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)