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.
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