Unit displays P0; compressor may not start or may shut down quickly.

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

Abnormal mains voltage, Faulty PFC circuit on outdoor PCB, Loose power connections, Defective DC bus capacitors

Safety first: High‑voltage DC is present on the inverter board. Only qualified technicians should measure or service it.

Step 1 – Check supply voltage: If possible, have an electrician verify that line voltage is within the specified range.
Step 2 – Inspect terminals: With power OFF, check that all power terminals in the outdoor unit are tight and free of corrosion.
Step 3 – Technician repair: Persistent P0 requires professional diagnosis of the PFC and DC bus circuits and likely PCB replacement.

Professional Required 5/5

Outdoor Inverter PCB

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