VW Golf manuals

Volkswagen Golf Service & Repair Manual: Checking

Switch off ignition.
–  Connect manifold gauge (air conditioner service station).
–  Read pressure gauge. It may display two results, A and B.
   
Ambient temperature in degrees centigrade Pressure in the refrigerant circuit in bar positive pressure
+15°C 3.9
+20°C 4.7
+30°C 6.7
+40°C 9.1
 
A- The pressure in the refrigerant circuit is less than shown in the table, (insufficient refrigerant in the circuit).
- Check for leaks using leak detector.
- The high-pressure safety valve has opened; check the activation for the radiator fan referring to the current flow diagram.
Check refrigerant pipes and refrigerant hoses for bends that have too tight radius (restrictions in cross-section) and for external damage. If no faults are found, purge the refrigerant circuit.
B- The pressure in the refrigerant circuit is greater than or equal to the value in the table.
–  Start engine.
–  Set air conditioning system to maximum cooling power.
–  Open doors.
–  Open vents in dash panel.
The air conditioner compressor is driven by the engine, via the V-belt and magnetic clutch.
  Note
If the air conditioner compressor is not being driven, check the power supply for the air conditioning system magnetic clutch -N25- in accordance with the current flow diagram.
If power supply is OK, repair magnetic clutch.
If the air conditioner compressor is not being driven, check the refrigerant circuit:
–  Raise engine speed to 2,000 rpm.
–  Observe the manifold gauge.

Specifications

High-pressure side:
Increasing from the pressure when the engine is stopped to a maximum of 20 bar positive pressure.
Low-pressure side:
Decreasing from the pressure when the engine is stopped to 1.3 bar positive pressure.
Test prerequisites
Radiator and condenser must be clean (clean them if necessary). The V-belt for air conditioner compressor and alternator is correct ...

Checking systems with a restrictor and reservoir and air conditioner compressor regulating valve -N280- (with externally regulated air conditioner compressor)
  Note Connecting air conditioner service station → Chapter. Observe the test prerequisites → Cha ...

Other materials:

Removing and installing exhaust camshaft oil seal, pulley end, engine codes CPTA, CHPA, CZEA, CZDA
Special tools and workshop equipment required     Assembly tool -T10478 B- Removing –  Detach toothed belt from camshafts → Chapter ...

Assembly overview - belt pulley, Sanden air conditioner compressor
1 -  Nut 25 Nm   Note In order to protect the thread of the air conditioner compressor drive shaft an additional plastic cap is fitted (not shown in illustration). –  To unfasten and tighten the hex ...

Removing and installing gas strut
Removing –  Open and support bonnet.   WARNING Proceed with care if gas strut is reused. Spring clip must not be levered completely out of ball socket, as it will otherwise be damaged. Gas strut will spring ou ...

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