Keeprite inverter-type air conditioner shows P0 and will not start or runs at reduced capacity.

Safety first: Inverter systems contain high DC voltages. Turn off power at the breaker and disconnect and do not touch inverter components unless qualified.

• Step 1 – Verify supply voltage: Have a qualified person measure line voltage at the disconnect to ensure it matches the unit nameplate (e.g., 208/230V).
• Step 2 – Inspect connections: With power off, tighten all line and ground connections in the outdoor unit and disconnect.
• Step 3 – Surge damage check: Look for burnt components on the inverter board. If present, the inverter module must be replaced.
• Step 4 – Professional service: P0 faults generally require a Keeprite-trained technician to diagnose and replace the inverter or main control board.