Brake Chopper Supervision Fault

What does 12 mean?

This fault indicates a problem with the brake chopper system. Possible causes include the absence of a brake resistor, a broken or open-circuited brake resistor, or a failure of the brake chopper circuitry itself.

• Brake chopper resistor disconnected or faulty.
• Brake chopper output short-circuited.
• DC bus voltage too high during braking, exceeding chopper limits (P0400).

Click steps to track your progress.

1. 1

   Verify that a brake resistor is correctly installed and connected to the drive terminals.

2. 2

   Measure the resistance of the brake resistor to ensure it is not broken or open-circuited.

3. 3

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