You can print a network connection report to check the status between the printer and the wireless router.
If you want to configure settings on a printer with Lock Setting enabled, you must log in as an administrator.
You will be prompted to enter the administrator password when entering a locked menu.
Select Settings on the home screen.
To select an item, use the 
buttons, and then press the OK button.
Select General Settings > Network Settings > Connection Check.
The connection check starts.
Follow the instructions as the diagnostic results are displayed on the screen.
If an error has occurred, print the network connection report, and then follow the printed solutions.