LG ARUN Series Service Manual page 74

Self-diagnosis function
Display
Omitting connection of R, S, T
1
power of Master Outdoor unit
5 0
Omitting connection of R, S, T
2
power of Slave outdoor unit
Excessive capacity of indoor units
5 1 1
Communication error : inverter
1
PCB ¡ Main PCB
5 2
Communication error : inverter
2
PCB ¡ Main PCB
Communication error : indoor unit
5 3 1
¡ main PCB of outdoor unit
Reverse connection of R, S, T
1
power of Master Outdoor unit
5 4
Reverse connection of R, S, T
2
power of Slave outdoor unit
Mixing Installation of Sub Outdoor
5 9 1
Unit
Inverter PCB EEPROM Error of
1
Master Outdoor Unit
6 0
Inverter PCB EEPROM Error of
2
Slave Unit
1 Master Outdoor Unit Fan Lock
6 7
2 Slave Outdoor Unit Fan Lock
Constant CT Sensor Error of
1
Master Outdoor Unit
7 0
Constant CT Sensor Error of
2
Slave Outdoor Unit
PFC CT Sensor Error of Master
1
Outdoor Unit
7 1
PFC CT Sensor Error of Slave
2
Outdoor Unit
Instant Over Current(Peak) of
1
Master Outdoor Unit PFC
7 3
Instant Over Current(Peak) of
2
Slave Outdoor Unit PFC
Master Outdoor Unit 3 Phase
1
Power unbalance
7 4
Slave Outdoor Unit 3 Phase
2
Power unbalance
Master Outdoor Unit Fan CT
1
Sensor Error
7 5
Slave Outdoor Unit Fan CT
2
Sensor Error
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Only for training and service purposes
Title
Omitting connection of Master outdoor unit
Omitting connection of Slave outdoor unit
Excessive connection of indoor units compared to
capacity of outdoor unit
Failing to receive inverter signal at main PCB of Master
Outdoor Unit
Failing to receive inverter signal at main PCB of Slave
Outdoor Unit
Failing to receive indoor unit signal at main PCB of out-
door Unit.
Reverse connection or omitting connection of R, S, T
power of Master outdoor unit
Reverse connection or omitting connection of R, S, T
power of Slave outdoor unit
Mixing Installation of Old Sub outdoor unit and New
Slave Outdoor Unit
Access Error of Inverter PCB of Master Outdoor Unit
Access Error of Inverter PCB of Slave Outdoor Unit
Restriction of Master Outdoor Unit
Restriction of Slave Outdoor Unit
Constant CT Sensor open or short of Master Outdoor
Unit
Constant CT Sensor open or short of Slave Outdoor
Unit
Master Outdoor Unit PFC CT Sensor open or short
Slave Outdoor Unit PFC CT Sensor open or short
Instant Over Current(Peak) of Master Outdoor Unit
PFC
Instant Over Current(Peak) of Slave Outdoor Unit PFC
Master Outdoor Unit R-T Phase Difference is over 5A
Slave Outdoor Unit R-T Phase Difference is over 5A
Master Outdoor Unit Fan CT Sensor open or short
Slave Outdoor Unit Fan CT Sensor open or short
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Cause of Error
LGE Internal Use Only