http://www.lghvac.com
www.lg.com
P/NO : MFL46912304
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.
ENGLISH
FRANÇAIS
ESPAÑOL
2 Outdoor Unit
CAUTION
: Improper installation, adjustment, alteration, service or maintenance can void the warranty.
The weight of the condensing unit requires caution and proper handling procedures when lifting
or moving to avoid personal injury. Use care to avoid contact with sharp or pointed edges.
Safety Precautions
• Always wear safety eye wear and work gloves when installing equipment.
• Never assume electrical power is disconnected. Check with meter and equipment.
• Keep hands out of fan areas when power is connected to equipment.
• R-410A causes frostbite burns.
• R-410A is toxic when burned.
NOTE TO INSTALLING DEALER: The Owners Instructions and Warranty are to be given to the owner
or prominently displayed near the indoor Furnace/Air Handler Unit.
When wiring:
Electrical shock can cause severe personal injury or death. Only a qualified,
experienced electrician should attempt to wire this system.
• Do not supply power to the unit until all wiring and tubing are completed or reconnected and checked.
• Highly dangerous electrical voltages are used in this system. Carefully refer to the wiring diagram and these
instructions when wiring. Improper connections and inadequate grounding can cause accidental injury or death.
• Ground the unit following local electrical codes.
• Connect all wiring tightly. Loose wiring may cause overheating at connection points and a possible fire hazard.
When transporting:
Be careful when picking up and moving the indoor and outdoor units. Get a partner to help, and
bend your knees when lifting to reduce strain on your back. Sharp edges or thin aluminum fins on
the air conditioner can cut your finger.
When installing...
... in a wall: Make sure the wall is strong enough to hold the unit's weight.
It may be necessary to construct a strong wood or metal frame to provide added support.
... in a room: Properly insulate any tubing run inside a room to prevent "sweating" that can cause
dripping and water damage to wall and floors.
... in moist or uneven locatinons: Use a raised concrete pad or concrete blocks provide a solid,
level foundation for the outdoor unit. This prevents water damage and abnormal vibration.
... in an area with high winds: Securely anchor the outdoor unit down with bolts and a metal
frame. Provide a suitable air baffle.
... in a snowy area(for Heat Pump Model): Install the outdoor unit on a raised platform that is
higher than drifting snow. Provide snow vents.
When connecting refrigerant tubing
• Keep all tubing runs as short as possible.
• Use the flare method for connecting tubing.
• Check carefully for leaks before starting the test run.
When servicing
• Turn the power OFF at the main power box(mains) before opening the unit to check or repair
electrical parts and wiring.
• Keep your fingers and clothing away from any moving parts.
• Clean up the site after you finish, remembering to check that no metal scraps or bits of wiring have
been left inside the unit being serviced.
Special warnings
WARNING
• Installation or repairs made by unqualified persons can result in hazards to you and others.
Installation MUST conform with local building codes or, in the absence of local codes, with the National Electrical
Code NFPA 70/ANSI C1-1993 or current edition and Canadian Electrical Code Part1 CSA C.22.1.
• The information contained in the manual is intended for use by a qualified service technician familiar with safety
procedures and equipped with the proper tools and test instruments.
• Failure to carefully read and follow all instructions in this manual can result in equipment malfunction, property
damage, personal injury and/or death.
IMPORTANT!!
Please read this instruction sheet completely before installing the product.!
This air conditioning system meets strict safety and operating standards. As the installer or service
person,it is an important part of your job to install or service the system so it operates safely and
efficiently.
Installation Manual 3
ENGLISH
ARUB Series Outdoor Unit Installation Manual
TABLE OF CONTENTS
Safety Precautions ...............................................................................................................4
Installation Process..............................................................................................................8
Outdoor Unit Information.....................................................................................................9
Environment-friendly Alternative Refrigerant R410A......................................................13
Select the Best Location ....................................................................................................13
Installation Space ...............................................................................................................15
Lifting method.....................................................................................................................19
Installation...........................................................................................................................20
Refrigerant piping installation...........................................................................................22
Electrical Wiring..................................................................................................................41
HR unit PCB ........................................................................................................................54
Main PCB .............................................................................................................................65
Test Run...............................................................................................................................72
Caution For Refrigerant Leak ............................................................................................89
Installation guide at the seaside .......................................................................................91
4 Outdoor Unit
Safety Precautions
Safety Precautions
To prevent injury to the user or other people and property damage, the following instructions must
be followed.
n Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is
classified by the following indications.
n 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.
n 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 top-
ple and result in injury.
Do not install the product on a defective
installation stand.
• It may cause injury, accident, or damage to the
product.
ENGLISH
Installation Manual 5
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.
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 explo-
sion.
n 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 refrig-
erant 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 electro-
static filter, if the unit is so equipped.)
• There is risk of physical injury, electric shock, or
product failure.
n 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.
6 Outdoor Unit
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, com-
munication station, or similar place, provide
sufficient protection against noise.
•
The inverter equipment, private power generator,
high-frequency medical equipment, or radio com-
munication equipment may cause the air condition-
er to operate erroneously, or fail to operate. On the
other hand, the air conditioner may affect such
equipment by creating noise that disturbs medical
treatment or image broadcasting.
Do not install the product where it is exposed to sea wind (salt spray) directly.
• It may cause corrosion on the product. Corrosion, particularly on the condenser and evaporator fins,
could cause product malfunction or inefficient operation.
n Operation
Do not use the air conditioner in special
environments.
• Oil, steam, sulfuric smoke, etc. can significantly
reduce the performance of the air conditioner or
damage its parts.
Do not block the inlet or outlet.
• It may cause failure of appliance or accident.
Make the connections securely so that the
outside force of the cable may not be applied
to the terminals.
• Inadequate connection and fastening may gen-
erate heat and cause a fire.
Be sure the installation area does not deteri-
orate with age.
• If the base collapses, the air conditioner could
fall with it, causing property damage, product
failure, or personal injury.
Install and insulate the drain hose to ensure that water is drained away properly based on the
installation manual.
• A bad connection may cause water leakage.
ENGLISH
Installation Manual 7
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.
8 Outdoor Unit
Installation Process
Installation Process
The foundation must be level
Outdoor unit foundation work
Avoid short circuits and ensure >
sufficient space is allowed >
for service
Installation of outdoor unit
In the final check for 24hours at 3.80 MPa(38.7 kgf/cm
2
) there must be no drop in pressure.
Airtight Test
Multiple core cable must not be used.>
(suitable cable shouldbe 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 and HR 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
Refer to automatic addressing for Indoor units and pipe detection. >
>
Preheat the crank case with the electrical heater for more than 6 hours.>
(In case of the outdoor temperature below 10°C(50˚F))>
>
Automatic addressing for Indoor !
units and pipe detection!
!
Run each indoor unit in turn to make sure the pipe work has been fitted correctly
Test run adjustment
Transfer to customer with explanation
Explain the proper use of the system as clearly as possible to your customer and make
sure all relevant documentations are in order.
CAUTION:
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.
Make sure additional charge the refrigerant before automatic addressing of indoor and pipe searching.
Outdoor Units Information
Outdoor Units Information
Power Supply: Outdoor Unit (3Ø, 208/230V, 60Hz)
CAUTION: Ratio of the connectable Indoor Units to the Outdoor: Within 50 ~ 130%
Ratio of the running Indoor Units to the Outdoor: Within 10 ~ 100%
A combination operation over 100% cause to reduce the total capacity.
n Heat Recovery
Unit
Model(HP(Ton))
Model Combination Unit
Independent Unit
Product Charge kg(lbs)
CF(Correction Factor) kg(lbs)
Max. Connectable No. of Indoor Units
Net Weight kg
lbs
Dimensions mm
(WxHxD) inch
Connecting Pipes
Liquid Pipes[mm(
inch
)]
Low Pressure Pipes[mm(inch)]
High Pressure Gas Pipes[mm(inch)]
1 Outdoor Unit 2 Outdoor Units
8(6.5) 10(8.0) 12(9.5) 16(12.5)
ARUB076BT2 ARUB096BT2 ARUB115BT2 ARUB154BT2
ARUB076BT2
ARUB076BT2
8(17.6) 8(17.6) 8(17.6) 8+8(17.6+17.6)
-1(-2.2) 0(0) 1(2.2) -2(-4.4)
13 16 19 26
285 285 285 285+285
628 628 628 628+628
1,280x1,607x730 1,280x1,607x730 1,280x1,607x730
(1,280x1,607x730)x2
50-3/8 x 63-5/16 x 28-11/16 50-3/8 x 63-5/16 x 28-11/16 50-3/8 x 63-5/16 x 28-11/16
(50-3/8 x 63-5/16 x 28-11/16)x2
9.52(3/8) 9.52(3/8) 12.7(1/2) 12.7(1/2)
19.05(3/4) 22.2(7/8) 28.58(1 1/8) 28.58(1 1/8)
15.88(5/8) 19.05(3/4) 19.05(3/4) 22.2(7/8)
Unit
Model(HP(Ton))
Model Combination Unit
Independent Unit
Product Charge kg(lbs)
CF(Correction Factor) kg(lbs)
Max. Connectable No. of Indoor Units
Net Weight kg
lbs
Dimensions mm
(WxHxD) inch
Connecting Pipes
Liquid Pipes[mm(
inch
)]
Low Pressure Pipes[mm(inch)]
High Pressure Gas Pipes[mm(inch)]
2 Outdoor Unit
18(14.5) 20(16.0) 22(17.5) 24(19.0)
ARUB173BT2 ARUB192BT2 ARUB211BT2 ARUB230BT2
ARUB096BT2 ARUB096BT2 ARUB115BT2 ARUB115BT2
ARUB076BT2 ARUB096BT2 ARUB096BT2 ARUB115BT2
8+8(17.6+17.6) 8+8(17.6+17.6) 8+8(17.6+17.6) 8+8(17.6+17.6)
-1(-2.2) 0(0) 1(2.2) 2(4.4)
29 32 35 39
285+285 285+285 285+285 285+285
628+628 628+628 628+628 628+628
(1,280x1,607x730)x2 (1,280x1,607x730)x2 (1,280x1,607x730)x2 (1,280x1,607x730)x2
(50-3/8 x 63-5/16 x 28-11/16)x2 (50-3/8 x 63-5/16 x 28-11/16)x2 (50-3/8 x 63-5/16 x 28-11/16)x2 (50-3/8 x 63-5/16 x 28-11/16)x2
15.88(5/8) 15.88(5/8) 15.88(5/8) 15.88(5/8)
28.58(1 1/8) 28.58(1 1/8) 34.9(1 3/8) 34.9(1 3/8)
22.2(7/8) 22.2(7/8) 28.58(1 1/8) 28.58(1 1/8)
ENGLISH
Installation Manual 9
10 Outdoor Unit
Outdoor Units Information
Unit
Model(HP(Ton))
Model Combination Unit
Independent Unit˜
Product Charge kg(lbs)
CF(Correction Factor) kg(lbs)
Max. Connectable No. of Indoor Units
Net Weight kg
lbs
Dimensions mm
(WxHxD) inch
Connecting Pipes
Liquid Pipes[mm(
inch
)]
Low Pressure Pipes[mm(inch)]
High Pressure Gas Pipes[mm(inch)]
3 Outdoor Units
26(20.5) 28(22.5) 30(24.0) 32(25.5)
ARUB250BT2 ARUB270BT2 ARUB290BT2 ARUB310BT2
ARUB096BT2 ARUB096BT2 ARUB096BT2 ARUB115BT2
ARUB076BT2 ARUB096BT2 ARUB096BT2 ARUB096BT2
ARUB076BT2 ARUB076BT2 ARUB096BT2 ARUB096BT2
8+8+8(17.6+17.6+17.6) 8+8+8(17.6+17.6+17.6) 8+8+8(17.6+17.6+17.6) 8+8+8(17.6+17.6+17.6)
-2(-4.4) -1(-2.2) 0(0) 1(2.2)
42 45 49 52
285+285+285 285+285+285 285+285+285 285+285+285
628+628+628 628+628+628 628+628+628 628+628+628
(1,280x1,607x730)x3 (1,280x1,607x730)x3 (1,280x1,607x730)x2 (1,280x1,607x730)x2
(50.4x63.3x28.7)x3 (50.4x63.3x28.7)x3 (50.4x63.3x28.7)x2 (50.4x63.3x28.7)x2
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)
28.58(1 1/8) 28.58(1 1/8) 28.58(1 1/8) 28.58(1 1/8)
Unit
Model(HP(Ton))
Model Combination Unit
Independent Unit˜
Product Charge kg(lbs)
CF(Correction Factor) kg(lbs)
Max. Connectable No. of Indoor Units
Net Weight kg
lbs
Dimensions mm
(WxHxD) inch
Connecting Pipes
Liquid Pipes[mm(
inch
)]
Low Pressure Pipes[mm(inch)]
High Pressure Gas Pipes[mm(inch)]
3 Outdoor Units
34(27.0) 36(28.5)
ARUB330BT2 ARUB350BT2
ARUB115BT2 ARUB115BT2
ARUB115BT2 ARUB115BT2
ARUB096BT2 ARUB115BT2
8+8+8(17.6+17.6+17.6) 8+8+8(17.6+17.6+17.6)
2(4.4) 3(6.6)
55 58
285+285+285 285+285+285
628+628+628 628+628+628
(1,280x1,607x730)x2 (1,280x1,607x730)x2
(50.4x63.3x28.7)x2 (50.4x63.3x28.7)x2
19.05(3/4) 19.05(3/4)
34.9(1 3/8) 41.3(1 5/8)
28.58(1 1/8) 28.58(1 1/8)
ENGLISH
Installation Manual 11
Outdoor Units Information
Power Supply: Outdoor Unit (3Ø, 460V, 60Hz)
n Heat Recovery
Unit
Model(HP(Ton))
Model Combination Unit
Independent Unit˜
Product Charge kg(lbs)
CF(Correction Factor) kg(lbs)
Max. Connectable No. of Indoor Units
Net Weight kg
lbs
Dimensions mm
(WxHxD) inch
Connecting Pipes
Liquid Pipes[mm(
inch
)]
Low Pressure Pipes[mm(inch)]
High Pressure Gas Pipes[mm(inch)]
1 Outdoor Unit
8(6.5) 10(8.0) 12(9.5) 14(11.0)
ARUB076DT2 ARUB096DT2 ARUB115DT2 ARUB134DT2
ARUB076DT2 ARUB096DT2 ARUB115DT2 ARUB134DT2
8(17.6) 8(17.6) 8(17.6) 8(17.6)
-1(-2.2) 0(0) 1(2.2) 2(4.4)
13 16 20 23
240 285 285 285
529 628 628 628
1,280x1,607x730 1,280x1,607x730 1,280x1,607x730 1,280x1,607x730
50.4x63.3x28.7 50.4x63.3x28.7 50.4x63.3x28.7 50.4x63.3x28.7
9.52(3/8) 9.52(3/8) 12.7(1/2) 12.7(1/2)
19.05(3/4) 22.2(7/8) 28.58(1 1/8) 28.58(1 1/8)
15.88(5/8) 19.05(3/4) 19.05(3/4) 19.05(3/4)
Unit
Model(HP(Ton))
Model Combination Unit
Independent Unit
Product Charge kg(lbs)
CF(Correction Factor) kg(lbs)
Max. Connectable No. of Indoor Units
Net Weight kg
lbs
Dimensions mm
(WxHxD) inch
Connecting Pipes
Liquid Pipes[mm(
inch
)]
Low Pressure Pipes[mm(inch)]
High Pressure Gas Pipes[mm(inch)]
1 Outdoor Unit 2 Outdoor Units
16(12.5) 18(14.5 ) 20(16.0) 22(17.5)
ARUB154DT2 ARUB173DT2 ARUB192DT2 ARUB211DT2
ARUB154DT2 ARUB096DT2 ARUB115DT2 ARUB134DT2
ARUB076DT2 ARUB076DT2 ARUB076DT2
8(17.6) 8+8(17.6+17.6) 8+8(17.6+17.6) 8+8(17.6+17.6)
3(6.6) -1(-2.2) 0(0) 1(2.2)
26 29 32 35
285 285+240 285+240 285+240
628 628+529 628+529 628+529
1,280x1,607x730 (1,280x1,607x730)x2 (1,280x1,607x730)x2 (1,280x1,607x730)x2
50.4x63.3x28.7 (50.4x63.3x28.7)x2 (50.4x63.3x28.7)x2 (50.4x63.3x28.7)x2
12.7(1/2) 15.88(5/8) 15.88(5/8) 15.88(5/8)
28.58(1 1/8) 28.58(1 1/8) 28.58(1 1/8) 28.58(1 1/8)
22.2(7/8) 22.2(7/8) 22.2(7/8) 28.58(1 1/8)
Unit
Model(HP(Ton))
Model Combination Unit
Independent Unit
Product Charge kg(lbs)
CF(Correction Factor) kg(lbs)
Max. Connectable No. of Indoor Units
Net Weight kg
lbs
Dimensions mm
(WxHxD) inch
Connecting Pipes
Liquid Pipes[mm(
inch
)]
Low Pressure Pipes[mm(inch)]
High Pressure Gas Pipes[mm(inch)]
2 Outdoor Units
24(19.0) 26(20.5) 28(22.5) 30(24.0)
ARUB230DT2 ARUB250DT2 ARUB270DT2 ARUB290DT2
ARUB154DT2 ARUB134DT2 ARUB134DT2 ARUB154DT2
ARUB076DT2 ARUB115DT2 ARUB134DT2 ARUB134DT2
8+8(17.6+17.6) 8+8(17.6+17.6) 8+8(17.6+17.6) 8+8(17.6+17.6)
2(4.4) 3(6.6) 4(8.8) 5(11.0)
39 42 45 49
285+240 285x2 285x2 285x2
628+529 628x2 628x2 628x2
(1,280x1,607x730)x2 (1,280x1,607x730)x2 (1,280x1,607x730)x2 (1,280x1,607x730)x2
(50.4x63.3x28.7)x2 (50.4x63.3x28.7)x2 (50.4x63.3x28.7)x2 (50.4x63.3x28.7)x2
15.88(5/8) 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)
28.58(1 1/8) 28.58(1 1/8) 28.58(1 1/8) 28.58(1 1/8)
12 Outdoor Unit
Outdoor Units Information
Unit
Model(HP(Ton))
Model Combination Unit
Independent Unit
Product Charge kg(lbs)
CF(Correction Factor) kg(lbs)
Max. Connectable No. of Indoor Units
Net Weight kg
lbs
Dimensions mm
(WxHxD) inch
Connecting Pipes
Liquid Pipes[mm(
inch
)]
Low Pressure Pipes[mm(inch)]
High Pressure Gas Pipes[mm(inch)]
2 Outdoor Units 3 Outdoor Units
32(25.5) 34(27.0) 36(28.5) 38(30.0)
ARUB310DT2 ARUB330DT2 ARUB350DT2 ARUB370DT2
ARUB154DT2 ARUB134DT2 ARUB134DT2 ARUB154DT2
ARUB154DT2 ARUB115DT2 ARUB134DT2 ARUB134DT2
ARUB076DT2 ARUB076DT2 ARUB076DT2
8+8(17.6+17.6) 8+8+8(17.6+17.6+17.6) 8+8+8(17.6+17.6+17.6) 8+8+8(17.6+17.6+17.6)
6(13.2) 2(4.4) 3(6.6) 4(8.8)
52 55 58 61
285x2 285x2+240 285x2+240 285x2+240
628x2 628x2 + 529 628x2 + 529 628x2 + 529
(1,280x1,607x730)x2 (1,280x1,607x730)x3 (1,280x1,607x730)x3 (1,280x1,607x730)x3
(50.4x63.3x28.7)x2 (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) 19.05(3/4)
34.9(1 3/8) 34.9(1 3/8) 41.3(1 5/8) 41.3(1 5/8)
28.58(1 1/8) 28.58(1 1/8) 28.58(1 1/8) 28.58(1 1/8)
Unit
Model(HP(Ton))
Model Combination Unit
Independent Unit
Product Charge kg(lbs)
CF(Correction Factor) kg(lbs)
Max. Connectable No. of Indoor Units
Net Weight kg
lbs
Dimensions mm
(WxHxD) inch
Connecting Pipes
Liquid Pipes[mm(
inch
)]
Low Pressure Pipes[mm(inch)]
High Pressure Gas Pipes[mm(inch)]
3 Outdoor Units
40(32.0) 42(33.5) 44(35.0) 46(36.5)
ARUB390DT2 ARUB410DT2 ARUB430DT2 ARUB450DT2
ARUB154DT2 ARUB154DT2 ARUB154DT2 ARUB154DT2
ARUB154DT2 ARUB154DT2 ARUB154DT2 ARUB154DT2
ARUB076DT2 ARUB096DT2 ARUB115DT2 ARUB134DT2
8+8+8(17.6+17.6+17.6) 8+8+8(17.6+17.6+17.6) 8+8+8(17.6+17.6+17.6) 8+8+8(17.6+17.6+17.6)
5(11.0) 6(13.2) 7(15.4) 8(17.6)
64 64 64 64
285x2+240 285x3 285x3 285x3
628x2 + 529 628x3 628x3 628x3
(1,280x1,607x730)x3 (1,280x1,607x730)x3 (1,280x1,607x730)x3 (1,280x1,607x730)x3
(50.4x63.3x28.7)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) 19.05(3/4)
41.3(1 5/8) 41.3(1 5/8) 41.3(1 5/8) 41.3(1 5/8)
28.58(1 1/8) 28.58(1 1/8) 28.58(1 1/8) 28.58(1 1/8)
Unit
Model(HP(Ton))
Model Combination Unit
Independent Unit
Product Charge kg(lbs)
CF(Correction Factor) kg(lbs)
Max. Connectable No. of Indoor Units
Net Weight kg
lbs
Dimensions mm
(WxHxD) inch
Connecting Pipes
Liquid Pipes[mm(
inch
)]
Low Pressure Pipes[mm(inch)]
High Pressure Gas Pipes[mm(inch)]
3 Outdoor Units
48(38.0)
ARUB470DT2
ARUB154DT2
ARUB154DT2
ARUB154DT2
8+8+8(17.6+17.6+17.6)
9(19.8)
64
285x3
628x3
(1,280x1,607x730)x3
(50.4x63.3x28.7)x3
19.05(3/4)
41.3(1 5/8)
28.58(1 1/8)
ENGLISH
Installation Manual 13
Select the Best Location
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 character-
istic 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 encour-
aged 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
Select the Best Location
n
Select installation location of the HR unit suitable for following conditions
• Avoid a place where rain may enter since the HR unit is for indoor.
• Sufficient service space must be obtained.
• Refrigerant pipe must not exceed limited length.
• Avoid a place subject to a strong radiation heat from other heat source.
• Avoid a place where oil spattering, vapor spray or high frequency electric noise is expected.
• Install the unit at a place in which it is not affected by operation noise. (Installation within cell such as meeting
room etc. may disturb business due to noise.)
• Place where refrigerant piping, drain piping and electrical wiring works are easy.
Inspection door(NOTICE 1)
(servicing space)
481(18-10/11)
345(13-1/2)
300mm(11-7/8 inch) more
(Servicing space)
300mm(11-7/8 inch) more
(Servicing space)
300mm(11-7/8 inch)more
(Servicing space)
450mm(17-3/4 inch) more
(Servicing space)
1
2
3
54
6
7
453(17-7/8)
174(6-7/8)
174(6-7/8)
182(7-1/8)
218(8-1/2)
419(16-1/2)
61(2-7/16)
137(5-3/8)
124(4-7/8)
128(5)
30(1-1/6)
60(2-3/8)
(NOTICE 2)
(NOTICE 2)
450(17-3/4)
450(17-3/4)
100 more100 more
(Serviceing space)(Serviceing space)
100mm(3-15/16 inch) more100mm(3-15/16 inch) more
(Serviceing space)(Serviceing space)
100mm(3-15/16 inch) more
(Serviceing space)
100 more
100 more
(Serviceing space)(Serviceing space)
100mm(3-15/16 inch) more100mm(3-15/16 inch) more
(Serviceing space)(Serviceing space)
100mm(3-15/16 inch) more
(Serviceing space)
:
1. Be sure to install the inspection door at the control box side.
2. If reducers are used, servicing space must be increased equal to reducer's dimension.
NNNNNNN
(Unit: mm(inch))
No. Part Name
Description
PRHR040 PRHR030 PRHR020
1 Low pressure Gas pipe connection port
Ø28.58(1-1/8) Brazing connection Ø28.58(1-1/8) Brazing connection Ø22.2(7/8) Brazing connection
2 High pressure Gas pipe connection port
Ø22.2(7/8)Brazing connection Ø22.2(7/8) Brazing connection Ø19.05(3/4) Brazing connection
3 Liquid pipe connection port
Ø12.7(1/2) Brazing connection
(Before 2011.4.1 Product)
Ø15.88(5/8) Brazing connection
(After 2011.4.1 Product)
Ø12.7(1/2) Brazing connection Ø9.52(3/8) Brazing connection
4 Indoor unit Gas pipe connection port
Ø15.88(5/8) Brazing connection Ø15.88(5/8) Brazing connection Ø15.88(5/8) Brazing connection
5 Indoor unit Liquid pipe connection port
Ø9.52(3/8) Brazing connection Ø9.52(3/8) Brazing connection Ø9.52(3/8) Brazing connection
6 Control box - - -
7 Hanger metal M10 or M8 M10 or M8 M10 or M8
ENGLISH
Installation Manual 15
Installation Space
Installation Space
Individual Installation
n Basic space required
A space of at least 250mm(9-13/16 inch) is necessary at the back for inlet air. Taking servicing, etc. from the
rear into account, a space of about 915mm(36 inches) should be provided, the same as at the front.
915mm(36 inches) or more (Control box is open/close type)
250mm(9-13/16 inch) or more
Top discharge (open in principle)
Front inlet (open in principle)
Rear inlet (open in principle)
A
B
C
D
E
A
B
C
915mm(36 inches) or more>
(Control box is open/close type)>
250mm(9-13/16 inch) or more>
150mm(5-7/8 inch) from the wall
A
B
250mm(9-13/16 inch) or more>
(350mm(13-3/4 inch)or more at the coastal area.)>
150mm(5-7/8 inch) from the wall
B
A
>
Control Box
Front Side
Rear Side
B
A
>
Control Box
Front Side
Rear Side
A
B
>
Control Box
Front Side
Rear Side
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
< Side view > < Top view >
< Side view > < Top view >
C
ED
B
A
B
A
h
H
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 high-
er 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 Ⓐ, Ⓑ.
n When inlet air enters from right and left sides of unit
16 Outdoor Unit
Installation Space
45° or more>
200mm(7-7/8 inch) >
or more>
250mm(9-13/16 inch) >
or more
A
B
C
Air guide>
>
Air outlet guide>
(Procured at the site)>
>
250mm(9-13/16 inch)>
or more
D
E
F
A
B
C
A
B
C
A
B
C
< Front view >
< Front view >
C
< Side view >
E
D
A
Front Side
B
Rear>
Side>
>
Door
< Air guide >
587.6(23-1/8)587.6(23-1/8)
372.5(14-11/16)
390(15-3/8)
1
2
5
(4
-1
5
/1
6
)
723.5(28-1/2)
n When unit is surrounded by walls
915mm(36 inches) or more (Control box is of a open/close type)>
>
250mm(9-13/16 inch) 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
n When there is an obstruction above the unit
ENGLISH
Installation Manual 17
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)
915mm(36 inches) or more (control box is of a open/close type)
250mm(9-13/16 inch) or more
A
B
C
150mm(5-7/8 inch) 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
D D D
DDD
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
= 1250mm(49-1/4 inch) or more >
at the coastal area >
or strong wind area
B
❈
18 Outdoor Unit
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(19.6 inch) 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(3.9 inch), 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.
ENGLISH
Installation Manual 19
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(44 lbs).
• 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.
• Be very careful while carrying ARUN076DT2. It will be tilted in right side.
40°> or less
A
WARNING
Sub line
20 Outdoor Unit
Installation
Location of anchor bolt(To be applied to 1, 2, 3 Units installation)
Installation
n Individual installation
n Collective installation
n Installation foot(Location of anchor bolt)
Unit: mm(inch)>
>
UW1 UW1 UW1
700±2>
(27-9/16±1/16)
UW1 UW1 UW1 UW1 UW1 UW1
10(3/8) 10(3/8)
383>
(15-1/16)
700±2(27-9/16±1/16)
900±2>
(35-7/16±1/16)
383>
(15-1/16)
900±2>
(35-7/16±1/16)
900±2>
(35-7/16±1/16)
900±2>
(35-7/16±1/16)
10(3/8)
383>
(15-1/16)
900±2>
(35-7/16±1/16)
10(3/8)
383>
(15-1/16)
900±2>
(35-7/16±1/16)
900±2>
(35-7/16±1/16)
10(3/8)
383>
(15-1/16)
900±2>
(35-7/16±1/16)
900±2>
(35-7/16±1/16)
10(3/8)
383>
(15-1/16)
150>
(5-7/8)
533>
(20-15/16)
900m
m
>
(35-7/16 inch)
(UW1)
ENGLISH
Installation Manual 21
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(7.8 inch)).
A
B
D
E
F
G
C
Ensure that the corner part can be securely mounted. Otherwise, the support for
installation may be bent. >
Obtain and use the M10 anchor bolt.>
The corner was not properly mounted. >
Outdoor unit (Insert the cushion pad between outdoor unit and base support to ensure that
anti-vibration may be done in a wide area)>
Pipe and wiring space (in case of piping and wiring on the floor surface)>
H-Beam support >
Concrete base support >
>
G
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 mak-
ing 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>
>
22 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 refrig-
erant piping has been completed.
① Pipe joint (auxiliary parts): Securely perform brazing with
a nitrogen blow into the service valve port.(Releasing
pressure : 0.29 psi or less)
② Flare nut: Loose or tighten flare nut by using the wrench
with both ends. Coat the flare connection part with oil for
the compressor.
③ Cap: Remove caps and operate valve, etc. After opera-
tion, always reattach caps (tightening torque of valve
cap: 25Nm (250kg-cm) or more). (Don't remove the
internal part of the port)
④ 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:
10 lbf
•
ft or more).
⑤ Liquid pipe
⑥ Gas pipe
⑦ 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(2.8inch))
CLOSE OPEN
Elbow
Ball Valve(Gas Pipe)
Ball Valve(Liquid Pipe)
ENGLISH
Installation Manual 23
Refrigerant piping installation
When connecting the pipes from the front of the outdoor unit, remove part ①
and part ②.
When connecting the pipes from the side of the outdoor unit, remove part ③
(the whole "Knock out" part).
(Front)
WARNING
After installing the pipe, clog the pipe excavation inlet of the front panel and the side panel
(Wire may be damaged due to entering of rats, animals, etc).
24 Outdoor Unit
Refrigerant piping installation
2 outdoor units
3 outdoor units
Ø31.8(1-1/4)>
>
>
Ø28.58(1-1/8)>
>
Ø28.58(1-1/8)
Ø19.05(3/4)>
>
Ø22.2(7/8)
Ø28.58(1-1/8)
Ø12.7(1/2)
Ø 9.52(3/8)
Ø12.7(1/2)
Ø19.05(3/4)>
>
Ø12.7(1/2)
Ø15.88(5/8)
Ø34.9(1-3/8)>
>
OD28.58(1-1/8)
Ø19.05(3/4)>
>
Ø19.05(3/4)>
>
Ø22.2(7/8)>
>
Ø22.2(7/8)>
>
OD34.9(1-3/8)>
>
>
>
Ø38.1(1-1/2)>
>
>
Ø15.88(5/8)>
>
>
OD19.05(3/4)>
>
Ø28.58(1-1/8)>
>
Ø19.05(3/4)>
>
Ø15.88(5/8)
Ø22.2(7/8)
Ø22.2(7/8)
Ø22.2(7/8)
OD22.2(7/8)
Ø15.88(5/8)
Ø19.05(3/4)>
>
OD12.7(1/2)>
>
>
Ø9.52(3/8)>
>
>
Ø22.2(7/8)>
>
>
OD19.05(3/4)>
>
>
>
Low Pressure Gas Pipe Liquid Pipe High Pressure Gas Pipe
Model!
!
ARCNB20!
!
[Unit:mm(inch)]>
>
[Unit:mm(inch)]>
>
Main pipe
Sub1 outdoor unit
Main outdoor unit
Ø12.7(1/2)
Ø9.52(3/8)
Ø12.7(1/2)
Ø12.7(1/2)
Ø15.88(5/8)
Ø19.05(3/4)
Ø12.7(1/2)
Ø19.05(3/4)
Ø12.7(1/2)
Ø15.88(5/8)
Ø22.2(7/8) Ø19.05(3/4)
Sub1 outdoor
gas pipe
Ø
31.8(1-1/4)
Ø
28.58(1-1/8)
Ø
28.58(1-1/8)
Ø
28.58(1-1/8)
Main pipe
Ø
34.9(1-3/8)>
>
Don't cut the pipe less
than 70mm
Blow nitrogen
while brazing>
>
Main outdoor
gas pipe
Ø38.1(1-1/2)
Ø34.9(1-3/8)
Ø34.9(1-3/8)
Ø28.58(1-1/8)
Ø28.58(1-1/8)
Ø41.3(16-3/5)
Don't cut the pipe less
than 70mm
Blow nitrogen
while brazing>
>
OD28.58>
>
Ø19.05(3/4)
Ø22.2(7/8)
Ø38.1(1-1/2)
OD34.9(1-3/8)
Ø15.88(5/8)>
>
>
OD19.05(3/4)
OD28.58(1-1/8)
Ø19.05(3/4)
Ø22.2(7/8)
Ø22.2(7/8)
OD19.05(3/4)
Ø9.52(3/8)>
>
>
>
OD12.7(1/2)
Ø9.52(3/8)>
>
>
>
OD12.7(1/2)
Connection of gas pipe
Connection of liquid pipe
Connection of gas pipe
Connection of liquid pipe
Model!
!
ARCNN20!
!
Model!
!
ARCNN30!
!
!
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
Within +/- 10°>
>
Connection of Outdoor Units
ENGLISH
Installation Manual 25
Refrigerant piping installation
Installation of Outdoor Unit, HR Unit, Indoor Unit Refrigerant Pipe
3 pipes are connected to the HR unit from the outdoor unit, classified into liquid pipe, low pressure gas pipe and
high pressure gas pipe depending on status of refrigerant passing through the pipe.
You must connect 3 pipes from outdoor unit to HR unit.
For connection between indoor unit and HR unit, you must connect both liquid pipe and gas pipe from the HR
unit to the indoor unit. In this case, connect them to the indoor unit starting from No.1 connection port of the HR
unit (the port number is displayed on ports of the HR unit). Use auxiliary flare as annexed parts in connection to
the indoor unit.
Low pressure
Gas pipe
Gas pipe
Gas pipe
High pressure
Gas pipe
Liquid pipe
Liquid pipe
Liquid pipe
HR Unit
1
2
3
4
CAUTION:
Whenever connecting the indoor units with the HR unit, install the indoor units in numerical order from No.1.
Ex) In case of installing 3 indoor units : No. 1, 2, 3 (O), No. 1, 2, 4 (X), No.1, 3, 4 (X), No.2, 3, 4 (X).
Installation procedure for HR unit
Six-sided Nut
(M10 or M8)
Hanger metal
Hanger metal
Hanger metal
Flat washer
Flat washer
Flat washer
(M10)
Hanging bolt
Hanging bolt
Hanging bolt
(M10 or M8)
A
Insulation
1. Using an insert-hole-in- anchor, hang the hanging bolt.
2. Install a hexagon nut and a flat washer (locally-procured)to the hanging bolt as shown
in the figure in the bottom, and fit the main unit to hang on the hanger metal.
3. After checking with a level that the unit is level, tighten the hexagon nut.
* The tilt of the unit should be within ±5° in front/back and left/right.
4. This unit should be installed suspended from ceiling and side A should always be
facing up.
5. Insulate not used pipes completely as shown in the figure.
26 Outdoor Unit
Refrigerant piping installation
Select an HR unit according to the number of the indoor units to be installed. HR units are classified into 3 types
by the number of connectable indoor units.
Ex) Installation of 6 indoor units
Consists of HR unit for 4 rooms and HR unit for 2 rooms.
Type of HR Unit
PRHR030A(3 rooms)PRHR020A(2 rooms) PRHR040A(4 rooms)
1
2
3
1
2
1
3
2
4
WARNING
• 1 port of HR unit allows up to 14.1kW based on cooling capacity of the indoor unit (up to 14.1kW
(48MBh) for max installation).
• The maximum total capacity of the indoor units connected to one PRHR040 HR unit is 47kW
(160MBh). In case of installation of four indoor units of 14.1kW (48MBh), use two PRHR020's rather
than one PRHR040.
Gas pipe Ø15.88
Liquid pipe Ø9.52
BraGing Gype
1
2
3
4
RemoGe caps on
Ghe braGing part.
Liquid pipe
Low pressure gas pipe
High pressure gas pipe
(Unit: mm)
HR unit PRHR020A PRHR030A PRHR040A
Low pressure gas pipe Ø22.2(7/8) Ø28.58(1-1/8) Ø28.58(1-1/8)
High pressure gas pipe Ø19.05(3/4) Ø22.2(7/8) Ø22.2(7/8)
Liquid pipe Ø9.52(3/8) Ø12.7(1/2)
Ø12.7(1/2)(Before 2011.4.1 Product)
Ø15.88(5/8)(After 2011.4.1 Product)
ENGLISH
Installation Manual 27
Refrigerant piping installation
[ Reducers for indoor unit and HR unit ]
Models
High pressure
Gas pipe
Low pressure
Liquid pipe
Indoor unit
reducer
HR unit
reducer
PRHR020A
OD22.2(7/8) Ø19.05(3/4)
Ø15.88(5/8)
OD15.88(5/8)
Ø12.7(1/2)
Ø6.35(1/4)OD9.52(3/8)
Ø6.35(1/4)OD9.52(3/8)
OD19.05(3/4) Ø15.88(5/8) Ø12.7(1/2)
OD22.2(7/8) Ø19.05(3/4)
Ø15.88(5/8)
PRHR030A
PRHR040A
(Before
2011.4.1
Product)
OD15.88(5/8)
Ø12.7(1/2)
OD22.2(7/8) Ø19.05(3/4)
Ø15.88(5/8)
OD15.88(5/8)
Ø12.7(1/2)
OD28.58(1-1/8) Ø22.2(7/8) Ø19.25(3/4)
OD12.7(1/2) Ø9.52(3/8)
OD12.7(1/2) Ø9.52(3/8)
OD15.88(5/8) Ø12.7(1/2)
OD19.05(3/4) Ø15.88(5/8)
OD28.58(1-1/8) Ø22.2(7/8) Ø19.25(3/4)
OD19.05(3/4) Ø15.88(5/8)
[Unit:mm(inch)]
PRHR040A
(After
2011.4.1
Product)
OD15.88
(5/8)
Ø12.7
(1/2)
Ø9.52
(3/8)
28 Outdoor Unit
Refrigerant piping installation
>6.35(1/4)> 9.52(3/8)> 12.7(1/2)> 15.88(5/8)> 19.05(3/4)> 22.2(7/8)> 25.4(1)>
>
>0.8(0.03)> 0.8(0.03)> 0.8(0.03)> 0.99(0.03)> 0.99(0.03)> 0.99(0.03)> 0.99(0.03)
Minimum thickness
[mm(inch)]
Outer diameter
[mm(inch)]
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. 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 pipe length and the
amount of additional refrigerant.
9. Never use refrigerant to perform an air purge. Always evacuate using a vacuum pump.
10. Always insulate the piping properly. Insufficient insulation will result in a decline in heating/cooling perfor-
mance, drip of condensate and other such problems.
11. 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.
12. 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 compressors and flux can harm the copper piping or refrigerant oil.
13. Diameter of the refrigerant pipe from the HR unit to the indoor unit is determined by capacity of the
indoor unit. The pipe port is installed to suit a large capacity of the indoor unit for the connection flare of
the HR unit. It is sufficient to cut, connect and install the subsidiary flare to suit the pipe of the indoor unit
connected.
14. Take care so that there is no thermal damage on the service valves of the outdoor unit.
(Especially packing part of service port.) Wrap the service valve with a wet towel when brazing it.
Caution
ARBLB01621 ARBLB03321
ARBLB07121 ARBLB14521
Y branch
ENGLISH
Installation Manual 29
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.
Unit: mm(inch)>
>
1,280(50-3/8)
Distance between Outdoor Units
Max. 10(0.39)
= Product length (1,280mm(50-3/8 inch)) + Max. 10(0.39) (distance between outdoor units)
Pipe Length between Outdoor Units
(Low pressure gas pipe, High pressure gas pipe, Liquid pipe)
30 Outdoor Unit
Refrigerant piping installation
Refrigerant piping system
Example : 2 Outdoor units, 4 HR units and 10 indoor units
Ⓐ Outdoor unit
Ⓑ Y branch
Ⓒ HR unit
Ⓓ Indoor unit
WARNING
* : Serial connection of HR units : Capacity sum of indoor units ≤ 160kBtu/hr
• Refer to the HR unit PCB part for the valve group control setting.
• It is recommended that difference in pipe lengths between an HR unit and indoor units, for example
difference in length of a, b, c, and d, be minimized. The larger difference in pipe lengths, the more different
performance between indoor units.
• Piping length from outdoor branch to outdoor unit ≤ 10m(33ft), equivalent length : max 13m(43ft)
(For 18 HP or more)
h If the large capacity indoor units(5~10 HP, using over Ø15.88(5/8) / Ø9.52(3/8))are installed, it should use
Valve Group setting.
A1
C1
D1
D2
D3
D4
D6
D7
D8
D9
D10
E1
E2
A
C1
B
C2
C3
*
B1
B2
A2
a
b
c
d
e
g
j
k
f
i
H
h
"a"
"b"
F2
F1
D
E
C2
D5
C4
C3
Master>
>
Slave 1
■ Case 1 ("a")!
: Maximum height is 15m(236ft) if you install with Y branch.>
>
■ Case 2 ("b")>
: Height is zero(0) m in HR unit serial connector.>
>
ENGLISH
Installation Manual 31
Refrigerant piping installation
Ú Refrigerant pipe diameter between branches and HR units (B,C,D)
Ú
Total pipe length (A+B+C1+C2+C3+D+a+b+c+d+e+f+g+i+j+k) ≤ 1,000m(3,280ft)
Downward indoor unit total capacity
[kW(Btu/h)]
≤ 5.6 (19,100) Ø6.35(1/4) Ø12.7(1/2) Ø9.52(3/8)
< 16.0 (54,600) Ø9.52(3/8) Ø15.88(5/8) Ø12.7(1/2)
< 22.4 (76,400) Ø9.52(3/8) Ø19.05(3/4) Ø15.88(5/8)
< 33 (112,600) Ø9.52(3/8) Ø22.2(7/8) Ø19.05(3/4)
< 47 (160,400) Ø12.7(1/2) Ø28.58(1-1/8) Ø22.2(7/8)
< 71 (242,300) Ø15.88(5/8) Ø28.58(1-1/8) Ø28.58(1-1/8)
< 104 (354,900) Ø19.05(3/4) Ø34.9(1-3/8) Ø28.58(1-1/8)
104 (354,900) ≤ Ø19.05(3/4) Ø41.3(1-5/8) Ø28.58(1 -1/8)
Liquid pipe
[mm(inch)]
Low pressure High pressure
Gas pipe [mm(inch)]
Outdoor unit ~ the farthest indoor unit Equivalent pipe length
A+B+C3+D+K ≤ 150m(492ft)(200m(656ft))(*) A+B+C3+D+K ≤ 175m(574ft)(225m(738ft))(*)
HR Unit ~ neighboring HR Unit
D≤ 10m(33ft)
First indoor branch ~ the farthest indoor unit
B+C3+D+k ≤ 90m(295ft)(*)
First outdoor branch ~ the farthest outdoor unit
E+F3 ≤ 10m(33ft)
Difference in height (outdoor unit ÷ indoor unit)
H ≤ 100m(328ft)
Difference in height (indoor ~ indoor unit)
H ≤ 15m(49ft)
Piping length from each indoor unit to the closest HR Unit
a,b,c,d,e,f,g, i, j, k ≤ 40m(131ft)
E1 ~
D10
C3 ~ C4
B1 ~
D10
E1 ~
A3
H
h
g, I, j, k
CAUTION
• Assume equivalent pipe
length of Y branch to be
0.5m(1.6ft), calculation
purpose.
CAUTION:
• Should not be exceed
10m(33ft) between
neighboring HR unit.
• Serial connection of
HR units : Capacity
sum of indoor units ≤
160kBtu/hr.
32 Outdoor Unit
HR1
48k 48k 48k 48k
1 2 3 4
HR1
36k 36k
A
A
1
1
2
A
HR2
36k 36k
3 4
HR1
12k 12k24k
24k
1 2 3 4
HR2
48k 48k 48k
12k
5 6 7 8
Prohibited pattern
Pattern
Indoor unit
• Capacity sum of indoor units is over 160kBtu/hr.
Y Branch pipe
Pattern
HR
Unit
Outdoor
Unit
Indoor
Unit
Low pressure Gas pipe
High pressure Gas pipe
Liquid pipe
Gas pipe
Liquid pipe
1) under 40m
Keep the sum of indoor capacity is under 160kBtu/hr
Indoor
Unit
Indoor
Unit
Indoor
Unit
Indoor
Unit
Indoor
Unit
Indoor
Unit
Indoor
Unit
Indoor
Unit
Indoor
Unit
Indoor
Unit
Indoor
Unit
Indoor
Unit
2) Same horizontal level
1) under 40m
2) Same horizontal level
Y branch
Height
It's not allowed
Keep the sum of indoor capacity is under 160kBtu/hr
1) Keep the 40m distance from the first branch to the farthest indoor.
2) Keep the horizontal level between HR units.( for example, the same flour. )
ENGLISH
Installation Manual 33
u Outdoor Unit Connection
Ú Refrigerant pipe diameter before 1st branch (A,E,F)
WARNING
When the equivalent length between the outdoor unit and a indoor unit is 90 m or more, the size of main
pipes (only liquid pipe) must be increased one grade.
WARNING
Do not choose the main pipe diameter, namely A, 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 130% of its system capacity (79.9 kW) and
branching one HR unit of four 7k indoor units (8.4kW) at the 1st branch.
Main pipe diameter(22 HP outdoor unit): Ø15.88(5/8)(Liquid pipe), Ø34.9(1-3/8)(Low pressure gas pipe),
Ø28.58(1-1/8)(High pressure gas pipe)
Pipe diameter between 1st and 2nd branch (71.5kW indoor units): Ø19.05(Liquid pipe), Ø34.9(1-3/8)(Low pressure gas pipe)
and Ø28.58(1-1/8)(High pressure gas pipe) in conformity with
downward indoor units.
Since the main pipe diameter of 22HP outdoor unit is Ø15.88(5/8)(Liquid pipe), Ø34.9(1-3/8)(Low pressure gas pipe) ,
Ø28.58(1-1/8)(High pressure gas pipe), it should be used as the diameter of the main pipe and the connection pipe between 1st and
2nd indoor branches.
Liquid pipe
8, 10HP..........................................Ø9.52(3/8) ’ Ø12.7(1/2)
12, 14, 16HP..................................Ø12.7(1/2) ’ Ø15.88(5/8)
18, 20, 22, 24HP............................Ø15.88(5/8) ’ Ø19.05(3/4)
Upward outdoor unit total capacity
[HP]
8 Ø9.52(3/8) Ø19.05(3/4) Ø15.88(5/8)
10 Ø9.52(3/8) Ø22.2(7/8) Ø19.05(3/4)
12 Ø12.7(1/2) Ø28.58(1-1/8) Ø19.05(3/4)
14, 16 Ø12.7(1/2) Ø28.58(1-1/8) Ø22.2(7/8)
18, 20 Ø15.88(5/8) Ø28.58(1-1/8) Ø22.2(7/8)
22, 24 Ø15.88(5/8) Ø34.9(1-3/8) Ø28.58(1-1/8)
Liquid pipe
[mm(inch)]
Low pressure High pressure
Gas pipe [mm(inch)]
u Indoor Unit Connection
Ú Indoor unit connecting pipe from branch (a~k)
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)]
34 Outdoor Unit
u The Amount of Refrigerant
The calculation of the additional charge should take account of the length of pipe.
Additional charge (kg(lbs))>
>
Product charge(1unit)(kg(lbs))>
>
=
+
+
+
+
+
+=
+
Total liquid pipe (m(ft)): Ø22.2mm(7/8inch)
x 0.237 lbs/ft>
x 0.178 lbs/ft>
x 0.116 lbs/ft>
x 0.079 lbs/ft>
x 0.041 lbs/ft>
x 0.015 lbs/ft
Total liquid pipe (m(ft)): Ø19.05mm(3/4inch)
Total liquid pipe (m(ft)): Ø15.88mm(5/8inch)
Total liquid pipe (m(ft)): Ø12.7mm(1/2inch)>
>
Total liquid pipe (m(ft)): Ø9.52mm(3/8inch)
Total liquid pipe (m(ft)): Ø6.35mm(1/4inch)
+
x 1.1 lbs>
>
Number of installed HR units>
>
CF(kg(lbs)) (Correction factor)
Total amount(kg(lbs))>
>
If a negative result is obtained from >
the calculation, no refrigerant needs >
to be added.>
>
A
A B
B
CAUTION
Outdoor unit >
HR unit (1EA)>
> Indoor unit>
>
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 + 0.5(HR)+0(CF)>
> = 6.48(kg)>
>
Additional Charge = A x 0.061 + B x 0.061 + C x 0.061>
> +(a + b + c + d + e) x 0.022 + CF>
> = 131 x 0.041 + 65.6 x 0.041 + 65.6 x 0.041>
> + (32.8 x 5) x 0.015 +1.1(HR)+0(CF)>
> = 14.3(lbs) >
>
A: Ø12.7(1/2), 50m(164ft)>
B: Ø9.52(3/8), 10m(33ft)>
C: Ø9.52(3/8), 10m(33ft)>
D: Ø9.52(3/8),10m(33ft)>
E: Ø6.35(1/4), 10m(33ft)
HP(Ton) 8(6.5) 10(8.0) 12(9.5) 14(11.0) 16(12.5) 18(14.5) 20(16.0) 22(17.5) 24(19.0) 26(20.5) 28(22.5)
Product Charge(kg(lbs))
CF(kg(lbs))
8
(17.6)
8
(17.6)
8
(17.6)
8
(17.6)
8
(17.6)
16
(35.3)
16
(35.3)
16
(35.3)
16
(35.3)
16
(35.2)
16
(35.2)
-1
(-2.2)
0
(0)
1
(2.2)
2
(4.4)
3
(6.6)
-1
(-2.2)
0
(0)
1
(2.2)
2
(4.4)
3(6.6) 4(8.8)
HP(Ton) 30(24.0) 32(25.5) 34(27.0) 36(28.5) 38(30.0) 40(32.0) 42(33.5) 44(35.0) 46(36.5) 48(38.0)
Product Charge(kg(lbs))
CF(kg(lbs))
16
(35.2)
16
(35.2)
24
(52.8)
24
(52.8)
24
(52.8)
24
(52.8)
24
(52.8)
24
(52.8)
24
(52.8)
24
(52.8)
5(11.0) 6(13.2) 2(4.4) 3(6.6) 4(8.8) 5(11.0) 6(13.2) 7(15.4) 8(17.6) 9(19.8)
Refrigerant piping installation
ENGLISH
Installation Manual 35
Refrigerant piping installation
WARNING
▶ Regulation for refrigerant leakage
: the amount of refrigerant leakage should satisfy the following equation for human safety.
p 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(6.6ft) 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
≤ 0.44kg / m
3
(0.028(lbs/ft
3
.))
Volume of the room at which indoor unit of the least capacity is installed
u 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.
n Additional refrigerant charging amount (kg) : Ⓒ
= (A x
α+ B x ß) - (AVG x ß)
• A = Total No. of TQ,SE and SF Indoor units, α= 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(0.91 lb) : Ⓑ
3) Indoor refrigerant charging amount
= (5 units x 0.5+1 unit x 0.3) - (5 units x 0.3) = 1.3 kg(0.59 lb) : Ⓒ
▶ Revised the total additional charging amount = Ⓑ + Ⓒ = 2 kg(0.91 lb) +1.3 kg(0.59 lb)
= 3.3 kg(1.50 lb)
+=
Total amount(kg(lb))
AB
+
C
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)
• 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.
Refrigerant piping installation
36 Outdoor Unit
ENGLISH
Installation Manual 37
Refrigerant piping installation
[Unit:mm(inch)]!
!
I.D19.05(3/4)>
>
Models
Low Pressure Gas Pipe High Pressure Gas Pipe
Liquid pipe
ARBLB01621
ARBLB03321
ARBLB07121
ARBLB14521
O.D19.05(3/4)>
>
I.D12.7(1/2)>
>
I.D9.52(3/8)>
>
O.D19.05(3/4)>
>
I.D15.88(5/8)>
>
I.D12.7(1/2)>
>
I.D28.58(1-1/8)>
>
I.D25.4(1)
I.D15.88(5/8)>
>
I.D19.05(3/4)>
>
I.D19.05(3/4)>
>
I.D12.7(1/2)>
>
O.D19.05(3/4)>
>
I.D12.7(1/2)>
>
I.D9.52(3/8)>
>
O.D28.58(1-1/8)>
>
I.D22.2(7/8)>
>
I.D28.58(1-1/8)>
>
I.D19.05(3/4)>
>
I.D28.58(1-1/8)>
>
I.D34.9(1-3/8)>
>
I.D22.2(7/8)>
>
O.D19.05(3/4)>
>
I.D15.88(5/8)>
>
I.D12.7(1/2)>
>
I.D15.88(5/8)>
>
I.D12.7(1/2)>
>
I.D9.52(3/8)>
>
I.D9.52(3/8)>
>
I.D6.35(1/4)>
>
I.D12.7(1/2)>
>
I.D19.05(3/4)>
>
I.D15.88(5/8)>
>
I.D19.05(3/4)>
>
I.D15.88(5/8)>
>
I.D9.52(3/8)>
>
I.D12.7(1/2)>
>
I.D6.35(1/4)>
>
I.D12.7(1/2)>
>
I.D19.05(3/4)>
>
I.D28.58(1-1/8)>
>
I.D22.2(7/8)>
>
I.D28.58(1-1/8)>
>
I.D25.4(1)
I.D12.7(1/2)
I.D15.88(5/8)
I.D15.88(5/8)
I.D15.88(5/8)
I.D12.7(1/2)
I.D12.7(1/2)
I.D9.52(3/8)
I.D9.52(3/8)
I.D9.52(3/8)
I.D6.35(1/4)
I.D6.35(1/4)
I.D6.35(1/4)
I.D12.7(1/2)
I.D12.7(1/2)
I.D12.7(1/2)
I.D6.35(1/4)
I.D9.52(3/8)
I.D9.52(3/8)
I.D9.52(3/8)
I.D6.35(1/4)
I.D12.7(1/2)
I.D15.88(5/8)
I.D15.88(5/8)
I.D15.88(5/8)
I.D19.05(3/4)
I.D19.05(3/4)
I.D19.05(3/4)
I.D12.7(1/2)
I.D12.7(1/2)
I.D9.52(3/8)
O.D12.7(1/2)
O.D12.7(1/2)
I.D9.52(3/8)
I.D6.35(1/4)
I.D34.9(1-3/8)
I.D41.3(1-5/8)
I.D38.1(1-1/2)
O.D22.2(7/8)
I.D19.05(3/4)
I.D15.88(5/8)
I.D41.3(1-15/16)
O.D34.9(1-3/8)
I.D12.7(1/2)
O.D15.88(5/8)
I.D41.3(1-5/8)
O.D38.1(1-1/2)
I.D38.1(1-1/2)
I.D34.9(1-3/8)
I.D34.9(1-3/8)
I.D22.2(7/8)
I.D28.58(1-1/8)
I.D28.58(1-1/8)
I.D38.1(1-1/2)
O.D28.58(1-1/8)
I.D22.2(7/8)
I.D19.05(3/4)
I.D15.88(5/8)
I.D19.05(3/4)
I.D22.2(7/8)
I.D22.2(7/8)
O.D19.05(3/4)
O.D15.88(5/8)
I.D12.7(1/2)
I.D9.52(3/8)
I.D19.05(3/4)
I.D15.88(5/8)
I.D22.2(7/8)
I.D12.7(1/2)
I.D15.88(5/8)
I.D19.05(3/4)
O.D12.7(1/2)
I.D9.52(3/8)
I.D6.35(1/4)
I.D19.05(3/4)
O.D
15.88(5/8)
I.D12.7(1/2)
O.D
9.52(3/8)
I.D19.05(3/4)
I.D19.05(3/4)
I.D19.05(3/4)
O.D19.05(3/4)
O.D19.05(3/4)
I.D12.7(1/2)
I.D12.7(1/2)
I.D15.88(5/8)
I.D15.88(5/8)
I.D22.2(7/8)
I.D22.2(7/8)
I.D22.2(7/8)
I.D25.4(1)
I.D25.4(1)
I.D28.58(1-1/8)
O.D25.4(1)
I.D28.58(1-1/8)
I.D28.58(1-1/8)
I.D28.58(1-1/8)
I.D31.8(1-1/4)
I.D31.8(1-1/4)
I.D22.2(7/8)
I.D22.2(7/8)
O.D22.2(7/8)
I.D15.88(5/8)
I.D15.88(5/8)
I.D12.7(1/2)
I.D19.05(3/4)
I.D19.05(3/4)
O.D19.05(3/4)
I.D34.9(1-3/8)
O.D31.8(1-1/4)
u Y branch pipe
38 Outdoor Unit
Leak Test and Vacuum
(1) Leak test
Leak test should be m
ade by pressurizing nitrogen gas to
3.8 MPa(551 psi). For the test method, refer to the following figure.
(Make a test with the service valves closed. Be also sure to pressurize
low pressure gas pipe and liquid pipe simultaneously)
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 pres-
surization.
* When charging of refrigerant is needed due to a defect of outdoor
unit, pressurize after opening the service valves.
During this test, please using the Vacuum Mode.
(2) Vacuum
Vacuum of the pipe and the indoor units should be made from the port of the outdoor unit's service valve
with the service valve closed. Vacuum should be made from the high pressure gas pipe and the liquid pipe
simultaneously with a vacuum pump including a vacuum gage. (The low pressure gas pipe becomes vacu-
um via the HR unit.) After the degree of vacuum gets to 5 Torr, keep vacuum for more than an hour.
* Never perform air purging by using refrigerant.
During this test, please using the Vacuum Mode.
• Vacuum drying : Use a vacuum pump that can evacuate to -
100.7kPa (5 Torr, -755mmHg).
1. Evacuate the system from the liquid pipes and the high pres-
sure gas pipes with a vacuum pump for over 2 hours and
bring the system to -100.7kPa. After maintaining system
under that condition for over 1 hour, confirm the vacuum
gauge rises. If it rises, the system may contain moisture or
leak.
2. Following should be executed if there is a possibility of mois-
ture remaining inside the pipe.
(Rainwater may enter the pipe during work in the rainy sea-
son or over a long period of time)
After evacuating the system for 2 hours, give pressure to the
system to 0.05 MPa(7.25 psi)(vacuum break) with nitrogen
gas and then evacuate it again with the vacuum pump for 1
hour to -100.7kPa(vacuum drying). If the system cannot be
evacuated to -100.7kPa within 2 hours, repeat the steps of
vacuum break and its drying. Finally, check if the vacuum
gauge rise or not, after maintaining the system in vacuum for
1 hour.
Low pressure gas pipe
Liquid pipeHigh pressure gas pipe
High pressure gas pipe Liquid pipe
Low pressure gas pipe
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 0.01 Mpa(1.45 psi) 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 3.8Mpa(551 psi) is 27 °C(80.6 ˚F)
24 hour later: 3.73 MPa(541 psi), 20°C(68 ˚F)
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.
Refrigerant piping installation
ENGLISH
Installation Manual 39
Refrigerant piping installation
(3) Refrigerant Charged Method
After vacuum completion, primarily charge the calculated amount of additional refrigerant through the high
pressure gas pipe and the liquid pipe. If the refrigerant is not charged any more, secondarily charge the
remaining refrigerant through the low pressure gas pipe and the liquid pipe.
WARNING
• If the primary charging through the high pressure gas pipe and the liquid pipe is not performed after vacuum, wet
air may go into the outdoor unit. If air is mixed with the refrigerant, the refrigerant cycle may malfunction and the
unit may be damaged.
• Charging of refrigerant while the compressor is working is prohibited. Otherwise, liquid may go into the compres-
sor. It may cause faults of the compressor.
• Use a gravimeter accurate to 0.1kg(0.2lb).
• Pipe to be vacuum: liquid pipe, high pressure gas pipe (low pressure gas pipe is vacuumed via the HR unit).
• If other refrigerants are mixed in the original refrigerant, a refrigerant cycle may cause malfunction or damage.
• Add accurate refrigerant quantity via calculation.
Too much or too little refrigerant may cause problems
• Repeated on and off of the indoor units without charging refrigerant may cause faults of EEV.
• 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.
Liquid pipe Liquid pipe
Vacuum and Primary charging Secondary charging
High pressure gas pipe High pressure gas pipe
Low pressure gas pipe Low pressure gas pipe
40 Outdoor Unit
Thermal insulation of refrigerant piping
Heat
insulation
material
Outer
covering
Glass fiber
Adhesive + Heat - resistant polyethylene foam +
Adhesive tape
Indoor Vinyl tape
Floor exposed
Water-proof hemp cloth + Bronze asphalt
Outdoor
Water-proof hemp cloth + >inc plate + Oily paint
Note:
When using polyethylene cover as covering material, asphalt roof-
ing 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
High pressure gas pipe
Communication lines
Communication lines
Separation
Low pressure gas pipe
Power lines
Finishing tape
Insulating material
A
B
C
D
E
F
G
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.)
D
G
E
E
B
A
E
F
C
Power lines
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.)
Refrigerant piping installation
ENGLISH
Installation Manual 41
Electrical Wiring
Remote>
controller
Remote>
controller
Indoor>
unit
Indoor>
unit
Remote>
controller
Remote>
controller
Indoor>
unit
Indoor>
unit
Remote>
controller
Remote>
controller
Indoor>
unit
Indoor>
unit
Remote>
controller
Remote>
controller
Indoor>
unit
Indoor>
unit
Outdoor unit
Outdoor unit
Outdoor unit
Outdoor unit
HR!
unit
HR!
unit
HR!
unit
HR!
unit
2-core shield cable
Multi-core cable
Caution
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 some-
times 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 differ-
ent 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 communi-
cation.
Electrical Wiring
42 Outdoor Unit
Remote>
controller
Remote>
controller
Indoor>
Unit
Indoor>
Unit
Remote>
controller
Remote>
controller
Indoor>
Unit
Indoor>
Unit
Remote>
controller
Remote>
controller
Indoor>
Unit
Indoor>
Unit
Remote>
controller
Remote>
controller
Indoor>
Unit
Indoor>
Unit
Outdoor Unit
Outdoor Unit
Outdoor Unit
Outdoor Unit
2-Core Shield Cable Multi-Core Cable
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.
• Keep power imbalance within 2% of the supply rating. Large imbalance will shorten the life of the
smoothing capacitor.
Master Slave1 Slave2
Master Slave1 Slave2
Master Slave1 Slave2
Master Slave1 Slave2
Remote>
controller
Remote>
controller
Indoor>
unit
Indoor>
unit
Outdoor units
Outdoor units
Outdoor units
Outdoor units
Remote>
controller
Remote>
controller
Indoor>
unit
Indoor>
unit
Remote>
controller
Remote>
controller
Indoor>
unit
Indoor>
unit
HR!
unit
HR!
unit
HR!
unit
2-core shield cable Multi-core cable
>
HR!
unit
Remote>
controller
Remote>
controller
Indoor>
unit
Indoor>
unit
>
Electrical Wiring
ENGLISH
Installation Manual 43
Electrical Wiring
Control box and connecting position of wiring
- Remove all of the screws on front panel, and remove the front panel by pulling it forward.
- Connect communication line between master and
slave 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 out-
door unit and indoor units with shielded wire, con-
nect 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(460V)!
!
Main>
PCB
Magnet>
switch>
Only below >
models : >
ARUB096DT2>
ARUB115DT2>
ARUB134DT2>
ARUB154DT2
Inverter >
PCB
Reactor
Inverter >
FAN PCB
Take care of the phase sequence>
of 3-phase 3-wire power system>
>
Bridge>
diode
UW1 Chassis(208/230V)!
!
Noise>
Filter
Main>
PCB
Magnet>
switch
Inverter >
PCB
Inverter >
FAN PCB
Take care of the phase sequence>
of 3-phase 3-wire power system>
>
Transformer>
>
Noise Filter
44 Outdoor Unit
Communication and Power Lines
1) Communication cable
• Types : shielding wire CVVS or CPEVS
• Cross section : over 1.25mm
2
• Insulation material : PVC
• Maximum allowable temperature: 140°F
• Maximum allowable line length: under 1,000m(3,280ft)
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
• Insulation material : PVC
4) Separation of communication and power lines
• If communication and power lines are run alongside each other then there is a strong likelihood of opera-
tional 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(328ft). For length in excess of
100m(328ft) 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
conduit
• In the same way, when grouping the power lines and signal lines should not be bunched together.
Current capacity of power line Spacing
10A 300mm(11-13/16 inch)
50A 500mm(19-11/16 inch)
100A 1,000mm(39-3/8 inch)
100A over 1,500mm(59-1/16 inch)
100V or more
CAUTION
n 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.
n Use a power wire pipe for the power wiring.
Electrical Wiring
ENGLISH
Installation Manual 45
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 con-
nections.
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.
7. All the wiring should comply with the local electrical legislations.
WARNING
• Be sure to use specified wires for connections so that no external force is imparted to terminal connections. If connec-
tions are not fixed firmly, it may cause heating or fire.
• Be 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.
u Wiring of Main Power Supply and Equipment Capacity
46 Outdoor Unit
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
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.
Electrical Wiring
ENGLISH
Installation Manual 47
Electrical Wiring
u Example Connection of Communication Cable
n 1 Outdoor Unit - 3Ø, 208/230V
3 Phase 3 Wires >
Power supply>
60Hz 208/230V
Power supply>
1 Phase 60Hz>
208/230V
Power supply switch>
(Switch fuse : ELCB)>
>
Power supply switch>
(Switch fuse)
3 Phase 3 Wires Power line(R, S, T)>
Communication line (3 line): Wired remote control >
Single Phase of power supply line(L(1), L(2)) >
Communication line (2 shield line): Between Indoor Unit and Outdoor Unit
(Main Switch)>
>
The GND terminal is a '–' terminal for the central controller, not ground line>
>
HR unit
Between Indoor and Master Outdoor unit>
>
IDUSODU DRY1 DRY2 GND
INTERNET
BABA
12V
Master >
Outdoor unit>
>
3(A) 4(B) 3(A) 4(B) 3(A) 4(B)
HR unit
Pull box(installer option)
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.
48 Outdoor Unit
u 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 equip-
ment 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
3 Phase 3 Wires Power line(R, S, T)>
Communication line (3 line): Wired remote control >
Single Phase of power supply line(L(1), L(2)) >
>
Communication line (2 shield line): >
Between Outdoor Unit and Outdoor Unit
Communication line (2 shield line): >
Between Indoor Unit and Outdoor Unit
Power supply switch>
(Switch fuse : ELCB)>
>
Power supply switch>
(Switch)
Power supply switch>
(Switch)
Slave
Master
Power supply switch>
(Switch fuse : ELCB)>
>
■ When the power source is supplied to!
Each outdoor unit individually.
3 Phase 3 Wires>
Power supply>
60Hz 208/230V
Power supply>
1 Phase 60Hz>
208/230V
(Main Switch)>
>
■ When the power source is supplied to!
Each outdoor unit individually.
3 Phase 3 Wires>
Power supply>
60Hz 208/230V
Power supply>
1 Phase 60Hz>
208/230V
(Main Switch)>
>
HR unit
HR unit
Pull box(installer option)
HR unit
HR unit
Pull box(installer option)
The GND terminal is a '–' terminal for the central controller, not ground line
HR unit
Between Indoor and Master Outdoor unit>
>
Slave >
Outdoor unit>
>
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>
>
3(A) 4(B) 3(A) 4(B)
ENGLISH
Installation Manual 49
Electrical Wiring
u Example Connection of Communication Cable
3 Outdoor Units
HR unit
HR unit
3 Phase 3 Wires Power line(R, S, T)>
Communication line (3 line): Wired remote control >
Single Phase of power supply line(L(1), L(2)) >
>
Communication line (2 shield line): >
Between Outdoor Unit and Outdoor Unit
Communication line (2 shield line): >
Between Indoor Unit and Outdoor Unit
Power supply switch>
(Switch fuse : ELCB)>
>
Power supply switch>
(Switch)>
>
Master
Slave1>
>
Slave2
Power supply switch>
(Switch fuse : ELCB)>
>
■ When the power source is supplied to!
Each outdoor unit individually.
3 Phase 3 Wires>
Power supply>
60Hz 208/230V
Power supply>
1 Phase 60Hz>
208/230V
Power supply switch>
(Switch)>
>
Power supply>
1 Phase 60Hz>
208/230V
(Main Switch)>
>
■ When the power source is supplied to!
Each outdoor unit individually.
3 Phase 3 Wires>
Power supply>
60Hz 208/230V
(Main Switch)>
>
Pull box(installer option)
Pull box(installer option)
HR unit
HR unit
The GND terminal is a '–' terminal for the central controller, not ground line
HR unit
Between Indoor and Master Outdoor unit>
>
Slave >
Outdoor unit>
>
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>
>
3(A) 4(B) 3(A) 4(B)
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 equip-
ment 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.
50 Outdoor Unit
u Example Connection of Communication Cable
n 1 Outdoor Unit - 3Ø, 460V
3 Phase 3 Wires>
Power supply>
60Hz 460V
Power supply>
1 Phase 60Hz>
208/230V
Power supply switch>
(Switch fuse : ELCB)>
>
Power supply switch>
(Switch fuse)
3 Phase 3 Wires Power line(R, S, T)>
Communication line (3 line): Wired remote control >
Single Phase of power supply line(L(1), L(2)) >
Communication line (2 shield line): Between Indoor Unit and Outdoor Unit
(Main Switch)>
>
The GND terminal is a '–' terminal for the central controller, not ground line>
>
HR unit
Between Indoor and Master Outdoor unit>
>
IDUSODU DRY1 DRY2 GND
INTERNET
BABA
12V
Master >
Outdoor unit>
>
3(A) 4(B) 3(A) 4(B) 3(A) 4(B)
Pull box(installer option)
HR 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.
Electrical Wiring
ENGLISH
Installation Manual 51
Electrical Wiring
u 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 equip-
ment 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.
Power supply switch>
(Switch fuse)
3 Phase 3 Wires Power line(R, S, T)>
Communication line (3 line): Wired remote control >
Single Phase of power supply line(L(1), L(2)) >
>
Communication line (2 shield line): >
Between Outdoor Unit and Outdoor Unit
Communication line (2 shield line): >
Between Indoor Unit and Outdoor Unit
Power supply switch>
(Switch fuse : ELCB)>
>
■ When the power source is supplied to!
Each outdoor unit individually.
■ When the power source is supplied to!
Each outdoor unit individually.
Power supply switch>
(Switch fuse)
3 Phase 3 Wires>
Power supply>
60Hz 460V
Power supply>
1 Phase 60Hz>
208/230V
Master
Slave
Power supply switch>
(Switch fuse : ELCB)>
>
3 Phase 3 Wires>
Power supply>
60Hz 460V
Power supply>
1 Phase 60Hz>
208/230V
(Main Switch)>
>
HR unit
HR unit
Pull box(installer option)
HR unit
HR unit
Pull box(installer option)
The GND terminal is a '–' terminal for the central controller, not ground line
HR unit
Between Indoor and Master Outdoor unit>
>
Slave >
Outdoor unit>
>
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>
>
3(A) 4(B) 3(A) 4(B)
52 Outdoor Unit
u 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 equip-
ment 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
HR unit
HR unit
Power supply switch>
(Switch fuse)
Power supply switch>
(Switch fuse)
3 Phase 3 Wires Power line(R, S, T)>
Communication line (3 line): Wired remote control >
Single Phase of power supply line(L(1), L(2)) >
>
Communication line (2 shield line): >
Between Outdoor Unit and Outdoor Unit
Communication line (2 shield line): >
Between Indoor Unit and Outdoor Unit
Power supply switch>
(Switch fuse : ELCB)>
>
■ When the power source is supplied to!
Each outdoor unit individually.
3 Phase 3 Wires>
Power supply>
60Hz 460V
Power supply>
1 Phase 60Hz>
208/230V
(Main Switch)>
>
3 Phase 3 Wires>
Power supply>
60Hz 460V
Power supply>
1 Phase 60Hz>
208/230V
(Main Switch)>
>
Master
Slave1>
>
Slave2
Power supply switch>
(Switch fuse : ELCB)>
>
■ When the power source is supplied to!
Each outdoor unit individually.
Pull box(installer option)
Pull box(installer option)
HR unit
HR unit
The GND terminal is a '–' terminal for the central controller, not ground line
HR unit
Between Indoor and Master Outdoor unit>
>
Slave >
Outdoor unit>
>
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>
>
3(A) 4(B) 3(A) 4(B)
ENGLISH
Installation Manual 53
Electrical Wiring
u Example Connection of Communication Cable
[BUS type]
• Connection of communication cable must be
installed like below figure between indoor unit to out-
door unit.
[STAR type]
• Abnormal operation can be caused by communica-
tion defect, when connection of communication cable
is installed like below figure(STAR type).
HR unit HR unit HR unit HR unit
54 Outdoor Unit
HR Unit PCB
HR Unit PCB
Switch for setup of HR Unit
1. Main function of SW02M
ON S/W Selection
No.1
Method for addressing valves of an HR unit (Auto/Manual)
No.2 Model of HR unit
No.3 Model of HR unit
No.4 Valve group setting
No.5 Valve group setting
No.6 Valve group setting
No.7 Use only in factory production (preset to “OFF”)
No.8 Use only in factory production (preset to “OFF”)
SW02M
1) Selection of the method for addressing valves of an HR unit (Auto/Manual)
Auto
Manual
SW02M
(Dip switch for setup of
the function of HR unit)
SW03M SW04M
SW01M/SW03M/SW04M
(Switch for manual valve
addressing)
SW01M
SW05M
(Switch for
addressing
HR unit)
7-SEG
#1 valve housing
#1 cooling valve LED(green)
#1 heating valve LED(red)
#4 valve housing
Switch No.1 OnSwitch No.1 Off
ENGLISH
Installation Manual 55
HR Unit PCB
2) Selection of the model of the HR unit
h Each model is shipped with the switches No.2 and No.3 pre-adjusted as above in the factory.
1
2
3
1
2
1
3
2
4
(For 2 rooms)
PRHR020A
(For 3 rooms)
PRHR030A
(For 4 rooms)
PRHR040A
1 room
Connected
2 rooms
Connected
3 rooms
Connected
4 rooms
Connected
Initial
Setting
WARNING
• If you want to use a PRHR030A for 2 rooms HR unit after closing the 3rd pipes, set the dip switch for 2 rooms HR unit.
• If you want to use a PRHR030A for 3 rooms HR unit after closing the 4th pipes, set the dip switch for 3 rooms HR unit.
• If you want to use a PRHR040A for 2 rooms HR unit after closing the 3rd and 4th pipes, set the dip switch for 2 rooms HR unit.
• The unused port must be closed with a copper cap, not with a plastic cap.
56 Outdoor Unit
HR Unit PCB
] Y branch pipe
3) Setting the Valve Group.
No.1, 2 Valve
/
No.3, 4 Valve
Control
No.3, 4 Valve
Control
DIP S/W setting
No.2, 3 Valve
Control
No.1, 2 Valve
Control
Not control
Example
Indoor Unit
Indoor Unit
Large capacity indoor unit
Indoor Unit
Indoor Unit
Large capacity indoor unit
Indoor Unit
Indoor Unit
Large capacity indoor unit
Large capacity indoor unit
Large capacity indoor unit
Indoor Unit
Indoor Unit
Indoor Unit
Indoor Unit
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
Models Gas Pipe Liquid pipe
ARBLN03321
[Unit:mm(inch)]
I.D19.05(3/4)
I.D19.05(3/4)
I.D19.05(3/4)
O.D19.05(3/4)
O.D19.05(3/4)
I.D12.7(1/2)
I.D12.7(1/2)
I.D15.88(5/8)
I.D15.88(5/8)
I.D22.2(7/8)
I.D22.2(7/8)
I.D22.2(7/8)
I.D25.4(1)
I.D25.4(1)
I.D12.7(1/2)
I.D12.7(1/2)
I.D12.7(1/2)
I.D6.35(1/4)
I.D9.52(3/8)
I.D9.52(3/8)
I.D9.52(3/8)
I.D6.35(1/4)
I.D28.58(1-1/8)
O.D25.4(1)
Note:
If the large capacity indoor units are installed, below Y branch pipe should be used
ENGLISH
Installation Manual 57
HR Unit PCB
2. SW05M (Rotary S/W for addressing HR unit)
Must be set to '0' when installing only one HR unit.
When installing multiple HR units, address the HR units with sequentially increasing numbers starting from '0'.
Ex) Installation of 3 HR units
3. SW01M/SW03M/SW04M (Dip S/W and tact S/W for manual valve addressing)
- Used in manual addressing of the valve in the HR unit
- Set the address of the valve of the HR unit to the central control address of the connected indoor unit.
- SW01M: selection of the valve to address
SW03M: increase in the digit of 10 of valve address
SW04M: increase in the last digit of valve address
- Prerequisite for manual valve addressing : central control address of each indoor unit must be preset differ-
ently at its wired remote control.
1
2
3
4
1
2
3
4
1
2
3
4
34 34 3 4
S/W No. Setup
No.1 Manual addressing of valve #1
No.2 Manual addressing of valve #2
No.3 Manual addressing of valve #3
No.4 Manual addressing of valve #4
SW03M Increase in the digit of 10 of valve address
SW04M Increase in the last digit of valve address
SW01M
SW03M
SW04M
58 Outdoor Unit
HR Unit PCB
1) Auto addressing for indoor unit
• The address of indoor units would be set by
auto addressing
1) Wait for 3 minutes after applying power supply
(Master and Slave 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
outdoor unit PCB.
4) For completing addressing, 2~7 minutes are
required depending on numbers of indoor unit
connection set.
5) Numbers of inddor unit connection set whose
addressing is completed are indicated for
30seconds on 7-segment LED of the oudoor
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).
1) Auto addressing for indoor unit
2) Auto pipe detection
3) Manual pipe detection(Execute in case of Auto pipe detection failure)
• Turn off all the indoor units before auto addressing.
If indoor unit is operated, auto addressing would not be completed.
Flow chart for auto addressing for indoor units and HR units
SW01B
(DIP S/W)
SW02B
(DIP S/W)
7 - Segment
SW02V
Auto addressing
2) Auto pipe detection
• Turn No.1 of SW02M of HR unit PCB off.
• Confirm that the setting of No.2, 3 of SW02M corresponds with the number of indoor units.
• Reset the power of HR unit PCB
• Turn off the No.5 DIP S/W of main unit PCB when outdoor temperature is below 15°C
• Turn on the No.5 DIP S/W of main unit PCB when outdoor temperature is over 15°C
• Reset the power of outdoor unit.
• Wait for 3minutes.
• Press SW01V of the outdoor unit main PCB for 5 Seconds.
• The number of connected HR unit is displayed.
Ex) In case of installing four HR units : 04
• Operated after 88 is displayed on 7-SEG of the outdoor unit main PCB.
• Pipe detection proceed.
• 5~30 minutes are required depending on the number of the indoor units and outdoor temperature.
• The number of the indoor units installed is displayed on 7-SEG of the outdoor unit main PCB for about 1
minute
(For a HR unit, the number of the indoor units connected to each HR unit is displayed.
• '200' is displayed in case of auto pipe detection error, and auto detection is completed after '88' is disap-
peared.
h Auto pipe detection function : the function that sets connection relationship automatically between the indoor
unit and HR unit.
ENGLISH
Installation Manual 59
HR Unit PCB
3) Manual pipe detection
• Enter the central control address into each indoor unit using its wired remote control.
• Turn No.1 of SW02M of HR unit PCB on.
• Reset the power of HR unit PCB.
• On the HR unit PCB, manually set address of each valve of the HR unit to the central control address of the
indoor unit connected to the valve.
• Turn No.6 of SW03M of outdoor unit PCB on.
• Reset the power of outdoor unit PCB.
• The number of the indoor unit installed is displayed after about 5 minutes.
Ex) HR ‡ The number of the indoor
• Turn No.6 of SW03M of outdoor unit PCB off.
• Reset the power of outdoor unit PCB, HR unit.
• Manual pipe detection is completed
WARNING
• In case that central controller is not installed, remain the address data after installer sets central
control address as he wants
• In case that central controller is installed, there would be central control address in wired remote
control of indoor unit.
• In this case, set the HR unit manual pipe address according to central control address of indoor unit.
• Pipe which is not connected with indoor unit should be set different address with pipe Connected
with indoor unit.
(If addresses are piled up, corresponding valve is not working.
• If you want to change the setting of manual pipe, you should do it on HR unit PCB.
• If an error occurred, it means that manual pipe setting is not completed.
WARNING
1. Execute auto addressing and auto pipe detection again whenever the indoor PCB and HR unit PCB
is replaced.
• Operation error occurs unless power is applied to the indoor and HR units.
2. Error No.200 occurs if the number of connected indoor units and that of scanned indoor units are
different.
3. When auto pipe detection fails, complete it with manual pipe detection (see Manual pipe detection).
4. When auto pipe detection addressing is completed normally, manual pipe detection is not
required.
5. If you want to do auto pipe detection again after auto pipe detection fails, do after reset of outdoor
unit by all means.
60 Outdoor Unit
HR Unit PCB
'88' is displayed on outdoor unit main PCB and
HRunit PCB
Completion of auto addressing
The number of the indoor units connected is
displayed at 7-SEG of the outdoor unit main PCB
after 2~7 minutes
The number of HR units connected is displayed
at 7-SEG of the outdoor unit main PCB
Are the number
of indoor units connected to the outdoor unit
wiring and displayed one equal>
Turn HR unit , indoor unit and outdoor unit on in
the order named.
Wait for 3 minutes
Check power and communication wiring between
outdoor, HR and indoor units
Retry indoor unit auto-addressing after checking
trouble
Incompletion of auto addressing
Press SW02V of the outdoor unit main PCB for 5
seconds
Yes
No
Flow chart of auto-addressing for indoor units
ENGLISH
Installation Manual 61
HR Unit PCB
Completion of auto pipe detection
❇ It is possible to be generated mode changing noise of
heating and cooling which is normal.
There is no mode changing noise at normal operation.
Are the number
of indoor units connected to the
outdoor unit wiring and displayed
one equal>
Reset the power of HR unit PCB
Confirm that the setting of No.2, 3 of
SW02M corresponds with the number of
indoor units.
Confirm the No.5 DIP S/W of SW03M of
outdoor PCB
Outdoor temperature is over 15°C(86°F) : ON
Outdoor temperature is below 15°C(86°F) : OFF
In case of changing SW03M S/W of
outdoor unit, reset the power of outdoor
unit main PCB
Press SW01V of the outdoor unit main PCB
for 5 seconds
88' is displayed on 7-SEG of the outdoor
unit main PCB
Outdoor unit is operated for 5~30 minues.
The number of indoor units detected is
displayed for 30 seconds on the outdoor
unit PCB after outdoor unit stopped
Display error on outdoor unit PCB
Display error on HR unit PCB
Outdoor unit PCB : HR ➠ HR unit
number ➠ Valve number
HR unit : '200'
Check the HR unit and indoor unit
Pipe detection error occur after 30
seconds.
Check the installation of pipe of
outdoor, indoor, HR unit
Incompletion of auto pipe detection
Retry auto pipe detection after
checking trouble
Is the pipe
setting condition
satisfied during the operation of
indoor unit>
Confirmation of indoor unit address setting
Turn No.1 of SW02M of HR unit PCB off.
Wait for 3 minutes
NO
NO
YES
YES
Flow chart of auto addressing for pipe detection
62 Outdoor Unit
HR Unit PCB
Completion of manual pipe detection
Turn No.6 of SW03M of outdoor unit PCB
off.
Reset the power of HR unit PCB.
Enter the central control address into
each indoor unit using its wired remote
control.
On the HR unit PCB, manually set address
of each valve of the HR unit to the central
control address of the indoor unit
connected to the valve.
Reset the power of outdoor unit PCB.
Wait for about 5 minutes.
The number of the indoor units installed is
displayed.
Ex)HR ➠ The number of the indoor
Check the central control address of
indoor and HR unit.
Make sure that reset the outdoor unit
power when changing the central
control unit
Are the number
of indoor units connected to the
outdoor unit and displayed one
equal>
Execute in case of Auto pipe detection
failure
Turn No.1 of SW02M of HR unit PCB on.
Turn No.6 of SW03M of outdoor unit PCB
on.
NO
YES
Flow chart of manual addressing for pipe detection
ENGLISH
Installation Manual 63
HR Unit PCB
Example of manual valve addressing
(In case that an indoor unit of central control address "11" is connected to a valve #1 of an
HR unit)
• Prerequisite for manual valve addressing: central control address of each indoor unit must be preset differ-
ently at its wired remote control
- Above setup must be done for all HR unit valves.
- The valve that is not connected with any indoor unit should be addressed with any other number than used
address numbers of the valves connected with indoor units.
(The valves does not work if the address numbers are same.)
• Operation: None
• Display: None
No.
1
2
3
4
5
Display and setup Setup and Contents
• Operation: Turn dip S/W No.1 on to address valve #1
• Display: Existing value saved in EEPROM is displayed in
7-SEG.
• Operation: Set the digit of 10 to the number in Group High data
of the wired remote control connected to the corresponding
indoor unit to the valve #1 by pressing left tack S/W.
• Display: Digit increasing with the times of pressing tack S/W is
displayed in left 7-SEG
• Operation: Set the digit of 1 to the number in Group Low data
of the wired remote control connected to the corresponding
indoor unit to the valve #1 by pressing right tack S/W.
• Display: Digit increasing with the times of pressing tack S/W is
displayed in right 7-SEG
• Operation: Turn dip S/W No.1 off to save the address of
valve #1
• Display: "11" displayed in 7-SEG disappears
SW01M SW03M SW04M
SW01M SW03M SW04M
SW01M SW03M
SW04M
SW01M SW03M
SW04M
SW01M SW03M SW04M
64 Outdoor Unit
HR Unit PCB
Example of checking valve address
(In case that an indoor unit of central control address "11" is connected to a valve #1 of an
HR unit)
• Operation: Turn dip S/W No.1 on.
• Display: "11" is displayed in 7-SEG
No.
1
2
Display and Setup Setup and Contents
• Operation: Turn dip S/W No.1 on.
• 7-SEG disappeared
SW01M SW03M
SW01M SW03M
Identification of Manual Valve ID (Address)
• Operation: more than 2 dip switches turned on.
• Display: "Er" is displayed in 7-SEG
No.
1
Display and Setup Setup and Contents
SW01M SW03M
ENGLISH
Installation Manual 65
SW01B>
(DIP S/W)
SW02B>
(DIP S/W)
7 - Segment
SW02V>
Auto addressing
Main PCB
Main PCB
66 Outdoor Unit
Main PCB
DIP switch setting
n 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
n 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 3Ø 208/230V 20HP heat pump)
Master model code ‘ Slave1 model code ‘ Total capacity ‘ 2 ‘ 25 ‘ 140
1 ~255 : Master model code
1 ~255 : Slave1 model code
1 ~255 : Slave2 model code
8~48HP : HP number(sum of Master capacity and slave capacity)
1 : cooling only 2 : heat pump 3 : Sync
25 : Normal
140 : 3Ø 208/230V 160 : 3Ø 460V
Example) 3Ø 208/230V 20HP heat pump
151 ‘ 151 ‘ 20 ‘ 2 ‘ 25 ‘ 140
CAUTION
Product may not properly operate if the relevant DIP switch is not properly setup.
}
Refer to table code
Model Code
3Ø 208/230V
Model Code Unit (HP)
190 8
191 10
192 12
3Ø 460V
Model Code Unit (HP)
190 8
191 10
192 12
193 14
194 16
ENGLISH
Installation Manual 67
Main PCB
n Setting the DIP switch
• Set the dip switch with the power turned off. If you change the setting when the power is on, the changed
setting is not applied immediately. The changed setting is applied at the moment that the power is on.
• Instant indoor unit checking, data display mode, and forced oil collecting operation are used when theunits
are running. If you don't have to use those functions after using them, restore the dip switch setting.
1. Settings of Master outdoor unit
SW01B Setting
Short Pipe
Length
Long Pipe Length
Longest Pipe
Length
Standard
RemarksSW02B SettingFunction SW01B Setting
Short Pipe
Length
Long Pipe Length
Longest Pipe
Leng
th
Standard
RemarksSW02B SettingFunction
1234567
ON
1234567
ON
1234567 891011121314
1234567
ON
1234567
ON
1234567 891011121314
1234567
ON
1234567
ON
1234567 891011121314
1234567
ON
1234567
ON
1234567 891011121314
1234567
ON
1234567
ON
1234567 891011121314
1234567
ON
1234567
ON
1234567
ON
1234567
ON
1234567 891011121314
1234567
ON
1234567
ON
1234567 891011121314
1234567
ON
1234567
ON
1234567 891011121314
1234567
ON
1234567
ON
1234567 891011121314
1234567
ON
1234567
ON
1234567 891011121314
68 Outdoor Unit
Main PCB
Snow
Forced
Defrosting
Snow + Forced
Defrosting
Outdoor Unit Fan
Low Static
Pressure
Compensation
SW01B Setting
Outdoor Unit Fan
High Static
Pressure
Compensation
RemarksSW02B SettingFunction
Snow
Forced
Defrosting
Snow + Forced
Defrosting
Outdoor Unit Fan
Low Static
Pressure
Compensation
SW01B Setting
Outdoor Unit Fan
High Static
Pressure
Compensation
RemarksSW02B SettingFunction
1234567
ON
1234567
ON
1234567 891011121314
1234567
ON
1234567
ON
1234567 891011121314
1234567
ON
1234567
ON
1 2 3 4 5 6 7 8 9 10 11 12 13 14
1234567
ON
1234567
ON
1 2 3 4 5 6 7 8 9 10 11 12 13 14
1234567
ON
1234567
ON
1234567 891011121314
1234567
ON
1234567
ON
1234567 891011121314
1234567
ON
1234567
ON
1 2 3 4 5 6 7 8 9 10 11 12 13 14
1234567
ON
1234567
ON
1 2 3 4 5 6 7 8 9 10 11 12 13 14
1234567
ON
1234567
ON
1 2 3 4 5 6 7 8 9 10 11 12 13 14
1234567
ON
1234567
ON
1 2 3 4 5 6 7 8 9 10 11 12 13 14
Night silent
operation
1234567
ON
1234567
ON
1234567 891011121314
1234567
ON
1234567
ON
1234567 891011121314
Pump Down
Forced Oil Return
Vacuum Mode
Pump Down
Forced Oil Return
Vacuum Mode
1234567
ON
1234567
ON
1234567 891011121314
1234567
ON
1234567
ON
1234567 891011121314
1234567
ON
1234567
ON
1 2 3 4 5 6 7 8 9 10 11 12 13 14
1234567
ON
1234567
ON
1 2 3 4 5 6 7 8 9 10 11 12 13 14
1234567
ON
1234567
ON
1234567 891011121314
1234567
ON
1234567
ON
1234567 891011121314
Pump OutPump Out
1234567
ON
1234567
ON
1234567 891011121314
1234567
ON
1234567
ON
1234567 891011121314
ENGLISH
Installation Manual 69
Main PCB
2. Settings of slave outdoor unit
SW01B Setting
Slave
RemarksSW02B SettingFunction SW01B Setting RemarksSW02B SettingFunction
1234567
ON
1234567
ON
1234567 891011121314
1234567
ON
1234567
ON
Unit Back Up
SW01B Setting
Inv Back Up
RemarksSW02B SettingFunction SW01B Setting RemarksSW02B SettingFunction
1234567
ON
1234567
ON
1234567
ON
1234567
ON
1234567 891011121314
1234567
ON
1234567
ON
1234567 891011121314
1234567
ON
1234567
ON
3. Settings of corresponding outdoor unit
70 Outdoor Unit
Main PCB
Group Number setting
Group Number setting for Indoor Units
① Confirm the power of whole system(Indoor Unit, Outdoor Unit) is OFF, otherwise turn off.
② 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 )
③ Turn the whole system on.
④ Set the group and Indoor Unit number with a wired remote control.
⑤ 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)
ENGLISH
Installation Manual 71
Main PCB
WARNING
• Valve address and central control address of its corresponding indoor unit should be set identical in manual
addressing.
Valve (04)
EX)
Valve (03)
Valve (02)
Valve (01)
Indoor unit (04)
Indoor unit (03)
Indoor unit (02)
Indoor unit (01)
Central control address
HR unit
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 2.0 MΩ or more between power supply terminal block and ground.
Do not operate in the case of 2.0 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 Liquid pipe, High Pressure Gas, Low Pressure Gas 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
• Always apply power before 6 hours 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 temperature below
10°C(50˚F))
ENGLISH
Installation Manual 73
Test Run
How to Cope with Test Run Abnormality
The phenomena from main component failure
Compressor
Outdoor
fan
Outdoor
EEV
Not operating
Stop during running
High pressure error
at cooling
Heating failure, fre-
quent defrosting
No operating sound
at applying power
Heating failure,
Frozen outdoor heat
exchanger part
Low pressure error
or discharge temper-
ature error
Motor insulation broken
Motor insulation failure
Motor failure,
Bad ventilation around
outdoor heat exchanger
Bad connector contact
Coil failure
EEV clogged
EEV clogged
Check resistance between terminals and
chassis
Check resistance between terminals and
chassis
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
When system fault occurs, the error code is displayed at indoor unit display or remote control display, the trou-
ble shooting guide is in the service manual
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)
Wait for 3 min. after power
reset
Note 3)
Start
Main PCB
SW01S
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
Main PCB
SW01B
SW02B
Press the black button for 2 sec. on main PCB.
Main PCB
SW01V
Indoor/Outdoor units operate with
air circulation mode
Refrigerant Auto Charging
Press the black button
until '508' is displayed
Judging sensor
normality
Error Display
Refrigerant
Auto Charging
Main pcb
LED
Note 4)
Press the black button on the main PCB for 2 sec.
Main PCB
SW01V
Press the black button for 2 sec. after turning off all
of dip S/W.
Refrigerant Checking
Press the black button
until '608' is displayed.
Refrigerant
Checking
Don>t Perform Sensor Checking
No
Yes
Yes
No
Completed.
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.
Would you perform
the Sensor
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
* 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
3 Heat Exchanger 2
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.
.......
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.
Wait for 3 min. after power reset
Start
Main PCB
SW01S
Set the Dip S/W.
Refrigerant Auto Changing : 1,2,7 ON
Main PCB
SW01B
SW02B
Press the black button on main PCB.
Is it necessary to
charge refrigerant!
Press the black button for 2 sec. after turning off
all of dip S/W.
Yes
No
Press the black button on main PCB.
( Press until >508> is displayed )
Main PCB
SW01V
IDU runs with cooling mode In designated order.
Main PCB
SW01V
Press the black button
IDU and ODU are turned off when Auto Charging
is completed. Close the valve.
Press the black button
*1)
Refrigerant Auto
Charging Process
Main PCB
SW01V
Completed.
*2)
Note
1. After installing the refrigerant charging
device as shown below in figure,
open the valve.
2. In case air temperature is out of guaranteed
temperature, it may end without performing
auto charging.
3.
Refrigerant Charging Time may change
according to the charging amount.
(Refrigerant Charging Time : about 1.5 min/lb)
ENGLISH
Installation Manual 77
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
Liquid Pipe
Gas Pipe
manifold
Capillary Assembly
n 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 desig-
nated Capillary Assembly)
4. : Instability Error( In case the high/low pressure target doesn't get satisfied for some time
after the starting operation)
CAUTION
1. Guaranteed temperature range (Error will occur if temperature is out of range)
IDU : 20°C(68°F) ~ 32°C(90°F)
ODU : 0°C(32°F) ~ 43°C (77°F)
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.
78 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
Wait for 3 min. after power reset
Start
Main
PCB
SW01S
Set the Dip S/W.
Refrigerant Checking : 1,2,7,14 ON
Main
PCB
SW01B
SW02B
Press the black button on main PCB
Press the black button for 2 sec. after
turning off all of dip S/W.
Completed
Press the black button on main PCB.
( Press until >608> is displayed )
Main
PCB
SW01V
IDU runs with cooling mode in order.
Main
PCB
SW01V
Press the black button on main PCB
Main
PCB
SW01V
Note 1)
IDU, ODU are turned off
Note
Judging
Refrigerant
Amount
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.
Excess of
Refrigerant
Scarcity of
Refrigerant
Impossible
To Judge
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 check-
ing 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(68~90°F)
ODU : 10~38°C(50~100.4°F)
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 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.
[Note]
1. Select appropriate RPM referencing noise table.
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.
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.
Main PCB Power Reset
Setting the Fan Max. RPM
Setting Complete
Dip S/W No.12+14 ON
Master ODU
SW01S
Master ODU
SW01B
SW01V
SW02V
Note 1)
Max. RPM setting method
Example of Max. RPM Setting
1 time
1 time
1 time
1 time
1 time
1 time
1 time
1 time
Red buttonBlack button
10.5
9
12
10.5
9
12
10.5
9
Operation
(hr)
6.54008 times8
1 time 1254009 times9
84007 times7
54506 times6
6.54505 times5
84504 times4
55103 times3
6.55102 times2
85101 time1
Judgment
(hr)
Fan Max
RPM
Setting
Step
Night silent operation Function
ENGLISH
Installation Manual 81
Test Run
This function is used for creating vacuum in the system after compressor replacement, ODU parts replace-
ment 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
Vacuum Mode
82 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 slave
011 ’ 051 : No.105 error of master unit
Display Title Cause of Error
01-
02-
03-
04-
05-
06-
07-
09-
10-
11-
1
Master Outdoor Unit Inverter Compressor Drive IPM Fault
212
Slave1 Outdoor Unit Inverter Compressor Drive IPM Fault
3
Slave2 Outdoor Unit Inverter Compressor Drive IPM Fault
1
Master Outdoor Unit Inverter Board Input Current excess (RMS)
222
Slave1 Outdoor Unit Inverter Board Input Current excess (RMS)
3
Slave2 Outdoor Unit Inverter Board Input Current excess (RMS)
1
DC charging is not performed at Master Outdoor Unit after starting
relay turn on.
232
DC charging is not performed at Slave1 Outdoor Unit after starting
relay turn on.
3
DC charging is not performed at Slave2 Outdoor Unit after starting
relay turn on.
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
Serial No.
Poor fan motor operation
Communication error: indoor unit
’ main PCB of outdoor.
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
When the addressing signal doesn't respond for 3mins. suddenly,
while the indoor unit gets the calling signal from the outdoor unit,
Master Outdoor Unit Inverter Compressor
IPM Fault
Slave1 Outdoor Unit Inverter Compressor
IPM Fault
Slave2 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
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
Indoor unit related error
Outdoor unit related error
ENGLISH
Installation Manual 83
Test Run
Display Title Cause of Error
1 System is turned off by Master Outdoor Unit high pressure switch.
242 System is turned off by slave1 Outdoor Unit high pressure switch.
3 System is turned off by slave2 Outdoor Unit high pressure switch.
1
Master Outdoor Unit input voltage is over 487V or below 270V
252
Slave1 Outdoor Unit input voltage is over 487V or below 270V
3
Slave2 Outdoor Unit input voltage is over 487V or below 270V
1
The First Start Failure by Master Outdoor Unit Inverter Compressor
Abnormality
262
The First Start Failure by Slave1 Outdoor Unit Inverter Compressor
Abnormality
3
The First Start Failure by Slave2 Outdoor Unit Inverter Compressor
Abnormality
1
System is turned off by Master Outdoor Unit DC Voltage Over
Charging
282
System is turned off by Slave1 Outdoor Unit DC Voltage Over
Charging
3
System is turned off by Slave2 Outdoor Unit DC Voltage Over
Charging
1
Master Outdoor Unit Inverter Compressor Fault OR Drive Fault
292
Slave1 Outdoor Unit Inverter Compressor Fault OR Drive Fault
3
Slave2 Outdoor Unit Inverter Compressor Fault OR Drive Fault
1
System is turned off by Master Outdoor Unit Inverter Compressor
High Discharge Temperature
322
System is turned off by Slave1 Outdoor Unit Inverter Compressor
High Discharge Temperature
3
System is turned off by Slave2 Outdoor Unit Inverter Compressor
High Discharge Temperature
1
System is turned off by Master Outdoor Uunit Constant Speed High
Discharge Temperature
332
System is turned off by Slave1 Outdoor Unit Constant Speed High
Discharge Temperature
3
System is turned off by Slave2 Outdoor Unit Constant Speed High
Discharge Temperature
1
System is turned off by excessive increase of high pressure of Master
Outdoor Unit
342
System is turned off by excessive increase of high pressure of Slave1
Outdoor Unit
3
System is turned off by excessive increase of high pressure of Slave2
Outdoor Unit
1
System is turned off by excessive decrease of low pressure of Master
Outdoor Unit
352
System is turned off by excessive decrease of low pressure of Slave1
Outdoor Unit
3
System is turned off by excessive decrease of low pressure of Slave2
Outdoor Unit
Master Outdoor Unit High Pressure Switch
Slave1 Outdoor Unit High Pressure Switch
Slave2 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
Master Outdoor Unit Inverter Compressor
Start Failure
Slave1 Outdoor Unit Inverter Compressor
Start Failure
Slave2 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
Master Outdoor Unit Inverter Compressor
Over Current
Slave1 Outdoor Unit Inverter Compressor
Over Current
Slave2 Outdoor Unit Inverter Compressor
Over Current
Master Outdoor Unit Inverter Compressor
High Discharge Temperature
Slave1 Outdoor Unit Inverter Compressor
High Discharge Temperature
Slave2 Outdoor Unit Inverter Compressor
Discharge High 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
High Pressure of Master Outdoor Unit
High Pressure of Slave1 Outdoor Unit
High Pressure of Slave2 Outdoor Unit
Low Pressure of Master Outdoor Unit
Low Pressure of Slave1 Outdoor Unit
Low Pressure of Slave2 Outdoor Unit
Outdoor unit related error
84 Outdoor Unit
Test Run
Display Title Cause of Error
1
Master Outdoor Unit Inverter Compressor CT Sensor open or short
402
Slave1 Outdoor Unit Inverter Compressor CT Sensor open or short
3
Slave2 Outdoor Unit Inverter Compressor CT Sensor open or short
1
Master Outdoor Unit Inverter Compressor Discharge Temperature
Sensor open or short
412
Slave1 Outdoor Unit Inverter Compressor Discharge Temperature
Sensor open or short
3
Slave2 Outdoor Unit Inverter Compressor Discharge Temperature
Sensor open or short
1
Master Outdoor Unit Low Pressure Sensor open or short
422
Slave1 Outdoor Unit Low Pressure Sensor open or short
3
Slave2 Outdoor Unit Low Pressure Sensor open or short
1
Master Outdoor Unit High Pressure Sensor open or short
432
Slave1 Outdoor Unit High Pressure Sensor open or short
3
Slave2 Outdoor Unit High Pressure Sensor open or short
1
Master Outdoor Unit Air Temperature Sensor open or short
442
Slave1 Outdoor Unit Air Temperature Sensor open or short
3
Slave2 Outdoor Unit Air Temperature Sensor open or short
1
Master Outdoor Unit Heat Exchanger Temperature Sensor(Front
side) open or short
452
Slave1 Outdoor Unit Heat Exchanger Temperature Sensor (Front
side) open or short
3
Slave2 Outdoor Unit Heat Exchanger Temperature Sensor(Front
side) open or short
1
Master Outdoor Unit Suction Temperature Sensor open or short
462
Slave1 Outdoor Unit Suction Temperature Sensor open or short
3
Slave2 Outdoor Unit Suction Temperature Sensor open or short
1
Master Outdoor Unit Constant Speed Compressor Discharge
Temperature Sensor open or short
472
Slave1 Outdoor Unit Constant Speed Compressor Discharge
Temperature Sensor open or short
3
Slave2 Outdoor Unit Constant Speed Compressor Discharge
Temperature 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
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
Master Outdoor Unit Low Pressure Sensor
Fault
Slave1 Outdoor Unit Low Pressure Sensor
Fault
Slave2 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
Master Outdoor Unit Air Temperature
Sensor Fault
Slave1 Outdoor Unit Air Temperature
Sensor Fault
Slave2 Outdoor Unit Air Temperature
Sensor Fault
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
Master Outdoor Unit Suction Temperature
Sensor Fault
Slave1 Outdoor Unit Suction Temperature
Sensor Fault
Slave2 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
Outdoor unit related error
ENGLISH
Installation Manual 85
Test Run
Display Title Cause of Error
1
Master Outdoor Unit Heat Exchanger Temperature Sensor (Rear
side) open or short
482
Slave1 Outdoor Unit Heat Exchanger Temperature Sensor (Rear
side) open or short
3
Slave2 Outdoor Unit Heat Exchanger Temperature Sensor (Rear
side) open or short
1
Omitting connection of Master outdoor unit
502
Omitting connection of Slave1 Outdoor Unit
3
Omitting connection of Slave2 Outdoor Unit
511
Excessive connection of indoor units compared to capacity of
Outdoor Unit
1
Failing to receive inverter signal at main PCB of Master Outdoor Unit
522
Failing to receive inverter signal at main PCB of Slave1 Outdoor Unit
3
Failing to receive inverter signal at main PCB of Slave2 Outdoor Unit
531
Failing to receive indoor unit signal at main PCB of Outdoor Unit .
1
Reverse connection or omitting connection of R, S, T power of Master
Outdoor Unit
542
Reverse connection or omitting connection of R, S, T power of Slave1
Outdoor Unit
3
Reverse connection or omitting connection of R, S, T power of Slave2
Outdoor Unit
591
Mixing Installation of Old Sub Outdoor Unit and New Slave Outdoor
Unit
1
Access Error of Inverter PCB of Master Outdoor Unit
602
Access Error of Inverter PCB of Slave1 Outdoor Unit
3
Access Error of Inverter PCB of Slave2 Outdoor Unit
1 Restriction of Master Outdoor Unit
672 Restriction of Slave1 Outdoor Unit
3 Restriction of Slave2 Outdoor Unit
1
Constant CT Sensor open or short of Master Outdoor Unit
702
Constant CT Sensor open or short of Slave1 Outdoor Unit
3
Constant CT Sensor open or short of Slave2 Outdoor Unit
1
Master Outdoor Unit PFC CT Sensor open or short
712
Slave1 Outdoor Unit PFC CT Sensor open or short
3
Slave2 Outdoor Unit PFC CT Sensor open or short
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
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
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 : 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
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
Master Outdoor Unit Fan Lock
Slave1 Outdoor Unit Fan Lock
Slave2 Outdoor Unit Fan Lock
Constant CT Sensor Error of Master
Outdoor Unit
Constant CT Sensor Error of Slave1
Outdoor Unit
Constant CT Sensor Error of Slave2
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
Outdoor unit related error
86 Outdoor Unit
Test Run
Display Title Cause of Error
1
Instant Over Current(Peak) of Master Outdoor Unit PFC
732
Instant Over Current(Peak) of Slave1 Outdoor Unit PFC
3
Instant Over Current(Peak) of Slave2 Outdoor Unit PFC
1
Master Outdoor Unit R-T Phase Difference is over 5A
742
Slave1 Outdoor Unit R-T Phase Difference is over 5A
3
Slave2 Outdoor Unit R-T Phase Difference is over 5A
1 Master Outdoor Unit Fan CT Sensor open or short
752 Slave1 Outdoor Unit Fan CT Sensor open or short
3 Slave2 Outdoor Unit Fan CT Sensor open or short
1
Master Outdoor Unit Fan DC Link High Voltage Error
762
Slave1 Outdoor Unit Fan DC Link High Voltage Error
3
Slave2 Outdoor Unit Fan DC Link High Voltage Error
1
Master Outdoor Unit Fan Current is over 5A
772
Slave1 Outdoor Unit Fan is over 5A
3
Slave2 Outdoor Unit Fan is over 5A
1 Master Outdoor Unit Fan Hall Sensor open or Short
782 Slave1 Outdoor Unit Fan Hall Sensor open or Short
3 Slave2 Outdoor Unit Fan Hall Sensor open or Short
1 Master Outdoor Unit Fan First Position Sensing Failure
792 Slave1 Outdoor Unit Fan First Position Sensing Failure
3 Slave2 Outdoor Unit Fan First Position Sensing Failure
1
Communication Fail Between Master Outdoor Unit Main MICOM and
EEPROM or omitting EEPROM
862
Communication Fail Between Slave1 Outdoor Unit Main MICOM and
EEPROM or omitting EEPROM
3
Communication Fail Between Slave2 Outdoor Unit Main MICOM and
EEPROM or omitting EEPROM
1
Communication Fail Between Master Outdoor Unit Fan MICOM and
EEPROM or omitting EEPROM
872
Communication Fail Between Slave1 Outdoor Unit Fan MICOM and
EEPROM or omitting EEPROM
3
Communication Fail Between Slave2 Outdoor Unit Fan MICOM and
EEPROM or omitting EEPROM
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
Master Outdoor Unit 3 Phase Power unbal-
ance
Slave1 Outdoor Unit 3 Phase Power unbal-
ance
Slave2 Outdoor Unit 3 Phase Power unbal-
ance
Master Outdoor Unit Fan CT Sensor Error
Slave1 Outdoor Unit Fan CT Sensor Error
Slave2 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
Master Outdoor Unit Fan Over Current
Error
Slave1 Outdoor Unit Fan Over Current
Error
Slave2 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
Master Outdoor Unit Fan Start Failure Error
Slave1 Outdoor Unit Fan Start Failure Error
Slave2 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
Master Outdoor Unit Fan PCB EEPROM
Error
Slave1 Outdoor Unit Fan PCB EEPROM
Error
Slave2 Outdoor Unit Fan PCB EEPROM
Error
Outdoor unit related error
ENGLISH
Installation Manual 87
Display Title Cause of Error
1
Failing to receive Slave Unit signal at main PCB of Master Outdoor
Unit
1042
Failing to receive master and other Slave Unit signal at main PCB of
Slave1 Outdoor Unit
3
Failing to receive master and other Slave Unit signal at main PCB of
Slave2 Outdoor Unit
1
Failing to receive fan signal at main PCB of master unit.
1052
Failing to receive fan signal at main PCB of Slave1 unit.
3
Failing to receive fan signal at main PCB of Slave2 unit.
1 Instant Over Current at Master Outdoor Unit Fan IPM
1062 Instant Over Current at Slave1 Outdoor Unit Fan IPM
3 Instant Over Current at Slave2 Outdoor Unit Fan IPM
1
Master Outdoor Unit Fan DC Link Input Voltage is under 380V
1072
Slave1 Outdoor Unit Fan DC Link Input Voltage is under 380V
3
Slave2 Outdoor Unit Fan DC Link Input Voltage is under 380V
1
Liquid pipe temperature sensor of Master Outdoor Unit is open or
short
1132
Liquid pipe temperature sensor of slave1 Outdoor Unit is open or
short
3
Liquid pipe temperature sensor of slave2 Outdoor Unit is open or
short
1
Master Outdoor Unit Subcooling Inlet Temperature Sensor open or
short
1142
Slave1 Outdoor Unit Subcooling Inlet Temperature Sensor open or
short
3
Slave2 Outdoor Unit Subcooling Inlet Temperature Sensor open or
short
1
Master Outdoor Unit Subcooling Outlet Temperature Sensor open or
short
1152
Slave1 Outdoor Unit Subcooling Outlet Temperature Sensor open or
short
3
Slave2 Outdoor Unit Subcooling Outlet Temperature Sensor open or
short
1
Pressure unbalance between Outdoor Units
1512
Pressure unbalance between Outdoor Units
3
Pressure unbalance between Outdoor Units
1
Comp locking, Check Valve leakage, comp dielectric break down at
Master Outdoor Unit
1732
Comp locking, Check Valve leakage, comp dielectric at Slave1
Outdoor Unit
3
Comp locking, Check Valve leakage, comp dielectric at Slave2
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
Master Outdoor Unit Fan PCB
Communication Error
Slave1 Outdoor Unit Fan PCB
Communication Error
Slave2 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
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
Master Outdoor Unit Liquid pipe
Temperature Sensor Error
Slave1 Outdoor Unit Liquid pipe
Temperature Sensor Error
Slave2 Outdoor Unit Liquid pipe
Temperature Sensor Error
Master Outdoor Unit Subcooling Inlet
Temperature Sensor Error
Slave1 Outdoor Unit Subcooling Inlet
Temperature Sensor Error
Slave2 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
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
Master Outdoor Unit Constant Speed
Compressor Fault
Slave1 Outdoor Unit Constant Speed
Compressor Fault
Slave2 Outdoor Unit Constant Speed
Compressor Fault
Outdoor unit related error
Test Run
88 Outdoor Unit
Display Title Cause of Error
1
Master Outdoor Unit Fan Inverter PCB Temperature is Over 95°C
1932
Slave1 Outdoor Unit Fan Inverter PCB Temperature is Over 95°C
3
Slave2 Outdoor Unit Fan Inverter PCB Temperature is Over 95°C
1
Master Outdoor Unit Fan PCB Heat Sink Temperature Sensor open
or short
1942
Slave1 Outdoor Unit Fan PCB Heat Sink Temperature Sensor open
or short
3
Slave2 Outdoor Unit Fan PCB Heat Sink Temperature Sensor open
or short
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
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
Outdoor unit related error
ENGLISH
Installation Manual 89
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.
n Limiting concentration
Check limiting concentration along following steps and take appropriate measure depending on the situation.
n Calculate amount of all the replenished refrigerant (lb) per each refrigerant
system.
n 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 with-
out hurting human body when refrigerant leaks in the air. The limiting concentration shall be described in the
unit of lb/ft
3
(Freon gas weight per unit air volume) for facilitating calculation.
Limiting concentration: 0.028 lb/ft
3
(R410A)
Outdoor unit
(No.1 system)
Flow of
refrigerant
Indoor unit
Room where refrigerant leaks
(Refrigerant of the whole No.1
system flows out.)
Amount of additional
replenished refrigerant
Total amount of replenished
refrigerant in refrigerant
facility (lb)
+
=
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
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)
Amount of replenished
refrigerant per one outdoor
unit system
Amount of replenished
refrigerant at factory shipment
Amount of additionally
replenished refrigerant
depending on piping
length or piping
diameter at customer
90 Outdoor Unit
Caution For Refrigerant Leak
(3) With partition and without opening which serve as passage of air to adjoining room
n Calculate refrigerant concentration
n 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
(R410A)
=
Refrigerant concentration
(lb/ft
3
)
Total amount of replenished
refrigerant in refrigerant facility (lb)
Capacity of smallest room where
indoor unit is installed (ft
3
)
In case the result of calculation exceeds
the limiting concentration, perform the
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
Countermeasure 1
Opening effective to ventilation
Indoor unit
ENGLISH
Installation Manual 91
Installation guide at the seaside
Installation guide at the seaside
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 malfunc-
tion 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.
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
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.
3) Select a well-drained place.
• 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 27.6 inch of space
between outdoor unit and the windbreak for easy
air flow.
Sea wind Sea wind
Sea wind
Windbreak
CAUTION
92 Outdoor Unit
US
1. Please call the installing contractor of your product, as warranty service will be provided by them.
2. If you have service issues that have not been addressed by the contractor, please call 1-888-865-3026.
CANADA
Service call Number # : (888) LG Canada, (888) 542-2623
