Multi Variable Air Conditioners Compact Cassette Type Indoor Unit
22
8 Troubleshooting
The air conditioner is not expected to be serviced by users. Incorrect repair may cause electric
shock or fire, so please contact an authorized service center for professional service. The following
checks prior to contact may save your time and money.
Phenomenon
Troubleshooting
The unit can’t start.
①
Power supply is not connected.
②
Circuit breaker tripping caused by leakage of electricity.
③
Input voltage is too low.
④
Operation button is closed.
⑤
Control loop is abnormal.
The unit stops after
running for a while.
①
The inlet or outlet of ODU or IDU are blocked by obstacle.
②
Control loop is abnormal.
③
Set the unit in cooling mode when outdoor ambient temperature is higher than
43°C.
Poor cooling effect.
①
The filter is dirty or blocked.
②
Too heavy heat load of room (e.g. too many people).
③
Door or windows is open.
④
Inlet and outlet of IDU are blocked.
⑤
Setting temperature is too high or refrigerant leaks.
⑥
The performance of room temperature sensor is getting worse.
Poor heating effect.
①
The filter is dirty or blocked.
②
Door or window is open.
③
Setting temperature is too low.
④
Refrigerant leakage.
⑤
Outdoor ambient temperature is lower than -5°C.
⑥
Abnormality of control circuit.
Indoor fan doesn’t
start up during
heating.
①
Placing position of tube temperature sensor head is not suitable.
②
Tube temperature sensor head isn't inserted well.
③
Wiring of tube temperature sensor head is broken.
④
Capacitor is leaking electricity.
NOTE!
If air conditioner still fails to work normally after checking and handling as described above, please
stop using it immediately and contact local service center for assistance.
