LWG0760AHG_AHN_AHE — LG Air Conditioner Service Manual (repair manual)

Model
LWG0760AHG_AHN_AHE
Pages
60
Size
2.87 MB
Type
PDF
Document
Service Manual
Brand
Device
Air Conditioner
File
lwg0760ahg-ahn-ahe.zip
Date

View LG LWG0760AHG_AHN_AHE Service Manual online

—2—
1. PREFACE
1.1 SAFETY PRECAUTIONS................................2
1.2 INSULATION RESISTANCE TEST .................2
1.3 SPECIFICATIONS...........................................3
1.4 FEATURES......................................................4
1.5 CONTROL LOCATIONS .................................4
2. DISASSEMBLY INSTRUCTIONS
2.1 MECHANICAL PARTS ....................................6
2.1.1 FRONT GRILLE .....................................6
2.1.2 CABINET ................................................6
2.1.3 CONTROL BOX .....................................6
2.2 AIR HANDLING PARTS ..................................7
2.2.1 AIR GUIDE AND BLOWER ....................7
2.2.2 FAN AND SHROUD ...............................7
2.3 ELECTRICAL PARTS......................................8
2.3.1 OVERLOAD PROTECTOR ....................8
2.3.2 COMPRESSOR......................................8
2.3.3 CAPACITOR...........................................9
2.3.4 POWER CORD ......................................9
2.3.5 THERMOSTAT .......................................9
2.3.6 ROTARY SWITCH .................................9
2.3.7 MOTOR ................................................10
2.3.8 REVERSING VALVE ASS'Y.................10
2.4 REFRIGERATION CYCLE ............................11
2.4.1 CONDENSER.......................................11
2.4.2 EVAPORATOR.....................................11
2.4.3 CAPILLARY TUBE ...............................11
3. INSTALLATION
3.1 SELECT THE BEST LOCATION...................14
3.2 HOW TO INSTALL ........................................14
3.3 HOW TO USE THE REVERSIBLE INLET GRILLE...15
4. TROUBLESHOOTING GUIDE
4.1 OUTSIDE DIMENSIONS ...............................16
4.2 PIPING SYSTEM...........................................17
4.3 TROUBLESHOOTING GUIDE ......................18
5. SCHEMATIC DIAGRAM
5.1 CIRCUIT DIAGRAM ......................................26
5.2 DEICER P.C.B ASS'Y ...................................28
5.3 ELECTRONIC CONTROL DEVICE...............29
5.4 COMPONENTS LOCATION
(OF MAIN P.C.B ASS'Y)................................30
5.5 COMPONENTS LOCATION
(OF DISPLAY P.C.B ASS'Y)..........................30
6. EXPLODED VIEW
..................................31
7. REPLACEMENT PARTS LIST
........32
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.
1.1 SAFETY PRECAUTIONS
1. When servicing the unit, set the ROTARY SWITCH or
POWER SWITCH to OFF and unplug the power 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.
3. After servicing the unit, make an insulation resis-
tance test to protect the customer from being
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
between the jumpered lead and each exposed
metallic part on the equipment at all the positions
(except OFF) of the ROTARY SWITCH.
4. The value should be over 1M
.
CONTENTS
—3—
POWER SUPPLY
CAPACITY
(BTU/h)
COOLING
INPUT
(W)
RUNNING CURRENT
(A)
E.E.R
(BUT/h.W)
CAPACITY
(BTU/h)
HEATING
INTUP
(W)
RUNNING CURRENT
(A)
E.E.R
(BTU/h.W)
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)
1ø, 220~240V~, 50Hz
6,800
750
3.2
9.0
6,500
670
2.8
9.7
27(DB)*
19(WB)**
35(DB)*
24(WB)**
20(DB)*
15(WB)**
7(DB)*
6(WB)**
420g (14.8 Oz)
2 ROW 14 STACKS, SLIT-FIN TYPE
2 ROW 16 STACKS, LOUVERED-FIN TYPE
BLOWER
PROPELLER TYPE FAN WITH SLINGER-RING
1/2/2
4 POLES
ROTARY SWITCH
TOUCH & REMOTE CONTROL
THERMOSTAT
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
77/35
18
1
/
2
x 13
7
/
x 20
11
/
16
470 x 353 x 525
LWG0760AHG/AHN/AHE
LWG0760PHG/PHN/PHE
MODELS
ITEMS
OPERATING
TEMPERA-
TURE
1.3 SPECIFICATIONS
1.3.1 LWG0760AHG/AHN/AHE, LWG0760PHG/PHN/PHE
* DB:Dry Bulb
** WB:Wet Bulb
—4—
1.4 FEATURES
• Designed for cooling or heating.
• Powerful and quiet cooling.
• Slide-in and slide-out chassis for the simple
installation and service.
• Reversible inlet grille.
1.5 CONTROL LOCATIONS
1.5.1 HEAT PUMP MODEL WITH ROTARY TYPE
• 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 
£
to horizontal line with part 
£
.
• HEATER LAMP
When the unit sets heating operation condition, the
green lamp is lighted.
When the frost settles on the heat exchanger of the
outside, defrosting is made automatically and the
green lamp is unlighted. The until it may hiss and the
fan motor will stop for 1 to 10 minutes.
This should not be regarded as trouble. After
defrosting, the heating operation begins again.
• THERMOSTAT
Turn the thermostat control to the desired setting.
The central position is a normal setting for average
conditions. 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
counterclockwise.
• OPERATION
OFF
(  ) : Turns the air conditioner off.
LOW 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.
• Side air-intake, side cooled-air discharge.
• Built in adjustable THERMOSTAT.
• Washable one-touch filter.
• Compact size.
Part A
Part B
VENT
CLOSE
OPEN
Heater
WARMER
COOLER
Wait Three Minutes
Before Restarting
—5—
TEMPERATURE SETTING
• 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).
FAN SPEED
• Everytime you push this button it is set as follows. {High(F2)  Low(F1)  High(F2)...}.
FAN SPEED
• Everytime you push this button it is set as follows.
  {High(F2)
Low(F1)
High(F2)...}.
POWER
• 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.
• When you fist turn on, High Cool mode and 19˚C are set automatically(If Indoor Temp. not less than 21˚C),
  however High Heat mode and 23˚C set (If Indoor Temp. less than 21˚C). 
MODE
• Everytime you push this button, it will toggle between Cool, Fan and Heat.
ON/OFF TIMER
- STOPPING OPERATION
• Everytime you push this button,  when the air conditioner is operating, timer is set as follows. 
  (1Hour    2Hours    3Hours    4Hours    5Hours    6Hours    7Hours    8Hours    9Hours
  10Hours    11Hours    12Hours    Cancel)
• The Setting Temperature will be raised by 2
°
F(1
°
C) 30min. later and by 2
°
F(1
°
C) after another 30 min.
- STARTING OPERATION
• Everytime you push this button, when the air conditioner is not operating, timer is set as follow. 
  (1Hour    2Hours    3Hours    4Hours    5Hours    6Hours    7Hours    8Hours    9Hours
  10Hours    11Hours    12Hours    Cancel)
REMOTE CONTROL SIGNAL RECEIVER
MODE
• Select Cooling or Fan mode Heating with this button.
POWER
• 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.
• When you fist turn on, High Cool mode and 19˚C are set
  automatically(If Indoor Temp. not less than 21˚C),
  however High Heat mode and 23˚C set (If Indoor Temp.
  less than 21˚C).
TEMPERATURE SETTING
• 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).
AUTO RESTART SWITCH
In failure of electric power, if the switch is set to "ON",
the unit runs as previous setting operation when
power returns.
ON/OFF TIMER
• Everytime you push this button, timer is set as follows. 
  (1Hour    2Hours    3Hours    4Hours    5Hours    6Hours
  7Hours    8Hours    9Hours    10Hours    11Hours    12Hours    Cancel)
• The Setting Temperature will be raised by 2
°
F(1˚C) 30min.
   later and by 2
°
F after another 30 min.
1.5.2 HEAT PUMP MODEL WITH REMOTE CONTROL AND TOUCH TYPE
• DISPLAY
• REMOTE CONTROLLER
Precaution: The Remote Controller will not function properly if strong light strikes the sensor window of the air
conditioner or if there are obstacles between the Remote Controller and the air conditioner.
Page of 60
Display

Download LG LWG0760AHG_AHN_AHE Service Manual (Repair Manual)

Here you can view online or download LG LWG0760AHG_AHN_AHE Service Manual in pdf. This Service Manual can help you recover, restore, fix, disassemble and repair LG LWG0760AHG_AHN_AHE Air Conditioner. Information contained in LG LWG0760AHG_AHN_AHE service manual (repair manual) typically includes:

  • Disassembly, troubleshooting, programming, maintenance, remote, adjustment, installation and setup instructions.
  • Schematics, wiring and block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Parts list (bill of materials).