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

Pressures, checking on vehicles
Página 20 de 33
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- At absolute pressure, 0 bar
corresponds to absolute vacuum.
Normal ambient pressure equals 1
bar absolute pressure. 0 pressure
corresponds to an absolute
pressure of one bar on most
pressure gauges (indicated by -1
bar below 0).
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.
- 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
- Activation of A/C Compressor
Regulator Valve N280
malfunctioning
- Not enough refrigerant in
refrigerant circuit.
Corrective action
- Check activation of
Compressor Regulator Valve
N280 .
- Localize leak using leak detec
and eliminate.
- Re-charge refrigerant circuit.
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13/2/2005