Unit shows F04; often associated with compressor overcurrent on inverter models.

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.

Possible Causes

Seized or partially locked compressor, Shorted compressor windings, Inverter IPM fault, Supply voltage issues

Safety first: High-voltage and refrigerant hazards exist. Only qualified technicians should perform detailed checks.

Step 1 – Power reset: Turn off power for 10 minutes, then restart. If F04 returns immediately, do not keep retrying.
Step 2 – Listen to compressor: Note if the compressor attempts to start (humming) or remains silent.
Step 3 – Technician tests: A technician should measure compressor current, check winding resistance, and test the inverter module. Depending on results, the compressor or inverter PCB may need replacement.

Professional Required 5/5

Compressor or Outdoor Inverter Power PCB

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