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Air conditioning systems with refrigerant R1234yf - General information - Edition 07.2017
cles that were type approved before 2011 into operation for
the first time with R134a refrigerant is 31.12.2016 (this applies
to countries within the EU, different regulations may apply in
countries outside the EU).
♦ After 01.01.2011, vehicles will only be given a new type ap‐
proval if the refrigerant used in the refrigerant circuit of their
air conditioning system has a GWP of less than 150. R1234yf
refrigerant has a GWP of approx. 4 and is therefore markedly
below the prescribed level.
♦ From 2011, the air conditioning systems of newly manufac‐
tured cars have been successively changed from R134a re‐
frigerant to R1234yf refrigerant. This refrigerant has a global
warming potential of approx. 4. The GWP of carbon dioxide =
lk
1 (global warming potential) and has much less of an impact
on the earth’s atmosphere than R134a refrigerant.
♦ Conversion programmes have been developed for old sys‐
tems filled with the ozone-depleting substance R12 ⇒ Work‐
shop manual for air conditioners with R12 refrigerant (this
workshop manual is available in paper form only).
♦ According to current legislation, R134a refrigerant may still be
charged in vehicles that were type approved for use with
R134a refrigerant (or in vehicles converted from R12 refriger‐
ant to R134a refrigerant) until these vehicles are decommis‐
sioned. No provision has currently been made, therefore, to
convert air conditioning systems from R134a refrigerant to
R1234yf refrigerant ⇒ Air conditioning systems with R134a
refrigerant; Rep. gr. 87 ; Capacities for R134a refrigerant, re‐
frigerant oil and approved refrigerant oils .
♦ To protect the environment, no refrigerant should be released
into the atmosphere
⇒ “2 Legal texts and regulations”, page 5 .
♦ R1234yf refrigerant is chemically stable in an enclosed sys‐
tem. In the earth’s atmosphere, however, it decomposes with‐
in a short space of time (within approx. 14 days) by the
influence of UV light into compounds that do not harm the
earth’s atmosphere (hence the GWP of 4).
6.5
Other reference material
♦ Workshop manual for model-specific maintenance work ⇒
Heating, air conditioning system; Rep. gr. 87 ; Overview of
fitting locations - air conditioning system (vehicle-specific
workshop manual) and ⇒ Current flow diagrams, Electrical
fault finding and Fitting locations
♦ Technical Service Handbook with measures for rectifying lat‐
est malfunctions
♦ Self-study Programmes, videos for workshop training and VW/
Audi TV episodes on the air conditioning system.
♦ The specific risks of refrigerant, material data etc. can be
gleaned from the safety data sheets. Safety data sheets about
refrigerant, refrigerant oil etc. ⇒ VW / Audi ServiceNet .
♦ List of relevant special tools and workshop equipment for re‐
pairs to air conditioning systems ⇒ Electronic parts catalogue
(Tools; Workshop equipment/tools; Heating, air conditioning
system).
♦ Information about the disposal of refrigerant oil and contami‐
nated refrigerant can be found on ⇒ VW / Audi ServiceNet .
♦ For vehicles whose refrigerant circuit is charged with R134a
refrigerant (vehicles that were type approved before
31.12.2010 and have been or are to be commissioned for the
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Rep. gr.00 - Technical data
GETth
English 