Epson WF-3520-3521-3522 Error 0xF4 The Epson WF-3520-3521-3522 printer is a high-quality printing device that offers great performance and reliability. However, like any other machine, it may encounter errors from time to time. One of the error codes that users may come across is 0xF4, which is displayed on the printer’s screen. This error indicates a…