HF damping module: Damping voltage too high

What does 237502 mean?

The damping voltage within the HF damping module has exceeded its alarm threshold. This can be caused by a motor harmonic with high amplitude coinciding with the output filter's resonance frequency, or by the current controller excessively exciting the output filter's resonance. If the damping voltage continues to rise to an unacceptably high level, it will trigger fault F37002 (likely 237002).

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Consider using an alternative motor if the current motor characteristics consistently trigger this alarm due to harmonics.

2. 4

   Monitor the damping voltage actual value (r5171) to observe the effectiveness of troubleshooting steps.