There are only 2 versions of the veritas blank end-station the R8 and R8 plus. The R8 plus has comms outputs and supports eol wiring, but other than that their operation is identical. i suggest that you get the installation manual and reset it to the factory defaults. Also fit a new battery.
http://www.diy-alarms.co.uk/catalog/index.php?cPath=124 for batteries
lee
October 2008