The Wi-Fi setting is disabled.

Log in to Administrator Mode, set > [Device] > [Network Settings] > [Wireless LAN Settings] > [Common Settings] to [Enabled], and configure the [Wi-Fi Connection Settings] settings.

The SSID for the wireless LAN access point is incorrect.

Log in to Administrator Mode, select the correct SSID from the list under > [Device] > [Network Settings] > [Wireless LAN Settings] > [Wi-Fi Connection Settings], or enter the correct SSID from [Manual Settings].

Your computer's firewall settings may be blocking the computer from connecting to the machine. Check the firewall settings.

Check that the wireless LAN access point complies with IEEE802.11a/b/g/n/ac.

Incorrect SSID and passphrase for the wireless LAN access point may be entered on the machine.

Log in to Administrator Mode, select the appropriate SSID from > [Device] > [Network Settings] > [Wireless LAN Settings] > [Wi-Fi Connection Settings], and enter the correct passphrase.

The operating frequency band on the machine may be set to Fixed (2.4/5 GHz) in the WiFi settings, and therefore it does not match SSID for the wireless LAN access point.

In the WiFi settings on the machine, change the operating frequency in accordance with the wireless LAN access point.

The WiFi encryption settings on the machine may not match the settings on the access point.

Log in to Administrator Mode, and from > [Device] > [Network Settings] > [Wireless LAN Settings] > [Wi-Fi Connection Settings] > [Manual Settings] > [Encryption Settings], set correct encryption information.

The MAC Address restriction on the wireless LAN access point may disallow the machine's MAC address.

Check that the filter on the wireless LAN access point allows the machine’s MAC address. The MAC address can be checked on the machine's control panel.

Up to five access points are displayed in the list of [Wi-Fi Connection Settings] on the machine.

If the desired access point is not displayed, log in to Administrator Mode, and set the SSID and passphrase from > [Device] > [Network Settings] > [Wireless LAN Settings] > [Wi-Fi Connection Settings] > [Manual Settings].

The wireless LAN access point is in stealth mode.

Log in to Administrator Mode, and set the SSID and passphrase from > [Device] > [Network Settings] > [Wireless LAN Settings] > [Wi-Fi Connection Settings] > [Manual Settings].

Check the following on the router:

Check that the security setting on the wireless LAN access point is set to WPA or WPA2.

Make sure you press the WPS button on the wireless LAN access point within 2 minutes after you have begun setting up WPS on the machine.

Log in to Administrator Mode, and make settings under > [Device] > [Network Settings] > [Wireless LAN Settings] > [Wi-Fi Connection Settings] > [WPS (Push Button)].

Check that the entered PIN code for the wireless LAN access point is correct.

Log in to Administrator Mode, and make settings under > [Device] > [Network Settings] > [Wireless LAN Settings] > [Wi-Fi Connection Settings] > [WPS (PIN Code)].

Move the wireless LAN access point closer to the machine.

If there are more than one wireless LAN access point, they may use the same SSID.

The SSID and passphrase for the wireless LAN access point that is located closer to the machine must be set on the machine.

When using the roaming feature, the wireless LAN access points must be assigned the same SSID and passphrase.

There are more than one wireless LAN access point and the channel load is high, or there are devices that can cause radio interference such as a microwave oven or security camera in your environment.