Automatic Motor Tuning Faulty Motor Phase

What does 52 mean?

During Automatic Motor Tuning (AMT), the drive detected that the motor current in at least one of the motor phases is too low. This could be caused by an open circuit in a motor phase, a loose connection, a damaged motor winding, or a problem with the current measurement circuit. This prevents successful motor characterization.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Verify the motor insulation resistance to ground using a megger to rule out phase-to-ground faults.

2. 4

   Ensure the motor is not mechanically jammed or prevented from rotating during the AMT attempt, which could suppress current flow.