-EEF

EEPROM Fault

Schneider Electric · Altivar Machine ATV340 Programming

What does -EEF mean?

This fault indicates an error within the drive controller's internal EEPROM memory, which stores configuration parameters and operational data. This can lead to incorrect settings being loaded or data corruption, preventing proper drive operation. A corrupted EEPROM can cause unpredictable behavior or prevent the drive from starting.

Complete Troubleshooting Guide

  1. 1

    Completely remove all power from the drive controller, wait for the display to extinguish (ensuring a full discharge), and then reapply power to perform a hard reset.

  2. 2

    If the fault reoccurs immediately after a power cycle, the EEPROM memory may be permanently damaged, and the drive controller will need to be replaced.

Source: Schneider Electric Manual