Checking Systems With An Expansion Valve, Receiver And Air Conditioner Compressor; Regulating Valve N280 (With Externally Regulated Air Conditioner Compressor) - Volkswagen Amarok 2011 Workshop Manual

Amarok 2011 ➤ , Beetle 2012 ➤ , Bora 1999 ➤ , CC 2010 ➤ , CC 2012 ➤ , ...
Air conditioning system with refrigerant R134a - Edition 10.2014
Possible deviation from specifi‐
cation
• High-pressure and low-pres‐
sure are normal,
• The air conditioner compres‐
sor is noisy (especially imme‐
diately after being switched
on),
• The cooling power required is
delivered.
Note
♦ Overfilling with refrigerant oil can occur if the refrigerant oil
level was not checked after the air conditioner compressor
was renewed.
If the air conditioner compressor is not to be replaced, drain
♦
refrigerant oil from air conditioner compressor via the drain
plug. From the total amount of refrigerant oil, fill 50 g direct into
air conditioner compressor and fill remainder in refrigerant cir‐
cuit according to ⇒ vehicle-specific workshop manual .
10.6 Checking systems with an expansion
valve, receiver and air conditioner com‐
pressor regulating valve - N280- (with
externally regulated air conditioner com‐
pressor)
Note
Connecting air conditioner service station
♦
Observe the test prerequisites
♦
– Raise engine speed to 2,000 rpm.
– Observe air conditioner service station pressure gauge.
Note
Switching pressures for the air conditioner compressor regu‐
♦
lating valve - N280- and the radiator fan - V7- are vehicle-
specific.
Pressures should be measured at the service connections; the
♦
location of these connections is vehicle-specific ⇒ Rep. gr.
87 .
10.6.1 Specifications:
High-pressure side:
Rising from starting pressure (when pressure gauge is connec‐
ted) to 20 bar.
148
Rep. gr.00 - Technical data
Possible cause of fault
⇒ page 126
⇒ page 127 .
.
Rectifying fault