Volkswagen Polo Service & Repair Manual: A/C Service Station, Emptying
Caution
| If it is suspected that chemicals were added to the
refrigerant circuit to seal leaks, do not connect the
A/C service station and do not extract the refrigerant. |
| Chemicals that seal leaks in the coolant circuit
form deposits that affect the function of the A/C system
and lead to failure of the A/C system and the A/C
service station. |
| Inform that customer that there are substances in
the A/C system that are no approved by Volkswagen. This
A/C system cannot be drained or serviced in the
workshop. |
|
 Note
| The chemical materials (stop leak additive) for sealing
leaks in the refrigerant circuit offered on the market are not
approved by VW Audi AG. There are no permanent- ,validity or
material compatibility tests. Therefore damage or malfunctions
in the A/C system or the A/C Service Station cannot be excluded. |
| The stop leak additives offered on the open market have
different physical and chemical properties, which can impair the
function of the A/C system and the A/C Service Station and can
even shut down the system completely. |
| VW does not approve the use of chemicals to seal leaks in
the refrigerant circuit. |
| Chemicals used to seal leaks in the refrigerant circuit
often react with air and the moisture in it. They cause deposits
in the refrigerant circuit and the A/C service station and
malfunctions in valves and other components that they come in
contact with. These deposits cannot be removed completely from
the components. |
| Chemicals used to seal leaks in the refrigerant circuit
usually cannot be detected from outside. The label that should
be applied to identify it is often missing. Therefore be careful
when working with if you do not know its service history. |
| Accessories offer containers used to separate out these
chemicals (used to seal leaks in the refrigerant circuit).
Because VW does not approve the use of these chemicals, there is
no evidence of the effectiveness of these filters. |
Note
| If it is necessary to evacuate the A/C service station (e.g.
because contaminated refrigerant was extracted), always replace
all filters and dryers. Only remove the filters and dryers from
their air-tight packaging immediately before installing them to
prevent moisture from entering. |
| Refrigerant containers filled with contaminated used
refrigerant are referred to as “Recycling containers”. |
| Always evacuate recycling cylinders before first charging
with refrigerant. Refrigerant cylinders in which there is air
must not be filled with refrigerant. |
| Different refrigerant types must not be mixed together.
Refrigerant mixtures cannot be reprocessed but must be disposed
of. If there is any doubt about the composition of the contents
of the container, the refrigerant recycling company is to be
informed accordingly. |
WARNING
| When filling recycling containers (compressed-gas
vessels), observe applicable regulations, technical
rules and laws. |
| Recycling containers are never to be overfilled.
Overfilled containers do not have a sufficient gas
cushion to accommodate the liquid expansion caused by
the effects of heat. There is a danger of rupture. |
| To ensure safety, make exclusive use of recycling
containers fitted with a safety valve. |
| Recycling containers must be weighed on calibrated
scales during the filling process. The maximum
permissible capacity is 75% (charge factor 0.75) of the
charge weight indicated on the recycling container (the
possibility of refrigerant oil entering the recycling
container along with the refrigerant cannot be ruled
out). |
|
|
Caution
If it is suspected that chemicals were added to the
refrigerant circuit to seal leaks, do not connect the ...
Other materials:
Contaminants Removed from Refrigerant Circuit
The reservoir/receiver/dryer or dryer bag/cartridge should
not be replaced under the following conditions.
After an accident when there is no damage on the
reservoir/receiver/dryer.
The repair was done quickl ...
Releasing and Disassembly Contact Housings, General Information
Note
Observe general notes for repairs on the vehicle electrical
system. Refer to
→ Chapter „Vehicle Electrical System, General Repair
Information“.
Always use the release tools intended for the ...
Oxygen Sensor Unit Protective Pipes
Note
In addition to using the part number, the protective pipe
can also be used for identification.
Version D1, 6 openings, 3.5 mm each
Only used with the 4-pin oxygen sen ...
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Refrigerant in A/C Service station Container, Filling