Multi Variable Air Conditioners Ducted Type Indoor Unit
21
8 Table of Error Codes for Indoor Unit
Indoor Units
Incompatibility Error
Indoor Unit Network
Address Error
ODU-IDU
Incompatibility Error
Wired Controller PCB
Error
Capacity DIP Switch
Setting Error.
Wired Controller Power
Supply Error
Ambient Temperature
Sensor Error
Outlet Air Temperature
Sensor Error
Inlet Pipe Temperature
Sensor Error
Indoor Unit CO
2
Sensor
Error
No Master Indoor Unit
Error
Outlet Pipe
Temperature Sensor
Error
Water Temperature
Sensor Error
Power Insufficiency
Protection
Quantity Of Group
Control Indoor Units
Setting Error
Special Code: Field Debugging Code
9 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.
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.
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)
② Door or window is open.
③ Setting temperature is too low.
④ Refrigerant is insufficient (e.g. refrigerant leakage)
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.
Warning!
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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