What is an open zone and how do I fix it
an open zone is a detection zone that has a broken or loose wire in which the end of line resistor is not being seen from the panel.
each zone wire loop is constantly monitored using a resistor at the very end. this resistor is a specific value and is usually different for each brand of system. the resistor is either attached to the 2 wires at the end, or more commonly installed at the last device on that loop - again across the 2 wires.
as long as the panel can "see" the resistor there, the zone is normal.
if the 2 wires are shorted together, the zone is in alarm.
if either of the wires are broken, the zone goes into an "open" condition, meaning the circuit is open and the resistor can no longer be "seen".
fixing the open circuit involves using an ohm meter to read the resistance of the wiring and tracing the wiring from one end to the other to find the "broken" wire or loose connection.
it is not an incredibly hard process, but does take some skill. if you are not handy with an electrical meter, calling someone who is would be your best bet.
Not finding what you are looking for?
