Operation Manual

Service Req Cffff/Service Req Exxx
A controller error or a print engine error has been detected. Turn off the printer. Wait at least 5
seconds, then turn it back on. If the error message still appears, write down the error number listed on
the LCD panel (Cffff/Exxx), turn off the printer, unplug the power cord, then contact a qualified
service representative.
Sleep
The printer is currently in the power-save mode. This mode is canceled when the printer receives print
data.
Toner Cartridge Error uuuu
A read/write error has occurred for the indicated toner cartridges. (The color Cyan(C), Magenta(M),
Yellow(Y), or Black(K) appears in place of uuuu.)
Remove the toner cartridges and reinsert them. If that fails to clear the error, replace the toner
cartridges.
To install the indicated cartridges. See “Replacing Consumable Products” on page 133.
Toner Low (uuuu Toner Low)
This message indicates that the toner cartridge for the indicated color is near the end of its service life.
Prepare a new toner cartridge.
Transfer Unit Needed Soon
This message indicates that the transfer unit is near the end of its service life. You can continue to print
until the Replace Transfer Unit message appears.
Turn Paper MP Tray, Turn Paper Cassette1, Turn Paper Cassette2, Turn Paper Cassette3,
Turn Paper Cassette4
The direction of the paper loaded in the specified paper cassette does not match the required paper
direction. Turn the paper direction to landscape.
Turning off Please wait
The printer is entering the power off mode.
Unable Clear Error
Epson AcuLaser C9300 Series User's Guide
Using the Control Panel 103