second hand Eliwell ID961

Hello,
I bought one. I have no experience with this controller yet.
The firmware - software seems to be different than usually written in manuals.
It has FAN menu, PA1 and PA2 protected area. Inside CNF, I can found H41, H42, PA2, REL, TAB menu points.
the REL == 23

Has anybody experienced such menu points, so this version has a custom code ?
If not, how can I access those menu points written in manual ?
The Machine Status Menu shows PB1 and PB2 probes, but this model has only one temperature input.

Any idea how to reset to factory settings ?
Thanks.