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  1. #40
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    Quote Originally Posted by Snapperhead View Post
    Dam I bet that took a few minutes to figure out
    Lol.. but I still remember the customers name, street, and I could probably pick out the house. What we call, a lasting impression.
    "If you can’t describe what you are doing as a process, you don’t know what you are doing." ~ W. Edwards Deming

    All those who wander..are not lost.

    Do NOT..mistake my kindness for weakness.

    The early bird may get the worm..but the second mouse gets the cheese.

  2. #41
    Join Date
    Sep 2002
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    Virginia
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    Quote Originally Posted by Lickety-Split View Post
    And how should I begin looking for the 24 volts without any of these wires connected to the terminal block on this RTU?
    Since the contactors go on and off erratically, its probly gonna be hard to find. I would remove 3 ph power from Compressor , then crank up unit ( hoping the fans would come on ) and begin wiggling , and unhooking stuff on low volt wires until the fans quit

    It might even be the 'board' causing the strange stuff

    Look on the back of board for spider web or something funky...

  3. #42
    Join Date
    Nov 2006
    Location
    Southeastern Pa
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    If you eliminate damage or some other issue with the wiring from the board to the contactors, the reason could be the board itself.

    Make sure that all of the connections to the board that are intentional grounds (used to power board logic) are solidly connected. If the board does not have a continuous 24 volt common for its on board DC power supply, you can get all kinds of crazy activity.

    Study the schematic to look for all of those connections, and make sure they are 100% good.

    An example of this is the Carrier gas pack board. If you were to look closely at the lower right hand corner, there is a black square around the metal standoff that tells you there MUST be a ground screw there. It is the one screw that Carrier says cannot be left out.

    Check those connections before condemning the board.
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist
    Member, IAEI

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  4. #43
    Join Date
    Jan 2019
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    Thread Starter
    No board,just a whole lot of relays

  5. #44
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    Jan 2019
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    Thread Starter
    They have these gas reheat relays for dehumidification.
    So with this cold weather...Im gonna have to check the crankcase heater. This could have taken out the compressor.
    Come to find out...it can run AC in the winter for dehumidification,then it will heat.

  6. #45
    Join Date
    Nov 2006
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    Southeastern Pa
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    Quote Originally Posted by Lickety-Split View Post
    No board,just a whole lot of relays
    Commander James Montgomery Scott:

    https://www.youtube.com/watch?v=T2NsTi_43g4
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist
    Member, IAEI

    AOP Forum Rules:







  7. #46
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    Jan 2019
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    Thread Starter
    Quote Originally Posted by timebuilder View Post
    Commander James Montgomery Scott:

    https://www.youtube.com/watch?v=T2NsTi_43g4
    Ha! True that

  8. #47
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    Aug 2002
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    Southold, NY
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  9. #48
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    Jan 2019
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    Thread Starter
    Quote Originally Posted by pecmsg View Post
    Thanks! Good stuff!

  10. #49
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    Jan 2019
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    Thread Starter
    Quote Originally Posted by pecmsg View Post
    And by the way...I want to openly apologize for unrighfully accusing you of being a jerk in front of all that are reading this. I was wrong and feel stupid for trusting some cheap needle-like leads...against a professional like yourself. I have had a lot of things going on and was stressed. I feel bad and apologize!

  11. Likes lions_lair, beenthere, icy78 liked this post
  12. #50
    Join Date
    Aug 2002
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    Quote Originally Posted by Lickety-Split View Post
    And by the way...I want to openly apologize for unrighfully accusing you of being a jerk in front of all that are reading this. I was wrong and feel stupid for trusting some cheap needle-like leads...against a professional like yourself. I have had a lot of things going on and was stressed. I feel bad and apologize!

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