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

Pressures, checking on vehicles
Página 9 de 33
D - Low pressure (measured at
connection with valve for lowpressure
switch or at service
connection) in bar.
E - Permissible tolerance range.
Possible deviation from
specification
- High pressure remains constant
or only increases slightly (above
pressure with engine stopped),
- Low pressure quickly drops to
value in graph or below,
- Required cooling output is not
attained.
- High pressure normal,
- Low pressure in line with value in
graph,
- Required cooling output is not
attained.
- High pressure normal,
- Low pressure too low (see
graph),
- Required cooling output is not
attained.
Note:
- If no malfunction is found in
relation to this complaint, flush
refrigerant circuit with compressed
air and nitrogen.
Possible cause
Not enough
refrigerant in
refrigerant circuit.
Corrective action
- Localize leak using leak detector
and eliminate.
- Re-charge refrigerant circuit.
Possible deviation from
specification
- High pressure only increases
slightly above pressure with
engine stopped,
- Low pressure only drops slightly,
Possible cause
A/C compressor
malfunctioning.
Corrective action
- Flush refrigerant circuit with
compressed air and nitrogen.
- Replace compressor.
- High press
specification
- Low pressu
value in grap
- Required cooling output is not
attained.
- Required c
attained.
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13/2/2005