Volkswagen Golf Service & Repair Manual: Checking
– |
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. |
– |
Set air conditioning system to maximum cooling power. |
– |
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
Increasing from the pressure when the engine is stopped to a
maximum of 20 bar positive pressure. |
Decreasing from the pressure when the engine is stopped to
1.3 bar positive pressure. |
|
Radiator and condenser must be clean (clean them if
necessary).
The V-belt for air conditioner compressor and alternator is
correct ...
Note
Connecting air conditioner service station
→ Chapter.
Observe the test prerequisites
→ Cha ...
Other materials:
Introduction
This chapter contains information on the following subjects:
→ Vehicle settings menu
Additional information and warnings:
Instruments
Volkswagen information system
Central locking system
Electric windows
Lights
...
Checking tyres
As tyre damage can have serious consequences, you and the
driver should regularly check the tyres to identify any problems
at an early stage.
Damaged tyres cannot withstand driving conditions such as
high speed, long distances, sporty dr ...
General safety regulations
To prevent personal injury and material damage to the
vehicle, observe the following:
WARNING
Risk of injury and accident by accidental engagement
of gear while engine is running.
...
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