Carrier Aquasnap Mpw015 045 Users Manual 30mp 1t

MPW015-045 to the manual e4caf960-1c0b-41e1-ab66-8d37e842de62

2015-01-24

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AQUASNAP®
30MPA,MPW015-045
Liquid Chillers with Scroll Compressors
and ComfortLink™ Controls

Controls, Start-Up, Operation,
Service, and Troubleshooting
SAFETY CONSIDERATIONS
Installing, starting up, and servicing this equipment can be
hazardous due to system pressures, electrical components, and
equipment location (elevated structures, mechanical rooms,
etc.). Only trained, qualified installers and service mechanics
should install, start up, and service this equipment.
When working on this equipment, observe precautions in
the literature, and on tags, stickers, and labels attached to the
equipment, and any other safety precautions that apply. Follow
all safety codes. Wear safety glasses and work gloves. Use
care in handling, rigging, and setting this equipment, and in
handling all electrical components.

WARNING
Electrical shock can cause personal injury and death. Shut
off all power to this equipment during installation. There
may be more than one disconnect switch. Tag all disconnect locations to alert others not to restore power until work
is completed.

WARNING
DO NOT VENT refrigerant relief valves within a building.
Outlet from relief valves must be vented outdoors in
accordance with the latest edition of ANSI/ASHRAE
(American National Standards Institute/American Society
of Heating, Refrigerating and Air Conditioning Engineers)
15 (Safety Code for Mechanical Refrigeration). The
accumulation of refrigerant in an enclosed space can
displace oxygen and cause asphyxiation. Provide adequate
ventilation in enclosed or low overhead areas. Inhalation of
high concentrations of vapor is harmful and may cause
heart irregularities, unconsciousness or death. Misuse can
be fatal. Vapor is heavier than air and reduces the amount
of oxygen available for breathing. Product causes eye and
skin irritation. Decomposition products are hazardous.

CAUTION
This unit uses a microprocessor-based electronic control
system. Do not use jumpers or other tools to short out
components, or to bypass or otherwise depart from recommended procedures. Any short-to-ground of the control
board or accompanying wiring may destroy the electronic
modules or electrical components.

CAUTION
To prevent potential damage to heat exchanger, always run
fluid through heat exchanger when adding or removing
refrigerant charge. Use appropriate brine solutions in cooler
fluid loop to prevent the freezing of brazed plate heat
exchanger when the equipment is exposed to temperatures
below 32 F (0° C). Proof of flow switch is factory installed
on all models. Do NOT remove power from this chiller during winter shutdown periods without taking precaution to
remove all water from heat exchanger and optional
hydronic system. Failure to properly protect the system
from freezing may constitute abuse and may void warranty.

CAUTION
Compressors require specific rotation. Monitor control
alarms during first compressor start up for reverse rotation
protection. Damage to unit may result.

CAUTION
Refrigerant charge must be removed slowly to prevent loss
of compressor oil that could result in compressor failure.

CAUTION
WARNING
DO NOT attempt to unbraze factory joints when servicing
this equipment. Compressor oil is flammable and there is
no way to detect how much oil may be in any of the
refrigerant lines. Cut lines with a tubing cutter as required
when performing service. Use a pan to catch any oil that
may come out of the lines and as a gage for how much oil
to add to system. DO NOT re-use compressor oil. Damage
to equipment or personal injury may result.

Puron® refrigerant (R-410A) systems operate at higher
pressures than standard R-22 systems. Do not use R-22 service equipment or components on Puron refrigerant equipment. If service equipment is not rated for Puron
refrigerant, equipment damage or personal injury may
result.

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53300053-01
Printed in U.S.A.
Form 30MP-1T
Pg 1
1-10
Replaces: New

• MINIMUM LOAD VALVE
• PRESSURE RELIEF DEVICES
Check Unit Safeties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thermistors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pressure Transducers . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chilled Water Flow Switch . . . . . . . . . . . . . . . . . . . . . . . . .
Strainer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

CONTENTS

Page
SAFETY CONSIDERATIONS. . . . . . . . . . . . . . . . . . . . . . . . . 1
GENERAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13
Conventions Used in this Manual . . . . . . . . . . . . . . . . . . . 2
Basic Controls Usage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-33
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Main Base Board (MBB). . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Energy Management Module (EMM). . . . . . . . . . . . . . . . 14
Current Sensor Board (CSB) . . . . . . . . . . . . . . . . . . . . . . . 14
Enable/Off/Remote Contact Switch. . . . . . . . . . . . . . . . . 14
Emergency On/Off Switch. . . . . . . . . . . . . . . . . . . . . . . . . . 14
Board Addresses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Control Module Communication . . . . . . . . . . . . . . . . . . . 14
Carrier Comfort Network® Interface . . . . . . . . . . . . . . . . 14
Sensors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
• COOLER LEAVING FLUID SENSOR
• COOLER ENTERING FLUID SENSOR
• CONDENSER LEAVING FLUID SENSOR
• CONDENSER ENTERING FLUID SENSOR
• COMPRESSOR RETURN GAS
TEMPERATURE SENSOR
• OUTDOOR-AIR TEMPERATURE SENSOR
• DUAL LEAVING WATER TEMPERATURE SENSOR
• REMOTE SPACE TEMPERATURE SENSOR
Energy Management Module . . . . . . . . . . . . . . . . . . . . . . . 21
Loss-of-Cooler Flow Protection . . . . . . . . . . . . . . . . . . . . 21
Condenser Flow Protection . . . . . . . . . . . . . . . . . . . . . . . . 21
Thermostatic Expansion Valves (TXV) . . . . . . . . . . . . . 21
Capacity Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
• MINUTES LEFT FOR START
• MINUTES OFF TIME
• LEAD/LAG DETERMINATION
• CAPACITY CONTROL OVERRIDES
Operation of Machine Based on Control Method
and Cooling Set Point Selection Settings . . . . . . . . 24
Cooling Set Point Select . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Cooler Pump Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Ice Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Service Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Cooler Pump Sequence of Operation . . . . . . . . . . . . . . 25

38
38
38
39
43

Replacing Defective Modules. . . . . . . . . . . . . . . . . . . . 43
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44,45
Recommended Maintenance Schedule . . . . . . . . . . . . 44
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . .44-52
Complete Unit Stoppage and Restart . . . . . . . . . . . . . . 44
• GENERAL POWER FAILURE
• UNIT ENABLE-OFF-REMOTE CONTACT SWITCH IS
OFF
• CHILLED FLUID PROOF-OF-FLOW SWITCH OPEN
• OPEN 24-V CONTROL CIRCUIT BREAKERS
• COOLING LOAD SATISFIED
• THERMISTOR FAILURE
• LOW SATURATED SUCTION
• COMPRESSOR SAFETIES
Alarms and Alerts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
APPENDIX A — LOCAL DISPLAY TABLES . . . . . . .53-64
APPENDIX B — CCN TABLES. . . . . . . . . . . . . . . . . . . .65-72
START-UP CHECKLIST FOR 30MP LIQUID
CHILLER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . CL-1 to CL-8

GENERAL
This publication contains Start-Up, Service, Controls, Operation, and Troubleshooting information for the 30MPW watercooled chillers and the 30MPA air-cooled chillers. See Table 1.
These liquid chillers are equipped with ComfortLink controls
and conventional thermostatic expansion valves (TXVs). The
30MPA units and the 30MPW units with optional medium
temperature brine are also equipped with liquid line solenoid
valves (LLSVs).

CAUTION
This unit uses a microprocessor-based electronic control
system. Do not use jumpers or other tools to short out or
bypass components or otherwise depart from recommended procedures. Any short-to-ground of the control
board or accompanying wiring may destroy the board or
electrical component.

Condenser Pump/Condenser Fan Output
Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Configuring and Operating Dual Chiller Control. . . . 25
Temperature Reset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Demand Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
• DEMAND LIMIT (2-Stage Switch Controlled)
• EXTERNALLY POWERED DEMAND LIMIT
(4 to 20 mA Controlled)
• DEMAND LIMIT (CCN Loadshed Controlled)
Cooling Set Point (4 to 20 mA) . . . . . . . . . . . . . . . . . . . . . 32
PRE-START-UP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33,34
System Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
START-UP AND OPERATION . . . . . . . . . . . . . . . . . . . . 34-36
Actual Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Check Refrigerant Charge. . . . . . . . . . . . . . . . . . . . . . . . . . 34
Operating Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
• TEMPERATURES
• VOLTAGE — ALL UNITS
OPERATION SEQUENCE . . . . . . . . . . . . . . . . . . . . . . . . 36
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36-44
Electronic Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
• CONTROL COMPONENTS
Compressor Replacement . . . . . . . . . . . . . . . . . . . . . . . . . 36
30MPW Condenser and 30MP Cooler . . . . . . . . . . . . . . 36
• BRAZED-PLATE COOLER AND CONDENSER
HEAT EXCHANGER REPLACEMENT
• BRAZED-PLATE COOLER AND CONDENSER
HEAT EXCHANGER CLEANING
Oil Charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Check Refrigerant Feed Components . . . . . . . . . . . . . . 37
• FILTER DRIER
• MOISTURE-LIQUID INDICATOR
• THERMOSTATIC EXPANSION VALVE (TXV)

Table 1 — Unit Sizes
UNIT MODEL
30MPA,MPW015
30MPA,MPW020
30MPA,MPW030
30MPA,MPW040
30MPA,MPW045

NOMINAL TONS
15
20
30
40
45

Conventions Used in This Manual — The following conventions for discussing configuration points for the
local display (scrolling marquee or Navigator™ accessory)
will be used in this manual.
Point names will be written with the mode name first, then
any sub-modes, then the point name, each separated by an
arrow symbol (. Names will also be shown in bold
and italics. As an example, the Minimum Load Valve Select
Point, which is located in the Configuration mode, Option 1
sub-mode, would be written as ConfigurationOPT1
MLV.S.
This path name will show the user how to navigate through
the local display to reach the desired configuration. The user
would scroll through the modes and sub-modes using the
and
keys. The arrow symbol in the path name
represents pressing ENTER to move into the next level of the
menu structure.
2

Changing item values or testing outputs is accomplished in
the same manner. Locate and display the desired item. Press
ENTER so that the item value flashes. Use the arrow keys to
change the value or state and press the ENTER key to accept
it. Press the ESCAPE key to return to the next higher level of
structure. Repeat the process as required for other items.

When a value is included as part of the path name, it will be
shown at the end of the path name after an equals sign. If the
value represents a configuration setting, an explanation will
be shown in parenthesis after the value. As an example,
ConfigurationOPT1MLV.S = 1 (Minimum Load Valve
Select).
Pressing the ESCAPE and ENTER keys simultaneously
will scroll an expanded text description of the point name or
value across the display. The expanded description is shown in
the local display tables but will not be shown with the path
names in text.

Items in the Configuration and Service Test modes are password protected. The words ‘PASS’ and ‘WORD’ will alternate
on the display when required. The default password is 0111.
Press ENTER and the 1111 password will be displayed. Press
ENTER again and the first digit will begin to flash. Use the
arrow keys to change the number and press ENTER to accept
the digit. Continue with the remaining digits of the password.
The password can only be changed through CCN operator interface software such as ComfortWORKS®, ComfortVIEW™
and Service Tool.

The CCN (Carrier Comfort Network®) point names are also
referenced in the local display tables for users configuring the
unit with CCN software instead of the local display. The CCN
tables are located in Appendix B of the manual.

Basic Control Usage
SCROLLING MARQUEE DISPLAY — The scrolling marquee display is the standard interface display to the ComfortLink
Control System for 30MP units. The display has up and down
arrow keys, an ENTER key, and an ESCAPE key. These
keys are used to navigate through the different levels of the
display structure. Press the ESCAPE key until the highest
operating level is displayed to move through the top 11 mode
levels indicated by LEDs (light emitting diodes) on the left side
of the display. See Fig. 1 and Tables 2-14.

See Tables 2-14 and Appendix A for further details.
ACCESSORY NAVIGATOR™ DISPLAY MODULE —
The Navigator module provides a mobile user interface to the
ComfortLink™ control system, which is only available as a
field-installed accessory. The display has up and down arrow
keys, an ENTER key, and an ESCAPE key. These keys are
used to navigate through the different levels of the display
structure. Press the ESCAPE key until ‘Select a Menu Item’
is displayed to move through the top 11 mode levels indicated
by LEDs on the left side of the display. See Fig. 2.

Once within a mode or sub-mode, pressing the ENTER
and ESCAPE keys simultaneously will put the scrolling
marquee display into expanded text mode where the full meaning of all sub-modes, items and their values can be displayed
for the current selection. Press the ENTER and ESCAPE
keys to return the scrolling marquee display to its default menu
of rotating display items (those items in Run StatusVIEW).
In addition, the password will be disabled, requiring that it be
entered again before changes can be made to password protected items. Press the ESCAPE key to exit out of the expanded
text mode.

Once within a Mode or sub-mode, a “>” indicates the currently selected item on the display screen. Pressing the
ENTER and ESCAPE keys simultaneously will put the Navigator module into expanded text mode where the full meaning
of all sub-modes, items and their values can be displayed. Pressing the ENTER and ESCAPE keys when the display says
‘Select Menu Item’ (Mode LED level) will return the Navigator
module to its default menu of rotating display items (those items
in Run StatusVIEW). In addition, the password will be disabled, requiring that it be entered again before changes can be
made to password protected items. Press the ESCAPE key to
exit out of the expanded text mode.

NOTE: When the Language Selection (Configuration
DISPLANG), variable is changed, all appropriate display
expansions will immediately change to the new language. No
power-off or control reset is required when reconfiguring
languages.
When a specific item is located, the item name alternates
with the value. Press the ENTER key at a changeable item
and the value will be displayed. Press ENTER again and the
value will begin to flash indicating that the value can be
changed. Use the up and down arrow keys to change the value,
and confirm the value by pressing the ENTER key.

NOTE: When the Language Selection (Configuration
DISPLANG), variable is changed, all appropriate display
expansions will immediately change to the new language. No
power-off or control reset is required when reconfiguring
languages.
When a specific item is located, the item name appears on the
left of the display, the value will appear near the middle of the
display and the units (if any) will appear on the far right of the
display. Press the ENTER key at a changeable item and the value will begin to flash. Use the up and down arrow keys to change
the value, and confirm the value by pressing the ENTER key.

MODE

Run Status
Service Test
Temperature
Pressures
Setpoints
Inputs

Alarm Status

Outputs
Configuration
Time Clock

ESCAPE

ENTER

Operating Modes
Alarms

Items in the Configuration and Service Test modes are password protected. The words Enter Password will be displayed
when required, with 1111 also being displayed. The default
password is 1111. Use the arrow keys to change the number

Fig. 1 — Scrolling Marquee Display

Configuration mode. Press ENTER to obtain access to this
mode. The display will read:
> TEST OFF
METR OFF
LANG ENGLISH
Pressing ENTER will cause the “OFF” to flash. Use the up
or down arrow keys to change “OFF” to “ON”. Pressing
ENTER will illuminate all LEDs and display all pixels in the
view screen. Pressing the up and down arrow keys simultaneously allows the user to adjust the display brightness. Use the
up or down arrow keys to adjust screen brightness. Press
ENTER to accept the change. The Navigator module will
keep this setting as long as it is plugged in to the LEN bus.

and press ENTER to enter the digit. Continue with the remaining digits of the password. The password can only be
changed through CCN operator interface software such as
ComfortWORKS, ComfortVIEW and Service Tool.
Adjusting the Contrast — The contrast of the display can be
adjusted to suit ambient conditions. To adjust the contrast of
the Navigator module, press the ESCAPE key until the display reads, “Select a menu item.” Using the arrow keys move
to the Configuration mode. Press ENTER to obtain access to
this mode. The display will read:
> TEST OFF
METR OFF
LANG ENGLISH
Pressing ENTER will cause the “OFF” to flash. Use the up
or down arrow to change “OFF” to “ON”. Pressing ENTER
will illuminate all LEDs and display all pixels in the view
screen. Pressing ENTER and ESCAPE simultaneously
allows the user to adjust the display contrast. Use the up or
down arrows to adjust the contrast. The screen’s contrast will
change with the adjustment. Press ENTER to accept the
change. The Navigator module will keep this setting as long as
it is plugged in to the LEN bus.

Com

fortL

MOD

E
Alarm

Run
Status
Servic
e Tes
t
Tem
peratu
res
Pressu
res
Setpo

ink

Status

ints

Inputs
Outpu

Config
uration
Time
Clock
Opera
ting
Modes
Alarm
s

ENTE

Adjusting the Backlight Brightness — The backlight of the
display can be adjusted to suit ambient conditions. The factory
default is set to the highest level. To adjust the backlight of the
Navigator module, press the ESCAPE key until the display
reads, “Select a menu item.” Using the arrow keys move to the

ESC

Fig. 2 — Accessory Navigator™ Display Module

Table 2 — Scrolling Marquee Display Menu Structure*
MODE

SUB-MODE

RUN
SERVICE
STATUS
TEST
Auto
Service
View of
Test Mode
Run Status
(TEST)
(VIEW)
Unit Run
Outputs
Hour and
and Pumps
Start
(OUTS)
(RUN)
Circuit and Ciruit A Comp
Compressor
Test
Run Hours
(CMPA)
(HOUR)

SET
TEMPERATURES PRESSURES POINTS
Unit Temperatures
(UNIT)
Temperatures
Circuit A
(CIR.A)

Pressures
Circuit A
(PRC.A)

Cooling
Setpoints
(COOL)
Head
Pressure
Setpoint
(HEAD)
Brine
Freeze
Setpoint
(FRZ)

INPUTS

OUTPUTS

CONFIGURATION

TIME
CLOCK

OPERATING
MODES

ALARMS

General
Inputs
(GEN.I)

General
Outputs
(GEN.O)

Display
Configuration
(DISP)

Time of
Day
(TIME)

Modes
(MODE)

Current
(CRNT)

Circuit
Inputs
(CRCT)

Outputs
Circuit A
(CIR.A)

Unit
Configuration
(UNIT)

4-20mA
Inputs
(4-20)

Unit Options 1
Hardware
(OPT1)

Compressor
Starts
(STRT)

Unit Options 2
Controls
(OPT2)

Preventive
Maintenance
(PM)

CCN Network
Configuration
(CCN)

Software
Version
(VERS)

Reset Cool Temp
(RSET)
Set Point and
Ramp Load
(SLCT)
Service
Configuration
(SERV)
Broadcast
Configuration
(BCST)

Month,
Date, Day,
and Year
(DATE)
Daylight
Savings
Time
(DST)
Local
Holiday
Schedules
(HOL.L)
Schedule
Number
(SCH.N)
Local
Occupancy
Schedule
(SCH.L)
Schedule
Override
(OVR)

For example, using the language selection item:
Language Selection (ConfigurationDISPLANG)

LEGEND
Ckt — Circuit
*Throughout this text, the location of items in the menu structure will be
described in the following format:
Item Expansion (Mode NameSub-mode NameITEM)

Reset
Alarms
(RCRN)
Alarm
History
(HIST)

Table 3 — Run Status Mode and Sub-Mode Directory
SUB-MODE

KEYPAD
ENTRY

ITEM

DISPLAY

VIEW

ENTER

EWT

XXX.X F

ENTERING FLUID TEMP

LWT

XXX.X F

LEAVING FLUID TEMP

SETP

XXX.X F

ACTIVE SETPOINT

CTPT

XXX.X F

CONTROL POINT

LOD.F

XXX

LOAD/UNLOAD FACTOR

STAT

CONTROL MODE

OCC

YES/NO

OCCUPIED

MODE

YES/NO

OVERRIDE MODES IN EFFECT

CAP

XXX %

PERCENT TOTAL CAPACITY

STGE

REQUESTED STAGE

ALRM

XXX

CURRENT ALARMS & ALERTS

TIME

XX.XX

TIME OF DAY

00.00-23.59

MNTH

MONTH OF YEAR

1 = January, 2 = February, etc.

DATE

DAY OF MONTH

01-31

YEAR

YEAR OF CENTURY

RUN

HOUR

STRT

ENTER

SUB-ITEM

DISPLAY

SUB-ITEM DISPLAY

HRS.U XXXX HRS

COMMENT

0 = Service Test
1 = Off Local
2 = Off CCN
3 = Off Time
4 = Off Emrgcy
5 = On Local
6 = On CCN
7 = On Time
8 = Ht Enabled
9 = Pump Delay

MACHINE OPERATING HOURS

STR.U

XXXX

MACHINE STARTS

HR.P1

XXXX.X

PUMP 1 RUN HOURS

HR.P2

XXXX.X

PUMP 2 RUN HOURS

HR.A1 XXXX HRS

COMPRESSOR A1 RUN HOURS

HR.A2 XXXX HRS

COMPRESSOR A2 RUN HOURS

HR.A3 XXXX HRS

COMPRESSOR A3 RUN HOURS

ST.A1

XXXX

COMPRESSOR A1 STARTS

ST.A2

XXXX

COMPRESSOR A2 STARTS

ST.A3

XXXX

COMPRESSOR A3 STARTS

STRN

STRAINER MAINTENANCE
SI.ST

XXXX HRS

STRAINER SRVC INTERVAL

S.T.DN

XXXX HRS

STRAINER SRVC COUNTDOWN

S.T.MN

YES/NO

STRAINER MAINT. DONE

ST.DT
ENTER

ITEM
EXPANSION

STRAINER MAINT. DATES
S.T.M0

MM/DD/YY HH:MM

S.T.M1

MM/DD/YY HH:MM

S.T.M2

MM/DD/YY HH:MM

S.T.M3

MM/DD/YY HH:MM

S.T.M4

MM/DD/YY HH:MM

User Entry

Table 3 — Run Status Mode and Sub-Mode Directory (cont)
SUB-MODE

KEYPAD
ENTRY

ITEM

VERS

ENTER

*Press

ENTER

and

ITEM
EXPANSION

COMMENT

AUX

CESR131333-xx-xx

xx-xx is Version number*

MBB

CESR131279-xx-xx

xx-xx is Version number*

EMM

CESR131174-xx-xx

xx-xx is Version number*

MARQ

CESR131171-xx-xx

xx-xx is Version number*

NAVI

CESR130227-xx-xx

xx-xx is Version number*

ESCAPE

DISPLAY

SUB-ITEM

DISPLAY

SUB-ITEM DISPLAY

simultaneously to obtain version number.

Table 4 — Service Test Mode and Sub-Mode Directory
SUB-MODE
TEST

KEYPAD
ENTRY

ITEM

ITEM
EXPANSION
SERVICE TEST MODE

DISPLAY
ON/OFF

ENTER

OUTS

COMMENT
To Enable Service Test Mode,
move Enable/Off/Remote
Contact switch to OFF. Change
TEST to ON. Move switch to
ENABLE.

OUTPUTS AND PUMPS
CLR.P

ON/OFF

COOLER PUMP RELAY

CND.P

ON/OFF

CONDENSER PUMP

UL.TM

0 to 15

COMP A1 UNLOAD TIME

CC.H

ON/OFF

CRANKCASE HEATER

CW.VO

ON/OFF

CONDENSER VALVE OPEN

CW.VC

ON/OFF

CONDENSER VALVE CLOSE

LL.SV

ON/OFF

LIQUID LINE SOLENOID

RMT.A

ON/OFF

REMOTE ALARM RELAY

CC.A1

ON/OFF

COMPRESSOR A1 RELAY

UL.TM

0 to 15

COMP A1 UNLOAD TIME

CC.A2

ON/OFF

COMPRESSOR A2 RELAY

CC.A3

ON/OFF

COMPRESSOR A3 RELAY

MLV

ON/OFF

MINIMUM LOAD VALVE RELAY

CMPA

CIRCUIT A COMPRESSOR TEST
ENTER

Table 5 — Temperature Mode and Sub-Mode Directory
SUB-MODE

KEYPAD
ENTRY

ITEM

DISPLAY

ITEM
EXPANSION
ENT AND LEAVE UNIT TEMPS

ENTER

CEWT

XXX.X F

COOLER ENTERING FLUID

CLWT

XXX.X F

COOLER LEAVING FLUID

CDET

XXX.X F

CONDENSER ENTERING FLUID

CDLT

XXX.X F

CONDENSER LEAVING FLUID

OAT

XXX.X F

OUTSIDE AIR TEMPERATURE

SPT

XXX.X F

SPACE TEMPERATURE

DLWT

XXX.X F

LEAD/LAG LEAVING FLUID

UNIT

COMMENT

Table 5 — Temperature Mode and Sub-Mode Directory (cont)
SUB-MODE

KEYPAD
ENTRY

ITEM

DISPLAY

ITEM
EXPANSION
TEMPERATURES CIRCUIT A

ENTER

SCT.A

XXX.X F

SATURATED CONDENSING TMP

SST.A

XXX.X F

SATURATED SUCTION TEMP

RGT.A

XXX.X F

COMPR RETURN GAS TEMP

D.GAS

XXX.X F

DISCHARGE GAS TEMP

SH.A

XXX.X ^F

SUCTION SUPERHEAT TEMP

CIR.A

COMMENT

Table 6 — Pressure Mode and Sub-Mode Directory
SUB-MODE

KEYPAD
ENTRY

ITEM

DISPLAY

ITEM
EXPANSION
PRESSURES CIRCUIT A

ENTER

DP.A

XXX.X PSIG

DISCHARGE PRESSURE

SP.A

XXX.X PSIG

SUCTION PRESSURE

PRC.A

COMMENT

Table 7 — Set Points Mode and Sub-Mode Directory
SUB-MODE

KEYPAD
ENTRY

ITEM

DISPLAY

ITEM
EXPANSION
COOLING SETPOINTS

ENTER

CSP.1

XXX.X F

COOLING SETPOINT 1

Default: 44 F

CSP.2

XXX.X F

COOLING SETPOINT 2

Default: 44 F

CSP.3

XXX.X F

ICE SETPOINT

Default: 32 F

ENTER

H.DP

XXX.X F

ENTER

BR.FZ

XXX.X F

COOL

HEAD

COMMENT

HEAD PRESSURE SETPOINTS
HEAD SETPOINT

FRZ

Default: 95 F

BRINE FREEZE SETPOINT
BRINE FREEZE POINT

Default: 34 F

Table 8 — Inputs Mode and Sub-Mode Directory
SUB-MODE

KEYPAD
ENTRY

ITEM

DISPLAY

ITEM
EXPANSION
GENERAL INPUTS

ENTER

STST

STRT/STOP

START/STOP SWITCH

FLOW

ON/OFF

COOLER FLOW SWITCH

CD.FL

OPEN/CLSE

CONDENSER FLOW SWITCH

DLS1

ON/OFF

DEMAND LIMIT SWITCH 1

DLS2

ON/OFF

DEMAND LIMIT SWITCH 2

ICED

ON/OFF

ICE DONE

DUAL

ON/OFF

DUAL SETPOINT SWITCH

FKA1

ON/OFF

COMPRESSOR A1 FEEDBACK

FKA2

ON/OFF

COMPRESSOR A2 FEEDBACK

FKA3

ON/OFF

COMPRESSOR A3 FEEDBACK

DMND

XX.X MA

4-20 MA DEMAND SIGNAL

RSET

XX.X MA

4-20 MA RESET SIGNAL

CSP

XX.X MA

4-20 MA COOLING SETPOINT

GEN.I

CRCT

CIRCUITS INPUTS
ENTER

4-20 MA INPUTS

4-20
ENTER

COMMENT

Table 9 — Outputs Mode and Sub-Mode Directory
SUB-MODE

KEYPAD
ENTRY

ITEM

DISPLAY

ITEM
EXPANSION
GENERAL OUTPUTS

ENTER

C.LWP

ON/OFF

COOLER PUMP RELAY

C.DWP

ON/OFF

CONDENSER PUMP

ALRM

ON/OFF

ALARM RELAY

CDWO

ON/OFF

CONDENSER VALVE OPEN

CDWC

ON/OFF

GEN.O

COMMENT

CONDENSER VALVE CLOSE

CIR.A

OUTPUTS CIRCUIT A
ENTER

CC.A1

ON/OFF

COMPRESSOR A1 RELAY

D.SOL

ON/OFF

DIGITAL SCROLL SOLENOID

CC.A2

ON/OFF

COMPRESSOR A2 RELAY

CC.A3

ON/OFF

COMPRESSOR A3 RELAY

CCH

ON/OFF

CRANKCASE HEATER RELAY

LLSV

ON/OFF

LIQUID LINE SOLENOID

MLV.R

ON/OFF

MINIMUM LOAD VALVE RELAY

Table 10 — Configuration Mode and Sub-Mode Directory
SUB-MODE

KEYPAD
ENTRY

ITEM

DISPLAY

ENTER

TEST

ON/OFF

TEST DISPLAY LEDS

METR

ON/OFF

METRIC DISPLAY

LANG

LANGUAGE SELECTION

Default: 0
0 = English
1 = Espanol
2 = Francais
3 = Portuguese

PAS.E

ENBL/DSBL

PASSWORD ENABLE

Default: Enable

PASS

xxxx

SERVICE PASSWORD

Default: 1111

DISP

UNIT

ITEM
EXPANSION
DISPLAY CONFIGURATION

COMMENT

Off = English
On = Metric

UNIT CONFIGURATION

ENTER

2=WaterCooled
3=Split System

TYPE

UNIT TYPE

SIZE

UNIT SIZE

SZA.1

COMPRESSOR A1 SIZE

Unit Dependent

SZA.2

COMPRESSOR A2 SIZE

Unit Dependent

SZA.3

COMPRESSOR A3 SIZE

Unit Dependent

A1.TY

No/Yes

COMPRESSOR A1 DIGITAL?

Default: Yes (A1 Digital Scroll)

MAX.T

0 to 15

MAXIMUM A1 UNLOAD TIME

Default: 7

Table 10 — Configuration Mode and Sub-Mode Directory (cont)
SUB-MODE

KEYPAD
ENTRY

ITEM

DISPLAY

ENTER

FLUD

COOLER FLUID

MLV.S

YES/NO

MINIMUM LOAD VALVE SELECT

R.G.EN

ENBL/DSBL

RETURN GAS SENSOR ENABLE

OAT.E

ENBL/DSBL

ENABLE OAT SENSOR

D.G.EN

ENBL/DSBL

DISCHARGE GAS TEMP ENABLE

CSB.E

ENBL/DSBL

CSB BOARDS ENABLE

CPC

ON/OFF

COOLER PUMP CONTROL

PM.DY

XX MIN

COOLER PUMP SHUTDOWN DLY

DPME

ENABLE CONDENSER PUMP

DFLS

ENBL/DSBL

ENABLE COND FLOW SWITCH

CDWS

ENBL/DSBL

ENABLE COND WTR SENSORS

CTRL

UNIT OPTIONS 2 CONTROLS
CONTROL METHOD

LCWT

XX.X F

HIGH LCW ALERT LIMIT

DELY

MINUTES OFF TIME

Default: 0 Minutes
Range: 0 to 15 Minutes

ICE.M

ENBL/DSBL

ICE MODE ENABLE

Default: Disable

CCNA

XXX

CCN ADDRESS

Default: 1
Range: 1 to 239

CCNB

XXX

CCN BUS NUMBER

Default: 0
Range: 0 to 239

BAUD

CCN BAUD RATE

CRST

RESET COOL TEMP
COOLING RESET TYPE

MA.DG

XX.X F

4-20 - DEGREES RESET

RM.NO

XXX.X F

REMOTE - NO RESET TEMP

Default: 125F (51.7C)
Range: 0° to 125F

RM.F

XXX.X F

REMOTE - FULL RESET TEMP

Default: 0.0F (-17.8C)
Range: 0 to 125F

RM.DG

XX.X F

REMOTE - DEGREES RESET

Default: 0.0F
Range: –30 to 30F

RT.NO

XXX.X F

RETURN - NO RESET TEMP

Default: 10.0F (5.6C)
Range: 0 to 125F COOLER T

RT.F

XXX.X F

RETURN - FULL RESET TEMP

Default: 0.0F (0.0C)
Range: 0 to 125F COOLER T

RT.DG

XX.X F

RETURN - DEGREES RESET

DMDC

DEMAND LIMIT SELECT

DM20

XXX %

DEMAND LIMIT AT 20 MA

SHNM

XXX

LOADSHED GROUP NUMBER

SHDL

XXX %

LOADSHED DEMAND DELTA

Default: 0%
Range: 0 to 60%

SHTM

XXX

MAXIMUM LOADSHED TIME

Default: 60 minutes
Range: 0 to 120 minutes

DLS1

XXX %

DEMAND LIMIT SWITCH 1

Default: 80%
Range: 0 to 100%

DLS2

XXX %

DEMAND LIMIT SWITCH 2

Default: 50%
Range: 0 to 100%

OPT1

OPT2
ENTER

CCN

ITEM
EXPANSION
UNIT OPTIONS 1 HARDWARE

COMMENT

Default: Water
1 = Water
2 = Medium Temperature Brine
Default: No

Default: On
0 to 10 minutes, Default: 1 min.
0 to 2

Default: Switch
0 = Enable/Off/Remote Switch
2 = Occupancy
3 = CCN Control
Default: 60
Range: 2 to 60 F

CCN NETWORK CONFIGURATION
ENTER

RSET
ENTER

Default: 9600
1 = 2400
2 = 4800
3 = 9600
4 = 19,200
5 = 38,400
Default: No Reset
0 = No Reset
1 = 4 to 20 mA Input
2 = Outdoor Air Temperature
3 = Return Fluid
4 = Space Temperature
Default: 0.0F
Range: –30 to 30F

Default: 0.0F
Range: –30 to 30F (–34.4 to -1.1 C)
Default: None
0 = None
1 = Switch
2 = 4 to 20 mA Input
3 = CCN Loadshed
Default: 100%
Range: 0 to 100%
Default: 0
Range: 0 to 99

Table 10 — Configuration Mode and Sub-Mode Directory (cont)
SUB-MODE

RSET
(cont)

KEYPAD
ENTRY

ITEM

DISPLAY

ITEM
EXPANSION

LLEN

ENBL/DSBL

LEAD/LAG CHILLER ENABLE

MSSL

SLVE/MAST

MASTER/SLAVE SELECT

Default: Master
Default: 0
Range: 0 to 239

Default: Disable

SLVA

XXX

SLAVE ADDRESS

LLBL

LEAD/LAG BALANCE SELECT

LLBD

XXX

LEAD/LAG BALANCE DELTA

LLDY

XXX

LAG START DELAY

PARA

YES

PARALLEL CONFIGURATION

CLSP

SETPOINT AND RAMP LOAD
COOLING SETPOINT SELECT

RL.S

ENBL/DSBL

RAMP LOAD SELECT

CRMP

X.X

COOLING RAMP LOADING

SCHD

SCHEDULE NUMBER

Z.GN

X.X

DEADBAND MULTIPLIER

EN.A1

ENBL/DSBL

ENABLE COMPRESSOR A1

Unit dependent

EN.A2

ENBL/DSBL

ENABLE COMPRESSOR A2

Unit dependent

EN.A3

ENBL/DSBL

ENABLE COMPRESSOR A3

Unit dependent

REV.R

ENBL/DSBL

REVERSE ROTATION ENABLE

Default: Enable

ENTER

SLCT
ENTER

COMMENT

SERV

Default: Master Leads
0 = Master Leads
1 = Slave Leads
2 = Automatic
Default: 168 hours
Range: 40 to 400 hours
Default: 5 minutes
Range: 0 to 30 minutes
Default: YES (CANNOT BE CHANGED)

Default: Single
0 = Single
1 = Dual Switch
2 = Dual CCN Occupied
3 = 4 to 20 mA Input (requires
EMM)
Default: Enable
Default: 1.0
Range: 0.2 to 2.0
Default: 1
Range: 1 to 99
Default: 1.0
Range: 1.0 to 4.0

SERVICE CONFIGURATION
ENTER

BCST

BROADCAST CONFIGURATION
ENTER

T.D.BC

ON/OFF

CCN TIME/DATE BROADCAST

OAT.B

ON/OFF

CCN OAT BROADCAST

G.S.BC

ON/OFF

GLOBAL SCHEDULE BROADCAST

BC.AK

ON/OFF

CCN BROADCAST ACK’ER

Table 11 — Time Clock Mode and Sub-Mode Directory
SUB-MODE

KEYPAD
ENTRY

ITEM

DISPLAY

ENTER

HH.MM

XX.XX

SUB-ITEM

ITEM
EXPANSION
TIME OF DAY

DISPLAY

TIME

HOUR AND MINUTE

DATE

COMMENT

Military (00:00 – 23:59)

MONTH,DATE,DAY AND YEAR
ENTER

MNTH

MONTH OF YEAR

1-12 (1 = January, 2 = February, etc)

DOM

DAY OF MONTH

Range: 01-31

DAY

DAY OF WEEK

1-7 (1 = Monday, 2 = Tuesday, etc)

YEAR

XXXX

YEAR OF CENTURY

STR.M

MONTH

Default: 4, Range 1 – 12

STR.W

WEEK

Default: 1, Range 1 – 5

STR.D

DAY

Default: 7, Range 1 – 7

MIN.A

MINUTES TO ADD

Default: 60, Range 0 – 99

STP.M

MONTH

Default: 10, Range 1 – 12

STP.W

WEEK

Default: 5, Range 1 – 5

STP.D

DAY

Default: 7, Range 1 – 7

MIN.S

DST

DAYLIGHT SAVINGS TIME
ENTER

HOL.L
ENTER

MINUTES TO SUBTRACT

Default: 60, Range 0 – 99

LOCAL HOLIDAY SCHEDULES

HD.01 through HD.30

MON

HOLIDAY START MONTH

Range 0 – 12

DAY

START DAY

Range 0 – 31

LEN

DURATION (DAYS)

Range 0 - 99

SCHEDULE NUMBER

Default: 1, Range 1 – 99

SCH.N

SCH.L

LOCAL OCCUPANCY SCHEDULE
ENTER

PER.1

OCCUPANCY PERIOD 1*

ENTER

OCC.1

XX:XX

PERIOD OCCUPIED TIME

Military (00:00 – 23:59)

UNC.1

XX.XX

PERIOD UNOCCUPIED TIME

Military (00:00 – 23:59)

MON.1

YES/NO

MONDAY IN PERIOD

TUE.1

YES/NO

TUESDAY IN PERIOD

WED.1

YES/NO

WEDNESDAY IN PERIOD

THU.1

YES/NO

THURSDAY IN PERIOD

FRI.1

YES/NO

FRIDAY IN PERIOD

SAT.1

YES/NO

SATURDAY IN PERIOD

SUN.1

YES/NO

SUNDAY IN PERIOD

HOL.1

YES/NO

HOLIDAY IN PERIOD

OVR

SCHEDULE OVERRIDE
ENTER

OVR.T

TIMED OVERRIDE HOURS

Default: 0, Range 0-4 hours

OVR.L

OVERRIDE TIME LIMIT

Default: 0, Range 0-4 hours

T.OVR

YES/NO

TIMED OVERRIDE

User Entry

* Repeats for Occupancy Periods 2 through 8.

Table 12 — Operating Mode and Sub-Mode Directory
SUB-MODE

KEYPAD
ENTRY

ITEM

DISPLAY

ITEM
EXPANSION
MODES CONTROLLING UNIT

ENTER

MD01

ON/OFF

CSM CONTROLLING CHILLER

MD03

ON/OFF

MASTER/SLAVE CONTROL

MD05

ON/OFF

RAMP LOAD LIMITED

MD06

ON/OFF

TIMED OVERRIDE IN EFFECT

MD07

ON/OFF

LOW COOLER SUCTION TEMPA

MD09

ON/OFF

SLOW CHANGE OVERRIDE

MD10

ON/OFF

MINIMUM OFF TIME ACTIVE

MD13

ON/OFF

DUAL SETPOINT

MD14

ON/OFF

TEMPERATURE RESET

MD15

ON/OFF

DEMAND LIMITED

MD16

ON/OFF

COOLER FREEZE PROTECTION

MD17

ON/OFF

LOW TEMPERATURE COOLING

MD18

ON/OFF

HIGH TEMPERATURE COOLING

MD19

ON/OFF

MAKING ICE

MD20

ON/OFF

STORING ICE

MD21

ON/OFF

HIGH SCT CIRCUIT A

MD23

ON/OFF

MINIMUM COMP ON TIME

MD24

ON/OFF

PUMP OFF DELAY TIME

MODE

CSM
SCT
WSM

—
—
—

COMMENT

LEGEND
Chillervisor System Manager
Saturated Condensing Temperature
Water System Manager

Table 13 — Alarms Mode and Sub-Mode Directory
SUB-MODE

KEYPAD
ENTRY

ITEM
EXPANSION

ITEM

CRNT

ENTER

AXXX OR TXXX

CURRENTLY ACTIVE ALARMS

RCRN

ENTER

YES/NO

RESET ALL CURRENT ALARMS

HIST

ENTER

AXXX OR TXXX

ALARM HISTORY

COMMENT
Alarms are shown as AXXX.
Alerts are shown as TXXX.

Alarms are shown as AXXX.
Alerts are shown as TXXX.

Table 14 — Operating Modes
MODE
NO.

ITEM EXPANSION

CSM CONTROLLING CHILLER

MASTER/SLAVE CONTROL

Ramp load (pull-down) limiting in effect. In this mode, the rate at which leaving fluid temperature
is dropped is limited to a predetermined value to prevent compressor overloading. See Cooling
Ramp Loading (ConfigurationSLCTCRMP). The pull-down limit can be modified, if
desired, to any rate from 0.2° F to 2° F (0.1° to 1° C)/minute.

TIMED OVERRIDE IN EFFECT

Timed override is in effect. This is a 1 to 4 hour temporary override of the programmed
schedule, forcing unit to Occupied mode. Override can be implemented with unit under
Local (Enable) or CCN (Carrier Comfort Network®) control. Override expires after each use.

LOW COOLER SUCTION TEMPA

Circuit A cooler Freeze Protection mode. At least one compressor must be on, and the Saturated Suction Temperature is not increasing greater than 1.1° F (0.6° C) in 10 seconds. If
the saturated suction temperature is less than the Brine Freeze Point (Set PointsFRZ
BR.FZ) minus 6° F (3.4° C) and less than the leaving fluid temperature minus 14° F
(7.8° C) for 2 minutes, a stage of capacity will be removed from the circuit. Or, If the saturated suction temperature is less than the Brine Freeze Point minus 14° F (7.8° C), for
90 seconds, a stage of capacity will be removed from the circuit. The control will continue to
decrease capacity as long as either condition exists.

SLOW CHANGE OVERRIDE

MINIMUM OFF TIME ACTIVE
DUAL SETPOINT

Chiller is being held off by Minutes Off Time (ConfigurationOPT2DELY).

Dual Set Point mode is in effect. Chiller controls to Cooling Set Point 1 (Set PointsCOOL
CSP.1) during occupied periods and Cooling Set Point 2 (Set PointsCOOLCSP.2)
during unoccupied periods.
Temperature reset is in effect. In this mode, chiller is using temperature reset to adjust leaving fluid set point upward and is currently controlling to the modified set point. The set point
can be modified based on return fluid, outdoor-air-temperature, space temperature, or 4 to
20 mA signal.

DEMAND LIMITED

Demand limit is in effect. This indicates that the capacity of the chiller is being limited by
demand limit control option. Because of this limitation, the chiller may not be able to produce the desired leaving fluid temperature. Demand limit can be controlled by switch inputs
or a 4 to 20 mA signal.

COOLER FREEZE PROTECTION

Cooler fluid temperatures are approaching the Freeze point (see Alarms and Alerts section
for definition). The chiller will be shut down when either fluid temperature falls below the
Freeze point.

LOW TEMPERATURE COOLING

Chiller is in Cooling mode and the rate of change of the leaving fluid is negative and
decreasing faster than -0.5° F per minute. Error between leaving fluid and control point
exceeds fixed amount. Control will automatically unload the chiller if necessary.

HIGH TEMPERATURE COOLING

Chiller is in Cooling mode and the rate of change of the leaving fluid is positive and increasing.
Error between leaving fluid and control point exceeds fixed amount. Control will automatically
load the chiller if necessary to better match the increasing load.

18
MAKING ICE
STORING ICE

Chiller is in an unoccupied mode and is using Cooling Set Point 3 (Set PointsCOOL
CSP.3) to make ice. The ice done input to the Energy Management Module (EMM) is open.
Chiller is in an unoccupied mode and is controlling to Cooling Set Point 2 (Set PointsCOOL
CSP.2). The ice done input to the Energy Management Module (EMM) is closed.

HIGH SCT CIRCUIT A

Chiller is in a Cooling mode and the Saturated Condensing Temperature (SCT) is greater than
the calculated maximum limit. No additional stages of capacity will be added. Chiller capacity
may be reduced if SCT continues to rise to avoid high-pressure switch trips by reducing condensing temperature.

MINIMUM COMP ON TIME

Cooling load may be satisfied, however control continues to operate compressor to ensure
proper oil return. May be an indication of oversized application, low fluid flow rate or low loop
volume.

PUMP OFF DELAY TIME

Cooling load is satisfied, however cooler pump continues to run for the number of minutes set
by the configuration variable Cooler Pump Shutdown Delay (ConfigurationOPT1
PM.DY).

Slow change override is in effect. The leaving fluid temperature is close to and moving
towards the control point.

TEMPERATURE RESET
14

Chillervisor System Manager (CSM) is controlling the chiller.
Dual Chiller control is enabled.

RAMP LOAD LIMITED
05

DESCRIPTION

the main base board (MBB) is supplied with the current software. If necessary, reload current software. If the problem still
persists, replace the MBB. A red LED that is lit continuously or
blinking at a rate of once per second or faster indicates that the
board should be replaced.
GREEN LED — The MBB has one green LED. The Local
Equipment Network (LEN) LED should always be blinking
whenever power is on. All other boards have a LEN LED
which should be blinking whenever power is on. Check LEN
connections for potential communication errors at the board J3
and/or J4 connectors. Communication between modules is
accomplished by a 3-wire sensor bus. These 3 wires run in
parallel from module to module. The J4 connector on the MBB
provides both power and communication directly to the
marquee display only.
YELLOW LED — The MBB has one yellow LED. The
Carrier Comfort Network (CCN) LED will blink during times
of network communication.

CONTROLS
General — The 30MP liquid scroll chillers contain the
ComfortLink™ electronic control system that controls and
monitors all operations of the chiller.
The control system is composed of several components as
listed in the sections below. See Fig. 3 for a typical control box
drawing. See Fig. 4 and 5 for control schematics.
Main Base Board (MBB) — See Fig. 6. The MBB is
the heart of the ComfortLink control system. It contains the
major portion of operating software and controls the operation
of the machine. The MBB continuously monitors input/output
channel information received from its inputs and from all other
modules. The MBB receives inputs from the discharge and
suction pressure transducers and thermistors. See Table 15. The
MBB also receives the feedback inputs from each compressor
current sensor board and other status switches. See Table 16.
The MBB also controls several outputs. Relay outputs controlled by the MBB are shown in Table 17. Information is
transmitted between modules via a 3-wire communication bus
or LEN (Local Equipment Network). The CCN (Carrier Comfort Network) bus is also supported. Connections to both LEN
and CCN buses are made at the LVT (low voltage terminal).

Carrier Comfort Network® (CCN) Interface —

The 30MP chiller units can be connected to the CCN if
desired. The communication bus wiring is a shielded,
3-conductor cable with drain wire and is supplied and installed
in the field. See Table 18. The system elements are connected
to the communication bus in a daisy chain arrangement. The
positive pin of each system element communication connector
must be wired to the positive pins of the system elements on
either side of it. This is also required for the negative and
signal ground pins of each system element. Wiring connections
for CCN should be made at LVT. Consult the CCN Contractor’s Manual for further information.
NOTE: Conductors and drain wire must be 20 AWG (American Wire Gage) minimum stranded, tinned copper. Individual
conductors must be insulated with PVC, PVC/nylon, vinyl,
Teflon, or polyethylene. An aluminum/polyester 100% foil
shield and an outer jacket of PVC, PVC/nylon, chrome vinyl,
or Teflon with a minimum operating temperature range of
–20 C to 60 C is required. Wire manufactured by Alpha (2413
or 5463), American (A22503), Belden (8772), or Columbia
(02525) meets the above mentioned requirements.
It is important when connecting to a CCN communication
bus that a color coding scheme be used for the entire network
to simplify the installation. It is recommended that red be used
for the signal positive, black for the signal negative, and white
for the signal ground. Use a similar scheme for cables containing different colored wires.
At each system element, the shields of its communication
bus cables must be tied together. If the communication bus is
entirely within one building, the resulting continuous shield
must be connected to a ground at one point only. If the communication bus cable exits from one building and enters another,
the shields must be connected to grounds at the lightning
suppressor in each building where the cable enters or exits the
building (one point per building only). To connect the unit to
the network:
1. Turn off power to the control box.
2. Cut the CCN wire and strip the ends of the red (+), white
(ground), and black (–) conductors. (Substitute appropriate colors for different colored cables.)
3. Connect the red wire to (+) terminal on LVT of the plug,
the white wire to COM terminal, and the black wire to the
(–) terminal.
4. The RJ14 CCN connector on LVT can also be used, but is
only intended for temporary connection (for example, a
laptop computer running Service Tool).

Energy Management Module (EMM) — The EMM

module is available as a factory-installed option or as a fieldinstalled accessory. The EMM module receives 4 to 20 mA
inputs for the leaving fluid temperature reset, cooling set point
and demand limit functions. The EMM module also receives
the switch inputs for the field-installed 2-stage demand limit
and ice done functions. The EMM module communicates the
status of all inputs with the MBB, and the MBB adjusts the
control point, capacity limit, and other functions according to
the inputs received.

Current Sensor Board (CSB) — The CSB is used to

monitor the status of the compressors by measuring current and
providing an analog input to the main base board (MBB).

Enable/Off/Remote Contact Switch — The Enable/
Off/Remote Contact switch is a 3-position switch used to
control the chiller. When switched to the Enable position the
chiller is under its own control. Move the switch to the Off
position to shut the chiller down. Move the switch to the
Remote Contact position and a field-installed dry contact can
be used to start the chiller. The contacts must be capable of
handling a 24 vac, 50-mA load. In the Enable and Remote
Contact (dry contacts closed) positions, the chiller is allowed to
operate and respond to the scheduling configuration, CCN
configuration and set point data. See Fig. 7.
Emergency On/Off Switch — The Emergency On/Off

switch should only be used when it is required to shut the
chiller off immediately. Power to the MBB, EMM, and
marquee display is interrupted when this switch is off and all
outputs from these modules will be turned off. See Fig. 7.

Board Addresses — The main base board (MBB) has a
3-position instance jumper that must be set to ‘1.’ The EMM
board has 4-position DIP switches. All switches are set to ‘On’
for all boards except the AUX2 board. The AUX2 board DIP
switch settings are shown on the wiring schematic.
Control Module Communication
RED LED — Proper operation of the control boards can be
visually checked by looking at the red status LEDs
(light-emitting diodes). When operating correctly, the red status
LEDs should be blinking in unison at a rate of once every
2 seconds. If the red LEDs are not blinking in unison, verify
that correct power is being supplied to all modules. Be sure that

LEGEND FOR FIG. 3-5
ALMR
AUX
C
CB
CCB
CH
CCH
COMP
CR
CSB
CWFS
CWP
DGS
DPT
DTT
DUS
EMM
EWT
FB
FIOP
FU
GND
HPS
LLSV
LON
LVT
LWT
MBB
MLV
MP
NEC
OAT
PL
RLY
SPT
SW
TB
TRAN
UPC

—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

Alarm Relay
Auxilliary
Contactor, Compressor
Circuit Breaker
Compressor Circuit Breaker
Crankcase Heater
Crankcase Heater Relay
Compressor
Control Relay
Current Sensor Board
Chilled Water Flow Switch
Chilled Water Pump
Digital Scroll Compressor
Discharge Pressure Transducer
Discharge Temperature Thermistor
Digital Unloader Solenoid
Energy Management
Entering Water Temperature
Fuse Block
factory Installed Option
Fuse
Ground
High-Pressure Switch
Liquid Line Solenoid Valve
Local Operating Network
Low Voltage Terminal
Leaving Water Temperature
Main Base Board
Minimum Load Valve
Modular Motor Protection
National Electrical Code
Outdoor-Air Thermistor
Plug
Relay
Suction Pressure Transducer
Switch
Terminal Block
Transformer
Unitary Protocol Converter
Terminal Block
Terminal (Unmarked)
Terminal (Marked)
Splice
Factory Wiring
Field Wiring
Accessory or Option Wiring
To indicate common potential only; not to represent wiring.

EQUIP
GND

TB3

UPC LON
OPTION

UPC

25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1

LVT
DISCONNECT
OPTION CB1A/TB1A
L1

CCB-1

CCB-2

CCB-3

EMM

CSB-A1

CSB-A2

CSB-A3

CCH
CA1

CA2

CA3

TRAN1

MBB
FB1

LOCATED OVER EMM

CB1

CB2

CB3

REMOTE
CONTROL
SW1

OFF

ENABLE

Fig. 3 — Typical Control Box — 30MP015-045 Units

a30-4963

OFF
SW2
ON

TO FUSED
DISCONNECT
PER NEC

RED

SW2

FU3

VIO

380V ONLY

CB3
3.2 AMPS

RED

EQUIP GND

CONNECT FOR
APPROPRIATE
PRIMARY VOLTAGE
SEE TABLE 1

RED

X3
X1

TRAN1
PRIMARY
H3
H2

BRN

3
1

AUX2
J1

1 HOT

GND

24VAC

UPC

UPC FIOP

DGS FIOP

J1
MBB
J2

VIO

BRN

VIO

BRN

VIO

BRN

TB3

GRN/YEL

YEL

FU2

BLK

TB1A

FU1

WHT

RED

BRN

YEL

BLK

STANDARD
TERMINAL
BLOCK

SECONDARY 24V

380V UNITS ONLY

NEUTRAL

CB1A

OPTIONAL
DISCONNECT

TO FUSED DISCONNECT
PER NEC

a30-4965

H1 & H4

H3 & H4

H2 & H4

H1 & H2

H1 & H5

BLU
23

(MPA ONLY)

FU5

FU4

FB1

BLK

CSB-A2

CSB-A1

CA3

UNIT VOLTAGE

YEL

6. FOR 500 SERIES UNIT OPERATION AT 208-3-60V LINE VOLTAGE,
TRAN1 PRIMARY CONNECTIONS MUST BE MOVED TO TERMINALS H3
& H4.

3. ALL FIELD INTERLOCK CONTACTS MUST HAVE A MIN RATING OF
2 AMPS @ 24VAC SEALED. SEE FIELD INTERLOCK WIRING.
4. COMPRESSOR AND FAN MOTORS ARE THERMALLY PROTECTED-THREE PHASE MOTORS PROTECTED AGAINST PRIMARY SINGLE
PHASE CONDITIONS.
5. TERMINALS 14 & 15 OF LVT ARE FOR FIELD CONNECTION
OF REMOTE ON-OFF. THE CONTACT MUST BE RATED FOR DRY
CIRCUIT APPLICATION CAPABLE OF HANDLING A 5VDC
1 MA TO 20 MA LOAD.

WHT

208/230-3-60

CCH

NONE

FNQ-R-3

FNQ-R-10

FNQ-R-1.5

REPLACE
WITH
FNQ-R-3
FNQ-R-2

BLU

YEL

BLK

BLU

YEL

BLK

BLU

YEL

BLK

YEL

BLK

YEL

BLK

YEL

BLK

1
T1

BLK

12. IF CHILLED WATER PUMP INTERLOCK IS USED,
REMOVE JUMPER FROM TERMINAL 16 TO 17 AND
WIRE INTERLOCK CONTACT ACROSS TERMINALS 16 & 17.

11. JUMPER PLUG REQUIRED WHEN MP NOT USED

10. MP-A3 NOT USED IN THE FOLLOWING UNITS:
040,045: 460V UNITS

9. MP-A2 NOT USED IN THE FOLLOWING UNITS:
015,020: ALL UNITS
030-045: 460V UNITS

8. MP-A1 NOT USED IN THE FOLLOWING UNITS:
015,020: ALL UNITS
030-045: 460V UNITS WITHOUT DIGITAL SCROLL

CH-A3

CH-A2

CH-A1

GRN/YEL

COMP A3

(040,045 ONLY)

GRN/YEL

COMP A2

GRN/YEL

COMP A1

(040,045 ONLY)

PL13-2

PL13-1

PL12-2

PL12-1

PL11-2

PL11-1

7. MAX LOAD: 5VA SEALED, 10VA INRUSH

380V
UNITS ONLY

(MPA ONLY)

380-3-60,460-3-60,575-3-60

208/230-3-60

380-3-60,460-3-60,575-3-60

200VA
250VA

575-3-60

TRAN
SIZE
380-3-60
460-3-60

208/230-3-60

BLK

(040,045 ONLY)

BLU

CSB-A3

CA2

CA1

YEL

BLK

BLU

YEL

BLK

BLU BLK

YEL

BLU

YEL

NOT USED ON
380V UNITS

FU4 & FU5

FU3 (24V)

FU1 & FU2

FUSE
NUMBER

(040,045 ONLY)

YEL

WHT

YEL

BLK

CCB-3
11
12

BLK

015,020,040: 208/230V ONLY
030,045: 202/230V,380V ONLY

CCB-2

YEL

BLK

BLU

1. FACTORY WIRING IS IN ACCORDANCE WITH UL 1995 STANDARDS.
ANY FIELD MODIFICATIONS OR ADDITIONS MUST BE IN
COMPLIANCE WITH ALL APPLICABLE CODES.
C MIN WIRE FOR FIELD POWER SUPPLY.

NOTES:

YEL

BLK

YEL

CCB-1
11

BLK

Fig. 4 — Typical Power Wiring Schematic — 30MP015-045 Units

600

460-3-60

500

230-3-60

500

200

208-3-60

100

SERIES

3
2

TERMINAL
CONNECTIONS
FOR PRIMARY SIDE

TABLE 1

J1
EMM
J2

380-3-60

VOLTAGE

FIOP/ACCESSORY

575-3-60

BLU
BLU
BLU

YEL
YEL
YEL

BLK
BLK
BLK

015,020,040: 380V,460V,575V ONLY
030,045: 460V,575V ONLY

TRAN1
A2

CB2
3.2 AMPS

ORN

MBB
J10A

RLY 6

ORN

CWFS-3

BRN

LLSV-A

PNK

CONDENSER
WATER
VALVE
(MPB ONLY)

RED

LLSV-A

(MPA AND BRINE ONLY)
BLU
BLK

BLK

PNK

PL1-1

ORN

14 BLK

VIO

BRN

MLV-A
PL1-4

VIO

ORN

CA1

BRN

PL2-4

GRA

CA2

BRN

PL2-4

VIO

CA3

VIO

(040,045 ONLY)
GRA

BRN

GRA

J11

4
3
RED

CWFS

2
1

4
3

REMOTE
ON-OFF
SWITCH
(SEE
NOTE 5)

PNK

RED

PL2-3

PNK

RED

WHT

VIO

RED
A1

OFF
B1

SW1
ENABLE
RED
C1

BLU

3
4
5

2
3
4

MAIN
BASE
BOARD

1
2
3
4

CNPI

5
BLU

12
CNFS

VIO

6
7
8
9

10
1

1
2
3
4
5
6

1
2
3
4

RED

WHT

BLK

BRN

RED

BRN

MARQUEE
DISPLAY

PNK

RED

MP-A1 T1
SEE NOTE 9

MP-A2 T1
SEE NOTE 10

PL3-3

ORN

DUAL
SETPOINT

SEE NOTE 8

PL1-3

2
15

LLSV-A

BRN

CCH

BRN

TB3

BRN

CA1

BRN

CA1

BRN

CA2

BRN

CA2

BRN

CA3

CWFS

BRN

BLK

PL3-4

BRN

PNK
1

BRN

MLV FIOP

PNK

CCH

BRN

MLV-A

CWPI
(SEE
NOTE
12)

PL3-4

BRN
PL3-2

GRA

BLK

CA3

BRN

PL2-2

MP-A2

MP-A3

SEE NOTE 11

MLV-A

(MPA ONLY)

VIO

PL3-1

VIO

SEE NOTE 11

VIO

PL2-1

GRA

TB3

BRN

PL1-2

MP-A1
VIO

SEE NOTE 11

CCH

BLU

HPS-A

BLK

BRN

GRA

LVT

X2 TRAN1

J11

BRN

CONDENSER FAN/PUMP RELAY
SEE NOTE 7

RLY 3

BLU

RLY 4

J12

7 ORN

BRN

RLY 2

RLY 1

TB3

CWP RELAY
SEE NOTE 7

4 ORN

RLY 8

RLY 7

PNK

ALMR

BRN

ALARM RELAY
SEE NOTE 7

9 ORN

GRN/YEL

LVT

J12

RLY 5

PNK
PNK
GRA

6 ORN

SECONDARY 24V

CB1
3.2 AMPS

RLY 10

FU3

J10B

ORN

3 ORN

RLY 9

RED

2
RLY 11

ORN

SW2
C2

MP-A3 T1

BLU

BRN

PL1-4
BRN

PL2-4
BRN

PL3-4
BRN

RED
WHT
BLK

1
2

AUX2

3
4
5
6
7
8
9
10
11
12

RED

ORN

BRN

RED

ORN

BRN

RED

ORN

BRN

CSB
A2

5
4
BLK

CSB
A3 (040,045 ONLY)

WHT
RED

3
2
1

CSB
A1

DGS
FIOP

CH1

CH11

7
8

1
2

DUS

VIO
BRN

DTT

RED
BLK

ON
OFF

1
2
3

LVT

LEN

J13

(+)

CCN
WHT

(COM)

BLK

(-)

RED

SHIELD

BLK

WHT

RED

BRN

RED

BLK

WHT

RED

BRN
RED
BLK
WHT
RED
BLK
WHT
RED

10
9
8
7
6
5
4
3
2
1

5
10

7
6
5

9
10

3
2
1

12
13
14
15
16

UPC
RED

PORT 2
1 NET +

BLK

2 NET 3 N/C
4 N/C

WHT

5 SIGNAL
PORT 1A
1 NET +

17
LON
OPTION

J3 GND

NET
J4
1
2

2 NET 2
3 SHIELD

UPC OPT

20
21
22
23
24
25
26

1 2 3 4 5 6 7 8

CONDENSER EWT
ACCESSORY

DARK = SWITCH LOCATION

2
CONDENSER LWT
ACCESSORY

3
4
5
6
1

LVT

J12

T55

BLU

VIO

RED

SEN

T-55
ACCSY

BLK

2
OAT ACCESSORY OR
DUAL CHILLER LWT

RGTA
ACCESSORY

LVT

WHT
RED

3
2
1

4
3
2

EMM

2
3
4

5
6

4
1
2
3
4

COOLER ENTERING
FLUID TEMP

RED

BLK

COOLER LEAVING
FLUID TEMP

RED

WHT
RED

3
2
1

4
3
2

7
8
9
10
11

BLK

FIOP/
ACCESSORY

3
4

6
7
8
9
10
11
12

RED
GRN
BLK
RED
GRN
BLK

B
C
A

DPTA

6
7
8
9

B
C

10
11

SPTA

Fig. 5 — Typical Control Wiring Schematic — 30MP015-045 Units
18

1
2
3
4
5
6
7

J10
GRA

GRA

RED

BLU

ICE DONE
DLS STEP 1
DLS STEP 2

9
10
11
12
13
14
10
1
2
3
4
5
6

BRN

6
5

ORN

+ DEMAND
LIMIT
- 4-20mA

+ TEMP
RESET
- 4-20mA

+ COOLING
SETPOINT
- 4-20mA

4
3

7
8

9
VIO

2
PNK

10
11
12

a30-4966

RGTA, CNDE, CNDL, EWT, LWT, and OAT are identical in
temperature versus resistance and voltage drop performance.
The dual chiller thermistor (DLWT) is 5 k at 77 F (25 C)
thermistor. Space temperature thermistor (SPT) is a 10 kat
77 F (25 C). See Thermistors section for temperature-resistance-voltage drop characteristics.
COOLER LEAVING FLUID SENSOR (LWT) — The thermistor is installed in a well in the factory-installed leaving fluid
piping coming from the bottom of the brazed-plate heat
exchanger.
COOLER ENTERING FLUID SENSOR (EWT) — The thermistor is installed in a well in the factory-installed entering fluid
piping coming from the top of the brazed-plate heat exchanger.
CONDENSER LEAVING FLUID SENSOR (CNDL) — The
thermistor is installed in a well in the factory-installed leaving
fluid piping coming from the bottom of the brazed-plate heat
exchanger.
COOLER ENTERING FLUID SENSOR (CNDE) — The thermistor is installed in a well in the factory-installed entering fluid
piping coming from the top of the brazed-plate heat exchanger.
COMPRESSOR RETURN GAS TEMPERATURE SENSOR (RGTA) — This accessory thermistor can be installed in
a well located in the suction line.
OUTDOOR-AIR TEMPERATURE SENSOR (OAT) —
This sensor is an accessory that is remotely mounted and used
for outdoor air temperature reset. See Table 15.
DUAL LEAVING WATER TEMPERATURE SENSOR
(DLWT) — This input can be connected to the LVT. See Table 15. For dual chiller applications (parallel only are supported), connect the dual chiller leaving fluid temperature sensor
(5 kthermistor, Carrier part no. HH79NZ029) to the outside
air temperature input of the Master chiller. If outside air temperature is required for reset applications, connect the sensor to
the Slave chiller and configure the slave chiller to broadcast the
value to the Master chiller.
REMOTE SPACE TEMPERATURE SENSOR (SPT) —
The sensor (part no. 33ZCT55SPT) is an accessory sensor that
is remotely mounted in the controlled space and used for space
temperature reset. The sensor should be installed as a wallmounted thermostat would be (in the conditioned space where
it will not be subjected to either a cooling or heating source or
direct exposure to sunlight, and 4 to 5 ft above the floor).
Space temperature sensor wires are to be connected to
terminals in the unit main control box. The space temperature
sensor includes a terminal block (SEN) and a RJ11 female
connector. The RJ11 connector is used access into the Carrier
Comfort Network® (CCN) at the sensor.
To connect the space temperature sensor (Fig. 8):
1. Using a 20 AWG twisted pair conductor cable rated for
the application, connect 1 wire of the twisted pair to one
SEN terminal and connect the other wire to the other
SEN terminal located under the cover of the space
temperature sensor.
2. Connect the other ends of the wires to terminals 3 and 4
on LVT located in the unit control box.
Units on the CCN can be monitored from the space at the
sensor through the RJ11 connector, if desired. To wire the RJ11
connector into the CCN (Fig. 9):

IMPORTANT: A shorted CCN bus cable will prevent some
routines from running and may prevent the unit from starting. If abnormal conditions occur, unplug the connector. If
conditions return to normal, check the CCN connector and
cable. Run new cable if necessary. A short in one section of
the bus can cause problems with all system elements on the
bus.
Table 15 — Thermistor Designations
PIN
CONNECTION
THERMISTOR INPUT
POINT
J8-13,14 (MBB) Cooler Leaving Fluid
J8-11,12 (MBB) Cooler Entering Fluid
J8-9,10 (MBB)
Circuit A Return Gas
Temperature (accessory)
J8-6,7 (MBB),
Outdoor-Air Temperature
LVT 4,13
Sensor (accessory) or Dual
LWT Sensor
J8-5,6 (MBB)
Accessory Remote Space
LVT-3,4
Temperature Sensor
J8-1,2
Condenser Entering Water
Temperature Sensor
J8-3,4
Condenser Leaving Water
Temperature Sensor

THERMISTOR
CLWT
CEWT
RGTA
OAT
SPT
CNDE
CNDL

LEGEND
LWT — Leaving Water Temperature
MBB — Main Base Board

Table 16 — Status Inputs
STATUS SWITCH
Condenser Flow Switch
Dual Set Point
Remote On/Off
Cooler Flow Switch Interlock
Compressor Fault Signal, A1
Compressor Fault Signal, A2
Compressor Fault Signal, A3

PIN CONNECTION POINT
LVT-11,17, J7-2, J6-2
LVT-12,13, J7-3,4
LVT-14,15
LVT-16,17, J6-2, J7-10
J9-11,12
J9-5,6
J9-8,9

Table 17 — Output Relays
RELAY
NO.
K1
K2
K3
K4
K5
K6
K7
K8
K9
K10
K11

DESCRIPTION
Energize Compressor A1
Energize Compressor A2
Energize Compressor A3
Energize Minimum Load Valve
Water Valve Open
Water Valve Close
Liquid Line Solenoid Valve
Crankcase Heater Relay (30MPA Only)
Chilled Water Pump
Condenser Fan/Pump
Alarm Relay

Table 18 — CCN Communication Bus Wiring
MANUFACTURER
Alpha
American
Belden
Columbia
Manhattan
Quabik

PART NO.
Regular Wiring
Plenum Wiring
1895
—
A21451
A48301
8205
884421
D6451
—
M13402
M64430
6130
—

IMPORTANT: The cable selected for the RJ11 connector
wiring MUST be identical to the CCN communication bus
wire used for the entire network. Refer to Table 18 for
acceptable wiring.
1. Cut the CCN wire and strip ends of the red (+), white
(ground), and black (–) conductors. (If another wire color
scheme is used, strip ends of appropriate wires.)

Sensors — The electronic control uses 2 to 7 thermistors to
sense temperatures for controlling chiller operation. See
Table 15. These sensors are outlined below. Thermistors

RED LED - STATUS

GREEN LED LEN (LOCAL EQUIPMENT NETWORK)

YELLOW LED CCN (CARRIER COMFORT NETWORK)
INSTANCE JUMPER

CEPL130346-01
K11

STATUS

K10

J10

LEN

CCN

J5
J6

Fig. 6 — Main Base Board

a30-4967

Fig. 7 — Enable/Off/Remote Contact Switch, and Emergency On/Off Switch Locations
T-55 SPACE
SENSOR

a30-4968
SPT (T10) PART NO. 33ZCT55SPT

SENSOR
SEN

SEN

LVT

TO CCN
COMM 1
BUS (PLUG)
AT UNIT

CCN+

CCN GND

4
3

CCN-

2
1

Fig. 8 — Typical Space Temperature
Sensor Wiring
Fig. 9 — CCN Communications Bus Wiring
to Optional Space Sensor RJ11 Connector
20

stages. The chilled fluid temperature set point can be automatically reset by the return fluid temperature, space, or outdoor-air
temperature reset features. It can also be reset from an external
4 to 20-mA signal (requires energy management module FIOP
or accessory).
The capacity control algorithm runs every 30 seconds. The
algorithm attempts to maintain the Control Point at the desired
set point. Each time it runs, the control reads the entering and
leaving fluid temperatures. The control determines the rate at
which conditions are changing and calculates 2 variables based
on these conditions. Next, a capacity ratio is calculated using
the 2 variables to determine whether or not to make any
changes to the current stages of capacity. This ratio value
ranges from –100 to +100%. If the next stage of capacity is a
compressor, the control starts (stops) a compressor when the
ratio reaches +100% (–100%). If installed, the minimum load
valve solenoid will be energized with the first stage of capacity.
Minimum load valve value is a fixed 30% in the total capacity
calculation. The control will also use the minimum load valve
solenoid as the last stage of capacity before turning off the last
compressor. A delay of 90 seconds occurs after each capacity
step change. Refer to Table 19.
MINUTES LEFT FOR START — This value is displayed
only in the network display tables (using Service Tool,
ComfortVIEW™ or ComfortWORKS® software) and
represents the amount of time to elapse before the unit will start
its initialization routine. This value can be zero without the
machine running in many situations. This can include being
unoccupied, ENABLE/OFF/REMOTE CONTACT switch in
the OFF position, CCN not allowing unit to start, Demand
Limit in effect, no call for cooling due to no load, and alarm or
alert conditions present. If the machine should be running and
none of the above are true, a minimum off time (DELY, see
below) may be in effect. The machine should start normally
once the time limit has expired.
MINUTES
OFF
TIME
(ConfigurationOPT2
DELY) — This user-configurable time period is used by the
control to determine how long unit operation is delayed after
power is applied/restored to the unit. Typically, this time period
is configured when multiple machines are located on a single
site. For example, this gives the user the ability to prevent all
the units from restarting at once after a power failure. A value
of zero for this variable does not mean that the unit should be
running.
LEAD/LAG DETERMINATION — This is a configurable
choice and is factory set to be automatic for all units unless the
unit is equipped with minimum load, then circuit A is lead
(ConfigurationOPT2 LLCS). The value can be changed
to Circuit A or Circuit B leading as desired. Set at automatic,
the control will sum the current number of logged circuit starts
and one-quarter of the current operating hours for each circuit.
The circuit with the lowest sum is started first. Changes to
which circuit is the lead circuit and which is the lag are also
made when total machine capacity is at 100% or when there is
a change in the direction of capacity (increase or decrease) and
each circuit’s capacity is equal.
CAPACITY CONTROL OVERRIDES — The following overrides will modify the normal operation of the routine.
Deadband Multiplier — The user configurable Deadband
Multiplier (ConfigurationSLCTZ.GN) has a default
value of 1.0. The range is from 1.0 to 4.0. When set to other
than 1.0, this factor is applied to the capacity Load/Unload
Factor. The larger this value is set, the longer the control will
delay between adding or removing stages of capacity. Figure
11 shows how compressor starts can be reduced over time if
the leaving water temperature is allowed to drift a larger
amount above and below the set point. This value should be set
in the range of 3.0 to 4.0 for systems with small loop volumes.
Figure 12 shows the operating envelope for the compressor.

2. Insert and secure the red (+) wire to terminal 5 of the
space temperature sensor terminal block.
3. Insert and secure the white (ground) wire to terminal 4 of
the space temperature sensor.
4. Insert and secure the black (–) wire to terminal 2 of the
space temperature sensor.
5. Connect the other end of the communication bus cable to
the remainder of the CCN communication bus.
This
factory-installed option (FIOP) or field-installed accessory is
used for the following types of temperature reset, demand
limit, and/or ice features:
• 4 to 20 mA leaving fluid temperature reset (requires
field-supplied 4 to 20 mA generator)
• 4 to 20 mA cooling set point reset (requires fieldsupplied 4 to 20 mA generator)
• Discrete inputs for 2-step demand limit (requires fieldsupplied dry contacts capable of handling a 24 vac,
50 mA load)
• 4 to 20 mA demand limit (requires field-supplied 4 to
20 mA generator)
• Discrete input for Ice Done switch (requires fieldsupplied dry contacts capable of handling a 24 vac,
50 mA load)
See Demand Limit and Temperature Reset sections on
pages 27 and 31 for further details.

Energy Management Module (Fig. 10) —

CAUTION
Care should be taken when interfacing with other manufacturer’s control systems due to possible power supply
differences, full wave bridge versus half wave rectification.
The two different power supplies cannot be mixed.
ComfortLink™ controls use half wave rectification. A
signal isolation device should be utilized if a full wave
bridge signal generating device is used.
A proof-ofcooler flow device is factory installed in all chillers.

Loss-of-Cooler Flow Protection —

Condenser Flow Protection — A proof-of-condenser flow protection accessory can be field installed in the condenser water piping of all chillers. The unit must be configured
for the input to be enabled.
Thermostatic Expansion Valves (TXV) — All
units are equipped from the factory with conventional TXVs.
The 30MPA units and 30MPW units with medium temperature
brine also have factory-installed liquid line solenoids. The liquid line solenoid valves are not intended to be a mechanical
shut-off. For 30MPW units, when service is required, reclaim
the refrigerant from the system.
For 30MPA units when service is required, the compressor
and evaporator can be serviced by closing the factory-installed
liquid line service valve and field-installed discharge line service valve. After the valves are closed, reclaim the refrigerant
from the system.
The TXV is set at the factory to maintain approximately 8 to
12° F (4.4 to 6.7° C) suction superheat leaving the cooler by
monitoring the proper amount of refrigerant into the cooler. All
TXVs are adjustable, but should not be adjusted unless absolutely necessary.
Capacity Control — The control system cycles compressors, digital scroll modulting solenoid (if equipped), and
minimum load valve solenoids (if equipped) to maintain the
user-configured leaving chilled fluid temperature set point. Entering fluid temperature is used by the main base board (MBB)
to determine the temperature drop across the cooler and is used
in determining the optimum time to add or subtract capacity
21

Slow Change Override — The control prevents the capacity
stages from being changed when the leaving fluid temperature
is close to the set point (within an adjustable deadband) and
moving towards the set point.

First Stage Override — If the current capacity stage is zero,
the control will modify the routine with a 1.2 factor on adding
the first stage to reduce cycling. This factor is also applied
when the control is attempting to remove the last stage of
capacity.

LEN

TEST 1

PWR

STATUS

CEPL130351-01

CEBD430351-0396-01C

J7
J6

TEST 2

GREEN LED LEN (LOCAL EQUIPMENT NETWORK)

RED LED - STATUS

ADDRESS
DIP SWITCH

Fig. 10 — Energy Management Module
Table 19 — Part Load Data Percent Displacement, Standard Units with Minimum Load Valve
30MP UNIT SIZE
015
020
030

040

045

CONTROL
STEPS
1
2
3
1
2
3
1
2
3
1
2
3
4
1
2
3
4

*Hot gas bypass (minimum load) valve energized.

CAPACITY STEPS
(% Displacement)
18*
50
100
25*
50
100
34*
50
100
21*
33
67
100
22*
33
67
100

NOTE: These capacity steps may vary due to different capacity
staging sequences.

2 STARTS

DEADBAND EXAMPLE
47

46
45

LWT (F)

LWT (C)

44
43
42

41
0

200

400

600

800

1000
3 STARTS

TIME (SECONDS)

LEGEND
LWT — Leaving Water Temperature

STANDARD
DEADBAND
MODIFIED
DEADBAND

Fig. 11 — Deadband Multiplier
170
160
150
140
130

SCT (F)

120
110
100
90
80
70
60
50
40
30
-30

-20

-10

SST (F)

LEGEND
SCT
SST

a30-4969

— Saturated Condensing Temperature
— Saturated Suction Temperature

Fig. 12 — Operating Envelope for R-410A Compressor
Ramp Loading
—
Ramp
loading
(ConfigurationSLCTCRMP) limits the rate of change of leaving
fluid temperature. If the unit is in a Cooling mode and configured for Ramp Loading, the control makes 2 comparisons before deciding to change stages of capacity. The control calculates a temperature difference between the control point and
leaving fluid temperature. If the difference is greater than 4° F
(2.2° C) and the rate of change (°F or °C per minute) is more
than the configured Cooling Ramp Loading value (CRMP),
the control does not allow any changes to the current stage of
capacity.
Low Entering Fluid Temperature Unloading — When the
entering fluid temperature is below the control point, the
control will attempt to remove 25% of the current stages being
used. If exactly 25% cannot be removed, the control removes
an amount greater than 25% but no more than necessary. The
lowest stage will not be removed.
Hot Gas Bypass — If equipped, the hot gas bypass valve is
energized only when one compressor is running on circuit A. If
the close control feature is enabled the hot gas bypass valve

may be used as needed to obtain leaving fluid temperature
close to set point.
Cooler Freeze Protection — The control will try to prevent
shutting the chiller down on a Cooler Freeze Protection alarm
by removing stages of capacity. If the cooler fluid selected
is Water, the freeze point is 34 F (1.1 C). If the cooler fluid
selected is Brine, the freeze point is the Brine Freeze Point (Set
PointsFRZBR.FZ). This alarm condition (A207) only
references leaving fluid temperature and NOT Brine Freeze
point. If the cooler leaving fluid temperature is less than the
freeze point plus 2.0° F (1.1° C), the control will immediately
remove one stage of capacity. This can be repeated once every
30 seconds.
Low Saturated Suction Protection — The control will try to
prevent shutting a circuit down due to low saturated suction
conditions by removing stages of capacity. The circuit alert
condition (T116) compares saturated suction temperature to the
configured Brine Freeze Point (Set PointsFRZBR.FZ).
The Brine Freeze point is a user-configurable value that must
be left at 34 F (1.1 C) for 100% water systems. A lower value
23

may be entered for systems with brine solutions, but this value
should be set according to the freeze protection level of the
brine mixture. Failure to properly set this brine freeze point value may permanently damage the brazed plate heat exchanger.
The control will initiate Mode 7 (Circuit A) to indicate a circuit’s capacity is limited and that eventually the circuit may
shut down.

Cooling Set Point Select
SINGLE — Unit operation is based on Cooling Set Point 1
(Set PointsCOOLCSP.1).
DUAL SWITCH — Unit operation is based on Cooling Set
Point 1 (Set PointsCOOLCSP.1) when the Dual Set
Point switch contacts are open and Cooling Set Point 2 (Set
PointsCOOLCSP.2) when they are closed.
DUAL CCN OCCUPIED — Unit operation is based on
Cooling Set Point 1 (Set PointsCOOLCSP.1) during the
Occupied mode and Cooling Set Point 2 (Set
PointsCOOLCSP.2) during the Unoccupied mode as
configured under the local occupancy schedule accessible only
from CCN. Schedule Number in Table SCHEDOVR (See Appendix B) must be configured to 1. If the Schedule Number is
set to 0, the unit will operate in a continuous 24-hr Occupied
mode. Control method must be configured to 0 (switch). See
Table 20.
4 TO 20 mA INPUT — Unit operation is based on an external
4 to 20 mA signal input to the Energy Management Module
(EMM).
Cooler Pump Control — The AquaSnap® 30MP machines are configured with the Cooler Pump Control (ConfigurationOPT1CPC) = ON.
The maximum load allowed for the Chilled Water Pump
Starter is 5 VA sealed, 10 VA inrush at 24 volts. The starter coil
is powered from the chiller control system. The starter should
be wired between LVT 24 and TB3-1. If equipped, the field-installed chilled water pump starter auxiliary contacts should be
connected in series with the chilled water flow switch between
LVT 16 and LVT 17.

Operation of Machine Based on Control
Method and Cooling Set Point Selection Settings — Machine On/Off control is determined by the

configuration of the Control Method
(Configuration
OPT2CTRL) and Cooling Set Point Select
(ConfigurationSLCTCLSP) variables. All units are factory configured with Cooling Set Point Select set to 0 (single
set point). With the control method set to 0, simply switching
the Enable/Off/Remote Contact switch to the Enable or
Remote Contact position (external contacts closed) will put the
chiller in an occupied state. The control mode (Run
StatusVIEWSTAT) will be 1 (OFF LOCAL) when the
switch is Off and will be 5 (ON LOCAL) when in the Enable
position or Remote Contact position with external contacts
closed.
Two other control methods are available for Machine On/
Off control:
OCCUPANCY
SCHEDULE
(ConfigurationOPT2
CTRL = 1) — The main base board will use the operating
schedules as defined under the Time Clock mode in the scrolling marquee display. These schedules are identical. The schedule number must be set to 1 for local schedule.
The schedule number can be set anywhere from 65 to 99
for operation under a CCN global schedule. The Enable/Off/
Remote Contact must be in the Enable or Remote Contact position. The control mode (Run StatusVIEWSTAT) will be
1 when the switch is Off. The control mode will be 3 when the
Enable/Off/Remote Contact switch input is On and the time of
day is during an unoccupied period. Similarly, the control
mode will be 7 when the time of day is during an occupied
period.
CCN SCHEDULE (ConfigurationOPT2CTRL =
2) — An external CCN device such as Chillervisor System
Manager controls the On/Off state of the machine. This CCN
device forces the variable ‘CHIL_S_S’ between Start/Stop to
control the chiller. The control mode (Run Status
VIEWSTAT) will be 1 when the switch is Off. The control mode will be 2 when the Enable/Off/Remote Contact
switch input is On and the CHIL_S_S variable is ‘Stop.’
Similarly, the control mode will be 6 when the CHIL_S_S variable is ‘Start.’
Table 20 illustrates how the control method and cooling set
point select variables direct the operation of the chiller and the
set point to which it controls. The illustration also shows the
ON/OFF state of the machine for the given combinations.

Ice Mode — When Ice Mode is enabled Cooling Setpoint

Select must be set to Dual Switch, Dual 7 day or Dual CCN
Occupied and the Energy Management Module (EMM) must
be installed. Unit operation is based on Cooling Setpoint 1
(CSP.1) during the Occupied mode, Ice Setpoint (CSP.3) during the Unoccupied mode with the Ice Done contacts open and
Cooling Setpoint 2 (CSP.2) during the Unoccupied mode with
the Ice Done contacts closed. These 3 set points can be utilized
to develop your specific control strategy.

Service Test (See Table 4) — Both main power and

control circuit power must be on.
The Service Test function should be used to verify proper
operation of condenser output, compressors, minimum load
valve solenoid (if installed), cooler pump, and remote alarm relay. To use the Service Test mode, the Enable/Off/Remote Contact switch must be in the OFF position. Use the display keys
and Table 4 to enter the mode and display TEST. Press
ENTER twice so that OFF flashes. Enter the password if required. Use either arrow key to change the TEST value to the
ON position and press ENTER . Press ESCAPE and the
button to enter the OUTS or COMP sub-mode.

Table 20 — Control Methods and Cooling Set Points
CONTROL
TYPE
(CTRL)
0 (switch)
2 (Occupancy)
3 (CCN)

OCCUPANCY
STATE
Occupied
Unoccupied
Occupied
Unoccupied
Occupied
Unoccupied

0
(single)
ON,CSP1
ON,CSP1
ON,CSP1
OFF
ON,CSP1
ON,CSP1

COOLING SET POINT SELECT (CLSP)
1
2
(dual, switch)
(dual, occ)
ON*
ON,CSP1
ON*
ON,CSP2
ON*
Illegal
OFF
Illegal
ON*
ON,CSP1
ON*
ON,CSP2

*Dual set point switch input used. CSP1 used when switch input is open. CSP2 used when switch input is closed.
†Cooling set point determined from 4 to 20 mA input to energy management module (EMM) to terminals TB6-3,5.

3
(4 to 20 mA)
ON†
ON
ON†
OFF
ON†
ON†

Test the condenser output, cooler pump, liquid line solenoid
valve (30MPA only), crankcase heater, water valve (accessory), and alarm relay by changing the item values from OFF to
ON. These discrete outputs are then turned off if there is no
keypad activity for 10 minutes. When testing compressors,
lead compressor must be started first. All compressor outputs
can be turned on, but the control will limit the rate by staging
one compressor per minute. Minimum load valve can be tested
with the compressors on or off. The relays under the COMP
mode will stay on for 10 minutes if there is no keypad activity.
Compressors will stay on until they are turned off by the operator. The Service Test mode will remain enabled for as long as
there is one or more compressors running. All safeties are monitored during this test and will turn a compressor, circuit or the
machine off if required. Any other mode or sub-mode can be
accessed, viewed, or changed during the TEST mode. The
STAT item (Run StatusVIEW) will display “0” as long as
the Service mode is enabled. The TEST sub-mode value must
be changed back to OFF before the chiller can be switched to
Enable or Remote contact for normal operation.

Configuring and Operating Dual Chiller Control — The dual chiller routine is available for the control of

two units supplying chilled fluid on a common loop. This
control algorithm is designed for parallel fluid flow arrangement
only. One chiller must be configured as the master chiller, the
other as the slave. An additional leaving fluid temperature
thermistor (Dual Chiller LWT) must be installed as shown in
Fig. 13 and 14 and connected to the master chiller. Refer to Sensors section, page 19, for wiring. The CCN communication bus
must be connected between the two chillers. Connections can be
made to the CCN screw terminals on LVT. Refer to Carrier
Comfort Network® Interface section, page 14, for wiring information. Configuration examples are shown in Tables 21 and 22.
Refer to Table 21 for dual chiller configuration. In this
example the master chiller will be configured at address 1 and
the slave chiller at address 2. The master and slave chillers
must reside on the same CCN bus (ConfigurationCCN
CCNB) but cannot have the same CCN address (ConfigurationCCNCCNA). Both master and slave chillers must
have Lead/Lag Chiller Enable (ConfigurationRSET
LLEN) configured to ENBL. Master/Slave Select (ConfigurationRSET MSSL) must be configured to MAST for
the master chiller and SLVE for the slave. Also in this example,
the master chiller will be configured to use Lead/Lag Balance
Select (ConfigurationRSETLLBL) and Lead/Lag Balance Delta (ConfigurationRSETLLBD) to even out the
chiller run-times weekly. The Lag Start Delay (ConfigurationRSETLLDY) feature will be set to 10 minutes. This
will prevent the lag chiller from starting until the lead chiller
has been at 100% capacity for the length of the delay time. Parallel configuration (ConfigurationRSETPARA) can
only be configured to YES. The variables LLBL, LLBD and
LLDY are not used by the slave chiller.
Dual chiller start/stop control is determined by configuration of Control Method (ConfigurationOPT1CTRL) of
the Master chiller. The Slave chiller should always be configured for CTRL=0 (Switch). If the chillers are to be controlled
by Remote Contacts, both Master and Slave chillers should be
enabled together. Two separate relays or one relay with
two sets of contacts may control the chillers. The Enable/Off/
Remote Contact switch should be in the Remote Contact
position on both the Master and Slave chillers. The Enable/Off/
Remote Contact switch should be in the Enable position for
CTRL=2 (Occupancy) or CTRL=3 (CCN Control).
Both chillers will stop if the Master chiller Enable/Off/
Remote Contact switch is in the Off position. If the Emergency
Stop switch is turned off or an alarm is generated on the Master
chiller the Slave chiller will operate in a Stand-Alone mode.
If the Emergency Stop switch is turned off or an alarm is
generated on the Slave chiller the Master chiller will operate in
a Stand-Alone mode.
The master chiller controls the slave chiller by changing its
Control Mode (Run StatusVIEWSTAT) and its operating setpoint or Control Point (Run StatusVIEWCT.PT).

Cooler Pump Sequence of Operation — At anytime the unit is in an ON status, as defined by the one of the
following conditions, the cooler pump relay will be enabled.
1. The Enable-Off-Remote Switch in ENABLE,
(CTRL=0).
2. Enable-Off-Remote Switch in REMOTE with a
Start-Stop remote contact closure (CTRL=0).
3. An Occupied Time Period from an Occupancy Schedule
in combination with items 1 or 2 (CTRL=2).
4. A CCN Start-Stop Command to Start in combination
with items 1 or 2 (CTRL=3).
There are certain alarm conditions and Operating Modes
that will turn the cooler pump relay ON. This sequence will describe the normal operation of the pump control algorithm.
When the unit cycles from an "On" state to an "Off' state,
the cooler pump output will remain energized for the Cooler
Pump Shutdown Delay (ConfigurationOPT1PM.DY).
This is configurable from 0 to 10 minutes. The factory default
is 1 minute. If the pump output was deenergized during the
transition period, the pump output will not be energized.
The Cooler Pump Relay will be energized when the machine is "On." The chilled water pump interlock circuit consists
of a chilled water flow switch and a field-installed chilled water
pump interlock. If the chilled water pump interlock circuit does
not close within five (5) minutes of starting, an A200 - Cooler
Flow/Interlock failed to close at Start-Up alam1 will be generated and chiller will not be allowed to start.
If the chilled water pump interlock or chilled water flow
switch opens for at least three (3) seconds after initially being
closed, an A201 - Cooler Flow 1 Interlock Contacts Opened
During Normal Operation alarm will be generated and the machine will stop.
Condenser Pump/Condenser Fan Output Control — The main base board (MBB) has the capability to

control either a condenser fan output or a condenser pump output depending on the unit configuration.
If the unit is configured for Configuration
UNITTYPE = 2 (air cooled), then the output will be off as
long as capacity is equal to 0 and will be energized 5 seconds
before a compressor is started and remain energized until capacity is 0 again.
If the unit is configured for Configuration
UNITTYPE = 3 (water cooled), then the output will be used
for consenser pump control and additional configuration is required. To enable the condenser pump control use ConfigurationOPT1DPME. The pump can be configured for no
pump control, on when occupied, and on when capacity is
greater than 0.

RETURN
FLUID

MASTER
CHILLER
SLAVE
CHILLER

THERMISTOR
WIRING*
LEAVING
FLUID

INSTALL DUAL CHILLER LWT
LEAVING FLUID TEMPERATURE
THERMISTOR (T10) HERE

*Depending on piping sizes, use either:
• HH79NZ014 sensor/10HB50106801 well (3-in. sensor/well)
• HH79NZ029 sensor/10HB50106802 well (4-in. sensor/well)

Fig. 13 — Dual Chiller Thermistor Location

Table 21 — Dual Chiller Configuration (Master Chiller Example)
SUB-MODE

ITEM

KEYPAD ENTRY

DISPLAY

ITEM EXPANSION

COMMENTS

ENTER

CTRL

CONTROL METHOD

ENTER

SWITCH

DEFAULT 0

ESCAPE

OPT2

CCN ADDRESS

DEFAULT 1

CCN BUS NUMBER

DEFAULT 0

DISP
UNIT
OPT1

OPT2

CTRL

CCN
CCNA

ENTER

1
CCNB

CCN
CCNB

ENTER

ESCAPE

CCN
PROCEED TO
SUBMODE RESET

RSET
RSET

ENTER

LLEN

MSSL

CRST

COOLING RESET TYPE

LLEN

LEAD/LAG CHILLER ENABLE

ENTER

DSBL

SCROLLING STOPS

ENTER

DSBL

VALUE FLASHES

ENBL

SELECT ENBL

ENTER

ENBL

ESCAPE

LLEN

LEAD/LAG CHILLER ENABLE

MSSL

MASTER /SLAVE SELECT

ENTER

MAST

MASTER /SLAVE SELECT

ESCAPE

MSSL
SLVA

SLVA

CHANGE ACCEPTED

DEFAULT MAST

SLAVE ADDRESS

ENTER

SCROLLING STOPS

ENTER

VALUE FLASHES

SELECT 2

ENTER

ESCAPE

SLVA

SLAVE ADDRESS

LLBL
LLBL

15 ITEMS

CHANGE ACCEPTED

LEAD/LAG BALANCE SELECT

ENTER

SCROLLING STOPS

ENTER

VALUE FLASHES

SELECT 2 - Automatic

Table 21 — Dual Chiller Configuration (Master Chiller Example) (cont)
SUB-MODE
RSET

ITEM

KEYPAD ENTRY

DISPLAY

ITEM EXPANSION

COMMENTS

LLBL

ENTER

LEAD/LAG BALANCE SELECT

CHANGE ACCEPTED

ESCAPE

LLBL

LLBD

LEAD/LAG BALANCE DELTA

ENTER

168

LEAD/LAG BALANCE DELTA

ESCAPE

LLBD
LLDY

LLDY

PARA

DEFAULT 168

LAG START DELAY

ENTER

SCROLLING STOPS

ENTER

VALUE FLASHES

SELECT 10

ENTER

ESCAPE

LLDY

ESCAPE

RSET

ENTER

YES

LAG START DELAY

CHANGE ACCEPTED

MASTER COMPLETE

NOTES:
1. Master Control Method (CTRL) can be configured as 0-Switch, 2-Occupancy or 3-CCN.
2. Parallel Configuration (PARA) cannot be changed.

Temperature Reset — The control system is capable of
handling leaving-fluid temperature reset based on return cooler
fluid temperature. Because the change in temperature through
the cooler is a measure of the building load, the return temperature reset is in effect an average building load reset method.
The control system is also capable of temperature reset based
on outdoor-air temperature (OAT), space temperature (SPT), or
from an externally powered 4 to 20 mA signal. Accessory sensors must be used for SPT reset (33ZCT55SPT) and for OAT
reset (HH79NZ014). The energy management module (EMM)
must be used for temperature reset using a 4 to 20 mA signal.
See Tables 23 and 24.

DIMENSIONS in. (mm)
A
B
3.10 (78.7)
1.55 (39.4)
4.10 (104.1)
1.28 (32.5)

PART
NUMBER
10HB50106801
10HB50106802
A

0.505/0.495
0.61
DIA

1/4 N.P.T.

6” MINIMUM
CLEARANCE FOR
THERMISTOR
REMOVAL

Fig. 14 — Dual Leaving Water Thermistor Well

Table 22 — Dual Chiller Configuration (Slave Chiller Example)
SUB-MODE

ITEM

KEYPAD ENTRY

DISPLAY

ITEM EXPANSION

COMMENTS

ENTER

CTRL

CONTROL METHOD

SWITCH

DEFAULT 0

CCN ADDRESS

SCROLLING STOPS

DISP
UNIT
OPT1

OPT2

CTRL
ESCAPE

OPT2
CCN
CCNA

CCNA

ENTER

VALUE FLASHES

SELECT 2
(SEE NOTE 2)

CCN
CCNA

CCNB

ENTER

ESCAPE

CCN

ENTER

ESCAPE

CCN

CCN ADDRESS

CHANGE ACCEPTED

CCN BUS NUMBER

DEFAULT 0
(SEE NOTE 3)

PROCEED TO
SUBMODE RSET

RSET
RSET

ENTER

LLEN

CRST

COOLING RESET TYPE

LLEN

LEAD/LAG CHILLER ENABLE

ENTER

DSBL

SCROLLING STOPS

ENTER

DSBL

VALUE FLASHES

ENBL

SELECT ENBL

ENTER

ENBL

ESCAPE

LLEN

LEAD/LAG CHILLER ENABLE

MSSL
MSSL

MSSL

15 ITEMS

CHANGE ACCEPTED

MASTER /SLAVE SELECT

ENTER

MAST

SCROLLING STOPS

ENTER

MAST

VALUE FLASHES

SLVE

SELECT SLVE

ENTER

SLVE

ESCAPE

MSSL

ESCAPE

RSET

MASTER /SLAVE SELECT

CHANGE ACCEPTED

SLAVE COMPLETE

NOTES:
1. Slave Control Method (CTRL) must be configured for 0.
2. Slave CCN Address (CCNA) must be different than Master.
3. Slave CCN Bus Number (CCNB) must be the same as Master
4. Slave does not require SLVA, LLBL, LLBD, or LLDY to be configured.

Table 23 — Menu Configuration of 4 to 20 mA Cooling Set Point Control
MODE
(RED LED)

KEYPAD SUB-MODE KEYPAD
ENTRY
ENTRY

ITEM

DISPLAY

ITEM
EXPANSION

CLSP

COOLING SETPOINT SELECT

COMMENT

DISP

ENTER

UNIT
OPT1
OPT2
CCN
CONFIGURATION

RSET
SLCT

ENTER

Scrolling Stops

ENTER

Flashing ‘0’

Select ‘3’

Change Accepted

ENTER

Table 24 — 4 to 20 mA Reset
SUB-MODE

KEYPAD
ENTRY

DISPLAY

ITEM
EXPANSION

CRST

COOLING RESET
TYPE

MA.DG

5.0 F
(2.8 C)

DEGREES COOL
RESET

ITEM

RSET
ENTER

COMMENT
0 = no reset
1 = 4 to 20 mA input
2 = Outdoor air temp
3 = Return Fluid
4 = Space Temperature
Default: 0° F (0° C) Reset at 20 mA
Range: –30 to 30 F (–16.7 to 16.7 C)

NOTE: The example above shows how to configure the chiller for
4 to 20 mA reset. No reset will occur at 4.0 mA input, and a 5.0 F
reset will occur at 20.0 mA. An EMM (energy management module)
is required.

RM.NO should be set to the temperature that no reset should
occur. The variable RM.F should be set to the temperature that
maximum reset is to occur. The variable RM.DG should be set
to the maximum amount of reset desired. Figures 15 and 16 are
examples of outdoor air and space temperature resets.
To use return reset, four variables must be configured. In the
Configuration mode under the sub-mode RSET, items CRST,
RT.NO, RT.F and RT.DG must be properly set. See Table 26
— Configuring Return Temperature Reset. This example provides 5.0 F (2.8 C) chilled water set point reset at 2.0 F (1.1 C)
cooler T and 0° F (0° C) reset at 10.0 F (5.6 C) cooler T. The
variable RT.NO should be set to the cooler temperature difference (T) where no chilled water temperature reset should occur. The variable RT.F should be set to the cooler temperature
difference where the maximum chilled water temperature reset
should occur. The variable RM.DG should be set to the maximum amount of reset desired.
To verify that reset is functioning correctly proceed to Run
Status mode, sub-mode VIEW, and subtract the active set point
(Run StatusVIEWSETP) from the control point (Run
StatusVIEWCTPT) to determine the degrees reset.

IMPORTANT: Care should be taken when interfacing with
other control systems due to possible power supply differences: full wave bridge versus half wave rectification. Connection of control devices with different power supplies
may result in permanent damage. ComfortLink™ controls
incorporate power supplies with half wave rectification. A
signal isolation device should be utilized if the signal generator incorporates a full wave bridge rectifier.
To use outdoor air or space temperature reset, four variables
must be configured. In the Configuration mode under the submode RSET, items (ConfigurationRSETCRST),
(Configuration
(ConfigurationRSETRM.NO),
RSETRM.F), and (ConfigurationRSETRT.DG)
must be properly set. See Table 25 — Configuring Outdoor Air
and Space Temperature Reset. The outdoor air reset example
provides 0° F (0° C) chilled water set point reset at 85.0 F
(29.4 C) outdoor-air temperature and 15.0 F (8.3 C) reset at
55.0 F (12.8 C) outdoor-air temperature. The space temperature reset example provides 0° F (0° C) chilled water set point
reset at 72.0 F (22.2 C) space temperature and 6.0 F (3.3 C) reset at 68.0 F (20.0 C) space temperature. The variable CRST
should be configured for the type of reset desired. The variable

Table 25 — Configuring Outdoor Air and Space Temperature Reset
MODE
(RED LED)

KEYPAD
ENTRY

SUBMODE

ENTER

DISP

KEYPAD
ENTRY

DISPLAY
ITEM

Outdoor
Air

Space

ITEM
EXPANSION

COMMENT

CRST

COOLING RESET
TYPE

2 = Outdoor-Air Temperature
(Connect to LVT-4,5)
4 = Space Temperature
(Connect to LVT-3,4)

RM.NO*

85 °F

72 °F

REMOTE - NO
RESET TEMP

Default: 125.0 F (51.7 C)
Range: 0° to125 F

RM.F

55 °F

68 °F

REMOTE - FULL
RESET TEMP

Default: 0.0° F (-17.7 C)
Range: 0° to 125 F

RM.DG

15 °F

6 °F

REMOTE - DEGREES
RESET

UNIT
OPT1
OPT2
CCN
CONFIGURATION

ENTER

RSET

Default: 0° F (0° C)
Range: –30 to 30 F
(–34.4 to -1.1 °C)

*1 item skipped in this example.

Table 26 — Configuring Return Temperature Reset
MODE
(RED LED)

KEYPAD
KEYPAD
SUB-MODE
ENTRY
ENTRY

ITEM

DISPLAY

ITEM
EXPANSION

DISP

ENTER

TEST

ON/OFF

TEST DISPLAY LEDs

UNIT

ENTER

TYPE

UNIT TYPE

OPT1

ENTER

FLUD

COOLER FLUID

OPT2

ENTER

CTRL

CONTROL METHOD

ENTER

COMMENT

CCN
ENTER

CONFIGURATION
RSET

0 = No Reset
1 = 4 to 20 mA Input (EMM required)
(Connect to EMM TB6-2,3)
COOLING RESET TYPE 2 = Outdoor-Air Temperature
3 = Return Fluid
4 = Space Temperature
(Connect to TB5-5,6)

CRST

RT.NO*

10.0 F

RETURN FLUID - NO
RESET TEMP

Default: 10.0 F (5.6 C)
Range: 0° to10 F COOLER T

RT.F

2.0 F

RETURN FLUID - FULL
RESET TEMP

Default: 0 F (–17.8 C)
Range: 0° to 30 F COOLER T

RT.DG

5.0 F

RETURN - DEGREES
RESET

*1 item skipped in this example.

Default: 0 F (0 C)
Range: –30 to 30°F (–16.7 to 16.7 C)

LWT

Under normal operation, the chiller will maintain a constant
leaving fluid temperature approximately equal to the chilled
fluid set point. As the cooler load varies, the entering cooler
fluid will change in proportion to the load as shown in Fig. 17.
Usually the chiller size and leaving-fluid temperature set point
are selected based on a full-load condition. At part load, the fluid temperature set point may be colder than required. If the
leaving fluid temperature was allowed to increase at part load,
the efficiency of the machine would increase.
Return temperature reset allows for the leaving temperature
set point to be reset upward as a function of the return fluid
temperature or, in effect, the building load.

EWT
LWT

— Entering Water (Fluid) Temperature
— Leaving Water (Fluid) Temperature

Demand Limit — Demand limit is a feature that allows

the unit capacity to be limited during periods of peak energy usage. There are 3 types of demand limiting that can be configured. The first type is through 2-stage switch control, which will
reduce the maximum capacity to 2 user-configurable percentages. The second type is by 4 to 20 mA signal input which will reduce the maximum capacity linearly between 100% at a 4 mA
input signal (no reduction) down to the user-configurable level
at a 20 mA input signal. The third type uses the CCN Loadshed
module and has the ability to limit the current operating capacity to maximum and further reduce the capacity if required.
NOTE: The 2-stage switch control and 4 to 20-mA input signal types of demand limiting require the energy management
module (EMM).

LEGEND

Fig. 17 — Standard Chilled Fluid
Temperature Control — No Reset
To use demand limit, select the type of demand limiting to
use. Then configure the demand limit set points based on the
type selected.
DEMAND LIMIT (2-Stage Switch Controlled) — To configure demand limit for 2-stage switch control set the Demand
Limit Select (ConfigurationRSETDMDC) to 1. Then
configure the 2 Demand Limit Switch points (ConfigurationRSETDLS1) and (ConfigurationRSETDLS2)
to the desired capacity limit. See Table 27. Capacity steps are
controlled by 2 relay switch inputs field wired to LVT as shown
in Fig. 5.
For demand limit by 2-stage switch control, closing the first
stage demand limit contact will put the unit on the first demand
limit level. The unit will not exceed the percentage of capacity
entered as Demand Limit Switch 1 set point (DLS1). Closing
contacts on the second demand limit switch prevents the unit
from exceeding the capacity entered as Demand Limit Switch
2 set point. The demand limit stage that is set to the lowest demand takes priority if both demand limit inputs are closed. If
the demand limit percentage does not match unit staging, the
unit will limit capacity to the closest capacity stage.
To disable demand limit configure DMDC to 0. See
Table 27.
EXTERNALLY POWERED DEMAND LIMIT (4 to
20 mA Controlled) — To configure demand limit for 4 to 20
mA control set the Demand Limit Select (ConfigurationRSETDMDC) to 2. Then configure the Demand
Limit at 20 mA (ConfigurationRSETDM20) to the
maximum loadshed value desired. Connect the output from an
externally powered 4 to 20 mA signal to terminal block LVT,
terminals 7 and 8 (+,–). Refer to the unit wiring diagram for
these connections to the optional/accessory energy management module and terminal block. The control will reduce allowable capacity to this level for the 20 mA signal. See Table
27 and Fig. 18.

LEGEND
LWT — Leaving Water (Fluid) Temperature

Fig. 15 — Outdoor-Air Temperature Reset

CAUTION
Care should be taken when interfacing with other manufacturer’s control systems, due to possible power supply
differences, full wave bridge versus half wave rectification.
The two different power supplies cannot be mixed.
ComfortLink™ controls use half wave rectification. A signal isolation device should be utilized if a full wave bridge
signal generating device is used.

LEGEND
LWT — Leaving Water (Fluid) Temperature

Fig. 16 — Space Temperature Reset

length of time that a loadshed condition is allowed to exist. The
control will disable the Redline/Loadshed command if no
Cancel command has been received within the configured
maximum loadshed time limit.

DEMAND LIMIT (CCN Loadshed Controlled) — To configure Demand Limit for CCN Loadshed control set the Demand Limit Select (ConfigurationRSETDMDC) to 3.
Then configure the Loadshed Group Number (ConfigurationRSETSHNM), Loadshed Demand Delta (ConfigurationRSETSHDL), and Maximum Loadshed Time
(ConfigurationRSETSHTM). See Table 27.
The Loadshed Group number is established by the CCN
system designer. The ComfortLink™ controls will respond to a
Redline command from the Loadshed control. When the
Redline command is received, the current stage of capacity is
set to the maximum stages available. Should the loadshed control send a Loadshed command, the ComfortLink controls will
reduce the current stages by the value entered for Loadshed
Demand delta. The Maximum Loadshed Time is the maximum

Cooling Set Point (4 to 20 mA) — A field supplied
and generated, externally powered 4 to 20 mA signal can be
used to provide the leaving fluid temperature set point. Connect
the signal to LVT-10,8 (+,–). See Table 27 for instructions to
enable the function. Figure 19 shows how the 4 to 20 mA signal is linearly calculated on an overall 10 F to 80 F range for
fluid types (ConfigurationOPT1FLUD) 1 or 2. The set
point will be limited by the fluid (FLUD) type. Be sure that the
chilled water loop is protected at the lowest temperature.

MAX. ALLOWABLE LOAD (%)

100

50% CAPACITY AT 20 mA

80
60
40 100% CAPACITY AT 4 mA
75% CAPACITY AT 12 mA
20

12
8
10
14
DEMAND LIMIT SIGNAL – 4 - 20 mA INPUT

Fig. 18 — 4 to 20-mA Demand Limiting

100
(38)
90
(32)
80
(27)

SET POINT, F (C)

70
(21)

MAXIMUM
SET POINT
70 F (21.1 C)

60
(15)
50
(10)
40
(4.4)
(FLUD = 1) MINIMUM
SET POINT 38 F (3.3 C)

30
(-1)
20
(-7)
(FLUD = 2) MINIMUM
SET POINT 14 F (-10 C)

10
(-12)
0
(-17)
4

6.3

8.6

10.9

13.1

4 TO 20 mA SIGNAL TO EMM

EMM — Energy Management Module

Fig. 19 — Cooling Set Point (4 to 20 mA)

15.4

17.7

Table 27 — Configuring Demand Limit
MODE
CONFIGURATION

KEYPAD
ENTRY

SUB-MODE

KEYPAD
ENTRY

ITEM

DISPLAY

ITEM EXPANSION

ENTER

DISP

ENTER

TEST

ON/OFF

Test Display LEDs

UNIT

ENTER

TYPE

Unit Type

OPT1

ENTER

FLUD

Cooler Fluid

OPT2

ENTER

CTRL

Control Method

CCN

ENTER

CCNA

CCN Address

RSET

ENTER

CRST

Cooling Reset Type

COMMENT

Default: 0
0 = None
1 = Switch
2 = 4 to 20 mA Input
3 = CCN Loadshed

DMDC*

Demand Limit Select

DM20

XXX %

Demand Limit at 20 mA

Default: 100%
Range: 0 to 100

SHNM

XXX

Loadshed Group
Number

Default: 0
Range: 0 to 99

SHDL

XXX%

Loadshed Demand
Delta

Default: 0%
Range: 0 to 60%

SHTM

XXX MIN

Maximum Loadshed
Time

Default: 60 min.
Range: 0 to 120 min.

DLS1

XXX %

Demand Limit
Switch 1

Default: 80%
Range: 0 to 100%

DLS2

XXX %

Demand Limit
Switch 2

Default: 50%
Range: 0 to 100%

*Seven items skipped in this example.

5. Oil should be visible in the compressor sightglass(es).
See Fig. 20. An acceptable oil level in the compressors is
from 1/8 to 3/8 of sight glass when the compressors are off.
Adjust the oil level as required. See Oil Charge section on
page 37 for Carrier approved oils.
6. Crankcase heaters must be firmly attached to compressors, and must be on for 24 hours prior to start-up
(30MPA units only).
7. Electrical power source must agree with unit nameplate.
8. Check rotation of scroll compressors. Monitor control
alarms during first compressor start up for reverse rotation protection alarm.

PRE-START-UP
IMPORTANT: Before beginning Pre-Start-Up or Start-Up,
complete Start-Up Checklist for 30MP Liquid Chiller at
end of this publication (page CL-1 to CL-8). The checklist
assures proper start-up of a unit, and provides a record of
unit condition, application requirements, system information, and operation at initial start-up.
Do not attempt to start the chiller until following checks
have been completed.

System Check
1. Check all auxiliary components, such as chilled fluid
pumps, air-handling equipment, condenser pump or other
equipment to which the chiller supplies liquid. Consult
manufacturer's instructions. Verify that any pump interlock contacts have been properly installed. If the unit has
field-installed accessories, be sure all are properly installed and wired correctly. Refer to unit wiring diagrams.
2. Use the scrolling marquee display to adjust the Cooling
Set Point.
3. Fill chilled fluid circuit with clean water (with recommended inhibitor added) or other non-corrosive fluid to
be cooled. Bleed all air out of the high points of the system. If chilled water is to be maintained at a temperature
below 40 F (4.4 C), a brine of sufficient concentration
must be used to prevent freeze-up at anticipated suction
temperatures. To ensure sufficient loop volume, see
Table 28.
4. Check tightness of all electrical connections.

Table 28 — Minimum Flow Rates and Minimum
Loop Volume (for Comfort Cooling)
UNIT SIZE
30MP015
30MP020
30MP030
30MP040
30MP045
AHRI —
N
—
V
—

EVAPORATOR

CONDENSER*

Gal./Min
22
28
43
55
64

MINIMUM EVAPORATOR
LOOP VOLUME
Gal.
L
46.2
174.9
60.9
230.5
92.4
349.7
78.4
296.7
91.6
346.7

L/s Gal./Min L/s
1.4
22
1.4
1.8
28
1.8
2.7
43
2.7
3.5
55
3.5
4.0
64
4.0
LEGEND
Air Conditioning, Heating, and Refrigeration Institute
Liters per kW
Gallons per ton

NOTES:
Gallons = V x AHRI capacity in tons.
Liters = N x AHRI capacity in kW.
APPLICATION
Normal Air Conditioning
Process Type Cooling
Low Ambient Operation

V
3
6 to 10
6 to 10

N
3.25
6.5 to 10.8
6.5 to 10.8

All refrigerant charging should be done through the ¼-in.
Schraeder connection on the liquid line. Do NOT add refrigerant charge through the low-pressure side of the system. If complete charging is required, weigh in the appropriate charge for
the circuit as shown on the unit nameplate. If partial charging is
required, operate circuit at full load and add charge until the
sight glass is clear of bubbles.

a30-4978

CAUTION
Never charge liquid into low-pressure side of system. Do
not overcharge. Overcharging results in higher discharge
pressure, possible compressor damage, and higher power
consumption. During charging or removal of refrigerant, be
sure water is continuously circulating through the cooler to
prevent freezing.
The 30MPA units (condenserless) are shipped with a nitrogen holding charge only. After chiller assembly is completed in
the field, system must be fully charged. While the unit is running at full capacity, add refrigerant until the sight glass is clear.
R-410A is the normal refrigerant.
Do not open the liquid valve until there is a charge in remainder of system. A positive pressure indicates a charge in
system. With the unit operating at full load, check liquid line
sight glass to be sure the unit is fully charged (bubbles in the
sight glass indicate the unit is not fully charged).
If there is no refrigerant vapor pressure in the system, the
entire system must be leak tested. After repairing leaks, evacuate the system before recharging.
Follow approved evacuation procedures when removing
refrigeration. Release remaining pressure to an approved evacuated cylinder.
The liquid charging method is recommended for complete
charging or when additional charge is required.

OIL SIGHTGLASS

Fig. 20 — Sight Glass Location

START-UP AND OPERATION
CAUTION
Crankcase heaters on 30MPA units are wired into the control circuit, so they are always operable as long as the main
power supply disconnect is on (closed), even if any safety
device is open. Compressor heaters must be on for 24
hours prior to the start-up of any compressor. Equipment
damage could result if heaters are not energized for at least
24 hours prior to compressor start-up.
Compressor crankcase heaters must be on for 24 hours before start-up. To energize the crankcase heaters, close the field
disconnect. Leave the compressor circuit breakers off/open.
The crankcase heaters are now energized.
NOTE: Refer to Start-Up Checklist on pages CL-1 to CL-8.

CAUTION
Be careful not to overcharge the system. Overcharging
results in higher discharge pressure, possible compressor
damage, and higher power consumption.

Actual Start-Up — Actual start-up should be done only

under supervision of a qualified refrigeration mechanic.
1. Be sure all service valves are open (30MPA units only).
2. Using the scrolling marquee display, set leaving-fluid set
point (Set PointsCOOLCSP.1). No cooling range
adjustment is necessary.
3. Start chilled fluid pump (if not configured for cooler
pump control).
4. Turn ENABLE/OFF/REMOTE CONTACT switch to
ENABLE position.
5. Allow unit to operate and confirm that everything is functioning properly. Check to see that leaving fluid temperature agrees with leaving set point (Set PointsCOOL
CSP.1) or (Set PointsCOOLCSP.2), or if reset is
used, with the control point (Run StatusVIEW
CTPT).
6. Check the cooler leaving chilled water temperature to see
that it remains well above 32 F (0° C), or the brine freezing point if the unit is a medium temperature brine unit.
7. Recheck compressor oil level (see Oil Charge section).

EVACUATION AND DEHYDRATION — Because the
30MP systems use polyolester (POE) oil, which can absorb
moisture, it is important to minimize the amount of time that
the system interior is left exposed to the atmosphere. Minimizing the exposure time of the oil to the atmosphere will minimize the amount of moisture that needs to be removed during
evacuation.
Once all of the piping connections are complete, leak test
the unit and then pull a deep dehydration vacuum. Connect the
vacuum pump to the high flow Schraeder valve in the suction
line and liquid line. For best results, it is recommended that a
vacuum of at least 500 microns (0.5 mm Hg) be obtained. Afterwards, to ensure that no moisture is present in the system,
perform a standing vacuum-rise test.
With the unit in deep vacuum (500 microns or less), isolate
the vacuum pump from the system. Observe the rate-of-rise of
the vacuum in the system. If the vacuum rises by more than
50 microns in a 30-minute time period, then continue the dehydration process. Maintain a vacuum on the system until the
standing vacuum requirement is met. This will ensure a dry
system.
By following these evacuation and dehydration procedures,
the amount of moisture present in the system will be minimized. It is required that liquid line filter driers be installed
between the condenser(s) and the expansion devices to capture
any foreign debris and provide additional moisture removal
capacity.

Check Refrigerant Charge — All 30MPW units are

shipped with a complete operating charge of R-410A and
should be under sufficient pressure to conduct a leak test after
installation. If there is no system pressure, admit nitrogen until
a pressure is observed and then proceed to test for leaks. After
leaks are repaired, the system must be dehydrated.
34

medium temperature brine unit, the cooler LCWT can go
down to 15 F (–9.4 C).

LIQUID CHARGING METHOD — Add charge to the unit
through the liquid line service valve. Never charge liquid into
the low-pressure side of the system.
1. Close liquid line ball valve (30MPA only).
2. Connect a refrigerant cylinder loosely to the high flow
Schraeder valve connection on the liquid line. Purge the
charging hose and tighten the connections.
3. Open the refrigerant cylinder valve.
4. If the system has been dehydrated and is under vacuum,
break the vacuum with refrigerant gas. For R-410A, build
up system pressure to 101 psig and 32 F (697 kPa and
0° C). Invert the refrigerant cylinder so that the liquid refrigerant will be charged.
5. a. For complete charge of 30MPW units, follow
charging by weight procedure. When charge is
nearly full, complete the process by observing the
sight glass for clear liquid flow while the unit is
operating. The use of sight glass charging is valid
only when unit is operating at full capacity.
b. For complete charge of 30MPA units or where
refrigerant cylinder cannot be weighed, follow the
condenser manufacturer’s charging procedure or
follow charging by sight glass procedure. The use
of sight glass charging is valid only when unit is
operating at full capacity.
6. a. The 30MPA condenserless units are shipped
with a nitrogen holding charge. After installation
with the field-supplied system high side, the complete system should be evacuated and charged per
the condenser manufacturer’s charging procedure
or charged until the sight glass is clear (with the
unit running at full capacity). To achieve maximum system capacity, add additional charge equal
to the difference between the condenser optimal
charge and the condenser minimum charge, which
can be obtained from the charge data provided in
the condenser installation instructions.
b. To ensure maximum performance of 30MPW
units, raise the compressor saturated discharge
temperature (SDT) to approximately 100 F
(37.8 C) by throttling the condenser water intake.
Add charge until there is approximately 9 to 12° F
(5.0 to 6.6° C) of system subcooling (SDT minus
actual temperature entering the thermostatic
expansion valve).

Table 29 — Temperature Limits for
Standard 30MP Units
TEMPERATURE LIMIT

F
140
70
95
70
40

Maximum Condenser LWT
Minimum Condenser EWT
Maximum Cooler EWT*
Maximum Cooler LWT
Minimum Cooler LWT†

C
60
21
35
21
4

LEGEND
EWT — Entering Fluid (Water) Temperature
LWT — Leaving Fluid (Water) Temperature

*For sustained operation, EWT should not exceed 85 F (29.4 C).
†Unit requires modification below this temperature.

CAUTION
Medium temperature brine duty application (below 32 F
[0° C] LCWT) for chiller normally requires factory modification. Contact your Carrier representative for applicable
LCWT range for standard water-cooled chiller in a specific
application.
VOLTAGE — ALL UNITS
Main Power Supply — Minimum and maximum acceptable
supply voltages are listed in the Installation Instructions.
Unbalanced 3-Phase Supply Voltage — Never operate a motor
where a phase imbalance between phases is greater than 2%.
To determine percent voltage imbalance:
a30-4979
max voltage deviation
from avg voltage
% Voltage Imbalance = 100 x
average voltage
The maximum voltage deviation is the largest difference
between a voltage measurement across 2 legs and the average
across all 3 legs.
Example: Supply voltage is 240-3-60.
AB = 243 v
BC = 236 v
AC = 238 v
1. Determine average voltage:

Operating Limitations
TEMPERATURES (See Table 29 for 30MP standard temperature limits).

Average voltage =
=

CAUTION

243 + 236 + 238
3
717
3

= 239
2. Determine maximum deviation from average voltage:
(AB) 243 – 239 = 4 v
(BC) 239 – 236 = 3 v
(AC) 239 – 238 = 1 v
Maximum deviation is 4 v.
3. Determine percent voltage imbalance:

Do not operate with cooler leaving chiller water (fluid)
temperature (LCWT) below 32 F (0° C) for standard units
with proper brine solution or 40 F (4.4 C) for the standard
units with fresh water, or below 15 F (–9.4 C) for units factory built for medium temperature brine.
High Cooler Leaving Chilled Water (Fluid) Temperatures
(LCWT) — During start-up with cooler the LCWT should not
be above approximately 60 F (16 C).
Low Cooler LCWT — For standard units with fresh water,
the LCWT must be no lower than 40 F (4.4 C). For standard
units with a proper brine solution, the LCWT must be no lower
than 32 F (0° C). If the unit is the factory-installed optional

% Voltage Imbalance = 100 x
= 1.7%

4
239

mounting hardware. Using new tubing as required, reconnect
compressor suction and discharge lines. Using hardware saved,
reinstall the mounting bolts and washers through the compressor feet. Using proper techniques, braze suction and discharge
lines and check for leaks. Reconnect oil equalization line.
Re-install the crankcase heater (30MPA units). Reconnect
the compressor power connections and high-pressure switch
wiring as on the old compressor. Refer to Fig. 21. Following
the installation of the new compressor, tighten all hardware to
the following specifications. (See Table 30.)

This voltage imbalance is satisfactory as it is below the
maximum allowable of 2%.
IMPORTANT: If the supply voltage phase imbalance is
more than 2%, contact your local electric utility company
immediately. Do not operate unit until imbalance condition
is corrected.
Control Circuit Power — Power for the control circuit is
supplied from the main incoming power through a factoryinstalled control power transformer (TRAN1) for all models.
Field wiring connections are made to the LVT.

Table 30 — Unit Torque Specification
FASTENER
Compressor Mounting
Bolts
Compressor Power
Connections
Compressor Ground
Terminal Connections

OPERATION SEQUENCE
The unit is started by putting the ENABLE/OFF/REMOTE
CONTACT switch in the ENABLE or REMOTE CONTACT
position. When the unit receives a call for cooling (either from
the internal control or CCN network command or remote contact closure), the unit stages up in capacity to maintain the leaving fluid set point. The first compressor starts 11/2 to 3 minutes
after the call for cooling.
For all units, if temperature reset is being used, the unit controls to a higher leaving-fluid temperature as the building load
reduces. If demand limit is used, the unit may temporarily be
unable to maintain the desired leaving-fluid temperature because of imposed power limitations.

RECOMMENDED TORQUE
7 to 10 ft-lb (9.5 to 13.5 N-m)
24 to 28 in.-lb (2.7- to 3.2 N-m)
14 to 18 in.-lb (1.6 to 2.0 N-m)

30MPW Condenser and 30MP Cooler
BRAZED-PLATE COOLER AND CONDENSER HEAT
EXCHANGER REPLACEMENT — Brazed-plate heat exchangers cannot be repaired if they develop a leak. If a leak
(refrigerant or water) develops, the heat exchanger must be
replaced. To replace a brazed plate heat exchanger:
1. Disconnect the liquid-in and liquid-out connections at the
heat exchanger.
2. Check that the replacement heat exchanger is the same as
the original heat exchanger. For the condensers, compare
part numbers on the heat exchangers. For the coolers, insulation covers the manufacturer’s part number. Make
sure the depths of the replacement and original cooler
heat exchangers are the same.
3. Recover the refrigerant from the system, and unsolder the
refrigerant-in and refrigerant-out connections.
4. Remove the four nuts holding the heat exchanger to the
brackets. Save the nuts.
5. Install the replacement heat exchanger in the unit and attach to the bracket using the four nuts removed in Step 4.
For sizes 015 and 020, torque is 7-10 ft-lb. For sizes 030045, torque is 35 to 50 ft-lb.
6. Carefully braze the refrigerant lines to the connections on
the heat exchanger. Lines should be soldered using silver
as the soldering material with a minimum of 45% silver.
Keep the temperature below 1472 F (800 C) under normal soldering conditions (no vacuum) to prevent the copper solder of the brazed plate heat exchanger from changing its structure. Failure to do so can result in internal
or external leakage at the connections which cannot be
repaired.
7. For coolers, ensure that the original size tubing is used
(1/2-in. for sizes 015 and 020 and 5/8-in. for sizes 030-045)
between the TXV and the cooler. The TXV must be located within 1 ft of the heat exchanger, with no bends between the TXV outlet and the cooler inlet.
8. Reconnect the water/brine lines.
9. Dehydrate and recharge the unit. Check for leaks.
BRAZED-PLATE COOLER AND CONDENSER HEAT
EXCHANGER CLEANING — Brazed-plate heat exchangers must be cleaned chemically. A professional cleaning service skilled in chemical cleaning should be used. Use a weak
acid (5% phosphoric acid, or if the heat exchanger is cleaned
frequently, 5% oxalic acid). Pump the cleaning solution
through the exchanger, preferably in a backflush mode. After
cleaning, rinse with large amounts of fresh water to dispose of
all the acid. Cleaning materials must be disposed of properly.

SERVICE
WARNING
Electrical shock can cause personal injury and death. Shut
off all power to this equipment during service. There may
be more than one disconnect switch. Tag all disconnect
locations to alert others not to restore power until work is
completed.

Electronic Components
CONTROL COMPONENTS — Unit uses an advanced electronic control system that normally does not require service.
For details on controls refer to Operating Data section.
Access to the controls is through a hinged panel. Inner panels are secured in place and should not be removed unless all
power to the chiller is off.

Compressor Replacement — All models contain

scroll compressors and have two or three compressors. A compressor is most easily removed from the side of the unit or
above, depending on where clearance space was allowed during unit installation. See Fig. 21.
Remove the junction box cover bolts and disconnect the
compressor power and crankcase heater connections (30MPA
only). Remove the cable from the compressor junction box.
Remove the connections from the high-pressure switch. Remove the crankcase heater. Knock the same holes out of the
new compressor junction box and install the cable connectors
from the old compressor.
The compressors are bolted to rails, which are in turn bolted
to the unit basepan for all sizes. Remove the 4 bolts holding the
compressor to the rail on the basepan. Save the mounting hardware for use with the new compressor. Carefully cut the compressor suction and discharge lines with a tubing cutter as close
to the compressor as feasible. Remove high-pressure switch
and pressure transducer(s) if required for compressor removal.
Lift one corner of the compressor at a time and remove all the
steel spacers. Remove the old compressor from the unit.
Slide the new compressor in place on the rails. Lifting one
side of the compressor at a time, replace all of the compressor
36

The strainers in front of the water/brine inlets of the heat
exchangers should be cleaned periodically, depending on condition of the chiller water/brine.

Do not reuse oil that has been drained out, or oil that has
been exposed to atmosphere.

Oil Charge

FILTER DRIER — The function of the filter drier is to maintain a clean, dry system. The moisture indicator (described
below) indicates any need to change the filter drier. The filter
drier is a sealed-type drier. When the drier needs to be
changed, the entire filter drier must be replaced.
MOISTURE-LIQUID INDICATOR — The indicator is located
immediately ahead of the TXV to provide an indication of the
refrigerant moisture content. It also provides a sight glass for
refrigerant liquid. Clear flow of liquid refrigerant (at full unit
loading) indicates sufficient charge in the system. Bubbles in the
sight glass (at full unit loading) indicate an undercharged system
or the presence of noncondensables. Moisture in the system,
measured in parts per million (ppm), changes the color of the
indicator as follows:
Green (safe) —Moisture is below 75 ppm
Yellow-Green (caution) — 75 to 150 ppm
Yellow (wet) — above 150 ppm
The unit must be in operation at least 12 hours before the
moisture indicator gives an accurate reading, and must be in
contact with liquid refrigerant. At the first sign of moisture in
the system, change the corresponding filter drier.
THERMOSTATIC EXPANSION VALVE (TXV) — The
TXV controls the flow of liquid refrigerant to the cooler by
maintaining constant superheat of vapor leaving the cooler.
The valve(s) is activated by a temperature-sensing bulb(s)
strapped to the suction line(s).
The valve(s) is factory-set to maintain between 8° and 10° F
(4.4° and 5.6° C) of superheat leaving the cooler. Check the
superheat during operation after conditions have stabilized. If
necessary, adjust the superheat to prevent refrigerant floodback
to the compressor.

Check Refrigerant Feed Components

CAUTION
The compressor in a Puron® refigerant (R-410A) system
uses a polyol ester (POE) oil. This is extremely hygroscopic, meaning it absorbs water readily. POE oils can
absorb 15 times as much water as other oils designed for
HCFC and CFC refrigerants. Take all necessary precautions to avoid exposure of the oil to the atmosphere. Failure
to do so could result in possible equipment damage.
Puron refrigerant systems use a polyol ester (POE) oil. Use
only Carrier approved compressor oil. Oil should be visible in
compressor oil sight glass. An acceptable oil level is from 1/8 to
3/ of sight glass. All compressors must be off when checking
8
oil level. Recommended oil level adjustment method is as
follows:
ADD OIL — Recover charge from the unit. Add oil to suction
line Schrader valve on tandem compressors sets and the compressor Schrader on the trios. (See Fig. 21.) When oil can be
seen at the bottom of the sight glass, add oil in 5 oz increments
which is approximately 1/8 in oil level. Run all compressors for
20 minutes then shut off to check oil level. Repeat procedure
until acceptable oil level is present.
NOTE: Use only Carrier approved compressor oil. Approved
sources are:
Totaline . . . . . . . . . . . . . . . . . . . . . . 3MAF POE, P903-1601
Mobil. . . . . . . . . . . . . . . . . . . . . . . . . . . EAL Arctic 32-3MA
Uniqema . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . RL32-3MAF

HPS

CWFS
DPT
EWT
HPS
LWT
RGT
SPT

—
—
—
—
—
—
—

DPT

LEGEND
Chilled Water Flow Switch
Discharge Pressure Transducer
Entering Water Thermistor
High Pressure Switch
Leaving Water Thermistor
Return Gas Thermistor (Optional)
Suction Pressure Transducer

RGT
SPT
EWT
(HIDDEN)

CWFS

LWT
a30-5049

Fig. 21 — Compressor Location — 30MP015-045 Units (30MPW045 Unit Shown)

COOLER FREEZE-UP PROTECTION

MINIMUM LOAD VALVE — On units equipped with the
factory-installed hot gas bypass option, a solenoid valve and
discharge bypass valve (minimum load valve) are located
between the discharge line and the cooler entering-refrigerant
line. The MBB cycles the solenoid to perform minimum load
valve function and the discharge bypass valve modulates to the
suction pressure set point of the valve. The bypass valve has an
adjustable opening setting between 95 to 115 psig (655 to
793 kPa). The factory setting is 105 psig (724 kPa).
The amount of capacity reduction achieved by the minimum load valve is not adjustable. The total unit capacity with
the minimum load valve is shown in Table 19.
PRESSURE RELIEF DEVICES — All units have one pressure relief device per circuit located in the liquid line which relieves at 210 F (100 C).
The 30MPW unit does not have a condenser pressure relief
valve, because the brazed-plate condenser is not considered a
pressure vessel, as defined in ANSI/ASHRAE 15 (American
National Standards Institute/American Society of Heating,
Refrigerating, and Air Conditioning Engineers) safety code
requirements.
For 30MPA condenserless units, pressure relief devices designed to relieve at the pressure determined in local codes,
must be field-supplied and installed in the discharge line piping
in accordance with ANSI/ASHRAE 15 safety code requirements. Additional pressure relief valves, properly selected,
must be field-supplied and installed to protect high side equipment and may be required by applicable codes.
Most codes require that a relief valve be vented directly to
the outdoors. The vent line must not be smaller than the relief
valve outlet. Consult ANSI/ASHRAE 15 for detailed information concerning layout and sizing of relief vent lines.

WARNING
On medium temperature brine units, the anti-freeze solution must be properly mixed to prevent freezing at a temperature of at least 15 F (8.3 C) below the leaving-fluid
temperature set point. Failure to provide the proper antifreeze solution mixture is considered abuse and may impair
or otherwise negatively impact the Carrier warranty.
The main base board (MBB) monitors cooler leaving fluid
temperature at all times. The MBB will rapidly remove stages
of capacity as necessary to prevent freezing conditions due to
the rapid loss of load or low cooler fluid flow.
When the cooler is exposed to lower temperatures (40 F
[4.4 C] or below), freeze-up protection is required using inhibited ethylene or propylene glycol.

Thermistors — Electronic control uses up to five 5 k
thermistors to sense temperatures used to control operation of
the chiller. Thermistors EWT, LWT, RGTA, CNDE, CNDL,
and OAT are identical in their temperature and voltage drop
performance. The SPT space temperature thermistor has a
10 k input channel and it has a different set of temperature vs.
resistance and voltage drop performance. Resistance at various
temperatures are listed in Tables 32-35. For dual chiller operation, a dual chiller sensor is required which is a 5 k
thermistor.
REPLACING THERMISTORS (EWT, LWT, RGT, CNDE,
CNDL) — Add a small amount of thermal conductive grease
to the thermistor well and end of probe. For all probes, tighten
the retaining nut ¼ turn past finger tight. See Fig. 22.
THERMISTOR/TEMPERATURE SENSOR CHECK — A
high quality digital volt-ohmmeter is required to perform this
check.
1. Connect the digital voltmeter across the appropriate themistor terminals at the J8 terminal strip on the main base
board (see Fig. 23).
2. Using the voltage reading obtained, read the sensor temperature from Tables 32-35.
3. To check thermistor accuracy, measure temperature at
probe location with an accurate thermocouple-type temperature measuring instrument. Insulate thermocouple to
avoid ambient temperatures from influencing reading.
Temperature measured by thermocouple and temperature
determined from thermistor voltage reading should be
close, ± 5° F (3° C) if care was taken in applying thermocouple and taking readings.
If a more accurate check is required, unit must be shut down
and thermistor removed and checked at a known temperature
(freezing point or boiling point of water) using either voltage
drop measured across thermistor at the J8 terminal, by determining the resistance with chiller shut down and thermistor
disconnected from J8. Compare the values determined with the
value read by the control in the Temperatures mode using the
scrolling marquee display.

Check Unit Safeties
HIGH-PRESSURE SWITCH — A high-pressure switch is
provided to protect each compressor and refrigeration system
from unsafe high pressure conditions. See Table 31 for highpressure switch settings.
The high-pressure switch is mounted in the discharge line of
each circuit. If an unsafe, high-pressure condition should exist,
the switch opens and shuts off the affected circuit. The CSB
(current sensing board) senses the compressor feedback signal
and generates an appropriate alarm. The MBB prevents the circuit from restarting until the alert condition is reset. The switch
should open at the pressure corresponding to the appropriate
switch setting as shown in Table 31.
Table 31 — Factory Settings, High-Pressure
Switch (Fixed)
UNIT
30MP015-045

CUTOUT
Psig
kPa
650
4482

CUT-IN
Psig
500

kPa
3447

Clear the alarm using the scrolling marquee display. The
unit should restart after the compressor anti-short-cycle delay,
built into the unit control module, expires.
PRESSURE TRANSDUCERS — Each unit is equipped with
a suction and discharge pressure transducer. These inputs to the
MBB are not only used to monitor the status of the unit, but to
also maintain operation of the chiller within the compressor
manufacturer's specified limits. The input to the MBB from the
suction pressure transducer is also used to protect the compressor from operating at low pressure conditions. If suction return
gas thermistors are installed, then additional low superheat
conditions are detected. In some cases, the unit may not be able
to run at full capacity. The control module will automatically
reduce the capacity of a circuit as needed to maintain specified
maximum/minimum operating pressures.

Pressure Transducers — The suction and discharge

transducers are different part numbers and can be distinguished
by the color of the transducer body, suction (yellow) and discharge (red). No pressure transducer calibration is required.
The transducers operate on a 5 vdc supply, which is generated
by the main base board (MBB). See Fig. 23 for transducer connections to the J8 connector on the MBB.
TROUBLESHOOTING — If a transducer is suspected of being faulty, first check supply voltage to the transducer. Supply
voltage should be 5 vdc ± 0.2 v. If supply voltage is correct,
compare pressure reading displayed on the scrolling marquee
display module against pressure shown on a calibrated pressure

4. Wrong pump motor rotation. Pump must rotate clockwise
when viewed from motor end of pump.

gauge. Pressure readings should be within ± 15 psig. If the
two readings are not reasonably close, replace the pressure
transducer.

Chilled Water Flow Switch — A factory-installed

flow switch is installed in the leaving fluid piping for all units.
This is a thermal-dispersion flow switch with no field adjustments. The switch is set for approximately 0.5 ft/sec of flow.
The sensor tip houses two thermistors and a heater element.
One thermistor is located in the sensor tip, closest to the flowing fluid. See Fig. 24. This thermistor is used to detect changes
in the flow velocity of the liquid. The second thermistor is
bonded to the cylindrical wall and is affected only by changes
in the temperature of the liquid. The thermistors are positioned
to be in close contact with the wall of the sensor probe and, at
the same time, to be kept separated from each other within the
confines of the probe.
In order to sense flow, it is necessary to heat one of the
thermistors in the probe. When power is applied, the tip of the
probe is heated. As the fluid starts to flow, heat will be carried
away from the sensor tip. Cooling of the first thermistor is a
function of how fast heat is conducted away by the flowing
liquid.
The difference in temperature between the two thermistors
provides a measurement of fluid velocity past the sensor probe.
When fluid velocity is high, more heat will be carried away
from the heated thermistor and the temperature differential will
be small. As fluid velocity decreases, less heat will be taken
from the heated thermistor and there will be an increase in temperature differential.
When unit flow rate is above the minimum flow rate, then
the output is switched on, sending 24 vac to the MBB to prove
flow has been established.
For recommended maintenance, check the sensor tip for
build-up every 6 months. Clean the tip with a soft cloth. If
necessary, build-up (e.g., lime) can be removed with a common
vinegar cleansing agent.
The flow sensor cable is provided with (3) LEDs that indicate if 24 vac power is present and also status of the switch
contacts. The LEDs are as follows:
• Green LED ON – 24 vac present
• One Yellow LED ON – Flow sensor switch OPEN
• Two Yellow LED ON – Flow sensor switch CLOSED
If nuisance trips of the sensor are occurring, follow the
steps below to correct the situation:
1. Check to confirm that the field-installed strainer is clean.
Use the blow-down valve provided or remove the screen
and clean it. For the case of VFD controlled pumps, ensure that the minimum speed setting has not been
changed.
2. Measure the pressure drop across the cooler and compare
this to the system requirements.
3. Verify that cable connections at the switch and at the terminal block are secure.

2
3
4
5
6
7
8

BASE
BOARD

9
10
11
12

13
14
15
16
17
18
19
20
21
22
23
24
25
26

ACCSY
DPT
EWT
LWT
LVT
OAT
RGT
SEN
SPT

—
—
—
—
—
—
—
—
—

CONDENSER EWT
ACCESSORY

1
2

CONDENSER LWT
ACCESSORY

3
4
5
6
1

LVT

J12

T55

BLU

VIO

RED

SEN

2
OAT ACCESSORY OR
DUAL CHILLER LWT

RGTA
ACCESSORY

3
4
1
2
3
4

COOLER ENTERING
FLUID TEMP

RED
BLK

COOLER LEAVING
FLUID TEMP

RED
BLK

1
2
3
4
5
6
7
8
9
10
11
12

RED
GRN
BLK
RED
GRN
BLK

B
C
A

DPTA

B
C

SPTA

a30-5043

LEGEND
Accessory
Discharge Pressure Transducer
Entering Water Temperature
Leaving Water Temperature Sensor
Low Voltage Terminal
Outdoor Air Temperature Sensor
Return Gas Temperature Sensor
Sensor Terminal Block
Space Temperature Sensor

Fig. 23 — Thermistor Connections to
Main Base Board, J8 Connector

a30-499
NOTE: Dimensions are in millimeters.

Fig. 24— Chilled Water Flow Switch

5/8 in. HEX

1/4-18 NPT

6" MINIMUM
CLEARANCE FOR
THERMISTOR
REMOVAL

Fig. 22 — Thermistor Well
39

T-55
ACCSY

Table 32 — 5K Thermistor Temperatures (°F) vs. Resistance/Voltage Drop
(Voltage Drop for EWT, LWT, RGT, CNDE, CNDL, Dual Chiller, and OAT)
TEMP
(F)
–25
–24
–23
–22
–21
–20
–19
–18
–17
–16
–15
–14
–13
–12
–11
–10
–9
–8
–7
–6
–5
–4
–3
–2
–1
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58

VOLTAGE
DROP
(V)
3.699
3.689
3.679
3.668
3.658
3.647
3.636
3.624
3.613
3.601
3.588
3.576
3.563
3.550
3.536
3.523
3.509
3.494
3.480
3.465
3.450
3.434
3.418
3.402
3.386
3.369
3.352
3.335
3.317
3.299
3.281
3.262
3.243
3.224
3.205
3.185
3.165
3.145
3.124
3.103
3.082
3.060
3.038
3.016
2.994
2.972
2.949
2.926
2.903
2.879
2.856
2.832
2.808
2.784
2.759
2.735
2.710
2.685
2.660
2.634
2.609
2.583
2.558
2.532
2.506
2.480
2.454
2.428
2.402
2.376
2.349
2.323
2.296
2.270
2.244
2.217
2.191
2.165
2.138
2.112
2.086
2.060
2.034
2.008

RESISTANCE
(Ohms)

TEMP
(F)

98,010
94,707
91,522
88,449
85,486
82,627
79,871
77,212
74,648
72,175
69,790
67,490
65,272
63,133
61,070
59,081
57,162
55,311
53,526
51,804
50,143
48,541
46,996
45,505
44,066
42,679
41,339
40,047
38,800
37,596
36,435
35,313
34,231
33,185
32,176
31,202
30,260
29,351
28,473
27,624
26,804
26,011
25,245
24,505
23,789
23,096
22,427
21,779
21,153
20,547
19,960
19,393
18,843
18,311
17,796
17,297
16,814
16,346
15,892
15,453
15,027
14,614
14,214
13,826
13,449
13,084
12,730
12,387
12,053
11,730
11,416
11,112
10,816
10,529
10,250
9,979
9,717
9,461
9,213
8,973
8,739
8,511
8,291
8,076

59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142

VOLTAGE
DROP
(V)
1.982
1.956
1.930
1.905
1.879
1.854
1.829
1.804
1.779
1.754
1.729
1.705
1.681
1.656
1.632
1.609
1.585
1.562
1.538
1.516
1.493
1.470
1.448
1.426
1.404
1.382
1.361
1.340
1.319
1.298
1.278
1.257
1.237
1.217
1.198
1.179
1.160
1.141
1.122
1.104
1.086
1.068
1.051
1.033
1.016
0.999
0.983
0.966
0.950
0.934
0.918
0.903
0.888
0.873
0.858
0.843
0.829
0.815
0.801
0.787
0.774
0.761
0.748
0.735
0.723
0.710
0.698
0.686
0.674
0.663
0.651
0.640
0.629
0.618
0.608
0.597
0.587
0.577
0.567
0.557
0.548
0.538
0.529
0.520

RESISTANCE
(Ohms)

TEMP
(F)

7,686
7,665
7,468
7,277
7,091
6,911
6,735
6,564
6,399
6,238
6,081
5,929
5,781
5,637
5,497
5,361
5,229
5,101
4,976
4,855
4,737
4,622
4,511
4,403
4,298
4,196
4,096
4,000
3,906
3,814
3,726
3,640
3,556
3,474
3,395
3,318
3,243
3,170
3,099
3,031
2,964
2,898
2,835
2,773
2,713
2,655
2,597
2,542
2,488
2,436
2,385
2,335
2,286
2,239
2,192
2,147
2,103
2,060
2,018
1,977
1,937
1,898
1,860
1,822
1,786
1,750
1,715
1,680
1,647
1,614
1,582
1,550
1,519
1,489
1,459
1,430
1,401
1,373
1,345
1,318
1,291
1,265
1,240
1,214

143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225

VOLTAGE
DROP
(V)
0.511
0.502
0.494
0.485
0.477
0.469
0.461
0.453
0.445
0.438
0.430
0.423
0.416
0.408
0.402
0.395
0.388
0.381
0.375
0.369
0.362
0.356
0.350
0.344
0.339
0.333
0.327
0.322
0.317
0.311
0.306
0.301
0.296
0.291
0.286
0.282
0.277
0.272
0.268
0.264
0.259
0.255
0.251
0.247
0.243
0.239
0.235
0.231
0.228
0.224
0.220
0.217
0.213
0.210
0.206
0.203
0.200
0.197
0.194
0.191
0.188
0.185
0.182
0.179
0.176
0.173
0.171
0.168
0.165
0.163
0.160
0.158
0.155
0.153
0.151
0.148
0.146
0.144
0.142
0.140
0.138
0.135
0.133

RESISTANCE
(Ohms)
1,190
1,165
1,141
1,118
1,095
1,072
1,050
1,029
1,007
986
965
945
925
906
887
868
850
832
815
798
782
765
750
734
719
705
690
677
663
650
638
626
614
602
591
581
570
561
551
542
533
524
516
508
501
494
487
480
473
467
461
456
450
445
439
434
429
424
419
415
410
405
401
396
391
386
382
377
372
367
361
356
350
344
338
332
325
318
311
304
297
289
282

Table 33 — 5K Thermistor Temperatures (°C) vs. Resistance/Voltage Drop
(Voltage Drop for EWT, LWT, RGT, CNDE, CNDL, Dual Chiller, and OAT)
TEMP
(C)
–32
–31
–30
–29
–28
–27
–26
–25
–24
–23
–22
–21
–20
–19
–18
–17
–16
–15
–14
–13
–12
–11
–10
–9
–8
–7
–6
–5
–4
–3
–2
–1
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14

VOLTAGE
DROP
(V)
3.705
3.687
3.668
3.649
3.629
3.608
3.586
3.563
3.539
3.514
3.489
3.462
3.434
3.406
3.376
3.345
3.313
3.281
3.247
3.212
3.177
3.140
3.103
3.065
3.025
2.985
2.945
2.903
2.860
2.817
2.774
2.730
2.685
2.639
2.593
2.547
2.500
2.454
2.407
2.360
2.312
2.265
2.217
2.170
2.123
2.076
2.029

RESISTANCE
(Ohms)

TEMP
(C)

100,260
94,165
88,480
83,170
78,125
73,580
69,250
65,205
61,420
57,875
54,555
51,450
48,536
45,807
43,247
40,845
38,592
38,476
34,489
32,621
30,866
29,216
27,633
26,202
24,827
23,532
22,313
21,163
20,079
19,058
18,094
17,184
16,325
15,515
14,749
14,026
13,342
12,696
12,085
11,506
10,959
10,441
9,949
9,485
9,044
8,627
8,231

15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61

VOLTAGE
DROP
(V)
1.982
1.935
1.889
1.844
1.799
1.754
1.710
1.666
1.623
1.580
1.538
1.497
1.457
1.417
1.378
1.340
1.302
1.265
1.229
1.194
1.160
1.126
1.093
1.061
1.030
0.999
0.969
0.940
0.912
0.885
0.858
0.832
0.807
0.782
0.758
0.735
0.713
0.691
0.669
0.649
0.629
0.610
0.591
0.573
0.555
0.538
0.522

RESISTANCE
(Ohms)

TEMP
(C)

7,855
7,499
7,161
6,840
6,536
6,246
5,971
5,710
5,461
5,225
5,000
4,786
4,583
4,389
4,204
4,028
3,861
3,701
3,549
3,404
3,266
3,134
3,008
2,888
2,773
2,663
2,559
2,459
2,363
2,272
2,184
2,101
2,021
1,944
1,871
1,801
1,734
1,670
1,609
1,550
1,493
1,439
1,387
1,337
1,290
1,244
1,200

62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107

VOLTAGE
DROP
(V)
0.506
0.490
0.475
0.461
0.447
0.433
0.420
0.407
0.395
0.383
0.371
0.360
0.349
0.339
0.329
0.319
0.309
0.300
0.291
0.283
0.274
0.266
0.258
0.251
0.244
0.237
0.230
0.223
0.217
0.211
0.204
0.199
0.193
0.188
0.182
0.177
0.172
0.168
0.163
0.158
0.154
0.150
0.146
0.142
0.138
0.134

RESISTANCE
(Ohms)
1,158
1,118
1,079
1,041
1,006
971
938
906
876
836
805
775
747
719
693
669
645
623
602
583
564
547
531
516
502
489
477
466
456
446
436
427
419
410
402
393
385
376
367
357
346
335
324
312
299
285

Table 34 — 10K Thermistor Temperature (°F) vs. Resistance/Voltage Drop
(For SPT)
TEMP
(F)
–25
–24
–23
–22
–21
–20
–19
–18
–17
–16
–15
–14
–13
–12
–11
–10
–9
–8
–7
–6
–5
–4
–3
–2
–1
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60

VOLTAGE
DROP
(V)
4.758
4.750
4.741
4.733
4.724
4.715
4.705
4.696
4.686
4.676
4.665
4.655
4.644
4.633
4.621
4.609
4.597
4.585
4.572
4.560
4.546
4.533
4.519
4.505
4.490
4.476
4.461
4.445
4.429
4.413
4.397
4.380
4.363
4.346
4.328
4.310
4.292
4.273
4.254
4.235
4.215
4.195
4.174
4.153
4.132
4.111
4.089
4.067
4.044
4.021
3.998
3.975
3.951
3.927
3.903
3.878
3.853
3.828
3.802
3.776
3.750
3.723
3.697
3.670
3.654
3.615
3.587
3.559
3.531
3.503
3.474
3.445
3.416
3.387
3.357
3.328
3.298
3.268
3.238
3.208
3.178
3.147
3.117
3.086
3.056
3.025

RESISTANCE
(Ohms)

TEMP
(F)

196,453
189,692
183,300
177,000
171,079
165,238
159,717
154,344
149,194
144,250
139,443
134,891
130,402
126,183
122,018
118,076
114,236
110,549
107,006
103,558
100,287
97,060
94,020
91,019
88,171
85,396
82,729
80,162
77,662
75,286
72,940
70,727
68,542
66,465
64,439
62,491
60,612
58,781
57,039
55,319
53,693
52,086
50,557
49,065
47,627
46,240
44,888
43,598
42,324
41,118
39,926
38,790
37,681
36,610
35,577
34,569
33,606
32,654
31,752
30,860
30,009
29,177
28,373
27,597
26,838
26,113
25,396
24,715
24,042
23,399
22,770
22,161
21,573
20,998
20,447
19,903
19,386
18,874
18,384
17,904
17,441
16,991
16,552
16,131
15,714
15,317

61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146

VOLTAGE
DROP
(V)
2.994
2.963
2.932
2.901
2.870
2.839
2.808
2.777
2.746
2.715
2.684
2.653
2.622
2.592
2.561
2.530
2.500
2.470
2.439
2.409
2.379
2.349
2.319
2.290
2.260
2.231
2.202
2.173
2.144
2.115
2.087
2.059
2.030
2.003
1.975
1.948
1.921
1.894
1.867
1.841
1.815
1.789
1.763
1.738
1.713
1.688
1.663
1.639
1.615
1.591
1.567
1.544
1.521
1.498
1.475
1.453
1.431
1.409
1.387
1.366
1.345
1.324
1.304
1.284
1.264
1.244
1.225
1.206
1.187
1.168
1.150
1.132
1.114
1.096
1.079
1.062
1.045
1.028
1.012
0.996
0.980
0.965
0.949
0.934
0.919
0.905

RESISTANCE
(Ohms)

TEMP
(F)

14,925
14,549
14,180
13,824
13,478
13,139
12,814
12,493
12,187
11,884
11,593
11,308
11,031
10,764
10,501
10,249
10,000
9,762
9,526
9,300
9,078
8,862
8,653
8,448
8,251
8,056
7,869
7,685
7,507
7,333
7,165
6,999
6,838
6,683
6,530
6,383
6,238
6,098
5,961
5,827
5,698
5,571
5,449
5,327
5,210
5,095
4,984
4,876
4,769
4,666
4,564
4,467
4,370
4,277
4,185
4,096
4,008
3,923
3,840
3,759
3,681
3,603
3,529
3,455
3,383
3,313
3,244
3,178
3,112
3,049
2,986
2,926
2,866
2,809
2,752
2,697
2,643
2,590
2,539
2,488
2,439
2,391
2,343
2,297
2,253
2,209

147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225

VOLTAGE
DROP
(V)
0.890
0.876
0.862
0.848
0.835
0.821
0.808
0.795
0.782
0.770
0.758
0.745
0.733
0.722
0.710
0.699
0.687
0.676
0.666
0.655
0.645
0.634
0.624
0.614
0.604
0.595
0.585
0.576
0.567
0.558
0.549
0.540
0.532
0.523
0.515
0.507
0.499
0.491
0.483
0.476
0.468
0.461
0.454
0.447
0.440
0.433
0.426
0.419
0.413
0.407
0.400
0.394
0.388
0.382
0.376
0.370
0.365
0.359
0.354
0.349
0.343
0.338
0.333
0.328
0.323
0.318
0.314
0.309
0.305
0.300
0.296
0.292
0.288
0.284
0.279
0.275
0.272
0.268
0.264

RESISTANCE
(Ohms)
2,166
2,124
2,083
2,043
2,003
1,966
1,928
1,891
1,855
1,820
1,786
1,752
1,719
1,687
1,656
1,625
1,594
1,565
1,536
1,508
1,480
1,453
1,426
1,400
1,375
1,350
1,326
1,302
1,278
1,255
1,233
1,211
1,190
1,169
1,148
1,128
1,108
1,089
1,070
1,052
1,033
1,016
998
981
964
947
931
915
900
885
870
855
841
827
814
800
787
774
762
749
737
725
714
702
691
680
670
659
649
639
629
620
610
601
592
583
574
566
557

Table 35 — 10K Thermistor Temperature (°C) vs. Resistance/Voltage Drop
(For SPT)
TEMP
(C)
–32
–31
–30
–29
–28
–27
–26
–25
–24
–23
–22
–21
–20
–19
–18
–17
–16
–15
–14
–13
–12
–11
–10
–9
–8
–7
–6
–5
–4
–3
–2
–1
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14

VOLTAGE
DROP
(V)
4.762
4.748
4.733
4.716
4.700
4.682
4.663
4.644
4.624
4.602
4.580
4.557
4.533
4.508
4.482
4.455
4.426
4.397
4.367
4.335
4.303
4.269
4.235
4.199
4.162
4.124
4.085
4.044
4.003
3.961
3.917
3.873
3.828
3.781
3.734
3.686
3.637
3.587
3.537
3.485
3.433
3.381
3.328
3.274
3.220
3.165
3.111

RESISTANCE
(Ohms)

TEMP
(C)

200,510
188,340
177,000
166,342
156,404
147,134
138,482
130,402
122,807
115,710
109,075
102,868
97,060
91,588
86,463
81,662
77,162
72,940
68,957
65,219
61,711
58,415
55,319
52,392
49,640
47,052
44,617
42,324
40,153
38,109
36,182
34,367
32,654
31,030
29,498
28,052
26,686
25,396
24,171
23,013
21,918
20,883
19,903
18,972
18,090
17,255
16,464

15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61

VOLTAGE
DROP
(V)
3.056
3.000
2.944
2.889
2.833
2.777
2.721
2.666
2.610
2.555
2.500
2.445
2.391
2.337
2.284
2.231
2.178
2.127
2.075
2.025
1.975
1.926
1.878
1.830
1.784
1.738
1.692
1.648
1.605
1.562
1.521
1.480
1.439
1.400
1.362
1.324
1.288
1.252
1.217
1.183
1.150
1.117
1.086
1.055
1.025
0.996
0.968

RESISTANCE
(Ohms)

TEMP
(C)

15,714
15,000
14,323
13,681
13,071
12,493
11,942
11,418
10,921
10,449
10,000
9,571
9,164
8,776
8,407
8,056
7,720
7,401
7,096
6,806
6,530
6,266
6,014
5,774
5,546
5,327
5,117
4,918
4,727
4,544
4,370
4,203
4,042
3,889
3,743
3,603
3,469
3,340
3,217
3,099
2,986
2,878
2,774
2,675
2,579
2,488
2,400

62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107

VOLTAGE
DROP
(V)
0.940
0.913
0.887
0.862
0.837
0.813
0.790
0.767
0.745
0.724
0.703
0.683
0.663
0.645
0.626
0.608
0.591
0.574
0.558
0.542
0.527
0.512
0.497
0.483
0.470
0.457
0.444
0.431
0.419
0.408
0.396
0.386
0.375
0.365
0.355
0.345
0.336
0.327
0.318
0.310
0.302
0.294
0.287
0.279
0.272
0.265

RESISTANCE
(Ohms)
2,315
2,235
2,157
2,083
2,011
1,943
1,876
1,813
1,752
1,693
1,637
1,582
1,530
1,480
1,431
1,385
1,340
1,297
1,255
1,215
1,177
1,140
1,104
1,070
1,037
1,005
974
944
915
889
861
836
811
787
764
742
721
700
680
661
643
626
609
592
576
561

Strainer — Periodic cleaning of the required field-installed

strainer is required. Pressure drop across strainer in excess of
3 psi (21 kPa) indicates the need for cleaning. Normal (clean)
pressure drop is approximately 1 psi (6.9 kPa). Open the
blowdown valve to clean the strainer. If required, shut the chiller down and remove the strainer screen to clean. When strainer
has been cleaned, enter ‘YES’ for Strainer Maintenance Done
(Run StatusPMS.T.MN.

Replacing Defective Modules — The Comfort-

1. Check that all power to unit is off. Carefully disconnect
all wires from the defective module by unplugging its
connectors.
2. Remove the defective module by removing its mounting
screws with a Phillips screwdriver, and removing the
module from the control box. Save the screws later use.
3. Verify that the instance jumper (MBB) or address switches (all other modules) exactly match the settings of the
defective module.
NOTE: Handle boards by mounting standoffs only to
avoid electrostatic discharge.
4. Package the defective module in the carton of the new
module for return to Carrier.
5. Mount the new module in the unit’s control box using a
Phillips screwdriver and the screws saved in Step 2.

Link™ replacement modules are shown in Table 36. If the main
base board (MBB) has been replaced, verify that all configuration data is correct. Follow the Configuration mode table and
verify that all items under sub-modes UNIT, OPT1 and OPT2
are correct. Any additional field-installed accessories or options (RSET, SLCT sub-modes) should also be verified as well
as any specific time and maintenance schedules.
Refer to the Start-Up Checklist for 30MP Liquid Chillers
(completed at time of original start-up) found in the job folder.
This information is needed later in this procedure. If the checklist does not exist, fill out the current information in the Configuration mode on a new checklist. Tailor the various options and
configurations as needed for this particular installation.

UNIT ENABLE-OFF-REMOTE CONTACT SWITCH IS
OFF — When the switch is OFF, the unit will stop immediately. Place the switch in the ENABLE position for local switch
control or in the REMOTE CONTACT position for control
through remote contact closure.
CHILLED FLUID PROOF-OF-FLOW SWITCH OPEN —
After the problem causing the loss of flow has been corrected,
reset is manual by resetting the alarm with the scrolling
marquee.
OPEN 24-V CONTROL CIRCUIT BREAKER(S) — Determine the cause of the failure and correct. Reset circuit breaker(s). Restart is automatic after MBB start-up cycle is complete.
COOLING LOAD SATISFIED — Unit shuts down when
cooling load has been satisfied. Unit restarts when required to
satisfy leaving fluid temperature set point.
THERMISTOR FAILURE — If a thermistor fails in either an
open or shorted condition, the unit will be shut down. Replace
EWT, or LWT as required. Unit restarts automatically, but must
be reset manually by resetting the alarm with the scrolling
marquee.

6. Reinstall all module connectors. For accessory Navigator™ device replacement, make sure the plug is installed
at TB3 in the LEN connector.
7. Carefully check all wiring connections before restoring
power.
8. Verify the ENABLE/OFF/REMOTE CONTACT switch
is in the OFF position.
9. Restore control power. Verify that all module red LEDs
blink in unison. Verify that all green LEDs are blinking
and that the scrolling marquee or Navigator™ display is
communicating correctly.
10. Verify all configuration information, settings, set points
and schedules. Return the ENABLE/OFF/REMOTE
CONTACT switch to its previous position.
Table 36 — Replacement Modules
MODULE
Main Base Board (MBB)
Scrolling Marquee Display
Energy Management Module (EMM)
Navigator Display

REPLACEMENT
PART NO.
(with Software)
30MP500346
HK50AA031
30GT515218
HK50AA033

CAUTION
If unit stoppage occurs more than once as a result of any of
the safety devices listed, determine and correct cause
before attempting another restart.

MAINTENANCE
Recommended Maintenance Schedule — The following are only recommended guidelines. Jobsite conditions
may dictate that maintenance schedule is performed more often
than recommended.
Routine:
Every month:
• Check moisture indicating sight glass for possible refrigerant loss and presence of moisture.
Every 3 months (for all machines):
• Check refrigerant charge.
• Check all refrigerant joints and valves for refrigerant
leaks, repair as necessary.
• Check chilled water flow switch operation.
• Check compressor oil level.
Every 12 months (for all machines):
• Check all electrical connections, tighten as necessary.
• Inspect all contactors and relays, replace as necessary.
• Check accuracy of thermistors, replace if greater than
± 2° F (1.2° C) variance from calibrated thermometer.
• Check to be sure that the proper concentration of antifreeze is present in the chilled water loop, if applicable.
• Verify that the chilled water loop is properly treated.
• Check refrigerant filter driers for excessive pressure
drop, replace as necessary.
• Check chilled water and condenser strainers, clean as
necessary.
• Perform Service Test to confirm operation of all
components.
• Check for excessive cooler approach (Leaving Chilled
Water Temperature — Saturated Suction Temperature)
which may indicate fouling. Clean evaporator if
necessary.

LOW SATURATED SUCTION — Several conditions can
lead to low saturated suction alarms and the chiller controls
have several override modes built in which will attempt to keep
the chiller from shutting down. Low fluid flow, low refrigerant
charge and plugged filter driers are the main causes for this
condition. To avoid permanent damage and potential freezing
of the system, do NOT repeatedly reset these alert and/or alarm
conditions without identifying and correcting the cause(s).
COMPRESSOR SAFETIES — The 30MP units with ComfortLink™ controls include a compressor protection board that
protects the operation of each of the compressors. Each board
senses the presence or absence of current to each compressor.
If there is a command for a compressor to run and there is
no current, then one of the following safeties or conditions
have turned the compressor off:
Compressor Overcurrent — All compressors have internal
line breaks or a motor protection device located in the compressor electrical box.
Compressor Short Circuit — There will not be current if the
compressor circuit breaker that provides short circuit protection
has tripped.
Compressor Motor Over Temperature — The internal linebreak or over temperature switch has opened.
High-Pressure Switch Trip — The high pressure switch has
opened. See Table 31 for the factory settings for the fixed high
pressure switch.
ASTP Protection Trip — All non-digital Copeland compressors are equipped with an advanced scroll temperature protection (ASTP). A label located above the terminal box identifies
models that contain this technology. See Fig. 25.
Advanced scroll temperature protection is a form of internal
discharge temperature protection that unloads the scroll compressor when the internal temperature reaches approximately
300 F. At this temperature, an internal bi-metal disk valve
opens and causes the scroll elements to separate, which stops
compression. Suction and discharge pressures balance while
the motor continues to run. The longer the compressor runs unloaded, the longer it must cool before the bi-metal disk resets.
See Fig. 26 for approximate reset times.

TROUBLESHOOTING
Complete Unit Stoppage and Restart — Possible causes for unit stoppage and reset methods are shown below and in Table 37. Refer to Fig. 3-7 for component arrangement and control wiring diagrams.
GENERAL POWER FAILURE — After power is restored,
restart is automatic through normal MBB start-up.
44

the compressor is commanded OFF and the current sensor
reads ON, an alert is generated. This will indicate that a compressor contactor has failed closed. In this case, a special mode,
Compressor Stuck on Control, will be enabled and all other
compressors will be turned off. An alarm will then be enabled
to indicate that service is required. Outdoor fans will continue
to operate. The condenser output is turned on immediately.

Alarms and Alerts — These are warnings of abnormal

or fault conditions, and may cause either one circuit or the
whole unit to shut down. They are assigned code numbers as
described in Table 38.
Automatic alarms will reset without operator intervention if
the condition corrects itself. The following method must be
used to reset manual alarms:
Before resetting any alarm, first determine the cause of the
alarm and correct it. Enter the Alarms mode indicated by the
LED on the side of the scrolling marquee display. Press
until the sub-menu item RCRN “RESET
ENTER and
ALL CURRENT ALARMS” is displayed. Press ENTER .
The control will prompt the user for a password, by displaying
PASS and WORD. Press ENTER to display the default password, 1111. Press ENTER for each character. If the password
has been changed, use the arrow keys to change each individual character. Toggle the display to “YES” and press ENTER .
The alarms will be reset.

Fig. 25 — Advanced Scroll Temperature
Protection Label

Recommended Cooling Time
(Minutes)

To manually reset ASTP, the compressor should be stopped
and allowed to cool. If the compressor is not stopped, the motor
will run until the motor protector trips, which occurs up to
90 minutes later. Advanced scroll temperature protection will
reset automatically before the motor protector resets, which
may take up to 2 hours.
High Discharge Gas Temperature Protection — Units
equipped with optional digital compressors have an additional
thermistor located on the discharge line, If discharge temperature exceeds 265 F (129.4 C), the digital compressor will be
shut off.
Alarms will also occur if the current sensor board malfunctions or is not properly connected to its assigned digital input. If

120
110
100
90
80
70
60
50
40
30
20
10
0
0

Compressor Unloaded Run Time (Minutes)
*Times are approximate.
NOTE: Various factors, including high humidity, high ambient temperature,
and the presence of a sound blanket will increase cool-down times.

Fig. 26 — Recommended Minimum Cool Down Time After Compressor is Stopped*

Table 37 — Troubleshooting
SYMPTOMS
Compressor Cycles
Off on Loss of Charge

Compressor Cycles Off on Out
of Range Condition

Compressor Shuts Down on
High-Pressure Control

Unit Operates Too Long
or Continuously

Unusual or Loud System
Noises

CAUSE
Loss of charge control. Acting erratically.
Low refrigerant charge
Low suction temperature
Thermistor failure
System load was reduced faster than controller could
remove stages
Temperature controller deadband setting is too low
High-pressure control acting erratically
Noncondensables in system
Condenser scaled/dirty
Fans in remote condensing unit (30MPA only) not operating
System overcharged with refrigerant
Low refrigerant charge
Control contacts fused
Air in system
Partially plugged or plugged expansion valve or filter drier
Defective insulation
Service load
Damaged compressor
Piping vibration
Expansion valve hissing
Compressor noisy

Compressor Loses Oil

Hot Liquid Line
Frosted Liquid Line
Frosted Suction Line

Freeze-Up

Leak in system
Mechanical damage (Failed seals or broken scrolls)
Oil trapped in line
Shortage of refrigerant due to leak
Restricted filter drier
Expansion valve admitting excess refrigerant (note: this is a
normal condition for brine applications)
Stuck TXV
Improper charging

System not drained for winter shutdown
Loose Thermistor

REMEDY
Repair leak and recharge.
Replace control.
Add refrigerant.
Raise cooler leaving fluid temperature set point.
Replace thermistor.
Unit will restart after fluid temperature rises back into the
control band. Avoid rapidly removing system load or
increase loop volume.
Raise deadband setting.
Replace control.
Purge system.
Clean condenser.
Repair or replace if defective.
Reduce charge.
Add refrigerant.
Replace control.
Purge system.
Clean or replace as needed.
Replace or repair as needed.
Keep doors and windows closed.
Check compressor and replace if necessary.
Support piping as required.
Check for loose pipe connections or damaged compressor
Add refrigerant.
Check for plugged liquid line filter drier.
Replace compressor (worn bearings).
Check for loose compressor holddown bolts.
Repair leak.
Replace compressor.
Check piping for oil traps.
Repair leak and recharge.
Replace filter drier.
Replace valve if defective.
Replace valve if defective.
Make sure a full quantity of fluid is flowing through the cooler
while charging, and suction pressure in cooler is equal to or
greater than pressure corresponding to 32 F (0° C).
Recommended that system be filled with an appropriate glycol mixture to prevent freezing of pumps and fluid tubing.
Verify thermistors are fully inserted in wells.

Table 38 — Alarm and Alert Codes
ALARM/
ALERT
CODE

ALARM
OR
ALERT

A048

Alarm

Circuit A Compressor
Availability Alarm

Two compressors on circuit
failed

Circuit shut down

Manual

Only one compressor
operating.

T051

Alert

Circuit A, Compressor 1
Failure

Compressor feedback signal
does not match relay state

Compressor A1 shut
down.

Manual

High-pressure switch open,
faulty CSB, loss of condenser
flow, filter drier plugged, noncondensables, operation
beyond capability.

Alarm

Circuit A, Compressor 1
Failure

Respective current sensor
board (CSB) feedback signal
is ON when the compressor
should be off

Unit shut down

Manual

High-pressure switch open,
faulty CSB, loss of condenser
flow, filter drier plugged, noncondensables, operation
beyond capability.

T052

Alert

Circuit A, Compressor 2
Failure

Compressor feedback signal
does not match relay state

Compressor A2 shut
down.

Manual

High-pressure switch open,
faulty CSB, loss of condenser
flow, filter drier plugged, noncondensables, operation
beyond capability.

A052

Alarm

Circuit A, Compressor 2
Failure

Respective current sensor
board (CSB) feedback signal
is ON when the compressor
should be off

Unit shut down

Manual

High-pressure switch open,
faulty CSB, loss of condenser
flow, filter drier plugged, noncondensables, operation
beyond capability.

T053

Alert

Circuit A, Compressor 3
Failure

Compressor feedback signal
does not match relay state

Compressor A3 shut
down.

Manual

High-pressure switch open,
faulty CSB, loss of condenser
flow, filter drier plugged, noncondensables, operation
beyond capability.

A053

Alarm

Circuit A, Compressor 3
Failure

Respective current sensor
board (CSB) feedback signal
is ON when the compressor
should be off

Unit shut down

Manual

High-pressure switch open,
faulty CSB, loss of condenser
flow, filter drier plugged, noncondensables, operation
beyond capability.

A060

Alarm

Cooler Leaving Fluid
Thermistor Failure

Thermistor outside range of
–40 to 245 F (–40 to 118 C)

Chiller shut down
immediately

Automatic

Thermistor failure, damaged
cable/wire or wiring error.

A061

Alarm

Cooler Entering Fluid
Thermistor Failure

Thermistor outside range of
–40 to 245 F (–40 to 118 C)

Chiller shut down
immediately

Automatic

Thermistor failure, damaged
cable/wire or wiring error.

T062

Alert

Condenser Leaving Fluid
Thermistor Failure

Thermistor outside range of
–40 to 245 F (–40 to 118 C)

Alert only.
No action taken.

Automatic

Thermistor failure, damaged
cable/wire or wiring error.

T063

Alert

Condenser Entering Fluid
Thermistor Failure

Thermistor outside range of
–40 to 245 F (–40 to 118 C)

Alert only.
No action taken.

Automatic

Thermistor failure, damaged
cable/wire or wiring error.

T068

None

Circuit A Return Gas
Thermistor Failure

If return gas sensors are
enabled (RG.EN) and
thermistor is outside range of
–40 to 245 F (–40 to 118 C)

Circuit A shut down

Automatic

Thermistor failure, damaged
cable/wire or wiring error.

T073

Alert

Outside Air Thermistor
Failure

Thermistor outside range of
–40 to 245 F (–40 to 118 C)
(if enabled)

Temperature reset
disabled. Chiller runs
under normal control/set
points.

Automatic

Thermistor failure, damaged
cable/wire or wiring error.

T074

Alert

Thermistor outside range of
Space Temperature/Dual Chiller –40 to 245 F (–40 to 118 C)
Thermistor Failure
(if enabled)

Temperature reset
disabled. Chiller runs
under normal control/set
points.

Automatic

Thermistor failure, damaged
cable/wire or wiring error.

A077

Alarm

Circuit A Saturated
Suction Temperature
exceeds Cooler Leaving
Fluid Temperature

Faulty expansion valve,
suction pressure transducer
or leaving fluid thermistor.

Circuit A shutdown after
pumpdown complete.

Manual

Faulty expansion valve or
suction pressure transducer
or leaving fluid thermistor.

T079

Alert

Lead/Lag LWT
Thermistor Failure

Thermistor outside range of
–40 to 245 F (–40 to 118 C)

Chiller runs as a stand
alone machine

Automatic

Dual LWT thermistor failure,
damaged cable/wire or
wiring error.

A090

Alarm

Circuit A Discharge
Pressure Transducer Failure

Outside of range (0 - 667 psig) Circuit A shut down

Automatic

Transducer failure, poor
connection to MBB, or wiring
damage/error.

A092

Alarm

Circuit A Suction
Pressure Transducer Failure

Outside of range (0 - 420 psig) Circuit A shut down

Automatic

Transducer failure, poor
connection to MBB, or wiring
damage/error.

T094

Alert

Discharge Gas
Thermistor Failure

Discharge thermistor (DTT) is
either open or shorted

Digital compressor shut
down.

Automatic

Thermistor failure, damaged
cable/wire or wiring error.

A110

Alarm

Circuit A Loss of Charge

If the compressors are off
and discharge pressure
reading is < 26 psig for
30 sec.

Circuit not allowed to
start.

Manual

Refrigerant leak or
transducer failure

A112

Alarm

Circuit A High Saturated
Suction Temperature

Circuit saturated suction
temperature pressure
transducer > 70 F (21.1 C)
for 5 minutes

Circuit shut down

Manual

Faulty Expansion valve,
faulty suction pressure
transducer or high entering
fluid temperature.

Alarm

Circuit A Low Suction
Superheat

Suction superheat is
less than 5° F (2.8 C) for 5
minutes. (if RGT installed)

A051

A114

DESCRIPTION

WHY WAS THIS
ALARM
GENERATED?

ACTION TAKEN
BY CONTROL

Circuit A shut down.

RESET
METHOD

Automatic restart
after first daily
occurrence.
Manual restart
thereafter.

PROBABLE
CAUSE

Faulty expansion valve,
faulty suction pressure
transducer, faulty suction gas
thermistor, circuit
overcharged

Table 38 — Alarm and Alert Codes (cont)
ALARM/
ALERT
CODE

ALARM
OR
ALERT

A116

Alarm

A122

Alarm

DESCRIPTION

Circuit A Low Cooler
Suction Temperature
High Pressure Switch
Trip Circuit A

WHY WAS THIS
ALARM
GENERATED?

ACTION TAKEN
BY CONTROL

Mode 7 caused the compressor to unload 6 consecutive times with less than a
Circuit shut down
30-minute interval between
each circuit shutdown.
High Pressure A Switch
Input opento MBB

Circuit shut down

RESET
METHOD

PROBABLE
CAUSE

Manual

Faulty expansion valve, low
refrigerant charge, plugged
filter drier, faulty suction
pressure transducer, low
cooler fluid flow

Manual

Faulty transducer/high
pressure switch.

Circuit shut down

Automatic, only
after first 3 daily
occurrences.
Manual reset
thereafter. Reading from OAT sensor must drop 5 F
(2.8 C) before
restart

Faulty transducer/high
pressure switch, low/
restricted condenser
airflow

Faulty or plugged EXV, low
refrigerant charge, EXV out
of adjustment, liquid
line valve partially closed

Alarm

Circuit A High
Discharge Pressure

SCT >Maximum condensing
temperature from operating
envelope

T133

Alert

Circuit A Low Suction
Pressure

Suction pressure below
34 psig for 8 seconds or
below 23 psig

Circuit shut down

Automatic
restart after first
daily occurrence.
Manual restart
thereafter.

A140

Alert

Reverse Rotation
Detected

Incoming chiller power leads
not phased correctly

Chiller not allowed to
start.

Manual

Reverse any two incoming
power leads to correct. Check
for correct fan rotation first.

A150

Alarm

Emergency Stop

CCN emergency stop
command received

Chiller shutdown
without going through
pumpdown.

Automatic once
CCN command for
EMSTOP returns to
normal

CCN Network
command.

A151

Alarm

Illegal Configuration

One or more illegal
configurations exists.

Chiller is not allowed to
start.

Manual once
configuration errors
are corrected

Configuration error.
Check unit settings.

A152

Alarm

Unit Down Due to
Failure

Both circuits are down due
to alarms/alerts.

Chiller is unable
to run.

Automatic once
alarms/alerts are
cleared that prevent the chiller from
starting.

Alarm notifies user
that chiller is 100%
down.

T153

Alert

Real Time Clock
Hardware Failure

Internal clock on MBB fails

Occupancy schedule
will not be used. Chiller
defaults to Local On
mode.

Automatic when
correct clock control restarts.

Time/Date/Month/
Day/Year not
properly set.

A154

Alarm

Serial EEPROM
Hardware Failure

Hardware failure with MBB

Chiller is unable
to run.

Manual

Main Base Board
failure.

T155

Alert

Serial EEPROM
Storage Failure

Configuration/storage
failure with MBB

No Action

Manual

Potential failure of
MBB. Download
current operating
software. Replace
MBB if error occurs again.

A156

Alarm

Critical Serial EEPROM
Storage Failure

Configuration/storage
failure with MBB

Chiller is not allowed
to run.

Manual

Main Base Board
failure.

A157

Alarm

A/D Hardware Failure

Hardware failure with
peripheral device

Chiller is not allowed
to run.

Manual

Main Base Board
failure.

Automatic

Wiring error, faulty
wiring or failed
Energy Management Module
(EMM).

A126

T173

Alert

Loss of Communication
with EMM

MBB loses communication
with EMM

4 to 20 mA
temperature reset
disabled. Demand
Limit set to 100%. 4 to
20 mA set point
disabled.

T174

Alert

4 to 20 mA Cooling Set
Point Input Failure

If configured with EMM and
input less than 2 mA or
greater than 22 mA

Set point function
disabled. Chiller
controls to CSP1.

Automatic

Faulty signal
generator, wiring
error, or faulty EMM.

T176

Alert

4 to 20 mA
Temperature Reset
Input Failure

If configured with EMM
and input less than 2 mA or
greater than 22 mA

Reset function
disabled. Chiller
returns to normal set
point control.

Automatic

Faulty signal
generator, wiring
error, or faulty EMM.

Alert

4 to 20 mA Demand
Limit Input Failure

If configured with EMM and
input less than 2 mA or
greater than 22 mA

Demand limit function
disabled. Chiller
returns to 100%
demand limit
control.

Automatic

Faulty signal
generator, wiring
error, or faulty EMM.

T177

See legend on page 51.

Table 38 — Alarm and Alert Codes (cont)
ALARM/
ALERT
CODE

T200

A201

A202

T203

T204

T205

T206

ALARM
OR
ALERT

DESCRIPTION

WHY WAS THIS
ALARM
GENERATED?

Alert

Cooler Flow/Interlock
Contacts failed to Close
at start-up

Cooler flow switch contacts
failed to close within
1 minute (if cooler pump
control is enabled) or
within 5 minutes (if cooler
pump control is not
enabled) after start-up

Alarm

Cooler Flow/Interlock
Contacts Opened
During Normal
Operation

RESET
METHOD

PROBABLE
CAUSE

Chiller not allowed to
start. For models with
dual pumps, the
second pump will be
started if available

Manual

Faulty flow switch or
interlock.

Flow switch opens for at
least 3 seconds after
being initially closed

All compressors shut
down. For models with
dual pumps, the
second pump will be
started if available

Manual

Cooler pump failure,
faulty flow switch or
interlock.

Alarm

Cooler Pump Interlock
Closed When Pump is
Off

If configured for cooler
pump control and flow
switch input is closed for
5 minutes while pump
output(s) are off

Chiller shut down

Alert

Loss of Communication
with slave chiller

Master chiller MBB
loses communication
with slave chiller MBB

Dual chiller control
disabled. Chiller runs
as a stand-alone
machine.

Alert

Loss of Communication
with master chiller

Slave chiller MBB loses
communication with
master chiller MBB

Dual chiller control
disabled. Chiller runs
as a stand-alone
machine

Alert

ACTION TAKEN
BY CONTROL

Dual chiller routine
disabled. Master/slave
run as stand-alone
chillers.

Automatic when
aux contacts open

Wiring error, faulty
pump contactor
(welded contacts)

Automatic

Wiring error, faulty
wiring, failed Slave
chiller MBB module,
power loss at slave
chiller, wrong slave
address.

Automatic

Wiring error, faulty
wiring, failed master
chiller MBB module,
power loss at Master
chiller.

Automatic

CCN Address for
both chillers is the
same. Must be
different. Check
CCN.A under the
OPT2 sub-mode in
Configuration at both
chillers.

Automatic

Building load greater
than unit capacity,
low water/brine flow
or compressor fault.
Check for other
alarms/alerts.

Master and slave chiller
with same address

Master and slave chiller
have the same CCN
address (CCN.A)

High Leaving Chilled
Water Temperature

LWT read is greater than
LCW Alert Limit, Total
capacity is 100% and LWT
is greater than LWT
reading one minute ago

Alert only. No action
taken.

Both EWT and LWT
must be at least 6 F
(3.3 C) above Brine
Freeze point
(BR.FZ). Automatic
for first, Manual reset
there after.
Manual

A207

Alarm

Cooler Freeze
Protection

Cooler EWT or LWT is less
than Brine Freeze (BR.FZ)

Chiller shutdown
without going through
pumpdown. Cooler
pump continues to
run a minimum of
5 minutes (if control
enabled).

A208

Alarm

EWT or LWT
Thermistor failure

Cooler EWT is less than
LWT by 3° F (1.7° C) for
1 minute after a circuit is
started

Chiller shutdown.
Cooler pump shut off
(if control enabled).

A220

Alarm

Condenser Pump
Interlock Failure to
Close
at Start-Up

If configured for condenser pump interlock
and the flow switch
input fails to close within 5 minutes after startup. Also valid when
configured for condenser pump control.

Condenser and cooler
pumps shut off.
Chiller shutdown without going through
pumpdown.

Manual

Failure of condenser
pump or controls.
Wiring error.

A221

Alarm

Condenser Pump
Interlock Opened During
Normal Operation

If configured for condenser pump interlock
and the flow switch
opens for 15 seconds
during normal
operation (or when
the condenser pump
relay is on when condenser pump control
is configured.)

Condenser and cooler
pumps shut off. Chiller
shutdown without
going through pumpdown.

Manual

Failure of condenser
pump or controls.
Wiring error.

A222

Alarm

Condenser Pump
Interlock Closed When
Pump is Off

If configured for condenser pump interlock
condenser pump control, and the flow
switch is closed
when pump relay is off.

Chiller is not allowed to
start.

Manual

Failure of condenser
pump relays or interlocks, welded
contacts.

Faulty thermistor
(T1/T2), low water
flow.

Faulty cooler pump,
low water flow,
plugged fluid
strainer.

Table 38 — Alarm and Alert Codes (cont)
ALARM/
ALERT
CODE

ALARM
OR
ALERT

DESCRIPTION

WHY WAS THIS
ALARM
GENERATED?

ACTION TAKEN
BY CONTROL

RESET
METHOD

Strainer Service
Countdown (S.T.DN)
expired. Complete strainer
blowdown and enter 'YES'
for Strainer Maintenance
Done (S.T.MN) item.

None

Automatic

PROBABLE
CAUSE

Routine strainer
maintenance
required

T302

Alert

Strainer Blowdown
Scheduled
Maintenance Due

T500

Alert

Current Sensor Board
A1 Failure

Alert occurs when CSB output is a constant high value

Compressor A1 shut
down

Automatic

T501

Alert

Current Sensor Board
A2 Failure

Alert occurs when CSB output is a constant high value

Compressor A2 shut
down

Automatic

T502

Alert

Current Sensor Board
A3 Failure

Alert occurs when CSB output is a constant high value

Compressor A3 shut
down

Automatic

T950

Alert

Loss of Communication
with Water System
Manager

No communications have
been received by the MBB
within 5 minutes of last
transmission

WSM forces removed.
Chiller runs under own
control

Automatic

Failed module, wiring
error, failed
transformer, loose
connection plug,
wrong address

T951

Alert

Loss of Communication
with Chillervisor System
Manager

No communications have
been received by the MBB
within 5 minutes of last
transmission

CSM forces removed.
Chiller runs under own
control

Automatic

Failed module, wiring
error, failed
transformer, loose
connection plug,
wrong address

CCN
CSB
CSM
CXB
EEPROM
EMM
EWT
EXV
HSM
LCW
LWT
MBB
OAT
RGT
WSM

—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

CSB failure.
CSB failure.
CSB failure.

LEGEND
Carrier Comfort Network
Current Sensor Board
Chiller System Manager
Compressor Expansion Board
Electronic Eraseable Programmable Read Only Memory
Energy Management Module
Entering Fluid Temperature
Electronic Expansion Valve
Hydronic System Manager
Leaving Chilled Water
Leaving Fluid Temperature
Main Base Board
Outdoor-Air Temperature
Return Gas Thermistor
Water System Manager

COMPRESSOR FAILURE ALERTS
A048 (Circuit A Compressor Availability Alarm) — This
alarm occurs when two compressors are unavailable to run on
a 3 compressor circuit. The control ensures proper oil return by
ensuring a circuit does not operate with one compressor for
longer than one hour of cumulative run time.
T051, T052, T053 (Circuit A Compresser Failures) — Alert
codes 051, 052, and 053 are for compressors A1, A2, and A3
respectively. These alerts occur when the current sensor (CS)
does not detect compressor current during compressor operation. When this occurs, the control turns off the compressor.
If the current sensor board reads OFF while the compressor
relay has been commanded ON, an alert is generated.
POSSIBLE CAUSES
Compressor Overload — Either the compressor internal overload protector is open or the external overload protector (Kriwan module) has activated. The external overload protector
modules are mounted in the compressor wiring junction box.
Temperature sensors embedded in the compressor motor windings are the inputs to the module. The module is powered with
24 vac from the units main control box. The module output is a
normally closed contact that is wired in series with the compressor contactor coil. In a compressor motor overload condition, contact opens, deenergizing the compressor contactor.
Low Refrigerant Charge — If the compressor operates for an
extended period of time with low refrigerant charge, the compressor ASTP device will open, which will cause the compressor to trip on its overload protection device.
Circuit Breaker Trip — The compressors are protected from
short circuit by a breaker in the control box.
Wiring Error — A wiring error might not allow the compressor to start.

To check out alerts T051-T053:
1. Turn on the compressor in question using Service Test
mode. If the compressor does not start, then most likely
the problem is one of the following: HPS open, open internal protection, circuit breaker trip, incorrect safety wiring, or incorrect compressor wiring.
2. If the compressor does start, verify it is rotating in the correct direction.
IMPORTANT: Prolonged operation in the wrong direction
can damage the compressor. Correct rotation can be verified by a gage set and looking for a differential pressure
rise on start-up.
IMPORTANT: If the CS is always detecting current, verify
that the compressor is on. If the compressor is on, check
the contactor and the relay on the MBB. If the compressor
is off and there is no current, verify the CSB wiring and
replace if necessary.
IMPORTANT: Return to Normal mode and observe compressor operation to verify that compressor current sensor
is working.
COMPRESSOR STUCK ON FAILURE ALARMS
Circuit A A051, A052, A053 — Alarm codes 051, 052, and
053 are for compressors A1, A2, and A3. These alarms occur
when the CSB detects current when the compressor should be
off. When this occurs, the control turns off the compressor.
If the current sensor board reads ON while the compressor
relay has been commanded OFF for a period of 4 continuous
seconds, an alarm is generated. These alarms are only monitored for a period of 10 seconds after the compressor relay has

been commanded OFF. This is done to facilitate a service technician forcing a relay to test a compressor.
In addition, if a compressor stuck failure occurs and the current sensor board reports the compressor and the request off,
certain diagnostics will take place as follows:
1. If any of the compressors are diagnosed as stuck on and
the current sensor board is on and the request is off, the
control will command the condenser fans to maintain
normal head pressure.
2. The control will shut-off all other compressors.
The possible causes include welded contactor or frozen
compressor relay on the MBB.
To check out alarms A051 to A053:

leaving water for 5 minutes. This alarm will occur if either the
suction pressure transducer reading, which is used to calculate
SST, or cooler leaving water is incorrect. Potential causes for
this alarm are loose wiring connection, sensor not located in
well or bad Schrader fitting. Reset is manual.
T079 (Dual Chiller Thermistor Failure) — This alert occurs
when the dual chiller temperature sensor is outside its range of
–40 to 240 F. Failure of this thermistor will disable Dual Chiller operation and return to stand-alone operation. The unit must
be configured for Dual Chiller operation for this alert to occur.
The cause of the alert is usually a faulty thermistor, a shorted or
open thermistor caused by a wiring error, or a loose connection.
Reset is automatic.
A090 (Circuit A Discharge Pressure Transducer Failure) —
This alarm occurs when the pressure is outside the range of 0.0
to 667.0 psig. A circuit cannot run when this alarm is active.
Use the scrolling marquee to reset the alarm. The cause of the
alarm is usually a faulty transducer, faulty 5-v power supply, or
a loose connection.
A092 (Circuit A Suction Pressure Transducer Failure) —
This alarm occurs when the pressure is outside the range of 0.0
to 420.0 psig. A circuit cannot run when this alarm is active.
Use the scrolling marquee to reset the alarm. The cause of the
alarm is usually a faulty transducer, faulty 5-v power supply, or
a loose connection.
T094 (Discharge Gas Thermistor Failure) — This alert occurs for units which have the digital compressor installed on
circuit A. If discharge gas temperature is open or shorted, the
circuit will be shut off. The alert will reset itself when discharge
temperature is less than 250 F (121.1 C). The cause of the alert
is usually low refrigerant charge or a faulty thermistor.
A110 (Circuit A Loss of Charge) — This alarm occurs when
the compressor is OFF and the discharge pressure is less than
26 psig.
A112 (Circuit A High Saturated Suction Temperature) —
Alarm code 112 occurs when compressors in a circuit have
been running for at least 5 minutes and the circuit saturated
suction temperature is greater than 70 F (21.1 C). The high saturated suction alarm is generated and the circuit is shut down.
A114 (Circuit A Low Superheat) — Alarm code 114 occurs
when the superheat of a circuit is less than 5 F (2.8 C) for 5
continuous minutes. The low superheat alarm is generated and
the circuit is shut down. The RGT sensor must be installed.
A122 (Circuit A, High Pressure Switch Failure) — The
high pressure switch is wired in series with the compressor
contactor coils of each compressor on the circuit to disable
compressor operation immediately upon a high discharge pressure condition. The normally closed contacts in the switches
are calibrated to open at 650 ± 10 psig which corresponds to a
saturated condensing temperature of 155.6 ± 1.3 F. The pressure switches will automatically reset when the discharge pressure is reduced to 500 ± 15 psig which corresponds to a saturated condensing temperature of 134.1 ± 2.4 F.
The output of the high pressure switch is wired to inputs on
the MBB to provide the control with an indication of a high
pressure switch trip. This alert could occur when compressors
are off if the wiring to the switch is broken or the switch has
failed open.
If the high pressure switch trips on a circuit with compressors commanded on, the discharge pressure is recorded. If the
recorded discharge pressure is between 630 to 660 psig (saturated condensing temperature between 153.0 and 156.9 F), and
is also less than the value recorded on any previous high pressure switch trip, the upper horizontal portion of the compressor
operating envelope (see Fig. 12) is lowered 0.4 F (3 psig). The
control will not allow the compressor operating envelope to be
lowered below 153.0 F (630 psig).

1. Place the unit in Service Test mode. All compressors
should be off.
2. Verify that there is not 24-v at the contactor coil. If there
is 24 v at the contactor, check relay on MBB and wiring.
3. Check for welded contactor.
4. Verify CSB wiring.
5. Return to Normal mode and observe compressor operation to verify that compressor current sensor is working
and condenser fans are energized.
A060 (Cooler Leaving Fluid Thermistor Failure) — The
sensor reading is outside the range of –40 to 245 F (–40 to
118 C) then the alarm will occur. The cause of the alarm is usually a faulty thermistor, a shorted or open thermistor caused by
a wiring error, or a loose connection. Failure of this thermistor
will shut down the entire unit.
A061 (Cooler Entering Thermistor Failure) — If the sensor
reading is outside the range of –40 to 240 F (–40 to116 C) then
the alarm will occur. The cause of the alarm is usually a faulty
thermistor, a shorted or open thermistor caused by a wiring error, or a loose connection. Failure of this thermistor will shut
down the entire unit.
T062 (Condenser Leaving Fluid Thermistor Failure) — The
sensor reading is outside the range of –40 to 245 F (–40 to
118 C) then the alert will occur. The cause of the alert is usually
a faulty thermistor, a shorted or open thermistor caused by a
wiring error, or a loose connection. Failure of this thermistor
will send out an alert only.
T063 (Condenser Entering Thermistor Failure) — If the sensor reading is outside the range of –40 to 240 F (–40 to116 C)
then the alert will occur. The cause of the alert is usually a
faulty thermistor, a shorted or open thermistor caused by a wiring error, or a loose connection.Failure of this thermistor will
send out an alert only.
T068 (Circuit A Compressor Return Gas Temperature
Thermistor Failure) — This alert occurs if the RGT is configured and the compressor return gas temperature sensor is outside the range of –40 to 240 F (–40 to 116 C). Failure of this
thermistor will shut down the appropriate circuit.
T073 (Outside Air Temperature Thermistor Failure) — This
alert occurs when the outside air temperature sensor is outside
the range of –40 to 240 F (–40 to 116 C). Failure of this thermistor will disable any elements of the control which requires its
use. The OAT must be configured.
T074 (Space Temperature Thermistor Failure) — This alert
occurs when the space temperature sensor is outside the range
of –40 to 245 F (–40 to 118 C). Failure of this thermistor will
disable any elements of the control which requires its use. The
cause of the alert is usually a faulty thermistor in the T55, or
T58 device, a shorted or open thermistor caused by a wiring error, or a loose connection. The SPT must be configured.
A077 (Circuit Saturated Suction Temperature Exceeds
Cooler Leaving Water Temperature) — This alarm occurs
when the saturated suction temperature (SST) is greater than
51

This is done to make a rough calibration of the high pressure switch trip point. In most cases this allows the control to
detect a high head pressure condition prior to reaching the high
pressure switch trip point.
When the trip occurs, all mechanical cooling on the circuit
is shut down for 15 minutes. After 15 minutes, the circuit is allowed to restart.
A126 (Circuit A High Head Pressure) — This alarm occurs
when the appropriate saturated condensing temperature is
greater than the operating envelope shown in Fig 12. Prior to
the alarm, the control will shut down one compressor on a circuit if that circuit's saturated condensing temperature is greater
than the maximum SCT minus 5° F (2.7° C). If SCT continues
to rise to greater than the maximum SCT, the alarm will occur
and the circuit's remaining compressor will shut down. The
cause of the alarm is usually an overcharged system, high outdoor ambient temperature coupled with dirty outdoor coil
(30MPA only), plugged filter drier, a faulty high-pressure
switch, or loss of condenser water flow.
A140 (Reverse Rotation Detected) — A test is made once, on
power up, for suction pressure change on the first activated circuit. The unit control determines failure as follows:
1. The suction pressure is sampled 5 seconds before the
compressor is brought on, right when the compressor is
brought on and 5 seconds afterwards.
2. The rate of suction pressure change from 5 seconds before the compressor is brought on to when the compressor is brought on is calculated.
3. The rate of suction pressure change from when the
compressor is brought on to 5 seconds afterwards is
calculated.
4. With the above information, the test for reverse rotation is
made. If the suction pressure change 5 seconds after compression is greater than the suction pressure change 5 seconds before compression – 1.25, then there is a reverse
rotation error.
This alarm will disable mechanical cooling and will require
manual reset. This alarm may be disabled once the reverse rotation check has been verified by setting REV.R = Yes.
A150 (Unit is in Emergency Stop) — If the CCN emergency
stop command is received, the alarm is generated and the unit
will be immediately stopped.
If the CCN point name "EMSTOP" in the system table is set
to emergency stop, the unit will shut down immediately and
broadcast an alarm back to the CCN, indicating that the unit is
down. This alarm will clear when the variable is set back to
"enable."
A151 (Illegal Configuration) — An A151 alarm indicates an
invalid configuration has been entered. The following are illegal configurations.

• Invalid unit size has been entered.
• Unit configuration set to invalid type.
A152 (Unit Down Due to Failure) — Reset is automatic
when all alarms are cleared. This alarm indicates the unit is at
0% capacity.
T153 (Real Time Clock Hardware Failure) — A problem
has been detected with MBB real time clock hardware. Try resetting the power and check the indicator lights. If the alarm
continues, the board should be replaced.
A154 (Serial EEPROM Hardware Failure) — A problem
has been detected with the EEPROM on the MBB. Try
resetting the power and check the indicator lights. If the alarm
continues, the board should be replaced.
T155 (Serial EEPROM Storage Failure Error) — A problem
has been detected with the EEPROM storage on the MBB. Try
resetting the power and check the indicator lights. If the alert
continues, the board should be replaced.
A156 (Critical Serial EEPROM Storage Failure Error) — A
problem has been detected with the EEPROM storage on the
MBB. Try resetting the power and check the indicator lights. If
the alarm continues, the board should be replaced.
A157 (A/D Hardware Failure) — A problem has been detected with A/D conversion on the boards. Try resetting the power
and check the indicator lights. If the alarm continues, the board
should be replaced.
T173 (Energy Management Module Communication Failure) — This alert indicates that there are communications
problems with the energy management. All functions performed by the EMM will stop, which can include demand limit, reset and capacity input. The alert will automatically reset.
T174 (4 to 20 mA Cooling Set point Input Failure) — This
alert indicates a problem has been detected with cooling set
point 4 to 20 mA input. The input value is either less than 2 mA
or greater than 22 mA.
T176 (4 to 20 mA Reset Input Failure) — This alert indicates a problem has been detected with reset 4 to 20 mA input.
The input value is either less than 2 mA or greater than 22 mA.
The reset function will be disabled when this occurs.
T177 (4 to 20 mA Demand Limit Input Failure) — This
alert indicates a problem has been detected with demand limit
4 to 20 mA input. The input value is either less than 2 mA or
greater than 22 mA. The reset function will be disabled when
this occurs.
T500, T501, T502 (Current Sensor Board Failure — A xx
Circuit A — Alert codes 500, 501, and 502 are for compressors A1, A2, and A3 respectively. These alerts occur when the
output of the CSB is a constant high value. These alerts reset
automatically. If the problem cannot be resolved, the CSB must
be replaced.

APPENDIX A — LOCAL DISPLAY TABLES
Run Status Mode and Sub-Mode Directory
SUB-MODE

VIEW

RUN

HOUR

STRT

VERS

ITEM

DISPLAY

CCN POINT

xxx
x
xxx
xx.xx

ITEM DESCRIPTION
AUTO VIEW OF RUN STATUS
Entering Fluid Temp
Leaving Fluid Temp
Active Setpoint
Control Point
Load/Unload Factor
Control Mode
Occupied
Override Modes in
Effect
Percent Total Capacity
Requested Stage
Current Alarms & Alerts
Time of Day

EWT
LWT
SETP
CTPT
LOD.F
STAT
OCC

xxx.x ºF
xxx.x ºF
xxx.x ºF
xxx.x ºF
xxx
NO/YES

MODE

NO/YES

CAP
STGE
ALRM
TIME
MNTH

Month of Year

MOY

DATE
YEAR

xx
xx

HRS.U

xxxx HRS

STR.U

xxxx

HR.P1

xxxx HRS

HR.P2

xxxx HRS

HR.A1

xxxx HRS

HR.A2

xxxx HRS

HR.A3

xxxx HRS

ST.A1
ST.A2
ST.A3

xxxx
xxxx
xxxx

STRN
SI.ST

xxxx HRS

S.T.DN

xxxx HRS

S.T.MN
ST.DT
S.T.M0
S.T.M1
S.T.M2
S.T.M3
S.T.M4

NO/YES

EWT
LWT
SP
CTRL_PNT
SMZ
STAT
OCC
MODE
CAP_T
STAGE
ALRMALRT
TIMECOPY

Day of Month
DOM
Year of Century
YOCDISP
UNIT RUN HOUR AND START
Machine Operating
HR_MACH
Hours
Machine Starts
CY_MACH
Cooler Pump Run
HR_CPUMP
Hours
Condenser Pump Run
HR_DPUMP
Hours
CIRC AND COMP RUN HOURS
Compressor A1 Run
HOURS_A1
Hours
Compressor A2 Run
HOURS_A2
Hours
Compressor A3 Run
HOURS_A3
Hours
COMPRESSOR STARTS
Compressor A1 Starts
CY_A1
Compressor A2 Starts
CY_A2
Compressor A3 Starts
CY_A3
PREVENTIVE MAINTENANCE
STRAINER MAINTENANCE
Strainer Srvc Interval
SI_STRNR
Strainer Srvc CountST_CDOWN
down
Strainer Maint. Done
ST_MAINT
STRAINER MAINT. DATES
MM/DD/YY HH:MM
MM/DD/YY HH:MM
MM/DD/YY HH:MM
MM/DD/YY HH:MM
MM/DD/YY HH:MM
SOFTWARE VERSION NUMBERS

AUX

CESR131333-xx-xx

MBB

CESR131279-xx-xx

EMM

CESR131174-xx-xx

MARQ

CESR131171-xx-xx

NAVI

CESR130227-xx-xx

COMMENT

00:00-23:59
1 - 12 (1 = January,
2 = February, etc.)
01-31

0 to 999999
0 to 1000000
0 to 999999.9
0 to 999999.9

0 to 999999
0 to 999999
0 to 999999
0 to 999999
0 to 999999
0 to 999999

0 to 65535
0 to 65535

APPENDIX A — LOCAL DISPLAY TABLES (cont)
Service Test Mode and Sub-Mode Directory
SUB-MODE

ITEM

TEST

OUTS

CMPA

DISPLAY

ITEM DESCRIPTION

CCN POINT

ON/OFF

Service Test Mode

MAN_CTRL

CLR.P
CND.P
UL.TM
CC.H
CW.VO
CW.VC
LL.SV
RMT.A

OFF/ON
OFF/ON
xx
OFF/ON
OFF/ON
OFF/ON
OFF/ON
OFF/ON

CC.A1
UL.TM
CC.A2
CC.A3
MLV

OFF/ON
xx
OFF/ON
OFF/ON
OFF/ON

COMMENT
To enable Service Test mode, move
Enable/Off/Remote contact switch
to
OFF. Change TEST to ON.
Move switch to ENABLE

OUTPUTS AND PUMPS
Cooler Pump Relay
S_CLPMP
Condenser Pump
S_CNDPMP
Comp A1 Unload Time
S_A1ULTM
Crankcase Heater
S_CCH
Condenser Valve Open
S_CWVO
Condenser Valve Close
S_CWVC
Liquid Line Solenoid
S_LLSV
Remote Alarm Relay
S_ALM
CIRCUIT A COMPRESSOR TST
Compressor A1 Relay
S_A1_RLY
Comp A1 Unload Time
S_A1ULTM
Compressor A2 Relay
S_A2_RLY
Compressor A3 Relay
S_A3_RLY
Minimum Load Valve Relay
S_MLV

0 to 15

Temperature Mode and Sub-Mode Directory
SUB-MODE

UNIT

CIR.A

ITEM
CEWT
CLWT
CDET
CDLT
OAT
SPT
DLWT
SCT.A
SST.A
RGT.A
D.GAS
SH.A

DISPLAY
ITEM DESCRIPTION
ENT AND LEAVE UNIT TEMPS
xxx.x °F
Cooler Entering Fluid
xxx.x °F
Cooler Leaving Fluid
xxx.x °F
Condenser Entering Fluid
xxx.x °F
Condenser Leaving Fluid
xxx.x °F
Outside Air Temperature
xxx.x °F
Space Temperature
xxx.x °F
Lead/Lag Leaving Fluid
TEMPERATURES CIRCUIT A
xxx.x °F
Saturated Condensing Tmp
xxx.x °F
Saturated Suction Temp
xxx.x °F
Compr Return Gas Temp
xxx.x °F
Discharge Gas Temp
xxx.x ΔF
Suction Superheat Temp

CCN POINT
COOL_EWT
COOL_LWT
COND_EWT
COND_LWT
OAT
SPT
DUAL_LWT
TMP_SCTA
TMP_SSTA
TMP_RGTA
DISGAS
SH_A

Pressures Mode and Sub-Mode Directory
SUB-MODE

ITEM

PRC.A

DP.A
SP.A

DISPLAY
ITEM DESCRIPTION
PRESSURES CIRCUIT A
xxx.x PSIG
Discharge Pressure
xxx.x PSIG
Suction Pressure

CCN POINT
DP_A
SP_A

APPENDIX A — LOCAL DISPLAY TABLES (cont)
Set Points Mode and Sub-Mode Directory
SUB-MODE

COOL

HEAD
FRZ

ITEM

DISPLAY

CSP.1
CSP.2
CSP.3

xxx.x °F
xxx.x °F
xxx.x °F

H.DP

xxx.x °F

BR.FZ

xx.x °F

ITEM DESCRIPTION
COOLING SETPOINTS
Cooling Setpoint 1
Cooling Setpoint 2
ICE Setpoint
HEAD PRESSURE SETPOINTS
Head Setpoint
BRINE FREEZE SETPOINT
Brine Freeze Point

RANGE

CCN POINT

–20 to 70
–20 to 70
–20 to 32

CSP1
CSP2
CSP3

85 to 120

HSP

–20 to 34

BRN_FRZ

Inputs Mode and Sub-Mode Directory
SUB-MODE

GEN.I

CRCT

4-20

ITEM
STST
FLOW
CD.FL
DLS1
DLS2
ICED
DUAL
FKA1
FKA2
FKA3
HPS.A
DMND
RSET
CSP

DISPLAY
ITEM DESCRIPTION
GENERAL INPUTS
OFF/ON
Start/Stop Switch
OFF/ON
Cooler Flow Switch
OFF/ON
Condenser Flow Switch
OFF/ON
Demand Limit Switch 1
OFF/ON
Demand Limit Switch 2
OFF/ON
Ice Done
OFF/ON
Dual Setpoint Switch
CIRCUIT INPUTS
OFF/ON
Compressor A1 Feedback
OFF/ON
Compressor A2 Feedback
OFF/ON
Compressor A3 Feedback
OFF/ON
High Pressure Switch A
4-20 MA INPUTS
xx.x
4-20 ma Demand Signal
xx.x
4-20 ma Reset Signal
xx.x
4-20 ma Cooling Setpoint

CCN POINT
START
COOLFLOW
CONDFLOW
DMD_SW1
DMD_SW2
ICE_DONE
DUAL_IN
K_A1_FBK
K_A2_FBK
K_A3_FBK
HPSA
LMT_MA
RST_MA
CSP_IN

Outputs Mode and Sub-Mode Directory
SUB-MODE

GEN.O

CIR.A

ITEM
C.LWP
C.DWP
ALRM
CDWO
CDWC
CC.A1
D.SOL
CC.A2
CC.A3
CCH
LLSV
MLV.R

DISPLAY
ITEM DESCRIPTION
GENERAL OUTPUTS
OFF/ON
Cooler Pump Relay
OFF/ON
Condenser Pump
OFF/ON
Alarm State
OFF/ON
Condenser Valve Open
OFF/ON
Condenser Valve Close
OUTPUTS CIRCUIT A
OFF/ON
Compressor A1 Relay
OFF/ON
Digital Scroll Solenoid
OFF/ON
Compressor A2 Relay
OFF/ON
Compressor A3 Relay
OFF/ON
Crankcase Heater Relay
OFF/ON
Liquid Line Solenoid
OFF/ON
Minimum Load Valve Relay

CCN POINT
COOLPUMP
CONDPUMP
ALM
COND_WVO
COND_WVC
K_A1_RLY
DISCRSOL
K_A2_RLY
K_A3_RLY
CCH_RLY
LLSV_A
MLV_RLY

APPENDIX A — LOCAL DISPLAY TABLES (cont)
Configuration Mode and Sub-Mode Directory
SUB-MODE

DISP

UNIT

OPT1

OPT2

ITEM

DISPLAY

TEST
METR

OFF/ON
OFF/ON

LANG

PAS.E
PASS

DSBL/ENBL
XXXX

TYPE

SIZE
SZA.1
SZA.2
SZA.3
A1.TY
MAX.T

XXX
XX
XX
XX
NO/YES
XX

FLUD

MLV.S
RG.EN
OAT.E
D.G.EN
CSB.E
CPC
PM.DY
DPME
DFLS
CDWS

NO/YES
DSBL/ENBL
DSBL/ENBL
DSBL/ENBL
DSBL/ENBL
OFF/ON
XX MIN
X
DSBL/ENBL
DSBL/ENBL

CTRL

LCWT
DELY
ICE.M

XX
XX
DSBL/ENBL

CCNA
CCNB

XXX
XXX

BAUD

ITEM DESCRIPTION
CCN POINT
DISPLAY CONFIGURATION
Test Display LEDs
DISPTEST
Metric Display
DISPUNIT
Language Selection
Password Enable
Service Password
UNIT CONFIGURATION

Unit Type

LANGUAGE
PASS_EBL
PASSCOPY

UNIT_TYP

Unit Size
SIZE
Compressor A1 Size
SIZE_A1
Compressor A2 Size
SIZE_A2
Compressor A3 Size
SIZE_A3
Compressor A1 Digital?
CPA1TYPE
Maximum A1 Unload Time
MAXULTME
UNIT OPTIONS 1 HARDWARE
Cooler Fluid
FLUIDTYP

Minimum Load Vlv Select
MLV_FLG
Return Gas Sensor Enable
RGT_ENA
Enable OAT Sensor
OAT_ENA
Dischrge Gas Temp Enable
DISGASEN
CSB Boards Enable
CSB_ENA
Cooler Pump Control
CPC
Cooler Pump Shutdown Dly
PUMP_DLY
Enable Condenser Pump
CONDPMPE
Enable Cond Flow Switch
CONDFLSW
Enable Cond Wtr Sensors
CONDWTRS
UNIT OPTIONS 2 CONTROLS
Control Method

CONTROL

LCW_LMT
High LCW Alert Limit
Minutes Off Time
DELAY
Ice Mode Enable
ICE_CNFG
CCN NETWORK CONFIGS
CCN Address
CCNADD
CCN Bus Number
CCNBUS

CCN
CCN Baud Rate

CCNBAUDD

COMMENT

Off = English On = Metric
Default: 0
0 = English
1 = Espanol
2 = Francais
3 = Portuguese
0 to 9999
2=Water Cooled, 3=Split
System
10 to 100

0 to 15
1 = Water
2 = Medium Temperature
Brine

0 to 10
0 to 2

0=Switch, 1=Occupancy,
2=Occupancy, 3=CCN
2 to 60
0 to 15

1 to 239
0 to 239
1 = 2400
2 = 4800
3 = 9600
4 =19,200
5 =38,400

APPENDIX A — LOCAL DISPLAY TABLES (cont)
Configuration Mode and Sub-Mode Directory (cont)
SUB-MODE

ITEM

DISPLAY

ITEM DESCRIPTION
RESET COOL TEMP

CCN POINT

CRST

Cooling Reset Type

CRST_TYP

MA.DG
RM.NO
RM.F
RM.DG
RT.NO
RT.F
RT.DG

XX.XΔF
XXX.X °F
XXX.X °F
XX.X °F
XXX.XΔF
XXX.XΔF
XX.X °F

4-20 - Degrees Reset
Remote - No Reset Temp
Remote - Full Reset Temp
Remote - Degrees Reset
Return - No Reset Temp
Return - Full Reset Temp
Return - Degrees Reset

420_DEG
REM_NO
REM_FULL
REM_DEG
RTN_NO
RTN_FULL
RTN_DEG

DMDC

Demand Limit Select

DMD_CTRL

DM20
SHNM
SHDL
SHTM
DLS1
DLS2

XXX%
XXX
XXX%
XXX
XXX%
XXX%

Demand Limit at 20 mA
Loadshed Group Number
Loadshed Demand Delta
Maximum Loadshed Time
Demand Limit Switch 1
Demand Limit Switch 2

DMT20MA
SHED_NUM
SHED_DEL
SHED_TIM
DLSWSP1
DLSWSP2

LLEN

DSBL/ENBL

Lead/Lag Chiller Enable

LL_ENA

MSSL
SLVA

SLVE/MAST
XXX

Master/Slave Select
Slave Address

MS_SEL
SLV_ADDR

LLBL

Lead/Lag Balance Select

LL_BAL

LLBD
LLDY
PARA

XXX
XXX
NO/YES

CLSP

Cooling Set Point Select

CLSP_TYP

RL.S

DSBL/ENBL

Ramp Load Select

RAMP_EBL

CRMP

X.X

Cooling Ramp Loading

CRAMP

SCHD
Z.GN

XX
X.X

EN.A1
EN.A2
EN.A3
REV.R

DSBL/ENBL
DSBL/ENBL
DSBL/ENBL
DSBL/ENBL

T.D.BC
OAT.B
G.S.BC
BC.AK

OFF/ON
OFF/ON
OFF/ON
OFF/ON

RSET

SLCT

SERV

BCST

Lead/Lag Balance Delta
LL_BAL_D
LL_DELAY
Lag Start Delay
Parallel Configuration
PARALLEL
SETPOINT AND RAMP LOAD

Schedule Number
SCHEDNUM
Deadband Multiplier
Z_GAIN
SERVICE CONFIGURATION
ENABLEA1
Enable Compressor A1
Enable Compressor A2
ENABLEA2
Enable Compressor A3
ENABLEA3
Reverse Rotation Enable
REVR_ENA
BROADCAST CONFIGURATION
CCN Time/Date Broadcast
CCNBC
CCN OAT Broadcast
OATBC
Global Schedule Broadcst
GSBC
CCN Broadcast Ack'er
CCNBCACK

COMMENT
0 = No Reset
1 = 4 to 20 mA Input
2 = Outdoor Air Temperature
3 = Return Fluid
4 = Space Temperature
-30 to 30
0 to125
0 to125
-30 to 30
0 to 30
0 to 10
-30 to 30
0 = None
1 = Switch
2 - 4 to 20 mA Input
3 = CCN Loadshed
0 to 100
0 to 99
0 to 60
0 to 120
0 to 100
0 to 100

0 to 239
0 = Master Leads
1 = Slave Leads
2 = Automatic
40 to 400 hours
0 to 30 minutes

0 = Single
1 = Dual Switch
2 = Dual CCN Occupied
3 = 4 to 20 mA Input

0.2 to 2
0 to 99
1 to 4

APPENDIX A — LOCAL DISPLAY TABLES (cont)
Time Clock Mode and Sub-Mode Directory
SUB-MODE
TIME

DATE

ITEM

DISPLAY

ITEM DESCRIPTION
CCN POINT
TIME OF DAY
Hour and Minute
TIME
MONTH, DATE, DAY, AND YEAR

HH.MM

XX.XX

MNTH

Month of Year

DOM

Day of Month

DOM

DAY

Day of Week

DOWDISP

YEAR

XXXX

YOCDISP

STR.M
STR.W
STR.D

XX
X
X

Year of Century
DAYLIGHT SAVINGS TIME
Month
Week
Day

MIN.A

Minutes to Add

MINADD

MOY

STARTM
STARTW
STARTD

DST
STP.M

Month

STOPM

STP.W
STP.D

XX
XX

Week
Day

STOPW
STOPD

MIN.S

Minutes to Subtract

MINSUB

HOL.L

HD.01

HD.02

HD.03

HD.04

HD.05

HD.06

HD.07

HD.08

MON
DAY
LEN

XX
XX
XX

MON
DAY
LEN

XX
XX
XX

MON
DAY
LEN

XX
XX
XX

MON
DAY
LEN

XX
XX
XX

MON
DAY
LEN

XX
XX
XX

MON
DAY
LEN

XX
XX
XX

MON
DAY
LEN

XX
XX
XX

MON
DAY
LEN

XX
XX
XX

LOCAL HOLIDAY SCHEDULES
HOLIDAY SCHEDULE 01
Holiday Start Month
Start Day
Duration (days)
HOLIDAY SCHEDULE 02
Holiday Start Month
Start Day
Duration (days)
HOLIDAY SCHEDULE 03
Holiday Start Month
Start Day
Duration (days)
HOLIDAY SCHEDULE 04
Holiday Start Month
Start Day
Duration (days)
HOLIDAY SCHEDULE 05
Holiday Start Month
Start Day
Duration (days)
HOLIDAY SCHEDULE 06
Holiday Start Month
Start Day
Duration (days)
HOLIDAY SCHEDULE 07
Holiday Start Month
Start Day
Duration (days)
HOLIDAY SCHEDULE 08
Holiday Start Month
Start Day
Duration (days)

COMMENT

1 to 12 (1 = January,
2 = February, etc.)
1 to 31
1 - 7 (1 = Sunday,
2 = Monday, etc.)
1999 to 2098
Default: 4 Range 1 to 12
Default: 1 Range 1 to 5
Default: 7 Range 1 to 7
Default: 60 Range 0 to
90
Default: 10 Range 1 to
12
Default: 5 Range 1to 5
Default: 7 Range 1 to 7
Default: 60 Range 0 to
90

HOLMON01
HOLDAY01
HOLLEN01

0 to 12
0 to 31
0 to 99

HOLMON02
HOLDAY02
HOLLEN02

0 to 12
0 to 31
0 to 99

HOLMON03
HOLDAY03
HOLLEN03

0 to 12
0 to 31
0 to 99

HOLMON04
HOLDAY04
HOLLEN04

0 to 12
0 to 31
0 to 99

HOLMON05
HOLDAY05
HOLLEN05

0 to 12
0 to 31
0 to 99

HOLMON06
HOLDAY06
HOLLEN06

0 to 12
0 to 31
0 to 99

HOLMON07
HOLDAY07
HOLLEN07

0 to 12
0 to 31
0 to 99

HOLMON08
HOLDAY08
HOLLEN08

0 to 12
0 to 31
0 to 99

APPENDIX A — LOCAL DISPLAY TABLES (cont)
Time Clock Mode and Sub-Mode Directory (cont)
SUB-MODE

HD.09

HD.10

HD.11

HD.12

HD.13

HD.14

HD.15

HD.16

HD.17

HD.18

HD.19

ITEM

DISPLAY

MON
DAY
LEN

XX
XX
XX

MON
DAY
LEN

XX
XX
XX

MON
DAY
LEN

XX
XX
XX

MON
DAY
LEN

XX
XX
XX

MON
DAY
LEN

XX
XX
XX

MON
DAY
LEN

XX
XX
XX

MON
DAY
LEN

XX
XX
XX

MON
DAY
LEN

XX
XX
XX

MON
DAY
LEN

XX
XX
XX

MON
DAY
LEN

XX
XX
XX

MON
DAY
LEN

XX
XX
XX

ITEM DESCRIPTION
HOLIDAY SCHEDULE 09
Holiday Start Month
Start Day
Duration (days)
HOLIDAY SCHEDULE 10
Holiday Start Month
Start Day
Duration (days)
HOLIDAY SCHEDULE 11
Holiday Start Month
Start Day
Duration (days)
HOLIDAY SCHEDULE 12
Holiday Start Month
Start Day
Duration (days)
HOLIDAY SCHEDULE 13
Holiday Start Month
Start Day
Duration (days)
HOLIDAY SCHEDULE 14
Holiday Start Month
Start Day
Duration (days)
HOLIDAY SCHEDULE 15
Holiday Start Month
Start Day
Duration (days)
HOLIDAY SCHEDULE 16
Holiday Start Month
Start Day
Duration (days)
HOLIDAY SCHEDULE 17
Holiday Start Month
Start Day
Duration (days)
HOLIDAY SCHEDULE 18
Holiday Start Month
Start Day
Duration (days)
HOLIDAY SCHEDULE 19
Holiday Start Month
Start Day
Duration (days)

CCN POINT

COMMENT

HOLMON09
HOLDAY09
HOLLEN09

0 to 12
0 to 31
0 to 99

HOLMON10
HOLDAY10
HOLLEN10

0 to 12
0 to 31
0 to 99

HOLMON11
HOLDAY11
HOLLEN11

0 to 12
0 to 31
0 to 99

HOLMON12
HOLDAY12
HOLLEN12

0 to 12
0 to 31
0 to 99

HOLMON13
HOLDAY13
HOLLEN13

0 to 12
0 to 31
0 to 99

HOLMON14
HOLDAY14
HOLLEN14

0 to 12
0 to 31
0 to 99

HOLMON15
HOLDAY15
HOLLEN15

0 to 12
0 to 31
0 to 99

HOLMON16
HOLDAY16
HOLLEN16

0 to 12
0 to 31
0 to 99

HOLMON17
HOLDAY17
HOLLEN17

0 to 12
0 to 31
0 to 99

HOLMON18
HOLDAY18
HOLLEN18

0 to 12
0 to 31
0 to 99

HOLMON19
HOLDAY19
HOLLEN19

0 to 12
0 to 31
0 to 99

APPENDIX A — LOCAL DISPLAY TABLES (cont)
Time Clock Mode and Sub-Mode Directory (cont)
SUB-MODE

HD.20

HD.21

HD.22

HD.23

HD.24

HD.25

HD.26

HD.27

HD.28

HD.29

HD.30

ITEM

DISPLAY

MON
DAY
LEN

XX
XX
XX

MON
DAY
LEN

XX
XX
XX

MON
DAY
LEN

XX
XX
XX

MON
DAY
LEN

XX
XX
XX

MON
DAY
LEN

XX
XX
XX

MON
DAY
LEN

XX
XX
XX

MON
DAY
LEN

XX
XX
XX

MON
DAY
LEN

XX
XX
XX

MON
DAY
LEN

XX
XX
XX

MON
DAY
LEN

XX
XX
XX

MON
DAY
LEN

XX
XX
XX

ITEM DESCRIPTION
HOLIDAY SCHEDULE 20
Holiday Start Month
Start Day
Duration (days)
HOLIDAY SCHEDULE 21
Holiday Start Month
Start Day
Duration (days)
HOLIDAY SCHEDULE 22
Holiday Start Month
Start Day
Duration (days)
HOLIDAY SCHEDULE 23
Holiday Start Month
Start Day
Duration (days)
HOLIDAY SCHEDULE 24
Holiday Start Month
Start Day
Duration (days)
HOLIDAY SCHEDULE 25
Holiday Start Month
Start Day
Duration (days)
HOLIDAY SCHEDULE 26
Holiday Start Month
Start Day
Duration (days)
HOLIDAY SCHEDULE 27
Holiday Start Month
Start Day
Duration (days)
HOLIDAY SCHEDULE 28
Holiday Start Month
Start Day
Duration (days)
HOLIDAY SCHEDULE 29
Holiday Start Month
Start Day
Duration (days)
HOLIDAY SCHEDULE 30
Holiday Start Month
Start Day
Duration (days)

CCN POINT

COMMENT

HOLMON20
HOLDAY20
HOLLEN20

0 to 12
0 to 31
0 to 99

HOLMON21
HOLDAY21
HOLLEN21

0 to 12
0 to 31
0 to 99

HOLMON22
HOLDAY22
HOLLEN22

0 to 12
0 to 31
0 to 99

HOLMON23
HOLDAY23
HOLLEN23

0 to 12
0 to 31
0 to 99

HOLMON24
HOLDAY24
HOLLEN24

0 to 12
0 to 31
0 to 99

HOLMON25
HOLDAY25
HOLLEN25

0 to 12
0 to 31
0 to 99

HOLMON26
HOLDAY26
HOLLEN26

0 to 12
0 to 31
0 to 99

HOLMON27
HOLDAY27
HOLLEN27

0 to 12
0 to 31
0 to 99

HOLMON28
HOLDAY28
HOLLEN28

0 to 12
0 to 31
0 to 99

HOLMON29
HOLDAY29
HOLLEN29

0 to 12
0 to 31
0 to 99

HOLMON30
HOLDAY30
HOLLEN30

0 to 12
0 to 31
0 to 99

APPENDIX A — LOCAL DISPLAY TABLES (cont)
Time Clock Mode and Sub-Mode Directory (cont)
SUB-MODE
SCH.N
SCH.L

PER.1

PER.2

PER.3

PER.4

PER.5

ITEM

DISPLAY

OCC.1

XX:XX

UNC.1

XX:XX

MON.1
TUE.1
WED.1
THU.1
FRI.1
SAT.1
SUN.1
HOL.1

NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES

OCC.2

XX:XX

UNC.2

XX:XX

MON.2
TUE.2
WED.2
THU.2
FRI.2
SAT.2
SUN.2
HOL.2

NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES

OCC.3

XX:XX

UNC.3

XX:XX

MON.3
TUE.3
WED.3
THU.3
FRI.3
SAT.3
SUN.3
HOL.3

NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES

OCC.4

XX:XX

UNC.4

XX:XX

MON.4
TUE.4
WED.4
THU.4
FRI.4
SAT.4
SUN.4
HOL.4

NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES

OCC.5

XX:XX

UNC.5

XX:XX

MON.5
TUE.5
WED.5
THU.5
FRI.5
SAT.5
SUN.5
HOL.5

NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES

ITEM DESCRIPTION
CCN POINT
Schedule Number 0
SCHEDNUM
LOCAL OCCUPANCY SCHEDULE
OCCUPANCY PERIOD 1
Period Occupied Time
PER1OCC
Period Unoccupied
PER1UNC
Time
Monday In Period
PER1MON
Tuesday In Period
PER1TUE
Wednesday In Period
PER1WED
Thursday In Period
PER1THU
Friday In Period
PER1FRI
Saturday In Period
PER1SAT
Sunday In Period
PER1SUN
Holiday In Period
PER1HOL
OCCUPANCY PERIOD 2
Period Occupied Time
PER2OCC
Period Unoccupied
PER2UNC
Time
Monday In Period
PER2MON
Tuesday In Period
PER2TUE
Wednesday In Period
PER2WED
Thursday In Period
PER2THU
Friday In Period
PER2FRI
Saturday In Period
PER2SAT
Sunday In Period
PER2SUN
Holiday In Period
PER2HOL
OCCUPANCY PERIOD 3
Period Occupied Time
PER3OCC
Period Unoccupied
PER3UNC
Time
Monday In Period
PER3MON
Tuesday In Period
PER3TUE
Wednesday In Period
PER3WED
Thursday In Period
PER3THU
Friday In Period
PER3FRI
Saturday In Period
PER3SAT
Sunday In Period
PER3SUN
Holiday In Period
PER3HOL
OCCUPANCY PERIOD 4
Period Occupied Time
PER4OCC
Period Unoccupied
PER4UNC
Time
Monday In Period
PER4MON
Tuesday In Period
PER4TUE
Wednesday In Period
PER4WED
Thursday In Period
PER4THU
Friday In Period
PER4FRI
Saturday In Period
PER4SAT
Sunday In Period
PER4SUN
Holiday In Period
PER4HOL
OCCUPANCY PERIOD 5
Period Occupied Time
PER5OCC
Period Unoccupied
PER5UNC
Time
Monday In Period
PER5MON
Tuesday In Period
PER5TUE
Wednesday In Period
PER5WED
Thursday In Period
PER5THU
Friday In Period
PER5FRI
Saturday In Period
PER5SAT
Sunday In Period
PER5SUN
Holiday In Period
PER5HOL

COMMENT
0 to 99

APPENDIX A — LOCAL DISPLAY TABLES (cont)
Time Clock Mode and Sub-Mode Directory (cont)
SUB-MODE

PER.6

PER.7

PER.8

OVR

ITEM

DISPLAY

OCC.6

XX:XX

UNC.6

XX:XX

MON.6
TUE.6
WED.6
THU.6
FRI.6
SAT.6
SUN.6
HOL.6

NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES

OCC.7

XX:XX

UNC.7

XX:XX

MON.7
TUE.7
WED.7
THU.7
FRI.7
SAT.7
SUN.7
HOL.7

NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES

OCC.8

XX:XX

UNC.8

XX:XX

MON.8
TUE.8
WED.8
THU.8
FRI.8
SAT.8
SUN.8
HOL.8

NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES

OVR.T
OVR.L
T.OVR

X
X
NO/YES

ITEM DESCRIPTION
OCCUPANCY PERIOD 6
Period Occupied Time
Period Unoccupied
Time
Monday In Period
Tuesday In Period
Wednesday In Period
Thursday In Period
Friday In Period
Saturday In Period
Sunday In Period
Holiday In Period
OCCUPANCY PERIOD 7
Period Occupied Time
Period Unoccupied
Time
Monday In Period
Tuesday In Period
Wednesday In Period
Thursday In Period
Friday In Period
Saturday In Period
Sunday In Period
Holiday In Period
OCCUPANCY PERIOD 8
Period Occupied Time
Period Unoccupied
Time
Monday In Period
Tuesday In Period
Wednesday In Period
Thursday In Period
Friday In Period
Saturday In Period
Sunday In Period
Holiday In Period
SCHEDULE OVERRIDE
Timed Override Hours
Override Time Limit
Timed Override

CCN POINT

COMMENT

PER6OCC
PER6UNC
PER6MON
PER6TUE
PER6WED
PER6THU
PER6FRI
PER6SAT
PER6SUN
PER6HOL
PER7OCC
PER7UNC
PER7MON
PER7TUE
PER7WED
PER7THU
PER7FRI
PER7SAT
PER7SUN
PER7HOL
PER8OCC
PER8UNC
PER8MON
PER8TUE
PER8WED
PER8THU
PER8FRI
PER8SAT
PER8SUN
PER8HOL
OVR_EXT
OTL
TIMEOVER

0 to 4 hours
0 to 4 hours

APPENDIX A — LOCAL DISPLAY TABLES (cont)
Operating Mode and Sub-Mode Directory
SUB-MODE

MODE

ITEM

DISPLAY

MD01
MD02
MD03
MD05
MD06
MD07
MD09
MD10
MD13
MD14
MD15
MD16
MD17
MD18
MD19
MD20
MD21
MD23
MD24

OFF/ON
OFF/ON
OFF/ON
OFF/ON
OFF/ON
OFF/ON
OFF/ON
OFF/ON
OFF/ON
OFF/ON
OFF/ON
OFF/ON
OFF/ON
OFF/ON
OFF/ON
OFF/ON
OFF/ON
OFF/ON
OFF/ON

ITEM DESCRIPTION
CCN POINT
MODES CONTROLLING UNIT
FSM controlling Chiller
MODE_1
WSM controlling Chiller
MODE_2
Master/Slave control
MODE_3
Ramp Load Limited
MODE_5
Timed Override in effect
MODE_6
Low Cooler Suction TempA
MODE_7
Slow Change Override
MODE_9
Minimum OFF time active
MODE_10
Dual Setpoint
MODE_13
Temperature Reset
MODE_14
Demand Limited
MODE_15
Cooler Freeze Protection
MODE_16
Low Temperature Cooling
MODE_17
High Temperature Cooling
MODE_18
Making ICE
MODE_19
Storing ICE
MODE_20
High SCT Circuit A
MODE_21
Minimum Comp. On Time
MODE_23
Pump Off Delay Time
MODE_24

COMMENT

APPENDIX A — LOCAL DISPLAY TABLES (cont)
Alarms Mode and Sub-Mode Directory
SUB-MODE

CRNT

RCRN

HIST

ITEM
AA01
AA02
AA03
AA04
AA05
AA06
AA07
AA08
AA09
AA10
AA11
AA12
AA13
AA14
AA15
AA16
AA17
AA18
AA19
AA20
AA21
AA22
AA23
AA24
AA25
NO/YES
AL01
AL02
AL03
AL04
AL05
AL06
AL07
AL08
AL09
AL10
AL11
AL12
AL13
AL14
AL15
AL16
AL17
AL18
AL19
AL20

DISPLAY

AXXX
TXXX
PXXX

ITEM DESCRIPTION
CCN POINT
CURRENTLY ACTIVE ALARMS

AXXX
TXXX
PXXX

Alarms are shown as
AXXX
Alerts are shown as TXXX

Current Alarms 1-25

Reset All Current Alarms
ALARM HISTORY

Alarm History 1-20

COMMENT

ALRESET

Alarms are shown as
AXXX
Alerts are shown as TXXX

APPENDIX B — CCN TABLES
CCN DISPLAY TABLES — A_UNIT (General Unit Parameters
DESCRIPTION
Control Mode
Occupied
CCN Chiller
Alarm State
Active Demand Limit
Override Modes in Effect
Percent Total Capacity
Requested Stage
Active Setpoint
Control Point
Entering Fluid Temp
Leaving Fluid Temp
Emergency Stop
Minutes Left for Start
PUMPS
Cooler Pump Relay
Condenser Pump
Cooler Flow Switch

VALUE
10-char ASCII
No/Yes
Stop/Start
6-char ASCII
NNN
No/Yes
NNN
NN
NNN.n
NNN.n
NNN.n
NNN.n
Enable/EMStop
5-char ASCII

UNITS

%
%
degF
degF
degF
degF

Off/On
Off/On
Off/On

POINT NAME
STAT
OCC
CHIL_S_S
ALM
DEM_LIM
MODE
CAP_T
STAGE
SP
CTRL_PNT
EWT
LWT
EMSTOP
MIN_LEFT

N
N
Y
N
Y
N
N
N
N
Y
N
N
Y
N

FORCIBLE

COOLPUMP
CONDPUMP
COOLFLOW

N
N
N

CCN DISPLAY TABLES — CIRCA_AN (Circuit A Analog Parameters)
DESCRIPTION
CIRCUIT A ANALOG VALUES
Percent Total Capacity
Percent Available Cap.
Discharge Pressure
Suction Pressure
Head Setpoint
Saturated Condensing Tmp
Saturated Suction Temp
Compr Return Gas Temp
Discharge Gas Temp
Suction Superheat Temp

VALUE

UNITS

NNN
NNN
NNN.n
NNN.n
NNN.n
NNN.n
NNN.n
NNN.n
NNN.n
NNN.n

%
%
PSIG
PSIG
degF
degF
degF
degF
degF
deltaF

POINT NAME
CAPA_T
CAPA_A
DP_A
SP_A
HSP
TMP_SCTA
TMP_SSTA
TMP_RGTA
DISGAS
SH_A

FORCIBLE
N
N
N
N
N
N
N
N
N
N

CCN DISPLAY TABLES — CIRCADIO (Circuit A Discrete Inputs/Outputs)
DESCRIPTION
CIRC. A DISCRETE OUTPUTS
Compressor A1 Relay
Compressor A2 Relay
Compressor A3 Relay
Minimum Load Valve Relay

VALUE

UNITS

Off/On
Off/On
Off/On
Off/On

K_A1_RLY
K_A2_RLY
K_A3_RLY
MLV_RLY

N
N

CIRC. A DISCRETE INPUTS
Compressor A1 Feedback
Compressor A2 Feedback
Compressor A3 Feedback

Off/On
Off/On
Off/On

K_A1_FBK
K_A2_FBK
K_A3_FBK

N
N

POINT NAME

FORCIBLE

APPENDIX B — CCN TABLES (cont)
CCN DISPLAY TABLES — OPTIONS (Unit Parameters)
DESCRIPTION
UNIT ANALOG VALUES
Cooler Entering Fluid
Cooler Leaving Fluid
Condenser Entering Fluid
Condenser Leaving Fluid
Lead/Lag Leaving Fluid

VALUE

UNITS

POINT NAME

NNN.n
NNN.n
NNN.n
NNN.n
NNN.n

degF
degF
degF
degF
degF

COOL_EWT
COOL_LWT
COND_EWT
COND_LWT
DUAL_LWT

N
N
N
N
N

TEMPERATURE RESET
4-20 ma Reset Signal
Outside Air Temperature
Space Temperature

NN.n
NNN.n
NNN.n

milliAmps
degF
degF

RST_MA
OAT
SPT

N
Y
Y

DEMAND LIMIT
4-20 ma Demand Signal
Demand Limit Switch 1
Demand Limit Switch 2
CCN Loadshed Signal

NN.n
Off/On
Off/On
N

milliAmps

LMT_MA
DMD_SW1
DMD_SW2
DL_STAT

N
N
N
N

MISCELLANEOUS
Dual Setpoint Switch
Cooler LWT Setpoint
Ice Done

Off/On
NNN.n
Off/On

DUAL_IN
LWT_SP
ICE_DONE

N
N
N

degF

FORCIBLE

CCN MAINTENANCE TABLES — STRTHOUR
DESCRIPTION
Machine Operating Hours
Machine Starts

VALUE
NNNNNN
NNNNNN

UNITS
hours

POINT NAME
HR_MACH
CY_MACH

Compressor A1 Run Hours
Compressor A2 Run Hours
Compressor A3 Run Hours

NNNNNN.n
NNNNNN.n
NNNNNN.n

hours
hours
hours

HR_A1
HR_A2
HR_A3

Compressor A1 Starts
Compressor A2 Starts
Compressor A3 Starts

NNNNNN
NNNNNN
NNNNNN

PUMP HOURS
Cooler Pump Run Hours
Condenser Pump Run Hours

NNNNNN.n
NNNNNN.n

CY_A1
CY_A2
CY_A3

hours
hours

HR_CPUMP
HR_DPUMP

APPENDIX B — CCN TABLES (cont)
CCN MAINTENANCE TABLES — CURRMODS
DESCRIPTION
CSM controlling Chiller
WSM controlling Chiller
Master/Slave control
Ramp Load Limited
Timed Override in effect
Low Cooler Suction TempA
Slow Change Override
Minimum OFF time active
Dual Setpoint
Temperature Reset
Demand Limited
Cooler Freeze Protection
Low Temperature Cooling
High Temperature Cooling
Making ICE
Storing ICE
High SCT Circuit A
Minimum Comp. On Time
Pump Off Delay Time
Low Sound Mode

VALUE
Off/On
Off/On
Off/On
Off/On
Off/On
Off/On
Off/On
Off/On
Off/On
Off/On
Off/On
Off/On
Off/On
Off/On
Off/On
Off/On
Off/On
Off/On
Off/On
Off/On

POINT NAME
MODE_1
MODE_2
MODE_3
MODE_5
MODE_6
MODE_7
MODE_9
MODE_10
MODE_13
MODE_14
MODE_15
MODE_16
MODE_17
MODE_18
MODE_19
MODE_20
MODE_21
MODE_23
MODE_24
MODE_25

CCN MAINTENANCE TABLES — ALARMS
DESCRIPTION
Active Alarm #1
Active Alarm #2
Active Alarm #3
Active Alarm #4
Active Alarm #5
Active Alarm #6
Active Alarm #7
Active Alarm #8
Active Alarm #9
Active Alarm #10
Active Alarm #11
Active Alarm #12
Active Alarm #13
Active Alarm #14
Active Alarm #15
Active Alarm #16
Active Alarm #17
Active Alarm #18
Active Alarm #19
Active Alarm #20
Active Alarm #21
Active Alarm #22
Active Alarm #23
Active Alarm #24
Active Alarm #25

VALUE
4-char ASCII
4-char ASCII
4-char ASCII
4-char ASCII
4-char ASCII
4-char ASCII
4-char ASCII
4-char ASCII
4-char ASCII
4-char ASCII
4-char ASCII
4-char ASCII
4-char ASCII
4-char ASCII
4-char ASCII
4-char ASCII
4-char ASCII
4-char ASCII
4-char ASCII
4-char ASCII
4-char ASCII
4-char ASCII
4-char ASCII
4-char ASCII
4-char ASCII

POINT NAME
ALARM01C
ALARM02C
ALARM03C
ALARM04C
ALARM05C
ALARM06C
ALARM07C
ALARM08C
ALARM09C
ALARM10C
ALARM11C
ALARM12C
ALARM13C
ALARM14C
ALARM15C
ALARM16C
ALARM17C
ALARM18C
ALARM19C
ALARM20C
ALARM21C
ALARM22C
ALARM23C
ALARM24C
ALARM25C

CCN MAINTENANCE TABLES — VERSIONS
DESCRIPTION
AUX
MBB
EMM
MARQUEE
NAVIGATOR

VERSION
CESR131333CESR131279CESR131174CESR131171CESR130227-

VALUE
5-char ASCII
5-char ASCII
5-char ASCII
5-char ASCII
5-char ASCII

APPENDIX B — CCN TABLES (cont)
CCN MAINTENANCE TABLES — LOADFACT
DESCRIPTION
CAPACITY CONTROL
Load/Unload Factor
Control Point
Entering Fluid Temp
Leaving Fluid Temp

VALUE
NNN
NNN.n
NNN.n
NNN.n

Ramp Load Limited
Slow Change Override
Cooler Freeze Protection
Low Temperature Cooling
High Temperature Cooling
Minimum Comp. On Time

Off/On
Off/On
Off/On
Off/On
Off/On
Off/On

UNITS

POINT NAME
SMZ
CTRL_PNT
EWT
LWT

degF
degF
degF

MODE_5
MODE_9
MODE_16
MODE_17
MODE_18
MODE_23

CCN MAINTENANCE TABLES — LEARNFNS
DESCRIPTION
SCT Delta for Comp A1
SCT Delta for Comp A2
SCT Delta for Comp A3
SAGP for Compressor A1
SAGM for Compressor A1
SAGP for Compressor A2
SAGM for Compressor A2
SAGP for Compressor A3
SAGM for Compressor A3
Reset short loop gain

VALUE
NNN.n
NNN.n
NNN.n
NNN.n
NNN.n
NNN.n
NNN.n
NNN.n
NNN.n
Yes/No

UNITS
deltaF
deltaF
deltaF

POINT NAME
A1SCTDT
A2SCTDT
A3SCTDT
SAGA1P
SAGA1M
SAGA2P
SAGA2M
SAGA3P
SAGA3M
RESET_GN

CCN MAINTENANCE TABLES — PM-STRN
DESCRIPTION
Strainer Srvc Interval
Strainer Srvc Countdown
Strainer Maint. Done
Strainer Maint. Date
Strainer Maint. Date
Strainer Maint. Date
Strainer Maint. Date
Strainer Maint. Date

VALUE
NNNNN
NNNNN
No/Yes

UNITS
hours
hours

15-char ASCII
15-char ASCII
15-char ASCII
15-char ASCII
15-char ASCII

POINT NAME
SI_STRNR
ST_CDOWN
ST_MAINT
STRN_PM0
STRN_PM1
STRN_PM2
STRN_PM3
STRN_PM4

CCN MAINTENANCE TABLES — TESTMODE
DESCRIPTION
Service Test Mode
Compressor A1 Relay
Compressor A2 Relay
Compressor A3 Relay
Cooler Pump Relay
Condenser Pump
Comp A1 Unload Time
Remote Alarm Relay

VALUE
Off/On
Off/On
Off/On
Off/On
Off/On
Off/On
NN
Off/On

UNITS

secs

POINT NAME
NET_CTRL
S_A1_RLY
S_A2_RLY
S_A3_RLY
S_CLPMP
S_CNDPMP
S_A1ULTM
S_ALM

APPENDIX B — CCN TABLES (cont)
CCN MAINTENANCE TABLES — RUNTEST
DESCRIPTION
Percent Total Capacity
Percent Available Cap.
Discharge Pressure
Suction Pressure
Saturated Condensing Tmp
Saturated Suction Temp
Compr Return Gas Temp
Discharge Gas Temp
Suction Superheat Temp
Compressor A1 Relay
Compressor A2 Relay
Compressor A3 Relay
Minimum Load Valve Relay
Compressor A1 Feedback
Compressor A2 Feedback
Compressor A3 Feedback

VALUE
NNN
NNN
NNN.n
NNN.n
NNN.n
NNN.n
NNN.n
NNN.n
NNN.n
Off/On
Off/On
Off/On
Off/On
Off/On
Off/On
Off/On

UNITS
%
%
PSIG
PSIG
degF
degF
degF
degF
deltaF

POINT NAME
CAPA_T
CAPA_A
DP_A
SP_A
TMP_SCTA
TMP_SSTA
TMP_RGTA
DISGAS
SH_A
K_A1_RLY
K_A2_RLY
K_A3_RLY
MLV_RLY
K_A1_FBK
K_A2_FBK
K_A3_FBK

Outside Air Temperature
Space Temperature
Cooler Pump Relay
Condenser Pump
Cooler Entering Fluid
Cooler Leaving Fluid
Cooler Flow Switch

NNN.n
NNN.n
Off/On
Off/On
NNN.n
NNN.n
Off/On

degF
degF

OAT
SPT
COOLPUMP
CONDPUMP
COOL_EWT
COOL_LWT
COOLFLOW

degF
degF

CCN MAINTENANCE TABLES — DUALCHIL
DESCRIPTION
Dual Chiller Link Good?
Master Chiller Role
Slave Chiller Role
Lead Chiller Ctrl Point
Lag Chiller Ctrl Point
Control Point

VALUE
No/Yes
12-char ASCII
12-char ASCII
NNN.n
NNN.n
NNN.n

UNITS

degF
degF
degF

POINT NAME
DC_LINK
MC_ROLE
SC_ROLE
LEAD_CP
LAG_CP
CTRL_PNT

Cool EnteringFluid-Slave
Cool Leaving Fluid-Slave
Cooler Entering Fluid
Cooler Leaving Fluid
Lead/Lag Leaving Fluid

NNN.n
NNN.n
NNN.n
NNN.n
NNN.n

degF
degF
degF
degF
degF

COOLEWTS
COOLLWTS
COOL_EWT
COOL_LWT
DUAL_LWT

Percent Avail.Capacity
Percent Avail.Cap.Slave

NNN
NNN

%
%

CAP_A
CAP_A_S

Lag Start Delay Time
Load/Unload Factor
Load/Unload Factor-Slave
Lead SMZ Clear Commanded
Lag SMZ Clear Commanded
Lag Commanded Off?
Dual Chill Lead CapLimit
Dual Chill Lag CapLimit

5-char ASCII
NNN
NNNN
No/Yes
No/Yes
No/Yes

LAGDELAY
SMZ
SMZSLAVE
LEADSMZC
LAG_SMZC
LAG_OFF

NNN.n
NNN.n

%
%

DCLDCAPL
DCLGCAPL

APPENDIX B — CCN TABLES (cont)
CCN CONFIGURATION TABLES — UNIT (Unit Configuration)
DESCRIPTION
Unit Type
Unit Size
Compressor A1 Size
Compressor A2 Size
Compressor A3 Size
Suction Superheat Setpt
Compressor A1 Digital?
Maximum A1 Unload Time

VALUE
N
NNN
NNN
NNN
NNN
NN.n
No/Yes
NN

DEFAULT

UNITS
tons
tons
tons
tons
deltaF
secs

POINT NAME
UNIT_TYP
SIZE
SIZE_A1
SIZE_A2
SIZE_A3
SH_SP
CPA1TYPE
MAXULTME

CCN CONFIGURATION TABLES — OPTIONS1 (Options 1 Configuration)
DESCRIPTION
Cooler Fluid
Minimum Load Vlv Select
Return Gas Sensor Enable
Enable OAT Sensor
Dischrge Gas Temp Enable
CSB Boards Enable
Reverse Rotation Enable
Cooler Pump Control
Cooler Pump Shutdown Dly
EMM Module Installed
Enable Condenser Pump
Enable Cond Wtr Sensors
Enable Cond Flow Switch

VALUE
N
No/Yes
Dsable/Enable
Dsable/Enable
Dsable/Enable
Dsable/Enable
Dsable/Enable
Off/On
NN
No/Yes
N
Dsable/Enable
Dsable/Enable

DEFAULT

UNITS

mins

POINT NAME
FLUIDTYP
MLV_FLG
RGT_ENA
OAT_ENA
DISGASEN
CSB_ENA
REVR_ENA
CPC
PUMP_DLY
EMM_BRD
CONDPMPE
CONDWTRS
CONDFLSW

CCN CONFIGURATION TABLES — OPTIONS2 (Options 2 Configuration)
DESCRIPTION
Control Method
Loading Sequence Select
Lead/Lag Circuit Select
Cooling Setpoint Select
Ramp Load Select
High LCW Alert Limit
Minutes off time
Deadband Multiplier
Ice Mode Enable

VALUE

DEFAULT

UNITS

N
N
N
N
Dsable/Enable
NN.n
NN
N.n
Dsable/Enable

deltaF
mins

POINT NAME
CONTROL
SEQ_TYPE
LEAD_TYP
CLSP_TYP
RAMP_EBL
LCW_LMT
DELAY
Z_GAIN
ICE_CNFG

CCN CONFIGURATION TABLES — SCHEDOVR (Timed Override Setup)
DESCRIPTION
Schedule Number
Override Time Limit
Timed Override Hours
Timed Override

VALUE
NN
N
N
No/Yes

DEFAULT
1
0
0
No

UNITS
hours
hours

POINT NAME
SCHEDNUM
OTL
OVR_EXT
TIMEOVER

APPENDIX B — CCN TABLES (cont)
CCN CONFIGURATION TABLES — RESETCON (Temperature Reset and Demand Limit)
DESCRIPTION
COOLING RESET
Cooling Reset Type
4-20 MA RESET
4-20 - Degrees Reset

VALUE

DEFAULT

UNITS

POINT NAME
CRST_TYP

NNN.n

deltaF

420_DEG

REMOTE RESET
Remote - No Reset Temp
Remote - Full Reset Temp
Remote - Degrees Reset

NNN.n
NNN.n
NNN.n

degF
degF
deltaF

REM_NO
REM_FULL
REM_DEG

RETURN TEMPERATURE RESET
Return - No Reset Temp
Return - Full Reset Temp
Return - Degrees Reset

NNN.n
NNN.n
NNN.n

deltaF
deltaF
deltaF

RTN_NO
RTN_FULL
RTN_DEG

DEMAND LIMIT
Demand Limit Select
Demand Limit at 20 mA
Loadshed Group Number
Loadshed Demand Delta
Maximum Loadshed Time
Demand Limit Switch 1
Demand Limit Switch 2

N
NNN
NN
NN
NNN
NNN
NNN

%
%
mins
%
%

DMD_CTRL
DMT20MA
SHED_NUM
SHED_DEL
SHED_TIM
DLSWSP1
DLSWSP2

CCN CONFIGURATION TABLES — DUALCHIL (Dual Chiller Configuration Settings)
DESCRIPTION
LEAD/LAG
Lead/Lag Chiller Enable
Master/Slave Select
Slave Address
Lead/Lag Balance Select
Lead/Lag Balance Delta
Lag Start Delay
Parallel Configuration

VALUE

DEFAULT

UNITS

Dsable/Enable
Master/Slave
NNN
N
NNN
NN
No/Yes

hours
mins

POINT NAME
LL_ENA
MS_SEL
SLV_ADDR
LL_BAL
LL_BAL_D
LL_DELAY
PARALLEL

CCN CONFIGURATION TABLES — DISPLAY (Marquee Display SETUP)
DESCRIPTION
Service Password
Password Enable
Metric Display
Language Selection

VALUE
NNNN
Dsable/Enable
Off/On
N

DEFAULT

UNITS

POINT NAME
PASSWORD
PASS_EBL
DISPUNIT
LANGUAGE

CCN CONFIGURATION TABLES — HPA
DESCRIPTION
SCT Delta for Comp A1
SCT Delta for Comp A2

VALUE
NNN.n
NNN.n

DEFAULT

UNITS
deltaF
deltaF

POINT NAME
A1SCTDT
A2SCTDT

APPENDIX B — CCN TABLES (cont)
CCN SERVICE TABLES — SERVICE
DESCRIPTION
SERVICE
Brine Freeze Point

VALUE
NNN.n

COMPRESSOR ENABLE
Enable Compressor A1
Enable Compressor A2
Enable Compressor A3

Dsable/Enable
Dsable/Enable
Dsable/Enable

DEFAULT

UNITS
degF

POINT NAME
BRN_FRZ

ENABLEA1
ENABLEA2
ENABLEA3

CCN SETPOINT TABLES — SETPOINT
DESCRIPTION
COOLING
Cooling Setpoint 1
Cooling Setpoint 2
ICE Setpoint

VALUE
NNN.n
NNN.n
NNN.n

RAMP LOADING
Cooling Ramp Loading

N.n

Brine Freeze Point

NNN.n

DEFAULT

UNITS
degF
degF
degF

POINT NAME
CSP1
CSP2
CSP3

CRAMP
degF

BRN_FRZ

Copyright 2010 Carrier Corporation
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53300053-01
Printed in U.S.A.
Form 30MP-1T
Pg 72
1-10
Replaces: New

START-UP CHECKLIST FOR 30MP LIQUID CHILLER
(Remove and use for job file.)
A. Preliminary Information
JOB NAME _______________________________________________________________________________
LOCATION _______________________________________________________________________________
INSTALLING CONTRACTOR _________________________________________________________________
DISTRIBUTOR ____________________________________________________________________________
START-UP PERFORMED BY _________________________________________________________________
EQUIPMENT:

Chiller:

MODEL NO.

SERIAL NO.

COMPRESSORS:
CIRCUIT A
MODEL NO.
SERIAL NO.

B. Preliminary Equipment Check (Yes or No)
IS THERE ANY SHIPPING DAMAGE?

IF SO, WHERE

_________________________________________________________________________________________
WILL THIS DAMAGE PREVENT UNIT START-UP?
CHECK POWER SUPPLY. DOES IT AGREE WITH UNIT?
HAS THE CIRCUIT PROTECTION BEEN SIZED AND INSTALLED PROPERLY? (refer to Installation Instructions)
ARE THE POWER WIRES TO THE UNIT SIZED AND INSTALLED PROPERLY? (refer to Installation Instructions)
HAS THE GROUND WIRE BEEN CONNECTED?
ARE ALL ELECTRICAL TERMINALS TIGHT?
ON BRINE UNITS, HAS THE COOLER FLUID BEEN PROPERLY PROTECTED FROM FREEZING TO AT
LEAST 15° F (8.3° C) BELOW THE LOWEST ANTICIPATED LEAVING FLUID TEMPERATURE SET POINT?
HAVE THE MAIN BASE BOARD, ENERGY MANAGEMENT MODULE (OPTION) AND CONTROL RELAY
CONNECTIONS BEEN CHECK FOR TIGHTNESS?

C. Unit Start-Up (insert check mark as each item is completed)
 CHILLER HAS BEEN PROPERLY INTERLOCKED WITH THE AUXILIARY CONTACTS OF THE CHILLED

FLUID PUMP STARTER.
 CHILLER HAS BEEN PROPERLY INTERLOCKED WITH THE AUXILIARY CONTACTS OF THE

CONDENSER WATER PUMP STARTER.
 CRANKCASE HEATERS HAVE BEEN ENERGIZED FOR A MINIMUM OF 24 HOURS PRIOR TO START-UP.

(30MPA UNITS ONLY)
 COMPRESSOR OIL LEVEL IS CORRECT.
 LIQUID LINE SERVICE VALVE IS BACKSEATED (30MPA UNITS ONLY).
 SET POINT SHOULD BE ADJUSTED TO THE DESIRED COOLER LEAVING FLUID TEMPERATURE.
(refer to installation instructions).

 LEAK CHECK THOROUGHLY: CHECK ALL COMPRESSORS, CONDENSER MANIFOLDS AND HEADERS,

TXVs, SOLENOID VALVES, FILTER DRIERS, FUSIBLE PLUGS, THERMISTORS, AND COOLER CONNECTIONS USING ELECTRONIC LEAK DETECTOR.
 LOCATE, REPAIR, AND REPORT ANY REFRIGERANT LEAKS.
 CHECK VOLTAGE IMBALANCE:

AB + AC + BC (divided by 3) = AVERAGE VOLTAGE =

MAXIMUM DEVIATION FROM AVERAGE VOLTAGE =
VOLTAGE IMBALANCE =

(MAX. DEVIATION)
AVERAGE VOLTAGE

x 100 =

% VOLTAGE IMBALANCE

IF OVER 2% VOLTAGE IMBALANCE, DO NOT ATTEMPT TO START CHILLER!
CALL LOCAL POWER COMPANY FOR ASSISTANCE.
 INCOMING POWER VOLTAGE TO CHILLER MODULES IS WITHIN RATED UNIT VOLTAGE

RANGE.
SYSTEM FLUID VOLUME IN LOOP:

GAL (L)

REFER TO INSTALLATION INSTRUCTIONS FOR MINIMUM FLUID VOLUME

CL-2

C. Unit Start-Up (cont)
CHECK PRESSURE DROP ACROSS COOLER.
FLUID ENTERING COOLER:

PSIG (kPa)

FLUID LEAVING COOLER:

PSIG (kPa)

(PSIG DIFFERENCE) x 2.31 = FT OF FLUID PRESSURE DROP =
PLOT COOLER PRESSURE DROP ON PERFORMANCE DATA CHART (LOCATED IN INSTALLATION
INSTRUCTIONS LITERATURE) TO DETERMINE TOTAL GPM (L/s).
TOTAL GPM (L/s) =

UNIT’S RATED MIN GPM (L/s) =

JOB’S SPECIFIED GPM (L/s) (if available):
NOTE: IF UNIT HAS LOW FLUID FLOW, FIND SOURCE OF PROBLEM: CHECK FLUID PIPING, IN-LINE
FLUID STRAINER, SHUT-OFF VALVES, CWP ROTATION, ETC.
COOLER LOOP FREEZE PROTECTION IF REQUIRED:
GALLONS (LITERS) ADDED:
PIPING INCLUDES ELECTRIC TAPE HEATERS IF PIPNG IS EXPOSED TO TEMPERATURES
BELOW FREEZING (Y/N):
COOLER/CONDENSER PROTECTION:
IN-LINE MINIMUM 40-MESH STRAINER INSTALLED WITHIN 10 FT OF THE COOLER/CONDENSER
WATER INLET.
COOLER: YES
CONDENSER: YES

NO
NO

VISUALLY CHECK MAIN BASE BOARD FOR THE FOLLOWING:
 INSPECT ALL THERMISTORS AND TRANSDUCERS FOR POSSIBLE CROSSED WIRES.
 CHECK TO BE SURE ALL WELL-TYPE THERMISTORS ARE FULLY INSERTED INTO THEIR

RESPECTIVE WELLS.
TO START THE CHILLER:
TURN THE EMERGENCY ON/OFF SWITCH (SW2) TO ON POSITION.
TURN THE ENABLE/OFF/REMOTE CONTACT SWITCH (SW1) TO THE ENABLE POSITION.
IF EQUIPPED WITH THE OPTIONAL SCROLLING MARQUEE, LEAVE THE ENABLE/OFF/REMOTE CONTACT
SWITCH (SW1) IN THE OFF POSITION.
NOTE: USE ESCAPE KEY TO GO UP ONE LEVEL IN THE STRUCTURE.
USE ARROW/ESCAPE KEYS TO ILLUMINATE RUN STATUS LED. PRESS ENTER KEY UNTIL
‘VERS’ IS DISPLAYED. PRESS ENTER KEY. RECORD INFORMATION ON THE FOLLOWING PAGE.

CL-3

C. Unit Start-Up (cont)
Record Software Versions
MODE — RUN STATUS
SOFTWARE VERSION NUMBERS

VERS

AUX

CESR131333-xx-xx

MBB

CESR131279-xx-xx

EMM

CESR131174-xx-xx

MARQ

CESR131171-xx-xx

NAVI

CESR130227-xx-xx

(PRESS ENTER AND ESCAPE SIMULTANEOUSLY TO OBTAIN SOFTWARE VERSIONS)
USE ARROW/ESCAPE KEYS TO ILLUMINATE CONFIGURATION LED. PRESS ENTER KEY. RECORD
INFORMATION BELOW.
UNIT (Configuration Settings)
SUBMODE

UNIT

ITEM
SIZE
SZA.1
SZA.2
SZA.3
A1.TY
MAX.T

ITEM EXPANSION
UNIT CONFIGURATION
UNIT SIZE
COMPRESSOR A1 SIZE
COMPRESSOR A2 SIZE
COMPRESSOR A3 SIZE
COMPRESSOR A1 DIGITAL?
MAXIMUM A1 UNLOAD TIME

DISPLAY

ENTRY

XXX
XX
XX
XX
NO/YES
XX

PRESS ESCAPE KEY TO DISPLAY ‘UNIT’. PRESS DOWN ARROW KEY TO DISPLAY ‘OPT1’.
PRESS ENTER KEY. RECORD CONFIGURATION INFORMATION BELOW:
OPTIONS1 (Options Configuration)
SUBMODE

OPT1

ITEM
FLUD
MLV.S
RG.EN
OAT.E
D.G.EN
CSB.E
CPC
PM.DY
DPME
DFLS
CDWS

ITEM EXPANSION
UNIT OPTIONS 1 HARDWARE
COOLER FLUID
MINIMUM LOAD VALVE SELECT
RETURN GAS SENSOR ENABLE
ENABLE OAT SENSOR
DISCHRGE GAS TEMP ENABLE
CSB BOARDS ENABLE
COOLER PUMP CONTROL
COOLER PUMP SHUTDOWN DLY
ENABLE CONDENSER PUMP
ENABLE COND FLOW SWITCH
ENABLE COND WTR SENSORS

DISPLAY
X
NO/YES
ENBL/DSBL
ENBL/DSBL
ENBL/DSBL
ENBL/DSBL
ON/OFF
XX MIN
ENBL/DSBL
ENBL/DSBL
ENBL/DSBL

PRESS ESCAPE KEY TO DISPLAY ‘OPT1’. PRESS DOWN ARROW KEY TO DISPLAY ‘OPT2’.
PRESS ENTER KEY.
RECORD CONFIGURATION INFORMATION ON NEXT PAGE.

CL-4

ENTRY

C. Unit Start-Up (cont)
OPTIONS2 (Options Configuration)
SUBMODE

OPT2

ITEM

ITEM EXPANSION
UNIT OPTIONS 2 CONTROLS
CONTROL METHOD
HIGH LCW ALERT LIMIT
MINUTES OFF TIME
ICE MODE ENABLE

CTRL
LCWT
DELY
ICE.M

DISPLAY

ENTRY

X
XX.X F
XX
ENBL/DSBL

PRESS ESCAPE KEY TO DISPLAY ‘OPT2’. PRESS DOWN ARROW KEY TO DISPLAY ‘CCN’.
PRESS ENTER KEY.
RECORD CONFIGURATION INFORMATION BELOW.
CCN (CCN Network Configuration)
SUB-MODE

CCN

ITEM

ITEM EXPANSION

DISPLAY

CCNA

CCN ADDRESS

XXX

CCNB

CCN BUS NUMBER

XXX

BAUD

CCN BAUD RATE

ENTRY

PRESS ESCAPE KEY SEVERAL TIMES TO GET TO THE MODE LEVEL (BLANK DISPLAY). USE THE
ARROW KEYS TO SCROLL TO THE SET POINT LED. PRESS ENTER TO DISPLAY SETPOINTS.
RECORD CONFIGURATION INFORMATION BELOW:
SETPOINT
SUBMODE

COOL

HEAD
FRZ

ITEM
CSP.1
CSP.2
CSP.3
H.DP
BR.FZ

ITEM EXPANSION
COOLING SETPOINTS
COOLING SETPOINT 1
COOLING SETPOINT 2
ICE SETPOINT
HEAD PRESSURE SETPOINTS
HEAD SET POINT
BRINE FREEZE SETPOINT
BRINE FREEZE POINT

DISPLAY

ENTRY

XXX.X °F
XXX.X °F
XXX.X °F
XXX.X °F
XXX.X °F

COMPONENT TEST
USE ESCAPE/ARROW KEYS TO ILLUMINATE CONFIGURATION LED. PRESS ENTER TO DISPLAY ‘DISP’.
PRESS ENTER AGAIN TO DISPLAY ‘TEST’ FOLLOWED BY ‘OFF’. PRESS ENTER TO STOP DISPLAY AT
‘OFF’ AND ENTER AGAIN SO ‘OFF’ DISPLAY FLASHES. ‘PASS’ AND ‘WORD’ WILL FLASH IF PASSWORD
NEEDS TO BE ENTERED. PRESS ENTER TO DISPLAY PASSWORD FIELD AND USE THE ENTER KEY FOR
EACH OF THE FOUR PASSWORD DIGITS. USE ARROW KEYS IF PASSWORD IS OTHER THAN STANDARD.
AT FLASHING ‘OFF’ DISPLAY, PRESS THE UP ARROW KEY TO DISPLAY ‘ON’ AND PRESS ENTER. ALL LED
SEGMENTS AND MODE LEDS WILL LIGHT UP. PRESS ESCAPE TO STOP THE TEST. PRESS ESCAPE TO
RETURN TO THE ‘DISP’ DISPLAY. PRESS THE ESCAPE KEY AGAIN AND USE THE ARROW KEYS TO ILLUMINATE THE SERVICE TEST LED. PRESS ENTER TO DISPLAY ‘TEST’. PRESS ENTER TO STOP DISPLAY
AT ‘OFF’ AND ENTER AGAIN SO ‘OFF’ FLASHES. PRESS THE UP ARROW KEY AND ENTER TO ENABLE
THE MANUAL MODE. PRESS ESCAPE AND DISPLAY NOW SAYS ‘TEST’ ‘ON’. TURN SWITCH (SW1) TO
THE ENABLE POSITION.
PRESS THE DOWN ARROW TO DISPLAY ‘OUTS’. PRESS THE ENTER KEY TO DISPLAY ‘LL.SV’. PRESS
THE ENTER KEY TO STOP DISPLAY AT ‘OFF’ AND ENTER AGAIN SO ‘OFF’ FLASHES. PRESS THE UP
ARROW KEY AND ENTER TO TURN THE OUTPUT ON. PRESS ENTER SO THE ‘ON’ DISPLAY FLASHES,
PRESS THE DOWN ARROW KEY AND THEN ENTER TO TURN THE OUTPUT OFF. OUTPUTS WILL ALSO BE
TURNED OFF OR SENT TO 0% WHEN ANOTHER OUTPUT IS TURNED ON. CHECK OFF THE ITEMS IN THE
SERVICE TEST TABLE ON THE NEXT PAGE THAT APPLY AFTER BEING TESTED.

CL-5

C. Unit Start-Up (cont)
USE ESCAPE KEY TO RETURN TO ‘OUTS’ DISPLAY. PRESS DOWN ARROW TO DISPLAY ‘CMPA’.
PRESS ENTER KEY TO DISPLAY ‘CC.A1’. NOTE THAT UNLOADERS AND HOT GAS BYPASS SOLENOIDS
CAN BE TESTED BOTH WITH AND WITHOUT COMPRESSOR(S) RUNNING. MAKE SURE ALL SERVICE
VALVES ARE OPEN AND COOLER/CONDENSER PUMPS HAVE BEEN TURNED ON BEFORE STARTING
COMPRESSORS. CHECK OFF EACH ITEM AFTER SUCCESSFUL TEST. THE CONTROL WILL ONLY START
ONE COMPRESSOR PER MINUTE. WHEN AT THE DESIRED ITEM, PRESS THE ENTER KEY TWICE TO
MAKE THE ‘OFF’ FLASH. PRESS THE UP ARROW KEY AND ENTER TO TURN THE OUTPUT ON. CHECK
OFF THE ITEMS IN THE SERVICE TEST TABLE BELOW THAT APPLY AFTER BEING TESTED.
SERVICE TEST
SUB-MODE

KEYPAD
ENTRY

ITEM

DISPLAY
ON/OFF

ENTER

ITEM
EXPANSION
SERVICE TEST MODE

TEST

COMMENT

Completed
(Yes/No)

To Enable Service Test Mode,
move Enable/Off/Remote
Contact switch to OFF. Change
TEST to ON. Move switch to
ENABLE.

OUTPUTS AND PUMPS
ENTER

OUTS

CLR.P

ON/OFF

COOLER PUMP RELAY

CND.P

ON/OFF

CONDENSER PUMP

UL.TM

0 TO 15

COMP A1 UNLOAD TIME

CC.H

ON/OFF

CRANKCASE HEATER

CW.VO

ON/OFF

CONDENSER VALVE OPEN

CW.VC

ON/OFF

CONDENSER VALVE CLOSE

LL.SV

ON/OFF

LIQUID LINE SOLENOID

RMT.A

ON/OFF

REMOTE ALARM RELAY

CC.A1

ON/OFF

COMPRESSOR A1 RELAY

UL.TM

0 TO 15

COMP A1 UNLOAD TIME

CC.A2

ON/OFF

COMPRESSOR A2 RELAY

CC.A3

ON/OFF

COMPRESSOR A3 RELAY

MLV

ON/OFF

MINIMUM LOAD VALVE RELAY

CIRCUIT A COMPRESSOR TEST
ENTER

CMPA

USE ARROW/ESCAPE KEYS TO ILLUMINATE THE TEMPERATURES LED. PRESS ENTER TO DISPLAY
‘UNIT’. PRESS ENTER AND USE THE ARROW KEYS TO RECORD TEMPERATURES FOR
SENSORS BELOW.

TEMPERATURE
CLWT
CEWT
CDET
CDLT
OAT or DLWT
SPT

CL-6

C. Unit Start-Up (cont)
ALL UNITS:
MEASURE THE FOLLOWING (MEASURE WHILE MACHINE IS IN A STABLE OPERATING CONDITION):
CIRCUIT A
DISCHARGE PRESSURE
SUCTION PRESSURE
DISCHARGE LINE TEMP
SUCTION LINE TEMP
SATURATED COND TEMP
COOLER ENTERING FLUID
COOLER LEAVING FLUID
CONDENSER ENTERING FLUID
CONDENSER LEAVING FLUID

CHECK AND ADJUST SUPERHEAT AS REQUIRED.

CL-7

COMMENTS:
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SIGNATURES:
START-UP TECHNICIAN ___________________________________________________________________
DATE __________________________________

CUSTOMER REPRESENTATIVE _____________________________________________________________
DATE ___________________________________

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -- - - - - - - - - - - - - - - - - - - CUT ALONG DOTTED LINE
CUT ALONG DOTTED LINE

C. Unit Start-Up (cont)

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Carrier Aquasnap Mpw015 045 Users Manual 30mp 1t

MPW015-045 to the manual e4caf960-1c0b-41e1-ab66-8d37e842de62

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