-1...........................................................

Figure 6-4 R-134a Manifold Gauge/Hose Set 6-2................................................

Figure 6-5. Refrigeration System Service Connections 6-3.........................................

Figure 6-6. Compressor Service Connections 6-4................................................

Figure 6-7 Compressor Upper Mounting 6-6....................................................

Figure 6-8 Compressor Lower Mounting 6-6...................................................

Figure 6-9 High Pressure Switch Testing 6-8...................................................

Figure 6-10 Thermostatic Expansion Valve Bulb 6-9.............................................

Figure 6-11 Evaporator Expansion Valve 6-9...................................................

Figure 6-12 Hermetic Thermostatic Expansion Valve Brazing Procedure 6-10..........................

Figure 6-13 Economizer Expansion Valve 6-10..................................................

Figure 6-14. Unloader Solenoid Valve 6-11.....................................................

Figure 6-15. Oil Return Solenoid Valve (ORV), Economizer Solenoid Valve (ESV),

Liquid Injection Solenoid Valve (LIV) 6-11...........................................

Figure 6-16. Evaporator Fan Assembly 6-12.....................................................

Figure 6-17 Suction Modulation Valve (SMV) 6-13...............................................

Figure 6-18 Controller Section of the Control Box 6-15............................................

Figure 6-19 Sensor Types 6-16...............................................................

Figure 6-20 Typical Sensor and Cable Splice 6-17................................................

Figure 6-21 Supply Sensor Positioning 6-18.....................................................

vii T309

LIST OF ILLUSTRATIONS

FIGURE NUMBER Page

Figure 6-22 Return Sensor Positioning 6-18.....................................................

Figure 6-23 Door Hinge Repair 6-19...........................................................

Figure 6-24. Insert Location 6-21.............................................................

Figure 6-25. Communications Interface Installation 6-22...........................................

Figure 7-1 LEGEND 7-1...................................................................

Figure 7-2 SCHEMATIC DIAGRAM 7-2......................................................

Figure 7-3 WIRING DIAGRAM 7-3.........................................................

LIST OF TABLES

TABLE NUMBER Page

Table 2-1 Safety and Protective Devices 2-8.....................................................

Table 3-1 Key Pad Function 3-2..............................................................

Table 3-2 DataCORDER Configuration Variables 3-8.............................................

Table 3-3 DataCORDER Standard Configurations 3-8.............................................

Table 3-4 Controller Configuration Variables 3-13.................................................

Table 3-5 Controller Function Codes 3-14.......................................................

Table 3-6 Controller Alarm Indications 3-17.....................................................

Table 3-7 Controller Pre-Trip Test Codes 3-21....................................................

Table 3-8 DataCORDER Function Code Assignments 3-25..........................................

Table 3-9 DataCORDER Pre-Trip Result Records 3-26.............................................

Table 3-10 DataCORDER Alarm Indications 3-27.................................................

Table 6-1 Compressor Kit 6-6................................................................

Table 6-2 Sensor Temperature/Resistance Chart (+/--.002%) 6-17.....................................

Table 6-3 Crack, Chip & Hole Repair Kit 6-20....................................................

Table 6-4 Insert Repair Kit 6-20...............................................................

Table 6-5 Drill Information 6-20...............................................................

Table 6-6 Recommended Bolt Torque Values 6-22.................................................

Table 6-7 R-134a Temperature - Pressure Chart 6-23...............................................

1-1 T-309

SECTION 1

INTRODUCTION

1.1 INTRODUCTION

The Carrier Transicold model 69NT20--531-300 units

are of lightweight aluminum frame construction,

designedtofitinthefrontofacontainerandserveasthe

container front wall.

They are one piece, self-contained, all electric units

which are fitted with cooling and heating systems to

provide precise temperature control.

The units are supplied with a complete charge of

refrigerant R-134a and compressor lubricating oil and

are ready for operation upon installation. Forklift

pockets are provided for unit installation and removal.

The base unit operates on nominal 380/460 volt, 3

phase, 50/60 hertz power. An optional autotransformer

maybefittedtoallowoperationonnominal190/230,3

phase, 50/60hertzpower. Power forthe control system

is provided by a transformer which steps the supply

power down to 18 and 24 volts, single phase.

The controller is a Carrier Transicold Micro-Link 2i

microprocessor. The controller will operate

automatically to select cooling, holding or heating as

required to maintain the desired set point temperature

within very close limits.

The controller is fitted with a keypad and display for

viewing orchanging operatingparameters. Thedisplay

isalsoequippedwithlightstoindicatevariousmodesof

operation.

1.2 CONFIGURATION IDENTIFICATION

Unit identification information is provided on a model

plate located to the left of the economizer. The plate

provides the unit model number and the unit parts

identification number (PID). The model number

identifies the overall unit configuration while the PID

provides information on specific optional equipment,

factory provision to allow for field installation of

optional equipment and differences in detailed parts.

Configuration identification for the models covered

herein areprovided in the Carrier Transicold Container

Unit Matrixmanual, publicationT--300. Printedcopies

of the T--300 may be obtained from Carrier Transicold.

Also,aweeklyupdatedcopymaybefoundattheCarrier

Web site, www.carrier.refrigeration.com.

1.3 OPTION DESCRIPTIONS

Variousoptionsmaybefactoryorfieldfittedto thebase

unit. Brief descriptions of the options are provided in

the following subparagraphs.

1.3.1 Battery

The controller may be fitted with standard replaceable

batteries or a rechargeable battery pack.

1.3.2 Dehumidification

The unit may be fitted with a humidity sensor. This

sensor allows setting of a humidity set point in the

controller. In the dehumidification mode the controller

willoperatetoreduceinternalcontainermoisturelevel.

1.3.3 Control Box

The control box is constructed of composite material

and may be fitted with a lockable door.

1.3.4 Temperature Readout

The unit may be fitted with suction and discharge

temperature sensors. The sensor readings may be

viewed on the controller display.

1.3.5 Pressure Readout

Theunitmaybefittedwithfactoryinstalledsuctionand

discharge pressure gauges. The unit is fitted with

suctionanddischargetransducers.Thereadingsmaybe

viewed on the controller display.

1.3.6 Interrogator

UnitsthatusetheDataCORDERfunctionarefittedwith

interrogator receptacles for connection of equipment to

download the recorded data. Two receptacles may be

fitted, one accessible from the front of the unit and the

other mounted inside the container (with the USDA

receptacles).

1.3.7 Remote Monitoring

The unit may be fitted with a remote monitoring

receptacle. This item allows connection of remote

indicators for COOL, DEFROST and IN RANGE.

1.3.8 Communications

Theunitmaybefittedwithacommunicationsinterface

module. The communications interface module is a

slave module which allows communication with a

master central monitoring station. The module will

respond to communication and return information over

the main power line. Refer to the ship master system

technical manual for further information.

1.3.9 Compressor

The unit is fitted with a scroll compressor.

1.3.10 Back Panels

Back panel designs that may be fitted include panels of

aluminumand stainlesssteel. Panels maybe fittedwith

access doors and/or hinge mounting.

1-2

T-309

1.3.11 460 Volt Cable

Various power cable and plug designs are available for

the main 460 volt supply. The plug options tailor the

cables to each customers requirements.

1.3.12 Cable Restraint

Various designs are available for storage of the power

cables. These options are variations of the compressor

section front cover.

1.3.13 Upper Air (Fresh Air Make Up)

The unit may be fitted with an upper fresh air makeup

assembly. These assemblies are supplied in two

designs, the standard design and themicro design. The

openings may also be fitted with screens.

1.3.14 Evaporator

Theunit is fitted with an evaporator coiland ahermetic

thermal expansion valve.

1.3.15 Evaporator Fan Operation

The units are fitted with Normal Evaporator Fan

Operation, opening of an evaporator fan internal

protector will shut down the unit.

1.3.16 Labels

Operating Instruction and Function Code listing labels

will differ depending on the options installed. For

example, additional operating instructions arerequired

to describe start--up of a unit equipped with an

autotransformer. Where the labels are available with

additional languages, they are listed in the parts list.

1.3.17 Plate Set

Each unit is equipped with a tethered set of wiring

schematic and wiring diagram plates.

The plate sets are ordered using a seven digit basepart

numberandatwodigitdashnumber. (See UnitMatrix

Manual, T-300)

1.3.18 Controller

Replacement controllers may be ordered as a universal

un--configured controller (without configuration

software) or configured.

1.3.19 Stepper Drive

All the units covered by this manual have suction

modulatingvalveswhichacttocontrolsystemcapacity.

Unitsindicatedasbeingfittedwith“stepperdrive”have

digital control motors fitted to the suction modulating

valve to open and close the valve in steps as required.

1.3.20 Condenser Grille

Two styles of condenser grilles are available, direct

bolted grilles and hinged grilles.

T-309

2-1

SECTION 2

DESCRIPTION

2.1 GENERAL DESCRIPTION

2.1.1 Refrigeration Unit -- Front Section

The unit is designed so that the majority of the

components are accessible from the front, see

Figure 2-1.Theupperaccesspanelsallowentryintothe

evaporator section, and the center access panel allows

access to the evaporator expansion valve, unloader

valve, suction modulation valve and evaporator coil

heaters.Theunitmodelnumber,serialnumberandparts

identificationnumbercanbefoundontheserialplateto

the left of the economizer.

2.1.2 Fresh Air Makeup Vent

Thefunctionoftheupperorlowermakeupairventisto

provide ventilation for commodities that require fresh

air circulation.

1. Access Panel (Evap. Fan #1)

2. Access Panel (Heaters, Suction Modulating

Valve, Unloader Valve & Evaporator

Expansion Valve)

3. Fork Lift Pockets

4. Control Box

5. Compressor

6. Receiver or Water Cooled Condenser

7. Economizer

8. Unit Serial Number, Model Number and

Parts Identification Number (PID) Plate

9. Power Cables and Plug

10. Condenser Fan

11. Interrogator Connector (Front left)

12. Blank Cover (Temperature Recorder Location)

13. Blank Cover (Lower Fresh Air Makeup Vent

Location)

14. Upper Fresh Air Makeup Vent

15. Access Panel (Evap. Fan #2)

16. Compressor Protection Panel (cutaway view)

Figure 2-1 Refrigeration Unit -- Front Section

2-2T-309

2.1.3 Evaporator Section

The evaporator section (Figure 2-2) contains the return

recorder sensor, return temperature sensor, evaporator

expansion valve, unloader valve, suction modulation

valve, dual-speed evaporator fans (EM1 and EM2),

evaporator coil and heater, defrost heaters, defrost

temperature sensor, heat termination thermostat and

suction temperature sensor.

The evaporator fans circulate air through the container

by pulling it in the top of the unit, directing it through

the evaporator coil, where it is heated or cooled, and

discharging it at the bottom.

Theevaporatorcomponentsareaccessiblebyremoving

the upper rear panel (as shown in the illustration) orby

removing the front access panels.

11 12

10 17 6

1. Evaporator Fan Motor #1

2. Return Recorder/Temperature Sensor

3. Humidity Sensor

4. Evaporator Fan Motor #2

5. Defrost Temperature Sensor

6. Heater Termination Thermostat

7. Evaporator Coil

8. Evaporator Coil Heaters

9. Evaporator Expansion Valve Bulb

10. Evaporator Expansion Valve

11. Low Side Access Valve

12. Suction Modulating Valve

13. Suction Temperature Sensor

14. To Compressor

15. From Coil

16. To Coil

17. Unloader Solenoid Valve

Figure 2-2 Evaporator Section

T-309

2-3

2.1.4 Compressor Section

The compressor section includes the compressor (with

high pressure switch) and the oil separator.

This section also contains the oil return solenoid,

compressor power plug, the discharge pressure

transducer, discharge temperature sensor and the

suction pressure transducers.

The supply temperature sensor, supply recorder sensor

and ambient sensor are located at the left side of the

compressor.

910

17 18 19

Discharge

Connection

(Hidden)

Economizer

Connection

Suction

Connection

Oil Return

Connection

1. Compressor Guard

2. Supply Temperature/Supply Recorder Sensor

Assembly

3. Ambient Sensor

4. Supply Air Thermometer Port (location)

5. Oil Drain

6. Compressor

7. Compressor Sight Glass

8 Compressor Power Plug

9. Discharge Service Valve

10. High Pressure Switch

11. Access Valve

12. Economizer Service Valve

13. Suction Service Valve

14. Discharge Temperature Sensor

15. Oil Return Service Valve

16. Discharge Pressure Transducer

17. Oil Return Solenoid Valve

18. Oil Separator

19. From Economizer

20. To Condenser

21. From Suction Modulating Valve

22. Suction Strainer

23. Suction Pressure Transducer

Figure 2-3 Compressor Section

2-4T-309

2.1.5 Air Cooled Condenser Section

The air cooled condenser section (Figure 2-4) consists

of the condenser fan, condenser coil, receiver, sight

glass/moisture indicator, liquid line service valve,

filter-drier and fusible plug.

Thecondenserfanpulls airinthebottom ofthecoiland

it is discharged horizontally out through the condenser

fan grille.

This section also contains the economizer, economizer

solenoid valve, economizer expansion valve and the

liquid injection solenoid valve.

567

811

10 13

1. Grille and Venturi Assembly

2. Condenser Fan

3. Key

4. Condenser Fan Motor

5. Condenser Coil

6. Condenser Motor Mounting Bracket

7. Condenser Coil Cover

8. Economizer

9. To Evaporator Expansion Valve

10. Liquid Injection Solenoid Valve

11. From Condenser

12. To Condenser

13. To Compressor Economizer Connection

14. To Unloader Solenoid Valve

15. From Compressor Discharge

16. Discharge Pressure Transducer

17. Oil Separator

18. To Oil Return Solenoid

19. Receiver

20. Sight Glass/Moisture Indicator

21. Sight Glass

22. Fusible Plug

23. Access Valve

24. Liquid Line Service Valve

25. Filter-Drier

26. Economizer Expansion Valve

27. Economizer Solenoid Valve

Figure 2-4 Condenser Section

T-309

2-5

2.1.6 Control Box Section

The control box (Figure 2-5) includes the manual

operationswitches;circuitbreaker(CB-1);compressor,

fan and heater contactors; control power transformer;

fuses; key pad;display module; current sensormodule;

controller module expansion module and the

communications interface module.

2.1.7 Communications Interface Module

The communications interface module is a slave

module which allow communication with a master

central monitoring station. The module will respondto

communication and return information over the main

powerline.Refertothemastersystemtechnicalmanual

for further information.

1920 151718

12 3 4 5 6 7

10 911

121316

1. Compressor Phase A Contactor

2. Compressor Phase B Contactor

3. Heater Contactor

4. Display Module

5. Communications Interface Module

6. Controller/DataCORDER Module (Controller)

7. Expansion Module

8. Key Pad

9. Start-Stop Switch

10. Remote Monitoring Receptacle

11. Manual Defrost Switch

12. Condenser Fan Switch

13. Controller Battery Pack

14. Interrogator Connector (Box Location)

15. Control Transformer

16. Evaporator Fan Contactor - High

17. Evaporator Fan Contactor - Low

18. Condenser Fan Contactor

19. Circuit Breaker -- 460V

20. Current Sensor Module

Figure 2-5 Control Box Section

2-6T-309

2.2 REFRIGERATION SYSTEM DATA

Model RSH105

Weight (Dry) 46.5 kg (103 lb)

Approved Oil Mobil ST32

Assembly Oil Charge 2957 ml (100 ounces)

Oil Sight Glass The oil level range, with the compressor off,

should be between the bottom and one-eighth

level of the sight glass.

b. Evaporator Expansion

Valve Superheat Verify at --18 _C

(0 _F) container box

temperature 4.4to6.7_C(8to12_F)

c. Economizer Expansion

Valve Superheat 4.4 to 11.1 _C(8to20_F)

Opens 54 (¦3) _C = 130 (¦5) _F

eater

erm

nat

ermostat Closes 38 (¦4) _C = 100 (¦7) _F

Cutout 25 (¦1.0) kg/cm@= 350 (¦10) psig

ressure

Cut-In 18 (¦0.7) kg/cm@= 250 (¦10) psig

Unit Configuration Charge Requirements -- R-134a

4--Row Coil

f. Refrigerant Charge Water-Cooled

Condenser 5.33 kg

(11.75 lbs)

Receiver 4.99kg

(11.0 lbs)

Melting point 99 _C = (210 _F)

ug Torque 6.2 to 6.9 mkg (45 to 50 ft-lbs)

h. Sight Glass/Moisture Indicator Torque 8.9 to 9.7 mkg (65 to 70 ft-lbs)

Bursts at 35 ¦5% kg/cm@= (500 ¦5% psig)

upture

sc Torque 6.2 to 6.9 mkg (45 to 50 ft-lbs)

j. Unit Weight Refer to unit model number plate.

Cut-In 0.5 ¦0.2 kg/cm@(7 ¦3psig)

ater

ressure

Cutout 1.6 ¦0.4 kg/cm@(22 ¦5psig)

T-309

2-7

2.3 ELECTRICAL DATA

CB-1 Trips at 29 amps

a. Circuit Breaker CB-2 (50 amp) Trips at 62.5 amps

CB-2 (70 amp) Trips at 87.5 amps

b. Compressor

Motor Full Load Amps (FLA) 13 amps @ 460 vac

380 vac, Single Phase,

50 hz 460 vac, Single Phase,

60 hz

Full Load Amps 1.3 amps 1.6 amps

Motor Horsepower 0.43 hp 0.75 hp

Rotations Per Minute 1425 rpm 1725 rpm

Voltage and Frequency 360 -- 460 vac ¦2.5 hz 400 -- 500 vac ¦2.5 hz

Bearing Lubrication Factory lubricated, additional grease not required.

Rotation Counter-clockwise when viewed from shaft end.

Number of Heaters 4

d. Eva

orator Coil Rating 750 watts +5/--10% each @ 230 vac

Heaters Resistance (cold) 66.8 to 77.2 ohms @ 20 _C(68_F)

Type Sheath

380 vac/50 hz 460 vac/60 hz

Full Load Amps

High Speed 1.6 2.0

Full Load Amps

Low Speed 0.8 1.0

Nominal Horsepower

High Speed 0.70 0.84

Nominal Horsepower

Low Speed 0.09 0.11

Motor(s) Rotations Per Minute

High Speed 2850 rpm 3450 rpm

Rotations Per Minute

Low Speed 1425 rpm 1750 rpm

Voltage and Frequency 360 -- 460 vac ±1.25 hz 400 -- 500 vac ±1.5 hz

Voltage & Frequency us-

ing power autotransformer 180 -- 230 vac ±1.25hz 200 -- 250 vac ±1.5 hz

Bearing Lubrication Factory lubricated, additional grease not required

Rotation CW when viewed from shaft end

Control Circuit 10 amps (F3)

f. Fuses Controller/DataCORDER 5amps(F1&F2)

Expansion Module 10 amps (F4)

2-8T-309

PARAGRAPH 2.3 -- Continued

Orange wire Power

Red wire Output

Brown wire Ground

Input voltage 5vdc

Output voltage 0to3.3vdc

ensor Output voltage readings verses relative humidity (RH) percentage:

30% 0.99 V

50% 1.65 V

70% 2.31 V

90% 2.97 V

2.4 SAFETY AND PROTECTIVE DEVICES

Unit components are protected from damage by safety

and protective devices listed in the following table.

Thesedevicesmonitortheunitoperatingconditionsand

open a set of electrical contacts when an unsafe

condition occurs.

Open safety switchcontacts oneitherorbothofdevices

IP-CP or HPS will shut down the compressor.

Open safety switch contacts on deviceIP-CM will shut

down the condenser fan motor.

Theentirerefrigerationunitwillshutdown ifoneofthe

following safety devices open: (a) Circuit Breaker(s);

(b)Fuse(F3/15A);or(c)EvaporatorFanMotorInternal

Protector(s) -- (IP-EM).

Table 2-1 Safety and Protective Devices

UNSAFE CONDITION DEVICE DEVICE SETTING

Circuit Breaker (CB-1) -- Manual Reset Trips at 29 amps (460 vac)

Excessive current draw Circuit Breaker (CB-2, 50 amp) --Manual Reset Trips at 62.5 amps (230 vac)

Circuit Breaker (CB-2, 70 amp) --Manual Reset Trips at 87.5 amps (230 vac)

Excessive current draw in the

control circuit Fuse (F3) 10 amp rating

Excessive current draw by the

controller Fuse (F1 & F2) 5 amp rating

Excessive current draw by the

expansion module Fuse (F4) 10 amp rating

Excessive condenser fan mo-

tor winding temperature Internal Protector (IP-CM) -- Automatic Reset N/A

Excessive compressor motor

winding temperature Internal Protector (IP-CP) -- Automatic Reset N/A

Excessive evaporator fan mo-

tor(s) winding temperature Internal Protector(s) (IP-EM) -- Automatic Reset N/A

Abnormal pressures/tempera-

tures in the high refrigerant

side

Fusible Plug -- Used on the Receiver

Rupture Disc -- Used on the Water-Cooled Con-

denser

93 _C = (200 _F)

35 kg/cm@= (500 psig)

Abnormally high discharge

pressure High Pressure Switch (HPS) Opens at 25 kg/cm@

(350 psig)

T-309

2-9

2.5 REFRIGERATION CIRCUIT

2.5.1 Standard Operation

Starting at the compressor, (see Figure 2-6, upper

schematic) the suction gas is compressed to a higher

pressure and temperature.

Inthestandardmode,boththeeconomizerandunloader

solenoid valves are closed. The gas flows through the

discharge service valve into the oil separator. In the

separator, oil is removedfrom therefrigerant and stored

forreturntothecompressorwhentheoilreturnsolenoid

valveisopenedbythecontroller.Theoilreturnsolenoid

valveisanormallyopenvalvewhichallowsreturnofoil

during the off cycle.

The refrigerant gas continues into the air-cooled

condenser. When operating with the air-cooled

condenser active, air flowing across the coil fins and

tubes cools the gas to saturation temperature. By

removing latent heat, the gas condenses to a high

pressure/high temperature liquid and flows to the

receiver which stores the additional charge necessary

for low temperature operation.

Whenoperatingwiththewatercooledcondenseractive

(see Figure 2-6, lower schematic), the refrigerant gas

passes through the air cooled condenser and enters the

watercooled condensershell. Thewater flowinginside

thetubing coolsthe gas to saturationtemperatureinthe

same manner as the air passing over the air cooled

condenser. The refrigerant condenses on the outside of

the tubes and exits as a high temperature liquid. The

water cooled condenser also acts as a receiver, storing

excess refrigerant.

The liquid refrigerant continues through the liquid line

service valve, the filter-drier (which keeps refrigerant

clean and dry) and the economizer (which is not active

during standard operation) tothe evaporator expansion

valve. As the liquid refrigerant passes through the

variable orifice of the expansion valve, some of it

vaporizes into a gas (flash gas). Heat is absorbed from

the return air by the balance of the liquid, causing it to

vaporize in the evaporator coil. The vapor then flows

through the suction modulation valve to the

compressor.

Theevaporatorexpansionvalveisactivatedbythebulb

strapped to the suction line near the evaporator outlet.

The valve maintains a constant superheat at the coil

outlet regardless of load conditions.

On systems fitted with a water pressure switch, the

condenser fan will be off when there is sufficient

pressure to open the switch. If water pressure drops

below the switch cut out setting, the condenser fan will

be automatically started. When operating a system

fitted with a condenser fan switch, the condenser fan

willbeoffwhentheswitchisplacedinthe“O”position.

The condenser fan will be on when the switch is placed

in the “I” position.

2.5.2 Economized Operation

Intheeconomizedmodethefrozenrangeandpulldown

capacityoftheunitisincreasedbysubcoolingtheliquid

refrigerant entering the evaporator expansion valve.

Overall efficiency is increased because the gas leaving

the economizer enters the compressor at a higher

pressure, therefore requiring less energy to compress it

to the required condensing conditions.

During economized operation, flow of refrigerant

through the main refrigerant system is identical to the

standard mode. (The unloader solenoid valve is

de--energized [closed] by the controller.)

Liquid refrigerant for use in the economizer circuit is

taken from the main liquid line as it leaves the

filter--drier(seeFigure 2-7).Theflowisactivatedwhen

the controller energizes the economizer solenoidvalve.

The liquid refrigerant flows through the economizer

expansion valve and the economizer internal passages

absorbingheatfromtheliquidrefrigerantflowingtothe

evaporator expansion valve. The resultant “medium”

temperature/pressure gas enters the compressor at the

economizer service valve.

2.5.3 Unloaded Operation

The system will operate in the unloaded mode during

periods of low load, during periods of required

discharge pressure or current limiting, and during

start--up.

During unloaded operation, flow of refrigerant through

the main refrigerant system is identical to the standard

mode. (The economizer solenoid valve is de--energized

[closed] by the controller.)

In the unloaded mode, a portion of the mid--stage

compressed gas is bypassed to decrease compressor

capacity. The flow is activated when the controller

opens the unloader solenoid valve (see Figure 2-7.

Opening of the valve creates a bypass from the

economizerservicevalvethroughtheunloadersolenoid

valve and into the suction line on the outlet side of the

suction pressure modulation valve.

Asloadonthesystemdecreases,thesuctionmodulating

valve decreases flow of refrigerant to the compressor.

This action balances the compressor capacity with the

loadandpreventsoperationwithlowcoiltemperatures.

In this mode of operation, the liquid injection solenoid

valve will open as required to provide sufficient liquid

refrigerant flow into the suction line for cooling of the

compressor motor.

2-10T-309

EVAPORATOR

CONDENSER

TXV

TXV BULB SMV

COMPRESSOR

OIL SEPARATOR

ORV

FILTER

DRIER

RUPTURE DISC

WATER COOLED

CONDENSER

OIL RETURN

SERVICE VALVE

ORV

DPT

CPDS

DISCHARGE

SERVICE

CONNECTION

HPS

ECONOMIZER

SERVICE

CONNECTION

SPT

SUCTION SERVICE

CONNECTION

QUENCH

TXV

BULB

CPSS

STANDARD OPERATION WITH RECEIVER

STANDARD OPERATION WITH WATER COOLED CONDENSER

STS

DPT

CPDS

RECEIVER

FUSIBLE PLUG SIGHT GLASS

MOISTURE INDICATOR

LIQUID LINE

SERVICE

CONNECTION

FILTER

DRIER

ECONOMIZER

TXV

ESV

ECONOMIZER

ECONOMIZER TXV BULB

HPS

OIL RETURN

SERVICE VALVE

DISCHARGE

SERVICE

CONNECTION

SPT

SUCTION SERVICE

CONNECTION

USV

LOW SIDE ACCESS VALVE

DISCHARGE LIQUID SUCTION

ESV

ECONOMIZER

TXV

LIQUID LINE

SERVICE

CONNECTION

SIGHTGLASS/

MOISTURE INDICATOR

ECONOMIZER

SERVICE

CONNECTION

ECONOMIZER

LIV

EVAPORATOR

CONDENSER

TXV

TXV BULB SMV

ECONOMIZER TXV BULB

USV

LOW SIDE ACCESS VALVE

LIV

Figure 2-6 Refrigeration Circuit Schematic -- Standard Operation

T-309

2-11

LIQUID ECONOMIZER PRESSURE

ECONOMIZER

SERVICE

CONNECTION

ESV

ECONOMIZER

TXV

LIQUID LINE

SERVICE CONNECTION

OIL SEPARATOR

RECEIVER

EVAPORATOR

CONDENSER

TXV

TXV BULB SMV

ECONOMIZER TXV BULB

LOW SIDE ACCESS VALVE

LIV

Figure 2-7 Refrigeration Circuit Schematic -- Economized Operation

LIQUID ECONOMIZER PRESSURE

TXV

TXV BULB SMV

SUCTION SERVICE

CONNECTION

USV

SUCTION

OIL SEPARATOR

RECEIVER

ECONOMIZER TXV BULB

LIV

Figure 2-8 Refrigeration Circuit Schematic -- Unloaded Operation

3-1 T-309

SECTION 3

MICROPROCESSOR

3.1 TEMPERATURE CONTROL MICROPRO-

CESSOR SYSTEM

The temperature control Micro-Link 2i microprocessor

system (see Figure 3- 1) consists of a key pad, display

module, the control module & expansion module set

(controller) and interconnecting wiring. The controller

houses the temperature control software and the

DataCORDER Software. The temperature control

software functions to operate the unit components as

required to provide the desired cargo temperature and

humidity. The DataCORDER software functions to

record unit operatingparameters and cargotemperature

parameters for future retrieval. Coverage of the

temperaturecontrolsoftwarebeginswithparagraph3.2.

Coverageof the DataCORDER software is provided in

paragraph 3.6.

The key pad and display module serve to provide user

accessandreadouts forbothofthe controllerfunctions,

temperature control and DataCORDER. The functions

are accessed by key pad selections and viewed on the

displaymodule.Thecomponentsaredesignedtopermit

ease of installation and removal.

DISPLAY

CONTROL MODULE DISPLAY MODULE

KEY PAD

CONFIGURATION

SOFTWARE

CONFIGURATION

VARIABLE

(CnF##)

TEMPERATURE CONTROL SOFTWARE

ALARMS

(AL<70) PRE--TRIP INTERROGATION

CONNECTOR

DATAREADER

Computer Device

With DataLine

Software

DataCORDER SOFTWARE

OPERATIONAL

SOFTWARE

FUNCTION

CODE (Cd)

DISPLAY

CONFIGURATION

SOFTWARE

CONFIGURATION

VARIABLE

(dCF## read only)

ALARMS

(AL>69) DATA

STORAGE

MEMORY

OPERATIONAL

SOFTWARE

FUNCTION

CODE (dC) TO

DISPLAY

(Scrollback)

EXPANSION MODULE

Figure 3- 1 Temperature Control System

3-2T-309

3.1.1 Key Pad

The key pad (Figure 3- 2) is mountedon the right-hand

side of the control box. The key pad consists of eleven

pushbuttonswitchesthatactastheuser’sinterfacewith

the controller. Descriptions of the switch functions are

provided in Table 3-1.

ENTER

BATTERY

POWER

DEFROST

INTERVAL

CODE

SELECT PRE

TRIP

ALARM

LIST

ALT.

MODE

RETURN

SUPPLY _C

Figure 3- 2 Key Pad

COOL HEAT DEFROST IN RANGEALARM SUPPLY RETURN

SETPOINT/Code AIR TEMPERATURE/Data

Figure 3- 3 Display Module

3.1.2 Display Module

The display module (Figure 3- 3) consists of two

backlightedfivedigitLCDdisplaysandsevenindicator

lights. The indicator lights include:

1. Cool -- White LED: Energized when the refrigerant

compressor is energized.

2. Heat--OrangeLED:Energizedtoindicateheaterop-

eration in the heat or defrost mode.

3. Defrost--OrangeLED:Energizedwhentheunitisin

the defrost mode.

4. In-Range -- Green LED: Energized when the con-

trolled temperature probe is within specified toler-

ance of set point.

Table 3-1 Key Pad Function

KEY FUNCTION

Code Select Accesses function codes.

Pre-Trip Displays the pre-trip selection menu. Dis-

continues pre-trip in progress.

Alarm List Displays alarm list and clears the alarm

queue.

Defrost

Interval Displays selected defrost interval.

Enter Confirms a selection or saves a selection

to the controller.

Arrow Up Change or scroll a selection upward Pre-

trip advance or test interruption.

Arrow

Down Change or scroll a selection downward.

Pre-trip repeat backward.

Return/

Supply Displays non-controlling probe tempera-

ture (momentary display).

_C/_F

Displays alternate English/Metric scale

(momentary display). When set to _F,

pressure is displayed in psig and vacuum

in “/hg. “P” appears after the value to in-

dicate psig and “i” appears for inches of

mercury.

When set to _C. pressure readings are in

bars. “b” appears after the value to indi-

cate bars.

Battery

Power Initiate battery backup mode to allow set

point and function code selection if AC

power is not connected.

ALT Mode

This key is pressed to switch the functions

from the temperature software to the Da-

taCORDER Software. The remaining keys

function the same as described above ex-

cept the readings or changes are made to

the DataCORDER programming..

NOTE

The controlling probe in the perishable range

will be the SUPPLY air probe and the control-

ling probe in the frozen range will be the

RETURN air probe.

5. Supply--YellowLED:Energizedwhenthesupplyair

probe is used for control. When this LED is illumi-

nated, the temperature displayed inthe AIR TEMPER-

ATURE display is the reading at the supply air probe.

This LEDwill flash if dehumidification orhumidifi-

cation is enabled.

6. Return--YellowLED:Energizedwhenthereturnair

probe is used for control. When this LED is illumi-

nated, the temperature displayed in the AIR TEM-

PERATUREdisplayisthereadingatthereturnairpro-

be. This LED will flash if dehumidification or

humidification is enabled.

7. Alarm-- RedLED:Energizedwhenthereis anactive

or an inactive shutdown alarm in the alarm queue

3-3 T-309

12 33 3 3 345 67

1333 3 3

1. Mounting Screw

2. Micro-Link 2i Control/DataCORDER Module

3. Connectors

4. Test Points

5. Fuses

6. Control Circuit Power Connection

(Location: In back of controller)

7. Software Programming Port

8. Battery Pack

9. Expansion Module

Figure 3- 4 Control and Expansion Modules

3.1.3 Controller

CAUTION

Do not remove wire harnesses from control-

ler modules unless you are grounded to the

unit frame with a static safe wrist strap.

CAUTION

Unplug all controller module wire harness

connectors before performing arc welding

on any part of the container.

NOTE

Do not attempt to service the controller mod-

ules. Breaking the seal will void the warranty.

The Micro--Link 2i controller is a dual module

microprocessorasshowninFigure 3- 4.Itisfittedwith

test points, harness connectors and a software card

programming port.

3.2 CONTROLLER SOFTWARE

The controller software is a custom designed program

that is subdivided into the Configuration Software and

the Operational Software. The controller software

performs the following functions:

a. Control supply or return air temperature to required

limits, provide modulated refrigeration operation,

economized operation, unloaded operation, electric

heatcontrolanddefrost.Defrostisperformedtoclear

build up of frost and ice and ensure proper air flow

across the coil.

b. Providedefaultindependentreadoutsofsetpointand

supply or return air temperatures.

c. Provideability to read and (if applicable) modify the

Configuration Software Variables, Operating Soft-

ware Function Codes and Alarm Code Indications.

d. ProvideaPre-Tripstep-by-stepcheckoutofrefrigera-

tion unit performance including: proper component

operation, electronicand refrigeration control opera-

tion, heater operation, probe calibration, pressure

limiting and current limiting settings.

e. Provide battery powered ability to access or change

selected codes and set point without AC power con-

nected

f. Providetheabilitytoreprogramthesoftwarethrough

theuseofamemorycard.Thememorycardautomat-

icallydownloadsnewsoftwaretothecontrollerwhen

inserted.

3.2.1 Configuration Software (Configuration Vari-

ables)

The Configuration Software is a variable listing of the

components available for use by the Operational

Software. This software is factory installed in

accordancewiththeequipment fitted and options listed

on the original purchase order. Changes to the

Configuration Software are required only when a new

controller hase been installed or a physical change has

beenmadetotheunitsuchastheadditionorremovalof

an option. A Configuration Variable list is provided in

Table 3-4. Change to the factory installed

Configuration Software is achieved via a configuration

card or communications.

3-4T-309

3.2.2 Operational Software (Function codes)

The Operational Software is the actual operation

programming of the controller which activates or

deactivatescomponentsinaccordancewithcurrentunit

operating conditions and operator selected modes of

operation.

TheprogrammingisdividedintofunctionCodes.Some

of the codes are read only while the remaining codes

may be user configured. The value of the user

configurable codes can be assigned in accordance with

user desired mode of operation. A list of the function

codes is provided in Table 3-5.

To access the function codes, perform the following:

a. Press the CODE SELECT key, then press an arrow

key until the left window displays the desired code

number.

b. The right window will display the value of this item

for five seconds before returning to the normal dis-

play mode.

c. If a longer time is desired, press the ENTER key to

extend the time to 30 seconds.

3.3 MODES OF OPERATION

The Operational Software responds to various inputs.

These inputs come from the temperature and pressure

sensors,thetemperaturesetpoint,thesettingsofthethe

configuration variables and the function code

assignments. The action taken by the Operational

Software will change if any one of the inputs changes.

Overall interaction of the inputs is described as a

“mode” of operation. The modes of operation include,

perishable (chill) mode and frozen mode. Descriptions

of the controller interaction and modes ofoperation are

provided in the following sub paragraphs.

3.3.1 Temperature Control -- Perishable Mode

With configuration variable CnF26 (Heat Lockout

Temperature) set to --10_C the perishable mode of

operation is active with set points at or above --10_C

(+14_F). With the variable set to --5_C, the perishable

mode is active at or above --5_C(+23_F). Refer to

Table 3-4.

When in the perishable mode the controller maintains

the supply air temperature at set point, the SUPPLY

indicatorlightwillbeilluminatedonthedisplaymodule

and the default reading on the display window will be

the supply temperature sensor reading.

When the supply air temperature enters the in-range

temperature tolerance (as selected at function code

Cd30), the in-range light will energize.

3.3.2 Defrost Interval

Function code Cd27 may be operator set to initiate

defrostatintervalsof3,6,9, 12or24hours.Itmayalso

be set to OFF (no defrost). The factory default is 12

hours. (Refer to Table 3-5).

3.3.3 Failure Action

Function code Cd29 may be operator set to allow

continued operation in the event the control sensorsare

reading out of range. The factory default is full system

shutdown. (Refer to Table 3-5).

3.3.4 Generator Protection

Function codes Cd31(Stagger Start, Offset Time) and

Cd32 (Current Limit) may be operator set to control

startupsequenceofmultipleunitsandoperatingcurrent

draw.Thefactorydefaultallowsondemandstarting(no

delay) of units and normal current draw. Refer to

Table 3-5.

3.3.5 Compressor High Temperature, Low Pres-

sure Protection.

The controller monitors compressor suction and

discharge temperatures and pressures. If the discharge

temperature exceeds a certain limit, the liquidinjection

valve is opened to provide sufficient liquid refrigerant

flow into the economizer line to reduce the discharge

temperature. If the liquid injection is unable to reduce

the discharge temperature sufficiently and the

temperature exceeds the allowed limit, the compressor

will cycleoff ona 3 minute timer. The compressor will

alsocycleoffinasimilarmannerifthesuctionpressure

fallsbelowtheallowedlimit.Condenserandevaporator

fans continue to operate during the compressor off

cycle.

3.3.6 Perishable Mode -- Conventional

The unit is capable of maintaining supply air

temperatureto within ¦0.25_C(¦0.5_F) ofset point.

Supply air temperature is controlled by positioning of

the suction modulation valve (SMV), cycling of the

compressor and cycling of the heaters.

When cooling from a temperature that is more than

2.5_C (4.5_F)abovesetpoint,thesystemwillbe in the

perishable pull down mode. It will be in economized

operation with a target SMV position of 100% open.

However, pressure and current limit functions may

restrict the valve, if either exceeds the preset value.

Once set point is reached, the unit will transition to the

perishable steady state mode. This results in unloaded

operation with some restriction of the SMV. TheSMV

will continue to close and restrict refrigerant flow until

the capacity of the unit and the load are balanced.

If the SMV is at minimum modulation, the controller

has determined that cooling is not required, or the

controllerlogicdeterminessuctionpressureisatthelow

pressure limit, the unit will transition to the perishable

idle mode. The compressor is turned off and the

evaporator fans continue to run to circulate air

throughout the container. If temperature rises above set

point +0.2_C, the unit will transition back to the

perishable steady state mode

If the temperature drops to 0.5_C (0.9_F) below set

point, the unit will transition to the perishable heating

3-5 T-309

mode and the heaters will be energized . The unit will

transition back to the perishable idle mode when the

temperature rises to 0.2_C (0.4_F) below the set point

and the heaters will de-energize

3.3.7 Perishable Mode -- Economy

The economy mode is an extension oftheconventional

mode. The mode is activated when the setting of

function code Cd34 is “ON”. Economy mode is

provided for power saving purposes. Economy mode

could be utilized in the transportation of temperature

tolerant cargo or non-respiration items which do not

require high airflow for removing respiration heat.

Thereis noactivedisplayindicatorthat economymode

has been activated. To check for economy mode,

perform a manual display of code Cd34.

In order to achieve economy mode, a perishable set

point must be selected prior to activation. When

economy mode is active, the evaporator fans will be

controlled as follows:

At the start of each cooling or heating cycle, the

evaporator fans will be run in high speed for three

minutes. They will then be switched to low speed any

time the supply air temperature is within ¦0.25_C

(0.45_F)ofthesetpointandthereturnairtemperatureis

less than or equal to the supply air temperature + 3_C

(5.4_F). The fans will continue to run in low speed for

onehour.Attheendofthehour,theevaporatorfanswill

switchbacktohighspeedandthecyclewillberepeated.

If bulb modeis active, the economy fan activity will be

overwritten.

3.3.8 Perishable Mode -- Dehumidification

The dehumidification mode is provided to reduce the

humidity levels inside the container. The mode is

activated when a humidity value is set at at function

code Cd33.The displaymodule SUPPLYled willflash

ON and OFF every second to indicate that the

dehumidification mode is active. Once the Mode is

active and the following conditions are satisfied, the

controller will activate the heat relay to begin

dehumidification.

1. The humidity sensor reading is above the set point.

2. The unit is in the perishable steady state mode and

supply airtemperature isless than 0.25_C aboveset

point.

3. Theheaterdebouncetimer(threeminutes)hastimed

out.

4. Heater termination thermostat (HTT) is closed.

If theaboveconditions are truetheevaporator fans will

switch from high to low speed operation. The

evaporatorfanspeedwillswitcheveryhourthereafteras

long as all conditions are met (see Bulb Mode section

for different evaporator fan speed options). If any

condition except for item (1) becomes false OR if the

relative humidity sensed is 2% below the

dehumidification set point, the high speed evaporator

fans will be energized.

In the dehumidification mode power is applied to the

defrost and drain pan heaters. This added heat load

causes the controller to open the suction modulating

valve to match the increased heat load while still

holding the supply airtemperaturevery closeto the set

point.

Opening the modulating valvereduces the temperature

oftheevaporatorcoilsurface,whichincreasestherateat

which water is condensed from the passing air.

Removing water from the air reduces the relative

humidity. When the relative humidity sensed is 2%

belowthesetpoint, thecontrollerde-energizestheheat

relay. The controller will continue to cycle heating to

maintainrelativehumiditybelowtheselectedsetpoint.

If the mode is terminated by a condition other than the

humidity sensor, e.g., an out-of-range or compressor

shutdown condition, the heat relay is de-energized

immediately.

Two timers are activated in the dehumidificationmode

toprevent rapidcyclingandconsequent contactorwear.

They are:

1. Heater debounce timer (three minutes).

2. Out-of-range timer (five minutes).

The heater debounce timer is started whenever the

heater contactor status is changed. The heat contactor

remains energized (or de-energized) for at least three

minutes even if the set point criteria are satisfied.

The out-of-range timer is started to maintain heater

operationduring atemporaryout-of-rangecondition.If

the supply air temperature remains outside of the user

selectedin-rangesettingformorethanfiveminutes,the

heaters will be de-energized to allow the system to

recover. The out-of-range timer starts as soon as the

temperature exceeds thein-range tolerance value set by

function code Cd30.

3.3.9 Perishable, Dehumidification -- Bulb Mode

Bulb mode is an extension of the dehumidification

modewhichallowschangestotheevaporatorfanspeed

and/or defrost termination set points.

Bulb mode is active when configuration code Cd35 is

set to “Bulb”. Once the bulb mode is activated, the user

maythenchangethedehumidificationmodeevaporator

fan operation from the default (speed alternates from

low to high each hour) to constant low or constant high

speed. This is done by toggling function code Cd36

fromitsdefaultof“alt”to“Lo”or“Hi”asdesired.Iflow

speedevaporatorfanoperationisselected,thisgivesthe

user the additional capability of selecting

dehumidification set points from 60 to 95% (instead of

the normal 65 to 95%).

In addition, if bulb modeis active, function codeCd37

may be set to override theprevious defrosttermination

thermostat settings. (Refer to paragraph 4.9.5.) The

temperatureatwhichthedefrostterminationthermostat

will be considered “open” may be changed [in 0.1_C

(0.2_F) increments] to any value between 25.6_C

(78_F)and4_C(39.2_F).Thetemperatureatwhichthe

defrost termination thermostat is considered closed for

interval timer start or demand defrost is 10_Cfor

“open” values from 25.6_C(78_F) down to a 10_C

setting. For “open” values lower than 10_C, the

“closed” values will decrease to the same value as the

“open” setting. Bulb mode is terminated when:

3-6T-309

1. Bulb mode code Cd35 is set to “Nor.”

2. Dehumidification code Cd33 is set to “Off.”

3. The user changes the set point to one

that is in the frozen range.

When bulb mode is disabled by any of the above, the

evaporatorfanoperationfordehumidificationrevertsto

“alt”andtheDTSterminationsettingresetstothevalue

determinedbycontrollerconfigurationvariableCnF41.

3.3.10 Temperature Control -- Frozen Mode

With configuration variable CnF26 (Heat Lockout

Temperature)setto--10_Cthefrozenmodeofoperation

is active with set points at or below --10_C(+14_F).

Withthevariablesetto --5_C,the frozenmodeis active

at or below --5_C(+23_F).

When in the frozen mode the controller maintains the

return air temperature at set point, the RETURN

indicatorlightwillbeilluminatedonthedisplaymodule

and the default reading on the display window will be

the return air probe reading.

When the return air temperature enters the in-range

temperature tolerance as selected at function code

Cd30, the in-range light will energize.

3.3.11 Frozen Mode -- Conventional

Frozen range cargos are not sensitive to minor

temperature changes. The method of temperature

control employed in this range takes advantage of this

facttogreatlyimprovetheenergyefficiencyoftheunit.

Temperaturecontrolinthefrozenrangeisaccomplished

bycyclingthecompressoronandoffastheloaddemand

requires.

When cooling from a temperature that is more than

2.5_C (4.5_F)abovesetpoint,thesystemwillbe in the

frozenpulldownmode.Itwilltransitiontoeconomized

operation with a target SMV position of 100% open.

However, pressure and current limit functions may

restrict the valve, if either exceeds the preset value.

Once set point is reached, the unit will transition to the

frozen steady state mode. (Economized operation with

maximum allowed suction modulating valve opening.)

When temperature drops to set point minus 0.2_Cand

thecompressorhasrunforatleastfiveminutes,theunit

will transition to the frozen idle mode. The compressor

is turned off and the evaporator fans continue to run to

circulate air throughout the container. If temperature

rises above set point +0.2_C, the unit will transition

back to the frozen steady state mode.

If the temperaturedrops 10_C below set point, the unit

will transition to the frozen “heating” mode. In the

frozen heating mode the evaporator fansare broughtto

high speed. The unit will transition back to the frozen

steadystatemodewhenthetemperaturerisesbacktothe

transition point.

3.3.12 Frozen Mode -- Economy

In order to activate economy frozen mode operation, a

frozen set point temperature must be selected. The

economymodeisactivewhenfunctioncodeCd34isset

to “ON”. When economy mode frozen is active, the

system will perform normal frozen mode operations

except that the entire refrigeration system, excluding

the controller, will be turned off when the control

temperature is less than or equal to the set point -- 2_C.

After an off-cycle period of 60 minutes, the unit will

turn on high speed evaporator fans for three minutes,

and then check the control temperature. If the control

temperature is greater than or equal to the set point +

0.2_C.,theunitwillrestarttherefrigerationsystemand

continue to cool until the previously mentioned

off-cycle temperature criteria are met. If the control

temperature is less than the set point + 0.2_C, the unit

will turn off the evaporator fans and restart another 60

minute off-cycle.

3.4 CONTROLLER ALARMS

Alarm display is an independent controller software

function. If an operating parameter is outside of

expected range or a components does not return the

correct signals back to the controller an alarm is

generated. A listing of the alarms is provided in

Table 3-6.

The alarm philosophy balances the protection of the

refrigeration unit and that of therefrigerated cargo.The

action taken when anerror is detected always considers

thesurvivalofthecargo.Rechecksaremadetoconfirm

that an error actually exists.

Somealarmsrequiringcompressorshutdownhavetime

delays beforeand afterto try to keepthe compressoron

line. An example is alarm code “LO”, (low main

voltage), when a voltage drop of over 25% occurs, an

indication is given on the display, but the unit will

continue to run.

When an Alarm Occurs:

a. The red alarm light will illuminate for alarm code

numbers 13, 17, 20, 21, 22, 23, 24, 25, 26, and 27.

b. If a detectable problem is found to exist, its alarm

code will be alternately displayed with the set point

on the left display.

c. Theusershould scrollthroughthealarmlisttodeter-

minewhatalarms existor haveexisted. Alarmsmust

bediagnosedandcorrectedbeforetheAlarmListcan

be cleared.

To Display Alarm Codes :

a. While in the Default Display mode, press the

ALARMLISTkey.ThisaccessestheAlarmListDis-

playMode,whichdisplaysanyalarmsarchivedinthe

Alarm Queue.

b. The alarm queue stores up to 16 alarms in the se-

quence in which they occurred. The user may scroll

through the list by depressing an ARROW key.

c. The left display will show “AL##,” where ## is the

alarm number sequentially in the queue.

d. The right display will show the actual alarm code.

“AA##” will display for an active alarm, where“##”

isthealarmcode. Or“IA##”will displayfor an inac-

tive alarm. See Table 3-6.

3-7 T-309

e. “END” is displayed to indicate the end of the alarm

list if any alarms are active.

f. “CLEAr” is displayed if all alarms are inactive. The

alarmqueuemaythanbeclearedbypressingtheEN-

TER key. The alarm list will clear and “-- -- -- -- --”

will be displayed.

3.5. UNIT PRE-TRIP DIAGNOSTICS

Pre--Trip Diagnostics is an independent controller

function which will suspend normal refrigeration

controller activities and provide preprogrammed test

routines. The test routines include Auto Mode testing,

which automatically preforms a pre programmed

sequenced of tests, or Manual Mode testing, which

allows the operator to select and run any of the

individual tests. CAUTION

Pre-tripinspectionshouldnotbeperformed

with critical temperaturecargoes in thecon-

tainer. CAUTION

When Pre-Trip key is pressed, economy, de-

humidification and bulb mode will be deac-

tivated. AtthecompletionofPre-Tripactivi-

ty, economy, dehumidification and bulb

mode must be reactivated.

Testing may be initiated by use of the Key Pad or via

communication, but when initiated by communication

the controller will execute the entire battery of tests

(auto mode).

At the end of a pre-trip test, the message “P,” “rSLts”

(pretestresults)will be displayed. Pressing theENTER

keywillallowtheusertoseethe resultsforallsubtests.

The results will be displayed as “PASS” or “FAIL” for

all the tests run to completion.

Adetaileddescriptionofthepre-triptestsandtestcodes

isprovidedin Table 3-7.detailedoperatinginstructions

are provided in paragraph 4.7.

3.6 DataCORDER

3.6.1 Description

The Carrier Transicold “DataCORDER,” software is

integratedintothecontrollerandservesto eliminatethe

temperature recorder and paper chart. The

DataCORDER functions may be accessed by key pad

selectionsandviewedonthedisplaymodule.Theunitis

also fitted with interrogation connections (see

Figure 3- 1) which may be used with the Carrier

Transicold Data Reader to down load data. A personal

computer with Carrier Transicold Data View software

may also be used to download data and configure

settings. The DataCORDER consists of:

Configuration Software

Operational Software

Data Storage Memory

Real Time Clock (with internal battery backup)

Six thermistor inputs

Interrogation Connections

Power supply (battery pack).

The DataCORDER performs the following functions:

a. Logs data at 15, 30, 60 or 120 minute intervals and

storestwoyears’ofdata(basedononehourinterval).

b. Records and displays alarms on the display module.

c. Records results of pre--trip testing.

d. RecordsDataCORDERandtemperaturecontrolsoft-

ware generated data and events as follows:

Container ID Change

Software Upgrades

Alarm Activity

Battery Low (Battery Pack)

Data Retrieval

Defrost Start and End

Dehumidification Start and End

Power Loss (w/wo battery pack)

Power Up (w/wo battery pack)

Remote Probe Temperatures in the Container

(USDA Cold treatment and Cargo probe recording)

Return Air Temperature

Set Point Change

Supply Air Temperature

RealTimeClockBattery(InternalBattery)Replace-

ment

Real Time Clock Modification

Trip Start

ISO Trip Header (When entered via Interrogation

program)

Economy Mode Start and End

“Auto 2” Pre-Trip Start and End

Bulb Mode Start

Bulb Mode changes

Bulb Mode End

USDA Trip Comment

Humidification Start and End

USDA Probe Calibration

3.6.2 DataCORDER Software

The DataCORDER Software is subdivided into the

Configuration Software, Operational Software and the

Data Memory.

a. Operational Software

The Operational Software reads and interprets inputs

for use by the Configuration Software. The inputs are

labeled Function Codes. There are 35 functions (see

Table 3-8) which the operator may access to examine

the current input data or stored data. To access these

codes, do the following:

1 Press the ALT. MODE & CODE SELECT keys.

2 Press an arrowkey until theleftwindow displaysthe

desired code number. The right window will display

the value of this item for five seconds before return-

ing to the normal display mode.

3 If a longer time is desired, press the ENTER key to

extend the time to 30 seconds.

3-8T-309

Table 3-2 DataCORDER Configuration Variables

CONFIGURATION NO. TITLE DEFAULT OPTION

dCF01 (Future Use) -- -- -- --

dCF02 Sensor Configuration 2 2,5,6,9,54,64,94

dCF03 Logging Interval (Minutes) 60 15,30,60,120

dCF04 Thermistor Format Short Low, Normal

dCF05 Thermistor Sampling Type AA,b,C

dCF06 Controlled Atmosphere/Humidity Sampling Type AA,b

dCF07 Alarm Configuration USDA Sensor 1 AAuto, On, Off

dCF08 Alarm Configuration USDA Sensor 2 AAuto, On, Off

dCF09 Alarm Configuration USDA Sensor 3 AAuto, On, Off

dCF10 Alarm Configuration Cargo Sensor AAuto, On, Off

b. Configuration Software

The configuration software controls the recording and

alarmfunctionsoftheDataCORDER.Reprogramming

tothefactoryinstalledconfigurationisachievedviathe

same configuration card as the unit control module

software. Changes to the unit DataCORDER

configuration may be made made using the Data View

integration device. A listing of the configuration

variables is provided in Table 3-2. Descriptions of

DataCORDER operation for each variable setting are

provided in the following paragraphs.

3.6.3 Sensor Configuration (dCF02)

Two modes of operation may be configured, the

Standard Mode and the Generic Mode.

a. Standard Mode

In the standard mode, the user may configure the

DataCORDER to record data using one of seven

standard configurations. Standard configuration

variables, with descriptions, are listed in Table 3-3.

Thesixthermistorinputs(supply,return,USDA#1,#2,

#3 and cargo probe) and thehumidity sensor input will

be generated by the DataCORDER. An example of a

report using a standard configuration is shown in

Figure 3- 5.

NOTE

The DataCORDER software uses the supply

and return recorder sensors (SRS,RRS). The

temperature control software uses the supply

and return temperature sensors (STS,RTS) .

b. Generic Mode

Thegenericrecordingmodeallowsuserselection ofthe

network data points to be recorded. The user may select

up to a total of eight data points for recording. A listof

the data points available for recording follows.

Changing the configuration to generic and selecting

which data points to record may be done using the

Carrier Transicold Data Retrieval Program.

1. Control mode

2. Control temperature

3. Frequency

4. Humidity

5. Phase A current

6. Phase B current

7. Phase C current

8. Main voltage

9. Suction modulation valve percentage

10. Discrete outputs (Bit mapped -- require special

handling if used)

11. Discrete inputs (Bit mapped -- require special

handling if used)

12. Ambient sensor

13. Compressor suction sensor

14. Compressor discharge sensor

15. Return temperature sensor

16. Supply temperature sensor

17 Defrost temperature sensor

18. Discharge pressure transducer

19. Suction pressure transducer

20. Condenser pressure transducer

Table 3-3 DataCORDER Standard Configurations

Standard

Config. Description

2sensors

(dCF02=2) 2 thermistor inputs(supply & return)

5sensors

(dCF02=5) 2 thermistor inputs(supply & return)

3 USDA thermistor inputs

6sensors

(dCF02=6) 2 thermistor inputs(supply & return)

3 USDA thermistor inputs

1 humidity input

9sensors

(dCF02=9) Not Applicable

6sensors

(dCF02=54) 2 thermistor inputs(supply & return)

3 USDA thermistor inputs

1 cargo probe (thermistor input)

7sensors

(dCF02=64)

2 thermistor inputs(supply & return)

3 USDA thermistor inputs

1 humidity input

1 cargo probe (thermistor input)

10 sensors

(dCF02=94)

2 thermistor inputs(supply & return)

3 USDA thermistor inputs

1 humidity input

1 cargo probe (thermistor input)

3 C.A. inputs (NOT APPLICABLE)

3-9 T-309

Raw Data Report for ABC1234567

May 31, 2001 to Jun 04, 2001

System Configuration at the Time of Interrogation:

Interrogated On Sept05, 2001

Extracted by DataLine Rev 1.0.0

Controller Software: 5120

Controller Serial #: 04163552

Bill of Lading #: 1

Origin: Origin Date:

Destination: Discharge Date:

Comment: DataLine Tool

Probe Calibration Readings: USDA1: 0.0 USDA2: 0.0 USDA3: 0.0 Cargo: 0.0

Temperature Units: Centigrade

________________________________________________________________________________________

May 31, 2001

Setpoint: 1.66, Container : Serial : 04189552

9 Sensors Logged at 15 Minute Interval

Sensor Format Resolution

Figure 3- 5 Standard Configuration Download Report

3-10T-309

3.6.4 Logging Interval (dCF03)

The user may select four different time intervals

between data recordings. Data is logged at exact

intervals in accordance with the real time clock. The

clock is factory set at Greenwich Mean Time (GMT).

3.6.5 Thermistor Format (dCF04)

The user may configure the format in which the

thermistorreadingsarerecorded.Theshortresolutionis

a1byteformatandthelongresolutionisa2byteformat.

Theshortrequireslessmemoryandrecordstemperature

in0.25°C(0.45°F)stepswhenintheperishablemodeor

0.5°C (0.9°F) steps when in the frozen mode. The long

records temperature in 0.01°C (0.02°F) steps for the

entire range.

3.6.6 Sampling Type (dCF05 & dCF06)

Three types of data sampling are available, average,

snapshot and USDA. When configured to average, the

average of readings taken every minute over the

recording period is recorded. When configured to

snapshot, the sensor reading at the log intervale timeis

recorded. When USDA is configured the supply and

return temperature readings are averaged and the 3

USDA probe readings are snapshot.

3.6.7 Alarm Configuration (dCF07 -- dCF10)

The USDA and cargo probe alarms may be configured

to OFF, ON or AUTO.

IfaprobealarmisconfiguredtoOFF,thenthealarmfor

this probe is always disabled.

IfaprobealarmisconfiguredtoON,thentheassociated

alarm is always enabled.

If the probes are configured to AUTO, they act as a

group. This function is designed to assist users who

keep their DataCORDER configured for USDA

recording, but do not install the probes forevery trip.If

all the probes are disconnected, no alarms areactivated.

As soon asone of theprobes is installed, thenall ofthe

alarmsareenabledandtheremainingprobesthatarenot

installed will give active alarm indications.

The DataCORDER will record the initiation of a

pre-trip test (refer to paragraph 3.5) and the results of

each of the tests included in pre--trip. The data is

time-stamped and may be extracted via the Data

Retrieval program. Refer to Table 3-9 for a description

of the data stored in the DataCORDER for each

corresponding Pre-Trip test.

3.6.8 DataCORDER Power-Up

The DataCORDER may be powered up in any one of

four ways:

1. Normal AC power: The DataCORDER is powered

up when the unit is turned on via the stop-start switch.

2. ControllerDCbatterypackpower:Ifabatterypack

is installed, the DataCORDER will power up for

communication when an interrogation cable is plugged

into an interrogation receptacle.

3. External DC battery packpower: A 12 volt battery

pack may also be plugged into the back of the

interrogation cable, which is then plugged into an

interrogation port. No controller battery pack is

required with this method.

4. Real Time Clock demand: If the DataCORDER is

equipped with a charged battery pack and AC power is

not present, the DataCORDER will power up when the

real time clock indicates that a data recording should

take place. When the DataCORDER is finished

recording, it will power down.

During DataCORDER power-up, while using

battery-pack power, the controller will perform a

hardware voltage check on the battery. If the hardware

checkpasses,theController willenergizeandperforma

software battery voltage check before DataCORDER

logging. If either test fails, the real time clock battery

power-up will be disabled until the next AC power

cycle. Further DataCORDER temperature logging will

be prohibited until that time.

An alarm will be generated when the battery voltage

transitions from good to bad indicating that the battery

pack needs recharging. If the alarm condition persists

for more than 24 hours on continuous AC power, the

battery pack needs replacement.

3.6.9 Pre-Trip Data Recording

The DataCORDER will record the initiation of a

pre-trip test (refer to paragraph 3.5) and the results of

each of the tests included in pre--trip. The data is

time-stamped and may be extracted via the Data

Retrieval program. Refer to Table 3-9 for a description

of the data stored in the DataCORDER for each

corresponding Pre-Trip test.

3.6.10 DataCORDER Communications

Data retrieval from the DataCORDER can be

accomplished by using one of the following;

DataReader, DataLine/DataView or a communications

interface module.

a. DataReader

The Carrier Transicold Data Reader (see Figure 3- 6)is

asimpletooperatehandhelddevicedesignedtoextract

data from the DataCORDER and then upload it to a

personal computer. The Data Reader has the ability to

storemultipledatafiles.RefertoDataRetrievalmanual

62-02575 for a more detailed explanation of the

DataReader

3-11 T-309

DataReader

Figure 3- 6 Data Reader

b. DataView

The DataView software for a personal computer is

supplied on a floppy disk. This software allows

interrogation, configuration variable assignment,

screen view of the data, hard copy report generation,

cold treatment probe calibration, cold treatment

initialization and file management. Refer to Data

Retrieval manual 62-02575 for a more detailed

explanation of the DataView interrogation software.

c. Communications Interface Module

The communications interface module is a slave

module which allows communication with a master

central monitoring station. The module will respondto

communication and return information over the main

power line.

With a remote monitoring unit installed, all functions

andselectablefeaturesthatareaccessibleattheunitmay

be performed at the master station. Retrieval of all

DataCORDER reportsmay also beperformed. Referto

the master system technical manual for further

information.

d. DataLine

The DataLINE software for a personal computer is

supplied on both floppy disks and CD. This software

allows interrogation, configuration variable

assignment, screen view of the data, hard copy report

generation, cold treatment probe calibration and file

management.RefertoDataRetrievalmanual62-10629

for a more detailed explanation of the DataLINE

interrogation software. The DataLine manual may be

found on the net at www.contaner.carrier.com

3.6.11 USDA Cold Treatment

Sustained cold temperature has been employed as an

effective postharvest method for the control of

Mediterranean and certain other tropical fruit flies.

Exposing infested fruit to temperatures of 2.2 degrees

Celsius (36_F) or below for specific periods results in

the mortality of the various stages of this group of

insects.

In response to the demand to replace fumigation with

this environmentally sound process, Carrier has

integrated Cold Treatment capability into its

microprocessor system. These units have the ability to

maintain supply air temperature within one-quarter

degreeCelsiusofsetpointandrecordminutechangesin

product temperature within the DataCORDER

memory, thus meeting USDA criteria. Information on

USDA is provided in the following subparagraphs

a. USDA Recording

A special type of recording is used for USDA cold

treatment purposes. Cold treatment recording requires

threeremotetemperatureprobesbeplacedatprescribed

locations in the cargo. Provision is made to connect

these probes to the DataCORDER via receptacles

locatedat therearleft-handsideoftheunit.Fourorfive

receptacles are provided. The four three-pin receptacles

are for the probes. The five pin receptacle is the rear

connection for the Interrogator. The probe receptacles

are sized to accept plugs with tricam coupling locking

devices. A label on the back panel of the unit shows

which receptacle is used for each probe.

The standard DataCORDER report displays the supply

and return air temperatures. The cold treatment report

displaysUSDA#1, #2, #3 andthe supplyand returnair

temperatures. Cold treatment recording is backed upby

a battery so recording can continue if AC power is lost.

b. USDA/ Message Trip Comment

AspecialfeatureisincorporatedinDataLine/DataView

which allows the user to enter a USDA (or other)

message in the header of a data report. The maximum

messagelengthis 78 characters. Onlyonemessagewill

be recorded per day.

3.6.12 USDA Cold Treatment Procedure

The following is a summary of the steps required to

initiate a USDA Cold Treatment.

a. Calibrate the three USDA probes by ice bathing the

probes and performing the calibration function with

theDataReader, DataView orDataLine. This calibra-

tion procedure determines the probe offsets and

stores them in the controllerfor usein generatingthe

cold treatment report. Refer to the Data Retrieval

manual 62-02575 for more details.

b. Pre-coolthecontainertothetreatmenttemperatureor

below.

c..InstalltheDataCORDERmodulebatterypack(ifnot

already installed).

d. Place the three probes. The probes areplaced intothe

pulpoftheproduct(atthelocationsdefinedinthefol-

lowing table) as the product is loaded.

3-12T-309

Sensor 1 Place in pulp of the product located next

to the return air intake.

Sensor 2

Place in pulp of the product five feet

from the end of the load for 40 foot con-

tainers, or three feet from the end of the

load for 20 foot containers. This probe

should be placed in a center carton at

one-half the height of the load.

Sensor 3

Place in pulp of product five feet from

the end of the load for 40 foot containers

or three feet from the end of the load for

20 foot containers. This probe should be

placed in a carton at a side wall at one-

half the height of the load.

e. To initiate USDA Recording, connect the personal

computer and perform the configuration as follows,

using either the Data View or Data Line software:

1. Enter ISO header information

2. Enter a trip comment if desired

3. Configure the DataCORDER for five probes (s, r,

P1, P2, P3) (dcf02=5)

4. Configure the logging interval for one hour.

5. Set the sensor configuration to “USDA”.

6. Configure for two byte memory storage format

(dcf04=LONG).

7. Perform a “trip start”

3.6.13 DataCORDER Alarms

The alarm display is an independent DataCORDER

function. If an operating parameter is outside of the

expected range or a component does not return the

correct values back to the DataCORDER an alarm is

generated.TheDataCORDERcontainsabufferofupto

eight alarms. A listing of the DataCORDER alarms is

provided in Table 3-10, page 3-27. Refer to paragraph

3.6.7 for configuration information.

To display alarm codes:

a. While in the Default Display mode, press the ALT.

MODE&ALARMLISTkeys.Thisaccesses theDa-

taCORDER Alarm List Display Mode, which dis-

plays any alarms stored in the Alarm Queue.

b. ToscrolltotheendofthealarmlistpresstheUPAR-

ROW. Depressing the DOWN ARROW key will

scroll the list backward.

c. The left display will show “AL#” where # is the

alarms number in the queue. The right display will

show “AA##,” if the alarm is active, where ## is the

alarmnumber. “IA##,”willshowifthealarmisinac-

tive

d. “END” is displayed to indicate the end of the alarm

list if any alarms are active. “CLEAr” is displayed if

all the alarms in the list are inactive.

e. If no alarms are active, the Alarm Queue may be

cleared. The exception to this rule is the DataCORD-

ERAlarmQueueFullalarm(AL91),whichdoesnot

have to beinactive in order to clear the alarm list. To

Clear the Alarm List:

1. Press the ALT. MODE & ALARM LIST keys.

2. PresstheUP/DOWNARROWkeyuntil“CLEAr”is

displayed.

3. Press the ENTER key. The alarm list will clear and

“-- -- -- -- --” will be displayed.

4. Press the ALARM LIST key. “AL” will show on the

leftdisplayand“-- -- -- -- --”ontherightdisplaywhen

there are no alarms in the list.

5. Upon clearing of the Alarm Queue, the Alarm light

will be turned off.

3.6.14 ISO Trip Header

DataLine provides the user with an interface to

view/modify current settings of the ISO trip header

through the ISO Trip Header screen.

The ISO Trip Header screen is displayed when the user

clicks on the “ISO Trip Header” button in the “Trip

Functions” Group Box on the System Tools screen.

F9 function -- Provides the user with a shortcut for

manually triggering the refresh operation.Before

sending modified parameter values, the user must

ensure that a successful connection is established with

the Controller.

IftheconnectionisestablishedwiththeDataCorder,the

current contents of the ISO Trip Header from the

DataCorder will be displayed in each field. If the

connection is not established with the DataCorder, all

fields on the screen will bedisplayed as “X’s”.If at any

time during the display of the ISO Trip Header screen

the connection is not established or is lost, the user is

alerted to the status of the connection.

After modifying the values and ensuring a successful

connectionhasbeenmadewiththeDataCorder, clickon

the “Send” button to send the modified parameter

values.

ThemaximumallowedlengthoftheISOTripHeaderis

128 characters.If the user tries to refresh the screen or

close the utility without sending the changes made on

the screen to the DataCorder, the user is alerted with a

message.

3-13 T-309

Table 3-4 Controller Configuration Variables

NOTES

1. Configuration numbers not listed are not used in this application. Theseitems may appear when loading

configuration software to the controller but changes will not be recognized by the controller programming.

CONFIGURATION

NUMBER TITLE DEFAULT OPTION

CnF02 Evaporator Fan Speed dS (Dual) SS (Single)

CnF04 Dehumidification Mode On OFF

CnF11 Defrost “Off” Selection noOFF OFF

CnF16 DataCORDER Present On (Yes) OFF (No)

CnF22 Economy Mode Option OFF Std, Full

CnF23 Defrost Interval Timer Save Option noSAv SAv

CnF24 Long Pre Trip Test Sequence Enabled On Off

CnF25 Pre-Trip Test Points/Results Recording Option rSLtS dAtA

CnF26 Heat Lockout Change Option Set to --10_CSet to --5_C

CnF28 Bulb Mode Option NOr bULb

CnF31 Probe Check Option Std SPEC

CnF33 Snap Freeze Option OFF SnAP

CnF34 Degree Celsius Lockout Option bOth _F

CnF37 Electronic Temperature Recorder rEtUR (Return) suPPl, BOth

3-14T-309

Table 3-5 Controller Function Codes (Sheet 1 of 3)

Code

No. TITLE DESCRIPTION

Note: If the function is not applicable, the display will read “-- -- -- -- --”

Display Only Functions

Cd01 Suction Modulation

Valve Opening (%) Displays the SMV percent open. The right display reads 100% when the valve is

fully open. The valve will usually be at 10% on start up of the unit except in very

high ambient temperatures.

Cd02 Not Applicable Not used

Cd03 Compressor Motor

Current The current sensor measures current draw in lines L1 & L2 by all of the high

voltage components. It also measures current draw in compressor motor leg T3.

The compressor leg T3 current is displayed.

Cd04

Cd05

Cd06

Line Current,

Phase A

Line Current,

Phase B

Line Current,

Phase C

The current sensor measures current on two legs. The third unmeasured leg is cal-

culated based on a current algorithm. The current measured is used for control

and diagnostic purposes. For control processing, the highest of the Phase A and B

current values is used for current limiting purposes. For diagnostic processing,

the current draws are used to monitor component energization.. Whenever a heat-

er or a motor is turned ON or OFF, the current draw increase/reduction for that

activity is measured. The current draw is then tested to determine if it falls within

the expected range of values for the component. Failure of this test will result in a

pre-trip failure or a control alarm indication.

Cd07 Main Power Voltage The main supply voltage is displayed.

Cd08 Main Power Fre-

quency The value of the main power frequency is displayed in Hertz. The frequency dis-

played will be halved if either fuse F1 or F2 is bad (alarm code AL21).

Cd09 Ambient Tempera-

ture The ambient sensor reading is displayed.

Cd10 Compressor Suction

Temperature Compressor suction temperature sensor reading is displayed.

Cd11 Compressor Dis-

charge Temperature Compressor discharge temperature sensor reading is displayed.

Cd12 Compressor Suction

Pressure Compressor suction pressure transducer reading is displayed.

Cd13 Not Applicable Not used

Cd14 Compressor Dis-

charge Pressure Compressor discharge pressure transducer reading is displayed.

Cd15 Unloader Valve The status of the valve is displayed (Open - Closed).

Cd16 Compressor Motor

Hour Meter Records total hours of compressor run time. Total hours are recorded in incre-

ments of 10 hours (i.e., 3000 hours is displayed as 300).

Cd17 Relative Humidity

(%) Humidity sensor reading is displayed. This code displays the relative humidity, as

a percent value.

Cd18 Software Revision # The software revision number is displayed.

Cd19 Battery Check

This code checks the Controller/DataCORDER battery pack. While the test is

running, “btest” will flash on the right display, followed by the result. “PASS”

will be displayed for battery voltages greater than 7.0 volts. “FAIL” will be dis-

played for battery voltages between 4.5 and 7.0 volts, and “-- -- -- -- --” will be

displayed for battery voltages less than 4.5 volts. After the result is displayed for

four seconds, “btest” will again be displayed, and the user may continue to scroll

through the various codes.

Cd20 Config/Model # This code indicates the dash number of the model for which the Controller is con-

figured (i.e., if the unit is a 69NT40-531-100, the display will show “31100”).

Cd21 Economizer Valve The status of the valve is displayed (Open - Closed).

3-15 T-309

Table 3-5 Controller Function Codes (Sheet 2 of 3)ff

Cd22 Compressor State The status of the compressor is displayed (Off, On).

Cd23 Evaporator Fan Displays the current evaporator fan state (high, low or off).

Cd24 Controlled

Atmosphere State Not used in this application

Cd25 Compressor Run

Time Remaining

Until Defrost This code displays the time remaining until the unit goes into defrost (in tenths of

an hour). This value is based on the actual accumulated compressor running time.

Cd26 Defrost Temperature

Sensor Reading Defrost temperature sensor reading is displayed.

Configurable Functions

NOTE

Function codes Cd27 through Cd37 are user-selectable functions. The operator can change the value of

these functions to meet the operational needs of the container.

Cd27 Defrost Interval

(Hours)

The defrost interval is the time between defrost cycles. Five selectable values are

available: 3, 6, 9, 12 or 24 hours. The factory default value is 12 hours. Follow-

ing a start--up or after termination of a defrost, the time will not begin counting

down until the defrost temperature sensor (DTS) reading falls below set point. If

the reading of DTS rises above set point any time during the timer count down,

the interval is reset and the countdown begins over. If DTS fails, alarm code

AL60 is activated and control switches over to the the return temperature sensor.

The controller will act in the same manner as with the DTS except the return tem-

perature sensor reading will be used.

Defrost Interval Timer Value (Configuration variable CnF23): If the software is

configured to “SAv” (save) for this option, then the value of the defrost interval

timer will be saved at power down and restored at power up. This option prevents

short power interruptions from resetting an almost expired defrost interval, and

possibly delaying a needed defrost cycle.

NOTE

The defrost interval timer counts only during compressor run time.

Cd28 Temperature Units

(_Cor_F)

This code determines the temperature units (_Cor_F) which will be used for all

temperature displays. The user selects _Cor_F by selecting function code Cd28

and pushing the ENTER key. The factory default value is Celsius units.

NOTE

This function code will display “--- --- --- --- --- “ if Configuration Variable

CnF34 is set to _F.

Cd29 Failure Action

(Mode)

If all of the control sensors are out of range (alarm code AL26) or there is a probe

circuit calibration failure (alarm code AL27), the unit will enter the shutdown

state defined by this setting. The user selects one of four possible actions as fol-

lows:

A-- FullCooling(compressorison,economizedoperation.SMVsubjecttopressure

and current limit.)

B -- PartialCooling (Compressoris on, standardoperation.SMVsubjecttopressure

and current limit.)

C -- EvaporatorFan Only(Compressoris off, evaporatorfanson high speed, not ap-

plicable with frozen set points.

D -- Full System Shutdown -- Factory Default (shut down every component in the

unit)

Cd30 In-Range Tolerance

The in-range tolerance will determine the band of temperatures around the set

point which will be designated as in-range. If the control temperature is in-range,

the in-range light will be illuminated. There are four possible values:

1=¦0.5_C(¦0.9_F)

2=¦1.0_C(¦1.8_F)

3=¦1.5_C(¦2.7_F)

4=¦2.0_C(¦3.6_F) -- Factory Default

3-16T-309

Table 3-5 Controller Function Codes (Sheet 3 of 3)

Cd31 Stagger Start Offset

Time (Seconds)

The stagger start offset time is the amount of time that the unit will delay at start-

up, thus allowing multiple units to stagger their control initiation when all units

are powered up together. The eight possible offset values are:

0 (Factory Default), 3, 6, 9, 12, 15, 18 or 21 seconds

Cd32 Current Limit

(Amperes)

The current limit is the maximum current draw allowed on any phase at any time.

Limiting the unit’s current reduces the load on the main power supply. This is

accomplished by reducing the SMV position until current draw is reduced to the

set point. When desirable, the limit can be lowered. Note, however, that capacity

is also reduced. The five values for 460vac operation are: 15, 17, 19, 21 (Factory

Default), 23

Cd33 Perishable Mode

Dehumidification

Control (% RH)

Relative humidity set point is available only on units configured for dehumidifi-

cation. When the mode is activated, the control probe LED flashes on and off ev-

ery second to alert the user. If not configured, the mode is permanently deacti-

vated and “-- -- -- -- --”willdisplay.Thevaluecanbesetto“OFF.”“TEST,”ora

range of 65 to 95% relative humidity in increments of 1%. [If bulb mode is active

(code Cd35) and “Lo” speed evaporator motors are selected (code Cd36) then set

point ranges from 60 to 95%.] When “TEST” is selected or test set point is

entered, the heat LED should illuminate, indicating that dehumidification mode is

activated. After a period of five minutes in the “TEST” mode has elapsed, the

previously selected mode is reinstated.

Cd34 Economy Mode

(On--Off) Economy mode is a user selectable mode of operation provided for power saving

purposes.

Cd35 Bulb Mode

Bulb mode is a user selectable mode of operation that is an extension of dehu-

midification control (Cd33). If dehumidification is set to “Off,” code Cd35 will

display “Nor” and the user will be unable to change it. After a dehumidification

set point has been selected and entered for code Cd33, the user may then change

code Cd35 to “bulb.” After bulb has been selected and entered, the user may then

utilize function codes Cd36 and Cd37 to make the desired changes.

Cd36 Evaporator Speed

Select

This code is enabled only if in the dehumidification mode (code Cd33) and bulb

mode (Cd35) has been set to “bulb”. If these conditions are not met, “alt” will be

displayed (indicating that the evaporator fans will alternate their speed) and the

display cannot be changed. If a dehumidification set point has been selected along

with bulb mode then “alt” may be selected for alternating speed, “Lo” for low

speed evaporator fan only, or “Hi” for high speed evaporator fan only. If a setting

other than “alt” has been selected and bulb mode is deactivated in any manner,

then selection reverts back to “alt.”

Cd37 Defrost Termination

Temperature Setting

(Bulb Mode)

This code, as with function code Cd36, is used with bulb mode and dehumidifica-

tion. If bulb mode is active, this code allows the user to change the temperature

defrost will terminate. It allows the user to change the setting within a range of

4_C to 25.6_Cin0.1_C (0.2_F) increments. This value is changed using the UP/

DOWN ARROW keys, followed by the ENTER key when the desired value is

displayed. If bulb mode is deactivated, the DTS setting returns to the default.

Display Only Functions -- Continued

Cd38 Secondary Supply

Temperature Sensor

Code Cd38 will display the current secondary supply temperature sensor reading

for units configured for four probes. If the unit is configured with a DataCORD-

ER, Cd38 will display “-- -- -- -- --.” If the DataCORDER suffers a failure,

(AL55) Cd38 will display the supply recorder sensor reading.

Cd39 Secondary Return

Temperature Sensor

Code Cd39 will display the current secondary return temperature sensor reading

for units configured for four probes. If the unit is configured with a DataCORD-

ER, Cd39 will display “-- -- -- -- --.” If the DataCORDER suffers a failure,

(AL55) Cd39 will display the return recorder sensor reading.

Cd40 Container Identifica-

tion Number Code Cd40 is configured at commissioning to read a valid container identifica-

tion number. The reading will not display alpha characters, only the numeric por-

tion of the number will display.

Cd41 Valve Override SERVICE FUNCTION: This code is used for troubleshooting and allows manu-

al positioning of the economizer, unloader, suction modulation and oil return

valves. Refer to paragraph 6.19 for operating instructions.

Cd42 Oil Return Valve The status of the valve is displayed (Open - Closed).

3-17 T-309

Table 3-6 Controller Alarm Indications (Sheet 1 of 4)

Code

No. TITLE DESCRIPTION

AL13 Expansion Module

Alarm 13 is triggered if the control module has lost communication with the ex-

pansion module for more than five minutes or communication fails within the

first 15 seconds on power up. This alarm triggers failure action C (evaporator fan

only) or D (all machinery off) of Function Code Cd29 if the unit has a perishable

set point. Failure action D (all machinery off) is triggered if the unit has a frozen

set point

AL14 Phase Sequence

Failure -- Electronic

Alarm 14 is triggered if the electronic phase detection system is unable to deter-

mine the correct phase relationship. DIRCHECK will be displayed while the

relationship is determined. If the system is unable to determine the proper rela-

tionship alarm 14 will remain active. Additiotnal information on phase detection

may be displayed at Function Code Cd41. If the right most digit of Code Cd41 is

3 or 4, this indicates incorrect motor or sensor wiring. If the right most digit is 5,

this indicates a failed current sensor assembly.

AL15 Loss Cooling Future Expansion

AL16 Compressor Current

High Alarm 16 is triggered if compressor current draw is 15% over calculated maxi-

mum for 10 minutes out of the last hour. The alarm is display only and will trig-

ger off when the compressor operates for one hour without over current.

AL17 Phase Sequence

Failure -- Pressure

Alarm 17 is triggered if a compressor start in both directions fails to generate

sufficient pressure differential. The controller will attempt restart every twenty

minutes and deactivate the alarm if successful. This alarm triggers failure action

C (evaporator fan only) or D (all machinery off) of Function Code Cd29 if the

unit has a perishable set point. Failure action D (all machinery off) is triggered if

the unit has a frozen set point

AL18 Discharge Pressure

High Alarm 18 is triggered if discharge pressure is 10% over calculated maximum for

10 minutes within the last hour. The alarm is display only and will trigger off

when the compressor operates for one hour without overpressure.

AL19 Discharge Tempera-

ture High Alarm 19 is triggered if discharge temperature exceeds 135_C (275_F) for 10

minutes within the last hour. The alarm is display only and will trigger off when

the compressor operates for one hour without over temperature.

AL20 Control Circuit Fuse

Open (24 vac) Alarm 20 is triggered by control power fuse (F3) opening and will cause the soft-

ware shutdown of all control units. This alarm will remain active until the fuse is

replaced.

AL21 Micro Circuit Fuse

Open (18 vac)

Alarm 21 is triggered by one of the fuses (F1/F2) being opened on 18 volts AC

power supply to the Controller. The suction modulation valve (SMV) will be

opened and current limiting is halted. Temperature control will be maintained by

cycling the compressor.

AL22 Evaporator Fan Mo-

tor Safety Alarm 22 responds to the evaporator motor internal protectors. The alarm is trig-

gered by opening of either internal protector. It will disable all control units until

the motor protector resets and the unit is power cycled.

AL23 Loss of Phase B

Alarm 23 is triggered if low current draw is detected on phase B and IPCP, HPS

or IPEM is not tripped. If the compressor should be running, the controller will

initiate a start up every five minutes and trigger off if current reappears. If the

evaporator fan motors only should be running, the alarm will trigger off is cur-

rent reappears. This alarm triggers failure action C (evaporator fan only) or D

(all machinery off) of Function Code Cd29 if the unit has a perishable set point.

Failure action D (all machinery off) is triggered if the unit has a frozen set point

AL24 Compressor Motor

Safety

Alarm 24 is triggered when compressor is not drawing any current. It also trig-

gers failure action ”C” or ”D” set by function Code 29 for perishable setpoint, or

”D” for frozen setpoint. This alarm will remain active until compressor draws

current.

3-18T-309

Table 3-6 Controller Alarm Indications (Sheet 2 of 4)

AL25 Condenser Fan Mo-

tor Safety

Alarm 25 is triggered by the opening of the condenser motor internal protector

and will disable all control units except for the evaporator fans. This alarm will

remain active until the motor protector resets. This alarm triggers failure action

C (evaporator fan only) or D (all machinery off) of Function Code Cd29 if the

unit has a perishable set point. Failure action D (all machinery off) is triggered if

the unit has a frozen set point

AL26 All Supply and Re-

turn temperature

Control Sensors

Failure

Alarm 26 is triggered if the Controller determines that all of the control sensors

are out-of-range. This can occur for box temperatures outside the range of --50_C

to +70_C(--58_F to +158_F). This alarm triggers the failure action code set by

Function Code Cd29.

AL27 A/D Accuracy Fail-

ure

The Controller has a built-in Analog to Digital (A-D) converter, used to convert

analog readings (i.e. temperature sensors, current sensors, etc.) to digital read-

ings. The Controller continuously performs calibration tests on the A-D con-

verter. If the A-D converter fails to calibrate for 30 consecutive seconds, this

alarm is activated.This alarm will be inactivated as soon as the A-D converter

calibrates.

AL28 Low Suction Pres-

sure

Alarm 28 is triggered if suction pressure is below 2 psia and alarm 66 (Suction

Pressure Transducer Failure) is not active. This alarm will be inactivated when

suction pressure rises above 2 psia for three continuous minutes. This alarm trig-

gers failure action C (evaporator fan only) or D (all machinery off) as determined

by User Selectable Failure Response if the unit has a perishable set point; Failure

action D (all machinery off) if the unit has a frozen set point. Reset SMV.

AL51 Alarm List Failure

During start-up diagnostics, the EEPROM is examined to determine validity of

its contents. This is done by testing the set point and the alarm list. If the con-

tents are invalid, Alarm 51 is activated. During control processing, any operation

involving alarm list activity that results in an error will cause Alarm 51 to be ac-

tivated. Alarm 51 is a “display only” alarm and is not written into the alarm list.

Pressing the ENTER key when “CLEAr” is displayed will result in an attempt to

clear the alarm list. If that action is successful (all alarms are inactive), Alarm 51

will be reset.

AL52 AlarmListFull Alarm 52 is activated whenever the alarm list is determined to be full; at start-up

or after recording an alarm in the list. Alarm 52 is displayed, but is not recorded

in the alarm list. This alarm can be reset by clearing the alarm list. This can be

done only if all alarms written in the list are inactive.

AL53 Battery Pack Failure Alarm 53 is caused by the battery pack charge being too low to provide sufficient

power for battery-backed recording. Renew replaceable batteries. If this alarm

occurs on start up, allow a unit fitted with rechargeable batteries to operate for up

to 24 hours to charge rechargeable batteries sufficiently to deactivate the alarm

AL54 Primary Supply

Temperature Sensor

Failure (STS)

Alarm 54 is activated by an invalid primary supply temperature sensor reading

that is sensed outside the range of --50 to +70_C(--58_F to +158_F) or if the

probe check logic has determined there is a fault with this sensor. If Alarm 54 is

activated and the primary supply is the control sensor, the secondary supply sen-

sor will be used for control if the unit is so equipped. If the unit does not have a

secondary supply temperature sensor, and AL54 is activated, the primary return

sensor reading, minus 2_C will be used for control.

NOTE

The P5 Pre-Trip test must be run to inactivate the alarm

AL55 DataCORDER

Failure This alarm activates to indicate the DataCORDER has a software failure. To

clear this alarm, reconfigure the unit to the current model number. This failure

may be the result of a voltage dip in access of 25%.

3-19 T-309

Table 3-6 Controller Alarm Indications (Sheet 3 of 4)

AL56 Primary Return

Temperature Sensor

Failure (RTS)

Alarm 56 is activated by an invalid primary return temperature sensor reading

that is outside the range of --50 to +70_C(--58_F to +158_F). If Alarm 56 is acti-

vated and the primary return is the control sensor, the secondary return sensor

will be used for control if the unit is so equipped. If the unit is not equipped with

a secondary return temperature sensor or it fails, the primary supply sensor will

be used for control.

NOTE

The P5 Pre-Trip test must be run to inactivate the alarm.

AL57 Ambient Tempera-

ture Sensor Failure Alarm 57 is triggered by an ambient temperature reading outside the valid range

from --50_C(--58_F) to +70_C (+158_F).

AL58 Compressor High

Pressure Safety Alarm 58 is triggered when the compressor high discharge pressure safety switch

remains open for at least one minute. This alarm will remain active until the pres-

sure switch resets, at which time the compressor will restart.

AL59 Heat Termination

Thermostat Alarm 59 is triggered by the opening of the heat termination thermostat and will

result in the disabling of the heater. This alarm will remain active until the ther-

mostat resets.

AL60 Defrost Temperature

Sensor Failure

Alarm 60 is an indication of a probable failure of the defrost temperature sensor

(DTS). It is triggered by the opening of the heat termination thermostat (HTT) or

the failure of the DTS to go above set point within two hours of defrost initia-

tion. After one-half hour with a frozen range set point, or one-half hour of contin-

uous compressor run time, if the return air falls below 7_C(45_F), the Controller

checks to ensure the DTS reading has dropped to 10_C or below. If not, a DTS

failure alarm is given and the defrost mode is operated using the return tempera-

ture sensor. The defrost mode will be terminated after one hour by the Controller.

AL61 Heaters Failure Alarm 61 is triggered by detection of improper amperage resulting from heater

activation or deactivation. Each phase of the power source is checked for proper

amperage.This alarm is a display alarm with no resulting failure action, and will

be reset by a proper amp draw of the heater.

AL62 Compressor Circuit

Failure

Alarm 62 is triggered by improper current draw increase (or decrease) resulting

from compressor turn on (or off). The compressor is expected to draw a mini-

mum of 2 amps; failure to do so will activate the alarm. This is a display alarm

with no associated failure action and will be reset by a proper amp draw of the

compressor.

AL63 Current Over Limit

Alarm 63 is triggered by the current limiting system. If the compressor is ON

and current limiting procedures cannot maintain a current level below the user

selected limit, the current limit alarm is activated. This alarm is a display alarm

and is inactivated by power cycling the unit, changing the current limit via the

code select Cd32, or if the current decreases below the activation level.

AL64 Discharge Tempera-

ture Over Limit Alarm 64 is triggered if the discharge temperature sensed is outside the range of

-- 6 0 _C(--76_F) to 175_C (347_F), or if the sensor is out of range. This is a dis-

play alarm and has no associated failure action.

AL65 Discharge Pressure

Transducer Failure Alarm 65 is triggered if a compressor discharge transducer is out of range. This is

a display alarm and has no associated failure action.

AL66 Suction Pressure

Transducer Failure Alarm 66 is triggered if a suction pressure transducer is out of range. This is a

display alarm and has no associated failure action.

AL67 Humidity Sensor

Failure Alarm 67 is triggered by a humidity sensor reading outside the valid range of 0%

to 100% relative humidity. If alarm AL67 is triggered when the dehumidification

mode is activated, then the dehumidification mode will be deactivated.

AL69 Suction Temperature

Sensor Failure Alarm 69 is triggered by a suction temperature sensor reading outside the valid

range of --60_C(--76_F) to 150_C (302_F). This is a display alarm and has no

associated failure action.

3-20T-309

Table 3-6 Controller Alarm Indications (Sheet 4 of 4)

NOTE

If the Controller is configured for four probes without a DataCORDER, the DataCORDER alarms AL70

and AL71 will be processed as Controller alarms AL70 and AL71. Refer to Table 3-10.

The Controller performs self-check routines. if an internal failure occurs, an

“ERR” alarm will appear on the display. This is an indication the Controller

needs to be replaced.

ERROR DESCRIPTION

ERR 0 -- RAM failure Indicates that the Controller working memory has

failed.

ERR Internal

EER 1 -- Program

Memory failure Indicates a problem with the Controller program.

croprocessor

Failure EER 2 -- Watchdog

time--out The Controller program has entered a mode whereby

the Controller program has stopped executing.

EER 3 -- On board timer

failure The on board timers are no longer operational.

Timed items such as; defrost, etc. may not work.

EER 4 -- Internal counter

failure Internal multi-purpose counters have failed. These

counters are used for timers and other items.

EER 5 -- A-D failure The Controller’s Analog to Digital (A-D) converter

has failed.

Entr

StPt Enter Setpoint

(Press Arrow &

Enter) The Controller is prompting the operator to enter a set point.

Low Main Voltage

(Function Codes

Cd27--38 disabled

and NO alarm

stored.)

This message will be alternately displayed with the set point whenever the sup-

ply voltage is less than 75% of its proper value.

3-21 T-309

Table 3-7 Controller Pre-Trip Test Codes (Sheet 1 of 4)

Code

No. TITLE DESCRIPTION

NOTE

“Auto” or “Auto1” menu includes the: P0, P1, P2, P3, P4, P5, P6 and rSLts. “Auto2” menu

includes P0, P1, P2, P3, P4, P5, P6, P7, P8, P9, P10 and rSLts.

P0--0 Pre-Trip Initiated All lights and display segments will be energized for five seconds at the start of

the pre-trip. Since the unit cannot recognize lights and display failures, there are

no test codes or results associated with this phase of pre-trip.

P1-0 Heaters Turned On Setup: Heater must start in the OFF condition, and then be turned on. A current

draw test is done after 15 seconds.

Pass/Fail Criteria: Passes if current draw change is within the range specified.

P1-1 Heaters Turned Off Setup: Heater must start in the ON condition, and then be turned off. A current

draw test is done after 10 seconds.

Pass/Fail Criteria: Passes if current draw change is within the range specified.

P2-0 Condenser Fan On Requirements: Water pressure switch or condenser fan switch input must be

closed.

Setup: Condenser fan is turned ON, a current draw test is done after 15 seconds.

Pass/Fail Criteria: Passes if current draw change is within the range specified.

P2-1 Condenser Fan Off Setup: Condenser fan is turned OFF, a current draw test is done after 10 sec-

onds.

Pass/Fail Criteria: Passes if current draw change is within the range specified.

P3 Low Speed Evapora-

tor Fans Requirements: The unit must be equipped with a low speed evaporator fan, as

determined by the Evaporator Fan speed select configuration variable.

P3-0 Low Speed Evapora-

tor Fan Motors On

Setup: The high speed evaporator fans will be turned on for 10 seconds, then off

for two seconds, then the low speed evaporator fans are turned on. A current

draw test is done after 60 seconds.

Pass/Fail Criteria: Passes if change in current draw is within the range speci-

fied. Fails if AL11 or AL12 activates during test.

P3-1 Low Speed Evapora-

tor Fan Motors Off

Setup: The low speed Evaporator Fan is turned off, a current draw test is done

after 10 seconds.

Pass/Fail Criteria: Passes if change in current draw is within the range speci-

fied. Fails if AL11 or AL12 activates during test.

P4-0 High Speed Evapo-

rator Fan Motors On

Setup: The high speed Evaporator Fan is turned on, a current draw test is done

after 60 seconds.

Pass/Fail Criteria: Passes if change in current draw is within the range speci-

fied. Fails if AL11 or AL12 activates during test.

P4-1 High Speed Evapo-

rator Fan Motors Off

Setup: The high speed Evaporator Fan is turned off, a current draw test is done

after 10 seconds.

Pass/Fail Criteria: Passes if change in current draw is within the range speci-

fied. Fails if AL11 or AL12 activates during test.

P5-0 Supply/Return Probe

Test

Setup: The High Speed Evaporator Fan is turned on and run for eight minutes,

with all other outputs de-energized.

Pass/Fail Criteria: A temperature comparison is made between the return and

supply probes.

NOTE

If this test fails, “P5-0” and “FAIL” will be displayed. If both Probe tests

(this test and the PRIMARY/ SECONDARY) pass, the display will read

“P5” “PASS.”

3-22T-309

Table 3-7 Controller Pre-Trip Test Codes (Sheet 2 of 4)

P5-1 Supply Probe Test

Requirements: For units equipped with secondary supply probe only.

Pass/Fail Criteria: The temperature difference between primary and secondary probe

(supply) is compared.

NOTE

Ifthistestfails,“P5-1”andFAILwillbedisplayed.IfbothProbetests(this

and the SUPPLY/ RETURN TEST)pass, because of the multiple tests,the

display will read ’P 5’ ’PASS’.

P5-2 Return Probe Test

Requirements: For units equipped with secondary return probe only.

Pass/Fail Criteria: The temperature difference between primary and secondary

probe (return) is compared.

NOTES

1. If this test fails, “P5-2” and“FAIL” will be displayed. Ifboth Probetests

(this test and the SUPPLY/ RETURN) pass, because of the multiple

tests, the display will read “P 5,” “PASS.”

2. The results of Pre-Trip tests 5-0, 5-1 and 5-2 will be used to activate or

clear control probe alarms.

P6 Refrigerant Probes,

Compressor

and

Refrigeration valves

Setup: The system is operated through a sequence of events to test the compo-

nents. The sequence is: Step 1, de--energize all outputs; Step 2, start unit with

unloader valve open. Open then close the suction modulation valve. Monitor

suction pressure; Step 3, open suction modulation valve to a known position;

Step 4, close suction modulation valve to a know position; Step 5, open econo-

mizer valve; Step 6, close unloader valve; Step 7, open unloader valve; Step 8,

close economizer valve; Step 9, de--energize all outputs.

P6-0 Discharge

Thermistor Test If alarm 64 is activated any time during the first 45 second period of Step 1, the

test fails.

P6-1 Suction

Thermistor Test If alarm 69 is activated any time during the first 45 second period of Step 1, the

test fails.

P6-2 Discharge Pressure

Sensor Test If alarm 65 is activated any time during the first 45 second period of Step 1, the

test fails.

P6-3 Suction Pressure

Sensor Test If alarm 66 is activated any time during the first 45 second period of Step 1, the

test fails.

P6-4 Compressor Current

Draw Test Compressor current is tested before and after start up. If current does not in-

crease, the test fails.

P6-5 Suction Modulation

Valve Test Suction pressure is measured before and after the valve opens. If suction pres-

sure does not increase, the test fails.

P6-6 Economizer

Valve Test Suction pressure is measured during Steps 4 and 5. If suction pressure does not

increase, the test fails.

P6-7 Unloader Valve Test Suction pressure is measured during Steps 6 and 7. If suction pressure does not

increase, the test fails.

3-23 T-309

Table 3-7 Temperature Controller Pre-Trip Test Codes (Sheet 3 of 4)

NOTE

P7-0 through P10 are included with the “Auto2” only.

P7-0 High Pressure

NOTE

This test is skipped if the sensed ambient temperature is less than 7_C

(45_F), the return air temperature is less than --17.8_C(0_F), the water

pressure switch is open or the condenser fan switch is open.

Switch Closed Setup: With the unit running, the condenser fan is de-energized, and a 15 minute

timer is started.

Pass/Fail Criteria: The test fails if high pressure switch fails to open in 15 min-

utes.

P7-1 High Pressure

Switch Open

Requirements: Test P7-0 must pass for this test to execute. Setup: The con-

denser fan is started and a 60 second timer is started.

Pass/Fail Criteria: Passes the test if the high pressure switch (HPS) closes

within the 60 second time limit, otherwise, it fails.

P8-0 Perishable Mode

Heat Test

Setup: If the container temperature is below 15.6°C(60_F), the set point is

changed to 15.6°C, and a 180 minute timer is started. The left display will read

“P8-0.” The control will then heat the container until 15.6°C is reached. If the

container temperature is above 15.6°C at the start of the test, then the test pro-

ceeds immediately to test P8-1 and the left display will change to “P8-1.”

Pass/Fail Criteria: The test fails if the 180 minute timer expires before the con-

trol temperature reaches set point. The display will read “P8-0,” “FAIL.”

P8-1 Perishable Mode

Pull Down Test

Requirements: Control temperature must be at least 15.6°C(60_F).

Setup: The set point is changed to 0°C(32_F), and a 180 minute timer is

started. The left display will read “P8-1,” the right display will show the supply

air temperature. The unit will then start to pull down the temperature to the 0°C

set point.

Pass/Fail Criteria: The test passes if the container temperature reaches set point

before the 180 minute timer expires.

P8-2 Perishable Mode

Maintain Tempera-

ture Test

Requirements: Test P8-1 must pass for this test to execute. This test is skipped

if the DATAcorder is not configured or available.

Setup: The left display will read “P8-2,” and the right display will show the sup-

ply air temperature. A two hour timer is started. The unit will be required to

maintain the temperature to within + or -- 0.5_C (0.9_F) of set point until a Da-

taCORDER recording is executed. The recorder supply probe temperature run-

ning total (and its associated readings counter) will be zeroed out for the remain-

der of the recording period at the start of this test, so that the actual value

recorded in the DataCORDER will be an average of only this test’s results. Once

a recording interval is complete, the average recorder supply temperature will be

recorded in the DataCORDER, as well as stored in memory for use in applying

the test pass/fail criteria.

Pass/Fail Criteria: If the recorded temperature is within +/-- 0.5_C. of set point

from test start to DataCORDER recording, the test passes. If the average temper-

ature is outside of the tolerance range at the recording, the test fails and will

auto--repeat by starting P8--0 over.

P9-0 Defrost Test

Setup: The defrost temperature sensor (DTS) reading will be displayed on the

left display. The right display will show the supply air temperature. The unit will

run FULL COOL for 30 minutes maximum until the DTT is considered closed.

Once the DTT is considered closed, the unit simulates defrost by running the

heaters for up to two hours, or until the DTT is considered open.

Pass/Fail Criteria: The test fails if: the DTT is not considered closed after the

30 minutes of full cooling, HTT opens when DTT is considered closed or if re-

turn air temperature rises above 49/50_C (120/122_F).

3-24T-309

Table 3-7 Controller Pre-Trip Test Codes (Sheet 4 of 4)

P10-0 Frozen Mode

Heat Test

Setup: If the container temperature is below 7.2_C(45_F), the set point is

changedto7.2_C and a 180 minute timer is started. The control will then be

placed in the equivalent of normal heating. If the container temperature is above

7.2_C at the start of the test, then the test proceeds immediately to test 10--1.

During this test, the control temperature will be shown in the right display.

Pass/Fail Criteria: The test fails if the 180 minute timer expires before the con-

trol temperate reaches set point --0.3_C (0.17_F). If the test fails it will not auto--

repeat. There is no pass display for this test, once the control temperature reaches

set point, the test proceeds to test 10--1

P10-1 Frozen Mode Pull

Down Test

Requirements: Control temperature must be at least 7.2_C(45_F)

Setup: The set point is changed to --17.8_C(0_F). The system will then attempt

to pull don the Control temperature to set point using normal frozen mode cool-

ing. During this test, the control temperate will be shown on the right display

Pass/Fail Criteria: If the control temperature does not reach set point --0.3_C

(0.17_F) before the 180 minute timer expires the test fails and will auto--repeat

by starting P10--0 over..

P10-2 Frozen Mode

Maintain

Temperature Test

Requirements: Test P10-1 must pass for this test to execute. This test is skipped

if the DATAcorder is not configured or available.

Setup: During this test, the left display will read “P10-2,” and the right display

will show the supply air temperature. A two hour timer is started. The unit will

be required to maintain the temperature to within + 0.5_C (0.9_F)/--1.3_C

(2.3_F) of set point until a DataCORDER recording is executed. The recorder

supply probe temperature running total (and its associated readings counter) will

be zeroed out for the remainder of the recording period at the start of this test, so

that the actual value recorded in the DataCORDER will be an average of only

this test’s results. Once a recording interval is complete, the average recorder

supply temperature will be recorded in the DataCORDER, as well as stored in

memory for use in applying the test pass/fail criteria.

Pass/Fail Criteria: If the recorded temperature is within +0.5_C (0.9_F)/--1.3_C

(2.3_F) of set point from test start to DataCORDER recording, the test passes. If

the average temperature is outside of the tolerance range at the recording, the test

fails and will auto--repeat by starting P10--0 over.

3-25 T-309

Table 3-8 DataCORDER Function Code Assignments

NOTE

Inapplicable Functions Display “-- -- -- -- --”

To Access: Press ALT. MODE key

Code

No. TITLE DESCRIPTION

dC1 Recorder Supply

Temperature Current reading of the supply recorder sensor.

dC2 Recorder Return

Temperature Current reading of the return recorder sensor.

dC3-5 USDA 1,2,3 Tem-

peratures Current readings of the three USDA probes.

dC6-13 Network Data

Points 1-8 Current values of the network data points (as configured). Data point 1 (Code

6) is generally the humidity sensor and its value is obtained from the Control-

ler once every minute.

dC14 CargoProbe4Tem-

perature Current reading of the cargo probe #4.

dC15-19 Future Expansion These codes are for future expansion, and are not in use at this time.

dC20-24 Temperature Sensors

1-5 Calibration Current calibration offset values for each of the five probes: supply, return,

USDA #1, #2, and #3. These values are entered via the interrogation pro-

gram.

dC25 Future Expansion This code is for future expansion, and is not in use at this time..

dC26,27 S/N, Left 4, Right 4 The DataCORDER serial number consists of eight characters. Function code

dC26 contains the first four characters. Function code dC27 contains the last

four characters. (This serial number is the same as the Controller serial num-

ber)

dC28 Minimum Days Left An approximation of the number of logging days remaining until the Data-

CORDER starts to overwrite the existing data.

dC29 Days Stored Number of days of data that are currently stored in the DataCORDER.

dC30 Date of last Trip

start The date when a Trip Start was initiated by the user. In addition, if the system

goes without power for seven continuous days or longer, a trip start will auto-

matically be generated on the next AC power up.

dC31 Battery Test Shows the current status of the optional battery pack.

PASS: Battery pack is fully charged.

FAIL: Battery pack voltage is low.

dC32 Time: Hour, Minute Current time on the real time clock (RTC) in the DataCORDER.

dC33 Date: Month, Day Current date (month and day) on the RTC in the DataCORDER.

dC34 Date: Year Current year on the RTC in the DataCORDER.

dC35 Cargo Probe 4

Calibration Current calibration value for the Cargo Probe. This value is an input via the

interrogation program.

3-26T-309

Table 3-9 DataCORDER Pre-Trip Result Records

Test

No. TITLE DATA

1-0 Heater On Pass/Fail/Skip Result, Change in current for Phase A, B and C

1-1 Heater Off Pass/Fail/Skip Result, Change in currents for Phase A, B and C

2-0 Condenser Fan On Pass/Fail/Skip Result, Water pressure switch (WPS) -- Open/Closed,

Change in currents for Phase A, B and C

2-1 Condenser Fan Off Pass/Fail/Skip Result, Change in currents for Phase A, B and C

3-0 Low Speed Evaporator Fan

On Pass/Fail/Skip Result, Change in currents for Phase A, B and C

3-1 Low Speed Evaporator Fan

On Pass/Fail/Skip Result, Change in currents for Phase A, B and C

4-0 High Speed Evaporator Fan

On Pass/Fail/Skip Result, Change in currents for Phase A, B and C

4-1 High Speed Evaporator Fan

On Pass/Fail/Skip Result, Change in currents for Phase A, B and C

5-0 Supply/Return Probe Test Pass/Fail/Skip Result, STS, RTS, SRS and RRS

5-1 Secondary Supply Probe Test Pass/Fail/Skip

5-2 Secondary Return Probe Test Pass/Fail/Skip

6-0 Discharge Thermistor Test Pass/Fail/Skip

6-1 Suction Thermistor Test Pass/Fail/Skip

6-2 Discharge Pressure Sensor

Test Pass/Fail/Skip

6-3 Suction Pressure Sensor Test Pass/Fail/Skip

6-4 Compressor Current Draw

Test Pass/Fail/Skip

6-5 Suction Modulation valve Test Pass/Fail/Skip

6-6 Economizer Valve Test Pass/Fail/Skip

6-7 Unloader Valve Test Pass/Fail/Skip

7-0 High Pressure Switch Closed Pass/Fail/Skip Result, AMBS, DPT or CPT (if equipped)

Input values that component opens

7-1 High Pressure Switch Open Pass/Fail/Skip Result, STS, DPT or CPT (if equipped)

Input values that component closes

8-0 Perishable Mode Heat Test Pass/Fail/Skip Result, STS, time it takes to heat to 16_C(60_F)

8-1 Perishable Mode Pull Down

Test Pass/Fail/Skip Result, STS, time it takes to pull down to 0_C(32_F)

8-2 Perishable Mode Maintain

Test Pass/Fail/Skip Result, Averaged DataCORDER supply temperature

(SRS) over last recording interval.

9-0 Defrost Test Pass/Fail/Skip Result, DTS reading at end of test, line voltage, line

frequency, time in defrost.

10-0 Frozen Mode Heat Test Pass/Fail/Skip Result, STS, time unit is in heat.

10-1 Frozen Mode Pull Down Test Pass/Fail/Skip Result, STS, time to pull down unit to --17.8_C(0_F).

10-2 Frozen Mode Maintain Test Pass/Fail/Skip Result, Averaged DataCORDER return temperature

(RRS) over last recording interval.

3-27 T-309

Table 3-10 DataCORDER Alarm Indications

To Access: Press ALT. MODE key

Code No. TITLE DESCRIPTION

dAL70 Recorder Supply

Temperature Out of

Range

The supply recorder sensor reading is outside of the range of --50_Cto

70_C(--58_F to +158_F) or, the probe check logic has determined there is

a fault with this sensor.

NOTE

The P5 Pre-Trip test must be run to inactivate the alarm.

dAL71 Recorder Return Tem-

perature Out of Range

The return recorder sensor reading is outside of the range of --50_Cto

70_C(--58_F to +158_F) or, the probe check logic has determined there is

a fault with this sensor.

NOTE

The P5 Pre-Trip test must be run to inactivate the alarm.

dAL72-74 USDA Temperatures

1, 2, 3 Out of Range The USDA probe temperature reading is sensed outside of --50 to 70°C

(--58to158°F) range.

dAL75 Cargo Probe 4 Out of

Range The cargo probe temperature reading is outside of --50 to 70°C(--58to

158°F) range.

dAL76, 77 Future Expansion These alarms are for future expansion, and are not in use at this time.

dAL78-85 Network Data Point

1 -- 8 Out of Range

The network data point is outside of its specified range. The DataCORD-

ER is configured by default to record the supply and return recorder sen-

sors. The DataCORDER may be configured to record up to 8 additional

network data points. An alarm number (AL78 to AL85) is assigned to

each configured point. When an alarm occurs, the DataCORDER must be

interrogated to identify the data point assigned. When a humidity sensor is

installed, it is usually assigned to AL78.

dAL86 RTC Battery Low The Real Time Clock (RTC) backup battery is too low to adequately

maintain the RTC reading.

dAL87 RTC Failure An invalid date or time has been detected. This situation may be corrected

by changing the Real Time Clock (RTC) to a valid value using the Data-

View.

dAL88 DataCORDER

EEPROM Failure A write of critical DataCORDER information to the EEPROM has failed.

dAL89 Flash Memory Error An error has been detected in the process of writing daily data to the non-

volatile FLASH memory.

dAL90 Future Expansion This alarm is for future expansion, and is not in use at this time.

dAL91 AlarmListFull The DataCORDER alarm queue is determined to be full (eight alarms).

T-309

4-1

SECTION 4

OPERATION

4.1 INSPECTION (Before Starting)

WARNING

Beware of unannounced starting of the

evaporator and condenser fans. The unit

may cycle the fans and compressor unex-

pectedly as control requirements dictate.

a. Ifcontainer is empty, check insidefor the following:

1. Check channels or “T” bar floor for cleanliness.

Channels must be free of debris for proper air cir-

culation.

2. Checkcontainerpanels,insulationanddoorsealsfor

damage. Effect permanent or temporary repairs.

3. Visuallycheckevaporatorfanmotormountingbolts

for proper securement (refer to paragraph 6.17).

4. Checkfordirtorgreaseonevaporatorfanorfandeck

and clean if necessary.

5. Check evaporator coil for cleanliness or obstruc-

tions. Wash with fresh water.

6. Checkdefrostdrainpansanddrainlinesforobstruc-

tions and clear if necessary. Wash with fresh water.

7. Checkpanelsonrefrigerationunitforlooseboltsand

condition of panels. Make sure T.I.R. devices arein

place on access panels.

b. Check condenser coil for cleanliness. Wash with

fresh water.

c. Open control box door. Check for loose electrical

connections or hardware.

d. Check color of moisture-liquid indicator.

e. Check oil level in compressor sight glass.

4.2 CONNECT POWER

WARNING

Do not attempt to remove power plug(s) be-

fore turning OFF start-stop switch (ST),

unit circuit breaker(s) and external power

source.

WARNING

Makesurethepowerplugsarecleananddry

before connecting to any power receptacle.

4.2.1 Connection To 380/460 vac Power

1. Make sure start-stop switch (ST, on control panel)

and circuit breaker (CB-1, in the control box) are in

position “0” (OFF).

2. Plug the 460 vac (yellow) cable into a de-energized

380/460 vac, 3-phase power source. Energize the

power source. Place circuit breaker (CB-1) in posi-

tion “I” (ON). Close and secure control box door.

4.3 ADJUST FRESH AIR MAKEUP VENT

The purpose of the fresh air makeup vent is to provide

ventilation for commodities that require fresh air

circulation. The vent must be closed when transporting

frozen foods.

Air exchange depends on static pressure differential,

whichwillvarydependingonthecontainerandhowthe

container is loaded.

4.3.1 Upper Fresh Air Makeup Vent

Two slots and a stop are designed into the disc for air

flowadjustments.Thefirstslotallowsfora0to30%air

flow, and the second slot allows for a 30 to 100% air

flow. To adjust the percentage of air flow, loosen the

wingnutandrotatethediscuntilthedesiredpercentage

of air flow matches with the arrow. Tighten the wing

nut. To clear the gap between the slots,loosen thewing

nut until the disc clears the stop. Figure 4-1 gives air

exchange values for an empty container. Higher values

can be expected for a fully loaded container.

120

150

180

210

240

0 102030405060708090100

AIR

FLOW

(CMH)

1-!/2”

PERCENT OPEN

69NT FRESH AIR MAKEUP

T-BAR

2-%/8”

3”

T-BAR

ZERO EXTERNAL STATIC 50HZ

For 60HZ operation multiply curves by 1.2

Figure 4-1 Make Up Air Flow Chart

T-309 4-2

4.4 CONNECT REMOTE MONITORING

RECEPTACLE

If remote monitoring is required, connect remote

monitorplugatunitreceptacle.(Seeitem9,Figure 2-5.)

When the remote monitor plug is connected to the

remote monitoring receptacle, the following remote

circuits are energized:

CIRCUIT FUNCTION

Sockets B to A Energizes remote cool light

Sockets C to A Energizes remote defrost light

Sockets D to A Energizes remote in-range light

4.5 STARTING AND STOPPING INSTRUCTIONS

WARNING

Make sure that the unit circuit breaker(s)

(CB-1 & CB-2) and the START-STOP

switch(ST)areinthe“O”(OFF)positionbe-

fore connecting to any electrical power

source.

4.5.1 Starting the Unit

1. Withpowerproperlyapplied,thefreshairdamperset

and (if required) the water cooled condenser con-

nected, (refer to paragraphs 4.2 & 4.3) place the

START-STOP switch to “I” (ON).

NOTE

Withinthefirst30secondstheelectronicphase

detection system will check for proper com-

pressor rotation. If rotation is not correct, the

compressorwill be stopped and restarted inthe

oppositedirection.Ifthecompressorisproduc-

ing unusually loud and continuous noise after

the first 30 seconds of operation, stop the unit

and investigate.

2. Continue with Start Up Inspection, paragraph 4.6.

4.5.2 Stopping the Unit

To stop the unit, place the START-STOP switch in

position “0” (OFF).

4.6 START--UP INSPECTION

4.6.1 Physical Inspection

a. Check rotation of condenser and evaporator fans.

b. Checkcompressor oillevel. (Refer to paragraph6.9.)

4.6.2 Check Controller Function Codes

Check and, if required, reset controller Function Codes

(Cd27 through Cd39) in accordance with desired

operating parameters. Refer to paragraph 3.2.2.

DataCORDER

a. Check and, if required, set the DataCORDER Con-

figuration in accordance with desired recording pa-

rameter. Refer to paragraph 3.6.3.

b. Enter a “Trip Start”. To enter a “trip Start”, do the

following:

1. Depress the ALT MODE key and scroll to Code

dC30.

2. Depress and hold the ENTER key for five seconds.

3. The “Trip Start” event will be entered in the Data-

CORDER.

4.6.3 Complete Inspection

Allow unit to run for 5 minutes to stabilize conditions

andperform apre--trip diagnosisinaccordancewiththe

following paragraph.

4.7 PRE-TRIP DIAGNOSIS

CAUTION

Pre-tripinspectionshouldnotbeperformed

with critical temperaturecargoes in thecon-

tainer.

CAUTION

When Pre-Trip key is pressed, economy, de-

humidification and bulb mode will be deac-

tivated. AtthecompletionofPre-Tripactivi-

ty, economy, dehumidification and bulb

mode must be reactivated.

Pre-Trip diagnosis provides automatic testing of the

unit components using internal measurements and

comparison logic. The program will provide a “PASS”

or “FAIL” display to indicate test results.

The testing begins with access to a pre-trip selection

menu. Theuser mayhavetheoption of selecting oneof

two automatic tests. These tests will automatically

perform a series of individual pre--trip tests. The user

may also scroll down to select any of the individual

tests.Whenonlytheshortsequenceisconfigureditwill

appear as “AUtO” in the display, otherwise “AUtO1”

will indicate the short sequence and “AUtO2” will

indicatethelongsequence.Thetestshortsequencewill

runtestsP0 throughP6. Thelongtestsequencewillrun

tests P0 through P10.

A detailed description ofthe pre-trip test codes is listed

in Table 3-7, page 3-21. If no selection is made, the

pre-trip menu selection process will terminate

automatically. However, dehumidification and bulb

mode must be reactivated manually if required.

Scrolling down to the “rSLts” code and pressing

ENTER will allow the userto scroll through theresults

ofthelastpre--triptestingrun.Ifnopre--testinghasbeen

run(oranindividualtesthasnotbeenrun)sincetheunit

was powered up “--------” will be displayed.

To start a pre--trip test, do the following:

NOTE

1. Priortostartingtests,verifythatunitvoltage

(Function Code Cd 07) is within tolerance

and unit amperage draw (Function Codes

Cd04, Cd05, Cd06) are within expected

limits. Otherwise, tests may fail incorrectly.

2. All alarms must be rectified and cleared

before starting tests.

T-309

4-3

3. Pre-trip may also be initiated via

communications. The operation is thesame

asforthekeypadinitiationdescribedbelow

except that should a test fail, the pre-trip

mode will automatically terminate. When

initiatedviacommunications,atestmaynot

be interrupted with an arrow key, but the

pre-trip mode can be terminated with the

PRE-TRIP key.

a. Press the PRE-TRIP key. This accesses a test selec-

tion menu.

b. TO RUN AN AUTOMATIC TEST: Scroll through

the selections by pressing the UP ARROW or

DOWNARROWkeystodisplayAUTO,AUTO1or

AUTO 2 as desired and then press the AUTO key.

1. The unit will execute the series of tests without any

need for direct user interface. These tests vary in

length, depending on the component under test.

2. Whiletestsarerunning,“P#-#”willappearontheleft

display, where the #’s indicate the test number and

sub-test. The right display will show a countdown

time in minutes and seconds, indicating how much

time there is left remaining in the test.

CAUTION

When a failure occurs during automatic

testing the unit will suspend operation

awaiting operator intervention.

Whenanautomatictestfails,itwillberepeatedonce.

Arepeatedtestfailurewillcause“FAIL”tobeshown

ontherightdisplay,withthecorrespondingtestnum-

ber to the left. The user may then press the DOWN

ARROWtorepeatthetest,theUPARROWtoskipto

the next test or the PRE--TRIP key to terminate test-

ing. The unit will wait indefinitely, until the user

manually enters a command.

CAUTION

When Pre--Trip test Auto 2 runs to comple-

tion without being interrupted, the unit will

terminate pre-trip and display “Auto 2”

“end.”Theunitwillsuspendoperationuntil

the user depresses the ENTER key!

WhenanAuto1runstocompletionwithoutafailure,

theunit will exit thepre-tripmode, andreturn tonor-

mal control operation. However, dehumidification

and bulb mode must be reactivated manually if re-

quired.

c. TO RUN AN INDIVIDUAL TEST: Scroll through

the selections by pressing the UP ARROW or

DOWN ARROW keys to display an individual test

code. Pressing ENTER when the desired test code is

displayed.

1. Individually selected tests, other than the LED/Dis-

play test, will perform the operations necessary to

verify the operation of the component. At the con-

clusion, PASS or FAILwill bedisplayed. Thismes-

sage will remain displayed for up to three minutes,

during which time a user may select another test. If

the three minute time period expires, the unit will

terminate pre-trip and return to control mode opera-

tion.

2. While the tests are being executed, the user may ter-

minatethepre-tripdiagnosticsbypressingandhold-

ing the PRE-TRIP key. The unit will then resume

normal operation. If the user decides to terminate a

test but remain at the test selection menu, the user

may press the UP ARROW key. When this is done

all test outputs will be de-energized and the test

selection menu will be displayed.

3. Throughout the duration of any pre-trip test except

the P-7 high pressure switch tests, the current and

pressure limiting processes are active .

d. Pre-Trip Test Results

At the end of the pre-trip test selection menu, the

message “P,” “rSLts” (pre--trip results) will be

displayed. Pressing theENTER key will allow the user

toseetheresultsforall subtests(i.e., 1-0, 1-1, etc).The

resultswillbedisplayedas“PASS”or“FAIL”forallthe

tests run to completion since power up. If a test has not

beenrunsincepowerup, “-- -- -- -- --”willbedisplayed.

Once all pre--test activity is completed,

dehumidification and bulb mode must be reactivated

manually if required.

4.8 OBSERVE UNIT OPERATION

4.8.1 Probe Check

IftheDataCORDERisofforinalarmthecontrollerwill

revert to a four probe configuration which includes the

DataCORDER supply and return air probes as the

secondary controller probes. The controller

continuously performs probe diagnosis testing which

compares the four probes. If the probe diagnosis result

indicates a probe problem exists, the controller will

perform a probe check to identify the probe(s) in error.

a. Probe Diagnostic Logic -- Standard

Iftheprobecheckoption(controllerconfigurationcode

CnF31) is configured for standard, the criteria used for

comparisonbetweentheprimaryandsecondarycontrol

probes is:

1_C(1.8_F)forperishablesetpointsor2_C(3.6_F)

for frozen set points.

If25ormoreof30readingstakenwithina30minute

periodareoutside ofthe limit, then adefrost is initi-

ated and a probe check is performed.

Inthis configuration, aprobecheckwill be run as apart

of every normal (time initiated) defrost.

b. Probe Diagnostic Logic -- Special

If the probe check option is configured for special the

abovecriteriaareapplicable.Adefrostwithprobecheck

will be initiated if 25 of 30 readings or 10 consecutive

readings are outside of the limits

In this configuration, a probe check will not be run as a

part of a normal defrost, but only as a part of a defrost

initiated due to a diagnostic reading outside of the

limits.

c.The30minutetimerwillberesetateachofthefollow-

ing conditions:

T-309 4-4

1. At every power up.

2. At the end of every defrost.

3. After every diagnostic check that does not fall out-

side of the limits as outlined above.

d. Probe Check

A defrost cycle probe check is accomplished by

energizing just the evaporatormotors for eight minutes

at the end of the normal defrost. At the endof the eight

minute period the probes will be compared to a set of

predetermined limits. The defrost indicator will remain

on throughout this period.

Any probe(s) determined to be outside the limits will

cause the appropriate alarm code(s) to be displayed to

identify which probe(s) needs to be replaced. The P5

Pre-Trip test must be run to inactivate alarms.

4.9 SEQUENCE OF OPERATION

General operation sequences for cooling, heating and

defrost are provided in the following subparagraphs.

Schematic representation of controller action are

provided in Figure 4-2 and Figure 4-3.Referto Section 3

for detailed descriptions of special events and timers

thatareincorporatedbythecontrollerinspecificmodes

of operation.

SET POINT

PULL DOWN RISING

TEMPERATURE

-- 0 . 5 _C

(0.9_F)

--0.20_C

+.20_C

HEATING

AIR CIRCULATION

+2.5_C

(4.5_F)

UNLOADED OPERATION

MODULATED

COOLING

UNLOADED

AIR CIRCULATION

SET POINT

+.20_C

HEATING

+2.5_C

(4.5_F)

FALLING

TEMPERATURE

MODULATED

COOLING

UNLOADED

-- 0 . 5 _C

(0.9_F)

AIR CIRCULATION

NOTE: TEMPERATURES INDICATIONS ARE ABOVE OR BELOW SET POINT

START UNLOADED,

TRANSITION TO

ECONOMIZED

OPERATION

--0.20_C

Figure 4-2 Controller Operation -- Perishable Mode

T-309

4-5

SET POINT

FALLING

TEMPERATURE RISING

TEMPERATURE

--0.20_C

+.20_C

COOLING

ECONOMIZED

AIR CIRCULATION

START UNLOADED,

TRANSITION TO

ECONOMIZED

OPERATION

NOTE: TEMPERATURES INDICATIONS ARE ABOVE OR BELOW SET POINT

AIR CIRCULATION

Figure 4-3 Controller Operation -- Frozen Mode

CONTROL TRANSFORMER

POWER TO

CONTROLLER

SIGNAL TO

CONTROLLER

ENERGIZED

DE--ENERGIZED

FOR FULL DIAGRAM AND

LEGEND, SEE SECTION 7

NOTE: HIGH SPEED EVAPORATOR FAN SHOWN. FOR LOW SPEED

CONTACT TE IS DE--ENERGIZED AND CONTACT TV IS ENERGIZED

TD T6 PA PB

T6 PB PA

USV

ESV

Figure 4-4 Perishable Mode

4.9.1 Sequence Of operation -- Compressor Phase

Sequence

The controller logic will check for proper compressor

rotation. If the compressor is rotating in the wrong

direction, the controller will energize or de--energize

relay T6 as required (see Figure 4-4). Energizing relay

T6willswitchoperationfromcompressorcontactorPA

to compressor contactor PB. De--energizing relay T6

will switch operation from compressorcontactor PB to

compressorcontactorPA. Compressorcontactors PA is

wired to run the compressor on L1, L2, and L3.

Compressor contactor PB is wired to run the

compressor on L2, L1 and L3 thus providing reverse

rotation .

4.9.2 Sequence Of Operation -- Perishable Mode

Cooling

NOTE

Inthe Conventional PerishableMode ofopera-

tiontheevaporatormotorsruninhighspeed.In

the Economy Perishable Modethe fan speed is

varied.

a. With supply air temperature above set point and de-

creasing, the unit will be cooling with the condenser

fanmotor(CF), compressormotor (PAor PB),evap-

oratorfanmotors(EF)energizedandtheCOOLlight

illuminated. (See Figure 4-4.) Also, if current or

pressure limiting is not active, thecontroller will en-

ergize relay TS to open the economizer solenoid

valve (ESV) and placethe unit in economizedopera-

tion.

b. When the air temperature decreases to a predeter-

mined tolerance aboveset point, the in-range light is

illuminated.

c. As the air temperature continues to fall, modulating

cooling starts at approximately 2.5_C (4.5_F) above

set point. (See Figure 4-2.) At set point, relay TS is

de--energized to close the economizer solenoid valve

and relay TU is energized to open the unolader sole-

T-309 4-6

noid valve changing from economized operation to

unloaded operation. (As shown in Figure 4-5)

d. The controllermonitors thesupply air. Once thesup-

plyairfallsbelowsetpointthecontrollerperiodically

recordsthesupplyairtemperature,setpointandtime.

Acalculationisthenperformedto determinetemper-

ature drift from set point over time.

e. If thecalculation determinescooling is no longerre-

quired,contactsTDandTNareopenedtode-energize

compressormotorandcondenserfanmotor.Thecool

light is also de-energized.

f. Theevaporatorfanmotorscontinuetoruntocirculate

air throughout the container. The in-range light re-

mains illuminated as long as the supply air is within

tolerance of set point.

g. If the supply air temperature increases to 0.2_C

(0.4_F) aboveset point andthe threeminute off time

has elapsed, relays TD, TU and TN are energized to

restart the compressor and condenser fan motors in

unloaded operation. The cool light is also illumi-

nated.

CONTROL TRANSFORMER

POWER TO

CONTROLLER

SIGNAL TO

CONTROLLER

ENERGIZED

DE--ENERGIZED

FOR FULL DIAGRAM AND

LEGEND, SEE SECTION 7

NOTE: HIGH SPEED EVAPORATOR FAN SHOWN. FOR LOW SPEED

CONTACT TE IS DE--ENERGIZED AND CONTACT TV IS ENERGIZED

TD T6 PA PB

T6 PB PA

USV

ESV

Figure 4-5 Perishable Mode Heating

4.9.3 Sequence Of Operation --

Perishable Mode Heating

a. If the air temperature decreases 0.5_C (0.9_F)below

set point, the system enters the heating mode. (See

Figure 4-2). The controller closes contacts TH (see

Figure 4-5)to allowpowerflowthroughthe heatter-

mination thermostat (HTT) to energize the heaters

(HR).TheHEATlightisalsoilluminated.Theevapo-

rator fans continue to run to circulate air throughout

the container.

b. When the temperature rises to 0.2_C (0.4_F) above

set point, contact TH opens to de--energize theheat-

ers.TheHEATlightisalsode--energized.Theevapo-

rator fans continue to run to circulate air throughout

the container.

c. A safety heater termination thermostat (HTT), at-

tached to an evaporator coil support, will open the

heating circuit if overheating occurs.

4.9.4 Sequence Of operation -- Frozen Mode Cool-

ing

a. With supply air temperature above set point and de-

creasing, theunit will transition to economized cool-

ing with the condenser fan motor (CF), compressor

motor (CH), economizer solenoid valve (ESV), low

speed evaporator fan motors (ES) energized and the

COOL light illuminated. (See Figure 4-6.)

b.When the air temperature decreases to a predeter-

mined tolerance aboveset point, the in-range light is

illuminated.

CONTROL TRANSFORMER

POWER TO

CONTROLLER

SIGNAL TO

CONTROLLER

ENERGIZED

DE--ENERGIZED

FOR FULL DIAGRAM AND

LEGEND, SEE SECTION 7

TD T6 PA PB

T6 PB PA

USV

ESV

Figure 4-6 Frozen Mode

c. When the return air temperature decreases to 0.2_C

(0.4_F) belowset point, contacts TD, TSand TNare

opened to de-energize the compressor, economizer

solenoid valve and condenser fan motors. The cool

light is also de-energized.

d. The evaporator fan motors continue to run in low

speed to circulate air throughout the container. The

in-range light remains illuminated as long as the re-

turn air is within tolerance of set point.

e. When return air temperature is 10_C(18_F) ormore

below set point, the evaporator fans are brought to

high speed.

f. When the return air temperature increases to 0.2_C

(0.4_F) aboveset point andthe threeminute off time

has elapsed, relays TD, TS and TN are energizes to

restartthecompressorandcondenserfanmotors.The

cool light is illuminated.

4.9.5 Sequence Of Operation -- Defrost

The defrost cycle may consist of up to three distinct

operations.Thefirstisde-icingofthecoil,thesecondis

a probe check cycle and the third is snap freeze.

T-309

4-7

Defrost may be initiated by any one of the following

methods:

1. The manual defrost switch (MDS) is closed by the

user.

2. The user sends a defrost command by communica-

tions.

3. The defrost interval timer (controller function code

Cd27) reaches the defrost interval set by the user.

4. The controller probe diagnostic logic determines

thataprobecheckisnecessarybasedonthetempera-

ture values currently reported by the supply and re-

turn probes.

5. If the controller is programmed with the Demand

Defrost option (Future) and theoption is set to“IN”

the unit will enter defrost if it has been in operation

for over 2.5 hours without reaching set point.

CONTROL TRANSFORMER

POWER TO

CONTROLLER

SIGNAL TO

CONTROLLER

ENERGIZED

DE--ENERGIZED

FOR FULL DIAGRAM AND

LEGEND, SEE SECTION 7

TD T6 PA PB

T6 PB PA

USV

ESV

Figure 4-7 Defrost

Defrost may be initiated any time the defrost

temperature sensor reading falls below the controller

defrost termination thermostat set point. Defrost will

terminate when the defrost temperature sensor reading

risesabovethedefrostterminationthermostatsetpoint.

The defrost termination thermostat is not a physical

component. It is a controller setting that acts as a

thermostat, “closing” (allowing defrost) when the

defrosttemperaturesensorreadingisbelowthesetpoint

and“opening”(terminatingorpreventingdefrost)when

thesensortemperaturereadingisabovesetpoint.When

the unit is operating in bulb mode (refer to paragraph

3.3.9), special settings may be applicable.

If the controller is programmed with the Lower DTT

setting option the defrost termination thermostat set

pointmaybeconfiguredtothedefaultof25.6_C(78_F)

orloweredto18_C(64_F).Whenarequestfordefrostis

made by use of the manual defrost switch,

communications or probe check the unit will enter

defrost if the defrost temperature thermostat reading is

at or below the defrost termination thermostat setting.

Defrost will terminate with the defrost temperature

sensor reading rises above the defrost termination

thermostat setting. When a request for defrost is made

bythedefrostintermaletimerorbydemanddefrost,the

defrosttemperaturesettingsettingmust bebelow10_C

(50_F).

When the defrost mode is initiated the controller opens

contacts TD, TN and TE (or TV) to de-energize the

compressor, condenser fan and evaporator fans. The

COOL light is also de--energized.

The controller then closes TH to supply power to the

heaters. The defrost light is illuminated.

Whenthedefrosttemperaturesensorreadingrisestothe

defrost termination thermostat setting, the de--icing

operation is terminated.

If defrost does not terminate correctly and temperature

reaches the set point of the heat termination thermostat

(HTT) the thermostat will open to de--energize the

heaters. If termination does not occurwithin 2.0 hours,

the controller will terminate defrost. An alarm will be

given of a possible DTS failure.

If probe check (controller function code CnF31) is

configured to special, the unit will proceed to the next

operation (snap freeze or terminate defrost). If the code

is configured to standard, the unit will perform aprobe

check. The purpose of the probe check is to detect

malfunctions or drift in the sensed temperature that is

too small to be detected by the normal sensor out of

rangetests.Thesystemwillrunforeightminutesinthis

condition.Attheendoftheeightminutes,probealarms

will be set or cleared based on the conditions seen.

When the return air falls to 7_C(45_F), the controller

checks to ensure the defrost temperature sensor (DTS)

reading has dropped to 10_C or below. If it has not, a

DTS failure alarm is given and the defrost mode is

operated by the return temperature sensor (RTS).

If controller function codeCnF33 is configured tosnap

freeze, the controller will sequence to this operation.

The snap freeze consists of running the compressor

without the evaporator fans in operation for a period of

four minutes with the suction modulation valve fully

open. When the snap freeze is completed, defrost is

formally terminated.

5-1 T-309

SECTION 5

TROUBLESHOOTING

CONDITION POSSIBLE CAUSE REMEDY/

REFERENCE

SECTION

5.1 UNIT WILL NOT START OR STARTS THEN STOPS

External power source OFF Turn on

No power to unit Start-Stop switch OFF or defective Check

Circuit breaker tripped or OFF Check

Circuit breaker OFF or defective Check

Control transformer defective Replace

oss of control po

er Fuse (F3) blown Check

Start-Stop switch OFF or defective Check

Evaporator fan motor internal protector open 6.17

Condenser fan motor internal protector open 6.12

Compressor internal protector open 6.8

Component(s) Not Operating High pressure switch open 5.7

(

)

Heat termination thermostat open Replace

Loss of communication with expansion module Check Wiring

Malfunction of current sensor Replace

Low line voltage Check

Com

ressor hums

but does not Single phasing Check

start Shorted or grounded motor windings 6.8

Compressor seized 6.8

5.2 UNIT OPERATES LONG OR CONTINUOUSLY IN COOLING

Hot load Normal

Container Defective box insulation or air leak Repair

Shortage of refrigerant 6.7.1

Evaporator coil covered with ice 5.6

Evaporator coil plugged with debris 6.15

Evaporator fan(s) rotating backwards 6.15/6.17

Defective evaporator fan motor/capacitor 6.18

Air bypass around evaporator coil Check

Controller set too low Reset

Refrigeration System Compressor service valves or liquid line shutoff valve par-

tially closed Open valves

completely

Dirty condenser 6.11

Compressor worn 6.8

Current limit (function code Cd32) set to wrong value 3.5.5

Suction modulation valve lost track of step count Power cycle

Suction modulation valve malfunction 6.20

Economizer solenoid valve or TXV malfunction 6.14, 6.19

Unloader valve stuck open 6.19

5-2T-309

CONDITION POSSIBLE CAUSE REMEDY/

REFERENCE

SECTION

5.3 UNIT RUNS BUT HAS INSUFFICIENT COOLING

Abnormal pressures 5.7

Abnormal temperatures 5.15

Abnormal currents 5.16

Controller malfunction 5.9

Evaporator fan or motor defective 6.17

Shortage of refrigerant 6.7.1

Refrigeration System Suction modulation valve lost track of step count Power cycle

Suction modulation valve malfunction 6.20

Compressor service valves or liquid line shutoff valve par-

tially closed Open valves

completely

Economizer solenoid valve or TXV malfunction 6.14, 6.19

Unloader valve stuck open 6.19

Frost on coil 5.10

5.4 UNIT WILL NOT HEAT OR HAS INSUFFICIENT HEATING

Start-Stop switch OFF or defective Check

No operation of any kind Circuit breaker OFF or defective Check

External power source OFF Turn ON

Circuit breaker or fuse defective Replace

Control Transformer defective Replace

No control power Evaporator fan internal motor protector open 6.17

Heat relay defective Check

Heater termination thermostat open 6.15

Heater(s) defective 6.15

Heater contactor or coil defective Replace

Evaporator fan motor(s) defective or rotating backwards 6.15/6.17

Unit

ill not heat or has insuffi- Evaporator fan motor contactor defective Replace

cient heat Controller malfunction 5.9

Defective wiring Replace

Loose terminal connections Tighten

Low line voltage 2.3

5.5 UNIT WILL NOT TERMINATE HEATING

Controller improperly set Reset

Controller malfunction 5.9

Heater termination thermostat remains closed along with

the heat relay 6.15

5.6 UNIT WILL NOT DEFROST PROPERLY

Defrost timer malfunction (Cd27) Table 3-5

Loose terminal connections Tighten/

Will not initiate defrost Defective wiring Replace

automatically Defrost temperature sensor defective or heat termination

thermostat open Replace

Heater contactor or coil defective Replace

5-3 T-309

CONDITION POSSIBLE CAUSE REMEDY/

REFERENCE

SECTION

5.6 UNIT WILL NOT DEFROST PROPERLY -- Continued

Will not initiate defrost Manual defrost switch defective Replace

manually Defrost temperature sensor open 4.9.5

Initiates but relay (DR) drops

out Low line voltage 2.3

Heater contactor or coil defective Replace

Initiates but does not defrost Heater(s) burned out 6.15

Frequent defrost Wet load Normal

5.7 ABNORMAL PRESSURES (COOLING)

Condenser coil dirty 6.11

Condenser fan rotating backwards 6.12

Condenser fan inoperative 6.12

High discharge pressure Refrigerant overcharge or noncondensibles 6.7.1

Discharge service valve partially closed Open

Suction modulation valve malfunction 6.20

Faulty suction pressure transducer Replace

Suction service valve partially closed Open

Filter-drier partially plugged 6.13

Low refrigerant charge 6.7.1

Low suction pressure Expansion valve defective 6.14

No evaporator air flow or restricted air flow 6.15

Excessive frost on evaporator coil 5.6

Evaporator fan(s) rotating backwards 2.3

Suction modulation valve malfunction 6.20

Suction and discharge pressures

Compressor operating in reverse 5.14

ten

to equa

en un

operating Compressor cycling/stopped Check

5.8 ABNORMAL NOISE OR VIBRATIONS

Compressor start up after an extended shutdown

Brief chattering when manually shut down Normal

Compressor operating in reverse 5.14

Compressor Loose mounting bolts or worn resilient mounts Tighten/Replace

Loose upper mounting 6.8.1 step r.

Liquid slugging 6.14

Insufficient oil 6.9

Bent, loose or striking venturi Check

Condenser or Evaporator Fan Worn motor bearings 6.12/6.17

Bent motor shaft 6.12/6.17

5-4T-309

CONDITION POSSIBLE CAUSE REMEDY/

REFERENCE

SECTION

5.9 CONTROLLER MALFUNCTION

Defective Sensor 6.22

Defective wiring Check

Will not control Fuse (F1, F2, F3) blown Replace

Stepper motor suction modulation valve circuit malfunction 6.20

Low refrigerant charge 6.7

5.10 NO EVAPORATOR AIR FLOW OR RESTRICTED AIR FLOW

Frost on coil 5.6

Evaporator coil blocked Dirty coil 6.15

Evaporator fan motor internal protector open 6.17

Evaporator fan motor(s) defective 6.17

No or partial evaporator air flo

Evaporator fan(s) loose or defective 6.17

Evaporator fan contactor defective Replace

5.11 THERMOSTATIC EXPANSION VALVE MALFUNCTION

Low refrigerant charge 6.7.1

External equalizer line plugged Open

Wax, oil or dirt plugging valve or orifice Ice formation at

valve seat 6.14

Low suction pressure with high

Superheat not correct 6.7.1

superheat Power assembly failure

Loss of element/bulb charge

Broken capillary 6.14

Foreign material in valve

Superheat setting too low 6.14

High suction pressure

ith lo

External equalizer line plugged Ice holding valve open Open

super

Foreign material in valve 6.14

Liquid slugging in compressor Pin and seat of expansion valve eroded or held open by for-

eign material

Improper bulb location or installation 6.14

Fluctuating suction pressure Low superheat setting

5.12 AUTOTRANSFORMER MALFUNCTION

Circuit breaker (CB-1 or CB-2) tripped Check

Unit

ill not start Power source not turned ON Check

5.13 WATER-COOLED CONDENSER OR WATER PRESSURE SWITCH

Water pressure switch malfunction Check

Condenser fan starts and stops Water supply interruption Check

5-5 T-309

CONDITION POSSIBLE CAUSE REMEDY/

REFERENCE

SECTION

5.14 COMPRESSOR OPERATING IN REVERSE

CAUTION

Allowingthe scroll compressorto operate in reverse formore than two minuteswill result in internal

compressor damage. Turn the start--stop switch OFF immediately.

Incorrect wiring of compressor

Electrical Incorrect wiring of compressor contactor(s) Check

Incorrect wiring of current sensor

5.15 ABNORMAL TEMPERATURES

Discharge temperature sensor drifting high Replace

Failed economizer, TXV or solenoid valve Replace

High discharge temperature Plugged economizer, TXV or solenoid valve Replace

Loose or insufficiently clamped sensor Replace

Failed liquid injection solenoid valve Replace

Discharge temperature sensor drifting low Replace

suction temperature Loose or insufficiently clamped sensor Replace

5.16 ABNORMAL CURRENTS

Unit reads abnormal currents Current sensor wiring Check

6-1 T-309

SECTION 6

SERVICE

NOTE

Toavoiddamagetotheearth’sozonelayer,usearefrigerantrecoverysystemwheneverremovingrefrigerant.

When working with refrigerants you must comply with all local government environmental laws. In the

U.S.A., refer to EPA section 608.

WARNING

Neveruse airfor leak testing. Ithas beende-

termined that pressurized, mixtures of re-

frigerant and air can undergo combustion

when exposed to an ignition source.

6.1 SECTION LAYOUT

Service procedures are provided herein beginning with

refrigeration system service, then refrigeration system

component service, electrical system service,

temperature recorder service and general service. Refer

to the Table Of Contents to locate specific topics.

6.2 SERVICE VALVES

The compressor suction, compressor discharge,

compressor economizer, oil return and the liquid line

service valves (see Figure 6-1) are provided with a

double seat and an access valve which enable servicing

of the compressor and refrigerant lines. Turning the

valve stem clockwise (all the way forward) will

frontseat the valve to close off the line connection and

open a path to the access valve. Turning the stem

counterclockwise (all the way out) will backseat the

valve to open the line connection and close off the path

to the access valve.

With the valve stem midway between frontseat and

backseat,bothoftheservicevalveconnectionsareopen

to the access valve path.

For example, the valve stem is first fully backseated

whenconnectingamanifoldgaugetomeasurepressure.

Then, thevalveis opened1/4 to 1/2 turnto measure the

pressure.

VALVE

FRONTSEATED

(Clockwise)

VALVE

BACKSEATED

(Counterclockwise)

1. Line Connection

2. Access Valve

3. Stem Cap

4. Valve stem

5. Compressor Or Filter

Drier Inlet Connection

Figure 6-1 Service Valve

VALVE

FRONTSEATED

(Clockwise)

VALVE

BACKSEATED

(Counterclockwise)

1. Line Connection

2. Access Valve

3. Stem Cap

4. Valve stem

5. Compressor Inlet

Connection

Figure 6-2 Suction Service Valve

OPENED (Backseated )

HAND VALVE CLOSED (Frontseated)

HAND VALVE

SUCTION

PRESSURE

GAUGE

DISCHARGE

PRESSURE

GAUGE

ABC

A. CONNECTION TO LOW SIDE OF SYSTEM

B. CONNECTION TO EITHER:

REFRIGERANT CYLINDER OR

OIL CONTAINER

C. CONNECTION TO HIGH SIDE OF SYSTEM

Figure 6-3 Manifold Gauge Set

6.3. MANIFOLD GAUGE SET

The manifold gauge set (see Figure 6-3) is used to

determine system operating pressure, add refrigerant

charge, and to equalize or evacuate the system.

When the suction pressure hand valve is frontseated

(turnedallthewayin),thesuction(low)pressurecanbe

checked. When the discharge pressure hand valve is

frontseated, the discharge (high) pressure can be

checked. When both valves are open (turned

counter-clockwiseall thewayout), high pressurevapor

will flow into the low side. When the suction pressure

valve is open and the discharge pressure valveshut, the

6-2T-309

system can be charged. Oil can also be added to the

system.

A R-134a manifold gauge/hose set with self-sealing

hoses (see Figure 6-4) is required for service of the

models covered within this manual. The manifold

gauge/hose set is available from Carrier Transicold.

(Carrier Transicold P/N 07-00294-00, which includes

items1through6,Figure 6-4.)Toperformserviceusing

the manifold gage/hose set, do the following:

a. Preparing Manifold Gauge/Hose Set For Use

1. Ifthemanifoldgauge/hosesetisneworwasexposed

to the atmosphere it will need to be evacuated to

remove contaminants and air as follows:

2. Backseat (turn counterclockwise)both field service

couplings (see Figure 6-4) and midseat both hand

valves.

3. Connect the yellow hose to a vacuum pump and re-

frigerant 134a cylinder.

OPENED

(Backseated )

HAND VALVE

CLOSED

(Frontseated)

HAND VALVE

SUCTION

PRESSURE

GAUGE

DISCHARGE

PRESSURE

GAUGE

To Low Side

Access Valve To High Side

Access Valve

Red Knob

Blue Knob

YELLOW

RED

BLUE

1. Manifold Gauge Set

2. Hose Fitting (0.5-16 Acme)

3. Refrigeration and/or Evacuation Hose

. (SAE J2196/R-134a)

4. Hose Fitting w/O-ring (M14 x 1.5)

5. High Side Field Service Coupling

6. Low Side Field Service Coupling

Figure 6-4 R-134a Manifold Gauge/Hose Set

7. Evacuate to 10 inches of vacuum and then charge

withR-134atoaslightlypositivepressureof0.1kg/

cm@(1.0 psig).

8. Front seat both manifold gauge set valves and dis-

connect from cylinder. The gauge set is now ready

for use.

b. Connecting Manifold Gauge/Hose Set

To connect the manifold gauge/hose set for reading

pressures, do the following:

1. Remove service valve stem cap and check to make

sure it is backseated. Remove access valve cap. (See

Figure 6-1)

2. Connect the field service coupling (see Figure 6-4)

to the access valve.

3. Turn the field service coupling knob clockwise,

which will open the system to the gauge set.

4. To read system pressures: slightly midseat the ser-

vice valve.

5. Repeattheproceduretoconnecttheothersideofthe

gauge set.

CAUTION

Topreventtrappingliquid refrigerantin the

manifold gauge set be sure set is brought to

suction pressure before disconnecting.

c. Removing the Manifold Gauge Set

1. While the compressor is still ON, backseat the high

side service valve.

2. Midseat bothhand valveson the manifold gaugeset

and allow the pressure in the manifold gauge set to

bedrawndowntolowsidepressure.Thisreturnsany

liquidthatmaybeinthehighsidehosetothesystem.

3. Backseat the low side service valve. Backseat both

field service couplings and frontseat both manifold

set valves. Remove the couplings from the access

valves.

4. Install both service valve stem caps and serviceport

caps (finger-tight only).

6.4 PUMPING THE UNIT DOWN

To service the filter-drier, economizer, expansion

valves, moisture-liquid indicator, suction modulation

valve, economizer solenoid valve, unloader solenoid

valve or evaporator coil, pump the refrigerant into the

high side as follows:

CAUTION

The scroll compressor achieves low suction

pressure very quickly. Do not operate the

compressorinadeepvacuum, internaldam-

age will result.

a. Attach manifold gauge set to the compressorsuction

and discharge service valves. Refer to paragraph 6.3.

b. Start the unit and run in the frozen mode (controller

set below --10°C)for10to15minutes.

c. CheckfunctioncodeCd21(refertoparagraph3.2.2).

The economizer solenoid valve should be open. If

not, continue to run until the valve opens.

d. Frontseat the oil return service valve then, frontseat

theliquidlineservicevalve.Placestart-stopswitchin

theOFF position whenthe suctionreaches a positive

pressure of 0.1 kg/cm@(1.0 psig).

e. Frontseat the economizer service valve and then

frontseat the suction and discharge service valves.

Therefrigerantwillbetrappedbetweenthecompres-

sor suction service valve and the liquid line valve.

f. Before opening up any part of the system, a slight

positive pressure should beindicated on thepressure

6-3 T-309

gauge. If a vacuum is indicated, emit refrigerant by

crackingtheliquidlinevalvemomentarilytobuildup

a slight positive pressure.

g. Whenopeninguptherefrigerantsystem,certainparts

mayfrost.Allowtheparttowarmtoambienttemper-

ature before dismantling. This avoids internal con-

densation which puts moisture in the system.

h. After repairs have been made, be sure to perform a

refrigerant leak check (refer to paragraph 6.5), and

evacuate and dehydrate the low side (refer to para-

graph 6.6).

i. Check refrigerant charge (refer to paragraph 6.7).

6.5 REFRIGERANT LEAK CHECKING

WARNING

Never use air for leak testing. It has been

determined that pressurized, air-rich mix-

tures of refrigerants and air can undergo

combustion when exposed to an ignition

source.

a. The recommended procedure for finding leaks in a

systemiswithaR-134aelectronicleakdetector.Test-

ingjointswithsoapsudsissatisfactoryonlyforlocat-

ing large leaks.

b. Ifthesystemiswithoutrefrigerant,chargethesystem

with refrigerant 134a to build up pressure between

2.1to3.5kg/cm@(30to50psig).Toensurecomplete

pressurization of the system, refrigerant should be

charged at the compressor suction and economizer

servicevalvesandtheliquidlineservicevalve.Also,

the area between the suction modulating valve and

evaporatorexpansion valve maynot beopen tothese

charging points. Pressurebetween thesecomponents

maybechecked atthelowsideaccessvalve(item11,

Figure 2-2) or by checking that the suction modulat-

ing valve is more than 10% open at controller func-

tion code Cd01. The suction modulating valve may

beopenedbyuseofthecontrollerfunctioncodeCd41

valve override control (refer to paragraph 6.19). Re-

move refrigerant cylinderandleak-check allconnec-

tions.

NOTE

Only refrigerant 134a should be used to pres-

surize the system. Any other gas or vapor will

contaminate the system, which will require

additional purging and evacuation of the sys-

tem.

c. If required, remove refrigerant using a refrigerant

recovery system and repair any leaks.

d. Evacuateand dehydrate the unit.(Refer toparagraph

6.6.)

e. Charge unit per paragraph 6.7.

6.6 EVACUATION AND DEHYDRATION

6.6.1 General

Moisture is the deadly enemy of refrigeration systems.

The presence of moisture in a refrigeration system can

have many undesirable effects. The most common are

copper plating, acid sludge formation, “freezing-up”of

metering devices by freewater, and formation of acids,

resulting in metal corrosion.

6.6.2 Preparation

a. Evacuateand dehydrateonly after pressure leak test.

(Refer to paragraph 6.5.)

b. Essential tools to properly evacuate and dehydrate

any systeminclude avacuum pump (8 m3/hr= 5 cfm

volume displacement) and an electronic vacuum

gauge. (The pump is available from Carrier Trans-

icold, P/N 07-00176-11.)

c. If possible, keep the ambient temperature above

15.6_C(60_F) to speed evaporation of moisture. If

the ambient temperature is lower than 15.6_C

(60_F), ice might form before moisture removal is

complete.Heatlampsoralternatesourcesofheatmay

be used to raise the system temperature.

d. Additionaltimemaybesavedduringa completesys-

tem pump down by replaceing the filter-drier with a

section of coppertubing and the appropriatefittings.

Installation of a new drier may be performed during

the charging procedure.

11 9

1. Liquid Service Valve

2. Receiver or Water

Cooled Condenser

3. Compressor

4. Discharge Service

Valve

5. Economizer Service

Valve

6. Suction Service Valve

7. Vacuum Pump

8. Electronic Vacuum

Gauge

9. Manifold Gauge Set

10. Refrigerant Cylinder

11. Reclaimer

Figure 6-5. Refrigeration System Service

Connections

6.6.3 Procedure - Complete system

6-4T-309

a. Remove all refrigerant using a refrigerant recovery

system.

b. Therecommendedmethodtoevacuateanddehydrate

thesystem is to connect evacuation hosesatthecom-

pressor suction, compressor economizer and liquid

line service valve (see Figure 6-5). Be sure the ser-

vice hoses are suited for evacuation purposes.

c. The area between the suction modulating valve and

evaporator expansion valve may not be open to the

access valves. To ensure evacuation of this area,

check that the suction modulating valveis morethan

10% open at controller function code Cd01. If re-

quired, the suction modulating valvemay beopened

by use of the controller function code Cd41 valve

overridecontrol.Ifpoweris not availabletoopenthe

valve, the area may be evacuated by connecting an

additional hose at the low side access valve (item 11,

Figure 2-2).

d. Testtheevacuationsetupforleaksbybackseatingthe

unit service valves and drawing a deep vacuum with

thevacuumpumpandgaugevalvesopen.Shutoffthe

pump and check to see if the vacuum holds. Repair

leaks if necessary.

e. Midseat the refrigerant system service valves.

f. Openthevacuumpumpandelectronicvacuumgauge

valves,iftheyarenotalready open. Start thevacuum

pump. Evacuate unit until the electronic vacuum

gauge indicates 2000 microns. Close the electronic

vacuumgaugeandvacuumpumpvalves.Shutoffthe

vacuumpump.Waitafewminutestobesurethevac-

uum holds.

g. Break the vacuum with clean dry refrigerant 134a

gas. Raise system pressure to approximately 0.2 kg/

cm@(2 psig), monitoring it with the compound

gauge.

h. Remove refrigerant using a refrigerant recovery sys-

tem.

i. Repeat steps f.and g. one time.

j. Removethecoppertubingandchangethefilter-drier.

Evacuate unit to 500 microns. Close the electronic

vacuumgaugeandvacuumpumpvalves.Shutoffthe

vacuum pump. Wait five minutes to see if vacuum

holds. This procedure checks for residual moisture

and/or leaks.

k. With a vacuumstill in the unit,the refrigerantcharge

may bedrawninto the systemfromarefrigerant con-

tainer on weight scales. Continue to paragraph 6.7

123

1. Receiver or Water

Cooled Condenser

2. Compressor

3. Discharge Service

Valve

4. Economizer Service

Valve

5. Suction Service Valve

6. Vacuum Pump

7. Electronic Vacuum

Gauge

8. Manifold Gauge Set

9. Refrigerant Cylinder

10. Reclaimer

Figure 6-6. Compressor Service Connections

6.6.4 Procedure - Partial System

a. If the refrigerant charge has been removed from the

compressorforservice,evacuateonlythecompressor

by connecting the evacuation set--up at the compres-

sor service valves. (See Figure 6-6.) Follow evacua-

tion procedures of the preceding paragraph except

leave compressor service valves frontseated until

evacuation is completed.

b. If refrigerant charge has been removed from the low

side only, evacuate the low side by connecting the

evacuation set--up at the compressor suction and

economizer service valves and the liquid service

valveexceptleavetheservicevalvesfrontseateduntil

evacuation is completed.

c. Once evacuation has been completed and the pump

has been isolated, fully backseat the service valvesto

isolate the service connections and then continue

with checking and, if required, adding refrigerant in

accordance with normal procedures

6-5 T-309

6.7 REFRIGERANT CHARGE

6.7.1 Checking the Refrigerant Charge

NOTE

To avoiddamagetothe earth’sozonelayer, use

arefrigerant recoverysystem wheneverremov-

ing refrigerant. When working with refriger-

ants you must comply with all local govern-

ment environmental laws. In the U.S.A., refer

to EPA section 608.

a. Connect the gauge manifold to the compressor dis-

chargeandsuctionservicevalves.Forunitsoperating

on a water cooled condenser, change over to air

cooled operation.

b. Bring the container temperature to approximately

1.7_C(35_F)or--17.8_C(0_F).Thensetthecontrol-

lerset point to --25_C(--13_F) to ensurethat thesuc-

tion modulation valve is fully open. (Position of the

suctionmodulating valve may be checked atcontrol-

ler function code Cd01.)

c. Partially block the condenser coil inlet air. Increase

theareablockeduntilthecompressordischargepres-

sureisraisedtoapproximately12kg/cm@(175psig).

d. Onunitsequippedwithareceiver,thelevelshouldbe

between the glasses. On units equipped with a water

cooled condenser, the level should be at the centerof

theglass.Iftherefrigerantlevelisnotcorrect,contin-

uewiththefollowingparagraphstoaddorremovere-

frigerant as required.

6.7.2 Adding Refrigerant to System (Full Charge)

a. Evacuate unit and leave in deep vacuum. (Refer to

paragraph 6.6.)

b. Place cylinderof R-134aon scaleand connectcharg-

ing line from cylinder to liquid line valve. Purge

charginglineatliquidlinevalveandthennoteweight

of cylinder and refrigerant.

c. Openliquidvalveoncylinder. Openliquidlinevalve

half-way and allow theliquid refrigerantto flow into

theunituntilthecorrectweightofrefrigerant(referto

paragraph2.2) has been added asindicated by scales.

NOTE

It may be necessary to finish charging unit

through suction service valve in gas form, due

to pressure rise in high side of the system.

(Refer to section paragraph 6.7.3)

d. Backseatmanualliquid linevalve(tocloseoffgauge

port). Close liquid valve on cylinder.

e. Start unit in cooling mode. Run approximately 10

minutes and check the refrigerant charge.

6.7.3 Adding Refrigerant to System (Partial

Charge)

a. Examine the unitrefrigerant system foranyevidence

of leaks. Repair as necessary. (Refer to paragraph

6.5.)

b. Maintain the conditions outlined in paragraph 6.7.1

c. Fully backseat the suction service valve and remove

the service port cap.

d. Connect charging line between suction service valve

port and cylinder of refrigerant R-134a. Open

VAPOR valve.

e. Partially frontseat (turn clockwise) the suction ser-

vicevalveandslowlyaddchargeuntiltherefrigerant

appearsattheproperlevel.Becarefulnottofrontseat

the suction valve fully, if the compressor is operated

in a vacuum internal damage may result.

6.8 COMPRESSOR -- Model RSH105

WARNING

Make sure power to the unit is OFF and

power plug disconnected before replacing

the compressor.

WARNING

Before disassembly of the compressor make

sure to relieve the internal pressure very

carefully by slightly loosening the couplings

to break the seal.

CAUTION

The scroll compressor achieves low suction

pressure very quickly. Do not use the com-

pressor to evacuate the system below zero

psig. Never operate the compressor with the

suction or discharge service valves closed

(frontseated). Internal damage will result

from operating the compressor in a deep

vacuum.

6.8.1 Removal and Replacement of Compressor

NOTE

Servicecompressorcontainsanitrogencharge.

Due to the hygroscopic nature of the oil, time

the compressor is left open to the atmosphere

should be minimized as much as possible.

a. Procure areplacement compressor kit. Alist ofitems

contained in the compressor kit is provided in

Table 6-1.

b. Ifthecompressorisoperational, pumpthe unitdown

(refer to paragraph 6.4).

6-6T-309

Table 6-1 Compressor Kit

Item Component Qty

1Compressor 1

2Service Valve Seal 3

3Mylar Washers 4

4Wire Tie 2

5Oil Sight Glass Plug 1

6Resilient Mount 4

7Upper Shock Mount Ring 1

8Upper Shock Mount Bushing 1

9Compressor Power Plug O--Ring 1

10 SST Washers 8

c. If the compressor is not operational, turn the unit

start--stop switch (ST) and unit circuit breaker

(CB--1)OFF.Disconnectpowertotheunitandfront--

seatthedischarge,suction,economizer,andoilreturn

service valves.

Remove all remaining refrigerant from the compres-

sor using a refrigerant recovery system. Connect

hoses to suction, economizer and discharge service

valves ports. Evacuate compressor to 500 microns

(75.9 cm Hg vacuum = 29.9 inches Hg vacuum).

d. Make sure power to the unit is OFF and unit power

plug disconnected. Disconnect the power plug from

the compressor.

e. Loosenandbreakthesealatfittingsfromthesuction,

discharge, economizer, and the oil return service

valves. Remove fittings and discard service valve

seals, retain oil return valve O--ring.

f. Remove the entire compressor upper mounting

bracket assembly,(see Figure 6-7) by removing the

fourcapscrewsattachingittotheunitandthe32--mm

bolt from the compressor mounting bracket.

Upper Shock Mount

Bushing(KitItem8) Upper Shock Mount

Ring (Kit Item 7)

Shoulder Bolt

32mm Bolt

Figure 6-7 Compressor Upper Mounting

Resilient Mount

(Kit Item 6)

Mylar Washer

(Kit Item 3)

Mylar Protector

(Retain)

Base Plate

(Retain)

Mylar Protector

(Retain)

SST Washer

(Kit Item 10)

SST Washer

(Kit Item 10)

Figure 6-8 Compressor Lower Mounting

g. Replace the upper mounting bracket shock mount

ring and bushing (kit items 7and 8). Reassemble the

bracketinthesamemannerastheoriginalandtorque

the shoulder bolt to 2.8 mkg (20 ft--lbs.).

h. Remove the male coupling from the top of the sight

glassontheoldcompressorandhandassembletothe

oil return valve coupling for safe keeping. Plug the

top of the replacement compressor sight glass with

the plug (kit item 5) to prevent spilling oil.

i. Remove the lowermounting bolts and hardware(see

Figure 6-8). Using plugs from replacementcompres-

sor,plugconnectionsonoldcompressor.Removethe

old compressor. Refer to paragraph 2.2for compres-

sor weight. Return plugs to replacement compressor.

j. The replacement compressor is shipped with an oil

charge of 591ml (20 ounces). Beforesliding the new

compressorintheunit,removetheoilsightglassplug

and (using a small funnel) charge the compressor

with an additional 1893ml (64 ounces) Castrol--Ice-

maticSW20(POEoil).Reassembletheoilsightglass

plugtoavoidspillingoilwhenslidingthecompressor

in the unit.

k. Securethebaseplateandmylarprotectorstothecom-

pressorwithwireties(kititem4), andplacethecom-

pressor in the unit.

l. Cut and remove the wire ties that were used to hold

the base plate and protectors to the compressor. Us-

ing new resilient mounts, SST washers and mylar

washers(kititems3,6&10).Installthefourmount-

ing screws loosely.

m.Installthemalecoupling(removedinsteph.)intothe

sight glass port.

6-7 T-309

n. Place the new service seals (kit item 2) at the com-

pressorservice ports, connect thefour servicevalves

loosely.

o. Torquethefourresilientmountscrewsto6.2mkg(45

ft--lbs).

p. Torque the four service valves to:

Service Valve Torque

Suction or Discharge 11 to 13.8 mkg

(80 to 100 ft--lbs.)

Economizer 6.9to8.3mkg

(50to60ft--lbs.)

Oil Return 1.4to1.66mkg

(10to12ft--lbs.)

q. Reassemble the top mounting bracket (see

Figure 6-7) by hand tightening the 32--mm (1¼

--inch)boltandtorquingthefourmountingscrewsto

0.9 mkg (6.5 ft--lbs). Align the mounting so that the

ringandbushingassemblyarefreewithnocompres-

sion.

r. Torque the32mm bolt to 1.5 mkg (11 ft--lbs.). While

maintaining the free movement of the shock mount,

torque the four mounting screws to 0.9 mkg (6.5 ft--

lbs.).

s. Replace the power plug O--Ring with new ring (kit

item9).Insertthepowerplugintothecompressorfit-

ting. Be sure plug is fully seated into the fitting and

then thread the coupling nut a minimum of 5 turns.

t. Leakcheckand evacuatethe compressorto 1000 mi-

crons. Refer to paragraphs 6.5 and 6.6

u. Run the unit for at least 15 minutes and check the oil

and refrigerant levels. Refer to paragraphs 6.7 and

6.9.

6.9 COMPRESSOR OIL LEVEL

CAUTION

Use only Carrier Transicold approved

Polyol Ester Oil (POE) -- Mobil ST32 com-

pressor oil with R-134a. Buy in quantities of

onequartorsmaller.Whenusingthishygro-

scopic oil, immediately reseal. Do not leave

container of oil open or contamination will

occur.

a. Checking the Oil Level in the Compressor

1 Ideally, ambient temperature should be between

40_F and 100_F.

2 Operatetheunitincoolingmodeforatleast20min-

utes.

3 Check the controller function code Cd1 for the suc-

tion modulation valve(SMV) position.It should be

at least 20% open.

4 Locatetheoilsightglassonthesideofthecompres-

sor (item 7, Figure 2-3).

5 TurnStart/Stopswitch offandallowoiltodraininto

compressor sump. Oil level must be visible in the

sightglass.Ifitisnotvisible,oilmustbeaddedtothe

compressor.

b. Adding Oil with Compressor in System

1. The recommended method is to add oil using an oil

pump at the oil return service valve (see item 15,

Figure 2-3)

2. Inan emergencywhere an oil pumpis not available,

oilmaybedrawnintothecompressorthroughtheoil

return service valve.

Connect the suction connection of the gauge man-

ifold to the compressor oil return valve port, and

immersethe common connection ofthe gaugeman-

ifold in an open container of refrigeration oil.

Extreme care must be taken to ensure the manifold

common connection remains immersed in oil at all

times.Otherwiseairandmoisturewillbedrawninto

the compressor. Crack the oil return service valve

andgaugevalvetoventasmallamountofrefrigerant

throughthecommonconnectionandtheoiltopurge

the lines of air. Close the gauge manifold valve.

With theunit running, turn thesuction servicevalve

toward frontseat and induce a vacuum in the com-

pressor crankcase. Do not allow the compressor to

pull below 127mm/hg (5 “/hg). SLOWLY crack the

suction gauge manifold valve and oil will flow

throughtheoilreturnservicevalveintothecompres-

sor. Add oil as necessary.

3 Run unit for 20 minutes in cooling mode. Check oil

level at the compressor sight glass.

c. Removing Oil from the Compressor:

1 If the oil level is above the sight glass, oil must be

removed from the compressor.

2 Perform a compressor pump down, refer to section

6.4.

3 Removetheoilplug,anddrainoiluntilalevelcanbe

seen in the sight glass.

4 Run unit for 20 minutes in cooling mode. Check oil

level at the compressor sight glass.

6.10 HIGH PRESSURE SWITCH

6.10.1 Replacing High Pressure Switch

a. Turn unit start-stop switch OFF. Frontseat the suc-

tion, discharge, economizer and oil return service

valves to isolate compressor. Remove the refrigerant

from the compressor.

b. Disconnect wiring from defective switch. The high

pressure switch is located on the discharge service

valve and is removed by turning counterclockwise.

(See Figure 2-3.)

c. Install a new high pressure switch after verifying

switch settings. (Refer to paragraph 6.10.2.)

d. Evacuate and dehydrate the compressor per para-

graph 6.6.

6-8T-309

6.10.2 Checking High Pressure Switch

WARNING

Do not use a nitrogen cylinder without a

pressure regulator. Do not use oxygen in or

near a refrigeration system as an explosion

may occur.

NOTE

The high pressure switch is non-adjustable.

a. Remove switch as outlined in paragraph 6.10.1

b. Connect ohmmeter or continuity light across switch

terminals. Ohm meter will indicate no resistance or

continuity light will be illuminated if the switch

closed after relieving compressor pressure.

c. Connect hose to a cylinder of dry nitrogen. (See

Figure 6-9.)

1. Cylinder Valve

and Gauge

2. Pressure Regulator

3. Nitrogen Cylinder

4. Pressure Gauge

(0 to 36 kg/cm@=

0 to 400 psig)

5. Bleed-Off Valve

6. 1/4 inch Connection

Figure 6-9 High Pressure Switch Testing

d. Set nitrogen pressure regulator at 26.4 kg/cm@(375

psig) with bleed-off valve closed.

e. Close valve on cylinder and open bleed-off valve.

f. Open cylinder valve. Slowly close bleed-off valveto

increase pressure on switch. The switch should open

at a static pressure up to 25 kg/cm@(350 psig). If a

lightisused,lightwillgoout.Ifanohmmeterisused,

the meter will indicate open circuit.

g. Slowlyopenbleed-offvalvetodecreasethepressure.

The switch should close at 18 kg/cm@(250 psig).

6.11 CONDENSER COIL

The condenser consists of a series of parallel copper

tubes expanded into copper fins. The condenser coil

mustbecleanedwithfreshwaterorsteamsotheairflow

is not restricted. To replace the coil, do the following:

WARNING

Do not open the condenser fan grille before

turning power OFF and disconnecting

power plug.

a. Using a refrigerant reclaim system, remove the

refrigerant charge.

b. Remove the condenser coil guard.

c. Unsolder discharge line and remove the line to the

receiver or water-cooled condenser.

d. Remove coil mounting hardware and remove the

coil.

e. Install replacement coil and solder connections.

f. Leak-check the coil connections per paragraph para-

graph 6.5. Evacuate the unit per paragraph 6.6 then

charge the unit with refrigerant per paragraph 6.7.

6.12 CONDENSER FAN AND MOTOR ASSEMBLY

WARNING

Do not open condenser fan grille before

turning power OFF and disconnecting

power plug.

The condenser fan rotates counter-clockwise (viewed

from front of unit), pulls air through the the condenser

coil,anddischargeshorizontallythroughthefrontofthe

unit. To replace motor assembly:

a. Open condenser fan screen guard.

b. Loosen two square head set screws on fan. (Thread

sealer has been applied to set screws at installation.)

Disconnect wiring from motor junction box.

CAUTION

Take necessary steps (place plywood over

coil or use sling on motor) to prevent motor

from falling into condenser coil.

c. Remove motor mounting hardware and replace the

motor. It is recommended that new locknuts be used

when replacing motor. Connect wiring per wiring

diagram.

d. Install fan loosely on motor shaft (hub side in). DO

NOTUSEFORCE.Ifnecessary,tapthehubonly,not

the hub nuts or bolts. Install venturi. Apply “Loctite

H”tofansetscrews.Adjustfanwithinventurisothat

the outer edge of the fan is within 2.0 ±.07 mm

(0.08”¦0.03”)from theoutside ofthe orificeopen-

ing. Spin fan by hand to check clearance.

e. Close and secure condenser fan screen guard.

f. Apply power to unit and check fan rotation. If fan

motor rotates backward, reverse wire numbers 5 and

6.13 FILTER-DRIER

Onunitsequippedwithawater-cooledcondenser, ifthe

sight glass appears to be flashing or bubbles are

constantly moving through the sight glass when the

suction modulation valve is fully open, the unit may

havea lowrefrigerant chargeor thefilter-drier couldbe

partially plugged.

a. To Check Filter-Drier

1. Testforarestrictedorpluggedfilter-drierbyfeeling

the liquid line inlet and outlet connections of the

driercartridge.Iftheoutletsidefeelscoolerthanthe

inlet side, then the filter-drier should be changed.

6-9 T-309

2. Check the moisture-liquid indicator if the indicator

showsahighlevelofmoisture,thefilter-driershould

be replaced.

b. To Replace Filter-Drier

1. Pump down the unit (refer to paragraph 6.4 and

replace filter-drier.

2. Evacuate the low side in accordance with paragraph

6.6.

3. Afterunitisinoperation,inspectformoistureinsys-

tem and check charge.

6.14 EXPANSION VALVES

Two expansion valves are used, the evaporator

expansion valve (item 9, Figure 2-2), and the

economizer expansion valve (item 26, Figure 2-4) .The

expansionvalvesareautomaticdeviceswhichmaintain

constant superheat of the refrigerant gas leaving at the

pointofbulbattachmentregardlessof suctionpressure.

The valve functions are:

1. Automatic control of the refrigerant flow to match

the load.

2. Prevention of liquid refrigerant entering the com-

pressor.

Unless the valve is defective, it seldom requires

maintenance other than periodic inspection to ensure

thatthethermalbulbistightlysecuredtothesuctionline

and wrapped with insulating compound. (See

Figure 6-10.)

1. Suction Line

2. TXV Bulb Clamp 3. Nut and Bolt

4. TXV Bulb

Figure 6-10 Thermostatic Expansion Valve Bulb

6.14.1 Checking Superheat.

NOTE

Propersuperheatmeasurementfortheevapora-

tor expansion valve should be completed at

-- 1 8 _C(0_F) container box temperature where

possible. If the economizer valve is suspect, it

should be replaced.

a. Open the heater access panel (see Figure 2-1) to ex-

pose the evaporator expansion valve.

b. Attachatemperaturesensorneartheexpansionvalve

bulb and insulate. Make surethe suctionline is clean

and that firm contact is made with the sensor.

c. Connectanaccurategaugetotheserviceportdirectly

upstream of the suction modulating valve.

d. Setthetemperaturesetpointto --18_C(0_F),andrun

unit until conditions stabilize.

e. Thereadingsmaycyclefromahightoalowreading.

Take readings of temperature and pressure every

three to five minutes for a total of 5or 6 readings

f. From the temperature/pressure chart (Table 6-7), de-

termine the saturation temperature corresponding to

the evaporator outlet test pressures at the suction

modulation valve.

g. Subtract the saturation temperatures determined in

stepf.fromthetemperaturesmeasuredinstep e..The

difference is the superheat of the suction gas. Deter-

mine the average superheatIt shouldbe 4.5to 6.7 °C

(8 to 12 °F)

6.14.2 Valve Replacement

a. Removing the Expansion Valve

NOTES

1. TheTXV’sarehermeticvalvesanddonot

have adjustable superheat.

2. All connections on the evaporator TXV are

bi---metallic, copper on the inside and

stainless on the outside. When brazing,

bi---metallic connections heat up very

quickly.

1. Evaporator Expansion Valve

2. Non-adjustable Superheat Stem

3. Equalizer Connection

4. Inlet Connection

5. Outlet Connection

6. Expansion Valve Bulb

Figure 6-11 Evaporator Expansion Valve

6-10T-309

Copper Tube

(Apply heat for

10-15 seconds)

Bi-metallic Tube Connection

(Apply heat for 2-5 seconds) Use of a wet cloth is not neces-

sary due to rapid heat dissipation

of the bi--metallic connections

Braze Rod

(’Sil-Phos” = 5.5% Silver, 6% Phosphorus)

Figure 6-12 Hermetic Thermostatic Expansion Valve Brazing Procedure

INLET

OUTLET

Figure 6-13 Economizer Expansion Valve

1. Pump down the unit per paragraph 6.4.

2. Removecushionclampslocatedontheinletandout-

let lines.

3. Unbrazetheequalizerconnection(ifapplicable),the

outlet connection and then the inlet connection.

4. Removeinsulation(Presstite)fromexpansionvalve

bulb.

5. Unstrapthebulb,locatedbelowthecenterofthesuc-

tion line (4 o’clock position), and remove thevalve.

b. Installing the Expansion Valve

1. Clean the suction line with sandpaper before instal-

ling bulb to ensure proper heat transfer. Apply ther-

mal grease to the indentation in the suction line.

2. Strap the thermal bulb to the suction line, making

sure bulb is placed firmly into the suction line. See

Figure 6-10 for bulb placement.

3. Insulate the thermal bulb.

4. The economizer expansion valves should be

wrapped in a soaked cloth for brazing. See

Figure 6-12. Braze inlet connection to inlet line

5. Braze outlet connection to outlet line.

6. Reinstall the cushion clamps on inlet and outlet

lines.

7. If applicable, braze the equalizer connection to the

equalizer line.

8. Check superheat (refer to step 6.14.1).

6.15 EVAPORATOR COIL AND HEATER

ASSEMBLY

The evaporator section, including the coil, should be

cleaned regularly. The preferred cleaning fluid is fresh

waterorsteam.AnotherrecommendedcleanerisOakite

202 or similar, following manufacturer’s instructions.

The two drain pan hoses are routed behind the

condenser fan motor and compressor. The drain pan

line(s) must be open to ensure adequate drainage.

6.15.1 Evaporator Coil Replacement

a. Pump unit down. (Refer to paragraph 6.4.)

b. With power OFF and power plug removed, remove

thescrewssecuringthepanelcoveringtheevaporator

section (upper panel).

c. Disconnect the defrost heater wiring.

d. Disconnect the defrost temperature sensor (see Fig-

ure Figure 2-2 from the coil. .

e. Remove middle coil support.

f. Remove the mounting hardware from the coil.

g. Unsolderthetwocoil connections, oneat thedistrib-

utor and the other at the coil header.

h. After defective coil is removed from unit, remove

defrost heaters and install on replacement coil.

i. Install coil assembly by reversing above steps.

j. Leak check connections per paragraph 6.5. Evacuate

the unit per paragraph 6.6 and add refrigerant charge

per paragraph 6.7.

6.15.2 Evaporator Heater Replacement

a.Beforeservicingunit,makesuretheunitcircuitbreak-

ers (CB-1& CB-2) andthe start-stopswitch (ST) are

intheOFFposition,andthatthepowerplugandcable

are disconnected.

b. Remove the lower access panel (Figure 2-1) by

removing the T.I.R. locking device lockwire and

mounting screws.

6-11 T-309

c. Determine which heater(s) need replacing by check-

ing resistance on each heater. Refer to paragraph 2.3

for heater resistance values

d. Remove hold-down clamp securing heaters to coil.

e. Lift the bent end of the heater (with the opposite end

down and away from coil). Move heater to the side

enough to clear the heater end support and remove.

6.16 ECONOMIZER, UNLOADER, LIQUID INJEC-

TION AND OIL RETURN SOLENOID VALVE

a. Replacing the Coil

NOTE

Thecoilmay bereplacedwithoutremovingthe

refrigerant.

1 Be sure electrical power is removed from the unit.

Disconnect leads. Remove top screw and washer.

Lift off coil. (See Figure 6-14 or Figure 6-15)

2 Verify coil type, voltage and frequency of old and

newcoil.Thisinformationappearsonthecoilhous-

ing.

b. Replacing Valve Internal Parts (Unloader

Solenoid Only)

1 Pump down the unit. Refer to paragraph 6.4.

2 Be sure electrical power is removed from the unit.

Disconnect leads. Remove top screw and washer.

Lift off coil. (See Figure 6-14)

3 Remove the top screw (see Figure 6-14), washer ,

and coil assembly.

4 Loosen the enclosing tube locknut.

5 Remove enclosing tube and locknut assembly. The

gasket is inside the enclosing tube.

6 Remove seat disc from inside ofbody and checkfor

obstructions and foreign material.

7 Placetheseatdiscintothevalvebodywiththesmall-

er diameter end facing up.

8 Install stem and plunger.

9 Place the enclosing tube locknut over the enclosing

tube. Install spacer over enclosing tube making sure

it is seated properly in the enclosing tube locknut.

Tighten enclosing tube locknut to a torque value of

2.78 mkg (20 ft-lb). Do not overtighten.

10 Install coil assembly, washer and top screw.

11 Evacuateanddehydratethesystem.(Refertosection

6.6.) Charge unit with refrigerant per section 6.7.

12 Start unit and check operation.

c. Replacing Valve

1 To replace the unloader, liquid injection or econo-

mizervalve,pumpdowntheunit.Refertoparagraph

6.4. To replace the oil return valve, remove the re-

frigerant charge.

2 Be sure electrical power is removed from the unit.

Disconnect leads. Remove top screw and washer.

Lift off coil. (See Figure 6-14 or Figure 6-15)

3 Unbraze valve from unit and braze new valve in

place

4 Install coil. Evacuate low side and place unit back

in operation. Check charge.

1. Top Screw

2. Washer

3. Coil

4. Locknut

5. Enclosing Tube

6. Gasket

7. Stem and Plunger

8. Seat Disc

9. Body

Figure 6-14. Unloader Solenoid Valve

1. Slotted Screw

2. Washer

3. Coil

4. Enclosing Tube and

Body

Figure 6-15. Oil Return Solenoid Valve (ORV),

Economizer Solenoid Valve (ESV), Liquid

Injection Solenoid Valve (LIV)

6.17 EVAPORATOR FAN AND MOTOR ASSEMBLY

The evaporator fans circulate air throughout the

container bypulling airin the top ofthe unit. The airis

forced through the evaporator coil where it is either

heated or cooledand thendischarged out the bottom of

6-12T-309

the refrigeration unit into the container. The fan motor

bearings are factory lubricated and do not require

additional grease.

6.17.1 Replacing The Evaporator Fan Assembly

WARNING

Always turn OFF the unit circuit breakers

(CB-1 & CB-2) and disconnect main power

supply before working on moving parts.

a. Remove upper access panel (see Figure 2-2) by

removing mounting bolts and T.I.R. locking device.

Reach insideofunit and removetheTy-Rapsecuring

the wire harness loop. Then unplug the connector by

twisting to unlock and pulling to separate. NOTE: It

maybeeasiertounplugtheconnectorwiththemotor

assembly partially pulled out (after step b).

b. Remove the four mounting bolts that secure the mo-

tor--fan assembly to the unit.

c. Slide the fan assembly out from the unit and place it

on a sturdy work surface.

d. Remove the motor and fan from the assembly.

e. Replace the motor.

f. Lubricate the fan motor shaft with a graphite--oil

solution (Never--Seez) and apply thread sealer (Loc-

tite H, brown in color) to the two fan set screws.

Installfanonthemotorshaft,sothatthecouplingsur-

face will be even with the end of the motor shaft.

g. Install the fan assembly in reverse order of removal.

Apply power momentarily to check for proper fan

rotation(refertoparagraph2.3).Ifthefanspinsback-

wards, than motor wiring or motor is defective.

Replace access panel making sure that panel does not

leak. Lock--wire the T.I.R. locking device(s).

1. Bracket

2. Flat washer, 3/8

3. Bolt, 3/8-16 x 1.00

4. Locknut, 5/16-18

5. Flat washer, 5/16

6. Cap Screw, Hxhd

5/16-18 x 1.25

7. Fan

8. Shim

9. Evaporator Motor

Figure 6-16. Evaporator Fan Assembly

6.18 EVAPORATOR FAN MOTOR CAPACITORS

The evaporator fan motors are of the permanent-split

capacitor type. The motor is equipped with one

capacitor used in the high speed circuit and another

capacitor used for the low speed circuit.

6.18.1 When To Check For A Defective Capacitor

a. Fanmotorwillnotchangespeed.Forexample:inthe

conventionalperishablemode,themotorsshouldrun

in high speed. In the economy perishable mode they

shouldswitchspeedsandinthefrozenmode,themo-

tors should run in low speed.

NOTE

The evaporator fan motors will always start in

high speed.

b. Motor running in wrong direction (after checking

for correct wiring application).

c. Motor will not start, and IP-EM’s are not open.

6.18.2 Removing The Capacitor

WARNING

Make sure power to the unit is OFF and

power plug disconnected before removing

capacitor(s).

The capacitors are located on the motor and above the

evaporator fan deck they may be removed by two

methods:

1If container is empty, open upper rear panel of the

unit.Thecapacitormaybeservicedafterdisconnect-

ing power plug.

2If container is full,turn theunit power OFF anddis-

connect power plug. Remove the evaporator fan

motor access panel. (See see Figure 2-1). For

removal oftheevaporatorfan assembly,refertosec-

tion 6.17. WARNING

WithpowerOFFdischargethecapacitorbe-

fore disconnecting the circuit wiring.

6.18.3 Checking The Capacitor

If the capacitor is suspected of malfunction, you may

choosetosimplyreplaceit.Directreplacementrequires

a capacitor of the same value. Two methods for

checking capacitor function are:

1. Volt-ohmmeter set on RX 10,000 ohms.

Connect ohmmeter leads across the capacitorterminals

and observe the meter needle. If the capacitor is good,

the needle will make a rapid swing toward zero

resistance and then gradually swing back toward avery

high resistance reading.

If the capacitor has failed open, the ohmmeter needle

will not move when the meter probes touch the

terminals. If the capacitor is shorted, the needle will

swing to zero resistance position and stay there.

2. Capacitor analyzer:

The function of the analyzer is to read the microfarad

value ofa capacitor and to detect insulation breakdown

6-13 T-309

under load conditions. The important advantages of a

analyzer are its ability to locate capacitors that have

failed to hold their microfarad ratings, or those thatare

breaking down internally during operation. It is also

useful in identifying capacitors when their microfarad

rating marks have become unreadable.

6.19 VALVE OVERRIDE CONTROLS

CAUTION

DONOTdisassemblepistonfromNEWsuc-

tion modulating valve powerhead assembly.

Doing so may result in damage to piston.

Controller function code Cd41 is a configurable code

that allows timed operation of the automatic valves for

troubleshooting.Threetestsequencesareprovided.The

first, capacity mode (CAP), allows alignment of the

unloader and economizer solenoid valves in the

standard, unloaded and economized operating

configurations. The second, SMV % Setting (SM)

allows opening of the suction modulating valve to

various percentages and the third, Oil Valve Setting

(OIL)andLiquidValveSetting(LIV)allowsopeningor

closing of the oil return solenoid valve and the liquid

injection solenoid valve. A fourth selection is also

provided to enter a time period of up to three minutes,

during which the override(s) are active. If the timer is

active, valve override selections will take place

immediately. If thetimeris not active, changes will not

take place for a few seconds after the timer is started.

When the timer times out, override function is

automatically terminated and the valves return to

normal machinery control. To operate the override, do

the following:

a. PresstheCODESELECTkeythenpressanARROW

key until Cd41 is displayed in the left window. The

right window will display a controller communica-

tions code.

b. Press the ENTER key. The left display will show a

test name alternating with the test setting or time re-

maining.UseanARROWkeytoscrolltothedesired

test. Press theENTER key and SELCt will appear in

the left display.

c. Use an ARROW key to scroll to the desired setting,

and then press the ENTER key. Selections available

for each of the tests are provided in the following

table.

d. If the timer is not operating, follow the aboveproce-

dure to display the timer. Use an ARROW key to

scrolltothedesiredtimeintervalandpressENTERto

start the timer.

e. The above described sequence may be repeated dur-

ing the timer cycle to change to another override.

Right Display Available Selections

CAP

(Capacity Mode) AUtO

(Normal Control)

(

)

UnLd

(Unloader = Open

Economizer = Closed)

Std

(Unloader = closed

Economizer = closed)

ECOn

(Unloader = closed

Economizer = open)

(SMV % Setting) AUtO

(Normal Control)

100

OIL

(Oil Valve Setting) AUto

(Normal Control)

(

)

OPEn

LIV

(Liquid Valve Setting, if

)

AUto

(Normal Control)

(

applicable) CLOSE

OPEn

tIM

(Timer) 000(0 minutes/0 Seconds)

In 30 second increments to

300(3 minutes/ 0 seconds)

6.20 SUCTION MODULATION VALVE

On start up of the unit, the valve will reset to a known

open position. This is accomplished by assuming the

valve was fully open, driving it fully closed, resetting

the percentage open to zero, then opening to a known

10% staging position.

2-1/8 inch Nut

FROM COIL

FROM UNLOADER TO COMPRESSOR

Figure 6-17 Suction Modulation Valve (SMV)

6-14T-309

6.20.1 Precheck Procedure

a. Check unit for abnormal operation.

b. Check charge. If refrigerant is low repair as required

and again check operation.

c. If sufficient capacity cannot be maintained or unit is

tripping excessively on high pressure switch (HPS)

in high ambients, check coils and clean if required.

d. If capacity or control cannot be maintained turn unit

OFF, then back ON. This will reset the valve in the

event the controller lost communication with the

valve, and may correct the problem.

NOTE

Carefully listen to the valve. During reset, the

valve will make a ratcheting noise that may be

heard or felt as it is attempting to close. If this

canbeheardorfelt,itindicatesthatthecontrol-

leranddrivemoduleareattemptingtoclosethe

valve, and may serveas a quick indicationthat

the drive is in working order.

e. Operationofthevalvemaybecheckedusingthecon-

troller valve override program, function code Cd41.

Refer to paragraph 6.19 for valve override test in-

structions.

6.20.2 Checking The Stepper valve

a. Checking with ohmmeter

Disconnect the four pin connector to the stepper SMV.

With a reliable digital ohmmeter, check the winding

resistance.Innormalambient,thevalveshould have72

to 84 ohms measured on the red/green (a-b terminals)

and on the white/black (c-d terminals) leads. If an

infinite or zero reading occurs, check connections and

replace the motor.

b. Checking with SMA-12 portable stepper drive tester

The SMA-12 portable stepper drive tester (Carrier

Transicold P/N 07-00375-00) is a battery operated

stepperdrivewhichwillopenandclosetheSMV,which

allows a more thorough check of the operating

mechanism.

To check operation:

1. Stoptheunit,disconnectthefourpinconnectorfrom

thesteppermoduletothevalve(seeFigure 6-17)and

attachtheSMA-12stepperdrivetotheconnectorgo-

ingtothevalve.

2. Set the SMA-12 pulse per second (PPS)to onePPS

and either open or close valve. Each LED should

lightsequentiallyuntilallfourarelit.AnyLEDfail-

ing to light indicatesan open on that leg which indi-

catesapoorconnectionoranopencoil.Repairorre-

place as required to achieve proper operation.

CAUTION

The scroll compressor achieves low suction

pressure very quickly. Do not operate the

compressorinadeepvacuum, internaldam-

age will result.

3. Restartunit, setthesteprateto200PPS onSMA-12

forthevalve,andclosesteppervalvewhilewatching

the suction gauge. Within one minute the suction

pressurewillgointoavacuum.Thisisanindication

that the valve is moving.

4. If no change in suction pressure is detected, check

for resistance (refer to step 6.20.2), and check con-

nectionsforpropercontinuityandretest.Ifthevalve

is functioning and all connections and motor resist-

ance are good, check the controller and expansion

module.

CAUTION

DONOTdisassemblepistonfromNEWsuc-

tion modulating valve powerhead assembly.

Doing so may result in damage to piston.

5. If thevalve is determined as faulty after completing

theabovesteps,performalowsidepumpdown.Re-

movevalvepowerheadassembly,andreplacewitha

NEWvalvepowerheadassembly,torquenutto35ft-

lb, evacuate low side, and open all service valves.

6.21 CONTROLLER AND EXPANSION MODULE

6.21.1 Handling Modules

CAUTION

Do not remove wire harnesses from module

unless you are grounded to the unit frame

with a static safe wrist strap.

CAUTION

Unplug all module connectors before per-

forming arc welding on any part of the con-

tainer.

The guidelines and cautions provided herein should be

followed when handling the modules. These

precautions and procedures should be implemented

when replacing a module, when doing any arc welding

on the unit, or when service to the refrigeration unit

requires handling and removal of a module.

6-15 T-309

1. Controller Software

Programming Port

2. Mounting Screw

3. Controller

4. Expansion Module

5. Test Points

Figure 6-18 Controller Section of the Control Box

a. Obtain a grounding wrist strap (Carrier Transicold

part number 07--00--304--00)and a static dissipation

mat (Carrier Transicold part number 07--00304--00.

The wrist strap, when properly grounded, will dissi-

pate any potential buildup on thebody. The dissipa-

tion mat will provide a static-free work surface on

which to place and/or service the modules.

b. Disconnect and secure power to the unit.

c. Placestrap on wrist and attach the ground end to any

exposed unpainted metal area on the refrigeration

unit frame (bolts, screws, etc.).

d. Carefullyremovethemodule.Donottouchanyofthe

electrical connections if possible. Place the module

on the static mat.

e. Thestrapshould bewornduringanyserviceworkon

a module, even when it is placed on the mat.

6.21.2 Controller Trouble-Shooting

Agroupoftestpoints(TP,seeFigure 6-18)areprovided

on the controller for trouble-shooting electrical circuits

(seeschematicdiagram, section7).Adescriptionofthe

test points follows:

NOTE

Use a digital voltmeter to measure ac voltage

between TP’s and ground (TP9), except for

TP8.

TP1

Thistestpointenablestheusertocheckifthecontroller

unloader solenoid valve relay (TU) is open or closed.

TP2

This test point enables the user to check if the high

pressure switch (HPS) is open or closed.

TP3

This test point enables the user to check if the water

pressure switch (WP) contact is open or closed.

TP 4

This test point enables the user to check if the internal

protectorforthecondenserfanmotor(IP-CM)isopenor

closed.

TP 5

This test point enables the user to check if the internal

protectors for the evaporator fan motors (IP-EM1 or

IP-EM2) are open or closed.

TP 6

This test point is not used in this application.

TP 7

Thistestpointenablestheusertocheckifthecontroller

economizer solenoid valve relay (TS) is open or closed

TP 8

This test point enables the user to check power to the

suction modulator valve.

TP 9

This test point is the chassis (unit frame) ground

connection.

TP 10

This test point enables the user to check if the heat

terminationthermostat(HTT)contactisopenorclosed.

6.21.3 Controller Programming Procedure

Toloadnewsoftwareintothemodule,theprogramming

card is inserted into the programming/software port.

CAUTION

The unitmustbeOFFwheneveraprogram-

ming card is inserted or removed from the

controller programming port.

NOTE

Themetal door on theprogramming card must

be facing to the left when inserting.

a. Procedure for loading Operational Software

1. Turn unit OFF, via start-stop switch (ST).

2. Insert the programming card for Operational Soft-

ware into the programming/software port. (See

Figure 6-18)

3. Turn unit ON, via start-stop switch (ST).

4. The Display module will alternate back and forth

between the messages “rEV XXXX” and “Press

EntR”. (If a defective card is being used theDisplay

will blink the message “bAd CArd”. Turn start-stop

switch OFF and remove the card.)

6-16T-309

5. Press the ENTER key on the keypad.

6. TheDisplaywillshowthemessage“ProSoFt.”This

message will last for up to one minute.

7. The Display modulewill read “Pro donE” when the

software loading has loaded. (If a problem occurs

while loading the software: the Display will blink

the message “Pro FAIL” or “bad 12V”. Turn start-

stop switch OFF and remove the card.)

8. Turn unit OFF, via start-stop switch (ST).

9. Remove the programming card from the program-

ming/softwareportandreturntheunitto normalop-

eration by placing the start-stop switch in the ON

position.

b. Procedure for loading Configuration Software

1. Turn unit OFF using start-stop switch (ST).

2. Insert the programming card, for Configuration

Software, into theprogramming/software port. (See

Figure 6-18.)

3. Turn unit ON using start-stop switch (ST).

4. The Display module will show “nt40” on the left

LCD display and “531###” on the right LCD dis-

play.“###”willindicatethedashnumberforagiven

unit modelnumber, usethe UP orDOWNARROW

key to scroll through the list to obtain the proper

model dash number. For example, to program a

model number 69NT40-531-05, press the UP or

DOWN ARROW key until the right display shows

“nt40” on the right display and “53105” on the left.

(If a defective card is being used, the Display will

blink the message “bAd CArd”. Turn start-stop

switch OFF and remove the card.)

5. Press the ENTER key on the keypad.

6. When the software loading has successfully com-

pleted, the Display will show the message “EEPrM

donE.” (If a problem occurs while loading the soft-

ware,theDisplaywillblinkthemessage“ProFAIL”

or “bad 12V.” Turn start-stop switch OFF and

remove the card.)

7. Turn unit OFF using start-stop switch (ST).

8. Remove the programming card from the program-

ming/softwareportandreturntheunitto normalop-

eration by placing the start-stop switch in the ON

position.

6.21.4 Removing and Installing a Module

a. Removal:

1. Disconnect all front wire harness connectors and

move wiring out of way.

2 The lower controller mounting isslotted, loosen the

topmountingscrew(seeFigure 6-18)andliftupand

out.

3 Disconnectthebackconnectorsandremovemodule.

4 When removing the replacement module from its

packaging,notehowitispackaged.Whenreturning

the old module for service, place it in the packaging

in thesamemanneras thereplacement. Thepackag-

ing has been designed to protect the module from

both physical and electrostatic discharge damage

during storage and transit.

b.Installation:

Install the module by reversing the removal steps.

Torque values for mounting screws (item 2, see

Figure 6-18) are 0.23 mkg (20 inch-pounds). Torque

value for the connectors is 0.12 mkg (10 inch-pounds).

6.22 TEMPERATURE SENSOR SERVICE

Procedures for service of the Return Recorder, Return

Temperature, Supply Recorder, Supply Temperature,

Ambient, Defrost Temperature, Compressor Discharge

and Compressor Suction temperature sensors are

provided in the following sub paragraphs.

6.22.1 Sensor Checkout Procedure

Sensor 40 mm (1 1/2 inch)

6.3 mm (1/4 inch)

Mounting Stud Type

Sensor 40 mm (1-1/2 inches)

6.3 mm (1/4 inch)

Bulb Type

Dual Sensor 40 mm (1-1/2 inches)

6.3 mm (1/4 inch)

Figure 6-19 Sensor Types

To check a sensor reading, do the following:

a. Removethesensorandplaceina0_C(32_F)ice-wa-

ter bath. The ice-water bath is prepared by filling an

insulated container (of sufficient size to completely

immersebulb)withicecubesorchippedice,thenfill-

ing voids between ice with water and agitating until

mixture reaches 0_C(32_F) measured on a labora-

tory thermometer.

b. Start unit and check sensor reading on the control

panel.Thereadingshouldbe0_C(32_F). If theread-

ing is correct, reinstall sensor; if it is not, continue

with the following.

c. Turn unit OFF and disconnect power supply.

d. Refertoparagraph6.21andremovecontrollertogain

access to the sensor plugs.

6-17 T-309

Table 6-2 Sensor Temperature/Resistance Chart

(+/--.002%)

Temperature Resistance

_C_

_F(Ohms)

AMBS,

CPSS,

DTS, RTS,

RRS, STS,

SRS

CPDS

-- 3 0 -- 2 2 177,000 1,770,000

-- 2 5 -- 1 3 130,400 1,340,000

-- 2 0 -- 4 97,070 970,700

-- 1 5 5 72,900 729,000

-- 1 0 14 55,330 553,000

-- 5 23 43,200 423,300

0 32 32,650 326,500

5 41 25,390 253,900

10 50 19,900 199,000

15 59 15,700 157,100

20 68 12,490 124,900

25 77 10,000 100,000

30 86 8,060 80,600

35 95 6,530 65,300

40 104 5,330 53,300

45 113 4,370 43,700

50 122 3,600 36,000

55 131 2,900 29,000

60 140 2,490 24,900

65 149 2,080 20,800

65 158 1,750 17,500

e. Using the plug connector marked “EC”, that is con-

nected to the back ofthe controller, locate thesensor

wires (RRS, RTS, SRS, STS, AMBS, DTS, CPDS

ORCPSSasrequired).Followthosewirestothecon-

nector and using the pins of the plug, measure the

resistance. Values are provided in Table 6-2.

Dueto thevariations andinaccuraciesinohmmeters,

thermometers or other test equipment, a reading

within 2% of the chart value would indicate a good

sensor. Ifa sensor is defective, the resistancereading

will usually be much higher or lower than the resis-

tance values given.

6.22.2 Sensor Replacement

a. Turn unit power OFF, disconnect power supply and

remove sensor assembly from unit.

b. Cut wire(s) 5 cm (2 inches) from shoulder of defec-

tive sensor and discard the defective probe only.

c. Cut one wire of existing cable 40 mm (1-1/2 inch)

shorter than the other wire.

d. Cut one replacement sensor wire (opposite color)

back 40 mm (1-1/2 inch). (See Figure 6-19.)

e. Stripbackinsulationonallwiring6.3mm(1/4inch).

f. Slide a large piece of heat shrink tubing over the

cable, and place the two small pieces of heat shrink

tubing, one over each wire, before adding crimp fit-

tings as shown in Figure 6-20.

Sensor (Typical)

Cable Heat Shrink

Tubing (3)

Large Heat Shrink

Tubing (1)

Figure 6-20 Typical Sensor and Cable Splice

g. Slip crimp fittings over dressed wires (keeping wire

colors together). Make sure wires are pushed into

crimpfittingsasfaraspossibleandcrimpwithcrimp-

ing tool.

h. Solder spliced wires with a 60% tin and 40% lead

Rosincore solder.

i. Slide heat shrink tubing over splice so that ends of

tubing cover both ends of crimp as shown in

Figure 6-20.

j. Heattubingtoshrinkoversplice.Makesureallseams

are sealed tightly against the wiring to prevent mois-

ture.

k. Slide large heat shrink tubing over both splices and

shrink.

CAUTION

Do not allow moisture to enter wire splice

area as this may affect the sensor resistance.

l. Position sensor in unit as shown in m.Figure 6-21

Slip crimp fittings over dressed wires (keeping wire

colors together). Make sure wires are pushed into

crimp fittings as far as possible and crimp with

crimping tool. and re--check sensor resistance.

n. Reinstall sensor, refer to paragraph 6.22.3.

NOTE

The P5 Pre-Trip test must be run to inactivate

probe alarms (refer to paragraph 4.7).

6-18T-309

SRS probe

STS probe

Supply

Air

Stream

Mounting

Clamp

Supply Sensor

Sensor

Wires

Back Panel

2.5” Drip Loop

T.I.R. Bolts

Gasketed

Support

Plate

Gasket

Mounting

Plate

Insulation

Gasketed

Cover

Figure 6-21 Supply Sensor Positioning

6.22.3 Sensor Re--Installation

a. Sensors STS and SRS

Toproperlypositionasupplysensor,thesensormustbe

fully inserted into the probe holder. Do not allow heat

shrink covering to contact the probeholder. For proper

placement ofthesensor, besure topositiontheenlarged

positioning section of the sensor against the the side of

the mounting clamp. This positioning will give the

sensor the optimum amount of exposure to the supply

air stream, and will allow the Controller to operate

correctly. See Figure 6-21.

b Sensors RRS and RTS

ReinstallthereturnsensorasshowninFigure 6-22.For

proper placement of the return sensor, be sure to

position the enlarged positioning section of the sensor

against the the side of the mounting clamp.

Return Sensor

Mounting

Clamp 1.50 in.

(38.1cm)

Figure 6-22 Return Sensor Positioning

c Sensor DTS

The DTS sensor must have insulating material placed

completely over the sensor to insure the coil metal

temperature is sensed.

6.23 MAINTENANCE OF PAINTED SURFACES

The refrigeration unit is protected by a special paint

system against the corrosive atmosphere in which it

normallyoperates.However,shouldthepaintsystembe

damaged,thebasemetalcancorrode.Inordertoprotect

the refrigeration unit from the highly corrosive sea

atmosphere, or if the protective paint system is

scratched or damaged, clean area to bare metal using a

wirebrush,emerypaperorequivalentcleaningmethod.

Immediately following cleaning, apply 2--part epoxy

paint to the area. and allow to dry. After the first coat

dries, apply a second coat.

6.24 COMPOSITE CONTROL BOX REPAIRS

6.24.1 Introduction

This procedure provides instructions for repair of the

Carrier Transicold composite control box. Damage to

the control box may be in the form of a chip or hole, a

crack, a damaged thread insert or damage to the door

hingeinserts.Generally,theobjectoftherepairmustbe

to ensuresufficient strength is restored to the damaged

area and the repair must keep the box water tight.

Informationonrepairkitsandrepairproceduresforeach

typeofdamageisprovidedinthefollowingparagraphs.

Ambient temperature must be above 7°C(45°F) for

proper curing of epoxy repairs.

6-19 T-309

6.24.2 Cracks

Cracksinthecontrol boxarerepairedusingafiberglass

patch over the damaged area. Materials required are

includedintheFiberglassPatchKitsuppliedwithCrack

Repair Kit, Carrier Transicold part number

76-00724-00SV (see Table 6-3).

a. The surface must be clean and dry. Roughen the sur-

face with sandpaper to ensure a good bond.

b. Cut the fiberglass cloth to allow a 25mm (1--inch)

overlap around the area to be repaired.

c. Stretch and position the cloth over the area to be re-

paired and secure it with masking tape.

d. Make up sufficient epoxy glue to cover the cloth by

mixingequalpartsofresinandhardener. Saturatethe

cloth with the epoxy glue, spreading evenly.

e. Remove the tape and overlap the edge of the cloth

approximately 6 to 12 mm (1/4” to 1/2”) with glue.

f. Epoxy will dry in 45--60 minutes. When completely

cured (12 hours), use sandpaper to smooth edges of

the patch.

6.24.3 Chips And Holes

Chips and holes in the control box are repaired using a

piece of aluminum or stainless steel to cover the

damagedarea.Thematerialcanbecuttosuitandriveted

in place. An adhesive sealant must be used to make the

repairwatertight.Theadhesivesealant(Sikaflex221)is

included in Crack Repair Kit Carrier Transicold part

number76-00724-00SV(seeTable 6-3).Donotusean

acetone based silicone sealant (Which can be

identified by a vinegar--like odor).

a. To make up the patch, cut a piece of aluminum or

stainlesssteelsothatitwill overlapthedamagedarea

by at least 40 mm (1 1/2”) on all sides.

b. Choose rivet locations and drill the rivet holes in the

correspondinglocationsonthecontrolboxandpatch

piece.

c. Apply the adhesive sealant around the damaged area

to form a seal between the control box and the patch

piece.

d. Rivet the patch piece in place.

e. File smooth any rough edges (including rivets) that

may come into contact with wires.

6.24.4 Inserts

The threaded brass inserts that are molded into the

control box will need to be replaced if the threads

become stripped, or if the insert becomes loose. The

inserts and epoxy are contained in repair kit, Carrier

Transicold part number 76-50084-00 (see Table 6-4).

There are 6 different inserts used in the control box.

Refer to Figure 6-24 for the locations of the various

inserts.

NOTE

Anepoxyapplicationgunisalsoneeded,Carri-

er Transicold part number 07 -- 00391 -- 00.

The damaged insert must be removed from the control

box. Table 6-5 identifies the drill size and drill depthto

beusedforeachinsert.Astopringshouldbeusedonthe

drill bit to limit the depth.

a. Center the drill bit on the insert and drill to the pre-

scribed depth.

b. Remove the chips from the drilled hole.

c. Mix the two component epoxy and fill the hole 1/2

way to the top with epoxy.

d. Press the insert in until it is flush with the surface.

e. Wipe away any excess epoxy. The part is ready for

service after the bond material has hardened and is

tack free (approximately 20 minutes)

6.24.5 Door Hinge Inserts

Ifthedoorhingeshavebeenpulledfromthecontrolbox

drillandreinstallthehingeasshowninFigure 6-23and

described in the following steps.

Figure 6-23 Door Hinge Repair

Materials needed:

1. Cut two square pieces of 3 mm thick (1/8 inch) alu-

minum or stainless steel approximately 40 mm (1

5/8”) square. These squares will serve as backing

plates.

2. Two nuts, bolts (10 -- 24 x 1”) and washers for each

insert that needs repair.

a. Drill a 1/4” hole in the center of each square backing

plate.

b. Pass the bolts through the bolts holes in the door

hinge, then through the control box at the location

where the hinge insert pulled out.

c. From inside the control box, slide the backingplates

over the bolts and secure in place with the washers

and nuts.

6-20T-309

Table 6-3 Crack, Chip & Hole Repair Kit

ITEM DESCRIPTION PART NUMBER Qty

1Crack Repair Kit -- Includes 76--00724--00SV 1

2Fiberglass Patch Kit (Loctite FK--98 or 80265)... 76--00724--00Z 10

3Sikaflex 221 Adhesive Sealant (Sikaflex 232--361)... 02--00067--02Z 10

4Instruction Sheet... 98--02339--00 10

Table 6-4 Insert Repair Kit

ITEM DESCRIPTION PART NUMBER Qty

1Insert Repair Kit -- Includes 76--50084--00 1

2Insert - 17.53 x 9.91 mm (..690 x .390 in) 1/4--20 Threads... 34--06231--01 10

3Insert - 15.88 x 6.35 mm (.625 x .250 in) 10-24 Threads... 34--06231--03 10

4Insert - 25.15 x 7.54 mm (.990 x .297 in) 10-24 Threads... 34--06231--04 10

5Insert - 10.16 x 9.53 mm (.400 x .375 in) 10-24 Threads... 34--06231--05 10

6Insert - 12.7 x 9.91 mm (.5 x .390 in) 1/4--20 Threads... 34--06231--06 10

7Insert - 9.53 x 6.76 mm (.375 x .266 in) 10-24 Threads... 34--06231--07 10

8Durabond Epoxy E20--HP (Loctite 29314)... 02--0082--00 1

9Static Mixing Tube (Loctite 983440)... 07--00390--00 1

10 Instruction Sheet... 98--02338--00 1

Note: Insert repair procedures require use of an Application Gun, Carrier part number 07--00391--00

Table 6-5 Drill Information

Item Insert part number Drill size and depth

1 34- 06231- 01 10.3 mm x 17.8 mm deep (.404 in. x .700 in. deep)

2 34- 06231- 03 6.8 mm x 16.3 mm deep (.266 in. x .640 in. deep)

3 34- 06231- 04 7.9 mm x 25.4 mm deep (.3125 in. x 1.0 in. deep)

4 34- 06231- 05 6.9 mm (.270 in.) Drill completely through.

5 34- 06231- 06 10.3 mm (.404 in.) Drill completely through.

6 34- 06231- 07 6.8 mm (.266 in.) Drill completely through.

6-21 T-309

INSERT PART NUMBERS 34--06231--## WHERE THE ## IS AS INDICATED

Figure 6-24. Insert Location

6-22T-309

6.25 COMMUNICATIONS INTERFACE MODULE

INSTALLATION

Communications

interface Module

CB1

Figure 6-25. Communications Interface

Installation

Units with communication interface module provision

havetherequiredwiringinstalled.Theprovisionwiring

kit (part number 76--00685--00), includes three

pre--addressed wires installed between the circuit

breakerandcommunicationinterfacemodulelocations.

These wires are to be connected to the module and

circuit breaker to allow the module to communicate

over the power system. To install the module, do the

following:

WARNING

The Unit Power Plug Must Be Disconnected

To Remove Power From Circuit Breaker

Cb1

a.. CB1 is connected to the power system, see wiring

schematic. Ensure that the unit power is off AND

that the unit power plug is disconnected.

b.. Open control box, see Figure 6-25 and removelow

voltage shield. Open high voltage shield.

c.. Remove the circuit breaker panel, with circuit

breaker, from the control box.

d.. Locate, wires CB21/CIA3, CB22/CIA5 and

CB23/CIA7 that have been tied back in the wire

harness.Removetheprotectiveheatshrinkfromthe

ends of the wires.

e.. Attach the three wires as addressed to the LOAD

side of the circuit breaker.

f.. Refit the circuit breaker panel.

g. Fit the new RMU into the unit.

h. Remove plugs CIA, CIB and CID from the wiring

harness and attach to the module.

.i. Replace the low voltage shield.

Table 6-6 Recommended Bolt Torque Values

BOLT DIA. THREADS TORQUE MKG

FREE SPINNING

#10

1/4

5/16

3/8

7/16

1/2

9/16

5/8

3/4

5.2 in-lbs

9.6 in-lbs

20 in-lbs

23 in-lbs

75 in-lbs

11 ft-lbs

20 ft-lbs

31 ft-lbs

43 ft-lbs

57 ft-lbs

92 ft-lbs

124 ft-lbs

0.05

0.11

0.23

0.26

0.86

1.52

2.76

4.28

5.94

7.88

12.72

17.14

NONFREE SPINNING (LOCKNUTS ETC.)

1/4

5/16

3/8

7/16

1/2

9/16

5/8

3/4

82.5 in-lbs

145.2 in-lbs

22.0 ft-lbs

34.1 ft-lbs

47.3 ft-lbs

62.7 ft-lbs

101.2 ft-lbs

136.4 ft-lbs

0.95

1.67

3.04

4.71

6.54

8.67

13.99

18.86

6-23 T-309

Table 6-7 R-134a Temperature - Pressure Chart

Temperature Vacuum

_F_

_C “/hg cm/hg kg/cm@

@bar

-- 4 0 -- 4 0 14.6 49.4 37.08 0.49

.35 .37 12.3 41.6 31.25 0.42

-- 3 0 -- 3 4 9.7 32.8 24.64 0.33

-- 2 5 -- 3 2 6.7 22.7 17.00 0.23

-- 2 0 -- 2 9 3.5 11.9 8.89 0.12

-- 1 8 -- 2 8 2.1 7.1 5.33 0.07

-- 1 6 -- 2 7 0.6 2.0 1.52 0.02

Temperature Pressure

_F_

_Cpsig kPa kg/cm@

@bar

-- 1 4 -- 2 6 0.4 1.1 0.03 0.03

-- 1 2 -- 2 4 1.2 8.3 0.08 0.08

-- 1 0 -- 2 3 2.0 13.8 0.14 0.14

-- 8 -- 2 2 2.9 20.0 0.20 0.20

-- 6 -- 2 1 3.7 25.5 0.26 0.26

-- 4 -- 2 0 4.6 31.7 0.32 0.32

-- 2 -- 1 9 5.6 36.6 0.39 0.39

0-- 1 8 6.5 44.8 0.46 0.45

2-- 1 7 7.6 52.4 0.53 0.52

4-- 1 6 8.6 59.3 0.60 0.59

6-- 1 4 9.7 66.9 0.68 0.67

8-- 1 3 10.8 74.5 0.76 0.74

10 -- 1 2 12.0 82.7 0.84 0.83

12 -- 11 13.2 91.0 0.93 0.91

14 -- 1 0 14.5 100.0 1.02 1.00

16 -- 9 15.8 108.9 1.11 1.09

18 -- 8 17.1 117.9 1.20 1.18

20 -- 7 18.5 127.6 1.30 1.28

22 -- 6 19.9 137.2 1.40 1.37

24 -- 4 21.4 147.6 1.50 1.48

26 -- 3 22.9 157.9 1.61 1.58

Temperature Pressure

_F_

_Cpsig kPa kg/cm@

@bar

28 -- 2 24.5 168.9 1.72 1.69

30 -- 1 26.1 180.0 1.84 1.80

32 0 27.8 191.7 1.95 1.92

34 1 29.6 204.1 2.08 2.04

36 2 31.3 215.8 2.20 2.16

38 3 33.2 228.9 2.33 2.29

40 4 35.1 242.0 2.47 2.42

45 7 40.1 276.5 2.82 2.76

50 10 45.5 313.7 3.20 3.14

55 13 51.2 353.0 3.60 3.53

60 16 57.4 395.8 4.04 3.96

65 18 64.1 441.0 4.51 4.42

70 21 71.1 490.2 5.00 4.90

75 24 78.7 542.6 5.53 5.43

80 27 86.7 597.8 6.10 5.98

85 29 95.3 657.1 6.70 6.57

90 32 104.3 719.1 7.33 7.19

95 35 114.0 786.0 8.01 7.86

100 38 124.2 856.4 8.73 8.56

105 41 135.0 930.8 9.49 9.31

110 43 146.4 1009 10.29 10.09

115 46 158.4 1092 11.14 10.92

120 49 171.2 1180 12.04 11.80

125 52 184.6 1273 12.98 12.73

130 54 198.7 1370 13.97 13.70

135 57 213.6 1473 15.02 14.73

140 60 229.2 1580 16.11 15.80

145 63 245.6 1693 17.27 16.93

150 66 262.9 1813 18.48 18.13

155 68 281.1 1938 19.76 19.37

7-1 T-309

SECTION 7

ELECTRICAL WIRING SCHEMATIC

7.1 INTRODUCTION

This section contains the Electrical Schematics and Wiring Diagrams. The diagrams are presented as follows:

Figure 7-1 Provides the legend for use with all figures.

Figure 7-2 Provides the basic schematic diagram.

Figure 7-3 Provides the basic wiring diagram.

Sequence of operation descriptions for the various modes of operation are provided in paragraph 4.9

SYMBOL DESCRIPTION (Schematic Location)

AMBS AMBIENT SENSOR (C--21)

C CONTROLLERS (H-21, H-23)

CB1 CIRCUIT BREAKER -- 460 VOLT (J--1)

CB2 CIRCUIT BREAKER -- AUTOTRANSFORMER (C--1)

CF CONDENSER FAN CONTACTOR (M--12, N--5)

CI COMMUNICATIONS INTERFACE MODULE (A--3)

CL COOL LIGHT (J--7)

CM CONDENSER FAN MOTOR (H--12, T-5)

CP COMPRESSOR MOTOR (T--1)

CPDS COMPRESSOR DISCHARGE SENSOR (A--22)

CPSS COMPRESSOR SUCTION SENSOR (D--21)

CR CHART RECORDER [TEMPERATURE RECORDER]

(K-16)

CS CURRENT SENSOR (M--1)

DHBL DEFROST HEATER -- BOTTOM LEFT (T--4)

DHBR DEFROST HEATER -- BOTTOM RIGHT (R--4)

DHTL DEFROST HEATER -- TOP LEFT (T--4)

DHTR DEFROST HEATER -- TOP RIGHT (R--4)

DL DEFROST LIGHT (J--6)

DPT DISCHARGE PRESSURE TRANSDUCER (J--22)

DTS DEFROST TEMPERATURE SENSOR (B--22)

DVM DUAL VOLTAGE MODULE (D--1)

DVR DUAL VOLTAGE RECEPTACLE (F--1)

E1 EVAPORATOR FAN CONTACTOR [HIGH]

(L--13,L--14,P--7,P--10)

EM EVAPORATOR FAN MOTOR (E--13,G--13,T--8,T--11)

ES EVAPORATOR FAN CONTACTOR [LOW]

( M -- 14 , P -- 7, P -- 11 )

ESV ECONOMIZER SOLENOID VALVE (K--17)

F FUSE (C--6,D--20,E--20,H--4)

FLA FULL LOAD AMPS

HPS HIGH PRESSURE SWITCH (G--11)

HR HEATER CONTACTOR (L--15, N--3)

HS HUMIDITY SENSOR (F--21)

HTT HEAT TERMINATION THERMOSTAT (G--15)

IC INTERROGATOR CONNECTOR [FRONT/REAR]

(P--22,P--21)

IP INTERNAL PROTECTOR (E--13,G--13,H--12)

IRL IN RANGE LIGHT (J8)

LIV LIQUID INJECTION SOLENOID VALVE (K-18)

MDS MANUAL DEFROST SWITCH (E--19)

LEGEND

SYMBOL DESCRIPTION (Schematic Location)

ORV OIL RETURN SOLENOID VALVE (N--24, H-9)

PA COMPRESSOR PHASE CONTACTOR (L--11,M--10,P1)

PB COMPRESSOR PHASE CONTACTOR (L--10,M--11,P2)

PR PROBE RECEPTACLE [USDA]

D--21,L--22,M--22)

RM REMOTE MONITORING RECEPTACLE

(J-6,J--7,K--6,K--7,K--8)

RRS RETURN RECORDER SENSOR (K--21)

RTS RETURN TEMPERATURE SENSOR (B--21)

SMV SUCTION MODULATING VALVE (K--24)

SPT SUCTION PRESSURE TRANSDUCER (H--21)

SRS SUPPLY RECORDER SENSOR (K--22)

ST START -- STOP SWITCH (K--4)

STS SUPPLY TEMPERATURE SENSOR (A--21)

TCC TransFRESH COMMUNICATIONS

CONNECTOR (D-4)

TD CONTROLLER RELAY -- COOLING (H11)

TE CONTROLLER RELAY -- HIGH

SPEED EVAPORATOR FANS

(K--13)

TFC TransFRESH CONTROLLER (G--5)

TH CONTROLLER RELAY -- HEATING (K--15)

TN CONTROLLER RELAY -- CONDENSER FAN (K--12)

TP TEST POINT (F--17,G--12,H--11,J--12,

J--13,J--15,M--19)

TR TRANSFORMER (M--3)

TRANS AUTO TRANSFORMER 230/460 (D--1)

TRC TransFRESH REAR CONNECTOR (E--5)

TS CONTROLLER RELAY -- ECONOMIZER SOLENOID

VALVE (E--17)

TT CONTROLLER RELAY -- COOLING (C--11)

TU CONTROLLER RELAY -- UNLOADER SOLENOID

VALVE (E--16)

TV CONTROLLER RELAY -- LOW SPEED EVAPORATOR

FANS (K--14)

T1 CONTROLLER RELAY -- RM COOL (G--7)

T2 CONTROLLER RELAY -- RM DEFROST (G--6)

T4 CONTROLLER RELAY -- RM INRANGE (G--8)

T6 CONTROLLER RELAY -- COMPRESSOR PHASE

SEQUENCING (K--10,K--11)

USV UNLOADER SOLENOID VALVE (K--16)

WP WATER PRESSURE SWITCH (E--12)

Figure 7-1 LEGEND

7-2T-309

Figure 7-2 SCHEMATIC DIAGRAM

7-3 T-309

Figure 7-3 WIRING DIAGRAM (Sheet 1 of 2)

7-4T-309

Figure 7-3 WIRING DIAGRAM (Sheet 2 of 2)

Index-1 T-309

INDEX

Air Cooled Condenser Section, 2-4

Alarm, 3-6, 3-10, 3-12, 3-17, 3-27

Battery, 1-1

Capacitors, 6-12

Checking Superheat, 6-9

Communications, 1-1

Communications Interface Module, 3-11, 6-21

Compressor, 1-1, 6-5

Compressor Phase Sequence, 4-5

Compressor Section, 2-3

Condenser Coil, 1-1, 6-8

Condenser Fan, 6-8

Configuration Identification, 1-1

Configuration Software, 3-3, 3-8

Configuration Variables, 3-13

Control Box, 1-1, 2-5, 6-18

Controller, 3-3, 6-14

Controller Software, 3-3

DataCORDER, 3-7, 3-10, 4-2

DataCORDER Software, 3-7

DataReader, 3-11

DataView, 3-11

Defrost Interval, 3-4

Defrost Mode, 4-7

Dehumidification, 1-1

Display Module, 3-2

Evacuation, 6-3

Evaporator, 6-10

Evaporator Fan, 6-12

Evaporator Section, 2-2

Expansion Module, 3-1, 6-14

Expansion Valves, 6-10

Failure Action, 3-4

Filter--Drier, 6-8

Fresh Air Makeup, 2-1, 4-1

Frozen Mode, 4-6

Frozen Mode -- Conventional, 3-6

Frozen Mode -- Economy, 3-6

Function Code, 3-14, 3-25

General Description, 2-1

Generator Protection, 3-4

Heat Lockout, 3-4, 3-6

Heater, 6-10

Heating Mode, 4-6

High Pressure Switch, 6-7

Inspection, 4-1, 4-2

Interrogator, 1-1

Introduction, 1-1

Index-2

T-309

INDEX

Key Pad, 3-2

Leak Checking, 6-3

Logging Interval, 3-10

Manifold Gauge Set, 6-1

Microporcessor System, 3-1

Modes Of Operation, 3-4

Oil, 6-7

Operational Software, 3-4, 3-7

Option Descriptions, 1-1

Painted Surfaces, 6-17

Perishable Mode -- Bulb, 3-5

Perishable Mode -- Conventional, 3-4

Perishable Mode -- Dehumidification, 3-5

Perishable Mode -- Economy, 3-5

Power, 4-1

Pre--Trip, 3-7, 3-10, 3-21, 3-26, 4-2

Pressure Readout, 1-1

Probe Check, 4-3

Pumping Down, 6-2

Refrigerant Charge, 6-4

Refrigeration Circuit, 2-10

Refrigeration System Data, 2-6

Refrigeration Unit -- Front Section, 2-1

Remote Monitoring, 1-1

Safety and Protective Devices, 2-8

Sampling Type, 3-10

Scroll Back , 3-10

Sensor Configuration, 3-8

Sequence Of Operation, 4-5

Service Valves, 6-1

Solenoid Valves, 6-10

Starting, 4-2

Stopping, 4-2

Suction Modulating Valve, 6-13

Temperature Control, 3-4, 3-6

Temperature Sensor, 6-17

Thermistor Format, 3-10

Torque Values, 6-21

Upper Air, 1-2

Valve Override Controls, 6-12

Wiring Schematic, 7-1

Carrier Streamline Scroll 69Nt20 531 300 Users Manual

69NT20-531-300 to the manual 8fc7d515-9b87-4f39-8beb-1d381b46bd70

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