LG LK-0329CH/AH, LK-0429CH/AH, LK-0529CH/AH Service Manual

Single Packaged
Air Conditioner

SERVICE MANUAL

MODELS: LK-0329CH/AH

LK-0429CH/AH
LK-0529CH/AH

LK-SM-101

— 2 —

Contents

Model Number Nomenclature...............................................................................................3

General Data ..........................................................................................................................4

Dimensions............................................................................................................................5

Refrigerant Circuit Diagram..................................................................................................6

Wiring Diagram......................................................................................................................7

Troubleshooting Guide.........................................................................................................8

Features of Controller.........................................................................................................14

Exploded View and Replacement Parts List.....................................................................15

Specification of Components.............................................................................................18

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LK-0529CH

Development Sequence

LG
Single Package Air Conditioner

H: Horizontal Flow

C: Cooling Only
A: Gold Fin + Cooling Only

2 : 220V, 60Hz, 1Ø

03 : 3 ton 04 : 4 ton 05 : 5 ton

Nominal cooling capacity

Model Number Nomenclature

— 4 —

General Data

Table-1

Nominal ton (Ton) 3 4 5
Models LK-0329CH/AH LK-0429CH/AH LK-0529CH/AH

Capacity ARI Net Cooling Capacity (BTU/hr) 35,000 47,000 57,000

(Kcal/h) 8,821 11,845 14,364

Electrical Data

Voltage (V,PH) 208~230V,1PH 208~230V,1PH 208~230V,1PH
M.C.A(with standard motor)

Cooling (Amps) 29 31 48

Power Input Cooling (Watt) 3,740 4,350 6,000

Performance

Air Circulation

Nominal

CFM

CFM 1,050 1,590 1,750
SEER Cooling (BTU/hr.W) 10.0 11.0 10.0
Sound Rating Cooling dB(A) 8 8.4 8.4

Features LG Electronic Thermostat Option Option Option

Time Delay Safety Function

¥¥¥

Cooling Operation Mode

¥¥¥

Heating Operation Mode(with E/Heater)

¥¥¥

Soft Dry Operation - - ­Timer Setting (24-Hour on/off) - - ­Auto restart mode - - ­Humidifier function - - ­Test function - - ­Self-Diagnosis Function - - ­Filter type - - -

Compressor

Type

Scroll Scroll Scroll

Quantity 1 1 1

Outdoor Coil

Type

High efficiency High efficiency High efficiency

Tube size(O.D) (inch) 9/32 9/32 9/32

(mm) 7.00 7.00 7.00
Row/FPI 1R/18FPI 2R/18FPI 2R/18FPI
Lengh (inch) 55 1/8 55 1/8 55 1/8

(mm) 1,400 1,400 1,400
Face area (sq.ft) 10.72 10.72 10.72

(m2) 1.00 1.00 1.00

Indoor Coil

Type

High efficiency High efficiency High efficiency

Tube size(O.D) (inch) 3/8 3/8 3/8

(mm) 9.52 9.52 9.52
Row/FPI 2R/18FPI 3R/18FPI 3R/18FPI
Lengh (inch) 21 5/8 21 5/8 21 5/8

(mm) 550 550 550
Face area (sq.ft) 4.51 4.51 4.51

(m2) 0.42 0.42 0.42

Outdoor Fan

Type Propeller Propeller Propeller
No. Used/Diameter(in.) 1EA/22" 1EA/22" 1EA/22"
Drive Type Direct Direct Direct
CFM 3,500 3,500 3,500
No. Motor/Motor output(Hp) 1/0.33 1/0.33 1/0.33
Motor RPM 1,060 1,060 1,060

Indoor Fan

Type Centrifugal Blower Fan Centrifugal Blower Fan Centrifugal Blower Fan
No. Used 1EA 1EA 1EA
Diameter/Width(in.) 11"/11" 11"/11" 11"/11"
Drive Type/Motor Step Direct/3 Direct/3 Direct/3
No.motors 1EA 1EA 1EA
Motor output(standard/oversized) 0.5Hp/N.A 0.75Hp/N.A 0.75Hp/N.A
Motor rpm(Standard/oversized) 840N.A 1,020/N.A 1,090/N.A

Drain Connection Size(in.)

3/4" 3/4" 3/4"

Refrigerant

(kg) 1.7 2.2 2.3
Refrigerant Charge (lbs) 3.75 4.85 5.07

Type R-22 R-22 R-22
Refrigerant Control Capillary Tube Capillary Tube Capillary Tube

Dimensions

Indoor unit (WxHxD) (inch) 43 3/8*28 9/16*32 11/16 43 3/8*28 9/16*32 11/16 43 3/8*28 9/16*32 11/16

(mm) 1102*725*830 1102*725*830 1102*725*830

Weight Net (kg) 110 120 140

(lbs) 242.5 264.6 308.6

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Dimensions

LK-0329CH/AH, LK-0429CH/AH, LK-0529CH/AH

A

G

BC D

E

H

SUPPLY

RETURN

F

E

Center line of hole

A

B

CLEARANCE 34"

CLEARANCE

48"

(HORIZONTAL)

CLEARANCE

34"

1.5" Dia. hole power wires

1.5" Dia. hole other purpose

CLEARANCE 18"

D

C

Unit : Inch(mm)

Unit : Inch(mm)

A28

9

/16

(725)

B32

11

/16

(830)

C43

3

/8

(1102)

D20

11

/16

(525)

E2

7

/8 (73)

A13

3

/16 (335)

B1

1

/

2 (38)

C9

1

/2 (242)

D

3

/4 (19)

E5

5

/8 (143)

F24

1

/4 (622)

G11

9

/16 (294)

H9

1

/16 (230)

— 6 —

Refrigerant Circuit Diagram

SOUTDOOR

COIL

INDOOR

COIL

: REFRIGERANT FLOW

PRESSURE

PORT

DISCHARGE

LINE

SUCTION

LINE

LOW-PRESSURE

SWITCH

PRESSURE

PORT

D

CAPILLARY

TUBE

LK-0329CH/AH, LK-0429CH/AH, LK-0529CH/AH