Cause : Low-voltage during acceleration comes when the DC bus voltage within the drive has fallen below a set limit while the motor is accelerating.

The LvA fault in delta drive drive indicates a Low-voltage During Acceleration condition. This means the DC bus voltage within the drive has fallen below a set limit while the motor is accelerating.

1. Improve power supply condition.
2. Adjust voltage to the power range of the drive.
3. Check the power system.
4. Increase the capacity of power equipment.