Multi Variable Air Conditioners Fresh Air Series Indoor Unit
25
8 Troubleshooting
If your air conditioner is not working well, please check the following table first before asking for
service:
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 off
⑤
Error of control loop
The unit stops after running for a
while.
①
There is obstacle in front of condenser
②
Error of control loop
③
Perform cooling when outdoor ambient temperature is higher than 43
℃
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
Air inlet and outlet of IDU are blocked
⑤
Set temperature is too high or refrigerant leaks
⑥
The performance of room temperature sensor gets worse
Poor heating effect
①
The filter is dirty or blocked
②
Door or window is open
③
Set temperature is too low
④
Refrigerant leaks
⑤
Outdoor ambient temperature is lower than -5
℃
⑥
Error of control circuit
Indoor fan doesn’t start
up during heating
①
Position of tube temperature sensor is improper
②
Tube temperature sensor is not inserted well
③
Wiring of tube temperature sensor breaks off
④
Electrical leakage of capacitor
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.
