Jevremco
I'll have to go rummaging through a lot of old docs to find what you are looking for in terms of the "key" indicator..
on the E046, the last pump I had was merely a case of fastening the syringe size potentiometer clip (Not at all in line with the error code index of the OEM)and re-calibrating the occlusion limit.
If you don't have the correct guages I would suggest you get in touch with Braun for a set. (I found using a generic set just didn't cut the cake "so to speak" during a previous battle with a compact s)