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New Kit - Selftest fail at Front print fan
 
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New Kit - Selftest fail at Front print fan  

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azimbelm
 azimbelm
(@azimbelm)
New Member
New Kit - Selftest fail at Front print fan

Hi,
I have built the MK3 and started with the Wizard.
The Selftest fails when testing the Front print fan - Wiring error.
The strange thing is:
When the printer boots up, both fans spin for a few moments and they both sound normal.
But in selftest mode, the front fan spins up and start with a strange sound - like the bearings are bad.

  • I can spin the fan freely by hand, no suspicious things.

  • I also tried to remove the fan completely from the construction to ensure that no screws or uneven pressures are interfering.

  • Checked wiring (correct conector)

  • Checked cables (cables seem not to be damaged, resistance of 1.8 Ohm on all three wires from the fan PCB to the Connector on the cable.)

    • Thanks for the help

    Posted : 21/04/2018 8:56 pm
    thrawn86
     thrawn86
    (@thrawn86)
    Honorable Member
    Re: New Kit - Selftest fail at Front print fan

    can you spin it up with gcode or pronterface/s3d/octoprint? support will easily replace a fan if its bad.

    Posted : 21/04/2018 10:10 pm
    azimbelm
     azimbelm
    (@azimbelm)
    New Member
    Topic starter answered:
    Re: New Kit - Selftest fail at Front print fan

    I think there is something wrong with the fan.
    I can start it up via the Printer menu, it starts spinning when the value is about 32-35, then with some kind of whining. The whining finally disappears 245-255.
    When I start a print (Prusa Logo, whistle, etc.) the first layer has the fan deactivated and when the second layer begins, the fan starts, the layer is going to be printed and then the print is aborted because of a fan error.

    I think I have to contact support.

    Posted : 22/04/2018 12:07 am
    Madvih
     Madvih
    (@madvih)
    New Member
    RE: New Kit - Selftest fail at Front print fan

    @adrian-z3

    Hi, I have a similar problem, after assembly my MK3S selftest failed for front printer fan. Fan spins every time ok, even if I select spinning manualy through LCD menu, everything is fine, just the selftest fail every time on this step.

    I tried to move the cables, checking connectors and even factory reset. Only thing what works for me, is to TURN OFF error fan check. Then I was able to print.

    Posted : 23/09/2019 6:56 am
    rmm200
     rmm200
    (@rmm200)
    Noble Member
    RE: New Kit - Selftest fail at Front print fan

    Click on EShop, then Chat in lower right.

    That will get you to Support - and they can help you.

     

    Posted : 23/09/2019 5:32 pm
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