LG LS300CE User manual

SERVICE MANUAL
Room Air Conditioner
CAUTION
-BEFORE SERVICING THE UNIT, READ THE SAFETY
PRECAUTIONS IN THIS MANUAL.
-ONLY FOR AUTHORIZED SERVICE PERSONNEL.
MODEL : LS300CE
WEBSITE http://biz.LGservice.com

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Contents
Details of LG Model Name (2004) ..........................................................................................3
Functions.................................................................................................................................4
Product Specifications ..........................................................................................................6
Dimensions..............................................................................................................................7
Refrigeration Cycle Diagram..................................................................................................9
Pipe Length and the Elevation.............................................................................................10
Wiring Diagram......................................................................................................................11
Operation Details ..................................................................................................................13
Display Function ...................................................................................................................20
Self-diagnosis Function........................................................................................................20
Installation .............................................................................................................................21
Operation ...............................................................................................................................37
Disassembly of the parts (Indoor Unit)...............................................................................39
3-way Valve............................................................................................................................43
Cycle Troubleshooting Guide...............................................................................................48
Electronic Parts Troubleshooting Guide.............................................................................49
Electronic Control Device.....................................................................................................55
Schematic Diagram...............................................................................................................58
Exploded View and Replacement Parts List.......................................................................60

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Details of LG Model Name(2004)
12 -345678910
Code Type Code of Model Meaning
1 Producing Center, A~Z L: Chang-won R22 N: India
Refrigerant A: Chang-won R410A Z: Brazil
C: Chang-won R407C D: Indonesia
T: China M: Mexico
K: Turkey R22 V: Vietnam
E: Turkey R410A S: Out Sourcing
H: Thailand
2 Product Type A~Z S: Split Type Air Conditioner
3 Cooling/Heating/Inverter A~Z C: Cooling only
H: Heat pump
X: C/O + E/Heater
Z: H/P + E/Heater
V: AC Inverter C/O
N: AC Inverter H/P
Q: DC Inverter C/O
W: DC Inverter H/P
4, 5 Capacity 0~9 Cooling/Heating Capacity
Ex. "09" →9,000 Btu/h
6 Electric Range 1~9 1: 115V/60Hz, A: 220V, 50Hz, 3Phase
A~Z 2: 220V/60Hz B: 208~230V, 60Hz, 3Phase
3: 208-230V/60Hz C: 575V, 50Hz, 3Phase
5: 200-220V/50Hz D: 440~460, 60Hz, 3Phase
6: 220-240V/50Hz E: 265V, 60Hz
7: 110V, 50/60Hz F: 200V, 50/60Hz
8: 380-415V/50Hz
9: 380-415V/60Hz
7 Chassis A~Z Name of Chassis of Unit
Ex. LSP →SP Chassis
8 Look A~Z Look,
Color (Artcool Model)
9 Function A~Z
10 Serial No. 1~9 LG Model De
* ARTCOOL COLOR
velopment Serial No.
Basic A
Basic+4Way B
Plasma Filter C
Plasma Filter+4 Way D
Tele+LCD E
Tele+LCD+Nano plasma+4Way F
Nano Plasma F+(A/changeove)+A/clean+Low A G
Nano Plasma F+(A/changeove)+A/clean+4way+Low A H
Tele+LED+4way I
Internet J
Plasma F+4Way+Oxy generator K
Nano Plasma F+(A/changeove)+A/clean L
Nano Plasma F+(A/changeove)+A/clean+4way M
Nano Plasma F+(A/changeove)+A/clean+PTC N
Nano Plasma F+(A/changeove)+Autoclean+4way+PTC P
Nano Plasma F+(A/changeove)+A/clean+4way+Low A+PTC Q
Negative ION+A/Clean R
(Nano)Plasma+Negative ION+A/Clean S
4way+(Nano)Plasma F+Negative ION+Healthy dehumidification+A/Clean T
Nano Plasma F+4Way+(A/changeove)+A/clean+ U
R Mirror
W White
B Blue
D Wood
M Metal
C Cherry

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Functions
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)
Healthy Dehumidification Mode
Sleep Mode Auto Control
Auto Air Control by the unit electronic control
Chaos Swing
Defrost control(Heating)
Hot-start Control (Heating)
• Room temperature sensor (THERMISTOR)
• Maintains the room temperature in accordance with the Setting Temp.
• Indoor fan is delayed for 5 seconds at the starting.
• Restarting is inhibited for approx. 3 minutes.
• High, Med, Low and Auto
• Intermittent operation of fan at low speed
• Both the indoor and outdoor fan stops
during defrosting.
•Hot start will be operated after
defrosting ends.
• The indoor fan stops until the
indoor pipe temperature will be
reached at 28°C(82°F).
• 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.
--- Lights up in operation
--- Lights up in Sleep Mode
--- Lights up in Timer Mode
--- Lights up in Defrost Mode or Hot Start Mode (only Heating Model)
--- Lights up during compressor running (only Cooling Model)
OUT
DOOR

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Healthy Dehumidification Operation Mode. ( )
Remote Controller
Operation ON/OFF
Reset
Operation Mode Selection
Temperature Setting
Timer Selection
Timer Setting
JET COOL
Timer Cancel
Sleep Operation
Airflow Direction Control
(Cooling
model only) (Heating
model only)
TEMPERATURE LOW HIGH
Cooling Operation Mode.( ) Heating Operation Mode.( ) Auto Operation Mode.( )
Fan Operation Mode
Horizontal Airflow Direction Control Button(Option)
Room, Temperature Display
Setting the Time or Timer
ON OFF
SET
CANCEL
Fan Speed Selection
(Low) (Med) (High) (CHAOS)
: (High:39°C Low:11°C)
: OFF, ON, OFF ON
: Cancel Sleep Mode, Timer ON or Timer OFF
: 1, 2, 3, 4, 5, 6, 7, Off Timer
: Fan Operates without cooling or heating.
Cooling Down to 18°C
Up to 30°CHeating Down to 16°C Up to 30°C

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Product Specifications(Cooling Only)
* Design and Specifications subject to change without prior notice for product improvement.
Items Unit LS300CE
Power Supply ø, V, Hz 1, 208/230, 60
Cooling Capacity BTU/h 27,000/28,000
Input W 3,450/3,600
Running Current A 16.5/16.0
COMP. Locked Rotor AMP. A A: 68. B: 29
E.E.R BTU/hW 7.79/7.81
Air Circulation m3/min(cfm) 21(740)
Moisture Removal l/h(pts/hr) 3.7(7.8)
Noise Level Indoor, High dB(A) 49
(Sound Med dB(A) 46
Pressure, 1m) Low dB(A) 43
Outdoor, Max dB(A) 63
Features Temperature Control Thermistor
Air Deflection 4-way
Steps, Fan/Cool 3/3
Airflow Direction Control(up&down) Auto
Airflow Direction Control(left&right) Manual
Remocon Type Wireless LCD
Setting Temperature Range, Cooling Mode 64~86°F
Temperature Increment 2°F
Auto Operation(electronic control) Yes
Self Diagnosis Yes
Timer 24hr, On/Of
Sleep Operation Yes
Healthy Dehumidification Mode Yes
Restart Delay minutes 3
Refrigerant(R-22) Charge g(oz) 2300(81)
Power cord AWG #: P*mm2 12:3*2.5
Fuse or breaker Capacity A 30A
Connecting Cable AWG #: P*mm220:4*0.75
Connecting Tube Liquid Side mm(in) 9.52(1/4)
(ø. Socket Flare) Gas Side mm(in) 15.88(1/2)
Length, std m(ft) 7.5(24.6)
Additional Drain Hose(Outer Dia.) mm(in) 15.5(5/8)
Dimensions Indoor mm 1259*349*205
(WxHxD) in 49.6*13.7*8.1
Outdoor mm 870*800*320
in 34.3*31.5*12.6
Net Weight Indoor kg(lbs) 20
Outdoor kg(lbs) 71

(1) Indoor Unit
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Dimensions
W
H
Tubing hole cover
Tubing hole cover
Installation plate
D
Wmm(inch) 1,259(49.6)
Hmm(inch) 349(13.7)
Dmm(inch) 205(8.1)
Model
Dimension
30K SERIES

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MODEL
DIM
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W
L7 L6 L8 L9
D
L1
L2
L3
L10L11
L4L5
H
Gas side
3-way valve
Liquid side
3-way valve
W mm(in ch) 870(34.3)
H mm(in ch) 800(31.5)
D mm(in ch) 320(12.6)
L1 mm(in ch) 370(14.6)
L2 mm(in ch) 340(13.4)
L3 mm(in ch) 25(1.0)
L4 mm(in ch) 775(30.5)
L5 mm(in ch) 25(1.0)
L6 mm(in ch) 546(21.5)
L7 mm(in ch) 162(6.4)
L8 mm(in ch) 162(6.4)
L9 mm(in ch) 54(2.1)
L10 mm(in ch) 74.5(2.9)
L11 mm(in ch) 79(3.1)
30K SERIES
(2) Outdoor Unit

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Refrigeration Cycle Diagram
INDOOR UNIT OUTDOOR UNIT
INDOOR UNIT OUTDOOR UNIT
HEAT
EXCHANGER
(EVAPORATOR)
HEAT
EXCHANGER
(EVAPORATOR)
HEAT
EXCHANGER
(CONDENSER)
HEAT
EXCHANGER
(CONDENSER)
COMPRESSOR
COMPRESSOR
ACCUMU
LATOR
Suction Line
Suction Line
3-WAY VALVE
Evaporator Line
Evaporator Line
3-WAY VALVE
CAPILLARY TUBE
CAPILLARY TUBE
CHECK VALVE
(Heating Model only)
COOLING
HEATING
REVERSING
VALVE
(Heating Model Only)
(1) Cooling Only Models
(2) Cooling & Heating Models

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Pipe length and the elevation
* Capicity is based on standard length and maximum allowance length is the basis of
reliability.
* Oil trap should be installed per 5~7 meters(16.4~23.0ft).
CAUTION
Outdoor unit
Indoor unit
A
B
A
Oil trap
Outdoor unit
Indoor unit B
In case more than 5m (16.4ft)
30k 5/8" 3/8" 7.5(25) 15(50) 30(100) 30(0.32)
(50Hz, 60Hz)
Pipe Size
Capacity
(Btu/h) GAS LIQUID
Additional
Refrigerant
g/m(oz/ft)
Max.
Length
A m(ft)
Max.
Elevation
B m(ft)
Standard
Length
m(ft)