Multi Variable Air Conditioners Duct Type Indoor Unit
19
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
d8
Water Temperature Sensor
Error
L1
Indoor Fan Protection
LH
Low Air Quanlity Warning
d9
Jumper Cap Error
L2
E-heater Protection
LC
Outdoor-Indoor Incompatibility
Error
dA
Indoor Unit
Hardware Address Error
L3
Water Full Protection
d1
Indoor Unit PC-Board Error
dH
Wired Controller PC-Board
Error
L4
Wired Controller Power
Supply Error
d3
Ambient Temperature Sensor
Error
dC
Capacity DIP Switch Setting
Error.
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.
