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Only for training and service purposes

LGE Internal Use Only

Troubleshooting Guide

9) Troubleshooting CH26, CH27

DC Compressor

Position

PSC Fault

• Compressor

position detect error

• Over current at “IGBT”

• Check the connection of comp wire “U,V,W”

• Malfunction of compressor

• Check the component of “IPM”, detection parts.

• Check the component of “IGBT” .

• Check the components.

Display

code

Title Cause of error Check point & Normal condition

Check Point

• CH 26

1. Check the connection of “U,V,W”

2. Check the insulation of IPM part.

3. Check the compressor. (same with CH21)

• CH 27

1. Check the component of “IGBT”

2. Check the components

(IGBT, R04S, NF1, BD02S)

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