Earth fault

What does 3 mean?

The drive's current measurement system has detected that the sum of the motor phase currents is not zero, indicating a leakage current to earth. This is typically a result of insulation malfunction within the motor windings or the motor cables. An unresolved earth fault poses a significant electrical safety hazard and can cause severe damage to both the motor and the drive.

Complete Troubleshooting Guide

1. 1

   Thoroughly inspect the motor cables for any visible damage, chafing, or signs of insulation breakdown.

2. 2

   Perform an insulation resistance test (megger test) on the motor windings and cables to ground, expecting values typically greater than 1 MΩ.