Replaced a PIR sensor, getting a tamper light on Scantronic 9448 system

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I replaced a sensor using the configuration in the attached photo. It matches that of another sensor in the house. However I keep getting a tamper light.

Does it need an engineers reset after a sensor change or does this indicate bad wiring?

Also I noticed from online tutorials the normal colours for tamper are green and yellow but someone had wired them as green and white on one sensor. Has this happened to work because of they way they connected it at the panel? I'm guessing best practice is green and yellow make up the tamper?
 

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Errrr no the colour can be what ever ....what colours did the last sensor use ? Did you take a picture before ?
 
From the look of that ....tamper is green and yellow , alarm blue and white
Swop the yellow with white in the replacement
 
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From the look of that ....tamper is green and yellow , alarm blue and white
Swop the yellow with white in the replacement

Thanks this makes sense, however I am an idiot and forgot to remove the power as I just did it. I think as I removed the yellow it blew a fuse as the fuse wire has broke. Hoping I can just replace it and it works.
 
Ok so replaced the fuse, swapped the yellow and white, the wiring looks correct and all the sensors initialise.

I get a difference tamper light now, before the tamper light was flashing with the zone I had replaced, but now its just a flat tamper light without any zone flashing which suggests a different tamper problem?
 
Just to confirm I have had the battery replaced and the wiring looks spot on, any idea why a new sensor would do this? Only thing I can think is that the old sensors were NC. Whilst these Risco IWise ones dont have NC written but just "alarm" where the wires go.
 
All devices are normally closed apart from some old pressure mats ....just check what jumpers you have fitted on that device ...
 
All devices are normally closed apart from some old pressure mats ....just check what jumpers you have fitted on that device ...

Thanks - I have left them as the default ones. i.e no jumpers attached apart from the 12v selection
 
ANyway I can isolate the sensors? Can i safely loops the tampers by connecting them together and by pass the sensor?
 
Twist the tamper pair together at the detector and try to set it ....what happens
 
Thanks, after isolating all of them and turning one on by one, I isolated as two being an issue with the front tamper spring not connecting, who would have thought brand new sensors need the spring adjusting!!

Thanks again
 

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