LG ARUV Series Service Manual page 270

Troubleshooting Guide
Error
Error Type
No.
54 (Main)
Wrong connection of 3Ø
110 (Sub1)
power supply cable
141 (Sub2) (Reverse direction / missing
a phase)
155 (Sub3)
Error diagnosis and countermeasure flow chart
Is connection and phase
order of power cables to main /
sub outdoor unit correct?*
Yes
Is connection and phase
order of power distribution
panel correct?**
Yes
Is CH 54 occurred again
after reset MAIN
circuit breaker?
Yes
Is 3Ø Fuse normal?
[refer electric
component part]
Yes
Is noise filter
normal?
[refer electric
component part]
Yes
Replace inverter compressor
PCB(CH54),
SUB PCB(CH110,141,155)
* Check power cable connection state,
phase (R-S-T) order, power supply state
in control box of product
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Error Point
Wrong connection of 3Ø
power supply cable
(Reverse direction / miss-
ing a phase)
No
Connect correctly
No
Connect power cables in
distribution panel correctly
No
End
No
Replace Fuse
Check the diode of inverter
fan PCB and in case of fault
replace inverter fan PCB
[refer electric component part]
No
Replace NOISE FILTER
** Check power cable connection state, phase order, power
- 270 -
1. Defect of inverter PCB
2. No power of R, S, T supplied
3. Wrong connection of R, S, T cables
4. Main fuse failure
supply state in distribution panel
Main Reasons
LGE Internal Use Only