Mazda TTCC007700--1155--0011H Bedienungsanleitung

Air Conditioning

Operation & Diagnosis

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-0

Student Guide

Mazda Motor Corporation

Technical Service Training

AIR CONDITIONING

SG00 - General

SG00-1

TC0

01H

OUTLINE

Air conditioning operation & diagnosis course is 2-day training and centered on

Manual air conditioning system. Through this course, you can learn most frequent

services for air conditioning, such as Performance check, Refrigerant charge, and

Symptom troubleshooting.

The course begins with reviewing A/C Fundamentals (Mazda Masters Level F); you

are required to bring your textbook “A/C Fundamentals” to this training session.

Student guide and Student activity sheet are to be provided before the session starts.

In the Student guide and the Student activity sheet, you will find some questions and

tables that some information is intentionally removed. Try to answer to the question in

reference to what you have learnt so far and get information from relevant service

materials, such workshop manual and wiring diagram.

NOTE This course is developed based on the service materials of Mazda 3 included

in the CD-ESI (Electronic Service Information) 2/2004 Ver. 3.0 CD08-XX-04BE.

OBJECTIVES

After completing this course, you will be able to:

 Describe a refrigeration cycle and what part the components play in the

cooling process.

 Identify major components of a manual A/C system

 Identify the components of Manual Air Conditioner and distinguish the

components from those of Full-auto Air Conditioner.

 Describe a control system and how the system controls the Manual Air

Conditioner.

 Identify major components of a manual A/C system

 Locate A/C system protection devices

 Explain the function of protection devices

 Conduct A/C performance checks

 Perform A/C refrigerant charging

 Perform checks for A/C components

 Isolate trouble cause based on Symptom based approach

AIR CONDITIONING

SG00 - General

SG00-2

TC0

01H

CONTENTS

SG00 – General

SG01 – Basic System

Activity01 - Identifying A/C Components

Activity02 - Locating A/C Protection Devices

Activity03 - A/C performance Check

Activity04 - Refrigerant Charging

SG02 – Control System [Manual Air-conditioning]

Activity05 - Units and parts checks*

Activity06 - Symptom troubleshooting

AIR CONDITIONING

SG00 - General

SG00-3

TC0

01H

TIMETABLE

Day 1

Time Session Remark

8:30 – 9:00 Introductions

9:00 – 10:20 Review A/C Fundamentals A/C Fundamentals textbook

10:20 – 10:30 Break

10:30 – 11:50 Basic System SG (Classroom)

12:00 – 13:00 Lunch

13:00 – 14:50

Identifying AC Components

Locating AC Protection Devices

Refrigerant Pressure Check

SG Activity (Workshop)

14:50 – 15:00 Break

15:00 – 17:00 Performance Check SG Activity (Workshop)

Day 2

Time Session Remark

8:30 – 9:50 Control System SG (Classroom)

9:50 – 10:00 Break

10:00 – 11:50 Units and parts checks SG Activity (Workshop)

12:00 – 13:00 Lunch

13:00 – 14:50 Symptom troubleshooting SG Activity (Workshop)

14:50 – 15:00 Break

15:00 – 16:40 Course completion test

16:40 – 17:00 Session evaluation

Conclusion

Attendees satisfaction survey

This schedule is subject to change when necessary.

AIR CONDITIONING

SG00b - Pre-Test

SG00b-1

TC0

01H

1. Technician A says the refrigerant used in the A/C system absorbs and releases

large amounts of heat as it changes from a liquid to a gas.

Technician B says as the refrigerant circulates through the tubes and hoses of an

operating A/C system, it constantly changes from a liquid to a gas and back to a

liquid again.

Who is correct?

a. Technician A

b. Technician B

c. Both Technicians

d. Neither technician

2. Technician A says that at point E in

this illustration the refrigerant is high

pressure vapor.

Technician B says at point E in this

illustration the refrigerant is a low

pressure vapor.

Who is correct?

a. Technician A

b. Technician B

c. Both Technicians

d. Neither technician

3. One BTU is the amount of heat needed at sea level to raise the temperature of

one pound of water;

a. One degree Centigrade

b. Ten degrees Centigrade

c. Ten degrees Fahrenheit

d. One degree Fahrenheit

4. Technician A says the latent heat applied to change a substance from a liquid to a

vapor is called the latent heat of vaporization.

Technician B says the latent heat applied to change a substance from a liquid to a

vapor is called the latent heat of condensation.

a. Technician A

b. Technician B

c. Both Technicians

d. Neither technician

AIR CONDITIONING

SG00b - Pre-Test

SG00b-2

TC0

01H

5. Technician A says in a Mazda A/C system the refrigerant changes state from a

liquid to a vapor in the compressor while losing heat.

Technician B says the compressor acts as a pump for the refrigerant in an A/C

system.

Who is correct?

a. Technician A

b. Technician B

c. Both Technicians

d. Neither technician

6. Technician A says the compressor increases the temperature of the vaporized

refrigerant without adding heat.

Technician B says the compressor raises the pressure of the vaporized refrigerant

and not the temperature.

Who is correct?

a. Technician A

b. Technician B

c. Both Technicians

d. Neither technician

7. Which component in this

illustration receives hot, high

pressure refrigerant gas from the

compressor and transfers the heat to

the outside air.

a. 2

b. 3

c. 4

d. 5

8. Technician A says the expansion valve or orifice tube controls the amount of

refrigerant entering the evaporator.

Technician B says the accumulator regulates the refrigerant flow to the evaporator.

Who is correct?

a. Technician A

b. Technician B

c. Both Technicians

d. Neither technician

AIR CONDITIONING

SG00b - Pre-Test

SG00b-3

TC0

01H

9. Which component in this

illustration removes heat from the

passenger compartment and

transfers it to the refrigerant?

a. 2

b. 3

c. 4

d. 5

10. At point A the refrigerant is;

a. High pressure liquid

b. High pressure vapor

c. Low pressure liquid

d. Low pressure vapor

11. Technician A says R-12 and R-134a system have different-sized service valves,

to prevent accidental mixing of refrigerants.

Technician B says R-134a systems use larger, metric-thread, quick connect service

valves.

Who is correct?

a. Technician A

b. Technician B

c. Both Technicians

d. Neither technician

AIR CONDITIONING

SG00b - Pre-Test

SG00b-4

TC0

01H

12. Technician A says do not expose refrigerant to open flame. R-12 may produce

poisonous phosgene gas, and R-134a may support combustion.

Technician B says a propane torch style leak detector is the best type of detector for

R-12 and R134a systems.

Who is correct?

a. Technician A

b. Technician B

c. Both Technicians

d. Neither technician

13. Technician A says if refrigeration oil is not sealed properly, it will absorb moisture

from the air.

Technician B says you can reuse refrigeration oil removed from an operating A/C

system.

Who is correct?

a. Technician A

b. Technician B

c. Both Technicians

a. Neither technician

14. Technician A says after repairs have been performed, or if a system has been

open for a long period of time, the system must be evacuated to remove moisture

and ensure that it will hold a vacuum.

Technician B says the minimum time any system should be evacuated is 15 minutes.

The longer the system has been open, the longer it should be evacuated.

Who is correct?

a. Technician A

b. Technician B

c. Both Technicians

d. Neither technician

15. Technician A says all refrigerant should be recovered and recycled.

Technician B says only R-12 needs to be recovered and recycled.

Who is correct?

a. Technician A

b. Technician B

c. Both Technicians

d. Neither technician

AIR CONDITIONING

SG00b - Pre-Test

SG00b-5

TC0

01H

16. Technician A says the accumulator traps liquid refrigerant allowing it time to

completely vaporize.

Technician B says if liquid refrigerant reaches the compressor it could be damaged.

Who is correct?

a. Technician A

b. Technician B

c. Both Technicians

d. Neither technician

17. Technician A says small refrigerant leaks are normal and the refrigerant should

be replaced once a year as a maintenance item.

Technician B says if the refrigerant has leaked out of an A/C system the technician

should charge the system with a small amount of refrigerant for leak testing purposes.

Who is correct?

a. Technician A

b. Technician B

c. Both Technicians

d. Neither technician

18. This method of charging an A/C system adds gaseous refrigerant through the

low-side service valve while the compressor is running.

a. Liquid charging

b. Vapor charging

c. Both answers a and b

d. Neither answer a or b

19. The component in this illustration divides the A/C system into high and low

pressure sides, what is it?

a. Fixed orifice tube

b. Expansion valve

c. Accumulator

d. Receiver dryer

AIR CONDITIONING

SG00b - Pre-Test

SG00b-6

TC0

01H

20. Which statement is true about this

climate control plenum assembly?

a. All air passes through the

evaporator

b. The air is being re-circulated

c. The temperature blend door is set

for max heat

d. All the above

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