Brake chopper supervision

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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.

• Brake resistor circuit fault or short circuit.
• Brake chopper module failure.
• Overheating of the brake resistor.
• Brake control signal malfunction.
• DC bus voltage exceeding brake capacity.

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1. 1

   Verify that a brake resistor is correctly installed and securely connected to the frequency converter's brake terminals.

2. 2

   Measure the resistance of the brake resistor to ensure it is within specified limits and not open-circuited.

3. 3

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

4. 4

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