LG A2UW166FA1 - Page 204

204 Multi type Air Conditioner
Troubleshooting Guide
9) Troubleshooting CH26, CH27
E
C
B
E
C
B
E
C
B
26
27
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)