This error refers to the feed roller sensor not detecting rotation of the feed roller. You will find it at the left end of the roller. It may have come dislodged or just gone faulty. Thats the area to look at.
Srri can't be of more help
this code has to do with the carriage lifting position.
You have to check (on the right side of the machine) if a foreign object (paper) is blocking the carriage.
Then Check the encoder wheel and the encoder sensor.
The last you have to check is the motor that operates the lifting motor.