LG LWC1264AAG_AAN_ACE_ACF_ACN_ACP_BAG_BCF_BCG_BCS_ACG / LWC1264PAG_PAN_PCG_QAG_QAS_QAE / LWC1264AHE_AHF_AHG_ABG_BBG / LWC1264PBG_PHG_QBG_VBS / LWC126CGAB0 / LWC1264BAE / W12LH Service Manual ▷ View online
Room Air Conditioner
SERVICE MANUAL
MODELS: LWC1264AAG/AAN/ACE/ACF/ACN/ACP/BAG/BCF/BCG/BCS/ACG
LWC1264PAG/PAN/PCG/QAG/QAS/QAE
LWC1264AHE/AHF/AHG/ABG/BBG
LWC1264PBG/PHG/QBG/VBS
LWC126CGAB0
LWC1264BAE
LWC1264AHE/AHF/AHG/ABG/BBG
LWC1264PBG/PHG/QBG/VBS
LWC126CGAB0
LWC1264BAE
CAUTION
- BEFORE SERVICING THE UNIT, READ THE "SAFETY
PRECAUTIONS" IN THIS MANUAL.
- ONLY FOR AUTHORIZED SERVICE.
—2—
1. PREFACE
1.1 SAFETY PRECAUTIONS............................... 2
1.2 INSULATION RESISTANCE TEST ................ 2
1.3 SPECIFICATIONS.......................................... 3
1.4 FEATURES..................................................... 5
1.5 CONTROL LOCATIONS ............................ 5~7
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 AND BLOWER ................... 9
2.2.2 FAN ....................................................... 9
2.2.3 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
2.3.8 REVERSING VALVE ASSY ................ 12
2.4 REFRIGERATION CYCLE ................................ 13
2.4.1 CONDENSER...................................... 13
2.4.2 EVAPORATOR.................................... 13
2.4.3 CAPILLARY TUBE .............................. 13
3. INSTALLATION
3.1 SELECT THE BEST LOCATION.................. 16
3.2 CHECK OF INSTALLATION......................... 16
3.3 HOW TO DRAIN........................................... 16
3.4 HOW TO ATTACH DRAIN PAN ................... 16
3.5 HOW TO INSTALL ....................................... 17
3.6 HOW TO USE THE REVERSING INLET GRILLE ....... 18
4. TROUBLESHOOTING GUIDE
4.1 OUTSIDE DIMENSIONS .............................. 19
4.2 PIPING SYSTEM.......................................... 19
4.3 TROUBLESHOOTING GUIDE ..................... 20
5. SCHEMATIC DIAGRAM
5.1 CIRCUIT DIAGRAM ..................................... 33
5.2 DEICER P.C.B ASSY ................................... 40
5.3 ELECTRONIC CONTROL DEVICE.............. 41
5.4 COMPONENTS LOCATION(OF MAIN P.C.B ASM) .........42
5.5 COMPONENTS LOCATION(OF DISPLAY P.C.B ASM).... 42
6. EXPLODED VIEW AND
REPLACEMENT PARTS LIST
....... 43
1. PREFACE
This
SERVICE MANUAL
provides various service information, including 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) is to be open.
3. Measure the resistance value with an ohm meter
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) of the ROTARY SWITCH.
metallic part on the equipment at all the positions
(except OFF) of the ROTARY SWITCH.
4. The value should be over 1M
Ω
.
CONTENTS
—3—
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)
12,000
1,260
5.3 / 5.7
5.6
9.5
27(DB)*
19(WB)**
35(DB)*
24(WB)**
370g (13.1 Oz)
490g (17.3 Oz)
2 ROW 16 STACKS, LOUVERED-FIN TYPE
2 ROW 17 STACKS, LOUVERED-FIN TYPE
TURBO FAN
PROPELLER TYPE FAN WITH SLINGER-RING
2/3
3/3
2/3
4 POLES
ROTARY SWITCH OR ROCKER SWITCH
ROTARY SWITCH OR ROCKER SWITCH
THERMOSTAT
THERMISTOR
THERMOSTAT
VERTICAL LOUVER (RIGHT & LEFT)
HORIZONTAL LOUVER (UP & DOWN)
SLIDE IN-OUT CHASSIS
OVERLOAD PROTECTOR
INTERNAL THERMAL PROTECTOR
1.8m(7") (3 WIRE WITH GROUDING)
ATTACHMENT PLUG (CORD-CONNECTED TYPE)
DRAIN PIPE OR SPLASHED BY FAN SLINGER
90/41
23
5
/
8
x 14
31
/
32
x 21
7
/
8
600 x 380 x 555
1ø, 220V-240V~, 50Hz
LWC1264AAG/AAN/
ACE/ACF/ACN/ACP/ACG
LWC1264BAG/BCF/
BCG/BCS/BAE
LWC164PAG/PAN/PCG LWC1264QAG/QAS/QAE
LWC126CGAB0
MODELS
ITEMS
OPERATING
CONDITION
1.3 SPECIFICATIONS
1.3.1 FOR LWC1264AAG/AAN/ACE/ACF/ACG/ACN/ACP, LWC1264BAG/BCF/BCG/BCS,
LWC164PAG/PAN/PCG, LWC1264QAG/QAS, LWC126CGAB0, LWC1264BAE/QAE
* DB:Dry Bulb
** WB:Wet Bulb
** WB:Wet Bulb
—4—
1.3.2 FOR LWC1264AHE/AHF/AHG, LWC1264BBG, LWC1264PBG/PHG, LWC1264QBG/VBS
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)
COOLING
INDOOR
(°C)
OUTDOOR (°C)
HEATING
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
PROTECTOR
COMPRESSOR
FAN MOTOR
POWER CORD
DRAIN SYSTEM
NET WEIGHT
(lbs/kg)
OUTSIDE DIMENSION (inch)
(W x H x D) (mm)
11,500
1,350
5.7
8.5
11,500
1,150
5.0
10.0
27 (DB)* 19 (WB)**
35 (DB) 24 (WB)
20 (DB) 15 (WB)
7 (DB) 6 (WB)
730g (25.8 Oz)
2ROW 13STACKS, LOUVERED-FIN TYPE
2ROW 14STACKS, LOUVERED-FIN TYPE
TURBO FAN
PROPELLER TYPE FAN WITH SLINGER-RING
1/2/2
2/2/2
4 POLES
ROTARY SWITCH
WIRELESS REMOCON
THERMOSTAT
THERMISTOR
VERTICAL LOUVER (RIGHT & LEFT)
HORIZONTAL LOUVER (UP & DOWN)
SLIDE IN-OUT CHASSIS
OVERLOAD PROTECTOR
INTERNAL THERMAL PROTECTOR
1.8m (7") (3 WIRE WITH GROUDING)
ATTACHMENT PLUG (CORD-CONNECTED TYPE)
DRAIN PAN OR SPLASHED BY FAN SLINGER
101/46
101/46
1ø, 220V-240V~,50Hz
LWC1264AHE/
AHF/AHG
LWC1264BBG
LWC1264PBG/
PHG
LWC1264QBG/
VBS
MODELS
ITEMS
OPERATING
TEMPERA-
TURE
* DB : dry bulb
** WB : wet bulb
23
5
/
8
x 14
31
/
32
x 21
7
/
8
600 x 380 x 555