SSANGYONG KORANDO 2013 Service Manual

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Heater & A/C control assembly
Heater and A/C control assembly design and switch arrangement changed
- Digital display (LCD display) with FATC used
- Push button type switch used (self-return type)
2. MAJOR CHANGES
Change of air conditioner pipe
With MTC
With FATC
With MTC
With FATC
Changes in heater and control assembly
Liquid and suction pipe
Liquid and suction pipe route changed due to change of headlamp mounting bracket

1. OVERVIEW
The climate system in the vehicle is an air regulating system which keeps the indoor air pleasant through
the heating, ventilation and air conditioning systems. The air conditioning systems fall in to two
categories; FATC (Full Automatic Temperature Control), which is a temperature control device which
receives signals from various sensors (ambient temperature sensor, water temperature sensor, sun-
load sensor, AMP sensor) and control switches to control the blower motor and all kinds of actuator
(mode door actuator, mix door actuator, air source door actuator) through MICOM in the FATC,
therefore, the interior temperature of the vehicle is kept to the temperature which is set by a driver and
MTC (Manual Temperature Control), which controls all the actuator and blower motor by the driver.

2. LAYOUT
1) Exterior Layout
Liquid and suction pipe
The high/low-pressure A/C refrigerant flows
through this pipe. It is fitted with the refrigerant
pressure sensor.
Electric fan
It cools down the A/C condenser to speed up the
compression for the refrigerant in the condenser.
Refrigerant pressure sensor
It is mounted to the latter part of the right
headlamp. It converts the A/C refrigerant pressure
to voltage value and sends it to the engine ECU.
A/C compressor
It is installed to the left side of the engine
assembly, compresses the low-temperature and
low-pressure coolant and converts it to the high-
temperature and high-pressure coolant. Then, it
sends the coolant to the A/C condenser.

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A/C condenser & receiver drier
It is installed in front of vehicle and condenses vapor
refrigerant into low temperature and high pressure liquid
refrigerant. The receiver drier is built in it.Ambient temperature sensor
It is mounted to the front section of the
vehicle and detects the ambient
temperature to send the voltage value
according to the resistance change to
the heater and A/C control assembly.
Engine ECU
It controls the A/C compressor, electric fan
and PTC heater according to the signal from
the A/C control panel.
Expansion valve
It is mounted to the inlet of the evaporator
core and supplies the appropriate quantity
of refrigerant to the evaporator.
Integrated receiver drier

2) Interior Layout
Sun load sensor
It is mounted to the upper left-
hand of the instrument panel and
detects the sun-load enters to the
interior through the windshield
with a photo diode. Incar sensor
It is mounted to the rear of the
heater and A/C control panel
(with FATC) and detects the
interior air temperature drawn
through the senor inlet.Air conditioner module
It is mounted to inside of the
instrument panel and has the
evaporator core, heater core,
PTC heater and corresponding
actuator and different sensors.
Heater & A/C control assembly
With FATC With MTC
It falls in to two categories; FATC (Full Automatic Temperature Control) and MTC (Manual Temperature
Control), which controls the air conditioning system's operation.

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Intake sensor
It is mounted to the side of
evaporator core and detects the
temperature of the evaporator
core.Water temperature
sensor
It is mounted to the heater pipe
part and detects the coolant
temperature.
3) Air Conditioner Module Layout
Temp actuator
It changes the air mix door
opening according to the
control command from the
heater and A/C control
assembly.Evaporator core
It cools the surrounding air by
passing through the low-
temperature and low-pressure
refrigerant sprayed from the
expansion valve.
Heater core
It is mounted to the left-hand of
the air conditioner module and
heats the indoor using the heat
of the engine coolant.
Mode actuator
It controls the air outlet damper
to the five directions according
to the control command from
the heater and A/C control
assembly.

Blower motor
It is mounted to the bottom of
the blower box and sends the
air inside of the vehicle. PTC heater
It is mounted to the heater air
outlet in the heater module
and warms the air from the
heater to the air vent.
Intake actuator
It changes the air source selection
mode according to the control
command from the heater and A/C
control assembly.A/C filter
It is mounted to the top of the
blower motor and filters the air
before it is discharged through
the duct.
MOS module
It controls the rotation speed of
the blower motor by receiving the
fan speed control signal from the
heater and A/C control assembly.

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3. FATC SYSTEM OPERATION PROCESS
1) Input/Output Factors
FATC (Full Automatic Temperature Control) is a temperature control device which receives signals from
various sensors (interior temperature sensor, ambient temperature sensor, water temperature sensor,
sun-load sensor) and control switches to control the blower motor and all kinds of actuator (mode door
actuator, mix door actuator, air source door actuator) through MICOM in the FATC, therefore, the interior
temperature of the vehicle is kept to the temperature which is set by a driver. The driver can check the
status of A/C through the LCD display of the A/C control assembly. The fan speed and the temperature
are adjusted automatically by the input values from different sensors to keep indoor air fresh. If the FATC
system has any defect, the self-diagnosis is used for the system to make it easier to detect the fault.

2) Function
(1) Function of heater and A/C control assembly with FATC
LCD display
Indoor set temperature indicator
AUTO mode operation indicator
A/C operation indicator
Defrost mode indicator
Fresh air mode indicator
Air recirculation mode indicator
Vent & foot mode indicator
Fan speed indicator 1.
2.
3.
4.
5.
6.
7.
8.
Temperature control dial
To set the temperature, turn the dial to the left or
right. The LCD display shows the set
temperature.
AUTO switch
When pressing this switch, "AUTO" is shown on
the display and the fan speed and air distribution
mode are adjusted automatically to keep interior
temperature to the set temperature.
ON/OFF switch
Pressing the switch turns the FATC on/off. When
the FATC is turned on, it memorizes the previous
status before becoming off.
Defroster mode switch
This is used to remove the condensation from the
windshield. When you press the switch, the
indicator comes on and the air distribution is
changed to the windshield at the same time, then
the air conditioner starts to operate. When you
press the switch again, the indicator goes off and
the air distribution returns to the previous status.