Why, after issuing the run command, does VFD run, but motor doesn’t?

The reasons could be:

  • Running frequency = 0.
  • The motor is faulty, the load is too heavy, or there is a mechanical jam.
  • The VFD has lost output phase or has an unbalanced output phase.
  • The motor and VFD connection cables are severed, or the contactor (if present) connecting the VFD and motor is not closed.
  • The control board is faulty.

How to resolve this:

  • Increase the running frequency for the VFD.
  • Address motor issues and resolve mechanical jams before restarting.
  • Check motor and VFD connection cables.
  • Contact the supplier for assistance.