LG General Wall Mounted-Inverter Type - Manual (Page 62)

62 Room Air Conditioner
Part 4 Trouble Shooting
7) 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.
Error
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)