Epson AcuLaser C4000 Owner's Manual page 337

PS3 Hard Disk full
The memory allocated for writing PostScript 3 commands on the
optional Hard Disk Drive is full.
To clear this error, select Clear Warning from the control panel's
Reset Menu. For instruction about accessing the control panel
menus, see "How to access the control panel menus" on page 171.
RAM Check
The printer is checking the RAM.
Ready
The printer is ready to receive data and print.
Replace Photoconductor
Printing has stopped to avoid damage to the engine. Turn off the
printer, then replace the photoconductor unit with a new one. See
"Photoconductor unit" on page 263 for instructions.
The error clears automatically after you replace the unit and close
all printer covers. The photoconductor service life counter is reset
automatically.
Replace TransferUnit
The transfer unit has reached the end of its service life. Turn off
the printer, then replace the transfer unit with a new one. See
"Transfer unit" on page 275 for instructions.
The error clears automatically after you replace the unit and close
all printer covers. The transfer unit service life counter is reset
automatically.
Troubleshooting
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