LG AG4AH12BWF01(9K) Owner's Manual

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Diagram illustrating the internal components of an LG air conditioner unit, showing various parts such as coils, fans, compressors, and connecting pipes, likely for parts identification.

Operation Details

(1) The Function of Main Control

1. Time Delay Safety Control

Compressor is ceased for 3 minutes to balance pressure in the refrigeration cycle (Protection of compressor).
Indoor fan is ceased for 2 seconds to prevent relay noise (Protection of fan relay and micro chip).
4-way valve is ceased for 30 seconds to prevent refrigerant-gas abnormal noise when Heating operation is OFF or switched to another mode.

2. Airflow Direction Control

This function allows the louver to swing automatically up and down and be set at the desired position.

Procedure:

Press the ON/OFF Button to operate the product.
Press the Airflow Direction Control Button to swing the louver up and down automatically.
Repress the Airflow Direction Control Button to set the louver at the desired position.

Operating Mode	Louver Position
Start	2
Cooling	Auto. Swing	1-4
Start	3
Heating	Auto. Swing	3-6

Horizontal Louver Position Diagram: Shows angles from 0° to 8° (Close) for Cooling (approx. 32°) and Heating (approx. 32°).

3. Cooling Mode Operation

When selecting the Cooling Mode, the unit operates according to the remote controller settings. The operation diagram is as follows:

Cooling Mode Operation Diagram: Shows Intake Air temperature fluctuations relative to COMP. ON (SET TEMP. +0.5°C) and COMP. OFF (SET TEMP. -0.5°C). INDOOR FAN operates at 'Selecting fan speed' or 'Low'. COMPRESSOR cycles ON and OFF. Mentions 'More than 3 minutes' for compressor off periods.

4. Cooling or Heating Mode with Sleep Mode Auto Operation

When selecting Cooling or Heating combined with Sleep Mode Auto Operation, the operation diagram is as follows.

Cooling Mode with the Sleep Mode

The setting temperature is raised by 1°C after 30 minutes and by 2°C after 1 hour. The operation will be stopped after 1, 2, 3, 4, 5, 6, or 7 hours.

Cooling Mode with Sleep Mode Diagram: Illustrates Intake Air temperature changes over time, showing periods of COMP. ON and COMP. OFF, with INDOOR FAN set to Low. Includes 30-minute intervals and temperature increments of 1°C and 2°C.

Heating Mode with the Sleep Mode

The operation will be stopped after 1, 2, 3, 4, 5, 6, or 7 hours.

Heating Mode with Sleep Mode Diagram: Shows temperature cycles with Setting Temp. +3°C (Compressor OFF) and Setting Temp. (Compressor ON). INDOOR FAN is set to 'Med.', and COMPRESSOR cycles ON and OFF.

5. Fuzzy Operation

The operation procedure is as follows:

Press Start/Stop Button
Select Fuzzy Operation Mode
Check the Room temperature

Operation mode, indoor fan speed, and setting temperature are automatically decided by Fuzzy rule.

Intake-air temperature	Operation Mode
below 21 °C	Heating
Over 21 °C ~ below 24°C	Soft Dry
Over 24°C	Cooling

* If initial mode is decided, that mode is continued despite of the room temperature changing.

Fuzzy Operation for Cooling

Operation condition	Intake-air Temperature	Setting Temperature	Fan speed	Air Direction Control
When Fuzzy Operation initial start	Over 26 °C	25°C	1/f rhythm	Controlled by Fuzzy logic
	Over 24°C~below 26 °C	Intake air -1 °C
	Over 22°C~below 24 °C	Intake air -0.5°C
	Over 20°C~below 22 °C	Intake air temperature
When Switch to Fuzzy Operation	below 20 °C	20°C	Fuzzy control	-
When Switch to Fuzzy Operation	Over 20°C~below 30°C	20°C	Fuzzy control	-
	over 30°C	30°C

Fuzzy Operation for Cooling Diagram: Illustrates Intake-Air temp. fluctuations relative to Setting Temp. +0.5°C (Compressor OFF) and Setting Temp. -0.5°C (Compressor ON). INDOOR FAN operates at 'Fuzzy Speed', and COMPRESSOR cycles ON and OFF.

Fuzzy Operation for Soft Dry

The Setting temperature is set to match the current intake-air temperature.

Compressor ON temperature: Setting temperature +1 °C
Compressor OFF temperature: Setting temperature -0.5°C

Fuzzy Operation for Heating

Intake Air temp.	Setting temp.
Below 20°C	20°C
Over 20°C~below 21°C	Intake air temperature +0.5°C

Fuzzy Operation for Heating Diagram: A graph showing Setting temp. (21°C) and Intake air temp. (+5°C) relative to Intake-Air temp. on the x-axis (18°C to 21°C). Shows operational states at different temperature points.

6. Heating Mode Operation

The unit operates according to the remote controller settings. The operation diagram is shown as following.

Heating Mode Operation Diagram: Illustrates Intake Air temp. changes relative to SETTING TEMP. +3°C (Compressor OFF) and Setting temp. (Compressor ON). INDOOR FAN cycles through OFF, Selecting fan speed, and LOW. COMPRESSOR cycles ON and OFF. Points A and B are defined: A point - indoor pipe temperature to be 35°C; B point - indoor pipe temperature to be 35°C. Indoor fan operates minimum 10sec. even if falls lower than 35°C.

7. Hot- Start Control

The indoor fan stops until the evaporator piping temperature reaches 28°C (BY TEMPERATURE).

Hot-Start Control Diagram: Shows PIPE TEMP. 28°C. INDOOR FAN cycles through OFF, LOW, and SELECTING FAN SPEED. COMPRESSOR is ON. Includes a 60-second duration marker.

8. Deice Control

Deicing operation is controlled by timer and sensing the indoor pipe temperature.

Temperature difference ΔT1 between indoor pipe temperature and indoor intake air temperature is checked after 25 minutes of heating operation.
Temperature difference ΔT2 between indoor pipe temperature and indoor intake air temperature is checked after 60 minutes of heating operation.
Deicing time is controlled by difference ΔTd of ΔT1 and ΔT2.
The deicing time and operation diagram are as follows.

Deicing Diagram: A graph showing TEMP °C over time, illustrating Heating, Deicing, and Hot Start phases. It plots Pipe Tmp. and Intake Air Temp. and indicates durations of 25mins and 60mins. A table shows COMPRESSOR, 4-WAY VALVE, OUTDOOR FAN, INDOOR FAN, and DEICE LED states during these phases.

ΔT1-ΔT2=ΔTd	Over 3.5°C	3.0~3.5°C	2.5~3.0℃	2.0~2.5°C	below 2.0°C
Deicing Time	12 mins	11 mins	10 mins	9 mins	Heating Operation

9. Soft Dry Operation

During Soft Dry Operation, the compressor ON temperature is the setting temperature plus 1°C, and the compressor OFF temperature is the setting temperature minus 0.5°C.

When the room temperature rises over the compressor ON temperature, the operation mode switches to Cooling mode.
When the room temperature falls between the compressor ON and OFF temperatures, the operation mode switches to Soft Dry Operation.

In this temperature range, the operation repeats 10min. Dry Operation, 5.5min operation OFF, 1.5min. fan-only operation. During the 10min Dry operation, even if the room temperature falls below the compressor OFF temperature, the 10min(MAX) Compressor ON period includes 4 min. Compressor ON operation below the compressor OFF temperature.

In micom dehumidify mode, fan speed control is as follows:

Soft Dry Operation Diagram: Illustrates ROOM TEMP. fluctuations relative to SETTING TEMP. +1 °C (COMP. ON) and SETTING TEMP. -5°C (COMP. OFF). INDOOR FAN cycles through Selecting fan speed, OFF, and LOW. COMPRESSOR cycles ON and OFF. Includes time markers for operation and off periods (e.g., 1 minute, 10 minutes, 5.5 minutes, 2 minutes, 1.5 minutes, maximum 4 minutes, maximum 10 minutes).

10. Forced Operation

If the wireless remote controller is lost, the unit can be operated using the forced operation switch.

The standard conditions are as follows:

Operation Mode	Cooling Model		Heat pump Model
	Room Temp ≥ 24°C	21°C ≤ Room Temp < 24 °C	Room temp < 21 °C
Operation Mode	Cooling	Cooling	Soft Dry	Heating
FAN Speed	High	High	Low	High
Setting Temp.	24 °C	24°C	Room Temp.	22°C

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