Lg Lmn1830c2l Service Manual

Internal Use Only

http://biz.lgservice.com

Multi Air Conditioner

SVC MANUAL(Exploded View)

MODEL : LM-1830C2L/M/N

LM-1830H2L/M/N

LM-2430C2L/M/N

LM-2430H2L/M

L2-C243AL1

CAUTION

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

Contents

Functions......................................................................................................................................	3
Product Specifications ................................................................................................................	5
Dimensions...................................................................................................................................	9
Refrigeration Cycle Diagram.....................................................................................................	11
Wiring Diagram ..........................................................................................................................	12
Operation Details .......................................................................................................................	13
Display Function ........................................................................................................................	20
Self-diagnosis Function ............................................................................................................	20
Installation ..................................................................................................................................	21
Operation ....................................................................................................................................	35
Disassembly of the parts (Indoor Unit)....................................................................................	37
2-way, 3-way Valve .....................................................................................................................	39
Cycle Troubleshooting Guide ....................................................................................................	43
Electronic Parts Troubleshooting Guide..................................................................................	45
Electronic Control Device .........................................................................................................	52
Schematic Diagram....................................................................................................................	55
Exploded View............................................................................................................................	57

Copyright ©2008 LG Electronics. Inc. All right reserved.	- 2 -
Only for training and service purposes	LGE Internal Use Only

Functions

Indoor Unit

Operation ON/OFF by Remote controller

Sensing the Room Temperature

• Room temperature sensor. (THERMISTOR)

Room temperature control

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

Starting Current Control

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

Time Delay Safety Control

• Restarting is inhibited for approx. 3 minutes.

Indoor Fan Speed Control

• High, Med, Low, Chaos

Operation indication Lamps (LED)

--- Lights up in operation

--- Lights up in Sleep Mode

--- Lights up in Timer Mode

--- Lights up in Deice Mode(for Heat pump model)

Outdoor unit operation

OUT

DOOR --- Lights up in Compressor operation(for Cooling model)

Deice (defrost) control (Heating)

Health Dehumidification Operation

• Both the indoor and outdoor fan stops

during deicing.

• Intermittent operation of fan at low speed.

• Hot start after deice ends.

Hot-start Control (Heating)

Sleep Mode Auto Control

• The indoor fan stops until the

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

evaporator piping temperature will be

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

reached at 28°C.

Natural Air Control by CHAOS Logic

PLASMA

• The fan is switched to intermittent or irregular operation

• The function will be operated while in any

operation mode with selecting the function.

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

• The function is to be stopped while it is

Airflow Direction Control

operating with selecting the function.

• The louver can be set at the desired position or swing

Soft Dry Operation Mode

up and down automatically.

• Intermittent operation of fan at low speed.

Copyright ©2008 LG Electronics. Inc. All right reserved.	- 3 -
Only for training and service purposes	LGE Internal Use Only

Remote Controller

Operation ON/OFF

Operation Mode Selection

(Cooling (Heating model only) model only)

Cooling Operation Mode.(	)	Auto Operation Mode.(	)
Healthy Dehumidification Operation Mode.(		) Heating Operation Mode.(	)

Fan Speed Selection

(Low)

(Med)

(High)

(CHAOS)

Room, Temperature Display

: High: 39°C(102˚F) LOW : 11°C(52˚F)

Temperature Setting

TEMPERATURE HIGH LOW

JET COOL

Cooling			Down to 18°C(64˚F)	Heating			Down to 16°C(60˚F)
			Up to 30°C(86˚F)				Up to 30°C(86˚F)

Setting the Time or Timer

Timer Selection

ON OFF

: OFF, ON, OFF ON

Timer Setting

SET

Timer Cancel

CANCEL

: Cancel Sleep Mode, Timer ON or Timer OFF

Sleep Operation

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

Airflow Direction Control

˚C To ˚F Swtiching Button

˚C / ˚F

Fan Operation Mode

: Fan Operates without cooling or heating.

Reset

Copyright ©2008 LG Electronics. Inc. All right reserved.	- 4 -
Only for training and service purposes	LGE Internal Use Only

Product Specifications

1. LM-1830C2L/M
	Operation		A-Unit + B-Unit		A-Unit	B-Unit	Remarks
Item	Unit				Only	Only
Cooling Capacity		Btu/h(kcal/h)	17,000/18,000		8,500/9,000	8,500/9,000	208/230V
Heating Capacity				–		–	–
Moisture Removal		/h		2.4	1.2	1.2	at 230V
Power Source		ø, V, Hz		1Ø, 208/230V, 60Hz
Air Circulation		/min	Indoor	–	7.0	7.0
			Outdoor		42
Noise Level		dB(A)	Indoor	–	39/37/35	39/37/35	at 230V
( Hi / Med / Low )			Outdoor		53
Input	Cooling	W	1,680/1,700		930/950	930/950
	Heating			–	–	–
Running	Cooling	A		8.2/7.5	4.5/4.0	4.5/4.0	208/230V
Current	Heating			–	–	–
E.E.R.	Cooling	Btu/h.w	10.1/10.6		9.1/9.5	9.1/9.5
C.O.P.	Heating	-		–	–	–
Dimensions(W x H x D)		mm	Indoor		802 x 262 x 165
			Outdoor		870 x 655 x 320
Net. Weight		kg	Indoor		7
			Outdoor		61
Service Valve		mm(Inch)	Liquid		6.35(1/4")
			Gas		9.52(3/8")
Refrigerant(R-22)		g		–	780	780	at 7.5m
Airflow Direction Control(Up & Down)					O
Remote Controller Type				L.C.D Wireless
Sleeping Operation					O
Drain Hose					O

Copyright ©2008 LG Electronics. Inc. All right reserved.	- 5 -
Only for training and service purposes	LGE Internal Use Only

	2. LM-1830H2L/M
		Operation		A-Unit + B-Unit		A-Unit	B-Unit	Remarks
	Item	Unit				Only	Only
	Cooling Capacity		Btu/h(kcal/h)	17,000/18,000		8,500/9,000	8,500/9,000	208/230V
	Heating Capacity			17,000/18,000		8,500/9,000	8,500/9,000
	Moisture Removal		/h	2.4		1.2	1.2	at 230V
	Power Source		ø, V, Hz	1Ø, 208/230V, 60Hz
	Air Circulation		/min	Indoor	–	7.0/7.6	7.0/7.6	Cooling/Heating
				Outdoor		42
	Noise Level		dB(A)	Indoor	–	39/37/35	39/37/35	at 230V
	( Hi / Med / Low )			Outdoor		53
	Input	Cooling	W	1,680/1,700		930/950	930/950
		Heating		1,680/1,700		930/950	930/950
	Running	Cooling	A	8.2/7.5		4.5/4.0	4.5/4.0	208/230V
	Current	Heating		8.2/7.5		4.5/4.0	4.5/4.0
	E.E.R.	Cooling	Btu/h.w	10.1/10.6		9.1/9.5	9.1/9.5
	C.O.P.	Heating	-	2.97/3.10		2.68/2.78	2.68/2.78
	Dimensions(W x H x D)		mm	Indoor		802 x 262 x 165
				Outdoor		870 x 655 x 320
	Net. Weight		kg	Indoor		7
				Outdoor		63
	Service Valve		mm(Inch)	Liquid		6.35(1/4")
				Gas		9.52(3/8")
	Refrigerant(R-22)		g	–		780	780	at 7.5m
	Airflow Direction Control(Up & Down)					O
	Remote Controller Type				L.C.D Wireless
	Sleeping Operation					O
	Drain Hose					O

Copyright ©2008 LG Electronics. Inc. All right reserved.	- 6 -
Only for training and service purposes	LGE Internal Use Only

3. LM-2430C2L/M
	Operation		A-Unit + B-Unit		A-Unit	B-Unit	Remarks
Item	Unit				Only	Only
Cooling Capacity		Btu/h(kcal/h)	23,600/24,000		11,800/12,000 11,800/12,000		208/230V
Heating Capacity				–	–	–
Moisture Removal		/h		3.4	1.7	1.7	at 230V
Power Source		ø, V, Hz		1Ø, 208/230V, 60Hz
Air Circulation		/min	Indoor	–	8.0	8.0
			Outdoor		42
Noise Level		dB(A)	Indoor	–	40/38/36	40/38/36	at 230V
( Hi / Med / Low )			Outdoor		54
Input	Cooling	W	2,400/2,400		1,300/1,300	1,300/1,300
	Heating			–	–	–
Running	Cooling	A	11.0/10.0		6.2/5.7	6.2/5.7	208/230V
Current	Heating			–	–	–
E.E.R.	Cooling	Btu/h.w		9.8/10.0	9.1/9.2	9.1/9.2
C.O.P.	Heating	-		–	–	–
Dimensions(W x H x D)		mm	Indoor		888 x 287 x 170
			Outdoor		870 x 655 x 320
Net. Weight		kg	Indoor		7
			Outdoor		61
Service Valve		mm(Inch)	Liquid		6.35(1/4")
			Gas		12.7(1/2")
Refrigerant(R-22)		g		–	880	880	at 7.5m
Airflow Direction Control(Up & Down)					O
Remote Controller Type				L.C.D Wireless
Sleeping Operation					O
Drain Hose					O

Copyright ©2008 LG Electronics. Inc. All right reserved.	- 7 -
Only for training and service purposes	LGE Internal Use Only

	4. LM-2430H2L/M
		Operation		A-Unit + B-Unit		A-Unit	B-Unit	Remarks
	Item	Unit				Only	Only
	Cooling Capacity		Btu/h(kcal/h)	23,600/24,000		11,800/12,000	11,800/12,000	208/230V
	Heating Capacity			23,600/24,000		11,800/12,000	11,800/12,000
	Moisture Removal		/h		3.4	1.7	1.7	at 230V
	Power Source		ø, V, Hz		1Ø, 208/230V, 60Hz
	Air Circulation		/min	Indoor	–	8.0/8.6	8.0/8.6	Cooling/Heating
				Outdoor		42
	Noise Level		dB(A)	Indoor	–	40/38/36	40/38/36	at 230V
	( Hi / Med / Low )			Outdoor		54
	Input	Cooling	W	2,400/2,400		1,300/1,300	1,300/1,300
		Heating		2,400/2,400		1,300/1,300	1,300/1,300
	Runnig	Cooling	A	11.0/10.0		6.2/5.7	6.2/5.7	208/230V
	Current	Heating		11.0/10.0		6.2/5.7	6.2/5.7
	E.E.R.	Cooling	Btu/h.w		9.8/10.0	9.1/9.2	9.1/9.2
	C.O.P.	Heating	-	2.89/2.93		2.66/2.70	2.66/2.70
	Dimensions(W x H x D)		mm	Indoor		888 x 287 x 170
				Outdoor		870 x 655 x 320
	Net. Weight		kg	Indoor		7
				Outdoor		63
	Service Valve		mm(Inch)	Liquid		6.35(1/4)
				Gas		12.7(1/2)
	Refrigerant(R-22)		g		–	880	880	at 7.5m
	Airflow Direction Control(Up & Down)					O
	Remote Controller Type				L.C.D Wireless
	Sleeping Operation					O
	Drain Hose					O

Copyright ©2008 LG Electronics. Inc. All right reserved.	- 8 -
Only for training and service purposes	LGE Internal Use Only

Dimensions

1. Indoor Unit

D

H

W

Installation plate

Left rear piping	Right rear piping
80mm
20mm	20mm
	50mm
ø70mm	ø70mm

( LM-1830C2L/M, LM-1830H2L/M )

Tubing hole cover

Installation plate

Left rear piping	Right rear piping
A	A
Center	Center
A	A
ø70mm	ø70mm

( LM-2430C2L/M, LM-2430H2L/M )

MODEL

LM-1830C2L/M, LM-1830H2L/M

LM-2430C2L/M, LM-2430H2L/M

DIM

W

mm

802

888

H

mm

262

287

D

mm

165

170

W

D

Hanger Hole

H

Pipe Hole	Fix Hole

	Capacity		W	H	D
SP1 Ch.		9K/12K	570	568	137

Copyright ©2008 LG Electronics. Inc. All right reserved.	- 9 -
Only for training and service purposes	LGE Internal Use Only

2. Outdoor Unit

W

								D		L1
								L2

H	L3	L10L10
		L10

				L9
L4	L6	L5	L7	L8

Gas side 3-Way valve

Liquid side 2-Way valve

MODEL

DIM		LM-1830C2L/M, LM-1830H2L/M, LM-2430C2L/M, LM-2430H2L/M,L2-C243AL1
W	mm	870
H	mm	655
D	mm	320
L1	mm	370
L2	mm	25
L3	mm	630
L4	mm	25
L5	mm	546
L6	mm	160
L7	mm	160
L8	mm	64
L9	mm	76.5
L10	mm	50

Copyright ©2008 LG Electronics. Inc. All right reserved.	- 10 -
Only for training and service purposes	LGE Internal Use Only

Refrigeration Cycle Diagram

1. LM-1830C2L/M, LM-2430C2L/M,L2-C243AL1 (Cooling only models)

LIQUID SIDE

CAPILLARY TUBE

	2-WAY VALVE
HEAT		HEAT
EXCHANGER
		EXCHANGER
(EVAPORATOR)
		(CONDENSER)
A-UNIT	B-UNIT	COMPRESSOR
	GAS SIDE	B

3-WAY VALVE

COMPRESSOR A

2. LM-1830H2L/M, LM-2430H2L/M (Cooling & Heating modes)

Indoor Unit		Outdoor Unit
			COOLING
		COMPRESSOR-A	HEATING
			DEICE
	4-WAY
	VALVE
HEAT	3-WAY	COMPRESSOR-B
	VALVE
EXCHANGER
	4-WAY
A-UNIT B-UNIT	VALVE		HEAT
			EXCHANGER
		CAPILLARY TUBE
	2-WAY	CAPILLARY TUBE
	VALVE

	Pipe Size (Diameter : inch)		Max.	Max.	ex)		Capillary
Btu/h			piping length	piping elevation
							Cooling & Deice
	Gas	Liquid	(m)	(m)
18K	3/8"	1/4"	15	8
24K	1/2"	1/4"	15	8

Copyright ©2008 LG Electronics. Inc. All right reserved.	- 11 -
Only for training and service purposes	LGE Internal Use Only

Wiring Diagram

1. INDOOR UNIT: LM-1830C2L/M, LM-1830H2L/M, LM-2430C2L/M, LM-2430H2L/M

MOTOR

CN-POWER CN-MOTOR

		FORCED
	SW01F	OPERATION
		AUTO
		RESTART
		REMOTE
		CONTROL
	-TH	THERMISTOR
	CN
	U/D	STEP
	-	MOTOR
	CN

RD

BK

BR

BL

MAIN PCB ASSY

CN-DISP1

DISPLAY PCB ASSY

C G V S

PILLAR

TERMINAL

INDOOR WIRING DIAGRAM

TO OUTDOOR UNIT	3854A20075M

2.OUTDOOR UNIT

•LM-1830C2L/M

•LM-2430C2L/M

BK

T/B1

BK

MOTOR

BK

BK

OR

YL

CAPACITOR

OR

BK

H

C

F

CAPACITOR

C

BK

C

S

RD

R BR

S

R

"A"

"B"

COMP

COMP

YL

OLP

OLP

BK

BL

TRANS-

RD

FORMER

CN-SV

TRANAS-CN

4

4

RY-FAN1

-RYCOMPA

-RYCOMPB

MAIN DC

3

3

PCB ASSY

FUSE T3.15A

MAIN AC PCB ASSY

CN-POWER

CN-COMP1

CN-COMP2

WH WH

YL

WH

BK

2.5A

BL

2.5A

BK

2.5A

BL

2.5A

BK

FUS250V

FUS250V

FUS250V

FUS250V

GN/YL

BK

RD BK BR BL

OR BK BR BL

PILLAR

C

G

V

S

C

G

V

S

TERMINAL

L1

L2

TO INDOOR UNIT

MAIN

C

G

V

S

C

G

V

S

POWER

RD BK BR BL

RD BK BR BL

	A INDOOR					B INDOOR
OUTDOOR WIRING DIAGRAM								3854A20075L

• LM-1830H2L/M
• LM-2430H2L/M
			BK
BK	T/B1		BK
		MOTOR		BK			BK	BK
	BK
				OR
							-WAY	-WAY
			YL
CAPACITOR				OR	BK		A 4	B 4
	H	C	F		CAPACITOR		BK	BK	THERMISTOR
	OLP	BK	OLP
	RD			R BR
	S	R
	"A"			"B"
	COMP		COMP YL
	C		C	S		BK	BL	YL
TRANS-		BL		RD
FORMER					CN-SV				CN-TH1
	TRANAS-CN
		4		4	RY-FAN1	RY-SV3	RY-SV4
		-RYCOMPA		-RYCOMPB					MAIN DC
		3		3
									PCB ASSY

FUSE T3.15A

MAIN AC PCB ASSY

CN-POWER

CN-COMP1

CN-COMP2

WH WH

YL

WH

BK

2.5A

BL

2.5A

BK

2.5A

BL

2.5A

BK

FUS250V

FUS250V

FUS250V

FUS250V

GN/YL

BK

RD BK BR

BL

OR BK BR BL

PILLAR

C

G

V

S

C

G

V

S

TERMINAL

L1

L2

TO INDOOR UNIT

MAIN

C

G

V

S

C

G

V

S

POWER

RD BK BR BL

RD BK BR BL

A INDOOR

B INDOOR

OUTDOOR WIRING DIAGRAM

3854A20075K

Copyright ©2008 LG Electronics. Inc. All right reserved.	- 12 -
Only for training and service purposes	LGE Internal Use Only

Operation Details

1. MAIN UNIT FUNCTION

• DISPLAY

1) C/O Model

Operation Indicator

•On while in appliance operation, off while in appliance pause

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

Sleep Timer Indicator

• On while in sleep timer mode, off when sleep timer cancel or appliance operation pause

Timer Indicator

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

Comp. Running Incidator

•While in appliance operation, on while in outdoor unit compressor running, off while in compressor off

2)H/P Model

Operation Indicator

•On while in appliance operation, off while in appliance pause

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

Sleep Timer Indicator

• On while in sleep timer mode, off when sleep timer cancel or appliance operation pause

Timer Indicator

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

Defrost Indicator

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

■Cooling Mode Operation

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

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

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

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

■Healthy Dehumidification Mode

•When the dehumidification operation input by the remote control is received, the intake air temperature is

detected and the setting temp is automatically set according to the intake air temperature.

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

Copyright ©2008 LG Electronics. Inc. All right reserved.	- 13 -
Only for training and service purposes	LGE Internal Use Only

•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 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.

■Heating Mode Operation(H/P model)

•When the intake air temp reaches +3°…above the setting temp, the compressor is turned off. When below the setting temp, the compressor is turned on.

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

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

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

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

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

■Defrost Control(H/P model)

•Defrost operation is controlled by timer and sensing temperature of outdoor pipe.

•The first defrost starts only when the outdoor pipe temperature falls below -6°C after 45 minutes passed from starting of heating operation and more than 10 minutes operation of compressor.

•Defrost ends after 9/6 minutes passed from starting of defrost operation or after the outdoor fan operates within max. 2 minutes 30 seconds when the outdoor pipe temperature rises over 12°C even it before 12 minutes.

•The second defrost starts only when the outdoor pipe temperature falls below -6°C after 45 minutes passed from ending of the first defrost and more than 10 minutes operation of compressor.

■Heating overload(H/P models)

•Outdoor fan ON/OFF by sensing outdoor pipe temperature.

•Outdoor fan is OFF if pipe temperature is over 6.5°C and outdoor fan is ON if pipe temperature is below 0°C.

•Outdoor fan is off if any one part is heating overload condition.

Copyright ©2008 LG Electronics. Inc. All right reserved.	- 14 -
Only for training and service purposes	LGE Internal Use Only

■ Fuzzy Operation (C/O Model)

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

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

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

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

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

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

■Fuzzy Operation (H/P Model)

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

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

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

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

1)Fuzzy Operation for Cooling

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

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

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

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

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

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

Copyright ©2008 LG Electronics. Inc. All right reserved.	- 15 -
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2) Fuzzy Operation for Dehumidification

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

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

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

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

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

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

3)Fuzzy Operation for Heating

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

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

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

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

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

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

■Airflow Speed Selection

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

■On-Timer Operation

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

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

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

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■Off-Timer Operation

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

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

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

■Off-Timer <=> On-Timer Operation

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

■Sleep Timer Operation

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

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

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

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

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

■Chaos Swing Mode

•By the Chaos Swing key input, the 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 airflow mode is operated for 2~15 sec. randomly by the Chaos Simulation.

■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 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.

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■Auto Restarting Operation

•When the power is restored after a sudden power failure while in appliance operation, the mode before the power failure is kept on the memory and the appliance automatically operates in the mode on the memory.

•The slide switch on the main unit of the appliance should be on the Auto Restarting position in order that the Auto Restarting operation is available.

•Operation Mode that is kept on the memory

-State of Operation ON/OFF

-Operation Mode/Setting Temp/Selected Airflow Speed

-Sleep Timer Mode/Remaining Time of Sleep Timer (unit of hour)

FORCED

OPERATION

AUTO

RESTART

REMOTE

CONTROL

Slide Switch

■Forced Operation (C/O Model)

•To operate the appliance by force in case that the remote control is lost, the forced operation selection switch is on the main unit of the appliance to operate the appliance in the standard conditions.

•When the power is supplied while the slide switch is on the forced operation position, or when the slide switch position is switched to the Auto Restarting position (or test operation) or switched from the remote control position to the forced operation position while the power is on, the forced operation is carried out.

•When the slide switch position is switched from the forced operation position to the Auto Restarting position or the remote control position, the forced operation is canceled and the appliance stops operating.

•The forced operation is carried out in cooling mode with the setting temperature 22°C and the high speed of airflow.

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

■Forced Operation (H/P Model)

•To operate the appliance by force in case that the remote control is lost, the forced operation selection switch is on the main unit of the appliance to operate the appliance in the standard conditions.

•When the power is supplied while the slide switch is on the forced operation position, or when the slide switch position is switched to the Auto Restarting (or test operation) position or switched from the remote control position to the forced operation position while the power is on, the forced operation is carried out.

•When the slide switch position is switched from the forced operation position to the Auto Restarting position or the remote control position, the forced operation is canceled and the appliance stops operating.

•The forced operation is carried out in cooling mode with the setting temperature 22°C and the high speed of airflow.

•In the forced operation mode, the indoor fan is operated at low speed for around 15 sec and then the operation

condition is set according to the intake air temperature as follows. 24°C≤Intake Air Temp Cooling Mode Operation, 22°C, High Speed

21°C≤Intake Air Temp<24°C Dehumidification Operation, 23°C, High Speed Intake Air Temp<21°C Heating Mode Operation, 24°C, High Speed

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

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■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 cooling cycle operation mode, the compressor and the outdoor fan are turned off in order to protect the indoor evaporator pipe from frosting.

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

■Buzzer Sounding Operation

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

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

•When a key is input by the remote control while the slide switch on the main unit of the appliance is on the forced operation position, the error sound "beep-beep-beep-beep-beep-" is made 10 times to indicate that the remote control signal cannot be received.

Copyright ©2008 LG Electronics. Inc. All right reserved.	- 19 -
Only for training and service purposes	LGE Internal Use Only