room air conditioner -...

LG RoomAir ConditionerSERVICE MANUAL

LG

CAUTION

website http://www.lgservice.com

• BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

• ONLY FOR AUTHORIZED SERVICE PERSONNEL.

MODEL: LWHD8000R,LWHD8000RY5,LWHD1000R,LWHD8000RY6

2 Room Air Conditioner

Air Conditioner Service Manual

TABLE OF CONTENTSSafety Precautions..........................................................................................................................................3

Dimensions .....................................................................................................................................................6Outside Dimensions ...................................................................................................................................6

Product Specifications ..................................................................................................................................7

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

Installation Check .......................................................................................................................................8

How to Secure the Drain Pipe ....................................................................................................................8

How to Install..............................................................................................................................................9

Operation ......................................................................................................................................................12

Function of Controls .................................................................................................................................12

Disassembly ..................................................................................................................................................13

Mechanical Parts......................................................................................................................................13

Air handling Parts .....................................................................................................................................14

Electrical Parts .........................................................................................................................................15

Refrigerating Cycle...................................................................................................................................17

Schematic Diagram .......................................................................................................................................20

Electronic Control Device. ........................................................................................................................20

Wiring Diagram.........................................................................................................................................21

Components Location ..............................................................................................................................22

Troubleshooting Guide .................................................................................................................................23

Pipeing System ........................................................................................................................................23

Troubleshooting Guide .............................................................................................................................24

Electrical Parts Troubleshooting Guide ....................................................................................................26

Electrical Parts .........................................................................................................................................30

Exploded View ..............................................................................................................................................36

Replacement Parts List ................................................................................................................................37

Service Manual 3

Safety Precautions

Safety Precautions

To prevent injury to the user or other people and property damage, the following instructions mustbe followed.■ Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is

classified by the following indications.

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

WARNING

CAUTION

This symbol indicates the possibility of death or serious injury.

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

Be sure not to do.

Be sure to follow the instruction.

WARNING

Always install the expansion panel(s).

• Improper assembly or installation may causeincorrect operation, including injury, fire, andelectric shock hazards.

Do not place the power cord near a heater.

• It may cause fire and electric shock.

Do not use the power cord near flammablegas or combustibles such as gasoline,benzene, thinner, etc.

• It may cause explosion or fire.

Do not disassemble or modify products.

• It may cause electric shock and failure.

Gasolin


Safety Precautions

Plug in the power plugproperly.

• Otherwise, it will causeelectric shock or fire.

Do not operate or stop theunit by inserting or pullingout the power plug.

• It will cause electric shock orfire.

Do not damage or use anunspecified power cord.


Do not modify power cordlength.


Use the air conditioner on asingle outlet circuit. Do not share the outlet withother appliances.


Always plug into agrounded outlet.

• No grounding may causeelectric shock.

Do not use the socket if it isloose or damaged.

• It may cause fire and electricshock.

Do not operate with wethands or in dampenvironment.

• It may cause electric shock.

ON

ON

Ventilate before operating airconditioner when gas goesout.

• It may cause explosion, fire,and burn.

Service Manual 5

If water enters the product, turn off the the powerswitch of the main body of appliance. Contact ser-vice center after taking the power-plug out fromthe socket.

• It will cause electric shock or failure of machine.

Do not clean the air conditioner with water.

• Water may enter the unit and degrade the insula-tion. It may cause an electric shock.

Never touch the metal parts of the unit whenremoving the filter.

• They are sharp and may cause injury.

Do not block the inlet or outlet.

• It may cause failure of appliance or performancedeteriorate.

Ensure that the outer case is not damaged byage or wear.

• If the outer case is damaged, it must be repairedor replaced immediately. Leaving it damaged could result in the air condi-tioner falling out of the window, creating a safetyhazard.

Be cautious not to touch the sharp edgeswhen installing.

• It may cause injury.

CAUTION

Safety Precautions

Sharp edges


Dimensions

Dimensions

Outside Dimensions

This symbol alerts you to the risk of electric shock.

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

This symbol indicates special notes.NOTICE

Symbols Used in this Manual

497 (19 9/16")

492 (19 3/8")

315

(12

3/8"

)

30 (

1 3 /

16")

243.3(9 9/16")12(0

.4 1/1

6") 22.5(0.8 3/32")

100.3 (3

27.5 (1 3/32")

")/1516

'F

TIMER POWERMODE

TEMP

FANSPEED

F1 LOWF2 MEDF3 HIGH

Dry Timer

Fan

EnergySaver

Cool

'F

TIMER POWERMODE

TEMP

FANSPEED

F1 LOWF2 MEDF3 HIGH

Dry Timer

Fan

EnergySaver

Cool

347

(13

21 /32"

)

497 (19 9/16") 42 (1 21/32")42 (1 21/32")

492 (19 3/8")

315

(12

3/8"

)

Specfications

Product Specifications

POWER SUPPLY

CAPACITY

POWER SUPPLYPOWER SUPPLY

(BTU/h)CAPACITYCAPACITY

INPUT

(BTU/h)(BTU/h)

POWER SUPPLY

(W)INPUTINPUT

CAPACITY

COOLING(W)(W)

(BTU/h)

RUNNING CURRENTCOOLINGCOOLING

INPUT

(A)RUNNING CURRENTRUNNING CURRENT

(W)

E.E.R

(A)(A)COOLING

(BTU/W.h)E.E.RE.E.R

RUNNING CURRENT

INDOOR (

(BTU/W.h)(BTU/W.h)

(A)

C)INDOOR (INDOOR (

E.E.R

OUTDOOR (

C)C)

(BTU/W.h)

C)OUTDOOR (OUTDOOR (

INDOOR (

REFRIGERANT (R-22) CHARGE

C)C)

C)

EVAPORATOR

REFRIGERANT (R-22) CHARGEREFRIGERANT (R-22) CHARGE

OUTDOOR (

CONDENSER

EVAPORATOREVAPORATOR

C)

FAN, INDOOR

CONDENSERCONDENSER

REFRIGERANT (R-22) CHARGE

FAN, OUTDOOR

FAN, INDOORFAN, INDOOR

EVAPORATOR

FAN SPEEDS, FAN/COOLING/HEATING

FAN, OUTDOORFAN, OUTDOOR

CONDENSER

FAN MOTOR

FAN SPEEDS, FAN/COOLING/HEATINGFAN SPEEDS, FAN/COOLING/HEATING

FAN, INDOOR

OPERATION CONTROL

FAN MOTORFAN MOTOR

FAN, OUTDOOR

ROOM TEMP. CONTROL

OPERATION CONTROLOPERATION CONTROL

FAN SPEEDS, FAN/COOLING/HEATING

AIR DIRECTION CONTROL

ROOM TEMP. CONTROLROOM TEMP. CONTROL

FAN MOTOR

CONSTRUCTION

AIR DIRECTION CONTROLAIR DIRECTION CONTROL

OPERATION CONTROL

PROTECTOR

CONSTRUCTIONCONSTRUCTION

ROOM TEMP. CONTROL

COMPRESSORPROTECTORPROTECTOR

AIR DIRECTION CONTROL

FAN MOTOR

COMPRESSORCOMPRESSOR

CONSTRUCTION

POWER CORD

FAN MOTORFAN MOTORPROTECTOR

DRAIN SYSTEM

POWER CORDPOWER CORD

COMPRESSOR

NET WEIGHT

DRAIN SYSTEMDRAIN SYSTEM

FAN MOTOR

(lbs/kg)NET WEIGHTNET WEIGHT

POWER CORD

OUTSIDE DIMENSION (inch)

(lbs/kg)(lbs/kg)

DRAIN SYSTEM

(W x

OUTSIDE DIMENSION (inch)OUTSIDE DIMENSION (inch)

NET WEIGHT

H(W x(W x

(lbs/kg)

xHH

OUTSIDE DIMENSION (inch)

D) x x(W x (mm)D) D) H (mm)(mm) x

1ø, 115V, 60Hz

D)

8,000

1ø, 115V, 60Hz1ø, 115V, 60Hz

(mm)

8,0008,0008,000 10,0008,0008,000

1ø, 115V, 60Hz

820

10,00010,0008,000

820820

8,000

1,020

10,000

7.3

1,0201,020820

7.37.3 9.4

1,020

9.8

9.49.47.3

9.89.8 9.8

9.4

26.7(DB)* 19.4(WB)**

9.89.89.8

35(DB)* 23.9(WB)**

26.7(DB)* 19.4(WB)**26.7(DB)* 19.4(WB)**

35(DB)* 23.9(WB)**35(DB)* 23.9(WB)**

9.8

(13.1 oz)

26.7(DB)* 19.4(WB)**

480g(16.9 oz)420g(14.8 oz)

35(DB)* 23.9(WB)**

2 ROW 11 STACKS, LOUVER-FIN TYPE

480g(16.9 oz)480g(16.9 oz)370g

2 ROW 15 STACKS, STRAGHT TYPE

2 ROW 11 STACKS, LOUVER-FIN TYPE2 ROW 11 STACKS, LOUVER-FIN TYPE

TURBO FAN

2 ROW 15 STACKS, STRAGHT TYPE2 ROW 15 STACKS, STRAGHT TYPE

480g(16.9 oz)

PROPELLER TYPE FAN WITH SLINGER RING

TURBO FANTURBO FAN

2 ROW 11 STACKS, LOUVER-FIN TYPE

3/3

PROPELLER TYPE FAN WITH SLINGER RINGPROPELLER TYPE FAN WITH SLINGER RING

2 ROW 15 STACKS, STRAGHT TYPE

6 POLES

3/33/3

TURBO FAN

REMOTE CONTROLLER

6 POLES6 POLES

PROPELLER TYPE FAN WITH SLINGER RING

THERMISTOR

REMOTE CONTROLLERREMOTE CONTROLLER

3/3

VERTICAL LOUVER (RIGHT & LEFT)

THERMISTORTHERMISTOR

6 POLES

HORIZONTAL LOUVER (UP & DOWN)

VERTICAL LOUVER (RIGHT & LEFT)VERTICAL LOUVER (RIGHT & LEFT)

REMOTE CONTROLLER

TOP DOWN CHASSIS

HORIZONTAL LOUVER (UP & DOWN)HORIZONTAL LOUVER (UP & DOWN)

THERMISTOR

OVERLOAD PROTECTOR

TOP DOWN CHASSISTOP DOWN CHASSIS

VERTICAL LOUVER (RIGHT & LEFT)

INTERNAL THERMAL PROTECTOR

OVERLOAD PROTECTOROVERLOAD PROTECTOR

HORIZONTAL LOUVER (UP & DOWN)

3 WIRE WITH GROUDING

INTERNAL THERMAL PROTECTORINTERNAL THERMAL PROTECTOR

TOP DOWN CHASSIS

ATTACHMENT PLUG (CORD-CONNECTED TYPE)

3 WIRE WITH GROUDING3 WIRE WITH GROUDING

OVERLOAD PROTECTOR

DRAIN PIPE OR SPLASHED BY FAN SLINGER

ATTACHMENT PLUG (CORD-CONNECTED TYPE)ATTACHMENT PLUG (CORD-CONNECTED TYPE)

INTERNAL THERMAL PROTECTOR

62/28

DRAIN PIPE OR SPLASHED BY FAN SLINGERDRAIN PIPE OR SPLASHED BY FAN SLINGER

3 WIRE WITH GROUDING

71/3262/2862/28

ATTACHMENT PLUG (CORD-CONNECTED TYPE)

62/28 71/3271/32

DRAIN PIPE OR SPLASHED BY FAN SLINGER

19

62/2862/28 62/28

919 19

71/32

/99

62/28

16//19 x 1216169 3x 12x 12/ /3316 8//x 12 x 19883 3x 19x 19/ /338 8//x 19

497 x 315 x 492

883

LWHD8000R

497 x 315 x 492497 x 315 x 492

/8

497 x 315 x 492

LWHD8000RY5 LWHD1000RMODELSITEMS

MODELSMODELSITEMSITEMS

OPERATING

MODELS

CONDITION

OPERATINGOPERATING

ITEMS

* D

CONDITIONCONDITION

B* D* D

OPERATING

: dry bulbBB

CONDITION

** WB : wet bulb : dry bulb : dry bulb* D

** WB : wet bulb** WB : wet bulbB : dry bulb

** WB : wet bulb

Service Manual 7

820820820

7.3

820

7.37.3

9.89.8

7.3

9.89.89.89.89.89.8

LWHD8000RY6


Installation

Installation

Select the Best Location

Installation Check

How to Secure the Drain Pipe

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

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

3. The outside of the cabinet must extend outward for at least12" and there should be no obstacles, such as a fence orwall, within 20" from the back of the cabinet because it willprevent heat radiation of the condenser.Restriction of outside air will greatly reduce the cooling effi-ciency of the air conditioner.

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

4. Install the unit slanted slightly so the back is slightly lowerthan the front (about 1/4"). This will force condensed waterto the outside.

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

The setting conditions must be checked prior to initial starting.The following items are especially important checking points when the installation is finished.1. Grounding wire (Green or Green and Yellow) is provided in the power cord. The green wire must be grounded.2. Connect to a single-outlet 15A circuit.

(or 20A circuit for Electric Heater Model)3. To avoid vibration or noise, make sure the air conditioner is installed securely.4 Avoid placing furniture or draperies in front of the air inlet and outlet.

In humid weather, excess water may cause the Base Pan tooverflow. To drain the water, remove the Drain Cap and securethe Drain Pipe to the rear hole of the Base Pan. (Figure. 2)

Figure 2

ABOUT / "

Over 20"

HEATRADIATION

FENCEAWNING

OUTSIDE INSIDE

COOLED AIR

30"-

60"

14

Figure 1

Drain Pipe Drain Cap

Service Manual 9

Installation

How to Install

Window Requirements

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

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

2. If storm window presents interference, fasten a 2" widewood strip to the inner window sill across the full width ofthe sill. The wood strip should be thick enough to raisethe height of the window sill so that the unit can beinstalled without interference by the storm windowframe. See Figure. 4. Top of wood strip should beapproximately 3/4" higher than the storm window frame(STORM WINDOW FRAME) or wood strip (OUT-DOORS) to help condensation to drain properly to theoutside.

3. Install a second wood strip (approximately 6" long by 11/2"wide and same thickness as first strip) in the center of theouter sill flush against the back off the inner sill. This willraise the L bracket as shown Figure. 4.

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

Installation

NOTICE

OUTDOORSINDOORS

INNERSILL

OUTERSILL

INNERSILL

WOOD STRIP MOUNTEDON TOP OF INNER SILL

WOOD STRIPFOR L BRACKET

3/4"CLEARANCE

1" MAX.

STORMWINDOWFRAME

OUTDOORSINDOORS

OUTERSILL

Figure 3

Figure 4

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)

10m

m

TYPE B: 5EA(WOOD SCREW)

16m

m

TYPE G: 1EA(SUPPORT BACKET)

DRAIN PIPE


Installation

BEFORE INSTALLATION1. Insert the guide panels into the guides of the air conditioner.

Fasten the curtains to the unit with screws (TYPE A) asshown Figure. 5.

2. Cut the adhesive-backed seal strip (TYPE D) to the windowwidth.Remove the backing from the seal strip and attach the sealstrip to the underside of the bottom window. (Figure. 6)

NOW START INSTALLATION1. LOCATING UNIT IN WINDOW

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

2. ATTACH L BRACKETa. Install the L brackets behind the inner window sill, with

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

b. The bracket helps to hold unit securely in place. Be sureto place bracket edge flush against back of inner sill. SeeFigure. 7.

CAUTION: During the following step, holdunit firmly until window sash is lowered to top

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

3. INSTALL THE AIR CONDITIONER IN THE WINDOWa. Carefully lift the air conditioner and slide it into the open

window. Make sure the bottom guide of the air condition-er drops into the notches of the L bracket. See Figure. 8.

IMPORTANT :When the air conditioner drops into the L bracket, the air con-ditioner will be centered in window opening as shown inFigure. 9.

b. While steadying the air conditioner, carefully bring thewindow sash down behind the upper guide of the air con-ditioner, as shown in Figure. 10.

ROOM SIDE

CENTER LINE

INNER SILL

SEAL STRIP(TYPE D)

OUTSIDE

INSIDE

L BRACKET

OUTER SILL

SHORT SIDE

INNER SILLTYPE A

8"

8"

CENTER LINE

SEALWINDOW FRAME

BOTTOMGUIDE

ABOUT 1/4"

L BRACKET

UPPER GUIDE

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Type A

Type A

C enter Line

F

T E MP

F 1 L OWF 2 ME DF 3 HIG H

Dry T imer

Fan

E nergyS aver

C ool

Service Manual 11

Installation

4. SECURE THE GUIDE PANELSExtend the guide panels (TYPE F) to fill the windowopening using 4 screws (TYPE B) to secure them, asshown in Figure. 11.

5. INSTALL THE SASH SEAL AND SASH LOCKa. Cut the sash seal (TYPE E) to the window width. Stuff

the sash seal between the glass and the window toprevent air and insects from getting into the room, asshown in Figure. 11.

b. Fasten the L bracket using a (TYPE A) screw, asshown in Figure. 11.

6. Window installation of room air conditioner is nowcompleted. See ELECTRICAL DATA for attachingpower cord to electrical outlet.

REMOVAL FROM WINDOWTrun the air conditioner off, disconnect thepower cord, remove the L bracket and thescrews installed through the top and bottomof the guide panels, and save for reinstalla-tion later. Close the guide panels. keeping afirm grip on the air conditioner, raise thesash, and carefully tilt the air conditionerbackward, draining any condensate water.Lift the air conditioner from the window adremove the sash seal from between the win-dows.

NOTICE

Figure 11

Type B

Sash Seal(Type F)

L Bracket

Type A


Operation

Operation• Designed for COOLING ONLY.• Powerful and quiet cooling.• Top-down chassis for the simple instal-

lation and service.• Low air-intake, top cooled-air discharge.

• Built-in adjustable Thermistor• Washable one-touch filter• Compact size• Equipped with reliable and efficient rotary

compressor.

REMOTE CONTROLDISPLAY

'F

TIMER POWERMODE

TEMP

FANSPEED

F1 LOWF2 MEDF3 HIGH

Dry Timer

Fan

EnergySaver

Cool Power

Temp

Fan Speed

Timer Mode

1

2

3

4

51

2

6

3 45

PRECAUTION: The Remote Control unit will not function properly if strong light strikes the sensor windowof the air conditioner or if there are obstacles between theRemote Control unit and the air conditioner.

POWER BUTTONTo turn the air conditioner ON, push the button. To turn the air conditioner OFF, push the button again.This button takes priority over any other buttons.ROOM TEMPERATURE SETTING BUTTONThis button can automatically control the temperature of the room. The temperature can be set within a range of 60°F to86°F by 1°F. (16°C to 30°C by 1°C)Select the lower number for lower temperature of the room.OPERATION MODE SELECTION BUTTONEvery time you push this button, it will shift among COOL, ENERGY SAVER, FAN and DRY.- Energy Saver: If Energy Save mode is selected, the fan stops when the compressor stops cooling.a

Approximately every 3 minutes the fan will turn on and check the room air to determine if cooling is needed.FAN SPEED SELECTOREvery time you push this button, it is set as follows. (Hi [F3] ➔ Low [F1] ➔ Med [F2] ➔ Hi [F3] ➔ Low [F1] ➔ ...)ON/OFF TIMER BUTTONYou can set the time when the unit will turn on or turn off automatically by pressing the timer button. If the unit is operating,this button controls the time it will be turned off. If the unit is off state, this button controls the time it will start. Every timeyou push this button, the remaining time will be set as follows.- Stopping operation

(1Hour ➔ 2Hours ➔ 3Hours ➔ 4Hours ➔ 5Hours ➔ 6Hours ➔ 7Hours ➔ 8Hours ➔ 9Hours ➔ 10Hours ➔ 11Hours ➔12Hours ➔ 0Hour ➔ 1Hour ➔ 2Hours ➔... )

- Starting operation(1Hour ➔ 2Hours ➔ 3Hours ➔ 4Hours ➔ 5Hours ➔ 6Hours ➔ 7Hours ➔ 8Hours ➔ 9Hours ➔ 10Hours ➔ 11Hours ➔12Hours ➔ off ➔ 1Hour ➔ 2Hours ➔ ... )

REMOCON SIGNAL RECEIVER

Function of Controls

Service Manual 13

Disassembly

Disassembly

Mechanical Parts

— Before the following disassembly, set the CONTROL BOX to OFF and disconnect the power cord.

1. Front Grille1. Open the lnlet grille downward and remove the air filter.2. Remove the screw that fastens the front grille.(See

Figure 12)3. Pull the front grille from the right side.4. Remove the front grille.(There are 4 hooks.)5. Re-install the components by referring to the removal

procedure, above.

2. Cabinet1. After disassembling the FRONT GRILLE, remove the 6

screws that fasten the cabinet at both sides.2. Remove the 2 screws that fasten the cabinet at back.3. Lift the cabinet from the unit. 4. Remove the cabinet.5. Re-install the components by referring to the removal

procedure, above.

3. Control Box1. Remove the front grille. (Refer to section 1)2. Remove the cabinet. (Refer to section 2)3. Remove the 1 screw which fasten the power cord.4. Disconnect the grounding screw from the evaporator

channel.5. Remove the 2 screws that fastens the control box cover.6. Remove the housing that connects PCB and motor

wire in the control box.7. Remove the nut that fastens the terminal cover.8. Remove the terminal cover.9. Remove all the leads from the overload protector.10. Discharge the capacitor by placing a 20,000 ohm

resistor across the capacitor terminals.11. Raise the control box upward completely.

(See Figure 14)12. Re-install the components by referring to the removal

procedure, above. (Refer to the wiring diagram found on page 21 in thismanual and on the control box.)

Figure 12

Figure 13

Figure 14


Disassembly

Figure 15

Figure 16

Figure 17

Figure 18

4. Air Guide and Turbo Fan1. Remove the front grille. (Refer to section 1)2. Remove the cabinet. (Refer to section 2)3. Remove the control box. (Refer to section 3)4. Remove the 4 screws that fasten the brace.5. Remove the brace.6. Remove the 2 screws that fasten the air guide

upper.7. Remove the air guide upper.(See Figure 15)8. Remove the 2 screws that fasten the evaporator.9. Move the evaporator forward and pulling it upward

slightly. (See Figure 16)10. Pull out the hook of orifice by pushing the tabs

and remove it. (See Figure 16)11. Remove the clamp with hand pliers which

secures the turbo fan.12. Remove the turbo fan.13. Remove the 2 screws that fasten the air guide

from the base pan.14. Move the air guide backward, and pull out from

the base pan.(Move the air giude lower carefully.)15. Re-install the components by referring to the

removal procedure, above.

5. FAN1. Remove the cabinet. (Refer to section 2)2. Remove the brace (Refer to section 4)3. Remove the 5 screws which fasten the condenser.4. Move the condenser to the left carefully.5. Remove the clamp that secures the fan.6. Remove the fan. (See Figure 17)7. Re-install by referring to the removal procedure.

Air Handling Parts

6. Shroud1. Remove the fan. (Refer to section 2.2.2)2. Remove the shroud. (See Figure 18)3. Re-install the components by referring to the


7. Overload Protector1. Remove the cabinet. (Refer to section 2)2. Remove the nut that fastens the terminal cover.3. Remove the terminal cover. (See Figure 19)4. Remove all the leads from the overload protec-

tor.5. Remove the overload protector.6. Re-install the components by referring to the


8. Compressor1. Remove the cabinet. (Refer to section 2)2. Discharge the refrigerant system using a

FreonTM Recovery System.If there is no valve to attach the recovery sys-tem, install one (such as a WATCO A-1) beforeventing the FreonTM. Leave the valve in placeafter servicing the system.

3. Remove the overload protector. (Refer to sec-tion 7)

4. After purging the unit completely, unbraze thesuction and discharge tubes at the compressorconnections.

5. Remove the 3 nuts and the 3 washers which fasten the compressor.

6. Remove the compressor. (See Figure 20)7. Re-install the components by referring to the


Service Manual 15

Disassembly

Electrical Parts

Figure 19

Figure 20

9. Capacitor1. Remove the control box. (Refer to section 3)

2. Open the top cover from the control box.(See Figure 21)

3. Pull out the capacitor from the control box.

4. Disconnect all the leads of capacitor terminals.

5. Re-install the components by referring to theremoval procedure, above.

Figure 21


Disassembly

10. Power Cord1. Remove the control box. (Refer to section 3)

2. Open the top cover from the control box.(Refer to section 9)

3. Disconnect the front panel from the control box.(See Figure 22)

4. Disconnect two leads from the capacitor andrelay.

5. Pull out the power cord.

6. Re-install the component by referring to theabove removal procedure, above.(Use only one ground-marked hole for groundconnection.)

7. If the supply cord of this appliance is damaged, itmust be replaced by the special cord. (The special cord means the cord which has thesame specification marked on the supply cordattached at the unit.)

11. Motor1. Remove the cabinet. (Refer to section 2)

2. Remove the turbo fan. (Refer to section 4)

3. Remove the fan. (Refer to section 5)

4. Remove the 4 screws that fasten the motor fromthe air guide. (See Figure 23)

5. Remove the motor.

6. Re-install the components by referring to theremoval procedure, above.(See Figure 23)

Figure 23

Figure 22

Service Manual 17

Disassembly

12. Condenser

CAUTION: Discharge the refrigerantsystem using a FreonTM Recovery

System. If there is no valve to attach therecovery system, install one (such as aWATCO A-1) before venting the FreonTM.Leave the valve in place after servicingthe system.

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

2. Remove the 4 screws that fasten thebrace.(Refer to section 4)

3. Remove the 5 screws that fasten the condenserand shroud.

4. After discharging the refrigerant completely,unbraze the interconnecting tube at the con-denser connections.

5. Remove the condenser.

6. Re-install the components by referring to notes.(See Figure 23)

13. Evaporator1. Remove the control box.(Refer to section 3)

2. Remove the air guide upper. (Refer to section 4)

3. Remove the 2 screws that fasten the evapora-tor.

4. Move the evaporator sideways carefully.(Refer to section 4)

5. After discharging the refrigerant completely,unbraze the interconnecting tube at the evapo-rator connections.

6. Remove the evaporator.

7. Re-install the components by referring to notes.(See Figure 24)

Refrigerating Cycle

14. Capillary Tube1. Remove the cabinet. (Refer to section s2)2. After discharging the refrigerant completely,

unbraze the interconnecting tube at the capillarytube.(See caution above)

3. Remove the capillary tube.4. Re-install the components by referring to notes.

Figure 23

Figure 24


Disassembly

— Replacement of the refrigeration cycle.1. When replacing the refrigeration cycle, be sure to

Discharge the refrigerant system using a FreonTM

recovery System.If there is no valve to attach the recovery system,install one (such as a WATCO A-1) before ventingthe FreonTM. Leave the valve in place after servicing the system.

2. After discharging the unit completely, remove thedesired component, and unbraze the pinch-offtubes.

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

4. Solder the pinch-off tubes with Service valves.5. Evacuate as follows.

1) Connect the vacuum pump, as illustrated figure25A.

2) Start the vacuum pump, slowly open manifold valves A and B with two full turns counterclock-wise and leave the valves open.The vacuum pump is now pulling through valvesA and B up to valve C by means of the manifoldand entire system.

CAUTION: If high vacuum equip-ment is used, just crack valves A

and B for a few minutes, then open slowlywith the two full turns counterclockwise.This will keep oil from foaming and beingdrawn into the vacuum pump.

3) Operate the vacuum pump vaccum for 20 to 30minutes, until 600 microns of vaccum isobtained. Close valves A and B, and observevacuum gauge for a few minutes. A rise in pres-sure would indicate a possible leak or moistureremaining in the system. With valves A and Bclosed, stop the vacuum pump.

4) Remove the hose from the vacuum pump andplace it on the charging cylinder. See figure25B.Open valve C.Discharge the line at the manifold connection.

5) The system is now ready for final charging.

6. Recharge as follows :1) Refrigeration cycle 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 you installed as the system was opened.

2) Connect the charging cylinder as shown in figure 25B.With valve C open, discharge the hose at themanifold connection.

3) Open valve A and allow the proper charge to enter the system. Valve B is still closed.

4) If more charge is required, the high-side will not take it. Close valve A.

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.c. Turn off valve B and allow pressure to drop.d. Repeat steps b. and c. until the balance of the

charge is in the system.6) When satisfied the unit is operating correctly,

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

NOTICE

Service Manual 19

Disassembly

Equipment needed: Vacuum pump, Charging cylinder, Manifold gauge, Brazing equipment. Pin-off tool capableof making a vapor-proof seal, Leak detector, Tubing cutter, Hand Tools to remove components, Service valve.

A

COMPOUND GAUGE

EVAPORATOR(LOW PRESSURE SIDE)

COMPRESSOR

CAPILLARY TUBE

CONDENSER(HIGH PRESSURE SIDE)

SEE INSETSBELOW

MANIFOLDGAUGE

B

Figure 25A-Pulling Vacuum Figure 25B-Charging

A

B

EXTERNALVACUUM PUMP

A

CHARGINGCYLINDER

LOW HI

B

C


Schematic Diagram

33

22

11

HV

B

5V

b c

R04

P X O

O X

5VR

04P

8

EE

PR

OM

Mod

el

1

EE

PR

OM

A0

5V S71

36IC

01A

3.6V 21

R01

A20

K

3

+

10V

1uF

C02

AC

AT

93C

46 Vcc

Aut

o R

esta

rt

Non

Aut

o R

esta

rt

20K

R03

P20

K

57 6

R02

P

Q03

G

1KR04

P

A10

1SQ

01G

A10

1SQ

02G

SW

03G

D03

G

SW

06G

D06

G

TE

MP

UP

D02

G

D05

G

SW

02G

MO

DE

SW

05G

TE

MP

DO

WN

ON

/OF

F

D01

G

D04

G

FA

N

SW

01G

TIM

ER

SW

04G

A10

1S

42 3A

2

GN

D

A1

10K

R06

P

R05

P10

KR

x

SD

A

SC

L

Dig

it4 (

Sca

n4)

0.00

1C

01F

R01

F10

K

C02

F0.

001

R03

F10

K

Dig

it1 (

Sca

n1)

SE

G-c

SE

G-a

SE

G-b

Dig

it0 (

Sca

n0)

Dig

it2 (

Sca

n2)

Dig

it3 (

Sca

n3)

SC

L

SD

A

WP

0.01

C01

A

50V

1MR01

B

OS

C01

BR

T8.

00M

G

1%12.1

KR

02H

6.2K

1%R04

H

5V

2 1 CN

-TH

1S

MA

W20

0-02

2

11

2

5V

12

TEST

1413

891011

1619

18

VSS

VAref

1715Osc in

Osc out

/Reset

2120

22

24 25 2623

5V

4WA

Y

SY

NC

LOW

CO

MP

Pipe TH

Option1

Option2

Room TH

567 1234

MIC

OM

TM

P87

CH

47U

SEG-d44

SEG-e

SEG-f

4342

VDD40

SEG-g

3837

KEY0

39 SLIDE SW

41

27 28 29 31 32 3330

ION

ME

D HI

Rec

eive

r

LED

out

3

Buz

zer

3635

34

LED out0

LED out1

LED out2

KEY1

HV

B

R22

H

1%12.1

KR

21H

12.1

K 1%

OR

2H

7 456

9 8 7

OR

1H

131211105V

12

98

IC01

M

1K

R02

E20

GN

D

Vou

t

RE

CE

IVE

R

Vcc

R01

L

5 4

12V

+

5V

10V

220

C02

L

ULN

2004

A

1615143

6

680p

FC

01L

R01

P20

K 50V

3

Dig

it0

510

a

f

a

b

Dig

it1a

3 9b

8c d

f

d

e

d

c

7e

4f

1g

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6g

g

CO

OL

DE

FR

OS

T

DR

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TIM

ER

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N

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AV

ER

R02

G

R03

G

R04

G

R01

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0

680

680

680

R05

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R06

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R07

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12V

680

680

680

IC01

G

15 14 13432

161

12 11 10765

98

ULN

2004

A

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5V

5V

R12

FR

01E

1K

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01E

PK

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EP

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002

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50V

10V

220

0.01

10

12V

11 12 CN

-AC

/DC

5158

1-12

(YE

ON

HO

)52

044-

1245

(MO

LEX

)

C05

D5V12

V

I

C04

D

O78

05

IC02

D

25V

25V

0.01

0.01

AN

GLE

11 12R

x Tx

1KQ

03T

C10

4M

5V

5V Q02

TA

104M

Q01

TC

104M

Q04

TA

104M

C03

T0.

001

R01

T

25V

C02

T0.

001

D01

T1N

4148

C01

T0.

150

V

5V(R

D)

CN

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LE

CN

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2

SM

W20

0-03

SM

W25

0-02

4 65

J7

RY

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MP

RY

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AY

RY

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W

98

CN

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2

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X O

J07 O X

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RY

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RY

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RY

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CN

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7J5

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33

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2 1

12V C

N-A

C/D

C51

580-

1252

045-

1245

+

I78

12

IC01

D C03

DC

01D

D04

D+

O C02

D

16V

35V

50V

1000

1000

0.1

47

D02

D

D03

D21

PO

WE

R T

RA

NS

1N40

04D

02D

~D

05D

D05

D

ST

RA

IGH

T

RY

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RY

-ME

D

RY

-LO

W R01

J

C01

J0.

1/27

5V

1 3

1 3

5 7 9

5 7 9 33

11

CN

-PW

R

CN

-MO

TO

RY

W39

6-09

AV

YW

396-

03A

V

SV

C27

1D-1

4AZ

NR

01J

SV

C27

1D-1

4A

RY

-CO

MP

G4A

-1A

-E-L

G

FU

SE

250V

T3.

15A

120

1/2W

CA

PA

CIT

OR C

MA

IN P

OW

ER

MO

TO

RF

AN

CO

MP

FA

N

HE

RM

RO

OM

-TH

88 S

EG

ME

NT

Electronic Control Device

Schematic Diagram

Service Manual 21

Schematic Diagram

Wiring Diagram

MOTOR ASSY

CAPACITOR

COMPRESSOR

OVERLOAD PROTECTOR

DC PCB ASSEMBLY

AC PCB ASSEMBLY

THERMISTOR

PLASMA FILTER ASSY

1

2

3

4

5

6

7

8

1

1

1

1

1

1

1

1

S

S

S

S

S

S

S

S

LOCATIONNO.

DESCRIPTION REMARKSQ'TYPER SET

MOTOR

COMP.

CAPACITOR

DC PCBASSEMBLY

THERMISTOR

AIR FILTERASSEMBLY

AC PCBASSEMBLY

WIRING DIAGRAM

SWITCH

H.V.ASSEMBLY

BKCN-MOTOR

CN-PWR

DC12V

ZNR

01J

CN-12V

CN-HVB

RY-COMP3

4

FUSE

250V/T3.15A

RY-

LOW

RY-

ME

D

RY-

HI

CN-AC/DC

POWERTRANS

CN-AC/DC

CN-TH1

BLRD

RDBK

BL

R

S

COLP

YLOR

YLF

C

H

WH(BL)(Ribbed)

BK(BR)(Plain)

GN/YL(GN)

GN/YL(GN)

BK

RD

OR(BR)

1

5

7

6

8

4

2

3

S: Service PartsN: Non Service Parts


Schematic Diagram

Components Location1. MAIN P.C.B ASSEMBLY

R01T

CN-HVB

C03T Q03T Q04T

C04DC05D

C01D

C02D

D02D

D03D

D04D

D05D

IC01

D

HEAT

SIN

K

QIC02DT

J5

Q01T

CN-TELECN-TH2

CN-PWR

CN-MOTOR

ZNR01J CN-4WAY

C01JR01J

E03J

E04JPOWERTRANS

FUSE250V/T3.15A

RY-COMP

E05J

E02J

J8

E01J

J6

J2

J3 RY-H

I

PC

B:6

870A

9006

8D

ASSEMBLY:6871A20417C

RY-M

EDRY

-LOW

RY-4

WAY

J7

J4

J1

D01T

C02TQ0

2T

CN-C

ONCN

-12V

CN-A

C/DC

2. DISPLAY P.C.B. ASSEMBLY

PCB:6870A90067C ASSEMBLY:6871A20418A

Service Manual 23

Troubleshooting Guide


Piping System

Figure 26 is a brief description of the important components and their function in what is called the refrigerationsystem. This will help you to understand the refrigeration cycle and the flow of the refrigerant in the cooling cycle.

MOTOR

COMPRESSOR

OIL

(LIQUID REFRIGERANT)

CAPILLARY TUBE

OUTSIDE COOLINGAIR FOR REFRIGERANTPASS THROUGH

SUCTION LINECOOL LOW PRESSURE VAPOR

COOLEDAIR

COMPLETE LIQUIDBOIL OFF POINT

LIQUIDPRESSUREDROP

ROOM AIR HEAT LOAD

VAPOR INLETHOTDISCHARGEDAIR

LIQUID OUTLET

HIGH PRESSURE VAPOR

LIQUID REFRIGERANT

LOW PRESSURE VAPOR

ROOM AIR CONITIONER

EVAPORATOR COILS CONDENSER COILS

CYCLE OF REFRIGERATION

CAPILLARY TUBE

COMPRESSOR

TURBO FAN

CONDENSER COIL

EVAPORATOR COIL

FAN

MOTOR

Figure 26




In general, possible trouble is classified in two kinds.The one is called Starting Failure which is caused from an electrical defect, and the other is ineffective AirConditioning caused by a defect in the refrigeration circuit and improper application.

Unit runs but poor cooling.

Ineffective Cooling

Check outdoor coil(heat exchanger) & the fanoperation.

Check gas leakage.

Repair gas leak.

Replacement of unit if theunit is beyond repair.

Satisfactory operation withtemperature difference ofinlet & outlet air ; 44~50°F(7~10°C)

Check heat load increase.

Clean condenser.

Not on separate circuit.

Check inside gaspressure.

Adjusting of refrigerantcharged.

Malfunction of compressor.

Replacement ofcompressor.

Check cold air circulation for smooth flow.

Dirty indoor coil(Heat exchanger)

Correct above trouble

Check clogging in refrigera-tion circuit.

Repair clogging in refrigera-tion circuit.

Obstruction at air outlet

Clogged of air filter.

Malfunction of fan

Service Manual 25


Fails to Start

Check circuit breakerand fuse.

Gas leakage of feeler bulbof thermostat

Check of control switch.

Fan only fails to start.

Improper wiring.

Defect of fan motorcapacitor.

Irregular motor resistance( ).Irregular motor insulation( ).

Replacement of fan motor.

Regular but fails to start.

Replacement of compressor(locking of rotor, metal).

Improper thermostat setting.

Loose terminal connection.

Improper wiring.

Irregular motor resistance ( )

Irregular motor insulation ( )

Replacement of compressor(Motor damaged)

Drop of power voltage.

Capacitor check.

Replacement

Compressor only fails tostart.

Defect of compressorcapacitor.

Check of power source.

Check of control switchsetting.



• Check the Fuse.• Check the wiring diagram.

Is the Trans input power AC 115V?

Is the Trans output powerabout AC 14V?

Is shorted the Trans. output?

Is output Voltage of IC01DDC 12V?


Is the voltage No.18 of MicomDC 5V?

Replace AC PCB Ass'y.

Is the connection between

AC and DC OK?

Is the reset circuit good?(The No.14 ofMicom is 5V.)


• Check the Main PCB pattern.

• Replace the Trans.

• Replace D02D~D05D.• Replace IC01D.

• Replace IC02D.

• Replace IC01A, C02A.

• Connect connector exactly.

• Check the PCB pattern.

NO

NO

NO

NO

NO

NO

NO

YES

YES

YES

YES

YES

YES

YES

NO

YES

Possible Trouble 1 The unit does not operate.

Electrical Parts Troubleshooting Guide

Service Manual 27


Possible Trouble 2 The compressor does not operate.

Possible Trouble 3 The compressor always operate.

Is setting Temp. set lower than Room

Temp.-0.5°C?

Is the voltage No.10of IC01M 0V?

• Replace IC01M.

• Select the setting Temp. to lower Number.

• Wait 3 Minutes.

Does the Unit delayfor 3 minutes?

• Replace MAIN PCB Ass'y.

Is the voltage N0.9 of IC01M DC 12V?

• Check the RY-COMP.• Check the wiring Diagram.

NO

NO

NO

YES YES

YES

YES

Is the wire connection of RY-COMP OK?

• Check the RY-COMP.

• Connect LEAD Wire to RY-COMP again.

NO

YES

NO



Possible Trouble 4 FAN does not operate.

Possible Trouble 5 The function of Energy Saver does not operate.

• Replace IC01M.

• Replace IC01M.

Is the voltage NO.1 or 2 or 4of IC01M DC 12V?

Is the voltage NO.16 or 15 or 13of IC01M 0V?

• Check the RY-Hi orRY-Med or RY-Lo.

• Check the wiring diagram.

NO

NO

YES

YES

NO

NO

YES

YES

Is the mode key pushed once more from

cool mode?

Is the voltage No.3 of CN-AC/DC of AC PCB

Ass'y DC 5V?

• Reference to OWNER'S MANUAL.

• Set the mode key to Energy Saver mode.

• Check the Energy Saver mode key.• Check the pattern of AC & DC PCB.

Service Manual 29


Possible Trouble 6 Remote controller does not operate.

Possible Trouble 7 It displays abnormally on DC PCB Ass’y.

NO

NO

NO

NO

YES

YES

YES

Is IC01G good?

Is the connection of CN-AC/DC OK?

• Replace the DC PCB Ass'y.

• Replace IC01G.

• Replace IC03G(Q01G, Q02G, Q03G for Delux Model).

• Connect connector to CN-AC/DC exactly.

Does the IC03G(Q01G, Q02G, Q03G for Delux Model)

operate normally on DC PCB Ass'y?


Is the voltage of Battery over 2.3V?

• Replace Receiver Ass'y.


Is the voltage No.10 of CN-AC/DC on DC PCB

Ass'y DC 5V?

• Replace the battery.



NO

NO

NO

YES

YES

YES




Is the Trans input power AC 115V?

Is the Trans output powerabout AC 14V?

Is shorted the Trans. output?



Is the voltage No.40 of MicomDC 5V?

Replace AC PCB Ass'y.

Is the connection between

AC and DC OK?

Is the reset circuit OK?(The No.14 ofMicom is 5V.)


• Check the AC PCB pattern.

• Replace the Trans.

• Replace D02D~D05D.• Replace IC01D.

• Replace IC02D.

• Replace IC01A, C01A.

• Connect connector exactly.


NO

NO

NO

NO

NO

NO

NO

YES

YES

YES

YES

YES

YES

YES

NO

YES

Possible Trouble 1 The unit does not operate.

Electrical Parts

Service Manual 31


Possible Trouble 2 The compressor does not operate.

Possible Trouble 3 The compressor always operate.

Is desired Temp. set lower than Room

Temp.-0.5°C?

Is the voltage No.10of IC01M 0V?

• Replace IC01M.

• Select the desired Temp. to lower Number.

• Wait 3 Minutes.

Is the Unit for 3 minutesdelay?

• Replace AC PCB Ass'y.

Is the voltage N0.9 of IC01M DC 12V?

• Check the RY-COMP.• Check the wiring Diagram.

NO

NO

NO

YES YES

YES

YES

Is the wire connection of RY-COMP OK?

• Check the RY-COMP.

• Connect LEAD Wire to RY-COMP again.

NO

YES

NO



Possible Trouble 4 FAN does not operate.

Possible Trouble 5 Remote controller does not operate.

• Replace IC01M.

• Replace IC01M.

Is the voltage NO.1 or 2 or 4of IC01M DC 5V?

Is the voltage NO.16 or 15 or 13of IC01M 0V?

• Check the RY-Hi orRY-Med or RY-Lo.

• Check the wiring diagram.

NO

NO

YES

YES


Is the voltage of Batteryover 2.3V?

• Replace Receiver Ass'y.


Is the voltage No.10of CN-AC/DC on AC PCB

Ass'y DC 5V?

• Replace the battery.



NO

NO

NO

YES

YES

YES

Service Manual 33


Possible Trouble 6 It displays abnormally on DC PCB Ass’y.

NO

NO

NO

NO

YES

YES

YES

Are IC01G and IC02GOK?


• Replace the DC PCB Ass'y.

• Replace IC01G, IC02G.

• Replace IC03G.


Does the IC03Goperate normally on AC

PCB Ass'y?



COMPLAINT CAUSE REMEDY

Check voltage at outlet. Correct if none.

Check voltage to Control Box. If none, check powersupply cord. Replace cord if circuit is open.

Connect wire. Refer to wiring diagram for terminalidentification. Repair or replace loose terminal.

Test capacitor.Replace if not within ±10% of manufacturer's rating.Replace if shorted, open, or damaged.

Fan blade hitting shroud or blower wheel hittingscroll. Realign assembly.

Units using slinger ring for condenser fan must have1/4 to 5/16 inch clearance to the base. If it hits thebase, shim up the bottom of the fan motor withmounting screw(s).

Check fan motor bearings; if motor shaft will notrotate, replace the motor.

Check voltage. If not within limits, call an electrician.

Test capacitor.Check bearings. Does the fan blade rotate freely?If not, replace fan motor.

Pay attention to any change from high speed tolow speed. If the speed does not change, replace themotor.

If cracked, out of balance, or partially missing,replace it.

If cracked, out of balance, or partially missing,replace it.

Tighten it.

If knocking sounds continue when running or loose,replace the motor. If the motor hums or noiseappears to be internal while running, replace motor.

Check voltage. If not within limits, call an electrician.

Check the wire connections, if loose, repair orreplace the terminal. If wires are off, refer to wiringdiagram for identification, and replace. Check wirelocations. If not per wiring diagram, correct.

No power

Power supply cord

Wire disconnected or con-nection loose

Capacitor (Dischargecapacitor before testing.)

Will not rotate

Revolves on overload.

Fan

Turbo

Loose clamper

Worn bearings

Voltage

Wiring

Fan motor will not run.

Fan motor runs intermittently

Fan motor noise.

Compressor will not run,but fan motor runs.

Service Manual 35


COMPLAINT CAUSE REMEDY

Check the TEMP control. If not at the lowest number,set TEMP control to this setting and restart the unit. Check the continuity of the thermistor. Replace thethermistor if the circuit is open.

Check the capacitor.Replace if not within ±10% of manufacturers rating.Replace if shorted, open, or damaged.

Check the compressor for open circuit or ground. Ifopen or grounded, replace the compressor.

Check the compressor overload, if externally mount-ed. Replace if open. (If the compressor temperatureis high, remove the overload, cool it, and retest.)

Check the voltage.If not within limits, call an electrician.

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

If not running, determine the cause. Replace ifrequired.

Remove the cabinet. inspect the interior surface ofthe condenser; if restricted, clean carefully with a vac-uum cleaner (do not damage fins) or brush. Clean theinterior base before reassembling.

If condenser fins are closed over a large area on thecoil surface, head pressures will increase, causingthe compressor to overload. Straighten the fins orreplace the coil.

Test capacitor.

Check the terminals. If loose, repair or replace.

Check the system for a restriction.

If restricted, clean of replace.

Close if open.

Determine if the unit is properly sized for the area tobe cooled.

Check the set screw or clamp. If loose or missing,correct. If the turbo or fan is hitting air guide,rearrange the air handling parts.

Remove the cabinet carefully and rearrange tubingnot to contact cabinet, compressor, shroud, and barri-er.

Thermistor

Capacitor (Dischargecapacitor before servicing.)

Compressor

Overload

Voltage

Overload

Fan motor

Condenser air flow restric-tion

Condenser fins (damaged)

Capacitor

Wiring

Refrigerating system

Air filter

Exhaust damper door

Unit undersized

Turbo or fan

Copper tubing

Compressor will not run,but fan motor runs.

Compressor cycles onoverload.



Insufficient cooling or heat-ing

Excessive noise


Exploded View

Exploded View

130910

149980

346811359012

W48602

349001-2

268714268712

238310

W0CZZ 135500

249950

147581

147582

559011

349480

552102

352113

352115

263230

237200

W48602

352390

148000

354212

267110

152312

152302

264110

130410

550140

35211A

554160

567502

135312

135313

554030Owner's Manual

738290

Service Manual 37

Replacement Parts List

Replacement Parts List

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

DESCRIPTIONPART NO.

REMARKLOCATION

NO.

130410

130910

135312

135313

135500

147581

147582-1

147582-2

148000

159980

152302

237200

249950

268712

238310

268714

263230

264110

346811

349001-1

349001-2

349480

352115

35211A

352113

552111

552102

352390

354212

554030

550140

554160

559010

359012

267110

W48602

W0CZZ

BASE ASSEMBLY,WELD[SINGLE]

CABINET ASSEMBLY,SINGLE

GRILLE ASSEMBLY,FRONT(SINGLE)

GRILLE,INLET

COVER

LOUVER,HORIZONTAL

LOUVER,VERTICAL

LOUVER,VERTICAL

BRACE

SHROUD

FILTER ASSEMBLY,AIR CLEANER

PANEL,CONTROL

CONTROL BOX ASSEMBLY,SINGLE

PWB(PCB) ASSEMBLY,MAIN(AC)

ESCUTCHEON

PWB(PCB) ASSEMBLY,MAIN(DC)

THERMISTOR ASSEMBLY

POWER CORD ASSEMBLY

MOTOR ASSEMBLY,SINGLE

DAMPER,VENTILATION

DAMPER,VENTILATION

ORIFICE

TUBE ASSEMBLY,EVAPORATOR IN

TUBE ASSEMBLY,SUCTION SINGLE

TUBE ASSEMBLY,DISCHARGE SINGLE

TUBE ASSEMBLY,CONDENSER OUT

TUBE ASSEMBLY,CAPILLARY

AIR GUIDE ASSEMBLY

EVAPORATOR ASSEMBLY,FIRST

CONDENSER ASSEMBLY,FIRST

ANTI-VIBRATION BUSH

COMPRESSOR SET

FAN, AXIAL

FAN, TURBO

REMOTE CONTROLLER ASSEMBLY

CLAMP, SPRING

CAPACITOR, DRAWING

3041A10041Q

3091A10056C

3531A24017B

3530A10239B

3550A30226A

4758A20064A

4758A20040C

4758A20040D

4800A30002C

4998A10036A

5231A20023A

3720A10111C

4995A10113L

6871A20417C

3831A10021E

6871A20418A

6323A20004P

6411A20048R

4681A20140A

4900A20020A

4900A20020B

4948A20030A

5211A25020A

5211A22017B

5211A21237A

5211A22016A

5239A20019A

5421A10043A

5403A20180A

5040AR4195A

2520UCBA002

5900A20015A

5900A20020A

6711A20034G

3H02932B

0CZZA20005B

3041A10041Q

3091A10056C

3531A24017B

3530A10239B

3550A30226A

4758A20064A

4758A20040C

4758A20040D

4800A30002C

4998A10036A

5231A20023A

3720A10111C

4995A10113L

6871A20417C

3831A20021E

6871A20418A

6323A20004P

6411A20048R

4681A20140A

4900A20020A

4900A20020B

4948A20030A

5211A25020A

5211A22017A

5211A21237A

5211A22016A

5239A20019A

5421A10043A

5403A20180A

5040AR4195A

5416A20014B

5900A20015A

5900A20020A

6711A20034G

3H02932B

0CZZA20005B

3041A10041H

3091A10056A

3531A24020A

3530A10236A

3550A30226A

4758A20069A

4758A20040C

4758A20040D

4800A30002C

4998A10036A

5231A20023A

3720A10111C

4995A10113J

6871A20417C

3831A10046A

6871A20418A

6323A20004P

6411A20037C

4681A20140A

4900A20020A

4900A20020B

4948A20030A

5211A25020A

5211A22017A

5211A21237A

5211A22016A

5239A20019A

5421A10043A

5403A20180A

5040AR4195A

5416A90007A

5900A20015A

5900A20020A

6711A20034C

3H02932B

0CZZA20005B

LWHD8000R LWHD8000RY5 LWHD1000RLWHD8000RY6

5424AR3411N 5211A23020A5210A30646A

P/NO:3828A29003C January, 2005Printed in China

room air conditioner -...

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