Service Manual

2003

Room Air Conditioners

RACServMn (7-03)

2

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

Fresh Air

Capillary Tube

Reversing Valve

(some models)

Front Cover

Compressor

Liquid Filter Driers

Condenser Coil

Discharge Air

System Switches

Evaporator Coil

Return Air Grille/Filter

Blower Wheel

Blower Motor

Outdoor Grille

Sleeve

Basepan

Condenser Fan Blade

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.

UNIT IDENTIFICA

TION

Model Number Code

S S 08 J 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

RAC Serial Number Identification Guide

Serial Number

Decade Manufactured

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

L

A=1

B=2

D=4

E=5

G=7

H=8

Year Manufactured

A=1 D=4 G=7

B=2 E=5 H=8

C=3 F=6 J=9

K=0

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

C G S

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

00001

Production Run Number

PRODUCT LINE

S=RAC

P=PTAC

E=EAC

V=VPAK

H=Split

3

4

PERFORMANCE

DATA*

Cooling

EQ08J11-A

EQ08J11-B

EVAPORATOR AIR

TEMP. DEG. F.

Discharge Temp.

Air Drop F.

EQ PERFORMANCE DATA

OPERATING

PRESSURES

Suction Discharge

ELECTRICAL

Amps

RATINGS

R-22 BREAKER

REFRIG.

FUSE

Locked Charge in 60 Hertz

Rotar Amp OZ.

Amps

50.5

50.5

29.5

29.5

72

74

262

259

7.5

7.5

39.2

39.2

20

20

15

15

DATA*

Cooling

XQ05J10B

XQ06J10-A

XQ06J10-B

XQ07J10-1

XQ08J10-1

XQ08J10-A

EVAPORATOR AIR

TEMP. DEG. F.

XQ PERFORMANCE DATA

OPERATING

PRESSURES

ELECTRICAL

RATINGS

Suction Discharge Amps Discharge Temp.

Air Drop F.

55.45

51.45

51.45

52.22

50.5

50.5

24.55

28.55

28.55

27.95

29.5

29.5

79

82

79

77

72

72

245

262

254

250

262

262

4.6

5.1

5.1

6.5

4.5

4.5

R-22

REFRIG.

BREAKER

FUSE

Locked Charge in 60 Hertz

Rotar Amp OZ.

Amps

34

35

35

37

38

38

20

21

21

24

20

21

15

15

15

15

15

15

PERFORMANCE EVAPORATOR AIR

DATA* TEMP. DEG. F.

Cooling Discharge

Air

Temp.

Drop F.

SQ05J10B-B

SQ06J10B-A

SQ06J10B-B

SQ08J10C-1

55.45

51.45

51.45

50.5

24.55

28.55

28.55

29.5

SQ PERFORMANCE DATA

OPERATING

PRESSURES

ELECTRICAL

RATINGS

Suction Discharge Amps Locked

R-22

REFRIG.

BREAKER

FUSE

Charge in 60 Hertz

Rotar Amp OZ.

Amps

79

82

79

72

245

262

254

262

4.4

5.2

5.2

7.5

34.'0

35.'0

35.'0

39.2

16.'0

15.7

15.7

19.5

15

15

15

15

PERFORMANCE

DATA*

Cooling

KQ05J10B-B

KQ05E10-B

KQ05E10-C

KQ06J10B-A

KQ06J10B-B

KQ06E10-A

KQ06E10-B

YQ06J10B-A

KQ-YQ PERFORMANCE DATA

EVAPORATOR AIR

TEMP. DEG. F.

Discharge Temp.

Air Drop F.

56.34

56.34

56.34

58.02

58.02

58.02

58.02

54.1

28.66

28.66

28.66

21.98

21.98

21.98

21.98

25.9

OPERATING

PRESSURES

Suction

73

79

79

82

80

82

79

81

Discharge

251

245

245

262

269

262

254

267

ELECTRICAL

Amps

5.2

5.2

5.2

5.8

5.8

5.8

5.8

5.7

RATINGS

Locked Charge in 60 Hertz

Rotar Amp OZ.

Amps

29.'0

29.'0

29.'0

35.'0

35.'0

35.'0

35.'0

39.2

R-22 BREAKER

REFRIG.

FUSE

15.'0

15.'0

15.'0

15.'0

19.'0

15.'0

15.'0

19.'0

15

15

15

15

15

15

15

15

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

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

5

6

RS-RM PERFORMANCE DATA

PERFORMANCE

DATA*

Cooling

RS10J10-C

RS12J10A-B

RS15J10-A

RS16J30A-A

RS18J30-A

RM24J30-A

EVAPORATOR AIR

TEMP. DEG. F.

Discharge Temp.

Air Drop F.

61

57

57

56.5

56

57

19

23

23

24

24

23.65

OPERATING

PRESSURES

ELECTRICAL

RATINGS

Suction Discharge Amps Locked

R-22

REFRIG.

Charge in

Rotar Amp OZ.

BREAKER

FUSE

60 Hertz

Amps

82

83

77

77

72

68

248

271

279

296

293

301

7.5

9.8

11.1

7.2

8.7

12.2

44

54

42

42

42

44

26

30

29.5

30

48

54

15

15

15

15

15

15

YS-YM-YL PERFORMANCE DATA

PERFORMANCE

DATA*

Cooling

YS09J10B-A

YS12J33-A

YM18J34B-A

YL24J35C-A

EVAPORATOR AIR

TEMP. DEG. F.

Discharge Temp.

Air Drop F.

59

56

53

55

21

24

27

25

OPERATING

PRESSURES

Suction Discharge

ELECTRICAL

RATINGS

Amps

R-22 BREAKER

REFRIG.

FUSE

Locked Charge in 60 Hertz

Rotar Amp OZ.

Amps

90

80

74

72

243

264

284

260

7.7

5.2/5.6

8.7/9.2

10.0/12.0

39.2

30

42

61

25

28

54

74

15

20

30

30

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

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

PERFORMANCE

DATA*

Cooling

ES12J33B-A

ES16J33A-A

EM18J34B-A

EL25J35-A

EL35J35-A

EL35J35-B

EVAPORATOR AIR

TEMP. DEG. F.

Discharge Temp.

Air Drop F.

58

53

22

27

55

55

52

52

25

25

28

28

OPERATING

PRESSURES

Suction Discharge

ELECTRICAL

RATINGS

Amps

R-22 BREAKER

REFRIG.

FUSE

Locked Charge in 60 Hertz

Rotar Amp OZ.

Amps

82

77

71

75

72

72

265

269

267

284

317

317

5.76.6

7.5/8.0

8.6/9.2

26.3

42.'0

42.'0

11.5/12.6

61.'0

18/20

18/20

94.'0

94.'0

28

30

40.5

48.5

60

60

20

20

30

30

30

30

PERFORMANCE Heat Rise

DATA heating

ES12J33B-A

ES16J33A-A

EM18J34B-A

EL25J35-A

EL35J35-A

EL35J35-B

30.5

30.5

28.3

28.6

22.9

22.9

16/14.7

16/14.7

19.5/17

24/22/4

24/22.4

24/22.4

DATA*

Cooling

KS10E10-A

KS10J10-B

KS12E10-A

KS12J10B-A

KS15J10-A

KS12J30B-A

KS18J30-A

KM20J30-A

KM24J30-A

61

61

57

57

55.78

57

56

55

55

19

19

23

23

KS-KM PERFORMANCE DATA

EVAPORATOR AIR

TEMP. DEG. F.

Discharge Temp

Air Drop F.

23.52

23

24

24

25

OPERATING

PRESSURES

82

80

83

84

77

76

72

70

68

248

263

271

268

279

285

293

279

301

ELECTRICAL

RATINGS

Amps

R-22 BREAKER

REFRIG.

FUSE

Locked Charge in 60 Herts

Rotar Amp OZ.

Amps

9.1

9.1

10.8

10.8

12.'0

6.2

8.7

9.9

15.'0

48.3

48.3

54.'0

54.'0

67.'0

26.'0

48

48

71.'0

26.08

26.88

28

28

29.5

30.08

48

48

54.08

15

15

15

15

15

15

15

15

15

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

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

7

8

SS PERFORMANCE DATA

PERFORMANCE

DATA*

Cooling

SS08J10R-B

SS08J10R-A

SS09J10C-A

SS10J10AR-A

SS12J10AR-B

SS14J10R-A

SS12J30D-A

SS16J30A-A

SS18J30R-A

EVAPORATOR AIR

TEMP. DEG. F.

Discharge Temp.

Air Drop F.

61.4

61.4

18.6

18.6

57.8

57.22

57.2

57.22

57.2

56.9

56.9

22.2

22.78

22.8

22.9

22.8

23

23

OPERATING

PRESSURES

Suction Discharge

ELECTRICAL

RATINGS

Amps

R-22 BREAKER

REFRIG.

FUSE

Locked Charge in 60 Hertz

Rotar Amp OZ.

Amps

87

84

82

84

83

77

82

77

77

251

248

254

245

271

279

265

296

293

6.7

6.7

7.4

7.5

9.8

12

5.0/5.2

7.5/8.0

8.1/8.7

29

36.2

44

42

44

61

21

28

45

39.'0

24.'0

22.6

26.'0

30.'0

29.5

27.5

30.'0

48

15

15

15

15

15

15

20

20

20

SM-SL PERFORMANCE DATA

PERFORMANCE

DATA*

Cooling

SM20J30-A

SM24J30-A

SL25J30-A

SL28J30B-A

SL35J30-A

SL35J30-B

EVAPORATOR AIR

TEMP. DEG. F

Discharge Temp

Air Drop F.

52.58

54.86

52.32

52.1

52.93

52.93

27.42

25.14

27.68

26.9

27.07

27.07

OPERATING

PRESSURES

Suction Discharge

ELECTRICAL

RATINGS

Amps

R-22 BREAKER

REFRIG.

FUSE

Locked Charge in 60 Hertz

Rotar Amp OZ.

Amps

70

68

75

74

72

72

279

301

284

278

317

317

9.9

12.2

11.5/12.6

13.0/14.2

18.0/20.0

18.0/20.0

43

68

68

88

92

92

47

54

48.5

50

60

60

20

20

20

20

30

30

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

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

WS PERFORMANCE DATA

PERFORMANCE

DATA*

Cooling

WS07A10E-B

WS07A10E-C

WS07A10E-D

WS10A10-A

WS10A10-B

WS12A10E-B

WS13A10-A

WS09A30E-B

WS12A30E-A

WS12A30E-B

WS15A30-A

EVAPORATOR AIR

TEMP. DEG. F.

Discharge Temp.

Air Drop F.

59.5

59.5

59.5

58

58

55

55

58

47.1

46

47

19.5

19.5

19.5

22

22

25

25

22

32.9

33

33

OPERATING

PRESSURES

ELECTRICAL

RATINGS

Suction Discharge Amps Locked

R-22

REFRIG.

Charge in

Rotar Amp OZ.

BREAKER

FUSE

60 Hertz

Amps

83

81

79

86

84

85

85

83

80

80

72

300

299

299

307

307

290

281

302

308

305

310

7.'0

7.'0

7.'0

9.8

9.8

11.9

12

4.7

11.9

11.9

8.5

32

32

32

48

48

54

55

44

54

54

42

19

28

20

25

26

28.5

36

22

27.5

42

43.5

15

15

15

15

15

15

15

15

15

15

15

WE-WY PERFORMANCE DATA

DATA*

Cooling

WE09A33E-C

WE12A33E-B

WE15A33-A

WY09A33F-A

WY12A33G-A

EVAPORATOR

TEMP. DEG. F.

Discharge Temp.

Air Drop F.

58 22

55

47.1

58

55

25

32.9

22

25

OPERATION

PRESSURES

ELECTRICAL

RATINGS

Suction Discharge Amps Locked

R-22

REFRIG.

Charge in

Rotar Amp OZ.

BREAKER

FUSE

60 Hertz

Amps

86

80

71

83

81

302

308

310

288

295

4.7

6.5

8.5

4.3

6.2

44

54

42

44

54

23

27.5

43.5

24

37

20

20

20

20

20

PERFORMANCE Heat Rise

DATA heating

WE15A33-A

WE09A33E-C

WE12A33E-B

40

39

36

16.2

14.7

14.7

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

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

9

10

SPECIFICATIONS

BTUH (Cooling)

E.E.R. (Cooling)

Volts

Amperes (Cooling)

Total Watts (Cooling)

Hertz

Fuse/Breaker Size

Fan RPM

Evaporator Air CFM

Dehumidification Pts/Hr

Width

Height

Depth

Minimum Ext. Into Room

Minimum Ext. To Outside

Net Weight

Shipping Weight

SC06H10E

5950

8.0

115

6.8

760

60

15

1595

125

2.0

14

11/16

"

10

13/16

"

27"

2½"

15½"

70

80

PERFORMANCE DATA*

DISCHARGE

EVAPORATOR AIR

TEMP. °F

OPERATING

PRESSURES

AIR

TEMP

DROP °F

SUCTION

DISCHARGE

AMPS

ELECTRICAL

RATINGS

R-22

REFRIG.

COMP.

OIL

LOCKED

ROTOR AMPS

CHARGE IN

OUNCES

CHARGE IN

FLUID OZ.

* Rating Conditions:

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

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

SC06H10E

56.1

23.9

72

293

6.8

35.0

14

9.8

PERFORMANCE DATA

(Heating)

AHAM

@ 70°F Inside 47°F Outside

@ 70°F Inside 35°F Outside

Evaporator Air Temperature Rise

@ 70°F Inside 47°F Outside

@ 70°F Inside 35°F Outside

AMPS

Watts

@ 70°F Inside 47°F Outside

@ 70°F Inside 35°F Outside

@ 70°F Inside 47°F Outside

@ 70°F Inside 35°F Outside

Suction/Head PSIG

@ 70°F Inside 47°F Outside

*YS09J10B-A **YS12J33-A **YM18J34A-A **YL24J35C-A

8300

19.62

6.7

760

53.5/222

12400/12300

10700/8900

31.38

28.69/23.87

6.0/6.5

16.0/14.7

1340/1300

3500/2900

52.5/251

17200/17200

13000/10600

24.74

24.46/20.22

8.5/9.0

19.5/17.0

1880/1820

5500/4650

53/225

23000/22800

17300/14300

31.71

24.38/20.16

10.4/11.5

24.0/22.4

2350/2340

5500/4650

54/236.5

* Do not operate below 37° ambient.

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

PERFORMANCE DATA

(Heating)

BTUH @70°F Inside 62°F Outside

@70°F Inside 57°F Outside

@70°F Inside 52°F Outside

** @70°F Inside 47°F Outside

@70°F Inside 42°F Outside

@70°F Inside 37°F Outside

@70°F Inside 35°F Outside

Evaporator Air Temperature Rise

@70°F Inside 62°F Outside

@70°F Inside 57°F Outside

AMPS

@70°F Inside 52°F Outside

** @70°F Inside 47°F Outside

@70°F Inside 42°F Outside

@70°F Inside 37°F Outside

@70°F Inside 35°F Outside

@70°F Inside 62°F Outside

Watts

@70°F Inside 57°F Outside

@70°F Inside 52°F Outside

** @70°F Inside 47°F Outside

@70°F Inside 42°F Outside

@70°F Inside 37°F Outside

@70°F Inside 35°F Outside

@70°F Inside 62°F Outside

@70°F Inside 57°F Outside

@70°F Inside 52°F Outside

** @70°F Inside 47°F Outside

@70°F Inside 42°F Outside

@70°F Inside 37°F Outside

@70°F Inside 35°F Outside

Suction/Head PSIG

@70°F Inside 62°F Outside

@70°F Inside 57°F Outside

@70°F Inside 52°F Outside

** @70°F Inside 47°F Outside

@70°F Inside 42°F Outside

@70°F Inside 37°F Outside

@70°F Inside 35°F Outside

*WY09A33F-A

9700

9300

8800

8200/8100

7600

6800

11000/9100

32.00

30.75

29.10

27.10/26.80

25.10

22.50

36.40/30.10

4.0

3.9

3.85

3.8/4.1

3.6

3.4

16.0/14.7

880

870

860

835/810

800

760

3550/2950

66/315

62/285

57/285

53/265

49/215

45/203

44/200

*WY12A33F-A

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

** AHAM Rating Conditions.

12400

12000

11400

10800/10400

10000

9000

11000/9100

61/325

59/290

53/275

49/255

45/240

41/220

40/215

37.60

36.40

34.50

32.70/31.50

30.30

27.30

33.30/27.60

5.6

5.5

5.4

5.3/5.6

5.1

4.8

16.0/14.7

1280

1260

1220

1175/1155

1130

1070

3550/2950

11

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 System

Sequence of Operation

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.

Suction

Line

Evaporator

Coil

Metering

Device

Refrigerant

Dryer

Discharge

Line

Condenser

Coil

Compressor

Refrigerant

Drier

Liquid

Line

12

Electrical Rating T ables

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,

125V - 15A 5 - 15P

SS12J10AR, SS14J10R, SC06H10D,

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

Electric shock hazard.

Turn off electric power before service or installation.

Wire Size

Use ONLY wiring size recommended for single outlet branch circuit.

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.

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.

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

Grounding

Receptacle

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.

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.

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.

13

COMPONENTS:

OPERATION & TESTING

WARNING

DISCONNECT ELECTRICAL POWER TO

UNIT BEFORE SERVICING OR TESTING

Figure 2

Typical Ground Test

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.

Figure 1

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.)

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.

Figure 3- External Overload

GROUND TEST

Use an ohmmeter set on its highest scale. Touch one lead to the compressor body (clean point of contact as a good connection is a must) and the other probe in turn to each compressor terminal (see Figure 2.) If a reading is obtained, the compressor is grounded and must be replaced.

14

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.

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.

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.

CHECKING THE INTERNAL OVERLOAD

(See Figure 4)

Figure 5

Fan Motor

Figure 4

Internal Overload

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 6

System Control Panel (SQ Models Only)

1.

With no power to unit, remove the leads from the compressor 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 overload is located inside the motor to protect against high temperature and high amperage conditions. (See Figure 5)

15

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".

Rocker Switch

Figure 8

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.

Figure 7

System Switch

(SQ 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 cooling 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.

Figure 9

System Control Panel (XQ 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."

16

SYSTEM CONTROL PANEL

("KQ" Models Only- See Figure 10)

The KQ Model unit uses a five position control switch to regulate the operation of the unit. Function of each position (clockwise rotation) is as follows:

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.

Figure 10

System Control Panel (KQ Models Only)

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.

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 filtered 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 12

System Control Panel (EQ Models only)

SYSTEM CONTROL SWITCH - TEST (See Figure 11) Turn knob to phase of switch to be tested. There must be continuity as follows:

SYSTEM CONTROL SWITCH – TEST (See Figure 13)

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)

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”

17

Figure 13

System Control Switch

(EQ Models)

B1

L1

L2

MS

LO

H C

2

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:

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.

Figure 14

System Control Panel (YQ Model Only)

Figure 15

System Control Switch

(YQ Model Only)

Figure 16

System Control Panel (SC Model Only)

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".

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".

18

Figure 16

System Control Switch

(SC Model Only)

Figure 19

System Control Switch

(WS Models)

1.

Disconnect leads from control switch.

2.

Check continuity between all switch positions shown in

Figure 17.

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.

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

The fan motor can also be operated independently on medium speed. See switch section as indicated on decorative control panel.

Figure 20

System Control Panel

(WE & WY Models)

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."

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.

4.

5.

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

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

"Hi Cool" Position-between terminals "C" and "3", "C2" and "2", "H" and "M/S", "AR" and "5".

"Hi Heat" Position-between terminals "C" and "1", "C2" and "4", "H" and "M/S", "AR" and "5".

19

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 21

System Control Switch

Heat Pump / Electric Heat

(WE & WY Models)

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

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.

Figure 22

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

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.

Figure 24

System Control Panel - Deluxe Series (RS & RM)

20

SYSTEM CONTROL SWITCH - TEST

Disconnect leads from control switch (See Figure 25)

There must be continuity as follows:

Figure 25

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.

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.

2.

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

3.

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

Figure 27

System Control Panel

Heat Pump & Electric Heat Models

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

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.

Figure 26

System Control Switch

21

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.

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.

"Off" Position - no continuity between terminals.

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

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 28

System Control Switch

(Heat Pump / Electric

Heat Models Figure 29

Electronic Control

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.

22

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.

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.

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.

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:

23

(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 30

Thermostat

Figure 31

Thermostat

(YQ Models Only)

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 ("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. Thermostat malfunction or erratic operation is covered in the troubleshooting 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.

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 - 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.

24

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.

Figure 34

Thermostat Bulb Location

(KQ, YQ & SC Models Only)

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

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.

Figure 32

Thermostat

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 4way valve will not reverse.

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)

Figure 35

Defrost Thermostat

(Heat Pump Models)

Figure 33

Thermostat Bulb Location

(SQ 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

25

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.

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.

Figure 36

Defrost Thermostat Bulb

Location (All Heat Pump Models)

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.

Retainer

Figure 38

Dual Rated Run Capacitor Hook-up

Slide the bulb end of the thermostat defrost under the retainer as shown

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

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

(C) terminal and the other probe to the compressor

(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.

Figure 37

Resistor

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.

26

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

Figure 40

Figure 39

One-way Check Valve

(Heat Pump Models)

(TO INDOOR COIL)

(TO OUTDOOR COIL)

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.

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 refrigerant will also be directed through the cooling capillary tubes in a continuous loop during the heating mode).

Figure 41

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 condenser (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).

(TO INDOOR COIL)

(TO OUTDOOR COIL)

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.

27

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

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.

TESTING REVERSING VALVE

Occasionally, the reversing valve may stick in the heating or cooling position or in the mid-position.

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.

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.

Figure 43

Bellows Assembly

Drain Pan 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

28

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.

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.

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.

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.

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.

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.

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.

SEALED REFRIGERATION SYSTEM REPAIRS

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.

IMPORTANT

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.

EQUIPMENT REQUIRED

1. Voltmeter

The heater element has a high limit control. This control is a bimetal thermostat mounted in the top of the heating element.

2. Ammeter

3. Ohmmeter

Figure 44 - Heating Element

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)

29

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 system.

11.

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.

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.

4. Accurately weighing the refrigerant charge actually introduced into the system.

5. Facilities for flowing nitrogen through refrigeration tubing during all brazing processes.

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.

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.)

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.

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.

3.

4.

5.

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.

Reassemble the system, including new drier strainer and capillary tube.

Proceed with processing as outlined under hermetic component replacement.

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.

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.

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.

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.

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

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.

30

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.

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.

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.

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.

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.

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.

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.

7.

8.

Start unit, and verify performance.

Crimp the process tube and solder the end shut.

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.

Undercharged Refrigerant Systems

An undercharged system will result in poor performance (low pressures, etc.) in both the heating and cooling cycle.

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.

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).

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.

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.

Gauges connected to system with an undercharge will have low head pressures and substantially low suction pressures.

31

NOTE: Heat pump refrigeration drawing

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.

An over charge can cause the compressor to fail, since it would be "slugged" with liquid refrigerant.

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.

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.

32

Restricted Refrigerant System

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.

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.

33

Routine Maintenance

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

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

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.

34

Troubleshooting Touch Test Chart: To Service Reversing Valves

NORMAL FUNCTION OF VALVE

NOTES:

VALVE

OPERATING

CONDITION

* TEMPERATURE OF VALVE BODY

** WARMER THAN VALVE BODY

Apparent leap in heating.

Will not shift from heat to cool.

3 4 5 6

Hot,

as (1)

Hot,

as (1)

*TVB

Hot

Warm, as (1)

Hot

*TVB

*TVB

Cool,

as (2)

Cool,

as (2)

Cool,

as (2)

*TVB

**

WVB

*TVB

Cool, as (2)

Cool, as (2)

Hot

Warm *TVB

POSSIBLE CAUSES CORRECTIONS

Normal

Cooling

Hot Cool

Normal Heating Hot Cool

Valve will not shift from cool to heat.

Hot

Cool Hot *TVB as (2) as (1)

Hot Cool *TVB as (1) as (2)

TVB

TVB

Cool

Cool, as (2)

Hot, as (1)

MALFUNCTION OF VALVE

Check Electrical circuit and coil

Check refrigeration charge

*TVB Hot

No voltage to coil.

Defective coil.

Low charge.

Pressure differential too high.

Pilot valve okay. Dirt in one bleeder hole.

Valve will not shift from cool to heat.

Starts to shift but does not complete reversal.

from Compressor

DISCHARGE TUBE

1 2

SUCTION TUBE to Compressor

Hot

Hot

Warm

Hot

Hot

Hot

Hot

Hot

Hot

Hot

Hot

Hot

Hot

Warm

Cool

Cool

Cool

Warm

Warm

Hot

Hot

Cool

Cool

Cool

Cool

Cool

Cool

Cool

Cool,

as (2)

Cool,

as (2)

Cool,

as (2)

Warm

Warm

Hot

Hot,

Hot, as (1)

Hot,

as (1)

Hot, as (1)

Hot, as (1)

Hot,

as (1)

Hot, as (1)

Warm, as (1)

Hot

Hot

Hot

Cool, as (2)

Cool,

as (2)

Hot

*TVB

Hot

Hot

Hot

*TVB

Hot

Warm

Hot

Hot

Hot

Hot

*TVB

**

WVB

*TVB

*TVB

*TVB

Hot

Piston cup leak

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.

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.

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

35

36

Troubleshooting: Cooling

PROBLEM

Compressor does not run.

PROBLEM

Fan motor does not run.

POSSIBLE CAUSE

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.

TO CORRECT

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.

POSSIBLE CAUSE

Inoperative system switch.

Broken, loose or incorrect wiring.

Open Capacitor.

Fan speed switch open.

Inoperative fan motor.

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.)

PROBLEM

Does not cool, or cools only slightly.

POSSIBLE CAUSE

Undersized unit.

Thermostat open or inoperative.

TO CORRECT

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.

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.

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.

PROBLEM

Unit does not run.

Fuse blown or circuit tripped.

Power cord not plugged in.

System switch in "Off" position.

Inoperative system switch.

Loose or disconnected wiring at switch or other components.

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.

PROBLEM

Evaporator coil freezes up.

POSSIBLE CAUSE

Dirty filter.

Restricted air flow.

Inoperative thermostat.

Short of refrigerant.

Inoperative fan motor.

Partially restricted capillary.

PROBLEM

Compressor runs continually.

POSSIBLE CAUSE

Excessive heat load.

Restriction in line.

Refrigerant leak.

Does not cycle off.

Thermostat contacts stuck

Thermostat incorrectly wired.

PROBLEM

Thermostat does not turn unit off.

POSSIBLE CAUSE

Thermostat contacts stuck.

Thermostat set at coldest point.

Incorrect wiring.

Unit undersized for area to be cooled.

TO CORRECT

Clean as recommended in Owner’s Manual.

Check for dirty or obstructed coil - clean as required.

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 temperature. Test for low running current.

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.

TO CORRECT:

Replace thermostat.

Turn to higher temperature setting to see if the unit cycles off.

Refer to appropriate wiring diagram.

Refer to Sizing Chart.

PROBLEM

Compressor attempts to start, or runs for short periods only.

Cycles on overload.

POSSIBLE CAUSE

Overload inoperative. Opens too soon.

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.

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.

PROBLEM

Thermostat does not turn unit on.

POSSIBLE CAUSE

Loss of charge in thermostat bulb.

Loose or broken parts in thermostat.

Incorrect wiring.

TO CORRECT

Place jumper across thermostat terminals to check if unit operates. If unit operates, replace thermostat.

Check as above.

Refer to appropriate wiring diagram.

37

38

PROBLEM

Noisy operation.

POSSIBLE CAUSE

Poorly installed unit.

Fan blade striking chassis.

Compressor vibrating.

Improperly mounted or loose cabinet parts.

TO CORRECT

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.

PROBLEM

PROBLEM

Thermostat short cycles.

POSSIBLE CAUSE

Evaporator drain pan overflowing.

Condensation forming on base pan.

Water leaks into room.

Poor installation resulting in rain entering room.

Condensation on discharge grilles.

TO CORRECT

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.

POSSIBLE CAUSE

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.

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.)

PROBLEM

Prolonged off-cycles.

(automatic operation)

POSSIBLE CAUSE

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.

TO CORRECT

Refer to appropriate wiring diagram.

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.

PROBLEM

Switches from cooling to heating.

POSSIBLE CAUSE

Thermostat sticking.

Incorrect wiring.

TO CORRECT

Change room thermostat.

Refer to appropriate wiring diagram.

PROBLEM

Outside water leaks.

POSSIBLE CAUSE

Evaporator drain pan cracked or obstructed.

Water in compressor area.

Obstructed condenser coil.

Fan blade and slinger ring improperly positioned.

TO CORRECT

Repair, clean or replace as required.

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.

PROBLEM

High indoor humidity.

POSSIBLE CAUSE

Insufficient air circulation in air conditioned area.

Oversized unit.

Inadequate vapor barrier in building structure, particularly floors.

TO CORRECT

Adjust louvers for best possible air circulation

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

Advise customer.

39

40

Troubleshooting: Heating

(Heat pumps)

PROBLEM

No heating — fan operates.

PROBLEM

Insufficient heating.

POSSIBLE CAUSE

Thermostat setting.

Defective thermostat.

Compressor not operating.

Defective system switch.

POSSIBLE CAUSE

Restricted filter.

Outdoor thermostat.

(Applicable models.)

PROBLEM

Fan operates in

"constant" position, but not in "automatic"

(MoneySaver).

Fresh air or exhaust door open.

POSSIBLE CAUSE

Inoperative system switch.

Incorrect wiring.

PROBLEM

Temperature varies from comfortable to overly warm.

POSSIBLE CAUSE

Defective thermostat.

Heat anticipator (resistor) shorted.

(Applicable models)

PROBLEM

Room temperature uneven.

(Heating cycle)

TO CORRECT

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

TO CORRECT

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

Check continuity of switch.

Check applicable wiring diagram.

POSSIBLE CAUSE

Heat anticipator (resistor) shorted.

(Applicable models.)

Wide differential — partial loss of thermostat bulb charge.

Incorrect wiring.

TO CORRECT

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.

TO CORRECT

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.

PROBLEM

Unit will not defrost.

POSSIBLE CAUSE

Incorrect wiring.

Defrost control timer motor not advancing.

Defrost control out of calibration.

Defrost control contacts stuck.

Defrost control bulb removed from coil, or not making good coil contact.

TO CORRECT

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.

PROBLEM

Unit does not heat adequately.

POSSIBLE CAUSE TO CORRECT

Outdoor thermostat does not cut off compressor at the preselected temperature and bring on heating element.

Fresh air or exhaust door open.

Defective thermostat - replace.

Dirty filter.

Unit undersized.

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.

PROBLEM

Unit cools when heat is called for.

POSSIBLE CAUSE

Incorrect wiring.

Defective solenoid coil.

Reversing valve fails to shift.

Inoperative system switch.

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.

PROBLEM

Unit does not heat adequately.

POSSIBLE CAUSE

Outdoor thermostat does not cut off compressor at the preselected temperature and bring on the heating element.

TO CORRECT

Defective thermostat — replace.

Fresh air or exhaust door open.

Dirty filter.

Unit undersized.

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.

PROBLEM

Unit cools when heat is called for.

POSSIBLE CAUSE

Incorrect wiring.

Defective solenoid coil.

Reversing valve fails to shift.

PROBLEM

Cooling is adequate, but heating is insufficient.

Inoperative system switch.

POSSIBLE CAUSE

Heating capillary tube partially restricted.

Check valve leaking internally.

Reversing valve failing to shift completely — bypassing hot gas.

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.

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, energize solenoid to break loose. If valve fails to make complete shift, replace valve.

41

PROBLEM

Compressor will not turn off and operate on heating element only during low outside ambients.

POSSIBLE CAUSE

Outdoor thermostat.

(Applicable models.

)

PROBLEM POSSIBLE CAUSE

Fuse link.

Compressor shuts off on outdoor thermostat but element does not heat.

Heating element shorted.

Incorrect wiring.

TO CORRECT

Refer to the heating data on applicable models for the preselected temperature the compressor shuts off and the electric element is energized.

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.

42

Troubleshooting: Heating

(Cooling/Electric Models)

PROBLEM

Fan Operates – heating element does not come on.

PROBLEM

Heating inadequate.

POSSIBLE CAUSE

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.

POSSIBLE CAUSE

Restricted filter.

Cycling high limit control.

Exhaust or fresh air door open.

PROBLEM

POSSIBLE CAUSE

Fan relay contacts open.

Fan operates in "Constant" position, but not in

"Automatic" (Money-

Saver).

Inoperative system switch.

Loose connection.

TO CORRECT

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.

TO CORRECT

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.

TO CORRECT

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.

PROBLEM

POSSIBLE CAUSE

Heat anticipator (resistor) shorted.

Long "off" and "on" cycles.

Defective thermostat.

PROBLEM

Fan motor does not operate in "Constant" or "MoneySaver" position.

POSSIBLE CAUSE

Defective motor.

Open or shorted capacitor.

Condenser fan frozen to base pan.

Loose connections.

TO CORRECT

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.

TO CORRECT

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.

PROBLEM

Cooling adequate, heating insufficient.

POSSIBLE CAUSE

Heating capillary tube partially restricted.

Check valve leaking internally.

Reversing valve failing to shift completely – bypassing hot gas.

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 specification 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.

43

44

PROBLEM

Compressor will not turn off and operate on heating element only during low outside ambients.

POSSIBLE CAUSE

Outdoor thermostat.

(Applicable models.)

TO CORRECT

Refer to the heating data on applicable models for the preselected temperature the compressor shuts off and the electric element is energized.

Low Suction Pressure

Low Load Conditions

Low Air Flow Across

Indoor Coil

Refrigerant System

Restriction

Undercharged

Moisture in System

Troubleshooting Chart — Cooling

REFRIGERANT SYSTEM

DIAGNOSIS COOLING

High Suction Pressure

High Load Conditions

High Air Flow Across

Indoor Coil

Reversing Valve not

Fully Seated

Overcharged

Defective Compressor

Low Head Pressure

Low Load Conditions

Refrigerant System

Restriction

Reversing Valve not

Fully Seated

Undercharged in System

Defective Compressor

High Head Pressure

High Load Conditions

Low Air Flow Across

Outdoor Coil

Overcharged

Noncondensables (air)

Troubleshooting Chart — Heating

Low Suction Pressure

Low Airflow

Across Outdoor Coil

Refrigerant System

Restriction

Undercharged

Moisture in System

REFRIGERANT SYSTEM

DIAGNOSIS – HEATING

High Suction Pressure

Outdoor Ambient Too High

for Operation in Heating

Low Head Pressure

Refrigerant System

Restriction

Reversing Valve not

Fully Seated

Overcharged

Defective Compressor

Reversing Valve not

Fully Seated

Undercharged

Defective Compressor

High Head Pressure

Outdoor Ambient Too High

For Operation In Heating

Low Airflow Across

Indoor Coil

Overcharged

Noncondensables (air) in

System

Electrical Troubleshooting Chart

(Heat Pump)

HEAT PUMP

SYSTEM COOLS WHEN

HEATING IS DESIRED.

Is the Selector Switch

Set for Heat?

Is Line Voltage

Present at the Solenoid

YES

Is the Solenoid Coil Good?

YES

Reversing Valve Stuck

NO

NO

Replace the Solenoid Coil

Replace the Reversing Valve

45

46

MODELS

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

COMPRESSOR

S

C

R

COMPRESSOR

TERMINAL

ORIENTATION

MAY VARY.

REFER TO

MARKINGS ON

COMPRESSOR

OVERLOAD

PROTECTOR

S

C

R

RED

BLACK

ALTERNATE

COMPRESSOR

BLACK

RED

TO CAPACITOR

BRACKET

BLUE

COMPRESSOR

WIRE HARNESS

CAPACITOR c

FAN

HERM

ANTICIPATOR

RESISTOR

BLACK

WHITE

BROWN

BLUE

WIRING DIAGRAM

RED

PURPLE

BLUE

SWITCH

SYSTEM

2

C

L1

H

M

MS

LO LL

SWITCH,

ROCKER (GE)

THERMOSTAT

BLACK

BLUE

ORANGE

RED

SUPPLY CORD

TO CHASSIS

OR GREEN/YELLOW

TO INNERWALL/

MOTOR MOUNT

FAN

MOTOR

TO CAPACITOR

BRACKET

SCHEMATIC

L1

L2

MS

3

YES

2

1

N0

L1

MS

3

SYS SW

6

4

5

1

AR

C

2

IDT

1

OVLD

C

2

M

L

LL

2

H

HIGH

MEDIUM

LOW

OVLD

R

COMPR

S

HERM

CAP

C

S

R

MTR

FAN

CAP

C

SWITCH LOGIC

SWITCH POSITION

OFF

LOW COOL

MED COOL

HI COOL

FAN ONLY

LL COOL

X = CLOSED

0 = OPEN

CIRCUIT

1 2 3 4

O O O O

X O

X O

X O

O O

O

X

X

O

O X O O

X O O O

5

O

O

O

6

O

X O

O O

O O

O

X

AR

MS

CAP

COMPR

MTR

OVLD

SYS SW

IDT

L E G E N D

- ANTICIPATOR RESISTOR

- MONEY SAVER/ROCKER SWITCH

- CAPACITOR

- COMPRESSOR

- FAN MOTOR

- OVERLOAD PROTECTOR

- SYSTEM SWITCH

- INDOOR THERMOSTAT

- GROUND LEAD

- COMBINATION TERMINAL

- PLASTIC INSULATOR

PART NO.

619-405-00

REV

00

MODELS

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

WIRING DIAGRAM

COMPRESSOR

S

C

R

NOTE:

OPTIONAL

CONFIGURATION

"F"

"F"

C

R

S

"F"

HARNESS, COMPR.

RED

PURPLE

BLUE

BROWN

3

2

1

SWITCH

ROCKER (GE)

L

M

MS

C

2

L1 H

BLUE

SWITCH

SYSTEM

ANTICIPATOR

RESISTOR

RED

BLUE

THERMOSTAT

BLACK

CAPACITOR

C

FAN HERM

WHITE

BROWN

TO INNERWALL/

MOTOR MOUNT

FAN

MOTOR

RED

BLUE

BLACK

SUPPLY CORD

TO CAPACITOR

BRACKET

SCHEMATIC

L1

L1

MS

3

NO

2

1

YES

MS

3

SYS SW

4

5

1

AR

C

2

IDT

1

OVLD

C

2

M

L

2

H

HIGH

MEDIUM

LOW

OVLD

R

COMPR

S

HERM

CAP

C

R

S

MTR

FAN

CAP

C

L2

SWITCH LOGIC

SWITCH POSITION

OFF

LOW COOL

MED COOL

HI COOL

FAN ONLY

X = CLOSED

0 = OPEN

CIRCUIT

1 2

O O

X O

X O

X O

O X

O

X

O

3

O

O

X

O

O

4 5

O

O

O

X

O

O

O

AR

MS

CAP

COMPR

MTR

OVLD

SYS SW

IDT

L E G E N D

- ANTICIPATOR RESISTOR

- MONEY SAVER/ROCKER SWITCH

- CAPACITOR

- COMPRESSOR

- FAN MOTOR

- OVERLOAD PROTECTOR

- SYSTEM SWITCH

- INDOOR THERMOSTAT

- GROUND LEAD

- COMBINATION TERMINAL

- PLASTIC INSULATOR

PART NO.

619-142-15

REV.

01

47

48

MODELS

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

WIRING DIAGRAM

WIRE HARNESS

PTCR

(OPTIONAL)

BLACK

BLACK

RED

CAPACITOR

FAN

C

HERM

WHITE

FAN MOTOR

BROWN

RED

BLACK

BLUE

RED

BLACK

S

C

R

COMPRESSOR

GREEN/YELLOW

THERMOSTAT

2

BLACK

BLACK

1

L

H

C

L1

SYSTEM SWITCH

TO GND

SCREW

SMOOTH (OR BROWN) CONDUCTOR

SEE DETAIL " A "

SUPPLY CORD

SYSTEM SWITCH SEQUENCE

CW ROT CONNECTION

ALL OPEN

OFF

HI FAN

LO FAN

LO COOL

HI COOL

L1-H

L1-L

L1-L,L1-C

L1-H,L1-C

LINE

SYSTEM SWITCH

SCHEMATIC

L1

DETAIL " A " OPTIONAL WIRING

RED

2

BLK

BLK

ANTI-ICE

CONTROL

BLK

L H C

1

L1

WHITE

THERMOSTAT

BLACK

SYSTEM SWITCH

DETAIL " B " OPTIONAL SCHEMATIC

ANTI-ICE

CONTROL

L H C

RED

BLACK

T\STAT

L H C

RED

BLACK

FAN MOTOR

BROWN

F

WHITE

LEGEND:

LINE

= OPTIONAL FACTORY WIRING

SEE DETAIL "B"

CAPACITOR

C

PTCR (OPTIONAL)

H S

COMPRESSOR

RIBBED CONDUCTOR

PTCR = START ASSIST DEVICE

T/STAT

C

OLVD

R

PART NO.

619-046-01

REV.

01

MODELS

KQ08J10B-1, KQ08J10B-A, KQ08J10C-A

WIRING DIAGRAM

04

1

C

NOTE:

OPTIONAL

CONFIGURATION

R

C

S

WIRE HARNESS

PTCR

(OPTIONAL)

BLACK

BLACK

THERMOSTAT

2

1

BLK

BLACK

GREEN

RED

BLUE

BLUE

TO GND

SCREW

BROWN

BROWN

SEE DETAIL " A "

SUPPLY CORD

SYSTEM SWITCH SEQUENCE

CW ROT CONNECTION

OFF

HI FAN

LO FAN

LO COOL

HI COOL

ALL OPEN

L1-H

L1-L

L1-L,L1-C

L1-H,L1-C

LINE

SYSTEM SWITCH

SCHEMATIC

L1

CAPACITOR

C

HERM

BLACK

FAN

RED

L

H

C

L1

SYSTEM SWITCH

WHITE

BROWN

RED

BLACK

FAN MOTOR

DETAIL " A " OPTIONAL WIRING

04

RED

2

1

BLK

BLK OR

ANTI-ICE

CONTROL

BLK OR

RED RED

THERMOSTAT

BROWN

L

H C

L1

BLACK

SYSTEM SWITCH

DETAIL " B " OPTIONAL SCHEMATIC

ANTI-ICE

CONTROL

L H C

RED

BLACK

T/STAT

L H C

RED

BLACK

FAN MOTOR

BRN

F

WHITE

LEGEND:

LINE

= OPTIONAL FACTORY WIRING

SEE DETAIL "B"

CAPACITOR

C

PTCR (OPTIONAL)

H S

COMPRESSOR

BLUE

PTCR = START ASSIST DEVICE

T\STAT

C

OLVD

R

PART NO.

617-581-04

REV.

04

49

50

MODELS

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

COMPRESSOR

R

C

S

COMPRESSOR

TERMINAL

ORIENTATION

MAY VARY.

REFER TO

MARKINGS ON

COMPRESSOR

OVERLOAD

PROTECTOR

COMPRESSOR

WIRE HARNESS

ELECTRONIC CONTROL

TRANSFORMER

RELAY

RELAY

COM

NO

RELAY

BLACK

BLUE

RED

WIRING DIAGRAM

SUPPLY CORD

RED

CAPACITOR

FAN c

BLUE

TO CAPACITOR

BRACKET

HERM

BLACK

WHITE

WHITE

BROWN

GREEN OR

GREEN/YELLOW

TO INNERWALL/

MOTOR MOUNT

FAN

MOTOR

TO CHASSIS

SCHEMATIC

L1

RED

BLUE

BLACK

MOTOR WIRE

HARNESS

1

2

3

HIGH

MEDIUM

LOW

OVLD

TO CAPACITOR

BRACKET

R

MTR

S

FAN

CAP

C

NEUTRAL

(115 V)

OVLD

COM

5

ELECTRONIC CONTROL

NO

SWITCH LOGIC

SWITCH POSITION

OFF

HI COOL

MED COOL

LOW COOL

X = CLOSED

O = OPEN

CIRCUIT

X

O

1

O

O

O

X

2

O

O

3 4

O O

O O

O O

X O

X

X

5

O

X

R

L E G E N D

CAP

COMPR

MTR

OVLD

- CAPACITOR

- COMPRESSOR

- FAN MOTOR

- OVERLOAD PROTECTOR

S

COMPR

C

HERM

CAP

C

- COMBINATION TERMINAL

- GROUND LEAD

PART NO.

619-142-14

REV.

03

BLACK

RED

BLUE

(HARNESS, COMPR. MOLDED)

RIBBED (OR BLUE) CONDUCTOR

C

SOLENOID

COMPRESSOR

BLUE

DEFROST CONTROL

2

1

BLACK

BLACK

2

1

3

WHITE

THERMOSTAT

GREEN

TO GND

SCREW

SMOOTH (OR BROWN) CONDUCTOR

BLUE

SUPPLY CORD

MODEL

YQ06J10B-A

RED

BLACK

BLUE

WHITE

RED

PTCR

(OPTIONAL)

WIRING DIAGRAM

BLACK

CAPACITOR

RED

C

HERM

WHITE

BROWN

RED

BLACK

FAN MOTOR

RED

BLACK

4

1 2 3

SYSTEM SWITCH

C

SCHEMATIC

LINE

3

3

THERMOSTAT

1

COMPRESSOR

S

C

H

PTCR (OPTIONAL)

1

C F

RUN CAPACITOR

C' OVLD.

2 SOLENOID

4

SWITCH LOGIC

SWITCH POSITION

OFF

HI-FAN

HI-COOL

LO-COOL

LO-HEAT

HI-HEAT

X = CLOSED

O = OPEN

CIRCUIT

X

X

1

O

O

2

O

O

3

O O

O O O O

X

O

X

X X

X

O

O O

4 5

O

O O

O O

X O

X O

L E G E N D

CAP

COMPR

MTR

OVLD

SYS SW

IDT

PTCR

- CAPACITOR

- COMPRESSOR

- FAN MOTOR

- OVERLOAD PROTECTOR

- SYSTEM SWITCH

- INDOOR THERMOSTAT

- START ASSIST DEVICE

1

2

LOW

HIGH

FAN OVERLOAD

2

FAN MOTOR

DEFROST CONTROL T/STAT.

1

LINE

- OPTIONAL FACTORY WIRING

- GROUND LEAD

- COMBINATION TERMINAL

- PLASTIC INSULATOR

PART NO.

617-581-11

REV.

00

51

52

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

COMPRESSOR

S

C

R

COMPRESSOR

TERMINAL

ORIENTATION

MAY VARY.

REFER TO

MARKINGS ON

COMPRESSOR

OVERLOAD

PROTECTOR

COMPRESSOR

WIRE HARNESS

RED

CAPACITOR

N

BLUE

TO CAPACITOR

BRACKET c

H

E

R

M

S

C

R

TRANSFORMER

WHITE

RED

BLACK

ALTERNATE

COMPRESSOR

WHITE

WHITE

BROWN

ROOM

SENSOR

DEFROST

SENSOR

COM

NO

RELAY

RELAY

RELAY

RELAY

ELECTRONIC CONTROL

BLACK

BLUE

ORANGE

RED

RED

ORANGE

BLUE

BLACK

WIRING DIAGRAM

SUPPLY CORD

TO CAPACITOR

BRACKET

GREEN OR

GREEN/YELLOW

TO INNERWALL/

MOTOR MOUNT

FAN

MOTOR

TO CHASSIS

SCHEMATIC

L1

F4

F3

F2

F1

L1

COM

5

ELECTRONIC CONTROL

NO

HIGH

MEDIUM

LOW

SLEEP

OVLD

OVLD

C

SWITCH LOGIC

SWITCH POSITION

OFF

HI COOL

MED COOL

LOW COOL

SLEEP

X = CLOSED

O = OPEN

CIRCUIT

1 2

O

X

O

O

O

O

X

O

O O

3

O

O

O

X

O

O

O

X

O

O

4 5

O

X

X

X

X

L E G E N D

CAP

COMPR

MTR

OVLD

- CAPACITOR

- COMPRESSOR

- FAN MOTOR

- OVERLOAD PROTECTOR

R

MTR

S

FAN

CAP

C

R

COMPR

S

HERM

CAP

C

NEUTRAL

L2

(115 V)

(230/208)

- COMBINATION TERMINAL

- GROUND LEAD

PART NO.

619-405-06

REV.

01

53

54

MODELS

SL28J30B-A, SL35J30-A, SL35J30-B

COMPRESSOR

"F"

S

C

R

"F"

S

C

R

COMPRESSOR TERMINAL

ORIENTATION MAY VARY. REFER

TO MARKING ON COMPRESSOR.

"F"

RED

BLACK

ALTERNATE

COMPRESSOR

OVERLOAD

PROTECTOR

HARNESS,

COMPRESSOR

MOLDED

ANTICIPATOR

RESISTOR

BLACK OR WHITE

BLACK

ROCKER SWITCH (GE)

WIRING DIAGRAM

RED

PURPLE

SYSTEM SWITCH

BLUE

L M

MS

C

2

L1 H

BLUE

BROWN

BLUE

RED

FAN

CAPACITOR c

WHITE

BROWN

THERMOSTAT

ORANGE

BLUE

BLACK

SUPPLY CORD

HERM

TO CAPACITOR

BRACKET

TO CHASSIS

GREEN OR

GREEN/YELLOW

TO INNERWALL/

MOTOR MOUNT

FAN

MOTOR

BLUE

TO CAPACITOR

BRACKET

SCHEMATIC

L1

L2

AR

L1

1

C

2

IDT

1

OVLD

C

R

COMPR

S

HERM

CAP

C

2

2

H

HIGH MS

1

NO

2

3

YES

MS

3

SYS SW

4

5

M

L

MEDIUM

LOW

OVLD

R

MTR

S

FAN

CAP

C

SWITCH LOGIC

SWITCH POSITION

OFF

LOW COOL

MED COOL

HI COOL

FAN ONLY

X = CLOSED

0 = OPEN

CIRCUIT

1 2

O O

X O

X O

X O

O X

O

X

O

3

O

O

X

O

O

4 5

O

O

O

X

O

O

O

AR

MS

CAP

COMPR

MTR

OVLD

SYS SW

IDT

L E G E N D

- ANTICIPATOR RESISTOR

- MONEY SAVER/ROCKER SWITCH

- CAPACITOR

- COMPRESSOR

- FAN MOTOR

- OVERLOAD PROTECTOR

- SYSTEM SWITCH

- INDOOR THERMOSTAT

- GROUND LEAD

- COMBINATION TERMINAL

- PLASTIC INSULATOR

PART NO.

619-405-01

REV.

00

MODELS

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

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

COMPRESSOR

"F"

S

C

R

"F"

S

C

R

COMPRESSOR TERMINAL

ORIENTATION MAY VARY. REFER

TO MARKING ON COMPRESSOR.

"F"

RED

BLACK

ALTERNATE

COMPRESSOR

OVERLOAD

PROTECTOR

HARNESS,

COMPRESSOR

MOLDED

ANTICIPATOR

RESISTOR

BLACK OR WHITE

BLACK

ROCKER SWITCH (GE)

WIRING DIAGRAM

RED

PURPLE

SYSTEM SWITCH

BLUE

L M

MS

C

2

L1 H

BLUE

BROWN

BLUE

RED

FAN

CAPACITOR c

WHITE

BROWN

THERMOSTAT

ORANGE

BLUE

BLACK

SUPPLY CORD

HERM

TO CAPACITOR

BRACKET

TO CHASSIS

GREEN OR

GREEN/YELLOW

TO INNERWALL/

MOTOR MOUNT

FAN

MOTOR

BLUE

TO CAPACITOR

BRACKET

SCHEMATIC

L1

L2

AR

L1

1

C

2

IDT

1

OVLD

C

R

COMPR

S

HERM

CAP

C

2

2

H

HIGH MS

1

NO

2

3

YES

MS

3

SYS SW

4

5

M

L

MEDIUM

LOW

OVLD

R

MTR

S

FAN

CAP

C

SWITCH LOGIC

SWITCH POSITION

OFF

LOW COOL

MED COOL

HI COOL

FAN ONLY

X = CLOSED

0 = OPEN

CIRCUIT

1 2

O O

X O

X O

X O

O X

O

O

3

O

X

O

O

X

O

O

4 5

O O

O

O

X

O

AR

MS

CAP

COMPR

MTR

OVLD

SYS SW

IDT

L E G E N D

- ANTICIPATOR RESISTOR

- MONEY SAVER/ROCKER SWITCH

- CAPACITOR

- COMPRESSOR

- FAN MOTOR

- OVERLOAD PROTECTOR

- SYSTEM SWITCH

- INDOOR THERMOSTAT

- GROUND LEAD

- COMBINATION TERMINAL

- PLASTIC INSULATOR

PART NO.

619-405-01

REV.

00

55

56

MODELS

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

RED

BLUE

YELLOW

WIRING DIAGRAM

S

C

R

RED

COMPRESSOR

TERMINAL

ORIENTATION

MAY VARY.

REFER TO

MARKINGS ON

COMPRESSOR

2

C2

L

4

L1

MS

3

5

1

SYSTEM SWITCH

BLUE

ALTERNATE

COMPRESSOR

WIRE HARNESS

BLUE

RED

BLACK

COMPRESSOR

S

R

THERMOSTAT

1

3

2

M H AR

C

GRAY

OVERLOAD

PROTECTOR

WHITE

BLACK

BLUE

ORANGE

BROWN

SUPPLY

CORD

TO CAPACITOR

BRACKET

SCHEMATIC

L1

PURPLE

ANTICIPATOR

RESISTOR

BLUE

BLACK OR WHITE

RIBBED CONDUCTOR

OR BLUE

GREEN

TO CAPACITOR

BRACKET

TO CHASSIS

ROCKER SWITCH

(GE) c

FAN

RED

RED

BLUE

HERM

CAPACITOR

BROWN

L1

1

M

MS

1

NO

2

3 YES

IDT

2

3

MS

3

4

5

2

3 H

L

C

1

1

6

7

2

C2

AR

8

9

4

AR

10

SYS SW

5

SWITCH LOGIC

SWITCH POSITION

OFF

LOW COOL

MEDIUM COOL

HIGH COOL

HIGH HEAT

MEDIUM HEAT

LOW HEAT

FAN ONLY

X = CLOSED

0 = OPEN

CIRCUIT

1 2 3 4 5 6 7 8 9 10

O O O O O O O O O O

O O O X X O X O X O

O X O O X O X O X O

O O X O X O X O X O

O O X O O X O X O X

O X O O O X O X O X

O O O X O X O X O X

X O O O O O O O O O

MEDIUM

HIGH

OVLD

LOW

AR

MS

CAP

COMPR

MTR

OVLD

SYS SW

IDT

L E G E N D

- ANTICIPATOR RESISTOR

- MONEY SAVER/ROCKER SWITCH

- CAPACITOR

- COMPRESSOR

- FAN MOTOR

- OVERLOAD PROTECTOR

- SYSTEM SWITCH

- INDOOR THERMOSTAT

ORANGE

RED

R

S

MTR

OVLD

HL

C

HTR

R

COMPR

S

HERM

CAP

C

TF

HTR

HL

TF

HEATER

FAN

CAP

C

- HEATER

- HEATER LIMIT

- THERMAL FUSE

- GROUND LEAD

- COMBINATION TERMINAL

- PLASTIC INSULATOR

PART NO.

619-405-02

FAN

MOTOR

L2

REV.

00

MODELS

YS12J33-A, YM18J34B-A, YL24J35C-A

RED

BLUE

WIRING DIAGRAM

2

C2

L

4

L1

M

MS

H

3

5

1

SYSTEM SWITCH

BLUE

AR

C

BLUE

REVERSING

VALVE ASY

S

C

R

RED

COMPRESSOR

TERMINAL

ORIENTATION

MAY VARY.

REFER TO

MARKINGS ON

COMPRESSOR

THERMOSTAT

1

3

2

YELLOW

GRAY

ALTERNATE

COMPRESSOR

WIRE HARNESS

BLUE

RED

BLACK

COMPRESSOR

S

R

YELLOW

DEFROST

THERMOSTAT

BLACK

3

ORANGE

1

2

BLACK

PURPLE

BLUE

BLACK OR WHITE

ANTICIPATOR

RESISTOR

SUPPLY

CORD

RIBBED CONDUCTOR OR BLUE

GREEN

TO CAPACITOR

BRACKET

TO CHASSIS

TO CAPACITOR

BRACKET

SCHEMATIC

L1

L1

MS

3

YES

2

MS

1

2

3

1 NO

ROCKER SWITCH

(GE)

FAN c RED

RED

BLUE

H

ER

M

CAPACITOR

BROWN

M

H

4

L

3

IDT

2

3 5

ODT

2

3

C

1 6

1

1

7 2

C2

RV

8

9

4

SWITCH LOGIC

SWITCH POSITION

OFF

LOW COOL

MEDIUM COOL

HIGH COOL

HIGH HEAT

MEDIUM HEAT

LOW HEAT

FAN ONLY

AR

SYSTEM SWITCH

X = CLOSED

0 = OPEN

CIRCUIT

1 2 3 4 5 6 7 8 9 10

O O O O O O O O O O

O O O X X O X O X O

O X O O X O X O X O

O O X O X O X O X O

O O X O O X O X O X

O X O O O X O X O X

O O O X O X O X O X

X O O O O O O O O O

10 5

MEDIUM

HIGH

OVLD

LOW

OVLD

C

AR

MS

CAP

COMPR

MTR

OVLD

RV

IDT

ODT

L E G E N D

- ANTICIPATOR RESISTOR

- MONEY SAVER

- CAPACITOR

- COMPRESSOR

- FAN MOTOR

- OVERLOAD

- REVERSING VALVE

- INDOOR THERMOSTAT

- OUTDOOR THERMOSTAT

HL

ORANGE

RED

HTR

HL

TF

WHITE

BLACK

BLUE

ORANGE

BROWN

OVERLOAD

PROTECTOR

HEATER

HTR

R

MTR

S

R

COMPR

S

FAN

CAP

C

HERM C

CAP

TF

- HEATER

- HEATER LIMIT

- THERMAL FUSE

- GROUND LEAD

- COMBINATION TERMINAL

- PLASTIC INSULATOR

PART NO.

619-405-04

FAN

MOTOR

L2

REV.

01

57

58

MODEL

YS09J10B-A

RED

BLUE

WIRING DIAGRAM

THERMOSTAT

1

3

2

YELLOW

2

C2

L

4

L1

MS

M H

3

5

1

SYSTEM

SWITCH

BLUE

CAR

GRAY

BLACK

DEFROST

THERMOSTAT

YELLOW

SUPPLY

CORD

1

3

2

PINK

PURPLE

BLACK OR WHITE

BLUE

ANTICIPATOR

RESISTOR

RED

RIBBED CONDUCTOR OR BLUE

GREEN

TO CAPACITOR

BRACKET

TO CAPACITOR

BRACKET

TO CHASSIS

ROCKER SWITCH

(GE) c

RED

FAN

BLUE

H

ER

M

CAPACITOR

BROWN

SCHEMATIC

L1

L1

1

M

MS

1

NO

2

MS

2

3

H

3

YES

4

L

IDT

2

3

3 5

C

6

1

1

7

2

C2

RV

8

9

4

SWITCH LOGIC

SWITCH POSITION

OFF

LOW COOL

MEDIUM COOL

HIGH COOL

HIGH HEAT

MEDIUM HEAT

LOW HEAT

FAN ONLY

AR

SYSTEM SWITCH

X = CLOSED

0 = OPEN

CIRCUIT

1 2 3 4 5 6 7 8 9 10

O O O O O O O O O O

O O O X X O X O X O

O X O O X O X O X O

O O X O X O X O X O

O O X O O X O X O X

O X O O O X O X O X

O O O X O X O X O X

X O O O O O O O O O

10 5

MEDIUM

HIGH

OVLD

LOW

OVLD

AR

MS

CAP

COMPR

MTR

OVLD

RV

IDT

ODT

L E G E N D

- ANTICIPATOR RESISTOR

- MONEY SAVER

- CAPACITOR

- COMPRESSOR

- FAN MOTOR

- OVERLOAD PROTECTOR

- REVERSING VALVE

- INDOOR THERMOSTAT

- OUTDOOR THERMOSTAT

S

C

R

RED

COMPRESSOR

TERMINAL

ORIENTATION

MAY VARY.

REFER TO

MARKINGS ON

COMPRESSOR

REVERSING

VALVE

WHITE

BLACK

BLUE

ORANGE

BROWN

ALTERNATE

COMPRESSOR

WIRE HARNESS

BLUE

RED

BLACK

COMPRESSOR

S

R

OVERLOAD

PROTECTOR

FAN

MOTOR

C

R

MTR

S

R

COMPR

S

ODT

2

3

1

FAN

CAP

C

HERM C

- GROUND LEAD

- COMBINATION TERMINAL

- PLASTIC INSULATOR

PART NO.

619-142-17

L2

REV.

01

MODELS

EQ08J11-A, EQ08J11-B

WIRING DIAGRAM

COMPRESSOR

"F"

"F"

C

S

R

"F"

HARNESS, COMPR.

R

C

S

NOTE:

OPTIONAL

CONFIGURATION

THERMOSTAT

RIBBED CONDUCTOR

RED

BLUE

BLACK

CAPACITOR

C

FAN HERM

WHITE

BROWN

RED

FAN

MOTOR

BLACK

BLUE

YELLOW

RED

L H

MS

L2

L1

C 2

BLUE

SWITCH

SYSTEM

RED

ORANGE

SUPPLY CORD

TO CAPACITOR

BRACKET

HEATER

SCHEMATIC

L1

IDT

1

3

2

L1

L2

MS

1

2

3

C

2

H

SYS SW

4

L

OVLD

C

R

COMPR

S

HERM

CAP

C

HL

OVLD

HTR

TF

R

MTR

S

FAN

CAP

C

L2

SWITCH LOGIC

SWITCH POSITION

OFF

FAN

HI COOL

LOW COOL

LOW HEAT

HI HEAT

X = CLOSED

0 = OPEN

CIRCUIT

3

4

5

6

1

2

1 2

O O

O O

X O

X O

3

O

O X O

O X X

X

X

O

4

O

O

O

X

X

O

HL

CAP

COMPR

MTR

OVLD

SYS SW

IDT

HTR

- HEATER LIMIT

- CAPACITOR

- COMPRESSOR

- FAN MOTOR

- OVERLOAD PROTECTOR

- SYSTEM SWITCH

- INDOOR THERMOSTAT

- HEATER

L E G E N D

TF - THERMAL FUSE

- PRE-INSULATED CONDUCTOR

- GROUND LEAD

- COMBINATION TERMINAL

- PLASTIC INSULATOR

PART NO.

617-581-12

REV.

01

59

60

COMPRESSOR

S

C

R

MODELS

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

WS09A30E-B, WS12A30E-A, WS15A30-A

OVERLOAD

PROTECTOR

WIRING DIAGRAM

BLUE

SYSTEM SWITCH

L M

MS

C

2

L1 H

PURPLE

COMPRESSOR

WIRE HARNESS

SCHEMATIC

L1

RED

BLUE

CAPACITOR c

FA

HERM

L1

MS

BLACK

WHITE (OR YELL0W)

BROWN

THERMOSTAT

BLACK

PURPLE

RED

SUPPLY CORD

TO GROUNDING

SCREW

3

SYS SW

4

5

1

2

FAN

MOTOR

C

2

IDT

1

OVLD

C

NEUTRAL

L2

(115 V)

(208/230 V)

R

COMPR

S

HERM

CAP

C

M

L

2

H

HIGH

MEDIUM

LOW

OVLD

R

S

MTR

FAN

CAP

C

SWITCH LOGIC

SWITCH POSITION

OFF

LOW COOL

MED COOL

HI COOL

FAN ONLY

X = CLOSED

0 = OPEN

CIRCUIT

1 2 3

O O O

X O O

X O O

X O

O X

X

O

X

O

5

O

O

O

O

X

4

O

O

O

L E G E N D

CAP

COMPR

MTR

OVLD

SYS SW

IDT

- CAPACITOR

- COMPRESSOR

- FAN MOTOR

- OVERLOAD PROTECTOR

- SYSTEM SWITCH

- INDOOR THERMOSTAT

- GROUND LEAD

- COMBINATION TERMINAL

- PLASTIC INSULATOR

PART NO.

617-581-14

REV.

00

MODELS

WE09A33E-B, WE12A33E-A, WE15A33-A

WHITE

PURPLE

PINK BLUE

WIRING DIAGRAM

COMPRESSOR

S

C

R

2

C2

L

4

L1

M

MS

H AR

5

3

1

C

SYSTEM SWITCH

COMPRESSOR

WIRE HARNESS

OVERLOAD

PROTECTOR

THERMOSTAT

1

3

2

RED

BROWN

YELLOW

BLACK

PURPLE

RED

YELLOW

BROWN

FAN

MOTOR

SUPPLY

CORD

SMOOTH CONDUCTOR

RIBBED CONDUCTOR

RED

CAPACITOR

FAN c

HERM

BLUE

ORANGE

YELLOW

L1

L1

MS

C

C2

AR

SWITCH LOGIC

SWITCH POSITION

OFF

LOW COOL

MEDIUM COOL

HIGH COOL

HIGH HEAT

MEDIUM HEAT

LOW HEAT

FAN ONLY

X = CLOSED

0 = OPEN

CIRCUIT

1 2 3 4 5 6 7 8 9 10

O O O O O O O O O O

O O O X X O X O X O

O X O O X O X O X O

O O X O X O X O X O

O O X O O X O X O X

O X O O O X O X O X

O O O X O X O X O X

X O O O O O O O O O

SYS SW

7

8

9

1

2

M

6

5

4

3

H

L

3

1

2

4

10 5

3

1

2

MEDIUM

HIGH

OVLD

LOW

AR

MS

CAP

COMPR

MTR

OVLD

SYS SW

IDT

L E G E N D

- ANTICIPATOR RESISTOR

- MONEY SAVER/ROCKER SWITCH

- CAPACITOR

- COMPRESSOR

- FAN MOTOR

- OVERLOAD PROTECTOR

- SYSTEM SWITCH

- INDOOR THERMOSTAT

SCHEMATIC

HTR

HL

TF

R

MTR

S

HEATER

FAN

CAP

C

OVLD

C

HL

HTR

R

COMPR

S

HERM

CAP

C

TF

- HEATER

- HEATER LIMIT

- THERMAL FUSE

- GROUND LEAD

- COMBINATION TERMINAL

- PLASTIC INSULATOR

PART NO.

617-581-15

L2

REV.

00

61

62

MODELS

WY09A33F-A, WY12A33G-A

THERMOSTAT

1

3

2

BLACK

WHITE

BLUE

BLUE

BROWN

YELLOW

BLUE

BLACK

WIRING DIAGRAM

2

C2

L

4

L1

M

MS

H

BLACK

3

5

1

SYSTEM SWITCH

REV VALVE

BLUE

BLACK

AR

C

BLACK

BLACK

BLUE

COMPRESSOR

FAN MOTOR

BLACK

PURPLE

RED

YELLOW

BROWN

HARNESS, COMPRESSOR

MOLDED

BLUE

S

C

R

DEFROST

T/STAT

OVERLOAD,

PROTECTOR

HEATER

ORANGE ORANGE

YELLOW

L1

SUPPLY CORD

SMOOTH CONDUCTOR

RIBBED CONDUCTOR

TO GROUNDING

SCREW

RV

L1

MS

C

C2

AR

1

2

3

4

5

6

7

8

9

4

2

1

L

3

M

H

10

5 c

CAPACITOR

HERM

RED

YELLOW

BLUE

3

1

IDT

2

SWITCH LOGIC

SWITCH POSITION

OFF

LOW COOL

MEDIUM COOL

HIGH COOL

HIGH HEAT

MEDIUM HEAT

LOW HEAT

FAN ONLY

X = CLOSED

0 = OPEN

CIRCUIT

1 2 3 4 5 6 7 8 9 10

O O O O O O O O O O

O O O X X O X O X O

O X O O X O X O X O

O O X O X O X O X O

O O X O O X O X O X

O X O O O X O X O X

O O O X O X O X O X

X O O O O O O O O O

L E G E N D

MS

CAP

COMPR

MTR

OVLD

RV

IDT

ODT

- MONEY SAVER

- CAPACITOR

- COMPRESSOR

- FAN MOTOR

- OVERLOAD PROTECTOR

- REVERSING VALVE

- INDOOR THERMOSTAT

- OUTDOOR THERMOSTAT

3

2

1

MEDIUM

HIGH

OVLD

SCHEMATIC

R

MTR

LOW

OVLD

C

S

FAN

CAP

C

R

S

COMPR

HERM C

CAP

L2

ODT

HL

TF

HTR

HTR

HL

TF

- HEATER

- HEATER LIMIT

- THERMAL FUSE

- GROUND LEAD

- COMBINATION TERMINAL

- PLASTIC INSULATOR

PART NO.

617-581-02

REV.

03

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.

63

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.

RACServMn (7-03)