Epson EPL-N2700 Quick Reference Manual page 18

Invalid ROM A
The ROM module in slot A is not supported by this
printer, or a supported module is installed incorrectly.
See "Adobe PostScript3 ROM Module" in the Reference
Guide to make sure you are using a suitable ROM for this
printer or to reinstall the ROM.
Invalid ROM B
The ROM module in slot B is not supported by this
printer, or a supported module is installed incorrectly.
See "Adobe PostScript3 ROM Module" in the Reference
Guide to make sure you are using a suitable ROM for this
printer or to reinstall the ROM.
Jam xxx xxx xxx xxx
Paper is jammed in the tray, cassettes, covers, or other
devices indicated by xxx. Remove the jammed paper.
See "Clearing paper jams" on page 1 for help with
clearing the jam. See "Preventing Paper Feed and Paper
Jam Problems" on page 1 for advice on preventing this
problem.
Job Cancel
The print job sent to your printer is canceled.
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