Goldstar Lwm1836b5s Owner's Manual

Room Air Conditioner

SERVICE MANUAL

MODELS: R1804H/M2400HR/HBLG1800H/LWM1836B5S

website http://www.lgservice.com

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

- ONLY FOR AUTHORIZED SERVICE.

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CAUTION

2 Room Air Conditioner

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

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

Installation.......................................................................................................................................................6

How to Install the Unit ................................................................................................................................6

How to use the Reversible Inlet grille.........................................................................................................6

Window Requirements...............................................................................................................................7

Installation Kits Contents (some models including installation kit).............................................................7

Suggested tool Requirements....................................................................................................................8

Cabinet Installation.....................................................................................................................................9

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

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

Control Locations Function of Controls....................................................................................................11

Disassembly instructions.............................................................................................................................13

Mechanical parts......................................................................................................................................13

Air Handling Parts ....................................................................................................................................14

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

Refrigeration cycle ...................................................................................................................................18

Troubleshooting guide..................................................................................................................................21

Piping System ..........................................................................................................................................21

Troubleshooting guide..............................................................................................................................22

Schematic Diagram.......................................................................................................................................27

Electronic Control Device.........................................................................................................................27

Components location (Main P.W.B Assembly)..........................................................................................28

Wiring Diagram.........................................................................................................................................29

Product Specifications.................................................................................................................................31

Exploded View...............................................................................................................................................32

Replacement Parts List ................................................................................................................................33

Air Conditioner Service Manual

TABLE OF CONTENTS

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 property only.

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.

Be sure not to do.

Be sure to follow the instruction.

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.

• 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.

Gasolin

Sharp edges

Dimensions

Dimensions

675(770)

660

428

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

Service Manual 5

6 Room Air Conditioner

INSTALLATION

How to Install the unit

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 cir-

cuit. 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 grille is designed to clean the filter both upward and downward.

A. BEFORE ATTACHING THE FRONT GRILLE TO THE CAB-

INET, IF YOU WANT TO PULL OUT THE FILTER
UPWARD;

1. Open the inlet grille slightly (a).

2. Turn inside out the front grille (a).

3. Disassemble the inlet grille from the front grille with separating the

hinged part by inserting a straight type screw-driver tip (b).

4. Then, rotate the inlet grille 180 degrees and insert the hooks into

bottom holes of the front grille.

5. Insert the filter and attach the front grille to the cabinet.

B. IF YOU WANT TO PULL OUT THE FILTER DOWNWARD;

THE GRILLE IS ALREADY DESIGNED FOR THAT WAY.

About 1/2"

Over 20"

HEAT

RADIATION

FENCE

AWNING

FOAM

COOLED

AIR

30-60"

Level

1/4 Bubble

(b)

b

(a)

(c)

How to use the Reversible Inlet grille

Installation

Service Manual 7

Installation

Window Requirements

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

NOTICE

• WINDOW REQUIREMENTS

1. This unit is designed for installation in standard double hung windows with actual opening widths from 29" to 41".

The top and bottom window sashes must open sufficiently to allow a clear vertical opening of 18" from the bot­tom of the upper sash to the window stool.

2. The stool offset (height between the stool and sill) must be less than 1 1/4".

Installation Kits Contents (some models including installation kit)

Foam-PE
(Adhesive-Backed)

Foam-PE

(Adhesive-Backed)

Type C (5) Type D (2)

Type A (14)

Carriage Bolt (2) Lock Nut (4)

Top retainer bar

Type B (7)

Foam strip

(Plain-Back)

Right frame
curtain

Window locking
bracket

Left frame
curtain

Frame guide(2)

Sill

bracket

(2)

Support bracket(2)

8 Room Air Conditioner

Installation

Suggested tool Requirements

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

• 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-PE 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.

Foam-PE

Top retainer bar

Top retainer bar

Foam-PE

Screw

(Type A)

Screw(Type A)

Frame guide

Shipping screws

Thermostat

Operation

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Figure 1

Figure 2

Figure 3

Figure 4

Service Manual 9

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)

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

Front angle

Window stool

Top
retainer
bar

Window sash

Top retainer bar

Cabinet

Foam-PE

Frame curtain

Foam-PE

Screw(Type B)

Front Angle

Sash track

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

10 Room Air Conditioner

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)

CAUTION: For security purpose, rein­stall screws (Type A) at cabinet's

sides.

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.34)

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)

Thermost

at

Operati

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Thermostat

Operation

Wait Three Minutes
Before Restarting

CoolerWarmer

Off

Auto Swing

Off On

Fan Fan

Low Heat Low Cool

High CoolHigh Heat

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

Service Manual 11

Operation

Operation

• Powerful and quiet cooling.

• Slide-in and slide-out chassis for the simple installation and service.

• Reversible inlet grille.

• Side air-intake, side cooled-air discharge.

• Built in adjustable THERMOSTAT/THERMISTOR.

• Washable one-touch filter.

• Compact size.

CAUTION: When the air conditioner has been performing its cooling operation
and is turned off or set to the fan position, wait at least 3 minutes before resetting
to the cooling operation again.

Features

Control Locations Function of Controls

• THERMOSTAT

Turn the thermostat control to the desired setting.
The centrol position is a normal setting for average con-

ditions. You can change this setting, if necessary, in
accordance with your temperature preference.

The thermostat automatically controls cooling or heat­ing, but the fan runs continuously whenever the air con­ditioner is in operation. If the room is too warm, turn the
thermostat control clockwise. If the room is too cool, turn
the themostat control anticlockwise.

• OPERATION

OFF ( ) :Turns the air conditioner off.
FAN ( ) : Permits the low fan speed operation

without cooling (heating).
LOW COOL ( ) : Permits cooling with the low fan

speed operation.
HIGH COOL ( ) : Permits cooling with the high fan

speed operation.
LOW HEAT ( ) : Permits heating with the low fan

speed operation.
HIGH HEAT ( ) : Permits heating with the high fan

speed operation.

• AUTO SWING

ON : Starts the operation of air swing.
OFF : Stops the operation of air swing.

• Before you turn the unit off, please press the Auto
Swing switch to off.

Thermostat

Operation

Wait Three Minutes

Before Restarting

CoolerWarmer

Off

Auto Swing

Off On

Fan Fan

Low Heat Low Cool

High CoolHigh Heat

Part A

Part B

VENTCLOSE OPEN

A slight heat odor may come from the unit
when first switching to HEAT after the cool­ing season is over. This odor, caused by fine
dust particles on the heater, will disappear
quickly.

• VENTILATION

The ventilation lever must be in the CLOSE position in order
to maintain the best cooling conditions.

When a fresh air is necessary in the room, set the ventilation
lever to the OPEN position.

The damper is opened and room air is exhausted.

NOTE: Before using the ventilation feature,
make the lever, as shown. First, pull down
part A to horizontal line with part B .

NOTICE

o