Goldstar Lwc071jgaa0 Service Manual

Internal Use Only

http://biz.lgservice.com

LG Room Air Conditioner

SVC MANUAL(Exploded View)

MODEL : LWJ0515ACW/P LWJ0514ACG LWC071JGAA0 LWC061JPAA1/2 LWC061JGAA1 LWC051JPAA0 LWC051JGAA1

CAUTION

Before Servicing the unit, read the safety precautions in General SVC manual. Only for authorized service personnel.

LWJ0710ACG

Air Conditioner Service Manual

TABLE OF CONTENTS

Safety Precautions..........................................................................................................................................3

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

Outside Dimensions ...................................................................................................................................5

Product Specifications ..................................................................................................................................6

Installation .......................................................................................................................................................8

Select the Best Location ...........................................................................................................................8

How to Install..............................................................................................................................................8

Installation Kits Content(Some Models) .....................................................................................................8

How to Secure the Drain Pipe..................................................................................................................10

Operation ......................................................................................................................................................11

Features ...................................................................................................................................................11

Insulation Resistance Test........................................................................................................................11

About the Controls on the Air conditioner ................................................................................................11

Disassembly ..................................................................................................................................................12

Mechanical Parts......................................................................................................................................12

Air Handling Parts ....................................................................................................................................13

Electrical Parts .........................................................................................................................................14

Refrigerating Cycle...................................................................................................................................15

Schematic Diagram.......................................................................................................................................18

Wiring Diagram.........................................................................................................................................18

Troubleshooting Guide .................................................................................................................................20

Piping System ..........................................................................................................................................20

Troubleshooting Guide .............................................................................................................................21

Room Air Conditioner Voltage Limits........................................................................................................23

Exploded View ..............................................................................................................................................26

- 2 -

LGE Internal Use Only

Safety Precautions

WARNING

CAUTION

WARNING

Safety Precautions

To prevent injury to the user or other people and property damage, the following instructions must be followed.

■ Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is classified by the following indications.

This symbol indicates the possibility of death or serious injury.

This symbol indicates the possibility of injury or damage to property only.

■ Meanings of symbols used in this manual are as shown below.

Be sure not to do.

Be sure to follow the instruction.

■ Installation

Do not use damaged power cord plugs, or a loose socket.

• There is risk of fire or electric shock.

Always use the power plug and socket with the ground terminal.

• There is risk of electric shock.

- 3 -

LGE Internal Use Only

Safety Precautions

Gasolin

Sharp edges

Do not modify or extend the power cord.

• There is risk or fire or electric shock.

Be cautious when unpacking and installing the product.

• Sharp edges could cause injury. Be especially careful

of the case edges and the fins on the condenser and evaporator.

Do not install, remove, or re-install the unit by yourself.

• There is risk of fire, electric shock, explosion, or injury.

Do not store or use flammable gas or combustibles near the air conditioner.

• There is risk of fire or failure of product.

Be sure the installation area does not deteriorate with age.

• If the base collapses, the air conditioner could fall with

it, causing property damage, product failure, and personal injury.

- 4 -

LGE Internal Use Only

Dimensions

H

D

W

Operation

High Fan

Low Fan

High Cool

Off

Low Cool

Thermostat

1

2

3

4

5

6

7

8

9

NOTICE

Symbols Used in this Manual

This symbol alerts you to the risk of electric shock.

This symbol alerts you to hazards that could cause harm to the air conditioner.

This symbol indicates special notes.

Outside Dimensions

Dimensions

Model

Dimension

W mm(inch) 472(18 9/16")

H mm(inch) 312(12 1/4")

D mm(inch) 370(14

All Model

9

/16")

- 5 -

LGE Internal Use Only

Product Specifications

NOTICE

Product Specifications

MODELS

ITEMS

COOLING CAPACITY (BTU/h) 5,050 5,200 5,250 6,000

POWER SUPPLY (Phase, V, Hz) 1ø, 115V, 60HZ

INPUT (W) 520 530 540 620

OPERATING CURRENT (AMP.) 4.8 5.0 5.8

REFRIGERANT CONTROL CAPILLARY TUBE

REFRIGERANT CHARGE (R-22)

INSIDE FAN TURBO

OUTSIDE FAN ROPELLER FAN WITH SLINGER RING

AIR DISCHARGE 2-WAY (RIGHT AND LEFT)

CHASSIS TOP-DOWN

PROTECTOR

TEMPERATURE CONTROL THERMOSTAT

LWC051JGAA0

LWJ0514ACG

R-5000A

225g(7.9 Oz) 220g (7.8 Oz) 235g(8.3 Oz)

LWC051JGAA1

WR-5220

R5050

• OVERLOAD PROTECTOR FOR COMPRESSOR

• INTERNAL PROTECTOR FOR FAN MOTOR

LWJ0515AAG

WG-5220Y3

LWC061JGAA1

WR-6020

R-6000A

ROTARY SWITCH 5 POSITIONS (LOW FAN, HIGH FAN, OFF, HIGH COOL, LOW COOL)

FAN MOTOR 6 POLES, 19W

SPECIFICATIONS ARE SUBJECT TO MINOR CHANGE WITHOUT NOTICE FOR FURTHER IMPROVEMENT.

6 POLES, 21W

- 6 -

LGE Internal Use Only

Product Specifications

NOTICE

MODELS

ITEMS

COOLING CAPACITY (BTU/h) 6,000 7,000

POWER SUPPLY (Phase, V, Hz) 1ø, 115V, 60HZ

INPUT (W) 620 720

OPERATING CURRENT (AMP.) 5.8 6.7

REFRIGERANT CONTROL CAPILLARY TUBE

REFRIGERANT CHARGE (R-22)

INSIDE FAN TURBO

OUTSIDE FAN ROPELLER FAN WITH SLINGER RING

AIR DISCHARGE 2-WAY (RIGHT AND LEFT)

CHASSIS TOP-DOWN

PROTECTOR

TEMPERATURE CONTROL THERMOSTAT

LWC061JGAA2

R6000A

350g (12.3 Oz) 315g(11.1 Oz)

• OVERLOAD PROTECTOR FOR COMPRESSOR

• INTERNAL PROTECTOR FOR FAN MOTOR

LWC071JGAA0

R7003

ROTARY SWITCH 5 POSITIONS (LOW FAN, HIGH FAN, OFF, HIGH COOL, LOW COOL)

FAN MOTOR 6 POLES, 19W

SPECIFICATIONS ARE SUBJECT TO MINOR CHANGE WITHOUT NOTICE FOR FURTHER IMPROVEMENT.

- 7 -

LGE Internal Use Only

NOTICE

Installation

ABOUT / "

Over 20"

HEAT

RADIATION

FENCE

AWNING

OUTSIDE

INSIDE

OOLED AIR

30"-60"

1

4

OUTDOORSINDOORS

INNER SILL

OUTER

SILL

INNER

SILL

WOOD STRIP MOUNTED

ON TOP OF INNER SILL

WOOD STRIP

FOR

L

BRACKET

3

/4"

CLEARANCE

1" MAX.

STORM

WINDOW

FRAME

OUTDOORSINDOORS

OUTER

SILL

Installation

This air conditioner is designed with a button-down chassis so it can be easily installed in a window.

Select the Best Location

1. To prevent vibration and noise, make sure the unit is installed securely and firmly.

2. Install the unit where the sun does not shine directly on

the unit.

3. The outside of the cabinet must extend outward for at

least 10" and there should be no obstacles, such as a fence or wall, within 20" from the back of the cabinet because it will prevent heat radiation of the condenser. Restriction of outside air will greatly reduce the cooling efficiency of the air conditioner.

CAUTION: All side louvers of the cabinet must remain exposed on the outdside of the structure.

4. Install the unit slanted slightly so the back is slightly lower than the front (about 1/4"). This will force condensed water to the outside.

5. Install the unit with the bottom about 30"~60" above the floor level.

Figure 1

How to Install

Window Requirements

1. This unit is designed for installation in standard double hung windows with actual opening widths of 22" to 36". The upper and lower sash must open sufficiently to allow a clear vertical opening of 13" from the bottom of the sash to the window stool.

2. If storm window presents interference, fasten a 2" wide wood strip to the inner window sill across the full width of the sill. The wood strip should be thick enough to raise the height of the window sill so that the unit can be installed without interference by the storm window frame. See Figure. 3. Top of wood strip should be approximately 3/4" higher than the storm window frame (STORM WINDOW FRAME) or wood strip (OUTDOORS) to help condensation to drain properly to the outside.

3. Install a second wood strip (approximately 6" long by 11/2" wide and same thickness as first strip) in the center of the outer sill flush against the back off the inner sill. This will raise the L bracket as shown Figure. 3.

4. If the distance between STORM WINDOW FRAME and WOOD STRIP MOUNTED ON TOP OF INNER SILL is more than 1", two of wood strip are not necessary.

All supporting parts should be secured to firm wood, masonry, or metal.

- 8 -

Figure 2

Figure 3

LGE Internal Use Only

HARDWARE

TYPE E: 1EA

(SASH SEAL)

(Not adhesive backed)

TYPE D: 1EA

(SEAL STRIP)

(Adhesive backed)

TYPE F: 2EA

(GUIDE PANEL)

TYPE C: 3EA

(L BACKET)

TYPE A: 11EA

(SHORT SCREW)

10mm

TYPE B: 5EA

(WOOD SCREW)

16mm

TYPE G: 1EA

(SUPPORT BACKET)

DRAIN PIPE

TYPE A

ROOM SIDE

CENTER LINE

INNER SILL

SEAL STRIP (TYPE D)

OUTSIDE

INSIDE

L

BRACKET

OUTER SILL

INNER SILL

TYPE A

8"

CENTER LINE

Installation

Installation Kits Contents(some Models)

Before Installation (Some models Including Installation Kit)

1. Insert the guide panels into the guides of the air conditioner. Fasten the curtains to the unit with screws (TYPE A), as shown Figure. 4.

2. Cut the adhesive-backed seal strip (TYPE D) to the window width. Remove the backing from the seal strip and attach the seal strip to the underside of the bottom window. (Figure. 5)

Figure 4

Now Start Installation(Some Models Including Installation Kit)

1. Locating Unit in Window

Open the window and mark center line on the center of the inner sill, as shown in Figure. 6.

2. Attach L Bracket

a. Install the L brackets behind the inner window sill, with the

b. The bracket helps to hold unit securely in place. Be sure to

3. Install the Air Conditioner in the Window Install

a. Carefully lift the air conditioner and slide it into the open win-

short side of bracket as shown. |Use the 2 screws (TYPE A) provided.

place bracket edge flush against back of inner sill. See Figure.7.

CAUTION: During the following step, hold

unit firmly until window sash is lowered to

top channel behind side panel frames. Personal injury or property damage may result if unit falls from window.

dow. Make sure the bottom guide of the air conditioner drops into the notches of the L bracket. See Figure. 7.

- 9 -

Figure 5

Figure 6

Figure 7

LGE Internal Use Only

Installation

CENTER LINE

SEAL

WINDOW FRAME

BOTTOM GUIDE

ABOUT

/ "

L

BRACKET

UPPER GUIDE

DRAIN PIPE

DRAIN CAP

hang push

TYPE B

SASH SEAL

(TYPE E)

L BRACKET

TYPE A

Operation

High Fan

Low Fan

High Cool

Off

Low Cool

Thermostat

1

2

3

4

5

6

7

8

9

TYPE B

Support Bracket (TYPE G)

1

4

1 2

IMPORTANT :

When the air conditioner drops into the L bracket, the air conditioner will be centered in window opening as shown in Figure. 8.

b. While steadying the air conditioner, carefully bring the

window sash down behind the upper guide of the air conditioner, as shown in Figure. 9.

4. Secure the Guide Panels

Extend the guide panels (TYPE F) to fill the window opening using 4 screws (TYPE B) to secure them, as shown in Figure. 10.

5. Install the Sash Seal and Sash lock

a. Cut the sash seal (TYPE E) to the window width. Stuff

the sash seal between the glass and the window to prevent air and insects from getting into the room, as shown in Figure. 10.

b. Fasten the L bracket using a (TYPE A) screw, as

shown in Figure. 10.

Figure 8

Figure 9

Figure 10

6. a. Remove the screws that secure the cabinet and base pan in the right side.

b. Fasten the suport bracket (TYPE G) using a

removed screw. Attach the suport bracket (TYPE G) in the inner window sill with a screw (TYPE B), as shown Figure. 11.

7. Window installation of room air conditioner is now

completed. See ELECTRICAL DATA for attaching power cord to electrical outlet.

How to Secure the Drain pipe

In humid weather, excess water may cause the BASE PAN to overflow. To drain the water, remove the DRAIN CAP and secure the DRAIN PIPE to the rear hole of the BASE PAN. (Figure. 12)

Press the drain pipe into the hole by pushing down and away from the fins to avoid injury.

Figure 11

Figure 12

- 10 -

LGE Internal Use Only

Operation

High

Fan

Low Fan

High Cool

Off

Low Cool

Thermostat

1

2

3

4

5

6

7

8

9

Feature

• DESIGNED FOR COOLING ONLY

• POWERFUL AND INCREDIBLE COOLING

• TOP-DOWN CHASSIS FOR THE SIMPLE INSTALLATION AND SERVICE

• BUILT-IN ADJUSTABLE THERMOSTAT

• WASHABLE ONE-TOUCH FILTER

• COMPACT SIZE

Insulation Resistance Test

INSULATION RESISTANCE TEST

1. Unplug the power cord and connect a jumper between 2 pins (black and white).

Operation

2. The grounding conductor (green or green and yellow) is to be open.

3. Measure the resistance value with an ohm meter between the jumpered lead and each exposed metallic part on the equipment at all positions [except Off] of the ROTARY SWITCH.

4. The value should be over 1 MΩ.

About the jControls or the Air Conditioner

Off - Turns air conditioner off. High Fan - High speed fan operation without cooling. Low Fan - Low speed fan operation without cooling. High Cool - Cooling with high speed fan operation. Low Cool - Cooling with low speed fan operation.

FAN ONLY- Fan operation without cooling. TURBO COOL - Cooling with high speed fan operation.

This automatically controls the temperature of the indoor air. Turn the knob so that arrow points to the larger marks for greater cooling. Point the arrow to the smaller marks for more moderate cooling. (i.e. the higher number, the greater cooling)

- 11 -

LGE Internal Use Only

NOTICE

Disassembly

Mechanical Parts

1. FRONT GRILLE

1. Disconnect the unit from source of power.

2. Remove the two knobs by pulling them off.

Using a screwdriver, remove the screw that secures the front grille to control board. (See Figure 13)

3. Push the front grille up from the bottom.

Pull the top of the front grille away from the cabinet as the top tabs lift out of their slots. (See Figure 14)

4. Replace the grille by placing the tabs in the slots and

push the grille until it snaps into place.

2. CABINET

1. Disconnect the unit from the power source.

2. Remove the front grille. (Refer to section 1)

3. Remove 9 screws that secure the cabinet to the base pan

and condenser. (See Figure 15)

4. Lift the cabinet from the unit.

5. Re-install by referring to the procedures above.

Figure 13

Figure 14

3. CONTROL BOARD

1. Disconnect the unit from the power source.

2. Remove the front grille. (Refer to Section 1)

3. Remove the cabinet. (Refer to Section 2)

4. Remove 2 screws that secure the control board to base

pan and air guide. (See Figure 16)

5. Pull the control board toward yourself.

Controls, wires, and capacitor are now accessible for servicing. Discharge the capacitor before servicing. See step 2.3.3 on page 8 for procedures.

6. Disconnect one housing terminal and 3 wires for the fan

motor and compressor. (See Figure 17)

7. Re-install components by referring to procedures above.

(Refer to wiring diagram on page 17 in this manual or inside control board.)

Figure 15

Figure 16

- 12 -

Figure 17

LGE Internal Use Only

Air Handling Parts

4. AIR GUIDE UPPER

1. Disconnect the unit from the power source.

2. Remove the front grille. (Refer to Section 1)

3. Remove the cabinet. (Refer to Section 2)

4. Remove the control board. (Refer to Section 3)

5. Remove 2 screws that secure the brace to air

guide upper and shroud. (See Figure 18)

6. Remove 2 screws that secure the air guide

upper to air guide lower. (See Figure 8)

7. Lift air guide upper upward.

8. Re-install by referring to the procedures above.

5. ORIFICE, TURBO FAN AND FAN

1. Disconnect the unit from the power source.

2. Remove the front grille. (Refer to Section )

3. Remove the cabinet. (Refer to Section 2)

4. Remove the control board. (Refer to Section 3)

5. Remove the air guide upper. (Refer to Section 24)

6. Remove 2 screws that secure the base pan to con-

denser. (See Figure 19)

7. Remove 2 screws that secures the shroud to

channel of condenser.

8. Press the snap area of shroud with your thumbs.

This allows you to remove it from the condenser.

9. Lift the compressor upward with the evaporator and

condenser. (See Figure 19)

10. Remove the orifice by pushing the snap area of the air guide blower. (See Figure 20)

11. Remove the clamp springs which are clamped to the boss of fan and turbo fan by hand plier.

(See Figure 21)

12. Pull the fan and turbo fan outward.

13. Remove the shroud.

14. Re-install by referring to the procedures above.

Disassembly

Figure 18

Figure 19

Figure 20

- 13 -

Figure 21

LGE Internal Use Only

Disassembly

6. MOTOR

1. Disconnect the unit from the power source.

2. Remove the front grille. (Refer to Section 1)

3. Remove the cabinet. (Refer to Section 2)

4. Remove the control board. (Refer to Section 3)

5. Remove the air guide upper. (Refer to Section 4)

6. Remove the compressor, turbo fan, fan and shroud.

(Refer to Section 5)

7. Remove 2 screws that secure the motor to the

motor. (See Figure 22)

8. Remove the motor.

9. Re-install by referring to the procedures above.

7. AIR GUIDE

1. Disconnect the unit from the power source.

2. Remove the front grille. (Refer to Section 1)

3. Remove the cabinet. (Refer to Section 2)

4. Remove the control board. (Refer to Section 3)

5. Remove the air guide upper. (Refer to Section 4)

6. Remove the compressor, turbo fan, fan and shroud.

(Refer to Section 5)

7. Remove the motor. (Refer to Section 6)

8. Remove 2 screws that secure the air guide to the

base pan. (See Figure 23)

9. Push the air guide backward and lift it upward.

(See Figure 23)

10. Re-install by referring to the procedures above.

Electrical Parts

8. OVERLOAD PROTECTOR

1. Remove the front grille and cabinet. (Refer to Section 1, 2)

2. Remove the nut which fastens the terminal cover.

3. Remove the terminal cover.

4. Remove all the leads from the overload protector.

5. Remove the overload protector.

6. Re-install the components by referring to the removal procedure above. (See Figure 24 and 25)

Figure 22

Figure 23

9. COMPRESSOR

1. Remove the front grille and cabinet. (Refer to Section 1, 2)

2. Discharge the refrigerant by using a refrigerant recovery system.

3. Remove the overload protector. (Refer to Section 8)

4. After discharging the unit completely, unbrace the suction and discharge pipes at the compressor connections.

5. Remove 3 nuts which fasten the compressor.

6. Remove the compressor.

7. Re-install by referring to the removal procedure above. (See Figure 25)

- 14 -

Figure 24

Figure 25

LGE Internal Use Only

10. CAPACITOR

1. Remove the cabinet. (Refer to Section 2)

2. Remove the control board. (Refer to Section 3)

3. Discharge the capacitor by placing a 20 KΩ resistor across the capacitor terminals.

4. Remove the screw which fastens the capacitor clamp.

5. Remove all the leads of capacitor terminals.

6. Re-install the components by referring to the removal procedure above. (See Figure 26)

11. THERMOSTAT

1. Remove the cabinet. (Refer to Section 2)

2. Remove the control board. (Refer to Section 3)

3. Remove 2 screws which fasten the thermostat. (See Figure 27)

4. Remove all the leads of the thermostat terminals.

5. Remove the thermostat.

6. Re-install the components by referring to the removal procedure above.

12. ROTARY SWITCH

1. Remove the cabinet. (Refer to Section 2)

2. Remove the control board. (Refer to Section 3)

3. Remove 2 screws which fasten the rotary switch. (See Figure 28)

4. Remove all the leads of the rotary switch terminals.

5. Remove the rotary switch.

6. Re-install the components by referring to the removal procedure above.

Disassembly

Figure 26

Figure 27

Figure 28

13. POWER CORD

1. Disconnect the unit from source of power.

2. Remove the front grille. (Refer to Section 1)

3. Remove the cabinet. (Refer to Section .2)

4. Remove a screw that secures control board to base pan and air guide. (Refer to Section 3)

5. Pulls the control board toward you.

6. Disconnect the 2 receptacles and remove the grounding screw.

7. Remove a screw securing the clip with cord to the control board. (See Figure 29)

8. Pull the power cord.

9. Re-install by referring to procedures above.

Refrigerating Cycle

14. CONDENSER

1. Remove the cabinet. (Refer to Section 2)

2. Discharge the refrigerant by using a refrigerant recovery system.

3. Remove 2 screws which fasten the condenser. (See Figure 30)

4. After discharging the refrigerant completely, unbraze the interconnecting tube at the condenser connections.

5. Remove the condenser.

6. Re-install by referring to the procedures above.

Figure 29

Figure 30

- 15 -

LGE Internal Use Only

Disassembly

NOTICE

15. EVAPORATOR

1. Remove the cabinet. (Refer to Section 2)

2. Discharge the refrigerant by using a refrigerant recovery system.

3. Remove the air guide upper. (Refer to Section 4)

4. After discharging the refrigerant completely, unbraze the interconnecting tube at the evaporator connections.

5. Remove the evaporator.

6. Re-install by referring to the procedures above.

16. CAPILLARY TUBE

1. Remove the cabinet. (Refer to Section 2)

2. Discharge the refrigerant by using a refrigerant recovery system.

3. Remove the air guide upper. (Refer to Section 4)

4. After discharging the refrigerant completely, unbraze the interconnecting tube of the capillary tube.

5. Remove the capillary tube.

6. Re-install by referring to the procedures above.

Replacement of the refrigeration cycle.

1. When replacing the refrigerating cycle, be sure to discharge the refrigerant by using a refrigerant recovery system.

2. After discharging the unit completely, remove the desired components, and unbraze the pinch-off tubes.

3. Solder service valves into the pinch-off tube ports, leaving the valves open.

4. Solder the pinch-off tubes with service valves.

5. After completing the above procedures, the valve must be closed and left in place on the system for any subsequent procedures.

6. Evacuate as follows: 6-1. Connect the vacuum pump, as illustrated in

figure 31A.

6-2. Start the vacuum pump. Slowly open manifold

valves A and B with two full turns counterclockwise and leave the valves closed. The vacuum pump is now pulling through valves A and B up to valve C by means of manifold and the entire system.

CAUTION: If high vacuum equipment is used, just crack valves A and B for a few minutes, then open

slowly with the two full turns counter-clockwise. This will keep oil from foaming and being drawn into the vacuum pump.

6-3. Operate the vacuum pump for 20 to 30 minutes,

until 600 micron vacuum is obtained. Close valves A and B and observe vacuum gauge for a few minutes. A rise in pressure would indicate a possible leak or moisture remaining in the system. With valves A and B closed, stop the vacuum pump.

6-4. Remove the hose from the vacuum pump and

place it on the charging cylinder. See figure 20B. Open valve C. Discharge the line at the manifold connection.

6-5. The system is now ready for final charging.

7. Recharge as follows: 7-1. Rotary compressor systems are charged from

the high-side. If the total charge cannot be put in the high-side, the balance will be put in the suction line through the access valve which is installed as the system is opened.

7-2. Connect the charging cylinder as shown in fig-

ure 31B. With valve C open, discharge the hose at the manifold connection.

7-3. Open valve A and allow the proper charge to

enter the system. Valve B is still closed.

7-4. If more charge is required, the high-side will

not take it. Close valve A.

7-5. With the unit running, open valve B and add

the balance of the charge. a. Do not add the liquid refrigerant to the low-

side.

b. Watch the low-side gauge, allow pressure to

rise to 30 lbs(0.2MP).

c. Turn off valve B and allow the pressure to

drop.

d. Repeat steps B and C until the balance of

the charge is in the system.

7-6. When the unit is operating correctly, use the

pinch-off tool with the unit still running and the clamp on the pinch-off tube. Using a tube cutter, cut the pinch-off tube about 2 inches from the pinch-off tool. Use sil-fos solder and solder the pinch-off tube closed. Turn off the unit, allow setting for a while and then test the leakage of the pinch-off connection.

- 16 -

LGE Internal Use Only

Disassembly

B

A

B

A

B

A

COMPOUND GAUGE

SEE INSETS

BELOW

CAPILLARY TUBE

EVAPORATOR (LOW PRESSURE SIDE)

COMPRESSOR

CONDENSER (HIGH PRESSURE SIDE)

EXTERNAL VACUUM PUMP

LO HI

CHARGING CYLINDER

MANIFOLD

GAUGE

C

Equipment needed: Vacuum pump, charging cylinder, manifold gauge, brazing equipment, pinch-off tool capable of making a vapor proof seal, leak detector, tubing cutter, hand tools to remove components and service valve.

Figure 31A-Pulling Vacuum

- 17 -

Figure 31B-Charging

LGE Internal Use Only

Schematic Diagram

WH(BL)

POWER INPUT

BK(BR)

(Ribbed) (Plain)

GN(GN/YL)

THERMISTOR

BK BK BL RD RD

BL

CN-TH1

YL YL

OR(BR) OR(BR)

OR

SYNC

MOTOR

RY-MRY-L RY-H

CN-WOR

CN-SYNC CN-DISP1 CN-DISP2

DISPLAY P.W.B ASM

RY-SYNC

FUSE 125V 2A

TRANS

FORMER

ZNR01J

RY-COMP

MAIN P.W.B ASM

CN-BL

CN-RD

CN-BK

BK

WH

BK

RD BL BL

OLP

BR

RD

MOTOR

CAPACITOR

F

R

S

COMP.

C

H

3854AR2330K WIRING DIAGRAM

1

6

4

10

5

8

9

3

7

2

Schematic Diagram

Wiring Diagram

• MODEL: LWJ0514ACG, WR-5220, WR-6020, LWC051JGAA0

REF. NO

1

2

3

4

5

6

7

DESCRIPTION & NAME

POWER CORD ASSY

FAN MOTOR

COMPRESSOR

ROTARY SWITCH

THERMOSTAT

CAPACITOR

OVERLOAD PROTECTOR

- 18 -

Q'TY

1

LGE Internal Use Only

Schematic Diagram

5

1

2

6

7

3

4

• MODEL:

LWJ0515AAG, WG-5220Y3, LWC051JGAA1, LWC061JGAA1, LWC061JGAA2, LWC071JGAA0, R5050, R-5000A, R6000A, R-6000A, R7003

REF. NO

1

2

3

4

5

6

7

DESCRIPTION & NAME

POWER CORD ASSY

FAN MOTOR

COMPRESSOR

ROTARY SWITCH

THERMOSTAT

CAPACITOR

OVERLOAD PROTECTOR

Q'TY

1

- 19 -

LGE Internal Use Only

Troubleshooting Guide

COOLED AIR

HOT DISCHARGED AIR

MOTOR

COMPRESSOR

ROOM AIR HEAT LOAD

CAPILLARY TUBE

(LIQUID REFRIGERANT)

LIQUID OUTLET

VAPOR INLET COMPLETE LIQUID BOIL OFF POINT

SUCTION LINE COOL LOW PRESSURE VAPOR

LIQUID PRESSURE DROP

DISCHARGE

LINE

NOT HIGH PRESSURE

VAPOR

OUTSIDE COOLING AIR FOR REFRIGERANT PASS THROUGH

EVAPORATOR COILS CONDENSER COILS

ROOM AIR CONDITIONER

CYCLE OF REFRIGERATION

HIGH PRESSURE VAPOR

LIQUID REFRIGERANT

LOW PRESSURE VAPOR

OIL

Troubleshooting Guide

Piping System

CONDENSER COILS

FAN

CAPILLARY

MOTOR

TUBE

TURBO FAN

EVAPORATOR COILS

Following is a brief description of the important components and their function in what is called the refrigeration system. Reference should be made to Figure 33 to follow the refrigerating cycle and the flow of the refrigerant in the cooling cycle.

Figure 33

- 20 -

LGE Internal Use Only

Troubleshooting Guide

In general, possible trouble is classified in two kinds. The one is called Starting Failure which is caused by an electrical defect. The other is Ineffective Air Conditioning

caused by a defect in the refrigeration circuit and improper application.

Unit is running but cooling is ineffective.

Ineffective Cooling

Check cold air circulation for smooth flow.

Dirty indoor coil (heat exchanger)

Malfunction of fan.

Clogging of air filter.

Obstruction at air outlet.

Check outdoor coil (heat exchanger) and fan operation.

Check gas leakage.

Repair gas leak.

Replacement of unit if the unit is beyond repair.

Check heat load increase.

Clean condenser.

Not on separate circuit

Check inside gas pressure.

Adjust refrigerant charge.

Remove obstruction.

Check clogging in refrigeration circuit.

Satisfactory operation

Repair clogging in refrigeration circuit.

with temperature difference of inlet & outlet air; 44~50°F (7~10°C)

- 21 -

Malfunction of compressor.

Replacement of compressor.

LGE Internal Use Only

Troubleshooting Guide

Fails to Start

Check of power source.

Check of control switch setting.

Compressor fails only to start.

Drop of power voltage.

Defect of compressor capacitor.

Improper thermostat setting

Loose terminal connection

Check of circuit breaker and fuse.

Gas leakage of feeler bulb of thermostat.

Check control switch.

Fan only fails to start.

Improper wiring.

Defect of fan motor capacitor.

Capacitor check.

Replacement.

Irregular motor resistance (Ω)

Irregular motor insulation (Ω)

Replacement of compressor (Motor damaged).

Improper wiring

Irregular motor resistance (Ω) Irregular motor insulation (Ω)

Replacement of fan motor.

Regular but fails to start.

Replacement of compressor. (Locking of piston, metal.)

- 22 -

LGE Internal Use Only

Troubleshooting Guide

Room Air Conditioner Voltage Limits

NAME PLATE RATING MINIMUM MAXIMUM

115V ± 10% 103.5V 126.5V

COMPLAINT CAUSE REMEDY

Fan motor will not run. No power Check voltage at outlet. Correct if none.

Power supply cord Check voltage to rotary switch. If none, check

power supply cord. Replace cord if circuit is open.

Rotary switch Check switch continuity. Refer to wiring diagram

for terminal identification. Replace switch if defective.

Wire disconnected or Connect wire. Refer to wiring diagram for connection loose terminal identification. Repair or replace loose

terminal.

Capacitor (Discharge Test capacitor. capacitor before testing.) Replace if not within ±10% of manufacturer's

rating. Replace if shorted, open, or damaged.

Will not rotate Fan blade hitting shroud or blower wheel hitting

scroll. Re-align assembly.

Units using slinger ring condenser fans must have 0.22~0.25 inch clearance to the base. If necessary, shim up the bottom of the fan motor with mounting screw(s).

Check fan motor bearings; if motor shaft will not rotate, replace the motor.

Fan motor runs. Revolves on overload Check voltage. See limits on this page.

If not within limits, call an electrician.

- 23 -

Test capacitor. Check bearings. Does the fan blade rotate

freely?

If not, replace fan motor.

Pay attention to any change from high speed to low speed. If the speed does not change, replace the motor.

LGE Internal Use Only

Troubleshooting Guide

COMPLAINT CAUSE REMEDY

Fan motor noise. Fan If cracked, out of balance, or partially missing,

replace it.

Blower If cracked, out of balance, or partially missing,

replace it.

Loose set screw Tighten it.

Worn bearings If knocking sounds continue when running or

loose, replace the motor. If the motor hums or noise appears to be internal while running, replace motor.

Compressor will not run, Voltage Check voltage. See the limits on the preceding fan motor runs. page. If not within limits, call an electrician.

Wiring Check the wire connections; if loose, repair or

replace the terminal. If the wires are disconnected, refer to wiring diagram for identification, and replace the wires. Check the wire connections; If not according to the wiring diagram, correct the connections.

Rotary Check for continuity, refer to the wiring diagram

for terminal identification. Replace the switch if the circuit is open.

Thermostat Check the position of knob. If not at the coldest

setting, advance the knob to this setting and restart the unit.

Check the continuity of the thermostat. Replace the thermostat if the circuit is open.

Capacitor (discharge Check the capacitor. capacitor before Replace if not within ±10% of manufacturer’s servicing.) rating, replace if shorted, open, or damaged.

Compressor Check the compressor for open circuit or

ground. If open or grounded, replace the compressor.

Overload

Compressor cycles on Voltage Check the voltage. See the limits on the overload. preceding page. If voltage is not within these limits,

Check the compressor overload if externally mounted. Replace if open. (If the compressor temperature is high, remove the overload, cool, and retest.)

call an electrician.

Overload Check overload, if externally mounted.

- 24 -

Replace if open. (If the compressor temperature is high, remove the overload, cool, and retest.)

LGE Internal Use Only

Troubleshooting Guide

COMPLAINT CAUSE REMEDY

Compressor cycles on Fan motor If not running, determine the cause. Replace if overload. required.

Condenser air flow Remove the cabinet, inspect the interior surface restriction of the condenser. If restricted, clean carefully

with a vacuum cleaner (do not damage fins) or brush. Clean the interior base before re-assembling.

Condenser fins If the condenser fins are closed over a large (damaged) area on the coil surface, head pressures will

increase, causing the compressor to cycle. Straighten the fins or replace the coil.

Capacitor Test the capacitor.

Wiring Check the terminals. If loose, repair or replace.

Refrigeration system Check the system for a restriction.

Insufficient cooling Air filter If restricted, clean or replace.

Unit undersized Determine if the unit is properly sized for the

area to be cooled.

Excessive noise Blower or fan Check the set screw, or clamp. If loose or miss-

ing, correct. If the blower or fan is hitting scroll or barrier, rearrange the air handling parts.

Copper tubing Remove the cabinet and carefully rearrange the

tubing not to contact the cabinet, compressor, shroud, and barrier.

- 25 -

LGE Internal Use Only

Exploded View

152302

135313

352390

149410

130410

359012

135312

354210

349480

352380

559010

346811

554030

130910

266003

264110

269300

W0CZZ249950

550140

554160

567502

352115

552111

352113

35211A

147582B

147582A

552102

Exploded View

* LWJ0710ACG, LWC071JGAA0

- 26 -

LGE Internal Use Only

Memo

152302

135313

352390

149410

130410

359012

135312

354210

349480

352380

559010

346811

554030

130910

266003

264110

269300

W0CZZ249950

550140

554160

567502

352115

552111

35211A

147582B

147582A

552102

*

LWJ0515ACW/P, LWJ0514ACG, LWC061JPAA1/2, LWC061JGAA1, LWC051JPAA0, LWC051JGAA1

- 27 -

LGE Internal Use Only

P/NO : 3828A20038K

FEBRUARY, 2008

Goldstar Lwc071jgaa0 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual