Epson Aculaser C1100 Series Instruction Manual page 217

Can't Print Duplex
The printer has encountered problems during duplex printing.
Make sure you are using an appropriate type and size of paper
for the Duplex Unit. The problem could also be a result of
incorrect settings for the paper source you are using. Pressing the
N Start/Stop button will print the rest of the print job on only one
side of the paper. Press the + Cancel Job button to cancel the print
job.
Check Transparency
You have loaded media other than transparencies when the Paper
Type setting in the printer driver is Transparency, or
transparencies are loaded when the Paper Setting in the printer
driver is not set to Transparency. Paper is jammed at the MP tray.
To clear the jam, see "When transparencies are jammed at the MP
tray" on page 191.
Check Paper Size
The paper size setting is different from the size of paper loaded
in the printer. Check to see if the correct size of paper is loaded in
the specified paper source.
To clear this error, select Clear Warning from the control panel's
Reset Menu. See "How to access the control panel menus" on page
247 for instructions.
Check Paper Type
The media loaded in the printer does not match the paper type
setting in the printer driver. Media that matches only the paper
size setting will be used for printing.
To clear this error, select Clear Warning from the control panel's
Reset Menu. See "How to access the control panel menus" on page
247 for instructions.
Troubleshooting
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