Volkswagen Golf Service & Repair Manual: Test prerequisites
| Radiator and condenser must be clean (clean them if
necessary). |
| The heat insulation on expansion valve is OK and properly
installed. See vehicle-specific repair manual
→ Rep. gr.87. |
| The poly V-belt is OK and properly tensioned. The V-belt for
air conditioner compressor and alternator is in good condition
and correctly tensioned. See vehicle-specific repair manual
→ Rep. gr.87 |
| All air ducts, covers and seals are OK and properly
installed. |
| Fault-finding on the electrical systems and vacuum system
has found no faults. See vehicle-specific repair manual
→ Rep. gr.87 |
| Self-diagnosis of the air conditioning system with the
vehicle diagnosis, testing and information system -VAS 5051A-
using “guided fault finding” cannot detect any faults; no
switch-off conditions for the air conditioner compressor are set
in the measured value block (only when the vehicle “air
conditioning system” is fitted with self-diagnosis). |
| The passage of air through the dust and pollen filter is not
impaired by dirt. See vehicle-specific repair manual
→ Rep. gr.87 |
| The heater and air conditioner does not draw any secondary
air at highest fresh air blower speed. The evaporator and
heating do not draw any uncooled air at highest fresh air blower
speed. See vehicle-specific repair manual
→ Rep. gr.87 |
| The air duct flaps in the heater and air conditioner reach
their stop positions. See vehicle-specific repair manual
→ Rep. gr.87 |
| The fresh air intake ducts under the bonnet and in the
passenger compartment and their water drain valves are in good
condition. See vehicle-specific repair manual
→ Rep. gr.87 |
| The engine is at operating temperature. |
| The vehicle is not exposed to direct sunlight. |
| The ambient temperature is higher than 15°C. |
| All dash panel air vents are open. |
| With engine running and air conditioning set for maximum
cooling output: |
| Setting maximum cooling output |
| Settings on operating and display unit for Climatronic air
conditioning system -E87- |
| – |
Select “Auto” mode (air conditioner compressor switched on). |
| – |
Select temperature setting “LO” for driver and front
passenger. |
| Settings on heater controls: |
| – |
A/C button and Rec or recirculate buttons should be pressed. |
| – |
Set rotary temperature switch to “Cold” stop. |
| – |
Set rotary fresh air blower switch to “4”. |
| The radiator fan(s) should be running radiator fan -V7- (at
least at speed 1).* |
 Note
| In some versions, the fan is not switched on until the
pressure in the refrigerant circuit has exceeded a specified
value. |
| The fresh air blower -V2- should be running at maximum
speed. |
| The air flap for fresh air and air recirculation moves to
the “recirculation” position or the air flow flap closes and the
recirculation flap opens (within 1 minute of starting the
vehicle). |
| The coolant shut-off valve is closed. * |
| The valves for the pump valve unit are closed (and the
coolant circulation pump is not pumping).* |
|
|
|
Note
Check the cooling performance. The air conditioning system
is operating correctly if the air emerging from the vent on the
dashboard is at a ...
Switch off ignition.
–
Connecting air conditioner service station
→ Chapter.
–
Read pres ...
© 2016-2020 Copyright www.vwgolf.org
Checking pressures in refrigerant circuit (using air conditioner service
station)
Checking pressures