LG LT-E1820CL User manual
Contents
Functions .................................................................................................................................3
Product Specifications (Cooling & Heating)..........................................................................5
Dimensions ..............................................................................................................................7
Refrigeration Cycle Diagram ..................................................................................................9
Wiring Diagram ......................................................................................................................11
Operation Details ...................................................................................................................12
Installation of Indoor, Outdoor Unit .....................................................................................13
3-way Valve ............................................................................................................................31
Cycle Troubleshooting Guide ...............................................................................................36
Electronic Parts Troubleshooting Guide .............................................................................37
Electronic Control Device .....................................................................................................40
Schematic Diagram ...............................................................................................................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
Airflow Direction Control
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.
Compact and light design • To install a unit is very convenient size because of smaller
than fextile size. ( 600 x 600 )
Low noise • The most advanced low-noise design.
• The adoption of turbo fan and round type heat exchanger
give the quietest operation.
Long life filter • Long life type(wrinkle) and wastable and anti-bacteria filter
is adopted.
Plasma Air Purifying Filter(2HL Only)
High head height Drain pump • Built-in drain pump automatically drains water.
• A standard drain-head height of up to 700mm is possible.
High-Ceilingcorresponding Function • According to the height of ceiling, the RPM of indoor fan
motor is selectable to increase air reaching distance.
Central Control(Optional) •
It is operating individually or totally by central control function.
Group Control(Optional Wiring) •
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.
• Jet, High, Med, Low
• Intermittent operation of fan at low speed.
• The louver can be set at swing up and down automatically.
• 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 JET 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°CDown to 16°C
Up to 30°C
Model
1, 220-240, 50
4,536(5,274)
18,000
-
-
1,900
-
9.5
-
53
-
2.39
-
13
50
1.9
O
X
4
O
O
O
O
O
4
O
X
O
O
O
O
Optional
O
X
1,900
570 x 570 x 269
670 x 670 x 30
870 x 655 x 320
19(16.5+2.5)
60
14:3*2.5
18:4*0.75
1/4(6.35mm)
5/8(15.88mm)
50
30
FoamPE/5mm
ø25/32
1, 220-240, 50
4,536(5,274)
18,000
4,536(5,274)
18,000
2,050
1,850
9.5
9.0
53
53
2.21
2.85
13
50
1.9
O
O
4
O
O
O
O
O
4
O
O
O
O
O
O
Optional
O
X
1,800
570 x 570 x 269
670 x 670 x 30
870 x 655 x 320
19(16.5+2.5)
61
14:3*2.5
18:6*0.75
1/4(6.35mm)
5/8(15.88mm)
50
30
FoamPE/5mm
ø25/32
1, 220-240, 50
4,536(5,274)
18,000
4,536(5,274)
18,000
2,050
1,850
9.5
9.0
53
53
2.21
2.85
13
50
1.9
O
O
4
O
O
O
O
O
4
O
O
O
O
O
O
Optional
O
O
1,800
570 x 570 x 269
670 x 670 x 30
870 x 655 x 320
19(16.5+2.5)
61
14:3*2.5
18:6*0.75
1/4(6.35mm)
5/8(15.88mm)
50
30
FoamPE/5mm
ø25/32
1, 220, 60
4,536(5,274)
18,000
-
-
1,970
-
9
-
53
-
2.30
-
13
50
1.9
O
X
4
O
O
O
O
O
4
O
X
O
O
O
O
Optional
O
X
1,050
570 x 570 x 269
670 x 670 x 30
870 x 655 x 320
19
60
14:3*2.5
18:4*0.75
1/4(6.35mm)
5/8(15.88mm)
50
30
FoamPE/5mm
ø25/32
1, 220, 60
4,536(5,274)
18,000
4,536(5,274)
18,000
1,900
1,900
8.8
8.8
53
53
2.39
2.78
13
50
1.9
O
O
4
O
O
O
O
O
4
O
O
O
O
O
O
Optional
O
X
1,910
570 x 570 x 269
670 x 670 x 30
870 x 655 x 320
19
61
14:3*2.5
18:6*0.75
1/4(6.35mm)
5/8(15.88mm)
50
30
FoamPE/5mm
ø25/32
LT-E1860CL LT-E1860HL LT-E1862HL LT-E1820CL LT-E1820HL
Power Supply ø, V, Hz
Capacity Cooling kcal/h(W)
Btu/h
Heating kcal/h(W)
Btu/h
Input Cooling W
Heating W
Running Current Cooling A
Heating A
Starting Current Cooling A
Heating A
E.E.R kcal/h(W)
C.O.P W/W
Air Circulation Indoor m3/min
Outdoor m3/min
Moisture Removal l/ h
Air-Flow Direction Control
Heating Operation Mode
Fan Speeds (steps)
Auto Operation (Changeover)
Forced Operation
Jet Cool
Soft Dry Operation
Timer Delay Safety Function
Feature Air Deflection (Way)
Self Diagnosis
Hot start
Auto Restart
Air refresh (Hole)
High Ceiling
Group Control (Optional wiring)
Central Control
Wired remote controller (with weekly Program)
Plasma A/Cleaner
Refrigerant(R-22) Charge g
Dimensions Indoor mm
(W x D x H) Panel mm
Outdoor mm
Net Weight Indoor kg
Outdoor kg
Main Power Cord AWG#:P*mm2
Connection Cable AWG#:P*mm2
Service Valve Liquid (inch)
Gas (inch)
Installation Pipe Length (m)
Elevation (m)
Insulation(material/thickness)
Drain Hose(I.D/O.D) mm
Product Specifications (Cooling & Heating)
–5–
–6–
Power Supply ø, V, Hz
Capacity Cooling kcal/h(W)
Btu/h
Heating kcal/h(W)
Btu/h
Input Cooling W
Heating W
Running Current Cooling A
Heating A
Starting Current Cooling A
Heating A
E.E.R kcal/h(W)
C.O.P W/W
Air Circulation Indoor m3/min
Outdoor m3/min
Moisture Removal l/ h
Air-Flow Direction Control
Heating Operation Mode
Fan Speeds (steps)
Auto Operation (Changeover)
Forced Operation
Jet Cool
Soft Dry Operation
Timer Delay Safety Function
Feature Air Deflection (Way)
Self Diagnosis
Hot start
Auto Restart
Air refresh (Hole)
High Ceiling
Group Control (Optional wiring)
Central Control
Wired remote controller (with weekly Program)
Plasma A/Cleaner
Refrigerant(R-22) Charge g
Dimensions Indoor mm
(W x D x H) Panel mm
Outdoor mm
Net Weight Indoor kg
Outdoor kg
Main Power Cord AWG#:P*mm2
Connection Cable AWG#:P*mm2
Service Valve Liquid (inch)
Gas (inch)
Installation Pipe Length (m)
Elevation (m)
Insulation(material/thickness)
Drain Hose(I.D/O.D) mm
1, 220-240, 50
5,871(6,827)
23,300
-
-
2,600
-
13.5
-
62
-
2.26
-
15.5
50
2.9
O
X
4
O
O
O
O
O
4
O
X
O
O
O
O
Optional
O
X
1,900
570 x 570 x 269
670 x 670 x 30
870 x 655 x 320
19(16.5+2.5)
61
14:3*2.5
18:4*0.75
1/4(6.35mm)
5/8(15.88mm)
50
30
FoamPE/5mm
ø25/32
1, 220-240, 50
5,871(6,827)
23,300
5,922(6,886)
23,500
2,600
2,600
13.5
13.5
62
60
2.26
2.65
15.5
50
2.9
O
O
4
O
O
O
O
O
4
O
O
O
O
O
O
Optional
O
X
1,900
570 x 570 x 269
670 x 670 x 30
870 x 655 x 320
19(16.5+2.5)
62
14:3*2.5
18:6*0.75
1/4(6.35mm)
5/8(15.88mm)
50
30
FoamPE/5mm
ø25/32
1, 220-240, 50
5,871(6,827)
23,300
5,922(6,886)
23,500
2,600
2,600
13.5
13.5
62
60
2.26
2.65
15.5
50
2.9
O
O
4
O
O
O
O
O
4
O
O
O
O
O
O
Optional
O
O
1,900
570 x 570 x 269
670 x 670 x 30
870 x 655 x 320
19(16.5+2.5)
62
14:3*2.5
18:6*0.75
1/4(6.35mm)
5/8(15.88mm)
50
30
FoamPE/5mm
ø25/32
Model
LT-E2460CL LT-E2460HL LT-E2462HL
Dimensions
–7–
269
67055
570
269
190.5
160
52
90
90
120.4 30 521
670
570
450
40
110 110
670
670
CLOSE OPEN OPEN CLOSE
(1) Indoor Unit
(2) Outdoor Unit
–8–
Gas side
3-way valve
Liquid side
3-way valve
W
L6L7 L8 L9
L4
L11
L10
D
L1
L2
L5 L3
MODEL
DIM
W mm 870
H mm 655
D mm 320
L1 mm 370
L2 mm 25
L3 mm 340
L4 mm 630
L5 mm 25
L6 mm 546
L7 mm 162
L8 mm 162
L9 mm 54
L10 mm 74.5
L11 mm 79
All Models
Refrigeration Cycle Diagram
• HEAT PUMP
•Rated performance for refrigerant line length of: 7.5m
•If 18K Capacity is installed at a distance of 15m, 187.5g of refrigerant
should be added ....................................................(15-7.5)x25g
–9–
INDOOR UNIT
H/EX Liquid SideLiquid SideGas Side
COMPRESSOR
VALVE REVERSING
ACCUM. H/EX
Gas SideGas SideLiquid Side
CAPI C1
CAPI A
CAPI B
Heating Cooring
CAPI C2
(
OUTDOOR UNIT
Capacity
18K 1/4" 3/8"
7.
550
24K 1/4" 3/8"
7.5 50
GAS LIQUID
530 25
530 30
Elevation (m)
Length (m) * Additional
refrigerant
(g/m)
Pipe Size
Rated Rated
Max. Max.
–10–
•COOLING ONLY
•Rated performance for refrigerant line length of: 7.5m
•If 18K Capacity is installed at a distance of 15m, 187.5g of refrigerant
should be added ....................................................(15-7.5)x25g
INDOOR UNIT
H/EX
Liquid SideLiquid SideLiquid Side
COMPRESSOR
ACCUM.
H/EX
Gas SideGas SideGas Side
CAPI C1
CAPI A
CAPI B
CAPI C2
OUTDOOR UNIT
Capacity
18K 1/4" 3/8"
7.
550
24K 1/4" 3/8"
7.
550
GAS LIQUID
530 25
530 30
Elevation (m)
Length (m) * Additional
refrigerant
(g/m)
Pipe Size
Rated Rated
Max. Max.
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