Europlex 2500?

I rescued an alarm system from the tip and as a project I want to see if I can get it working. It is a Europlex Model 2500. There is a PCB in a white box that has Verifier 24 on the outside, and it has a remote Verifier panel. I have connected it up as best I can and can get the panel to communicate with the board in such that it looks for a PIN to arm and disarm but that is as far as I can get as I don't know the PIN. Can anyone help me with a wiring diagram, install manual, programming, or any sort of help would be great. I can send you pictures of to show this is just sitting on my bench.
Many Thanks.