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Thread: Backwards ?..

  1. #1
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    Backwards ?..

    Came across a no cooling serv call today older trane split condenser fan running backwards capacitor looked like it ate a watermelon replaced cap and fan ran in right direction, I've never seen a bad cap make it run in reverse,

  2. #2
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    did you have some recent storms?

  3. #3
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    Jan 2013
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    No storms

  4. #4
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    I have seen that before if the blade is already going it will just take off in that direction.

  5. #5
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    Shorted capacitors do that sometimes.

    PHM
    -------






    Quote Originally Posted by Mr toon View Post
    Came across a no cooling serv call today older trane split condenser fan running backwards capacitor looked like it ate a watermelon replaced cap and fan ran in right direction, I've never seen a bad cap make it run in reverse,
    PHM
    --------
    The conventional view serves to protect us from the painful job of thinking.

  6. #6
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    Never seen this before was kind of baffled

  7. #7
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    Without the phasing of the cap, the motor doesn't know which way to start.

    You could have hand turned it the other direction just before starting it and it would have turned in that direction.

  8. #8
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    Jun 2011
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    The shorted cap can cause the winding go out of phase. The poles will buck back and the shaft can spin backwards. The motor wont run correctly, usually to slow and sometime it will sound odd too, but it is believable.
    The only true knowledge is the pursuit of knowledge

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