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  1. 23-08-2007, 06:36 PM #1
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    kevingrange
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    Carrier Master Link II issue



    I've been working on a Carrier 50YZ packaged unit. It cycles on and off for about 2 minutes. I've tested all safety devices and the two fan motor thermal overloads, all are fine. It's got a Master Link II control board a MM195-BBx I think it is. I can't find a single bit of information on these, I've heard you have to configure these things for different units and they are well known for problems. Any help with a good resource on these things would be a great help.


  2. 23-08-2007, 11:59 PM #2
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    Re: Carrier Master Link II issue

    Sorry Kevin I can't find any of those models on the Carrier sites.

    I can find a Maestro control but that's as close as I can get
    Brian - Newton Abbot, Devon, UK
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  3. 24-08-2007, 11:56 PM #3
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    Re: Carrier Master Link II issue

    Well done Jollycold and thanks.

    Also, welcome to the forum.
    Brian - Newton Abbot, Devon, UK
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  4. 25-08-2007, 07:36 AM #4
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    Re: Carrier Master Link II issue

    Many thanks. What a load of ***** this bit of kit is. Don't go near one. I phoned carrier and they only made 2.
  5. 25-08-2007, 10:08 PM #5
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    Re: Carrier Master Link II issue

    Quote Originally Posted by kevingrange View Post
    Many thanks. What a load of ***** this bit of kit is. Don't go near one. I phoned carrier and they only made 2.
    ....and you just had to be the guy to find one of them
    Brian - Newton Abbot, Devon, UK
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  6. 26-08-2007, 12:33 AM #6
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    Re: Carrier Master Link II issue

    Some info from a large database for Carrier


    http://www.docs.hvacpartners.com/idc...ments/techlit/
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