Toner Cartridges - Epson AcuLaser C4000 Reference Manual

If you continue to use the printer without replacing consumable
products and a consumable product reaches the end of its service
life, the printer stops printing, EPSON Status Monitor 3 notifies
you of a change in printer status, and the following messages
appear on the LCD panel. When this happens, the printer cannot
resume printing until you replace the depleted consumable
products.
LCD Panel
Message
XXXX* Toner Out
Replace
Photocondctr
Replace
TransferUnit
* The letters C, M, Y, and K appear in this position, indicating the color of the toner
to be replaced. For example, the message
toner remaining in the yellow toner cartridge is low.
Note:
Messages appear for one consumable product at a time. After replacing
a consumable product, check the LCD panel for replacement messages
for other consumable products.

Toner cartridges

Replace empty toner cartridges only with the toner cartridges
listed below:
Toner Cartridge (Yellow)
Toner Cartridge (Magenta)
Toner Cartridge (Cyan)
Toner Cartridge (Black)
Description
The indicated toner cartridges are empty.
Printing has stopped to avoid damage to the engine.
The transfer unit has reached the end of its service life.
S050088
S050089
S050090
S050091
Maintenance and Transportation
means that the amount of
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