25
7.3.3 Only outdoor fan motor dos not run.
7.3.4 Compressor does not run.
7.4 Air conditioner operates, but abnormalities are observed
7.4.1 Poor shifting between cooling and heating.
(Inapplicable for cooling-only type)
Check the fan rotation
Check if foreign matter is in
the fan cover.
Check if fan motor is broken
or foreign matter in bearing.
Measure the resistance of motor coil.
Check the capacitor of the fan motor.
Ok
Ok
Not rotate
Check compressor capacitor.
Measure the resistance of compressor coil.
Measure the resistance of power relay coil.
Measure if power supply voltage is too low.
Overload protector activates.
The temperature of compressor is too high.
Refrigerant is not enough.
Fill it.
Rotor may be blocked.
Yes
No
Remote controller may be defective.
Measure the resistance of 4-way reversing valve coil.
Cooling
→
Heating
Measure the voltage between terminal No.5 and No.2
on the outdoor terminal block (220-240V) (Adding 6 W
loading in measuring)
Four-way reversing
valve is defective.
PCB Ass’ y of indoor unit is defective.
OK
No voltage indication
