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Discussion in 'Power Electronics' started by Leslie28, Jan 24, 2020.

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  1. Leslie28


    Jan 24, 2020
    so i have changed my PSU fan to bigger PC fans for my ant miner's power supply, i had 2 fans wired up to it working good,
    then i had to move the power supply and all my weires ripped out of the plugin addapter that plugs into the MOBO of the power supply,

    this fan header has 4 wires RED BLACK BLUE YELLOW
    i have no idea what wire does what, but my power supply just gives me a yellow light anyway i try to congigure the wires up with the 2 fans,

    it only works with 2 fans connected also not sure why..

    if someone can understand where im coming from please help?

    or anyway t o bypass the blue and yellow wires so my power supply works?
  2. bertus

    bertus Moderator

    Nov 8, 2019

    The 4 wire fans will likely have the following signals GND, + 12 V , PWM and TACH:
    It can be that the powersupply checks the TACH signal on both fans.
    Possibly when one of the TACH signals is missing, the powersupply goes into protection and stops working.

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