Directed Electronics AM5 manual Nuisance prevention circuitry, Here’s how it works

The LED will flash in two groupings representing the last 2 zones trig- gered. For example, if zone 2 and 3 were the last two triggered, the LED would flash two times followed by a pause then it would flash three times followed by a pause. Turn off the ignition switch or wait one minute to exit the history display. See Table of Zones on p. 14 for zone information.

Nuisance prevention® circuitry

Your system has Nuisance Prevention® Circuitry (NPC). This circuitry pre- vents annoying repetitive trigger sequences due to faulty door pin switches or environmental conditions such as thunder, jackhammers, airport noise, etc.

Here’s how it works:

The alarm triggers three times. Each time, the same sensor or switch is triggering the alarm. The three triggers are within 60 minutes of each other. Your system will interpret this pattern of triggers as false alarms. After the third trigger, your system 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 system while it is being bypassed, the 60-minute bypass period will start over. This ensures that a sensor that is continuously triggering will remain bypassed.

Doors are covered differently: If the alarm is triggered by an open door for three full cycles (one-and-one-half minutes), the doors will be

12 © 2008 Directed Electronics All rights reserved