its a galaxy keypad, will work with any galaxy panel from now back to the old classics.
they should be able to reset the whole programming. Whats the sticker on the panel say, im assuming its a gal 8 or 18. Maybe a 16+ either way its resetable but i would upgrade everything but the keypad if i was you.
unless they just fit enforcers or ajax, if so id find another approved co that supports galaxy.