LG LB-D1861 / LB-D2461 / LB-F3061 / LB-F3661 / LB-F3681 / LB-F4261 / LB-E4881 / LB-E6081 / LB-E6084_HL_CL_HP_CP Service Manual ▷ View online
–17–
COOLING ONLY
Model : LB-F3681CL/CP
HEAT PUMP
Model : LB-F4261HL/HP
OUTDOOR WIRING DIAGRAM
INDOOR WIRING DIAGRAM
3854AP2778F
INDOOR
MOTOR
DRAIN
PUMP
BR
BR
BL
RD
BK
GN/YL
YL
OR
RD
BL
BL
BL
BK
GN/YL
COMP
4 WAY
FUSE
250V10A
ROOM.
THERMISTOR
PIPE
THERMISTOR
FLOAT S/W
REMOTE
CONTROL
ZONE
CONTROL
OPTIONAL
EXTRA
EXTRA
TERMINAL
BLOCK
TO OUTDOOR UNIT
3854A20031X
3(L)
4(N)
5
6
7
CM
1
2
3
4
5
6
2
3
4
5
6
220-240V
1ø,50Hz
POWER SUPPLY
L
N
1
2
3
4
5
6
31
32
B
A
WH
BR
BR
RD
BK
YL YL
YL
FMo
1
49FMo
FMo
2
49FMo
Co
TM
52C
63H2
Co
BK YL
BK
OR
OR
RD
BK
BK
RD
Cr
CH
S
R
C
WH
WH
WH
BK
BK
BK
WH
WH
WH
BL
YL
BK
RD
RD
To the indoor unit
52F1
BL
WH
PTCR
GN/YL
GN/YL
Tmo
1
2
3
4
5
6
7
8
F1
T/B1
T/B2
BK
BK
BK
BR
BK
BR
OR
BK
D.P
TNS
NO
NC
C TH
WH
WH
BK
WH
BL
RD
GN/YL
20SV
OUTDOOR WIRING DIAGRAM
INDOOR WIRING DIAGRAM
1
TM
3ø, 380V, 50Hz
POWER SUPPLY
BK
52C
1
3
5
31
2
4
6
32
B
A
BK
WH
WH
BK
WH
BL
GN/YL
T/B
F1
BK
WH
RD
WH
BK
RD
WH
T1
T3
T2
Co
OR
YL
Co
OR
FMo
1
3854A90010Y
FMo
2
CM
YL
BK
BK
BR
BL
BK
BK
BK
WH
GN/YL
TMo
T
o
the indoor unit
WH
WH
2 3 4
R S T N
1
2
3
4
5
5
6
INDOOR
MOTOR
DRAIN
PUMP
BR
BR
YL
OR
RD
BL
BL
RD
BL
BL
BK
GN/YL
GN/YL
COMP
FUSE
250V10A
TEMP.
THERMISTOR
PIPE
THERMISTOR
FLOAT S/W
REMOTE
CONTROL
ZONE
CONTROL
OPTION
TERMINAL
BLOCK
1
(
L
)
2
(
N
)
4
3
5
TO OUTDOOR UNIT
3854A20031Y
HEAT PUMP
Model : LB-E4881HL/HP, LB-E6081HL/HP
Model : LB-E6084HL
COOLING ONLY
Model : LB-4881CL/CP, LB-E6081CL/CP
–18–
OUTDOOR WIRING DIAGRAM
INDOOR 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)
INDOOR
MOTOR
DRAIN
PUMP
BR
BR
YL
OR
RD
BL
BL
RD
BK
BL
BL
BK
GN/YL
GN/YL
COMP
4 WAY
FUSE
250V10A
TEMP.
THERMISTOR
PIPE
THERMISTOR
FLOAT S/W
REMOTE
CONTROL
ZONE
CONTROL
OPTION
TERMINAL
BLOCK
1
(
L
)
2
(
N
)
4
3
5
TO OUTDOOR UNIT
OUTDOOR WIRING DIAGRAM
INDOOR WIRING DIAGRAM
INDOOR
MOTOR
DRAIN
PUMP
BR
BR
BL
RD
BK
GN/YL
YL
OR
RD
BL
BL
BL
BK
GN/YL
COMP
4 WAY
FUSE
250V10A
ROOM.
THERMISTOR
PIPE
THERMISTOR
FLOAT S/W
REMOTE
CONTROL
ZONE
CONTROL
OPTIONAL
EXTRA
EXTRA
TERMINAL
BLOCK
TO OUTDOOR UNIT
3854A20031X
3(L)
4(N)
5
6
7
OUTDOOR WIRING DIAGRAM
INDOOR WIRING DIAGRAM
TO OUTDOOR UNIT
INDOOR
MOTOR
DRAIN
PUMP
BR
BR
YL
OR
RD
BL
BL
RD
BL
BL
BK
GN/YL
GN/YL
COMP
FUSE
250V10A
TEMP.
THERMISTOR
PIPE
THERMISTOR
FLOAT S/W
REMOTE
CONTROL
ZONE
CONTROL
OPTION
TERMINAL
BLOCK
1
(
L
)
2
(
N
)
4
3
5
BK
WH
BL
GN/YL
GN/YL
TMo
T
o
the indoor unit
1
2
3
4
5
5
6
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
–19–
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.
SET TEMP.+0.5°C
(COMP. ON)
SET TEMP. -0.5°C
(COMP. OFF)
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
–20–
Intake Air temp.
Setting temp.+3°C
(Compressor OFF)
Setting temp.
(Compressor ON)
(Compressor ON)
INDOOR FAN
Low
OFF Low
Low
OFF
COMPRESSOR
ON
OFF
ON
OFF
• A point;
While the indoor Heat-Exchanger temperature is higher than 40°C fan operates at low speed, when
it becomes lower than 40˚C fan stops.
• B point;
When the indoor Heat-Exchanger temperature is higher than 42°C, fan operates at seleted fan
speed, when it becomes lower than 39°C, the fan operates at low speed.
4. Heating Mode Operation (Except Cooling Model)
The unit will operate according to the setting by the remote controller and the operation diagram is shown as following.
Hot Start
Low
Selecting
Fan Speed
minimum 3min
Selecting fan
speed
minimum
10sec.
1min
A
A
minimum
10sec.
B
5. Hot-Start Control
• The indoor fan stops until the evaporator piping temperature will be reached to 31°C.
• The operation diagram is as following.
PIPING
TEMPERATURE
TEMPERATURE
1min
COMPRESSOR
INDOOR FAN
ON
28
°
C
: Selected Fan
: Low Fan
: Fan Stop
31
°
C
Click on the first or last page to see other LB-D1861 / LB-D2461 / LB-F3061 / LB-F3661 / LB-F3681 / LB-F4261 / LB-E4881 / LB-E6081 / LB-E6084_HL_CL_HP_CP service manuals if exist.