Volkswagen Golf Service & Repair Manual: Working with the air conditioner service station
Caution
| If there is evidence to suggest that chemical
substances have been added in the vehicle to seal leaks,
do not connect the air conditioner service station and
do not extract the refrigerant. |
| Chemical substances used to seal leaks form deposits
in the refrigerant circuit. These can impair the
function of the air conditioning system and cause the
air conditioning system (and your air conditioner
service station) to fail. |
| Make your customer aware of the fact that there are
substances in his/her air conditioning system that do
not have VW approval. This air conditioning system
cannot be drained or repaired by you. |
|
 Note
| Volkswagen AG does not authorise the use of chemical
substances (leak inhibitor additives) for purposes of sealing
leaks in refrigerant circuits. There are currently no permanent,
effective or material compatible tests that guarantee never
causing damage or malfunctions in an air conditioning system or
air conditioner service station. |
| The leak inhibitor additives currently available on the
market have differing physical and chemical characteristics that
may subsequently affect the function of the air conditioning
system and air conditioner service station or even cause a total
failure. |
| Volkswagen rejects the use of chemical substances for
purposes of sealing leaks in refrigerant circuits. |
| Chemical substances used for sealing leaks in refrigerant
circuits often react with the surrounding air and the humidity
contained within. They cause deposits to build up in the
refrigerant circuit (and your air conditioner service station),
valves to malfunction and defects in other components with which
they come into contact. These deposits cannot be completely
removed from the components. |
| It is often not possible to detect from the outside whether
chemical substances have been used to seal leaks in the
refrigerant circuit. The adhesive label that serves to identify
its use can usually not be found. Therefore, exercise caution on
vehicles for which you have no service or repair record. |
| Containers or tanks are offered as accessories on the open
market that are designed to separate these chemical substances
(to seal leaks). Since Volkswagen rejects the use of these
substances, no statement can be made at this point regarding the
effectiveness and separation rate of these filters. |
|
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|
Chlorofluorocarbon (CFC) is no longer used as a refrigerant
in the automotive sector.
R12Converting refrigerant circuits from refrigerant R12 to
...
To operate the air conditioner service station -VAS 6007A-,
the following must be observed (also applies to other and latest
available air conditioner service station ...
Other materials:
Effects on metal
In its pure state, refrigerant R134a is chemically stable
and does not attack iron or aluminium.
However, impurities such as chlorine compounds in the
refrigerant do attack certain metals and plastics. This can lead
to blockages, leaks a ...
Secondary locking element
The secondary locking mechanism is a housing catch (second
line locking mechanism) that secures all the wires in one
contact housing. If a secondary locking mechanism is fitted to a
contact housing, this must always be opened or removed using the
appropr ...
Steering rack
To achieve the desired results when performing repairs on
the steering rack it is important to work with the greatest
possible care and cleanliness, and to use proper tools in good
condition. Also note the basic rules on safety when performing
repair pro ...
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Retrofitting refrigerant circuit from R12 refrigerant to R134a refrigerant
Important notes for working with the air conditioner service station