Kingroon KP3S 3.0 3D Printer with a direct drive extruder

We have several warehouses located in Australia, Canada, US, EU, Russia, Brazil, UK and China. Normally, your order will be directly dispatched from the warehouse near by your location. Occasionally, if the warehouse near by you run out of inventory, we will ship your parcel directly from China to fulfill your order. Before that, we'll have email confirmation with you. 

We provide one year warranty for our 3D printers that ordered on our official website, and life long tech support.

Kingroon KP3S 3D printer operates on a 24V DC input. So you need a 24V blower fan for the printer too.

No worry, this can be easy. First remove the filament inside the print head. Preheat the nozzle to 200 - 210℃. Push the extruder handle (the protruding part on the top of extruder) leftward to loosen the gear. Then push the filament downward to force the melted filament come out of the nozzle, and then suddenly and quickly pull the filament upward until it comes out from the extruder. Second, let's load new filament in. Before doing so, make sure the nozzle is preheated and the first inches of the new filament are straight enough. Push the extruder handle leftward again and then insert the new filament. And then push the new filament downward with force until it begins to melt and come out from the nozzle. Note: during this step, you can hear a clicking sound. That is the filament feeding into the print head. It also means you still need to push the filament downward to reach the nozzle.

1152000

Err7: Thermal Runaway Check the nozzle temperature or hot bed temperature by tapping "Preheat" button. A negative number indicates that the thermistor is in poor contact or damaged.

Yes, you could get tutorial of how to install Octopi and configure it for Kingroon KP3S 3D printer on the following blog:
https://kingroon.com/blogs/3d-print-101/octoprint-installation-configuration-tutorial-on-kingroon-kp3s

Three conditions may lead to noisy blower fan of KP3S.
 1st, check if there is too much dust or foreign object inside the fan. If so, clean the fan and remove any possible foreign object.
 2nd, when noisy fan happens on a new KP3S, check if the extruder fan cover is out of shape; if so, replace it with a new one since deformed fan cover can block the rotating fan blades and makes noise.
 3rd, check if the red and black fan wirings are too close to the fan blades; if so, move them a little further from the fan blades.