Friedrich Racservmn Users Manual Racservmn(7 17 03)_newest.p65

racservmn Room_Air_Service_Manual

2015-02-02

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Service Manual

Room Air Conditioners

RACServMn (7-03)

2003

Introduction

This service manual is designed to be used in conjunction

with the installation manuals provided with each air

conditioning system component.

This service manual was written to assist the professional

RAC service technician to quickly and accurately diagnose

and repair malfunctions.

This manual will deal with subjects in a general nature.

(i.e. all text will not pertain to all models).

IMPORTANT: It will be necessary for you to accurately

identify the unit you are servicing, so you can be certain of

a proper diagnosis and repair. (See Unit Identification.)

The information contained in this manual is intended

for use by a qualified service technician who is

familiar with the safety procedures required in

installation and repair, and who is equipped with the

proper tools and test instruments.

Installation or repairs made by unqualified persons

can result in hazards subjecting the unqualified

person making such repairs to the risk of injury or

electrical shock which can be serious or even fatal

not only to them, but also to persons being served

by the equipment.

If you install or perform service on equipment, you

must assume responsibility for any bodily injury or

property damage which may result to you or others.

Friedrich Air Conditioning Company will not be

responsible for any injury or property damage arising

from improper installation, service, and/or service

procedures.

Table of Contents

Unit Identification ............................................... 3

Unit Specifications ............................................. 4

Unit Performance ......................................... 5-11

Refrigeration Sequence of Operation .............. 12

Electrical Rating Tables ................................... 13

Compressor..................................................... 14

Thermal Overload (External) ........................... 14

Thermal Overload (Internal)............................. 15

Fan Motor ........................................................ 15

System Switches/Controls .......................... 15-24

Thermostats (Indoor) ..................................24-25

Thermostats (Defrost) ................................ 25-26

Resistor (Heat Anticipator) ............................... 26

Capacitor, Run ................................................. 26

Check Valve .................................................... 27

Heat Pump Reversing Valve ............................ 27

Solenoid Coil (Heat Pump Models) .................. 28

Valve, Drain Pan .............................................. 29

Heating Element .............................................. 29

Sealed Refrigeration Repairs ...................... 29-30

Refrigerant Charging .................................. 30-31

Undercharged Refrigerant Systems ........... 31-32

Overcharged Refrigerant Systems .................. 32

Restricted Refrigerant System ......................... 33

Routine Maintenance ....................................... 34

Troubleshooting .......................................... 34-45

Wiring Diagrams

"RS", "RM",................................................... 46

"SQ" ............................................................. 47

"KQ" ........................................................ 48-49

"XQ" ............................................................. 50

"YQ" ............................................................. 51

"SC" ............................................................. 52

"SS", "SM" .................................................... 53

"SL" .............................................................. 54

"KS", "KM", "KL" ........................................... 55

"ES", "EM", "EL", "EK" .................................. 56

"YS13", "YM", "YL" ....................................... 57

"YS09" .......................................................... 58

"EQ" ............................................................. 59

"WS"............................................................. 60

"WE"............................................................. 61

"WY"............................................................. 62

Testing XQ and QME Boards .......................... 63

Typical Unit Components

Return Air Grille/Filter

Discharge Air

Evaporator Coil

Blower Wheel

Capillary Tube

Condenser Fan Blade

Outdoor Grille

Sleeve

Condenser Coil

Compressor

Basepan

Front Cover

System Switches

Reversing Valve

(some models)

Fresh Air

Liquid Filter Driers

Blower Motor

UNIT IDENTIFICAUNIT IDENTIFICA

UNIT IDENTIFICATIONTION

TIONTION

TION

Model Number Code

SS08J 1 0 R

1st Digit – Function

S = Straight Cool, Value Series

C = Straight Cool, Budget

Series

Y = Heat Pump

E = Electric Heat

K = Straight Cool, Challenger

Series

W = Thru-the Wall,

WallMaster Series

2nd Digit

C = Casement

P = PowerMiser "Portable"

Q = Q-Star

M = Medium Chassis

L = Large Chassis

W = Built -In

H = HazardGard

3rd and 4th Digit -

Approximate BTU/HR

(Cooling)

Heating BTU/Hr capacity listed in

the Specification/Performance

Data Section

8th Digit – Engineering

Major change

7th Digit – Options

0 = Straight Cool & Heat Pump Models

1 = 1 KW Heat Strip, Normal

3 = 3 KW Heat Strip, Normal

4 = 4 KW Heat Strip, Normal

5 = 5 KW Heat Strip, Normal

8 = 8 KW Heat Strip, Normal

6th Digit – Voltage

1 = 115 Volts

2 = 230 Volts

3 = 230-208 Volts

5th Digit

Alphabetical Modifier

RAC Serial Number Identification Guide

Serial Number

Decade Manufactured

L=0 C=3 F=6 J=9

A=1 D=4 G=7

B=2 E=5 H=8

Year Manufactured

A=1 D=4 G=7 K=0

B=2 E=5 H=8

C=3 F=6 J=9

Month Manufactured

A=Jan D=Apr G=Jul K=Oct

B=Feb E=May H=Aug L=Nov

C=Mar F=Jun J=Sep M=Dec

L C G S 00001

Production Run Number

PRODUCT LINE

S=RAC

P=PTAC

E=EAC

V=VPAK

H=Split

PERFORMANCE R-22 BREAKER

DATA* REFRIG. FUSE

Cooling Discharge Temp. Suction Discharge Amps Locked Charge in 60 Hertz

Air Drop F. Rotar Amp OZ. Amps

EQ08J11-A 50.5 29.5 72 262 7.5 39.2 20 15

EQ08J11-B 50.5 29.5 74 259 7.5 39.2 20 15

DATA* R-22 BREAKER

Cooling REFRIG. FUSE

Discharge Temp. Suction Discharge Amps Locked Charge in 60 Hertz

Air Drop F. Rotar Amp OZ. Amps

XQ05J10B 55.45 24.55 79 245 4.6 34 20 15

XQ06J10-A 51.45 28.55 82 262 5.1 35 21 15

XQ06J10-B 51.45 28.55 79 254 5.1 35 21 15

XQ07J10-1 52.22 27.95 77 250 6.5 37 24 15

XQ08J10-1 50.5 29.5 72 262 4.5 38 20 15

XQ08J10-A 50.5 29.5 72 262 4.5 38 21 15

PERFORMANCE EVAPORATOR AIR ELECTRICAL R-22 BREAKER

DATA* TEMP. DEG. F. RATINGS REFRIG. FUSE

Cooling Discharge Temp. Suction Discharge Amps Locked Charge in 60 Hertz

Air Drop F. Rotar Amp OZ. Amps

SQ05J10B-B 55.45 24.55 79 245 4.4 34.'0 16.'0 15

SQ06J10B-A 51.45 28.55 82 262 5.2 35.'0 15.7 15

SQ06J10B-B 51.45 28.55 79 254 5.2 35.'0 15.7 15

SQ08J10C-1 50.5 29.5 72 262 7.5 39.2 19.5 15

PERFORMANCE R-22 BREAKER

DATA* REFRIG. FUSE

Cooling Discharge Temp. Suction Discharge Amps Locked Charge in 60 Hertz

Air Drop F. Rotar Amp OZ. Amps

KQ05J10B-B 56.34 28.66 73 251 5.2 29.'0 15.'0 15

KQ05E10-B 56.34 28.66 79 245 5.2 29.'0 15.'0 15

KQ05E10-C 56.34 28.66 79 245 5.2 29.'0 15.'0 15

KQ06J10B-A 58.02 21.98 82 262 5.8 35.'0 15.'0 15

KQ06J10B-B 58.02 21.98 80 269 5.8 35.'0 19.'0 15

KQ06E10-A 58.02 21.98 82 262 5.8 35.'0 15.'0 15

KQ06E10-B 58.02 21.98 79 254 5.8 35.'0 15.'0 15

YQ06J10B-A 54.1 25.9 81 267 5.7 39.2 19.'0 15

*Rating Conditions: 80 degree F. Room Air Temperature and 50% Relative Humidity with

95 degree F. Outside Air Temperature and 40% Relative Humitidy

ELECTRICAL

TEMP. DEG. F. PRESSURES RATINGS

EVAPORATOR AIR OPERATING

KQ-YQ PERFORMANCE DATA

SQ PERFORMANCE DATA

EQ PERFORMANCE DATA

EVAPORATOR AIR OPERATING ELECTRICAL

ELECTRICAL

RATINGS

EVAPORATOR AIR

TEMP. DEG. F.

OPERATING

PRESSURES

OPERATING

PRESSURES

XQ PERFORMANCE DATA

TEMP. DEG. F. PRESSURES RATINGS

PERFORMANCE R-22 BREAKE

DATA* REFRIG. FUSE

Cooling Discharge Temp. Suction Discharge Amps Locked Charge in 60 Hertz

Air Drop F. Rotar Amp OZ. Amps

RS10J10-C 61 19 82 248 7.5 44 26 15

RS12J10A-B 57 23 83 271 9.8 54 30 15

RS15J10-A 57 23 77 279 11.1 42 29.5 15

RS16J30A-A 56.5 24 77 296 7.2 42 30 15

RS18J30-A 56 24 72 293 8.7 42 48 15

RM24J30-A 57 23.65 68 301 12.2 44 54 15

PERFORMANCE R-22 BREAKE

DATA* REFRIG. FUSE

Cooling Discharge Temp. Suction Discharge Amps Locked Charge in 60 Hertz

Air Drop F. Rotar Amp OZ. Amps

YS09J10B-A 59 21 90 243 7.7 39.2 25 15

YS12J33-A 56 24 80 264 5.2/5.6 30 28 20

YM18J34B-A 53 27 74 284 8.7/9.2 42 54 30

YL24J35C-A 55 25 72 260 10.0/12.0 61 74 30

* Rating Conditions: 80 degree F. Room Air Temperature and 50% Relative Humidity with

95 degree F. Outside Air Temperature at 40% Relative Humidity.

RS-RM PERFORMANCE DATA

YS-YM-YL PERFORMANCE DATA

EVAPORATOR AIR OPERATING ELECTRICAL

TEMP. DEG. F. PRESSURES RATINGS

ELECTRICAL

RATINGS

EVAPORATOR AIR

TEMP. DEG. F.

OPERATING

PRESSURES

PERFORMANCE R-22 BREAKE

DATA* REFRIG. FUSE

Cooling Discharge Temp. Suction Discharge Amps Locked Charge in 60 Hertz

Air Drop F. Rotar Amp OZ. Amps

ES12J33B-A 58 22 82 265 5.76.6 26.3 28 20

ES16J33A-A 53 27 77 269 7.5/8.0 42.'0 30 20

EM18J34B-A 55 25 71 267 8.6/9.2 42.'0 40.5 30

EL25J35-A 55 25 75 284 11.5/12.6 61.'0 48.5 30

EL35J35-A 52 28 72 317 18/20 94.'0 60 30

EL35J35-B 52 28 72 317 18/20 94.'0 60 30

PERFORMANCE Heat Rise

DATA heating

ES12J33B-A 30.5 16/14.7

ES16J33A-A 30.5 16/14.7

EM18J34B-A 28.3 19.5/17

EL25J35-A 28.6 24/22/4

EL35J35-A 22.9 24/22.4

EL35J35-B 22.9 24/22.4

DATA* R-22 BREAKER

Cooling REFRIG. FUSE

Discharge Temp Amps Locked Charge in 60 Herts

Air Drop F. Rotar Amp OZ. Amps

KS10E10-A 61 19 82 248 9.1 48.3 26.08 15

KS10J10-B 61 19 80 263 9.1 48.3 26.88 15

KS12E10-A 57 23 83 271 10.8 54.'0 28 15

KS12J10B-A 57 23 84 268 10.8 54.'0 28 15

KS15J10-A 55.78 23.52 77 279 12.'0 67.'0 29.5 15

KS12J30B-A 57 23 76 285 6.2 26.'0 30.08 15

KS18J30-A 56 24 72 293 8.7 48 48 15

KM20J30-A 55 24 70 279 9.9 48 48 15

KM24J30-A 55 25 68 301 15.'0 71.'0 54.08 15

* Rating Conditions: 80 degree F. Room Air Temperature and 50% Relative Humidity with

95 degree F. Outside Air Temperature at 40% Relative Humidity.

KS-KM PERFORMANCE DATA

EVAPORATOR AIR OPERATING ELECTRICAL

ELECTRICAL

RATINGS

EVAPORATOR AIR

TEMP. DEG. F.

OPERATING

PRESSURES

TEMP. DEG. F. PRESSURES RATINGS

PERFORMANCE R-22 BREAKE

DATA* REFRIG. FUSE

Cooling Discharge Temp. Suction Discharge Amps Locked Charge in 60 Hertz

Air Drop F. Rotar Amp OZ. Amps

SS08J10R-B 61.4 18.6 87 251 6.7 29 39.'0 15

SS08J10R-A 61.4 18.6 84 248 6.7 36.2 24.'0 15

SS09J10C-A 57.8 22.2 82 254 7.4 44 22.6 15

SS10J10AR-A 57.22 22.78 84 245 7.5 42 26.'0 15

SS12J10AR-B 57.2 22.8 83 271 9.8 44 30.'0 15

SS14J10R-A 57.22 22.9 77 279 12 61 29.5 15

SS12J30D-A 57.2 22.8 82 265 5.0/5.2 21 27.5 20

SS16J30A-A 56.9 23 77 296 7.5/8.0 28 30.'0 20

SS18J30R-A 56.9 23 77 293 8.1/8.7 45 48 20

PERFORMANCE R-22 BREAKE

DATA* REFRIG. FUSE

Cooling Discharge Temp Suction Discharge Amps Locked Charge in 60 Hertz

Air Drop F. Rotar Amp OZ. Amps

SM20J30-A 52.58 27.42 70 279 9.9 43 47 20

SM24J30-A 54.86 25.14 68 301 12.2 68 54 20

SL25J30-A 52.32 27.68 75 284 11.5/12.6 68 48.5 20

SL28J30B-A 52.1 26.9 74 278 13.0/14.2 88 50 20

SL35J30-A 52.93 27.07 72 317 18.0/20.0 92 60 30

SL35J30-B 52.93 27.07 72 317 18.0/20.0 92 60 30

* Rating Conditions: 80 degree F. Room Air Temperature and 50% Relative Humidity with

95 degree F. Outside Air Temperature at 40% Relative Humidity.

SS PERFORMANCE DATA

SM-SL PERFORMANCE DATA

EVAPORATOR AIR OPERATING ELECTRICAL

ELECTRICAL

RATINGS

EVAPORATOR AIR

TEMP. DEG. F.

OPERATING

PRESSURES

TEMP. DEG. F PRESSURES RATINGS

PERFORMANCE R-22 BREAKER

DATA* REFRIG. FUSE

Cooling Discharge Temp. Suction Discharge Amps Locked Charge in 60 Hertz

Air Drop F. Rotar Amp OZ. Amps

WS07A10E-B 59.5 19.5 84 300 7.'0 32 19 15

WS07A10E-C 59.5 19.5 85 299 7.'0 32 28 15

WS07A10E-D 59.5 19.5 85 299 7.'0 32 20 15

WS10A10-A 58 22 83 307 9.8 48 25 15

WS10A10-B 58 22 83 307 9.8 48 26 15

WS12A10E-B 55 25 81 290 11.9 54 28.5 15

WS13A10-A 55 25 79 281 12 55 36 15

WS09A30E-B 58 22 86 302 4.7 44 22 15

WS12A30E-A 47.1 32.9 80 308 11.9 54 27.5 15

WS12A30E-B 46 33 80 305 11.9 54 42 15

WS15A30-A 47 33 72 310 8.5 42 43.5 15

DATA* R-22 BREAKER

Cooling REFRIG. FUSE

Discharge Temp. Suction Discharge Amps Locked Charge in 60 Hertz

Air Drop F. Rotar Amp OZ. Amps

WE09A33E-C 58 22 86 302 4.7 44 23 20

WE12A33E-B 55 25 80 308 6.5 54 27.5 20

WE15A33-A 47.1 32.9 71 310 8.5 42 43.5 20

WY09A33F-A 58 22 83 288 4.3 44 24 20

WY12A33G-A 55 25 81 295 6.2 54 37 20

PERFORMANCE Heat Rise

DATA heating

WE15A33-A 40 16.2

WE09A33E-C 39 14.7

WE12A33E-B 36 14.7

* Rating Conditions: 80 degree F. Room Air Temperature and 50% Relative Humidity

95 degree F. Outside Air Temperature at 40% Relative Humidity

WS PERFORMANCE DATA

WE-WY PERFORMANCE DATA

EVAPORATOR OPERATION ELECTRICAL

ELECTRICAL

RATINGS

EVAPORATOR AIR

TEMP. DEG. F.

OPERATING

PRESSURES

TEMP. DEG. F. PRESSURES RATINGS

PERFORMANCE DATA *YS09J10B-A **YS12J33-A **YM18J34A-A **YL24J35C-A

(Heating)

AHAM @ 70°F Inside 47°F Outside 8300 12400/12300 17200/17200 23000/22800

@ 70°F Inside 35°F Outside 10700/8900 13000/10600 17300/14300

Evaporator Air Temperature Rise

@ 70°F Inside 47°F Outside 19.62 31.38 24.74 31.71

@ 70°F Inside 35°F Outside 28.69/23.87 24.46/20.22 24.38/20.16

AMPS @ 70°F Inside 47°F Outside 6.7 6.0/6.5 8.5/9.0 10.4/11.5

@ 70°F Inside 35°F Outside 16.0/14.7 19.5/17.0 24.0/22.4

Watts @ 70°F Inside 47°F Outside 760 1340/1300 1880/1820 2350/2340

@ 70°F Inside 35°F Outside 3500/2900 5500/4650 5500/4650

Suction/Head PSIG

@ 70°F Inside 47°F Outside 53.5/222 52.5/251 53/225 54/236.5

* Do not operate below 37° ambient.

** Heating element comes on at 35°F outside ambient and compressor shuts off.

SPECIFICATIONS SC06H10E

BTUH (Cooling) 5950

E.E.R. (Cooling) 8.0

Volts 115

Amperes (Cooling) 6.8

Total Watts (Cooling) 760

Hertz 60

Fuse/Breaker Size 15

Fan RPM 1595

Evaporator Air CFM 125

Dehumidification Pts/Hr 2.0

Width 1411/16"

Height 1013/16"

Depth 27"

Minimum Ext. Into Room 2½"

Minimum Ext. To Outside 15½"

Net Weight 70

Shipping Weight 80

PERFORMANCE DATA* SC06H10E

DISCHARGE 56.1

EVAPORATOR AIR AIR

TEMP. °F TEMP 23.9

DROP °F

OPERATING SUCTION 72

PRESSURES DISCHARGE 293

AMPS 6.8

ELECTRICAL

RATINGS LOCKED 35.0

ROTOR AMPS

R-22 CHARGE IN 14

REFRIG. OUNCES

COMP. CHARGE IN 9.8

OIL FLUID OZ.

* Rating Conditions:

80°F Room Air Temperature and 50% Relative Humidity with

95°F Outside Air Temperature at 40% Relative Humidity.

PERFORMANCE DATA *WY09A33F-A *WY12A33F-A

(Heating)

BTUH @70°F Inside 62°F Outside 9700 12400

@70°F Inside 57°F Outside 9300 12000

@70°F Inside 52°F Outside 8800 11400

** @70°F Inside 47°F Outside 8200/8100 10800/10400

@70°F Inside 42°F Outside 7600 10000

@70°F Inside 37°F Outside 6800 9000

@70°F Inside 35°F Outside 11000/9100 11000/9100

Evaporator Air Temperature Rise

@70°F Inside 62°F Outside 32.00 37.60

@70°F Inside 57°F Outside 30.75 36.40

@70°F Inside 52°F Outside 29.10 34.50

** @70°F Inside 47°F Outside 27.10/26.80 32.70/31.50

@70°F Inside 42°F Outside 25.10 30.30

@70°F Inside 37°F Outside 22.50 27.30

@70°F Inside 35°F Outside 36.40/30.10 33.30/27.60

AMPS @70°F Inside 62°F Outside 4.0 5.6

@70°F Inside 57°F Outside 3.9 5.5

@70°F Inside 52°F Outside 3.85 5.4

** @70°F Inside 47°F Outside 3.8/4.1 5.3/5.6

@70°F Inside 42°F Outside 3.6 5.1

@70°F Inside 37°F Outside 3.4 4.8

@70°F Inside 35°F Outside 16.0/14.7 16.0/14.7

Watts @70°F Inside 62°F Outside 880 1280

@70°F Inside 57°F Outside 870 1260

@70°F Inside 52°F Outside 860 1220

** @70°F Inside 47°F Outside 835/810 1175/1155

@70°F Inside 42°F Outside 800 1130

@70°F Inside 37°F Outside 760 1070

@70°F Inside 35°F Outside 3550/2950 3550/2950

Suction/Head PSIG

@70°F Inside 62°F Outside 66/315 61/325

@70°F Inside 57°F Outside 62/285 59/290

@70°F Inside 52°F Outside 57/285 53/275

** @70°F Inside 47°F Outside 53/265 49/255

@70°F Inside 42°F Outside 49/215 45/240

@70°F Inside 37°F Outside 45/203 41/220

@70°F Inside 35°F Outside 44/200 40/215

* Heating Element comes on at 35°F outside ambient and compressor shuts off.

** AHAM Rating Conditions.

A good understanding of the basic operation of the refrigeration

system is essential for the service technician. Without this

understanding, accurate troubleshooting of refrigeration

system problems will be more difficult and time consuming, if

not (in some cases) entirely impossible. The refrigeration

system uses four basic principles (laws) in its operation they

are as follows:

1. "Heat always flows from a warmer body to a cooler body."

2. "Heat must be added to or removed from a substance

before a change in state can occur"

3. "Flow is always from a higher pressure area to a lower

pressure area."

4. "The temperature at which a liquid or gas changes state

is dependent upon the pressure."

The refrigeration cycle begins at the compressor. Starting

the compressor creates a low pressure in the suction line which

draws refrigerant gas (vapor) into the compressor. The

compressor then "compresses" this refrigerant, raising its

pressure and its (heat intensity) Temperature.

The refrigerant leaves the compressor through the discharge

line as a hot high pressure gas (vapor). The refrigerant enters

the condenser coil where it gives up some of its heat. The

condenser fan moving air across the coil's finned surface

facilitates the transfer of heat from the refrigerant to the

relatively cooler outdoor air.

When a sufficient quantity of heat has been removed from

the refrigerant gas (vapor), the refrigerant will "condense" (i.e.

change to a liquid). Once the refrigerant has been condensed

(changed) to a liquid it is cooled even further by the air that

continues to flow across the condenser coil.

The RAC design determines at exactly what point (in the

condenser) the change of state (i.e. gas to a liquid) takes place.

In all cases, however, the refrigerant must be totally condensed

(changed) to a liquid before leaving the condenser coil.

The refrigerant leaves the condenser coil through the liquid line

as a warm high pressure liquid. It next will pass through the

refrigerant drier (if so equipped). It is the function of the drier to

trap any moisture present in the system, contaminants, and large

particulate matter.

The liquid refrigerant next enters the metering device. The metering

device is a capillary tube. The purpose of the metering device is to

"meter" (i.e. control or measure) the quantity of refrigerant entering

the evaporator coil.

Refrigeration SystemRefrigeration System

Refrigeration System

Sequence of OperationSequence of Operation

Sequence of Operation

Liquid

Line

Suction

Line

Evaporator

Coil

Metering

Device

Refrigerant

Dryer

Discharge

Line

Refrigerant

Drier

Condenser

Coil

Compressor

In the case of the capillary tube this is accomplished (by design)

through size (and length) of device, and the pressure difference

present across the device.

Since the evaporator coil is under a lower pressure (due to the

suction created by the compressor) than the liquid line, the liquid

refrigerant leaves the metering device entering the evaporator coil.

As it enters the evaporator coil, the larger area and lower pressure

allows the refrigerant to expand and lower its temperature (heat

intensity). This expansion is often referred to as "boiling". Since

the unit's blower is moving Indoor air across the finned surface of

the evaporator coil, the expanding refrigerant absorbs some of

that heat. This results in a lowering of the indoor air temperature,

hence the "cooling" effect.

The expansion and absorbing of heat cause the liquid refrigerant

to evaporate (i.e. change to a gas). Once the refrigerant has

been evaporated (changed to a gas), it is heated even further by

the air that continues to flow across the evaporator coil.

The particular system design determines at exactly what point (in

the evaporator) the change of state (i.e. liquid to a gas) takes

place. In all cases, however, the refrigerant must be totally

evaporated (changed) to a gas before leaving the evaporator coil.

The low pressure (suction) created by the compressor causes the

refrigerant to leave the evaporator through the suction line as a

cool low pressure vapor. The refrigerant then returns to the

compressor, where the cycle is repeated.

Circuit Rating Plug Face Appearance

Model Breaker or T-D Fuse (NEMA#) (Facing Blades)

ALL SV and XQ MODELS,

KS10J10, KS12J10B, KS15J10, RS10J10, RS12J10A,

RS15J10, SS08J10R, SS09J10C, SS10J10AR,

SS12J10AR, SS14J10R, SC06H10D, 125V - 15A 5 - 15P

EQ08J11, YQ06J10B, YS09J10B

KS12J30B, KM18J30C, RS16J30A,

RM18J30A, SS12J30D, SS16J30A, SM18J30BR 250V - 15A 6 - 15P

KM20J30, KM24J30, SM20J30,

SL25J30, SL28J30B*, ES12J33B, 250V - 20A 6 - 20P

ES16J33A, YS12J33

SL35J30, EM18J34B, EL25J35, EL35J35,

YM18J34B, YL24J35C 250V - 30A 6 - 30P

* Optional 30 Amp Kit (618-869-00) is recommended in 208 Volt power supply areas that fall below 208 Volts.

For more information, call the Friedrich Service Department.

Due to a program of continuing improvement, specifications are subject to change without notice.

Installation Notes:

Supply Cord - All with right angle plug 6' on 115V; 5' on 230/208V.

Room air conditioners include accessories for window or thru-the-wall installation.

TWINTEMP® models include accessories for thru-the-wall installation only.

Window mounting requires use of optional accessory kit as listed below:

MODEL KIT NO.

EQ08J11, YQ06J10B WIKQ

ES12J33B, ES16J33A, WIKS

YS09J10B, YS12J33

EM18J34B, YM18J34B WIKM

EL25J35, EL35J35, WIKL

YL24J35C

Wire Size Use ONLY wiring size recommended for

single outlet branch circuit.

Fuse/Circuit Use ONLY type and size fuse or HACR

Breaker circuit breaker indicated on unit's rating

plate. Proper current protection to the unit

is the responsibility of the owner.

Grounding Unit MUST be grounded from branch circuit

through service cord to unit, or through

separate ground wire provided on permanently

connected units. Be sure that branch circuit

or general purpose outlet is grounded.

Receptacle The field supplied outlet must match plug on

service cord and be within reach of service

cord.

Do NOT alter the service cord or plug. Do

NOT use an extension cord. Refer to the table

above for proper receptacle and fuse type.

Electrical Rating TElectrical Rating T

Electrical Rating Tablesables

ablesables

ables

Electric shock hazard.

Turn off electric power before service or installation.

All electrical connections and wiring MUST be installed by a qualified

electrician and conform to the National Electrical Code and all local

codes which have jurisdiction.

Failure to do so can result in property damage, personal injury and/

or death.

The consumer - through the AHAM Room Air Conditioner

Certification Program - can be certain that the AHAM

Certification Seal accurately states the unit's cooling and

heating capacity rating, the amperes and the energy efficiency

ratio.

The overload is wired in series with the common motor

terminal. The overload senses both major amperage and

compressor temperature. High motor temperature or

amperage heats the disc causing it to open and break the

circuit to the common motor terminal.

COMPONENTS:

OPERATION & TESTING

WARNING

DISCONNECT ELECTRICAL POWER TO

UNIT BEFORE SERVICING OR TESTING

COMPRESSORS

Compressors are single phase, 115 or 230/208 volt,

depending on the model unit. All compressor motors are

permanent split capacitor type using only a running capacitor

across the start and run terminal.

All compressors are internally spring mounted and externally

mounted on rubber isolators.

WINDING TEST

Remove compressor terminal box cover and disconnect wires

from terminals. Using an ohmmeter, check continuity across

the following: (See Figure 1)

1. Terminal "C" and "S" - no continuity - open winding -

replace compressor.

2. Terminal "C" and "R" - no continuity - open winding -

replace compressor.

3. Terminal "R" and "S" - no continuity - open winding -

replace compressor.

GROUND TEST

Use an ohmmeter set on its highest scale. Touch one lead to

the compressor body (clean point of contact as a good con-

nection is a must) and the other probe in turn to each com-

pressor terminal (see Figure 2.) If a reading is obtained, the

compressor is grounded and must be replaced.

CHECKING COMPRESSOR EFFICIENCY

The reason for compressor inefficiency is normally due to broken

or damaged suction and/or discharge valves, reducing the ability

of the compressor to pump refrigerant gas.

This condition can be checked as follows:

1. Install a piercing valve on the suction and discharge or

liquid process tube.

2. Attach gauges to the high and low sides of the system.

3. Start the system and run a “cooling or heating

performance test.”

If test shows:

A. Below normal high side pressure

B. Above normal low side pressure

C. Low temperature difference across coil

The compressor valves are faulty - replace the

compressor.

THERMAL OVERLOAD (External)

Some compressors are equipped with an external overload

which is located in the compressor terminal box adjacent to

the compressor body (See Figure 3.)

Figure 1

Figure 3- External Overload

Figure 2

Typical Ground Test

1. With no power to unit, remove the leads from the com-

pressor terminals.

2. Using an ohmmeter, test continuity between terminals

C-S and C-R. If no continuity, the compressor overload

is open and the compressor must be replaced.

FAN MOTOR

A single phase permanent split capacitor motor is used to drive

the evaporator blower and condenser fan. A self-resetting over-

load is located inside the motor to protect against high tem-

perature and high amperage conditions. (See Figure 5)

CHECKING THE INTERNAL OVERLOAD

(See Figure 4)

Heat generated within the compressor shell is usually due to:

1. High amperage

2. Low refrigerant charge

3. Frequent recycling

4. Dirty condenser

TERMINAL OVERLOAD - TEST

(Compressor - External Type)

1. Remove overload.

2. Allow time for overload to reset before attempting to

test.

3. Apply ohmmeter probes to terminals on overload wires.

There should be continuity through the overload.

TERMINAL OVERLOAD (Internal)

Some model compressors are equipped with an internal

overload. The overload is embedded in the motor windings

to sense the winding temperature and/or current draw. The

overload is connected in series with the common motor

terminal.

Should the internal temperature and/or current draw become

excessive, the contacts in the overload will open, turning off

the compressor. The overload will automatically reset, but

may require several hours before the heat is dissipated.

Figure 4

Internal Overload

FAN MOTOR - TEST

1. Determine that capacitor is serviceable.

2. Disconnect fan motor wires from fan speed switch or

system switch.

3. Apply "live" test cord probes on black wire and common

terminal of capacitor. Motor should run at high speed.

4. Apply "live" test cord probes on red wire and common

terminal of capacitor. Motor should run at low speed.

5. Apply "live" test cord probes on each of the remaining

wires from the speed switch or system switch to test

intermediate speeds. If the control is in the

"MoneySaver" mode and the thermostat calls for

cooling, the fan will start - then stop after approximately

2 minutes; then the fan and compressor will start

together approximately 2 minutes later.

SYSTEM CONTROL PANEL- SQ Models (See Figure 6)

A five-position control switch is used to regulate the operation

of the fan motor and compressor. The compressor can be

operated with the fan operating at low, medium or high speed.

The fan motor can also be operated independently on medium

speed. See switch section as indicated on the decorative

control panel.

Figure 5

Fan Motor

Figure 6

System Control Panel (SQ Models Only)

MONEYSAVER® SWITCH (Rocker Switch- See Figure 8)

This rocker switch can be depressed to either YES or NO. In

the YES position you will get the most economical operation.

Both the fan and the compressor will cycle on and off together,

maintaining the selected temperature at a more constant level

and reducing the humidity more efficiently. This control will

only operate when the unit is in a cooling mode. In the NO

position, the fan will run constantly as long as the unit is in the

cooling mode. Disconnect leads from switch. Depress switch

to function being tested.

1. When YES is depressed, there should be continuity

between terminals "1" and "2."

2. When NO is depressed, there should be continuity

between terminals "2" and "3."

Figure 7

System Switch

(SQ Only)

Rocker Switch

Figure 8

Figure 9

System Control Panel (XQ Models Only)

SYSTEM CONTROL PANEL (XQ MODELS ONLY)

(See Figure 9)

1. Power button turns the unit on and off.

2. Fan Speed button allows selection between three cool-

ing speeds and fan only.

3. The mode button allows the unit to switch between modes

(i.e., fan only, cooling, etc.).

4. Timer on/off button allows for programmed on and off

times (one hour increments).

5. The plus and minus buttons allows adjustments for room

air temperature.

6. Set hour button enables the unit’s timer on/off feature to

operate for times selected.

7. Exhaust/vent shut feature (if applicable) allows for room

air to continuously recalculate or if enabled, to exhaust

stale air.

Note: Please refer the troubleshooting guides on page if the

control is malfunctioning.

SYSTEM CONTROL SWITCH - TEST (See Figure 7)

Disconnect the leads from the control switch. There must be

continuity as follows:

1. "Off" Position - no continuity between terminals.

2. "Lo Cool" Position - between terminals "L1" and "C", "Lo"

and MS".

3. "Med Cool" Position - between terminals "L1" and "C", "M"

and "MS".

4. "Hi Cool" Position - between terminals L1" and "C", "H"

and "MS".

5. "Fan Only" Position - between terminals "L1" and "2".

RESISTOR

(Heat Anticipator) (SQ Only)

Failure of the resistor will cause prolonged "off" and "on" cycles

of the unit. When replacing a resistor, be sure and use the

exact replacement. Resistor rating 115 Volts 12500 ohm, 1.05

watts.

SYSTEM CONTROL PANEL

("KQ" Models Only- See Figure 10)

The KQ Model unit uses a five position control switch to regu-

late the operation of the unit. Function of each position (clock-

wise rotation) is as follows:

SYSTEM CONTROL SWITCH - TEST (See Figure 11) Turn knob

to phase of switch to be tested. There must be continuity as fol-

lows:

1. "Hi Fan" Position - between terminals "L1" and "H".

2. "Low Fan" Position - between terminals "L1" and "L".

3. "Low Cool" Position - between terminals "L1" and "L" and

"C".

4. "Hi Cool" Position - between terminals "L1" and "H" and "C".

Figure 11

System Control Switch

(KQ Models Only)

1. "Off" - Turns everything off.

2. "Hi Fan" - Maximum circulation of filtered room air (no

cooling.)

3. "Low Fan" - Fan runs slower for less circulation of fil-

tered room air.

4. "Low Cool" - Fan runs slowly for quiet operation when

maximum cooling is not needed.

5. "Hi Cool" - Highest fan speed for maximum cooling.

Figure 10

System Control Panel (KQ Models Only)

SYSTEM CONTROL PANEL

EQ Model Only (See Figure 12 )

The EQ Model unit uses a six-position control switch to regulate

the operation of the unit. Function of each position (clockwise

rotation) is as follows:

1. “Off” Turns everything off.

2. “Fan Only” To circulate filtered room air, but no cooling

or heating

3. “Hi Cool” Fan runs continuously, compressor goes on

and off to maintain the selected room temperature

4. “Lo Cool” fan runs continuously, compressor goes on and

off to maintain the selected room temperature.

5. “Lo Heat” Fan runs continuously, heating turns on and

off to maintain the selected room temperature.

6. Hi Heat” Fan runs continuously, heating turns on and off

to maintain the selected room temperature.

SYSTEM CONTROL SWITCH – TEST (See Figure 13)

Turn knob to phase of switch to be tested. There must be

continuity as follows:

1. “Fan Only” Position – between terminals “MS” and “H”

2. “Hi Cool” Position – between terminals “L1” and “C” and

“MS” and “H”

3. “Low Cool” Position – between terminals “L1” and “C”

and “MS” and “LO”

4. “Low Heat” Position – between terminals “L2” and “2”

and “MS” and “LO”

5. “Hi Heat” Position – between terminals “L2” and “2” and

“MS” and “H”

Figure 12

System Control Panel (EQ Models only)

1. "Hi Cool" Turns on the compressor and fan at high speed

2. "Lo Cool" Turns on the compressor and fan at low speed.

3. "Fan Only" Turns on the fan at high speed.

4. "Off" Turns everything off.

The switching arrangement of the control is as follows:

(See Figure 17)

1. "Off" All contacts open.

2. "Hi Fan

Contacts closed between terminals "L1" and

"1".

3. "Hi Cool" Contacts closed between terminals "L1" to "1"

and "L1" and "C".

4. "Lo-Cool" Contacts are closed between terminals "L1"

to "2" and "L1 to "C".

SYSTEM CONTROL PANEL ("YQ" Model Only)

(See Figure 14)

The YQ Model unit uses a six position control switch to regulate

the operation of the unit. Function of each position (Clockwise

rotation) is as follows:

1. "Off" - Turns everything off.

2. "Fan Only" - To circulate filtered room air, but no cooling

or heating.

3. "Hi Cool" - Fan runs continuously, compressor goes on

and off to maintain the selected room temperature.

4. "Lo Cool" - Fan runs continuously, compressor goes on

and off to maintain the selected room temperature.

5. "Lo Heat" - Fan Runs continuously, heating turns on and

off to maintain the selected room temperature.

6. "Hi Heat" - Fan Runs continuously, heating turns on and

off to maintain the selected room temperature.

SYSTEM CONTROL SWITCH - TEST (See Figure 15)

Turn knob to phase of switch to be tested. There must be

continuity as follows:

1. "Fan Only" Position - between terminals "C" and "1".

2. "Hi Cool" Position - between terminals "C" and "1", "C"

and "3".

3. "Lo Cool" Position - between terminals "C" and "2", and

"C" and "3".

Figure 14

System Control Panel (YQ Model Only)

Figure 15

System Control Switch

(YQ Model Only)

Figure 13

System Control Switch

(EQ Models)

4. "Lo Heat" Position - between terminals "C" and "2", and

"C" and "4".

5. "Hi Heat" Position - between terminals "C" and "1", and

"C" and "4".

ROTARY (SYSTEM) SWITCH: "SC" Model (See Figure 16)

A rotary four position switch is used to turn on the unit and

select the operation desired. Switch selection is as follows:

Figure 16

System Control Panel (SC Model Only)

SYSTEM CONTROL SWITCH "WE" & "WY" Models

(See Figure 20)

An eight position switch is used to regulate the operation of

the fan motor, compressor and electric heater. The unit can

be operated in cooling or heating mode with the compressor

or electric heater on and the fan motor operating on low,

medium or high speed.

The fan motor can also be operated independently on medium

speed. See switch section as indicated on decorative control panel.

1. Disconnect leads from control switch.

2. Check continuity between all switch positions shown in

Figure 17.

SYSTEM CONTROL PANEL

"WS" Models (See Figure 18)

A five position control switch is used to regulate the operation

of the fan motor and compressor. The compressor can be

operated with the fan operating at low, medium or high speed.

The fan motor can also be operated independently on medium

speed. See switch section as indicated on decorative control

panel

Figure 16

System Control Switch

(SC Model Only)

Figure 18

System Control Panel (WS Models)

SYSTEM CONTROL SWITCH - TEST

Disconnect leads from control switch (See Figure 19)

There must be continuity as follows:

1. "Off" Position - no continuity between terminals.

2. "Lo Cool" Position - between terminals "L1" and "C", "LO"

and "MS."

3. "Med Cool" Position - between terminals "L1" and "C", "M"

and "MS".

4. "Hi Cool" Position - between terminals "L1" and C", "H"

and "MS."

5. "Fan Only" Position - between terminals "L1" and "2."

Figure 19

System Control Switch

(WS Models)

Figure 20

System Control Panel

(WE & WY Models)

SYSTEM CONTROL SWITCH - TEST (See Figure 21)

Disconnect leads from control switch. Turn control to position

being tested. There must be continuity as follows:

1. "Off" Position-no continuity between terminals.

2. "Lo Cool" Position-between terminals "C" and "3", "C2"

and "2", "LO" and "M/S", "AR" and "5".

3. "Med Cool" Position-between terminals "C" and "3",

"C2" and "2", "M" and "M/S", "AR" and "5".

4. "Hi Cool" Position-between terminals "C" and "3", "C2"

and "2", "H" and "M/S", "AR" and "5".

5. "Hi Heat" Position-between terminals "C" and "1", "C2"

and "4", "H" and "M/S", "AR" and "5".

SYSTEM CONTROL PANEL (See Figure 24)

A six-position control switch is used to regulate the operation of

the fan motor and compressor. The compressor can be operated

with the fan operating at low, medium or high speed. The fan

motor can also be operated independently on medium speed.

See switch section as indicated on decorative control panel.

SYSTEM CONTROL SWITCH KS, SS, KM, SM, SL Models

(See Figure 22)

A five position control switch is used to regulate the operation of

the fan motor and compressor. The compressor can be operated

with the fan operating at low, medium or high speed. The fan

motor can also be operated independently on medium speed.

See switch section as indicated on decorative control panel.

SYSTEM CONTROL SWITCH - TEST (See Figure 23)

Disconnect leads from control switch. There must be continuity

as follows:

1. "Off" Position - no continuity between terminals.

2. "Lo Cool" Position - between terminals "L1" and "C," "LO"

and "MS."

3. "Med Cool" Position - between terminals "L1" and "C,"

"M" and "MS."

4. "Hi Cool" Position - between terminals "L1" and "C,"

"H"and "MS."

5. "Fan Only" Position - between terminals "L1" and "2."

Figure 23

System Control Switch

Figure 24

System Control Panel - Deluxe Series (RS & RM)

Figure 21

System Control Switch

Heat Pump / Electric Heat

(WE & WY Models)

6. "Med Heat" Position-between terminals "C" and "1",

"C2" and "4", "M" and "M/S", "AR" and "5".

7. "Lo Cool" Position-between terminals "C" and "1", "C2"

and "4", "LO" and "M/S", "AR" and "5".

8. "Fan Only" Position-between terminals "L1" and "M".

Figure 22

System Control Panel (KS, SS, KM, SM, SL)

SYSTEM CONTROL SWITCH (See Figure 26)

(Heat Pump & Electric Heat Models)

An eight position control switch is used to regulate the

operation of the fan motor and compressor. The compressor

can be operated with the fan operating at low, medium or high

speed in the cooling or heating mode. The fan motor can also

be operated independently on medium speed. See switch

section as indicated on decorative control panel.

1. "Off" Position - everything is off.

2. "Lo Cool" Position - fan operates on low speed,

compressor is on.

3. "Med Cool" Position - fan operates on medium speed,

compressor is on.

4. "Hi Cool" Position - fan operates on high speed,

compressor is on.

5. "Hi Heat" Position - fan operates on high speed,

compressor or electric heater is on.

6. "Med Heat" Position - fan operates on medium speed,

compressor or electric heater is on.

SYSTEM CONTROL SWITCH - TEST

Disconnect leads from control switch (See Figure 25)

There must be continuity as follows:

Figure 25

Figure 26

System Control Switch

SYSTEM CONTROL SWITCH

(Heat Pump & Electric Heat Models) (See Figure 27)

An eight position control switch is used to regulate the

operation of the fan motor and compressor. The compressor

can be operated with the fan operating at low, medium or high

speed in the cooling or heating mode. The fan motor can also

be operated independently on medium speed. See switch

section as indicated on decorative control panel.

1. "Off" Position - everything is off.

2. "Lo Cool" Position - fan operates on low speed,

compressor is on.

3. "Med Cool" Position - fan operates on medium speed,

compressor is on.

4. "Hi Cool" Position - fan operates on high speed,

compressor is on.

5. "Hi Heat" Position - fan operates on high speed,

compressor or electric heater is on.

6. "Med Heat" Position - fan operates on medium speed,

compressor or electric heater is on.

7. "Lo Heat" Position - fan operates on low speed,

compressor or electric heater is on.

8. "Fan Only" Position - operates on medium speed.

NOTE: Heat pump models with electric heat - in the heat

position, heating element only will be energized when outdoor

temperature is below the operating range of the heat pump.

Figure 27

System Control Panel

Heat Pump & Electric Heat Models

(YS, ES, YM, EM, YL & EL)

Smart Center Electronic Control Center

(See Figure 29)

FILTER ALERT light will come on after 250 hours of use. Touch

FILTER ALERT to reset.

TO SET MODE OF OPERATION

When unit is first turned on, it will be in the COOL mode (light

on), with constant fan.

Touch MONEYSAVER (light on) to activate the MoneySaver

feature. (MoneySaver is a feature that cycles the fan with the

compressor so that the fan does not run all the time. This

saves energy and improves dehumidification.) If customer

prefers a constant fan for more air movement, touch

MONEYSAVER again and unit will return to constant fan.

Touch FAN ONLY (light on) and only the fan will run. This

feature may be used in conjunction with the FRESH AIR/

EXHAUST lever to bring outside air into a room, or to exhaust

stale air.

SYSTEM CONTROL SWITCH - TEST (See Figure 28)

Disconnect leads from control switch. Turn control to position

being tested. There must be continuity as follows:

1. "Off" Position - no continuity between terminals.

2. "Lo Cool" Position - between terminals "C" and "3", "C2"

and "2", "LO" and "M/S", "AR" and "5".

3. "Med Cool" Position - between terminals "C" and "3", "C2"

and "2", "M" and "M/S", "AR" and "5".

4. "Hi Cool" Position - between terminals "C" and "3", "C2"

and "2", "H" and "M/S", "AR" and "5".

5. "Hi Heat" Position - between terminals "C" and "1", "C2"

and "4", "H" and "M/S", "AR" and "5".

6. "Med Heat" Position - between terminals "C" and "1", "C2"

and "4", "M" and "M/S", "AR" and "5".

7. "Lo Cool" Position - between terminals "C" and "1", "C2"

and "4", "LO" and "M/S", "AR" and "5".

8. "Fan Only" Position - between terminals "L1" and "M".

Figure 28

System Control Switch

(Heat Pump / Electric

Heat Models

TO ADJUST TEMPERATURE

COOLER - Touch COOLER to see setting, touch again to

change.

WARMER - Touch WARMER to see setting, touch again to

change.

Touch °F/°C to show desired temperature in Fahrenheit or

Celsius.

TO ADJUST FAN SPEED

Touch SPEED to see current setting. Touch again to change

speed. F1 is lowest setting (sleep setting), F2 is LOW, F3 is

MED, and F4 is HIGH.

TO ACTIVATE SMART FAN

Touch SMART FAN (light on). Smart Fan will adjust the fan

speed automatically to maintain the desired comfort level. For

example, if the outside doors in the home are open for an

extended period of time, or more people enter a room, Smart

Fan may adjust to a higher fan speed to compensate for the

increased heat load. This keeps from having to adjust the fan

speed on your own, or from having to change the desired

temperature you have selected. Smart Fan will also run to

test temperature if the off cycle is long.

Figure 29

Electronic Control

TO SET HOUR CLOCK

Touch SET HOUR CLOCK to see setting. To change, touch

and hold until hour closest to the actual time appears in the

display. MAKE SURE A.M. AND P.M. ARE SET PROPERLY.

(Minutes will NOT show on display.)

TO SET THE TIMER

NOTE: SET HOUR CLOCK before attempting to set timer

functions.

The TIMER ON/OFF times can be set a minimum of one

hour apart and a maximum of twenty-three hours apart.

STOP TIME - Touch A/C STOP and hold until the hour the

unit needs to shut off appears in the display A.M. or P.M.)

START TIME - Touch A/C START and hold until the hour the

unit needs to come on appears in the display (A.M. or P.M.)

Touch TIMER ON (light on) to activate the timer function. Touch

TIMER OFF (light off) to cancel the timer function desired.

Once the on and off times have been selected, they will remain

in memory, and cycle daily until changed, or until the unit is

subject to a power interruption.

TESTING THE ELECTRONIC CONTROL

2003 XQ BOARDS & QME BOARDS

Checking Room Temperature:

1. Check the room temperature at the electronic control pad

by pressing the "FAN SPEED" button and the temperature

"UP" button at the same time on XQ models.

2. Check the room temperature at the electronic control pad

by pressing at the same time the "FAN SPEED" button

and the "WARMER" button on QME models.

The indoor temperature will display for 10 seconds. Indoor

temperature can be viewed in all modes, including the TEST

mode. The display can be changed back to SET

temperature by pressing any key, except the ON/OFF

button, or after 10 seconds has elapsed.

Activating Test Mode: Activate test mode by pressing at

the same time the "MODE" button and the temperature

"DOWN" button on XQ models. LEDs for Hour, Start, and

Stop will blink 1 bps while Test Mode is active.

Activate test mode by pressing at the same time the

"MONEY SAVER" button and the "FILTER ALERT" button

on QME models. LED for the Filter Alert will blink 1 bps

while Test Mode is active.

Test Mode has duration of 90 minutes. Test Mode can be

activated under any conditions, including Off. Test Mode is

cancelled by pressing the On/Off button, unplugging the

unit, or when the 90 minutes is timed out. All settings revert

to the factory default settings of Cool, 75 degrees F, Timer

and Set Hour features are nonfunctional.

Test Mode overrides the three-minute lockout, all delays

for compressor and fan motor start / speed change, and no

delay when switching modes.

Test Mode default settings are ON, Money Saver, 60 degrees F,

and High fan speed

Activating Error Code Mode: (Submode of Test Mode) Unit

has to be in Test Mode to enter Error Code Mode

1. Activate Error Code Mode by pressing the "TIMER ON/

OFF" button on XQ models. LED for the "TIMER ON/OFF"

will flash 1 bps while Error Code Mode is active. Pressing

the "TEMP/HR + " button will display 00. Consecutive

presses will scroll through all error codes logged. Press

the "TEMP/HR - " button to see the reverse order of all

error codes logged. When the end of logged error codes is

reached the temperature set point will appear.

Activate Error Code Mode by pressing at the same time

the "A/C START" button and the "ON/OFF" button on QME

models. LED for the "TIMER ON/OFF" will flash 1 bps while

Error Code Mode is active. Pressing the "WARMER" button

will display 00. Consecutive presses will scroll through all

error codes logged. Press the "COOLER" button to see

the reverse order of all error codes logged. When the end

of logged error codes is reached the temperature set point

will appear.

IMPORTANT: Error Codes are cleared from the log

by exiting from Error Code Mode. To exit on XQ mod-

els, press Timer On/Off button. To exit QME models,

press A/C Start and On/Off buttons. Or unplug unit to

exit Error Code Mode. Plug unit in after 5 seconds to

resume normal operation of unit.

TESTING THE ELECTRONIC CONTROL

ERROR CODE LISTINGS

E1 SHORT CYCLE SITUATION: Defined as (compressor

powered on before the three minute time delay ten times in

one hour. Investigate and correct short cycling problem.

E2 KEYBOARD STUCK ERROR: If key button(s) are pressed

continuously for twenty seconds or more. If MODE key is stuck,

unit will default to cool. Exit Error Code Mode to see if error

"E2" is no longer displayed and unit is functioning. Replace

board if "E2" still displays after exiting Error Code Mode.

E3 FROST PROBE OPEN: Normal operation is allowed. Ohm

frost probe. Replace probe if ohm value not read. If ohm value

present replace board.

E4 FROST PROBE SHORT: Normal operation allowed.

Replace probe.

E5 INDOOR PROBE OPEN: Control assumes indoor ambient

temperature is 90 degree F and unit will operate. Ohm indoor

probe. Replace probe if ohm value not read.

E6 INDOOR PROBE SHORT: Control assumes ambient

temperature is 90 degree F and unit will operate. Replace

probe.

NOTE: All Error Code displays for Frost & Indoor Probe will

allow unit to operate. Unit may or will ice up if faulty components

not replaced.

FROST PROBE SENSOR: disables compressor at 35

degrees F.

INDOOR PROBE SENSOR: Control range is 60 degrees F

to 90 degrees F +/- 2 degrees F.

Indoor temperature will be displayed by pressing:

THERMOSTAT - Models ES, YS, EM, YM, EL, YL

(See Figure 32)

A cross ambient thermostat is used on all heat pump and

electric heat units. In addition to cycling the unit in a heating

or cooling operation, the thermostat will terminate the cooling

cycle in the event ice forms on the evaporator coil, in this

case the thermostat functions as a de-ice control. A resistor

(anticipator) is positioned within a plastic block to supply a

small amount of heat to the bulb area to prevent long "off

cycles" in the "Cool-Fan Auto" (MoneySaver) position (see

Figure 8.) A current feedback through the fan motor windings

during "off cycle" completes the circuit to the resistor.

TEST:

1. Remove leads from thermostat.

2. Turn thermostat knob clockwise to its coldest position.

3. Test for continuity between the two terminals. Contacts

should be closed.

4. Turn thermostat knob counterclockwise to its warmest

position.

5. Test for continuity - contacts should be open.

NOTE: The thermostat must be within the temperature

range listed to open and close.

THERMOSTAT ("YQ" Model Only) (See Figure 31)

This thermostat is single pole-double throw, cross ambient

with a range of 60° to 92°F and a differential of ±2°F. Terminal

"2" is common.

THERMOSTAT ("SQ & KQ" Models) - See Figure 30.

Thermostat is used to cycle the compressor on and off at the

comfort level desired. The thermostat has a range from 60°

±2°F to 90° ±4°F, with a differential of 5°F. Turning the knob

clockwise lowers the indoor room temperature setting, while

turning the knob counter clockwise raises the indoor

temperature.

TEST:

Remove wires, turn thermostat to its coldest position. Check

for continuity between the two terminals. Turn thermostat to

warmest position, check continuity to see if contacts open.

NOTE: Temperature must be in range listed to check

thermostat.

To maintain the comfort level desired, a cross ambient type

thermostat is used. The thermostat has a range from 65° ±2°F

to 87° ±3°F. The thermostat bulb is positioned in front of the

evaporator coil to sense the return air temperature. Thermo-

stat malfunction or erratic operation is covered in the trouble-

shooting section of this manual.

TEST:

1. Remove leads from thermostat.

2. Turn thermostat knob clockwise to its coldest position.

3. Test for continuity between the two terminals. Contacts

should be closed.

4. Turn thermostat knob counterclockwise to its warmest

position.

5. Test for continuity - contacts should be open.

NOTE: The thermostat must be within the temperature range

listed to open and close.

Figure 30

Thermostat

(QME Units) The Fan Speed button and the Warmer button.

( XQ Units) The Fan Speed button and the Temp Up button.

The indoor temperature will be displayed for 10 seconds. The

display will change back to the Set Point temperature by

pressing any key button except for the On/Off button. The

indoor temperature can be viewed in all modes, including test

mode.

Filter Alert: The Filter Alert indicator turns on after the fan

motor has been operating for 250 hours. The Filter Alert

indicator is reset by pressing the Filter Alert button one time

only,. Power failures will not reset the 250 hour timer. All time

elapsed is stored in memory and resumes counting after power

is restored.

Keep Alive: The electronic control has a memory to retain all

functions and status as set up by the user in the event of a

power failure. Once power is restored to the unit there is a

two second delay before the fan comes on and approximately

three minutes delay before the compressor is activated,

providing that the mode was set for cooling and the set point

temperature has not been met in the room.

Figure 31

Thermostat

(YQ Models Only)

DEFROST THERMOSTAT (Heat Pump Models Only)

(See Figure 35)

This thermostat is single pole - double throw with contacts

between terminals "2" and "3" closing on temperature rise

and contacts between terminals "2" and "1" closing on

temperature fall. When the contacts between terminals "2"

and "1" make, power is supplied to the heater element.

This control is dual purpose control that acts as an outdoor

thermostat and defrost control.

When the sensing bulb, attached to the condenser coil, senses

enough icing on the outdoor coil, it will interrupt power to the

compressor and supply power to the heating element until

the coil temperature reaches above 43°, then the heater will

shut off and the unit will resume operating in the reverse cycle

mode.

When the outdoor coil temperature drops below 20°, the unit

will operate in electric heat mode continuously until the outdoor

coil temperature rises above 43°.

The fan motor will not turn off when defrost occurs, and the 4-

way valve will not reverse.

Figure 32

Thermostat

In the heating cycle, the heat anticipator is energized to supply

a small amount of heat during the "on" cycle. This will open

the contacts in the thermostat prematurely to maintain a closer

differential between the "cut in" and "cut out" temperature.

The heat anticipator is energized in the heating mode

regardless of whether fan is placed in the automatic

(MoneySaver) or constant run position.

RANGE: Cooling Model Thermostat

60°F (±2°) to 92°F (±4°),

TEST:

Cooling/Heating Models: Remove wires from thermostat

and check continuity between terminal "2" (common) and "3"

for cooling. Check between terminals "2" (common) and "1"

for heating. Also check that contacts in thermostat open after

placing in either position. NOTE: Temperature must be within

range listed to check thermostat. Refer to the troubleshooting

section in this manual for additional information on thermostat

testing.

THERMOSTAT ADJUSTMENT

No attempt should be made to adjust thermostat. Due to the

sensitivity of the internal mechanism and the sophisticated

equipment required to check the calibration, it is suggested

that the thermostat be replaced rather than calibrated.

Thermostat bulb must be straight to insure proper

performance.

THERMOSTAT BULB LOCATION

The position of the bulb is important in order for the thermostat

to function properly. The bulb of the thermostat should be

located approximately 45° to a maximum of 60° from

horizontal. Also, do not allow the thermostat bulb to touch the

evaporator coil. (See Figures 33 and 34)

Thermostat sensor holder

020 to be positioned between

the 4th and 5th and 6th and

7th rows of tubes from the

bottom of the coil at

dimension shown

Figure 34

Thermostat Bulb Location

(KQ, YQ & SC Models Only)

Thermostat sensor holder

020 and anticipator

(4712D-140) to be

positioned between the

4th and 5th and 6th and

7th rows of tubes from

the bottom of the coil at

dimension shown

Figure 33

Thermostat Bulb Location

(SQ Models Only)

Figure 35

Defrost Thermostat

(Heat Pump Models)

CAPACITOR, RUN (See Figure 38)

A run capacitor is wired across the auxiliary and main winding

of a single phase permanent split capacitor motor such as the

compressor and fan motor. A single capacitor can be used for

each motor or a dual rated capacitor can be used for both.

The capacitor's primary function is to reduce the line current

while greatly improving the torque characteristics of a motor.

The capacitor also reduces the line current to the motor by

improving the power factor of the load. The line side of the

capacitor is marked with a red dot and is wired to the line side

of the circuit.

DEFROST BULB LOCATION (Heat Pump Models Only)

(See Figure 36)

The defrost control bulb must be mounted securely and in the

correct location to operate properly.

RESISTOR: Heat Anticipator (See Figure 37)

Failure of the resistor will cause prolonged "off" and "on" cycles

of the unit. When replacing a resistor, be sure and use the

exact replacement. Resistor ratings are as follows:

115 Volt - 5,000 ohms 3 watt

230 Volt - 20,000 ohms 3 watt

Figure 37

Resistor

Slide the bulb

end of the

thermostat

defrost under

the retainer as

shown

Retainer

Figure 36

Defrost Thermostat Bulb

Location (All Heat Pump Models)

CAPACITOR - TEST

1. Remove capacitor from unit.

2. Check for visual damage such as bulges, cracks, or leaks.

3. For dual rated, apply an ohmmeter lead to common

(HERM) terminal. A satisfactory capacitor will cause a

deflection on the pointer, then gradually move back to

infinity.

4. Reverse the leads of the probe and momentarily touch

the capacitor terminals. The deflection of the pointer

should be two times that of the first check if the capacitor

is good.

5. Repeat steps 3 and 4 to check fan motor capacitor.

NOTE: A shorted capacitor will indicate a low resistance and

the pointer will move to the "0" end of the scale and remain

there as long as the probes are connected.

An open capacitor will show no movement of the pointer when

placed across the terminals of the capacitor.

Figure 38

Dual Rated Run Capacitor Hook-up

CHECK VALVE (See Figure 39)

A unique two-way check valve is used on the reverse cycle

heat pumps. It is pressure operated and used to direct the

flow of refrigerant through a single filter drier and to the proper

capillary tube during either the heating or cooling cycle

NOTE: The slide (check) inside the valve is made of teflon.

Should it become necessary to replace the check valve, place a

wet cloth around the valve to prevent overheating during the

brazing operation.

CHECK VALVE OPERATION

In the cooling mode of operation, high pressure liquid enters the

check valve forcing the slide to close the opposite port (liquid

line) to the indoor coil. Refer to refrigerant flow chart. This directs

the refrigerant through the filter drier and cooling capillary tube

to the indoor coil.

In the heating mode of operation, high pressure refrigerant enters

the check valve from the opposite direction, closing the port (liquid

line) to the outdoor coil. The flow path of the refrigerant is then

through the filter drier and heating capillary to the outdoor coil.

Failure of the slide in the check valve to seat properly in either

mode of operation will cause flooding of the cooling coil. This is

due to the refrigerant bypassing the heating or cooling capillary

tube and entering the liquid line.

COOLING MODE (See Figure 40)

In the cooling mode of operation, liquid refrigerant from con-

denser (liquid line) enters the cooling check valve forcing the

heating check valve shut. The liquid refrigerant is directed

into the liquid dryer after which the refrigerant is metered

through cooling capillary tubes to evaporator. (Note: liquid

refrigerant will also be directed through the heating capillary

tubes in a continuous loop during the cooling mode).

HEAT PUMPS: REVERSING VALVE (See Figure 42)

A reversing valve is used to change the refrigerant flow within

the system to permit heating or cooling.

The reversing valve consists of a main valve body which houses

the slide and piston, plus a pilot valve which is activated by a

solenoid.

(TO INDOOR COIL) (TO OUTDOOR COIL)

Figure 41

HEATING MODE (see Figure 41)

In the heating mode of operation, liquid refrigerant from the

indoor coil enters the heating check valve forcing the cooling

check valve shut. The liquid refrigerant is directed into the

liquid dryer after which the refrigerant is metered through the

heating capillary tubes to outdoor coils. (Note: liquid refriger-

ant will also be directed through the cooling capillary tubes in

a continuous loop during the heating mode).

(TO INDOOR COIL) (TO OUTDOOR COIL)

Figure 40

Figure 39

One-way Check Valve

(Heat Pump Models)

TESTING REVERSING VALVE

Occasionally, the reversing valve may stick in the heating or

cooling position or in the mid-position.

When stuck in the mid-position, part of the discharge gas from

the compressor is directed back to the suction side, resulting

in excessively high suction pressure.

Check the operation of the valve by starting the system and

switching the operation from "Cooling" to "Heating" and then

back to "Cooling". Do not hammer on valve.

If valve fails to change its position, test the voltage to the valve

coil while the system is in the heating cycle. If voltage to coil is

satisfactory, replace reversing valve.

Should the valve fail to shift from cooling to heating, block the

air flow through the outdoor coil and allow the discharge

pressure to build in the system. Then switch the system from

heating to cooling.

If the valve is stuck in the heating position, block the air flow

through the indoor coil and allow discharge pressure to build

in the system. Then switch the system from heating to cooling.

Should the valve fail to shift in either position after increasing

the discharge pressure, replace the valve.

NOTE: When brazing a reversing valve into the system, it is

of extreme importance that the temperature of the valve does

not exceed 250° F at any time.

Wrap the reversing valve with a large rag saturated with water.

"Re-wet" the rag and thoroughly cool the valve after each

brazing operation of the four joints involved.

The wet rag around the reversing valve will eliminate

conduction of heat to the valve body when brazing the line

connection.

SOLENOID COIL (Heat Pump Models Only)

(See Figure 42)

The solenoid coil is an electromagnetic type coil mounted on

the reversing valve and is energized during the operation of

the compressor in the heating cycle.

Should the reversing valve fail to shift during the heating cycle,

test the solenoid coil.

TO TEST:

1. Disconnect power to unit.

2. Disconnect coil leads.

3. Attach probes of an ohmmeter to each coil lead and check

for continuity.

NOTE: Do not start unit with solenoid coil removed from

valve, or do not remove coil after unit is in operation.

This will cause the coil to burn out.

There are three tubes connected to one side of the main

valve body and one tube on the opposite side. The single

tube is connected to the compressor discharge line. The

center tube on the opposite side is the common suction line

to the compressor. The outside tubes are connected to the

indoor and outdoor coils.

The pivot valve is responsible for directing the refrigerant

flow to the indoor or outdoor coil. There are three small tubes

connected to the pilot valve body. The center pilot tube is the

common pilot tube and is connected to the center suction

line. The outside tubes are connected to each end of the

main valve body. The pilot valve consists of a needle valve

and spring.

When the solenoid is de-energized, the spring tension closes

one pilot port while the other remains open. When the

solenoid is energized, the opposite end is closed. The piston

in the main valve is pressure operated and will always travel

in the direction of the open pilot tube port which provides a

path to the center tube. Pressure which will increase in the

opposite side of the valve will escape through a bleed port

located in each piston. When de-energized, the valve will be

in the cooling position.

Figure 42

Reversing Valve

Figure 43

Bellows Assembly

Drain Pan Valve

HEATING ELEMENT (See Figure 44)

All heat pumps and electric heat models are equipped with a

heating element with the exception of the YS09J10. The "YS",

"ES" and "EK12" models are equipped with a 3.3 KW element.

The "YM", "EM" and "EK18" models are equipped with a 4.0

KW element. The "YL" and "EL" models are equipped with a

5.2 KW element.

The heating element contains a fuse link and a heater limit

switch. The fuse link is in series with the power supply and will

open and interrupt the power when the temperature reaches

161.6°F, or a short circuit occurs in the heating element. Once

the fuse link separates, a new fuse link must be installed.

NOTE: Always replace with the exact replacement.

The heater element has a high limit control. This control is a

bimetal thermostat mounted in the top of the heating element.

Should the fan motor fail or filter become clogged, the high

limit control will open and interrupt power to the heater before

reaching an unsafe temperature condition.

The control is designed to open at 110°F ±6°F. Test continuity

below 110°F and for open above 110°F.

The heating element for the "Y" model is energized by an

outdoor thermostat. The outdoor thermostat is adjusted at a

predetermined temperature to bring on the heating element

and turn off the compressor. The room thermostat will then

control the cycling of the element when the selected indoor

temperature is reached.

Testing of the elements can be made with an ohmmeter across

the terminals after the connecting wires have been removed.

A cold resistance reading of approximately 14.5 ohms for the

3.3 KW heater, 11.9 ohms for the 4.0 KW heater and 9.15

ohms for the 5.2 KW heater should be registered.

SEALED REFRIGERATION SYSTEM REPAIRS

IMPORTANT

ANY SEALED SYSTEM REPAIRS TO HEAT PUMP

MODELS REQUIRES THE INSTALLATION OF A

SUCTION LINE DRIER IN THE SUCTION LINE

BETWEEN THE EVAPORATOR AND THE REVERSING

VALVE.

EQUIPMENT REQUIRED

1. Voltmeter

2. Ammeter

3. Ohmmeter

4. E.P.A. Approved Refrigerant Recovery System.

5. Vacuum Pump (capable of 200 microns or less vacuum.)

6. Acetylene Welder

7. Electronic Halogen Leak Detector (G.E. Type H-6 or

equivalent.)

8. Accurate refrigerant charge measuring device such as:

a. Balance Scales - 1/2 oz. accuracy

b. Charging Board - 1/2 oz. accuracy

9. High Pressure Gauge - (0 - 400 lbs.)

10. Low Pressure Gauge - (30 - 150 lbs.)

11. Vacuum Gauge - (0 - 1000 microns)

VALVE, DRAIN PAN (See Figure 43)

During the cooling mode of operation, condensate which

collects in the drain pan is picked up by the condenser fan

blade and sprayed onto the condenser coil. This assists in

cooling the refrigerant plus evaporating the water.

During the heating mode of operation, it is necessary that

water be removed to prevent it from freezing during cold

outside temperatures. This could cause the condenser fan

blade to freeze in the accumulated water and prevent it from

turning.

To provide a means of draining this water, a bellows type

drain valve is installed over a drain opening in the base pan.

This valve is temperature sensitive and will open when the

outside temperature reaches 40°F. The valve will close

gradually as the temperature rises above 40°F to fully close

at 60°F.

Figure 44 - Heating Element

HERMETIC COMPONENT REPLACEMENT

The following procedure applies when replacing components

in the sealed refrigeration circuit or repairing refrigerant leaks.

(Compressor, condenser, evaporator, capillary tube, refrigerant

leaks, etc.)

1. Recover the refrigerant from the system at the process

tube located on the high side of the system by installing

a line tap on the process tube. Apply gauge from process

tube to EPA approved gauges from process tube to

EPA approved recovery system. Recover CFC's in

system to at least 5%.

2. Cut the process tube below pinch off on the suction

side of the compressor.

3. Connect the line from the nitrogen tank to the suction

process tube.

4. Drift dry nitrogen through the system and un-solder the

more distant connection first. (Filter drier, high side

process tube, etc.)

5. Replace inoperative component, and always install a

new filter drier. Drift dry nitrogen through the system

when making these connections.

6. Pressurize system to 30 PSIG with proper refrigerant

and boost refrigerant pressure to 150 PSIG with dry

nitrogen.

7. Leak test complete system with electric halogen leak

detector, correcting any leaks found.

8. Reduce the system to zero gauge pressure.

9. Connect vacuum pump to high side and low side of

system with deep vacuum hoses, or copper tubing. (Do

not use regular hoses.)

10. Evacuate system to maximum absolute holding

pressure of 200 microns or less. NOTE: This process

can be speeded up by use of heat lamps, or by breaking

the vacuum with refrigerant or dry nitrogen at 5,000

EQUIPMENT MUST BE CAPABLE OF:

1. Recovery CFC's as low as 5%.

2. Evacuation from both the high side and low side of the

system simultaneously.

3. Introducing refrigerant charge into high side of the sys-

tem.

4. Accurately weighing the refrigerant charge actually in-

troduced into the system.

5. Facilities for flowing nitrogen through refrigeration tub-

ing during all brazing processes.

microns. Pressure system to 5 PSIG and leave in

system a minimum of 10 minutes. Release refrigerant,

and proceed with evacuation of a pressure of 200

microns or less.

11. Break vacuum by charging system from the high side

with the correct amount of refrigerant specified. This

will prevent boiling the oil out of the crankcase.

NOTE: If the entire charge will not enter the high side,

allow the remainder to enter the low side in

small increments while operating the unit.

12. Restart unit several times after allowing pressures to

stabilize. Pinch off process tubes, cut and solder the

ends. Remove pinch off tool, and leak check the

process tube ends.

SPECIAL PROCEDURE IN THE CASE OF

COMPRESSOR MOTOR BURNOUT

1. Recover all refrigerant and oil from the system.

2. Remove compressor, capillary tube and filter drier

from the system.

3. Flush evaporator condenser and all connecting tubing

with dry nitrogen or equivalent, to remove all

contamination from system. Inspect suction and

discharge line for carbon deposits. Remove and clean

if necessary.

4. Reassemble the system, including new drier strainer

and capillary tube.

5. Proceed with processing as outlined under hermetic

component replacement.

ROTARY COMPRESSOR SPECIAL

TROUBLESHOOTING AND SERVICE

Basically, troubleshooting and servicing rotary compressors

is the same as on the reciprocating compressor with only a

few exceptions.

1. Because of the spinning motion of the rotary, the

mounts are critical. If vibration is present, check the

mounts carefully.

2. The electrical terminals on the rotary are in a different

order than the reciprocating compressors. The

terminal markings are on the cover gasket. Use your

wiring diagram to insure correct connections.

REFRIGERANT CHARGING

NOTE: BECAUSE THE RAC SYSTEM IS A SEALED

SYSTEM, SERVICE PROCESS TUBES WILL HAVE TO

BE INSTALLED. FIRST INSTALL A LINE TAP AND

REMOVE REFRIGERANT FROM SYSTEM. MAKE

NECESSARY SEALED SYSTEM REPAIRS AND

VACUUM SYSTEM. CRIMP PROCESS TUBE LINE AND

SOLDER END SHUT. DO NOT LEAVE A SERVICE

VALVE IN THE SEALED SYSTEM.

NOTE: In order to access the sealed system it will be necessary to install Schrader type fittings to the process

tubes on the discharge and suction of the compressor. Proper recovery refrigerant procedures need to be adhered

to as outlined in EPA Regulations. THIS SHOULD ONLY BE ATTEMPTED BY QUALIFIED SERVICE PERSONNEL.

An undercharged system will result in poor performance (low

pressures, etc.) in both the heating and cooling cycle.

Whenever you service a unit with an undercharge of

refrigerant, always suspect a leak. The leak must be repaired

before charging the unit.

To check for an undercharged system, turn the unit on, allow

the compressor to run long enough to establish working

pressures in the system (15 to 20 minutes).

During the cooling cycle you can listen carefully at the exit of

the metering device into the evaporator; an intermittent hissing

and gurgling sound indicates a low refrigerant charge.

Intermittent frosting and thawing of the evaporator is another

indication of a low charge, however, frosting and thawing can

also be caused by insufficient air over the evaporator.

Checks for an undercharged system can be made at the

compressor . If the compressor seems quieter than normal, it

is an indication of a low refrigerant charge. A check of the

amperage drawn by the compressor motor should show a

lower reading. (Check the Unit Specification.) After the unit

has run 10 to 15 minutes, check the gauge pressures.

Gauges connected to system with an undercharge will have

low head pressures and substantially low suction pressures.

Undercharged Refrigerant Systems

Proper refrigerant charge is essential to proper unit

operation. Operating a unit with an improper refrigerant

charge will result in reduced performance (capacity) and/or

efficiency. Accordingly, the use of proper charging methods

during servicing will insure that the unit is functioning as

designed and that its compressor will not be damaged.

Too much refrigerant (overcharge) in the system is just as

bad (if not worse) than not enough refrigerant

(undercharge). They both can be the source of certain

compressor failures if they remain uncorrected for any

period of time. Quite often, other problems (such as low air

flow across evaporator, etc.) are misdiagnosed as

refrigerant charge problems. The refrigerant circuit

diagnosis chart will assist you in properly diagnosing these

systems.

An overcharged unit will at times return liquid refrigerant

(slugging) back to the suction side of the compressor

eventually causing a mechanical failure within the compressor.

This mechanical failure can manifest itself as valve failure,

bearing failure, and/or other mechanical failure. The specific

type of failure will be influenced by the amount of liquid being

returned, and the length of time the slugging continues.

Not enough refrigerant (Undercharge) on the other hand, will

cause the temperature of the suction gas to increase to the

point where it does not provide sufficient cooling for the

compressor motor. When this occurs, the motor winding

temperature will increase causing the motor to overheat and

possibly cycle open the compressor overload protector.

Continued overheating of the motor windings and/or cycling

of the overload will eventually lead to compressor motor or

overload failure.

METHOD OF CHARGING

The acceptable method for charging the RAC system is the

Weighed in Charge Method. The weighed in charge method

is applicable to all units. It is the preferred method to use, as

it is the most accurate.

The weighed in method should always be used whenever a

charge is removed from a unit such as for a leak repair,

compressor replacement, or when there is no refrigerant

charge left in the unit. To charge by this method, requires the

following steps:

1. Install a piercing valve to remove refrigerant from the

sealed system. (Piercing valve must be removed from

the system before recharging.)

2. Recover Refrigerant in accordance with EPA regulations.

3. Install a process tube to sealed system.

4. Make necessary repairs to system.

5. Evacuate system to 250 - 300 microns or less.

6. Weigh in refrigerant with the property quantity of R-22

refrigerant.

7. Start unit, and verify performance.

8. Crimp the process tube and solder the end shut.

Overcharged Refrigerant Systems

Compressor amps will be near normal or higher.

Noncondensables can also cause these symptoms. To

confirm, remove some of the charge, if conditions improve,

system may be overcharged. If conditions don’t improve,

Noncondensables are indicated.

Whenever an overcharged system is indicated, always make

sure that the problem is not caused by air flow problems.

Improper air flow over the evaporator coil may indicate some

of the same symptoms as an overcharged system.

An over charge can cause the compressor to fail, since it would

be "slugged" with liquid refrigerant.

The charge for any system is critical. When the compressor

is noisy, suspect an overcharge, when you are sure that the

air quantity over the evaporator coil is correct. Icing of the

evaporator will not be encountered because the refrigerant

will boil later if at all. Gauges connected to system will usually

have higher head pressure (depending upon amount of

overcharge). Suction pressure should be slightly higher.

NOTE: Heat pump

refrigeration

drawing

A quick check for either condition begins at the evaporator.

With a partial restriction, there may be gurgling sounds at the

metering device entrance to the evaporator. The evaporator

in a partial restriction could be partially frosted or have an ice

ball close to the entrance of the metering device. Frost may

continue on the suction line back to the compressor.

Often a partial restriction of any type can be found by feel, as

there is a temperature difference from one side of the restriction

to the other.

With a complete restriction, there will be no sound at the

metering device entrance. An amperage check of the

compressor with a partial restriction may show normal current

when compared to the unit specification. With a complete

restriction the current drawn may be considerably less than

normal, as the compressor is running in a deep vacuum (no

load.) Much of the area of the condenser will be relatively cool

since most or all of the liquid refrigerant will be stored there.

The following conditions are based primarily on a system in

the cooling mode.

Restricted Refrigerant System

Troubleshooting a restricted refrigerant system can be

difficult. The following procedures are the more common

problems and solutions to these problems. There are two

types of refrigerant restrictions: Partial restrictions and

complete restrictions.

A partial restriction allows some of the refrigerant to circulate

through the system.

With a complete restriction there is no circulation of refrigerant

in the system.

Restricted refrigerant systems display the same symptoms

as a "low-charge condition."

When the unit is shut off, the gauges may equalize very slowly.

Gauges connected to a completely restricted system will run

in a deep vacuum. When the unit is shut off, the gauges will

not equalize at all.

Routine Maintenance

1. Clean the unit air intake filter at least every 250 to 300 fan hours of operation or when the unit's indicator light is on if so

equipped. Clean the filters with a mild detergent in warm water and allow to dry thoroughly before reinstalling.

2. The indoor coil (evaporator coil), the outdoor coil (condenser coil) and base pan should be inspected periodically (yearly

or bi-yearly) and cleaned of all debris (lint, dirt, leaves, paper, etc.). Clean the coils and base pan with a soft brush and

compressed air or vacuum. If using a pressure washer, be careful not to bend the aluminium fin pack. Use a sweeping

up and down motion in the direction of the vertical aluminum fin pack when pressure cleaning coils. Cover all electrical

components to protect them from water or spray. Allow the unit to dry thoroughly before reinstalling it in the sleeve.

NOTE: Units are to be inspected and serviced by qualified service personnel only.

Inspect the indoor blower housing, evaporator blade, condenser fan blade, and condenser shroud periodically (yearly or

bi-yearly) and clean of all debris (lint, dirt, mold, fungus, etc.) Clean the blower housing area and blower wheel with an

antibacterial / antifungal cleaner. Use a biodegradable cleaning agent and degreaser on condenser fan and condenser

shroud. Use warm or cold water when rinsing these items. Allow all items to dry thoroughly before reinstalling them.

3. Periodically (at least yearly or bi-yearly): inspect all control components, both electrical and mechanical, as well as the

power supply. Use proper testing instruments (voltmeter, ohmmeter, ammeter, wattmeter, etc.) to perform electrical

tests. Use an air conditioning or refrigeration thermometer to check room, outdoor and coil operating temperatures. Use

a sling psychrometer to measure wet bulb temperatures indoors and outdoors.

4. Inspect the surrounding area (inside and outside) to ensure that the units' clearances have not been compromised or

altered.

5. Inspect the sleeve and drain system periodically (at least yearly or bi-yearly) and clean of all obstructions and debris.

Clean both areas with an antibacterial and antifungal cleaner. Rinse both items thoroughly with water and ensure that

the drain outlets are operating correctly. Check the sealant around the sleeve and reseal areas as needed.

6. Clean the front cover when needed. Use a mild detergent. Wash and rinse with warm water. Allow it to dry thoroughly

before reinstalling it in the chassis.

NOTE: Do not use a caustic coil cleaning agent on coils or base pan. Use a biodegradable cleaning agent and

degreaser.

Troubleshooting Touch Test Chart: To Service Reversing Valves

MALFUNCTION OF VALVE

No voltage to coil.

Defective coil.

Low charge.

Pressure differential too high.

Pilot valve okay. Dirt in one

bleeder hole.

Piston cup leak

Hot

Warm

Hot

Warm

Cool

Warm

Hot

Cool

Raise head pressure, operate solenoid to free.

If still no shift, replace valve.

Raise head pressure, operate solenoid to free

partially clogged port. If still no shift, replace

valve.

Replace compressor

Check unit for correct operating pressures and

charge. Raise head pressure. If no shift, use

valve with smaller port.

Replace valve

Raise head pressure, operate solenoid. If no

shift, replace valve.

Replace valve

Raise head pressure, operate solenoid. If no

shift, use valve with smaller ports.

Raise head pressure, operate solenoid. If no

shift, replace valve.

Operate valve several times, then recheck. If

excessive leak, replace valve.

Operate valve several times, then recheck. If

excessive leak, replace valve.

Stop unit. Will reverse during equalization

period. Recheck system

Raise head pressure, operate solenoid to free

dirt. If still no shift, replace valve.

Raise head pressure, operate solenoid.

Remove valve and wash out. Check on air

before reinstalling, if no movement, replace

valve. Add strainer to discharge tube. Mount

valve horizontally.

Stop unit. After pressures equalize, restart with

solenoid deenergized. If valve shifts, reattempt

with compressor running. If it still will not reverse

while running, replace the valve.

Replace valve.

Replace compressor

Repair electrical circuit.

Replace coil.

Repair leak, recharge system.

Recheck system.

Deenergize solenoid, raise head pressure,

reenergize solenoid to break dirt loose. If

unsuccessful, remove valve, wash out. Check

on air before installing. If no movement, replace

valve, add strainer to discharge tube, mount

valve horizontally.

Stop unit. After pressures equalize, restart with

solenoid energized. If valve shifts, reattempt

with compressor running. If still no shift, replace

valve.

Check Electrical circuit and coil

Check refrigeration charge

Hot

Cool Cool,

as (2)

*TVB

Hot Hot,

as (1)

SUCTION TUBE

to Compressor

Valve will

not shift

from cool to

heat.

Valve will

not shift

from cool to

heat.

Starts to

shift but

does not

complete

reversal.

Will not shift

from heat to

cool.

Apparent

leap in

heating.

Clogged pilot tubes.

Both ports of pilot open. (Back seat

port did not close).

Defective Compressor.

Not enough pressure differential at

start of stroke or not enough flow to

maintain pressure differential.

Body damage.

Both ports of pilot open.

Body damage.

Valve hung up at mid-stroke. Pumping

volume of compressor not sufficient to

maintain reversal.

Both ports of pilot open.

Piston needle on end of slide leaking.

Pilot needle and piston needle leaking.

Pressure differential too high.

Clogged pilot tube.

Dirt in bleeder hole.

Piston cup leak.

Defective pilot.

Defective compressor.

*TVB

Hot

Warm

Hot

*TVB

WVB

*TVB

Hot

*TVB

NORMAL FUNCTION OF VALVE

DISCHARGE TUBE

from Compressor

Tube to INSIDE

COIL

Tube to OUTSIDE

COIL

LEFT Pilot

Capillary Tube

RIGHT Pilot

Capillary Tube

VALVE

OPERATING

CONDITION

*TVB

Hot

*TVB

Hot

*TVB

Hot

*TVB

WVB

*TVB

Hot

Warm

Hot,

as (1)

Hot,

as (1)

Warm,

as (1)

Hot

Cool,

as (2)

Cool,

as (2)

Cool,

as (2)

Cool,

as (2)

Cool,

as (2)

Cool,

as (2)

Cool,

as (2)

Cool,

as (2)

Cool,

as (2)

Cool,

as (2)

Warm

Hot

Hot,

as (1)

Hot,

as (1)

Hot,

as (1)

Hot,

as (1)

Hot,

as (1)

Hot,

as (1)

Warm,

as (1)

NOTES:

* TEMPERATURE OF VALVE BODY

** WARMER THAN VALVE BODY

1 2 3 4 5 6 POSSIBLE CAUSES CORRECTIONS

Normal Hot Cool Cool Hot *TVB TVB

Cooling as (2) as (1)

Normal Heating Hot Cool Hot Cool *TVB TVB

as (1) as (2)

Troubleshooting: Cooling

Refer to Sizing Charts.

Set to coldest position. Test thermostat and

replace if necessary.

Clean as recommended in Owner’s Manual.

Use steam or detergents to clean.

Adjust discharge air louvers. Use high fan

speed.

Close doors. Instruct customer on use of this

feature.

Check for leak and make repair.

Check amperage draw against nameplate. If

not conclusive, make pressure test.

Undersized unit.

Thermostat open or inoperative.

Dirty filter.

Dirty or plugged condenser or

evaporator coil.

Poor air circulation in area being

cooled.

Fresh air or exhaust air door open

on applicable models.

Low capacity – undercharge.

Compressor not pumping properly.

Does not cool, or cools

only slightly.

POSSIBLE CAUSE

PROBLEM TO CORRECT

Test switch and replace in inoperative.

Refer to applicable wiring diagram.

Test capacitor and replace if inoperative.

Test switch and replace if inoperative.

Test fan motor and replace if inoperative. (Be

sure internal overload has had time to reset.)

Inoperative system switch.

Broken, loose or incorrect wiring.

Open Capacitor.

Fan speed switch open.

Inoperative fan motor.

Fan motor

does not run.

TO CORRECT

POSSIBLE CAUSE

PROBLEM

Low voltage.

Thermostat not set cold enough or

inoperative.

Compressor hums but cuts off on

overload.

Open or shorted compressor

windings.

Open overload.

Open capacitor.

Inoperative system switch.

Broken, loose or incorrect wiring.

Check for voltage at compressor. 115 volt and 230

volt units will operate at 10% voltage variance

Set thermostat to coldest position. Test thermostat

and replace if inoperative.

Hard start compressor. Direct test compressor. If

compressor starts, add starting components.

Check for continuity and resistance.

Test overload protector and replace if inoperative.

Test capacitor and replace if inoperative.

Test for continuity in all positions. Replace if

inoperative.

Refer to appropriate wiring diagram to check wiring.

Compressor does not

run.

TO CORRECT

POSSIBLE CAUSE

PROBLEM

Unit does not run.

Fuse blown or circuit tripped.

TO CORRECT

Replace fuse, reset breaker. If repeats, check fuse

or breaker size. Check for shorts in unit wiring and

components.

Plug in power cord

Set switch correctly.

Test for continuity in each switch position.

Check wiring and connections. Reconnect per wiring

diagram.

Power cord not plugged in.

System switch in "Off" position.

Inoperative system switch.

Loose or disconnected wiring at switch or

other components.

PROBLEM

Compressor runs

continually.

Does not cycle off.

TO CORRECT:

Unit undersized. Test cooling performance of unit.

Replace with larger unit.

Check for partially iced coil. Check temperature split

across coil.

Check for oil at silver soldered connections. Check

for partially iced coil. Check split across coil. Check

for low running amperage.

Check operation of thermostat. Replace if contacts

remain closed.

Refer to appropriate wiring diagram.

PROBLEM POSSIBLE CAUSE

Excessive heat load.

Restriction in line.

Refrigerant leak.

Thermostat contacts stuck

Thermostat incorrectly wired.

Replace thermostat.

Turn to higher temperature setting to see if the unit

cycles off.

Refer to appropriate wiring diagram.

Refer to Sizing Chart.

TO CORRECT:PROBLEM

Thermostat contacts stuck.

Thermostat set at coldest point.

Incorrect wiring.

Unit undersized for area to be cooled.

POSSIBLE CAUSE

Thermostat does not

turn unit off.

PROBLEM TO CORRECT

Clean as recommended in Owner’s Manual.

Check for dirty or obstructed coil - clean as re-

quired.

Test for shorted thermostat or stuck contacts.

De-ice coil and check for leak.

Test fan motor and replace if inoperative.

De-ice coil. Check temperature differential across

coil. Touch test coil return bends for same tempera-

ture. Test for low running current.

POSSIBLE CAUSE

Evaporator coil

freezes up.

Dirty filter.

Restricted air flow.

Inoperative thermostat.

Short of refrigerant.

Inoperative fan motor.

Partially restricted capillary.

POSSIBLE CAUSE TO CORRECT

Check operation of unit. Replace overload if

system operation is satisfactory.

Allow a minimum of two (2) minutes for pressures

to equalize before attempting to restart. Instruct

customer of waiting period.

Check voltage with unit operating. Check for other

appliances on circuit. Air conditioner should be on

separate circuit for proper voltage, and be fused

separately.

Refer to appropriate wiring diagram.

Check by substituting a known good capacitor of

correct rating.

Check for proper fan speed or blocked condenser.

Check for kinked discharge line or restricted condenser.

Check amperage.

Overload inoperative. Opens too soon.

PROBLEM

Compressor attempts

to start, or runs for

short periods only.

Cycles on overload.

Compressor attempts to start before

system pressures are equalized.

Low or fluctuating voltage.

Incorrect wiring.

Shorted or incorrect capacitor.

Restricted or low air flow through

condenser coil.

Compressor running abnormally hot.

Place jumper across thermostat terminals to check

if unit operates. If unit operates, replace thermostat.

Check as above.

Refer to appropriate wiring diagram.

POSSIBLE CAUSE

Loss of charge in thermostat bulb.

Loose or broken parts in thermostat.

Incorrect wiring.

TO CORRECTPROBLEM

Thermostat does not

turn unit on.

Refer to Installation Instructions for proper

installation.

Reposition - adjust motor mount.

Check that compressor grommets have not

deteriorated. Check that compressor mounting

parts are not missing, and that shipping blocks

have been removed.

Check assembly and parts for looseness,

rubbing and rattling.

TO CORRECT

POSSIBLE CAUSE

PROBLEM

Noisy operation.

Poorly installed unit.

Fan blade striking chassis.

Compressor vibrating.

Improperly mounted or loose cabinet

parts.

Clean obstructed drain trough.

Evaporator drain pan broken or cracked. Reseal or

replace.

Check Installation Instructions. Reseal as required.

Dirty evaporator coil - clean.

Very high humidity level.

TO CORRECTPOSSIBLE CAUSE

PROBLEM

Water leaks into room.

Evaporator drain pan overflowing.

Condensation forming on base pan.

Poor installation resulting in rain

entering room.

Condensation on discharge grilles.

PROBLEM POSSIBLE CAUSE TO CORRECT

Replace thermostat.

Check gasket. Reposition or replace.

Clean and advise customer of periodic cleaning of

filter.

Replace tubular insulation on bulb.

(Applicable models.)

Adjust bulb bracket.

(Applicable models.)

Thermostat differential too narrow.

Plenum gasket not sealing, allowing

discharge air to short cycle thermostat.

Restricted coil or dirty filter.

Tubular insulation missing from top of

thermostat bulb.

Thermostat bulb touching thermostat

bulb support bracket.

Thermostat short

cycles.

TO CORRECT

Refer to appropriate wiring diagram.

PROBLEM Anticipator (resistor) wire disconnected

at thermostat or system switch.

Anticipator (resister shorted or open).

(Applicable models.)

Partial loss of charge in thermostat

bulb causing a wide differential.

POSSIBLE CAUSE

Disconnect plug from outlet. Remove resistor from

bracket. Insert plug and depress "Cool" and "Fan -

Auto (MoneySaver)” buttons. Place thermostat to

warmest setting. Feel resistor for temperature.

If no heat, replace resistor.

Replace thermostat.

Prolonged off-cycles.

(automatic operation)

PROBLEM POSSIBLE CAUSE TO CORRECT

Switches from

cooling to heating. Change room thermostat.

Refer to appropriate wiring diagram.

Thermostat sticking.

Incorrect wiring.

TO CORRECTPOSSIBLE CAUSE

PROBLEM

Repair, clean or replace as required.

Evaporator drain pan cracked or

obstructed.

Water in compressor area.

Obstructed condenser coil.

Fan blade and slinger ring improperly

positioned.

Detach shroud from pan and coil. Clean and

remove old sealer. Reseal, reinstall and check.

Steam clean.

Adjust fan blade to 1/2" clearance from condenser

coil.

Outside water leaks.

High indoor

humidity.

TO CORRECT

POSSIBLE CAUSE

PROBLEM

Adjust louvers for best possible air circulation

Operate in "Fan-Auto (MoneySaver)" position.

Advise customer.

Insufficient air circulation in air condi-

tioned area.

Oversized unit.

Inadequate vapor barrier in building

structure, particularly floors.

Troubleshooting: Heating (Heat pumps)

PROBLEM TO CORRECTPOSSIBLE CAUSE

Set thermostat to a warmer position.

Replace — do not attempt to adjust.

Check compressor wiring. Check for open internal

or external overload. Check wiring.

Test system switch

Thermostat setting.

Defective thermostat.

Compressor not operating.

Defective system switch.

No heating — fan

operates.

Clean as recommended in Owner’s Manual.

Check if outdoor thermostat is energizing the heating

element at its predetermined temperature setting

Check control setting.

TO CORRECT

POSSIBLE CAUSE

PROBLEM

Restricted filter.

Outdoor thermostat.

(Applicable models.)

Fresh air or exhaust door open.

Insufficient heating.

TO CORRECT

POSSIBLE CAUSE

PROBLEM

Check continuity of switch.

Check applicable wiring diagram.

Inoperative system switch.

Incorrect wiring.

Fan operates in

"constant" position, but

not in "automatic"

(MoneySaver).

TO CORRECT

PROBLEM POSSIBLE CAUSE

Incorrect differential setting. Replace thermostat.

Check voltage to resistor. If voltage okay, remove

resistor from thermostat bulb block. With current on,

feel resistor for warmth. If no heat can be felt,

replace anticipator.

Defective thermostat.

Heat anticipator (resistor) shorted.

(Applicable models)

Temperature varies from

comfortable to overly

warm.

TO CORRECT

PROBLEM POSSIBLE CAUSE

Room temperature

uneven.

(Heating cycle)

Disconnect power to unit. Remove resistor from

thermostat bulb block. Plug in unit and allow to

operate. Feel resistor for heat. If no heat is felt,

replace resistor.

Replace thermostat and check.

Refer to appropriate wiring diagram. Resistor is

energized during the "on" cycle of compressor or

fan.

Heat anticipator (resistor) shorted.

(Applicable models.)

Wide differential — partial loss of ther-

mostat bulb charge.

Incorrect wiring.

TO CORRECT

POSSIBLE CAUSE

PROBLEM Refer to appropriate wiring diagram.

Check for voltage at "TM" and "TM1" on timer. If

voltage, replace control.

If outside coil temperature is 25° F or below, and

preselected time limit has elapsed, replace the

defrost control.

If the contacts remain closed between terminals "2"

and "3" of the defrost control after preselected time

interval has passed, replace control.

Reinstall and assure that good bulb to coil contact is

made.

Incorrect wiring.

Defrost control timer motor not advanc-

ing.

Defrost control out of calibration.

Defrost control contacts stuck.

Defrost control bulb removed from coil,

or not making good coil contact.

Unit will not defrost.

Unit does not heat

adequately.

Outdoor thermostat does not cut off

compressor at the preselected tem-

perature and bring on heating element.

Fresh air or exhaust door open.

Dirty filter.

Unit undersized.

Defective thermostat - replace.

Check if operating properly. Instruct customer

on proper use of control.

Clean as recommended in Owner’s Manual.

Check heat rise across coil. Refer to perfor-

mance data sheet on heat rise at various

outdoor ambients. If heat rise is satisfactory,

check if insulation can be added to attic or

walls.

PROBLEM POSSIBLE CAUSE TO CORRECT

Refer to applicable wiring diagram.

Check for continuity of coil.

Block condenser coil and switch unit to cooling.

Allow pressure to build up in system, then

switch to heating. If valve fails to shift, replace

valve.

Check for continuity of system switch.

Unit cools when

heat is called for.

Incorrect wiring.

Defective solenoid coil.

Reversing valve fails to shift.

Inoperative system switch.

PROBLEM POSSIBLE CAUSE TO CORRECT

TO CORRECT

Defective thermostat — replace.

Check if operating properly. Instruct customer on

proper use of control.

Clean as recommended in Owner’s Manual

Check heat rise across coil. Refer to performance

data sheet on heat rise at various outdoor ambients. If

heat rise is satisfactory, check if insulation can be

added to attic or walls.

POSSIBLE CAUSE

PROBLEM

Outdoor thermostat does not cut off

compressor at the preselected tempera-

ture and bring on the heating element.

Fresh air or exhaust door open.

Dirty filter.

Unit undersized.

Unit does not heat

adequately.

TO CORRECT

Refer to applicable wiring diagram.

Check for continuity of coil.

Block condenser coil and switch unit to cooling. Allow

pressure to build up in the system, then switch to

heating. If valve fails to shift, replace valve.

Check for continuity of system switch.

Incorrect wiring.

Defective solenoid coil.

Reversing valve fails to shift.

Inoperative system switch.

POSSIBLE CAUSEPROBLEM

Unit cools when

heat is called for.

TO CORRECT

Check for partially starved outer coil. Replace heating

capillary tube.

Switch unit several times from heating to cooling.

Check temperature rise across the coil. Refer to

specification sheet for correct temperature rise.

Deenergize solenoid coil, raise head pressure, ener-

gize solenoid to break loose. If valve fails to make

complete shift, replace valve.

POSSIBLE CAUSE

PROBLEM

Heating capillary tube partially

restricted.

Check valve leaking internally.

Reversing valve failing to shift

completely — bypassing hot gas.

Cooling is ad-

equate, but heating

is insufficient.

TO CORRECT

Outdoor thermostat.

(Applicable models.)

Compressor will not turn

off and operate on heating

element only during low

outside ambients.

Refer to the heating data on applicable models for

the preselected temperature the compressor shuts

off and the electric element is energized.

POSSIBLE CAUSEPROBLEM

Compressor shuts off on

outdoor thermostat but

element does not heat.

TO CORRECT

Check fuse link for continuity. If defective, replace.

Check amperage draw of element. If no amperage,

replace.

Check voltage to element. If voltage is okay, check

wiring.

Fuse link.

Heating element shorted.

Incorrect wiring.

POSSIBLE CAUSEPROBLEM

Troubleshooting: Heating (Cooling/Electric Models)

Check and replace.

Replace capacitor and check.

Check if drain pan valve is open. If not, replace.

Check all connections. Check voltage to fan motor.

POSSIBLE CAUSE

PROBLEM TO CORRECT

Fan motor does not

operate in "Constant"

or "MoneySaver"

position.

Defective motor.

Open or shorted capacitor.

Condenser fan frozen to base pan.

Loose connections.

Cooling adequate,

heating insufficient.

TO CORRECT

Check for partially starved outer coil. Replace

heating capillary tube.

Switch unit several times from heating to cooling.

Check temperature rise across coil. Refer to specifi-

cation sheet for correct temperature rise.

Deenergize solenoid coil, raise head pressure,

energize solenoid to break loose. If valve fails to

make complete shift, replace valve.

Heating capillary tube partially restricted.

Check valve leaking internally.

Reversing valve failing to shift

completely – bypassing hot gas.

POSSIBLE CAUSEPROBLEM

Fan Operates –

heating element does

not come on.

TO CORRECTPOSSIBLE CAUSEPROBLEM

Heater relay or contactor coil open.

Heater relay or contactor stuck open,

pitted or burned.

High limit control open.

Open thermal fuse.

Open or shorted element.

Loose connections.

Check continuity of coil.

Inspect, test continuity with ohmmeter.

Check continuity – if open, replace.

Check continuity. Check reason for failure.

Check voltage across heater terminals. Check

amperage draw of heater.

Tighten all terminals.

PROBLEM POSSIBLE CAUSE TO CORRECT

Heating inadequate.

Restricted filter.

Cycling high limit control.

Exhaust or fresh air door open.

Clean as recommended in Owner’s Manual.

Control is set to open at 155°F ± 5°F and close at

130°F ± 8°F. If cycling prematurely, replace control.

Check position of fresh air door control slide. Adjust

cable if door does not close properly.

Fan operates in "Con-

stant" position, but not in

"Automatic" (Money-

Saver).

PROBLEM POSSIBLE CAUSE TO CORRECT

Fan relay contacts open.

Inoperative system switch.

Loose connection.

Check continuity of fan relay. NOTE: Some models

have the fan relay energized during the heating

cycle while others do not.

Check continuity between terminals "L2" and "3" of

the system switch.

Check connections on system switch and fan relay.

Disconnect power to unit. Remove resistor from

thermostat bulb block. Plug in unit and allow to

operate. Feel resistor for heat. If no heat is felt,

replace resistor.

Replace thermostat and check operation.

Long "off" and "on"

cycles.

POSSIBLE CAUSE

PROBLEM

Heat anticipator (resistor) shorted.

Defective thermostat.

TO CORRECT

PROBLEM TO CORRECT

Refer to the heating data on applicable models for

the preselected temperature the compressor shuts

off and the electric element is energized.

POSSIBLE CAUSE

Outdoor thermostat.

(Applicable models.)

Compressor will not

turn off and operate on

heating element only

during low outside

ambients.

Troubleshooting Chart — Cooling

Low Suction Pressure High Suction Pressure Low Head Pressure High Head Pressure

Low Load Conditions High Load Conditions Low Load Conditions High Load Conditions

Low Air Flow Across High Air Flow Across Refrigerant System Low Air Flow Across

Indoor Coil Indoor Coil Restriction Outdoor Coil

Refrigerant System Reversing Valve not Reversing Valve not Overcharged

Restriction Fully Seated Fully Seated

Undercharged Overcharged Undercharged Noncondensables (air)

in System

Moisture in System Defective Compressor Defective Compressor

REFRIGERANT SYSTEM

DIAGNOSIS COOLING

Electrical Troubleshooting Chart

(Heat Pump)

Reversing Valve Stuck

Replace the Reversing Valve

Replace the Solenoid Coil

Is the Solenoid Coil Good?

Is Line Voltage

Present at the Solenoid

Is the Selector Switch

Set for Heat?

SYSTEM COOLS WHEN

HEATING IS DESIRED.

YES

HEAT PUMP

YES

Troubleshooting Chart — Heating

Noncondensables (air) in

System

Overcharged

Low Airflow Across

Indoor Coil

Outdoor Ambient Too High

For Operation In Heating

High Head Pressure

REFRIGERANT SYSTEM

DIAGNOSIS – HEATING

Moisture in System Defective Compressor Defective Compressor

Undercharged Overcharged Undercharged

Refrigerant System

Restriction Reversing Valve not

Fully Seated

Low Airflow

Across Outdoor Coil

Outdoor Ambient Too High

for Operation in Heating Refrigerant System

Restriction

Low Suction Pressure High Suction Pressure Low Head Pressure

Reversing Valve not

Fully Seated

MODELS

RS10J10C, RS12J10A-B, RS15J10A, RS16J30A-A, RS18J30A, RM24J30-A

MOTOR MOUNT

TO INNERWALL/

WHITE

BROWN

OR GREEN/YELLOW

TERMINAL

COMPRESSOR

BLACK

BLUE

RED

BLACK

ORIENTATION

MAY VARY.

REFER TO

MARKINGS ON

COMPRESSOR

OVERLOAD

PROTECTOR

BLUE

RED

COMPRESSOR

ALTERNATE

BLACK

COMPRESSOR

WIRE HARNESS

BLACK

OR WHITE BLUE

ANTICIPATOR

RESISTOR

TO CAPACITOR

GREEN

BRACKET

RED

BLUE

TO CHASSIS

CAPACITOR

FAN

HERM

GREEN

WIRING DIAGRAM

SUPPLY CORD

TO CAPACITOR

MEDIUM

LOW LOW

SMOOTH CONDUCTOR

OR BROWN

THERMOSTAT

BLUE

RED

BLUE

BROWN

PURPLE

GREY

RED

BLACK

ROCKER (GE)

SWITCH,

SWITCH

SYSTEM

ORANGE

BLACK

BLUE

RED

BLACK

ORANGE

BLUE

FAN

MOTOR

OR GREEN/YELLOW

HIGH

LOW

RIBBED CONDUCTOR

OR BLUE

GREEN

BRACKET

MS M

SCHEMATIC

YES

L1 1

SWITCH POSITION

SWITCH LOGIC

LOW COOL

HI COOL

MED COOL

OFF

FAN ONLY

SYS SW

6LL

X = CLOSED

0 = OPEN

CIRCUIT

1234 65

XO XO

OOOO

OX OX OO

LL COOL XOOO XO

PART NO. REV

- COMBINATION TERMINAL

MTR

COMPR

IDT

OVLD

MEDIUM

HIGH

OVLD

CAP

HERM

L E G E N D

- MONEY SAVER/ROCKER SWITCH

LOW

- COMPRESSOR

- INDOOR THERMOSTAT

- SYSTEM SWITCH

- ANTICIPATOR RESISTOR

- FAN MOTOR

- OVERLOAD PROTECTOR

- CAPACITOR

CAP

SYS SW

OVLD

COMPR

MTR

IDT

CAP

FAN C

- GROUND LEAD

- PLASTIC INSULATOR

619-405-00 00

MODELS

SQ06J10B-B, SQ06J10B-A, SQ08J10C-A, SQ08J10D-A

GREY

HARNESS, COMPR.

COMPRESSOR

WHITE BLUE

RESISTOR

ANTICIPATOR

CAPACITOR

BLUE

RED

HERM

FAN

BLACK

BROWN

WHITE

MOTOR MOUNT

TO INNERWALL/

GREEN

RED

BLUE

BLACK

BLUE

RED

PURPLE

CMS

SWITCH

BROWN

ROCKER (GE)

RED

SWITCH

BLUE

SMOOTH

CONDUCTOR

SYSTEM

SUPPLY CORD

BLACK

THERMOSTAT

BLUE

RED

FAN

MOTOR

BRACKET

TO CAPACITOR

GREEN

RIBBED CONDUCTOR

MS M

L1 1

YES

SWITCH LOGIC

SYS SW

X = CLOSED

0 = OPEN

PART NO. REV.

- COMBINATION TERMINAL

MTR

COMPR

IDT

OVLD

CAP

HERM C

L E G E N D

- MONEY SAVER/ROCKER SWITCH

- COMPRESSOR

- INDOOR THERMOSTAT

- SYSTEM SWITCH

- ANTICIPATOR RESISTOR

- FAN MOTOR

- OVERLOAD PROTECTOR

- CAPACITOR

CAP

SYS SW

OVLD

COMPR

MTR

IDT

CAP

FAN C

- GROUND LEAD

- PLASTIC INSULATOR

619-142-15 01

NOTE:

OPTIONAL

CONFIGURATION

WIRING DIAGRAM

SCHEMATIC

SWITCH POSITION

LOW COOL

HI COOL

MED COOL

OFF 13245

CIRCUIT

XOOO

OO OO

XO XO OX

FAN ONLY OX OOO

21C

MEDIUM

HIGH

LOW S

"F""F"

"F"

MODELS

KQ05J10B-B, KQ05E10-C KQ06J10B-A, KQ06J10B-B, KQ06E10-A, KQ06E10-B

PART NO. REV.

HERM

FAN

619-046-01

(OPTIONAL)

PTCR

PTCR (OPTIONAL)

CAPACITOR

COMPRESSOR

FAN MOTOR

SYSTEM SWITCH

SUPPLY CORD

THERMOSTAT

WIRE HARNESS

SEE DETAIL " A "

WIRING DIAGRAM

RIBBED (OR BLUE) CONDUCTOR

SCREW

TO GND

GREEN/YELLOW

BLACK

SMOOTH (OR BROWN) CONDUCTOR

RED

BLUE

WHITE

BROWN

RED

BLACK

RED

BLACK

SCHEMATIC

WHITE

SYSTEM SWITCH SEQUENCE

OFF

CW ROT

LO FAN

HI FAN

LO COOL

HI COOL

CONNECTION

ALL OPEN

L1-L,L1-C

L1-H

L1-L

L1-H,L1-C

BLACK

RED

BROWN

LINE

DETAIL " A " OPTIONAL WIRING

DETAIL " B " OPTIONAL SCHEMATIC

SYSTEM SWITCH

T\STAT

CONTROL

ANTI-ICE

THERMOSTAT

BLK

RED

L H

BLACK

BLK

WHITE

RED BLACK

ANTI-ICE

CONTROL

SEE DETAIL "B"

H C

CH S C

RIBBED CONDUCTOR

LEGEND: = OPTIONAL FACTORY WIRING PTCR = START ASSIST DEVICE

BLACK

LINE

BLACK

SYSTEM SWITCH

FAN MOTOR CAPACITOR

T/STAT

COMPRESSOR

OLVD

MODELS

KQ08J10B-1, KQ08J10B-A, KQ08J10C-A

PTCR

(OPTIONAL)

HERM

FAN

617-581-04

PTCR (OPTIONAL)

PART NO. REV.

CONFIGURATION

OPTIONAL

NOTE:

BROWN

SEE DETAIL " A "

WIRE HARNESS

SRC

BLUE

BLACK

THERMOSTAT

BLACK

GREEN

TO GND

SCREW

BLK

BLACK

SUPPLY CORD

BROWN

WIRING DIAGRAM

CAPACITOR

RED

BLACK

BLUE

BLUE RED

FAN MOTOR

RED

BROWN

WHITE

BLACK

DETAIL " A " OPTIONAL WIRING

SYSTEM SWITCH

RED

CAPACITOR

SCHEMATIC

L1-H,L1-C

L1-L,L1-C

ALL OPEN

CONNECTION

SYSTEM SWITCH SEQUENCE

HI FAN

LO FAN

CW ROT

OFF

HI COOL

LO COOL

LINE

L1-L

L1-H

SYSTEM SWITCH

= OPTIONAL FACTORY WIRING

FAN MOTOR

WHITE

RED

BLACK

LEGEND:

LINE

BRN

ANTI-ICE

CONTROL

DETAIL " B " OPTIONAL SCHEMATIC

THERMOSTAT

BLK

BLK OR

RED L

BLACK

H C CONTROL T/STAT

BLK OR

LHC

BROWN

ANTI-ICE

SYSTEM SWITCH

BLACK

COMPRESSOR

SEE DETAIL "B"

BLUE

PTCR = START ASSIST DEVICE

H S

T\STAT

OLVD

RED RED

MODELS

XQ05J10-B, XQ06J10-A, XQ06J10-B, XQ08J10-1, XQ08J10-A, XQ08J10A-A

ELECTRONIC CONTROL

BLACK

TO CAPACITOR

CAPACITOR

BRACKET

RED

BLUE

GREEN

TO CHASSIS

FAN

HERM

BROWN

WHITE

GREEN/YELLOW

MOTOR MOUNT

TO INNERWALL/

RIBBED CONDUCTOR

RELAY

COM NO

BLUE

BLACK

RED

RELAY

TRANSFORMER

SMOOTH CONDUCTOR

GREEN OR

SUPPLY CORD

MOTOR WIRE

HARNESS

BLACK

RED

BLUE

MOTOR

FAN

TO CAPACITOR

BRACKET

SWITCH LOGIC

ELECTRONIC CONTROL

COM

PART NO. REV.

- COMBINATION TERMINAL

(115 V)

OVLD

NEUTRAL

CAP

MTR FAN C

L E G E N D

OVLD

- CAPACITOR

- FAN MOTOR

- OVERLOAD PROTECTOR

- COMPRESSOR

CAP

COMPR

OVLD

MTR

CAP

COMPR HERM C

- GROUND LEAD

619-142-14 03

GREEN/YELLOW

OR BROWN

OR BLUE

GREEN OR

BLACK

BLUE

RED

COMPRESSOR

WIRE HARNESS

COMPRESSOR

TERMINAL

ORIENTATION

MAY VARY.

REFER TO

OVERLOAD

PROTECTOR

COMPRESSOR

MARKINGS ON

LOW

MEDIUM

HIGH

WHITE

BLACK

WIRING DIAGRAM

SCHEMATIC

X = CLOSED

O = OPEN

SWITCH POSITION

MED COOL

LOW COOL

HI COOL

OFF 32154

CIRCUIT

OO OX OO

XO OO OO

MEDIUM

HIGH

LOW

MODEL

YQ06J10B-A

PART NO. REV.

617-581-11

- COMBINATION TERMINAL

L E G E N D

- GROUND LEAD

- PLASTIC INSULATOR

- CAPACITOR

- COMPRESSOR

- INDOOR THERMOSTAT

- SYSTEM SWITCH

- FAN MOTOR

- OVERLOAD PROTECTOR

SYS SW

OVLD

IDT

COMPR

MTR

CAP

X = CLOSED

O = OPEN

SWITCH LOGIC

WHITE

TO GND

SCREW

SMOOTH (OR BROWN) CONDUCTOR

GREEN

BLACK

BLUE

BLACK

BLUE

BLACK

BLUE

RED

BLACK

RED

WHITE

BLUE

RED

BLUE

HERM

FAN

RED

BLACK

RED

BROWN

WHITE

SOLENOID

SYSTEM SWITCH

LINE

COMPRESSOR

RUN CAPACITOR

C' OVLD.

THERMOSTAT

DEFROST CONTROL T/STAT.

FAN MOTOR

FAN OVERLOAD

HIGH

LOW

PTCR (OPTIONAL)

- OPTIONAL FACTORY WIRING

PTCR - START ASSIST DEVICE

PTCR

(OPTIONAL)

BLACK

(HARNESS, COMPR. MOLDED)

COMPRESSOR

BLUE

RED

BLACK

SOLENOID

CAPACITOR

FAN MOTOR

SYSTEM SWITCH

THERMOSTAT

DEFROST CONTROL

SUPPLY CORD

RIBBED (OR BLUE) CONDUCTOR

LO-HEAT

13245

OOOOO

CIRCUIT

OFF

LO-COOL

HI-COOL

HI-FAN

SWITCH POSITION

SCHEMATIC

WIRING DIAGRAM

1 2 3

3142

HI-HEAT XX

OOO

OOOO

MODEL: SC06H10D

MODELS

SS08J10R-B, SS08J10R-A, SS09J10C-A, SS10J10AR-A,

SS12J10AR-B, SS14J10R-A, SS12J30D-A, SS16J30A-A,

SS18J30R-A, SM20J30-A, SM24J30-A

DEFROST

SENSOR

ROOM

TO CHASSIS

BLUE

RED

BRACKET

TO CAPACITOR

GREEN

CAPACITOR

FAN

HERM

BRACKET

TO CAPACITOR

GREEN/YELLOW

GREEN OR

RIBBED CONDUCTOR

ELECTRONIC CONTROL

BLACK

OR BROWN

SMOOTH CONDUCTOR

RED

ORANGE

BLACK

WHITE

BLUE

BLACK

ORANGE

WHITE

BROWN RED

TO INNERWALL/

GREEN/YELLOW

GREEN OR

MOTOR MOUNT

MOTOR

FAN

OR BLUE

SUPPLY CORD

ELECTRONIC CONTROL

SWITCH LOGIC

REV.PART NO.

- GROUND LEAD

NEUTRAL

- COMBINATION TERMINAL

OVLD MTR

CAP

FAN C

- COMPRESSOR

- OVERLOAD PROTECTOR

L E G E N D

COM

OVLD

MTR

OVLD

COMPR

CAP - CAPACITOR

- FAN MOTOR

COMPR

HERM

CAP

(230/208)

(115 V)

619-405-06 01

RELAY

COM

TRANSFORMER

BLUE

BLACK

BLUE

RED

COMPRESSOR

WIRE HARNESS

COMPRESSOR

TERMINAL

ORIENTATION

MAY VARY.

REFER TO

OVERLOAD

PROTECTOR

COMPRESSOR

MARKINGS ON

COMPRESSOR

ALTERNATE

RED

BLACK

BLUE

WIRING DIAGRAM

SLEEP OO XOX

SCHEMATIC

LOW COOL

MED COOL

SWITCH POSITION

HI COOL

OFF

CIRCUIT

O = OPEN

X = CLOSED

MEDIUM

HIGH

SLEEP

LOW

MODELS

SL28J30B-A, SL35J30-A, SL35J30-B

BROWN

WHITE

TO INNERWALL/

MOTOR MOUNT

MOLDED

COMPRESSOR

HARNESS,

COMPRESSOR

OVERLOAD

COMPRESSOR

ALTERNATE

BLUE

RED

BLACK

PROTECTOR

BLUE

ANTICIPATOR

RESISTOR

TO CHASSIS

RED

TO CAPACITOR

BLUE

BRACKET

GREEN

CAPACITOR

FAN

HERM

BLACK

GREEN/YELLOW

WIRING DIAGRAM

TO CAPACITOR

SUPPLY CORD

SMOOTH CONDUCTOR

BLUE

SYSTEM SWITCH

PURPLE

RED

ROCKER SWITCH (GE)

RED

GREY

BROWN

BLUE

ORANGE

BLACK

HL1

THERMOSTAT

BLACK

ORANGE

BLUE

MOTOR

FAN

GREEN/YELLOW

OR BROWN

RIBBED CONDUCTOR

OR BLUE

BRACKET

MS M

SCHEMATIC

L1 1

YES

SWITCH POSITION

SWITCH LOGIC

LOW COOL

HI COOL

MED COOL

OFF

SYS SW

13245

X = CLOSED

0 = OPEN

CIRCUIT

XOOO

OO OO

XO XO OX

FAN ONLY OX OOO

PART NO. REV.

- COMBINATION TERMINAL

MTR

COMPR

IDT

OVLD

MEDIUM

HIGH

OVLD

CAP

SHERM

L E G E N D

- MONEY SAVER/ROCKER SWITCH

LOW

- COMPRESSOR

- INDOOR THERMOSTAT

- SYSTEM SWITCH

- ANTICIPATOR RESISTOR

- FAN MOTOR

- OVERLOAD PROTECTOR

- CAPACITOR

CAP

SYS SW

OVLD

COMPR

MTR

IDT

CAP

SFAN C

- GROUND LEAD

- PLASTIC INSULATOR

619-405-01 00

"F"

"F" "F"

ORIENTATION MAY VARY. REFER

COMPRESSOR TERMINAL

TO MARKING ON COMPRESSOR.

BLACK OR WHITE

GREEN OR

MODELS

KS10E10-A, KS10J10-B, KS12E10-A, KS12J10B-A, KS15J10-A,

KS12J30B-A, KS18J30-A, KM20J30-A, KM24J30-A

BROWN

WHITE

TO INNERWALL/

MOTOR MOUNT

MOLDED

COMPRESSOR

HARNESS,

COMPRESSOR

OVERLOAD

COMPRESSOR

ALTERNATE

BLUE

RED

BLACK

PROTECTOR

BLUE

ANTICIPATOR

RESISTOR

TO CHASSIS

RED

TO CAPACITOR

BLUE

BRACKET

GREEN

CAPACITOR

FAN

HERM

BLACK

GREEN/YELLOW

WIRING DIAGRAM

TO CAPACITOR

SUPPLY CORD

SMOOTH CONDUCTOR

BLUE

SYSTEM SWITCH

PURPLE

RED

ROCKER SWITCH (GE)

RED

GREY

BROWN

BLUE

ORANGE

BLACK

HL1

THERMOSTAT

BLACK

ORANGE

BLUE

MOTOR

FAN

GREEN/YELLOW

OR BROWN

RIBBED CONDUCTOR

OR BLUE

BRACKET

MS M

SCHEMATIC

L1 1

YES

SWITCH POSITION

SWITCH LOGIC

LOW COOL

HI COOL

MED COOL

OFF

SYS SW

13245

X = CLOSED

0 = OPEN

CIRCUIT

XOOO

OO OO

XO XO OX

FAN ONLY OX OOO PART NO. REV.

- COMBINATION TERMINAL

MTR

COMPR

IDT

OVLD

MEDIUM

HIGH

OVLD

CAP

HERM

L E G E N D

- MONEY SAVER/ROCKER SWITCH

LOW

- COMPRESSOR

- INDOOR THERMOSTAT

- SYSTEM SWITCH

- ANTICIPATOR RESISTOR

- FAN MOTOR

- OVERLOAD PROTECTOR

- CAPACITOR

CAP

SYS SW

OVLD

COMPR

MTR

IDT

CAP

FAN C

- GROUND LEAD

- PLASTIC INSULATOR

619-405-01 00

"F"

"F" "F"

ORIENTATION MAY VARY. REFER

COMPRESSOR TERMINAL

TO MARKING ON COMPRESSOR.

BLACK OR WHITE

GREEN OR

MODELS

ES12J33B-A, ES16J33A-A, EM18J34B-A, EL25J35-A, EL35J35-B, EK18J34A

HEATER

BRACKET

TO CAPACITOR

BLACK OR WHITE

ORANGE

BLACK

YELLOW

BLUE

RED

THERMOSTAT

YELLOW

RED

BLUE

TO CAPACITOR

CORD

SUPPLY

SMOOTH CONDUCTOR

OR BROWN

WHITE

PURPLE

BLUE

ORANGE

BLUE

OR BLUE

ANTICIPATOR

RESISTOR

RIBBED CONDUCTOR

GREEN OR

YELLOW

GREEN/

GREEN

WIRING DIAGRAM

PROTECTOR

BLACK

RED

BLUE

GRAY

WHITE

BLUE

RED

BROWN

SYSTEM SWITCH

BLUE

HAR

BROWN

ORANGE

BLACK

RED

BLUE

ALTERNATE

BLACK

COMPRESSOR

WIRE HARNESS

BLACK

PINK

BLACK

WHITE

PURPLE

GRAY

CAPACITOR

ROCKER SWITCH

PINK

FAN

RED

BROWN

BLUE

HERM

BLUE

OVERLOAD

BLACK

WHITE

ORANGE

BROWN

RED

ORANGE

MAY VARY.

COMPRESSOR

TERMINAL

ORIENTATION

REFER TO

COMPRESSOR

MARKINGS ON

COMPRESSOR

TO INNERWALL/

FAN

MOTOR

MOTOR MOUNT

GREEN OR

TO CHASSIS

O O O X O X O X O X

LOW HEAT

BRACKET

SCHEMATIC

1NO

3YES

IDT 3

MEDIUM HEAT

HIGH COOL

MEDIUM COOL

SWITCH POSITION

SWITCH LOGIC

OFF

HIGH HEAT

LOW COOL

SYS SW

CIRCUIT

X = CLOSED

0 = OPEN

1 2 3 4 5 6 7 8 9 10

O O O O O O O O O O

O X O O O X O X O X

O O X O O X O X O X

O O X O X O X O X O

O X O O X O X O X O

O O O X X O X O X O

FAN ONLY X O O O O O O O O O

PART NO. REV.

- GROUND LEAD

- COMBINATION TERMINAL

- PLASTIC INSULATOR

- HEATER LIMIT

- THERMAL FUSE

HERM

HIGH

LOW

MEDIUM

OVLD R

MTR

COMPR

- OVERLOAD PROTECTOR

- INDOOR THERMOSTAT

L E G E N D

- MONEY SAVER/ROCKER SWITCH

- ANTICIPATOR RESISTOR

10 5

- SYSTEM SWITCH

- COMPRESSOR

- FAN MOTOR

- CAPACITOR

CAP

OVLD

COMPR

MTR

SYS SW

IDT

HTR

OVLD

HTR

HL - HEATER

FAN

CAP

619-405-02 00

GREEN/YELLOW

(GE)

MODELS

YS12J33-A, YM18J34B-A, YL24J35C-A

HEATER

PURPLE

CAPACITOR

ROCKER SWITCH

YELLOW

BLUE

RED

PINK

BLACK

PURPLE

BLUE

BLACK

WHITE

ORANGE

BLACK

YELLOW

BLUE

RED

THERMOSTAT

BLACK

BROWN

WHITE

BLUE

RED

WHITE

THERMOSTAT

ORANGE

DEFROST

CORD

SUPPLY

BLACK

BLUE

ANTICIPATOR

RESISTOR

PINK

FAN

MOTOR

SYSTEM SWITCH

BLUE

GRAY

VALVE ASY

REVERSING

RED

BROWN

HERM

BLUE

RED

BLUE

BLACK

WHITE

ORANGE

BROWN

FAN

ORANGE

RED

YES2

1NO

IDT

1 2 3 4 5 6 7 8 9 10

O O O O O O O O O O

CIRCUIT

O O O X O X O X O X

O X O O O X O X O X

O O X O O X O X O X

O O X O X O X O X O

O X O O X O X O X O

O O O X X O X O X O

SWITCH LOGIC

SWITCH POSITION

MEDIUM COOL

LOW COOL

HIGH COOL

HIGH HEAT

LOW HEAT

MEDIUM HEAT

OFF

SYSTEM SWITCH

X = CLOSED

0 = OPEN

X O O O O O O O O O

FAN ONLY PART NO. REV.

- COMBINATION TERMINAL

MEDIUM

HIGH

OVLD

ODT

LOW

OVLD

MTR

COMPR

FAN C

CAP

HERM C

L E G E N D

RV HL

- CAPACITOR

- FAN MOTOR

- OVERLOAD

- INDOOR THERMOSTAT

- MONEY SAVER

- ANTICIPATOR RESISTOR

- REVERSING VALVE

- COMPRESSOR

CAP

COMPR

OVLD

MTR

IDT

HTR TF

CAP

- HEATER LIMIT

- HEATER

- GROUND LEAD

- PLASTIC INSULATOR

- THERMAL FUSE

HTR

- OUTDOOR THERMOSTAT

ODT 619-405-04

ALTERNATE

COMPRESSOR

(GE)

TO CAPACITOR

HAR M

L1 4

RIBBED CONDUCTOR OR BLUE

SMOOTH CONDUCTOR OR BROWN

GREEN OR

GREEN

TO CAPACITOR

BRACKET

WIRING DIAGRAM

GRAY BROWN

BRACKET

SCHEMATIC

TO CHASSIS

GREEN/

YELLOW

BLACK OR WHITE

OVERLOAD

PROTECTOR

COMPRESSOR

WIRE HARNESS

BLACK

RED

BLUE

RED

BLACK

BLUE

MAY VARY.

COMPRESSOR

ORIENTATION

COMPRESSOR

MARKINGS ON

REFER TO

TERMINAL

GREEN OR

GREEN/YELLOW

TO INNERWALL/

MOTOR MOUNT

MODEL

YS09J10B-A

PART NO. REV.

619-142-17

- COMBINATION TERMINAL

L E G E N D

- GROUND LEAD

- PLASTIC INSULATOR

- CAPACITOR

- FAN MOTOR

- OVERLOAD PROTECTOR

- INDOOR THERMOSTAT

- MONEY SAVER

- ANTICIPATOR RESISTOR

- REVERSING VALVE

- COMPRESSOR

COMPR

OVLD

IDT

MTR

CAP

PURPLE

CAPACITOR

MOTOR

GRAY

FAN

ORANGE

BROWN

BLACK

BLUE

WHITE

ROCKER SWITCH

BROWN

BLUE

HERM

RED

GRAY BROWN

SWITCH

BLUE

BLACK OR WHITE

ANTICIPATOR

FAN

RED

RESISTOR

BLUE

PINK

WHITE

PURPLE

BLUE

BLACK

WHITE

ORANGE

BLUE

THERMOSTAT

BLUE

RED

BROWN

RED

YELLOW

RED

BLUE

IDT

SYSTEM SWITCH

YES

NO2

LOW

HIGH

MEDIUM

OVLD

FAN

HERM

COMPR

CAP

MTR

SWITCH LOGIC

SWITCH POSITION

FAN ONLY

MEDIUM COOL

OFF

LOW COOL

HIGH COOL

HIGH HEAT

LOW HEAT

MEDIUM HEAT

1 2 3 4 5 6 7 8 9 10

O O O O O O O O O O

X O O O O O O O O O

X = CLOSED

0 = OPEN

CIRCUIT

O O O X O X O X O X

O X O O O X O X O X

O O X O O X O X O X

O O X O X O X O X O

O X O O X O X O X O

O O O X X O X O X O

VALVE

REVERSING

WHITE

BLACK

CORD

SUPPLY

YELLOW

- OUTDOOR THERMOSTAT

ODT

RED

BLUE

ALTERNATE

COMPRESSOR

(GE)

BLUE

SYSTEM

BLACK

ODT

THERMOSTAT

2PINK

DEFROST

WHITE

TO CHASSIS

WIRING DIAGRAM

GREEN

TO CAPACITOR

BRACKET

5L1

CAR M

3MS 4

SCHEMATIC

RIBBED CONDUCTOR OR BLUE

SMOOTH CONDUCTOR OR BROWN

YELLOW

GREEN/

GREEN OR

TO CAPACITOR

BRACKET

BLUE

BLACK

RED

COMPRESSOR

WIRE HARNESS

OVERLOAD

PROTECTOR

BLACK

BLUE

RED

COMPRESSOR

TERMINAL

MAY VARY.

ORIENTATION

MARKINGS ON

REFER TO

COMPRESSOR

MOTOR MOUNT

TO INNERWALL/

GREEN/YELLOW

GREEN OR

MODELS

EQ08J11-A, EQ08J11-B

HARNESS, COMPR.

COMPRESSOR

CAPACITOR

BLUE

RED

HERM

FAN

BLACK

BROWN

WHITE

GREEN

RED

BLACK

BLUE

SMOOTH (OR BROWN)

BLUE

SWITCH

BLUE

CONDUCTOR

SYSTEM

SUPPLY CORD

BLACK

THERMOSTAT

RED

FAN

MOTOR

BRACKET

TO CAPACITOR

GREEN

L1 1C

SWITCH LOGIC

SYS SW

X = CLOSED

0 = OPEN

PART NO. REV.

- COMBINATION TERMINAL

MTR

COMPR

IDT

OVLD

CAP

HERM C

L E G E N D

- COMPRESSOR

- INDOOR THERMOSTAT

- SYSTEM SWITCH

- FAN MOTOR

- OVERLOAD PROTECTOR

- CAPACITOR

CAP

SYS SW

OVLD

COMPR

MTR

IDT

CAP

FAN C

- GROUND LEAD

- PLASTIC INSULATOR

617-581-12 01

NOTE:

OPTIONAL

CONFIGURATION

HTR

HL TF

HEATER

ORANGE

RED

RIBBED CONDUCTOR

YELLOW

RED

ORANGE

BLACK

- PRE-INSULATED CONDUCTOR

- HEATER

HTR

- HEATER LIMIT

HL - THERMAL FUSE

RED

WIRING DIAGRAM

SCHEMATIC

SWITCH POSITION

LOW COOL

HI COOL

LOW HEAT

OFF 1324

CIRCUIT

OO O

OO OO

XOXX

HI HEAT OXO

"F""F"

"F"

FAN

XXOO

MODELS

WS07A10E-B, WS07A10E-C, WS10A10-A, WS12A10E-A,

WS09A30E-B, WS12A30E-A, WS15A30-A

WHITE (OR YELL0W)

BROWN

BLACK

BLUE

RED CAPACITOR

FAN

HERM

TO GROUNDING

SUPPLY CORD

SMOOTH CONDUCTOR

BROWN

SYSTEM SWITCH

BLUE

PURPLE

BLACK

PURPLE

HL1

RED

THERMOSTAT

PURPLE

BLACK

RED

MOTOR

FAN

GREEN

RIBBED CONDUCTOR

SCREW

L1 1C

SWITCH LOGIC

SYS SW

0 = OPEN

X = CLOSED

REV.PART NO.

- COMBINATION TERMINAL

(208/230 V)

(115 V)

MTR

COMPR

IDT

OVLD

NEUTRAL

CAP

HERM C

L E G E N D

- OVERLOAD PROTECTOR

- FAN MOTOR

- SYSTEM SWITCH

- INDOOR THERMOSTAT

- COMPRESSOR

- CAPACITOR

CAP

SYS SW

OVLD

MTR

COMPR

IDT

CAP

FAN C

- PLASTIC INSULATOR

- GROUND LEAD

617-581-14 00

WIRING DIAGRAM

SCHEMATIC

SWITCH POSITION

LOW COOL

MED COOL

HI COOL

OFF 54231

CIRCUIT

XOOO

OO OO

XO XO OX

FAN ONLY OX OOO

21C

MEDIUM

HIGH

LOW S

RED

BLUE

BLACK

COMPRESSOR

OVERLOAD

PROTECTOR

COMPRESSOR

WIRE HARNESS

MODELS

WE09A33E-B, WE12A33E-A, WE15A33-A

L1 L2

BLUE

PURPLE

WHITE

PINK

RED

BROWN

SMOOTH CONDUCTOR

RIBBED CONDUCTOR

THERMOSTAT

CORD

SUPPLY YELLOW

CAPACITOR

FAN

MOTOR

BLACK

SYSTEM SWITCH

BLACK

ORANGE

YELLOW

RED

HERM

BLUE

YELLOW

PURPLE

RED

BROWN

FAN

HEATER

COMPR

SYS SW

OVLD

1 2 3 4 5 6 7 8 9 10

O O O O O O O O O O

O O O X O X O X O X

O X O O O X O X O X

O O X O O X O X O X

O O X O X O X O X O

O X O O X O X O X O

O O O X X O X O X O

CIRCUIT

SWITCH LOGIC

SWITCH POSITION

MEDIUM COOL

LOW COOL

HIGH COOL

HIGH HEAT

LOW HEAT

MEDIUM HEAT

OFF

SYS SW

X = CLOSED

0 = OPEN

CAP

MTR

IDT

X O O O O O O O O O

FAN ONLY

PART NO. REV.

- COMBINATION TERMINAL

CAP

OVLD

MEDIUM

HIGH

LOW

OVLD

MTR

SFAN

CAP

COMPR

SHERM C

L E G E N D

- OVERLOAD PROTECTOR

- INDOOR THERMOSTAT

- MONEY SAVER/ROCKER SWITCH

- ANTICIPATOR RESISTOR

- SYSTEM SWITCH

- COMPRESSOR

- CAPACITOR

- FAN MOTOR

HTR TF

- THERMAL FUSE

- HEATER LIMIT

- HEATER

- GROUND LEAD

- PLASTIC INSULATOR

HTR

617-581-15 00

SCHEMATIC

LC2

WIRING DIAGRAM

OVERLOAD

PROTECTOR

COMPRESSOR

WIRE HARNESS

BLACK

RED

BLUE

COMPRESSOR

MODELS

WY09A33F-A, WY12A33G-A

TO GROUNDING

PART NO. REV.

617-581-02

- OUTDOOR THERMOSTAT

ODT

- COMBINATION TERMINAL

L E G E N D

- HEATER LIMIT

- HEATER

- GROUND LEAD

- PLASTIC INSULATOR

- THERMAL FUSE

HTR

HTR TF

- CAPACITOR

- OVERLOAD PROTECTOR

- INDOOR THERMOSTAT

- MONEY SAVER

- COMPRESSOR

- REVERSING VALVE

- FAN MOTOR

COMPR

OVLD

IDT

MTR

CAP

ODT

OVLD

FAN C

COMPR

HERM

CAP

OVLD

MTR

LOW

IDT

MEDIUM

HIGH

X O O O O O O O O O

FAN ONLY

CIRCUIT

O X O O O X O X O X

1 2 3 4 5 6 7 8 9 10

O O O O O O O O O O

O O X O O X O X O X

O O X O X O X O X O

O X O O X O X O X O

O O O X X O X O X O

O O O X O X O X O X

0 = OPEN

X = CLOSED

MEDIUM COOL

LOW COOL

HIGH COOL

HIGH HEAT

MEDIUM HEAT

LOW HEAT

SWITCH LOGIC

SWITCH POSITION

OFF

SCREW

T/STAT

DEFROST

HERM

CAPACITOR

HEATER

RED

BLACK

BLUE

YELLOW

ORANGE

YELLOW

BLUE

RED

ORANGE

FAN MOTOR

BLACK

BLUE

COMPRESSOR

REV VALVE

BROWN

RED

YELLOW

BLACK

PURPLE

BLACK

BLUE

SYSTEM SWITCH

BLUE

BLACK

YELLOW

BROWN

RIBBED CONDUCTOR

SMOOTH CONDUCTOR

FAN

SUPPLY CORD

BROWN

BLUE

BLACK

YELLOW

WHITE

BLUE

THERMOSTAT

YELLOW

BROWN

BLUE

WHITE

HARNESS, COMPRESSOR

MOLDED

OVERLOAD,

PROTECTOR

SCHEMATIC

CAR H

WIRING DIAGRAM

13MS 4

GREEN

Testing The Electronic Control

2001 XQ Boards & QME Boards

Checking Room Temperature:

1. Check the room temperature at the electronic control pad by pressing at the same time the

"FAN SPEED" button and the temperature "UP" button on XQ models.

2. Check the room temperature at the electronic control pad by pressing at the same time the

"FAN SPEED" button and the "WARMER" button on QME models. The indoor temperature

will display for 10 seconds. Indoor temperature can be viewed in all modes, including the TEST

mode. The display can be changed back to SET temperature by pressing any key, except the

ON/OFF button, or after 10 seconds has elapsed.

Activating Test Mode: Activate test mode by pressing at the same time the "MODE" button and

the temperature "DOWN" button on XQ models. LEDs for Hour, Start, and Stop will blink 1

bps while Test Mode is active. Activate test mode by pressing at the same time the "MONEY

SAVER" button and the "FILTER ALERT" button on QME models. LED for the Filter Alert will

blink 1 bps while Test Mode is active.

Test Mode has duration of 90 minutes. Test Mode can be activated under any conditions,

including Off. Test Mode is cancelled by pressing the On/Off button, unplugging the unit, or

when the 90 minutes is timed out. All settings revert to the factory default settings of Cool, 75

degrees F, Timer and Set Hour features are nonfunctional.

Test Mode overrides the three-minute lockout, all delays for compressor and fan motor start /

speed change, and no delay when switching modes.

Test Mode default settings are ON, Money

Saver, 60 degrees F, and High fan speed

Activating Error Code Mode: (Submode of Test Mode) Unit has to be in Test Mode to enter Error

Code Mode

1. Activate Error Code Mode by pressing the "TIMER ON/OFF" button on XQ models. LED for

the "TIMER ON/OFF" will flash 1 bps while Error Code Mode is active. Pressing the "TEMP/

HR + " button will display 00. Consecutive presses will scroll through all error codes logged.

Press the "TEMP/HR - " button to see the reverse order of all error codes logged. When the

end of logged error codes is reached the temperature set point will appear.

Activate Error Code Mode by pressing at the same time the "A/C START" button and the "ON/

OFF" button on QME models. LED for the "TIMER ON/OFF" will flash 1 bps while Error Code

Mode is active. Pressing the "WARMER" button will display 00. Consecutive presses will scroll

through all error codes logged. Press the "COOLER" button to see the reverse order of all

error codes logged. When the end of logged error codes is reached the temperature set point

will appear.

IMPORTANT

Error Codes are cleared from the log by exiting from Error Code Mode. To exit on XQ models,

press Timer On/Off button. To exit QME models, press A/C Start and On/Off buttons. Or unplug

unit to exit Error Code Mode. Plug unit in after 5 seconds to resume normal operation of unit.

RACServMn (7-03)

FRIEDRICH AIR CONDITIONING CO.

Post Office Box 1540 · San Antonio, Texas 78295-1540

4200 N. Pan Am Expressway · San Antonio, Texas 78218-5212

(210) 357-4400 · fax (210) 357-4480

www.friedrich.com

Printed in the U.S.A.

Friedrich Racservmn Users Manual Racservmn(7 17 03)_newest.p65

racservmn Room_Air_Service_Manual

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