Brake chopper overcurrent

What does F4.1 mean?

An overcurrent condition has been detected in the brake chopper circuit. This is typically caused by excessive regenerative power during deceleration, a short circuit in the braking resistor circuit, or an incorrectly sized braking resistor. Failure to resolve risks damage to the brake chopper or resistor.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Verify that the technical data (resistance value, power rating) of the braking resistor matches the drive's requirements.