"Christian McArdle" wrote in message
. net...
I have eliminated the Tamper circuit as being the problem by linking it
out

My Optima (just bought so may be entirely different to yours) has several
tamper circuits. There is one for the bell box, one for detector wiring
and
one for external keypads. There are also two internal spring tamper
switches, one visible on top of the PCB, one invisible behind it. Have you
checked them all?

Christian.

Trouble started during the hot weather before the storms,but as yet I
haven't checked the bell tamper.Maybe the bell box has moved a bit?

Simmo