Okay, so F0.03 is defaulted to '0'?, so that's keyboard input. What happens if you Press RUN then press the UP (/DOWN) buttons - that *should* change the speed setting and the motor RPM. Report back.

You *could* (later) change F0.03 to 1, I would expect (guess) that would then allow the rotary pot to control the spindle speed.

EDIT:

Until you can get the VFD to indicate a speed other than 0, then trying to diagnose the spindle behaviour is a bit of guesswork