New windows fitted and now alarm won't set.

[catengineman]

So you would agree that bridging out the PIR's to the lounge would then indicate whether the fault was with them (if done one at a time individually then together) this would point to if it is one or both (supposing that the fault goes with this) If one then that one cable can be belled out to see why. if both then it would appear to be a *common* connection (possibly the power and negative leads in series) again because you know where the cable starts and ends you can bell this out to see if it is a break or other fault.

The zone for the lounge will be marked as a zone and the owner will know where the PIR's are and can open the control panel and the PIR's to get access to terminals.

 

[RigidRaider]

Wow! Thanks for all the replies. As you've realised this could turn into quite a puzzle so in the end I caved in and got a professional in, haven't seen him but he's just phoned to say that he's finished and got the system working, sounds as if he had a right old nightmare with all the cabling installed by the builder/previous owner. (The guy was nuts about wiring and the house is full of all kinds of cables including coaxial to every room!)

The original windows had small top-opening casements at the bottoms, which were alarmed with contacts because they looked like a great place to break in unseen by neighbours. Full length windows have now been fitted making those redundant and my mistake was in forgetting to tell the window fitter to find the wires and twist them together.

Thanks again for all your contributions.