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Low-pressure side:
Falling from starting pressure (when pressure gauge is connec‐
ted) to diagram value.
A - Low pressure (measured at the service connection) in bar ab‐
solute pressure.
B - Control current for the air conditioner compressor regulating
valve - N280- .
C - Permitted tolerance range.
Note
♦
Under unfavourable conditions (very high ambient tempera‐
tures, high atmospheric humidity), the pressure on the high-
pressure side can increase to a maximum of 29 bar.
♦
The control current -B- is indicated in the measured values
block.
♦
The high pressure is indicated in the measured values block
⇒ Rep. gr. 87 .
♦
The low pressure is adjusted to within tolerances within the
output range for the air conditioner compressor depending on
the control current for the air conditioner compressor regulat‐
ing valve - N280- .
♦
Under unfavourable conditions (very high ambient tempera‐
tures, high atmospheric humidity), the output may be insuffi‐
cient to achieve the specification in every case.
♦
The set working current for the regulating valve must be great‐
er than 0.3 A to ensure that the regulating valve is reliably
activated.
♦
At the setting for “maximum cooling power”, the control current
should be approx. 0.8 A (indicated in the measured values
block) ⇒ Rep. gr. 87 .
♦
Absolute pressure means that 0 bar corresponds to an abso‐
lute vacuum. The normal ambient pressure corresponds to 1
bar absolute pressure. On most pressure gauges, a reading
of 0 bar corresponds to an absolute pressure of one bar (which
is confirmed by the existence of - 1 bar marking beneath the
0 scale marking).
Amarok 2011 ➤ , Beetle 2012 ➤ , Bora 1999 ➤ , CC 2010 ➤ , CC 2012 ➤ , ...
Air conditioning system with refrigerant R134a - Edition 10.2014
144 Rep. gr.00 - Technical data
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