Diagnostics; Arming Diagnostics - Viper 426FS Owner's Manual

If the bypassed sensor tries to trigger the system while it is being by-
passed, the 60 minute bypass period will start over. This ensures that a
sensor that a sensor that continuously triggers will remain bypassed.
Doors are covered by NPC differently; If the alarm is triggered by an open
door for three full cycles (one-and-one-half minutes), 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 remain untriggered
for 60 minutes, or to turn on the ignition. If testing your system, it is impor-
tant to remember that the NPC programming can cause zones to be
bypassed and seem 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 on.

Diagnostics

The Microprocessor at the heart of your system is constantlly monito-
ring all of the switches and sensors connected to it. It detects any faulty
switches and sensors and prevents them from disabling the entire system.
The microprocessor will also record and report any triggers that occured
during your absence.

Arming Diagnostics

If the system is armed with an input active (door open, sensor
triggering, etc.) the unit will chirp once when arming and then one more
time a few seconds later. This is called Bypass Notification.
NOTE: Bypass Notification will not occur when using Silent Mode
or if chirps have been programmed OFF.
The system will ignore the input that was active when it was armed
until it goes away. Three seconds later it will monitor that input normally.
For example, if your car has interior light exit delay, and you arm the
system before the interior light goes out, you may get Bypass Notifica-
tion. Once the light goes out, however, the doors are monitored normally.
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