Paper jammed or the maximum scannable length has been exceeded. Open the ADF top section and remove the document. Select Manual Feeding scan when you scan a document larger than 360 mm (14.17 in.).
The issue may be caused by the following:
Paper jam occurred inside iX1600 or iX1500.
You tried to scan a long page document (a document longer than the standard size).
Perform the following:
Open the ADF top section of iX1600 or iX1500 to remove the document remaining in the ADF.
To scan a long page document with iX1600 or iX1500, set [Manual Feeding Scan] for [Feed] under [Scanning] in [Profile].