Viper 700 ESP - Manual (Page 14)

13
© 2000 Directed Electronics, Inc.
Your system has DEI ® ’s Nuisance Prevention ® Circuitry (NPC ™ ). It
prevents annoying repetitive trigger sequences due to faulty door
pin switches or environmental conditions such as thunder, jack-
hammers, airport noise, etc. Here’s how it works:
The alarm triggers three times. Each time, the same sensor or
switch is triggering the alarm. If the three triggers are within 60
minutes of each other, NPC ™ will interpret this pattern of triggers
as false alarms. After the third trigger, 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 tries to trigger the security system while it
is being bypassed, the 60-minute bypass period will start over.
This ensures that a sensor that continually triggers will remain
bypassed.
Doors are covered by NPC differently: If the alarm is triggered by
an open door for three full cycles, the doors will be bypassed until
the trigger ceases.
NOTE: Arming and disarming the system does not reset this function!
The only ways to reset a bypassed zone are for it to not trigger for 60
minutes, or to turn on the ignition. If testing your system, it is
important to remember that the NPC programming can cause zones to be
bypassed and appear to stop working. If five chirps are heard when dis-
arming, NPC
™ has been engaged. If you wish to clear the NPC ™
memory, turn the ignition key on.
NPC ™ is programmable. See Programming Options section of this
guide.
Nuisance Prevention ® Circuitry