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Possible devia‐
tion from specifi‐
cation
Possible cause of
fault
Corrective action
♦ Constriction or
obstruction in re‐
frigerant circuit
(for example, in‐
side the refriger‐
ant line between
the Service con‐
nection, low pres‐
sure side, and the
A/C compressor).
– Clean refrigerant
circuit (flush with re‐
frigerant R134a, re‐
fer to
⇒ “1.4.13 Refriger‐
ant Circuit Flushing
With Refrigerant
R134a“, page 32 or
blow through with
compressed air and
nitrogen, refer to
⇒ “1.4.12 Refriger‐
ant Circuit Flushing
With Compressed
Air and Nitrogen “,
page 29 ).
– Replace hose or
pipe if kinked or
constricted
♦ A/C compressor
faulty.
– Replace A/C com‐
pressor.
Note
♦
Make sure the A/C compressor (the A/C compressor shaft) is
actually being driven by the belt pulley/drive unit. Refer to ⇒
Heating, Ventilation and Air Conditioning; Rep. Gr. 87 ; Diag‐
nosis and Testing (vehicle-specific repair manual).
♦
As of MY 12, certain engines and A/C compressors that in ad‐
dition to the A/C compressor regulator valve, have an A/C
clutch -N25- attached to the belt pulley. Make sure the A/C
clutch really is being actuated and the A/C compressor (A/C
compressor shaft) is being driven by the belt pulley. Refer to
⇒ Heating, Ventilation and Air Conditioning; Rep. Gr. 87 ;
Diagnosis and Testing (vehicle-specific repair manual) and to
the Electronic Parts Catalog (ETKA).
Audi 100 1991 ➤ , Audi 80 1992 ➤ , Audi A1 2011 ➤ , Audi A2 2001 ➤ , A ...
Refrigerant R134a Servicing - Edition 01.2011
184 Rep. Gr.00 - General, Technical Data
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