Detecting Leaks In Refrigerant Circuit - Volkswagen Amarok 2011 Workshop Manual

Amarok 2011 ➤ , Beetle 2012 ➤ , Bora 1999 ➤ , CC 2010 ➤ , CC 2012 ➤ , ...
6

Detecting leaks in refrigerant circuit

Note
Different processes are described in this workshop manual for
♦
leak detection in the refrigerant circuit. These processes have
been tested and lead to a positive result under the different
conditions of use if the application is carried out correctly and
in accordance with the complaint.
When leak detection using compressed air/nitrogen or vac‐
♦
uum does not produce results, use electronic leak detector or
UV leak detector additive.
Small leaks can be detected with, for example, an electronic
♦
leak detector or a UV leak detector lamp.
A wide range of processes are offered on the open market for
♦
finding leaks in refrigerant circuits. These processes do not
always produce conclusive results. If they are not used pre‐
cisely according to the specifications, they may even cause
components of the refrigerant circuit to develop leaks where
there were none before. Furthermore, certain processes can
cause preliminary or permanent damage to the components
of the refrigerant circuit
Components that are found to be leaking must not be repaired.
♦
They have to be replaced with genuine parts.
A leaking refrigerant circuit must not be charged with refriger‐
♦
ant, therefore evacuate an empty refrigerant circuit and check
for leaks before charging the system with refrigerant
⇒ page 50 .
Caution
♦ If there is evidence to suggest that chemical substances
have been added in the vehicle to seal leaks, do not con‐
nect 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 sub‐
stances in his/her air conditioning system that do not have
VW approval. This air conditioning system cannot be
drained or repaired by you.
Air conditioning system with refrigerant R134a - Edition 10.2014
6. Detecting leaks in refrigerant circuit
55