Top man Peter James - I started to work through your suggestions and as I did so I also did a visual inspection of the connections in the control panel. As I touched the zone 7 (false alarming) the yellow cable which is the alarm cable fell out of the connector. I noticed more than 50% of the multi core wire had broken away. I double checked the rest - all were OK. I'm going to soak test over the next few days.
I had only checked the internal battery which was fine.
I appreciate that this may not be the problem but its a good starting point.
I have one more question. Is it possible to programme the FA zone out of the system? Or do I need to disconnect the zone in the CP. I am going away for month of February and If the problem persists I would like to set at least part of the alarm.
I must thank you once again for your time and input on this it is very much appreciated. Whilst I'm happy around handling electronics and looking at the physical side of things, the old brain slows down a bit after time.
Back in the late 60's I worked on fighter aircraft radio systems and their wiring.
Lets hope the problem is fixed.