How can you give a positive answer to this without telling op to get the multimeter out and do some checks,
Experience is screaming backup battery or the panels buggered but my head is saying wiring/terminal corrosion or the sounder's buggered.
I totally dislike giving advice regarding sounder/strobe issues to a DIYer because it involves getting up there on a set of ladders,removing it's cover being startled by the sounder sounding off and not to mention the high voltages present that run the strobe.
One can easily fall when startled and the strobe,s got a hell of a bite too if a novice pokes about in there and doesn't know what their doing,Very dangerous.
Another thing that's necessary on these DIY forums is a control back up replacement,and we always tell the user to switch power off first,very very important for their own safety,but and there's always a but ......In most cases a full power down can in some cases cause outer problems to the user like a reprogram.
We as engineers work on these systems live yes?
Are we giving advice here or creating another issue for the user,or have I been out of the trade for so long and these modern panels don't revert with a total power loss??.
e manno
November 2012