2012 SSANGYONG NEW ACTYON SPORTS Service Manual

01-20
2) Configuration
Air source
door caseA/C filter
Blower unit
(upper) case
Blower motor
assembly
Power
Transistor
A/C cable
assembly
Thermo AMP
Heater unit (right)
case
Air mix door
actuator
Lower duct
Mode door
link assembly Mode door
actuator Heater unit (left) case Mode doorHeater core Duct temperature
sensorEvaporatorBlower unit
(lower) case Air source door
actuator

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Mode door actuatorDuct temperature sensor
Air source door actuator
Power transistor
Blower motor
Thermo AMP Air mix door
actuator
A/C controller unit Interior
temperature
sensor Main wiring
connector
3) Wiring Layout

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5. A/C INPUT/OUTPUT DIAGRAM
Below diagram shows the input/output mapping between the components of FATC A/C and A/C
controller briefly.
▶ A/C compressor control by engine ECU
In case of current vehicle models, the system turns ON or OFF the compressor switch according
to the refrigerant pressure, ambient temperature and condenser temperature to protect the
A/C
circuits. However, for the vehicles equipped with DI engine, the engine ECU turns off the
A/C
compressor under below conditions, including those above.
Coolant temperature: 20℃ or less
Coolant temperature: 115℃ or more
For approx. 4 sec. after starting the engine
Engine speed: 650 rpm or less
Engine speed: 4,500 rpm or more
During abrupt acceleration for the vehicle equipped with manual transmission 1.
2.
3.
4.
5.
6.

01-24
6. A/C COOLING CYCLE
1) System Flow
"Compression -> Condensation -> Expansion -> Evaporation" -
2) Functions
(1) Compressor
Condition: Gas
Function: Circulates the refrigerant and increases the pressure and temperature for easier
evaporation. -
-
(2) Condenser
Condition: Gas/Liquid
Function: Cools and condenses the refrigerant by using ambient air to liquefy it under high
pressure. -
-
(3) Receiver drier
Condition: Gas/Liquid
Function: Keeps the refrigerant free from moisture by separating/collecting the moisture from it. -
-
(4) Expansion valve
Condition: Liquid/Liquefied gas
Function: Performs adiabatic expansion and flow control for easier evaporation. -
-
(5) Evaporator
Condition: Liquefied gas/Gas
Function: Cools the air by absorbing the heat from the air around the evaporator. -
-

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3) Description for Each Cycle
(1) Compression
The evaporated refrigerant in the evaporator enters to the compressor. And the refrigerant gas
is compressed until it can be liquefied at ambient temperature.
Thus, the low refrigerant pressure is maintained so that the liquid refrigerant can be evaporated
actively at low temperature (around 0 ℃). -
-
(2) Condensation
The high pressure and high temperature gas (refrigerant) from the compressor is cooled down
by the fresh air entered into the condenser. Then, this gas is converted to liquid and collected
in the receiver drier.
The heat generated from the high pressure refrigerant is dissipated to the ambient air, and it is
called "heat of condensation".
The heat of condensation is the summation of the heat of vaporization (heat that the refrigerant
absorbs from the inside of the vehicle) and the calorific value converted from the amount of
work which is needed to compress. -
-
(3) Expansion
The liquid refrigerant lowers the pressure making its evaporation easily accomplished.
This process (lowering the pressure to the level at which evaporation easily takes place before
the liquid refrigerant is sent to the evaporator) is called
"Adiabatic Expansion".
During adiabatic expansion, the expansion valve lowers the pressure of the refrigerant and
determines the correct amount of refrigerant going into the air conditioning evaporator.
That is, the amount of heat, which is needed to stop the evaporation, is determined according
to the cooling load.
The expansion valve detects this and regulates the amount of the refrigerant exactly. -
-
(4) Evaporator
The refrigerant is converted from liquid to gas in the evaporator.
(The refrigerant in the form of fog in the evaporator is vaporized actively)
At this time the refrigerant, in the form of liquid, absorbs the heat in the air which is need for
evaporation (latent heat) and is cooled down. Then the blower blows the cooled air inside the
vehicle to lower the temperature.
There are liquid refrigerant from the expansion valve and evaporated refrigerant in the
evaporator.
The evaporation temperature can be predicted from the evaporation pressure (i.e. relationship
between saturation pressure and saturation temperature).
It is important to keep the pressure inside the evaporator low, so that the refrigerant is
evaporated at low temperature to make sure the completely evaporated refrigerant is entered
into the compressor. -
-
-
-
-

01-26
7. A/C CIRCUIT DIAGRAM
1) A/C (AUTO): PWM Motor, Compressor, Air Mix Motor,
Sun-Load Sensor, Intake Air Temperature Sensor (Thermo AMP)

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2) A/C (AUTO): Blower motor (mode, air source), Inside air/Humid
sensor, Outside air temperature sensor