Mazda Training manual — part 280

AIR CONDITIONING
SG00b - Pre-Test

SG00b-5

TC070-15-01H

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

TC070-15-01H

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

AIR CONDITIONING
SG01 - Basic System

SG01-1

TC070-15-01H

OBJECTIVES

After completing this section, 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

Activities To complete this section, you will perform the following activities:

Activity Title/Description

Location

AC01

Identifying A/C Components

Shop

AC02

Locating A/C Protection Devices

Shop

AC03

A/C performance Check

Shop

AC04 Refrigerant

Charging

Shop

In this section:

Basic System

A/C Components . . . . . . . . . . . . . . . . . . . . . . ... 2
A/C Unit construction/operation . . . . . . . . . . . . . . . . . . 3
Evaporator . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Expansion valve . . . . . . . . . . . . . . . . . . . . . . . 4
Air Mix Door Operation . . . . . . . . . . . . . . . . . . . . .. 5
Airflow Mode Door Operation . . . . . . . . . . . . . . . . . . 5
Air filter function . . . . . . . . . . . . . . . . . . . . . . . . 6
A/C compressor . . . . . . . . . . . . . . . . . . . . . . . . 6
Condenser . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Refrigerant life . . . . . . . . . . . . . . . . . . . . . . . ... 7
Spring-lock Coupling . . . . . . . . . . . . . . . . . . . . . . 8
Gauge manifold reading . . . . . . . . . . . . . . . . . . . . 9
Refrigerant System Service Warnings (Reference) . . . . . . . . . ... 10
Refrigerant System Service Cautions . . . . . . . . . . . . . . . 10
AC abbreviation . . . . . . . . . . . . . . . . . . . . . . . . 12
Item Specification . . . . . . . . . . . . . . . . . . . . . . .. 12
Review Exercise . . . . . . . . . . . . . . . . . . . . . . . 13

NOTE
This SG: Student Guide is developed based on Mazda 3.

AIR CONDITIONING
SG01 - Basic System

SG01-2

TC070-15-01H

A/C Components

Name the components.