Fujitsu Airstage VR-II AAUA48TLAV User manual

PART NO. 9373870166-03
English
INSTALLATION MANUAL
INDOOR UNIT (Outdoor air unit)
For authorized service personnel only.
Français
MANUEL D’INSTALLATION
APPAREIL INTÉRIEUR (Unité d’air extérieur)
Pour le personnel agréé uniquement.
AAUA48TLAV
AAUA72TLAV
Español
MANUAL DE INSTALACIÓN
UNIDAD INTERIOR (unidad de aire exterior)
Únicamente para personal de servicio autorizado.
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1. SAFETY PRECAUTIONS
1.1. IMPORTANT! Please read before starting
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.
For safe installation and trouble-free operation, you must:
• Carefully read this instruction booklet before beginning.
• Follow each installation or repair step exactly as shown.
• Observe all local, state, and national electrical codes.
• Pay close attention to all danger, warning, and caution notices given in this manual.
WARNING:
This symbol refers to a hazard or unsafe practice which can result
in severe personal injury or death.
CAUTION:
This symbol refers to a hazard or unsafe practice which can result
in personal injury and the potential for product or property damage.
• Hazard alerting symbols
Electrical
Safety/alert
If Necessary, Get Help
These instructions are all you need for most installation sites and maintenance conditions.
If you require help for a special problem, contact our sales/service outlet or your certified
dealer for additional instructions.
In Case of Improper Installation
The manufacturer shall in no way be responsible for improper installation or maintenance
service, including failure to follow the instructions in this document.
1.2. SPECIAL PRECAUTIONS
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 wir-
ing diagram and these instructions when wiring. Improper connections and inadequate
earthing (grounding) can cause accidental injury or death.
• Earth (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 fingers.
When Installing...
...In a Ceiling or Wall
Make sure the ceiling/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 drip-
ping and water damage to walls and floors.
...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-type Systems)
Install the outdoor unit on a raised platform that is higher than drifting snow.
When Connecting Refrigerant Tubing
• Keep all tubing runs as short as possible.
• Use the flare method for connecting tubing.
• Apply refrigerant lubricant to the matching surfaces of the flare and union tubes before
connecting them, then tighten the nut with a torque wrench for a leak-free connection.
• Check carefully for leaks before opening the refrigerant valves.
When Servicing
• Turn the power OFF at the main circuit breaker panel 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.
• After installation, explain correct operation to the customer, using the operating manual.
DANGER
Never touch electrical components immediately after the power supply has been
turned off. Electrical shock may occur. After turning off the power, always wait 5 min-
utes or more before touching electrical components.
INSTALLATION MANUAL
PART NO. 9373870166-03
VRF system indoor unit (Outdoor air unit)
Contents
1. SAFETY PRECAUTIONS............................................................................................ 1
1.1. IMPORTANT! Please read before starting............................................................ 1
1.2. SPECIAL PRECAUTIONS.................................................................................... 1
2. ABOUT THIS PRODUCT............................................................................................. 2
2.1. Precautions for using R410A refrigerant .................................................................. 2
2.2. Special tool for R410A.......................................................................................... 2
2.3. Accessories .......................................................................................................... 2
2.4. Optional parts ....................................................................................................... 3
2.5. About unit of the length......................................................................................... 3
3. INSTALLATION WORK ............................................................................................... 3
3.1. Selecting an installation location .......................................................................... 3
3.2. Installation dimension ........................................................................................... 3
3.3. Installing the unit................................................................................................... 3
4. PIPE INSTALLATION .................................................................................................. 4
4.1. Selecting the pipe material ................................................................................... 5
4.2. Pipe requirement .................................................................................................. 5
4.3. Pipe connection [Flaring: For 48 type].................................................................. 5
4.4. Pipe connection [Brazing: For 72 type]................................................................. 6
4.5. Installing heat insulation [Flaring: For 48 type] ..................................................... 6
4.6. Installing heat insulation [Brazing: For 72 type].................................................... 6
5. INSTALLING DRAIN PIPES........................................................................................ 7
6. ELECTRICAL WIRING ................................................................................................ 8
6.1. Electrical requirement........................................................................................... 8
6.2. Wiring method ...................................................................................................... 8
6.3. Unit wiring............................................................................................................. 9
6.4. Connection of wiring ............................................................................................ 9
6.5. External input and external output (Optional parts) ............................................ 10
6.6. IR receiver unit (Optional parts).......................................................................... 12
7. FIELD SETTING........................................................................................................ 13
7.1. Setting the address............................................................................................. 13
7.2. Fan delay setting ................................................................................................ 14
7.3. Function setting .................................................................................................. 14
8. TEST RUN................................................................................................................. 14
8.1. Test run using Outdoor unit (PCB)...................................................................... 14
8.2. Test run using remote controller ......................................................................... 14
9. CHECK LIST.............................................................................................................. 15
10. INDICATOR LAMP STATUS...................................................................................... 15
11. ERROR CODES........................................................................................................ 15
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• Be sure to read this Manual thoroughly before installation.
• The warnings and precautions indicated in this Manual contain important information
pertaining to your safety. Be sure to observe them.
• Hand this Manual, together with the Operating Manual, to the customer. Request the
customer to keep them on hand for future use, such as for relocating or repairing the unit.
WARNING
Request your dealer or a professional installer to install the indoor unit in accordance
with this Installation Manual. An improperly installed unit can cause serious accidents
such as water leakage, electric shock, or fire. If the indoor unit is installed in disregard
of the instructions in the Installation Manual, it will void the manufacturer’s warranty.
Do not turn ON the power until all work has been completed. Turning ON the power
before the work is completed can cause serious accidents such as electric shock or
fire.
If refrigerant leaks while work is being carried out, ventilate the area. If the refrigerant
comes in contact with a flame, it produces a toxic gas.
Installation must be performed in accordance with the requirement of NEC (National
Electrical Code) and CEC (Canadian Electrical Code) by authorized personnel only.
Except for EMERGENCY, never turn off main as well as sub breaker of the indoor
units during operation. It will cause compressor failure as well as water leakage.
First, stop the indoor unit by operating the control unit, converter or external input
device and then cut the breaker.
Make sure to operate through the control unit, converter or external input device.
When the breaker is designed, locate it at a place where the users cannot start and
stop in the daily work.
2. ABOUT THIS PRODUCT
2.1. Precautions for using R410A refrigerant
WARNING
Do not introduce any substance other than the prescribed refrigerant into the
refrigeration cycle. If air enters the refrigeration cycle, the pressure in the refrigeration
cycle will become abnormally high and cause the piping to rupture.
If there is a refrigerant leak, make sure that it does not exceed the concentration limit.
If a refrigerant leak exceeds the concentration limit, it can lead to accidents such as
oxygen starvation.
Do not touch refrigerant that has leaked from the refrigerant pipe connections or other
area. Touching the refrigerant directly can cause frostbite.
If a refrigerant leak occurs during operation, immediately vacate the premises and
thoroughly ventilate the area. If the refrigerant comes in contact with a flame, it
produces a toxic gas.
2.2. Special tool for R410A
WARNING
To install a unit that uses R410A refrigerant, use dedicated tools and piping materials
that have been manufactured specifically for R410A use. Because the pressure
of R410A refrigerant is approximately 1.6 times higher than the R22, failure to
use dedicated piping material or improper installation can cause rupture or injury.
Furthermore, it can cause serious accidents such as water leakage, electric shock, or
fire.
Tool name Changes
Gauge manifold
The pressure in the refrigerant system is extremely
high and cannot be measured with a conventional
(R22) gauge. To prevent erroneous mixing of other
refrigerants, the diameter of each port has been
changed. It is recommended to use a gauge manifold
with a high pressure display range of 30 in Hg to
768 psi (–0.1 to 5.3 MPa) and a low pressure display
range of 30 in Hg to 551 psi (–0.1 to 3.8 MPa).
Charging hose
To increase pressure resistance, the hose material and
base size were changed.
(The charging port thread diameter for R410A is 1/2 UNF
20 threads per inch.)
Vacuum pump
A conventional (R22) vacuum pump can be used by
installing a vacuum pump adapter.
Be sure that the pump oil does not backflow into the
system. Use one capable for vacuum suction of 5 Torr,
–755 mmHg (–100.7 kPa).
Gas leakage detector Special gas leakage detector for R410A refrigerant.
2.3. Accessories
WARNING
For installation purposes, be sure to use the parts supplied by the manufacturer or
other prescribed parts. The use of non-prescribed parts can cause serious accidents
such as the unit falling, water leakage, electric shock, or fire.
The following installation parts are furnished. Use them as required.
Keep the Installation Manual in a safe place and do not discard any other accessories
until the installation work has been completed.
Name and Shape Q’ty Application
Operating manual
1
Installation manual
1
(This book)
Cable tie (Large)
4
For fixing the coupler heat
insulation
Cable tie (Medium)
2
For transmission and remote con-
troller cable binding
Coupler heat insulation (Small)
1
For indoor side pipe joint (Small)
Coupler heat insulation (Large)
1
For indoor side pipe joint (Large)
Special nut A
(Large flange)
4
For suspending the indoor unit
from ceiling
Special nut B
(Small flange) 4
Washer
8
Drain hose
2
For installing drain pipe
Hose band
2
For installing drain hose
Drain hose insulation
2
For installing drain hose
External input wire
(White)
1
For control input function
(External fan speed control,
CNA06)
For apply voltage terminal.
External input wire
(Red)
1
For control input function
(External fan speed control,
CNA07)
For dry contact terminal.
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2.4. Optional parts
The following options are available.
Description Model Application
External connect kit
UTY-XWZXZC For output function
(Output terminal / CNB01)
UTY-XWZXZB For control input function
(Apply voltage terminal / CNA01)
UTY-XWZXZD For control input function
(Dry contact terminal / CNA02)
UTY-XWZXZ7 For forced thermostat off function
(Apply voltage terminal / CNA03)
UTY-XWZXZE For forced thermostat off function
(Dry contact terminal / CNA04)
IR receiver unit UTB-*WC For the wireless remote controller.
When installing, please refer to the installation manual of each optional part.
2.5. About unit of the length
All Fujitsu General products are manufactured to metric units and tolerances. United
States customary units are provided for reference only.
In cases where exact dimensions and tolerances are required, always refer to metric units.
3. INSTALLATION WORK
Correct initial installation location is important because it is difficult to move unit after it is
installed.
48 type 72 type
Installation requirements will be explained with illustrations using the 72 type as
reference.
3.1. Selecting an installation location
Decide the mounting position together with the customer as follows.
WARNING
Select installation locations that can properly support the weight of the indoor unit.
Install the units securely so that they do not topple or fall.
CAUTION
Do not install the indoor unit in the following areas:
• Area with high salt content, such as at the seaside. It will deteriorate metal parts,
causing the parts to fail or the unit to leak water.
• Area filled with mineral oil or containing a large amount of splashed oil or steam,
such as a kitchen. It will deteriorate plastic parts, causing the parts to fail or the unit
to leak water.
• Area that generates substances that adversely affect the equipment, such as sulfuric
gas, chlorine gas, acid, or alkali. It will cause the copper pipes and brazed joints to
corrode, which can cause refrigerant leakage.
• Area that can cause combustible gas to leak, contains suspended carbon fibers or
flammable dust, or volatile inflammables such as paint thinner or gasoline. If gas
leaks and settles around the unit, it can cause a fire.
• Area where animals may urinate on the unit or ammonia may be generated.
Do not use the unit for special purposes, such as storing food, raising animals,
growing plants, or preserving precision devices or art objects.
It can degrade the quality of the preserved or stored objects.
Do not install where there is the danger of combustible gas leakage.
Do not install the unit near a source of heat, steam, or flammable gas.
Install the unit where drainage does not cause any trouble.
Install the indoor unit, power supply cable, transmission cable, and remote controller
cable at least 40 in (1 m) away from a television or radio receivers. The purpose of this
is to prevent TV reception interference or radio noise. (Even if they are installed more
than 40 in (1 m) apart, you could still receive noise under some signal conditions.)
If children under 10 years old may approach the unit, take preventive measures so
that they cannot reach the unit.
Take precautions to prevent the unit from falling.
(1)
Install the indoor unit on a place having a sufficient strength so that it withstands
against the weight of the indoor unit.
(2) The inlet and outlet ports should not be obstructed; the air should be able to blow all
over the room.
(3) Leave the space required to service the air conditioner.
(4) Install the unit where connection to the outdoor unit (or RB unit) is easy.
(5) Install the unit where the connection pipe can be easily installed.
(6) Install the unit where the drain pipe can be easily installed.
(7) Install the unit where noise and vibrations are not amplified.
(8) Take servicing, etc., into consideration and leave the spaces. Also install the unit
where the filter can be removed.
(9) Do not install the unit where it will be exposed to direct sunlight.
3.2. Installation dimension
3.2.1. Installation by which service space is made on top of the unit
(recommended)
Install the unit away from the ceiling by 18 in (450 mm) or more.
18 (450)
or more
99 (2500) or more
(When no ceiling)
Service
space
Unit: in (mm) Service access
24 (600) or more
Floor
3.2.2. Installation by which service is carried out from the bottom of
the unit
1 (20)
or more Service
space
Unit: in (mm) Service access
24 (600) or more
3.2.3. (For maintenance)
(1) Maintenance work of the control box is possible with the Service access of the
measurement shown in the figure.
(2) If maintenance work is to be done from the bottom side, the Service access needs to
be larger than the outside dimension of the indoor unit.
(3) If maintenance work is to be done from the top, keep the space of the more than 18 in
(450 mm) between the indoor unit and ceiling.
32 (800) or more
20 (500) or more
49-3/4 (1264) 24 (600)
or more
8 (200) or more
Service access size of 3.2.2
Indoor unit
[Top view]
Unit : in (mm)
Service access size of 3.2.1
2 (30)
or more
3.3. Installing the unit
WARNING
Install the air conditioner in a location which can withstand a load of at least 5 times
the weight of the main unit and which will not amplify sound or vibration. If the
installation location is not strong enough, the indoor unit may fall and cause injuries.
If the job is done with the panel frame only, there is a risk that the unit will come loose.
Please take care.
Carrying in and installation of the unit should be performed by a sufficient number of
people and with sufficient equipment that is adequate for the weight of the unit. Per-
forming such work by an insufficient number of people or with inadequate equipment
could result in dropping of the unit or personal injury.
CAUTION
Confirm the directions of the air intake and outlet before installing the unit.
The unit takes in air from the evaporator side, and expels it from the fan side.
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The side of the unit that holds the drain port A should be slightly lower than the opposite
side of the unit B. The slant should allow from 0 to 13/16 in (0 to 20 mm) of difference
between A and B.
BA
(Side)
Level
Main drain portSafty drain port
The side of the unit that holds the drain port A should be slightly lower than the opposite
side of the unit B. The slant should allow from 0 to 3/8 in (0 to 10 mm) of difference
between A and B.
3.3.4. Mounting the duct
Follow the procedure in the following figure to install the ducts.
Unit: in (mm)
49-3/4 (1264)
41-13/16 (1062)
36-1/4 (921)
4-3/16
(106)
9/16
(14)
13-13/16
(351) 3/4
(19)
1-15/16
(49)
1-3/16
(30) 11-15/16 (304)
6 (152)
CAUTION
To prevent people from touching the parts inside the unit, be sure to install grilles on
the inlet and outlet ports. The grilles must be designed in such a way that cannot be
removed without tools.
The static pressure outside the unit is as follows.
AAUA48TLAV: 0.20 to 0.74 in WG (50 to 185 Pa)
AAUA72TLAV: 0.20 to 0.80 in WG (50 to 200 Pa)
If an intake duct is installed, take care not to damage the temperature sensor (the
temperature sensor is attached to the intake port flange).
Unit
Duct (locally purchased)
Outlet grille
(locally
purchased)
Insulation
(locally purchased)
(Air)
Hood
(locally purchased)
Outer wall
Air Inlet
Room
• A net is affixed to the air inlet to prevent biological invasion (locally purchased).
• The duct on the air inlet should be inclined to prevent rainwater from entering into the
inside of this unit.
• An air filter is not included with this unit. When constructing the duct, install an air filter
(locally purchased) at the appropriate position on the air inlet side. The air filter should
have a rating of no less than MERV 8.
• To prevent condensation , heat insulation must be performed on the duct.
Be sure to install the air filter in the air inlet. If the air filter is not installed, the heat
exchanger may be clogged and its performance may decrease.
4. PIPE INSTALLATION
CAUTION
Be more careful that foreign matter (oil, water, etc.) does not enter the piping than with
refrigerant R410A models. Also, when storing the piping, securely seal the openings
by pinching, taping, etc.
While welding the pipes, be sure to blow dry nitrogen gas through them.
3.3.1. Conveyance method
• Leave the packing materials on until the unit is at the installation site.
• Remove the packing hardware and dispose of it.
• Be careful not to dispose the accessories.
Unit is packed upside down.
Fan holder (2 locations) Pull them out towards you.
3.3.2. Installing hangers
Suspend the indoor unit by referring to the following figures.
Inlet port
Outlet port
AIR
AIR AIR
49-3/4 (1264)
46-15/16 (1192)
20-11/16 (526)
23-1/16 (586)
7-1/8
(181)
Unit: in (mm)
Hanging bolt M10
(locally purchased)
Special nut A (Large)
(accessories)
Washer
(accessories)
Special nut B (Small)
(accessories)
Hanger
CAUTION
Fasten the unit securely with special nuts A and B.
3.3.3 Leveling
Use the procedure in the following figure to adjust the levelness.
BA
Level
Safty drain port
(Front)
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4.1. Selecting the pipe material
CAUTION
Do not use existing pipes from another refrigeration system or refrigerant.
Use pipes that have clean external and internal sides without any contamination which
may cause trouble during use, such as sulfur, oxide, dust, cutting waste, oil, or water.
It is necessary to use seamless copper pipes.
Material : Phosphor deoxidized seamless copper pipes
It is desirable that the amount of residual oil is less than 0.04 oz. /100 ft (40 mg /10 m).
Do not use copper pipes that have a collapsed, deformed, or discolored portion
(especially on the interior surface). Otherwise, the expansion valve or capillary tube
may become blocked with contaminants.
Improper pipe selection will degrade performance. As an air conditioner using R410A
incurs pressure higher than when using conventional (R22) refrigerant, it is necessary
to choose adequate materials.
• Thicknesses of copper pipes used with R410A are as shown in the table.
• Never use copper pipes thinner than those indicated in the table even if they are
available on the market.
Thicknesses of Annealed Copper Pipes (R410A)
Pipe outside diameter [in (mm)] Thickness [in (mm)] Material
1/4 (6.35) 0.032 (0.80)
COPPER
JIS H3300 C1220T-O
or equivalent
3/8 (9.52) 0.032 (0.80)
1/2 (12.70) 0.032 (0.80)
5/8 (15.88) 0.039 (1.00)
3/4 (19.05) 0.047 (1.20)
7/8 (22.22) 0.039 (1.00)
COPPER
JIS H3300 C1220T-H
or equivalent
4.2. Pipe requirement
CAUTION
Refer to the Installation Manual of the outdoor unit for description of the length of
connecting pipe or for difference of its elevation.
• Use pipe with water-resistant heat insulation.
CAUTION
Install heat insulation around both the gas and liquid pipes. Failure to do so may
cause water leaks. Use heat insulation with heat resistance above 248°F (120°C).
(Reverse cycle model only)
In addition, if the humidity level at the installation location of the refrigerant piping is
expected to exceed 70 %, install heat insulation around the refrigerant piping. If the
expected humidity level is 70 to 80 %, use heat insulation that is 9/16 in (15 mm)
or thicker and if the expected humidity exceeds 80 %, use heat insulation that is
13/16 in (20 mm) or thicker. If heat insulation is used that is not as thick as specified,
condensation may form on the surface of the insulation.
In addition, use heat insulation with heat conductivity of 0.045 W/(m·K) or less (at
68°F (20°C)).
4.3. Pipe connection [Flaring: For 48 type]
WARNING
Tighten the flare nuts with a torque wrench using the specified tightening method.
Otherwise, the flare nuts could break after a prolonged period, causing refrigerant to
leak and generate a hazardous gas if the refrigerant comes into contact with a flame.
4.3.1. Flaring
Use special flare tool exclusive for R410A.
(1) Cut the connection pipe to the necessary length with a pipe cutter.
(2) Hold the pipe downward so that cuttings will not enter the pipe and remove any burrs.
(3) Insert the flare nut (always use the flare nut attached to the indoor and respectively)
onto the pipe and perform the flare processing with a flare tool. Use the outdoor units
(or RB unit) special R410A flare tool, Leakage of refrigerant may result if other flare
nuts are used.
(4) Protect the pipes by pinching them or with tape to prevent dust, dirt, or water from
entering the pipes.
L
Check if [L] is flared uniformly and
is not cracked or scratched.
Die
Pipe
A
B
Pipe outside diameter
[in (mm)]
Dimension A [in (mm)] Dimension B 0 (0)
-0.015 (-0.4)
[in (mm)]
Flare tool for R410A,
clutch type
1/4 (6.35)
0 to 0.020
(0 to 0.5)
3/8 (9.1)
3/8 (9.52) 1/2 (13.2)
1/2 (12.70) 5/8 (16.6)
5/8 (15.88) 3/4 (19.7)
3/4 (19.05) 15/16 (24.0)
When using conventional (R22) flare tools to flare R410A pipes, the dimension A should
be approximately 0.02 in (0.5 mm) more than indicated in the table (for flaring with R410A
flare tools) to achieve the specified flaring. Use a thickness gauge to measure the dimen-
sion A. It is recommended that a R410A flaring tool is used.
Width across
flats
Pipe outside diameter
[in (mm)]
Width across flats of Flare
nut [in (mm)]
1/4 (6.35) 11/16 (17)
3/8 (9.52) 7/8 (22)
1/2 (12.70) 1 (26)
5/8 (15.88) 1-1/8 (29)
3/4 (19.05) 1-7/16 (36)
4.3.2. Bending pipes
• The pipes are shaped by your hands or pipe bender. Be careful not to collapse them.
• Do not bend the pipes in an angle more than 90°.
• When pipes are repeatedly bend or stretched, the material will harden, making it difficult
to bend or stretch them any more. Do not bend or stretch the pipes more than 3 times.
CAUTION
To prevent breaking of the pipe, avoid sharp bends.
If the pipe is bent repeatedly at the same place, it will break.
4.3.3. Pipe connection
CAUTION
Be sure to apply the pipe against the port on the indoor unit correctly. If the centering
is improper, the flare nut cannot be tightened smoothly. If the flare nut is forced to turn,
the threads will be damaged.
Do not remove the flare nut from the indoor unit pipe until immediately before connect-
ing the connection pipe.
Do not use mineral oil on flared part. Prevent mineral oil from getting into the system
as this would reduce the lifetime of the units.
(1) Detach the caps and plugs from the pipes.
(2) Centering the pipe against port on the indoor unit, turn the flare nut with your hand.
Flare nut
Flare nut
Connection pipe
(Gas pipe)
Connection pipe
(Liquid pipe)
(3) When the flare nut is tightened properly by your hand, hold the body side coupling with
a separate spanner, then tighten with a torque wrench. (See the table below for the
flare nut tightening torques.)
CAUTION
Hold the torque wrench at its grip, keeping it in the right angle with the pipe, in order to
tighten the flare nut correctly.
Tighten the flare nuts with a torque wrench using the specified tightening method. Oth-
erwise, the flare nuts could break after a prolonged period, causing refrigerant to leak
and generate a hazardous gas if the refrigerant comes into contact with a flame.
Tighten with 2 wrenches.
Holding Wrench
Flare nut
Connection pipe
Indoor unit pipe
(Body side)
Torque wrench
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Flare nut [in (mm)] Tightening torque [lbf·ft (N·m)]
1/4 (6.35) dia. 11.8 to 13.3 (16 to 18)
3/8 (9.52) dia. 23.6 to 31.0 (32 to 42)
1/2 (12.70) dia. 36.1 to 45.0 (49 to 61)
5/8 (15.88) dia. 46.5 to 55.3 (63 to 75)
3/4 (19.05) dia. 66.4 to 81.1 (90 to 110)
4.4. Pipe connection [Brazing: For 72 type]
• The gas and liquid pipes connections must be brazed.
• Be sure to braze them before performing any wiring work or installing the drain pipe.
Outer diameter of pipe
Connection Pipe (Liquid) 1/2 in (12.70 mm)
Connection Pipe (Gas) 7/8 in (22.22 mm)
Connection Pipe
(Gas pipe)
Connection Pipe
(Liquid pipe)
WARNING
Be sure to use wet cloth, etc., to protect the pipe rubber, pipe heat insulation, and
the heat insulation of the safety drain pan as shown below. Because these parts are
extremely flammable, they can cause a fire if they are not properly protected.
The heat exchanger contains a thermistor.
Protect these areas with wet cloth, etc.
Completely cover the pipe rubber
and pipe heat insulation with wet
cloth, etc., to prevent them from
burning.
Pipe heat insulation
Brazing
Pipe heat insulation
Do not expose the unit (control box, rear panel, maintenance panel, etc.) and the inlet
grille to the flame. The exposure of these parts to the flame will adversely affect their
appearance and functions or cause a fire.
CAUTION
If air or another type of refrigerant enters the refrigeration cycle, the internal pressure
in the refrigeration cycle will become abnormally high and prevent the unit from
exerting its full performance.
Apply nitrogen gas while
brazing the pipes. Nitrogen
gas pressure:
2.9 psi (0.02 MPa) (= pres-
sure felt sufficiently on the
back of your hand)
Pressure regulating valve
Cap
Nitrogen gas
Brazing area
If a pipe is brazed without applying nitrogen gas, it will create an oxidation film.
This can degrade performance or damage the parts in the unit (such as the
compressor or valves).
Do not use flux to braze pipes. If the flux is the chlorine type, it will cause the pipes to
corrode. Furthermore, if the flux contains fluoride, it will adversely affect the refrigerant
pipe system such as by degrading the refrigerant oil.
For brazing material, use phosphor copper that does not require flux.
4.5. Installing heat insulation [Flaring: For 48 type]
Install the heat insulation material after performing a refrigerant leak check (see the
Installation Manual for the outdoor unit for details).
• Insulate with the coupler heat insulation (Accessories) around the gas pipe and liquid pipe
at indoor unit.
• After installing the coupler heat insulation, wrap both ends with vinyl tape so that there is
no gap.
• After affixing the coupler heat insulation, secure it with 2 cable tie (large), one on each
end of the insulation.
• Make sure that the cable tie overlap the heat insulation pipe.
Coupler heat
insulation
(Accessories) Cover this portion with
heat insulation.
Heat insulationCable tie (Large)
(Accessories)
CAUTION
After checking for gas leaks (refer to the Installation Manual of the outdoor unit),
perform this section.
Install heat insulation around both the large (gas) and small (liquid) pipes. Failure to
do so may cause water leaks.
4.6. Installing heat insulation [Brazing: For 72 type]
• Install the coupler heat insulation after completing the refrigerant leak check (for details,
refer to the Installation Manual for the outdoor unit).
• There should be no gaps between the insulation and the product.
Cable tie (Large)
(Accessories)
No gap
No gap
Cable tie (Large)
(Accessories)
Coupler heat
insulation (Large)
(Accessories)
Coupler heat
insulation (Small)
(Accessories)
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5. INSTALLING DRAIN PIPES
• Use general hard polyvinyl chloride pipe ø 3/4 in [I.D.], ø 1-1/16 in [O.D.] and connect it
with adhesive (polyvinyl chloride) so that there is no leakage.
• The position of the installed drain pipe should have a downward gradient of 1/100 or
more.
• To prevent the pipe from freezing, use a heat insulation material as needed.
Position of drain piping
Main drain port
5-3/4(146)
1-1/8 (28)
15-1/16 (382)
15-3/4 (400)
Safety drain port
Pipe size
Drain pipe
• For main drain port
• For safety drain port
Φ3/4 in (19 mm) [I.D.],
Φ1-1/16 in (27 mm) [O.D.]
• This product has drain ports in 2 locations. Follow the procedure in the figure to connect
drain hose and drain pipes to each of them.
Install the drain hose to the main and safety drain port
Working procedure
(1) Install the attached drain hose to the main and safety drain port of the body. Install
the hose band from the top of the hose within the graphic display area. Secure firmly
with the hose band.
(2) Use vinyl adhesive agent to glue the drain piping (PVC pipe) [Φ3/4 in (19 mm) I.D.
Φ1-1/16 in (27 mm) O.D.] which is prepared on site or piping socket. (Apply color
adhesive agent evenly until the gauge line and seal)
(3) Check the drainage.
(4) Install the heat insulation.
(5) Use the attached heat insulation to insulate the drain port and band parts of the body.
Unit: in (mm)
Drain pan
Ensure there is no space
Hose Band
(accessories)
Soft PVC side
Drain hose
(accessories)
3/8 to 9/16
(10 to 15)
Applying
area of
adhesive
Hard PVC side Joint pipe
(locally purchased)
Drain pipe (locally purchased)
Φ3/4 (19) [I.D.], Φ1-1/16 (27) [O.D.]
Unit: in (mm)
0.16 (4) or less
Wrap the Drain hose insulation around the drain hose connection.
Drain pan
Drain hose insulation
(accessories)
Drain hose
3-15/16
(100)
Hose opening view
Wind the attached heat insulation
around the hose band. Make sure
the alignment is on top.
After installing the Drain hose, check if the drainage is smooth.
Downward gradient
0.10 to 0.19 in
(2.5 to 5.0 mm)
GOOD PROHIBITED
Install the drain pipe
1Main drain
On the main drain, provide 1 trap near the indoor unit.
Trap
H2H1
H1= 3-15/16 in (100 mm) (Approx.)
H2= 1-15/16 to 3-15/16 in (50 to 100 mm)
Unit
Drain pipe (Main)
2Safety drain
There is no need to provide a trap for the safety drain. If the safety drain is connected
to the main drain, make the connection below the main trap.
Drain pipe (Main)
Unit
Drain pipe (Safety)
• Make sure that drain pipe is installed without rises.
• Do not perform air bleeding.
Rise
Air bleeding
Rise
PROHIBITED
CAUTION
Be sure to properly insulate the drain pipes.
Make sure the drain water is properly drained.
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6. ELECTRICAL WIRING
WARNING
Electrical work must be performed in accordance with this Manual by a person certified
under the national or regional regulations. Be sure to use a dedicated circuit for the unit.
An insufficient power supply circuit or improperly performed electrical work can cause
serious accidents such as electric shock or fire.
Before starting work, check that power is not being supplied to the all units.
Use the included connection cables and power cables or ones specified by the
manufacturer. Improper connections, insufficient insulation, or exceeding the allowable
current can cause electric shock or fire.
For wiring, use the prescribed type of cables, connect them securely, making sure
that there are no external forces of the cables applied to the terminal connections.
Improperly connected or secured cables can cause serious accidents such as
overheating the terminals, electric shock, or fire.
Do not modify the power cables, use extension cables, or use any branches in the
wiring. Improper connections, insufficient insulation, or exceeding the allowable
current can cause electric shock or fire.
Match the terminal board numbers and connection cable colors with those of the
outdoor unit (or RB unit). Erroneous wiring may cause burning of the electric parts.
Securely connect the connection cables to the terminal board. In addition, secure the
cables with wiring holders. Improper connections, either in the wiring or at the ends of
the wiring, can cause a malfunction, electric shock, or fire.
Always fasten the outside covering of the connection cable with the cable clamp. (If
the insulator is chafed, electric discharge may occur.)
Securely install the electrical box cover on the unit. An improperly installed electrical
box cover can cause serious accidents such as electric shock or fire through exposure
to dust or water.
Install sleeves into any holes made in the walls for wiring. Otherwise, a short circuit
could result.
We suggest installing GFEB breakers or follow local electrical code.
When installing this system, install using ground fault equipment breakers (GFEB) to
reduce the risk of leaking current which result in electric shock or potential fire.
Always connect the earth (ground) cable.
Improper earthing (grounding) work can cause electric shocks.
Install the remote controller cables so as not to be direct touched with your hand.
Perform wiring work in accordance with standards so that the air conditioner can be
operated safely and positively.
Connect the connection cable firmly to the terminal board. Imperfect installation may
cause a fire.
If the supply cable is damaged, it must be replaced by the manufacturer, its service
agent or similarly qualified persons in order to avoid a hazard.
CAUTION
Earth (Ground) the unit.
Do not connect the earth (ground) cable to a gas pipe, water pipe, lightning rod, or a
telephone earth (ground) cable.
Improper earthing (grounding) may cause electric shock.
Do not connect power supply cables to the transmission or remote controller terminals,
as this will damage the product.
Never bundle the power supply cable and transmission cable, remote controller cable
together.
Separate these cable by 2 in (50 mm) or more.
Bundling these cables together will cause miss operation or breakdown.
When handling PCB, static electricity charged in the body may cause malfunction of
the PCB. Follow the cautions below:
• Establish an earth (ground) for the indoor and outdoor units and peripheral devices.
• Cut power (breaker) off.
• Touch metal part of the indoor unit for more than 10 seconds to discharge static
electricity charged in the body.
• Do not touch terminals of parts and patterns implemented on PCB.
6.1. Electrical requirement
Voltage rating
208 / 230 V
Operating range
187 to 253 V
• Select the power cable type and size in accordance with relevant local and national
regulations.
• Specifications for local wiring power cord and branch wiring are in compliance with local
code.
• Select the correct cable type and size according to the country or region’s regulations.
• Max. wire length: Set a length so that the voltage drop is less than 2%. Increase the wire
diameter when the wire length is long.
Breaker should be installed at every refrigerant system. Do not use a breaker in a different
refrigerant system.
Refer to the table for the breaker specifications of each installation condition. Perform
the power crossover wiring within the range of the same refrigerant system. When the
crossover wiring is done, make a connection for indoor units to satisfy conditions A and B
below.
A. Current breaker requirements
Model MCA MAX. CKT. BKR (Fuse capacity)
AAUA48TLAV 1.68 A 15 A
AAUA72TLAV 2.60 A
MCA: Minimum Circuit Ampacity
MAX. CKT. BKR : Maximum Circuit Breaker
When the power crossover wiring is done, make it so that the total of the MCA of the
connected RB units and indoor units does not exceed the 11 A. For RB unit MCA, refer to
the RB unit installation manual.
If the capacity of connected RB units and indoor units exceeds the upper limit, either add
breakers or use a breaker with a greater capacity.
B. Ground Fault Equipment Breaker requirements
When the Outdoor air unit is connected, select the Ground fault equipment breaker based
on the following formula and table.
• 2 indoor units (including RB unit) = 1 Outdoor air unit
Breaker capacity * Maximum connectable
“indoor units” or “indoor units + RB units”
30 mA, 0.1 sec or less 36 or less
100 mA, 0.1 sec or less 37 to 121 **
* Heat pump type: indoor units, Heat recovery type: indoor units and RB units.
** If the 100 mA capacity breaker is not provided, split the quantity of the indoor units into
small groups of 36 units or less and provide a breaker with capacity of 30 mA for each
group.
6.1.1. Cable specifications
Cable size Wire type Remarks
Transmission cable 22 AWG
(0.33 mm²)
LEVEL 4 (NEMA)
non-polar 2core,
twisted, shielded pair,
solid core, diameter
0.026 in (0.65mm)
LONWORKS ®
compatible cable
Remote controller
cable
(2-wire type)
22AWG to 16AWG
(0.33 to 1.25 mm²) Sheathed PVC cable Non polar 2 core, twisted pair
18AWG Thermostat cable
2 core
Use sheathed non
twisted pair cable
Remote controller
cable
(3-wire type)
22 AWG
(0.33 mm²) Sheathed PVC cable Polar 3 core
6.2. Wiring method
EXAMPLE
Breaker 1: Ground Fault Equipment
Breaker (GFEB)
Breaker 2: Maximum Circuit Breaker
(MAX. CKT. BKR)
Breaker shall be located in sight from and readily accessible from all indoor units.
*1: When connecting to the Heat Recovery System, refer to the installation manual of the
RB unit.
*2: When connecting the 2-wire type remote controller, Y3 is not used.
Outdoor unit or RB unit *1
Transmission
Transmission
Power supply
Breaker1 Breaker1 Breaker1
Breaker2 Breaker2 Breaker2
Power supply
Remote controller Remote controller
(Master) Remote controller
(Slave)
Outdoor air unit
Remote
control
*2 *2
*2
Indoor unit Indoor unit
(Crossover wiring of power supply)
Breaker2
Breaker1
Outdoor air unit
Power supply
Pull box
Pull box
Power supply
: Disconnect switch
Power supply Power supply
Indoor unit Indoor unit
Disconnect switch shall be installed between indoor unit and pull box.
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6.3. Unit wiring
Before attaching the cable to terminal block.
6.3.1. Power supply cable
Adjust the length of power supply cable to avoid excessive tension with referring figure
below.
Power supply cable
Earth (Ground)
cable
Conduit connector
2-3/8 in (60 mm)
2-3/4 in (70 mm)
A. For solid core wiring
(1) To connect the electrical terminal, follow the below diagram and connect after looping
it around the end of the cable.
(2) Use the specified cables, connect them securely, and fasten them so that there is no
stress placed on the terminals.
(3) Use an appropriate screwdriver to tighten the terminal screws. Do not use a
screwdriver that is too small, otherwise, the screw heads may be damaged and
prevent the screws from being properly tightened.
(4) Do not tighten the terminal screws too much, otherwise, the screws may break.
(5) See the table for the terminal screw tightening torques.
(6) Please do not fix 2 power supply cables with 1 screw.
Strip 1 in
(25 mm)
Screw with
special washer
Terminal block
Cable end (Loop)
Cable end (Loop)
Loop
Screw with
special washer
Cable
Cable
WARNING
When using solid core cables, do not use the ring terminal. If you use the solid core
cables with the ring terminal, the ring terminal’s pressure bonding may malfunction
and cause the cables to abnormally heat up.
B. For strand wiring
(1) Use ring terminals with insulating sleeves as shown in the figure below to connect to
the terminal block.
(2) Securely clamp the ring terminals to the cables using an appropriate tool so that the
cables do not come loose.
(3) Use the specified cables, connect them securely, and fasten them so that there is no
stress placed on the terminals.
(4) Use an appropriate screwdriver to tighten the terminal screws. Do not use a
screwdriver that is too small, otherwise, the screw heads may be damaged and
prevent the screws from being properly tightened.
(5) Do not tighten the terminal screws too much, otherwise, the screws may break.
(6) See the table for the terminal screw tightening torques.
(7) Please do not fix 2 power supply cables with 1 screw.
Strip 3/8 in
(10 mm) Ring terminal
Screw with
special washer
Ring terminal
Terminal block
Cable
Screw with
special washer
Sleeve
Ring terminal
Cable
WARNING
Use ring terminals and tighten the terminal screws to the specified torques, otherwise,
abnormal overheating may be occurred and possibly cause serious damage inside the
unit.
Tightening torque
M4 screw
(Power supply/L1, L2 (N), GND)
11 to 16 lbf·in
(1.2 to 1.8 N·m)
6.3.2. Transmission and Remote controller cable
1 in (25 mm)
1-3/8 in (35 mm)
Shielded cable (no film)
Transmission cable
Remote controller cable
1 in (25 mm)
1 in (25 mm)
For 3-wire type For 2-wire type
• When the 2 cables are attached.
Fig. B
GOOD PROHIBITED
Different diameter Connect to 1 side
WARNING
Tighten the terminal screws to the specified torques, otherwise, abnormal overheating
may be occurred and possibly cause serious damage inside the unit.
Tightening torque
M3 screw
(Transmission/X1, X2)
(Remote controller/Y1, Y2, Y3)
4.4 to 5.3 lbf·in
(0.5 to 0.6 N·m)
CAUTION
To peel the film from the lead cable, use a dedicated tool that will not damage the
conductor cable.
When installing a screw on the terminal block, do not cut the cable by overtightening
the screw. On the other hand, an undertightened screw can cause faulty contact, which
will lead to a communication failure.
6.4. Connection of wiring
(1) Remove the control box cover and install each connection cable.
Loosen the screws.
(4 screws)
Cover box
(2) After wiring is complete, clamp the remote controller cable, transmission cable and
power supply cable with cable tie.
CAUTION
When switching the DIP switch (SW1), be sure to turn off the power supply to the
indoor unit. Otherwise, the PC board of the indoor unit may be damaged.
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Conduit (L1,L2(N):
Power supply cable)
X1, X2:
Transmission cable
* When the cables for
external input and exter-
nal output will be used,
these cables must be
fixed together with the
remote controller cable
or the transmission cable
by a cable tie after these
have been connected.
Lock nut
*1: If you connect the remote controller cable to the terminal
Y3, 2-wire type remote controller does not work.
Y1, Y2, Y3: Remote
controller cable
Cable tie* (Medium)
(Accessories)
DIP switch
(SW1)
For 2-wire type For 3-wire type
Connect the remote
controller cable
Y1:Non-polar
Y2:Non-polar
Y3:Do not connect *1
Y1:Red
Y2:White
Y3:Black
Set the DIP switch
(SW1)
2WIRE
(Factory setting) 3WIRE
• Fill the cable holes with putty in order to prevent small animals from entering.
CAUTION
When installing a screw on the terminal block, do not cut the cable by overtightening
the screw. On the other hand, an undertightened screw can cause faulty contact,
which will lead to a communication failure.
(3) Attach the control box cover.
●Fix the conduit with the supporters as shown below.
Conduit (Power supply cable)
Supporter
Indoor unit
30 in
(756 mm)
or less
54 in
(1,361 mm)
or less
54 in
(1,361 mm)
or less
54 in
(1,361 mm)
or less
6.5. External input and external output (Optional parts)
CAUTION
Do not operate any switches other than prescribed, as it can cause the unit to operate
improperly or malfunction.
Use an insulated screwdriver to set the DIP switches.
Controller PCB
(CNA01)
(CNA02)
(CNA07)
(CNA04)
ON
SW1
SW2
SW3
SW4
DIP
switch
(SET 2)
OFF Dry contact terminal (Red)
Apply voltage terminal
(White)
Output terminal (CNB01)
(CNA03)
(CNA06)
(1) External input
• Indoor unit can be Operation/Stop, Emergency stop or Forced stop by using indoor unit
PCB CNA01 or CNA02.
• “Operation/Stop” mode, “Emergency stop” mode or “Forced stop” mode can be selected
with function setting of indoor unit.
• Indoor unit can be Forced thermostat off by using indoor unit PCB CNA03 or CNA04.
• Indoor unit can be External fan speed control by using indoor unit PCB CNA06 or
CNA07.
•
A twisted pair cable (22 AWG) should be used. Maximum length of cable is 492 ft (150 m).
• Use an external input and output cable with appropriate external dimension, depending
on the number of cables to be installed.
• The wire connection should be separate from the power cable line.
Input select
Use either one of these types of terminal according to the application. (Both types of
terminals cannot be used simultaneously.)
●Apply voltage terminal ([CNA01], [CNA03], [CNA06])
When a power supply must be provided at the input device you want to connect, use the
Apply voltage terminal ([CNA01], [CNA03], [CNA06]).
Input
device 1
Input
device 2
Input
device 3
Input
device 4
Load
resistance
Load
resistance
Load
resistance
Load
resistance
*1
DC power supply
12 to 24V
connected unit
*a
*a
*a
*a
P.C. B
CNA01
CNA03
CNA06
*b
*1 Make the power supply DC12 to 24V. Select a power supply capacity with an ample
surplus for the connected load.
Do not impress a voltage exceeding 24V across pins 1-2, and 1-3.
*a The allowable current is DC 5mA to 10mA. (Recommended: DC5mA)
Provide a load resistance such that the current becomes DC10mA or less.
Select very low current use contacts (usable at DC12V, DC1mA or less).
*b The polarity is [+] for pin 1 and [-] for pin 2 and 3. Connect correctly.
When connected to Apply voltage terminals of multiple indoor units with a connected unit,
be sure to make a branch outside the indoor unit using a pull box, etc. as shown on below
example.
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DC power supply
12 to 24V
connected unit
Load
resistance
P.C .B
P.C .B
CNA01
P.C .B
Input
device 1
Input
device 2
Indoor unit
Indoor unit
Indoor unit
Load
resistance
CNA01
CNA01
●Dry contact terminal ([CNA02], [CNA04], [CNA07])
When a power supply is unnecessary at the input device you want to connect, use the Dry
contact terminal ([CNA02], [CNA04], [CNA07]).
P.C .B
GND
Ch 1
Ch 3
Ch 4
*c
*c
*c
*c
*d
Ch 2
CNA02
CNA04
CNA07
connected unit
*c Select very low current use contacts (usable at DC12V, DC1mA or less).
*d The wiring is different from Apply voltage terminals. Be sufficiently careful when wiring.
When connected to Dry contact terminals of multiple indoor units with a connected unit,
insulate each indoor unit with relay, etc. as shown on below example.
Power supply for relay
Indoor unit Indoor unit Indoor unit
Input device 2
Input device 1
K1 - K6: Relay
(Device for DC Current)
P.C .B
K1
P.C .B
P.C .B
CNA02
K2
K3
K4
K5
K6
CNA02
CNA02
NOTE :
When connected to multiple indoor units directly, it will cause breakdown.
Operation behavior
●Input signal type
The input signal type can be selected.
It is switched by DIP switch on the indoor unit PCB. Pulse
The width of pulse
must be longer than
200msec.
Edge
DIP switch [Set 2 SW2] Input signal type
OFF (Factory setting) Edge
ON Pulse
●When function setting is “Operation/Stop” mode.
[In the case of “Edge” input]
Connector Input signal Command
Ch1 of CNA01 or CNA02 OFF →ON Operation
ON →OFF Stop
[In the case of “Pulse” input]
Connector Input signal Command
CNA01 or CNA02 Ch1 OFF →ON Operation
Ch2 OFF →ON Stop
* The last command has priority.
* The indoor units within the same remote controller group operates in the same mode.
●When function setting is “Emergency stop” mode.
[In the case of “Edge” input]
Connector Input signal Command
Ch1 of CNA01 or CNA02 OFF →ON Emergency stop
ON →OFF Normal
[In the case of “Pulse” input]
Connector Input signal Command
CNA01 or CNA02 Ch1 OFF →ON Emergency stop
Ch2 OFF →ON Normal
* All indoor units of same refrigerant system stops when Emergency stop operates.
●When function setting is “Forced stop” mode.
[In the case of “Edge” input]
Connector Input signal Command
Ch1 of CNA01 or CNA02 OFF →ON Forced stop
ON →OFF Normal
[In the case of “Pulse” input]
Connector Input signal Command
CNA01 or CNA02 Ch1 OFF →ON Forced stop
Ch2 OFF →ON Normal
* When the forced stop is triggered, indoor unit stops and Operation/Stop operation by a
remote controller is restricted.
* When forced stop function is used with forming a remote controller group, connect the
same equipment to each indoor unit within the group.
• Selection method of functions
“Operation/Stop” mode or “Emergency stop” mode, “Forced stop” mode can be selected
with function setting of indoor unit.
●Forced thermostat off function
[“Edge” input only]
Connector Input signal Command
Ch3 of CNA03 or CNA04 OFF →ON Thermostat off
ON →OFF Normal
●External fan speed control
• Switching to enable or disable
It is switched by DIP switch on the indoor unit PCB.
DIP switch [Set 2 SW4] Status
OFF (Factory setting) Disable
ON Enable
• Switching of fan speed
It is switched by DIP switch on the indoor unit PCB.
DIP switch [Set 4 SW1] Fan speed
OFF (Factory setting) Hi 1
ON Hi 2
[“Edge” input only]
Connector Input signal Fan speed
Ch4 of CNA06 or CNA07 OFF →ON Hi (Standard)
ON →OFF Hi 1* or Hi 2*
* Refer to the Design & Technical Manual for each fan speed.
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(2) External output
• A twisted pair cable (22AWG) should be used. Maximum length of cable is 82 ft (25 m).
• Use an external input and output cable with appropriate external dimension, depending
on the number of cables to be installed.
• Output voltage: Hi DC12V±2V, Lo 0V.
• Permissible current: 50mA
Output select
●When indicator etc. are connected directly
Operation
indicator
Error
indicator
Indoor unit Fan
status indicator
connected unit
P.C .B
CNB
01
●When connecting with unit equipped with a power supply
Heater
Humidifier
CNB
01
P.C .B
Connected
device 1
Connected
device 2
Connected
device 3
connected unit Relay (locally purchased)
Operation behavior
Connector Output voltage Status
CNB01
External output1
Pins 1-2
0V Stop
DC 12 V Operation
External output2
Pins 1-3
0V Normal
DC 12 V Error
External output3
Pins 1-4
0V Indoor unit fan stop
DC 12 V Indoor unit fan operation
External output4
Pins 1-5
0V Auxiliary heater OFF
DC 12 V Auxiliary heater ON
External output5
Pins 1-6
0V Humidifier OFF
DC 12 V Humidifier ON
* When connecting the auxiliary heater, “DIP switch SET2 SW3 (Fan delay setting)” must
be on.
(3) Connection methods
• Wire modification
Remove insulation from wire attached to wire kit connector.
Remove insulation from locally purchased cable. Use crimp type insulated butt connector
to join field cable and wire kit wire.
Connect the wire with connecting wire with solder.
IMPORTANT: Be sure to insulate the connection between the wires.
Option parts
External input/output wire
Solder and insulate the connected parts.
Locally purchased
• Connection terminals and wiring arrangement
In following figure, all the possible connectors are connected for description.
In actual installation, you cannot connect all the connectors at once.
Controller PCB
Cable tie
(accessories)
6.6. IR receiver unit (Optional parts)
• For the installation method, please refer to the INSTALLATION MANUAL of IR receiver
unit.
Connection methods
• Connection terminals
Controller PCB
IR receiver unit terminal (CN18)
• Wiring arrangement
Core
Controller PCB
IR receiver unit cable
(Optional parts)
Cable tie
(accessories)
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7. FIELD SETTING
There are 3 methods for address setting by FIELD SETTING as follows.
Set by either of the methods.
Each setting method is described (1) to (3) below.
(1)
IU AD, REF AD SW settings .............. This section (7.1. Setting the address)
(2) Remote controller settings............... Refer to the wired or wireless remote controller
manual for detailed setting information. (Set IU
AD, REF AD SW to 0)
(3) Automatic address settings ............. Refer to the outdoor unit manual for detailed
setting information. (Set IU AD, REF AD SW to 0)
CAUTION
Be sure to turn OFF the power before performing the field setting.
Do not operate any switches other than prescribed, as it can cause the unit to
operate improperly or malfunction.
Use an insulated screwdriver to set the DIP switches.
7.1. Setting the address
Manual address setting method
• If the receiver unit is attached, the indoor unit address and the refrigerant circuit
address can also be set up through the wireless remote controller.
Rotary switch
Example: “0”
Rotary switch
Example: “0”
Setting Setting
range Type of switch
Indoor unit address 0 to 63
Setting
example
2
IU AD × 10 IU AD × 1
Refrigerant circuit
address 0 to 99
Setting
example
63
REF AD × 10 REF AD × 1
(1) Indoor unit address
Rotary switch (IU AD × 1)...Factory setting “0”
Rotary switch (IU AD × 10)...Factory setting “0”
When connecting multiple indoor units to 1 refrigerant system, set the address at IU
AD SW as shown in the Table A.
(2) Refrigerant circuit address
Rotary switch (REF AD × 1)...Factory setting “0”
Rotary switch (REF AD × 10)...Factory setting “0”
In the case of multiple refrigerant systems, set REF AD SW as shown in the Table A
for each refrigerant system.
Set to the same refrigerant circuit address as the outdoor unit.
• If working in an environment where the wireless remote controller can be used, the
addresses can also be set using the remote controller.
• If setting the addresses using the wireless remote controller, set the indoor unit
address and refrigerant circuit address to “00”.
(For information on setting using the wireless remote controller.)
Table A
Address Rotary Address Rotary
Switch Setting Switch Setting
Refrigerant circuit REF AD SW Indoor unit IU AD SW
× 10 × 1 × 10 × 1
000000
101101
202202
303303
404404
505505
606606
707707
808808
909909
10 1 0 10 1 0
11 1 1 11 1 1
12 1 2 12 1 2
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
99 9 9 63 6 3
Do not set the indoor unit address (IU AD SW) at 64 to 99.
It may result in failure.
(3) Remote controller address
i) 3-wire type
Rotary switch (RC AD SW)...Factory setting “0”
When connecting multiple indoor units to 1 standard wired remote controller, set the
address at RC AD SW in sequence from 0.
Setting Setting range Type of switch
Remote controller
address 0 to 15 Setting
example
0
RC AD
RC AD SW
0
RC AD SW
1
RC AD SW
0
RC AD SW
1
GOOD PROHIBITED
Outdoor air
unit Outdoor air
unit Outdoor air unit Indoor unit
Outdoor air unit cannot form the same
remote controller group as the indoor
unit of other type.
RC AD SW 01234567
Address 01234567
RC AD SW 89ABCDEF
Address 8 9 10 11 12 13 14 15
ii) 2-wire type
Rotary switch (RC AD SW)...Factory setting “0”
Since the remote controller address settings are automatically configured, you do not
need to configure them.
If configuring manually, it is necessary to configure both the indoor unit and the remote
controller. For details, please refer to the remote controller manual.
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7.2. Fan delay setting
It is a function to delay the stop of cooling fan when the air conditioner is stopped.
When auxiliary heater is connected, turn “ON” this switch. When you connect auxiliary
heater, be careful enough.
DIP switch SET 2 SW3 Fan delay mode
OFF (Factory setting) Invalid
ON Valid
7.3. Function setting
• FUNCTION SETTING can be performed with the wired or wireless remote controller.
(The remote controller is optional equipment)
• Refer to the wired or wireless remote controller manual for detailed setting information.
• Refer to “7.1. Setting the address” for indoor unit address and refrigerant circuit address
settings.
• Turn the power of the indoor unit ON before starting the setting.
* Turning on the power to the indoor units initializes EEV, so make sure the piping air
tight test and vacuuming have been conducted before turning on the power.
* Also check again to make sure no wiring mistakes were made before turning on the
power.
Function details
Function Function
number Setting number Default Details
Filter
indicator
interval
11
00 Standard ○Adjust the filter cleaning interval
notification. If the notification is too
early, change to setting 01. If the
notification is too late, change to
setting 02.
01 Longer
02 Shorter
Filter
indicator
action
13
00 Enable
Enable or disable the filter indica-
tor. Setting 02 is for use with a
central remote controller.
01 Disable ○
02
Display only
on central
remote
controller
Static
pressure 26
05 SP mode 05
[AAUA48TLAV]
• Range of static pressure
SP mode 05 to 19
(0.20 to 0.74 in WG
(50 to 185 Pa))
• Normal static pressure
0.74 in WG (185 Pa) Pa
[AAUA72TLAV]
• Range of static pressure
SP mode 05 to 20
(0.20 to 0.80 in WG
(50 to 200 Pa))
• Normal static pressure
0.80 in WG (200 Pa) Pa
06 SP mode 06
07 SP mode 07
08 SP mode 08
09 SP mode 09
10 SP mode 10
11 SP mode 11
12 SP mode 12
13 SP mode 13
14 SP mode 14
15 SP mode 15
16 SP mode 16
17 SP mode 17
18 SP mode 18
19 SP mode 19
20 SP mode 20
21 SP mode 21
22 SP mode 22
31 Normal SP ○
Auto
restart 40 00 Enable Enable or disable automatic sys-
tem restart after a power outage.
01 Disable ○
Cool Air
Preven-
tion
43
00 Super low Restrain the cold airflow with mak-
ing the airflow lower when starting
heating operation. To correspond
to the ventilation, set to 01.
01
Follow the
setting on
the remote
controller
○
Function Function
number Setting number Default Details
External
control 46
00 Start/Stop ○Allow an external controller to start
or stop the system, or to perform
an emergency stop.
*If an emergency stop is
performed from an external
controller, all refrigerant systems
will be disabled.
*If forced stop is set, indoor unit
stops by the input to the external
input terminals, and Start/Stop by
a remote controller is restricted.
01 Emergency
stop
02 Forced stop
Error
report
target
47
00 All ○Change the target for reporting er-
rors. Errors can either be reported
in all locations, or only on the
central remote controller.
01
Display only
on central
remote
controller
(Forbidden) 60 00 ○
(Forbidden) 61 00 ○
(Forbidden) 62 00 ○
Hu-
midifer
control
63
00 mode 00 ○Select control conditions of exter-
nal output.
“Mode 00” is output when heating
thermostat is ON, “Mode 01” is
output in heating operation, “Mode
02” is output in heating operation
and in fan operation.
01 mode 01
02 mode 02
Thresh-
old tem-
perature
setting
for cool/
heat
switch
over
65
00 Mode 0
±10 °F (±5 °C)
○
Threshold temperature setting for
cool/heat mode under auto opera-
tion: Set temperature ±4 °F (±2 °C
to ±14 °F (±7 °C)
*Cool/heat mode tends to be
switched as the threshold tem-
perature range gets smaller, and
cool/heat mode becomes difficult
to be switched as the threshold
temperature range gets larger.
Set the proper value according to
use conditions.
01 Mode 1
±4 °F (±2 °C)
02 Mode 2
±6 °F (±3 °C)
03 Mode 3
±8 °F (±4 °C)
04 Mode 4
±10 °F (±5 °C)
05 Mode 5
±12 °F (±6 °C)
06 Mode 6
±14 °F (±7 °C)
8. TEST RUN
8.1. Test run using Outdoor unit (PCB)
• Refer to the Installation Manual for the outdoor unit if the PCB for the outdoor unit is to
be used for the test run.
8.2. Test run using remote controller
• Refer to the Installation Manual for the remote controller to perform the test run using
the remote controller.
• When the air conditioner is being test run, the OPERATION and TIMER indicator lamps
flash slowly at the same time.
For details, please refer to the Manual of “IR Receiver Unit” or “Wired Remote Controller”.
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9. CHECK LIST
Pay special attention to the check items below when installing the indoor unit(s). After
installation is complete, be sure to check the following check items again.
Check items If not performed correctly Check
box
Has the indoor unit been installed cor-
rectly? Vibration, noise, indoor unit may drop
Has there been a check for gas leaks
(refrigerant pipes)? No cooling, No heating
Has heat insulation work been com-
pleted? Water leakage
Does water drain easily from the
indoor units? Water leakage
Is the voltage of the power source the
same as that indicated on the label on
the indoor unit?
No operation, heat or burn damage
Are the wires and pipes all connected
completely? No operation, heat or burn damage
Is the indoor unit earthed (grounded)? Short circuit
Is the connection cable the specified
thickness? No operation, heat or burn damage
Are the inlets and outlets free of any
obstacles? No cooling, No heating
Does start and stop air conditioner
operation by remote controller or
external device?
No operation
After installation is completed, has the
proper operation and handling been
explained to the user?
10. INDICATOR LAMP STATUS
Power indicator lamp (Green) Status contents
(Lit) Lit when the power is turned on.
(Flashing) There is a fault with the communication
board or the main board.
: 0.1s ON / 0.1s OFF
Controller PCB
Power indicator
lamp (green)
11. ERROR CODES
If you use a wired type remote controller, error codes will appear on the remote controller
display. If you use a wireless remote controller, the lamp on the photodetector unit will
output error codes by way of blinking patterns. See the lamp blinking patterns and error
codes in the table below.
Error indications Wired Remote
Controller
Error code
Error contents
OPERATION
lamp (green)
TIMER lamp
(orange)
FILTER lamp
(red)
(1) (2) Remote controller
communication error
(1) (4) Network communication
error
(1) (6) Peripheral unit
communication error
(2) (6) Indoor unit address
setting error
(2) (9)
Connection unit number
error in wired remote
controller system
(3) (1) Indoor unit power supply
abnormal
Error indications Wired Remote
Controller
Error code
Error contents
OPERATION
lamp (green)
TIMER lamp
(orange)
FILTER lamp
(red)
(3) (2) Indoor unit main PCB
error
(3) (9) Indoor unit power supply
circuit error
(3) (10)
Indoor unit
communication circuit
(wired remote controller)
error
(4) (2) Indoor unit heat ex.
temp. thermistor error
(4) (10) Indoor unit air temp.
thermistor error
(5) (1) Indoor unit fan motor1
error
(5) (2) Indoor unit coil
(expansion valve) error
(5) (3) Indoor unit water drain
abnormal
(5) (9) Indoor unit fan motor 2
error
(9) (15) Outdoor unit
miscellaneous error
(13) (1) RB unit error
Display mode : 0.5s ON / 0.5s OFF
: 0.1s ON / 0.1s OFF
( ) : Number of flashing
Wired Remote Controller Display
Error code
Error icon
Touch the [Status]. Touch the [Error Information].
For more information, refer to the installation manual of the remote controller.
2-digit numbers are corresponding to
the error code in the preceding table.
Touch the [Next Page] (or [previous page])
to switch to other indoor unit information.
UTY-RNKU (3-wire type)
UTY-RNRU (2-wire type)
For details on marking the ERROR CODES, please refer to the Manual of “IR Receiver
Unit” or “Wired Remote Controller”.
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