LG LB-F3660HL, LB-F3660CL User Manual

Ceiling Duct Type Air Conditioner

SVC MANUAL(Exploded View)

MODEL : LB-F3660HL

LB-F3660CL

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 Specifications (Cooling & Heating) 5

Dimensions 6

Refrigeration Cycle Diagram 7

Wiring Diagram 9

Operation Details 11

Installation of Indoor, Outdoor Unit 14

Test Running 25

3-way Valve 27

Cycle Troubleshooting Guide 32

Electronic Parts Troubleshooting Guide 33

Electronic Control Device 36

Schematic Diagram 37

Exploded View 38

- 2 -

LGE Internal Use Only

Functions

Room temperature sensor. (Thermistor)

Maintains the room temperature in accordance with the Setting Temp.

Indoor fan is delayed for 5 seconds at the starting.

Restarting is inhibited for approx. 3 minutes.

High, Med, Low

Intermittent operation of fan at low speed.

Both the indoor and outdoor fan stops during defrosting. Hot start after defrost ends.

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

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

Soft Dry Operation Mode

Deice (defrost) control (Heating)

Hot-start Control (Heating)

- 3 -

LGE Internal Use Only

- 4 -

LGE Internal Use Only

Remote Controller

Operation ON/OFF

Operation Mode Selection

Fan Speed Selection

Room Temperature Display

Temperature Setting

Setting the Time or Timer

(Cooling

model only)

(Heating

model only)

(Low) (Med) (High)

Cooling Operation Mode ( ) Heating Operation Mode ( )

Soft Dry Operation Mode ( )

Fan Operation Mode

HIMEDLO

Set

: High:39°C LOW:11°C

: Fan Operates without cooling & heating

Although the air conditioner is turned off by a power failure, it is restarted automatically after a power resupply.

Cooling Heating

Down to 18°C Up to 30°C

Down to 16°C Up to 30°C

✔

- 5 -

LGE Internal Use Only

Product Specifications (Cooling & Heating)

Item

Cooling Capacity Btu/h(kcal/h) 36,000(9,073) 36,000(9,073)

Heating Capacity Btu/h(kcal/h) 36,000(9,073) -

Moisture Removal l/h 5.0

Power Source Ø, V, Hz 1, 220-240, 50

Indoor 37

Outdoor 58

Input Cooling 4,600 4,700

Heating 4,150 -

Running Current Cooling 23 23

Heating 21.5 -

E.E.R. Btu/h-W 7.83 7.66

Indoor 1,180 x 298 x 600

Outdoor 790 x 965 x 320

Indoor 46 46

Outdoor 81 78

Refrigerant (R-22) g 3.4 3.4

Remocon Type L.C.D

Liquid 3/8" (9.52)

Gas 5/8" (15.88)

Drain Hose

Connecting Wire 0.75mm

2

Main Power Cable 5.5mm

2

Time Delay Safety Function

Soft Dry

Fan Speed (Indoor) 3 (Hi, Med, Low)

Timer 24Hrs

Self-Diagnosis

Air Circulation

m3/min

Dimensions (W H D)

Net. Weight

mm

kg

W

A

LB-F3660HL LB-F3660CL

Service Valve & Connecting Tube

Model Name

Unit

- 6 -

LGE Internal Use Only

Dimensions

■ Model:LB-F3660HL/CL

(1) Indoor Unit

790

965

320

1180

600

298

(2) Outdoor Unit

- 7 -

LGE Internal Use Only

Refrigeration Cycle Diagram

■ LB-F3660HL

( Rated performance for refrigerant line length of: 5m)

For installation over rated distance, 70g of refrigerant should be added for each meter.

ex) When installed at a distance of 15m, 700g of refrigerant should be added.

(15-5) x 70g = 700g

Pipe size(Diameter: ø) Piping length(m) Elevation(m)

MODEL

Gas Liquid Rated Max. Rated Max.

LB-F3660HL 5/8" 3/8" 5 25 5 15

INDOOR UNIT OUTDOOR UNIT

HEAT EXCHANGER

COMPRESSOR

GAS SIDE

LIQUID SIDE

COOLING HEATING

REVERSING VALVE

CHECK VALVE

CAPILLARY TUBE

BY PATH CAPILLARY TUBE

- 8 -

LGE Internal Use Only

■ LB-F3660CL

( Rated performance for refrigerant line length of: 5m)

For installation over rated distance, 70g of refrigerant should be added for each meter.

ex) When installed at a distance of 15m, 700g of refrigerant should be added.

(15-5) x 70g = 700g

Pipe size(Diameter: ø) Piping length(m) Elevation(m)

MODEL

Gas Liquid Rated Max. Rated Max.

LB-F3660CL 5/8" 3/8" 5 25 5 15

INDOOR UNIT OUTDOOR UNIT

HEAT EXCHANGER (CONDENSER)

COMPRESSOR

GAS SIDE

LIQUID SIDE

CAPILLARY TUBE

Wiring Diagram

■ Model: LB-F3660HL

(1) Indoor Unit

(2) Outdoor Unit

- 9 -

LGE Internal Use Only

2

6

4

COi

GN/YL

FMi

TRANS

WH

BL

BK

GN/YLGN/YL

RD

OR

CN-TRANS2

PWB ASM

CN-POWER

CN-TRANS1

Hi Med Low

CN-MOTOR

RY-FAN

RY-4WAY

RY-COMP

CN-OUT

1

3

6

DC-12V

SIGNAL

GND

CN-REMO

INDOOR ELECTRIC CIRCUIT

INDOOR UNITOUTDOOR UNIT

(

RD

)

(

YL

)

(

BR

)

P/NO : 3854A20025F

4

5

3

2

78

1TM

220-240V 1Ø, 50Hz

POWER SUPPLY

BK

63H2

52C

L1T1L2

T2

A2

A1

BK

WH

BK

52F1

12

34

56

TNS

NO

C TH

NC

D.P

WH

BK

BLBK

WH

T/B1

F1

BK

WH WH

WH

BR

Co

OR YLCoOR

FMo1

49FMo

FMo2

49FMo

YL

BKBK

BK

BL

WH

GN/YL

23

NL

20SV

BKBKBK

BK

WH

BK

1

NOTE

BL : BLUE BK : BLACK BR : BROWN OR : ORANGE GN/YL : GREEN/YELLOW

RD : RED WH : WHITE YL : YELLOW

Re

CN-TH

EVATHROOM

TH

CH1

BKWHRD

R

C

S

CM

Cr

PTCR

78

1TM

220-240V 1Ø, 50Hz

POWER SUPPLY

BK

63H2

52C

Outdoor Unit Wiring Diagram

L1 L2

T1 T2

A2

A1

BK

WH

BK

52F1

12

34

56

TNS

NO

C TH

NC

D.P

WH

BK

WH

BK WH BL RD

GN/YL

BLBK

YL

WH

T/B1

F1

BK WH WH

WH

Co

OR YLCoOR

FMo1

49FMo

NOTE

BL : BLUE BK : BLACK BR : BROWN OR : ORANGE GN/YL : GREEN/YELLOW

63H2

C TH

20SV

52C

Tmo

HIGH PRESSURE SWITCH FOR HEATING

THERMISTOR FOR PIPE TEMP.

REVERSING COIL

MAGNECTIC CONTACTOR

TERMINAL BLOCK

TM

52F1

Cr

CM

Co

MAIN TERMINAL BLOCK

RELAY FOR FMo

RUN CAPACITOR FOR CM

COMPRESSOR

RUN CAPACITOR FOR FMo

FMo

F1

DP

CH1

OUTDOOR FAN MOTOR

FUSE (250V, 5A)

DEICER PCB

CRANK CASE HEATER FOR CM

P/NO : 3854A20025G

RD : RED WH : WHITE YL : YELLOW

FMo2

49FMo

20SV

YL

BKBK

BR

BK

BL

BK

WH

BK BK

WIRING OF FIELD (CONNECTING WIRE)

GN/YL

Tmo

To the indoor unit

WH

GN/YL

23

LN

1 2 3 4 5 6

CH1

BKWHRD

R

C

S

CM

Cr

PTCR

■ Model: LB-F3660CL

(1) Indoor Unit

(2) Outdoor Unit

- 10 -

LGE Internal Use Only

2

6

COi

GN/YL

FMi

TRANS

WH

BL

BK

GN/YLGN/YL

OR

CN-TRANS2

PWB ASM

CN-POWER

CN-TRANS1

Hi Med Low

CN-MOTOR

RY-FAN

RY-4WAY

RY-COMP

CN-OUT

CN-TH

EVATHROOM

TH

1

3

6

DC-12V

SIGNAL

GND

Re

CN-REMO

INDOOR ELECTRIC CIRCUIT

INDOOR UNITOUTDOOR UNIT

(

RD

)

(

YL

)

(

BR

)

P/NO : 3854A20025H

3

2

1TM

220-240V 1Ø, 50Hz

POWER SUPPLY

BK

52C

L1T1L2

T2

A2

A1

BK

WH

T/B

F1

BK

WH

BK

WH

RD

R

C

S

BR

Co

OR

YLCoOR

FMo1 FMo2

CM

YL

BKBK

BK

BL

BK

WH

GN/YL

23

NL

WH

1

NOTE

BL : BLUE BK : BLACK BR : BROWN OR : ORANGE

RD : RED WH : WHITE

GN/YL : GREEN/YELLOW

CH1

Cr

PTCR

Outdoor Unit Wiring Diagram

NOTE

BL : BLUE BK : BLACK BR : BROWN OR : ORANGE

52C

TMo

Cr

CM

MAGNECTIC CONTACTOR

TERMINAL BLOCK

RUN CAPACITOR FOR CM

COMPRESSOR

TM

FMo

F1

MAIN TERMINAL BLOCK

OUTDOOR FAN MOTOR

FUSE(250V, 5A)

Co

CH1

RUN CAPACITOR FOR FMo

CRANK CASE HEATER FOR CM

P/NO : 3854A20025J

RD : RED WH : WHITE

WIRING OF FIELD (CONNECTING WIRE)

GN/YL : GREEN/YELLOW

1TM

220-240V 1Ø, 50Hz

POWER SUPPLY

BK

52C

L1 L2

T1 T2

A2

A1

BK

WH

BK WH BL

GN/YL

T/B

F1

BK

WH

Co

OR YLCoOR

FMo1 FMo2

YL

BKBK

BR

BK

BL

BK

WH

GN/YL

To the indoor unit

WH

GN/YL 23

LN

TMo

1 2 3 4 5 6

CH1

BKWHRD

R

C

S

CM

Cr

PTCR

- 11 -

LGE Internal Use Only

Operation Details

(1) The function of main control

1. Time Delay safety Control

• 3min The compressor is ceased for 3minutes to balance the pressure in the refrigeration cycle. (Protection of compressor)

• 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 while compress is off. While compressor is running, it takes 3~5 seconds to switch.

2. Soft-Dry Operation

• The indoor fan speed is automatically set to the low, so the shift of the indoor fan speed is impossible because of

already being set to the best speed for Dry Operation by Micom Control.

3. Cooling Mode Operation

• When selecting the Cooling( ) Mode Operation, the unit will operate according to the setting by the remote con-

troller and the operation diagram is as following

Intake Air temp.

COMP. ON (SET TEMP.+0.5°C)

COMP. OFF (SET TEMP. -0.5°C) More than More than

3 minutes 3 minutes

Selecting Selecting Selecting

fan speed fan speed fan speed

COMPRESSOR ON OFF ON OFF ON

INDOOR FAN Low Low

- 12 -

LGE Internal Use Only

Intake Air temp.

Setting temp.+3°C

(Compressor OFF)

Setting temp. (Compressor ON)

INDOOR FAN Low OFF Low Low OFF

COMPRESSOR ON OFF ON OFF

A point; While the indoor Heat-Exchanger temperature is higher than 40°C fan operates at low speed, when

it becomes lower than 40˚C fan stops.

B point; When the indoor Heat-Exchanger temperature is higher than 42°C, fan operates at seleted fan

speed, when it becomes lower than 39°C, the fan operates at low speed.

4. Heating Mode Operation (Except Cooling Model)

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

Hot Start

Low

Selecting

Fan Speed

minimum 3min

Selecting fan

speed

minimum

10sec.

1min

AA

minimum

10sec.

B

5. Hot-Start Control

The indoor fan stops until the evaporator piping temperature will be reached to 31°C.

The operation diagram is as following.

PIPING TEMPERATURE

1min

COMPRESSOR

INDOOR FAN

ON

28°C

: Selected Fan : Low Fan : Fan Stop

31°C

6. Defrost Control

• Defrost operation is controlled by timer and sensing the outdoor piping temperature.

• The defrost starts only when the outdoor pipe temperature falls below -6°C after 45 minutes passed from starting

of heating operation.

• Defrost ends after 10 minutes passed from starting of defrost operation or when the outdoor pipe temperature rises over 12°C even if before 10 minutes.

7. 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 should be on the automatically operates in the mode on the memory.

• Operation Mode that is kept on the memory

- State of Operation ON/OFF

- Operation Mode/Setting Temp/Selected Airflow Speed

• If no input by the remote controller within 7 hr after the appliance operates by the Auto Restarting operation, the appliance is forced to stop at the moment of 7-hr elapse.

8. Self-Diagnosis Function

• 'CHECK' will flash in the remote controller display when a problem occurs. Then please contact your dealer.

• Correct the accident point as shown in the table below before restarting operation.

• During the normal operation 'CHECK' won't be displayed in the remote controller.

- 13 -

LGE Internal Use Only

More than 45 minutes of

heating operation

Outdoor Pipe Temp.

Indoor Fan

Compressor

4-Way Valve

ON

OFF

ON

OFF

HOT-

START

ON

ON OFF OFFON

12°C

(Defrost OFF)

-6°C

(Defrost ON)

Within

10 minutes

Defrost

More than 45 minutes of

heating operation

Remote controller LCD Accident Point

F1 Indoor temperature thermistor error

F2 Indoor piping thermistor error

F3 Indoor/Outdoor unit communication error

LG LB-F3660HL, LB-F3660CL User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual