Hello all

I have a water cooled GDZ-100-4.5 spindle 220V 400Hz 24000rpm spindle and my VFD is a YL620-G-5.5Kw 220V. I have everything running as it should but need to change the disply to show RPMs instead of the frequency (which I think its currently displaying) I have tried pushing the display button (many times over) but it never changes anything. I am unable to get it to display RPMs. Attached is a picture of the display I have.
I read somewhere people were potentially changing something in P00.24 but i have not had any luck with this either (attached are the manual pages discussing these settings.

Any help would be greatly appreciated.