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  1. #1
    Join Date
    Oct 2012
    Location
    Danielsville, PA
    Posts
    6

    Default MM175 doesn't power up.

    Hi, I'm new to welding, I just finished setting up my used MM175. I plugged the machine in and turned it on just to see if the feed rollers would turn. After pushing the switch to turn the machine on it remained dead. I checked the voltage at the outlet and that is correct across the 2 hot lines, there is power to the reset on both legs. I have no lights on the circuit board (green & red) if anyone has any idea what could be wrong I'd appreciate hearing from you, thankyou.

  2. #2
    Join Date
    Oct 2004
    Location
    Edmonton, Alberta
    Posts
    7,615

    Default

    Unit has a transformer/fan motor, what happens even out of the box the wires to that transformer, come loose. Very popular problem with this type of setup.

  3. #3
    Join Date
    Oct 2012
    Location
    Danielsville, PA
    Posts
    6

    Default

    Quote Originally Posted by cruizer View Post
    Unit has a transformer/fan motor, what happens even out of the box the wires to that transformer, come loose. Very popular problem with this type of setup.
    I failed to mention I did check connections, perhaps not good enough, I'll have to recheck them again.

  4. #4
    Join Date
    Oct 2004
    Location
    Edmonton, Alberta
    Posts
    7,615

    Default

    You didn't check the connections at the fan motor, I bet, 2 wires to run the fan motor and 2 to power everything else

  5. #5
    Join Date
    Oct 2012
    Location
    Danielsville, PA
    Posts
    6

    Default

    Quote Originally Posted by cruizer View Post
    You didn't check the connections at the fan motor, I bet, 2 wires to run the fan motor and 2 to power everything else
    Unfortunately I did check everyone of the connections. At this point I'm figuring its the circuit board.

  6. #6
    Join Date
    Oct 2004
    Location
    Edmonton, Alberta
    Posts
    7,615

    Default

    NO lights, means no power, merely check for 24VAC on the 2 white leads comming off that fan motor. Bet its that unit, very common for failure there,

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