LG LM-2422C2L User manual

Multi Type Room
Air Conditioner
SERVICE MANUAL
MODEL: LM-2422C2L
LM-2422A2L/A3L
LM-3620C2L/C2M/A2L
LM-3622A2L
LM-3625C3L/A3L
LM-3626A3L
LM-4822C3L
LM-4822A3L

Functions...................................................................................................................................... 3
Product Specifications................................................................................................................ 5
Dimensions................................................................................................................................... 9
Refrigeration Cycle Diagram..................................................................................................... 13
Wiring Diagram .......................................................................................................................... 17
Operation Details ....................................................................................................................... 20
Display Function........................................................................................................................ 27
Self-diagnosis Function ............................................................................................................ 27
Installation.................................................................................................................................. 28
Operation.................................................................................................................................... 42
Disassembly of the parts (Indoor Unit).................................................................................... 44
2-way, 3-way Valve ..................................................................................................................... 46
Cycle Troubleshooting Guide ....................................................................................................50
Electronic Parts Troubleshooting Guide.................................................................................. 51
Electronic Control Device ......................................................................................................... 58
Schematic Diagram.................................................................................................................... 61
Exploded View and Replacement Parts List............................................................................ 66
- 2 -
Contents

- 3 -
Functions
• 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, Chaos
--- Lights up in operation
--- Lights up in Sleep Mode
--- Lights up in Timer Mode
--- Lights up in Deice Mode(for Heat pump model)
--- 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)
OUT
DOOR
Health Dehumidification Operation
• Both the indoor and outdoor fan
stops during deicing.
• Hot start after deice ends.
• The indoor fan stops until the
evaporator piping temperature will be
reached at 22°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
17,000(4,270) 24,000(6,050)
1.6 1.6 x 2
1Ø, 220, 60HZ
9.0
49
38+1
56+1
2,260 2,410
10.5 11.5
7.5 9.96
14.4
90
888 x 287 x 170
870 x 655 x 320
9
61
1,650(at 7.5m)
O
L.C.D Wireless
1/4"(6.35)
1/2"(12.7)
O
O
0.75mm2
2.5mm2
Operation A or B unit A + B unit
Unit
Indoor
Outdoor
Indoor
Outdoor
Indoor
Outdoor
Indoor
Outdoor
Indoor
Outdoor
Liquid
Gas
Item
Cooling Capacity Btu/h(kcal/h)
Moisture Removal /h
Power Source ø, V, Hz
Air Circulation m3/min
Noise Level(Low) dB(A)
Input W
Runnig Current A
E.E.R. Btu/h.w
Motor Output W
Dimensions(W x H x D) mm
Net. Weight kg
Refrigerant(R-22) g
Airflow Direction Control(Up & Down)
Remocon Type
Service Valve
Drain Hose
Plasma Filter
Connecting Cable
Power Cord
1. LM-2422C2L, LM-2422A2L

- 6 -
17,800(4,486) 35,600(8,972)
2.0 2.0 x 2
1Ø, 220, 60HZ
13.1
58
40
57
1,900 3,650
8.7 16.8
9.4 9.8
21
90
1,080 x314 x 181
870 x 800 x 320
11
71
A: 820, B: 820 (at 7.5m)
O
L.C.D Wireless
1/4"(6.35)
5/8"(15.88)
O
LM-3622A2L only
1.5mm2
3.5mm2
Operation A or B unit A + B unit
Unit
Indoor
Outdoor
Indoor
Outdoor
Indoor
Outdoor
Indoor
Outdoor
Indoor
Outdoor
Liquid
Gas
Item
Cooling Capacity Btu/h(kcal/h)
Moisture Removal /h
Power Source ø, V, Hz
Air Circulation m3/min
Noise Level(Low) dB(A)
Input W
Runnig Current A
E.E.R. Btu/h.w
Motor Output W
Dimensions(W x H x D) mm
Net. Weight kg
Refrigerant(R-22) g
Airflow Direction Control(Up & Down)
Remocon Type
Service Valve
Drain Hose
Plasma Filter
Connecting Cable
Power Cord
2. LM-3620C2L, LM-3620A2L, LM-3622A2L

- 7 -
12,000(3,024) 13,000(3,276) 25,000(6,300) 23,800(5,998) 35,800(9,022)
1.4 1.5 2.9 2.5 3.9
1Ø, 220V, 60Hz
Indoor 9.0 9.5 9.0 + 9.5 9 + 9 9.0 x 3
Outdoor 58 - - - -
Indoor 37 38 - - -
Outdoor 57
1,300 2,100 3,200 2,400 3,600
5.7 9.3 13.6 10.1 14.8
9.2 6.2 7.8 9.9 9.9
Indoor 14.4 x 3
Outdoor 90
Indoor 888 x 287 x 170
Outdoor 870 x 800 x 320
Indoor 9 - - -
Outdoor 71
A: 550, B: 1,100 (at 7.5m)
O
L.C.D Wireless
Liquid 1/4"(6.35)
Gas 1/2"(12.7)
O
LM-3626A3L only
0.75mm2
3.5mm2
Operation A-Unit
B or C-Unit A+B or C B+C A+B+C
Unit
Item
Cooling Capacity Btu/h(kcal/h)
Moisture Removal /h
Power Source ø, V, Hz
Air Circulation m3/min
Noise Level(Low) dB(A)
Input W
Runnig Current A
E.E.R. Btu/h.w
Motor Output W
Dimensions(W x H x D) mm
Net. Weight kg
Refrigerant(R-22) g
Airflow Direction Control(Up & Down)
Remocon Type
Service Valve
Drain Hose
Plasma Filter
Connecting Cable
Power Cord
3. LM-3625C3L/A3L, LM-3626A3L

- 8 -
24,000(6,048) 16,000(4,032) 40,000(10,080) 24,000(6,048)
48,000(12,096)
2.5 2.2 4.8 3.4 6.5
1Ø, 220V, 60Hz
Indoor 14.5 9.0 14.5 + 9.0 8.2 + 8.2
14.5 + 8.2 + 8.2
Outdoor 106
Indoor 47/44/40 42/40/38 - - -
Outdoor 60
2,500 2,300 4,500 2,500 4,700
11.0 10.5 20.0 11.0 21.0
9.6 7.0 8.9 9.6 10.6
Indoor 22 14.4
Outdoor 80 x 2
Indoor
1,180 x 314 x 181 888 x 287 x 170
Outdoor 1,225 x 900 370
Indoor 11 9 - - -
Outdoor 106
1,570 1,300 - - -
O
L.C.D Wireless
Liquid 3/8"(9.52) 1/4"(6.35) ---
Gas 5/8"(15.88) 1/2"(12.7) ---
O
LM-4822C3L/A3L only
0.75mm2
5.5mm2
Operation A-Unit
B or C-Unit A+B or C B+C A+B+C
Unit
Item
Cooling Capacity Btu/h(kcal/h)
Moisture Removal /h
Power Source ø, V, Hz
Air Circulation m3/min
Noise Level(Low) dB(A)
Input W
Runnig Current A
E.E.R. Btu/h.w
Motor Output W
Dimensions(W x H x D) mm
Net. Weight kg
Refrigerant(R-22) g
Airflow Direction Control(Up & Down)
Remocon Type
Service Valve
Drain Hose
Plasma Filter
Connecting Cable
Power Cord
4. LM-4822C3L, LM-4822A3L

1. Indoor Unit
- 9 -
Dimensions
Installation plate
Installation plate
Right rear piping
Left rear piping
ø70mm ø70mm
50mm
20mm
20mm
80mm
A
A
ø70mm
Center
Center
ø70mm
Left rear piping Right rear piping
A
A
D
H
W
Tubing hole cover
W mm 802 888 1,080
H mm 262 287 314
D mm 165 170 181
4.5K, 6K, 7K, 8K, 9K
Btu Series 9K, 10K, 12K Btu
Series 18K, 24K Btu
MODEL
DIM
( 4.5K, 6K, 7K, 8K, 9K )
( 4.5K, 6K, 7K, 8K, 9K )
( 9K, 10K, 12K, 18K, 24K )
( 9K, 10K, 12K, 18K, 24K )

- 10 -
2. Outdoor Unit
2-1. LM-2422C2L, LM-2422A2L, LM-3622A2L, LM-3620C2L, LM-3620A2L
W
D
L1
L2
L9
L4 L3
H
L10L10L10
L8
Gas side
3-Way valve
Liquid side
2-Way valve
L7L5L6
W mm 870 870
H mm 655 800
D mm 320 320
L1 mm 370 370
L2 mm 25 25
L3 mm 630 775
L4 mm 25 25
L5 mm 546 546
L6 mm 160 160
L7 mm 160 160
L8 mm 64 64
L9 mm 76.5 76.5
L10 mm 50 50
LM-2422C2L, LM-2422A2L LM-3620C2L, LM-3622A2L, LM-3620A2L
MODEL
DIM