Mitsubishi Electronics PUHY-P144, PUHY-P168, PUHY-P216, PUHY-P36, PUHY-P240YTSHMU-A User Manual

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Safety Precautions

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

WARNING

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

the risk of serious injury or death.

CAUTION

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

the risk of serious injury or damage to the unit.

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

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

WARNING

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Do not touch the heat exchanger fins.

The fins are sharp and dangerous.

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WARNING

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

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

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

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

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

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

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

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

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

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

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

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

Only use accessories recommended by MITSUBISHI.

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

Control box houses high-voltage parts.

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

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Precautions for handling units for use with R410A

CAUTION

Do not use the existing refrigerant piping.

A large amount of chlorine that 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

detect an R410A leak because R410A is free of chlorine.

Do not use a charging cylinder.

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

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

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

Only use refrigerant R410A.

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

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Before installing the unit

WARNING

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

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

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

The unit is not designed to preserve food products.

Do not use the unit in an unusual environment.

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

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

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

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

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

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

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

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

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

CAUTION

Properly ground the unit.

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

Do not put tension on the power supply wires.

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

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

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

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

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

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

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

Periodically check the installation base for damage.

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

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

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

Exercise caution when transporting products.

Products weighing more than 20 kg should not be carried

alone.

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

some products.

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

dangerous.

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

to prevent the unit from falling.

Properly dispose of the packing materials.

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

injury.

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

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

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

Otherwise, electric shock and/or fire may result.

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

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Before the test run

CAUTION

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

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

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

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

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

Do not operate the unit without panels and safety guards.

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

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

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

Do not operate the unit without the air filter.

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

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CONTENTS

III

VII

VIII

Read Before Servicing

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

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

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

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

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

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

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

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

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

Restrictions

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

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

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

[4] Sample System Connection ................................................................................................... 26

[5] An Example of a System to which an MA Remote Controller is connected ........................... 27

[6] An Example of a System to which an M-NET Remote Controller is connected ..................... 37

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

Controller are connected ........................................................................................................39

[8] Restrictions on Pipe Length.................................................................................................... 41

Outdoor Unit Components

[1] Outdoor Unit Components and Refrigerant Circuit ................................................................. 47

[2] Control Box of the Outdoor Unit.............................................................................................. 49

[3] Outdoor Unit Circuit Board...................................................................................................... 52

Remote Controller

[1] Functions and Specifications of MA and ME Remote Controllers .......................................... 65

[2] Group Settings and Interlock Settings via the ME Remote Controller .................................... 66

[3] Interlock Settings via the MA Remote Controller .................................................................... 70

[4] Using the built-in Temperature Sensor on the Remote Controller .......................................... 71

Electrical Wiring Diagram

[1] Electrical Wiring Diagram of the Outdoor Unit ........................................................................ 75

[2] Electrical Wiring Diagram of Transmission Booster................................................................ 78

Refrigerant Circuit

[1] Refrigerant Circuit Diagram .................................................................................................... 81

[2] Principal Parts and Functions ................................................................................................. 82

Control

[1] Functions and Factory Settings of the Dipswitches ................................................................ 89

[2] Controlling the Outdoor Unit ................................................................................................... 96

[3] Operation Flow Chart............................................................................................................ 108

Test Run Mode

[1] Items to be checked before a Test Run ................................................................................ 115

[2] Test Run Method .................................................................................................................. 116

[3] Operating Characteristic and Refrigerant Amount................................................................ 117

[4] Adjusting the Refrigerant Amount......................................................................................... 117

[5] Refrigerant Amount Adjust Mode.......................................................................................... 120

[6] The following symptoms are normal. .................................................................................... 122

[7] Standard Operation Data (Reference Data) ......................................................................... 123

Troubleshooting

[1] Error Code Lists.................................................................................................................... 149

[2] Responding to Error Display on the Remote Controller........................................................ 152

[3] Investigation of Transmission Wave Shape/Noise ............................................................... 231

[4] Troubleshooting Principal Parts............................................................................................ 234

[5] Refrigerant Leak ................................................................................................................... 265

[6] Compressor Replacement Instructions................................................................................. 267

[7] Troubleshooting Using the Outdoor Unit LED Error Display................................................. 269

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LED Monitor Display on the Outdoor Unit Board

[1] How to Read the LED on the Service Monitor ...................................................................... 273

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Read Before Servicing

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

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

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

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

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

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

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

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

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

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IRead Befo re Servicing

[1] Read Before Servicing

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

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

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

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

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

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

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

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

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

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

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

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

CAUTION

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

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[2] Necessary Tools and Materials

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

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

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

Tools/Materials Use Notes

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

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

Refrigerant Recovery Cylinder Refrigerant recovery

Refrigerant Cylinder Refrigerant charging The refrigerant type is indicated. The

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

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

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

Tools/Materials Use Notes

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

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

Flare Tool Flare processing Flare processing dimensions for the

Refrigerant Recovery Equipment Refrigerant recovery May be used if compatible with

high-pressure side

conventional model.

cylinder is pink.

than that of the current port.

may be used.

is attached.

piping in the system using the new refrigerant differ from those of R22. Refer to next page.

R410A.

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

Tools/Materials Use Notes

Vacuum Pump with a Check Valve Vacuum drying

Bender Bending pipes

Torque Wrench Tightening flare nuts Only the flare processing dimensions

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

Pipe Cutter Cutting pipes

Welder and Nitrogen Cylinder Welding pipes

Refrigerant Charging Meter Refrigerant charging

Vacuum Gauge Vacuum level check

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

Tools/Materials Use Notes

Charging Cylinder Refrigerant charging Prohibited to use

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

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[3] Piping Materials

Do not use the existing piping!

1. Copper pipe materials

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

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

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

selves.

O-materials (Annealed) can easily be bent with hands. 1/2H-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, R407C etc.

4.30 MPa [624psi] R410A etc.

3. Piping materials/Radial thickness

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

at the same radial thickness.

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

ø6.35 [1/4"] 0.8t

ø9.52 [3/8"] 0.8t

ø12.7 [1/2"] 0.8t

ø15.88 [5/8"] 1.0t

ø19.05 [3/4"] 1.0t

ø22.2 [7/8"] 1.0t

ø25.4 [1"] 1.0t

ø28.58 [1-1/8"] 1.0t

ø31.75 [1-1/4"] 1.1t

ø34.93 [1-3/8"] 1.1t

ø41.28 [1-5/8"] 1.2t

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

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

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

that meet the local standards.

O-material (Annealed)

1/2H-material,

H-material (Drawn)

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[ I Read Before Servicing ]

4. Thickness and refrigerant type indicated on the piping materials

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

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

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

Flare processing dimensions (mm[in])

Pipe size (mm[in])

A dimension (mm)

R410A R22, R407C

ø6.35 [1/4"] 9.1 9.0

ø9.52 [3/8"] 13.2 13.0

ø12.7 [1/2"] 16.6 16.2

Dimension A

ø15.88 [5/8"] 19.7 19.4

ø19.05 [3/4"] 24.0 23.3

If a clutch-type flare tool is used to flare the pipes in the system using R410A, the length of the pipes must be between 1.0 and 1.5 mm. For margin adjustment, a copper pipe gauge is necessary.

6. Flare nut

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

Flare nut dimensions (mm[in])

Pipe size (mm[in])

B dimension (mm)

R410A R22, R407C

ø6.35 [1/4"] 17.0 17.0

ø9.52 [3/8"] 22.0 22.0

ø12.7 [1/2"] 26.0 24.0

Dimension B

ø15.88 [5/8"] 29.0 27.0

ø19.05 [3/4"] 36.0 36.0

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

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[4] Storage of Piping

1. Storage location

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

2. Sealing the pipe ends

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

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

[5] Pipe Processing

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

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

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[6] Brazing

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

Example: Inside the brazed connection

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

1. Items to be strictly observed

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

copper coupling.

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

2. Reasons

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

water infiltrates into the system.

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

3. Notes

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

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[7] Air Tightness Test

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

Halide torch R22 leakage detector

1. Items to be strictly observed

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

ness, taking temperature variations into account.

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

2. Reasons

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

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

3. Notes

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

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[8] Vacuum Drying (Evacuation)

(Photo1) 15010H (Photo2) 14010

Recommended vacuum gauge: ROBINAIR 14010 Thermistor Vacuum Gauge

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

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

2. Standard of vacuum degree (Photo 2)

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

3. Required precision of vacuum gauge

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

4. Evacuation time

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

moves moisture in the pipes.)

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

1Torr(130Pa) is acceptable.

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

drying.

5. Procedures for stopping vacuum pump

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

6. Special vacuum drying

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

etrated the system or that there is a leak.

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

0.5kgf/cm

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

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

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

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[9] Refrigerant Charging

Cylinder with a siphon

Cylinder without a siphon

Cylin-

der

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

Valve Valve

liquid

1. Reasons

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

2. Notes

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

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

If the refrigerant leaks out, it may be replenished. The entire refrigerant does not need to be replaced. (Charge refrigerant in the liquid state.) Refer to "IX [5] Refrigerant Leak".(page 265)

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[ I Read Before Servicing ]

[11] Characteristics of the Conventional and the New Refrigerants

1. Chemical property

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

New Refrigerant (HFC type) Conventional Refriger-

ant (HCFC type)

R410A R407C R22

R32/R125 R32/R125/R134a R22

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

Type of Refrigerant Pseudo-azeotropic

Refrigerant

Non-azeotropic

Refrigerant

Single Refrigerant

Chloride Not included Not included Included

Safety Class A1/A1 A1/A1 A1

Molecular Weight 72.6 86.2 86.5

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

Steam Pressure

1.557/226 0.9177/133 0.94/136

(25°C,MPa/77°F,psi) (gauge)

Saturated Steam Density (25°C,kg/m

/77°F,psi)

64.0 42.5 44.4

Flammability Nonflammable Nonflammable Nonflammable

Ozone Depletion Coefficient (ODP)

Global Warming Coefficient (GWP)

Refrigerant Charging Method Refrigerant charging in

Replenishment of Refrigerant after a Refrigerant

0 0 0.055

1730 1530 1700

the liquid state

Refrigerant charging in

the liquid state

Refrigerant charging in

the gaseous state

Available Available Available

Leak

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

is used as a reference

2. Refrigerant composition

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

3. Pressure characteristics

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

Pressure (gauge)

Temperature (°C/°F)

R410A R407C R22

MPa/psi MPa/psi MPa/psi

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

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

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

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

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

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

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[ I Read Before Servicing ]

[12] Notes on Refrigerating Machine Oil

1. Refrigerating machine oil in the HFC refrigerant system

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

Refrigerant Refrigerating machine oil

R22 Mineral oil

R407C Ester oil

R410A Ester oil

2. Effects of contaminants

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

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

Cause Symptoms Effects on the refrigerant cycle

Water infiltration Frozen expansion valve

and capillary tubes

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

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

Burn-in on the orbiting scroll

Hydrolysis

Air infiltration Oxidization

Adhesion to expansion valve and capillary tubes

Dust, dirt

Infiltration of contaminants

Infiltration of contaminants into the compressor

Sludge formation and adhesion Acid generation Oxidization Oil degradation

Sludge formation and adhesion Clogged expansion valve and capillary tubes

Mineral oil etc.

Poor cooling performance Compressor overheat

Oil degradation Burn-in on the orbiting scroll

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

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- 14 -

Restrictions

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

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

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

[4] Sample System Connection............................................................................................. 26

[5] An Example of a System to which an MA Remote Controller is connected..................... 27

[6] An Example of a System to which an M-NET Remote Controller is connected............... 37

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

Controller are connected.................................................................................................. 39

[8] Restrictions on Pipe Length ............................................................................................. 41

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[ II Restrictions ]

IIRestrictions

[1] System configuration

1. Table of compatible indoor units

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

Outdoor

units

Composing units Maximum total capacity

of connectable indoor

units

Maximum number of connectable in-

door units

Types of connectable in-

door units

72 - - - 36 - 96 15 P06 - P96models

96 - - - 48 - 124 20

R410A series indoor units

120 - - - 60 - 156 26

144 72 72 - 72 - 187 31

168 96 72 - 84 - 218 36

192 120 72 - 96 - 249 41

216 120 96 - 108 - 280 46

240 120 120 - 120 - 312 50

264 120 72 72 132 - 343

288 120 96 72 144 - 374

312 120 120 72 156 - 405

336 120 120 96 168 - 436

360 120 120 120 180 - 468

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

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

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[ II Restrictions ]

[2] Types and Maximum allowable Length of Cables

1. Wiring work

(1) Notes

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

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

3) Provide grounding for the outdoor unit as required.

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

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

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

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

Outdoor unit

TB3TB7TB3TB

TB3TB

2-core shielded cable

TB3TB

2-core shielded cable

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

Indoor unit

Remote Controller

Outdoor unit

TB3TB7TB3TB

TB3TB

multiple-core cable

TB3TB

Indoor unit

Remote Controller

(2) Control wiring

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

Types and maximum allowable length of cables

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

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

1) M-NET transmission line

Cable type

Facility type

Type Shielded cable CVVS, CPEVS, MVVS

Number of cores

Cable size Larger than 1.25mm

All facility types

2-core cable

[AWG16]

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

200 m [656ft] max.

thest indoor unit

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

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

via outdoor unit)

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[ II Restrictions ]

2) Remote controller wiring

MA remote controller

M-NET remote controller

Type CVV CVV

Number of cores

Cable type

Cable size

Maximum overall line length

2-core cable 2-core cable

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

2 *3

2) *4

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

The section of the cable that exceeds 10m

200 m [656ft] max.

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

2 *3

2) *4

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

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

(AWG18) is recommended for easy handling.

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

cations shown in the parenthesis.

[3] Switch Settings and Address Settings

1. Switch setting

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

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

CITY MULTI indoor unit Main/sub unit IC Outdoor units

LOSSNAY, OA processing unit

LC Outdoor units

Air handling kit IC Outdoor units

and Indoor units

and LOSSNAY

or field supplied air handling

unit

M-NET remote controller Main/sub remote

RC Outdoor units

controller

MA remote controller Main/sub remote

MA Indoor units

controller

CITY MULTI outdoor unit

OC,OS1,OS2 Outdoor units

*1. Applicable when LOSSNAY units are connected to the indoor-outdoor transmission line. *2. The outdoor units in the same refrigerant circuit are automatically designated as OC, OS1, and OS2 in the order of

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

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

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[ II Restrictions ]

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

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

Unit or controller Address setting

Setting method Facto-

range

CITY MULTI indoor unit

Main/sub unit 00,

01 to 50

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.

M-NET adapter

M-NET control interface

Free Plan adapter

LOSSNAY, OA processing unit Air handling kit

00, 01 to 50

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

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 the same group.

151 to 200

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

remote controllers are connected to the system.)

CITY MULTI outdoor unit 00,

51 to 100

System controller Group remote

201 to 250 Assign an address that equals the sum of the smallest

controller

System remote controller

ON/OFF remote controller

Schedule timer (compatible

*1,*3

Assign sequential addresses to the outdoor units in the same refrigerant circuit. The outdoor units in the same refrigerant circuit are automatically designated as OC and OS.

group number of the group to be controlled and 200.

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

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

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

with M-NET)

Central controller G(B)-50A

000, 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 "000" 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.

ry set-

ting

101

Main

201

202

000

247

*1. Address setting is not required for a City Multi system that consists of a single refrigerant circuit (with some exceptions). *2. To set the M-NET remote controller address to "200", set the rotary switches to "00". *3. To set the outdoor unit address to "100," set the rotary switches to "50." *4. Some indoor units have 2 or 3 controller boards that require address settings.

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.

*5. The outdoor units in the same refrigerant circuit are automatically designated as OC, OS1, and OS2 in the order of

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

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[ II Restrictions ]

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

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

System configuration

Connection to the system controller

Power supply unit for transmission lines

Group operation of units in a system with multiple

Power supply switch connector connection

outdoor units

System with one outdoor unit

System with multiple outdoor units

_ _ _ Leave CN41 as it is

(Factory setting)

Not connected _ Not grouped

Grouped Disconnect the male connector from the fe-

With connection to the indoor unit system

With connection to the centralized control system

Not required Grouped/not

grouped

Not required (Powered from the

Grouped/not grouped

outdoor unit)

Required *

Grouped/not grouped

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

*Connect the S (shielded) terminal on the ter-

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

Leave CN41 as it is (Factory setting)

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

system.

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

System configuration Centralized control switch settings *

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

Connection to the system controller Connected *

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

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

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

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

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

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

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

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

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

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

Function

Power ON/OFF by the plug

*1,*2,*3

Automatic restoration after power failure

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

stopped

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

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

Indoor unit will remain stopped regardless of its operation status before power

Setting (SW1)

910

OFF ON

ON OFF

OFF ON

off (power failure).

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

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

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

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

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

*4 *5

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[ II Restrictions ]

(6) Miscellaneous settings

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

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

Type Usage Function

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

DEMAND (level) CN3D

input to the outdoor unit.

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

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

Low-noise mode

*3*4

(level)

to be

used

Option

Adapter for external input (PACSC36NA-E)

Terminal

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

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

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

Snow sensor signal

CN3S

input (level)

Auto-changeover CN3N

the outdoor unit.

Out-

How to extract signals from the outdoor unit

put

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

Operation status of the compressor

Error status

CN51 Adapter for

external output (PACSC37SA-E)

*1. For detailed drawing, refer to "Example of wiring connection".

*2. For details, refer to (1) through (4) shown below.

*3. Low-noise mode is valid when Dip SW4-4 on the outdoor unit is set to OFF. When DIP SW4-4 is set to ON, 4 levels of

on-DEMAND are possible, using different configurations of low-noise mode input and DEMAND input settings.When 2 or more outdoor units exist in one refrigerant circuit system, 8 levels of on-DEMAND are possible. When 3 outdoor units exist in one refrigerant circuitsystem, 12 levels of on-DEMAND are possible.

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

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

Low-noise mode is effective Capacity priority mode becomes effective

Cooling Heating Cooling Heating

TH7 < 30°C [86°F] and 63HS1 < 32kg/cm

TH7 > 3°C [37°F]

and 63LS > 4.6kg/cm

TH7 > 35°C [95°F] or 63HS1 > 35kg/cm

TH7 < 0°C [32°F]

or 63LS < 3.9kg/cm

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

CAUTION

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

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

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

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[ II Restrictions ]

Example of wiring connection

(1) CN51

Distant control board

ecruosrewoppmaL

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

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

(3) CN3N

Relay circuit

Preparations

in the field

Adapter

Maximum cable length is 10m

Relay circuit Adapter

X Y

Preparations

in the field

1 2

Maximum cable length is 10m

Outdoor unit control board

CN3N

(2) CN3S

5 4 3

Outdoor unit control board

CN51

Relay circuit

Preparations

in the field

X : Relay

Snow sensor : The outdoor fan runs when X is closed

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

in stop mode or thermostat mode.

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

OFF

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

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

Normal

CoolingONHeating

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

Adapter

1 2

Maximum cable length is 10m

Outdoor unit control board

CN3S

(4) CN3D

Relay circuit

Preparations

in the field

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

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

Adapter

Maximum cable length is 10m

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

1 2

Outdoor unit

control board

CN3D

1 2

Outdoor unit

control board

CN3D

Relay circuit

Adapter

Preparations

in the field

X : Low-noise mode X : Relay

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

Maximum cable length is 10m

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

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

fan frequency and maximum compressor frequency.

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[ II Restrictions ]

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

CN3D 1-3P Compressor ON/OFF

Open Compressor ON

Short-circuit Compressor OFF

CN3D 1-2P Low-noise mode

Open OFF

Short-circuit ON

*1. When SW4-4 on the outdoor unit in one refrigerant circuit system is set to ON , this function cannot be used. *2. This function and the 4 levels or 8 levels on-DEMAND function can be used together. Input the order to CN3D 1-2P on

the outdoor unit whose SW4-4 is set to OFF.

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

(*3)

CN3D 1-2P

CN3D 1-3P Open Short-circuit

Open 100% (No DEMAND) 75%

Short-circuit 0% (Compressor OFF) 50%

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

Note the following steps to be taken when using the STEP DEMAND

(Example) When switching from 100% to 50%

Demand control

steps

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

(Wrong)

(Correct)

100%

75%

50%

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

8 levels of on-DEMAND No.2 CN3D

1-2P Open Short-circuit

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

Open Open 100% 50% 88% 75%

Short-circuit 50% 0% 38% 25%

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

Short-circuit 75% 25% 63% 50%

*4. Input the order to CN3D on the outdoor unit whose SW4-4 is set to ON. *5. CN3D of No. 1, 2, 3 can be selected arbitrary with the outdoor unit whose SW4-4 is set to ON.

(*4, *5)

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[ II Restrictions ]

4) When SW4-4 on the all outdoor units in one refrigerant circuit system is set to ON (12 levels of on-DEMAND)

12 levels of on-DEMAND

No.2 CN3D 1-2P Open

1-3P Open Short-circuit

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

No.1 CN3D

1-2P 1-3P Open Short-

circuit

Open Short-

circuit

Open Short-

circuit

Open Short-

Open Open 100% 67% 92% 84% 67% 34% 59% 50%

Short-

67% 34% 59% 50% 34% 0% 25% 17%

circuit

Short-circuit Open 92% 59% 84% 75% 59% 25% 50% 42%

Short-

84% 50% 75% 67% 50% 17% 42% 34%

circuit

12 levels of on-DEMAND

No.2 CN3D 1-2P Short-circuit

1-3P Open Short-circuit

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

No.1 CN3D

1-2P 1-3P Open Short-

circuit

Open Short-

circuit

Open Short-

circuit

Open Short-

Open Open 92% 59% 84% 75% 84% 50% 75% 67%

Short-

59% 25% 50% 42% 50% 17% 42% 34%

circuit

Short-circuit Open 84% 50% 75% 67% 75% 42% 67% 59%

Short-

75% 42% 67% 59% 67% 34% 59% 50%

circuit

(*4)

circuit

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

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[ II Restrictions ]

[4] Sample System Connection

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

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

System

configuration

System with one out-

door unit

System with one out-

door unit

Grouping of units in a

system with multiple

outdoor units

System with one out-

door unit

System with one out-

door unit

Connection to the system controller

With connection to transmission line

for centralized control

With connection to indoor-outdoor

transmission line

Address start up for in-

door and outdoor units

Automatic

address setup

Manual

address setup

Manual

address setup

Manual

address setup

Manual

address setup

Notes

Connection of multiple LOSSNAY units

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

System

configuration

System with one out-

1. door unit

Connection to the system controller

With connection to transmission line

for centralized control

Address start up for indoor

and outdoor units

Manual

address setup

Notes

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

System

configuration

System with one out-

1. door unit

Connection to the system controller

With connection to transmission

line for centralized control

Address start up for indoor and outdoor units

Manual

address setup

Notes

HWE08040 GB

- 26 -

[ II Restrictions ]

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

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

Leave the male connector on CN41 as it is.

SW2-1 OFF

Leave the male connector on CN41 as it is.

SW2-1 OFF

OS1OS2

Leave the male connector on CN41 as it is.

SW2-1 OFF

TB7

TB3

TB7

M1 M2 M1 M2 M1 M2 M1 M2 M1 M2 M1 M2

TB3

L2L1

Group Group

0000

TB7

TB5STB

L3 L4

1 2

TB5STB

1 2

Interlock operation with the ventilation unit

TB5

M1M2M1M2M1M2

L11

A B

(2) Cautions

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

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

3) A transmission booster is required in a system to which more than 32 indoor units (26 units if one or more indoor units of the 72 model or above is connected) are connected.

4) Automatic address setup is not available if start-stop input (CN32, CN51, CN41) is used for a group operation of indoor units. Refer to "[5] 2. Manual address setup for both indoor and outdoor units".(page 29)

5) To connect more than 2 LOSSNAY units to indoor units in the same system, refer to the next section "[5] 2. An example of a system with one outdoor unit to which 2 or more LOSSNAY units are connected".(page 29)

A B

L12 L13

GroupGroup

A B

0000

TB5

M1M2 M1 M2 M1 M2

S 1 2

A B

TB5STB

1 2

A B

(3) Maximum allowable length

1) Indoor/outdoor transmission line

Maximum distance (1.25mm

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

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

3) MA remote controller wiring Maximum overall line length

(0.3 to 1.25mm

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

TB5STB

1 2

HWE08040 GB

27- 27 -

[ II Restrictions ]

(4) Wiring method

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

for indoor-outdoor transmission line (TB3) on the outdoor units (OC, OS1, OS2) (Note 1), and terminals M1 and M2 on the terminal block for indoor-outdoor transmission line (TB5) on each indoor unit (IC). (Non-polarized two-wire)

Only use shielded cables.

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

Shielded cable connection

Daisy-chain the ground terminal ( ) on the outdoor units (OC, OS1, OS2), and the S terminal on the terminal block (TB5) on the indoor unit (IC) with the shield wire of the shielded cable.

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

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

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

When 2 remote controllers are connected to the system

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

Set one of the MA remote controllers to sub. (Refer to

(5) Address setting method

MA remote controller function selection or the installation manual for the MA remote controller for the setting method.)

Group operation of indoor units

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

When performing a group operation of indoor units that

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

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

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

Interlock operation setting with all the indoor units in the

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

Refer to "[5] 2. Manual address setup for both indoor and

outdoor units" in the following cases: performing 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.

Proce-

dures

Unit or controller

1 Indoor unit Main unit IC No settings re-

Sub unit IC

Address setting

range

quired.

Setting

method

Notes

- To perform a group operation of indoor units that have different functions, refer to [5] 2.(page 29)

2 LOSSNAY LC No settings re-

-00

quired.

3MA

remote controller

Main remote controller

Sub remote controller

MA No settings re-

quired.

MA Sub

remote controller

-Main

Settings to be made according to the remote controller function selection

4 Outdoor unit (Note) OC

OS1

No settings required.

-00

OS2

The outdoor units in the same refrigerant circuit are automatically designated as OC, OS1, and OS2.

Factory

setting

- 28 -

GBHWE08040

[ II Restrictions ]

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

(1) Sample control wiring

Leave the male connector on CN41 as it is.

SW2-1 OFF

Leave the male connector on CN41 as it is.

SW2-1 OFF

Leave the male connector on CN41 as it is.

SW2-1 OFF

TB7

TB3

TB7

M1 M2 M1 M2 M1 M2 M1 M2 M1 M2 M1 M2

TB3

OCOS1OS2

5152

TB7

TB5STB

M1M2 M1 M2 M1 M2

L3 L4

GroupGroup

1 2

TB5STB

1 2

TB5

Interlock operation with the ventilation unit

L11

(2) Cautions

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

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

3) A transmission booster is required in a system to which more than 32 indoor units (26 units if one or more indoor units of the 72 model or above is connected) are connected.

A B

L12 L13

Group

A B

0403

TB5

1 2

A B

TB5STB

1 2

(3) Maximum allowable length

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

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

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

TB5

M1M2M1M2M1M2

HWE08040 GB

29- 29 -

[ II Restrictions ]

(4) Wiring method

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

Shielded cable connection

Same as [5] 1.

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

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

When 2 remote controllers are connected to the system

Same as [5] 1.

Group operation of indoor units

Same as [5] 1.

(5) Address setting method

Proce-

dures

Unit or controller

1 Indoor unit Main

IC 01 to 50 Assign the smallest ad-

Address

setting

unit

Sub unit Assign sequential numbers

2 LOSSNAY LC 01 to 50 Assign an arbitrary but

3MA

remote controller

Main remote control-

MA No

settings required.

ler

Sub remote control-

MA Sub

remote controller

ler

4 Outdoor unit OC

51 to 100 Assign sequential address OS1 OS2

range

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

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

Interlock setting between the indoor units and LOSS-

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

5) Switch setting Address setting is required as follows.

Setting method Notes

To perform a group operadress to the main unit in the group.

tion of indoor units that

have different functions,

designate the indoor unit

starting with the address of the main unit in the same group +1. (Main unit ad-

in the group with the great-

est number of functions as

the main unit.

dress +1, main unit address +2, main unit address +3, etc.)

None of these addresses unique address to each of these units after assigning

may overlap any of the in-

door unit addresses. an address to all indoor units.

-Main

Settings to be made according to the remote controller function selection

To set the address to 100, to the outdoor units in the same refrigerant circuit.

set the rotary switches to

50. The outdoor units are automatically designated as OC, OS1, and OS2.(Note)

Factory

setting

The outdoor units in the same refrigerant circuit are automatically designated as OC, OS1, and OS2.

- 30 -

GBHWE08040

[ II Restrictions ]

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

L11

Leave the male connector on CN41 as it is.

SW2-1 OFF

OS2

TB3

M1 M2 M1 M2 M1 M2

TB7

M1 M2 M1 M2 M1 M2

Leave the male connector on CN41 as it is.

SW2-1 OFF

OS1

TB3

Not connect

TB7

CN41 CN40 Replace

SW2-1 OFF

Not connect

TB3

TB7

Group

Connect

TB5STB

1 2

M1M2 M1 M2 M1 M2 M1 M2

A B

Interlock operation with

L12

Group

TB5STB

1 2

A B

the ventilation unit

Group

TB5STB

1 2

A B

TB5

L31

Leave the male connector on CN41 as it is.

SW2-1 OFF

OS2

TB3

M1 M2 M1 M2 M1 M2

TB7

M1 M2 M1 M2 M1 M2

Not connect

L21

Leave the male connector on CN41 as it is.

SW2-1 OFF

TB3

TB7

OS1

Leave the male connector on CN41 as it is.

SW2-1 OFF

Not connect

TB5

M1M2

TB3

TB7

Not connect

(2) Cautions

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

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

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

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

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

6) A transmission booster is required in a system to which more than 32 indoor units (26 units if one or more indoor units of the 72 model or above is connected) are connected.

L22

1 2

Group

0402

TB5STB

1 2 1 2

A B

TB5 TB15

M1M2M1M2

(3) Maximum allowable length

1) Indoor/outdoor transmission line

Maximum distance (1.25mm

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

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

(1.25mm

[AWG16] or larger)

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

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

HWE08040 GB

31- 31 -

[ II Restrictions ]

(4) Wiring method

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

Only use shielded cables.

Shielded cable connection

Same as [5] 1.

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

3) MA remote controller wiring

for transmission line for centralized control (TB7) on the outdoor units (OC) in different refrigerant circuits and on the OC, OS1, and OS2 in the same refrigerant circuit If a power supply unit is not connected to the transmission line for centralized control, replace the power jumper connector on the control board from CN41 to CN40 on only one of the outdoor units.

The outdoor units in the same refrigerant circuit are automatically designated as OC, OS1, and OS2 in the or-

4) LOSSNAY connection

5) Switch setting

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

(5) Address setting method

Proce-

dures

1 Indoor

Unit or controller

Main unit IC 01 to 50 Assign the smallest ad-

unit

Address setting

range

dress to the main unit in the group.

Sub unit Assign sequential num-

bers 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.)

2 LOSSNAY LC 01 to 50 Assign an arbitrary but

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

3MA

remote controller

Main remote controller

Sub remote controller

4 Outdoor unit OC

MA No

settings required.

MA Sub

remote controller

Settings to be made according to the remote controller function selection

51 to 100 Assign sequential address OS1 OS2

to the outdoor units in the same refrigerant circuit. The outdoor units are automatically designated as OC, OS1, and OS2. (Note)

Only use shielded cables.

Shielded cable connection

Daisy-chain the S terminal on the terminal block (TB7) on the outdoor units (OC, OS1, OS2) with the shield wire of the shielded cable. Short-circuit the earth terminal ( ) and the S terminal on the terminal block (TB7) on the outdoor unit whose power jumper connector is mated with CN40.

Same as [5] 1.

When 2 remote controllers are connected to the system

Same as [5] 1.

Group operation of indoor units

Same as [5] 2.

Address setting is required as follows.

Setting method Notes

To perform a group

Factory

setting

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

None of these ad-

00 dresses may overlap any of the indoor unit addresses.

-Main

To set the address to

00 100, set the rotary switches to 50.

The outdoor units in the same refrigerant circuit are automatically designated as OC, OS1, and OS2.

- 32 -

GBHWE08040

[ II Restrictions ]

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

(1) Sample control wiring

Interlock operation with

1 2

the ventilation unit

TB5STB

1 2

TB5

Leave the male connector on CN41 as it is.

SW2-1 OFF ON

OS2

TB3

M1 M2 M1 M2 M1 M2

Leave the male connector on CN41 as it is.

SW2-1 OFF ON

OS1

TB3

CN41 CN40 Replace

SW2-1 OFF ON

TB3

L12L11

Group Group Group

TB5STB

1 2

M1 M2 M1 M2 M1 M2 M1 M2

TB5STB

L31

TB7

M1 M2 M1 M2 M1 M2

Not connect

Leave the male connector on CN41 as it is.

SW2-1 OFF ON

OS2

TB3

M1 M2 M1 M2 M1 M2

TB7

M1 M2 M1 M2 M1 M2

Not connect

TB7

Leave the male connector on CN41 as it is.

SW2-1 OFF ON

OS1

TB3

TB7

Not connect

Leave the male connector on CN41 as it is.

SW2-1 OFF ON

TB7

Connect

TB3

TB7

Not connect

System controller

A B S

L32

TB5

Note1

A B

L22L21

1 2

A B

TB5STB

m2 m1

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.

A B

GroupGroup

0504

1 2

TB5STB

1 2

A B

TB5

M1 M2 M1 M2 M1 M2 M1 M2

(2) Cautions

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

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

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

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

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

(3) Maximum allowable length

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

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

(1.25mm

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

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

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

6) A transmission booster is required in a system to which more than 32 indoor units (26 units if one or more indoor units of the 72 model or above is connected) are connected.

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

HWE08040 GB

33- 33 -

[ II Restrictions ]

(4) Wiring method

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

Shielded cable connection

Same as [5] 1.

2) Transmission line for centralized control Daisy-chain terminals A and B on the system controller,

terminals M1 and M2 on the terminal block for transmission line for centralized control (TB7) on the outdoor units (OC) in different refrigerant circuits and on the outdoor units (OC, OS1, and OS2) in the same refrigerant circuit. If a power supply unit is not connected to the transmission line for centralized control, replace the power jumper connector on the control board from CN41 to CN40 on only one of the outdoor units. If a system controller is connected, set the central control switch (SW2-1) on the control board of all outdoor units to "ON."

Only use shielded cables.

(5) Address setting method

Shielded cable connection

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

When 2 remote controllers are connected to the system

Same as [5] 1.

Group operation of indoor units

Same as [5] 1.

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

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

Proce-

dures

Unit or controller

Address

setting

range

Setting method Notes

1 Indoor unit Main unit IC 01 to 50 Assign the smallest ad-

dress to the main unit in the group.

Sub unit Assign sequential num-

bers 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.)

2 LOSSNAY LC 01 to 50 Assign an arbitrary but

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

3MA

remote controller

Main remote control-

MA No

settings required.

- Enter the same indoor

ler

Sub remote controller

4 Outdoor unit OC

MA Sub

remote controller

51 to 100 Assign sequential adOS1 OS2

Settings to be made according to the remote controller function selection

dress to the outdoor units in the same refrigerant circuit. The outdoor units are automatically designated as OC, OS1, and OS2.(Note)

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

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 the rotary switches to 50.

Factory

setting

Main

The outdoor units in the same refrigerant circuit are automatically designated as OC, OS1, and OS2.

- 34 -

GBHWE08040

[ II Restrictions ]

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

(1) Sample control wiring

Interlock operation with

1 2

the ventilation unit

TB5STB

1 2

TB5

Leave the male connector on CN41 as it is.

SW2-1 OFF ON

OS2

TB3

M1 M2 M1 M2 M1 M2

Leave the male connector on CN41 as it is.

SW2-1 OFF ON

OS1

TB3

CN41 CN40 Replace

SW2-1 OFF ON

TB3

L12L11

Group Group Group

TB5STB

M1 M2 M1 M2 M1 M2 M1 M2

1 2

TB5STB

L31

TB7

M1 M2 M1 M2 M1 M2

Leave the male connector on CN41 as it is.

SW2-1 OFF ON

OS2

Not connect

TB3

M1 M2 M1 M2 M1 M2

TB7

M1 M2 M1 M2 M1 M2

Not connect

TB7

Leave the male connector on CN41 as it is.

SW2-1 OFF ON

OS1

TB3

TB7

Not connect

TB7

Leave the male connector on CN41 as it is.

SW2-1 OFF ON

TB3

TB7

Not connect

Connect

L25

System controller

TB5

A B S

A B

L22L21

m2 m1

TB5STB

M1 M2 M1 M2

1 2

A B

Note1

A B

GroupGroup

0504

1 2

M1 M2

TB5STB

1 2

A B

TB5

M1 M2

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

(2) Cautions

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

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

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

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

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

(3) Maximum allowable length

1) Indoor/outdoor transmission line

Maximum distance (1.25mm

[AWG16] or larger) L11+L12 200m [656ft] L21+L22 200m [656ft] L25 200m [656ft]

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

(1.25mm

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

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

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

HWE08040 GB

35- 35 -

[ II Restrictions ]

(4) Wiring method

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

for indoor-outdoor transmission line (TB3) on the outdoor units (OC, OS1, OS2) (Note 1), terminals M1 and M2 on the terminal block for indoor-outdoor transmission line (TB5) on each indoor unit (IC), and the S terminal on the system controller. (Non-polarized two-wire)

Only use shielded cables.

Shielded cable connection

Daisy-chain the ground terminal ( ) on the outdoor units (OC, OS1, OS2), the S terminal on the terminal block (TB5) on the indoor unit (IC), and the S terminal on the system controller with the shield wire of the shielded cable.

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

for transmission line for centralized control (TB7) on the outdoor units (OC) in different refrigerant circuits and on the OC, OS1, and OS2 in the same refrigerant circuit. If a power supply unit is not connected to the transmission line for centralized control, replace the power jumper connector on the control board from CN41 to CN40 on only one of the outdoor units.

(5) Address setting method

Set the central control switch (SW2-1) on the control board of all outdoor units to "ON."

Only use shielded cables.

Shielded cable connection

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

When 2 remote controllers are connected to the system

Same as [5] 1.

Group operation of indoor units

Same as [5] 1.

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

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

Indoor units must be interlocked with the LOSSNAY unit

5) Switch setting Address setting is required as follows.

Proce-

dures

1 Indoor

Unit or controller

Main unit IC 01 to 50 Assign the smallest address

unit

Address set-

ting range

Setting method Notes

to the main unit in the group.

Sub unit 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.)

2 LOSSNAY LC 01 to 50 Assign an arbitrary but

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

3MA

remote controller

4 Outdoor unit OC

Main remote controller

Sub remote controller

MA No

settings required.

MA Sub

remote controller

Settings to be made according to the remote controller function selection

51 to 100 Assign sequential address to OS1 OS2

the outdoor units in the same refrigerant circuit.

- Enter the same indoor unit

The outdoor units are automatically designated as OC, OS1, and OS2. (Note)

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

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

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

To set the address to 100, set the rotary switches to 50.

Factory

setting

Main

The outdoor units in the same refrigerant circuit are automatically designated as OC, OS1, and OS2.

- 36 -

GBHWE08040

[ II Restrictions ]

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

(1) Sample control wiring

Interlock operation with

1 2

the ventilation unit

GroupGroupGroup

TB5STB

1 2

Leave the male connector on CN41 as it is.

SW2-1 OFF ON

OS2

TB3

M1 M2 M1 M2 M1 M2

Leave the male connector on CN41 as it is.

SW2-1 OFF ON

OS1

TB3

CN41 CN40 Replace

SW2-1 OFF ON

TB3

L12L11

TB5STB

M1 M2 M1 M2 M1 M2 M1 M2

1 2

TB5STB

TB5

TB7

Leave the male connector on CN41 as it is.

SW2-1 OFF ON

TB3

TB7

Not connect

System controller

Connect

A B S

A B

101

Group

TB5

A B

154

L32

104

Note1

A B

102

L22L21

Group

A B

103

0504

TB5STB

1 2

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.

1 2

TB5STB

A B

106

1 2

TB5

M1 M2 M1 M2 M1 M2 M1 M2

Not connect

TB7

Leave the male connector on CN41 as it is.

SW2-1 OFF ON

OS1

TB3

TB7

Not connect

TB7

M1 M2 M1 M2 M1 M2

Leave the male connector on CN41 as it is.

SW2-1 OFF ON

L31

OS2

TB3

M1 M2 M1 M2 M1 M2

TB7

M1 M2 M1 M2 M1 M2

(2) Cautions

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

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

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

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

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

6) A transmission booster must be connected to a system in which the total number of connected indoor units exceeds 20.

7) A transmission booster is required in a system to which more than 16 indoor including one or more indoor units

(3) Maximum allowable length

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

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

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

(0.3 to 1.25mm

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

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

[AWG18-14].

of the 72 model or above are connected.

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

HWE08040 GB

37- 37 -

[ II Restrictions ]

(4) Wiring method

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

Shielded cable connection

Same as [5] 1.

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

Shielded cable connection

Same as [5] 4.

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

the indoor-outdoor transmission line.

(5) Address setting method

Proce-

dures

1 Indoor

Unit or controller

Main unit IC 01 to 50 Assign the smallest ad-

unit

Sub unit Assign sequential num-

2 LOSSNAY LC 01 to 50 Assign an arbitrary but

3M-NET

remote controller

Main remote controller

Sub

RC 101 to 150 Add 100 to the main unit

RC 151 to 200 Add 150 to the main unit remote controller

4 Outdoor unit OC

51 to 100 Assign sequential adOS1 OS2

Address setting

range

When 2 remote controllers are connected to the system

Refer to the section on Switch Setting.

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

Refer to the section on Switch Setting.

4) LOSSNAY connection Same as [5] 4.

5) Switch setting Address setting is required as follows.

Setting method Notes

To perform a group dress to the main unit in the group.

operation of indoor

units that have differ-

ent functions, desig-

bers starting with the address of the main unit in the same group +1. (Main unit address +1, main unit address +2,

nate the indoor unit in

the group with the

greatest number of

functions as the main

unit.

main unit address +3, etc.)

None of these adunique address to each of these units after assigning an address to all

dresses may overlap

any of the indoor unit

addresses. indoor units.

It is not necessary to

address in the group

set the 100s digit.

To set the address

to 200, set the rota-

address in the group

ry switches to 00.

To set the address to dress to the outdoor units in the same refrig-

100, set the rotary

switches to 50. erant circuit. The outdoor units are automatically designated as OC, OS1, and OS2. (Note)

Factory

setting

101

The outdoor units in the same refrigerant circuit are automatically designated as OC, OS1, and OS2.

- 38 -

GBHWE08040

[ II Restrictions ]

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

(1) Sample control wiring

Leave the male connector on CN41 as it is.

SW2-1 OFF ON

TB3

M1 M2 M1 M2 M1 M2

L11 L12

Leave the male connector on CN41 as it is.

SW2-1 OFF ON

TB3

CN41 CN40 Replace

SW2-1 OFF ON

OCOS1OS2

515253

TB3

Group Group

TB5 TB

M1 M2

1 2

TB5 TB

M1 M2

1 2

TB5 TB

M1 M2

1 2

Not connect

TB7

Leave the male connector on CN41 as it is.

SW2-1 OFF ON

TB3

TB7

Not connect

System controller

A B S

TB7

M1 M2 M1 M2 M1 M2

Leave the male connector on CN41 as it is.

SW2-1 OFF ON

L31

OS2

TB3

M1 M2 M1 M2 M1 M2

TB7

M1 M2 M1 M2 M1 M2

TB7

Not connect

L21 L22

Leave the male connector on CN41 as it is.

SW2-1 OFF ON

OS1

TB3

TB7

(2) Cautions

1) Be sure to connect a system controller.

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

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

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

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

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

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

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

9) A transmission booster must be connected to a system in which the total number of connected indoor units exceeds 20.

10) A transmission booster is required in a system to which more than 16 indoor including one or more indoor units of the 72 model or above are connected.

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

Connect

L32

Note1

TB5

M1 M2

A B

GroupGroup

0403

1 2

A B

TB5 TB

M1 M2

1 2

A B

104

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.

A B

106

TB5 TB

M1 M2

1 2

(3) Maximum allowable length

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

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

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

4) M-NET remote controller wiring Same as [5] 1.

HWE08040 GB

39- 39 -

[ II Restrictions ]

(4) Wiring method

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

Shielded cable connection

Same as [5] 1.

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

Shielded cable connection

Same as [5] 4.

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

When 2 remote controllers are connected to the system

(5) Address setting method

Proce-

dures

1Opera-

tion with the MA re-

Unit or controller

In-

Main unit IC 01 to 50 door unit

Sub unit

mote controller

MA remote controller

Main re-

mote con-

troller

Sub

remote

MA No

MA Sub

controller

2Opera-

tion with the

Indoor unit

M-NET remote

Main unit IC 01 to 50 Assign the smallest ad-

Sub unit

controller

MNET remote controller

Main re-

mote con-

troller

Sub

remote

controller

RC 101 to

RC 151 to

3 LOSSNAY LC 01 to 50

4 Outdoor unit OC

OS1 OS2

Address

setting

range

settings required.

remote controller

150

200

51 to 100

Same as [5] 1.

Group operation of indoor units

Same as [5] 1.

4) M-NET remote controller wiring Same as [5] 1.

When 2 remote controllers are connected to the system

Same as [5] 1.

Group operation of indoor units

Same as [5] 1.

5) LOSSNAY connection Same as [5] 4.

6) Switch setting Address setting is required as follows.

Setting method Notes

Assign the smallest address to the main unit in the group.

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

Settings to be made according to the remote controller function selection

dress to the main unit in the group.

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

Add 100 to the main unit address in the group.

Add 150 to the main unit

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.

To perform a group operation

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

Enter the indoor unit group set-

tings on the system controller (MELANS).

Assign an address larger than

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

To perform a group operation

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

It is not necessary to set

the 100s digit.

To set the address to 200,

set the rotary switches to

00.

address in the group.

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

Assign sequential address to the outdoor units in the same refrigerantcircuit. The outdoor units are automatically designated as OC, OS1, and OS2.(Note)

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

To set the address to 100, set the rotary switches to 50.

Factory

setting

Main

101

The outdoor units in the same refrigerant circuit are automatically designated as OC, OS1, and OS2.

- 40 -

GBHWE08040

[ II Restrictions ]

[8] Restrictions on Pipe Length

(1) End branching

P72 - P120 models

Outdoor unit

First branch (Branch joint)

Branch joint

(Outdoor unit above indoor unit)

(Outdoor unit below indoor unit)

' H

Indoor Indoor Indoor

Operation Pipe sections

Length Total pipe length A+B+C+D

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

Height difference

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

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

Between indoor and outdoor units

Outdoor unit above indoor unit

Outdoor unit below in-

A+B+C+c or

A+D+f

B+C+c or

D+f

H 50 [164] or less

H' 40 [131] or less

door unit

Between indoor units h 15 [49] or less

Branch header

cap

Allowable length of

pipes

1000 [3280] or less

165 [541] or less

(Equivalent length 190

[623] or less)

40 [131] or less

Unit: m [ft]

HWE08040 GB

- 41 -

[ II Restrictions ]

P144 - P360 models The figure shows a system with three outdoor units. (P264-P360 models)

Note1 Install the pipe that connects the branch pipe and the outdoor units in

the way that it has a downward inclination toward the branch pipe.

Provide a trap on the pipe (gas pipe only) within 2 m from the joint pipe if the total length of the pipe that connects the joint pipe and the outdoor unit exceeds 2 m.

B DA

Second gas refrigerant distributor Second liquid refrigerant distributor

First liquid refrigerant distributor First gas refrigerant distributor

First branch

Downward inclination

Upward inclination

To indoor unit

(Note)

E F G I

Indoor Indoor Indoor Indoor

J K M

Indoor Indoor Indoor Indoor

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

Operation Pipe sections

2m [6ft]

2m [6ft] Max.

To indoor unit Joint pipe

Trap (gas pipe only)

To downstream units

Allowable length of

To indoor unit Joint pipe

pipes

Length Between outdoor units A+B+C+D 10 [32] or less

Total pipe length A+B+C+D+E+F+G+I+J

1000 [3280] or less

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

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

Total pipe length from the first branch to the far-

A(B)+C+E+J+K+M+i

G+I+J+i 40 [131] or less

165 [541] or less

(Equivalent length 190

[623] or less)

thest indoor unit ( )

Height difference

Between indoor and outdoor units H 50 [164] or less

(40 [131] or below if

outdoor unit is below in-

door unit)

Between indoor units h1 15 [49] or less

Between outdoor units h2 0.1[0.3] or less

Unit: m [ft]

HWE08040 GB

- 42 -

[ II Restrictions ]

1. Refrigerant pipe size (1) Diameter of the refrigerant pipe between the outdoor unit and the first branch (outdoor unit pipe size)

Outdoor unit set name

Liquid pipe size (mm) [inch] Gas pipe size (mm) [inch]

(total capacity)

72 model ø9.52 [3/8"] ø19.05 [3/4"]

96 model ø9.52 [3/8"]

120 model ø9.52 [3/8"]

ø22.2 [7/8"]

144 model ø12.7 [1/2"] ø28.58 [1-1/8"]

168 model ø15.88 [5/8"] ø28.58 [1-1/8"]

192 model ø15.88 [5/8"] ø28.58 [1-1/8"]

216 model ø15.88 [5/8"] ø28.58 [1-1/8"]

240 model ø15.88 [5/8"] ø28.58 [1-1/8"]

264 - 312 model ø19.05 [3/4"] ø34.93 [1-3/8"]

336 - 360 model ø19.05 [3/4"] ø41.28 [1-5/8"]

*1. Use ø12.7 [1/2"] pipes if the piping length exceeds 90 m [295 ft].

*2. Use ø12.7 [1/2"] pipes if the piping length exceeds 40 m [131 ft].

(2) Size of the refrigerant pipe between the first branch and the indoor unit (indoor unit pipe size)

model Pipe diameter (mm) [inch]

06 - 15 models Liquid pipe ø6.35 [1/4"]

Gas pipe ø12.7 [1/2"]

18 - 54 models Liquid pipe ø9.52 [3/8"]

Gas pipe ø15.88 [5/8"]

72 model Liquid pipe ø9.52 [3/8"]

Gas pipe ø19.05 [3/4"]

96 model Liquid pipe ø9.52 [3/8"]

Gas pipe ø22.2 [7/8"]

(3) Size of the refrigerant pipe between the branches for connection to indoor units

Total capacity of the

Liquid pipe size (mm) [inch] Gas pipe size (mm) [inch]

downstream units

- 54 ø9.52 [3/8"] ø15.88 [5/8"]

P55 - P72 ø9.52 [3/8"] ø19.05 [3/4"]

P72 - P108 ø9.52 [3/8"] ø22.2 [7/8"]

P109 - P144 ø12.7 [1/2"] ø28.58 [1-1/8"]

P145 - P240 ø15.88 [5/8"] ø28.58 [1-1/8"]

P241 - P308 ø19.05 [3/4"] ø34.93 [1-3/8"]

P309 - ø19.05 [3/4"] ø41.28 [1-5/8"]

HWE08040 GB

- 43 -

[ II Restrictions ]

(4) Size of the refrigerant pipe between the first distributor and the second distributor

Liquid pipe size (mm) [inch] Gas pipe size (mm) [inch]

ø19.05 [3/4"] ø34.93 [1-3/8"]

(5) Size of the refrigerant pipe between the first distributor or the second distributor and outdoor units

Liquid pipe size (mm) [inch] Gas pipe size (mm) [inch]

72 model ø9.52 [3/8"] ø22.2 [7/8"]

96 model

120 model ø12.7 [1/2"]

* Only applicable to the 120 model and below

HWE08040 GB

- 44 -

III

Outdoor Unit Components

[1] Outdoor Unit Components and Refrigerant Circuit .......................................................... 47

[2] Control Box of the Outdoor Unit....................................................................................... 49

[3] Outdoor Unit Circuit Board............................................................................................... 52

HWE08040 GB

- 45 -

- 46 -

[ III Outdoor Unit Components ]

III Outdoor Unit Components

[1] Outdoor Unit Components and Refrigerant Circuit

1. PUHY-P72, P96, P120THMU-A PUHY-P72, P96, P120YHMU-A

(1) Front view of a outdoor unit

Fan guard

Fan

Fin guard

Heat exchanger

Front panel

Control Box

HWE08040 GB

- 47 -

[ III Outdoor Unit Components ]

2. PUHY-P72, P96THMU-A PUHY-P72, P96YHMU-A

(1) Refrigerant circuit

Check valve

4-way valve(21S4b)

4-way valve(21S4a)

Subcool coil

Linear Expansion Valve(LEV1)

Solenoid valve(SV5b)

Linear Expansion Valve(LEV2a,2b)

Liquid side valve

Low pressure sensor(63LS)

Gas side valve

Solenoid valve (SV1a)

Solenoid valve (SV9)

High pressure sensor(63HS1)

High-pressure switch(63H1)

Transformer Box (YHMU-A only)

Accumulator

Low pressure check joint

High pressure check joint

Compressor cover

Compressor

Oil separator

3. PUHY- P120THMU-A PUHY- P120YHMU-A

(1) Refrigerant circuit

4-way valve(21S4c)

High pressure check joint

Low pressure check joint

Solenoid valve(SV5c)

Linear Expansion Valve

(LEV2a,2b)

Linear Expansion

Valve(LEV1)

Solenoid valve(SV5b)

Liquid side valve

Subcool coil

4-way valve(21S4a)

4-way valve(21S4b)

Solenoid valve (SV9)

Gas side valve

Low pressure sensor(63LS)

Check valve

Solenoid valve (SV1a)

Accumulator

Transformer Box (YHMU-A only)

High pressure sensor(63HS1)

High-pressure switch(63H1)

Compressor cover

Compressor

Oil separator

HWE08040 GB

- 48 -

[ III Outdoor Unit Components ]

[2] Control Box of the Outdoor Unit

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

1. PUHY-P72, P96THMU-A

DC reactor (DCL)

Electromagnetic relay(72C)

Rush current protection resistor (R1) Note.2

Noise filter

Note.2

Terminal block for

power supply

(TB1)

Note.1

Ground terminal

Fan board

INV board

Smoothing capacitor(C1)

Control board

M-NET board

Terminal block for transmission line (TB3, TB7)

1) Exercise caution not to damage the bottom and the front panel of the control box. Damage to these parts affect the waterproof and dust proof properties of the control box and may result in damage to its internal components.

2) Faston terminals have a locking function. Make sure the cable heads are securely locked in place. Press the tab on the terminals to remove them.

HWE08040 GB

- 49 -

[ III Outdoor Unit Components ]

2. PUHY-P120THMU-A

DC reactor (DCL)

Electromagnetic relay

(72C)

Diode stack

Noise filter

Current sensor

(ACCT3)

Current sensor

(DCCT1)

Terminal block for

power supply

(TB1)

Ground terminal

Smoothing capacitor(C1)

3. PUHY-P72, P96, P120YHMU-A

Note.2

Note.1

Fan board

Current sensor (ACCT2)

INV board Control board

IPM

Current sensor (ACCT1)

Terminal block for transmission line (TB3, TB7)

M-NET board

Electromagnetic relay(72C)

DC reactor (DCL)

Noise filter

Terminal block for power supply

(TB1)

Fuse(F4)

Capacitor(C100)

Rush current protection resistor (R1,R5) Note.2

Fan board

Control board

M-NET board

Fuse(F5)

Ground terminal

Note.1

INV board

Terminal block for transmission line (TB3, TB7)

2) Faston terminals have a locking function. Make sure the cable heads are securely locked in place. Press the tab on the terminals to remove them.

HWE08040 GB

- 50 -

[ III Outdoor Unit Components ]

4. Transformer Box (PUHY-P72, P96, P120YHMU-A)

Transformer (T03)

Transformer (T02)

HWE08040 GB

- 51 -

[ III Outdoor Unit Components ]

[3] Outdoor Unit Circuit Board

1. Outdoor unit control board

CNAC2 L1 L2

CN505 72C driving output (THMU)

CN51

Output 12VDC Compressor ON/OFF output

Error output

Actuator driving output

CN72 72C driving output (YHMU)

CNDC Bus voltage input P N

CN2

Serial communication signal input

INV board

GND Output 17VDC

CN801 Pressure switch connection

CN332 Output 18VDC GND (Fan board)

CN4 GND Serial communication signal output

LEV driving output

LED1 Service LED

SWU1,2 Address switch

SW1-5

switch

Dip

Sensor input

LED3 Lit when powered

LED2 Lit during normal CPU operation

HWE08040 GB

CNAC L1 L2

LED3 Lit when powered

F01 Fuse 250V AC/3.15A

External signal input (contact input)

CN102

Power supply input for centralized control system (30VDC) Indoor/outdoor transmission line input/output (30VDC)

- 52 -

CN41 Power supply for

CN40

centralized control OFF Power supply for centralized control ON

CNVCC2 Output 12VDC Output 5VDC

CNIT Output 12VDC GND Output 5VDC Power supply detection input

Power supply ON/OFF signal output CNS2 Transmission line input/output for centralized control system (30VDC)

GND

[ III Outdoor Unit Components ]

2. M-NET board

(THMU only) F01 250V

3.15A

Grounding

CN03(THMU only) Bus voltage input P N

CN04 Bus voltage input (YHMU only) Bus voltage output (THMU only) P N

CN102

Power supply output for centralized control system (30VDC) Indoor/outdoor transmission line input/output (30VDC)

Grounding

TB3 Indoor/outdoor transmission block

Ground terminal for transmission line

CNS2 Transmission line input/output for centralized control system (30VDC)

TB7 Terminal block for transmission line for centralized control

CNIT Input 12VDC GND Input 5VDC Power supply detection output Power supply ON/OFF signal input

LED1 Power supply for indoor transmission line

TP1,2 Check pins for indoor/outdoor transmission line

HWE08040 GB

- 53 -

[ III Outdoor Unit Components ]

3. INV board (1) PUHY-P72, P96THMU-A

SC-P1 Rectifier diode output (P)

C30,31,32 Smoothing capacitor

RSH1,2 Overcurrent detection resistor

CN6 Open: No-load operation setting Short-circuited: Normal setting

IGBT (Rear)

CN5V GND Output 5VDC

LED1 Lit: Inverter in normal operation Blink: Inverter error

CN4 GND

Serial communication signal output

CNDC Bus voltage output P N

(INV Boar)

CN2

erial communication signal output

SC-P2 Bus voltage Input(

TB-P(Note) Bus voltage output(P

)

TB-N(Note) Bus voltage output

(N)

SC-T Input(L3)

CT3 Current sensor(

L3)

SC-S Input(L2)

SC-R Input(L1)

CT12 Current sensor

CT22 Current sensor

(U)

SC-U Inverter output(U)

GND Input 17VDC

SC-V Inverter output(V)

SC-W Inverter output(W)

(W)

Faston terminals have a locking function. Make sure the cable heads are securely locked in place. Press the tab on the terminals to remove them.

HWE08040 GB

- 54 -

[ III Outdoor Unit Components ]

(2) PUHY-P120THMU-A

CNCT2 Current (AC) sensor input ACCT1 ACCT2

CNCT Current (DC) sensor input

FT-N(Note) BUS voltage output

SC-P1 Bus voltage input/output(P)

(N)

IPM-P BUS voltage output (IPM input)

CNTH Thermistor input (THHS)

CNTYP Function setting input (Z26)

(P)

IPM-N BUS voltage input/output(N) (IPM input)

CNCT3 Current (AC) sensor input (ACCT3)

LED1 Inverter in normal operation

CNIPM

IPM driving power supply output and signal output

IPM error signal input (IPM output)

CNDC1 BUS voltage output P N

LED2 Inverter error

LED4 Lit during normal CPU operation

SW1 ON: No-load operation setting OFF: Normal setting : Fixed to OFF

CN5V GND Output 5VDC

CN2 Serial communication

signal output GND Output 17VDC

CN4 GND (Fan board) Serial communication

signal input

LED3 Lit while charging

CNFG Functional earth

F02 Fuse 250VAC 3.15A

CNDC2 BUS voltage input P N

CNDC3 BUS voltage output P N

Faston terminals have a locking function. Make sure the cable heads are securely locked in place. Press the tab on the terminals to remove them.

HWE08040 GB

- 55 -

[ III Outdoor Unit Components ]

(3) PUHY-P72, P96, P120YHMU-A

Bus voltage check terminal (P) Note

IGBT (Rear)

CN1 Bus voltage output N

P Bus voltage check terminal (N) Note 1

SC-L1 Input(L1)

SC-L2 Input(L2)

SC-P1

SC-P2 Bus voltage Input(P)

Rectifier diode output (P)

CN6 Open: No-load operation setting

LED1 Lit: Inverter in normal operation Blink: Inverter error

Short-circuited: Normal setting

CN5V GND Output 5VDC

RSH1 Overcurrent detection resistor

CN4 GND

CNTYP Inverter board type

SC-V Inverter output(V)

SC-W Inverter output(W)

SC-U Inverter output(U)

(INV Board) Serial communication signal output

CN2

erial communication signal output GND Input 17VDC

SC-L3 Input(L3)

CT22 Current sensor(W)

CT3 Current sensor(L3)

CT12 Current sensor(U)

C30 C37 Smoothing capacitor

1) Before inspecting the inside of the control box, turn off the power, keep the unit off for at least 10 minutes, and confirm that the voltage between FT-P and FT-N on INV Board has dropped to DC20V or less. (It takes about 10 minutes to discharge electricity after the power supply is turned off.)

HWE08040 GB

- 56 -

[ III Outdoor Unit Components ]

4. Fan board

(1) PUHY-P72, P96, P120THMU-A

CNVDC Bus voltage input

N P

F01 Fuse 250VAC 15A

LED3 Lit during normal CPU operation

CN18V

Input 18VDC GND

CN4

GND Serial communication signal output GND（Control board） Serial communication signal output

CN22

GND（INV board） Input 5VDC

Serial communication signal input

GND（INV board） Input 17VDC

CN21

Serial communication signal output

GND（INV board） Input 17VDC

THBOX Thermistor (Control box internal temperature detection)

LED1 Inverter in normal operation

LED2 Inverter error

R630 Overcurrent detection resistor

HWE08040 GB

CNINV Inverter output

W V U

DIP IPM（Rear）

- 57 -

[ III Outdoor Unit Components ]

(2) PUHY-P72, P96, P120YHMU-A

CNVDC Bus voltage input N P

CNINV Inverter output W V U

R630,R631 Overcurrent detection resistor

DIP IPM Rear

CN18V Input 18VDC GND

LED3 Lit during normal CPU operation

CN4 GND Serial communication signal output

CN5

GND(Control board)

Serial communication signal output

CN21 Serial communication signal output GND(INV board) Input 17VDC

CN22 GND(INV board) Input 5VDC Serial communication signal input GND(INV board) Output 17VDC

THBOX Thermistor (Control box internal temperature detection)

LED1 Inverter in normal operation

LED2 Inverter error

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[ III Outdoor Unit Components ]

5. Noise Filter

(1) PUHY-P72, P96THMU-A

F2 Fuse 250VAC 6.3A

F1 Fuse 250VAC 6.3A

Grounding

TB21 Input/output（L1）

CN02 Output

L1 L2

TB22 Input/output（L2）

TB23 Input/output（L3）

CN01 Input

L3 L2 L1

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[ III Outdoor Unit Components ]

(2) PUHY-P120THMU-A

R1,2 Rush current protection resistor

F3 Fuse 250VAC 6.3A

Grounding

CN02 Output

L1 L2

F1 Fuse 250VAC 6.3A

F2 Fuse 250VAC 6.3A

TB42 Bus voltage output（N）

TB31 Bus voltage output（P）

CN03 72C drive input

Electromagnetic relay

（72C）

Diode stack rectified voltage input (Diode stack output)

Output

（Diode stack input）

TB23 Input

（L3）

TB22 Input

（L2）

TB21 Input

（L1）

CN01 Input

L3 L2 L1

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[ III Outdoor Unit Components ]

(3) PUHY-P72, P96, P120YHMU-A

CN4 Output (Rectified L2-L3 current) P N

CN2 Surge absorber circuit Surge absorber circuit Short circuit Short circuit

F1,F2,F3,F4 Fuse 250VAC 6.3A

Grounding

CN1A Input L1

CN5 Output (Rectified L2-L3 current) P N

CN6 Input L2 L3

Grounding

CN1B Input L3 L2

HWE08040 GB

TB21 Input/output(L1)

TB22 Input/output(L2)

- 61 -

TB23 Input/output(L3)

[ III Outdoor Unit Components ]

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Remote Controller

[1] Functions and Specifications of MA and ME Remote Controllers ................................... 65

[2] Group Settings and Interlock Settings via the ME Remote Controller .............................66

[3] Interlock Settings via the MA Remote Controller ............................................................. 70

[4] Using the built-in Temperature Sensor on the Remote Controller ...................................71

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[ IV Remote Controller ]

IV Remote Controller

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

There are two types of remote controllers: M-NET (ME) remote controller, which is connected on the indoor-outdoor transmission line, and MA remote controller, which is connected to each indoor unit.

1. Comparison of functions and specifications between MA and ME remote controllers

Functions/specifications MA remote controller

*1*2

M-NET (ME) remote controller

*2*3

Remote controller address settings Not required Required

Indoor/outdoor unit address settings

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

Wiring method Non-polarized 2-core cable

Required

Non-polarized 2-core cable

To perform a group operation, daisy-

chain the indoor units using non-polarized 2-core cables.

Remote controller connection Connectable to any indoor unit in the

group

Interlock with the ventilation unit Each indoor unit can individually be in-

terlocked with a ventilation unit. (Set up via remote controller in the group.)

Changes to be made upon grouping change

MA remote controller wiring between indoor units requires rewiring.

Connectable anywhere on the indoor-outdoor transmission line

Each indoor unit can individually be interlocked with a ventilation unit. (Set up via remote controller.)

Either the indoor unit address and remote controller address must both be changed, or the registration information must be changed via MELANS.

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

less remote controller.

*2. Either the MA remote controller or the M-NET remote controller can be connected when a group operation of units in a

system with multiple outdoor units is conducted or when a system controller is connected.

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

*4. Depending on the system configuration, some systems with one outdoor unit may require address settings.

2. Remote controller selection criteria

MA remote controller and M-NET remote controller have different functions and characteristics. Choose the one that better suits the requirements of a given system. Use the following criteria as a reference.

MA remote controller

*1*2

There is little likelihood of system expansion and group-

ing changes.

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

lation.

M-NET (ME) remote controller

There is a likelihood of centralized installation of remote

controllers, system expansion, and grouping changes.

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

stallation.

*1*2

To connect the remote controller directly to the OA pro-

cessing unit.

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

*2. A system controller must be connected to a system to which both MA remote controller and M-NET remote controller are

connected.

Outdoor unit

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

Outdoor unit

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

groupgroup

MA remote controller

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Indoor unit

M-NET remote controller

- 65 -

groupgroup

Indoor unit

[ IV Remote Controller ]

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

1. Group settings/interlock settings

Make the following settings to perform a group operation of units that are connected to different outdoor units or to manually set up the indoor/outdoor unit address.

(A) Group settings...........Registration of the indoor units to be controlled with the remote controller,

and search and deletion of registered information.

(B) Interlock settings........Registration of LOSSNAY units to be interlocked with the indoor units,

and search and deletion of registered information

[Operation Procedures]

(1) Address settings

Bring up either the blinking display of HO by turning on the unit or the

normal display by pressing the ON/OFF button.

The display window must look like one of the two figures below to proceed to the next step.

STAND BY DEFROST

PAR-F27MEA

CENTRALLY CONTROLLED

DAILY

AUTO OFF

CLOCK

REMAINDER

˚C

TEMP.

CLOCK→ON→OFF

TIMER SET

ON OFF

1Hr.

NOT AVAILABLE

˚C

FILTER

CHECK MODE

TEST RUN LIMIT TEMP.

ON/OFF

CHECK TEST

FILTER

[Blinking display of HO ]

Bring up the Group Setting window.

-Press and hold buttons [FILTER] and [ ] simultaneously for 2 seconds to bring up the display as

[Normal display]

shown below.

Indoor unit address display window

Select the unit address.

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

button

through the addresses.

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

display.

- 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 [ ] 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 [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.

If registration is successfully

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.

(Displayed alternately)

completed, the two displays as shown on the left will appear alternately. If the registration fails, will blink on the display. (Indicates that the selected address does not have a corresponding unit.)

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

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

To next page.

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[ 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 [ ] 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 [ ] 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 [ ] .

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 [ ], 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

[ ] 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.

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[ IV Remote Controller ]

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

1) Skip-Auto-Mode setting The automatic operation mode that is supported by some simultaneous cooling/heating type units can be made unselectable via the ME remote controller.

2) Operation mode display selection mode (Display or non-display of COOL/HEAT during automatic operation mode) When the automatic operation mode is selected, the indoor unit will automatically perform a cooling or heating operation based on the room temperature. In this case, or will appear on the remote controller display. This setting can be changed so that only will appear on the display.

3) Room temperature display selection mode (Display or non-display of room temperature) Although the suction temperature is normally displayed on the remote controller, the setting can be changed so that it will not appear on the remote controller.

4) Narrowed preset temperature range mode The default temperature ranges are 19 C to 30 C in the cooling/dry mode and 17 C to 28 C in the heating mode and 19 C to 28 C in the auto mode.

By changing these ranges (raising the lower limit for the cooling/dry mode and lowering the upper limit for the heating mode), energy can be saved.

NOTE

When making the temperature range setting on the simultaneous cooling/heating type units that supports the automatic operation mode to save on energy consumption, enable the Skip-Auto-Mode setting to make the automatic operation mode unselectable. If the automatic operation mode is selected, the energy-saving function may not work properly.

When connected to the air conditioning units that do not support the automatic operation mode, the setting for the Skip-Auto-Mode, restricted preset temperature range mode (AUTO), and operation mode display selection mode are invalid. If an attempt is made to change the preset temperature range, “LIMIT TEMP.” appears on the display.

PAR-F27MEA

TEMP.

TIMER SET

CLOCKĺONĺOFF

ON/OFF

FILTER

CHECK TEST

Normal display

1 1

Remote controller function selection mode

Skip-Auto-Mode setting

Temperature range setting mode (AUTO)

Operation mode display selection mode (Display or non-display of the automatic mode)

Restricted preset temperature range mode (Cooling)

Restricted preset temperature range mode (Heating)

Room temperature display selection mode

[Function selection mode sequence on the remote controller]

*1 *1

[Normal display]

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

: [SET TEMP.

*1 : Skip-Auto-Mode is enabled *2 : Skip-Auto-Mode is disabled

( ) ] ( ) ]

button button

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[ IV Remote Controller ]

[Operation Procedures]

1. Press the [ON/OFF] button on the remote controller to bring the unit to a stop. The display will appear as shown in the previous page (Normal display).

2. Press buttons [CHECK] and [ ] simultaneously for 2 seconds to go into the “Skip-Auto-Mode setting.” under the remote controller function selection mode. Press button [SET TEMP. ( )] or [SET TEMP. ( )] to go into the other four modes

under the remote controller function selection mode.

Skip-Auto-Mode setting (Making the automatic operation mode unselectable)

This setting is valid only when the controller is connected to the simultaneous cooling/heating type air conditioning units that support the automatic operation mode.

“ ” blinks and either “ON” or “OFF” lights up on the controller. Pressing the [TIMER SET ( ) or ( )] button switches

between “ON” and “OFF.”

[TIMER SET ( ) (( ))] button

When set to “ON,” the automatic operation mode is available for selection in the function selection mode. When set to “OFF,” the automatic operation mode is not available for selection in the function selection mode, and an automatic operation cannot be performed. (The automatic operation mode is skipped in the function selection mode sequence.)

Operation mode display selection mode (Changing the type of display that appears during the automatic mode operation)

When connected to the air conditioning units that do not support the automatic operation mode, the setting for this mode is invalid.

will blink, and either

switch between “ON” and “OFF.”

“ON”or“

OFF” will light up.

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

[TIMER SET ( ) (( ))] button

When it is set to ON, will appear on the display during automatic operation mode. When it is set to OFF, only will appear on the display during automatic operation mode.

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

1) Temperature range setting for the cooling/dry mode

will light up in the display window, and the temperature range for the cooling/dry mode will appear on the display. [Lower limit temperature]: Appears in the preset temperature display window [Upper limit temperature: Appears in the time display window Switch between the Lower and Upper limit temperature setting by pressing the [CLOCK-ON-OFF] button. The selected temperature setting blinks.

[TIMER SET ( ) (( ))] button

[The left figure shows the display that appears when the current temperature range setting is between 19 C and 30 C in the Cool/Dry mode, and the lower limit temperature is selected to be set.]

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

[Settable range for the lower limit temperature] : 19 C 30 C (Settable up to the upper limit temperature that is shown on the display) [Settable range for the upper limit temperature] : 30 C 19 C (Settable up to the lower limit temperature that is shown on the display)

2) Temperature range setting for heating

“ ” and the settable temperature range for heating appear on the display. As with the Cool/Dry mode, use the [CLOCK-ON-OFF] button and the [TIMER SET ( ) or ( )] to set the temperature range.

[Settable range for the lower limit temperature] : 17 C 28 C (Settable up to the upper limit temperature that is shown on the display) [Settable range for the upper limit temperature] : 28 C 17 C (Settable up to the lower limit temperature that is shown on the display)

3) Temperature range setting for the automatic mode

When connected to the air conditioning units that do not support the automatic operation mode, the setting for this mode is invalid.

“ ” and the temperature range for the automatic operation mode appear on the display. As with the Cool/Dry mode, use the [CLOCK-ON-OFF] button and the [TIMER SET ( ) or ( )] to set the temperature range.

[Settable range for the lower limit temperature] : 19 C 28 C (Settable up to the upper limit temperature that is shown on the display) [Settable range for the upper limit temperature] : 28 C 19 C (Settable up to the lower limit temperature that is shown on the display)

Room temperature display selection mode (Switching between the display or non-display of room temperature on the controller)

“ 88 C ” blinks and either “ON” or “OFF” lights up on the controller. Pressing the [TIMER SET ( ) or ( )] button

switches between “ON” and “OFF.”

˚C ˚C

[TIMER SET ( ) (( ))] button

When set to “ON,” room temperature always appears on the display during operation. When set to “OFF,” room temperature does not appear on the display during operation.

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[ IV Remote Controller ]

[3] Interlock Settings via the MA Remote Controller

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

Make this setting only when necessary.

Perform this operation to enter the interlock setting between the LOSSNAY and the indoor units to which the remote controller is connected, or to search and delete registered information.

In the following example, the address of the indoor unit is 05 and the address of the LOSSNAY unit is 30.

[Operation Procedures]

Press the [ON/OFF] button on the remote controller to bring the unit to a stop.

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.

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[ 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

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

1. Selecting the position of temperature detection (Factory setting: SW1-1 on the controller board on the indoor unit is set to OFF.)

To use the built-in sensor on the remote controller, set the SW1-1 on the controller board on the indoor unit to ON.

Some models of remote controllers are not equipped with a built-in temperature sensor. Use the built-in temperature sensor

on the indoor unit instead.

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

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- 72 -

Electrical Wiring Diagram

[1] Electrical Wiring Diagram of the Outdoor Unit .................................................................75

[2] Electrical Wiring Diagram of Transmission Booster......................................................... 78

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[ V Electrical Wiring Diagram ]

VElectrical Wiring Diagram

[1] Electrical Wiring Diagram of the Outdoor Unit

1. Electrical wiring diagram of the outdoor unit

(1) PUHY-P72, P96THMU-A

LEV1

LEV2a

LEV2b

Z24

Z25

654

2123456

CNLVA

CNDC

122131

pink

CN4

CN332

CNT02

CN801

CNT01

blue

yellow

CN2

Power

CPU power

supply circuit

CNAC2

black

CNLVB

63H1

red

failure

detection

132

circuit

CN505

X72

black

234

CNLVC

red

ONOFF

OFF

LED1

ON OFF ON OFF ON OFF ON

SWU1

1's digit

Control Board

SWU2

10's digit

X03

X02

X01

CN503

blue

CN502

CN501

Unit address setting

X04

CN504

green

CNTYP5

green

LED1

Display

setting

SW4 SW3 SW2 SW1

SW5

Function setting

Compressor ON/OFF output

Error detection output

543

CN51

12V

X05

CN506

CNTYP4

TH6

t°

CN213

green

TH5

TH7

TH3

t°

21223

CN212

red

CN990

LED3:Lit when powered

X09

CN508

black

163

63LS

63HS1

CN202

red

CN201

LED2:CPU in operation

CN40

321

4321

F01

TH2

TH4

t°

CN215

black

CN211

4521

2323123

red

CNIT

yellow

CNS2

OFF

432112 431

CN41CN102CN3D

Power selecting

connector

3123

red

CN3S

blue

CN3N

yellow

CN3K

AC250V

3.15A T

red

CNAC

red

CNIT

TB7

yellow

CNS2

Indoor/Outdoor

transmission line

TB3

LED1:Power supply to

CN102

M-NET power

supply

circuit

F01

AC250V

3.15A T

M1 M2 M1 M2 S

TP2

TP1

M-NET Board

Central control

transmission

Indoor/Outdoor

transmission

cable

123

4512

1234

CN04

red

1313

CN03

black

123

blue

CN21

CN22

CN4

12 45

CN18V

blue

F01

AC250V

15A T

FAN Board

CNVDC

red

12345

red

THBOX

operation

LED3:CPU in

IPM

R630

C630

CNINV

Fan motor

(Heat exchanger)

white

72C

21S4b

t°

operation

LED1:Normal

LED2:Error

SV1a

black

CH11

black

13142343

red

CN4

CN5V

2 1

CN6

SC-P1

INV Board

3334

DCL

SV5b

21S4a

CNDC

pink

yellow

RSH2

C32

+++

C31

RSH1

t°

C30

/Error(Blink)

R30

LED1:Normal operation(Lit)

ZNR1

IGBT

TB-N

TB-P

SC-P2

red

72C

THHS

black

CN2

SC-V

SV9

CT22

SC-W

CT12

SC-U

SC-R

SC-S

CT3

SC-T

CN02

CX6

CY3

CY2

CY1

DSA1

Noise Filter

black

white

red

white

black

white

black

red

CX5

TB23

CX4

TB22

TB21

AC250V

6.3A T

CX2

CX3

CX1

CN01

AC250V

6.3A T

black

white

red

Motor

(Compressor)

Ground

L3L2

black

whitered

L3L2

Power supply

60Hz

not supplied with the unit.

box boundaries.

input/output signal connectors.

outdoor units in the same refrigerant

*1.Single-dotted lines indicate wiring

*2.Dot-dash lines indicate the control

*3.Refer to the Data book for connecting

Explanation

Central control transmission

cable

Indoor/Outdoor transmission

cable

Power supply

Terminal

block

Symbol

TB1

TB3

TB7

system together.

*4.Daisy-chain terminals (TB3) on the

*5.Faston terminals have a locking

Subcool bypass outlet

temperature

OA temperature

ACC inlet pipe temperature

Discharge pipe temperature

Pipe temperature

Subcooled liquid refrigerant

temperature

Thermistor

TH2

TH3

TH4

TH5

TH6

TH7

208/230V

function.Make sure the terminals

are securely locked in place after

insertion.Press the tab on the

terminals to removed them.

IGBT temperature

Control box internal temperature

Function setting connector

THHS

Z24,25

THBOX

TB1

Explanation

High pressure protection for the

outdoor unit

Cooling/Heating switching

Heat exchanger capacity control

Discharge pressure

Low pressure

HIC bypass,Controls refrigerant

Outdoor unit heat exchanger

capacity control

Pressure control,Refrigerant flow

rate control

For opening/closing the bypass

circuit under the O/S

flow in HIC circuit

For opening/closing the bypass

circuit

4-way valve

Pressure

sensor

Pressure

switch

Magnetic relay(inverter main circuit)

Current sensor(AC)

Crankcase heater(for heating the compressor)

Symbol

63H1

63HS1

63LS

72C

CH11

21S4b

21S4a

HWE08040 GB

- 75 -

CT12,22,3

Linear

expansion

DC reactor

LEV1

DCL

valve

LEV2a,b

Solenoid

valve

SV5b

SV1a

SV9

[ V Electrical Wiring Diagram ]

(2) PUHY-P120THMU-A

LEV2a

CNLVB

red

Control Board

Power

failure

detection

circuit

X72

CN505

black

LEV2b

12345

CNLVC

red

LED1

X01

CN501

LEV1

122

536

CNDC

211131

2 1

pink

CNLVA

CN4

CN332

CNT02

CN801

CNT01

blue

yellow

CN2

752

CPU power

supply circuit

CNAC2

63H1

OFF

OFF ON

ON OFF

OFF

SWU1

SWU2

X02

CN502

LED1

Display

SW1

SW2

SW3

SW4

SW5

Function setting

1's digit

CN51

10's digit

12V

Unit address setting

X04

X03

CN506

CN503

blue

CN504

green

116

TH6

TH7

TH3

t°

Z25

Z24

1223412

CN212

CN213

red

green

CNTYP5

CNTYP4

setting

Error detection output

Compressor ON/OFF output

X05

X07

X08

CN507

red

CN508

black

635

TH5

63HS1

63LS

32132

t°

121

red

CN201

CN202

CN990

4 3

CN40

LED2:CPU in operation

LED3:Lit when powered

F01

X09

163

TH4

TH2

t°

2t°112

CN211

CN215

black

51232132 4

red

CNIT

yellow

CNS2

OFF

CN41

Power selecting

connector

3 2

CN102

21 1

CN3D

13 2

red

CN3S

blue

CN3N

yellow

CN3K

AC250V

3.15A T

CNAC

red

CNIT

yellow

CNS2

Power supply to

LED1

CN102

M-NET power

red

black

F01

TB7

Indoor/Outdoor

transmission line

M2 M1 M2

TB3

supply

circuit

AC250V

3.15A T

TP2

TP1

M-NET Board

Central control

transmission

Indoor/Outdoor

transmission

cable

12 3

1 2 3 4

CN04

CN03

432

654

blue

CN21

5 4

CN22

CN4

CN18V

blue

F01

AC250V

15A T

FAN Board

CNVDC

red

THBOX

operation

LED3:CPU in

IPM

R630

C630

CNINV

Fan motor

(Heat exchanger)

t°

operation

LED1:Normal

LED2:Error

124

21S4b

SV1a

THHS

CH11

Z26

t°

SV5b

21S4a

521

CN2

yellow

CN5V

SW1

OFF

Function

setting

LED2:Error

LED1:Normal operation

operation

LED4:CPU in

CNCT3

black

1 2

CNTYP

1 2

CNTH

green

CNCT

3121

CNCT2

blue

432

72C

R2R1

DCL

TB31

red

CN03

black

Noise

Filter

SV5c

SV9

21S4c

CN4

LED3:Charge

INV Board

R01

black

72C

TB42

AC250V

3 1

CN02

black

C41

6.3A T

FT-N

IPM power

supply

circuit

CNIPM

red

Diode Stack

CY1

CNFG

blue

CNDC1

DCCT1

~~~

CX6

CX5

CY2

DSA1

F02

CX4

CY3

AC250V

3.15A T

C008

C007

SC-P1

pink

CNDC3

11 3

CNDC2

ACCT1

red

white

ACCT2

black

IPM

black

ACCT3

TB23

TB22

TB21

AC250V

6.3A T

CX2

CX3

CX1

CN01

AC250V

6.3A T

red

white

Motor

black

(Compressor)

Ground

blackwhitered

Power supply

TB1

not supplied with the unit.

box boundaries.

input/output signal connectors.

outdoor units in the same refrigerant

*1.Single-dotted lines indicate wiring

*2.Dot-dash lines indicate the control

*3.Refer to the Data book for connecting

Explanation

Central control transmission

cable

Indoor/Outdoor transmission

cable

Subcool bypass outlet

Power supply

Thermistor

Terminal

block

60Hz

208/230V

Symbol

Explanation

TH2

TB1

TB3

TB7

High pressure protection for the

outdoor unit

Discharge pressure

Low pressure

Cooling/Heating switching

Heat exchanger capacity control

system together.

*4.Daisy-chain terminals (TB3) on the

temperature

ACC inlet pipe temperature

Discharge pipe temperature

Pipe temperature

Subcooled liquid refrigerant

temperature

TH3

TH4

TH5

TH6

HIC bypass,Controls refrigerant

function.Make sure the terminals

are securely locked in place after

insertion.Press the tab on the

*5.Faston terminals have a locking

OA temperature

terminals to removed them.

IGBT temperature

Control box internal temperature

Function setting connector

TH7

THHS3Z24,25,26

THBOX

flow in HIC circuit

Pressure control,Refrigerant flow

rate control

For opening/closing the bypass

circuit under the O/S

For opening/closing the bypass

circuit

Outdoor unit heat exchanger

capacity control

Solenoid

4-way valve

Pressure

sensor

Pressure

switch

Magnetic relay(inverter main circuit)

Current sensor(AC)

Crankcase heater(for heating the compressor)

DC reactor

Symbol

21S4b,c

21S4a

63H1

HWE08040 GB

- 76 -

63HS1

63LS

72C

ACCT1,2,3

CH11

DCCT1 Current sensor(DC)

DCL

Linear

expansion

valve

LEV1

LEV2a,b

valve

SV1a

SV5b,c

SV9

[ V Electrical Wiring Diagram ]

(3) PUHY-P72, P96,P120YHMU-A

LEV1

12345

54321

CN2

supply circuit

ZNR01

CN72

CNLVB

red

LEV2a

65432

Power failure

detection circuit

CNAC2

black

CNLVC

CNLVA

63H1

CN4

CN332

blue

CNT02

CN801

yellow

2 1

CNT01

CPU power

pink

CNDC

3 21122

LEV2b

red

ONOFF

OFF

ONOFF

LED1

OFF

1's

digit

SWU1

10's

digit

SWU2

Control Board

X01

X02

X03

CN501

CN502

CN503

blue

SW1

SW2

SW3

SW4

SW5

Unit address

setting

X04

CN504

green

CN506

Z24

Z25

green

CNTYP2

black

CNTYP4

CNTYP5

green

LED1

Display

setting

Function

setting

Compressor ON/OFF output

Error detection output

CN51

12V

X05

X07

CN507

red

356

TH5

TH3

TH7

TH6

t°

CN212

CN990

CN213

red

LED3:Lit when powered

X08

X09

CN508

black

63LS

CN202

red

LED2:CPU in operation

TH2

63HS1

t°

CN201

CN215

black

TB7 Power

selecting

connector

CN40

F01

4 3

AC250V

TH4

t°

CN211

5 44 3

red

CNIT

yellow

CNS2

3 21

CN41

432

CN102

CN3D

11 2

red

CN3S

blue

CN3N

123

yellow

CN3K

3.15A T

CNAC

OFF

red

TP2

TP1

CNIT

red

TB7

Indoor/Outdoor

1 2

1 2 3 4

CN04

red

transmission line

LED1:Power supply to

CNS2

yellow

CN102

M-NET power

supply circuit

TB3

M-NET Board

Central control

transmission

Indoor/Outdoor

transmission

cable

CN21

blue

CN5

red

CN4

LED3:CPU in

operation

CN18V

blue

C631

F01

DC700V

4A T

FAN Board

72C

CN22

red

IPM

R631

R630

C630

CNVDC

Fan motor

(Heat exchanger)

THBOX

t°

21S4b

operation

LED2:Error

LED1:Normal

C100

CNINV

CH11

21S4a

SV5b

SV1a

CN4

yellow

CN5V

1 2

CN6

/ Error(Blink)

Normal operation(Lit)

LED1

black

SC-P1

72C

FT-P

red

DCL

SC-P2

red

CN1

red

CN5

CN4

blue

CN2

SV9

SV5c

21S4c

black

CNTYP

CN2

SC-V

RSH1

THHS

t°

ZNR1

IGBT

C35

C37

R31

C31

C33

FT-N

++++++

R30

C34

C32

C36

C30

AC250V

6.3A T

Diode

Bridge

CN6

C17

Noise

Filter

C10

DSA

F1,F2,F3

AC250V

6.3A T U

CT22

SC-W

SC-U

SC-L2

SC-L1

R33

red

R32

R34 R35

red

yellow

black

white

red

CT12

SC-L3

CT3

black

white

INV Board

white

black

red

white

black

TB23

TB22

L2L1

TB21

CN1B

black

CN1A

black

white

Motor

red

(Compressor)

45678

600V

3A F

600V

3A F

white

L1L2 L2

CNTR1

Ground

L1 L2 L3

TB1

red

Power Source3~60Hz

432

CNTR2

CN06

460V

Transformer Box

T02

234

purple

460V

CNTR3

(Transformer)

T03

(Transformer)

56243

CN07

purple

460V

Explanation

High pressure protection for the

outdoor unit

Heat exchanger capacity control

Low pressure

Discharge pressure

Appliance

*7 do not exist

*7 exist

Model name

P120

in place after insertion. Press the tab

same refrigerant system together.

*1.Single-dotted lines indicate wiring not supplied with the unit.

*2.Dot-dash lines indicate the control box boundaries.

Make sure the terminals are securely locked

*3.Refer to the Data book for connecting input/output signal connectors.

*4.Daisy-chain terminals (TB3) on the outdoor units in the

*5.Faston terminals have a locking function.

the unit off for at least 10 minutes,

on the terminals to removed them.

Before inspecting the inside of the

control box,turn off the power,keep

and confirm that the voltage between

*6.Control box houses high-voltage parts.

FT-P and FT-N on INV Board has dropped

P72/P96

to DC20V or less.

*7.Difference of appliance

HWE08040 GB

Cooling/Heating switching

4-way valve

Pressure

switch

Pressure

Symbol

21S4a

21S4b,c

63HS1

63H1

- 77 -

HIC bypass,Controls refrigerant

DC reactor

Linear

Crankcase heater(for heating the compressor)

Current sensor(AC)

Magnetic relay(inverter main circuit)

sensor

DCL

LEV1

CT12,22,3

CH11

72C

63LS

Outdoor unit heat exchanger

flow in HIC circuit

expansion

capacity control

For opening/closing the bypass

circuit under the O/S

Pressure control,Refrigerant flow

rate control

valve

Solenoid

valve

LEV2a,b

SV1a

SV5b,c

Central control transmission

cable

Indoor/Outdoor transmission

cable

Subcool bypass outlet

temperature

TB7

Pipe temperature

Thermistor

TH3

TH2

Discharge pipe temperature

TH4

Power supply

For opening/closing the bypass

circuit

Terminal

block

SV9

TB1

TB3

Subcooled liquid refrigerant

temperature

IGBT temperature

OA temperature

ACC inlet pipe temperature

Control box internal temperature

Function setting connector

TH5

TH6

TH7

THHS

Z24,25

THBOX

[ V Electrical Wiring Diagram ]

[2] Electrical Wiring Diagram of Transmission Booster

Terminal block for power supply (TB1)

100V/200VAC

Grounding

250V 5A

Red

White

Green

Red Red

Red

Varistor

DSA

White Blue RedRed

1 2

1 2 1 2

CN3

Electronic control board

Red

White

Red

Varistor

White White

White

Red

Blue

White

Choke coil

CN2

CN4

CN1

White

Red

Black

Red

White

Stabilized power supply

CN2

Noise filter

Green/Yellow

Black

CN1

White

Red

Black

Red

Black

Terminal block 2 for

transmission line (TB3) Expanded (indoor unit) side

Terminal block 1 for

transmission line (TB2) Expanded (outdoor unit) side

HWE08040 GB

- 78 -

Refrigerant Circuit

[1] Refrigerant Circuit Diagram ............................................................................................. 81

[2] Principal Parts and Functions ..........................................................................................82

HWE08040 GB

- 79 -

- 80 -

[ VI Refrigerant Circuit ]

VI Refrigerant Circuit

[1] Refrigerant Circuit Diagram

1. Outdoor unit (1) PUHY-P72, P96 models

TH7

SV5b

(2) PUHY-P120 models

HEX

TH3

21S4b

ST2

ST1

BV1

BV2

SV1a

CP1

LEV2a

LEV2b

TH5

63LS

ACC

ST6

ST7

21S4a

CJ1

O/S

Comp

ST3

TH6

63H1 63HS1

TH4

CJ2

CP2SV9

TH2

SCC

LEV1

SV5c

TH7

SV5b

HEX

21S4c

SV9

TH3

21S4b

CP2

TH2

SCC

21S4a

TH4

CJ2

LEV1

O/S

Comp

TH6

63H1 63HS1 CJ1

ST3

SV1a

CP1

ST7

LEV2a

LEV2b

ACC

ST6

63LS

TH5

ST2

ST1

BV1

BV2

HWE08040 GB

- 81 -

[ VI Refrigerant Circuit ]

[2] Principal Parts and Functions

1. Outdoor unit

Part

name

Compressor

High pressure sensor

Low pressure sensor

Symbols

(functions)

MC1 (Comp1)

Notes Usage Specifications Check method

Adjusts the amount of circulating refrigerant by adjusting the operating frequency based on the operating pressure data

63HS1 1) Detects high pressure

2) Regulates frequency and provides high-pressure protection

63LS 1) Detects low pressure

2) Provides low-pressure protection

P72 and 96 models Low-pressure shell scroll compressor Wirewound resistance 20°C[68°F] :

0.268ohm(THMU)

0.981ohm(YHMU) P120 model

Low-pressure shell scroll compressor Wirewound resistance 20°C[68°F] :

0.161ohm(THMU)

0.583ohm(YHMU)

Pressure 0~4.15 MPa [601psi]

63HS1

Vout 0.5~3.5V

123

0.071V/0.098 MPa [14psi]

Connector

Pressure [MPa] =1.38 x Vout [V]-0.69 Pressure [psi] =(1.38 x Vout [V] - 0.69) x 145

GND (Black)

Vout (White)

Vcc (DC5V) (Red)

Pressure

63LS

0~1.7 MPa [247psi] Vout 0.5~3.5V

123

0.173V/0.098 MPa [14psi] Pressure [MPa] =0.566 x Vout [V] - 0.283 Pressure [psi] =(0.566 x Vout [V] - 0.283) x 145

GND (Black)

Vout (White)

Vcc (DC5V) (Red)

Pressure switch

63H1 1) Detects high pressure

2) Provides high-pressure protection

4.15MPa[601psi] OFF setting

HWE08040 GB

- 82 -

[ VI Refrigerant Circuit ]

Part

name

Thermistor

Solenoid valve

Symbols

(functions)

TH4 (Discharge)

Notes Usage Specifications Check method

1) Detects discharge air temperature

2) Provides high-pressure protection

0°C[32°F] :698kohm

Degrees Celsius Resistance

R = 7.465k

120

R = 4057

25/120

R =

7.465

exp

4057

273 t

393

10°C[50°F] :413kohm 20°C[68°F] :250kohm 30°C[86°F] :160kohm 40°C[104°F] :104kohm 50°C[122°F] : 70kohm 60°C[140°F] : 48kohm 70°C[158°F] : 34kohm 80°C[176°F] : 24kohm 90°C[194°F] :17.5kohm 100°C[212°F] :13.0kohm 110°C[230°F] : 9.8kohm

TH2 LEV 1 is controlled based on the

TH2, TH3, and TH6 values.

TH3 (Pipe temperature)

1) Controls frequency

2) Controls defrosting during heating operation

3) Detects subcool at the heat exchanger outlet and controls LEV1 based on HPS data and TH3 data

TH7 (Outdoor temperature)

1) Detects outdoor air temperature

2) Controls fan operation

Degrees Celsius

R = 15k

R = 3460

0/80

R = 15

exp

3460

273 t

0°C[32°F] :15kohm 10°C[50°F] :9.7kohm 20°C[68°F] :6.4kohm 25°C[77°F] :5.3kohm 30°C[86°F] :4.3kohm 40°C[104°F] :3.1kohm

273

TH5 LEV2a and LEV2b are controlled

based on the 63LS and TH5 values.

TH6 Controls LEV1 based on TH2,

TH3, and TH6 data.

THHS Inverter heat sink temperature

Controls inverter cooling fan based on THHS temperature

Degrees Celsius

R = 17k

R = 4016

25/120

exp

R = 17

4016

273 t

323

THBOX Control box internal temperature detection

0°C[32°F] :161kohm 10°C[50°F] :97kohm 20°C[68°F] :60kohm 25°C[77°F] :48kohm 30°C[86°F] :39kohm 40°C[104°F] :25kohm

SV1a Discharge-suction bypass

1) High/low pressure bypass at

start-up and stopping, and capacity control during lowload operation

AC208-230V Open while being powered/ closed while not being powered

2) High-pressure-rise preven-

tion

SV5b Heat

Controls outdoor unit heat ex-

changer capacity exchanger capacity control

SV5c P120

model only

SV9 High-pressure-rise prevention Open while being powered/

closed while not being powered

check

Resistance check

Continuity check with a tester

HWE08040 GB

- 83 -

[ VI Refrigerant Circuit ]

Part

name

Linear expansion

Symbols

(functions)

LEV1 (SC control)

Notes Usage Specifications Check method

Adjusts the amount of bypass flow

from the liquid pipe on the outdoor

unit during cooling

valve

LEV2a LEV2b

Adjusts refrigerant flow during

heating (Refrigerant flow adjustment)

Heater CH11 Heats the refrigerant in the com-

pressor

4-way valve

21S4a Changeover between heating and

cooling

21S4b 1) Changeover between heating

21S4c P120

model only

and cooling

2) Controls outdoor unit heat exchanger capacity

DC12V Opening of a valve driven by a stepping motor 0-480 pulses (direct driven type)

DC12V Opening of a valve driven by a stepping motor 1400 pulses

Cord heater AC230V P72 and P96 models 1037 ohm 51W P120 model 928 ohm 57W

AC208-230V Dead: cooling cycle Live: heating cycle

AC208-230V Dead: cooling cycle Outdoor unit heat exchanger capacity at 100% Live: heating cycle Outdoor unit heat exchanger capacity at 50% or heating cycle

Same as indoor LEV The resistance value differs from that of the indoor LEV. (Refer to the section "LEV Troubleshooti ng."(page 238 ))

Same as indoor LEV

Resistance check

Continuity check with a tester

HWE08040 GB

- 84 -

[ VI Refrigerant Circuit ]

2. Indoor Unit

Part

Name

Linear expansion valve

Thermistor

Symbol

(functions)

Notes Usage Specification Check method

LEV 1) Adjusts superheat at the

indoor heat exchanger outlet during cooling

2) Adjusts subcool at the heat exchanger outlet of the indoor unit during cooling

TH1

Indoor unit control (Thermo) (Suction air temperature)

TH2 (Pipe temperature)

1) Indoor unit control (Frost prevention, Hot adjust)

2) LEV control during heating operation (subcool detection).

TH3 (Gas pipe

LEV control during cooling operation (superheat detection)

temperature)

TH4

Indoor unit control (Thermo) Outdoor air temperature)

Temperature

Indoor unit control (Thermo) sensor (Indoor air temperature)

DC12V Opening of stepping motor driving valve 0-(1400) pulses

R0=15k R

0/80

=3460 Rt = 15exp{3460( - )}

273+t

273

0°C [32°F]:15kohm 10°C [50°F] :9.7kohm 20°C [68°F]:6.4kohm 25°C [77°F] :5.3kohm 30°C [86°F] :4.3kohm 40°C [104°F] :3.1kohm

Refer to the section "Continuity Test with a Tester". Continuity between white, red, and orange. Continuity between yellow, brown, and blue.

White

Red

Orange

Yellow

Brown Blue

Resistance check

HWE08040 GB

- 85 -

- 86 -

VII

Control

[1] Functions and Factory Settings of the Dipswitches ......................................................... 89

[2] Controlling the Outdoor Unit ............................................................................................ 96

[3] Operation Flow Chart..................................................................................................... 108

HWE08040 GB

- 87 -

- 88 -

[ VII Control ]

VII Control

[1] Functions and Factory Settings of the Dipswitches

1. Outdoor unit (1) Control board

Switch Function

Function according to switch setting Switch setting timing

OFF ON OFF ON OC OS

SWU 1-2 Unit address setting Set to 00 or 51-100 with the dial switch Before power on C C

SW1 1-10

For self-diagnosis/ operation monitoring

Centralized control switch

Deletion of connection information

Deletion of error history SW

Refer to the LED monitor display on the outdoor unit board.

Without connection to the centralized controller

With connection to the centralized controller

Anytime after power on

Before power on

Normal control Deletion Before power on

(OC) Storage of IC/ OC error history

(OS) Storage of OS error history

(OC) Deletion of IC/ OC error history

(OS) Deletion of OS error history

Anytime after power on (When switched from OFF to ON)

After being energized and

4 Pump down mode Normal control Pump down mode

while the compressor is stopped

5- - - - -6- - - - --

SW2

Forced defrost

Note 3

Normal control

Forced defrost starts

10 minutes after compressor startup

Anytime after power on (When switched from OFF to ON)

Defrost timer setting

Note 3

Target evaporation

temperature setting

50 minutes 90 minutes

Depends on the setting combination with the SW3-5 setting (Note 4)

Anytime after power on (When switched from OFF to ON)

Anytime after power on

Enable/disable refrigerant noise suppression function

during defrosting (Fan operation

Normal control

Refrigerant noise suppression

Befo

re powe

r on

against leaky indoor unit LEV)

Units that re-

quire switch

setting Note.2

A-

1) Unless otherwise specified, leave the switch to OFF where indicated by "-," which may be set to OFF for a reason.

2) A: Only the switch on either the OC or OS needs to be set for the setting to be effective on both units. B: The switches on both the OC and OS need to be set to the same setting for the setting to be effective. C: The setting is effective for the unit on which the setting is made.

3) Refer to "VII [2] Controlling the Outdoor Unit" for details.(page 96)

4) The table below shows the combination of SW2-9 and SW3-5 settings and the target evaporation temperature setting that corresponds to each combination.

Switch

OFF ON

SW2-9

SW3-5 OFF 0°C [32°F] -4°C [25°F]

ON -2°C [28°F] -6°C [21°F]

HWE08040 GB

- 89 -

[ VII Control ]

Switch Function

SW3

SW4

Units that

require

Function according to switch setting Switch setting timing

switch set-

ting

Note.2

OFF ON OFF ON OC OS

Test run mode: en-

abled/disabled Test run mode: ON/

OFF Defrost start tem-

perature Note 5

Defrost end tem-

perature Note 5

SW3-2 disabled SW3-2 enabled Anytime after power on

Stops all ICs

Sends a test-run signal to all IC

After power on and when SW3-1 is on.

-10°C [14°F] -5°C [23°F] Anytime after power on

P72, P96 10°C [50°F]

P120

5°C [41°F]

Anytime after power on (except during defrost)

A-

7°C [45°F]

Target evaporation

temperature setting Temperature unit

setting Target condensing

temperature setting

Depends on the setting combination with the SW2-9 setting (Note 4)

Anytime after power on

°C °F Anytime after power on

49°C [120°F] 53°C [127°F] -

A-

for heating

8- - - - --

9 Model setting

10 Model setting

Enable/disable high

sensible temperature operation

Outdoor standard static pressure

High static pressure 60Pa

Normal operation mode

Outdoor high static pressure

High static pressure 30Pa

High sensible temperature operation mode

Before being energized

A-

2- - - - --

Refrigerant amount

adjustment

Low-noise mode/

step demand switching

Automatic cooling/heating switchover (IC with

the minimum address)

Cumulative com-

pressor operation time data deletion

Normal operation mode

Low-noise mode Note 3

Normal operation mode

Cumulative compressor operation time data is retained.

Refrigerant amount adjust mode

Anytime after being energized (except during initial startup mode. Automatically cancelled 60 minutes after compressor startup)

Step demand mode Before being energized

Automatic cooling/ heating switchover

Cumulative compressor operation time data is deleted.

Before being energized

Anytime after power on (when the unit is turned on)

A-

7- - - - -8- - - - -9- - - - --

10 - - - - - -

1) Unless otherwise specified, leave the switch to OFF where indicated by "-," which may be set to OFF for a reason.

3) The noise level is reduced by controlling the compressor frequency and outdoor fan rotation speed. Setting of CN3D is required.

4) The table below shows the combination of SW2-9 and SW3-5 settings and the target evaporation temperature setting that corresponds to each combination.

Switch

OFF ON

SW2-9

SW3-5 OFF 0°C [32°F] -4°C [25°F]

ON -2°C [28°F] -6°C [21°F]

5) Refer to VII [2] Controlling the Outdoor Unit -7- Defrost Operation Control for details.(page 99)

HWE08040 GB

- 90 -

[ VII Control ]

Units that re-

quire switch

setting Note.2

Switch Function

Function according to switch setting Switch setting timing

OFF ON OFF ON OC OS

1 2----

Model setting

3----

----CC

4----

SW5

Low-noise mode

selection

Capacity priority mode Note 3

Low-noise mode Before being energized

A-

6- - - - -7 Model setting - - - B B

8- - - - -9- - - - --

10 Heating backup Ineffective Effective Any time after power on A -

1) Unless otherwise specified, leave the switch to OFF where indicated by "-," which may be set to OFF for a reason.

3) When set to the capacity priority mode and if the following conditions are met, the Low-noise mode will terminate, and the unit will go back into the normal operation mode. Cooling: Outside temperature is high or high pressure is high. Heating: Outside temperature is low or low pressure is low.

(2) INV board

1) PUHY-P72, P96, P120YHMU-A, PUHY-P72, P96THMU-A

Functions are switched with the following connector.

Connector Function

Function according to connec-

tor

Setting timing

Enabled Disabled Enabled Disabled

CN6 shortcircuit con-

nector

Enabling/disabling the following error detection functions; ACCT sensor failure (5301 Detail No. 115) ACCT sensor circuit failure

Error detection enabled

Error detection disable (No load operation is possible.)

Anytime after power on

(5301 Detail No.117) IPM open/ACCT erroneous wiring (5301 Detail No. 119) Detection of ACCT erroneous wiring (5301 Detail No.120)

CN6 short-circuit connector is mated with the mating connector. Leave the short-circuit connector on the mating connector during normal operation to enable error detection and protect the

equipment from damage.

HWE08040 GB

- 91 -

Mitsubishi Electronics PUHY-P144, PUHY-P168, PUHY-P216, PUHY-P36, PUHY-P240YTSHMU-A User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual