Cause : Circuit breaker error comes when the DC bus voltage level is incorrect compared to the circuit breaker logic control (start or stop pulse) after the configured timeout. This means the drive has detected an issue with the circuit breaker that protects the motor connected to it.

A CBF fault in Schneider ATV610 drive indicates a Circuit Breaker fault. This means the drive has detected an issue with the circuit breaker connected to the motor.

1. Verify the circuit breaker logic control (pulse time for start and stop).
2. Verify the mechanical state of the circuit breaker.
3. Verify the measured values of [DC bus voltage] VBUS and [Mains Voltage] ULN parameters.