Cause : Low-voltage during deceleration comes when the DC bus voltage within the drive has fallen below a set limit while the motor is either running at a constant speed or decelerating.

The Lvd fault in delta drive indicates a Low-voltage During Constant Speed Operation condition. This means the DC bus voltage within the drive has fallen below a set limit while the motor is running at a constant speed.

1. Immediately act when the DC bus voltage is lower.
2. Improve power supply condition.
3. Adjust voltage to the power range of the drive.
4. Check the power system.
5. Increase the capacity of power equipment.