LG LB-F4280HL / LB-F4280CL Service Manual ▷ View online
–8–
■
LB-F4280CL
(
■
Rated performance for refrigerant line length of: 5m)
For installation over rated distance, 70g of refrigerant should be added for each meter.
ex) When installed at a distance of 15m, 700g of refrigerant should be added.
(15-5) x 70g = 700g
Pipe size(Diameter: ø)
Piping length(m)
Elevation(m)
MODEL
Gas
Liquid
Rated
Max.
Rated
Max.
LB-F4280CL
3/4"
3/8"
5
30
5
30
INDOOR UNIT
OUTDOOR UNIT
HEAT
EXCHANGER
(CONDENSER)
EXCHANGER
(CONDENSER)
HEAT
EXCHANGER
(CONDENSER)
EXCHANGER
(CONDENSER)
COMPRESSOR
GAS SIDE
LIQUID SIDE
CAPILLARY TUBE
Wiring Diagram
■
Model: LB-F4280HL
(1) Indoor Unit
(2) Outdoor Unit
–9–
2
6
4
FMi
TRANS
WH
BL
BK
GN/YL
GN/YL
RD
OR
CN-TRANS2
PWB ASM
CN-POWER
CN-TRANS1
Hi Med Low
CN-MOTOR
R
Y
-F
AN
R
Y
-4W
A
Y
R
Y
-COMP
CN-OUT
1
3
6
1
3
5
2
4
DC-12V
SIGNAL
GND
Re
CN-REMO
INDOOR ELECTRIC CIRCUIT
INDOOR UNIT
OUTDOOR UNIT
( RD
)
( YL
)
( BR
)
P/NO : 3854A20025Z
COi
GN/YL
CN-TH
EVA
TH
ROOM
TH
R S T N
POWER SUPPLY
WH
WH
BK
BK
BK
BK
BK
Deice PCB
TNS
NO
NC
C TH
FUSE
(250V 5A)
FUSE
(250V 5A)
RD
OR
WH
WH
WH
HIGH PRESSURE S/W
BK
WH
OR
BK
BK
YL
COMP.
BK
OR
WH
BK
RD
WH
WH
T/B2
POWER
RELAY
1
2
3
4
5
6
7
8
T/B1
RD
BK
YL
WH
BK
REVERSING
VALVE
BL
BL
T3
T2
T1
YL BK
OR
FAN
MOTOR
FAN
MOTOR
CAPACITOR
CAPACITOR
POWER
RELAY
RELAY
1
3
5 31
2
4
6 32
A
B
NOTE
BL : BLUE
BK : BLACK
BR : BROWN
OR : ORANGE GN/YL : GREEN/YELLOW
BK : BLACK
BR : BROWN
OR : ORANGE GN/YL : GREEN/YELLOW
RD : RED
WH : WHITE
YL : YELLOW
WH : WHITE
YL : YELLOW
Outdoor Unit Wiring Diagram
R
TERMINAL
BLOCK
BLOCK
POWER SUPPLY
POWER
RELAY
S T N
BK
BK
BK
WH
WH
WH
RD
OR
BK
HIGH PRESSURE S/W
WH
Deice PCB
C TH
TNS
NO
NC
WH
OR
BK
POWER
RELAY
1
2
3
4
5
6
31
T/B1
T/B2
32
B
A
FAN
MOTOR
FAN
MOTOR
YL BK
OR
BK
T3
T2
T1
RD
WH
COMP.
1
2
3
4
5
6
7
8
YL BK
OR
BK
BK
BL
BL
BK
WH
CAPACITOR
CAPACITOR
REVERSING
VALVE
BR
BL
BR
BL
GN/YL
GN/YL
TERMINAL BLOCK
To the indoor unit
1
2
3
4
5
5
6
BK
WH
WH
YL
BK
RD
Fuse
(250V 5A)
Fuse
(250V 5A)
P/NO : 3854AP2685Y
■
Model: LB-F4280CL
(1) Indoor Unit
(2) Outdoor Unit
–10–
2
E
FMi
TRANS
WH
BL
BK
GN/YL
GN/YL
OR
CN-TRANS2
PWB ASM
CN-POWER
CN-TRANS1
Hi Med Low
CN-MOTOR
R
Y
-F
AN
R
Y
-4W
A
Y
R
Y
-COMP
1
3
E
DC-12V
SIGNAL
GND
Re
CN-REMO
INDOOR ELECTRIC CIRCUIT
INDOOR UNIT
OUTDOOR UNIT
( RD
)
( YL
)
( BR
)
P/NO : 3854A90021N
3
1
2
COi
GN/YL
CN-TH
EVA
TH
ROOM
TH1
F1
F1
R
TM
3Ø, 380-415V, 50Hz
POWER SUPPLY
S T N
BK
BK
BK
WH
RD
WH
52C
1
2
3
4
5
6
31
32
B
A
FMo
49FMo
FMo
49FMo
BK
GN/YL
T3
T2
T1
RD
WH
CM
YL
BK
OR
BL
WH
WH
Co
Co
YL
OR
BK
BR
BK
BR
CN-OUT
NOTE
BL : BLUE
BK : BLACK
OR : ORANGE
GN/YL : GREEN/YELLOW
RD : RED
WH : WHITE
YL : YELLOW
WH : WHITE
YL : YELLOW
Outdoor Unit Wiring Diagram
BK
WH
BL
GN/YL
GN/YL
TMo
T
o the indoor unit
1
2
3
4
5
5
6
52C
TM
F1
CM
MAGNECTIC CONTACTOR
MAIN TERMINAL BLOCK
FUSE (250V,10A)
COMPRESSOR
Co
FMo
TMo
RUN CAPACITOR FOR FMo
OUTDOOR FAN MOTOR
TERMINAL BLOCK
P/NO : 3854A90008Z
F1
F1
R
TM
3Ø, 380-415V, 50Hz
POWER SUPPLY
S T N
BK
BK
WH
RD
WH
WH
52C
1
2
3
4
5
6
31
32
B
A
FMo
49FMo
FMo
49FMo
BK
GN/YL
T3
T2
T1
RD
WH
BK
BL
WH
WH
CM
YL
BK
OR
Co
Co
YL
OR
BK
BR
BK
OR
OR
BR
–11–
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)
• 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. 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.
3. 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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