A/C Service Station, CONNECTING FOR MEASURING AND TESTING
- Work procedure may vary depending on the type of tools selected (the tool-specific operating instructions should therefore be followed).
The work procedure is always to be performed as described in the operating instructions for the A/C Service Station.
The charging hoses are to be connected as follows to prevent the ingress of air or moisture into the refrigerant circuit:
-- Switch off the ignition.
-- Connect the A/C Service Station to the power supply.
-- Remove the cap from the service connections or connections with a valve (see vehicle-specific refrigerant circuit).
Refer to COMPONENT LOCATION OVERVIEW - COMPONENTS OUTSIDE OF VEHICLE INTERIOR .
-- Evacuate the filler hose.
Connect filler hose with quick-release couplings to refrigerant circuit service connections.
Risk of damaging the A/C compressor or the A/C service station.
A short circuit between the high and low pressure side is possible when opening the valves with the A/C system is on.
- Never open the valves in the high or low pressure side when the A/C system is on.
-- Only tighten the hand wheel in the quick-release coupling just enough so the service connection is open. Watch the pressure gauge and do not place too much pressure on the valve.
-- Start the engine and perform the planned tests and measurements.
-- Compare values determined to specified measured values. Refer to REFRIGERANT CIRCUIT PRESSURES, CHECKING (WITH A/C Service Station) .
-- Loosen the hand wheel to close the quick-release coupling before disconnecting it.