016 CHECK TRAY <tray> / ADJUST GUIDES FOR PAPER SIZE OR SET
SIZE IN MENU Meaning: The TRA1SIZ, TRA2SIZ, or TRA3SIZ parameter on the
Paper Menu is set to AUTO; however, the tray sensors cannot detect
what size paper is in the tray. Actions: Do one of the following:
v  Adjust the size guides to the paper loaded in the tray.
v  Depending on the tray, set the TRA1SIZ, TRA2SIZ, or TRA3SIZ item in the Paper Menu to the specific size (instead of AUTO). 031 OUTPUT FULL / UNLOAD PAPER FROM MAIN BIN Meaning: The main output bin is full. Action: Remove the output. 035 OUTPUT FULL / UNLOAD PAPER FROM OFFSET BIN Meaning: The Offset Output Bin is full. Action: Remove the output from the bin. 041 TRAY MISSING / INSTALL TRAY 1 Meaning: Tray 1 is missing or open. Action: Install or close the tray. 042 TRAY MISSING / INSTALL TRAY 2 Meaning: Tray 2 is missing or open. Action: Install or close the tray. 043 TRAY MISSING / INSTALL TRAY 3 Meaning: Tray 3 is missing or open. Action: Install or close the tray. 049 COVER OPEN / CLOSE FACEUP BIN WHEN DUPLEXING Meaning: The Face-up output bin is open. When the Face-up Output
Bin is open, all jobs are sent to it, regardless of their intended
destination. Notes:
1.   Do not print duplex (two-sided) print jobs when the Face-up       Output Bin is open. The Face-up Output Bin supports simplex
      (one-sided) jobs only. If the printer receives a duplex job when the
      Face-up Output Bin is open, it stops printing until the duplex job
      is canceled or deleted.
2.   Multiple page jobs sent to the Face-up Output Bin will be stacked in reverse order. 214    Infoprint 21: User’s Guide