how do i reset the codes if i havent got them c&k700?

i have just moved into a property and wasnt given the codes for the alarm as it was a repossession, all electricty was swithched off when i put the mains on the alarm goes off. how do i reset to factory setting if possible. i have tried 0000 and 9999 and 1234. it is a c&k 700l.