Canon imageCLASS D1650 All-in-One Monochrome Laser Printer - Manual (Page 648)

A TLS server certificate verification error has occurred during communication with the SMTP server.
● Check that the CA certificate that signed the TLS server certificate on the SMTP server side is registered to
the machine by using the Remote UI.
● Check that the TLS server certificate on the SMTP server side is valid.
● Check that the TLS server certificate is not a self-signed one.
#844
TLS encrypted communication to a POP3 server failed when sending an e-mail with POP before SMTP.
● Check the TLS encrypted communication settings in the POP3 server.
● Clear the [Use TLS for POP] check box. If the problem persists, clear the [Use POP Authentication Before
Sending] check box, and set the communication setting to a setting other than POP before SMTP.
Configuring E-Mail/I-Fax Communication Settings(P. 91)
When verifying an TLS server certificate to communicate to the POP3 server, a verification error
occurred.
● Check that the CA certificate that signed the TLS server certificate on the POP3 server side is registered to
the machine by using the Remote UI.
● Check that the TLS server certificate on the POP3 server side is valid.
● Check that the TLS server certificate is not a self-signed certificate.
#846
An e-mail or I-Fax could not be sent due to a POP authentication failure.
● Check the setting, and try again.
Configuring E-Mail/I-Fax Communication Settings(P. 91)
#852
The machine turns OFF for some reason.
● Check whether the power plug is inserted into an outlet firmly.
#853
A document could not be printed because its data size exceeded the machine's upper processing
capability.
● The machine may not be able to print documents with many pages. Reduce the number of pages per
printing, or print when no print job is queued or no document is being printed. If you are still unable to
print, check the document data for any defects.
Printing was canceled from the computer.
● If you cancel an operation when the print data is being sent to the machine from a computer, this error
code is displayed, but this is not abnormal. Print again as necessary.
Troubleshooting
640