LG LS-E0960CM, LS-E0960CD, LS-E0960HD, LS-F1260CL, LS-F1260CM Service Manual

SERVICE MANUAL

Room Air Conditioner

MODEL : LS-E0960CL/CM/CD

LS-E0960HL/HM/HD
LS-F1260CL/CM/CD
LS-F1260HL/HM/HD

Contents

Functions

.................................................................................................................................

3

Product Specifications (Cooling Only)

..................................................................................

5

Product Specification (Cooling & Heating)

...........................................................................

6

Dimensions

..............................................................................................................................

7

Refrigeration Cycle Diagram

................................................................................................

10

Wiring Diagram

......................................................................................................................

11

Operation Details

..................................................................................................................

13

Display Function

...................................................................................................................

21

Self-diagnosis Function

........................................................................................................

21

Installation

.............................................................................................................................

22

Operation

...............................................................................................................................

38

Disassembly of the parts (Indoor Unit)

...............................................................................

40

2-way, 3-way Valve

.................................................................................................................

43

Cycle Troubleshooting Guide

...............................................................................................

50

Electronic Parts Troubleshooting Guide

.............................................................................

51

Electronic Control Device

.....................................................................................................

58

Schematic Diagram

...............................................................................................................

60

Exploded View & Replacement Parts List

...........................................................................

62

-2-

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

--- Lights up in operation

--- Lights up in Sleep Mode

--- Lights up in Timer Mode

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

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

• 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

• Both the indoor and outdoor fan
stops during deicing.

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

Sleep Mode Auto Control

Natural Air Control by CHAOS Logic

Airflow Direction Control

-3-

Deice (defrost) control (Heating)

Hot-start Control (Heating)

-4-

TEMPERATURETEMPERATURE

LOWLOW

HIGHHIGH

Cooling Operation Mode ( ) Auto Operation Mode ( )
Soft Dry Operation Mode ( ) Heating Operation Mode ( )

(Heating model only) (Cooling model only)

Remote Controller

Operation ON/OFF

(Low)

(Med)

(High)

(CHAOS)

: High: 39°C LOW : 11°C

Down to 18°C
Up to 30°C,

Cooling

: 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.

Operation Mode Selection

Fan Speed Selection

Room, Temperature Display

Temperature Setting

Setting the Time or timer

Timer Selection

Timer Setting

Timer Cancel

Sleep Operation

Airflow Direction Control

Air Circulation Mode

Reset

Down to 16°C
Up to 30°C,

Heating

-5-

Product Specifications (Cooling Only)

Model Name

Item Unit

Cooling Capacity Btu/h 8,700 12,000
Moisture Removal l/h 1.2 1.2
Power Source Ø, V, Hz 1Ø, 220-240V, 50Hz

Indoor 5.2 8.6
Outdoor 25 25
Indoor 35 36

Outdoor 48 49
Input W 890 1,070
Running Current A 3.8 4.6
E.E.R. Btu/hw 9.77 11.2

Indoor 5.7 15

Outdoor 14.5 25

Indoor 804×245×153 900×280×178

Outdoor 684×624×270

Indoor 7 9

Outdoor 25 28
Refrigerant (R-22) g 600 860
Airflow Direction Control (Up & Down) 󱇩󱇩
Remocon Type L.C.D Wireless

Liquid

inch(mm)

1/4" (6.35)

Gas 3/8" (9.52) 1/2"(12.7)
Sleeping Operation 󱇩󱇩
Drain Hose 󱇩󱇩
Connecting Cable 1.0mm

2

Power Cord 1.0mm

2

Air Circulation

Noise Level

m3/min

dB (A)±1

Service Valve

Motor Output

Dimensions
(W×H×D)

Net. Weight

W

mm

kg

9K Btu 12K Btu

Cooling Only Cooling Only

SPEC. AT 240V

-6-

Product Specifications (Cooling & Heating)

Model Name

Item Unit

Cooling Capacity

Btu/h

8,500 12,000
Heating Capacity 9,300 12,500
Moisture Removal l/h 1.2 1.7
Power Source Ø, V, Hz 1Ø, 220-240V, 50Hz

5.4 9.0
24 25
35 37
49 51

Cooling

W

890 1,240

Heating 890 1,090

Running Cooling

A

3.8 5.3

Current Heating 3.8 4.7
E.E.R. Cooling Btu/hw 9.551 9.677
C.O.P Heating 3.062 3.360

10 15
25 25

804 x 245 x 153 900 x 280 x 178

684 x 624 x 270 810 x 555 x 262

79

25 35

Refrigerant (R-22) g 610 860
Airflow Direction Control (Up & Down) 󱇩󱇩
Remocon Type L.C.D Wireless

inch(mm)

1/4" (6.35)

3/8" (9.52) 1/2"(12.7)
Sleeping Operation 󱇩󱇩
Drain Hose 󱇩󱇩
Connecting Cable 1.0mm

2

Power Cord 1.0mm

2

Air Circulation

Noise Level

Input

m3/min

dB (A)±1

Indoor

Outdoor

Indoor

Outdoor

Indoor

Outdoor

Indoor

Outdoor

Indoor

Outdoor

Liquid

Gas

Service Valve

Motor Output

Dimensions
(W×H×D)

Net. Weight

W

mm

kg

9K Btu 12K Btu

Cooling & Heating Cooling & Heating

SPEC. AT 240V

Dimensions

(1) Indoor Unit

-7-

Installation plate

Tubing hole cover

Installation plate

D

H

W

Right rear piping

Left rear piping

ø70mm

ø70mm

50mm

20mm

20mm

80mm

ø70mm

A

A

A

A

Center

Right rear pipingLeft rear piping

Center

ø70mm

MODEL

DIM Unit

W mm 804 900

H mm 245 280
D mm 153 178

9K Btu Series

12K Btu Series

( 9K, 12K )

( 9K )

( 12K )

( 9K )

( 12K )

(2) Outdoor Unit ( 9K, 12K)

W

L2

L3

L1

D

H

L4

L5

Gas side

(3-way valve)

Liquid side

(2-way valve)

MODEL

DIM unit

W mm 684

H mm 640

D mm 270
L1 mm 305
L2 mm 62
L3 mm 472
L4 mm 16
L5 mm 193

9K Btu Cooling & Heat Pump

12K Btu Cooling Only

-8-

(3) Outdoor Unit(12K Heat Pump)

W

D

L1

L2

H

L3

L4

L5L6 L7 L8

L9

L10

Liquid side
2-way valve

Gas side
3-way valve

-9-

MODEL

12K Btu Heat Pump

DIM unit

W mm 801

H mm 555

D mm 262
L1 mm 339
L2 mm 37
L3 mm 543.6
L4 mm 11.4
L5 mm 591
L6 mm 105
L7 mm 105
L8 mm 72.5
L9 mm 86.4

L10 mm 77

Refrigeration Cycle Diagram

-10-

Pipe size(Diameter:Ø)

MAX. Max

MODEL Piping length Elevation

Gas(inch) Liquid(inch)

(m) (m)

3/8" 1/4" 15 7

INDOOR UNIT OUTDOOR UNIT

HEAT
EXCHANGE
(EVAPORATOR)

HEAT
EXCHANGE
(CONDENSER)

COMPRESSOR

ACCUMU
LATOR

GAS SIDE

3-WAY VALVE

LIQUID SIDE

2-WAY VALVE

CAPILLARY TUBE

CHECK VALVE

(Heating Model only)

COOLING
HEATING

REVERSING
VALVE
(Heating Model Only)

1/2" 1/4" 15 7

9K Btu SERIES

12K Btu SERIES

Wiring Diagram

-11-

DISPLAY PCB ASM

INDOOR WRING DIAGRAM

MAIN PCB

ASM

3854AR6093A

CN-DISP

PILLAR
TERMINAL

RY-COMP

CN-POWER

FUSE AC250V/T2A

SSR

CN-FAN

SH-CAPA

MOTOR

CN-UP/DOWN

CN-TH

CN-LE/RI

TO OUTDOOR UNIT

STEP

MOTOR

LE/RI

STEP

MOTOR

UP/DOWN

1(L) 2(N)

GN/YLGN/YL

BLBR

BL

BR

BL

YL

OR

BK

BR

GN/YL

BR

THERMISTOR

POWER

RD

BL

BL

GN/YL

BR

GN/YL

BL

BL BL

BL

YL

RD

BL

YL

RD

GN/YL

RD

BL

BR

BR

BR

HCF

PTC

C

S

R

OLP

1(L) 2(N)

3854AR6093B

FAN

MOTOR

COMP.

CAPACITOR

BR YL

OUTDOOR WIRING DIAGRAM

TERMINAL
BLOCK

TO INDOOR UNIT

SUPPORT

VALVE

1. Indoor Unit 2. Outdoor Unit

(1) 9K, 12K, Btu Cooling Only

-12-

DISPLAY PCB ASM

INDOOR WRING DIAGRAM

MAIN PCB

ASM

3854AR6093C

CN-DISPLAY

PILLAR
TERMINAL

RY-COMP

RY-4WAY

RY-FAN

CN-POWER

FUSE AC250V/T2A

SSR

ZNR

CN-FAN

SH-CAPA

MOTOR

CN-UP/DOWN

CN-TH

CN-LE/RI

TO OUTDOOR UNIT

STEP

MOTOR

STEP

MOTOR

1(L) 2(N)

34

GN/YL

GN/YL

BLBR

BL

BR

RD

BK

RD

BK

BL

YL

OR

BK

BR

GN/YL

BR

THERMISTOR

POWER

BL BK

BK

BL

YL

YL

BR

RDBL

BR

RD

GN/YL

GN/YL

BL BK

RD

BR

GN/YL

BL BL

PTC

3854AR6093D

FAN

MOTOR

RD

BL

BR

C

S

R

COMP.

REVERSING

VALVE

OUTDOOR WIRING DIAGRAM

TERMINAL
BLOCK

TO INDOOR UNIT

OLP

H

CF

CAPACITOR

1(L) 2(N) 3 4

1. Indoor Unit

(2) 9K, 12K Btu Cooling & Heating

2-1. Outdoor Unit (9K)

2-2. Outdoor Unit (12K)

3854AR2262E

Operation Details

1. Time Delay Safety Control

• 3min. ;The compressor operation is delayed for 3 minutes to balance the pressure of cycle.
(Protection of compressor)

• 5sec. ;

The indoor fan is delayed for 5 seconds, when operating initially, to prevent noises occurred by the vertical
louver and wind.

• 30sec

.;

The 4-way valve is ceased for 30sec. to prevent the refrigerant-gas abnormal noise when the Heating
operation is OFF or switched to the other operation mode.

2. Airflow Direction Control

• This function is to swing the vertical louver up and down automatically and to set it at a fixed position.

• The procedure is as the following.

1st ; Press the ON/OFF Button to operate the unit.
2nd ; Press the Airflow Direction Control Button to swing the vertical louver up and down automatically.
3nd ; Repress the Airflow Direction Control Button to set the vertical louver at a fixed position.

3. Cooling Mode Operation

• When selecting the Cooling( ) Mode Operation, the unit will operate according to the setting by the
remote controller and the operation diagram is shown below.

-13-

Setting point:
(Cooling)

CLOSED

OPEN

Cooling

Heating

140°

8°

8

7

6

5

4

3

2

1

Setting point:
(Heating)

INTAKE AIR TEMP.

SETTING TEMP. +0.5°C
(Compressor ON)

SETTING TEMP. -0.5°C
(Compressor OFF)

More than
3 minutes

More than
3 minutes

INDOOR FAN SPEED
COMPRESSOR

Selecting
fan speed

Selecting
fan speed

Selecting
fan speed

Low

ON OFF ON ONOFF

Low

4. Soft Dry Operation Mode

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

• When the room temperature rises over the compressor ON temperature, the operation mode is switched to
the Cooling operation.

• When the room temperature falls the compressor OFF temperature, the operation mode is switched to the
Soft Dry Operation.

• The operation diagram is shown below.

-14-

INDOOR FAN

Selecting

fan speed

LOW

LOW LOW

ON ON ONOFF OFF

OFF LOWOFF

Operation

Cooling

Dry Operation

COMPRESSOR

SETTING TEMP.+0.5°C

(COMP. ON)

ROOM TEMP.

SETTING TEMP.

(COMP. OFF)

3.2 minutes

10 minutes

40 seconds 40 seconds

3.2 minutes

maximum

10 minutes

maximum
3 minutes

5. Cooling Mode with Sleep Mode Auto Control

•When selecting the Cooling( ) combined with the Sleep Mode Auto Control( ), the operation diagram is
as following.

•The setting temperature will be automatically raised by 1°C 30 minutes later and by 2°C 1 hour later.

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

INTAKE AIR TEMP.

INDOOR FAN SPEED Low Low Low Low

ON OFF ON

Low

More than

3 minutes

More than
3 minutes

30 minutes 30 minutes

ONOFFCOMPRESSOR

SETTING TEMP.+0.5°C

(Compressor ON)

SETTING TEMP.-0.5°C

(Compressor OFF)

1°C

1°C

-15-

6. Auto Operation

• The operation procedure is as following.

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

• Auto Operation for Cooling

Press Start/Stop Button

Select Auto Operation Mode

Check the Room temperature

Operation mode
Indoor fan speed are automatically decided by Fuzzy rule.
Setting temperature

Intake-air

temperature

Operation Mode

Over below
21°C24

°

C

Soft Dry

below 21°C

Heating

Over 24°C

Cooling

~

Intake-Air temp.

INDOOR FAN SPEED

COMPRESSOR ON OFF

Fuzzy Speed

ON OFF

Setting Temp. +0.5°C

(Compressor OFF)

Setting Temp. -0.5°C

(Compressor ON)

More than

3 minutes

Intake-air Temperature Setting Temperature

Over 26°C25°C
Over 24°C~below 26°C Intake air -1°C
Over 22°C~below 24°C Intake air -0.5°C
Over 18°C~below 22°C Intake air temperature

below 18°C18°C

Over 18°C~below 30°C Fuzzy control

below 18°C18°C Fuzzy control

over 30°C30°C Fuzzy control

Operation Condition

When Auto Operation
initial start

Controlled by

Fuzzy logic

1/f rhythm

Fan Speed Air DirectionControl

When Switch to Auto
Operation

-16-

■ Auto Operation for Soft Dry

The Setting temperature will be same that of auto operation for Cooling.

- Compressor ON temperature; Setting temperature +0.5°C

- Compressor OFF temperature; Setting temperature -0.5°C

■ Auto Operation for Heating

Intake Air temp. below 20°C Over 20°C~below 21°C

Setting temp. 20°C Intake air temperature +0.5°C

7. Heating Mode Operation

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

Intake Air temp.

INDOOR FAN SPEED OFF

Hot

Start

Selecting

fan speed

Selecting

fan speed

LOW

LOW

A

minimum

10sec.

1 min.

minimum

10sec.

minimum

10sec.

A

B

LOWOFF LOW OFF

COMPRESSOR ON OFF ON OFF

Setting temp. +3°C
(Compressor OFF)

• A point; The indoor pipe temperature to be 35°C.
The indoor fan operates minimum 10sec. even if falls lower than 35°C.

• B point; The indoor fan operates minimum 10sec.

Setting temp.
(Compressor ON)

-17-

8. Hot-Start Control

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

• The operation diagram is as following.

28°C

PIPE TEMP.

INDOOR

FAN SPEED

OFF LOW

SELECTING
FAN SPEED

COMPRESSOR

HOT-START BY TEMPERATURE

ON

60 sec.

-18-

T1

TE1

TE2

T2

COMPRESSOR

TEMP °C

Pipe Temp.

Intake Air

Temp.

4-WAY VALVE

OUTDOOR FAN

INDOOR FAN

DEICE LED

ON

Heating

25 mins

60 minutes

25 mins

Deicing

Hot

Start Heating

ON(Heating Operation)

ON
ON

OFF

ON
ON
ON
ON

OFF

ON
OFF
OFF

ON
ON
ON

OFF

ON

T1

T2

9. Deice Control

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

• Deicing operation checks the indoor pipe temperature and Intake-air temperature at 25 minutes and 60 minutes

on starting of heating operation, and discriminates by temperature difference.

• When the heating operation passed 25 minutes, the temperature (△T1=TE1–TR1) is checked and memorized
with checking the indoor pipe temperture (TE1) and the indoor Intake-air temperature (TR1).

• When the heating operation passed 60 minutes, deicing operation checks the indoor pipe temperature (TE2)
and the indoor Intake-air temperature (TR2), and checks indoor pipe temperature(TE2), the temperature
difference (△T2=TE2–TR2) and the temperature difference △Td(=△T1–△T2) of △T1, △T2.
If temperature of indoor pipe is below 32°C Deicing function operates at the priority I condition.
If temperature of indoor pipe is over 32°C Deicing function operates at the priority II condition.

If the temperature difference (△Td) become more than the option temperature, deicing operation starts.

• At that time, deicing operation time is decided.

• The deicing operation time starts after deicing operation started.

• If deicing operation start, above heating operation time is reset, so if deicing operation is finished, the heating

operation time is recounted.

• The deicinig time and the operation diagram are as following.

T1- T2 Td Over 6°C 5~6°C 4~5°C 3~4°C below 2.0°C

Deicing Time 10mins 9mins 8mins 7mins Heating Operation

TE2 Below 30°C 30~31°C 31~32°C Over 32°C

Deicing Time 12mins 11mins 10mins Heating Operation

(DEICING DIAGRAM)

Priority I

Priority II

-19-

10. Natural Wind by CHAOS Logic

There are common rules in the irregular changes amid the breeze of highlands and valleys, the sound of
streams, the songs of birds in the forest and brain waves of relaxation.
Mmm... the breath-taking and touchy feeling of wind from the deep mountains and dark valleys.
Through analysis in its chaos simulator, Goldstar has successfully created such a feeling of freshness and
serenity by analyzing the frequency of natural wind.

Generally natural wind has the following character (frequency-Magnitude), for example dark valley, sea, moun­tain wind.

So as to make a similar Natural wind function, Indoor fan speed is shifted to high from low or reversely according
to the CHAOS logic.

Magnitude

Natural wind function

Frequency(Hz)

-20-

11. Forced Operation

• If you lose wireless remote controller, you can operate the unit with forced operation switch.

• The standard conditions are as following.

12. 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.
In case the air conditioner does not receive any signal from the remote control, it will turn off automatically after
7 hours.
If you want to use this operation, Open the front panel upward and move the slide switch to the Auto Restart
position.
If you do not want to use this operation, move the Slide Switch to the Remote control position.

Slide Switch

FORCED
OPERATION

AUTO
RESTART

REMOTE
CONTROL

• When you are out for a while, move the
Slide switch to the REMOTE CONTROL.

Slide Switch

Open the front

panel upward

Room Temp ≥ 24°C24°C > Room Temp ≥21°C Room Temp<21°C

Cooling Soft Dry Heating

High Low High

22°C23°C24°C

Operation Mode
FAN Speed

Setting Temp

Display Function

1. Heating Model 2. Cooling Model

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

• Timer Mode • Timer Mode

• Sleep Mode • Sleep Mode

• Hot-start, Deice

Self-diagnosis Function

■ Thermistor Cut Off or Short

Cut Off/Short : Blinks on and off the operation mode LED. (0.5 sec ON/3 sec OFF)

■ Protection of the evaporator pipe from frosting

If the temperature of the indoor pipe is below 0°C after 7 minutes from starting the compressor, the compressor
and outdoor fan is stopped, and then after 3 minutes delay of operating of the compressor, when the tempera­ture of the indoor pipe is over 7°C, the compressor and the outdoor fan is reoperated.

Operation Indicator

Sleep Timer Indicator

Timer Indicator

Deicer Indicator

-21-

Operation Indicator

Sleep Timer Indicator

Timer Indicator

Compressor on Indicator

OUT

DOOR