window sensor problem

Discussion in 'Security Alarms' started by smithsonga, Dec 17, 2004.

  1. smithsonga

    smithsonga Guest

    Hello
    I have a ITI concord express system in my home. My windows are all
    hardwired with magnetic sensors.(I believe magnetic?). One of my
    windows was starting to false chime...the system showing it was opened
    when it was not. It was steadily getting worse. I popped the sensor
    and one of the two wires to the sensor fell out of the crimp. I was
    pleased as the fix seemed obvious. I restripped the wires and
    reattached. Put it back in the window but now the system never shows
    the window closed. I even tried putting the two wires together to
    close the circuit, did nothing.

    I did feel a slight tinkling feeling of low voltage when I first
    restripped the wires...I did not unplug nor did I consider unplugging
    the main system prior to doing this.

    What else could be wrong? Why would this sensor suddenly stop working?
    I dont have an installation manual for this system, only the user
    guide.

    Any help or troubleshooting would be appreciated-
    Thanks
    Jim
    smithsonga, Dec 17, 2004
    #1
  2. smithsonga

    alarman Guest

    smithsonga <> wrote in message
    news:...
    > Hello
    > I have a ITI concord express system in my home. My windows are all
    > hardwired with magnetic sensors.(I believe magnetic?). One of my
    > windows was starting to false chime...the system showing it was opened
    > when it was not. It was steadily getting worse. I popped the sensor
    > and one of the two wires to the sensor fell out of the crimp. I was
    > pleased as the fix seemed obvious. I restripped the wires and
    > reattached. Put it back in the window but now the system never shows
    > the window closed. I even tried putting the two wires together to
    > close the circuit, did nothing.
    >
    > I did feel a slight tinkling feeling of low voltage when I first
    > restripped the wires...I did not unplug nor did I consider unplugging
    > the main system prior to doing this.
    >
    > What else could be wrong? Why would this sensor suddenly stop working?
    > I dont have an installation manual for this system, only the user
    > guide.


    You may have eliminated an end of line resistor. Try putting one in the
    circuit. The diagram inside the control panel may show the value.
    js
    alarman, Dec 17, 2004
    #2
  3. smithsonga

    smithsonga Guest

    Ok, first when I say popped the sensor...I only mean pulled it out of
    the 1/2" hole in the window sill. I didnt damage the sensor itself.

    Regarding the resistor, there was no resistor there before, just the
    small wire that pulled from the crimp. I can see that it is wired in
    series with the window next to it...and when I look at another room's
    windows, the sensors look to be wired in the same manner.

    Regarding the chewed wire, it goes straight down to my basement, I see
    no issue.

    Lets review however: The sensor was working but that zone kept chiming
    as if it was opening (once a week at first and now every 1-2
    mins)...there are 4 windows in the zone, I checked all. This last
    window appeared to be an issue as the wire fell out of the crimp. I
    reattached, but now the zone doesnt close at all. In non of the
    windows do I see resistors...I do see resistors in the box downstairs,
    but it is a jumbled wire mess and the installer recently checked it out
    OK. This 'installer' will not come out again, as I am experienced
    DIY'r, I am trying to fix it myself.

    Do I go and restrip and attach all wires in all those 4 windows just in
    case? Do I go get another sensor from another zone and swap with this
    particular window to verify it isnt the sensor?

    Thanks!
    Jim
    smithsonga, Dec 17, 2004
    #3
  4. smithsonga

    smithsonga Guest

    Ok, I already tied the two wires at this window together and it did not
    close the circuit. I will go to each of the 4 sensors and try the
    same.

    If wiring the entire zone together without sensors and the zone is
    still open, that concludes a break in the wire somewhere, correct?

    but if it is closed, I can put each sensor in one at a time to find the
    bad one.

    Are these available online somewhere?

    Thanks-
    smithsonga, Dec 17, 2004
    #4
  5. > Remove the switch that you repaired, put a
    > meter on it and use the magnet to see if it
    > really is closing. You may have a bad or
    > intermittant switch or the magnet may not
    > be line up.


    Also note that you can sometimes damage the internal contact during removal.
    The damage may not be visible from the outside. It's also possible that the
    sensor was failing and has now completely failed, all with no externally
    visible indication of a problem. For these reasons it's a good idea to
    remove the sensor from the circuit and verify operation with a meter.

    --

    Regards,
    Robert L Bass

    =============================>
    Bass Home Electronics
    2291 Pine View Circle
    Sarasota · Florida · 34231
    877-722-8900 Sales & Tech Support
    http://www.bassburglaralarms.com
    =============================>
    Robert L. Bass, Dec 17, 2004
    #5
  6. smithsonga

    smithsonga Guest

    Ok, I fixed this problem. I went to each sensor and a 2nd sensor had a
    very loose wire...two in one zone!
    Makes me want to check each window in the house...but I guess if there
    is no problem at this time, dont bother with it.

    Thanks everyone-
    Jim
    smithsonga, Dec 22, 2004
    #6
  7. smithsonga

    Frank Olson Guest

    "Alarminex" <> wrote in message
    news:...
    > In article <>,
    > "smithsonga" <> writes:
    >
    > >Subject: Re: window sensor problem
    > >From: "smithsonga" <>
    > >Date: 21 Dec 2004 16:28:23 -0800
    > >
    > >Ok, I fixed this problem. I went to each sensor and a 2nd sensor had a
    > >very loose wire...two in one zone!
    > >Makes me want to check each window in the house...but I guess if there
    > >is no problem at this time, dont bother with it.
    > >
    > >Thanks everyone-
    > >Jim
    > >

    >
    > If you've got a half way decent Volt/ohm meter you could try doing a

    "rattle"
    > test.


    Where do *you* get your rattles?? Personally I like "Baby's R Us".

    Sorry Jim; I just couldn't help myself! :))
    Frank Olson, Dec 23, 2004
    #7

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