Friedrich racservmn User Manual

Service Manual  
2003  
Room Air Conditioners  
RACServMn (7-03)  
UNIT IDENTIFICATION  
Model Number Code  
S S 08 J 1 0 R  
1st Digit – Function  
8th Digit – Engineering  
S = Straight Cool, Value Series  
C = Straight Cool, Budget  
Series  
Major change  
7th Digit – Options  
Y = Heat Pump  
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  
E = Electric Heat  
K = Straight Cool, Challenger  
Series  
W = Thru-the Wall,  
WallMaster Series  
6th Digit – Voltage  
2nd Digit  
1 = 115 Volts  
C = Casement  
P = PowerMiser "Portable"  
Q = Q-Star  
2 = 230 Volts  
3 = 230-208 Volts  
M = Medium Chassis  
L = Large Chassis  
W = Built -In  
5th Digit  
Alphabetical Modifier  
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
C
G
S
00001  
L=0  
A=1  
B=2  
C=3  
D=4  
E=5  
F=6  
G=7  
H=8  
J=9  
Production Run Number  
Year Manufactured  
PRODUCT LINE  
S=RAC  
A=1  
B=2  
C=3  
D=4  
E=5  
F=6  
G=7  
H=8  
J=9  
K=0  
P=PTAC  
E=EAC  
V=VPAK  
H=Split  
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  
3
4
EQ PERFORMANCE DATA  
OPERATING  
PERFORMANCE  
DATA*  
EVAPORATOR AIR  
TEMP. DEG. F.  
ELECTRICAL  
RATINGS  
R-22  
REFRIG. FUSE  
BREAKER  
PRESSURES  
Cooling  
Discharge Temp.  
Suction  
Discharge Amps  
Locked  
Charge in 60 Hertz  
Air  
Drop F.  
29.5  
Rotar Amp OZ.  
Amps  
15  
EQ08J11-A  
EQ08J11-B  
50.5  
50.5  
72  
74  
262  
259  
7.5  
7.5  
39.2  
39.2  
20  
20  
29.5  
15  
XQ PERFORMANCE DATA  
OPERATING  
DATA*  
Cooling  
EVAPORATOR AIR  
TEMP. DEG. F.  
ELECTRICAL  
RATINGS  
Locked  
R-22  
REFRIG. FUSE  
BREAKER  
PRESSURES  
Discharge Temp.  
Suction  
Discharge Amps  
Charge in 60 Hertz  
Air  
Drop F.  
24.55  
28.55  
28.55  
27.95  
29.5  
Rotar Amp OZ.  
Amps  
15  
XQ05J10B  
XQ06J10-A  
XQ06J10-B  
XQ07J10-1  
XQ08J10-1  
XQ08J10-A  
55.45  
51.45  
51.45  
52.22  
50.5  
79  
82  
79  
77  
72  
72  
245  
262  
254  
250  
262  
262  
4.6  
34  
35  
35  
37  
38  
38  
20  
21  
21  
24  
20  
21  
5.1  
5.1  
6.5  
4.5  
4.5  
15  
15  
15  
15  
15  
50.5  
29.5  
SQ PERFORMANCE DATA  
PERFORMANCE EVAPORATOR AIR  
OPERATING  
PRESSURES  
ELECTRICAL  
RATINGS  
R-22  
REFRIG. FUSE  
BREAKER  
DATA*  
TEMP. DEG. F.  
Cooling  
Discharge Temp.  
Suction  
Discharge Amps  
Locked  
Charge in 60 Hertz  
Air  
Drop F.  
24.55  
28.55  
28.55  
29.5  
Rotar Amp OZ.  
Amps  
15  
SQ05J10B-B  
SQ06J10B-A  
SQ06J10B-B  
SQ08J10C-1  
55.45  
51.45  
51.45  
50.5  
79  
245 4.4  
34.'0  
35.'0  
35.'0  
39.2  
16.'0  
82  
79  
72  
262  
254  
262  
5.2  
5.2  
7.5  
15.7  
15.7  
19.5  
15  
15  
15  
KQ-YQ PERFORMANCE DATA  
PERFORMANCE  
DATA*  
EVAPORATOR AIR  
TEMP. DEG. F.  
OPERATING  
PRESSURES  
ELECTRICAL  
RATINGS  
R-22  
REFRIG. FUSE  
BREAKER  
Cooling  
Discharge Temp.  
Suction  
Discharge Amps  
Locked  
Charge in 60 Hertz  
Air  
Drop F.  
28.66  
28.66  
28.66  
21.98  
21.98  
21.98  
21.98  
25.9  
Rotar Amp OZ.  
Amps  
15  
KQ05J10B-B  
KQ05E10-B  
KQ05E10-C  
KQ06J10B-A  
KQ06J10B-B  
KQ06E10-A  
KQ06E10-B  
YQ06J10B-A  
56.34  
56.34  
56.34  
58.02  
58.02  
58.02  
58.02  
54.1  
73  
251  
245  
245  
262  
269  
262  
254  
267  
5.2  
5.2  
5.2  
5.8  
5.8  
5.8  
5.8  
5.7  
29.'0  
29.'0  
29.'0  
35.'0  
35.'0  
35.'0  
35.'0  
39.2  
15.'0  
79  
79  
82  
80  
82  
79  
81  
15.'0  
15.'0  
15.'0  
19.'0  
15.'0  
15.'0  
19.'0  
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
RS-RM PERFORMANCE DATA  
PERFORMANCE EVAPORATOR AIR  
OPERATING  
PRESSURES  
ELECTRICAL  
RATINGS  
R-22  
REFRIG.  
BREAKER  
FUSE  
DATA*  
TEMP. DEG. F.  
Cooling  
Discharge Temp.  
Suction Discharge Amps  
Locked Charge in 60 Hertz  
Air  
61  
57  
57  
56.5  
56  
Drop F.  
19  
Rotar Amp  
OZ.  
26  
30  
29.5  
30  
48  
Amps  
15  
15  
15  
15  
RS10J10-C  
RS12J10A-B  
RS15J10-A  
RS16J30A-A  
RS18J30-A  
RM24J30-A  
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  
23  
23  
24  
24  
15  
15  
57  
23.65  
54  
YS-YM-YL PERFORMANCE DATA  
PERFORMANCE EVAPORATOR AIR  
OPERATING  
PRESSURES  
ELECTRICAL  
RATINGS  
R-22  
REFRIG.  
BREAKER  
FUSE  
DATA*  
TEMP. DEG. F.  
Cooling  
Discharge Temp.  
Suction Discharge Amps  
Locked Charge in 60 Hertz  
Air  
59  
56  
53  
55  
Drop F.  
21  
Rotar Amp  
OZ.  
25  
28  
54  
74  
Amps  
15  
20  
30  
30  
YS09J10B-A  
YS12J33-A  
YM18J34B-A  
YL24J35C-A  
90  
80  
74  
72  
243  
264  
284  
260  
7.7  
39.2  
30  
42  
24  
27  
25  
5.2/5.6  
8.7/9.2  
10.0/12.0  
61  
* Rating Conditions: 80 degree F. Room Air Temperature and 50% Relative Humidity with  
95 degree F. Outside Air Temperature at 40% Relative Humidity.  
6
PERFORMANCE EVAPORATOR AIR  
OPERATING  
PRESSURES  
ELECTRICAL  
RATINGS  
R-22  
REFRIG.  
BREAKER  
FUSE  
DATA*  
TEMP. DEG. F.  
Cooling  
Discharge Temp.  
Suction Discharge Amps  
Locked Charge in 60 Hertz  
Air  
58  
53  
55  
55  
52  
52  
Drop F.  
22  
Rotar Amp  
26.3  
OZ.  
28  
30  
40.5  
48.5  
60  
Amps  
20  
20  
30  
30  
ES12J33B-A  
ES16J33A-A  
EM18J34B-A  
EL25J35-A  
EL35J35-A  
EL35J35-B  
82  
77  
71  
75  
72  
72  
265  
269  
267  
284  
317  
317  
5.76.6  
7.5/8.0  
8.6/9.2  
11.5/12.6  
18/20  
27  
25  
25  
28  
42.'0  
42.'0  
61.'0  
94.'0  
30  
30  
28  
18/20  
94.'0  
60  
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  
KS-KM PERFORMANCE DATA  
DATA*  
Cooling  
EVAPORATOR AIR  
TEMP. DEG. F.  
OPERATING  
PRESSURES  
ELECTRICAL  
RATINGS  
R-22  
REFRIG.  
BREAKER  
FUSE  
Discharge Temp  
Amps  
Locked Charge in 60 Herts  
Air  
61  
61  
57  
57  
55.78  
57  
56  
55  
55  
Drop F.  
19  
Rotar Amp  
48.3  
OZ.  
26.08  
26.88  
28  
Amps  
15  
15  
15  
15  
15  
15  
15  
15  
KS10E10-A  
KS10J10-B  
KS12E10-A  
KS12J10B-A  
KS15J10-A  
KS12J30B-A  
KS18J30-A  
KM20J30-A  
KM24J30-A  
82  
80  
83  
84  
77  
76  
72  
70  
68  
248  
263  
271  
268  
279  
285  
293  
279  
301  
9.1  
9.1  
10.8  
10.8  
12.'0  
6.2  
8.7  
9.9  
15.'0  
19  
23  
23  
23.52  
23  
24  
24  
25  
48.3  
54.'0  
54.'0  
67.'0  
26.'0  
48  
28  
29.5  
30.08  
48  
48  
54.08  
48  
71.'0  
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
SS PERFORMANCE DATA  
PERFORMANCE EVAPORATOR AIR  
OPERATING  
PRESSURES  
ELECTRICAL  
RATINGS  
R-22  
REFRIG.  
BREAKER  
FUSE  
DATA*  
TEMP. DEG. F.  
Cooling  
Discharge Temp.  
Suction Discharge Amps  
Locked Charge in 60 Hertz  
Air  
61.4  
61.4  
57.8  
57.22  
57.2  
57.22  
57.2  
56.9  
56.9  
Drop F.  
18.6  
18.6  
22.2  
22.78  
22.8  
22.9  
22.8  
23  
Rotar Amp  
OZ.  
39.'0  
24.'0  
22.6  
26.'0  
30.'0  
29.5  
27.5  
30.'0  
48  
Amps  
15  
15  
15  
15  
15  
15  
20  
20  
SS08J10R-B  
SS08J10R-A  
SS09J10C-A  
SS10J10AR-A  
SS12J10AR-B  
SS14J10R-A  
SS12J30D-A  
SS16J30A-A  
SS18J30R-A  
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  
29  
36.2  
44  
42  
44  
61  
21  
28  
45  
12  
5.0/5.2  
7.5/8.0  
8.1/8.7  
23  
20  
SM-SL PERFORMANCE DATA  
PERFORMANCE EVAPORATOR AIR  
OPERATING  
PRESSURES  
ELECTRICAL  
RATINGS  
R-22  
REFRIG. FUSE  
BREAKER  
DATA*  
TEMP. DEG. F  
Cooling  
Discharge Temp  
Suction Discharge Amps  
Locked Charge in 60 Hertz  
Air  
Drop F.  
27.42  
25.14  
27.68  
26.9  
Rotar Amp  
OZ.  
47  
54  
48.5  
50  
60  
Amps  
20  
20  
20  
20  
SM20J30-A  
SM24J30-A  
SL25J30-A  
SL28J30B-A  
SL35J30-A  
SL35J30-B  
52.58  
54.86  
52.32  
52.1  
52.93  
52.93  
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  
27.07  
27.07  
30  
30  
60  
* Rating Conditions: 80 degree F. Room Air Temperature and 50% Relative Humidity with  
95 degree F. Outside Air Temperature at 40% Relative Humidity.  
8
WS PERFORMANCE DATA  
PERFORMANCE EVAPORATOR AIR  
OPERATING  
PRESSURES  
ELECTRICAL  
RATINGS  
R-22  
REFRIG.  
BREAKER  
FUSE  
DATA*  
TEMP. DEG. F.  
Cooling  
Discharge Temp.  
Suction Discharge Amps  
Locked Charge in 60 Hertz  
Air  
59.5  
59.5  
59.5  
58  
58  
55  
55  
58  
Drop F.  
19.5  
19.5  
19.5  
22  
22  
25  
25  
22  
32.9  
33  
33  
Rotar Amp  
OZ.  
19  
28  
20  
25  
26  
28.5  
36  
22  
27.5  
42  
Amps  
15  
15  
15  
15  
15  
15  
15  
15  
WS07A10E-B  
WS07A10E-C  
WS07A10E-D  
WS10A10-A  
WS10A10-B  
WS12A10E-B  
WS13A10-A  
WS09A30E-B  
WS12A30E-A  
WS12A30E-B  
WS15A30-A  
84  
85  
85  
83  
83  
81  
79  
86  
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  
32  
32  
32  
48  
48  
54  
55  
44  
54  
54  
42  
4.7  
47.1  
46  
47  
11.9  
11.9  
8.5  
15  
15  
15  
43.5  
WE-WY PERFORMANCE DATA  
DATA*  
EVAPORATOR  
TEMP. DEG. F.  
OPERATION  
ELECTRICAL  
RATINGS  
R-22  
BREAKER  
FUSE  
Cooling  
PRESSURES  
REFRIG.  
Discharge Temp.  
Suction Discharge Amps  
Locked Charge in 60 Hertz  
Air  
58  
55  
47.1  
58  
55  
Drop F.  
22  
25  
32.9  
22  
Rotar Amp  
OZ.  
23  
27.5  
43.5  
24  
Amps  
20  
20  
20  
20  
WE09A33E-C  
WE12A33E-B  
WE15A33-A  
WY09A33F-A  
WY12A33G-A  
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  
25  
37  
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
PERFORMANCE DATA*  
SC06H10E  
SPECIFICATIONS  
BTUH (Cooling)  
E.E.R. (Cooling)  
Volts  
SC06H10E  
5950  
8.0  
DISCHARGE  
56.1  
EVAPORATOR AIR  
TEMP. °F  
AIR  
TEMP  
23.9  
115  
DROP °F  
SUCTION  
DISCHARGE  
AMPS  
Amperes (Cooling)  
Total Watts (Cooling)  
Hertz  
6.8  
OPERATING  
PRESSURES  
72  
293  
6.8  
760  
60  
Fuse/Breaker Size  
Fan RPM  
15  
ELECTRICAL  
RATINGS  
1595  
125  
LOCKED  
ROTOR AMPS  
CHARGE IN  
OUNCES  
35.0  
14  
Evaporator Air CFM  
Dehumidification Pts/Hr  
Width  
2.0  
R-22  
REFRIG.  
COMP.  
OIL  
1411/16"  
1013/16"  
27"  
Height  
CHARGE IN  
FLUID OZ.  
9.8  
Depth  
Minimum Ext. Into Room  
Minimum Ext. To Outside  
Net Weight  
2½"  
15½"  
70  
* Rating Conditions:  
80°F Room Air Temperature and 50% Relative Humidity with  
95°F Outside Air Temperature at 40% Relative Humidity.  
Shipping Weight  
80  
PERFORMANCE DATA  
(Heating)  
*YS09J10B-A **YS12J33-A  
**YM18J34A-A  
**YL24J35C-A  
AHAM  
@ 70°F Inside 47°F Outside  
@ 70°F Inside 35°F Outside  
8300  
12400/12300  
10700/8900  
17200/17200  
13000/10600  
23000/22800  
17300/14300  
Evaporator Air Temperature Rise  
@ 70°F Inside 47°F Outside  
19.62  
6.7  
31.38  
28.69/23.87  
24.74  
24.46/20.22  
31.71  
24.38/20.16  
@ 70°F Inside 35°F Outside  
AMPS  
Watts  
@ 70°F Inside 47°F Outside  
@ 70°F Inside 35°F Outside  
6.0/6.5  
16.0/14.7  
8.5/9.0  
19.5/17.0  
10.4/11.5  
24.0/22.4  
@ 70°F Inside 47°F Outside  
@ 70°F Inside 35°F Outside  
760  
1340/1300  
3500/2900  
1880/1820  
5500/4650  
2350/2340  
5500/4650  
Suction/Head PSIG  
@ 70°F Inside 47°F Outside  
53.5/222  
52.5/251  
53/225  
54/236.5  
* Do not operate below 37° ambient.  
** Heating element comes on at 35°F outside ambient and compressor shuts off.  
10  
PERFORMANCE DATA  
(Heating)  
*WY09A33F-A  
*WY12A33F-A  
BTUH  
@70°F Inside 62°F Outside  
9700  
9300  
12400  
12000  
@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  
8800  
11400  
8200/8100  
7600  
10800/10400  
10000  
6800  
9000  
11000/9100  
11000/9100  
Evaporator Air Temperature Rise  
@70°F Inside 62°F Outside  
32.00  
30.75  
29.10  
27.10/26.80  
25.10  
22.50  
36.40/30.10  
4.0  
37.60  
36.40  
@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  
@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  
34.50  
32.70/31.50  
30.30  
27.30  
33.30/27.60  
5.6  
AMPS  
3.9  
5.5  
3.85  
5.4  
3.8/4.1  
3.6  
5.3/5.6  
5.1  
3.4  
4.8  
16.0/14.7  
880  
16.0/14.7  
1280  
Watts  
870  
1260  
860  
1220  
835/810  
800  
1175/1155  
1130  
760  
1070  
3550/2950  
3550/2950  
Suction/Head PSIG  
@70°F Inside 62°F Outside  
66/315  
62/285  
57/285  
53/265  
49/215  
45/203  
44/200  
61/325  
59/290  
53/275  
49/255  
45/240  
41/220  
40/215  
@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  
*
Heating Element comes on at 35°F outside ambient and compressor shuts off.  
** AHAM Rating Conditions.  
11  
Re frig e ra tion Sys te m  
Se q u e n c e of Op e ra tion  
Agood understanding of the basic operation of the refrigeration In the case of the capillary tube this is accomplished (by design)  
system is essential for the service technician. Without this through size (and length) of device, and the pressure difference  
understanding, accurate troubleshooting of refrigeration present across the device.  
system problems will be more difficult and time consuming, if  
Since the evaporator coil is under a lower pressure (due to the  
not (in some cases) entirely impossible. The refrigeration  
suction created by the compressor) than the liquid line, the liquid  
system uses four basic principles (laws) in its operation they  
refrigerant leaves the metering device entering theevaporatorcoil.  
are as follows:  
As it enters the evaporator coil, the larger area and lower pressure  
1. "Heat always flows from a warmer body to a cooler body." 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  
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 that heat. This results in a lowering of the indoor air temperature,  
pressure area."  
hence the "cooling" effect.  
4. "The temperature at which a liquid or gas changes state The expansion and absorbing of heat cause the liquid refrigerant  
is dependent upon the pressure."  
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 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 The particular system design determines at exactly what point (in  
compressor then "compresses" this refrigerant, raising its the evaporator) the change of state (i.e. liquid to a gas) takes  
pressure and its (heat intensity) Temperature.  
place. In all cases, however, the refrigerant must be totally  
evaporated (changed) to a gas before leaving the evaporator coil.  
The refrigerant leaves the compressor through the discharge  
line as a hot high pressure gas (vapor). The refrigerant enters The low pressure (suction) created by the compressor causes the  
the condenser coil where it gives up some of its heat. The refrigerant to leave the evaporator through the suction line as a  
condenser fan moving air across the coil's finned surface cool low pressure vapor. The refrigerant then returns to the  
facilitates the transfer of heat from the refrigerant to the compressor, where the cycle is repeated.  
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  
Suction  
Line  
Discharge  
Line  
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.  
Evaporator  
Coil  
Condenser  
Coil  
Compressor  
Metering  
Device  
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.  
Refrigerant  
Drier  
Liquid  
Line  
Refrigerant  
Dryer  
Theliquidrefrigerantnextentersthemeteringdevice. Themetering  
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.  
12  
Ele c tric a l Ra tin g Ta b le s  
Circuit Rating  
Breaker or T-D Fuse  
Plug Face  
(NEMA#)  
Appearance  
(Facing Blades)  
Model  
ALL SV and XQ MODELS,  
KS10J10, KS12J10B, KS15J10, RS10J10, RS12J10A,  
RS15J10, SS08J10R, SS09J10C, SS10J10AR,  
SS12J10AR, SS14J10R, SC06H10D,  
EQ08J11, YQ06J10B, YS09J10B  
125V - 15A  
5 - 15P  
KS12J30B, KM18J30C, RS16J30A,  
250V - 15A  
250V - 20A  
6 - 15P  
6 - 20P  
RM18J30A, SS12J30D, SS16J30A, SM18J30BR  
KM20J30, KM24J30, SM20J30,  
SL25J30, SL28J30B*, ES12J33B,  
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.  
WIKQ  
EQ08J11, YQ06J10B  
ES12J33B, ES16J33A,  
YS09J10B, YS12J33  
WIKS  
EM18J34B, YM18J34B  
WIKM  
WIKL  
EL25J35, EL35J35,  
YL24J35C  
Ele c tric s h o c k h a za rd .  
Turn off electric power before service or installation.  
All electrical connections and wiring MUST be installed by a qualified  
electrician and conform to the National Electrical Code and all local  
codes which have jurisdiction.  
Wire Size  
Use ONLY wiring size recommended for  
single outlet branch circuit.  
Failure to do so can result in property damage, personal injury and/  
or death.  
Fuse/Circuit  
Breaker  
Use ONLY type and size fuse or HACR  
circuit breaker indicated on unit's rating  
plate. Proper current protection to the unit  
is the responsibility of the owner.  
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  
Figure 2  
Typical Ground Test  
WARNING  
DISCONNECT ELECTRICAL POWER TO  
UNIT BEFORE SERVICING OR TESTING  
COMPRESSORS  
Compressors are single phase, 115 or 230/208 volt,  
depending on the model unit. All compressor motors are  
permanent split capacitor type using only a running capacitor  
across the start and run terminal.  
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.  
All compressors are internally spring mounted and externally  
mounted on rubber isolators.  
This condition can be checked as follows:  
WINDING TEST  
1. Install a piercing valve on the suction and discharge or  
liquid process tube.  
Remove compressor terminal box cover and disconnect wires  
from terminals. Using an ohmmeter, check continuity across  
the following: (See Figure 1)  
2. Attach gauges to the high and low sides of the system.  
3. Start the system and run a “cooling or heating  
performance test.”  
1. Terminal "C" and "S" - no continuity - open winding -  
replace compressor.  
If test shows:  
2. Terminal "C" and "R" - no continuity - open winding -  
replace compressor.  
A. Below normal high side pressure  
B. Above normal low side pressure  
C. Low temperature difference across coil  
3. Terminal "R" and "S" - no continuity - open winding -  
replace compressor.  
The compressor valves are faulty - replace the  
compressor.  
Figure 1  
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 con-  
nection is a must) and the other probe in turn to each com-  
pressor terminal (see Figure 2.) If a reading is obtained, the  
compressor is grounded and must be replaced.  
14  
Heat generated within the compressor shell is usually due to:  
FAN MOTOR - TEST  
1. Determine that capacitor is serviceable.  
1. High amperage  
2. Disconnect fan motor wires from fan speed switch or  
system switch.  
2. Low refrigerant charge  
3. Frequent recycling  
4. Dirty condenser  
3. Apply "live" test cord probes on black wire and common  
terminal of capacitor. Motor should run at high speed.  
TERMINAL OVERLOAD - TEST  
(Compressor - External Type)  
4. Apply "live" test cord probes on red wire and common  
terminal of capacitor. Motor should run at low speed.  
1. Remove overload.  
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.  
2. Allow time for overload to reset before attempting to  
test.  
3. Apply ohmmeter probes to terminals on overload wires.  
There should be continuity through the overload.  
TERMINAL OVERLOAD (Internal)  
Some model compressors are equipped with an internal  
overload. The overload is embedded in the motor windings  
to sense the winding temperature and/or current draw. The  
overload is connected in series with the common motor  
terminal.  
Figure 5  
Fan Motor  
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 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 com-  
pressor terminals.  
2. Using an ohmmeter, test continuity between terminals  
C-S and C-R. If no continuity, the compressor overload  
is open and the compressor must be replaced.  
FAN MOTOR  
Asingle phase permanent split capacitor motor is used to drive  
the evaporator blower and condenser fan.Aself-resetting over-  
load is located inside the motor to protect against high tem-  
perature 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:  
Rocker Switch  
Figure 8  
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".  
SYSTEM CONTROL PANEL (XQ MODELS ONLY)  
5. "Fan Only" Position - between terminals "L1" and "2".  
(See Figure 9)  
1. Power button turns the unit on and off.  
RESISTOR  
(Heat Anticipator) (SQ Only)  
2. Fan Speed button allows selection between three cool-  
ing speeds and fan 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.  
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).  
Figure 7  
System Switch  
(SQ Only)  
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  
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.  
System Control Panel (XQ Models Only)  
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  
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:  
SYSTEM CONTROL PANEL  
("KQ" Models Only- See Figure 10)  
The KQ Model unit uses a five position control switch to regu-  
late the operation of the unit. Function of each position (clock-  
wise rotation) is as follows:  
1. “Off” Turns everything off.  
Figure 10  
2. “Fan Only” To circulate filtered room air, but no cooling  
or heating  
System Control Panel (KQ Models Only)  
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 12  
1. "Off" - Turns everything off.  
System Control Panel (EQ Models only)  
2. "Hi Fan" - Maximum circulation of filtered room air (no  
cooling.)  
3. "Low Fan" - Fan runs slower for less circulation of fil-  
tered room air.  
4. "Low Cool" - Fan runs slowly for quiet operation when  
maximum cooling is not needed.  
5. "Hi Cool" - Highest fan speed for maximum cooling.  
SYSTEM CONTROLSWITCH - TEST (See Figure 11)Turn knob  
to phase of switch to be tested. There must be continuity as fol-  
lows:  
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".  
Turn knob to phase of switch to be tested. There must be  
continuity as follows:  
1. “Fan Only” Position – between terminals “MS” and “H”  
3. "Low Cool" Position - between terminals "L1" and "L" and  
"C".  
2. “Hi Cool” Position – between terminals “L1” and “C” and  
“MS” and “H”  
4. "Hi Cool" Position - between terminals "L1" and "H" and "C".  
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”  
Figure 11  
System Control Switch  
(KQ Models Only)  
5. “Hi Heat” Position – between terminals “L2” and “2” and  
“MS” and “H”  
17  
4. "Lo Heat" Position - between terminals "C" and "2", and  
"C" and "4".  
L1  
Figure 13  
System Control Switch  
(EQ Models)  
5. "Hi Heat" Position - between terminals "C" and "1", and  
"C" and "4".  
B1  
L2  
MS  
C
H
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:  
2
LO  
SYSTEM CONTROL PANEL ("YQ" Model Only)  
(See Figure 14)  
Figure 15  
System Control Switch  
(YQ Model Only)  
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.  
Figure 16  
5. "Lo Heat" - Fan Runs continuously, heating turns on and  
off to maintain the selected room temperature.  
System Control Panel (SC Model Only)  
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)  
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)  
SYSTEM CONTROL SWITCH - TEST (See Figure 15)  
Turn knob to phase of switch to be tested. There must be  
continuity as follows:  
1. "Off" All contacts open.  
2. "Hi Fan Contacts closed between terminals "L1" and "1".  
1. "Fan Only" Position - between terminals "C" and "1".  
3. "Hi Cool" Contacts closed between terminals "L1" to "1"  
and "L1" and "C".  
2. "Hi Cool" Position - between terminals "C" and "1", "C"  
and "3".  
4. "Lo-Cool" Contacts are closed between terminals "L1"  
to "2" and "L1 to "C".  
3. "Lo Cool" Position - between terminals "C" and "2", and  
"C" and "3".  
18  
Figure 19  
Figure 16  
System Control Switch  
(WS Models)  
System Control Switch  
(SC Model Only)  
SYSTEM CONTROL SWITCH "WE" & "WY" Models  
(See Figure 20)  
1. Disconnect leads from control switch.  
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.  
2. Check continuity between all switch positions shown in  
Figure 17.  
SYSTEM CONTROL PANEL  
"WS" Models (See Figure 18)  
The fan motor can also be operated independently on medium  
speed. See switch section as indicated on decorative control panel.  
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 20  
System Control Panel  
(WE & WY Models)  
Figure 18  
System Control Panel (WS Models)  
SYSTEM CONTROL SWITCH - TEST (See Figure 21)  
Disconnect leads from control switch. Turn control to position  
being tested. There must be continuity as follows:  
1. "Off" Position-no continuity between terminals.  
SYSTEM CONTROL SWITCH - TEST  
Disconnect leads from control switch (See Figure 19)  
There must be continuity as follows:  
2. "Lo Cool" Position-between terminals "C" and "3", "C2"  
and "2", "LO" and "M/S", "AR" and "5".  
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 "C" and "3",  
"C2" and "2", "M" and "M/S", "AR" and "5".  
3. "Med Cool" Position - between terminals "L1" and "C", "M"  
and "MS".  
4. "Hi Cool" Position-between terminals "C" and "3", "C2"  
and "2", "H" and "M/S", "AR" and "5".  
4. "Hi Cool" Position - between terminals "L1" and C", "H"  
and "MS."  
5. "Hi Heat" Position-between terminals "C" and "1", "C2"  
and "4", "H" and "M/S", "AR" and "5".  
5. "Fan Only" Position - between terminals "L1" and "2."  
19  
6. "Med Heat" Position-between terminals "C" and "1", SYSTEM CONTROL SWITCH - TEST (See Figure 23)  
"C2" and "4", "M" and "M/S", "AR" and "5".  
Disconnect leads from control switch. There must be continuity  
as follows:  
7. "Lo Cool" Position-between terminals "C" and "1", "C2"  
and "4", "LO" and "M/S", "AR" and "5".  
1. "Off" Position - no continuity between terminals.  
2. "Lo Cool" Position - between terminals "L1" and "C," "LO"  
and "MS."  
8. "Fan Only" Position-between terminals "L1" and "M".  
3. "Med Cool" Position - between terminals "L1" and "C,"  
"M" and "MS."  
Figure 21  
4. "Hi Cool" Position - between terminals "L1" and "C,"  
"H"and "MS."  
System Control Switch  
Heat Pump / Electric Heat  
(WE & WY Models)  
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.  
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 22  
System Control Panel (KS, SS, KM, SM, SL)  
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:  
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.  
Figure 25  
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.  
SYSTEM CONTROL SWITCH (See Figure 26)  
(Heat Pump & Electric Heat Models)  
6. "Med Heat" Position - fan operates on medium speed,  
compressor or electric heater is on.  
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.  
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.  
1. "Off" Position - everything is off.  
2. "Lo Cool" Position - fan operates on low speed,  
compressor is on.  
Figure 27  
System Control Panel  
Heat Pump & Electric Heat Models  
(YS, ES, YM, EM, YL & EL)  
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.  
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:  
TO ADJUST TEMPERATURE  
COOLER - Touch COOLER to see setting, touch again to  
change.  
WARMER - Touch WARMER to see setting, touch again to  
1. "Off" Position - no continuity between terminals.  
change.  
2. "Lo Cool" Position - between terminals "C" and "3", "C2"  
and "2", "LO" and "M/S", "AR" and "5".  
Touch °F/°C to show desired temperature in Fahrenheit or  
Celsius.  
3. "Med Cool" Position - between terminals "C" and "3", "C2"  
and "2", "M" and "M/S", "AR" and "5".  
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.  
4. "Hi Cool" Position - between terminals "C" and "3", "C2"  
and "2", "H" and "M/S", "AR" and "5".  
TO ACTIVATE SMART FAN  
5. "Hi Heat" Position - between terminals "C" and "1", "C2"  
and "4", "H" and "M/S", "AR" and "5".  
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.  
6. "Med Heat" Position - between terminals "C" and "1", "C2"  
and "4", "M" and "M/S", "AR" and "5".  
7. "Lo Cool" Position - between terminals "C" and "1", "C2"  
and "4", "LO" and "M/S", "AR" and "5".  
8. "Fan Only" Position - between terminals "L1" and "M".  
Figure 28  
System Control Switch  
(Heat Pump / Electric  
Heat Models  
Figure 29  
Electronic Control  
Smart Center Electronic Control Center  
(See Figure 29)  
FILTERALERT 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  
Activating Error Code Mode: (Submode of Test Mode) Unit  
TO SET HOUR CLOCK  
has to be in Test Mode to enter Error Code Mode  
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.)  
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.  
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.  
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.  
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.  
IMPORTANT: Error Codes are cleared from the log  
by exiting from Error Code Mode. To exit on XQ mod-  
els, press Timer On/Off button. To exit QME models,  
press A/C Start and On/Off buttons. Or unplug unit to  
exit Error Code Mode. Plug unit in after 5 seconds to  
resume normal operation of unit.  
TESTING THE ELECTRONIC CONTROL  
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.  
TESTING THE ELECTRONIC CONTROL  
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.  
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.  
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.  
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.  
Activate test mode by pressing at the same time the  
"MONEY SAVER" button and the "FILTERALERT" 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.  
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.  
Test Mode default settings are ON, Money Saver, 60 degrees F,  
and High fan speed  
.
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.  
Figure 31  
Thermostat  
(YQ Models Only)  
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.  
TEST:  
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.  
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.  
THERMOSTAT ("SQ & KQ" Models) - See Figure 30.  
NOTE: The thermostat must be within the temperature  
range listed to open and close.  
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.  
To maintain the comfort level desired, a cross ambient type  
thermostat is used.The thermostat has a range from 65° ±2°F  
to 87° ±3°F. The thermostat bulb is positioned in front of the  
evaporator coil to sense the return air temperature. Thermo-  
stat malfunction or erratic operation is covered in the trouble-  
shooting section of this manual.  
TEST:  
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.  
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.  
Figure 30  
4. Turn thermostat knob counterclockwise to its warmest  
position.  
Thermostat  
5. Test for continuity - contacts should be open.  
NOTE: The thermostat must be within the temperature range  
listed to open and close.  
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.) Acurrent feedback through the fan motor windings  
during "off cycle" completes the circuit to the resistor.  
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.  
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  
RANGE:  
Cooling Model Thermostat  
60°F (±2°) to 92°F (±4°),  
dimension shown  
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.  
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.  
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.  
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.  
Figure 32  
Thermostat  
When the outdoor coil temperature drops below 20°, the unit  
will operate in electric heat mode continuously until the outdoor  
coil temperature rises above 43°.  
The fan motor will not turn off when defrost occurs, and the 4-  
way valve will not reverse.  
Figure 35  
Defrost Thermostat  
(Heat Pump Models)  
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 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)  
CAPACITOR, RUN (See Figure 38)  
(See Figure 36)  
Arun capacitor is wired across the auxiliary and main winding  
The defrost control bulb must be mounted securely and in the of a single phase permanent split capacitor motor such as the  
correct location to operate properly.  
compressor and fan motor. Asingle capacitor can be used for  
each motor or a dual rated capacitor can be used for both.  
The capacitor's primary function is to reduce the line current  
while greatly improving the torque characteristics of a motor.  
The capacitor also reduces the line current to the motor by  
improving the power factor of the load. The line side of the  
capacitor is marked with a red dot and is wired to the line side  
of the circuit.  
Figure 36  
Defrost Thermostat Bulb  
Location (All Heat Pump Models)  
Figure 38  
Dual Rated Run Capacitor Hook-up  
Slide the bu
end of the  
thermostat  
defrost und
the retainer
shown  
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.  
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:  
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.  
115 Volt - 5,000 ohms 3 watt  
230 Volt - 20,000 ohms 3 watt  
5. Repeat steps 3 and 4 to check fan motor capacitor.  
NOTE: Ashorted 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.  
Figure 37  
Resistor  
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 OUTDOOR COIL)  
(TO INDOOR 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.  
HEATING MODE (see Figure 41)  
In the heating mode of operation, liquid refrigerant from the  
indoor coil enters the heating check valve forcing the cooling  
check valve shut. The liquid refrigerant is directed into the  
liquid dryer after which the refrigerant is metered through the  
heating capillary tubes to outdoor coils. (Note: liquid refriger-  
ant will also be directed through the cooling capillary tubes in  
a continuous loop during the heating mode).  
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.  
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.  
(TO OUTDOOR COIL)  
(TO INDOOR COIL)  
COOLING MODE (See Figure 40)  
In the cooling mode of operation, liquid refrigerant from con-  
denser (liquid line) enters the cooling check valve forcing the  
heating check valve shut. The liquid refrigerant is directed  
into the liquid dryer after which the refrigerant is metered  
through cooling capillary tubes to evaporator. (Note: liquid  
refrigerant will also be directed through the heating capillary  
tubes in a continuous loop during the cooling mode).  
HEAT PUMPS: REVERSING VALVE (See Figure 42)  
A reversing valve is used to change the refrigerant flow within  
the system to permit heating or cooling.  
The reversing valve consists of a main valve body which houses  
the slide and piston, plus a pilot valve which is activated by a  
solenoid.  
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.  
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.  
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.  
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.  
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.  
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.  
Figure 42  
Reversing Valve  
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 NOTE: Do not start unit with solenoid coil removed from  
cooling position or in the mid-position.  
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.  
Figure 43  
Bellows Assembly  
Drain Pan Valve  
Check the operation of the valve by starting the system and  
switching the operation from "Cooling" to "Heating" and then  
back to "Cooling". Do not hammer on valve.  
If valve fails to change its position, test the voltage to the valve  
coil while the system is in the heating cycle. If voltage to coil is  
satisfactory, replace reversing valve.  
Should the valve fail to shift from cooling to heating, block the  
28  
VALVE, DRAIN PAN (See Figure 43)  
Should the fan motor fail or filter become clogged, the high  
During the cooling mode of operation, condensate which limit control will open and interrupt power to the heater before  
collects in the drain pan is picked up by the condenser fan reaching an unsafe temperature condition.  
blade and sprayed onto the condenser coil. This assists in  
cooling the refrigerant plus evaporating the water.  
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 The heating element for the "Y" model is energized by an  
outside temperatures. This could cause the condenser fan outdoor thermostat. The outdoor thermostat is adjusted at a  
blade to freeze in the accumulated water and prevent it from predetermined temperature to bring on the heating element  
turning.  
and turn off the compressor. The room thermostat will then  
control the cycling of the element when the selected indoor  
To provide a means of draining this water, a bellows type temperature is reached.  
drain valve is installed over a drain opening in the base pan.  
Testing of the elements can be made with an ohmmeter across  
This valve is temperature sensitive and will open when the the terminals after the connecting wires have been removed.  
outside temperature reaches 40°F. The valve will close A cold resistance reading of approximately 14.5 ohms for the  
gradually as the temperature rises above 40°F to fully close 3.3 KW heater, 11.9 ohms for the 4.0 KW heater and 9.15  
at 60°F.  
ohms for the 5.2 KW heater should be registered.  
SEALED REFRIGERATION SYSTEM REPAIRS  
IMPORTANT  
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.  
ANY SEALED SYSTEM REPAIRS TO HEAT PUMP  
MODELS REQUIRES THE INSTALLATION OF A  
SUCTION LINE DRIER IN THE SUCTION LINE  
BETWEEN THE EVAPORATORAND THE REVERSING  
VALVE.  
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  
2. Ammeter  
The heater element has a high limit control. This control is a  
bimetal thermostat mounted in the top of the heating element.  
3. Ohmmeter  
4. E.P.A. Approved Refrigerant Recovery System.  
5. Vacuum Pump (capable of 200 microns or less vacuum.)  
6. Acetylene Welder  
Figure 44 - Heating Element  
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  
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.  
EQUIPMENT MUST BE CAPABLE OF:  
1. Recovery CFC's as low as 5%.  
11. Break vacuum by charging system from the high side  
with the correct amount of refrigerant specified. This  
will prevent boiling the oil out of the crankcase.  
2. Evacuation from both the high side and low side of the  
system simultaneously.  
3. Introducing refrigerant charge into high side of the sys-  
tem.  
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.  
4. Accurately weighing the refrigerant charge actually in-  
troduced into the system.  
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.  
5. Facilities for flowing nitrogen through refrigeration tub-  
ing during all brazing processes.  
SPECIAL PROCEDURE IN THE CASE OF  
COMPRESSOR MOTOR BURNOUT  
1. Recover all refrigerant and oil from the system.  
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.)  
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%.  
3. Flush evaporator condenser and all connecting tubing  
with dry nitrogen or equivalent, to remove all  
contamination from system. Inspect suction and  
discharge line for carbon deposits. Remove and clean  
if necessary.  
4. Reassemble the system, including new drier strainer  
and capillary tube.  
2. Cut the process tube below pinch off on the suction  
side of the compressor.  
5. Proceed with processing as outlined under hermetic  
component replacement.  
3. Connect the line from the nitrogen tank to the suction  
process tube.  
4. Drift dry nitrogen through the system and un-solder the  
more distant connection first. (Filter drier, high side  
process tube, etc.)  
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.  
5. Replace inoperative component, and always install a  
new filter drier. Drift dry nitrogen through the system  
when making these connections.  
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.  
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.  
7. Leak test complete system with electric halogen leak  
detector, correcting any leaks found.  
8. Reduce the system to zero gauge pressure.  
REFRIGERANT CHARGING  
9. Connect vacuum pump to high side and low side of  
system with deep vacuum hoses, or copper tubing. (Do  
not use regular hoses.)  
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.  
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  
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.  
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:  
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.  
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 EPAregulations.  
An overcharged unit will at times return liquid refrigerant  
(slugging) back to the suction side of the compressor 3. Install a process tube to sealed system.  
eventually causing a mechanical failure within the compressor.  
This mechanical failure can manifest itself as valve failure, 4. Make necessary repairs to system.  
bearing failure, and/or other mechanical failure. The specific  
type of failure will be influenced by the amount of liquid being 5. Evacuate system to 250 - 300 microns or less.  
returned, and the length of time the slugging continues.  
6. Weigh in refrigerant with the property quantity of R-22  
Not enough refrigerant (Undercharge) on the other hand, will  
cause the temperature of the suction gas to increase to the  
refrigerant.  
point where it does not provide sufficient cooling for the 7. Start unit, and verify performance.  
compressor motor. When this occurs, the motor winding  
temperature will increase causing the motor to overheat and 8. Crimp the process tube and solder the end shut.  
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.  
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 EPARegulations. THIS SHOULD ONLY BEATTEMPTED BY QUALIFIED SERVICE PERSONNEL.  
Un d e rc h a rg e d Re frig e ra n t Sys te m s  
An undercharged system will result in poor performance (low Intermittent frosting and thawing of the evaporator is another  
pressures, etc.) in both the heating and cooling cycle.  
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 Checks for an undercharged system can be made at the  
before charging the unit.  
compressor . If the compressor seems quieter than normal, it  
is an indication of a low refrigerant charge. A check of the  
To check for an undercharged system, turn the unit on, allow amperage drawn by the compressor motor should show a  
the compressor to run long enough to establish working lower reading. (Check the Unit Specification.) After the unit  
pressures in the system (15 to 20 minutes).  
has run 10 to 15 minutes, check the gauge pressures.  
During the cooling cycle you can listen carefully at the exit of Gauges connected to system with an undercharge will have  
the metering device into the evaporator; an intermittent hissing low head pressures and substantially low suction pressures.  
and gurgling sound indicates a low refrigerant charge.  
31  
NOTE: Heat pump  
refrigeration  
drawing  
Ove rc h a rg e d Re frig e ra n t Sys te m s  
Compressor amps will be near normal or higher. An over charge can cause the compressor to fail, since it would  
Noncondensables can also cause these symptoms. To be "slugged" with liquid refrigerant.  
confirm, remove some of the charge, if conditions improve,  
system may be overcharged. If conditions don’t improve, The charge for any system is critical. When the compressor  
Noncondensables are indicated.  
is noisy, suspect an overcharge, when you are sure that the  
air quantity over the evaporator coil is correct. Icing of the  
Whenever an overcharged system is indicated, always make evaporator will not be encountered because the refrigerant  
sure that the problem is not caused by air flow problems. will boil later if at all. Gauges connected to system will usually  
Improper air flow over the evaporator coil may indicate some have higher head pressure (depending upon amount of  
of the same symptoms as an overcharged system.  
overcharge). Suction pressure should be slightly higher.  
32  
Re s tric te d Re frig e ra n t Sys te m  
A quick check for either condition begins at the evaporator. Troubleshooting a restricted refrigerant system can be  
With a partial restriction, there may be gurgling sounds at the difficult. The following procedures are the more common  
metering device entrance to the evaporator. The evaporator problems and solutions to these problems. There are two  
in a partial restriction could be partially frosted or have an ice types of refrigerant restrictions: Partial restrictions and  
ball close to the entrance of the metering device. Frost may complete restrictions.  
continue on the suction line back to the compressor.  
Often a partial restriction of any type can be found by feel, as A partial restriction allows some of the refrigerant to circulate  
there is a temperature difference from one side of the restriction through the system.  
to the other.  
With a complete restriction, there will be no sound at the With a complete restriction there is no circulation of refrigerant  
metering device entrance. An amperage check of the in the system.  
compressor with a partial restriction may show normal current  
when compared to the unit specification. With a complete Restricted refrigerant systems display the same symptoms  
restriction the current drawn may be considerably less than as a "low-charge condition."  
normal, as the compressor is running in a deep vacuum (no  
load.) Much of the area of the condenser will be relatively cool When the unit is shut off, the gauges may equalize very slowly.  
since most or all of the liquid refrigerant will be stored there.  
The following conditions are based primarily on a system in Gauges connected to a completely restricted system will run  
the cooling mode.  
in a deep vacuum. When the unit is shut off, the gauges will  
not equalize at all.  
33  
Rou tin e Ma in te n a n c e  
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  
* TEMPERATURE OF VALVE BODY  
CONDITION  
** WARMER THAN VALVE BODY  
1
2
3
4
5
6
POSSIBLE CAUSES CORRECTIONS  
Normal  
Cooling  
Hot  
Cool  
Cool Hot *TVB  
as (2) as (1)  
TVB  
Normal Heating  
Hot  
Cool  
Hot Cool *TVB  
as (1) as (2)  
TVB  
MALFUNCTION OF VALVE  
No voltage to coil.  
Repair electrical circuit.  
Replace coil.  
Check Electrical circuit and coil  
Defective coil.  
Valve will  
not shift  
from cool to  
heat.  
Low charge.  
Repair leak, recharge system.  
Recheck system.  
Check refrigeration charge  
Pressure differential too high.  
Pilot valve okay. Dirt in one  
bleeder hole.  
*TVB  
Hot  
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.  
Hot  
Cool  
Cool, Hot,  
as (1)  
as (2)  
Piston cup leak  
Stop unit. After pressures equalize, restart with  
solenoid energized. If valve shifts, reattempt  
with compressor running. If still no shift, replace  
valve.  
Hot,  
as (1)  
Hot,  
Hot  
Hot  
Cool  
Cool  
Cool,  
as (2)  
Cool,  
as (2)  
Clogged pilot tubes.  
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.  
*TVB  
Hot  
*TVB  
Hot  
Valve will  
not shift  
from cool to  
heat.  
Both ports of pilot open. (Back seat  
port did not close).  
as (1)  
Warm,  
as (1)  
Hot  
Warm  
Hot  
Cool  
Cool,  
as (2)  
Defective Compressor.  
Replace compressor  
*TVB  
*TVB  
Warm  
Hot  
Warm Warm  
Not enough pressure differential at  
start of stroke or not enough flow to  
maintain pressure differential.  
Body damage.  
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.  
Starts to  
shift but  
does not  
complete  
reversal.  
Hot  
Hot  
Hot  
Hot  
Warm Warm  
Both ports of pilot open.  
Hot  
Hot  
Hot  
Hot  
Hot  
Body damage.  
Replace valve  
*TVB  
Valve hung up at mid-stroke. Pumping Raise head pressure, operate solenoid. If no  
volume of compressor not sufficient to shift, use valve with smaller ports.  
maintain reversal.  
Hot  
Hot  
Hot  
Hot  
Hot  
Hot  
Hot,  
Both ports of pilot open.  
Raise head pressure, operate solenoid. If no  
shift, replace valve.  
Operate valve several times, then recheck. If  
excessive leak, replace valve.  
Hot  
Hot  
Cool,  
as (2)  
Cool,  
as (2)  
Cool,  
as (2)  
Cool  
Cool  
Cool  
Hot,  
as (1)  
Hot,  
as (1)  
Hot,  
Piston needle on end of slide leaking.  
*TVB  
*TVB  
Apparent  
leap in  
heating.  
Pilot needle and piston needle leaking. Operate valve several times, then recheck. If  
excessive leak, replace valve.  
Pressure differential too high.  
**  
WVB  
*TVB  
**  
WVB  
*TVB  
Stop unit. Will reverse during equalization  
period. Recheck system  
as (1)  
Clogged pilot tube.  
Raise head pressure, operate solenoid to free  
dirt. If still no shift, replace valve.  
Cool,  
as (2)  
Hot  
Hot  
Cool  
Cool  
Hot,  
as (1)  
Dirt in bleeder hole.  
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.  
Hot  
Hot  
*TVB  
*TVB  
Will not shift  
from heat to  
cool.  
Cool,  
as (2)  
Hot,  
as (1)  
Piston cup leak.  
Cool,  
as (2)  
Cool,  
as (2)  
Hot  
Cool  
Cool  
Hot,  
as (1)  
Warm,  
as (1)  
Defective pilot.  
Replace valve.  
Hot  
Hot  
Warm  
Defective compressor.  
Replace compressor  
Warm  
*TVB  
35  
Troubleshooting: Cooling  
PROBLEM  
POSSIBLE CAUSE  
TO CORRECT  
Low voltage.  
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.  
Thermostat not set cold enough or  
inoperative.  
Compressor does not  
run.  
Compressor hums but cuts off on  
overload.  
Open or shorted compressor  
windings.  
Hard start compressor. Direct test compressor. If  
compressor starts, add starting components.  
Check for continuity and resistance.  
Open overload.  
Open capacitor.  
Inoperative system switch.  
Test overload protector and replace if inoperative.  
Test capacitor and replace if inoperative.  
Test for continuity in all positions. Replace if  
inoperative.  
Broken, loose or incorrect wiring.  
Refer to appropriate wiring diagram to check wiring.  
PROBLEM  
TO CORRECT  
POSSIBLE CAUSE  
Inoperative system switch.  
Broken, loose or incorrect wiring.  
Open Capacitor.  
Fan speed switch open.  
Inoperative fan motor.  
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.)  
Fan motor  
does not run.  
PROBLEM  
POSSIBLE CAUSE  
TO CORRECT  
Undersized unit.  
Refer to Sizing Charts.  
Thermostat open or inoperative.  
Set to coldest position. Test thermostat and  
replace if necessary.  
Dirty filter.  
Dirty or plugged condenser or  
evaporator coil.  
Clean as recommended in Owner’s Manual.  
Use steam or detergents to clean.  
Does not cool, or cools  
only slightly.  
Poor air circulation in area being  
cooled.  
Adjust discharge air louvers. Use high fan  
speed.  
Fresh air or exhaust air door open  
on applicable models.  
Low capacity – undercharge.  
Compressor not pumping properly.  
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  
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.  
Fuse blown or circuit tripped.  
Unit does not run.  
Power cord not plugged in.  
System switch in "Off" position.  
Inoperative system switch.  
Loose or disconnected wiring at switch or  
other components.  
36  
PROBLEM  
TO CORRECT  
POSSIBLE CAUSE  
Dirty filter.  
Restricted air flow.  
Clean as recommended in Owner’s Manual.  
Check for dirty or obstructed coil - clean as re-  
quired.  
Test for shorted thermostat or stuck contacts.  
De-ice coil and check for leak.  
Evaporator coil  
freezes up.  
Inoperative thermostat.  
Short of refrigerant.  
Inoperative fan motor.  
Partially restricted capillary.  
Test fan motor and replace if inoperative.  
De-ice coil. Check temperature differential across  
coil. Touch test coil return bends for same tempera-  
ture. Test for low running current.  
PROBLEM  
POSSIBLE CAUSE  
TO CORRECT:  
Excessive heat load.  
Unit undersized. Test cooling performance of unit.  
Replace with larger unit.  
Compressor runs  
continually.  
Restriction in line.  
Refrigerant leak.  
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.  
Does not cycle off.  
Thermostat contacts stuck  
Thermostat incorrectly wired.  
POSSIBLE CAUSE  
Check operation of thermostat. Replace if contacts  
remain closed.  
Refer to appropriate wiring diagram.  
PROBLEM  
TO CORRECT:  
Thermostat contacts stuck.  
Replace thermostat.  
Thermostat set at coldest point.  
Turn to higher temperature setting to see if the unit  
cycles off.  
Thermostat does not  
turn unit off.  
Incorrect wiring.  
Unit undersized for area to be cooled.  
Refer to appropriate wiring diagram.  
Refer to Sizing Chart.  
PROBLEM  
POSSIBLE CAUSE  
TO CORRECT  
Overload inoperative. Opens too soon.  
Check operation of unit. Replace overload if  
system operation is satisfactory.  
Compressor attempts to start before  
system pressures are equalized.  
Allow a minimum of two (2) minutes for pressures  
to equalize before attempting to restart. Instruct  
customer of waiting period.  
Low or fluctuating voltage.  
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.  
Compressor attempts  
to start, or runs for  
short periods only.  
Cycles on overload.  
Incorrect wiring.  
Shorted or incorrect capacitor.  
Restricted or low air flow through  
condenser coil.  
Compressor running abnormally hot.  
Check for proper fan speed or blocked condenser.  
Check for kinked discharge line or restricted condenser.  
Check amperage.  
PROBLEM  
TO CORRECT  
POSSIBLE CAUSE  
Loss of charge in thermostat bulb.  
Place jumper across thermostat terminals to check  
if unit operates. If unit operates, replace thermostat.  
Thermostat does not  
turn unit on.  
Loose or broken parts in thermostat.  
Incorrect wiring.  
Check as above.  
Refer to appropriate wiring diagram.  
37  
TO CORRECT  
PROBLEM  
POSSIBLE CAUSE  
Poorly installed unit.  
Refer to Installation Instructions for proper  
installation.  
Fan blade striking chassis.  
Compressor vibrating.  
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.  
Noisy operation.  
Improperly mounted or loose cabinet  
parts.  
Check assembly and parts for looseness,  
rubbing and rattling.  
PROBLEM  
POSSIBLE CAUSE  
TO CORRECT  
Evaporator drain pan overflowing.  
Clean obstructed drain trough.  
Condensation forming on base pan.  
Evaporator drain pan broken or cracked. Reseal or  
replace.  
Water leaks into room.  
Poor installation resulting in rain  
entering room.  
Check Installation Instructions. Reseal as required.  
Condensation on discharge grilles.  
Dirty evaporator coil - clean.  
Very high humidity level.  
POSSIBLE CAUSE  
TO CORRECT  
Replace thermostat.  
Check gasket. Reposition or replace.  
PROBLEM  
Thermostat differential too narrow.  
Plenum gasket not sealing, allowing  
discharge air to short cycle thermostat.  
Restricted coil or dirty filter.  
Thermostat short  
cycles.  
Clean and advise customer of periodic cleaning of  
filter.  
Replace tubular insulation on bulb.  
(Applicable models.)  
Tubular insulation missing from top of  
thermostat bulb.  
Adjust bulb bracket.  
(Applicable models.)  
Thermostat bulb touching thermostat  
bulb support bracket.  
POSSIBLE CAUSE  
PROBLEM  
TO CORRECT  
Anticipator (resistor) wire disconnected Refer to appropriate wiring diagram.  
at thermostat or system switch.  
Anticipator (resister shorted or open).  
(Applicable models.)  
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.  
Prolonged off-cycles.  
(automatic operation)  
Partial loss of charge in thermostat  
bulb causing a wide differential.  
Replace thermostat.  
TO CORRECT  
Change room thermostat.  
POSSIBLE CAUSE  
Thermostat sticking.  
PROBLEM  
Switches from  
Incorrect wiring.  
Refer to appropriate wiring diagram.  
cooling to heating.  
38  
PROBLEM  
POSSIBLE CAUSE  
TO CORRECT  
Evaporator drain pan cracked or  
obstructed.  
Water in compressor area.  
Repair, clean or replace as required.  
Outside water leaks.  
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.  
Obstructed condenser coil.  
Fan blade and slinger ring improperly  
positioned.  
PROBLEM  
POSSIBLE CAUSE  
TO CORRECT  
Insufficient air circulation in air condi-  
tioned area.  
Oversized unit.  
Adjust louvers for best possible air circulation  
High indoor  
humidity.  
Operate in "Fan-Auto (MoneySaver)" position.  
Advise customer.  
Inadequate vapor barrier in building  
structure, particularly floors.  
39  
Troubleshooting: Heating (Heat pumps)  
PROBLEM  
POSSIBLE CAUSE  
TO CORRECT  
Thermostat setting.  
Defective thermostat.  
Compressor not operating.  
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  
No heating — fan  
operates.  
Defective system switch.  
PROBLEM  
POSSIBLE CAUSE  
TO CORRECT  
Restricted filter.  
Outdoor thermostat.  
(Applicable models.)  
Clean as recommended in Owner’s Manual.  
Check if outdoor thermostat is energizing the heating  
element at its predetermined temperature setting  
Check control setting.  
Insufficient heating.  
Fresh air or exhaust door open.  
POSSIBLE CAUSE  
TO CORRECT  
PROBLEM  
Inoperative system switch.  
Check continuity of switch.  
Fan operates in  
"constant" position, but  
not in "automatic"  
(MoneySaver).  
Incorrect wiring.  
Check applicable wiring diagram.  
TO CORRECT  
PROBLEM  
POSSIBLE CAUSE  
Incorrect differential setting. Replace thermostat.  
Check voltage to resistor. If voltage okay, remove  
resistor from thermostat bulb block. With current on,  
feel resistor for warmth. If no heat can be felt,  
replace anticipator.  
Defective thermostat.  
Heat anticipator (resistor) shorted.  
(Applicable models)  
Temperature varies from  
comfortable to overly  
warm.  
POSSIBLE CAUSE  
PROBLEM  
TO CORRECT  
Heat anticipator (resistor) shorted.  
(Applicable models.)  
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.  
Room temperature  
uneven.  
(Heating cycle)  
Wide differential — partial loss of ther-  
mostat bulb charge.  
Replace thermostat and check.  
Incorrect wiring.  
Refer to appropriate wiring diagram. Resistor is  
energized during the "on" cycle of compressor or  
fan.  
POSSIBLE CAUSE  
Incorrect wiring.  
Defrost control timer motor not advanc-  
ing.  
TO CORRECT  
PROBLEM  
Refer to appropriate wiring diagram.  
Check for voltage at "TM" and "TM1" on timer. If  
voltage, replace control.  
If outside coil temperature is 25° F or below, and  
preselected time limit has elapsed, replace the  
defrost control.  
If the contacts remain closed between terminals "2"  
and "3" of the defrost control after preselected time  
interval has passed, replace control.  
Reinstall and assure that good bulb to coil contact is  
made.  
Unit will not defrost.  
Defrost control out of calibration.  
Defrost control contacts stuck.  
Defrost control bulb removed from coil,  
or not making good coil contact.  
40  
PROBLEM  
POSSIBLE CAUSE  
TO CORRECT  
Outdoor thermostat does not cut off  
compressor at the preselected tem-  
perature and bring on heating element.  
Fresh air or exhaust door open.  
Defective thermostat - replace.  
Unit does not heat  
adequately.  
Check if operating properly. Instruct customer  
on proper use of control.  
Dirty filter.  
Unit undersized.  
Clean as recommended in Owner’s Manual.  
Check heat rise across coil. Refer to perfor-  
mance data sheet on heat rise at various  
outdoor ambients. If heat rise is satisfactory,  
check if insulation can be added to attic or  
walls.  
PROBLEM  
POSSIBLE CAUSE  
TO CORRECT  
Incorrect wiring.  
Defective solenoid coil.  
Reversing valve fails to shift.  
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.  
Unit cools when  
heat is called for.  
Inoperative system switch.  
Check for continuity of system switch.  
PROBLEM  
TO CORRECT  
POSSIBLE CAUSE  
Outdoor thermostat does not cut off  
compressor at the preselected tempera-  
ture and bring on the heating element.  
Defective thermostat — replace.  
Unit does not heat  
adequately.  
Fresh air or exhaust door open.  
Check if operating properly. Instruct customer on  
proper use of control.  
Dirty filter.  
Unit undersized.  
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.  
TO CORRECT  
PROBLEM  
POSSIBLE CAUSE  
Incorrect wiring.  
Defective solenoid coil.  
Reversing valve fails to shift.  
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.  
Unit cools when  
heat is called for.  
Inoperative system switch.  
POSSIBLE CAUSE  
PROBLEM  
TO CORRECT  
Heating capillary tube partially  
restricted.  
Check valve leaking internally.  
Check for partially starved outer coil. Replace heating  
capillary tube.  
Switch unit several times from heating to cooling.  
Check temperature rise across the coil. Refer to  
specification sheet for correct temperature rise.  
Deenergize solenoid coil, raise head pressure, ener-  
gize solenoid to break loose. If valve fails to make  
complete shift, replace valve.  
Cooling is ad-  
equate, but heating  
is insufficient.  
Reversing valve failing to shift  
completely — bypassing hot gas.  
41  
PROBLEM  
POSSIBLE CAUSE  
TO CORRECT  
Refer to the heating data on applicable models for  
the preselected temperature the compressor shuts  
off and the electric element is energized.  
Outdoor thermostat.  
(Applicable models.)  
Compressor will not turn  
off and operate on heating  
element only during low  
outside ambients.  
TO CORRECT  
PROBLEM  
POSSIBLE CAUSE  
Fuse link.  
Check fuse link for continuity. If defective, replace.  
Compressor shuts off on  
outdoor thermostat but  
element does not heat.  
Heating element shorted.  
Incorrect wiring.  
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  
POSSIBLE CAUSE  
TO CORRECT  
Heater relay or contactor coil open.  
Heater relay or contactor stuck open,  
pitted or burned.  
High limit control open.  
Open thermal fuse.  
Check continuity of coil.  
Inspect, test continuity with ohmmeter.  
Fan Operates –  
heating element does  
not come on.  
Check continuity – if open, replace.  
Check continuity. Check reason for failure.  
Check voltage across heater terminals. Check  
amperage draw of heater.  
Open or shorted element.  
Loose connections.  
Tighten all terminals.  
PROBLEM  
POSSIBLE CAUSE  
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.  
Restricted filter.  
Cycling high limit control.  
Heating inadequate.  
Check position of fresh air door control slide. Adjust  
cable if door does not close properly.  
Exhaust or fresh air door open.  
TO CORRECT  
POSSIBLE CAUSE  
PROBLEM  
Fan relay contacts open.  
Check continuity of fan relay. NOTE: Some models  
have the fan relay energized during the heating  
cycle while others do not.  
Fan operates in "Con-  
stant" position, but not in  
"Automatic" (Money-  
Saver).  
Inoperative system switch.  
Loose connection.  
Check continuity between terminals "L2" and "3" of  
the system switch.  
Check connections on system switch and fan relay.  
PROBLEM  
TO CORRECT  
POSSIBLE CAUSE  
Heat anticipator (resistor) shorted.  
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.  
Long "off" and "on"  
cycles.  
Defective thermostat.  
Replace thermostat and check operation.  
TO CORRECT  
POSSIBLE CAUSE  
PROBLEM  
Defective motor.  
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.  
Fan motor does not  
operate in "Constant"  
or "MoneySaver"  
position.  
Open or shorted capacitor.  
Condenser fan frozen to base pan.  
Loose connections.  
PROBLEM  
POSSIBLE CAUSE  
TO CORRECT  
Check for partially starved outer coil. Replace  
heating capillary tube.  
Heating capillary tube partially restricted.  
Switch unit several times from heating to cooling.  
Check temperature rise across coil. Refer to specifi-  
cation sheet for correct temperature rise.  
Deenergize solenoid coil, raise head pressure,  
energize solenoid to break loose. If valve fails to  
make complete shift, replace valve.  
Check valve leaking internally.  
Cooling adequate,  
heating insufficient.  
Reversing valve failing to shift  
completely – bypassing hot gas.  
43  
POSSIBLE CAUSE  
TO CORRECT  
PROBLEM  
Outdoor thermostat.  
(Applicable models.)  
Refer to the heating data on applicable models for  
the preselected temperature the compressor shuts  
off and the electric element is energized.  
Compressor will not  
turn off and operate on  
heating element only  
during low outside  
ambients.  
Trou b le s h ootin g Ch a rt — Coolin g  
REFRIGERANT S YS TEM  
DIAGNOS IS COOLING  
Low Suction Pressure  
Low Load Conditions  
High Suction Pressure  
High Load Conditions  
Low Head Pressure  
Low Load Conditions  
High Head Pressure  
High Load Conditions  
Low Air Flow Across  
Indoor Coil  
High Air Flow Across  
Indoor Coil  
Refrigerant System  
Restriction  
Low Air Flow Across  
Outdoor Coil  
Refrigerant System  
Restriction  
Reversing Valve not  
Fully Seated  
Reversing Valve not  
Fully Seated  
Overcharged  
Undercharged  
Overcharged  
Undercharged  
in System  
Noncondensables (air)  
Moisture in System  
Defective Compressor  
Defective Compressor  
44  
Trou b le s h ootin g Ch a rt — He a tin g  
REFRIGERANT S YS TEM  
DIAGNOS IS – HEATING  
High Head Pressure  
Low Suction Pressure  
High Suction Pressure  
Low Head Pressure  
Outdoor Ambient Too High  
for Operation in Heating  
Outdoor Ambient Too High  
For Operation In Heating  
Low Airflow  
Across Outdoor Coil  
Refrigerant System  
Restriction  
Low Airflow Across  
Indoor Coil  
Refrigerant System  
Restriction  
Reversing Valve not  
Fully Seated  
Reversing Valve not  
Fully Seated  
Undercharged  
Overcharged  
Overcharged  
Undercharged  
Noncondensables (air) in  
System  
Defective Compressor  
Defective Compressor  
Moisture in System  
Ele c tric a l Trou b le s h ootin g Ch a rt  
(He a t P u m p )  
HEAT P UMP  
SYSTEM COOLS WHEN  
HEATING IS DESIRED.  
Is the Selector Switch  
Is Line Voltage  
Present at the Solenoid  
YES  
Set for Heat?  
NO  
NO  
Is the Solenoid Coil Good?  
Replace the Solenoid Coil  
YES  
Reversing Valve Stuck  
Replace the Reversing Valve  
45  
MODELS  
RS10J10C, RS12J10A-B, RS15J10A, RS16J30A-A, RS18J30A, RM24J30-A  
COMPRESSOR  
TERMINAL  
ORIENTATION  
MAY VARY.  
REFER TO  
MARKINGS ON  
COMPRESSOR  
WIRING DIAGRAM  
COMPRESSOR  
R
BLUE  
RED  
RED  
BLACK  
PURPLE  
SWITCH  
SYSTEM  
OVERLOAD  
PROTECTOR  
ALTERNATE  
COMPRESSOR  
2
M S  
BLUE  
C
L O  
L L  
L 1  
COMPRESSOR  
WIRE HARNESS  
M
H
SWITCH,  
ROCKER (GE)  
ANTICIPATOR  
RESISTOR  
THERMOSTAT  
BLACK  
BLACK  
CAPACITOR  
RED  
c
WHITE  
BLACK  
BLUE  
ORANGE  
RED  
BROWN  
TO CAPACITOR  
BRACKET  
BLUE  
SUPPLY CORD  
TO CHASSIS  
OR GREEN/YELLOW  
FAN  
MOTOR  
TO INNERWALL/  
MOTOR MOUNT  
TO CAPACITOR  
BRACKET  
SCHEMATIC  
L2  
L1  
AR  
IDT  
R
OVLD  
1
2
2
1
L1  
C
COMPR  
S
C
HERM  
C
CAP  
2
HIGH  
MS  
H
3
3
YES  
R
OVLD  
2
MEDIUM  
LOW  
MS  
M
L
MTR  
S
4
5
6
FAN  
CAP  
C
N0  
1
LL  
SYS SW  
X = CLOSED  
0 = OPEN  
SWITCH LOGIC  
SWITCH POSITION  
L E G E N D  
- ANTICIPATOR RESISTOR  
- MONEY SAVER/ROCKER SWITCH  
AR  
MS  
CIRCUIT  
1
2
3
4
5
6
CAP  
- CAPACITOR  
O
X
X
X
O
X
O
O
O
O
X
O
O
O
O
X
O
O
O
O
X
O
O
O
O
X
O
O
O
O
O
O
O
O
O
X
OFF  
COMPR  
- COMPRESSOR  
- GROUND LEAD  
- COMBINATION TERMINAL  
LOW COOL  
MED COOL  
HI COOL  
FAN ONLY  
LL COOL  
MTR  
- FAN MOTOR  
OVLD  
SYS SW  
IDT  
- OVERLOAD PROTECTOR  
- SYSTEM SWITCH  
- PLASTIC INSULATOR  
- INDOOR THERMOSTAT  
PART NO.  
619-405-00  
REV  
00  
46  
MODELS  
SQ06J10B-B, SQ06J10B-A, SQ08J10C-A, SQ08J10D-A  
WIRING DIAGRAM  
RED  
PURPLE  
COMPRESSOR  
C
BLUE  
2
BLUE  
M S  
"F"  
C
"F"  
"F"  
M
L
H
L 1  
SWITCH  
SYSTEM  
BROWN  
C
SWITCH  
ROCKER (GE)  
HARNESS, COMPR.  
1
3
NOTE:  
OPTIONAL  
2
ANTICIPATOR  
RESISTOR  
CONFIGURATION  
SUPPLY CORD  
THERMOSTAT  
BLACK  
WHITE  
CAPACITOR  
RED  
C
RED  
TO CAPACITOR  
BRACKET  
BLUE  
BLACK  
BLUE  
BROWN  
TO INNERWALL/  
MOTOR MOUNT  
FAN  
MOTOR  
SCHEMATIC  
L2  
L1  
AR  
IDT  
R
OVLD  
1
2
1
COMPR  
S
L1  
C
C
HERM  
C
CAP  
2
3
2
HIGH  
MS  
H
3
NO  
R
OVLD  
2
MEDIUM  
LOW  
MS  
M
L
MTR  
S
4
5
FAN  
C
YES  
1
CAP  
SYS SW  
X = CLOSED  
0 = OPEN  
SWITCH LOGIC  
SWITCH POSITION  
L E G E N D  
- ANTICIPATOR RESISTOR  
- MONEY SAVER/ROCKER SWITCH  
AR  
MS  
CIRCUIT  
CAP  
COMPR  
- CAPACITOR  
- COMPRESSOR  
1
2
3
4
5
- GROUND LEAD  
- COMBINATION TERMINAL  
O
X
X
X
O
O
O
O
O
X
O
O
O
X
O
O
O
X
O
O
O
X
O
O
O
OFF  
MTR  
- FAN MOTOR  
LOW COOL  
MED COOL  
HI COOL  
FAN ONLY  
OVLD  
SYS SW  
IDT  
- OVERLOAD PROTECTOR  
- SYSTEM SWITCH  
- PLASTIC INSULATOR  
- INDOOR THERMOSTAT  
PART NO.  
619-142-15  
REV.  
01  
47  
MODELS  
KQ05J10B-B, KQ05E10-C KQ06J10B-A, KQ06J10B-B, KQ06E10-A, KQ06E10-B  
WIRING DIAGRAM  
PTCR  
CAPACITOR  
(OPTIONAL)  
RED  
FAN MOTOR  
BLACK  
WHITE  
WIRE HARNESS  
BROWN  
RED  
BLACK  
HERM  
BLACK  
BLACK  
BLUE  
RED  
S
C R  
THERMOSTAT  
BLACK  
BLACK  
2
L
C
H
COMPRESSOR  
SYSTEM SWITCH  
1
GREEN/YELLOW  
L1  
SMOOTH (OR BROWN) CONDUCTOR  
TO GND  
SEE DETAIL " A "  
SCREW  
SUPPLY CORD  
DETAIL " A " OPTIONAL WIRING  
RED  
BLACK  
SYSTEM SWITCH SEQUENCE  
ANTI-ICE  
CONTROL  
BLK  
BLK  
2
L
C
H
BLK  
CW ROT  
OFF  
CONNECTION  
ALL OPEN  
1
SYSTEM SWITCH  
L1  
WHITE  
THERMOSTAT  
HI FAN  
LO FAN  
LO COOL  
HI COOL  
L1-H  
L1-L  
L1-L,L1-C  
L1-H,L1-C  
DETAIL " B " OPTIONAL SCHEMATIC  
SCHEMATIC  
ANTI-ICE  
CONTROL  
T\STAT  
L
H
C
RED  
BLACK  
LINE  
L1  
H
SYSTEM SWITCH  
L
C
RED  
T/STAT  
OLVD  
SEE DETAIL "B"  
BLACK  
FAN MOTOR  
CAPACITOR  
C
BROWN  
C
R
F
H
S
PTCR (OPTIONAL)  
COMPRESSOR  
WHITE  
LINE  
RIBBED CONDUCTOR  
PART NO.  
619-046-01  
REV.  
01  
LEGEND:  
= OPTIONAL FACTORY WIRING  
PTCR = START ASSIST DEVICE  
48  
MODELS  
KQ08J10B-1, KQ08J10B-A, KQ08J10C-A  
WIRING DIAGRAM  
WIRE HARNESS  
R S  
C
CAPACITOR  
PTCR  
(OPTIONAL)  
RED  
BLACK  
04  
1
FAN MOTOR  
WHITE  
R
C S  
BROWN  
RED  
BLUE  
BLUE  
NOTE:  
BLACK  
HERM  
BLACK  
OPTIONAL  
CONFIGURATION  
BLACK  
RED  
THERMOSTAT  
BLK  
2
L
C
H
BLACK  
1
GREEN  
L1  
SYSTEM SWITCH  
BROWN  
BROWN  
TO GND  
SCREW  
SEE DETAIL " A "  
SUPPLY CORD  
DETAIL " A " OPTIONAL WIRING  
RED  
04  
BLACK  
SYSTEM SWITCH SEQUENCE  
ANTI-ICE  
BLK  
CONTROL  
2
L
C
H
BLK OR  
BLK OR  
CW ROT  
OFF  
CONNECTION  
ALL OPEN  
1
SYSTEM SWITCH  
RED  
RED  
L1  
BROWN  
THERMOSTAT  
HI FAN  
LO FAN  
LO COOL  
HI COOL  
L1-H  
L1-L  
L1-L,L1-C  
L1-H,L1-C  
DETAIL " B " OPTIONAL SCHEMATIC  
ANTI-ICE  
SCHEMATIC  
CONTROL  
T/STAT  
L
H
C
RED  
BLACK  
LINE  
SYSTEM SWITCH  
L1  
L
H
C
RED  
T\STAT  
OLVD  
SEE DETAIL "B"  
BLACK  
FAN MOTOR  
CAPACITOR  
C
BRN  
F
C
R
H
S
PTCR (OPTIONAL)  
COMPRESSOR  
WHITE  
LINE  
BLUE  
PART NO.  
617-581-04  
REV.  
04  
LEGEND:  
= OPTIONAL FACTORY WIRING  
PTCR = START ASSIST DEVICE  
49  
MODELS  
XQ05J10-B, XQ06J10-A, XQ06J10-B, XQ08J10-1, XQ08J10-A, XQ08J10A-A  
COMPRESSOR  
ELECTRONIC  
CONTR  
OL  
TERMINAL  
ORIENTATION  
MAY VARY.  
WIRING DIAGRAM  
COMPRESSOR  
REFER TO  
MARKINGS ON  
COMPRESSOR  
TRANSFORMER  
RELAY  
RELAY  
BLACK  
BLUE  
OVERLOAD  
PROTECTOR  
COM  
NO  
RELAY  
RED  
COMPRESSOR  
WIRE HARNESS  
SUPPLY CORD  
BLACK  
WHITE  
WHITE  
CAPACITOR  
c
RED  
BLUE  
BLACK  
BROWN  
TO CAPACITOR  
BRACKET  
RED  
MOTOR WIRE  
HARNESS  
BLUE  
TO CAPACITOR  
BRACKET  
GREEN OR  
GREEN/YELLOW  
FAN  
MOTOR  
TO INNERWALL/  
MOTOR MOUNT  
TO CHASSIS  
SCHEMATIC  
L1  
NEUTRAL  
(115 V)  
HIGH  
1
2
3
R
MEDIUM  
LOW  
OVLD  
MTR  
FAN  
CAP  
C
S
S
OVLD  
NO  
COM  
COMPR  
R
5
HERM  
CAP  
C
C
ELECTRONIC CONTROL  
X = CLOSED  
O = OPEN  
L E G E N D  
SWITCH LOGIC  
SWITCH POSITION  
CIRCUIT  
CAP  
COMPR  
- CAPACITOR  
- COMPRESSOR  
1
2
3
4
5
O
X
O
O
O
O
X
O
O
O
O
X
O
O
O
O
O
X
X
X
- COMBINATION TERMINAL  
- GROUND LEAD  
OFF  
MTR  
- FAN MOTOR  
HI COOL  
MED COOL  
LOW COOL  
OVLD  
- OVERLOAD PROTECTOR  
PART NO.  
619-142-14  
REV.  
03  
50  
MODEL  
YQ06J10B-A  
BLACK  
RED  
WIRING DIAGRAM  
PTCR  
(OPTIONAL)  
BLUE  
BLACK  
CAPACITOR  
RED  
RED  
(HARNESS, COMPR. MOLDED)  
RIBBED (OR BLUE) CONDUCTOR  
WHITE  
BROWN  
RED  
BLACK  
BLUE  
HERM  
R
C
DEFROST CONTROL  
SOLENOID  
BLACK  
BLUE  
WHITE  
RED  
2
1
FAN MOTOR  
COMPRESSOR  
RED  
BLACK  
BLACK  
BLACK  
2
3
1
2
3
SYSTEM SWITCH  
WHITE  
4
1
THERMOSTAT  
GREEN  
C
SMOOTH (OR BROWN) CONDUCTOR  
BLUE  
TO GND  
SCREW  
SUPPLY CORD  
SCHEMATIC  
LINE  
C
SYSTEM  
SWITCH  
3
1
THERMOSTAT  
1
3
4
2
LOW  
HIGH  
COMPRESSOR  
C
2
S
SOLENOID  
FAN OVERLOAD  
FAN MOTOR  
C' OVLD.  
2
1
1
DEFROST CONTROL T/STAT.  
C
H
F
PTCR (OPTIONAL)  
RUN CAPACITOR  
LINE  
X = CLOSED  
O = OPEN  
SWITCH LOGIC  
SWITCH POSITION  
L E G E N D  
CIRCUIT  
1
2
3
4
5
O
X
X
O
O
X
O
O
O
O
O
X
O
O
O
O
O
O
O
O
OFF  
HI-FAN  
O
O
X
X
HI-COOL  
LO-COOL  
LO-HEAT  
HI-HEAT  
- OPTIONAL FACTORY WIRING  
CAP  
COMPR  
- CAPACITOR  
- COMPRESSOR  
X
X
X
O
O
- GROUND LEAD  
- COMBINATION TERMINAL  
MTR  
- FAN MOTOR  
O
OVLD  
SYS SW  
IDT  
- OVERLOAD PROTECTOR  
- SYSTEM SWITCH  
- PLASTIC INSULATOR  
- INDOOR THERMOSTAT  
- START ASSIST DEVICE  
PART NO.  
617-581-11  
REV.  
00  
PTCR  
51  
MODEL: SC06H10D  
52  
MODELS  
SS08J10R-B, SS08J10R-A, SS09J10C-A, SS10J10AR-A,  
SS12J10AR-B, SS14J10R-A, SS12J30D-A, SS16J30A-A,  
SS18J30R-A, SM20J30-A, SM24J30-A  
COMPRESSOR  
TERMINAL  
ORIENTATION  
MAY VARY.  
WIRING DIAGRAM  
COMPRESSOR  
R
REFER TO  
MARKINGS ON  
COMPRESSOR  
WHITE  
TRANSFORMER  
RED  
BLACK  
OVERLOAD  
PROTECTOR  
ALTERNATE  
COMPRESSOR  
NO  
COM  
BLACK  
BLUE  
RELAY  
COMPRESSOR  
WIRE HARNESS  
RELAY  
SUPPLY CORD  
ORANGE  
RED  
ROOM  
RELAY  
RELAY  
SENSOR  
DEFROST  
SENSOR  
ELECTR  
ONIC CONTRO  
L
WHITE  
WHITE  
BROWN  
CAPACITOR  
RED  
c
ORANGE  
TO CAPACITOR  
BRACKET  
BLUE  
RED  
BLACK  
BLUE  
TO CAPACITOR  
BRACKET  
GREEN OR  
GREEN/YELLOW  
FAN  
MOTOR  
TO INNERWALL/  
MOTOR MOUNT  
TO CHASSIS  
NEUTRAL  
L2  
(115 V)  
SCHEMATIC  
L1  
(230/208)  
HIGH  
F4  
F3  
F2  
F1  
R
S
MEDIUM  
LOW  
OVLD  
MTR  
FAN  
CAP  
C
SLEEP  
L1  
R
OVLD  
NO  
COM  
C
COMPR  
5
HERM  
CAP  
C
S
ELECTRONIC CONTROL  
X = CLOSED  
O = OPEN  
L E G E N D  
SWITCH LOGIC  
SWITCH POSITION  
CIRCUIT  
CAP  
COMPR  
- CAPACITOR  
- COMPRESSOR  
1
2
3
4
5
O
X
O
O
O
O
O
X
O
O
O
O
O
X
O
O
O
O
O
X
O
X
X
X
X
- COMBINATION TERMINAL  
- GROUND LEAD  
OFF  
HI COOL  
MTR  
- FAN MOTOR  
OVLD  
- OVERLOAD PROTECTOR  
MED COOL  
LOW COOL  
SLEEP  
PART NO.  
619-405-06  
REV.  
01  
53  
MODELS  
SL28J30B-A, SL35J30-A, SL35J30-B  
WIRING DIAGRAM  
COMPRESSOR TERMINAL  
ORIENTATION MAY VARY. REFER  
COMPRESSOR  
TO MARKING ON COMPRESSOR.  
RED  
"F"  
"F"  
"F"  
RED  
PURPLE  
BLACK  
SYSTEM SWITCH  
BLUE  
ALTERNATE  
COMPRESSOR  
C
BLUE  
L
2
M S  
OVERLOAD  
PROTECTOR  
L
M
1
H
BROWN  
HARNESS,  
COMPRESSOR  
MOLDED  
ROCKER SWITCH (GE)  
ANTICIPATOR  
RESISTOR  
BLACK OR WHITE  
BLACK  
CAPACITOR  
THERMOSTAT  
ORANGE  
BLUE  
RED  
c
WHITE  
BROWN  
SUPPLY CORD  
BLUE  
BLACK  
TO CAPACITOR  
BRACKET  
TO CHASSIS  
GREEN OR  
GREEN/YELLOW  
TO CAPACITOR  
BRACKET  
FAN  
MOTOR  
TO INNERWALL/  
MOTOR MOUNT  
BLUE  
SCHEMATIC  
L2  
L1  
AR  
IDT  
R
OVLD  
1
2
1
COMPR  
S
L1  
C
C
HERM  
C
CAP  
2
2
HIGH  
MS  
H
3
1
NO  
R
OVLD  
2
MEDIUM  
LOW  
MS  
M
MTR  
S
4
FAN  
CAP  
C
YES  
3
L
5
SYS SW  
X = CLOSED  
0 = OPEN  
SWITCH LOGIC  
SWITCH POSITION  
L E G E N D  
- ANTICIPATOR RESISTOR  
- MONEY SAVER/ROCKER SWITCH  
AR  
MS  
CIRCUIT  
CAP  
COMPR  
- CAPACITOR  
- COMPRESSOR  
1
2
3
4
5
- GROUND LEAD  
- COMBINATION TERMINAL  
O
X
X
X
O
O
O
O
O
X
O
O
O
X
O
O
O
X
O
O
O
X
O
O
O
OFF  
MTR  
- FAN MOTOR  
LOW COOL  
MED COOL  
HI COOL  
FAN ONLY  
OVLD  
SYS SW  
IDT  
- OVERLOAD PROTECTOR  
- SYSTEM SWITCH  
- PLASTIC INSULATOR  
- INDOOR THERMOSTAT  
PART NO.  
619-405-01  
REV.  
00  
54  
MODELS  
KS10E10-A, KS10J10-B, KS12E10-A, KS12J10B-A, KS15J10-A,  
KS12J30B-A, KS18J30-A, KM20J30-A, KM24J30-A  
WIRING DIAGRAM  
COMPRESSOR TERMINAL  
ORIENTATION MAY VARY. REFER  
COMPRESSOR  
TO MARKING ON COMPRESSOR.  
RED  
"F"  
"F"  
"F"  
RED  
PURPLE  
BLACK  
SYSTEM SWITCH  
BLUE  
ALTERNATE  
COMPRESSOR  
C
BLUE  
L
2
M S  
OVERLOAD  
PROTECTOR  
L
M
1
H
BROWN  
HARNESS,  
COMPRESSOR  
MOLDED  
ROCKER SWITCH (GE)  
ANTICIPATOR  
RESISTOR  
BLACK OR WHITE  
BLACK  
CAPACITOR  
THERMOSTAT  
ORANGE  
BLUE  
RED  
c
WHITE  
BROWN  
SUPPLY CORD  
BLUE  
BLACK  
TO CAPACITOR  
BRACKET  
TO CHASSIS  
GREEN OR  
GREEN/YELLOW  
TO CAPACITOR  
BRACKET  
FAN  
MOTOR  
TO INNERWALL/  
MOTOR MOUNT  
BLUE  
SCHEMATIC  
L2  
L1  
AR  
IDT  
R
OVLD  
1
2
1
COMPR  
S
L1  
C
C
HERM  
C
CAP  
2
2
HIGH  
MS  
H
3
1
NO  
R
OVLD  
2
MEDIUM  
LOW  
MS  
M
MTR  
S
4
FAN  
CAP  
C
YES  
3
L
5
SYS SW  
X = CLOSED  
0 = OPEN  
SWITCH LOGIC  
SWITCH POSITION  
L E G E N D  
- ANTICIPATOR RESISTOR  
- MONEY SAVER/ROCKER SWITCH  
AR  
MS  
CIRCUIT  
CAP  
COMPR  
- CAPACITOR  
- COMPRESSOR  
1
2
3
4
5
- GROUND LEAD  
- COMBINATION TERMINAL  
O
X
X
X
O
O
O
O
O
X
O
O
O
X
O
O
O
X
O
O
O
X
O
O
O
OFF  
MTR  
- FAN MOTOR  
LOW COOL  
MED COOL  
HI COOL  
FAN ONLY  
OVLD  
SYS SW  
IDT  
- OVERLOAD PROTECTOR  
- SYSTEM SWITCH  
- PLASTIC INSULATOR  
- INDOOR THERMOSTAT  
PART NO.  
619-405-01  
REV.  
00  
55  
MODELS  
ES12J33B-A, ES16J33A-A, EM18J34B-A, EL25J35-A, EL35J35-B, EK18J34A  
WIRING DIAGRAM  
RED  
BLUE  
COMPRESSOR  
TERMINAL  
ORIENTATION  
MAY VARY.  
REFER TO  
YELLOW  
MARKINGS ON  
COMPRESSOR  
RED  
ALTERNATE  
SYSTEM SWITCH  
BLUE  
COMPRESSOR  
M S  
H
4
3
2
COMPRESSOR  
WIRE HARNESS  
1
L 1  
M
5
BLUE  
RED  
L
A R  
C 2  
C
THERMOSTAT  
3
BLACK  
GRAY  
OVERLOAD  
PROTECTOR  
1
2
WHITE  
BLACK  
BLUE  
ORANGE  
BROWN  
FAN  
MOTOR  
PURPLE  
BLUE  
BLACK OR WHITE  
ANTICIPATOR  
RESISTOR  
ROCKER SWITCH  
(GE)  
SUPPLY  
CORD  
ORANGE  
RED  
c
RED  
RED  
BLUE  
RIBBED CONDUCTOR  
OR BLUE  
GREEN  
BROWN  
TO CAPACITOR  
BRACKET  
CAPACITOR  
TO CAPACITOR  
BRACKET  
HEATER  
TO CHASSIS  
SCHEMATIC  
L2  
L1  
L1  
1
MEDIUM  
M
MS  
R
1
2
3
NO  
OVLD  
2
HIGH  
LOW  
MS  
MTR  
H
L
C
FAN  
CAP  
YES  
3
S
4
5
3
IDT  
2
3
1
R
C
6
C
COMPR  
S
1
OVLD  
HERM  
C
2
4
7
C2  
CAP  
8
9
AR  
HL  
TF  
HTR  
AR  
10  
5
SYS SW  
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  
SWITCH LOGIC  
SWITCH POSITION  
L E G E N D  
AR  
MS  
- ANTICIPATOR RESISTOR  
HTR  
- HEATER  
- MONEY SAVER/ROCKER SWITCH  
- CAPACITOR  
HL  
TF  
- HEATER LIMIT  
- THERMAL FUSE  
OFF  
CAP  
LOW COOL  
MEDIUM COOL  
HIGH COOL  
HIGH HEAT  
MEDIUM HEAT  
LOW HEAT  
FAN ONLY  
COMPR  
MTR  
OVLD  
- COMPRESSOR  
- GROUND LEAD  
- FAN MOTOR  
- COMBINATION TERMINAL  
- PLASTIC INSULATOR  
- OVERLOAD PROTECTOR  
SYS SW  
IDT  
- SYSTEM SWITCH  
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  
- INDOOR THERMOSTAT  
PART NO.  
619-405-02  
REV.  
00  
56  
MODELS  
YS12J33-A, YM18J34B-A, YL24J35C-A  
RED  
WIRING DIAGRAM  
BLUE  
COMPRESSOR  
TERMINAL  
ORIENTATION  
MAY VARY.  
REVERSING  
VALVE ASY  
REFER TO  
MARKINGS ON  
COMPRESSOR  
RED  
SYSTEM SWITCH  
THERMOSTAT  
3
M S  
BLUE  
4
3
2
1
ALTERNATE  
L 1  
M
5
1
2
YELLOW  
COMPRESSOR  
BLUE  
COMPRESSOR  
WIRE HARNESS  
L
H
A R  
C 2  
C
BLUE  
RED  
GRAY  
BLACK  
OVERLOAD  
PROTECTOR  
YELLOW  
DEFROST  
THERMOSTAT  
WHITE  
BLACK  
BLUE  
ORANGE  
BROWN  
BLACK  
FAN  
MOTOR  
3
2
ORANGE  
1
BLACK  
PURPLE  
BLUE  
BLACK OR WHITE  
ANTICIPATOR  
RESISTOR  
ROCKER SWITCH  
(GE)  
ORANGE  
RED  
SUPPLY  
CORD  
c
RED  
RED  
RIBBED CONDUCTOR OR BLUE  
BLUE  
GREEN  
BROWN  
TO CAPACITOR  
BRACKET  
CAPACITOR  
HEATER  
TO CAPACITOR  
BRACKET  
TO CHASSIS  
SCHEMATIC  
L2  
L1  
L1  
1
MEDIUM  
M
MS  
R
3
2
3
YES  
OVLD  
2
HIGH  
LOW  
MS  
H
L
MTR  
FAN  
CAP  
C
NO  
1
S
4
R
3
3
1
ODT  
2
IDT  
2
OVLD  
3
1
5
6
COMPR  
C
C
HERM  
C
1
S
CAP  
2
4
7
C2  
HL  
TF  
RV  
HTR  
8
9
AR  
10  
5
SYSTEM SWITCH  
X = CLOSED  
0 = OPEN  
CIRCUIT  
SWITCH LOGIC  
SWITCH POSITION  
L E G E N D  
AR  
MS  
- ANTICIPATOR RESISTOR  
- MONEY SAVER  
- CAPACITOR  
HTR  
- HEATER  
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  
HL  
TF  
- HEATER LIMIT  
- THERMAL FUSE  
OFF  
CAP  
LOW COOL  
MEDIUM COOL  
HIGH COOL  
HIGH HEAT  
MEDIUM HEAT  
LOW HEAT  
FAN ONLY  
COMPR  
MTR  
OVLD  
- COMPRESSOR  
- FAN MOTOR  
- GROUND LEAD  
- COMBINATION TERMINAL  
- PLASTIC INSULATOR  
- OVERLOAD  
RV  
- REVERSING VALVE  
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  
IDT  
ODT  
- INDOOR THERMOSTAT  
- OUTDOOR THERMOSTAT  
PART NO.  
619-405-04  
REV.  
01  
57  
MODEL  
YS09J10B-A  
RED  
WIRING DIAGRAM  
BLUE  
COMPRESSOR  
TERMINAL  
ORIENTATION  
MAY VARY.  
REFER TO  
MARKINGS ON  
COMPRESSOR  
SYSTEM  
SWITCH  
RED  
THERMOSTAT  
3
REVERSING  
VALVE  
M S  
H
BLUE  
4
3
2
ALTERNATE  
1
1
5
L
1
2
COMPRESSOR  
YELLOW  
COMPRESSOR  
WIRE HARNESS  
L
M
A R  
C
C 2  
GRAY  
BLUE  
RED  
BLACK  
BLACK  
OVERLOAD  
PROTECTOR  
DEFROST  
THERMOSTAT  
YELLOW  
WHITE  
BLACK  
BLUE  
ORANGE  
BROWN  
FAN  
MOTOR  
3
1
2
PINK  
PURPLE  
BLUE  
BLACK OR WHITE  
ROCKER SWITCH  
(GE)  
ANTICIPATOR  
RESISTOR  
SUPPLY  
CORD  
RED  
c
RED  
RIBBED CONDUCTOR OR BLUE  
BLUE  
GREEN  
BROWN  
TO CAPACITOR  
BRACKET  
CAPACITOR  
TO CAPACITOR  
BRACKET  
TO CHASSIS  
SCHEMATIC  
L2  
L1  
L1  
1
MEDIUM  
M
MS  
R
2
3
1
NO  
OVLD  
2
HIGH  
LOW  
MS  
H
L
MTR  
S
FAN  
C
YES  
3
4
CAP  
R
3
IDT  
2
OVLD  
3
1
5
6
7
COMPR  
C
C
HERM  
C
1
S
2
4
C2  
RV  
8
9
3
ODT  
2
AR  
1
10  
5
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  
SWITCH LOGIC  
SWITCH POSITION  
L E G E N D  
AR  
MS  
- ANTICIPATOR RESISTOR  
- MONEY SAVER  
- CAPACITOR  
OFF  
CAP  
LOW COOL  
MEDIUM COOL  
HIGH COOL  
HIGH HEAT  
MEDIUM HEAT  
LOW HEAT  
FAN ONLY  
COMPR  
MTR  
OVLD  
- COMPRESSOR  
- FAN MOTOR  
- GROUND LEAD  
- COMBINATION TERMINAL  
- PLASTIC INSULATOR  
- OVERLOAD PROTECTOR  
- REVERSING VALVE  
RV  
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  
IDT  
ODT  
- INDOOR THERMOSTAT  
- OUTDOOR THERMOSTAT  
PART NO.  
619-142-17  
REV.  
01  
58  
MODELS  
EQ08J11-A, EQ08J11-B  
BLUE  
WIRING DIAGRAM  
YELLOW  
COMPRESSOR  
L 1  
L 2  
BLUE  
M S  
"F"  
C
RED  
"F"  
"F"  
S
R
C
2
L
H
SWITCH  
SYSTEM  
HARNESS, COMPR.  
C
R
S
NOTE:  
OPTIONAL  
THERMOSTAT  
CONFIGURATION  
SUPPLY CORD  
RIBBED CONDUCTOR  
BLACK  
WHITE  
CAPACITOR  
RED  
C
RED  
TO CAPACITOR  
BRACKET  
BLUE  
BROWN  
BLACK  
RED  
ORANGE  
FAN  
MOTOR  
HEATER  
SCHEMATIC  
L2  
L1  
IDT  
1
R
OVLD  
L1  
L2  
C
2
COMPR  
S
C
1
2
HERM  
C
3
2
CAP  
HL  
HTR  
TF  
H
L
3
4
R
OVLD  
MS  
MTR  
FAN  
CAP  
C
S
SYS SW  
X = CLOSED  
0 = OPEN  
SWITCH LOGIC  
SWITCH POSITION  
L E G E N D  
CIRCUIT  
HL  
CAP  
- HEATER LIMIT  
- CAPACITOR  
TF - THERMAL FUSE  
1
2
3
4
- PRE-INSULATED CONDUCTOR  
COMPR  
- COMPRESSOR  
1
O
O
X
X
O
O
O
O
O
O
X
X
O
X
X
O
O
X
O
O
O
X
X
O
OFF  
- GROUND LEAD  
- COMBINATION TERMINAL  
MTR  
- FAN MOTOR  
2
3
4
5
6
FAN  
HI COOL  
LOW COOL  
OVLD  
SYS SW  
IDT  
- OVERLOAD PROTECTOR  
- SYSTEM SWITCH  
- PLASTIC INSULATOR  
- INDOOR THERMOSTAT  
- HEATER  
LOW HEAT  
HI HEAT  
PART NO.  
617-581-12  
REV.  
01  
HTR  
59  
MODELS  
WS07A10E-B, WS07A10E-C, WS10A10-A, WS12A10E-A,  
WS09A30E-B, WS12A30E-A, WS15A30-A  
WIRING DIAGRAM  
COMPRESSOR  
BLUE  
SYSTEM SWITCH  
C
OVERLOAD  
PROTECTOR  
PURPLE  
L
2
M S  
L
M
1
H
COMPRESSOR  
WIRE HARNESS  
BLACK  
CAPACITOR  
THERMOSTAT  
RED  
BLACK  
PURPLE  
RED  
c
WHITE (OR YELL0W)  
BROWN  
SUPPLY CORD  
BLUE  
TO GROUNDING  
SCREW  
FAN  
MOTOR  
(115 V)  
(208/230 V)  
NEUTRAL  
SCHEMATIC  
L2  
L1  
IDT  
R
OVLD  
1
2
2
1
L1  
C
COMPR  
S
C
HERM  
C
CAP  
2
HIGH  
H
3
R
OVLD  
MEDIUM  
LOW  
MS  
M
L
MTR  
S
4
5
FAN  
CAP  
C
SYS SW  
X = CLOSED  
0 = OPEN  
SWITCH LOGIC  
SWITCH POSITION  
L E G E N D  
CIRCUIT  
CAP  
COMPR  
- CAPACITOR  
- COMPRESSOR  
1
2
3
4
5
- GROUND LEAD  
- COMBINATION TERMINAL  
O
X
X
X
O
O
O
O
O
X
O
O
O
X
O
O
O
X
O
O
O
X
O
O
O
OFF  
MTR  
- FAN MOTOR  
LOW COOL  
MED COOL  
HI COOL  
FAN ONLY  
OVLD  
SYS SW  
IDT  
- OVERLOAD PROTECTOR  
- SYSTEM SWITCH  
- PLASTIC INSULATOR  
- INDOOR THERMOSTAT  
PART NO.  
617-581-14  
REV.  
00  
60  
MODELS  
WE09A33E-B, WE12A33E-A, WE15A33-A  
WIRING DIAGRAM  
COMPRESSOR  
WHITE  
PURPLE  
PINK  
BLUE  
SYSTEM SWITCH  
OVERLOAD  
PROTECTOR  
M S  
H
4
3
2
1
L 1  
M
5
COMPRESSOR  
WIRE HARNESS  
L
A R  
C 2  
C
3
2
RED  
1
BROWN  
BLACK  
THERMOSTAT  
PURPLE  
FAN  
MOTOR  
RED  
YELLOW  
YELLOW  
BROWN  
SUPPLY  
CORD  
SMOOTH CONDUCTOR  
RIBBED CONDUCTOR  
RED  
ORANGE  
YELLOW  
c
CAPACITOR  
BLUE  
HEATER  
L2  
L1  
SCHEMATIC  
L1  
1
2
MEDIUM  
M
R
OVLD  
HIGH  
LOW  
3
MTR  
S
H
MS  
C
FAN  
CAP  
L
4
5
3
3
2
C
R
1
1
6
C
COMPR  
OVLD  
HERM  
C
S
7
2
4
CAP  
C2  
AR  
8
9
HL  
TF  
HTR  
10  
5
SYS SW  
X = CLOSED  
0 = OPEN  
CIRCUIT  
SWITCH LOGIC  
SWITCH POSITION  
L E G E N D  
AR  
MS  
- ANTICIPATOR RESISTOR  
HTR  
- HEATER  
- MONEY SAVER/ROCKER SWITCH  
- CAPACITOR  
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  
HL  
TF  
- HEATER LIMIT  
- THERMAL FUSE  
OFF  
CAP  
LOW COOL  
MEDIUM COOL  
HIGH COOL  
HIGH HEAT  
MEDIUM HEAT  
LOW HEAT  
FAN ONLY  
COMPR  
MTR  
- COMPRESSOR  
- GROUND LEAD  
- FAN MOTOR  
- COMBINATION TERMINAL  
- PLASTIC INSULATOR  
OVLD  
SYS SW  
IDT  
- OVERLOAD PROTECTOR  
- SYSTEM SWITCH  
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  
- INDOOR THERMOSTAT  
PART NO.  
617-581-15  
REV.  
00  
61  
MODELS  
WY09A33F-A, WY12A33G-A  
WHITE  
BLUE  
WIRING DIAGRAM  
BLUE  
BLUE  
BLACK  
BROWN  
YELLOW  
SYSTEM SWITCH  
M S  
4
3
2
1
L 1  
5
REV VALVE  
BLUE  
BLACK  
L
M
H
A R  
C 2  
C
BLACK  
BLUE  
COMPRESSOR  
FAN MOTOR  
BLACK  
PURPLE  
C
RED  
R
3
2
YELLOW  
BROWN  
1
HARNESS, COMPRESSOR  
MOLDED  
THERMOSTAT  
BLACK  
BLACK  
BLUE  
BLACK  
DEFROST  
T/STAT  
OVERLOAD,  
PROTECTOR  
HEATER  
ORANGE  
ORANGE  
YELLOW  
SMOOTH CONDUCTOR  
RIBBED CONDUCTOR  
SUPPLY CORD  
c
RED  
YELLOW  
BLUE  
CAPACITOR  
TO GROUNDING  
SCREW  
L2  
L1  
SCHEMATIC  
L1  
MS  
C
1
MEDIUM  
M
H
R
2
OVLD  
HIGH  
3
4
MTR  
FAN  
CAP  
C
S
LOW  
L
3
R
IDT  
3
OVLD  
5
3
2
COMPR  
C
2
6
HERM  
C
1
S
CAP  
1
1
7
2
ODT  
HL  
TF  
RV  
HTR  
C2  
8
4
5
9
AR  
10  
X = CLOSED  
0 = OPEN  
CIRCUIT  
SWITCH LOGIC  
SWITCH POSITION  
L E G E N D  
HTR  
HL  
TF  
- HEATER  
MS  
- MONEY SAVER  
- CAPACITOR  
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  
- HEATER LIMIT  
- THERMAL FUSE  
OFF  
CAP  
LOW COOL  
MEDIUM COOL  
HIGH COOL  
HIGH HEAT  
MEDIUM HEAT  
LOW HEAT  
FAN ONLY  
COMPR  
MTR  
- COMPRESSOR  
- FAN MOTOR  
- GROUND LEAD  
- COMBINATION TERMINAL  
- PLASTIC INSULATOR  
OVLD  
- OVERLOAD PROTECTOR  
- REVERSING VALVE  
RV  
IDT  
ODT  
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  
- INDOOR THERMOSTAT  
- OUTDOOR THERMOSTAT  
PART NO.  
REV.  
03  
617-581-02  
62  
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  
RACServMn (7-03)  
Printed in the U.S.A.  

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