E45

Transmission Error / Loose Connection (Cal)

Mitsubishi Electric · Mitsubishi FR-D700 Inverter

What does E45 mean?

A transmission error has occurred between the inverter and the outdoor unit PCB, possibly due to a loose connection at the 'Cal' terminal. This disrupts critical communication and control signals.

Additional Steps

Steps 1–2 are listed in Priority Fix.

  1. 3

    Check for signs of damage or corrosion on the communication terminals themselves.

Source: Mitsubishi FR-D700 Inverter
Open Manual (Page 4)