Epson Stylus NX430 Wi-Fi printer "not connected", Yosemite 10.10.4
I have an iMac (27-inch, Mid 2011). After upgrading to Yosemite 10.10.4 I keep "losing connection" with my Epson Stylus NX430 Wi-Fi printer. I have to completely power down and restart the printer every time I need to print something (after the printer goes to sleep). The printer is still on. The Wi-Fi light on the printer is on. As far as I can tell the printer should be connected. It shows as Idle, Default under Printers & Scanners, System Preferences. When I attempt to print, the iMac is "Looking for printer" and then responds with "The printer is not connected". This was not the case before the upgrade to Yosemite. Any help here would be greatly appreciated!
Thanks
iMac, OS X Yosemite (10.10.4), (27-inch, Mid 2011)