LG LG3ZMSS30, LG3ZMSS150 User Manual

Please read this manual carefully before operating your set and retain it for future reference.

General Multi-Inverter Type

P/NO : MFL68280204

SERVICE MANUAL

AIR CONDITIONER

- 2 -

LGE Internal Use Only

Air Conditioner Service Manual

TABLE OF CONTENTS

Part 1 General Information ..........................................................................................................3

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

2. Model Line Up................................................................................................................7

3. Nomenclature ..............................................................................................................10

Part 2 Functions & Controls......................................................................................................14

1. List of Functions & Accessory ..................................................................................15

2. Air Flow .......................................................................................................................17

3. Air Purifying.................................................................................................................19

4. Installation Functions.................................................................................................20

5. Reliability .....................................................................................................................21

6. Convenience Functions & Controls .........................................................................22

7. Special Function & KIT...............................................................................................29

Part 3 Basic Control ..................................................................................................................32

1. Normal operation ........................................................................................................33

2 Compressor control ....................................................................................................33

3. EEV( Electronic Expansion Valve) control ..............................................................33

4. Oil return control ........................................................................................................34

5. Defrost control ...........................................................................................................34

6. Protection control ......................................................................................................35

Part 4 Test Run..........................................................................................................................36

1. Check before Test Run .............................................................................................37

2. Test Run Flow chart ..................................................................................................38

3. Test Runing.................................................................................................................39

Part 5 Trouble Shooting Guide ...............................................................................................41

1. Self-diagnosis Function .....................................................................................42

2. Pump Down .........................................................................................................44

3. Evacuation...........................................................................................................45

4. Gas Charging ......................................................................................................46

5. Cycle Part ............................................................................................................47

6. Electronic Parts...................................................................................................48

Part 1 General Information

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LGE Internal Use Only

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

2. Model Line Up .....................................................................................................................7

3. Nomenclature....................................................................................................................10

Part 1 General Information

- 4 -

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.

n Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is classified by the follow-

ing indications.

This symbol indicates the possibility of death or serious injury.

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

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

Be sure to disconnect all remote electric power supplies before servicing. 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 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.

Be sure to provide the grounding when repairing the equipment in a humid or wet place, to avoid electrical shocks.

Be sure not to do.

Be sure to follow the instruction.

Dangerous Voltage

Be sure to provide grounding.

Part 1 General Information

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LGE Internal Use Only

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.

Use a vacuum pump or Inert (nitrogen) gas when doing leakage test or air purge. Do not compress air or Oxygen and Do not use Flammable gases. Otherwise, it may cause fire or explosion.

- There is the risk of death, injury, fire or explosion.

Do not turn on the breaker or power under condition that front panel, cabinet, top cover, control box cover are removed or opened.

- Otherwise, it may cause fire, electric shock, explosion or death.

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.

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

* Indicates color of panel – ART COOL : Gold(G), White Silver(H), Blue(B), Gallery(1)

ART COOL Mirror : Mirror(R), Silver(V), White(W)

Category

Chassis

Model names

Capacity, kW(kBtu/h Class)

2.1(7) 2.6 (9) 3.5 (12) 4.2(15) 5.3 (18) 7.03 (24) 10.6 (36)

Wall mounted

SB

AMNW07GDBB0

[LMN078HVT]

ASNW09GB1B0

[LSN090HSV4]

ASNW12GB1B0

[LSN120HSV4]

AMNW15GDBB0

[LMN158HVT]

SC

ASNW18GC2B0

[LSN180HSV4]

AMNW24GDCB0

[LMN248HVT]

ART COOL Mirror

SB

ASNW09GBRB0

[LAN090HSV4]

ASNW12GBRB0

[LAN120HSV4]

SC

ASNW18GCRB0

[LAN180HSV4]

ART COOL Gallery

SF

AMNW09GAF11

[LMAN097HVP]

AMNW12GAF11

[LMAN127HVP]

Ceiling cassette

4-way

TR

AMNW07GTRA0

[LMCN077HV]

AMNW09GTRA0

[LMCN097HV]

AMNW12GTRA0

[LMCN125HV]

TQ

AMNW18GTQA0

[LMCN185HV]

Ceiling concealed duct

Low static pressure

(Slim)

L1

AMNW09GL1A0

[LMDN096HV]

L2

AMNW12GL2A0

[LMDN126HV]

AMNW18GL2A0

[LMDN186HV]

High Static pressure

BG

AMNW24GBGA0

[LMHN240HV]

AMNW36GBGA0

[LMHN360HV]

Vertical AHU

NJ

AMNW24GNJA0

[LMVN240HV]

AMNW36GNJA0

[LMVN360HV]

Part 1 General Information

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LGE Internal Use Only

2.2 Outdoor units

Multiple Piping Type

Branch Distribution type

Model Name

A2UW18GFH0

[LMU180HHV]

A3UW24GFH0

[LMU240HHV]

A4UW30GFH0

[LMU300HHV]

No. of connectable indoor units (Min. ~ Max.)

2 ~ 2 2 ~ 3 2 ~ 4

Total capacity index of connectable indoor units

24 33 40

Power supply 208/230V, 1Ø, 60Hz

Chassis

Model Name

A5UW36GFH0[LMU360HHV] A6UW42GFH0[LMU420HHV]

No. of connectable indoor units (Min. ~ Max.)

2 ~ 5 2 ~ 6

Total capacity index of connectable indoor units

48 56

Power supply

208/230V, 1Ø, 60Hz

Chassis

Part 1 General Information

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LGE Internal Use Only

2.3 BD(Branch distributor) units

2.4 Branches

Branch

Type

No. of

BD

Units

Accessory

Model Name

Applicable

Model

Specifications

Gas Liquid

Y-

Branch

2

PMBL5620

MULTI FMAX

To BD unit Ø19.05 (3/4)

Ø19.05 (3/4)

To ODU Ø19.05 (3/4)

To BD unit Ø9.52 (3/8)

Ø9.52 (3/8)

To ODU Ø9.52 (3/8)

No. of connectable indoor units(Min. ~ Max.)

1 ~ 2 1 ~ 3 1 ~ 4 Model name PMBD3620 PMBD3630 PMBD3640 PMBD3641 Connectable indoor unit capacity kBtu/h 9 ~ 24 9 ~ 24 9 ~ 24 9 ~ 36

BD unit

Part 1 General Information

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LGE Internal Use Only

3. Nomenclature

3.1 Indoor Unit(Global)

AMN W G07 BDL0

Serial number

Indicates that this is multi system indoor unit using R410A

Model type

W : DC Inverter heat pump

Ex) 7,000 Btu/h Class

→ '07', 18,000 Btu/h Class → '18'

Cooling/heating capacity

Electrical rating

G : 1Φ, 208~230V, 60Hz

Chassis naem(Only Multi)

Indoor unit type(Only Multi) A : ART COOL Gallery D : Wall Mounted, ART COOL Mirror T : Ceiling cassette, B : Ceiling concealed duct N : Vertical AHU

Function

A : Basic, L : Plasma (Wall mounted) C : Plasma(ceiling cassette) Front panel design/color of ART COOL type R : Mirror, 1 : Gallery

Part 1 General Information

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LGE Internal Use Only

Code Type Code of Model Meaning

1 Production Center, A~Z L: Chang-won R22

Refrigerant A: Chang-won R410A

2 Product Type A~Z S: Split Type Air Conditioner

3 Cooling/Heating/Inverter A~Z C: Cooling Only H: Heat Pump X: C/O + E/Heater Z: H/P + E/Heater V: AC Inverter C/O N: AC Inverter H/P Q: DC Inverter C/O W: DC Inverter H/P

4, 5 Capacity 0~9 Cooling/Heating Capacity Ex. "09" ’ 9,000 Btu/h Class

6 Electric Range 1~9 1: 115V/60Hz A~Z 2: 220V/60Hz

3: 208-230V/60Hz 5: 200-220V/50Hz 6: 220-240V/50Hz 7: 110V, 50/60Hz

7 Chassis A~Z Name of Chassis

8 Look A~Z Look, Color (Artcool Model)

9 Function A~Z

10 Serial No. 1~9 LG Model Development Serial No.

12 - 345678910

Basic A Basic+4Way B Basic+Deodorizing Filter (Carbon filter) C Plasma+(A/changeove)+A/clean+2Way+Ion E Plasma+(A/changeove)+A/clean+4way+Ion+Lamp F Plasma+(A/changeove)+A/clean+Low A G Plasma+(A/changeove)+A/clean+4way+Low A H Plasma+(A/changeove)+A/clean L Plasma+(A/changeove)+A/clean+4way M Plasma+(A/changeove)+A/clean+PTC N Plasma+(A/changeove)+Autoclean+4way+PTC P Plasma+(A/changeove)+A/clean+4way+Low A+PTC Q Smart(Robot) Cleaning R Eco eye+Plasma+Allergy Filter+4way S Plasma+Allergy Filter+4way U Allergy Filter+4way V Allergy Filter+2way W Basic+Low Ambient Y Basic+(A/clean)+4way+Low A Z

A S - W 1 2 6 B M S 0

Part 1 General Information

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LGE Internal Use Only

A4U W G30 F H 0

Electrical rating

Indicates that this is multi system outdoor unit using R410A Ex) A4U : Connectable max. 4 indoor units

A6U : Connectable max. 6 indoor units

Model type

W : DC inverter heat pump

Ex) 24,000 Btu/h Class

→ ‘24’, 42,000 Btu/h Class → ‘42’

Cooling/heating capacity

G : 1Φ, 208~230V, 60Hz

Multi type

Function

A : Basic H : High Heat

F : Free joint multi type

Serial number

3.2 Outdoor Unit(Global)

Part 1 General Information

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LGE Internal Use Only

P M BD 36 2 0

Serial number

Number of connectable indoor units

Max. capacity of connectable indoor units “36” mean that 7~36kBtu/h Class Indoor unit connected to BD unit

BD : Branch distributor

M : Multi system outdoor unit

P : Parts

3.3 BD units(Global)

Part 2 Functions & Controls

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LGE Internal Use Only

Part 2 Functions & Controls

1. List of Functions & Accessory......................................................................................15

2. Air flow ............................................................................................................................17

2.1 Auto swing (left & right) ...............................................................................................17

2.2 Auto swing (up & down) ..............................................................................................17

2.3 Chaos swing (up/down)...............................................................................................17

2.4 Air flow step.................................................................................................................18

2.5 Chaos wind (auto wind)...............................................................................................18

2.6 Jet Cool Mode Operation ............................................................................................18

2.7 Swirl wind Swing .........................................................................................................18

3. Air purifying ....................................................................................................................19

3.1 PLASMA Air Purifying System.....................................................................................19

4. Installation Functions ....................................................................................................20

4.1 E.S.P. (External Static Pressure) Setting ....................................................................20

5. Reliability ........................................................................................................................21

5.1 Hot start.......................................................................................................................21

5.2 Self-diagnosis Function...............................................................................................21

5.3 Soft dry operation........................................................................................................21

6. Convenience Functions & Controls ............................................................................22

6.1 Cooling & heating Operations ....................................................................................22

6.2 Auto cleaning operation...............................................................................................23

6.3 Auto Operation (Artificial Intelligence).........................................................................23

6.4 Auto restart Opeartion.................................................................................................24

6.5 Child Lock Function.....................................................................................................25

6.6 Forced operation .........................................................................................................25

6.7 Group Control..............................................................................................................26

6.8 Sleep Timer Operation ................................................................................................27

6.9 Timer(On/Off) ..............................................................................................................27

6.10 Weekly Program........................................................................................................27

6.11 Two Thermistor Control .............................................................................................28

7. Special Function & KIT ..................................................................................................29

7.1 Low Ambient control....................................................................................................29

7.2 Space Control .............................................................................................................29

7.3 Auto Elevation Grille....................................................................................................29

7.4 Defrost Control(Heating) .............................................................................................31

Part 2 Functions & Controls

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LGE Internal Use Only

[Note] O : Applied, X : Not applied Accessory model name : Installed at field, ordered and purchased separately by the corresponding model name, supplied with separate package.

1. List of Functions & Accessory

1.1 List of Functions

• Indoor

Category Functions

Wall Mounted ART COOL Mirror

ART COOL

Gallery

Ceiling cassette

4-way

Ceiling concealed

duct (Low static

pressure)

Ceiling concealed

duct (High static

pressure)

Vertical Air Han-

dling Unit

Air flow

Air supply outlet

1 1 3 4 1 1 1

Airflow direction control (left & right)

Auto Auto Auto X X X X

Airflow direction control (up & down)

Auto Auto Auto Auto X X X

Auto swing (left & right)

O O O X X X X

Auto swing (up & down)

O O O O X X X

Airflow steps (fan/cool/heat)

6 / 6 / 6 6 / 6 / 6 5 / 5 / 5 4 / 5 / 4 3 / 3 / 3 3 / 3 / 3 3 / 3 / 3

Chaos wind(auto wind)

O O O O X X X

Jet cool/heat

O / O O / O O / O O / X X / X X / X X / X

Swirl wind

X X X O X X X

Air purify-

ing

Triple filter (Deodorizing)

X X X X X X X

Ventilation Kit

- - - PTVK430 X X X

Plasma air purifier

O O X PTPKQ0 X X X

Allergy Safe filter

X X X X X X X

Long-life prefilter (washable / anti-fung

O O O O O O X

Installation

Drain pump

X X X O O O X

E.S.P. control

X X X X O O O

Electric heater

X X X X X X

ANEH053B1(5kW)

ANEH103B2(10kW)

High ceiling operation

X X X O X X X

Auto Elevation Grille

X X X X X X X

Reliability

Hot start

O O O O O O O

Self diagnosis

O O O O O O O

Soft dry operation

O O O O O O O

Conven-

ience

Auto changeover

X X X X X X X

Auto cleaning

O O O X X X X

Auto operation(artificial intelligence)

O O O O O O O

Auto Restart

O O O O O O O

Child lock*

O O O O O O O

Forced operation

O O O O X X X

Group control*

O O O O O O O

Sleep mode

O O O O O X O

Timer(on/off)

O O O O O X O

Timer(weekly)*

O O O O O X O

Two thermistor control*

O O O O O O O

Individual

control

Standard Wired remote controller

PREMTB10U

Deluxe wired remote controller

X X X X X X X

Simple wired remote controller

PQRCVCL0Q / PQRCVCL0QW O O O

Simple wired remote controller(for hotel use)

X X X X X X X

Wireless remote controller*

O O O O PQWRHQ0FDB

Network

function

General central controller (Non LGAP

X X X X X X X

Network Solution(LGAP)

O O O O O O O

Dry contact

PQDSA(1)/PQDSB(1) / PQDSBC / PQDSBNGCM1

PI 485(for Indoor Unit)

X X X X X X X

Special

function kit

Zone controller

X X X X X X X

CTI(Communication transfer interface

X X X X X X X

Electronic thermostat

X X X X X X X

Others

Remote temperature sensor

X X X PQRSTA0

Group control wire

PZCWRCG3

Telecom shelter controller

X X X X X X X

Connector for water level sensor

O X O X X X X

Part 2 Functions & Controls

- 16 -

LGE Internal Use Only

[Note]

○ : Applied, × : Not applied

• Outdoor

1.2 List of Accessory

[Note] O : Applied, × : Not applied Accessory model name : Installed at field, ordered and purchased separately by the corresponding model name, supplied with separate package.

Category Functions

A2UW18GFH0[LMU180HHV] A3UW24GFH0[LMU240HHV] A4UW30GFH0[LMU300HHV] A5UW36GFH0[LMU360HHV] A6UW42GFH0[LMU420HHV]

Reliability

Defrost/Deicing O

High pressure switch X

Low pressure switch X

Phase protection X

Restart delay (3-minutes) O

Self diagnosis O

Soft start O

Test function X

Convenience

Night Silent Operation O

Wiring Error Check O

Peak Control O

Mode Lock O

Forced Cooling Operation (Outdoor Unit) O

Network function Network soluation(LGAP) O

Device

A2UW18GFH0[LMU180HHV] A3UW24GFH0[LMU240HHV] A4UW30GFH0[LMU300HHV]

A5UW36GFH0[LMU360HHV] A6UW42GFH0[LMU420HHV]

Central Controller

AC Ez (Simple Controller) PQCSZ250S0 PQCSZ250S0

AC Ez Touch PACEZA000 PACEZA000

AC Smart IV PACS4B000 PACS4B000

ACP IV PACP4B000 PACP4B000

AC Manager IV PACM4B000 PACM4B000

PI485 PMNFP14A0/PMNFP14A1 PMNFP14A0/PMNFP14A1

BNU (Building Network Unit)

LONWORKS Gateway PLNWKB000 PLNWKB000

BACnet Gateway PQNFB17C0 PQNFB17C0

Installation

Y branch X PMBL5620

Header branch X X

Air Guide X X

PDI (power distribution indicator) PQNUD1S00 PQNUD1S00

ODU Dry Contact X X

Low Ambient Kit O (Logical operation) O (Logical operation)

Part 2 Functions & Controls

- 17 -

LGE Internal Use Only

2. Air flow

2.1 Auto swing (left & right)

• 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 de-

sired 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.

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

RightLeft

110° ~ 120°

Close

110° ~ 120°

Open

CLOSED

Mode9

Mode8

Mode7

Mode6

Mode5

Mode4

Mode3

Mode2

110~120°

7~8°

OPEN

Part 2 Functions & Controls

- 18 -

LGE Internal Use Only

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

Part 2 Functions & Controls

- 19 -

LGE Internal Use Only

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

+

Part 2 Functions & Controls

- 20 -

LGE Internal Use Only

4.1 E.S.P. (External Static Pressure) Setting

4. Installation Functions

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.

• If you set ESP incorrectly, the air conditioner may malfunction.

• This setting must be carried out by a certificated-technician.

• Precaution shall be taken not to alter the E.S.P value corresponded to each air flow section.

• E.S.P value can be varied according to the products.

• In the case of going to the next air flow rate stage by pressing the fan-speed button during the setup of the E.S.P value, the E.S.P value of previous air flow rate will be maintained by remembering the E.S.P value prior to the shift.

TEMP

FAN

SPEED

OPER MODE

When pressing the button and button

1

simultaneously for more than 3 seconds, the system will be entered into the installer setting mode.

- After entering into the installer setting mode, select the E.S.P code value by pressing the button.

* E.S.P code value : 03

Select the desired air flow rate with

2

3

4

FAN

SPEED

the button. Whenever pressing

FAN

the button, [SLo

SPEED

Select the desired air flow rate value with the temperature up(▲), down(▼) button. * E.S.P value range : 0~255

E.S.P value will be indicated at the upper right section of the

-

display window.

When pressing the button, currently established E.S.P value will be set up.

→Lo→

Med→Hi→Po] will be indicated.

OPER

MODE

OPER MODE

When pressing the button and button simultaneously for

5

more than 3 seconds after the setting has been completed, the setting mode will be released.

- If there isn’t any button input for more than 25 seconds, the

installer setting mode will also be released.

OPER

MODE

Part 2 Functions & Controls

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LGE Internal Use Only

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 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.

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°C 18°C

Part 2 Functions & Controls

- 22 -

LGE Internal Use Only

6.1 Cooling & heating Operations

6.1.1 Cooling Mode

• 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 three minutes time delay.

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

6. Convenience Functions & Controls

6.1.2 Heating Mode

• 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 seconds.

• 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

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

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

• Compressor 2minutes delay

- After compressor off, the compressor can restart minimum 2 minutes later.

CST/Duct type indoor unit matched with

Universal Outdoor unit

CST/ Duct/CVT type indoor unit

matched with Single Outdoor unit/Multi

Outdoor unit/Multi V Outdoor unit

Thermo ON : +2 °C above setting temp. Thermo OFF : +4 °C above setting temp.

Thermo ON : Setting temp. Thermo OFF : +3 °C above setting temp.

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

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LGE Internal Use Only

6.3 Auto Operation (Artificial Intelligence)

• 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.

6.3.1 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.

6.2 Auto cleaning operation

• Function used to perform Self Cleaning to prevent the Unit from Fungus and bad odor.

• Used after the Cooling Operation before turning the unit off, clean the Evaporator and keep it dry for the next operation.

• The function is easy to operate as it is accessed through the Remote controller.

Unit

Operation

ON

OFF

Comp.

Indoor

Fan

ON

OFF

ON

OFF

Setting step

OFFL Low

Setting step

(Cooling Only)

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LGE Internal Use Only

6.3.2 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.

6.3.3 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.

Notes: The Temp. of Comp. Turn ON and OFF is different in heating mode and fuzzy operation for heating. Please,

refer 6.1

6.4 Auto restart Operation

• Whenever there is electricity failure to the unit, and after resumption of the power, unit will start in the same mode prior to the power failure. Memorized condition are on / off condition, operating mode (cooling/ heating), set temperature and fan speed. The unit will memorize the above conditions and start with same memorized condition.

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LGE Internal Use Only

6.5 Child Lock Function

6.6 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

23°C

24°C

Setting speed of

indoor fan

High speed

Operating Mode

Cooling

Healthy Dehumidification

Heating

It is the function to use preventing children or others from careless using.

FAN

SPEED

FAN

SPEED

FAN

SPEED

During the operation, when pressing the button and button for approx. 3 seconds, the ‘Child Lock’ Function can be used.

- At the time of initial setting of the ‘Child Lock’, the ‘CL’ Will be indicated approx. 3 seconds at the temperature Display section before resuming to the previous mode. After the setting of the ‘CL’, if another button is setup, the button can not be recognized as the ‘CL’ is indicated at the temperature display section for approx. 3 seconds.

1

If the ‘CL’ function is wanted to be used under the operation

standby state, press the

button and Button for approx.

3 seconds under the standby mode state and the system will

be the ‘CL’ state.

2

As for the releasing method, when pressing the Button and button for approx. 3 seconds, the ‘CL’ function can be released.

3

TEMP

FAN

SPEED

OPER MODE

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LGE Internal Use Only

6.7 Group Control

GND

12V

Signal wire

GND

12V

B Y R B Y R

MASTER SLAVE

Signal wire

GND

12V

Signal wire

1. When installing more than 2 units of air conditioner to one wired remote controller, please connect as the right figure.

• If it is not event communication indoor unit, set the unit as slave.

• Check for event communication through the product manual.

2. When installing more than 2 wired remote controllers to one air conditioner, please connect as the right picture.

• When installing more than 2 units of wired remote controller to one

air conditioner, set one wired remote controller as master and the others all as slaves, as shown in the right picture.

• You cannot control the group as shown in the right for some prod-

ucts.

•

Refer to the product manual for more detail.

When controlling multiple indoor units with event communication function with one remote controller, you must change the master/slave setting from the indoor unit.

- Indoor units, the master/slave configuration of the product after completion of indoor unit power ‘OFF’ and then ‘ON’ the

power after 1 minutes elapsed sign up.

- For ceiling type cassette and duct product group, change the switch setting of the indoor PCB.

- For wall-mount type and stand type product, change the master/slave setting with the wireless remote controller. (Refer to

wireless remote controller manual for detail)

h When installing 2 remote controllers to one indoor unit with event communication function, set the master/slave of the re-

mote controller. (Refer to remote controller master/slave selection) When controlling the group, some functions excluding basic operation setting, fan level Min/Mid/Max, remote controller lock setting and time setting may be limited.

<When simultaneously connecting

2 sets of wired remote controller>

• When controlling in groups, set the master/slaver of the remote controller. Refer to Installer setting section on how to set master/slave for more detail.

12345678 12345678

#3 switch OFF: Master

(Factory default setting)

#3 switch ON: Slave

Part 2 Functions & Controls

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LGE Internal Use Only

6.8 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.

6.9 Timer(On/Off)

6.9.1 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.

6.9.2 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.

6.10 Weekly Program

• If necessary, an operator can make an On/Off reservation of the product for a period of one week.

- On/Off schedule of operation for a period of ONE week.

• No need to turn the unit On/OFF manually during working days. On/Off time is scheduled in micom of the wired remote control.

Operation Time Table (Example)

Setting

Temp.

On

Off

Mon Tue Wed Thu Fri Sat Sun

25°C 25°C 25°C 25°C 25°C

09:00

12:00

08:00

17:00

09:00

12:00

08:00

12:00

09:00

12:00

OFF

Part 2 Functions & Controls

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LGE Internal Use Only

6.11 Two Thermistor Control

When pressing the button and button simultaneously for more than 3 seconds, the system will be entered into the installer setting mode.

- After entering into the installer setting mode, select the thermistor sensor setting code value by pressing the button.

* Thermistor sensor selection code value : 04

1

Select the desired setting value with the temperature up(▲), down(▼) button.

2

When pressing the button, currently established thermistor sensor location will be set up.

3

When pressing the button and button simultaneously for more than 3 seconds after the setting has been completed, the setting mode will be released.

- If there isn’t any button input for more than 25 seconds,

the installer setting mode will also be released.

4

OPER

MODE

OPER

MODE

Code value

*Setting value 01: Remote

controller 02: Indoor unit 03: 2TH

OPER MODE

Value

TEMP

FAN

SPEED

OPER

MODE

h The function of 2TH has different operation characteristics according to the product.

This is the function to select the temperature sensor to judge the room temperature.

Temperature sensor selection Function

01 Remote controller Operation in remote controller temperature sensor

02 Indoor unit Operation in indoor unit temperature sensor

03 2TH

Cooling

Operation of higher temperature by comparing indoor unit's and wired remote controller’s temperature. (There are products that operate at a lower temperature.)

Heating

Operation of lower temperature by comparing indoor unit's and wired remote controller's temperature.