Epson EPL-N2000 Reference Manual page 152

Service Req.CXXX
Service Req.EXXX
A controller error or a print engine error has been detected.
Write down the error number listed on the display and turn off
the printer. Wait at least five seconds and then turn it back on.
If the error message still appears, turn off the printer, unplug
the power cord, and contact a qualified service person.
Standby
The printer is in its low power state; however, it is still on line if
the On Line light is on.
Toner Low
The printer is almost out of toner. You should prepare a new
imaging cartridge; the toner will be out soon.
Toner Out
You must replace the imaging cartridge. Replace it as described
later in this chapter.
Press Continue to print one more page.
Turn Paper
The paper's direction set in LC1 or LC2 is not correct. To
correct this error, reset the direction.
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Troubleshooting and Maintenance