21
Measure coil resistance of power
relay (PR).
SOME PART OF AIR CONDITIONER DOES NOT OPERATE
1) ONLY INDOOR FAN DOES NOT RUN
2) ONLY OUTDOOR FAN DOES NOT RUN
3) ONLY COMPRESSOR MOTOR DOES NOT RUN
DEFECTIVE
DEFECTIVE
Fan cannot be
turned
OK
Check fan rotation. Turn fan gently
once or twice by hand.
Remove foreign
matter or repair.
Repair or replace.
Check fan casing for
foreign matter on inside.
Fan motor burnout or
foreing matter in bearing.
Check fan motor capacitor.
Replace.
Measure resistance of fan motor
winding.
Replace fan motor.
DEFECTIVE
DEFECTIVE
OK
Check fan motor capacitor.
Replace.
Measure resistance of fan motor
winding.
Replace fan motor.
Fan cannot be
turned
Check fan rotation. Turn fan gently
once or twice by hand.
Remove foreign
matter or repair.
Repair or replace.
Check fan casing for
foreign matter on inside.
Fan motor burnout or
foreing matter in bearing.
OK
OK
OK
Measure resistance of compres-
sor motor winding.
Check overload relay (OLR). It his
tripped.
Is temperature of compressor
abnormally high?
Refrigerant gas shortage.
Check compressor. There is a
possibility of locked rotor.
Charge refrigerant gas.
Replace the compressor.
Check compressor motor capaci-
tor.
OK
YES
YES
YES
NO
YES
Defrost controller (PCB2 / POW - C
96) is defective (AU 310 HL).
E
