Volkswagen Golf 1999 Service Manual page 4023

Refrigerant circuit
- Initiate vacuum phase on the service station. Refrigerant
circuit is evacuated automatically.
Once vacuum phase has ended, begin testing refrigerant
circuit for proper seal. Negative pressure in bar and
seconds will be displayed.
Proceed as follows if the vacuum is not maintained:
- Fill the circuit with 100 g of refrigerant, localize any leaks
using leak detection system VAS 6196 and eliminate
accordingly.
Leak detector V.A.G 1796 can also be used.
- Evacuate refrigerant circuit once more. Only when the
vacuum is maintained can the refrigerant circuit be
charged.
Refrigerant circuit, charging using service
station
- The work procedure is always to be performed as
described in the operating instructions for the A/C service
station.
- Before pouring in refrigerant, correct the quantity of
refrigerant oil
Repair Manual, Heating & Air Conditioning, Repair
Group 87 ,
.
- The entire refrigerant charge can be added to either the
high or low pressure side.
Charging refrigerant circuit
- Switch ignition off.
- Evacuate refrigerant circuit using service station
Refrigerant circuit, evacuating using service station
- Screw out handwheel at quick-release coupling adapter
(to close it).
- Allow refrigerant to flow into charging hose.
- Screw in handwheel at quick-release coupling adapter (do
not strain valve) and charge with the specified quantity of
refrigerant.
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Página 6 de 11
13/2/2005