LG LW1800PRZ3, LW1500PRY3 User Manual

LG

Room

Air Conditioner

SERVICE MANUAL

LG

MODELS: LW1800PR

LW1800ER
LW1800ERZ3
LW1500PR
LW1500PRY3
LWP1830WAL
LWP1820PDL
LWP1820PEL
LWC182PLMM0
LWC183PLMD1
LWC212PLMM0
LW1804ER
LW1800PRZ3
HBLG1803R

CAUTION

website http://www.lgservice.com

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

• ONLY FOR AUTHORIZED SERVICE PERSONNEL.

2 Room Air Conditioner

Air Conditioner Service Manual

TABLE OF CONTENTS

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

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

Outside dimensions....................................................................................................................................5

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

Installation.......................................................................................................................................................7

Select the Best Location ...........................................................................................................................7

Installation Check.......................................................................................................................................7

How to Secure the Drain Pipe....................................................................................................................7

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

Suggested Tool Requirements...................................................................................................................9

Cabinet Installation...................................................................................................................................10

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

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

Disassembly..................................................................................................................................................16

Mechanical Parts......................................................................................................................................16

Air Handling Parts ....................................................................................................................................17

Electrical Parts .........................................................................................................................................18

Refrigerating Cycle...................................................................................................................................20

Schematic Diagram.......................................................................................................................................23

Electronic Control Device.........................................................................................................................23

Wiring Diagram.........................................................................................................................................25

Components Location ..............................................................................................................................26

Troubleshooting Guide.................................................................................................................................28

Piping System ..........................................................................................................................................28

Troubleshooting Guide .............................................................................................................................29

Electrical Parts Troubleshooting Guide ....................................................................................................31

Electric Parts............................................................................................................................................35

Exploded View ..............................................................................................................................................41

Replacement Parts List ................................................................................................................................43

Service Manual 3

Safety Precautions

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.

■ 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 properties only.

Be sure not to do.

Be sure to follow the instruction.

WARNING

■ 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.

4 Room Air Conditioner

Safety Precautions

Do not modify or extend the power cord.

• There is risk or fire or electric shock.

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

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

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 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.

Sharp
edges

Gasolin

Service Manual 5

Dimensions

Dimensions

D

W

H

'

F

TIMER POWERMODE

TEMP

FAN

SPEED

F1 LOW
F2 MED
F3 HIGH

Dry Timer

Fan

Energy
Saver

Cool

W mm(inch) 660(25 31/32)

H mm(inch) 428(16

27

/32)

D mm(inch) 680(26

27

/32)

Model

Dimension

ALL MODELS

Outside Dimensions

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.

NOTICE

Symbols Used in this Manual

6 Room Air Conditioner

Specfications

Product Specifications

POWER SUPPLY

CAPACITY (BTU/h)
INPUT (W)

COOLING

RUNNING CURRENT (A)
E.E.R (BTU/W.h)
CAPACITY (BTU/h)
INPUT (W)

HEATING

RUNNING CURRENT (A)

E.E.R (BTU/W.h)
OPERATING INDOOR (°C)
CONDITION OUTDOOR (°C)
REFRIGERANT (R-22) CHARGE
EVAPORATOR
CONDENSER
FAN, INDOOR
FAN, OUTDOOR
FAN SPEEDS, FAN/COOLING/HEATING
FAN MOTOR
OPERATION CONTROL
ROOM TEMP. CONTROL

AIR DIRECTION CONTROL

CONSTRUCTION

PROTECTOR

COMPRESSOR

FAN MOTOR

POWER CORD

DRAIN SYSTEM
NET WEIGHT (lbs/kg)

OUTSIDE DIMENSION

(inch)

(W x H x D) (mm)

1ø, 208/230V, 60Hz

1ø, 115V, 60Hz

1ø, 220V, 60Hz

1ø, 220V, 60Hz

1ø, 208/230V, 60Hz

18,000 15,000 18,000 24,000

17,500/18,000

1,670 1,300 1,930 1,890 2,440

1,620/1,670

7.5 7.8 12 9.0 8.8 11.5 10.8 9.0/8.3

10.8 11.5 9.5 9.8 8.0/7.5 9.7/9.7

- 18,000 -

- 1,930 -

- 9.0 -

- 9.5 -

26.7(DB)* 19.4(WB)**
35(DB)* 23.9(WB)**

800g(28.2 oz)

670g(23.6 oz)

700g(24.7 oz), 1,070g(37.7 oz)

700g(24.7 oz)

730g(25.7 oz)

765g(27oz)

3 ROW 11 STACKS, LOUVER-FIN TYPE

2 ROW 11 STACKS, LOUVER-FIN TYPE

3 ROW 11 STACKS, LOUVER-FIN TYPE

2 ROW 19 STACKS, L-BENDED TYPE

2 ROW 16 STACKS, L-BENDED TYPE

2 ROW 19 STACKS, L-BENDED TYPE

TURBO FAN

PROPELLER TYPE FAN WITH SLINGER RING

3/3 3/3, 2/2/2 3/3

6 POLES

REMOTE CONTROLLER

THERMISTOR

VERTICAL LOUVER (RIGHT & LEFT)

HORIZONTAL LOUVER (UP & DOWN)

SLIDE IN-OUT CHASSIS

OVERLOAD PROTECTOR

INTERNAL THERMAL PROTECTOR

3 WIRE WITH GROUDING

ATTACHMENT PLUG (CORD-CONNECTED TYPE)

DRAIN PIPE OR SPLASHED BY FAN SLINGER

115/52 110/50 115/52

25 31/32 X 1627/32 X 26 27/32

660 X 428 X 680

LW1800PR
LW1800ER

LW1800ERZ3
LW1800PRZ3

LWP1830WAL

LW1500PR

LW1500PRY3

LWP1820PDL
LWP1820PEL

LWC182PLMM0 LWC212PLMM0

LW1804ER

LWC183PLMD1

HBLG1803R

MODELS

ITEMS

* DB : dry bulb ** WB : wet bulb

NOTE : Please refer to label quality on the product since this specification may be changed for improving performance.

Service Manual 7

Installation

Installation

Select the Best Location

Installation Check

How to Secure the Drain Pipe

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

2. Install the unit where the sunlight does not shine directly on the
unit.
If the unit receives direct sunlight, build an awning to shade the
cabinet.

3. There should be no obstacle, like a fence, within 20" which
might restrict heat radiation from the condenser.

4. To prevent reducing performance, install the unit so that louvers
of the cabinet are not blocked.

5. Install the unit a little obliquely outward not to leak the con­densed water into the room (about 1/2" or 1/4 bubble with level).

6. Install the unit with its bottom portion 30~60" above the floor
level.

7. Stuff the foam between the top of the unit and the wall to pre­vent air and insects from getting into the room.

8. The power cord must be connected to an independent circuit.
The green wire must be grounded.

9. Connect the drain tube to the base pan hole in the rear side if
you need to drain (consult a dealer).
Plastic hose or equivalent may be connected to the drain tube.

The setting conditions must be checked prior to initial starting.
The following items are especially important check 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 to overflow. To drain
the water, remove the DRAIN CAP and secure the DRAIN PIPE to the rear hole
of the BASE PAN. Press the drain pipe into the hole by pushing down and away
from the fins to avoid injury.

Optional

1. Install the drain pan over the corner of the cabinet where you removed
the plug with 4 (or 2) screws.

2. Connect the drain hose to the outlet located at the bottom of the drain
pan. You can purchase the drain hose or tubing locally to satisfy your
particular needs. (Drain hose is not supplied).

3. Select the most appropriate connection from among the following figures
(by considering the hole of the unit) to fit drain pan to your own unit.

About 1/2"

Over 20"

HEAT

RADIATION

FENCE

AWNING

FOAM

COOLED

AIR

30-60"

Level

1/4 Bubble

Drain pipe

Drain cap

Fig. 4

Fig. 3

Fig. 2

DRAIN
PAN

DRAIN HOSE

Fig. 1

CABINET

SCREW

Figure 1

8 Room Air Conditioner

Installation

How to Install

When Using Installation Kits

1. Window Requirements

This unit is designed for installation in
standard double hung windows with actual opening
widths from 29" to 41".
The top and bottom window sash must open suffi­ciently to allow a clear vertical opening of 16" from
the bottom of the upper sash to the window stool.

2. Installation Kits Contents

29" to 41"

18" min

Stool

Interior wall

26" min

(Without frame curtain)

Offset
Less 1

1

/4"

Sill

Exterior

■

Top retainer bar is in product package.

Left frame
curtain

Window locking
bracket

Sill

bracket

(2)

Foam-PE
(Adhesive-Backed)

Support bracket(2)

Foam strip
(Plain-Back)

Foam-PE
(Adhesive-Backed)

Drain pipe

Right frame
curtain

Type A (14)

Type B (7)

Type C (5) Type D (2)

Carriage Bolt (2) Lock Nut (4)

Service Manual 9

Suggested tool Requirements

Preparation of Chassis

1. Remove the screws which fasten the cabinet at both sides
and at the back. Keep these two screws which fasten the
cabinet at both sides for later use.

2. Slide the unit out from the cabinet by gripping the base pan
handle and pulling forward while bracing the cabinet.

3. Cut the window sash seal to the proper length. Peel off the
backing and attach the Foam-Seal to the underside of the
window sash.

4. Remove the backing from Foam-PE with 3 holes and attach
it to the bottom of the Top retainer bar.

5. Attach the Top retainer bar onto the top of the cabinet with 3
screws (Type A).

6. Insert the Frame guides into the bottom of the cabinet.

7. Insert the Frame Curtain into the Top retainer bar and
Frame guides.

8. Fasten the curtains to the unit with 10 screws (Type A) at
both sides.

SCREWDRIVER(+, -), RULER, KNIFE, HAMMER, PENCIL, LEVEL

DEFROST

HEAT

COOL

Figure 2

Figure 3

Figure 4

Figure 5

Shipping
Screws

Foam-Seal

Top retainer bar

Screw

(Type A)

Top retainer bar

Foam-PE

Frame guide

Screw

(Type A)

10 Room Air Conditioner

Installation

Cabinet Installation

1. Open the window. Mark a line on the center of the window
stool between the side window stop moldings.
Loosely attach the sill bracket to the support bracket using
the carriage bolt and the lock nut.

2. Attach the sill bracket to the window sill using the screws
(Type B).
Carefully place the cabinet on the window stool and align the
center mark on the bottom front with the center line marked
window stool.

3. Using the M-screw and the lock nut, attach the support
bracket to the cabinet track hole. Use the first track hole
after the sill bracket on the outer edge of the window sill.
Tighten the carriage bolt and the lock nut. Be sure the cabi­net slants outward.

CAUTION: Do not drill a hole in the
bottom pan. The unit is designed to
operate with approximately 1/2" of
water in bottom pan.

4. Pull the bottom window sash down behind the Top retainer
bar until they meet.

1. Do not pull the window sash down so tightly that the move­ment of Frame curtain is restricted. Attach the cabinet to the
window stool by driving the screws (Type B) through the
cabinet into window stool.

2. The cabinet should be installed with a very slight tilt

downward toward the outside.

NOTICE

Support
Bracket

Lock nut

Sill
Bracket

Carriage
Bolt
(M-Screw)

Front angle

Window stool

Window sash

Top retainer bar

Cabinet

Foam-PE

Frame curtain

Screw(Type B)

Front Angle

Sash track

Foam-PE

Cabinet
Track hole

Support
Bracket

Carriage bolt
and lock nut

Machine screw (Type D)
and lock nut

Outer edge
of window
sill

Screw(Type B)

Sill bracket

Top
retainer
bar

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Service Manual 11

Installation

5. Pull each Frame curtain fully to each window sash
track, and pull the bottom window sash down behind
the Top retainer bar until it meets.

6. Attach each Frame curtain the window sash by using
screws (Type C). (See Fig. 10)

7. Slide the unit into the cabinet. (See Fig. 11)

8. Cut the Foam-strip to the proper length and insert
between the upper window sash and the lower win­dow sash. (See Fig. 12)

9. Attach the Window locking bracket with a screw
(Type C). (See Fig. 13)

10. Attach the front grille to the cabinet by inserting the

tabs on the grille into the tabs on the front of the cab­inet. Push the grille in until it snaps into place. (See
Fig.14)

11. Lift the inlet grille and secure it with a screw (Type A)

through the front grille. (See Fig. 14)

12. Window installation of room air conditioner is now

completed.

Power Cord

Screw (Type A)

Screw

Window locking
bracket

Foam-Strip

Screw(Type C)

T

I

M

E

M

O

D

E

T

E

M

P

P

O

W

E

R

F

A

N

S

P

E

E

D

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

CAUTION: For security purpose,

reinstall screws (Type A) at cabinet's

sides.

12 Room Air Conditioner

Operation

• Designed for COOLING ONLY.

• Powerful and quiet cooling.

• Slide-in and slide-out 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.

Operation

Function of Controls

Precaution: The Remote Control unit will not function properly if strong light strikes the sensor window of the air

conditioner or if there are obstacles between the Remote Control unit and the air conditioner.

REMOTE CONTROL

DISPLAY

POWER BUTTON

To 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 BUTTON

This button can automatically control the temperature of the room. The temperature can be set within a range of 60°F to
86°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 BUTTON

Every time you push this button, it will shift among COOL, ENERGY SAVER, FAN and DRY as follows.

-

Energy Saver: If Energy Save mode is selected, the fan stops when the compressor stops cooling.

Approximately every 3 minutes the fan will turn on and check the room air to determine if cooling is needed.

COOL

ENERGY SAVER

FAN DRY

AIR

PURYFIER

ENERGY

SAVER

FAN DRY HEAT

DEFROST

COOL

INDOOR DESIRED

FAN

AUTO

RESTART

COOL

AIR

PURYFIER

FAN DRY HEAT

DEFROST

INDOOR DESIRED

FAN

ENERGY

SAVER

AUTO

RESTART

ENERGY

SAVER

COOL

AIR

PURYFIER

DRY HEAT

DEFROST

INDOOR DESIRED

FAN

FAN

AUTO

RESTART

FAN

ENERGY

SAVER

COOL

AIR

PURYFIER

HEAT

DEFROST

INDOOR DESIRED

FAN

DRY

AUTO

RESTART

LW1800PR, LW1500PR,
LWP1830WAL, LW1804ER

6

DEFROST

FAN

FAN

FAN

SPEED

DRY

HEAT

ENERGY

SAVER

AIR

PURYFIER

AUTO

RESTART

COOL

INDOOR DESIRED

TIMER MODE TEMP

POWER

12345

LW1500PRY3, LW1800PRZ3

COOL

INDOOR DESIRED

TIMER MODE

FAN

FAN

FAN

SPEED

DRY

6

7 1

ENERGY

SAVER

AIR

PURIFIER

CLEAN
FILTER

AIR

PURIFIER

TEMP

POWER

127345

4
8
5

AIR

PURIFIER

Air

Power

Purifier

Temp

Fan Speed

Sleep Mode

Swing

Timer

Auto

2

3

Service Manual 13

Operation

FAN SPEED SELECTOR

Every time you push this button, it is set as follows.
(Hi ➔ Low ➔ Med ➔ Hi ➔ Low ➔...)

ON/OFF TIMER BUTTON

You 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 time
you 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
AIR PURIFIER

• Press the Air Purifier button.
Operation will start when the button is pressed and stop when the button is pressed again.

• Set the fan speed with the remote control. You can select the fan speed in three steps high, low or medium.
Each time the button is pressed, the fan speed mode is shifted.

• If you press the only Air Purifier button, only air purifying operates.
Then, fan speed is low. You can select the fan speed in three steps high, low or medium.
Each time the button is pressed, the fan speed mode is shifed.

SLEEP MODE

• Press the sleep mode button to set the time you want the unit to turn off automatically.

• Every time you push this button, the remaining time will be set as follows.

(1Hour ➔ 2Hours ➔ 3Hours ➔ 4Hours ➔ 5Hours ➔ 6Hours ➔ 7Hours ➔ 0Hour ➔ 1Hour ➔ 2Hours ➔

...

)

• The temperature setting will be raised by 2˚F in 30 minutes and by 4˚F in 1 hour to prevent overcooling during sleep.

6

6

7

7

8

8

HIGH LOW MED

COOL

AIR

PURYFIER

ENERGY

SAVER

DRY HEAT

DEFROST

INDOOR DESIRED

FAN

FAN

AUTO

RESTART

COOL

AIR

PURYFIER

ENERGY

SAVER

DRY HEAT

DEFROST

INDOOR DESIRED

FAN

FAN

AUTO

RESTART

COOL

AIR

PURYFIER

ENERGY

SAVER

DRY HEAT

DEFROST

INDOOR DESIRED

FAN

FAN

AUTO

RESTART

14 Room Air Conditioner

REMOTE CONTROL

DISPLAY

Precaution: The Remote Control unit will not function properly if strong light strikes the sensor window of the air

conditioner or if there are obstacles between the Remote Control unit and the air conditioner.

POWER BUTTON

To 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 BUTTON

This button can automatically control the temperature of the room. The temperature can be set within a range of 60°F to
86°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 BUTTON

Every 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.

Approximately every 3 minutes the fan will turn on and check the room air to determine if cooling is needed.

FAN SPEED SELECTOR

Every time you push this button, it is set as follows.
(Hi [F3] ➔ Low [F1] ➔ Med [F2] ➔ Hi [F3] ➔ Low [F1] ➔...)

ON/OFF TIMER BUTTON

You 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 time
you 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
AUTO SWING

This button can automatically control the air flow direction.

6

6

7

7

Operation

LW1800ER

6

°F

F1 LOW
F2 MED
F3 HIGH

COOLDRY

FANTIMER

ENERGY

SAVER

FAN

TIMER MODE TEMP

SPEED

LWC182PLMM0, LWC212PLMM0

POWER

12345

53

7 6

2

5

14

Power

Temp

Fan Speed

Timer Mode

1

2
4

3

5

Temp

Fan Speed

Timer Mode

Auto

Swing

Power

1

2
4

3
7

LW1800ERZ3, HBLG1803R

Cool

Energy

Saver

Fan
Dry Timer

F1 LOW
F2 MED
F3 HIGH

TEMP

˚F

6

2

13 45

Service Manual 15

POWER BUTTON

Operation starts, when this button is pressed and stops when you press the button again.

ROOM TEMPERATURE SETTING BUTTON

Control the room temperature within a range of 16°C to 30°C. The room temperature will be adjusted by 1˚C 30min., and
by 2˚C 1 hour later.

OPERATION MODE SELECTION BUTTON

Select Cooling, Heating, or Fan mode with this button.

FAN SPEED SELECTOR

Select the fan speed. Cooling Model: 3 steps {High[F3] ➔ Low[F1] ➔ Med[F2]➔ High[F3]... }

Heating Model: 2 steps {High [F2] ➔ Low[F1] ➔ High[F2]... }

ON/OFF TIMER BUTTON

Set the time of starting and stopping operation. The timer is set by 1 hour.

SIGNAL RECEIVER
AUTO SWING

The vertical louver swings horizontally by the automatic system and stops when you press the button again.

6

6

7

7

REMOTE CONTROL

DISPLAY

■ LWP1820PDL/PEL

Operation

6

1

4
5

1

3
2

5

2
4

3
7

6

4
5

3

1

2

16 Room Air Conditioner

Disassembly

Disassembly

Mechanical Parts

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

1. Front Grille

1. Open the lnlet grille downward and remove the air filter.

2. Remove the screw that fastens the front grille.(See
Figure 15)

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. Cabinet

1. After disassembling the FRONT GRILLE, remove the 2
screws that fasten the cabinet at both sides.

2. Remove the 2 screws that fasten the cabinet at back.

3. Pull the base pan forward. (See Figure 16)

4. Remove the cabinet.

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

3. Control Box

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

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

3. Remove the 2 screws which fasten the power cord.

4. Disconnect the grounding screw from the evaporator
channel.

5. Remove the 1 screw that fastens the control box cover.

6. Remove the housing that connects PCB and motor
wire in the control box.

7. Disconnect the housing that connects Plazma Air
Purifier.(Optional)

8. Remove the screw at left cover of filter case and open
the cover to remove inner screw. (Optional)

9. Remove the nut that fastens the terminal cover.

10. Remove the terminal cover.

11. Remove all the leads from the overload protector.

12. Discharge the capacitor by placing a 20,000 ohm

resistor across the capacitor terminals.

13. Raise the control box upward completely.

(See Figure 17)

14. Re-install the components by referring to the removal

procedure, above.
(Refer to the wiring diagram found on page 25 in this
manual and on the control box.)

P

O

W

E
R

M
O

D
E

F

A

N
S
P

E

E

D

T

IM
E

R

˚C

T

E

M

P

F

1

L
O

W
F
2
M

E

D

F
3
H

I

G

H

D
r

y

T
i

m
e
r

F

a
n

E
n
e

r
g

y
S
a

v

e

r

C

o

o

l

D
E
F

R
O
S

T

H

E
A

T

C
O
O

L

I
N
D

O
O
R

D

E
S
I
R
E

D

E
N

E
R
G

Y

S
A

V
E
R
A
I
R

P
U
R

Y
F
I
E

R

A

U
T
O

R
E

S
T
A
R

T

F
A

N

F
A
N

D

R
Y

P

OW

ER

MODE

FAN

SPEED

TIMER

˚

C

TEMP

F
1
L
O
W

F

2
M
E
D

F

3
H
I
G
H

D
ry

T
im

e
r

F

a
n

E
n
e

r
g

y
S
a

v

e

r

C

o

o

l

Figure 15

Figure 15Figure 17

Figure 16

Service Manual 17

Disassembly

Figure 18

Figure 19

Figure 20

Figure 21

4. Air Guide and Turbo Fan

1. 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 18)

8. Remove the 2 screws that fasten the evaporator.

9. Move the evaporator forward and pulling it upward
slightly. (See Figure 19)

10. Pull out the hook of orifice by pushing the tabs

and remove it. (See Figure 20)

11. Remove the clamp with a hand plier that 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. FAN

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

2. Remove the brace (Refer to section 4)

3. Remove the 5 screws that 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 21)

7. Re-install by referring to the removal procedure.

Air Handling Parts

18 Room Air Conditioner

6. Shroud

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

2. Remove the shroud. (See Figure 22)

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

7. Overload Protector

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

2. Remove the nut that fastens the terminal cover.

3. Remove the terminal cover. (See Figure 23)

4. Remove all the leads from the overload protec-

tor.

5. Remove the overload protector.

6. Re-install the components by referring to the

removal procedure, above.

8. Compressor

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

2. Discharge the refrigerant system using a

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

3. Remove the overload protector. (Refer to sec-

tion 7)

4. After purging the unit completely, unbraze the

suction and discharge tubes at the compressor
connections.

5. Remove the 3 nuts and the 3 washers which

fasten the compressor.

6. Remove the compressor. (See Figure 24)

7. Re-install the components by referring to the

removal procedure, above.

Disassembly

Electrical Parts

Figure 22

Figure 23

Figure 24

Service Manual 19

Disassembly

9. Capacitor

1. Remove the control box. (Refer to section 3)

2. Open the top cover from the control box.
(See Figure 25)

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 the
removal procedure, above.

10. Power Cord

1. 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 26)

4. Disconnect two leads from the capacitor and
relay.

5. Pull out the power cord.

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

7. If the supply cord of this appliance is damaged, it
must be replaced by the special cord.
(The special cord means the cord which has the
same specification marked on the supply cord
attached at the unit.)

D

E

F

R

O

S

T

H

EAT

C

OO

L

IN

DO

OR

DE

SIRE

D

E

N

ER

GY

S

A

VE

R

AI

R

PU

RY

FIE

R

A

UT

O

RE

STA

RT

FAN

F

A

N

DRY

D
E

F
R
O

S
T

H
E
A

T

C
O

O
L

INDOOR

DES

IRED

EN

E
RG

Y

SA

V
E
R
AIR

PURYFIER
AUTO
RESTA

RT

F

A
N

F

A
N

D

R
Y

P

O

W

E

R

M

O

D

E

FA

N

SP

EED

T

IM

E

R

˚C

TEMP

F

1 L

O

W

F

2

M

E

D

F3

H

IG

H

D

ry

T

im

e

r

F

a

n

Energy

Saver

C

o

o

l

P
O

W

E
R

M
O

D
E

F
A

N
S
P
E

E

D

T
IM

E
R

˚

C

T

E

M

P

F

1

L

O

W

F

2

M

E

D

F

3

H

I

G

H

D

r
y

T

i
m
e

r

F

a
n

E
nerg

y

S

a
ve

r

C
o
o

l

Figure 26

Figure 5

20 Room Air Conditioner

Disassembly

11. Motor

1. 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 from
the air guide. (See Figure 27)

5. Remove the motor.

6. Re-install the components by referring to the
removal procedure, above.(See Figure 27)

12. Condenser
CAUTION: Discharge the refrigerant

system using a FreonTMRecovery

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

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

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

3. Remove the 5 screws that fasten the condenser
and shroud.

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

5. Remove the condenser.

6. Re-install the components by referring to notes.
(See Figure 28)

13. Evaporator

1. 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 evapora­tor.

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

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

6. Remove the evaporator.

7. Re-install the components by referring to notes.
(See Figure 29)

Figure 27

Figure 28

Figure 29

Refrigerating Cycle

Service Manual 21

Disassembly

— Replacement of the refrigeration cycle.

1. When replacing the refrigeration cycle, be sure to
Discharge the refrigerant system using a Freon

TM

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

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

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

4. Braze the pinch-off tubes with Service valves.

5. Evacuate as follows.

1) Connect the vacuum pump, as illustrated figure

30A.

2) Start the vacuum pump, slowly open manifold

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

and entire system.

CAUTION: If high vacuum equip-

ment is used, just crack valves A
and B for a few minutes, then open slowly
with the two full turns counterclockwise.
This will keep oil from foaming and being
drawn into the vacuum pump.

3) Operate the vacuum pump vaccum for 20 to 30
minutes, until 600 microns of vaccum 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.

4) Remove the hose from the vacuum pump and
place it on the charging cylinder. See figure
30B.
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
30B.
With valve C open, discharge the hose at the
manifold 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 brazing 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.

14. Capillary Tube

1. Remove the cabinet. (Refer to section s2)

2. After discharging the refrigerant completely,
unbraze the interconnecting tube at the capillary
tube.(See caution above)

3. Remove the capillary tube.

4. Re-install the components by referring to notes.

NOTICE

22 Room Air Conditioner

Disassembly

Equipment needed: Vacuum pump, Charging cylinder, Manifold gauge, Brazing equipment. Pin-off tool capable
of 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 INSETS

BELOW

MANIFOLD

GAUGE

B

Figure 30A-Pulling Vacuum

Figure 30B-Charging

A

B

EXTERNAL
VACUUM PUMP

A

CHARGING
CYLINDER

LOW

HI

B

C

Service Manual 23

Schematic Diagram

4WAY

MAIN POWER

CAPACITOR

MOTOR

FAN

35V

2

4

D02D~D05D

1N4004

SVC271D-14A

CN-PWR

FUSE

125V/T2A

ZNR01J

0.1/275V

C01J

CN-MOTOR

120 1/2W

R01J

+

+

POWER TRANS

1

7

220

C05D

10V

C06D

25V

0.01

D05D

D02D

D03D

+

C01D

1000

D04D

C03D

1000

16V

25V

C04D

0.01

7805

IC02D

O

5V

I

O

12V

50V

C02D

0.1

S/V-

CN-4WAY

33

11

IC01M

ULN2004A

16

1

12.1K

R02H

R04H

6.2K

12V

SEG-e

HVB

SEG-f

VDD

5V

SEG-d

SEG-c

Digit0 (Scan0)

SEG-a

4WAY

LOW

COMP

SYNC

Digit2 (Scan2)

Digit1 (Scan1)

Rx

Receiver

SDA

Osc in
Osc out

/Reset

R01B

3.6V

3

2

0.01

C01A

S7136

IC01A

5V

RT8.00MG

OSC01B

1

R01A

5V

Vcc

GND

RECEIVER

+

10V

220

C02L

Vout

680pF

C01L

R01L

TEST

10V

1uF

C02A

+

BZ01E

R01E

R02E

SCL

12V

ROOM-TH

CN-TH1

1

2
2

1

OR2H

OR1H

1

44

LED MODULE

Digit1

d

e

g

c

Digit2

f

Digit3

a

b

12

13

Digit0

14

a

15

FAN

1

Digit4 (Scan4)

Digit3 (Scan3)

5V

IC02G

10

R08G

R11G

R10G

R09G

R01G

5.1V

ZD02F

R03F

10K

0.001

C01F

R01F

10K

ZD01F

5.1V

C02F

0.001

7812

I

IC01D

2345678

9

10

11

43424140393837363534

22 171921 20 18 16 15 14 13 12

2324252627282930313233

7

116

125

134

143

152

161989

16151413121110

8

IC01G

765

143

2

15214313412511610

7

9

8

R22H

R21H

12.1K

12.1K

5V

SEG-b

VSS

5V

VAref
Room TH
Pipe TH
Option1
Option2

R02G

2

b

R03G

3

c

R04G

4

d

R05G

5

e

R06G

6

f

R07G

7

g

1

1

1

0

9

8

Tx

ION

MED

HI

KEY0
KEY1

LED out0
LED out1
LED out2

LED out3

Buzzer

5V

13579
13579

1

3

1

3

COMP

d

e

g

c

a

f

b

d

e

g

c

a

f

b

d

e

g

c

a

f

b

D01G

SW01G

TEMP DOWN

SW02G

D02G

ON/OFF

SW03G

D03G

TIMER

SW04G

D04G

MODE

SW05G

D05G

TEMP UP

SW06G

D06G

FAN

HERM

C

RY-COMP

G4A-1A-E-LG

RY-HI

RY-MED

RY-LOW

RY-4WAY

CN-TELE

Q01T

C104M

Q02T

A104M

5V

Q04T

A104M

Q03T

C104M

C03T

0.001

R01T

1K

D01T

1N4148

C01T

0.1

C02T

0.001

5V

RY-COMP

RY-4WAY

RY-LOW

RY-MED

RY-HI

9

IC03G

567

123

4

101213

1418151617

118

R02F

1K

R04F

1K

2

1

98765

4

5V

12V

5V

12V

111012

R01P

20K

5V

A2

SCL

SDAGND

4

5

CAT93C46

Vcc

EEPROM

WP

2

1A03

A1

786

5V

50V

25V

1%

1%

1%

1%

1M

20K

25V

12V

KID65783AP

12V

12V

ULN2004A

ULN2004A

25V

1K

PKM13EPY

1K

20

-4002

MICOM

TMP87CH47U

16

PIPE-TH

1
1

2

2

CN-TH2

R03P

20K

20K

R02P

SEG-g

FAN

TIMER

SLEEP

DEFROST

DEFROST12

COOL HEAT

INDOOR DESIRED

11

FAN(L1)

FAN(L2)

FAN(R1)

FAN(R2)

ENERGY

SAVER

AUTOAIR

FAN(R3)FAN(L3)

INDOOR

22

DESIRED

PURIFIER RESTART

680

680

680

680

680

680

680

680

680

330

330

3

11

12

10

79865

4

132

SMW200-03

SMW250-02

YW396-03AV(YL)

YW396-09AV

YW396-03AV

CN-AC/DC

51580-12

SMAW200-02

CN-AC/DC

51581-12(YEONHO)

52045-1245 52044-1245(MOLEX)

STRAIGHT ANGLE

Rx

Tx

CN-12V

SMW200-03(WH)

SW1

2

2

1

1

3

3

3
3

CN-CONT

SMW200-03(BL)

CN-HVB

SMW200-03(YL)

SW2

2
2

1
1

3

3

2

2

1

1

J5

R04P

1K

FAN

(MODE)

DRY

0.01

25V

C05D

(RD)

J7

133122

HVB

Electronic Control Device

Schematic Diagram

24 Room Air Conditioner

Schematic Diagram

33

22

11

HVB

5V

b

c

R04P

X

O

O

X

5V

R04P

8

EEPROMModel

1

EEPROM

A0

5V

S7136

IC01A

3.6V

2

1

R01A

20K

3

+

10V

1uF

C02A

CAT93C46

Vcc

Auto Restart

Non Auto Restart

20K

R03P

20K

576

R02P

Q03G

1K

R04P

A101S

Q01G

A101S

Q02G

SW03G

D03G

SW06G

D06G

TEMP UP

D02G

D05G

SW02G

MODE

SW05G

TEMP DOWN ON/OFF

D01G

D04G

FAN

SW01G

TIMER

SW04G

A101S

423

A2

GND

A1

10K

R06P

R05P

10K

Rx

SDA

SCL

Digit4 (Scan4)

0.001

C01F

R01F

10K

C02F

0.001

R03F

10K

Digit1 (Scan1)

SEG-c

SEG-a

SEG-b

Digit0 (Scan0)

Digit2 (Scan2)

Digit3 (Scan3)

SCL

SDA

WP

0.01

C01A

50V

1M

R01B

OSC01B

RT8.00MG

1%

12.1K

R02H

6.2K

1%

R04H

5V

2

1

CN-TH1

SMAW200-02

2

112

5V

12

TEST

14 13

8

9

10

11

1619 18

VSS
VAref

17 15

Osc in
Osc out

/Reset

21 2022

242526

23

5V

4WAY

SYNC

LOW

COMP

Pipe TH
Option1
Option2

Room TH

567

123

4

MICOM

TMP87CH47U

SEG-d

44

SEG-e
SEG-f

4342

VDD

40

SEG-g

3837

KEY0

39

SLIDE SW

41

27282931323330

ION

MED

HI

Receiver

LED out3

Buzzer

363534

LED out0
LED out1
LED out2

KEY1

HVB

R22H

1%

12.1K

R21H

12.1K

1%

OR2H

745

6

987

OR1H

131211

10

5V

1

2

9

8

IC01M

1K

R02E

20

GND

Vout

RECEIVER

Vcc

R01L

5

4

12V

+

5V

10V

220

C02L

ULN2004A

161514

3

6

680pF

C01L

R01P

20K

50V

3

Digit0

510

a

f

a

b

Digit1

a

3

9

b8c

d

f

d

e

d

c

7

e4f1g

e

6

g g

COOL

DEFROST

DRY/HEAT

TIMER

FAN

E/SAVER

R02G

R03G

R04G

R01G

680

680

680

680

R05G

R06G

R07G

12V

680

680

680

IC01G

151413

432

161

121110

765

98

ULN2004A

10K

5V

5V

R12F

R01E

1K

5V

C06D

BZ01E

PKM13EPY

-4002

+

C05D

50V

10V

220

0.01

10

12V

11

12

CN-AC/DC

51581-12(YEONHO)

52044-1245(MOLEX)

C05D

5V

12V

I

C04D

O

7805

IC02D

25V

25V

0.01

0.01

ANGLE

11

12

Rx

Tx

1K

Q03T

C104M

5V

5V

Q02T

A104M

Q01T

C104M

Q04T

A104M

C03T

0.001

R01T

25V

C02T

0.001

D01T

1N4148

C01T

0.1

50V

5V

(RD)

CN-TELE

CN-TH2

SMW200-03

SMW250-02

465

J7

RY-COMP

RY-4WAY

RY-LOW

9

8

CN-TH2

X

O

X

O

J07

O

X

X

O

RY-4WAY

RY-MED

RY-HI

CN-4WAY

7

J5

2

2

PIPE-TH

2

2

1

1

3

3

1

1

2

2

SW2

CN-HVB

SMW200-03(BL)

CN-CONT

SMW200-03(YL)

Model

RY-4WAY

3
3

3

3

1
1

2
2

SW1

33

11

CN-4WAY

YW396-03AV(YL)

SMW200-03(WH)

CN-12V

12V

Cool Only

Heat Pump

1
1

10

S/V-

4WAY

3

5V

2

1

12V

CN-AC/DC

51580-12

52045-1245

+

I

7812

IC01D

C03D

C01D

D04D

+

O

C02D

16V

35V

50V

1000

1000

0.1

4

7

D02D

D03D

2

1

POWER TRANS

1N4004

D02D~D05D

D05D

STRAIGHT

RY-HI

RY-MED

RY-LOW

R01J

C01J

0.1/275V

1

3

1

3

579
579

33

11

CN-PWR

CN-MOTOR

YW396-09AV

YW396-03AV

SVC271D-14A

ZNR01J

SVC271D-14A

RY-COMP

G4A-1A-E-LG

FUSE

250V/T2A

120 1/2W

CAPACITOR

C

MAIN POWER

MOTOR

FAN

COMP

FAN

HERM

ROOM-TH

88 SEGMENT

Service Manual 25

Schematic Diagram

■ MODEL : LWP1820PDL/LWP1820PEL ■ MODEL : LW1800ERZ3/LW1800PR, HBLG1803R

LW1800ER/LWP1830WAL

■ MODEL : LWC182PLMM0/LWC212PLMM0 ■ MODEL : LW1500PRY3/LW1500PR

LW1800PRZ3/LW1804ER
LWC182PLMD1

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

LOCATION NO. DESCRIPTION

REMARKS

Q'TY PER SET

1

5

7

6

8

4

2

3

MOTOR

GN/YL
(GN)

GN/YL
(GN)

BK
BL
RD
YL

OR(BR)

3854AR3563U

CN-MOTOR

CN-AC/DC

CN-AC/DC

DC PCB
ASSEMBLY

CN-TH1

ROOM

THERMISTOR
PIPE
THERMISTOR

RY-HI

RY-MED

RY-LOW

CN-TH2

RY-4WAY

CN-4WAY

REVERSING

VALVE

POWER

TRANS

SWITCH

DC12V

CN-12V

H.V.

ASSEMBLY

BK RD

AIR FILTER
ASSEMBLY

AC PCB
ASSEMBLY

RY-COMP

CN-PWR

CN-HVB

WIRING DIAGRAM

OLP

BL

COMP.

WH(BL)

(Ribbed)

BK(BR)
(Plain)

RD

BK

OR(BR)

YL

CAPACITOR

HIGH PRESSURE

SWITCH

CN-P/S

ZNR01J

FUSE

250V/T2A

(115V/T2A)

SOLENOID

VALVE

5

1

2

3

4

7

6

5

1

2

3

4

7

6

8

MOTOR

COMP.

CAPACITOR

DC PCB

ASSEMBLY

THERMISTOR

AIR FILTER
ASSEMBLY

AC PCB

ASSEMBLY

WIRING DIAGRAM

3854AR3563N

SWITCH

H.V.

ASSEMBLY

BK

CN-MOTOR

CN-PWR

DC12V

ZNR01J

CN-12V

CN-HVB

RY-COMP

3
4

FUSE

250V/T2A

(115V/T2A)

RY-LOW

RY-MED

RY-HI

CN-AC/DC

POWER

TRANS

CN-AC/DC

CN-TH1

BL
RD

RDBK

BL

R

S

C

OLP

YL
OR

YL

F

C

H

WH

(BL)

(

Ribbed

)

BK(BR

)

(

Plain

)

GN/YL

(GN)

GN/YL

(GN)

BK

RD

OR(BR

)

5

1

2

3

4

7

6

8

S: Service Parts
N: Non Service Parts

Schematic Diagram

26 Room Air Conditioner

Components Location

■

MODEL: LW1800PR/LW1800ER

LW1500PR/LWP1830WAL
LWP1820PDL/LWP1820PEL
LW1800ERZ3/LW1804ER
LWC183PLMD1

■

MODEL: LWC182PLMM0/LWC212PLMM0

LW1500PRY3/LW1800PRZ3
HBLG1803R

■

MODEL: LW1800PR/LW1500PR

LWP1830WAL

■

MODEL: LWC182PLMM0/LWC212PLMM0

LW1800ERZ3/HBLG1803R

R01T

CN-HVB

C03T

Q03T

Q04T

C04D

C05D

C01D

C02D

D02D
D03D

D04D
D05D

IC01D

HEAT SINK

QIC02DT

J5

Q01T

CN-TELE

CN-TH2

CN-PWR

CN-MOTOR

ZNR01J

CN-4WAY

C01J

R01J

E03J

E04J

POWER

TRANS

FUSE

RY-COMP

E05J

E02J

J8

E01J

J6

J2

J3

RY-HI

ASSEMBLY:6871A20167

RY-MEDRY-LOWRY-4WAY

J7

J4

J1

D01T
C02T

Q02T

CN-CONCN-12V

CN-AC/DC

J12 J13

RECEIVER C02L

J21

J22

J23

J18

J19

J17

BZ01E

SW03G

POWER

SW06G

TEMP UP

SW02G

TEMP DOWN

SW05G

MODE

SW01G

FAN SPEED

C05D

J04

CN-AC/DC

J05

J01
J02

R01G
R02G
R03G

R04G
R05G
R06G
R07G
R08G
R09G

CN-TH1

SW04G

TIMER

J2ZD02F

ZD01F

C02A

IC01A

J08J14

J15

J16

R10G

J07
J08

J09
J10

J11

IC03G

OSC01B

J24

J20

2. Display P.C.B Assembly

Service Manual 27

Schematic Diagram

■ MODEL: LW1800ER/LWP1820PDL/LWP1820PEL

■ MODEL: LW1804ER/LW1500PRY3/LW1800PRZ3/LWC183PLMD1

28 Room Air Conditioner

Troubleshooting Guide

Troubleshooting Guide

Piping System

Figure 31 is a brief description of the important components and their function in what is called the refrigeration
system. 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 COOLING
AIR FOR REFRIGERANT
PASS THROUGH

SUCTION LINE
COOL LOW PRESSURE VAPOR

COOLED
AIR

COMPLETE LIQUID
BOIL OFF POINT

LIQUID
PRESSURE
DROP

ROOM AIR HEAT LOAD

VAPOR INLET

HOT
DISCHARGED
AIR

LIQUID OUTLET

HIGH PRESSURE VAPOR
LIQUID REFRIGERANT
LOW PRESSURE VAPOR

ROOM AIR CONITIONER

EVAPORATOR COILS CONDENSER COILS

CYCLE OF REFRIGERATION

Figure 31

CONDENSER COIL

FAN

CAPILLARY TUBE

MOTOR

COMPRESSOR

TURBO FAN

EVAPORATOR COIL

Service Manual 29

Troubleshooting Guide

Troubleshooting Guide

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 Air

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

Unit runs but poor cooling.

Ineffective Cooling

Check outdoor coil
(heat exchanger) & the fan
operation.

Check gas leakage.

Repair gas leak.

Replacement of unit if the
unit is beyond repair.

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

Check heat load
increase.

Clean condenser.

Not on separate circuit.

Check inside gas
pressure.

Adjusting of refrigerant
charged.

Malfunction of compressor.

Replacement of
compressor.

Check cold air circulation
for smooth flow.

Dirty indoor coil
(Heat exchanger)

Correct above trouble

Check clogging in refrigera­tion circuit.

Repair clogging in refrigera­tion circuit.

Obstruction at air outlet

Clogged of air filter.

Malfunction of fan

30 Room Air Conditioner

Troubleshooting Guide

Fails to Start

Check circuit breaker
and fuse.

Gas leakage of feeler bulb
of thermostat

Check of control switch.

Fan only fails to start.

Improper wiring.

Defect of fan motor
capacitor.

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 to
start.

Defect of compressor
capacitor.

Check of power source.

Check of control switch
setting.

Service Manual 31

Troubleshooting Guide

• Check the Fuse.

• Check the wiring diagram.

Is the
Trans input power AC 115V?
(208/230V for LWL1230WAL)

Is the Trans output power

about AC 14V?

Is shorted the Trans. output?

Is output Voltage of IC01D

DC 12V?

Is output Voltage of IC02D

DC 5V?

Is the voltage No.18 of Micom

DC 5V?

Replace AC PCB Ass'y.

Is the

connection between

AC and DC

OK?

Is the reset circuit OK?

(The No.14 of

Micom 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

32 Room Air Conditioner

Troubleshooting Guide

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.10

of IC01M 0V?

• Replace IC01M.

• Select the setting Temp. to lower Number.

• Wait 3 Minutes.

Does the Unit delay for

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

Service Manual 33

Troubleshooting Guide

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 4

of IC01M DC 12V?

Is the voltage NO.16 or 15 or 13

of IC01M 0V?

• Check the RY-Hi or
RY-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.

34 Room Air Conditioner

Troubleshooting Guide

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 the 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 connection of

CN-AC/DC

OK?

Is the voltage No.10

of CN-AC/DC on DC PCB

Ass'y DC 5V?

• Replace the battery.

• Connect connector to

CN-AC/DC

exactly.

NO

NO

NO

YES

YES

YES

• Check the PCB pattern.

Service Manual 35

Troubleshooting Guide

• Check the Fuse.

• Check the wiring diagram.

Is the
Trans input power AC 115V?
(208/230V for LWL1230WAL)

Is the Trans output power

about AC 14V?

Is the Trans. output shorted?

Is output Voltage of IC01D

DC 12V?

Is output Voltage of IC02D

DC 5V?

Is the voltage No.40 of Micom

DC 5V?

Replace AC PCB Ass'y.

Is the

connection between

AC and DC

OK?

Is the reset circuit OK?

(The No.14 of

Micom is 5V.)

• Check the AC
PCB pattern.

• Replace the Trans.

•

Replace

D02D~D05D.

• Replace IC01D.

• Replace IC02D.

•

Replace

IC01A, C01A.

• 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.

ElectrIc Parts

36 Room Air Conditioner

Troubleshooting Guide

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.10

of IC01M 0V?

• Replace IC01M.

• Select the desired Temp. to lower Number.

• Wait 3 Minutes.

Is the Unit for 3 minutes

delay?

• 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

Service Manual 37

Troubleshooting Guide

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 4

of IC01M DC 5V?

Is the voltage NO.16 or 15 or 13

of IC01M 0V?

• Check the RY-Hi or
RY-Med or RY-Lo.

•

Check the wiring diagram.

NO

NO

YES

YES

Is the voltage of Battery

over 2.3V?

• Replace Receiver Ass'y.

Is the connection of

CN-AC/DC OK?

Is the voltage No.10

of CN-AC/DC on AC PCB

Ass'y DC 5V?

• Replace the battery.

• Check the PCB pattern.

• Connect connector to

CN-AC/DC exactly.

NO

NO

NO

YES

YES

YES

38 Room Air Conditioner

Troubleshooting Guide

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

NO

NO

NO

NO

YES

YES

YES

Are the IC01G and IC02G

good?

Is the connection of

CN-AC/DC OK?

• Replace the DC
PCB Ass'y.

• Replace IC01G,
IC02G.

• Replace IC03G.

• Connect connector

to CN-AC/DC exactly.

Does IC03G

operate normally on AC

PCB Ass'y?

Service Manual 39

Troubleshooting Guide

COMPLAINT CAUSE REMEDY

Check voltage at outlet. Correct if none.
Check voltage to Control Box. If none, check power

supply cord. Replace cord if circuit is open.
Connect wire. Refer to wiring diagram for terminal

identification. 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 hitting
scroll. Realign assembly.

Units using slinger ring for condenser fan must have

1

/4to 5/16inch clearance to the base. If it hits the
base, 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.

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 to
low speed. If the speed does not change, replace the
motor.

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 noise
appears to be internal while running, replace motor.

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

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

No power
Power supply cord

Wire disconnected or con­nection loose

Capacitor (Discharge
capacitor 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.

40 Room Air Conditioner

Troubleshooting Guide

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 the
thermistor 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. If
open or grounded, replace the compressor.

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

If not running, determine the cause. Replace if
required.

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

If condenser fins are closed over a large area on the
coil surface, head pressures will increase, causing
the compressor to overload. Straighten the fins or
replace 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 to

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

Thermistor

Capacitor (Discharge
capacitor before servicing.)

Compressor

Overload

Voltage

Overload

Fan motor

Condenser air flow restric­tion

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 on
overload.

Compressor cycles on
overload.

Compressor cycles on
overload.

Insufficient cooling or heat­ing

Excessive noise

Service Manual 41

Exploded View

Exploded View

D
E

F
R

O
S

T

H

E
A

T

C

O
O

L

I
N
D

O

O
R

D

E
S

I
R
E

D

E

N
E
R

G
Y

S

A
V

E

R
A
I

R

P
U

R
Y

F

I

E

R

A
U

T

O

R
E

S
T

A

R

T

F

A
N

FAN

D

R

Y

130910

149980

346811

359012

W48602

349480

349001

268714

268712

238310

W0CZZ 135500

249950

147581

147582-1

559010

352111

352113

W52106-1

263230

237200

W48602

148000

349600

354210

152312

267110

152302

264110

130410

550140

35211A

554160

567502

135312

135303

554031

T
IM

E
R

M

O
D

E

T
E

M

P

PO

W

ER

F

A
N

S

P

EE

D

147582-2

W52106-2

˚C

TIMER

POWER

MODE

T

E

M

P

F

A

N

S

P

E

E

D

F

1
L

O
W

F

2
M

E
D

F

3
H

I
G
H

D

r

y

T

i

m

e

r

F

a

n

E

n

e

rg

y

S

av

e

r

C

o

o

l

352390-2 352390-1

■ COOLING MODEL

Exploded View

42 Room Air Conditioner

■ HEATING MODEL

D

E
F

R
O

S

T

HEAT

COOL

I

N
D

O
O

R

D
E

S
I
R

E
D

E

N

E
R

G
Y

S
A

V
E

R

A

I
R

P
U

R

Y
F

I
E
R

A

U
T

O

R

E
S

T
A

R
T

FAN

F

A
N

DRY

130910

149980

346811

359012

W48602

349480

349001

268714

268712

238310

W0CZZ 135500

249950

147581

147582-1

559010

552111

352115-1

263230

237200

W48602

148000

349600

354210

152312

152302

264110

130410

550140

554160

567502

135312

135303

554031

TIMER

MODE

TEMP

P
O

W

E
R

FAN
S
P

E

E
D

147582-2

352115-2

352390-2

35211A

566000

552202

352113

267110

352390-1

Service Manual 43

Replacement Parts List

Replacement Parts List

DESCRIPTION

130410 BASE ASSEMBLY,WELD[SINGLE] 3041A20023D
130910 CABINET ASSEMBLY,SINGLE 3091AR6057E
135303 GRILLE,INLET 3530A10080A
135312 GRILLE ASSEMBLY,FRONT(SINGLE) 3531A20095A

147581 LOUVER,HORIZONTAL 4758A30022A
147582-1 LOUVER,VERTICAL 4758A20042A
147582-2 LOUVER,VERTICAL 4758A20042B

148000 BRACE 4800A20001A

149980 SHROUD 4998A10013A

152302 FILTER ASSEMBLY,AIR CLEANER 5231A20008A

159830 AIR CLEANER ASSEMBLY 5983A10009K

237200 PANEL,CONTROL 3720A10110A

238310 ESCUTCHEON 3831A10020F

249950 CONTROL BOX ASSEMBLY,SINGLE 4995A30010K

263230 THERMISTOR ASSEMBLY 6323A20004E

264110 POWER CORD ASSEMBLY 6411A20011K

267110 REMOTE CONTROLLER ASSEMBLY 6711A20052A

268712 PWB(PCB) ASSEMBLY,MAIN(DC) 6871A20323A

268714 PWB(PCB) ASSEMBLY,MAIN(AC) 6871A20271B

349001 DAMPER,VENTILATION 4900A20004A

349480 ORIFICE 4948A30008A

349600 MOUNT,MOTOR 4960AR2895B

352113 TUBE ASSEMBLY,DISCHARGE SINGLE 5211A30066N

35211A TUBE ASSEMBLY,SUCTION(OUTDOOR) 5211A20441A
352390-1 AIR GUIDE ASSEMBLY 5239A20002A
352390-2 AIR GUIDE ASSEMBLY 5239A20003A

354210 EVAPORATOR ASSEMBLY,FIRST 5421A20091A
359012 FAN ASSEMBLY,TURBO 5901A20009A
550140 ISOLATOR,COMP 4H00982C
552111 TUBE ASSEMBLY,CAPILLARY 5211A30275R
554031 CONDENSER ASSEMBLY,BENT 5403A20062B
559010 FAN ASSEMBLY,AXIAL 5901A20010A
567502 O.L.P 6750U-L016A

W0CZZ CAPACITOR,DRAWING 6120AR2194F

W48602 CLAMP,SPRING 3H02932C
W52106-1 TUBE,FORMED 5210A21099E
W52106-2 TUBE,FORMED 5210A21099F

554160 COMPRESSOR SET 2520UMKK2AA
346811 MOTOR ASSEMBLY,SINGLE 4681A20011M

PART NO.

REMARK

LW1800PRZ3

LOCATION

NO

.

44 Room Air Conditioner

Replacement Parts List

130410 BASE ASSEMBLY, WELD[SINGLE] 3041A20023B 3041A20023B 3041A20023Z R
130910 CABINET ASSEMBLY, SINGLE 3091AR6057H 3091AR6057H 3091AR6057H R
135303 GRILLE, INLET 3530A10080A 3530A10080A 3530A10080A R
135312 GRILLE ASSEMBLY, FRONT(SINGLE) 3531A20095A 3531A20095D 3531A20095D R
135500 COVER 3550A30122A 3550A20217A 3550A20217A R
146812 MOTOR ASSEMBLY,SYNC. - 2H01102A 2H01102A R

147581 LOUVER, HORIZONTAL 4758A30022A 4758A30022A 4758A30022A R
147582-1 LOUVER, VERTICAL 4758A30023A 5210A21099L - R
147582-2 LOUVER, VERTICAL 4758A30023B 5210A21099M - R

148000 BRACE 4800A20001A 4800A20001A 4800A20001A R

149980 SHROUD 4998A10013A 4998A10013A 4998A10013A R

152302 FILTER ASSEMBLY, AIR CLEANER 5231A20008A 5231A20008A 5231A20008A R

152312 PLASMA FILTER ASS'Y - - 3720A10112A R

237200 PANEL, CONTROL 3720A20156A 3720A10112A 3831A10021P R

238310 ESCUTCHEON 3831A10023B 3831A10021P R

249950 CONTROL BOX ASSEMBLY, SINGLE 4995A20194U 4995A20330B 4995A20330A R

263230 THERMISTOR ASSEMBLY 6323A20004E 6323A20004E 6323A20004E R

264110 POWER CORD ASSEMBLY 3H01307F 3H01307G 3H01307H R

268712 PWB(PCB) ASSEMBLY, MAIN(DC) 6871A20187C 6871A20325C 6871A20325C R

268714 PWB(PCB) ASSEMBLY, MAIN(AC) 6871A20167G 6871A20271C 6871A20271C R

346811 MOTOR ASSEMBLY, SINGLE 4681AR6033V 4681AR6033V 4681A20081G R

349001 DAMPER, VENTILATION 4900A20004A 4900A20004A 4900A20004A R

349480 ORIFICE 4948A30008A 4948A30008A 4948A30008A R

349600 MOUNT, MOTOR 4960AR1596A 4960AR1596A 4960AR1596A R

352111 TUBE ASSEMBLY,CAPILLARY - 5211A30275J 5211A30275V

352113 TUBE ASSEMBLY, DISCHARGE SINGLE 5211A30066T 5211A30066T 5211A20805J R
352115-1 TUBE FORMED, EVAPORATOR 5210A21099L - 5210A21099X R
352115-2 TUBE FORMED, EVAPORATOR 5210A21099M - 5210A21099W R

35211A TUBE ASSEMBLY, SUCTION(OUTDOOR) 5211A20441D 5211A20441D 5211A20441H R
352390-1 AIR GUIDE ASSEMBLY 5239A20002B 5239A20002B 5239A20002B R
352390-2 AIR GUIDE ASSEMBLY 5239A20003B 5239A20003C 5239A20003C R

354210 EVAPORATOR ASSEMBLY, FIRST 5421A20091D 5421A20091E 5421A20091C R

359012 FAN ASSEMBLY, TURBO 5901A20009A 5901A20009A 5901A20009A R

550140 ISOLATOR, COMP 4H00982C 4H00982C - R

552101 TUBE,CAPILLARY - 5210A20556N - R

552111 TUBE ASSEMBLY, FORMED COND 5211AR3399R - - R

554031 CONDENSER ASS'Y 5403A20004J 5403A20004K 5403A20062H R

554160 COMPRESSOR SET 2520UMDK2DA 2520UMDK2DA 2520UHCK2AA R

559010 FAN ASSEMBLY, AXIAL 5901A20010A 5901A20010A 5900AR1508A R

567502 OVERLOAD PROTECTOR - - - R

W0CZZ CAPACITOR, DRAWING 6120AR2194P 6120AR2194P 2A00986Y R

W48602 CLAMP, SPRING 3H02932C 3H02932C 3H02932C R

267110 REMOTE CONTROLLER ASSEMBLY 6711A20034Z 6711A20034F 6711A20034F R

DESCRIPTION

PART NO.

REMARK

LWP1820PDL LWC182PLMM0 LWC212PLMM0

LOCATION

NO

.

Service Manual 45

Replacement Parts List

DESCRIPTION

130410 BASE ASSEMBLY, WELD[SINGLE] 3041A20023B 3041A20023C R

130910 CABINET ASSEMBLY, SINGLE 3091AR6057E 3091AR6057E R

135303 GRILLE, INLET 3530A10080A 3530A10080A R

135312 GRILLE ASSEMBLY, FRONT(SINGLE) 3531A20095A 3531A20095A R

135500 COVER, CONTROL BOX 3550A30122A 3550A30122A R

146812 MOTOR ASSEMBLY,SYNC. - - R

147581 LOUVER, HORIZONTAL 4758A30022A 4758A30022A R

147582-1 LOUVER, VERTICAL 4758A20042B 4758A20042B R
147582-2 LOUVER, VERTICAL 4758A20042A 4758A20042A R

148000 BRACE 4800A20001A 4800A20001A R

149980 SHROUD 4998A10013A 4998A10013A R

152302 FILTER ASSEMBLY,AIR CLEANER - - R

152312 FILTER ASSEMBLY, AIR CLEANER 5231A20008A 5231A20008A R

237200 PANEL, CONTROL 5983A10009K - R

238310 ESCUTCHEON 6871A20271A 6871A20167D R

249950 CONTROL BOX ASSEMBLY, SINGLE 3720A10110A 3720A10112A R

263230 THERMISTOR ASSEMBLY 6871A20323A 6871A20325A R

263230 THERMISTOR ASSEMBLY 6323A20004E 6323A20004E R

264110 POWER CORD ASSEMBLY 6411A20011J 6411A20011K R

267110 REMOTE CONTROLLER ASSEMBLY 6711A20052A 6711A20034G R

268712 PWB(PCB) ASSEMBLY, MAIN(DC) 4995A30010D 4995A20278L R

268714 PWB(PCB) ASSEMBLY, MAIN(AC) 3831A10020F 3831A10021M R

346811 MOTOR ASSEMBLY, SINGLE 4681AR6033X 4681A20011M R

349001 DAMPER, VENTILATION 4900A20004A 4900A20004A R

349480 ORIFICE 4948A30008A 4948A30008A R

349600 MOUNT, MOTOR 4960AR1596A 4960AR2895B R

35211A

TUBE ASSEMBLY,SUCTION(OUTDOOR)

5211A20441C 5211A20441A R
352111 TUBE, CAPILLARY 5211AR3399L - R
352113 TUBE ASSEMBLY,DISCHARGE SINGLE - - R

352115-1 TUBE FORMED, EVAPORATOR 5211A20215G - R
352115-2 TUBE FORMED, EVAPORATOR 5211A20215H - R

35211A TUBE ASSEMBLY,SUCTION(OUTDOOR) R
352390-1 AIR GUIDE ASSEMBLY 5239A20002A 5239A20002A R
352390-2 AIR GUIDE ASSEMBLY 5239A20003A 5239A20003A R

354210 EVAPORATOR ASSEMBLY, FIRST 5421A20091A 5421A20091A R
359012 FAN ASSEMBLY, TURBO 5901A20009A 5901A20009A R
550140 ISOLATOR, COMP 4H00982C 4H00982C R
552101 TUBE,CAPILLARY - - R
552111 TUBE ASSEMBLY,CAPILLARY - 5211A30275R R
552113 TUBE ASSY, CONDENSER OUT 5211A30066R 5211A30066N R
552116 TUBE ASSEMBLY, REVERSING - - R
552202 VALVE, REVERSING - - R
554031 CONDENSER ASSEMBLY, BENT 5403A20062B 5403A20062B R
554160 COMPRESSOR SET 2520UMTC2AA 2520UMKK2AA R
559010 FAN ASSEMBLY,AXIAL 5901A20010A 5901A20010A R
561410 COIL ASSEMBLY, REVERSING VALVE - - R
566000 SWITCH, PRESSURE - - R
567502 O.L.P - 6750U-L016A R

W0CZZ CAPACITOR, DRAWING 0CZZA20001L 6120AR2194F R

W48602 CLAMP, SPRING 3H02932C 3H02932C R

267110 REMOTE CONTROLLER ASSEMBLY - - R

3041A20023D
3091AR6057E
3530A10080A
3531A20095A
3550A20089A

­4758A30022A
4758A20042A
4758A20042B
4800A20001A
4998A10013A
5231A20008A

-

-

­4995A30010M
6323A20004E

6411A20011K

6871A20323C

6871A20167L
4681A20011M
4900A20004A
4948A30008A
4960AR2895B

-

­5211A30066N
5210A21099A
5210A21099B
5211A20441A
5239A20002A
5239A20003A
5421A20091A
5901A20009A

4H00982C
5210A20492R
5211A30275R

-

-

-

5403A20062B

2520UMKK2AA

5901A20010A

-

-

6750U-L016A

6120AR2194F

3H02932C
6711A20034G

PART NO.

REMARK

LW1500PRY3 LW1800ERZ3 LW1804ER

LOCATION

NO

.

46 Room Air Conditioner

DESCRIPTION

130410 BASE PAN WELD ASS'Y 3041A20023B R
130910 CABINET ASS'Y 3091AR6057E 3091AR6057H R
135312 FRONT GRILL ASS'Y 3531A20095A 3531A20095B R
135303 INLET GRILLE 3530A10080A R
135500 COVER, CONTROL BOX 3550A30122A R

147581 HORIZONTAL LOUVER 4758A30022A R
147582-1 VERTICAL LOUVER 4758A30023A R
147582-2 VERTICAL LOUVER 4758A30023B R

148000 BRACE 4800A20001A R

149980 SHROUD 4998A10013A R

152302 AIR FILTER ASS'Y 5231A20008A R

152312 PLASMA FILTER ASS'Y 5983A10009H - 5983A10009H R

237200 CONTROL PANEL 3720A20141A 3720A20156A 3720A20141A R

249950 CONTROL BOX ASS'Y 4995A20194C 4995A20194J 4995A20194M 4995A20194R R

268712 DISPLAY PCB ASS'Y 6871A20185A 6871A20187A 6871A20185A 6871A20185C R

238310 ESCUTCHEON 3831A10020B 3831A10023A 3831A10020B R

268714 MAIN PCB ASS'Y 6871A20167B 6871A20167D 6871A20167E 6871A20167B R

263230 THERMISTOR ASS'Y 6323A20004E R

264110 POWER CORD ASS'Y 6411A20011K 6411A20011J 6411A20011K R

346811 MOTOR ASS'Y 4681AR6033V 4681AR6033X 4681AR6033V R

349001 VENTILATION DAMPER 4900A20004A R

349480 ORIFICE 4948A30008A R

349600 MOUNT MOTOR 4960AR1596A R

352111 TUBE ASS'Y CAPILLARY 5211AR3332Z 5211A30275F 5211AR3399L R

352113 DISCHARGE TUBE 5211A30066N 5211A30066R 5211A30066N R

W52106-1 TUBE FORMED, EVAPORATOR 5210A21099A 5210A21099E R
W52106-2 TUBE FORMED, EVAPORATOR 5210A21099B 5210A21099F R

35211A SUCTION TUBE ASS'Y 5211A20441A 5211A20441C 5211A20441A R
352390-1 AIR GUIDE ASSEMBLY 5239A20002A R
352390-2 AIR GUIDE ASSEMBLY 5239A20003A R

354210 EVAPORATOR ASS'Y 5421A20091A 5421A20091C R

567502 OVERLOAD PROTECTOR 6750U-L025A INTERNAL 6750U-L025A R

550140 ANTI-VIBRATION BUSH 4H00982C R

554031 CONDENSER ASS'Y 5403A20062B 5403A20062C R

554160 COMPRESSOR 2520UMBK2EA 2520UMTC2AA 2520UMBK2EA R

559010 FAN 5901A20010A R

359012 TURBO FAN 5901A20009A R

W48602 CLAMP, SPRING 3H02932C R

W0CZZ CAPACITOR 6120AR2194D 0CZZA20001L 6120AR2194D R

267110 REMOTE CONTROLLER 6711A20052A 6711A20034G 6711A20052A 6711A20052D R

PART NO.

REMARK

LW1800PR LW1800ER LW1500PR LWP1830WAL

LOCATION

NO

.

Replacement Parts List

Service Manual 47

DESCRIPTION

130410 BASE ASSEMBLY, WELD[SINGLE] 3041A20023B R
130910 CABINET ASSEMBLY, SINGLE 3091AR6057H R
135303 GRILLE, INLET 3530A10080A R
135312 GRILLE ASSEMBLY, FRONT(SINGLE) 3531A20095A R
135500 COVER, CONTROL BOX 3550A30122A R

147581 LOUVER, HORIZONTAL 4758A30022A R
147582-1 LOUVER, VERTICAL 4758A30023A R
147582-2 LOUVER, VERTICAL 4758A30023B R

148000 BRACE 4800A20001A R

149980 SHROUD 4998A10013A R

152312 FILTER ASSEMBLY, AIR CLEANER 5231A20008A R

237200 PANEL, CONTROL 3720A20156A R

238310 ESCUTCHEON 3831A10023C R

249950 CONTROL BOX ASSEMBLY, SINGLE 4995A20194T R

263230 THERMISTOR ASSEMBLY 6323A20003P R

263230 THERMISTOR ASSEMBLY 6323A20004E R

264110 POWER CORD ASSEMBLY 3H01307F R

267110 REMOTE CONTROLLER ASSEMBLY 6711A20034Z R

268712 PWB(PCB) ASSEMBLY, MAIN(DC) 6871A20187B R

268714 PWB(PCB) ASSEMBLY, MAIN(AC) 6871A20167F R

346811 MOTOR ASSEMBLY, SINGLE 4681AR6033Y R

349001 DAMPER, VENTILATION 4900A20004A R

349480 ORIFICE 4948A30008A R

349600 MOUNT, MOTOR 4960AR1596A R

35211A

TUBE ASSEMBLY,SUCTION(OUTDOOR)

-R

352111 TUBE, CAPILLARY 5425AR3147H R
352115-1 TUBE FORMED, EVAPORATOR 5210A21099N R
352115-2 TUBE FORMED, EVAPORATOR 5210A21099P R
352390-1 AIR GUIDE ASSEMBLY 5239A20002C R
352390-2 AIR GUIDE ASSEMBLY 5239A20003B R

354210 EVAPORATOR ASSEMBLY, FIRST 5421A20091D R

359012 FAN ASSEMBLY, TURBO 5901A20009A R

550140 ISOLATOR, COMP 4H00982C R

552111 TUBE ASSEMBLY,CAPILLARY R

552113 TUBE ASSY, CONDENSER OUT 5211A30156B R

552116 TUBE ASSEMBLY, REVERSING 5211A30157G R

552202 VALVE, REVERSING 3A02027G R

554031 CONDENSER ASSEMBLY, BENT 5403A20013R R

554160 COMPRESSOR SET 2520UMDK2DA R

559010 FAN ASSY, AXIAL 5900AR1330A R

561410 COIL ASSEMBLY, REVERSING VALVE 3A02028K R

566000 SWITCH, PRESSURE 6600AG3057B R

567502 O.L.P - R

W0CZZ CAPACITOR, DRAWING 6120AR2194P R

W48602 CLAMP, SPRING 3H02932C R

PART NO.

REMARK

LWP1820PEL

LOCATION

NO

.

Replacement Parts List

48 Room Air Conditioner

DESCRIPTION

130410 BASE ASSEMBLY,WELD[SINGLE] 3041A20023D 3041A20023D

130910 CABINET ASSEMBLY,SINGLE 3091AR6057E 3091AR6057E

135303 GRILLE,INLET 3530A10080A 3530A10080A

135312 GRILLE ASSEMBLY,FRONT(SINGLE) 3531A20095A 3531A20095A

135500 COVER 3550A20089A 3550A30122A

146812 MOTOR ASSEMBLY,SYNC. - -

147581 LOUVER,HORIZONTAL 4758A30022A 4758A30022A

147582-1 LOUVER,VERTICAL 4758A20042A 4758A20042A
147582-2 LOUVER,VERTICAL 4758A20042B 4758A20042B

148000 BRACE 4800A20001A 4800A20001A

149980 SHROUD 4998A10013A 4998A10013A

152302 FILTER ASSEMBLY,AIR CLEANER 5231A20008A 5231A20008A

152312 PLASMA FILTER ASS'Y - -

237200 PANEL,CONTROL - 3720A10110A

238310 ESCUTCHEON - 3831A10020M

249950 CONTROL BOX ASSEMBLY,SINGLE 4995A30010M 4995A30010M

263230 THERMISTOR ASSEMBLY 6323A20004E 6323A20004E

264110 POWER CORD ASSEMBLY 6411A20011K 6411A20011K

267110 REMOTE CONTROLLER ASSEMBLY 6711A20034G 6711A20034G

268712 PWB(PCB) ASSEMBLY,MAIN(DC) 6871A20323C 6871A20323C

268714 PWB(PCB) ASSEMBLY,MAIN(AC) 6871A20167L 6871A20167L

346811 MOTOR ASSEMBLY,SINGLE 4681A20011M 4681A20011M

349001 DAMPER,VENTILATION 4900A20004A 4900A20004A

349480 ORIFICE 4948A30008A 4948A30008A

349600 MOUNT,MOTOR 4960AR2895B 4960AR2895B

352113 TUBE ASSEMBLY,DISCHARGE SINGLE 5211A30066N 5211A30066N

352115-1 TUBE,EVAPORATOR 5210A21099A 5210A21099A
352115-2 TUBE,EVAPORATOR 5210A21099B 5210A21099B

35211A TUBE ASSEMBLY,SUCTION(OUTDOOR) 5211A20441A 5211A20441A

352390-1 AIR GUIDE ASSEMBLY 5239A20002A 5239A20002A
352390-2 AIR GUIDE ASSEMBLY 5239A20003A 5239A20003A

354210 EVAPORATOR ASSEMBLY,FIRST 5421A20091A 5421A20091A

359012 FAN ASSEMBLY,TURBO 5901A20009A 5901A20009A

550140 ISOLATOR,COMP 4H00982C 4H00982C

552101 TUBE,CAPILLARY 5210A20492R 5210A20492R

552111 TUBE ASSEMBLY,CAPILLARY 5211A30275R 5211A30275R

554031 CONDENSER ASSEMBLY,BENT 5403A20062B 5403A20062B

554160 COMPRESSOR SET 2520UMKK2AA 2520UMKK2AA

559010 FAN ASSEMBLY,AXIAL 5901A20010A 5901A20010A

567502 O.L.P 6750U-L016A 6750U-L016A

W0CZZ CAPACITOR,DRAWING 6120AR2194F 6120AR2194F

W48602 CLAMP,SPRING 3H02932C 3H02932C

PART NO.

REMARK

LW1804ER LWC183PLMDI

LOCATION

NO

.

Service Manual 49

DESCRIPTION

130410 BASE ASSEMBLY,WELD[SINGLE] 3041A20023D

130910 CABINET ASSEMBLY,SINGLE 3091AR6057E

135303 GRILLE,INLET 3530A10146A

135312 GRILLE ASSEMBLY,FRONT(SINGLE) 3531A10201A

135500 COVER 3550A30122A

147581 LOUVER,HORIZONTAL 4758A30022A
147582-1 LOUVER,VERTICAL 4758A20042A
147582-2 LOUVER,VERTICAL 4758A20042B

148000 BRACE 4800A20001A

149980 SHROUD 4998A10013A

152302 FILTER ASSEMBLY,AIR CLEANER 5231A20008A

237200 PANEL,CONTROL 3720A10112A

238310 ESCUTCHEON 3831A10021F

249950 CONTROL BOX ASSEMBLY,SINGLE 4995A20194Y

263230 THERMISTOR ASSEMBLY 6323A20004E

264110 POWER CORD ASSEMBLY 6411A20011K

267110 REMOTE CONTROLLER ASSEMBLY 6711A90019C

268712 PWB(PCB) ASSEMBLY,MAIN(AC) 6871A20167D

268714 PWB(PCB) ASSEMBLY,MAIN(DC) 6871A20325A

346811 MOTOR ASSEMBLY,SINGLE 4681A20011M

349001 DAMPER,VENTILATION 4900A20004A

349480 ORIFICE 4948A30008A

349600 MOUNT,MOTOR 4960AR2895B

352111 TUBE,CAPILLARY BEND 5210A20492R

352113 TUBE ASSEMBLY,DISCHARGE SINGLE 5211A30066N
352390-1 AIR GUIDE ASSEMBLY 5239A20002A
352390-2 AIR GUIDE ASSEMBLY 5239A20003A

354210 EVAPORATOR ASSEMBLY,FIRST 5421A20091C

359012 FAN ASSEMBLY,TURBO 5901A20009A

550140 ISOLATOR,COMP 4H00982C

554031 CONDENSER ASSEMBLY,BENT 5403A20062B

554160 COMPRESSOR SET 2520UMKK2AA

559010 FAN ASSEMBLY,AXIAL 5901A20010A

35211A TUBE ASSEMBLY,SUCTION(OUTDOOR) 5211A20441A
W0CZZ CAPACITOR,DRAWING 6120AR2194F

W48602 CLAMP,SPRING 3H02932C
W52106-1 TUBE,FORMED 5210A21099E
W52106-2 TUBE,FORMED 5210A21099F

PART NO.

REMARK

HBLG183R

LOCATION

NO

.

P/No.: 3828A20140E

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