E.5

CPU fault

Mitsubishi Electric · FR E700

What does E.5 mean?

This is a CPU fault that stops the inverter output when a communication fault occurs within the built-in CPU. Such an error indicates a critical internal processing issue, which can be influenced by external factors like electrical noise. Inverter operation is halted to prevent further damage or incorrect control.

Complete Troubleshooting Guide

  1. 1

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

  2. 2

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

Source: Mitsubishi Electric Manual