Bentley Volkswagen.Golf.Jetta.R32.Official.Factory.Repair.Manual.1999-2005

General information for A/C system
Página 17 de 19
- The engine is only to be started following complete
assembly of the refrigerant circuit.
- If possible start engine only with a filled refrigerant circuit.
- A/C compressor is driven permanently by the ribbed belt
pulley/torsion elastic clutch (not installed with an A/C
clutch):
- If an A/C compressor locks-up the overload safeguard for
the A/C compressor shaft is triggered. Also if no outward
bulges are visible on ribbed belt pulley/ overload safeguard,
it may also be that the A/C compressor is locked up.
Another indicator is abraded rubber material in the area of
the ribbed belt pulley/overload safeguard
- The A/C compressor is equipped with a protected oil
supply, this prevents A/C compressor damage in the event
that the system is empty. This means that approx.40 to 50
cm 3 of refrigerant oil remains in the A/C compressor.
- The engine should only be started when the refrigerant
circuit is completely and properly installed. For example; if
the refrigerant lines are not connected to the A/C
compressor, when the engine is running the A/C
compressor may heat up (via internal heat generation) so
much that the compressor will be destroyed.
- A/C Compressor Regulator Valve N280 is not activated
when the refrigerant circuit is empty and the A/C
compressor idles with the engine.
- If it is necessary to start the engine with a discharged
refrigerant circuit:
- Refrigerant circuit must be fully assembled.
- At least 1 4 of the prescribed refrigerant oil must be in the
A/C compressor.
- Engine speed should not increase above 2500 RPM.
- The engine should only run as long as absolutely
necessary
O-ring seals
- Make exclusive use of seals which are resistant to
refrigerant R134a and the related refrigerant oils. Color
coding of O-rings is no longer employed. Colored and black
O-rings are used.
- For used O-rings, make sure inner diameter is correct.
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13/2/2005