LG LF300CP(LP-C303R20), LF480CE(L User manual

Floor Standing Type
Air Conditioner
SERVICE MANUAL
MODEL: LF300CP(LP-C303R20)
LF480CE(LP-C483TA0)

Contents
–2–
Safety Precautions..................................................................................................................3
Functions .................................................................................................................................7
Product Specifications .........................................................................................................10
Dimensions............................................................................................................................11
Wiring Diagram......................................................................................................................15
Operation Details ..................................................................................................................17
Installation of Indoor, Outdoor Unit.....................................................................................23
Test Running .........................................................................................................................25
Troubleshooting Guide .........................................................................................................27
Exploded View and Replacement Parts List.......................................................................41

–3–
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.
■Installation
Be sure not to do.
Be sure to follow the instruction.
Do not use a defective or
underrated circuit breaker. Use
this appliance on a dedicated
circuit.
• There is risk of fire or electric
shock.
Always ground the product.
• There is risk of fire or electric
shock.
Install the panel and the cover
of control box securely.
• There is risk of fire or electric
shock.
Always install a dedicated
circuit and breaker.
• Improper wiring or installation may
cause fire or electric shock
Use the correctly rated
breaker or fuse.
• There is risk of fire or electric
shock.
Do not modify or extend the
power cable.
• There is risk of fire or electric
shock.

–4–
■Operational
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.
For installation, always
contact the dealer or an
Authorized Service 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
conditioner could fall with it,
causing property damage, product
failure, and personal injury.
Do not let the air conditioner
run for a long time when the
humidity is very high and a
door or a window is left open.
• Moisture may condense and wet or
damage furniture.
Do not touch(operate) the
product with wet hands.
• There is risk of fire or electrical
shock.
Do not place a heater or other
appliances near the power
cable.
• There is risk of fire or electric
shock.
Do not let electric parts of the
product get wet.
• There is risk of fire, failure of the
product, or electric shock.

–5–
■Installation
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 failure.
Be cautious that water could not enter the
product.
• There is risk of fire, electric shock, or product damage.
Always check for gas (refrigerant) leakage after
installation or repair of product.
• Low refrigerant levels may cause failure of product.
Install the drain hose to ensure that water is
drained away properly.
• A bad connection may cause water leakage.
Do not store or use flammable gas or
combustibles near the product.
• There is risk of fire or failure of product.
If strange sounds, or small or smoke comes
from product. Turn the breaker off or
disconnect the power supply cable.
• There is risk of electric shock or fire.
Gasolin

–6–
Keep level even when installing the product.
• To avoid vibration or water leakage.
Use two or more people to lift and transport
the product.
• Avoid personal injury.
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 anyting on the product.
(outdoor units)
• There is risk of personal injury and failure of product.
Do not insert hands or other objects through
the air inlet or outlet while the product is
operated.
• There are sharp and moving parts that could cause
personal injury.
90˚
Wax
Thinner
■Operational

–7–
Indoor Unit
Power Switch ON/OFF
Operation Mode Control
Indoor Fan Speed Control
Room Temperature control
Sensing Heat Exchanger Temperature
Soft Dry Operation Mode
Time Delay Safety Control
AutoRestart
•Cooling, Heating, Soft Dry, Fan
•High, Med & Low
•Maintains the room temperature in accordance with the Setting Temp.
•Up: up to 30°C(86.0°F)
•Down: down to 16°C(60.8°F)
•Heat exchanger temperature sensor (Thermistor)
•Intermittent operation of fan at low speed.
•Restarting is inhibited for approx. 3 minutes.
•The power comes on again after a power failure.
Functions

–8–
•Intermittent operation of fan at low speed.
•Used to circulate room air without cooling.
•OFF Timer (1, 2, 3,......7 hour)
•Airflow direction Auto-swing and Manual Contol.
•Up: up to 30°C(86.0°F)
•Down: down to 16°C(60.8°F)
•High, Med & Low
Remote Control
Operation ON/OFF
Cooling Operation Mode
Heating Operation Mode
Sot Dry Operation Mode
Fan Operation
Timer Control
Airflow Direction Control
Room Temperature Control
Indoor Fan speed control

–9–
Outdoor Unit
Deice Control
Outdoor Fan Speed Control
Sensing Heat Exchanger Temperature
•De-ice PCB
(Heating Model Only)
•One speed
•Heat exchanger temperature sensor (Thermistor)

Product Specifications
–10–
POWER SOURCE (ø, V, Hz)
COOLING CAPACITY BTU/h
W
INPUT W
CURRENT A
HEATING CAPACITY BTU/h
W
INPUT W
CURRENT A
MAKER
TYPE
COMPRESSOR MODEL
CAPACITY BTU/h
CURRENT A
INPUT W
NOISE INDOOR dB(A)
LEVEL(1m) OUTDOOR
AIR INDOOR CMM
VOLUME OUTDOOR (CFM)
REFRIGERANT R-22
kg(Oz)
HEAT INDOOR R/C/FPI
EXCHANGER OUTDOOR R/C/FPI
FAN INDOOR TYPE
OUTDOOR
ROOM TEMPERATURE CONTROL
NET INDOOR kg(lbs)
WEIGHT OUTDOOR
Gross Weight INDOOR kg(lbs)
OUTDOOR
DIMENSIONS INDOOR mm
(W ¥H ¥D) OUTDOOR (Inch)
SVC LIQUID mm
VALVE GAS (Inch)
POWER CABLE P*mm
2
CONNECTING CABLE P*mm
2
BREAKER CAPACITY A
1, 208/230, 60 1, 208/230, 60
28,000 48,000
8,206 14,067
2,600 4,500
11.5 20
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LG LG
Rotary Rotary
QJ250KAB/QK145KBD QP325KBD * 2
17,658/10,100 24000
7.7/4.5 10.2
1,635/935 2162
50/45/39/32 57/54/51
56 62
20/16.5/13/6 (706/583/459/212) 35/33/30(1,236/1,165/1,059)
47 (1,660) 104(3,672)
1.84 (65) 3.92(124.2)
2R/30C/18FPI 3R/28C/18FPI
2R/36C/20FPI 2R/26C/21FPI
TURBO FAN TURBO FAN
Propeller Propeller
Thermistor Thermistor
32(70.5) 58(127.9)
66(145.5) 90(198.4)
38(83.8) 66(145.5)
71(156.5) 100(220.5)
570 x 1,820x 310 (22.45 x 71.7 x 12.2) 590 x 1,810 x 440 (23.23 x 71.26 x 17.32)
870 x 808 x 320 (34.3 x 31.8 x 12.6) 900 x 1,225 x 370 (35.43 x 48.23 x 14.57)
9.52(3/8) 9.52(3/8)
15.88(5/8) 19.05(3/4)
3x4.0 3x5.5
4x1.0 4x1.0
30 40
MODEL
LF300CP(LP-C303R20) LF480CE(LP-C483TA0)