P/NO : MFL46912301
www.lg.com
INSTALLATION MANUAL
AIR CONDITIONER
• Please read this installation manual completely before installing the product.
• Installation work must be performed in accordance with the national wiring
standards by authorized personnel only.
• Please retain this installation manual for future reference after reading it
thoroughly.
MODELS : ARUV Series
ARUN Series
ENGLISH
ITALIANO
ESPAÑOL FRANÇAIS
DEUTSCH
PORTUGUESE
2 Outdoor Unit
ARUV(N) Series Outdoor unit Installation Manual
TABLE OF CONTENTS
Safety Precautions .................................................................................................3
Installation Process................................................................................................7
Outdoor units Information.....................................................................................8
Environment-friendly Alternative Refrigerant R410A ......................................13
Select the Best Location......................................................................................13
Installation Space.................................................................................................14
Lifting method ......................................................................................................18
Installation ............................................................................................................19
Refrigerant piping installation ............................................................................24
Electrical Wiring ...................................................................................................52
Test Run ................................................................................................................71
Caution For Refrigerant Leak..............................................................................93
Installation guide at the seaside....................................................................................95
ENGLISH
Installation Manual 3
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.
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.
■ 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.
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 topple and result in injury.
Do not install the product on a defective
installation stand.
• It may cause injury, accident, or damage to the
product.
4 Outdoor Unit
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 exceeded. Should the
refrigerant leak and cause the safety limit to be exceeded, harzards due to lack of oxygen in the room could result.
■ Operation
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.
When installing and moving the air conditioner 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.
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 electrostatic filter, if
the unit is so equipped.)
• There is risk of physical injury, electric shock, or product failure.
■ Installation
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.
Use a vacuum pump or Inert (nitrogen) gas when doing leakage test or air purge.
Do not compress air or Oxygen and Do not use Flammable gases.
Otherwise, it may cause fire or explosion.
• There is the risk of death, injury, fire or explosion.
Installation Manual 5
ENGLISH
Safety Precautions
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.
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, communication station, or similar place, provide
sufficient protection against noise.
•
The inverter equipment, private power generator,
high-frequency medical equipment, or radio communication equipment may cause the air conditioner 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.
■ 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 generate heat and cause a fire.
Be sure the installation area does not deteriorate 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.
6 Outdoor Unit
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.
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 fingers.
• 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.
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.
Installation Process
Installation Process
The foundation must be level even
Outdoor unit foundation work
Avoid short circuits and ensure
sufficient space is allowed for service
Installation of outdoor unit
Refer to automatic addressing flowchart
Automatic addressing of indoor unit
In the final check for 24hours at 3.8 MPa(38.7 kgf/cm
2
) there must be no drop in pressure.
Airtight test
Multiple core cable must not be used.
(suitable cable should be selected)
Electrical work
(connection circuits and drive circuits)
Make sure no gaps are left where
the insulating materials are joined
Heat insulation work
Make sure airflow is sufficient
Duct work
Adjust to downward gradient
Drain pipe work
Special attention to dryness,
cleanness and tightness
Refrigerant piping work
Check model name to make
sure the fitting is made correctly
Installation of indoor unit
Take account of gradient
of drain piping
Sleeve and insert work
Make relationship between outdoor, indoor, remote controller, and option connections clear.
(Prepare control circuit diagram)
Preparation of contract drawings
Indicate clearly who is to be responsible for switch settings
Determination of division work
The vacuum pump used must have a capacity of reaching at least 5 torr, more than 1 hour
Vacuum drying
Recharge correctly as calculated in this manual. and record the amount of added refrigerant
Additional charge of refrigerant
Make sure there are no gaps left between the facing materials used on the ceiling
Fit facing panels
Run each indoor unit in turn to make sure the pipe work has been fitted correctly
Test run adjustment
Explain the use of the system as clearly as possible to your customer and make sure all relevant
documentation is in order
Transfer to customer with explanation
Preheat the crank case with the electrical heater for more than 6 hours.
• The above list indicates the order in which the individual work operations are normally carried out but this order may be
varied where local conditions warrants such change.
• The wall thickness of the piping should comply with the relevant local and national regulations for the designed pressure 3.8MPa.
• Since R410A is a mixed refrigerant, the required additional refrigerant must be charged in its liquid state.(If the refrigerant is charged in its gaseous state, its composition changes and the system will not work properly.)
ENGLISH
Installation Manual 7
8 Outdoor Unit
Outdoor units Information
Outdoor units Information
Power Supply: Outdoor Unit (3Ø, 380 ~ 415V, 50Hz)
■ Heat pump
Unit
System(HP)
Model Combination unit
Independent unit
Product Charge kg
CF(Correction Factor) kg
Max. Connectable No. of Indoor Units
Net Weight kg
Dimensions mm
(WxHxD) inch
Connecting Pipes Liquid Pipes[mm(inch)]
Gas Pipes[mm(inch)]
1 Outdoor Unit
56810
ARUN50LT2 ARUN60LT2 ARUN80LT2 ARUN100LT2
ARUN50LT2 ARUN60LT2 ARUN80LT2 ARUN100LT2
4.5 4.5 8 8
00-10
8(12) 10(12) 13(20) 16(25)
175 175 240 285
806x1607x730 806x1607x730 1280x1607x730 1280x1607x730
31.7x63.3x28.7 31.7x63.3x28.7 50.4x63.3x28.7 50.4x63.3x28.7
9.52 (3/8) 9.52 (3/8) 9.52 (3/8) 9.52 (3/8)
15.88 (5/8) 19.05 (3/4) 19.05 (3/4) 22.2 (7/8)
Unit
System(HP)
Model Combination unit
Independent unit
Product Charge kg
CF(Correction Factor) kg
Max. Connectable No. of Indoor Units
Net Weight kg
mm
Dimensions
(WxHxD)
inch
Connecting Pipes Liquid Pipes[mm(inch)]
Gas Pipes[mm(inch)]
1 Unit 2 Units
12 14 16 18
ARUN120LT2 ARUN140LT2 ARUN160LT2 ARUN180LT2
ARUN120LT2 ARUN140LT2 ARUN160LT2 ARUN120LT2
ARUN60LT2
8 8 8 4.5+8
1231
20(30) 23(35) 26(40) 29(36)
285 285 285 175+285
1280x1607x730 1280x1607x730 1280x1607x730 (1280x1607x730)
+(806X1607X730)
50.4x63.3x28.7 50.4x63.3x28.7 50.4x63.3x28.7 (50.4x63.3x28.7)
+(31.7x63.3x28.7)
12.7 (1/2) 12.7 (1/2) 12.7 (1/2) 15.88 (5/8)
28.58 (1 1/8) 28.58 (1 1/8) 28.58 (1 1/8) 28.58 (1 1/8)
• Ratio of the running Indoor Units to the Outdoor: Within 10 ~ 100%
• A combination operation over 100% cause to reduce each indoor unit capacity.
■ Combination Ration(50~200%)
Notes:
* We can guarantee the operation only within 130% Combination.
If you want to connect more than 130% combination, please contact us and discuss the requirement like below.
1) If the operation of indoor unit is more than 130%, low airflow operation is recommended in all
the indoor units.
2) If the operation of indoor unit is more than 130%, additional refrigerant is needed according to
the Äheadquarter guidance.
3)Over 130%, capacity is same as capacity of 130%, Same remark is valid for power input.
Outdoor Number Connection Capacity
Single outdoor units 200%
Double outdoor units 160%
Triple outdoor units 130%
ENGLISH
Installation Manual 9
Outdoor Units Information
Unit
System(HP)
Model Combination unit
Independent unit
Product Charge kg
CF(Correction Factor) kg
Max. Connectable No. of Indoor Units
Net Weight kg
mm
Dimensions
(WxHxD)
inch
Connecting Pipes Liquid Pipes[mm(inch)]
Gas Pipes[mm(inch)]
2 Units 3 Units
28 30 32 34
ARUN280LT2 ARUN300LT2 ARUN320LT2 ARUN340LT2
ARUN140LT2 ARUN160LT2 ARUN160LT2 ARUN140LT2
ARUN140LT2 ARUN140LT2 ARUN160LT2 ARUN140LT2
ARUN60LT2
8x2 8x2 8x2 4.5+8x2
4564
45(56) 49(60) 52(64) 55(64)
285x2 285x2 285x2 175+285x2
(1280x1607x730)x 2 (1280x1607x730)x 2 (1280x1607x730)x2 (1280x1607x730)x2
+(806X1607X730)
(50.4x63.3x28.7)x 2 (50.4x63.3x28.7)x 2 (50.4x63.3x28.7)x2 (50.4x63.3x28.7)x2
+(31.7x63.3x28.7)
19.05 (3/4) 19.05 (3/4) 19.05 (3/4) 19.05 (3/4)
34.9 (1 3/8) 34.9 (1 3/8) 34.9 (1 3/8) 34.9 (1 3/8)
Unit
System(HP)
Model Combination unit
Independent unit
Product Charge kg
CF(Correction Factor) kg
Max. Connectable No. of Indoor Units
Net Weight kg
mm
Dimensions
(WxHxD)
inch
Connecting Pipes Liquid Pipes[mm(inch)]
Gas Pipes[mm(inch)]
2 Units
20 22 24 26
ARUN200LT2 ARUN220LT2 ARUN240LT2 ARUN260LT2
ARUN140LT2 ARUN60LT2 ARUN160LT2 ARUN140LT2
ARUN60LT2 ARUN160LT2 ARUN80LT2 ARUN120LT2
4.5+8 4.5+8 8x2 8x2
2323
32(40) 35(44) 39(48) 42(52)
175+285 175+285 240+285 285x2
(1280x1607x730) (1280x1607x730) (1280x1607x730) (1280x1607x730)
+(806X1607X730) +(806X1607X730) x 2 x 2
(50.4x63.3x28.7) (50.4x63.3x28.7) (50.4x63.3x28.7) (50.4x63.3x28.7)
+(31.7x63.3x28.7) +(31.7x63.3x28.7) x 2 x 2
15.88 (5/8) 15.88 (5/8) 15.88 (5/8) 19.05 (3/4)
28.58 (1 1/8) 28.58 (1 1/8) 34.9 (1 3/8) 34.9 (1 3/8)
10 Outdoor Unit
Outdoor Units Information
Unit
System(HP)
Model Combination unit
Independent unit
Product Charge kg
CF(Correction Factor) kg
Max. Connectable No. of Indoor Units
Net Weight kg
mm
Dimensions
(WxHxD)
inch
Connecting Pipes Liquid Pipes[mm(inch)]
Gas Pipes[mm(inch)]
3 Units
36 38 40 42
ARUN360LT2 ARUN380LT2 ARUN400LT2 ARUN420LT2
ARUN160LT2 ARUN160LT2 ARUN160LT2 ARUN140LT2
ARUN140LT2 ARUN160LT2 ARUN160LT2 ARUN140LT2
ARUN60LT2 ARUN60LT2 ARUN80LT2 ARUN140LT2
4.5+8x2 4.5+8x2 8x3 8x3
5656
58(64) 61(64) 64(64) 64(64)
175+285x2 175+285x2 240+285x2 285x3
(1280x1607x730)x2 (1280x1607x730)x2 (1280x1607x730) (1280x1607x730)
+(806X1607X730) +(806X1607X730) x 3 x 3
(50.4x63.3x28.7)x2 (50.4x63.3x28.7)x2 (50.4x63.3x28.7) (50.4x63.3x28.7)
+(31.7x63.3x28.7) +(31.7x63.3x28.7) x 3 x 3
19.05 (3/4) 19.05 (3/4) 19.05 (3/4) 19.05 (3/4)
41.3 (1 5/8) 41.3 (1 5/8) 41.3 (1 5/8) 41.3 (1 5/8)
Unit
System(HP)
Model Combination unit
Independent unit
Product Charge kg
CF(Correction Factor) kg
Max. Connectable No. of Indoor Units
Net Weight kg
Dimensions mm
(WxHxD) inch
Connecting Pipes Liquid Pipes[mm(inch)]
Gas Pipes[mm(inch)]
3 Units
44 46 48
ARUN440LT2 ARUN460LT2 ARUN480LT2
ARUN160LT2 ARUN160LT2 ARUN160LT2
ARUN140LT2 ARUN160LT2 ARUN160LT2
ARUN140LT2 ARUN140LT2 ARUN160LT2
8x3 8x3 8x3
789
64(64) 64(64) 64(64)
285x3 285x3 285x3
(1280x1607x730)x3 (1280x1607x730)x3 (1280x1607x730)x3
(50.4x63.3x28.7)x3 (50.4x63.3x28.7)x3 (50.4x63.3x28.7)x3
19.05 (3/4) 19.05 (3/4) 19.05 (3/4)
41.3 (1 5/8) 41.3 (1 5/8) 41.3 (1 5/8)
ENGLISH
Installation Manual 11
Outdoor Units Information
■ Cooling Only
Unit
System(HP)
Model Combination unit
Independent unit
Product Charge kg
CF(Correction Factor) kg
Max. Connectable No. of Indoor Units
Net Weight kg
Dimensions mm
(WxHxD) inch
Connecting Pipes Liquid Pipes[mm(inch)]
Gas Pipes[mm(inch)]
1 Outdoor Unit
56810
ARUV50LT2 ARUV60LT2 ARUV80LT2 ARUV100LT2
ARUV50LT2 ARUV60LT2 ARUV80LT2 ARUV100LT2
4.5 4.5 4.5 8
0010
8(12) 10(12) 13(20) 16(25)
175 175 175 240
806x1607x730 806x1607x730 806x1607x730 1280x1607x730
31.7x63.3x28.7 31.7x63.3x28.7 31.7x63.3x28.7 50.4x63.3x28.7
9.52 (3/8) 9.52 (3/8) 9.52 (3/8) 9.52 (3/8)
15.88 (5/8) 19.05 (3/4) 19.05 (3/4) 22.2 (7/8)
Unit
System(HP)
Model Combination unit
Independent unit
Product Charge kg
CF(Correction Factor) kg
Max. Connectable No. of Indoor Units
Net Weight kg
mm
Dimensions
(WxHxD)
inch
Connecting Pipes Liquid Pipes[mm(inch)]
Gas Pipes[mm(inch)]
1 Unit 2 Units
12 14 16 18
ARUV120LT2 ARUV140LT2 ARUV160LT2 ARUV180LT2
ARUV120LT2 ARUV140LT2 ARUV160LT2 ARUV120LT2
ARUV60LT2
8 8 8 4.5+8
1231
20(30) 23(35) 26(40) 29(36)
285 285 285 175+285
1280x1607x730 1280x1607x730 1280x1607x730 (1280x1607x730)
+(806X1607X730)
50.4x63.3x28.7 50.4x63.3x28.7 50.4x63.3x28.7 (50.4x63.3x28.7)
+(31.7x63.3x28.7)
12.7 (1/2) 12.7 (1/2) 12.7 (1/2) 15.88 (5/8)
28.58 (1 1/8) 28.58 (1 1/8) 28.58 (1 1/8) 28.58 (1 1/8)
Unit
System(HP)
Model Combination unit
Independent unit
Product Charge kg
CF(Correction Factor) kg
Max. Connectable No. of Indoor Units
Net Weight kg
mm
Dimensions
(WxHxD)
inch
Connecting Pipes Liquid Pipes[mm(inch)]
Gas Pipes[mm(inch)]
2 Units
20 22 24 26
ARUV200LT2 ARUV220LT2 ARUY240LT2 ARUY260LT2
ARUV140LT2 ARUV160LT2 ARUV140LT2 ARUV160LT2
ARUV60LT2 ARUV60LT2 ARUV100LT2 ARUV100LT2
4.5+8 4.5+8 8x2 8x2
2323
32(40) 35(44) 39(48) 42(52)
175+285 175+285 240+285 240+285
(1280x1607x730) (1280x1607x730) (1280x1607x730) (1280x1607x730)
+(806X1607X730) +(806X1607X730) x 2 x 2
(50.4x63.3x28.7) (50.4x63.3x28.7) (50.4x63.3x28.7) (50.4x63.3x28.7)
+(31.7x63.3x28.7) +(31.7x63.3x28.7) x 2 x 2
15.88 (5/8) 15.88 (5/8) 15.88 (5/8) 19.05 (3/4)
28.58 (1 1/8) 28.58 (1 1/8) 34.9 (1 3/8) 34.9 (1 3/8)
12 Outdoor Unit
Outdoor Units Information
Unit
System(HP)
Model Combination unit
Independent unit
Product Charge kg
CF(Correction Factor) kg
Max. Connectable No. of Indoor Units
Net Weight kg
mm
Dimensions
(WxHxD)
inch
Connecting Pipes Liquid Pipes[mm(inch)]
Gas Pipes[mm(inch)]
2 Units 3 Units
28 30 32 34
ARUV280LT2 ARUV300LT2 ARUV320LT2 ARUV340LT2
ARUV140LT2 ARUV160LT2 ARUV160LT2 ARUV140LT2
ARUV140LT2 ARUV140LT2 ARUV160LT2 ARUV140LT2
ARUV60LT2
8x2 8x2 8x2 4.5+8x2
4564
45(56) 49(60) 52(64) 55(64)
285x2 285x2 285x2 175+285x2
(1280x1607x730) (1280x1607x730) (1280x1607x730) (1280x1607x730)x2
x2 x2 x2 +(806X1607X730)
(50.4x63.3x28.7) (50.4x63.3x28.7) (50.4x63.3x28.7) (50.4x63.3x28.7)x2
x2 x2 x2 +(31.7x63.3x28.7)
19.05 (3/4) 19.05 (3/4) 19.05 (3/4) 19.05 (3/4)
34.9 (1 3/8) 34.9 (1 3/8) 34.9 (1 3/8) 34.9 (1 3/8)
Unit
System(HP)
Model Combination unit
Independent unit
Product Charge kg
CF(Correction Factor) kg
Max. Connectable No. of Indoor Units
Net Weight kg
mm
Dimensions
(WxHxD)
inch
Connecting Pipes Liquid Pipes[mm(inch)]
Gas Pipes[mm(inch)]
3 Units
36 38 40 42
ARUV360LT2 ARUV380LT2 ARUV400LT2 ARUV420LT2
ARUV160LT2 ARUV160LT2 ARUV160LT2 ARUV160LT2
ARUV140LT2 ARUV160LT2 ARUV140LT2 ARUV160LT2
ARUV60LT2 ARUV60LT2 ARUV100LT2 ARUV100LT2
4.5+8x2 4.5+8x2 8x3 8x3
5656
58(64) 61(64) 64(64) 64(64)
175+285x2 175+285x2 240+285x2 240+285x2
(1280x1607x730)x2 (1280x1607x730)x2 (1280x1607x730) (1280x1607x730)
+(806x1607x730) +(806x1607x730) x 3 x 3
(50.4x63.3x28.7)x2 (50.4x63.3x28.7)x2 (50.4x63.3x28.7) (50.4x63.3x28.7)
+(31.7x63.3x28.7) +(31.7x63.3x28.7) x 3 x 3
19.05 (3/4) 19.05 (3/4) 19.05 (3/4) 19.05 (3/4)
41.3 (1 5/8) 41.3 (1 5/8) 41.3 (1 5/8) 41.3 (1 5/8)
Unit
System(HP)
Model Combination unit
Independent unit
Product Charge kg
CF(Correction Factor) kg
Max. Connectable No. of Indoor Units
Net Weight kg
Dimensions mm
(WxHxD) inch
Connecting Pipes Liquid Pipes[mm(inch)]
Gas Pipes[mm(inch)]
3 Units
44 46 48
ARUV440LT2 ARUV460LT2 ARUV480LT2
ARUV160LT2 ARUV160LT2 ARUV160LT2
ARUV140LT2 ARUV160LT2 ARUV160LT2
ARUV140LT2 ARUV140LT2 ARUV160LT2
8x3 8x3 8x3
789
64(64) 64(64) 64(64)
285x3 285x3 285x3
(1280x1607x730)x3 (1280x1607x730)x3 (1280x1607x730)x3
(50.4x63.3x28.7)x3 (50.4x63.3x28.7)x3 (50.4x63.3x28.7)x3
19.05 (3/4) 19.05 (3/4) 19.05 (3/4)
41.3 (1 5/8) 41.3 (1 5/8) 41.3 (1 5/8)
ENGLISH
Installation Manual 13
Environment-friendly Alternative Refrigerant R410A
Select the Best Location
Select space for installing outdoor unit, which will meet the following conditions:
• No direct thermal radiation from other heat sources
• No possibility of annoying neighbors by noise from unit
• No exposition to strong wind
• With strength which bears weight of unit
• Note that drain flows out of unit when heating
• With space for air passage and service work shown next
• Because of the possibility of fire, do not install unit to the space where generation, inflow, stagnation, and
leakage of combustible gas is expected.
• Avoid unit installation in a place where acidic solution and spray (sulfur) are often used.
• Do not use unit under any special environment where oil, steam and sulfuric gas exist.
• It is recommended to fence round the outdoor unit in order to prevent any person or animal from accessing the
outdoor unit.
• If installation site is area of heavy snowfall, then the following directions should be observed.
- Make the foundation as high as possible.
- Fit a snow protection hood.
• Select installation location considering following conditions to avoid bad condition when additionally performing
defrost operation.
1. Install the outdoor unit at a place well ventilated and having a lot of sunshine in case of installing the prod-
uct at a place with a high humidity in winter (neare beach, coast, lake, etc).
(Ex) Rooftop where sunshine always shines.
2. Performance of heating will be reduced and preheat time of the indoor unit may be lengthened in case of
installing the outdoor unit in winter at following location:
(1) Shade position with a narrow space
(2) Location with much moisture in neighboring floor.
(3) Location with much humidity around.
(4) Location where water gathers since the floor is not even.
• The refrigerant R410A has the property of higher operating pressure in comparison with R22.
Therefore, all materials have the characteristics of higher resisting pressure than R22 ones and this characteristic should be also considered during the installation.
R410A is an azeotrope of R32 and R125 mixed at 50:50, so the ozone depletion potential (ODP) of R410A is
0. These days the developed countries have approved it as the environment-friendly refrigerant and encouraged to use it widely to prevent environment pollution.
Environment-friendly Alternative Refrigerant R410A
CAUTION:
• The wall thickness of the piping should comply with the relevant local and national regulations for the designed
pressure 3.8MPa
• Since R410A is a mixed refrigerant, the required additional refrigerant must be charged in its liquid state.
If the refrigerant is charged in its gaseous state, its composition changes and the system will not work properly.
• Do not place the refrigerant container under the direct rays of the sun to prevent it from exploding.
• For high-pressure refrigerant, any unapproved pipe must not be used.
• Do not heat pipes more than necessary to prevent them from softening.
• Be careful not to install wrongly to minimize economic loss because it is expensive in comparison with R22.
14 Outdoor Unit
Installation Space
Installation Space
Individual Installation
■ Basic space required
A space of at least 250 mm is necessary at the back for inlet air. Taking servicing, etc. from the rear into
account, a space of about 700 mm should be provided, the same as at the front.
700 mm or more (Control box is open/close type)
250 mm or more
Top discharge (open in principle)
Front inlet (open in principle)
Rear inlet (open in principle)
A
B
C
D
E
B
A
Control Box
Front Side
Rear Side
B
A
Control Box
Front Side
Rear Side
B
A
Control Box
Front Side
Rear Side
B
A
Control Box
Front Side
Rear Side
A
B
C
700 mm or more
(Control box is open/close type)
250 mm or more
150 mm from the wall
C
A
B
C
A
B
h
H
Front Side
Rear Side
C
A
B
C
Front Side
Rear Side
C
A
B
C
Front Side
Rear Side
C
A
B
C
B
A
Control Box
Front Side
Rear Side
B
A
Control Box
Front Side
Rear Side
Front Side
Rear Side
< Side view > < Top view >
< Side view > < Top view >
C
ED
A
B
250 mm or more
(350 mm or more at the coastal area.)
150 mm from the wall
B
A
B
A
h
H
Front Side
Rear Side
B
A
B
Front Side
Rear Side
B
A
B
Front Side
Rear Side
B
A
B
Front Side
Rear Side
< Side view > < Top view >
CAUTION
Wall height(H) must not exceed height of
the product. If the wall height is higher
than the whole height of product by (h),
Add (h) to
, .
CAUTION
Wall height(H) must not exceed height of
the product. If the wall height is higher
than the whole height of product by (h),
Add (h) to
, .
■ When inlet air enters from right and left sides of unit
ENGLISH
Installation Manual 15
Installation Space
A
B
C
A
B
C
A
B
C
45° or more
200 mm or more
250 mm or more
A
B
C
A
B
C
< Front view >
< Front view >
C
< Air guide >
587.6
372.5
390
125
723.5
700 mm or more
250 mm or more
Air guide
Air outlet guide
(procured at the side)
A
B
D
E
E
D
A
Front Side
B
Rear
Side
Door
■ When unit is surrounded by walls
700 mm or more (Control box is of a open/close type)
250 mm or more
A
B
A
B
B
B
Front Side
Rear Side
A
B
B
B
Front Side
Rear Side
A
B
B
B
Front Side
Rear Side
A
B
B
B
Front Side
Rear Side
A
B
B
B
Front Side
Rear Side
Front Side
Rear Side
A
B
B
B
■ When there is an obstruction above the unit
16 Outdoor Unit
Installation Space
Collective / Continuous installation
Space required for collective installation and continuous installation:When installing several units, leave
space between each block as shown below considering passage for air and people.
(Be opened)
900mm or more (control box is of a open/close type)
250 mm or more
A
B
= 1250mm or more
at the coastal area
or strong wind area
B
C
150 mm or more
D
Front Side
Rear Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
❈
D D D
DDD
ENGLISH
Installation Manual 17
Installation Space
Seasonal wind and cautions in winter
• Sufficient measures are required in a snow area or severe cold area in winter so that product can be operated
well.
• Get ready for seasonal wind or snow in winter even in other areas.
• Install a suction and discharge duct not to let in snow or rain.
• Install the outdoor unit not to come in contact with snow directly. If snow piles up and freezes on the air suction
hole, the system may malfunction. If it is installed at snowy area, attach the hood to the system.
• Install the outdoor unit at the higher installation console by 50cm than the average snowfall (annual average
snowfall) if it is installed at the area with much snowfall.
• Where snow accumulated on the upper part of the Outdoor Unit by more than 10cm, always remove snow for
operation.
1. The height of H frame must be more than 2 times the snowfall and its width shall not exceed the width of the
product. (If width of the frame is wider than that of the product, snow may accumulate)
2. Don't install the suction hole and discharge hole of the Outdoor Unit facing the seasonal wind.
18 Outdoor Unit
Lifting Method
• When carrying the suspended, unit pass the ropes under the unit and use the two suspension points each at
the front and rear.
• Always lift the unit with ropes attached at four points so that impact is not applied to the unit.
• Attach the ropes to the unit at an angle of 40° or less.
Lifting method
CAUTION
Be very careful while carrying the product.
• Do not have only one person carry product if it is more than 20 kg.
• PP bands are used to pack some products. Do not use them as a mean for transportation because they
are dangerous.
• Do not touch heat exchanger fins with your bare hands. Otherwise you may get a cut in your hands.
• Tear plastic packaging bag and scrap it so that children cannot play with it. Otherwise plastic packaging
bag may suffocate children to death.
• When carrying in Outdoor Unit, be sure to support it at four points. Carrying in and lifting with 3-point
support may make Outdoor Unit unstable, resulting in a fall.
• Use 2 belts of at least 8 m long.
• Place extra cloth or boards in the locations where the casing comes in contact with the sling to prevent
damage.
• Hoist the unit making sure it is being lifted at its center of gravity.
A
40° or less
WARNING
ENGLISH
Installation Manual 19
Installation
Location of anchor bolt(To be applied to 1, 2 Units installation)
Installation
■ Individual installation
■ Collective installation
■ Installation foot(Location of anchor bolt)
10
383
10
383
700±2
900±2 900±2 900±2
UW1 UW1 UW1
383 383
700±2
900±2 900±2 900±2
UW1 UW1 UW1
10
383500±2
700±2
900±2900±210383
UY2 UW1 UW1
10
383500±2
700±2
900±2900±2
10 10
383 383
900±2 900±2 900±2
UW1 UW1 UW1
10 10
10 10 10
150
150
383
UY2 UW1 UW1
383533
533
500±2 900±2900±2
383
UY2 UW1 UW1
(UY2) (UW1)
20 Outdoor Unit
Installation
Foundation for Installation
• Fix the unit tightly with bolts as shown below so that unit will not fall down due to earthquake or gust.
• Use the H-beam support as a base support
• Noise and vibration may occur from the floor or wall since vibration is transferred through the installation
part depending on installation status. Thus, use anti-vibration materials (cushion pad) fully (The base pad
shall be more than 200mm).
Foundation bolt executing method
200
Nut
75
75
200
Spring washer
Frame
Anti-vibration
materials
Four bolt are
required
3 thread ridges
H-Beam
Concrete
base
100
WARNING
• Be sure to install unit in a place strong enough to withstand its weight.
Any lack of strength may cause unit to fall down, resulting in a personal injury.
• Have installation work in order to protect against a strong wind and earthquake. Any installation
deficiency may cause unit to fall down, resulting in a personal injury.
• Especially take care for support strength of the floor surface, water drain processing (processing of
water flown out from the outdoor unit during operation) and paths of the pipe and wiring when making a base support.
• Don't use a tube or pipe for water drain in the base pan and perform water drain processing by
using the drain path. Water drain may not be done due to freezing of a tube or pipe.
Side view
Water
Drain
Path
Rear view
ENGLISH
Installation Manual 21
Installation
Preparation of Piping
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 measured distance.
■ Cut the cable 1.5m longer than the pipe length.
2) Burrs removal
■ Completely remove all burrs from the cut cross section
of pipe/tube.
■ Put the end of the copper tube/pipe to downward direction as you remove burrs in order to avoid to let burrs
drop in the tubing.
3) Flaring work
■ Carry out flaring work using flaring tool as shown below.
Firmly hold copper tube in a bar(or die) as indicated
dimension in the table above.
4) Check
■ Compare the flared work with figure below.
■ If flare is noted to be defective, cut off the flared section
and do flaring work again.
Main cause of gas leakage is defect in flaring work. Carry out correct flaring work in the following procedure.
Pipe " A "
Gas Liquid Gas
Liquid
<5.6(19,100) 1/2" 1/4" 0.5~0.8 0~0.5
<16.0(54,600) 5/8" 3/8" 0.8~1.0 0.5~0.8
<22.4(76,400) 3/4" 3/8" 1.0~1.3 0.5~0.8
Indoor unit
[kW(Btu/h]
Copper
tube
90°
Slanted Uneven Rough
Pipe
Reamer
Point down
Bar
Copper pipe
Clamp handle
Red arrow mark
Cone
Yoke
Handle
Bar
"A"
Inclined
Inside is shining without scratches.
Smooth all round
Even length
all round
Surface
damaged
Cracked Uneven
thickness
= Improper flaring =
22 Outdoor Unit
Installation
1. Remove the cap and turn the valve counter clockwise with the hexagon wrench.
2. Turn it until the shaft stops.
Do not apply excessive force to the shutoff valve. Doing so may break the valve body, as the valve is not a
backseat type. Always use the special tool.
3. Make sure to tighten the cap securely.
1. Remove the cap and turn the valve clockwise with the hexagon wrench.
2. Securely tighten the valve until the shaft contacts the main body seal.
3. Make sure to tighten the cap securely.
* For the tightening torque, refer to the table on the below.
Precautions when connecting pipes
• See the following table for flare part machining dimensions.
• When connecting the flare nuts, apply refrigerant oil to the inside and outside of the flares and turn them three
or four times at first. (Use ester oil or ether oil.)
• See the following table for tightening torque.(Applying too much torque may cause the flares to crack.)
• After all the piping has been connected, use nitrogen to perform a gas leak check.
Tightening torque
Union
CAUTION
• Always use a charge hose for service port connection.
• After tightening the cap, check that no refrigerant leaks are
present.
• When loosening a flare nut, always use two wrenches in
combination, When connecting the piping, always use a spanner
and torque wrench in combination to tighten the flare nut.
• When connecting a flare nut, coat the flare(inner and outer faces)
with oil for R410A(PVE) and hand tighten the nut 3 to 4 turns as
the initial tightening.
Opening shutoff valve
Closing shutoff valve
FLARE SHAPE and FLARE NUT TIGHTENING TORQUE
Shutoff
valve size
Ø6.4
Ø9.5
Ø12.7
Ø15.9
Ø22.2
Ø25.4
13.5-16.5
18-22
14-17
33-39
50-60
62-75
23-27
13.5-16.5
5.4-6.6
Hexagonal
wrench 4mm
Hexagonal
wrench 6mm
Hexagonal
wrench 10mm
8.1-9.9
27-33 36-44
-
11.5-13.9
22-28-
Tightening torque N-m(Turn clockwise to close)
Shaft(valve body)
Gas line piping attached to unit
Cap(Valve lid) Service port Flare nut
90°
±2
45°
±2
A
R=0.4~0.8
pipe size tightening torque(Ncm) A(mm) flare shape
Ø9.5 3270-3990 12.8-13.2
Ø12.7 4950-6030 16.2-16.6
Ø15.9 6180-7540 19.3-19.7
ENGLISH
Installation Manual 23
Installation
1. Use the heat insulation material for the refrigerant piping which has an excellent heat-resistance (over
120°C).
2. Precautions in high humidity circumstance:
This air conditioner has been tested according to the
"ISO Conditions with Mist" and confirmed that there is
not any default. However, if it is operated for a long
time in high humid atmosphere (dew point temperature: more than 23°C), water drops are liable to fall. In
this case, add heat insulation material according to
the following procedure:
• Heat insulation material to be prepared... EPDM
(Ethylene Propylene Diene Methylene)-over 120°C
the heat-resistance temperature.
• Add the insulation over 10mm thickness at high humidity environment.
Indoor unit
Thermal insulator
(accessory)
Fastening band
(accessory)
Refrigerant piping
HEAT INSULATION
24 Outdoor Unit
Refrigerant piping installation
WARNING
After completing work, securely tighten both service ports and caps so that gas does not leak.
Refrigerant piping installation
WARNING
Always use extreme care to prevent the refrigerant gas (R410A) from leakage while using fire or
flame. If the refrigerant gas comes in contact with the flame from any source, such as a gas stove, it
breaks down and generates a poisonous gas which can cause gas poisoning. Never perform brazing
in an unventilated room. Always conduct an inspection for gas leakage after installation of the refrigerant piping has been completed.
Pipe joint (auxiliary parts): Securely perform brazing with
a nitrogen blow into the service valve port.(Releasing
pressure : 0.02 MPa or less)
Flare nut: Loose or tighten flare nut by using the wrench
with both ends. Coat the flare connection part with oil for
the compressor.
Cap: Remove caps and operate valve, etc. After operation, always reattach caps (tightening torque of valve
cap: 25Nm (250kg-cm) or more). (Don't remove the
internal part of the port)
Service port: Make the refrigerant pipe vacuum and
charge it using the service port. Always reattach caps
after completing work (tightening torque of service cap:
14Nm (140kg-cm) or more).
Liquid pipe
Gas pipe
Elbow joint (field supply)
Cautions in pipe connection/valve operation
Open status when both the pipe and
the valve are in a straight line.
Cut both the pipe and the valve with a
cutter to suit the length
(Don't cut the length of less than 70mm)
CLOSE OPEN
Elbow
Ball Valve(Gas Pipe)
Ball Valve(Liquid Pipe)
ENGLISH
Installation Manual 25
Refrigerant piping installation
Connection of High/Low Pressure Common pipe
1. For the High/Low Pressure Common pipe, connect both Master Outdoor Unit and Slave (1, 2) Outdoor Unit to the pipe
(field supply) by using elbows (field supply)
2. For cutting the pipe, connect the High/Low Pressure Common pipe after removing burrs, dusts and foreign materials
within the pipe. Otherwise, the product may not operate due to sludge within the pipe.
When connecting the pipes from the front of
the outdoor unit, remove part
.
When connecting the pipes from the side of the
outdoor unit, remove part (the whole "Knock
out" part).
Slave
Outdoor Unit
Master
Outdoor Unit
2 outdoor units 3 outdoor units
WARNING
After installing the pipe, clog the pipe excavation inlet of the front panel and the side panel
(Wire may be damaged due to entry of rats, animals, etc).
CAUTION
When you use the Hi/Low pressure common pipe to
connect 2~3 ODU, please remove the factory supplied
rubber cap as shown in the figure.
When installing just one ODU, please make
sure to remove the factory supplied rubber
cap and replace it by brazing the copper
cap supplied with manual in ODU.
If you do not replace the factory supplied
rubber cap, there might be refrigerant leakage.
Gas valve
Slave2
Outdoor
Unit
Slave1
Outdoor
Unit
Master
Outdoor Unit
(Front)
(Side)
Knock out
Communication Line Hole
Power Cable Hole
Pipe Hole
Outdoor unit
joint pipe (used
for more than 2
units installation)
Service
port cap
Cap
Liquid
valve
Cut the pipe with a
cutter to suit the length.
(Don't cut less than 70mm)
Gas valve
Gas valve
70mm
26 Outdoor Unit
Refrigerant piping installation
2 outdoor units
Connection of Outdoor units
3 Outdoor Units
Model
Connection of gas pipe Connection of liquid pipe
Blow nitrogen
Don't cut the pipe less
than 70mm
Ø 19.05
ARCNN20
Ø 22.2
Ø15.88
OD19.05
Model
Connection of gas pipe
Don't cut the pipe less
than 70mm
Ø 19.05
Ø15.88
OD19.05
ARCNN20
Connection of liquid pipe
Ø 9.52
Ø 12.7
Ø 28.58
Ø 22.2
Ø9.52
OD12.7
Ø 28.58
Ø19.05
OD28.58
Ø22.2
Ø 28.58
Ø 28.58
Ø19.05
Ø22.2
Sub1 outdoor unit
Ø 12.7
while brazing
Main outdoor
gas pipe
OD28.58
OD34.9
Blow nitrogen
while brazing
Sub1 outdoor
gas pipe
Ø 19.05
Ø 15.88
OD19.05
Ø22.2
Ø 31.8
Ø 28.58
Main pipe
Ø38.1
OD34.9
Ø38.1
Ø 12.7
Ø 34.9
Ø 31.8
Ø 28.58
Ø 34.9
Model
ARCNN30
Main outdoor
liquid pipe
Ø 12.7
Ø 9.52
Ø 12.7
OD12.7
Ø9.52
Ø22.2
OD19.05
Connection of gas pipe
Don't cut the pipe less
than 70mm
Ø 34.9
Ø 28.58
Ø19.05
Connection of liquid pipe
Main outdoor unit
Ø 12.7
Ø 12.7
Ø 19.05
Ø 15.88
Ø 19.05 Ø 12.7
Ø 15.88
Main pipe
Ø 28.58
OD28.58
Ø22.2
Ø9.52
OD12.7
Blow nitrogen
while brazing
Main outdoor
gas pipe
Main pipe
Ø 22.2 Ø 19.05
Main pipe
Ø 38.1
Ø 34.9
Ø 41.3
Y branch
A
To outdoor unit
A
To branch piping or indoor unit
B
B
Viewed from point A
in direction of arrow
Within +/- 10°
Facing
downwards
Facing
upwards
Within ± 3° Within ± 3°
ENGLISH
Installation Manual 27
Refrigerant piping installation
To Outdoor Unit
Sealed Piping
A
A
B
A
B
1. Use the following materials for refrigerant piping.
• Material: Seamless phosphorous deoxidized copper pipe
• Wall thickness : Comply with the relevant local and national regulations for the designed pressure
3.8MPa. We recommend the following table as the minimum wall thickness.
2. Commercially available piping often contains dust and other materials. Always blow it clean with a dry inert
gas.
3. Use care to prevent dust, water or other contaminants from entering the piping during installation.
4. Reduce the number of bending portions as much as possible, and make bending radius as big as possible.
5. Always use the branch piping set shown below, which are sold separately.
6. If the diameters of the branch piping of the designated refrigerant piping differs, use a pipe cutter to cut
the connecting section and then use an adapter for connecting different diameters to connect the piping.
7. Always observe the restrictions on the refrigerant piping (such as rated length, difference in height, and
piping diameter).
Failure to do so can result in equipment failure or a decline in heating/cooling performance.
8. A second branch cannot be made after a header. (These are shown by .)
9. The Multi V will stop due to an abnormality like excessive or insufficient refrigerant. At such a time, always
properly charge the unit. When servicing, always check the notes concerning both the piping length and
the amount of additional refrigerant.
10. Never perform a pump down. This will not only damage the compressor but also deteriorate the
performance.
11. Never use refrigerant to perform an air purge. Always evacuate using a vacuum pump.
Caution
ARBLN01621 ARBLN03321 ARBL054 ARBL057 ARBL1010
ARBLN07121 ARBLN14521 ARBL104 ARBL107 ARBL2010
Y branch
Header
4 branch 7 branch 10 branch
0.99
22.2
1.1
31.8
1.21
34.9
1.35
38.1
1.43
41.3
0.99
28.58
0.99
25.4
0.99
19.05
0.99
15.88
0.8
12.7
0.8
9.52
0.8
6.35
Minimum
thickness [mm]
Outer diameter
[mm]
28 Outdoor Unit
Refrigerant piping installation
WARNING
When installing and moving the air conditioner to another site, be sure to make recharge refrigerant
after perfect evacuation.
- If a different refrigerant or air is mixed with the original refrigerant, the refrigerant cycle may malfunction and
the unit may be damaged.
- After selecting diameter of the refrigerant pipe to suit total capacity of the indoor unit connected after
branching, use an appropriate branch pipe set according to the pipe diameter of the indoor unit and the
installation pipe drawing.
= Product length + ∑ Max.10 (distance between Outdoor Units)
Pipe length between Outdoor Units
(Gas pipe, Liquid pipe, High/Low Pressure Common pipe)
12. Always insulate the piping properly. Insufficient insulation will result in a decline in heating/cooling performance, drip of condensate and other such problems.
13. When connecting the refrigerant piping, make sure the service valves of the Outdoor Unit is completely
closed (the factory setting) and do not operate it until the refrigerant piping for the Outdoor and Indoor
Units has been connected, a refrigerant leakage test has been performed and the evacuation process
has been completed.
14. Always use a non-oxidizing brazing material for brazing the parts and do not use flux. If not, oxidized film
can cause clogging or damage to the compressor unit and flux can harm the copper piping or refrigerant
oil.
Unit: mm
Product length
Distance between Outdoor Units
Product length
Distance between Outdoor Units
Max. 10
Max. 10
ENGLISH
Installation Manual 29
Refrigerant piping installation
◆ Y branch method
Refrigerant piping system
1 Outdoor Units
Example : 5 Indoor Units connected
: Outdoor Unit
: 1st branch (Y branch)
: Indoor Units
l
40m (90 m : Conditional application)
H 100m
L150m (200 m : Conditional application)
Master
Master
Slave
Slave
10m or
less
l 40m (90 m : Conditional application)
H 100m
L150m (200 m : Conditional application)
Piping length from outdoor branch to outdoor unit ≤10m, equivalent length:max 13m
(for 18HP or more)
Additional Application
To satisfy below condition to make 40 m ~ 90 m of pipe length after first branch.
1) Diameter of pipes between first branch and the last branch should be increased by one step,
except pipe diameter B,C,D is same as Diameter A
Ø6.35 → Ø 9.52 → Ø 12.7 → Ø 15.88 → Ø 19.05 → Ø 22.2 → Ø 25.4*, Ø 28.58 → Ø 31.8*, Ø 34.9 → Ø
38.1*
* : It is not necessary to size up.
2) While calculating whole refrigerant pipe length, pipe B,C,D length should be calculated twice.
A+Bx2+Cx2+Dx2+a+b+c+d+e ≤ 1,000 m
3) Length of pipe from each indoor unit to the closest branch (a,b,c,d,e) ≤ 40 m
4) [Length of pipe from outdoor unit to the farthest indoor unit 5 (A+B+C+D+e)]
- [Length of pipe outdoor unit to the closest indoor unit 1 (A+a)] ≤ 40 m
2 Outdoor Units
Example : 5 Indoor Units connected
: Outdoor Unit
: 1st branch (Y branch)
: Indoor Units
: Downward Indoor Unit
: Connection branch pipe
between Outdoor units:
ARCNN20
30 Outdoor Unit
Refrigerant piping installation
10m or
less
L150m (200 m : Conditional application)
l
40m (90 m : Conditional application)
H 100m
Slave2
Slave1
Master
3 Outdoor Units
Example : 5 Indoor Units
connected
: Outdoor Unit
: 1st branch (Y branch)
: Indoor Units
: Downward Indoor Unit
: Connection branch pipe
between Outdoor units:
ARCNN30
: Connection branch pipe
between Outdoor units:
ARCNN20
10m or
less
L150m (200 m : Conditional application)
l
40m (90 m : Conditional application)
H 100m
Slave2
Slave1
Master
3 Outdoor Units
Example : 5 Indoor Units
connected
: Outdoor Unit
: 1st branch (Y branch)
: Indoor Units
: Downward Indoor Unit
: Connection branch pipe
between Outdoor units:
ARCNN30
: Connection branch pipe
between Outdoor units:
ARCNN20
Piping length form outdoor branch to outdoor unit ≤ 10 m, equivalent length : max. 13 m(for 18 HP or
more)
Additional Application
To satisfy below condition to make 40 m ~ 90 m of pipe length after first branch.
1) Diameter of pipes between first branch and the last branch should be increased by one step,
except pipe diameter B,C,D is same as Diameter A
Ø6.35 → Ø 9.52 → Ø 12.7 → Ø 15.88 → Ø 19.05 → Ø 22.2 → Ø 25.4*, Ø 28.58 → Ø 31.8*, Ø 34.9 → Ø
38.1*
* : It is not necessary to size up.
2) While calculating whole refrigerant pipe length, pipe B,C,D length should be calculated twice.
A+Bx2+Cx2+Dx2+a+b+c+d+e ≤ 1,000 m
3) Length of pipe from each indoor unit to the closest branch (a,b,c,d,e) ≤ 40 m
4) [Length of pipe from outdoor unit to the farthest indoor unit 5 (A+B+C+D+e)]
- [Length of pipe outdoor unit to the closest indoor unit 1 (A+a)] ≤ 40 m
ENGLISH
Installation Manual 31
Refrigerant piping installation
➲ Refrigerant pipe diameter from branch to branch (B,C,D)
➲ Total pipe length = A+B+C+D+a+b+c+d+e ≤ 1,000 m
• * : Assume equivalent piping length of Y branch to be 0.5m, that of header to be 1m, calculation purpose.
• ** : To apply Conditional Application
Downward Indoor Unit total capacity
[kW(Btu/h)]
≤5.6(19,100) Ø6.35(1/4) Ø12.7(1/2)
<16(54,600) Ø9.52(3/8) Ø15.88(5/8)
<22.4(76,400) Ø9.52(3/8) Ø19.05(3/4)
< 33(112,600) Ø9.52(3/8) Ø22.2(7/8)
< 47(160,400) Ø12.7(1/2) Ø28.58(11/8 )
< 71(242,300) Ø15.88(5/8) Ø28.58(11/8 )
< 104(354,900) Ø19.05(3/4) Ø34.9(13/8)
104(354,900) ≤ Ø19.05(3/4) Ø41.3(15/8)
Liquid pipe
[mm(inch)]
Gas pipe
[mm(inch)]
Longest pipe length Equivalent pipe length
A+B+C+D+e ≤ 150m(200 m**)*A+B+C+D+e ≤ 175m(225 m**)
Longest pipe length after 1st branch
B+C+D+e ≤ 40m(90 m**)
Difference in height(Outdoor Unit ↔ Indoor Unit)
H ≤ 100m
Difference in height (Indoor Unit ↔ Indoor Unit)
h ≤15m
Difference in height (Outdoor Unit ↔ Outdoor Unit)
h1 ≤ 5m
L
l
H
h
h1
Upward Outdoor Unit
total capacity [HP]
5 Ø9.52(3/8) Ø15.88(5/8)
6, 8 Ø9.52(3/8) Ø19.05(3/4)
10 Ø9.52(3/8) Ø22.2(7/8)
12~16 Ø12.7(1/2) Ø28.58(11/8)
18~22 Ø15.88(5/8) Ø28.58(11/8)
24 Ø15.88(5/8) Ø34.9(13/8)
26~34 Ø19.05(3/4) Ø34.9(13/8)
36~48 Ø19.05(3/4) Ø41.3(15/8)
Liquid pipe
[mm(inch)]
Gas pipe
[mm(inch)]
Upward Outdoor Unit
total capacity [HP]
18, 20, 22 Ø15.88(5/8) Ø28.58(11/8)
24 Ø19.05(3/4) Ø34.9(13/8)
26, 28, 30, 32 Ø19.05(3/4) Ø34.9(13/8)
Liquid pipe
[mm(inch)]
Gas pipe
[mm(inch)]
Upward Outdoor Unit
total capacity [HP]
6, 8 Ø9.52(3/8) Ø19.05(3/4)
10 Ø9.52(3/8) Ø22.2(7/8)
12, 14, 16 Ø12.7(1/2) Ø28.58(11/8)
Liquid pipe
[mm(inch)]
Gas pipe
[mm(inch)]
AE
F
32 Outdoor Unit
Refrigerant piping installation
1 Outdoor Unit
Example : 6 Indoor Units connected
: Outdoor Unit
: 1st branch
: Indoor Units
: Sealed piping
L 150m
40m
H 100m
2 Outdoor Units
Example : 6 Indoor Units connected
: Outdoor Unit
: Header branch
: Indoor Units
: Sealing
: Connection branch pipe
between Outdoor units:
ARCNN20
◆ Header Method
10m or
less
L 100m
Slave
Master
Slave
Master
L 150m
40m
ENGLISH
Installation Manual 33
Refrigerant piping installation
Longest pipe length * Equivalent pipe length
A+f ≤ 150m A+f ≤ 175m
Longest pipe length after 1st branch
f ≤ 40m
Difference in height(Outdoor Unit ↔ Indoor Unit)
H ≤ 100m
Difference in height (Indoor Unit ↔ Indoor Unit)
h ≤15m
Difference in height
(Outdoor Unit ↔ Outdoor Unit)
h1 ≤ 5m
L
l
H
h
h1
➲ Total pipe length = A+a+b+c+d+e+f ≤ 1,000m
WARNING
Pipe length after header branching
(a~f)
It is recommended that difference
in length of the pipes connected to
the Indoor Units is minimized.
Performance difference between
Indoor Units may occur.
• * :
Assume equivalent piping length of Y branch to be 0.5m, that of header to be 1m, calculation purpose
• Indoor Unit should be installed at lower position than the header.
• Piping length from outdoor branch to outdoor unit ≤ 10m, equivalent length : max 13m
(for 18HP or more)
Branch pipe can not be used after header
Branch pipe can not be used after header
3 Outdoor Units
Example : 6 Indoor Units connected
: Outdoor Unit
: Header branch
: Indoor Units
: Sealing
: Connection branch pipe
between Outdoor units:
ARCNN30
: Connection branch pipe
between Outdoor units:
ARCNN20
3 Outdoor Units
Example : 6 Indoor Units connected
: Outdoor Unit
: Header branch
: Indoor Units
: Sealing
: Connection branch pipe
between Outdoor units:
ARCNN30
: Connection branch pipe
between Outdoor units:
ARCNN20
Slave2
Slave1
Master
10m or
less
L 150m
40m
H 100m
Slave2
Slave1
Master
10m or
less
L 150m
40m
H 100m
34 Outdoor Unit
Refrigerant piping installation
◆ Combination of Y branch/header method
Example : 5 Indoor Units connected
: Outdoor Unit
: 1st branch (Y branch)
: Y branch
: Indoor Unit
: Header
: Sealed piping
L 150m
40m
L 100m
Branch pipe can not be used after header
Branch pipe can not be used after header
Example : 5 Indoor Units connected
: Outdoor Unit
: 1st branch
: Y branch
: Indoor Unit
: Connection branch pipe
between Outdoor units:
ARCNN30
: Connection branch pipe
between Outdoor units:
ARCNN20
: Header
: Sealed piping
10m or
less
H 100m
L 150m
40m
Master
Master
Slave
Slave
ENGLISH
Installation Manual 35
Refrigerant piping installation
Branch pipe can not be used after header
3 Outdoor Units
Example : 5 Indoor Units connected
: Outdoor Unit
: 1st branch(Y branch)
: Y branch
: Indoor Unit
: Connection branch pipe
between Outdoor units:
ARCNN30
: Connection branch pipe
between Outdoor units:
ARCNN20
: Header
: Sealing
10m or
less
H 100m
L 150m
40m
Master
Slave2
Slave1
Branch pipe can not be used after header
3 Outdoor Units
Example : 5 Indoor Units connected
: Outdoor Unit
: 1st branch(Y branch)
: Y branch
: Indoor Unit
: Connection branch pipe
between Outdoor units:
ARCNN30
: Connection branch pipe
between Outdoor units:
ARCNN20
: Header
: Sealing
10m or
less
H 100m
L 150m
40m
Master
Slave2
Slave1
36 Outdoor Unit
Refrigerant piping installation
➲ Refrigerant pipe diameter from branch to branch (B,C)
➲ Total pipe length = A+B+C+a+b+c+d+e ≤ 1,000m
Longest pipe length * Equivalent pipe length
A+B+b ≤ 150m A+B+b ≤ 175m
Longest pipe length after 1st branch
B+b ≤ 40m
Difference in height(Outdoor Unit ↔ Indoor Unit)
H ≤ 100m
Difference in height (Indoor Unit ↔ Indoor Unit)
h ≤ 15m
Difference in height (Outdoor Unit ↔ Outdoor Unit)
h1 ≤ 5m
L
l
H
h
h1
WARNING
It is recommended that difference of piping length for pipes connected to the Indoor Unit is
minimized. Performance difference between Indoor Units may occur.
Downward Indoor Unit total capacity
[kW(Btu/h)]
≤5.6(19,100) Ø6.35(1/4) Ø12.7(1/2)
<16(54,600) Ø9.52(3/8) Ø15.88(5/8)
<22.4(76,400) Ø9.52(3/8) Ø19.05(3/4)
< 33(112,600) Ø9.52(3/8) Ø22.2(7/8)
< 47(160,400) Ø12.7(1/2) Ø28.58(11/8 )
< 71(242,300) Ø15.88(5/8) Ø28.58(11/8 )
< 104(354,900) Ø19.05(3/4) Ø34.9(13/8)
104(354,900) ≤ Ø19.05(3/4) Ø41.3(15/8)
Liquid pipe
[mm(inch)]
Gas pipe
[mm(inch)]
• * :
Assume equivalent pipe length of Y branch to be 0.5m, that of header to be 1m, calculation purpose
• Indoor Unit should be installed at lower position than the header.
Upward Outdoor Unit
total capacity [HP]
5 Ø0.52(3/8) Ø15.88(5/8)
6, 8 Ø9.52(3/8) Ø19.05(3/4)
10 Ø9.52(3/8) Ø22.2(7/8)
12~16 Ø12.7(1/2) Ø28.58(11/8)
18~22 Ø15.88(5/8) Ø28.58(11/8)
24 Ø15.88(5/8) Ø34.9(13/8)
26~34 Ø19.05(3/4) Ø34.9(13/8)
36~48 Ø19.05(3/4) Ø41.3(15/8)
Liquid pipe
[mm(inch)]
Gas pipe
[mm(inch)]
Upward Outdoor Unit
total capacity [HP]
18, 20, 22 Ø15.88(5/8) Ø28.58(11/8)
24 Ø19.05(3/4) Ø34.9(13/8)
26, 28, 30, 32 Ø19.05(3/4) Ø34.9(13/8)
Liquid pipe
[mm(inch)]
Gas pipe
[mm(inch)]
Upward Outdoor Unit
total capacity [HP]
6, 8 Ø9.52(3/8) Ø19.05(3/4)
10 Ø9.52(3/8) Ø22.2(7/8)
12, 14, 16 Ø12.7(1/2) Ø28.58(1
1
/8)
Liquid pipe
[mm(inch)]
Gas pipe
[mm(inch)]
AE
F
ENGLISH
Installation Manual 37
Refrigerant piping installation
◆ Outdoor unit Connection
WARNING
• In case of pipe diameter B connected after first branch is bigger than the main pipe diameter A, B should be of
the same size with A.
Ex) In case indoor unit combination ratio 120% is connected to 70kW outdoor unit.
1) Outdoor unit main pipe diameter A : Ø34.9(gas pipe), Ø15.88(liquid pipe)
2) Pipe diameter B after first branch according to 120% indoor unit combination(84kW) :Ø34.9(gas pipe),
Ø19.05(liquid pipe)
Therefore, pipe diameter B connected after first branch would be Ø34.9(gas pipe)/Ø15.88(liquid pipe)
which is same with main pipe diameter.
[Example]
Do not choose the main pipe diameter by downward indoor unit total capacity but its outdoor unit model name.
Do not let the connection pipe from branch to branch exceed the main pipe diameter chosen by outdoor unit
model name.
EX) Where connecting the indoor units to the 22 HP (61.5 kW) outdoor unit to 120% of its system capacity (73.8
kW) and branching 7k (2.1kW) indoor unit at the 1st branch
Main pipe diameter(22 HP outdoor unit): Ø28.58(Gas pipe) Ø15.88(Liquid pipe)
Pipe diameter between 1st and 2nd branch (71.7kW indoor units):
Ø34.9(Gas pipe) Ø19.05(Liquid pipe) in conformity with downward indoor units.
Since the main pipe diameter of 22HP outdoor unit is Ø28.58(Gas pipe) and Ø15.88(Liquid pipe), Ø28.58 (Gas
pipe) and Ø15.88 (Liquid pipe) is used as the main pipe and the connection pipe between 1st and 2nd branch.
WARNING
When the equivalent length between the outdoor unit and a indoor unit is 90 m or more, the size of main
pipes (Liquid pipe and Gas pipe) must be increased one grade.
◆ Indoor Unit Connection
➲ Indoor Unit connecting pipe from branch (a,b,c,d,e,f)
Indoor Unit capacity [kW(Btu/h)]
≤ 5.6(19,100)
< 16.0(54,600)
< 22.4(76,400)
Ø6.35(1/4)
Ø9.52(3/8)
Ø9.52(3/8)
Ø12.7(1/2)
Ø15.88(5/8)
Ø19.05(3/4)
Liquid pipe
[mm(inch)]
Gas pipe
[mm(inch)]
Gas pipe
5HP................................................Ø15.88 → Ø19.05
6, 8HP............................................Ø19.05 → Ø22.2
10HP..............................................Ø22.2 → Ø25.4
12, 14HP........................................Ø28.58 → Not increased
16, 18, 20, 22HP ...........................Ø28.58 → Ø31.8
24HP..............................................Ø34.9 → Not increased
26, 28, 30, 32, 34HP......................Ø34.9 → Ø38.1
36, 38, 40, 42, 44, 46, 48HP..........Ø41.3 → Not increased
Liquid pipe
5, 6HP............................................Ø9.52 → Not increased
8, 10HP..........................................Ø9.52 → Ø12.7
12, 14, 16HP..................................Ø12.7 → Ø15.88
18, 20, 22, 24HP............................Ø15.88 → Ø19.05
26, 28, 30, 32, 34, 36, 38, 40
42, 44, 46, 48HP............................Ø19.05 → Ø22.2
➲ Refrigerant pipe diameter before 1st branch (A)
Upward Outdoor Unit total capacity
[HP]
5 Ø9.52(3/8) Ø15.88(5/8)
6, 8 Ø9.52(3/8) Ø19.05(3/4)
10 Ø9.52(3/8) Ø22.2(7/8)
12~16 Ø12.7(1/2) Ø28.58(11/8 )
18~22 Ø15.88(5/8) Ø28.58(11/8 )
24 Ø15.88(5/8) Ø34.9(13/8)
26~34 Ø19.05(3/4) Ø34.9(13/8)
36~48 Ø19.05(3/4) Ø41.3(15/8)
Liquid pipe
[mm(inch)]
Gas pipe
[mm(inch)]
* High/Low Pressure Common Pipe: Ø19.05(18HP or more)
38 Outdoor Unit
Refrigerant piping installation
Connection between outdoor and outdoor unit
■ Example of Pipe Connection between Outdoor
1. Pipe Connection between Outdoors
2. In case pipe length between outdoors is less than 2m
Differnce in height between outdoor units
Less than 5m( h1
5m).
Longest Pipe Length between Outdoors
Less than 10m, after 1st branch.
h1
Less than 10 m
Less than 2 m
ENGLISH
Installation Manual 39
Refrigerant piping installation
3. In case pipe length between outdoors is 2m or more.
When the piping length between Branch of Outdoor units or between Branch and outdoor units
Is 2 m or more, prepare a oil trap (200 mm or more as shown below) on the gas pipe line location
Less than 2 m from branch.
4. Example of wrong connection
Oil Trap
200 mm or more
Less than 2m
2 m or more
Less than 2 m
Oil is accumulating in
outdoor units when
system stops
Oil is accumulating in lower level
outdoor units when system stops
Oil Trap
2 m or more
Oil Trap
Less than 2m
2 m or more
40 Outdoor Unit
Refrigerant piping installation
◆
The amount of Refrigerant
The calculation of the additional charge should take into account the length of pipe.
Additional charge (kg)
Product Charge(kg)
=
+
+
+
+
+
+=
+
Total liquid pipe (m): Ø22.2mm
x 0.354(kg/m)
x 0.266(kg/m)
x 0.173(kg/m)
x 0.118(kg/m)
x 0.061(kg/m)
x 0.022(kg/m)
Total liquid pipe (m): Ø19.05mm
Total liquid pipe (m): Ø15.88mm
Total liquid pipe (m): Ø12.7mm
Total liquid pipe (m): Ø9.52mm
Total liquid pipe (m): Ø6.35mm
CF(kg)
(Correction Factor)
Total amount(kg)
If a negative result is obtained from
the calculation, no refrigerant needs
to be added.
A
A B
B
CAUTION
B B B
BB
A
B
C
X
b
a
c d
34 5
21
e
Outdoor Unit
Indoor Unit
A: ø9.52, 40m
B: ø9.52, 20m
C: ø9.52, 20m
Ex
10HP
Additional Charge = A x 0.061 + B x 0.061 + C x 0.061
+ (a+b+c+d+e) x 0.022 + CF
= 40 x 0.061 + 20 x 0.061 + 20 x 0.061
+ (10 x 5) x 0.022 + (0) (CF)
= 5.98(kg)
a: ø6.35, 10m
b: ø6.35, 10m
c: ø6.35, 10m
d: ø6.35, 10m
e: ø6.35, 10m
◆ Special condition
In case of the No. of CST TQ/RAC SE/ARTCOOL SF models are over than 50% of the connected
indoor units when the total No. of connected indoor units are over than 50% of the max. connectable
indoor units.
■ Additional refrigerant charging amount (kg) :
= (A x + B x ß) - (AVG x ß)
• A = Total No. of TQ,SE and SF Indoor units,
= 0.5
• B = Total No. of except TQ,SE and SF Indoor units, ß = 0.3
• AVG = 50% of Max. No. of connectable Indoor units.
Example)
1) Installation Information
- Outdoor unit : 6HP
- Total indoor units : 6 units (TQ 3 units, SE 2 units, BH 1 unit)
2) Information from PDB
- Max. No. of connectable indoor units : 10 units
- Calculated additional refrigerant amount = 2 kg :
3) Indoor refrigerant charging amount
= (5 units x 0.5+1 unit x 0.3) - (5 units x 0.3) = 1.3 kg :
Revised the total additional charging amount = = 2 kg +1.3 kg
= 3.3 kg
Total amount(kg)
+=
AB+C
ENGLISH
Installation Manual 41
Refrigerant piping installation
WARNING
Regulation for refrigerant leakage
: the amount of refrigerant leakage should satisfy the following equation for human safety.
❐ If the above equation can not be satisfied, then follow the following steps.
- Selection of air conditioning system: select one of the next
1. Installation of effective opening part
2. Reconfirmation of Outdoor Unit capacity and piping length
3. Reduction of the amount of refrigerant
4. Installation of 2 or more security device (alarm for gas leakage)
- Change Indoor Unit type
: installation position should be over 2m from the floor (Wall mounted type → Cassette type)
- Adoption of ventilation system
: choose ordinary ventilation system or building ventilation system
- Limitation in piping work
: Prepare for earthquake and thermal stress
WARNING
Refer to model information since the CF Value of correction factor differs depending on model.
Total amount of refrigerant in the system
0.44 ( kg / m3)
Volume of the room at which Indoor Unit of the least capacity is installed
• Cooling Only
• Heat Pump
Note:
Fill in the f-gas Label attached on outdoor about the quantity of the fluorinated greenhouse gases
Manufacturing site (See Model Name label)
Installation site (If possible being placed adjacent to the service points for the addition or removal of
refrigerant)
The total Charge ( + )
HP 5 6 8 10 12 14 16 18 20 22 24 26
Product Charge(kg) 4.5 4.5 4.5 8 8 8 8 12.5 12.5 12.5 16 16
CF(kg) 0 0 -1 0 1 2 3 1 2 3 2 3
HP 28 30 32 34 36 38 40 42 44 46 48
Product Charge(kg) 16 16 16 20.5 20.5 20.5 24 24 24 24 24
CF(kg) 4 5 6 4 5 6 5 6 7 8 9
HP 5 6 8 10 12 14 16 18 20 22 24 26
Product Charge(kg) 4.5 4.5 8 8 8 8 8 12.5 12.5 12.5 16 16
CF(kg) 0 0 -1 0 1 2 3 1 2 3 2 3
HP 28 30 32 34 36 38 40 42 44 46 48
Product Charge(kg) 16 16 16 20.5 20.5 20.5 24 24 24 24 24
CF(kg) 4 5 6 4 5 6 5 6 7 8 9
42 Outdoor Unit
Refrigerant piping installation
1. Line Distribution
2. Vertical Distribution
Ensure that the branch pipes are attached vertically.
3. The others
Header
Slave
Master
Slave
Master
1st
1st
1st
Main pipe
Distribution
2nd
2nd
3rd
Slave
Master
Slave
Master
Slave
Master
Slave
Master
2nd
Main pipe
Distribution
Slave
Master
1st
3rd
3rd main pipe distribution
2nd
Distribution Method
ENGLISH
Installation Manual 43
Refrigerant piping installation
AVISO
Ao instalar e mover o ar condicionado para outro local, certifique-se de que recarrega o refrigerante
após a evacuação correcta.
- Se for misturado um refrigerante ou ar diferente com o refrigerante original, o ciclo do refrigerante pode
apresentar anomalias ou a unidade pode ficar danificada.
- Após seleccionar o diâmetro do tubo de refrigerante para se adequar à capacidade total da unidade interna
ligada depois da ramificação, use um tubo bifurcado adequado ao diâmetro do tubo da unidade interna e
ao esquema de instalação do tubo.
1 Tubagem do refrigerante 4 Isolante
2 Tubo a soldar 5 Válvula
3 Nitrogénio 6 Válvula de redução da pressão
6
2
45
1
3
44 Outdoor Unit
Refrigerant piping installation
Branch pipe Fitting
Y branch
A
B
To Outdoor Unit
To Branch Piping or Indoor Unit
A
B
Facing
upwards
Facing
downwards
Within ± 3° Within ± 3°
Viewed from point A
in direction of arrow
Horizontal
plane
Within +/- 10°
A
Insulator
(included with kit)
Liquid and gas
pipe joints
Insulator for
field piping
Tape
(field supply)
A
B
Header
To outdoor unit
To indoor unit
A
B
C
• Ensure that the branch pipes are attached horizontally or vertically (see the diagram below.)
• There is no limitation on the joint mounting configuration.
• If the diameter of the refrigerant piping selected by the procedures described is different from the size
of the joint, the connecting section should be cut with a pipe cutter.
• Branch pipe should be insulated with the insulator in each kit.
• When the number of pipes to be connected is
smaller than the number of header branches,
install a cap to the unconnected branches.
• The indoor unit having larger capacity must be
installed closer to than smaller one.
• If the diameter of the refrigerant piping selected
by the procedures described is different from
the size of the joint,
the connecting section
should be cut with a pipe cutter.
Pipe cutter
ENGLISH
Installation Manual 45
Refrigerant piping installation
• When the number of indoor units to be connected to the branch pipes is less than the number of branch
pipes available for connection then cap pipes should be fitted to the surplus branches.
• Fit branch pipe lie in a horizontal plane.
• Header should be insulated with the insulator in each kit.
• Joints between branch and pipe should be sealed with the tape included in each kit.
• Any cap pipe should be insulated using the insulator provided with each kit and then taped as described
above.
B
Pinched pipe
Horizontal plane
View from point B in the direction of the arrow
Insulate the header using
the insulation
material attached to the
branch pipe kit
as shown in the figure.
Insulator
Insulator of field pipe
Tape
Tape
Cap pipe
Insulator for cap pipe
46 Outdoor Unit
Refrigerant piping installation
◆ Y branch pipe
Models Gas pipe Liquid pipe
ARBLN01621
ARBLN03321
ARBLN07121
I.D. 15.88
I.D25.4
O.D19.05
I.D31.8
I.D31.8
I.D. 12.7
I.D22.2
I.D22.2
I.D28.58
I.D19.05
O.D22.2
I.D28.58
I.D25.4
I.D22.2
O.D19.05
I.D12.7
I.D12.7
I.D15.88
I.D15.88
O.D19.05
I.D19.05
I.D19.05
I.D22.2
I.D. 15.88
I.D22.2
I.D15.88
I.D. 15.88
I.D19.05
I.D12.7
I.D19.05
I.D15.88
I.D12.7
I.D28.58
I.D12.7
I.D6.35
I.D12.7
I.D12.7
I.D19.05
O.D12.7
I.D9.52
I.D9.52
I.D15.88
I.D9.52
I.D6.35
I.D9.52
I.D9.52
I.D9.52
I.D9.52
I.D15.88
I.D15.88
O.D12.7
I.D9.52
I.D12.7
I.D12.7
I.D19.05
[unit:mm]
I.D6.35
I.D6.35
I.D6.35
I.D6.35
I.D12.7
I.D12.7
I.D19.05
I.D34.9
O.D38.1
O.D28.58
I.D38.1
I.D34.9
I.D22.2
I.D28.58
I.D28.58
I.D22.2
I.D19.05
ARBLN14521
O.D22.2
I.D34.9
I.D15.88
I.D19.05
I.D38.1
I.D12.7
I.D41.3
2 X
I.D41.3
O.D15.88
For example. Indicated Ø9.52 is the outer diameter(O.D..) of field jointed piping
I.D15.88
I.D22.2
I.D19.05
O.D15.88
I.D12.7
I.D22.2
I.D9.52
O.D19.05
I.D22.2
I.D19.05
O.D12.7
I.D19.05
I.D15.88
I.D12.7
I.D15.88
I.D6.35
I.D9.52
ENGLISH
Installation Manual 47
Refrigerant piping installation
◆ Header
I.D Ø15.88
I.D Ø12.7
I.D Ø15.88
I.D Ø12.7
I.D Ø19.05
O.D Ø19.05
I.D Ø15.88
I.D Ø12.7
I.D Ø9.52
I.D Ø9.52
I.D Ø6.35
I.D Ø6.35
I.D Ø12.7
O.D Ø12.7 I.D Ø9.52
I.D Ø15.88
I.D Ø12.7
I.D Ø15.88
I.D Ø12.7
I.D Ø19.05
O.D Ø19.05
I.D Ø15.88
I.D Ø12.7
I.D Ø9.52
I.D Ø6.35
I.D Ø9.52
I.D Ø6.35
I.D Ø12.7
O.D Ø12.7 I.D Ø9.52
I.D Ø15.88
I.D Ø12.7
I.D Ø28.58
I.D Ø19.05
I.D Ø15.88
O.D Ø28.58
I.D Ø22.2
I.D Ø25.4
I.D Ø9.52
I.D Ø6.35
I.D Ø9.52
I.D Ø12.7
I.D Ø6.35
O.D Ø12.7
I.D Ø9.52
I.D Ø15.88
I.D Ø12.7
I.D Ø28.58
I.D Ø19.05
I.D Ø15.88
O.D Ø28.58
I.D Ø22.2
I.D Ø25.4
I.D Ø9.52
I.D Ø6.35
I.D Ø9.52
I.D Ø12.7
I.D Ø6.35
O.D Ø12.7
I.D Ø9.52
I.D Ø15.88
I.D Ø12.7
I.D Ø28.58
I.D Ø19.05
I.D Ø15.88
O.D Ø28.58
I.D Ø22.2
I.D Ø25.4
I.D Ø9.52I.D Ø6.35
I.D Ø9.52
I.D Ø12.7
I.D Ø6.35
O.D Ø12.7 I.D Ø9.52
I.D Ø15.88
I.D Ø15.88
I.D Ø19.05
I.D Ø31.8
I.D Ø38.1
I.D Ø12.7
O.D Ø38.1
I.D Ø34.9
I.D Ø28.58
I.D Ø6.35
I.D Ø9.52
I.D Ø9.52 I.D Ø6.35
I.D Ø15.88
I.D Ø19.05
O.D Ø19.05 I.D Ø15.88
[unit:mm]
4 branch
ARBL054
7 branch
ARBL057
4 branch
ARBL104
7 branch
ARBL107
10 branch
ARBL1010
10 branch
ARBL2010
Models Gas pipe Liquid pipe
48 Outdoor Unit
Refrigerant piping installation
Leak Test and Vacuum drying
(1) Leak test
Leak test should be m
ade by pressurizing nitrogen gas to 3.8 MPa(38.7kgf/cm2). If the pressure does not drop for
24 hours, the system passes the test. If the pressure drops, check where the nitrogen leaks. For the test method,
refer to the following figure. (Make a test with the service valves closed. Be also sure to pressurize liquid pipe, gas
pipe and high/low pressure common pipe)
The test result can be judged good if the pressure has not be reduced after leaving for about one day after completion of nitrogen gas pressurization.
Note:
If the ambient temperature differs between the time when pressure is applied and when the pressure drop is
checked, apply the following correction factor
There is a pressure change of approximately 0.1 kg/cm2(0.01 MPa) for each 1°C of temperature difference.
Correction= (Temp. at the time of pressurization – Temp. at the time of check) X 0.1
For example: Temperature at the time of pressurization (3.8 MPa) is 27 °C
24 hour later: 3.73 MPa, 20°C
In this case the pressure drop of 0.07 is because of temperature drop
And hence there is no leakage in pipe occurred.
Caution:
To prevent the nitrogen from entering the refrigeration system in the liquid state, the top of the cylinder must be
at higher position than the bottom when you pressurize the system.
Usually the cylinder is used in a vertical standing position.
Slave 2 outdoor unit Slave 1 outdoor unit Master outdoor unit
Close
Close
Close
Close
Close
Close
Nitrogen gas
cylinder
Nitrogen gas
cylinder
common pipe
High/low pressure
Liquide pipe
Gas pipe
CloseClose
common pipe
High/low pressure
Liquide pipe
Gas pipe
Close
common pipe
High/low pressure
Liquide pipe
Gas pipe
Liquid side
Indoor unit
Gas side
ENGLISH
Installation Manual 49
Refrigerant piping installation
(2) Vacuum
Vacuum drying should be made from the service port provided on the outdoor unit’s service valve to the vacuum pump commonly used for liquid pipe, gas pipe and high/low pressure common pipe. (Make Vacuum
from liquid pipe, gas pipe and high/low pressure common pipe with the service valve closed.)
* Never perform air purging using refrigerant.
• Vacuum drying: Use a vacuum pump that can evacuate to -100.7kPa (5 Torr, -755mmHg).
1. Evacuate the system from the liquid and gas pipes with a vacuum pump for over 2 hrs and bring the system to -100.7kPa.
After maintaining system under that condition for over 1 hr, confirm the vacuum gauge rises. The system
may contain moisture or leak.
2. Following should be executed if there is a possibility of moisture remaining inside the pipe.
(Rainwater may enter the pipe during work in the rainy season or over a long period of time)
After evacuating the system for 2 hrs, give pressure to the system to 0.05MPa(vacuum break) with nitrogen gas and then evacuate it again with the vacuum pump for 1hr to -100.7kPa(vacuum drying). If the
system cannot be evacuated to -100.7kPa within 2 hrs, repeat the steps of vacuum break and its drying.
Finally, check if the vacuum gauge does not rise or not, after maintaining the system in vacuum for 1 hr.
WARNING
When installing and moving the air conditioner to another site, recharge after perfect evacuation.
- If a different refrigerant or air is mixed with the original refrigerant, the refrigerant cycle may malfunction and
the unit may be damaged.
Note : Always add an appropriate amount of refrigerant. (For the refrigerant additional charge)
Too much or too little refrigerant will cause trouble.
To use the Vacuum Mode
(If the Vacuum mode is set, all valves of Indoor units and Outdoor units will be opened.)
Slave 2 outdoor unit Slave 1 outdoor unit Master outdoor unit
Vacuum pump
Close
Close
Close
Close
Close
Close
Vacuum pump
Scale
Use a graviometer. (One that can measure
down to 0.1kg). If you are unable to prepare
such a high-precision gravimeter you may
use a charge cylinder.
common pipe
High/low pressure
Liquide pipe
Gas pipe
CloseClose
common pipe
High/low pressure
Liquide pipe
Gas pipe
Close
common pipe
High/low pressure
Liquide pipe
Gas pipe
Liquid side
Indoor unit
Gas side
50 Outdoor Unit
Refrigerant piping installation
Vacuum Mode
This function is used for creating vacuum in the system after compressor replacement, ODU parts replacement or IDU addition/replacement.
Master main PCB DIP switch ON ( No.11,14)
Vacuum mode setting
ODU V/V OPEN
Main EEV, SC EEV OPEN
IDU EEV OPEN
ODU power reset
Press the black button Main PCB (5 sec.)
Main PCB
SW01S
Main PCB
SW02B
Main PCB
SW01V
ODU operation stops during vacuum mode. Compressor can't operate.
Vacuum mode setting method Vacuum mode cancellation method
Master main PCB DIP switch OFF( No.11,14)
Power reset
Vacuum mode cancellation
Caution
ENGLISH
Installation Manual 51
Refrigerant piping installation
Thermal insulation of refrigerant piping
Heat
insulation
material
Outer
covering
Adhesive + Heat - resistant polyethylene foam +
Adhesive tape
Indoor Vinyl tape
Floor exposed
Water-proof hemp cloth + Bronze asphalt
Outdoor
Water-proof hemp cloth + Zinc plate + Oily paint
Note:
When using polyethylene cover as covering material, asphalt roofing shall not be required.
• Do not insulate gas or low pressure pipe and liquid or high
pressure pipe together.
• Be sure to fully insulate connecting portion.
Liquid pipe
Gas pipe
Power lines
Finishing tape
Insulating material
Bad example
Good example
These parts are not insulated.
B A C
A
B
C
A
C
D
E
A
B
C
D
E
Communication lines
F
Liquid pipe
Communication lines
Communication lines
Separation
Gas pipe
Power lines
Insulating material
A
B
C
D
E
A
A
B
F
Heat insulation material
Pipe
Outer covering
(Wind the connection part and cutting part of
heat insulation material with a finishing tape.)
Power lines
E
D
D
B
A
C
Be sure to give insulation work to refrigerant piping by covering liquid pipe and gas pipe separately with
enough thickness heat-resistant polyethylene, so that no gap is observed in the joint between indoor unit
and insulating material, and insulating materials themselves. When insulation work is insufficient, there is a
possibility of condensation drip, etc. Pay special attention to insulation work to ceiling plenum.
1m1m
A
B
D
F
G
B
G
D
B
H
I
J
A
E
B
I
A
B
D
C
Inner wall (concealed)
Floor (fireproofing)
Penetrating portion on fire
limit and boundary wall
Roof pipe shaft
Outer wall Outer wall (exposed)
Penetrations
Sleeve
Heat insulating material
Lagging
Caulking material
Band
Waterproofing layer
Sleeve with edge
Lagging material
Mortar or other incombustible caulking
Incombustible heat insulation material
When filling a gap with mortar, cover the
penetration part with steel plate so that
the insulation material will not be caved in.
For this part, use incombustible materials
for both insulation and covering.(Vinyl
covering should not be used.)
52 Outdoor Unit
Master Slave1 Slave2
Master Slave1 Slave2
Master Slave1 Slave2
Master Slave1 Slave2
Remote
controller
Remote
controller
Indoor
Unit
Indoor
Unit
Remote
controller
Outdoor Unit
Outdoor Unit
Outdoor Unit
Outdoor Unit
Remote
controller
Indoor
Unit
Indoor
Unit
Remote
controller
Remote
controller
Indoor
Unit
Indoor
Unit
Remote
controller
Remote
controller
Indoor
Unit
Indoor
Unit
2-Core Shield Cable Multi-Core Cable
Electrical Wiring
Electrical Wiring
Caution
Remote
control
Remote
control
Remote
control
Remote
control
Indoor
Unit
Outdoor Unit
Outdoor Unit
Outdoor Unit
Outdoor Unit
Indoor
Unit
Remote
control
Remote
control
Indoor
Unit
Indoor
Unit
Remote
control
Remote
control
Indoor
Unit
Indoor
Unit
Indoor
Unit
Indoor
Unit
CAUTION
Be sure to correct the outdoor unit to earth. Do not connect earth line to any gas pipe, water pipe,
lightening rod or telephone earth line. If earth is incomplete, it may cause an electric shock.
WARNING
Be sure to have authorized electrical engineers do the electric work using special circuits in accordance with regulations and this
installation manual. If power supply circuit has a lack of capacity or electric work deficiency, it may cause an electric shock or fire.
1. Follow ordinance of your governmental organization for technical standard related to electrical equipment,
wiring regulations and guidance of each electric power company.
2. Install the Outdoor Unit communication line away from the power source wiring so that it is not affected by
electric noise from the power source. (Do not run it through the same conduit.)
3. Be sure to provide designated grounding work to Outdoor Unit.
4. Give some allowance to wiring for electrical part box of Indoor and Outdoor Units, because the box is sometimes removed at the time of service work.
5.
Never connect the main power source to terminal block of communication line. If connected, electrical parts will be burnt out.
6. Use 2-core shield cable for communication line.(O mark in the figure below) If communication lines of different systems are wired with the same multiplecore cable, the resultant poor transmitting and receiving will
cause erroneous operations. ( mark in the figure below)
7.
Only the communication line specified should be connected to the terminal block for Outdoor Unit communication.
2-Core Shield Cable Multi-Core Cable
ENGLISH
Installation Manual 53
Electrical Wiring
CAUTION
• Use the 2-core shield cables for communication lines. Never use them together with power cables.
• The conductive shielding layer of cable should be grounded to the metal part of both units.
• Never use multi-core cable
• As this unit is equipped with an inverter, to install a phase leading capacitor not only will deteriorate
power factor improvement effect, but also may cause capacitor abnormal heating. Therefore, never
install a phase leading capacitor.
• Make sure that the power unbalance ratio is not greater than 2%. If it is greater the units lifespan will
be reduced.
When none are available, follow the instructions below.
• Do not connect wiring of different thicknesses to the power terminal block. (Slack in the power wiring
may cause abnormal heat.)
• When connecting wiring which is the same thickness, do as shown in the figure below.
• For wiring, use the designated power wire and connect firmly, then secure to prevent outside pressure
being exerted on the terminal block.
• Use an appropriate screwdriver for tightening the terinal screws. A screwdriver with a small head will
strip the head and make proper tighterning impossible.
• Over-tightening the terminal screws may break them.
u Precautions when laying power wiring
Round pressure terminal
Power wire
different thicknesses.
Use round pressure terminals for connections to the power terminal block.
CAUTION
When the 400 volt power supply is applied to “N” phase by mistake, replace inverter PCB and transformer in
control box.
CAUTION
The Power cord connected to the unit should be selected according to the following specifications.
54 Outdoor Unit
Electrical Wiring
Control box and connecting position of wiring
- Remove all of the screws at front panel and remove the panel by pulling it forward.
- Connect communication line between main and sub
outdoor unit through the terminal block.
- Connect communication lines between outdoor unit
and indoor units through the terminal block.
- When the central control system is connected to the
outdoor unit, a dedicated PCB must be connected
between them.
- When connecting communication line between outdoor unit and indoor units with shielded wire, connect the shield ground to the earth screw.
WARNING
The temperature sensor for outdoor air should not be exposed to direct sunlight.
- Provide an appropriate cover to intercept direct sunlight.
Front Panel
UW1 Chassis
Reactor
Bridge
diode
Inverter
PCB
Inverter
FAN PCB
Take care of the phase sequence
of 3-phase 4-wire power system
Noise
Filter
Main
PCB
Magnet
switch
Reactor
Inverter
PCB
Bridge
diode
Inverter
FAN PCB
UY2 Chassis
Take care of the phase sequence
of 3-phase 4-wire power system
Main PCB
Noise Filter
ENGLISH
Installation Manual 55
Electrical Wiring
Communication and Power Lines
1) Communication cable
• Types : shielding wire
• Cross section : over 1.25mm
2
• Maximum allowable temperature: 60°C
• Maximum allowable line length: under 300m
2) Remote control cable
• Types : 3-core cable
3) Simple central control cable
• Types : 4-core cable (Shielding wire)
• Cross section : over 0.75mm
2
4) Separation of communication and power lines
• If communication and power lines are run alongside each other then there is a strong likelihood of operational faults developing due to interference in the signal wiring caused by electrostatic and electromagnetic
coupling.
The tables below indicates our recommendation as to appropriate spacing of communication and power
lines where these are to be run side by side
Note:
1. The figures are based on assumed length of parallel cabling up to 100m. For length in excess of 100m
the figures will have to be recalculated in direct proportion to the additional length of line involved.
2. If the power supply waveform continues to exhibit some distortion the recommended spacing in the
table should be increased.
• If the lines are laid inside conduits then the following point must also be taken into account when grouping
various lines together for introduction into the conduits
• Power lines(including power supply to air conditioner) and signal lines must not be laid inside the same
• In the same way, when grouping the lines power and signal lines should not be bunched together.
Current capacity of power line Spacing
10A 300mm
50A 500mm
100A 1000mm
Exceed 100A 1500mm
100V or more
CAUTION
■ If apparatus is not properly earthed then there is always a risk of electric shocks, the earthing of the
apparatus must be carried out by a qualified person.
56 Outdoor Unit
Electrical Wiring
1. Use a separate power supply for the Outdoor Unit and Indoor Unit.
2. Bear in mind ambient conditions (ambient temperature,direct sunlight, rain water,etc.) when proceeding with the wiring and connections.
3. The wire size is the minimum value for metal conduit wiring. The power cord size should be 1 rank
thicker taking into account the line voltage drops. Make sure the power-supply voltage does not drop
more than 10%.
4. Specific wiring requirements should adhere to the wiring regulations of the region.
5. Power supply cords of parts of appliances for outdoor use should not be lighter than polychloroprene
sheathed flexible cord.
6. Don't install an individual switch or electrical outlet to disconnect each of indoor unit separately from
the power supply.
WARNING
• Follow ordinance of your governmental organization for technical standard related to electrical equipment, wiring regulations and guidance of each electric power company.
• Make sure to use specified wires for connections so that no external force is imparted to terminal connections. If connections are not fixed firmly, it may cause heating or fire.
• Make sure to use the appropriate type of overcurrent protection switch. Note that generated overcurrent may include
some amount of direct current.
CAUTION
•
Some installation site may require attachment of an earth leakage breaker. If no earth leakage breaker is installed, it may
cause an electric shock.
• Do not use anything other than breaker and fuse with correct capacity. Using fuse and wire or copper wire with too large
capacity may cause a malfunction of unit or fire.
◆ Wiring of Main Power Supply and Equipment Capacity
ENGLISH
Installation Manual 57
Electrical Wiring
50Hz
34 34 34
The GND terminal is a '–' terminal for the central controller, not Ground Line
Between Indoor and Master Outdoor unit
IDUSODU DRY1 DRY2 GND
INTERNET
BABA
12V
Master
Outdoor unit
3 Phase 4 Wires
Power supply
50Hz 380~415V
3 Phase 4 Wires Power line(R, S, T, N)
Communication line (3 line): Wired remote control
Single Phase of power supply line(L, N)
Communication line (2 shield line): Between Indoor Unit and Outdoor Unit
Power supply switch
(Switch fuse : ELCB)
(Main Switch)
Power supply
1 Phase 50Hz
220~240V
Power supply switch
(Switch)
Pull Box(Installer Option)
◆ Example Connection of Communication Cable
1 Outdoor Unit(Half size)
WARNING
• Indoor Unit ground Lines are required for preventing electrical shock accident during current leakage,
Communication disorder by noise effect and motor current leakage (without connection to pipe).
• Don't install an individual switch or electrical outlet to disconnect each of indoor unit separately from
the power supply.
• Install the main switch that can interrupt all the power sources in an integrated manner because this
system consists of the equipment utilizing the multiple power sources.
• If there exists the possibility of reversed phase, lose phase, momentary blackout or the power goes on
and off while the product is operating, attach a reversed phase protection circuit locally.
Running the product in reversed phase may break the compressor and other parts.
58 Outdoor Unit
Electrical Wiring
3 Phase 4 Wires Power line(R, S, T, N)
Communication line (3 line): Wired remote control
Single Phase of power supply line(L, N)
Communication line (2 shield line): Between Indoor Unit
and Outdoor Unit
34 34 34
The GND terminal is a '–' terminal for the central controller, not Ground Line
Between Indoor and Master Outdoor unit
IDUSODU DRY1 DRY2 GND
INTERNET
BABA
12V
Master
Outdoor unit
3 Phase 4 Wires
Power supply
50Hz 380~415V
Power supply switch
(Switch fuse : ELCB)
(Main Switch)
Power supply
1 Phase 50Hz
220~240V
Power supply switch
(Switch)
Pull Box(Installer Option)
◆ Example Connection of Communication Cable
1 Outdoor Unit
WARNING
• Indoor Unit ground Lines are required for preventing electrical shock accident during current leakage,
Communication disorder by noise effect and motor current leakage (without connection to pipe).
• Don't install an individual switch or electrical outlet to disconnect each of indoor unit separately from
the power supply.
• Install the main switch that can interrupt all the power sources in an integrated manner because this
system consists of the equipment utilizing the multiple power sources.
• If there exists the possibility of reversed phase, lose phase, momentary blackout or the power goes on
and off while the product is operating, attach a reversed phase protection circuit locally.
Running the product in reversed phase may break the compressor and other parts.
ENGLISH
Installation Manual 59
Electrical Wiring
Power supply switch
(Switch fuse : ELCB)
3 Phase Power line(R, S, T, N)
Communication line (3 line): Wired remote control
Single Phase of power supply line (L, N)
Communication line (2 shield line):
Between Outdoor Unit and Outdoor Unit
Communication line (2 shield line):
Between Indoor Unit and Outdoor Unit
Between Indoor and Master Outdoor unit
3 Phase
Power supply
50Hz 380~415V
The GND terminal is a '–' terminal for the central controller, not Ground Line
• Make sure that terminal number of master and slave outdoor units are matched.(A-A,B-B)
Master
Slave
Slave
Outdoor unit
Power supply switch
(Switch fuse : ELCB)
3 Phase 4 Wires
Power supply
50Hz 380~415V
■ When the power source is supplied to
Each outdoor unit individually.
■ When the power source is connected
In series between the units.
(Main Switch)
(Main Switch)
IDUSODU DRY1 DRY2 GND
INTERNET
BA
12V
Master
Outdoor unit
IDUSODU DRY1 DRY2 GND
INTERNET
BA
12V
Master
Outdoor unit
IDUSODU DRY1 DRY2 GND
INTERNET
B
B
B
BA
A
A
A
12V
Power supply
1 Phase 50Hz
220~240V
Power supply switch
(Switch)
Pull Box(Installer Option)
Power supply
1 Phase 50Hz
220~240V
Power supply switch
(Switch)
Pull Box(Installer Option)
◆ Example Connection of Communication Cable
2 Outdoor Unit
WARNING
• Indoor Unit ground Lines are required for preventing electrical shock accident during current leakage,
Communication disorder by noise effect and motor current leakage (without connection to pipe).
• Don't install an individual switch or electrical outlet to disconnect each of indoor unit separately from the power supply.
• Install the main switch that can interrupt all the power sources in an integrated manner because this system consists of the
equipment utilizing the multiple power sources.
• If there exists the possibility of reversed phase, lose phase, momentary blackout or the power goes on and off while the prod-
uct is operating, attach a reversed phase protection circuit locally.
Running the product in reversed phase may break the compressor and other parts.
60 Outdoor Unit
Electrical Wiring
Power supply switch
(Switch fuse : ELCB)
3 Phase 4 Wires Power line(R, S, T, N)
Communication line (3 line): Wired remote control
Single Phase of power supply line(L, N)
Communication line (2 shield line):
Between Outdoor Unit and Outdoor Unit
Communication line (2 shield line):
Between Indoor Unit and Outdoor Unit
3 Phase 4 Wires
Power supply
50Hz 380~415V
The GND terminal is a '–' terminal for the central controller, not Ground Line
• Make sure that terminal number of master and slave outdoor units are matched.(A-A,B-B)
Slave
Master
Between Indoor and Master Outdoor unit
Slave
Outdoor unit
Power supply switch
(Switch fuse : ELCB)
■ When the power source is supplied to
Each outdoor unit individually.
3 Phase 4 Wires
Power supply
50Hz 380~415V
■ When the power source is connected
In series between the units.
(Main Switch)
(Main Switch)
IDUSODU DRY1 DRY2 GND
INTERNET
BA
12V
Master
Outdoor unit
IDUSODU DRY1 DRY2 GND
INTERNET
BA
12V
IDUSODU DRY1 DRY2 GND
INTERNET
B
B
B
BA
A
A
A
12V
Master
Outdoor unit
Power supply
1 Phase 50Hz
220~240V
Power supply switch
(Switch)
Pull Box(Installer Option)
Power supply
1 Phase 50Hz
220~240V
Power supply switch
(Switch)
Pull Box(Installer Option)
◆ Example Connection of Communication Cable
2 Outdoor Units
WARNING
• Indoor Unit ground Lines are required for preventing electrical shock accident during current leakage,
Communication disorder by noise effect and motor current leakage (without connection to pipe).
• Don't install an individual switch or electrical outlet to disconnect each of indoor unit separately from the power supply.
• Install the main switch that can interrupt all the power sources in an integrated manner because this system consists of the
equipment utilizing the multiple power sources.
• If there exists the possibility of reversed phase, lose phase, momentary blackout or the power goes on and off while the prod-
uct is operating, attach a reversed phase protection circuit locally.
Running the product in reversed phase may break the compressor and other parts.
ENGLISH
Installation Manual 61
Electrical Wiring
Power supply switch
(Switch fuse : ELCB)
3 Phase 4 Wires Power line (R, S, T, N)
Communication line (3 line): Wired remote control
Single Phase of power supply line (L, N)
Communication line (2 shield line):
Between Outdoor Unit and Outdoor Unit
3 Phase 4 Wires
Power supply
50Hz 380~415V
The GND terminal is a '–' terminal for the
central controller, not Ground Line
• Make sure that terminal number of master and slave outdoor units are matched.(A-A,B-B)
Communication line (2 shield line):
Between Indoor Unit and Outdoor Unit
Master
Slave1
Slave2
Between Indoor and Master Outdoor unit
Slave1
Outdoor unit
Master
Outdoor unit
Slave2
Outdoor unit
Power supply switch
(Switch fuse : ELCB)
3 Phase 4 Wires
Power supply
50Hz 380~415V
■ When the power source is supplied to
Each outdoor unit individually.
■ When the power source is connected
In series between the units.
(Main Switch)
(Main Switch)
IDUSODU DRY1 DRY2 GND
INTERNET
BA
12V
IDUSODU DRY1 DRY2 GND
INTERNET
BA
12V
IDUSODU DRY1 DRY2 GND
INTERNET
BA
12V
IDUSODU DRY1 DRY2 GND
INTERNET
B
B
B
B
BA
A
A
A
A
12V
Master
Outdoor unit
Power supply
1 Phase 50Hz
220~240V
Power supply switch
(Switch)
Pull Box(Installer Option)
Power supply
1 Phase 50Hz
220~240V
Power supply switch
(Switch)
Pull Box(Installer Option)
◆ Example Connection of Communication Cable
3 Outdoor Units
WARNING
• Indoor Unit ground Lines are required for preventing electrical shock accident during current leakage,
Communication disorder by noise effect and motor current leakage (without connection to pipe).
• Don't install an individual switch or electrical outlet to disconnect each of indoor unit separately from the power supply.
• Install the main switch that can interrupt all the power sources in an integrated manner because this system consists of
the equipment utilizing the multiple power sources.
• If there exists the possibility of reversed phase, lose phase, momentary blackout or the power goes on and off while the
product is operating, attach a reversed phase protection circuit locally.
Running the product in reversed phase may break the compressor and other parts.
62 Outdoor Unit
Electrical Wiring
Power supply switch
(Switch fuse : ELCB)
3 Phase 4 Wires Power line(R, S, T, N)
Communication line (3 line): Wired remote control
Single Phase of power supply line(L,N)
Communication line (2 shield line):
Between Outdoor Unit and Outdoor Unit
3 Phase 4 Wires
Power supply
50Hz 380~415V
Master
Slave1
Slave2
Communication line (2 shield line):
Between Indoor Unit and Outdoor Unit
Power supply switch
(Switch fuse : ELCB)
3 Phase 4 Wires
Power supply
50Hz 380~415V
■ When the power source is supplied to
Each outdoor unit individually.
■ When the power source is connected
In series between the units.
(Main Switch)
(Main Switch)
The GND terminal is a '–' terminal for the
central controller, not Ground Line
Between Indoor and Master Outdoor unit
Slave1
Outdoor unit
Master
Outdoor unit
Slave2
Outdoor unit
IDUSODU DRY1 DRY2 GND
INTERNET
BA
12V
IDUSODU DRY1 DRY2 GND
INTERNET
BA
12V
IDUSODU DRY1 DRY2 GND
INTERNET
BA
12V
IDUSODU DRY1 DRY2 GND
INTERNET
B
B
B
B
BA
A
A
A
A
12V
Master
Outdoor unit
Power supply
1 Phase 50Hz
220~240V
Power supply switch
(Switch)
Pull Box(Installer Option)
Power supply
1 Phase 50Hz
220~240V
Power supply switch
(Switch)
Pull Box(Installer Option)
◆ Example Connection of Communication Cable
3 Outdoor Units
WARNING
• Indoor Unit ground Lines are required for preventing electrical shock accident during current leakage,
Communication disorder by noise effect and motor current leakage (without connection to pipe).
• Don't install an individual switch or electrical outlet to disconnect each of indoor unit separately from the power supply.
• Install the main switch that can interrupt all the power sources in an integrated manner because this system consists of
the equipment utilizing the multiple power sources.
• If there exists the possibility of reversed phase, lose phase, momentary blackout or the power goes on and off while the
product is operating, attach a reversed phase protection circuit locally.
Running the product in reversed phase may break the compressor and other parts.
Electrical Wiring
ENGLISH
Installation Manual 63
◆ Example Connection of Communication Cable
[BUS type]
• Connection of communication cable must be
installed like below figure between indoor unit to outdoor unit.
[STAR type]
• Abnormal operation can be caused by communication defect, when connection of communication cable
is installed like below figure(STAR type).
64 Outdoor Unit
Electrical Wiring
Location of setting Switch
Main PCB
SW01B
(DIP S/W)
SW02B
(DIP S/W)
7 - Segment
SW02V
Auto addressing
SW01V
Data confirm
ENGLISH
Installation Manual 65
Electrical Wiring
DIP switch setting
■ Checking according to dip switch setting
1. You can check the setting values of the Master outdoor unit from the 7 segment LED.
The dip switch setting should be changed when the power is OFF.
2. It checks whether the input is properly performed without the bad contact of the dip switch or not
■ Checking the setting of the Master unit
The number is sequentially appeared at the 7 segment in 5 seconds after applying the power. This
number represents the setting condition. (For example, represents R410A 30HP)
Master model code ➔ Slave1 model code ➔ Slave2 model code ➔ total capacity ➔ 2 ➔ 25 ➔ 150
1 ~255 : Master model code
1 ~255 : Slave1 model code
1 ~255 : Slave2 model code
5~48HP : HP number(sum of master capacity and slave capacity)
No display : cooling only 2 : heat pump
25 : normal
150 : Model Type(ARUN-T2,ARUV-T2)
Example) 30Hp, R410A
66 → 65 → 30 → 2 → 25 → 150
CAUTION
Product may not properly operate if the relevant DIP switch is not properly setup.
}
Refer to table code
Model Code
Model Code Unit (HP) Unit Ref.
160 5
161 6
162 8
R410A
163 10
164 12
165 14
166 16
Master &
Slave
Master
66 Outdoor Unit
Electrical Wiring
■ Setting the DIP switch
• If you set the Dip switch when power is on, the changed setting will not be applied immediately.
The changed setting will be enabled only when Power is reset or by pressing Reset button.
1. Settings of Master outdoor unit
Stand
ard
Short Pipe
Length
Long Pipe Length
Longest Pipe
Length
Refrigerant
Auto Charging
Refrigerant
Checking
SW01B Setting
ON
ON
1234567ON1234567
1234567ON1234567
1234567 891011121314
1234567 891011121314
ON
ON
1234567ON1234567
1234567ON1234567
1234567 891011121314
1234567 891011121314
ON
ON
ON
1234567ON1234567
1234567ON1234567
1234567ON1234567
1234567 891011121314
1234567 891011121314
ON
ON
1234567ON1234567
1234567ON1234567
1234567 891011121314
1234567 891011121314
ON
ON
1234567ON1234567
1234567ON1234567
1234567 891011121314
1234567 891011121314
ON
ON
1234567ON1234567
1234567ON1234567
1234567 891011121314
1234567 891011121314
RemarksSW02B SettingFunction SW01B Setting RemarksSW02B SettingFunction
Power reset is
necessary
Factory Setting
Power reset is
necessary
- Cooling Target Pressure:
Standard+39
- Heating Target Pressure:
Standard-131
Power reset is
necessary
- Cooling Target Pressure:
Standard-39
- Heating Target Pressure:
Standard+131
Power reset is
necessary
- Cooling Target Pressure:
Standard-79
- Heating Target Pressure:
Standard+229
Dip SW setting
+ Black button
(SW01V)
Dip SW setting
+ Black button
(SW01V)
Cool/Heat
Selector
1234567ON1234567
1234567ON1234567
1234567 891011121314
1234567 891011121314
* In long piping mode, power consumption will be increased.
ON
ON
Power reset is
necessary
Optional device
ENGLISH
Installation Manual 67
Electrical Wiring
Note: Oil collecting operation is default function which operates after every six hours.
• To enable forced operation of this function change the dip switch setting. And after using, make sure to
restore the dip switch setting.
Snow
Forced
Defrosting
Outdoor Unit Fan
Low Static
Pressure
Compensation
Outdoor Unit Fan
High Static
Pressure
Compensation
Night silent
operation
Pump Down
Pump Out
Forced Oil Return
Vacuum Mode
SW01B Setting
ON
ON
1234567ON1234567
1234567ON1234567
1234567 891011121314
1234567 891011121314
ON
ON
1234567ON1234567
1234567ON1234567
1 2 3 4 5 6 7 8 9 10 11 12 13 14
1 2 3 4 5 6 7 8 9 10 11 12 13 14
ON
ON
1234567ON1234567
1234567ON1234567
1 2 3 4 5 6 7 8 9 10 11 12 13 14
1 2 3 4 5 6 7 8 9 10 11 12 13 14
ON
ON
1234567ON1234567
1234567ON1234567
1 2 3 4 5 6 7 8 9 10 11 12 13 14
1 2 3 4 5 6 7 8 9 10 11 12 13 14
ON
ON
1234567ON1234567
1234567ON1234567
1234567 891011121314
1234567 891011121314
ON
ON
1234567ON1234567
1234567ON1234567
1234567 891011121314
1234567 891011121314
ON
ON
1234567ON1234567
1234567ON1234567
1234567 891011121314
1234567 891011121314
ON
ON
1234567ON1234567
1234567ON1234567
1234567 891011121314
1234567 891011121314
ON
ON
1234567ON1234567
1234567ON1234567
1 2 3 4 5 6 7 8 9 10 11 12 13 14
1 2 3 4 5 6 7 8 9 10 11 12 13 14
RemarksSW02B SettingFunction SW01B Setting RemarksSW02B SettingFunction
Used when snow piles up
On the ODU Fan.
Fan operates periodically.
Accelerates defrost
operation
Power reset is
necessary
Power reset is
necessary
Power reset is
necessary
Fan RPM down
at on night time
Power reset is
necessary
All the refrigerant flows
back into the ODU
Power reset is
necessary
Refrigerant from the
broken ODU flows into the
remaining units
Refer Service manual
Dip switch +
Black button(SW01V)
During Vacuuming,
Valves & EEV should
be opened
Refer Service manual
68 Outdoor Unit
Electrical Wiring
2. Settings of slave outdoor unit
3. Settings of corresponding outdoor unit
SW01B Setting
Slave 1
Slave 1
1234567ON1234567
1234567ON1234567
1234567 891011121314
1234567 891011121314
Slave 2
Slave 2
1234567ON1234567
1234567ON1234567
1234567 891011121314
1234567 891011121314
Slave 3
Slave 3
1234567ON1234567
1234567ON1234567
1234567 891011121314
1234567 891011121314
SW01B Setting
SW01B Setting
Inv Back Up
Inv Back Up
1234567ON1234567
1234567ON1234567
1234567 891011121314
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
RemarksSW02B SettingFunction SW01B Setting
RemarksSW02B SettingFunction
RemarksSW02B SettingFunction
RemarksSW02B SettingFunction
Unit Back Up
Unit Back Up
1234567ON1234567
1234567ON1234567
1234567 891011121314
1234567 891011121314
ENGLISH
Installation Manual 69
Electrical Wiring
Automatic Addressing
• The address of indoor units would be set by auto
addressing
1) Wait for 3 minutes after applying power supply
(master and sub outdoor unit, indoor unit).
2) Press the switch of the outdoor unit (SW02V) for 5
seconds.
3) A "88" is indicated on 7-segment LED of the out-
door unit PCB.
4) For completing addressing, 2~7 minutes are
required depending on numbers of indoor unit connection set.
5) Numbers of indoor unit connection set whose
addressing is completed are indicated for 30seconds on 7-segment LED of the outdoor unit PCB.
6) After completing addressing, address of each
indoor unit is indicated on the wired remote control
display window. (CH01, CH02, CH03, .............
CH06: Indicated as numbers of indoor unit connection set.)
SW01B
(DIP S/W)
SW02B
(DIP S/W)
7 - Segment
SW02V
Auto addressing
SW01V
Data confirm
CAUTION
- In replacement of the indoor unit PCB, always perform auto address setting again.
If power supply is not applied to the indoor unit, operation error occurs.
Auto addressing is only possible on the main PCB
Auto addressing has to be performed after 3 minutes to improve communication.
◆ The Procedure of Automatic Addressing
• Auto addressing setting end
Numbers of indoor unit connection set whose
addressing is completed are indicated for 30seconds
on 7-segment LED after completing setting
Indoor address number is displayed on wired remote control or
indoor unit display window. It is not an error message, will
disappeared when on/off button is pressed on remote control
ex) Display of 01, 02, ..., 15 means connection of 15 indoor
units and auto addressing is completed normally.
Auto addressing start
Waiting 3 minutes
Power On
Press SW02V for 5 sec.
7-segment LED = 88
Don't Press SW02V
Waiting about 2~7 minutes
7-segment LED
OK
YES
NO Check the connections
of communication line
= 88
70 Outdoor Unit
Electrical Wiring
Group Number setting
Group Number setting for Indoor Units
Confirm the power of whole system(Indoor Unit, Outdoor Unit) is OFF, otherwise turn off.
The communication lines connected to INTERNET terminal should be connected to central control of Outdoor
unti with care for their polarity( A → A, B → B )
Turn the whole system on.
Set the group and Indoor Unit number with a wired remote control.
To control several sets of Indoor Units into a group, set the group ID from 0 to F for this purpose.
Terminal block on the main PCB
SODU IDU INTERNET DRY1 DRY2
B
A
B(D) A(C)
GND 12V
B
A
BA
Group recognizing the simple central controller
No.0 group (00~0F)
No.1 group (10~1F)
No.2 group (20~2F)
No.3 group (30~3F)
No.4 group (40~4F)
No.5 group (50~5F)
No.6 group (60~6F)
No.7 group (70~7F)
No.8 group (80~8F)
No.9 group (90~9F)
No. A group (A0~AF)
No. B group (B0~BF)
No. C group (C0~CF)
No. D group (D0~DF)
No. E group (E0~EF)
No. F group (F0~FF)
Outdoor Units
ENGLISH
Installation Manual 71
Electrical Wiring
Outdoor unit Dry Contact installation and connection
• Connect wires as below figure at the hole of backside of Outdoor Unit Dry Contact.
• Insert the wire in the connection hole pushing the "Push" button.
• Setting Main PCB Dip SW of Master Outdoor Unit.
Mode Change
Push Button
Heating
Outdoor Unit
Fan
Cooling
72 Outdoor Unit
Test Run
Test Run
1
2
3
4
Check to see whether there is any refrigerant leakage, and slack of power or communication cable.
Confirm that 500 V megger shows 2 MΩ or more between power supply terminal block and ground. Do
not operate in the case of 2 MΩ or less.
NOTE: Never carry out megaohm check over terminal control board. Otherwise the control board
would be broken.
Immediately after mounting the unit or after leaving it turned off for an extended length of time,
the resistance of the insulation between the power supply terminal board and the ground may
decrease to approx. 2 MΩ as a result of refrigerant accumulating in the internal compressor.
If the insulation resistance is less than 2 MΩ, turning on the main power supply and energizing
the crankcase heater for more than 6 hours will cause the refrigerant to evaporate, increasing
the insulation resistance.
Check if high/low pressure common pipe, liquid pipe and gas pipe valves are fully opened.
NOTE: Be sure to tighten caps.
Check if there are any problems in automatic addressing or not:
Check and confirm that there are no error messages in the display of indoor units or remote controls
and LED in outdoor units.
Checks Before Test Run
CAUTION
when cutting main power of the Multi V
• Always apply main power of the outdoor unit during use of product
(cooling season/heating season).
• Always apply power 6 hours in advance to heat the crank case heater where performing test run
after installation of product. It may result in burning out of the compressor if not preheating the
crank case with the electrical heater for more than 6 hours.(In case of the outdoor temperatue
below 10°C)
ENGLISH
Installation Manual 73
Test Run
How to Cope with Test Run Abnormality
The phenomena from main component failure
When system fault occurs, the error code is displayed at indoor unit display or remote control display,
the trouble shooting guide is in the service manual
Compressor
Outdoor
fan
Outdoor
EEV
Not operating
Stop during running
Abnormal noise
during running
High pressure error
at cooling
Heating failure, frequent defrosting
No operating sound
at applying power
Heating failure,
frozen outdoor heat
exchanger part
Low pressure error
or discharge temperature error
Motor insulation broken
Strainer clogged
Oil leakage
Motor insulation failure
R-S-T misconnection
Motor failure,
bad ventilation around
outdoor heat exchanger
Bad connector contact
Coil failure
EEV clogged
EEV clogged
Check resistance between terminals and
chassis
Change strainer
Check oil amount after opening oil port
Check resistance between terminals and
chassis
Check compressor R-S-T connection
Check the outdoor fan operation after being
turned the outdoor units off for some time.
Remove obstacles around the outdoor units
Check connector
Check resistance between terminals
Service necessary
Service necessary
Component Phenomenon Cause Check method and Trouble shooting
74 Outdoor Unit
Test Run
Sensor Checking Function
Sensor checking function judges whether the current temperature of indoor and outdoor unit sensors is right
or not. -3 indoor temperature sensors, 9 outdoor temperature sensors, 2 outdoor pressure sensors.
It is used for judging sensor abnormality.
Note 2)
Note 1)
Start
Main PCB
SW01S
Main PCB
SW01B
SW02B
Wait for 3 min. after power
reset
Set the dip S/W according to the function
Sensor Checking ➠ Refrigerant Auto Charging : 1,2,7 ON
Sensor Checking ➠ Refrigerant Checking : 1,2,7,14 ON
Would you perform
the Sensor
checking?
Note
1. Sensor checking function is used with Refrigerant
Checking and Refrigerant Auto Charging.
2. Check abnormal sensor
3.
It is displayed at the LED on the main PCB at each step.
4. Refer to the next page for sensor error code part
Caution
1. Confirm auto addressing has been performed (Check
installed number of IDU).
2. The error can be displayed even if the sensor is
normal according to installation and temperature
condition. If error occurs, check the sensor and
judge abnormality.
Don’t Perform Sensor Checking
No
Main PCB
SW01V
Main pcb
LED
Main PCB
SW01V
Yes
Press the black button for 2 sec. on main PCB.
Indoor/Outdoor units operate with
air circulation mode
Judging sensor
normality
No
Error Display
Press the black button on the main PCB for 2 sec.
Press the black button for 2 sec. after turning off all
of dip S/W.
Completed.
Note 3)
Yes
Note 4)
Refrigerant Auto Charging
Press the black button
until '508' is displayed
Refrigerant
Auto Charging
Refrigerant Checking
Press the black button
until '608' is displayed.
Refrigerant
Checking
ENGLISH
Installation Manual 75
Test Run
Sensor Check Error Code Display
In case error occurs during sensor checking process, error display is as shown below.
Following contents are displayed one after the other on the main PCB of master outdoor unit.
Indoor sensor error :
319
Outdoor sensor error :
309
Displaying error content
* 5 number of errors is displayed
continuously and repeatedly.
Displaying error content
■ Indoor unit error display
1.1st and 2nd number represents indoor unit number.
2. Last number represents sensor.
1: Pipe inlet temperature sensor
2: Pipe outlet temperature sensor
3: Air temperature sensor
■ Displaying outdoor unit error
1.1st and 2nd number represents error content(code).
2.Last number represents outdoor unit number.
1 : Master
2 : Slave 1
3 : Slave 2
4 : Slave 3
* Indoor unit number follows auto addressing number.
(To check the LGMV Data)
ex) Indoor unit No. 2 Pipe inlet temperature sensor
error
ex) Outdoor Master Unit Liquid pipe temperature
sensor error
1 Outdoor Air Temperature
2 Heat Exchanger 1(Front side)
3 Heat Exchanger 2(Rear side)
4 Inverter Comp. Discharge Temperature
5 Const. Speed. Comp. Discharge Temperature
6 Suction Temperature
7 Liquid Pipe Temperature
8 SC pipe in
9 SC pipe out
10 High Pressure Sensor
11 Low Pressure Sensor
ex) IDU No.2 Pipe inlet temperature sensor error and Master
ODU suction temperature sensor, Slave 3 high pressure
sensor error
Caution
1. Up to 5 number of errors is displayed continuously and
repeatedly. In case 5 error occurs, again perform sensor
checking after solving errors.
2. IDU in which error occurred operates air circulation mode.
.......
Test Run
76 Outdoor Unit
Refrigerant Auto Charging Function
This function charges appropriate amount of refrigerant automatically through cycle operation.
It can be used when refrigerant amount Isn't certain because of SVC and leakage.
Main PCB
SW01S
Main PCB
SW01B
SW02B
Main PCB
SW01V
Main PCB
SW01V
Start
Wait for 3 min. after power reset
Set the Dip S/W.
Refrigerant Auto Changing : 1,2,7 ON
Press the black button on main PCB.
( Press until ‘508’ is displayed )
Press the black button on main PCB.
IDU runs with cooling mode In designated order.
Is it necessary to
charge refrigerant?
No
Note
1. After installing the refrigerant charging
2. In case air temperature is out of guaranteed
3.
(Refrigerant Charging Time : about 3 min/kg)
Yes
device as shown below in figure,
open the valve.
temperature, it may end without performing
auto charging.
Refrigerant Charging Time may change
according to the charging amount.
*1)
Press the black button
Refrigerant Auto
Charging Process
IDU and ODU are turned off when Auto Charging
is completed. Close the valve.
Main PCB
SW01V
Press the black button
Press the black button for 2 sec. after turning off
all of dip S/W.
*2)
Completed.
Test Run
ENGLISH
Installation Manual 77
manifold
CAUTION
1. Guaranteed temperature range (Error will occur if temperature is out of range)
IDU : 20°C ~ 32°C
ODU : 0°C ~ 43°C
2. For refrigerant charging, use designated device only. (Capillary Assem Set)
3. Set the IDU wired remote controller temperature sensing mode as IDU
4. Be careful that IDU should not be thermo off.
■ Error contents about auto refrigerant charging function
1. : Temperature Range Error (In case that IDU or ODU is out of range)
2. : Low Pressure Descent Error (In case the system runs at low pressure limit for over 10 minutes)
3. : Judging rapid refrigerant inflow ( In case the liquid refrigerant flows in because of not using designated Capillary Assembly)
4. : Instability Error( In case the high/low pressure target doesn't get satisfied for some time
after the starting operation)
Liquid Pipe
Gas Pipe
Procedure
1. Arrange manifold,capillary assembly, refrigerant vessel and scale
2. Connect manifold to the gas pipe service valve of ODU as shown in the figure.
3. Connect manifold and Capillary tube.
Use designated capillary assembly only.
If designated capillary assembly isn't used, the system may get damaged.
4. Connect capillary and refrigerant vessel.
5. Purge hose and manifold.
6. After Is displayed, open the valve and charge the refrigerant
78 Outdoor Unit78 Outdoor Unit
Test Run
1. This function charges appropriate amount of refrigerant automatically through cycle operation.
2. This function judges refrigerant leakage and overcharging.
3. It can be used with refrigerant auto charging function.
Refrigerant Checking Function
Main
PCB
SW01S
Main
PCB
SW01B
SW02B
Main
PCB
SW01V
Main
PCB
SW01V
Start
Wait for 3 min. after power reset
Set the Dip S/W.
Refrigerant Checking : 1,2,7,14 ON
Press the black button on main PCB.
( Press until ‘608’ is displayed )
Press the black button on main PCB
IDU runs with cooling mode in order.
Judging
Refrigerant
Amount
Excess of
Refrigerant
Scarcity of
Refrigerant
Note
1. In case air temperature is out of guaranteed
temperature, refrigerant checking function may end
without performing refrigerant checking. Use
guaranteed temperature range only.
2. During the process of judging refrigerant amount, if
the cycle isn't stable, refrigerant checking function
may end without performing refrigerant checking.
Impossible
To Judge
IDU, ODU are turned off
Main
Press the black button on main PCB
PCB
SW01V
Press the black button for 2 sec. after
turning off all of dip S/W.
Completed
Note
Note 1)
ENGLISH
Installation Manual 79
Test Run
[ Error contents about auto refrigerant charging function ]
1. : Temperature Range Error (In case that IDU or ODU is out of range)
2. : System Unstable Error (In case, After 45 min operating the system, it does not be stable)
How to Cope with Result of Refrigerant checking
1. If the temperature is not in guaranteed Temperature range, the system will not execute Refrigerant checking and the system will be OFF.
2. Excess of Refrigerant(619)
After remove the 20% of calculated total refrigerant, recharge the refrigerant by using Refrigerant Auto
Charging Function.
3. Scarcity of Refrigerant(629)
Charge the refrigerant by using Refrigerant Auto Charging Function.
4. Impossible to Judge(639)
IF the system is not in order, check the other problem except refrigerant.
CAUTION
1. Guaranteed Temperature range(Error occurs out of guaranteed temperature range)
IDU : 20~32°C
ODU : 10~38°C
2. Set IDU wired remote controller temperature sensor setting as 'IDU'.
3. Make certain that IDU doesn't run with thermo off mode during operation.
80 Outdoor Unit80 Outdoor Unit
Test Run
In cooling mode, this function makes the ODU fan operate at low RPM to reduce the fan noise of ODU at
night which has low cooling load.
Night Low Noise Function
Max. RPM setting method
Dip S/W No.12+14 ON
Master ODU
SW01B
Main PCB Power Reset
Note 1)
Setting the Fan Max. RPM
Master ODU
SW01S
SW01V
SW02V
Setting Complete
Example of Max. RPM Setting
Fan Max. RPM : Step 1
- Night silent operation start
➞ 8 hours after max. ODU temp. sensing, the fan max. RPM is operated setting RPM.
- Night silent operation end
➞ 9 hours after Night silent operation is started, the function should be stopped automatically.
CAUTION
1. Request installer to set the function during installation.
2. In case the function is not used, set the dip S/W OFF and reset the power.
3. If ODU RPM changes, cooling capacity may go down.
[Note]
1. Select appropriate RPM referencing noise table.
Step
Setting
Red buttonBlack button
1 time
1 time
1 time
1 time
1 time
1 time
1 time
1 time
1 time 1254009 times9
Fan Max
RPM
Judgment
(hr)
85101 time1
6.55102 times2
55103 times3
84504 times4
6.54505 times5
54506 times6
84007 times7
6.54008 times8
Operation
(hr)
9
10.5
12
9
10.5
12
9
10.5
ENGLISH
Installation Manual 81
Test Run
This function is used for creating vacuum in the system after compressor replacement, ODU parts replacement or IDU addition/replacement.
This function secures the air flow rate of ODU, in case static pressure has been applied like using duct at fan
discharge of ODU.
■ Static pressure compensation dip S/W setting method
High static pressure mode (Max. RPM 930) : Master ODU Main PCB SW02B NO.13 Dip S/W
Low static pressure mode (Max. RPM 900) : Master ODU Main PCB SW02B NO.12 Dip S/W
Vacuum Mode
Static pressure compensation mode
Vacuum mode setting method Vacuum mode cancellation method
Main PCB
SW01S
Main PCB
SW02B
Main PCB
SW01V
Master main PCB DIP switch ON ( No.11,14)
Press the black button Main PCB (5 sec.)
Caution
ODU operation stops during vacuum mode. Compressor can't operate.
ODU power reset
Vacuum mode setting
ODU V/V OPEN
Main EEV, SC EEV OPEN
IDU EEV OPEN
Master main PCB DIP switch OFF( No.11,14)
Power reset
Vacuum mode cancellation
Static pressure compensation mode setting
Static pressure compensation mode is set
method
DIP switch setting
High static pressure:No. 13
Low static pressure:No.12
Power Reset
Static pressure compensation mode cancellation
method
DIP switch OFF
Power Reset
Static pressure compensation mode is cancelled
82 Outdoor Unit82 Outdoor Unit
Test Run
Self-Diagnosis Function
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 LED of 7-segment indicates error number, 3rd LED indicates unit number.
Ex) 211 : No.21 error of master unit
213 : No.21 error of slave2
011 → 051 : No.105 error of master unit
Display Title Cause of Error
0102-
03-
04-
05-
06-
07-
09-
10-
11-
1
2
21
3
4
1
2
22
3
4
Air temperature sensor of indoor unit
Inlet pipe temperature sensor of indoor unit
Communication error : wired
remote controller ↔ indoor unit
Drain pump
Communication error : outdoor
unit ↔ indoor unit
Outlet pipe temperature sensor of
indoor unit
Different operation mode
Indoor EEPROM Error
Poor fan motor operation
Communication error: indoor unit
→ main PCB of outdoor.
Master Outdoor Unit Inverter
Compressor IPM Fault
Slave1 Outdoor Unit Inverter
Compressor IPM Fault
Slave2 Outdoor Unit Inverter
Compressor IPM Fault
Slave3 Outdoor Unit Inverter
Compressor IPM Fault
Inverter Board Input Over
Current(RMS) of Master Outdoor
Unit
Inverter Board Input Over
Current(RMS) of Slave1 Outdoor
Unit
Inverter Board Input Over
Current(RMS) of Slave2 Outdoor
Unit
Inverter Board Input Over
Current(RMS) of Slave3 Outdoor
Unit
Air temperature sensor of indoor unit is open or short
Inlet pipe temperature sensor of indoor unit is open or short
Failing to receive wired remote controller signal in
indoor unit PCB
Malfunction of drain pump
Failing to receive outdoor unit signal in indoor unit PCB
Outlet pipe temperature sensor of indoor unit is
open or short
Operation mode between indoor unit and outdoor unit
is different
In case when the serial number marked on
EEPROM of Indoor unit is 0 or FFFFFF
Disconnecting the fan motor connector/Failure of indoor fan
motor lock
PCB damage
Master Outdoor Unit Inverter Compressor Drive IPM Fault
Slave1 Outdoor Unit Inverter Compressor Drive IPM Fault
Slave2 Outdoor Unit Inverter Compressor Drive IPM Fault
Slave3 Outdoor Unit Inverter Compressor Drive IPM Fault
Master Outdoor Unit Inverter Board Input Current
excess (RMS)
Slave1 Outdoor Unit Inverter Board Input Current
excess (RMS)
Slave2 Outdoor Unit Inverter Board Input Current
excess (RMS)
Slave3 Outdoor Unit Inverter Board Input Current
excess (RMS)
Indoor unit related error
Outdoor unit related error
ENGLISH
Installation Manual 83
Test Run
DC charging is not performed at Master Outdoor Unit
after starting relay turn on.
DC charging is not performed at Slave1 Outdoor Unit
after starting relay turn on.
DC charging is not performed at Slave2 Outdoor Unit
after starting relay turn on.
DC charging is not performed at Slave3 Outdoor Unit
after starting relay turn on.
System is turned off by Master Outdoor Unit high pressure switch.
System is turned off by slave1 Outdoor Unit high pressure switch.
System is turned off by slave2 Outdoor Unit high pressure switch.
System is turned off by slave3 Outdoor Unit high pressure switch.
Master Outdoor Unit input voltage is over 487V or
below 270V
Slave1 Outdoor Unit input voltage is over 487V or
below 270V
Slave2 Outdoor Unit input voltage is over 487V or
below 270V
Slave3 Outdoor Unit input voltage is over 487V or
below 270V
The First Start Failure by Master Outdoor Unit Inverter
Compressor Abnormality
The First Start Failure by Slave1 Outdoor Unit Inverter
Compressor Abnormality
The First Start Failure by Slave2 Outdoor Unit Inverter
Compressor Abnormality
The First Start Failure by Slave3 Outdoor Unit Inverter
Compressor Abnormality
System is turned off by Master Outdoor Unit DC
Voltage Over Charging
System is turned off by Slave1 Outdoor Unit DC
Voltage Over Charging
System is turned off by Slave2 Outdoor Unit DC
Voltage Over Charging
System is turned off by Slave3 Outdoor Unit DC
Voltage Over Charging
Master Outdoor Unit Inverter Compressor Fault OR
Drive Fault
Slave1 Outdoor Unit Inverter Compressor Fault OR
Drive Fault
Slave2 Outdoor Unit Inverter Compressor Fault OR
Drive Fault
Slave3 Outdoor Unit Inverter Compressor Fault OR
Drive Fault
Master Outdoor Unit Inverter
Compressor DC link Low Voltage
Slave1 Outdoor Unit Inverter
Compressor DC link Low Voltage
Slave2 Outdoor Unit Inverter
Compressor DC link Low Voltage
Slave3 Outdoor Unit Inverter
Compressor DC link Low Voltage
Master Outdoor Unit High
Pressure Switch
Slave1 Outdoor Unit High
Pressure Switch
Slave2 Outdoor Unit High
Pressure Switch
Slave3 Outdoor Unit High
Pressure Switch
Master Outdoor Unit Input Voltage
High/ Low Voltage
Slave1 Outdoor Unit Input Voltage
High/ Low Voltage
Slave2 Outdoor Unit Input Voltage
High/ Low Voltage
Slave3 Outdoor Unit Input Voltage
High/ Low Voltage
Master Outdoor Unit Inverter
Compressor Start Failure
Slave1 Outdoor Unit Inverter
Compressor Start Failure
Slave2 Outdoor Unit Inverter
Compressor Start Failure
Slave3 Outdoor Unit Inverter
Compressor Start Failure
Master Outdoor Unit Inverter DC
link High Voltage
Slave1 Outdoor Unit Inverter DC
link High Voltage
Slave2 Outdoor Unit Inverter DC
link High Voltage
Slave3 Outdoor Unit Inverter DC
link High Voltage
Master Outdoor Unit Inverter
Compressor Over Current
Slave1 Outdoor Unit Inverter
Compressor Over Current
Slave2 Outdoor Unit Inverter
Compressor Over Current
Slave3 Outdoor Unit Inverter
Compressor Over Current
Display Title Cause of Error
1
2
23
3
4
1
2
24
3
4
1
2
25
3
4
1
2
26
3
4
1
2
28
3
4
1
2
29
3
4
Outdoor unit related error
84 Outdoor Unit84 Outdoor Unit
Test Run
System is turned off by excessive increase of high
pressure of Master Outdoor Unit
System is turned off by excessive increase of high
pressure of Slave1 Outdoor Unit
System is turned off by excessive increase of high
pressure of Slave2 Outdoor Unit
System is turned off by excessive increase of high
pressure of Slave3 Outdoor Unit
System is turned off by excessive decrease of low
pressure of Master Outdoor Unit
System is turned off by excessive decrease of low
pressure of Slave1 Outdoor Unit
System is turned off by excessive decrease of low
pressure of Slave2 Outdoor Unit
System is turned off by excessive decrease of low
pressure of Slave3 Outdoor Unit
High Pressure of Master Outdoor
Unit
High Pressure of Slave1 Outdoor
Unit
High Pressure of Slave2 Outdoor
Unit
High Pressure of Slave3 Outdoor
Unit
Low Pressure of Master Outdoor
Unit
Low Pressure of Slave1 Outdoor
Unit
Low Pressure of Slave2 Outdoor
Unit
Low Pressure of Slave3 Outdoor
Unit
1
2
34
3
4
1
2
35
3
4
System is turned off by Master Outdoor Unit Inverter
Compressor High Discharge Temperature
System is turned off by Slave1 Outdoor Unit Inverter
Compressor High Discharge Temperature
System is turned off by Slave2 Outdoor Unit Inverter
Compressor High Discharge Temperature
System is turned off by Slave3 Outdoor Unit Inverter
Compressor High Discharge Temperature
System is turned off by Master Outdoor Uunit Constant
Speed High Discharge Temperature
System is turned off by Slave1 Outdoor Unit Constant
Speed High Discharge Temperature
System is turned off by Slave2 Outdoor Unit Constant
Speed High Discharge Temperature
System is turned off by Slave3 Outdoor Unit Constant
Speed High Discharge Temperature
Master Outdoor Unit Inverter
Compressor High Discharge
Temperature
Slave1 Outdoor Unit Inverter
Compressor High Discharge
Temperature
Slave2 Outdoor Unit Inverter
Compressor Discharge High
Temperature
Slave3 Outdoor Unit Inverter
Compressor High Discharge
Temperature
Master Outdoor Unit Constant
Speed Compressor High
Discharge Temperature
Slave1 Outdoor Unit Constant
Speed Compressor High
Discharge Temperature
Slave2 Outdoor Unit Constant
Speed Compressor High
Discharge Temperature
Slave3 Outdoor Unit Constant
Speed Compressor High
Discharge Temperature
Display Title Cause of Error
1
2
32
3
4
1
2
33
3
4
Outdoor unit related error
ENGLISH
Installation Manual 85
Test Run
Master Outdoor Unit Inverter Compressor CT Sensor
open or short
Slave1 Outdoor Unit Inverter Compressor CT Sensor
open or short
Slave2 Outdoor Unit Inverter Compressor CT Sensor
open or short
Slave3 Outdoor Unit Inverter Compressor CT Sensor
open or short
Master Outdoor Unit Inverter
Compressor CT Sensor Fault
Slave1 Outdoor Unit Inverter
Compressor CT Sensor Fault
Slave2 Outdoor Unit Inverter
Compressor CT Sensor Fault
Slave3 Outdoor Unit Inverter
Compressor CT Sensor Fault
Display Title Cause of Error
Outdoor unit related error
Master Outdoor Unit Inverter Compressor Discharge
Temperature Sensor open or short
Slave1 Outdoor Unit Inverter Compressor Discharge
Temperature Sensor open or short
Slave2 Outdoor Unit Inverter Compressor Discharge
Temperature Sensor open or short
Slave3 Outdoor Unit Inverter Compressor Discharge
Temperature Sensor open or short
Master Outdoor Unit Low Pressure Sensor open or
short
Slave1 Outdoor Unit Low Pressure Sensor open or
short
Slave2 Outdoor Unit Low Pressure Sensor open or
short
Slave3 Outdoor Unit Low Pressure Sensor open or
short
Master Outdoor Unit High Pressure Sensor open or
short
Slave1 Outdoor Unit High Pressure Sensor open or
short
Slave2 Outdoor Unit High Pressure Sensor open or
short
Slave3 Outdoor Unit High Pressure Sensor open or
short
Master Outdoor Unit Air Temperature Sensor open or
short
Slave1 Outdoor Unit Air Temperature Sensor open or
short
Slave2 Outdoor Unit Air Temperature Sensor open or
short
Slave3 Outdoor Unit Air Temperature Sensor open or
short
Master Outdoor Unit Inverter
Compressor Discharge
Temperature Sensor Fault
Slave1 Outdoor Unit Inverter
Compressor Discharge
Temperature Sensor Fault
Slave2 Outdoor Unit Inverter
Compressor Discharge
Temperature Sensor Fault
Slave3 Outdoor Unit Inverter
Compressor Discharge
Temperature Sensor Fault
Master Outdoor Unit Low Pressure
Sensor Fault
Slave1 Outdoor Unit Low Pressure
Sensor Fault
Slave2 Outdoor Unit Low Pressure
Sensor Fault
Slave3 Outdoor Unit Low Pressure
Sensor Fault
Master Outdoor Unit High
Pressure Sensor Fault
Slave1 Outdoor Unit High
Pressure Sensor Fault
Slave2 Outdoor Unit High
Pressure Sensor Fault
Slave3 Outdoor Unit High
Pressure Sensor Fault
Master Outdoor Unit Air
Temperature Sensor Fault
Slave1 Outdoor Unit Air
Temperature Sensor Fault
Slave2 Outdoor Unit Air
Temperature Sensor Fault
Slave3 Outdoor Unit Air
Temperature Sensor Fault
1
2
41
3
4
1
2
42
3
4
1
2
43
3
4
1
2
44
3
4
1
2
403
4
86 Outdoor Unit86 Outdoor Unit
Test Run
Master Outdoor Unit Heat Exchanger Temperature
Sensor(Front side) open or short
Slave1 Outdoor Unit Heat Exchanger Temperature
Sensor (Front side) open or short
Slave2 Outdoor Unit Heat Exchanger Temperature
Sensor(Front side) open or short
Slave3 Outdoor Unit Heat Exchanger Temperature
Sensor(Front side) open or short
Master Outdoor Unit Suction Temperature Sensor
open or short
Slave1 Outdoor Unit Suction Temperature Sensor
open or short
Slave2 Outdoor Unit Suction Temperature Sensor
open or short
Slave3 Outdoor Unit Suction Temperature Sensor
open or short
Master Outdoor Unit Constant Speed Compressor
Discharge Temperature Sensor open or short
Slave1 Outdoor Unit Constant Speed Compressor
Discharge Temperature Sensor open or short
Slave2 Outdoor Unit Constant Speed Compressor
Discharge Temperature Sensor open or short
Slave3 Outdoor Unit Constant Speed Compressor
Discharge Temperature Sensor open or short
Master Outdoor Unit Heat Exchanger Temperature
Sensor (Rear side) open or short
Slave1 Outdoor Unit Heat Exchanger Temperature
Sensor (Rear side) open or short
Slave2 Outdoor Unit Heat Exchanger Temperature
Sensor (Rear side) open or short
Slave3 Outdoor Unit Heat Exchanger Temperature
Sensor (Rear side) open or short
Master Outdoor Unit Heat
Exchanger Temperature Sensor
(Front side) Fault
Slave1 Outdoor Unit Heat
Exchanger Temperature Sensor
(Front side) Fault
Slave2 Outdoor Unit Heat
Exchanger Temperature Sensor
(Front side) Fault
Slave3 Outdoor Unit Heat
Exchanger Temperature Sensor
(Front side) Fault
Master Outdoor Unit Suction
Temperature Sensor Fault
Slave1 Outdoor Unit Suction
Temperature Sensor Fault
Slave2 Outdoor Unit Suction
Temperature Sensor Fault
Slave3 Outdoor Unit Suction
Temperature Sensor Fault
Master Outdoor Unit Constant
Speed Compressor Discharge
Temperature Sensor Fault
Slave1 Outdoor Unit Constant
Speed Compressor Discharge
Temperature Sensor Fault
Slave2 Outdoor Unit Constant
Speed Compressor Discharge
Temperature Sensor Fault
Slave3 Outdoor Unit Constant
Speed Compressor Discharge
Temperature Sensor Fault
Master Outdoor Unit Heat
Exchanger Temperature Sensor
(Rear side) Fault
Slave1 Outdoor Unit Heat
Exchanger Temperature Sensor
(Rear side) Fault
Slave2 Outdoor Unit Heat
Exchanger Temperature Sensor
(Rear side) Fault
Slave3 Outdoor Unit Heat
Exchanger Temperature Sensor
(Rear side) Fault
Display Title Cause of Error
1
2
45
3
4
1
2
46
3
4
1
2
47
3
4
1
2
48
3
4
Outdoor unit related error
ENGLISH
Installation Manual 87
Test Run
Omitting connection of Master outdoor unit
Omitting connection of Slave1 Outdoor Unit
Omitting connection of Slave2 Outdoor Unit
Omitting connection of Slave3 Outdoor Unit
Excessive connection of indoor units compared to
capacity of Outdoor Unit
Failing to receive inverter signal at main PCB of Master
Outdoor Unit
Failing to receive inverter signal at main PCB of Slave1
Outdoor Unit
Failing to receive inverter signal at main PCB of Slave2
Outdoor Unit
Failing to receive inverter signal at main PCB of Slave3
Outdoor Unit
Failing to receive indoor unit signal at main PCB of
Outdoor Unit .
Reverse connection or omitting connection of R, S, T
power of Master Outdoor Unit
Reverse connection or omitting connection of R, S, T
power of Slave1 Outdoor Unit
Reverse connection or omitting connection of R, S, T
power of Slave2 Outdoor Unit
Reverse connection or omitting connection of R, S, T
power of Slave3 Outdoor Unit
Mixing Installation of Old Sub Outdoor Unit and New
Slave Outdoor Unit
Access Error of Inverter PCB of Master Outdoor Unit
Access Error of Inverter PCB of Slave1 Outdoor Unit
Access Error of Inverter PCB of Slave2 Outdoor Unit
Access Error of Inverter PCB of Slave3 Outdoor Unit
Restriction of Master Outdoor Unit
Restriction of Slave1 Outdoor Unit
Restriction of Slave2 Outdoor Unit
Restriction of Slave3 Outdoor Unit
Omitting connection of R, S, T
power of Master Outdoor Unit
Omitting connection of R, S, T
power of Slave1 Outdoor Unit
Omitting connection of R, S, T
power of Slave2 Outdoor Unit
Omitting connection of R, S, T
power of Slave3 Outdoor Unit
Excessive capacity of indoor units
Communication error : inverter
PCB → Main PCB
Communication error : inverter
PCB → Main PCB
Communication error : inverter
PCB → Main PCB
Communication error : inverter
PCB → Main PCB
Communication error : indoor unit
→ main PCB of Outdoor Unit
Reverse connection of R, S, T
power of Master Outdoor Unit
Reverse connection of R, S, T
power of Slave1 Outdoor Unit
Reverse connection of R, S, T
power of Slave2 Outdoor Unit
Reverse connection of R, S, T
power of Slave3 Outdoor Unit
Mixing Installation of Sub Outdoor
Unit
Inverter PCB EEPROM Error of
Master Outdoor Unit
Inverter PCB EEPROM Error of
Slave1 Unit
Inverter PCB EEPROM Error of
Slave2 Unit
Inverter PCB EEPROM Error of
Slave3 Unit
Master Outdoor Unit Fan Lock
Slave1 Outdoor Unit Fan Lock
Slave2 Outdoor Unit Fan Lock
Slave3 Outdoor Unit Fan Lock
Display Title Cause of Error
1
2
50
3
4
511
1
2
52
3
4
531
1
2
54
3
4
591
1
2
60
3
4
1
67
2
3
4
Outdoor unit related error
88 Outdoor Unit88 Outdoor Unit
Test Run
Constant CT Sensor open or short of Master Outdoor
Unit
Constant CT Sensor open or short of Slave1 Outdoor
Unit
Constant CT Sensor open or short of Slave2 Outdoor
Unit
Constant CT Sensor open or short of Slave3 Outdoor
Unit
Master Outdoor Unit PFC CT Sensor open or short
Slave1 Outdoor Unit PFC CT Sensor open or short
Slave2 Outdoor Unit PFC CT Sensor open or short
Slave3 Outdoor Unit PFC CT Sensor open or short
Instant Over Current(Peak) of Master Outdoor Unit
PFC
Instant Over Current(Peak) of Slave1 Outdoor Unit
PFC
Instant Over Current(Peak) of Slave2 Outdoor Unit
PFC
Instant Over Current(Peak) of Slave3 Outdoor Unit
PFC
Master Outdoor Unit R-T Phase Difference is over 5A
Slave1 Outdoor Unit R-T Phase Difference is over 5A
Slave2 Outdoor Unit R-T Phase Difference is over 5A
Slave3 Outdoor Unit R-T Phase Difference is over 5A
Master Outdoor Unit Fan CT Sensor open or short
Slave1 Outdoor Unit Fan CT Sensor open or short
Slave2 Outdoor Unit Fan CT Sensor open or short
Slave3 Outdoor Unit Fan CT Sensor open or short
Master Outdoor Unit Fan DC Link High Voltage Error
Slave1 Outdoor Unit Fan DC Link High Voltage Error
Slave2 Outdoor Unit Fan DC Link High Voltage Error
Slave3 Outdoor Unit Fan DC Link High Voltage Error
Constant CT Sensor Error of
Master Outdoor Unit
Constant CT Sensor Error of
Slave1 Outdoor Unit
Constant CT Sensor Error of
Slave2 Outdoor Unit
Constant CT Sensor Error of
Slave3 Outdoor Unit
PFC CT Sensor Error of Master
Outdoor Unit
PFC CT Sensor Error of Slave1
Outdoor Unit
PFC CT Sensor Error of Slave2
Outdoor Unit
PFC CT Sensor Error of Slave3
Outdoor Unit
Instant Over Current(Peak) of
Master Outdoor Unit PFC
Instant Over Current(Peak) of
Slave1 Outdoor Unit PFC
Instant Over Current(Peak) of
Slave2 Outdoor Unit PFC
Instant Over Current(Peak) of
Slave3 Outdoor Unit PFC
Master Outdoor Unit 3 Phase
Power unbalance
Slave1 Outdoor Unit 3 Phase
Power unbalance
Slave2 Outdoor Unit 3 Phase
Power unbalance
Slave3 Outdoor Unit 3 Phase
Power unbalance
Master Outdoor Unit Fan CT
Sensor Error
Slave1 Outdoor Unit Fan CT
Sensor Error
Slave2 Outdoor Unit Fan CT
Sensor Error
Slave3 Outdoor Unit Fan CT
Sensor Error
Master Outdoor Unit Fan DC Link
High Voltage Error
Slave1 Outdoor Unit Fan DC Link
High Voltage Error
Slave2 Outdoor Unit Fan DC Link
High Voltage Error
Slave3 Outdoor Unit Fan DC Link
High Voltage Error
Display Title Cause of Error
1
2
70
3
4
1
2
71
3
4
1
2
73
3
4
1
2
74
3
4
1
2
75
3
4
1
2
76
3
4
Outdoor unit related error
ENGLISH
Installation Manual 89
Test Run
Master Outdoor Unit Fan Current is over 5A
Slave1 Outdoor Unit Fan is over 5A
Slave2 Outdoor Unit Fan is over 5A
Slave3 Outdoor Unit Fan is over 5A
Master Outdoor Unit Fan Hall Sensor open or Short
Slave1 Outdoor Unit Fan Hall Sensor open or Short
Slave2 Outdoor Unit Fan Hall Sensor open or Short
Slave3 Outdoor Unit Fan Hall Sensor open or Short
Master Outdoor Unit Fan First Position Sensing Failure
Slave1 Outdoor Unit Fan First Position Sensing Failure
Slave2 Outdoor Unit Fan First Position Sensing Failure
Slave3 Outdoor Unit Fan First Position Sensing Failure
Communication Fail Between Master Outdoor Unit
Main MICOM and EEPROM or omitting EEPROM
Communication Fail Between Slave1 Outdoor Unit
Main MICOM and EEPROM or omitting EEPROM
Communication Fail Between Slave2 Outdoor Unit
Main MICOM and EEPROM or omitting EEPROM
Communication Fail Between Slave3 Outdoor Unit
Main MICOM and EEPROM or omitting EEPROM
Communication Fail Between Master Outdoor Unit Fan
MICOM and EEPROM or omitting EEPROM
Communication Fail Between Slave1 Outdoor Unit Fan
MICOM and EEPROM or omitting EEPROM
Communication Fail Between Slave2 Outdoor Unit Fan
MICOM and EEPROM or omitting EEPROM
Communication Fail Between Slave3 Outdoor Unit Fan
MICOM and EEPROM or omitting EEPROM
Master Outdoor Unit Fan Over
Current Error
Slave1 Outdoor Unit Fan Over
Current Error
Slave2 Outdoor Unit Fan Over
Current Error
Slave3 Outdoor Unit Fan Over
Current Error
Master Outdoor Unit Fan Hall
Sensor Error
Slave1 Outdoor Unit Fan Hall
Sensor Error
Slave2 Outdoor Unit Fan Hall
Sensor Error
Slave3 Outdoor Unit Fan Hall
Sensor Error
Master Outdoor Unit Fan Start
Failure Error
Slave1 Outdoor Unit Fan Start
Failure Error
Slave2 Outdoor Unit Fan Start
Failure Error
Slave3 Outdoor Unit Fan Start
Failure Error
Master Outdoor Unit Main PCB
EEPROM Error
Slave1 Outdoor Unit Main PCB
EEPROM Error
Slave2 Outdoor Unit Main PCB
EEPROM Error
Slave3 Outdoor Unit Main PCB
EEPROM Error
Master Outdoor Unit Fan PCB
EEPROM Error
Slave1 Outdoor Unit Fan PCB
EEPROM Error
Slave2 Outdoor Unit Fan PCB
EEPROM Error
Slave3 Outdoor Unit Fan PCB
EEPROM Error
Display Title Cause of Error
1
2
77
3
4
1
2
78
3
4
1
2
79
3
4
1
2
86
3
4
1
2
87
3
4
Outdoor unit related error
90 Outdoor Unit90 Outdoor Unit
Test Run
Failing to receive Slave Unit signal at main PCB of
Master Outdoor Unit
Failing to receive master and other Slave Unit signal at
main PCB of Slave1 Outdoor Unit
Failing to receive master and other Slave Unit signal at
main PCB of Slave2 Outdoor Unit
Failing to receive master and other Slave Unit signal at
main PCB of Slave3 Outdoor Unit
Communication Error Between
Master Outdoor Unit and Other
Outdoor Unit
Communication Error Between
Slave1 Outdoor Unit and Other
Outdoor Unit
Communication Error Between
Slave2 Outdoor Unit and Other
Outdoor Unit
Communication Error Between
Slave3 Outdoor Unit and Other
Outdoor Unit
Display Title Cause of Error
1
2
10 4
3
4
Outdoor unit related error
Failing to receive fan signal at main PCB of master
unit.
Failing to receive fan signal at main PCB of Slave1
unit.
Failing to receive fan signal at main PCB of Slave2
unit.
Failing to receive fan signal at main PCB of Slave3
unit.
Instant Over Current at Master Outdoor Unit Fan IPM
Instant Over Current at Slave1 Outdoor Unit Fan IPM
Instant Over Current at Slave2 Outdoor Unit Fan IPM
Instant Over Current at Slave3 Outdoor Unit Fan IPM
Master Outdoor Unit Fan DC Link Input Voltage is
under 380V
Slave1 Outdoor Unit Fan DC Link Input Voltage is
under 380V
Slave2 Outdoor Unit Fan DC Link Input Voltage is
under 380V
Slave3 Outdoor Uni Fan DC Link Input Voltage is
under 380V
Liquid pipe temperature sensor of Master Outdoor Unit
is open or short
Liquid pipe temperature sensor of slave1 Outdoor Unit
is open or short
Liquid pipe temperature sensor of slave2 Outdoor Unit
is open or short
Liquid pipe temperature sensor of slave3 Outdoor Unit
is open or short
Master Outdoor Unit Fan PCB
Communication Error
Slave1 Outdoor Unit Fan PCB
Communication Error
Slave2 Outdoor Unit Fan PCB
Communication Error
Slave3 Outdoor Unit Fan PCB
Communication Error
Master Outdoor Unit FAN IPM
Fault Error
Slave1 Outdoor Unit FAN IPM
Fault Error
Slave2 Outdoor Unit FAN IPM
Fault Error
Slave3 Outdoor Unit FAN IPM
Fault Error
Master Outdoor Unit Fan DC Link
Low Voltage Error
Slave1 Outdoor Unit Fan DC Link
Low Voltage Error
Slave2 Outdoor Unit Fan DC Link
Low Voltage Error
Slave3 Outdoor Unit Fan DC Link
Low Voltage Error
Master Outdoor Unit Liquid pipe
Temperature Sensor Error
Slave1 Outdoor Unit Liquid pipe
Temperature Sensor Error
Slave2 Outdoor Unit Liquid pipe
Temperature Sensor Error
Slave3 Outdoor Unit Liquid pipe
Temperature Sensor Error
1
2
10 5
3
4
1
2
10 6
3
4
1
2
10 7
3
4
1
2
11 3
3
4
ENGLISH
Installation Manual 91
Test Run
Master Outdoor Unit Subcooling Inlet Temperature
Sensor open or short
Slave1 Outdoor Unit Subcooling Inlet Temperature
Sensor open or short
Slave2 Outdoor Unit Subcooling Inlet Temperature
Sensor open or short
Slave3 Outdoor Unit Subcooling Inlet Temperature
Sensor open or short
Master Outdoor Unit Subcooling Outlet Temperature
Sensor open or short
Slave1 Outdoor Unit Subcooling Outlet Temperature
Sensor open or short
Slave2 Outdoor Unit Subcooling Outlet Temperature
Sensor open or short
Slave3 Outdoor Unit Subcooling Outlet Temperature
Sensor open or short
Pressure unbalance between Outdoor Units
Pressure unbalance between Outdoor Units
Pressure unbalance between Outdoor Units
Pressure unbalance between Outdoor Units
Comp locking, Check Valve leakage, comp dielectric
break down at Master Outdoor Unit
Comp locking, Check Valve leakage, comp dielectric at
Slave1 Outdoor Unit
Comp locking, Check Valve leakage, comp dielectric at
Slave2 Outdoor Unit
Comp locking, Check Valve leakage, comp dielectric at
Slave3 Outdoor Unit
Master Outdoor Unit Fan Inverter PCB Temperature is
Over 95°C
Slave1 Outdoor Unit Fan Inverter PCB Temperature is
Over 95°C
Slave2 Outdoor Unit Fan Inverter PCB Temperature is
Over 95°C
Slave3 Outdoor Unit Fan Inverter PCB Temperature is
Over 95°C
Master Outdoor Unit Subcooling
Inlet Temperature Sensor Error
Slave1 Outdoor Unit Subcooling
Inlet Temperature Sensor Error
Slave2 Outdoor Unit Subcooling
Inlet Temperature Sensor Error
Slave3 Outdoor Unit Subcooling
Inlet Temperature Sensor Error
Master Outdoor Unit Subcooling
Outlet Temperature Sensor Error
Slave1 Outdoor Unit Subcooling
Outlet Temperature Sensor Error
Slave2 Outdoor Unit Subcooling
Outlet Temperature Sensor Error
Slave3 Outdoor Unit Subcooling
Outlet Temperature Sensor Error
Failure of operation mode conversion at Master Outdoor Unit
Failure of operation mode conversion at Slave1 Outdoor Unit
Failure of operation mode conversion at Slave2 Outdoor Unit
Failure of operation mode conversion at Slave3 Outdoor Unit
Master Outdoor Unit Constant
Speed Compressor Fault
Slave1 Outdoor Unit Constant
Speed Compressor Fault
Slave2 Outdoor Unit Constant
Speed Compressor Fault
Slave3 Outdoor Unit Constant
Speed Compressor Fault
Excessive increase of Master
Outdoor Unit Fan PCB Heat Sink
Temperature
Excessive increase of Slave1
Outdoor Unit Fan PCB Heat Sink
Temperature
Excessive increase of Slave2
Outdoor Unit Fan PCB Heat Sink
Temperature
Excessive increase of Slave3
Outdoor Unit Fan PCB Heat Sink
Temperature
Display Title Cause of Error
1
2
11 4
3
4
1
2
11 5
3
4
1
2
15 1
3
4
1
2
17 3
3
4
1
2
19 3
3
4
Outdoor unit related error
92 Outdoor Unit92 Outdoor Unit
Test Run
Master Outdoor Unit Fan PCB Heat Sink Temperature
Sensor open or short
Slave1 Outdoor Unit Fan PCB Heat Sink Temperature
Sensor open or short
Slave2 Outdoor Unit Fan PCB Heat Sink Temperature
Sensor open or short
Slave3 Outdoor Unit Fan PCB Heat Sink Temperature
Sensor open or short
Master Outdoor Unit Fan PCB
Heat Sink Temperature Sensor
Error
Slave1 Outdoor Unit Fan PCB
Heat Sink Temperature Sensor
Error
Slave2 Outdoor Unit Fan PCB
Heat Sink Temperature Sensor
Error
Slave3 Outdoor Unit Fan PCB
Heat Sink Temperature Sensor
Error
Display Title Cause of Error
1
2
19 4
3
4
Outdoor unit related error
ENGLISH
Installation Manual 93
Caution For Refrigerant Leak
The installer and system specialist shall secure safety against leakage according to local regulations or standards.
The following standards may be applicable if local regulations are not available.
Though the R410A refrigerant is harmless and incombustible itself , the room to equip the air conditioner should be large to
such an extent that the refrigerant gas will not exceed the limiting concentration even if the refrigerant gas leaks in the room.
■ Limiting concentration
Check limiting concentration along following steps and take appropriate measure depending on the situation.
■ Calculate amount of all the replenished refrigerant (kg) per each refrigerant
system.
■ Calculate minimum room capacity
Calculate room capacity by regarding a portion as one room or the smaller room.
(1) Without partition
(2) With partition and with opening which serve as
passage of air to adjoining room
Caution For Refrigerant Leak
Introduction
Checking procedure of limiting concentration
Limiting concentration is the limit of Freon gas concentration where immediate measures can be taken without hurting human body when refrigerant leaks in the air. The limiting concentration shall be described in the
unit of kg/m
3
(Freon gas weight per unit air volume) for facilitating calculation.
Limiting concentration: 0.3kg/m
3
(R410A)
Outdoor unit
(No.1 system)
Indoor unit
Flow of
refrigerant
Room where refrigerant leaks
(Refrigerant of the whole No.1
system flows out.)
Amount of replenished
refrigerant per one outdoor
unit system
Amount of replenished
refrigerant at factory shipment
Indoor unit
Amount of additional
+
replenished refrigerant
Amount of additionally
replenished refrigerant
depending on piping
length or piping
diameter at customer
Outdoor unit
Total amount of replenished
=
refrigerant in refrigerant
facility (kg)
Note : In case one refrigerant facility is
divided into 2 or more refrigerant
systems and each system is
independent, amount of replenished
refrigerant of each system shall be
adopted.
Outdoor unit
Indoor unit
Opening
Partition
In the case of opening
without door , or 0.15
% or more openings
(to floor space) both
above and below door)
94 Outdoor Unit94 Outdoor Unit
Caution For Refrigerant Leak
(3) With partition and without opening which serve as passage of air to adjoining room
■ Calculate refrigerant concentration
■ In case the concentration exceeds the limit
When the concentration exceeds the limit, change original plan or take one of the countermeasures
shown below:
• Countermeasure 1
Provide opening for ventilation.
Provide 0.15% or more opening to floor space both above and below door, or provide opening without
door.
• Countermeasure 2
Provide gas leak alarm linked with mechanical ventilator.
Reducing the outdoor refrigerant qty.
Pay a special attention to the place, such as a basement, etc. where refrigerant can stay, since refrigerant is
heavier than air.
Outdoor unit
Indoor unit
Smallest
room
Total amount of replenished
refrigerant in refrigerant facility (kg)
Capacity of smallest room where
indoor unit is installed (m
3
)
Refrigerant concentration
=
(R410A)
(kg/m
In case the result of calculation exceeds
the limiting concentration, perform the
3
)
same calculations by shifting to the
second smallest, and the third smallest
rooms until at last the result is below the
limiting concentration.
Countermeasure 2
Gas leak alarm
Mechanical ventilator
Indoor unit
Countermeasure 1
Opening effective to ventilation
ENGLISH
Installation Manual 95
Installation guide at the seaside
Installation guide at the seaside
Sea wind Sea wind
CAUTION
1.
Air conditioners should not be installed in areas where corrosive gases, such as acid or alkaline gas, are produced.
2. Do not install the product where it could be exposed to sea wind (salty wind) directly. It can result corrosion
on the product. Corrosion, particularly on the condenser and evaporator fins, could cause product malfunction or inefficient performance.
3. If outdoor unit is installed close to the seaside, it should avoid direct exposure to the sea wind. Otherwise it
needs additional anticorrosion treatment on the heat exchanger.
Selecting the location(Outdoor Unit)
1) If the outdoor unit is to be installed close to the seaside, direct exposure to the sea wind should be avoided.
Install the outdoor unit on the opposite side of the sea wind direction.
2) In case, to install the outdoor unit on the seaside, set up a windbreak not to be exposed to the sea wind.
Windbreak
Sea wind
• It should be strong enough like concrete to prevent
the sea wind from the sea.
• The height and width should be more than 150% of
the outdoor unit.
• It should be keep more than 70 cm of space
between outdoor unit and the windbreak for easy
air flow.
3) Select a well-drained place.
1.
If you can’t meet above guide line in the seaside installation, please contact LG Electronics for the additional anticorrosion treatment.
2. Periodic ( more than once/year ) cleaning of the dust or salt particles stuck on the heat exchanger by using water
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