DOWNLOAD LG LB-F3680HL / LB-F3680CL Service Manual ↓ Size: 1.47 MB | Pages: 70 in PDF or view online for FREE

Model
LB-F3680HL LB-F3680CL
Pages
70
Size
1.47 MB
Type
PDF
Document
Service Manual
Brand
Device
Air Conditioner
File
lb-f3680hl-lb-f3680cl.zip
Date

LG LB-F3680HL / LB-F3680CL Service Manual ▷ View online

Wiring Diagram
Model: LB-F3680HL
(1) Indoor Unit
(2) Outdoor Unit
–9–
2
6
4
COi
GN/YL
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
CN-TH
EVA
TH
ROOM
TH1
1
3
6
DC-12V
SIGNAL
GND
CN-REMO
INDOOR ELECTRIC CIRCUIT
INDOOR UNIT
OUTDOOR UNIT
( RD
)
( YL
)
( BR
)
P/NO : 3854A90021E 
4
5
3
2
7
8
1
TM
380-415V
3Ø, 50Hz
POWER SUPPLY
BK
63H2
52C
1
3
5
31
2
4
6
32
B
A
BK
WH
BK
52F1
1
2
3
4
5
6
TNS
NO
C  TH
NC
D.P
WH
BK
BL
BK
WH
T/B1
F1
BK
WH
WH
RD
BK
WH
BK
BK
RD
WH
T1
T3
T2
CH1
 BR
Co
OR
YL
Co
OR
FMo
1
FMo
2
CM
YL
YL
BK
BK
BK
BL
WH
2 3 4
R S T N
20SV
BK
BK
BK
BK
BK
BK
WH
WH
BK
1
NOTE
BL  : BLUE
BK  : BLACK
BR  : BROWN
OR : ORANGE       GN/YL : GREEN/YELLOW
RD  : RED
WH : WHITE
YL  : YELLOW
Re
7
8
1
TM
380-415V
3Ø, 50Hz
POWER SUPPLY
BK
63H2
52C
Outdoor  Unit  Wiring  Diagram
1
3
5
31
2
4
6
32
B
A
BK
WH
BK
52F1
1
2
3
4
5
6
TNS
NO
C  TH
NC
D.P
WH
BK
WH
BK
WH
BL
RD
GN/YL
BL
BK
WH
T/B1
F1
BK
WH
WH
RD
BK
WH
BK
BK
RD
WH
T1
T3
T2
CH1
Co
OR
YL
Co
OR
FMo
1
NOTE
BL  : BLUE
BK  : BLACK
BR  : BROWN
OR : ORANGE       GN/YL : GREEN/YELLOW
63H2
C  TH
20SV
52C
Tmo
HIGH PRESSURE SWITCH FOR HEATING
THERMISTOR FOR PIPE TEMP.
REVERSING COIL
MAGNECTIC CONTACTOR
TERMINAL BLOCK
TM
52F1
CM
Co
FMo
MAIN TERMINAL BLOCK
RELAY FOR FMo
COMPRESSOR
RUN CAPACITOR FOR FMo
OUTDOOR FAN MOTOR
F1
DP
CH1
FUSE (250V, 5A)
DEICER PCB
CRANK CASE HEATER FOR CM
P/NO : 3854A90021F
RD  : RED
WH : WHITE
YL  : YELLOW
FMo
2
CM
YL
YL
BK
BK
BR
BK
BL
BK
WH
WIRING OF FIELD
(CONNECTING WIRE)
GN/YL
Tmo
T
o  the  indoor  unit
WH
2 3 4
R S T N
20SV
BK
BK
BK
BK
1
2
3
4
5
6
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
RD  : RED
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     
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
FMo
2
CM
YL
BK
BK
BR
BL
BK
BK
BK
WH
WIRING OF FIELD
(CONNECTING WIRE)
GN/YL
TMo
T
o  the  indoor  unit
WH
WH
2 3 4
R S T N
1
2
3
4
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) 
COMP. OFF
(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)
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
1min
COMPRESSOR
INDOOR FAN
ON
28
°
C
: Selected Fan
: Low Fan
: Fan Stop
31
°
C
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