LG LWB0760ACG / LWB0811CCL Service Manual ▷ View online
—2—
1. PREFACE
1.1 SAFETY PRECAUTIONS ...............................2
1.2 INSULATION RESISTANCE TEST.................2
1.3 SPECIFICATIONS ..........................................3
1.4 FEATURES .....................................................6
1.5 CONTROL LOCATIONS .................................6
2. DISASSEMBLY INSTRUCTIONS
2.1 MECHANICAL PARTS....................................8
2.1.1 FRONT GRILLE .....................................8
2.1.2 CABINET................................................8
2.1.3 CONTROL BOX .....................................8
2.2 AIR HANDLING PARTS..................................9
2.2.1 AIR GUIDE.............................................9
2.2.2 BLOWER................................................9
2.2.3 FAN, SHROUD ....................................10
2.3 ELECTRICAL PARTS ...................................10
2.3.1 OVERLOAD PROTECTOR..................10
2.3.2 COMPRESSOR ...................................10
2.3.3 CAPACITOR ........................................11
2.3.4 POWER CORD ....................................11
2.3.5 THERMOSTAT ....................................11
2.3.6 ROTARY SWITCH ...............................11
2.3.7 MOTOR................................................12
2.4 REFRIGERATION CYCLE............................12
2.4.1 CONDENSER ......................................12
2.4.2 EVAPORATOR ....................................12
2.4.3 CAPILLARY TUBE...............................13
3. INSTALLATION
3.1 SELECT THE BEST LOCATION ..................15
3.2 HOW TO INSTALL ........................................15
4. TROUBLESHOOTING GUIDE
4.1 OUTSIDE DIMENSIONS...............................17
4.2 PIPING SYSTEM ..........................................17
4.3 TROUBLESHOOTING GUIDE......................18
5. SCHEMATIC DIAGRAM
5.1 CIRCUIT DIAGRAM ......................................27
5.2 ELECTRONIC CONTROL DEVICE ..............32
5.3 COMPONENTS LOCATION (OF MAIN P.C.B ASM) .......33
5.4 COMPONENTS LOCATION (OF DISPLAY P.C.B ASM) ......33
5.5 ELECTRONIC CONTROL DEVICE .............34
5.6 COMPONENTS LOCATION(OF MAIN P.C.B ASM) ....35
5.7 COMPONENTS LOCATION(OF DISPLAY P.C.B ASM) ...35
6. EXPLODED VIEW
..................................36
7. REPLACEMENT PARTS LIST
.......37
1. PREFACE
This
SERVICE MANUAL
provides various service information, the mechanical and electrical parts etc.
This room air conditioner was manufactured and assembled under a strict quality control system.
The refrigerant is charged at the factory. Be sure to read the safety precautions prior to servicing the unit.
The refrigerant is charged at the factory. Be sure to read the safety precautions prior to servicing the unit.
1.1 SAFETY PRECAUTIONS
1. When servicing the unit, set the ROTARY SWITCH
or POWER SWITCH to OFF and unplug the power
cord.
cord.
2. Observe the original lead dress.
If a short circuit is found, replace all parts which
have been overheated or damaged by the short
circuit.
have been overheated or damaged by the short
circuit.
3. After servicing the unit, make an insulation resis-
tance test to protect the customer from being
exposed to shock hazards.
exposed to shock hazards.
1.2 INSULATION RESISTANCE TEST
1. Unplug the power cord and connect a jumper
between 2 pins (black and white).
2. The grounding conductor (green or green & yellow)
should be open.
3. Measure the resistance value with an ohm meter
between the jumpered lead and each exposed
metallic part on the equipment at all the positions
(except OFF or O) of the ROTARY SWITCH.
metallic part on the equipment at all the positions
(except OFF or O) of the ROTARY SWITCH.
4. The value should be over 1M
Ω
.
CONTENTS
—3—
1.3 SPECIFICATIONS
1.3.1 FOR LWB0811CCL, LWB0811CCG, LWB0810ACL, LWB0810ACG,
LWB071ACL, LWB071ACG, LWB0710NCL, LWB0710NCG
POWER SUPPLY
COOLING CAPACITY
(Btu/h)
INPUT
(W)
RUNNING CURRENT
(A)
E.E.R
(Btu/W.h)
INDOOR
(°C)
OUTDOOR
(°C)
REFRIGERANT (R-22) CHARGE
EVAPORATOR
CONDENSER
FAN, INDOOR
FAN, OUTDOOR
FAN SPEEDS, FAN/COOLING
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
7,800
8,000
7,000
780
800
760
7.0
7.2
7.0
10.0
10.0
9.2
26.7(DB)*
19.4(WB)**
35(DB)
23.9(WB)
450g(15.9 Oz)
450g(15.9 Oz)
350g(12.4 Oz)
2 ROW 14 STACKS
2 ROW 16 STACKS
BLOWER
PROPELLER TYPE FAN WITH SLINGER-RING
2/2
6 POLES
ROTARY SWITCH
THERMOSTAT
HORIZONTAL LOUVER (RIGHT & LEFT)
VANE (UP & DOWN)
SLIDE IN-OUT CHASSIS
OVERLOAD PROTECTOR
INTERNAL THERMAL PROTECTOR
1.8m(7') (3 WIRE WITH GROUDING)
ATTACHMENT PLUG (CORD-CONNECTED TYPE)
SPLASHED BY FAN SLINGER
71/32
20
1
/
16
x 13
7
/
8
x 19
3
/
16
510 x 353 x 487
1ø, 115V, 60Hz
LWB0811CCL/G
LWB0810ACL/G
MODELS
ITEMS
OPERATING
TEMPERATURE
* DB : dry bulb
** WB : wet bulb
** WB : wet bulb
LWB0710ACL/G
LWB0710NCL/G
LWB0710NCL/G
—4—
POWER SUPPLY
COOLING CAPACITY
(Btu/h)
INPUT
(W)
RUNNING CURRENT
(A)
E.E.R
(Btu/W.h)
INDOOR
(°C)
OUTDOOR (°C)
REFRIGERANT (R-22) CHARGE
EVAPORATOR
CONDENSER
FAN, INDOOR
FAN, OUTDOOR
FAN SPEEDS, FAN/COOLING
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
8,000
7,000
9,000
800
775
1,000
3.7
3.2
4.4
10.0
9.0
9.0
27(DB)
19(WB)
35(DB)
24(WB)
350g(12.4Oz)
330g(11.6Oz)
430g(15.2Oz)
2 ROW 14 STACKS
2 ROW 16 STACKS
BLOWER
PROPELLER TYPE FAN WITH SLINGER-RING
2/2
6 POLES
ROTARY SWITCH
THERMOSTAT
HORIZONTAL LOUVER (RIGHT & LEFT)
VANE (UP & DOWN)
SLIDE IN-OUT CHASSIS
OVERLOAD PROTECTOR
INTERNAL THERMAL PROTECTOR
1.8m(7') (3 WIRE WITH GROUDING)
ATTACHMENT PLUG (CORD-CONNECTED TYPE)
SPLASHED BY FAN SLINGER
71/32
20
1
/
16
x 13
7
/
8
x 19
3
/
16
510 x 353 x 487
1ø, 220V~, 60Hz
1ø, 220/240V~, 50Hz
LWB0820ACL/G
LWB0760ACL/G
LWB0960ACL/G
MODELS
ITEMS
OPERATING
TEMPERATURE
1.3.2 FOR LWB0820ACL, LWB0820ACG, LWB0760ACL, LWB0760ACG,
LWB0960ACL, LWB0960ACG
—5—
POWER SUPPLY
COOLING CAPACITY
(Btu/h)
INPUT
(W)
RUNNING CURRENT
(A)
E.E.R
(Btu/W.h)
INDOOR
(°C)
OUTDOOR (°C)
REFRIGERANT (R-22) CHARGE
EVAPORATOR
CONDENSER
FAN, INDOOR
FAN, OUTDOOR
FAN SPEEDS, FAN/COOLING
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, 110V, 60Hz
1ø, 220V~, 60Hz
1ø, 220V~, 60Hz
1ø, 220-240V~, 50Hz
7,000
7,142
7,142
9,000
760
790
790
1,000
7.0
3.7
3.7
4.4
9.2
9.0
9.0
9.0
27(DB) 19.5(WB)
27(DB) 19(WB)
27(DB) 19(WB)
27(DB) 19(WB)
35(DB) 24(WB)
35(DB) 24(WB)
35(DB) 24(WB)
35(DB) 24(WB)
350g(12.4Oz)
350g(12.4Oz)
350g(12.4Oz)
430g(15.2Oz)
2 ROW 14 STACKS
2 ROW 16 STACKS
BLOWER
PROPELLER TYPE FAN WITH SLINGER-RING
2/2
6 POLES
REMOTE CONTROL
THERMISTOR
HORIZONTAL LOUVER (RIGHT & LEFT)
VANE (UP & DOWN)
SLIDE IN-OUT CHASSIS
OVERLOAD PROTECTOR
INTERNAL THERMAL PROTECTOR
1.8m(7') (3 WIRE WITH GROUDING)
ATTACHMENT PLUG (CORD-CONNECTED TYPE)
SPLASHED BY FAN SLINGER
71/32
20
1
/
16
x 13
7
/
8
x 19
3
/
16
510 x 353 x 487
LW-B0713CL
LW-B0723CL
LWB0720NCL/G
LWB0960PCL/G
MODELS
ITEMS
OPERATING
TEMPERATURE
1.3.3 FOR LW-B0713CL, LW-B0723CL, LWB0720NCL, LWB0720NCG,
LWB0960PCL, LWB090PCG