LG Universal System Air Conditioner Service Manual page 98

Troubleshooting Guide
9) Troubleshooting CH26
Display
Title
code
DC Compressor
26
Position
Check Point
1. Check the connection condition of PCB.
2. Check the connection condition of Comp. U,V,W wire.
3. Check the connection condition of CN_IPM(P), CN_IPM(N).
4. Check the comp resistor and insulation resistance .
5. Check the IPM.
6. Check the pressure of refrigerant.
7. Check the Service Valve Open.
98 Universal System Air Conditioner
Cause of error
• Compressor
Starting fail error
Check point & Normal condition
• Check the connection of comp wire "U,V,W"
• Malfunction of compressor
• Check the component of "IPM", detection parts.