Epson WorkForce Pro WF-C8690 A3 Color MFP with PCL/PostScript - Manual (Page 380)

380
Code Condition/solution
204 The recipient's fax machine is busy. Confirm the recipient's fax number, wait a moment,
then try again.
205 The recipient's fax machine does not answer. Wait a moment, then try again.
206 The phone cable is incorrectly connected to the product's LINE and EXT. ports. Connect
the phone cable correctly.
207 The phone cable is not connected. Connect the phone cable.
208 The fax could not be sent to some of the specified recipients.
Print a fax log or Last Transmission report to check which recipients failed to receive the
fax. If the
Save Failure Data setting is turned on, you can resend a fax from Job Status in
the Job/Status Menu.
301
401
There is not enough storage space available to save the data in the external memory
device. Clear space on the device, reduce the number of documents, or use a different
device.
302
402
The external memory device is write-protected. Disable write protection.
303 No folder is available for saving the scanned file. Create a folder or use a different
memory device.
304
404
An external memory device has been removed. Reinsert the device.
305
405
An error occurred while saving data to an external memory device. Reinsert the memory
device or use a different device.
306
327
The product's memory is full. Wait until current jobs are finished processing.
311
321
411
421
A DNS error has occurred. Check the DNS settings for the server, computer, or access
point. DNS settings for the server can be checked from the DNS Server option in the
Setup menu. If you cannot clear the problem, contact your product administrator.
312
412
An authentication error has occurred. Check the Server Settings in the Settings menu. If
you cannot clear the problem, contact your product administrator.