Over-voltage

What does 8 mean?

This error indicates that the DC bus voltage within the drive has exceeded its maximum permissible limit. This condition is commonly caused by regenerative energy from the motor during deceleration, excessive input voltage, or a malfunction of the braking unit.

• Regenerative energy from the motor during deceleration or lowering loads exceeding the capacity of the braking resistors.
• Input voltage supply is too high, unstable, or experiencing voltage spikes.
• Braking unit or braking resistors are faulty, disconnected, or incorrectly sized for the application.
• Rapid deceleration commanded with insufficient or no braking capacity.

Click steps to track your progress.

1. 1

   Verify the input line voltage to the drive using a multimeter to ensure it is stable and within the specified operating range.

2. 2

   Increase deceleration ramp times in the drive parameters to reduce the amount of regenerative energy generated by the motor.

3. 3

   Check the braking unit and braking resistors for proper function, integrity, and correct sizing for the application.

4. 4

   If external braking choppers are utilized, verify their operation and activation thresholds.