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Thread: mcquay AGS320B

  1. #1
    Join Date
    Jul 2012
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    mcquay AGS320B

    having low discharge superheat problems,the circuit will load to about 70% the dsh will drop and will unload. Checked all temp&pressure sensors. Need some help with this problem,

  2. #2
    Join Date
    Apr 2012
    Paper Street Soap Company
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    Low discharge superheat typically means your bringing back liquid to the compressor.

    In your case it's probably a bad sensor unless you can verify EXV operation isnt controlling superheat correctly.

  3. #3
    Join Date
    Feb 2003
    Wichita Ks
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    it is not uncommon for the exv to hang up during operation. pull each temp sensor and compare with an accurate thermometer, I will use a cup of water and see if it reads right. also check ball valve for oil skimmer line, if open all the way back it off about half.

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