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  1. #1

    Carrier 30RQ EXV problem

    Hi All. I have 30RQ120 Chiller with AquaSnap Control System.
    In cooling mode, the unit is working fine.
    In the heat pump:
    1. The unit starts up and gets into position EXV 27% and off for high pressure
    EXV on the sensor does not respond - only 27%
    I heated the sensor - no reaction - 27%
    and off for high pressure
    In what could be the reason?
    Thanks in advance for your help

  2. #2
    Join Date
    Feb 2007
    Location
    Georgia
    Posts
    167
    Removed sorry no *
    Last edited by steve wright; 01-06-2013 at 05:13 PM.

  3. #3
    Join Date
    Jan 2008
    Location
    Dallas ,Texas
    Posts
    3,724
    With that much info it is hard to troubleshoot it from the USA.

  4. #4
    Join Date
    Jul 2003
    Location
    Orange County N.Y.
    Posts
    1,176
    Quote Originally Posted by Absorber1981 View Post
    Hi All. I have 30RQ120 Chiller with AquaSnap Control System.
    In cooling mode, the unit is working fine.
    In the heat pump:
    1. The unit starts up and gets into position EXV 27% and off for high pressure
    EXV on the sensor does not respond - only 27%
    I heated the sensor - no reaction - 27%
    and off for high pressure
    In what could be the reason?
    Thanks in advance for your help
    Generally if you are only opening 27% and the unit is shutting off by high pressure safety then you have a pressure problem. Overcharge or no water flow.

    ...Ron
    Roof Rat

  5. #5
    Join Date
    Oct 2005
    Location
    Phoenix, Arizona
    Posts
    396
    You should be able to force the EXV open If you know how to put the system into test mode.
    RTFM!!!

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