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Pc: Current Or Driver Circuit Sensor Malfunction


Safety Note: Before any component is electrically disconnected in the unit, shut off main power. Inverter board DC bus voltage can take up to 15 min to discharge.

Caution: Do not plug or unplug components while electrical power is present, this can damage the equipment and control boards.

Step 1: Check for High Voltage

  • Measure the voltage supplied to the unit using a multimeter to ensure it falls within the specified range. High voltage can lead to sensor malfunctions and other issues in the current or driver circuit.

  • Investigate the cause of high voltage, which may involve issues with the power supply, electrical circuit, or main power connections. Look for loose or damaged wiring that could contribute to voltage irregularities.

  • Ensure proper grounding of the unit and inspect the electrical distribution system for any anomalies.


Step 2: Check the Reactor

  • Inspect the reactor, a component designed to limit electrical current, for any signs of damage or malfunction. Check for loose connections and ensure that the reactor is functioning as intended.

  • If the reactor is found to be defective, consider replacing it with a properly functioning unit.


Step 3: Check the Compressor

  • Examine the compressor for any issues that might affect the current or driver circuit. This includes checking for overheating, damage, or irregularities in operation.

  • Verify the electrical connections to the compressor and ensure they are secure and free from damage.


Step 4: Check the Outdoor Board

  • Inspect the outdoor control board for any visible signs of damage or burnt components.

  • Check the connections on the board, paying special attention to areas related to the current or driver circuit sensor. Look for loose connections, damaged traces, or burnt components.

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