Directed Electronics AVITAL 3001L - Manual (Page 12)

8 © 2009 Directed Electronics
Nuisance prevention circuitry fi
Your system has Nuisance Prevention Circuitry (NPC). This circuitry
prevents annoying repetitive trigger sequences due to faulty door pin
switches or environmental conditions such as thunder, jackhammers,
airport noise, etc.
Here’s how it works:
The alarm triggers three times. Each time, the same sensor or switch
is triggering the alarm. The three triggers are within 60 minutes of
each other. Your system will interpret this pattern of triggers as false
alarms. After the third trigger, your system ignores, or bypasses that
sensor or switch (along with any other sensors or switches sharing
the same zone) for 60 minutes.
If the bypassed sensor tries to trigger the system while it is being
bypassed, the 60-minute bypass period will start over. This ensures
that a sensor that is continuously triggering will remain bypassed.
Doors are covered differently: If the alarm is triggered by an open
door for three full cycles (one-and-one-half minutes), the doors will be
bypassed until the door is closed.
Important: Arming and disarming the system does not reset the
bypass feature. The bypass zone is reset by not triggering for 60 min-
utes or by turning the ignition On. When testing your system remem-
ber the bypass circuitry can cause zones to appear to stop working.
If five chirps are heard when disarming, NPC has engaged. If you
wish to clear the memory, turn the ignition key on.