Audi Q5: A/C System, General Information
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The purpose of this repair manual is to provide service
advisors and technicians with the basic knowledge needed to
ensure professional and competent procedures.
Note
Only the careful study
Physical Principles
The four known states of water also apply to air
conditioning system refrigerants.
1 - Gaseous (invisible)
2 - Vapor
3 - Liquid
4 - Solid
Refrigerant R134a Physical Data
Vehicle air conditioning systems make use of the
vaporization and condensation process. In this case, one works
with a substance which boils easily, designated as ref
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The refrigerant circuit was completely empty (for example
with larger leak or cracked hose)
Note
In the event of only a minor leak with slow escape of
refrigerant (e.g. at a small leakage point), the amount of
refrigerant oil lost and the amount of moisture penetrating is
not sufficien
New engine
The engine needs to be run-in during the first 1,000 miles (1,500 km).
For the first 600 miles (1,000 kilometers):
Do not use full throttle.
Do not drive at engine speeds that are more than 2/3 of the maximum
permitted RPM.
From 600 to 1,000 miles (1,000 to 1,500 kilometers):
Spee
