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– Remove defective part, purge with compressed air and collect
escaping refrigerant oil.
– A quantity of fresh refrigerant oil equal to the quantity of re‐
frigerant oil that has been blown out (plus 20 cm
3
for the
evaporator, plus 10 cm
3
for the condenser, refrigerant pipes
and refrigerant hoses) should be poured into the new compo‐
nent.
– Renew restrictor. Depending on vehicle
– Assemble refrigerant circuit, evacuate and charge.
11.2 Renewing air conditioner compressor
Note
On vehicles equipped with an electrical air conditioner compres‐
sor, de-energise the high-voltage system before removing the air
conditioner compressor. ⇒ Electric drive; Rep. gr. 93 ; Electric
drive; De-energising high-voltage system
11.2.1 Without needing to purge refrigerant cir‐
cuit of contaminants (cleaning), e.g. in
cases of external damage after an acci‐
dent
– Drain refrigerant circuit.
– Remove air conditioner compressor.
Note
If a different air conditioner compressor with other refrigerant oil
is fitted, purge the refrigerant circuit with R134a refrigerant
⇒ page 67 .
Electrical air conditioner compressor:
If an electrical air conditioner compressor is renewed without hav‐
ing a mechanical fault (e.g. defective printed circuit board), the
amount of refrigerant oil from this electrical air conditioner com‐
pressor must be determined.
Note
♦
The air conditioner compressor must be purged in order to
extract the refrigerant oil which needs to be determined.
♦
Purge the air conditioner compressor in normal direction of
flow (from low-pressure inlet to high-pressure outlet).
♦
In order to purge as much refrigerant oil from the air condi‐
tioner compressor as possible make sure that the high-pres‐
sure outlet of the air conditioner compressor is in the lowest
position possible.
♦
If an air conditioner service station without purging programme
is used, the sequence has to be carried out manually (evacu‐
ate, purge 3 times with at least 2 kg of refrigerant each time
and extract refrigerant again, evacuate).
Determined amount e.g. 50 cm³
Amarok 2011 ➤ , Beetle 2012 ➤ , Bora 1999 ➤ , CC 2010 ➤ , CC 2012 ➤ , ...
Air conditioning system with refrigerant R134a - Edition 10.2014
11. Renewing components 161
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