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Air conditioning systems with refrigerant R1234yf - General information - Edition 07.2017
2
Working with air conditioner service
station
⇒ “2.1 Working with air conditioner service station”, page 129
⇒ “2.2 Connecting air conditioner service station to refrigerant lk
circuit”, page 131
⇒ “2.3 Performing gas analysis of refrigerant”, page 134
⇒ “2.4 Emptying refrigerant circuit”, page 137
⇒ “2.5 Evacuating refrigerant circuit”, page 140
⇒ “2.6 Charging refrigerant circuit”, page 146
⇒ “2.7 Bringing air conditioning system into service after charg‐
ing”, page 149
⇒ “2.8 Switching off air conditioner service station and separating
from refrigerant circuit”, page 151
⇒ “2.9 Charging refrigerant in reservoir”, page 153
⇒ “2.10 Emptying air conditioner service station”, page 154
⇒ “2.11 Cleaning electrical air conditioning compressor”,
page 155
⇒ “2.12 Cleaning refrigerant circuit”, page 157
⇒ “2.13 Filling contaminated refrigerant in a recycling cylinder for
analysis, processing or disposal”, page 161
⇒ “2.14 Checking pressures”, page 170
2.1
Working with air conditioner service sta‐
tion
Note
♦ Should there be any reason to believe that chemical substan‐
ces (leak stop additives) have been used to seal leaks in the
refrigerant circuit from which refrigerant is to be extracted, do
not connect the air conditioner service station to this refriger‐
ant circuit 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 con‐
ditioning system and cause the air conditioning system (and
your air conditioner service station ) to fail.
♦ Bring the customer's attention to the presence of substances
in the air conditioning system that are not approved by Volks‐
wagen/Audi, which prevent the air conditioning system from
being flushed and repaired.
♦ Volkswagen/Audi does not authorise the use of chemical sub‐
stances (leak stop additives) for purposes of sealing leaks in
refrigerant circuits. There are currently no long-term tests, ef‐
fectiveness or material-compatibility tests. As such, there is no
way of ruling out damage or malfunctions in an air conditioning
system or air conditioner service station .
♦ The leak stop additives currently available on the market have
different physical and chemical properties. These could impair
the function of the air conditioning system and air conditioner
service station with lasting effect or even cause a total failure.
VW/Volkswagen/Audi does not endorse the use of chemical
substances (leak inhibitor additives) for purposes of sealing
leaks in refrigerant circuits.
2. Working with air conditioner service station
129
English 
