Phase W Fault

What does 40 mean?

This fault indicates a phase-to-ground fault has been detected specifically on the 'W' phase wiring between the controller and the motor. This could be due to damaged insulation or a direct short. Such a fault poses an electrical safety hazard and can damage both the controller and motor if unresolved.

Complete Troubleshooting Guide

1. 1

   Visually inspect the wiring between the controller's 'W' phase output and the motor's 'W' phase for damage.

2. 2

   Perform an insulation resistance test (megger test) on the motor's 'W' phase winding to ground to check for a grounded phase.

3. 3

   Check for moisture or foreign objects in the motor terminal box or wiring conduit.