LG LSR120H Service Manual

Room Air ConditionerSVC MANUAL(Exploded View)

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

Internal Use Only

http://biz.lgservice.com

MODEL : LS-R126ARL/ABL/AEL/AEM

Contents

Details of 2002 LG Model Name ............................................................................................ 3

Functions ................................................................................................................................ 4

Product References .............................................................................................................. 7

Dimensions ............................................................................................................................. 8

Refrigeration Cycle Diagram ............................................................................................... 10

Wiring Diagram..................................................................................................................... 11

Operation Details ................................................................................................................. 12

Display Function .................................................................................................................. 19

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

Installation ............................................................................................................................ 20

Operation .............................................................................................................................. 31

Disassembly of the parts (Indoor Unit) .............................................................................. 33

2-way, 3-way Valve................................................................................................................ 36

Cycle Troubleshooting Guide.............................................................................................. 41

Electronic Parts Troubleshooting Guide............................................................................ 42

Electronic Control Device.................................................................................................... 49

Schematic Diagram .............................................................................................................. 52

Exploded View ...................................................................................................................... 57

- 2 -Copyright ©2007 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only

Details of 2002 LG Model Name


1 2 3 4 5 6 7 8 9

Code Type Code of Model Meaning

1,2 Type of Airconditioner A~Z LS: LG Split Type Airconditioner

3 Chassis A~Z Name of toll of UnitEx. LS-R S R Chassis

4,5 Capacity(Btu/h) 1~9 Cooling/Heating CapacityEx. "09" 9,000Btu/h

6 Electric Range 1~9 Electric Standard1 115V/60Hz 6 220~240V/50Hz2 220V/60Hz 7 110V, 50/60Hz3 208~230V/60Hz 8 380~415V/50Hz5 200~220V/50Hz 9 380~415V/60Hz

7 Serial No. 0~9A~Z

8 Cooling/Heating A~Z

9 LG/OEM Brand A~Z L: LG Brand M: 1st OEM BrandG: 2nd LG Brand N: 2nd OEM Brand

-

Basic A 0Plasma Filter B 1Auto Swing + Plasma Filter C 2Telephone + LED Display D 3Telephone + LCD Display E 4Auto Swing + Plasma Filter + Telephone + LCD F 5Low Ambient + Ambient/change G 6Plasma Filter + Low Ambient + Ambient/change H 7Internet J 8Auto Swing + Plasma Filter + Oxygen Generator K 9Auto Swing + Soft Start L ZAuto Swing + Star Rating M YAuto Swing + Star Rating + Plasma Filter N XAuto Swing + Soft Start + Star Rating P WAuto Swing + Soft Start + Star Rating 4 + Plasma Q VAuto Swing + Telephone + LCD R UAuto Swing + Telephone + LCD + Soft Start S T

C/O

C

A

D

G

K

H/P

H

B

E

J

L

E/H+C/O

X

5

7

-

-

E/H+H/P

Y

6

8

-

-

C/O

F

M

Q

-

-

H/P

R

P

S

-

-

C/O

V

W

1

3

H/P

N

Y

2

4

H/P

T

H/P

U

INDOOR

BASIC

BASIC

PLASMA

PLASMA

GOLD FIN

OUTDOOR

BASIC

GOLD FIN

GOLD FIN

BASIC

GOLD FIN

UNIT R22 HFC R22+AC INV. HFC+ACINV.

HFC+DCINV.


Functions

• Room temperature sensor. (THERMISTOR)

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

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

• Restarting is inhibited for approx. 3 minutes.

• High, Med, Low, CHAOS, JET COOL

--- Lights up in operation--- Lights up in Sleep Mode--- Lights up in Timer Mode

--- Lights up in Defrost Mode (for Heating Model)

OUTDOOR--- Lights up in compressor operation (for Cooling Model)

--- The function illustrates its dynamic mode by using a multiple lighting system.( )

--- Linghts up in Telephone Control operation.

• Intermittent operation of fan at low speed.

• The fan is switched to low(Cooling), med(Heating) speed.• The unit will be stopped after 1, 2, 3, 4, 5, 6, 7 hours.

• The fan is switched to intermittent or irregular operation• The fan speed is automatically switched from high to low speed.

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

Indoor Unit

Operation ON/OFF by Remote controller

Sensing the Room Temperature

Room temperature control

Starting Current Control

Time Delay Safety Control

Indoor Fan Speed Control

Operation indication Lamps (LED)

Soft Dry Operation Mode

• The function will be operated while in anyoperation mode with selecting the function.

• The function is to be stopped while it isoperating with selecting the function.

• Both the indoor and outdoor fan stops dur-

ing defrosting.

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

• Calling from outside, you can start the airconditioner to keep the room comfortable.Even though you went out with the air condi-tioner on, you can turn it off using the phoneoutside.

Sleep Mode Auto Control

Natural Air Control by CHAOS Logic

Airflow Direction Control

PLASMA

-4-

Defrost(Deice) control (Heating)

Hot-start Control (Heating)

PLASMA

Telephone Control Operation



Turn ON

1. Dial the number which is connected with the air conditioner.

2. After ringing 5 times.

3. You can hear the "Beep" sound (if the air conditioner is off), then press "0" "0" "7" "8" accordingly.

4. With the sound "Beep, Beep" the air conditioner starts on.

5. Hang up the phone.

Turn OFF


2. After ringing 5 times.

3. You can hear the "Beep Beep" sound (if the air conditioner is on), then press "0" "0" "7" "9" accordingly.

4. With the sound "Beep---" the air conditioner is turned off.


Telephone Control Operation(When using along with ARS telephone)

Turn ON


2. OGM guide is provided after signal sound rings four times and then "Beep"(sounds from telephone itself)sounds so that outside recording can be done.

3. Slowly press password "0" "0" "7" and "8" in order.

4. With the sound "Beep, Beep" the air conditioner starts on.


Turn OFF


2. OGM guide is provided after signal sound rings four times and then "Beep"(sounds from telephone itself)sounds so that outside recording can be done.

3. Slowly press password "0" "0" "7" and "9" in order.

4. With the sound "Beep---" the air conditioner is turned off.



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.( )

Fan Operation Mode

Horizontal Airflow Direction Control Button(Optional)

Room, Temperature Display

Setting the Time or Timer

PLASMA(Optional)

ON OFF

SET

PLASMA

CANCEL

Fan Speed Selection

(Low) (Med) (High) (CHAOS)

: (High:39°C Low:11°C)

: OFF, ON, OFF ON

: Cancel Sleep Mode, Timer ON or Timer OFF

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

: Fan Operates without cooling or heating.

Cooling Down to 18°CUp to 30°C

Heating Down to 16°CUp to 30°C


Product References

Model Name

Item Unit

Cooling CapacityBtu/h

Heating Capacity

Moisture Removal l/h

Power Source Ø, V, Hz

CoolingW

Heating

Running CoolingA

Current Heating

E.E.R. Cooling Btu/hW

C.O.P Heating

Refrigerant g

Airflow Direction Control (Up & Down)

Remocon Type

inch(mm)

Sleeping Operation

Drain Hose

Connecting Cable

Power Cord

Air Circulation

Noise Level

Input

m3/min

dB (A)±3

Indoor

Outdoor

Indoor

Outdoor

Indoor

Outdoor

Indoor

Outdoor

Indoor

Outdoor

Liquid

GasService Valve

Motor Output

Dimensions(W x H x D)

Net. Weight

W

mm

kg

LS-R126_Series

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

12,000

13,000

1.8

1Ø, 220-240V, 50Hz

8.6

26

38

48

1,200

1,210

5.5

5.5

10.0

3.15

12.9

25.5

900 x 285 x 156

770 x 540 x 245

8

35

910(R410A)

O

L.C.D Wireless

1/4" (6.35)

3/8" (9.52)

O

O

1.0mm2

1.0mm2


Installation plate

D

H

W

MODEL

DIM Unit

W mm 900

H mm 285

D mm 156

12K Btu Series

Dimensions

(1) Indoor Unit


(2) Outdoor Unit

W L2

L3

L1 D

H

L4

L5

Gas side(3-way valve)

Liquid side(2-way valve)

MODEL12K Btu Series

DIM unit

W mm 770

H mm 540

D mm 245

L1 mm 287

L2 mm 64

L3 mm 518

L4 mm 10

L5 mm 100


Refrigeration Cycle Diagram

INDOOR UNIT OUTDOOR UNIT

INDOOR UNIT OUTDOOR UNIT

HEATEXCHANGE(EVAPORATOR)

HEATEXCHANGE(EVAPORATOR)

HEATEXCHANGE(CONDENSER)

HEATEXCHANGE(CONDENSER)

COMPRESSOR

COMPRESSOR

ACCUMULATOR

GAS SIDE

GAS SIDE

VALVE

LIQUID SIDE

LIQUID SIDE

VALVE

CAPILLARY TUBE

CAPILLARY TUBE

CHECK VALVE(Heating Model only)

COOLING

HEATING

REVERSINGVALVE(Heating Model Only)

(1) Cooling Only Models

(2) Cooling & Heating Models

Wiring Diagram


PO

WE

R

BR

BR

BL

BK

RD

GN/

YLB

L

1(L)2(N

)3

4

MOTOR

CN-MOTOR

CN-TAB1

CN

-AC

/DC

CN

-AC

/DC

CN

-TH

THERMISTOR

STEPMOTOR

STEPMOTOR

H.V.ASM

RD AIRCLEAN(PLASMA)

SAFETY S/W1

SAFETY S/W2

BK

BKBK

BKBK

CN

-U/D

CN

-L/R

CN-DISP

DISPLAY PWB ASM

INDOOR WIRING DIAGRAM 3854A20142A

SW(FORCE)

RY-4WAY

RY-FAN

T/BLOCK

TO OUTDOOR UNIT

TRIAC

AC PWB ASM DC PWB ASM

OR

BK

BR

4

RY-COMP

FUSE 250V T2A3

YL

SH-CAPA

GN

/YL

BR

( BK

/Pla

ined

)G

N/Y

L

BL(

WH

/Rib

bed)

MOTOROR

RDBK

BK BKBK BK

BK BKBK BK

POW

ER

GN/YL

GN/YL

BR(B

K/Pl

aine

d)

BL(W

H/R

ibbe

d) BK

YL

SH-CAPA

T/BOARD

T-BLOCK

RY-4WAY

RY-FAN

CN-MOTOR

THERMISTOR

STEPMOTOR

CN

-AC

DC

1

CN

-AC

DC

2

CN-T

HCN

-U/D

CN-L

/RCN

-HVB

CN-1

2V

CN-DISP

DISPLAY PWB ASM.

P/No : 3854A20238H

CN-C

ONT

TRIAC

AC PWB ASM. DC PWB ASM.

CN-TAB

RY-COMP

TO OUTDOOR UNIT INDOOR WIRING DIAGRAM

4 31(L)

BR

BR BL BK RD

GN

/YL

2(N)3

4FUSE

250V T2A

STEPMOTOR

H.V.ASM.

S/W1

S/W2

AIRCLEAN(PLASMA)

(1) Indoor Unit

LS-R126ARL LS-R126ABL/AEL/AEM

COMPC S R

FANMOTOR

BR RD BL

BR BL BK(RD) YLGN/YL

BR BL BK RDGN/YL

BL BL

RE

VE

RS

ING

VA

LVE

RD BL YL

BL

BK(RD)

CAPACITOR

RD

BR

RD

BL

YL

TO INDOOR UNIT

OUTDOOR WIRING DIAGRAM3854A90001L

TERMINALBLOCK

H C F

PTC

1(L) 2(N) 3 4

(2) Outdoor Unit LS-R126ARL/ABL


Operation Details1. MAIN UNIT FUNCTION • DISPLAY1) 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°CCompressor OFF Temp Setting Temp-0.5°C

• While in compressor running, operating with the airflow speed set by the remote control. While in compressornot 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°C24°C ≤ Intake Intake Air Temp<26°C Intake Air Temp-1°C18°C ≤ Intake Intake Air Temp<24°C Intake Air Temp-0.5°CIntake Air Temp<18°C 18°C


• 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°CCompressor 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 , itoperates with the low or setting airflow speed. When the indoor pipe temp is between 20°C and 28°C, it oper-ates 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 , itoperates with the low airflow speed.

• If overloaded while in heating mode operation, in order to prevent the compressor from OLP operation, theoutdoor 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 timeof 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 (=themaximum temperature of indoor pipe ? the present temperature of indoor pipe), according to which, whetherto 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 thatmoment, 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 thedefrost 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 presenttemp of the indoor pipe to get the difference of the indoor pipe temperatures (=the present temperature of theindoor pipe ? the minimum temperature of the indoor pipe). When the difference is 5°C or higher, defrost con-trol 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, defrostcontrol 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 ofthe 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.


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°CCompressor OFF Temp Setting Temp + 0.5°C

• At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to theintake air temp at that time.26°C ≤ Intake Air Temp 25°C24°C ≤ Intake Air Temp < 26°C Intake Air Temp + 1°C22°C ≤ Intake Air Temp < 24°C Intake Air Temp + 0.5°C18°C ≤ Intake Air Temp < 22°C Intake Air TempIntake Air Temp<18°C 18°C

• When the Fuzzy key (Temperature Control key) is input after the initial setting temperature is selected, theFuzzy key value and the intake air temperature at that time are compared to select the setting temperatureautomatically 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 airtemp at that moment as follows.24°C ≤ Inatake Air Temp Fuzzy Operation for Cooling21°C ≤ Inatake Air Temp<24°C Fuzzy Operation for DehumidificationInatake Air Temp<21°C Fuzzy Operation for Heating

• If any of the operation modes among cooling / dehumidification / heating mode operations is carried out for 10sec 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 belowthe setting temp, the compressor is turned off. When 0.5°C or more above the setting temp, the compressoris turned on.Compressor ON Temp Setting Temp +0.5°CCompressor OFF Temp Setting Temp + 0.5°C

• At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to theintake air temp at that time.26°C≤ Intake Air Temp 25°C24°C≤ Intake Air Temp<26°C Intake Air Temp + 1°C22°C≤ Intake Air Temp<24°C Intake Air Temp + 0.5°C18°C≤ Intake Air Temp<22°C Intake Air TempIntake Air Temp<18°C 18°C


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


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 belowthe setting temp, the compressor is turned off. When 0.5°C or more above the setting temp, the compressoris turned on.Compressor ON Temp Setting Temp + 0.5°CCompressor OFF Temp Setting Temp+0.5°C

• At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to theintake air temp at that time.26°C ≤ Intake Air Temp 25°C24°C ≤ Intake Air Temp<26°C Intake Air Temp+1°C22°C ≤ Intake Air Temp<24°C Intake Air Temp+0.5°C18°C ≤ Intake Air Temp<22°C Intake Air TempIntake Air Temp<18°C 18°C


• While in Fuzzy operation, the airflow speed of the indoor fan repeats the low airflow speed or pause as indehumidification 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 abovethe setting temp, the compressor is turned off. When below the setting temp, the compressor is turned on.Compressor ON Temp Setting TempCompressor OFF Temp Setting Temp + 3°C

• At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to theintake air temp at that time.20°C≤Intake Air Temp Intake Air Temp + 0.5°CIntake Air Temp<20°C 20°C


• While in Fuzzy operation, the airflow speed of the indoor fan is set to the high or the medium according to theintake 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.


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 appli-

ance 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 upper/lower vane automatically operates 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.

Chaos Natural Wind Mode• When the Chaos Natural Wind mode is selected and then operated, the high, medium, or low speed of the air-

flow mode is operated for 2~15 sec. randomly by the Chaos Simulation.

CLOSED

OPEN

< Cooling Mode >

7°

CLOSED

OPEN

< Heating Mode >

7°


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.• 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.

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 othermode 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.

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.

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

Test operation• During the TEST OPERATION, the unit operates in cooling mode at high speed fan, regardless of room tem-

perature 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 forabout 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.

Air Cleaner Operation• When an air cleaner function is selected during Air Conditioner operation

- Plasma air cleaner function will be operated while in any operation mode with selecting the function.- The function is to be stopped while it is operating with selecting the function.

• When an air cleaner function is selected during operation off- The function will be only operated.

• When inlet grille of air conditioner is opened during plasma operation, High Voltage Generator(H.V.B) is to bestopped. When inlet grille of air conditioner is closed during plasma operation, High Voltage Generator(H.V.B)will be operated again.

Heat pump ModelCooling Model

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

Operating mode Cooling Cooling Healthy Dehumidification Heating

Indoor FAN Speed High High High High

Setting Temperature 22°C 22°C 23°C 24°C


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 indoorevaporator pipe from frosting.

• When the indoor pipe temp is 7°C or higher after 3 min. pause of the compressor, the compressor and theoutdoor 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 theremote control signal cannot be received.


Calling from outside, you can start the air conditioner to keep the room comfortable.

Even though you went out with the air conditioner on, you can turn it off using the phone outside.

• This product works after telephone rings 5 times.

• If internal user picks up the phone before 5 rings. Telephone control function does not work.

• If user doesn't push the telephone button 25 seconds after beep, Telephone control function doesn't work.

• If it is connected to key phone, it cannot be worked.

When using along with ARS telephone

• The numbers of response bell should be adjusted to four times if pressing "Out - off - office" button or takingother action for automatic response.

• The recording time of OGM (Outgoing Message) should be less than approximately 15 seconds.

• If it is connected to key phone, it cannot be worked.


Display Function

Self-diagnosis Function

3sec 3sec 3sec

(once)

ErrorCode

1

Error Display LED(Indoor body operation LED)

Error contents

• Indoor room temperaturethermistor open/short

• Indoor pipe temperaturethermistor open/short.

• Indoor Thermistor assembly check

SVC check point

1. Heating Model 2. Cooling Model

• Cooling, Soft Dry, Fan, Heating • Cooling, Soft Dry, Fan

• Sleep Mode • Sleep Mode

• Timer Mode • Timer Mode

• Hot-start, Defrost

• PLASMA Mode • PLASMA Mode

Operation Indicator

Timer Indicator

Sleep Timer Indicator

Defrost Indicator

PLASMA Indicator

Operation Indicator

Timer Indicator

Sleep Timer Indicator

Compressor Indicator

PLASMA IndicatorPLASMA PLASMA

OUTDOOR


1) Selection of the best location1. Indoor unit

• Do not have any heat or steam near the unit.• Select a place where there are no obstacles in front of

the unit.• Make sure that condensation drainage can be conve-

niently routed away.Do not install near a doorway.

• Ensure that the space around the left and right of theunit is more than "A". The unit should be installed ashigh on the wall as possible, allowing a minimum of"B" from ceiling.

• Use a stud finder to locate studs to prevent unneces-sary damage to the wall.

2. Outdoor unit

• If an awning is built over the unit to prevent direct sun-light or rain exposure, make sure that heat radiationfrom the condenser is not restricted.

• Ensure that the space around the back and sides ismore than 10cm. The front of the unit should havemore than 70cm of space.

• Do not place animals and plants in the path of thewarm air.

• Take the air conditioner weight into account and selecta place where noise and vibration are minimum.

• Select a place so that the warm air and noise from theair conditioner do not disturb neighbors.

2) Piping length and elevation

Installation

1. Installation of indoor, Outdoor unit

More than "A"

More than "B"

More than 2.3m More than "B"

More than 10cm More than 10cm

More than 60cm

More than 60cm

More than 70cm

Install the indoor unit on the wall where the heightfrom the floors more than 2.3 meters.

CAUTION

• Capacity is based on standard length and maximumallowance length is on the basis of reliability.

• Oil trap should be installed every 5~7 meters.

CAUTION

GradeClearance(cm)

A B7K~28K 10 530K~38K 30 12

Pipe SizeCapacity(Btu/h) GAS LIQUID

Max. LengthA (m)

AdditionalRefrigerant

(g/m)

Max.Elevation

B (m)

StandardLength

(m)

7k~14k3/8"(Ø9.52) 1/4"(Ø6.35) 4 or 7.5 7 15 20

1/2"(Ø12.7) 1/4"(Ø6.35) 4 or 7.5 7 15 20

1/2"(Ø12.7) 1/4"(Ø6.35) 4 or 7.5 15 30 20

18k~28k 5/8"(Ø15.88) 1/4"(Ø6.35) 4 or 7.5 15 30 20

5/8"(Ø15.88) 3/8"(Ø9.52) 4 or 7.5 15 30 30

30k~38k5/8"(Ø15.88) 3/8"(Ø9.52) 7.5 15 30 30

3/4"(Ø19.05) 3/8"(Ø9.52) 7.5 15 30 50

If case more than 5m

Outdoor unit

Indoor unit

A

B Outdoor unit

Indoor unit

A

B

AOil trap

Outdoor unit

Indoor unitB

I


3) How to fix installation plateThe wall you select should be strong and solid enoughto prevent vibration

1. Mount the installation plate on the wall with fourtype A screws. If mounting the unit on a concretewall, use anchor bolts.• Mount the installation plate horizontally by aligning

the centerline using a level.

2. Measure the wall and mark the centerline. It isalso important to use caution concerning thelocation of the installation plate-routing of thewiring to power outlets is through the walls typi-cally. Drilling the hole through the wall for pipingconnections must be done safely.

4) Drill a hole in the wall• Drill the piping hole with a ø70mm hole core drill. Drill

the piping hole at either the right or the left with thehole slightly slanted to the outdoor side.

5) Installation instructions of telephone control(Optional)

• Open the Front Grille.• Pass Telephone Control Cord Wire through the hole

which the power cord goes through.• Connect Telephone Control Cord Wire to the phone

jack of telephone PCB of Control Box.• Fix Telephone Control Cord Wire inside Control box

so as not to disconnect.• Close the Front Grille.

Installation Plate

Type "A" screw

5-7m

m

(3/1

6"~

5/16

")

Indoor

WALL

Outdoor

Answering telephone / Normal telephone(Not packed in the box)

Adaptor(Not packed in

the box)

Telephone ControlCord Wire

(Packed in the box)

PhoneConductor

Installation plate

Ø70mm

Left rear piping Right rear piping

C

D B

AØ70mm

Ø70mmLeft rear piping Right rear piping

C E A

BD

Installation plateInstallation plate

A B C D

SJ 90 20 80 20

SL, SK 45 40 80 20

SQ 75 12 80 12

SR 0 40 20 40

ST 105 0 210 0

CHASSIS(Grade)

Distance (mm)

A B C D E

SM 180 115 - 115 50

SN 180 115 195 115 -

CHASSIS(Grade)

Distance (mm)


2. Flaring Work and Connection of Piping

1) Flaring workMain cause for refrigerant leakage is due to defect inthe flaring work. Carry out correct flaring work using thefollowing procedure.

1. Cut the pipes and the cable.• Use the piping kit accessory or pipes purchased locally.• Measure the distance between the indoor and the

outdoor unit.• Cut the pipes a little longer than the measured

distance.• Cut the cable 1.5m longer than the pipe length.

2. Burr removal• Completely remove all burrs from the cut cross sec-

tion of pipe/tube.• Put the end of the copper tube/pipe in a downward

direction as you remove burrs in order to avoid drop-ping burrs into the tubing.

3. Putting nut on• Remove flare nuts attached to indoor and outdoor

unit, then put them on pipe/tube having completedburr removal.(not possible to put them on after flaring work)

4. Flaring work• Firmly hold copper pipe in a die in the dimension

shown in the table above.

• Carry out flaring work using flaring tool as shownbelow.

5. Check• Compare the flared work with figure below.• If flare is noted to be defective, cut off the flared sec-

tion and re-flare it.

Copperpipe 90° Slanted Uneven Rough

Bar

Copper pipe

Clamp handleRed arrow mark

Cone

Yoke

Handle

Bar"A"

Inclined

Inside is shiny without scratches

Smooth all round

Even lengthall round

Surfacedamaged

Cracked Uneventhickness

= Improper flaring =

Pipe

Reamer

Point down

Flare nut

Copper tube

mm inch mmØ6.35 1/4 0~0.5Ø9.52 3/8 0~0.5Ø12.7 1/2 0~0.5Ø15.88 5/8 0~1.0Ø19.05 3/4 1.0~1.3

Outside diameter


2) Connection of piping Indoor• Preparing the indoor unit's piping and drain hose for

installation through the wall.• Remove the plastic tubing retainer(see illustration

below) and pull the tubing and drain hose away fromchassis.

• Replace the plastic tubing holder in the original posi-tion.

1. Route the indoor tubing and the drain hose in thedirection of rear right.

2. Insert the connecting cable into the indoor unitfrom the outdoor unit through the piping hole.

• Do not connect the cable to the indoor unit.• Make a small loop with the cable for easy

connection later.

3. Tape the tubing, drain hose, and the connectingcable. Be sure that the drain hose is located at thelowest side of the bundle. Locating at the upperside can cause drain pan to overflow inside theunit.

NOTE: If the drain hose is routed inside the room, insulate the hose with an insulation material* so thatdripping from "sweating"(condensation) will not damagefurniture or floors.*Foamed polyethylene or equivalent is recommended.

4. Indoor unit installation• Hook the indoor unit onto the upper portion of the

installation plate.(Engage the two hooks of the reartop of the indoor unit with the upper edge of the instal-lation plate.) Ensure that the hooks are properly seat-ed on the installation plate by moving it left and right.

Press the lower left and right sides of the unit againstthe installation plate until the hooks engage into theirslots(clicking sound).

4. Connecting the pipings to the indoor unit and drainhose to drain pipe.• Align the center of the pipes and sufficiently tighten

the flare nut by hand.

For right rear piping

CAUTIONWhen install, make surethat the remaining partsmust be removed clearlyso as not to damage thepiping and drain hose,especially power cordand connecting cable.

Tubing holder

Connecting cable

Loop

Gas sidepiping

Liquid sidepipingDrain hose

Drain hose

Connectingcable

Indoor unit tubing Flare nut Pipes

Drain hose


• Tighten the flare nut with a wrench.

• When extending the drain hose at the indoor unit,install the drain pipe.

5. Wrap the insulation material around the connectingportion.• Overlap the connection pipe insulation material and

the indoor unit pipe insulation material. Bind themtogether with vinyl tape so that there is no gap.

• Wrap the area which accommodates the rear pipinghousing section with vinyl tape.

• Bundle the piping and drain hose together by wrap-ping them with vinyl tape for enough to cover wherethey fit into the rear piping housing section.

1. Route the indoor tubing and the drain hose to therequired piping hole position.

2. Insert the piping, drain hose, and the connectingcable into the piping hole.

For left rear piping

mm inch kg.mØ6.35 1/4 1.8Ø9.52 3/8 4.2Ø12.7 1/2 5.5Ø15.88 5/8 6.6Ø19.05 3/4 6.6

Outside diameter Torque

Wrench

Indoor unit tubing

Open-end wrench (fixed)

Connection pipe

Flare nut

Vinyl tape(narrow)Adhesive

Drain pipe

Indoor unit drain hose

Plastic bands Insulation material

Vinyl tape(narrow)

Connectionpipe

Connecting cable

Vinyl tape(wide)

Wrap with vinyl tape

Indoor unit pipe

Pipe


Drain hose

Pipe

Vinyl tape(wide)

Drain pipe

Connecting cable


3. Insert the connecting cable into the indoor unit.• Don't connect the cable to the indoor unit.• Make a small loop with the cable for easy connection

later.

4. Tape the drain hose and the connecting cable.• Connecting cable

5. Indoor unit installation• Hang the indoor unit from the hooks at the top of the

installation plate.• Insert the spacer etc. between the indoor unit and the

installation plate and separate the bottom of theindoor unit from the wall.

6. Connecting the pipings to the indoor unit and thedrain hose to drain pipe.• Align the center of the pipes and sufficiently tighten

the flare nut by hand.

• Tighten the flare nut with a wrench.

• When extending the drain hose at the indoor unit,install the drain pipe.

7. Wrap the insulation material around the con-necting portion.

• Overlap the connection pipe heat insulation and theindoor unit pipe heat insulation material. Bind themtogether with vinyl tape so that there is no gap.

• Wrap the area which accommodates the rear pipinghousing section with vinyl tape.

mm inch kg.mØ6.35 1/4 1.8Ø9.52 3/8 4.2Ø12.7 1/2 5.5Ø15.88 5/8 6.6Ø19.05 3/4 6.6


Vinyl tapeAdhesive

Drain hose

Indoor unit drain hose

(narrow)

Plastic bands Insulation material

Vinyl tape(narrow)

Connectionpipe

Connecting cable

Indoor unit piping

Pipe

Vinyl tape(wide)


Installation plate

Spacer

Indoor unit

8cm

Indoor unit tubing Flare nut Pipes

Wrench

Indoor unit tubing

Connection pipe

Flare nut

Open-end wrench (fixed)


• Bundle the piping and drain hose together by wrap-ping them with cloth tape over the range within whichthey fit into the rear piping housing section.

8. Reroute the pipings and the drain hose across theback of the chassis.

9. Set the pipings and the drain hose to the back ofthe chassis with the tubing holder.• Hook the edge of tubing holder to tap on chassis and

push the bottom of tubing holder to be engaged at thebottom of chassis.

10. Indoor unit installation • Remove the spacer.• Ensure that the hooks are properly seated on the

installation plate by moving it left and right.

Press the lower left and right sides of the unit againstthe installation plate until the hooks engage into theirslots(clicking sound).

3) Connection of the pipes-Outdoor

1. Align the center of the pipings and sufficientlytighten the flare nut by hand.

2. Finally, tighten the flare nut with torque wrenchuntil the wrench clicks.• When tightening the flare nut with torque wrench,

ensure the direction for tightening follows the arrow onthe wrench.

mm inch kg.mØ6.35 1/4 1.8Ø9.52 3/8 4.2Ø12.7 1/2 5.5Ø15.88 5/8 6.6Ø19.05 3/4 6.6


Drain hoseVinyl tape(narrow)

Pipe

Wrap with vinyl tape(wide)

Piping forpassage throughpiping hole

Outdoor unit Liquid side piping(Smaller diameter)

Gas sidepiping(Biggerdiameter)

Torque wrench

Outdoor unit Gas side piping(Bigger diameter)

Liquid sidepiping(Smallerdiameter)

Torque wrench

Tubing holder

Drain hose

Connectingcable


3. Connecting The Cable Between Indoor Unit and Outdoor Unit

1) Connect the cable to the Indoor unit.• Connect the cable to the indoor unit by connecting the wires to the terminals on the control board in

dividually according to the outdoor unit connection. (Ensure that the color of the wires of the outdoor unit andthe terminal No. are the same as those of the indoor unit.)The earth wire should be longer than the common wires.

Air Conditioner

Main power source

If a power plug is not to be used, provide a circuit breakerbetween power source and the unit as shown below.

Circuit BreakerUse a circuitbreaker or timedelay fuse.

CAUTION

CAUTIONThe power cord connected to the "A" unit should becomplied with the following specifications(Type "B" approved by HAR or SAA).

7k~14k 18k 24k~28k 30k, 32k 36k, 38k

1.0 1.5 2.5 2.5 5.5

Unit(A) Indoor Indoor Indoor Outdoor Outdoor

Cable Type(B) H05VV-F H05VV-F H05VV-F H05RN-F H05RN-F

NORMAL CROSS-SECTIONAL AREA

Grade

30k, 32k 36k, 38k

0.75 0.75

Cable Type(B) H07RN-F H07RN-F

NORMAL CROSS-SECTIONAL AREA

Grade

(mm2)

(mm2)

(mm2)

The power connecting cable connected to the indoorand outdoor unit should be complied with the followingspecifications(Type "B" approved by HAR or SAA).

NORMALCROSS-SECTIONALAREA 0.75mm2

• The above circuit diagram is subject to change with-out notice.

• Be sure to connect wires according to the wiring dia-gram.

• Connect the wires firmly, so that not to be pulled outeasily.

• Connect the wires according to color codes by refer-ring the wiring diagram.

CAUTION

• When installing, refer to the circuit diagram on theControl Box of Indoor Unit.

• When installing, refer to the wiring diagram on theControl Cover Inside Outdoor Unit.

5k~9k 12k~14k 18k 24k~28k

0.75 1.0 1.5 2.5

Cable Type(B) H07RN-F H07RN-F H07RN-F H07RN-F

NORMALCROSS

-SECTIONALAREA

Grade


2) Connect the cable to the outdoor unit

1. Remove the control cover from the unit by loos-ening the screw.Connect the wires to the terminals on the controlboard individually.

2. Secure the cable onto the control board with thecord clamp.

3. Refix the control cover to the original positionwith the screw.

4. Use a recognized circuit breaker "A" between the power source and the unit. A disconnecting device to adequately disconnectall supply lines must be fitted.

Terminal block

Over 5mm

Cover control

Connecting cable

Connecting cable

After the confirmation of the above conditions, prepare the wiring as follows:1) Never fail to have an individual power circuit specifically for the air conditioner. As for the method of

wiring, be guided by the circuit diagram posted on the inside of control cover.2) The screw which fasten the wiring in the casing of electrical fittings are liable to come loose from

vibrations to which the unit is subjected during the course of transportation. Check them and makesure that they are all tightly fastened. (If they are loose, it could cause burn-out of the wires.)

3) Specification of power source.4) Confirm that electrical capacity is sufficient.5) See to that the starting voltage is maintained at more than 90 percent of the rated voltage marked on

the name plate.6) Confirm that the cable thickness is as specified in the power source specification.

(Particularly note the relation between cable length and thickness. (Refer to page 27))7) Always install an earth leakage circuit breaker in a wet or moist area.8) The following would be caused by voltage drop.

• Vibration of a magnetic switch, which will damage the contact point, fuse breaking, disturbance of the normalfunction of the overload.

9) The means for disconnection from a power supply shall be incorporated in the fixed wiring and have anair gap contact separation of at least 3mm in each active(phase) conductors.

Outdoor Unit

CAUTION

7k~14k 18k 24k~28k 30k, 32k 36k, 38k

15 20 30 30 40

CircuitBreaker

(A)

Grade


4. Checking the Drainage and Forming the Pipings

1) Checking the drainage1. To remove the front panel from the indoor unit.

• Set the air direction louvers up-and-down to the posi-tion(horizontally) by hand.

• Remove the securing screws that retain the front pan-el. Pull the lower left and right sides of the grilletoward you and lift it off.

2. To check the drainage.• Pour a glass of water on the evaporator.• Ensure the water flows through the drain hose of the

indoor unit without any leakage and goes out the drainexit.

3. Drain piping• The drain hose should point downward for easy drain

flow.

• Do not make drain piping.

2) Form the piping1. Form the piping by wrapping the connecting por-

tion of the indoor unit with insulation material andsecure it with two kinds of vinyl tapes.• If you want to connect an additional drain hose, the

end of the drain outlet should be routed above theground. Secure the drain hose appropriately.

2. In cases where the outdoor unit is installed belowthe indoor unit perform the following.• Tape the piping, drain hose and connecting cable from

down to up.• Secure the tapped piping along the exterior wall using

saddle or equivalent.

3. In cases where the Outdoor unit is installed abovethe Indoor unit perform the following.• Tape the piping and connecting cable from down to up.• Secure the taped piping along the exterior wall. Form

a trap to prevent water entering the room.• Fix the piping onto the wall by saddle or equivalent.

Pull the right andthe left side.

Taping

Drainhose

Pipings

Connectingcable

Trap is required to prevent waterfrom entering into electrical parts.

Seal small openingsaround pipings with agum type sealer.

Seal a small opening around the pipings with gum type sealer.

Trap

Trap

Downward slope

Do not raiseAccumulateddrain water

Tip of drain hose dipped in water

Air

WavingWaterleakage

Waterleakage Ditch

Less than 50mm gap

Waterleakage


1. Check that all tubing and wiring have been properlyconnected.

2. Check that the gas and liquid side service valves arefully open.

1. Prepare remote control1. Remove the battery cover

by pulling it according to thearrow direction.

2. Insert new batteries making sure that the (+) and (–) of battery are installed correctly.

3. Reattach the cover bypushing it back into position.

NOTE:• Use 2 AAA(1.5volt) batteries. Do not use recharge-

able batteries.• Remove the batteries from the remote control if the

system is not going to be used for a long time.

2. Settlement of outdoor unit• Anchor the outdoor unit with a bolt and nut(ø10mm)

tightly and horizontally on a concrete or rigid mount.• When installing on the wall, roof or rooftop, anchor the

mounting base securely with a nail or wire assumingthe influence of wind and earthquake.

• In the case when the vibration of the unit is conveyedto the hose, secure the unit with an anti-vibrationbushing.

3. Evaluation of the performanceOperate unit for 15~20 minutes, then check the systemrefrigerant charge:1. Measure the pressure of the gas side service valve.2. Measure the temperature of the intake and discharge

of air.3. Ensure the difference between the intake tempera-

ture and the discharge is more than 8°C(46°F) (Cool-ing) or (Heating).

4. For reference; the gas side pressure of optimum con-dition is as below.(Cooling)

NOTE: If the actual pressure is higher than shown, thesystem is most likely over-charged, and chargeshould be removed. If the actual pressure arelower than shown, the system is most likelyundercharged, and charge should be added.

The air conditioner is now ready for use.

Bolt

Tubing connection

Discharge temperature

Discharge air

Intake temperature

5. Test Running

R-22 35°C (95°F) 4~5kg/cm2G(56.8~71.0 P.S.I.G.)

R-410A 35°C (95°F) 8.5~9.5kg/cm2G(120~135 P.S.I.G.)

Outside ambientTEMP.Refrigerant The pressure of the gas side

service valve.

This is performed when the unit is to be relocatedor the refrigerant circuit is serviced.Pump Down means collecting all refrigerant in theoutdoor unit without loss in refrigerant gas.

CAUTION:Be sure to perform Pump Down procedure with theunit cooling mode.

Pump Down Procedure1. Connect a low-pressure gauge manifold hose to

the charge port on the gas side service valve.2. Open the gas side service valve halfway and purge

the air from the manifold hose using the refrigerantgas.

3. Close the liquid side service valve(all the way in).4. Turn on the unit's operating switch and start the

cooling operation.5. When the low-pressure gauge reading becomes 1

to 0.5kg/cm2 G(14.2 to 7.1 P.S.I.G.), fully close thegas side valve stem and then quickly turn off theunit. At that time, Pump Down has been completedand all refrigerant gas will have been collected inthe outdoor unit.

PUMP DOWN


ON OFF

PLASMA

SET CANCEL

6

1

3

5

4

Cooling Operation

Auto Operation

Healthy Dehumidification Operation

Flip-up door(opened)

Heating Operation

Signal transmitter

10

11

12

13

1415

7

8

9

2

• Cooling Model( ), Heat Pump Model( )

Remote Control

START/STOP BUTTONOperation starts when this button is pressed and stopswhen the button is pressed again.

OPERATION MODE SELECTION BUTTONUsed to select the operation mode.

ROOM TEMPERATURE SETTING BUTTONSUsed to select the room temperature.

INDOOR FAN SPEED SELECTORUsed to select fan speed in four stepslow, medium, high and CHAOS.

JET COOLUsed to start or stop the speed cooling. (Speed cooling operates super high fan speed in cooling mode.)

CHAOS SWING BUTTONUsed to stop or start louver movement and set thedesired up/down airflow direction.

ON/OFF TIMER BUTTONSUsed to set the time of starting and stopping operation.

TIME SETTING BUTTONSUsed to adjust the time.

TIMER SET/CANCEL BUTTONSUsed to set the timer when the desired time is obtainedand to cancel the Timer operation.

SLEEP MODE AUTO BUTTONUsed to set Sleep Mode Auto operation.

AIR CIRCULATION BUTTONUsed to circulate the room air without cooling or heat-ing.

ROOM TEMPERATURE CHECKING BUTTONUsed to check the room temperature.

PLASMA(OPTION)Used to start or stop the plasma-purification function.

RESET BUTTONUsed prior to resetting time or after replacing batteries.

HORIZONTAL AIRFLOW DIRECTION CONTROL BUT-TON (NOT ON ALL MODELS)Used to set the desired horizontal airflow direction.

OperationName and Function-Remote Control

The remote control transmits the signals to the system.

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

Operation Mode


Name and Function-Remote Control

ON OFF

CANCEL

SET

1

3

5

4

9

10

12

14

16

7

2

8

13

15

11

6

Cooling Operation

Auto Operation

Healthy Dehumidification Operation

Flip-up door(opened)

Heating Operation

Signal transmitter

• Cooling Model( ), Heat Pump Model( )

Operation Mode

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

Remote Control

Signal transmitter

Transmits the signals to the room air conditioner.

START/STOP BUTTONOperation starts when this button is pressed andstops when the button is pressed again.

OPERATION MODE SELECTION BUTTONUsed to select the operation mode.

ROOM TEMPERATURE SETTING BUTTONSUsed to select the room temperature.

INDOOR FAN SPEED SELECTORUsed to select fan speed in four stepslow, medium, high and CHAOS.

JET COOLUsed to start or stop the speed cooling. (Speed cooling operates super high fan speed in cooling mode.)

CHAOS SWING BUTTONUsed to stop or start louver movement and set thedesired up/down airflow direction.

ON/OFF TIMER BUTTONSUsed to set the time of starting and stopping opera-tion. (See page 13)

TIME SETTING BUTTONSUsed to adjust the time.

TIMER SET/CANCEL BUTTONUsed to set the timer when the desired time isobtained and to cancel the Timer operation.

SLEEP MODE AUTO BUTTONUsed to set Sleep Mode Auto operation.

AIR CIRCULATION BUTTONUsed to circulate the room air without cooling orheating.

ROOM TEMPERATURE CHECKING BUTTONUsed to check the room temperature.

PLASMA(OPTIONAL)Used to start or stop the plasma-purification func-tion.

HORIZONTAL AIRFLOW DIRECTION CONTROLBUTTON (NOT ON ALL MODELS)Used to set the desired horizontal airflow direction.

RESET BUTTONUsed prior to resetting time or after replacing batter-ies.

2nd F ButtonUsed prior to using modes printed in blue at thebottom of buttons.


Disassembly of the parts (Indoor unit)

Warning :Disconnect the unit from power supply before makingany checks.Be sure the power switch is set to “OFF”.

To remove the Grille from the Chassis. • Set the up-and-down air discharge louver to open

position (horizontally) by finger pressure.• Remove the securing screws.• To remove the Grille, pull the lower left and right

side of the grille toward you (slightly tilted) and lift itstraight upward.

1. Before removing the control box, be sure totake out the wire screwed at the other end.

Display P.C.BConductor

Step MotorConductorEarth

Conductor

MotorConductor

SensorConductor

EarthConductor


2. To remove the Control Box.• Remove securing screws. • Pull the control box out from the chassis careful-

ly.

3. To remove the Discharge Grille.• Unhook the discharge grille and pull the dis-

charge grille out from the chassis carefully.

4. To remove the Evaporator. • Remove 3 screws securing the evaporator(at the

left 2EA in the Eva Holder, at the right 1EA).

Caution label

When repair, do not damage the Cautionlabel.

Caution label


• Unhook the tab on the right inside of the chassisat the same time, slightly pull the evaporatortoward you until the tab is clear of the slot.

5. To remove the Motor Cover• Remove 2 securing screw.• Pull the motor cover out from the chassis

carefully.

6. To remove the Cross-Flow Fan• Loosen the screw securing the cross-flow fan to

the fan motor (do not remove).• Lift up the right side of the cross-flow fan and the

fan motor, separate the fan motor from thecross-flow fan.

• Remove the left end of the cross-flow fan fromthe self-aligning bearing.

Motor cover


2-way, 3-way Valve

2-way Valve (Liquid Side) 3-way Valve (Gas Side)

Shaft position Shaft position Service port

Closed Closed Closed(with valve cap) (with valve cap) (with cap)

Open Closed Open(counter-clockwise) (clockwise) (push-pin or with

vacumm pump)

Open Open Closed(with valve cap) (with valve cap) (with cap)

Closed Open Open(clockwise) (counter-clockwise) (connected manifold

gauge)

Open Open Open(with charging

cylinder)

Open Open Open(with charging

cylinder)

Open Open

Open Open

Works

Shipping

Air purging(Installation)

Operation

Pumping down(Transfering)

Evacuation(Servicing)

Gas charging(Servicing)

Pressure check(Servicing)

Gas releasing(Servicing)

1.

2.

3.

4.

5.

6.

Valve cap

Open positionClosed position

Pin

Serviceport

Serviceport cap

To outdoor unit

Flare nut

To piping connection

To outdoor unit

Hexagonal wrench (4mm)

Open positionClosed position

To piping connection

Flare nut

Open(with charging cylinder)

Open(with charging cylinder)


1. Pumping down

• Procedure

(1) Confirm that both the 2-way and 3-way valvesare set to the open position. – Remove the valve stem caps and confirm that

the valve stems are in the raised position. – Be sure to use a hexagonal wrench to operate

the valve stems.

(2) Operate the unit for 10 to 15 minutes.

(3) Stop operation and wait for 3 minutes, thenconnect the charge set to the service port ofthe 3-way valve.– Connect the charge hose with the push pin to

the service port.

(4) Air purging of the charge hose.– Open the low-pressure valve on the charge set

slightly to air purge from the charge hose.

(5) Set the 2-way valve to the closed position.

(6) Operate the air conditioner at the coolingcycle and stop it when the gauge indicates1kg/cm2g.

(7) Immediately set the 3-way valve to the closedposition.

(8) Disconnect the charge set, and mount the 2-way and 3-way valve’s stem nuts and theservice port nut. – Use torque wrench to tighten the service port

nut to a torque of 1.8 kg.m. – Be sure to check for gas leakage.

Lo

Closed

Purge the air

Outdoor unit

Indoor unit Liquid side

Gas side

CLOSE

Open2-Wayvalve

3-Wayvalve

CLOSE


2. Evacuation (All amount of refrigerant leaked)

Lo

Open

Open

Vacuum pump

2-Wayvalve

Outdoor unit

Liquid sideIndoor unit

Gas side

3-Wayvalve

CLOSEOPEN

• Procedure

(1) Connect the vacuum pump to the charge set’scenter hose

(2) Evacuation for approximately one hour. – Confirm that the gauge needle has moved

toward -76 cmHg (vacuum of 4 mmHg or less).

(3) Close the valve (Lo side) on the charge set,turn off the vacuum pump, and confirm thatthe gauge needle does not move (approxima-tely 5 minutes after turning off the vacuumpump).

(4) Disconnect the charge hose from the vacuumpump. – Vacuum pump oil.

If the vacuum pump oil becomes dir ty ordepleted, replenish as needed.

CAUTIONUse vacuum pump equipped with check valueapplied to be prevented from flowing backward.


3. Gas Charging (After Evacuation)

Lo

Chargingcylinder

Outdoor unit

Indoor unit Liquid side

Gas side

CLOSE

Open2-Wayvalve

3-Wayvalve

OPENR-410A

Open

Check valve

• Procedure

(1) Connect the charge hose to the chargingcylinder. – Connect the charge hose which you dis-

connected from the vacuum pump to the valveat the bottom of the cylinder.

– If you are using a gas cylinder, also use a scaleand revers the cylinder so that the system canbe charged with liquid.

(2) Purge the air from the charge hose. – Open the valve at the bottom of the cylinder

and press the check valve on the charge set topurge the air. (Be careful of the l iquidrefrigerant). The procedure is the same ifusing a gas cylinder.

(3) Open the valve (Lo side on the charge set andcharge the system with liquid refrigerant.– If the system can not be charged with the

specified amount of refr igerant, it can becharged with a little at a time (approximately150g each time) while operating the airconditioner in the cooling cycle; however, onetime is not sufficient, wait approximately 1minute and then repeat the procedure(pumping down-pin).

(4) Immediately disconnect the charge hose fromthe 3-way valve’s service port. – Stopping partway will allow the gas to be

discharged.– If the system has been charged with liquid

refrigerant while operating the air conditionerturn off the air conditioner before disconnectingthe hose.

(5) Mount the valve stem nuts and the serviceport nut. – Use torque wrench to tighten the service port

nut to a torque of 1.8 kg.m.– Be sure to check for gas leakage.

This is different from previous procedures.Because you are charging with liquid refrigerantfrom the gas side, absolutely do not attempt tocharge with larger amounts of liquid refrigerantwhile operating the air conditioner.

CAUTIONThis unit is charged with R-410A. Pay attention not to charge R-22.


4. Additional gas charging(Gas leakage)• When refrigerant is insufficient by leakage, recharge the unit with the refrigerant up to normal operating

suction pressure.• Use the graph or the equation below to get operating suction pressure according to indoor and outdoor

temperature.Suction pressure was measured at 3-way valve service port after operating the unit for 10 minutes.

The method of using graph- Find outdoor temperature.- Find indoor temperature onto the curve of outdoor temperature.

- Read suction pressure at the axis of ordinates.

The method of using equation-. Calculate suction pressure after putting indoor and outdoor temperature into the equation.

13(At operating the Unit for 10 minutes)

Suc

tion

Pre

ssur

e(K

g/cm

2 .g)

Out

door

Tem

p.(˚

C)

Indoor Temp. (˚C)

12

11

10

9

8

7

6

55 10 15 20 25 30 35 40

50˚C

40˚C

30˚C

20˚C

10˚C0˚C

P = 3 + 0.0123 x Tout1.5 + 0.8 x Tin0.5

Where, P : Suction Pressure(kg/cm2.g)Tout : Outdoor Temperature(˚C)Tin : Indoor Temperature(˚C)

Operating Suction Pressure(According to Indoor & Outdoor Temperature)


Cycle Troubleshooting Guide

Trouble analysis

1. Check temperature difference between intake and discharge air and operating current.

Temp. Difference

Temp. difference : approx. 0°CCurrent : less than 80% of

rated current

Temp. difference : approx. 8°CCurrent : less than 80% of

rated current

Temp. difference : less than 8°CCurrent : over the reated

current

Temp. difference : over 8°C

Operating Current

• All amount of refrigerant leakedout. Check refrigeration cycle.

• Refrigerant leakegeClog of refrigeration cycleDefective compressor

• Excessive amount of refrigerant

• Normal

Notice : Temperature difference between intake and discharge air depends on room air humidity. When the room airhumidity is relativery higher, temperature difference is smaller. When the room air humidity is relatively lowertemperature difference is larger.

2. Check temperature and pressure of refrigeration cycle.

Notice : 1. The suction pressure is usually 4.5~6.0 kg/cm2G(Cooling) at normal condition. 2. The temperature can be measured by attaching the thermometer to the low pressure tubing and wrap it with

putty.

Suction pressure Temperature(Compared with (Compared with Cause of Trouble Description

the normal value) the normal valve)

Defective compressor Current is low.Defective 4-way reverse valve

Excessive amount of High pressure does not quicklyNormal refrigerant rise at the beginning of

operation.

Insufficient amount of Current is low.Lower Higher refrigerant (Leakage)

Clogging Current is low.

High

Higher


Electronic Parts Troubleshooting Guide 1. Product does not operate at all.

(* Refer to Electronic Control Device drawing and Schematic diagram.)

Turn off Main Power

Turn on Main Power

Does "beeping" sound is made from the Indoor Unit?

Primarily, the operating condition of Micom is OK.Check the voltage of power(About AC 220V, 60Hz)(About AC 220/240V, 50Hz)

• Main power's voltage• Voltage applied to the unit• Connecting method of Indoor/Outdoor connecting

cable• Check PWB Assembly

- Fuse- Pattern damage- Varistor(ZNR01J)

Check the connection housing for contacting

• Connector related to CN-TAB1, RY-COMP NO.3• Connector related to CN-MOTOR• Connector contacting of Outdoor Fan/Compressor• Display PWB Assembly Check

Check each load(Indoor/Outdoor Fan Motor,Compressor, Stepping Motor) and contacting condition of related connector

Main PCB Board Operation Check

Items

• SMPS Transformer(Indoor unit)- Input Voltage- Output Voltage(ZD02D)

• IC04D(7805) Output(Indoor/Outdoor unit)

• IC01A(KIA7036, Reset IC)X01(8MHz)

• Replace Trans

• Replace IC04D

• Replace faulty parts

- About AC220V/240V±10% - Check the power voltage- About DC12V

• DC +5V

• Voltage of Micom No. 2,(DC +4.5V over) and Soldering condition.

Content Remedy

NO YES

(After 10 seconds)


2. The product is not operate with the remote control.

Turn on Main Power

While the compressor has been stopped, the compressor does notoperate owing to the delaying function for 3 minutes after stopped.

Caused by other parts except the remote controlCause by the remote control

When the mark( ) is displayed in LCD screen, replacebattery.

Check the contact of CN-DISP1 connector.

When the compressor stopped Indoor Fan is driven by a low speed.At this point the wind speed is not controlled by the remote controller.(When operated in the Sleeping Mode, the wind speed is set to thelow speed by force.)

Check Display PWB Assembly- Voltage between CN DISP1 - : DC +5V

Check the connecting circuit between the remote controllerMICOM (No. ) - R17(2Ω) - IR LED - TR - R16(2.2KΩ).

Check point

• Check the connecting circuit between CN-DISP1 -R01L(5.1kΩ) - C01L(680pF) - MICOM PIN

• Check Receiver Assembly43


3. Compressor/Outdoor Fan are unable to drive.

Turn on Main Power

Operate "Cooling Mode( )" by setting the desired temperature of theremote controller is less than one of the indoor temperature by 1°C at least.

When in Air Circulation Mode, Compressor/Outdoor Fan is stopped.

Check the sensor for indoor temperature is attached as close as to beeffected by the temperature of Heat Exchanger(EVA).

When the sensor circuit for indoor temperature and connector are in badconnection or are not engaged, Compressor/Outdoor Fan is stopped.

• Check the related circuit of RY-FAN.• Check the indoor temperature sensor is disconnected or not(About 10kΩ / at 25°C).

Turn off Main Power

• Check the electrical wiring diagram of outdoor side.• Check the abnormal condition for the component of

Compressor/Outdoor Fan Motor.• Check the "open" or "short" of conmecting wires between indoor and

outdoor.

Check Relay(RY - COMP) for driving compressor.

• When the power(About AC220V/240V) is applied to the connecting wireterminal support transferred to compressor, PWB Assembly is normal.

• Check the circuit related to the relay.Check point COMP ON COMP OFF

Between Micom(No.DC5V DC0V

62) and GNDBetween IC01M(No. 14) Below DC 1V

About DC12Vand GND (app)


Check the TRIAC high speed operation by remote control.(The Indoor Fan Motor is connected)

Turn off Main power

Check the connection of CN-MOTOR

Check the Fan Motor

Check the Fuse(AC250V/T2A)

Turn ON Main Power

Check the related circuit of indoor Fan Motor.

• The pin NO 63 of Micom, and the part for driving TRIAC(the input andoutput signal of IC01M, PIN NO 7, 10)

• Check the pattern• Check the TRIAC

- TRIAC Open: Indoor Fan Motor never operate- TRIAC short: Indoor Fan Motor always operates in case of ON or OFF.

4. When indoor Fan does not operate.

The voltage of PIN NO 1(orange) and 3(yellow) of CN-MOTOR.

About AC 180V over About AC 50V over

TRIAC is not damaged TRIAC Check


• Confirm that the Vertical Louver is normally geared with the shaft ofStepping Motor.

• If the regular torque is detected when rotating the Vertical Louver withhands Normal

• Check the connecting condition of CN-U/D Connector• Check the soldering condition(on PWB) of CN-U/D Connector

If there are no problems after above checks

• Confirm the assembly conditions that are catching and interfering partsin the rotation radial of the Vertical Louver

5. When Vertical Louver does not operate.

Check the operating circuit of the Vertical Louver

• Confirm that there is DC +12V between pin (RED) of CN-U/D andGND.

• Confirm that there is a soldering short at following terminals.- Between , , and of MICOM- Between , , and of IC01M- Between , , and of IC01M

60 61 62 63


6. When Heating does not operate

Operate “Heating Mode( )” by setting the desired temperature of theremote control is higher than one of the indoor temperature by 2°C atleast.

In heating Mode, the indoor fan operates in case the pipe temperatureis higher than 28°C.

Check the connector of intake and pipe sensor(thermistors)

• Check the related circuit of RY-4WAY• Check the indoor room temperature is disconnected or not (about

10KΩ/at 25°C).• Check the indoor pipe temperature is disconnected or not (about

5KΩ/at 25°C).

Turn ON Main Power

Check the DC voltage on the PWB ASSEMBLY

• The details of check are as followings

Check point

Between Micom(NO.59) and GND

Between IC01M(NO.11) and GND

Comp ON

DC 5V

Below DC 1V

Comp OFF

DC 0V

About DC12V

Check point



4 way ON

DC 5V

Below DC 1V

4 way OFF

DC 0V

About DC 12V

Check point



Fan ON

DC 5V

Below DC 1V

Fan OFF

DC 0V

About DC 12V

• Comp Relay.

• 4 way Relay

• Outdoor fan Relay


Turn off Main Power

• Check the electrical wiring diagram of outdoor side.• Check the abnormal condition for the component of

Compressor/Outdoor Fan Motor, 4 way.• Check the "open" or "short" of connecting wires between indoor and

outdoor.


Electronic Control Device

(1) MAIN P.W.B ASSEMBLY (AC PART)• TOP VIEW • BOTTOM VIEW

(1) MAIN P.W.B ASM (AC)• COOLING MODEL • HEAT PUMP MODEL


(2) MAIN P.W.B ASSEMBLY (DC PART)• TOP VIEW • BOTTOM VIEW

• TOP VIEW • BOTTOM VIEW


(3) DISPLAY ASSEMBLY

– 6871A20194• TOP VIEW

• BOTTOM VIEW

• BOTTOM VIEW

• BOTTOM VIEW

– 6871A30009• TOP VIEW

– 6871A20227• TOP VIEW


Schematic Diagram

TE

LEP

HO

NE

-CO

NT

RO

L M

OD

EL

ON

LY


Cooling Model• LED TYPE


Cooling Model• HVB TYPE(PLASMA)


Heat Pump Model• LED TYPE

VP

161

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5V

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TX

5VC06

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RX

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5.1V

, 1/2

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R02

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R03

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IA70

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NC

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121314

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1011

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OK

ZN

R01

R19

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BS

P35

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Opt

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LE (

OP

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2 1


Heat Pump Model• HVB TYPE

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RM

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36D

120,

1/2

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1

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+

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CO

MP

RE

SS

OR

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1(L)

1

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45

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OU

TD

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R

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T

A104

SQ

02T

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S

89

4WAY

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65

73

42

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1514

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MK

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F

CN

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1 1

OR

45

45

RD

3 3

YL

C03T

102

R01T 1K

5V

Q04

T

C104

SQ

01T

A104

S

102

C02T

5V

104

C01T

D01T

1N41

48

2

12

133

CN

-TE

L

5V

TE

LE (

OP

TIO

N)

12


Exploded View and Replacement Parts List 1. Indoor Unit

346810

146811

131410

359011

342800

147581

268711A

149304

354210135311

135316

267110

733010

135314

152302

35211B135516

352150

249951

268711B

268711D

268711C

W6640 263230

264110

352115

352116


263230

268711B

264110268711C

249951

W0CZZA

346810

146811

131410

359011

342800

147581

268711A

149304

354210135311

135316

267110

733010

135314

152302

35211B135516

352150

352115

352116


2. Outdoor unit

554031

437212

435511

552202

552116552102B

552201

554160

561410

552111

550140 552203B

552203A

430410

447910

649950

552102A

437211

435301349480

559010

546810349600

P/NO : 3828A20135A FEBRUARY, 2008

Documents

LG LSR120H Service Manual