Service Station, Connecting For Measurement and Testing

Service Station, Connecting For Measurement And Testing

- Work procedure may vary depending on the type of tools selected (the tool-specific operating instructions should therefore be followed).

NOTE: The work procedure is always to be performed as described in the operating instructions for the A/C service station VAS 6007A (or subsequent models).

The charging hoses are to be connected as follows to prevent the ingress of air or moisture into the refrigerant circuit:
- Switch off ignition.
- Connect service station to power supply.
- Remove sealing caps from service connections or connections with valve.
- Evacuate charging hoses if necessary.

NOTE: Connect filler hose with quick-release couplings to refrigerant circuit service connections.

CAUTION:
- A/C compressor or A/C service station may be damaged if quick-release couplings are opened.
- With engine running and quick-release coupling open, there is a "short circuit" between the high and low pressure side in the refrigerant circuit.
- Engine must not be running or quick-release couplings at service connections must be closed.

- Open quick-release couplings on the service connections.

on vehicles that have a connection on the low and high pressure side of the refrigerant circuit
- Switch off ignition.
- Connect service station to 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 service station.
- Remove caps from service connections (with valve).
- Connection service station with service connections with quick-release coupling adapters on vehicle refrigerant circuit.
- 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.