My alarm is saying CCT - and some numbers constantly that I don't know what's wrong with it. Last week I was nailing something into the ceiling and the nail shot through a bedroom ceiling and the alarm went off as if the nail somehow set it off? It was installed in the early 90s and does anyone remember the model numbers of the horn sounders that these old systems used as I want to add one to the back of the house as well if anyone has got one or knows where to buy it?
Thanks
Thanks