audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

Expansion Valve, Receiver And A/C Compressor Regulator Valve N280 (with Externally Regulated Compressor)|Page 11499 > < Expansion Valve, Receiver And A/C Compressor Regulator Valve N280 (with Externally Regulated Compressor)|Page 11497
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Expansion Valve: Testing and Inspection
Expansion Valve And Receiver (with Internally Regulated Compressor)

Pressures, Checking For Vehicles With Expansion Valve And Receiver (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 and design of refrigerant circuit switches are vehicle-specific.

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Pressures must be measured at service connections; component locations of these connections are vehicle-specific 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 in bar
B. Low pressure in bar
C. Permissible tolerance range

Expansion Valve, Receiver And A/C Compressor Regulator Valve N280 (with Externally Regulated Compressor)|Page 11499 > < Expansion Valve, Receiver And A/C Compressor Regulator Valve N280 (with Externally Regulated Compressor)|Page 11497