Why can’t VFD accelerate/decelerate when it is running, using the keypad?

In this case, the following situations may occur:

  • The UP/DOWN function is disabled
  • The buttons are stuck or the keypad cable is disconnected
  • The motor is mechanically blocked or damaged
  • The output current of VFD reaches the protection threshold

Troubleshooting steps:

  • Enable the UP/DOWN function via the keypad
  • Resolve any mechanical load blockage before attempting to run again
  • Contact the supplier for further assistance