Indoor unit displays P0; compressor may not start or may run at limited capacity.

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

Low or high supply voltage, Faulty PFC (power factor correction) circuit on PCB, Loose power connections, Failing main capacitor on outdoor PCB

Safety: Turn off power and verify with a meter before touching any components.

Step 1 – Check supply voltage: Have a qualified person measure line voltage at the outdoor unit. It must be within the range specified on the Senville nameplate.
Step 2 – Inspect terminals: Tighten all line and neutral connections at the outdoor terminal block.
Step 3 – Visual PCB check: Look for bulging capacitors or burnt components in the DC bus area.
Step 4 – Professional repair: If P0 persists with correct supply voltage, the outdoor PCB likely needs replacement.

Professional Required 5/5

Outdoor Main Control Board (PCB)

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