Audi A8 1994 - 2 Description and Operation; Refrigerant Circuit; Refrigerant Circuit Precautions

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2 Description and Operation
⇒ “2.1 Refrigerant Circuit“, page 41
⇒ “2.2 Switches and Sensors on Refrigerant Circuit and Connec‐
tions “, page 74
⇒ “2.3 Electrical Components Not on Refrigerant Circuit“,
page 78
⇒ “2.4 A/C Service Station“, page 79
2.1 Refrigerant Circuit
⇒ “2.1.1 A/C Compressor“, page 41
⇒ “2.1.2 Adapter for Assembling Flushing Circuit“, page 42
⇒ “2.1.3 Condenser“, page 58
⇒ “2.1.4 Connections with Schrader Valve“, page 58
⇒ “2.1.5 Connections with Primary Sealing Valve (Ball Valve)“,
page 59
⇒ “2.1.6 Evaporator“, page 60
⇒ “2.1.7 Expansion Valve“, page 61
⇒ “2.1.8 Fluid Reservoir“, page 62
⇒ “2.1.9 Flushing Circuit Block Diagrams“, page 63
⇒ “2.1.10 O-Ring Seals“, page 68
⇒ “2.1.11 Pressure Relief Valve“, page 68
⇒ “2.1.12 Refrigerant Circuit Components, High and Low Pres‐
sure Sides“, page 68
⇒ “2.1.13 Refrigerant Circuit with Expansion Valve, Pressures
and Temperatures“, page 69
⇒ “2.1.14 Refrigerant Circuit with Restrictor and Reservoir, Pres‐
sures and Temperatures“, page 71
⇒ “2.1.15 Refrigerant Pipe With Inner Heat Exchanger“,
page 73
⇒ “2.1.16 Reservoir“, page 73
⇒ “2.1.17 Restrictor“, page 74
2.1.1 A/C Compressor
The A/C compressor is driven by a ribbed belt or a input shaft,
which is driven by the vehicle engine.
A/C Compressor with Magnetic Clutch
♦ An electromagnetic clutch -A- attached to A/C compressor
provides the power link between the ribbed belt pulley -B- and
A/C compressor crankshaft with A/C system switched on.
♦ An overload safeguard attached to the clutch plate or in the A/
C compressor solenoid coil is tripped if the compressor does
not move freely, thus protecting the belt drive against over‐
load.
A/C Compressor without Magnetic Clutch
♦ An overload safeguard attached to the pulley of the compres‐
sor -B- is tripped if the compressor does not move freely, thus
protecting the belt drive against overload.
Audi 100 1991 ➤ , Audi 80 1992 ➤ , Audi A1 2011 ➤ , Audi A2 2001 ➤ , A ...
Refrigerant R134a Servicing - Edition 01.2011
2. Description and Operation 41