A/C Service Station, Connecting For Measuring And Testing
-- Turn off the ignition.
-- Connect the A/C service station to the power supply.
-- Connect quick-release coupling adapter to charging hoses of service station (handwheels not screwed in/hand shut-off valve not open).
-- Switch on service station and evacuate charging hoses (only necessary if there is air in charging hoses).
-- Switch off A/C service station.
-- Remove caps from service connections (with valve).
-- Connect the A/C service station to the refrigerant circuit using service connections with quick-release coupling adapters.
-- Screw in handwheel of quick-release coupling adapters only until valves are definitely open at refrigerant circuit connection (observe pressure gauge, do not strain valves).
-- Perform planned tests and measurements.