Kyocera FS-4100DN Operation Manual page 260

Message
Toner is running out.
Top tray is full of
paper.
Remove the paper.
Unknown toner
installed. PC
USB memory error.
Press [OK].
Corrective Action
The toner has run low. Ensure that a new toner container is available without
delay. For details, refer to Toner Container Replacement on page 7-2.
The top tray has become full (approx. 250 (FS-2100D and FS-2100DN) or 500
(FS-4100DN, FS-4200DN and FS-4300DN) pages). You must remove all
printed pages from the top tray. When the printer detects that the top tray is
empty again, the printer will continues printing into the top tray.
This message is displayed if the installed toner container's regional specification
does not match the machine's.
Install the specified toner container.
An error has occurred in the USB memory device.
Look at the error code given in place of ##.
The possible error codes and their descriptions are as follows.
01: The amount of data that can be saved at once has been exceeded. Split the
large file into multiple smaller files.
##
The USB memory is write protected. Remove the write protection.
The USB memory is broken.
Even if the problem is not solved, format the USB memory with the device or
use the new USB memory compatible with the printer.
04: There is no available space. Delete unnecessary files, etc., in order to free
up space.
8-16
Troubleshooting