LG LWHD2500ER, LW240CE, HBLG2504E, LW250CE Service Manual

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Room

Air Conditioner

SERVICE MANUAL

MODELS: HBLG2504E

LW250CE, LW240CE LWHD2500ER

CAUTION

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

• ONLY FOR AUTHORIZED SERVICE PERSONNEL.

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

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

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

Function of Controls .................................................................................................................................11

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

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

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

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

Refrigerating Cycle...................................................................................................................................16

Schematic Diagram.......................................................................................................................................19

Electronic Control Device.........................................................................................................................19

Wiring Diagram.........................................................................................................................................20

Components Location ..............................................................................................................................21

Troubleshooting Guide.................................................................................................................................22

Piping System ..........................................................................................................................................22

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

Electrical Parts Troubleshooting Guide ....................................................................................................25

Electric Parts ............................................................................................................................................29

Exploded View ..............................................................................................................................................35

Replacement Parts List ................................................................................................................................36

2 Room Air Conditioner

Safety Precautions

WARNING

CAUTION

WARNING

Safety Precautions

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

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

This symbol indicates the possibility of death or serious injury.

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

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

Be sure not to do.

Be sure to follow the instruction.

■ Installation

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

• There is risk of fire or electric shock.

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

• There is risk of electric shock.

Service Manual 3

Safety Precautions

Sharp edges

Gasolin

Do not modify or extend the power cord.

• There is risk or fire or electric shock.

Be cautious when unpacking and installing the product.

• Sharp edges could cause injury. Be especially careful

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

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

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

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

• There is risk of fire or failure of product.

Be sure the installation area does not deteriorate with age.

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

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

4 Room Air Conditioner

Dimensions

TIMER POWERMODE

TEMP

FAN

SPEED

F1 LOW F2 MED F3 HIGH

Dry Timer

Fan

Energy Saver

Cool

NOTICE

Symbols Used in this Manual

This symbol alerts you to the risk of electric shock.

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

This symbol indicates special notes.

Outside Dimensions

Dimensions

Model

HBLG2504E, LW250CE, LW240CE, LWHD2500ER

Dimension

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

H mm(inch) 449(17

D mm(inch) 721(28

/16)

/32)

Service Manual 5

Specfications

Product Specifications

MODELS

ITEMS

POWER SUPPLY

COOLINGCAPACITY (BTU/h)

INPUT (W)

RUNNING CURRENT (A)

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

OPERATING

CONDITION

REFRIGERANT (R-22) CHARGE

EVAPORATOR

CONDENSER

FAN, INDOOR

FAN, OUTDOOR

FAN SPEEDS, FAN/COOLING/HEATING

FAN MOTOR

OPERATION CONTROL

INDOOR (°C)

OUTDOOR (°C)

HBLG2504E, LW250CE,

LWHD2500ER

208/230V, 60Hz

24,500/25,000 23,150/23,600

2,600/2,660 2,450/2,500

13.0/12.0 13.2/12.2

9.4

26.7(DB)* 19.4(WB)**

35(DB)* 23.9(WB)**

1,080g(38.1 oz) 980g(34.6 oz)

3 ROW 12 STACKS

3 ROW 20 STACKS

TURBO FAN

PROPELLER TYPE FAN WITH SLINGER RING

3/3

6 POLES

REMOTE CONTROLLER

LW240CE

ROOM TEMP. CONTROL

AIR DIRECTION CONTROL

CONSTRUCTION

COMPRESSOR

PROTECTOR

FAN MOTOR

POWER CORD

DRAIN SYSTEM

NET WEIGHT (lbs/kg)

OUTSIDE DIMENSION (inch)

(W x H x D) (mm)

* DB : dry bulb

** WB : wet bulb

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

128/58

25 31/32 x 1711/16 x 28 13/32

660 x 449 x 721

6 Room Air Conditioner

Installation

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 PA N

DRAIN HOSE

Fig. 1

CABINET

SCREW

Select the Best Location

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.

Installation

Figure 1

Installation Check

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.

How to Secure the Drain Pipe

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

2. Connect the drain hose to the outlet located at the bottom of the drain

3. Select the most appropriate connection from among the following figures

the plug with 4 (or 2) screws.

pan. You can purchase the drain hose or tubing locally to satisfy your particular needs. (Drain hose is not supplied).

(by considering the hole of the unit) to fit drain pan to your own unit.

Service Manual 7

Installation

29" to 41"

19" min.

Inner sill

Offset

Window

Sash

Sill

Exterior

Interior wall

26" min.

(Without frame curtain)

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 19" from the bottom of the upper sash to the window stool.

2. Installation Kits Contents

1 2 3 4 5

6 7 8 9 10

14 12 13

■ Top retainer bar is in the product package.

NO. NAME OF PARTS Q'TY

1 FRAME CURTAIN 2 2 SUPPORT BRACKET 2 3 SILL BRACKET 2

4 LOCK NUT 4 5 SCREW (TYPE A) 14 6 SCREW (TYPE B) 7 7 SCREW (TYPE C) 5 8 SCREW (TYPE D) 2

9 CARRIAGE BOLT 2 10 FOAM STRIP 1 11 FOAM SEAL 1 12 WINDOW LOCKING BRACKET 1 13 DRAIN PIPE 1 14 FRAME GUIDE 2 15 FOAM-PE 1

8 Room Air Conditioner

Cabinet Installation

NOTICE

Screw(Type B)

Front Angle

Sash track

Front angle

Window stool

Upper Guide

Support Bracket

Lock nut

Sill Bracket

Carriage Bolt

(Type B)

Cabinet Track hole

Support Bracket

Carriage bolt and lock nut

Machine screw(Type D) and lock nut

Outer edge of window sill

Sill bracket

Window sash

Upper Guide

Cabinet

Foam

-Seal

Frame curtain

Foam-PE

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.

Installation

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

4. Pull the bottom window sash down behind the Top retainer

water in bottom pan.

bar until they meet.

Figure 2

Figure 3

Figure 4

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.

Figure 5

Figure 6

Service Manual 9

Installation

(Type C)

Window locking bracket

Foam-Strip

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. 7)

7. Slide the unit into the cabinet. (See Fig. 8)

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

Figure 7

Screw

8. Cut the Foam-strip to the proper length and insert between the upper window sash and the lower window sash. (See Fig. 9)

9. Attach the Window locking bracket with a screw (Type C). (See Fig. 10)

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.11)

Power Cord

Figure 8

Figure 9

Figure 10

Screw

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

through the front grille. (See Fig. 11)

12. Window installation of room air conditioner is now

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

10 Room Air Conditioner

Figure 11

Operation

Function of Controls

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.

DISPLAY

Cool

Energy

Saver

Fan

Dry Timer

3 45

PRECAUTION:

F1 LOW F2 MED F3 HIGH

TEMP

TIMER POWERMODE

FAN

SPEED

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

Power

Temp

Fan Speed

Timer Mode

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.a

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

Service Manual 11

Disassembly

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

Mechanical Parts

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 13)

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 14)

4. Remove the cabinet.

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

Figure 13

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 15)

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

procedure, above. (Refer to the wiring diagram found on page 22 in this manual and on the control box.)

Figure 14

12 Room Air Conditioner

Figure 15Figure 15

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