P6
Mitsubishi Electric
Compressor Position / Inverter Drive Error
System stops with P6, compressor may not start or may stop quickly
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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.
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Possible Causes
Faulty compressor, Faulty inverter PCB, Loose compressor connector, Incorrect phase detection by inverter
How to Fix / Troubleshooting
Safety first: High-voltage inverter circuits are dangerous. Only qualified technicians should perform detailed diagnostics. Disconnect power at the main disconnect.
Steps:
- Inspect compressor terminals: Check that the compressor connector is fully seated and that terminals are not burnt or loose.
- Check wiring harness: Look for damage or overheating on the wires between the inverter PCB and compressor.
- Technician tests: A technician should perform winding resistance and insulation tests on the compressor and check inverter output waveforms.
- Replace faulty component: If the compressor is defective, it must be replaced and the system recharged. If the compressor is good but the inverter drive is faulty, replace the inverter PCB.
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Repair Difficulty
Professional Required
5/5
Required Part
Compressor or Inverter PCB
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