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Ceiling Cassette Air Conditioner

SVC MANUAL(Exploded View)

MODEL : LT-H488DLE1

CAUTION

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

Only for authorized service personnel.

1. Specification

Indoor

Indoor Unit Type

Models

Decorative Panel Model

Power Supply

Cooling Capacity

Heating Capacity

Ø / V / Hz kW

Btu/h kW

Btu/h

A Current

Fan

Nominal Running Current

Motor Type

Fan Type

Motor Output(W) x No. of Unit

Air Flow Rate

(H / M / L)

External Static Pressure

Capacitor

Coil

Drive

Row x Column x FPI

Dimensions (W x H x D) Body

Net Weight

Decorative Panel

Body

Decorative Panel

Air Filter

Sound Level (H / M / L / SL)

Piping

Connections

Liquid

Gas

Drain(OD/ID)

Dehumidification Rate

Safety Devices

Temperature Sensor

Referigerant

Referigerant Control

Connectable Outdoor Unit

Power and Transmission Interunit Cable

CMM cfm mmAq

µF / Vac mm(inch) mm(inch) kg (lbs) kg (lbs) dB(A)+3 mm (inch) mm (inch) mm l/h

No. x mm 2

Ceiling Cassette

LTNH488DLE1

PT-HDA1

3/380~415/50

14

47,770

15.2

51,865

0.4

BLDC

Turbo

124*1

31/29/27

1094/1024/953

-

680/400

Direct

2R*12C*19FPI

840*840*288(33.1*33.1*11.3)

950*950*30(37.4*37.4*1.2)

31/68.3)

5(11)

Long Life Filter

45/44/42/41

9.52(3/8)

19.05(3/4)

32/25

2.4

Fuse, Thermal Protector

Thermistor

R22

Capillary Tube

LTUH488DLE1

5* 3.5 ( 5* 0.75)

Note:

1. Capacities are based on the following conditions:

Cooling: - Indoor Temperature 27°C(80.6°F) DB/19°C(66.2°F) WB

- Outdoor Temperature 35°C(95°F) DB/24°C(75.2°F) WB

Heating: - Indoor Temperature 20°C(68°F) DB/15°C(59°F) WB

- Outdoor Temperature 7°C(44.6°F) DB/6°C(42.8°F) WB

Piping Length - Interconnecting Piping Length 7.5m

- Level Difference of Zero

2. Wiring cable size must comply with the applicable local and national code.

3. The specification may be subject to change without prior notice for purpose of improvement.

Conversion Formula kW = Btu/h x 0.0002931

cfm = CMM x 35.3

2 Ceiling Cassette Air Conditioner

Outdoor

Nominal Capacity

(Min~Rating~Max)

Nominal Input

(Min~Rating~Max)

Cooling

Heating

Testing Combination

Running Current(Rating) Cooling

Starting Current

Heating

Cooling/Heating

Power Supply

Power Supply Cable(Outdoor)

Power and Transmission Cable

(Outdoor to Indoor or Outdoor to BD)

Power and Transmission Cable(BD to Indoor)

Dimensions W x H x D

Net Weight

Max. Number of Connectable Indoor Units

Compressor (#1) Type

Qty x Model

Compressor (#2)

Compressor (#3)

Refrigerant

Motor type

Oil charge volume

Oil type

Cycle A Charge (at 7.5m)

Cycle B Charge (at 7.5m)

Type

Control

Additional Refrigerant Charge

Heat Exchanger (Rows x Column x FPI) x No.

Defrosting Method

Fan

Motor type

Oil charge volume

Oil Type

Type

Qty x Model

Motor type

Oil charge volume

Oil type

Type

Qty x Model

Sound Level(H/L)

Piping Connections

Capacitor

Drive

Discharge Direction(Side/Top)

Air Flow RatexNo. of Fan

Sound Pressure

Liquid(Cycle A)

Gas(Cycle A)

Liquid(Cycle B)

Gas(Cycle B)

High Pressure Gas

Max. Interunit

Piping Length

Max. Elevation

Difference

Operation Range

(Outdoor)

Outdoor Unit

Cooling

Heating

Total Piping

Main Piping

Total Branch Piping

Each Branch Piping

Outdoor Unit~Indoor Unit

Indoor Unit~Indoor Unit

Cooling

Heating kW

Btu/h kW

Btu/h kW kW

A

A

A

Ø / V / Hz

No. x mm

No. x mm

No. x mm mm(inch) kg(lbs) cc cc cc g(oz) g(oz) g/m(oz/ft)

µF/Vac

CMM(cfm) dB(A)+3 mm(inch) mm(inch) mm(inch) mm(inch) mm(inch) m m m m m m

°C(°F)

°C(°F)

2

2

2

Note:

1. Capacities are based on the following conditions:

Cooling:

Heating:

- Indoor Temperature 27°C(80.6°F) DB/19°C(66.2°F) WB

- Outdoor Temperature 35°C(95°F) DB/24°C(75.2°F) WB

- Indoor Temperature 20°C(68°F) DB/15°C(59°F) WB

- Outdoor Temperature 7°C(44.6°F) DB/6°C(42.8°F) WB

Piping Length - Interconnecting Piping Length 7.5m

- Level Difference of Zero

2. Wiring cable size must comply with the applicable local and national code.

3. The specification may be subject to change without notic for purpose of improvement.

LTUH488DLE1

14

47,770

15.2

51,865

4.9

4.9

-

8.5

8.7

-

3/380-415/50

5*3.5(Including Earth)

5*0.75(Including Earth)

-

1130*900*370 (44.5 *35.4*14.5)

105(231)

1

SCROLL

1 * SB061YAA

Induction

1,650

SUNISO 4GSI

-

-

-

-

-

-

-

-

-

-

3,700(130.5)

-

R22

Capillary Tube

45(0.48)

(2R*22C*18FPI)*2

Reversing Cycle

6/370-400

Direct

Side

110(3885)

59

9.52(3/8)

19.05(3/4)

-

-

-

50

-

-

-

30

-

21~54

-7~24

Conversion Formula kW = Btu/h x 0.0002931

cfm = CMM x 35.3

Service Manual 3

2. List of Functions

Indoor

Category Function

Air flow

Air Purifier

Installation

Reliability

Convenience

Individual

Control

CAC

Network

Function

Special

Function

Kit

Others

Air Supply Outlet

Airflow Direction Control (left & right)

Airflow Direction Control (up & down)

Auto Swing (left & right)

Auto Swing (up & down)

Airflow Steps(Fan / Cool / Heat)

CHAOS Swing

CHAOS Wind (Auto wind)

Jet Cool (Power Wind)

Swirl Wind

Deodorizing Filter

Plasma Air Purifier

Prefilter(Washable / Anti-Fungus)

Drain Pump

E.S.P. Control

Electric Heater(Operation)

High Ceiling Operation

Hot Start

Self Diagnosis

Soft Dry Operation

Auto Changeover

Auto Cleaning

Auto Operation (Artificial Intelligence)

Auto Restart Operation

Child Lock

Forced Operation

Group Control

Sleep Mode

Timer (On/Off)

Timer (weekly)

Two Thermistor Control

Standard Wired Remote Controller

Deluxe Wired Remote Controller

Simple Wired Remote Controller

Wired Remote Controller(for hotel use)

Wireless Remote Controller(simple)

Wireless LCD Remote Controller

General Central Controller(Non LGAP)

Dry Contact

Network Soluation(LGAP)

PDI(Power Distribution Indicator)

PI485

Zone Control

CTIE

Electro Thermostat

Thermistor

LTNH488DLE1

O

O

O

O

O

O

O

O

O

O

O

-

-

O

O

X

4

-

Auto

X

O

4/5/4

X

O

O

O

X

OPTION

O

O

X

X

X

O

O

X

ACCESSORY(PQWRHSF0)

X

OPTION

O

X

ACCESSORY(PMNFP14A0)

X

X

X

-

Note :

O : Applied, X : Not applied, – : No relation

Option: Model name & price are different according to options, and assembled in factory with main unit.

Accessory: Installed at field, ordered and purchased separately by the corresponding model name, supplied with separate package.

Skip over evaporator sensing means that the function of knock-off to prevent freezing is skipped, when IDU start cooling mode.

4 Ceiling Cassette Air Conditioner

Outdoor

Category

Reliability

Convenience

CAC Network

Function

Special Function Kit

Others

Function

Defrost / Deicing

High Pressure Switch

Low Pressure Switch

Phase protection

Restart Delay (3-minutes)

Self Diagnosis

Soft Start

Test Function

Auto Changeover

Auto Restart Operation

Central control(LGAP)

PDI(Power Distribution Indicator)

PI485

Low Ambient Kit

Thermistor

LTNH488DLE1

O

O

X

O

O

O

X

O

O

O

O

X

X

ACCESSORY

-

Note :

O : Applied, X : Not applied, – : No relation

Option: Model name & price are different according to options, and assembled in factory with main unit.

Accessory: Installed at field, ordered and purchased separately by the corresponding model name, supplied with separate package.

Service Manual 5

3. Piping Diagrams

Indoor Unit

Th1

Th2

Capillary Tube Liquid Side

3-Way Valve

Heat

Exchanger

(Evaporator)

Outdoor Unit

Capillary Tube

Gas Side

3-Way Valve

LOC.

Th1

Th2

Th3

Description

Thermistor for indoor air temperature

Thermistor for evaporating temperature

Thermistor for condensing temperature

Heat

Exchanger

(Condenser)

Th3

Compressor

Reversing Valve

High Pressure S/W

Cooling

Heating

PCB Connector

CN_ROOM

CN_PIPE1

Deice PCB

6 Ceiling Cassette Air Conditioner

4. Wiring Diagrams

Indoor Unit

0.7

CN-POWER CN-DPUMP CN-MOTOR2 CN-FLOAT

CN-ROOM

CN-PIPE1

CN-REMO

CN-VANE2 CN-VANE1 CN-DISP

Service Manual 7

Outdoor Unit

Magnetic

Contactor

Fuse

Fan

Capacitor

8 Ceiling Cassette Air Conditioner

Anti phase

PCB

Deice PCB

Connecting wire Terminal block

Main Power

Terminal Block

5. Exploded View

Indoor Unit

130400

W6640

268711

249951

ROOM

W49810

354211

263230-1

PIPE

349480

552111

352118

330870

330860

158591

Note) * Please ensure GCSC since the replacement parts may be changed depending upon the buyer's request.

Please check the correct parts in View RPL(Replacement Part List) on GCSC.

(GCSC Website http://biz.Lgservice.com,)

Service Manual - 9 -

Please check the service part of front panel by model name(PT-HDA1)

130412

130911-4

352150

267110

130911-1

249310

Note) * Please ensure GCSC since the replacement parts may be changed depending upon the buyer's request.

Please check the correct parts in View RPL(Replacement Part List) on GCSC.

(GCSC Website http://biz.Lgservice.com,)

- 10 - Ceiling Cassette Air Conditioner

346810

359012

130911-2

130911-3

Outdoor Unit

Note) * Please ensure GCSC since the replacement parts may be changed depending upon the buyer's request.

Please check the correct parts in View RPL(Replacement Part List) on GCSC.

(GCSC Website http://biz.Lgservice.com,)

Service Manual - 11 -

P/NO : MFL33061306 FEBRUARY, 2007

P/NO : MFL33061306 AUGUST , 2007