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What Does an "AC PreCharge Fault" Mean?

Discussion in 'Prius PHEV Plug-In Modifications' started by kilimar, Dec 19, 2016.

  1. kilimar

    kilimar Junior Member

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    So... I just spent 10-15 trying to figure out why my HyMotion pack stopped charging... saw that it was flashing/blink 7 times. Which is a "AC PreCharge Fault" -- but I can't figure out what that means from the manual.

    Does anyone know?

    Thanks,

    -d
     
    #1 kilimar, Dec 19, 2016
  2. mrbigh

    mrbigh Prius Absolutum Dominium

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    Pre charge is being used at initial AC or DC turn on to avoid a a sudden spike of electricity in to an electrical circuit,
    Usually is composed with a suitable relay and a charge resistor.
    Also is called " Soft start circuit".
     
    #2 mrbigh, Dec 20, 2016
  3. kilimar

    kilimar Junior Member

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    So does that mean the relay and/or charge resistor is bad?
     
    #3 kilimar, Dec 21, 2016
  4. mrbigh

    mrbigh Prius Absolutum Dominium

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    It is related to the precharge circuit by itself.
    t could be an auxiliary electrical branch that powers a " timer circuit", a "driver circuit" or the power "soft start" initiating it's job.
    With out an schematic would be a little difficult to identify nor that the equipment error code will tell you much more.
    It is needed some body with the experience on this Hymotion's equipment to go further.
     
    #4 mrbigh, Dec 21, 2016
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