LG ARUN040GSS0 User manual

Please read this manual carefully before operating
your set and retain it for future reference.
EXPLODED VIEW
ARUN040GSS0 ARUN050GSS0 ARUN060GSS0
ARUN040LSS0 ARUN050LSS0 ARUN060LSS0
ARUN080LSS0 ARUN100LSS0 ARUN120LSS0
ARUV140LSS0
P/NO : MFL42395723
SERVICE MANUAL
AIR
CONDITIONER

Copyright ©2014 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
- 2 -
1. Specification .................................................................................3
2. Functions ......................................................................................6
3. Dimensions ...................................................................................7
4. Piping Diagrams .........................................................................10
5. Wiring Diagrams.........................................................................22
6. Exploded View ............................................................................28
ARUN Series

Copyright ©2014 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
- 3 -
1. Specification
Specification
HP
Model Name Combination Unit
Capacity
1)
(Rated)
Cooling
kW
kcal/h
Btu/h
Heating
kW
kcal/h
Btu/h
Input (Rated)
1)
Cooling kW
Heating kW
EER
COP
Power Factor 6) Rated -
Casing Color
Heat Exchanger
Compressor
Type
Piston Displacement cm3/rev
Number of Revolution rev/min
Motor Output W
Starting Method
Oil Type
Oil Charge
Fan
Type
Motor Output x Number W
Air Flow Rate(High) m3/min
ft3/min
Drive
Discharge Side / Top
Piping
Connections
Liquid mm(inch)
Gas mm(inch)
Dimensions(W x H x D) mm
inch
Net Weight kg
lbs
Sound Pressure
Level
Cooling dB(A)
Heating dB(A)
Sound Power Level dB(A)
Protection
Devices
High pressure
protection -
High pressure sensor /
High pressure switch
High pressure sensor /
High pressure switch
High pressure sensor /
High pressure switch
Comperssor/ Fan -
Over-heat protection /
Fan driver overload protector
Over-heat protection /
Fan driver overload protector
Over-heat protection /
Fan driver overload protector
Inverter -
Over-heat protection /
Over-current protection
Over-heat protection /
Over-current protection
Over-heat protection /
Over-current protection
Communication Cable No.xmm
2
(VCTF-SB)
Refrigerant
Refrigerant name
Precharged Amount kg
lbs
Control
Power Supply V, Ø, Hz
Number of maxmum connectable indoor units 2)
Notes:
1. Eurovent Test Condition : Maximum 4 Indoor units are connected (Indoor unit type
is only Ceiling Concealed Duct)
- Refer to EUROVENT certification regulation for more detail test conditions.
- Performances of Combination units are sum of Independent unit(Outdoor Units).
2. Performances are based on the following conditions :
- Cooling Temperature : Indoor 27°C(80.6°F) DB / 19°C(66.2°F) WB
Outdoor 35°C(95°F) DB / 24°C(75.2°F) WB
- Heating Temperature : Indoor 20°C(68°F) DB / 15°C(59°F) WB
Outdoor 7°C(44.6°F) DB / 6°C(42.8°F) WB
- Piping Length : Interconnected Pipe Length = 7.5m
- Difference Limit of Elevation (Outdoor ~ Indoor Unit) is Zero.
3. The maximum combination ratio is 160%.
4. Wiring cable size must comply with the applicable local and national codes.
5.
Due to our policy of innovation some specifications may be changed without notification.
6. Sound Level Values are measured at Anechoic chamber. Therefore, these values
can be increased owing to ambient conditions during operation.
7. Power factor could vary less than ±1% according to the operating conditions.
8. This product contains Fluorinated greenhouse gases.
456
ARUN040GSS0 ARUN050GSS0 ARUN060GSS0
12.1 14.0 15.5
10,400 12,000 13,300
41,200 47,800 52,900
12.5 16.0 18.0
10,800 13,800 15,500
42,700 54,600 61,400
3.57 3.51 4.18
2.91 3.60 4.31
3.39 3.99 3.71
4.3 4.44 4.18
0.93 0.93 0.93
Warm Gray Warm Gray Warm Gray
Gold fin Gold fin Gold fin
BLDC Inverter Twin Rotary BLDC Inverter Twin Rotary BLDC Inverter Twin Rotary
44.2 44.2 44.2
3,600 3,600 3,600
4,000 4,000 4,000
DC Inverter Starting DC Inverter Starting DC Inverter Starting
FVC68D(PVE) FVC68D(PVE) FVC68D(PVE)
1,300 1,300 1,300
Axial Flow Fan Axial Flow Fan Axial Flow Fan
124 x 1 124 x 2 124 x 2
60 110 110
2,119 3,885 3,885
DC INVERTER DC INVERTER DC INVERTER
Side Side Side
Ø 9.52(3/8) Ø 9.52(3/8) Ø 9.52(3/8)
Ø 15.88(5/8) Ø 15.88(5/8) Ø 19.05(3/4)
950 × 834 × 330 950 × 1,380 × 330 950 × 1,380 × 330
37-13/32 × 32-27/32 × 13 37-13/32 × 54-11/32 × 13 37-13/32 × 54-11/32 × 13
69 94 94
152 207 207
50 51 52
52 53 54
62 66 67
2C x 1.0 ~ 1.5 2C x 1.0 ~ 1.5 2C x 1.0 ~ 1.5
R410A R410A R410A
1.8 3.0 3.0
4.0 6.6 6.6
Electronic Expansion Valve Electronic Expansion Valve Electronic Expansion Valve
220-240 , 1 , 50 220-240 , 1 , 50 220-240 , 1 , 50
220, 1, 60 220, 1, 60 220, 1, 60
81013

Specification
Copyright ©2014 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
- 4 -
Notes:
1. Eurovent Test Condition : Maximum 4 Indoor units are connected (Indoor unit type
is only Ceiling Concealed Duct)
- Refer to EUROVENT certification regulation for more detail test conditions.
- Performances of Combination units are sum of Independent unit(Outdoor Units).
2. Performances are based on the following conditions :
- Cooling Temperature : Indoor 27°C(80.6°F) DB / 19°C(66.2°F) WB
Outdoor 35°C(95°F) DB / 24°C(75.2°F) WB
- Heating Temperature : Indoor 20°C(68°F) DB / 15°C(59°F) WB
Outdoor 7°C(44.6°F) DB / 6°C(42.8°F) WB
- Piping Length : Interconnected Pipe Length = 7.5m
- Difference Limit of Elevation (Outdoor ~ Indoor Unit) is Zero.
3. The maximum combination ratio is 160%.
4. Wiring cable size must comply with the applicable local and national codes.
5.
Due to our policy of innovation some specifications may be changed without notification.
6. Sound Level Values are measured at Anechoic chamber. Therefore, these values
can be increased owing to ambient conditions during operation.
7. Power factor could vary less than ±1% according to the operating conditions.
8. This product contains Fluorinated greenhouse gases.
HP
Model Name Combination Unit
Capacity
1)
(Rated)
Cooling
kW
kcal/h
Btu/h
Heating
kW
kcal/h
Btu/h
Input (Rated)
1)
Cooling kW
Heating kW
EER
COP
Power Factor 6) Rated -
Casing Color
Heat Exchanger
Compressor
Type
Piston Displacement cm3/rev
Number of Revolution rev/min
Motor Output W
Starting Method
Oil Type
Oil Charge
Fan
Type
Motor Output x Number W
Air Flow Rate(High) m3/min
ft3/min
Drive
Discharge Side / Top
Piping
Connections
Liquid mm(inch)
Gas mm(inch)
Dimensions(W x H x D) mm
inch
Net Weight kg
lbs
Sound Pressure
Level
Cooling dB(A)
Heating dB(A)
Sound Power Level dB(A)
Protection
Devices
High pressure
protection -
High pressure sensor /
High pressure switch
High pressure sensor /
High pressure switch
High pressure sensor /
High pressure switch
Comperssor/ Fan -
Over-heat protection /
Fan driver overload protector
Over-heat protection /
Fan driver overload protector
Over-heat protection /
Fan driver overload protector
Inverter -
Over-heat protection /
Over-current protection
Over-heat protection /
Over-current protection
Over-heat protection /
Over-current protection
Communication Cable No.xmm
2
(VCTF-SB)
Refrigerant
Refrigerant name
Precharged Amount kg
lbs
Control
Power Supply V, Ø, Hz
Number of maxmum connectable indoor units 2)
456
ARUN040LSS0 ARUN050LSS0 ARUN060LSS0
12.1 14.0 15.5
10,400 12,000 13,300
41,200 47,800 52,900
12.5 16.0 18.0
10,800 13,800 15,500
42,700 54,600 61,400
2.88 3.56 4.18
2.79 3.60 4.31
4.20 3.93 3.71
4.48 4.44 4.18
0.93 0.93 0.93
Warm Gray Warm Gray Warm Gray
Gold fin Gold fin Gold fin
BLDC Inverter Twin Rotary BLDC Inverter Twin Rotary BLDC Inverter Twin Rotary
44.2 44.2 44.2
3,600 3,600 3,600
4,000 4,000 4,000
DC Inverter Starting DC Inverter Starting DC Inverter Starting
FVC68D(PVE) FVC68D(PVE) FVC68D(PVE)
1,300 1,300 1,300
Axial Flow Fan Axial Flow Fan Axial Flow Fan
124 x 2 124 x 2 124 x 2
110 110 110
3,885 3,885 3,885
DC INVERTER DC INVERTER DC INVERTER
Side Side Side
Ø 9.52(3/8) Ø 9.52(3/8) Ø 9.52(3/8)
Ø 15.88(5/8) Ø 15.88(5/8) Ø 19.05(3/4)
950 × 1,380 × 330 950 × 1,380 × 330 950 × 1,380 × 330
37-13/32 × 54-11/32 × 13 37-13/32 × 54-11/32 × 13 37-13/32 × 54-11/32 × 13
96 96 96
212 212 212
50 51 52
52 53 54
63 66 67
2C x 1.0 ~ 1.5 2C x 1.0 ~ 1.5 2C x 1.0 ~ 1.5
R410A R410A R410A
3.0 3.0 3.0
6.6 6.6 6.6
Electronic Expansion Valve Electronic Expansion Valve Electronic Expansion Valve
380-415 , 3 , 50 380-415 , 3 , 50 380-415 , 3 , 50
380, 3, 60 380, 3, 60 380, 3, 60
81013

Specification
Copyright ©2014 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
- 5 -
HP 810 12 14
Model Name Combination Unit ARUN080LSS0 ARUN100LSS0 ARUN120LSS0 ARUV140LSS0
Capacity
1)
(Rated)
Cooling
kW 22.4 28.0 33.6 38.0
kcal/h 19,300 24,100 28,900 32,700
Btu/h 76,400 95,900 114,700 129,700
Heating
kW 24.5 30.6 36.7 -
kcal/h 21,100 26,300 31,600 -
Btu/h 83,600 104,400 125,200 -
Input
(Rated)
1)
Cooling kW 6.27 8.70 10.50 11.88
Heating kW 6.28 7.56 9.66 -
EER 3.57 3.22 3.20 3.20
COP 3.90 4.05 3.80 -
Power Factor 6) Rated - 0.93 0.93 0.93 0.93
Casing Color Warm Gray Warm Gray Warm Gray Warm Gray
Heat Exchanger Gold fin Gold fin Gold fin Gold fin
Compressor
Type Hermetically Sealed Scroll Hermetically Sealed Scroll Hermetically Sealed Scroll Hermetically Sealed Scroll
Piston Displacement cm3/rev 43.8 62.1 62.1 62.1
Number of Revolution rev/min 3,600 3,600 3,600 3,600
Motor Output W 4,200 5,300 5,300 5,300
Starting Method Direct On Line Direct On Line Direct On Line Direct On Line
Oil Type FVC68D(PVE) FVC68D(PVE) FVC68D(PVE) FVC68D(PVE)
Oil Charge 2,400 2,600 3,400 3,400
Fan
Type Propeller fan Propeller fan Propeller fan Propeller fan
Motor Output x Number W 124 x 2 250 x 2 250 x 2 250 x 2
Air Flow
Rate(High)
m3/min 140 190 190 190
ft3/min 4,944 6,710 6,710 6,710
Drive DC INVERTER DC INVERTER DC INVERTER DC INVERTER
Discharge Side / Top Side Side Side Side
Piping
Connections
Liquid mm(inch) Ø 9.52(3/8) Ø 9.52(3/8) Ø 12.7(1/2) Ø 12.7(1/2)
Gas mm(inch) Ø 19.05(3/4) Ø 22.2(7/8) Ø 28.58(1 1/8) Ø 28.58(1 1/8)
Dimensions(W x H x D) mm
950 × 1,380 × 330 1,090 × 1,625 × 380 1,090 x 1,625 x 380 1,090 x 1,625 x 380
inch 37-13/32 × 54-11/32 × 13 42-29/32 × 63-31/32 × 14-31/32 42-29/32 × 63-31/32 × 14-31/32 42-29/32 × 63-31/32 × 14-31/32
Net Weight kg
115 144 157 157
lbs 254 317 346 346
Sound Pressure
Level
Cooling dB(A) 57 58 60 61
Heating dB(A) 57 58 60 -
Sound Power Level dB(A) 69 70 71 74
Protection
Devices
High pressure
protection -
High pressure sensor /
High pressure switch
High pressure sensor /
High pressure switch
High pressure sensor /
High pressure switch
High pressure sensor /
High pressure switch
Comperssor/
Fan -
Over-heat protection /
Fan driver overload protector
Over-heat protection /
Fan driver overload protector
Over-heat protection /
Fan driver overload protector
Over-heat protection /
Fan driver overload protector
Inverter -
Over-heat protection /
Over-current protection
Over-heat protection /
Over-current protection
Over-heat protection /
Over-current protection
Over-heat protection /
Over-current protection
Communication Cable No.xmm
2
(VCTF-SB) 2C x 1.0 ~ 1.5 2C x 1.0 ~ 1.5 2C x 1.0 ~ 1.5 2C x 1.0 ~ 1.5
Refrigerant
Refrigerant name R410A R410A R410A R410A
Precharged
Amount
kg 3.5 4.5 6.0 6.0
lbs 7.7 9.9 13.2 13.2
Control Electronic Expansion Valve Electronic Expansion Valve Electronic Expansion Valve Electronic Expansion Valve
Power Supply V, Ø, Hz
380-415 , 3 , 50 380-415 , 3 , 50 380-415 , 3 , 50 380-415, 3, 50
380 , 3 , 60 380 , 3 , 60 380 , 3 , 60 380, 3, 60
Number of maxmum connectable indoor units 2) 13 16 20 23
Notes:
1. Eurovent Test Condition : Maximum 4 Indoor units are connected (Indoor unit type
is only Ceiling Concealed Duct)
- Refer to EUROVENT certification regulation for more detail test conditions.
- Performances of Combination units are sum of Independent unit(Outdoor Units).
2. Performances are based on the following conditions :
- Cooling Temperature : Indoor 27°C(80.6°F) DB / 19°C(66.2°F) WB
Outdoor 35°C(95°F) DB / 24°C(75.2°F) WB
- Heating Temperature : Indoor 20°C(68°F) DB / 15°C(59°F) WB
Outdoor 7°C(44.6°F) DB / 6°C(42.8°F) WB
- Piping Length : Interconnected Pipe Length = 7.5m
- Difference Limit of Elevation (Outdoor ~ Indoor Unit) is Zero.
3. The maximum combination ratio is 160%.
4. Wiring cable size must comply with the applicable local and national codes.
5.
Due to our policy of innovation some specifications may be changed without notification.
6. Sound Level Values are measured at Anechoic chamber. Therefore, these values
can be increased owing to ambient conditions during operation.
7. Power factor could vary less than ±1% according to the operating conditions.
8. This product contains Fluorinated greenhouse gases.

Copyright ©2014 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
- 6 -
Functions
2. Functions
Note :
O: Applied, X: Not applied
Note :
O: Applied, X: Not applied
Accessory model name : Installed at field, ordered and purchased separately by the corresponding model name, supplied with separate package.
Category Functions Multi V S
Reliability
Defrost / Deicing O
High pressure switch O
Phase protection O
Restart delay (3-minutes) O
Self diagnosis O
Soft start O
Test Run function X
Convenience Night Silent Operation O
CAC network function Network solution(LGAP) O
Device Multi V S
Central Controller
AC Ez (Simple Controller) PQCSZ250S0
AC Smart ll PQCSW320A1E
AC Smart Premium PQCSW421E0A
128 Unit Expansion Kit for AC Smart PQCSE440U0
Option Kit (SD card type) for AC Smart PQCSE341A0 / PQCSE342A0
ACP(Advanced Control Platform) PQCPA11A0E / PQCPB11A0E
AC Manager PQCSS520A0E
ACP(Advanced Control Platform) Standard PQCPC22N0
ACP(Advanced Control Platform) Premium PQCPC22A0
AC Manager Plus PQCSSA21E0
DO(Digital Output) Kit PQNFP00T0
BNU
(Building Network Unit)
LONWORKS Gateway (DC 12V Adapter) PQNFB16A1 / PLNWKB000
LONWORKS Gateway (AC 24 V) X
BACnet Gateway (DC 12V Adapter) PQNFB17B0 / PQNFB17C0
BACnet Gateway (AC 24 V) X
Installation Refrigerant Charging Kit O (Logical operation)
Variable Water Flow Control Kit X
PDI(power distribution indicator) PQNUD1S00
PDI(power distribution indicator) Premium PQNUD1S40
Cool / Heat Selector PRDSBM
IO Module (ODU Dry Contact) PVDSMN000
Low Ambient Kit X
Cycle Monitoring Device LG MV PRCT-FE1
Mobile LGMV(Bluetooth) PMVBTDQ01
DS(Data Saving) Module PVADTN000
Internet Bridge PWFMDB000
nBasic functions
nNetwork solution Accessory List

Copyright ©2014 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
- 7 -
3. Dimensions
Dimensions
ARUN100LSS0 / ARUV140LSS0 /
ARUN120LSS0
U7
380
401
1,090
700
20
667
1,625
180
170
445
1,610
242
(Unit : mm)

Dimensions
Copyright ©2014 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
- 8 -
ARUN080LSS0 ARUN060LSS0 ARUN050LSS0 ARUN040LSS0
ARUN060GSS0 ARUN050GSS0
U3
(Unit : mm)

Dimensions
Copyright ©2014 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
- 9 -
ARUN040GSS0
U3
1 FAN MODEL

Copyright ©2014 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
- 10 -
Piping Diagrams
4. Piping Diagrams
Cooling Operation
EEV
Fil ter
EEV
Fil ter
ss
EEV
Solenoid valve
SVC Valve
Indoor HEX Indoor HEX
Fan
Indoor Unit Indoor Unit
Pressure Sensor
Pressure Switch
Temperature Sensor
Remarks Strainer
Fan
DCDC
S
Outdoor
Temperature
Sensor
Outdoor
EEV
HIgh
Pressure
Switch
HIgh
Pressure
Sensor
Low
ARUV140LSS0
Pressure
Sensor
Hot Gas
Valve
Accumulator
Inverter
Sub-Cooler
Compressor
Suction
Temperature
Sensor
Comp
Discharge
Temperature
Sensor
Sub-cooling Circit
Oulet Temperature
Sensor
Outdoor Unit
HEX Temperature
Sensor
Chatging
Port
Liquid Pipe
Temperature
Sensor
4.1 ARUN100LSS0/ARUN120LSS0/ARUV140LSS0

Copyright ©2014 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
- 11 -
EEV
Fil ter
EEV
Fil ter
ss
EEV
Soleno id valve
SVC Valve
Indoor HEX
Indoor Unit
Indoor HEX
Indoor Unit
Pressure Sensor
Pressure Switch
Temperature Sensor
Remarks Strainer
Fan Fan
DCDC
S
Outdoor
Temperature
Sensor
Outdoor
EEV
HIgh
Pressure
Switch
HIgh
Pressure
Sensor
Low
Pressure
Sensor
Hot Gas
Valve
Accumulator
Inverter
Compressor
Sub-Cooler
Suction
Temperature
Sensor
Comp
Discharge
Temperature
Sensor
Sub-cooling Circit
Oulet Temperature
Sensor
Outdoor Unit
HEX Temperature
Sensor
Chatging
Port
Liquid Pipe
Temperature
Sensor
Heating Operation
Piping Diagrams

Copyright ©2014 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
- 12 -
Piping Diagrams
Fil ter Fil ter
ss
EEV
Soleno id valve
SVC Valve
Indoor Unit Indoor Unit
Pressure Sensor
Pressure Switch
Temperature Sensor
Remarks
Strainer
Fan Fan
Indoor HEX Indoor HEXEEV EEV
DCDC
S
Outdoor
Temperature
Sensor
Outdoor
EEV
HIgh
Pressure
Switch
HIgh
Pressure
Sensor
Low
Pressure
Sensor
Hot Gas
Valve
Accumulator
Inverter
Sub-Cooler
Compressor
Suction
Temperature
Sensor
Comp
Discharge
Temperature
Sensor
Sub-cooling Circit
Oulet Temperature
Sensor
Outdoor Unit
HEX Temperature
Sensor
Chatging
Port
Liquid Pipe
Temperature
Sensor
Oil Return/ Defrost Operation

Piping Diagrams
Copyright ©2014 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
- 13 -
MM
Indoor HEX EEV EEVIndoor HEX
Fan Fan
Indoor Unit Indoor Unit
Remarks
Pressure Sensor Temperature Sensor Solenoid valve
Strainer
Pressure Sensor SVC Valve
DCDC
S
Outdoor
Temperature
Sensor
Outdoor
EEV
HIgh
Pressure
Switch
HIgh
Pressure
Sensor
Low
Pressure
Sensor
Hot Gas
Valve
Accumulator
Inverter
Compressor
Sub-Cooler
Suction
Temperature
Sensor
Comp
Discharge
Temperature
Sensor
Sub-cooling Circit
Oulet Temperature
Sensor
Outdoor Unit
HEX Temperature
Sensor
Charging
Port
Liquid Pipe
Temperature
Sensor
Oil
Seperater
Cooling Operation
4.2 ARUN080LSS0

Piping Diagrams
Copyright ©2014 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
- 14 -
Heating Operation
M M
Indoor HEX EEV EEVIndoor HEX
Fan Fan
Indoor Unit Indoor Unit
Remarks
Pressure Sensor Temperature Sensor Solenoid valve
Strainer
Pressure Sensor SVC Valve
DCDC
S
Outdoor
Temperature
Sensor
Outdoor
EEV
HIgh
Pressure
Switch
HIgh
Pressure
Sensor
Low
Pressure
Sensor
Hot Gas
Valve
Accumulator
Inverter
Compressor
Sub-Cooler
Suction
Temperature
Sensor
Comp
Discharge
Temperature
Sensor
Sub-cooling Circit
Oulet Temperature
Sensor
Outdoor Unit
HEX Temperature
Sensor
Liquid Pipe
Temperature
Sensor
Oil
Seperater
Charging
Port

Piping Diagrams
Copyright ©2014 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
- 15 -
M M
Indoor HEX EEV EEVIndoor HEX
Fan Fan
Indoor Unit Indoor Unit
Remarks
Pressure Sensor Temperature Sensor Solenoid valve
Strainer
4-Way Valve
Pressure Sensor SVC Valve
DCDC
S
Outdoor
Temperature
Sensor
Outdoor
EEV
HIgh
Pressure
Switch
HIgh
Pressure
Sensor
Low
Pressure
Sensor
Hot Gas
Valve
Accumulator
Inverter
Compressor
Sub-Cooler
Suction
Temperature
Sensor
Comp
Discharge
Temperature
Sensor
Sub-cooling Circit
Oulet Temperature
Sensor
Outdoor Unit
HEX Temperature
Sensor
Charging
Port
Liquid Pipe
Temperature
Sensor
Oil
Seperater
Oil Return/ Defrost Operation

Piping Diagrams
Copyright ©2014 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
- 16 -
4.3 ARUN050GSS0, ARUN060GSS0, ARUN040LSS0
ARUN050LSS0, ARUN060LSS0
MM
Indoor HEX EEV EEVIndoor HEX
Fan Fan
Indoor Unit Indoor Unit
4-Way Valve
Suction
Temperature
Sensor
High Pressure
Switch
Outdoor
EEV
Sub-cooling Circuit
Outlet Temperature
Sensor
Accumulator
Liquid Pipe
Temperature sensor
Sub-Cooler
Remarks
Pressure Sensor Temperature Sensor Solenoid valve
Strainer
Outdoo r Uni t
Pressure Sensor SVC Valve
Sub-Cooling EEV
Inverter Compressor
Comp
Discharge
Temperature
Sensor
Low Pressure Sensor
Oil
Separator
Charging
Port
Hot Gas
Valve
Gas Pipe
Liquid Pipe
High Temp. High Pressure Gas
High Temp. High Pressure Liquid
Low Temp. Low Pressure Gas
Fan
Outdoor
Temperature
Sensor
Outdoor Unit
HEX Temperature
Sensor
Fan
Cooling Operation

Piping Diagrams
Copyright ©2014 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
- 17 -
Heating Operation
M M
Indoor HEX EEV EEVIndoor HEX
Fan Fan
Fan
Outdoor
Temperature
Sensor
Outdoor Unit
HEX Temperature
Sensor
Fan
Indoor Unit Indoor Unit
4-Way Valve
Suction
Temperature
Sensor
High Pressure
Switch
Outdoor
EEV
Sub-cooling Circuit
Outlet Temperature
Sensor
Accumulator
Liquid Pipe
Temperature sensor
Sub-Cooler
Remarks
Pressure Sensor Temperature Sensor Solenoid valve
Strainer
Outdoo r Unit
Pressure Sensor SVC Valve
Sub-Cooling EEV
Inverter Compressor
Comp
Discharge
Temperature
Sensor
Low Pressure Sensor
Oil
Separator
Charging
Port
Hot Gas
Valve
Gas Pipe
Liquid Pipe
High Temp. High Pressure Gas
High Temp. High Pressure Liquid
Low Temp. Low Pressure Gas

Piping Diagrams
Copyright ©2014 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
- 18 -
M M
Indoor HEX EEV EEVIndoor HEX
Fan Fan
Indoor Unit Indoor Unit
4-Way Valve
Suction
Temperature
Sensor
High Pressure
Switch
Outdoor
EEV
Sub-cooling Circuit
Outlet Temperature
Sensor
Accumulator
Liquid Pipe
Temperature sensor
Sub-Cooler
Remarks
Pressure Sensor Temperature Sensor Solenoid valve
Strainer
4-Way Valve
Outdoor Unit
Pressure Sensor SVC Valve
Sub-Cooling EEV
Inverter Compressor
Comp
Discharge
Temperature
Sensor
Low Pressure Sensor
Oil
Separator
Charging
Port
Hot Gas
Valve
Gas Pipe
Liquid Pipe
High Temp. High Pressure Gas
High Temp. High Pressure Liquid
Low Temp. Low Pressure Gas
Fan
Outdoor
Temperature
Sensor
Outdoor Unit
HEX Temperature
Sensor
Fan
Oil Return/ Defrost Operation

Copyright ©2014 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
- 19 -
Piping Diagrams
MM
Indoor HEX EEV EEVIndoor HEX
Fan Fan
Indoor Unit Indoor Unit
4-Way Valve
Suction
Temperature
Sensor
High Pressure
Switch
Outdoor
EEV
Sub-cooling Circuit
Outlet Temperature
Sensor
Accumulator
Liquid Pipe
Temperature sensor
Sub-Cooler
Remarks
Pressure Sensor Temperature Sensor Solenoid valve
EEV Strainer
Outdoor Unit
Pressure Sensor SVC Valve
Sub-Cooling EEV
Inverter Compressor
Comp
Discharge
Temperature
Sensor
Low Pressure Sensor
Oil
Separator
Charging
Port
Hot Gas
Valve
Gas Pipe
Liquid Pipe
High Temp. High Pressure Gas
High Temp. High Pressure Liquid
Low Temp. Low Pressure Gas
Fan
Outdoor
Temperature
Sensor
Outdoor Unit
HEX Temperature
Sensor
Cooling Operation
4.4 ARUN040GSS0

Copyright ©2014 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
- 20 -
Piping Diagrams
Heating Operation
M M
Indoor HEX EEV EEVIndoor HEX
Fan Fan
Indoor Unit Indoor Unit
4-Way Valve
Suction
Temperature
Sensor
High Pressure
Switch
Outdoor
EEV
Sub-cooling Circuit
Outlet Temperature
Sensor
Accumulator
Liquid Pipe
Temperature sensor
Sub-Cooler
Remarks
Pressure Sensor Temperature Sensor Solenoid valve
EEV Strainer
Outdoor Unit
Pressure Sensor SVC Valve
Sub-Cooling EEV
Inverter Compressor
Comp
Discharge
Temperature
Sensor
Low Pressure Sensor
Oil
Separator
Charging
Port
Hot Gas
Valve
Gas Pipe
Liquid Pipe
High Temp. High Pressure Gas
High Temp. High Pressure Liquid
Low Temp. Low Pressure Gas
Fan
Outdoor
Temperature
Sensor
Outdoor Unit
HEX Temperature
Sensor