Audi A2 2001 - Page 163

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4.4.4 Checking Pressures For Vehicles With
Restrictor and Accumulator - Internally
Regulated Compressor
Note
♦ Connecting service station. Refer to
⇒ “2.4 A/C Service Station“, page 79 .
♦ Observe test requirements. Refer to
⇒ “4.4 Pressures, Checking“, page 153 .
– Refrigerant circuit, checking pressure with service station, re‐
fer to
⇒ “4.4.1 Checking Pressure with Service Station“, page 153 .
The pressures with the ignition turned off meet the specifications.
– Start the engine.
– Set engine speed to 2000 RPM.
– Observe pressure gauge of service station.
Note
♦ Switching pressures for refrigerant circuit switches are vehi‐
cle-specific.
♦ Connection with valve for low-pressure switch or at evaporator
is only to be used for vehicles with no service connection on
low-pressure side and inaccessible connection at compressor
or accumulator (measurement accuracy). Applies only to cer‐
tain vehicles, refer to ⇒ Heating, Ventilation and Air Condi‐
tioning; Rep. Gr. 87 ; Diagnosis and Testing (vehicle-specific
repair manual).
♦ Specified values for the refrigerant circuit pressures, refer to
⇒ “4.4.5 Specified Values For Vehicles With Restrictor and
Accumulator - Internally Regulated Compressor“, page 159 .
4.4.5 Specified Values For Vehicles With Re‐
strictor and Accumulator - Internally
Regulated Compressor
High-pressure side
Increasing from initial pressure (when connecting pressure
gauges) to a maximum of 20 bar.
Audi 100 1991 ➤ , Audi 80 1992 ➤ , Audi A1 2011 ➤ , Audi A2 2001 ➤ , A ...
Refrigerant R134a Servicing - Edition 01.2011
4. Diagnosis and Testing 159