Get General information on air conditioning systems -> Introduction Guide for Audi A2 SUV 1999-2005

Audi 100 1991 ➤ , Audi 80 1992 ➤ , Audi A1 2011 ➤ , Audi A1 Sportback 2 ...

Air conditioner with refrigerant R134a - Edition 11.2018

General information on air condition‐

ing systems

⇒ “2.1 General notes”, page 4

⇒ “2.2 Introduction”, page 4

⇒ “2.3 Safety precautions for vehicles with start/stop system”,

page 6

⇒ “2.4 Other reference material ”, page 6

⇒ “2.5 Principles of air conditioning systems”, page 7

⇒ “2.6 Refrigerant R134a”, page 9

⇒ “2.7 Properties of refrigerant R134a”, page 11

⇒ “2.8 Refrigerant oil”, page 13

⇒ “2.9 How air conditioning works”, page 14

⇒ “2.10 General work safety”, page 15

⇒ “2.11 Product properties”, page 16

⇒ “2.12 Handling refrigerant”, page 16

⇒ “2.13 Handling pressure vessels”, page 17

⇒ “2.14 Safety regulations for working with extraction and charg‐

ing systems”, page 18

⇒ “2.15 Safety measures for working on vehicles with air condi‐

tioning system and for handling refrigerant R134a”, page 18

⇒ “2.16 Basic rules for working on refrigerant circuit”, page 22

⇒ “2.17 Before using air conditioner after system has been re-

charged”, page 27

2.1

General notes

⇒ “2.2 Introduction”, page 4

⇒ “2.4 Other reference material ”, page 6

⇒ “2.5 Principles of air conditioning systems”, page 7

⇒ “2.6 Refrigerant R134a”, page 9

⇒ “2.7 Properties of refrigerant R134a”, page 11

⇒ “2.8 Refrigerant oil”, page 13

⇒ “2.9 How air conditioning works”, page 14

⇒ “2.10 General work safety”, page 15

⇒ “2.11 Product properties”, page 16

⇒ “2.12 Handling refrigerant”, page 16

⇒ “2.13 Handling pressure vessels”, page 17

⇒ “2.14 Safety regulations for working with extraction and charg‐

ing systems”, page 18

⇒ “2.15 Safety measures for working on vehicles with air condi‐

tioning system and for handling refrigerant R134a”, page 18

⇒ “2.16 Basic rules for working on refrigerant circuit”, page 22

⇒ “2.17 Before using air conditioner after system has been re-

charged”, page 27

2.2

Introduction

Rep. gr.87 - Air conditioning system

Audi 100 1991 ➤ , Audi 80 1992 ➤ , Audi A1 2011 ➤ , Audi A1 Sportback 2 ...

Air conditioner with refrigerant R134a - Edition 11.2018

This manual is intended to provide foremen and mechanics with

the basic knowledge needed to ensure reliable and successful

repairs.

Note

This requires careful study of the manual, coupled with suitable

training on automotive air conditioning systems (with a qualifica‐

tion test if applicable) and the ability to apply the acquired exper‐

tise in practice.

This document is a compact reference work which should be kept

at the workplace. It should also be available for presentation to

the responsible supervisory agency on request.

Vehicles with high-voltage system (hybrid vehicles)

High voltage! Danger to life!

The voltage levels in the high-voltage system constitute a safety

hazard. Danger of severe or fatal injuries from electric shock if

high-voltage components or high-voltage wiring are damaged.

– Carry out visual check of high-voltage components and high-

voltage wiring.

– Never use cutting/forming tools or other sharp-edged imple‐

ments.

– Never perform work using welding, brazing, thermal bonding

or hot air.

Risk of injury - engine may start unexpectedly

It is difficult to determine whether the drive system of an electric

vehicle or hybrid vehicle is active. Moving parts can trap or draw

in parts of the body.

– Switch off ignition.

– Place ignition key outside vehicle.

Risk of damage to high-voltage wiring

Incorrect handling may result in damage to the insulation of high-

voltage wires or high-voltage connectors.

– Never use high-voltage wiring or high-voltage connectors as

a support.

– Never prop tools against high-voltage wiring or high-voltage

connectors.

– Never bend or kink high-voltage wiring.

– Pay attention to coding when connecting high-voltage con‐

nections.

Observe the additional warnings for working on vehicles with

high-voltage electrical system.

⇒ “1 Warning instructions when working on vehicles with high-

voltage system”, page 1

2. General information on air conditioning systems

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General information on air conditioning systems -> Introduction for Your Audi A2 SUV 1999-2005

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