Nordic VRF SYSTEM User manual

PART NO. 9371022208-02
English
INSTALLATION MANUAL
VRF SYSTEM
INDOOR UNIT
Cassette Type
For authorized service personnel only.
Contents
1. SAFETY PRECAUTIONS ............................................. 2
2. ABOUT THE UNIT
2.1. Precautions for using the R410A refrigerant .......... 2
2.2. Special tool for R410A............................................ 2
2.3. Accessories............................................................ 2
2.4. Optional parts......................................................... 3
3. INSTALLATION WORK
3.1. Selecting an installation location............................ 3
3.2. Installation dimensions........................................... 4
3.3. Installing the unit .................................................... 5
4. PIPE INSTALLATION
4.1. Selecting the pipe material..................................... 7
4.2. Pipe requirement.................................................... 7
4.3. Flare connection (pipe connection)........................ 7
4.4. Installing heat insulation......................................... 8
5. INSTALLING DRAIN PIPES.......................................... 9
6. ELECTRICAL WIRING
6.1. Electrical requirement .......................................... 11
6.2. Wiring method...................................................... 11
6.3. Unit wiring ............................................................ 11
6.4. Connection of wiring............................................. 13
6.5. External input and external output
(Optional parts).................................................. 14
7. FIELD SETTING
7.1. Setting the address .............................................. 16
7.2. Custom code setting ............................................ 17
7.3. Function setting.................................................... 18
8. DECORATION PANEL INSTALLATION...................... 19
9. TEST OPERATION
9.1. Test operation using PCB (Outdoor unit) ............. 19
9.2. Test operation using Remote Controller............... 19
10. CHECK LIST ............................................................... 19
11. ERROR CODES ......................................................... 20
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1. SAFETY PRECAUTIONS
• 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!
This mark indicates procedures which, if
improperly performed, might lead to the
death or serious injury of the user.
• Request your dealer or a professional installer to install the
unit in accordance with this Manual.
An improperly installed unit can cause serious accidents
such as water leakage, electric shock, or fire.
If the 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 work must be performed in accordance with
national wiring standards 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.
CAUTION!
This mark indicates procedures which, if
improperly performed, might possibly result
in personal harm to the user, or damage to
property.
2. ABOUT THE UNIT
2.1. Precautions for using the 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 leakage, make sure that it does not
exceed the concentration limit.
If a refrigerant leakage 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 leakage 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 the R410A refrigerant, use
dedicated tools and piping materials that have been
manufactured specifically for R410A use.
Because the pressure of the 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 Contents of change
Gauge manifold
Pressure is huge and cannot be
measured with a conventional 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 –0.1 to 5.3 MPa and a low
pressure display range –0.1 to 3.8 MPa.
Charging hose
To increase pressure resistance, the
hose material and base size were
changed.
Vacuum pump
A conventional 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 –100.7
kPa (5 Torr, –755 mmHg).
Gas leakage
detector
Special gas leakage detector for HFC
refrigerant R410A.
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 to fall, 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.
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Name and Shape Q’ty Application
Operation Manual
1
Installation Manual
1
(This book)
Cable tie (Large)
4
For fixing the connection
pipe (Large and Small)
Cable tie (Medium)
3
For transmission and
remote controller cable
binding.
Coupler heat
insulation
(Small) 1
For indoor side pipe joint
(Small)
Coupler heat
insulation
(Large) 1
For indoor side pipe joint
(Large)
Template
(Carton top)
1
For installing indoor unit.
Washer
8
For installing indoor unit.
Insulation
1
For installing drain pipe
Drain Hose Assy
1
For installing drain pipe
VP25 (O.D.32, I.D.25)
Hose Band Assy
1
For installing drain hose
Drain Pipe
Insulation
1
For installing drain pipe
2.4. Optional parts
The following options are available.
• External output wire (P/N 9379529006)
• External input (voltage) wire (P/N 9368779016)
• External input (no voltage) wire (P/N 9368779009)
3. INSTALLATION WORK
Especially, the installation place is very important for the split
type air conditioner because it is very difficult to move from
place to place after the first installation.
3.1. Selecting an installation location
WARNING
• Select installation locations that can properly support the
weight of the indoor. Install the units securely so that they do
not topple or fall.
CAUTION
• Do not install the unit in the following areas:
• Area with high salt content, such as at the seaside.
It will deteriorate metal parts, causing the parts to fall 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 fall 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, outdoor unit, power supply cable,
transmission cable, and remote controller cable at least 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 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.
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• Decide the mounting position with the customer as
follows:
(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) A place from where the air can be distributed evenly
throughout the room by the unit.
(5) Install the unit where connection to the outdoor unit is easy.
(6) Install the unit where the connection pipe can be easily
installed.
(7) Install the unit where the drain pipe can be easily installed.
(8) Install the unit where noise and vibrations are not amplified.
(9) Take servicing, etc., into consideration and leave the spaces.
Also install the unit where the filter can be removed.
3.2. Installation dimensions
• The ceiling rear height as shown in the figure.
Strong and durable ceiling
3,000 mm or more
H
1,800 mm or more
256 mm or more (AUXD18,24)
298 mm or more (AUXA30,36,45,54)
Obstruction
1,000 mm or more
Floor
1,500 mm
or more
H (The maximum height from floor to ceiling)(mm)
Model
name
AUXD18 AUXD24 AUXA30 AUXA36 AUXA45 AUXA54
Standard
mode
3,000 3,000 3,200 3,200 3,200 3,200
High
Ceiling
mode
3,500 3,500 3,600 4,200 4,200 4,200
• Discharge Direction Setting
• The discharge direction can be selected as shown below.
4 DIRECTION
3 DIRECTION
100 mm
or more
* Select the most appropriate airflow direction from 3 or
4 directions according to the shape of the room and the
installation position.
* When changing the number of outlets, we recommend using
the optional AIR OUTLET SHUTTER PLATE KIT to close the
outlet.
* For the specific closing pattern, please refer to the attached
AIR OUTLET SHUTTER PLATE KIT’S MANUAL. (Do so
before installing the decorative panel as it will be installed on
the body.)
* Be sure to make the function settings with the remote
controller according to the number of airflow outlets and the
installed ceiling height.
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3.3. Installing the unit
WARNING
• Install the air conditioner in a location which can withstand a
load do 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.
3.3.1. Position the ceiling hole and hanging bolts
(1) Positions of the ceiling opening, hanging bolt pitch, piping
and ducts. (unit: mm)
•
Ceiling opening and hanging bolt pitch.
950 mm (Panel frame)
860 - 910 mm (Ceiling opening)
840 mm (Body frame)
795 mm (Hanging bolt pitch)
20 - 45 mm20 - 45 mm
20 - 45 mm20 - 45 mm
130 mm
130 mm
80 mm
699 mm (Hanging bolt pitch)
950 mm (Panel frame)
860 - 910 mm (Ceiling opening)
840 mm (Body frame)
200 mm 130 mm
50 mm
50 - 100 mm
10 mm 40 mm
140 - 145 mm
B
A
Model A B
18/24L 246 256
30/36/45/54L 288 298
• Refrigerant piping and drain piping positions.
10 mm
80 mm
Gas pipe
Liquid pipe
Drain pipe
(Connect the attached
drain hose)
358 mm 278 mm
60 mm
200 mm
140 mm 180 mm
• Distribution ducts and fresh air inlet positions.
Distribution duct connecting port
Drain pipe
Distribution duct connecting port
Fresh air inlet position
Distribution duct connecting port
Refrigerant pipe
Distribution duct connecting port
100mm
10 x Ø 2.5 hole
100mm
83mm
352mm
83mm
Cut out
90mm
185mm
Detailed diagram of distribution duct connecting port (4 sides)
250mm
4 x Ø 2.5 hole
Fresh air inlet position
Burling hole pitch Ø 70mm
Cut out
Ø 88mm
185mm
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Note:
Conduct proper insulation when connecting the distribution
ducts and fresh air inlet.
Insulation
Fresh air inlet position
* When sucking in the fresh air, please detach the insulation
affixed to the drain pan.
(2) Setting the positions of hanging bolt and ceiling opening.
• Use an installation template (packaging top surface) to set
the positions of the hanging bolt and ceiling opening and drill
holes.
(3) Hanging structure.
• Select a strong structure for the hanging location.
• If necessary, reinforce the hanging bolt with quakeproof
columnar support material to prevent shaking.
• Use hanging bolts of M8-M10.
3.3.2. Hanging preparations
• Firmly fasten the hanging bolts as shown in the figure or by
another method.
• Install the hanging bolts at a place where they would be
capable of holding a weight of at least 490 N per bolt.
Hole-in anchor
Hole-in plug Concrete Insert
Hanging bolt M10
3.3.3. Body installation
(1) Install the attached washer and nut (prepared on site) onto
the hanging bolt.
(2) Hook the body onto the hanging bolt.
(3) Adjust the dimensions of the ceiling surface from the body.
After installing the decorative panel, you can make fine
adjustment of the height of the body. For details, refer to the
installation manual of the decorative panel.
WARNING
• Perform final tightening by tightening the double nut firmly.
• Be sure to install the body horizontally and adjust the height
below the body and the ceiling surface properly.
Hanging bolt
Nut A
Washer
Washer
Nut B (Double Nut)
30 or more
10~15
After installing the body,
tighten the nuts.
3.3.4. Leveling
• Using a level, or vinyl hose filled with water, fine adjust so
that the body is level.
• Inclined installation so as the drain pipe side is higher may
cause a malfunction of the float switch, and may cause
water leakage.
Vinyl hoses
Drain pipe
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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.
4.1. Selecting the pipe material
CAUTION
• Do not use existing pipes.
• 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
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 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 [mm (in.)] Thickness [mm]
6.35 (1/4) 0.80
9.52 (3/8) 0.80
12.70 (1/2) 0.80
15.88 (5/8) 1.00
19.05 (3/4) 1.20
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 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 70-80 %, use heat insulation that is 15 mm
or thicker and if the expected humidity exceeds 80 %, use
heat insulation that is 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
20 °C).
4.3. Flare connection (pipe connection)
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 pipe cutter and 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 outdoor units respectively) onto the pipe
and perform the flare processing with a flare tool. Use the
special R410A flare tool, or the conventional 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.
B
A
L
Check if [L] is flared uniformly
and is not cracked or scratched.
Pipe
Die
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Pipe outside
diameter
[mm (in.)]
Dimension A [mm] Dimension B-0
0.4
[mm]
Flare tool for R410A,
clutch type
6.35 (1/4)
0 to 0.5
9.1
9.52 (3/8) 13.2
12.70 (1/2) 16.6
15.88 (5/8) 19.7
19.05 (3/4) 24.0
When using conventional flare tools to flare R410A pipes,
the dimension A should be approximately 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 dimension A.
Width across
flats
Pipe outside
diameter [mm (in.)]
Width across flats
of Flare nut [mm]
6.35 (1/4) 17
9.52 (3/8) 22
12.70 (1/2) 26
15.88 (5/8) 29
19.05 (3/4) 36
4.3.2. Bending pipes
• If pipes are shaped by hand, 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
and the outdoor 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 connecting 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) Center the pipe against the port on the indoor unit, and then
turn the flare nut by hand.

Connection pipe
(Liquid)
Connection pipe(Gas)
(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. 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.
Connection pipe
Torque wrench
Indoor unit pipe
(Body side)
Flare nut
Holding wrench
Tighten with 2 wrenches.
Flare nut [mm (in.)] Tightening torque [N·m (kgf·cm)]
6.35 (1/4) dia. 16 to 18 (160 to 180)
9.52 (3/8) dia. 32 to 42 (320 to 420)
12.70 (1/2) dia. 49 to 61 (490 to 610)
15.88 (5/8) dia. 63 to 75 (630 to 750)
19.05 (3/4) dia. 90 to 110 (900 to 1,100)
4.4. Installing heat insulation
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.
After checking for gas leaks, insulate by wrapping insulation
around the 2 parts (gas and liquid) of the indoor unit coupling,
using the Coupler heat insulation.
After installing the Coupler heat insulation, wrap both ends with
vinyl tape so that there is no gap.
Make sure that the cable ties overlap the heat insulation pipe.
Cable tie (Large)
(Accessories)
Body
Be sure to overlap the insulation
Coupler
heat
insulation
Coupler heat
insulation
No gap
CAUTION
• Must fit tightly against body without any gap.
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5. INSTALLING DRAIN PIPES
• Install the drain pipe with downward gradient (1/100 to 1/50)
and so there are no rises or traps in the pipe. Unsmooth
draining caused by accumulated water flow in the pipe may
cause clogged drain.
• Use general hard polyvinyl chloride pipe (VP25) [outside
diameter 32 mm].
• When the pipe is long, install supporters.
• Do not perform air bleeding. Drainage may be blown out.
• Always heat insulate the indoor side of the drain pipe.
• If it is impossible to have sufficient gradient of pipe, perform
drain lift-up.
Pipe size
Drain pipe VP25 (O.D. 32 mm)
Hanging fittings 1.5 to 2 m
VP25 (O.D. 32 mm)
Downward gradient 1/100 to 1/50
Rise
PROHIBITED:
Trap Air bleeding
When lifting up drain:
• Height of inclined pipe should be less than 850 mm from the
ceiling. A rise dimension over this range will cause leakage.
• Lift up the pipe vertically at the position of 300 mm or less from
the unit.
300 mm or less
VP25 (O.D. 32 mm)
local arrangement
850 mm or less
Horizontal or
upward gradient
Downward gradient
1/100 to 1/50
VP30 (O.D. 38 mm) or more
Downward gradient 1/100 to 1/50
850 mm or less
WARNING
• Do not insert the drain piping into the sewer where sulfurous
gas occurs. (Heat exchange erosion may occur)
• Insulate the parts properly so that water will not drip from the
connection parts.
• Check for proper drainage after the construction by using the
visible portion of transparent drain port and the drain piping
final outlet on the body.
CAUTION
• Do not apply adhesive agent on the drain port of the body.
(Use the attached drain hose and connect the drain piping)
Working procedure
(1) Install the attached drain hose to the 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
VP25) which is prepared on site or elbow socket.
(Apply color adhesive agent evenly until the gauge line and
seal)
(3) Check the drainage. (See separate diagram)
(4) Install the heat insulation.
(5) Use the attached heat insulation to insulate the drain port
and band parts of the body.
Install the knob
faces upward
(Accessories)
Attached drain hose
heat insulation
(Accessories)
Locally
arranged
vinyl pipe
Attached
drain hose
(Accessories)
Attached
hose band
Attached heat
insulation
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(a)Top view (b)Side view
(c)Top view
(d)Hose opening view
20 mm
5 - 10 mm
Applying area
of adhesive
VP25
Gauge line 4 mm or less
Make sure there are no gaps
Wind the attached heat insulation
around the hose band
Make sure the
alignment is on top
35 mm
Hose Band
Note: Check for drainage
Pour about 1 liter of water from the position shown in the
diagram or from the airflow outlet to the dew tray. Check for any
abnormalities such as strange noises and whether the drain
pump functions normally.
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 indoor unit and outdoor unit.
• 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.
• 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.
• 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.
• 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 block numbers and connection cable
colors with those of the outdoor 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
leakage may occur.)
• Install a ground leakage breaker. In addition, install the
ground leakage breaker so that the entire AC main power
supply is cut off at the same time. Otherwise, electric shock
or fire could result.
• Always connect the ground cable.
Improper 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 cord is damaged, it must be replaced by the
manufacturer, its service agent or similarly qualified persons
in order to avoid a hazard.
CAUTION
• Ground the unit.
Do not connect the ground cable to a gas pipe, water pipe,
lightning rod, or a telephone ground cable.
Improper 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 control cable together. Separate these cable
by 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 a ground for the indoor and outdoor units and
peripheral devices.
• Cut power (breaker) off.
• Touch metal part of the indoor and outdoor units for more
than 10 seconds to discharge static electricity charged in
the body.
•
Do not touch terminals of parts and patterns implemented on PCB.
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6.1. Electrical requirement
Voltage rating 230 V
Operating range 198 to 264 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.
• 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.
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 MFA
AUXA30LALH 0.51 A
20 A
AUXA36LALH 0.64 A
AUXA45LALH 0.83 A
AUXA54LALH 0.94 A
AUXD18LALH 0.32 A
AUXD24LALH 0.38 A
MCA: Minimum Circuit Ampacity
MFA: Maximum Fuse Ampacity
When the power crossover wiring is done, make it so that the
total of the MCA of the connected indoor units does not exceed
the 15 A.
If the capacity of connected indoor units exceeds the upper limit,
either add breakers or use a breaker with a greater capacity.
B. Earth leakage breaker requirements
Breaker capacity The number of connectable indoor
units
30 mA, 0.1 sec or less 12 or less*
100 mA, 0.1 sec or less 13 to 40
200 mA, 0.1 sec or less 41 to 48
*:
If the total number of units connected to the breaker exceeds
12, either add a 30mA breaker, or use breakers with a greater
capacity.
Recommended
cable size
(mm
2
)
Cable type Remark
Power supply
cable 2.5
Type245
IEC57 or
equivalent
1ø 50 Hz
198–264 V
2 Cable + ground
Transmission
cable 0.33
LONWORKS
compatible
cable
22 AWG LEVEL
4 (NEMA)
non-polar 2 core,
twisted pair solid
core diameter
0.65 mm
Remote
controller
cable
0.33 Sheathed PVC
cable*
Polar 3 core
Twisted pair
*: Use shielded cable in accordance with local rules for
remote controller cables.
6.2. Wiring method
(EXAMPLE)
POWER SUPPLY
OUTDOOR UNIT
TRANSMISSION
TRANSMISSION TRANSMISSION
POWER SUPPLY
POWER SUPPLY
POWER SUPPLY
POWER SUPPLY POWER SUPPLY
REMOTE
CONTROLLER
(MASTER)
REMOTE
CONTROLLER
(SLAVE)
REMOTE
CONTROLLER
REMOTE CONTROL
INDOOR UNIT INDOOR UNIT INDOOR UNIT
BREAKER
BREAKER
POWER SUPPLY REMOTE CONTROL POWER SUPPLY REMOTE CONTROL
BREAKER BREAKER
TRANSMISSION
[Crossover wiring of power supply]
Indoor unit Indoor unit Indoor unit
Power supply Power supply Power supply
Pull box
Pull box
Breaker
Power supply
6.3. Unit wiring
• Before attaching the cable to terminal block.
6.3.1. Power supply cable
20 mm
30 mm
Power supply cable
Earth cable
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.
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(6) Please do not fix 2 power supply cables with 1 screw.
Strip 25 mm
Loop
Screw with
special washer
Screw with
special washer
Cable end
(Loop)
Cable end
(Loop)
Cable
Cable
Terminal block
Do not apply branch wiring. It may result electric shock or fire.
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 10 mm
Sleeve
Screw with
special washer
Screw with
special washer
Ring terminal
Cable
Cable
Terminal block
Ring terminal
Ring
terminal
WARNING
• Use ring terminals and tighten the terminal screws to the
specified torques, otherwise, abnormal overheating may be
produced and possibly cause heavy damage inside the unit.
Tightening torque
M4 screw
(Power supply / L, N, GND)
1.2 to 1.8 N·m
(12 to 18 kgf·cm)
6.3.2. Transmission and Remote controller cable
30 mm
40 mm
Transmission cable
Shielded
cable (no film)
30 mm
Remote controller cable
• Connect remote controller and transmission cables as
shown in Fig. C.
Fig. C
OK NO GOOD NO GOOD
Different
diameter
Connect to
1 side
WARNING
• Tighten the terminal screws to the specified torques,
otherwise, abnormal overheating may be produced and
possibly cause heavy damage inside the unit.
Tightening torque
M3 screw
(Transmission / X1, X2)
(Remote controller / Y1, Y2, Y3)
0.5 to 0.6 N·m
(5 to 6 kgf·cm)
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.
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6.4. Connection of wiring
(1) Remove the control box cover and install each connection cable.
Please firmly tighten Connection cable and Remote controller cable with the attached cable tie.
2Control box cover 1Wiring cover
Power terminal board
ÚRemote controller connecting port
ÚCure the wiring connecting port and
remote controller connecting port with
paste or heat insulation so that insects
or dust will not enter the unit
Wiring connecting port
Connection cable clamp
Transmission cable and Remote
controller terminal board
X1, X2:
Transmission cable
Cable tie (Medium)
(Accessories)
Remote controller cable
Y1: Red
Y2: White
Y3: Black
L, N: Power supply cable
Cable clamp
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(2) Please fix the Connection cable with cable Clamp. And then
install the Wire Cover with screws.
Bind securely
Detail (c)
(c)
(3) Install control box cover.
CAUTION
• Do not bundle the remote controller cable, or wire the remote
controller cable in parallel, with the indoor unit connection
wire (to the outdoor unit) and the power supply cable. It may
cause erroneous operation.
1
6.5. External input and external output
(Optional parts)
Controller PCB
Input No Voltage terminal (CN17)
Input Voltage terminal (CN6)
Output terminal (CN16)
(1) External input terminals
• Indoor unit can be Start/Stop or Emergency stop, Forced stop
by using indoor unit PCB CN6 or CN17.
Wiring methods and specifications
• A twisted pair cable (22AWG) should be used. Maximum length
of cable is 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 selection
Use either one of these types of terminal according to the
application. (Both types of terminals cannot be used simultaneously.)
• Voltage terminal ([CN6])
When a power supply must be provided at the input device you
want to connect, use the voltage terminal ([CN6]).
1
2
3
+
+
-
-
-
Input device 1Input device 2
Load
resistance
Load
resistance
*1
DC power supply
12 - 24V
connected unit
*a
*a
P. C. B
CN6
*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 DC5~10mA. (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 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.
DC power
supply 12-24V
connected unit
Load
resistance
P. C. B
P. C. B
CN6
CN6
CN6
P. C. B
Input device 1
Input device 2
Indoor unitIndoor unitIndoor unit
Load
resistance
• No voltage terminal ([CN17])
When a power supply is unnecessary at the input device you
want to connect, use the no voltage terminal ([CN17]).
1
2
3
P. C. B
GND
Ch 1
*c *c
*d
Ch 2
CN17
connected unit
*c Select very low current use contacts (usable at DC12V,
DC1mA or less).
*d The wiring is different from voltage terminals. Be sufficiently
careful when wiring.
When connected to no voltage terminals of multiple indoor units
with a connected unit, insulate each indoor unit with relay, etc. as
shown on below example.
When connected to multiple indoor units directly, it will cause
breakdown.
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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
CN17
CN17
CN17
K2
K3
K4
K5
K6
Operation behavior
• Input signal type
The input signal type can be selected.
It is switched by Dip-sw on the indoor
unit PCB.
Dip-sw [Set 2-2] Input signal type
OFF Edge
ON Pulse
• When function setting is “Start/Stop” mode.
[In the case of “Edge” input]
Connector Input signal Command
Ch1 of
CN6 or CN17
OFF →ON Operation
ON →OFF Stop
[In the case of “Pulse” input]
Connector Input signal Command
CN6 or CN17
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
CN6 or CN17
OFF →ON Emergency stop
ON →OFF Normal
[In the case of “Pulse” input]
Connector Input signal Command
CN6 or CN17 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
CN6 or CN17
OFF →ON Forced stop
ON →OFF Normal
[In the case of “Pulse” input]
Connector Input signal Command
CN6 or CN17 Ch1 OFF →ON Forced stop
Ch2 OFF →ON Normal
* When the forced stop is triggered, indoor unit stops and Start/
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
“Start/Stop” mode or “Emergency stop” mode, “Forced stop”
mode can be selected with function setting of indoor unit.
(2) External output terminals
• When picking up output signals for operating status, abnormal
conditions or indoor unit status.
Wiring methods and specifications
• A twisted pair cable (22AWG) should be used. Maximum length
of cable is 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.
1
2
3
4
P. C. B
CN16
*4
+
+
-
-
-
-
DC power supply
12 - 24V *2
Connected load
*3
connected unit
Connected load
*3
Connected load
*3
*2 Provide a DC12 to 24V power supply. Select a power supply
capacity with an ample surplus for the connected load.
*3 The allowable current is 30mA or less. Provide a load
resistance such that the current becomes 30mA or less.
*4 Polarity is [+] for pin 1 and [-] for pins 2-4. Connect correctly.
Do not impress a voltage exceeding 24V across pins 1-2, 1-3,
and 1-4.
Operation behavior
Connector Output voltage Status
CN16
External
output1
Pins 1-2
0V Stop
DC 12-24 V *2 Operation
External
output2
Pins 1-3
0V Normal
DC 12-24 V *2 Error
External
output3
Pins 1-4
0V Indoor unit fan stop
DC 12-24 V *2 Indoor unit fan
operation
Pulse
The width of pulse
must be longer
than 200msec.
Edge
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(3) Connection methods
• Wire modification
Use a tool to cut off the terminal on the end of the wire, and
then remove the insulation from the cut end of the 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
Insulated connection
Field supply
Controller PCB
Input No Voltage terminal (CN17)
Input Voltage terminal (CN6)
Output terminal (CN16)
hook
Transmission cable
Cable tie (Field supply) :
Bind to the transmission cable
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.
7.1. Setting the address
CAUTION
• Use an insulated screwdriver to set the dip switches.
• Remove the cover referring to the below Fig. A. Fix the cover
after addressing setting.
Fig. A
Screw
Cover
Rotary switch
Example: “0”
Rotary switch
Example: “0”
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Setting Setting
range Type of switch
Indoor unit
address 0–63
Setting
example
2
IU AD × 10 IU AD × 1
Refrigerant
circuit
address
0–99
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 (IU AD × 1)...Factory setting “0”
Rotary switch (IU 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
Switch Setting
Address Rotary
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 failure.
(3) Remote controller address
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
0–15
Setting
example
0
RC AD
Example If 4 indoor units are connected.
RC AD SW
0
RC AD SW
1
RC AD SW
2
RC AD SW
3
Indoor unit
Remote
controller
Indoor unit Indoor unit Indoor unit
RC AD SW
01234567
Address 01234567
RC AD SW
89ABCDEF
Address 8 9 10 11 12 13 14 15
7.2. Custom code setting
Selecting the custom code prevents the indoor unit mix-up.
(Up to 4 codes can be set.)
Perform the setting for both the indoor unit and the remote
controller.
A B C D
A B C D
Indoor
unit
Remote
controller
Confusion
Code change
• Custom code setting for indoor unit
Set the DIP SW SET 3 SW1, SW2, referring to the Table B.
SW
1
SW
2
SW
3
SW
4
Dip switch
“SET 3”
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Table B
Custom code
A (Factory setting) B C D
DIP SW
SET 3 SW1 OFF ON OFF ON
DIP SW
SET 3 SW2 OFF OFF ON ON
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 de-
tailed setting information. (Set IU AD, REF AD SW to 0)
• 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 indoor units initializes EEV, so make
sure the piping air tight test and vacuuming have been con-
ducted 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 Default ○Adjust the filter cleaning
interval notification. If the noti-
fication 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
indicator. Setting 02 is for use
with a central remote control-
ler.
01 Disable
02
Display only
on central
remote con-
troller
Ceiling
airflow 20
00 Default ○Regulate the airflow ac-
cording to the needs of the
installation location. When
set to 01, the air flow will be
stronger.
01 High
Ceiling
Vertical
airflow
direction
23
00 Default ○Adjust the vertical airflow
direction. All airflow direction
louvers are adjusted together.
(Cassette type only)
01 Raise
Cool air
tem-
perature
trigger
30
00 Default ○Adjust the cool air trigger
temperature. To lower the
trigger temperature, use set-
ting 01. To raise the trigger
temperature, use setting 02.
01 Adjust (1)
02 Adjust (2)
Hot air
tem-
perature
trigger
31
00 Default ○
Adjust the hot air trigger
temperature. To lower the trigger
temperature by 6 degrees C, use
setting 01. To lower the trigger
temperature by 4 degrees C, use
setting 02. To raise the trigger
temperature, use setting 03.
01 Adjust (1)
02 Adjust (2)
03 Adjust (3)
Auto
restart 40
00 Enable
Enable or disable automatic
system restart after a power
outage.
01 Disable ○
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 report-
ing
errors. Errors can either be
reported in all locations, or
only on the wired remote.
01
Display only on
central remote
controller
7.3.1. Button name and function
MANUAL AUTO
button
OPERATION indicator
lamp (Green)
FILTER indicator
lamp (Red)
TIMER indicator
lamp (Orange)
(Optional)
7.3.2. Checking the function settings
• Press and hold the “MANUAL AUTO” button on the indoor unit
for 3 seconds to check the function settings. It is necessary
to disconnect the power in order to return to normal operation
mode.
(1) Indoor unit and refrigerant address indication
Indication pattern
Indicator name
Indication pattern
Indoor unit
address Refrigerant address
OPERATION
indicator lamp
(Green)
ON Flash
(1.0s ON/1.0s OFF)
TIMER indicator
lamp (Orange)
Address: tens place
(0.5s ON/0.5s OFF)
FILTER indicator
lamp (Red)
Address: ones place
(0.5s ON/0.5s OFF)
• Indoor unit address example
(Example) ADDRESS : 24
OPERATION
indicator lamp
(Green)
TIMER
indicator lamp
(Orange)
FILTER
indicator lamp
(Red)
10 sec
1 cycle 12 sec
8 sec
ON
OFF
0.5s 0.5s 0.5s 0.5s 0.5s 0.5s 0.5s 0.5s
0.5s 0.5s 0.5s 0.5s
ON
OFF
ON
OFF
ON
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• Refrigerant address example
(Example) ADDRESS : 30
OPERATION
indicator lamp
(Green)
TIMER
indicator lamp
(Orange)
FILTER
indicator lamp
(Red)
9 sec
1 cycle 12 sec
ON
OFF
1.0s 1.0s 1.0s
1.0s 1.0s 1.0s 1.0s
0.5s 0.5s 0.5s 0.5s 0.5s 0.5s
ON
OFF
ON
OFF
OFF
• Setting details
Function
number Item Setting number
01 Indoor unit address 00~63
02 Refrigeration address 00~99
For use with a remote controller, set all rotary switches to 0, and
refer to “7.1. Setting the address” for details.
All switches are set to 0 at the factory.
(2) Others
Indication pattern
Indicator Name Indication pattern
OPERATION indicator
lamp (Green)
Function number; tens place
(0.5s ON/0.5s OFF)
TIMER indicator lamp
(Orange)
Function number; ones place
(0.5s ON/0.5s OFF)
FILTER indicator lamp
(Red)
Setting number: (0 - 9)
(0.5s ON/0.5s OFF)
(Example) Function : 31, Setting number : 2
OPERATION
indicator lamp
(Green)
TIMER
indicator lamp
(Orange)
FILTER
indicator lamp
(Red)
11 sec
10 sec
9 sec
1 cycle 12 sec
ON
OFF
0.5s 0.5s
0.5s
0.5s
0.5s
0.5s
0.5s
0.5s
0.5s
0.5s 0.5s 0.5s
ON
OFF
ON
OFF
8. DECORATION PANEL INSTALLA-
TION
• Operate according to the installation Manual DECORATION
PANEL
.
• Be sure to confirm there is no gap between the panel and
main unit after installing the DECORATION PANEL.
9. TEST OPERATION
9.1. Test operation using PCB (Outdoor unit)
• Refer to the Installation Manual for the outdoor unit if
the PCB for the outdoor unit is to be used for the test
operation.
9.2. Test operation using Remote Controller
• Refer to the Installation Manual for the remote controller
unit to perform the test operation using the wireless remote
controller unit.
• When the air conditioner is being test run, the OPERATION
and TIMER indicators flash slowly at the same time.
10. 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 correctly?
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 completed? 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
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 control unit or
external device?
No operation
After installation is
completed, has the proper
operation and handling
been explained to the
user?
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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 display
Wired
Remote
Controller
Error
CODE
Error contents
OPERATION
lamp
(green)
TIMER
lamp
(orange)
FILTER
lamp
(red)
(1) (2)
Remote
controller
communication
error
(1) (4)
Anomalous
network
communications
(1) (6)
Parallel
communication
error
(3) (1) Power
frequency error
(3) (2)
Model
information
error/EEPROM
accession error
(4) (1)
Room
temperature
thermistor error
(4) (2)
Indoor heat
exchanger
temperature
thermistor error
(5) (1) Indoor fan motor
error
(5) (3) Drainage error
(9) (15) Outdoor 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
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