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.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

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