Dental Unit D 3285 Sirona, giving Error E3, any one can guide to solve the problem...thanks

hello sir or lady, i have a  sirona E3 dental chair model D3199 and serial no 53441 my technician are not more expert, to install it,then we need the map of all parts espacialy light wiring route andd he hase some problem on the route of air and water .

please give me the map of this model by the way i should say i have bought it used.

thanks alot

Please i need the service manual of sirona dental chaire model e3!

Thanks!