Safety Precautions For Vehicles With Start/Stop System; Refrigerant Circuit, Draining - Audi Q7 2007 Repair Manual

are similarly to be rinsed thoroughly in cold water without delay
for at least 15 minutes.
Although refrigerant does not represent a fire hazard, smoking,
welding, soldering and brazing are not permitted in areas exposed
to refrigerant.
Reason:
The high temperature of a naked flame or hot objects causes de‐
composition of refrigerant gas. Inhalation of the resultant toxic
decomposition products leads to dry coughing and nausea.
1.3 Safety Precautions for Vehicles with
Start/Stop System
WARNING
On vehicles with the Start/Stop System, the engine could start
automatically and cause serious personal injury.
♦ If the Start/Stop System is activated (recognizable by a
message in the instrument cluster), it is possible to start
the engine automatically.
♦ Make sure the Start/Stop System is deactivated (ignition
switched off) whenever working on the vehicle.
1.4

Refrigerant Circuit, Draining

Refrigerant is never to be allowed to escape into the atmosphere,
but rather it is to be extracted from the refrigerant circuit using an
extractor or service station. The drained refrigerant will be locally
recycled or is send to an environment-recycling place to the man‐
ufacturer (different or additional laws may apply in individual
companies). For this reason, bring the vehicle to a workshop that
has the necessary tools and in which the work can be performed
accordingly by qualified personnel. Refer to ⇒ Refrigerant R134a
Servicing; Rep. Gr. 87 ; A/C System General Information (A/C
System with Refrigerant R134a; A/C System, General Informa‐
tion).
Reason:
If refrigerant R134a is released into the environment, it enhances
the »green house effect«.
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with respect to the correctness of information in this document. Copyright by AUDI AG.
Note
Refrigerant R134a has far less of a greenhouse effect than
♦
R12.
Because R-134a does not contain chlorine atoms, the major
♦
catalyst in ozone depletion, R134a has no ozone depletion
potential. Depletion of the ozone layer in the upper atmos‐
phere is however only brought about by the splitting of carbon–
chlorine bonds (as is the case, for example, with refrigerant
R12).
After discharging the A/C system, disconnect the harness con‐
nector from A/C Compressor Regulator Valve - N280- or from the
High Pressure Sensor - G65- .
Reason:
The A/C Compressor Regulator Valve - N280- is then no longer
activated and compressor runs at idle. The compressor is de‐
signed such that lubrication of compressor components is guar‐
Heating, Ventilation and Air Conditioning - Edition 04.2013
Audi Q7 2007 ➤
1. A/C and Refrigerant Safety Precautions
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