Mitsubishi Electronics PURY-P72, PURY-P144, P168, P120YTHMU-A, P240YTSHMU-A User Manual

Safety Precautions

Before installing the unit, thoroughly read the following safety precautions.
Observe these safety precautions for your safety.

WARNING

This symbol is intended to alert the user to the presence of important instructions that must be followed to avoid

the risk of serious injury or death.

CAUTION

This symbol is intended to alert the user to the presence of important instructions that must be followed to avoid

the risk of serious injury or damage to the unit.

After reading this manual, give it to the user to retain for future reference.
Keep this manual for easy reference. When the unit is moved or repaired, give this manual to those who provide these

services.
When the user changes, make sure that the new user receives this manual.

WARNING

Ask your dealer or a qualified technician to install the
unit.

Improper installation by the user may result in water leak­age, electric shock, smoke, and/or fire.

Properly install the unit on a surface that can with­stand the weight of the unit.

Unit installed on an unstable surface may fall and cause in­jury.

Only use specified cables. Securely connect each ca­ble so that the terminals do not carry the weight of the
cable.

Improperly connected or fixed cables may produce heat
and start a fire.

Take appropriate safety measures against strong
winds and earthquakes to prevent the unit from falling.

If the unit is not installed properly, the unit may fall and
cause serious injury to the person or damage to the unit.

Do not make any modifications or alterations to the
unit. Consult your dealer for repair.

Improper repair may result in water leakage, electric shock,
smoke, and/or fire.

In the event of a refrigerant leak, thoroughly ventilate
the room.

If refrigerant gas leaks and comes in contact with an open
flame, poisonous gases will be produced.

When installing the All-Fresh type units, take it into
consideration that the outside air may be discharged
directly into the room when the thermo is turned off.

Direct exposure to outdoor air may have an adverse effect
on health. It may also result in food spoilage.

Properly install the unit according to the instructions
in the installation manual.

Improper installation may result in water leakage, electric
shock, smoke, and/or fire.

Have all electrical work performed by an authorized
electrician according to the local regulations and in­structions in this manual, and a dedicated circuit must
be used.

Insufficient capacity of the power supply circuit or improper
installation may result in malfunctions of the unit, electric
shock, smoke, and/or fire.

Do not touch the heat exchanger fins.

The fins are sharp and dangerous.

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WARNING

Securely attach the terminal block cover (panel) to the
unit.

If the terminal block cover (panel) is not installed properly,
dust and/or water may infiltrate and pose a risk of electric
shock, smoke, and/or fire.

Only use the type of refrigerant that is indicated on the
unit when installing or reinstalling the unit.

Infiltration of any other type of refrigerant or air into the unit
may adversely affect the refrigerant cycle and may cause
the pipes to burst or explode.

When installing the unit in a small room, exercise cau­tion and take measures against leaked refrigerant
reaching the limiting concentration.

Consult your dealer with any questions regarding limiting
concentrations and for precautionary measures before in­stalling the unit. Leaked refrigerant gas exceeding the lim­iting concentration causes oxygen deficiency.

Consult your dealer or a specialist when moving or re­installing the unit.

Improper installation may result in water leakage, electric
shock, and/or fire.

After completing the service work, check for a gas
leak.

If leaked refrigerant is exposed to a heat source, such as a
fan heater, stove, or electric grill, poisonous gases may be
produced.

Do not try to defeat the safety features of the unit.

Forced operation of the pressure switch or the temperature
switch by defeating the safety features of these devices, or
the use of accessories other than the ones that are recom­mended by MITSUBISHI may result in smoke, fire, and/or
explosion.

Only use accessories recommended by MITSUBISHI.

Ask a qualified technician to install the unit. Improper instal­lation by the user may result in water leakage, electric
shock, smoke, and/or fire.

Control box houses high-voltage parts.

When opening or closing the front panel of the control box,
do not let it come into contact with any of the internal com­ponents. Before inspecting the inside of the control box,
turn off the power, keep the unit off for at least 10 minutes,
and confirm that the voltage between FT-P and FT-N on
INV Board has dropped to DC20V or less. (It takes about
10 minutes to discharge electricity after the power supply is
turned off.)

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Precautions for handling units for use with R410A

CAUTION

Do not use the existing refrigerant piping.

A large amount of chlorine that is contained in the residual

refrigerant and refrigerator oil in the existing piping may
cause the refrigerator oil in the new unit to deteriorate.

R410A is a high-pressure refrigerant and can cause the

existing pipes to burst.

Use refrigerant pipes made of phosphorus deoxidized
copper. Keep the inner and outer surfaces of the pipes
clean and free of such contaminants as sulfur, oxides,
dust, dirt, shaving particles, oil, and water.

These types of contaminants inside the refrigerant pipes
may cause the refrigerant oil to deteriorate.

Store the pipes to be installed indoors, and keep both
ends of the pipes sealed until immediately before braz­ing. (Keep elbows and other joints wrapped in plastic.)

Infiltration of dust, dirt, or water into the refrigerant system
may cause the refrigerating machine oil to deteriorate or
cause the unit to malfunction.

Use a small amount of ester oil, ether oil, or alkylben­zene to coat flares and flanges.

Infiltration of a large amount of mineral oil may cause the re­frigerating machine oil to deteriorate.

Charge liquid refrigerant (as opposed to gaseous re­frigerant) into the system.

If gaseous refrigerant is charged into the system, the com­position of the refrigerant in the cylinder will change and
may result in performance loss.

Use a vacuum pump with a reverse-flow check valve.

If a vacuum pump that is not equipped with a reverse-flow
check valve is used, the vacuum pump oil may flow into the
refrigerant cycle and cause the refrigerating machine oil to
deteriorate.

Prepare tools for exclusive use with R410A. Do not use
the following tools if they have been used with the con­ventional refrigerant (gauge manifold, charging hose,
gas leak detector, reverse-flow check valve, refrigerant
charge base, vacuum gauge, and refrigerant recovery
equipment.).

If the refrigerant or the refrigerating machine oil left on

these tools are mixed in with R410A, it may cause the re­frigerating machine oil to deteriorate.

Infiltration of water may cause the refrigerating machine

oil to deteriorate.

Gas leak detectors for conventional refrigerants will not

detect an R410A leak because R410A is free of chlorine.

Do not use a charging cylinder.

If a charging cylinder is used, the composition of the refrig­erant will change, and the unit may experience power loss.

Exercise special care when handling the tools for use
with R410A.

Infiltration of dust, dirt, or water into the refrigerant system
may cause the refrigerating machine oil to deteriorate.

Only use refrigerant R410A.

The use of other types of refrigerant that contain chlorine
(i.e. R22) may cause the refrigerating machine oil to deteri­orate.

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Before installing the unit

WARNING

Do not install the unit where a gas leak may occur.

If gaseous refrigerant leaks and piles up around the unit, it
may be ignited.

Do not use the unit to keep food items, animals, plants,
artifacts, or for other special purposes.

The unit is not designed to preserve food products.

Do not use the unit in an unusual environment.

Do not install the unit where a large amount of oil or steam

is present or where acidic or alkaline solutions or chemical
sprays are used frequently. Doing so may lead to a re­markable drop in performance, electric shock, malfunc­tions, smoke, and/or fire.

The presence of organic solvents or corrosive gas (i.e.

ammonia, sulfur compounds, and acid) may cause gas
leakage or water leakage.

When installing the unit in a hospital, take appropriate
measures to reduce noise interference.

High-frequency medical equipment may interfere with the
normal operation of the air conditioner or vice versa.

Do not install the unit on or over things that cannot get
wet.

When the humidity level exceeds 80% or if the drainage
system is clogged, the indoor unit may drip water. Drain wa­ter is also discharged from the outdoor unit. Install a central­ized drainage system if necessary.

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Before installing the unit (moving and reinstalling the unit) and performing
electrical work

CAUTION

Properly ground the unit.

Do not connect the grounding wire to a gas pipe, water pipe,
lightning rod, or grounding wire from a telephone pole. Im­proper grounding may result in electric shock, smoke, fire,
and/or malfunction due to noise interference.

Do not put tension on the power supply wires.

If tension is put on the wires, they may break and result in
excessive heat, smoke, and/or fire.

Install an earth leakage breaker to avoid the risk of
electric shock.

Failure to install an earth leakage breaker may result in
electric shock, smoke, and/or fire.

Use the kind of power supply wires that are specified
in the installation manual.

The use of wrong kind of power supply wires may result in
current leak, electric shock, and/or fire.

Use breakers and fuses (current breaker, remote
switch <switch + Type-B fuse>, moulded case circuit
breaker) with the proper current capacity.

The use of wrong capacity fuses, steel wires, or copper
wires may result in malfunctions, smoke, and/or fire.

Periodically check the installation base for damage.

If the unit is left on a damaged platform, it may fall and
cause injury.

Properly install the drain pipes according to the in­structions in the installation manual. Keep them insu­lated to avoid dew condensation.

Improper plumbing work may result in water leakage and
damage to the furnishings.

Exercise caution when transporting products.

Products weighing more than 20 kg should not be carried

alone.

Do not carry the product by the PP bands that are used on

some products.

Do not touch the heat exchanger fins. They are sharp and

dangerous.

When lifting the unit with a crane, secure all four corners

to prevent the unit from falling.

Properly dispose of the packing materials.

Nails and wood pieces in the package may pose a risk of

injury.

Plastic bags may pose a risk of choking hazard to chil-

dren. Tear plastic bags into pieces before disposing of
them.

Do not spray water on the air conditioner or immerse
the air conditioner in water.

Otherwise, electric shock and/or fire may result.

When handling units, always wear protective gloves to
protect your hands from metal parts and high-tempera­ture parts.

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Before the test run

CAUTION

Turn on the unit at least 12 hours before the test run.

Keep the unit turned on throughout the season. If the unit is
turned off in the middle of a season, it may result in malfunc­tions.

To avoid the risk of electric shock or malfunction of the
unit, do not operate switches with wet hands.

Do not touch the refrigerant pipes with bare hands dur­ing and immediately after operation.

During or immediately after operation, certain parts of the
unit such as pipes and compressor may be either very cold
or hot, depending on the state of the refrigerant in the unit
at the time. To reduce the risk of frost bites and burns, do
not touch these parts with bare hands.

Do not operate the unit without panels and safety
guards.

Rotating, high-temperature, or high-voltage parts on the unit
pose a risk of burns and/or electric shock.

Do not turn off the power immediately after stopping
the operation.

Keep the unit on for at least five minutes before turning off
the power to prevent water leakage or malfunction.

Do not operate the unit without the air filter.

Dust particles may build up in the system and cause mal­functions.

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CONTENTS

I

II

III

IV

V

VI

VII

VIII

Read Before Servicing

[1] Read Before Servicing.............................................................................................................. 3

[2] Necessary Tools and Materials ................................................................................................ 4

[3] Piping Materials ........................................................................................................................ 5

[4] Storage of Piping ...................................................................................................................... 7

[5] Pipe Processing........................................................................................................................ 7

[6] Brazing...................................................................................................................................... 8

[7] Air Tightness Test..................................................................................................................... 9

[8] Vacuum Drying (Evacuation) ..................................................................................................10

[9] Refrigerant Charging .............................................................................................................. 12

[10] Remedies to be taken in case of a Refrigerant Leak............................................................ 12

[11] Characteristics of the Conventional and the New Refrigerants ............................................ 13

[12] Notes on Refrigerating Machine Oil...................................................................................... 14

Restrictions

[1] System configuration .............................................................................................................. 17

[2] Types and Maximum allowable Length of Cables .................................................................. 18

[3] Switch Settings and Address Settings .................................................................................... 19

[4] Sample System Connection ................................................................................................... 25

[5] An Example of a System to which an MA Remote Controller is connected ........................... 26

[6] An Example of a System to which an M-NET Remote Controller is connected ..................... 38

[7] An Example of a System to which both MA Remote Controller and M-NET Remote

Controller are connected ........................................................................................................40

[8] Restrictions on Pipe Length.................................................................................................... 43

Outdoor Unit Components

[1] Outdoor Unit Components and Refrigerant Circuit ................................................................. 57

[2] Control Box of the Outdoor Unit.............................................................................................. 60

[3] Outdoor Unit Circuit Board...................................................................................................... 64

[4] BC Controller Components..................................................................................................... 74

[5] Control Box of the BC Controller ............................................................................................77

[6] BC Controller Circuit Board .................................................................................................... 78

Remote Controller

[1] Functions and Specifications of MA and ME Remote Controllers .......................................... 83

[2] Group Settings and Interlock Settings via the ME Remote Controller .................................... 84

[3] Interlock Settings via the MA Remote Controller.................................................................... 88

[4] Using the built-in Temperature Sensor on the Remote Controller.......................................... 89

Electrical Wiring Diagram

[1] Electrical Wiring Diagram of the Outdoor Unit ........................................................................ 93

[2] Electrical Wiring Diagram of the BC Controller....................................................................... 96

[3] Electrical Wiring Diagram of Transmission Booster.............................................................. 105

Refrigerant Circuit

[1] Refrigerant Circuit Diagram .................................................................................................. 109

[2] Principal Parts and Functions ............................................................................................... 116

Control

[1] Functions and Factory Settings of the Dipswitches .............................................................. 125

[2] Controlling the Outdoor Unit ................................................................................................. 132

[3] Controlling BC Controller ...................................................................................................... 145

[4] Operation Flow Chart............................................................................................................ 146

Test Run Mode

[1] Items to be checked before a Test Run................................................................................ 155

[2] Test Run Method .................................................................................................................. 156

[3] Operating Characteristic and Refrigerant Amount................................................................ 157

[4] Adjusting the Refrigerant Amount......................................................................................... 157

[5] Refrigerant Amount Adjust Mode.......................................................................................... 160

[6] The following symptoms are normal. .................................................................................... 162

[7] Standard Operation Data (Reference Data) ......................................................................... 163

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CONTENTS

IX

X

Troubleshooting

[1] Error Code Lists.................................................................................................................... 179

[2] Responding to Error Display on the Remote Controller........................................................ 182

[3] Investigation of Transmission Wave Shape/Noise ............................................................... 270

[4] Troubleshooting Principal Parts............................................................................................ 273

[5] Refrigerant Leak ................................................................................................................... 314

[6] Compressor Replacement Instructions................................................................................. 316

[7] Servicing the BC controller ................................................................................................... 327

[8] Troubleshooting Using the Outdoor Unit LED Error Display................................................. 330

LED Monitor Display on the Outdoor Unit Board

[1] How to Read the LED on the Service Monitor ...................................................................... 333

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Read Before Servicing

[1] Read Before Servicing.......................................................................................................3

[2] Necessary Tools and Materials.......................................................................................... 4

[3] Piping Materials ................................................................................................................. 5

[4] Storage of Piping ...............................................................................................................7

[5] Pipe Processing.................................................................................................................7

[6] Brazing............................................................................................................................... 8

[7] Air Tightness Test..............................................................................................................9

[8] Vacuum Drying (Evacuation) ........................................................................................... 10

[9] Refrigerant Charging........................................................................................................ 12

[10] Remedies to be taken in case of a Refrigerant Leak .......................................................12

[11] Characteristics of the Conventional and the New Refrigerants .......................................13

[12] Notes on Refrigerating Machine Oil ................................................................................. 14

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IRead Befo re Servicing

[1] Read Before Servicing

1. Check the type of refrigerant used in the system to be serviced.
Refrigerant Type

Multi air conditioner for building application CITY MULTI R2 THMU-A, YHMU-A series R410A

2. Check the symptoms exhibited by the unit to be serviced.

Refer to this service handbook for symptoms relating to the refrigerant cycle.

3. Thoroughly read the safety precautions at the beginning of this manual.

4. Preparing necessary tools: Prepare a set of tools to be used exclusively with each type of refrigerant.

Refer to "Necessary Tools and Materials" for information on the use of tools.(page 4)

5. Verification of the connecting pipes: Verify the type of refrigerant used for the unit to be moved or replaced.

Use refrigerant pipes made of phosphorus deoxidized copper. Keep the inner and outer surfaces of the pipes clean and free

of such contaminants as sulfur, oxides, dust, dirt, shaving particles, oil, and water.

These types of contaminants inside the refrigerant pipes may cause the refrigerant oil to deteriorate.

6. If there is a leak of gaseous refrigerant and the remaining refrigerant is exposed to an open flame, a poisonous gas
hydrofluoric acid may form. Keep workplace well ventilated.

CAUTION

Install new pipes immediately after removing old ones to keep moisture out of the refrigerant circuit.
The use of refrigerant that contains chloride, such as R22, will cause the refrigerating machine oil to deteriorate.

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[2] Necessary Tools and Materials

Prepare the following tools and materials necessary for installing and servicing the unit.

Tools for use with R410A (Adaptability of tools that are for use with R22 or R407C)

1. To be used exclusively with R410A (not to be used if used with R22 or R407C)

Tools/Materials Use Notes

Gauge Manifold Evacuation and refrigerant charging Higher than 5.09MPa[738psi] on the

Charging Hose Evacuation and refrigerant charging The hose diameter is larger than the

Refrigerant Recovery Cylinder Refrigerant recovery

Refrigerant Cylinder Refrigerant charging The refrigerant type is indicated. The

Charging Port on the Refrigerant Cylinder Refrigerant charging The charge port diameter is larger

Flare Nut Connection of the unit with the pipes Use Type-2 Flare nuts.

2. Tools and materials that may be used with R410A with some restrictions

Tools/Materials Use Notes

Gas Leak Detector Gas leak detection The ones for use with HFC refrigerant

Vacuum Pump Vacuum drying May be used if a check valve adapter

Flare Tool Flare processing Flare processing dimensions for the

Refrigerant Recovery Equipment Refrigerant recovery May be used if compatible with

high-pressure side

conventional model.

cylinder is pink.

than that of the current port.

may be used.

is attached.

piping in the system using the new re­frigerant differ from those of R22. Re­fer to I [3] Piping Materials.

R410A.

3. Tools and materials that are used with R22 or R407C that may also be used with R410A

Tools/Materials Use Notes

Vacuum Pump with a Check Valve Vacuum drying

Bender Bending pipes

Torque Wrench Tightening flare nuts Only the flare processing dimensions

for pipes that have a diameter of
ø12.70 (1/2") and ø15.88 (5/8") have
been changed.

Pipe Cutter Cutting pipes

Welder and Nitrogen Cylinder Welding pipes

Refrigerant Charging Meter Refrigerant charging

Vacuum Gauge Vacuum level check

4. Tools and materials that must not be used with R410A

Tools/Materials Use Notes

Charging Cylinder Refrigerant charging Prohibited to use

Tools for R410A must be handled with special care to keep moisture and dust from infiltrating the cycle.

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[3] Piping Materials

Do not use the existing piping!

1. Copper pipe materials

O-material (Annealed) Soft copper pipes (annealed copper pipes). They can easily be bent with hands.

1/2H-material (Drawn) Hard copper pipes (straight pipes). They are stronger than the O-material (Annealed)

The distinction between O-materials (Annealed) and 1/2H-materials (Drawn) is made based on the strength of the pipes them-

selves.

2. Types of copper pipes

Maximum working pressure Refrigerant type

3.45 MPa [500psi] R22, R407C etc.

4.30 MPa [624psi] R410A etc.

3. Piping materials/Radial thickness

Use refrigerant pipes made of phosphorus deoxidized copper.
The operation pressure of the units that use R410A is higher than that of the units that use R22.
Use pipes that have at least the radial thickness specified in the chart below.
(Pipes with a radial thickness of 0.7 mm [28mil] or less may not be used.)

at the same radial thickness.

Pipe size (mm[in.]) Radial thickness (mm [mil]) Type

ø6.35 [1/4"] 0.8t [32t]

ø9.52 [3/8"] 0.8t [32t]

ø12.7 [1/2"] 0.8t [32t]

ø15.88 [5/8"] 1.0t [40t]

ø19.05 [3/4"] 1.0t [40t]

ø22.2 [7/8"] 1.0t [40t]

ø25.4 [1"] 1.0t [40t]

ø28.58 [1-1/8"] 1.0t [40t]

ø31.75 [1-1/4"] 1.1t [44t]

ø34.93 [1-3/8"] 1.2t [48t]

ø41.28 [1-5/8"] 1.4t [56t]

The pipes in the system that uses the refrigerant currently on the market are made with O-material (Annealed), even if the

pipe diameter is less than ø19.05 (3/4"). For a system that uses R410A, use pipes that are made with 1/2H-material (Drawn)
unless the pipe diameter is at least ø19.05 (3/4") and the radial thickness is at least 1.2t.

The figures in the radial thickness column are based on the Japanese standards and provided only as a reference. Use pipes

that meet the local standards.

O-material (Annealed)

1/2H-material,

H-material (Drawn)

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[ I Read Before Servicing ]

4. Thickness and refrigerant type indicated on the piping materials

Ask the pipe manufacturer for the symbols indicated on the piping material for new refrigerant.

5. Flare processing (O-material (Annealed) and OL-material only)

The flare processing dimensions for the pipes that are used in the R410A system are larger than those in the R22 system.

Flare processing dimensions (mm[in.])

A dimension (mm)

Pipe size (mm[in.])

R410A R22, R407C

ø6.35 [1/4"] 9.1 9.0

ø9.52 [3/8"] 13.2 13.0

ø12.7 [1/2"] 16.6 16.2

Dimension A

ø15.88 [5/8"] 19.7 19.4

ø19.05 [3/4"] 24.0 23.3

(ø19.05 pipes should have a radial thickness of 1.2 t and be made of annealed materials.)
If a clutch-type flare tool is used to flare the pipes in the system using R410A, the length of the pipes must be between 1.0
and 1.5 mm. For margin adjustment, a copper pipe gauge is necessary.

6. Flare nut

The flare nut type has been changed to increase the strength. The size of some of the flare nuts have also been changed.

Flare nut dimensions (mm[in.])

B dimension (mm)

Pipe size (mm[in.])

R410A R22, R407C

ø6.35 [1/4"] 17.0 17.0

ø9.52 [3/8"] 22.0 22.0

ø12.7 [1/2"] 26.0 24.0

Dimension B

ø15.88 [5/8"] 29.0 27.0

ø19.05 [3/4"] 36.0 36.0

The figures in the radial thickness column are based on the Japanese standards and provided only as a reference. Use pipes
that meet the local standards.

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[4] Storage of Piping

1. Storage location

Store the pipes to be used indoors. (Warehouse at site or owner's warehouse)
If they are left outdoors, dust, dirt, or moisture may infiltrate and contaminate the pipe.

2. Sealing the pipe ends

Both ends of the pipes should be sealed until just before brazing.
Keep elbow pipes and T-joints in plastic bags.

The new refrigerator oil is 10 times as hygroscopic as the conventional refrigerating machine oil (such as Suniso) and, if not
handled with care, could easily introduce moisture into the system. Keep moisture out of the pipes, for it will cause the oil to
deteriorate and cause a compressor failure.

[5] Pipe Processing

Use a small amount of ester oil, ether oil, or alkylbenzene to coat flares and flanges.

Use a minimum amount of oil.
Use only ester oil, ether oil, and alkylbenzene.

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[6] Brazing

No changes have been made in the brazing procedures. Perform brazing with special care to keep foreign objects (such as oxide
scale, water, and dust) out of the refrigerant system.

Example: Inside the brazed connection

Use of oxidized solder for brazing Use of non-oxidized solder for brazing

1. Items to be strictly observed

Do not conduct refrigerant piping work outdoors if raining.
Use non-oxidized solder.
Use a brazing material (BCuP-3) that requires no flux when brazing between copper pipes or between a copper pipe and

copper coupling.

If installed refrigerant pipes are not immediately connected to the equipment, then braze and seal both ends.

2. Reasons

The new refrigerating machine oil is 10 times as hygroscopic as the conventional oil and is more likely to cause unit failure if

water infiltrates into the system.

Flux generally contains chloride. Residual flux in the refrigerant circuit will cause sludge to form.

3. Notes

Do not use commercially available antioxidants because they may cause the pipes to corrode or refrigerating machine oil to
deteriorate.

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[7] Air Tightness Test

No changes have been made in the detection method. Note that a refrigerant leak detector for R22 will not detect an R410A leak.

Halide torch R22 leakage detector

1. Items to be strictly observed

Pressurize the equipment with nitrogen up to the design pressure (4.15MPa[601psi]), and then judge the equipment's air tight-

ness, taking temperature variations into account.

Refrigerant R410A must be charged in its liquid state (vs. gaseous state).

2. Reasons

Oxygen, if used for an air tightness test, poses a risk of explosion. (Only use nitrogen to check air tightness.)
Refrigerant R410A must be charged in its liquid state. If gaseous refrigerant in the cylinder is drawn out first, the composition

of the remaining refrigerant in the cylinder will change and become unsuitable for use.

3. Notes

Procure a leak detector that is specifically designed to detect an HFC leak. A leak detector for R22 will not detect an
HFC(R410A) leak.

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[8] Vacuum Drying (Evacuation)

(Photo1) 15010H (Photo2) 14010

Recommended vacuum gauge:
ROBINAIR 14010 Thermistor Vacuum Gauge

1. Vacuum pump with a reverse-flow check valve (Photo1)

To prevent the vacuum pump oil from flowing into the refrigerant circuit during power OFF or power failure, use a vacuum
pump with a reverse-flow check valve.
A reverse-flow check valve may also be added to the vacuum pump currently in use.

2. Standard of vacuum degree (Photo 2)

Use a vacuum pump that attains 0.5Torr(65Pa) or lower degree of vacuum after 5 minutes of operation, and connect it directly
to the vacuum gauge. Use a pump well-maintained with an appropriate lubricant. A poorly maintained vacuum pump may not
be able to attain the desired degree of vacuum.

3. Required precision of vacuum gauge

Use a vacuum gauge that registers a vacuum degree of 5Torr(650Pa) and measures at intervals of 1Torr(130Pa). (A recom­mended vacuum gauge is shown in Photo2.)
Do not use a commonly used gauge manifold because it cannot register a vacuum degree of 5Torr(650Pa).

4. Evacuation time

After the degree of vacuum has reached 5Torr(650Pa), evacuate for an additional 1 hour. (A thorough vacuum drying re-

moves moisture in the pipes.)

Verify that the vacuum degree has not risen by more than 1Torr(130Pa) 1hour after evacuation. A rise by less than

1Torr(130Pa) is acceptable.

If the vacuum is lost by more than 1Torr(130Pa), conduct evacuation, following the instructions in section 6. Special vacuum

drying.

5. Procedures for stopping vacuum pump

To prevent the reverse flow of vacuum pump oil, open the relief valve on the vacuum pump side, or draw in air by loosening
the charge hose, and then stop the operation.
The same procedures should be followed when stopping a vacuum pump with a reverse-flow check valve.

6. Special vacuum drying

When 5Torr(650Pa) or lower degree of vacuum cannot be attained after 3 hours of evacuation, it is likely that water has pen-

etrated the system or that there is a leak.

If water infiltrates the system, break the vacuum with nitrogen. Pressurize the system with nitrogen gas to

0.5kgf/cm

2

G(0.05MPa) and evacuate again. Repeat this cycle of pressurizing and evacuation either until the degree of vac-

uum below 5Torr(650Pa) is attained or until the pressure stops rising.

Only use nitrogen gas for vacuum breaking. (The use of oxygen may result in an explosion.)

HWE0803A GB

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[ I Read Before Servicing ]







7. Notes

To evacuate air from the entire system
Applying a vacuum through the check joints at the refrigerant service valve on the high and low pressure sides (BV1
and 2) is not enough to attain the desired vacuum pressure.
Be sure to apply a vacuum through the check joints at the refrigerant service valve on the high and low pressure
sides (BV1 and 2) and also through the check joints on the high and low pressure sides (CJ1 and 2).

To evacuate air only from the outdoor units
Apply a vacuum through the check joints on the high and low pressure sides (CJ1, and 2).

To evacuate air from the indoor units and extension pipes
Apply a vacuum through the check joints at the refrigerant service valve on the high and low pressure sides (BV1
and 2).

HWE0803A GB

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[ I Read Before Servicing ]

[9] Refrigerant Charging

Cylinder with a siphon

Cylinder without a siphon

Cylin-

Cylin-

der

der

Cylinder color R410A is pink. Refrigerant charging in the liquid state

Valve Valve

liquid

liquid

1. Reasons

R410A is a pseudo-azeotropic HFC blend (boiling point R32=-52°C[-62°F], R125=-49°C[-52°F]) and can almost be handled
the same way as a single refrigerant, such as R22. To be safe, however, draw out the refrigerant from the cylinder in the liquid
phase. If the refrigerant in the gaseous phase is drawn out, the composition of the remaining refrigerant will change and be­come unsuitable for use.

2. Notes

When using a cylinder with a siphon, refrigerant is charged in the liquid state without the need for turning it upside down. Check
the type of the cylinder on the label before use.

[10] Remedies to be taken in case of a Refrigerant Leak

If the refrigerant leaks out, it may be replenished. The entire refrigerant does not need to be replaced. (Charge refrigerant in the
liquid state.)
Refer to "IX [5] Refrigerant Leak".(page 314)

HWE0803A GB

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[ I Read Before Servicing ]

[11] Characteristics of the Conventional and the New Refrigerants

1. Chemical property

As with R22, the new refrigerant (R410A) is low in toxicity and chemically stable nonflammable refrigerant.
However, because the specific gravity of vapor refrigerant is greater than that of air, leaked refrigerant in a closed room will
accumulate at the bottom of the room and may cause hypoxia.
If exposed to an open flame, refrigerant will generate poisonous gases. Do not perform installation or service work in a con­fined area.

New Refrigerant (HFC type) Conventional Refriger-

ant (HCFC type)

R410A R407C R22

R32/R125 R32/R125/R134a R22

Composition (wt%) (50/50) (23/25/52) (100)

Type of Refrigerant Pseudo-azeotropic

Refrigerant

Non-azeotropic

Refrigerant

Single Refrigerant

Chloride Not included Not included Included

Safety Class A1/A1 A1/A1 A1

Molecular Weight 72.6 86.2 86.5

Boiling Point (°C/°F) -51.4/-60.5 -43.6/-46.4 -40.8/-41.4

Steam Pressure

1.557/226 0.9177/133 0.94/136

(25°C,MPa/77°F,psi) (gauge)

Saturated Steam Density
(25°C,kg/m

3

/77°F,psi)

64.0 42.5 44.4

Flammability Nonflammable Nonflammable Nonflammable

Ozone Depletion Coefficient (ODP)

Global Warming Coefficient (GWP)

Refrigerant Charging Method Refrigerant charging in

Replenishment of Refrigerant after a Refrigerant

*1

*2

0 0 0.055

1730 1530 1700

the liquid state

Refrigerant charging in

the liquid state

Refrigerant charging in

the gaseous state

Available Available Available

Leak

*1 When CFC11 is used as a reference
*2 When CO

is used as a reference

2

2. Refrigerant composition

R410A is a pseudo-azeotropic HFC blend and can almost be handled the same way as a single refrigerant, such as R22. To
be safe, however, draw out the refrigerant from the cylinder in the liquid phase. If the refrigerant in the gaseous phase is drawn
out, the composition of the remaining refrigerant will change and become unsuitable for use.
If the refrigerant leaks out, it may be replenished. The entire refrigerant does not need to be replaced.

3. Pressure characteristics

The pressure in the system using R410A is 1.6 times as great as that in the system using R22.

Pressure (gauge)

Temperature (°C/°F)

R410A R407C R22

MPa/psi MPa/psi MPa/psi

-20/-4 0.30/44 0.18/26 0.14/20

0/32 0.70/102 0.47/68 0.40/58

20/68 1.34/194 0.94/136 0.81/117

40/104 2.31/335 1.44/209 1.44/209

60/140 3.73/541 2.44/354 2.33/338

65/149 4.17/605 2.75/399 2.60/377

HWE0803A GB

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[ I Read Before Servicing ]

[12] Notes on Refrigerating Machine Oil

1. Refrigerating machine oil in the HFC refrigerant system

HFC type refrigerants use a refrigerating machine oil different from that used in the R22 system.
Note that the ester oil used in the system has properties that are different from commercially available ester oil.

Refrigerant Refrigerating machine oil

R22 Mineral oil

R407C Ester oil

R410A Ester oil

2. Effects of contaminants

*1

Refrigerating machine oil used in the HFC system must be handled with special care to keep contaminants out.
The table below shows the effect of contaminants in the refrigerating machine oil on the refrigeration cycle.

3. The effects of contaminants in the refrigerating machine oil on the refrigeration cycle.

Cause Symptoms Effects on the refrigerant cycle

Water infiltration Frozen expansion valve

and capillary tubes

Clogged expansion valve and capillary tubes
Poor cooling performance
Compressor overheat
Motor insulation failure
Burnt motor
Coppering of the orbiting scroll
Lock
Burn-in on the orbiting scroll

Clogged expansion valve, capillary tubes, and
drier
Poor cooling performance
Compressor overheat

Burn-in on the orbiting scroll

Hydrolysis

Air infiltration Oxidization

Adhesion to expansion valve and capillary
tubes

Dust, dirt

Infiltration of
contaminants

Infiltration of contaminants into the com­pressor

Sludge formation and ad­hesion
Acid generation
Oxidization
Oil degradation

Sludge formation and adhesion Clogged expansion valve and capillary tubes

Mineral oil
etc.

Poor cooling performance
Compressor overheat

Oil degradation Burn-in on the orbiting scroll

*1. Contaminants is defined as moisture, air, processing oil, dust/dirt, wrong types of refrigerant, and refrigerating machine oil.

HWE0803A GB

- 14 -

II

Restrictions

[1] System configuration ....................................................................................................... 17

[2] Types and Maximum allowable Length of Cables ...........................................................18

[3] Switch Settings and Address Settings ............................................................................. 19

[4] Sample System Connection.............................................................................................25

[5] An Example of a System to which an MA Remote Controller is connected.....................26

[6] An Example of a System to which an M-NET Remote Controller is connected...............38

[7] An Example of a System to which both MA Remote Controller and M-NET Remote

Controller are connected.................................................................................................. 40

[8] Restrictions on Pipe Length............................................................................................. 43

HWE0803A GB

- 15 -

- 16 -

[ II Restrictions ]

IIRestrictions

[1] System configuration

1. Table of compatible indoor units

The table below summarizes the types of indoor units that are compatible with different types of outdoor units.

Outdoor

units

Composing units Maximum total capacity

of connectable indoor

units

Maximum number
of connectable in-

door units

Types of connectable in-

door units

72 - - 36 - 108 18 P06 - P96 models

96 - - 48 - 144 24

R410A series indoor units

120 - - 60 - 180 30

144 72 72 72 - 216 36

168 96 72 84 - 252 42

192 96 96 96 - 288 48

216 120 96 108 - 324 50

240 120 120 120 - 360 50

1) "Maximum total capacity of connectable indoor units" refers to the sum of the numeric values in the indoor unit model names.

2) If the total capacity of the indoor units that are connected to a given outdoor unit exceeds the capacity of the outdoor unit, the
indoor units will not be able to perform at the rated capacity when they are operated simultaneously. Select a combination of
units so that the total capacity of the connected indoor units is at or below the capacity of the outdoor unit whenever possible.

HWE0803A GB

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[ II Restrictions ]

[2] Types and Maximum allowable Length of Cables

1. Wiring work

(1) Notes

1) Have all electrical work performed by an authorized electrician according to the local regulations and instructions in this man­ual.

2) Install external transmission cables at least 5cm [1-31/32"] away from the power supply cable to avoid noise interference.
(Do not put the control cable and power supply cable in the same conduit tube.)

3) Provide grounding for the outdoor unit as required.

4) Run the cable from the electric box of the indoor or outdoor unit in such way that the box is accessible for servicing.

5) Do not connect power supply wiring to the terminal block for transmission line. Doing so will damage the electronic compo­nents on the terminal block.

6) Use 2-core shielded cables as transmission cables.
Use a separate 2-core control cable for each refrigerant system. Do not use a single multiple-core cable to connect indoor

units that belong to different refrigerant systems. The use of a multiple-core cable may result in signal transmission errors and
malfunctions.

Outdoor unit

TB3TB7TB3TB

2-core shielded cable

TB3TB7TB3TB

2-core shielded cable

7

7

BC Controller

Indoor unit

Remote Controller

Outdoor unit

TB3TB7TB3TB

TB3TB7TB3TB

BC Controller

7

multiple-core cable

7

Indoor unit

Remote Controller

TB3: Terminal block for indoor-outdoor transmission line TB7: Terminal block for centralized control

(2) Control wiring

Different types of control wiring are used for different systems.
Refer to section "[5] An Example of a System to which an MA Remote Controller is connected - [7] An Example of a System
to which both MA Remote Controller and M-NET Remote Controller are connected" before performing wiring work.

Types and maximum allowable length of cables

Control lines are categorized into 2 types: transmission line and remote controller line.
Use the appropriate type of cables and observe the maximum allowable length specified for a given system. If a given system

has a long transmission line or if a noise source is located near the unit, place the unit away from the noise source to reduce
noise interference.

1) M-NET transmission line

Facility
type

All facility types

Type Shielded cable CVVS, CPEVS, MVVS

Cable type

Number of
cores

Cable size Larger than 1.25mm

2-core cable

2

[AWG16]

Maximum transmission
line distance between the
outdoor unit and the far-

200 m [656ft] max.

thest indoor unit

Maximum transmission
line distance for central­ized control and Indoor/
outdoor transmission line
(Maximum line distance

500 m [1640ft] max.
*The maximum overall line length from the power supply unit on the transmission lines for
centralized control to each outdoor unit or to the system controller is 200m [656ft] max.

via outdoor unit)

HWE0803A GB

- 18 -

[ II Restrictions ]

2) Remote controller wiring

MA remote controller

*1

M-NET remote controller

*2

Type VCTF, VCTFK, CVV, CVS, VVR, VVF, VCT Shielded cable MVVS

Number of
cores

Cable type

Cable size

Maximum overall line
length

2-core cable 2-core cable

0.3 to 1.25mm
[AWG22 to 16]
(0.75 to 1.25mm
[AWG18 to 16]

2 *3

2) *4

0.3 to 1.25mm
[AWG22 to 16]
(0.75 to 1.25mm
[AWG18 to 16]

The section of the cable that exceeds 10m

200 m [656ft] max.

[32ft] must be included in the maximum in­door-outdoor transmission line distance.

2 *3

2) *4

*1 MA remote controller refers to MA remote controller (PAR-20MAA, PAR-21MAA), MA simple remote controller, and

wireless remote controller.
*2 M-NET remote controller refers to ME remote controller and ME simple remote controller.
*3 The use of cables that are smaller than 0.75mm

2

[AWG18] is recommended for easy handling.

*4 When connected to the terminal block on the Simple remote controller, use cables that meet the cable size specifi-

cations shown in the parenthesis.

[3] Switch Settings and Address Settings

1. Switch setting

Refer to section "[5] An Example of a System to which an MA Remote Controller is connected - [7] An Example of a System
to which both MA Remote Controller and M-NET Remote Controller are connected" before performing wiring work.
Set the switches while the power is turned off.
If the switch settings are changed while the unit is being powered, those changes will not take effect, and the unit will not
function properly.

Units on which to set the switches Symbol Units to which the power must be shut off

CITY MULTI indoor unit Main/sub unit IC Outdoor units

LOSSNAY, OA processing unit

*1

M-NET remote controller Main/sub remote

LC Outdoor units

RC Outdoor units

*3

and Indoor units

*3

and LOSSNAY

*3

controller

MA remote controller Main/sub remote

MA Indoor units

controller

CITY MULTI outdoor unit

*2

OC,OS Outdoor units

BC controller Main BC Outdoor units

Sub1, 2 BS1, BS2 Outdoor units

*3

*3

and BC controller

*3

and BC controller

*1. Applicable when LOSSNAY units are connected to the indoor-outdoor transmission line.
*2. The outdoor units in the same refrigerant circuit are automatically designated as OC and OS in the order of capacity

from large to small (if two or more units have the same capacity, in the order of address from small to large).

*3. Turn off the power to all the outdoor units in the same refrigerant circuit.

HWE0803A GB

- 19 -

[ II Restrictions ]

2. M-NET Address settings
(1) Address settings table

The need for address settings and the range of address setting depend on the configuration of the system.

Unit or controller Sym-

bol

Address
setting

Setting method Factory

range

CITY MULTI
indoor unit

M-NET
adapter

M-NET con­trol interface

Free Plan
adapter

LOSSNAY, OA processing unit LC 0, 01 to

M-NET re­mote con­troller

Main/sub unit IC 0, 01 to

Main remote

RC 101 to

controller

Sub remote

RC 151 to

controller

50

50

150

200

*1 *4 *6

*1 *4 *6

*3

Assign the smallest address to the main indoor unit in the
group, and assign sequential address numbers to the rest
of the indoor units in the same group.
In an R2 system with a sub BC controller, make the set­tings for the indoor units in the following order.
(i) Indoor unit to be connected to the main BC controller
(ii) Indoor unit to be connected to sub BC controller 1
(iii) Indoor unit to be connected to sub BC controller 2
Make the settings for the indoor units in the way that the
formula "(i) < (ii) < (iii)" is true.

Assign an arbitrary but unique address to each of these
units after assigning an address to all indoor units.

Add 100 to the smallest address of all the indoor units in
the same group.

Add 150 to the smallest address of all the indoor units in
the same group.

MA remote controller MA No address settings required. (The main/sub setting must be made if

2 remote controllers are connected to the system.)

CITY MULTI outdoor unit OCOS0, 51 to

100

*6

Auxiliary
outdoor unit

BC controller
(main)

BC 0, 51 to

100

*6

Assign an address that equals the lowest address of the in-

*1 *2

*1 *2

door units in the same refrigerant circuit plus 50.

Assign sequential addresses to the outdoor units in the

same refrigerant circuit. The outdoor units in the same re­frigerant circuit are automatically designated as OC and

*5

OS.

Assign an address that equals the address of the outdoor

unit in the same refrigerant system plus 1.

If a given address overlaps any of the addresses that are

assigned to the outdoor units or to the sub BC controller,
use a different, unused address within the setting range.

BC controller
(sub1, 2)

BS1
BS2

51 to
100

Assign an address to both the sub BC controller 1 and 2

*2

that equals the lowest address of the indoor units that
are connected to each of them plus 50.

If a sub BC controller is connected, the automatic startup

function is not available.

System
controller

Group remote con-

GRSC201 to

troller

System remote con­troller

ON/OFF remote con­troller

SR
SC

AN
SC

Schedule timer (com­patible with M-NET)STSC

Central controller

TRSC0, 201 to

G(B)-50A

250

250

Assign an address that equals the sum of the smallest
group number of the group to be controlled and 200.

Assign an arbitrary but unique address within the range
listed on the left to each unit.

Assign an address that equals the sum of the smallest
group number of the group to be controlled and 200.

Assign an arbitrary but unique address within the range
listed on the left to each unit.

Assign an arbitrary but unique address within the range
listed on the left to each unit. The address must be set to
"0" to control the K-control unit.

LM adapter SC 201 to

250

Assign an arbitrary but unique address within the range
listed on the left to each unit.

address

setting

00

00

101

Main

00

00

201

202

000

247

*1. If a given address overlaps any of the addresses that are assigned to other units, use a different, unused address within the

setting range.

*2. To set the outdoor unit address or the auxiliary outdoor unit address to "100," set the rotary switches to "50."
*3. To set the M-NET remote controller address to "200," set the rotary switches to "00."
*4. Some models of indoor units have two or three control boards.

Assign an address to the No.1, No. 2, and No. 3 control boards so that the No. 2 control board address equals the No. 1 control
board address plus 1, and that the No. 3 control board address equals the No. 1 control board address plus 2.

*5. The outdoor units in the same refrigerant circuit are automatically designated as OC, and OS. They are designated as OC,

and OS in the descending order of capacity (ascending order of address if the capacities are the same).

*6. No address settings are required for units in a system with a single outdoor unit (with some exceptions).

Address setting is required if a sub BC controller is connected.

HWE0803A GB

- 20 -

[ II Restrictions ]

(2) Power supply switch connector connection on the outdoor unit

(Factory setting: The male power supply switch connector is connected to CN41.)

There are limitations on the total number of units that are connectable to each refrigerant system. Refer to the System Design
Manual for details.

System configura­tion

Connection to
the system con­troller

Power supply unit
for transmission
lines

Group operation
of units in a sys­tem with multiple

Power supply switch connector connection

outdoor units

System with one
outdoor unit

System with multi­ple outdoor units

_ _ _ Leave CN41 as it is

(Factory setting)

Not connected _ Not grouped

Grouped Disconnect the male connector from the fe-

With connection
to the indoor
unit system

With connection
to the central­ized control sys­tem

Not required Grouped/not

grouped

Not required
(Powered from

*1

Grouped/not
grouped

the outdoor unit)

Required *1 Grouped/not

grouped

male power supply switch connector (CN41)
and connect it to the female power supply
switch connector (CN40) on only one of the
outdoor units.

*Connect the S (shielded) terminal on the

terminal block (TB7) on the outdoor unit
whose CN41 was replaced with CN40 to
the ground terminal ( ) on the electric box.

Leave CN41 as it is
(Factory setting)

*2

*1 The need for a power supply unit for transmission lines depends on the system configuration.
*2 The replacement of the power jumper connector from CN41 to CN40 must be performed on only one outdoor unit in the

system.

(3) Settings for the centralized control switch for the outdoor unit (Factory setting: SW2-1 are set to OFF.)

System configuration Centralized control switch settings

*1

Connection to the system controller Not connected Leave it to OFF. (Factory setting)

Connection to the system controller Connected

*2

ON

*1. Set SW2-1 on all outdoor units in the same refrigerant circuit to the same setting.
*2. When only the LM adapter is connected, leave SW2-1 to OFF (as it is).

(4) Selecting the position of temperature detection for the indoor unit (Factory setting: SW1-1 set to "OFF".)

To stop the fan during heating Thermo-OFF (SW1-7 and 1-8 on the indoor units to be set to ON), use the built-in thermistor
on the remote controller or an optional thermistor.

1) To use the built-in sensor on the remote controller, set the SW1-1 to ON.
Some models of remote controllers are not equipped with a built-in temperature sensor.

Use the built-in temperature sensor on the indoor unit instead.

When using the built-in sensor on the remote controller, install the remote controller where room temperature can be detected.

(Note) Factory setting for SW1-1 on the indoor unit of the All-Fresh Models is ON.

2) When an optional temperature sensor is used, set SW1-1 to OFF, and set SW3-8 to ON.
When using an optional temperature sensor, install it where room temperature can be detected.

HWE0803A GB

- 21 -

[ II Restrictions ]

(5) Various start-stop controls (Indoor unit settings)

Each indoor unit (or group of indoor units) can be controlled individually by setting SW 1-9 and 1-10.

Function

Power ON/OFF by the

*1,*2,*3

plug

Automatic restoration
after power failure

Operation of the indoor unit when the operation is resumed after the unit

was stopped

Indoor unit will go into operation regardless of its operation status before
power off (power failure). (In approx. 5 minutes)

Indoor unit will go into operation if it was in operation when the power was
turned off (or cut off due to power failure). (In approx. 5 minutes)

Indoor unit will remain stopped regardless of its operation status before

Setting (SW1)

910

OFF ON

ON OFF

OFF ON

power off (power failure).

*1. Do not cut off power to the outdoor unit. Cutting off the power supply to the outdoor unit will cut off the power supply to the

crankcase heater and may cause the compressor to malfunction when the unit is put back into operation.
*2. Not applicable to units with a built-in drain pump or humidifier.
*3. Models with a built-in drain pump cannot be turned on/off by the plug individually. All the units in the same refrigerant cir-

cuits will be turned on or off by the plug.
*4. Requires that the dipswitch settings for all the units in the group be made.
*5. To control the external input to and output from the air conditioners with the PLC software for general equipment via the

G(B)-50A, set SW1-9 and SW1-10 to ON. With these settings made, the power start-stop function becomes disabled. To

use the auto recovery function after power failure while these settings are made, set SW1-5 to ON.

(6) Miscellaneous settings

Cooling-only setting for the indoor unit: Cooling only model (Factory setting: SW3-1 "OFF.")
When using indoor unit as a cooling-only unit, set SW3-1 to ON.

(7) Various types of control using input-output signal connector on the outdoor unit (various connection options)

*4 *5

Type Usage Function

Input Prohibiting cooling/heating operation (thermo OFF) by an external

DEMAND (level) CN3D

input to the outdoor unit.

Performs a low level noise operation of the outdoor unit by an ex­ternal input to the outdoor unit.

Low-noise mode

*3 *4

(level)

Terminal

to be

*1

used

*2

Option

Adapter for
external input
(PAC­SC36NA-E)

* It can be used as the silent operation device for each refrigerant
system.

Forces the outdoor unit to perform a fan operation by receiving sig­nals from the snow sensor.

*5

Cooling/heating operation can be changed by an external input to

Snow sensor signal
input (level)

Auto-changeover CN3N

CN3S

the outdoor unit.

Out-

How to extract signals from the outdoor unit

put

*It can be used as an operation status display device.
*It can be used for an interlock operation with external devices.

Operation status of
the compressor

Error status

*5

*6

CN51 Adapter for

external out­put
(PAC­SC37SA-E)

*1. For detailed drawing, refer to "Example of wiring connection".
*2. For details, refer to 1) through 4) shown below.
*3. Low-noise mode is valid when Dip SW4-4 on the outdoor unit is set to OFF. When DIP SW4-4 is set to ON, 4 levels of

on-DEMAND are possible, using different configurations of low-noise mode input and DEMAND input settings.When 2
or more outdoor units exist in one refrigerant circuit system, 8 levels of on-DEMAND are possible.

*4. By setting Dip SW5-5, the Low-noise mode can be switched between the Capacity priority mode and the Low-noise pri-

ority mode.
When SW5-5 is set to ON: The low-noise mode always remains effective.
When SW5-5 is set to OFF: The low noise mode is cancelled when certain outside temperature or pressure criteria are
met, and the unit goes into normal operation (capacity priority mode).

Low-noise mod is effective. Capacity priority mode becomes effective.

Cooling Heating Cooling Heating

TH7<30°C[86°F] and
63HS1<32kg/cm

2

TH7>3°C[37°F] and
63LS>4.6kg/cm

2

TH7>35°C[95°F] or
63HS1>35kg/cm

2

TH7<0°C[32°F] or
63LS<3.9kg/cm

2

*5. Each outdoor unit in the system with multiple outdoor units requires the signal input/output setting to be made.
*6. Take out signals from the outdoor unit (OC) if multiple outdoor units exist in a single system.

HWE0803A GB

- 22 -

[ II Restrictions ]

CAUTION

1) Wiring should be covered by insulation tube with supplementary insulation.

2) Use relays or switches with IEC or equivalent standard.

3) The electric strength between accessible parts and control circuit should have 2750V or more.

Example of wiring connection

(1) CN51

Distant control
board

ecruosrewoppmaL

1

L

L

2

L1 : Outdoor unit error display lamp
L2 : Compressor operation lamp (compressor running state)
X, Y : Relay (coil =<0.9W : DC12V)

1. Optional part : PAC-SC37SA-E or field supply.

Relay circuit Adapter

X
Y

Y

X

Preparations

in the field

Maximum cable
length is 10m

1

5
4
3

(3) CN3N

Relay circuit

X

Y

Preparations

in the field

Adapter

2

1
2

3

Maximum cable
length is 10m

Outdoor unit
control board

CN3N

Y

X : Cooling / Heating
Y : Validity / Invalidity of X
X,Y : Relay

2. Optional part : PAC-SC36NA-E or field supply.

Outdoor unit
control board

CN51

OFF

ON

Contact rating voltage >= DC15V
Contact rating current >= 0.1A
Minimum applicable load =< 1mA at DC

(2) CN3S

Relay circuit

Preparations

X : Relay

Snow sensor : The outdoor fan runs when X is closed

X

OFF

Normal

CoolingONHeating

Outdoor unit

1
2

3

2

control board

Adapter

X

in the field

2. Optional part : PAC-SC36NA-E or field supply.

Maximum cable
length is 10m

Contact rating voltage >= DC15V
Contact rating current >= 0.1A
Minimum applicable load =< 1mA at DC

in stop mode or thermostat mode.

CN3S

(4) CN3D

Relay circuit

Preparations

in the field

X : Low-noise mode
Y : Compressor ON/OFF
X,Y : Relay

2. Optional part : PAC-SC36NA-E or field supply.

Adapter

X

Y

Maximum cable
length is 10m

Contact rating voltage >= DC15V
Contact rating current >= 0.1A
Minimum appicable load =< 1mA at DC

1
2

3

Outdoor unit

2

control board

CN3D

1
2

3

Outdoor unit

2

control board

CN3D

Relay circuit

X

Preparations

in the field

X : Low-noise mode
X : Relay

Low-noise mode : The noise level is reduced by controlling the maximum

Contact rating voltage >= DC15V
Contact rating current >= 0.1A
Minimum applicable load =< 1mA at DC

2. Optional part : PAC-SC36NA-E or field supply.

Adapter

Maximum cable
length is 10m

fan frequency and maximum compressor frequency.

HWE0803A GB

- 23 -

[ II Restrictions ]

1) SW4-4: OFF (Compressor ON/OFF, Low-noise mode)

CN3D 1-3P Compressor ON/OFF

Open Compressor ON

Short-circuit Compressor OFF

*1

CN3D 1-2P Low-noise mode

*2

Open OFF

Short-circuit ON

*1. When SW4-4 on the outdoor unit in one refrigerant circuit system is set to ON , this function cannot be used.
*2. This function can be enabled when the 4-step demand control is enabled. Input the order to CN3D 1-2P on the outdoor unit

whose SW4-4 is set to OFF.

2) When SW4-4 on one outdoor unit in one refrigerant circuit system is set to ON (4 levels of on-DEMAND)

(*3)

CN3D 1-2P

CN3D 1-3P Open Short-circuit

Open 100% (No DEMAND) 75%

Short-circuit 0% (Compressor OFF) 50%

*3. Input the order to CN3D on the outdoor unit whose SW4-4 is set to ON.

Note the following steps to be taken when using the STEP DEMAND
(Example) When switching from 100% to 50%

Demand control
steps

If the step listed as the wrong example above is taken, thermo may go off.
The percentage of the demand listed in the table above is an approximate value based on the
compressor volume and does not necessarily correspond with the capacity.
When this function is enabled, the night mode cannot be enabled.

(Wrong)

(Correct)

100%

100%

0%

75%

50%

50%

3) When SW4-4 on the two outdoor units in one refrigerant circuit system is set to ON (8 levels of on-DEMAND)

8 levels of on-DEMAND No.2 CN3D

1-2P Open Short-circuit

No.1 CN3D 1-2P 1-3P Open Short-circuit Open Short-circuit

Open Open 100% 50% 88% 75%

Short-circuit 50% 0% 38% 25%

Short-circuit Open 88% 38% 75% 63%

Short-circuit 75% 25% 63% 50%

*3. Input the order to CN3D on the outdoor unit whose SW4-4 is set to ON.
*4. CN3D of No. 1, 2, 3 can be selected arbitrary with the outdoor unit whose SW4-4 is set to ON.

(*3, *4)

HWE0803A GB

- 24 -

[ II Restrictions ]

[4] Sample System Connection

Examples of typical system connection are shown on pages [5] to [7].
Refer to the Installation Manual that came with each device or controller for details.

(1) An example of a system to which an MA remote controller is connected

System

configuration

System with one out-

1

2

door unit

System with one out-

door unit

Connection to the system controller

NO

NO

Address start up for in-

door and outdoor units

address setup

address setup

Grouping of units in a

3

system with multiple

outdoor units

System with one out-

4

5

6

door unit

System with one out-

door unit

System with one out-

door unit

With connection to transmission line

for centralized control

With connection to indoor-outdoor

With connection to transmission line

for centralized control

NO

transmission line

address setup

address setup

address setup

address setup

(2) An example of a system to which an M-NET remote controller is connected

System

configuration

System with one out-

1

door unit

Connection to the system controller

With connection to transmission line

for centralized control

Address start up for indoor

and outdoor units

address setup

Automatic

Manual

Manual

Manual

Manual

Manual

Manual

Notes

Connection of
multiple LOSS­NAY units

Connection of
multiple LOSS­NAY units

Notes

(3) An example of a system to which both MA remote controller and M-NET remote controller are connected

System

configuration

System with one out-

1

door unit

Connection to the system controller

With connection to transmission

line for centralized control

Address start up for in­door and outdoor units

Manual

address setup

Notes

HWE0803A GB

- 25 -

[ II Restrictions ]

[5] An Example of a System to which an MA Remote Controller is connected

1. System with one outdoor unit (automatic address setup for both indoor and outdoor units)
(1) Sample control wiring

Leave the male
connector on
CN41 as it is.
SW2-1 OFF

OS

00

TB3

M1 M2 M1 M2 M1 M2

TB7

S

Leave the male
connector on
CN41 as it is.
SW2-1 OFF

OC

00

TB3

M1 M2

TB7

L3L1 L2

BC

00

TB02

S

M1 M2

S

M1

TB5

M2

IC

00

S

L4 L5

15

TB

12

m1

GroupGroup

00

TB5STB

M1

M2

IC

15

12

Interlock operation with
the ventilation unit

LC

00

TB5

M1

M2

S

*1

S

M1M2

TB02

00

BS

*1. When BS is connected to the system,
automatic address setup is not available.

L11

m4

A1 B2

MA

(2) Cautions

1) M-NET remote controller and MA remote controller can­not both be connected to the same group of indoor units.

2) No more than 2 MA remote controllers can be connected
to a group of indoor units.

3) When the number of the connected indoor units is as
shown in the table below, one or more transmission
boosters (sold separately) are required.
To connect two transmission boosters, connect them in
parallel. (Observe the maximum number of connectable
indoor units that are listed in the specifications for each
outdoor unit.)

Number of transmission
booster (sold separately) re­quired

1 unit 2 units

When the P72 and P96 models
are not included in the connect­ed indoor units

When the P72 and P96 models
are included in the connected
indoor units

27 - 50 units -

21 - 39 units 40 - 50 units

The table above shows the number of transmission

boosters that is required by the system with three BC
controllers. For each BC controller that is subtracted
from the above-mentioned system, two additional indoor
units can be connected.

M1

A1 B2

MA

TB5

M2

A1 B2

MA

L12 L13

IC

15

TB

12

S

m5

A1 B2

MA

A1 B2

RC

GroupGroup

0000

TB5STB

M1

M2

IC

A1 B2

15

12

A1 B2

MA

MA

IC

00

15

TB5STB

M1

M2

12

m2

m3

4) Automatic address setup is not available if start-stop in­put(CN32, CN51, CN41) is used for a group operation of
indoor units. Refer to "[5] 2. Manual address setup for
both indoor and outdoor units"

5) To connect more than 2 LOSSNAY units to indoor units
in the same system, refer to the next section "[5] 2. An
example of a system with one outdoor unit to which 2 or
more LOSSNAY units are connected".

(3) Maximum allowable length

1) Indoor/outdoor transmission line

2

Maximum distance (1.25mm

[AWG16] or larger)
L1 +L2+L3+L4+L5 200m[656ft]
L1 +L2+L3+L11+L12+L13 200m[656ft]

2) Transmission line for centralized control
No connection is required.

3) MA remote controller wiring
Maximum overall line length

(0.3 to 1.25mm

2

[AWG22 to 16])
m1 200m [656ft]
m2+m3 200m [656ft]
m4+m5 200m [656ft]

- 26 -

GBHWE0803A

[ II Restrictions ]

(4) Wiring method

1) Indoor/outdoor transmission line
Daisy-chain terminals M1 and M2 of the terminal block

for indoor-outdoor transmission line (TB3) on the outdoor
units (OC and OS), of the terminal block for indoor-out­door transmission line (TB02) on the main BC controller
(BC), and of the terminal block for indoor-outdoor trans­mission line (TB5) on each indoor unit (IC). (Non-polar­ized two-wire)

Only use shielded cables.

The outdoor units in the same refrigerant circuit are au­tomatically designated as OC and OS in the order of ca­pacity from large to small (if two or more units have the
same capacity, in the order of address from small to
large).

Shielded cable connection

Daisy-chain the ground terminal ( ) on the outdoor
units (OC and OS), the S terminal of the terminal block
(TB02) on the BC controller (BC), and the S terminal of
the terminal block (TB5) on the indoor unit (IC) with the
shield of the shielded cable.

2) Transmission line for centralized control
No connection is required.

3) MA remote controller wiring
Connect terminals 1 and 2 on the terminal block for MA

remote controller line (TB15) on the indoor unit (IC) to the
terminal block on the MA remote controller (MA).
(Non-polarized two-wire)

When 2 remote controllers are connected to the sys­tem

When 2 remote controllers are connected to the system,
connect terminals 1 and 2 of the terminal block (TB15) on
the indoor unit (IC) to the terminal block on the two MA
remote controllers.

Set one of the MA remote controllers as a sub controller.

(Refer to the Instruction Manual for the MA remote con­troller for the setting method.)

Group operation of indoor units

To perform a group operation of indoor units (IC), daisy­chain terminals 1 and 2 on the terminal block (TB15) on
all indoor units (IC) in the same group, and then connect
terminals 1 and 2 on the terminal block (TB15) on the in­door unit on one end to the terminal block on the MA re­motecontroller. (Non-polarized two-wire)

When performing a group operation of indoor units that

have different functions, "Automatic indoor/outdoor ad­dresssetup" is not available.

4) LOSSNAY connection
Connect terminals M1 and M2 on the terminal

block(TB5) on the indoor unit (IC) to the appropriate ter­minals on the terminal block (TB5) on LOSSNAY (LC).
(Non-polarized two-wire)

Interlock operation setting with all the indoor units in the

same system will automatically be made. (It is required
that the Lossnay unit be turned on before the outdoo­runit.)

When performing an interlocked operation of part of the

indoor units in the system with a LOSSNAY unit, using a
LOSSNAY unit alone without interlocking it with any
units, performing an interlock operation of more than 16
indoor units with a LOSSNAY unit, or connecting two or
more LOSSNAY units to the same refrigerant system,
the automatic IC/OC address setup function is not avail­able.

5) Switch setting
No address settings required.

(5) Address setting method

Proce-

dures

Unit or controller

1 Indoor unit Main unit IC No settings

2 LOSSNAY LC No settings

3MA

remote con­troller

4 Outdoor unit OCOSNo settings

5 Auxiliary

outdoor unit BCcontroller

Sub unit IC

Main

MA No settings
remote con­troller

Sub

MA Sub
remote con­troller

BC No settings

Address set-

ting range

required.

required.

required.

remote con­troller

required.

required.

Setting method Notes

- Port number setting is re-

Factory

setting

00
quired
To perform a group opera­tion of indoor units that fea­ture different functions, the
automatic IC/OC address
setup function is not avail­able.

-00

-Main

Settings to be
made with the
Sub/Main
switch

-00

-00

The outdoor units in the same refrigerant circuit are automatically designated as OC and OS.
They are designated as OC and OS in the descending order of capacity (ascending order of address if the capacities are the
same).

HWE0803A GB

27- 27 -

[ II Restrictions ]

2. An example of a system with one outdoor unit to which 2 or more LOSSNAY units are connected
(manual address setup for both indoor and outdoor units)

(1) Sample control wiring

Interlock operation with the ventilation unit

Leave the male
connector on
CN41 as it is.
SW2-1 OFF

OS

52

TB3

M1 M2

L1 L2

Leave the male
connector on
CN41 as it is.
SW2-1 OFF

TB7

M1 M2

S

TB3

M1 M2

L3

OC

51

TB7

M1 M2

BC

53

TB02

S

M1 M2

S

IC

01

TB5STB

M1M2 M1 M2 M1 M2

L4 L5

GroupGroup

15

12

IC

02

TB5STB

15

12

TB5

LC

05

S

M1 M2

TB02

57

BS

A1 B2

MA

S

L11

Group

IC

TB5

S

IC

L12 L13

15

TB

12

A1 B2

MA

IC

0403

TB5STB

IC

A1 B2

MA

15

12

LC

06

TB5

M1M2M1M2M1M2

S

0807

TB5

15

TB

12

S

A1 B2

TB5STB

M1M2M1M2

15

12

A1 B2

* If the BC address overlaps any of the addresses that are assigned to either the OC, OS, or BS, use a different, unused address.
OC, OS, and BS addresses (lowest indoor unit address in the group plus +50) have higher priority than the BS address.

(2) Cautions

1) M-NET remote controller and MA remote controller can­not both be connected to the same group of indoor units.

2) No more than 2 MA remote controllers can be connected
to a group of indoor units.

3) When the number of the connected indoor units is as
shown in the table below, one or more transmission
boosters (sold separately) are required.
To connect two transmission boosters, connect them in
parallel. (Observe the maximum number of connectable
indoor units that are listed in the specifications for each
outdoor unit.)

Number of transmission
booster (sold separately)
required

1 unit 2 units

When the P72 and P96 models are not in­cluded in the connected indoor units

When the P72 and P96 models are includ­ed in the connected indoor units

27 - 50
units

21 - 39
units

40 - 50
units

-

MA

MA

The table above shows the number of transmission

boosters that is required by the system with three BC
controllers. For each BC controller that is subtracted
from the above-mentioned system, two additional indoor
units can be connected.

(3) Maximum allowable length

1) Indoor/outdoor transmission line
Same as [5] 1.

2) Transmission line for centralized control
No connection is required.

3) MA remote controller wiring
Same as [5] 1.

- 28 -

GBHWE0803A

[ II Restrictions ]

(4) Wiring method

1) Indoor/outdoor transmission line
Daisy-chain terminals M1 and M2 of the terminal block

for indoor-outdoor transmission line (TB3) on the outdoor
units (OC and OS), of the terminal block for indoor-out­door transmission line (TB02) on the main and sub BC
controllers (BC and BS), and of the terminal block for in­door-outdoor transmission line (TB5) on each indoor unit
(IC). (Non-polarized two-wire)

Only use shielded cables.

The outdoor units in the same refrigerant circuit are au­tomatically designated as OC and OS in the order of ca­pacity from large to small (if two or more units have the
same capacity, in the order of address from small to
large).

Shielded cable connection

Daisy-chain the ground terminal ( ) on the outdoor
units (OC and OS), the S terminal of the terminal block
(TB02) on BC and BS, and the S terminal of the terminal
block (TB5) on the indoor unit (IC) with the shield of the
shielded cable.

(5) Address setting method

Proce-

dures

1 Indoor

Unit or controller

Main unit IC 01 to 50

Address

setting

range

unit

Sub unit

2 LOSSNAY LC 01 to 50

3MA

remote
controller

Main
remote
controller

Sub
remote
controller

MA No set-

tings re­quired.

MA Sub

remote
controller

4 Outdoor unit OCOS51 to 100

5 Auxiliary

outdoor

BCcon­troller (Sub)

BS 51 to 100

unit

BC control­ler (Main)

BC OC (or OS if it exists) +1

2) Transmission line for centralized control
No connection is required.

3) MA remote controller wiring
Same as [5] 1.

When 2 remote controllers are connected to the sys­tem

Same as [5] 1.

Group operation of indoor units

Same as [5] 1.

4) LOSSNAY connection
Connect terminals M1 and M2 on the terminal block

(TB5) on the indoor unit (IC) to the appropriate terminals
on the terminal block (TB5) on LOSSNAY (LC). (Non-po­larized two-wire)

Interlock setting between the indoor units and LOSS-

NAY units must be entered on the remote controller. (Re­fer to "IV [3] Interlock Settings via the MA Remote
Controller" or the installation manual for the MA remote
controller for the setting method.)

5) Switch setting
Address setting is required as follows.

Setting method Notes

Assign the smallest address to the main

unit in the group.

In a system with a sub BC controller,

make the settings for the indoor units in
the following order.

(i) Indoor unit to be connected to the main

BC controller

(ii) Indoor unit to be connected to sub BC

controller 1

(iii) Indoor unit to be connected to sub BC

controller 2
Make the settings for the indoor units in
the way that the formula "(i) < (ii) < (iii)"
is true.

Assign sequential numbers starting with
the address of the main unit in the same
group +1. (Main unit address +1, main unit
address +2, main unit address +3, etc.)

Assign an arbitrary but unique address to
each of these units after assigning an ad­dress to all indoor units.

-Main

Settings to be made with the Sub/
Main switch

Assign sequential address to the out door

units in the same refrigerant circuit.

The outdoor units are automatically des-

ignated as OC and OS.(Note)

Assign an address that equals the sum of
the smallest address of the indoor units
that are connected to the sub BC controller
and 50.

Port number setting is

required

To perform a group op-

eration of indoor units
that feature different
functions, designate
the indoor unit in the
group with the greatest
number of functions as
the main unit.

None of these addresses may
overlap any of the indoor unit
addresses.

To set the address to 100,

set the rotary switches to 50.

If the addresses that is as-

signed to the main BC con­troller overlaps any of the
addresses that are assigned
to the outdoor units or to the
sub BC controller, use a dif­ferent, unused address with­in the setting range.

The use of a sub BC control-

ler requires the connection
of a main BC controller.

Fac-

tory
set­ting

00

00

00

The outdoor units in the same refrigerant circuit are automatically designated as OC and OS.
They are designated as OC and OS in the descending order of capacity (ascending order of address if the capacities are the
same).

HWE0803A GB

29- 29 -

[ II Restrictions ]

3. Group operation of units in a system with multiple outdoor units
(1) Sample control wiring

L12

IC

01

15

12

m2

A1 B2

Leave the male
connector on
CN41 as it is.
SW2-1 OFF

OS

52

TB3

M1 M2

TB7

M1 M2

L11

CN41 CN40 Replace

SW2-1 OFF

OC

51

TB3

M1 M2

TB7

S

Not
Connect

M1 M2

S

Connect

BC

53

TB02

M1 M2

TB5STB

S

M1 M2 M1 M2

Group

TB5STB

Interlock operation with
the ventilation unit

GroupGroup

TB5

M1 M2

LC

07

S

IC

03

15

12

A1 B2

TB5STB

M1 M2

IC

06

15

12

A1 B2

L31

Leave the male
connector on
CN41 as it is.
SW2-1 OFF

M1 M2

M1 M2

TB3

TB7

L21

Leave the male
connector on
CN41 as it is.
SW2-1 OFF

Not
Connect

M1 M2

TB3

TB7

OC

55

S

Not
Connect

M1 M2M1 M2

BC

57

TB02

S

M1 M2

OS

56

S

(2) Cautions

1) M-NET remote controller and MA remote controller can­not both be connected to the same group of indoor units.

2) No more than 2 MA remote controllers can be connected
to a group of indoor units.

3) Do not connect the terminal blocks (TB5) on the indoor
units that are connected to different outdoor units with
each other.

4) Replacement of male power jumper connector (CN41)
must be performed only on one of the outdoor units.

5) Provide grounding to S terminal on the terminal block for
transmission line for centralized control (TB7) on only
one of the outdoor units.

6) When the number of the connected indoor units is as
shown in the table below, one or more transmission
boosters (sold separately) are required.
To connect two transmission boosters, connect them in
parallel. (Observe the maximum number of connectable
indoor units that are listed in the specifications for each
outdoor unit.)

Number of transmission
booster (sold separately) re­quired

1 unit 2 units

When the P72 and P96 mod­els are not included in the
connected indoor units

When the P72 and P96 mod­els are included in the con­nected indoor units

27 - 50 units -

21 - 39 units 40 - 50 units

TB5

MA

m3

L22

IC

MA

Group

IC

0402

TB5STB

15

TB

S

12

15

M1 M2

12 12

A1 B2

MA

The left table shows the number of transmission boost-

ers that is required by the system with three BC control­lers. For each BC controller that is subtracted from the
above-mentioned system, two additional indoor units
can be connected.

(3) Maximum allowable length

1) Indoor/outdoor transmission line
Maximum distance (1.25mm

L11+L12 200m [656ft]
L21+L22 200m [656ft]

2) Transmission line for centralized control
Maximum line distance via outdoor unit

(1.25mm

2

[AWG16] or larger)

L12+L31+L22 500m [1640ft]
L11+L31+L21 500m [1640ft]

3) MA remote controller wiring
Same as [5] 1.

MA

IC

05

TB5 TB15

S

M1 M2

2

[AWG16] or larger)

- 30 -

GBHWE0803A

[ II Restrictions ]

(4) Wiring method

1) Indoor/outdoor transmission line
Same as [5] 2.

Shielded cable connection

Same as [5] 2.

2) Transmission line for centralized control
Daisy-chain terminals M1 and M2 on the terminal block

for transmission line for centralized control (TB7) on the
outdoor units (OC) in different refrigerant circuits and on
the OC and OS in the same refrigerant circuit
If a power supply unit is not connected to the transmis­sion line for centralized control, replace the power jump­er connector on the control board from CN41 to CN40 on
only one of the outdoor units.

The outdoor units in the same refrigerant circuit are au­tomatically designated as OC and OS in the order of ca­pacity from large to small (if two or more units have the
same capacity, in the order of address from small to
large).

Only use shielded cables.

(5) Address setting method

Proce-

dures

1 Indoor

Unit or controller

Main unit IC 01 to 50

Address

setting

range

unit

Sub unit

2 LOSSNAY LC 01 to 50

3MA

remote
controller

Main
remote
controller

Sub
remote
controller

MA No set-

tings re­quired.

MA Sub

remote
controller

4 Outdoor unit OCOS51 to 100

5 Auxiliary

outdoor

BCcon­troller (Sub)

BS 51 to 100

unit

BC control­ler (Main)

BC OC (or OS if it exists) +1

Shielded cable connection

Daisy-chain the S terminal on the terminal block (TB7) on
the outdoor units (OC, OS) with the shield wire of the
shielded cable. Short-circuit the earth terminal ( ) and
the S terminal on the terminal block (TB7) on the outdoor
unit whose power jumper connector is mated with CN40.

3) MA remote controller wiring
Same as [5] 1.

When 2 remote controllers are connected to the sys­tem

Same as [5] 1.

Group operation of indoor units

Same as [5] 2.

4) LOSSNAY connection
Same as [5] 2.

5) Switch setting
Address setting is required as follows.

Setting method Notes

Assign the smallest address to the main

unit in the group.

In a system with a sub BC controller,

make the settings for the indoor units in
the following order.

(i) Indoor unit to be connected to the main

BC controller

(ii) Indoor unit to be connected to sub BC

controller 1

(iii) Indoor unit to be connected to sub BC

controller 2
Make the settings for the indoor units in
the way that the formula "(i) < (ii) < (iii)"
is true.

Assign sequential numbers starting with
the address of the main unit in the same
group +1. (Main unit address +1, main unit
address +2, main unit address +3, etc.)

Assign an arbitrary but unique address to
each of these units after assigning an ad­dress to all indoor units.

-Main

Settings to be made with the Sub/
Main switch

Assign sequential address to the out door

units in the same refrigerant circuit.

The outdoor units are automatically des-

ignated as OC and OS.(Note)

Assign an address that equals the sum of
the smallest address of the indoor units
that are connected to the sub BC controller
and 50.

Port number setting is

required

To perform a group op-

eration of indoor units
that feature different
functions, designate
the indoor unit in the
group with the greatest
number of functions as
the main unit.

None of these addresses may
overlap any of the indoor unit
addresses.

To set the address to 100,

set the rotary switches to 50.

If the addresses that is as-

signed to the main BC con­troller overlaps any of the
addresses that are assigned
to the outdoor units or to the
sub BC controller, use a dif­ferent, unused address with­in the setting range.

The use of a sub BC control-

ler requires the connection
of a main BC controller.

Fac-

tory
set­ting

00

00

00

The outdoor units in the same refrigerant circuit are automatically designated as OC and OS.
They are designated as OC and OS in the descending order of capacity (ascending order of address if the capacities are the
same).

HWE0803A GB

31- 31 -

[ II Restrictions ]

4. A system in which a system controller is connected to the transmission line for centralized control and which is pow­ered from an outdoor unit

(1) Sample control wiring

Interlock operation with

IC

12

the ventilation unit

15

IC

03

TB5STB

15

12

TB5

M1 M2

LC

07

S

L11

Leave the male
connector on
CN41 as it is.
SW2-1 OFF

OS

52

TB3

M1 M2 M1M2

CN41 CN40 Replace

SW2-1 OFF

OC

51

TB3

TB02

M1 M2

L12

BC

53

Group

IC

01

15

S

TB5STB

M1 M2

12

Group Group

02

TB5STB

M1 M2 M1M2

Not
Connect

L21

Not
Connect

TB7

M1 M2

S

Leave the male
connector on
CN41 as it is.
SW2-1 OFF

OC

55

TB3

M1 M2M1 M2

TB7

S

Connect

Not
Connect

L32

Note1

System controller

ABS

TB02

M1 M2

A1B

2

MA

L22

BC

Group

IC

57

TB5

M1 M2

TB

12

S

A1B

MA

S

TB5STB

15

m2 m1

2

m3

Note1 When only the LM adapter is connected,
leave SW2-1 to OFF (as it is).
Note2 LM adapters require the power supply
capacity of single-phase AC 220 - 240V.

A1B

2

MA

IC

Group

0504

15

12

IC

06

TB5STB

15

12

A1B

MA

2

A1B

2

MA

LC

08

TB5

S

M1 M2M1 M2M1 M2

TB7

M1 M2

S

Leave the male
connector on
CN41 as it is.
SW2-1 OFF

L31

OS

56

TB3

TB7

M1 M2 M1M2

S

(2) Cautions

1) M-NET remote controller and MA remote controller cannot both be
connected to the same group of indoor units.

2) No more than 2 MA remote controllers can be connected to a group
of indoor units.

3) Do not connect the terminal blocks (TB5) on the indoor units that are
connected to different outdoor units with each other.

4) Replacement of male power jumper connector (CN41) must be per­formed only on one of the outdoor units.

5) Short-circuit the shield terminal (S terminal) and the earth terminal (

) on the terminal block for transmission line for centralized control
(TB7) on the outdoor unit whose power jumper connector is mated
with CN40.

6) When the number of the connected indoor units is as shown in the
table below, one or more transmission boosters (sold separately)
are required.
To connect two transmission boosters, connect them in parallel.
(Observe the maximum number of connectable indoor units that are
listed in the specifications for each outdoor unit.)

Number of transmission booster
(sold separately) required

1 unit 2 units

When the P72 and P96 models are
not included in the connected in­door units

When the P72 and P96 models are
included in the connected indoor
units

27 - 50 units -

21 - 39 units 40 - 50 units

The left table shows the number of transmission boosters

that is required by the system with three BC controllers. For
each BC controller that is subtracted from the above-men­tioned system, two additional indoor units can be connected.

7) When a power supply unit is connected to the transmission
line for centralized control, leave the power jumper connec­tor on CN41 as it is (factory setting).

(3) Maximum allowable length

1) Indoor/outdoor transmission line
Same as [5] 3.

2) Transmission line for centralized control
Maximum line distance via outdoor unit

(1.25mm

2

[AWG16] or larger)
L32+L31+L12(L11) 500m [1640ft]
L32+L22(L21) 500m [1640ft]
L12(L11)+L31+L22(L21) 500m[1640ft]

3) MA remote controller wiring
Same as [5] 1.

- 32 -

GBHWE0803A

[ II Restrictions ]

(4) Wiring method

1) Indoor/outdoor transmission line
Same as [5] 2.
Only use shielded cables.

Shielded cable connection

Same as [5] 2.

2) Transmission line for centralized control

Daisy-chain terminals A and B on the system controller, ter­minals M1 and M2 on the terminal block for transmission line
for centralized control (TB7) on the outdoor units (OC) in dif­ferent refrigerant circuits and on the outdoor units (OC and
OS) in the same refrigerant circuit.
If a power supply unit is not connected to the transmission
line for centralized control, replace the power jumper con­nector on the control board from CN41 to CN40 on only one
of the outdoor units.
If a system controller is connected, set the central control
switch (SW2-1) on the control board of all outdoor units to
"ON."

The outdoor units in the same refrigerant circuit are au­tomatically designated as OC, OS1, and OS2 in the or­der of capacity from large to small (if two or more units
have the same capacity, in the order of address from
small to large).

Only use shielded cables.

Shielded cable connection

(5) Address setting method

Ad-

Proce-

dures

Unit or controller

dress

setting

range

1 Indoor

unit

Main unit IC 01 to

50

Sub unit

2 LOSSNAY LC 01 to

50

3MA

remote
controller

Main
remote con­troller

Sub
remote con­troller

4 Outdoor unit (Note) OC

No set-

MA

tings re­quired.

Sub

MA

remote
controller

51 to 100 Assign sequential address to the outdoor

OS

5 Auxiliary

outdoor

BCcon­troller (Sub)

51 to 100 Assign an address that equals the sum of the

BS

unit

BC control­ler (Main)

BC OC (or OS if it exists) +1

Daisy-chain the S terminal of the terminal block (TB7) on
the system controller, OC, and OS with the shield of the
shielded cable. Short-circuit the earth terminal ( ) and
the S terminal on the terminal block (TB7) on the outdoor
unit whose power jumper connector is mated with CN40.

3) MA remote controller wiring
Same as [5] 1.

When 2 remote controllers are connected to the sys­tem

Same as [5] 1.

Group operation of indoor units

Same as [5] 1.

4) LOSSNAY connection
Connect terminals M1 and M2 on the terminal block

(TB5) on the indoor unit (IC) to the appropriate terminals
on the terminal block for indoor-outdoor transmission line
(TB5) on LOSSNAY (LC). (Non-polarized two-wire)

Indoor units must be interlocked with the LOSSNAY unit

using the system controller. (Refer to the operation man­ual for the system controller for the setting method.) In­terlock setting from the remote controller is required if the
ON/OFF remote controller alone or the LM adapter alone
is connected.

5) Switch setting
Address setting is required as follows.

Setting method Notes

Assign the smallest address to the main unit

in the group.

In a system with a sub BC controller, make

the settings for the indoor units in the fol­lowing order.

(i) Indoor unit to be connected to the main BC

controller

(ii) Indoor unit to be connected to sub BC

controller 1

(iii) Indoor unit to be connected to sub BC

controller 2
Make the settings for the indoor units in the
way that the formula "(i) < (ii) < (iii)" is true.

Assign sequential numbers starting with the
address of the main unit in the same group
+1. (Main unit address +1, main unit address
+2, main unit address +3, etc.)

Assign an arbitrary but unique address to
each of these units after assigning an address
to all indoor units.

-

Settings to be made with the Sub/
Main switch

units in the same refrigerant circuit.

The outdoor units are automatically desig-

nated as OC and OS.(Note)

smallest address of the indoor units that are
connected to the sub BC controller and 50.

Port number setting is

required

To perform a group op-

eration of indoor units
that feature different
functions, designate
the indoor unit in the
group with the greatest
number of functions as
the main unit.

None of these addresses may
overlap any of the indoor unit
addresses.

Make the same indoor unit
group settings with the system
controller as the ones that
were made with the MA remote
controller.

To set the address to 100,

set the rotary switches to 50.

If the addresses that is as-

signed to the main BC con­troller overlaps any of the
addresses that are assigned
to the outdoor units or to the
sub BC controller, use a dif­ferent, unused address with­in the setting range.

The use of a sub BC control-

ler requires the connection
of a main BC controller.

Fac-

tory
set­ting

00

00

Main

00

The outdoor units in the same refrigerant circuit are automatically designated as OC and OS.
They are designated as OC and OS in the descending order of capacity (ascending order of address if the capacities are the
same).

HWE0803A GB

33- 33 -

[ II Restrictions ]

5. An example of a system in which a system controller is connected to the indoor-outdoor transmission line (except
LM adapter)

(1) Sample control wiring

Interlock operation with

IC

12

the ventilation unit

15

GroupGroupGroup

IC

03

TB5STB

M2M1 M2M1

15

12

TB5

LC

07

S

Leave the male
connector on
CN41 as it is.

SW2-1 OFF ON

OS

52

TB3

M2M1 M2M1

L11

CN41 CN40 Replace
SW2-1 OFF ON

51

TB3

L12

OC

BC

53

TB02

M2M1

IC

01

15

S

TB5STB

M2M1 M2M1

12

02

TB5STB

L21

Leave the male
connector on
CN41 as it is.

SW2-1 OFF ON

TB7

55

TB3

TB7

M2M1

OC

M2M1

M2M1

S

S

Not
Connect

Connect

L25

BC

57

TB02

M2M1

S

Note1

System controller

ABS

Group Group

L31

TB7

M2M1

Leave the male
connector on
CN41 as it is.

SW2-1 OFF ON

OS

56

TB3

M2M1

TB7

M2M1

S

Not
Connect

S

Not
Connect

(2) Cautions

1) M-NET remote controller and MA remote controller cannot both be
connected to the same group of indoor units.

2) No more than 2 MA remote controllers can be connected to a group
of indoor units.

3) Do not connect the terminal blocks (TB5) on the indoor units that are
connected to different outdoor units with each other.

4) Replacement of male power jumper connector (CN41) must be per­formed only on one of the outdoor units.

5) Provide grounding to S terminal on the terminal block for transmis­sion line for centralized control (TB7) on only one of the outdoor
units.

6) A maximum of 3 system controllers can be connected to the indoor­outdoor transmission line, with the exception that only one G(B)-50A
may be connected.

7) When the total number of indoor units exceeds 20 (12 if one or more
indoor units of the 72 model or above is connected), it may not be
possible to connect a system controller to the indoor-outdoor trans­mission line.

8) When the number of the connected indoor units is as shown in the
table below, one or more transmission boosters (sold separately)
are required.
To connect two transmission boosters, connect them in parallel.
(Observe the maximum number of connectable indoor units that are
listed in the specifications for each outdoor unit.)

TB5

A1B

2

MA

L22

IC

15

TB

S

12

A1B

MA

TB5STB

M2M1M2M1

m2 m1

2

m3

When the P72 and P96 models are not in­cluded in the connected indoor units

When the P72 and P96 models are includ­ed in the connected indoor units

The table above shows the number of transmission boosters that is

required by the system with three BC controllers. For each BC con­troller that is subtracted from the above-mentioned system, two ad­ditional indoor units can be connected.

A1B

2

MA

IC

0504

15

12

Note1 LM adapters cannot be connected to the
indoor-outdoor transmission line.

IC

06

TB5STB

M2M1

(3) Maximum allowable length

1) Indoor/outdoor transmission line
Maximum distance (1.25mm

L11+L12 200m [656ft]
L21+L22 200m [656ft]
L25 200m [656ft]

2) Transmission line for centralized control
Maximum line distance via outdoor unit

(1.25mm

2

[AWG16] or larger)
L25+L31+L12(L11) 500m [1640ft]
L12(L11)+L31+L22(L21) 500m [1640ft]

3) MA remote controller wiring
Same as [5] 1.

A1B

2

MA

LC

08

TB5

15

12

A1B

MA

S

M2M1

2

Number of transmission
booster (sold separately)
required

1 unit 2 units

27 - 50
units

21 - 39
units

2

[AWG16] or larger)

40 - 50
units

-

- 34 -

GBHWE0803A

[ II Restrictions ]

(4) Wiring method

1) Indoor/outdoor transmission line

Daisy-chain terminals M1 and M2 of the terminal block for indoor­outdoor transmission line (TB3) on the outdoor units (OC and OS),
of the terminal block for indoor-outdoor transmission line (TB02) on
the main and sub BC controllers (BC and BS), of the terminal block
for indoor-outdoor transmission line (TB5) on each indoor unit (IC),
and the S terminal of the system controller.(Non-polarized two-wire)

Only use shielded cables.

The outdoor units in the same refrigerant circuit are automatically
designated as OC and OS in the order of capacity from large to small
(if two or more units have the same capacity, in the order of address
from small to large).

Shielded cable connection

Daisy-chain the ground terminal ( ) on the outdoor units (OC and
OS), the S terminal of the terminal block (TB02) on the BC and BS,
and the S terminal of the terminal block (TB5) on the indoor unit (IC)
with the shield of the shielded cable.

2) Transmission line for centralized control

Daisy-chain terminals M1 and M2 on the terminal block for transmis­sion line for centralized control (TB7) on the outdoor units (OC) in
different refrigerant circuits and on the OC and OS in the same re­frigerant circuit.
If a power supply unit is not connected to the transmission line for
centralized control, replace the power jumper connector on the con­trol board from CN41 to CN40 on only one of the outdoor units.
Set the central control switch (SW2-1) on the control board of all out­door units to "ON."

(5) Address setting method

Ad-

Proce-

dures

Unit or controller

dress

setting

range

1 Indoor

unit

Main unit IC 01 to

50

Sub unit

2 LOSSNAY LC 01 to

50

3MA

remote
controller

Main
remote con­troller

Sub
remote con­troller

4 Outdoor unit OC

No set-

MA

tings re­quired.

Sub

MA

remote
controller

51 to 100 Assign sequential address to the outdoor

OS

5 Auxiliary

outdoor

BCcon­troller (Sub)

51 to 100 Assign an address that equals the sum of the

BS

unit

BC control­ler (Main)

BC OC (or OS if it exists) +1

Only use shielded cables.

Shielded cable connection

Daisy-chain the S terminal on the terminal block (TB7) on the out­door units (OC, OS) with the shield wire of the shielded cable. Short­circuit the earth terminal ( ) and the S terminal on the terminal
block (TB7) on the outdoor unit whose power jumper connector is
mated with CN40.

3) MA remote controller wiring
Same as [5] 1.

When 2 remote controllers are connected to the sys­tem

Same as [5] 1.

Group operation of indoor units

Same as [5] 1.

4) LOSSNAY connection

Connect terminals M1 and M2 on the terminal block (TB5) on the in­door units (IC) to the appropriate terminals on the terminal block for
indoor-outdoor transmission line (TB5) on LOSSNAY (LC). (Non-po­larized two-wire)

Indoor units must be interlocked with the LOSSNAY unit using the

system controller. (Refer to the operation manual for the system
controller for the setting method.) Interlock setting from the remote
controller is required if the ON/OFF remote controller alone is con­nected.

5) Switch setting
Address setting is required as follows.

Setting method Notes

Assign the smallest address to the main unit

in the group.

In a system with a sub BC controller, make

the settings for the indoor units in the fol­lowing order.

(i) Indoor unit to be connected to the main BC

controller

(ii) Indoor unit to be connected to sub BC

controller 1

(iii) Indoor unit to be connected to sub BC

controller 2
Make the settings for the indoor units in the
way that the formula "(i) < (ii) < (iii)" is true.

Assign sequential numbers starting with the
address of the main unit in the same group
+1. (Main unit address +1, main unit address
+2, main unit address +3, etc.)

Assign an arbitrary but unique address to
each of these units after assigning an address
to all indoor units.

-

Settings to be made with the Sub/
Main switch

units in the same refrigerant circuit.

The outdoor units are automatically desig-

nated as OC and OS.(Note)

smallest address of the indoor units that are
connected to the sub BC controller and 50.

Port number setting is

required

To perform a group op-

eration of indoor units
that feature different
functions, designate
the indoor unit in the
group with the greatest
number of functions as
the main unit.

None of these addresses may
overlap any of the indoor unit
addresses.

Make the same indoor unit
group settings with the system
controller as the ones that
were made with the MA remote
controller.

To set the address to 100,

set the rotary switches to 50.

If the addresses that is as-

signed to the main BC con­troller overlaps any of the
addresses that are assigned
to the outdoor units or to the
sub BC controller, use a dif­ferent, unused address with­in the setting range.

The use of a sub BC control-

ler requires the connection
of a main BC controller.

Fac-

tory
set­ting

00

00

Main

00

The outdoor units in the same refrigerant circuit are automatically designated as OC and OS.
They are designated as OC and OS in the descending order of capacity (ascending order of address if the capacities are the
same).

HWE0803A GB

35- 35 -

[ II Restrictions ]

6. An example of a system in which a system controller is connected to the indoor-outdoor transmission line (except
LM adapter)

(1) Sample control wiring

L31

L11

Leave the male
connector on
CN41 as it is.
SW2-1 OFF ON

M1M2

M1M2

Leave the male
connector on
CN41 as it is.
SW2-1 OFF ON

M1M2

M1M2 M1M2

OS1

52

TB3

TB7

OS1

55

TB3

TB7

S

S

CN41 CN40 Replace
SW2-1 OFF ON

Not
Connect

L21

Leave the male
connector on
CN41 as it is.
SW2-1 OFF ON

Not
Connect

L32

OC

BC

51

TB3

M1M2 M1M2

TB7

S

M1M2

Connect

OC

BC

54

TB3

M1M2

TB7

M1M2

S

Not
Connect

System
controller

ABS

L12

Group

IC

1 1 2 1 222 12

53 57

TB02

01

15

TB5STB

S

M1M2

12

M1M2 M1M2 M1M2 M1M2 M1M2 M1M2 M1M2 M1M2 M1M2

m2

A1 B2

MA

m3

Group Group Group

IC

02

TB5STB

12

15

TB5STB

BS

IC

04

57

15

TB02

12

A1 B2

MA

L22

IC

07

15

TB5STB

S

12

A1 B2

MA

Group Group Group

IC

1 1 2 1 1

56 59

TB5

TB02

S

Note1

TB

15

S

12

M1M2 M1M2

A1 B2

MA

*1 When only the LM adapter is connected, leave SW2-1 to OFF (as it is).

IC

0503

TB5STB

m1

12

A1 B2

IC

06

15

TB5STB

M1M2

MA

323 1

15

12

M1M2

TB02

BS

IC

09

15

TB5STB

S

12

M1M2

A1 B2

MA

Numbers in the square indicate port numbers.
Connection to BC controllers
Interlock operation with the ventilation unit

*2 LM adapters require the power supply capacity of single-phase AC 220 - 240V.

TB5STB

TB5STB

M1M2

12

LC

13

15

TB5

S

BS

IC

08

61

15

TB02

12

IC

10

TB5

15

12

M1M2

IC

12

11

15

TB5STB

S

LC

14

S

12

A1 B2

MA

IC

1 2

12

TB5STB

(2) Cautions

1) M-NET remote controller and MA remote controller cannot both be
connected to the same group of indoor units.

2) No more than 2 MA remote controllers can be connected to a group
of indoor units.

3) Do not connect the terminal blocks (TB5) on the indoor units that are
connected to different outdoor units with each other.

4) Replacement of male power jumper connector (CN41) must be per­formed only on one of the outdoor units.

5) Short-circuit the S (shield) terminal of the terminal block for the cen­tral control unit (TB7) and the ground terminal ( ) on the outdoor
unit whose power jumper was moved from CN41 to CN40.

6) When the number of the connected indoor units is as shown in the
table below, one or more transmission boosters (sold separately)
are required.
To connect two transmission boosters, connect them in parallel.
(Observe the maximum number of connectable indoor units that are
listed in the specifications for each outdoor unit.)

Number of transmission
booster (sold separately)
required

1 unit 2 units

When the P72 and P96 models are not in­cluded in the connected indoor units

When the P72 and P96 models are includ­ed in the connected indoor units

27 - 50
units

21 - 39
units

40 - 50
units

-

The table above shows the number of transmission boost-

ers that is required by the system with three BC controllers.
For each BC controller that is subtracted from the above­mentioned system, two additional indoor units can be con­nected.

7) When a power supply unit is connected to the transmission
line for centralized control, leave the power jumper connec­tor on CN41 as it is (factory setting).

(3) Maximum allowable length

1) Indoor/outdoor transmission line

2

Maximum distance (1.25mm

[AWG16] or larger)
L11+L12 200m [656ft]
L21+L22 200m [656ft]

2) Transmission line for centralized control
Maximum line distance via outdoor unit

(1.25mm

2

[AWG16] or larger)
L32+L31+L12(L11) 500m [1640ft]
L32+L22(L21) 500m [1640ft]
L12(L11)+L31+L22(L21) 500m[1640ft]

3) MA remote controller wiring
Maximum overall line length

(0.3 to 1.25mm

2

[AWG22 to 16])
m1 200m [656ft]
m2+m3 200m [656ft]

- 36 -

GBHWE0803A

[ II Restrictions ]

(4) Wiring method

1) Indoor/outdoor transmission line

Daisy-chain terminals M1 and M2 of the terminal block for indoor­outdoor transmission line (TB3) on the outdoor units (OC and OS),
of the terminal block for indoor-outdoor transmission line (TB02) on
the main and sub BC controllers (BC and BS), and of the terminal
block for indoor-outdoor transmission line (TB5) on each indoor unit
(IC). (Non-polarized two-wire)

Shielded cable connection

Daisy-chain the ground terminal ( ) on the outdoor units (OC and
OS), the S terminal of the terminal block (TB02) on the BC (BS), and
the S terminal of the terminal block (TB5) on the indoor unit (IC) with
the shield of the shielded cable.

The outdoor units in the same refrigerant circuit are auto­matically designated as OC, OS1, and OS2 in the order of
capacity from large to small (if two or more units have the
same capacity, in the order of address from small to large).

Only use shielded cables.

2) Transmission line for centralized control

Daisy-chain terminals A and B on the terminal block for transmission
line for centralized control (TB7) on the outdoor units (OC) in differ­ent refrigerant circuits and on the OC and OS in the same refrigerant
circuit.
If a power supply unit is not connected to the transmission line for
centralized control, replace the power jumper connector on the con­trol board from CN41 to CN40 on only one of the outdoor units.
Set the central control switch (SW2-1) on the control board of all out-

(5) Address setting method

Pro
ce­du­res

1 Indoor

Unit or controller

Main unit IC 01 to 50

Address

setting

range

unit

Sub unit

2 LOSSNAY LC 01 to 50

3MA

remote
controller

Main remote
controller

Sub remote
controller

4 Outdoor unit OC

No settings

MA

required.

Sub re-

MA

mote con­troller

51 to 100 The sum of the smallest address of the indoor units

OS

5 Auxiliary

outdoor
unit

BC
controller
(Sub)

BC control­ler (Main)

51 to 100 Assign an address that equals the sum of the smallest

BS

BC 51 to 100 OC (or OS if it exists) +1

door units to "ON."

Only use shielded cables.

Shielded cable connection

Daisy-chain the S terminal of the terminal block (TB7) on the system
controller, OC, and OS with the shield of the shielded cable. Short­circuit the earth terminal ( ) and the S terminal on the terminal
block (TB7) on the outdoor unit whose power jumper connector is
mated with CN40.

3) MA remote controller wiring
Same as [5] 1.

When 2 remote controllers are connected to the system

Same as [5] 1.

Group operation of indoor units

Same as [5] 1.

4) LOSSNAY connection

Connect terminals M1 and M2 on the terminal block (TB5) on the in­door unit (IC) to the appropriate terminals on the terminal block for
indoor-outdoor transmission line (TB5) on LOSSNAY (LC). (Non-po­larized two-wire)

Indoor units must be interlocked with the LOSSNAY unit us-

ing the system controller. (Refer to the operation manual for
the system controller for the setting method.) Interlock set­ting from the remote controller is required if the ON/OFF re­mote controller alone or the LM adapter alone is connected.

5) Switch setting
Address setting is required as follows.

Setting method Notes

Assign the smallest address to the main unit in the

group.

In a system with a sub BC controller, make the set-

tings for the indoor units in the following order.

(i) Indoor unit to be connected to the main BC con-

troller
(ii) Indoor unit to be connected to sub BC controller 1
(iii) Indoor unit to be connected to sub BC controller 2

Make the settings for the indoor units in the way
that the formula "(i) < (ii) < (iii)" is true.

Assign sequential numbers starting with the address
of the main unit in the same group +1. (Main unit ad­dress +1, main unit address +2, main unit address +3,
etc.)

Assign an arbitrary but unique address to each of
these units after assigning an address to all indoor
units.

-

Settings to be made with the Sub/Main switch

in the same system and 50.

Assign sequential address to the outdoor units in

the same refrigerant circuit.

The outdoor units are automatically designated as

OC and OS.(Note)

address of the indoor units that are connected to the
sub BC controller and 50.

Port number setting is

required

To perform a group op-

eration of indoor units
that feature different
functions, designate
the indoor unit in the
group with the greatest
number of functions as
the main unit.

None of these addresses may
overlap any of the indoor unit
addresses.

Make the same indoor unit
group settings with the system
controller as the ones that
were made with the MA remote
controller.

To set the address to 100,

set the rotary switches to 50.

To set the address to 100,

set the rotary switches to 50.

If the addresses that is as-

signed to the main BC con­troller overlaps any of the
addresses that are assigne d
to the outdoor units or to the
sub BC controller, use a dif­ferent, unused address with­in the setting range.

The use of a sub BC control-

ler requires the connection
of a main BC controller.

Fact

ory
set­ting

00

00

Mai

n

00

00

The outdoor units in the same refrigerant circuit are automatically designated as OC and OS.
They are designated as OC and OS in the descending order of capacity (ascending order of address if the capacities are the same).

HWE0803A GB

37- 37 -

[ II Restrictions ]

[6] An Example of a System to which an M-NET Remote Controller is connected

(1) Sample control wiring

L11

Not
Connect

L21

Not
Connect

CN41 CN40 Replace
SW2-1 OFF ON

OC

51

TB3

TB7

M1 M2

S

Leave the male
connector on
CN41 as it is.

SW2-1 OFF ON

OC

55

TB3

TB7

S

System controller

ABS

Connect

Not
Connect

L32

Note1

Group

IC

01

Group

TB5STB

M1M2

A1 B2

101
RC

S

TB02

M1M2

BC

53

BC

57

TB02

M1M2

S

m3

A1 B2

154

RC

*1 When only the LM adapter is connected, leave SW2-1 to OFF (as it is).
*2 LM adapters require the power supply capacity of single-phase AC 220 - 240V.

Leave the male
connector on
CN41 as it is.

SW2-1 OFF ON

OS

52

TB3

M1M2 M1M2

TB7

M1M2

S

Leave the male
connector on
CN41 as it is.

L31

SW2-1 OFF ON

OS

56

TB3

M1M2 M1M2

TB7

M1M2 M1M2

S

L12

Group Group

02

15

12

m1

L22

TB5STB

M1M2

A1 B2

102

RC

IC

0504

TB5

M1M2 M1M2 M1M2 M1 M2

A1 B2

104

RC

TB5STB

15

TB

12

S

m2

Interlock operation with the ventilation unit

IC

IC

03

15

12

IC

Group

TB5STB

A1 B2

103

RC

IC

06

15

12

TB5STB

A1 B2

106

RC

15

12

15

12

TB5

LC

07

TB5

S

M1M2M1M2

LC

08

S

(2) Cautions

1) M-NET remote controller and MA remote controller cannot
both be connected to the same group of indoor units.

2) No more than 3 M-NET remote controllers can be connected
to a group of indoor units.

3) Do not connect the terminal blocks (TB5) on the indoor units
that are connected to different outdoor units with each other.

4) Replace the power jumper connector of the control board
from CN41 to CN40 on only one of the outdoor units.

5) Provide an electrical path to ground for the S terminal on the
terminal block for centralized control on only one of the out­door units.

6) When the number of the connected indoor units is as shown
in the table below, one or more transmission boosters (sold
separately) are required.
To connect two transmission boosters, connect them in par­allel. (Observe the maximum number of connectable indoor
units that are listed in the specifications for each outdoor
unit.)

Number of transmission booster
(sold separately) required

1 unit 2 units 3 units

When the P72 and P96 models
are not included in the connected
indoor units

When the P72 and P96 models
are included in the connected in­door units

15 - 34
units

11 - 26
units

35 - 50

units

27 - 42
units

-

43 - 50
units

The left table shows the number of transmission boosters

that is required by the system with three BC controllers. For
each BC controller that is subtracted from the above-men­tioned system, two additional indoor units can be connected.

7) When a power supply unit is connected to the transmission
line for centralized control, leave the power jumper connec­tor on CN41 as it is (factory setting).

(3) Maximum allowable length

1) Indoor/outdoor transmission line
Same as [5] 3.

2) Transmission line for centralized control
Same as [5] 4.

3) M-NET remote controller wiring
Maximum overall line length

(0.3 to 1.25mm

2

[AWG22 to 16])
m1 10m [32ft]
m2+m3 10m [32ft]
If the standard-supplied cable must be extended, use a
cable with a diameter of 1.25mm

2

[AWG16]. The section
of the cable that exceeds 10m [32ft] must be included in
the maximum indoor-outdoor transmission line distance
described in (1).
When connected to the terminal block on the Simple re­mote controller, use cables that meet the following cable
size specifications: 0.75 - 1.25 mm

2

[AWG18-16].

- 38 -

GBHWE0803A

[ II Restrictions ]

(4) Wiring method

1) Indoor/outdoor transmission line
Same as [5] 3.

Shielded cable connection

Same as [5] 1.

2) Transmission line for centralized control
Same as [5] 4.

Shielded cable connection

Same as [5] 4.

3) M-NET remote controller wiring
M-NET remote controller is connectable anywhere on

the indoor-outdoor transmission line.

(5) Address setting method

Ad-

Proce-

dures

Unit or controller

dress

setting

range

1 Indoor

unit

Main unit IC 01 to

50

Sub unit

2 LOSSNAY LC 01 to

50

3 M-NET

remote
controller

Main
remote con­troller

Sub
remote con­troller

4 Outdoor unit OC

RC 101 to

150

RC 151 to

200

51 to 100 Assign sequential address to the outdoor

OS

5 Auxiliary

outdoor

BCcon­troller (Sub)

51 to 100 Assign an address that equals the sum of the

BS

unit

BC control­ler (Main)

BC OC (or OS if it exists) +1

When 2 remote controllers are connected to the sys­tem

Refer to the section on Switch Setting.

Performing a group operation (including the group
operation of units in different refrigerant circuits).

Refer to the section on Switch Setting.

4) LOSSNAY connection
Same as [5] 4.

5) Switch setting
Address setting is required as follows.

Setting method Notes

Assign the smallest address to the main unit

in the group.

In a system with a sub BC controller, make

the settings for the indoor units in the fol­lowing order.

(i) Indoor unit to be connected to the main BC

controller

(ii) Indoor unit to be connected to sub BC

controller 1

(iii) Indoor unit to be connected to sub BC

controller 2
Make the settings for the indoor units in the
way that the formula "(i) < (ii) < (iii)" is true.

Assign sequential numbers starting with the
address of the main unit in the same group
+1. (Main unit address +1, main unit address
+2, main unit address +3, etc.)

Assign an arbitrary but unique address to
each of these units after assigning an address
to all indoor units.

Add 100 to the main unit address in
the group

Add 150 to the main unit address in
the group

units in the same refrigerant circuit.

The outdoor units are automatically desig-

nated as OC and OS.(Note)

smallest address of the indoor units that are
connected to the sub BC controller and 50.

Port number setting is

required

To perform a group op-

eration of indoor units
that have different func­tions, set the indoor unit
in the group with the
greatest number of
functions as the main
unit.

None of these addresses may
overlap any of the indoor unit
addresses.

It is not necessary to set the

100s digit.

To set the address to 200,

set the rotary switches to 00.

To set the address to 100,

set the rotary switches to 50.

If the addresses that is as-

signed to the main BC con­troller overlaps any of the
addresses that are assigned
to the outdoor units or to the
sub BC controller, use a dif­ferent, unused address with­in the setting range.

The use of a sub BC control-

ler requires the connection
of a main BC controller.

Fac-

tory
set­ting

00

00

101

00

The outdoor units in the same refrigerant circuit are automatically designated as OC and OS.
They are designated as OC and OS in the descending order of capacity (ascending order of address if the capacities are the
same).

HWE0803A GB

39- 39 -

[ II Restrictions ]

[7] An Example of a System to which both MA Remote Controller and M-NET Remote Controller are connected

(1) Sample control wiring

L12

Group Group

IC

01

TB5STB

15

M1M2 M1M2 M1M2

12

IC

02

TB5STB

15

12

IC

06

TB5STB

15

12

Leave the male
connector on
CN41 as it is.

SW2-1 OFF ON

OS

52

TB3

M1M2

L11

CN41 CN40 Replace
SW2-1 OFF ON

M1M2

51

TB3

OC

BC

53

TB02

M1M2

S

TB7

M1M2

S

Not
Connect

Leave the male
connector on
CN41 as it is.

L31

SW2-1 OFF ON

OS

55

TB3

TB7

S

Not
Connect

L21

TB7

M1M2

S

Leave the male
connector on
CN41 as it is.

SW2-1 OFF ON

OC

54

TB3

TB7

S

M1 M2M1 M2

Connect

Not
Connect

L32

Note1

System controller

ABS

M1 M2M1 M2M1 M2

BC

56

TB02

S

(2) Cautions

1) Be sure to connect a system controller.

2) M-NET remote controller and MA remote controller cannot both be
connected to the same group of indoor units.

3) Assign to the indoor units connected to the MA remote controller ad­dresses that are smaller than those of the indoor units that are con­nected to the M-NET remote controller.

4) No more than 2 M-NET remote controllers can be connected to a
group of indoor units.

5) No more than 2 MA remote controllers can be connected to a group
of indoor units.

6) Do not connect the terminal blocks (TB5) on the indoor units that are
connected to different outdoor units with each other.

7) Replace the power jumper connector of the control board from CN41
to CN40 on only one of the outdoor units.

8) Provide an electrical path to grou nd for the S terminal on the terminal
block for centralized control on only one of the outdoor units.

9) When the number of the connected indoor units is as shown in the
table below, one or more transmission boosters (sold separately)
are required.
To connect two transmission boosters, connect them in parallel.
(Observe the maximum number of connectable indoor units that are
listed in the specifications for each outdoor unit.)

Number of transmission booster
(sold separately) required

1 unit 2 units 3 units

When the P72 and P96 models
are not included in the connected
indoor units

When the P72and P96 models
are included in the connected in­door units

15 - 34
units

11 - 26
units

35 - 50

units

27 - 42
units

-

43 - 50
units

A1 B2

A1 B2

106

MA

L22

IC

GroupGroup

IC

0403

TB5

TB

15

12

S

A1 B2

MA

*1 When only the LM adapter is connected, leave SW2-1 to OFF (as it is).
*2 LM adapters require the power supply capacity of single-phase AC 220 - 240V.

TB5STB

A1 B2

104

RC

15

12

TB5STB

M1M2M1M2M1M2

RC

IC

05

15

12

The left table shows the number of transmission boost-

ers that is required by the system with three BC control­lers. For each BC controller that is subtracted from the
above-mentioned system, two additional indoor units
can be connected.

10) When a power supply unit is connected to the transmis­sion line for centralized control, leave the power jumper
connector on CN41 as it is (factory setting).

(3) Maximum allowable length

1) Indoor/outdoor transmission line
Same as [5] 3.

2) Transmission line for centralized control
Same as [5] 4.

3) MA remote controller wiring
Same as [5] 1.

4) M-NET remote controller wiring
Same as [6]

- 40 -

GBHWE0803A

[ II Restrictions ]

(4) Wiring method

1) Indoor/outdoor transmission line
Same as [5] 3.

Shielded cable connection

Same as [5] 1.

2) Transmission line for centralized control
Same as [5] 4.

Shielded cable connection

Same as [5] 4.

3) MA remote controller wiring

When 2 remote controllers are connected to the sys­tem

Group operation of indoor units

Same as [5] 1.

4) M-NET remote controller wiring

When 2 remote controllers are connected to the sys­tem

Group operation of indoor units

Same as [6]

5) LOSSNAY connection
Same as [5] 4.

6) Switch setting
Address setting is required as follows.

HWE0803A GB

41- 41 -

[ II Restrictions ]

(5) Address setting method

Pro-

ce-

dure

Unit or controller

s

1 Opera-

tion with
the

In­door
unit

Main
unit

IC 01 to

50

MA re­mote
controller

2 Opera-

tion with
the
M-NET
remote

MA
re­mote
con­troller

In­door
unit

Sub
unit

Main re­mote
control­ler

Sub
remote
control­ler

Main
unit

Sub
unit

IC 01 to

50

No

MA

set­tings re­quired.

Sub

MA

remote
control­ler

IC 01 to 50Assign the smallest address

IC 01 to

50

controller

M­NET
re­mote
con­troller

Main re­mote
control­ler

Sub
remote
control­ler

RC 101 to

150

RC 151 to

200

3 LOSSNAY LC 01 to

50

4 Outdoor unit OCOS51 to

100

5 Auxiliary

outdoor

BCcontroller (Sub)

BS 51 to

100

unit

BC controller
(Main)

BC OC (or OS if it exists) +1

Ad-

dress

set-

ting

range

Setting method Notes

Assign the smallest address to

the main unit in the group.

In a system with a sub BC con-

troller, make the settings for the
indoor units in the following or­der.

(i) Indoor unit to be connected to

the main BC controller

(ii) Indoor unit to be connected to

sub BC controller 1

(iii) Indoor unit to be connected to

sub BC controller 2
Make the settings for the indoor
units in the way that the formula "(i)
< (ii) < (iii)" is true.

Assign sequential numbers start­ing with the address of the main
unit in the same group +1. (Main
unit address +1, main unit address
+2, main unit address +3, etc.)

Assign an address smaller than that of

the indoor unit that is connected to the
M-NET remote controller.

Enter the same indoor unit group set-

tings on the system controller as the
ones that were entered on the MA re­mote controller.

To perform a group operation of indoor

units that have different functions, des­ignate the indoor unit in the group with
the greatest number of

Port number setting is required

-

Settings to be made according
to the remote controller func­tion selection

Assign an address higher than those of

to the main unit in the group.

Assign sequential numbers
starting with the address of the
main unit in the same group
+1. (Main unit address +1,
main unit address +2, main
unit address +3, etc.)

Add 100 to the main unit ad­dress in the group.

the indoor units that are connected to
the MA remote controller.

Make the initial settings for the indoor

unit group settings via the system con­troller.

To perform a group operation of indoor

units that have different functions, des­ignate the indoor unit in the group with
the greatest number of functions as the
main unit.

Port number setting is required.
Addresses that are assigned to the in-

door units that are connected to t he sub
BC controller should be higher than the
addresses that are assigned to the in­door units that are connected to the
main BC controller.

It is not necessary to set the 100s

digit.

To set the address to 200, set it to

00.

Add 150 to the main unit ad­dress in the group.

Assign an arbitrary but unique
address to each of these units

None of these addresses may over-

lap any of the indoor unit addresses.
after assigning an address to
all indoor units.

Assign sequential address to the

outdoor units in the same refrig­erant circuit.

The outdoor units are automati-

cally designated as OC and
OS.(Note)

Assign an address that equals the
sum of the smallest address of the
indoor units that are connected to
the sub BC controller and 50.

To set the address to 100, set it to 50.
If the addresses that is assigned to the

main BC controller overlaps any of the
addresses that are assigned to the out­door units or to the sub BC controller,
use a different, unused address within
the setting range.

The use of a sub BC controller requires

the connection of a main BC controller.

Facto­ry set-

ting

00

Main

00

101

00

00

The outdoor units in the same refrigerant circuit are automatically designated as OC and OS.
They are designated as OC and OS in the descending order of capacity (ascending order of address if the capacities are the same).

- 42 -

GBHWE0803A

[ II Restrictions ]

[8] Restrictions on Pipe Length

(1) System that requires 16 BC controller ports or fewer <System with only the main BC controller or standard BC con-

troller>

Outdoor unit

*Use a main BC controller when connecting the outdoor units of
P144 model or above.

Branch joint
(CMY-Y102S-G2)

b

B

c

Maximum of 3 units per port
Total capacity of P54 or below

Indoor

d

h2

HH'

h1

Reducer (P06 - P18 models)
(Supplied with the BC Controller)

a

Indoor Indoor Indoor

(P06 - P54 models) (P72 or P96 models)

A

BC controller

Junction pipe
(CMY-R160-J)

Unit: m [ft]

Operation Pipe sections Allowable length of pipes

Length Total pipe length A+B+a+b+c+d Refer to the restrictions on the total piping

length in the graph on the next page.

Total pipe length from the outdoor unit
to the farthest indoor unit

Between outdoor unit and BC control-

A+B+d 165 [541] or less

(Equivalent length 190 [623] or less)

A 110 [360] or less

ler

*1

Height
difference

Between BC controller and indoor unit B+d 40 [131] or less

Between indoor
and outdoor units

Outdoor unit
above indoor unit

Outdoor unit be-

H 50 [164] or less

H' 40 [131] or less

low indoor unit

Between indoor unit and BC controller h1 15[49](10[32]) or less

Between indoor units h2 15[49](10[32]) or less

*2

*2

*1. When the overall pipe length between the BC controller and the farthest indoor unit exceeds 40m [131ft], observe the

restrictions in the figure titled "Restrictions on pipe length" below. (Except the P96 models)

*2. When the capacity of the connected indoor units is P72 or above, use the figures in the parentheses as a reference.

1) To connect the P72 or P96 models of indoor units, use an optional junction pipe kit (Model: CMY-R160-J).

2) Do not connect the P72 or P96 models of indoor units and other models of indoor units at the same port.

3) Note the following when connecting multiple indoor units to a single port.

Those indoor units connected to the same port must be installed in the same room.
Set the indoor temperature via the connected remote controller, and when connecting multiple remote controllers, configure

these controllers as a group by making appropriate settings. These indoor units can only be operated in the same mode.

HWE0803A GB

- 43 -

[ II Restrictions ]

Restrictions on pipe length [PURY-P72, P96THMU-A, PURY-P72, P96YHMU-A]

1000

[3280]

900

[2952]

800

[2624]

700

[2296]

600

[1968]

500

[1640]

400

[1312]

300

[984]

Aggregate length of all pipes(m[ft])

200

[656]

10 20 30 40 50 60 70 80 90

[32] [64] [98] [131] [164] [196] [229] [262] [295] [328] [360]

Pipe length between outdoor unit and BC controller (m[ft])

100 110

The height difference and the pipe length between BC controller and indoor units

70

[229]

60

[196]

50

[164]

40

[131]

30

[98]

20

[64]

Pipe length between main BC

10

controller and farthest indoor unit (m[ft])

[32]

0

0 5 10 15

Height difference between main BC controller and farthest indoor unit (m[ft])

[16] [32] [49]

HWE0803A GB

- 44 -

[ II Restrictions ]

(2) System that requires more than 16 BC controller ports or with multiple BC controllers <Outdoor unit P120 model or

below.>

Outdoor unit

HH'

h1

BC controller (main)

Reducer (P06 - P18 models)
(Supplied with the BC Controller)

Junction pipe

a

(CMY-R160-J)

Indoor Indoor Indoor Indoor

(P06 - P54 models) (P72 or P96 models)

Branch joint
(CMY-Y202-G2)

A

b

(CMY-Y102L-G2)
(CMY-Y102S-G2)

C

Branch joint
(

CMY-Y102S-G2)

B

c

Maximum of 3 units per port
Total capacity of P54 or below

d

BC controller (sub)

D

BC controller (sub)

E

Indoor

e

Indoor

h1

h3

h2

h1

f

Unit: m [ft]

Operation Pipe sections Allowable length of pipes

Length Total pipe length A+B+C+D+E+a+b+c+d+e+f Refer to the restrictions on the total pip-

ing length in the graphon the next page.

Total pipe length from the out­door unit to the farthest indoor

A+C+E+f 165 [541] or less

(Equivalent length 190 [623] or less)

unit

Between outdoor unit and BC

A 110 [360] or less

controller

*1

Height
differ­ence

Between BC controller and in­door unit

Outdoor unit
above in-

Between indoor
and outdoor
units

door unit

Outdoor unit

B+d or C+D+e

40 [131] or less

or C+E+f

H 50 [164] or less

H' 40 [131] or less
below in­door unit

Between indoor unit and BC

h1 15 [49](10[32]) or less

*2

controller

Between indoor units h2 15 [49](10[32]) or less

*2

Between the BC controller
(main or sub) and the sub BC

h3 15 [49] or less

controller

*1. When the overall pipe length between the BC controller and the farthest indoor unit exceeds 40m [131ft], observe the

restrictions in the figure titled "Restrictions on pipe length" below. (Except the P96 models)

*2. When the capacity of the connected indoor units is P72 or above, use the figures in the parentheses as a reference.

HWE0803A GB

- 45 -

[ II Restrictions ]

1) A system that requires more than 16 BC controller ports requires two or three BC controllers (main and sub), and three pipes
will be used between the main and the sub BC controllers.

2) When connecting two sub BC controllers, observe the maximum allowable length in the table above.

3) When connecting two sub BC controllers, install them in parallel.

4) To connect the P36 through P54 models of indoor units, use an optional junction pipe kit (Model: CMY-R160-J) and merge
the two ports before connecting them. (In that case, set DIP SW4-6 on the BC controller to ON.)
It is also possible to connect the P36 through P54 models of units to a port, although the cooling performance will somewhat
decrease. (In that case, set DIP SW4-6 on the BC controller to OFF.)
(The factory setting for DIP SW4-6 is OFF. )

5) Do not connect the P72 or P96 models of indoor units and other models of indoor units at the same port.

6) Note the following when connecting multiple indoor units to a single port.

Those indoor units connected to the same port must be installed in the same room.
Set the indoor temperature via the connected remote controller, and when connecting multiple remote controllers, configure

these controllers as a group by making appropriate settings. These indoor units can only be operated in the same mode.

7) The maximum capacity of the indoor units that is connectable to the CMB-P-NU-GB types of sub BC controllers is P126 or
below (when two GB type controllers are connected P126 or below for both combined).
The maximum total capacity of indoor units that is connectable to the sub BC controller CMB-P1016NU-HB is P126 or below.
If at least one CMB-P1016NU-HB unit is connected, the maximum total capacity of connectable indoor units to a system with
two sub controllers is P168 or below.

Restrictions on pipe length [PURY-P120THMU-A, PURY-P120YHMU-A]

1000

[3280]

900

[2952]

800

[2624]

700

[2296]

600

[1968]

500

[1640]

400

[1312]

300

[984]

Aggregate length of all pipes(m[ft])

200

[656]

10 20 30 40 50 60 70 80 90

[32] [64] [98] [131] [164] [196] [229] [262] [295] [328] [360]

Pipe length between outdoor unit and BC controller (m[ft])

100 110

The height difference and the pipe length between BC controller and indoor units

70

[229]

60

[196]

50

[164]

40

[131]

30

[98]

20

[64]

Pipe length between main BC

10

controller and farthest indoor unit (m[ft])

[32]

0

0 5 10 15

Height difference between main BC controller and farthest indoor unit (m[ft])

[16] [32] [49]

HWE0803A GB

- 46 -

[ II Restrictions ]

(3) System that requires more than 16 BC controller ports or with multiple BC controllers <Outdoor unit P144 model or

above.>

Branch joint (CMY-R100VBK)
The distributor on the low-pressure side must be placed in the outdoor unit that has a larger capacity

2

index of the two, regardless of the relative positions of the outdoor units or their addresses.
If the distributor is placed in the outdoor unit that has a smaller capacity, refrigerant will not be properly
distributed and compressor failure may result.
(If outdoor units that have the same capacity are used in combination, the distributor can be placed in
either outdoor unit.)

Branch joint
(CMY-Y202-G2)
(CMY-Y102L-G2)

A

BC controller (main)

Junction pipe

a

(CMY-R160-J)

Indoor Indoor Indoor Indoor

b

C

B

(CMY-Y102S-G2)

Branch joint
(

CMY-Y102S-G2)

cd

Maximum of 3 units per port
Total capacity of P54 or below

D

E

BC controller (sub)

BC controller (sub)

Indoor

e

Indoor

h1

h3

h2

f

h1

h4

HH'

Outdoor unit

1

Outdoor unit

F

Reducer (P06 - P18 models)
(Supplied with the BC Controller)

h1

G

(P06 - P54 models) (P72 - P96 models)

Unit: m [ft]

Operation Pipe sections Allowable length of pipes

Length Total pipe length F+G+A+B+C+D+E+a+b+c+d+e+fRefer to the restrictions on the total pip-

ing length in the graph on the next page.

Total pipe length from the out­door unit to the farthest indoor

F(G)+A+C+E+f 165 [541] or less

(Equivalent length 190 [623] or less)

unit

Between outdoor unit and BC

F(G)+A 110 [360] or less

controller

Between BC controller and in­door unit

B+d or C+D+e

or C+E+f

40 [131] or less

*1

Between indoor units F+G 5 [16] or less

Height
differ­ence

Between indoor

Outdoor unit
above in­door unit

H 50 [164] or less

and outdoor
units

Outdoor unit
below in-

H' 40 [131] or less

door unit

Between indoor unit and BC

h1 15 [49](10[32]) or less

*2

controller

Between indoor units h2 15 [49](10[32]) or less

*2

Between the BC controller
(main or sub) and the sub BC

h3 15 [49] or less

controller

Between outdoor units h4 0.1 [0.3] or less

*1. When the overall pipe length between the BC controller and the farthest indoor unit exceeds 40m [131ft], observe

the restrictions in the figure titled "Restrictions on pipe length" below. (Except the P96 models)

*2. When the capacity of the connected indoor units is P72 or above, use the figures in the parentheses as a reference.

HWE0803A GB

- 47 -

[ II Restrictions ]

1) A system that requires more than 16 BC controller ports requires two or three BC controllers (main and sub), and three pipes
will be used between the main and the sub BC controllers.

2) When connecting two sub BC controllers, observe the maximum allowable length in the table above.

3) When connecting two sub BC controllers, install them in parallel.

4) To connect the P36 through P54 models of indoor units, use an optional junction pipe kit (Model: CMY-R160-J) and merge
the two ports before connecting them. (In that case, set DIP SW4-6 on the BC controller to ON.)
It is also possible to connect the P36 through P54 models of units to a port, although the cooling performance will somewhat
decrease. (In that case, set DIP SW4-6 on the BC controller to OFF.)
(The factory setting for DIP SW4-6 is OFF.)

5) Do not connect the P72 or P96 models of indoor units and other models of indoor units at the same port.

6) Note the following when connecting multiple indoor units to a single port.

Those indoor units connected to the same port must be installed in the same room.
Set the indoor temperature via the connected remote controller, and when connecting multiple remote controllers, configure

these controllers as a group by making appropriate settings. These indoor units can only be operated in the same mode.

7) The maximum capacity of the indoor units that is connectable to the CMB-P-NU-GB types of sub BC controllers is P126 or
below (when two GB type controllers are connected P126 or below for both combined) .
The maximum total capacity of indoor units that is connectable to the sub BC controller CMB-P1016NU-HB is P126 or below.
If at least one CMB-P1016NU-HB unit is connected, the maximum total capacity of connectable indoor units to a system with
two sub controllers is P168 or below.

HWE0803A GB

- 48 -

[ II Restrictions ]

Restrictions on pipe length

[PURY-P144, P168TSHMU-A]
[PURY-P144, P168YSHMU-A]

[PURY-P216, P240TSHMU-A]
[PURY-P216, P240YSHMU-A]

1000

[3280]

900

[2952]

800

[2624]

700

[2296]

600

[1968]

500

[1640]

400

[1312]

300

[984]

Aggregate length of all pipes(m[ft])

200

[656]

10 20 30 40 50 60 70 80 90

[32] [64] [98] [131] [164] [196] [229] [262] [295] [328] [360]

Pipe length between outdoor unit and BC controller (m[ft])

1000

[3280]

900

[2952]

800

[2624]

700

[2296]

600

[1968]

500

[1640]

400

[1312]

300

[984]

Aggregate length of all pipes(m[ft])

200

[656]

10 20 30 40 50 60 70 80 90

[32] [64] [98] [131] [164] [196] [229] [262] [295] [328] [360]

Pipe length between outdoor unit and BC controller (m[ft])

100

100

[PURY-P192TSHMU-A]
[PURY-P192YSHMU-A]

110

110

1000

[3280]

900

[2952]

800

[2624]

700

[2296]

600

[1968]

500

[1640]

400

[1312]

300

[984]

Aggregate length of all pipes(m[ft])

200

[656]

10 20 30 40 50 60 70 80 90

[32] [64] [98] [131] [164] [196] [229] [262] [295] [328] [360]

Pipe length between outdoor unit and BC controller (m[ft])

100

110

The height difference and the pipe length between BC controller and indoor units

70

[229]

60

[196]

50

[164]

40

[131]

30

[98]

20

[64]

Pipe length between main BC

10

controller and farthest indoor unit (m[ft])

[32]

0

0 5 10 15

Height difference between main BC controller and farthest indoor unit (m[ft])

[16] [32] [49]

HWE0803A GB

- 49 -

[ II Restrictions ]

1. Refrigerant pipe size

(1) Between outdoor unit and the first twinning pipe (Part A)

Refrigerant pipe size Connection to outdoor unit and BC controller

Outdoor units

Low-pressure pipe High-pressure pipe Low-pressure pipe High-pressure pipe

72 ø19.05 [3/4"] ø15.88 [5/8"] ø19.05 [3/4"] ø15.88 [5/8"]

96 ø22.2 [7/8"]

120

ø19.05 [3/4"]

144

ø22.2[7/8"] ø22.2 [7/8"]168

192

216

ø28.58 [1-1/8"] ø28.58 [1-1/8"]

ø28.58 [1-1/8"] ø28.58 [1-1/8"]

240

(2) Between BC controller and indoor unit (Sections a, b, c, d, e, and f )

Refrigerant pipe size Indoor unit connection

Indoor unit

Liquid pipe Gas pipe Liquid pipe Gas pipe

P06, P08, P12, P15, P18 ø6.35 [1/4"] ø12.7 [1/2"] ø6.35 [1/4"] ø12.7 [1/2"]

P24, P27, P30

P36, P48, P54

P72

P96 ø22.2

ø9.52 [3/8"] ø15.88 [5/8"] ø9.52 [3/8"] ø15.88 [5/8"]

ø19.05 [3/4"]

ø12.7 [1/2"]

[7/8"]

Unit : mm [inch]

ø22.2 [7/8"]

ø19.05 [3/4"]

Unit : mm [inch]

(Flare connection for all models)

ø19.05 [3/4"]

ø12.7 [1/2"]

ø22.2

[7/8"]

(3) Between the main and sub BC controllers (Section C)

Unit : mm [inch]

Refrigerant pipe size (Brazed connection on all models )

Indoor unit

Liquid pipe High-pressure gas pipe Low-pressure gas pipe

- P72

P73 - P108

ø9.52 [3/8"]

ø15.88 [5/8"] ø19.05 [3/4"]

ø22.2 [7/8"]

ø19.05 [3/4"]

P109 - P126

ø12.7 [1/2"]

ø28.58 [1-1/8"]P127 - P144

P145 - P168 ø15.88 [5/8"]

ø22.2 [7/8"]

Select the proper size pipes for the main unit based on the total capacity of the indoor units that are connected to both sub
BC controllers. Select the proper size pipes for the sub controller side based on the total capacity of the indoor units that are
connected to the sub controller.

HWE0803A GB

- 50 -

[ II Restrictions ]

2. Connecting the BC controller

(1) Size of the pipe that fits the standard BC controller ports

P72 - P120 models

Connection: Brazed connection

To outdoor unit

*1
Reducer
(Standard
supplied parts)

P18 model or below

P24 - P54 models P72 or P96 models

The ports of the BC controller accommodates the pipes on P24 - P54 models of indoor units.
To connect other types of indoor units, follow the procedure below.

BC controller

IndoorIndoor

*2

Junction pipe kit
(Model name:
CMY-R160-J)
(Optional accessory)

Indoor

Operation

Outdoor unit side PURY-P72THMU-A

PURY-P72YHMU-A

PURY-P96THMU-A
PURY-P96YHMU-A

PURY-P120THMU-A
PURY-P120YHMU-A

Indoor unit side ø9.52 [3/8"] (Flare connection)

Branch joint (Model name:CMY-Y102S-G2)
(Optional accessory)

A

B

IndoorIndoorIndoor

3*

Maximum of 3 units per port
Total capacity of P30 or below
(All units connected to the same port
must be in the same operating mode.)

Unit : mm [inch]

Pipe sections

High-pressure side (gas) Low-pressure side (gas)

ø15.88 [5/8"]

(Brazed connection)

ø19.05 [3/4"]

(Brazed connection)

ø22.2 [7/8"]

ø19.05 [3/4"]

(Brazed connection)

(Brazed connection)

ø28.58 [1-1/8"]

(Brazed connection)

ø15.88 [5/8"]

(Flare connection)

* BC controllers can only be connected to P72 - P120 models of outdoor units.

HWE0803A GB

- 51 -

[ II Restrictions ]

1) To connect P06 - P18 models of indoor units use
the reducer that is supplied with the BC controller.

2) To connect P36 - P96 models of indoor units (or when the
total capacity of indoor units exceeds P31), use a junction
pipe kit and merge the two nozzles.

50 [1-31/32"]

Liquid pipe side:3/8F
(Flare connection)

Gas pipe side:5/8F

Liquid pipe side: 6.35[1/4"]ID
Gas pipe side: 12.7[1/2"]ID

(Flare connection)

Liquid pipe side:3/8F
(Flare connection)

Gas pipe side:5/8F
(Flare connection)

234 [9-7/32"]

Liquid pipe side: 9.52[3/8”]ID

Gas pipe side: 19.05[3/4”]ID(*1)

Supplied with a thermal insulation cover

Note) Use the flare nut that is supplied with the BC controller.

3) To connect multiple indoor units to a port (or to a junction pipe)

Maximum total capacity of connected indoor units: P30 or below (in a system with a junction pipe: P96 or below)
Maximum number of connectable indoor units: 3 units
Branch joint: Use CMY-Y102S-G2 (optional accessory).
Refrigerant pipe selection (size of the pipes A and B in the previous page) : Select the proper size pipes based

on the total capacity of the downstream indoor units, using the table below as a reference.

Total capacity of indoor units Liquid pipe Gas pipe

P54 or below ø9.52 [3/8"] ø15.88 [5/8"]

P55 - P72 ø9.52 [3/8"] ø19.05 [3/4"]

P73 - P96 ø9.52 [3/8"] ø22.2 [7/8"]

Unit : mm [inch]

HWE0803A GB

- 52 -

[ II Restrictions ]

(2) Size of the pipe that fits the main BC controller ports

P72 - P240 models

Branch joint (Model name:CMY-Y102S-G2)
(Optional accessory)

To outdoor unit

Connection: Brazed connection

BC controller (main)

*1
Reducer
(Standard supplied parts)

Indoor Indoor Indoor

P18 model or below

P24 - P54 models P72 or P96 models

*2
Junction pipe kit
(Model name:CMY-R160-J)
(Optional accessory)

A B

Indoor Indoor Indoor

3*

Maximum of 3 units per port
Total capacity of P54 or below
(All units connected to the same port
must be in the same operating mode.)

The ports of the BC controller accommodates the pipes on P24 - P54 models of indoor units. To connect other types of indoor
units, follow the procedure below.

1) To connect P06 - P18 models of indoor units use the reducer that is supplied with the BC controller.

2) To connect the units between the P72 and P96 models of indoor units (or when the total capacity of indoor units is P55
or above), use a junction pipe kit and merge the two nozzles.

3) To connect multiple indoor units to a port (or to a junction pipe)

Maximum total capacity of connected indoor units: P54 or below (in a system with a junction pipe: P96 or below)
Maximum number of connectable indoor units: 3 units
Branch joint: Use CMY-Y102S-G2 (optional accessory).
Refrigerant pipe selection (size of the pipes in sections A and B in the figure above): Select the proper based on the total

capacity of the downstream indoor units, using the table below as a reference.

Total capacity of indoor units Liquid pipe Gas pipe

P54 or below ø9.52 [3/8"] ø15.88 [5/8"]

P55 - P72 ø9.52 [3/8"] ø19.05 [3/4"]

P73 - P96 ø9.52 [3/8"] ø22.2 [7/8"]

Pipe sections

Outdoor unit
side

Operation

PURY-P72THMU-A
PURY-P72YHMU-A

High pressure side (Liquid) Low-pressure side (Gas)

ø15.88 [5/8"]

(Brazed connection)

PURY-P96THMU-A
PURY-P96YHMU-A

PURY-P120THMU-A

ø19.05 [3/4"]

(Brazed connection)

PURY-P120YHMU-A

PURY-P144TSHMU-A
PURY-P144YSHMU-A

PURY-P168TSHMU-A
PURY-P168YSHMU-A

ø22.2 [7/8"]

(Brazed connection)

PURY-P192TSHMU-A
PURY-P192YSHMU-A

PURY-P216TSHMU-A
PURY-P216YSHMU-A

PURY-P240TSHMU-A

ø28.58 [1-1/8"]

(Brazed connection)

PURY-P240YSHMU-A

Indoor unit side ø9.52 [3/8"] (Flare connection) ø15.88 [5/8"] (Flare connection)

Unit : mm [inch]

Unit : mm [inch]

ø19.05 [3/4"]

(Brazed connection)

ø22.2 [7/8"]

(Brazed connection)

ø28.58 [1-1/8"]

(Brazed connection)

HWE0803A GB

- 53 -

[ II Restrictions ]

(3) Size of the pipe that fits the sub BC controller ports

Branch joint (Model name:CMY-Y102S-G2)
(Optional accessory)

A B

Indoor Indoor Indoor

3*

Maximum of 3 units per port

To Main BC controller

*1
Reducer
(Standard supplied parts)

Indoor Indoor Indoor

P18 model or below

Connection: Brazed connection

*2

BC controller (sub)

Junction pipe kit
(Model name:
CMY-R160-J)
(Optional accessory)

P24 - P54 models P72 or P96 models

Total capacity of P54 or below
(All units connected to the same port
must be in the same operating mode.)

The ports of the BC controller accommodates the pipes on P24 - P54 models of indoor units. To connect other types of indoor
units, follow the procedure below.

1) To connect P06 - P18 models of indoor units use the reducer that is supplied with the BC controller.

2) To connect the units between the P72 and P96 models of indoor units (or when the total capacity of indoor units is P55
or above), use a junction pipe kit and merge the two nozzles.

3) To connect multiple indoor units to a port (or to a junction pipe)

Maximum total capacity of connected indoor units: P54 or below (in a system with a junction pipe: P96 or below)
Maximum number of connectable indoor units: 3 units
Branch joint: Use CMY-Y102S-G2 (optional accessory).
Refrigerant pipe selection (size of the pipes in sections A and B in the figure above): Select the proper based on the total

capacity of the downstream indoor units, using the table below as a reference.

Total capacity of indoor units Liquid pipe Gas pipe

P54 or below ø9.52 [3/8"] ø15.88 [5/8"]

P55 - P72 ø9.52 [3/8"] ø19.05 [3/4"]

P73 - P96 ø9.52 [3/8"] ø22.2 [7/8"]

Operation Pipe sections

Total capacity of the in­door units that are con­nected to the BC

High-pressure side

(liquid)

Low-pressure side

(gas)

controller

On the BC controller
side

P72 model or below

P73 - P108

ø15.88 [5/8"]

(Brazed connection)

ø19.05 [3/4"]

ø19.05 [3/4"]

(Brazed connection)

ø22.2 [7/8"]

(Brazed connection)

(Brazed connection)

P109 - P126

P127 - P144

P145 - P168

ø22.2 [7/8"]

(Brazed connection)

ø28.58 [1-1/8"]

(Brazed connection)

Unit : mm [inch]

Unit : mm [inch]

Liquid pipe side

ø9.52 [3/8"]

(Brazed connection)

ø12.7 [1/2"]

(Brazed connection)

ø15.88 [5/8"]

(Brazed connection)

HWE0803A GB

- 54 -

III

Outdoor Unit Components

[1] Outdoor Unit Components and Refrigerant Circuit ..........................................................57

[2] Control Box of the Outdoor Unit.......................................................................................60

[3] Outdoor Unit Circuit Board............................................................................................... 64

[4] BC Controller Components.............................................................................................. 74

[5] Control Box of the BC Controller......................................................................................77

[6] BC Controller Circuit Board.............................................................................................. 78

HWE0803A GB

- 55 -

- 56 -

[ III Outdoor Unit Components ]

III Outdoor Unit Components

[1] Outdoor Unit Components and Refrigerant Circuit

1. Front view of a outdoor unit
(1) PURY-P72, P96, P120THMU-A

PURY-P72, P96, P120YHMU-A

Fan guard

Fan

Fin guard

Heat exchanger

Front panel

Control
Box

HWE0803A GB

- 57 -

[ III Outdoor Unit Components ]

2. Refrigerant circuit
(1) PURY-P72THMU-A

PURY-P72YHMU-A

Check valve(CV7a)

4-way valve(21S4a)

Solenoid valve(SV2)

High-pressure switch
(63H1)

Low pressure sensor
(63LS)

High pressure sensor
(63HS1)

Transformer box
(YHMU-A only)

Accumulator
(ACC)

Compressor cover

Solenoid valve(SV9)

Check valve(CV5a)

Solenoid valve block
(SV4a, SV4b, SV4d)

Check valve
(CV4a)

Check valve
(CV3a)

Check valve
(CV6a)

Check valve
(CV10a)

Check valve
(CV9a)

Check valve
(CV8a)

Check valve block
assembly (CV2a)

Solenoid valve(SV5b)

Solenoid valve (SV1a)

Oil separator (O/S)

Compressor (COMP)

High pressure check joint(CJ1)

Low pressure check joint(CJ2)

Refrigerant service valve on the low pressure side (BV1)

Solenoid valve(SV5c)

Refrigerant service valve on the high pressure side(BV2)

HWE0803A GB

- 58 -

[ III Outdoor Unit Components ]

(2) PURY-P96, P120THMU-A

PURY-P96, P120YHMU-A

Solenoid valve(SV2)

Low pressure sensor(63LS)

High-pressure switch
(63H1)

High pressure sensor
(63HS1)

Check valve(CV7a)

4-way valve(21S4a)

Solenoid valve(SV9)

Check valve(CV5a)

Solenoid valve block

(SV4a, SV4b, SV4c, SV4d)

Check valve

(CV6a)
Check valve
(CV3a)

Solenoid valve(SV5b)

Check valve
(CV4a)

High pressure check joint(CJ1)

Refrigerant service valve on the low pressure side(BV1)

Solenoid valve(SV5c)

Refrigerant service valve on the high pressure side (BV2)

Check valve block assembly (CV2a)

Low pressure check joint(CJ2)

Transformer box
(YHMU-A only)

Accumulator
(ACC)

Compressor cover

Solenoid valve (SV1a)

Compressor(COMP)

Oil separator (O/S)

Check valve
(CV10a)

Check valve
(CV9a)

Check valve
(CV8a)

HWE0803A GB

- 59 -

[ III Outdoor Unit Components ]

[2] Control Box of the Outdoor Unit

<HIGH VOLTAGE WARNING>

Control box houses high-voltage parts.
When opening or closing the front panel of the control box, do not let it come into contact with any of
the internal components.
Before inspecting the inside of the control box, turn off the power, keep the unit off for at least 10 minutes,
and Check that the voltage across terminals FT-P and FT-N (YHMU) on the INV board or the voltage at
both ends of the main capacitor (C1) (THMU) is 20VDC or below.
(It takes about 10 minutes to discharge electricity after the power supply is turned off.)

1. PURY-P72THMU-A

DC reactor (DCL)

Electromagnetic relay(72C)

Rush current
protection resistor
(R1) Note.2

Noise filter

Note.2

Terminal block for

power supply

(TB1)

Note.1

Ground terminal

Fan board

INV board

Smoothing capacitor(C1)

Control board

M-NET board

Terminal block for transmission line
(TB3, TB7)

1) Exercise caution not to damage the bottom and the front panel of the control box. Damage to these parts affect the water­proof and dust proof properties of the control box and may result in damage to its internal components.

2) Faston terminals have a locking function. Make sure the cable heads are securely locked in place. Press the tab on the ter­minals to remove them.

HWE0803A GB

- 60 -

[ III Outdoor Unit Components ]

2. PURY-P96, P120THMU-A

DC reactor (DCL)

Electromagnetic relay

(72C)

Diode stack

Noise filter

Current sensor

(ACCT3)

Current sensor

(DCCT1)

Terminal block for

power supply

(TB1)

Ground terminal

Smoothing capacitor(C1)

Note.2

Note.1

Fan board

Current sensor
(ACCT2)

INV board Control board

IPM

Current sensor
(ACCT1)

Terminal block for transmission line
(TB3, TB7)

M-NET board

1) Exercise caution not to damage the bottom and the front panel of the control box. Damage to these parts affect the water­proof and dust proof properties of the control box and may result in damage to its internal components.

2) Faston terminals have a locking function. Make sure the cable heads are securely locked in place. Press the tab on the ter­minals to remove them.

HWE0803A GB

- 61 -

[ III Outdoor Unit Components ]

3. PURY-P72, P96, P120YHMU-A

Electromagnetic relay(72C)

DC reactor (DCL)

Noise filter

Terminal block for
power supply

(TB1)

Fuse(F4)

Capacitor(C100)

Rush current protection resistor
(R1,R5) Note.2

Fan board

Control board

M-NET board

Fuse(F5)

Ground

terminal

Note.1

INV board

Terminal block for transmission line
(TB3, TB7)

1) Exercise caution not to damage the bottom and the front panel of the control box. Damage to these parts affect the water­proof and dust proof properties of the control box and may result in damage to its internal components.

2) Faston terminals have a locking function. Make sure the cable heads are securely locked in place. Press the tab on the ter­minals to remove them.

HWE0803A GB

- 62 -

[ III Outdoor Unit Components ]

4. Transformer Box (PURY-P72, P96, P120Y(T)HMU-A)

Transformer
(T03)

Transformer
(T02)

HWE0803A GB

- 63 -

[ III Outdoor Unit Components ]

[3] Outdoor Unit Circuit Board

1. Outdoor unit control board

CNAC2
L1
L2

CN505
72C driving output
(THMU)

CN51

Output 12VDC
Compressor
ON/OFF output

Error output

Actuator
driving output

CN72
72C driving output
(YHMU)

CNDC
Bus voltage input
P
N

CN2

Serial communication signal input
GND

INV board

Output 17VDC

CN801
Pressure switch
connection

CN332
Output 18VDC
GND
(Fan board)

CN4
GND
Serial communication signal output

LEV
driving output

LED1
Service LED

SWU1,2
Address switch

SW1-5

switch

Dip

Sensor
input

LED3
Lit when powered

LED2
Lit during normal
CPU operation

HWE0803A GB

CNAC
L1
L2

LED3
Lit
when powered

F01
Fuse
250V AC/3.15A

External signal input (contact input)

CN102

Power supply input for centralized control system (30VDC)
Indoor/outdoor transmission line input/output (30VDC)

- 64 -

CN41
Power supply for

CN40

centralized control OFF
Power supply for
centralized control ON

CNVCC2
Output 12VDC
Output 5VDC

CNIT
Output 12VDC
GND
Output 5VDC
Power supply detection input

Power supply ON/OFF signal output
CNS2
Transmission line input/output
for centralized control system (30VDC)

GND

[ III Outdoor Unit Components ]

2. M-NET board

(THMU only)
F01
250V

3.15A

Grounding

CN03(THMU only)
Bus voltage input
P
N

CN04
Bus voltage input
(YHMU only)
Bus voltage output
(THMU only)
P
N

CN102

Power supply output for centralized
control system (30VDC)
Indoor/outdoor transmission line
input/output (30VDC)

Grounding

Grounding

TB3
Indoor/outdoor transmission block

Ground terminal for
transmission line

CNS2
Transmission line
input/output for
centralized control
system (30VDC)

TB7
Terminal block for
transmission line for
centralized control

CNIT
Input 12VDC
GND
Input 5VDC
Power supply
detection output
Power supply
ON/OFF signal input

LED1
Power supply for
indoor
transmission line

TP1,2
Check pins for
indoor/outdoor
transmission line

HWE0803A GB

- 65 -

[ III Outdoor Unit Components ]

3. INV board
(1) PURY-P72THMU-A

SC-P1
Rectifier diode output (P)

C30,31,32
Smoothing capacitor

RSH1,2
Overcurrent detection
resistor

CN6
Open: No-load operation setting
Short-circuited: Normal setting

IGBT
(Rear)

CN5V
GND
Output 5VDC

LED1
Lit: Inverter in normal operation
Blink: Inverter error

CN4
GND

Serial communication signal output

CNDC
Bus voltage output
P
N

(INV Boar)

CN2

S

erial communication signal output

SC-P2
Bus voltage Input(

TB-P(Note)
Bus voltage output(P

P)

)

TB-N(Note)
Bus voltage output

(N)

SC-T
Input(L3)

CT3
Current sensor(

L3)

SC-S
Input(L2)

CT12
Current sensor

SC-R
Input(L1)

CT22
Current sensor

(U)

SC-U
Inverter output(U)

GND
Input 17VDC

SC-V
Inverter output(V)

SC-W
Inverter output(W)

(W)

Faston terminals have a locking function. Make sure the cable heads are securely locked in place. Press the tab on the ter­minals to remove them.

HWE0803A GB

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[ III Outdoor Unit Components ]

(2) PURY-P96, P120THMU-A

CNCT2
Current (AC) sensor input
ACCT1
ACCT2

CNCT
Current (DC) sensor input

FT-N(Note)
BUS voltage output

SC-P1
Bus voltage input/output(P)

(N)

IPM-P
BUS voltage output
(IPM input)

CNTH
Thermistor input
(THHS)

CNTYP
Function setting input
(Z26)

(P)

IPM-N
BUS voltage input/output(N)
(IPM input)

CNCT3
Current (AC) sensor input
(ACCT3)

LED1
Inverter in
normal operation

CNIPM

IPM driving power supply output
and signal output

IPM error signal input (IPM output)

CNDC1
BUS voltage output
P
N

LED2
Inverter error

LED4
Lit during normal
CPU operation

SW1
ON: No-load operation setting
OFF: Normal setting
: Fixed to OFF

CN5V
GND
Output 5VDC

CN2
Serial communication

signal output
GND
Output 17VDC

CN4
GND
(Fan board)
Serial communication

signal input

LED3
Lit while charging

CNFG
Functional earth

F02
Fuse
250VAC 3.15A

CNDC2
BUS voltage input
P
N

CNDC3
BUS voltage output
P
N

Faston terminals have a locking function. Make sure the cable heads are securely locked in place. Press the tab on the ter­minals to remove them.

HWE0803A GB

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[ III Outdoor Unit Components ]

(3) PURY-P72, P96, P120YHMU-A

Bus voltage check
terminal (P)
Note

IGBT
(Rear)

CN1
Bus voltage output
N

P
Bus voltage check
terminal (N)
Note 1

SC-L1
Input(L1)

SC-L2
Input(L2)

SC-P1

SC-P2
Bus voltage Input(P)

Rectifier diode output (P)

CN6
Open: No-load operation setting

LED1
Lit: Inverter in normal operation
Blink: Inverter error

Short-circuited: Normal setting

CN5V
GND
Output 5VDC

RSH1
Overcurrent detection
resistor

CN4
GND

CNTYP Inverter
board type

SC-V
Inverter output(V)

SC-W
Inverter output(W)

SC-U
Inverter output(U)

(INV Board)
Serial communication
signal output

CN2

S

erial communication
signal output
GND
Input 17VDC

SC-L3
Input(L3)

CT22
Current sensor(W)

CT3
Current sensor(L3)

CT12
Current sensor(U)

C30 C37
Smoothing capacitor

1) Before inspecting the inside of the control box, turn off the power, keep the unit off for at least 10 minutes, and confirm that
the voltage between FT-P and FT-N on INV Board has dropped to DC20V or less.
(It takes about 10 minutes to discharge electricity after the power supply is turned off.)

HWE0803A GB

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[ III Outdoor Unit Components ]

4. Fan board

(1) PURY-P72, P96, P120THMU-A

CNVDC
Bus voltage input

N
 P

F01
Fuse
250VAC 15A

LED3
Lit during normal
CPU operation

CN18V

Input 18VDC
 GND

CN4

GND
 Serial communication signal output
 GND（Control board）
 Serial communication signal output

CN22

GND（INV board）
 Input 5VDC

Serial communication signal input

GND（INV board）
 Input 17VDC

CN21

Serial communication signal output

GND（INV board）
 Input 17VDC

R630
Overcurrent detection
resistor

CNINV
Inverter output

W
 V
 U

DIP IPM（Rear）

THBOX
Thermistor
(Control box internal temperature
detection)

LED1
Inverter in normal operation

LED2
Inverter error

HWE0803A GB

- 69 -

[ III Outdoor Unit Components ]

(2) PURY-P72, P96, P120YHMU-A

CNVDC
Bus voltage input
N
P

CNINV
Inverter output
W
V
U

R630,R631
Overcurrent detection
resistor

DIP IPM Rear

CN18V
Input 18VDC
GND

LED3
Lit during normal
CPU operation

CN4
GND
Serial communication signal output

CN5

GND(Control board)

Serial communication signal output

CN21
Serial communication signal output
GND(INV board)
Input 17VDC

CN22
GND(INV board)
Input 5VDC
Serial communication signal input
GND(INV board)
Output 17VDC

THBOX
Thermistor
(Control box internal temperature
detection)

LED1
Inverter in normal operation
LED2
Inverter error

HWE0803A GB

- 70 -

[ III Outdoor Unit Components ]

5. Noise Filter

(1) PURY-P72THMU-A

F2
Fuse
250VAC 6.3A

F1
Fuse
250VAC 6.3A

Grounding

TB21
Input/output（L1）

CN02
Output

L1
 L2

TB22
Input/output（L2）

TB23
Input/output（L3）

CN01
Input

L3
 L2
 L1

HWE0803A GB

- 71 -

[ III Outdoor Unit Components ]

(2) PURY-P96, P120THMU-A

R1,2
Rush current
protection resistor

F3
Fuse
250VAC 6.3A

Grounding

CN02
Output

L1
 L2

F1
Fuse
250VAC 6.3A

F2
Fuse
250VAC 6.3A

TB42
Bus voltage output（N）

TB31
Bus voltage output（P）

CN03
72C drive input

Electromagnetic relay

（72C）

Diode stack rectified voltage
input (Diode stack output)

Output

（Diode stack input）

TB23
Input

（L3）
TB22

Input

（L2）

TB21
Input

（L1）

CN01
Input

L3
 L2
 L1

HWE0803A GB

- 72 -

[ III Outdoor Unit Components ]

(3) PURY-P72, P96, P120YHMU-A

CN4
Output
(Rectified L2-L3 current)
P
N

CN2
Surge absorber circuit
Surge absorber circuit
Short circuit
Short circuit

F1,F2,F3,F4
Fuse
250VAC 6.3A

Grounding

CN1A
Input
L1

CN5
Output
(Rectified L2-L3 current)
P
N

CN6
Input
L2
L3

Grounding

CN1B
Input
L3
L2

HWE0803A GB

TB21
Input/output(L1)

TB22
Input/output(L2)

- 73 -

TB23
Input/output(L3)

[ III Outdoor Unit Components ]

[4] BC Controller Components

1. CMB-P NU-G, GA

(1) Front

Liquid pipe (Indoor unit side)

Gas pipe (Indoor unit side)

(2) Rear view <G type>

Gas/Liquid separator

Tube in tube heat exchanger

TH12

PS1

TH11

SVM1
LEV3

LEV1

PS3

TH16

TH15

HWE0803A GB

- 74 -

[ III Outdoor Unit Components ]

(3) Rear view <GA type>

Gas/Liquid separator

Tube in tube heat exchanger

TH11

TH12

LEV2

TH16

PS3

TH15

PS1

LEV3

LEV1

SVM2

SVM1

HWE0803A GB

- 75 -

[ III Outdoor Unit Components ]

2. CMB-P NU-GB, HB

(1) Front

(2) Rear view

Liquid pipe (Indoor unit side)

Gas pipe (Indoor unit side)

TH12

LEV3

TH15

HWE0803A GB

- 76 -

[ III Outdoor Unit Components ]

[5] Control Box of the BC Controller

1. CMB-P1016NU-G, GA

Transformer

Terminal block for
power supply

Terminal block for
transmission line

Relay board

BC controller board

HWE0803A GB

- 77 -

[ III Outdoor Unit Components ]

[6] BC Controller Circuit Board

1. BC controller circuit board (BC board)

SW4

HWE0803A GB

SW5

SW6

- 78 -

SW1SW2

[ III Outdoor Unit Components ]

2. RELAY BOARD (RELAY 4 board)

3. RELAY BOARD (RELAY 10 board)

HWE0803A GB

- 79 -

- 80 -

IV

Remote Controller

[1] Functions and Specifications of MA and ME Remote Controllers ...................................83

[2] Group Settings and Interlock Settings via the ME Remote Controller .............................84

[3] Interlock Settings via the MA Remote Controller .............................................................88

[4] Using the built-in Temperature Sensor on the Remote Controller ...................................89

HWE0803A GB

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- 82 -

[ IV Remote Controller ]

IV Remote Controller

[1] Functions and Specifications of MA and ME Remote Controllers

There are two types of remote controllers: M-NET (ME) remote controller, which is connected on the indoor-outdoor
transmission line, and MA remote controller, which is connected to each indoor unit.

1. Comparison of functions and specifications between MA and ME remote controllers

Functions/specifications MA remote controller

*1*2

M-NET (ME) remote controller

*2*3

Remote controller address settings Not required Required

Indoor/outdoor unit address set­tings

Wiring method Non-polarized 2-core cable

Not required (required only by a system
with one outdoor unit)

*4

Required

Non-polarized 2-core cable

To perform a group operation, daisy-

chain the indoor units using non-polar­ized 2-core cables.

Remote controller connection Connectable to any indoor unit in the

group

Interlock with the ventilation unit Each indoor unit can individually be in-

terlocked with a ventilation unit. (Set up
via remote controller in the group.)

Changes to be made upon group­ing change

MA remote controller wiring between in­door units requires rewiring.

Connectable anywhere on the indoor-out­door transmission line

Each indoor unit can individually be inter­locked with a ventilation unit. (Set up via
remote controller.)

Either the indoor unit address and remote
controller address must both be changed,
or the registration information must be
changed via MELANS.

*1. MA remote controller refers to MA remote controller (PAR-20MAA, PAR-21MAA), MA simple remote controller, and wire-

less remote controller.

*2. Either the MA remote controller or the M-NET remote controller can be connected when a group operation of units in a

system with multiple outdoor units is conducted or when a system controller is connected.
*3. M-NET remote controller refers to ME remote controller and ME simple remote controller.
*4. Depending on the system configuration, some systems with one outdoor unit may require address settings.

2. Remote controller selection criteria

MA remote controller and M-NET remote controller have different functions and characteristics. Choose the one that better
suits the requirements of a given system. Use the following criteria as a reference.

MA remote controller

*1*2

There is little likelihood of system expansion and group-

ing changes.

Grouping (floor plan) has been set at the time of instal-

lation.

M-NET (ME) remote controller

There is a likelihood of centralized installation of remote

controllers, system expansion, and grouping changes.

Grouping (floor plan) has not been set at the time of in-

stallation.

*1*2

To connect the remote controller directly to the OA pro-

cessing unit.

*1. M-NET remote controller and MA remote controller cannot both be connected to the same group of indoor units.
*2. A system controller must be connected to a system to which both MA remote controller and M-NET remote controller are

connected.

<System with MA remote controller> <System with M-NET remote controllers>

Outdoor unit

M-NET transmission line
(indoor/outdoor transmission line)

groupgroup

Outdoor unit

M-NET transmission line
(indoor/outdoor transmission line)

groupgroup

BC

controller

MA remote controller

HWE0803A GB

Indoor unit

- 83 -

BC

controller

M-NET remote controller

Indoor unit

[ IV Remote Controller ]

[2] Group Settings and Interlock Settings via the ME Remote Controller

1. Group settings/interlock settings

Make the following settings to perform a group operation of units that are connected to different outdoor units or to manually set up the
indoor/outdoor unit address.

(A) Group settings...........Registration of the indoor units to be controlled with the remote controller,

and search and deletion of registered information.

(B) Interlock settings........Registration of LOSSNAY units to be interlocked with the indoor units,

and search and deletion of registered information

[Operation Procedures]

(1) Address settings

Register the indoor unit to be controlled with the remote controller.

1

Bring up either the blinking display of HO by turning on the unit or the

normal display by pressing the ON/OFF button.

The display window must look like one of the two figures below to proceed to the
next step.

C

G

E

STAND BY
DEFROST

PAR-F27MEA

CENTRALLY CONTROLLED

DAILY

AUTO OFF

CLOCK

REMAINDER

˚C

TEMP.

CLOCK→ON→OFF

TIMER SET

ON OFF

1Hr.

NOT AVAILABLE

˚C

CHECK MODE
TEST RUN
LIMIT TEMP.

ON/OFF

FILTER

FILTER

CHECK TEST

F

?

A

D

[Blinking display of HO ]

Bring up the Group Setting window.

2

-Press and hold buttons [FILTER] and [ ]
simultaneously for 2 seconds to bring up the display as

A

B

[Normal display]

shown below.

Indoor unit address display window

3

Select the unit address.

-

Select the address of the indoor unit to be registered by pressing

button

through the addresses.

4

Register the indoor unit whose address appears on the

C

[TEMP. ( ) or ( )] to advance or go back

display.

- Press button [TEST] to register the indoor unit address

D

whose address appears on the display.

- If registration is successfully completed, unit type will appear

on the display as shown in the figure below.

- If the selected address does not have a corresponding indoor

unit, an error message will appear on the display. Check the
address, and try again.

<Successful completion of registration>

Unit type (Indoor unit in this case)

<Deletion error>

H

B

(B) Interlock Settings (A) Group Settings

6

Bring up the Interlock Setting window.

-Press button [ ] to bring up the following display.

G

Press again to go back to the Group Setting window as shown
under step .

Indoor unit
address
display window

7

Bring up the address of the indoor unit and the address of the

2

Interlocked unit
address
display window

Both the indoor unit address and
interlocked unit address will be
displayed together.

To search for an address,
go to section (2) Address Search.

LOSSNAY to be interlocked on the display.

- Select the address of the indoor unit to be registered by pressing
button [TEMP. ( ) or ( )] to advance or go back through

C

the addresses.

- Select the address of the LOSSNAY unit to be interlocked by
pressing button [TIMER SET ( ) or ( )] to advance or go back
through the interlocked unit addresses.

8

Make the settings to interlock LOSSNAY units with indoor
units.

- Press button [TEST] while both the indoor unit address and

H

D

the address of the LOSSNAY units to be interlocked
are displayed to enter the interlock setting.

- Interlock setting can also be made by bringing up the
LOSSNAY address in the indoor unit address display
window and the indoor unit address in the interlocked unit
address display window.

If registration is successfully

blinks to indicate a registration error.
(Indicates that selected address does not have a
corresponding unit.)

5

To register the addresses for multiple indoor units, repeat
steps and above.

3

4

(Displayed alternately)

completed, the two displays as
shown on the left will appear
alternately.
If the registration fails,
will blink on the display.
(Indicates that the selected
address does not have a
corresponding unit.)

To search for an address,
go to section (2) Address Search.

NOTE : Interlock all the indoor units in the group with the
LOSSNAY units; otherwise, the LOSSNAY units will
not operate.

To next page.

HWE0803A GB

- 84 -

[ IV Remote Controller ]

(C) To return to the normal display
When all the group settings and interlock settings are made, take the
following step to go back to the normal display.

10

Press and hold buttons [FILTER] and [ ]
simultaneously for 2 seconds to go back to the
window as shown in step .

A

1

B

(2) Address search

To search for the address of indoor units that have been entered into
the remote controller, follow steps and .

1

2

(A) To search group settings

11

Bring up the Group Setting window.

- Each pressing of button [ ] will bring up the address of a

E

registered indoor unit and its unit type on the display.

<Entry found>

Unit type
(Indoor unit in this case)

<No entries found>

- When only one unit address is registered, the same address
will remain on the display regardless of how many times the
button is pressed.

- When the address of multiple units are registered
(i.e. 011, 012, 013 ), they will be displayed one at a time in
an ascending order with each pressing of button [ ] .

E

Repeat steps and in the previous page to interlock

9

all the indoor units in a group with the LOSSNAY unit.

To go back to the normal display,
follow step .

7

8

To search for an address,

10

go to section (2) Address Search.

(B) Interlock setting search

After performing step , proceed as follows:

12

Bring up the address of the indoor unit to be searched on

6

the display.

- Select the address of the indoor unit to be searched by pressing

H

button [TIMER SET ( ) or ( )] to advance or go back
through the interlocked addresses.

LOSSNAY can be searched in the same manner by bringing up
the LOSSNAY address in the Interlocked unit address display window.

13

Bring up on the display the address of the LOSSNAY unit
that was interlocked with the indoor unit in step .

- With each pressing of button [ ], the address of the

E

LOSSNAY and indoor unit that is interlocked with it will be
displayed alternately.

Address of an interlocked
LOSSNAY unit

(Displayed alternately)

12

14

To delete an address, go to
section (3) Address Deletion.

Bring up the address of another registered unit on the
display.

- After completing step , a subsequent pressing of button

E

[ ] will bring up the address of another registered

13

unit.
(The display method is the same as the one in step .)

To go back to the normal display,
follow step .

10

Address of another
interlocked unit

(Displayed alternately)

To delete an address,

(3) Address deletion

go to section (3) Address Deletion .

The addresses of the indoor units that have been entered into the remote controller can be deleted by deleting the group settings.
The interlock settings between units can be deleted by deleting the interlock settings.
Follow the steps in section (2) Address Search to find the address to be deleted and perform deletion with the address being displayed in the
display window. To delete an address, the address must first be bought up on the display.

15

Delete the registered indoor unit address or the interlock setting between units.

- Press button ? [CLOCK ON OFF] twice while either the indoor unit address or the address of the interlocked unit is displayed on the

F

display to delete the interlock setting.

13

HWE0803A GB

- 85 -

[ IV Remote Controller ]

(A) To delete group settings

(B) To delete interlock settings

<Successful completion of deletion>

will be displayed in the room temperature display window.

(Displayed alternately)

- If a transmission error occurs, the selected setting will not be
deleted, and the display will appear as shown below.
In this case, repeat the steps above.

<Deletion error>

will be displayed in the room temperature display window.

To go back to the normal display, follow step .

10

(4) Making (A) Group settings and (B) Interlock settings of a group from any arbitrary remote controller

(A) Group settings and (B) Interlock settings of a group can be made from any arbitrary remote controller.
Refer to (B) Interlock Settings under section 1 Group Settings/Interlock Settings for operation procedures.
Set the address as shown below.

(A) To make group settings
Interlocked unit address display window...Remote controller address

Indoor unit address display window...........The address of the indoor unit to be controlled with the remote controller

(B) To make interlock settings
Interlocked unit address display window...LOSSNAY address

Indoor unit address display window..........The address of the indoor unit to be interlocked with the LOSSNAY

If deletion is successfully
completed, will appear in
the unit type display window.
If the deletion fails, will
appear in the unit type display
window. In this case, repeat the
steps above.

- -

2. Remote controller function selection via the ME remote controller

In the remote controller function selection mode, the settings for four types of functions can be made or changed as necessary.

1) Skip-Auto-Mode setting
The automatic operation mode that is supported by some simultaneous cooling/heating type units can be made unselectable via the ME remote
controller.

2) Operation mode display selection mode (Display or non-display of COOL/HEAT during automatic operation mode)
When the automatic operation mode is selected, the indoor unit will automatically perform a cooling or heating operation based on the room
temperature. In this case, or will appear on the remote controller display.
This setting can be changed so that only will appear on the display.

3) Room temperature display selection mode (Display or non-display of room temperature)
Although the suction temperature is normally displayed on the remote controller, the setting can be changed so that it will not appear on the
remote controller.

4) Narrowed preset temperature range mode
The default temperature ranges are 19 C to 30 C in the cooling/dry mode and 17 C to 28 C in the heating mode and 19 C to 28 C in the auto mode.

By changing these ranges (raising the lower limit for the cooling/dry mode and lowering the upper limit for the heating mode), energy can be saved.

NOTE

When making the temperature range setting on the simultaneous cooling/heating type units that supports the automatic operation mode to save on
energy consumption, enable the Skip-Auto-Mode setting to make the automatic operation mode unselectable. If the automatic operation mode is
selected, the energy-saving function may not work properly.

When connected to the air conditioning units that do not support the automatic operation mode, the setting for the Skip-Auto-Mode, restricted preset
temperature range mode (AUTO), and operation mode display selection mode are invalid. If an attempt is made to change the preset temperature range,
“LIMIT TEMP.” appears on the display.

PAR-F27MEA

TEMP.

TIMER SET

CLOCKĺONĺOFF

ON/OFF

FILTER

CHECK TEST

Normal display

1 1

Remote controller function selection mode

Skip-Auto-Mode setting

Temperature range setting mode (AUTO)

Operation mode display selection mode (Display or non-display of the automatic mode)

5

Restricted preset temperature range mode (Cooling)

4

Restricted preset temperature range mode (Heating)

Room temperature display selection mode

[Function selection mode sequence on the remote controller]

*2

3

2

3

2

*2

3

2

3

2

3

2

3

*1 *1

2

[Normal display]

1

: Press and hold the [CHECK] and
[ ] buttons simultaneously
for two seconds.

2

: [SET TEMP.

3

: [SET TEMP.

2

3

*1 : Skip-Auto-Mode is enabled
*2 : Skip-Auto-Mode is disabled

( ) ]
( ) ]

button
button

HWE0803A GB

- 86 -

[ IV Remote Controller ]

[Operation Procedures]

1. Press the [ON/OFF] button on the remote controller to bring the unit to a stop. The display will appear as shown in the previous page (Normal
display).

2. Press buttons [CHECK] and [ ] simultaneously for 2 seconds to go into the “Skip-Auto-Mode setting.”
under the remote controller function selection mode. Press button [SET TEMP. ( )] or [SET TEMP. ( )] to go into the other four modes

1

2

3

under the remote controller function selection mode.

Skip-Auto-Mode setting (Making the automatic operation mode unselectable)

This setting is valid only when the controller is connected to the simultaneous cooling/heating type air conditioning units that
support the automatic operation mode.

“ ” blinks and either “ON” or “OFF” lights up on the controller. Pressing the [TIMER SET ( ) or ( )] button switches

4

between “ON” and “OFF.”

[TIMER SET ( ) (( ))] button

When set to “ON,” the automatic operation mode is available for selection in the function selection mode.
When set to “OFF,” the automatic operation mode is not available for selection in the function selection mode, and an automatic operation
cannot be performed.
(The automatic operation mode is skipped in the function selection mode sequence.)

Operation mode display selection mode (Changing the type of display that appears during the automatic mode operation)

When connected to the air conditioning units that do not support the automatic operation mode, the setting for this mode is invalid.

will blink, and either

switch between “ON” and “OFF.”

“ON”or“

OFF” will light up.

Press button [TIMER SET ( ) or ( )] in this state to

4

[TIMER SET ( ) (( ))] button

When it is set to ON, will appear on the display during automatic operation mode.
When it is set to OFF, only will appear on the display during automatic operation mode.

Restricted preset temperature range mode (The range of preset temperature can be changed.)

1) Temperature range setting for the cooling/dry mode

will light up in the display window, and the temperature range for the cooling/dry mode will appear on the display.
[Lower limit temperature]: Appears in the preset temperature display window [Upper limit temperature: Appears in the time display window
Switch between the Lower and Upper limit temperature setting by pressing the [CLOCK-ON-OFF] button. The selected temperature setting blinks.

[TIMER SET ( ) (( ))] button

[The left figure shows the display that appears when the current temperature range setting is between 19 C and 30 C in the Cool/Dry mode,
and the lower limit temperature is selected to be set.]

Press button [TIMER SET ( ) or ( )] to set the lower limit temperature to the desired temperature.

4

[Settable range for the lower limit temperature] : 19 C 30 C (Settable up to the upper limit temperature that is shown on the display)
[Settable range for the upper limit temperature] : 30 C 19 C (Settable up to the lower limit temperature that is shown on the display)

2) Temperature range setting for heating
“ ” and the settable temperature range for heating appear on the display.

As with the Cool/Dry mode, use the [CLOCK-ON-OFF] button and the [TIMER SET ( ) or ( )] to set the temperature range.

5

[Settable range for the lower limit temperature] : 17 C 28 C (Settable up to the upper limit temperature that is shown on the display)
[Settable range for the upper limit temperature] : 28 C 17 C (Settable up to the lower limit temperature that is shown on the display)

3) Temperature range setting for the automatic mode

When connected to the air conditioning units that do not support the automatic operation mode, the setting for this mode is invalid.

“ ” and the temperature range for the automatic operation mode appear on the display.
As with the Cool/Dry mode, use the [CLOCK-ON-OFF] button and the [TIMER SET ( ) or ( )] to set the temperature range.
[Settable range for the lower limit temperature] : 19 C

5

28 C (Settable up to the upper limit temperature that is shown on the display)

[Settable range for the upper limit temperature] : 28 C 19 C (Settable up to the lower limit temperature that is shown on the display)

5

4

4

Room temperature display selection mode (Switching between the display or non-display of room temperature on the controller)

“ 88 C ” blinks and either “ON” or “OFF” lights up on the controller. Pressing the [TIMER SET ( ) or ( )] button

4

switches between “ON” and “OFF.”

˚C ˚C

[TIMER SET ( ) (( ))] button

When set to “ON,” room temperature always appears on the display during operation.
When set to “OFF,” room temperature does not appear on the display during operation.

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[ IV Remote Controller ]

[3] Interlock Settings via the MA Remote Controller

1. LOSSNAY interlock setting (Make this setting only when making an interlock settings between the LOSSNAY units
and the Freeplan model of units.)

Make this setting only when necessary.

Perform this operation to enter the interlock setting between the LOSSNAY and the indoor units to which the remote controller is connected, or to
search and delete registered information.

In the following example, the address of the indoor unit is 05 and the address of the LOSSNAY unit is 30.

[Operation Procedures]

Press the [ON/OFF] button on the remote controller to bring the unit to a stop.

1

The display window on the remote controller must look like the figure below to proceed to step .

Press and hold the [FILTER] and [ ] buttons simultaneously for two seconds to perform a search for the LOSSNAY that is interlocked with the

2

indoor unit to which the remote controller is connected.

Search result

3

- The indoor unit address and the interlocked LOSSNAY address will appear alternately.

<Indoor unit address and indoor unit> <LOSSNAY address and LOSSNAY>

- Without interlocked LOSSNAY settings

2

4

If no settings are necessary, exit the window by pressing and holding the [FILTER] and [ ] buttons simultaneously for 2 seconds.
Go to step 1. Registration Procedures to make the interlock settings with LOSSNAY units, or go to step 2. Search Procedures to search for a
particular LOSSNAY unit.
Go to step 3. Deletion Procedures to delete any LOSSNAY settings.

< 1. Registration Procedures >

5

To interlock an indoor unit with a LOSSNAY unit, press the [ TEMP. ( ) or ( )] button on the remote controller that is connected to the indoor
unit, and select its address (01 to 50).

6

Press the [ CLOCK ( ) or ( )] button to select the address of the LOSSNAY to be interlocked (01 to 50).

Indoor unit address LOSSNAY address

7

Press the [TEST] button to register the address of the selected indoor unit and the interlocked LOSSNAY unit.

- Registration completed
The registered indoor unit address and IC, and the interlocked LOSSNAY address and LC will appear alternately.

- Registration error
If the registration fails, the indoor unit address and the LOSSNAY address will be displayed alternately.

Registration cannot be completed: The selected unit address does not have a corresponding indoor unit or a LOSSNAY unit.
Registration cannot be completed: Another LOSSNAY has already been interlocked with the selected indoor unit.

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[ IV Remote Controller ]

< 2. Search Procedures >

8

To search for the LOSSNAY unit that is interlocked with a particular indoor unit, enter the address of the indoor unit into the remote controller that is
connected to it.

<Indoor unit address>

9

Press the [ MENU] button to search for the address of the LOSSNAY unit that is interlocked with the selected indoor unit.

- Search completed (With a LOSSNAY connection)
The indoor unit address and IC, and the interlocked LOSSNAY address and LC will appear alternately.

- Search completed (No interlocked settings with a LOSSNAY exist.)

- The selected address does not have a corresponding indoor unit.

< 3. Deletion Procedures >

Take the following steps to delete the interlock setting between a LOSSNAY unit and the interlocked indoor unit from the remote controller
that is connected to the indoor unit.
Find the address of the LOSSNAY to be deleted (See section 2. Search Procedures. ), and bring up the result of the search for both the

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indoor unit and LOSSNAY on the display.

11

Press the [ ON/OFF] button twice to delete the address of the LOSSNAY unit that is interlocked with the selected indoor unit.

- Registration completed
The indoor unit address and , and the interlocked LOSSNAY address and will appear alternately.

-Deletion error
If the deletion fails

[4] Using the built-in Temperature Sensor on the Remote Controller

1. Selecting the position of temperature detection (Factory setting: SW1-1 on the controller board on the indoor unit is
set to OFF.)

To use the built-in sensor on the remote controller, set the SW1-1 on the controller board on the indoor unit to ON.

Some models of remote controllers are not equipped with a built-in temperature sensor. Use the built-in temperature sensor

on the indoor unit instead.

When using the built-in sensor on the remote controller, install the remote controller where room temperature can be detected.

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V

Electrical Wiring Diagram

[1] Electrical Wiring Diagram of the Outdoor Unit .................................................................93

[2] Electrical Wiring Diagram of the BC Controller................................................................96

[3] Electrical Wiring Diagram of Transmission Booster.......................................................105

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