Epson EPL-6200 Reference Manual page 372

If paper is loaded, then there is a paper jam in the feed slot. See
"Clearing Jammed Paper" on page 363 for instructions on clearing
paper jams. The error is automatically resolved upon clearing the
jammed paper and opening and closing the printer's front cover.
No Developer Cartridge Installed
Control panel: Ready and Error lights on
Either the developer cartridge is not installed or is installed
incorrectly. Check to see if the developer cartridge is properly
installed and follow the instructions under "Developer
Cartridge" on page 306 to install or reinstall it.
Wrong Developer Cartridge Installed
Control panel: Ready and Error lights on
Either the installed developer cartridge is defective, or it is not the
right one for your printer model. Replace it with a new or correct
developer cartridge by following the instructions under
"Developer Cartridge" on page 306.
Installed Developer Cartridge is Not a Genuine EPSON Product
Control panel: Ready light on, Error light flashing
Troubleshooting
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