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.”