VW Golf manuals

Volkswagen Golf Service & Repair Manual: Connecting air conditioner service station

For vehicles that have connections on both low-pressure and high-pressure sides of refrigerant circuit
Connecting air conditioner service station for measuring and checking
–  Switch off ignition.
–  Connect air conditioner service station to power supply.
–  Connect quick-release coupling adapters to charging hoses for air conditioner service station (handwheels not turned inwards, i.e. hand shut-off valves not open).
–  Switch on air conditioner service station and evacuate charging hoses (necessary only if there is air in the charging hoses).
–  Switch off air conditioner service station.
–  Unscrew sealing caps from service connections (with valve).
–  Connect air conditioner service station via service connections to the vehicle refrigerant circuit using quick-release coupling adapter.
–  Turn handwheel of quick-release coupling adapter inwards only far enough to ensure that valves on service connections are open (check using a pressure gauge; do not overstress valves).
–  Perform the intended measuring and checking work.
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