Canon MF244dw User Manual page 354

Cart. Comm. Error A counterfeit or non-Canon cartridge may be in use.
Toner cartridge is not installed correctly, or there is possible trouble on the toner cartridge.
● Reinstall the toner cartridge. If this message does not disappear after reinstalling several times, the toner
cartridge might be possibly broken. Contact the shop where you purchased the machine, or the Canon
Customer Care Center.
How to Replace Toner Cartridges(P. 390)
You might not be using a Canon genuine toner cartridge.
● We recommend Canon genuine toner cartridges as replacement toner cartridges.
Consumables(P. 424)
Cart. end of lifetime. Rplcmt. recommended.
The toner cartridge has reached the end of its lifetime.
● Replacement of the toner cartridge is recommended.
How to Replace Toner Cartridges(P. 390)
Check the authentication settings.
The authentication method set on the machine does not match the authentication method set on the
RADIUS server.
● Check that the same authentication method is set on this machine and the RADIUS server, and set the
correct authentication method.
Configuring IEEE 802.1X Authentication(P. 252)
Could not connect. Check the PSK settings.
The network key (PSK) of a wireless router to be connected is not set to the machine correctly.
● Check the network key (PSK) of the wireless router, and set it to the machine again.
Checking the SSID and Network Key(P. 184)
Setting Up Connection by Selecting a Wireless Router(P. 177)
Setting Up Connection by Specifying Detailed Settings(P. 180)
● If the problem persists even after checking the network key, check whether the machine is properly
installed and ready to connect to the network.
Installation/Settings Problems(P. 356)
Could not connect using Access Point Mode.
Connection in Access Point Mode failed due to an error.
● Wait a few moments and try again. If you still cannot connect, try switching the machine off briefly.
Troubleshooting
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