LG LB-H2460CL, LB-H1860CL, LB-H1860HP, LB-H2460HP, LB-H2460BL Service Manual

Ceiling Duct Type Air Conditioner

SVC MANUAL(Exploded View)

MODEL : LB-H1860HL/CL/HP/AL LB-H1861BL LB-H2460HL/CL/HP/BL/AL LB-H2461BL LB-G3680HL/CL/HP/BL/BS/AL

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

Model number Nomenclature..................................................................................................3

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

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

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

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

Wiring Diagram ......................................................................................................................12

Operation Details ...................................................................................................................15

Installation of Indoor, Outdoor Unit .....................................................................................18

3-way Valve ............................................................................................................................35

Cycle........................................................................................................................................40

Cycle Troubleshooting Guide ...............................................................................................43

Electronic Parts Troubleshooting Guide .............................................................................44

Electronic Control Device .....................................................................................................47

Exploded View ........................................................................................................................48

- 2 -

LGE Internal Use Only

Model Number Nomenclature

- 3 -

LGE Internal Use Only

12

LB

Code Type Code of Model Meaning

1 Producing Center/ A~Z

L: ChangWon R22, A: ChangWon R410A, C: ChangWon R407C

Refrigerant

2 Type of Air conditioner A~Z B: Ceiling Duct Type Air conditioner

3 Chassis A~Z Name of tool of unit ex) H : BH chassis

4,5 Capacity(Btu/h) 1~9 Cooling/Heating Capacity

Ex. "18" ➔ 18,000Btu/h

6 Electric Range 1~9 Electric Standard [V/Hz/Phase]

1 : 115/60/1 2 : 220/60/1 3 : 208-230/60/1 5 : 200-220/50/1 6 : 220-240/50/1 7 : 100/50(60)/1 8 : 380-415/50/3 9 : 380/60/3 B : 208-230/60/3

7 Serial No. 0~9

8 Heating/Cooling/Fin Type A~Z

9 Option A~Z

ex)

-

Basic Heat Pump H Basic Cooling only C Gold Fin Heat Pump B Gold Fin Cooling only A

Basic L Plasma Air Purifier A Drain Pump P High/Low Pressure Switch S Low Static Motor G

3456789

H1860HL

LB-H1860HL

Basic

Heat Pump Basic Fin(PCM)

0 Series

220-240V/50Hz/1Ø

18,000 Btu

H chassis

LG Changwon R22 Ceiling Duct Type Air conditioner

- 4 -

LGE Internal Use Only

Functions

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

Auto Operation(Auto Change Over)

Deice (defrost) control (Heating)

Auto Restart

Hot-start Control (Heating)

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

High head height Drain pump(Optional)

• A standard drain-head height of up to 700mm is possible.

Central Control(Optional)

•

It is operating individually or totally by central control function.

Group Control(Optional Wiring)

Phase Control

PLASMA (Optional)

Telephone Control Operation (Optional)

•

Each controller can control 16 units and 8 controllers can connect.

•

It operates maximum 16 units by only one wired remote controller and each unit starts random to prevent overcurrent.

• 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.

• Although the air-conditioner is turned off by a power failure, it is restarted automati-

cally previous operation mode after power supply.

• Fan speed is varied according to the state of dampers by micom.

• 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.

• The function will be operated while in any operation mode wigh selecting the function.

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

• The setting temperature and desired operation mode are auto-

matically set by fuzzy rule.

• Both the indoor and outdoor fan stops during defrosting.

• Hot start after defrost ends.

- 5 -

LGE Internal Use Only

Remote Controller

Operation ON/OFF

Operation Mode Selection

Fan Speed Selection

Room Temperature Display

Temperature Setting

Setting the Timer

Weekly Program

(Cooling

model only)

(Heating

model only)

(Low) (Med) (High)

Cooling Operation Mode ( ) Heating Operation Mode ( ) Auto Operation Mode ( )

Soft Dry Operation Mode ( )

Fan Operation Mode

Phase Control Setting

HIMEDLO

Program Holiday

SET/CLR

MinHour

Week

Timer CancelTimer Cancel

Timer

: High:39°C ↔ LOW:11°C

: Fan Operates without cooling & heating

Cooling Heating

Down to 18°C Up to 30°C

Down to 16°C Up to 30°C

- 6 -

LGE Internal Use Only

Product Specifications (Cooling & Heating)

Power Source Ø, V, Hz"

Cooling Capacity kcal/h(BTU/h)

W

Input W

Heating Capacity kcal/h(BTU/h)

W

Input W

Rated Load Amp. Cooling A

Heating A

Air Volumn Cooling(H/M/L)

CMM(m

3

/min)

Heating(H/M/L)

Refrigerant(R-22) g

Drain Hose In. Dia mm

Main Cable

No. X mm

2

Connecting Cable

Remote Control Type

Refigerant Control Type

Fuction Soft Dry

Timer

Self Diagnosis

Deice Operation

Hot Start

Zone Control(Optional)

Central Control(Optional)

Group Control(Optional wiring)

Weekly Programning

Thermistor

Drain Pump

Auto changeover(Auto Operation: CL)

Stand-by Consumption 0

Phase Control

Tele Control(Optional)

PLASMA(Optional)

Connecting Pipe Liquid Inch

Gas (mm)

Dimension Indoor mm

Outdoor (WxDxH)

Net Indoor Kg Weight

Outdoor

1, 220-240, 50 1, 220-240, 50 1, 220-240, 50 1, 220-240, 50

4,536(18,000) 4,536(18,000) 6,048(24,000) 6,048(24,000)

5,274 5,274 7,033 7,033

2,000 2,000 2,650 2,850

4,536(18,000) - 6,048(24,000) -

5,274 - 7,033 -

1,880 - 2,400 -

10 10 12.5 13

9.5 - 11.5 -

16.5/14.5/13 16.5/14.5/13 18/16.5/14 18/16.5/14

16.5/14.5/13 - 18/16.5/14 -

1,300 1,700 1,920 1,920

22.6 22.6 22.6 22.6

3*2.5 3*2.5 3*2.5 3*2.5

6*0.75 4*0.75 6*0.75 4*0.75

L.C.D Wired L.C.D Wired L.C.D Wired L.C.D Wired

Capillary type Capillary type Capillary type Capillary type

Ye s Ye s Ye s Ye s

24 Hours On/Off 24 Hours On/Off 24 Hours On/Off 24 Hours On/Off

Ye s Ye s Ye s Ye s

Ye s - Ye s -

Optional Optional Optional Optional

Ye s Ye s Ye s Ye s

Optional Optional Optional Optional

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

5/8(15.88) 5/8(15.88) 5/8(15.88) 5/8(15.88)

880*450*260 880*450*260 880*450*260 880*450*260

870*320*655 870*320*655 870*320*655 870*320*655

34 34 35 35

57 57 60 60

Model

LB-H1860HL/HP LB-H1860CL LB-H2460HL/HP LB-H2460CL/AL

- 7 -

LGE Internal Use Only

Power Source Ø, V, Hz"

Cooling Capacity kcal/h(BTU/h)

W

Input W

Heating Capacity kcal/h(BTU/h)

W

Input W

Rated Load Amp. Cooling A

Heating A

Air Volumn Cooling(H/M/L)

CMM(m

3

/min)

Heating(H/M/L)

Refrigerant(R-22) g

Drain Hose In. Dia mm

Main Cable

No. X mm

2

Connecting Cable

Remote Control Type

Refigerant Control Type

Fuction Soft Dry

Timer

Self Diagnosis

Deice Operation

Hot Start

Zone Control(Optional)

Central Control(Optional)

Group Control(Optional wiring)

Weekly Programning

Thermistor

Drain Pump

Auto changeover(Auto Operation: CL)

Stand-by Consumption 0

Phase Control

Tele Control(Optional)

PLASMA(Optional)

Connecting Pipe Liquid Inch

Gas (mm)

Dimension Indoor mm

Outdoor (WxDxH)

Net Indoor Kg Weight

Outdoor

1, 220-240, 50 1, 220-240, 50 3, 380-415, 50 3,380-415, 50

4,536(18,000) 6,048(24,000) 9,072(36,000) 9,072(36,000)

5,274 7,033 10,548 10,548

2,000 2650 4,000 4,000

4,536(18,000) 6,048(24,000) 9,072(36,000) -

5,274 7,033 10,548 -

1,880 2,400 3,300 -

10 12.5 7.2 7.2

9.5 11.5 6.3 -

16.5/14.5/13 18/16.5/14 32/29/26 32/29/26

16.5/14.5/13 18/16.5/14 32/29/26 -

1,300 1,920 1,840 1,800

22.6 22.6 22.6 22.6

3*2.5 3*2.5 4*2.5 4*2.5

6*0.75 6*0.75 5*0.75 4*0.75

L.C.D Wired L.C.D Wired L.C.D Wired L.C.D Wired

Capillary type Capillary type Capillary type Capillary type

Ye s Ye s Ye s Ye s

24 Hours On/Off 24 Hours On/Off 24 Hours On/Off 24 Hours On/Off

Ye s Ye s Ye s Ye s

Ye s - Ye s -

Optional Optional Optional Optional

Ye s Ye s Ye s Ye s

Optional Optional Optional Optional

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

5/8(15.88) 5/8(15.88) 5/8(15.88) 5/8(15.88)

880*450*260 880*450*260 1180*450*298 1180*450*298

870*320*655 870*320*655 870*320*800 870*320*800

34 35 38 38

57 60 72 72

Model

LB-H1861BL LB-H2461BL

LB-G3680HL/HP/BS/BL

LB-G3680CL/AL

- 8 -

LGE Internal Use Only

Dimensions

W

H

D

(1) Indoor Unit

MODEL

DIM

W(mm) 880 880 1180

H(mm) 260 260 298

D(mm) 450 450 450

18K 24K 36K

- 9 -

LGE Internal Use Only

(2) Outdoor Unit

H

W

D

(18K/24K/36K)

MODEL

DIM

W(mm) 870 870 870

H(mm) 655 655 800

D(mm) 320 320 320

18K 24K 36K

- 10 -

LGE Internal Use Only

Refrigeration Cycle Diagram

•

HEAT PUMP

(LB-H1860HL/HP, LB-H1861BL, LB-H2460HL/HP/BL, LB-H2461BL,

LB-G3680HL/HP/BL/BS)

• Rated performance for refrigerant line length of: 7.5m

• If 18K Model is installed at a distance of 15m, 255g of refrigerant should be added (15-7.5)x30g=225g

INDOOR UNIT OUTDOOR UNIT

HEAT EXCHANGER

COMPRESSOR

GAS SIDE

LIQUID SIDE

COOLING HEATING

REVERSING VALVE

CAPILLARY TUBE

18K 5/8" 1/4" 7.5 50 5 30 30 24K 5/8" 1/4" 7.5 50 5 30 35 36K 5/8" 1/4" 7.5 50 5 30 45

*Additional

refrigerant

(g/m)

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

MODEL

Gas Liquid Rated Max. Rated Max.

- 11 -

LGE Internal Use Only

• COOLING ONLY (LB-H1860CL, LB-H2460CL/AL, LB-G3680CL/AL)

• Rated performance for refrigerant line length of: .7.5m

• If 18K Model is installed at a distance of 15m, 225g of refrigerant should be added (15-7.5)x30g=225g

INDOOR UNIT OUTDOOR UNIT

HEAT EXCHANGER (CONDENSER)

COMPRESSOR

GAS SIDE

LIQUID SIDE

CAPILLARY TUBE

LB-H1860CL 5/8" 1/4" 7.5 50 5 30 30 LB-H2460CL 5/8" 1/4" 7.5 50 5 30 35 LB-G3680CL 5/8" 1/4" 7.5 50 5 30 45

*Additional

refrigerant

(g/m)

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

MODEL

Gas Liquid Rated Max. Rated Max.

- 12 -

LGE Internal Use Only

Wiring Diagram

HEAT PUMP

Model : LB-H1860HL/HP, LB-H2460HL/HP, LB-H1861BL, LB-H2461BL

COOLING ONLY

Model : LB-H1860CL, LB-H2460CL/AL

OUTDOOR WIRING DIAGRAM INDOOR WIRING DIAGRAM

3854A20166E

INDOOR MOTOR

DRAIN PUMP

BL

BK BK

YL

BK

RD

BL

BR

GN/YL

YL

OR

BL

BK

GN/YL

COMP

4 WAY

VENT

OUT FAN

FUSE

250V 3.15A

TEMP.

THERMISTOR

PIPE

THERMISTOR

FLOAT S/W

REMOTE

CONTROL

ZONE

CONTROL

TERMINAL

BLOCK

TO OUTDOOR UNIT

3(L) 4(N) 5 6 7

TRIAC

A/CL UNIT

OPTION

VENTILATOR

T/B

OUTDOOR WIRING DIAGRAM INDOOR WIRING DIAGRAM

- 13 -

LGE Internal Use Only

HEAT PUMP

Model : LB-G3680HL

COOLING ONLY

Model : LB-G3680CL

OUTDOOR WIRING DIAGRAM INDOOR WIRING DIAGRAM

- 14 -

LGE Internal Use Only

HEAT PUMP

Model : LB-G3680BS

COOLING ONLY

Model : LB-G3680CL/AL.ANW8DXT

OUTDOOR WIRING DIAGRAM INDOOR WIRING DIAGRAM

- 15 -

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 controller and the operation diagram is as following.

Intake Air temp.

SET TEMP.+0.5°C (COMP. ON)

SET TEMP. -0.5°C (COMP. OFF) 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

- 16 -

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

- 17 -

LGE Internal Use Only

6. Defrost Control(36K)

• Defrost control is availavle 45 minutes later since heating mode operation started, and it will not prolong over 10 minutes.

• Defrost control is carried out when the outdoor pipe temp. falls below -6°C for more than 3 minutes 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 temp. rises over 12°C after 5 minutes passed from starting of defrost.

■ Defrost Control (New Type Defrost Control) (18K/24K)

• 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.

• Defrost control is available 45 min. later since heating mode operation started, and it will not prolong over 10 min.

• Defrost control is carried out according to the following priority order while in heating mode operation.

1st priority : Defrost control is carried out according to the indoor pipe temp 60 min. later since heating mode opera-

tion started.

2nd priority : The temp differences between the indoor pipe temp and the intake air temp 25 min. later(∆T1) and 45

min. later (∆T2) since heating mode operation started are measured, then defrost control is carried out according to the dirrerence (∆T=∆T1-∆T2)

3rd priority : Defrost control is carried out according to the temp dirrerence (E=TE1-TE2) between the indoor pipe

temperatures of 25 min later(TE1) and 45 min later (TE2) after heating mode operation started.

• When the indoor pipe temp is 41°C or above, defrost control is not carried out even if the condition is one of the 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.

7. 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.

Remote controller LCD Accident Point

CH 01 Indoor room temperature thermistor error

CH 02 Indoor piping thermistor error

CH 03

Indoor main body / Remote controller unit communication error

CH 04(Optional) Water level float switch error

More than 45 minutes

of heating operation

Within

9min. 45sec.

ON OFF

ON ON

ON

ON OFF

OFF

COMPRESSOR

4-WAY VALVE

INDOOR FAN

-6°C ON

12°C OFF

The outdoor

piping Temp.

ON

More than 10 min.

running of compressor

More than 45 minutes

of heating operation

5sec.

HOT-

START

ON

- 18 -

LGE Internal Use Only

Installation of Indoor, Outdoor Unit

1. Selection of the best location

1) Indoor unit

Select location

Install the air conditioner in the location that satisfies the following conditions.

• The place shall easily bear a load exceeding four times the indoor unit’s weight.

• The place shall be able to inspect the unit as the figure.

• The place where the unit shall be leveled.

• The place shall allow easy water drainage.(Suit-

able dimension “H” is necessary to get a slope to drain as figure.)

• The place shall easily connect with the outdoor unit.

• The place where the unit is not affected by an electrical noise.

• The place where air circulation in the room will be good .

• There should not be any heat source or steam near the unit

2) Outdoor unit

• If an awning is built over the unit to prevent direct sunlight or rain exposure, be careful that heat radiation from the condenser is not restricted.

• There should not be any animals or plants which could be affected by hot air discharged.

• Ensure the spaces indicated by arrows from the wall, ceiling, fence or other obstacles.

3) Piping length and the elevation

Indoor unit

Outdoor unit

B

A

More than 30cm

More than 70cm

Sunroof

Fence or

obstacles

H

600600

Top view

(unit: mm)

Front view

Front

Inspection hole

(600X600)

Control box

1000

• If 18K Model is installed at a distance of 15m, 225g of refrigerant should be added (15-7.5) x 30g = 225g

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

• Improper refrigerant charge may result in abnormal cycle.

18K BTU/h

30 35 45

36K BTU/h

Capacity

Gas 5/8" 5/8"

5/8"

Liquid

1/4" 1/4" 1/4"

Elevation B(m)

Length A(m)

*Additional

refrigerant

(g/m)

Pipe Size

(Diameter: Ø)

Standard

7.5

Standard

5 5 5

Max.

50 50 50

Max.

30 30 30

24K BTU/h

LG LB-H2460CL, LB-H1860CL, LB-H1860HP, LB-H2460HP, LB-H2460BL Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual