Cause : OVER SWFREQ comes when switching frequency is too high. The switching frequency refers to the rate at which the drive switches the power transistors on and off within the inverter section. This rapid switching controls the voltage and current delivered to the motor.

The code FF55 in your ABB ACS800 drive indicates a fault related to the switching frequency being too high.

1. Check motor parameter settings (parameter group 99 START-UP DATA).
2. Ensure that ID run has been completed successfully.