Evacuating Refrigerant Circuit Using Air Conditioner Service Station - Volkswagen Amarok 2011 Workshop Manual

Amarok 2011 ➤ , Beetle 2012 ➤ , Bora 1999 ➤ , CC 2010 ➤ , CC 2012 ➤ , ...
Air conditioning system with refrigerant R134a - Edition 10.2014
– Connect air conditioner service station to service connections
as described in the user's manual for the vehicle ⇒ Rep. gr.
87 and bring into operation.
Note
The possibility cannot be excluded that, along with the refrig‐
♦
erant, refrigerant oil is extracted from the refrigerant circuit. In
order to ensure the lubrication of the air conditioner compres‐
sor, the refrigerant oil quantity should be topped up with fresh
oil ⇒ Rep. gr. 87 .
On vehicles with air conditioner compressor and no magnetic
♦
coupling (with air conditioner compressor regulating valve -
N280- ) the engine should only run for < 10 minutes with empty
refrigerant circuit and closed refrigerant circuit (the air condi‐
tioner compressor runs with it continually). The engine speed
must not exceed 2000 rpm.
On vehicles with air conditioner compressor and magnetic
♦
coupling, the engine may be started as the air conditioning
system pressure switch - F129- or high-pressure sender -
G65- (checks whether refrigerant is in the circuit) switches off
the magnetic coupling as soon as there is no refrigerant in the
refrigerant circuit.
5.4 Evacuating refrigerant circuit using air
conditioner service station
• Always follow the procedure described in the user's manual
for your air conditioner service station.
• The procedure described here is that for air conditioner service
station - VAS 6007A- .
Before the refrigerant circuit is charged with refrigerant, it should
be evacuated (air empty) for 45 minutes for single evaporator
system and 60 minutes for 2 evaporator systems. In addition, all
moisture should be extracted from the circuit.
Leakage can be determined when evacuating the refrigerant cir‐
cuit.
Evacuating:
Caution
♦ The engine must not be started during the evacuation pro‐
cedure and as long as there is a vacuum present in the
refrigerant circuit.
♦ The air conditioner compressor may be damaged if the
engine is started when a vacuum is present in the refrig‐
erant circuit.
♦ Only start engine when refrigerant circuits are charged.
– Switch off ignition.
– If necessary, check the refrigerant oil quantity in the refrigerant
circuit; see vehicle-specific repair manual ⇒ Rep. gr. 87 .
– Connect air conditioner service station to power supply.
– Check the refrigerant quantity in the air conditioner service
station.
50
Rep. gr.00 - Technical data