Man Roland 306 L error

Dear all,

I have the fallowing problems with the press.

The main problem is with communication with first printing unit, particularly the info is that turning device is opened and a paper cannot be introduced. In the computer we see a lot of error related with communication (the inks buttons in control unit do not light up, the system indicate on red all parts of machine except printing unit which are on green, however, they work slow, the motors on unit do not work when indicated from control unit, the motors work only when a terminal is connected to the printing unit). We checked connection between second and first printing unit and its look ok.

I attached photo of list of errors (I have only in German).

I would appreciate your opinions and suggestions.

Kind regards,

Jaroslaw