LG LS-R126ABG / LS-R126ABL_ABM / LS-R126AHG_AEL / LS-R126BBG_RBG / LS-R126CBG_FBG_FEG / LS-R126CEL_EEL_CEG / LS-R126JEG_JEL / S12LHP Service Manual ▷ View online
Refrigeration Cycle Diagram
-9-
INDOOR UNIT
OUTDOOR UNIT
INDOOR UNIT
OUTDOOR UNIT
HEAT
EXCHANGE
(EVAPORATOR)
EXCHANGE
(EVAPORATOR)
HEAT
EXCHANGE
(EVAPORATOR)
EXCHANGE
(EVAPORATOR)
HEAT
EXCHANGE
(CONDENSER)
EXCHANGE
(CONDENSER)
HEAT
EXCHANGE
(CONDENSER)
EXCHANGE
(CONDENSER)
COMPRESSOR
COMPRESSOR
ACCUMU
LATOR
LATOR
GAS SIDE
GAS SIDE
VALVE
LIQUID SIDE
LIQUID SIDE
VALVE
CAPILLARY TUBE
CAPILLARY TUBE
CHECK VALVE
(Heating Model only)
COOLING
HEATING
REVERSING
VALVE
(Heating Model Only)
VALVE
(Heating Model Only)
(1) Cooling Only Models
(2) Cooling & Heating Models
Wiring Diagram
-10-
(1) Indoor Unit
COMP
C S R
FAN
MOTOR
BR RD BL
BR
BL
BK(RD)
YL
GN/YL
BR
BL
BK
RD
GN/YL
BL
BL
REVERSING
VALVE
RD BL YL
BL
BK(RD)
CAPACITOR
RD
BR
RD
BL
YL
TO INDOOR UNIT
OUTDOOR WIRING DIAGRAM
3854A90001L
TERMINAL
BLOCK
H
C
F
PTC
1(L) 2(N)
3
4
MOTOR
OR
RD
BK
BK
BK
BK
BK
BK
BK
BK
BK
BK
PO
WER
GN/YL
GN/YL
BR(BK/Plained)
BL(WH/Rib
bed)
BK
YL
SH-CAPA
T/BOARD
T-BLOCK
RY-4WAY
RY-FAN
CN-MOTOR
THERMISTOR
STEP
MOTOR
CN-A
CDC1
CN-A
CDC2
CN-TH
CN-U/D
CN-L/R
CN-HVB
CN-12V
CN-DISP
DISPLAY PWB ASM.
P/No : 3854A20238H
CN-CONT
TRIAC
AC PWB ASM.
DC PWB ASM.
CN-TAB
RY-COMP
TO OUTDOOR UNIT
INDOOR WIRING DIAGRAM
4
3
1(L)
BR
BR
BL
BK
RD
GN/YL
2(N)
3
4
FUSE
250V T2A
STEP
MOTOR
H.V.
ASM.
S/W1
S/W2
AIR
CLEAN
(PLASMA)
PO
WER
BR
BR
BL
BK
RD
GN/YL
BL
1(L)
2(N)
34
MOTOR
CN-MOTOR
CN-TAB1
CN-A
C
/DC
CN-A
C
/DC
CN-TH
THERMISTOR
STEP
MOTOR
STEP
MOTOR
H.V.
ASM
RD AIR
CLEAN
(
PLASMA
)
SAFETY S/W1
SAFETY S/W2
BK
BK
BK
BK
BK
BK
BK
CN-U/D
CN-L/R
CN-
CONT
CN-LCD
CN-TELE
DISPLAY PWB ASM
INDOOR WIRING DIAGRAM
3854A20142R
RY-4WAY
RY-FAN
T/BLOCK
TO OUTDOOR UNIT
TRIAC
AC PWB ASM
DC PWB ASM
OR
BK
BR
4
RY-COMP
FUSE
250V T2A
250V T2A
3
YL
SH-CAPA
GN/YL
CN-
DATA
CN-
TEL1
BR
(
BK/Plained
)
GN/YL
BL
(
WH/Rib
bed
)
SUB PWB ASM
PO
WER
BR
BR
BL
BK
RD
GN/YL
BL
1(L)
2(N)
34
MOTOR
CN-MOTOR
CN-TAB1
CN-A
C
/DC
CN-A
C
/DC
CN-TH
THERMISTOR
STEP
MOTOR
STEP
MOTOR
H.V.
ASM
RD AIR
CLEAN
(
PLASMA
)
SAFETY
S/W1
SAFETY
S/W2
BK
BK
BK
BK
BK
BK
BK
BK
BK
BK
BK
BK
BK
CN-U/D
CN-L/R
CN-
CONT
CN-LCD
CN-IOP
DISPLAY PWB ASM
INDOOR WIRING DIAGRAM
3854A20167R
RY-4WAY
RY-FAN
T/BLOCK
TO OUTDOOR UNIT
TRIAC
AC PWB ASM
DC PWB ASM
OR
BK
BR
4
RY-COMP
FUSE
250V T2A
250V T2A
3
YL
SH-CAPA
GN/YL
CN-
DATA
CN-
NET
BR
(
BK/Plained
)
GN/YL
BL
(
WH/Rib
b
ed
)
SUB PWB ASM
(2) Outdoor Unit
MODEL: LS-R126RBG/FBG/FEG/EEL
MODEL: LS-R126JEG/JEL
MODEL: LS-R126ABG/ABM/AHG
LS-R126AEL/BBG/CBG/CEL/CEG
Operation Details
1. MAIN UNIT FUNCTION
• DISPLAY
1) C/O Model
Operation Indicator
• ON while in appliance operation, OFF while in appliance pause.
• Flashing while in disconnection or short in Thermistor. (3 sec off / 0.5 sec on)
• Flashing while in disconnection or short in Thermistor. (3 sec off / 0.5 sec on)
Sleep Timer Indicator
• ON while in sleep timer mode, OFF when sleep timer cancel or appliance operation pause.
Timer Indicator
• ON while in timer mode (on/off), OFF when timer mode is completed or canceled.
Comp. Running Incidator
• While in appliance operation, ON while in outdoor unit compressor running, OFF while in compressor off.
2) H/P Model
Operation Indicator
• ON while in appliance operation, OFF while in appliance pause.
• Flashing while in disconnection or short in Thermistor. (3 sec off / 0.5 sec on)
• Flashing while in disconnection or short in Thermistor. (3 sec off / 0.5 sec on)
Sleep Timer Indicator
• ON while in sleep timer mode, OFF when sleep timer cancel or appliance operation pause.
Timer Indicator
• ON while in timer mode (on/off), OFF when timer mode is completed or canceled.
Defrost Indicator
• OFF except when hot start during heating mode operation or while in defrost control.
■
Cooling Mode Operation
• When the intake air temperature reaches 0.5°C below the setting temp, the compressor and the outdoor fan
stop.
• When it reaches 0.5°C above the setting temp, they start to operate again.
Compressor ON Temp
➲
Setting Temp+0.5°C
Compressor OFF Temp
➲
Setting Temp-0.5°C
• While in compressor running, operating with the airflow speed set by the remote control. While in compressor
not running, operating with the low airflow speed regardless of the setting.
■
Healthy Dehumidification Mode
• When the dehumidification operation input by the remote control is received, the intake air temperature is
detected and the setting temp is automatically set according to the intake air temperature.
26°C
≤
Intake Air Temp
➲
25°C
24°C
≤
Intake Intake Air Temp<26°C
➲
Intake Air Temp-1°C
18°C
≤
Intake Intake Air Temp<24°C
➲
Intake Air Temp-0.5°C
Intake Air Temp<18°C
➲
18°C
-11-
• While in compressor off, the indoor fan repeats low airflow speed and pause.
• While the intake air temp is between compressor on temp. and compressor off temp., 10-min dehumidifica-
• While the intake air temp is between compressor on temp. and compressor off temp., 10-min dehumidifica-
tion operation and 4-min compressor off repeat.
Compressor ON Temp.
➲
Setting Temp+0.5°C
Compressor OFF Temp.
➲
Setting Temp-0.5°C
• In 10-min dehumidification operation, the indoor fan operates with the low airflow speed.
■
Heating Mode Operation
• When the intake air temp reaches +3°…above the setting temp, the compressor is turned off. When below
the setting temp, the compressor is turned on.
Compressor ON Temp.
➲
Setting Temp.
Compressor OFF Temp.
➲
Setting Temp.+3°C
• While in compressor on, the indoor fan is off when the indoor pipe temp. is below 20°C, when above 28°C , it
operates with the low or setting airflow speed. When the indoor pipe temp is between 20°C and 28°C, it oper-
ates with Super-Low(while in sleep mode, with the medium airflow speed).
ates with Super-Low(while in sleep mode, with the medium airflow speed).
• While in compressor off, the indoor fan is off when the indoor pipe temp is below 33°C, when above 35°C , it
operates with the low airflow speed.
• If overloaded while in heating mode operation, in order to prevent the compressor from OLP operation, the
outdoor fan is turned on/off according to the indoor pipe temp.
• While in defrost control, both of the indoor and outdoor fans are turned off.
■
Defrost Control
• While in heating mode operation in order to protect the evaporator pipe of the outdoor unit from freezing,
reversed to cooling cycle to defrost the evaporator pipe of the outdoor unit.
• After 40 min heating mode operation, at 4 min interval, whether to carry out defrost control or not and the time
of defrost control are determined according to the following conditions.
1) While in heating mode operation, the maximum of the indoor pipe temperature is measured and it is com-
pared with the present indoor pipe temperature to get the difference of the indoor pipe temperatures (=the
maximum temperature of indoor pipe ? the present temperature of indoor pipe), according to which, whether
to carry out defrost control or not is determined.
maximum temperature of indoor pipe ? the present temperature of indoor pipe), according to which, whether
to carry out defrost control or not is determined.
2) According to the need of defrost control shown above and the elapsed time of heating mode operation at that
moment, the defrost control time is determined.
3) When the determined time of defrost control is below 7 min, heating mode operation continues without carry-
ing out defrost control. According to the procedure stated above, the determination is made again. When the
defrost control time is 7 min or longer, defrost control is then carried out.
defrost control time is 7 min or longer, defrost control is then carried out.
• While in defrost control, the minimum temp of the indoor pipe is measured and it is compared with the present
temp of the indoor pipe to get the difference of the indoor pipe temperatures (=the present temperature of the
indoor pipe ? the minimum temperature of the indoor pipe). When the difference is 5°C or higher, defrost con-
trol is completed and heating mode operation is carried out.
indoor pipe ? the minimum temperature of the indoor pipe). When the difference is 5°C or higher, defrost con-
trol is completed and heating mode operation is carried out.
• While in defrost control, if the defrost time determined before the start of defrost control is completed, defrost
control stops and heating mode operation is carried out regardless of the above condition.
• When the indoor pipe temp is 42°C or above, defrost control is not carried out even if the condition is one of
the defrost conditions above.
• While in defrost control, the compressor is on and the indoor fan, the outdoor fan, and the 4 way valve are off.
-12-
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