Your system smokes are powered from the control panel alone, at 12VDC. It's a common error to suppose that every detector in the house is part of the alarm system. You cannot bypass a fire zone to arm your system.Ĭouple of other things: Your alarm system smoke detectors do not have 9V batteries in them. If it sees a resistance significantly higher than what it's looking for, it will initiate a trouble condition which will not clear until the trouble is corrected. Your control panel is looking for either 3.3K-ohms or 680 ohms resistance on that zone, depending on whether it has two-wire or 4-wire smoke detectors on it. The most common cause of a fire zone trouble is a loose or severed wire. Undoing wires in the control is kind of overkill and a marvelous opportunity to get wires mixed up.Īfter you've located the zone number of whatever zone your smoke detector is on, you can take off the wires for that zone loop in the control panel and check it with your multimeter. You should have a zone list somewhere but if you don't, read your user's manual and use the keypad to check the zone status of all zones. The last one, usually the fartherest from the control panel, will have only 2 or 4 wires connected, and will have an EOLR (End Of Line Resistor) for circuit supervision and possibly a power supervision module if it's a 4-wire detector. Each detector except for the last in the series will have either 4 or 8 wires attached: Two in and two out, or 4 in and 4 out. You need to know whether you have 2-or-4 wire detectors. You can have hardwired expansion zones, but the fire zone is usually one of the first 8, and most often zone 8, which supports 2-wire smoke detectors. Go to Google or your favorite search engine with the phrase "Caddx NX-8E Installation Manual." You can download it for free, ignore any pay-for-download sites.įirst of all: Your zones are numbered, 1 through 8 for on-board zones, higher for expansion zones. If that does't tell you what you need to know, then get the Installation Manual. The first thing you do with an alarm system trouble is read the User Manual/Owner's Manual. Kevin, STOP!! If it's not already too late, stop taking things apart and/or buying things you don't need.
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