E55

Compressor Under Dome Thermistor Disconnected

Mitsubishi Electric · Mitsubishi FR-D700 Inverter

What does E55 mean?

The thermistor located under the compressor dome is disconnected, which will prevent critical temperature monitoring of the compressor shell. This can lead to undetected compressor overheating and failure.

Additional Steps

Steps 1–2 are listed in Priority Fix.

  1. 3

    Ensure the thermistor is securely connected and making proper thermal contact with the compressor dome.

Source: Mitsubishi FR-D700 Inverter
Open Manual (Page 5)