Overvoltage Condition (Load Side Power-up, Adv. Code 2)

What does 13 mean?

This fault signifies an overvoltage condition detected on the load (motor) side during power-up. While related to input overvoltage, this advanced code might point to an issue specific to the motor connection or residual voltage on the motor leads. High voltage can damage the motor insulation or the drive's output stage.

• Motor cable capacitance charging rapidly during power-up, especially with long motor cables and high switching frequencies.
• Reflected waves on long motor cables causing voltage peaks exceeding the drive's DC link rating (e.g., without output reactors).
• High input line voltage combined with the back-EMF (Electromotive Force) from a rotating motor (e.g., fan coasting down).
• Faulty DC link voltage measurement circuit within the drive.
• Incorrect drive sizing for the application, especially with highly regenerative loads or insufficient braking resistors.

Click steps to track your progress.

1. 1

   1. Measure the incoming AC line voltage at the drive input terminals (L1, L2, L3) to confirm it is within the specified operating range (e.g., 400V +/-10%).

2. 2

   2. Verify if the motor is rotating or has kinetic energy (back-EMF) when the drive attempts to power up; allow the motor to come to a complete stop.

3. 3

   3. If motor cable length exceeds recommended limits (e.g., >100m), consider installing an output du/dt filter or sinusoidal filter.

4. 4

   4. Check parameter P0-13 (DC Overvoltage Limit) if adjustable, ensuring it is set appropriately for the system voltage and does not trip prematurely.

5. 5

   5. Implement a pre-charge sequence if available, to slowly charge the DC link capacitors before full power application.

6. 6

   6. Replace the drive unit if all external factors are ruled out and the internal voltage sensing is suspected.