Epson EPL-N2750 Reference Manual page 192

Menus Locked
SelecType, which is usually accessible from the printer's control
panel, has been disabled. This setting can be cleared by using the
EPSON WebAssist utility. Clear the Panel Lock setting in the
Configuration-Printer-Print-Setup Menu.
Multibin <N> Full
The bin indicated by <N> (1 to 10) on an optional multibin unit is
full. Remove the sheets from the bin and press Continue.
Multibin is Removed
The 10-Bin Multi-Purpose Unit is not installed properly, or is not
firmly attached to the printer. Install the unit as instructed in
"Installing the 10-Bin Multi-Purpose Unit" on page 4-36, then
press Continue.
Need Memory
Your printer lacks the printer memory required to print your print
job. Reduce the amount of images or text in the print job, or install
an optional memory module. See "Memory Modules" on page
4-55.
Offline
The printer is not ready to print.
Outbin Select Error
The printer cannot feed paper to the output tray you selected,
because of a paper size discrepancy. The printed sheet is fed to
the Face-down Tray (or Bin 1) of the Multi-Purpose Unit.
Press the Continue button to clear this message. Select Face-
down Tray (Bin 1) as the Output Tray setting in the printer driver.
If you want to output to another tray instead of Bin 1, change the
Paper Size setting of your document.
Troubleshooting
6-25