"SHEET SET ERROR SET AGAIN"

[ENTER] was pressed even though the loading lever was not lowered.

Lower the loading lever, and then press [ENTER].

"EDGE DETECTION" is set to "ENABLE", but transparent media was loaded.

Raise the loading lever, set the "EDGE DETECTION" menu item to "DISABLE," and then reload the media. Lower the loading lever, and then press [ENTER].