LG PAHCMS000 - Page 16

Troubleshooting
- 16 -
Display Title Cause of Error
Outdoor unit related error
4 7 1
Outdoor unit Constant Speed Compressor1 Discharge
Temperature Sensor Fault
Outdoor unit Constant Speed Compressor1 Discharge
Temperature Sensor open or short
4 8 1
Outdoor unit Constant Speed Compressor2 Discharge
Temperature Sensor Fault
Outdoor unit Constant Speed Compressor 2 Discharge
Temperature Sensor open or short
4 9 1
Outdoor unit Faulty IPM Temperature
Sensor
Outdoor unit IPM Temperature Sensor short/open
5 0 1
Omitting connection of R, S, T power of
Outdoor unit
Omitting connection of outdoor unit
5 1 1
Excessive capacity of indoor units Excessive connection of indoor units compared to capacity
of Outdoor Unit
5 2 1
Transmission error : inverter PCB ’ Main
PCB
Failing to receive inverter signal at main PCB of Outdoor
unit
5 3 1
Transmission error : indoor unit ’ main
PCB of Outdoor Unit
Failing to receive indoor unit signal at main PCB of
Outdoor Unit .
5 4 1
Reverse connection of R, S, T power of
Outdoor unit
Reverse connection or omitting connection of R, S, T power
of Outdoor unit
5 7 1
Outdoor unit Communication Error with
Inverter Controller
Outdoor unit Controller part cannot receive inverter control
signals (usually happens after on-boarding)
6 0 1
Inverter PCB EEPROM Error of Outdoor
Unit
Access Error of Inverter PCB of Outdoor unit
6 7 1 Outdoor unit Fan Lock Restriction of Outdoor unit
6 9 1 Constant1 CT Sensor Error of Outdoor Unit Constant1 CT Sensor open or short of Outdoor unit
7 0 1 Constant2 CT Sensor Error of Outdoor Unit Constant2 CT Sensor open or short of Outdoor unit
7 3 1
Instant Over Current(Peak) of Outdoor unit
PFC
Instant Over Current(Peak) of Outdoor unit PFC
7 5 1 Outdoor unit Fan CT Sensor Error Outdoor unit Fan CT Sensor open or short
7 6 1
Outdoor unit Fan DC Link High Voltage
Error
Outdoor unit Fan DC Link High Voltage Error
7 7 1 Outdoor unit Fan Over Current Error Outdoor unit Fan Current is over 5A
7 9 1 Outdoor unit Fan Start Failure Error Outdoor unit Fan First Position Sensing Failure
8 6 1 Outdoor unit Main PCB EEPROM Error
Communication Fail Between Outdoor unit Main MICOM
and EEPROM or omitting EEPROM
8 7 1 Outdoor unit Fan PCB EEPROM Error
Communication Fail Between Outdoor unit Fan MICOM and
EEPROM or omitting EEPROM
[Error Code (Outdoor Unit)]
• This page is about outdoor error code. It can vary depending on outdoor unit. For more information, please
refer to the outdoor unit manual.