Directed Electronics Viper ESP 540 Guía de instalación descargar pdf (Pagina 85)

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

bypassed until the door is closed.

Important: Arming and disarming the system does not reset the bypass

feature. The bypass zone is reset by not triggering for 60 minutes or by

turning the ignition On. When testing your system remember the

bypass circuitry can cause zones to appear to stop working. If five chirps

are heard when disarming, NPC has engaged. If you wish to clear the

memory, turn the ignition key on.

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Directed Electronics Viper ESP 540 Guía de instalación Pagina 85