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Posted by Paul Ekins on February 20, 2008, 2:58 pm
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I am guessing from your post, the living room and kitchen PIR's are close to
each other, even possibly on same cable, and I expect you have caught a
cable when re-securing the floor boards.
The Veritas R8 does not have resistors to alert you to this type of fault,
the detectors work on a normally closed circuit. When the detector light
comes on a small relay opens the circuit causing the alarm to activate. This
is not happening because you have created another closed (short) circuit
with the screw.
> Hi guys
>
> We have a Veritas R8 alarm system. This morning we noticed that walking
> into the kitchen did not activate the part alarm unset procedure. I
> performed a walk test and both the kitchen and the living room PIR are not
> working.
>
> The red light in the PIR still works, it is just not activating the walk
> test procedure. Are PIR's self powered with an internal battery or do they
> take power from the main alarm panel? The reason I ask is I have put quite
> a few chipboard screws in the upstairs chipboard floor to cure loose /
> squeaking boards, and am now thinking worst case scenario that some how a
> screw has pierced a cable. But if the PIR takes power from the panel this
> hopefully cannot be the case as the red light in the PIR still comes on
> upon detection.
>
> Can PIR's fail but the red light still activate?
> Could this be a problem with the main alarm panel? Is there any other
> tests which I could carry out to narrow down the problem?
>
> TIA
>
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