Rel lever is in wrong position. ........................................................................................................................ 132Remaining level of the ink cannot be correctly detected. Check ink tank. ...................................................... 134Roll feed unit error. ........................................................................................................................................ 133Roll printing is selected, but sheets are loaded. ............................................................................................. 128Roll printing is selected. ................................................................................................................................. 128Roll x is empty. (x is 1 (Upper) or 2 (Lower)) ................................................................................................... 129Roll x is selected. (x is 1 (Upper) or 2 (Lower)) ................................................................................................ 129Roll x jam (x is 1 (Upper) or 2 (Lower)) ........................................................................................................... 131Sheet printing is selected. ............................................................................................................................. 130Sheet removed. ............................................................................................................................................. 130The following ink tanks cannot be recognized. .............................................................................................. 135The mail box is full. ........................................................................................................................................ 141The paper is too small. .................................................................................................................................. 126The paper is too small. .................................................................................................................................. 126The roll feed unit is loose. .............................................................................................................................. 133This paper cannot be used as size is not supported. ..................................................................................... 128This type of paper is not compatible with HP-GL/2. ...................................................................................... 143Top cover is open. ......................................................................................................................................... 144Unknown file. ................................................................................................................................................ 145Wrong ink tank. ............................................................................................................................................. 135Wrong maintenance cartridge. ...................................................................................................................... 140Wrong printhead. .......................................................................................................................................... 138iPF840 SeriesBasic GuideError Message Error Messages147