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E57

Refrigerant Leak / Shortage

Mitsubishi Electric · FR-D700 Inverter

Hva betyr E57 ?

This indicates a refrigerant leak or shortage of refrigerant (specific to FDCVA151-251 models), leading to insufficient cooling or heating performance. A low refrigerant charge can cause compressor overheating and damage.

Vanlige årsaker

  • Insufficient refrigerant charge in the system leading to low operating pressures.
  • Significant leak in the refrigerant lines or components.
  • Blockage in the liquid or suction line restricting refrigerant flow.

Reparasjonssteg & Sjekkliste

Klikk på steg for å spore fremgangen.

  1. 1

    Perform a thorough leak test on the entire refrigerant circuit using an electronic leak detector, focusing on all joints and connections.

  2. 2

    Recover any remaining refrigerant and evacuate the system to a deep vacuum (e.g., 500 microns) for at least 30 minutes.

  3. 3

    Charge the system with the specified amount of new refrigerant by weight, as per the unit's nameplate.

  4. 4

    Inspect all flare connections and brazed joints for signs of oil leakage, which can indicate a leak point.

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Verifisert teknisk data. Sist oppdatert: March 2026

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Kilde: Mitsubishi Electric FR-D700 Inverter