Mazda Training manual — part 283

AIR CONDITIONING
SG01 - Basic System

SG01-11

TC070-15-01H

Handling Compressor Oil
• Use only ATMOS GU10 compressor oil for this vehicle. Using a PAG oil other than

ATMOS GU10 compressor oil can damage the A/C compressor.

• Do not spill ATMOS GU10 compressor oil on the vehicle. A drop of compressor oil

on the vehicle surface can eat away at the paint. If oil gets on the vehicle, wipe it off
immediately.

• ATMOS GU10 compressor oil (PAG oil) has higher moisture absorption efficiency

than the previously used mineral oil. If moisture mixes with the compressor oil, the
refrigerant system could be damaged. Therefore, install caps immediately after
using the compressor oil or removing refrigerant system parts to prevent moisture
absorption.

Moisture Absorption

0

• If the refrigerant gas is completely discharged from the system for reasons such as

a malfunction during A/C operation, repair or replace the malfunctioning part, charge
the refrigerant to the specified amount and always add 60 ml {60 cc, 2.03 fl oz} of
compressor. If the compressor oil is not adequately replenished, the A/C
compressor may quickly deteriorate, abnormal noise may develop, cooling
performance may be affected or, in the worst case, the A/C compressor may seize.

AIR CONDITIONING
SG01 - Basic System

SG01-12

TC070-15-01H

HVAC ABBREVIATION

A/C: Air Conditioning
B+: Battery Positive Voltage
CAN: Control Area Network
CPU: Central Processing Unit
HI: High
IG: Ignition
ISO: International Organization for Standardization
LO: Low
M: Motor
MAX: Maximum
OFF: Switch Off
ON: Switch On
PCM: Powertrain Control Module
REC: Recirculate
SW: Switch


Item Specification (Mazda 3)

Heating capacity (kW {kcal/h}): 4.550 {3,913}
Cooling capacity (kW {kcal/h}): 3.960 {3,406}
Refrigerant

Type: R-134a
Regular amount: (approx. quantity) (g {oz}) 525 {18.5}

A/C compressor

Type: Vane-rotary
Discharge capacity (ml {cc, fl oz}): 120 {120, 4.06}
Max. allowable speed (rpm): 6,400/Z6, 7,200/LF

Lube oil

Type: ATMOS GU10
Sealed volume (approx. quantity) (ml {cc, fl oz}): 120 {120, 4.06}/Z6,

150 {150, 5.07}: LF

Condenser

Type: Multi-flow (sub-cooling type)
Radiated heat (kW {kcal/h}): 6.600 {5,680}

Receiver/drier capacity (ml {cc, fl oz}): 180 {180, 6.08}
Desiccant: Synthetic zeolite
Expansion valve type: Block type
Evaporator type: Double-tank drawn cup
Temperature control: Reheat full air mix type

AIR CONDITIONING
SG01 - Basic System

SG01-13

TC070-15-01H

Review Exercise

1. Name the components.

AIR CONDITIONING
SG01 - Basic System

SG01-14

TC070-15-01H

2. Explain the function of the “Airflow Mode Door”.









3. Explain the function of the “Air Mix Door”.









4. Explain the function of the “Air Filter”.









5. Explain the purpose of the “Thermal Protector” and where it is located.