LG ARNU07GCEA4 User manual

Multi V Air Conditioner
MODEL :
CAUTION
Before Servicing the unit, read the safety precautions in General SVC manual.
Only for authorized service personnel.
SVC MANUAL(Exploded View)
Internal Use Only
http://biz.lgservice.com
ARNU07GCEA4 ARNU07GCEU4
ARNU09GCEA4 ARNU09GCEU4
ARNU12GCEA4 ARNU12GCEU4
ARNU15GCEA4 ARNU15GCEU4
ARNU18GCFA4 ARNU18GCFU4
ARNU24GCFA4 ARNU24GCFU4

- 2 -
Copyright ©2014 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
1. Specification
Notes:-
1. Capacities are based on the following conditions:
Cooling • Indoor temp. 27°C[80.6°F]DB/ 19°C[66.2°F]WB
• Outdoor temp. 35°C[95°F]DB/ 24°C[75.2°F]WB
• Interconnecting Piping Length 7.5m(24.6ft)
• Level Difference of Zero
Heating • Indoor temp. 20°C[68°F]DB/ 15°C[59°F]WB
• Outdoor temp. 7°C[44.6°F]DB/ 6°C[42.8°F]WB
• Interconnecting Piping Length 7.5m(24.6ft)
• Level Difference of Zero
2. Capacities are net capacities
3. Due to our policy of innovation some specifications may be changed without prior notification
4. To be added for more available Models
5. EEV : Electronic Expansion Valve
Conversion Formula
kcal/h= kW x 860
Btu/h = kW x 3412
cfm = m3/min x 35.3
l/s = CMM x 1000/60
Type Floor Standing
Model Unit ARNU07GCEA4 ARNU09GCEA4 ARNU12GCEA4
Cooling Capacity
kW 2.2 2.8 3.6
kcal/h 1,900 2,400 3,100
Btu/h 7,500 9,600 12,300
Heating Capacity
kW 2.5 3.2 4
kcal/h 2,200 2,800 3,400
Btu/h 8,500 10,900 13,600
Casing Galvanized Steel Plate Galvanized Steel Plate Galvanized Steel Plate
Dimensions
(WxHxD) Body mm 1,067 x 635 x 203 1,067 x 635 x 203 1,067 x 635 x 203
inch 42 x 25 x 8 42 x 25 x 8 42 x 25 x 8
Coil Rows x Columns x FPI 2 x 12 x 19 2 x 12 x 19 2 x 12 x 19
Face Area m30.16 0.16 0.16
Fan Type Sirocco Fan Sirocco Fan Sirocco Fan
Motor Output x Number W 19 x 1, 5 x 1 19 x 1, 5 x 1 19 x 1, 5 x 1
Running Current A 0.76 0.76 0.76
Air Flow Rate(H / M / L) CMM 8.5 / 7.5 / 6.5 9.5 / 8.5 / 7.5 10.5 / 9.5 / 8.5
cfm 300 / 265 / 229 335 / 300 / 265 371 / 335 / 300
Drive Direct Direct Direct
Motor type BLDC BLDC BLDC
Temperature Control
Microprocessor,
Thermostat for cooling
and heating
Microprocessor,
Thermostat for cooling
and heating
Microprocessor,
Thermostat for cooling
and heating
Sound Absorbing Thermal Insulation Material Foamed polystrene Foamed polystrene Foamed polystrene
Air Filter Resin Net(washable) Resin Net(washable) Resin Net(washable)
Safety Device Fuse Fuse Fuse
Pipe
Connections
Liquid Side mm(inch) Ø6.35(1/4) Ø6.35(1/4) Ø6.35(1/4)
Gas Side mm(inch) Ø12.7(1/2) Ø12.7(1/2) Ø12.7(1/2)
Drain Pipe(Internal Dia.) mm(inch) 12(15/32) 12(15/32) 12(15/32)
Net Weight kg(lbs) 27(59.5) 27(59.5) 27(59.5)
Noise Level(Sound Press, 1m, H / M / L) dB(A)+1 35 / 33 / 31 36 / 34 / 32 37 / 35 / 33
Power Supply Ø, V, Hz 1, 220-240, 50 1, 220-240, 50 1, 220-240, 50
1, 220, 60 1, 220, 60 1, 220, 60
Refrigerant Control EEV EEV EEV
Power cable mm2CV1.5 x 3C CV1.5 x 3C CV1.5 x 3C
Transmission Cable(AWG#-C) mm2CVV-SB 1.0~1.5 x 2C CVV-SB 1.0~1.5 x 2C CVV-SB 1.0~1.5 x 2C

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Copyright ©2014 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
Notes:-
1. Capacities are based on the following conditions:
Cooling • Indoor temp. 27°C[80.6°F]DB/ 19°C[66.2°F]WB
• Outdoor temp. 35°C[95°F]DB/ 24°C[75.2°F]WB
• Interconnecting Piping Length 7.5m(24.6ft)
• Level Difference of Zero
Heating • Indoor temp. 20°C[68°F]DB/ 15°C[59°F]WB
• Outdoor temp. 7°C[44.6°F]DB/ 6°C[42.8°F]WB
• Interconnecting Piping Length 7.5m(24.6ft)
• Level Difference of Zero
2. Capacities are net capacities
3. Due to our policy of innovation some specifications may be changed without prior notification
4. To be added for more available Models
5. EEV : Electronic Expansion Valve
Conversion Formula
kcal/h= kW x 860
Btu/h = kW x 3412
cfm = m3/min x 35.3
l/s = CMM x 1000/60
Type Floor Standing
Model Unit ARNU15GCEA4 ARNU18GCFA4 ARNU24GCFA4
Cooling Capacity
kW 4.5 5.6 7.1
kcal/h 3,900 4,800 6,100
Btu/h 15,400 19,100 24,200
Heating Capacity
kW 5 6.3 8
kcal/h 4,300 5,400 6,900
Btu/h 17,100 21,500 27,300
Casing Galvanized Steel Plate Galvanized Steel Plate Galvanized Steel Plate
Dimensions
(WxHxD) Body mm 1,067 x 635 x 203 1,345 x 635 x 203 1,345 x 635 x 203
inch 42 x 25 x 8 52-15/16 x 25 x 8 52-15/16 x 25 x 8
Coil Rows x Columns x FPI 2 x 12 x 19 3 x 11 x 19 3 x 11 x 19
Face Area m30.16 0.23 0.23
Fan Type Sirocco Fan Sirocco Fan Sirocco Fan
Motor Output x Number W 19 x 1, 5 x 1 19 x 2 19 x 2
Running Current A 0.76 0.97 0.97
Air Flow Rate(H / M / L) CMM 11.5 / 10.0 / 9.5 16.0 / 14.0 / 12.0 18.0 / 16.0 / 14.0
cfm 406 / 353 / 335 565 / 494 / 424 635 / 565 / 494
Drive Direct Direct Direct
Motor type BLDC BLDC BLDC
Temperature Control
Microprocessor,
Thermostat for cooling
and heating
Microprocessor,
Thermostat for cooling
and heating
Microprocessor,
Thermostat for cooling
and heating
Sound Absorbing Thermal Insulation Material Foamed polystrene Foamed polystrene Foamed polystrene
Air Filter Resin Net(washable) Resin Net(washable) Resin Net(washable)
Safety Device Fuse Fuse Fuse
Pipe
Connections
Liquid Side mm(inch) Ø6.35(1/4) Ø6.35(1/4) Ø9.52(3/8)
Gas Side mm(inch) Ø12.7(1/2) Ø12.7(1/2) Ø15.88(5/8)
Drain Pipe(Internal Dia.) mm(inch) 12(15/32) 12(15/32) 12(15/32)
Net Weight kg(lbs) 27(59.5) 34(75.0) 34(75.0)
Noise Level(Sound Press, 1m, H / M / L) dB(A)+1 38 / 37 / 35 40 / 37 / 34 43 / 40 / 37
Power Supply Ø, V, Hz 1, 220-240, 50 1, 220-240, 50 1, 220-240, 50
1, 220, 60 1, 220, 60 1, 220, 60
Refrigerant Control EEV EEV EEV
Power cable mm2CV1.5 x 3C CV1.5 x 3C CV1.5 x 3C
Transmission Cable(AWG#-C) mm2CVV-SB 1.0~1.5 x 2C CVV-SB 1.0~1.5 x 2C CVV-SB 1.0~1.5 x 2C

- 4 -
Copyright ©2014 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
Notes:-
1. Capacities are based on the following conditions:
Cooling • Indoor temp. 27°C[80.6°F]DB/ 19°C[66.2°F]WB
• Outdoor temp. 35°C[95°F]DB/ 24°C[75.2°F]WB
• Interconnecting Piping Length 7.5m(24.6ft)
• Level Difference of Zero
Heating • Indoor temp. 20°C[68°F]DB/ 15°C[59°F]WB
• Outdoor temp. 7°C[44.6°F]DB/ 6°C[42.8°F]WB
• Interconnecting Piping Length 7.5m(24.6ft)
• Level Difference of Zero
2. Capacities are net capacities
3. Due to our policy of innovation some specifications may be changed without prior notification
4. To be added for more available Models
5. EEV : Electronic Expansion Valve
Conversion Formula
kcal/h= kW x 860
Btu/h = kW x 3412
cfm = m3/min x 35.3
l/s = CMM x 1000/60
Type Floor Standing
Model Unit ARNU07GCEU4 ARNU09GCEU4 ARNU12GCEU4
Cooling Capacity
kW 2.2 2.8 3.6
kcal/h 1,900 2,400 3,100
Btu/h 7,500 9,600 12,300
Heating Capacity
kW 2.5 3.2 4
kcal/h 2,200 2,800 3,400
Btu/h 8,500 10,900 13,600
Casing Galvanized Steel Plate Galvanized Steel Plate Galvanized Steel Plate
Dimensions
(WxHxD) Body mm 978 x 639 x 190 978 x 639 x 190 978 x 639 x 190
inch
38-1/2 x 25-5/32 x 7-15/32 38-1/2 x 25-5/32 x 7-15/32 38-1/2 x 25-5/32 x 7-15/32
Coil Rows x Columns x FPI 2 x 12 x 19 2 x 12 x 19 2 x 12 x 19
Face Area m30.16 0.16 0.16
Fan Type Sirocco Fan Sirocco Fan Sirocco Fan
Motor Output x Number W 19 x 1, 5 x 1 19 x 1, 5 x 1 19 x 1, 5 x 1
Running Current A 0.76 0.76 0.76
Air Flow Rate(H / M / L) CMM 8.5 / 7.5 / 6.5 9.5 / 8.5 / 7.5 10.5 / 9.5 / 8.5
cfm 300 / 265 / 229 335 / 300 / 265 371 / 335 / 300
Drive Direct Direct Direct
Motor type BLDC BLDC BLDC
Temperature Control
Microprocessor,
Thermostat for cooling
and heating
Microprocessor,
Thermostat for cooling
and heating
Microprocessor,
Thermostat for cooling
and heating
Sound Absorbing Thermal Insulation Material Foamed polystrene Foamed polystrene Foamed polystrene
Air Filter Resin Net(washable) Resin Net(washable) Resin Net(washable)
Safety Device Fuse Fuse Fuse
Pipe
Connections
Liquid Side mm(inch) Ø6.35(1/4) Ø6.35(1/4) Ø6.35(1/4)
Gas Side mm(inch) Ø12.7(1/2) Ø12.7(1/2) Ø12.7(1/2)
Drain Pipe(Internal Dia.) mm(inch) 12(15/32) 12(15/32) 12(15/32)
Net Weight kg(lbs) 21(46.3) 21(46.3) 21(46.3)
Noise Level(Sound Press, 1m, H / M / L) dB(A)+1 35 / 33 / 31 36 / 34 / 32 37 / 35 / 33
Power Supply Ø, V, Hz 1, 220-240, 50 1, 220-240, 50 1, 220-240, 50
1, 220, 60 1, 220, 60 1, 220, 60
Refrigerant Control EEV EEV EEV
Power cable mm2CV1.5 x 3C CV1.5 x 3C CV1.5 x 3C
Transmission Cable(AWG#-C) mm2CVV-SB 1.0~1.5 x 2C CVV-SB 1.0~1.5 x 2C CVV-SB 1.0~1.5 x 2C

- 5 -
Copyright ©2014 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
Notes:-
1. Capacities are based on the following conditions:
Cooling • Indoor temp. 27°C[80.6°F]DB/ 19°C[66.2°F]WB
• Outdoor temp. 35°C[95°F]DB/ 24°C[75.2°F]WB
• Interconnecting Piping Length 7.5m(24.6ft)
• Level Difference of Zero
Heating • Indoor temp. 20°C[68°F]DB/ 15°C[59°F]WB
• Outdoor temp. 7°C[44.6°F]DB/ 6°C[42.8°F]WB
• Interconnecting Piping Length 7.5m(24.6ft)
• Level Difference of Zero
2. Capacities are net capacities
3. Due to our policy of innovation some specifications may be changed without prior notification
4. To be added for more available Models
5. EEV : Electronic Expansion Valve
Conversion Formula
kcal/h= kW x 860
Btu/h = kW x 3412
cfm = m3/min x 35.3
l/s = CMM x 1000/60
Type Floor Standing
Model Unit ARNU15GCEU4 ARNU18GCFU4 ARNU24GCFU4
Cooling Capacity
kW 4.5 5.6 7.1
kcal/h 3,900 4,800 6,100
Btu/h 15,400 19,100 24,200
Heating Capacity
kW 5 6.3 8
kcal/h 4,300 5,400 6,900
Btu/h 17,100 21,500 27,300
Casing Galvanized Steel Plate Galvanized Steel Plate Galvanized Steel Plate
Dimensions
(WxHxD) Body mm 978 x 639 x 190 1,256 x 639 x 190 1,256 x 639 x 190
inch
38-1/2 x 25-5/32 x 7-15/32 49-7/16 x 25-5/32 x 7-15/32 49-7/16 x 25-5/32 x 7-15/32
Coil Rows x Columns x FPI 2 x 12 x 19 3 x 11 x 19 3 x 11 x 19
Face Area m30.16 0.23 0.23
Fan Type Sirocco Fan Sirocco Fan Sirocco Fan
Motor Output x Number W 19 x 1, 5 x 1 19 x 2 19 x 2
Running Current A 0.76 0.97 0.97
Air Flow Rate(H / M / L) CMM 11.5 / 10.0 / 9.5 16.0 / 14.0 / 12.0 18.0 / 16.0 / 14.0
cfm 406 / 353 / 335 565 / 494 / 424 635 / 565 / 494
Drive Direct Direct Direct
Motor type BLDC BLDC BLDC
Temperature Control
Microprocessor,
Thermostat for cooling
and heating
Microprocessor,
Thermostat for cooling
and heating
Microprocessor,
Thermostat for cooling
and heating
Sound Absorbing Thermal Insulation Material Foamed polystrene Foamed polystrene Foamed polystrene
Air Filter Resin Net(washable) Resin Net(washable) Resin Net(washable)
Safety Device Fuse Fuse Fuse
Pipe
Connections
Liquid Side mm(inch) Ø6.35(1/4) Ø6.35(1/4) Ø9.52(3/8)
Gas Side mm(inch) Ø12.7(1/2) Ø12.7(1/2) Ø15.88(5/8)
Drain Pipe(Internal Dia.) mm(inch) 12(15/32) 12(15/32) 12(15/32)
Net Weight kg(lbs) 21(46.3) 26.5(58.4) 26.5(58.4)
Noise Level(Sound Press, 1m, H / M / L) dB(A)+1 38 / 37 / 35 40 / 37 / 34 43 / 40 / 37
Power Supply Ø, V, Hz 1, 220-240, 50 1, 220-240, 50 1, 220-240, 50
1, 220, 60 1, 220, 60 1, 220, 60
Refrigerant Control EEV EEV EEV
Power cable mm2CV1.5 x 3C CV1.5 x 3C CV1.5 x 3C
Transmission Cable(AWG#-C) mm2CVV-SB 1.0~1.5 x 2C CVV-SB 1.0~1.5 x 2C CVV-SB 1.0~1.5 x 2C

- 6 -
Copyright ©2014 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
2. List of Functions
Air supply outlet
Airflow direction control(left & right)
Airflow direction control(up & down)
Auto swing(left & right)
Air flow Auto swing(up & down)
Airflow steps(fan/cool/heat)
Chaos swing
Chaos wind(auto wind)
Jet cool(Power wind)
Swirl wind
Deodorizing filter
Air purifying Plasma air purifier
Prefilter(washable / anti-fungus)
Drain pump
Installation E.S.P. control
Electric heater(operation)
High ceiling operation
Hot start
Reliability Self diagnosis
Soft dry operation
Auto changeover
Auto cleaning
Auto operation(artificial intelligence)
Auto restart operation
Child lock
Convenience Forced operation
Group control
Sleep mode
Timer(on/off)
Timer(weekly)
Two thermistor control
Standard wired remote controller
Wide Character wired remote controller
Picto wired remote controller
Individual Deluxe wired remote controller
control Simple wired remote controller
Wired remote controller(for hotel use)
Wireless remote controller(simple)
Wireless LCD remote control
Special Zone control
function kit CTIE
Electro thermostat
1
-
-
-
-
3/3/3
-
-
-
-
X
X
O
X
O
X
-
O
O
O
O(only heat recovery)
X
O(only heat pump or cooling only)
O
O
-
O
X
O
O
O
Accessory
Accessory
Accessory
Accessory
Accessory
X
Accessory
-
-
-
Function
Category
ARNU07GCEA4, ARNU07GCEU4
ARNU09GCEA4, ARNU09GCEU4
ARNU12GCEA4, ARNU12GCEU4
ARNU15GCEA4, ARNU15GCEU4
ARNU18GCFA4, ARNU18GCFU4
ARNU24GCFA4, ARNU24GCFU4
O : Applied X : Not applied – : No relation
Option : Model name & price are different according to options, and assembled in factory with main unit.
Accessory : Installed at field, ordered and purchased separately by the corresponding model name, supplied with separate package.

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Copyright ©2014 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
3. Piping Diagrams
Heat Exchanger
Sirroco Fan
lndoor unit
EEV :Heating
:Cooling
Filter
Filter
Th3 Th2
Th1
Refrigerant pipe connection port diameter
[Unit : mm(inch)]
LOC. Description PCB Connector (Color)
Th1 Thermistor for room air temperature CN-ROOM (Yellow)
Th2 Thermistor for pipe in temperature CN-PIPE_IN (White)
Th3 Thermistor for pipe out temperature CN-PIPE_OUT (Red)
CHASSIS MODEL GAS LIQUID
CE
ARNU07GCEA4 ARNU07GCEU4 Ø12.7(1/2) Ø6.35(1/4)
ARNU09GCEA4 ARNU09GCEU4 Ø12.7(1/2) Ø6.35(1/4)
ARNU12GCEA4 ARNU12GCEU4 Ø12.7(1/2) Ø6.35(1/4)
ARNU15GCEA4 ARNU15GCEU4 Ø12.7(1/2) Ø6.35(1/4)
CF ARNU18GCFA4 ARNU18GCFU4 Ø12.7(1/2) Ø6.35(1/4)
ARNU24GCFA4 ARNU24GCFU4 Ø15.88(5/8) Ø9.52(3/8)

- 8 -
Copyright ©2014 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
4. Wiring Diagrams
CN_MOTOR1 CN_MOTOR2 CN_DAMPER
CN_DDC
CN_ZONE CN_EXT CN_EEV
CN_OPTION
CN_DISPLAY
CN_PTC
CN_485
CN_HUMID
CN_CC
CN_FLOAT
CN_WF
CN_PIPE_OUT
CN_POWER CN_D_PUMP
CN_REMO
CN_VM
CN_ROOM
CN_PIPE_IN
CN_AIRC
CN_LEAK
CE/CF Chassis

- 9 -
Copyright ©2014 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
5. DIP Switch Setting
For Multi V Models, DIP switch 1, 2, 6, 8 must be set OFF.
Function Description Setting Off Setting On Default
SW1
SW2
SW3
SW4
SW5
SW6
SW7
SW8
Communication
Cycle
Group Control
Dry Contact Mode
Installation
Heater linkage
Ventilator linkage
Vane selection
(Console)
Region selection
Etc.
N/A (Default)
N/A (Default)
Selection of Master or Slave
Selection of Dry Contact
Mode
Fan continuous operation
N/A
Selection of Ventilator link-
age
Selection of up/down side
Vane
Selection tropical region
Spare
-
-
Master
Wired/Wireless remote
controller
Selection of Manual or Auto
operation Mode
Continuous operation Removall
-
Linkage Removal
Up side + Down side Vane
General model
-
-
-
Slave
Auto
-
-
Working
Up side Vane
Only
Tropical model
-
Off
Off
Off
Off
Off
Off
Off
Off
1. Indoor Unit
2. Outdoor Unit
In case that the products meet specific conditions, “Auto addressing” function can start automatically with the
improved speed by turning the DIP switch #3 of the outdoor unit and resetting the power.
* Specific conditions:
- All names of the indoor units are ARNU****4.
- The serial number of Multi V super IV (outdoor units) is after October 2013.
DIP switch 7 segment
Outdoor Unit PCB Outdoor Unit DIP Switch

- 10 -
Copyright ©2014 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
6. Exploded View
CE (WITH CASE)
135500
W3110
135304
137213A
135304
135500
W3110
749740
268711C
137213B
359012B
359012A
336600B
336600A
346810B
346810A
147780
135511
159830
147780
137211
159830
330871
552570
237204
W6640A
268711A
55211G
W52240
552209
749750
263230A
263230B
263230C
W6631A W6631B
W6631C
W6631D
354210
352118
THERMISTOR 1
THERMISTOR 2
THERMISTOR 3
249951
130911
W50011
268711D
W6640B
237204
SVC No. Description Remark (Color)
263230A Thermistor for room air temperature CN-ROOM (Yellow)
263230B Thermistor for pipe in temperature CN-PIPE_IN (White)
263230C Thermistor for pipe in temperature CN-PIPE_OUT (Red)
268711A PCB for main 210 mm X 95 mm
268711C PCB for option 25 mm X 25 m
268711D PCB for communication 65 mm X 45 mm

- 11 -
Copyright ©2014 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
CE (WITHOUT CASE)
268711C
359012B
359012A
336600B
336600A
346810B
346810A
W4811
135511
159830
137211 159830
330871
W6640A
268711A
55211G
W52240
552209
263230A
263230B
263230C
W6631A W6631B
W6631C
W6631D
354210
130911
352118
THERMISTOR 1
THERMISTOR 2
THERMISTOR 3
249951
W50011 552570
268711D
W6640B
SVC No. Description Remark (Color)
263230A Thermistor for room air temperature CN-ROOM (Yellow)
263230B Thermistor for pipe in temperature CN-PIPE_IN (White)
263230C Thermistor for pipe in temperature CN-PIPE_OUT (Red)
268711A PCB for main 210 mm X 95 mm
268711C PCB for option 25 mm X 25 m
268711D PCB for communication 65 mm X 45 mm

- 12 -
Copyright ©2014 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
CF (WITH CASE)
135500
137213A
W3110
749740
749750
135304
135500
W3110
352118
237204
W50011
137211B
147780
147780
354210
330871
346810
359012A
55211G
137213B
237204
249951
159830
359012B
336600A
336600B W6640B
W6640A
346810
130911
268711A
268711C
W6631A W6631B
W6631C
W6631D
263230A
263230B 263230C
THERMISTOR 1
THERMISTOR 2 THERMISTOR 3
552209
W52240
135511
268711D
552570
137211A
SVC No. Description Remark (Color)
263230A Thermistor for room air temperature CN-ROOM (Yellow)
263230B Thermistor for pipe in temperature CN-PIPE_IN (White)
263230C Thermistor for pipe in temperature CN-PIPE_OUT (Red)
268711A PCB for main 210 mm X 95 mm
268711C PCB for option 25 mm X 25 m
268711D PCB for communication 65 mm X 45 mm

- 13 -
Copyright ©2014 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
CF (WITHOUT CASE)
352118
W50011
354210
330871
346810
359012A
55211G
249951
159830
359012B
336600A
336600B W6640B
W6640A
346810
130911
268711A
268711C
W6631A W6631B
W6631C
W6631D
263230A
263230B 263230C
THERMISTOR 1
THERMISTOR 2 THERMISTOR 3
552209
W52240
137211
135511
268711D
552570
W4811
SVC No. Description Remark (Color)
263230A Thermistor for room air temperature CN-ROOM (Yellow)
263230B Thermistor for pipe in temperature CN-PIPE_IN (White)
263230C Thermistor for pipe in temperature CN-PIPE_OUT (Red)
268711A PCB for main 210 mm X 95 mm
268711C PCB for option 25 mm X 25 m
268711D PCB for communication 65 mm X 45 mm

- 14 -
Copyright ©2014 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
Error Indicator
• This function indicates types of failure in self-diagnosis and occurrence of failure for air condition.
• Error mark is displayed on display window of indoor units and wired remote controller, and 7-segment LED of
outdoor unit control board as shown in the table.
• If more than two troubles occur simultaneously, lower number of error code is first displayed.
• After error occurrence, if error is released, error LED is also released simultaneously.
Error Display
- 1st,2nd,3rd LED of 7-segment indicates error number, 4th LED indicates unit number. Indicates unit number.
(* = 1:Master, 2 : Slave 1, 3 : Slave 2)
Ex) 211 : No.21 error of master unit
213 : No.21 error of slave2
1051 : No.105 error of master unit
hRefer to the DX-Venitilation manual for DX-Venitilation error code
(repetition)
Error Compressor
Error number
Unit(1:Master, 2:Slave 1, 3:Slave 2)
Display Title Cause of Error
Indoor unit related error
0 1 - Air temperature sensor of indoor unit Air temperature sensor of indoor unit is open or short
0 2 - Inlet pipe temperature sensor of indoor unit Inlet pipe temperature sensor of indoor unit is open or short
0 3 - Communication error : wired remote controller ↔
indoor unit Failing to receive wired remote controller signal in indoor unit PCB
0 4 - Drain pump Malfunction of drain pump
0 5 - Communication error : Indoor communication
PCB ↔indoor unit
Indoor Unit PCB did not receive signal from Indoor
communication PCB for over 3 minutes continuously
0 6 - Outlet pipe temperature sensor of indoor unit Outlet pipe temperature sensor of indoor unit is open or short
0 9 - Indoor EEPROM Error In case when the serial number marked on EEPROM of
Indoor unit is 0 or FFFFFF
1 0 - Poor fan motor operation Disconnecting the fan motor connector / Failure of indoor
fan motor lock
2 3 0 Refrigerant leakage sensing error Refrigerant leakage sensing error and sensor defect error
2 3 7 Communication defect in indoor communication
PCB ↔outdoor communication PCB
Indoor communication PCB did not receive signal from outdoor
communication PCB for over 3 minutes continuously
2 3 8 Communication error in outdoor communication
PCB ↔outdoor unit
Outdoor communication PCB did not receive communication sig-
nal from outdoor unit for over 3 minutes continuously
7. Self-diagnosis function

P/NO : MFL42947637 DECEMBER, 2014