Epson EPL-N2000 Reference Manual page 151

Reset All
All printer settings have been reset to the user default
configuration, the last settings that were saved.
Reset to Save
You have changed the SelecType setting but the new setting is
not activated immediately after exiting SelecType. To activate
the new setting, do one of the following: (1) exit SelecType by
pressing Continue or On Line (the new setting is activated
after the current print job is finished), or (2) reset the printer by
pressing ALT and Reset at the same time.
Self Test
The printer is performing its internal check cycle. It finishes
soon.
ROM Check
The printer is checking the ROM.
RAM check
The printer is checking the RAM.
Troubleshooting and Maintenance
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