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https://www.askthetrades.co.uk/cgi-bin/yabb/YaBB.pl DIY Forum >> Alarms, Phones, Aerials, CCTV & Datacomms >> Veritas 8 PIR keeps setting the alarm off https://www.askthetrades.co.uk/cgi-bin/yabb/YaBB.pl?num=1529134493 Message started by Mo on Jun 16^th, 2018, 8:34am

Title: Veritas 8 PIR keeps setting the alarm off
Post by Mo on Jun 16^th, 2018, 8:34am

I have a Veritas 8 alarm
Over the last week, twice, One of the zone PIRs is setting the alarm off
I check and cannot see the reason, no cobwebs, etc....
The PIR has been working fine for 3 years
I know I can partnset the alarm if this persists
What I would like to get guidance on is other possible causes.
Do these PIRs have batteries, I know they are wired
If I have to replace the PIR - how to do that
I have the engineer code
Thanks in advance Mo

Title: Re: Veritas 8 PIR keeps setting the alarm off
Post by Lectrician on Jun 16^th, 2018, 8:51am

You can short out the NC terminals inside the PIR which will prevent the PIR signalling an alarm. This will prove if it is the PIR that is faulty, or the wiring/panel. Start with doing that, and then we can advise further.

When you remove the PIR cover, the tamper alarm will go off, which can be reset with the user code, unless set for engineer reset only, but as you have the engineer code, you're fine.

Title: Re: Veritas 8 PIR keeps setting the alarm off
Post by Mo on Jun 17^th, 2018, 6:33am

Thanks for the information. I manage to omit the PIR from the full setting using the engineer settings. This a a temp fix.
A PIR that is wired does not h ave a batttery ?

What are the NC terminals ? Excuse my lack of knowldge

Title: Re: Veritas 8 PIR keeps setting the alarm off
Post by Lectrician on Jun 17^th, 2018, 8:08am

There will be no battery.

NC are the pair of contacts which open when movement is detected. There are 6 terminals inside, 2 for power, 2 for the tamper switch on the cover, 2 for the NC (normally closed) alarm output.

Short the NC together with a short bit of wire or bent staple, and reprogram the one to respond as normal, or even put it as a 24hr zone. if it never goes off, you know the wiring is sound.