Cause

An error occurred while communicating via wireless LAN or while in standby.
 

What to Do

Turn off the printer and turn it back on.

If this does not solve the problem, service is required.
For support and service options, sign into (or create) your Canon Account from the link below.
My Canon Account

 Important

• If you unplug the power cord, all the faxes stored in the printer's memory are deleted.