Brake chopper supervision

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This fault indicates that either no brake resistor is installed, the installed brake resistor is broken, or there is a failure within the brake chopper unit itself. This prevents proper dissipation of regenerative energy.

• The brake chopper circuit is not functioning as expected.
• Excessive voltage detected across the brake chopper resistor.
• Failure of the brake chopper semiconductor switch.
• Brake resistor is open or shorted.
• Brake chopper duty cycle exceeded.

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1. 1

   Check the brake resistor for continuity and proper resistance value.

2. 2

   Verify the cabling between the frequency converter and the brake resistor for proper connection and integrity.

3. 3

   If the resistor and cabling are confirmed good, the chopper unit is faulty.