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General| Brand | Audi |
|---|---|
| Model | A4 1995 |
| Category | Air Conditioner |
| Language | English |
Overview of the repair manual's scope.
Specific service procedures for R134a refrigerant.
General information related to the A/C system.
Detailed information about the Air Conditioning system.
Details about Refrigerant R134a.
Characteristics and properties of Refrigerant R134a.
Physical properties and data of Refrigerant R134a.
Vapor pressure table for R134a refrigerant.
Safe handling procedures for refrigerants.
Information about refrigerant oils used in A/C systems.
Properties and characteristics of refrigerant oils.
General safety measures for working with A/C systems.
Safety measures for extraction/charging systems.
Safe handling procedures for pressure vessels.
Information on service and recycling equipment.
Specifics for compressors without an A/C clutch.
Procedures for repairing A/C systems.
Legal requirements and regulations for refrigerant handling.
Specific laws and regulations applicable in Germany.
Technical regulations concerning compressed gases.
Guidelines for charging systems that do not require a permit.
Classification of extraction systems used in workshops.
Fundamental principles of Air Conditioning systems.
Basic physical principles relevant to A/C systems.
Relationship between pressure and boiling point in fluids.
How A/C systems contribute to passenger comfort.
How the Air Conditioning system operates.
Components and layout of the refrigerant circuit.
Important precautions for working with the refrigerant circuit.
Procedures for replacing components in the refrigerant circuit.
Details on quick-release couplings in the refrigerant circuit.
Specifications and usage of O-ring seals.
Specifics of quick-release connections on refrigerant lines.
Connections with valves for switches in the refrigerant circuit.
Information on refrigerant circuit pipes and hoses.
Normal operating pressures and temperatures in the refrigerant circuit.
Steps for converting R12 A/C systems to R134a.
Procedures for cleaning the refrigerant circuit.
Detailed instructions for flushing the refrigerant circuit.
Flushing the refrigerant circuit using compressed air and nitrogen.
Flushing the refrigerant circuit using R134a refrigerant.
General guidelines for repairing the refrigerant circuit.
Information on switches and sensors in the refrigerant circuit.
Detailed description of the refrigerant circuit.
Details on the A/C compressor, its types and operation.
Adapters required for assembling flushing circuits.
Function and characteristics of the condenser.
Details on connections using Schrader valves.
Connections with primary sealing (ball) valves.
Function of the evaporator in the A/C system.
Role and operation of the expansion valve.
Function of the fluid reservoir in the A/C system.
Diagrams illustrating refrigerant circuit flushing procedures.
Specifications and usage of O-ring seals.
Function and operation of the pressure relief valve.
Components on the high and low pressure sides of the refrigerant circuit.
Pressures and temperatures in circuits with expansion valves.
Pressures and temperatures in circuits with restrictors and reservoirs.
Details on refrigerant pipes with inner heat exchangers.
Function and replacement of reservoirs.
Function and replacement of restrictors.
Identification and function of switches and sensors.
Operation and function of the A/C compressor regulator valve.
Function of the A/C compressor speed sensor.
Functions of the A/C pressure switch.
Function of the A/C pressure/temperature sensor.
Function of the high pressure switch.
Function of the high pressure switch.
Function of the low pressure switch.
Function of the high pressure sensor.
Function of the refrigerant temperature sensor.
Electrical components not directly part of the refrigerant circuit.
Operation of the radiator fan control module.
Information on using the A/C service station.
Procedures for operating the A/C system after charging.
Guidelines for operating and using the A/C service station.
Procedures and guidelines for charging refrigerant.
Refrigerant R134a capacities for various Audi models.
R134a capacities for Audi A1 (8X_) from MY 11.
R134a capacities for Audi A2 (8Z_) from MY 01.
R134a capacities for Audi A3 (8L_) and TT (8N_).
R134a capacities for Audi A3 (8P_) from MY 04.
R134a capacities for Audi TT (8J_) from MY 07.
R134a capacities for Audi 80, Coupe, and Cabriolet from MY 2002.
R134a capacities for Audi A4 (8D_) from MY 95.
R134a capacities for Audi A4 (8E_) and A4 Cabriolet (8H_).
R134a capacities for Audi A4, A5 Coupe, Q5, A5 Cabriolet from MY 2008/2009.
R134a capacities for Audi 100 and A6 (4A_) from MY 98.
R134a capacities for Audi A6 (4B_) and allroad from MY 1998/2005.
R134a capacities for Audi A6 (4F_) from MY 05.
R134a capacities for Audi A6 (4G_) and A7 (4G_) from MY 11.
R134a capacities for Audi V8 (4C_) from MY 94.
R134a capacities for Audi A8 (4D_) from MY 94.
R134a capacities for Audi A8 (4E_) from MY 03.
R134a capacities for Audi A8 (4H_) from MY 10.
R134a capacities for Audi Q7 (4L_) from MY 06.
R134a capacities for Audi R8 (42_) from MY 08.
Information on types and properties of refrigerant oils.
Specific capacities of refrigerant oil for various models.
Refrigerant oil capacities for Audi A1 (8X_) from MY 11.
Refrigerant oil capacities for Audi A2 (8Z_) from MY 01.
Refrigerant oil capacities for Audi A3 (8L_) and TT (8N_).
Refrigerant oil capacities for Audi A3 (8P_) from MY 04.
Refrigerant oil capacities for Audi TT (8J_) from MY 07.
Refrigerant oil capacities for Audi 80, Coupe, and Cabriolet from MY 2002.
Refrigerant oil capacities for Audi A4 (8D_) from MY 95.
Refrigerant oil capacities for Audi A4 (8E_) and A4 Cabriolet (8H_).
Refrigerant oil capacities for Audi A4, A5 Coupe, Q5, A5 Cabriolet from MY 2008/2009.
Refrigerant oil capacities for Audi 100 and A6 (4A_) from MY 98.
Refrigerant oil capacities for Audi A6 (4B_) and allroad from MY 1998/2005.
Refrigerant oil capacities for Audi A6 (4F_) from MY 05.
Refrigerant oil capacities for Audi A6 (4G_) and A7 (4G_) from MY 11.
Refrigerant oil capacities for Audi V8 (4C_) from MY 94.
Refrigerant oil capacities for Audi A8 (4D_) from MY 94.
Refrigerant oil capacities for Audi A8 (4E_) from MY 03.
Refrigerant oil capacities for Audi A8 (4H_) from MY 10.
Refrigerant oil capacities for Audi Q7 (4L_) from MY 06.
Refrigerant oil capacities for Audi R8 (42_) from MY 08.
How to use pressure gauges for testing and measurements.
Methods for detecting leaks in the refrigerant circuit.
Steps to determine refrigerant circuit leaks.
Using an electronic leak detector to trace leaks.
Using the VAS 6201 system for leak detection.
Adding leak detection additive to an empty refrigerant circuit.
Adding leak detection additive at an open connection.
Adding leak detection additive to a filled refrigerant circuit.
Using a UV lamp to detect leaks in the refrigerant circuit.
Common issues and concerns related to the refrigerant circuit.
How to check refrigerant circuit pressures.
Checking pressures using an A/C service station.
Conditions and checks required before testing pressures.
General procedure for checking pressures.
Checking pressures on specific vehicle configurations.
Specified pressure values for specific vehicle configurations.
Checking pressures for vehicles with expansion valves and fluid reservoirs.
Specified pressure values for vehicles with expansion valves and fluid reservoirs.
Checking pressures for vehicles with externally regulated A/C compressors.
Specified pressure values for externally regulated A/C compressors.
Checking pressures for vehicles with externally regulated compressors and accumulators.
Specified pressure values for externally regulated compressors with accumulators.
Replacing damaged components when the circuit is empty.
Replacing damaged components when the circuit contains refrigerant.
Replacing the compressor without flushing the circuit.
Replacing the compressor due to leakage or internal damage.
Replacing receiver/accumulator/restrictor after cleaning.
Replacing receiver/accumulator without flushing.
Replacing dryer cartridge/bag without flushing.
List of available tools and materials.
Information on the VAS 6201 leak detection system.
Tool for removing A/C clutch from Zexel compressors.
Adapter set for refrigerant circuit flushing.
Details on valve adapters for refrigerant connections.
Adapter set for service connections.
Socket insert for service connections and valve units.
Tool for cleaning condenser fins.
Information on fill hoses for refrigerant cylinders.
Connection pieces for refrigerant cylinders.
Valve caps with spare seals for charging hoses.
Pressure gauge set with pressure reducer for nitrogen.
Adapters for quick-release couplings on service connections.
Methods for improvising tools.
Charging hose for workshop compressed-air systems.
