audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

Restrictor, Reservoir And A/C Compressor Regulator Valve N280 (With Externally Regulated Compressor)|Page 11481 > < Restrictor, Reservoir And A/C Compressor Regulator Valve N280 (With Externally Regulated Compressor)|Page 11479
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Expansion Block/Orifice Tube: Testing and Inspection
Restrictor And Reservoir (With Internally Regulated Compressor)

Pressures, Checking For Vehicles With Restrictor And Reservoir (with Internally Regulated Compressor)

NOTE:

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Connecting service station. See: Testing and Inspection/Component Tests and General Diagnostics/Pressures, Checking on Vehicles

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Observe test conditions. See: Testing and Inspection/Component Tests and General Diagnostics/Pressures, Checking on Vehicles/Refrigerant
Circuit, Checking Pressures (Using Service Station)

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Set engine speed to 2000 rpm.

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Observe pressure gauge of service station.

NOTE:

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Switching pressures for refrigerant circuit switches are vehicle-specific.

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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 reservoir (measurement accuracy). Only applies to certain vehicles Heating, air conditioning or Air
conditioning.

Specifications

High-pressure side:

Increasing from initial pressure (on connecting pressure gauges) to max.20 bar

Low-pressure side:

Decreasing from initial pressure (on connecting pressure gauges) to value in graph

A. High pressure (measured at service connection) in bar
B. Low pressure (measured at connection with valve at compressor or reservoir) in bar
C. Permissible tolerance range
D. Low pressure (measured at connection with valve for low-pressure switch or at service connection) in bar
E. Permissible tolerance range

Restrictor, Reservoir And A/C Compressor Regulator Valve N280 (With Externally Regulated Compressor)|Page 11481 > < Restrictor, Reservoir And A/C Compressor Regulator Valve N280 (With Externally Regulated Compressor)|Page 11479