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

Pressures, checking on vehicles
Página 26 de 33
- 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.
- Not enough refrigerant in
refrigerant circuit.
- Extract refrigerant from
refrigerant circuit.
- If quantity of refrigerant extrac
is substantially less than specif
capacity.
- Localize leak using leak detec
and eliminate.
- Re-charge refrigerant circuit.
- Repeat test.
- If quantity of refrigerant extrac
roughly corresponds to specifie
capacity:
- Expansion valve malfunctioning - Replace expansion valve.
- Re-charge refrigerant circuit.
- Repeat test.
Note:
- If no malfunction is found in
relation to this complaint, flush
refrigerant circuit with compressed
air and nitrogen.
- Check measured values of
Evaporator Vent Temperature
Sensor G263 and activation of A/C
Compressor Regulator Valve
N280 . If measured value of High
Pressure Sensor G65 is not OK,
evaporator may ice up or cooling
output is not attained.
- If the function of the air
conditioning system is not OK
when the test is repeated after
replacing expansion valve, reinstall
old expansion valve and
flush refrigerant circuit with
compressed air and nitrogen.
Then replace A/C compressor and
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13/2/2005