E.PE

Parameter Storage Device Fault (Control Circuit Board)

Mitsubishi · FR-E800 Variable Frequency Drive

What does E.PE mean?

A fault has occurred in the inverter's parameter storage (EEPROM failure) on the control circuit board, causing the inverter output to shut off. This often results from an excessively high number of write operations to the EEPROM, leading to degradation. This fault indicates a potential hardware degradation that can affect parameter retention.

Complete Troubleshooting Guide

  1. 1

    Contact your sales representative, as this fault points to a hardware issue with the EEPROM.

  2. 2

    For applications requiring frequent parameter writes (e.g., via communication), consider setting Pr.342 Communication EEPROM write selection to "1" to write parameters to RAM, which reduces EEPROM wear (note: RAM settings are lost on power off).

Source: Mitsubishi Manual