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

1. Increase the setting value for Pr.01-13, Pr.01-15, Pr.01-17 and Pr.01-19
(deceleration time).
2. Connect brake resistor, brake unit or COMMON DC bus to 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).
Adjust braking level (Pr.07-01 or the jumper of the brake unit)

Check the wiring of brake resistor or brake unit.