LG Single A, ATNH243PLAD, LCN245HV, ATNH423MLAD, LCN425HV Svc Manual

Single "A" Air Conditioner

SVC MANUAL(General)

MODEL : Single "A"-Inverter Type

CAUTION

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

Internal Use Only

http://biz.lgservice.com

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LGE Internal Use Only

Air Conditioner Service Manual

CONTENTS

Part 1 General Information..........................................................................................................2

1. Safety Precautions........................................................................................................3

2. Model Line up................................................................................................................6

3. Nomenclature ................................................................................................................7

Part 2 Functions & Controls........................................................................................................8

1. List of Functions & Controls........................................................................................9

2. Air flow.........................................................................................................................11

3. Air purifying.................................................................................................................13

4. Installation Functions.................................................................................................16

5. Reliability .....................................................................................................................19

6. Convenience Functions & Controls .........................................................................20

Part 3 Control logic....................................................................................................................31

1. Compressor.................................................................................................................32

2. Step(frequency) control..............................................................................................34

3. Reversing valve operaton ..........................................................................................37

4. Discharge pipe control ...............................................................................................38

5. Input Current Control..................................................................................................39

6. Outdoor Fan Control...................................................................................................41

7. Defrost Control............................................................................................................43

8. LEV Control .................................................................................................................44

9. Oil restoration operation ............................................................................................50

10. Compressor warm-up control logic ........................................................................50

11. Heat sink control.......................................................................................................51

Part 4 Test Run ..........................................................................................................................52

1. Check before Test Run ...............................................................................................53

2. Test Run Flow chart ....................................................................................................54

Part 5 Trouble Shooting Guide ................................................................................................56

1. Self-diagnosis Function .............................................................................................57

2. Pump Down .................................................................................................................59

3. Evacuation...................................................................................................................60

4. Gas Charging...............................................................................................................61

5. Cycle Part.....................................................................................................................62

6. Electronic Parts...........................................................................................................63

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LGE Internal Use Only

1. Safety Precautions ............................................................................................................3

2. Model Line up .....................................................................................................................6

3. Nomenclature......................................................................................................................7

Part 1 General Information

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LGE Internal Use Only

1. Safety Precautions

1.1 Cautions in Repair

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.

Dangerous Voltage

Be sure to disconnect the power cable plug from the plug socket before disassembling the equipment for a repair.Internal components and circuit boards are at main potential when the equipment is connected to the power cables. This voltage is extremely dangerous and may cause death or severe injury if come in contact with it.

Do not touch the discharging refrigerant gas during the repair work. The discharging refrigerant gas.The refrigerant gas can cause frostbite.

Release the refrigerant gas completely at a well-ventilated place first. Otherwise, when the pipe is disconnected, refrigerant gas or refrigerating machine oil discharges and it Can cause injury.

When the refrigerant gas leaks during work, execute ventilation. If the refrigerant gas touches to a fire, poisonous gas generates. A case of leakage of the refrigerant and the closed room full with gas is dangerous because a shortage of oxygen occurs. Be sure to execute ventilation.

When removing the front panel or cabinet, execute short-circuit and discharge between high voltage capacitor terminals. If discharge is not executed, an electric shock is caused by high voltage resulted in a death or injury.

Do not turn the air-conditioner ON or OFF by plugging or unplugging the power plug. There is risk of fire or electrical shock.

Part 1 General Information

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LGE Internal Use Only

Do not turn on the breaker under condition that front panel and cabinet are removed.

Be sure to earth the air conditioner with an earthing conductor connected to the earthing terminal.

Conduct repair works after checking that the refrigerating cycle section has cooled down sufficiently. Otherwise, working on the unit, the hot refrigerating cycle section can cause burns.

Do not tilt the unit when removing panels. Otherwise, the water inside the unit can spill and wet floor.

Do not use the welder in a well-ventilated place. Using the welder in an enclosed room can cause oxygen deficiency.

Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.

Do not use a defective or underrated circuit breaker. Use the correctly rated breaker and fuse. Otherwise there is a risk of fire or electric shock.

Install the panel and the cover of control box securely. Otherwise there is risk of fire or electric shock due to dust, water etc.

Indoor/outdoor wiring connections must be secured tightly and the cable should be routed properly so that there is no force pulling the cable from the connection terminals. Improper or loose connections can cause heat generation or fire.

Do not touch, operate, or repaire the product with wet hands. Hoding the plug by hand when taking out. Otherwise there is risk of electric shock or fire.

Part 1 General Information

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LGE Internal Use Only

1.2 Inspections after Repair

Check to see if the parts are mounted correctly and wires are connected. Improper installation and connections can cause an electric shock or an injury.

Check the installation platform or frame has corroded. Corroded installation platform or frame can cause the unit to fall, resulting in injury.

Be sure to check the earth wire is correctly connected.

After the work has finished, be sure to do an insulation tset to check the resistance is 2[Mohm] or more between the charge section and the non-charge metal section (Earth position). If the resistance value is low, a disaster such as a leak or electric shock is caused at user’s side.

Check the drainage of the indoor unit after the repair. If drainage is faulty the water to enter the room and wet floor.

Check to see if the power cable plug is not dirty or loose. If the plug is dust or loose it can cause an electrical shock or fire.

Do not use a joined power cable or extension cable, or share the same power outlet with other electrical appliances. otherwise, it can cause an electrical shock, excessive heat generation or fire.

Do not insert hands or other objects through the air inlet or outlet while the product is operating. There are sharp and moving parts that could cause personal injury.

Do not block the inlet or outlet of air flow. It may cause product failure

Part 1 General Information

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LGE Internal Use Only

2. Model line up

2.1 Indoor units

2.2 Outdoor units

DC Inverter (1Ø)

DC Inverter

AUUW243D

[LUU245HV]

AUUW423D

[LUU425HV]

No. of connectable indoor units 1 Total capacity index of Btu/h 24,000 42,000 connectable indoor units kW 7.1 12.5 Power supply 1Ø, 208-230V, 60Hz

Chassis

24,000(7.1) 42,000(12.5)

ATNH243PLAD

[LCN245HV]

ATNH423MLAD

[LCN425HV]

APNH2433LAD

[LFN245HV]

APNH423TLAD

[LFN425HV]

Category Type

Model Name

Capacity, Btu/h(kW)

Chassis

4way

Ceiling

cassette

Floor Standing

TP

TM

P3

PT

* High Efficiency Indoor Units

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LGE Internal Use Only

Part 1 General Information

3. Nomenclature

• Global Model Name

3.1 Indoor unit s

3.2 Decoration panel(For ceiling cassette models)

3.3 Outdoor units

A T NH 2 4 3 P L AD

Serial Number

Functions

A : Basic C : Plasma Air Purifier E: Elevation grille

Look : Basic

Chassis Name Electrical Ratings

6:1 G: 1Ø 220V~240V, 50/60Hz 3: 1Ø 208V~230V, 60Hz

Ø,220V-240V,50Hz 8:3 Ø,380V-415V,50Hz

Capacity code

Model Type

C: Cooling Only H: Heat Pump

R410A Universal Indoor Unit

ATN : Universal Ceiling Cassette Type Indoor Unit ABN : Universal Ceiling Concealed Duct Type Indoor Unit AVN : Universal Ceiling & Floor Type Indoor Unit

A U UH 1 8 6A

Serial Number Electric Standard (Phase, Volts, Freq)

6:1 3: 1Ø 208V~230V, 60Hz

Ø,220V-240V,50Hz 8:3 Ø ,380V-415V,50Hz

Capacity code

Model Type

C : Cooling Only H : Heat Pump W: Inverter Heat Pump

R410A Universal Outdoor Unit

PT- H E A

Functions

A: Basic C:For Indoor Unit with Plasma Air Purifier.

Indoor Unit Chassis

Model Type

C : Cooling Only H : Heat Pump U: Universal

Decoration Panel of Ceiling Cassette Type Indoor Unit

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LGE Internal Use Only

Part 2 Functions & Controls

1. List of Functions & Controls ...........................................................................................9

2. Air flow ............................................................................................................................11

2.1 Auto swing (left & right) ...............................................................................................11

2.2 Auto swing (up & down) ..............................................................................................11

2.3 Chaos swing (up/down)...............................................................................................11

2.4 Air flow step.................................................................................................................12

2.5 Chaos wind (auto wind)...............................................................................................12

2.6 Jet Cool Mode Operation ............................................................................................12

2.7 Swirl wind Swing .........................................................................................................12

3. Air purifying ....................................................................................................................13

3.1 PLASMA Air Purifying System ....................................................................................13

4. Installation Functions ....................................................................................................16

4.1 Installer Setting -E.S.P.................................................................................................16

4.2 High Ceiling operation.................................................................................................17

5. Reliability ........................................................................................................................19

5.1 Hot start ......................................................................................................................19

5.2 Self-diagnosis Function...............................................................................................19

5.3 Soft dry operation........................................................................................................19

6. Convenience Functions & Controls .............................................................................20

6.1 Auto changeover operation ........................................................................................20

6.2 Child Lock Function.....................................................................................................24

6.3 Forced operation .........................................................................................................26

6.4 Timer(On/Off) ..............................................................................................................26

6.5 Two Thermistor Control ...............................................................................................27

6.6 Filter Sign clear ...........................................................................................................28

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LGE Internal Use Only

Part 2 Functions & Controls

1. List of Functions & Controls

Auto swing (left & right) Optional Auto swing (up & down) Optional Chaos swing (up & down) Optional Airflow steps (fan/cool/heat) Chaos wind (auto wind) Optional Jet cool (Power wind) Swirl wind Swing Optional Deodorizing filter Plasma air purifier Optional Pre-filter

(washable/anti-fungus) Drain pump Optional E.S.P. control Optional High ceiling operation Optional Hot start Self diagnosis Soft dry operation Auto changeover

Optional

Auto clean

Optional

Auto operation (artificial intelligence)

Auto restart operation

Child lock Optional Forced operation Group control

Sleep mode

Timer (on/off) Timer (weekly) Two thermistor control

Optional

Standard wired remote controller

Deluxe wired remote controller Optional Simple wired remote controller Wired remote Controller

(for hotel use) Wireless remote controller

(simple) Wireless LCD remote control Optional General central controller

(Non LGAP) Dry contact

Category Function Description Remark

Horizontal Airflow Direction control Vertical Airflow Direction control Vertical Airflow Direction control Indoor Fan speed Control Indoor Fan speed Control by chaos pattern Powerful cooling mode Distribute & stir the Air inside. Air filtration using Deodorizing filter Air filtration using plasma filter Air filtration using pre-filter

Drain water pump Changeable External Static Pressure Function to Control the Air Volume by Ceiling Height To prevent cold wind blow on heating mode start Error code displays Dehumidification Cooling mode is automatically changed to heating mode and

vice verse After cooling operation, this function makes the

evaporator dry Air volume & set temp. are automatically selected for comfort

on Cooling/Heating mode When power returns after a power failure, unit restarts in the

previous operating mode Protect the unit operation without approval Operation without remote controller Where several products are linked, one specific control

device can control a specific number of products. Air volume & set temp. are automatically changed for com-

fortable sleep Operation by Timer setting Operation by weekly reservation Option to control temperature by referring thermistor in the

Indoor unit or the LCD wired remote. Standard wired remote controller

Deluxe wired remote controller Simple wired remote controller Wired remote controller (for hotel use)

Wireless remote controller (simple)

Wireless LCD remote control General central controller

Dry contact

Airflow

Installation

Air purifying

Reliability

Convenience

Individual control

CAC network

function

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LGE Internal Use Only

Part 2 Functions & Controls

Network Solution (LGAP) PDI

(Power Distribution Indicator) PI 485 Zone control

Low ambient operation Space Control Optional Auto Elevation Optional Outdoor Normal Comp. control EEV control FAN control Oil Return Control Oil equalizing Sump Heating Protection Control Inverter protection Defrost / Deicing High pressure switch Optional Low pressure switch Phase protection Restart delay

Optional

(3-minutes) Self diagnosis Soft start Optional Test function

Category Function Description Remark

Network Solution (LGAP) PDI (power distribution indicator)

Network control using PI 485 (Internet) control the operation of the Air conditioning unit where each

zone For operation at low temp. Vanes angle can be controlled by pair. Grille is automatically down to clean Outdoor Control Compressor Control EEV Control FAN control Oil Return Control Oil equalizing Control Sump Heating Control Protection Control Inverter protection Condenser frost prevention Detect high pressure for safety Detect low pressure for safety Misconnection prevention for three phase For overload prevention

Error code displays Soft start for compressor Test operation

CAC network

function

Special Function

& KIT

Other

Functions

& Controls

Notes: The Exploded View part has the particular Function table for each model.

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LGE Internal Use Only

Part 2 Functions & Controls

2. Air flow

2.1 Auto swing (left & right)

RightLeft

110° ~ 120°

Open

Close

110° ~ 120°

Mode2

Mode3

Mode4

Mode5

Mode6

Mode7

Mode8

Mode9

OPEN

CLOSED

7~8°

110~120°

• By the horizontal airflow direction control key input, the left/right louver automatically operates with the auto swing or it

is fixed to the desired direction.

2.2 Auto swing (up & down)

• By the auto swing key input, the upper/lower vane automatically operates with the auto swing or it is fixed to the

desired direction.

2.3 Chaos swing (up/down)

• By the Chaos swing key input, the upper/lower vane automatically operates with the chaos swing or it is fixed to the

desired direction.

* Some Models are different with swing width and swing pattern.

NOTE: Some Models are different by swing width and swing pattern.

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LGE Internal Use Only

Part 2 Functions & Controls

2.4 Air flow step

• Indoor fan motor control have 6 steps.

• Air volume is controlled "SH", "H", "Med", Low" by remote controller.

• "LL" step is selected automatically in Hot start operation.

2.5 Chaos wind (auto wind)

• When "Auto" step selected and then operated, the high, medium, or low speed of the airflow mode is operated for

2~15 sec. randomly by the Chaos Simulation

2.6 Jet Cool Mode Operation

• 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 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.

• When the Jet Cool key is input, the upper/lower vanes are reset to those of the initial cooling mode and then operated

in order that the air outflow could reach further.

2.7 Swirl wind Swing

• It is the function for comfort cooling/heating operation.

• The diagonal two louvers are opened the more larger

than the other louvers. After one minute, it is opposite.

• Comparison of Air Flow Types

4-Open (conventional) Swirl Swing (New)

LL Very low, In heating mode

L Low M Med H High

SH Super high

Auto Chaos wind

Step Discription

Vane 4

Vane 2

Vane 1 Vane 3

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LGE Internal Use Only

Part 2 Functions & Controls

3.1 PLASMA Air Purifying System

The PLASMA Air Purifying System not only removes microscopic contaminants and dust, but also removes house mites, pollen, and pet fur to help prevent allergic diseases like asthma. This filter that can be used over and over again by simply washing with water.

3. Air purifying

Ionizer

Photo-Catalyst Coated Mesh

Dust particles

Odour

Dust electrode discharge

Odour molecule

Generating plasma

+

Polluted Air

Purified fresh Air

+4.8KV discharge

+

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LGE Internal Use Only

Part 2 Functions & Controls

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LGE Internal Use Only

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LGE Internal Use Only

4.1 Installer Setting -E.S.P.

4. Installation Functions

Function Code ESP valueESP step

Press button for 4 seconds to enter the installer setting mode until timer segment display “01:01”.

1

Repeat pressing button to select Function code 03.

2

Set ESP step by pressing button. (01: very low, 02: low, 03: medium, 04: high. 05: power)

3

Move to ESP setting by pressing button.

4

Press button to select ESP value(0~255).

5

What is an E.S.P function?

This is the function that decides the strength of the wind for each wind level and because this function is to make the installation easier, please do not use this function when using the remote controller.

If you set ESP incorrectly, the air conditioner may malfunction. This setting must be carried out by a certificated-technician. This function is used for only Duct product.

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LGE Internal Use Only

Part 2 Functions & Controls

Press button to save or release.

6

Press button to exit or the system will automatically exit after 25 seconds without any input.

7

❊ Weak and Power setting is not available for some products. ❊ Because the ESP value is already appropriately set when manufactured from the factory, it is recommended that you do

not change the ESP value.

4.2 High Ceiling operation

Function to Control the Air Volume by Ceiling Height Control of the air intensity has been made possible by employing a height-control algorithm for the interior fan.

According to the height of the installation, it provides variability of indoor fan motor rpm. If the height of installation is low then you can adjust low rpm of indoor fan motor. On the other hand if the height of the installation is high you can adjust high rpm of indoor fan motor. Selection of speed can be done by slide switch at the back of the LCD wired remote.

Installation on the normal-height ceiling

installation on the higher ceiling

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LGE Internal Use Only

Function Code Ceiling height

Press button for 4 seconds to enter the installer setting mode until timer segment display “01:01”.

1

Repeat pressing button to select Function code 05.

Ex) Setting Ceiling Height as 'Standard'.

2

Select ceiling height value by pressing button. (01:Low, 02:Standard, 03:High, 04:Super high)

3

Press button to save or release.

4

Press button to exit or system will automatically exit after 25 seconds without any input.

5

❊ Ceiling height setting is available only for some products. ❊ Ceiling height of ‘Super high’ function may not exist depending on the indoor unit. ❊ Refer to the product manual for more details.

Ceiling Height Level Description

01 Low Decrease the indoor airflow rate 1 step from standard level 02 Standard Set the indoor airflow rate as standard level 03 High Increase indoor airflow rate 1 step from standard level 04 Super high Increase indoor airflow rate 2 steps from standard level

Part 2 Functions & Controls

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LGE Internal Use Only

Part 2 Functions & Controls

5.1 Hot start

• When heating is started, the indoor fan is stopped or very slow to prevent the cold air carry out

• When the temp. of heat exchanger reach 30°C(model by model), indoor fan is started.

5.2 Self-diagnosis Function

• The air conditioner installed can self-diagnosed its error status and then transmits the result to the central control. Therefore, a rapid countermeasure against failure of the air conditioner allows easy management and increases the usage life of air conditioner.

• Refer to trouble shooting guide.

5.3 Soft dry operation

• 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.

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

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

tion and 4-min compressor off repeat.

Compressor ON Temp. ➔ Setting Temp+0.5°C Compressor OFF Temp. ➔ Setting Temp-0.5°C

• The indoor fan speed is automatically set to the low, so the shift of the indoor fan speed is impossible because of already being set to the best speed for Dry Operation by Micom Control.

5. Reliability

Intake air Temp. Setting Temp.

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°C18°C

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LGE Internal Use Only

Part 2 Functions & Controls

6. Convenience Functions & Controls

6.1 Auto changeover operation

• The air conditioner changes the operation mode automatically to keep indoor temperature.

• When room temperature vary over ±2°C with respect to setting temperature, air conditioner keeps the room tempera-

ture in ±2°C with respect to setting temperature by auto change mode.

SET Temp.

+0.5°C

-0.5°C

-2°C

+4°C +2°C

Cooling operation

Heating operation Cooling

operation

Cooling thermo off

Heating thermo off

Switching point

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LGE Internal Use Only

Part 2 Functions & Controls

■ Cooling & heating Opeattions

6.1.1 Cooling Mode

Setting Temp.

-0.5°C.

+0.5°C.

Comp. OFF

Comp. ON Comp. OFF Comp. ON

INV. Comp. Frequency

Constant Comp.

Low

High Low

Thermo. ON

Thermo OFF

High

• Operating frequency of compressor depends on the load condition, like the difference between the room temp. and the set temp., frequency restrictions.

• If the compressor operates at some frequency, the operating frequency of compressor cannot be changed within 30 seconds. ( not emergency conditions)

• Compressor turned off when

- intake air temperature is in between ±0.5°C of the setting temp. limit for three minutes continuously.

- intake air temperature reaches below 1.0°C of the temperature of setting temp..

• Compressors 3 minutes time delay.

- After compressor off, the compressor can restart minimum 3 minutes later.

- Compressor operating range is form 40% to 110% of rated condition.

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LGE Internal Use Only

Part 2 Functions & Controls

6.1.2 Heating Mode

+2°C.

+4°C.

Comp. OFF

Comp. ON Comp. OFF Comp. ON Comp. OFF

INV. Comp. Frequency

Constant Comp.

Low

High LowHigh Comp. OFF

Thermo ON

Thermo OFF

Setting

Temp.

• Operating frequency of compressor depend on the load condition, The difference between the room temp. and set

temp., frequency restrictions.

• If compressor operates at some frequency, the operating frequency of compressor cannot be changed within 30 sec-

onds.

• Condition of compressor turned off

- When intake air temperature reaches +4°C above the setting temperature.

• Condition of compressor turned on

- When intake air temperature reaches +2°C above the setting temperature.

* Condition of indoor fan turned off

- While in compressor on : indoor pipe temp. < 20°C (Option)

- While in compressor off : indoor pipe temp. < 30°C (Option)

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

• Compressor 3 minutes delay

- After compressor off, the compressor can restart minimum 3 minutes later.

NOTE: Some Models are different by temperature of thermo ON/OFF.

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LGE Internal Use Only

Part 2 Functions & Controls

* Some Models are different with temperature of indoor fan ON/OFF

■ Heating Mode Operation Details

The unit will operate according to the setting by the remote controller and the operation diagram is shown as following.

COMP

Outdoor fan

Indoor fan

4way valve

Setting Temperature

+2°C

(Thermo ON)

Setting Temperature

+4°C

(Thermo OFF)

Indoor unit Heat-Exchanger temperature

1min

Minimum

3min

1min

3min

Setting

fan

speed

Setting

fan

speed

Setting

fan

speed

ON

Low

LowLowLow

Low

Lo

OffOffOff

ON

OFF

Low fan during 10sec

A

B

Intake Air Temperature

• Compressor-off interval : - While the indoor Heat-Exchanger temperature is higher than 27°C, fan operates at low speed, when it becomes lower than 26°C fan stops.

- For eleminating latent heat-loss, fan operates at low speed for 10 seconds periodically.

(Option)36°C

(Option)34°C

(Option)29°C

(Option)27°C (Option)16°C

ON ON

Off Off

Low

1min1min

(Option)

20°C

(Option)

27°C

(Option)

33°C

Indoor unit

Heat-Exchanger

temperature

Setting fan

speed

Setting fan

spped

Compressor Outdoor fan

Indoor fan

4way Valve

ON

SET

FAN

ROOM

SET

FAN

ROOM

FAN

SPEED

ON

OFF

MODE

SET

FAN

ROOM

SET

FAN

ROOM

FAN

SPEED

ON

OFF

MODE

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LGE Internal Use Only

Part 2 Functions & Controls

6.2 Child Lock Function

This function is to prevent children or other people from using indoor.

• Press button.

• Repeat pressing button until the icon flash.

• When the button flashing, press button to set this function.

• When setting this function, icon

will be displayed whenever entering any operation except for Room temperature access. However, it is possible to control normally by wireless remote controller.

To release this setting, keep pressing button until icon flash and then enter button.

Touched the fan speed and high temperature setting keys simultaneously for 3 seconds. The display key will be locked with beep after 3 seconds.

1

During Child Lock Operation

➊ Whenever you Touch any key on Display panel, it will immediately display

“ ”, which means Display panel is Locked.

❷ All the key on the indoor unit Display panel will not work. ❸ But the key on the remote controller will work.

2

For releasing child lock Operation

Press the fan speed and high temperature setting keys simultaneously for 3 seconds again. The unit will respond with beep, Child Lock Operation will removed.

3

1. Ceiling cassette type

2-1. Floor Standing type_P3

Part 2 Functions & Controls

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LGE Internal Use Only

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.

2-2. Floor Standing type_PT

Press the fan speed button and High temperature setting buttons simultaneously for 3 seconds. The unit will respond with beep.

1

2

3

After 3 second,

it will shift

After 3 seconds,

it will shift

After pressing

the buttons

it will shift

immediately

After 3 seconds,

it will shift

During Child Lock Operation ➊ Whenever you press any Button, it will immediately display

“ ”, which means Button is Locked.

❷ All the Button on the indoor unit will not work. ❸ But the Button on the remote controller will work.

For releasing child lock Operation Press the fan speed button and High temperature setting buttons simultaneously for 3 seconds.

The unit will respond with beep, Child Lock Operation will removed.

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.

6.4 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 medi-

um.

6.5 Timer(On/Off)

6.5.1 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.

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

6.5.2 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.

Part 2 Functions & Controls

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LGE Internal Use Only

6.3 Forced operation

• To operate the appliance by force in case when the remote control is lost, the forced operation selection switch is on

the main unit of the appliance, and operate the appliance in the standard conditions.

• The operating condition is set according to the outdoor temp. and intake air temperature as follows.

• The unit select the last operation mode in 3 hours.

• Operating procedures when the remote control can't be used is as follows :

- The operation will be started if the ON/OFF button is pressed.

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

Indoor temp.

over 24°C

21~24°C

below 21°C

Setting temp.

22°C

Setting speed of

indoor fan

High speed

Operating Mode

Cooling

Healthy Dehumidification

Heating

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LGE Internal Use Only

Part 2 Functions & Controls

6.6 Two Thermistor Control

There may be a significant difference between temperature taken at the installed product indoor temperature. Two thermistor control provides option to control temperature by referring any of the two temperatures.

With help of the slide switch at the back of the wired remote controller, selection of the thermistor for controlling the unit can be One thermistor is in the Indoor unit & the one is in the LCD wired remote.

■ Two Thermistor System

Function Code Thermistor setting

Press button for 4 seconds to enter the installer setting mode until timer segment display “01:01”.

1

Set Thermistor mode by pressing button. (01: Remote Controller, 02: Indoor, 03: 2TH)

3

Press button to save or release.

4

Press button to exit or system will automatically exit after 25 seconds without any input.

5

Repeat pressing button to select Function code 04.

Ex) Setting Thermistor as '2TH'.

2

❊ Therefore system will use value that sensed from indoor unit or remote controller

Temperature sensor location Function

01 Remote controller Operation in remote controller Temperature sensor 02 Indoor unit Operation in indoor unit temperature sensor

03 2-Thermistor(2TH)

Operation in lower temperature after comparing the temperature between the indoor unit and remote controller

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