I'm not positive but I think that is the error when you run out of media. Like it tries to pull material and it can't.
hi Mark
this is what the manual says, but in all the errors it tells you what you should do.
try all these steps.
Turn off the power.Take off the cover on the side with the readout, push the carriageslightly to the right and it will unlatch so you can move it to the left [printbed side]. Make sure the wiper mech is correctly lined up [there is an arm that goes between two sensors ]. Then try turning the power on and it will re-home. Good luck.