LG LB-F3680HL / LB-F3680CL Service Manual ▷ View online
■
Model: LB-F3680CL
(1) Indoor Unit
(2) Outdoor Unit
–10–
2
6
COi
GN/YL
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
CN-OUT
1
3
6
INDOOR ELECTRIC CIRCUIT
INDOOR UNIT
OUTDOOR UNIT
P/NO : 3854A90010X
3
2
1
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
CN-TH
EVA
TH
ROOM
TH1
DC-12V
SIGNAL
GND
Re
CN-REMO
( RD
)
( YL
)
( BR
)
1
TM
380-415V
3ø,50Hz
POWER SUPPLY
BK
52C
1
3
5
31
2
4
6
32
B
A
BK
WH
WH
T/B
F1
BK
WH
RD
WH
BK
RD
WH
T1
T3
T2
Co
OR
YL
Co
OR
FMo
1
FMo
2
CM
YL
BK
BK
BR
BK
BK
WH
WH
WH
WH
2 3 4
R S T N
1
TM
380-415V
3ø,50Hz
POWER SUPPLY
BK
52C
Outdoor Unit Wiring Diagram
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
NOTE
BL : BLUE
BK : BLACK
BR : BROWN
OR : ORANGE
BK : BLACK
BR : BROWN
OR : ORANGE
52C
TMo
CM
Co
MAGNECTIC CONTACTOR
TERMINAL BLOCK
COMPRESSOR
RUN CAPACITOR FMo
TM
FMo
F1
MAIN TERMINAL BLOCK
OURDOOR FAN MOTOR
FUSE (250V, 5A)
P/NO : 3854A90010Y
RD : RED
WH : WHITE
WH : WHITE
FMo
2
CM
YL
BK
BK
BR
BL
BK
BK
BK
WH
WIRING OF FIELD
(CONNECTING WIRE)
(CONNECTING WIRE)
GN/YL
TMo
T
o the indoor unit
WH
WH
2 3 4
R S T N
1
2
3
4
5
5
6
GN/YL : GREEN/YELLOW
–11–
Operation Details
(1) The function of main control
1. Time Delay safety Control
• 3min
¡ƒ
The compressor is ceased for 3minutes to balance the pressure in the refrigeration cycle.
(Protection of compressor)
• 30sec
¡ƒ
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
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
ƒU
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.
ƒU
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.
–12–
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
ƒU
The indoor fan stops until the evaporator piping temperature will be reached to 31°C.
ƒU
The operation diagram is as following.
PIPING
TEMPERATURE
TEMPERATURE
1min
COMPRESSOR
INDOOR FAN
ON
28
°
C
: Selected Fan
: Low Fan
: Fan Stop
31
°
C
6. Defrost Control
• Defrost operation is controlled by timer and sensing the outdoor piping temperature.
• The defrost starts only when the outdoor pipe temperature falls below -6°C after 45 minutes passed from starting
• The defrost starts only when the outdoor pipe temperature falls below -6°C after 45 minutes passed from starting
of heating operation.
• Defrost ends after 10 minutes passed from starting of defrost operation or when the outdoor pipe
temperature rises over 12°C even if before 10 minutes.
7. Auto Restarting Operation
• When the power is restored after a sudden power failure while in appliance operation, the mode before the
power failure is kept on the memory and the appliance should be on the automatically operates in the mode on
the memory.
the memory.
• Operation Mode that is kept on the memory
- State of Operation ON/OFF
- Operation Mode/Setting Temp/Selected Airflow Speed
- Operation Mode/Setting Temp/Selected Airflow Speed
• If no input by the remote controller within 7 hr after the appliance operates by the Auto Restarting operation,
the appliance is forced to stop at the moment of 7-hr elapse.
8. Self-Diagnosis Function
• 'CHECK' will flash in the remote controller display when a problem occurs. Then please contact your dealer.
• Correct the accident point as shown in the table below before restarting operation.
• During the normal operation 'CHECK' won't be displayed in the remote controller.
• Correct the accident point as shown in the table below before restarting operation.
• During the normal operation 'CHECK' won't be displayed in the remote controller.
–13–
More than 45 minutes of
heating operation
Outdoor Pipe Temp.
Indoor Fan
Compressor
4-Way Valve
ON
ON
ON
ON
OFF
ON
OFF
HOT-
START
ON
ON
OFF
OFF
ON
12
°
C
(Defrost OFF)
-6
°
C
(Defrost ON)
Within
10 minutes
Defrost
Defrost
More than 45 minutes of
heating operation
Remote controller LCD
Accident Point
F
1
Indoor temperature thermistor error
F2
Indoor piping thermistor error
F3
Indoor/Outdoor unit communication error
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