It's possible that you have installed only the printer driver for the product. In this case, access the official website and download the printer and the scan driver. Unplug the device, download the drivers and then install the package. When it asks plug the device and turn it on. Press the scan button and wait for Windows to install it.
Additionally, go to Device manager (Start > Run> devmgmt.msc) and locate the device. Right click it and select Update driver. Follow the instructions and then you will have the possibility to scan.