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  1. 06-14-2008, 09:22 PM #1
    whitepoundog
    whitepoundog is offline Professional Member
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    PSC motor just reversed

    Okay, I am sure at somepoint I knew the answer to this once but my mind ain't what it used to be. Here goes. Why does a PSC motor sometimes just reverse. Capacitor is still good but the motor just reverses. What is the technical reason this happens?
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  2. 06-14-2008, 09:27 PM #2
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    sparks
    sparks is offline Professional Member
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    I've seen them reverse only on a weak or bad cap or "windmilling" in the case of a condensor fan.

    If the cap is weak it will start in whatever direction "external" forces pull it.
    Last edited by sparks; 06-14-2008 at 09:34 PM.
    Sometimes when I consider what tremendous consequences come from little things, I am tempted to think there are no little things!
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  3. 06-14-2008, 09:37 PM #3
    whitepoundog
    whitepoundog is offline Professional Member
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    That is usually how it goes. Two jobs I have seen the cap was checked (OK) then swapped out because I never trust my MF meter. Still the motor was reversed. Wiring was correct and volts normal.
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