Hello.
"Electrodrive" is right. It is the older mosfet combi controller.
Error:
42. Shortcircuit on output stage
43. Error in multipilot/joystick. Centervoltage not OK. Wiring or
poti broken.
46. No field current. Bad/burned controller.
47. Minimum field current not OK.
38. Check main contactor. This error is normally related to
other errors. Safety !!!
34. No communication with controller....
27. Unknown to me. Is not in my error list.
10. Multipilot activated during start up. It is proberly a bad
poti inside multipilot (or broken wire to multipilot)

All this errors seems a litle strange since they are not related. Check for humidity and dirt on all pcb's. Check connections on hydraulic controller (top pcb on power-steering) and use LISA to check if multipilot is OK.
Regards Max