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Multi Type Room Air Conditioner
SVC MANUAL
MODEL : TM-1830C2L
TM-1830H2L
TM-2430C2L
TM-2430H2L
CAUTION
Before Servicing the unit, read the safety precautions in General SVC manual.
Only for authorized service personnel.
Contents
Functions ...................................................................................................................................... 3
Product Specifications ................................................................................................................ 5
Dimensions................................................................................................................................... 9
Refrigeration Cycle Diagram..................................................................................................... 11
Wiring Diagram .......................................................................................................................... 12
Operation Details ....................................................................................................................... 13
Display Function ........................................................................................................................ 20
Self-diagnosis Function ............................................................................................................ 20
Installation .................................................................................................................................. 21
Operation .................................................................................................................................... 35
Disassembly of the parts (Indoor Unit) .................................................................................... 37
2-way, 3-way Valve ..................................................................................................................... 39
Cycle Troubleshooting Guide ....................................................................................................43
Electronic Parts Troubleshooting Guide.................................................................................. 44
Electronic Control Device ......................................................................................................... 51
Schematic Diagram.................................................................................................................... 54
Exploded View ........................................................................................................................... 56
Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Functions
Indoor Unit
Operation ON/OFF by Remote controller
Sensing the Room Temperature
• Room temperature sensor. (THERMISTOR)
Room temperature control
• Maintains the room temperature in accordance with the Setting Temp.
Starting Current Control
• Indoor fan is delayed for 5 seconds at the starting.
Time Delay Safety Control
• Restarting is inhibited for approx. 3 minutes.
Indoor Fan Speed Control
• High, Med, Low, Chaos
Operation indication Lamps (LED)
OUT
DOOR
--- 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)
Health Dehumidification Operation
• Intermittent operation of fan at low speed.
Sleep Mode Auto Control
• The fan is switched to low(Cooling), med(Heating) speed.
• The unit will be stopped after 1, 2, 3, 4, 5, 6, 7 hours.
Natural Air Control by CHAOS Logic
• The fan is switched to intermittent or irregular operation
• The fan speed is automatically switched from high to low speed.
Airflow Direction Control
• The louver can be set at the desired position or swing up and down automatically.
Deice (defrost) control (Heating)
• Both the indoor and outdoor fan stops during deicing.
• Hot start after deice ends.
Hot-start Control (Heating)
• The indoor fan stops until the evaporator piping temperature will be reached at 28°C (82.4°F).
- 3 -
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
(Cooling model only)
(Heating model only)
Cooling Operation Mode.( )
Healthy Dehumidification Operation Mode.( )
Auto Operation Mode.( )
Heating Operation Mode.( )
Fan Speed Selection
(Low) (Med) (High) (CHAOS)
Room, Temperature Display
: High: 39
°C(102˚F)
Temperature Setting
TEMPERATURE
HIGH LOW
Cooling
LOW : 11
°C(52˚F)
Down to 18
°C(64˚F)
Up to 30
°C(86˚F)
Heating
Down to 16
°C(60˚F)
Up to 30
°C(86˚F)
JET COOL
Setting the Time or Timer
Timer Selection
ON OFF
: OFF, ON, OFF
Timer Setting
SET
ON
Timer Cancel
CANCEL
: Cancel Sleep Mode, Timer ON or Timer OFF
Sleep Operation
: 1, 2, 3, 4, 5, 6, 7, Off Timer
Airflow Direction Control
˚C To ˚F Swtiching Button
˚C / ˚F
Fan Operation Mode
Reset
: Fan Operates without cooling or heating.
Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 4 -
LGE Internal Use Only
Product Specifications
1. TM-1830C2L
Item
Cooling Capacity
Heating Capacity
Moisture Removal
Power Source
Operation
Unit
Btu/h(kcal/h)
/h
ø, V, Hz
Air Circulation /min
Noise Level
( Hi / Med / Low )
Input
Runnig
Current
E.E.R.
C.O.P.
Cooling
Heating
Cooling
Heating
Cooling
Heating
Dimensions(W x H x D) dB(A)
W
A
Btu/h.w
mm(Inch)
Net. Weight kg(lbs)
Service Valve mm(Inch)
Refrigerant(R-22) g
Airflow Direction Control(Up & Down)
Remote Controller Type
Sleeping Operation
Drain Hose
A-Unit + B-Unit
A-Unit
Only
B-Unit
Only
Remarks
Indoor
Outdoor
Indoor
Outdoor
17,000/18,000
–
2.4
8,500/9,000
1.2
1Ø, 208/230V, 60Hz
8,500/9,000
–
1.2
208/230V
– at 230V
– 7.0
–
7.0
42
39/37/35
53
39/37/35 at 230V
1,680/1,700
–
8.2/7.5
–
930/950
–
4.5/4.0
–
930/950
–
4.5/4.0
–
Indoor
Outdoor
10.1/10.6
–
9.1/9.5
–
9.1/9.5
–
802 x 262 x 165(31.6 x 10.3 x 6.5)
870 x 655 x 320(34.3 x 25.8 x 12.6)
Indoor
Outdoor
Liquid
Gas
–
7(15.4)
61(134.5)
6.35(1/4")
9.52(3/8")
780
O
L.C.D Wireless
O
O
780
208/230V at 7.5m
Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 5 -
LGE Internal Use Only
2. TM-1830H2L
Item
Cooling Capacity
Heating Capacity
Moisture Removal
Power Source
Operation
Unit
Btu/h(kcal/h)
/h
ø, V, Hz
Air Circulation /min dB(A) Noise Level
( Hi / Med / Low )
Input
Runnig
Current
E.E.R.
C.O.P.
Cooling
Heating
Cooling
Heating
Cooling
Heating
Dimensions(W x H x D)
W
A
Btu/h.w
mm(Inch)
Net. Weight kg(lbs)
Service Valve mm(Inch)
Refrigerant(R-22) g
Airflow Direction Control(Up & Down)
Remote Controller Type
Sleeping Operation
Drain Hose
A-Unit + B-Unit
A-Unit
Only
B-Unit
Only
Remarks
Indoor
Outdoor
Indoor
Outdoor
17,000/18,000
17,000/18,000
2.4
8,500/9,000
8,500/9,000
1.2
1Ø, 208/230V, 60Hz
8,500/9,000
8,500/9,000
1.2
–
208/230V at 230V
7.0/7.6
Cooling/Heating
–
7.0/7.6
42
39/37/35
53
39/37/35 at 230V
1,680/1,700
1,680/1,700
8.2/7.5
8.2/7.5
930/950
930/950
4.5/4.0
4.5/4.0
930/950
930/950
4.5/4.0
4.5/4.0
Indoor
Outdoor
10.1/10.6
2.97/3.10
9.1/9.5
2.68/2.78
9.1/9.5
2.68/2.78
802 x 262 x 165(31.6 x 10.3 x 6.5)
870 x 655 x 320(34.3 x 25.8 x 12.6)
Indoor
Outdoor
Liquid
Gas
–
7(15.4)
63(134.5)
6.35(1/4")
9.52(3/8")
780
O
L.C.D Wireless
O
O
780
208/230V at 7.5m
Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 6 -
LGE Internal Use Only
3. TM-2430C2L
Item
Cooling Capacity
Heating Capacity
Moisture Removal
Power Source
Operation
Unit
Btu/h(kcal/h)
/h
ø, V, Hz
Air Circulation /min
Noise Level
( Hi / Med / Low )
Input
Runnig
Current
E.E.R.
C.O.P.
Cooling
Heating
Cooling
Heating
Cooling
Heating
Dimensions(W x H x D) dB(A)
W
A
Btu/h.w
mm(Inch)
Net. Weight kg(lbs)
Service Valve mm(Inch)
Refrigerant(R-22) g
Airflow Direction Control(Up & Down)
Remote Controller Type
Sleeping Operation
Drain Hose
A-Unit + B-Unit
A-Unit
Only
B-Unit
Only
Remarks
Indoor
Outdoor
Indoor
Outdoor
23,600/24,000
–
3.4
11,800/12,000 11,800/12,000
–
1.7
1Ø, 208/230V, 60Hz
–
1.7
208/230V at 230V
– 8.0
–
8.0
42
40/38/36
54
40/38/36 at 230V
2,400/2,400
–
11.0/10.0
–
1,300/1,300 1,300/1,300
– –
6.2/5.7
–
6.2/5.7
–
Indoor
Outdoor
9.8/10.0
–
9.1/9.2
–
9.1/9.2
–
888 x 287 x 170(35 x 11.3 x 6.7)
870 x 655 x 320(34.3 x 25.8 x 12.6)
Indoor
Outdoor
Liquid
Gas
–
9(19.8)
63(138.9)
6.35(1/4")
12.7(1/2")
880
O
L.C.D Wireless
O
O
880
208/230V at 7.5m
Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 7 -
LGE Internal Use Only
4. TM-2430H2L
Item
Cooling Capacity
Heating Capacity
Moisture Removal
Power Source
Operation
Unit
Btu/h(kcal/h)
/h
ø, V, Hz
Air Circulation /min
Noise Level
( Hi / Med / Low )
Input
Runnig
Current
E.E.R.
C.O.P.
Cooling
Heating
Cooling
Heating
Cooling
Heating
Dimensions(W x H x D) dB(A)
W
A
Btu/h.w
mm(Inch)
Net. Weight kg(lbs)
Service Valve mm(Inch)
Refrigerant(R-22) g
Airflow Direction Control(Up & Down)
Remote Controller Type
Sleeping Operation
Drain Hose
A-Unit + B-Unit
A-Unit
Only
B-Unit
Only
Remarks
Indoor
Outdoor
Indoor
Outdoor
23,600/24,000
23,600/24,000
3.4
11,800/12,000 11,800/12,000
11,800/12,000 11,800/12,000
1.7
1Ø, 208/230V, 60Hz
1.7
–
208/230V at 230V
8.0/8.6
Cooling/Heating
–
8.0/8.6
42
40/38/36
54
40/38/36 at 230V
2,400/2,400
2,400/2,400
11.0/10.0
11.0/10.0
1,300/1,300 1,300/1,300
1,300/1,300 1,300/1,300
6.2/5.7
6.2/5.7
6.2/5.7
6.2/5.7
Indoor
Outdoor
9.8/10.0
2.89/2.93
9.1/9.2
2.66/2.70
9.1/9.2
2.66/2.70
888 x 287 x 170(35 x 11.3 x 6.7)
870 x 655 x 320(34.3 x 25.8 x 12.6)
Indoor
Outdoor
Liquid
Gas
–
9(19.8)
63(138.9)
6.35(1/4")
12.7(1/2")
880
O
L.C.D Wireless
O
O
880
208/230V at 7.5m
Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 8 -
LGE Internal Use Only
Dimensions
1. Indoor Unit
D
H
W
Installation plate
Tubing hole cover
Installation plate
Left rear piping
80mm(3.15")
Right rear piping
Left rear piping
A
Center
A A
Right rear piping
A
Center
DIM
W
H
D
ø70mm(2.76")
50mm(1.97")
ø70mm(2.76")
( TM-1830C2L, TM-1830H2L )
MODEL mm(Inch) mm(Inch) mm(Inch)
ø70mm(2.76")
TM-1830C2L, TM-1830H2L
802(31.6)
262(10.3)
165(6.5)
ø70mm(2.76")
( TM-2430C2L, TM-2430H2L )
TM-2430C2L, TM-2430H2L
888(35)
287(11.3)
170(6.7)
Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 9 -
LGE Internal Use Only
2. Outdoor Unit
W
Gas side
3-Way valve
Liquid side
2-Way valve
L6 L5 L7 L8
MODEL
DIM
W mm(Inch)
H mm(Inch)
D mm(Inch)
L1 mm(Inch)
L2 mm(Inch)
L3 mm(Inch)
L4 mm(Inch)
L5 mm(Inch)
L6 mm(Inch)
L7 mm(Inch)
L8 mm(Inch)
L9 mm(Inch)
L10 mm(Inch)
TM-1830C2L, TM-1830H2L, TM-2430C2L, TM-2430H2L
870(34.3)
655(25.8)
320(12.6)
370(14.6)
25(1.0)
630(24.8)
25(1.0)
546(21.5)
160(6.3)
160(6.3)
64(2.5)
76.5(3.0)
50(2.0)
Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 10 -
LGE Internal Use Only
Refrigeration Cycle Diagram
1. TM-1830C2L, TM-2430C2L (Cooling only models)
HEAT
EXCHANGER
(EVAPORATOR)
A-UNIT B-UNIT
LIQUID SIDE
2-WAY VALVE
CAPILLARY TUBE
GAS SIDE
3-WAY VALVE
HEAT
EXCHANGER
(CONDENSER)
COMPRESSOR
B
COMPRESSOR
A
2. TM-1830H2L, TM-2430H2L (Cooling & Heating modes)
Indoor Unit Outdoor Unit
COMPRESSOR-A
COOLING
HEATING
DEICE
4-WAY
VALVE
HEAT
EXCHANGER
A-UNIT B-UNIT
3-WAY
VALVE
4-WAY
VALVE
COMPRESSOR-B
HEAT
EXCHANGER
CAPILLARY TUBE
2-WAY
VALVE
CAPILLARY TUBE
Btu/h
18K
24K
Pipe Size (Diameter : inch)
Gas
3/8"
1/2"
Liquid
1/4"
1/4"
Max.
piping length
(m)
15(590.6")
15(590.6")
Max.
piping elevation
(m)
8(314.9")
8(314.9")
Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 11 -
ex)
Capillary
Cooling & Deice
LGE Internal Use Only
Wiring Diagram
1. INDOOR UNIT: TM-1830C2L, TM-1830H2L, TM-2430C2L, TM-2430H2L
MOTOR
FORCED
OPERATION
AUTO
RESTART
REMOTE
CONTROL
THERMISTOR
2. OUTDOOR UNIT
• TM-1830C2L
• TM-2430C2L
BK
T/B1
BK
BK
CAPACITOR
H
RD BK
S
"A"
COMP
R
C
C
MOTOR
BK
OR
YL
OR
F
C
R
BR
"B"
COMP
YL
S
TRANS-
FORMER
BL
4
3
RD
4
3
BK
CN-SV
BK
MAIN DC
PCB ASSY
WH WH
L1
BK
GN/YL
CN-POWER
YL
FUSE T3.15A
MAIN AC PCB ASSY
CN-COMP1
CN-COMP2
BK BL BK BL
WH
BK
RD
BK BR BL
C G V S
OR BK BR BL
C G V S
PILLAR
TERMINAL
L2
TO INDOOR UNIT
MAIN
POWER
C G V S
RD BK BR BL
A INDOOR
C G V S
RD BK BR BL
B INDOOR
OUTDOOR WIRING DIAGRAM 3854A20075L
STEP
MOTOR
MAIN PCB ASSY
CN-DISP1
DISPLAY PCB ASSY
C G V S
PILLAR
TERMINAL
INDOOR WIRING DIAGRAM
TO OUTDOOR UNIT
3854A20075M
• TM-1830H2L
• TM-2430H2L
BK T/B1
BK
BK
BK
CAPACITOR
H
RD BK
R
S
"A"
COMP
C
C
MOTOR
BK
OR
YL
OR
F
C
R
BR
"B"
COMP
YL
S
BK
BK BK
BK BK
BK BL YL
TRANS-
FORMER
BL
4
3
RD
4
3
CN-SV
CN-TH1
MAIN DC
PCB ASSY
WH WH
L1
BK
GN/YL
CN-POWER
YL
FUSE T3.15A
MAIN AC PCB ASSY
CN-COMP1 CN-COMP2
BK
BL BK
BL
WH
BK
RD
BK BR BL
C G V S
OR BK
C G
BR BL
V S
PILLAR
TERMINAL
L2
TO INDOOR UNIT
MAIN
POWER
C G V S
RD BK BR BL
A INDOOR
C G V S
RD BK BR BL
B INDOOR
OUTDOOR WIRING DIAGRAM 3854A20075K
Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 12 -
LGE Internal Use Only
Operation Details
1. MAIN UNIT FUNCTION
• DISPLAY
1) C/O Model
Operation Indicator
• On while in appliance operation, off while in appliance pause
• Flashing while in disconnection or short in Thermistor (3 sec off / 0.5 sec on)
Sleep Timer Indicator
• On while in sleep timer mode, off when sleep timer cancel or appliance operation pause
Timer Indicator
• On while in timer mode (on/off), off when timer mode is completed or canceled.
Comp. Running Incidator
• While in appliance operation, on while in outdoor unit compressor running, off while in compressor off
2) H/P Model
Operation Indicator
• On while in appliance operation, off while in appliance pause
• Flashing while in disconnection or short in Thermistor (3 sec off / 0.5 sec on)
Sleep Timer Indicator
• On while in sleep timer mode, off when sleep timer cancel or appliance operation pause
Timer Indicator
• On while in timer mode (on/off), off when timer mode is completed or canceled
Defrost Indicator
• Off except when hot start during heating mode operation or while in defrost control
■ Cooling Mode Operation
• When the intake air temperature reaches 0.5°C(0.9°F) below the setting temp, the compressor and the outdoor fan stop.
• When it reaches 0.5°C(0.9°F) above the setting temp, they start to operate again.
Compressor ON Temp
➲ Setting Temp+0.5°C(+0.9°F)
Compressor OFF Temp
➲ Setting Temp-0.5°C(-0.9°F)
• While in compressor running, operating with the airflow speed set by the remote control. While in compressor not running, operating with the low airflow speed regardless of the setting.
■ Healthy Dehumidification Mode
• When the dehumidification operation input by the remote control is received, the intake air temperature is detected and the setting temp is automatically set according to the intake air temperature.
26°C(78.8°F)
≤ Intake Air Temp ➲ 25°C(77°F)
24°C(75.2°F)
≤ Intake Intake Air Temp<26°C(78.8°F) ➲ Intake Air Temp-1°C(-1.8°F)
18°C(64.4°F)
≤ Intake Intake Air Temp<24°C(75.2°F) ➲ Intake Air Temp-0.5°C(-0.9°F)
Intake Air Temp<18°C(64.4°F)
➲ 18°C(64.4°F)
Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 13 -
LGE Internal Use Only
• While in compressor off, the indoor fan repeats low airflow speed and pause.
• While the intake air temp is between compressor on temp. and compressor off temp., 10-min dehumidification operation and 4-min compressor off repeat.
Compressor ON Temp.
➲ Setting Temp+0.5°C(+0.9°F)
Compressor OFF Temp.
➲ Setting Temp-0.5°C(-0.9°F)
• In 10-min dehumidification operation, the indoor fan operates with the low airflow speed.
■ Heating Mode Operation(H/P model)
• When the intake air temp reaches +3°C(+5.4°F)…above the setting temp, the compressor is turned off.
When below the setting temp, the compressor is turned on.
Compressor ON Temp.
➲ Setting Temp.
Compressor OFF Temp.
➲ Setting Temp.+3°C(+5.4°F)
• While in compressor on, the indoor fan is off when the indoor pipe temp. is below 20°C(68°F), when above
28°C(82.4°F) , it operates with the low or setting airflow speed. When the indoor pipe temp is between
20°C(68°F) and 28°C(82.4°F), it operates with Super-Low(while in sleep mode, with the medium airflow speed).
• While in compressor off, the indoor fan is off when the indoor pipe temp is below 33°C(91.4°F), when above
35°C(95°F) , it operates with the low airflow speed.
• If overloaded while in heating mode operation, in order to prevent the compressor from OLP operation, the outdoor fan is turned on/off according to the indoor pipe temp.
• While in defrost control, both of the indoor and outdoor fans are turned off.
■ Defrost Control(H/P model)
• Defrost operation is controlled by timer and sensing temperature of outdoor pipe.
• The first defrost starts only when the outdoor pipe temperature falls below -6°C(21.2°F) after 45 minutes passed from starting of heating operation and more than 10 minutes operation of compressor.
• Defrost ends after 9/6 minutes passed from starting of defrost operation or after the outdoor fan operates within max. 2 minutes 30 seconds when the outdoor pipe temperature rises over 12°C(53.6°F) even it before
12 minutes.
• The second defrost starts only when the outdoor pipe temperature falls below -6°C(21.2°F) after 45 minutes passed from ending of the first defrost and more than 10 minutes operation of compressor.
■ Heating overload(H/P models)
• Outdoor fan ON/OFF by sensing outdoor pipe temperature.
• Outdoor fan is OFF if pipe temperature is over 6.5°C(43.7°F) and outdoor fan is ON if pipe temperature is below 0°C(32°F).
• Outdoor fan is off if any one part is heating overload condition.
Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 14 -
LGE Internal Use Only
■ Fuzzy Operation (C/O Model)
• According to the temperature set by Fuzzy rule, when the intake air temp is 0.5°C(0.9°F) or more below the setting temp, the compressor is turned off. When 0.5°C(0.9°F) or more above the setting temp, the compressor is turned on.
Compressor ON Temp
Compressor OFF Temp
➲ Setting Temp + 0.5°C(+ 0.9°F)
➲ Setting Temp + 0.5°C(+ 0.9°F)
• At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to the intake air temp at that time.
26°C(78.8°F)
≤ Intake Air Temp ➲ 25°C(77°F)
24°C(75.2°F)
≤ Intake Air Temp < 26°C(78.8°F) ➲ Intake Air Temp + 1°C(+ 1.8°F)
22°C(71.6°F)
≤ Intake Air Temp < 24°C(75.2°F) ➲ Intake Air Temp + 0.5°C(+ 0.9°F)
18°C(64.4°F)
≤ Intake Air Temp < 22°C(71.6°F) ➲ Intake Air Temp
Intake Air Temp<18°C(64.4°F)
➲ 18°C(64.4°F)
• When the Fuzzy key (Temperature Control key) is input after the initial setting temperature is selected, the Fuzzy key value and the intake air temperature at that time are compared to select the setting temperature automatically according to the Fuzzy rule.
• While in Fuzzy operation, the airflow speed of the indoor fan is automatically selected according to the temperature.
■ Fuzzy Operation (H/P Model)
• When any of operation mode is not selected like the moment of the power on or when 3 hrs has passed since the operation off, the operation mode is selected.
• When determining the operation mode, the compressor, the outdoor fan, and the 4 way valve are off and only the indoor fan is operated for 15 seconds. Then an operation mode is selected according to the intake air temp at that moment as follows.
24°C(75.2°F)
21°C(69.8°F)
≤ Inatake Air Temp
≤ Inatake Air Temp<24°C(75.2°F)
Inatake Air Temp<21°C(69.8°F)
➲ Fuzzy Operation for Cooling
➲ Fuzzy Operation for Dehumidification
➲ Fuzzy Operation for Heating
• If any of the operation modes among cooling / dehumidification / heating mode operations is carried out for 10 sec or longer before Fuzzy operation, the mode before Fuzzy operation is operated.
1) Fuzzy Operation for Cooling
• According to the setting temperature selected by Fuzzy rule, when the intake air temp is 0.5°C(0.9°F) or more below the setting temp, the compressor is turned off. When 0.5°C(0.9°F) or more above the setting temp, the compressor is turned on.
Compressor ON Temp
Compressor OFF Temp
➲ Setting Temp + 0.5°C(+ 0.9°F)
➲ Setting Temp + 0.5°C(+ 0.9°F)
• At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to the intake air temp at that time.
26°C(78.8°F)
24°C(75.2°F)
22°C(71.6°F)
18°C(64.4°F)
≤ Intake Air Temp
≤ Intake Air Temp<26°C(78.8°F)
≤ Intake Air Temp<24°C(75.2°F)
≤ Intake Air Temp<22°C(71.6°F)
Intake Air Temp<18°C(64.4°F)
➲ 25°C(77°F)
➲ Intake Air Temp + 1°C(+ 1.8°F)
➲ Intake Air Temp + 0.5°C(+ 0.9°F)
➲ Intake Air Temp
➲ 18°C(64.4°F)
• When the Fuzzy key (Temperature Control key) is input after the initial setting temperature is selected, the Fuzzy key value and the intake air temperature at that time are compared to select the setting temperature automatically according to the Fuzzy rule.
• While in Fuzzy operation, the airflow speed of the indoor fan is automatically selected according to the temperature.
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LGE Internal Use Only
2) Fuzzy Operation for Dehumidification
• According to the setting temperature selected by Fuzzy rule, when the intake air temp is 0.5°C(0.9°F) or more below the setting temp, the compressor is turned off. When 0.5°C(0.9°F) or more above the setting temp, the compressor is turned on.
Compressor ON Temp
Compressor OFF Temp
➲ Setting Temp + 0.5°C(+ 0.9°F)
➲ Setting Temp + 0.5°C(+ 0.9°F)
• At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to the intake air temp at that time.
26°C(78.8°F)
≤ Intake Air Temp
24°C(75.2°F)
≤ Intake Air Temp<26°C(78.8°F)
Intake Air Temp<18°C(64.4°F)
➲ 25°C(77°F)
➲ Intake Air Temp + 1°C(+ 1.8°F)
22°C(71.6°F)
≤ Intake Air Temp<24°C(75.2°F) ➲ Intake Air Temp + 0.5°C(+ 0.9°F)
18°C(64.4°F)
≤ Intake Air Temp<22°C(71.6°F) ➲ Intake Air Temp
➲ 18°C(64.4°F)
• When the Fuzzy key (Temperature Control key) is input after the initial setting temperature is selected, the Fuzzy key value and the intake air temperature at that time are compared to select the setting temperature automatically according to the Fuzzy rule.
• While in Fuzzy operation, the airflow speed of the indoor fan repeats the low airflow speed or pause as in dehumidification operation.
3) Fuzzy Operation for Heating
• According to the setting temperature selected by Fuzzy rule, when the intake air temp is 3°C(5.4°F) or more above the setting temp, the compressor is turned off. When below the setting temp, the compressor is turned on.
Compressor ON Temp
Compressor OFF Temp
➲ Setting Temp
➲ Setting Temp + 3°C(+ 5.4°F)
• At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to the intake air temp at that time.
20°C(68°F)
≤Intake Air Temp
Intake Air Temp <20°C(68°F)
➲ Intake Air Temp + 0.5°C(+ 0.9°F)
➲ 20°C(68°F)
• When the Fuzzy key (Temperature Control key) is input after the initial setting temperature is selected, the Fuzzy key value and the intake air temperature at that time are compared to select the setting temperature automatically according to the Fuzzy rule.
• While in Fuzzy operation, the airflow speed of the indoor fan is set to the high or the medium according to the intake air temperature and the setting temperature.
■ Airflow Speed Selection
• The airflow speed of the indoor fan is set to high, medium, low, or chaos (auto) by the input of the airflow speed selection key on the remote control.
■ On-Timer Operation
• When the set time is reached after the time is input by the remote control, the appliance starts to operate.
• The timer LED is on when the on-timer is input. It is off when the time set by the timer is reached.
• If the appliance is operating at the time set by the timer, the operation continues.
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■ Off-Timer Operation
• When the set time is reached after the time is input by the remote control, the appliance stops operating.
• The timer LED is on when the off-timer is input. It is off when the time set by the timer is reached.
• If the appliance is on pause at the time set by the timer, the pause continues.
■ Off-Timer <=> On-Timer Operation
• When the set time is reached after the on/off time is input by the remote control, the on/off-timer operation is carried out according to the set time.
■ Sleep Timer Operation
• When the sleep time is reached after <1,2,3,4,5,6,7,0(cancel) hr> is input by the remote control while in appliance operation, the operation of the appliance stops.
• While the appliance is on pause, the sleep timer mode cannot be input.
• While in cooling mode operation, 30 min later since the start of the sleep timer, the setting temperature increases by 1°C(1.8°F). After another 30 min elapse, it increases by 1°C(1.8°F) again.
• When the sleep timer mode is input while in cooling cycle mode, the airflow speed of the indoor fan is set to the low.
• When the sleep timer mode is input while in heating cycle mode, the airflow speed of the indoor fan is set to the medium.
■ Chaos Swing Mode
• By the Chaos Swing key input, the upper/lower vane automatically operates with the Chaos Swing or they are fixed to the desired direction.
• While in Chaos Swing mode, the angles of cooling and heating cycle operations are different.
■ Chaos Natural Wind Mode
• When the Chaos Natural Wind mode is selected and then operated, the high, medium, or low speed of the airflow mode is operated for 2~15 sec. randomly by the Chaos Simulation.
■ Jet Cool Mode Operation (C/O Model)
• If the Jet Cool key is input at any operation mode while in appliance operation, the Jet Cool mode operates.
• In the Jet Cool mode, the indoor fan is operated at super-high speed for 30 min at cooling mode operation.
• In the Jet Cool mode operation, the room temperature is controlled to the setting temperature, 18°C(64.4°F)
• When the sleep timer mode is input while in the Jet Cool mode operation, the Jet Cool mode has the priority.
• When the Jet Cool key is input, the upper/lower vanes are reset to those of the initial cooling mode and then operated in order that the air outflow could reach further.
■ Jet Cool Mode Operation (H/P Model)
• While in heating mode or Fuzzy operation, the Jet Cool key cannot be input. When it is input while in the other mode operation (cooling, dehumidification, ventilation), the Jet Cool mode is operated.
• In the Jet Cool mode, the indoor fan is operated at super-high speed for 30 min at cooling mode operation.
• In the Jet Cool mode operation, the room temperature is controlled to the setting temperature, 18°C(64.4°F).
• When the sleep timer mode is input while in the Jet Cool mode operation, the Jet Cool mode has the priority.
• When the Jet Cool key is input, the upper/lower vanes are reset to those of the initial cooling mode and then operated in order that the air outflow could reach further.
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LGE Internal Use Only
■ Auto Restarting Operation
• When the power is restored after a sudden power failure while in appliance operation, the mode before the power failure is kept on the memory and the appliance automatically operates in the mode on the memory.
• The slide switch on the main unit of the appliance should be on the Auto Restarting position in order that the
Auto Restarting operation is available.
• Operation Mode that is kept on the memory
- State of Operation ON/OFF
- Operation Mode/Setting Temp/Selected Airflow Speed
- Sleep Timer Mode/Remaining Time of Sleep Timer (unit of hour)
FORCED
OPERATION
AUTO
RESTART
REMOTE
CONTROL
Slide Switch
■ Forced Operation (C/O Model)
• To operate the appliance by force in case that the remote control is lost, the forced operation selection switch is on the main unit of the appliance to operate the appliance in the standard conditions.
• When the power is supplied while the slide switch is on the forced operation position, or when the slide switch position is switched to the Auto Restarting position (or test operation) or switched from the remote control position to the forced operation position while the power is on, the forced operation is carried out.
• When the slide switch position is switched from the forced operation position to the Auto Restarting position or the remote control position, the forced operation is canceled and the appliance stops operating.
• The forced operation is carried out in cooling mode with the setting temperature 22°C(71.6°F) and the high speed of airflow.
• While in forced operation, the key input by the remote control has no effect and the buzzer sounds 10 times to indicate the forced operation.
■ Forced Operation (H/P Model)
• To operate the appliance by force in case that the remote control is lost, the forced operation selection switch is on the main unit of the appliance to operate the appliance in the standard conditions.
• When the power is supplied while the slide switch is on the forced operation position, or when the slide switch position is switched to the Auto Restarting (or test operation) position or switched from the remote control position to the forced operation position while the power is on, the forced operation is carried out.
• When the slide switch position is switched from the forced operation position to the Auto Restarting position or the remote control position, the forced operation is canceled and the appliance stops operating.
• The forced operation is carried out in cooling mode with the setting temperature 22°C(71.6°F) and the high speed of airflow.
• In the forced operation mode, the indoor fan is operated at low speed for around 15 sec and then the operation condition is set according to the intake air temperature as follows.
24°C(75.2°F)
≤Intake Air Temp ➲ Cooling Mode Operation, 22°C(71.6°F), High Speed
21°C(69.8°F)
≤Intake Air Temp<24°C(75.2°F) ➲ Dehumidification Operation, 23°C(73.4°F), High Speed
Intake Air Temp<21°C(69.8°F)
➲ Heating Mode Operation, 24°C(75.2°F), High Speed
• While in forced operation, the key input by the remote control has no effect and the buzzer sounds 10 times to indicate the forced operation.
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LGE Internal Use Only
■ Remote Control Operation Mode
• When the remote control is selected by the slide switch on the main unit, the appliance operates according to the input by the remote control.
■ Protection of the evaporator pipe from frosting
• If the indoor pipe temp is below 0°C(32°F) in 7 min. after the compressor operates without any pause while in cooling cycle operation mode, the compressor and the outdoor fan are turned off in order to protect the indoor evaporator pipe from frosting.
• When the indoor pipe temp is 7°C(44.6°F) or higher after 3 min. pause of the compressor, the compressor and the outdoor fan is turned on according to the condition of the room temperature.
■ Buzzer Sounding Operation
• When the appliance-operation key is input by the remote control, the short "beep-beep-" sounds.
• When the appliance-pause key is input by the remote control, the long "beep—" sounds.
• When a key is input by the remote control while the slide switch on the main unit of the appliance is on the forced operation position, the error sound "beep-beep-beep-beep-beep-" is made 10 times to indicate that the remote control signal cannot be received.
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LGE Internal Use Only
Display Function
1. Heating Model
Operation Indicator
• Cooling, Soft Dry, Fan, Heating
Sleep Timer Indicator
• Sleep Mode
Timer Indicator
• Timer Mode
Defrost Indicator
• Hot-start, Defrost
2. Cooling Model
Operation Indicator
• Cooling, Soft Dry, Fan
Sleep Timer Indicator
• Sleep Mode
Timer Indicator
• Timer Mode
Compressor on Indicator
OUT
DOOR
Self-diagnosis Function
■ Error Indicator
• The function is to self-diagnoisis airconditioner and express the troubles identifically if there is any trouble.
• Error mark is ON/OFF for the operation LED of evaporator body in the same manner as the following table.
• If more than two troubles occur simultaneously, primarily the highest trouble fo error code is expressed.
• After error occurrence, if error is released, error LED is also released simultaneously.
• To operate again on the occurrence of error code 12, be sure to pull out power cord and then re-insert.
• Having or not of error code is different from Model.
Error
Code
Error LED
(Indoor body operation LED)
(once)
1
2
3
5
3sec
(twice)
3sec
(3times)
3sec
3sec
(5times)
3sec
3sec
3sec
Error contents SVC check point
• Indoor suction temperature thermistor open/short.
• Indoor pipe temperature thermistor open/short.
• Indoor TH ass'y check
• Outdoor suction temperature thermistor open/short.
• Outdoor pipe temperature thermistor open/short.
• Outdoor TH ass'y check
• Abnormal operation of multi product.
(Simultanueous operation of cooling and heating)
• Resetting of remocon operating mode
• Poor communication
• Communication line/circuit check
3sec
8
• Indoor fan lock
• Check indoor fan motor and outdoor
PCB ass'y
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LGE Internal Use Only
Installation
(1) Installation of Indoor, Outdoor unit
1) Selection of the best location
1. Indoor unit
•
There should not be any heat source or steam near the unit.
• There should not be any obstacles to prevent the air circulation.
• A place where air circulation in the room will be good.
• A place where drainage can be easily obtained.
• A place where noise prevention is taken into consideration.
• Do not install the unit near the door way.
• Ensure the spaces indicated by arrows from the wall, ceiling, fence, or other obstacles.
Right
More than
5cm(2")
Front
Down right
Rear right
More than 5cm(2")
Left
Rear left
More than
5cm(2")
2. Outdoor unit
• If an awning is built over the unit to prevent direct sunlight or rain exposure, be careful that heat radiation from the condenser is not restricted.
• There should not be any animals or plants which could be affected by hot air discharged.
• Ensure the spaces indicated by arrows from the wall, ceiling, fence, or other obstacles.
More than eye-level
More than 10cm(4")
More than 10cm(4")
More than 70cm(28")
3. Piping length and the elevation
GAS
Pipe Size
LIQUID
1/2"(3/8") 1/4"
Max. piping length
A (m)
Max.
Elevation
B (m)
15(590.6") 8(314.9")
Indoor unit
B
A
Outdoor unit
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LGE Internal Use Only
2) Indoor Unit Installation
The mounting wall should be strong and solid enough to protect it from the vibration.
1. Mount the installation plate on the wall with four Type "A" screws.
(If mounting the unit on the concrete wall, consider using anchor bolts.)
• Always mount the Installation plate horizontally by aligning the marking-off line by means of the thread and a level.
Installation Plate
Type "A" screw
Weight marking-off line
Thread
2. Drill the piping hole with 70mm(2.76") dia.
holecore drill.
• Line according to the arrows marked on lower the left and the rght side of the Installation Plate.
The meeting point of the extended line is the center of the hole.
• Drill the piping hole at either the right or the left and the hole should be slightly slant to the outdoor side.
The lower left and the right side of
Installation Plate
TM-1830C2L, TM-1830H2L
Left rear piping
80mm(3.15")
Right rear piping
ø70mm(2.76")
50mm
(1.97")
TM-2430C2L, TM-2430H2L
ø70mm(2.76")
Left rear piping
A
A
Right rear piping
A A
ø70mm(2.76")
Indoor
Wall
ø70mm(2.76")
Outdoor
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LGE Internal Use Only
(2) Piping and Drainage of Indoor Unit
1) Preparation of pipings
1. Cut the pipes and the cable.
• Use the accessory piping kit or the pipes purchased locally.
• Measure the distance between the indoor and the outdoor unit.
• Cut the pipes a little longer than the measured distance.
• Cut the cable 1.5m(59.1") longer than the length of the pipe.
2. Remove burrs.
• Remove burrs from cut edges of pipes.
• Turn the pipe end toward down to avoid the metal powder entering the pipe.
Caution:
If burrs are not removed, they may cause a gas leakage.
Pipe cutter
Point down
90
Slanted Rough
Pipe
Reamer
3. Flaring the pipes.
• Insert the flare nuts, mounted on the connection ports of both indoor and outdoor unit, onto the copper pipes. Some refrgerant gas may leak, when the flare nuts are removed from the indoor unit, as some gas is charged to prevent the inside of the pipe from rusting.
• Fit the copper pipe end into the Bar of flare tool about 0~0.5mm(0~0.02") higher. (See illustration)
• Flare the pipe ends.
4. Tape the flaring portion to protect it from the dust or damages.
"A"; ø12.7 mm (1/2")
→ 0~0.5 mm(0~0.02")
ø9.52 mm (3/8")
→ 0~0.5 mm(0~0.02")
ø6.35 mm (1/4")
→ 0~0.5 mm(0~0.02")
Handle
Bar
Yoke
Bar
Cone
Copper pipe
Clamp handle
= Improper flaring =
Red arrow mark
Inclined Surface damaged
Cracked Uneven thickness
When properly flared, the internal surface flare will evenly shine and be of even thickness.
Since the flare part comes into contact with the connectors, carefully check the flare finish.
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LGE Internal Use Only
2) Connection of Pipings
1. Remove the installation plate
• Pull the two '
∆' marked portion of bottom of the chassis and pull the installation plate out of chassis.
2. Route the drain hose and the indoor tubing.
Installation plate
Pull
Pull
For left rear piping
3. Route the tubing and the drain hose straight backwards(see figure).
4. Insert the connecting cable into the indoor unit through the piping hole.
• Do not connect the cable to the indoor unit.
• Make a small loop with the cable for easy connection later.
Tubing holder
• To remove the holder, press the bottom of the chassis near the holder upwards and the tab is clear of its hole.
• Turn it clockwise approx.
90° and remove it.
Press
Pull
5. Tape the tubing, drain hose and the connecting cable. Be sure that drain hose locates at the lowest side of the bundle.
Locating at the upper side can be a reason that drain water overflows drain pan inside the unit.
Connecting cable
Gas side piping
Liquid side piping
Drain hose
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LGE Internal Use Only
6. Indoor unit installation.
• Hook the indoor unit onto the upper position of the installation plate. (Engage the two hooks of the rear top of the indoor unit with the upper edge of the installation plate.)
Ensure the hooks are properly seated on the installation plate by moving it in left and right.
Connecting cable
Drain hose
Press the lower left and right side of the unit against the Installation Plate until the hooks engage with their slots (sound click).
7. Connecting the pipings to the indoor unit.
• Align the center of the pipings and sufficiently tighten the flare nut with fingers.
• Finally, tighten the flare nut with torque wrench until the wrench clicks.
Wrench tightening the flare nut with forque wrench, ensure the direction for tightening follows the arrows on the wrench.
Pipe Size
Liquid Side (1/4")
Gas Side (3/8")
Gas Side (1/2")
Torque
1.8kg m(13ft lbs)
4.2kg m(30.3ft lbs)
5.5kg m(39.8ft lbs)
8. Wrap the insulation material around the connecting portion.
CAUTION: Take care to arrange the pipings, drain hose and cables as the right upper picture for inserting it into the indoor unit and refixing the tubing holder easily.
Indoor unit tubing Flare nut Pipings
Spanner
Plastic bands
Torque wrench
Insulation material
Wrap the insulation material around the connecting portion.
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LGE Internal Use Only
9. Set the pipings and the connecting cable to the back of the chassis with the tubing holder.
• Hook the edge of tubing holder to tap on chassis and push the bottom of tubing holder to be engaged in the bottom of chassis.
Drain hose
Piping
Taping
Tubing holder
1
Hook
2 Push
10. Indoor unit installation.
• Hook the indoor unit onto the upper portion of installation plate. (Engage the two hooks of the rear top of the indoor unit with the upper edge of the installation plate.)
Ensure the hooks are properly seated on the installation plate by moving it in left and right.
Connecting cable
Drain hose
Press the lower left and right side of the unit against the Installation Plate until the hooks engages with their slots (sound click).
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LGE Internal Use Only
(3) Connecting Pipings and the cable to Outdoor unit
1) Connecting the pipings to the Outdoor unit
1. Align the center of the pipings and sufficiently tighten the flare nut with fingers.
2. Finally, tighten the flare nut with torque wrench until the wrench clicks.
• When tightening the flare nut with torque wrench, ensure the direction for tightening follows the arrow on the wrench.
Pipe Size
Liquid Side (1/4")
Gas Side (3/8")
Gas Side (1/2")
Torque
1.8kg m(13ft lbs)
4.2kg m(30.3ft lbs)
5.5kg m(39.8ft lbs)
Outdoor unit
A-UNIT
Gas side piping
B-UNIT
Liquid side piping
Torque wrench
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LGE Internal Use Only
Connection of the cable
1. Remove the cover control from the unit by loosening the screw.
L1 L2
Power Source
208/230V AC
(High voltage)
C
A-UNIT
G V S C
B-UNIT
G V S
Outdoor unit
Terminal block
Over 5mm(0.2")
Holder for power supply cord
Power supply cable
C G V S
Terminal BLOCK
Indoor A-UNIT
C G V S
Terminal BLOCK
Indoor B-UNIT
2. Dismount caps on the conduit panel.
3. Temporarily mount the conduit tubes on the conduit panel.
4. Connect the wires to the terminals on the control board individually as the following.
5. Secure the cable onto the control board with the holder (clamper).
6. Ground the unit in accordance with local codes.
7. Refix the cover control to the original position with the screw.
8. Use lock nuts to secure the conduit tubes.
Cover control
Connecting cable
CAUTION
The power cable connected to the outdoor unit should be complied with the following specifications.
(UL recognized and CSA certified)
AWG 12
GN/YL
1. Separately wire the high and low voltage line.
2. Use heat-proof electrical wiring capable of withstanding temperature up to 167˚F.
3. Use outdoor and waterproof connection cable rated more than 300V for the connection between indoor and outdoor unit. (For example, Type SJO-WA)
20mm(0.79")
The connecting cable connected to the indoor and outdoor unit should be complied with the following specifications. (UL recognized and CSA certified)
AWG 18
• Be sure to comply with local codes while running the wire from the indoor unit to the outdoor unit(size of wire and wiring method, etc).
• Every wire must be connected firmly.
• No wire should be allowed to touch refrigerant tubing, the compressor or any moving parts.
GN/YL
20mm(0.79")
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LGE Internal Use Only
Connection method of the connecting cable(Example)
(1) Dismount two-caps on the conduit panel.
(2) Make a hole appropriate for the passage of connection cable through on cap by tool.
(for low voltage line)
(3) Pass the connecting cable through the hole.
(4) Properly connect the cable on the terminal block.
(5) Fix the connection cable with clamp cord provided on the unit not to have strain at the terminal when the connection cable is pulled outside up to a 35 pound weight.
(6) Wind the vinyl tape round the connecting cable for sealing between the surface of the connection cable and cap.
(7) Mount the taped part of cable on the cap.
(8) Finally, mount the holed cap with the wound cable on the conduit panel.
WARNING
Loose wiring may cause the terminal to overheat or result in unit malfunction. A fire hazard may also exist.
Therefore, be sure all wiring is tightly connected.
Terminal block
G
Clamp cord
Cap(Reuse)
Lock nut
Power supply line
(1ø, 230/208V)
Conduit panel
Hole
(for low voltage line)
Cap(Remove)
Taping
(for sealing)
Low voltage line
(connecting cable)
High voltage
Solid wire
Loop
When connecting each power wire to the corresponding terminal, follow instructions "How to connect wiring to the terminals" and fasten the wire tightly with the fixing screw of the terminal plate.
How to connect wiring to the terminals
For solid core wiring (or F-cable)
(1) Cut the wire end with a wire cutter of wire-cutting pliers, then strip the insulation to expose the solid wire about 25mm(15/16")
(2) Using a screwdriver, remove the terminal screw(s) on the terminal plate.
(3) Using pliers, bend the solid wire to from a loop suitable for the terminal screw.
(4) Shape the loop wire properly, place it on the terminal plater and tighten securely with the terminal screw using a screwdriver.
For strand wiring
(1) Cut the wire end with a wire cutter or wire-cutting pliers, then strip the insulation to expose the strand wiring about 10mm(3/8").
(2) Using a screwdriver, remove the terminal screw(s) on the terminal plate.
(3) Using a round terminal fastener or pliers, securely clamp each stripped wire end with a round terminal.
(4) Position the round terminal wire, and replace and tighten the terminal screw using a screwdriver.
Loosening the terminal block screw
Insulation
Strand wire
Low voltage
Connecting cable
Fastening the wire tightly
Round terminal
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LGE Internal Use Only
If a power plug is not to be used, provide a circuit breaker between power source and the unit as shown below.
Main power source
Air
Conditioner
Circuit Breaker
Use a circuit breaker or time delay fuse.
Model
18K
24K
Power source Fuse or breaker
Capacity
1ø,230/208V
1ø,230/208V
15A
20A
Connect the cable to the indoor unit
1. Connect the wires to the terminals on the control board individually according to the outdoor unit connection.
• Ensure that the color of the wires of outdoor unit and the terminal No. are the same as those of indoor unit respectively.
(Refer to Wiring diagram on page11.)
WARNING
• Be sure to refer to the wiring diagram label inside the cover control and carry out the correct field wiring.
Wrong wiring can cause the unit to misoperate to result in a fire hazard.
• Check local electrical codes and any specified wiring instructions or limitations.
Connecting cable
2. Attach the Grille onto the cabinet.
• Grasp lower the left and right side of the Grille and engage four tabs on the top inside edge of the chassis.
• Press the Grille toward the chassis until it will be back into place.
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LGE Internal Use Only
(4) Checking the drainage
1. To remove the front panel from the indoor unit, remove the front panel from the indoor unit cabinet.
■ Set the air direction louvers up-and-down to the position(horizontally) by hand.
■ Remove the securing screws that retain the front panel. Pull the lower left and right sides of the grille toward you and lift it off.
(9K Btu models: 2EA,
12K Btu models: 3EA)
(5) Form the piping
1. Form the piping by wrapping the connecting portion of the indoor unit with insulation material and secure it with two kinds of vinyl tapes.
■ If you want to connect an additional drain hose, the end of the drain outlet should be routed above the ground. Secure the drain hose appropriately.
2. In cases where the outdoor unit is installed below the indoor unit perform the following.
■ Tape the piping, drain hose and connecting cable from down to up.
■ Secure the tapped piping along the exterior wall using saddle or equivalent
Pull the right and the left side.
Screw
2. To check the drainage.
■ Pour a glass of water on the evaporator.
■ Ensure the water flows through the drain hose of the indoor unit without any leakage and goes out the drain exit.
Seal a small opening around the pipings with gum type sealer.
Taping
Drain hose
Plastic band
Pipings
Connecting cable
• Trap is required to prevent water from entering into electrical parts.
3. Drain piping
■ The drain hose should point downward for easy drain flow.
Downward slope
■ Do not make drain piping.
Do not raise
Accumulated
Air
Water leakage
Water leakage
Waving
Water leakage
Tip of drain hose dipped in water
Less than
50mm gap
Ditch
Copyright ©2008 LG Electronics. Inc. All right reserved.
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- 31 -
3. In cases where the Outdoor unit is installed above the Indoor unit perform the following.
■ Tape the piping and connecting cable from down to up.
■ Secure the taped piping along the exterior wall.
Form a trap to prevent water entering the room.
■ Fix the piping onto the wall by saddle or equivalent.
Seal a small opening around the pipings with gum type sealer.
Trap
LGE Internal Use Only
(6) Air Purging of the Pipings and indoor unit
The air which contains moisture remaining in the is refrigeration cycle may cause a malfunction on the compressor.
1. Confirm that both the liquid side valve and the gas side valve are set to the closed position.
2. After connecting the piping, check the joints for gas leakage with gas leak detector.
3. Remove the service port nut, and connect the gauge manifold and the vacuum pump to the service port by the charge hose.
4. Vacuum the indoor unit and the connecting pipes until the pressure in them lowers to below-76cmHg.
5. Disconnect the charge hose and fit the nut to the service port.
(Tightening torque: 1.8kg.m[13ft.lbs])
6. Remove the valve stem nuts, and fully open the stems of the 2-way and 3-way valves with a hexagon wrench.
7. Tighten the valve stem nuts of the 2-way valve and 3-way valve.
Indoor unit
Liquid side
2-way valve
Closed
Gas side
3-way valve
Closed
Vacuum pump
OPEN CLOSE
Outdoor unit
Copyright ©2008 LG Electronics. Inc. All right reserved.
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- 32 -
LGE Internal Use Only
(7) Maximum Length of Pipe and Freon Extra Charge
Charge amount per 1m(39.4")
Model
TM-1830C2L
TM-1830H2L
TM-2430C2L
TM-2430H2L
STANDARD
LENGTH(m)
7.5(295.3")
7.5(295.3")
INDOOR UNIT
B(Length)
A(Height)
A
CONNECTION TYPE
B C D
7 15 7 15
7 15 7 15
OUTDOOR UNIT
Charge am't(g) per 1m(39.4")
20
20
C(Height)
INDOOR UNIT
D(Length)
** A, B mean indoor unit higher located than outdoor unit.
C, D mean outdoor unit higher located than indoor unit.
Copyright ©2008 LG Electronics. Inc. All right reserved.
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LGE Internal Use Only
(8) Test running
1) Connection of power supply
1. Connect the power supply cord to the independent power supply.
2. Prepare the remote control.
• Insert two batteries provided.
Remove the battery cover from the remote controller.
• Slide the cover according to the arrow direction.
Insert the two batteries.
(Two "R03" or "AAA" dry-cell batteries or equivalent.)
• Be sure that the (+) and (-) directions are correct.
• Be sure that both batteries are new.
Re-attach the cover.
• Slide it back into position.
3. Operate the unit at cooling operation mode for fifteen minutes or more.
Battery Cover
Settlement of Outdoor Unit
• Anchor the outdoor unit with a bolt and nut
(ø10mm : 0.39") tightly and horizontally on a concrete or rigid mount.
• When installing on the wall, roof or rooftop, anchor the mounting base securely with a nail or wire assuming the influence of wind and earthquake.
• In the case when the vibration of the unit is conveyed to the house, settle the unit with an antivibration rubber.
2) Evaluation of the performance
1. Measure the temperature of the intake and discharge air.
2. Ensure the difference between the intake temperature and the discharge one is more than 8°C(46.4°F).
Bolt
Tubing connection
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- 34 -
Discharge air
LGE Internal Use Only
Operation
(1) Name and Function-Remote Control (Door Closed)
Remote Control
Signal transmitter
Transmits the signals to the room air conditioner.
5
4
2
Signal transmitter
6
1
3
Flip-up door
(closed)
1
START/STOP BUTTON
Operation starts when this button is pressed and stops when the button is pressed again.
2
OPERATION MODE SELECTION BUTTON
Used to select the operation mode.
3
ROOM TEMPERATURE SETTING BUTTONS
Used to select the room temperature.
4
INDOOR FAN SPEED SELECTOR
Used to select fan speed in four steps low, medium, high, or CHAOS.
5
JET COOL
Used to start or stop the speed cooling. (Speed cooling operates super high fan speed in cooling mode.)
6
CHAOS SWING BUTTON
Used to stop or start louver movement and set the desired up/down airflow direction.
Copyright ©2008 LG Electronics. Inc. All right reserved.
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LGE Internal Use Only
(2) Name and Function-Remote Control (Door Opened)
1
2
3
Remote Control
Signal transmitter
Transmits the signals to the room air conditioner.
Signal transmitter
ON OFF
SET CANCEL
˚C/˚F
6
7
4
5
8
1
ON/OFF TIMER BUTTONS
Used to set the time of starting and stopping operation.
2
TIME SETTING BUTTONS
Used to adjust the time.
3
TIMER SET/CANCEL BUTTONS
Used to set the timer when the desired time is obtained and to cancel the Timer operation.
4
SLEEP MODE AUTO BUTTON
Used to set Sleep Mode Auto operation.
5
AIR CIRCULATION BUTTON
Used to circulate the room air without cooling or heating
(turns indoor fan on/off).
6
ROOM TEMPERATURE CHECKING BUTTON
Used to check the room temperature.
7
˚C TO ˚F SWITCHING BUTTON
8
RESET BUTTON
Used prior to resetting time or after replacing batteries.
Copyright ©2008 LG Electronics. Inc. All right reserved.
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- 36 -
LGE Internal Use Only
Disassembly of the parts (Indoor unit)
Warning :
Disconnect the unit from power supply before making any checks.
Be sure the power switch is set to “OFF”.
To remove the Grille from the Chassis.
• Set the up-and-down air discharge louver to open position (horizontally) by finger pressure.
• Remove the securing screws
• To remove the Grille, pull the lower left and right side of the grille toward you (slightly tilted) and lift it straight upward.
Screw
1. To remove the sensor, housing connect, step motor conductor with sensor holder, Motor,
Evaporator & P.C.B.
Motor
Conductor
Sensor
Conductor
Step Motor
Conductor
Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 37 -
LGE Internal Use Only
2. To remove the Control Box.
• Remove securing screws.
• Pull the control box out from the chassis carefully.
3. To remove the Discharge Grille.
• Pull the discharge grille out from the chassis carefully.
4. To remove the Evaporator.
• Remove screws securing the evaporator and the holder eva.
• Unhook the tab on the right inside of the chassis at the same time, slightly pull the evaporator toward you until the tab is clear of the slot.
5. To remove the Cross-Flow Fan
• Loosen the screw securing the cross-flow fan to the fan motor (do not remove).
• Lift up the right side of the cross-flow fan and the fan motor, separate the fan motor from the cross-flow fan.
• Remove the left end of the cross-flow fan from the self-aligning bearing.
Copyright ©2008 LG Electronics. Inc. All right reserved.
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- 38 -
LGE Internal Use Only
2-way, 3-way Valve
2-way Valve (Liguid Side) 3-way Valve (Gas Side)
Flare nut
Hexagonal wrench
(4mm)
Open position
Closed position
To piping connection
To outdoor unit
Valve cap
Flare nut
Open position
Closed position
Pin
To piping connection
Service port cap
Service port
To outdoor unit
Works
Shipping
1.
Air purging
(Installation)
Operation
2.
Pumping down
(Transfering)
3.
Evacuation
(Servicing)
4.
Gas charging
(Servicing)
5.
Pressure check
(Servicing)
6.
Gas releasing
(Servicing)
Shaft position
Closed
(with valve cap)
Open
(counter-clockwise)
Open
(with valve cap)
Closed
(clockwise)
Open
Open
Open
Open
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- 39 -
Shaft position
Closed
(with valve cap)
Closed
(clockwise)
Open
(with valve cap)
Open
(counter-clockwise)
Open
Open
Open
Open
Service port
Closed
(with cap)
Open
(push-pin or with vacuum pump)
Closed
(with cap)
Open
(connected manifold gauge)
Open
(with charging cylinder)
Open
(with charging cylinder)
Open
(with charging cylinder)
Open
(with charging cylinder)
LGE Internal Use Only
(1) Pumping down
Indoor unit
Liquid side
2-Way valve
Close
Outdoor unit
Low-handle
(CLOSE)
Gas side
3-Way valve
Open manifold gauge
Hi- handle
(CLOSE)
•
Procedure
1. Confirm that both the gas side and liquid side valves are set to the open position.
- Remove the valve stem caps and confirm that the valve stems are in the raised position.
- Be sure to use a hexagonal wrench to operate the valve stems.
2. Operate the unit for 10 to 15 minutes.
3. Stop operation and wait for 3 minutes, then connect the manifold gauge to the service port of the gas side valve.
- Connect the hose of the gauge with the push pin to the service port.
4. Air purging of the charge hose.
- Open the Low-handle valve on the gauge slightly to air purge from the hose.
5. Set the liquid side valve to the closed position.
6. Operate the air conditioner at the cooling cycle and stop it when the gauge indicates 1kg/cm
2 g.
7. Immediately set the gas side valve to the closed position.
- Do this quickly so that the gauge ends up indicating 1kg/ g.
8. Disconnect the charge set, and mount the liquid side and gas side valve caps and the service port nut.
- Use torque wrench to tighten the service port nut to a torque of
1.8kg.m[13ft.lbs].(4.2kg.m[30.3ft.lbs]/5.5kg.m[39.8ft.lbs])
- Be sure to check for gas leakage.
9. Apply steps from 1 to 8 to each unit (A-unit,
B-unit) by the same method.
Copyright ©2008 LG Electronics. Inc. All right reserved.
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- 40 -
LGE Internal Use Only
(2) Evacuation
(All amount of refrigerant leaked)
Indoor unit
Liquid side
2-Way valve
Close
Vacuum pump
Lowhandle
(OPEN) manifold gauge
Gas side
3-Way valve
Open
Hi- handle
(CLOSE)
Outdoor unit
• Procedure
1. Confirm that both the liguid side valve and gas side valve are set to the opened position.
2. Connect the vaccum pump to the center hose of the manifold gauge.
3. Connect the service port of the gas side valve to the low side of the gauge.
4. Evacuation for approximately one hour.
- Confirm that the gauge needle has moved toward-76 cmHg (vacuum of 4 mmHg or less).
5. Close the Low handle of the gauge turn off the vacuum pump, and confirm that the gauge needle does not move(approximately 5 minutes after turning off the vacuum pump).
6. Disconnect the charge hose from the vacuum pump.
- Vacuum pump oil.
If the vacuum pump oil becomes dirty or depleted,replenish as needed.
7. Mount the valve caps and the service port caps.
8. Apply steps from 1 to 7 to each unit (A-unit, Bunit) by the same method.
Copyright ©2008 LG Electronics. Inc. All right reserved.
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- 41 -
LGE Internal Use Only
(3) Gas Charging
(After Evacuation)
Indoor unit
Liquid side
2-Way valve
Close
Outdoor unit
Charging cylinder
Low-handle
Check valve
(OPEN)
Gas side
3-Way valve
Open manifold gauge
Hi- handle
(CLOSE)
Procedure
1. Connect the gauge to the charging cylinder.
- Connect the charge hose which you disconnected from the vacuum pump to the valve at the bottom of the cylinder.
- If you are using a gas cylinder, also use a scale and reverse the cylinder so that the system can be charged with liquid.
2. Purge the air from the charge hose.
- Open the valve at the bottom of the cylinder and press the check valve on the charge set to purge the air. (Be careful of the liquid refrigerant). The procedure is the same if using a gas cylinder.
3. Open the low handle on the gauge and charge the system with liquid refrigerant.
- If the system can not be charged with the specified amount of refrigerant, it can be charged with a little at a time (approximately 150g[0.33lbs] each time) while operating the air conditioner in the cooling cycle; however, one time is not sufficient, wait approximately 1 minute and then repeat the procedure(pumping down-pin).
4. Immediately disconnect the charge hose from the gas side valve's service port.
This is different from previous procedures.
Because you are charging with liquid refrigerant from the gas side, absolutely do not attempt to charge with larger amounts of liquid refrigerant while operating the air conditioner.
- Stopping partway will allow the gas to be discharged.
- If the system has been charged with liquid refrigerant while operating the air conditioner turn off the air conditioner before disconnecting the hose.
5. Mount the valve stem nuts and the service port nut.
- Use torque wrench to tighten the service port nut to a torque of
1.8kg.m[13ft.lbs].(4.2kg.m[30.3ft.lbs]/5.5kg.m[39.8ft.lbs])
- Be sure to check for gas leakage.
6. Apply steps from 1 to 5 to each unit
(A-unit, B-unit) by the same method.
Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 42 -
LGE Internal Use Only
Cycle Troubleshooting Guide
Trouble analysis
1. Check temperature difference between intake and discharge air and operating current.
Temp. difference : approx. 0°C(0°F)
Current : less than 80% of rated current
All amount of refrigerant leaked out.
Check refrigeration cycle.
Temp. Difference
Temp. difference : approx. 8°C(14.4°F)
Current : less than 80% of rated current
Refrigerant leakage
Clog of refrigeration cycle
Defective compressor
Operating Current
Temp. difference : less than 8°C(14.4°F)
Current : over the rated current
Excessive amount of refrigerant
Temp. difference : over 8°C(14.4°F) Normal
Notice:
Temperature difference between intake and discharge air depends on room air humidity. When the room air humidity is relativery higher, temperature difference is smaller. When the room air humidity is relatively lower temperature difference is larger.
2. Check temperature and pressure of refrigeration cycle.
Suction pressure
(Compared with
Temperature
(Compared with the normal value) the normal value)
High
Higher
Normal
Lower Higher
Cause of Trouble
Defective compressor
Defective 4-way reverse valve
Excessive amount of refrigerant
Insufficient amount of refrigerant(Leakage)
Clogging
Description
Current is low.
High pressure does not quickly rise at the beginning of operation.
Current is low.
Current is low.
Notice:
1. The suction pressure is usually 4.5~6.0 kg/cm 2 G(64~85.3 P.S.I.G.) at normal condition.
2. The temperature can be measured by attaching the thermometer to the low pressure tubing and wrap it with putty.
Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 43 -
LGE Internal Use Only
Electronic Parts Troubleshooting Guide
1. Product does not operate at all.
(* Refer to Electronic Control Device drawing and Schematic diagram.)
Turn off Main Power
(After 10 seconds)
Turn on Main Power
NO
Does "beeping" sound is made from the Indoor Unit?
YES
Primarily, the operating condition of Micom is OK.
Check the voltage of power(About AC 220V/AC240V, 60Hz)
• Main power's voltage
• Voltage applied to the unit
• Connecting method of Indoor/Outdoor connecting cable
• Check Fuse (Outdoor PCB Ass'y)
• Check Varistor
ZNRØ1J(Outdoor PCB Ass'y)
Check each load(Indoor/Outdoor Fan Motor,
Compressor, Stepping Motor etc.) and contacting condition of related connector
Check the connection housing for contacting
• Connector related to CN-DC/AC
• Display PWB Ass'y Check
Items
• Power Transformer
(Outdoor unit)
- Input Voltage
- Output Voltage
PCB Board Operation Check
Content
- About AC220V/240V±10% - Check the power voltage
- About AC14±3V
• DC +12V
• IC01D(7812) Output
(Indoor/Outdoor unit)
• DC +5V
• IC02D(7805) Output
(Indoor/Outdoor unit)
• IC01A(KIA7036, Reset IC)
X01(8MHz)
• Voltage of Micom No. 2,
(DC +4.5V over) and Soldering condition.
Remedy
• Replace Trans
• Replace IC01D
• Replace IC02D
• Replace faulty parts
Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 44 -
LGE Internal Use Only
2. The product is not operate with the remote control.
Turn on Main Power
While the compressor has been stopped, the compressor does not operate owing to the delaying function for 3 minutes after stopped.
When the compressor stopped Indoor Fan is driven by a low speed.
At this point the wind speed is not controlled by the remote controller.
(When operated in the Sleeping Mode, the wind speed is set to the low speed by force.)
Cause by the remote control
Caused by other parts except the remote control
When the mark( ) is displayed in LCD screen, replace battery.
Check the contact of CN-DISPI connector.
When the detect switch(double key) inside the remote controller door is fault, it is impossible to operate temperature regulating( / ) and wind speed selecting.
Check DISP PWB Ass'y
- Voltage between CN DISP1 - : DC +5V
Check the connecting circuit between the remote controller MICOM (No. ) - R17(2
Ω) - IR LED - Q1 -
R16(2.2K
Ω).
Check point
• Check the connecting circuit between PIN -
R01L(1K) - C01L(680PF) - MICOM PIN
• Check Receiver Ass'y
Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 45 -
LGE Internal Use Only
3. When cooling does not operate
Turn on Main Power
Operate "Cooling Mode( )" by setting the desired temperature of the remote controller is less than one of the indoor temperature by 1°C(1.8°F) at least.
When in Air Circulation Mode, Compressor/Outdoor Fan is stopped.
Check the sensor for indoor temperature is attached as close as to be effected by the temperature of Heat Exchanger(EVA).
When the sensor circuit for indoor temperature and connector are in bad connection or are not engaged, Compressor/Outdoor Fan is stopped.
• Check the related circuit of R02H(12.1K), R01H(1.0K), R04H(6.2K),
R03H(1.0K) (Indoor unit).
• Check the indoor temperature sensor is disconnected or not(About 10k
Ω / at 25°C[77°F]).
Check if connection line (Indoor/Outdoor) is complied with Wiring Diagram.
Bad connection Good connection
Check Outdoor Unit
(PCB Ass'y)
Correct connection line
Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 46 -
LGE Internal Use Only
4. When indoor Fan does not operate.(or "ON/OFF" led of display blinks 8 times)
Turn off Main power
Check it (Indoor/Outdoor)the connection line is complied with Wiring Diagram
Bad connection Good connection
Correct connection line
Check the line fuse in the outdoor unit
Check the connection of CN-MOTOR check the operation of blower by manual
Check POLY S/W in indoor PCB Ass'y
If it is opened
Exchange Indoor PCB Ass'y
If it is shorted
Check the outdoor PCB Ass'y
Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 47 -
LGE Internal Use Only
5. When Vertical Louver does not operate.
• Confirm that the Vertical Louver is normally geared with the shaft of
Stepping Motor.
• If the regular torque is detected when rotating the Vertical Louver with hands Normal
• Check the connecting condition of CN-U/D Connector
• Check the soldering condition(on PWB) of CN-U/D Connector
Check the operating circuit of the Vertical Louver
• Confirm that there is DC +12V between pin (RED) of CN-U/D and
GND.
If there are no problems after above checks
• Confirm the assembly conditions that are catching and interfering parts in the rotation radial of the Vertical Louver
Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 48 -
LGE Internal Use Only
6. When Heating does not operate
Turn ON Main Power
Operate “Heating Mode( )” by setting the desired temperature of the remote control is higher than one of the indoor temperature by
2°C(3.6°F) at least.
In heating Mode, the indoor fan operates in case the pipe temperature is higher than 28°C(82.4°F).
Check the connector of intake and pipe sensor(thermistors)
• Check the related circuit of R02H(12.1K), R01H(1.0K), R04H(6.2K),
R03H(1.0K).
• Check the indoor room temperature is disconnected or not (about
10K
Ω/at 25°C[77°F]).
• Check the indoor pipe temperature is disconnected or not (about
5K
Ω/at 25°C[77°F]).
Check if connection line (Indoor/Outdoor) is complied with Wiring Diagram.
Bad connection Good connection
Check Outdoor Unit
(PCB Ass'y)
Correct connection line
Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 49 -
LGE Internal Use Only
7. Outdoor unit does not operate at all.
Check Outdoor Unit
Items
• Power Transformer
(Outdoor unit)
- Input Voltage
- Output Voltage
• IC01D(7812) Output
(Indoor/Outdoor unit)
• IC02D(7805) Output
(Indoor/Outdoor unit)
• IC01A(KIA7036, Reset IC)
X01(8MHz)
PCB Board Operation Check in Outdoor
Content Remedy
- About AC220V/240V±10% - Check the power voltage
- About AC14±3V
• Replace Trans
• DC +12V
• Replace IC01D
• DC +5V
• Replace IC02D
• Replace faulty parts
Turn off Main Power
• Check the electrical wiring diagram of outdoor side.
• Check the abnormal condition for the component of
Compressor/Outdoor Fan Motor/4-way.
• Check the “open” or “short” of connecting wires between indoor and outdoor.
8. Communication error
• The control data can be transmitted or received between indoor and outdoor unit with one signal cable.
• If the data be disturbed by any noise level and misconnection, the unit will be operated incorrectly. In this case, the indoor unit blinks the operation and operation LED on display and indoor fan, outdoor fan, COMP are not operated.
• The unit can be reoperated by On/Off control of Remocon.
Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 50 -
LGE Internal Use Only
Electronic Control Device
1. Indoor
• MAIN P.C.B ASM
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Only for training and service purposes
- 51 -
LGE Internal Use Only
2. Outdoor
• MAIN P.C.B ASM
Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 52 -
LGE Internal Use Only
3. Display Ass'y
Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 53 -
LGE Internal Use Only
Schematic Diagram
1. Indoor
Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 54 -
LGE Internal Use Only
2. Outdoor
Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 55 -
LGE Internal Use Only
Exploded View and Replacement Parts List
1. Indoor Unit (TM-1830C2L, TM-1830H2L)
Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 56 -
LGE Internal Use Only
2. Indoor Unit (TM-2430C2L, TM-2430H2L)
Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 57 -
LGE Internal Use Only
3. Outdoor Unit (TM-1830C2L, TM-2430C2L)
Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 58 -
LGE Internal Use Only
4. Outdoor Unit (TM-1830H2L, TM-2430H2L)
Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 59 -
LGE Internal Use Only
P/NO : 3828A20097M JULY, 2008
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