First, check if the “RUN” status light is still illuminated. If it’s off, the following reasons may apply:

• The control signal to start VFD has been interrupted (control wires are disconnected or loose at control terminal).
• The VFD has an error condition. If there is an error, VFD will stop, display an error code, and the “TRIP” light will illuminate.

To resolve this:

• Check the control wires that start the VFD and tighten the control terminal connections
• Refer to the error code table for troubleshooting
• Contact the supplier for the best support

If the “RUN” light is still on, the issue may be one of the following

• The VFD speed has decreased to 0
• The motor is mechanically jammed or damaged
• The control board is faulty

To address this:

• Increase the VFD speed by adjusting potentiometer or pressing and holding UP button.
• Check the potentiometer wiring
• Address any mechanical jams or motor issues
• Contact motor supplier for assistance