LG LWHD2400HRY7, LWHD2400HR, LWHD1807HR, LWHD1800HR Service Manual
LG
Room
Air Conditioner
SERVICE MANUAL
LG
MODEL: LWHD1800HR, LWHD2400HR
CAUTION
website http://www.lgservice.com
• BEFORE SERVICING THE UNIT, READ THE SAFETY
PRECAUTIONS IN THIS MANUAL.
• ONLY FOR AUTHORIZED SERVICE PERSONNEL.
LWHD1807HR, LWHD2400HRY7
2 Room Air Conditioner
Air Conditioner Service Manual
TABLE OF CONTENTS
Safety Precautions..........................................................................................................................................3
Dimensions......................................................................................................................................................5
Product Specifications...................................................................................................................................6
Installation .......................................................................................................................................................8
How to Install the Unit ................................................................................................................................8
How to use the Reversible Inlet grille .........................................................................................................8
Window Requirements ...............................................................................................................................9
Installation Kits Contents (some models including installation kit)...........................................................10
Suggested tool Requirements..................................................................................................................10
Cabinet Installation...................................................................................................................................11
Operation .......................................................................................................................................................13
Disassembly instructions.............................................................................................................................14
Mechanical parts......................................................................................................................................14
Air Handling Parts ....................................................................................................................................15
Electrical Parts .........................................................................................................................................16
Refrigeration cycle ...................................................................................................................................19
Schematic Diagram.......................................................................................................................................22
Troubleshooting guide..................................................................................................................................23
Piping System ..........................................................................................................................................23
Troubleshooting guide ..............................................................................................................................24
Room Air Conditioner Voltage Limits........................................................................................................26
Exploded View...............................................................................................................................................28
Replacement Parts List ................................................................................................................................29
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(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.
Gasolin
Sharp edges
Dimensions
Dimensions
H
W
D
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
W mm(inch) 660 (26) 660 (26)
H mm(inch) 428 (16
27
/32
) 428 (16
27
/32
)
D mm(inch) 675 (26
9
/
16) 770 (30
5
/
16)
Model
Dimension
LWHD1800HR LWHD2400HR
6 Room Air Conditioner
Specfications
Product Specifications
POWER SUPPLY
COOLING CAPACITY (Btu/h)
INPUT (W)
RUNNING CURRENT (A)
E.E.R (BTU/W.h)
HEATING CAPACITY (Btu/h)
INPUT (W)
RUNNING CURRENT (A)
INDOOR(°C)
OUTDOOR(°C)
INDOOR(°C)
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
ELECTRIC HEATER
COMPRESSOR
PROTECTOR FAN MOTOR
ELECTRIC HEATER
POWER CORD
DRAIN SYSTEM
NET WEIGHT (lbs/kg)
OUTSIDE DIMENSION (inch)
(W x H x D) (mm)
1Ø, 208/230V, 60Hz 1Ø, 208/230V, 60Hz
17,500/18,000 23,00/23,500
1,800/1,850 2,700/2,760
9.0/8.3 13.2/12.2
9.7 8.5
9,800/12,00 9,400/11,600
3,100/3,670 3,750/3,770
15.0/16.0 15.0/16.0
26.7 (DB)* 19.4 (WB)**
35 (DB)* 23.9 (WB)**
21.1 (DB)* 15.6 (DB)**
8.3 (DB)* 6.1 (DB)**
710(25.0 oz) 880(31.0 oz)
3ROW 18STACKS 4ROW 18STACKS
2ROW 18STACKS,L-BENDING TYPE
3ROW 19STACKS
BLOWER
PROPELLER TYPE FAN WITH SLINGER-RING
1 / 2 / 2 1 / 2 / 2
6 POLES
TOUCH PANEL
THERMISTOR
VERTICAL LOUVER(RIGHT&LEFT)
HORIZONTAL LOUVER(UP&DOWN)
SLIDE IN-OUT CHASSIS
3.5KW, 230V
INTERNAL OVERLOAD PROTECTOR
INTERNAL THERMAL PROTECTOR
FUSE LINK, BIMETAL THERMOSTAT
1.6m(3 WIRE WITH GROUNDING)
ATTACHMENT PLUG(CORD-CONNECTED TYPE)
DRAIN PIPE OR SPLASHED BY FAN SLINGER
123/56 143/65
26 X 16
27
/32 X 26 9/16 26 X 16 27/32 X 30 5/16
660 X 428 X 675 660 X 428 X 770
LWHD1800HR LWHD2400HR
MODELS
ITEMS
OPERATING
CONDITION
COOLING
HEATING
* DB:Dry Bulb
**
WB:Wet Bulb
NOTE: Please refer to Label Quality on the produst since this specification may be changed for improving performance.
7 Room Air Conditioner
Specfications
Product Specifications
POWER SUPPLY
COOLING CAPACITY (Btu/h)
INPUT (W)
RUNNING CURRENT (A)
E.E.R (BTU/W.h)
HEATING CAPACITY (Btu/h)
INPUT (W)
RUNNING CURRENT (A)
INDOOR(°C)
OUTDOOR(°C)
INDOOR(°C)
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
ELECTRIC HEATER
COMPRESSOR
PROTECTOR FAN MOTOR
ELECTRIC HEATER
POWER CORD
DRAIN SYSTEM
NET WEIGHT (lbs/kg)
OUTSIDE DIMENSION (inch)
(W x H x D) (mm)
1Ø, 208/230V, 60Hz 1Ø, 208/230V, 60Hz
17,500/18,000 23,00/23,500
1,800/1,850 2,700/2,760
9.0/8.3 13.2/12.2
9.7 8.5
9,800/12,00 9,400/11,600
3,100/3,670 3,750/3,770
15.0/16.0 15.0/16.0
26.7 (DB)* 19.4 (WB)**
35 (DB)* 23.9 (WB)**
21.1 (DB)* 15.6 (DB)**
8.3 (DB)* 6.1 (DB)**
810(28.6oz) 1040(36.7oz)
3ROW 18STACKS 3ROW 15STACKS
2ROW 18STACKS,L-BENDING TYPE
2ROW 16STACKS
BLOWER
PROPELLER TYPE FAN WITH SLINGER-RING
1 / 2 / 2 1 / 2 / 2
6 POLES
TOUCH PANEL
THERMISTOR
VERTICAL LOUVER(RIGHT&LEFT)
HORIZONTAL LOUVER(UP&DOWN)
SLIDE IN-OUT CHASSIS
3.5KW, 230V
INTERNAL OVERLOAD PROTECTOR
INTERNAL THERMAL PROTECTOR
FUSE LINK, BIMETAL THERMOSTAT
1.6m(3 WIRE WITH GROUNDING)
ATTACHMENT PLUG(CORD-CONNECTED TYPE)
DRAIN PIPE OR SPLASHED BY FAN SLINGER
123/56 143/65
26 X 16
27
/32 X 26 9/16 26 X 16 27/32 X 30 5/16
660 X 428 X 675 660 X 428 X 770
LWHD1807HR LWHD2400HRY7
MODELS
ITEMS
OPERATING
CONDITION
COOLING
HEATING
* DB:Dry Bulb
**
WB:Wet Bulb
NOTE: Please refer to Label Quality on the produst since this specification may be changed for improving performance.
Service Manual 8
Installation
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 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 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
9 Room Air Conditioner
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)
Service Manual 10
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
Figure 1
Figure 2
Figure 3
Figure 4
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