Directed Electronics 3902V, Owner'S Manual

10

© 2007 Directed Electronics-all rights reserved

Diagnostics

The microprocessor at the heart of your system is constantly monitor-

ing all of the switches and sensors connected to it. It detects any faulty

switches and sensors and prevents them from disabling the entire sys-

tem. The microprocessor will also record and report any triggers that

occurred during your absence.

Arming diagnostics

If the system is armed with an input active (door open, sensor trigger-

ing, etc.) the unit will chirp once when arming and then one more time

a few seconds later. This is called bypass notification.

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.

Disarming diagnostics

Extra disarm chirps are the tamper alert. If four chirps are heard when

disarming, the system was triggered in your absence. If five chirps are

heard, a zone was triggered so many times that false alarm prevention

circuitry has bypassed that zone. In either case, the status LED will indi-

cate which zone was involved (see Table of Zones section). The system

will retain this information in its memory, and chirp four or five times

each time it is disarmed, until the next time the ignition key is turned on.

nnoottee::  Bypass notification will not occur if chirps have been
programmed OFF.