3. AIR CONDITIONER CONTROLLER (UNIT)

BRAKE A / BAG A/T M/T CLUTCH AXLE SP ST’NG A / CON T/C

3. AIR CONDITIONER CONTROLLER (UNIT)

Functions of Full Automatic Air Conditioner Controller

2 1 7 8 9 10 3 5 4 6 11 1. Temp SW 2. Auto SW 11. VFD(Display) 10. A/C SW 9. Defroster SW 8. Fre SW 7. AQS SW 6. Blower SW 4. Amb SW 5. Mode SW 3. OFF SW Auto control

Displays A/C status A/C ON (to Manual mode)

Manual selection of Def Mode (in Auto mode) Manual selection of Fre Mode (in Auto mode) Manual selection of Rec Mode (in Auto mode)

Fan speed control in 8 levels (33 levels in Auto mode)

Displays ambient temperature ® Return to previous display after 5 seconds

Changed to Manual mode from Auto Mode System OFF (Air source indicator stays ON)

Temperature control: Air mix actuator mixes hot air with cool air to maintain the set temperature.

* Rec Mode: Recirculation Mode * Fre Mode: Fresh Mode

Functions of Full Automatic Air Conditioner Controller (ll)

When pressing the air conditioner AUTO mode and temperature con-trol dial switch, the system operates in AUTO mode and can set the desired temperature (18 ~ 32°C) by rotating the switch. To get the desired temperature, the air conditioner controls compressor, door mode, air source door, air mix door and blower motor automatically.

Active Incar/Humidity Sensor (AIH Sensor)

Display Window (VFD)

Each switch mode appears as a symbol on the fluorescent display and malfunction of each sensor in air conditioner control system is also displayed.

- The AIH sensor is installed on the air conditioner con-troller unit. It is a sensor that detects interior tem-perature and humidity.

Temperature (ambient air temperature, interior

set temperature)

Indicates the ambient temperature is displayed Fan speed A/C operation Auto mode Fresh air Air recirculation Defroster AQS mode

BRAKE A / BAG A/T M/T CLUTCH AXLE SP ST’NG A / CON T/C

Fan Speed Control Switch and AMP Switch

A/C [OFF] Switch A/C Switch:

When pressing this switch, the air conditioner operates in manual mode and A/C ON indicator comes on.

Air Source Selection Switch

When pressing this switch, the air recircu-lates in the vehicle and indicator comes on. When pressing it again, the indicator goes off and the fresh air comes in.

(However, under defroster mode or defroster/ foot mode, it stays in the fresh air mode.)

Defroster Switch

When pressing this switch, the airflow direction will be changed to windshield and door glasses, the air conditioner operates automatically and outside air comes in. At this moment, the defroster indicator, air conditioner indicator and fresh air mode indicator come on. When pressing the switch again, the air conditioner returns back to pevious operation.

Mode Switch

• By depressing this switch, the airflow mode is changed.

AQS Switch

Air Quality System (AQS) changes the air source selection to recirculation mode when polluted air is detected through AQS sensor. The air source selection returns back to fresh air intake mode after a specified period or the polluted air disappears (refer to AQS and am-bient temperature sensor).

When pressing the AUTO switch, the defroster mode appears on the VFD until the coolant temperature reaches at a certain level.

The air flows towards face. (Vent mode)

The air flows towards face and floor. (Bi-level mode)

The air flows towards floor.

(Foot mode)

The air flows towards front windshield and

floor.

(Defrost and foot mode)

AQS mode

Fresh air

• When controlling the fan speed by rotating this switch in AUTO mode, the mode is changed from AUTO to manual and the fan speed can be changed in 8 levels. • When pressing this switch, the outside

temperature measured by ambient temperature sensor comes on for 5 seconds and then returns back to preset temperature.

Full Automatic Air Conditioner Controller Operation Table

If the temperature switch (dial) is set under 18.0 , the display shows "Lo" and if it is set over 32.0 , the display shows "Hi".

1 2 17 4 5 18 14 13 19 20 15 16 3 6 12 11 10 9 8 7 REC FRE FR/DEF FAN speed 0 FAN speed 1 FAN speed 2 FAN speed 3 FAN speed 4 FAN speed 5 FAN speed 6 FAN speed 7 FAN speed 8 MODE VENT MODE B/L MODE FOOT MODE D/F AUTO (AUTO A/C) A/C

AQS AMB

BRAKE A / BAG A/T M/T CLUTCH AXLE SP ST’NG A / CON T/C

Full Automatic Air Conditioner Operations

This section describes the main operations of full automatic air conditioner.

Fan control in AUTO mode (33 levels)

Fan control in MANUAL mode (8 levels)

In winter, when the engine coolant temperature is low or the hot wind has not been sufficiently generated, the airflow from the vent is not hot and so, not helpful to heating. The heating control is to restrain this airflow from releasing. Thus, before the coolant temperature reaches 55°C, the blower motor is set to the first stage in Auto mode and the blower operating voltage increases by 0.075V/sec, following the increase of duct temperature.

The air flow direction is in DEF mode (below 20°C), D/F mode (20°C~55°C) and AUTO mode (55°C).

When the coolant temperature sensor is defective, the heating control function is cancelled after 500 seconds.

Level OFF 1 2 3 4 5 6 7 8 Control voltage 0 V 4 V 4.25 V 4.5 V 4.75 V 5 V 5.25 V 5.5 V 5.75 V Level 9 10 11 12 13 14 15 16 17 Control voltage 6 V 6.25 V 6.5 V 6.75 V 7 V 7.25 V 7.5 V 7.75 V 8 V Level 18 19 20 21 22 23 24 25 26 Control voltage 8.25 V 8.5 V 8.75 V 9 V 9.25 V 9.5 V 9.75 V 10 V 10.25 V Level 27 28 29 30 31 32 33 Control voltage 10.5 V 10.75 V 11 V 11.25 V 11.5 V 11.75 V VACC Blower Motor Control

In AUTO mode, the blower motor automatically controls the fan in 33 levels according to the sensing conditions (e. g., ambient temperature and room temperature). In MANUAL mode, the blower motor controls the fan in 8 levels by the fan switch operation.

Level Control voltage 1 4 ~ 4.75 V 8 11 ~ Battery voltage

Heating Start Control 2 5 ~ 5.75 V 3 6 ~ 6.75 V 4 7 ~ 7.75 V 5 8 ~ 8.75 V 6 9 ~ 9.75 V 7 10 ~ 10.75 V 8th level 1st level

The blower fan is controlled in 33 levels according to the input data from sensors. The higher the lever is, the higher the output voltage increases (control voltage in 33rd stage: battery voltage).

Recirculation/Fresh Air Control

A. AUTO control: Fresh air, 20% of fresh air, Recircu-lated air

B. MANUAL control: Fresh air, Recirculated air C. COMP OFF control: Fresh air (AUTO mode) D. PTC linked control: When PTC is activated, the

recir-culation door is fixed at 30% of fresh air position. When PTC is deactivated, it returns to previous mode. E. AQS control: In initial stage, the recirculation mode is activated for 35 seconds. After then AQS sensor con-verts the mode between recirculation and fresh air.

COMP Control

High Intake Air Temperature Delay Control

When the intake temperature sensor indicates over 35°C, the voltage value increases by 1 V/sec with delay from 3 seconds after the compressor starts its operation.

- Ambient air temperature control: COMP OFF when the ambient temperature is below 0°C, COMP ON when it is over 2°C.

- Intake air temperature control: COMP OFF when the thermo AMP temperature is below 2°C, COMP ON when it is over 4°C.

When the AMB button is pressed, the ambient tempera-ture is displayed for 5 seconds. When the vehicle stops while driving, the ambient temperature before stop is displayed.

The air flow is directed to “VENT” according to the amount of sunload. In “VENT” and “B/L” modes, the blower voltage increases within 2.5 V.

Cooling Start Airflow Control

Maximum Cooling/Heating Control DEF Mode Compensation Control

In “DEF” mode, the voltage increases 2 V compared to that in “AUTO” mode. The voltage after compensation should not exceed 7 V.

When the intake temperature sensor indicates over 35°C, the voltage value increases by 1 V/sec with delay from 3 seconds after the compressor starts its operation. In the initial operation stage, the hot air is discharged to the windshield (DEF mode) for a specific period of time (approx. 5 seconds). This prevents the hot air from sud-denly discharging to the front passengers.

Amount of Sunload Compensation Control

Mode Rec/Fresh Air Air mix Air conditioner Blower motor 17.5°C (Min.) Foot Ambient air 100% OFF Hi 32.5°C (Max.) VENT Inside air 0% ON Hi

BRAKE A / BAG A/T M/T CLUTCH AXLE SP ST’NG A / CON T/C

Manual Air Conditioner Controller

Manual air conditioner controller controls the fan speed, air distribution direction, air source selection and temperature control with motor actuators according to soft button and dial switch operations.

Air Source Selection Switch

When pressing this switch, the air recirculates in the vehicle and indi-cator comes on. When pressing it again, the indicator goes off and the fresh air comes in.

When it is raining or humid, set this switch to air fresh mode and select the vent mode to remove the mois-ture on the windshield.

Temperature Control Switch

The temperature can be adjusted by rotating the switch.

Clockwise direction (red): Higher temperature Counterclockwise direction (blue): Lower tem-perature

Defroster

When pressing this switch, the airflow direction will be changed to windshield and door glasses, the air conditioner operates automatically and outside air comes in.

Defroster & Foot Mode

The air flows towards windshield and floor.

Fan Speed Control Switch

The fan speed can be adjusted in 4 levels by rotating the switch. The

operation stops when it is set to “0”. Bi-level Mode

The air flows towards front face and floor.

Vent Mode

The air flows towards face.

Foot Mode

The air flows towards floor.

A/C Switch