E.7

CPU fault

Mitsubishi Electric · FR E700

What does E.7 mean?

This is a CPU fault that stops the inverter output when a communication fault occurs within the built-in CPU. Specific causes include excessive electrical noise or a short circuit between the PC and SD terminals. This critical internal error prevents safe operation.

Complete Troubleshooting Guide

  1. 1

    Implement measures to reduce or eliminate excessive electrical noise in the vicinity of the inverter.

  2. 2

    Check the connection between the PC and SD terminals for any short circuits and correct them.

  3. 3

    If the issue persists, contact your sales representative for further diagnosis.

Source: Mitsubishi Electric Manual