LG LUU426HV Owner's manual

Brand: LG

Model: LUU426HV

Category: Hardware cooling accessories

Type: Owner's manual

Air Conditioner

SVC MANUAL(Exploded View)

MODEL : AUUW423E [LUU426HV]

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

- 2 -

Only for training and service purposes

LGE Internal Use Only

1. Specification

Nominal Capacity Cooling Btu/h

(Min~Rating~Max) Heating Btu/h

Nominal Input Cooling kW

(Min~Rating~Max) Heating kW

Nominal Capacity Cooling Btu/h

(Min~Rating~Max) Heating Btu/h

Nominal Input Cooling kW

(Min~Rating~Max) Heating kW

Indoor Unit

ATNH423MLAD

APNH423TLAD

42,000

44,000

4.24

4.31

42,000

44,000

4.67

4.63

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 notic for purpose

of improvement.

Indoor Unit

Outdoor Unit

Compressor Type

Refrigerant Charge Charge* g(oz)

Type

Fan Discharge Side/Top

Noise Level(H/L) Sound Press,1m dB(A)±3

Dimensions W*H*D mm (inch)

Net Weight Outdoor kg(lbs)

Piping connections Liquid mm (inch)

Gas mm (inch)

Power Supply Cable(Includes earth) No.*AWG

Interunit Cable(Includes earth) No.*AWG

Max. Piping Length/Elevation m(ft)

Power Supply Ø,V,Hz

Running Current Cooling/Heating A

Air Circulation CMM(CFM)

Additional Refrigerant Charge (Over 7.5m) g/m(oz/ft)

Operation Range Cooling °C(°F)

Heating °C(°F)

Indoor Unit

AUUW423E [LUU426HV]

Rotary

3600(127)

R410A

side

950*1380*330 (37.4*54.3*13.0)

103(227)

9.52 (3/8)

15.88 (5/8)

No.*10

No.*18

50(164)/30(98)

1, 208~230, 60

17.7/16.7

55(1942) X 2

40(0.43)

-10(14) ~ 43(109.4)

-15(5) ~ 24(75.2)

2. Function Table

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.

Defrost / Deicing

High pressure switch

Low pressure switch

Reliability Phase protection

Restart delay (3-minutes)

Self diagnosis

Soft start

Test function

Convenience Auto operation(Artificial intelligence)

Auto restart operation

CAC network

Network soluation(LGAP)

function

PDI(Power Distribution Indicator)

PI485

Special

Low ambient operation

function kit

Others Thermistor

FunctionCategory

AUUW423E

(program logic)

- 3 -

Only for training and service purposes

LGE Internal Use Only

- 4 -

Only for training and service purposes

LGE Internal Use Only

3. Piping Diagrams

Th1

E.E.V.

Accumulator

Inverter

Compressor

Heat

High Pressure

S/W

Exchanger

Reversing

Valve

OUTDOOR UNIT

Refrigerant Flow

Cooling

Heating

Gas

(Ø 15.88mm)

Liquid

(

9.52mm)

Field Piping

Th2

Th4

Th3

Th5

LOC. Description PCB Connector

EEV Electronic Expansion Valve CN-EEV1

Th1 Thermistor for suction pipe temperature CN-TH2

Th2 Thermistor for discharge pipe temperature CN-TH2

Th3 Thermistor for condenser pipe temperature CN-TH1

Th4 Thermistor for outdoor air temperature CN-TH1

Th5 Thermistor for condenser middle pipe temperature CN-TH3

INVERTER PCB ASSY

MAIN PCB ASSY

CN_ POWER

CN-

MOTOR2

CN-

MOTOR1

CN(N) CN(L)

CN-

MAIN(COM)

CN_H/PRESS

CN_C/FAN

CN_4WAY

CN_POWER

CENTRAL

CONTROLLER

POWER SUPPLY

CN_COMM

CN_FLASH

CN_WRITER

CN_TH3

CN_TH2

CN_TH1

CN_CENTRAL

CN_JIG_PC

CN_COM(INV)

CN_EEV1

- 5 -

Only for training and service purposes

LGE Internal Use Only

4. Wiring Diagrams

- 6 -

Only for training and service purposes

LGE Internal Use Only

5. Exploded View

435512

552115

435301

137213

447910

559010

549610

437212

435300

552111

237204

552203B

148000

554160

548490

661400

561410

349480

237202

435301

437211

430410

152503

435513

349480

554031B

554031A

352111B

346810

552117

649950

W6200

268711D

559010

552203A

263230C

263230B

268711C

263230D

W6640B

W6640A

268200

W6631

W52240

552200

55211G

552560

566000

552202

W52102

552116

W0FZZ

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,)

Model Classiﬁcation Description Part Number Location Number Remark

AUUW423D Inverter Heating

Compressor 5416A90008Q 554160

Harness,Multi EAD42034503 W6631

P/NO : MFL62129313

January, 2010

LG LUU426HV Owner's manual

Brand: LG

Model: LUU426HV

Category: Hardware cooling accessories

Type: Owner's manual

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LG LUU426HV Owner's manual

LG LUU426HV Owner's manual

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