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  1. #1
    Join Date
    Feb 2011
    Location
    OH
    Posts
    149

    server room troubles

    have a mitsubishi muya24na that when it ramps it at 70# gradualy goes to 140 sh 20 hp allway stays at 290 sc 5 amps on start up 6.7 goes as high as 7.5 out side temp 75 indoor 80 .when i first got there it was runing low .pulled disconect which then started the above .this has r410a this unit has inverter and electronic txv

  2. #2
    Join Date
    Apr 2007
    Location
    Pa
    Posts
    758
    youre saying 140 degrees super heat?
    290 degrees sub cooling?
    20 horse power?

  3. #3
    Join Date
    Nov 2007
    Location
    Mississippi
    Posts
    1,338
    Quote Originally Posted by HvAckid82 View Post
    youre saying 140 degrees super heat?
    290 degrees sub cooling?
    20 horse power?
    I agree kid. That is about as clear as mud.

  4. #4
    Join Date
    Aug 2009
    Location
    Fort Lauderdale Fl
    Posts
    282
    I think he is saying sh is 20. High pressure is 290

    Sent from my SPH-D710 using Tapatalk

  5. #5
    Join Date
    Apr 2007
    Location
    Pa
    Posts
    758
    If he does have those readings I want to see it! What's is the highest subcooling youve ever seen? Not trying to hijack the thread.

  6. #6
    Join Date
    Sep 2007
    Location
    State College, PA
    Posts
    1,055
    Quote Originally Posted by david chamberla View Post
    have a mitsubishi muya24na that when it ramps it at 70# gradualy goes to 140 sh 20 hp allway stays at 290 sc 5 amps on start up 6.7 goes as high as 7.5 out side temp 75 indoor 80 .when i first got there it was runing low .pulled disconect which then started the above .this has r410a this unit has inverter and electronic txv

    If you have any question on charge on a ductless, pull the charge and weigh it back in. You can not diagnose a mini-split like you can a conventional system. They are not the same and do not work the same.
    Can someone please explain to me -
    Why is there never enough time to do it right the first time, but plenty of time to do it twice?


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  7. #7
    Join Date
    Feb 2011
    Location
    OH
    Posts
    149
    Quote Originally Posted by HvAckid82 View Post
    youre saying 140 degrees super heat?
    290 degrees sub cooling?
    20 horse power?
    wow suction psi starts at 70 pounds than goes to140 after it ramps up supper heat 20 deg .head psi stays at 290 psi subcool 5 .is clear as mud iam old school like to abrevate spelling allways funny but work gets done . having fun yet. allways i was actually wondering if any teck has had problems with inverter or comps . would this cause those readings 'i waighed in r410 .

  8. #8
    Join Date
    Jun 2008
    Posts
    35
    I agree. The only way to know for sure if it is charged correctly is to remove the charge and weigh it.

  9. #9
    Join Date
    Feb 2011
    Location
    OH
    Posts
    149
    thank you invertor was speeding up to compensate for refrigerant waighed out charge was short waighed back in .got up and running ,went back to leack search found leak in evaperator ,its on the way only 3 y old .

  10. #10
    Join Date
    Sep 2007
    Location
    State College, PA
    Posts
    1,055
    Quote Originally Posted by david chamberla View Post
    thank you invertor was speeding up to compensate for refrigerant waighed out charge was short waighed back in .got up and running ,went back to leack search found leak in evaperator ,its on the way only 3 y old .
    Glad to see you got it figured out.

    Good job!
    Can someone please explain to me -
    Why is there never enough time to do it right the first time, but plenty of time to do it twice?


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