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5 flashing lights  

New Member
5 flashing lights

Hi all,

I'm new to the Prusa world, but I need to become an expert for my job. We have the MK3S and the MMU2s kit that was installed before I got here. For the life of me I couldn't get the MMU to load and print. So I took it off and was able to print different materials without the MMU just fine, so the problem is with the MMU and not the printer. Today I decided to put the MMU back on, it seemed fine until I went to load filament. The selector/FINDA probe won't move at all, and without having filament near the MMU the 5 flashing red lights happen. It boots up normally, clicking sounds when it turns on and all, but won't do anything when I try to load filament. If anybody has any sort of insight as to what's going on, I would appreciate it greatly.

Posted : 24/03/2021 10:06 pm
Eminent Member
RE: 5 flashing lights

Hello! To me it sounds like there is either filament inside the FINDA, or the FINDA probe itself is not properly adjusted. See this video for more info:


Posted : 25/03/2021 11:19 pm
Noble Member
RE: 5 flashing lights

agreed.  5 orange/red lights means something is in the selector.   if they are orange/red and green, the manual says that's a power issue.

Posted : 27/04/2021 11:37 pm