You probably need an updated driver. Try these two sources:
Printer and Scanner software available for download:
Epson drivers for Mavericks:
Thanks for this.
I have already been on the Epson website, and they do not have anything that supports it.
I have emailed them, just in case, and so awaiting a reply.
The list on the apple website does not include my printer, although the Airprint thing says that my is compatiable. Not sure if this is worth it.
Anyway, I appreciate your help. I just wonder why the printer still works, via the wifi connection, but the scanner doesn't.
In the Applications section, the scanner has a big circle with a line through it, and when you click on it, it says you can't use the Epson scanner with this version of OS X.
Looks like another printer.