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  1. #1
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    Mitsubishi par 21 controller temp issue



    Hi all ... I'm attending site tomorrow to investigate a report that , the par 21 controllers are reading set point 21*c and room temp is also reading 21*c although people are complaint it's too hot in there . They have apparently got a thermoter in the room which is reading 25*c ......... How is this a possible problem ? Has anyone got any thoughts ?

    I'm visiting site first thing in morning to check this out .

    Thanks in advance

    Colin



  2. #2
    Brian_UK's Avatar
    Brian_UK is offline Moderator I am starting to push the Mods: of RE Site Moderator : and general nice guy
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    Re: Mitsubishi par 21 controller temp issue

    The possible problem sadly is the people in the office.

    Check the air filter otherwise lack of airflow can create problems.
    Brian - Newton Abbot, Devon, UK
    Retired March 2015

  3. #3
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    Re: Mitsubishi par 21 controller temp issue

    ....and if their thermometer is from the pound shop don't believe it's actually 21C in the office ��

  4. #4
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    Re: Mitsubishi par 21 controller temp issue

    enable the room sensor in the controller- if its within the conditioned space- u need to go in the setting mode- think its no02 3 from memory
    http://www.mediafire.com/view/iyxnw4...R-21MAA(2).pdf
    click on the link above- for manual

  5. #5
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    Re: Mitsubishi par 21 controller temp issue

    its not set at 21 heat is it?

  6. #6
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    Re: Mitsubishi par 21 controller temp issue

    Just an update for everyone .. The problem was simply that all units had there set points changed to read from the par21 controller , and all the controllers had been installed on cold exterior walls that had no insulation so by the time the wall temp had changed to 21*c, everyone under the grills had endured 40*c heat blasting on them for a few hours ....

    Removed the set points from controlers , Changed set point positions to read from more accurate places around the office using sensors ... Problem solved

    Thanks to all who posted

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