Audi TT 1999 User Manual

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Repair Manual
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Refrigerant R134a Servicing
Edition 01.2011
Service
Service Department. Technical Information

Audi TT 1999 Specifications

General

Brand	Audi
Model	TT 1999
Category	Air Conditioner
Language	English

Summary

1 General Information

1.1 A/C System

Details the air conditioning system's overall structure and operation.

1.2 Laws and Regulations

Covers legal and environmental regulations for refrigerant handling and disposal.

1.3 A/C System Principles

Explains the fundamental physical principles of A/C system operation.

1.4 Refrigerant Circuit and Components

Details the refrigerant circuit and its individual components.

2 Description and Operation

2.1 Refrigerant Circuit

Explains the refrigerant flow and function of the circuit.

2.2 Switches and Sensors on Refrigerant Circuit and Connections

Describes switches, sensors, and their connections in the refrigerant circuit.

2.3 Electrical Components Not on Refrigerant Circuit

Lists and explains electrical components external to the refrigerant circuit.

2.4 A/C Service Station

Details the operation and use of the A/C service station.

3 Specifications

3.1 Charging Refrigerant

Guidelines for safely charging refrigerant into the A/C system.

3.2 Refrigerant R134a Capacities

Lists refrigerant R134a quantities for various Audi models.

3.3 Refrigerant Oils

Information on types, properties, and handling of refrigerant oils.

3.4 Refrigerant Oil Capacities

Specific refrigerant oil quantities for different Audi models.

4 Diagnosis and Testing

4.1 Pressure Gauge, Tests and Measurements

Explains the use of pressure gauges for system diagnosis.

4.2 Leak Detection

Covers methods and tools for detecting leaks in the A/C system.

4.3 Refrigerant Circuit Concerns

Discusses common problems and troubleshooting for the refrigerant circuit.

4.4 Pressures, Checking

Procedures and specifications for checking system pressures.

5 Removal and Installation

5.1 Leaking or Damaged Components Except A/C Compressor, Accumulator or Receiver - Circuit Empty of Refrigerant

Procedures for component removal when the circuit is empty.

5.2 Leaking or Damaged Components Except A/C Compressor, Accumulator or Receiver - Circuit Contains Refrigerant

Procedures for component removal when refrigerant is present.

5.3 Compressor, Replacing Without Flushing Refrigerant Circuit

Steps for replacing the compressor without flushing.

5.4 Compressor, Replacing Due to Leakage Or Internal Damage

Procedures for replacing the compressor due to damage or leakage.

5.5 Receiver or Accumulator and Restrictor, Replacing After Cleaning Refrigerant Circuit

Replacing receiver/accumulator/restrictor after circuit cleaning.

5.6 Receiver or Accumulator, Replacing Without Flushing Refrigerant Circuit

Replacing receiver/accumulator without flushing.

5.7 Dryer Cartridge and Dryer Bag, Replacing Without Flushing Refrigerant Circuit

Replacing dryer cartridge/bag without flushing.

6 Special Tools

6.1 Commercially Available Tools and Materials

Lists and describes commercially available tools for A/C service.

6.2 Improvised Tools

Discusses improvised tools for A/C system service and usage.