LG ARUN Series User manual

System
Outdoor Unit
SERVICE MANUAL R410A
MODEL : ARUN Series
CAUTION
Before Servicing the unit, read the safety precautions in General SVC manual.
Only for authorized service personnel.
Internal Use Only
http://biz.lgservice.com
R410A

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Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
Air Conditioner Service Manual
TABLE OF CONTENTS
Safety Precautions............................................................................................................................3
Part 1 General Information .............................................................................................................10
Model Names .............................................................................................................................11
External Appearance .................................................................................................................12
Combination of Outdoor Units .................................................................................................14
Nomenclature .............................................................................................................................15
Outdoor Units Information ........................................................................................................16
Part 2 Outdoor Units ................................................................................................................19
Part 3 PCB Setting and Test Run ........................................................................................57
Part 4 Trouble shooting guide ............................................................................................. 69

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Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
Safety Precautions
Safety Precautions
To prevent injury to the user or other people and property damage, the following instructions must
be followed.
■Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is
classified by the following indications.
■Meanings of symbols used in this manual are as shown below.
WARNING
CAUTION
This symbol indicates the possibility of death or serious injury.
This symbol indicates the possibility of injury or damage to properties only.
Be sure not to do.
Be sure to follow the instruction.
WARNING
■Installation
Have all electric work done by a licensed
electrician according to "Electric Facility
Engineering Standard" and "Interior Wire
Regulations" and the instructions given in
this manual and always use a special circuit.
• If the power source capacity is inadequate or
electric work is performed improperly, electric
shock or fire may result.
Ask the dealer or an authorized technician to
install the air conditioner.
• Improper installation by the user may result in
water leakage, electric shock, or fire.
Always ground the product.
• There is risk of fire or electric shock.
Always intstall a dedicated circuit and breaker.
• Improper wiring or installation may cause fire or
electric shock.

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Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
Safety Precautions
For re-installation of the installed product,
always contact a dealer or an Authorized
Service Center.
• There is risk of fire, electric shock, explosion, or
injury.
Do not install, remove, or re-install the unit
by yourself (customer).
• There is risk of fire, electric shock, explosion, or
injury.
Do not store or use flammable gas or
combustibles near the air conditioner.
• There is risk of fire or failure of product.
Use the correctly rated breaker or fuse.
• There is risk of fire or electric shock.
Prepare for strong wind or earthquake and
install the unit at the specified place.
• Improper installation may cause the unit to top-
ple and result in injury.
Do not install the product on a defective
installation stand.
• It may cause injury, accident, or damage to the
product.
When installing and moving the air condition-
er to another site, do not charge it with a
different refrigerant from the refrigerant
specified on the unit.
• If a different refrigerant or air is mixed with the
original refrigerant, the refrigerant cycle may
malfunction and the unit may be damaged.
Do not reconstruct to change the settings of
the protection devices.
• If the pressure switch, thermal switch, or other
protection device is shorted and operated
forcibly, or parts other than those specified by
LGE are used, fire or explosion may result.
Gasolin
R22
R407C
R410A

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Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
■Operation
Safety Precautions
Ventilate before operating air conditioner
when gas leaked out.
• It may cause explosion, fire, and burn.
Securely install the cover of control box and
the panel.
• If the cover and panel are not installed securely,
dust or water may enter the outdoor unit and fire
or electric shock may result.
If the air conditioner is installed in a small room, measures must be taken to prevent the
refrigerant concentration from exceeding the safety limit when the refrigerant leaks.
• Consult the dealer regarding the appropriate measures to prevent the safety limit from being exceed-
ed. Should the refrigerant leak and cause the safety limit to be exceeded, harzards due to lack of oxy-
gen in the room could result.
Do not damage or use an unspecified power
cord.
• There is risk of fire, electric shock, explosion, or
injury.
Use a dedicated outlet for this appliance.
• There is risk of fire or electrical shock.
Be cautious that water could not enter the
product.
• There is risk of fire, electric shock, or product
damage.
Do not touch the power switch with wet
hands.
• There is risk of fire, electric shock, explosion, or
injury.

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Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
CAUTION
■Installation
Safety Precautions
When the product is soaked (flooded or
submerged), contact an Authorized Service
Center.
• There is risk of fire or electric shock.
Be cautious not to touch the sharp edges
when installing.
• It may cause injury.
Take care to ensure that nobody could step
on or fall onto the outdoor unit.
• This could result in personal injury and product
damage.
Do not open the inlet grille of the product
during operation. (Do not touch the electro-
static filter, if the unit is so equipped.)
• There is risk of physical injury, electric shock, or
product failure.
Always check for gas (refrigerant) leakage
after installation or repair of product.
• Low refrigerant levels may cause failure of
product.
Do not install the product where the noise or
hot air from the outdoor unit could damage
the neighborhoods.
• It may cause a problem for your neighbors.
Keep level even when installing the product.
• To avoid vibration or water leakage.
Do not install the unit where combustible gas
may leak.
• If the gas leaks and
accumulates around the
unit, an explosion may
result.
90˚
Gasolin

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Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
Safety Precautions
Use power cables of sufficient current
carrying capacity and rating.
•Cables that are too small may leak, generate
heat, and cause a fire.
Do not use the product for special purposes,
such as preserving foods, works of art, etc. It
is a consumer air conditioner, not a precision
refrigeration system.
•There is risk of damage or loss of property.
Keep the unit away from children. The heat
exchanger is very sharp.
•It can cause the injury, such as cutting the finger.
Also the damaged fin may result in degradation
of capacity.
When installting the unit in a hospital, com-
munication station, or similar place, provide
sufficient protection against noise.
• The inverter equipment, private power generator,
high-frequency medical equipment, or radio com-
munication equipment may cause the air condition-
er to operate erroneously, or fail to operate. On the
other hand, the air conditioner may affect such
equipment by creating noise that disturbs medical
treatment or image broadcasting.
Do not install the product where it is exposed to sea wind (salt spray) directly.
•It may cause corrosion on the product. Corrosion, particularly on the condenser and evaporator fins,
could cause product malfunction or inefficient operation.

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Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
Safety Precautions
■Operation
Do not use the air conditioner in special
environments.
•Oil, steam, sulfuric smoke, etc. can significantly
reduce the performance of the air conditioner or
damage its parts.
Do not block the inlet or outlet.
•It may cause failure of appliance or accident.
Make the connections securely so that the
outside force of the cable may not be applied
to the terminals.
•Inadequate connection and fastening may gen-
erate heat and cause a fire.
Be sure the installation area does not deteri-
orate with age.
•If the base collapses, the air conditioner could
fall with it, causing property damage, product
failure, or personal injury.
Install and insulate the drain hose to ensure that water is drained away properly based on the
installation manual.
•A bad connection may cause water leakage.
Be very careful about product transportation.
•Only one person should not carry the product if it weighs more
than 20 kg.
•Some products use PP bands for packaging. Do not use any PP
bands for a means of transportation. It is dangerous.
•Do not touch the heat exchanger fins. Doing so may cut your fin-
gers.
•When transporting the outdoor unit, suspending it at the specified
positions on the unit base. Also support the outdoor unit at four
points so that it cannot slip sideways.

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Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
Safety Precautions
Safely dispose of the packing materials.
• Packing materials, such as nails and other metal or
wooden parts, may cause stabs or other injuries.
•
Tear apart and throw away plastic packaging bags
so that children may not play with them. If children
play with a plastic bag which was
not torn apart, they face the
risk of suffocation.
Turn on the power at least 6 hours before
starting operation.
•Starting operation immediately after turning on
the main power switch can result in severe
damage to internal parts. Keep the power switch
turned on during the operational season.
Do not touch any of the refrigerant piping
during and after operation.
•It can cause a burn or frostbite.
Do not operate the air conditioner with the
panels or guards removed.
•Rotating, hot, or high-voltage parts can cause
injuries.
Do not directly turn off the main power
switch after stopping operation.
•Wait at least 5 minutes before turning off the
main power switch. Otherwise
it may result in water leakage
or other problems.
Auto-addressing should be done in condition of
connecting the power of all indoor and outdoour
units. Auto-addressing should also be done in
case of changing the indoor unit PCB.
Use a firm stool or ladder when cleaning or
maintaining the air conditioner.
•Be careful and avoid personal injury.
Do not insert hands or other objects through
the air inlet or outlet while the air conditioner
is plugged in.
•There are sharp and moving parts that could
cause personal injury.

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Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
Part 1
General Information
1. Model Names ................................................................11
1.1 Indoor Unit .............................................................11
1.2 Outdoor Unit ..........................................................11
2. External Appearance.....................................................12
2.1 Indoor Unit .............................................................12
2.2 Outdoor Unit ..........................................................13
3. Combination of Outdoor Units .....................................15
4. Nomenclature.................................................................17
4.1 Indoor Unit .............................................................17
4.2 Outdoor Unit ..........................................................17

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Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
1. Model Names
1.1 Indoor Unit
Model Names
SE
Wall Mounted
(General) S5
SE
Mirror
S3
SF
1 Way TJ
2 Way TL
TE
4 Way TP
TN
TM
BH
BG
High
Static BR
B8
B1
Low Static
B2
B3
B4
Ceiling & Floor VE
Ceiling Suspended VJ
CE
With Case
CF
CE
CF
Capacity(MBh (kW))
Category
Chassis
Name
7 9 12 15 18 24 28 36 42 48 76 96
(2.2) (2.8) (3.6) (4.5) (5.6) (7.1) (8.2) (10.6) (12.3) (14.1) (22.4) (28)
Ceiling
Concealed
Duct
Built In
ART Cool
Gallery
Floor
Standing
Without
Case
Ceiling
Cassette
ART COOL
❈* ART COOL- B: Blue, M:Metal, D:Wood, R:Mirror, W:White Wood, V:Silver, E:Red, G:Gold, 1: Kiss (Photo changeable)
*Wall Mounted- A: Basic, L:Plasma, *Ceiling Cassette- A: Basic, C:Plasma
ARNU073
SE*2
ARNU093
SE*2
ARNU123
SE*2
ARNU153
SE*2
ARNU073
TJ*2
ARNU093
TJ*2
ARNU123
TJ*2
ARNU183
TL*2
ARNU243
TL*2
ARNU073
TE*2
ARNU093
TE*2
ARNU123
TE*2
ARNU153
TE*2
ARNU183
TE*2
ARNU243
TP*2
ARNU283
TP*2
ARNU073
BHA2
ARNU093
BHA2
ARNU123
BHA2
ARNU153
BHA2
ARNU183
BHA2
ARNU243
BHA2
ARNU073
B1G2
ARNU093
B1G2
ARNU123
B1G2
ARNU153
B1G2
ARNU073
B3G2
ARNU093
B3G2
ARNU123
B3G2
ARNU153
B3G2
ARNU073
CEA2
ARNU093
CEA2
ARNU123
CEA2
ARNU153
CEA2
ARNU073
CEU2
ARNU093
CEU2
ARNU123
CEU2
ARNU153
CEU2
ARNU093
VEA2
ARNU123
VEA2
ARNU183
VJA2
ARNU243
VJA2
ARNU183
CFA2
ARNU243
CFA2
ARNU183
CFU2
ARNU243
CFU2
ARNU283
BGA2
ARNU363
BGA2
ARNU423
BGA2
ARNU363
TN*2
ARNU483
BRA2
ARNU423
TM*2
ARNU483
TM*2
URNU76
3B8A2
URNU96
3B8A2
ARNU183
B2G2
ARNU243
B2G2
ARNU183
B4G2
ARNU243
B4G2
ARNU073
SE*2
ARNU093
SE*2
ARNU123
SE*2
ARNU153
SE*2
ARNU073
SF*2
ARNU093
SF*2
ARNU123
SF*2
ARNU183
S5*2
ARNU243
S5*2
ARNU183
S3*2
ARNU243
S3*2

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Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
1.2 Outdoor Unit
Heat Pump ARUN
Power Supply 8HP 10HP 12HP 14HP 16HP 18HP 20HP 22HP 24HP
6.5ton 8.0ton 9.5ton 11.0ton 12.5ton 14.5ton 16.0ton 17.5ton 19.0ton
3Ø, 460V, 60Hz 076DT2 096DT2 115DT2 134DT2 154DT2 173DT2 192DT2 211DT2 230DT2
3Ø, 208/230V , 60Hz 076BT2 096BT2 115BT2 - 154BT2 173BT2 192BT2 211BT2 230BT2
Power Supply 26HP 28HP 30HP 32HP
20.5ton 22.5ton 24.0ton 25.5ton
3Ø, 460V, 60Hz 250DT2 270DT2 290DT2 310DT2

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Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
External Appearance
2. External Appearance
2.1 Indoor Units
Wall Mounted
ART COOL Mirror
Ceiling Cassette- 1Way
Ceiling Cassette- 4Way
Ceiling & Floor
Ceiling Suspended
ARNU073TJ*2
ARNU093TJ*2
ARNU123TJ*2
Ceiling Cassette -2Way
ARNU183TL*2
ARNU243TL*2
ARNU073TE*2
ARNU093TE*2
ARNU123TE*2
ARNU153TE*2
ARNU183TE*2
ARNU243TP*2
ARNU283TP*2
ARNU363TN*2
ARNU423TM*2
ARNU483TM*2
Ceiling Concealed Duct - Low Static
ARNU073B1G2
ARNU093B1G2
ARNU123B1G2
ARNU153B1G2
ARNU183B2G2
ARNU243B2G2
ARNU073SE*2
ARNU093SE*2
ARNU123SE*2
ARNU153SE*2
ARNU183S5*2
ARNU243S5*2
ARNU073SE*2
ARNU093SE*2
ARNU123SE*2
ARNU153SE*2
ARNU183S3*2
ARNU243S3*2
ARNU093VEA2
ARNU123VEA2
ARNU183VJA2
ARNU243VJA2
Floor Standing
With case
ARNU073CEA2
ARNU093CEA2
ARNU123CEA2
ARNU153CEA2
ARNU183CFA2
ARNU243CFA2
Without case
ARNU073CEU2
ARNU093CEU2
ARNU123CEU2
ARNU153CEU2
ARNU183CFU2
ARNU243CFU2
Ceiling Concealed Duct - High Static
ARNU073BHA2
ARNU093BHA2
ARNU123BHA2
ARNU153BHA2
ARNU183BHA2
ARNU243BHA2
ARNU283BGA2
ARNU363BGA2
ARNU423BGA2
ARNU483BRA2
URNU763B8A2
URNU963B8A2
Ceiling Concealed Duct – Built-in
ARNU073B3G2
ARNU093B3G2
ARNU123B3G2
ARNU153B3G2
ARNU183B4G2
ARNU243B4G2
* A:Basic, L:Plasma
ART COOL Gallery
ARNU073SF*2
ARNU093SF*2
ARNU123SF*2
* E:Red V:Silver
G:Gold 1: Kiss (Photo changeable)
* A:Basic, C:Plasma
* A:Basic, C:Plasma * A:Basic, C:Plasma
S3: * B : Blue
M : Metal
D : Wood
R : Mirror
W:White Wood
SE: * R:Mirror
V:Silver
B : Blue
These are model names of the basic function.

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Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
External Appearance
2.2 Outdoor Units(460V)
ARUN076DT2
ARUN096DT2
ARUN115DT2
ARUN134DT2
ARUN154DT2
ARUN173DT2
ARUN192DT2
ARUN211DT2
ARUN230DT2
ARUN250DT2
ARUN270DT2
ARUN290DT2
ARUN310DT2

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Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
External Appearance
2.2 Outdoor Units(208/230V)
ARUN076BT2
ARUN096BT2
ARUN115BT2
ARUN154BT2
ARUN173BT2
ARUN192BT2
ARUN211BT2
ARUN230BT2

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Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
Combination of Outdoor Units
3. Combination of Outdoor Units
3.1 460V
■A maximum of 32HP can be obtained by combining 8, 10, 12, 14 and 16HP
System Number of Units
Capacity 60Hz
Module
810121416
8HP(6.5ton) 1 1 - - - -
10HP(8.0ton) 1 - 1 - - -
12HP(9.5ton) 1 - - 1 - -
14HP(11.0ton) 1 - - - 1 -
16HP(12.5ton) 1 - - - - 1
18HP(14.5ton) 2 1 1 - - -
20HP(16.0ton) 2 1 - 1 - -
22HP(17.5ton) 2 1 - - 1 -
24HP(19.0ton) 2 1 - - - 1
26HP(20.5ton) 2 - - 1 1 -
28HP(22.5ton) 2 - - - 2 -
30HP(24.0ton) 2 - - - 1 1
32HP(25.5ton) 2 - - - - 2
System
Number of Units
Capacity 60Hz
Module
81012
8HP(6.5ton) 1 1 - -
10HP(8.0ton) 1 - 1 -
12HP(9.5ton) 1 - - 1
16HP(12.5ton) 2 2 - -
18HP(14.5ton) 2 1 1 -
20HP(16.0ton) 2 - 2 -
22HP(17.5ton) 2 - 1 1
24HP(19.0ton) 2 - - 2
3.2 208/230V

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Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
Nomenclature
4. Nomenclature
4.1 Indoor Unit
4.2 Outdoor Unit
ARN U 307 ATJ 2
Generation
Chassis Name
Electrical Ratings
1:1Ø, 115V, 60Hz 2: 1Ø, 220V, 60Hz
6:1Ø, 220 ~ 240V, 50Hz 7: 1Ø, 100V, 50/60Hz
3:1Ø, 220 ~ 240V, 50Hz, 208/230V 60Hz
Total Cooling Capacity in Btu/h
EX) 5,000 Btu/h➞'05' 18,000 Btu/h➞'18'
Combination of Inverter Type and
Cooling Only or Heat Pump
N: AC Inverter and H/P V: AC Inverter and C/O
U: DC Inverter and H/P and C/O
System with
Indoor Unit using R410A
❈LGETA:U Ex) URN
Combinations of functions
A:Basic function
L:Neo Plasma(Wall Mounted)
C:Plasma(Ceiling Cassette)
G: Low Static
ART COOL Type Panel Color
B:Blue D:Wood M:Metal R:Mirror W:White Wood
V: Silver E:Red G:Gold 1: Kiss (Photo changeable)
ARU N D096 T2
Generation
Air Discharge Type
S:Side Discharge
T:Top Discharge
Electrical Ratings
8: 3Ø, 380 ~ 415V, 50Hz 9: 3Ø, 380V, 60Hz
A: 3Ø, 220V, 50Hz B: 3Ø, 208/230V, 60Hz
L: 3Ø, 380 ~ 415V, 50Hz / 3Ø, 380V, 60Hz
D: 3Ø, 460V, 60Hz
Total Cooling Capacity in Btu/h
EX) 76,000 Btu/h ➞'076' 96,000 Btu/h ➞'096'
Combination of Inverter Type and
Cooling Only or Heat Pump
N: Inverter and H/P V: Inverter and C/O
B: Inverter and Heat Recovery
System with
Outdoor Unit using R410A

- 18 -
Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only

- 19 -
Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
Part 2
Outdoor Units

- 20 -
Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
• Function ........................................................................................21
• Replacement procedure for Compressor ..................................57
ARUN Series