P4
Chigo
Inverter Compressor Drive Fault / Phase Error
Indoor unit displays P4 and the unit may not start or may shut down quickly.
Advertisements
Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
Advertisements
Possible Causes
Faulty inverter drive circuit on Chigo outdoor PCB, Loose compressor terminal connections, Shorted compressor winding, Incorrect wiring after compressor replacement
How to Fix / Troubleshooting
Safety first: High-voltage inverter circuits require professional handling.
- Step 1 – Visual inspection: With power off, inspect compressor terminals and wiring for looseness or burn marks.
- Step 2 – Professional testing: A technician should test compressor windings and the inverter output waveforms.
- Step 3 – Replace faulty parts: Replace the outdoor main PCB or compressor as indicated by diagnostic tests.
Advertisements
Repair Difficulty
Professional Required
5/5
Advertisements