Firstly, if you are paying for service you really should sort this issue out with the maintainer.
These things are 20+ years old. Loss of programming is a sign of a failing panel the NVM should store this stuff even with power loss.
The fact the battery fuse was popped in the past is worrying but we don't know the history for that from your post.
Maybe a surge has caused damage that needs checking. Stuffing some programming in it and hoping will only have your ears ringing in the future.
Anyway I can only imagine the entry time is 0, but been a long time since I had to mess with the programming on one.
They have Away, Home and Night sets from what I recall, make sure you haven't programmed the wrong ones.