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EPSON AcuLaser C4000  Quick Reference
Paper Set XXX YYY
The paper loaded in the specified paper 
source (XXX) does not match the required 
paper size (YYY). Replace the loaded paper 
with the correct size paper and press the N 
Start/Stop
 button to resume printing. Or 
press the q Job Cancel button to cancel the 
print job.
If you press N Start/Stop
 button without 
replacing the paper, the printer will print on 
the loaded paper even though it does not 
match the required size.
Printer Open
Cover A, cover B, cover D, or some 
combination of these covers are open. To 
clear this error, close all covers.
Print Overrun
The required time to process the print data 
exceeded the print engine speed because the 
current page is too complex. Press the N 
Start/Stop
 button to resume printing. Or 
press the q Job Cancel button to cancel the 
print job. If this message appears again, 
select On as the Page Protect setting in the 
control panel’s Setup Menu.
If you continue to receive this message when 
printing a particular page, try simplifying 
the page by limiting the number of graphics 
or reducing the number and size of fonts.
You can also add more memory to the 
printer as described in “Memory Modules” 
in the Reference Guide.
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.” 
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” in the Reference 
Guide 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” in the Reference Guide 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.