Canon iPF9000S Troubleshooting Manual page 35

Panel display
Code
(last 4
Large LCD
digits)
280C PHead needs
280D cleaning.
280E Press Online to
clear error.
The printhead
requires cleaning.
The printhead
requires cleaning.
Online=Print
Stop=Stop Printing
Execute printhead
cleaning. If this
message is still
displayed, replace
the printhead.
Small Small
LCD 1 LCD 2
Printhead Online Head R non-ejection warning (Check
(R) Key printhead) Printing paused/ continued
Check Press To printing allowed
Nozzles Print
The level of error is decided as shown in the
table below, based on the number of
non-ejecting nozzles per color (per chip) and
the number of nozzles unable to back up.
Depending on the firmware version, the
specifications vary as shown in the table
below.
Explanation/Detection sequence
2-23
Chapter 2 Indexes by Case
Remedial Action
(★: Reference fault
isolation procedure
or tool)
①Check image
quality. (Unless
there are
problems with
the image
quality, there is
no need to
replace the
head.)
②Replace the
head.
★If the problem
persists, go to
2F2F (P3-6).