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Understanding air conditioner PSU logic

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    #21
    Re: Understanding air conditioner PSU logic

    I don't know how you checked E3 but I would replace it. If it is dried out (very likely) it will not charge to sustain the ic's vcc.
    Check to make sure M1 is not shorted D~S, Also Check that IC8 (mosfet) on the module board is not shorted.

    I will also ask again: Did you replace the module board and if not, what was shorted?
    Last edited by R_J; 11-28-2022, 05:26 PM.

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