Epson EPL-N2000 Reference Manual page 148

Image Optimum
The printer cannot print at the requested quality level because
of insufficient memory, and the printer reduces the quality
automatically so that the printer can continue printing. Check
to see if the printout is acceptable. If not, add more memory
(for a permanent solution) or set Device Resolution to Low (300
dpi) and Page Protect to Auto temporarily in the driver.
Manual Feed XXX
Manual Feed mode is specified for the current print job. Make
sure the paper size indicated by XXX is loaded in the MP Tray,
then press On Line.
If you do not want to print this job in manual mode, press
Continue. The printer feeds paper according to the Paper
Source setting.
For detailed information on the Manual Feed mode, see
Chapter 1.
Mem Overflow
The printer has insufficient memory available for the current
task. To correct the error, press Continue. If the message
remains, press Reset.
You can also clear this error by turning the printer off and back
on again. However, it may be necessary to reduce the number
or size of fonts, reduce the number or size of graphics, lower
the resolution, or add more memory to the printer.
6-22
Troubleshooting and Maintenance