Power unit: Braking chopper overcurrent

What does F30055 mean?

An excessive current has been detected flowing through the braking chopper circuit. This is typically caused by a short circuit within the braking resistor itself or if the external braking resistor is undersized for the application's regenerative energy requirements. An overcurrent condition can quickly damage the braking chopper or connected components.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Check the wiring connections to the braking chopper and resistor for proper contact and insulation.