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  1. #1
    Join Date
    May 2003
    Location
    El Paso, TX
    Posts
    159

    Hmm Compressor overload opening after 20 minutes?

    Am. Std. CU- M# TTA120A400BC S# N3146DHAH
    A/H M# TWE120A300CA S# N27105E5H
    Compressor overload opening after 20 minutes of operation; ambient 85º
    Suc.- 63 psi @39 SAT
    line temp 69º SH 30º
    Liq.- 212 psi @ 106º SAT
    Line temp 96º SC 10º
    Sup 65º Ret 78º WB 69º
    COOL

  2. #2
    Join Date
    Oct 2010
    Location
    oklahoma city
    Posts
    57
    What is the amp draw? The overload will open if the current is to high. It could be any of the electrical components, or wiring, that are causing your problem.

    Edit: I re-read the rules, and might not be allowed to post, but the question was asked by an authorized Pro, and my advise was vague...??? Delete if I'm breaking the rules.

  3. #3
    Join Date
    Mar 2007
    Location
    NW AR
    Posts
    2,478
    Yea you need to check your amp draw. Your pressures are temps are fair. Possibly run capacitor. If unit has a start capacitor that will get it running but if the run is bad it will be over amping and getting hot.

  4. #4
    Join Date
    Sep 2008
    Location
    Western PA
    Posts
    25,787

  5. #5
    Join Date
    Dec 2003
    Location
    Northern VA
    Posts
    622
    How is the oil doing?
    "Iron sharpeneth iron..."

  6. #6
    Join Date
    May 2003
    Location
    Charleston SC
    Posts
    123
    Check the contactor, if the contacts are bad you can get a current imbalance between phases in the compressor motor-causing overheating.
    Coolairman

  7. #7
    Seems like you're low on charge or have a restriction. SH of 30 is a little high. With those readings, your target SH should be about 19 degrees. SH too high will make the compressor run hot. Also check your temp split across your liquid drier to make sure there's no restriction. If it has a txv see what happens if you bring your SC up to 15

  8. #8
    Join Date
    Jul 2009
    Location
    Columbia, MD
    Posts
    4,275
    I agree with him ^^^

    High superheat will cause an overload. That unit is most likely a TXV. See if you can check pressure drop across the drier. Trane uses a small drier which will clog up.

  9. #9
    Join Date
    Nov 2009
    Location
    Richmond, working under tarps
    Posts
    504
    Quote Originally Posted by dukes13 View Post
    Am. Std. CU- M# TTA120A400BC S# N3146DHAH
    A/H M# TWE120A300CA S# N27105E5H
    Compressor overload opening after 20 minutes of operation; ambient 85º
    Suc.- 63 psi @39 SAT
    line temp 69º SH 30º
    Liq.- 212 psi @ 106º SAT
    Line temp 96º SC 10º
    Sup 65º Ret 78º WB 69º
    Is the return gas temp at compressor 69deg F?

  10. #10
    Join Date
    May 2003
    Location
    El Paso, TX
    Posts
    159
    It was a TXV restriction, tkx for replys.
    COOL

  11. #11
    Join Date
    Aug 2012
    Posts
    2,686
    txv and tkx's im so confused.
    Glad it worked out.

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