III. Upper layers are wrapped
If you set up too much cooling while print, then the upper layer of the print can warp wery easilly. Please watch out ! Cooling is causing warping and warping is causing rising of the layers and this will lead to an contact (mostly fatal contact by destroying your model or damage of your hot end) to the nozzle as it moves. Of course in most cases the print will release from the platform, but if it doesn't it can really casue damages of teh print or of the printer parts. In the upper layers try reducing the speed of the fans slightly if your prints are suffering from warping.