If the wireless router's DHCP is enabled, set the printer's TCP/IP settings to Auto.
If the printer’s Obtain IP Address setting is set to Manual, the IP address you manually set is invalid due to out of range (for example: 0.0.0.0). Set a valid IP address from the printer’s control panel.
Turn off the wireless router. Wait for about 10 seconds, and then turn it on.
Make network settings of the printer again.