Mitsubishi CMB-P104, P96TGMU-A, PQRY-P72, CMB-P108, P1016NU-GA Service Handbook

...

Page 1

AIR CONDITIONERS CITY MULTI

Models

PQHY-P72, P96TGMU-A PQRY-P72, P96TGMU-A CMB-P104, P105, P106, P108, P1010, P1013, P1016NU-G CMB-P108, P1010, P1013, P1016NU-GA CMB-P104, P108NU-GB

Service Handbook

Page 2

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 ser-

vices. 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.

Page 3

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.

Page 4

Precautions for handling units for use with R410A

CAUTION

Do not use the existing refrigerant piping.

A large amount of chlorine that may be contained in the re-

sidual refrigerant and refrigerating machine oil in the existing piping may cause the refrigerating machine 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 de-

tect 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.

Page 5

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. am-

monia, 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.

Page 6

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

WARNING

When installing or relocating the unit, make sure that no substance other than the specified refrigerant (R410A) enters the refrigerant circuit.

Any presence of foreign substance such as air can cause abnormal pressure rise or explosion.

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 children.

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.

Page 7

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.

Page 8

I 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 ............................................................................................................ 11

[10] Remedies to be taken in case of a Refrigerant Leak............................................................ 11

[11] Characteristics of the Conventional and the New Refrigerants ............................................ 12

[12] Notes on Refrigerating Machine Oil...................................................................................... 13

II Restrictions

[1] Types and Maximum allowable Length of Cables................................................................ 17

[2] Switch Settings and Address Settings.................................................................................. 18

[3] Sample System Connection ................................................................................................. 23

[4] An Example of a System to which an MA Remote Controller is connected ......................... 24

[5] An Example of a System to which an M-NET Remote Controller is connected ................... 46

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

Controller are connected ......................................................................................................50

[7] Restrictions on Pipe Length.................................................................................................. 53

III Heat Source Unit / BC Controller Components

[1] Heat Source Unit Components and Refrigerant Circuit........................................................ 67

[2] Control Box of the Heat Source Unit .................................................................................... 69

[3] Heat Source Unit Circuit Board ............................................................................................ 70

[4] BC Controller (Under the panel)........................................................................................... 73

[5] Control Box of the BC Controller .......................................................................................... 75

[6] BC Controller Circuit Board .................................................................................................. 76

CONTENTS

IV Remote Controller

[1] Functions and Specifications of MA and ME Remote Controllers ........................................ 81

[2] Group Settings and Interlock Settings via the ME Remote Controller.................................. 82

[3] Interlock Settings via the MA Remote Controller.................................................................. 86

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

V Electrical Wiring Diagram

[1] Electrical Wiring Diagram of the Heat Source Unit............................................................... 93

[2] Electrical Wiring Diagram of the BC Controller..................................................................... 94

VI Refrigerant Circuit

[1] Refrigerant Circuit Diagram ................................................................................................ 105

[2] Principal Parts and Functions............................................................................................. 109

VII Control

[1] Functions and Factory Settings of the Dipswitches............................................................ 121

[2] Controlling the Heat Source Unit ........................................................................................ 129

[3] Controlling BC Controller.................................................................................................... 142

[4] Operation Flow Chart ......................................................................................................... 143

VIII Test Run Mode

[1] Items to be checked before a Test Run.............................................................................. 157

[2] Test Run Method................................................................................................................ 158

[3] Operating Characteristic and Refrigerant Amount.............................................................. 159

[4] Adjusting the Refrigerant Amount....................................................................................... 160

[5] Refrigerant Amount Adjust Mode ....................................................................................... 164

[6] The following symptoms are normal................................................................................... 168

[7] Standard Operation Data (Reference Data)....................................................................... 169

Page 9

CONTENTS

IX Troubleshooting

[1] Check Code Lists................................................................................................................ 179

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

[3] Investigation of Transmission Wave Shape/Noise ............................................................. 265

[4] Troubleshooting Principal Parts.......................................................................................... 268

[5] Refrigerant Leak ................................................................................................................. 298

[6] Servicing the BC controller ................................................................................................. 300

X LED Monitor Display on the Heat Source Unit Board

[1] How to Read the LED on the Service Monitor ....................................................................305

Page 10

I 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 ....................................................................................................... 11

[10] Remedies to be taken in case of a Refrigerant Leak....................................................... 11

[11] Characteristics of the Conventional and the New Refrigerants .......................................12

[12] Notes on Refrigerating Machine Oil................................................................................. 13

- 1 -

Page 11

- 2 -

Page 12

[ I Read Before Servicing ]

I Read Before Servicing

[1] Read Before Servicing

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

Refrigerant Type CITY MULTI WY/WR2: 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 page 4 for information on the use of tools.

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.

- 3 -

Page 13

[ I Read Before Servicing ]

[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)

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

Tools/Materials Use Notes

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

high-pressure side

Charging Hose Evacuation and refrigerant charging

Refrigerant Recovery Cylinder Refrigerant recovery

Refrigerant Cylinder Refrigerant charging The refrigerant type is indicated. The

cylinder is pink.

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

that of the current port.

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

may be used.

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

attached.

Flare Tool Flare processing Flare processing dimensions for the pip-

ing in the system using the new refrigerant differ from those of R22. Refer to page 6.

Refrigerant Recovery Equipment Refrigerant recovery May be used if compatible with R410A.

3. Tools and materials that are used with R22 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.

- 4 -

Page 14

[ I Read Before Servicing ]

[3] Piping Materials

Do not use the existing piping!

New Piping Existing Piping

NOOK

1. Copper pipe materials

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

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

at the same radial thickness.

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

of the pipes themselves.

O-materials (Annealed) can easily be bent with hands. 1/2H-materials, H-materials (Drawn) are considerably stronger than O-material (Annealed) at the same thickness.

2. Types of copper pipes

Maximum working pressure Refrigerant type

3.45 MPa[500psi] R22 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.

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

ø6.35 [1/4"] 0.8t [0.0315]

ø9.52 [3/8"] 0.8t [0.0315]

ø12.7 [1/2"] 0.8t [0.0315]

ø15.88 [5/8"] 1.0t [0.0394]

ø19.05 [3/4"] 1.0t [0.0394]

ø22.2 [7/8"] 1.0t [0.0394]

ø28.58 [1-1/8"] 1.0t [0.0394]

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, Hmaterial (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)

- 5 -

Page 15

[ 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) 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])

Pipe size (mm[in])

ø6.35 [1/4"] 9.1 [0.358] 9.0 [0.354]

ø9.52 [3/8"] 13.2 [0.520] 13.0 [0.512]

ø12.7 [1/2"] 16.6 [0.654] 16.2 [0.638]

ø15.88 [5/8"] 19.7 [0.776] 19.4 [0.764]

ø19.05 [3/4"] 24.0 [0.945] 23.3 [0.917]

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.

A dimension (mm[in])

R410A R22

Dimension A

6. Flare nut

Type-2 flare nuts instead of type-1 are used to increase the strength. The size of some of the flare nuts have also been

changed.

Flare nut dimensions (mm[in])

Pipe size (mm[in])

ø6.35 [1/4"] 17.0 [0.669] 17.0 [0.669]

ø9.52 [3/8"] 22.0 [0.866] 22.0 [0.866]

ø12.7 [1/2"] 26.0 [1.024] 24.0 [0.945]

ø15.88 [5/8"] 29.0 [1.142] 27.0 [1.063]

ø19.05 [3/4"] 36.0 [1.417] 36.0 [1.417]

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.

B dimension (mm[in])

R410A R22

Dimension B

- 6 -

Page 16

[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

[ I Read Before Servicing ]

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.

1. Notes

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

- 7 -

Page 17

[ I Read Before Servicing ]

[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.

- 8 -

Page 18

[ I Read Before Servicing ]

[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.

NO NO

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

tightness, taking temperature variations into account.

When using refrigerant instead of a leak detector to find the location of a leak, use R410A. 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 compo-

sition 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.

- 9 -

Page 19

[ I Read Before Servicing ]

[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 (Photos 2)

Use a vacuum pump that attains 0.5Torr(65Pa) or lower degree of vacuum after 5 minutes of operation, and connect it di-

rectly 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 rec-

ommended 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 vac-

uum 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

penetrated 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 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.)

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

- 10 -

Page 20

[9] Refrigerant Charging

[ I Read Before Servicing ]

Cylinder with a siphon

Cylinder

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

Valve Valve

liquid

Cylinder without a siphon

Cylinder

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 han-

dled 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 "9. (5) Refrigerant leak".

- 11 -

Page 21

[ 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 con-

fined area.

New Refrigerant (HFC type) Conventional Refrigerant (HFC type)

R410A R22

R32/R125 R22

Composition (wt%) (50/50) (100)

Type of Refrigerant Pseudo-azeotropic Refrigerant Single Refrigerant

Chloride Not included Included

Safety Class A1/A1 A1

Molecular Weight 72.6 86.5

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

Steam Pressure (25°C,MPa/77°F,psi) (gauge)

Saturated Steam Density (25°C,kg/m

/77°F,psi)

Flammability Nonflammable Nonflammable

Ozone Depletion Coefficient (ODP)

Global Warming Coefficient (GWP)

Refrigerant Charging Method Refrigerant charging in the liquid

Replenishment of Refrigerant after a Refrigerant Leak

1.557/226 0.94/136

64.0 44.4

0 0.055

1730 1700

Refrigerant charging in the gaseous

state

Available Available

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

is used as a reference

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)

-20/-4 0.30/44 0.14/20

0/32 0.70/102 0.40/58

20/68 1.34/194 0.81/117

40/104 2.31/335 1.44/209

60/140 3.73/541 2.33/338

65/149 4.17/605 2.60/377

R410A R22

MPa/psi MPa/psi

- 12 -

Page 22

[ 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

R410A Ester oil

2. Effects of contaminants

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

Sludge formation and ad-

Hydrolysis

Air infiltration Oxidization

Adhesion to expansion valve and capillary tubes

Dust, dirt

Infiltration of contaminants

Mineral oil etc.

Infiltration of contaminants into the compressor

Sludge formation and adhesion Clogged expansion valve and capillary tubes

Oil degradation Burn-in on the orbiting scroll

hesion Acid generation Oxidization Oil degradation

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

Poor cooling performance Compressor overheat

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

- 13 -

Page 23

- 14 -

Page 24

II Restrictions

[1] Types and Maximum allowable Length of Cables ...........................................................17

[2] Switch Settings and Address Settings .............................................................................18

[3] Sample System Connection ............................................................................................23

[4] An Example of a System to which an MA Remote Controller is connected .................... 24

[5] An Example of a System to which an M-NET Remote Controller is connected .............. 46

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

Controller are connected .................................................................................................50

[7] Restrictions on Pipe Length............................................................................................. 53

- 15 -

Page 25

- 16 -

Page 26

II Restrictions

[1] 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 the control cable 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 class-D grounding on the outdoor (heat source) unit.

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

5) Do not connect the terminal block for transmission line to supply voltage of 208V or 230V. Doing so will damage the electronic components on the terminal block.

6) Use 2-core shielded cables as control cables. (Marked with OK in the figure below) 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. (Marked with NO in the figure below)

[ II Restrictions ]

TB3

Heat source unit

TB7

2-core shielded cable

TB3

Heat source unit

TB7

Indoor unitIndoor unit

Multiple-core cable

Remote ControllerRemote Controller

NOOK

TB3

TB7

2-core shielded cable

TB3:Terminal block for transmission line connection TB7: Terminal block for transmission line for centralized control

(2) Control wiring

Different types of control wiring are used for different systems. Refer to section "[4] An Example of a System to which an MA Remote Controller is connected - [6] An Example of a Sys-

tem 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

Cable type

Maximum transmission line distance between the outdoor (heat source) unit and the farthest indoor unit

Maximum transmission line distance for centralized control and Indoor/ outdoor (heat source) transmission line (Maximum line distance via outdoor (heat source) unit)

Type Shielded cable CVVS, CPEVS, MVVS

Number of cores

Cable size Larger than 1.25mm

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

TB3

TB7

All facility types

2-core cable

[AWG16]

200 m [656ft] max.

- 17 -

Page 27

[ II Restrictions ]

2) Remote controller wiring

Cable type

Maximum overall line length

*1 MA remote controller refers to MA remote controller, MA deluxe remote controller, MA simple remote controller, and wireless remote controller. *2 M-NET remote controller refers to ME remote controller. *3 The use of cables that are smaller than 0.75mm *4 When connected to the terminal block on the Simple remote controller, use cables that meet the cable size specifications shown in the parenthesis.

Type

Number of cores

Cable size

MA remote controller

VCTF, VCTFK, CVV, CVS,

10m [32ft] or less

VVR, VVF, VCT

Shielded cable MVVS

2-core cable 2-core cable

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

0.3 to 1.25mm [AWG22 to 16]

2 *3

[AWG18 to 14]

200 m [656ft] max. 10 m [32ft] max.

(AWG18) is recommended for easy handling.

M-NET remote controller

When the cable length exceeds 10m [32ft]

1) Follow the same specifi-

2 *3

2 ) *4

cations for M-NET transmission lines.

The section of the cable that exceeds 10m [32ft] must be included in the maximum indoor-outdoor (heat source) transmission line distance.

[2] Switch Settings and Address Settings

1. Switch setting

The need for switch settings depends on the configuration of the system. Refer to section "[4] An Example of a System to which an MA Remote Controller is connected - [6] 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.

- 18 -

Page 28

2. Address settings

(1) Address settings table

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

[ II Restrictions ]

Unit or controller Address setting

Setting method Ad-

range

Indoor

Main/sub unit 0, 01 to 50

unit

LOSSNAY , OA processing unit

M-NET remote controller

Main remote controller

Sub remote controller

101 to 150 Add 100 to the smallest address of all the indoor units in

151 to 200

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.

the same group.

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

MA remote controller No address settings required. (The main/sub setting must be made if 2 re-

mote controllers are connected to the system.)

Outdoor (heat source) unit 0, 51 to

100

*1,*3,*4

Assign an address that equals the sum of the smallest address of the indoor units in the same refrigerant system and 50.

Auxiliary unit

BC controller (main)

0, 52 to 100

*3*4

Assign an address that equals the sum of the address of the outdoor (heat source) unit in the same refrigerant system and 1.

BC controller (sub)

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. If a sub BC controller is connected, auto-startup function will not be available.

System controller

System remote controller

ON/OFF remote controller

Schedule timer (compatible with

201 to 250 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.

M-NET)

Central controller G-50

0, 201 to 250 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 201 to 250 Assign an arbitrary but unique address within the range

listed on the left to each unit.

dress

setting

101

Main

201

202

000

247

*1 No address settings are required for units in a system with one outdoor (heat source) unit (with some exceptions).

Address setting is required if a sub BC controller is connected. *2 To set the M-NET remote controller address to "200", set it to "00". *3 To set the outdoor (heat source) unit or auxiliary unit address to "100", set it to "50". *4 If a given address overlaps any of the addresses that are assigned to other outdoor (heat source) units, use a dif-

ferent, unused address within the setting range (with some exceptions). *5 Some indoor units have 2 or 3 controller boards that require address settings.

(1) The address to be assigned to the No.1 controller board (by the power supply terminal block) must be 1 smaller

than that to the No.2 controller board.

(2) No. 2 controller board address must be equal to the sum of the No. 1 controller board address and 1, and the

No.3 controller board address must equal to the No. 1 controller address and 2.

- 19 -

Page 29

[ II Restrictions ]

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

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

System configuration

System with one outdoor (heat source) unit

System with multiple outdoor (heat source) units

Connection to the system controller

Power supply unit for transmission lines

Group operation of units in a system with multiple outdoor (heat source) units

_ _ _ Leave CN41 as it is

Not connected _ Not grouped

Grouped Disconnect the male con-

With connection to

Not required Grouped/not grouped the indoor unit system

With connection to the centralized control system

Not required

(Powered from the

outdoor (heat source)

Grouped/not grouped

unit)

Required Grouped/not grouped Leave CN41 as it is

Power supply switch connector connection

(Factory setting)

nector from the female power supply switch connector (CN41) and connect it to the female power supply switch connector (CN40) on only one of the outdoor (heat source)

units.

*Connect the S (shielded)

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

(Factory setting)

*1 The need for a power supply unit for transmission lines depends on the system configuration. *2 When connecting a system controller to the transmission line for centralized control or performing a group operation

of units in different refrigerant systems, the replacement of male power supply switch connector (CN41) must be performed only on one of the outdoor (heat source) units in the system.

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

System configuration Centralized control switch settings (SW2-1)

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

Connection to the system controller Connected

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

(4) Indoor unit port switch setting (R2 or WR2 series (factory setting: "0" ))

Make the setting for the port switch that corresponds to the connected BC (main/sub) controllers.

When more than two ports are used, make the setting on the port with a smaller port number. The total capacity and the number of connectable indoor units per port is 54 and below, and 3 respectively.

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

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.

- 20 -

Page 30

[ II Restrictions ]

(6) 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 plug

*2*3*4

Operation of the indoor unit when the operation is

resumed after the unit was stopped

Indoor unit will go into operation regardless of its oper-

Setting (SW1)

910

OFF ON ation status before power off (power failure). (In approx. 5 minutes)

Automatic restoration after power failure Indoor unit will go into operation if it was in operation

ON OFF 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 opera-

OFF OFF

tion status before power off (power failure).

*1. Requires that the dipswitch settings for all the units in the group be made.

*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

circuits will be turned on or off by the plug.

*4. Do not cut off power to the outdoor (heat source) unit. Cutting off the power supply to the outdoor (heat source) 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.

(7) 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.

(8) Various types of control using input-output signal connector on the outdoor (heat source) unit (various connection op-

tions)

Terminal

Type Usage Function

to be used

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

the outdoor (heat source) unit.

Compressor ON/OFF (level)

CN3D

*It can be used as the DEMAND control device for each system.

Performs a low level noise operation of the outdoor (heat source) unit by an external input to the outdoor (heat source) unit. (The unit can perform a NIGHT MODE operation under the following con-

NIGHT MODE or STEP DEMAND

(level) ditions: Outdoor air temperature below 30°C during cooling operation/Outdoor air temperature above 3°C during heating operation.)

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

Output How to extract signals from the outdoor (heat source) unit

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

Snow sensor signal

input (level)

Operation status of

the compressor

Error status

CN3S

CN51

*1. NIGHT MODE is valid when Dip SW4-7 on the outdoor (heat source) unit are set to OFF. When Dip SW4-7 are set

to ON, STEP DEMAND control is possible, using different configurations of NIGHT MODE input and compressor ON/ OFF input settings.

- 21 -

Page 31

[ II Restrictions ]

SW4-7:OFF (Compressor ON/OFF, NIGHT MODE)

CN3D 1-3P Compressor ON/OFF CN3D 1-2P NIGHT MODE

Open OFF Open OFF

Short-circuit ON Short-circuit ON

SW4-7:ON (STEP DEMAND)

Open 100% (not on the

CN3D 1-3P

Short-circuit 0% 50%

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.

(Wrong)

(Correct)

100%

CN3D 1-2P

Open Short-circuit

on-DEMAND control)

75%

50%

75%

Example of wiring connection

CN51

Remote controller board

Lamp power supply Relay power supply

Field-installed

L1 : Error indicator lamp/freeze prevention output L2 : Compressor operation display lamp X,Y : Relay (For 12V DC coil rating 0.9 W or below)

CN3D

Remote controller board

Field-installed

SW1 : NIGHT MODE command or Compressor ON/OFF SW2 : Compressor ON/OFF command X,Y Minimum applied load 1 mA or below)

Relay circuit

X Y

Maximum allowable wiring length = 10 m

SW1

SW2

Relay circuit

Maximum allowable wiring length = 10 m

Relay (Rated contact DC 15 V 0.1 A or above

Controller board on outdoor (heat source) unit

CN51

Controller board on outdoor (heat source) unit

CN3D

- 22 -

Page 32

[3] Sample System Connection

Examples of typical system connection are shown on pages [4] to [6].

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

Address start

up for indoor and outdoor

(heat source)

units

Automatic

address setup

Manual

address setup

Manual

address setup

Manual

address setup

Manual

address setup

Manual

address setup

configuration

System with one outdoor

1. (heat source)

System with one outdoor

2. (heat source)

Grouping of units in a system with mul-

3. tiple outdoor

(heat source)

System with

one outdoor

(heat source)

System with

one outdoor

(heat source)

System with

one outdoor

(heat source)

System

unit

units

unit

Connection to the

system controller

With connection to

transmission line for

centralized control

With connection to

transmission line for

centralized control

With connection to

indoor-outdoor

(heat source)

transmission line

O: Applicable, - : Non-applicable

Unit models

Y,WY

Series

R2,WR2

Series

O O [4] 1.

O O [4] 2.

O O [4] 3.

O O [4] 4.

- O [4] 5.

O O [4] 6.

[ II Restrictions ]

Pages Notes

Connection of multiple LOSSNAY units

Connection of multiple BC controllers

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

configuration

System with one

outdoor (heat

source) unit

System

Connection to the

system controller

With connection to

transmission line for

centralized control

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

System

configuration

System with one

outdoor (heat

source) unit

Connection to the

system controller

With connection to

transmission line for

centralized control

Address start

up for indoor and outdoor

(heat source)

units

Manual

address setup

Address start

up for indoor and outdoor

(heat source)

units

Manual

address setup

- 23 -

O: Applicable, - : Non-applicable

Unit models

Y,WY

Series

R2,WR2

Series

Pages Notes

O O [5] 1.

O: Applicable, - : Non-applicable

Unit models

Y,WY

Series

R2,WR2

Series

Pages Notes

OO [6]

Page 33

[ II Restrictions ]

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

1. System with one outdoor (heat source) unit (automatic address setup for both indoor and outdoor (heat source) units)

Sample control wiring

Interlock operation with

the ventilation unit

TB5

M1M2

In the case of Y or WY

TB7

M1M2

TB3

TB5

M1M2

L3 L4

GroupGroup

TB5

M1M2

In the case of R2 or WR2

TB7

M1M2

*1 BC and BS are found only in the R2 or WR2 system. When BS is connected to the system, automatic address setup is not available.

TB3

M1M2

L1 L2

*1 BC

TB02

M1M2

TB02

A1 B2

TB5

M1M2

S 12

A1 B2

Notes Maximum allowable length

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.A transmission booster must be connected to a system to which more than 26 indoor units including one or more indoor units of 72 model or above are connected. Neither a BC or BS can be connected on the TB3 side (expanded side) of the transmission booster.

4.Automatic address setup is not available if start-stop input (CN32, CN51, CN41) is used for a group operation of indoor units, or if a sub BC controller is connected to the system. Refer to "[4] 2. Manual address setup for both indoor and outdoor (heat source) units".

5.To connect more than 2 LOSSNAY units to indoor units in the same system, refer to the next section "[4] 2. An example of a system with one outdoor (heat source) unit to which 2 or more LOSSNAY units are connected".

A1 B2

L12 L13

A1 B2

(1) Indoor/outdoor (heat source) transmission line

Maximum distance (1.25mm

A1 B2

GroupGroup

TB5

M1M2

A1 B2

L11

0000

A1 B2

TB5

M1M2

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

*L1 is applicable only in the R2 or WR2 system.

(2) Transmission line for centralized control

No connection is required.

(3) MA remote controller wiring

Maximum overall line length

(0.3 to 1.25mm

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

When connected to the terminal block on the MA simple remote controller, use cables that meet the cable size specifications

0.75-1.25mm

[AWG18 to 14].

- 24 -

Page 34

[ II Restrictions ]

Wiring method/address setting method

1) Indoor/outdoor (heat source) transmission line Daisy-chain terminals M1 and M2 on the terminal block for indoor-outdoor (heat source) transmission line (TB3) on

the outdoor (heat source) unit (OC), terminals M1 and M2 of the terminal block for indoor-outdoor (heat source) transmission line (TB02) on the BC controller (BC), and terminals M1 and M2 on the terminal block for indoor-outdoor (heat source) transmission line (TB5) on each indoor unit (IC). (Non-polarized 2-core cable)

Only use shielded cables.

[Shielded cable connection]

To ground the shielded cable, daisy-chain the ground terminal ( )on the outdoor (heat source) unit (OC), S termi-

nals on the terminal block (TB3) on the terminal block (TB1) on the BC controller (BC), and the S terminal on the terminal block (TB5) on the indoor unit (IC).

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 2-core cable) MA remote controllers can be connected to the indoor units of type C or later. [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 to sub. (Refer to MA remote controller function selection (4 [3]2.) or the in-

stallation manual for the MA remote controller for the setting method.)

[Group operation of indoor units]

To perform a group operation of indoor units (IC), daisy-chain 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 remote controller. (Non-polarized 2-core cable) To perform a group operation of indoor units that have different functions, refer to [4] 2.

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 (heat source) transmission line (TB5) on LOSSNAY (LC). (Non-polarized 2core cable)

Interlock operation setting with all the indoor units in the same system will automatically be made. Refer to "[4] 2. Manual address setup for both indoor and outdoor (heat source) units" in the following cases: per-

forming an interlock operation of part of the indoor units in the system with a LOSSNAY unit, using LOSSNAY 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 indoor units in the same system.

5) Switch setting No address settings required.

Pro cedures

1 Indoor

2 LOSSNAY LC No settings

3MA

4 Outdoor (heat source)

5 Auxiliary

Unit or controller

unit

remote controller

unit

Main unit IC No settings

Sub unit IC

Main remote controller

Sub remote controller

BC controller

MA No settings

MA Sub

OC No settings

Address

setting

range

required.

remote controller

required.

Setting method Notes

- Port number setting is required by an R2 or WR2 system.

To perform a group opera-

tion of indoor units that have different functions, refer to [4] 2.

-00

-Main

Settings to be made according to the remote controller function selection

-00

Factory set-

ting

- 25 -

Page 35

[ II Restrictions ]

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

Sample control wiring

Interlock operation with

the ventilation unit

TB5

M1M2

In the case of Y or WY

TB7

M1M2

TB3

TB5

M1M2

L3 L4

GroupGroup

TB5

M1M2

Group

M1M2

TB5

A1 B2

S 12

A1 B2

In the case of R2 or WR2

TB7

M1M2

TB3

M1M2

L1 L2

*1 BC

TB02

M1M2

TB02

*1 BS

*1 BC and BS are found only in the R2 or WR2 system.

Notes Maximum allowable length

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.

A1 B2

L12 L13

M1M2

TB5

M1M2

*1 LC

0403

(1) Indoor/outdoor (heat source) transmission line

Same as [4] 1.

(2) Transmission line for centralized control

No connection is required.

(3) MA remote controller wiring

Same as [4] 1.

L11

- 26 -

Page 36

[ II Restrictions ]

Wiring method

1) Indoor/outdoor (heat source) transmission line Same as [4] 1.

[Shielded cable connection]

Same as [4] 1.

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

3) MA remote controller wiring Same as [4] 1.

[When 2 remote controllers are connected to the system]

Same as [4] 1.

[Group operation of indoor units]

Same as [4] 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 2-core cable)

Interlock setting between the indoor units and LOSSNAY units must be entered on the remote controller. (Refer to

"Entering the Interlock Settings into 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.

- 27 -

Page 37

[ II Restrictions ]

Wiring method/address setting method

Pro

ce-

du-

res

1 Indoor

2 LOSSNAY LC 01 to 50 Assign an arbitrary but unique ad-

3MA

4 Outdoor (heat

5 Auxiliary

Unit or controller

unit

remote controller

source) unit

unit

Main unit IC 01 to 50 Assign the smallest address to

Sub unit Assign sequential numbers start-

Main remote controller

Sub remote controller

BC controller (main)

BC controller (sub)

Address

setting

range

In an R2 or WR2 system with a

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

ing 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.)

dress to each of these units after assigning an address to all indoor units.

MA No

settings required.

MA Sub

remote controller

OC 51 to 100 The sum of the smallest address

BC 52 to 100 outdoor (heat source) unit address

BS Assign an address that equals the

Settings to be made according to the remote controller function selection

of the indoor units in the same system and 50

+ 1

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

Setting method Notes

the main unit in the group.

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

-Main

Port number setting is

required by an R2 or WR2 system.

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.

To set the address to

100, set it to 50.

If a given address over-

laps any of the addresses that are assigned to the outdoor (heat source) 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

- 28 -

Page 38

[ II Restrictions ]

- 29 -

Page 39

[ II Restrictions ]

3. Group operation of units in a system with multiple outdoor (heat source) units

Sample control wiring

Interlock operation with the ventilation unit

In the case of R2 or WR2

CN41 CN40 Replace

M1M2

Connect

TB7

M1M2

TB3

L1 L2

*1 BC

TB02

M1M2

TB02

L31

In the case of R2 or WR2

Leave the male connector on CN41 as it is.

L21 L22

TB3

TB7

M1M2

*1 BS

*1 BC

M1M2

*1 BC and BS are found only in the R2 or WR2 system.

In the case of Y or WY

CN41 CN40

Replac

TB7

M1M2

Connect

In the case of Y or WY

Leave the male connector on CN41 as it is.

TB7

M1M2

TB3

M1M2

L22

TB3

M1M2

TB5

S 12

A1 B2

L3 L4

GroupGroup

TB5

M1M2

L23 L24

Group

0302

TB5

M1M2

12 12

A1 B2

TB5

M1M2

TB5 TB15

M1M2

A1 B2

Notes Maximum allowable length

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 (heat source) units with each other.

4.Replacement of male power supply switch connector (CN41) must be performed only on one of the outdoor (heat source) units.

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

6.A transmission booster must be connected to a system to which more than 26 indoor units including one or more indoor units of 72 model or above are connected. Neither a BC or BS can be connected on the TB3 side (expanded side) of the transmission booster.

(1) Indoor/outdoor (heat source) transmission line

Maximum distance (1.25mm

[AWG16] or larger) (L1)* +L2+L3+L4 200m [656ft] (L21)* +L22+L23+L24 200m [656ft]

*L1 and L21 are applicable only in the R2 or WR2 system.

(2) Transmission line for centralized control

Maximum line distance via outdoor (heat source) unit

(1.25mm

[AWG16] or larger)

(L1)* +L2+L3+L4+L31

+(L21)* +L22+L23+L24 500m [1640ft] *L1 and L21 are applicable only in the R2 or WR2 system.

(3) MA remote controller wiring

Same as [4] 1.

- 30 -

Page 40

[ II Restrictions ]

Wiring method

1) Indoor/outdoor (heat source) transmission line Daisy-chain terminals M1 and M2 on the terminal block for indoor-outdoor (heat source) transmission line (TB3) on

the outdoor (heat source) unit (OC), terminals M1 and M2 of the terminal block for indoor-outdoor (heat source) transmission line (TB02) on the BC controller (BC and BS), and terminals M1 and M2 on the terminal block for indoor-outdoor (heat source) transmission line (TB5) on each indoor unit (IC). (Non-polarized 2-core cable)

Only use shielded cables.

[Shielded cable connection]

Same as [4] 1.

2) Transmission line for centralized control Daisy-chain terminals M1 and M2 on the terminal block for centralized control transmission line (TB7). Disconnect

the male connector on the controller board from the female power supply switch connector (CN41), and connect it to the female power supply switch connector (CN40).

Only use shielded cables.

[Shielded cable connection]

To ground the shielded cable, daisy-chain the S-terminals on the terminal block (TB7) on each of the outdoor (heat

source) units. Connect the S (shielded) terminal on the terminal block (TB7) on the outdoor (heat source) unit whose CN41 was replaced with CN40 to the ground terminal ( ) on the electric box.

3) MA remote controller wiring Same as [4] 1.

[When 2 remote controllers are connected to the system]

Same as [4] 1.

[Group operation of indoor units]

Same as [4] 1.

4) LOSSNAY connection Same as [4] 2.

5) Switch setting

Address setting is required as shown on the next page.

- 31 -

Page 41

[ II Restrictions ]

Address setting method

Pro

cedures

1 Indoor

2 LOSSNAY LC 01 to 50 Assign an arbitrary but unique ad-

3MA

4 Outdoor (heat

5 Auxiliary

Unit or controller

unit

remote controller

source) unit

unit

Main unit IC 01 to 50 Assign the smallest address to the

Sub unit Assign sequential numbers starting

Main remote controller

Sub remote controller

BC controller (main)

BC controller (sub)

Address

setting

range

main unit in the group.

In an R2 or WR2 system with a sub

BC controller, make the settings for the indoor units in the following order. (i) Indoor unit to be connected to

(ii) Indoor unit to be connected to

(iii) Indoor unit to be connected to

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

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.)

dress to each of these units after assigning an address to all indoor units.

MA No

settings required.

MA Sub

remote controller

OC 51 to 100 The sum of the smallest address of

BC 52 to 100 Outdoor (heat source) unit address

BS Assign an address that equals the

Settings to be made according to the remote controller function selection

the indoor units in the same system and 50

+ 1

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

Setting method Notes

the main BC controller

sub BC controller 1

sub BC controller 2

-Main

Port number setting is required by an R2 or WR2 system.

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

To set the address to 100, set it to 50.

To set the address to

100, set it to 50.

If a given address over-

laps any of the addresses that are assigned to the outdoor (heat source) 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

- 32 -

Page 42

[ II Restrictions ]

- 33 -

Page 43

[ II Restrictions ]

4. An example of a system in which a system controller is connected to the transmission line for centralized control

Sample control wiring

Interlock operation with the ventilation unit

In the case of R2 or WR2

CN41 CN40 Replace

SW2-1 OFF ON

Note1

TB7

M1M2

Connect

M1M2

TB3

L1 L2

*1 BC

TB02

M1M2

TB02

In the case of R2 or WR2

Leave the male connector on CN41 as it is.

SW2-1 OFF ON

Note1

TB3

TB7

M1M2

*1 BS

L21 L22

*1 BC

M1M2

TB02

L31

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 208/230V.

In the case of Y or WY

CN41 CN40 Replace

SW2-1 OFF ON

Note1

TB7

M1M2

Connect

In the case of Y or WY

Leave the male connector on CN41 as it is.

SW2-1 OFF ON

Note1

TB7

M1M2

L32

TB3

M1M2

L22

TB3

M1M2

System controller

M1M2

Note2

L3 L4

Group

TB5

M1M2

Group

A1 B2

Group

TB5

M1M2

A1 B2

L23 L24

0403

TB5

M1M2

S 12

A1 B2

*1 BC and BS are found only in the R2 or WR2 system.

M1M2

TB5

M1M2

TB5

Notes Maximum allowable length

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 (heat source) units with each other.

4.Replacement of male power supply switch connector (CN41) must be performed only on one of the outdoor (heat source) units.

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

(1) Indoor/outdoor (heat source) transmission line

Same as [4] 3.

(2) Transmission line for centralized control

Maximum line distance via outdoor (heat source) unit

(1.25mm

[AWG16] or larger) L32+L31+(L1)* +L2+L3+L4 500m [1640ft] L32+(L21)* +L22+L23+L24 500m [1640ft] L1+L2+L3+L4+L31

+(L21)* +L22+L23+L24 500m [1640ft] *L1 and L21 are applicable only in the R2 or WR2 system.

(3) MA remote controller wiring

Same as [4] 1.

- 34 -

Page 44

[ II Restrictions ]

Wiring method

1) Indoor/outdoor (heat source) transmission line Same as [4] 3.

[Shielded cable connection]

Same as [4] 1.

2) Transmission line for centralized control Daisy-chain terminals M1 and M2 on the terminal block for transmission line for centralized control (TB7) on each out-

door (heat source) unit (OC). Disconnect the male connector on the controller board from the female power supply switch connector (CN41), and connect it to the female power supply switch connector (CN40) on only one of the outdoor (heat source) units (OC). Set the central control switch (SW2-1) on the controller board on all OC to ON.

Only use shielded cables.

[Shielded cable connection]

Same as [4] 3.

3) MA remote controller wiring Same as [4] 1.

[When 2 remote controllers are connected to the system]

Same as [4] 1.

[Group operation of indoor units]

Same as [4] 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 (heat source) transmission line (TB5) on LOSSNAY (LC). (Non-polarized 2-core cable)

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 shown on the next page.

- 35 -

Page 45

[ II Restrictions ]

Address setting method

Pro

ce-

du-

res

1 Indoor

2 LOSSNAY LC 01 to 50 Assign an arbitrary but unique ad-

3MA

4 Outdoor (heat

5 Auxiliary

Unit or controller

unit

remote controller

source) unit

unit

Main unit IC 01 to 50 Assign the smallest address to

Sub unit Assign sequential numbers start-

Main remote controller

Sub remote controller

BC controller (main)

BC controller (sub)

Address

setting

range

In an R2 or WR2 system with a

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

ing 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.)

dress to each of these units after assigning an address to all indoor units.

MA No

settings required.

MA Sub

remote controller

OC 51 to 100 The sum of the smallest address of

BC 52 to 100 Outdoor unit (heat source) ad-

BS Assign an address that equals the

Settings to be made according to the remote controller function selection

the indoor units in the same system and 50

dress + 1

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

Setting method Notes

the main unit in the group.

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

- Enter the same indoor

Port number setting is required by an R2 or WR2 system.

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

unit group settings on the system controller as the ones that were entered on the MA remote controller.

To set the address to 100, set it to 50.

To set the address to

100, set it to 50.

If a given address

overlaps any of the address that are assigned to the outdoor (heat source) 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

Main

- 36 -

Page 46

[ II Restrictions ]

- 37 -

Page 47

[ II Restrictions ]

5. An example of an R2 or WR2 system to which multiple BC controllers are connected (a system in which a system controller is connected to the transmission line for centralized control).

Sample control wiring

CN41 CN40 Replace SW2-1 OFF ON

M1M2

Connect

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

L31

M1M2

TB3

TB7

M1M2

L21

TB3

TB7

M1M2

1 1 2 1 222 12

52 57

TB5

TB02

M1M2 S

M1M2

L22

Group Group

1 1 2 4 4323 4

54 59

TB5

TB02

M1M2

A1 B2

TB5

M1M2

L23 L24 L25

0503

TB5

S 12

M1M2

GroupGroup

M1M2

TB5

A1 B2

M1M2

TB5

M1M2

TB02

L6L5 L7

Group

TB5

M1M2

A1 B2

L26 L27

Group

TB5

M1M2

TB02

M1M2

L9 L10

Group

1 212

TB5

M1M2

A1 B2

M1M2

TB5

A1 B2

L32

System controller

M1M2

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

A1 B2

*2 LM adapters require the power supply capacity of single-phase AC 208/230V.

Notes Maximum allowable length

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 (heat source) units with each other.

4.Replacement of male power supply switch connector (CN41) must be performed only on one of the outdoor (heat source) units.

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

A1 B2

(1) Indoor/outdoor (heat source) transmission line

Maximum distance (1.25mm

Numbers in the indicate port numbers.

Connection to BC controllers

[AWG16] or larger) L1+L2+L3+L4+L5+L6+L7+L8+L9+L10 200m [656ft] L21+L22+L23+L24+L25+L26+L27 200m [656ft]

(2) Transmission line for centralized control

Maximum line distance via outdoor (heat source) unit

(1.25mm

[AWG16] or larger)

L32+L31+L1+L2+L3+L4

+L5+L6+L7+L8+L9+L10 500m [1640ft] L32+L21+L22+L23+L24+L25+L26+L27 500m [1640ft] L1+L2+L3+L4+L5+L6+L7+L8+L9+L10+L31

+L21+L22+L23+L24+L25+L26+L27 500m [1640ft]

(3) MA remote controller wiring

Same as [4] 1.

- 38 -

Page 48

[ II Restrictions ]

Wiring method

1) Indoor/outdoor (heat source) transmission line Daisy-chain terminals M1 and M2 on the terminal block for indoor-outdoor (heat source) transmission line (TB3) on

the outdoor (heat source) unit (OC), terminals M1 and M2 of the terminal block for indoor-outdoor (heat source) transmission line (TB02) on the main BC controller (BC) and the sub BC controller (BS), and terminals M1 and M2 on the terminal block for indoor-outdoor (heat source) transmission line (TB5) on each indoor unit (IC). (Non-polarized 2core cable)

Only use shielded cables.

[Shielded cable connection]

Same as [4] 1.

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

[Shielded cable connection]

Same as [4] 3.

3) MA remote controller wiring Same as [4] 1.

[When 2 remote controllers are connected to the system]

Same as [4] 1.

[Group operation of indoor units]

Same as [4] 1.

4) LOSSNAY connection Same as [4] 4.

5) Switch setting Address setting is required as shown on the next page.

- 39 -

Page 49

[ II Restrictions ]

Address setting method

Pro cedures

1 Indoor

2 LOSSNAY LC 01 to 50 Assign an arbitrary but unique ad-

3MA

4 Outdoor (heat

5 Auxiliary

Unit or controller

unit

remote controller

source) unit

unit

Main unit IC 01 to 50 Assign the smallest address to

Sub unit Assign sequential numbers starting

Main remote controller

Sub remote controller

BC controller (main)

BC controller (sub)

Address

setting

range

In an R2 or WR2 system with a

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

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.)

dress to each of these units after assigning an address to all indoor units.

MA No

settings required.

MA Sub

remote controller

OC 51 to 100 The sum of the smallest address of

BC 52 to 100 Outdoor (heat source) unit address

BS 51 to 100 Assign an address that equals the

Settings to be made according to the remote controller function selection

the indoor units in the same system and 50

+ 1

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

Setting method Notes

the main unit in the group.

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

- Enter the same indoor

Port number setting is required by an R2 or WR2 system.

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

unit group settings on the system controller as the ones that were entered on the MA remote controller.

To set the address to 100, set it to 50.

To set the address to

100, set it to 50.

If address that is as-

signed to the main BC controller overlaps any of the addresses that are assigned to the outdoor (heat source) 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

Main

- 40 -

Page 50

[ II Restrictions ]

- 41 -

Page 51

[ II Restrictions ]

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

Sample control wiring

Interlock operation with

the ventilation unit

TB5

M1M2

In the case of R2 or WR2

CN41 CN40 Replace SW2-1 OFF ON

TB3

TB7

M1M2

L1 L2

*1 BC

TB02

M1M2

In the case of Y or WY

CN41 CN40 Replace SW2-1 OFF ON

M1M2

TB7

TB3

Group

TB5

M1M2

L3 L4

Group

TB5

M1M2

Connect

M1M2

TB02

Connect

TB02

L31

In the case of Y or WY

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

TB3

TB7

M1M2

In the case of R2 or WR2

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

L21 L22

TB3

TB7

M1M2

*1 BS

*1 BC

M1M2

NO NO

L25

*1 BC and BS are found only in the R2 or WR2 system.

System controller

M1M2

Notes Maximum allowable length

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 (heat source) units with each other.

4. Replacement of male power supply switch connector (CN41) must be performed only on one of the outdoor (heat source) units.

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

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

7. When the total number of indoor units exceeds 26, it may not be possible to connect a system controller on the indoor-outdoor (heat source) transmission line.

8. In a system to which more than 18 indoor units including one or more indoor units of 72 model or above are connected, there may be cases in which the system controller cannot be connected to the indoor-outdoor (heat source) transmission line. Neither a BC or BS can be connected on the TB3 side (expanded side) of the transmission booster.

A1 B2

L22

Group

TB5

M1M2

S 12

Note1

A1 B2

(1) Indoor/outdoor (heat source) transmission line

Maximum distance (1.25mm (L1)* +L2+L3+L4 200m [656ft] (L21)* +L22+L23+L24 200m [656ft] L25 200m [656ft]

*L1 and L21 are applicable only in the R2 or WR2 system.

(2) Transmission line for centralized control

Maximum line distance via outdoor (heat source) unit

(1.25mm L25+L31+(L1)* +L2+L3+L4 500m [1640ft] (L1)* +L2+L3+L4+L31

+(21)* +L22+L23+L24 500m [1640ft]

*L1 and L21 are applicable only in the R2 or WR2 system.

(3) MA remote controller wiring

Same as [4] 1.

L23 L24

0403

TB5

[AWG16] or larger)

M1M2

Note1 LM adapters cannot be connected to the

indoor-outdoor transmission line.

TB5

M1M2

[AWG16] or larger)

- 42 -

Page 52

[ II Restrictions ]

Wiring method

1) Indoor/outdoor (heat source) transmission line Daisy-chain terminals M1 and M2 on the terminal block for indoor-outdoor (heat source) transmission line (TB3)

on the outdoor (heat source) unit (OC), terminals M1 and M2 of the terminal block for indoor-outdoor (heat source) transmission line (TB02) on the BC controller (BC and BS), terminals M1 and M2 on the terminal block for indoor-outdoor (heat source) transmission line (TB5) on each indoor unit (IC), and terminals M1 and M2 on the system controller. (Non-polarized 2-core cable)

Only use shielded cables.

[Shielded cable connection]

To ground the shielded cable, daisy-chain the ground terminal on the outdoor (heat source) unit and on the ter-

minal block (TB1) on the BC and BC, the S terminal on the terminal block (TB5) on the indoor unit, and the S terminal on the system controller.

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

[Shielded cable connection]

Same as [4] 3.

3) MA remote controller wiring Same as [4] 1.

[When 2 remote controllers are connected to the system]

Same as [4] 1.

[Group operation of indoor units]

Same as [4] 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 (heat source) transmission line (TB5) on LOSSNAY (LC). (Non-polarized 2-core cable)

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 shown on the next page.

- 43 -

Page 53

[ II Restrictions ]

Address setting method

Pro cedures

1 Indoor

2 LOSSNAY LC 01 to 50 Assign an arbitrary but unique ad-

3MA

4 Outdoor (heat

5 Auxiliary

Unit or controller

unit

remote controller

source) unit

unit

Main unit IC 01 to 50 Assign the smallest address to

Sub unit Assign sequential numbers start-

Main remote controller

Sub remote controller

BC controller (main)

BC controller (sub)

MA No

MA Sub

OC 51 to 100 The sum of the smallest address

BC 52 to 100 Outdoor unit (heat source) ad-

BS Assign an address that equals the

Address

setting

range

settings required.

remote controller

Setting method Notes

the main unit in the group.

In an R2 or WR2 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.

ing 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.)

dress to each of these units after assigning an address to all indoor units.

- Enter the same indoor

Settings to be made according to the remote controller function selection

of the indoor units in the same system and 50

dress + 1

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

Port number setting is required by an R2 or WR2 system.

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

unit group settings on the system controller as the ones that were entered on the MA remote controller.

To set the address to 100, set it to 50.

To set the address to

100, set it to 50.

If a given address

overlaps any of the addresses that are assigned to the outdoor (heat source) 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.

Facto-

ry set-

ting

Main

- 44 -

Page 54

[ II Restrictions ]

- 45 -

Page 55

[ II Restrictions ]

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

1. An example of a system in which a system controller is connected to the transmission line for central control

Sample control wiring

In the case of R2 or WR2

CN41 CN40 Replace

SW2-1 OFF ON

Note1

TB7

M1M2

Connect

TB3

M1M2

L1 L2

*1 BC

TB02

M1M2

TB02

In the case of R2 or WR2

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

Note1

L21 L22

TB3

TB7

M1M2

*1 BS

*1 BC

TB02

M1M2

L31

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 208/230V.

In the case of Y or WY

CN41 CN40 Replace

SW2-1 OFF ON

Note1

M1M2

Connect

In the case of Y or WY

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

L32

Note1

M1M2

TB3

TB7

M1M2

TB3

TB7

M1M2

System controller

M1M2

Note2

L22

TB5

M1M2

A1 B2

101

L3 L4

GroupGroup

L23 L24

Group

TB5

M1M2

A1 B2

102

0403

TB5

M1M2

S 12

A1 B2

153

*1 BC and BS are found only in the R2 or WR2 system.

A1 B2

103

TB5

M1M2

Interlock operation with the ventilation unit

TB5

M1M2

TB5

M1M2

Notes Maximum allowable length

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 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 (heat source) units with each other.

4. When connecting a system controller to the transmission line for centralized control or performing a group operation of units in a system with multiple outdoor (heat source) units, the replacement of male power supply switch connector (CN41) with CN40 must be performed only on one of the outdoor (heat source) units in the system.

5. Connect the S (shielded) terminal of the terminal block for transmission line for centralized control (TB7) on the outdoor (heat source) unit whose male connector of the CN41 was plugged into CN40 to the ground terminal ( ) on the unit.

6. A transmission booster must be connected to a system in which the total number of connected indoor units exceeds 20 (19 with one BC, 18 with one BC and BS each).

7. A transmission booster must be connected to a system to which more than 16 indoor units (15 with one BC, 14 with one BC and BS each) including one or more indoor units of 72 model or above are connected. Neither a BC or BS can be connected on the TB3 side (expanded side) of the transmission booster.

- 46 -

(1) Indoor/outdoor (heat source) transmission line

Same as [4] 3.

(2) Transmission line for centralized control

Same as [4] 4.

(3) M-NET remote controller wiring

Maximum overall line length

(0.3 to 1.25mm

[AWG22 to 16]) m1 10m [32ft] m2+m3 10m [32ft] If the standard-supplied cable must be extend-

ed, use a cable with a diameter of 1.25mm

[AWG16]. The section of the cable that exceeds 10m [32ft] must be included in the maximum indoor-outdoor (heat source) transmission line distance described in (1).

Page 56

[ II Restrictions ]

Wiring method

1) Indoor/outdoor (heat source) transmission line Same as [4] 3.

[Shielded cable connection]

Same as [4] 1.

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

[Shielded cable connection]

Same as [4] 3.

3) M-NET remote controller wiring Connect terminals M1 and M2 on the terminal block for indoor-outdoor (heat source) transmission line (TB5) on

the indoor units (IC) to appropriate terminals on the terminal block on M-NET remote controller (RC). (Non-polarized 2-core cable)

[When 2 remote controllers are connected to the system]

When 2 remote controllers are connected to the system, connect terminals M1 and M2 of the terminal block on the

IC (TB5) to the terminal block on the two RC remote controllers.

[Group operation of indoor units]

To perform a group operation of indoor units, connect terminals M1 and M2 on the terminal block (TB5) on the main

indoor unit in the group, to the terminal block on the M-NET remote controller. (Non-polarized 2-core cable)

M-NET remote controller is connectable anywhere on the indoor-outdoor (heat source) transmission line. To perform a group operation of indoor units that have different functions, set the indoor unit in the group with the

greatest number of functions as the main unit.

4) LOSSNAY connection Same as [4] 4.

5) Switch setting Address setting is required as shown on the next page.

- 47 -

Page 57

[ II Restrictions ]

Address setting method

Pro

ce-

du-

res

1 Indoor

2 LOSSNAY LC 01 to 50 Assign an arbitrary but unique

3M-NET

4 Outdoor (heat

5 Auxiliary

Unit or controller

unit

remote controller

source) unit

unit

Main unit IC 01 to 50 Assign the smallest address to

Sub unit Assign sequential numbers start-

Main remote controller

Sub remote controller

BC controller (main)

BC controller (sub)

Address

setting

range

In an R2 or WR2 system with a

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

ing 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.)

address to each of these units after assigning an address to all indoor units.

RC 101 to

150

RC 151 to

200

OC 51 to 100 The sum of the smallest address

BC 52 to 100 Outdoor (heat source) unit ad-

BS Assign an address that equals

Add 100 to the main unit address in the group

Add 150 to the main unit address in the group

of the indoor units in the same system and 50

dress + 1

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

Setting method Notes

the main unit in the group.

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

Enter the indoor unit

group settings on the system controller (MELANS).

Port number setting is

required by an R2 or WR2 system.

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 it to 00.

To set the address to 100, set it to 50.

To set the address to

100, set it to 50.

If address that is as-

The use of a sub BC

controller requires the connection of a main BC controller.

Factory set-

ting

101

- 48 -

Page 58

[ II Restrictions ]

- 49 -

Page 59

[ II Restrictions ]

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

Sample control wiring

In the case of R2 or WR2

CN41 CN40 Replace

SW2-1 OFF ON

Note1

L1 L2

TB3

TB7

M1M2

Connect

*1 BC

M1M2

TB02

In the case of Y or WY

CN41 CN40 Replace

SW2-1 OFF ON

TB02

L31

In the case of Y or WY

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

In the case of R2 or WR2

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

Note1

L21 L22

TB3

TB7

M1M2

*1 BS

*1 BC

M1M2

NO NO

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 208/230V.

L32

M1M2

Connect

Note1

M1M2

Note1

TB3

TB7

M1M2

L22

TB3

TB7

M1M2

System controller

M1M2

L3 L4

GroupGroup

TB5

M1M2

A1 B2

L23 L24

Group Group

TB5

M1M2

0503

TB5

M1M2

S 12

A1 B2

Note2

*1 BC and BS are found only in the R2 or WR2 system.

TB5

M1M2

A1 B2

105

TB5

M1M2

TB5

M1M2

A1 B2

104

Notes Maximum allowable length

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

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

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

6. Replacement of male power supply switch connector (CN41) must be performed only on one of the outdoor (heat source) units.

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

8. A transmission booster must be connected to a system in which the total number of connected indoor units exceeds 20 (19 with one BC, 18 with one BC and BS each).

9. A transmission booster must be connected to a system to which more than 16 indoor units (15 with one BC, 14 with one BC and BS each) including one or more indoor units of 72 model or above are connected. Neither a BC or BS can be connected on the TB3 side (expanded side) of the transmission booster.

(1) Indoor/outdoor (heat source) transmission line

Same as [4] 3.

(2) Transmission line for centralized control

Same as [4] 4.

(3) MA remote controller wiring

Same as [4] 1.

(4) M-NET remote controller wiring

Same as [4] 1.

- 50 -

Page 60

Wiring method/address setting method

1) Indoor/outdoor (heat source) transmission line Same as [4] 3.

[Shielded cable connection]

Same as [4] 1.

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

[Shielded cable connection]

Same as [4] 3.

3) MA remote controller wiring Same as [4] 1.

[When 2 remote controllers are connected to the system]

Same as [4] 1.

[Group operation of indoor units]

Same as [4] 1.

4) M-NET remote controller wiring Same as [4] 1.

[When 2 remote controllers are connected to the system]

Same as [4] 1.

[Group operation of indoor units]

Same as [4] 1.

5) LOSSNAY connection Same as [4] 4.

6) Switch setting Address setting is required as shown on the next page.

[ II Restrictions ]

Pro

ce-

du-

res

1 Opera-

tion with the MA remote controller

Unit or controller

Indoor unit

Main unit

Sub unit

MA remote controller

Main remote controller

Sub remote controller

Address

setting

range

IC 01 to 50

MA No

settings required.

MA Sub

remote controller

Setting method Notes

Assign the smallest address to

the main unit in the group.

In an R2 or WR2 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.)

Settings to be made according to the remote controller function selection

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

Port number setting is

required by an R2 or WR2 system.

Factory set-

ting

Main

- 51 -

Page 61

[ II Restrictions ]

Wiring method/address setting method

Pro

ce-

du-

res

2 Opera-

tion with

Unit or controller

Indoor unit

Main unit

Address

setting

range

IC 01 to 50

the M-NET remote controller

Sub unit

M-NET remote controller

Main remote controller

Sub

RC 101 to 150

RC 151 to 200 remote controller

3 LOSSNAY LC 01 to 50

4 Outdoor (heat source) unit OC 51 to 100

5 Auxilia-

ry unit

BC controller (main)

BC controller

BC 52 to 100

(sub)

Setting method Notes

After assigning an address to all

indoor units to be controlled from the MA remote controller, assign the smallest address to the main indoor unit in the group.

In an R2 or WR2 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.)

Add 100 to the main unit address in the group.

Add 150 to the main unit address in the group.

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

The sum of the smallest address of the indoor units in the same system and 50

Outdoor (heat source) unit address + 1

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.

Enter the indoor unit

group settings on the system controller (MELANS).

Port number setting is

required by an R2 or WR2 system.

It is not necessary to set

the 100s digit.

To set the address to

200, set it to 00.

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

To set the address to 100, set it to 50.

To set the address to

100, set it to 50.

If a given address over-

laps any of the addresses that are assigned to the outdoor (heat source) 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

101

- 52 -

Page 62

[ II Restrictions ]

[7] Restrictions on Pipe Length

The refrigerant pipe from the outdoor (heat source) unit is branched at the pipe end, and each branch is then connected to an indoor unit. Flare connections are used for the pipes on the indoor units and for the liquid pipes on the outdoor (heat source) units. Flange connections are used for gas pipes on the outdoor (heat source) units. Branched sections are brazed together.

WARNING

Do not let refrigerant (R410A) leak in the presence of an open flame or other heat source. When exposed to an open flame or other heat source, refrigerant will break down, generate poisonous gas, and pose a risk of gas poisoning. Do not weld in a confined space. Perform an air tightness test at the completion of pipe work.

CAUTION

Do not use the existing refrigerant piping.

A large amount of chlorine that may be contained in the residual refrigerant and refrigerating machine oil in the existing piping may cause the refrigerating machine oil in the new unit to deteriorate.

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

Only use the type of refrigerant (R410A) 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.

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.

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.

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.

- 53 -

Page 63

[ II Restrictions ]

1. PQHY

(1) Line branching

Length Total pipe length A+B+C+D

Height difference

Heat source unit

To downstream units

Note : "Total sum of downstream unit model numbers" in the table is the sum of the model numbers of the units after point A in the figure.

Indoor

+a+b+c+d+e

A+B+C+D+e 150 [492] or less

B+C+D+e 40 [131] or less

H 50 [164] or less

H' 40 [131] or less

Unit: m [ft]

Allowable length of

pipes

300 [984] or less

First branch

BCD

Indoor

Indoor Indoor Indoor

Operation Pipe sections

Total pipe length (L) from the heat source unit to the farthest indoor unit

Total pipe length from the first branch to the farthest indoor unit ( )

Between indoor and heat source units

Heat source unit above indoor unit

Heat source unit below indoor unit

Between indoor units h 15 [49] or less

- 54 -

Page 64

(2) Header branching

[ II Restrictions ]

Heat source unit

Note:Pipes from the header may not be re-branched.

First branch

Indoor Indoor

Indoor Indoor Indoor

cap

Indoor

Unit: m [ft]

Operation Pipe sections

Allowable length of

pipes

Length Total pipe length A+a+b+c+d+e+f 300 [984] or less

Total pipe length (L) from the heat source unit to

A+f 150 [492] or less

the farthest indoor unit

Total pipe length from the first branch to the far-

f 40 [131] or less

thest indoor unit ( )

Height difference

Between indoor and heat source units

Heat source unit above indoor unit

Heat source unit below

H 50 [164] or less

H' 40 [131] or less

indoor unit

Between indoor units h 15 [49] or less

- 55 -

Page 65

[ II Restrictions ]

(3) A combination of line and header branching

Heat source unit

Note : "Total sum of downstream unit model numbers"

First branch (Branch joint)

Branch joint

Indoor

Indoor Indoor Indoor

Operation Pipe sections

Length Total pipe length A+B+C

Total pipe length (L) from the heat source unit to the farthest indoor unit

Total pipe length from the first branch to the farthest indoor unit ( )

Height difference

Between indoor and heat source units

Heat source unit above indoor unit

Heat source unit below indoor unit

Between indoor units h 15 [49] or less

in the table is the sum of the model numbers of the units after point A in the figure.

Branch header

Note : Pipes from the header may not be

cap

re-branched.

Indoor

+a+b+c+d+e

A+B+b 150 [492] or less

B+b 40 [131] or less

H 50 [164] or less

H' 40 [131] or less

To downstream units

Unit: m [ft]

Allowable length of

pipes

300 [984] or less

- 56 -

Page 66

2. PQRY

(1) Line branching

System that requires 16 BC controller ports or fewer <System with only the main BC controller or standard BC controller>

Heat source unit

110 m [360ft] or less

BC controller

[ II Restrictions ]

40 m [131ft] or less

Indoor unit

h1=15 m [49ft] or less

Junction pipe

H=50 m [164ft] or less (Heat source unit below indoor unit)

H'=40 m [131ft] or less (Heat source unit below indoor unit)

(Optional accessory)

h2=15 m [49ft] or less

(P161-P280 models: 2 ports merged with a junction pipe)

Branch joint (For use with the Y series) CMY-Y102S-G

Indoor unit

Maximum of 3 units per port Total capacity of P160 or below (All units connected to the same port must be in the same operating mode)

Indoor unit

Operation Pipe sections Allowable length of pipes

Length Total pipe length A+B+a+b+c+d+e 300 [984] or less

Total pipe length from the heat source unit to the farthest indoor unit

A+e 150 [492] or less

(Equivalent length 175 [574] or less)

Between heat source unit and BC controller A 110 [360] or less

Between BC controller and indoor unit e 40 [131] or less

Height difference

Between indoor and heat source units

Heat source unit above indoor unit

Heat source unit below

H 50 [164] or less

H' 40 [131] or less

indoor unit

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

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

Unit: m [ft]

*1. When the aggregate length of all pipes exceeds 300m [984ft], observe the restrictions in the figure titled "Restrictions

on pipe length" below.

*2. 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)

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

* In the system to which indoor units of P72 model or above are connected, neither a branch joint nor a branch header

may be used.

* Do not connect the P72 or P96 models of indoor units with other models of indoor units to the same port.

Restrictions on pipe length

400[1312]

350[1148]

300[984]

250[820]

200[656]

Aggregate length of all pipes (m[ft])

[98]40[131]50[164]60[196]70[229]80[262]90[295]

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

100

[328]

110

[360]

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

70[229]

60[196]

50[164]

40[131]

30[98]

20[65]

10[32]

Pipe length between main BC

controller and farthest indoor unit (m[ft])

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

[16]

[32]

[49]

- 57 -

Page 67

[ II Restrictions ]

(2) Line branching

System that requires more than 16 BC controller ports or with multiple BC controllers <System with both main and sub BC controllers>

Heat source unit

110 m [360ft] or less

BC controller

main unit

Indoor unit

Note1)

Indoor unit

BC controller

sub unit

40 m [131ft] or less

Indoor unit

h1=15m [49ft] or less

Junction pipe

H=50 m [164ft] or less(Heat source unit above indoor unit)

H'=40 m [131ft] or less(Heat source unit below indoor unit)

Note1) When connecting 2 sub BC controllers to a system, install them in parallel.

(Optional accessory)

h2=15m [49ft] or less

Indoor unit

(P161 - P280 models: 2 ports merged with a junction pipe)

Branch joint (For use with the Y series) CMY-Y102S-G

Maximum of 3 units per port Total capacity of P160 or below (All units connected to the same port must be in the same operating mode)

Indoor unitIndoor unit

Indoor unit

Unit: m [ft]

Operation Pipe sections Allowable length of pipes

Length Total pipe length A+B+C

300 [984] or less

+a+b+c+d+e+f+g

Total pipe length from the heat source unit to the farthest indoor unit

A+C+g or C+g 150 [492] or less

(Equivalent length 175 [574] or less)

Between heat source unit and BC controller A 110 [360] or less

Height difference

Between BC controller and indoor unit e or C+g 40 [131] or less Between indoor and

heat source units

Heat source unit above indoor unit

Heat source unit below

H 50 [164] or less

H' 40 [131] or less

indoor unit

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

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

Between main BC controller and sub BC controller h3 15 [49] or less Between indoor unit (main BC controller) and

h4 15 [49] or less (10 [32] or less)

*3*4

indoor unit (sub BC controller)

*1. When the aggregate length of all pipes exceeds 300m [984ft], observe the restrictions in the figure titled "Restrictions

on pipe length" below.

*2. 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)

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

*4. When connecting 2 sub BC controllers to a system, observe the allowable length in the table above.

* 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.

* In the system to which indoor units of P72 model or above are connected, neither a branch joint nor a branch header

may be used.

Restrictions on pipe length

400[1312]

350[1148]

300[984]

250[820]

200[656]

Aggregate length of all pipes (m[ft])

[98]40[131]50[164]60[196]70[229]80[262]90[295]

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

100

[328]

110

[360]

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

70[229]

60[196]

50[164]

40[131]

30[98]

20[65]

10[32]

Pipe length between main BC

controller and farthest indoor unit (m[ft])

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

[16]

[32]

[49]

- 58 -

Page 68

3. Refrigerant pipe size

(1) Between heat source unit and BC controller (Part A)

Operation

Refrigerant pipe size

Connection to heat source unit and BC controller

(Note) Flanges with a short copper pipe are attached to the low-pressure pipes on the heat source units.

Highpressure pipe

Lowpressure pipe

Highpressure pipe

Lowpressure pipe

PQRY-P72TGMU-A PQRY-P96TGMU-A

ø15.88 [5/8"] ø19.05 [3/4"]

ø19.05 [3/4"] ø22.2 [7/8"]

ø15.88 [5/8"]

(Brazed

connection)

ø19.05 [3/4"]

(Brazed

connection)

Heat source unit

(Brazed connection)

[ II Restrictions ]

Unit: mm [in]

ø19.05 [3/4"]

ø22.2 [7/8"]

- 59 -

Page 69

[ II Restrictions ]

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

Operation

Refrigerant pipe size

Connection to indoor unit (Flare connection for all models)

(3) Between main BC controller and sub BC controller (Part C)

Operation

Refrigerant pipe size (Brazed connection for all models)

Liquid pipe

Gas pipe

Liquid pipe

Gas pipe

Liquid pipe ø9.52 [3/8"] ø12.7 [1/2"]

High-pressure gas pipe

Low-pressure gas pipe

06,08,12,15,18 24,27,30,36,48 72 96

ø6.35 [1/4"] ø9.52 [3/8"]

ø12.7 [1/2"] ø15.88 [5/8"] ø19.05 [3/4"] ø22.2 [7/8"]

ø6.35 [1/4"] ø9.52 [3/8"]

ø12.7 [1/2"] ø15.88 [5/8"] ø19.05 [3/4"] ø22.2 [7/8"]

-P72 P73-P108 P109-P126

ø15.88 [5/8"] ø19.05 [3/4"]

ø19.05 [3/4"] ø22.2 [7/8"] ø28.58 [1-1/8"]

Unit: mm [in]

Indoor unit

Unit: mm [in]

Indoor unit

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

(Note) Use the piping that is specified in Section "[3] Piping Materials" under "Read Before Servicing".

- 60 -

Page 70

4. Connecting the BC controller

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

P72 and P96 models

[ II Restrictions ]

To heat source unit

BC controller

*1 Reducer (Standard supplied parts)

IndoorIndoor

P18 model or below

The ports of the BC controller accommodates the pipes on P18-P54 models of indoor units. To connect other types of indoor units, follow the procedure below.

P24-P54 models P72-P96 models

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

Indoor

Connection: Brazed connection

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

Maximum of 3 units per port Total capacity of P160 or below (All units connected to the same port must be in the same operating mode.)

IndoorIndoorIndoor

Unit: mm [in]

Pipe sections

Operation

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

Heat source unit side

PQRY-P72TGMU-A ø15.88 [5/8"] (Brazed connection) ø19.05 [3/4"] (Brazed connection)

PQRY-P96TGMU-A ø19.05 [3/4"] (Brazed connection) ø22.2 [7/8"] (Brazed connection)

Indoor unit side ø9.52 [3/8"] (Flare connection) ø15.88 [5/8"] (Flare connection)

- 61 -

Page 71

[ II Restrictions ]

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

2) To connect P72 or P96 models of indoor units (or when the total capacity of indoor units exceeds P55), use a junction pipe kit (model name: CMY-R160J) and merge the two nozzles.

70 [2-25/32"]

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

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

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

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

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

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

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-G (optional accessory). Refrigerant pipe selection (size of the pipes in sections A and B in the figure above): Select the proper

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

234 [9-7/32"]

Liquid pipe side: 9.52[3/8]ID

Gas pipe side: 19.05[3/4]ID(*1)

*1 To connect P280 models of indoor units, use the 22.2

[7/8"]

ID reducer that is supplied.

Supplied with a thermal insulation cover

Total capacity of indoor units Liquid pipe Gas pipe

P54 or below

P55-P72 ø19.05 [3/4"]

ø9.52 [3/8"]

P73-P96 ø22.2 [7/8"]

*1. Use the pipe that is supplied.

Unit: mm [in]

ø15.88 [5/8"]

- 62 -

Page 72

[ II Restrictions ]

(2) Size of the pipe that fits the main BC controller ports

P72 and P96 models

Branch joint (Model name:CMY-Y102S-G) (Optional accessory for use with the Y series of City Multi)

A B

To heat source unit

*1 Reducer (Standard supplied parts)

Connection: brazed connection

Main BC controller

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

Indoor unit Indoor unit Indoor unit Indoor unit Indoor unitIndoor unit

P18 model or below

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 P72 or P96 models of indoor units (or when the total capacity of indoor units exceeds P55), use a junction pipe kit (model name: CMY-R160J) 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 Refrigerant pipe selection (size of the pipes in sections A and B in the figure above): Select the proper size pipes

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

P24-P54models P72-P96 models

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.)

Unit: mm [in]

Total capacity of indoor units Liquid pipe Gas pipe

P54 or below

P55-P72 ø19.05 [3/4"]

ø9.52 [3/8"]

P73-P96 ø22.2 [7/8"]

ø15.88 [5/8"]

*1. Use the pipe that is supplied.

Unit: mm [in]

Pipe sections

Operation

High pressure side Low-pressure side

Heat source unit side

PQRY-P72TGMU-A ø15.88 [5/8"] (Brazed connection) ø19.05 [3/4"] (Brazed connection)

PQRY-P96TGMU-A ø19.05 [3/4"] (Brazed connection) ø22.2 [7/8"] (Brazed connection)

Indoor unit side ø9.52 [3/8"] (Flare connection) ø15.88 [5/8"] (Flare connection)

- 63 -

Page 73

[ II Restrictions ]

(3) Size of the pipe that fits the sub BC controller ports

P72 and P96 models

Main BC controller

*1 Reducer (Standard supplied parts)

Connection: brazed connection

Sub BC controller

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

A B

Branch joint (Model name:CMY-Y102S-G) (Optional accessory for use with the Y series of City Multi)

Indoor unit Indoor unit Indoor unit Indoor unit Indoor unitIndoor unit

P18 model or below

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 P72 or P96 models of indoor units (or when the total capacity of indoor units exceeds P55), use a junction pipe kit (model name: CMY-R160J) and merge the two nozzles.

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

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

P55-P72 ø19.05 [3/4"]

P73-P96 ø22.2 [7/8"]

P24-P54 models P72-P96 models

ø9.52 [3/8"]

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.)

Unit: mm [in]

ø15.88 [5/8"]

*1. Use the pipe that is supplied.

Operation Pipe sections

Total capacity of the indoor units that are connected to the BC controller in question

On the BC controller

P72 model or below ø15.88 [5/8"]

side

P73-P108 models

P109 model or above ø28.58 [1-1/8"]

High-pressure side

(gas)

(Brazed connection)

ø19.05 [3/4"]

(Brazed connection)

- 64 -

Low-pressure side

(gas)

ø19.05 [3/4"]

(Brazed connection)

ø22.2 [7/8"]

(Brazed connection)

Unit: mm [in]

Liquid pipe side

ø9.52 [3/8"]

(Brazed connection)

ø12.7 [1/2"]

(Brazed connection)

Page 74

III Heat Source Unit / BC Controller Components

[1] Heat Source Unit Components and Refrigerant Circuit ...................................................67

[2] Control Box of the Heat Source Unit................................................................................ 69

[3] Heat Source Unit Circuit Board........................................................................................ 70

[4] BC Controller (Under the panel) ......................................................................................73

[5] Control Box of the BC Controller .....................................................................................75

[6] BC Controller Circuit Board ............................................................................................. 76

- 65 -

Page 75

- 66 -

Page 76

III Heat Source Unit / BC Controller Components

[1] Heat Source Unit Components and Refrigerant Circuit

1. PQHY-P72 and P96 models

Sub box

Heat exchanger

[ III Heat Source Unit / BC Controller Components ]

Control box

4-way valve

Check valve block

Solenoid valve block

Fusible plug

Accumulator

Solenoid valve (SV7a~7c)

Compresso

- 67 -

Page 77

[ III Heat Source Unit / BC Controller Components ]

2. PQRY-P72 and P96 models

Sub box

Heat exchanger

4-way valve

Control box

Check valve block

Solenoid valve block

Fusible plug

Accumulator

Solenoid valve (SV7a~7c)

Compressor

- 68 -

Page 78

[2] Control Box of the Heat Source Unit

1. PQHY/PQRY-P72 and P96 models

(1) Under the circuit board cover

[ III Heat Source Unit / BC Controller Components ]

Gateamp board

Power circuit board

Bleeder resistance(R2)

Transformer(T)

ACCT-U phase

Choke coil

(L1,L2)

ACCT-W phase

DCL

DCCT

Smoothing capacitor(C1)

Electromagnetic relay(52C)

In-rush current protection(R1) Diode stack(DS)

Control circuit board Noise filter(NF)

Terminal block for centralized control system transmission line(TB7)

Terminal block for indoor/outdoor (heat source) transmission line(TB3)

Terminal block for power supply(TB1)

...

Rear

(2) Sub box

Pump interlock input Terminal block for operation-ON signal output (TB8)

Relay board

- 69 -

Page 79

[ III Heat Source Unit / BC Controller Components ]

[3] Heat Source Unit Circuit Board

1. Heat source MAIN board

(1) PQHY/PQRY

CN38 High-pressure switch (63H)

CN52C 52C1 driving output

1 - 3

CN51

3 - 4

Compressor operation

3 - 5

Outdoor (heat source) unit operation error signal output

Output from solenoid valve for unit control etc.

CNOUT1 Relay drive output to relay board

AC 208/230V

(208/230V)

CNRS3B Serial communication input from and output to inverter board

CNS1 For indoor/outdoor (heat source) transmission line (DC30V)

LD2

CNS2 For centralized control system (DC30V)

CN40(with power supply to centralized system)

CN41(without power supply to centralized system)

CNVCC1 Control power supply input

1 - 2 DC 30V

DC 30V

1 - 3 4 - 5

DC 12V

4 - 6

DC 7V

7 - 8

CN63PW

Pump interlock signal input

1 - 2 from relay board

CN3D

NIGHT MODE input

1 - 2 1 - 3

Compressor ON/OFF input

LD1 Service LED

CNLVC LEV2 Output

CNLVB LEV1 Output(WY only)

DC 7V

CNAC3 Power output

3 L1 phase 1 L2 phase

CN20 Power input

5 L1 phase 1 Ground

CN21 Power input

3 L2 phase 1 L3 phase

F1,F2 Fuse AC 250V/6A

Address SW

Dip switch SW1 - SW5

Control sensor input

- 70 -

Page 80

2. Heat source unit inverter board

(1) PQHY/PQRY

[ III Heat Source Unit / BC Controller Components ]

LED3 charge lamp

CNDC2 DC bus voltage input

1 - 3

DC 280V

CN15V2 Power output for IPM control

1 - 2

DC 15V

5 - 6

DC 15V

9 - 10 DC 15V

- 14

DC 15V

CN30V Bleeder resistance connection

SW1

SW2 Address setting

F01

Fuse

AC 250V/2A

CNAC2 Power input (AC 208/230V)

5 L1 phase 3 L3 phase 1 Ground

CNFAN Cooling fan output

1 - 3

AC 208/230V

CNRS1

CN52C 52C2 driving output 1 - 3

AC 208/230V

CNRS2 Serial communication input from and output to main circuit board

CNFG Ground

CNL2 Choke coil for transmission line

CNL1 Choke coil for transmission line

CNVCC1 Power supply for control circuit 1 - 2 DC 30V 1 - 3 DC 30V 4 - 5 DC 7V 4 - 6 DC 12V 7 - 8 DC 7V

CNDR2 IPM control signal output

CNCT DCCT input

CNTH Inverter heatsink

CNCT2 ACCT input

LED2

LED1

Inverter operation

(THHS)

Inverter error

- 71 -

Page 81

[ III Heat Source Unit / BC Controller Components ]

3. RELAY BOARD

(1) PQHY/PQRY

CNAC4 Power input 4 L1 phase

1 L2 phase

CN81 Solenoid valve output for unit control(208/230V)

CN83

1 - 3 Operation-ON signal output 5 - 7 Pump interlock input

CNPWCNOUT2

Relay drive input from main board

1 - 2 Pump interlock signal output to main board

- 72 -

Page 82

[4] BC Controller (Under the panel)

1. CMB-P NU-G (A)

(1) Front

(2) Rear view <GA type>

LEV2 PS1PS3

TH16

[ III Heat Source Unit / BC Controller Components ]

Liquid pipe (Indoor unit side)

Gas pipe (Indoor unit side)

Gas/Liquid separator

Tube in tube heat exchanger

(3) Rear view <G type>

TH11

TH12

TH15

PS1

LEV3

LEV1

SVM2

SVM1

TH11

SVM1

LEV3 LEV1

Gas/Liquid separator

Tube in tube heat exchanger

PS3

TH16

TH12

TH15

- 73 -

Page 83

[ III Heat Source Unit / BC Controller Components ]

2. CMB-P NU-GB

(1) Front

(2) Rear view

Liquid pipe (Indoor unit side)

Gas pipe (Indoor unit side)

TH22

LEV3a

TH25

- 74 -

Page 84

[5] Control Box of the BC Controller

1. CMB-P1016NU-GA

Transformer

[ III Heat Source Unit / BC Controller Components ]

Terminal block for power supply

Terminal block for transmission line

Relay board

BC controller board

- 75 -

Page 85

[ III Heat Source Unit / BC Controller Components ]

[6] BC Controller Circuit Board

1. BC controller circuit board (BC board)

SW4

SW5

SW1SW2

- 76 -

Page 86

2. RELAY BOARD (RELAY 4 board)

3. RELAY BOARD (RELAY 10 board)

[ III Heat Source Unit / BC Controller Components ]

- 77 -

Page 87

- 78 -

Page 88

IV Remote Controller

[1] Functions and Specifications of MA and ME Remote Controllers ...................................81

[2] Group Settings and Interlock Settings via the ME Remote Controller .............................82

[3] Interlock Settings via the MA Remote Controller .............................................................86

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

- 79 -

Page 89

- 80 -

Page 90

[ 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 (heat source) 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

Remote controller address settings Not required Required

Indoor/outdoor (heat source) unit address settings

Not required (required only by a system with one outdoor (heat source) unit)

Wiring method Non-polarized 2-core cable

Required

Non-polarized 2-core cable

∗To perform a group operation, dai-

sy-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 (heat source) 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.

*2*3

*1. MA remote controller refers to MA remote controller, MA simple remote controller, and wireless 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 (heat source) units is conducted or when a system controller is connected.

*3. M-NET remote controller refers to ME remote controller.

*4. Depending on the system configuration, some systems with one outdoor (heat source) 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

There is little likelihood of system expansion and

grouping changes.

Grouping (floor plan) has been set at the time of in-

stallation.

*1*2

M-NET (ME) remote controller

There is a likelihood of centralized installation of re-

mote controllers, system expansion, and grouping changes.

Grouping (floor plan) has not been set at the time of

installation.

To connect the remote controller directly to the OA

processing 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.

*1*2

Heat source unit

MA remote controller

M-NET transmission line (indoor/outdoor (heat source) transmission line)

groupgroup

Indoor unit

- 81 -

Heat source unit

M-NET remote controller

M-NET transmission line (indoor/outdoor (heat source) transmission line)

groupgroup

Indoor unit

Page 91

[ 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 (heat source) units or to manually set up the indoor/outdoor (heat source) 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

Bring up either one of the following displays on the remote controller: The blinking display of HO, which appears when the power is turned on, or the normal display, which appears when the unit is stopped. The display window must look like one of the two figures below to proceed to the next step.

MODE TIMER

PAR-F27MEA-US

SET TEMP.

CLOCKONOFF

TIMER SET

FAN SPEED

LOUVER

ON/OFF

FILTER

AIR DIRECTION

CHECK

VENTILATION

TEST

F A

[Blinking display of HO ]

Bring up the Group Setting window.

-Press and hold buttons [FILTER] and [Louver]

[Normal display]

simultaneously for 2 seconds to bring up the display as shown below.

Indoor unit address display window

Select the unit address.

Select the address of the indoor unit to be registered by pressing

button

[SET TEMP. ( ) or ( )] to advance or go back

through the addresses.

- Press button [TEST] to register the indoor unit address

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.

Unit type (Indoor unit in this case)

(B) Interlock Settings (A) Group Settings

Bring up the Interlock Setting window.

-Press button [MODE] to bring up the following display.

Press again to go back to the Group Setting window as shown under step .

Indoor unit address display window

Bring up the address of the indoor unit and the address of the

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 [SET TEMP. ( ) or ( )] to advance or go back through 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.

Make the settings to interlock LOSSNAY units with indoor units.

- Press button [TEST] while both the indoor unit address and

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.

blinks to indicate a registration error. (Indicates that selected address does not have a corresponding unit.)

To register the addresses for multiple indoor units, repeat steps and above.

To search for an address, go to section (2) Address Search.

If registration is successfully completed, the two displays as shown on the left will appear alternately.

(Displayed alternately)

If the registration fails, will blink on the display. (Indicates that the selected address does not have a corresponding unit.)

NOTE : Interlock all the indoor units in the group with the LOSSNAY units; otherwise, the LOSSNAY units will not operate.

- 82 -

Page 92

[ 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.

Press and hold buttons [FILTER] and [Louver] simultaneously for 2 seconds to go back to the window as shown in step .

(2) Address search

To search for the address of indoor units that have been entered into the remote controller, follow steps and .

(A) To search group settings

Bring up the Group Setting window.

- Each pressing of button [TIMER ] will bring up the address of a

registered indoor unit and its unit type on the display.

Unit type (Indoor unit in this case)

- 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 [TIMER ] .

Repeat steps and in the previous page to interlock

all the indoor units in a group with the LOSSNAY unit.

To go back to the normal display, follow step .

To search for an address,

go to section (2) Address Search.

(B) Interlock setting search

After performing step , proceed as follows:

Bring up the address of the indoor unit to be searched on

the display.

- Select the address of the indoor unit to be searched by pressing

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.

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 [TIMER], the address of the

LOSSNAY and indoor unit that is interlocked with it will be displayed alternately.

Address of an interlocked LOSSNAY unit

(Displayed alternately)

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

[TIMER] will bring up the address of another registered

unit. (The display method is the same as the one in step .)

To go back to the normal display, follow step .

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.

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

display to delete the interlock setting.

- 83 -

Page 93

[ IV Remote Controller ]

FAN SPEED

NOT AVAILABLE

(A) To delete group settings

(B) To delete interlock settings

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.

will be displayed in the room temperature display window.

To go back to the normal display, follow step .

(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 three types of functions can be made or changed as necessary.

1) 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, AUTO COOL or AUTO HEAT will appear on the remote controller display. This setting can be changed so that only AUTO will appear on the display.

2) 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.

3) Narrowed preset temperature range mode The default temperature ranges are 19 C to 30 C (67 F to 87 F) in the cooling/dry mode and 17 C to 28 C (63 F to 83 F) in the heating 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

On the PAR-F27MEA-US model, automatic operation mode cannot be selected while the unit is in the narrowed preset temperature range mode. Only the lower limit can be set for cooling/dry mode, and upper limit for heating mode.

[Function selection mode sequence on the remote controller]

Normal Display (Stopped unit)

CENTRALLY CONTROLLED

COOL

DRY

DAILY

AUTO OFF

AUTO

FAN

SET TEMP.

CHECK

HEAT

STAND BY

DEFROST

MODE TIMER

PAR-F27MEA-US

SET TEMP.

TIMER SET

AUTOONAUTO

TIMER

CLOCK

REMAINDER

ERROR CODE

CLOCK ON OFF

OFF

FAN SPEED

VENTILATION

FUN SPEED

LOUVER

1Hr.

AIR DIRECTION

VENTILATION

SENSOR

INSIDE

FILTER CHECK MODE TEST RUN LIMIT TEMP.

ON/OFF

CHECK TEST

FILTER

Remote controller function selection mode

Operation mode display selection mode

Room temperature display selection mode

Narrowed preset temperature range mode (cooling/dry mode)

Narrowed preset temperature range mode

(heating

mode)

[Normal display]

: Press and hold the [CHECK] and [MODE] buttons simultaneously for two seconds.

( ) ]

: [SET TEMP.

( ) ]

button button

- 84 -

Page 94

[ 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 [MODE] simultaneously for 2 seconds to go into the operation mode display selection mode under the remote controller function selection mode. Press button [SET TEMP. ( )] or [SET TEMP. ( )] to go into the other three modes

under the remote controller function selection mode.

Operation mode display selection mode (Display or non-display of room temperature on the remote controller.)

SET TEMP.

TIMER

CLOCK

AUTOONAUTO

REMAINDER

ERROR CODE

OFF

FAN SPEED

VENTILATION

1Hr.

NOT AVAILABLE

SENSAOR

INSIDE

FILTER

CHECK MODE

TEST RUN LIMIT TEMP.

AUTO COOL/HEAT will blink, and either ON or OFF will light up.

Press button [TIMER SET ( ) or ( )] in this

state to switch between ON and OFF.

DRY COOL

AUTO FAN

STAND BY DEFROST

CENTRALLY CONTROLLED

AUTO OFF

CHECK

HEAT

1Hr.

DAILY

AUTOONAUTO

TIMER

OFF

CLOCK

SET TEMP.

REMAINDER

ERROR CODE

FAN SPEED

VENTILATION

NOT AVAILABLE

SENSAOR

INSIDE

FILTER

CHECK MODE

TEST RUN

[TIMER SET ( ) (( ))] button

LIMIT TEMP.

DRY COOL

AUTO FAN

STAND BY DEFROST

CENTRALLY CONTROLLED

DAILY

AUTO OFF

CHECK

HEAT

When it is set to ON, AUTO and COOL or AUTO and HEAT will appear on the display during automatic operation mode. When it is set to OFF, only AUTO will appear on the display during automatic operation mode.

Room temperature display selection mode (Display or non-display of room temperature)

88 F will blink in the room temperature display window, and either ON or OFF will light up. Press button [TIMER SET ( ) or ( )] in this state to switch between ON and OFF.

DRY COOL

AUTO FAN

STAND BY DEFROST

AUTO OFF

CHECK

HEAT

CENTRALLY CONTROLLED

DAILY

AUTOONAUTO

TIMER

CLOCK

SET TEMP.

REMAINDER

ERROR CODE

OFF

FAN SPEED

1Hr.

VENTILATION

NOT AVAILABLE

SENSAOR

INSIDE

FILTER CHECK MODE TEST RUN

[TIMER SET ( ) (( ))] button

LIMIT TEMP.

DRY COOL

AUTO FAN

STAND BY DEFROST

AUTO OFF

CHECK

HEAT

CENTRALLY CONTROLLED

DAILY

AUTOONAUTO

TIMER

CLOCK

SET TEMP.

REMAINDER

ERROR CODE

OFF

FAN SPEED

1Hr.

VENTILATION

NOT AVAILABLE

SENSAOR

INSIDE

FILTER

CHECK MODE

TEST RUN LIMIT TEMP.

When it is set to ON, the room temperature will stay in the operation display window during operation. When it is set to OFF, the room temperature will not appear in the operation display window during operation.

Narrowed preset temperature range mode (The range of preset temperature can be changed.)

1) Temperature range setting for the cooling/dry mode COOL/DRY and LIMIT TEMP. will light up in the display window, and the temperature range for the cooling/dry mode will appear on the display.

The lower limit temperature will be blinking in the preset temperature display window. While it is blinking, the temperature setting can be changed. [Selection range for the lower limit temperature] : 67 F 87 F (

Medium temperature range indoor unit 57 F 87 F)

(The upper limit temperature is fixed at 87 F. Only the lower limit temperature is changeable.)

DRY COOL

AUTO FAN

STAND BY DEFROST

CENTRALLY CONTROLLED

AUTO OFF

CHECK

HEAT

DAILY

TIMER

CLOCK

SET TEMP.

AUTOONAUTO

REMAINDER

ERROR CODE

OFF

FAN SPEED

VENTILATION

1Hr.

NOT AVAILABLE

SENSAOR

INSIDE

FILTER CHECK MODE TEST RUN

LIMIT TEMP.

[When the temperature range for the cooling or dry mode is set to 67 F to 87 F]

STAND BY DEFROST

CHECK

TIMER

1Hr.

VENTILATION

NOT AVAILABLE

2) Press button [TIMER SET ( ) or ( )] to set the lower limit temperature to the desired temperature.

[When the temperature range is changed to 75 F - 87 F]

3) After completing the step above, press button [SET TEMP. ( )] to go into the temperature range setting mode to set the temperature

range for the heating operation.

HEAT and LIMIT TEMP will light up, and the temperature range for the heating mode will appear on the screen. The upper limit temperature can be changed with button [TIMER SET ( ) or ( )]. [Selection range for the upper limit temperature] : 63 F 83 F (

Medium temperature range indoor unit 63 F 83 F)

(The lower limit temperature is fixed at 63 F. Only the upper limit temperature is changeable.)

3. When all the necessary settings have been made, exit the remote controller function selection mode and go back to the Normal display by pressing and holding buttons [CHECK] and [MODE] simultaneously for 2 seconds.

- 85 -

Page 95

[ IV Remote Controller ]

[3] Interlock Settings via the MA Remote Controller

1. LOSSNAY interlock setting (Make this setting only when necessary.)

Make this setting only when necessary.

*When an upper controller is connected, make the settings on the upper controller.

NOTE : To perform an interlocked operation with LOSSNAY units, interlock all the indoor units in the group with the LOSSNAY units.

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.

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

indoor unit to which the remote controller is connected.

Search result

- The indoor unit address and the interlocked LOSSNAY address will appear alternately.

- Without interlocked LOSSNAY settings

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 >

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).

Press the [ CLOCK ( ) or ( )] button to select the address of the LOSSNAY to be interlocked (01 to 50).

Indoor unit address LOSSNAY address

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.

- 86 -

Page 96

[ IV Remote Controller ]

< 2. Search Procedures >

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.

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

indoor unit and LOSSNAY on the display.

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

- 87 -

Page 97

[ IV Remote Controller ]

2. Remote controller function selection via the MA remote controller

(1) Remote controller function

The settings for the following remote controller functions can be changed in the remote controller function selection mode. Change the settings as necessary.

Category 1 Category 3 (Setting content)

1.Language selection ( CHANGE LANGUAGE )

2.Function lock ( FUNCTION SELECTION )

3.Mode selection ( MODE SELECTION )

4.Display mode ( DISP MODE SETTING )

Select the language in which the menu appears.

(1)

Function lock setting ( LOCKING FUNCTION ) (2) Use of automatic mode ( SELECT AUTO MODE ) (3) Temperature range setting ( LIMIT TEMP FUNCTION ) (1) Remote controller main/sub setting ( CONTROLLER MAIN/SUB )

(2) Clock enable/disable function ( CLOCK ) (3) Timer function setting ( WEEKLY TIMER ) (4)Technical assistance contact number setting ( CALL )

(1) Temperature unit selection ( TEMP MODE C/ F ) (2)

Suction air temperature display setting ( ROOM TEMP DISP SELECT ) (3)

Automatic cooling/heating display setting ( AUTO MODE DISP C/H )

[Function selection flowchart] [1] Stop the air conditioner to start the remote controller function selection mode. [2] Select from category 1. [3] Select from category 2. [4] Make the setting. [5] Setting completed [6] Go back to the normal display (Finish)

Category 2

TEMP.

MONITOR/SET

BACK DAY

PAR-21MAA

CLOCK

ON/OFF

Multi-language display is supported.

Sets the type of locking to put into effect Enables or disables automatic operation mode Sets the adjustable temperature range (maximum, minimum) Sets the remote controller as main or sub

When two remote controllers are connected to the same group, one controller must be set as sub. Enables or disables clock function Sets the timer type

Contact number can be set to appear in case of error. Sets the telephone number

Sets the temperature unit ( C or F) for display Switches between display and non-display of indoor (suction) air temperature

Switches between display and non-display of Cool or Heat during automatic mode

Dot display

Messages are displayed in the selected language. All examples in this manual are given in English

OPERATION

ON/OFF

CHECK

CLEAR

FILTER

TEST

Normal display (Display that appears when the air condition is stopped)

(Press and hold the button and button simultaneously for two seconds.) *The display cannot be changed during function selection, test run, and self-diagnosis.

Category 1 Remote controller function

Language selection

( CHANGE LANGUAGE )

Press the button.

E D

selection mode

Category 2

Function lock

( FUNCTION SELECTION )

Press the button.

Mode selection

( MODE

SELECTION )

Press the button.

Press the

Press the button.

Press the

Press the button.

button.

Function lock setting ( LOCKING FUNCTION )

Use of automatic mode ( SELECT AUTO MODE )

Temperature range setting ( LIMIT TEMP FUNCTION )

Remote controller main/sub setting ( CONTROLLER MAIN/SUB )

Clock enable/disable function ( CLOCK )

Timer function setting ( WEEKLY TIMER )

Technical assistance contact number setting ( CALL )

Temperature unit selection ( TEMP MODE C/ F )

Display mode

( DISP MODE

SETTING )

Press the

button.

Suction air temperature display setting ( ROOM TEMP DISP SELECT )

Automatic cooling/heating display setting ( AUTO MODE DISP C/H )

(Press and hold the button and

E D

button simultaneously for two seconds.) *The settings that are made according to this procedure are stored in the remote controller memory.

Press the button.

Press the

button.

DDD

Press the

button.

Press the button.

See [4]-1

Category 3

(Setting content)

See [4]-2. (1)

See [4]-2. (2)

See [4]-2. (3)

See [4]-3. (1)

See [4]-3. (2)

See [4]-3. (3)

See [4]-3. (4)

See [4]-4. (1)

See [4]-4. (2)

See [4]-4. (3)

NOTE Timer operation stops when the display is changed from remote controller function selection to normal display.

- 88 -

Page 98

[ IV Remote Controller ]

[Setting details] [4] -1. Language selection The language that appears on the dot display can be selected from among the following.

Press the [ MENU] button to change the following setting.

1 2

Japanese (JP), English (GB), German (D), Spanish (E),

Russian (RU), Italian (I), Chinese (CH), French (F)

7 8

[4] -2. Function lock (1) Function lock setting

Press the [ ON/OFF] button to change the following setting.

no1:

All buttons except the [ ON/OFF] button are locked.

1 2

no2: All buttons are locked.

OFF (Initial setting): No buttons are locked.

* To enable locking from the normal display, press and hold the [FILTER] and [ ON/OFF] buttons simultaneously for two seconds on the normal display after the above setting is made.

(2) Automatic mode display selection When the remote controller is connected to a unit with an automatic operation mode, the following settings can be made.

Press the [ ON/OFF] button to change the following setting.

ON (Initial setting) : Automatic mode is displayed when the operation mode is selected.

OFF

(3) Temperature range setting

After this setting is made, the temperature can be changed within the set range.

: Automatic mode is not displayed when the operation mode is selected.

Press the [ ON/OFF] button to change the following setting.

LIMIT TEMP COOL MODE: The temperature range for the cooling/dry mode can be changed.

LIMIT TEMP HEAT MODE: The temperature range for the heating mode can be changed.

LIMIT TEMP AUTO MODE: The temperature range for the automatic mode can be changed.

OFF (Initial setting): The temperature range is not set.

When any setting other than OFF is selected, the temperature range

setting for cooling, heating, and automatic mode is also made. The range setting will not take effect if the temperature range has not been set.

To increase or decrease the temperature, press the [ TEMP ( ) or ( )] button. To switch between the upper limit setting and the lower limit setting, press the button. The selected setting will flash, allowing the temperature to be set. Settable range Cooling/Dry mode Lower limit: 19 Upper limit: 30 Heating mode

Lower limit: 17 C ~ 28 C [63 F ~ 83 F] Upper limit: 28 Automatic mode Lower limit: 19 Upper limit: 28 The settable range varies depending on the unit to be connected.

(Mr. Slim units, Free-plan units, and medium temperature range units)

C ~ 30 C [67 F ~ 87 F]

C ~ 19 C [87 F ~ 67 F]

C ~ 17 C [83 F ~ 63 F] C ~ 28 C [67 F ~ 83 F] C ~ 19 C [83 F ~ 67 F]

[4] -3. Mode selection

(1) Remote controller main/sub setting

Press the [ ON/OFF] button to change the following setting.

Main: Designates the controller as the main controller.

Sub: Designates the controller as the sub controller.

(2) Clock enable/disable function

Press the [ ON/OFF] button to change the following setting.

ON: Clock function is enabled.

OFF: Clock function is disabled.

(3) Timer function setting

Press the [ ON/OFF] button to change the following setting. (Select one of the following.)

WEEKLY TIMER (Initial setting):

2 3 4

When the clock setting is set to OFF, the WEEKLY TIMER is

Auto off timer function is enabledAUTO OFF TIMER:

Simple timer function is enabled.SIMPLE TIMER:

Timer function is disabled.TIMER MODE OFF:

Weekly timer function is enabled

disabled.

(4) Technical assistance contact number setting

Press the [ ON/OFF] button to change the following setting.

CALL OFF: The set contact numbers are not displayed in an error situation.

CALL **** *** ****: The set contact numbers are displayed in an error situation.

CALL_: Contact numbers can be entered when the display appears as shown on the left.

Setting the contact numbers To set the contact numbers, follow the following procedures. Move the flashing cursor to set the numbers. Press the [ TEMP. ( ) or ( )] button to move the cursor right (left). Press the [ CLOCK( ) or ( )] button to set the numbers.

[4] -4. Display mode change (1) Temperature unit selection

Press the [ ON/OFF] button to change the following setting.

C (Initial setting): Temperature is displayed in C.

F: Temperature is displayed in F.

(2) Suction air temperature display setting

Press the [ ON/OFF] button to change the following setting.

ON: Suction air temperature is displayed.

OFF: Suction air temperature is not displayed.

(3) Automatic cooling/heating display setting

Press the [ ON/OFF] button to change the following setting.

ON: Either COOL or HEAT is displayed during automatic mode.

OFF: Only AUTO is displayed during automatic mode.

[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 sen-

sor on the indoor unit instead.

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

tected.

- 89 -

Page 99

- 90 -

Page 100

V Electrical Wiring Diagram

[1] Electrical Wiring Diagram of the Heat Source Unit ..........................................................93

[2] Electrical Wiring Diagram of the BC Controller................................................................ 94

- 91 -

Mitsubishi CMB-P104, P96TGMU-A, PQRY-P72, CMB-P108, P1016NU-GA Service Handbook

Specifications and Main Features

Frequently Asked Questions

User Manual