Motor Cable Fault

What does MOTOR CABLE Ax mean?

This error indicates a power unit overcurrent due to a short-circuit or ground fault, detected by hardware monitoring. It can also signify a ground fault detected by software monitoring, affecting the motor cable or motor itself.

1. 1

   Perform a visual inspection of the motor cable for the specified axis (Ax) for visible damage, insulation breaches, short circuits, or ground faults.

2. 2

   Measure insulation resistance between motor phases U-V, V-W, U-W and each phase to ground using a megger – expect >1 MΩ.

3. 3

   Check the motor itself for internal faults that could cause a short circuit or ground fault.