2003 SSANGYONG MUSSO Service Manual

FATC-HAVC 7D-5
FATC BLOCK DIAGRAM
INCAR SENSOR
AMBIENT SENSOR
WATER TEMPERATURE SENSOR
SUN LOAD SENSOR
TEMPERATURE SWITCH
BLOWER SWITCH
MODE SWITCH
DEFROSTER SWITCH
INTAKE SWITCH
AUTO SWITCH
A/CON SWITCH
OFF SWITCH
TEMP DOOR POSITION FEEDBACKVOLTAGE
POWER TRANSISTOR COLLECTORVOLTAGE
VFD
MAX HI RELAY
POWER T/R
BLOWERMOTOR
ECUCOMPRESSOR
MIX ACTUATORMIX DOOR
INTAKE ACTUATORINTAKE DOOR
MODE ACTUATORMODE DOOR
Airconditioner output
C ON
T
RO L
UN I
T

7D-6 FATC-HAVC
VENTILATION SYSTEM
COMPONENT LOCATOR

FATC-HAVC 7D-7
FUNCTION DESCRIPTION 1. AUTO switch
By pressing the AUTO switch, set temperature, AUTO, fan speed, air source, air flow mode will be
appeared on the VFD display.
Following items will be controlled automaticallyaccording to set temperature. - Mode and intake door
- Temperature door- Blower fan speed- Compressor ON/OFF control
When AUTO switch is released, other functions will be controlled automatically except for manually selected switches.
2. MODE switch
By pressing the MODE switch while the AUTO switch is turned ON, AUTO indicator light will go off and air flow mode will be controlled manually in the order of VENT B/L FLR MIX VENT.
3. OFF switch
Press this switch and the airconditioner system will
be turned OFF.
4. Temperature UP/DOWN switch
This switch is a switch increasing or decreasing set temperature and position of the temperature doorwill be automatically controlled according to set temperature and outlet temperature will be controlled
by adjusting blending ratio of cold and hot air.
By operating the switch, set temperature will beincreased/decreased by 0.5 °C.
Set temperature range is 17 - 32 °C.
Max. cold function will be performed at set temperatureof 17 °C and max. hot function will be performed at
set temperature of 32 °C.
When pressed more than 1 second, it will beautomatically UP/DOWN by interval of 0.28 sec. after1 second.
When it changed 17.5 °C17 °C, 31.5 °C32 °C and
DOWN switch is pressed after 17 °C or UP switch is
pressed after 32 °C, there will be operating sounds 3
times during 0.1 sec. 5. DEFROST switch

By pressing this switch, DEF will turn on and mode
door will be fixed at DEF.
Recirculation/fresh air switch will be fixed as FRESH.
When airconditioner is turned ON and ambienttemperature is less than 1.5 °C, the airconditioner
will be turned off.
Selection of airconditioner OFF is possible by manual.
6. A/C switch
The airconditioner system will be turned ON or OFF by pressing this switch.
7. Recirculation fresh air switch
Air intake will be automatically switched to recirculationor fresh air (REC FRE) by pressing this switch.
8. Blower switch (UP/DOWN)
Blower speed can be controlled by manual and if fan UP/DOWN switch is pressed when AUTO mode isselected, fan speed will UP/DOWN based on currentfan level.
When 6 segments are turned on, it is max. HI operation.
When pressed more than 1 second, it will beautomatically UP/DOWN by interval of 0.28 sec. after 1 second.
When segment is changed stage 2 stage 1 (LO),
stage 5 stage 6 (HI) and HI switch is pressed in HI
status or DOWN switch is pressed in LO status, therewill be operating sounds 3 times during 0.1 sec.
When switch is operated in OFF status, it will be operated as stage 1 (1 segment display).

7D-8 FATC-HAVC Self-diagnosis Method
Ignition switch “ON ”
Press the intake switch more than 4 times within
2 seconds while pressing the AUTO switch
Self-diagnosis will start after turning off all displays on VFD for 2.5 seconds
Self-diagnosis items check (continuous action)
Airconditioner control
Self-diagnosis items check
(step action)
Press AUTO Press AUTO Press OFF
Press OFF
DIAGNOSIS TEST
FATC airconditioner system has self-diagnosis function.
Turn the ignition switch ON and press intake switch more than 4 times within 2 seconds while the AUTO switch is
1 AUTO Switch
2 Intake Switch
3 OFF Switch 4 Airconditioner Switch
5 Set temperature Display
pressed, then it will diagnose incar sensor, ambient
sensor, water temperature sensor and temperature actuator for open/short and will display numerical fault code on the set temperature display of VFD.
DIAGNOSIS

FATC-HAVC 7D-9
Diagnosis Item and Fault Code Self-diagnosis Display
1. Data will be displayed at the set temperature display as 2-digit number during self-diagnosis function and other settemperature displays will be OFF.
2. Display of self-diagnosis fault code will be blinking fault code number in the intervals of 0.5 sec.
3. Following fault code number will be displayed at the set temperature display during self-diagnosis function.
4. If no defective, normal display number (00) will blink. Display during continuous action
A. Normal or 1 fault (00 or 11) 15: coolant Sensor Open
16: coolant Sensor Short
17: temperature Actuator Open/Short
18: temperature Actuator Drive Fault
00: normal
11: incar Sensor Open
12: incar Sensor Short
13: ambient Sensor Open
14: ambient Sensor Short
B. Multiple faults (11,13,15.........) Display during step action
A. Normal or 1 fault : the same as continuous action
B. Multiple faults

0.1 sec. 0.1 sec.
0.5 sec.
ON
0.5 sec.OFF
ON
OFF
Display
Buzzer
0.5 sec.Fault 13
0.5 sec.OFF
Fault 15
OFF
Display
Buzzer
Fault 13 Fault 17
Display Buzzer AUTO switch pressedFault
17 Fault 17
Airconditioner switchpressedFault11 Fault 11


0.1 sec. 0.1 sec.

7D-10 FATC-HAVC Fault Safety Function
FATC airconditioner system not only performs self-diagnosis but also has safety function against faults if there is open or
short in the incar sensor, ambient sensor, water temperature
sensor and temperature door potentiometer.
NO.ItemDefects
Fault safety function
1Incar sensor Open or short Control When substituted 25 °C
2
Ambient sensor Control When substituted 20°C
3
Water temperature sensor Perform heating maneuver control function under
refrigeration maneuver control entering conditions
and release after 10 minutes.
4 Temperature door potentiometer Set temperature 17 - 24.5
°C:max. COLD position
Set temperature 25 - 32 °C:max. HOT position
Open or short Open or short Open or short

FATC-HAVC 7D-11
1 AUTO Switch
2 MODE Switch
3 OFF Switch
4 Temperature UP/DOWN Switch
5 Defrost Switch6 Airconditioner Switch
7 Recirculation

fresh Air Switch
8 Blower Switch (UP/DOWN)
9 VFD (Vacuum Fluorescent Display)
MAINTENANCE AND REPAIR
FATC CONTROL PANEL Components

7D-12 FATC-HAVC Pin Number and Connection Circuit
Pin No.1 Connection circuit
2 3456789
10 11
1213141516
Rheostat Tail lamp
Battery (+)
Power TR (B) Power TR (C)
Temperature actuator (CCW) IG2
Ground
Airconditioner switch ground HI speed relay
Photo sensor (+)
Photo sensor (-)
Temperature actuator F/B
Temperature actuator (CW) IG2
Ground
Connector A
Pin No.
1 Connection circuit
2 345 6 789
101112131415
Incar sensor (+)
Ambient sensor (+) Coolant sensor (+)
Sensor voltage 5V Sensor ground
Intake (ambient) Intake (incar)
- --
VENT
B/L
FLR MIX
DEF
--- - -
Connector B
17 18
19
20
16