Multi Variable Air Conditioners Floor and Ceiling Type Indoor Unit
20
7 Table of Error Codes for Indoor Unit
Error
Code
Content
Error
Code
Content
Error
Code
Content
L0 Indoor Unit Error
LA Indoor Units Incompatibility Error d9 Jumper Cap Error
L1 Indoor Fan Protection
LH Low Air Quality Warning
dA Indoor Unit Network Address
Error
L2 E-heater Protection
LC ODU-IDU Incompatibility Error
dH Wired Controller PCB Error
L3 Water Full Protection
d1 Indoor Unit PCB Error
dC Capacity DIP Switch Setting
Error
L4 Wired Controller Power
Supply Error
d3 Ambient Temperature Sensor
Error
dL Outlet Air Temperature
Sensor Error
L5 Freeze protection
d4 Inlet Pipe Temperature Sensor
Error
dE Indoor Unit CO
2
Sensor Error
L7 No Master Indoor Unit
Error
d6 Outlet Pipe Temperature Sensor
Error
db Special Code: Field
Debugging Code
L8
Power Insufficiency
Protection
d7 Humidity Sensor Error
C0 Communication Error
L9 Quantity Of Group Control
Indoor Units Setting Error
d8 Water Temperature Sensor Error AJ Filter Cleaning Reminder
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 up
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
There is obstacle in front of the condenser
②
Control loop is abnormal
③
Set the unit in cooling mode 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 window 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
℃
⑥
Abnormality of control circuit