BC short circuit
ABB · ACS580 General Purpose Drive
What does 7191 mean?
A short circuit has been detected within the brake chopper circuit, specifically occurring when an earth fault condition is also present and the brake chopper is active. This is a severe fault that can lead to rapid destruction of the brake chopper power components and poses a safety risk due to high current flow.
Complete Troubleshooting Guide
- 1
Immediately de-energize the drive and isolate the brake chopper and resistor circuit.
- 2
Inspect the brake chopper module for any visible signs of damage, burning, or component failure.
- 3
Measure the resistance of the brake resistor and its cabling for any short circuits.
- 4
Verify the wiring between the drive, brake chopper, and resistor for correct connections and absence of shorts to ground.
- 5
Contact ABB service if internal brake chopper failure is suspected after thorough external checks.