SsangYong Musso. Service manual - part 538

7D-6  FATC-HAVC

VENTILATION SYSTEM

COMPONENT LOCATOR

FATC-HAVC  7D-7

FUNCTION DESCRIPTION

1. AUTO switch

z

By pressing the AUTO switch, set temperature, AUTO,
fan speed, air source, air flow mode will be appeared
on the VFD display.

z

Following items will be controlled automatically
according to set temperature.

- Mode and intake door

- Temperature door

- Blower fan speed

- Compressor ON/OFF control

z

When AUTO switch is released, other functions will
be controlled automatically except for manually
selected switches.

2. MODE switch

z

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

z

Press this switch and the airconditioner system will
be turned OFF.

4. Temperature UP/DOWN switch

z

This switch is a switch increasing or decreasing set
temperature and position of the temperature door
will be automatically controlled according to set
temperature and outlet temperature will be controlled
by adjusting blending ratio of cold and hot air.

z

By operating the switch, set temperature will be
increased/decreased by 0.5°C.

z

Set temperature range is 17 - 32°C.

z

Max. cold function will be performed at set temperature
of 17°C and max. hot function will be performed at
set temperature of 32°C.

z

When pressed more than 1 second, it will be
automatically UP/DOWN by interval of 0.28 sec. after
1 second.

z

When it changed 17.5°C

→

17°C, 31.5°C

→

32°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

z

By pressing this switch, DEF will turn on and mode
door will be fixed at DEF.

z

Recirculation/fresh air switch will be fixed as FRESH.

z

When airconditioner is turned ON and ambient
temperature is less than 1.5°C, the airconditioner
will be turned off.

z

Selection of airconditioner OFF is possible by manual.

6. A/C switch

z

The airconditioner system will be turned ON or OFF
by pressing this switch.

7. Recirculation•fresh air switch

z

Air intake will be automatically switched to recirculation
or fresh air (REC

→

FRE) by pressing this switch.

8. Blower switch (UP/DOWN)

z

Blower speed can be controlled by manual and if fan
UP/DOWN switch is pressed when AUTO mode is
selected, fan speed will UP/DOWN based on current
fan level.

z

When 6 segments are turned on, it is max. HI
operation.

z

When pressed more than 1 second, it will be
automatically UP/DOWN by interval of 0.28 sec. after
1 second.

z

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, there
will be operating sounds 3 times during 0.1 sec.

z

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 set

temperature 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

pressed

Fault

17

Fault 17

Airconditioner
switch
pressed

Fault

11

Fault 11

←

→

←

→

0.1 sec.

0.1 sec.

←

→

←