Hc5500 system error S98-066 keeps showing and only way to clear is to turn machine off and on again. Any clue on what this might be, even the riso dealer engineer can not think what it means so would be good if i could let them know too.

SOURCE: riso HC5500

Are you still having this problem? If so, let me know and I will find you the answer.

SOURCE: Riso HC5500 error code

Hc5000 System Error S03-231

SOURCE: Print position on RISO HC5500 is shifted to the far left edge.

I have found this problim on 2 different hc 5500 machines. solution is to go into the service mode and switch off the LCD as it is not reading the edge of the paper, can be a problem on pre-printed paper or coloured paper. code to switch off LCD is 5.9.1.39. you must first enter tech service mode.

SOURCE: hc5500 ERROR CODE S03-255

If you are talking about the first paper feed tray.. I had the same problem yesterday.. I had a loose wire.. purple.. on one of the sensors near the back.. wiggle the wires a little.. until the paper tray light is on.. the push button has a light.. I was in test mode and couldn't get the motor to go up and down in test mode either. .. turned out not a big problem.. but if one of those little wires is loose or moved it might not be making a connection ..in which case.. no motor.. If none of these things work you could have something stuck at the bottom.. there's a little microswitch to tell the machine the paper tray is at the bottom.. It's under the tray.. see if that thing is stuck or moves freely. .. Sometimes it's dead spot on the elevator motor.. manually try to move that when the machine starts.. The error comes when the paper tray is supposed to move up to the ready position and it doesn't move..

Testimonial: "I have done everthing you said, but the problem still persisting: All the wires on the Sensor are well connected."

SOURCE: Riso HC5500 System Error - Restart!

does the machine show any error code?