The alarm system (Accenta G3) was installed a long time ago (maybe 20 years). The system was working fine until I changed the battery. (A recent power cut caused me to realise that the battery was dead). I did my research and bought a like for like battery. I installed it and when activating the alarm 2 of the 5 PIR’s come us faulty (I can see that the two PIRs in two rooms on the ground floor are not lit up). I can set the alarm by ‘omiting’ those two PIRs. I presumed I must have dislodged a wire when I had put in the new battery. I took the front off the alarm box and cannot see any loose wires.
Because all was good before the new battery I am presuming this is something simple but, of course, I don’t know - any ideas
TIA
