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  1. #1
    Join Date
    Mar 2012
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    frost on compressor



    HI,

    I have a carrier primeline 69NT40-561 scroll compressor
    compressor was covered with frost and pulled down temp at -15C only
    supply temp and return temp sometimes equalizes
    2 alarms flashes on the screen
    alarm 67 and 66
    anyone willing to share idea on this problem

    thanks



  2. #2
    Join Date
    Feb 2007
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    UK
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    Re: frost on compressor

    If the compressor itself is "covered with frost" then you haven't got enough superheat, check super heat and adjust/replace TEV/EEV/metering device as neccessary.



    .

  3. #3
    Brian_UK's Avatar
    Brian_UK is online now Moderator I am starting to push the Mods: of RE Site Moderator : and general nice guy
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    Re: frost on compressor

    I see that your areas humidity is between 45% to 80%, with a -15C suction temperature you would expect some frosting on the cold surfaces.
    Brian - Newton Abbot, Devon, UK
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  4. #4
    Join Date
    May 2011
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    India
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    Re: frost on compressor

    Even -15 degree C suction temperature indicates that there is a chance of liquid refrfigerent being sucked in... Better check the load and refrigerent superheat, else you will end up killing the compressor.

  5. #5
    Join Date
    Aug 2006
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    england
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    Re: frost on compressor

    Air flow across evaporator? No load on a system will result in low superheat and possible frosting on compressor body.
    Mostly found in Oxfordshire, UK :)

  6. #6
    Join Date
    Jan 2008
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    north west
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    Re: frost on compressor

    Frosting on the compressor can also be caused by over charged with refrigerant.

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