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Copyright ©2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Self-diagnosis function
Display
Error item
Root cause of error
5
7
1
Communication error between outside
unit inverter controller
Failing to receive inverter contoroller signal at Outdoor
Unit controller
6
0
1
Outside unit inverter PCB EEPROM error
Outside unit inverter PCB EEPROM ACCESS error
6
2
1
Outside unit inverter IGBT over-rise error
Outside unit inverter IGBT when the temperature rises
above 110 ℃
6
5
1
Outside unit inverter IGBT temperature
sensor error
Outside unit inverter IGBT temperature sensor disconnec-
tion or short circuit
7
0
1
Outside unit static speed CT sensor error
Outside unit static speed CT sensor disconnection or short
circuit
7
1
1
PFC CT Sensor Error of Outdoor Unit
Outdoor Unit PFC CT Sensor open or short
7
3
1
Outside unit inverter PCB input instant
over-current (Peak)
Outside unit inverter PCB input instant over-current (Peak)
exceeded
7
4
1
Outside unit inverter PCB phase imbal-
ance
When the outside unit inverter PCB input current is differ-
ent
8
6
1
Outside unit PCB EEPROM error
Communication error between Outside unit MICOM and
EEPROM or EEPROM missing
8
8
1
PFC PCB EEPROM error
Communication error between Outside unit PFC and EEP-
ROM or EEPROM missing
1
1
3
1
Outside unit liquid pipe temperature sen-
sor error
Outside unit liquid pipe temperature sensor disconnection
or short circuit
1
5
1
1
Outside unit 4 way valve switch failure
Outside unit 4 way valve switch error
1
8
0
1
Plate type heat exchanger freeze preven-
tion
Plate type heat exchanger freeze prevention error
1
8
1
1
Water temperature sensor error
Water temperature sensor open/short
1
8
2
1
Communication error between MICOMs
Communication error between main MICOM and sub
MICOM
Outside unit
■
Refer to the troubleshooting guide of service technical manual for each error.
Summary of Contents for ARWN038GA2
Page 81: ...P NO MFL67101202 APRIL 2013 ...