PI problem

Joined
16 Jan 2008
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Location
Antrim
Country
United Kingdom
I have a NEWLEC alarm system with PIR sensors. One of the sensors appears to stay on permanently showing a red light. I cannot set the alarm because of this. Does any one know what the problem would be?
 
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Probably faulty sensor, or maybe low voltage at the sensor.

Test the voltage with a meter and you should get 12-13 volts.

If voltage ok then replace sensor, cutting each core close to where it is connected to the sensor (so as not to short circuit anything and you will also be able to see what colour goes where)
 

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