Introduction
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 c
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
WARNING
Risk of injury. Follow all warning messages and
safety precautions. Refer to
→ Chapter "Warnings and Safety Precautions".
In order to prevent damage to the Battery -A- or
vehicle, observe the battery type information. Refer to
→ Chapter "Battery Types".
WAR
General Information
Only valves and connections that are resistant to
refrigerant R134a and refrigerant oil must be installed.
Different connections (outer diameter) for high pressure and
low pressure side.
Discharge the refrigerant circuit before removing valves or
valve inserts.
Always scr