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    Blown fuse, board acting strangely

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    • p40whkundefined
      p40whk
      last edited by

      So I made a huge error and accidentally reversed the positive and ground wires when I was hooking up my Duet 2 WiFi. Needless to say both the 1 amp and 7.5 amp fuses blew.

      I replaced those fuses and the board starts okay, I can home axis' as well as turn on the heaters but the Always On fans do not work. When I run the "test Fans" Macro, nothing happens. The Hotend fan will come on when it gets to temp as specified in my G-code but the macro and the always on fan no longer works. (the macro will work for the hot end fan if it's already running)

      Is there anyway to test if I have damaged my board?

      Also, I tried to run the Test Heaters Macro and received the following error:

      0_1548004166925_Capture.JPG

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      • dc42undefined
        dc42 administrators
        last edited by dc42

        The reversed polarity may have damaged the fans before the 1A fuse blew. Are you sure that the 1A fuse hasn't blown again? Do the fans work if you connect them directly to the PSU, assuming they are the correct voltage to do that?

        You are running an obsolete version of DWC.

        Duet WiFi hardware designer and firmware engineer
        Please do not ask me for Duet support via PM or email, use the forum
        http://www.escher3d.com, https://miscsolutions.wordpress.com

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        • p40whkundefined
          p40whk
          last edited by

          Thanks dc42,

          I went back and did some troubleshooting and found that I had over crimped the fan connector and broken the wires, my ohm meter showed no continuity.

          So I hooked up a fan that I knew was good and it is working. I'll update my firmware and run the fan test again.

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