Kaisai ICE Series, Service Manual, Page: 154 / 168

 Troubleshooting 
8.4 Indoor AC Fan Motor Check
1) Power off and disconnect fan motor power cord from PCB. Measure the resistance value of each winding by using
the multi-meter. The normal value show as follows .
Model
YKFG-13-4-38L
YKFG-13-4-38L-4
YKFG-15-4-28-1 YKFG-20-4-10L YKFG-20-4-5-11
Brand Welling Welling Welling Welling
Black – Red Main 345
Ω
75
Ω
269
Ω
388
Ω
White – Black AUX 348
Ω
150
Ω
224
Ω
360
Ω
Model YKFG-20-4-5-19 YKFG-25-4-6-14
YKFG-28-4-3-7
YKFG-28-4-3-14
YKFG-28-4-6-5
Brand Welling Welling Welling Welling
Black – Red Main 444
Ω
287
Ω
231
Ω
183.6
Ω
White – Black AUX 470
Ω
409
Ω
414
Ω
206
Ω
Model YKFG-45-4-13
YKFG-45-4-22
YKFG-45-4-22-13
YKFG-60-4-2-6 YKFG-60-4-1
Brand Dongfang Welling Welling Welling
Black – Red Main 125.2
Ω
168
Ω
96
Ω
68
Ω
White – Black AUX 83.8
Ω
141
Ω
96
Ω
53
Ω
Model YKFG-20-4-5-21 YKFG-20-4-123 YKFG-28-4-46
Brand Welling Welling Welling
Black – Red Main 450
Ω
267
Ω
210
Ω
White – Black AUX 442
Ω
266
Ω
288
Ω
2) Power on and set the unit running in fan mode at high fan speed. After running for 15 seconds, measure the voltage
of pin1 and pin2. If the value of the voltage is less than 100V(208~240V power supply) or 50V (115V power supply),
the PCB must has problems and need to be replaced.