Low ESP Fan Coil Indoor Unit
23
L5
Anti-Frosting
Protection
d4
Inlet Pipe Temperature
Sensor Error
dL
Outlet Air Temperature
Sensor Error
L7
No Master Indoor Unit
Error
d6
Outlet Pipe Temperature
Sensor Error
dE
Indoor Unit CO
2
Sensor
Error
L8
Power Insufficiency
Protection
d7
Humidity Sensor Error
db
Special Code:
Field Debugging Code
L9
Quantity Of Group Control Indoor Units Setting Error
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
Defect of main PC-board.
The unit stops after running
for a while.
①
The inlet or outlet of ODU or IDU are blocked by obstacle.
Poor cooling effect
①
The filter is dirty.
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.
⑥
Refrigerant is insufficient (e.g. refrigerant leakage)
Poor heating effect
①
The filter is dirty.
②
Door or window is open.
③
Setting temperature is too low.
④
Refrigerant is insufficient (e.g. refrigerant leakage)
Indoor fan doesn’t start
up during heating
①
At starting, the IDU fan could not operate till the heat exchange become
hot, for preventing delivering the cool air.
②
At defrosting, the IDU fan stopped due to system switch to cooling mode.
for preventing delivering the cool air, and resume operating after
defrosting.
Notes:
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.
