Mitsubishi PUHY-P700YSGM-A, PUHY-P750YSGM-A, PUHY-P800YSGM-A Service Manual

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Models PUHY-P700, P750, P800YSGM-A

Service Handbook

AIR CONDITIONERS CITY MULTI

Page 2

Contents

1 Read Before Servicing ................................................................ 6

[1] Items to Be Checked .............................................................. 6

[2] Necessary Tools and Materials .............................................. 7

[3] Piping Materials ...................................................................... 8

[4] Storage of Piping Material ...................................................... 10

[5] Piping Machining .................................................................... 11

[6] Brazing.................................................................................... 12

[7]

Airtightness Test

...................................................................... 13

[8] Vacuuming .............................................................................. 13

[9] Vacuum Drying........................................................................ 14

[10] Changing Refrigerant.............................................................. 15

[11] Remedies to be taken in case of a refrigerant leak................ 15

[12]

Characteristics of the Conventional and the New Refrigerants

.. 16

[13] Notes on Refrigerating Machine Oil........................................ 17

2 Restrictions .................................................................................. 18

[1] Electrical Work & M-NET control ............................................ 18

[2] Types of Switch Setting and Address Setting ........................ 19

[3] Examples of system connection ............................................ 21

[4] Restrictions on Refrigerant Piping Length.............................. 35

3 Components of the Outdoor Unit ................................................ 36

[1] Appearance of the Components and Refrigerant Circuit........ 36

[2] Control Box ............................................................................ 41

[3] Circuit Board .......................................................................... 44

4 Remote Controller ........................................................................ 49

[1]

Functions and Specifications of MA and ME Remote Controllers

.... 49

[2] Group Setting and Interlocking Settings that are Made on

the ME Remote Controller .................................................... 50

[3]

Interlocking Setting that is Made on the MA Remote Controller

...... 53

[4] Switching to the built-in Thermo on the remote controller ...... 54

5 Electrical Wiring Diagram ............................................................ 55

[1] Compressor unit .................................................................... 55

[2] Heat exchanger unit................................................................ 56

[3]

Power Dispatching Extension Unit for the Transmission Lines

.. 57

6 Refrigerant Circuit ........................................................................ 58

[1] Refrigerant Circuit Diagram .................................................... 58

[2] Functions of Principal Parts.................................................... 59

7 Control.......................................................................................... 62

[1] Dip Switch Functions and Their Factory Settings .................. 62

[2] Controlling the Outdoor Unit .................................................. 68

[3] Operation Flow Chart ............................................................ 75

8 Test Run ...................................................................................... 80

[1] Check Items before Test Run.................................................. 80

[2] Test Run Method .................................................................... 80

[3] Operating Characteristics and Refrigerant Amount................ 81

[4] Adjustment and Judgment of Refrigerant Amount ................ 81

[5] Refrigerant Volume Adjustment Mode Operation .................. 83

[6] Symptoms that do not Signify Problems ................................ 85

[7]

Standard Operation Data (Reference Data)

.............................. 86

9 Troubleshooting............................................................................ 88

[1] Check Code List .................................................................... 88

[2] Responding to Error Display on the Remote Controller ........ 91

[3] Investigation of Transmission Wave Shape/Noise .................. 124

[4] Troubleshooting of Principal Parts .......................................... 127

[5] Refrigerant Leak .................................................................... 143

[6] Compressor Replacement Instructions .................................. 145

[7] Collecting the Cooling Liquid from the Accumulator .............. 146

0 LED display .................................................................................. 147

[1] LED Monitor Display .............................................................. 147

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Safety Precautions

Symbols used in the text

Warning:

Failure to follow all instructions may result in serious personal injury or death.

Caution:

Failure to follow all instructions may result in personal injury or damage to the unit.

Symbols used in the illustrations

: Indicates an action that must be avoided.

: Indicates that important instructions must be followed.

: Indicates a part which must be grounded.

: Beware of electric shock (This symbol is displayed on the main unit label.) <Color : Yellow>

Warning : Carefully read the labels affixed to the main unit.

Before installing the unit, be sure to carefully read all of the following safety precautions.

These precautions provide important information regarding safety. Be sure to follow them to ensure safety.

After reading this handbook, hand it over to those who will be using the unit. The user of the unit should keep this manual at hand and make it available to those who will be performing repairs or relocating the unit. Also, make it available to the new user when the user changes hands.

Be sure to carefully follow each step in this handbook when installing the unit.

• Improper installation may result in water leak,

electric shock, smoke or fire.

Securely attach the terminal cover (panel) on the unit.

• If installed improperly, dust and/or water may enter

the unit and present a risk of electric shock, smoke, or fire.

Only use Refrigerant R410A as indicated on the unit when installing or relocating the unit.

• The use of any other refrigerant or an introduction of

air into the unit circuit may cause the unit to run an abnormal cycle and cause the unit to burst.

Do not make any changes or modifications to the unit. In case of problems, consult the dealer.

• If repairs are not made properly, the unit may leak

water and present a risk of electric shock, or it may produce smoke or cause fire.

Have all electrical work performed by a licensed electrician according to the local regulations and the instructions given in this manual. Secure a circuit designated exclusively to the unit.

• Improper installation or a lack of circuit capacity may

cause the unit to malfunction or present a risk of electric shock, smoke, and fire.

Have the unit professionally installed.

• Improper installation by an unqualified person may

result in water leak, electric shock, or fire.

Only use specified cables for wiring. Securely connect each cable, and make sure that the cables are not straining the terminals.

• Cables not connected securely and properly may

generate heat and cause fire.

Place the unit on a stable, level surface that withstands the weight of the unit to prevent the unit from tipping over or falling causing injury as a result.

Take necessary safety measures against typhoons and earthquakes to prevent the unit from falling over.

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When relocating the air conditioner, consult the dealer or a specialist.

• Improper installation may result in water leak,

electric shock, or fire.

• Consult the dealer for necessary measures to take.

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

• If leaked gas refrigerant is exposed to a heart

source such as fan heater, stove, and electric grill, noxious gases may form.

In the event of a refrigerant gas leak, provide adequate ventilation to the room.

• If leaked refrigerant gas is exposed to a heat source,

noxious gases may form.

With All-Fresh type air conditioners, outdoor air may be directly blown into the room upon thermo off. Take this into consideration when installing the unit.

• Direct exposure to outdoor air may present a health

hazard, and it may also cause food items to deteriorate.

When installing the unit in a small room, safeguard against hypoxia that results from leaked refrigerant reaching the threshold level.

Do not touch the fins on the heat exchanger with bare hands: they are sharp and dangerous.

Precautions for Handling Units for Use with R410A

Caution

Warning : Carefully read the labels affixed to the main unit.

Do not try to defeat the safety features of the devices, and do not change the settings.

• Defeating the safety features on the unit such as the

pressure switch and temperature switch or using parts other than those specified by Mitsubishi Electric may result in fire or explosion.

Use refrigerant pipes made of C1220 phosphorus deoxidized copper categorized under H3000 (Copper and Copper Alloy Seamless Pipes and Tubes), a standard set by JIS. Keep the inner and outer surfaces of the pipes clean and free of contaminants such as sulfur, oxides, dust/dirt, shaving particles, oils, and moisture.

• Contaminants inside the refrigerant piping will cause

the refrigerant oil to deteriorate.

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

• If refrigerant and /or refrigerant oil left on these tools

are mixed in with R410A, or if water is mixed with R410A, it will cause the refrigerant to deteriorate.

• Since R410A does not contain chlorine, gas-leak

detectors for conventional refrigerators will not work.

Only use specified parts.

• Have the unit professionally installed.

Improper installation may cause water leak, electric shock, smoke, or fire.

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

• If other types of valves are used, the vacuum pump

oil will flow back into the refrigerant cycle and cause the refrigerator oil to deteriorate.

Do not use the existing refrigerant piping

• The old refrigerant and refrigerator oil in the existing

piping contain a large amount of chlorine, which will cause the refrigerator oil in the new unit to deteriorate.

• R410A is a high-pressure refrigerant, and the use of

the existing piping may result in bursting.

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Before Installing the Unit

Warning

Caution

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

• If dust, dirt, or water enters the refrigerant cycle, it

may cause the oil in the unit to deteriorate or may cause the compressor to malfunction.

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

• A large amount of mineral oil will cause the

refrigerating machine oil to deteriorate.

Do not use a charging cylinder.

• The use of charging cylinder will change the

composition of the refrigerant and lead to power loss.

Exercise special care when handling the tools.

• An introduction of foreign objects such as dust, dirt,

or water into the refrigerant cycle will cause the refrigerating machine oil to deteriorate.

Only use R410A refrigerant.

• The use of refrigerants containing chlorine (i.e. R22)

will cause the refrigerant to deteriorate.

Use liquid refrigerant to charge the system.

• Charging the unit with gas refrigerant will cause the

refrigerant in the cylinder to change its composition and will lead to a drop in performance.

Do not install the unit in a place where there is a possibility of flammable gas leak.

• Leaked gas accumulated around the unit may start a

fire.

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

• The unit is not designed to provide adequate

conditions to preserve the quality of these items.

When installing the unit in a hospital, take necessary measures against noise.

• High-frequency medical equipment may interfere

with the normal operation of the air conditioning unit or the air conditioning unit may interfere with the normal operation of the medical equipment.

Do not use the unit in an unusual environment.

• The use of the unit in the presence of a large

amount of oil, steam, acid, alkaline solvents, or special types of sprays may lead to a remarkable drop in performance and/or malfunction and presents a risk of electric shock, smoke, or fire.

• The presence of organic solvents, corroded gas

(such as ammonia, sulfur compounds, and acid) may cause gas or water leak.

Do not place the unit on or over things that may not get wet.

• When humidity level exceeds 80% or when the

drainage system is clogged, indoor units may drip water.

• Installation of a centralized drainage system for the

outdoor unit may also need to be considered to prevent water drips from the outdoor units.

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Page 6

Before Installing (Relocating) the Unit or Performing Electric Work

Caution

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

• Water on the unit presents a risk of electric shock.

Install a breaker for current leakage at the power source to avoid the risk of electric shock.

• Without a breaker for current leakage, there is a risk

of electric shock, smoke, or fire.

Use wires that are specified in the installation manual.

• The use of other types of wires presents a risk of

electrical current leak, electric shock, smoke, or fire.

Periodically check the platform on which the unit is placed for damage to prevent the unit from falling.

• If the unit is left on a damaged platform, it may

topple over, causing injury.

Ground the unit.

• Do not connect the grounding on the unit to gas

pipes, water pipes, lightning rods, or the grounding terminals of telephones. Improper grounding presents a risk of electric shock, smoke, fire, or the noise caused by improper grounding may cause the unit to malfunction.

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

• The use of large-capacity fuses, steel wire, or

copper wire may damage the unit or cause smoke or fire.

When installing draining pipes, follow the instructions in the manual, and make sure that they properly drain water so as to avoid dew condensation.

• If not installed properly, they may cause water leaks

and damage the furnishings.

Make sure the wires are not subject to tension.

• If the wires are too taut, they may break or generate

heat and/or smoke and cause fire.

Exercise caution when transporting products.

• Do not try to move equipments over 20kg (approx. 44 lbs.) alone.

• Do not use the PP bands used on some packages for transportation.

• Wear protective gloves to avoid injury caused by touching the fins on the heat exchanger with bare hands.

• When using a suspension bolt to transport the heatsource unit, use a four-point suspension. A threepoint suspension does not provide adequate stability and presents a risk of accidents.

Properly dispose of the packing materials.

• Things such as nails and wood pieces may be included in the package. Dispose of them properly to prevent injury.

• Plastic bags present a choking hazard to children. Tear up the plastic bags before disposing of them to prevent accidents.

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Before the Test Run

Caution

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

• Keep the unit on throughout the season. Turning the unit off during the season may cause problems.

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

• Allow for at least five minutes before turning off the unit; otherwise, the unit may leak water or experience other problems.

Do not operate the unit without panels and safety guards in their proper places.

• They are there to keep the users from injury from accidentally touching rotating, high-temperature, or high-voltage parts.

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

• Depending on the state of the refrigerant in the system, certain parts of the unit such as the pipes and compressor may become very cold or hot and may subject the person to frost bites or burning.

Do not operate switches with wet hands to avoid electric shock.

Do not operate the unit without air filters.

• Dust particles in the air may clog the system and cause malfunction.

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¡¡

Read Before Servicing

[1] Items to Be Checked

1. Verify the type of refrigerant used by the unit to be serviced.

Refrigerant Type : R410A

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

Look in this service handbook for symptoms relating to the refrigerant cycle.

3. Be sure to carefully read the Safety Precautions at the beginning of this document.

4. Prepare necessary tools: Prepare tools exclusive for use with each refrigerant type.

Refer to P7 for more information.

5. If the refrigerant circuit is opened (to repair a gas leak etc.), the dryer needs to be replaced.

Only use the dryer designed specifically for Citi Multi YGM-A. The use of other dryers may result in malfunctions. ✻ Replace the dryer after completing all the repairs on the refrigerant circuit.

(If left exposed to air, the dryer will absorb moisture. Replace the dryer as quickly as possible after removing the old one.)

✻ When all of the following conditions are met, the replacement of drier is not necessary.

(1) Do not leave the refrigerant circuit longer than 2 hours. (2) Cover the opening end with a cap or tape to keep moisture from entering. (3) Also cover the opening end of the new part with a cap or tape (4) Do not perform the task in the rain. (5) Evacuate the refrigerant circuit as specified.

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

• Use pipes made of phosphorus deoxidized copper. Keep the inner and outer surfaces of the pipes clean and

free of contaminants such as sulfur, oxides, dust/dirt, shaving particles, oils, and moisture.

• Contaminants inside the refrigerant piping will cause the refrigerant oil to deteriorate.

7. If there is a gas leak or if the remaining refrigerant is exposed to an open flame, a noxious gas hydrofluoric acid may form. Keep workplace well ventilated.

CAUTION

1. Install new pipes immediately after removing old ones to keep moisture out of the refrigerant circuit.

2. Chloride in some types of refrigerants 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.

[Necessary tools for use with R410A (Adaptability of tools that are for use with R22 and R407C)]

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

Tools/Materials NotesUse

Gauge Manifold Charging Hose Refrigerant Recovery Equipment Refrigerant Cylinder

Refrigerant Cylinder Charging Port Flare Nut

Evacuating, refrigerant charging Evacuating, refrigerant charging Refrigerant recovery Refrigerant charging

Refrigerant charging Connecting the unit to piping

5.09MPa on the High-pressure side. Hose diameter larger than the conventional ones.

Write down the refrigerant type. Pink in color at the top of the cylinder. Hose diameter larger than the conventional ones. Use Type-2 Flare nuts. (That are in compliance with JIS B 8607).

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

Tools/Materials NotesUse

Gas leak detector Vacuum Pump

Flare Tool

Refrigerant Recovery Equipment

Detection of gas leaks Vacuum drying

Flare machining of piping

Recovery of refrigerant

The ones for HFC type refrigerant may be used. May be used if a reverse flow check adaptor is attached. Changes have been made in the flare machining dimension. Refer to the next page. May be used if designed for use with R410A.

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

Tools/Materials NotesUse

Vacuum Pump with a Check valve Bender Torque Wrench

Pipe Cutter Welder and Nitrogen Cylinder Refrigerant Charging Meter Vacuum Gauze

Vacuum drying Bending pipes Tightening flare nuts

Cutting pipes Welding pipes Refrigerant charging Checking vacuum degree

Only ø 12.70 (1/2”) and ø 15.88 (5/8”) have a larger flare machining dimension.

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

Tools/Materials NotesUse

Charging Cylinder Refrigerant Charging Must not be used with R410A-type units.

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

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Type-O pipes Soft copper pipes (annealed copper pipes)

They can be bent easily with hands.

Type-1/2H pipes Hard copper pipes (straight pipes)

Stronger than type-O pipes of the same radial thickness.

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[3] Piping Materials

NOOK

New Piping Existing Piping

Do not use the existing piping!

• The distinction between type-O and type-1/2H pipes is made based on the strength of the pipes themselves.

• Type-O pipes are soft and can easily be bent with hands.

• Type-1/2H pipes are considerably stronger than type-O pipes of the same radial thickness.

Use pipes made of phosphorus deoxidized copper. Since the operation pressure of the units that use R410A is higher than that of the units for use with R22, use pipes with 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.)

Maximum Operation Pressure Applicable Refrigerants

3.45 MPa

4.30 MPa

R22, R407C etc. R410A

✻ Use pipes that meet the local standards.

Type-O pipes

Type-1/2H or

H pipes

Size(mm) Size(inch) Radial Thickness(mm) Type

ø 6.35 ø 9.52

ø 12.7 ø 15.88 ø 19.05

ø 22.2

ø 25.4 ø 28.58 ø 31.75 ø 34.93

1/4” 3/8” 1/2” 5/8” 3/4” 7/8”

1” 1 1/8” 1 1/4” 1 3/8”

0.8t

1.0t

1.1t

1.2t

✻ Although it was possible to use type-O for pipes with a size of up to ø19.05 (3/4”) with conventional refriger-

ants, use type-1/2H pipes for units that use R410A. (Type-O pipes may be used if the pipe size is

ø19.05 and

the radial thickness is 1.2t.)

✻ The table shows the standards in Japan. Using this table as a reference, choose pipes that meet the local

standards.

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“Radial thickness” and “Refrigerant Types” are indicated on the insulation material on the piping materials for the new refrigerant.

Indication of the radial thickness (mm) Indication of the refrigerant type

Radial thickness Symbols

0.8

1.0

08 10

Refrigerant type Symbol Type1 R22, R407C Type2 R410A

1 2

The type of piping materials can also be found on the package. <Example of a label found on the package>

~08-2~

Appears every 1 m

2 : common to type 1 and type 2 Refrigerant Type : R22,R407C,R410A Bore diameter and radial thickness of the copper piping : 9.52✕0.8, 15.88✕1.0

The flare machining dimensions for units that use R410A is larger than those for units that use R22 in order to increase air tightness.

If a clutch type flare tool is used to machine flares on units that use R410A, make the protruding part of the pipe between 1.0 and 1.5mm. Copper pipe gauge for adjusting the length of pipe protrusion is useful.

Flare Machining Dimension(mm)

External dimension of pipes

Size

Dimension A

R410A

ø 6.35 ø 9.52

ø 12.7 ø 15.88 ø 19.05

1/4” 3/8” 1/2” 5/8” 3/4”

9.1

13.2

16.6

19.7

24.0

R22

9.0

13.0

16.2

19.4

23.3

Dimension A

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

Flare nut dimension(mm)

External dimension of pipes

Size

Dimension B

R410A(Type2)

ø 6.35

ø 9.52

ø 12.7 ø 15.88 ø 19.05

1/4” 3/8” 1/2” 5/8” 3/4”

17.0

22.0

26.0

29.0

36.0

R22(Type1)

17.0

22.0

24.0

27.0

36.0

Dimension B

✻ The table shows the standards in Japan. Using this table as a reference, choose pipes that meet the local

standards.

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Store the pipes to be used indoors. (Warehouse at site or owner’s warehouse) Storing them outdoors may cause dirt, waste, or water to infiltrate.

Both ends of the pipes should be sealed until immediately before brazing. Wrap elbows and T’s in plastic bags for storage.

✻

The new refrigerator oil is 10 times more hygroscopic than the conventional refrigerator oil (such as Suniso). Water infiltration in the refrigerant circuit may deteriorate the oil or cause a compressor failure. Piping materials must be stored with more care than with the conventional refrigerant pipes.

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[4] Storage of Piping Material

1. Storage location

2. Pipe sealing before storage

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Use ester oil, ether oil or alkylbenzene (small amount) as the refrigerator oil to coat flares and flange connections.

Reason :

1. The refrigerator oil used for the equipment is highly hygroscopic and may introduce water inside.

Notes :

• Introducing a great quantity of mineral oil into the refrigerant circuit may also cause a compressor failure.

• Do not use oils other than ester oil, ether oil or alkylbenzene.

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[5] Piping Machining

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No changes from the conventional method, but special care is required so that foreign matter (ie. oxide scale, water, dirt, etc.) does not enter the refrigerant circuit.

Example : Inner state of brazed section

When non-oxide brazing was not used When non-oxide brazing was used

Items to be strictly observed :

1. Do not conduct refrigerant piping work outdoors on a rainy day.

2. Apply non-oxide brazing.

3. Use a brazing material (BCuP-3) which requires no flux when brazing between copper pipes or between a copper pipe and copper coupling.

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

Reasons :

1. The new refrigerant oil is 10 times more hygroscopic than the conventional oil. The probability of a machine failure if water infiltrates is higher than with conventional refrigerant oil.

2. A flux generally contains chlorine. A residual flux in the refrigerant circuit may generate sludge.

Note :

• Commercially available antioxidants may have adverse effects on the equipment due to its residue, etc. When applying non-oxide brazing, use nitrogen.

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[6] Brazing

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No changes from the conventional method. Note that a refrigerant leakage detector for R22 or R407C cannot detect R410A leakage.

Halide torch R22 or R407C leakage detector

Items to be strictly observed :

1. Pressurize the equipment with nitrogen up to the design pressure and then judge the equipment’s airtightness, taking temperature variations into account.

2. When investigating leakage locations using a refrigerant, be sure to use R410A.

3. Ensure that R410A is in a liquid state when charging.

Reasons :

1. Use of oxygen as the pressurized gas may cause an explosion.

2. Charging with R410A gas will lead the composition of the remaining refrigerant in the cylinder to change and this refrigerant can then not be used.

Note :

• A leakage detector for R410A is sold commercially and it should be purchased.

1. Vacuum pump with check valve A vacuum pump with a check valve is required to prevent the vacuum pump oil from flowing back into the refrigerant circuit when the vacuum pump power is turned off (power failure). It is also possible to attach a check valve to the actual vacuum pump afterwards.

2. Standard degree of vacuum for the vacuum pump Use a pump which reaches 65Pa or below after 5 minutes of operation. In addition, be sure to use a vacuum pump that has been properly maintained and oiled using the specified oil. If the vacuum pump is not properly maintained, the degree of vacuum may be too low.

3. Required accuracy of the vacuum gauge Use a vacuum gauge that can measure up to 650Pa. Do not use a general gauge manifold since it cannot measure a vacuum of 650Pa.

4. Evacuating time

• Evacuate the equipment for 1 hour after 650Pa has been reached.

• After envacuating, leave the equipment for 1 hour and make sure the that vacuum is not lost.

5. Operating procedure when the vacuum pump is stopped In order to prevent a backflow of the vacuum pump oil, open the relief valve on the vacuum pump side or loosen the charge hose to drawn in air before stopping operation. The same operating procedure should be used when using a vacuum pump with a check valve.

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[7] Airtightness Test

[8] Vacuuming

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Recommended vacuum gauge : ROBINAIR 14010 Thermistor Vacuum Gauge

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

To prevent vacuum pump oil from flowing back into the refrigerant circuit upon turning off the vacuum pump’s power

source, use a vacuum pump equipped with a reverse flow check valve.

A check valve may also be added to the vacuum pump currently in use.

2. Standard of vacuum degree (Photos 1 and 2)

Use a vacuum pump that shows a vacuum degree of 65Pa or less after 5 minutes of operation. Use a pump well-

maintained with an appropriate lubricant.

3. Required precision of vacuum gauge

Use a vacuum gauge that registers a vacuum degree of 650Pa and measures at intervals of 130Pa. (A recommended

vacuum gauge is shown in Photo 2.)

Do not use a vacuum gauge that does not register a vacuum degree of 650Pa.

4. Evacuation time

• After the vacuum gauge has registered the vacuum degree of 650Pa, evacuate for 1 hour. (A thorough vacuum drying

removes moisture in the pipes.)

• Verify that the vacuum degree has not risen by more than 130Pa 1 hour after evacuation. A rise by less than 130Pa is

acceptable.

• If it has exceeded by more than 130Pa, conduct vacuuming following the instructions in the “6. Special vacuum drying”

section.

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 650Pa or lower degree of vacuum cannot be attained after 3 hours of evacuation, it is likely that water has

penetrated the system or that there is a leak. When water infiltration is suspected, vacuum with nitrogen gas.

After breaking the vacuum, pressurize the system with nitrogen gas to a degree of 0.05MPa, and conduct an evacuation

again. Repeat it until 650Pa or lower degree of vacuum is attained or the vacuum pressure rise will be lost.

• Only use nitrogen gas for vacuum breaking. (Use of oxygen may cause an explosion.)

Photo 1 15010H Photo 2 14010

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[9] Vacuum Drying

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R410A must be in a liquid state when charging.

For a cylinder with a syphon attached For a cylinder without a syphon attached

Cylinder color identification R407C-Gray Charged with liquid refrigerant

R410A-Pink

Reasons :

Note :

• In the case of a cylinder with a syphon, liquid R410A is charged without turning the cylinder up side down. Check the type of cylinder before charging.

Cylin-

der

Cylin-

der

Valve

Val ve

Liquid

R410A is a pseudo-azeotropic refrigerant (boiling point R32 = -52˚C, R125 = -49˚C) and can roughly be handled in the same way as R22; however, be sure to fill the refrigerant from the liquid side, for doing so from the gas side will somewhat change the composition of the refrigerant in the cylinder.

When refrigerant leaks, additional refrigerant may be charged. (Add the refrigerant from the liquid side.) ✻Refer to 9-[5].

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[10] Changing Refrigerant

[11] Remedies to be taken in case of a refrigerant leak

Page 18

Composition (wt%) Type of refrigerant

Chloride Safety Class Molecular Weight Boiling Point Steam Pressure (25

˚C,MPa)(gauge)

Saturated Steam Density (25

˚C,kg/m3) Flammability Ozone Depletion Coefficient (ODP)✻1 Global Warming Coefficient (GWP)✻2 Refrigerant charging method Addition of refrigerant in case of a leak

R410A

R32/R125

(50/50)

Simulated azeotropic

refrigerant

Not contained

A1/A1

72.6

-51.4

1.557

64.0

Non-flammable

1730

Liquid charging

Possible

R407C

R32/R125/R134a

(23/25/52)

Non-azeotropic

refrigerant

Not contained

A1/A1

86.2

-43.6

0.9177

42.5

Non-flammable

1530

Liquid charging

Possible

New Refrigerant

(HFC system)

Conventional Refrigerant

(HCFC system)

R22 R22

(100)

Single refrigerant

Contained

86.5

-40.8

0.94

44.4

Non-flammable

0.055 1700

Gas charging

Possible

✻1: When CFC11 is used as a reference ✻2: When CO

2 is used as a reference

- 16 -

[12] Characteristics of the Conventional and the New Refrigerants

1. Chemical property

As with R22, the new refrigerant (R410A) is low in toxicity and a chemically stable non-flammable refrigerant. However, because the specific gravity of steam is greater than that of air, leaked refrigerant in a closed room will accumulate at the bottom of the room and may cause hypoxia. Also, leaked refrigerant exposed directly to an open flame will generate noxious gasses. Use the unit in a well-ventilated room.

R410A

MPa

0.30

0.70

1.34

2.31

3.73

4.17

-20 0 20 40 60 65

R407C

MPa

0.18

0.47

0.94

1.44

2.44

2.75

R22

MPa

0.14

0.40

0.81

1.44

2.33

2.60

Pressure (gauge)

Temperature (

˚C)

3. Pressure Characteristics

The pressure in the units that use R410A is 1.6 times as great as that in the units that use R22.

2. Refrigerant Composition

Because R410A is a simulated azeotropic refrigerant, it can be handled in almost the same manner as a single refrigerant such as R22. However, if the refrigerant is removed in the vapor phase, the composition of the refriger ant in the cylinder will somewhat change. Remove the refrigerant in the liquid phase. Additional refrigerant may be added in case of a refrigerant leak.

Page 19

- 17 -

Refrigerant Refrigerating machine oil

R22 R407C R410A

Mineral oil

Ester oil Ester oil

[13] 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 refrigerant system. Please note that the ester oil sealed in the unit is not the same as commercially available ester oil.

Cause Symptom

Clogged expansion valve and capillary Poor cooling performance Compressor overheat Poor motor insulation Motor burning Coppering of the orbiting part Locking Burning in the orbiting part

Expansion valve/capillary Poor cooling performance Drier clogging Compressor overheat

Burning in the orbiting part Expansion valve and capillary clogging Poor cooling performance Compressor overheat Burning in the orbiting part

Effects on the refrigeration cycle

Sludge formation Generation of acid Oxidization Oil degradation

Water infiltration

Air infiltration

Infiltration

contaminants

Dust, dirt

Mineral oil etc.

Expansion valve and capillary freeze

Hydrolysis

Oxidization

Adhesion to expansion valve and capillary

Infiltration of contaminants into the compressor

Sludge formation and adhesion

Oil degradation

2. Effects of the ✻Contaminants in the System

Refrigerating machine oil used in the HFC system must be handled more carefully than conventional mineral oils. The table below shows the effects of air, moisture, and contaminants in the refrigerating machine oil on the refrigeration cycle.

✻ “ Contaminants ” is defined as moisture, air, process oil, dust/dirt, the wrong types of refrigerant and refrigerat-

ing machine oil.

Page 20

OK NO

➀ Follow ordinance of your governmental organization for technical standard related to electrical equipment, wiring

regulations, and guidance of each electric power company.

➁ Wiring for control (hereinafter referred to as transmission line) shall be (5cm or more) apart from power source wiring so

that it is not influenced by electric noise from power source wiring. (Do not insert transmission line and power source wire in the same conduit.)

➂ Be sure to provide designated grounding work to outdoor unit. ➃ Give some allowance to wiring for electrical part box of indoor and outdoor units, because the box is sometimes removed

at the time of service work.

➄ Never connect 380~415V(220~240V )power source to terminal block of transmission line.If connected,electrical parts

will be burnt out

➅ Use 2-core shield cable for transmission line. If transmission lines of different systems are wired with the same multiple-

core cable, the resultant poor transmitting and receiving will cause erroneous operations.

Outdoor

unit

Indoor unit

Remote

controller

2-core cable

Outdoor

unit

Remote

controller

Indoor unit

Multiple-

core cable

Type of cable

Cable diameter

Remarks

Sheathed 2-core cable (unshielded) CVV

0.3

~ 1.25mm

(0.75 ~ 1.25mm2) ✻1

More than 1.25mm

Shielding wire (2-core) CVVS or CPEVS

When 10m is exceeded, use cables with the same specification as transmission cables.

0.3 ~ 1.25mm

(0.75 ~ 1.25mm2) ✻1

Max length : 200m

Transmission cables M-NET Remote controller cables MA Remote controller cables

CVVS : PVC insulated PVC jacketed shielded control cable CPEVS : PE insulated PVC jacketed shielded communication cable CVV : PV insulated PVC sheathed control cable

—

✻

1 Connected with simple remote controller.

- 18 -

™™

Restrictions

[1] Electrical Work & M-NET control

1. Attention

2. Types of control cable

Page 21

101

Main

201

202

000

247

Address (1) setting varies depending on the system configuration. See “[3] Examples of system connection” section for details.

Unit or controller Symbol

Address

Setting method

setting range

Indoor unit Main/sub units IC

Lossnay LC

M-NET remote controller

Main remote controller RC

Sub remote controller RC

MA remote controller MA

Outdoor unit OC

System controller

Group remote controller GR, SC

System remote controller SR, SC

ON/OFF remote controller AN, SC

ST, SCSchedule timer (for M-NET)

Centralized controller TR, SC

(Note 5)

LM adapter SC

0, 01~50

(Note 1)

101~150

151~200

(Note 2)

0, 51~100

(Note 1, 3, 4)

52~100

(Note 3, 4)

201~250

0, 201~250

201~250

Notes:

Factory

setting

Type and method of switch setting

Switch setting vary depending on the system configuration. Make sure to read “[3] Examples of system connection” before conducting electrical work. Turn off the power before setting the switch. Operating the switch while the unit is being powered will not change the setting, and the unit will not properly function.

1. Address setting is not required for a single refrigerant system (with a few exception).

2. When setting M-NET remote controller address to “200,” make it “00.”

3. When setting the outdoor unit and outdoor auxiliary unit address to “100,” make it “50.”

4. When an address in a system overlapped with the outdoor unit or BC controller (Main) address of other refrigerant system, choose an another address within theset range that is not in use (with a few exceptions).

5. When controlling the K-control units; (1) A K-transmission converter (Model name: PAC-SC25KA) is required. To set the address for the K-transmission converter,

set it to thelowest address of the K-control unit to be controlled + 200.

(2) Set the address of the system controller (G-50A) to “0.” The K-control unit can only be controlled by the system controller

with theaddress “0.”

(3) To control both K-control unit and M-NET model unit, make the address of the K-control unit larger than that of the indoor

unit of M-NET model. Group-register on the system controller so that the group No. and the lowest address of the K-controlled indoor units belonging to thegroup will be identical.

Use the address that equals the sum of the smallest indoor unit address in the same refrigerant system and 50.

Use the address that equals the sum of the smallest address of the indoor unit out of all the indoor units that are connected to the BC controller and 50. When a sub BC controller is connected, the automatic start up function will not be available.

Auxiliary units

Hex. unit

BC controller (Sub)

Use the address that equals the sum of the address of the outdoor unit in the same refrigerant system and 1.

BC controller (Main)

Choose any number within the range of addresses shown left. However when using with the upper SC setting, or wishing to control the k-control units, set to “0.”

Assign the smallest address to the indoor unit to become the main unit within the same group, and then use sequential numbers to assign an address to all the indoor units in the group. (Note 5) If applicable, set the sub BC controllers in an R2 system in the following order:

(1)

Indoor unit to be connected to the main BC controller

(2)

Indoor unit to be connected to No.1 sub BC controller

(3)

Indoor unit to be connected to No.2 sub BC controller

Set the address so that (1) < (2) < (3)

Assign any unused address after setting all indoor units.

Set to the lowest address of the indoor main unit within the same group + 150.

Set to the lowest No. of the group to be controlled + “200.”

Set to the lowest No. of the group desired tobe controlled + “200.”

Choose any number within the range of addresses shown left.

Choose any number within the range of ad-dresses shown left.

Choose any number within the range of addresses shown left.

Set to the lowest address of the indoor main unit within the same group + 100.

No address setting required. (When operating with 2 remote controllers, the main/sub selector switch must be set.

- 19 -

[2] Types of Switch Setting and Address Setting

1. Switch setting

2. Address setting

Page 22

- 20 -

System Configuration

Single refrigerant system

___

Multiple refrigerant system

Connection with the system controller

Power supply unit for the transmission lines

Unnecessary

Unnecessary (Note2) (Supplied from the outdoor unit)

Applicable

Grouping operation of different refrigerant systems

n/a

applicable

applicable // n/a

The setting of the power supply selecting connector

Use CN41 as is (Factory setting)

Replace the CN41 with CN40 on only one of the outdoor units.

✻

Connect the S terminal of the TB7 (terminal block on the outdoor unit) on the outdoor unit whose

CN41 was replaced with CN40 to the earth terminal of the electric box.

Use CN41 as is (Factory setting)

n/a

Connected with the indoor units

Connected with the centralized system

Notes:

1. Will limit the total connectable units in the refrigerant system.

2. The need for a power supply unit for the transmission lines depends on the system configuration. Refer to “ DATA BOOK ” for more details.

Setting the power supply selecting connector for the outdoor unit (Factory setting: CN41 is connected.)(2)

System configuration Setting of the centralized controller switch (SW 2-1)

Connection system with the system controller n/a Leave it to OFF. (Factory setting)

Connection system with the system controller applicable (Note 1) ON

Note:

1. When connecting only the LM adapter, leave SW2-1 to OFF.

Note:

Refer to section “ 7 [2] 12. Demand control ” for detailed information on demand control settings.

Setting the centralized control switch on the outdoor unit (factory setting: SW2-1 OFF )(3)

Category

Output

Input

Usage

Cooling operation is disabled (thermo OFF) by the external input to the outdoor units.

✻ Can be used as an on-demand control for each refrigerant

system.

Quiet operation of outdoor units is run with an external input to the outdoor units. (Night mode can be run under the following conditions: Outdoor air temperature below 30

˚C when running a cooling operation

and above 3˚C when running a heating operation.)

Forces the outdoor units to run a fan operation by receiving the snow signal from the snow sensor. The operation mode can be switched between cooling and heating with an external input to the outdoor units.

Outdoor units’ signal output

✻ Can be used as a device that displays the operation status ✻ Can run an interlocking control operation with external devices

Function

Demand (level)

Night mode or Demand (Level) ✻

Note1

Snow sensor Signal input (level)

You can switch the operation mode between cooling and heating by input from the outside to the outdoor unit.

Auto-changeover

Compressor in operation

Abnormal operation status

CN3S

CN3N

CN3D

CN51

Terminal to be used

Various types of control using the connectors on the outdoor unit for input-output signal (various types of connections with optional parts)

(4)

Page 23

TB5 TB

A1 B2

MARC

TB5

TB5 TB

0000

TB5 TB

A1 B2

L11

L3 L4

L12 L13

A1 B2

a. Indoor/outdoor transmission line

Farthest length (1.25mm2 or more)

L2 + L3 + L4 200m

L2 + L11 + L12 + L13 200m

b. Centralized control transmission line

No connection is required.

c. MA remote controller wiring

Total length (0.3 ~ 1.25mm2)

m1 200m

m2 + m3 200m

m4 + m5 200m

Note 1. For the connection to the terminal block of compact

remote controller, employ wire with a diameter of 0.75

~ 1.25mm

Control wiring example

Group

Prohibited items Allowable length

1. M-NET and MA remote controllers can not be connected to-

gether to the indoor unit within the same group.

2. MA remote controller of 3 units or more can not be connected

to the indoor unit within the same group.

3. When the total number of indoor units exceeds 26 units In-

cluding that above Type 200, a transmission booster is re-

quired.

4. In the case when start/stop input (CN32, CN51, CN41) is used

by indoor group operation, the “Automatic address set-up”

can not be employed. Please refer to 1. (2) “ Manual address

set-up.”

5. For the connection of LOSSNAY with more than 2 units in a

single refrigerant system, refer to the following “Connection

of 2 LOSSNAY units in refrigerant system.”

Interlocking with ventilation

– Example to use shielded wire –

Group

≤

M1M2

TB3

TB7

TB3

(00)

M1M2 M1M2M1M2

- 21 -

[3] Examples of system connection

1. System using MA remote controller

(1) In the case of single refrigerant system (Automatic address set-up)

Page 24

Wiring method • Address setting method

a. Indoor/outdoor transmission line

Apply jumper wiring connection between M1, M2 terminals of the indoor/outdoor transmission line terminal block

(TB3) on the outdoor unit (OC) and that of indoor/outdoor transmission line terminal block (TB5) on each indoor

unit (IC). (with non-polarity two wires)

❉ When the transmission line is long or noise sources are located near the unit, recommend to use shielded wire.

Connection of shielded wire:

For the earth of shielded wire, apply jumper wiring connection between the earth screw of OC and the S-terminal of

IC terminal block (TB5).

b. Centralized control transmission line

Connection is not required.

c. MA remote controller wiring

Connect the 1, 2 terminals of MA remote controller wiring terminal block (TB15) on IC to the terminal block of MA

remote controller (MA). (with non-polarity two wires)

❉ MA remote controller can be connected to A-type indoor unit or later.

For 2-remote controller operation:

To employ 2-remote controller operation, connect 1, 2 terminals of the terminal block (TB15) on IC to the terminal

block of two MA remote controllers.

❉ Set the main/sub selector switch of one MA remote controller to the sub remote controller. (For the setting method,

see the installation manual of MA remote controller.)

For indoor group operation:

For the group operation of IC, connect 1, 2 terminals of the terminal block (TB15) on all ICs within the same group,

and connect 1, 2 terminals of the terminal block (TB15) on another IC to the terminals of MA remote controller.

(with non-polarity two wires)

❉ To operate the indoor units with different function in the same group, refer to 1. (2).

d. LOSSNAY connection

Apply jumper wiring to connect M1, M2 terminals of the terminal block (TB5) on IC to the indoor/outdoor

transmission terminal block (TB5) on LOSSNAY (LC). (with non-polarity two wires)

❉ Linked and registered automatically with all indoor units within a refrigerant system.

❉ Please refer to the 1. (2) “Manual address set-up,” when interlocking partial indoor units with Lossnay, using

Lossnay alone without interlocking, interlocking indoor units and Lossnay for over 16 units within a refrigerant

system, or connecting LOSSNAY for over 2 units in a refrigerant system.

e. Switch setting

Address setting is not required.

Order

Unit or controller

Address

Setting method Caution

Factory

setting range

setting

Main unit IC

Not required – 00

1 Indoor unit

Sub unit IC

2 LOSSNAY LC Not required –

MA remote

Main uni

Hex. unit

t MA Not required –

Main

controller

Sub unit

Comp. unit

MA Sub unit

4 Outdoor unit OC

Not required –

5 Sub unit OS

• Refer to 1. (2) to operate indoor units with different function in the same group.

Set with main/sub selector switch.

- 22 -

Page 25

TB5 TB

A1 B2

TB5

TB5 TB

0403

TB5

A1 B2

L11

L3 L4

L12 L13

a. Indoor/outdoor transmission line

The same as 1. (1)

b. Centralized control transmission line

No connection is required.

c. MA remote controller wiring

The same as 1. (1)

Control wiring example

Group

Prohibited items Allowable length

1. M-NET and MA remote controllers can not be connected to-

gether to the indoor unit within the same group.

2. MA remote controller of 3 units or more can not be connected

to the indoor unit within the same group.

3. When the total number of indoor units exceeds 26 units in-

cluding that above Type 200, a transmission booster is re-

quired.

Interlocking with ventilation

– Example to use shielded wire –

Group

M1M2

TB3

TB7

(52)

TB3

M1M2 M1M2

- 23 -

1. System using MA remote controller

(2) In the case of single refrigerant system connecting 2 or more LOSSNAY units (Manual address set-up)

Page 26

- 24 -

1 Indoor unit

2 LOSSNAY

MA remote controller

4 Outdoor unit

Main unit

Sub unit

Main uni

Sub uni

Comp. unit

Hex. unit

01 ~ 50

Not required

51 ~ 100

Wiring method • Address setting method

a. Indoor/outdoor transmission line

The same as 1. (1)

Connection of shielded wire:

The same as 1. (1)

b. Centralized control transmission line

No connection is required.

c. MA remote controller wiring

The same as 1. (1)

For 2-remote controller operation:

The same as 1. (1)

For indoor group operation:

The same as 1. (1)

d. LOSSNAY connection

Apply jumper wiring to connect M1, M2 terminals of the terminal block (TB5) on the indoor unit (IC) to the terminal

block (TB5) on Lossnay (LC). (with non-polarity two wires)

❉ The interlocking registration of the indoor unit and Lossnay from the remote controller is required. (For the regis-

tration method, see the installation manual of remote controllers.)

e. Switch setting

Address setting is required as listed below.

Order

Unit or controller

Address

Setting method Caution

Factory

setting range

setting

• Set the lowest address within a same group to the indoor unit desired to be the main unit.

Set to the main unit address within a same group in serial order.

[Main unit +1, +2, +3, .... ]

Set any address after setting al

Set with main/sub selector switch.

5 Sub unit OS Oundoor unit address + 1

indoor units.

–

Main

• When operating indoor units with different function within a same group, assign the indoor unit with the most plenty of function to the main unit.

• Set the address not to be overlapped with the indoor unit address.

• When setting address to “100,” make it “50.”

The lowest address of indoor unit within refrigerant system + 50

Page 27

- 25 -

TB5 TB

A1 B2

TB5

TB5 TB

12 12

0402

TB5 TB15

A1 B2

L3 L4

L23L22 L24

a. Indoor/outdoor transmission line

Farthest length (1.25mm

or more) L2 + L3 + L4 200m L22 + L23 + L24 200m

b. Centralized control transmission line

Farthest length via outdoor unit (1.25mm

or more)

L2 + L3 + L4 + L31 + L22 + L23 + L24 500m

c. MA remote controller wiring

The same as 1. (1)

Control wiring example

Group

Prohibited items Allowable length

1. M-NET and MA remote controllers can not be connected together to the indoor unit within the same group.

2. MA remote controller of 3 units or more can not be connected to the indoor unit within the same group.

3. Do not connect together the terminal blocks (TB5) of the indoor unit connected to different outdoor units.

4. Replacement of the power supply selecting connector (CN41) on the outdoor unit should be done only on one outdoor unit.

5. Grounding of S-terminal of the centralized control terminal block (TB7) on outdoor unit should be done only on one outdoor unit.

6. When the total number of indoor units exceeds 26 units including that above Type 200, a transmission booster is required.

Interlocking with ventilation

– Example to use shielded wire –

Group

≤

M1M2

CN41→CN40

Replace

TB3

TB7

TB3

TB7

(54)

(53)

L31

TB3

Leave CN41 as it is.

TB3

Connect

M1M2 M1M2M1 M2

M1M2

M1M2 M1M2

1. System using MA remote controller

(3) In the case of different refrigerant grouping operation

Page 28

- 26 -

Wiring method • Address setting method

a. Indoor/outdoor transmission line

Apply jumper wiring connection between M1, M2 terminals of the indoor/outdoor transmission line terminal block

(TB3) on the outdoor unit (OC) and that of indoor/outdoor transmission line terminal block (TB5) on each indoor

unit (IC). (with non-polarity two wires)

❉ Make sure to use shielded wire.

Connecting of shielded wire:

The same as 1. (1)

b. Centralized control transmission line

Apply jumper wiring between M1, M2 terminals of centralized control transmission line terminal blocks (TB7) on

each OC. For one OC only, replace the power selecting connector (CN41) with (CN40).

❉ Make sure to use shielded wire.

Connecting of shielded wire:

Apply jumper wiring to connect the shielded earth to S-terminal of the terminal block (TB7) on each OC. Connect

Sterminal of the terminal block (TB7) on the one OC with (CN40) replaced to the earth screw ( ) of the electrical

parts box.

c. MA remote controller wiring

The same as 1. (1)

For 2-remote controller operation:

The same as 1. (1)

For indoor unit group operation:

The same as 1. (2)

d. LOSSNAY connection

The same as 1. (2)

e. Switch setting

Address setting is required as follows.

1 Indoor unit

2 LOSSNAY

MA remote controller

4 Outdoor unit

Main unit

Sub unit

Main unit

Sub unit

01 ~ 50

Not required

Sub unit

51 ~ 100

• Set the address not to be overlapped with the indoor unit address.

• When setting address to “100,” make it “50.”

Order

Unit or controller

Address

Setting method Caution

Factory

setting range

setting

• Set the lowest address within a same group to the indoor unit desired to be the main unit.

Set to the main unit address within a same group in serial order.

[Main unit +1, +2, +3, .... ]

Set any address after setting all indoor units.

–

Set by the main/sub selector switch.

The lowest address of indoor unit within refrigerant system + 50

Main

Hex. unit

Comp. unit

5 Sub unit OS Oundoor unit address + 1

Page 29

- 27 -

TB5 TB

A1 B2

TB5

TB5 TB

0403

TB5

A1 B2

L3 L4

L23 L24

L22

a. Indoor/outdoor transmission line

The same as 1. (3)

b. Centralized control transmission line

Farthest length via outdoor unit (1.25mm2 or more) L32 + L31 + L2 + L3 + L4 500m L32 + L22 + L23 + L24 500m L2 + L3 + L4 + L31 + L22 + L23 + L24 500m

c. MA remote controller wiring

The same as 1. (1)

Control wiring example

Group

Prohibited items Allowable length

1. M-NET and MA remote controllers can not be connected together to the indoor unit within the same group.

2. MA remote controller of 3 units or more can not be connected to the indoor unit within the same group.

3. Do not connect together the terminal blocks (TB5) of the indoor unit connected to different outdoor units.

6. When the total number of indoor units exceeds 26 units Including that above Type 200, a transmission booster is required.

Interlocking with ventilation

– Example to use shielded wire –

Group

Notes:

1. Leave SW2-1 as “OFF” when connecting LM adapter only.

2. LM adapter requires the power source of 1-phase AC 230V

Note 1

≤

4. Replacement of the power supply selecting connector (CN41) on the outdoor unit should be done only on one outdoor unit.

5. Grounding work is required for S-terminal of the centralized control transmission block (TB7) on one outdoor unit onl

CN41→CN40 Replace SW2-1 OFF→ON

M1M2

TB3

TB7

(52)

TB3

TB7

(54)

System controller

L31

L32

Note 2

TB3

M1M2 M1M2

M1M2

Connect

Note 1

Leave CN41 as it is. SW2-1 OFF→ON

1. System using MA remote controller

(4) In the case of connecting system controller to centralized control transmission line

Page 30

- 28 -

Wiring method • Address setting method

a. Indoor/outdoor transmission line

The same as 1. (3)

Connection of shielded wire:

The same as 1. (1)

c. MA remote controller wiring

The same as 1. (1)

For 2-remote controller operation:

The same as 1. (1)

For indoor group operation:

The same as 1. (1)

d. LOSSNAY connection

Apply jumper wiring to connect M1, M2 terminals of the terminal block (TB5) on (IC) to the terminal block (TB5)

on the indoor/outdoor transmission line terminal block (TB5) on Lossnay (LC). (with non-polarity two wires)

❉ The interlocking registration of the indoor unit and LOSSNAY from the system controller is required. (For the

registration method, see the installation manual of the system remote controllers.)

When connecting ON/OFF remote controller and LM adaptor only, the interlocking registration from the remote

controller is required.

e. Switch setting

Address setting is required as listed below.

1 Indoor unit

2 LOSSNAY

MA remote controller

4 Outdoor unit

Main unit

Sub unit

Main unit

Sub unit

01 ~ 50

Not required

Sub unit

• Set the address not to be overlapped with the indoor unit address.

• Conduct initial setting by the system controller with the same setting detail of indoor unit applied in MA remote controller wiring.

• When setting address to “100,” make it “50.”

Order

Unit or controller

Address

Setting method Caution

Factory

setting range

setting

• Set the lowest address within a same group to the indoor unit desired to be the main unit.

Set to the main unit address within a same group in serial order.

[Main unit +1, +2, +3, .... ]

Set any address after setting all indoor units.

–

Set by the main/sub selector switch.

The lowest address of indoor unit within refrigerant system + 50

Main

b. Centralized control transmission line

Apply jumper wiring between M1, M2 terminals of centralized control transmission line terminal blocks (TB7) on

each OC. On one OC only, replace the power selecting connector (CN41) with (CN40). Set the centralized control

switch (SW2-1) on the main board of all outdoor units to “ON.”

❉ Make sure to use shielded wire.

Connection of shielded wire:

Apply jumper wiring to connect the shielded earth to S-terminal of the terminal block (TB7) on each OC. Connect S-

terminal of the terminal block (TB7) on one OC with (CN40) connected to the earth screw ( ) of the electrical

parts box.

51 ~ 100

Hex. unit

Comp. unit

5 Sub unit OS Oundoor unit address + 1

Page 31

- 29 -

TB5 TB

A1 B2

TB5

TB5 TB

0403

TB5

A1 B2

L3 L4

L23 L24

L22

a. Indoor/outdoor transmission line

Farthest length (1.25mm2 or more) L2 + L3 + L4 200m L22 + L23 + L24 200m L25 200m

b. Centralized control transmission line

Farthest length via outdoor unit (1.25mm2 or more) L25 + L31 + L2 + L3 + L4 500m L2 + L3 + L4 + L31 + L22 + L23 + L24 500m

c. MA remote controller wiring

The same as 1. (1)

Control wiring example

Group

Prohibited items Allowable length

1. M-NET and MA remote controllers can not be connected together to the indoor unit within the same group.

2. MA remote controller of 3 units or more can not be connected to the indoor unit within the same group.

3. Do not connect together the terminal blocks (TB5) of the indoor unit connected to different outdoor units.

4. Replacement of the power supply selecting connector (CN41) on the outdoor unit should be done only on one outdoor unit.

5. Grounding work is required for S-terminal of the centralized control transmission block (TB7) on one outdoor unit only.

6. The system controller connectable to the indoor/outdoor transmission line counts for 3 sets maximum. While G-50 counts for only 1 set

7. When the total number of indoor units exceeds 26 sets, th e system controller may not be connected to the indoor/outdoor transmission line.

8. When the total number indoor units exceed 18 sets and they includes Type 200 or above, the system controller may not

be connected to the indoor/outdoor transmission line.

Interlocking with ventilation

– Example to use shielded wire –

Group

Note 1. LM adaptor may not be connected to indoor/outdoor transmission line.

≤

CN41→CN40 Replace SW2-1 OFF→ON

Leave CN41 as it is. SW2-1 OFF→ON

M1M2

TB3

TB7

(52)

TB3

TB7

(54)

L31

Connect

System controller

Note 1

L25

TB3

M1M2

M1M2 M1M2

M1M2

M1M2 M1M2

M1M2

1. System using MA remote controller

(5) In the case of connecting system controller to indoor/outdoor transmission line (excluding LM adaptor)

Page 32

- 30 -

Wiring method • Address setting method

a. Indoor/outdoor transmission line

Apply jumper wiring connection between M1, M2 terminals of the indoor/outdoor transmission line terminal block

(TB3) on the outdoor unit (OC) and that of indoor/outdoor transmission line terminal block (TB5) on each indoor

unit (IC). (with non-polarity two wires)

❉ Make sure to use shielded wire.

Connection of shielded wire:

For the grounding of shielded wire, apply jumper wiring between the grounding screw of OC, S-terminal of the

terminal block (TB3), and S-terminal of the system controller.

b. Centralized control transmission line

Apply jumper wiring between M1, M2 terminals of centralized control transmission line terminal blocks (TB7) on

each OC. On one OC only, replace the power selecting connector (CN41) with (CN40). Set the centralized control

switch (SW2-1) on the main board of all outdoor units to “ON.”

❉ Make sure to use shielded wire.

Connection of shielded wire:

Apply jumper wiring to connect the shielded earth to S-terminal of the terminal block (TB7) on each OC. Connect S-

terminal of the terminal block (TB7) on one OC with (CN40) connected to the earth screw ( ) of the electrical

parts box.

c. MA remote controller wiring

The same as 1. (1)

For 2-remote controller operation:

The same as 1. (1)

For indoor unit group operation:

The same as 1. (2)

d. LOSSNAY connection

Apply jumper wiring to connect A, B terminals of the terminal block (TB5) on (IC) to the terminal block (TB5) on the

indoor/outdoor transmission line terminal block (TB5) on Lossnay (LC). (with non-polarity two wires)

❉ The interlocking registration of the indoor unit and Lossnay is required from the system controller. (For the

registration method, see the instruction manual of system controller.)

To connect ON/OFF remote controller only, interlocking registration from the remote controller is required.

e. Switch setting

Address setting is required as follows.

1 Indoor unit

2 LOSSNAY

MA remote controller

4 Outdoor unit

Main unit

Sub unit

Main unit

Sub unit

01 ~ 50

Not required

Sub unit

• Set the address not to be overlapped with the indoor unit address.

• Conduct initial setting by the system controller with the same setting detail of indoor unit applied in MA remote controller wiring.

• When setting address to “100,” make it “50.”

Order

Unit or controller

Address

Setting method Caution

Factory

setting range

setting

• Set the lowest address within a same group to the indoor unit desired to be the main unit.

Set to the main unit address within a same group in serial order. [Main unit +1, +2, +3,]

Set any address after setting all indoor units.

–

Set by the main/sub selector switch

The lowest address of indoor unit within refrigerant system + 50

Main

51 ~ 100

Hex. unit

Comp. unit

5 Sub unit OS Oundoor unit address + 1

Page 33

- 31 -

TB5 TB

101

103

102

TB5 TB

A1 B2

TB5

TB5 TB

0403

TB5

A1 B2

L3 L4

L23 L24

L22

Control wiring example

Group

Prohibited items Allowable length

Interlocking with ventilation

– Example to use shielded wire –

Group

Note 1: If only the LM adaptor is connected, leave SW2-1 to OFF. Note 2: LM adaptor requires single phase AC 230 V.

1. A group of indoor units cannot be connected to both M-NET remote controller and MA remote controllers.

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

3. Do not connect the TB5’s (Terminal block) of the indoor units that are connected to different outdoor units.

4. Replace CN41 (power supply switch connector on outdoor units) on only one of the outdoor units.

5. Ground the S terminal of TB7 on only one of the outdoor units.

6. Transmission line booster is necessary when the total number of connected indoor units exceeds 20 (19 with 1 BC and 18 with 1 BC and BS each).

7. Transmission line booster is necessary if the system includes indoor units of 200 or higher and the total number of indoor units exceeds 16 (15 with 1 BC and 14 with 1 BC and BS each).

a. Indoor/outdoor transmission line

b. Centralized control transmission line

c. M-NET remote controller wiring

CN41→CN40 Replace SW2-1 OFF→

Note 1

Leave CN41 as it is. SW2-1 OFF→ON

The same as 2. (1)

The same as 1. (4)

The same as 1. (3)

M1M2

TB3

TB7

(52)

TB3

TB7

(54)

System controller

L31

L32

Note 2

TB3

Note 1

Connect

M1M2 M1M2

M1M2

M1M2 M1M2

M1M2

2. System Using the M-NET Remote Controller

(1) System with the system controller connected to the transmission lines for centralized control

Page 34

- 32 -

a. Indoor/outdoor transmission line

Connection of shielded wire:

b. Centralized control transmission line

c. M-NET remote controller wiring

The same as 1. (3)

For 2-remote controller operation:

The same as 1. (1)

Connection of shielded wire:

The same as 1. (4)

For a 2-remote-controller operation, connect each of the terminals M1 and M2 of the IC terminal block to the two RC

terminal blocks respectively.

Indoor unit group operation

To operate IC

’s as a group, connect the M1, M2 terminals of the terminal block on the main IC in the group with the

RC terminal block (with non-polar two wires)

❉M-NET remote controller can be connected at any point on the indoor/outdoor transmission line.

❉To run a group operation of indoor units that have different functions, select the unit with the greatest number

of functions as the main unit.

The same as 1. (4)

For indoor unit group operation:

d. LOSSNAY connection

M-NET remote controller wiring

Connect each of the M1 and M2 terminals of TB5 (indoor/outdoor transmission line terminal block) on the IC to the

terminals on the M-NET remote controller.

e. Switch setting

Address setting is required as follows.

1 Indoor unit

2 LOSSNAY

M-NET remote controller

4 Outdoor unit

Main unit

Sub unit

Main unit

Sub unit

01 ~ 50

51 ~ 100

101 ~ 150

151 ~ 200

Order

Unit or controller

Address

Setting method Caution

Factory

setting range

setting

101

Starting with the number main unit address +1, assign a sequential number to each of the rest of the indoor units.

After all indoor units have received an address, use any remaining number and assign it to the Lossnay unit. units.

The smallest indoor unit address in the same refrigerant system +50

The address of the main unit in the same group +100

The address of the main unit in the same group +150

• Assign the smallest address within the group to the indoor unit to become the main unit.

• Make the initial setting of the indoor unit group setting with the system controller (MELANS).

• The Lossnay address must not overlap with the indoor unit address.

• 100

’s digit does not need to be

set.

• Set the address to “ 00 ” when setting it to “ 200 ”.

• Set the address to “ 50 ” when setting it to “ 100 ”.

Wiring method • Address setting method

Comp. unit

Hex. unit5 Sub unit OS

Oundoor unit address + 1

Page 35

- 33 -

TB5 TB

104

TB5 TB

A1 B2

TB5

TB5 TB

0503

L22

L3 L4

L23 L24

105

A1 B2

a. Indoor/outdoor transmission line

The same as 1. (3)

b. Centralized control transmission line

The same as 1. (4)

c-1. MA remote controller wiring

The same as 1. (1)

c-2. M-net remote controller wiring

The same as 2. (1)

Control wiring example

Group

Prohibited items Allowable length

1. Make sure to connect the system controller.

2. M-NET and MA remote controllers can not be connected together to the indoor unit within a same group.

3. M-NET remote controller of 3 units or more can not be connected to the indoor unit within a same group.

8. When the total number of indoor units exceeds 20 sets, transmission line booster is required.

9. When the total number of indoor units exceed 16 sets and they include Type 200 or above, the transmission line booster is required.

– Example to use shielded wire –

Group

Notes:

1. Leave SW2-1 as “OFF” when connecting LM adapter only.

2. LM adapter requires the power source of 1-phase AC 230V.

Group

Replacement of the power supply selecting connector (CN41) on the outdoor unit should be done only on one outdoor unit. Grounding work is required for S-terminal of the centralized control transmission block (TB7) on one outdoor unit only.

4. MA remote controller of 3 units or more can not be connected to the indoor unit within a same group.

5. Do not connect together the terminal blocks (TB5) of the indoor unit connected to different outdoor units.

M1M2

TB3

TB7

(52)

TB3

TB7

(54)

System controller

L31

L32

Note 2

TB3

M1M2 M1M2

M1M2

M1M2 M1M2

M1M2

Connect

Note 1

CN41→CN40 Replace SW2-1 OFF→ON

Note 1

Leave CN41 as it is. SW2-1 OFF→ON

3. System where MA remote controller and M-NET remote controller coexist

Page 36

- 34 -

Indoor unit

MA remote controller

Indoor unit

M-NET remote controller

Wiring method • Address setting method

a. Indoor/outdoor transmission line

The same as 1. (3)

Connection of shielded wire:

The same as 1. (1)

b. Centralized control transmission line

The same as 1. (4)

Connection of shielded wire:

The same as 1. (4)

c-1. MA remote controller wiring, For 2-remote controller operation: , For indoor unit group operation:

The same as 1. (1)

c-2. M-NET remote controller, For 2-remote controller operation: , For indoor unit group operation:

The same as 2. (1)

d. Lossnay connection

The same as 1. (4)

e. Switch setting

Address setting is required as follows.

Operation with MA remote controller

Operation with M-NET remote ontroller

Lossnay

Outdoor unit

01 ~ 50

Not

required

Sub remote

controller

01 ~ 50

101 ~ 150

151 ~ 200

01 ~ 50

51 ~ 100

• Set lower address than that of the indoor unit connected to M-NET remote controller.

• Initially set the same setting detail as that of indoor unit group executed in the wiring of MA remote controller with system controller.

• Initially set the same setting detail as that of indoor unit group with system controller.

• 100 digits are not required to set.

• When setting the address as “200,” make it “00.”

• Set so that not duplicating with

the indoor unit addresses.

• When setting address to “100,” make it “50.”

Order

Unit or controller

Address

Setting method Caution

Factory

setting range

setting

• Set the lowest address within a same group to the indoor unit desired to be the main unit.

Set to the main unit address within a same group in serial order. [Main unit +1, +2, +3,]

–

Set by using the main/sub selector switch

• After setting the address of the indoor unit to be operated with MA controller, set the lowest address among the same group to the indoor unit desired to be the main unit.

Set to the main unit address within a same group in serial order. [Main unit +1, +2, +3,]

Main unit address inside a same group + 100

Main unit address inside a same group + 150

After setting all indoor units, set any address.

The lowest address of indoor unit within refrigerant system + 50

Main

101

Main unit

Sub unit

Main unit

Sub unit

Main unit

Sub unit

Main unit

Sub uni

Hex. unit

Comp. unit

Sub unit OS Oundoor unit address + 15

Page 37

- 35 -

H1(

Upper Comp. unit)

1’

(

Lower Comp. unit)

BCD

23 4

1. Line branching system

For the piping connection, the end branching system is applied where the end of refrigerant piping from the outdoor unit is branched and connected to each indoor unit. As the piping connection method, the indoor unit is applied with flare connection, outdoor unit gas piping is flange connection, and liquid piping is flare connection. For the branching, brazed connection is applied.

Warning

Be careful not to leak refrigerant gas (R410A) near a fire. Refrigerant gas if touched a fire of gas oven and the like will be decomposed to generate poisonous gas leading to gas-poisoning. Do not conduct welding work in a closed room. Run a gas leak test after completing refrigerant piping work.

Note: The total model names downstream in the table below

represent that viewed from A-point in the above figure.

Comp. unit

Hex. unit

First branch

Indoor

Indoor Indoor Indoor

To downstream unit

Do not use a charging cylinder.

• Using a charging cylinder may cause the refrigerant to deteriorate.

Do not use existing refrigerant piping.

• The old refrigerant and refrigerator oil in the existing piping contains a large amount of chlorine which may cause the refrigerantor oil of the new unit to deteriorate.

Store the piping to be used during installation indoors and keep both ends of the piping sealed until just before brazing. (Store elbows and other joints in a plastic bag.)

• If dust, dirt, or water enters the refrigerant cycle, deterioration of the oil and compressor trouble may result.

Caution

Do not use a refrigerant other than that indicated on the equipment at installation or movement.

• Mixing of different refrigerant or air makes the refrigeration cycle abnormal causing breakage and the like.

Warning

Caution

Indoor

Use refrigerant piping phosphorus deoxidized copper. In addition, be sure that the inner and outer surface of the pipes are clean and free of hazardous sulphur, oxides, dust/dirt, shaving particles, oils, moisture, or any other contaminant.

• Contaminants on the inside of the refrigerant piping may cause the refrigerant residual oil to deteriorate.

Caution

Use liquid refrigerant to fill the system.

• If gas refrigerant is used to seal the system, the composition of the refrigerant in the cylinder will change and performance may drop.

Item Piping section Allowable value

Total piping length A + B + C + D + a + b + c + d +e Less than 300m

Length

Farthest piping length (L) A + B + C + D + e

Farthest piping length after first branch ( )

Comp. unit – Hex. unit

B + C + D + e Less than 40m

Upper Comp. unit H1 Less than 50m

Indoor –

Comp. unit

Lower Comp. unit H1’ Less than 40m

Indoor – Indoor h

Comp. unit – Hex. unit H2

Less than 15m

Less than 0.1m

Less than 150m

(Equivalent length:less than 175m)

Less than 10m

(Equivalent length:less than 12m)

Height difference

[4] Restrictions on Refrigerant Piping Length

Page 38

- 36 -

Fan guard

Heat exchanger

Fan guard

Heat exchanger

££

Components of the Outdoor Unit

[1] Appearance of the Components and Refrigerant Circuit

< Compressor unit >

[ Front view of the unit ]

[ Rear view of the unit ]

Page 39

- 37 -

Pressure switch (63H1)

Accumulator

Inverter compressor

(No.1)

Oil balance tube

Inverter compressor

(No.2)

Pressure switch (63H2)

Check joint

(CJ3)

Oil separator (No.1)

Oil separator (No.2)

Check joint

(CJ4)

Low-pressure check joint

High-pressure check joint

2-way valve (SV5c)

Check valve (CV3)

Liquid-side ball valve (connected to indoor unit)

Gas-side ball valve (connected to indoor unit)

Gas-side ball valve (connected to Hex. unit)

Drier

4-way valve (21S4b)

High-pressure pressure sensor (63HS)

2-way valve (SV5b)

4-way valve (21S4a)

Low-pressure pressure sensor (63LS)

4-way valve (21S4c)

Liquid-side ball valve (connected to Hex. unit)

< Compressor unit >

[ Front view of the refrigerant circuit – Right ]

[ Rear view of the refrigerant circuit – Left ]

Page 40

- 38 -

Accumulator

Oil tank

Linear expansion valve (LEV1)

4-way valve (21S4a)

4-way valve (21S4b)

4-way valve (21S4c)

Sub cool coil

Accumulator

< Compressor unit >

[ Front view of the unit – Right ]

[ Rear view of the unit – Left ]

Page 41

- 39 -

Fan guard

Heat exchanger

Fan guard

Heat exchanger

< Heat exchanger unit >

[ Front view of the unit ]

[ Rear view of the unit ]

Page 42

- 40 -

Liquid pipe (connected to Comp. unit)

Control box

Thermistor (TH5b)

Heat exchanger

Gas pipe (connected to Comp. unit)

< Heat exchanger unit >

[ Refrigerant circuit ]

Page 43

- 41 -

No.1 INV board

No.2 INV board Main board

Power supply terminal block (TB1)

Indoor/outdoor transmission terminal block (TB3)

Transmission line terminal block for centralized control (TB7)

Relay board

Smoothing capacitor

(C11, C12)

Resistor (R13, R14)

Resistor (R23, R24)

Gate amp board2 (G/A board)

Gate amp board1 (G/A board)

Electromagnetic contactor (52C2)

Electromagnetic contactor (52C1)

Noise filter (ACNF1)

Rush current protection resistor (R11, R12)

Noise filter (ACNF2)

Diode stack (DS2)

Smoothing capacitor (C21, C22)

Rush current protection resistor (R21, R22)

Diode stack (DS1)

FAN board

[2] Control Box

< Compresser unit >

[ Appearance ]

[ Under the circuit board cover ]

Page 44

DCL2

DCL1

Choke coil (L1,L2)

Transformer

Filter board

- 42 -

[ Rear view of the control box ]

[ Rear view of the circuit board cover ]

Page 45

- 43 -

Smoothing capacitor (C1, C2)

Resistor (R2, R3)

Electromagnetic contactor (52F)

Transformer for FAN board (T02)

Noise filter (NF)

Diode stack (DS)

Rush current protection resistor (R1)

FAN board DCL Control board

Transformer for control board (T01)

Power supply terminal block (TB1)

Indoor/outdoor transmission terminal block (TB3)

< Heat exchanger unit >

Page 46

- 44 -

CNVCC1 Controlled source input

1–2

DC30V

1–3

DC30V

4–5

DC7V

4–6

DC12V

7–8

DC7V

CNRS3BLD2

CNAC3 Power output

CN20 Power intput

CN21 Power intput

LD1 Service LED

SW5 SW4 SW3 SW2

SWU2 SWU1

SW1

CNLVB

CN3S

CN3D

CN3N

CNRS3A CNS1 CNS2 CN40 CN41

CNRT1

CNOUT1

CN52C Control for 52C1

CN51

3–4

Compressor ON/OFF

3–5

Trouble

CN38

[3] Circuit Board

1. Main board

Page 47

- 45 -

CNVCC1 Power supply

1–2

DC30V

1–3

DC30V

4–5

DC7V

4–6

DC12V

7–8

DC7V

CN15V2 Power supply for IPM control

F02CNVDC

SW1

SW2

CN52C

CNFAN CNRS1 CNRS2

Serial transmission for MAIN board

CNCT2

CNAC2 Power Source

CNTH

CNCT

CNDR2

2. INV board

Page 48

- 46 -

4. Relay board

CNVDC DC bus voltage input

1–3

LED1

LED2

SW2

CNTRIPM (back)

CNINV Fan motor output Fuse CNRS2

3. FAN board

CN01 CH12 output

3–5

AC220~240V

CNAC1 CH12 power input

1–3

AC220~240V

CNIN relay driving input

CNX10

Page 49

- 47 -

CNFG CNL2CNL1

CNOUT Controlled source output

CNIN Controlled source input

5. Filter board

CNDR1

CN15V1

CNDC1 CNDC2

CNIPM1

6. G/A board

Page 50

CN3T Power input

CN2M for M-NET transmission

CND Power input (AC220~240V)

1 L1 phase 3 N phase

Address switch

CN29 TH5b Piping temperature

Heat exchanger unit No. switch

Dipswitch

CNT Primary transformer

1–3 AC220~240V

CNP 52F output

–3 AC220~240V

LED2 Service LED

LED1 lit during power reception

CN30,CN21,CN7V Serial communication input from and output to FAN board

- 48 -

7. Controller board (heat exchanger unit)

Page 51

- 49 -

Function/specification

Remote controller address setting

Not required Required

Indoor/outdoor unit address setting

Not required (applicable only in the case of single refrigerant systems)(Note 3)

Required

Wiring method Non-polar 2 wires

✻

Daisy-chain the indoor units with non-polar 2 wires when running a group operation.

Non-polar 2 wires

Installation location of remote controller

Connectable to any indoor unit in the group

Connectible at any point on the indoor/outdoor transmission line

Interlocking with the ventilation unit

Each indoor unit can individually be interlocked with a ventilation unit. (Registered on the remote controller in the same group)

Each indoor unit can individually be interlocked with a ventilation unit. (Registered on the remote controller)

Making group changes

(Note 1) MA remote controller includes MA remote controllers, MA compact remote controllers, and wireless remote controllers. (Note 2) M-NET remote controller includes ME remote controllers and compact remote controllers. (Note 3) Depending on the system configuration, even a single refrigerant system may require an address setting. (Note 4) Either an MA remote controller or an M-NET remote controller can be connected to a group of multiple-refrigerant systems

or when a system controller is connected.

(Note 1) M-NET remote controllers and MA remote controllers cannot both be connected to the same group of indoor units. (Note 2) A system controller must be connected to a system that has both MA remote controllers and M-NET remote controllers.

MA remote controller wires between indoor units require rewiring.

Indoor unit and remote controller addresses must be changed, or the registration information must be changed using MELANS.

M-NET(ME)Remote Controller (Notes 2, 4)MA remote controller (Notes 1, 4)

MA remote controller (Notes 1, 2)

< A system using an MA remote controller > < System using an M-NET remote controller >

• Low chances of system expansion and grouping changes are expected.

• Grouping (floor plan) has been decided at the time of installation.

• High chances of centralized installation of remote controllers, system expansion, and grouping changes.

• Grouping (floor plan) has not been decided at the time of installation.

• Direct connection of the remote controller to the Lossnay inside the heater-humidifier.

M-NET (ME) remote controller (Notes 1, 2)

MA remote controller

Outdoor unit

Indoor unit M-NET remote controller

Outdoor unit

Indoor unit

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

GroupGroup GroupGroup

¢¢

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 of MA and ME Remote Controllers

2. Selecting the Best Type of Remote Controller

Select either the MA remote controller or the M-NET remote controller to take full advantage of a given system. The following information is provided as a reference for selection.

Page 52

- 50 -

(A) Group registration

Displaying “GROUP REGISTRATION”.

- Press and hold down the A [FILTER] and B [Louver (

)] buttons at the same time for two seconds. The display shown below appears.

Set the unit address No.

- Press the c [TEMP. (

) and ( )] buttons. The unit address No. decreases and increases. Set it to the indoor unit address No. you want to register.

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

No. being displayed.

- When registration is completed normally, the unit type is displayed as shown below.

- If the specified indoor unit does not exist, an error message will be displayed. Make sure there are indoor units and repeat the operation above.

5 To register multiple indoor units, repeat steps 3 and 4.

(B) Interlock registration

Displaying “INTERLOCK REGISTRATION”

- Press the [Mode selection (

)] button. The

display shown below appears. If the button is pressed again, the display returns to 2 GROUP REGISTRATION .

Displaying address No. of LOSSNAY and any indoor unit address No. you want to interlock.

- Press the C [TEMP. (

) and ( )] buttons. INDOOR UNIT ADDRESS NO. decreases and increases. Set it to the indoor unit address No. you want to interlock.

- Press the HG [Time selection (

) and ( )] buttons. INTERLOCKED UNIT ADDRESS NO. decreases and increases. Set it to the LOSSNAY address No. you want to interlock.

- Press the D [TEST] button. The display shown below appears,

and the indoor unit being displayed at INDOOR UNIT ADDRESS and the LOSSNAY being displayed at INTERLOCKED UNIT ADDRESS are interlocked.

- The above can also be registered similarly by displaying the LOSSNAY address at INDOOR UNIT ADDRESS and the indoor unit address at INTERLOCKED UNIT ADDRESS .

NOTE:

INDOOR UNIT ADDRESS and INTERLOCKED UNIT ADDRESS

are displayed at the same time

To confirm the addresses, go to (2) Registered address confirmation .

Displays the unit type. (Indoor unit in this case.)

“ ” will flash as a registration error. (If the registered indoor unit does not exist)

If registration is completed normally, the display alternates as shown in the figure at the left. If a registration error occurs,

will flash. (Indicates that the

unit does not exist.)

INDOOR UNIT ADDRESS

INTERLOCKED

UNIT ADDRESS

PAR-F27MEA

TIMER SET

ON/OFF

FILTER

CHECK TEST

TEMP.

CLOCK ON OFF

To confirm the addresses, go to (2) Registered address confirmation .

(Alternate display)

This operation should be performed to set a group of indoor units between different refrigerant systems and to manually raise the indoor/outdoor unit addresses.

(A) Group setting ........... To register the indoor units you want to control with the remote

controller, confirm the registered units, or delete registered units.

(B) Interlock setting........ To register the LOSSNAY to be interlocked with indoor units, con-

firm the registered units, or delete registered units.

[ H0 flashing display] [OFF display]

[Setting Procedure]

(1) Address registration

Display “H0”, which flashes when the power is on, or OFF using the [ON/OFF] button.

The liquid crystal displays are shown below. If any of these displays is different, the next set cannot be performed.

C G

F A

“

”

“

”

“

”

“

”

“

””

“

”

“

”

“

”“

”

“

· Interlock all the units in a group with the LOSSNAY. If not

interlocked, the LOSSNAY will not operate.

· If an SC is connected, make an interlocking setting with the SC.

[2] Group Setting and Interlocking Settings that are Made on the ME Remote Controller

1. Group setting/interlocking setting

Page 53

- 51 -

(B) Interlocked registration information confirmation After performing step 6, proceed as follows:

Display the indoor unit address No. you want to confirm.

- Press the H [Time selection (

) and ( )] buttons. The interlocked unit address decreases and increases. Set it to the indoor unit address No. you want to confirm.

Displaying the LOSSNAY address No. interlocked at step .

- Press the E [Timer selection (

)] button. The interlocked LOSSNAY address No. and indoor unit address No. are alternately displayed.

D Displaying another registered unit address No.

- After step C, press the E [Timer selection (

)] button again. Another registered unit address No. is displayed. (The display method is the same as step C.)

(C)Returning to the normal state When all the group registration and interlock registration operations

are completed, return to the normal state as described below.

Press and hold down the [FILTER] and B [Louver

(

)] buttons at the same time for two seconds. The re-

mote controller returns to the state of 1.

(2) Registered address confirmation

Display the indoor unit address No. registered in the remote controller by performing steps 1 and 2.

Repeat steps 79 and 8 above to interlock all the indoor units in a group with the LOSSNAY.

To return to the normal state, go to step 0.

To confirm the addresses, go to (2) Registered address confirmation .

(A) Group registration information confirmation

A Displaying “GROUP REGISTRATION”

- Each time you press the E [Timer selection (

)] button, the

registered indoor unit address No. and unit type are displayed.

- When there is one registration, one address No. is displayed no matter how many times the button is pressed.

- When there are multiple registrations (ex: 011 , 012 , 013 , the address Nos.) are displayed in 011 012 013 order each time the E [Timer selection (

)] button is pressed.

Indicates the unit type. (Indoor unit in this case.)

The above can also be confirmed similarly by displaying the LOSSNAY address at the interlocked unit address.

Address of unit that is interlocked

To delete an address, go to

(3) Address deletion

”.

To return to the normal state, go to step 0.

(Alternate display)

Address of another registered unit

(Alternate display)

To delete an address, go to

(3) Address deletion .

(3) Address deletion

Group registration information deletion deletes the indoor units registered in the remote controller. Interlocked registration information deletion deletes the interlock between units. Both deletion operations perform the address confirmation processing of (2) and are performed in the state in which the unit you want to delete was displayed.

Deleting registered indoor unit or interlock between units.

- Press the F [Time selection(

CLOCK ON OFF

)] button two times in succession. The displayed indoor unit address or the interlock between units is deleted. When the information is deleted, the display shown below appears.

”

“

”

“

”

“

→→

”

“

→→

”

Page 54

- 52 -

(A) Deleting group registration information

- If there is a transmission error, registration is not deleted and

the display shown below appears. In this case, repeat the operations above.

When deletion was completed normally,

is displayed at the unit type display. If a deletion error occurred,

is displayed at the unit type display. In this case, repeat the operations described above.

(B) When deleting interlocked registration

is displayed at the room temperature display.

To return to the normal state, go to step 0.

(Alternate display)

(4) (A) Group registration and (B) Interlock registration of another group using an arbitrary remote controller

(A) Group registration and (B) Interlock registration of another group can be performed using an arbitrary remote controller. For a description of the operation procedure, see (B) Interlock registration of section [2] 1. Group setting/interlocking setting. Set the address No. as shown below.

(A) When performing group registration

Interlocked unit address ... Remote controller address No.

Indoor unit address ........... Indoor unit address No. you want to control with the remote controller

(B) When performing interlock registration

Interlocked unit address ... LOSSNAY address No.

Indoor unit address ........... Indoor unit address No. which is interlocked with LOSSNAY

”

“

”

“

”

“

”

“

”

“

2. Remote controller functions selection

In the remote controller function selection mode, three functions can be selected and changed. Select and change these functions, as required. For the operating instructions refer to (6) How to select the remote controller functions of 3 How to Operate in Instruction Book.

(A) Operation mode display selection mode (

AUTO mode heating/cooling display selection) When the AUTO mode was selected with the remote controller, the indoor unit is judged from the room temperature and heating or cooling is performed automatically. In this case, AUTO COOLING or AUTO HEATING is displayed at the remote controller. However, only AUTO without

COOLING or HEATING can also be displayed.

(B) Room temperature display selection mode (

Room temperature display/no display selection)

Normally, the intake air temperature is displayed at the remote controller. However, no display can also be selected.

(C)

Set temperature range limit mode Ordinarily, the set temperature can be freely set over the 19

˚C to 30˚C range for cooling and dry and the 17 ˚C to 28˚C range for heating. However, for cooling and dry, the lower limit temperature and for heating, the upper limit temperature can be limited to a preset temperature. If the set temperature range is made higher for cooling and dry and is set lower for heating by this method, excessive cooling and heating can be prevented and energy can be saved.

CAUTION

When the normal set temperature adjustment range was changed using a remote controller connected to a simultaneous cooling/heating air condition with an AUTO mode, the AUTO mode cannot be selected with the [Mode selection] button.

”

“

””””

“

”

“

“ “ “

”

“

”

“

”

“

”

“

PAR-F27MEA

ON/OFF

FILTER

CHECK TEST

TEMP.

TIMER SET

CLOCK ON OFF

[Remote controller function selection mode transition]

[Remote controller OFF window display]

2 3

:Press and hold down the [CHECK] and

[Mode selection] buttons at the same time for 2 seconds

:[TEMP.

( )]

button

:[TEMP.

( )]

button

OFF window

Operation mode display selection mode

Room temperature display selection mode

Set temperature adjustment range limit mode (cool/dry)

Set temperature adjustment range limit mode (heat)

Remote controller function selection modes

→

Page 55

- 53 -

˚C

LIMIT TEMP.

˚C

LIMIT TEMP.

[Time selection ( ) (( ))] button

[PROCEDURE]

1. Set the air conditioner to the off state with the remote controller [ON/OFF] button. The remote controller display shifts to the OFF window display shown at the left.

2. When the [CHECK] and [Mode selection] buttons 1 are pressed and held down at the same time for two seconds, the remote controller switches to the remote controller function selection mode and the “OPERATION MODE DISPLAY SELECTION MODE” window appears. The other three modes

can be selected by operating the [TEMP.] ( ) button 23 or ( ) button . Display the mode whose function you want to change.

OPERATION MODE DISPLAY SELECTION MODE (When you want to change the AUTO mode display)

•“AUTO” “COOL/HEAT” flashes and “ON” or “OFF” lights. Each time the [Time selection ( ) or ( )] button 4 is pressed in this state, the “ON” and

“OFF” display is switched.

• When “ON” was selected, “AUTO” “COOL” or “AUTO” “HEAT” is displayed during AUTO mode operation.

• When “OFF” was selected, only “AUTO ” is displayed during AUTO mode operation.

[When set temperature adjustment range in cool/dry mode is 19 °C to 30 °C]

2) Each time the [Time selection (

) or ( )] button 4 is pressed, the lower limit temperature value is increased or decreased. Set it to the desired

set temperature adjustment range.

ROOM TEMPERATURE DISPLAY SELECTION MODE (When you want to change room temperature display/no display)

•“88 °C” flashes at the room temperature display and “ON” or “OFF” lights. Each time the [Time selection ( ) or ( )] button 4 is pressed in this state, the “ON” and “OFF” display is switched.

• When “ON” was selected, the room temperature is continuously displayed in the ON window.

• When “OFF” was selected, the room temperature is not displayed in the ON window.

SET TEMPERATURE RANGE LIMIT MODE (When you want to change the set temperature adjustment range)

1) Cool/dry mode temperature selection

“COOL/DRY” and “LIMIT TEMP.” light on the display and the set temperature adjustment range in the cool (dry) mode is displayed. The lower limit temperature of the set temperature display flashes. This temperature value can be set and changed.

[Lower limit temperature adjustment range]: 19 °C

30 °C (Upper limit temperature 30°C is fixed. Only the lower limit temperature

can be changed.)

[When set temperature adjustment range was set to 24 °C to 30 °C]

3) When the [TEMP. (

)] button 2 is pressed after the setting above, the remote controller switches to the heat mode temperature selection window. “HEAT” and “LIMIT TEMP.” light on the display and the heat mode set temperature adjustment range is displayed. The upper limit temperature value can be changed by pressing the [Time selection (

) or ( )] button 4, the same as cool/dry mode temperature selection. Upper limit temperature adjustment range: 17 °C to 28 °C (The lower limit temperature 17°C is fixed. Only the upper limit temperature can be changed.)

3. At the end of selection of each function, release the remote controller function selection mode and display the OFF window by pressing the [CHECK] and [Mode selection] buttons 1 at the same time for two seconds.

Perform this operation when you want to register the LOSSNAY, confirm the registered units, or delete the registered units controlled by the remote controller. The following uses indoor unit address 05 and LOSSNAY address 30 as an example to describe the setting procedure.

[Setting Procedure] 1 Stop the air conditioner using the remote controller A [ON/OFF] button.

If the OFF display shown below does not appear at this time, step 2 cannot be performed.

2 Press and hold down the [FILTER] and cB [Louver] buttons at the same time for two

seconds. The display shown below appears. The remote controller confirms the registered LOSSNAY addresses of the currently connected indoor units.

Make this setting only when interlocked operation with LOSSNAY is necessary with CITY MULTI models.) (This setting cannot be made with Mr. SLIM air conditioners.)

TIMER SET

PAR-20MAA

ON/OFF

FILTER

CHECK TEST

TEMP.

FUNCTION

[3] Interlocking Setting that is Made on the MA Remote Controller

Lossnay interlocking setting

˚C

FUNCTION

Page 56

- 54 -

3 Registration confirmation result

- The indoor unit address and registered LOSSNAY address are displayed alternately.

- When LOSSNAY are not registered

4 If registration is unnecessary, end registration by pressing and holding down the B [FILTER] and c [Louver] buttons at the same time for two

seconds. If a new LOSSNAY must be registered, go to step 1. Registration procedure. If you want to confirm another LOSSNAY, go to step 2. Confirmation

procedure. To delete a registered LOSSNAY, go to step 3. Deletion procedure.

< 1. Registration procedure >

Set the address of the LOSSNAY and the indoor unit connected by the remote controller you want to register using the D [TEMP. (

) and ( )]

buttons. (01 to 50) Set the address of the LOSSNAY you want to register using the E [TIMER SET (

) and ( )] buttons. (01 to 50)

Press the F [TEST] button, and register the set indoor unit address and LOSSNAY address.

- Registration end display The indoor unit address and “IC” and LOSSNAY address and “LC” are alternately displayed.

- Registration error display If the address was not correctly registered, the indoor unit address and registered LOSSNAY address are alternately displayed.

Cannot be registered because the registered indoor unit or LOSSNAY does not exist. Cannot be registered because another LOSSNAY was registered at the registered indoor unit.

< 2. Confirmation procedure >

Set the address of the indoor unit connected by the remote controller whose LOSSNAY you want to confirm using the D [TEMP.]

( ) and ( )

buttons. (01 to 50)

Press the G [Timer selection] button and confirm the LOSSNAY address registered at the set indoor unit address.

- Confirmation end display (When LOSSNAY is connected.) The indoor unit address and “IC” and registered LOSSNAY address and “LC” are alternately displayed.

FUNCTION

Indoor unit address LOSSNAY address

FUNCTION

FUNCTION

- Confirmation end display (When LOSSNAY is not connected.) Registered indoor unit address does not exist.

FUNCTION

FUNCTION FUNCTION

< 3. Deletion procedure >

Use this procedure when you want to delete registration of indoor units connected by the remote controller and LOSSNAY.

0 Confirm (see 2. Confirmation procedure) the LOSSNAY you want to delete and display the indoor units and LOSSNAY confirmation results.

A Press the H [TIMER SET] button twice and delete registration of the LOSSNAY registered at the set indoor unit.

- Deletion end display Indoor unit address and “– –” and registered LOSSNAY address and “– –” are alternately displayed.

- Deletion error display When deletion was not performed properly.

[4] Switching to the built-in Thermo on the remote controller

1. Selecting the position of temperature detection by the indoor unit (Factory setting: SW1-1 “OFF” )

To use the built-in sensor in the remote controller, set the SW1-1 on the indoor unit to ON. ✻ Some remote controllers are not equipped with a built-in sensor. Use the built-in sensor on the indoor unit

instead.

✻ When using the built-in sensor on the remote controller, install the remote controller where room tempera-

ture can be detected.

FUNCTION

Page 57

- 55 -

CN51

12V

Electronic expansion valve (SC coil)

LEV1

bypass outlet temp.detect

at Sub-cool coil

TH8

DC Current Sensor

DC reactor (Power factor improvement)

Magnetic contactor (Inverter main circuit)

Crank case heater (Compressor)

Solenoid valve

(Discharge-suction bypass)

Thermistor

Discharge pipe temp. detect

Pipe temp.detect (Hex outlet)

OA temp.detect

liquid outlet temp.detect

at Sub-cool coil

Radiator panel temp. detect

High pressure switch

High pressure sensor

Low pressure sensor

Choke coil (Transmission)

Function device

Earth terminal

Z20

L1, L2

63LS

63HS

63H1, 2

THHS1, 2

Comp. shell temp. detectTH10

TH7

TH6

TH5

TH11,12

Solenoid valve

(Heat exchanger capacity control)

SV5b, c

SV1, 3

4-way valve

21S4a, b, c

CH11,12

Fan motor (Radiator panel)

MF1, 2

52C1, 2

DCL1, 2

DCCT1, 2

ACCT1, 2

AC Current Sensor

Symbol Name

< Symbol explanation >

NOTE:The broken lines indicate field wiring.

Auto changeover:OFF

COOL

OPEN

HEAT

SHORT

✻2:Auto changeover (CN3N 1-2P,1-3P)

CN3N 1-2P

CN3N 1-3P

OPEN

SHORT

Auto changeover:ON

Compressor

ON/OFF

SHORTOPEN

OPEN

SHORT

CN3D 1-2P

CN3D 1-3P

100%

75%

OPEN

SHORT

OPEN OFF

✻1:

Function according to switch operation.

(SW4-7,CN3D 1-2P, and CN3D 1-3P)

50%

NIGHT

MODE

CN3D

1-2P

OFF

SW4-7:OFF (Compressor ON/OFF

and NIGHT MODE)

CN3D

1-3P

SW4-7:ON (STEP DEMAND)

)

191

1414

191

shield

or STEP DEMAND

123

(Transfomer)

black

red

Z20

Inverter controller box

1234567

CNRS2

✻2

MC2

Refer to the service handbook

about the switch operations.

F01

250VAC

2A T

F01

250VAC

2A T

blackwhitered

black

red

black

red

black

red

blue

black

white

red

blue

black

white

red

detection

circuit

detection

circuit

detection

circuit

white red

white

black

4 3 2 1

TH12

CN13

2 1

TH10

CN09

green

F02

700VDC

2A T

F02

700VDC

2A T

shield

Fan motor

(Heat exchanger)

1 21 2 3

CNDR2

CN15V2

CNDC2

black

CNRS2

1 2 3 4 5 6 7

CNRS1

CNCT

1 2 3 4

1 2 3 4 5 6 7

THHS1

1 2

CNTH

green

123

432

CNCT2

blue

CNFG

blue

321

CNFAN

CN04

red

MF1

CNAC2

1 2 53 4

CNVCC1

1 2 3 4 5 6 7

CNVCC1

1 2 3 4 5 6 7 8

321

MF2

321

CN52C

yellow

CNRT1

CNOUT1

LD1

12345

1 2 3 4 5

black

CNAC1

black

CNAC2

X10

321

1 2 3 4 5 6

CNIN

3 2 1

X10

yellow

CNX10

1 2 53 4

SV3

21S

R21 R22

C22

C21

R24

R23

123

CNDR1

CNDC1

black

CN15V1

CN34

red

12345

CN3N

blue

321

AUTO CHANGEOVER

HEAT/COOL

210

ACCT-W

ACCT-U

ACCT2

CNCT2

blue

432

ZNR14

C15

CNIN

blue

CNOUT

green

CNL2 CNL1

1 2

L2 L1

1 21 2

CNFG

blue

1234567

123

ACNF1

(Noise Filter)

R12R11

R13

R14

C11

CNTH

green

1 2

THHS2

1 2 3

CNVDC

1 2 3 4

CNDC2

IPM2

1 2 3 4 5 6 7

432

CNAC2

1 2 53 4

1 2 3 4

CNFAN

red

CNCT

CNRS1

X01

X02

1 4

1 6

OFF

1 2 3 4 5 6 7

CNRS2

CNFG

blue

ACCT-U

ACCT1

ACCT-W

CNDC2

black

CNDR1

CN15V2

CNDR2

CNDC1

black

CN15V1

CNDC2

C14

DCCT1

432

blackwhite

DS1

(Diode stack)

1 2 3 4

red

C12

DCL1

52C1

red

black

TB1

(Terminal Block)

LEV1

1 2 3

1 2 3 4 5

F02

250VAC

6.3A T

F01

250VAC

6.3A T

CN21

blue

CN20

CNTYP5

CNH

CNTYP4

CN01 CNL

black

CNTYP1

red

CN02

1 2 31 2 3

R23

63HS

R22

63LS

TH11TH7 TH5TH6

8 7 6 5 4 3 2 1 3 2 1

TH8

3 2 12 1 3 2 12 12 1

123456789

12345

123

CH11

CNS1

blue

CNS2

blue

CN32

CN33

CN35

red

CN36

CN38

green

CN52C

63H1

63H2

X52

X11

X09

X08

X07

X06

X05

X03

X02

X01

yellow

✻1

Unit address setting

Compressor ON/OFF

NIGHT MODE

SNOW

1010

OFFOFF ONOFF ON

OFF OFF ON

1 2 3 4 5 6

321

CNLVB

red

54321

321

CN3D

CNVCC1

CN3S

red

CNAC3

black

1234567

CNRS3A

123

1234567

OFF

Trouble

Compressor ON/OFF

65432

123

CNTR

T01

CNINV

yellow

CN01

Breakers for wiring

Breakers for current leakage

PUHY-P700,750,800YGM-A

75A

INDOOR/

OUTDOOR

TRANSMISSION

LINE

CENTRAL

CONTROLL

TRANSMISSION

LINE

Power source

3N~

380/400/415V

50/60Hz

L1L2L3

red

white

black

blue

(Noise Filter)

ACNF2

(Diode stack)

DS2

L1L2L3

~~~

C25ZNR24

52C2

DCL2

DCCT2

C24

Gate amp board 2

(G/A BOARD)

Gate amp board 1

(G/A BOARD)

Control circuit board

(MAIN BOARD)

UVW

IPM1

UVW

MC1

UVW

Power circuit board 2

(INV BOARD)

Power circuit board 1

(INV BOARD)

Motor

(Compressor)

Motor

(Compressor)

LED1 operation

LED2 error

LED1 operation

LED2 error

SW1 SW2

1 4

1 6

OFF

SW1 SW2

1 4

SW2

TB3

TB7

M2SM1

FILTER

BOARD

FAN control board

(FAN BOARD)

LED1 operation

LED2 error

CH12

RELAY - BOARD

SW1SW2SW3SW4SW5

SWU3

SWU2 SWU1

SV1

∞∞

Electrical Wiring Diagram

[1] Compressor unit

Page 58

- 56 -

SW12(10’s digit) SW11(1’s digit)

SW14SW4 SW7 SW2

1 64151

AC250V 6A

123

CN30

green

CND

red

12345

F901

TB3

CNINV

CN2M

Shield

CN29

black

CN21

321

12345

CNRS2

SW2

Function setting

Hex. unit

number setting

Unit address setting

LED1 Operation

LED2 Error

LED1 380

~415V power supply

LED2

1 2 3 4 5 6 7

CNTR

52F

1 2 3 4 5 6 7

CNVDC

1 2 3

1 2 3 3

1 2

CN3T

CNP

blue

CNT

X01

CN7V

T01

T02

TH5b

THHS5

CNTH

green

1 2

✻1 Dotted lines indicated wiring to be done on site.

TH5b

ZNR4

THHS5

T02

T01

TB1

TB3

R2R1MF

DCL

Symbol Name

52F

Thermistor (piping temperature detection)

Varistor

Noise filter

Earth terminal

Thermistor (heat sink temperature for fan inverter)

Transformer (FAN BOARD)

Transformer (FP02S-RY)

Power supply terminal block

Terminal block for transmission lines (indoor units)

Diode stack

Electrical discharge resistor

Surge current resistor

Fan motor (heat exchanger)

DC reactor

Electro magnetic contactor (fan)

Capacitor

Main capacitor (flat)

TB1

NF R1 DS

ZNR4

black

red

black

red

C5 C1 R2

DCL

52F

RST

red

L1 L1

L2 L2

L3 L3

White

black

Power supply

3 phase 380~415V

50/60Hz

Indoor-outdoor

transmission lines

FAN board

Controller board

(FP02S-RY)

[2] Heat exchanger unit

Page 59

- 57 -

Terminal

block

CN1

DSA1 ZNR1

S.A.B.

M-NET TRANSMISSION

LINE

(OUTDOOR UNIT SIDE)

M-NET TRANSMISSION

LINE

ADDITIONAL INDOOR

UNIT SIDE

Breaker (3A)

Power source

220-240V~/N

50/60Hz

ZNR2

AC250V

2A F

TB1

BOX BODY

S.P.S.

CN2

CN1

BOX BODY

TB3

TB2

CN2

CN4

CN3

C.B.

CN1

( )

M-NET transmission line

(Outdoor unit side)

M-NET transmission line

(Additional indoor unit side)

Surge Absorber

DSA1

Varistor

ZNR1,2

Choke coil(Transmission)

Earth terminal

Noise Filter

Surge absorber board

Switching Power Supply

Circuit board

Fuse

NAMESYMBOL

SYMBOL EXPLANATION

Power source

TB3

TB2

TB1

S.A.B.

S.P.S.

C.B.

[3] Power Dispatching Extension Unit for the Transmission Lines

Page 60

HEX2b

HEX1b

TH5b

BV4

ST17

21S4c 21S4b 21S4a

HEX2a HEX1a

TH5

SV5b

BV5

ST18

SV5c

TH8

TH7

TH6

CV4

ST8LEV1

ST9CP3

SCC

(HIC curcuit)

BV2

ST2

BV1

ST1

CV3

CJ1

63HS

ST5

SV3

CV1

O/S

CV2

O/S

CP1

ST6 SV1

CP2

ST7

TH11

63H1

TH10

TH12

CJ3

63H2

Comp1 Comp2

ST13 ST12 ST11 ST10

CJ4

Acc

CJ2

63LS

Heat exchanger unit

Compressor unit

Drier

Oil

Tank

- 58 -

§§

Refrigerant Circuit

[1] Refrigerant Circuit Diagram

Page 61

Name Notes Function Specification Check method

Symbol

(function)

273+t

Compressor

High

-pressure sensor

Pressure switch

Thermistor

MC1 MC2

63HS

120=7.465kΩ

R25/120=4057 Rt =

7.465exp{4057( - )}

Resistance value check

393

273+t

R0=15kΩ R0/80=3460 Rt = 15exp{3460( - )}

273

Pressure 0~4.15MPa Vout 0.5~3.5V

0.071V/0.098MPa Pressure [MPa] =1.38✕Vout[V]-0.69

Gnd (Black) Vout (White) Vcc (DC5V) (red)

Connector

63HS

123

2 3

Adjusts the volume of circulating refrigerant by controlling the operating frequency with the operating pressure.

Low-pressure shell scroll type Winding resistance

20˚C : 0.583Ω

63H1 63H2

TH11, 12 (Discharge)

TH5 (Piping temperature)

TH6 (Outdoor air temperature)

TH10 (Compressor shell temperature)

THHS Inverter heat sink temperature

Heat sink

1 Detects high pressure 2 Protects high pressure

1 Controls frequency 2 Controls defrost during heating

operation

3 Controls LEV1 by detecting sub

cool at the heat exchanger outlet, using HPS data and TH5 reading.

1 Detects discharge temperature 2 Protects high pressure

1 Detects outdoor temperature 2 Controls fan operation

Detects the compressor shell temperature.

TH7 TH8

Controls LEV1, using TH5, TH7, and TH8

Controls inverter cooling fan, using THHS temperature.

0˚C : 698kΩ 60˚C : 48kΩ 10˚C : 413kΩ 70˚C : 34kΩ 20˚C : 250kΩ 80˚C : 24kΩ 30˚C : 160kΩ 90˚C : 17.5kΩ 40˚C : 104kΩ 100˚C : 13.0kΩ 50˚C : 70kΩ 110˚C : 9.8kΩ

0˚C : 15kΩ 25˚C : 5.3kΩ 10˚C : 9.7kΩ 30˚C : 4.3kΩ 20˚C : 6.4kΩ 40˚C : 3.1kΩ

273+t

R0=17kΩ R25/120=4170 Rt = 17exp{4170( - )}

323

0˚C : 181kΩ 25˚C : 50kΩ 10˚C : 105kΩ 30˚C : 40kΩ 20˚C : 64kΩ 40˚C : 26kΩ

4.15MPa Set to OFF

1 Detects high pressure 2 Regulates frequency and protects

high pressure.

Low

-pressure sensor

63LS

Pressure 0~1.7MPa Vout 0.5~3.5V

0.173V/0.098MPa Pressure [MPa] =0.566✕Vout[V]-0.283

Gnd (Black) Vout (White) Vcc (DC5V) (red)

Connector

63LS

123

2 3

1 Detects low-pressure 2 Protects low-pressure

- 59 -

[2] Functions of Principal Parts

1. Outdoor Unit

Page 62

Name FunctionNotes Specification Check method

Symbol

(function)

Solenoid valve

Linear expansion valve

SV1 Dischargesuction bypass

SV3 Dischargesuction bypass

SV5b Heat exchanger capacity control

SV5c Heat exchanger capacity control

LEV1 (SC coil)

21S4b

21S4c

High/low pressure bypass at starting and stopping, and capacity control during low-load operation

2 High-pressure rise suppression

Provides compressor protection when Compressor No. 2 is at a stop

Controls outdoor unit heat exchanger capacity.

Controls heat exchanger unit heat exchanger capacity.

Adjusts the volume of bypass flow from the compressor unit during cooling operation.

Heats refrigerants in the compressor.

4-way valve

21S4a

Switches between cooling and heating cycles.

Switches between cooling and heating cycles. Controls outdoor unit heat exchanger capacity.

AC220

~240V Open when energized Closed when not energized

AC220

~240V Closed when energized Open when not energized

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

Same as indoor LEV. The resistance value is not the same as that of the indoor LEV. (Refer to the section on LEV troubleshooting.)

Resistance value check

Continuity check with a tester

Cord heater AC220~240V CH11,CH12·····1280Ω 45W

AC220~240V De-energized : cooling cycle Energized : heating cycle

AC220~240V De-energized : cooling cycle (Compressor unit heat exchanger capacity 100%) Energized : cooling cycle (Compressor unit heat exchanger capacity 50%) or heating cycle

AC220

~240V De-energized : cooling cycle (Heat exchanger unit heat exchanger capacity 100%) Energized : cooling cycle (Heat exchanger unit heat exchanger capacity 0%) or heating cycle

Continuity check with a tester

273+t

R0=15kΩ R0/80=3460 Rt = 15exp{3460( - )}

273

0˚C : 15kΩ 30˚C : 4.3kΩ 10˚C : 9.7kΩ 40˚C : 3.1kΩ 20˚C : 6.4kΩ 25˚C : 5.3kΩ

CH11, 12 Crankcase heater

Heater

Name FunctionNotes Specification Check method

Symbol

(function)

Thermistor

TH5b (Piping temperature)

Defrost control during heating operation

Resistance check

- 60 -

2. Heat exchanger Unit

Page 63

273+t

R0=15kΩ R0/80=3460 Rt = 15exp{3460( - )}

273

0˚C : 15kΩ 30˚C : 4.3kΩ 10˚C : 9.7kΩ 40˚C : 3.1kΩ 20˚C : 6.4kΩ 25˚C : 5.3kΩ

Name FunctionNotes Specification Check method

Symbol

(function)

Linear expansion valve

Thermistor

LEV

TH1

(Suction air

temperature)

TH2 (Piping temperature)

TH3 (Gas-side piping temperature)

TH4

(Outdoor air

temperature)

Temperature sensor

(Indoor

air temperature)

1 Adjusts superheat at the indoor

heat exchanger outlet during cooling

2 Adjusts subcool at the indoor heat

exchanger outlet during cooling

1 Indoor unit control (Anti-

freeze/heat adjustment)

2 LEV control during heating

operation (subcool detection)

Indoor unit control (Thermo)

LEV control during cooling operation (superheat detection)

Indoor unit control (Thermo)

DC12V Opening of stepping motor driving valve 0-1400 pulses

Resistance value check

Refer to the section on continuity test with a tester Continuity between white-red-orange Continuity between yellow-brown-blue

YellowMBlueBrown

White

Red

Orange

- 61 -

3. Indoor Unit

Page 64

- 62 -

SW4

SW5

–

Pump down operation

Heating Tcm

–

Unit model selection

–

Night mode/Step demand Night mode Demand function Before power on

–

SW3

Not connected to the centralized control

Ordinary control

–

Ordinary control

50 minutes

–

SW3-2 invalid

Stops all ICs

-8˚C

7˚C

–

Ordinary control

49˚C

Refer to the next page

–

Before power on

Unit model selection Refer to the next page Before power on

Before power on

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

Anytime after power on (Except during initial start up mode/becomes ineffective 2 hours after compressor start up)

–

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

–

Anytime after power on

After power on and when SW3-1 is on.

Anytime after power on

Anytime after power on (except during defrost operation)

–

After power on and while compressor is stopped

Anytime after power on

–

Switch Function

Function according to switch setting Switch setting timing

OFF ON OFF ON

SWU

SW2

1~2

Unit address setting

Centralized control switch

Deletion of connection information

Deletion of error history

Refrigerant amount adjustment

–

Forced defrost

Defrost timer setting

–

Test run: valid/invalid

Test run: ON/OFF

Defrost start temperature

Defrost end temperature

Set to 00 or 51-100 with the dial switch

Anytime after power on

SW1

1~10

For self-diagnosis/operation monitoring

Refer to the LED monitor display on the outdoor unit board

10 minutes after compressor start up

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

Connected to the centralized control

Deletion

Deletion of IC/OC error history

Storage of IC/OC error history

Refrigerant amount adjustment mode

–

Start forced defrosting

90 minutes

–

SW3-2 valid

Test runs all ICs

-5˚C

12˚C

–

Pump down operation

53˚C

–

–– ––

–

––––

–

–– ––

Emergency operation valid/invalid

Valid

Anytime after power on

Invalid

–

–– ––

Note: All are set to OFF at factory shipment

¶¶

Control

[1] Dip Switch Functions and Their Factory Settings

1. Outdoor unit

(1) Main board (Comp. unit)

Page 65

- 63 -

DipSW3-9

DipSW5-1

OFF ON

OFF Standard specification

High-static pressure (60Pa) specification

Standard specification

High-static pressure (30Pa) specification

Switch Function

Function according to switch setting Switch setting timing

OFF ON OFF ON

SW1

SW2

Enabling/disabling the following error detection functions: ACCT, DCCT sensor circuit error (530X Detail No. 115, 116) ACCT, DCCT sensor error (530X Detail No. 117, 118) IPM open/Disconnected CNCT2 (530X Detail No. 119) Detection of erroneous wiring (530X Detail No. 120)

–

Inverter address

–

Error detection enabled

–

Error detection disabled

–

Anytime after power on

–

––––

Always leave it to ON

–

Note 1 Except for SW2-1, all are set to OFF at factory shipment.

Unless otherwise specified, set the switch to OFF where indicated by “ ––,” which may be set to a certain setting for a reason.

Note 2 Leave SW1-1 off during normal operation. If it is turned on, errors cannot be detected and the unit may be damaged.

Switch Function

Function according to switch setting Switch setting timing

OFF ON OFF ON

SW2 1

Inverter address

–

Always leave it to ON

–

Note 1 Except for SW2-1, all are set to OFF at factory shipment.

Unless otherwise specified, set the switch to OFF where indicated by “ ––,” which may be set to a certain setting for a reason.

(2) INV board (Comp. unit)

(3) FAN board (Comp. unit, Hex. unit)

Page 66

Switch Function

Function according to switch setting Switch setting timing

OFF ON OFF ON

11,12

Used to set unit address

–

Set to 51-100 with the dial switch Note 1

SW 14 Used to set Hex. unit number 0...0, over 1...1 Note 2

SW2 1~3 Fan output during emergency operation Refer to “ª [4] 3. Outdoor unit fan” Note 3–While the unit is energized.

–

5 –––

6 –––

2 –

SW7 1 Unit model selection Refer to the following chart

–

Before power on

Unit model selection Refer to the following chart Before power on

–

3 –––

Note 1 Set to “00” at factory shipment. Note 2 Set to “0” at factory shipment. Note 3 All are set to OFF at factory shipment.

Unless otherwise specified, set the items with the “-” in the table to OFF, for they may have been set to a certain setting for a reason.

DipSW7-1

DipSW7-4

OFF ON

OFF Standard specification

High-static pressure (60Pa) specification

Standard specification

High-static pressure (30Pa) specification

- 64 -

(4) Controller board (Hex. unit)

Page 67

- 65 -

SW1

1 2 3 4 5 6 7 8

4 5

7 8 9

DIP SW1, 3

Switch Function

Function according to switch operation

Switch set timing

Remarks

OFF ON OFF ON Room temp. sensor position Clogged filter detect. Filter duration OA intake Remote display select. Humidifier control Heating thermo. OFF airflow Heating thermo. OFF airflow

Power failure automatic return

Power source start/stop Model selection

Louver

Vane

Vane swing function Vane horizontal angle

–

Heating 4K up

– –

Indoor unit inlet

None

100h

Ineffective

Fan output display

At stationary heating

Very low speed

SW1-7 setting

Ineffective

Heat pump

None

1st setting

–

Effective

– –

Built in remote controller

Provided

2500h

Effective

Thermo. ON signal display

Always at heat.

Low speed Set airflow

Effective

Cooling only

Provided

Provided Provided

2nd setting

–

Ineffective

– –

Always ineffective for PKFY-P.VAM

Not provided for PKFY-P.VAM

Ineffective (ON) setting for floorstanding

Cooling capacity saving for PKFY-P. VAM, effective/ineffective

  







At unit

stopping

(at remote

controller

OFF

)

SW3

Note:

When both SW1-7 and SW1-8 are being set to ON, the fan stops at the heating thermostat of OFF.

Model P20 P25 P32 P40 P50 P63 P71

Capacity code

4 5 6 8 101314

(model name)

SW2 setting

OFF

Model P80 P100 P125 P140 P200 P250

Capacity code

16 20 25 28 40 50

(model name)

SW2 setting

OFF

Setting of DIP SW2

6 Vane angle set for cooling Down blow B, C Horizontal Always down blow B,C for PKFY-P.VAM

2. Indoor unit

Page 68

- 66 -

Setting of DIP SW5

Option

Standard

220V

240V

ON : 220V

230V

OFF : 240V

OFF

(PLFY-P·VLMD-E)

Switch Function Operation by switch Switch set timing

Ceiling height setting

External static pressure setting

Setting of air outlet opening

Airflow control

For other models, change the setting of static pressure by replacing the connector.

Set to the option to install the high efficiency filter.

Always after powering

Ceiling height

33.5m

22.8m

12.3m

123

2-way

4.0m

(3.3m)

4.2m

(3.5m)

–

3-way

3.6m

(3.0m)

4.0m

(3.3m)

4.2m

(3.5m)

4-way

Values in the parenthese are for P32~80 types.

3.2m

(2.7m)

3.6m

(3.0m)

4.2m

(3.5m)

SWB SWA

(PCFY-P-VGM-E)

(PDFY-P20 ~ 80VM-E, PEFY-P20 ~ 80VMM-E)

100Pa

50Pa

30Pa

(PLFY-P-VAM-E)

2-way

3-way

4-way

(PLFY-P-VAM-E, PCFY-P-VGM-E, PKFY-P-VGM-E, PDFY-P-VM-E)

SWA

SWB

SWC

Page 69

- 67 -

1ON234

Before powering

Removing the cover shows switches at the lower part of the remote controller unit. By operating these switches, the

controller main/sub, and other function will be set. In normal case, do not change the setting except No.1 switch used to set the main/sub. (All setting at factory shipment are "ON."

Set the address of the remote controller with the rotary switch.

Remote controller unit

Switch

Function ON OFF Action by switching Switch set timing

Remote controller

Main Sub

main/sub

At powering of Normal Timer mode remote controller start up start up

Cooling/heating display

Yes No

at automatic setting

Inlet temperature display

Sets one to "Sub" when connecting 2 sets in 1 group.

Sets to "Timer mode start up" so desired at power failure return when the schedule timer is connected.

Sets to "No" when not desiring to display "Cooling" or "Heating."

Sets to "No" when not desiring to display inlet temperature.

Address setting range Setting method

Main remote controller 101 ~ 150 Set to the lowest indoor main unit address + 100.

Sub remote controller 151 ~ 200 Set to the lowest indoor main unit address + 150.

Setting of rotary switch Address No.

01 ~ 99 101 ~ 199 being added with 100

00 200

Note : To set addresses, use a precision screwdriver [(–), 20mm (w)], and apply load less than 19.6N.

Operating with a method other than above may damage the rotary switch.

❉ The address No. that can be set with ME remote controller is limited to 101 ~ 200.

The position of 100 will automatically be fixed to [1] when setting to "01 ~ 99", while it will automatically be fixed to [2] when setting to "00."

❉ At factory shipment, the rotary switch was set to 01.

10 digits 1 digit

(left) (right)

Selector switch Remote controller unit

Remote controller unit

Rotary switch

Example: In case of address 108

remote

3. Remote controller

(1) MA remote controller (PAR-20MAA)

(2) ME remote controller (PAR-F27MEA)

Page 70

- 68 -

No.1 Compressor

Stopped Stopped OFF

In operation Stopped ON

In operation In operation OFF

No.2 Compressor SV3

ON for 4 minutes

ON for 2 minutes

Always ON. (Exception : OFF when HPS-LPS 0.2MPa)

ON for 3 minutes. (Exception : OFF when HPS 0.2MPa)

Always ON

Always OFF during cooling operation and always ON

during heating operation when running an oil-recovery operation after running a

continuous operation at low frequency.

When low pressure (LPS) drops below 0.23 MPa.

When low pressure (LPS) exceeds

0.38 MPa.

When Pd exceeds 3.77 MPa

When Pd is or below 3.43 MPa and 30 seconds has passed

SV1

Operation Timing

ON (Open) OFF (Close)

At No. 1 compressor start up or at No. 2 compressor start up

After the restoration of thermo or 3 minutes after restart

During cooling or heating operation with the compressor stopped

After the operation has stopped

During defrost operation (See figure

✻1 below)

During oil-recovery operation

During an operation with the compressor running at 30Hz When low pressure (LPS) drops (After 3 minutes have past since start up)

When high pressure (Pd) rises

[ Example of an SV1 operation ]

Start up

Thermo. Thermo. Defros-

ting Time

Stop

OFF ON

Compressor

Bypass solenoid

valve (SV1)

(4-minute)

(2-minute) (8-minute) (3-minute)

[2] Controlling the Outdoor Unit

1. Initial control

• When the power is turned on, the initial processing of the microcomputer is given top priority.

• During the initial processing, control processing of the operation signal is suspended. The control processing is

resumed after the initial processing is completed. (Initial processing: processing of the data inside the microcomputer and initial setting of each LEV opening, requiring up to approximately 2 minutes.)

• During the initial processing, the LED monitor on the outdoor unit’s main board displays “S/W version”, “refrig- erant type”, “heat pump”, “cooling only and capacity” in turn every second.

2. Control at start-up

• The upper limit of frequency during the first 3 minutes of the operation is 50Hz.

• When the power is turned on, normal operation will start after the initial start-up mode (to be described later)

has been completed (with a restriction on the frequency).

3. Bypass control

Bypass solenoid valves (SV1, SV3), which bypass the high- and low- pressure sides, operate in the following manner.

(1) Bypass solenoid valve (SV1) (ON = Open)

(2) Bypass Valve (SV3) (ON = Open)

• The opening SV3 is controlled by the configuration of No.1 and No.2 compressor operations.

Page 71

- 69 -

Model Frequency/cooling Frequency/heating Speed

P700 type

No.1 Compressor

No.2 Compressor

No.1 Compressor

No.2 Compressor

No.1 Compressor

No.2 Compressor

Compressor

20~89Hz 20~105Hz

3Hz/sec.

20~89Hz 20~105Hz

P750 type

20~97Hz 20~111Hz

3Hz/sec.

20~97Hz 20~111Hz

P800 type

20~104Hz 20~115Hz

3Hz/sec.

20~104Hz 20~115Hz

✻ The maximum frequency during heating operation is affected by the outdoor air temperature to a certain extent.

4. Frequency control

• Depending on the capacity required, the frequency of the compressor is controlled to keep constant the evaporation temperature (0˚C = 0.71MPa) during cooling operation and condensing temperature (49˚C = 2.88MPa) during heating operation.

• The capacity is controlled by No.1 compressor (inverter driven) and No.2 compressor (inverter driven).

• When No.2 compressor operates, the frequency of No.1 compressor and No.2 is approximately the same.

• The following table shows the frequency change of the inverter compressor during normal operation.

(1) No. 2 compressor operation/stop

1 No. 2 compressor going from stop to in-operation

When No.1 compressor does not meet the capacity requirement, No.2 compressor will start its operation.

2 No. 2 compressor going from in-operation to stop

When an operation of both No.1 and No.2 compressors exceeds the capacity requirement, No.2 compressor will stop its operation.

(2) Pressure limit

The maximum limit of high pressure (Pd) is set for each frequency level. If this limit is exceeded, the frequency will be reduced every 30 seconds.

(3) Discharge temperature limit

The discharge temperature (Td) of the compressor in operation is detected, and if it exceeds the upper limit, the frequency is reduced by 5 Hz.

• Control is performed 30 seconds after compressor start-up and every 30 seconds thereafter.

• Operating temperature is 115˚C.

(4) Periodic frequency control

Frequency control other than the ones performed at startup, upon status change, and for protection is called periodic frequency control (conversent control) and is performed in the following manner. 1 Periodic control cycle

Periodic control is performed after the following time has passed

(a) 30 seconds after either compressor start up or the completion of defrost operation (b) 30 seconds after frequency control by discharge temperature or by pressure limit

2 The amount of frequency change

The amount of frequency change is controlled to approximate the target value based on the evaporation temperature (Te) and condensing temperature (Tc).

Page 72

- 70 -

5. Defrost operation control

(1) Starting the defrost operation

• Defrost operation is started when the compressor unit pipe temperature (TH5) and the heat exchanger unit

pipe temperature (TH5b) of -8˚C or below have continuously been detected for 3 minutes after the integrated compressor operation time of 50 minutes have passed.

• If 10 minutes have passed since compressor start-up or since the completion of defrost operation, forced

defrost operation will start by turning on the forced defrost switch (DIPSW2-7).

• Even if the defrost prohibit timer is set to 90 minutes, the actual defrost prohibit time for the next operation

will be 50 minutes if defrosting took 15 minutes.

(2) Defrost operation

(3) Completion of defrost operation

• Defrost operation will stop when 15 minutes have passed since the beginning of defrost operation, or when

the compressor unit pipe temperature (TH5) and the heat exchanger unit pipe temperature (TH5b) of 7˚C has been continuously detected for 3 minutes.

• Defrost operation will not stop its operation for 2 minutes once started unless the piping temperature

exceeds 30˚C within 2 minutes, in which case the operation will stop.

(4) Problems during defrost operation

• If a problem is detected during defrost operation, the operation will be stopped, and the defrost prohibition

time based on the integrated compressor operation time will be set to 20 minutes.

(5) Change in the number of operating indoor units during defrost operation

• Even when there is a change in the number of operating indoor units during defrost operation, the operation

will continue, and an adjustment will be made after the completion of the defrost operation.

• Defrost operation will be continued, even if the indoor units stop or if thermo is turned off, until it has run its

course.

Compressor frequency

Hex. unit fan Stopped

Comp. unit fan Stopped

SV1 ON

SV3 ON

21S4a OFF

21S4b OFF

21S4c OFF

SV5b OFF

SV5c OFF

LEV1

480 pulses

Model No.1 Compressor No. 2 Compressor

P700 type 115 115

P750 type 115 115

P800 type 115 115

Page 73

- 71 -

6. Refrigerant recovery control

• Recovery of refrigerant is performed during heating operation to prevent the refrigerant from accumulating inside the unit while it is stopped (unit in fan mode), or inside the indoor unit that is in cooling mode or in heating mode with thermo off. It is also performed during cooling operation to prevent an excessive amount of refrigerant from accumulating in the outdoor heat exchanger.

[During heating operation]

(1) Initiation of refrigerant recovery

• Recovery of refrigerant during heating operation begins when all of the following three conditions are met:

1 15 minutes have past since the completion of previous refrigerant recovery. 2 Td >115˚C 3 Frequencies below 50 Hz

(2) Refrigerant recovery

• Refrigerant is recovered with the LEV on the

applicable indoor unit (unit under stopping mode, fan mode, cooling, heating with thermo off) being opened for 30 seconds.

• Periodic capacity control of the outdoor units and

periodic LEV control of the indoor units will be suspended during refrigerant recovery operation; they will be performed after the recovery has been completed.

• Defrost operation will be suspended until refrigerant recovery has been completed.

7. Outdoor unit fan (Hex. unit control)

(1) Control method

• The air volume of outdoor unit fan is controlled by the inverter control to maintain a constant evaporation

temperature (0˚C = 0.71 MPa) during cooling operation and constant condensing temperature (49˚C = 2.88MPa) during heating operation, depending on the required capacity.

• The heat exchanger capacity of the compressor unit is controlled by the 4-way valve (21S4b) and the sole-

noid valve (SV5b).

• The heat exchanger capacity of the heat exchanger unit is controlled by the 4-way valve (21S4c) and the

solenoid valve (SV5c).

(2) Control

• Outdoor unit fan stops while the compressor is stopped (except when there is an input from snow sensor).

• The fan operates at full speed for 5 seconds after start up (except the units with high static pressure specifi-

cations).

• The outdoor unit fan stops during defrost operation.

[During cooling operation]

(1) Initiation of refrigerant recovery

• Recovery of refrigerant during cooling operation begins when all of the following conditions are met:

1 30 minutes have past since the completion of previous refrigerant recovery. 2 When discharge temperature has remained above the limit continuously. 3 Td > 105˚C or [Pd > 3.43MPa (35kg/cm2G and SC0 >10deg)]

(2) Refrigerant recovery

• Increase the opening of LEV1 (Periodic control begins when 30 seconds have elapsed).

Opening of LEV during refrigerant recovery (Opening of indoor unit LEV: 400 pulses)

Initial opening of LEV

30 seconds

Start Finish

Page 74

Flow chart of initial operation mode

Start of initial operation mode

Step 1

• Operation of only No.1 compressor

Exception : • Completed if discharge super heat reaches above 25

˚C within

5 minutes of start up.

• Completed if super heat under compressor keeps above 10

˚C

for 3 minutes in a row.

Step 3

• No.1 compressor starts operation when f=20Hz.

• No.2 compressor starts operation when f=40Hz within 30 seconds since the

beginning of the operation and when f=50Hz after 30 seconds.

• Completed in the integrated operation time of 5 minutes.

Completion of initial operation

For the first 30minutes f 60Hz, 30minutes and on f 85Hz. No.2 compressor not in operation. Completed in the integrated operation time of 40 minutes.

- 72 -

Operation

mode

Note 1 : 21S4a, 21S4b and 21S4c are not energized during cooling cycle and energized during heating cycle. Note 2 : SV5b and SV5c are not energized when it is open and energized when it is closed. Note 3 : While the unit is stopped, 21S4a, 21S4b and 21S4c are not energized and in cooling cycle, and SV5b and

SV5c are opened.

Hex. capacityUnit

Comp. unit

Inverter

control

Comp. unit

4-way valve

21S4a OFF 21S4b ON

21S4a OFF 21S4b OFF

21S4a ON 21S4b ON

Comp. unit

solenoid valve

SV5b ON5~100%50%

Cooling

Heating

Number

of fans

21S4a OFF 21S4b OFF

SV5b OFF

10~100%

100% 2

Hex. unit

Comp. unit

Hex. unit

21S4c ON

SV5c ON0%

0% 0

21S4c OFF

SV5c OFF

SV5b OFF

SV5c OFF

15~100%100%

100%

Defrost

8. Subcool coil control (Linear expansion valve <LEV1>)

• The amount of super heat is controlled and kept constant based on the bypass outlet temperature (TH8) of subcool coil every 30 seconds.

• The degree of opening is controlled based on the subcool coil outlet/inlet temperature (TH5, TH7), high pressure (Pd), and discharge temperature. However, the LEV will be closed (0) during heating operation and when the compressor is stopped, and it will be open during cooling operation with thermo off.

• It stays open at 480 during defrost operation.

9. Control at initial startup

• When the unit is started for the first time, it will run the following course of operation.

(3) Patterns of outdoor unit heat exchanger capacity control

Page 75

No.1 compressor

ON/OFF

No.2 compressor

ON/OFF

Completion of initial start up operation

Step 1

Stop

Step 3

40 minutes 5 minutes

f=40Hz

f=50Hz

f 60Hz

f=20Hz

30seconds

- 73 -

4250 → reset → retry

→ 4240 → reset → emergency operation

✻ After a “ retry ” operation, if a

different type of error that is listed under <Inverter error> on the left is detected, an emergency operation is run after a reset.

Pattern of emergency operation mode

Error source

Outdoor unit

Codes of the errors that allow an emergency operation

Heatsink thermistor 4230 <Inverter error> Over-current break 4250 Overload protection 4240 Heatsink overheat protection 4230 Cooling fan error 4260 Bus voltage drop protection 4220 IDC sensor/circuit error 5301 VDC sensor/circuit error 4200 THHS sensor/circuit error 5110 IPM communication error 0403

Codes of the errors that do not allow an emergency operation

All errors other than the ones listed on the left

Operation

Emergency operation with only No.2 compressor

Problems with No.1 (INV)

Problems with No.2

↑

< Initial start-up control: Time chart >

10. Emergency operation mode

Emergency operation mode is an operation that the unit runs on a first-aid basis when problems occur with the compressors (No.1, No.2). It can be started by performing an error reset on the remote controller.

[Example1]

(1) Starting an emergency operation

1 Occurrence of error → error source and error code displays on the remote controller 2 Error reset on the remote controller 3 If the remote controller displays the type of error that allows an emergency operation, (as in above) (refer to

the table below) the unit will begin “ retry ” operation. (Same usual operation as the operation after error reset.)

4 When the same type of error is detected during the “ retry ” operation Item 3 above, perform another error

reset on the remote controller and run an emergency operation suitable for the type of the error.

(2) Finishing the emergency operation mode

[Finishing conditions] When one of the following conditions is met, emergency operation will end.

1 When an integrated operation time of compressor in cooling mode operation has reached 4 hours. 2 When an integrated operation time of compressor in heating mode operation has reached 2 hours. 3 When an error is detected that does not allow the unit to run an emergency operation.

[Control at the completion of and after an emergency operation]

• To end the operation, stop the compressor and bring up the error code on the display on the remote

controller.

• If another error reset is performed upon finishing an emergency operation, the unit will run a “ retry ”

operation again and will repeat the procedures

1 through 4 under section (1) above.

• To finish an emergency operation and to run a current-carrying operation after correcting the error, perform

a power reset.

Page 76

- 74 -

Cooling mode

Heating mode

Dry mode

Fan mode

Stopping mode

Cooling mode

Heating mode

Stopping mode

Note : If the outdoor unit is already in the cooling mode, other indoor units (in stopping mode, fan mode, thermo OFF) will not run a heating operation when directed to do so, and

“HEAT” on the remote controller will blink. When the outdoor unit is already in the heating mode, the reverse will be true. (The first selection made on the remote controller has the priority.)

All indoor units in operation are in cooling mode.

All indoor units in operation are in heating mode.

All indoor units are in fan mode or stopping mode.

NO OK

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

(Wrong)

(Correct)

100%

→

75%

→

50%

Demand control

steps

Adaptor for external input

(PAC-SC36NA)

CN3D

Maximum allowable length of wiring is 10 m.

SW1 : NIGHT MODE or demand command SW2 : Demand command X,Y : Relay (contact rating DC1mA)

SW1

SW2

Orange 1

Brown 2

Red 3

Remote controller board

Relay circuit

Outdoor unit controller board

Power supply to relay

To be acquired on site

[ Example of wiring connection ]

OPEN

SHORT

OPEN

SHORT

OFF

Compressor ON/OFF

CN3D 1-3P

OPEN

SHORT

OFF

NIGHT MODE

CN3D 1-2P

100% (no demand) 75%

0% 50%

CN3D 1-3P

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

(Example) When witching from 100% to 50%

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

SW4-7 : ON (STEP DEMAND)

11. Operation mode

(1) Indoor unit operation modes

An operation mode can be selected from the following 5 modes on the remote controller.

12. Demand control

Cooling/heating operation can be prohibited (thermo OFF) by an external input to the indoor units. Note : When DIPSW4-7 are on, STEP DEMAND are possible. NIGHT MODE will become unavailable however.

(2) Outdoor unit operation mode

Page 77

3-minute drain pump ON

Operation mode

Cooling mode

Cooling display

Prohibition

Cooling operation

Refer to 2-(1)

Heating mode

Heating display

Prohibition

Heating operation

Refer to 2-(2)

Dry mode

Dry display

Prohibition

Dry operation

Refer to 2-(3)

Fan mode

Fan display

Fan operations

Start

Breaker

turned on

Operation SW

turned on

1. Protection function self-holding cancelled.

2. Indoor unit LEV fully closed.

Remove controller

display extinguished

Auxiliary heater

FAN stop

Drain pump

1. Auxiliary heater OFF

2. Fan low speed for 1 minute

Prohibition “Remote

controller blinking”

Operation command to outdoor unit (to 2 )

Error mode

Error stop

Error display

Protection function self-holding

Error command

to outdoor unit

Indoor unit LEV

fully closed

Normal operation

Trouble observed

Stop

YES

Note: ❉3

YES

Note: ❉3

YES

Note: ❉3

Note: ❉2

Note: ❉1

Notes :

❉1 Indoor unit LEV fully closed : Opening 41. ❉2 The error mode includes that of indoor units and outdoor units. At indoor side error (excluding water leak), the indoor unit in

trouble only will be stopped in emergency, while at outdoor side error, all indoor units connected will be stopped.

❉3 Prohibition status is observed when the set cooling/heating mode is different from that of the outdoor unit.

From outdoor unit

- 75 -

[3] Operation Flow Chart

1. Flow to determine the mode

(1) Indoor unit (cooling, heating, dry, fan mode)

Page 78

YES

Start

Breaker

turned on

Set indoor

address No. to remote

controller

Operation command

Operation

mode

Error mode

52C1 ON

Operation

mode

Error stop

Outdoor unit LED error display

Protection function self-holding

Error command to indoor unit

Note: ❉1

Cooling-only, Heating-only, Cooling/heating mixed

From outdoor uni

Normal operation

Trouble observed

Stop

“HO” blinks on the remote controller

1. 52C1 OFF

2. Inverter output 0Hz

3. Outdoor fan Stop

4. All solenoid valve OFF

1. Protection function selfholding cancelled

2. LEV1 fully closed

Note: ❉2

Note: ❉3

Notes :

❉1 For about 3 minutes after turning on power source, address and group information of outdoor unit, indoor unit, and remote

controller are retrieved by remote controller, during which “HO” blinks on and off on remote controller. In case indoor unit is not grouped to remote controller, “HO” display on remote controller continues blinking even after 3 minutes after turning on power source.

❉2 Two trouble modes include indoor unit side trouble, and outdoor unit side trouble. In the case of indoor unit side trouble, error

stop is observed in outdoor unit only when all the indoor units are in trouble. However, if one or more indoor units are operating normally, outdoor unit shows only LED display without undergoing stop.

❉3 The operation mode conforms to mode command by indoor unit. However, when outdoor unit is under cooling operation, the

operation of indoor unit will be prohibited even by setting indoor units under operation, or indoor unit under stopping or fan mode to heating mode. Reversely when outdoor unit is being under heating operation, the same condition will be commenced.

Heating operation

Refer to 2-(2)

Cooling/dry operation

Refer to 2-(1), 2-(3)

Operation command to indoor unit To 1

- 76 -

(2) Outdoor unit (cooling, heating mode)

Page 79

YES

Cooling operation

4-way valve OFF

Indoor unit fan

operations

Test run start

Thermostat

3-minute

restart preven-

tion

1. Inverter output 0Hz

2. Indoor LEV, LEV1 rated opening

3. All solenoid valves OFF

4. Outdoor unit fan stop

5. 52C1 OFF

1. Inverter frequency control

2. Indoor unit LEV, LEV1 control

3. Solenoid valve control

4. Outdoor unit fan control

5. 52C1 control

Normal operation

Trouble observed

Stop

Note: ❉1

YES

Note :

❉1 The indoor fan operates at the set notch under cooling regardless of thermostat ON/OFF.

- 77 -

2. Operation under each mode

(1) Cooling operation

Page 80

YES

Heating operation

Defrost

operation

4-way valve OFF

Test run start

Thermostat

3-minute

restart prevention

Normal operation

Trouble observed

Stop

Test run

4-way valve OFF

Notes :

❉1 When outdoor unit starts defrosting, it transmits defrost operations command to indoor unit, and the indoor unit starts defrosting

operations. Similarly when defrosting operation stops, indoor unit returns to heating operation after receiving defrost end command of outdoor unit.

❉2 Defrost ending condition : Defrost operation for 10 minutes or more, or outdoor piping temperature : refer to “5. Defrost operation

control” of [2] ControlIing the Outdoor Unit.

1. Indoor unit fan stop

2. Inverter defrost frequency control

3. Indoor unit LEV fully closed

4. Solenoid valve control

5. Outdoor unit fan stop

6. LEV1 control

7. 52C1 control

Defrost end

Return to

heating operation

Note: ❉1, 2

1. Indoor unit fan very low speed operation

2. Inverter output 0Hz

3. Indoor unit LEV, LEV1 fully closed

4. Solenoid valve all OFF

5. Outdoor unit fan stop

6. 52C1 OFF

1. Indoor and outdoor unit fan control

2. Inverter frequency control

3. Indoor unit LEV, LEV1 control

4. Solenoid valve control

5. 52C1 control

- 78 -

(2) Heating operation

Page 81

YES

Normal operation

Trouble observed

Stop

Dry operations

4-way valve OFF

Test run start

Inlet temp.

≥ 18°C

Notes :

❉1 When indoor unit inlet temperature exceeds 18°C, outdoor unit (compressor) and indoor unit fan start intermittent operations

synchronously. The fan always operates (at low spped) when it decreases below 18˚C. Operations of outdoor unit, indoor unit LEV and solenoid valve accompanying compressor ON are the same as those in cooling operations.

❉2 Thermostat is always kept on in test run, and indoor and outdoor unit intermittent operation (ON) time is a little longer than

normal operations.

1. Indoor unit fan stop

2. Inverter output 0Hz

3. Indoor unit LEV, LEV1 fully closed

4. Solenoid valve OFF

5. Outdoor unit fan stop

6. 52C1 OFF

1. Outdoor unit (Compressor) intermittent operations

2. Indoor unit fan intermittent operations (Synchronized with compressor : low speed, OFF operations)

Thermostat ON

Note: ❉2

Note: ❉1

1or2

- 79 -

(3) Dry operation

Page 82

- 80 -

1 Check refrigerant leak, loose power source or transmission line if found.

Measure resistance between the power source terminal block and ground with a 500V megger to confirm it is exceeding 1.0MΩ. Notes: 1.

Confirm that the ball valves are fully opened at both gas and liquid sides.

[When connected to the transmission booster for transmission line] Before turning on the outdoor unit, turn on the transmission booster for transmission line.

Note: 1. Make sure to tighten the cap.

Check the phase order of the 3-phase power source and the voltage between each phase. Note: 1. Open phase or reverse phase causes the emergency stop of test run. (4103 error)

Turn the main power source on 12 hours at least before test run to power the crankcase heater. Note: 1. Shorter powering time may cause compressor trouble.

Do not operate the unit when the insulation resistance stays below 1.0MΩ. Never apply a megger to the transmission line terminal block. Otherwise, the control board will be damaged. At immediately after installation or when the unit is left with the main power source turned off for a long time, the insulation resistance between the power source terminal block and ground may drop down to 1MΩ approximately due to refrigerant accumulated inside the compressor. When the insulation resistance counts for more than 1MΩ, power the crankcase heater for 12 hours or more by turning the main power source on. Doing this way evaporates refrigerant inside the compressor leading to increase the insulation resistance. Never measure the insulation resistance of the transmission terminal block for the MA remote controller.

Notes: 1.

When the outdoor unit is turned on first, connection information of refrigerant system may not be confirmed normally. If the outdoor unit is turned on first, after turning on the transmission booster for transmission line, reset the power of the outdoor unit.

STAND BY DEFROST

ERROR CODE

D A I L Y

AUTO OFF

CENTRALLY CONTROLLED

CLOCK

REMAINDER

ON OFF

ßC

1Hr.

NOT AVAILABLE

ßC

CHECK MODE

FILTER

CHECK

TEST RUN

LIMIT TEMP.

ON/OFF

TEMP

FILTER

CHECK TEST

ON OFF

CLOCK

PAR-F27MEA

TIMER SET

Test run display ON/OFF lamp ON/OFF button

Vertical air direction button Test run button

Ventilation button

❉ The illustration shows MA remote controller.

( )Powering display

Check code display

Test run remaining time display

Indoor unit liquid pipe temperature display

Set temperature button

Operation selector button

Louver button

Air speed button

••

Test Run

[1] Check Items before Test Run

[2] Test Run Method

Operation procedure

Turn on universal power supply at least 12 hours before getting started Displaying “HO” on display panel for about 5 minutes

Press

TEST

button twice Displaying “TEST RUN’’ on display panel

Press

selection button Make sure that air is blowing out

Press

select button to change from cooling to heating operation, and vice versa Make sure that warm or cold

air is blowing out

5 Press

adjust button Make sure that air blow is changed

6 Press

or button to change wind Make sure that horizontal or downward blow is adjustable.

Make sure that indoor unit fans operate normally

8 Make sure that interlocking devices such as ventilator operate normally if any

9 Press

ON/OFF

button to cancel test run Stop operation

Note 1: If check code is displayed on remote controller or remote controller does not operate normally.

2: Test run automatically stops operating after two hours by activation of timer set to two hours. 3: During test run, test run remaining time is displayed on time display section. 4: During test run, temperature of liquid pipe in indoor unit is displayed on remote controller room temperature display section.

5: When pressing

adjust button, depending on the model, “NOT AVAILABLE” may be displayed on remote controller.

However, it is not a malfunction.

6: When pressing

or button, depending on the model, “NOT AVAILABLE” may be displayed on remote controller.

However, it is not a malfunction.

Page 83

- 81 -

Emergency stop at 1500 remote controller display (excessive refrigerant replenishment)

Operating frequency does not fully increase, thus resulting in insufficient capacity

Emergency stop at 1102 remote controller display (discharge temperature trouble)

Clarify relationship between the refrigerant amount and operating characteristics of CITY MULTI new refrigerant series, and perform service activities such as decision and adjustment of refrigerant amount on the market.

1. Operating characteristics and refrigerant amount

The followings are operating characteristics and refrigerant amount which draw special attention.

During heating operations, liquid level of accumulator is the highest when all the indoor units are operating.

Tendency of discharge temperature

1. Symptom

The symptoms shown in the table below are the signs of excess or lack of refrigerant amount. Be sure to adjust refrigerant amount in the refrigerant amount adjustment mode, by checking operation status, judging refrigerant amount, and performing selfdiagnosis with LED, for overall judgment of excess or lack of refrigerant amount .

Excessive refrigerant replenishment

Insufficient refrigerant replenishment

2. Refrigerant volume

Checking the operating condition

Operate all the indoor units on cooling or on heating, checking the discharge temperature, sub-cooling, low pressure saturation temperature, inlet temperature, shell bottom temperature, liquid level, liquid step, etc. and rendering an overall judgment.l

Discharge temperature is high. (Normal temperature: 95˚C or below)

21Low pressure is extremely low.

3 Inlet superheating is high (if normal, SH = 20K or lower).

6 Inlet super heating is low (if normal, SH = 10K or higher).

Refrigerant volume tends toward insufficient.

Refrigerant volume tends toward overcharge.

Condition Judgment

❉1 Low pressure saturation temperature (Low pressure shell compressor)

During cooling operation, the amount of refrigerant in the accumulator is the smallest when all indoor units are in operation.

Discharge temperature is more likely to rise when there is a lack of refrigerant.

Discharge temperature is more likely to rise when high-pressure is high. Discharge temperature is more likely to rise when the low temperature is low.

Little change in discharge temperature is seen, even if the refrigerant is increased or decreased while there is refrigerant in the accumulator.

Compressor shell temperature is 10~60K higher than low pressure saturation temperature (Tc) when refrigerant amount is appropriate. → Judged as over replenishment when temperature difference from low pressure saturation temperature (Te) is 5K or less.

Shell bottom temperature is high (the difference with the low pressure saturation temperature

❉1 is 60K or greater)

Shell bottom temperature is low (the difference with the low pressure saturation temperature

❉1 is 5K or higher.)

[3] Operating Characteristics and Refrigerant Amount

[4] Adjustment and Judgment of Refrigerant Amount

Page 84

- 82 -

3. Amount of additional refrigerant to be charged

At the time of shipping from the factory, the outdoor unit is charged with the amount of refrigerant shown in the following table, but since no extension piping is included, please carry out additional charging on-site.

Calculation formula:

Calculate the additional refrigerant volume by calculating the size of the extension liquid piping and its length (unit : m)

Additional refrigerant volume (kg) = (0.29 x L

0) + (0.2 x L1) + (0.12 x L2) + (0.06 x L3) + (0.024 x L4) + α

1 : Length of

15.88 liquid pipe (m)

0 : Length of

19.05 liquid pipe (m)

L2 : Length of φ 12.7 liquid pipe (m) L

3 : Length of

9.52 liquid pipe (m)

4 : Length of

6.35 liquid pipe (m)

α : Refer to the right table.

❉❉ In the calculation results, round up fractions smaller than 0.01kg. (Example: 14.04kg

In case of PUHY-P700~P800, when the sum of the amount of charged refrigerant to the outdoor unit at

factory shipment and the amount of additional refrigerant to be charged to the extension piping exceeds 73kg, calculate the sum of the amount as 73kg.

Amount of charged refrigerant at factory shipment + Amount of additional refrigerant to be charged 73kg.

❉ Refrigerant is charged to the compressor unit.

→ 14.1kg)

Example : PUHY-P700

Outdoor unit model name P700

Refrigerant charge volume 27.0kg

P750

27.0kg

P800

27.0kg

Total capacity of connected indoor unit α

~80 81 ~ 160 1.5kg 161 ~ 330 2.0kg 331 ~ 480 2.5kg 481 ~ 630 3.0kg 631 ~ 710 4.0kg 711 ~ 890 5.0kg 891 ~ 1070 6.0kg

Each pipe is of liquid piping.

< Example > Indoor

when

Therefore, < Calculation example >

ø15.88 : C = 10m

ø19.05 : B = 40m

ø12.7 : A = 3m ø9.52 : D + E + F + G + C + a + b + d = 5 + 5 + 5 + 10 + 15 + 15 + 5 = 60m ø6.35 : e + f =5 + 5 = 10m

1. 250Type A :

ø12.7 3m a : ø9.52 15m

2. 200Type B :

ø19.05 40m b : ø9.52 15m

3. 125Type C :

ø15.88 10m c : ø9.52 10m

4. 63Type D :

ø9.52 5m d : ø9.52 5m

5. 50Type E :

ø9.52 5m e : ø6.35 5m

6. 25Type F :

ø9.52 5m f : ø6.35 5m

Additional charge volume = 40 x 0.29 + 10 x 0.20 + 3 x 0.12 + 60 x 0.06 + 10 x 0.024 + 4.0

= 21.8kg

1.0kg

≤

A B

DEF

acde

Hex. unit

First branching

Indoor

Indoor Indoor Indoor

Comp. unit

Indoor

Page 85

Since the refrigerant volume adjustment introduced in this chapter is just for emergency need, correct adjustment to meet the rated refrigerant volume is difficult. Please judge for adequate volume by following the flow chart later under normal operation mode.

1. Procedure

Depending on the operating conditions, it may be necessary either to charge with supplementary refrigerant, or to drain out some, but if such a case arises, please follow the procedure given below.

(1) Switching the function select switch (SW2-4), located on the outdoor unit's control board, ON starts

refrigerant volume adjustment mode operation and the following operation occurs

Operation The outdoor unit LEV1 diverges more than usual during cooling operation.

Notes: 1. Even if the refrigerant volume has reached a suitable level shortly after starting refrigerant volume adjustment

mode, if left for a sufficient length of time (once the refrigeration system has stabilized), there are times when this level may become unsuitable.

1) The refrigerant volume is suitable; When the refrigerant volume for TH5 - TH7 is more than 5K at the outdoor unit, and 5 to 15K for SH at the indoor unit.

2) The current volume is suitable, however, may become unsuitable after a certain length of time; When the refrigerant volume for TH5 - TH7 is less than 5K at the outdoor unit, or less than 5K for SH at the indoor unit.

2. There are times when it becomes difficult to determine the volume when performing refrigerant adjustments if the high pressure exceeds 2.0MPa.

Self-diagnosis switch for TH11

Self-diagnosis switch for TH7

Self-diagnosis switch for TH5

Self-diagnosis switch for Tc

1 2 3 4 5 6 7 8 9 10

Using these, judge TH11, Tc - TH5 and Tc - TH7.

3. Based on the following flowchart, use TH11, TH5, TH7 and Tc to adjust the refrigerant volume. Use the self-

diagnosis switch (SW1) on the outdoor unit main PCB to display TH11, TH5, TH7 and Tc.

4. Refrigerant adjustment mode operation will automatically stop in 90 minutes. By turning off and on SW 2-4,

the adjustment mode operation can be run again.

- 83 -

[5] Refrigerant Volume Adjustment Mode Operation

Page 86

YES

Start

SW2-4 ON

All indoor units are run in

test cooling mode

Minimum of

30 minutes continuous

operation

Has the compressor

operating frequency stabilised? Note2

A stable com pressor

frequency.

Is 8 ≤ TC-TH5 12K ?

Is Tc-TH7 20K ?

❉ Refer to the previous page for Notes 1

through 4.

Note1

Note3

Add a small amount of refrigerant at low pressure service port.

Remove a small amount of refrigerant at low pressure service port.

Wait 5minutes before making next judgment.

Add a small amount of refrigerant at low pressure service port.

Is Tc-TH5 < 8K ?

Caution

Ensure that no refrigerant is released into the atmosphere.

Caution

Use liquid refrigerant to fill the system.

Wait 5 minutes before making judgment on Tc-TH5.

≤

≥

SW2-4 OFF

System has the correct

amount of refrigerant

Note4

• If gas refrigerant is used to seal the system, the

composition of the refrigerant in the cylinder will change and performance may drop.

Has the initial start-up

mode been completed?

Is TH11 ≤ 100˚C ?

Is TH11 95˚C ?

- 84 -

[ Refrigerant Adjustment Method ]

Page 87

Unable to execute cooling (heating) operation while other indoor unit is under cooling (heating) operation.

Because of the control action of the auto-vane, horizontal blow may be commenced automatically one hour after using for down blow in cooling. Horizontal blow will also be commenced at defrosting under heating, at the time of the hot adjust and the thermostat off.

Very low speed operation is commenced at thermostat OFF. At thermostat ON, the very low speed operation automatically changes over to the set value by the time or piping temperature.

Fan stops under defrosting operation.

When the auxiliary heater is turned on, fan operates for one minute after stopping to remove residual heat.

Very low speed for 5 minutes after SW "ON" or until the piping temperature reaches 35˚C. Thereafter, the set value is commenced after low speed for 2 minutes. (Hot adjust control)

The system is under starting up. Operate the remote controller after the blinking of “HO” is disappeared.

At stopping of cooling operation, drain pump operates for 3 minutes further.

Run drain pump if drain water is generated even under stopping.

Symptom Remote controller display Cause

Indoor unit does not run while operating for cooling (heating).

Auto-vane runs freely.

Air speed setting switches over freely during heating operation.

Fan stops during heating operation.

Fan does not stop while stopping operation.

Air speed does not attain the set value even though turning operation switch to "ON."

The display shown right will appear on the indoor unit remote controller for about 5 minutes when the main power source is turned on.

Drain pump does not stop while the operation is stopped.

Drain pump runs even during unit stopping.

"COOL (HEAT)"

blinking display

Normal display

Defrosting

Extinguished

Preparing heating

"HO" blinking display

Extinguished

- 85 -

[6] Symptoms that do not Signify Problems

Page 88

Items

Outdoor unit

PUHY-P700YSGM-A PUHY-P750YSGM-A PUHY-P800YSGM-A

Ambient temp.

Indoor

DB/WB

Outdoor

Quantity

Set

Indoor unit Quantity in operation

Condition

Model –

Main pipe

Unit connecting pipe

Piping Comp. unit ~ Hex. unit

Piping Comp. unit ~ Indoor unit

Branch pipe

Total piping length

Indoor unit fan notch –

Refrigerant volume kg

Outdoor

Total current A

unit

Vo Vlts

LEV

Indoor unit

Pulse

opening

SC (LEV1)

Pressure

High pressure(after O/S) /Low pressure(before accumulator)

MPa

Discharge (TH11/TH12)

Heat exchanger outlet (TH5)

Accumulator

Inlet

Comp. unit

Hex. unit

Outlet

Sectional

Suction (Compressor)

˚C

temp

Shell bottom (Compressor) (TH10)

SCC outlet (TH7)

Bypass outlet (TH8)

Indoor

LEV inlet

unit

Heat exchanger outlet

Heat exchanger outlet (TH5)

27.0/19.0

35.0/24.0

250 200 125 100 25 250 250 125 100 25 250 250 140 125 25

388 324 387 325 222 388 388 387 325 222 388 388 373 387 222

27.0/19.0

35.0/24.0

27.0/19.0

35.0/24.0

0.5

2.5

20.5

0.5

2.5

20.5

0.5

2.5

20.5

33.5 34.5 34.5

Compressor frequency (No.1, No.2) Hz

36.6/33.5 42.0/38.4 45.1/41.3

380/415 380/415380/415

168 183 201

89/89 97/97 104/104

3.01/0.80 3.10/0.77 3.13/0.73

81/81 85/85 88/88

49 49 49

665

10/10 10/10 9/9

34/34 37/37 40/40

30 31 32

654

48 49 49

29 29 30

11 11 11

- 86 -

[7] Standard Operation Data (Reference Data)

1. Cooling operation

Page 89

Items

Outdoor unit

PUHY-P700YSGM-A PUHY-P750YSGM-A PUHY-P800YSGM-A

Ambient temp.

Indoor

DB/WB

Outdoor

Quantity

Set

Indoor unit Quantity in operation

Condition

Model –

Main pipe

Branch pipe

Total piping length

Indoor unit fan notch –

Refrigerant volume kg

Outdoor

Total current A

unit

Vo Vlts

LEV

Indoor unit

Pulse

opening

SC (LEV1)

Pressure

High pressure(after O/S) /Low pressure(before accumulator)

MPa

Discharge (TH11, TH12)

(TH10)

Heat exchanger outlet (TH5)

Accumulator

Inlet

Comp. unit

Outlet

Sectional

Suction (Compressor)

temp

Shell bottom (Compressor)

Indoor unit

LEV inlet

Heat exchanger outlet

20.0/-

7.0/6.0

20.0/-

7.0/6.0

20.0/-

7.0/6.0

0.5

2.5

20.5

0.5

2.5

20.5

0.5

2.5

20.5

33.5 34.5 34.5

Compressor frequency (No.1, No.2) Hz

36.8/33.7 42.8/39.2 45.4/41.5

380/415 380/415380/415

---

95/95 101/101 105/105

2.70/0.64 2.78/0.63 2.86/0.61

80/80 84/84 88/88

000

-3 -3 -3

-2 -3 -4

-2/-2 -3/-3 -4/-4

29/29 30/30 31/31

35 37 39

000

76 80 84

400 332 406 332 229 400 400 406 332 229 400 400 384 406 229

250 200 125 100 25 250 250 125 100 25 250 250 140 125 25

Hex. unit

Heat exchanger outlet (TH5)

Unit connecting pipe

Piping Comp. unit ~ Hex. unit

Piping Comp. unit ~ Indoor unit

˚C

- 87 -

2. Heating operation

Page 90

- 88 -

0403

(Note1)

Serial transmission abnormality

0900 Test run (LC)

1102 Discharge temperature abnormality (Comp. unit)

1301 Low pressure abnormality (Comp. unit)

1302 High pressure abnormality (Comp. unit)

1500 Overcharged refrigerant abnormality

2500 Leakage (water) abnormality (IC)

2502 Drain pump abnormality (IC)

2503

2600

2601

Drain sensor abnormality (IC, LC)

Water leakage (LC)

Water-supply cut (LC)

4103

4106

Reverse phase abnormality (Comp. unit)

Blackout (Hex. unit)

4115 Power supply sync signal abnormality (Comp. unit)

4116 Fan speed abnormality (motor abnormality) (IC, LC)

4220

4222

4225

(Note1)

[108] Bus Voltage drop abnormality (S/W detect)

[109]

[01]

Bus Voltage rise abnormality (S/W detect)

[110] Bus Voltage abnormality (H/W detect) (Comp. unit)

[111] Logic error

Heat sink overheat protection

4240 4242 4245

(Note1)

4230 4232 4235

(Note1)

Overload protection (Comp. unit)

4250

4252

[101] IPM abnormality

[102] ACCT overcurrent abnormality (H/W peak detect) (Comp. unit)

[103]

4255

(Note1)

DCCT overcurrent abnormality (H/W peak detect) (Comp. unit)

[104] IPM short/grounding abnormality

[105] Load short abnormality (Comp. unit)

[106] ACCT overcurrent abnormality (S/W detect peak current) (Comp. unit)

[107] ACCT overcurrent abnormality (S/W detect effective current) (Comp. unit)

4260 4262 4265

(Note1)

Cooling fan abnormality (Comp. unit)

5101

Air inlet (TH21:IC)

Open-air treatment inlet (TH4:LC)

Open-air treatment pipe (TH2:LC)

Open-air treatment gas pipe (TH3:LC)

Discharge (TH11, TH12:Comp. unit)

5102 Liquid pipe (TH22:IC)

5103 Gas pipe (TH23:IC)

Open-air temperature (TH24)

Open-air treatment open air (TH11)

5105

5104

Liquid pipe (TH5:Comp. unit, TH5b:Hex. unit)

5106 Ambient temperature (TH6:Comp. unit)

5107 SC coil outlet (TH7:Comp. unit)

5108 SC coil bypass outlet (TH8:Comp. unit)

Check code Check content

Thermal sensor abnormality

[ ] : Error detail No.

[02]

[05]

ªª

Troubleshooting

[1] Check Code List

1. Check Code List

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5301

5302

5305

[115] ACCT sensor abnormality (Comp. unit)

[116] DCCT sensor abnormality (Comp. unit)

[117]

(Note1)

ACCT sensor/circuit abnormality (Comp. unit)

[118] DCCT sensor/circuit abnormality (Comp. unit)

[119] IPM-open/ACCT connection abnormality (Comp. unit)

[120] ACCT miss-wiring abnormality (Comp. unit)

6600 Multiple address abnormality

Unset polarity

6602

6601

Transmission processor hardware abnormality

6603 Transmission circuit bus-busy abnormality

Check code Check content

6606 Communications with transmission processor abnormality

6607 No ACK abnormality

6608 No response abnormality

6831 MA Communication no reception error

6832 MA Communication synchronization recovery error

6833 MA Communication transmission/reception hardware error

6834 MA Communication start bit error

7100 Total capacity abnormality (Comp. unit)

7101 Capacity code abnormality

7102 Error in the number of connected units (Comp. unit)

7105 Address setting abnormality (Comp. unit)

7106 Characteristics setting abnormality (LC)

7110 Connection number setting abnormality (Comp. unit)

7111 Remote control sensor abnormality

7113 Functional restriction error (Comp. unit)

7130 Di

7117 Unset model error (Comp. unit)

7116 System error before flashing operation (Comp. unit)

(Note1) Compressor inverter and fan inverter are installed in these R410A series. When checking the check code or the 2-digit detail

code, refer to the last digit to confirm whether the error code is for the compressor or for the fan.

Example) Code 4225 → Bus voltage drop Error for fan inverter system Code 4250 → IPM / bus voltage fault Error for compressor inverter system (No.1) Code 4252 → IPM / bus voltage fault Error for compressor inverter system (No.2)

erent unit model error (Comp. unit)

The last digit Inverter address (system) Potential model

0 or 1 1 Compressor inverter system (No.1)

2 2 Compressor inverter system (No.2)

5 5 Fan inverter system

[02]

[05]

[01]

5110

(Note1)

Heat sink (THHS)

Compressor shell (TH10)

5201

5112

High pressure sensor abnormality (Comp. unit)

Thermal sensor abnormality

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The last digit Inverter address (system) Potential model

0 or 1 1 Compressor inverter system (No.1)

2 2 Compressor inverter system (No.2)

5 5 Fan inverter system

Harmonic control device abnormality

1202 (1102)

Preliminary discharge temperature abnormality or preliminary discharge thermal sensor abnormality (TH11, TH12)

1205 (5105) Preliminary liquid pipe temperature sensor abnormality (TH5)

Preliminary THHS sensor/circuit abnormality

1216 (5107) Preliminary sub-cool coil outlet thermal sensor abnormality (TH7)

1217 (5108) Preliminary sub-cool coil bypass outlet thermal sensor abnormality (TH8)

1221 (5106) Preliminary ambient temperature thermal sensor abnormality (TH6)

1243 (5112) Compressor shell temperature sensor preliminary abnormality (TH10)

1402 (1302) Preliminary high pressure abnormality or preliminary pressure sensor abnormality

1600 (1500)

4171 (4121)

Preliminary overcharged refrigerant abnormality

1605 Preliminary suction pressure abnormalit

Preliminary serial transmission abnormality

4300 (5301)

4302 (5302)

[115] Preliminary ACCT sensor abnormality

[116] Preliminary DCCT sensor abnormality

[117]

4305 (5305)

(Note1)

Preliminary ACCT sensor/circuit abnormality

[118] Preliminary DCCT sensor/circuit abnormality

[119] Preliminary IPM-open/ACCT connection abnormality

[120]

[02]

[05]

[00]

(Note1)

1214 (5110)

[02]

[05]

[01]

(Note1)

4300 (0403)

Preliminary ACCT miss-wiring abnormality

4320 (4220)

4322 (4222)

(Note1)

4325 (4225)

[108] Preliminary bus voltage drop abnormality (S/W detect)

[109] Preliminary bus voltage rise abnormality (S/W detect)

[110] Preliminary bus voltage abnormality (H/W detect)

[111] Preliminary logic circuit for H/W error detect abnormality

4330 (4230) 4332 (4232) 4335 (4235)

(Note1)

Preliminary heat sink overheating abnormality

4340 (4240) 4342 (4242) 4345 (4245)

(Note1)

Preliminary overload abnormality

4350 (4250)

4352 (4252)

4355 (4255)

[101] Preliminary IPM abnormality

[102] Preliminary ACCT overcurrent abnormality (H/W peak detect)

[103] Preliminary DCCT overcurrent abnormality (H/W peak detect)

[104] Preliminary IPM short/grounding abnormality

[105] Preliminary load short abnormality

[106] Preliminary ACCT overcurrent abnormality (S/W detect peak current)

[107] Preliminary ACCT overcurrent abnormality (S/W detect effective current)

Preliminary error code Preliminary error content

❉ Please refer to ( ) check code. [ ] : Error code No.

(Note1) Compressor inverter and fan inverter are installed in these R410A series. When checking the check code or the 2-digit detail

code, refer to the last digit to confirm whether the error code is for the compressor or for the fan.

2. Intermittent fault check code (only for outdoor unit)

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[2] Responding to Error Display on the Remote Controller

1. Mechanical problems

Checking code

0403

Meaning, detecting method Cause

Checking method & Countermeasure

Serial transmission abnormality

Serial transmission failure between the main board and the INV board, and between the main board and the FAN board.

Detail code 01:

Between the main board and the INV board

Detail code 05:

Between the main board and the FAN board

(1) Defective wiring. Check for wiring between the

main board connector CNRS3B and the INV board connector CNRS1 or between the main board connector CNRS3A and the FAN board connector CNRS2 or check for contact the connector. Check for contact of the connector CNAC3 on the main board or of the connector CNTR on the FAN board.

Serial transmission failure between the control board and the FAN board (Detail code: 05)

(1) Defective wiring. Check for wiring between the

control board and the FAN board or between the connectors.

(2) Inverter address switches

are set wrong.

Check the address of SW2-1 on the INV board. Check SW2-1 on the FAN board whether it is ON.

(2) Inverter address switches

are set wrong.

Check SW2-1 on the FAN board whether it is ON.

(4) Defective INV board.

Defective FAN board.

Replace the INV board or the FAN board when the power turns on automatically, even if the power is reset.

(4) Defective FAN board. Replace the FAN board when

the power turns on automatically, even if the power is reset.

(3) Transformer failure. Measure voltages between pins

1 and 3 of the FAN board connector CNTR.

(3) Transformer failure. Measure voltages between pins

1 and 3 of the FAN board connector CNTR.

Comp. unitHex. unit

✻ For the check code on the inverter, refer to “ 6. Inverter and compressor ” in the section [4] “ Troubleshooting of principal parts ”

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Checking code

1301

Meaning, detecting method Cause

Checking method & Countermeasure

Low pressure abnoramlity (Comp. unit)

When starting the compressor from Stop Mode for the first time (include the time when starting the compressor for the next time, when starting bound power, ending bound power or when the thermo turns off just after the remote controller is turned on), check the low-pressure sensor beforehand. If the sensor is 0.098MPa, stop the operation immediately after starting.

(1) Internal pressure is dropping

due to a gas leak.

(2) The low pressure pressure

sensor is defective. (3) Insulation is torn. (4) A pin is missing in the

connector, or there is faulty

contact. (5) A wire is disconnected. (6) The control board’s low

pressure pressure sensor

input circuit is defective.

Refer to the item on judging low pressure pressure sensor failure.

4. When 120˚C or more discharge is detected 30 or more minutes after previous stop of outdoor unit, the stop is regarded as the first time and the process shown in 1. is observed.

5. 30 minutes after stop of outdoor unit is intermittent fault check period with LED displayed.

(7) Gas leak between low and

high pressures. 4-way valve trouble, compressor trouble, solenoid valve SV1 trouble.

(8) Thermistor trouble

(TH11, TH12).

(9) Thermistor input circuit

trouble on control circuit board.

Check operation status of cooling-only or heating-only.

Check resistance of thermistor.

Check inlet temperature of sensor with LED monitor.

1102 Discharge

temperature abnormality (Comp. unit)

1. When 120˚C or more discharge temperature is detected during operations (the first time), outdoor unit stops once, mode is changed to restart mode after 3 minutes, then the outdoor unit restarts.

2. When 120 °C or higher discharge is detected again (the second time) within 30 minutes after the first stop of outdoor unit, mode is changed to restart mode after 3 minutes, then the outdoor unit restarts.

3. When 120˚C or more discharge is detected, again (the third time) within 30 minutes after previous stop of outdoor unit, emergency stop is observed with code No.“1102” displayed.

(1) Gas leak, gas shortage.

(2) Overload operations.

(3) Poor operations of indoor

LEV.

(4) Poor operations of OC

controller LEV1.

(5) Poor operations of ball valve.

(6) Outdoor unit fan block, motor

trouble, poor operations of fan controller Heating (Heating-only, Heating-main).

(3) ~ (6) : Rise in discharge temp. by low pressure drawing.

See Refrigerant amount check.

Check operating conditions and operation status of indoor/outdoor units.

Check operation status by actually performing cooling or heating operations.

Cooling : Indoor LEV (Cooling-only) LEV1

Heating : Indoor LEV (Heating-only)

See Trouble check of LEV and

solenoid valve.

Confirm that ball valve is fully opened.

Check outdoor fan. See Trouble check of outdoor

fan.

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Checking code Meaning, detecting method Cause

Checking method & Countermeasure

High pressure abnoramlity 2 (Comp. unit)

When pressure sensor detects

0.098MPa or less just before

starting of operation, error stop is observed with code No.“1302” displayed.

(1) Fall in internal pressure

caused by gas leak. (2) Pressure sensor trouble. (3) Film breakage. (4)

Coming off of pin in connector

portion, poor contact. (5) Broken wire. (6) Pressure sensor input circuit

trouble on control circuit

board.

See Trouble check of pressure

sensor.

(14) Control circuit board

thermistor trouble, pressure sensor input circuit trouble.

(15) Thermistor mounting failure

(TH5, TH6)

(16) No connector for pressure

switch (63H), disconnected wire.

(17) Fuse melting on the control

board (F01 or F02).

Check inlet temperature and pressure of sensor with LED monitor.

Check whether the fuse melts. Check whether the actuator for the cooling FAN (MF), the 4-way valve or the solenoid valve is not short-circuited and broken.

1302 High pressure

abnoramlity 1 (Comp. unit)

1. When pressure sensor detects 3.87MPa or more during operations (the first time), outdoor unit stops once, mode is changed to restart mode after 3 minutes, then the outdoor unit restarts.

2. When a pressure of 3.87MPa or more is detected again (the second time) within 30 minutes after first stop of outdoor unit, mode is changed to restart mode after 3 minutes, then the outdoor unit restarts.

3. When 3.87MPa or more pressure is detected again (the third time) within 30 minutes after stop of outdoor unit, error stop is observed with code No. “1302” displayed.

4. When 3.87MPa or more pressure is detected 30 or more minutes after stop of outdoor unit, the detection is regarded as the first time and the process shown in 1. is observed.

5. 30 minutes after stop of outdoor unit is intermittent fault check period with LED displayed.

6. Error stop is observed immediately when pressure switch (4.15 MPa) operates in addition to pressure sensor.

(1) Poor operations of indoor

LEV → Heating

(2) Poor operations of ball valve.

(3) Short cycle of indoor unit. (4) Clogging of indoor unit filter. (5) Fall in air volume caused by

dust on indoor unit fan.

(6) Dust on indoor unit heat

exchanger.

(7) Indoor unit fan block, motor

trouble.

(2)~(7) : Rise in high pressure caused by lowered condensing capacity in heating-only and heating-main operation.

(8) Short cycle of outdoor unit. (9) Dust on outdoor unit heat

exchanger.

(10) Outdoor unit fan block,

motor trouble, poor

operations of fan controller. (8)~(10) : Rise in high pressure caused by lowered condensing capacity in cooling-only and cooling-main operation.

(11) Poor operations of solenoid

valves SV1 (Bypass valves

(SV1) can not control rise

in high pressure).

(12) Thermistor trouble

(TH5, TH6).

(13) Pressure sensor trouble.

Check operations status by actually performing cooling or heating operations.

Heating : Indoor LEV

See Trouble check of LEV and

solenoid valve.

Confirm that ball valve is fully opened.

Check indoor unit and take measures to trouble.

Check outdoor unit and take measures to trouble.

Check outdoor unit fan See Trouble check of outdoor

unit fan.

See Trouble check of solenoid valve.

Check resistance of thermistor.

Check Trouble check of

pressure sensor.

-1.5

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Checking code

2502

Meaning, detecting method Cause

Checking method & Countermeasure

Drain pump abnormality

(This error

occurs only for the applied indoor units.)

When drain sensor detects flooding during drain pump ON.

(1) Drain pump malfunction

(2) Clogged drain pump intake

(3) Clogged drain pipe

(4) Return water from drain pipe

(installation defect)

(1) Check the drain pump

malfunction

1Check whether there is

water in the drain pan.

When the water level is approximately 10mm from the bottom of the drain pan, the drain pump may be normal.

2Check whether the drain

pump operates properly.

Whether the resistance of the drain pump is normal or the drain pump operates when the power supply is applied.

1500 Overcharged

refrigerant abnormality (Comp. unit)

2500 Leakage

(water) abnormality

When drain sensor detects flooding during drain pump OFF.

(1) Water leak due to humidifier

or the like in trouble.

Check water leaking of humidifier and clogging of drain pan.

(1) Excessive refrigerant

charge.

(2) Main circuit board thermistor input circuit trouble.

(3) Thermistor mounting trouble (TH11, TH12, TH10).

Refer to the section on judging the refrigerant volume.

Check the sensor detection temperature and pressure with the LED monitor.

1. If the discharge SH 10K is detected during operation (at first detection), the outdoor unit stops at once. The 3 minutes restart prevention mode is entered. After three minutes, the outdoor unit starts up again.

2. If the discharge SH 10K is detected again within 30 minutes after the outdoor unit stops (second detection), an abnormal stop is applied, and

“1500” is displayed.

3. If discharge SH 10K is detected more than 30 minutes after the outdoor unit stops, the state is the same as the first detection and the same operation as 1. above takes place.

4. The abnormal stop delay period is in effect for 30 minutes after the outdoor unit stops. The abnormal stop delay period LED turns ON during this time.

The compressor shell temperature super heat (TH10-Te) detects an error.

If the sell temperature SH 10K is detected for 10 minutes in a row within 30 minutes after the compressor starts, the outdoor unit stops at once. The 3 minutes restart prevention mode is entered.

If the sell temperature SH 10K is detected again for 10 minutes in a row within 2 hours

after the outdoor unit stops, an

abnormal stop is applied, and

“1500” is displayed.

3. The abnormal stop delay period is in effect for 2 hours after the outdoor unit stops. The abnormal stop delay period LED turns ON during this time.

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Checking code

2502

Meaning, detecting method Cause

Checking method & Countermeasure

Drain pump abnormality (This error

occurs for all the indoor units in the same refrigerant system.)

When drain sensor detects flooding during drain pump ON in the stopped indoor unit.

(1) Drain pump malfunction

(2) Clogged drain pump intake

(3) Clogged drain pipe

(4) Return water from drain pipe

(installation defect)

Refer to the previous page.

Reset the power of the applied indoor unit. However, the reset (error reset) using the remote controller can be done in 10 minutes after the power has been reset. Furthermore, the reset using the remote controller is required for all the indoor units.

2503 Drain sensor

abnormality

When short circuit or open circuit is detected during operation (cannot be detected during OFF).

Short circuit:

detected 90

˚C or more

Open circuit:

detected –20˚C or less

(1) Thermistor failure

(2) Connector contact failure

(Insert failure)

(3) Disconnected wire or partial

disconnected wire for thermistor

(4) Indoor board (detection

circuit) failure

Thermistor resistance check

0˚C : 6.0kΩ 10˚C : 3.9kΩ 20˚C : 2.6kΩ 30˚C : 1.8kΩ 40˚C : 1.3kΩ

Connector contact failure If no fault is found, indoor board is faulty.

(2) Check the clogged drain

pump intake. Check whether there is no dust around the drain pump intake.

(3) Check the clogged drain pipe.

Check whether there is no clogging outside of the pipe body.

(4) Check the return water.

Pour approximately 1-liter water in the drain pump, and start the drain pump. When the water level in the drain pan becomes stably lower, stop the pump, and check the amount of the return water to the drain pan.

✻When a large amount of

water returns, the gradient of drain pipe may be the reason. Check whether the drain pipe is installed properly as the instruction in the installation manual says. Furthermore, check whether the gradient of the unit installation is horizontal. Error may be detected because of the return water depending on the gradient. (Gradient approximately 0.5

˚)

After checking the above, when all normal, misdetection of the drain sensor is possible. 1Check the drain sensor.

· Check the resistance value.

Reset (error reset) the applied indoor unit with the remote controller.

Drain pump abnormality

(This error

occurs only for the applied indoor units.)

When drain sensor detects flooding during drain pump ON.

(1) Drain pump malfunction

(2) Clogged drain pump intake

(3) Clogged drain pipe

(4) Return water from drain pipe

(installation defect)

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Checking code Meaning, detecting method Cause

Checking method & Countermeasure

4106 Blackout

(Hex. unit)

The operation cannot be started because the power of the Hex. unit is blocked off.

(1) Faulty power supply wiring

(The power of the Hex. unit is blocked off.)

(2) Blown fuse of the control

board (F901)

(3) Transformer (T01) failure

(4) Control board failure

1Check the voltage of the power

supply terminal block (TB1).

2Check the voltage of CND

(between 1 and 3) of the control board.

3Check whether the fuse is not

blown.

4Check the voltage (AC18-29V)

of CN3T (between 1 and 3) of the control board.

If the above faults 1~4 are not found, replace the control board.

4103 Reverse

phase abnormality (Comp. unit)

2. When turning on the power, the operation cannot be started because of the open phase of one of the power lines (L1 or L2).

1. The operation cannot be started because of the reserve phase of one of the power lines (L1, L2 or L3).

(1) Power supply failure

a) Open phase of power

supply voltage

b) Power supply voltage drop

(2) Faulty wiring

Between the power supply terminal block (TB1) and the main boards (CN20 and 21)

(3) Blown fuse

(4) Main board failure

(1) Faulty wiring

(2) Main board failure

Check the input resistance of the power supply terminal block (TB1).

· Check the voltage of No.5 pin of the main board connector (CN20) and the voltage between No.1 and 3 pin of CN21.

· If the voltage is not the same as the power supply voltage, the wiring is faulty.

Check whether the fuses of the main board (both F01 and F02) are not blown.

If the above faults are not found, the main board is faulty.

· Check whether the phase of the power supply terminal block (TB1) is normal.

· Check the wiring between the power supply terminal block (TB1) and the main boards (CN20 and CN21).

If the above faults are not found, the main board is faulty.

CN20 5 Pin

CN21 3 Pin

CN21 1 Pin

TB1

2601 Water-supply

cut

(1) Water is not supplied into the

humidification feed tank.

Check the amount of supply water. Check the solenoid valve or connection.

(2) The solenoid valve for

humidification is OFF.

Check the connector.

(3) Float switch disconnection. Check the connecting part.

(4) Float switch malfunction. Check the defective float switch.

(5) Freeze on the feed tank. Defrost by turning the power off

and turn the power on again.

2600 Water

leakage

–

Water leaks from the pipes in such as the humidifier.

Check the place from where the water leaks.

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Checking code

4115

Meaning, detecting method Cause

Checking method & Countermeasure

Power supply sync signal abnormality (Comp. unit)

The frequency cannot be determined when the power is switched on. (The power supply’s frequency cannot be detected. The outdoor fan cannot be controlled by phase control.)

(1) There is an open phase in

the power supply.

(2) A fuse is defective.

(3) Faulty wiring.

(4) The circuit board is defective.

Check before the breaker, after the breaker or at the power supply terminal blocks TB1, and if there is an open phase, correct the connections.

If F01 or F02 on the MAIN board is melted, (Resistance between both ends of the fuse is ∞), replace the fuses.

Check voltage between the pin-5 on the main board connector (CN20), between the pin-1 and the pin-3 on CN21. When the voltage is not the same as the power source voltage (380-415V), the wiring is faulty.

If none of the items in (1) to (3) is applicable, and if the trouble reappears even after the power is switched on again, replace the MAIN board (when replacing the circuit board, be sure to connect all the connectors, ground wires, etc. securely).

4116

Fan speed abnormality (motor abnormality)

[ LOSSNAY ]

1. The motor keep running even if the power is OFF.

2. The thermal overload relay is ON. (Only for the three-phase model)

[ Indoor unit ]

If detected less than 180rpm or more than 2000rpm, the indoor unit will restart and keep running for 3 minutes. If detected again, the display will appear.

(1) Defective board.

(2) Motor malfunction.

(3) Solenoid switch malfunction.

Replace the board.

Check for the motor and the solenoid switch.

4220 4222 4225

Bus voltage drop abnormality (Error details No.108)

If Vdc 289V is detected during operation. (Software detection)

(1) Power environment.

(2) Voltage drop detected.

Check whether the unit makes an instantaneous stop when the detection result is abnormal or a power failure occurs. Check whether the power voltage 342V across all phases.

Check the voltage of the connector (CNDC2) on the INV board.

→

Replace the INV board when

there is no voltage drop.

→

Check the followings when

there is a voltage drop.

1Check the voltage of CN52C

on the main board

→

Refer to (3)

2Check whether 52C1 works

normally → Refer to (4) Or check 52C1-connecting piping.

3Check for the diode stack

→

Refer to (5)

4Check for the wiring and the

connectors between the CNDC2 on the INV board and the CNDC1 on the G/A board.

Replace G/A board when no fault is found for the above 1~4.

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Checking code

4220 4222 4225

Meaning, detecting method Cause

Checking method & Countermeasure

Bus voltage drop abnormality (Error details No.108)

(2) Voltage drop detected. <In the case of 4225>

Check the followings

1Check the voltage of

CN52C on the main board

→

Refer to (3).

2Check whether 52C1 works

normally → Refer to (4) Or check 52C1-connecting piping.

3Check for the diode stack

→

Refer to (5)

4Check for the wiring and the

connectors of the CNVDC

on the FAN board. Replace FAN board when no fault is found for the above

~4.

1Check the voltage of 52F on

the control board.

If not applied, the fuse is

blown.

2Check whether 52C1 works

normally → Refer to (4) or

check 52F-connecting

piping.

3Check for the diode stack.

→

Refer to (5).

4Check for the wiring and the

connectors of the CNVDC

on the FAN board. Replace FAN board when no fault is found for the above 1~4.

(3) Main board failure.

Check whether AC220~240V is applied to the connector (CN52C) during inverter operation.

→

If not applied, check the main board and the fuse (F01 and F02). Replace the main board when no fault is found.

(4) 52C1 failure.

52F failure.

Refer to 9.[4].6.(2) Check the coil resistance check. (52C1, 52F)

(5) Diode stack failure.

Refer to

9.[4].6.(2)

Check the diode stack resistance.

If Vdc 289V is detected during operation. (Software detection)

Bus voltage rise abnormality (Error details No.109)

(1) Different voltage connection. Check the voltage of the power-

supply terminal block (TB1).

(2) INV board failure.

Replace INV board if no fault is found. In the case of 4220: INV board (No.1) In the case of 4222: INV board (No.2) In the case of 4225: FAN board

If Vdc 817V is detected during inverter operation.

Bus Voltage abnormality

(Error details No.110) (Comp. unit)

(1) Same as detail code No.108

and 109 of 4220 error.

Same as detail code No.108 and 109 of 4220 error.

Bus voltage abnormality If Vdc 772V or Vdc 308V is detected. (H/W detection)

Logic error (Error details No.111)

(1) External noise. (2)

INV board failure. (3) G/A board failure. (4) IPM failure. (5) DCC failure.

Refer to 9.[4].6.(2).[5] Replace G/A board. Refer to 9.[4].6.(2).[1] Replace DCCT.

If only the H/W error logic circuit operates, and no identifiable error is detected.

(1) External noise. (2) FAN board failure.

Refer to 9.[4].6.(2).[7]

Hex. unit Comp. unit

✻ For the check code on the inverter, refer to “ 6. Inverter and compressor ” in the section [4] “ Troubleshooting of principal parts ”