Epson EPL-6100 Reference Manual page 205

Control panel: Ready and Error lights flashing.
Indicates that the printer is deleting the oldest print job stored in
the printer.
Cancel Print Job (by host)
Control panel: Ready and Error lights flashing.
Indicates that the printer is deleting the specified print job sent
from the Host PC.
Offline
Control panel: Error light flashing (flashes at longer intervals than
usual)
Indicates that the printer is not ready to print. Press the N
Start/Stop button to make the printer ready to print.
Ready
Control panel: Ready light on
Indicates that the printer is ready to print.
Standby
Troubleshooting
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