What do the error codes E1 and E2 mean, and how do I fix them?

Error code E1 means a paper size mismatch and E2 means a paper length mismatch — the printer has detected that the paper loaded does not match the print job. To fix this, press the Cancel button, load paper that matches the size of the page you want to print (or change the paper size settings in your application), and then print the document again. You can also change the paper size through the embedded web server (EWS). (Page 8)