Hi, received a new K1 Speedy about 10 days ago, first thing I did was to root it all OK and have fall Fluidd controls. My problem is when a print as finished a get CF0502 main board fan exception error I have checked the fan is plugged in OK and that the fan spins freely I then removed it and checked it against the one from my Ender 3V3 plus as it as the same fan and also as the same motherboard I then tested it with a 24v DC power supply red+ black- and it runs OK any ideas anyone thanks in advance for any help.