Power unit: DC link overvoltage

What does A30502 mean?

The power unit has detected an overvoltage condition in the DC link during a pulse inhibit state, likely due to an excessively high device supply voltage or an incorrectly dimensioned line reactor. Persistent DC link overvoltage can critically stress the power electronics, significantly reducing the drive's lifespan. If left unresolved, it can lead to catastrophic hardware failure.

Complete Troubleshooting Guide

1. 1

   Measure and verify the device supply voltage (p0210) to ensure it is within the permissible range.

2. 2

   Check the dimensioning and connections of the line reactor, referring to p0210 for guidance.

3. 3

   Consider adding a braking resistor if regenerative energy is frequently causing overvoltage.