Hydovane HV07 manual shows upper pres cut out but none fitted! where do i adjust

Our Hydovane HV07 (ACS) air pressure adjustment is shown in the manual (page 25 ) chrome-extension://oemmndcbldboiebfnladdacbdfmadadm/http://remont911.com/wp-content/uploads/2014/03/%D0%98%D0%BD%D1%81%D1%82%D1%80%D1%83%D0%BA%D1%86%D0%B8%D1%8F-%D0%BF%D0%BE-%D1%8D%D0%BA%D1%81%D0%BF%D0%BB%D1%83%D0%B0%D1%82%D0%B0%D1%86%D0%B8%D0%B8-%D0%B4%D0%BB%D1%8F-Hydrovane-HV04-05-07-%D0%B0%D0%BD%D0%B3%D0%BB.%D1%8F%D0%B7-2003-%D0%B3..pdf as a pressure sensor with upper and lower settings on the top of the machine under the panels , however ours has none fitted. I assume the switching is now done electronically but the manual does not reflect this. The manual sates it can be adjusted up to 10.5 Bar, ours is set to 7.5 Bar. The machine is 5 years old 39,000 hrs and has been regularly serviced. I just need to tweak it up to 8.5 to cover increased demand from an additional CNC in our shop. Any idea where the settings are now