LG LS-K1820CL User manual

Room Air Conditioner
SERVICE MANUAL
MODEL : LS-K1820CL/CM/CN/HL/HM/HN
LS-K1822CL/CM/CN/HL/HM/HN
LS-K1860CL/CM/CN/HL/HM/HN
LS-K1861CL/CM/CN/HL/HM/HN
LS-K1862CL/CM/CN/HL/HM/HN
LS-K1865CL/CM/CN/HL/HM/HN
LS-K1866CL/CM/CN/HL/HM/HN
LS-K2460CL/CM/CN/HL/HM/HN
LS-K2462CL/CM/CN/HL/HM/HN
LS-K2420CL/CM/CN/HL/HM/HN
LS-K2422CL/CM/CN/HL/HM/HN
LS-K2621CL/CM/CN/HL/HM/HN
LS-K2661CL/CM/CN/HL/HM/HN
LS-K2662CL/CM/CN/HL/HM/HN
LS-K1863DL

- 2 -
Contents
Functions.................................................................................................................................3
Product Specifications ..........................................................................................................5
Dimensions............................................................................................................................12
Refrigeration Cycle Diagram................................................................................................14
Pipe Length and the Elevation.............................................................................................16
Wiring Diagram......................................................................................................................17
Operation Details ..................................................................................................................21
Display Function ...................................................................................................................29
Self-diagnosis Function........................................................................................................29
Installation .............................................................................................................................30
Operation ...............................................................................................................................43
Disassembly of the parts (Indoor Unit)...............................................................................45
2-way, 3-way Valve.................................................................................................................51
Cycle Troubleshooting Guide...............................................................................................58
Electronic Parts Troubleshooting Guide.............................................................................59
Electronic Control Device.....................................................................................................65
Schematic Diagram...............................................................................................................67
Exploded View & Replacement Parts List...........................................................................69

- 3 -
Functions
• Room temperature sensor. (THERMISTOR)
• Maintains the room temperature in accordance with the Setting Temp.
• Indoor fan is delayed for 5 sec at the starting.
• Restarting is inhibited for approx. 3 minutes.
• High, Med, Low
--- Lights up in operation
--- Lights up in Sleep Mode
--- Lights up in Timer Mode
--- Lights up in Deice Mode (for Heating Model)
OUTDOOR --- Lights up in compressor operation (for Cooling Model)
• Intermittent operation of fan at low speed.
• The fan is switched to low(Cooling), med(Heating) speed.
• The unit will be stopped after 1, 2, 3, 4, 5, 6, 7 hours.
• The fan is switched to intermittent or irregular operation
•
The fan speed is automatically switched from high to low speed.
• The louver can be set at the desired position or swing
up and down automatically.
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
Operation indication Lamps (LED)
Soft Dry Operation Mode
• Both the indoor and outdoor fan
stops during deicing.
• The indoor fan stops until the
evaporator piping temperature will be
reached at 28°C.
Sleep Mode Auto Control
Natural Air Control by CHAOS Logic
Airflow Direction Control
Deice (defrost) control (Heating)
Hot-start Control (Heating)

- 4 -
Healthy Dehumidification Operation Mode. ( )
Remote Controller
Operation ON/OFF
Reset
Operation Mode Selection
Temperature Setting
Timer Selection
Timer Setting
JET COOL
Timer Cancel
Sleep Operation
Airflow Direction Control
(Cooling
model only) (Heating
model only)
TEMPERATURE LOW HIGH
Cooling Operation Mode.( ) Heating Operation Mode.( ) Auto Operation Mode.( )
Fan Operation Mode
Horizontal Airflow Direction Control Button(Option)
Room, Temperature Display
Setting the Time or Timer
PLASMA(Option)/NEGATIVE ION(Option)
ON OFF
SET
PLASMA
CANCEL
Fan Speed Selection
(Low) (Med) (High) (CHAOS)
: (High:39°C Low:11°C)
: OFF, ON, OFF ON
: Cancel Sleep Mode, Timer ON or Timer OFF
: 1, 2, 3, 4, 5, 6, 7, Off Timer
: Fan Operates without cooling or heating.
Cooling Down to 18°C
Up to 30°CHeating Down to 16°C Up to 30°C

- 5 -
Product Specifications
Cooling Capacity BTU/h(kcal/h)
W
Heating Capacity BTU/h(kcal/h)
W
Moisture Removal l/h
Power Source Ø, V, Hz
Air Circulation m3/min
Noise Level dB(A)±3
Input W
Runnig Current A
Starting Current
A
E.E.R. BTU/h-W
C.O.P W/W
Motor Output W
mm
Net. Weight kg
Refrigerant(R-22) g
Airflow Direction Control (Up & Down)
Airflow Direction Control (Right & Left)
Negative lon
Air Purifying Filter
Deicer
Hot Start
Chaos Wind
Micom Dry
Timer
Self Diagnosis
Remocon type
Service valve
Sleeping Operation
Drain Hose
Connecting Cable
Power Cord
18,000(4,536)
5,274
-
-
2.5
1Ø, 220-240V, 50Hz
12
42
39
53
1,900
-
8.8
-
52
-
9.5
-
20
62
1,080 x 314 x 181
870 x 655 x 320
12
57
820
YES
NO
NO
NO(OPTION)
NO
NO
YES
YES
24hr ON/OFF
YES
L.C.D Wireless
1/4"(6.35)
1/2"(12.7)
YES
YES
1.5mm
2
1.5mm
2
18,000(4,536)
5,274
19,000(4,788)
5,564
2.5
1Ø, 220-240V, 50Hz
12
42
39
53
1,950
1,950
8.7
8.7
53
53
9.2
2.86
20
62
1,080 x 314 x 181
870 x 655 x 320
12
59
1,270
YES
NO
NO
NO(OPTION)
YES
YES
YES
YES
24hr ON/OFF
YES
L.C.D Wireless
1/4"(6.35)
1/2"(12.7)
YES
YES
1.5, 0.75mm
2
1.5mm
2
18,000(4,536)
5,274
-
-
2.5
1Ø, 220V, 60Hz
14
42
40
51
1,900
-
8.9
-
52
-
9.47
-
21
60
1,080 x 314 x 181
870 x 655 x 320
12
57
870
YES
NO
NO
NO
NO
NO
YES
YES
24hr ON/OFF
YES
L.C.D Wireless
1/4"(6.35)
5/8"(15.88)
YES
YES
1.5mm
2
1.5mm
2
18,000(4,536)
5,274
19,000(4,788)
5,564
2.5
1Ø, 220V, 60Hz
14
42
40
51
1,800
1,900
8.5
8.9
52
52
10.0
2.93
21
60
1,080 x 314 x 181
870 x 655 x 320
12
58
1,360
YES
NO
NO
NO
YES
YES
YES
YES
24hr ON/OFF
YES
L.C.D Wireless
1/4"(6.35)
5/8"(15.88)
YES
YES
1.5, 0.75mm
2
1.5mm
2
18,000(4,536)
5,274
-
-
2.5
1Ø, 220~240V, 50Hz
12
42
39
53
1,610
-
7.0
-
52
-
9.5
-
20
62
1,080 x 314 x 181
870 x 655 x 320
12
57
800
YES
NO
NO
NO
NO
NO
YES
YES
24hr ON/OFF
YES
L.C.D Wireless
1/2"(12.7)
5/8"(15.88)
YES
YES
1.5mm
2
1.5mm
2
Model Name
Unit
Indoor
Outdoor
Indoor
Outdoor
Cooling
Heating
Cooling
Heating
Cooling
Heating
Cooling
Heating
Indoor
Outdoor
Indoor
Outdoor
Indoor
Outdoor
Liquid
Gas
Dimensions
(W x H x D)
Item
LS-
K1860CL/CM/CN
LS-
K1860HL/HM/HN
LS-
K1820CL/CM/CN
LS-
K1820HL/HM/HN LS-K1863DL

- 6 -
Cooling Capacity BTU/h(kcal/h)
W
Heating Capacity BTU/h(kcal/h)
W
Moisture Removal l/h
Power Source Ø, V, Hz
Air Circulation m3/min
Noise Level dB(A)±3
Input W
Runnig Current
A
Starting Current
A
E.E.R. BTU/h-W
C.O.P W/W
Motor Output W
mm
Net. Weight kg
Refrigerant(R-22) g
Airflow Direction Control (Up & Down)
Airflow Direction Control (Right & Left)
Negative lon
Air Purifying Filter
Plasma Filter
Deicer
Hot Start
Chaos Wind
Micom Dry
Timer
Self Diagnosis
Remocon type
Service valve
Sleeping Operation
Drain Hose
Connecting Cable
Power Cord
18,000(4,536)
5,274
-
-
2.5
1Ø, 220-240V, 50Hz
12
42
39
53
1,900
-
8.8
-
52
-
9.5
-
20
62
1,080 x 314 x 181
870 x 655 x 320
12
57
820
YES
YES
YES
YES
NO
NO
NO
YES
YES
24hr ON/OFF
YES
L.C.D Wireless
1/4"(6.35)
1/2"(12.7)
YES
YES
1.5mm2
1.5mm2
18,000(4,536)
5,274
19,000(4,788)
5,564
2.5
1Ø, 220-240V, 50Hz
12
42
39
53
1,950
1,950
8.7
8.7
53
53
9.2
2.86
20
62
1,080 x 314 x 181
870 x 655 x 320
12
59
1,270
YES
YES
YES
YES
NO
YES
YES
YES
YES
24hr ON/OFF
YES
L.C.D Wireless
1/4"(6.35)
1/2"(12.7)
YES
YES
1.5, 0.75mm2
1.5mm2
18,000(4,536)
5,274
19,000(4,788)
5,564
2.5
1Ø, 220-240V, 50Hz
12
42
39
53
1,950
1,950
9.2
9.2
53
53
9.2
2.86
20
62
1,080 x 314 x 181
870 x 655 x 320
12
59
1,470
YES
NO
NO
NO(OPTION)
NO
YES
YES
YES
YES
24hr ON/OFF
YES
L.C.D Wireless
1/4"(6.35)
1/2"(12.7)
YES
YES
1.5, 0.75mm2
1.5mm2
18,000(4,536)
5,274
19,000(4,788)
5,564
2.5
1Ø, 220-240V, 50Hz
12
42
39
53
1,950
1,950
9.2
9.2
53
53
9.2
2.86
20
62
1,080 x 314 x 181
870 x 655 x 320
12
59
1,470
YES
NO
NO
NO(OPTION)
YES
YES
YES
YES
YES
24hr ON/OFF
YES
L.C.D Wireless
1/4"(6.35)
1/2"(12.7)
YES
YES
1.5, 0.75mm2
1.5mm2
Model Name
Unit
Indoor
Outdoor
Indoor
Outdoor
Cooling
Heating
Cooling
Heating
Cooling
Heating
Cooling
Heating
Indoor
Outdoor
Indoor
Outdoor
Indoor
Outdoor
Liquid
Gas
Dimensions
(W x H x D)
Item
LS-
K1861CL/CM/CN LS- K1865HL/HM/HN LS-
K1866HL/HM/HN
LS-
K1861HL/HM/HN

- 7 -
Cooling Capacity BTU/h(kcal/h)
W
Heating Capacity BTU/h(kcal/h)
W
Moisture Removal l/h
Power Source Ø, V, Hz
Air Circulation m3/min
Noise Level dB(A)
Input W
Runnig Current A
Starting Current
A
E.E.R. BTU/h-W
C.O.P W/W
Motor Output W
mm
Net. Weight kg
Refrigerant(R-22) g
Airflow Direction Control (Up & Down)
Airflow Direction Control (Right & Left)
Negative lon
Air Purifying Filter
Deicer
Hot Start
Chaos Wind
Micom Dry
Timer
Self Diagnosis
Remocon type
Service valve
Sleeping Operation
Drain Hose
Connecting Cable
Power Cord
24,000(6,048)
7,032
-
-
2.5
1Ø, 220-240V, 50Hz
16
42
44
54
2,470
-
11.3
-
52
-
9.7
-
35
83
1,080 x 314x 181
870 x 655 x 320
12
57
1,520
YES
NO
NO
NO(OPTION)
NO
NO
YES
YES
24hr ON/OFF
YES
L.C.D Wireless
3/8"(9.52)
5/8"(15.88)
YES
YES
2.5mm2
2.5mm2
24,000(6,048)
7,032
24,000(6,040)
7,032
2.5
1Ø, 220-240V, 50Hz
16
42
44
54
2,670
2,610
12.2
11.9
53
53
9.0
2.635
35
83
1,080 x 314 x 181
870 x 655 x 320
12
59
1,300
YES
NO
NO
NO(OPTION)
YES
YES
YES
YES
24hr ON/OFF
YES
L.C.D Wireless
3/8"(9.52)
5/8"(15.88)
YES
YES
2.5, 0.75mm2
2.5mm2
24,000(6,048)
7,032
-
-
3.5
1Ø, 220V, 60Hz
15.5
48
42±3
54±3
2,100
-
9.8
-
61
-
10.5
-
35
78
1,080 x 314 x 181
870 x 655 x 320
12
58
1,580
YES
NO
NO
NO(OPTION)
NO
NO
YES
YES
24hr ON/OFF
YES
L.C.D Wireless
1/4"(6.35)
5/8"(15.88)
YES
YES
2.5mm2
2.5mm2
24,000(6,048)
7,032
24,000(6,048)
7,032
3.5
1Ø, 220V, 60Hz
16
48
44±3
55±3
2,525
2,525
12.0
12.0
70
70
9.5
2.78
35
78
1,080 x 314 x 181
870 x 655 x 320
12
65
1,610
YES
NO
NO
NO(OPTION)
YES
YES
YES
YES
24hr ON/OFF
YES
L.C.D Wireless
1/4"(6.35)
5/8"(15.88)
YES
YES
2.5, 0.75mm2
2.5mm2
Model Name
Unit
Indoor
Outdoor
Indoor
Outdoor
Cooling
Heating
Cooling
Heating
Cooling
Heating
Cooling
Heating
Indoor
Outdoor
Indoor
Outdoor
Indoor
Outdoor
Liquid
Gas
Dimensions
(W x H x D)
Item
LS-
K2460CL/CM/CN LS- K2460HL/HM/HN LS-
K2420CL/CM/CN LS- K2420HL/HM/HN

- 8 -
Cooling Capacity BTU/h(kcal/h)
W
Heating Capacity BTU/h(kcal/h)
W
Moisture Removal l/h
Power Source Ø, V, Hz
Air Circulation m3/min
Noise Level dB(A)
Input W
Runnig Current A
Starting Current
A
E.E.R. BTU/h-W
C.O.P W/W
Motor Output W
mm
Net. Weight kg
Refrigerant(R-22) g
Airflow Direction Control (Up & Down)
Airflow Direction Control (Right & Left)
Negative lon
Air Purifying Filter
Deicer
Hot Start
Chaos Wind
Micom Dry
Timer
Self Diagnosis
Remocon type
Service valve
Sleeping Operation
Drain Hose
Connecting Cable
Power Cord
26,000
7,032
-
-
2.5
1Ø, 220-240V, 50Hz
16
42
44
54
2,470
-
11.3
-
52
-
9.7
-
35
83
1,080 x 314 x 181
870 x 655 x 320
12
57
1,520
YES
YES
YES
YES
NO
NO
YES
YES
24hr ON/OFF
YES
L.C.D Wireless
3/8"(9.52)
5/8"(15.88)
YES
YES
2.5mm2
2.5mm2
26,000
7,032
24,000(6,040)
7,032
2.5
1Ø, 220-240V, 50Hz
16
42
44
54
2,670
2,610
12.2
11.9
53
53
9.0
2.635
35
83
1,080 x 314 x 181
870 x 655 x 320
12
59
1,300
YES
YES
YES
YES
YES
YES
YES
YES
24hr ON/OFF
YES
L.C.D Wireless
3/8"(9.52)
5/8"(15.88)
YES
YES
2.5, 0.75mm2
2.5mm2
26,000
7,032
-
-
3.5
1Ø, 220V, 60Hz
15.5
48
42±3
54±3
2,100
-
9.8
-
61
-
10.5
-
35
78
1,080 x 314 x 181
870 x 655 x 320
12
58
1,580
YES
YES
YES
YES
NO
NO
YES
YES
24hr ON/OFF
YES
L.C.D Wireless
1/4"(6.35)
5/8"(15.88)
YES
YES
2.5mm2
2.5mm2
26,000
7,032
24,000(6,048)
7,032
3.5
1Ø, 220V, 60Hz
16
48
44±3
55±3
2,525
2,525
12.0
12.0
70
70
9.5
2.78
35
78
1,080 x 314 x 181
870 x 655 x 320
12
65
1,610
YES
YES
YES
YES
YES
YES
YES
YES
24hr ON/OFF
YES
L.C.D Wireless
1/4"(6.35)
5/8"(15.88)
YES
YES
2.5, 0.75mm2
2.5mm2
Model Name
Unit
Indoor
Outdoor
Indoor
Outdoor
Cooling
Heating
Cooling
Heating
Cooling
Heating
Cooling
Heating
Indoor
Outdoor
Indoor
Outdoor
Indoor
Outdoor
Liquid
Gas
Dimensions
(W x H x D)
Item
LS-
K2661CL/CM/CN LS- K2661HL/HM/HN LS-
K2621CL/CM/CN LS- K2621HL/HM/HN

- 9 -
Cooling Capacity BTU/h(kcal/h)
W
Heating Capacity BTU/h(kcal/h)
W
Moisture Removal l/h
Power Source Ø, V, Hz
Air Circulation m3/min
Noise Level dB(A)±3
Input W
Runnig Current A
Starting Current
A
E.E.R. BTU/h-W
C.O.P W/W
Motor Output W
mm
Net. Weight kg
Refrigerant(R-22) g
Airflow Direction Control (Up & Down)
Airflow Direction Control (Right & Left)
Negative lon
Air Purifying Filter
Plasma Filter
Soft Start
Deicer
Hot Start
Chaos Wind
Micom Dry
Timer
Self Diagnosis
Remocon type
Service valve
Sleeping Operation
Drain Hose
Connecting Cable
Power Cord
18,000(4,536)
5,274
-
-
2.5
1Ø, 220-240V, 50Hz
12
42
39
53
1,900
-
8.8
-
52
-
9.5
-
20
62
1,080 x 314 x 181
870 x 655 x 320
12
57
820
YES
NO
NO
YES
YES
NO
NO
NO
YES
YES
24hr ON/OFF
YES
L.C.D Wireless
1/4"(6.35)
1/2"(12.7)
YES
YES
1.5mm2
1.5mm2
18,000(4,536)
5,274
19,000(4,788)
5,564
2.5
1Ø, 220-240V, 50Hz
12
42
39
53
1,950
1,950
8.7
8.7
53
53
9.2
2.86
20
62
1,080 x 314 x 181
870 x 655 x 320
12
59
1,270
YES
NO
NO
YES
YES
NO
YES
YES
YES
YES
24hr ON/OFF
YES
L.C.D Wireless
1/4"(6.35)
1/2"(12.7)
YES
YES
1.5, 0.75mm2
1.5mm2
24,000(6,048)
7,032
-
-
2.5
1Ø, 220-240V, 50Hz
16
42
44
54
2,470
-
11.3
-
52
-
9.7
-
35
83
1,080 x 314 x 181
870 x 655 x 320
12
57
1,520
YES
NO
NO
YES
YES
NO
NO
NO
YES
YES
24hr ON/OFF
YES
L.C.D Wireless
3/8"(9.52)
5/8"(15.88)
YES
YES
2.5mm2
2.5mm2
24,000(6,048)
7,032
24,000(6,048)
7,032
2.5
1Ø, 220-240V, 50Hz
16
42
44
54
2,670
2,610
12.2
11.9
53
53
9.0
2.635
35
83
1,080 x 314 x 181
870 x 655 x 320
12
59
1,550
YES
NO
NO
YES
YES
NO
YES
YES
YES
YES
24hr ON/OFF
YES
L.C.D Wireless
3/8"(9.52)
5/8"(15.88)
YES
YES
2.5, 0.75mm2
2.5mm2
Model Name
Unit
Indoor
Outdoor
Indoor
Outdoor
Cooling
Heating
Cooling
Heating
Cooling
Heating
Cooling
Heating
Indoor
Outdoor
Indoor
Outdoor
Indoor
Outdoor
Liquid
Gas
Dimensions
(W x H x D)
Item
LS-
K1862CL/CM/CN LS- K1862HL/HM/HN LS-
K2462CL/CM/CN LS- K2462HL/HM/CN

- 10 -
Cooling Capacity BTU/h(kcal/h)
W
Heating Capacity BTU/h(kcal/h)
W
Moisture Removal l/h
Power Source Ø, V, Hz
Air Circulation m3/min
Noise Level dB(A)
Input W
Runnig Current A
Starting Current
A
E.E.R. BTU/h-W
C.O.P W/W
Motor Output W
mm
Net. Weight kg
Refrigerant(R-22) g
Airflow Direction Control (Up & Down)
Airflow Direction Control (Right & Left)
Negative lon
Air Purifying Filter
Deicer
Hot Start
Chaos Wind
Micom Dry
Timer
Self Diagnosis
Remocon type
Service valve
Sleeping Operation
Drain Hose
Connecting Cable
Power Cord
24,000(6,048)
7,032
-
-
3.5
1Ø, 220V, 60Hz
15.5
48
42±3
54±3
2,100
-
9.8
-
61
-
10.5
-
35
78
1,080 x 314 x 181
870 x 655 x 320
12
58
1,580
YES
NO
NO
YES
NO
NO
YES
YES
24hr ON/OFF
YES
L.C.D Wireless
1/4"(6.35)
5/8"(15.88)
YES
YES
2.5mm2
2.5mm2
24,000(6,048)
7,032
24,000(6,048)
7,032
3.5
1Ø, 220V, 60Hz
16
48
44±3
55±3
2,525
2,525
12.0
12.0
70
70
9.5
2.78
35
78
1,080 x 314 x 181
870 x 655 x 320
12
65
1,610
YES
NO
NO
YES
YES
YES
YES
YES
24hr ON/OFF
YES
L.C.D Wireless
1/4"(6.35)
5/8"(15.88)
YES
YES
2.5, 0.75mm2
2.5mm2
18,000(4,536)
5,274
-
-
2.5
1Ø, 220V, 60Hz
14
42
40
51
1,900
-
8.9
-
52
-
9.47
-
21
60
1,080 x 314 x 181
870 x 655 x 320
12
57
870
YES
NO
NO
YES
NO
NO
YES
YES
24hr ON/OFF
YES
L.C.D Wireless
1/4"(6.35)
5/8"(15.88)
YES
YES
1.5mm2
1.5mm2
18,000(4,536)
5,274
19,000(4,788)
5,564
2.5
1Ø, 220V, 60Hz
14
42
40
51
1,800
1,900
8.5
8.9
52
52
10.0
2.93
21
60
1,080 x 314 x 181
870 x 655 x 320
12
58
1,360
YES
NO
NO
YES
YES
YES
YES
YES
24hr ON/OFF
YES
L.C.D Wireless
1/4"(6.35)
5/8"(15.88)
YES
YES
1.5, 0.75mm2
1.5mm2
Model Name
Unit
Indoor
Outdoor
Indoor
Outdoor
Cooling
Heating
Cooling
Heating
Cooling
Heating
Cooling
Heating
Indoor
Outdoor
Indoor
Outdoor
Indoor
Outdoor
Liquid
Gas
Dimensions
(W x H x D)
Item
LS-
K2422CL/CM/CN LS- K2422HL/HM/HN LS-
K1822CL/CM/CN LS- K1822HL/HM/HN