Thanks for the reply.
I have read the manual and I realise I can default it in the installer menu, I have already tried all the codes I can think of, I'm sure I wouldn't have changed the Installer code only the user code, but anyway to no avail. Thought bridging the reset terminals on the board might do it but again no good. Thanks for your help, will see if I can get any where with giving Visonic a call, if not it looks like it's going in the bin.