Output side earth (ground) fault overcurrent

What does E.GF mean?

This fault occurs when an earth (ground) fault is detected on the inverter's output side, typically in the motor or its connecting cables, specifically during startup. This protective function, active when Pr. 249 is set to '1,' immediately trips the inverter to prevent damage. An unresolved ground fault poses an electrical shock hazard and can severely damage the inverter or motor.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Measure insulation resistance between each conductor of the motor cable and earth at both the inverter and motor ends. Replace any faulty cables.

2. 4

   If the fault persists with the motor disconnected, there may be an internal inverter fault; contact your sales representative.

3. 5

   Ensure Pr. 249 (Earth (ground) fault detection at start) is set to '1' for active protection during startup.