LG LBNS3061BL User manual

Ceiling Duct Type
Air Conditioner
SERVICE MANUAL
MODELS: LBNS3061BL LBUS3061BL
LBNK3660BL LBUK3660BL
LBNK3661BL LBUK4260BL
LBNK4260BL LBUK4880BL
LBNK4261BL LBUL6080BL
LBNK4880BL LBUM7280BL
LBNK4881BL LBUM9080BL
LBNL6080BL LBUM1081BL
LBNL6081BL
LBNM7280BL
LBNM7281BL
LBNM9080BL
LBNM9081BL
LBNM1081BL

Contents
Functions .................................................................................................................................3
Product Specifications (Cooling & Heating)..........................................................................5
Dimensions ..............................................................................................................................7
Refrigeration Cycle Diagram ..................................................................................................9
Wiring Diagram ......................................................................................................................10
Operation Details ...................................................................................................................17
Installation of Indoor, Outdoor Unit .....................................................................................20
Cycle ........................................................................................................................................34
Cycle Troubleshooting Guide ...............................................................................................37
Electronic Parts Troubleshooting Guide .............................................................................38
Electronic Control Device .....................................................................................................41
Exploded View and Replacement Parts List .......................................................................42
–2–

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
–3–
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.

–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
HI AUTOMEDLO
Program Holiday
SET/CLR
MinHour
Week
Timer CancelTimer Cancel
: High:39°C ↔LOW:11°C
: Fan Operates without cooling & heating
Cooling Heating
Down to 18°C
Up to 30°C
Down to 16°C
Up to 30°C

Product Specifications (Cooling & Heating)
–5–
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
Refigerant Control Type
Fuction Soft Dry
Timer
Self Diagnosis
Deice Operation
Hot Start
Zone Control(Optional)
Central Control(Optional)
Group Control(Optional wiring)
Radio Frequency Control(Optional)
Weekly Programning
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

–6–
3, 380-415, 50 3, 380-415, 50 3,380-415, 50 3, 380-415, 50
15,120(60,000) 18,143(72,000) 21,924(87,000) 25,200(100,000)
17,585 21,101 25,497 29,307
7,000 7,000 8,800 10,500
15,120(60,000) 18,143(72,000) 21,924(87,000) 26,208(104,000)
17,585 21,101 25,497 30,479
6,500 6,800 7,400 8,700
12.7 13.0 14.5 17.0
12.5 13.0 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
4,629 6,931 8,100 8,000
22.6 22.6 22.6 22.6
4*3.5 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
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) 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)
1,120*400*575 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
51 58 84 88
92 185 190 195
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
Refigerant Control Type
Fuction Soft Dry
Timer
Self Diagnosis
Deice Operation
Hot Start
Zone Control(Optional)
Central Control(Optional)
Group Control(Optional wiring)
Radio Frequency Control(Optional)
Weekly Programning
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-L6080BL LB-M7280BL LB-M9080BL LB-M1081BL

Dimensions
–7–
1. Indoor
"A" "B" "C" "D" "E" "F" "G" "J" "K" "L" "M" "N" "P" "Q" "R" "S" "T" "V" "W" "X" "Y"
MODEL NO
LBNS3061BL
LBNK3661BL
LBNK4261BL
LBNK4881BL
LBNL6081BL
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
"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/60K)
(72K/90K/100K)

2. Outdoor Unit
–8–
Type: A Type: B Type: C
Model No. a b c TYPE
LBUS3061BL 870 320 800 A
LBUK3660BL 870 320 800 A
LBUK4260BL 900 370 1220 B
LBUK4880BL 900 370 1220 B
LBUL6080BL 900 370 1220 B
LBUM7280BL 1,245 650 930 C
LBUM9080BL 1,245 650 930 C
LBUM1081BL 1,245 650 930 C
(Unit: mm)
b
a
c
b
a
c
c
b
a

Refrigeration Cycle Diagram
–9–
Heat Pump
•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 15 7.5 12.5 70
36K BTU/h 5/8" 3/8" 7.5 15 7.5 12.5 50
42K BTU/h 3/4'' 3/8" 7.5 15 7.5 12.5 70
48K BTU/h 3/4'' 3/8" 7.5 15 7.5 12.5 70
60K BTU/h 3/4'' 3/8" 7.5 15 7.5 12.5 70
72K BTU/h 1'' 1/2" 7.5 25 7.5 20 70
90K BTU/h 9/8'' 5/8" 7.5 30 7.5 20 90
100K BTU/h 9/8'' 5/8" 7.5 30 7.5 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
48K 86
60K 86
72K 98
90K 84
100K 104
Orifice Number

–10–
Wiring Diagram
Model : LB-S3061BL
1. Indoor(LBNS3061BL)
2. Outdoor(LBUS3061BL)
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