volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

ABOUT US
Bringing air conditioning system into service after charging > < Evacuating refrigerant circuit using air conditioner service station

Golf Mk4

Charging refrigerant circuit using air conditioner service station
Charging refrigerant circuit using air conditioner service station
  WARNING
High-voltage on high-voltage system. Danger of electric shock on air conditioner compressor!
Models with a high-voltage system: now de-energise the high-voltage system → Electric drive; Rep. gr.93.
l  Always follow the procedure described in the user's manual for your air conditioner service station.
l  Before charging the refrigerant, check the refrigerant oil quantity → Rep. gr.87.
l  The entire refrigerant charging quantity can be introduced either into the high-pressure or the low-pressure side.
Charging the refrigerant circuit.
–  Switch off ignition.
–  Evacuating refrigerant circuit using air conditioner service station → Chapter.
–  Turn handwheel of quick-release coupling adapters outwards (close).
–  Allow refrigerant to flow into charging hose.
–  Turn handwheel of quick-release coupling adapter inwards (do not overstress the valve) and charge system with prescribed quantity of refrigerant.
–  Switch off air conditioner service station.
  Note
If the air conditioner compressor was removed, the V-belt pulley /freewheel must be turned by hand approx. 10 times prior to initial operation. This prevents any damage occurring from a fluid hammer in the air conditioner compressor when the air conditioning system is switched on for the first time. If there is oil in the cylinder of the air conditioner compressor, it will be forced out by the rotation.
–  Start engine with air conditioner compressor switched off (if it is the type with a magnetic clutch).
–  Set air conditioner compressor to lowest possible setting; select "Econ" mode or A/C Off (if version without magnetic clutch, but with regulating valve).
–  Wait until idling speed has stabilised.
–  Switch air conditioner compressor on and let system run for at least 2 minutes with engine idling.
–  If necessary, check pressures in refrigerant circuit using air conditioner service station.
–  Switch off engine.
–  Turn out handwheel on quick-release coupling adapter.
–  Detach the charging hose from the refrigerant circuit.
–  Screw on sealing caps again.
   

Bringing air conditioning system into service after charging > < Evacuating refrigerant circuit using air conditioner service station