LG LM-4460C2T Service Manual ▷ View online
Refrigeration Cycle Diagram
(
§
Rated performance for refrigerant line length of: 7.5m)
For installation over rated distance, 50g of refrigerant should be added for each meter.
ex) When installed at a distance of 15m, 375g of refrigerant should be added.
(15-7.5) x 50g = 375g
Pipe size(Diameter: ø)
Piping length(m)
Elevation(m)
Gas
Liquid
Rated
Max.
Rated
Max.
5/8"
3/8"
7.5
20
7.5
15
–7–
INDOOR A-UNIT
INDOOR B-UNIT
OUTDOOR UNIT
HEAT
EXCHANGER
EXCHANGER
HEAT
EXCHANGER
EXCHANGER
A-COMPRESSOR
GAS SIDE
LIQUID SIDE
COOLING
HEATING
A-REVERSING
VALVE
VALVE
A-CHECK VALVE
CAPILLARY TUBE
CAPILLARY TUBE
HEAT
EXCHANGER
EXCHANGER
HEAT
EXCHANGER
EXCHANGER
B-COMPRESSOR
GAS SIDE
LIQUID SIDE
B-REVERSING
VALVE
VALVE
B-CHECK VALVE
CAPILLARY TUBE
CAPILLARY TUBE
Wiring Diagram
LM-4460H2T
• Indoor Unit
• Outdoor Unit
–8–
12V
3(N) 4(L)
1(N)2(L) 7
AC PCB
DC PCB
D/PUMP
LOUVER
COMP.
4WAY
HIGH
MED
LOW
INDOOR WIRING DIAGRAM
FLOAT S/W
REMOCON
TEMP.SENSOR
PIPE SENSOR
BL
BK
BL
BK
BL
FAN
MOTOR
LOUVER
MOTOR
PUMP
WATER
TO OUTDOOR
BR
RD
BL
LOUVER S/W
GN/YL
POWER TRANS
GN/YL
GN/YL
S
C
R
B-MOTOR
A-MOTOR
B-COMP
A-COMP
OR
Capacitor
OR
YL
S
C
R
OR
BL
Capacitor
Capacitor
OR
BK
YL
BK
BK
BK
WH
BL
WH
BR
TB1
TB4
TB5
TB2
TB6
TB3
WH
WH
BK
BK
BK
BK
BK
WH
BK
BK
BR
BK
YL
RD
BL
GN/YL
OUTDOOR
FAN
POWER INPUT
CN-COMP
CN-FAN
CN-SV
CN-COM
CN-POWER
CN-TH1
CN-TRAMS
A-INDOOR
B-INDOOR
1
2
5
6
3(N)
3(N)
4(L)
4(L)
BK
BK
REVERSING
A-COIL
MOTOR
RELAY
RELAY
B-COMP
POWER
RELAY
POWER
RELAY
A-COMP
POWER
RELAY
POWER
RELAY
POWER
TRANS
TRANS
1
2
3
4
5
6
7
8
REVERSING
B-COIL
A-THERMISTOR
B-THERMISTOR
P/No: 3854A30042B
YL
S
C
R
BL
WH
BK
S
C
R
BR
Capacitor
BR
RD
BK
WH
8
1
0
6
4
2
8
1
0
6
4
2
3854A90002T
–9–
LM-4460C2T
• Indoor Unit
• Outdoor Unit
3854A30086A
12V
3(N) 4(L)
5
6
7
AC PCB
DC PCB
D/
PU
M
P
LO
UV
ER
C
O
M
P
.
FU
SE
(2
50
V,
5
A)
H
IG
H
M
E
D
LO
W
INDOOR WIRING DIAGRAM
FLOAT S/W
REMOCON
TE
M
P.
SE
N
SO
R
PI
PE
S
EN
SO
R
BL
BK
BL
BK
BK
FAN
MOTOR
LOUVER
MOTOR
PUMP
WATER
TO OUTDOOR
WH
RD
LOUVER S/W
POWER TRANS
GN/YL
GN/YL
GN/YL
8
1
0
6
4
2
8
1
0
6
4
2
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
P/No: 3854A30042Q
RD
S
C
R
A-COMP
RELAY
B-COMP
RELAY
A-MOTOR
RELAY
B-MOTOR
RELAY
BK
WH
YL
YL
BR
BR
BR
BR
RD
YL
YL
YL
YL
BL
BL
BK
OR
OR
BK
OR OR
OR
BK
WH
YL
BK
BK
YL
BK
WH
WH
BK
BK
BK
BL
BL
BL
BL
BK
YL
WH
RD
TB7
N
(
1
)
POWER INPUT
OUTDOOR
FAN
DIAGRAM WIRING
A-INDOOR
TB5
TB8
TB6
B-INDOOR
E
(
0
)
L
(
2
)
3
(
N
)
4
(
L
)
5
(
A
)
3
(
N
)
4
(
L
)
5
(
B
)
TB4
A-COMP
S
C
R
S
C
R
TB3
TB2
TB1
B-COMP
A-MOTOR
S
C
R
B-MOTOR
–10–
Operation Details
(1) The function of main control
1. Time Delay Safety Control
• 3min...
The compressor is ceased for 3minutes to balance the pressure in the refrigeration cycle.
(Protection of compressor)
• 5sec...
Vertical air flow direction control louvers open in 5 seconds to prevent noise between louvers and wind.
• 30sec... The 4-way valve is ceased for 30sec. to prevent the refrigerant-gas abnormal noise when the Heating
operation is OFF or switched to the other operation mode while compress is off.
While compressor is running, it takes 3~5 seconds to switch.
2. Auto Swing Control
• This function is to swing the louver up and down automatically.
3. Air-Filter Checking Control
• 'Filter' will display in the remote controller display when an air-filter is polluted. Then clean the air-filter for refer-
ence to Owners Manual.
4. Soft-Dry Operation
• The indoor fan speed is automatically set to the low, so the shift of the indoor fan speed is impossible because of
already being set to the best speed for Dry Operation by Micom Control.
5. Cooling Mode Operation
• When selecting the Cooling( ) Mode Operation, the unit will operate according to the setting by the remote con-
troller and the operation diagram is as following
Intake Air temp.
COMP. ON
(SET TEMP.+0.5°C)
(SET TEMP.+0.5°C)
COMP. OFF
(SET TEMP. -0.5°C)
(SET TEMP. -0.5°C)
More than
More than
3 minutes
3 minutes
Selecting
Selecting
Selecting
fan speed
fan speed
fan speed
COMPRESSOR
ON
OFF
ON
OFF
ON
INDOOR FAN
Low Low
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