About the power supply fan, when the tempreture is below 10℃, the oil in the fan will be solidified. It would affect the fan and produce the noise. This is normal,don’t worry. When printer works for a while, the oil will be melted and the noise will be stopped.
Tips:If you can’t stand the noise, you can contact our after-sale service to to replace the power supply fan. The type is 12V,0.15A, our after-sale will guide you to change.