if you access the end station try the following
 remove mains
 remove battery
 put a link between 0v and tamper on the siren out pins on the pcb
 remove connections to zone 1 (1001)
 defeat panel tamper switch, put the end station panel screw in place
 then power the panel up bay battery first then mains
 enter default code 1234 (or12345)
 this should silence the system
 then ESC
 then enter default engineers code 1122 or 112233 depends on software version
 then ENT
 enter engineer code again that should default back to factory
 BE AWARE BY DOING THIS YOU NOW HAVE TO REPROG THE WHOLE SYSTEM
 do not do this unless you have either an engineers book or have knowledge of the system
                
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 January 2012