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Sounder not working


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Recently my Sounders have stopped working.  If I put the system into alarm, I get 0V at the sounder and when I measure across the terminals at the panel. If I remove the wires from the sounder terminals at the panel it measures 12V. Don’t understand what’s going on? Any ideas?

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It’s a paradox system. It won’t let me upload any photos. 
 

At the sounder I have a set of terminals labeled siren + and -. I measure across them when the system is in alarm and it’s 0V. I have strobe terminals labeled + and - and I measure 12V Dc. 

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2 hours ago, sixwheeledbeast said:

Are you in the UK? Not a brand seen here.

It could be the output is blown if it's been overloaded?

Put 12v on the sounders see if they work?

via a fuse...

 

If your disconnecting the sounder and it showing 12v in alarm then you either have a knackered sounder or cable issue. Have you metered the cable?

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1 hour ago, sixwheeledbeast said:

Was thinking a battery but yes not the system incase the devices are faulty.

 

agreed but if its in short, putting it across a battery with no fuse will spark a lot...

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