Over-voltage during deceleration (ovd)

DC bus over-voltage during deceleration. When ovd occurs, the drive closes the gate of the output immediately, the motor runs freely, and the display shows an ovd error.

Deceleration time is too short, causing too large regenerative energy of the load

1. Increase the setting value of Pr.01-13, Pr.01-15, Pr.01-17 and Pr.01-19
(deceleration time)
2. Connect brake resistor, brake unit or DC bus on the drive.
3. Reduce the brake frequency.
4. Replace the drive with a larger capacity model.
5. Use S-curve acceleration/deceleration.
6. Use over-voltage stall prevention (Pr.06-01).
7. Use auto-acceleration and auto-deceleration (Pr.01-44).
8. Adjust braking level (Pr.07-01 or the bolt position of the brake unit).

Check the wiring of brake resistor or brake unit.