Canon imagePROGRAF GP-4000 - Manual (Page 832)

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Cause
Printer tried printing from Roll 2 (Lower), but optional roll unit is not installed in lower position of printer.
What to Do
Check if the roll unit is properly installed on the printer following the steps below.
1. Tap OK on the touch screen to stop printing.
2. Turn off the power and make sure the roll unit is properly installed on the printer.
Note
• For instructions on installing the roll unit, see the Roll Unit Setup Guide provided with the roll unit.
• Make sure the roll unit's connection cable is inserted all the way in.
If the error appears again, the printer may be damaged. Contact a Canon customer service center.
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