You obviously realise it's not your property....... so neither is the system.
However there is a method called a 1st stage reset that resets the user and engineering codes back to factory settings,instructions for this can be found in the engineering or installation manuals.
Can't tell you on here for obvious reasons but you will be surprised at what google will turn up.
I also think you have a door contact problem going on the panels Descriptors.
e manno
September 2013