Epson EPL-N3000 Reference Manual page 316

PS3 Hard Disk full
The memory allocated for writing PostScript 3 commands on the
optional Hard Disk Drive is full.
To clear this error, select Clear Warning from the control panel's
Reset menu. For instruction about accessing the control panel
menus, see "How to access the control panel menus" on page 339.
RAM Check
The printer is checking the RAM.
Ready
The printer is ready to receive data and print. The level of
remaining toner is also indicated on the right side of this message.
Replace Toner
The imaging cartridge is out of toner and need to be replaced.
See "Replacing the imaging cartridge" on page 224 for
instructions.
Reserve JobCanceled
The printer cannot store the data of your print job using the
Reserve Job function. The maximum number of print jobs stored
in the printer's Hard Disk Drive has been reached, or the drive
has no more memory available to store a new job. To store a new
print job, delete a previously stored job. Also, if you have any
Confidential Jobs stored, printing those jobs will make more
memory available.
To clear this error, select Clear Warning from the control panel's
Reset menu. For instruction about accessing the control panel
menus, see "How to access the control panel menus" on page 339.
Troubleshooting
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