LG ARUV Series Service Manual page 241

Display
4 0 Current sensor of inverter compressor
4 1 Discharge temperature sensor of
inverter compressor
4 2 Low pressure sensor of main outdoor
unit
4 3 High pressure sensor of main outdoor
unit
4 4
Air temperature sensor of main out-
door unit
4 5 Temperature sensor of front-side heat
exchanger
4 6 Suction temperature sensor of main
outdoor unit
Discharge temperature sensor of the
4 7
constant speed compressor of main
outdoor unit
4 8
Temperature sensor of rear-side heat
exchanger
Excessive capacity of indoor units
5 1
Transmission error : inverter PCB
5 2
main PCB
Transmission error : indoor unit
5 3
main PCB of outdoor unit
Reverse connection of R, S, T power
5 4
of main outdoor unit
Transmission error : main PCB
5 7
inverter PCB
6 2
Overheat of inverter heatsink
6 5 Temperature sensor of fan
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Title
Current sensor of inverter compressor is open or short
Discharge temperature sensor of inverter compressor is
open or short
Low pressure sensor of main outdoor unit is open or short
High pressure sensor of main outdoor unit is open or short
Air temperature sensor of main outdoor unit is open or short
Temperature sensor of front-side heat exchanger is open or
short
Suction temperature sensor of main outdoor unit is open or
short
Discharge temperature sensor of the constant speed com-
pressor of main outdoor unit is open or short
Temperature sensor of rear-side heat exchanger is open or
short
Excessive connection of indoor units compared to capacity of
outdoor unit
Failing to receive inverter signal at main PCB
Failing to receive indoor unit signal at main PCB of outdoor
unit
Reverse connection or omitting connection of R, S, T power
of main outdoor unit
Failing to receive main PCB signal at inverter PCB
Overheat of inverter heatsink
Temperature sensor of fan is open or short
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Self-diagnosis function
Cause of Error
LGE Internal Use Only