Mazda Training manual — part 284

AIR CONDITIONING
SG01 - Basic System

SG01-15

TC070-15-01H

6. In this example match the gauge reading with the possible condition.

Compressor Failure

Insufficient refrigerant

Excessive refrigerant

Normal

A

B

C

D

AIR CONDITIONING
01 - Identifying A/C Components

Activity01-1

TC070-15-01H

Technician Name

IDENTIFYTING A/C COMPONENTS

Purpose: In this activity, you will identify major A/C components.

What you will need to complete this activity:

Current model vehicle

Workshop Manual or Body Electrical Trouble Shooting Manual

Component Identification
Identify the numbered A/C components on the vehicle and record in the spaces
below. If you need help, refer to the Workshop Manual.

1. 6.

2. 7.

3. 8.

4. 9.

5. 10.

Visual Inspection

1. Do the condenser and radiator have any obstructions to airflow? Yes No

NOTE

Perform the following checks with engine off and key out of ignition.

2. Do the electric cooling fans turn easily with engine and power off? Yes No
3. Does the coolant reservoir tank have proper fluid level? Yes No
4. What is the general appearance of the refrigeration system components?

NOTE

A leak can look like an oily residue. The oily residue will often show up at hose
connections and seal locations.

5. Is the compressor drive belt in good condition and adjusted to specification?

Yes No

AIR CONDITIONING
01 - Identifying A/C Components

Activity01-2

TC070-15-01H

NOTE

If the answer of any of the questions was no, fix the problem before continuing the
inspection. Visual and component inspection help isolate the concern to a specific
system.

Instructor Sign-Off:
Now that you have completed this activity, you should be able to:

Identify A/C components

This skill will help you service an A/C system.

Instructor’s initials:

AIR CONDITIONING
02 - Locating A/C Protection Devices

Activity02-1

TC070-15-01H

Technician Name

LOCATING A/C PROTECTION DEVICES

Purpose: In this activity, you will locate A/C protection devices and explain how they
operate.

What you will need to complete this activity:

Current model vehicle

Workshop Manual or Body Electrical Trouble Shooting Manual

Protection Devices react to abnormally high or low pressure and excessively high
temperature which would damage the system.

Refrigerant Pressure Switch
1. Where is the pressure switch located?


2. How does it protect a system that has a leak in the condenser?


3. How does it protect a system that has inoperative condenser fans?


4. Is the refrigerant that contacts the switch a liquid or vapor?



Thermal Protector (Thermal Switch)

1. Where is this device located?


2. This component senses the temperature of liquid or vapor refrigerant?


3. In what way does the thermal protector safeguard the system?


4. If this component fails due to an open circuit, what will the customer notice?

NOTE

In some models, the Thermal Protector is called “Thermal Protector “ and “Thermo-
switch.” When ordering parts, use the term “Thermal Protector Kit.”