P4
Camry
Inverter Compressor Drive Fault / Phase Loss
P4 displayed; indoor unit may run fan only, with no cooling or heating
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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
Open circuit in compressor wiring harness on Camry unit, Faulty inverter IPM output stage, Loose connector between PCB and compressor, Compressor internal open circuit
How to Fix / Troubleshooting
Safety first: Isolate power before accessing outdoor wiring.
- 1. Inspect compressor harness: Check the multi-core cable from the outdoor PCB to the compressor for damage or loose connectors.
- 2. Tighten terminals: Ensure all compressor terminals are tight and properly insulated.
- 3. Continuity test: A technician should verify continuity of each compressor phase from PCB to compressor.
- 4. IPM test: If wiring and compressor are good, the inverter output stage may be faulty and the PCB should be replaced.
- 5. Do not bypass: Never bypass inverter protections; this can cause catastrophic failure.
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Repair Difficulty
Professional Required
5/5
Required Part
Outdoor Inverter PCB (Camry Condenser Unit)
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