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 Insufciency
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 re, 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 lter 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 lter 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