LG multi V PLUS

Service Manual 279
Self-diagnosis function
Trouble shooting Flow
Fault diagnosis and Trouble shooting guide
54
110
141
Error Item
Error
Display No.
Major Error Occurrence CauseMeaning
54: 3-phase wrong wiring
of main outdoor unit
110: 3-phase wrong
wiring of Sub1
outdoor unit
141: 3-phase wrong
wiring of Sub2
outdoor unit
3-phase wrong wiring
of outdoor unit
(Reverse
phase/omission of
phase)
• Abnormal inverter PCB
• No connection of R, S, T power
• Changed R, S, T connection order
No
Check or reconnect power lines
Yes
Yes
No
Check or replace fuse
Is R.S.T power connection
status normal?
Is fuse normal?
No
Check or replace the main PCB
Yes
Is operation status normal?
Check or replace the inverter PCB.