LG UU85W U74 - LG Standard Inverter Wiring Diagrams

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Part 4 Trouble Shooting
Purpose
Judgment of the fault of the
compressor.
Items for checking
1. Measurement of insulation resistance
between the compressor and panel.
2. Measurement of phase resistance.
3. Wiring Check.
ƅ How to check the compressor wiring error
WU
U
V
W
V
WWWUUU
U
UU
V
VV
W
WW
[Compressor] [Inverter PCB]
V
VV
1. Check Inv. PCB U,V,W connector connection condition
2. Check wire disconnection and wiring
3. Check compressor terminal connection condition(bad contact)
Reassemble if abnormality found
※ U(Red), V(Blue), W(Yellow)