Brake chopper supervision

What does 12 mean?

This fault indicates a problem with the braking system, specifically that no brake resistor is installed, the installed brake resistor is broken (open circuit), or there is an internal failure within the brake chopper itself. The drive cannot dissipate regenerative energy during deceleration without a functioning brake resistor and chopper.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Inspect the cabling between the frequency converter and the brake resistor for any damage or loose connections.

2. 4

   If the brake resistor and cabling are confirmed functional, the internal brake chopper may be faulty. Contact your local distributor.