Viper 420 ESP - Manual (Page 18)

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© 1999 Directed Electronics, Inc.
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 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.
Diagnostics
The microprocessor at the heart of your security system is con-
stantly monitoring all of the switches and sensors that are con-
nected to it. It detects any faulty switches and sensors and pre-
vents them from disabling the entire system. The microprocessor
will also record and report any triggers that occurred during your
absence.