Epson EPL-N2000 Reference Manual page 145

If you turn on Size Ignore in the SelecType Config menu, this
error does not occur.
Check Paper Size
The paper size setting is different from the size loaded in the
printer. Check to see if the correct size of paper is loaded in the
tray; then press the Continue button to clear the message.
If you turn on Size Ignore in the SelecType Config menu, this
error does not occur.
Check Serial I/F
This error occurs in serial interfaces. To correct the error, reset
the printer by pressing ALT and Reset at the same time. Then
set the parity, band rate, number of data bits, and number of
stop bits to match the computer.
Duplex Mem Overflow
There is not enough memory for duplex printing. The printer
prints only on the top side and ejects the paper. To correct this
error, follow the steps below.
If Auto Cont is
Continue or (2) reset the printer by pressing the ALT and Reset
at the same time.
If Auto Cont is
corrected automatically.
in the SelecType Config menu, (1) press
in the SelecType Config menu, the error is
Troubleshooting and Maintenance
6-19