Can I bypass fan VIN?



  • Hi, recently my fans are not working on my Duet2 wifi board. I check the continuity between VIN and VIN on the jumper selection under fans connectors and they are not connect to each other.

    Can I solder a wire between this 2 points? And Am I still be able to control the fan speed?

    Thank you.


  • Moderator

    @underpk Have you checked the fan fuse? It’s the one closest to the VIN terminals, if you have a Duet WiFi 1.03 or newer.

    Ian



  • @droftarts hi, I have already check and it work properly (check from VIN to both fuse leg)



  • May I suggest that you PULL the fuse and measure it instead of trying to measure in circuit ?



  • @underpk said in Can I bypass fan VIN?:

    Can I solder a wire between this 2 points? And Am I still be able to control the fan speed?

    you can, and if nothing else is damaged you'll be able to control the speed as the speed control is done one the negative side - but it'd be far more advisable to find out what went wrong to avoid any more damage potentially.


  • administrators

    @underpk said in Can I bypass fan VIN?:

    Hi, recently my fans are not working on my Duet2 wifi board. I check the continuity between VIN and VIN on the jumper selection under fans connectors and they are not connect to each other.

    If your Duet is recent enough to have a fan fuse, that's unusual, because the fuse should protect the PCB traces.

    I suggest you use your multimeter to trace between +VIN and the fan fuse, and between the fan fuse and the VNINpin on the fan voltage select jumper; then bypass whichever of those traces has failed.


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