16 replies

Part Cooling Fan not working BTT Octopus MAX EZ - New VC4 Build

Hi, I am having an issue getting my Part Cooling Fan to work on my new Octopus MAX EZ board and EBB42 Toolboard. I have set the 12v jumper on one of the FAN ports on the board and have plugged the PWM on the Toolboard according to the build guide but the fan will not spin. I have tested with a second 4028 fan but still nothing. The PWM displays in Mainsail. I have continuity along the wiring so that seems good. My 24v electronics FANs work fine when the steppers start so the 24v rail works. How can I check that I am getting 12V from the FAN port on the Octopus MAX EZ???

Any help would really be appreciated. I hope its not a faulty 12v rail on a new board...

Solution

Hi, I have managed to get the fan working by connecting the 12v to the MFAN port. As soon as the printer powers on the fan spins at 100% so it's getting the 12v it needs. I am guessing the 4 2pin VFAN ports have an issue with the 12v rail and the MFAN must by using a different 12v rail. Looks like it's a faulty Board... Now just need to get it replaced by BTT.

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