Epson Stylus Color 660 Manual page 105

Status Monitor 3
The Status Monitor 3 utility's Printer Status window provides
status messages and a graphic display showing the current state
of the printer.
If a problem occurs while printing, an error message appears in
the Progress Meter window.
When ink is out, click the How To button in the Printer Status
window and the Status Monitor will lead you step-by-step
through the cartridge replacement procedure.
Running a printer operation check
Performing a printer operation check can help you determine
whether the problem comes from the printer or the computer.
To print a printer operation check page, follow these steps.
1. Make sure both the printer and computer are turned off.
2. Disconnect the cable from the printer's interface connector.
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Unknown Printer Error
An unknown printer
error has occurred.
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Turn off the printer, and
contact your dealer.