Thank you Chris. They have attended but seem unable to cure as it is intermittent and they can't put their finger on the fault. The engineer is very helpful but I think lacks experience. the management suggests a new panel and siren at my expence. I am not about to consent to this. I would sooner fit my own wireless system, and have control over it. I did stop the siren by hitting the attack buttons, but when I reset, the siren went off again. I hit the attack buttons again and the siren stopped. The second time I reset, the system settled down. Some times during the day the siren will sound for a while and then stop by itself. This problem has existed for some time now, and judging by the amount of complaints I see on this site, I feel I should just consider another system. Thank you Chris for your comments.
Charles, March 2007