Self-Diagnosis Function; Error Indicator; Error Display - LG ARNU07GCEA4 Svc Manual

7. Self-diagnosis function

Error Indicator

• This function indicates types of failure in self-diagnosis and occurrence of failure for air condition.
• Error mark is displayed on display window of indoor units and wired remote controller, and 7-segment LED of
outdoor unit control board as shown in the table.
• If more than two troubles occur simultaneously, lower number of error code is first displayed.
• After error occurrence, if error is released, error LED is also released simultaneously.

Error Display

- 1st,2nd,3rd LED of 7-segment indicates error number, 4th LED indicates unit number. Indicates unit number.
(* = 1:Master, 2 : Slave 1, 3 : Slave 2)
Ex) 211 : No.21 error of master unit
213 : No.21 error of slave2
1051 : No.105 error of master unit
h Refer to the DX-Venitilation manual for DX-Venitilation error code
Display
0 1 - Air temperature sensor of indoor unit
0 2 - Inlet pipe temperature sensor of indoor unit
Communication error : wired remote controller ↔
0 3 -
indoor unit
0 4 - Drain pump
Communication error : Indoor communication
0 5 -
PCB ↔ indoor unit
0 6 - Outlet pipe temperature sensor of indoor unit
0 9 - Indoor EEPROM Error
1 0 - Poor fan motor operation
2 3 0 Refrigerant leakage sensing error
Communication defect in indoor communication
2 3 7
PCB ↔ outdoor communication PCB
Communication error in outdoor communication
2 3 8
PCB ↔ outdoor unit
Copyright ©2014 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Title
- 14 -
Error Compressor
Unit(1:Master, 2:Slave 1, 3:Slave 2)
Error number
Cause of Error
Air temperature sensor of indoor unit is open or short
Inlet pipe temperature sensor of indoor unit is open or short
Failing to receive wired remote controller signal in indoor unit PCB
Malfunction of drain pump
Indoor Unit PCB did not receive signal from Indoor
communication PCB for over 3 minutes continuously
Outlet pipe temperature sensor of indoor unit is open or short
In case when the serial number marked on EEPROM of
Indoor unit is 0 or FFFFFF
Disconnecting the fan motor connector / Failure of indoor
fan motor lock
Refrigerant leakage sensing error and sensor defect error
Indoor communication PCB did not receive signal from outdoor
communication PCB for over 3 minutes continuously
Outdoor communication PCB did not receive communication sig-
nal from outdoor unit for over 3 minutes continuously
(repetition)
LGE Internal Use Only