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©
2001 Directed Electronics, Inc.
Your security system has Nuisance Prevention Circuitry
™
(NPC
™
) to
prevent annoying false alarms. This circuitry is designed to prevent
repetitive trigger sequences due to faulty door pinswitches or envi-
ronmental conditions such as thunder, jackhammers, airport
noise, etc.
Here's how it works: If the alarm is triggered by the same sensor
or switch three times within a 60 minute period, your system inter-
prets this pattern of triggers as false alarms. After the third trigger,
the NPC
™
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 is triggered again while it is
already being bypassed, the 60-minute bypass period will start
over. This ensures that a sensor that is continually being triggered
will remain bypassed.
The vehicle doors are protected differently by NPC
™
. If your security
system is triggered by an open door for three, full 30-second cycles
(one and one half minutes), the system will bypass the doors until
the trigger ceases.
NOTE: Arming and disarming the system does not reset the NPC
™
. The
only ways to reset a bypassed zone are for that zone not to be triggered
for 60 minutes or to turn the ignition key on. When testing your system,
it is important to remember that NPC™ can cause zones to be bypassed
and appear to not work. If five chirps are heard when disarming the
system, NPC™ has been engaged. To clear the NPC™ memory, simply turn
the ignition key on.
Nuisance Prevention
®
Circuitry