Volkswagen Golf Quiz
Air conditioning system with refrigerant R134a

Evacuating refrigerant circuit using air conditioner service station

In this manual: Air conditioning system with refrigerant R134a
General body repairs, exterior — 230General body repairs, interior — 279General information, paint — 133Vechile- specific paint information — 27Heating, air conditioning — 156Auxiliary heater — 58Air conditioning system with refrigerant R134a — 1297- speed dual clutch gearbox 0CW — 544- cylinder injection engine(1.4 1 direct inction. turbocharger) — 182Fuel supply system - Petrol engines — 59Running gear, axles, steering — 221Brake system — 92Wheels and Tyres guide — 12Guide for using trailers — 11Wheels and Tyres Guide - General Information — 121Brake system (hybrid) — 73Electrical system — 326Communication — 65Electrical system, general information — 111
~2min read

Always follow the procedure described in the user's manual for your air conditioner service station. The procedure described here is that for air conditioner service station -VAS 6007A-. Before the refrigerant circuit is charged with refrigerant, it should be evacuated (air empty) for 45 minutes for single evaporator system and 60 minutes for 2 evaporator systems. In addition, all moisture should be extracted from the circuit.

Leakage can be determined when evacuating the refrigerant circuit.

Evacuating:

Caution The engine must not be started during the evacuation procedure and as long as there is a vacuum present in the refrigerant circuit. The air conditioner compressor may be damaged if the engine is started when a vacuum is present in the refrigerant circuit.

Only start engine when refrigerant circuits are charged.
  • Switch off ignition.
  • If necessary, check the refrigerant oil quantity in the refrigerant circuit; see vehicle-specific repair manual → Rep. gr.87.
  • Connect air conditioner service station to power supply.
  • Check the refrigerant quantity in the air conditioner service station.
  • Connect the charging hose of the air conditioner service station to the vehicle refrigerant circuit using quick-release coupling adapters (see vehicle-specific refrigerant circuit).

→ Rep. gr.87

  • Turn the handwheel of the quick-release coupling adapter far enough inwards to ensure that the valves on the service connections are open (do not overstress the valve).
Note Where a vehicle has a service connection on only one side of the refrigerant circuit, if the system pressure has to be measured after charging, use the valve adapter and charging hose with valve opener.
  • Initiate the vacuum phase on the air conditioner service station. The refrigerant circuit will be evacuated automatically (observe preset evacuation period).
When the vacuum phase has been completed, the leakage test of the refrigerant circuit will start. The displays show the vacuum in bar and the time in seconds.

If the vacuum is not maintained, proceed as follows:

  • Initiate the vacuum phase on the air conditioner service station again. The refrigerant circuit will be evacuated automatically (observe preset evacuation period). Observe vacuum gauge for a longer period. Charging may be done only when vacuum is maintained.
If a leak is present of a magnitude where air enters during the evacuation phase so that the air conditioner service station cannot create sufficient vacuum or the vacuum gauge indicates an ingress of air so that the vacuum collapses immediately after switching off the air conditioner service station.
  • Search for the leak in the refrigerant circuit as follows: → Chapter

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