Power unit: Monitoring U_ce

What does F30022 mean?

The monitoring of the collector-emitter voltage (U_ce) in the power unit's semiconductors has detected an abnormal condition. This often indicates a short circuit at the power unit output, a defective IGBT, a problem with the IGBT gating module's power supply (24V), or an interrupted fiber-optic cable. This is a critical fault that can lead to immediate and severe damage to the power unit's IGBTs if not addressed.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Check the power cable connections at the drive output for any short-circuits between phases or to ground.

2. 4

   If suspected, identify and replace any defective semiconductor (IGBT) within the power unit.