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If the system worked when first installed it sounds like you have accidently altered the program settings. The simplest way to sort this is to follow the engineers instructions for a factory default. As sent from factory the system will work as near as you want it to. Once this is done you...

I would agree with Joe 90 This problem sounds very much that there either a dodgy battery or lack of supply either fuse or low voltage. The PIR's reqiure a constant 12v voltage to operate when power is off they will go into alarm where as a door contact is not affected. This would also...

Your unit looks like it requires a switched -ve to operate it. The +ve will be the other side of the dialler connection, this should be the aux 12v +ve or the 12v +ve to the PIRS etc.. The other connection you mention looks like an inhibit line ignore it. If your bell output does not provide...