Directed Electronics NONE AM5 - Manual (Page 15)

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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