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© 2009 Directed Electronics
Nuisance prevention circuitry
fi
Y our system has Nuisance Prevention Circuitry (NPC). This circuitry
prevent s annoying repetitive trigger sequences due to faulty door pin
switches or environment al 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. Y our system will interpret this p attern of triggers as false
alarms. Af ter the third trigger , your system ignores, or byp asses that
sensor or switch (along with any other sensors or switches sharing
the same zone) for 60 minutes.
If the byp assed sensor tries to trigger the system while it is being
byp assed, the 60-minute byp ass period will st art over . This ensures
that a sensor that is continuously triggering will remain byp assed.
Doors are covered dif ferently: If the alarm is triggered by an open
door for three full cycles (one-and-one-half minutes), the doors will be
byp assed until the door is closed.
Important: Arming and disarming the system does not reset the
by p ass feature. The byp ass zone is reset by not triggering for 60 min -
utes or by turning the ignition On. When testing your system remem -
ber the byp ass circuitry can cause zones to appear to stop working.
If five chirp s are heard when disarming, NPC has engaged. If you
wish to clear the memory, turn the ignition key on.
