Canon imagePROGRAF iPF820, User Manual, Page: 683 / 702

Messages regarding printheads
PHead needs cleaning.
Cause Corrective Action
Press the Online button to resume printing. The Printhead nozzles are clogged.
Follow these steps to clean the Printhead.
1.
Hold down the Stop button for a second or more
to cancel printing.
2.
Printhead cleaning options.
(→P.578)
If the message is still displayed after you execute
Head Cleaning B once or twice, contact your Canon
dealer for assistance.
Wrong printhead.
Cause Corrective Action
An incompatible Printhead has been installed. Open the Top Cover and replace the Printhead with
a new one.
(→P.579)
Problem with Printhead
Cause Corrective Action
The Printhead nozzles are becoming clogged. If printing is faint, clean the Printhead.
(→P.578)
Printhead error
Cause Corrective Action
There is a problem with the Printhead. Open the Top Cover and replace the Printhead with
a new one.
(→P.579)
No printhead
Cause Corrective Action
No Printhead is installed. Install the Printhead.
(→P.579)
Error Message 669