Audi A2 2001 - Page 164

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Low-pressure side
Decreasing from initial pressure (when connecting pressure
gauges) to the value in the graph.
A - High pressure (measured at service connection) in bar
B - Low pressure (measured at connection with valve at com‐
pressor or accumulator) in bar
C - Permissible tolerance range
D - Low pressure (measured at connection with valve for low-
pressure switch or at service connection) in bar
E - Permissible tolerance range
Possible Deviation From Specifica‐
tion
Possible Cause Of Fault Corrective Action
• High pressure remains constant
or increases only slightly (above
pressure with engine stopped),
• Low pressure quickly drops to
value in graph or below
• Required cooling output is not at‐
tained
Not enough refrigerant in refriger‐
ant circuit
– Localize leak with leak detector
and eliminate.
– Charge the refrigerant circuit
• High pressure normal
• Low pressure in line with value in
graph
• Required cooling output is not at‐
tained
• High pressure normal
• Low pressure too low (see graph)
• Required cooling output is not at‐
tained
Note
If no fault is found with this complaint, clean refrigerant circuit
(flush using refrigerant R134a, refer to
⇒ “1.4.13 Refrigerant Circuit Flushing With Refrigerant R134a“,
page 32 or blow through using compressed air and nitrogen, refer
to
⇒ “1.4.12 Refrigerant Circuit Flushing With Compressed Air and
Nitrogen “, page 29 ).
Audi 100 1991 ➤ , Audi 80 1992 ➤ , Audi A1 2011 ➤ , Audi A2 2001 ➤ , A ...
Refrigerant R134a Servicing - Edition 01.2011
160 Rep. Gr.00 - General, Technical Data