LG LS-J0761NL User manual

Room Air Conditioner

SVC MANUAL(Exploded View)

MODEL : LS-J0761NL/NM/NN

LS-J0962NL/NM/NN/YL

LS-L1261NL/NM/NN

LS-K1860NL/NM/NN/YL

LS-K1861YL

LS-K18612L

CAUTION

Before Servicing the unit, read the safety precautions in General SVC manual.

Only for authorized service personnel.

Internal Use Only

http://biz.lgservice.com

Contents

Functions .................................................................................................................................3

Product Specification (Cooling & Heating)...........................................................................6

Dimensions..............................................................................................................................7

Refrigeration Cycle Diagram..................................................................................................9

Wiring Diagram......................................................................................................................10

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

Installation .............................................................................................................................27

Operation ...............................................................................................................................41

Disassembly of the parts (Indoor Unit) ...............................................................................43

2-way, 3-way Valve.................................................................................................................46

Cycle Troubleshooting Guide...............................................................................................53

Self-diagnosis function.........................................................................................................54

Electronic Parts Troubleshooting Guide.............................................................................56

Electronic Control Device.....................................................................................................67

Schematic Diagram ...............................................................................................................73

Exploded View ......................................................................................................................78

- 2 -

Only for training and service purposes LGE Internal Use Only

- 3 -

Only for training and service purposes LGE Internal Use Only

Functions

• Room temperature sensor. (Thermistor)

• Pipe temperature sensor. (Thermistor)

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

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

• Restarting is for approx. 2 minutes.

• Super High, High, Med, Low

--- Lights up in operation

--- Lights up in Sleep Mode

--- Lights up in Timer Mode

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

• Intermittent operation of fan at low speed.

• The fan is switched to low(Cooling), low(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 the 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 defrosting.

• The indoor fan stops until the

evaporator pipe temperature will be

reached at 30°C.

Sleep Mode Auto Control

Natural Air Control by CHAOS Logic

Airflow Direction Control

Defrost(Deice) control (Heating)

Hot-start Control (Heating)

- 4 -

Only for training and service purposes LGE Internal Use Only

• If power is on, it will operate to chage capacitor (330µF/450WV) on controller and power relay will oper-

ate after about 2~5sec.

• If outdoor temp. is below 0°C, preheater is operating for 1~5min.

• At the initial, It will be operated compressor after 1min. for preheating.

• The active power filter is designed to correct power factor(cos θ) and to regulate DC link voltage.

• It will be operated PFC circuit when the compressor freq. is over 12Hz.

• If DC link voltage is not over DC 350V in 6 sec. in case of PFC on, it does not operating of compressor.

• The final operating freq. of comp. is set the lowest freq. that limited outdoor temp., discharge pipe temp.,

heat-sink temp., target freq., owing to CT.

• When the temp. of power module increases to 85°C, controller decreases Freq. of Comp.

• It will be changed the drive freq. of comp. according to temp. of indoor and outdoor.

• It will be changed the drive voltage of comp. according to operating frequency.

• It is only operated in the heating operation mode except defrosting operation.

• High speed

- Although fan motor speed is low, it will change high speed in case of below AC193V, over 45°C of out-

door temp., and over fc, fh of comp. Freq.

• Low speed

- Nomal mode and over AC270V

Outdoor Unit

Power relay control

Stand by control at low temp.

Active power filter control(PFC)

Comp. Freq. control

Overheatng. Protection(Power module)

Freq. speed control(up/down speed)

V/F control

Total current control (over current protection)

DC peak current control

4 way valve control

Outdoor fan motor control

Discharge pipe temp. control

- 5 -

Only for training and service purposes LGE Internal Use Only

Healthy Dehumidification Operation Mode.

( )

Remote Controller

Operation ON/OFF

Reset

Operation Mode Selection

Temperature Setting

Timer Selection

Timer Setting

Jet Cool

Timer Cancel

Sleep Operation

Airflow Direction Control

(Heating

model only)

TEMPERATURE LOW HIGH

Cooling Operation Mode.( )

Heating Operation Mode.( )

Auto Operation Mode.( )

Fan Operation Mode

Room, Temperature Display

Setting the Time or Timer

ON OFF

SET

CANCEL

Fan Speed Selection

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

: (High: 30°C LOW : 18°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.

Down to 16°C

Up to 30°C

Heating

- 6 -

Only for training and service purposes LGE Internal Use Only

18K Series

LS-K1861YL

LS-K1860NL/YL

LS-K181N-1

LS-K18612L

7K Series 9K Series 12K Series

Cooling Capacity Btu/h

Heating Capacity

Moisture Removal l/h

Power Source Ø, V, Hz

Air Circulation Indoor m3/min

Outdoor

Noise Level Indoor dB (A)±3

Outdoor

Input Cooling W

Heating

Running Cooling A

Current Heating

Motor Output Indoor W

Outdoor

Dimensions Indoor mm

(W x H x D) Outdoor

Net. Weight Indoor kg

Outdoor

Refrigerant (R22) g

Airflow Direction Control (Up & Down)

Remocon Type

Service Valve Liquid inch(mm)

Gas

Sleeping Operation

Drain Hose

Connecting Cable mm

Power Cord mm

at 230V at 230V at 230V at 230V

7,000(4,700-8,300) 9,000(5,200-9,700) 12,000(7,500-13,200) 18,000(11,000-19,800) 17,500(11,000-19,800)

9,000(5,000-10,000) 11,250(4,600-12,500) 14,400(8,300-15,900) 27,700(12,800-22,770) 19,700(12,800-22,770)

1 1.1 1.3 2.5

1Ø, 220-240V, 50Hz

5.6 6.5 8.6 12

25 25 25 42

33 36 39 42

50 50 51 56

740 1,070 1,280 2,000

980 1,300 1,580 2,200

3.3 4.8 5.8 9.0

4.4 6 7 9.5

7.5 7.5 13 20

35.8 35.8 35.8 62

802*262*165 802*262*165 888*287*170 1,080*314*181

801*555*262 870*655*320

779 15

33 35 41 54

530 650 980 1,250

L.C.D Wireless

1/4''(6.35) 1/4''(6.35)

3/8''(9.52) 1/2''(12.7)

1 1.5 2.5

Product Specifications (Cooling & Heating)

Model Name

UnitItem

- 7 -

Only for training and service purposes LGE Internal Use Only

Dimensions

(1) Indoor Unit

Tubing hole cover

Installation plate

Tubing hole cover

Installation plate

Right rear piping

Left rear piping

ø70mm ø70mm

50mm

20mm

80mm

ø70mm

Center

Right rear pipingLeft rear piping

Center

ø70mm

Tubing hole cover

Installation plate

"D" "C"

Right rear pipingLeft rear piping

Hole center ø70mm

MODEL

DIM Unit

W mm 802 888 1,080

H mm 262 287 314

D mm 165 170 181

7k, 9k Btu Series 12k Btu Series 18k Btu Series

(7k, 9k, 12k, 18k )

( 7k, 9k ) ( 12k ) ( 18k )

- 8 -

Only for training and service purposes LGE Internal Use Only

(2) Outdoor Unit

L5L6 L7 L8

L9 L10

Liquid side

2-way valve

Gas side

3-way valve

MODEL 7k, 9k, 12k Btu/h Series 18k Btu/h Series

DIM unit

W mm 801 870

H mm 555 655

D mm 262 320

L1 mm 339 370

L2 mm 37 25

L3 mm 543.6 630

L4 mm 11.4 25

L5 mm 591 546

L6 mm 105 162

L7 mm 105 162

L8 mm 72.5 54

L9 mm 86.4 79

L10 mm 77 74.5

Pipe size(Diameter:Ø)MAX. Max

MODEL Piping length Elevation

Gas(inch) Liquid(inch) (m) (m)

Refrigeration Cycle Diagram

- 9 -

Only for training and service purposes LGE Internal Use Only

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

COOLING

HEATING

REVERSING

VALVE

(Heating Model Only)

7k, 9k Btu SERIES 3/8" 1/4" 15 7

12k Btu SERIES 1/2" 1/4" 15 7

18k Btu SERIES 1/2" 1/4" 30 15

- 10 -

Only for training and service purposes LGE Internal Use Only

Wiring Diagram

SW01FCN-TH1

FUSE 2A,250V

P/NO:3854A90014E

RY-POWER

SW01FCN-TH1

FUSE 2A, T250V

P/NO:3854A20080P

RY-POWER

BK BK

LIMIT

S/W

CN-L/R

STEP

MOTOR

H.V.B A/CL

OPTION

BK BK

CN-MOTOR

CN-OUT

CN-DATA

SW01FCN-TH1

FUSE 2A,250V

P/NO:3854A20080A

RY-POWER

CN-DISP1

DISPLAY PCB ASM

GN/YLGN/YL

TERMINAL

BLOCK

(

)

(

)

(1) Indoor Unit

LS-_NL Series (7, 9, 12K Btu) LS-_NM/NN Series (7, 9, 12K Btu)

LS-_NL/NM/NN Series (18K Btu)

LS-K18612L

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