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U1: Compressor Phase Current Detection Circuit Malfunction.


  1. Verify High Voltage:

    • Check the power supply for high voltage irregularities.

    • Ensure the voltage supplied to the compressor is within the specified range.

  2. Examine the Compressor:

    • Inspect the compressor for any visible damage.

    • Verify the wiring and connections to the compressor.

    • Ensure the compressor is functioning correctly.

  3. Check the Outdoor Board:

    • Inspect the outdoor board for signs of malfunction related to the compressor phase current detection circuit.

    • Confirm proper wiring and connections on the outdoor board.

    • Check for any visible damage or anomalies on the outdoor board.

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