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  1. #1
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    Carrier RTU Question

    I am going to look at a Carrier 48TCED14A3A5-0A0A0 tomorrow. The issue is apparently the compressor is coming on and going off on high pressure continuously but no outdoor or indoor fan is coming on a cooling call. I haven't looked at it yet so I was hoping that someone here may have ran into this issue on this particular unit and could tell me a couple of things to look for before I climb up there. I find it kind of weird that both indoor and outdoor fans aren't coming on. Thanks!

  2. #2
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    Might be 2 different issues. Not much to those units. If I had to go out on a limb, I'd bet you have issues with overheated/melted wiring
    Officially, Down for the count

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  3. #3
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    Quote Originally Posted by 2sac View Post
    Might be 2 different issues. Not much to those units. If I had to go out on a limb, I'd bet you have issues with overheated/melted wiring
    I didn't think there's much to it. I mostly see Yorks around here.

  4. #4
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    Check your thermostat.

    Sent from my SM-G960U using Tapatalk

  5. #5
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    Quote Originally Posted by Spitz View Post
    Check your thermostat.

    Sent from my SM-G960U using Tapatalk
    I'll check it.

  6. #6
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    Not sure about the new units but the older ones if y2 was energized on the board the compressor would start. No indoor fan no condenser fans. Y1 would start the condenser fans. Indoor fans wont run without g energized.

    Sent from my SM-G960U using Tapatalk

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  8. #7
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    Quote Originally Posted by flanders View Post
    The issue is apparently the compressor is coming on and going off on high pressure continuously but no outdoor or indoor fan is coming on a cooling call.
    Let's assume that this is a no cooling call.

    How do you know the information stated above? Was there another tech from your co? A building maintenance guy?

    I am never handed info like that before I go to a call, so I am curious about the dynamic.....
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

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  9. #8
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    Quote Originally Posted by timebuilder View Post
    Let's assume that this is a no cooling call.

    How do you know the information stated above? Was there another tech from your co? A building maintenance guy?

    I am never handed info like that before I go to a call, so I am curious about the dynamic.....
    Son/ apprentice got his eyes (not hands) on it 1st.

  10. #9
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    Jump it out at the unit and see what gives

  11. #10
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    Three days later...an update?
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    2 Tim 3:16-17

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  12. #11
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    Quote Originally Posted by timebuilder View Post
    Three days later...an update?
    Went back the next day and it was running fine. I'm not sure what was going on but as of now it's operating normally.

  13. #12
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    If there is a smoke detector connected to the board SD terminals, that's your answer.
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

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  14. #13
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    Quote Originally Posted by timebuilder View Post
    If there is a smoke detector connected to the board SD terminals, that's your answer.
    Thanks for the info. I'll check it next time I'm out there.

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