Senville ducted VRF C to F conversion

I have a Senville 2 ton HP with a wired controller (kit-120n) I have read the book a few times and there is good details on programming and scheduling but nothing I can find to make it read in F instead of C Why do they never add that one line to the book? I’m sure it two buttons for 4 seconds and boom but I haven’t got the combination yet Any help?