Volkswagen Amarok 2011 Workshop Manual page 21

Amarok 2011 ➤ , Beetle 2012 ➤ , Bora 1999 ➤ , CC 2010 ➤ , CC 2012 ➤ , ...
Note
If the engine is being started for the first time after the refrig‐
♦
erant circuit has been reassembled.
If possible, start engine only with refrigerant circuit charged.
♦
The air conditioner compressor is driven permanently by the
♦
poly V-belt pulley or elastic drive coupling (it is not fitted with
a magnetic clutch).
If an air conditioner compressor seizes, the overload protec‐
♦
tion separates from the air conditioner compressor shaft. Even
if no bulges are visible in the V-belt pulley or overload protec‐
tion, it may be that the air conditioner compressor has seized.
Another indication is abraded rubber material around the poly
V-belt pulley or overload protection.
The air conditioner compressor has an internal oil circuit to
♦
ensure that the air conditioner compressor is not damaged
when the refrigerant circuit is empty. This means that about
3
40 to 50 cm refrigerant oil remain in the air conditioner com‐
pressor.
The engine may be started only when the refrigerant circuit is
♦
properly assembled. If, for example, the refrigerant lines are
not connected to the air conditioner compressor and the en‐
gine is running, the compressor may heat up so much through
internal warming that it will be destroyed.
The air conditioner compressor regulating valve - N280- is not
♦
activated when the refrigerant circuit is empty and the air con‐
ditioner compressor idles with the engine.
If it is necessary to start engine with an empty refrigerant cir‐
♦
cuit:
The refrigerant circuit must be fully assembled.
♦
At least ¼ of the quantity of refrigerant oil specified for this
♦
refrigerant circuit must be in the air conditioner compressor.
The engine speed must not exceed 2000 rpm.
♦
The engine should run < 10 minutes.
♦
1.12.1 O-ring
♦ Use only O-rings that are resistant to refrigerant R134a and
related refrigerant oils. O-rings are no longer colour-coded.
Coloured and black O-rings are used.
♦ Check that the O-rings used have the correct internal diame‐
ters.
⇒ Rep. gr. 87
⇒ Parts catalogue
♦ Never reuse O-rings.
♦ Before installing, moisten O-rings lightly with refrigerant oil
(PAG oil).
Air conditioning system with refrigerant R134a - Edition 10.2014
1. General notes on air conditioning systems
15