LG ATNH09GRLE2 Svc Manual page 77

4. Trouble Shooting
6.7 Troubleshooting Outdoor Error
CH 21 (DC Peak / Comp IPM Fault)
How to check the insulation resistance between the compressor and panel
C/BoxSash
How to check the U, V, and W phase resistance
Compressor
terminals
Model GKT141MAC GKT176MAB GJT240MAA GPT442MBA GPT442MAA
U-V 1.040 ±7%
Windings
Resistance V-W 1.040 ±7%
( at 25 )
W-U 1.040 ±7%
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Only for training and service purposes
Compressor
terminals
1.125±7%
1.125±7%
1.125±7%
Comp Pipe
0.628 ±7% 0.438 ±7%
0.628 ±7% 0.438 ±7%
0.628 ±7% 0.438 ±7%
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Insulation
Terminal
Resistance
U-panel 10M
V-panel 10M
W-panel 10M
0.845 ±7%
0.859 ±7%
0.864 ±7%
LGE Internal Use Only