Midea · Air Conditioner error code

PC 04Inverter compressor drive error

Cross-checked High-voltage / caution

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OnCall Tech is a reference tool for trained technicians and can make mistakes. Always disconnect power and confirm with the manufacturer's documentation before you work.

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Mini-split outdoor inverter board: what is safe to check

Mini-split outdoor boards rectify line voltage to a high DC bus and drive the compressor and fan. Field checks are input power, communication, error codes and compressor winding balance. Board DC bus voltage is dangerous after shutdown.

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AC/heat pump outdoor fan not spinning

On conventional units the usual causes are a failed fan capacitor, a seized motor or a contactor problem. On inverter mini-splits the fan is driven by the board and usually posts a fan error code.

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