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© 2008 Directed Electronics - all rights reserved
Nuisance Prevention Circuitry
®
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 ten times. Each time, the same sensor or switch is
triggering the alarm. The ten triggers are within 60 minutes of each
other. Your system will interpret this pattern of triggers as false alarms.
After the tenth 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 ten full cycles (one-and-one-half minutes), the doors will be
bypassed until the trigger ceases.
nnoottee::
Arming and disarming the system does not reset this
function! The only way to reset a bypassed zone is for it to
not trigger for 60 minutes, or to turn on the ignition. If testing
your system, it is important to remember that this circuitry can
cause zones to be bypassed and appear to stop working. If
five chirps are heard when disarming, false alarm protection
has engaged. If you wish to clear the memory, turn the igni-
tion key on.
G330X_1-3_2008_02B.qxd 2/14/2008 4:28 PM Page 9