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Possible deviation
from specification
Possible cause of fault Rectifying
fault
• High pressure nor‐
mal or too high,
• Low pressure too
high (see dia‐
gram),
• The air conditioner
compressor is
noisy (especially
immediately after
being switched
on),
• The required cool‐
ing output is not
delivered.
Too much refrigerant in
circuit.
– Extract
some re‐
frigerant
from the
refriger‐
ant cir‐
cuit.
• The
quantity
of refrig‐
erant ex‐
tracted is
about
equal to
the pre‐
scribed
charge
quantity.
– Renew
the air
condition‐
er com‐
pressor.
• The
quantity
of refrig‐
erant ex‐
tracted is
signifi‐
cantly
greater
than the
prescri‐
bed
charge
quantity.
– Recharge
refriger‐
ant cir‐
cuit.
– Repeat
check.
Possible deviation from specification Possible cause of fault Rectifying fault
• High-pressure and low-pressure
are normal,
• The required cooling output is not
delivered.
Too much refrigerant oil in circuit. – Drain refrigerant cir‐
cuit.
– Purge (clean) refrig‐
erant circuit
⇒ page 67 .
• High-pressure and low-pressure
are normal,
• The air conditioner compressor is
noisy (especially immediately af‐
ter being switched on),
• The cooling power required is de‐
livered.
Amarok 2011 ➤ , Beetle 2012 ➤ , Bora 1999 ➤ , CC 2010 ➤ , CC 2012 ➤ , ...
Air conditioning system with refrigerant R134a - Edition 10.2014
134 Rep. gr.00 - Technical data
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