LG LT-E1820CL User guide
Ceiling Cassette Air Conditioner
SVC MANUAL(Exploded View)
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
MODEL : LT-E1820CL/LT-E1820HL
LT-E1860CL/LT-E1860HL
LT-E1860AA
LT-E1862HL/BA
LT-E2460CL/LT-E2460HL
LT-E2460BL
LT-E2462HL/LT-E2462CL/BA
LT-E2460AA
LT-C182ELE0/LT-H182ELE0
LT-H246ELE0/ELF0
LT-C246ELE0/ELF0
Contents
Functions .................................................................................................................................3
Product Specifications (Cooling & Heating)..........................................................................7
Dimensions ..............................................................................................................................9
Refrigeration Cycle Diagram ................................................................................................12
Wiring Diagram ......................................................................................................................14
Operation Details ...................................................................................................................17
Installation of Indoor, Outdoor Unit .....................................................................................20
Cycle .......................................................................................................................................38
Cycle Troubleshooting Guide ...............................................................................................41
Electronic Parts Troubleshooting Guide .............................................................................42
Electronic Control Device .....................................................................................................45
Schematic Digram ..................................................................................................................46
Exploded View ........................................................................................................................47
- 2 -
Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Functions
- 3 -
Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
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
Hot-start Control (Heating)
• The indoor fan stops until the evaporator piping temperature will be reached at 28°C.
Compact and light design
• To install a unit is very convenient because of smaller size
than textile. ( 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 wrinkle(type) and washable and anti-bacteria filter
is adopted.
Plasma Air Purifying Filter(2HL Only)
High head Drain pump
• Built-in drain pump automatically drains water.
• A standard drain-head height of up to 700mm is possible.
High-Ceiling corresponding Function
• According to the height of ceiling, the RPM of indoor fan
motor is selected to increase air reaching distance.
Central Control(Optional)
•
It is operating individually or totally by central control function.
Group Control(Optional Wiring)
Elevation Grille (Optional)
•
Each controller can control 16 units and 8 controllers can be
connected.
•
It operates maximum 16 units by only one wired remote controller and each unit starts sequentially to prevent overcurrent.
• Auto Elevation Grille is automatically down to height of max 3m.
So it enables to install the indoor unit at high celling space and
Auto Elevation Grille makes you clean the filter easily.
• 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 automatically previous operation mode after power supply.
• The setting temperature and desired operation mode are automatically set by fuzzy logic.
• Both the indoor and outdoor fan stops during defrosting.
• Hot start after defrost ends.
- 4 -
Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
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°C
Down to 16°C
Up to 30°C
- 5 -
Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
■ ELEVATION GRILL (REMOTE CONTROLLER_Accessory)
• How to Use Remote Controller
• Main Components of Lift Grill
As for operation of Remote Controller, use it by directing the transmitter part of Remote Controller to the receiver part of front panel
directly under front panel.
• Do not drop it down or into water. Or else there is worry about
trouble failure.
• Do not press hard the Remote Controller button with nail (ballpoint pen or other sharp substance). Or else there is worry
about trouble failure.
• In case when obstacle such as curtain hides the signal reception
part of receiver in between the space interval, Remote Controller
operation is infeasible.
➀ Lift grill front panel assembly
➁ Bolts for installation (4 EA, P/No. 3A00255K)
➂ Instruction manual
➃ Remote Controller for lift grill
Ascend
Signal transmitter
Descend
Stop
- 6 -
Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Automatic stop distance
✳
If you want to change automatic distance setting,
consult with your sale agency.
Automatic Stop Distance of Grill
Ceiling height Low
Medium
High
(
Height: 3~4 m)
Automatic stop distance
1.5±0.5 m 2.5±0.5 m 3.5±0.5 m
- Depress the down button( ).
Then suction grill descends and stops automatically at a certain
distance.
- You may stop it at wanted distance point by depressing the stop button ( ) when descending.
- Depress the up button( ).
Then suction grill goes up and enters into the front panel.
1. Stop the Air Conditioner Operation
2. Descend the Suction Grill
3. Raise the Suction Grill
- Depress the stop button( ).
Make use of this when you want to stop it at your wished position.
4. Stop the Suction Grill during Rising
• Always stop the air conditioner operation for safety before operating lift grill.
• Take heed _ there is worry about dust fall etc. when suction grill descends.
• In case when the set automatic stop distance goes wrong, check the set value of operation panel and con-
firm if there is neither obstacle nor mankind.
• When you are not to remove obstacle, stop the operation before touching the obstacle.
• How to Operate the Lift Grill
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
O
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
-
-
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-E2460AA LT-E1860CL LT-E1860HL
LT-E1862HL
LT-E1862BA
LT-E1820CL
LT-C182ELE0
LT-E1820HL
LT-H182ELE0
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 m
3
/min
Outdoor m
3
/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*mm
2
Connection Cable AWG#:P*mm
2
Service Valve Liquid (inch)
Gas (inch)
Installation Pipe Length (m)
Elevation (m)
Insulation(material/thickness)
Drain Hose(I.D/O.D) mm
- 7 -
Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Product Specifications (Cooling & Heating)
- 8 -
Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
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 m
3
/min
Outdoor m
3
/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*mm
2
Connection Cable AWG#:P*mm
2
Service Valve Liquid (inch)
Gas (inch)
Installation Pipe Length (m)
Elevation (m)
Insulation(material/thickness)
Drain Hose(I.D/O.D) mm
Model
LT-E2460CL
LT-C246ELE0
LT-E2460HL LT-E2460BL
LT-E2462HL/BL
LT-H246ELE0/ELF0
LT-E2462CL
LT-E2460AA
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
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
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
O
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
18:6*0.75
1/4(6.35mm)
5/8(15.88mm)
50
30
FoamPE/5mm
ø25/32
- 9 -
Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Dimensions
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
- 10 -
Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
LT-H***ELE0
LT-H***FLE0
LT-H***DLE0
W
D
H
W mm 670 850 950
Hmm909090
D mm 670 850 950
(unit : mm)
Model
LT-H***ELE0 LT-H***FLE0 LT-H***DLE0
DIM
Unit
- 11 -
Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
(2) Outdoor Unit
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
- 12 -
Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
INDOOR UNIT
H/EX
Liquid SideGas Side
COMPRESSOR
VALVE REVERSING
ACCUM.
H/EX
Gas SideLiquid Side
CAPI C1
CAPI A
CAPI B
Heating Cooring
CAPI C2
(
OUTDOOR UNIT
GAS LIQUID
Elevation (m)
Length (m)
* Additional
refrigerant
(g/m)
Pipe Size
Rated Rated
Max. Max.
Capacity
18K 5/8" 1/4"
7.
5 50 5 30 25
24K 5/8" 1/4"
7.5 50 5 30 30
- 13 -
Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
• 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 Side
COMPRESSOR
ACCUM.
H/EX
Gas SideGas Side
CAPI C1
CAPI A
CAPI B
CAPI C2
OUTDOOR UNIT
GAS LIQUID
Elevation (m)
Length (m)
* Additional
refrigerant
(g/m)
Pipe Size
Rated Rated
Max. Max.
Capacity
18K 5/8" 1/4" 7.5 50 5 30 25
24K 5/8" 1/4" 7.5 50 5 30 30
- 14 -
Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Wiring Diagram
• HEAT PUMP
Model No.: LT-E1862HL/ LT-E1862BA/ LT-E2462HL
LT-E2462BA/ LT-E2460BL/ LT-H182ELEO/LT-H246ELE0/LT-H246ELF0
LT-E2460HL(Australia only)
OUTDOOR WIRING DIAGRAM INDOOR WIRING DIAGRAM
COMP
R
S
H
42861
0
CF
BL
YL
OR
BK
TB2
BR
BR
BR
BR
BL
BL
BL
BL
BL
GN/YL
GN/YL
BK
BK
RD
CAPACITOR
REVERSING
VALVE
RD
C
POWER
RELAY
FAN
MOTOR
FUSE 5A
FUSE 5A
POWER
INPUT
TO INDOOR UNIT
TERMINAL
BLOCK
1(L)2(N
)
3(L)4(N
)
5
6
7
8
INDOOR
MOTOR
DRAIN
PUMP
STEP
MOTOR
TEMP.
THERMISTOR
PIPE
THERMISTOR
REMOTE
CONTROL
FLOAT S/W
CN - DISP
DISPLAY PCB
Only for LT-Exxx2HL
AIR
CLEANER
H.V. ASSY
DOOR S/W
TERMINAL
BLOCK
TO OUTDOOR UNIT
BR
YL
BK
OR
BL
BL
BR
GN/YL
RD
BK
YL
BL
GN
/
YL
OUT FAN
COMP
4 WAY
RD
BK
WH
RD
BK
3
(
L
)
4
(
N
)
5 6 7
FUSE T3.15A
OUTDOOR WIRING DIAGRAM
COMP
R
S
H
42861
0
CF
BL
YL
YL
WH
YL
OR
BK
TB2
BR
BR
BR
BR
BL
BL
BL
BL
BL
BL
GN/YL
GN/YL
BK
BK
RD
CAPACITOR
S/CAPACITOR
REVERSING
VALVE
RD
C
POWER
RELAY
FAN
MOTOR
FUSE 5A
FUSE 5A
POWER
INPUT
TO INDOOR UNIT
TERMINAL
BLOCK
3854A20119A
1(L)2(N
)
3(L)4(N
)
5
6
7
8
3
RYCOMP
RYS/CAPA
CN-POWER
434
• HEAT PUMP
Model No.: LT-E1860HL/ LT-E2460HL/
- 15 -
Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
OUTDOOR WIRING DIAGRAM INDOOR WIRING DIAGRAM
INDOOR
MOTOR
DRAIN
PUMP
STEP
MOTOR
TEMP.
THERMISTOR
PIPE
THERMISTOR
REMOTE
CONTROL
FLOAT S/W
CN - DISP
DISPLAY PCB
Only for LT-Exxx2HL
AIR
CLEANER
H.V. ASSY
DOOR S/W
TERMINAL
BLOCK
TO OUTDOOR UNIT
BR
YL
BK
OR
BL
BL
BR
GN/YL
RD
BK
YL
BL
GN
/
YL
OUT FAN
COMP
4 WAY
RD
BK
WH
RD
BK
3
(
L
)
4
(
N
)
5 6 7
FUSE T3.15A
- 16 -
Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
• COOLING ONLY
Model No.: LT-E1860CL/LT-E1860AA/LT-C182ELE0
Model No.: LT-E2460CL/LT-E2462CL/LT-E2460AA/LT-C246ELE0
OUTDOOR WIRING DIAGRAM INDOOR WIRING DIAGRAM
INDOOR
MOTOR
DRAIN
PUMP
STEP
MOTOR
TEMP.
THERMISTOR
PIPE
THERMISTOR
REMOTE
CONTROL
FLOAT S/W
CN - DISP
DISPLAY PCB
TERMINAL
BLOCK
TO OUTDOOR UNIT
BR
YL
BK
OR
BL
BL
BR
GN/YL
RD
BL
GN
/
YL
COMP
3
(
L
)
4
(
N
)
5 6 7
FUSE T3.15A
OUTDOOR WIRING DIAGRAM INDOOR WIRING DIAGRAM
INDOOR
MOTOR
DRAIN
PUMP
STEP
MOTOR
TEMP.
THERMISTOR
PIPE
THERMISTOR
REMOTE
CONTROL
FLOAT S/W
CN - DISP
DISPLAY PCB
LT-E
***
2
HL ONLY
AIR
CLEANER
H.V. ASSY
DOOR S/W
TERMINAL
BLOCK
TO OUTDOOR UNIT
BR
YL
BK
OR
BL
BL
BR
GN/YL
RD
YL
BL
GN
/
YL
COMP
RD
BK
WH
RD
BK
3(L) 4(N)
5 6 7
FUSE T3.15A
OUT FAN
COMP
R
S
H
42861
0
CF
BL
YL
OR
BK
TB2
BR
BR
BR
BR
BL
BL
BL
BL
BL
GN/YL
GN/YL
BK
RD
CAPACITOR
RD
C
POWER
RELAY
FAN
MOTOR
FUSE 5A
FUSE 5A
POWER
INPUT
TO INDOOR UNIT
TERMINAL
BLOCK
1(L)2(N
)
3(L)4(N
)
5
6
7
8
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