LG AHNW166T0 - Page 72

Test Run
72
Error No. Error Type Main Reasons
Outdoor unit related error (CH)
461
Inverter compressor suction pipe
temperature sensor defect
Inverter compressor suction temperature
sensor disconnection or short circuit
491
Defective IPM Temperature
Sensor
Disconnection or short circuit on IPM
temperature sensor of the outdoor unit
521
Communication error : inverter
PCB → Main PCB
Failing to receive inverter signal at main
PCB of Outdoor Unit
531
Communication error(indoor unit →
outdoor unit main PCB)
Outdoor unit does not receive signal from
indoor unit
571
Communication error : inverter
PCB → Main PCB
Restriction of Outdoor Unit (Inverter PCB)
601
Inverter PCB EEPROM error Inverter PCB EEPROM error
621
Excessive rise of inverter heatsink
temperature
Inverter PCB heat generation, causing the
rise of heatsink temperature
671
Outdoor Unit Fan Lock Restriction of Outdoor Unit Fan
731
Overcurrent (Peak) detected at in-
verter input
Error by overcurrent detection at inverter
input
861
Outdoor Unit Main PCB EEPROM
Error
Communication Fail Between Outdoor Unit
Main MICOM and EEPROM or omitting
EEPROM
881
PFC PCB EEPROM Error
Communication Fail Between Outdoor Unit
PFC MICOM and EEPROM or omitting
EEPROM
113
1
Outdoor Unit Liquid pipe
Temperature Sensor Error
Liquid pipe temperature sensor of outdoor
unit is open or short
115
1
Outdoor Unit Subcooling Outlet
Temperature Sensor Error
Outdoor Unit Subcooling Outlet Tempera-
ture Sensor open or short
151
1
Failure of operation mode
conversion at Outdoor Unit
Pressure unbalance between outdoor units