Over-voltage during acceleration

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

Decrease the acceleration time
Use a braking unit or DC bus
Replace the drive with a larger capacity model

Check if the input voltage is within the rated AC motor drive input voltage range,
and check for possible voltage spikes.

Use a braking unit or DC bus.