LG LS-J0762YL User manual

MODEL : LS-J0762YL(AC)
LS-L1262YL(AC)
LS-Q096BUL(DC)
LS-R126CUL(DC)
LS-L12632L(AC)
Room Air Conditioner
SERVICE MANUAL
CAUTION
-BEFORE SERVICING THE UNIT, READ THE SAFETY
PRECAUTIONS IN THIS MANUAL.
-ONLY FOR AUTHORIZED SERVICE PERSONNEL.
WEBSITE http://biz.LGservice.com
E-MAIL http://www.LGEservice.com/techsup.html

Contents
Functions.................................................................................................................................3
Product Specification (Cooling & Heating)...........................................................................6
Dimensions..............................................................................................................................7
Refrigeration Cycle Diagram..................................................................................................9
Wiring Diagram......................................................................................................................10
Operation Details ..................................................................................................................11
Installation .............................................................................................................................25
Operation ...............................................................................................................................38
Disassembly of the parts (Indoor Unit)...............................................................................40
2-way, 3-way Valve.................................................................................................................43
Cycle Troubleshooting Guide...............................................................................................50
Self-diagnosis function.........................................................................................................51
Electronic Parts Troubleshooting Guide.............................................................................53
Electronic Control Device.....................................................................................................63
Schematic Diagram...............................................................................................................66
Exploded View and Replacement Parts List.......................................................................69
-2-

Functions
• Room temperature sensor. (Thermistor)
• Pipe temperature sensor. (Thermistor)
• Maintain the room temperature in accordance with the Setting Temp.
• Indoor fan is delayed for 5 sec at the starting.
• Restarting is for approx. 2 minutes.
• Super High, High, Med, Low
--- Lights up in operation
--- Lights up in Sleep Mode
--- Lights up in Timer Mode
--- Lights up in Preheat Mode (for Heating Model)
--- Lights up in Plasma Air Clean Mode
• Intermittent Operation of fan at low speed or off.
• The fan is switched to low(Cooling), low(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 the 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
during defrosting.
• The indoor fan stops until the
evaporator pipe temperature will be
reached at 34°C.
Sleep Mode Auto Control
Natural Air Control by CHAOS Logic
Airflow Direction Control
PLASMA
-3-
Defrost(Deice) control (Heating)
Hot-start Control (Heating)
• The function will be operated while in any
operation mode with selecting the function.
• The function is to be stopped while it is
operating with selecting the function.
PLASMA

-4-
• If power is on, it will operate to chage capacitor on controller and power relay will operate after about
2~5sec.
• If outdoor temp. is below 0°C, preheater is operating for 1~5min.
• At the initial, It will be operated compressor after 1min. for preheating.
• The active power filter is designed to correct power factor(cos θ) and to regulate DC link voltage.
• It will be operated PFC circuit when the compressor freq. is over 30Hz and wattage is over 450 watt.
• The final operating freq. of comp. is set the lowest freq. that limited outdoor temp., discharge pipe temp.,
heat-sink temp., target freq., owing to CT.
• When the temp. of power module increases to 85°C, controller decreases Freq. of Comp.
• It will be changed the drive freq. of comp. according to temp. of indoor and outdoor.
• It will be changed the drive voltage of comp. according to operating frequency.
• It is only operated in the heating operation mode except defrosting operation.
• High speed
- Although fan motor speed is middle, it will change high speed in case of below AC193V, over 45°C of
outdoor temp., and over fc, fh of comp. Freq.
• Middle speed
- Nomal mode
• Low speed
- Although fan motor speed is middle, it will change Low speed in case of over AC 270V, over 21°C
(Heating Mode) of outdoor temp. below 24°C (Cooling Mode) of outdoor temp.
Outdoor Unit
Power relay control
Stand by control at low temp.
Active power filter control(PSC)
Comp. Freq. control
Overheatng. Protection(Power module)
Freq. speed control(up/down speed)
V/F control
Total current control (over current protection)
DC peak current control
4 way valve control
Outdoor fan motor control
Discharge pipe temp. control

-5-
Healthy Dehumidification Operation Mode. ( )
Remote Control
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.( )
Horizontal Airflow Direction Control Button(Optional)
Room, Temperature Display
Setting the Time or Timer
PLASMA(Optional)
ON OFF
SET
PLASMA
CANCEL
Fan Speed Selection
(Low) (Med) (High) (CHAOS)
Power Save Cooling Button
: (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
: Used to set Preheat mode.
Cooling Down to 18°C
Up to 30°CHeating Down to 16°C Up to 30°C

7K Series(AC) 12K Series(AC) 9K Series(DC) 12K Series(DC)
at 230V
7,000(4,700-8,300) 12,000(6,500-13,200) 9,000(3,700-9,700) 12,000(3,750-13,700)
9,000(5,000-10,000) 14,400(6,500-15,900) 11,250(1,750-12,500) 14,400(2,450-15,900)
1
1Ø, 220-240V, 50Hz
5.6 9 7.2 9
25 31 31 31
33 36 36 39
48 49 49 49
770 1,330 879 1,050
920 1,580 1,125 1,440
3.5 5.9 4 4.5
4.1 7 5 6.5
7.5 8.7 8.4 14.4
35.8 29 29 29
802*262*165 888*287*170 824*260*165 900*285*156
575*525*260 770*540*245 770*540*245 770*540*245
7 9.5 7 9.5
27 38 34 38
580(R22) 950(R22) 620(R410A) 950(R410A)
Up & Down Up & Down Up & Down Up & Down, Right & Left
L.C.D Wireless
1/4(6.35)
3/8(9.52) 1/2(12.7) 3/8(9.52) 3/8(9.52)
O
O
1 1.5 1 1.5
1 1.5 1 1.5
Cooling Capacity Btu/h
Heating Capacity
Moisture Removal l/h
Power Source Ø, V, Hz
Air Circulation Indoor m3/min
Outdoor
Noise Level Indoor dB (A)±3
Outdoor
Input Cooling W
Heating
Running Cooling A
Current Heating
Motor Output Indoor W
Outdoor
Dimensions Indoor mm
(W x H x D) Outdoor
Net. Weight Indoor kg
Outdoor
Refrigerant (R22) g
Airflow Direction Control (Up & Down)
Remocon Type
Service Valve Liquid inch(mm)
Gas
Sleeping Operation
Drain Hose
Connecting Cable mm2
Power Cord mm2
-6-
Product Specifications (Cooling & Heating)
Model Name
Item Unit

-7-
Dimensions
(1) Indoor Unit
Tubing hole cover
D
H
W
Installation plate
Tubing hole cover
Installation plate
Right rear piping
Left rear piping
ø70mm ø70mm
50mm
20mm
20mm
80mm
ø70mm
A
A
AACenter
Right rear pipingLeft rear piping
Center
ø70mm
MODEL
DIM Unit
W mm 820 888 824 900
H mm 262 287 260 285
D mm 165 170 165 156
7k Btu Series(AC) 12k Btu Series(AC) 9k Btu Series(DC) 12k Btu Series(DC)
(7k, 12k)
( 7k) ( 12k )
( 7k ) ( 12k )

-8-
(2) Outdoor Unit
WL2
L3
L1
D
H
L4
L5
Gas side
(3-way valve)
Liquid side
(2-way valve)
MODEL
7K Btu Series(AC) 12K Btu Series(AC) 9K Btu Series(DC) 12K Btu Series(DC)
DIM unit
W mm 564 770 770 770
H mm 525 540 540 540
D mm 265 245 245 245
L1 mm 294 287 287 287
L2 mm 66 64 64 64
L3 mm 374 518 518 518
L4 mm 17 10 10 10
L5 mm 270 100 100 100

Pipe size(Diameter:Ø)MAX. Max
MODEL Piping length Elevation
Gas(inch) Liquid(inch) (m) (m)
7k Btu Series(AC) 3/8" 1/4" 15 7
12k Btu Series(AC) 1/2" 1/4" 15 7
9k Btu Series(AC) 3/8" 1/4" 15 7
12k Btu Series(AC) 3/8" 1/4" 15 7
Refrigeration Cycle Diagram
-9-
INDOOR UNIT OUTDOOR UNIT
HEAT
EXCHANGE
(EVAPORATOR)
HEAT
EXCHANGE
(CONDENSER)
COMPRESSOR
ACCUMU
LATOR
GAS SIDE
3-WAY VALVE
LIQUID SIDE
2-WAY VALVE
CAPILLARY TUBE
COOLING
HEATING
REVERSING
VALVE
(Heating Model Only)

Wiring Diagram
-10-
(1) Indoor Unit
Model: LS-_YL/UL Series Model: LS-_NM/NN Series
Model: LS-L12632L
(2) Outdoor Unit
Model: LS-L12632L
CN-COIL2
CN-COIL1
REACTOR
CN-COMP CN-FAN
WCN-NOISE1
TERMINAL
BLOCK
CN-4WAY
RY-
4WAY
BR
BL
GN/YL
RD
RD BL BR
BR
BL
FUSE
AC 250V/15A
GN/YL
RD
4WAY
VALVE
1(L)
2(N)
3
TO
INDOOR
UNIT
MAIN PWB ASM
OUTDOOR WIRING DIAGRAM
3854A20157L
YL
YL
COMP-
RESSOR
YL
W(C)V(S)U(R)
BL RD
YL BL RD
SSR
COMPRESSOR
THERMISTOR
HEAT SINK
THERMISTOR INTAKE/PIPE THERMISTOR
CN-TH2 CN-TH1
WH
BK
BK BK
GR
RD BL YL
FAN
MOTOR
CN-COIL2
CN-COIL1
REACTOR
CN-COMP CN-FAN
WCN-NOISE1
TERMINAL
BLOCK
CN-4WAY
RY-
4WAY
BR
BL
GN/YL
RD
RD BL BR
BR
BL
FUSE
AC 250V/15A
GN/YL
RD
4WAY
VALVE
1(L)
2(N)
3
TO
INDOOR
UNIT
MAIN PWB ASM
OUTDOOR WIRING DIAGRAM
3854A20051V
YL
YL
COMP-
RESSOR
YL
W(C)V(R)U(S)
BL RD
YL BL RD
SSR
COMPRESSOR
THERMISTOR
HEAT SINK
THERMISTOR INTAKE/PIPE THERMISTOR
CN-TH2 CN-TH1
WH
BK
BK BK
GR
YL BL RD
FAN
MOTOR
POWER
BR
BR BL RD GN/YL
BL
1(L) 2(N)
3
MOTOR
CN-MOTOR
CN-TAB1
CN-AC/DC CN-AC/DC
STEP
MOTOR
STEP
MOTOR
H.V.
ASM
RD
AIR
CLEAN
(
PLASMA
)
SAFETY S/W1
SAFETY S/W2
BK
BK
BK
BK
BK
CN-U/D
CN-L/R
CN-DISP1
DISPLAY PWB ASM
INDOOR WIRING DIAGRAM 3854A20142G
SW(FORCE)
T/BLOCK
TO OUTDOOR UNIT
SSR
AC PWB ASM DC PWB ASM
OR
BK
BR
4
RY-POWER
FUSE AC
250V T2A
3
YL
SH-CAPA
GN/YL
CN-DISP2
BR
BL
CN-TH
THERMISTOR
POWER
BR
BR BL RD GN/YL
BL
1(L) 2(N)
3
MOTOR
CN-MOTOR
CN-TAB1
CN-AC/DC CN-AC/DC
STEP
MOTOR
STEP
MOTOR
H.V.
ASM
RD
AIR
CLEAN
(
PLASMA
)
SAFETY S/W1
SAFETY S/W2
BK
BK
BK
BK
BK
CN-U/D
CN-L/R
CN-DISP1
DISPLAY PWB ASM
INDOOR WIRING DIAGRAM 3854A20142V
SW(FORCE)
T/BLOCK
TO OUTDOOR UNIT
SSR
AC PWB ASM DC PWB ASM
OR
BK
BR
4
RY-POWER
FUSE AC
250V T2A
3
YL
SH-CAPA
GN/YL
BR
BL
CN-TH
THERMISTOR
POWER
BR
BR BL RD GN/YL
BL
1(L) 2(N)
3
MOTOR
CN-MOTOR
CN-TAB1
CN-AC/DC CN-AC/DC
STEP
MOTOR
STEP
MOTOR
H.V.
ASM
RD
AIR
CLEAN
(PLASMA)
SAFETY S/W1
BK
BK
BK
CN-U/D
CN-L/R
CN-DISP1
DISPLAY PWB ASM
INDOOR WIRING DIAGRAM 3854A20305B
SW(FORCE)
T/BLOCK
TO OUTDOOR UNIT
SSR
AC PWB ASM DC PWB ASM
OR
BK
BR
4
RY-POWER
FUSE AC
250V T2A
3
YL
SH-CAPA
GN/YL
CN-DISP2
BR
BL
CN-TH
THERMISTOR