on the key pad in 'SYSTEM' it says RIOS FITTED -2 CODES USED 3
And in 'DISPLAY ZONES'
1011, 1012, 1013 & 1014 all say CLOSED - INTRUDER.
1015, 1016, 1017 & 1018 all say TAMP O/C - INTRUDER.
All detectors appear to be working. Also yes there is a door sensor too.
Looking like it might...