Cause : Brake resistor comes when brake resistor broken or not connected or a problem with the resistor responsible for dissipating energy during braking operations.

The fault code 7181 in your ABB ACS560 drive indicates a brake resistor fault. This signifies an issue with the external braking resistor connected to the drive.

1. Check that a brake resistor has been connected.
2. Check the condition of the brake resistor.
3. Check the dimensioning of the brake resistor.