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  1. #1
    Join Date
    Jul 2009
    Location
    new york
    Posts
    666

    AAON suction pressure

    Scroll on the aaon is going into a vacuum! I changed out the txv and filter drier and still seem to have restriction. Runs for 15 sec the cycles off. High side 185 . Might have ruined the the power head when brazing but wrappped it pretty well. What elese could it be?

  2. #2
    Join Date
    Sep 2006
    Location
    Ohio
    Posts
    496
    What kind of refrigerant, R-22 or R-410a. Did you weigh in the rated charge? Could be a restricted evap coil if the TXV is okay. Is the TXV frosting up or can you feel a temp drop anywhere on the liquid line. If it is going off in 15 sec, you can hold in the contactor for a short time to look for frost.

  3. #3
    Join Date
    Dec 2007
    Location
    houston, texas
    Posts
    3,787
    Quote Originally Posted by bwd111 View Post
    Might have ruined the the power head when brazing but wrappped it pretty well. What elese could it be?
    Your probably ok, have never had a problem with overheating the valve even though sometimes I was a little worried.

    How old is the unit? It's pretty hard to get a restriction in a 3/8 or larger size pipe. Does the compressor sound normal?
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