Hardware Overcurrent

What does F12 mean?

This critical fault signifies that the instantaneous output current from the drive has surpassed a predefined hardware current limit, indicating a severe and immediate overcurrent condition. This can be caused by a short circuit in the motor or motor wiring, an extremely sudden and heavy mechanical load, incorrect motor parameters, or excessive DC braking. This fault is a protective measure to prevent damage to the drive's internal power devices. Unresolved, it poses a risk of catastrophic drive failure.

Complete Troubleshooting Guide

1. 1

   Check the motor and its wiring for any phase-to-phase or phase-to-ground short circuits using an insulation resistance tester (megger).

2. 2

   Inspect the mechanical system for any sudden jams, blockages, or excessive loads that could cause an immediate current spike.

3. 3

   Review drive programming parameters related to motor control, such as A453 [Boost Select] and DC braking voltage settings, ensuring they are appropriate for the application.

4. 4

   Temporarily disconnect the motor and perform a no-load test on the drive if possible to rule out motor or wiring issues.