I would be looking for loose wire, losse resistor on the zone, rat attack faulty PIR as if you have told panel not to send restores ,bypasses , system alarms the zone must be going into alarm regulary to send an alarm event to the dialler , maybe box tamper if you have used on board pins
by default programming the NX sirens only activate once per zone so if you havent altered this siren would sound only the once for the 2 minutes you quoted and then go silent
Bookmarks