Volkswagen Amarok 2011 Workshop Manual page 151

Amarok 2011 ➤ , Beetle 2012 ➤ , Bora 1999 ➤ , CC 2010 ➤ , CC 2012 ➤ , ...
Possible deviation Possible cause of fault
from specification
• High pressure ♦ Actuation of air con‐
remains con‐
stant or increa‐
ses only slightly
(above the pres‐
♦ Insufficient refriger‐
sure measured
when the engine
is stopped),
• Low pressure
falls quickly to
the diagram val‐
ue or lower,
• The required
cooling output is
not delivered.
• High pressure is
normal,
• Low pressure
matches the dia‐
gram value,
• The required
cooling output is
not delivered.
• High pressure is
normal,
• Low pressure is
too low (see dia‐
gram),
• The required
cooling output is
not delivered.
• High pressure is
normal,
• Low pressure is
too low (see dia‐
gram),
• The required
cooling output is
not delivered.
Note
If no fault can be found for this complaint, purge (clean) refrigerant
circuit with refrigerant R134a
your workshop, blow through refrigerant circuit with compressed
air and dry with nitrogen
Air conditioning system with refrigerant R134a - Edition 10.2014
Rectifying fault
– Check ac‐
ditioner compressor
regulating valve -
N280- is defective.
ant in circuit.
– Look for
– Recharge re‐
⇒ page 67 . If this is not possible in
⇒ page 65 .
tuation of air
conditioner
compressor
regulating
valve -
N280- .
leaks using
leak detector
and rectify
them.
frigerant cir‐
cuit.
10. Checking pressures on vehicles
145