Lg Lau181cnw Service Manual

Internal Use Only

http://biz.lgservice.com

Room Air Conditioner

SVC MANUAL(Exploded View)

MODEL : LAN181CNW(ASNC183VML3) LAU181CNW(ASUC183VML3) LA180CPI (ASNC183VML3) LA180CPO (ASUC183VML3)

CAUTION

Before Servicing the unit, read the safety precautions in General SVC manual. Only for authorized service personnel.

Air Conditioner Service Manual

TABLE OF CONTENTS

Details of 2006 LG Model Name.................................................................................................... 3

Safety Precautions......................................................................................................................... 4

Functions...................................................................................................................................... 10

Product References .................................................................................................................... 12

Dimensions................................................................................................................................... 13

Refrigeration Cycle Diagram....................................................................................................... 15

Wiring Diagram............................................................................................................................. 16

Operation Details ......................................................................................................................... 17

Display Function .......................................................................................................................... 23

Self-diagnosis Function ...............................................................................................................23

Introduction ...................................................................................................................................24

Installation .................................................................................................................................... 25

Operation ...................................................................................................................................... 42

Disassembly of the parts (Indoor Unit)...................................................................................... 43

2-way, 3-way Valve ....................................................................................................................... 46

Cycle Troubleshooting Guide ..................................................................................................... 54

Electronic Control Device............................................................................................................ 64

Schematic Diagram...................................................................................................................... 67

Exploded View.............................................................................................................................. 69

- 2 -

LGE Internal Use Only

Details of 2006 LG Model Name

12

Code Type Code of Model Meaning

1 Producing Center/ A~Z

Refrigerant

2 Type of Air conditioner A~Z S: Split Type Air conditioner

3 Cooling/Heating A~Z C: C/O, H: H/P, X: C/O + E/H, Z: H/P + E/H

4,5 Capacity(Btu/h) 1~9 Cooling/Heating Capacity

6 Electric Range 1~9 Electric Standard

7 Chassis A~Z Name of tool of unit

8 Color A~Z R: Mirror B: Blue N: Walut

-

345678910

L: ChangWon R22, A: ChangWon R410A, C: ChangWon

Ex. "09" ➔ 9,000Btu/h

1 ➔ 115V/60Hz 6 ➔ 220~240V/50Hz 2 ➔ 220V/60Hz 7 ➔ 110V, 50/60Hz 3 ➔ 208~230V/60Hz 8 ➔ 380~415V/50Hz 5 ➔ 200~220V/50Hz 9 ➔ 380~415V/60Hz

W: White M: Metal C: Cherry

R407C

9 Function A~Z

10 Serial No. 0~9

Basic A Basic + 4Way B Plasma Filter C Plasma Filter + 4Way D Tele + LED + 4Way E Tele + LCD + Plasma F + 4Way F Tele Multi + LCD + Plasma F + 4Way G Low A + Plasma F H Low A + Plasma F + 4Way J Plasma F + 4Way + Oxygen Generator K A/change + Plasma F L A/change + Plasma F + 4Way M

- 3 -

LGE Internal Use Only

Safety Precautions

To prevent injury to the user or other people and property damage, the following instructions must be followed.

■ Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is classified by the following indications.

This symbol indicates the possibility of death or serious injury.

This symbol indicates the possibility of injury or damage to properties only.

■ Meanings of symbols used in this manual are as shown below.

Be sure not to do.

Be sure to follow the instruction.

■ Installation

Do not use damaged power cords, plugs, or a loose socket.

• There is risk of fire or electric shock.

Install the panel and the cover of control box securely.

• There is risk of fire or electric shock.

For electrical work, contact the dealer, seller, a qualified electrician, or an Authorized Service Center.

• There is risk of fire or electric shock.

Do not modify or extend the power cord.

• There is risk of fire or electric shock.

Always use the power plug and socket with the ground terminal.

• There is risk of electric shock.

Do not install, remove, or reinstall the unit by yourself (customer).

• There is risk of fire, electric shock, explosion or injury.

- 4 -

LGE Internal Use Only

Safety Precautions

8ft(2.4m)

Be cautious when unpacking and installing the product.

• Shape edges could cause injury. Be especially careful of the sharp edges.

Be sure the installation area does not deteriorate with age.

• If the base collapses, the air conditioner could fall with it, causing property damage, product failure, and personal injury.

For installation, always contact the dealer or an Authorized Service Center.

• There is risk of fire, electric shock, explosion, or injury.

Install the indoor unit on the wall where the height from the floors more then 8ft(2.4m)

• There are sharp moving parts that could cause personal injury.

Do not install the product on a defective installation stand.

• It may cause injury, accident, or damage to the product.

Do not handle the pipe by yourself(customer)

• High-Pressure refrigent may cause personal injury.

■ Operation

Use a dedicated outlet for this appliance.

• There is risk of fire or electric shock.

Grasp the plug to remove the cord from the outlet. Do not touch it with wet hands.

• There is risk of fire or electric shock.

- 5 -

Do not allow water to run into electric part.

• There is risk of fire, failure of the product, and/or electric shock.

LGE Internal Use Only

Safety Precautions

Do not place a heater or other appliances near the power cable.

•

There is risk of fire, failure of the product, and/or electric shock.

Do not use the product in a tightly closed space for a long time.

Do not let the air conditioner run for a long time when the humidity is very high and a door or a window is left open.

• Moisture may condense and wet or damage furnishings.

When flammable gas leaks, turn off the gas and open a window for ventilation before turning the product on. Do not use the telephone or turn switches on or off.

Do not store of use flammable gas or combustibles near the air conditioner.

• There is risk of fire or product failure.

Thinner

Wax

Unplug the unit if strange sounds odors or smoke comes from it.

• Oxygen deficiency could occur.

• Some ventilation by opeing window is necessary for the fresh air.

Stop operation and close any window in storm or hurricane. before the hurricane arrives.

• There is risk of property damage, failure of product, or electric shock.

• There is risk of explosion or fire.

Do not open the inlet grill of the product during operation. (Do not touch the electrostatic filter,

•

When the product is soaked (flooded or submerged), contact an Authorized Service Center.

if the unit is so equipped.)

• There is risk of physical injury,

• There is risk of electrical shock.

electric shock, or product.

There is risk of fireproduct failure and/or electric shock.

- 6 -

LGE Internal Use Only

Safety Precautions

Ventilate the product from time to time when operating it together with a stove, etc.

• There is risk of fire or electrical shock.

Take care to ensure that nobody could step on or fall onto the outdoor unit.

Unplug the appliance before performing cleaning or maintenance.

• There is risk of electric shock.

Do not insert hands or other objects through the air inlet or outlet while the air conditioner is plugged in.

When the product is not be used for a long time disconnect the power supply plug or turn off the breaker.

• There is risk of product damage or failure, or unintended operation.

■ Installation

Always check for gas(refrigerant) leakage after installation or repair of product.

• There could result in personal injury and product damage.

Install the drain hose to ensure that water is drained away properly.

• A bad connection may cause water leakage.

• There are sharp and moving parts that could cause personal injury.

Keep level even when installing the product.

• To avoid vibration or water leakage.

• Low refrigerant levels may cause product failure.

Do not install the product where the noise or hot air from the outdoor unit could damage the neighborhoods.

• It may cause a problem for your neighbors.

- 7 -

90˚

LGE Internal Use Only

Safety Precautions

■ Operation

Use two or more people to lift and transport the air conditioner

• Avoid personal injury.

Do not use the product for special purposes, such as preserving foods, works of art, etc. It is a consumer air conditioner, not a precision refrigeration system.

Do not install the product where it will be exposed to sea wind (salt spray) directly.

• It may cause corrosion in the product. Corrosion, particularly on the condenser and evaporator fins, could cause product malfunction or inefficient operation.

Do not block the inlet or outlet of air flow.

Do not direct airflow at room occupants.

• This could damage your health.

Use a soft cloth to clean. Do not use harsh detergents, solvents, etc.

• There is risk of damage or loss of property.

Do not touch the metal parts of the product when removing the air filter. They are very sharp!

• There is risk of personal injury.

• It may cause product failure.

Do not step on or put anything on the product. (outdoor unit)

• There is risk of personal injury and failure of product.

• There is risk of fire, electric shock or damage to the plastic parts of the product.

Always insert the filter securely. Clean the filter every two weeks or more often if necessary.

• A dirty filter reduces the efficiency of the air conditioner and

- 8 -

LGE Internal Use Only

Safety Precautions

Do not drink the water drained from the unit.

Use a firm stool or ladder when cleaning or maintaining the air conditioner.

• It is not sanitary and could cause serious health issues.

• Be careful and avoid personal injury.

■ Disuse

Do not recharge or disassemble the batteries. Do not dispose of batteries in a fire.

• They may burn or explode.

Replace all the batteries in the remote.

• There is risk of fire or explosion.

If the liquid from the batteries gets onto your skin or clothes, wash it well with clean water. Do not use the remote if the batteries have leaked.

• The chemicals in batteries could cause burns or other health hazards.

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LGE Internal Use Only

Functions

Indoor Unit

Operation ON/OFF by Remote controller

Sensing the Room Temperature

• Room temperature sensor. (THERMISTOR)

Room temperature control

• Maintains the room temperature in accordance with the Setting Temp.

Starting Current Control

• Indoor fan is delayed for 5 sec at the starting.

Time Delay Safety Control

• Restarting is inhibited for approx. 3 minutes.

Indoor Fan Speed Control

• High, Med, Low, CHAOS

Operation indication Lamps (LED)

Signal Receptor Receives the signals from the remote control.(Signal receiving sound: two short beeps or one long beep.) Operation Indication Lamps

On/Off : Lights up during the system operation. Sleep Mode : Lights up during Sleep Mode Auto operation. Timer : Lights up during Timer operation. Defrost Mode : Lights up during Defrost Mode or

Hot Start operation.(Heat pump model only)

Outdoor unit operation : Lights up during outdoor unit operation.

(Cooling model only)

Soft Dry Operation Mode

• Intermittent operation of fan at low speed.

Sleep Mode Auto Control

• The fan is switched to low(Cooling), med(Heating) speed.

• The unit will be stopped after 1, 2, 3, 4, 5, 6, 7 hours.

Defrost(Deice) control (Heating)

Operation indication lamps

Natural Air Control by CHAOS Logic

• The fan is switched to intermittent or irregular operation

•

The fan speed is automatically switched from high to low speed.

Airflow Direction Control

• The louver can be set at the desired position or swing up and down automatically.

- 10 -

• Both the indoor and outdoor fan stops during defrosting.

Hot-start Control (Heating)

• The indoor fan stops until the evaporator pipe temperature will be reached at 28°C.

LGE Internal Use Only

Healthy Dehumidification Operation Mode.

( )

Remote Control

Operation ON/OFF

Reset

Operation Mode Selection

Temperature Setting

Timer Selection

Timer Setting

JET COOL

Timer Cancel

Sleep Operation

Airflow Direction Control

(Cooling

model only)

(Heating

model only)

TEMPERATURE

LOW HIGH

Cooling Operation Mode.( )

Heating Operation Mode.( )

Auto Operation Mode.( )

Air Circulation

°C To °F Swiching Button

Room, Temperature Checking

Setting the Time or Timer

Fan Speed Selection

(Low) (Med) (High)

ON

OFF

CANCEL

SET

2nd F

°C/°F

Functions

: (Low:11°C High:39°C)

: OFF, ON, OFF ON

: Cancel Sleep Mode, Timer ON or Timer OFF

: 1, 2, 3, 4, 5, 6, 7, Off Timer

Cooling

Down to 18°C Up to 30°C

Heating

Down to 16°C Up to 30°C

: Fan Operates without cooling or heating.

- 11 -

LGE Internal Use Only

Product References

Items Unit Power Supply ø, V, Hz 1, 208/230, 60 Cooling Capacity BTU/h 17 800/18 000 Input W 2,040/2,040 Running Current A 9.8/8.9 COMP. Locked Rotor AMP. A 25*2 S.E.E.R 13 Air Circulation m3/min(cfm) 13(460) Moisture Removal l/h(pts/hr) 2.5(5.3) Noise Level Indoor, High dB(A)±3 44 (Sound Med dB(A)±3 40

Pressure, 1m) Low dB(A)±3 36

Outdoor, Max dB(A)±3 55

Features Temperature Control Thermistor

Air Deflection 4-way Steps, Fan/Cool 3/4 Airflow Direction Control(up&down) Auto Airflow Direction Control(left&right) Auto Remocon Type Wireless LCD Setting Temperature Range, Cooling Mode 64~86°F(18~30°C) Temperature Increment 2°F(1°C) Auto Operation(electronic control) Yes Self Diagnosis Yes Timer 24hr, On/Off Sleep Operation Yes Healthy Dehumidification Mode Yes

Restart Delay minutes 3 Refrigerant(R-410A) Charge g(oz) Power cord AWG #: P*mm Fuse or breaker Capacity A 20 Connecting Cable AWG #: P*mm Connecting Tube Liquid Side mm(in) 6.35(1/4) (ø. Socket Flare) Gas Side mm(in) 12.7(1/2)

Length, std m(ft) 7.5(25) Additional Drain Hose(Outer Dia.) mm(in) 19(3/4) Dimensions Indoor mm 928*522*147 (WxHxD) in 361/2*2019/32*525/32

Outdoor mm 870*655*320

in 34.3*25.8*12.6

Net Weight Indoor kg(lbs) 17(37.5)

Outdoor kg(lbs) 68(149.9) Gross Weight Indoor kg(lbs) 19(41.9)

Outdoor kg(lbs) 71(156.5)

LA*181CNW(AS-C183VML3)/LA180CP* (AS-C183VML3)

2

960(34)

14:3*2.5

18:4*0.75

NOTE: Please refer to Label Quality on the product since this specification may be changed for improving

performance

- 12 -

LGE Internal Use Only

522

928

147

Pipe Hole Fix Hole

Dimensions

Indoor Unit

Dimensions

MODEL

Indoor Unit

DIM Unit

W mm(inch) 928(36.5)

H mm(inch) 522(20.6)

D mm(inch) 147(5.8)

- 13 -

LGE Internal Use Only

Dimensions

W

L6 L5 L7 L8

D

L1

L2

L9L10

L3L4

H

Gas side 3-way valve

Liquid side 2-way valve

Outdoor Unit

MODEL

DIM

W mm(inch) 870(34.3)

H mm(inch) 655(25.8)

D mm(inch) 320(12.6)

L1 mm(inch) 370(14.6)

L2 mm(inch) 25(1.0)

L3 mm(inch) 630(24.8)

L4 mm(inch) 25(1.0)

L5 mm(inch) 546(21.5)

L6 mm(inch) 162(6.4)

L7 mm(inch) 162(6.4)

L8 mm(inch) 54(2.1)

L9 mm(inch) 74.5(2.9)

L10 mm(inch) 79(3.1)

OUTDOOR UNIT

- 14 -

LGE Internal Use Only

Refrigeration Cycle Diagram

Cooling Only Models

Refrigeration Cycle Diagram

INDOOR UNIT

HEAT EXCHANGER (EVAPORATOR)

LIQUID SIDE

GAS SIDE

OUTDOOR UNIT

CAPILLARY TUBE

HEAT EXCHANGER (CONDENSER)

COMPRESSOR

Pipe size(Diameter:ø) Piping length Elevation

MODEL

Gas Liquid Rated Max Rated Max

18K

(Cooling Only)

For installation over rated, *a proper quantity of refrigerant should be added for each meter.

a proper quantity of refrigerant

18K 20g

1/2" 1/4" 7.5m(24.6ft) 30m(98.4ft) 5m(16ft) 15m(49ft)

Ex) 18K: When installed at a distance of 30m, 450g of

refrigerant should be added. (30-7.5) x 20g = 450g

- 15 -

LGE Internal Use Only

Wiring Diagram

Indoor Unit

18K (Cooling Only Models)

Outdoor Unit

- 16 -

LGE Internal Use Only

Operation Details

MAIN UNIT FUNCTION

• DISPLAY

1) C/O Model

Operation Indicator

• ON while in appliance operation, OFF while in appliance pause.

• Flashing while in disconnection or short in Thermistor. (3 sec off / 0.5 sec on)

Sleep Timer Indicator

• ON while in sleep timer mode, OFF when sleep timer cancel or appliance operation pause.

Timer Indicator

• ON while in timer mode (on/off), OFF when timer mode is completed or canceled.

Comp. Running Incidator

• While in appliance operation, ON while in outdoor unit compressor running, OFF while in compressor off.

2) H/P Model

Operation Indicator

• ON while in appliance operation, OFF while in appliance pause.

• Flashing while in disconnection or short in Thermistor. (3 sec off / 0.5 sec on)

Sleep Timer Indicator

• ON while in sleep timer mode, OFF when sleep timer cancel or appliance operation pause.

Timer Indicator

• ON while in timer mode (on/off), OFF when timer mode is completed or canceled.

Defrost Indicator

• OFF except when hot start during heating mode operation or while in defrost control.

■ Cooling Mode Operation

• When the intake air temperature reaches 0.5°C below the setting temp, the compressor and the outdoor fan stop.

• When it reaches 0.5°C above the setting temp, they start to operate again.

Compressor ON Temp ➲ Setting Temp+0.5°C Compressor OFF Temp ➲ Setting Temp-0.5°C

• While in compressor running, operating with the airflow speed set by the remote control. While in compressor not running, operating with the low airflow speed regardless of the setting.

■ Healthy Dehumidification Mode

• When the dehumidification operation input by the remote control is received, the intake air temperature is detected and the setting temp is automatically set according to the intake air temperature.

26°C ≤ Intake Air Temp ➲ 25°C 24°C ≤ Intake Intake Air Temp<26°C ➲ Intake Air Temp-1°C 18°C ≤ Intake Intake Air Temp<24°C ➲ Intake Air Temp-0.5°C Intake Air Temp<18°C ➲ 18°C

- 17 -

LGE Internal Use Only

Operation Details

• While in compressor off, the indoor fan repeats low airflow speed and pause.

• While the intake air temp is between compressor on temp. and compressor off temp., 10-min dehumidifica-

tion operation and 4-min compressor off repeat. Compressor ON Temp. ➲ Setting Temp+0.5°C Compressor OFF Temp. ➲ Setting Temp-0.5°C

• In 10-min dehumidification operation, the indoor fan operates with the low airflow speed.

■ Heating Mode Operation

• When the intake air temp reaches +3°…above the setting temp, the compressor is turned off. When below the setting temp, the compressor is turned on. Compressor ON Temp. ➲ Setting Temp. Compressor OFF Temp. ➲ Setting Temp.+3°C

• While in compressor on, the indoor fan is off when the indoor pipe temp. is below 20°C, when above 28°C , it operates with the low or setting airflow speed. When the indoor pipe temp is between 20°C and 28°C, it operates with Super-Low(while in sleep mode, with the medium airflow speed).

• While in compressor off, the indoor fan is off when the indoor pipe temp is below 33°C, when above 35°C , it operates with the low airflow speed.

• If overloaded while in heating mode operation, in order to prevent the compressor from OLP operation, the outdoor fan is turned on/off according to the indoor pipe temp.

• While in defrost control, both of the indoor and outdoor fans are turned off.

■ Defrost Control

• While in heating mode operation in order to protect the evaporator pipe of the outdoor unit from freezing, reversed to cooling cycle to defrost the evaporator pipe of the outdoor unit.

• After 40 min heating mode operation, at 4 min interval, whether to carry out defrost control or not and the time of defrost control are determined according to the following conditions.

1) While in heating mode operation, the maximum of the indoor pipe temperature is measured and it is com-

pared with the present indoor pipe temperature to get the difference of the indoor pipe temperatures (=the maximum temperature of indoor pipe ? the present temperature of indoor pipe), according to which, whether to carry out defrost control or not is determined.

2) According to the need of defrost control shown above and the elapsed time of heating mode operation at that

moment, the defrost control time is determined.

3) When the determined time of defrost control is below 7 min, heating mode operation continues without carry-

ing out defrost control. According to the procedure stated above, the determination is made again. When the defrost control time is 7 min or longer, defrost control is then carried out.

• While in defrost control, the minimum temp of the indoor pipe is measured and it is compared with the present temp of the indoor pipe to get the difference of the indoor pipe temperatures (=the present temperature of the indoor pipe ? the minimum temperature of the indoor pipe). When the difference is 5°C or higher, defrost control is completed and heating mode operation is carried out.

• While in defrost control, if the defrost time determined before the start of defrost control is completed, defrost control stops and heating mode operation is carried out regardless of the above condition.

• When the indoor pipe temp is 42°C or above, defrost control is not carried out even if the condition is one of the defrost conditions above.

• While in defrost control, the compressor is on and the indoor fan, the outdoor fan, and the 4 way valve are off.

- 18 -

LGE Internal Use Only

Operation Details

■ Fuzzy Operation (C/O Model)

• According to the temperature set by Fuzzy rule, when the intake air temp is 0.5°C or more below the setting temp, the compressor is turned off. When 0.5°C or more above the setting temp, the compressor is turned on.

Compressor ON Temp ➲ Setting Temp + 0.5°C Compressor OFF Temp ➲ Setting Temp + 0.5°C

• At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to the intake air temp at that time.

26°C ≤ Intake Air Temp ➲ 25°C 24°C ≤ Intake Air Temp < 26°C ➲ Intake Air Temp + 1°C 22°C ≤ Intake Air Temp < 24°C ➲ Intake Air Temp + 0.5°C 18°C ≤ Intake Air Temp < 22°C ➲ Intake Air Temp Intake Air Temp<18°C ➲ 18°C

• When the Fuzzy key (Temperature Control key) is input after the initial setting temperature is selected, the Fuzzy key value and the intake air temperature at that time are compared to select the setting temperature automatically according to the Fuzzy rule.

• While in Fuzzy operation, the airflow speed of the indoor fan is automatically selected according to the temperature.

■ Fuzzy Operation (H/P Model)

• When any of operation mode is not selected like the moment of the power on or when 3 hrs has passed since the operation off, the operation mode is selected.

• When determining the operation mode, the compressor, the outdoor fan, and the 4 way valve are off and only the indoor fan is operated for 15 seconds. Then an operation mode is selected according to the intake air temp at that moment as follows.

24°C ≤ Inatake Air Temp ➲ Fuzzy Operation for Cooling 21°C ≤ Inatake Air Temp<24°C ➲ Fuzzy Operation for Dehumidification Inatake Air Temp<21°C ➲ Fuzzy Operation for Heating

• If any of the operation modes among cooling / dehumidification / heating mode operations is carried out for 10 sec or longer before Fuzzy operation, the mode before Fuzzy operation is operated.

1) Fuzzy Operation for Cooling

• According to the setting temperature selected by Fuzzy rule, when the intake air temp is 0.5°C or more below the setting temp, the compressor is turned off. When 0.5°C or more above the setting temp, the compressor is turned on.

Compressor ON Temp ➲ Setting Temp +0.5°C Compressor OFF Temp ➲ Setting Temp + 0.5°C

• At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to the intake air temp at that time.

26°C≤ Intake Air Temp ➲ 25°C 24°C≤ Intake Air Temp<26°C ➲ Intake Air Temp + 1°C 22°C≤ Intake Air Temp<24°C ➲ Intake Air Temp + 0.5°C 18°C≤ Intake Air Temp<22°C ➲ Intake Air Temp Intake Air Temp<18°C ➲ 18°C

• When the Fuzzy key (Temperature Control key) is input after the initial setting temperature is selected, the Fuzzy key value and the intake air temperature at that time are compared to select the setting temperature automatically according to the Fuzzy rule.

• While in Fuzzy operation, the airflow speed of the indoor fan is automatically selected according to the temperature.

- 19 -

LGE Internal Use Only

Operation Details

2) Fuzzy Operation for Dehumidification

• According to the setting temperature selected by Fuzzy rule, when the intake air temp is 0.5°C or more below the setting temp, the compressor is turned off. When 0.5°C or more above the setting temp, the compressor is turned on.

Compressor ON Temp ➲ Setting Temp + 0.5°C Compressor OFF Temp ➲ Setting Temp+0.5°C

• At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to the intake air temp at that time.

26°C ≤ Intake Air Temp ➲ 25°C 24°C ≤ Intake Air Temp<26°C ➲ Intake Air Temp+1°C 22°C ≤ Intake Air Temp<24°C ➲ Intake Air Temp+0.5°C 18°C ≤ Intake Air Temp<22°C ➲ Intake Air Temp Intake Air Temp<18°C ➲ 18°C

• When the Fuzzy key (Temperature Control key) is input after the initial setting temperature is selected, the Fuzzy key value and the intake air temperature at that time are compared to select the setting temperature automatically according to the Fuzzy rule.

• While in Fuzzy operation, the airflow speed of the indoor fan repeats the low airflow speed or pause as in dehumidification operation.

3) Fuzzy Operation for Heating

• According to the setting temperature selected by Fuzzy rule, when the intake air temp is 3°C or more above the setting temp, the compressor is turned off. When below the setting temp, the compressor is turned on.

Compressor ON Temp ➲ Setting Temp Compressor OFF Temp ➲ Setting Temp + 3°C

• At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to the intake air temp at that time.

20°C≤Intake Air Temp ➲ Intake Air Temp + 0.5°C Intake Air Temp<20°C ➲ 20°C

• When the Fuzzy key (Temperature Control key) is input after the initial setting temperature is selected, the Fuzzy key value and the intake air temperature at that time are compared to select the setting temperature automatically according to the Fuzzy rule.

• While in Fuzzy operation, the airflow speed of the indoor fan is set to the high or the medium according to the intake air temperature and the setting temperature.

■ Airflow Speed Selection

• The airflow speed of the indoor fan is set to high, medium, low, or chaos (auto) by the input of the airflow speed selection key on the remote control.

■ On-Timer Operation

• When the set time is reached after the time is input by the remote control, the appliance starts to operate.

• The timer LED is on when the on-timer is input. It is off when the time set by the timer is reached.

• If the appliance is operating at the time set by the timer, the operation continues.

- 20 -

LGE Internal Use Only

Operation Details

CLOSED

OPEN

< Cooling Mode >

CLOSED

OPEN

< Heating Mode >

■ Off-Timer Operation

• When the set time is reached after the time is input by the remote control, the appliance stops operating.

• The timer LED is on when the off-timer is input. It is off when the time set by the timer is reached.

• If the appliance is on pause at the time set by the timer, the pause continues.

■ Off-Timer ↔ On-Timer Operation

• When the set time is reached after the on/off time is input by the remote control, the on/off-timer operation is carried out according to the set time.

■ Sleep Timer Operation

• When the sleep time is reached after <1,2,3,4,5,6,7,0(cancel) hr> is input by the remote control while in appliance operation, the operation of the appliance stops.

• While the appliance is on pause, the sleep timer mode cannot be input.

• While in cooling mode operation, 30 min later since the start of the sleep timer, the setting temperature increases by 1°C. After another 30 min elapse, it increases by 1°C again.

• When the sleep timer mode is input while in cooling cycle mode, the airflow speed of the indoor fan is set to the

low.

• When the sleep timer mode is input while in heating cycle mode, the airflow speed of the indoor fan is set to the medium.

■ Chaos Swing Mode

• By the Chaos Swing key input, the louvers vane automatically operate with the Chaos Swing or they are fixed to the desired direction.

• While in Chaos Swing mode, the angles of cooling and heating cycle operations are different.

■ Jet Cool Mode Operation (C/O Model)

• If the Jet Cool key is input at any operation mode while in appliance operation, the Jet Cool mode operates.

• In the Jet Cool mode, the indoor fan is operated at super-high speed for 30 min at cooling mode operation.

• In the Jet Cool mode operation, the room temperature is controlled to the setting temperature, 18°C

• When the sleep timer mode is input while in the Jet Cool mode operation, the Jet Cool mode has the priority.

• During the JET COOL function at any moment, the A/C starts to blow the cool air with side louvers closed at

extremely high speed for 30 minutes setting the room temp. automatically to 18°C.

- 21 -

LGE Internal Use Only

Operation Details

■ Jet Cool Mode Operation (H/P Model)

• While in heating mode or Fuzzy operation, the Jet Cool key cannot be input. When it is input while in the other mode operation (cooling, dehumidification, ventilation), the Jet Cool mode is operated.

• In the Jet Cool mode, the indoor fan is operated at super-high speed for 60 min at cooling mode operation.

• In the Jet Cool mode operation, the room temperature is controlled to the setting temperature, 18°C.

• When the sleep timer mode is input while in the Jet Cool mode operation, the Jet Cool mode has the priority.

• During the JET HEAT function at any moment, the A/C starts to blow the hot air with side louvers closed at extremely high speed for 60 minutes setting the room temp. automatically to 30°C.

■ Forced Operation

• Operation procedures when the remote control can't be used.

• The operation will be started if the power button is pressed.

• If you want to stop operation, re-press the button.

Cooling Model

Operating mode Cooling Cooling Healthy Dehumidification Heating

Indoor FAN Speed

Setting Temperature

• While in forced operation, the key input by the remote control has no effect and the buzzer sounds 10 times to indicate the forced operation.

High High High High

22°C22°C23°C24°C

Room Temp. ≥ 24°C21°C ≤ Room Temp. < 24°C Room Temp. < 21°C

Heat pump Model

■ Test operation

•

During the TEST OPERATION, the unit operates in cooling mode at high speed fan, regardless of room temperature and resets in 18±1 minutes.

•

During test operation, if remote controller signal is received, the unit operates as remote controller sets. If you want to use this operation, open the front panel upward and Press the power button let it be pressed for about 3 seconds.

•

If you want to stop the operation, re-press the button.

■ Auto restart

•

In case the power comes on again after a power failure, Auto Restarting Operation is the function to operate procedures automatically to the previous operating conditions.

■ Remote Control Operation Mode

• When the remote control is selected by the slide switch on the main unit, the appliance operates according to the input by the remote control.

■ Protection of the evaporator pipe from frosting

• If the indoor pipe temp is below 0°C in 7 min. after the compressor operates without any pause while in cool- ing cycle operation mode, the compressor and the outdoor fan are turned off in order to protect the indoor evaporator pipe from frosting.

• When the indoor pipe temp is 7°C or higher after 3 min. pause of the compressor, the compressor and the outdoor fan is turned on according to the condition of the room temperature.

■ Buzzer Sounding Operation

• When the appliance-operation key is input by the remote control, the short "beep-beep-" sounds.

• When the appliance-pause key is input by the remote control, the long "beep—" sounds.

• When a key is input by the remote control while the slide switch on the main unit of the appliance is on the

forced operation position, the error sound "beep-beep-beep-beep-beep-" is made 10 times to indicate that the remote control signal cannot be received.

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LGE Internal Use Only

Lg Lau181cnw Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual