Toshiba MMD-AP0481HF2UL User manual

AIR CONDITIONER (MULTI TYPE)
Indoor Unit
Model name:
Outside Air Unit
MMD-AP0481HF2UL
MMD-AP0721HF2UL
MMD-AP0961HF2UL
Installation Manual
Français
Installation Manual 1
English
Manuel du propriétaire 21
For commercial use
Pour usage commercial
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Contents
1 Precautions for safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
2 Accessory parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
3 System control of Outside Air Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
4 Selection of installation place. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
5 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
6 Duct work . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
7 Fan characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
8 Drain piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
9 Refrigerant piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
10 Electrical connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
11 Applicable controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
12 Test run . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
13 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
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.
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EN
1Precautions 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 indoor unit air filter. 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. 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 installation 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 operating the air conditioner.
If the air conditioner is operated with the valve open and without the refrigerant pipe, the compressor sucks air and
the refrigeration cycle is overpressurized, 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 becomes abnormally high
and it resultingly causes pipe burst and injuries on persons.
•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.
•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.
•Install the air conditioner at a height 8’ (2.4 m) or more from the floor.
If you insert your hands or others directly into the unit while the air conditioner operates, it is dangerous because you
may contact with revolving fan or active electricity.
•If refrigerant gas has leaked during the installation work, ventilate the room immediately.
If the leaked refrigerant gas comes in contact with fire, noxious 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 might
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 may cause fire.
•Use the specified wires for wiring connect the terminals. Securely fix them to prevent external forces applied
to the terminals from affecting the terminals.
•Conform to the regulations of the local electric company when wiring the power supply.
•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 working with the valve open, the compressor sucks air
and the refrigeration cycle is overpressurized, which may cause a burst or injury.
•Before carrying out the installation, maintenance, repair or removal work, set the circuit breaker to the OFF
position.
Otherwise, electric shocks may result.
•Do not touch the aluminium fin of the unit. You may injure yourself 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.
•The unit can be accessed from the service panel.
•Install a circuit breaker that meets the specifications in the installation manual 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 absorb 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 and 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.
• Accordingly the exclusive tools are required for the new refrigerant (R410A).
• For connecting pipes, use new and clean piping designed for R410A, and please care so that water or dust does not
enter.
•Tighten the flare nut with a torque wrench 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.
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2Accessory parts
NOTE
The wired remote control must be connected. Settings cannot be made for systems without remote controls.
Part name Q’ty Shape Usage
Owner’s Manual 1 — (Be sure to hand over to customers)
Installation Manual 1 This manual This manual for installer.
Heat insulator
1 For heat insulation of Gas pipe connecting section
1 For heat insulation of Liquid pipe connecting section
8
For heat insulation of hanging bracket
AP048 type: 4 pieces, 3.2" (80 mm)
AP072, 096 type: 4 pieces, 5.5" (140 mm)
3System control of Outside Air Unit
System able to be combined
The Outside Air Unit is connectable to SMMS (Super Modular Multi system).
However this is not connectable to SHRM (Super Heat Recovery Multi system).
Keep the height difference between the Outside Air Units to 1.97" (0.5 m) or less.
CORRECT
Height difference:
1.97" (0.5 m) or more
Connection which stretches over two floors is
unavailable units
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EN
4Selection 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 kinds of locations.
• Locations where inside the ceiling is used as route for outside air.
• 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 with 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.
• Places where iron or other metal dust is present. If iron or other metal dust adheres to or collects on the interior
of the air conditioner, it may spontaneously combust and start a fire.
• 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.)
• 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, high-
humidity outdoor air.
(Condensation may occur as a result.)
• Locations where special sprays are used frequently.
Installation space
Keep the space necessary for installation and service.
REQUIREMENT
The check port should be 23.6" × 23.6" (600 × 600 mm).
Unit: in (mm)
Installation under atmosphere of the high humidity
Although it has been confirmed that no trouble occurs on the unit, there is a fear of drip of the water if operation
under high humidity condition continues.
In some cases including the rainy season, especially inside of the ceiling may become high-humidity atmosphere
(dew-point temperature: 86 °F (30 °C) (humidity: 80%) or higher).
1Installation to inside of the ceiling with tiles on the roof.
2Installation to inside of the ceiling with slated roof.
3Installation to inside of the ceiling with kitchen.
• In the above cases, additionally attach the heat insulator (Glass wool, etc.) to all positions of the air
conditioner, which come to contact with the high-humidity atmosphere.
In this case, arrange the side plate (Service panel) so that it is easily removed.
• Apply also heat insulating a sufficient thickness 0.39" (10 mm) or more to the duct and connecting part of
the duct.
7.9" (200) or more
Electrical control box
Check port
Check port
39.4" (1000) or more
23.6"
(600)
7.9" (200)
23.6" (600)
2.0" (50)
or more
3.9" (100) or more
Service panel
Duct
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5Installation
WARNING
Install the air conditioner certainly to sufficiently withstand the weight.
If the strength is insufficient, the unit may fall down resulting in human injury.
Perform a specified installation work to guard against strong wind or earthquake.
An incomplete installation can cause accidents by the units falling and dropping.
REQUIREMENT
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. (Even units are packaged)
• Carry in the indoor unit as it is packaged if possible.
If carrying in the indoor unit unpacked by necessity, be sure to use buffering cloth, etc. to not damage the unit.
• To move the indoor unit, hold the hooking metals (4 positions) only.
Do not apply force to the other parts (refrigerant pipe, drain pan, foamed parts, or resin parts, etc.).
• Carry the package by two or more persons, and do not bundle it with PP band at positions other than specified.
• Use a forklift to transport materials. Do not drag or push the package because it is made of cardboard.
• If the vibration insulator is applied to the hanging bolt, make sure it does not cause larger vibration in the main unit
before using it.
External view
Installing the four 3/8" (M10)-diameter hanging bolts
• Space the hanging bolts according to the dimensions shown in the diagrams below.
• Use 3/8" (M10)-diameter hanging bolts (Required at the site).
Unit: in (mm)
Considering piping and wire connecting works in the ceiling after hanging down the indoor unit, select an
installation place and then determine the drawing-out direction of the pipes.
• If the ceiling has been already set, draw the refrigerant pipe, drain pipe, inter-unit wire between indoor and
outdoor units, central control system wire and remote control cord up to the positions where pipes and wires are
connected before hanging down the indoor unit.
ModelMMD-ABCD
AP048∗35.4" (898) 32.2" (818) Ø3/8" (9.5) flare Ø5/8" (15.9) flare
AP072∗
AP096∗55" (1398) 49.6" (1260) Ø1/2" (12.7) flare Ø7/8" (22.2) brazing
B
(Hanging bolt pitch)
4-M0.4" (10) hanging
bolt (Locally procured)
50.7" (1288) (Hanging bolt pitch)
Electrical
control
box
A
3.4" (87)
52.3" (1328)
Refrigerant pipe connecting port
(Liquid side) C
Drain pipe connecting port
Refrigerant pipe connecting port
(Gas side) D
19.5" (496)
2.6"
(66)
8.6"
(218) 5.9"
(150)
1.9"
(49)
49.8" (1266)
0.7" (18)
2.4" (60)
27.5" (699)
33.3"(845)
Treatment of ceiling
The ceiling differs according to structure of building.
For details, consult your constructor or interior finish contractor.
In the process after the ceiling board has been removed, it is important to reinforce ceiling foundation (frame) and
to keep horizontal level of installed ceiling correctly in order to prevent vibration of ceiling board.
Installation of hanging bolt
Use 3/8" (M10) hanging bolts (4 pcs, locally procured).
Matching to the existing structure, set pitch according to size in the unit external view as shown below.
Hanging up of unit
• Adjust the nut position (lower side).
• Hang up the main unit by hanging nut of hanging bolt to T groove of hanging bracket of the indoor unit.
• Using the level vial, etc., check that four sides are horizontal. (Horizontal degree: within 0.2" (5 mm))
• Attach canvas ducts (locally procured) to the air intake and the air discharge so that vibration of the main unit
does not travel to the duct or ceiling. Attach also acoustic-absorption material to the inner liner of the duct and
the vibration-proof rubber to the hanging bolt.
REQUIREMENT
• Using a level vial, etc., confirm the horizontal level of the indoor unit.
• Tighten the nut sufficiently, and fix it securely.
New concrete slab Steel flame structure Existing concrete slab
Install the bolts with insert brackets or anchor
bolts. Use existing angles or install new support angles. Use a hole-in anchors, hole-in plugs, or a hole-in bolts.
Reinforcing
steel
Anchor bolt
(Blade type
bracket) (Slide type
bracket) (Pipe hanging
anchor bolt)
Hanging bolt
Hanging bolt Support angle
Hanging bracket
Heat insulator
(Accessory)
* Note that the widths of the
AP048, AP072 and AP096
models are different.
Heat insulator
(Accessory) Hanging bracket
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EN
Installation of indoor unit
1Install temporarily the indoor unit.
Attach the hanging bracket to the hanging bolt.
Be sure to fix the hanging bracket from both up and down sides of the hanging bracket by using the nuts
(3/8" (M10) locally procured) and the washer.
2Using nut, adjust height of the main unit.
3Check the main unit is horizontally installed.
Attach canvas ducts (locally procured) to the air intake and the air discharge so that vibration of the main unit
does not travel to the duct or ceiling.
Attach also acoustic-absorption material to the inner liner of the duct and the vibration-proof rubber to the
hanging bolt.
REQUIREMENT
Make sure that the unit is hanging level.
If it is hung horizontally, the drain pan may overflow. Install the unit within the dimensions indicated below.
Using a level vial or vinyl hose, check whether the indoor unit is hung horizontally or not.
Front view Side view
Hanging bolt
Nut (Upper side)
Washer (Upper side)
Heat insulator
(Hanging bracket main unit)
Washer (Lower side)
Nuts (Lower side)
Main unit
Level vial
Install the main unit within 0.2" (5 mm) while lowering the
drain pipe connecting port side slightly.
0.2" (5 mm)
or less
Water pouring
Level vial
Vinyl hose
± 0.2" (5 mm)
Install both air intake and air supply port sides
within ± 0.2" (5 mm).
6Duct work
CAUTION
Be sure to apply heat insulation to the duct to prevent dewy condition.
If there is an incomplete duct work, the water leakage into the room may happen.
REQUIREMENT
• In order to prevent short circuits, design the duct work so that the intake and discharge openings are not adjacent to
each other.
• Install the filter chamber on the intake side of the indoor unit. Attach the long life prefilter and high-efficiency filter to
the filter chamber to remove dust. Send outside air to the inside of the indoor unit and the area being air conditioned.
• If no air filter is installed, dust will collect in the heat exchanger, which may cause the air conditioner to fail or to leak.
• Be sure to set the duct at air intake side with descending inclination because the suction duct of the this unit is
exposed to outdoors and therefore rainwater, leaves and birds are easy to enter in if it is set horizontally.
Attaching wire netting and others to end of the suction duct is also recommended.
• Connect the duct so that the air intake sucks outside air only.
Be sure to apply heat insulation for the duct to prevent dewing.
(Recommended material: Glass wool or foam polyethylene, Thickness: 1.0" (25 mm))
• When welding the duct at the site, sparks may enter in the air filter or heat insulator.
To avoid spread of the fire, cover the duct with iron plate, etc.
• When penetrating metal lath, wire lath or metal plank with the metal duct, isolate the duct from the wall electrically.
• Set the canvas ducts at air intake port and air supply port. It is to avoid conveyance of vibration, abnormal resonance
sound and also to make easy the disassembly of the main unit in service time.
• Connect the ducts so that the ducts do not weight on the main unit.
If connecting the ducts directly to the main unit, the duct vibration abnormal sound from the main unit may happen,
and also the filter and service panel cannot be detached.
• Be sure to fix the ducts by using the hanging bolts.
Duct work
After installing the product, perform the duct work according to the working diagram.
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Connecting flange
Refer to size in the figure attached to the main unit.
REQUIREMENT
If the air conditioner unit and the canvas joint are connected with the rivets, the fan and the refrigerating cycle cannot
be checked.
Be sure to use the flange as shown in the above and tighten it by the bolts.
(Fixing bolts 0.2" x 0.5" (6 x 12 mm), locally procured)
<MMD-AP048 type>
<Air supply port connecting flange>
<MMD-AP072 type, AP096 type>
<Air supply port connecting flange>
<Air intake port connecting flange> <Air intake port connecting flange>
42.6" (1083)
25.6" (650) (2.6" × 10 (65 × 16))
2.6" (65)
1.8"
(45)
0.7" (19)
0.4" (9)
2.6" (65)
13.7" (347)
0.4" (9)
12.8" (325) (2.6" × 5 (65 × 5))
0.4" (9)
0.7" (19)
42.6" (1083)
40.9" (1040) (2.6" × 16 (65 × 16))
2.6" (65)
1.8"
(45)
0.7" (19)
0.4" (9)
2.6" (65)
13.7" (347)
0.4" (9)
12.8" (325) (2.6" × 5 (65 × 5))
0.4" (9)
0.7" (19)
23.0" (583)
20.5" (520) (2.6" × 8 (65 × 8))
2.6" (65)
2.2"
(55)
0.7" (19)
0.4" (9)
2.6" (65)
15.1" (383)
1.1" (28)
12.8" (325) (2.6" × 5 (65 × 5))
0.4" (9)
0.7" (19)
42.6" (1083)
40.9" (1040) (2.6" × 16 (65 × 16))
2.6" (65)
1.8"
(45)
0.7" (19)
0.4" (9)
2.6" (65)
15.1" (383)
1.1" (28)
12.8" (325) (2.6" × 5 (65 × 5))
0.4" (9)
0.7" (19)
<Example of construction>
1Air intake duct
• Connect the air intake duct (Locally procured) to the inlet flange.
Wrap aluminum tape around connecting part between the air intake port flange and duct, or provide sealer
so that air does not leak.
• For the outside air intake port, attach a hood so that outside air is sucked from lower side.
And attach wire netting, etc. to the air intake of the hood.
• Set the air intake duct at descending inclination so that water can be drained even if rainwater enters in.
• Wrap the outside of the intake duct with heat insulator because it intakes cold air while heating.
2Air supply duct
Connect the air supply duct (Locally procured) to the Air supply flange.
Wrap aluminum tape around connecting part of the air supply port flange and duct or apply packing so that air
does not leak.
Wall
*1: Locally procured
Check port
(23.6" × 23.6" in
(600 × 600 mm))
*1
Heat insulator *1 Canvas duct *1 Product main unit
Air supply duct *1 Air supply flange
*1 Air intake flange
*1
Filter chamber *1 Canvas duct *1 Hood
(with wire netting)
*1
Air intake duct
*1
Descending
inclination
High-efficiency filter *1
Long life prefilter *1
Heat insulator *1
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EN
7Fan characteristics
Fan characteristics
<MMD-AP048 type>
(Standard air volume: 636 cfm, Lower limit air volume: 445 cfm, Upper limit air volume: 700 cfm)
REQUIREMENT
Set a volume damper to the air supply duct, and then adjust the air volume so that it is kept in the range of 70 to
110% against the standard air volume.
1-2. 230V Fan characteristics 2-2. 208V Fan characteristics
1-3. 230V cfm-A 2-3. 208V cfm-A
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
400 500 600 700
External static pressure (in WG)
Air flow rate (cfm)
Min 445 (cfm) Standard 636 (cfm) Max 700 (cfm)
Middle static
pressure tap
Low static pressure tap
High static pressure tap
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
400 500 600 700
External static pressure (in WG)
Air flow rate (cfm)
Min 445 (cfm) Standard 636 (cfm) Max 700 (cfm)
Low static
pressure tap
High static pressure tap
Middle static pressure tap
1
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
2
400 500 600 700
Fan motor current (A)
Middle static
pressure tap
High static pressure tap
Low static
pressure tap
Air flow rate (cfm)
1
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
2
400 500 600 700
Fan motor current (A)
Middle static
pressure tap
High static pressure tap
Low static
pressure tap
Air flow rate (cfm)
<MMD-AP072 type>
(Standard air volume: 989 cfm, Lower limit air volume: 693 cfm, Upper limit air volume: 1088 cfm)
REQUIREMENT
Set a volume damper to the air supply duct, and then adjust the air volume so that it is kept in the range of 70 to
110% against the standard air volume.
1-2. 230V Fan characteristics 2-2. 208V Fan characteristics
1-3. 230V cfm-A 1-3. 208V cfm-A
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
600 900 1200
External static pressure (in. WG)
Air flow rate (cfm)
Min 693 (cfm) Standard 989 (cfm) Max 1088 (cfm)
Middle static pressure tap
High static pressure tap
Low static
pressure tap
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
600 900 1200
External static pressure (in. WG)
Air flow rate (cfm)
Min 693 (cfm) Standard 989 (cfm) Max 1088 (cfm)
Middle static pressure tap
High static pressure tap
Low static
pressure tap
2
2.2
2.4
2.6
2.8
3
3.2
3.4
3.6
3.8
4
600 900 1200
Fan motor current (A)
Air flow rate (cfm)
Middle static
pressure tap
High static pressure tap
Low static
pressure tap
2
2.2
2.4
2.6
2.8
3
3.2
3.4
3.6
3.8
4
600 900 1200
Fan motor current (A)
Air flow rate (cfm)
Middle static
pressure tap
High static pressure tap
Low static
pressure tap
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<MMD-AP096 type>
(Standard air volume: 1237 cfm, Lower limit air volume: 866 cfm, Upper limit air volume: 1360 cfm)
REQUIREMENT
Set a volume damper to the air supply duct, and then adjust the air volume so that it is kept in the range of 70 to
110% against the standard air volume.
1-2. 230V Fan characteristics 2-2. 208V Fan characteristics
1-3. 230V cfm-A 2-3. 208V cfm-A
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
800 1100 1400
External static pressure (in. WG)
Air flow rate (cfm)
Min 866 (cfm) Standard 1237 (cfm) Max 1360 (cfm)
High static pressure tap
Low static pressure tap
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
800 1100 1400
External static pressure (in. WG)
Air flow rate (cfm)
Min 866 (cfm) Standard 1237 (cfm) Max 1360 (cfm)
High static pressure tap
Low static pressure tap
2
2.2
2.4
2.6
2.8
3
3.2
3.4
3.6
3.8
4
800 1100 1400
Fan motor current (A)
Air flow rate (cfm)
High static pressure tap
Low static pressure tap
2
2.2
2.4
2.6
2.8
3
3.2
3.4
3.6
3.8
4
800 1100 1400
Fan motor current (A)
Air flow rate (cfm)
High static pressure tap
Low static pressure tap
Wire connection change of fan motor
The motor wires for the fan have been connected to at shipment from the factory.
Change the wire connection if change of the external static pressure is required due to the duct resistance.
REQUIREMENT
When the external static pressure was changed, enter the changed static pressure value in the identification plate of
the unit.
<MMD-AP048, AP072 type>
<MMD-AP096 type>
Terminal block No. Fan motor wiring Remarks
F1 (Low static pressure tap) Blue —
F2 (Middle static pressure tap) Orange At shipment from factory
F3 (High static pressure tap) Black —
Terminal block No. Fan motor wiring Remarks
F1 (-) Blue Not used.
F2 (Low static pressure tap) Orange At shipment from factory
F3 (High static pressure tap) Black —
F 2
F1 F2 F3 F4
<MMD-AP048 type>
Black
Blue Orange
Electrical control box
Fan motor
2P terminal block
4P terminal block
Control
P.C.
board
FM
Lead wire for changing the external static pressure
When changing the external static pressure is
necessary, change connection of this lead wire.
Orange (at shipment of factory)
F1 F2 F3 F4 F1 F2 F3 F4
<MMD-AP072 type, AP096 type>
Black
Blue Orange
Electrical control box
Fan motor
4P terminal block
2P terminal block
Control
P.C.
board
FM
Lead wire for changing the external static pressure
When changing the external static pressure is
necessary, change connection of this lead wire.
Orange (at shipment of factory)
Orange (at shipment of factory)
Black
Blue Orange
Fan motor
FM
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EN
8Drain piping
CAUTION
Following the Installation Manual, perform the drain piping work that water is properlydrained, and apply a heat
insulation not to cause a dew condensation.
Inappropriate piping work may cause the water leakage in the room and wet of furniture.
REQUIREMENT
• The drain piping flows the natural drainage. Make sure to set the drain piping from the unit with descending slope of 1/50 to
1/100 and do not make up-down or trap in the midway.
• Set the horizontal pulling of the drain pipe to 65.7' (20 m) or less. When drain piping is too long, attach the support bracket
at intervals of 4'11" to 6'7" (1.5 m to 2 m) to avoid the pipe becomes undulant as shown in figure below.
• Be sure to connect the drain pipe to the air conditioner with adhesive to avoid water leakage from the joint portion.
• Condensation may occur on the drain pipes including collective pipes. All drain pipes must be wrapped with heat insulator
to prevent dew condensation. Especially a part where drain pipe is connected to the indoor unit must be firmly insulated with
the provided heat insulator.
Pipe material, size and insulator
The following materials for piping work and insulating process are locally procured.
Connecting drain pipe
REQUIREMENT
• Using adhesive agent for vinyl chloride, connect the hard vinyl chloride pipes certainly so that water does not leak.
• It takes some time to dry and indurate the adhesive agent. (Refer to the manual of adhesive agent.) Do not apply any extra
force on the connecting section until the adhesive agent dried.
Pipe material Hard vinyl chloride pipe socket for VP25
Hard vinyl chloride pipe VP25 (Nominal outer diameter Ø1.3" (32 mm))
Insulator Foamed polyethylene foam, thickness: 0.4" (10 mm) or more
<Example for installation of the main piping (Incl. piping support)>
4'11" to 6'7" (1.5 m to 2 m) As long as possible
Up-down bend
Trap
VP-30
Descending slop of
1/50 to 1/100
Descending slop of
1/50 to 1/100 INCORRECT
Check the draining
Check the water drainage is surely performed at the test run. Check also no water leakage is found at the pipe
connecting part.
REQUIREMENT
• Be sure to check draining even if installing the unit in heating season.
• Using a kettle or hose, pour water gradually from the drain pan at the air supply port.
Service panel
Pour water into the drain pan using hose, etc.
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9Refrigerant piping
CAUTION
When the refrigerant pipe is long, provide support
brackets at intervals of 8'2" to 9'10" (2.5 m 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.
Use general copper pipes with a wall thickness of 0.03"
(0.8 mm) for Ø1/2" (12.7 mm), and with a wall thickness
of 0.04" (1.0 mm) for Ø7/8" (22.2 mm) (half hard).
Do not use any copper pipes with a wall thickness less
than these thicknesses.
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
• The pipe (Ø7/8" (22.2 mm)) at gas side is connected
with brazing.
Liquid side refrigerant pipe
connection
Flaring
1Cut the pipe with a pipe cutter.
Remove burrs completely. (Remaining burrs may
cause gas leakage.)
2Insert 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
no “whooshing” sound: This is normal and is not
indicative of trouble.
• Use two wrenches to connect the indoor unit pipe.
• Use the tightening torque levels as listed in the table
below.
Model MMD- AP048 AP072, AP096
Pipe size
(Unit: in (mm))
Gas side Ø5/8"
(15.9 mm) Ø7/8" (22.2 mm)
Liquid side Ø3/8"
(9.5 mm) Ø1/2"
(12.7 mm)
Outer dia. of
copper pipe R410A tool used Conventional tool used
3/8" (9.5) 0 - 0.02"
(0 - 0.5) 0.04" - 0.06" (1.0 - 1.5)
1/2" (12.7), 5/8" (15.9)
Outer dia. of
copper pipe A+0
–0.4
3/8" (9.5) 0.52" (13.2)
1/2" (12.7) 0.65" (16.6)
5/8" (15.9) 0.78" (19.7)
Outer dia. of connecting
pipe (mm) Tightening torque (Unit: ft•lbs (N•m))
3/8" (9.5) 24 -31 (33 - 42)
1/2" (12.7) 37- 46 (50 - 62)
5/8" (15.9) 46 -57 (63 -77)
Work using double spanner
• 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.
Gas side refrigerant pipe
connection
* The brazing connections on the gas side are
AP072 and AP096 models.
• Turn up the pipe heat insulator to the unit side.
• Wrap the pipe with wet cloth.
• Remove the cup on the gas side piping by using a
brazing machine.
CAUTION
Do not burn the pipe heat insulator.
• Braze the connection piping to the joint part.
• Turn back the pipe heat insulator and tie up with a
banding band.
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
• Apply the heat insulation to the pipe connecting
section of the indoor unit securely up to the root
without exposure of the pipe. (The pipe exposed to the
outside causes water leak.)
• Wrap heat insulator with its slits facing up (ceiling
side).
Turn up pipe heat
insulator
Remove the all
brazed part.
Wet cloth
Remove the cap.
Connection pipe locally
procured Ø7/8" (22.2 mm)
Braze all around
Tie up with a banding band.
Indoor unit
Union
Heat insulation pipe
(Accessory) Banding band
(Locally procured)
Heat insulator of
the pipe
Flare nut
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EN
10Electrical 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.
• Install circuit breaker is not tripped by shock waves.
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 completes.
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 to the right
table. If capacity is little, it is dangerous because
overheat or seizure may be caused.
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
Power supply wire
Select wire size based on the MCA.
▼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.
CAUTION
The remote control wire (Communication line) and AC208 / 230 V wires cannot be parallel to contact each other and
cannot be stored in the same conduits. If doing so, a trouble may be caused on the control system due to noise or other
factor.
Model Power Supply Voltage Range (V) MCA MOCP
Min Max (A) (A)
MMD-AP0481HF2UL
208 / 230 V-1-60 Hz 187 253
2.30 15
MMD-AP0721HF2UL 4.29 15
MMD-AP0961HF2UL 4.76 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
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Wiring between indoor and outdoor units
CAUTION
The Outside Air Unit and indoor unit for air conditioning cannot be controlled as a group.
NOTE
An outdoor unit connected with control wiring between indoor and outdoor units wire becomes automatically the
header unit.
▼Wiring example
U1U2
U1U2U3U4L1 L2 L3 NU5U6
L1L2 ABU1U2L1L2 A B U1U2L1L2 A B U1U2L1L2 A B
A B
U1U2U3U4L1 L2 L3 NU5U6
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
Outside Air Unit Other indoor unit Other indoor unit Other 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
Wire connection
REQUIREMENT
• Connect the wires matching the terminal numbers. Incorrect connection causes a trouble.
• Pass the wires through the bushing of wire connection holes of the indoor unit.
• Keep a margin (Approx. 100 mm) on a wire to hang down the electrical control box at servicing or other purpose.
• The low-voltage circuit is provided for the remote control. (Do not connect the high-voltage circuit)
• Remove the cover of the electrical control box by taking off the mounting screws (2 positions).
• Tighten the screws of the terminal block, and fix the wires with cord clamp attached to the electrical control box.
(Do not apply tension to the connecting section of the terminal block.)
• Set a loop for the connecting wire of the storing part of the indoor unit electrical control; otherwise the electrical
control box cannot be drawn out in service time.
• Mount the cover of the electrical control box without pinching wires.
Power supply wires and ground wire
1. Strip the wire ends.
Power supply wire: 0.4"(10 mm)
Ground wire: 0.8"(20 mm)
2. Match the wire colors with the terminal numbers on the indoor units’ and circuit breakers’ terminal blocks and
firmly screw the wires to the corresponding terminals.
3. Secure the ground wire with the ground screw.
4. Fix the wires with a cord clamp.
Unit: in (mm)
L1 L2
U1 U2 A B
U1 U2 A B
L1 L2
Indoor / Outdoor
control wiring
(U1, U2terminals)
Remote control wiring
(A, B terminals)
<MMD-AP048 type> <MMD-AP072 type, AP096 type>
Power supply wire
Power Supply wire
Indoor / Outdoor
control wiring
(U1, U2terminals)
Remote control wiring
(A, B terminals)
Conduit pipe
Ground screw
L1L2
0.8" (20) 1.2" (30)
0.4" (10)
Ground wire
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EN
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. 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.
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)
11Applicable controls
REQUIREMENT
When the air conditioner is used for the first time, it will
take some moments after the power has been turned on
before the remote control becomes available for
operations: This is normal and is not indicative of trouble.
• 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. Setup
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 was 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 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 making
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 trouble with the
product may result.
1Push 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.)
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2Each 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.
3Specify CODE No. [ ] with “TEMP.” /
buttons.
4Select SET DATA [ ] with “TIME” /
buttons.
5Push 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.
6When 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.
Setting the level of dirtiness
for the filter
The time when the filter indicator lights can be changed
to half depending on the level of dirtiness.
Follow to the basic operation procedure
(1→2→3→4→5→6). Perform the operation.
• Specify [02] for the CODE No. in Procedure 3.
• The SET DATA in Procedure 4is [0001].
Group control
In a group control, a remote control can control up to
maximum 8 units.
The Outside Air Unit and indoor unit for air conditioning
cannot be controlled as a group.
• 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 Filter sign term
0000 None
0001 150 H
0002 2500 H
(Factory default)
0003 5000 H
0004 10000 H
SET DATA 0000 0001
Filter sign term Normal Half
12Test 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 MΩor more exists between the terminal block L to N
and the grounding.
If resistance of less than 1 MΩis detected, do not run the unit.
2) Check the valve of the outdoor unit being opened fully.
• To protect 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 because 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 Owner’s Manual to the outdoor unit.
A forced test run can be executed in the following procedure even if the operation stops by 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.
1Push button for 4 seconds or more. [TEST] is displayed on the display part and the selection
of mode in the test mode is permitted.
2Push button.
2, 4
3
1,5
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EN
3Select 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 trouble is performed as usual.
4After the test run, push button to stop a test run.
(Display part is same as procedure 1.)
5Push button to cancel (release from) the test run mode.
([TEST] disappears on the display and the status returns to a normal.)
◆Requirements for turning thermostat OFF
Cooling operation
• When the outside air temperature is lower than or equal to 66.2 °F (19 °C).
• When the outside air temperature is lower than or equal to 37 °F (3 °C) above the set temperature.
Heating operation
• When the outside air temperature is lower than or equal to 23 °F (-5 °C).
• When the outside air temperature is higher than or equal to 59 °F (15 °C).
• When the outside air temperature is higher than or equal to 37 °F (3 °C) above the set temperature.
13Troubleshooting
Confirmation and check
When a problem occurred in the air conditioner, check code and indoor UNIT No. appear on the display part of the
remote control.
The check code is only displayed during the operation.
If the display disappears, operate the air conditioner according to the following “Confirmation of check code log” for
confirmation.
Confirmation of check code log
When a problem occurred on the air conditioner, the check code log can be confirmed with the following procedure.
(The check code log is stored in memory up to 4 check code.)
The log can be confirmed from both operating status and stop status.
1When and buttons are pushed simultaneously for 4 seconds or more, the following display
appears.
If is displayed, the mode enters in the check code log mode.
•[01: Order of check code log] is displayed in CODE No.
• [Check code] is displayed in CHECK.
• [Indoor unit address in which a problem occurred] is displayed in Unit No.
2Every pushing of button used to set temperature, the check code 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 check code log of the indoor unit will be deleted.
3After confirmation, push button to return to the usual display.
Check code Indoor UNIT No. in which
a problem occurred
3
2
1
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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 trouble 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, : Flashing, : 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 trouble between indoor and remote control
(Detected at remote control side)
Remote
control
E02 — — Remote control transmission trouble Remote
control
E03 — — Communication trouble between indoor and remote control (Detected at indoor
side) Indoor
E04 — — Communication circuit trouble 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 trouble 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 trouble between indoor
MCU Indoor
E12 E12 01: Indoor / Outdoor communication
02: Communication between outdoor units Automatic address start trouble 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. (SMMS-i only)
I/F
E18 — —
Communication trouble between indoor units Indoor
E19 E19 00: Header is nothing
02: Two or more header units Outdoor header units quantity trouble 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 trouble 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 trouble I/F
E31 E31 IPDU communication trouble I/F
F01 — — ALT Indoor TCJ sensor trouble Indoor
F02 — — ALT Indoor TC2 sensor trouble Indoor
F03 — — ALT Indoor TC1 sensor trouble Indoor
F04 F04 — ALT TD1 sensor trouble I/F
F05 F05 — ALT TD2 sensor trouble I/F
F06 F06 TE1 sensor
TE2 sensor ALT TE1 sensor trouble TE2 sensor trouble I/F
F07 F07 — ALT TL sensor trouble I/F
F08 F08 — ALT TO sensor trouble I/F
F09 F09 01: TG1
02: TG2 TG1 sensor trouble TG2 sensor trouble I/F
F10 — — ALT Indoor TA sensor trouble Indoor
F11 — TF sensor ALT TF sensor trouble Indoor
F12 F12 01: TS1 sensor
03: TS3 sensor ALT TS1 sensor trouble, TS3 sensor trouble I/F
F13 F13 01: Comp. 1 side 02: Comp. 2 side
03: Comp. 3 side ALT TH sensor trouble 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 trouble I/F
F23 F23 — ALT Ps sensor trouble I/F
F24 F24 — ALT Pd sensor trouble I/F
F29 — — SIM Indoor other trouble Indoor
F31 F31 — SIM Indoor EEPROM trouble 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 trouble IPDU
H05 H05 — TD1 miswiring I/F
H06 H06 — Low pressure protective operation I/F
H07 H07 — Oil level down detective protection 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
Sub-
code
A3-IPDU
Fan-
IPDU
Sub-
code
A3-IPDU
Fan-
IPDU
12312 12312
01 0D 
02 0E 
03  0F 
04 11 
05  12 
06  13  
07  18 
08 19 
09 1A 
0A  1B  
0B  
Circle (  ): IPDU trouble
0C 
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EN
H08 H08
01: TK1 sensor trouble
02: TK2 sensor trouble
03: TK3 sensor trouble
04: TK4 sensor trouble
05: TK5 sensor trouble
Oil level detective temp sensor trouble I/F
H15 H15 — TD2 miswiring I/F
H16 H16
01: TK1 oil circuit system trouble
02: TK2 oil circuit system trouble
03: TK3 oil circuit system trouble
04: TK4 oil circuit system trouble
05: TK5 oil circuit system trouble
Oil level detective circuit trouble 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 trouble I/F
L20 — — SIM Duplicated central control addresses Indoor
L28 L28 — SIM Over No. of connected outdoor units I/F
L29 L29 The same as E31 SIM No. of IPDU trouble I/F
L30 L30 Detected indoor address SIM Indoor outside interlock Indoor
— L31 — — Extended I/C trouble I/F
P01 — — ALT Indoor fan motor trouble Indoor
P03 P03 — ALT Discharge temp. TD1 trouble 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 trouble / interruption of
power supply
I/F
01: Comp. 1 side
02: Comp. 2 side
03: Comp. 3 side Inverter DC voltage (Vdc) trouble
P07 P07 01: Comp. 1 side 02: Comp. 2 side
03: Comp. 3 side ALT Heat sink overheat trouble IPDU, I/F
P10 P10 Detected indoor address ALT Indoor overflow trouble Indoor
P12 — — ALT
Indoor fan motor trouble or duct setting miss Indoor
P13 P13 — ALT Outdoor liquid back detection trouble I/F
P15 P15 01: TS condition
02: TD condition ALT Gas leak detection I/F
P17 P17 — ALT Discharge temp. TD2 trouble I/F
P18 P18 — ALT Discharge temp. TD3 trouble I/F
P19 P19 Detected outdoor unit number ALT 4-way valve inverse trouble I/F
P20 P20 — ALT High-pressure protective operation I/F
P22 P22
0 :IGBT circuit
1 :Location detection circuit trouble
3 :Motor lock-up trouble
4 :Motor current was detected.
C :Abnormal temperature was detected by the TH
sensor.
D :TH sensor trouble
E : Inverter DC voltage trouble (outdoor unit fan)
Caution)
Although letters 0 to F appear at locations indicated
by “ ”, please ignore them.
ALT Outdoor fan IPDU trouble IPDU
P26 P26 01: Comp. 1 side 02: Comp. 2 side
03: Comp. 3 side ALT G-TR short protection trouble IPDU
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
Trouble detected by TCC-LINK central control device
TCC-LINK : TOSHIBA Carrier Communication Link.
P29 P29 01: Comp. 1 side 02: Comp. 2 side
03: Comp. 3 side ALT Comp position detective circuit system
trouble IPDU
P31 P31 — ALT Other indoor unit trouble
(Group follower unit trouble) 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 trouble in TCC-LINK central
control device TCC-LINK
C06 — — — Receiving trouble 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 trouble contents of unit with occurrence of alarm Group control branching unit trouble 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
35-EN 36-EN
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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/ft3(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 (ft3(m3))
≤Concentration limit (lbs/ft3 (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
d2
Min. indoor floor area
Total amount of refrigerant lbs
Range below the
density limit of
0.019 lbs/ft3(0.3 kg/m3)
(countermeasures not
needed)
Range above the density
limit of
0.019 lbs/ft3(0.3 kg/m3)
(countermeasures needed)
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