Home Alarm Ness D816
3am this morning and the alarm goes off but to my knowledge it was not armed, Unless the grandkids were playing with it yesterday and somehow managed to ARM it
but I would be surprised if that was the case as u need to press ARM/E only or ARM/****/E exactly as that ( **** is a 4 digit code)
I only have 2 PIRs and there is a tamper switch in the alarm/light box
ARM/E activates 1 PIR only and makes 3 beeps on the control pad and displays a Lock symbol and Armed 1
ARM/****/E activates both PIRs makes 3 beeps on the control pad and displays a Lock symbol and Armed 1,2 and the siren sounds for about 3 seconds.
Now even if the alarm was ARMED one of the PIRs need to be activated which was not possible by humans as we were both in bed
and checking the CCTV footage at the alarm time there was nothing evident at the time.
Upon arming and testing the system this morning one or the PIRs is not working, everything else tests fine. Backup battery is Good
My question is is it possible for the system to arm itself and or activate the alarm without being ARMED ?
Or is there some possibility the failed PIR caused it
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