LG ARTCOOL LAN181CNW User manual

LG
Room Air Conditioner
SERVICE MANUAL
LG
MODELS: LAN181CNW(ASNC183VML3)
LAU181CNW(ASUC183VML3)
LA180CPI (ASNC183VML3)
LA180CPO (ASUC183VML3)
CAUTION
website http://www.lgservice.com
• BEFORE SERVICING THE UNIT, READ THE SAFETY
PRECAUTIONS IN THIS MANUAL.
• ONLY FOR AUTHORIZED SERVICE PERSONNEL.

2Room Air Conditioner
Details of 2006 LG Model Name.................................................................................................... 3
Safety Precautions......................................................................................................................... 4
Functions...................................................................................................................................... 10
Product References .................................................................................................................... 12
Dimensions................................................................................................................................... 13
Refrigeration Cycle Diagram....................................................................................................... 15
Wiring Diagram............................................................................................................................. 16
Operation Details ......................................................................................................................... 17
Display Function.......................................................................................................................... 23
Self-diagnosis Function ...............................................................................................................23
Introduction...................................................................................................................................24
Installation.................................................................................................................................... 25
Operation...................................................................................................................................... 42
Disassembly of the parts (Indoor Unit)...................................................................................... 43
2-way, 3-way Valve ....................................................................................................................... 46
Cycle Troubleshooting Guide ..................................................................................................... 54
Electronic Control Device............................................................................................................ 64
Schematic Diagram...................................................................................................................... 67
Exploded View and Replacement Parts List.............................................................................. 69
Air Conditioner Service Manual
TABLE OF CONTENTS

Service Manual 3
Details of 2006 LG Model Name
12
Code Type Code of Model Meaning
1 Producing Center/ A~Z L: ChangWon R22, A: ChangWon R410A, C: ChangWon
R407C
Refrigerant
2 Type of Air conditioner A~Z S: Split Type Air conditioner
3 Cooling/Heating A~Z C: C/O, H: H/P, X: C/O + E/H, Z: H/P + E/H
4,5 Capacity(Btu/h) 1~9 Cooling/Heating Capacity
Ex. "09" ➔9,000Btu/h
6 Electric Range 1~9 Electric Standard
1 ➔115V/60Hz 6 ➔220~240V/50Hz
2 ➔ 220V/60Hz 7 ➔110V, 50/60Hz
3 ➔208~230V/60Hz 8 ➔380~415V/50Hz
5 ➔200~220V/50Hz 9 ➔380~415V/60Hz
7 Chassis A~Z Name of tool of unit
8 Color A~Z R: Mirror B: Blue N: Walut
W: White M: Metal C: Cherry
9 Function A~Z
10 Serial No. 0~9
-
Basic A
Basic + 4Way B
Plasma Filter C
Plasma Filter + 4Way D
Tele + LED + 4Way E
Tele + LCD + Plasma F + 4Way F
Tele Multi + LCD + Plasma F + 4Way G
Low A + Plasma F H
Low A + Plasma F + 4Way J
Plasma F + 4Way + Oxygen Generator K
A/change + Plasma F L
A/change + Plasma F + 4Way M
345678910
Details of 2006 LG Model Name

4Room Air Conditioner
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.
This symbol indicates the possibility of death or serious injury.
This symbol indicates the possibility of injury or damage to properties only.
Be sure not to do.
Be sure to follow the instruction.
■Installation
Do not use damaged power
cords, plugs, or a loose socket.
• There is risk of fire or electric
shock.
For electrical work, contact the
dealer, seller, a qualified electri-
cian, or an Authorized Service
Center.
• 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.
Install the panel and the cover of
control box securely.
• There is risk of fire or electric
shock.
Do not modify or extend the
power cord.
• There is risk of fire or electric
shock.
Do not install, remove, or re-
install the unit by yourself (cus-
tomer).
• There is risk of fire, electric
shock, explosion or injury.

Service Manual 5
Safety Precautions
■Operation
Be cautious when unpacking
and installing the product.
• Shape edges could cause injury.
Be especially careful of the sharp
edges.
For installation, always contact
the dealer or an Authorized Ser-
vice Center.
• There is risk of fire, electric
shock, explosion, or injury.
Do not install the product on a
defective installation stand.
• It may cause injury, accident, or
damage to the product.
Be sure the installation area
does not deteriorate with age.
• If the base collapses, the air con-
ditioner could fall with it, causing
property damage, product failure,
and personal injury.
Install the indoor unit on the
wall where the height from the
floors more then 8ft(2.4m)
• There are sharp moving parts
that could cause personal injury.
Do not handle the pipe by your-
self(customer)
• High-Pressure refrigent may
cause personal injury.
Use a dedicated outlet for this
appliance.
• There is risk of fire or electric
shock.
Grasp the plug to remove the
cord from the outlet. Do not
touch it with wet hands.
• There is risk of fire or electric
shock.
Do not allow water to run into
electric part.
• There is risk of fire, failure of the
product, and/or electric shock.
8ft(2.4m)

6Room Air Conditioner
Safety Precautions
Do not place a heater or other
appliances near the power
cable.
• There is risk of fire, failure of the
product, and/or electric shock.
Do not let the air conditioner run
for a long time when the humidi-
ty is very high and a door or a
window is left open.
• Moisture may condense and wet
or damage furnishings.
Do not store of use flammable
gas or combustibles near the air
conditioner.
• There is risk of fire or product fail-
ure.
Do not use the product in a
tightly closed space for a long
time.
• Oxygen deficiency could occur.
• Some ventilation by opeing win-
dow is necessary for the fresh air.
When flammable gas leaks, turn off
the gas and open a window for venti-
lation before turning the product on.
Do not use the telephone or turn
switches on or off.
• There is risk of explosion or fire.
Unplug the unit if strange
sounds odors or smoke comes
from it.
•
There is risk of fireproduct failure
and/or electric shock.
Stop operation and close any
window in storm or hurricane.
before the hurricane arrives.
• There is risk of property damage,
failure of product, or electric
shock.
Do not open the inlet grill of the
product during operation. (Do
not touch the electrostatic filter,
if the unit is so equipped.)
• There is risk of physical injury,
electric shock, or product.
When the product is soaked
(flooded or submerged), contact
an Authorized Service Center.
• There is risk of electrical shock.
Wax
Thinner

Service Manual 7
Safety Precautions
Ventilate the product from time
to time when operating it togeth-
er with a stove, etc.
• There is risk of fire or electrical
shock.
Unplug the appliance before
performing cleaning or mainte-
nance.
• There is risk of electric shock.
When the product is not be used
for a long time disconnect the
power supply plug or turn off
the breaker.
• There is risk of product damage
or failure, or unintended opera-
tion.
Take care to ensure that nobody
could step on or fall onto the
outdoor unit.
• There could result in personal
injury and product damage.
Do not insert hands or other
objects through the air inlet or
outlet while the air conditioner
is plugged in.
• There are sharp and moving
parts that could cause personal
injury.
Always check for gas(refriger-
ant) leakage after installation or
repair of product.
• Low refrigerant levels may cause
product failure.
Install the drain hose to ensure
that water is drained away prop-
erly.
• A bad connection may cause
water leakage.
Keep level even when installing
the product.
• To avoid vibration or water leak-
age.
Do not install the product where
the noise or hot air from the out-
door unit could damage the
neighborhoods.
• It may cause a problem for your
neighbors.
90˚
■Installation

8Room Air Conditioner
Safety Precautions
■Operation
Use two or more people to lift
and transport the air conditioner
•Avoid personal injury.
Do not install the product where
it will be exposed to sea wind
(salt spray) directly.
•It may cause corrosion in the
product. Corrosion, particularly
on the condenser and evaporator
fins, could cause product mal-
function or inefficient operation.
Do not direct airflow at room
occupants.
•This could damage your health.
Do not use the product for special
purposes, such as preserving
foods, works of art, etc. It is a
consumer air conditioner, not a
precision refrigeration system.
•There is risk of damage or loss of
property.
Do not block the inlet or outlet
of air flow.
•It may cause product failure.
Use a soft cloth to clean.
Do not use harsh detergents,
solvents, etc.
•There is risk of fire, electric shock
or damage to the plastic parts of
the product.
Do not touch the metal parts of
the product when removing the
air filter. They are very sharp!
•There is risk of personal injury.
Do not step on or put anything
on the product. (outdoor unit)
•There is risk of personal injury
and failure of product.
Always insert the filter securely.
Clean the filter every two weeks
or more often if necessary.
•A dirty filter reduces the efficien-
cy of the air conditioner and

Service Manual 9
Safety Precautions
Do not drink the water drained
from the unit.
•It is not sanitary and could cause
serious health issues.
Use a firm stool or ladder when
cleaning or maintaining the air
conditioner.
•Be careful and avoid personal
injury.
Replace all the batteries in the
remote.
•There is risk of fire or explosion.
Do not recharge or disassemble the batteries. Do
not dispose of batteries in a fire.
•They may burn or explode.
If the liquid from the batteries gets onto your skin
or clothes, wash it well with clean water. Do not
use the remote if the batteries have leaked.
•The chemicals in batteries could cause burns or oth-
er health hazards.
■Disuse

10 Room Air Conditioner
Functions
•Room temperature sensor. (THERMISTOR)
•Maintains the room temperature in accordance with the Setting Temp.
•Indoor fan is delayed for 5 sec at the starting.
•Restarting is inhibited for approx. 3 minutes.
•High, Med, Low, CHAOS
•Intermittent operation of fan at low speed.
•The fan is switched to low(Cooling), med(Heating) speed.
•The unit will be stopped after 1, 2, 3, 4, 5, 6, 7 hours.
•The fan is switched to intermittent or irregular operation
• The fan speed is automatically switched from high to low speed.
•The louver can be set at the desired position or swing
up and down automatically.
Indoor Unit
Operation ON/OFF by Remote controller
Sensing the Room Temperature
Room temperature control
Starting Current Control
Time Delay Safety Control
Indoor Fan Speed Control
Operation indication Lamps (LED)
Soft Dry Operation Mode
•Both the indoor and outdoor fan stops dur-
ing defrosting.
•The indoor fan stops until the
evaporator pipe temperature will be reached
at 28°C.
Sleep Mode Auto Control
Natural Air Control by CHAOS Logic
Airflow Direction Control
Defrost(Deice) control (Heating)
Hot-start Control (Heating)
Signal Receptor
Receives the signals from the remote control.(Signal receiving sound: two short beeps or one long beep.)
Operation Indication Lamps
On/Off : Lights up during the system operation.
Sleep Mode : Lights up during Sleep Mode Auto operation.
Timer : Lights up during Timer operation.
Defrost Mode : Lights up during Defrost Mode or
Hot Start operation.(Heat pump model only)
Outdoor unit operation : Lights up during outdoor unit operation.
(Cooling model only)
Operation indication lamps
Functions