If you aren't able to set up Google Cloud Print, check the following:
Check that your printer shows the Wi-Fi signal bars in the corner of the LCD screen and that your Chromebook shows Wi-Fi bars in the lower-right corner of the screen.
Make sure that your printer and Chromebook are connected to the same wireless network.
If you don't see a notification that your printer is detected on your network, follow these steps:
Ensure that you printer has the latest Firmware Version. Earlier versions of Firmware may not support this setup method of Google Cloud Print. For more information on how to update your printer's firmware, refer to the below article:
Type chrome://devices into the address bar and press Enter.
Click the Register button that appears next to your product.
Click Register on the confirmation screen. Your printer's LCD screen displays a confirmation message.
Press the OK button on your printer to confirm the Google Cloud Print connection.
Verify that your router or access point is operating correctly by connecting to it from your computer or another device.
You may need to disable the firewall and any anti-virus software on your wireless router or access point.
Make sure that that port 5222 (TCP) is open on your router or access point.
If your router or access point does not broadcast its network name (SSID), follow the instructions to enter the wireless network name manually.
If your router or access point has security enabled, determine the kind of security it is using and any required password or passphrase for connection. Then make sure to enter the exact WEP key or WPA passphrase correctly.