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  1. #1

    10 TON CARRIER ISSUES

    Hi all,

    My name is Marc and I run a 4000 sq ft washateria with 2 ten ton Carrier split units. Units were installed last June and appeared to run perfectly. However, one of the units started shutting down and not coming back on everyday recently. I noticed that this only happens on days that outside temperatures are in the mid 90s. I have had 2 technicians from two different companies look at it with no results.
    One said that we are overworking the compressor and it shuts off as a safety measure and the other came out and put a wind baffle on top of unit. Of course those two charged me for their time with no results are I wouldn't be here now.

    My question is if we are overworking the unit why does one run fine and the other one shutting off when it gets hot. They are both located behind building about 20 ft from each other. These technicians aren't cheap. I don't mind paying to get the problem fixed but they are charging me and giving me no results. Can it be a defective compressor? Does anyone have any insight on this. I'm desparate for any help.

    Thanks in advance,
    Marc

  2. #2
    Join Date
    Oct 2012
    Posts
    3,577
    I will just ask the basic question first. So the units are a little over a year old, have the condenser coils been cleaned? I would think the techs would check this, but if it hasn't been done, a years worth of dirt is enough to cause problems. Also, I'm sure you have, but has the air filter(s) been changed recently.

  3. #3
    Quote Originally Posted by Mike19 View Post
    I will just ask the basic question first. So the units are a little over a year old, have the condenser coils been cleaned? I would think the techs would check this, but if it hasn't been done, a years worth of dirt is enough to cause problems. Also, I'm sure you have, but has the air filter(s) been changed recently.
    All filters have been changed and all coils cleaned. system shuts off and doesn't come back on. I would have to flip breaker off and on for it to come back on. but the breaker isn't tripped.

  4. #4
    Join Date
    Nov 2007
    Location
    Mississippi
    Posts
    1,338
    Do your dryers vent to the roof? Possibly split coil condensers? I'd call the techs that worked on unit and ask them what was the refrigerant pressures.

  5. #5
    Join Date
    Oct 2012
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    3,577
    Quote Originally Posted by oceanwash View Post
    All filters have been changed and all coils cleaned. system shuts off and doesn't come back on. I would have to flip breaker off and on for it to come back on. but the breaker isn't tripped.
    If your compressor stops running or shuts down on one of the safety devices (high pressure, low pressure, etc..) it will "lock out", and by you turning the breaker off and back on you where resetting it.

    Just out of curiosity, whats a washateria. What do you keep the inside temperature set at?

  6. #6
    As a matter of fact that's the first thing that we did before we called the professionals. The vents were pointed directly at the unit so we turned them upwards and extended the vents another four feet so that they were past the roof. That didn't seem to help. Both technicians checked all pressures and said everything was good.

  7. #7
    Quote Originally Posted by Mike19 View Post
    If your compressor stops running or shuts down on one of the safety devices (high pressure, low pressure, etc..) it will "lock out", and by you turning the breaker off and back on you where resetting it.

    Just out of curiosity, whats a washateria. What do you keep the inside temperature set at?
    I keep both thermostats and 76. And have even installed 10 ceiling fans last month. We call it a washateria down here but its a Laundromat with about 50 commercial dryers.

  8. #8
    Here is what has been done so far since we been having problems.

    replace all filters including the 2" filters located inside the air handler in the attic.
    turned dryer vents to point upward and extended them above the roof.
    installed 10 ceiling fans.

    Again these units are identical and are located withing 20' of each other.
    Yet one runs fine and the other shuts off when it gets hot outside.

  9. #9
    Join Date
    Sep 2008
    Location
    Western PA
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    25,579

  10. #10
    Join Date
    Nov 2006
    Location
    Southeastern Pa
    Posts
    18,401
    Time to call a company that understands these units.
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist

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  11. #11
    Join Date
    Nov 2006
    Location
    Southeastern Pa
    Posts
    18,401
    Beenthere, you were moving it while I was requesting. Good job!!!
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist

    AOP Forum Rules:







  12. #12
    Join Date
    Oct 2012
    Posts
    3,577
    Did the first technician give any indication of how he thought you where overworking the compressor? You most likely would have to have a pretty substantial problem for the compressor to get "overworked".

    What did the other tech feel the need for the wind baffle was? Bad airflow area? Recirculation of air?

    Is either of these companies the dealer whom installed the units originally? A Carrier dealer may be more familiar with them.

  13. #13
    Join Date
    Nov 2007
    Location
    Mississippi
    Posts
    1,338
    Installation of wind baffle sounds like high head to me.

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