one zone alarms after away arming but not after stay arming

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I have a texecom 816 been working ok for a while.
.At random times When the system is away armed the alarm triggers on one zone
(interior pir).
But the system does not trigger when stay armed.
What should I look for?
Thanks
 

Re: one zone alarms after away arming but not after stay arming
On 10/12/2014 01:38 PM, reede wrote:
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bad connection in PIR, bugs in/near PIR, environment issue.  Try  
replacing the PIR. Next, stap out the contact on the PIR (possible  
wiring issue).  Next strap the zone in the control (bad control?)

John Sowden
American Sentry Systems, Inc.


Re: one zone alarms after away arming but not after stay arming
On Sunday, October 12, 2014 4:38:00 PM UTC-4, reede wrote:
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one

I'm not familiar with the Texecom panels but I'll presume that it works lik
e other panels with regard to "home" and "away" arming.

If the panel is working properly and is programmed properly, when you arm t
he system in the home mode the motion detector will be bypassed. When you a
rm it in the away mode the motion detector will not be bypassed. Obviously,
 when you are home, and the system is armed, if there is anything in the ro
om that would set the motion detector off, the system would not go into ala
rm condition.  

Motion detectors are usually pretty hardy and very seldom fail. The reasons
 why they trip (for no APPARENT reason)are many. Stray sources of infra red
 or object that reflect infra red are most common. I don't know where you a
re located but if the weather is starting to get cold and your heating syst
em is kicking on, you may have a heat source in view of the motion detector
 that wasn't there when the system was installed. Also, as the seasons chan
ge, the sun can enter a room at a different angle and shine on or be reflec
ted off of something in the room that the motion detector now detects. Do t
he false alarms happen at a certain time of the day? Sunrise? Sunset? If at
 night, are there any ways that light from outside the house could shine in
 through blinds (car headlights)? Have you got a fax machine in the room? A

ill even set off pet immune motion detectors) Take a look around the room f
or anything that has changed or could be a source or reflect a source of li
ght. Keep in mind that even though plants are green, they can reflect infra
 red. If the plant is moving due to forced air heating system, the motion d
etector will see it as a source of moving infra red.  

Check it out...........  

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