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  1. #1
    Join Date
    Oct 2019
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    Trane XL16 Heatpump problem

    2010 5 ton xl16 heatpump model #4TWX6060E1000AA that is short cycling in heating mode, kicking out on high pressure. Cooling mode cools perfect but has a high subcool at 20 superheat at 3 degrees. Have tested out eev board and everything seems to be operating correctly. Scratching my head on this one, I dont normally work on many trane units unless its changing them out for something else. Any input or suggestions would be greatly appreciated.

  2. #2
    Join Date
    Sep 2002
    Location
    Virginia
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    6,786
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    Take SC at indoor unit

    Sounds like not enough air moving

  3. #3
    Join Date
    Jan 2012
    Location
    Missouri, USA
    Posts
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    Verify indoor airflow, was the 20 sc in cool mode? Sounds overcharged.

  4. #4
    Join Date
    Oct 2019
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    2
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    Thread Starter
    Quote Originally Posted by ksefan View Post
    Verify indoor airflow, was the 20 sc in cool mode? Sounds overcharged.
    Was overcharged, and no expansion valve in new goodman air handler. Company that installed indoor unit got it running to cool and didnt worry about heating.

  5. #5
    Join Date
    Jan 2012
    Location
    Missouri, USA
    Posts
    1,530
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    Probably had a leak in the expensive Trane evaporator, now they got a pos Frankenstein. Still better that a Goodman matched system.

  6. #6
    Join Date
    Dec 2007
    Posts
    9,412
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    Provide numbers that would help us help you.
    Indoor temp
    Outdoor temp
    Airflow
    Metering devices(you say no indoor expansion valve, so piston inside?)
    Mode of operation numbers were taken in
    Indoor unit info
    Indoor coil info

    Is it wired correctly? Trane has some different wiring compared to most mfrs.
    The Food Stamp Program, administered by the U.S. Department of Agriculture, is proud to be distributing the greatest amount of free meals and stamps EVER.
    Meanwhile, the National Park Service, administered by the U.S. Department of the Interior, asks us to "Please Do Not Feed the Animals". Their stated reason for this policy "... the animals become dependent on handouts and will not learn to take care of themselves."
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  7. #7
    Join Date
    Dec 2002
    Location
    in a house, Appomattox, Va.
    Posts
    4,754
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    mismatched system is crap shoot. first sounds like overcharge in cooling, 16i usually ran 6-12 sc and 15-18 sh.

    have seen mismatched systems where there is no winning on charge, not enough to cool gets heat. enough to cool kicks psi switch in heat.
    Col 3:23


    questions asked, answers received, ignorance abated

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