Audi A4: Laws and Regulations
Refrigerant Circuit, Converting R12 to R134a and Servicing
Note
- For environmental reasons and on account of the
corresponding legislation, refrigerant R12 can no longer be
manufactured or supplied. Refrigerant R134a has been developed
as a replacement for R12.
- A/C systems developed and designed for refrigerant R12
cannot however simply be charged with refrigerant R134a. To
ensure trouble-free operation of the air conditioning system
even after conversion, various components of the refrigerant
circuit must be replaced.
- A precise description of the conversion procedure and
information on the servicing of converted refrigerant circuits
can be found in Repair Manual: Air Conditioner with Refrigerant
R12 Parts 2 and 3. (This repair manual is only available in hard
copy).
Refrigerant, Keeping Records
The environmental statistics law requires records to be kept
on the use of refrigerants.
Consequently, motor vehicle workshops may well have to
provide the relevant local authorities with information on their
use of refrigerant. It is recommended to always keep a record
sheet.
Note
- A record sheet no longer needs to be kept in the EU due to a
provision by the European Parliament in 2005. A record sheet is
currently necessary when a use of 50 kg or more in the year (see
also Provision (EU) no.1005/2009).
- It is recommended to keep a record sheet because the local
authorities can request information regarding refrigerant use
starting from a certain amount (currently starting with a use of
20 kg in a year).
- Other provisions may apply in countries that are not members
of the EU.
READ NEXT:
Air conditioning systems designed for refrigerant R12 are
only to be filled with refrigerant R134a if certain requirements
are fulfilled. Refer to
→ Chapter "Refrigerant Circuit, Convertin
SEE MORE:
Fin comb
Fill hoses
5/8"-18 UNF thread
Note
Use differently colored charging hoses (1800 mm long).
Have valve opener and spare seals to hand.
A charging hose in short version is also included in
Refrigerant Circuits Adapter Set 1 -VAS6338/1-.
Connection piece for refrigerant cylinder
Note
On vehicles with a high-voltage system but without a heat
pump (for example on Audi A3 e-tron, Audi Q5 hybrid, Audi A6
hybrid and Audi A8 hybrid) no check valves are installed in the
refrigerant circuit. On these vehicles valves are installed in
the refrigerant circuit which regulat