LG LBNK3660BL User manual

Ceiling Duct Air Conditioner
SVC MANUAL(Exploded View)
MODEL : LBNS3061BL LBUS3061BL
LBNS3062BL LBUS3062BL
LBNK3660BL LBUK3660BL
LBNK3661BL LBUK3662BL
LBNK4261BL LBUK4882BL
LBNK4881BL LBUM7280BL
LBNK4882BL LBUM9080BL
LBNH608RSS1 LBUM1081BL
LBNM7280BL LBNM7281BL
LBNM9080BL LBNM9081BL
LBNM1081BL
CAUTION
Before Servicing the unit, read the safety precautions in General SVC manual.
Only for authorized service personnel.
Internal Use Only
http://biz.lgservice.com

Contents
Functions .................................................................................................................................3
Product Specifications (Cooling & Heating)..........................................................................5
Dimensions ..............................................................................................................................8
Refrigeration Cycle Diagram ................................................................................................11
Wiring Diagram ......................................................................................................................12
Operation Details ...................................................................................................................19
Installation of Indoor, Outdoor Unit .....................................................................................22
Cycle ........................................................................................................................................36
Cycle Troubleshooting Guide ...............................................................................................39
Electronic Parts Troubleshooting Guide .............................................................................40
Electronic Control Device .....................................................................................................43
Exploded View ......................................................................................................................44
- 2 -
Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only

- 3 -
Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
Functions
Indoor Unit
Operation ON/OFF by Remote controller
Sensing the Room Temperature
Room temperature control
Starting Current Control
Time Delay Safety Control
Indoor Fan Speed Control
Soft Dry Operation Mode
Auto Operation(Auto Change Over)
Deice (defrost) control (Heating)
Auto Restart
Hot-start Control (Heating) • The indoor fan stops until the evaporator piping tempera-
ture will be reached at 28°C.
High head height Drain pump(Optional) • A standard drain-head height of up to 700mm is possible.
Central Control(Optional) •
It is operating individually or totally by central control function.
Group Control(Optional Wiring)
Radio Frequency Control (Optional)
• Each controller can control 16 units and 8 controllers can connect.
•
It operates maximum 16 units by only one wired remote con-
troller and each unit starts random to prevent overcurrent.
• Room temperature sensor. (Thermistor)
• Maintains the room temperature in accordance with the Setting Temp.
• Indoor fan is delayed for 5 seconds at the starting.
• Restarting is inhibited for approx. 3 minutes.
• High, Med, Low
• Intermittent operation of fan at low speed.
• Although the air-conditioner is turned off by a power failure, it is restarted automati-
cally previous operation mode after power supply.
• The setting temperature and desired operation mode are auto-
matically set by fuzzy rule.
• Both the indoor and outdoor fan stops during defrosting.
• Hot start after defrost ends.

Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes
–4–
Remote Controller
Operation ON/OFF
Operation Mode Selection
Fan Speed Selection
Room Temperature Display
Temperature Setting
Setting the Timer
Weekly Program
(Cooling
model only) (Heating
model only)
(Low) (Med) (High)
Cooling Operation Mode ( )
Heating Operation Mode ( ) Auto Operation Mode ( )
Soft Dry Operation Mode ( )
Fan Operation Mode
Fan Auto Function
HIMEDLO
Program Holiday
SET/CLR
MinHour
Week
Timer CancelTimer Cancel
:Used to control the indoor air flow when the comp is off.
:Fan operates without cooling & heating
( )AUTO
: High:39°C LOW:11°C
Cooling Heating
Down to 18°C
Up to 30°C
Down to 16°C
Up to 30°C

- 5 -
Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
Product Specifications (Cooling & Heating)
Power Source Ø, V, Hz
Cooling Capacity kcal/h(BTU/h)
W
Input W
Heating Capacity kcal/h(BTU/h)
W
Input W
Rated Load Amp. Cooling A
Heating A
Air Volumn Cooling(H/M/L) CMM(m3/min)
Heating(H/M/L)
Refrigerant(R-22) g
Drain Hose In. Dia mm
Main Cable No. X mm2
Connecting Cable
Remote Control Type
Refrigerant Control Type
Function Soft Dry
Timer
Self Diagnosis
Deice Operation
Hot Start
Zone Control(Optional)
Central Control(Optional)
Group Control(Optional wiring)
Radio Frequency Control(Optional)
Weekly Programming
Thermistor
Drain Pump(Optional)
Auto changeover(Auto Operation: CL)
Stand-by Consumption 0
Connecting Pipe Liquid Inch
Gas (mm)
Dimension Indoor mm
Outdoor (W x H x D)
Net Indoor Kg
Weight Outdoor
Model
LB-S3061BL LB-K3660BL LB-K4260BL LB-K4880BL
1, 220-240, 50 1, 220-240, 50 1, 220-240, 50 3, 380-415, 50
7,307(2,900) 9,072(36,000) 10,584(42,000) 12,096(48,000)
8,500 10,551 12,309 14,067
3,200 3,600 5,100 4,900
8,064(32,000) 9,072(36,000) 11,314(45,500) 12,096(48,000)
9,378 10,551 13,190 14,067
3,000 3,400 4,700 4,400
14 16 22.5 8
13.5 14 21 7.3
30/26/22 35/32/28 46/38/32 49/47/44
30/26/22 35/32/28 46/38/32 49/47/44
2,020 2,240 3,600 3,351
22.6 22.6 22.6 22.6
3*3.5 3*5.5 3*8.5 4*3.5
5*1.25 5*1.25 5*1.25 5*1.25
L.C.D Wired L.C.D Wired L.C.D Wired L.C.D Wired
Orifice/Capillary Orifice/Capillary Orifice/Capillary Orifice/Capillary
Ye s Ye s Ye s Ye s
24 Hours On/Off 24 Hours On/Off 24 Hours On/Off 24 Hours On/Off
Ye s Ye s Ye s Ye s
Ye s Ye s Ye s Ye s
Ye s Ye s Ye s Ye s
Optional Optional Optional Optional
Optional Optional Optional Optional
Ye s Ye s Ye s Ye s
Optional Optional Optional Optional
Ye s Ye s Ye s Ye s
Ye s Ye s Ye s Ye s
Optional Optional Optional Optional
Ye s Ye s Ye s Ye s
Ye s Ye s Ye s Ye s
3/8(9.52) 3/8(9.52) 3/8(9.52) 3/8(9.52)
5/8(15.88) 5/8(15.88) 3/4(19.05) 3/4(19.05)
890*350*560 1,030*350*435 1,030*350*435 1,030*350*435
870*800*320 870*800*320 900*1,220*370 900*1,220*370
32 37 37 40
72 72 90 92

Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes
–6–
Power Source Ø, V, Hz
Cooling Capacity kcal/h(BTU/h)
W
Input W
Heating Capacity kcal/h(BTU/h)
W
Input W
Rated Load Amp. Cooling A
Heating A
Air Volumn Indoor(H/M/L) CMM(m3/min)
Refrigerant(R-22) g
Drain Hose In. Dia mm
Main Cable No. X mm2
Connecting Cable
Remote Control Type
Refrigerant Control Type
Function Soft Dry
Timer
Self Diagnosis
Deice Operation
Hot Start
Zone Control(Optional)
Central Control(Optional)
Group Control(Optional wiring)
Radio Frequency Control(Optional)
Weekly Programming
Thermistor
Drain Pump(Optional)
Auto changeover(Auto Operation: CL)
Stand-by Consumption 0
Connecting Pipe Liquid Inch
Gas (mm)
Dimension Indoor mm
Outdoor (W x H x D)
Net Indoor Kg
Weight Outdoor
Model
LB-S3062BL LB-K3660BL LB-K4260BL LB-K4882BL
1, 220-240, 50 1, 220-240, 50 1, 220-240, 50 3, 380-415, 50
7,060(28,000) 9,072(36,000) 10,584(42,000) 11,843(47,000)
8,206 10,551 12,309 13,774
3,300 3,600 5,100 5,100
7,182(28,500) 9,072(36,000) 11,314(45,500) 12,096(48,000)
8,353 10,551 13,190 14,067
2,700 3,400 4,700 4,300
15 16 22.5 19
12.5 14 21 17
32/28/23 35/32/28 46/38/32 49/47/44
2,020 2,240 3,600 3,351
22.6 22.6 22.6 22.6
3*3.5 3*5.5 3*8.5 4*3.5
5*1.25 5*1.25 5*1.25 5*1.25
L.C.D Wired L.C.D Wired L.C.D Wired L.C.D Wired
Orifice/Capillary Orifice/Capillary Orifice/Capillary Orifice/Capillary
Ye s Ye s Ye s Ye s
24 Hours On/Off 24 Hours On/Off 24 Hours On/Off 24 Hours On/Off
Ye s Ye s Ye s Ye s
Ye s Ye s Ye s Ye s
Ye s Ye s Ye s Ye s
Optional Optional Optional Optional
Optional Optional Optional Optional
Ye s Ye s Ye s Ye s
Optional Optional Optional Optional
Ye s Ye s Ye s Ye s
Ye s Ye s Ye s Ye s
Optional Optional Optional Optional
Ye s Ye s Ye s Ye s
Ye s Ye s Ye s Ye s
3/8(9.52) 3/8(9.52) 3/8(9.52) 3/8(9.52)
5/8(15.88) 5/8(15.88) 3/4(19.05) 3/4(19.05)
1,030*350*435 1,030*350*435 1,030*350*435 1,120*400*575
870*800*320 870*800*320 900*1,220*370 900*1,220*370
37 37 37 51
72 72 90 92

Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes
–7–
3, 380-415, 50 3, 380-415, 50 3,380-415, 50 3, 380-415, 50
14,364(57,000) 18,143(72,000) 21,924(87,000) 25,200(100,000)
16,705 21,101 25,497 29,307
6,800 7,000 8,800 10,500
14,364(57,000) 18,143(72,000) 21,924(87,000) 26,208(104,000)
16,705 21,101 25,497 30,479
5,400 6,800 7,400 8,700
12 13 14.5 17
10 13 12.7 14.7
55/50/46 73/68/62 84/76/65 84/76/65
55/50/46 73/68/62 84/76/65 84/76/65
3,800 6,931 8,100 8,000
22.6 22.6 22.6 22.6
4*5.5 4*3.5 4*5.5 4*5.5
5*1.25 5*1.25 5*1.25 5*1.25
L.C.D Wired L.C.D Wired L.C.D Wired L.C.D Wired
Capillary/Capillary Orifice/Capillary Orifice/Capillary Orifice/Capillary
Ye s Ye s Ye s Ye s
24 Hours On/Off 24 Hours On/Off 24 Hours On/Off 24 Hours On/Off
Ye s Ye s Ye s Ye s
Ye s Ye s Ye s Ye s
Ye s Ye s Ye s Ye s
Optional Optional Optional Optional
Optional Optional Optional Optional
Ye s Ye s Ye s Ye s
Optional Optional Optional Optional
Ye s Ye s Ye s Ye s
Ye s Ye s Ye s Ye s
Optional Optional Optional Optional
Ye s Ye s Ye s Ye s
Ye s Ye s Ye s Ye s
3/8(9.52) 1/2(12.7) 5/8(15.88) 5/8(15.88)
3/4(19.05) 1(25.4) 9/8(28.0) 9/8(28.0)
1,230*400*590 1,420*400*575 1,596*450*658 1,596*450*658
900*1,220*370 1,245*930*650 1,245*930*650 1,245*930*650
60 58 84 88
103 185 190 195
Power Source Ø, V, Hz
Cooling Capacity kcal/h(BTU/h)
W
Input W
Heating Capacity kcal/h(BTU/h)
W
Input W
Rated Load Amp. Cooling A
Heating A
Air Volumn Cooling(H/M/L) CMM(m3/min)
Heating(H/M/L)
Refrigerant(R-22) g
Drain Hose In. Dia mm
Main Cable No. X mm2
Connecting Cable
Remote Control Type
Refrigerant Control Type
Function Soft Dry
Timer
Self Diagnosis
Deice Operation
Hot Start
Zone Control(Optional)
Central Control(Optional)
Group Control(Optional wiring)
Radio Frequency Control(Optional)
Weekly Programming
Thermistor
Drain Pump(Optional)
Auto changeover(Auto Operation: CL)
Stand-by Consumption 0
Connecting Pipe Liquid Inch
Gas (mm)
Dimension Indoor mm
Outdoor (W x H x D)
Net Indoor Kg
Weight Outdoor
Model
LB-H608RSS1 LB-M7280BL LB-M9080BL LB-M1081BL

Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes
Dimensions
–8–
1. Indoor
"D" "F"
"X" "Y"2323
LIQUID
LINE
SUCTION
LINE
"C"
"B"
"A"
"G"
"E"
169
"T"
"W"
"S"
250
"J" "K" "L" "K"
"Q"
"P"
"R"
"M"
"N"
"M"
"N"
"J" "K" "L" "K"
"X"
"A"
"S"
250
"P"
"E"
"Q"
"G"
"T"
169
"R"
LIQUID
LINE
SUCTION
LINE
"B" "D"
23 23"Y"
"C"
"F"
"V" "W"
(30K/36K)
(42K/48K)
(72K/90K/100K)
"A" "B" "C" "D" "E" "F" "G" "J" "K" "L" "M" "N" "P" "Q" "R" "S" "T" "V" "W" "X" "Y"
MODEL NO
LBNS3061BL
LBNS3062BL/LBNK3661BL
LBNK4261BL
LBNK4881BL
LBNK4882BL
890
1040
1040
1040
1120
350
350
350
350
400
560
560
560
560
580
253
282
282
282
305
482
712
712
712
712
282
282
282
282
327
718
868
868
868
935
168
366
131
131
171
234
234
250
250
234
-
-
210
210
239
170
170
170
170
183
163
165
161
161
165
798
934
934
934
1014
798
937
937
937
1014
–
548
548
548
567
40
40
40
40
67
120
120
120
120
130
22
22
22
22
22
79
79
79
79
84
822
972
972
972
1052
514
514
514
514
533
"A" "B" "C" "D" "E" "F" "G" "J" "K" "L" "M" "N" "P" "Q" "R" "S" "T" "V" "W" "X" "Y"
MODEL NO
LBNM7281BL
LBNM9081BL
LBNM1081BL
1415
1596
1596
400
450
450
580
658
658
303
303
303
833
835
835
327
377
377
1221
1403
1403
258
348
348
300
300
300
228
230
230
182
219
219
165
185
185
1327
1504
1504
1327
1504
1504
567
-
-
67
80
80
130
190
190
22
22
22
78
78
78
1351
1532
1532
533
612
612

- 9 -
Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
"A" "B" "C" "D" "E" "F" "G" "J" "K" "L" "M" "N" "P" "Q" "R" "S" "T" "V" "W" "X" "Y"
MODEL NO
LBNH608RSS1 1358 400 652 294 1004 303 1093 215 276 242 172 177 1270 1281 1475 31 105 26 221 1230 590

- 10 -
Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
2. Outdoor Unit
Type: A Type: B Type: C
b
a
c
b
a
c
c
b
a
Model No. a b c TYPE
LBUS3061BL/LBUS3062BL 870 320 800 A
LBUK3660BL 870 320 800 A
LBUK4260BL 900 370 1220 B
LBUK4880BL/LBUK4882BL 900 370 1220 B
LBUH608RSS1 900 370 1220 B
LBUM7280BL 1,245 650 930 C
LBUM9080BL 1,245 650 930 C
LBUM1081BL 1,245 650 930 C
(Unit: mm)

- 11 -
Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
Refrigeration Cycle Diagram
Heat Pump
ORIFICE
(Capillary only
for 60k Btu)
ORIFICE
(Only for
60k Btu)
HP
•If 60K Model is installed at a distance of 15m, 525g of refrigerant should be added
(15-7.5) x 70g = 525g
30k Btu/h 5/8" 3/8" 7.5 30 5 15 70
36k Btu/h 5/8" 3/8" 7.5 30 5 15 50
42k Btu /h 3/4'' 3/8" 7.5 30 5 15 70
48k
Btu /h 3/4'' 3/8" 7.5 30 5 15 70
60k
Btu /h 3/4'' 3/8" 7.5 30 5 15 70
72k
Btu /h 1'' 1/2" 7.5 25 5 20 70
90k
Btu /h 9/8'' 5/8" 7.5 30 5 20 90
100k
Btu /h 9/8'' 5/8" 7.5 30 5 20 100
Capacity
Gas Liquid
Elevation B(m)
Piping Length
A(m)
* Additional
Refrigerant
(g/m)
Pipe Size (Diam-
eter: Ø)
inch
Standard
Standard
Max.
Max.
Capacity Orifice Number
30k 63
36k 62
42k 74/72
48k 86/90
72k 98
90k 84
100k 104
Orifice Number

Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes
–12–
Wiring Diagram
Model : LB-S3061/3062BL
1. Indoor(LBNS3061/3062BL)
2. Outdoor(LBUS3061/3062BL)
INDOOR WIRING DIAGRAM
INDOOR
MOTOR
DRAIN
PUMP
OR
OR
BR
BL
RD
BK
BL WH GY
BL BL
BR
GN/YL
COMP
4 WAY
FUSE
250V10A
ROOM.
THERMISTOR
PIPE
THERMISTOR
RF REMOTE
CONTROL
FLOAT S/W
REMOTE
CONTROL
ZONE
CONTROL
OPTIONAL
EXTRA
TERMINAL
BLOCK
TO OUTDOOR UNIT
3854A20172T
3(L) 4(N) 5 6 7
TELE
CONTROL
GN/YLGN/YL
78
1TM
240V 1Ø, 50Hz
POWER SUPPLY
BK
52C
Outdoor Unit Wiring Diagram
L1 L2
T1 T2
A2
A1
BK
WH
BK
52F1 12
34
56
WH
TIMER
BK
WH
YL
YL
BL
BL
WH
F1
BK
WH
WH
WH
C TH
20SV
52S,52C
Tmo
TM
52F1
Cr
CM
Co
FMo
F1
D.P
CH1
Cs
THERMISTOR FOR PIPE TEMP.
REVERSING COIL
MAGNECTIC CONTACTOR
TERMINAL BLOCK
MAIN TERMINAL BLOCK
RELAY FOR FMo
RUN CAPACITOR FOR CM
COMPRESSOR
RUN CAPACITOR FOR FMo
OUTDOOR FAN MOTOR
FUSE (250V, 5A)
DEICER PCB
CRANK CASE HEATER FOR CM
START CAPACITOR FOR CM
P/NO : 3854A20026V
20SV
WH
BK
RD
BL
BK
BK
WH
BK
BK
WIRING OF FIELD
(CONNECTING WIRE)
GN/YL Tmo
To the indoor unit
WH
GN/YL
23
LN
1
2
3
4
5
6
BK
BK
BK
BK
YL
YL
YL
BK
RD
WH RD
RD
OR
RC
S
CM
Cr
FMo
BK BK
BKBK
WH
52S
REACTOR
A2
A1
T3
L3
T2
L2
NOTE
BL : BLUE
BK : BLACK
BR : BROWN
RD : RED
WH : WHITE
YL : YELLOW
OR : ORANGE
GN/YL : GREEN/YELLOW
TNS
NC NO NC NO
C TH
D.P

- 13 -
Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
Model : LB-K3661BL
1. Indoor (LBNK3661BL)
2. Outdoor (LBUK3660BL)
78
1TM
240V 1Ø, 50Hz
POWER SUPPLY
BK
52C
Outdoor Unit Wiring Diagram
L1 L2
T1 T2
A2
A1
BK
WH
BK
52F1 12
34
56
WH
TIMER
BK
WH
YL
YL
BL
BL
WH
F1
BK
WH
WH
WH
C TH
20SV
52S,52C
Tmo
TM
52F1
Cr
CM
Co
FMo
F1
D.P
CH1
Cs
THERMISTOR FOR PIPE TEMP.
REVERSING COIL
MAGNECTIC CONTACTOR
TERMINAL BLOCK
MAIN TERMINAL BLOCK
RELAY FOR FMo
RUN CAPACITOR FOR CM
COMPRESSOR
RUN CAPACITOR FOR FMo
OUTDOOR FAN MOTOR
FUSE (250V, 5A)
DEICER PCB
CRANK CASE HEATER FOR CM
START CAPACITOR FOR CM
P/NO : 3854A20026W
20SV
WH
BK
RD
BL
BK
BK
WH
BK
BK
WIRING OF FIELD
(CONNECTING WIRE)
GN/YL Tmo
To the indoor unit
WH
GN/YL
23
LN
1
2
3
4
5
6
BK
BK
BK
BK
YL
BK
YL
YL
BK
RD
WH RD
RD
OR
RC
S
CM
Cr
Cs
FMo
BK BK
BKBK
WH
52S
REACTOR
A2
A1
T3
L3
T2
L2
NOTE
BL : BLUE
BK : BLACK
BR : BROWN
RD : RED
WH : WHITE
YL : YELLOW
OR : ORANGE
GN/YL : GREEN/YELLOW
TNS
NC NO NC NO
C TH
D.P
INDOOR WIRING DIAGRAM
INDOOR
MOTOR
DRAIN
PUMP
OR
OR
BR
BL
RD
BK
BL WH GY
BL BL
BR
GN/YL
COMP
4 WAY
FUSE
250V10A
ROOM.
THERMISTOR
PIPE
THERMISTOR
RF REMOTE
CONTROL
FLOAT S/W
REMOTE
CONTROL
ZONE
CONTROL
OPTIONAL
EXTRA
TERMINAL
BLOCK
TO OUTDOOR UNIT
3854A20172T
3(L) 4(N) 5 6 7
TELE
CONTROL
GN/YLGN/YL

- 14 -
Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
Model : LB-K4260BL
1. Indoor (LBNK4261BL)
2. Outdoor (LBUK4260BL)
OUTDOOR UNIT WIRING DIAGRAM P/No.:3854A20135J
F1
S.S(A)
S.S(B)
52C(A)
52C(B) 52F1
D.P
TNS
COMP
49C
RS
Tm
1(L)
F1,2
49C
FMo
49FMo
FUSE(250V,5A)
INTERNAL O.L.P FOR COMP.
OUTDOOR FAN MOTOR
INTERNAL T.P FOR FMo
DEICER PCB.
THERMISTOR FOR PIPE TEMP.(OUTDOOR)
4-WAY VALVE COIL
START CAPACITOR FOR FMo
RELAY FOR COMP
RELAY FOR FMo
SOFT START PCB.
RUN CAPACITOR FOR FMo
MAIN TERMINAL BLOCK
TERMINAL BLOCK FOR CONNECTING
3 PHASE DETECTOR
5 SEC. DELAY TIMER
D.P
C TH
20SV
Cs
52C
52F1
S.S
Cr
Tm
Tmo
3.P.D
T.D
2(N)
C
COMP
49C
RS
C
POWER SUPPLY
1Ø,230V,50Hz~ FMo
49FMo
FMo
49FMo
20SV 20SV
NOTE
TO INDOOR UNIT
CHF
Cs(A)
Cr(A)
Cr(B)
T.D
Tmo
F2
BK
BL
BK
NC NO
CTH
BK
RD
RD
BK
WH
WH
BK
BL : BLUE
BK : BLACK
BR : BROWN
OR : ORANGE
RD : RED
WH : WHITE
YL : YELLOW
GN/YL : GREEN/YELLOW
BR
BR
BL
BL
BR RD BK BL
BK
OR
BK
OR YL
BK
BK BK BK BK
1(L) 2(N) 3 4 5
OR OR YL
YL
YL
RD
RD
BK
CHF
WH
BK BK BK
WH
WH
WH
WH
WH
WH
WH
WH WH WH
WH
YL
YL
TB3
TB5
TB1
TB2
TB6
CN-Power
CN-Power
RY-
Comp
4
3
4
4
1
3
2
56
78
3
4
3
4
3
RY-
S/Cap
Cs(B)
RY-
Comp
RY-
S/Cap
INDOOR WIRING DIAGRAM
INDOOR
MOTOR
DRAIN
PUMP
OR
OR
BR
BL
RD
BK
BL WH GY
BL BL
BR
GN/YL
COMP
4 WAY
FUSE
250V10A
ROOM.
THERMISTOR
PIPE
THERMISTOR
RF REMOTE
CONTROL
FLOAT S/W
REMOTE
CONTROL
ZONE
CONTROL
OPTIONAL
EXTRA
TERMINAL
BLOCK
TO OUTDOOR UNIT
3854A20172T
3(L) 4(N) 5 6 7
TELE
CONTROL
GN/YLGN/YL

- 15 -
Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
Model : LB-K4880/4882BL
1. Indoor (LB-K4880/4882BL)
2. Outdoor (LB-K4880/4882BL)
INDOOR WIRING DIAGRAM
INDOOR
MOTOR
DRAIN
PUMP
OR
OR
BR
BL
RD
BK
BL WH GY
BL BL
BR
GN/YL
COMP
4 WAY
FUSE
250V10A
ROOM.
THERMISTOR
PIPE
THERMISTOR
RF REMOTE
CONTROL
FLOAT S/W
REMOTE
CONTROL
ZONE
CONTROL
OPTIONAL
EXTRA
TERMINAL
BLOCK
TO OUTDOOR UNIT
3854A20172T
3(L) 4(N) 5 6 7
TELE
CONTROL
GN/YLGN/YL
NOTE
BL : BLUE
BK : BLACK
OR : ORANGE
GN/YL : GREEN/YELLOW
RD : RED
WH : WHITE
YL : YELLOW
Outdoor Unit Wiring Diagram
RTM
3Ø,380-415V, 50Hz
POWER SUPPLY
STN
BK
BK
BK
BK
RD
WH
WH
RD
OR
BK
63H2
3.D.P
WH
WH
YL
D.P CTH
TNS NO NC
WH
OR
BK 52F1
52C 1
2
3
4
5
6
31 T/B1
T/B2
T/B3
32
B
A
FMo
49FMo
FMo
49FMo
YL BK
OR
BK RD
WH
CM
12
34
56
78
YL BK
OR
BK
BK
BL
BL
BL
BL
WH
WH
Co Co
20SV
GN/YL
TMo
To the indoor unit
1
2
3
4
5
6
BK
WHWH YL
RD
F1
BK
63H2
C TH
49FMo
20SV
CM
HIGH PRESSURE SWITCH FOR HEATING
THERMISTOR FOR PIPE TEMP.
INTERNAL T.P FOR FMo
REVERSING COIL
COMPRESSOR
52C
TM
52F1
D.P
3.D.P
MAGNECTIC CONTACTOR
MAIN TERMINAL BLOCK
RELAY FOR FMo
DEICER PCB
3 PHASE DETECTOR
Co
FMo
F1
TMo
SOL
RUN CAPACITOR FOR FMo
OUTDOOR FAN MOTOR
FUSE (250V,10A)
TERMINAL BLOCK
SOLENOID VALVE
P/NO : 3854A20021Z
F1
R
AB
ST
VUW

- 16 -
Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
Model : LB-H608RSS1
1. Indoor
2. Outdoor

- 17 -
Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
Model : LB-M7280BL
1. Indoor (LBNM7281BL)
2. Outdoor (LBUM7280BL)
OUTDOOR UNIT WIRING DIAGRAM P/NO.:3854A20021V
BK
F1
BK
BK
TNS
NC NO NC NO
C TH
BK
BK BK
12
34
56
78
R
BA
ST
BK
WH
WH
WH WH
WH
WH F2
RD
RD
RD
BK
GN/YL
1(L)
2(N)
345
Tmo
TO INDOOR UNIT
YL
OR
YL BL
BK
BL
BL
BL : BLUE
BK : BLACK
BR : BROWN
OR : ORANGE
F1,2,3
49C
FMo
49FMo
Co
D.P
C TH
20SV
52C
52F1
TM
TMo
63H1
63H2
3.P.D
HIGH PRESSURE SWITCH
HIGH PRESSURE SWITCH FOR HEATING
3 PHASE DETECTOR
MAGNETIC CONTACTOR
RELAY FOR FMo
MAIN TERMINAL BLOCK
TERMINAL BLOCK FOR CONNECTING
RUN CAPACITOR FOR FMo
DEICER PCB
THETMISTOR FOR PIPE TEMP.(OUTDOOR)
4-WAY VALVE COIL
FUSE(250V,10A)
INTERNAL O.L.P FOR COMP.
OUTDOOR FAN MOTOR
INTERNAL T.P FOR FMo
RD : RED
WH : WHITE
YL : YELLOW
GN/YL : GREEN/YELLOW
20SV
NOTE
YL BR OR BK
YL BR OR BK
YL BR OR BK
YL BR OR BK
RD
13521
24622
A1
A2
RD BK WH
GN/YL
F3
Tm
Co
FMo
49FMo
FMo
49FMo COMP
49C
Co
T1 T3 T2
POWER SUPPLY
3Ø,380-415,50Hz
TERMINAL(4P)
RSTN
63H1
63H2
52C
52F1
3.P.D
D.P
RD
INDOOR WIRING DIAGRAM
INDOOR
MOTOR
DRAIN
PUMP
OR
OR
BR
BL
RD
BK
BL WH GY
BL BL
BR
GN/YL
COMP
4 WAY
FUSE
250V10A
ROOM.
THERMISTOR
PIPE
THERMISTOR
RF REMOTE
CONTROL
FLOAT S/W
REMOTE
CONTROL
ZONE
CONTROL
OPTIONAL
EXTRA
TERMINAL
BLOCK
TO OUTDOOR UNIT
3854A20172T
3(L) 4(N) 5 6 7
TELE
CONTROL
GN/YLGN/YL

- 18 -
Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
Model : LB-M9080BL/LB-M1081BL
1. Indoor (LBNM9081BL/LBNM1081BL)
2. Outdoor (LBUM9080BL/LBUM1081BL)
3854A20317B
OUTDOOR UNIT WIRING DIAGRAM
BR
BK
BK
BK BK
TNS
NC NO NC NO
C TH
D.P
WH
YL
BL
BL
BL
BL
RD
20SV
BR
BR
TO INDOOR UNIT
BR
1(L)
2(N)
3
4
5
6
BL
BK
GN/YL
RD
BL
12
34
56
78
TB1
TB2 52F1
3.P.D
RST
AB
WH
WH
RD
RD
F2
63H1
F3
BL BL
BL
YLYL BRBR BKBK OROR YLYL BRBR BK
BK
BR
BL
RD
YL
WH RD
BK
OROR
R
POWER SUPPLY
3Ø,380-415,50Hz
TERMINAL(4P)
Tm
Tmo
Co
FMo
49FMo
F1,F2,F3
49C
FMo
49FMo
FUSE(250V,10A)
INTERNAL O.L.P FOR COMP.
OUTDOOR FAN MOTOR
INTERNAL T.P FOR FMo
52C
52F1
TM
TMo
MAGNETIC CONTACTOR
RELAY FOR FMo
MAIN TERMINAL BLOCK
TERMINAL BLOCK FOR CONNECTING
63H1
63H2
3.P.D
T.D
HIGH PRESSURE SWITCH
HIGH PRESSURE SWITCH FOR HEATING
3 PHASE DETECTOR
5 SEC. DELAY TIMER
Co
D.P
C TH
20SV
RUN CAPACITOR FOR FMo
DEICER PCB
THERMISTOR FOR PIPE TEMP.(OUTDOOR)
REVERSING COIL
FMo
49FMo A-COMP
49C
B-COMP
49C
Co
VUWVUW
BK WH RD
STN
BL
GN/YL
A-52C
A2
21
22
1
2
3
4
5
6A1
A2
21
22 A1
B-52C
1
2
3
4
5
6
T.D
RD
F1
INDOOR WIRING DIAGRAM
INDOOR
MOTOR
DRAIN
PUMP
OR
OR
BR
BL
RD
BK
BL WH GY
BL BL
BR
GN/YL
COMP
4 WAY
FUSE
250V10A
ROOM.
THERMISTOR
PIPE
THERMISTOR
RF REMOTE
CONTROL
FLOAT S/W
REMOTE
CONTROL
ZONE
CONTROL
OPTIONAL
EXTRA
TERMINAL
BLOCK
TO OUTDOOR UNIT
3854A20172T
3(L) 4(N) 5 6 7
TELE
CONTROL
GN/YLGN/YL

- 19 -
Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
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 -
Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
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
•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
AA
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 1min
COMPRESSOR
INDOOR FAN
ON
28°C
: Selected Fan : Low Fan : Fan Stop
31°C