Toshiba MML-AP0074H2UL, MML-AP0184H2UL, MML-AP0244H2UL, MML-AP0094H2UL, MML-AP0124H2UL Installation Manual

Manuel d’installation 17

Français

Installation Manual 1

English

For commercial use

Pour usage commercial

Indoor Unit

Model name:

Floor Console Exposed Type

MML-AP0074H2UL
MML-AP0094H2UL
MML-AP0124H2UL
MML-AP0154H2UL
MML-AP0184H2UL
MML-AP0244H2UL

AIR CONDITIONER (MULTI TYPE)

Installation Manual

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Contents

1 Precautions for safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

2 Accessory parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

3 Selection of installation place. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

4 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

5 Drain piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

6 Refrigerant piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

7 Electrical connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

8 Applicable controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

9 How to change the discharge port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

10 Test run . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

11 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

12 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Please read this Installation Manual carefully before installing the Air Conditioner.

• This Manual describes the installation method of the indoor unit.

• For installation of the outdoor unit, follow the Installation Manual attached to the outdoor unit.

ADOPTION OF NEW REFRIGERANT

This Air Conditioner uses R410A an environmentally friendly refrigerant.

1 Precautions for safety

Installing, starting up, and servicing air--conditioning equipment can be hazardous due to system pressures,
electrical components, and equipment location (roofs, elevated structures, etc.).
Only trained, qualified installers and service mechanics should install, start--up, and service this equipment.
Untrained personnel can perform basic maintenance functions such as cleaning heat exchanger. All other
operations should be performed by trained service personnel.
Before working on the equipment, observe precautions in the literature and on tags, stickers, and labels attached
to the equipment.
Follow all safety codes. Wear safety glasses and work gloves. Keep quenching cloth and fire extinguisher nearby
during brazing. Use care in handling, rigging, and setting bulky equipment.
Read these instructions thoroughly and follow all warnings or cautions included in literature and attached to the
unit. Consult local building codes and National Electrical Code (NEC) for special requirements. Recognize safety
information. This is the safety--alert symbol . When you see this symbol on the unit and in instructions or
manuals, be alert to the potential for personal injury. Understand these signal words: DANGER, WARNING, and
CAUTION. These words are used with the safety--alert symbol.
DANGER identifies the most serious hazards which will result in severe personal injury or death. WARNING
signifies hazards which could result in personal injury or death. CAUTION is used to identify unsafe practices which
may result in minor personal injury or product and property damage. NOTE is used to highlight suggestions which
will result in enhanced installation, reliability, or operation.
The manufacturer shall not assume any liability for the damage caused by not observing the description of this
manual.

WARNING

• Only a qualified installer or service person is allowed to do installati on work.

Inappropriate installation may result in water leakage, electric shock or fire.

• Do not use any refrigerant different from the one specified for complement or replacement.

Otherwise, abnormally high pressure may be generated in the refrigeration cycle, which may result in a
failure or explosion of the product or an injury to your body.

• Connect ground wire. (grounding work)

Incomplete grounding may cause an electric shock.
Do not connect ground wires to gas pipes, water pipes, lightning rods or ground wires for telephone wires.

• Turn off all the circuit breaker before attempting any electrical work.

Failure to do so may cause electric shock.

• Install the refrigerant pipe securely during the installation work before ope rating the air conditioner.

If the air conditioner is operated with the valve open a nd without the refrigerant pipe, the compressor sucks air and
the refrigeration cycle is over pressurized, which may cause a burst or injury.

• When moving the air conditioner for the installation into another place, do not enter any gaseous matter

other than the specified refrigerant into the refrigeration cycle.

If air or any other gas is mixed in the refrigerant, the gas pressure in the refrigeration cycle becom es abnormally high
and it resultingly causes pipe burst and injuries on perso ns.

• Perform installation work properly according to the Installation Manual.

Inappropriate installation may result in water leakage, electric shock or fire.

• When the air conditioner is installed in a small room, provide appropriate measures to ensure that the

concentration of refrigerant leakage occur in the room does not exceed the critical level.

• Install the air conditioner securely in a loc ation where the base can sustain the weight adequately.

• Perform the specified installation work to guard against an earthquake.

If the air conditioner is not installed appropriately, accidents may occur due to the falling unit.

• If refrigerant gas has leaked during the installation work, ventilate the room immediately.

If the leaked refrigerant gas comes in contact with fire, no xious gas may generate.

• After the installation work, confirm that refrigerant gas does not leak.

If refrigerant gas leaks into the room and flows near a fire source, such as a cooking range, noxious gas migh t
generate.

• Electrical work must be performed by a qualified electrician in accordance with the Installation Manual. Use

an exclusive power supply for the air conditioner at the rated voltage.

An insufficient power supply capacity or inappropriate installation m ay cause fire.

• Use the specified wires for wiring connect the te rminals. Securely fix them to prevent external forces applied

to the terminals from affecting the ter minals.

• Conform to the regulations of the local electric company when wiring the power supply.

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EN

• For the refrigerant recovery work (collection of refrigerant from the pipe to the compressor), stop the
compressor before disconnecting the refrigerant pipe.

If the refrigerant pipe is disconnected while the compressor is workin g with the valve open, the compressor sucks air
and the refrigeration cycle is over pressurized, which may cause a burst or injury.

• Before carrying out the installation, mai ntenance, repair or removal work, set the circuit breaker to the OFF

position.
Otherwise, electric shocks may result.

• Do not touch the aluminum fin of the unit. You may injure you rself if you do so. If the fin must be touched for
some reason, first put on protective gloves and safety work clothing, and then proceed.

• Install the air conditioner securely in a location where the base can sustain the weight adequately. If the
strength is not enough, the unit may fall down resulting in injury.

• Install a circuit breaker that meets the specifications in the installation manu al and the stipulations in the
local regulations and laws.

• Install the circuit breaker where it can be easily accessed by the agent.

• Under no circumstances the power wire must not be extended. Connection trouble in the places where the

wire is extended may give rise to smoking and/or a fire.

• Upon completion of the installation work, tell the user where the circuit breaker is located. If the user does
not know where the circuit breaker is, he or she will not be able to turn it off in the event that trouble has
occurred in the air conditioner.

CAUTION

• This air conditioner adopts the new HFC refrigerant (R410A) which does not destroy ozone layer.

• The characteristics of R410A refrigerant are; easy to ab sorb water, oxidizing membrane or oil, and its pressure is
approx. 1.6 times higher than that of refrigerant R22. Accompanied with the new refrigerant, refrigerating oil has also
been changed. Therefore, during installation work, be sure that water, dust, former refrigerant, or refrigerating oil does
not enter the refrigerating cycle.

• To prevent charging an incorrect refrigerant a nd refrigerating oil, the sizes of connecting sections of charging port of
the main unit and installation tools are changed from those for the conventional refrigerant.

• Exclusive new tools are required for the new refrigerant (R410A).

• For connecting pipes, use new and clean piping designed for R410A, and make sure that water or dust does not
enter.

• Tighten the flare nut with a torque wr ench in the specified manner.
Excessive tightening of the flare nut may cause a crack in the flare nut after a long period, which may result in
refrigerant leakage.

• Wear heavy gloves during the installation work to avoid injury.

2 Accessory parts

Part name Q’ty Shape Usage

Installation Manual 1 This manual (Hand over to customers)

Heat insulating pipe 2 For heat insulation of pipe connecting section

Bushing 1 For protection of edge at control wire taking-in port

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3 Selection of installation place

Avoid installing in the following places.

Select a location for the indoor unit where the cool or warm air will circulate evenly.
Avoid installation in the following locations.

• Saline area (coastal area).

• Locations with acidic or alkaline atmospheres (such as areas with hot springs, factories where chemicals or
pharmaceuticals are made and places where the exhaust air from combustion appliances will be sucked into the
unit).
Doing so may cause the heat exchanger (its aluminum fins and copper pipes) and other parts to become
corroded.

• Locations with atmospheres consisting of mist of cutting oil or other types of machine oil.
Doing so may cause the heat exchanger to become corroded, mists caused by the blockage of the heat
exchanger to be generated, the plastic parts to be damaged, the heat insulators to peel off, and other such
problems to result.

• Locations where vapors from food oils are formed (such as kitchens where food oils are used).
Blocked filters may cause the air conditioner’s performance to deteriorate, condensation to form, the plastic parts
to be damaged, and other such problems to result.

• Locations near obstructions such as ventilation openings or lighting fixtures where the flow of the blown air will
be disrupted (a disruption of the air flow may cause the air conditioner’s performance to deteriorate or the unit to
shut down).

• Locations where an in-house power generator is used for the power supply.
The power line frequency and voltage may fluctuate, and the air conditioner may not work properly as a result.

• On truck cranes, ships or other moving conveyances.

• The air conditioner must not be used for special applications (such as for storing food, plants, precision
instruments or art works).
(The quality of the items stored may be degraded.)

• Locations where high frequencies are generated (by inverter equipment, in-house power generators, medical
equipment or communication equipment).
(Malfunctioning or control trouble in the air conditioner or noise may adversely affect the equipment’s operation.)

• Locations where there is anything under the unit installed that would be compromised by wetness.
(If the drain has become blocked or when the humidity is over 80%, condensation from the indoor unit will drip,
possibly causing damage to anything underneath.)

• In the case of the wireless type of system, rooms with the inverter type of fluorescent lighting or locations
exposed to direct sunlight.
(The signals from the wireless remote control may not be sensed.)

• Locations where organic solvents are being used.

• The air conditioner cannot be used for liquefied carbonic acid cooling or in chemical plants.

• Location near doors or windows where the air conditioner may come into contact with high-temperature, high­humidity outdoor air.
(Condensation may occur as a result.)

• Locations where special sprays are used frequently.

 Installation space Unit: in (mm)

Reserve sufficient space required for installation or service work.

 Filter cleaning sign term setting

The lighting term setup of the filter sign (Notification of filter cleaning) of the remote control can be changed
according to the condition of installation.
For setup method, refer to “Filter sign setting” in the Applicable controls of this Manual.

11.8"
(300)

or more

19.7" (500) or more

39.4" (1000)

or more

Front side

(In case of right direction piping)

Front side

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EN

4 Installation

CAUTION

Strictly comply with the following rules to prevent damage of the indoor units and human injury.

• Do not put a heavy article on the indoor unit or let a p erson get on it. (Even units are packaged)

• Carry in the indoor unit as it is packaged if possible. If it is ne cessary to carry the indoor unit unpacked, then use
buffering cloth or other material so as to not damage the unit.

• To move the indoor unit, hold the bottom face of the u nit only.
Do not apply force to the other parts (refrigerant p ipe, drain pan, foamed parts, resin parts or other parts).

• Have two or more people carry the package, and do not bundle it with plastic band at positions ot her than specified.

Install an indoor unit as described below.

1 Remove the air intake grille (4 hooks at top and bottom each)
2 Remove the fan guard (4 screws) for piping work.
3 Remove the front panel (2 screws) for wiring work

4 Start piping and wiring works.
5 Keep the front space of the indoor unit as wide as possible.

A wide space is required for maintenance and service works as then it is useful for distributing cool / hot air in
the room resulting in increase of cooling / heating effect.

6 Install the indoor unit horizontally or slanting a little rightward viewed from the front side.

Fan guard screws

<Good installation> <Poor installation>

Front panel screws

Front panel

Hock

Hock

Hock

Hock

Fan guard

Air intake grille

 External dimensions Unit: in (mm)

10.2" (260)

9.1" (230)

27.2" (690)

37.4" (950)

24.8" (630)

6.1" (155)

9.4" (240)

7.9" (200)

1.4" (35)

( )

5.2" (133)

17.3" (440)

2.2"

(57)

5.1" (130)

1.2" (30)

1.4" (35)

2.8" (70)

3.8" (97)

2.0" (50)

4.7" (120)

27.6" (700)

20.5" (520)

3.9" (100)

2.4" (61)

1.3" (34)

10.2" (258)

7.5" (190)

4.3" (110)

1.1" (27)

7.0" (177)

4.2" (106)

6.4" (162)

1.4" (35)

5.9" (150)

1.3" (33)

5.1" (130)

15.7" (400)

4.7" (120)

5.1" (130)

5.9" (150)

0.4" × 0.8" (10 × 20)
long hole

Operation switch section
(Sold separately)

Conduit pipe (including the power supply),
Drain pipe and Refrigerant pipe port
(2.0" × 3.9" (50 × 100) knockout hole)
(Both sides)

Model MML- A B

AP007, AP009,

AP012 type

Ø1/4"

(6.4)

Ø3/8"

(9.5)

AP015, AP018 type

Ø1/4" (6.4)

Ø1/2" (12.7)

AP024 type

Ø3/8" (9.5)

Ø5/8" (15.9)

Air discharge port

Air intake port

Hole for wall
fixing × 2

(with Ø0.87" (22)
knockout hole)

Power supply
cord hole
(Ø1.0" (26) knockout)
(Both sides)

Hole for wall fixing
(2- 0.5" × 1.0"
(12 × 25) long hole)

left side

Refrigerant pipe port
(Ø5.1" (130) knockout hole)

Conduit hole
for power supply cable
Ø7/8" (22.2)

Conduit hole (Knockout hole)
Ø7/8" (22.2)

Refrigerant pipe
connection port
Ø1/4" (6.4)
(Liquid side ØA)

Conduit hole positional drawing

Dimensions

Mounting hole (Floor)
(2- Ø0.4" (10))

Conduit pipe (including the power supply),
Drain pipe and Refrigerant pipe port
(2.0" × 3.9" (50 × 100) knockout hole)

Refrigerant pipe
connection port
Ø3/8" (9.5) (Gas side ØB)

Drain pipe connection port
(Ø0.8" (20))

Piping positional drawing

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 Fixing the indoor unit to wall

Fix the indoor unit to the wall as described below.

1 Fix four 0.3" (M8) anchor bolts to the wall, as

shown in the following figure.

2 Attach the bolts carefully to the upper two

anchor bolts, as shown in the following
figure.

3 Open the knockout hole at rear side of the

indoor unit with a screwdriver.

4 Hang the indoor unit to the anchor bolts.
5 Tighten the nuts to the two lower anchor

bolts.

Unit: in (mm)

 Fixing the indoor unit to floor

To fix the indoor unit to the floor, pass two anchor bolts
attached on the floor through a hole of the bottom plate
of the indoor unit. Tighten and fix it with the nuts.

Unit: in (mm)

 Installation of remote control

(Sold separately)

For installation of the wired remote control, follow the
Installation Manual attached with the remote control.

• Pull out the remote control cord together with the
refrigerant pipe or drain pipe.
Pass the remote control cord through upper side of
the refrigerant pipe and drain pipe.

• Do not leave the remote control at a place exposed
to direct sunlight and near a stove.

 Wireless remote control

The sensor of indoor unit with wireless remote control
can receive a signal from a distance within approx. 23’
(7 m). Based on this, determine a place where the
remote control can be operated and the installation
place.

• Operate the remote control, confirm that the indoor
unit receives a signal, and then install it.

• Keep it 3.3' (1 m) or more from devices such as
television, stereo etc.
(Disturbance of image or noise may generate.)

• To prevent malfunction, select a place away from
fluorescent light or direct sunlight.

• Two indoor units with wireless type remote control
can be installed in the same room.

27.6" (700)

4.9"

(125)

8.5" (215)

5.2"
(133)

17.3"
(440)

2.2"
(57)

20.5" (520)

Mount the upper two nuts as
shown in the figure below.

Tighten the lower two nuts after
the unit has been mounted.

0.04" to 0.08"
(1 to 2)

0.6" (15) MAX

Screwdriver

Knockout hole

5.9"
(150)

15.7" (400) 10.8" (275)

Rear

Anchor bolts (two at left and right)

Front

23’

(7

m) or

l

ess

5 Drain piping

CAUTION

• Following the Installation Manual, pe rform the drain piping work so that wat er is properly drained. Apply a
heat insulation so as not to cause a dew condensation.
Inappropriate piping work may result in water leakage in the room and wet furn iture.

• After opening the knockout hole, deburr the edge.
Burrs adhered to opening of the knockout hole may c auses an injury by touching it.

• Provide the indoor drain piping with proper heat insulation.

• Provide the area where the pipe connects to the indoor unit with proper heat insulation. Improper heat insulation
will cause condensation to form.

• The drain pipe must be sloping downward (at an angle of 1/100 or more), and do not run the pipe up and down
(arched shape) or allow it to form traps. Doing so may cause abnormal sounds.

• Restrict the length of the traversing drain pipe to 65.6’ (20 m) or less. For a long pipe, provide support brackets
at intervals of 4’11" to 6’7" (1.5 to 2 m) to prevent flapping.

• Install the collective piping as shown in the following figure.

• Do not provide any air vents. Otherwise, the drain water will spout, causing water to leak.

• Do not allow any force to be applied to the connection area with the drain pipe.

 Pipe material, size and insulator

The following materials for piping work and insulating process are procured locally.

Pipe material Hard vinyl chloride pipe, pipe elbow (Nominal inner diameter Ø0.8" (20 mm))
Insulator Foamed polyethylene foam, thickness: 0.4" (10mm) or more

Drain pan

Drain hose

Use adhesive for hard polyvinyl chloride pipe

Hard polyvinyl chloride pipe

Elbow

Insulation

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 Piping method

The drain pipe and the refrigerant pipe can be connected to left, right, rear or bottom side arbitrarily depending on
the installation location.
Select a set knockout hole referring to the following figure.

 Connecting drain pipe

Insert the drain hose into the connector until the hose can go no farther.

REQUIREMENT

• Connect the hard vinyl chloride pipes by using adhesive agents for vinyl chloride so that water does not leak.

• It takes some time to dry and indurate the adhesive agent. (Refer to th e manual of adhesive agent.) Do not apply any
extra force on the connecting section until the adhesive ag ent is dried.

 Check the draining

• In the test run, check that water drain is properly performed and that water does not leak from the connecting
part of the pipes. Check draining also when installed in heating period.

• Remove the cover from the bottom side of the heat exchanger. Pour water to the drain pan. Confirm that water
drains well and does not leak from the drain hose connecting part.

• Once the drain is confirmed, attach back the cover in the way it was.

CAUTION

Water must be poured slowly.

If water is swiftly poured, water may spatter across the inside of the indoor unit. It may cause malfunction of the unit.

For left side

Hole for control wire

For rear side For right side

Conduit pipe (including the power supply),
drain hose and refrigerant pipe port

Hole for control wire

Conduit pipe (including the
power supply), drain hose
and refrigerant pipe port

Conduit pipe (including the
power supply), drain hose
and refrigerant pipe port

Conduit pipe (including the
power supply), drain hose
and refrigerant pipe port

For bottom

side

6 Refrigerant piping

CAUTION

When the refrigerant pipe is long, provide support
brackets at intervals of 8’2” to 9’10” (2.5 to 3 m) to clamp
the refrigerant pipe. Otherwise, abnormal sound may be
generated.
Use the flare nut attached with the indoor unit or R410A
flare nut.

 Permissible piping length and

height difference

They vary depending on the outdoor unit. For details,
refer to the Installation Manual attached to the outdoor
unit.

 Pipe size Unit: in (mm)

 Connecting refrigerant piping

Flaring

1 Cut the pipe with a pipe cutter.

Remove burrs completely. (Remaining burrs may
cause gas leakage.)

2 Insert a flare nut into the pipe, and flare the

pipe.

Use the flare nut provided with the unit or the one
used for the R410A refrigerant. The flaring
dimensions for R410A are different from the ones
used for the conventional R22 refrigerant. A new
flare tool manufactured for use with the R410A
refrigerant is recommended, but the conventional
tool can still be used if the projection margin of the
copper pipe is adjusted to be as shown in the
following table.

Projection margin in flaring: B

Unit: in (mm)

Flaring diameter size: A

Unit: in (mm)

* In case of flaring for R410A with the conventional

flare tool, pull it out approx. 0.02” (0.5 mm) more than
that for R22 to adjust to the specified flare size. The
copper pipe gauge is useful for adjusting projection
margin size.

• The sealed gas was sealed at the atmospheric
pressure so when the flare nut is removed, there will
be no “whooshing” sound: This is normal and is not
indicative of trouble.

• Use two spanners to connect the indoor unit pipe.

Model MML-

Pipe size

Gas side Liquid side

AP007 to AP012 3/8" (9.5) 1/4" (6.4)

AP015, AP018 1/2" (12.7) 1/4" (6.4)

AP024 5/8" (15.9) 3/8" (9.5)

Outer dia. of
copper pipe

R410A tool used

Conventional

tool used

1/4" to 5/8"

(6.4 to 15.9)

0 to 0.02"
(0 to 0.5)

0.04" to 0.06"
(1.0 to 1.5)

Outer dia. of copper pipe A

+0
–0.02" (0.4)

1/4" (6.4) 0.36" (9.1)

3/8" (9.5) 0.52" (13.2)
1/2" (12.7) 0.65" (16.6)
5/8" (15.9) 0.78" (19.7)

B

A

Work using two spanners

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• Use the tightening torque levels as listed in the
following table.

• Tightening torque of flare pipe connections.
Pressure of R410A is higher than that of R22.
(Approx. 1.6 times) Therefore, using a torque
wrench, tighten the flare pipe connecting sections
which connect the indoor and outdoor units of the
specified tightening torque.
Incorrect connections may cause not only a gas leak,
but also a trouble of the refrigeration cycle.

CAUTION

Tightening with an excessive torque may crack the nut
depending on installation conditions.

 Airtight test / air purge, etc.

For air tightness test, adding refrigerant, refer to the
Installation Manual attached to the outdoor unit.

CAUTION

Do not supply power to the indoor unit until the airtight
test and vacuuming are completed. (If the indoor unit is
powered on, the pulse motor valve is fully closed, which
extends the time for vacuuming.)

 Open the valve fully

Open the valve of the outdoor unit fully.

 Heat insulation process

Apply heat insulation for the pipes separately at liquid
side and gas side.

• For the heat insulation to the pipes at gas side, use
the material with heat-resisting temperature 248 °F
(120 °C) or higher.

• To use the attached heat insulation pipe, apply the
heat insulation to the pipe connecting section of the
indoor unit securely without gap.

REQUIREMENT

Insulate the refrigerant pipe in the indoor unit se curely up
to the point shown in the following figure.

Outer dia. of connecting

pipe (in (mm))

Tightening torque

(ft•lbs (N•m))

1/4" (6.4) 10 to 13 (14 to 18)

3/8" (9.5) 24 to 31 (33 to 42)
1/2" (12.7) 37 to 46 (50 to 62)
5/8" (15.9) 46 to 57 (63 to 77)

Adhesive tape

Heat insulator
(accessory)

Heat insulator

Gas pipeLiquid pipe

7 Electrical connection

WARNING

1. Use predefined wire and connect them certainly.
Keep the connecting terminal free from external
force.

Improper wire connection or clamping may result in
exothermic, fire or malfunction.

2. Connect ground wire. (grounding work)
Incomplete grounding cause an electric shock.
Do not connect ground wires to gas pipes, water
pipes, lightning rods or ground wires for telephone
wires.

3. Install appliance in accordance with national

wiring regulations.

Capacity shortage of circuit breaker or incomplete
installation may cause an electric shock or a fire.

CAUTION

• Consult local building codes, NEC (National Electrical
Code) or CEC (Canadian Electrical Code) for special
requirements.

• If incorrect / incomplete wiring is carried out, it will
cause an electrical fire or smoke.

• If circuit breaker is not installed, an electric shock may
be caused.

• Use the cord clamps attached to the product.

• Do not damage or scratch the conductive core and
inner insulator of power and control wires when
peeling them.

• Use the power cord and control wire of specified
thickness, type, and protective devices required.

• Do not connect 208 / 230 V power to the terminal
blocks (U1, U2, A, B etc.) for control wiring.
(Otherwise, the system will fail.)

• Perform the electric wiring so that it does not come to
contact with the high-temperature part of the pipe.
The coating may melt resulting in an accident.

• Do not turn on the circuit breaker of the indoor unit
until vacuuming of the refrigerant pipes is completed.

REQUIREMENT

• For power supply wiring, strictly conform to the Local
Regulation in each country.

• Run the refrigerant piping line and control wiring line in
the same line.

 Power supply wire and

control wires specifications

Power supply wire and control wires are locally
procured.
For the power supply specifications, follow the table
below. If the capacity is too low, overheat or seizure
may occur.

Indoor unit power supply

For the power supply of the indoor unit, prepare the
exclusive power supply separated from that of the
outdoor unit.

▼ Power supply

Control wiring, Central control wiring

• 2-core with non-polarity wires are used for the
control wiring between indoor unit and outdoor unit
and Central control wiring.

• To prevent noise trouble, use 2-core shielded wire.

• The length of the communication line means the total
length of the control wire length between indoor and
outdoor units added with the central control wire
length.

Power supply 208 / 230-1-60

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EN

Power supply wire

Recommended wire diameter and wire length for power supply wire.

▼ Electric characteristics

MCA : Minimum Circuit Amps

MOCP : Maximum Overcurrent Protection (Amps)

Control wire

Remote control wiring

2-core with non-polarity wire is used for wiring of the remote control wiring and group remote controls wiring.

NOTE

• Use copper supply wire.

• Use UL wire rated 600 V for the power supply.

• Use UL wire rated 300 V for the remote control wires and control wires.

Power supply wiring

Wire size: 2 × AWG12
Ground 1 × AWG12 or thicker

Up to 164’1” (50 m)

Model Power Supply

Voltage Range (V) MCA MOCP

Min Max (A) (A )

MML-AP0074H2UL

208 / 230 V-1-60 Hz 187 253

0.4 15
MML-AP0094H2UL 0.4 15
MML-AP0124H2UL 0.6 15
MML-AP0154H2UL 0.6 15
MML-AP0184H2UL 0.7 15
MML-AP0244H2UL 0.7 15

Control wiring between indoor units, and outdoor unit (2-core
shielded wire)

Wire size

(Up to 3280’10” (1000 m)) AWG16

(Up to 6561’8” (2000 m)) AWG14

Remote control wiring, remote control inter-unit wiring Wire size: AWG20

Total wire length of remote control wiring and remote control
inter-unit wiring = L + L1 + L2 + … Ln

In case of wired type only Up to 1640’5” (500 m)
In case of wireless type included Up to 1312’4” (400 m)

Total wire length of remote control inter-unit wiring = L1 + L2 + … Ln Up to 656’2” (200 m)

L1

L

L2 Ln

Indoor unit

Remote control inter-unit wiring

Indoor unit Indoor unit Indoor unit

Remote

control

(Max. 8 units)

Remote
control
wiring

CAUTION

Do not put the remote control wires and power supply wires (AC208 / 230 V) in the same conduit. Doing so may cause
trouble in the control system due to noise or other factors.

 Wiring between indoor and outdoor units

NOTE

An outdoor unit connected with control wiring between indoor and ou tdoor units wire becomes automatically the header
unit.

▼ Wiring example

U1U2

U1U2U3U4L1L2 L3 N U5U6

L1L2 A BU1U2L1L2 A B U1U2L1L2 A B U1U2L1L2 A B

A B

U1U2U3U4L1L2 L3 N U5U6

A B A B

Outdoor Power supply

Ground
terminal

Ground

terminal

Outdoor Power supply

Circuit breaker Circuit breaker

Header outdoor unit

Follower outdoor unit

Control wiring between outdoor units

Control wiring between indoor and outdoor units

Control wiring between indoor units

Indoor unit

Indoor unit Indoor unit

Indoor unit

Ground Ground Ground Ground

Remote

control

Remote

control

Remote

control

Indoor
power
supply

Circuit
breaker

208 /
230-1-60

Disconnect
switch per NEC

Disconnect
switch per
NEC

Disconnect
switch per
NEC

Disconnect
switch per
NEC

Group control

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 Wire connection

REQUIREMENT

• Connect the wires matching the terminal numbers.
Incorrect connection can cause problems.

• Pass the wires through the bushing of wire connection
holes of the indoor unit.

• Keep a margin (Approx. 3.9" (100 mm)) on a wire to
hang down the electrical control box for servicing or
other purpose.

• The low-voltage circuit is provided for the remote
control. (Do not connect it to high-voltage circuit)

• Run the power supply wire through a conduit pipe up
to the conduit mounting plate in the indoor unit.
(It is recommended to use a flexible conduit pipe.)

• Draw in the wire from the pipe hole (Knockout hole).

• Provide adequate length to the wire and fix it with
cord clamp as shown in the figure.

Unit: in (mm)

CAUTION

Firmly tighten the screws of the terminal block.

Keep the wire length as shown in figure below when it
is connected to the terminal block.

 Remote control wiring

Strip off approx. 0.4" (9 mm) the wire to be connected.

▼ Wiring diagram

 Address setup

Set up the addresses as per the Installation Manual
supplied with the outdoor unit.

L2L1

BA

Indoor / Outdoor control wire
Remote control
terminal block

Power supply
terminal block

Electrical control box

Ground screw

Cord clamp

Power supply wire

Remote control wire

Control wire
between indoor
and outdoor units

L1L

2

0.8" (20)

1.2" (30)

0.4" (10)

Ground wire

0.08" (2) or less

Power supply wires and control
wire

A
B

A
B

Terminal block

Remote
control unit

Terminal block for
remote control wiring of
indoor unit

Remote control wire
(Locally procured)

 Installation procedure for Single port type Flow Selector unit

1 Remove the two fixing screws inside of the

discharge port.

2 Insert your hand into the discharge port,

push up the back side a little, and then
remove the discharge port from the hooks at
rear side.

3 Remove the 3 screws that fix the switch box.

4 Slightly lift up the front of the switch box and

remove it by pushing toward the top while
keeping it tilted.

5 Connect the Power supply and

communication lead wire of the Single port
type Flow Selector unit to CN081.

Switch box

CN081

FS unit lead wire

FS unit power
supply lead wire

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EN

8 Applicable controls

REQUIREMENT

When the air conditioner is used for the first time, it will
take some time after the power has been turned on
before the remote control becomes available for
operations: This is normal and is not indicative of any
problems.

• Concerning the automatic addresses (The automatic
addresses are set up by performing operations on the
outdoor interface circuit board.)
While the automatic addresses are being set up, no
remote control operations can be performed. Set up
takes up to 10 minutes (usually about 5 minutes).

• When the power is turned on after automatic address
setup It takes up to 10 minutes (usually about 3
minutes) for the outdoor unit to start operating after
the power has been turned on.

Before the air conditioner is shipped from the factory, all
units are set to [STANDARD] (factory default). If
necessary, change the indoor unit settings.
The settings are changed by operating the wired remote
control.
* The settings cannot be changed by using only a

wireless remote control, simple remote control or
group control remote control by itself so install a wired
remote control separately as well.

 Basic procedure for changing

settings

Change the settings while the air conditioner is not
working. (Stop the air conditioner before changing

the settings.)

CAUTION

Set only the CODE No. shown in the following table: Do
NOT set any other CODE No.
If a CODE No. not listed is set, it may not be possible to
operate the air conditioner or other troubles with the
product may result.

1 Push and hold button and “TEMP.”

button simultaneously for at least 4
seconds. After a while, the display flashes
as shown in the figure. Confirm that the
CODE No. is [01].

If the CODE No. is not [01], push button to clear
the display content, and repeat the procedure from
the beginning. (No operation of the remote
control is accepted for a while after button is
pushed.)
(While air conditioners are operated under the
group control, “ALL” is displayed first. When

is pushed, the indoor unit number

displayed following “ALL” is the header unit.)

1

6

1
3

2

5

4

(* Display content varies with the indoor unit
model.)

2 Each time button is pushed, indoor

unit numbers in the control group change
cyclically. Select the indoor unit to change
settings for.
The fan of the selected unit runs and the
louvers start swinging. The indoor unit for
change settings can be confirmed.

3 Specify CODE No. [ ] with “TEMP.” /

buttons.

4 Select SET DATA [ ] with “TIME” /

buttons.

5 Push button. When the display changes

from flashing to lit, the setup is completed.

• To change settings of another indoor unit,
repeat from Procedure

2.

• To change other settings of the selected indoor
unit, repeat from Procedure

3.

Use button to clear the settings. To make
settings after button was pushed, repeat from
Procedure

2.

6 When settings have been completed, push

button to determine the settings.

When button is pushed, flashes and
then the display content disappears and the air
conditioner enters the normal stop mode.
(While is flashing, no operation of the
remote control is accepted.)

 Filter sign setting

According to the installation condition, the filter sign
term (Notification of filter cleaning) can be changed.
Follow to the basic operation procedure
(

1 → 2 → 3 → 4 → 5 → 6).

• For the CODE No. in Procedure

3, specify [01].

• For the [SET DATA] in Procedure

4, select the SET

DATA of filter sign term from the following table.

 To secure better effect of

heating

When it is difficult to obtain satisfactory heating due to
installation place of the indoor unit or structure of the
room, the detection temperature of heating can be
raised. Also use a circulator or other machinery to
circulate heat air near the ceiling.
Follow to the basic operation procedure
(

1 → 2 → 3 → 4 → 5 → 6).

• For the CODE No. in Procedure

3, specify [06].

• For the set data in Procedure

4, select the SET

DATA of shift value of detection temperature to be
set up from the following table.

SET DATA Filter sign term

0000 None

0001

150 H

(Factory default)

0002 2500 H
0003 5000 H
0004 10000 H

SET DATA Detection temperature shift value

0000

No shift

(Factory default)

0001 +1.8 °F (+1 °C)
0002 +3.6 °F (+2 °C)
0003 +5.4 °F (+3 °C)
0004 +7.2 °F (+4 °C)
0005 +9.0 °F (+5 °C)
0006 +10.8 °F (+6 °C)

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 Remote control sensor

The temperature sensor of the indoor unit senses room
temperature usually. Set the remote control sensor to
sense the temperature around the remote control.
Select items following the basic operation procedure
(

1 → 2 → 3 → 4 → 5 → 6 ).

• Specify [32] for the CODE No. in Procedure

3.

• Select the following data for the SET DATA in
Procedure

4.

When flashes, the remote control sensor is
defective.
Select the SET DATA [0000] (not used) or replace the
remote control.

 Group control

In a group control, a remote control can control up to
maximum 8 units.

• The wired remote control only can control a group
control. The wireless remote control is unavailable
for this control.

• For wiring procedure and wires of the individual line
(Identical refrigerant line) system, refer to “Electrical
Connection” in this Manual.

• Wiring between indoor units in a group is performed
in the following procedure.

• Connect the indoor units by connecting the remote
control wires from the remote control terminal blocks
(A, B) of the indoor unit connected with a remote
control to the remote control terminal blocks (A, B) of
the other indoor unit. (Non-polarity)

• For address setup, refer to the Installation Manual
attached to the outdoor unit.

SET DATA 0000 0001

Remote control
sensor

Not used

(Factory default)

Used

9 How to change the discharge port

The air discharging direction of the indoor unit has been set to forward direction as factory default.
However it is possible to change to upward direction.
Change the discharging direction according to conditions of the room or requirement by the customers.

1 Remove the two fixing screws inside of the

discharge port.

2 Insert your hand into the discharge port,

push up the back side a little, and then
remove the discharge port from the hooks at
rear side.

3 Lift up the discharge port upward and

remove it.

4 Upend the discharge port and mount it to the

indoor unit. To mount the discharge port,
hook the four hooks (two at rear and bottom
side each).

5 Fix the discharge port with the removed

fixing screws securely.

CAUTION

Do not drop the fixing screws to the inside of the
unit.

In cooling operation

In cooling operation, use the air conditioner with
upward direction of air discharge so that cold air is
spread over the whole room.

In heating operation

In heating operation, use the air conditioner with
downward direction of air discharge so that hot air
reaches at the foot.

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EN

10Test run

 Before test run

• Before turning on the power supply, carry out the
following procedure.

1) By using 500 V-megger, check that resistance
of 1 MΩ or more exists between the terminal
block L to N and the ground.
If resistance of less than 1 MΩ is detected, do
not run the unit.

2) Check the valve of the outdoor unit being
opened fully.

• To pr otect the compressor at activation time, leave
power-ON for 12 hours or more before operating.

• Do not press the electromagnetic contactor to
forcibly perform a test run. (This is very dangerous in
case the protective device does not work.)

• Before starting a test run, set addresses by following
the Installation Manual supplied with the outdoor
unit.

 Execute a test run

• When a fan operation is to be performed for an
individual indoor unit, turn off the power, short CN72
on the circuit board, and then turn the power back
on. (First set the operating mode to “fan,” and then
operate.) When the test run has been performed
using this method, do NOT forget to release the
shorting of CN72 after the test run is completed.

Operate the unit with the wired remote control as usual.
For the procedure of the operation, refer to the
attached to the outdoor unit Owner’s Manual.
A forced test run can be executed in the following
procedure even if the operation stops by turning the
thermostat - OFF.
In order to prevent a serial operation, the forced test
run is released after 60 minutes have passed and
returns to the usual operation.

CAUTION

Do not use the forced test run for cases other than the
test run because it applies an excessive load to the
devices.

Wired remote control

1 Push button for 4 seconds or more.

[TEST] is displayed on the display part and
the selection of mode in the test mode is
permitted.

2 Push button.
3 Select the operation mode with

button, [ Cool] or [ Heat].

• Do not run the air conditioner in a mode other
than [ Cool] or [ Heat].

• The temperature controlling function does not
work during test run.

• The detection of error is performed as usual.

4 After the test run, push button to

stop a test run.

(Display part is same as procedure 1.)

5 Push button to cancel (release from) the

test run mode.

([TEST] disappears on the display and the status
returns to a normal.)

2, 4
3

1,5

Wireless remote control

(TCB-AX32-UL)

1 When TEMPORARY button is pushed for 10

seconds or more, “Pi!” sound is heard and
the operation changes to a forced cooling
operation. After approx. 3 minutes, a cooling
operation starts forcedly.

Check cool air starts blowing. If the operation does
not start, check wiring again.

2 To stop a test operation, push TEMPORARY

button once again (Approx. 1 second).

• Check wiring / piping of the indoor and outdoor
units in forced cooling operation.

TEMPORARY button

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11 Maintenance

<Daily maintenance>

▼ Cleaning of air filter

If is displayed on the remote control, maintain the air
filter.

1 Push the button to stop the

operation, then turn off the circuit breaker.

2 Take out the air filter.

• Push down the upper part of the air intake grille
slightly, and then pull it toward you to remove it.

• Take out the air filter inside the air intake grille.

• Cleaning with water or vacuum cleaner

• If dirt is heavy, clean the air filter by tepid
water with neutral detergent or water.

• After cleaning with water, dry the air filter
sufficiently in a shade place.

• Mount the air filter.

3 Turn on the circuit breaker, then push the

button on the remote control to start

the operation.

4 After cleaning, push .

display disappears.

CAUTION

• Do not start the air conditioner while leaving air filter
removed.

• Push the filter reset button. ( indication will be turn
off.)

4

1, 3

12Troubleshooting

 Confirmation and check

When an error occurs in the air conditioner, an error
code and indoor UNIT No. appear on the display part
of the remote control.
The error code is only displayed during the operation.
If the display disappears, operate the air conditioner
according to the following “Confirmation of error log” for
confirmation.

 Confirmation of error log

When an error occurs on the air conditioner, the error
log can be confirmed with the following procedure.
(The error log is stored in memory up to 4 errors.)
The log can be confirmed from both operating status
and stop status.

1 When and buttons are pushed

simultaneously for 4 seconds or more, the
following display appears.

If is displayed, the mode enters in the error log
mode.

•[01: Order of error log] is displayed in CODE

No..

• [Error code] is displayed in CHECK.

• [Indoor unit address in which an error occurred]
is displayed in Unit No..

2 Every pushing of button used to set

temperature, the error log stored in memory
is displayed in order.

The numbers in CODE No. indicate CODE No.
[01] (latest) → [04] (oldest).

REQUIREMENT

Do not push button because all the error log of the
indoor unit will be deleted.

3 After confirmation, push button to return

to the usual display.

Error code Indoor UNIT No. in

which an error occurred

3

2

1

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EN

 Check codes and parts to be checked

Check method

On the remote control (Wired remote control, Central control remote control) and the interface P.C. board of the
outdoor unit (I/F), a check display LCD (Remote control) or 7-segment display (on the outdoor interface P.C. board)
to display the operation is provided. Therefore the operation status can be known. With this self-diagnosis function,
a trouble or position with error of the air conditioner can be found as shown in the table below.

Check code list

The following list shows each check code. Find the check contents from the list according to part to be checked.

• To check from indoor remote control: See “Wired remote control display” in the list.

• To check from outdoor unit: See “Outdoor 7-segment display” in the list.

• To check from indoor unit with a wireless remote control: See “Sensor block display of receiving unit” in the list.

IPDU : Intelligent Power Drive Unit

: Lighting, : F lashing, : Goes off
ALT : Flashing is alternately when there are two flashing LED.
SIM : Simultaneous flashing when there are two flashing LED.

Check code Wireless remote control

Check code name Judging device

Wired remote

control display

Outdoor 7-segment display

Sensor block display of

receiving unit

Auxiliary code

Operation

Timer

Ready

Flash

E01 — —

Communication error between indoor and remote

control

(Detected at remote control side)

Remote control

E02 — — Remote control transmission error Remote control

E03 — —

Communication error between indoor and remote

control (Detected at indoor side)

Indoor

E04 — —

Communication circuit error between indoor /

outdoor (Detected at indoor side)

Indoor

E06 E06

No. of indoor units in which
sensor has been normally
received

Decrease of No. of indoor units I/F

—E07 —

Communication circuit error between indoor /

outdoor (Detected at outdoor side)

I/F

E08 E08 Duplicated indoor addresses Duplicated indoor addresses Indoor / I/F
E09 — — Duplicated header remote controls Remote control
E10 — — Communication error between indoor MCU Indoor

E12 E12

01: Indoor / Outdoor

communication

02: Communication between

outdoor units

Automatic address start error I/F

E15 E15 — Indoor is nothing during automatic addressing I/F

E16 E16

00: Capacity over
01 ~:No. of connected units

Capacity over / No. of connected indoor units

Combined capacity of indoor units exceeds 120% of

combined capacity of outdoor units.

I/F

E18 — — Communication error between indoor units Indoor

E19 E19

00: Header is nothing
02: Two or more header units

Outdoor header units quantity error I/F

E20 E20

01: Outdoor of other line

connected

02: Indoor of other line connected

Other line connected during automatic

address

I/F

E23 E23 —

Sending error in communication between

outdoor units

I/F

E25 E25 — Duplicated follower outdoor addresses I/F

E26 E26

No. of outdoor units which
received signal normally

Decrease of No. of connected outdoor units I/F

E28 E28 Detected outdoor unit number Follower outdoor unit error I/F

E31 E31 IPDU communication error I/F

F01 — — ALT Indoor TCJ sensor error Indoor
F02 — — ALT Indoor TC2 sensor error Indoor
F03 — — ALT Indoor TC1 sensor error Indoor
F04 F04 — ALT TD1 sensor error I/F
F05 F05 — ALT TD2 sensor error I/F

F06 F06

TE1 sensor
TE2 sensor

ALT

TE1 sensor error
TE2 sensor error

I/F

F07 F07 — ALT TL sensor error I/F
F08 F08 — ALT TO sensor error I/F
F10 — — ALT Indoor TA sensor error Indoor
F12 F12 — ALT TS1 sensor error I/F

F13 F13

01: Comp. 1 side
02: Comp. 2 side
03: Comp. 3 side

ALT TH sensor error IPDU

F15 F15 — ALT Outdoor temp. sensor miswiring (TE1, TL) I/F
F16 F16 — ALT Outdoor pressure sensor miswiring (Pd, Ps) I/F
F22 F22 — ALT TD3 error I/F
F23 F23 — ALT Ps sensor error I/F
F24 F24 — ALT Pd sensor error I/F
F29 — — SIM Indoor other error Indoor
F31 F31 — SIM Indoor EEPROM error I/F

H01 H01

01: Comp. 1 side
02: Comp. 2 side
03: Comp. 3 side

Compressor break down IPDU

H02 H02

01: Comp. 1 side
02: Comp. 2 side
03: Comp. 3 side

Compressor trouble (lock) IPDU

H03 H03

01: Comp. 1 side
02: Comp. 2 side
03: Comp. 3 side

Current detect circuit system error IPDU

H05 H05 — TD1 miswiring I/F
H06 H06 — Low pressure protective operation I/F
H07 H07 — Oil level down detective protection I/F

H08 H08

01: TK1 sensor error
02: TK2 sensor error
03: TK3 sensor error
04: TK4 sensor error

Oil level detective temp sensor error I/F

H15 H15 — TD2 miswiring I/F

Check code Wireless remote control

Check code name Judging device

Wired remote

control display

Outdoor 7-segment display

Sensor block display of

receiving unit

Auxiliary code

Operation

Timer

Ready

Flash

A3-IPDU

Fan

IPDU

123

01 

02 

03 

04 

05 

06 

07 

08 

09 

0A 

0B  

0C 

0D 

0E  

0F  

 : IPDU error

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H16 H16

01: TK1 oil circuit system error
02: TK2 oil circuit system error
03: TK3 oil circuit system error
04: TK4 oil circuit system error

Oil level detective circuit error I/F

H25 H25 — TD3 miswiring I/F
L03 — — SIM Indoor center unit duplicated Indoor
L04 L04 — SIM Outdoor line address duplicated I/F

L05 — — SIM

Duplicated indoor units with priority

(Displayed in indoor unit with priority)

I/F

L06 L06 No. of indoor units with priority SIM

Duplicated indoor units with priority

(Displayed in unit other than indoor unit with priority)

I/F

L07 — — SIM Group line in individual indoor unit Indoor
L08 L08 — SIM Indoor group / Address unset Indoor, I/F
L09 — — SIM Indoor capacity unset Indoor
L10 L10 — SIM Outdoor capacity unset I/F
L17 L17 — SIM Outdoor unit model unmatch error I/F
L20 — — SIM Duplicated central control addresses Indoor
L28 L28 — SIM Over No. of connected outdoor units I/F

L29 L29 SIM No. of IPDU error I/F

L30 L30 Detected indoor address SIM Indoor outside interlock Indoor

— L31 — — Extended I/C error I/F
P01 — — ALT Indoor fan motor error Indoor
P03 P03 — ALT Discharge temp. TD1 error I/F

P04 P04

01: Comp. 1 side
02: Comp. 2 side
03: Comp. 3 side

ALT High-pressure SW system operation IPDU

P05 P05

00: Detected phase loss

ALT

Phase loss error / interruption of power supply

I/F

01: Comp. 1 side
02: Comp. 2 side
03: Comp. 3 side

Inverter DC voltage (Vdc) error

P07 P07

01: Comp. 1 side
02: Comp. 2 side
03: Comp. 3 side

ALT Heat sink overheat error IPDU, I/F

P10 P10 Detected indoor address ALT Indoor overflow error Indoor
P12 — — ALT Indoor fan motor error or duct setting miss Indoor
P13 P13 — ALT Outdoor liquid back detection error I/F

P15 P15

01: TS condition
02: TD condition

ALT Gas leak detection I/F

P17 P17 — ALT Discharge temp. TD2 error I/F

Check code Wireless remote control

Check code name Judging device

Wired remote

control display

Outdoor 7-segment display

Sensor block display of

receiving unit

Auxiliary code

Operation

Timer

Ready

Flash

A3-IPDU

Fan

IPDU

123

01 

02 

03 

04 

05 

06 

07 

08 

09 

0A 

0B  

0C 

0D 

0E  

0F  

 : IPDU error

Error detected by TCC-LINK central control device

TCC-LINK : TOSHIBA Carrier Communication Link.

P18 P18 — ALT Discharge temp. TD3 error I/F
P19 P19 Detected outdoor unit number ALT 4-way valve inverse error I/F
P20 P20 — ALT High-pressure protective operation I/F

P22 P22

0 :IGBT circuit
1 :Location detection circuit

error
3 :Motor lock-up error
4 :Motor current was

detected.
C : Abnormal temperature was

detected by the TH sensor.
D : TH sensor error
E :Inverter DC voltage error

(outdoor unit fan)

Caution)
Although letters 0 to F appear at
locations indicated by “ ”,
please ignore them.

ALT Outdoor fan IPDU error IPDU

P26 P26

01: Comp. 1 side
02: Comp. 2 side
03: Comp. 3 side

ALT G-TR short protection error IPDU

P29 P29

01: Comp. 1 side
02: Comp. 2 side
03: Comp. 3 side

ALT Comp position detective circuit system error IPDU

P31 P31 — ALT

Other indoor unit error
(Group follower unit error)

Indoor

Check code Wireless remote control

Check code name Judging device

Wired remote

control display

Outdoor 7-segment display

Sensor block display of

receiving unit

Auxiliary code

Operation

Timer

Ready

Flash

C05 — — — Sending error in TCC-LINK central control device TCC-LINK
C06 — — — Receiv ing error in TCC-LINK central control device TCC-LINK

C12 — — —

Batch alarm of general-purpose equipment control
interface

General-purpose

equipment I/F

P30

Differs according to error contents of unit with occurrence of alarm Group control branching unit error

TCC-LINK

— — (L20 is displayed) Duplicated central control addresses

Check code Wireless remote control

Check code name Judging device

Wired remote

control display

Outdoor 7-segment display

Sensor block display of

receiving unit

Auxiliary code

Operation

Timer

Ready

Flash

29-EN 30-EN

+00EB99808701-1_01EN.book Page 15 Thursday, June 23, 2016 11:5 7 AM

–16–

EN

31-EN 32-EN

Warnings on refrigerant leakage

Check of Concentration Limit

The room in which the air conditioner is to be installed
requires a design that in the event of refrigerant gas
leaking out, its concentration will not exceed a set limit.

The refrigerant R410A which is used in the air conditioner is
safe, without the toxicity or combustibility of ammonia, and is
not restricted by laws to be imposed which protect the ozone
layer. However, since it contains more than air, it poses the
risk of suffocation if its concentration should rise excessively.
Suffocation from leakage of R410A is almost non-existent.
With the recent increase in the number of high concentration
buildings, however, the installation of multi air conditioner
systems is on the increase because of the need for effective
use of floor space, individual control, energy conservation by
curtailing heat and carrying power etc.
Most importantly, the multi air conditioner system is able to
replenish a large amount of refrigerant compared with
conventional individual air conditioners. If a single unit of the
multi conditioner system is to be installed in a small room,
select a suitable model and installation procedure so that if
the refrigerant accidentally leaks out, its concentration does
not reach the limit (and in the event of an emergency,
measures can be made before injury can occur).
In a room where the concentration may exceed the limit,
create an opening with adjacent rooms, or install mechanical
ventilation combined with a gas leak detection device.
The concentration is as given below.

The concentration limit of R410A which is used in multi air
conditioners is 0.019 lbs/ft

3

(0.3 kg/m3).

NOTE 1 :

If there are 2 or more refrigerating systems in a single
refrigerating device, the amounts of refrigerant should be as
charged in each independent device.

For the amount of charge in this example:

The possible amount of leaked refrigerant gas in rooms A,
B and C is 22 lbs (10 kg).
The possible amount of leaked refrigerant gas in rooms
D, E and F is 33 lbs (15 kg).

NOTE 2 :

The standards for minimum room volume are as
follows.

(1) No partition (shaded portion)

(2) When there is an effective opening with the adjacent

room for ventilation of leaking refrigerant gas (opening
without a door, or an opening 0.15% or larger than the
respective floor spaces at the top or bottom of the door).

(3) If an indoor unit is installed in each partitioned room and

the refrigerant piping is interconnected, the smallest
room of course becomes the object. But when a
mechanical ventilation is installed interlocked with a gas
leakage detector in the smallest room where the density
limit is exceeded, the volume of the next smallest room
becomes the object.

NOTE 3 :

The minimum indoor floor area compared with the amount of
refrigerant is roughly as follows:
(When the ceiling is 8.9 ft (2.7 m) high)

Total amount of refrigerant (lbs (kg))

Min. volume of the indoor unit installed room (ft

3

(m3))

≤ Concentration limit (lbs/ft

3

(kg/m3))

e.g.,
charged amount
(22 lbs (10 kg))

Outdoor unit

e.g.,
charged amount
(33 lbs (15 kg))

Indoor unit

Room A Room B Room C Room D Room E Room F

Important

Outdoor unit

Refrigerant piping

Indoor unit

Refrigerant piping

Outdoor unit

Indoor unit

Mechanical ventilation device - Gas leak detector

Very
small
room

Small
room

Medium
room

Large room

0

6

12

22 44 66

18

24

30

36

42

48

d

2

Min. indoor floor area

Total amount of refrigerant lbs

Range below the
density limit of

0.019 lbs/ft

3

(0.3 kg/m3)
(countermeasures not
needed)

Range above the density
limit of

0.019 lbs/ft

3

(0.3 kg/m3)

(countermeasures needed)

+00EB99808701-1_01EN.book Page 16 Thursday, June 23, 2016 11:5 7 AM

EB99808701-1

Indoor unit setup check sheet

Confirmation of Indoor Unit Setup

Prior to delivery to the customer, check the address and setup of the indoor unit, which has been installed in this time and fill the check sheet (Table below).
Data of four units can be entered in this check sheet. Copy this sheet according to the No. of the indoor units. If the installed system is a group control
system, use this sheet by entering each line system into each installation manual attached to the other indoor units.

REQUIREMENT

This check sheet is required for maintenance after installat ion. Fill this sheet and then pass
this Installation Manual to the customers.

Indoor unit Indoor unit Indoor unit Indoor unit
Room name Room name Room name Room name
Model Model Model Model

Check indoor unit address. (For check method, refer to Applicable controls in this manual.)
* In case of a single system, it is unnecessary to enter the indoor address. (CODE No.: Line [12], Indoor [13], Group [14], Central control [03] )

Line Indoor Group Line Indoor Group Line Indoor Group Line Indoor Group

Central control address Central control address Central control address Central control address

Various setup Various setup Various setup Various setup

Have you changed lighting time of filter sign? If not, fill check mark [×] in [NO CHANGE], and fill check mark [×] in [ITEM] if changed, respectively.
(For check method, refer to Applicable controls in this manual.)

Filter sign lighting time

(CODE No. [01])

 NO CHANGE
 NONE [0000]
 150H [0001]
 2500H [0002]
 5000H [0003]
 10000H [0004]

Filter sign lighting time

(CODE No. [01])

 NO CHANGE
 NONE [0000]
 150H [0001]
 2500H [0002]
 5000H [0003]
 10000H [0004]

Filter sign lighting time

(CODE No. [01])

 NO CHANGE
 NONE [0000]
 150H [0001]
 2500H [0002]
 5000H [0003]
 10000H [0004]

Filter sign lighting time

(CODE No. [01])

 NO CHANGE
 NONE [0000]
 150H [0001]
 2500H [0002]
 5000H [0003]
 10000H [0004]

Have you changed detected temp. shift value? If not, fill check mark [×] in [NO CHANGE], and fill check mark [×] in [ITEM] if changed, respectively.
(For check method, refer to Applicable control in this manual.)

Detected temp. shift value setup

(CODE No. [06])

 NO CHANGE
 NO SHIFT [0000]
 +1°C 1.8°F [0001]
 +2°C 3.6°F [0002]
 +3°C 5.4°F [0003]
 +4°C 7.2°F [0004]
 +5°C 9.0°F [0005]
 +6°C 10.8°F [0006]

Detected temp. shift value setup

(CODE No. [06])

 NO CHANGE
 NO SHIFT [0000]
 +1°C 1.8°F [0001]
 +2°C 3.6°F [0002]
 +3°C 5.4°F [0003]
 +4°C 7.2°F [0004]
 +5°C 9.0°F [0005]
 +6°C 10.8°F [0006]

Detected temp. shift value setup

(CODE No. [06])

 NO CHANGE
 NO SHIFT [0000]
 +1°C 1.8°F [0001]
 +2°C 3.6°F [0002]
 +3°C 5.4°F [0003]
 +4°C 7.2°F [0004]
 +5°C 9.0°F [0005]
 +6°C 10.8°F [0006]

Detected temp. shift value setup

(CODE No. [06])

 NO CHANGE
 NO SHIFT [0000]
 +1°C 1.8°F [0001]
 +2°C 3.6°F [0002]
 +3°C 5.4°F [0003]
 +4°C 7.2°F [0004]
 +5°C 9.0°F [0005]
 +6°C 10.8°F [0006]

Incorporation of parts sold separately Incorporation of parts sold separately Incorporation of parts sold separately Incorporation of parts sold separately

Have you incorporated the following parts sold separately? If incorporated, fill check mark [×] in each [ITEM].
(When incorporating, the setup change is necessary in some cases. For setup change method, refer to Installation Manual attached to each part sold separately.)

 Others ( )
 Others ( )

 Others ( )
 Others ( )

 Others ( )
 Others ( )

 Others ( )
 Others ( )

+00EB99808701-1_01EN.book Page 35 Thursday, June 23, 2016 11:5 7 AM