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E42

Compressor Abnormally High Current

Mitsubishi Electric · R410A Systems

Hva betyr E42 ?

The system has detected an abnormally high current draw by the compressor. This indicates an overload condition, potentially due to mechanical issues, excessively high head pressure, or an electrical fault within the compressor motor.

Vanlige årsaker

  • Compressor drawing abnormally high current.
  • Compressor internal winding fault.
  • Mechanical issue within the compressor.
  • Low voltage supply to the compressor.
  • Overload condition on the compressor circuit.

Reparasjonssteg & Sjekkliste

Klikk på steg for å spore fremgangen.

  1. 1

    Measure compressor running current on all three phases using a clamp meter — compare to the motor nameplate FLA.

  2. 2

    Measure discharge and suction pressures to check for high head pressure or liquid slugging.

  3. 3

    Measure winding resistance of the compressor motor phases (U-V, V-W, U-W) and to ground using an ohmmeter.

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Verifisert teknisk data. Sist oppdatert: March 2026

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Kilde: Mitsubishi Electric R410A Systems