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Note
If the low-pressure switch had been removed in order to connect
the air conditioner service station, bridge the electrical connec‐
tions in the respective connector for pressure measurement.
• The air conditioner compressor is driven by the engine via the
air conditioning system magnetic clutch - N25- .
• The air conditioner compressor regulating valve - N280- is ac‐
tivated by the Climatronic control unit - J255- .
⇒ Rep. gr. 87
If the air conditioner compressor is not driven or the regulating
valve not activated when the engine is running:
– Determine the cause, e.g. by reading the event memory for
the air conditioning system, and rectify it.
– Observe the test prerequisites.
– Check power supply for air conditioning system magnetic
clutch - N25- . If this is OK, repair magnetic clutch.
– Check actuation of air conditioner compressor regulating valve
- N280- .
⇒ Rep. gr. 87 .
10.1.3 Continuation of checking pressures
♦ Where vehicles have a restrictor and reservoir, check these
(with internally regulated air conditioning system compressor)
⇒ page 130 .
♦ Where vehicles have an expansion valve and receiver, check
these (with internally regulated air conditioner compressor)
⇒ page 135 .
♦ Where vehicles have an expansion valve and receiver, check
these (without internally regulated air conditioner compressor)
⇒ page 141 .
♦ Where vehicles have a restrictor and reservoir and air condi‐
tioning system compressor regulating valve - N280- (external‐
ly regulated air conditioning system compressor)
⇒ page 143 .
10.2 Checking systems with a restrictor and
collector (with internally regulated air
conditioner compressor)
Note
♦
Connecting air conditioner service station ⇒ page 126 .
♦
Observe the test prerequisites ⇒ page 127 .
– Raise engine speed to 2,000 rpm.
– Observe air conditioner service station pressure gauge.
Amarok 2011 ➤ , Beetle 2012 ➤ , Bora 1999 ➤ , CC 2010 ➤ , CC 2012 ➤ , ...
Air conditioning system with refrigerant R134a - Edition 10.2014
130 Rep. gr.00 - Technical data
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