How to Bypass the Potentiometer on a KBDA VFD
Morgan Byres | Sep 6, 2023
If your KBDA VFD is changing the RPM without any input, it is most likely caused by a damaged potentiometer. There are two fixes: installing a new display board and reprogramming the VFD to bypass the potentiometer. We suggest using the latter as an emergency repair while waiting for the replacement display board to arrive.
This solution involves changing the controls from the knob to the up and down keys. This will allow you to continue to use your pump while waiting for the new part.
Reprogramming the VFD:
Now the potentiometer will be disabled and you can adjust the speed using the Up and Down keys on the keypad. Once you have selected a new speed make sure to press Read/Enter to confirm the selection.