102 Activate/deactivate OPT recommendation When the programme is selected: - the “OPt” message is displayed on the left display; - the “OFF” message is displayed on the right display. To activate the OPT recommendation it is necessary to press the “Enter” key; the message “on” will appear on the right display, and the “OPT” icon will appear inside the ”activated or recommended functions area”. The programme is used to recommend the operator to execute the optimisation, via the OPT flash programme, when a considerable wheel unbalance is noted. - Press the “exit” key to return to the service environment. - To exit the service environment completely, press the “Exit” key again.