Mitsubishi HWE04170 Service Manual

Download

Page 1

Models PUHY-P850, P900, P950, P1000YSGM-A

PUHY-P1050, P1100, P1150, P1200, P1250YSGM-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 T est

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

[8] V acuuming.............................................................................. 13

[9] V acuum 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] Restrictions on System Structure .......................................... 18

[2] Electrical Work & M-NET control............................................ 19

[3] Types of Switch Setting and Address Setting ........................ 20

[4] Examples of system connection ............................................ 23

[5] Restrictions on Refrigerant Piping Length.............................. 39

3 Components of the Outdoor Unit ................................................ 40

[1] Appearance of the Components and Refrigerant Circuit........ 40

[2] Control Box ............................................................................ 44

[3] Circuit Board .......................................................................... 45

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 Diagr am ............................................................ 55

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

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

6 Refrigerant Circuit........................................................................ 57

[1] Refrigerant Circuit Diagram.................................................... 57

[2] Functions of Principal Parts .................................................... 58

7 Control.......................................................................................... 61

[1] Dip Switch Functions and Their Factory Settings .................. 61

[2] Controlling the Outdoor Unit .................................................. 66

[3] Operation Flow Chart ............................................................ 76

8 Test Run ...................................................................................... 81

[1] Check Items before Test Run.................................................. 81

[2] Test Run Method .................................................................... 81

[3] Operating Characteristics and Refrigerant Amount................ 82

[4] Adjustment and Judgment of Refrigerant Amount ................ 82

[5] Refrigerant Volume Adjustment Mode Operation .................. 84

[6] Symptoms that do not Signify Problems ................................ 86

[7]

Standard Operation Data (Reference Data)

.............................. 87

9 Troubleshooting............................................................................ 93

[1] Check Code List .................................................................... 93

[2] Responding to Error Display on the Remote Controller ........ 97

[3] Investigation of Transmission Wave Shape/Noise.................. 130

[4] Troubleshooting of Principal Parts .......................................... 133

[5] Refrigerant Leak .................................................................... 149

[6] Compressor Replacement Instructions .................................. 151

[7] Collecting the Cooling Liquid from the Accumulator .............. 152

0 LED display.................................................................................. 153

[1] LED Monitor Display .............................................................. 153

Page 3

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.

- 1 -

Page 4

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.

- 2 -

Page 5

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.

- 3 -

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.

- 4 -

Page 7

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.

- 5 -

Page 8

- 6 -

¡¡

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 dr yers 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 dr yer 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 par ticles, 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.

Page 9

- 7 -

[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.

Page 10

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.

- 8 -

[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.

Page 11

- 9 -

“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.

Page 12

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.

- 10 -

[4] Storage of Piping Material

1. Storage location

2. Pipe sealing before storage

Page 13

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.

- 11 -

[5] Piping Machining

Page 14

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 hyg roscopic 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.

- 12 -

[6] Brazing

Page 15

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 v alve is required to prevent the v acuum 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.

- 13 -

[7] Airtightness Test

[8] Vacuuming

Page 16

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 wellmaintained 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

- 14 -

[9] Vacuum Drying

Page 17

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

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].

- 15 -

[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 refr igerant 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

- 18 -

™™

Restrictions

[1] Restrictions on System Structure

1. Indoor unit combination

Outdoor unit

model

The indoor unit model that can be connected to this unit is shown below.

Connectable

indoor unit model

total capacity

Number of

connectable

indoor units

Connectable

unit model

P850 type

425

~1105

450~1170

475~1235

500~1300

525~1365

550~1430

575~1495

600~1560

625~1625

P20~P500 type

Indoor units of

R410A series

P900 type

P950 type

P1000 type

P1050 type

P1100 type

P1150 type

P1200 type

P1250 type

~42 units

Notes:

Connectable indoor unit model total capacity is the total sum of the numbers of the indoor unit model.

2. When the connectable indoor unit model total capacity exceeds the outdoor unit capacity, performance of each

indoor unit will be lower than the rated performance during simultaneous operation of indoor and outdoor units. Select indoor units within the capacity of the outdoor unit.

Units in the system

Main unit Sub unit

PUHY-P450YMM-A

PUHY-P400YSM-A Main unit Sub unit

PUHY-P500YMM-A

PUHY-P400YSM-A Main unit Sub unit

PUHY-P550YMM-A

PUHY-P400YSM-A Main unit Sub unit

PUHY-P600YMM-A

PUHY-P400YSM-A Main unit Sub unit

PUHY-P650YMM-A

PUHY-P400YSM-A Main unit Sub unit

PUHY-P450YMM-A

PUHY-P650YSM-A Main unit Sub unit

PUHY-P500YMM-A

PUHY-P650YSM-A Main unit Sub unit

PUHY-P550YMM-A

PUHY-P650YSM-A Main unit Sub unit

PUHY-P600YMM-A

PUHY-P650YSM-A

Page 21

- 19 -

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.

[2] Electrical Work & M-NET control

1. Attention

2. Types of control cable

Page 22

101

Main

201 201 201 202

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)

0, 52~100

(Note 3, 4)

201~250 201~250 201~250 201~250

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.

6. In case of P700~P800YSGM-A, the compressor unit and the heat exchange unit exist. In case of P850~P1250YSGM-A, the main unit and the sub unit exist.

7. Only in case of R2 system, the BC controller exits.

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

Sub 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.

- 20 -

[3] Types of Switch Setting and Address Setting

1. Switch setting

2. Address setting

Page 23

- 21 -

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 OC

OC : Main unit, OS : Sub unit

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 24

- 22 -

CN51

CN3D

CN3S

Remote control board

Power supply for lamp

Outdoor unit control board (Note2)

Relay circuit

Remote control board

Outdoor unit control board

Relay circuit

Wire length may be extended

to the maximum of 10m.

Wire length may be extended

to the maximum of 10m.

Wire length may be extended

to the maximum of 10m.

Adapter for

external output

Orange 3

Yellow 4

Green 5

Red 3

Brown 2

Orange 1

Red 3

Brown 2

Orange 1

Adapter for

external output

Adapter for

external input

CN51

CN3D

X Y

L1 : Error display lamp L2 : Compressor operation lamp X,Y : Relay (coil specification 0.9W or less for DC12V)

SW1 : Night mode command or demand command SW2 : Demand command X,Y : Relay (Contact specification DC1mA)

X : Snow sensor (Contact specification DC1mA)

Snow sensor

Insulation

CN3S

L1 L2

SW1

SW2

CN3D 1-2P

CN3D 1-3P

Not

supplied

Outdoor unit control board

Not

supplied

Power supply for relay

Not

supplied

NO OK

1In case of 5~32HP

100% (Without demand)

0% 50%

75%

ShortOpen

When 4-step demand is performed, the following must be noted. (Example) When changing from 100% to 50%

Changing steps for demand control

(False) 100% → 0% → 50% (Correct)100% → 75% → 50%

When the erroneous changing is performed specified above, the thermo may be turned off. The demand percentage indicates the estimated compressor capacity. It is not always the same as the performance percentage. When this function is selected, night mode cannot be performed in conjunction.

SW4-7 : ON (4-step demand)

CN3D 1-3P Demand

OFF

CN3D 1-2P Night mode

OFF

Open Short

SW4-7 : OFF (Demand, Night mode)

2In case of 34~50HP

Open 100%

50% 88% 75%

Short

50%

0% 38% 25%

Open

88% 38% 75% 63%

Short

75% 25% 63% 50%

SW4-7 : ON (8-step demand)

1-2P

1-3P

OC side

CN3D

8-step demand

OS side CN3D

Short

Open

Short

Open

Short

Open

ShortOpen

Page 25

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

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 LOSSNA

6. For the system of 34 ~ 50HP, please refer to 1.(6).

Y 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

≤ ≤

≤ ≤ ≤

❉ OS exists only on Type P700~P800YSGM-A.

M1M2

TB3

TB7

TB3

(00)

M1M2 M1M2M1M2

- 23 -

[4] Examples of system connection

1. System using MA remote controller

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

Page 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) ❉ 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

Not required – 00

1 Indoor unit

Sub unit IC

2 LOSSNAY LC Not required –

MA remote

Main uni

Sub unit

t MA Not required –

Main

controller

Sub unit

Main unit

MA Sub unit

4OC

Not required –

5OS

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

Set with main/sub selector switch.

Outdoor unit

- 24 -

Page 27

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 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. 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

TB3

TB7

(52)

TB3

M1M2 M1M2

4. For the system of 34 ~ 50HP, please refer to 1.(6).

❉ OS exists only on Type P700~P800YSGM-A.

- 25 -

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 28

- 26 -

1 Indoor unit

2 LOSSNAY

MA remote controller

Main

unit

Sub unit

Main uni

Sub uni

Main

unit

Sub unit

01 ~ 50

Not required

Sub unit

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.

5OSOutdoor 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

Outdoor unit

Page 29

- 27 -

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 in door 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 M1M2M1M2

M1M2

M1M2 M1M2

7. For the system of 34 ~ 50HP, please refer to 1.(6).

❉ OS exists only on Type P700~P800YSGM-A.

1. System using MA remote controller

(3) In the case of different refrigerant grouping operation

Page 30

- 28 -

Wiring method • Address setting method

a. Indoor/outdoor transmission line

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

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

Outdoor unit

Main unit

Sub unit

Main uni

5OS

Outdoor 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

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 in door 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

7. For the system of 34 ~ 50HP, please refer to 1.(6).

❉ OS exists only on Type P700~P800YSGM-A.

1. System using MA remote controller

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

Page 32

- 30 -

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

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

Outdoor unit

51 ~ 100

Sub

unit

Main unit

5OS

Outdoor unit address + 1

Page 33

- 31 -

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 in door 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, the 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

9. For the system of 34 ~ 50HP, please refer to 1.(6).

❉ OS exists only on Type P700~P800YSGM-A.

1. System using MA remote controller

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

Page 34

- 32 -

Wiring method • Address setting method

a. Indoor/outdoor transmission line

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

Connection of shielded wire:

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

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

Sub

unit

Main unit

5OS

Outdoor unit address + 1

Outdoor unit

Page 35

- 33 -

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 in door 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 –

Notes:

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

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

4. Replacement of the power supply selecting connector (CN41) with (CN40) should be done on the system unit. When connecting a system controller or grouping the units in different refrigerant systems, replacement should be done on only on one unit in the system. (When 34~50HP models exist in the same system, replacement of the power supply selecting connector should be done on 34~50HP system units.)

Grounding work is required for shield earth (S-terminal) of the centralized control transmission block (TB7) on the system unit whose power supply selecting connector has been replaced.

Leave CN41 as it is. Leave SW2-1 as OFF.

CN41→CN40 Replace SW2-1 OFF→ON

Leave CN41 as it is. SW2-1 OFF→ON

Note 1

Note 2

a. Indoor/outdoor transmission line

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

b. Centralized control transmission line

Farthest length via outdoor unit (1.25mm

or more)

L32 + L31 + L1 + L2 + L3 + L4 500m

≤ ≤

≤

L32 + L21 + L22 + L23 + L24 500m

≤

L1 + L2 + L3 + L4 + L31 + L21 + L22 + L23 + L24 500m

≤

c. MA remote controller wiring

Total length (0.3 ~ 1.25mm2) m1 200m m2 + m3 200m

≤ ≤

TB5STB

A1 B2

TB5

S 12

TB5STB

0403

TB5

A1 B2

L3 L4

L23 L24

System controller

L21

TB3

TB7

TB3

TB7

L31

L32

L22

TB3

TB7

TB3

TB7

M1M2 M1M2 M1M2

M1M2M1M2M1M2M1M2

M1M2

1. System using MA remote controller

(6)

In the case of connecting system controller to centralized control transmission line (Applicable models 34~50HP)

Page 36

Wiring method • Address setting method

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

e. Switch setting

Address setting is required as listed below.

1 Indoor unit

2 LOSSNAY

MA remote controller

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 primary unit.

Set to the primary unit address within a same group in serial order. [Main

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

Set any address after setting al

indoor units.

–

Set by the main/sub selector switch.

The lowest address of indoor unit within refrigerant system + 50

Main

❉ 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 and OC. Connect Sterminal of the terminal block (TB7) on one OC with (CN40) connected to the earth screw ( ) of the electrical parts box.

Outdoor unit (Main unit)

Outdoor auxiliary unit (Sub unit)

a. Indoor/outdoor transmission line

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

❉ Make sure 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

Apply jumper wiring between M1, M2 terminals of centralized control transmission line terminal blocks (TB7) on the system unit (OC) and that A, B terminals of centralized control transmission line terminal blocks (TB7) on the sub unit (OS). On one OC only, replace the power selecting connector (CN41) with (CN40). (Leave CN41 as it is on OS.) Set the centralized control switch (SW2-1) on the MAIN board of all OC.

(TB3) on the outdoor unit [main unit (OC)] and that of indoor/outdoor transmission line terminal block (TB5) on each indoor unit (IC). (with non-polarity two wires)

51 ~ 100

52 ~ 100

Main

unit

5OS

Outdoor unit (system unit) address + 1

- 34 -

Page 37

- 35 -

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 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

Total length (0.3 ~ 1.25mm2)

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

Note 2. When the wire length exceeds 10m, the diameter

must be 1.25mm , and the length must be shorter than that of <a. indoor-outdoor transmission line>.

remote controller, employ wire with a diameter of 0.75 ~ 1.25mm

m1 10m

≤

2. System Using the M-NET Remote Controller

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

Page 38

- 36 -

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

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

Main unit

Sub unit5OSOutdoor unit address + 1

Outdoor unit

Page 39

- 37 -

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 in door 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 40

- 38 -

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 uni

Sub unit

Main unit

OS Outdoor unit address + 15

Page 41

- 39 -

1. Line branching system

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.

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

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.

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.

Sub unit - Main unit

A+B Less than 4m

Total piping length

A+B+C+D+E+F+G+I

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

Less than 300m

Allowable length

Farthest piping length (L) A(B)+C+G+I+J+i Farthest piping length after first branch ( )

Oil balance pipe

G+I+J+i Less than 40m

Less than 50m

(When the outdoor unit is below, less than 40m)

Indoor - Indoor height difference h1

Sub unit - Main unit height difference h2

Less than 15m

Less than 0.1m

Less than 150m

Oil piping length Less than 4m (Equivalent length:less than 5m) Oil piping height Less than 0.1m

Allowable height difference

Indoor - Outdoor height difference

To downstream unit

First branch

(Note2)

Indoor Indoor Indoor Indoor

Sub unit

Liquid distributor Gas distributor

Main unit

B (Note1)

CDEF

GI J

Liquid pipe (Main pipe) C

Gas pipe (Main pipe) C

Liquid pipe B

Gas pipe B

Gas pipe A

Gas distributor (Built-in on the unit)

Liquid distributor

Liquid pipe A

Oil balance pipe K

Main unitSub unit

indicates piping connection.

(Note) The total model names downstream in

the table below represent that viewed from C-point in the above figure.

(Note1) As the gas distributor is built in on the main unit, B has only the liquid pipe. (Note2) Make sure to use CMY-Y302-D for the first branch.

[5] Restrictions on Refrigerant Piping Length

Page 42

- 40 -

Fan guard

Heat exchanger

Fan guard

Heat exchanger

££

Components of the Outdoor Unit

[1] Appearance of the Components and Refrigerant Circuit

[ Front view of the unit (Main unit, Sub unit) ]

[ Rear view of the unit (Main unit, Sub unit ]

Page 43

- 41 -



Oil separator (No.1)

Commercial power supply compressor (No.2)

Oil separator (No.2)

Accumulator

Oil balance pipeInverter compressor

(No.1)

Pressure switch

4-way valve (21S4b)

4-way valve (21S4a)

4-way valve (21S4c)

High-pressure pressure sensor (63HS)

Low-pressure check joint

High-pressure check joint

2-way valve (SV5d)

2-way valve (SV5b)

2-way valve (SV5c)

Drier

Gas-side ball valve

Liquid-side ball valve

Linear expansion valve (LEV1)

Stop valve for oil balance

Service port for oil balance pipe (for vacuuming oil balance pipe)

[ Front view of the refrigerant circuit – Right (Main unit, sub unit) ]

[ Rear view of the refrigerant circuit – Left (Main unit) ]

Page 44

- 42 -

Gas distributor Stop valve for oil balance

4-way valve (21S4b)

4-way valve (21S4a)

Oil tank

4-way valve (21S4c)

2-way valve (SV5b)

2-way valve (SV5c)

Oil balance pipe

[ Front view of the refrigerant circuit – Right (Sub unit) ]

[ Rear view of the refrigerant circuit – Left (Main unit, sub unit) ]

Page 45

Accumulator

Oil balance pipe

Subcool coil

- 43 -

[ Rear view of the unit – Left (Main unit, sub unit) ]

Page 46

- 44 -

Power supply terminal block (TB1)

Transmission line terminal block for centralized control (TB7)

Indoor/outdoor transmission terminal block (TB3)

FILTER board

RELAY board

MAIN board

INV board

Choke coil (L1, L2)

Transformer

DCL (back)

Gate amp board

(G/A board)

FAN board

Diode stack

(DS)

Smoothing capacitor (C11, C12)

Rush current protection resistor (R11, R12)

Electromagnetic contactor (52C1)

Noise filter

Electromagnetic

contactor (52F)

Fuse

AC660V 50A

Electromagnetic

contactor (52C2)

Overcurrent

relay (51C2)

[ Appearance ]

[ Under the circuit board cover ]

[2] Control Box

Page 47

- 45 -

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 48

- 46 -

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 49

- 47 -

52C2, 52F, CH12 Power input (AC220

~240V)

51C2 Detection output

CNOUT2 Relay driving input

CNRT2

1–5

–

CNCH CH12 Power output

1–3

AC220~240V

CN51C2 51C2 contact input

CN52F 52F driving output

1–3

AC220~240V

CN52C2 52C2 drivingoutput

1–5

AC220~240V

4. Relay board

CNVDC DC bus voltage input

1–3

LED1

LED2

SW2

CNTRIPM (back)

CNINV Fan motor output Fuse CNRS2

3. FAN board

Page 50

- 48 -

CNFG CNL2CNL1

CNOUT Controlled source output

CNIN Controlled source input

5. Filter board

CNDR1

CN15V1

CNDC1 CNDC2

CNIPM1

6. G/A board

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)

< 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 REGISTRA TION”.

- Press and hold down the A [FIL TER] 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

T o 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

INDOOR UNIT

ADDRESS

INTERLOCKED

UNIT ADDRESS

PAR-F27MEA

TIMER SET

ON/OFF

FILTER

CHECK TEST

TEMP.

CLOCK ON OFF

T o 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 LOSSNA Y 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.

T o 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. <Registered>

- 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

T o 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)

T o 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 HEA TING 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] b uttons 1 are pressed and held do wn at the same time for two seconds, the remote controller switches to the remote controller function selection mode and the “OPERA TION MODE DISPLAY SELECTION MODE” windo w 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 s witches to the heat mode temperature selection windo w. “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 b y 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 LOSSNA Y address 30 as an e xample 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 LOSSNA Y 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 LOSSNA Y must be registered, go to step 1. Registration pr ocedure. If you w ant to confirm another LOSSNAY , go to step 2. Confirmation

procedure. To delete a registered LOSSNA Y, 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 -

< Symbol explanation >

NOTE:The broken lines indicate field wiring.

black

LD2

✻4

L1L2L3

red

white

black

red

white

blue

white

X01

black

white

red

white

red

yellow

red

orange

purple

black

gray

brown

white

L3L2L1

black

white

red

MC2

Maintenance

setting

Function

setting

Function setting

52F

21S

SV3

21S

SV1

shield

TH2

CN03

red

3 2 1

X04

✻3

123

MF2

Fan motor

(Heat exchanger)

UVWUV

MF1

MF3

Fan motor

(Heat exchanger)

191

1414

191

Compressor ON/OFF

NIGHT MODE

✻1

or STEP DEMAND

SNOW

T01

(Transformer)

CNTR

123

CNAC3

black

AUTO CHANGEOVER

HEAT/COOL

321

CN3N

blue

✻2

TH8

LEV1

1 2 3 4 5 6

CNLVB

red

63H2

63H1

12312

CN04

CN05

INDOOR/OUTDOOR

TRANSMISSION LINE

432

12345

CNRT1

red

CNOUT1

yellow

5 4 3 2 1

51C2

52C2

13 14

95 96

RELAY-BOARD

CNRT2

12345

CNOUT2

CH12

A2 A1

123

CN51C2

CN52C2

blue

CN52F

yellow

CNCH

blue

123

black

white

red

Motor

(Compressor)

52F

51C2

52C2

F12

AC660V

50A F

F11

AC660V

50A F

CN13

TH12

4 3 2 1

1234567

CNRS3B

CNINV

LED1 operation

LED2 error

65432

Trouble

Compressor ON/OFF

OFF

SW2

1234567

CNRS3A

1234567

CN3S

red

CNVCC1

CN51

CN3D

321

54321

SW1

321

12V

SW2SW3SW4

LD1

ONOFFOFF

ONOFF ONOFF OFF

SW5

Control circuit board

(MAIN BOARD)

10 10

SWU2

Address setting

SWU1

✻1

CN52C

yellow

CN38

green

CN36

CN35

red

CN33

X02

CN32

X01

X09

X08

X03

CNS2

blue

CNS1

blue

CH11

123

Z20

123

12312

12345

123456789

2 1 2 1 3 2 12 1 3 2 1 3 2 18 7 6 5 4 3 2 1

TH6

TH5TH7 TH11

63LS

R22

63HS

R23

1 2 3 1 2 3

CN02

CNTYP1

red

CNL

black

CN01

CNTYP4 CNH

CNTYP5

CN20

CN21

blue

F01

250VAC

6.3A T

F02

250VAC

6.3A T

1 2 3 4 5

1 2 3

L1L2L3

TB1

(Terminal Block)

Power source

3N~

380/400/415V

50/60Hz

black

red

52C1

DCL

red

1 2 3 4

(Diode stack)

DCCT

white

black

432

CNDC2

IPM

MC1

Gate amp board

(G/A BOARD)

ACCT

-W

ACCT

ACCT-U

X52

U V W

FAN control board

(FAN BOARD)

CNVDC

1 2 3

ACNF

(Noise Filter)

FILTER

BOARD

1234567

CNFG

blue

1 2

L1L2

1 2

CNL1CNL2

CNOUT

green

CNIN

blue

ZNR4

SWU3

012

12345

X05

CN34

red

X07

X06

CN15V1

CNDC1

black

CNDR1

123

1 2 3 4 5 6 7 8

CNVCC1

1 2 3 4 5

CNAC2

CNFAN

red

SW2SW1

1 41 6

OFF

LED1 operation

LED2 error

321

CNFG

blue

CNCT2

blue

4321123

CNTH

green

1 2

THHS1

1 2 3 4 5 6 7

1 2 3 4

CNCT

CNRS1

Power circuit board

(INV BOARD)

CNDC2

black

CN15V2

CNDR2

TB3

M1M2SM2M1

TB7

1 2 3

1 2

shield

F02

700VDC

2A T

red

white

black

blue

black white red

detection

circuit

detection

circuit

detection

circuit

red

white

black

blue

red

black

Motor

(Compressor)

F01

250VAC

2A T

Refer to the service handbook

about the switch operations.

CENTRAL CONTROL

TRANSMISSION LINE

CNRS2

1234567

Inverter controller box

)

~~~

SW5-8SW5-7

OFFOFF

OFFON

ONON

ACCT

AC Current Sensor

DCCT

DC Current Sensor

DCL

DC reactor (Power factor improvement)

52C1

Magnetic contactor (Inverter main circuit)

52C2

Magnetic contactor (No.2 Compressor)

51C2

Overload relay (No.2 Compressor)

PUHY-P450/500/550/600/650YGM-A

✻4

PUHY-P450/500/550/600/650YMM-A

–

PUHY-P400/650YSM-A

–

PUHY-P✻✻✻YGM-A

PUHY-P✻✻✻YMM-A

PUHY-P✻✻✻YSM-A

CN3N 1-3P

OPEN

SHORT

Auto changeover:OFF

Auto changeover:ON

–

COOL

–

HEAT

1-3P

OPEN

SHORT

ON/OFFONOFF

1-2P

OPEN

SHORT

MODE

OFF

52F

Magnetic contactor (Fan motor)

MF3

Fan motor (Radiator panel)

CH11,12

Crank case heater (Compressor)

21S4a,b,c

4-way valve

SV1,3

Solenoid valve (Discharge-suction bypass)

SV5b,c

Solenoid valve (Heat exchanger capacity control)

SV5d

Solenoid valve

LEV1

Electronic expansion valve(SC coil)

TH11,12

Thermistor

Discharge pipe temp. detect

TH2

Gas pipe temp.detect (Hex outlet)

TH5

Pipe temp.detect (Hex outlet)

TH6

OA temp.detect

TH7

liquid outlet temp.detect at Sub-cool coil

TH8

bypass outlet temp.detect at Sub-cool coil

THHS1

Radiator panel temp. detect

63H1,2

High pressure switch

63HS

High pressure sensor

63LS

Low pressure sensor

L1,L2

Choke coil (Transmission)

Z20

Function device

Earth terminal

Symbol Name

Appliance (include"-BS")

Difference(not existed)

[3:Set up of a function(SW5-7,5-8)

[2:Auto changeover (CN3N 1-2P,1-3P)

SW4-7:ON (8STEPS DEMAND)

8 STEPS

DEMAND

side

CN3D

OS(KU) side CN3D

100%

50%

88%

75%

38%

25%

88%

38%

75%

25%

75%

63%

50%

CN3N 1-2P

OPEN SHORT

[1: Function according to switch operation.

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

SW4-7:OFF (Compressor ON/OFF and

NIGHT MODE)

CN3D Compressor CN3D NIGHT

OPEN

SHORT

OPEN

SHORT

OPEN

SHORT

OPEN

SHORT

1-2P

1-3P

∞∞

Electrical Wiring Diagram

[1] PUHY-P850,900,950,1000,1050,1100,1150,1200,1250YGM-A

Page 58

- 56 -

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

3 4

TB3

TB2

CN2

CN4

CN3

C.B.

CN1

( )

2 3 45

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.

[2] Power Dispatching Extension Unit for the Transmission Lines

Page 59

SV5b

TH5

TH8

TH11

TH6

21S4b

<PUHY-P-YSM-A(-BS)>

21S4c 21S4a

TH2

TH7

TH12

CJ3

CJ1

CP2

CP1

ST7

ST6

ST5

SV1

CV1 CV2

O/S O/S

CJ2

Stop-valve

Liquid

distributor

Oil balance pipe

Acc

Oil

tank

63H1

63HS

63H2

63LS

LEV1 ST8

CP3 ST9

ST2 SV5dBV2

SV3

ST10ST11ST12ST13

Drier

SCC

(HIC cycle)

Comp1 Comp2

HEX1a

(F)

HEX2a

(B)

HEX1b

(F)

HEX2b

(B)

SV5c

ST1 BV1

SV5b

TH5

TH8

TH11

TH6

21S4b

<PUHY-P-YMM-A(-BS)>

21S4c 21S4a

TH2

TH7

TH12

CJ3

CJ1

CP2

CP1

ST7

ST6

ST5

SV1

CV1 CV2

O/S O/S

CJ2

Stop-valve

Acc

Oil

tank

63H1

63HS

63H2

63LS

LEV1 ST8

CP3 ST9

ST2 SV5dBV2

SV3

ST10ST11ST12ST13

Drier

SCC

(HIC cycle)

Comp1 Comp2

HEX1a

(F)

HEX2a

(B)

HEX1b

(F)

HEX2b

(B)

SV5c

ST1 BV1

Gas

distributor

- 57 -

§§

Refrigerant Circuit

[1] Refrigerant Circuit Diagram

Page 60

Name Notes Function Specification Check method

Symbol

(function)

273+t

Compressor

High

-pressure sensor

Pressure switch

Thermistor

MC1

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.

Inverter compressor Low-pressure shell scroll type Winding resistance

10˚C : 0.560Ω 20˚C : 0.583Ω 30˚C : 0.606Ω

MC2

Obtains the constant volume of circulating refrigerant when the load increases, which MC1 cannot adjust the load level.

Commercial power supply compressor Low-pressure shell scroll type Winding resistance

10˚C : 1.903Ω 20˚C : 1.981Ω 30˚C : 2.059Ω

63H1 63H2

TH11, 12 (Discharge)

TH5 (Piping temperature)

TH6 (Outdoor air 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

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 R

25/120=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

- 58 -

[2] Functions of Principal Parts

1. Outdoor Unit

Page 61

Name FunctionNotes Specification Check method

Symbol

(function)

Solenoid valve

Linear expansion valve

SV1 Dischargesuction bypass

SV3 Dischargesuction bypass

SV5b, 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.

SV5d

Prevents refrigerant flow to the stop unit.

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(25)%) or heating cycle

AC220

~240V De-energized : cooling cycle (Heat exchanger unit heat exchanger capacity 100(50)%) Energized : cooling cycle (Heat exchanger unit heat exchanger capacity 25%) or heating cycle

Continuity check with a tester

CH11, 12 Crankcase heater

Heater

- 59 -

Page 62

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

- 60 -

2. Indoor Unit

Page 63

- 61 -

SW4

SW5

1 2 3 4

– Pump down operation Heating Tcm

–

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

–

SW3

1 2 3 4

5 6 7

8 9

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

– –

–

– –

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

5 6 7

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

–

–– ––

–– –– –– –– –– –– –– –– –– ––

System setting for 34HP or more

32HP or less Before power on34HP or more

OC/OS model setting switching

OC (main unit) Before power onOS (sub unit) –– –– –– ––

Note1 : 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.

Note2 : : OC/OS require individual setting.

: OC/OS require the same setting.

OC : Main unit, OS : Sub unit

Unit setting(Note 2)

OC OS

–

––

¶¶

Control

[1] Dip Switch Functions and Their Factory Settings

1. Outdoor unit

(1) MAIN board

Page 64

- 62 -

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

2 3 4

5 6 1

2 3 4

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

2 3 4

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

Page 65

- 63 -

SW1

1 2 3 4 5 6 7 8

1 2

3 4

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 Ineffective

Heat pump

None None

None

1st setting

–

Effective

– –

Built in remote controller

Provided

2500h

Effective

Thermo. ON signal display

Always at heat.

Low speed Set airflow

Effective 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 66

- 64 -

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

3 2 1

(PCFY-P-VGM-E)

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

3 2 1

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 67

- 65 -

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 68

- 66 -

Primary

unit

Secondary

unit

Display

SW1

134679102

LD1

LD2

LD3

LD4

LD5

LD6

LD7

LD8

Compressor name

Primary unit

Secondary unit

No.1 compressor No.2 compressor No.1 compressor No.2 compressor

Compressor type Inverter compressor Commercial power supply compressor Inverter compressor Commercial power supply compressor

Primary unit

Secondary unit

No.1 compressor No.2 compressor No.1 compressor No.2 compressor

OFF OFF OFF

Little frequency

Medium frequency

Little frequency

Medium frequency

Little frequency Large frequency

Little required performance

Large required performance

OFF ON ON

ON ON

OFF

Little frequency

Medium frequency

Little frequency

OFF OFF OFF

OFF

Large frequency

[2] Controlling the Outdoor Unit

1. Relation between sub/main unit and primary/secondary unit (Rotation control)

• Sub unit and main unit are the proper names of the unit, and primar y unit and secondar y unit are the names to distinguish the sub/main unit when controlling the units.

• The sub unit will be a primar y unit and the main unit will be a secondar y unit in the initial stage, however, the primary-secondar y relation will be switched every more than 2 operation hours. (Rotation control)

• Rotation control is performed while all the compressors are stopping. (As long as the compressor is r unning, even if more than 2 hours have passed, the relation between primary unit and secondar y unit will not change.)

• Rotation control is also performed under 10.Control at initial star tup or 11.Emergency operation mode.

• To check whether the unit is primary or secondar y, check the self-diagnosis switch (SW1).

2. 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”, “unit type and capacity”, “M-NET address” in turn every second.

3. Compressor capacity control

(1) Compressor type

The following types of compressors are equipped.The capacity control is performed by changing the number of compressors in operation and changing frequency of the inverter compressor.

(2) Capacity control standard

• Capacity control is performed to make evaporating temperature (Te) 0˚C (evaporating pressure 0.71MPa) dur- ing cooling operation, and to make condensing temperature (Tc) 49˚C (condensing pressure 2.88MPa) during heating operation.

• Capacity control is basically performed every 30 seconds. (except for (4)Compressor capacity limit is applied.)

(3) Capacity control method

Change the number of compressors in operation and frequency of the inverter compressor according to the required performance.

Note1: When frequency of the primary No.1 compressor exceeds 85Hz, the secondary No.1 compressor will start. Note2: Frequency of the primary No.1 compressor and that of the secondary No.1 compressor are almost the same. Note3:The pr imar y No.2 compressor and the secondary No.2 compressor turn ON or OFF almost at the same time.

Page 69

- 67 -

(4) Compressor capacity limit

Compressor capacity is limited according to the operation status of the unit. 1 ON/OFF limit

When the compressor turns off once, it will be OFF for 3 minutes under any circumstances.

2 Pressure rise limit

When high-pressure pressure (63HS) of the primary or the secondar y unit exceeds 3.68MPa, frequency drops every 30 seconds.

3 Pressure drop limit

When low-pressure pressure (63LS) of the primary or the secondary unit is 0.23MPa or less, compressor frequency does not rise.

4 Discharge temperature rise limit

When discharge temperature (TH11, TH12) of the compressor in operation exceeds 110˚C, frequency drops every 30 seconds.

5 Discharge temperature drop limit

When discharge superheat (TH11-Tc, TH12-Tc) is 5K or less, compressor frequency does not rise.

(5) Minimum/Maximum frequency

• Compressor minimum frequency is 20Hz. (only the primary No.1 compressor is operation)

• Compressor maximum frequency is shown as below.

P1250

P1200

P1150

360Hz

340Hz

344Hz

318Hz

60Hz 120Hz 60Hz 350Hz 115Hz 60Hz

P1100

P1050

P1000

P950

P900

P850

332Hz

312Hz

296Hz

294Hz

280Hz

262Hz

276Hz

262Hz

250Hz

248Hz

232Hz

216Hz 230Hz

218Hz

Outdoor

unit model

Power supply

frequency

Total

frequency

Cooling operation

Primary unit

No.1

compressor

No.2

compressor

No.1

compressor

No.2

compressor

50Hz

60Hz

50Hz

60Hz

50Hz

60Hz

50Hz

60Hz

50Hz

60Hz

50Hz

60Hz

50Hz

60Hz

50Hz

60Hz

50Hz

120Hz

112Hz

116Hz

99Hz

106Hz

88Hz

97Hz

80Hz

88Hz

71Hz

81Hz

65Hz

74Hz

56Hz

65Hz

48Hz

59Hz

50Hz

60Hz

50Hz

60Hz

50Hz

60Hz

50Hz

60Hz

50Hz

60Hz

50Hz

60Hz

50Hz

60Hz

50Hz

60Hz

50Hz

120Hz 60Hz

120Hz

112Hz

116Hz

99Hz

106Hz

88Hz

97Hz

80Hz

88Hz

71Hz

81Hz

65Hz

74Hz

56Hz

65Hz

48Hz

59Hz

50Hz

60Hz

50Hz

60Hz

50Hz

60Hz

50Hz

60Hz

50Hz

60Hz

50Hz

60Hz

50Hz

60Hz

50Hz

60Hz

50Hz

340Hz

330Hz

326Hz

318Hz

314Hz

306Hz

302Hz

288Hz

284Hz

272Hz

274Hz

258Hz

246Hz

244Hz

234Hz

120Hz

105Hz

113Hz

99Hz

107Hz

93Hz

101Hz

84Hz

92Hz

76Hz

87Hz

69Hz

79Hz

63Hz

72Hz

57Hz

67Hz

Secondary unit

Total

frequency

Primary unit

No.1

compressor

No.2

compressor

No.1

compressor

No.2

compressor

Secondary unit

50Hz

60Hz

50Hz

60Hz

50Hz

60Hz

50Hz

60Hz

50Hz

60Hz

50Hz

60Hz

50Hz

60Hz

50Hz

60Hz

50Hz

115Hz 60Hz

120Hz

105Hz

113Hz

99Hz

107Hz

93Hz

101Hz

84Hz

92Hz

76Hz

87Hz

69Hz

79Hz

63Hz

72Hz

57Hz

67Hz

50Hz

60Hz

50Hz

60Hz

50Hz

60Hz

50Hz

60Hz

50Hz

60Hz

50Hz

60Hz

50Hz

60Hz

50Hz

60Hz

50Hz

Heating operation

4. Control at start-up

• When star ting up a compressor, start the No.1 compressor first. However, to switch the 4-way valve properly when starting a compressor during heating operation, star t the secondar y No.1 compressor for up to 1 minute simultaneously with the start of the primar y No.1 compressor.

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

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

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

Page 70

- 68 -

No.1 Compressor

Stopped Stopped OFF

In operation Stopped ON In operation In operation OFF

No.2 Compressor SV3

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

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

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)

5. 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)

6. Outdoor fan (outdoor heat exchanger) capacity control

(1) Capacity control standard

• Outdoor fan (outdoor heat exchanger) capacity control is performed to make condensing temperature (Tc) outdoor temperature +10˚C (TH6+10˚C) during cooling operation and to make evaporating temperature (Te) 0˚C (evaporating pressure 0.71MPa) during heating operation.

• Capacity control is basically performed every 30 seconds.

Page 71

Operation

mode

Heat exchanger

capacity

Number of fan

Fan inverter

control

4-way valve 2-way valve

21S4a 21S4b 21S4c

SV5b

(✻4)

SV5c

(✻4) 25%(✻1) 50%(✻2)

100% 100% 100%

Cooling

1(✻3) 1(✻3)

2 2 0

10~100% 10~100% 10~100% 10~100%

OFF OFF OFF

OFF

ON ON

OFF

ON OFF OFF

ON OFF

ON OFF OFF OFF

ON OFF OFF OFF OFF

Heating Defrost

Primary unit

Defrost operation Defrost operation

Secondary unit

Stopped

Stopped Stopped

No.1

compressor

No.2

compressor

Compressor

frequency

✻The same

regardless of the

model

50Hz 60Hz

57Hz

50Hz 60Hz

Power

supply

frequency

No.1

compressor

No.2

compressor

Power supply

frequency

50Hz 60Hz

No.1

compressor

No.2

compressor

50Hz 60Hz

57Hz

50Hz 60Hz

Power supply

frequency

Outdoor fan

SV1

SV3 21S4a 21S4b

21S4c

SV5a SV5b

SV5c SV5d LEV1

Stopped

ON OFF OFF OFF OFF OFF OFF OFF

480 pulse

Stopped

ON OFF OFF OFF OFF OFF OFF OFF

480 pulse

Stopped

OFF OFF OFF OFF OFF OFF OFF OFF

0 pulse

- 69 -

(2) Capacity control method

• The primar y outdoor fan (outdoor heat exchanger) capacity and the secondary outdoor fan (outdoor heat exchanger) capacity are almost the same.

• The outdoor fan stops while the compressor is stopping.

• The unit operates at full speed for 5 seconds after the outdoor unit fan starts.

• The outdoor unit fan stops during defrost operation.

• The outdoor fan air flow rate is controlled by the inver ter by switching the heat exchanger capacity using the 4-

way valve (21S4a, 21S4b, 21S4c) or the 2-way valve (SV5b, SV5c) according to the required performance.

(

✻1) Use of only the left rear heat exchanger viewed from the front of the unit

(

✻2) Use of only the left heat exchanger viewed from the front of the unit

(

✻3) Use of only the left fan viewed from the front of the unit

(

✻4) The 2-way valve (SV5b, SV5c) is open while not being powered and closed while being powered.

7. Defrost operation control

(1) Starting the defrost operation

• Defrost operation is performed only on the primar y unit when the secondar y unit is being stopped dur ing

heating operation, and is performed on both the primary and the secondary units at the same time when the primary and the secondar y units are operating during heating operation.

• Defrost operation is started when one of the following conditions is met.

1 When the primar y compressor unit pipe temperature (TH5) of -8˚C has continuously been detected for 3

minutes after the integrated primary compressor operation time of 50 minutes have passed.(90 minutes later when the defrost prohibit timer is set to 90 minutes.)

2 When the secondary compressor unit pipe temperature (TH5) of -8˚C has continuously been detected for 3

minutes after the integrated secondary compressor operation time of 50 minutes have passed.(90 minutes later when the defrost prohibit timer is set to 90 minutes.)

(2) Defrost operation

Page 72

- 70 -

(3) Completion of defrost operation

• Defrost operation stops when one of the following conditions is met. (When only the primary unit performs

defrost operation, apply the conditions only to the primary unit.)

1 When 12 minutes have passed since the beginning of defrost operation. 2 When the compressor unit pipe temperature of both the primary and the secondary units 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 25˚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.

9. 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.

8. 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 dur ing 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

• Refr igerant 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.

[During cooling operation]

(1) Initiation of refrigerant recovery

• Recovery of refrigerant dur ing 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 73

Flow chart of initial operation mode

Start of initial operation mode

F1 F2

Power supply frequency

50Hz 30Hz 60Hz

50Hz 60Hz20Hz

Primary unit STEP1

• Operation of only the primary No.1 compressor

• F1 60Hz

Yes

STEP1 The total indoor

operation capacity is P250 or more

(∑Qj 50) after

3 minutes.

Primary/secondary unit STEP1

• Operation of only the primary or the secondary No.1 compressor

• Less than 30 minutes for STEP1: F1 60Hz (both primary and secondary units) 30 minutes or more for STEP1: F1 85Hz (both primary and secondary units)

• Completed in the STEP1 integrated operation time of 40 minutes (When discharge superheat of the compressor is high, the operation may be completed less than 40 minutes.)

Primary unit STEP1

• Operation of only the primary No.1 compressor

• Less than 30 minutes for STEP1: F1 60Hz

(primary unit)

• 30 minutes or more for STEP1: F1 85Hz (primary unit)

• Completed in the STEP1 integrated operation time of 40 minutes (When discharge superheat of the compressor is high, the operation may be completed less than 40 minutes.)

✻1

Primary/secondary unit STEP3

• Operation of the primary and the secondary No.1 and No.2 compressors

• Completed in the STEP3 integrated operation time of 5 minutes

F1 F2

Power supply frequency

50Hz 30Hz 60Hz

50Hz 60Hz20Hz

Primary unit STEP3

• Operation of the primary No.1 and No.2 compressors

• Completed in the STEP3 integrated operation time of

5 minutes

Primary unit STEP1

• Operation of only the primary No.1 compressor

• Less than 30 minutes for STEP1: F1 60Hz

(primary unit)

• 30 minutes or more for STEP1: F1 85Hz (primary unit)

• Completed in the STEP1 integrated operation time of 40 minutes (When discharge superheat of the compressor is high, the operation may be completed less than 40 minutes.)

F1 F2

Power supply frequency

50Hz 30Hz 60Hz

50Hz 60Hz20Hz

Primary unit STEP3

• Operation of the primary No.1 and No.2 compressors

• Completed in the STEP3 integrated operation time of

5 minutes

Completion of initial operation

✻1

When the air-conditioning load is low and the primary/ secondary units cannot be operated in conjunction.

• Stop of the primary/secondary units

• Perform rotation control on both the primary and the

secondary units. (Switching the relation between sub/main unit and primary/secondary unit. Refer to item 1.)

- 71 -

10. Control at initial startup

• When the operation will be started in less than 12 hours after the power is turned on, the initial operation mode is started.

Page 74

- 72 -

Step 1 Step 3

Step 1 Step 3Step 1 Step 3 Rotation

control

Main unit No.1 compressor ON/OFF

Sub unit No.1 compressor ON/OFF

Sub unit No.2 compressor ON/OFF

Main unit No.2 compressor ON/OFF

Main unit No.1 compressor ON/OFF

Sub unit No.1 compressor ON/OFF

Sub unit No.2 compressor ON/OFF

Main unit No.2 compressor ON/OFF

3 minutes

5 minutes40 minutes

Completion of initial start up operation

3 minutes

5 minutes40 minutes 5 minutes40 minutes

The main unit is the primary unit and the sub unit is the secondary unit.

The main unit is the secondary unit and the sub unit is the primary unit.

Completion of initial start up operation

< Initial start-up control:Time chart >

[Example 1] When the sub unit and the main unit operate in conjunction

[Example 2] When the sub unit and the main unit operate alternately

Page 75

Codes of the errors that allow an emergency operation

Error code content

Compressor with problems

No.1 compressor

No.2 compressor

4220 4230 4240 4250 4260 5110 5301 4108

0403

Bus Voltage drop abnormality (S/W detect)

Serial transmission abnormality

Heat sink overheat protection Overload protection Over-current abnormality Cooling fan abnormality Heat sink thermal sensor abnormality (THHS) Current sensor/circuit abnormality Over-current protection (No.2 Comp)

Primary unit

Secondary unit

Allows or not

allows an

emergency operation

Indoor unit capacity that can be operated (Note1)

Compressor with problems No.1 compressor No.2 compressor No.1 compressor No.2 compressor

Cooling Heating

(Note1) When the indoor unit whose capacity is more than the capacity that can be operated

is operated, the unit will be in the same status as the thermo OFF.

Error

Normal Normal

Normal

60%

Error

Normal Normal

Error

Normal

Normal Normal

Error

Normal

- 73 -

11. Emergency operation mode

■ When problems occur with the compressor

• Emergency operation mode is an operation that the unit runs on a first-aid basis when problems occur with the compressors (Primary unit No.1, No.2, Secondary unit No.1, No.2).

• It can be star ted by performing an error reset on the remote controller.

• Indoor unit capacity that can be operated is limited depending on the compressor with problems (refer to the

table below).

(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 item 1 above)

(refer to the table below) the unit will begin “ retry ” operation.

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 -

■ When problems occur with the pressure sensor and the thermistor

• Emergency operation mode is an operation that the outdoor unit runs on a first-aid basis when problems occur with the pressure sensor and the thermistor. (possible during only cooling operation).

• It can be star ted by performing an error reset on the remote controller.

• Indoor unit capacity that can be operated is limited (refer to the table below).

(1) Starting an emergency operation

(refer to the table below) the unit will begin “ retry ” operation.

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.

Codes of the errors that allow an emergency operation

Error code content

Parts with problems

Thermistor

Pressure sensor

5101 5105

5106 5107 5108 5201

TH11 TH12

TH5 TH6 TH7 TH8

63HS

Liquid pipe thermal sensor abnormality

Discharge thermal sensor abnormality

Ambient temperature thermal sensor abnormality SC coil outlet thermal sensor abnormality SC coil bypass outlet thermal sensor abnormality High pressure abnormality

Primary unit

Secondary unit

Allows or not

allows an

emergency operation

Indoor unit capacity that can be operated (Note1)

Cooling Heating

Thermistor Pressure sensor

Primary unit with problem

(Note1) When the indoor unit whose capacity is more than the capacity that can be

operated is operated, the unit will be in the same status as the thermo OFF.

Error

40%

Normal

Normal Error

Thermistor Pressure sensor

Secondary unit with problem

(2) Finishing the emergency operation mode

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

[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 77

- 75 -

■ When having only the sub unit (OS) in operation in case of emergency

• Emergency operation mode is an operation that only the sub unit (OS) runs a first-aid basis when prob lems occur with the circuit board on the main unit (OC) or when the compressor is replaced.

• It operates with the lowest performance among the groups.

• Follow the following procedures in case of an emergency operation.

✻Before the work, be sure to turn off the power.

1 Turn the dip switch (SW5-8) on the MAIN board

on OS side from ON to OFF.

2 Reconnect the transmission line of the

indoor/outdoor transmission terminal block (TB3) on OC side to the terminal block for centralized control (TB7).

3 Remove the CNS2 (centralized sub) connector

(blue, 3P) on the MAIN board on OC side.

4 Reconnect the transmission line between OC and

OS from TB7 to TB3.

5 Remove the model identification resistance

(TYPE1) connector (CNTYP1, red, 2P) on the MAIN board on OS side.

6 Turn the power on, and start operating.

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.

12. Operation mode

(1) Indoor unit operation modes

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

13. Demand control

Cooling/heating operation can be prohibited (thermo OFF) by an external input to the outdoor units.

Note: When DIPSW4-7 are on, 4-STEP DEMAND CONTROL is possible using NIGHT MODE input and

DEMAND input. In case of 34~50HP, 8-step DEMAND CONTROL is possible. NIGHT MODE will become unavailable however. Refer to

™-[3]-(4) for more detail.

(2) Outdoor unit operation mode

MAIN board

CNS2

Remove

MAIN board SW5-8

CNTYP1

TB3 TB7

Indoor unit Indoor unitIndoor unit

ON→OFF

Remove

Page 78

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

- 76 -

[3] Operation Flow Chart

1. Flow to determine the mode

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

Page 79

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

- 77 -

(2) Outdoor unit (cooling, heating mode)

Page 80

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.

- 78 -

2. Operation under each mode

(1) Cooling operation

Page 81

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

- 79 -

(2) Heating operation

Page 82

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

- 80 -

(3) Dry operation

Page 83

- 81 -

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

˚C

1Hr.

NOT AVAILABLE

˚C

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 84

- 82 -

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.

1 2

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.

1 2 3

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 85

- 83 -

Example

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

1) + (0.2 x L2) + (0.12 x L3) + (0.06 x L4) + (0.024 x L5) + α

2 : Length of

15.88 liquid pipe (m)

1 : Length of

19.05 liquid pipe (m)

3 : Length of

12.7 liquid pipe (m)

4 : Length of

9.52 liquid pipe (m)

5 : 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: 28.92kg

❉ Refrigerant is charged to the compressor unit.

→ 29.0kg)

Main unit P450

Amount of refrigerant to be charged 22.0kg

P500

22.0kg

P550

22.0kg

P600

22.0kg

P650

22.0kg

Sub unit P400

Amount of refrigerant to be charged 22.0kg

P650

22.0kg

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

1071 ~ 1250 7.0kg 1251 ~ 9.0kg

1.0kg

Main unit

IndoorbIndoor

Indoor

IndoorfIndoor

Indoor

Liquid distributor Gas distributor

(Note1)

Sub unit

C D E F

G I J

(Note 1) As the gas distributor is

built in on the sub unit, B indicates only the liquid pipe.

Indoor

when

Therefore,

1. 250Type A :

ø15.88 3m a : ø9.52 15m

2. 200Type B :

ø15.88 1m b : ø9.52 15m

3. 80Type C :

ø19.05 40m c : ø9.52 5m

4. 71Type D :

ø15.88 10m d : ø9.52 5m

5. 140Type E :

ø12.7 5m e : ø9.52 5m

6. 125Type F :

ø9.52 5m f : ø9.52 5m

7. 63Type G :

ø12.7 30m g : ø9.52 5m

8. 25Type I :

ø9.52 5m i : ø6.35 5m

ø9.52 5m

Additional charge volume = 40 x 0.29 + 14 x 0.20 + 35 x 0.12 + 70 x 0.06 + 5 x 0.024 + 6.0

= 29.0kg

Caution

Use liquid refrigerant to charge the system.

• Use of gas refrigerant changes the composition of the

refrigerant in the cylinder, resulting in possible performance drop.

Total piping length of each liquid pipe is

ø15.88 : A + B + D = 14m

ø19.05 : C = 40m

ø12.7 : E + G = 35m ø9.52 : F + I + J + a + b + c + d + e + f + g = 70m ø6.35 : i = 5m

Page 86

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 (system unit, main unit) control

board, ON starts refrigerant volume adjustment mode operation and the following operation occurs.

Operation Operation The outdoor unit LEV opens less than usual during cooling operation,

so that the subcool can be easily got.

Notes:

Self-diagnosis switch for TH1

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 TH1, Tc - TH5 and Tc - TH7.

1. Be sure to turn on SW2-4 on both the sub unit and the main unit.

2. Based on the following flowchart, use TH1, TH5, TH7 and Tc to adjust the refrigerant volume. Check the values of TH1, TH5, TH7, Tc of both the sub unit and the main unit following the flowchart. Use the selfdiagnosis switch (SW1) on each main PCB of the outdoor unit, the system unit and the main unit to display TH1, TH5, TH7 and Tc.

3. Even if the refrigerant volume has reached a suitable level shortly after starting refrigerant volume adjustment mode, if left for a suf ficient 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. ✻ In this case, wait until the refrigerant volume for TH5-TH7 becomes 5K or more, or 5 to 15K for SH at the

indoor unit, and judge the suitable refrigerant amount.

4. There are times when it becomes difficult to determine the volume when performing refrigerant adjustments if the high pressure exceeds 2.0MPa.

5. 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.

- 84 -

[5] Refrigerant Volume Adjustment Mode Operation

Page 87

YES

• If gas refrigerant is used to seal the system, the

composition of the refrigerant in the cylinder will change and performance may drop.

Start SW2-4 ON on both the system unit and the main unit

All indoor units are run in

test cooling mode

Minimum of

30 minutes continuous

operation

Has the compressor

operating frequency of both the system

unit and the main unit stabilised?

❉ Refer to the previous page for Notes 1

through 5.

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.

≤

System has the correct amount of refrigerant SW2-4 OFF on both the system unit and the main unit

Note5

Has the initial start-up

mode been completed?

Is TH11 100˚C on both the system unit and the main unit?

≤

Is TH11 95˚C on both the system unit and the

main unit?

ait 5minutes before making next judgment.

Is 8 Tc-TH5 12K ? (Use the larger value of the values of the sub unit and the main unit for judgment.)

≤≤

Note2

Note4

Is Tc-TH7 20K ?

(Use the unit that was used for

Tc-TH5 judgment for judgment.)

Note2

≥

- 85 -

[ Refrigerant Adjustment Method ]

Page 88

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 tim e 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

- 86 -

[6] Symptoms that do not Signify Problems

Page 89

Items

Outdoor unit

Ambient temp.

Indoor

DB/WB

Set type Main unit Sub unit

Outdoor Quantity Quantity in operation

Set

Indoor unit

Condition

Model

–

Main pipe

Piping

Branch pipe

Total piping length Indoor unit fan notch – Refrigerant volume kg

Outdoor unit

Total current A Vo Vlts

Indoor unit

Pulse

LEV opening

SC (LEV1) (✻1)

Pressure

High pressure (after O/S) /Low pressure (before accumulator)(✻1)

MPa

Discharge (TH11/TH12) Heat exchanger outlet (TH5)

Accumulator

Inlet

Outdoor unit (

✻1)

Outlet

Suction (Compressor)

˚C

Shell bottom (Compressor) SCC outlet (TH7) Bypass outlet (TH8)

Indoor

LEV inlet

unit

Heat exchanger outlet

No.2 compressor frequency (50/60Hz) Hz

No.1 compressor frequency (50/60Hz) Hz

(✻1) Both for sub unit and the main unit

Sectional temp.

388 324 324 325 261 261

387 222

250 200 125

71 71 20

10020250 200 125

100 50 32

12520250 200 200

100 32 32

125

PUHY-P900YSGM-A PUHY-P950YSGM-A

PUHY-P500YMM-A PUHY-P550YMM-A

PUHY-P400YSM-A PUHY-P400YSM-A

27.0/19.0

35.0/24.0

388 324 387 253 253 187

325 187

8 8

27.0/19.0

35.0/24.0 8 8

50 Hi

54 54

45.0/41.2 49.3/45.1 380/415 380/415

184 196

50/60 50/60

65/56 74/65

2.74/0.84 2.77/0.84

81/86 82/86

40 40 15 15

15 15 19/16 19/16 46/49 47/49

22 22

99 22 22 14 14

388 324 387 325 362 261

387 187

PUHY-P850YSGM-A

PUHY-P450YMM-A PUHY-P400YSM-A

27.0/19.0

35.0/24.0 8 8

42.6/39.0

380/415

175

50/60

59/48

2.71/0.85

80/86

39 15

15 19/16 45/19

9 21 14

- 87 -

[7] Standard Operation Data (Reference Data)

1. Cooling operation

Page 90

- 88 -

Items

Outdoor unit

Ambient temp.

Indoor

DB/WB

Set type Main unit Sub unit

Outdoor Quantity Quantity in operation

Set

Indoor unit

Condition

Model

–

Main pipe

Piping

Branch pipe

Total piping length Indoor unit fan notch – Refrigerant volume kg

Outdoor unit

Total current A Vo Vlts

Indoor unit

Pulse

LEV opening

SC (LEV1) (✻1)

Pressure

High pressure (after O/S) /Low pressure (before accumulator)(✻1)

MPa

Discharge (TH11/TH12) Heat exchanger outlet (TH5)

Accumulator

Inlet

Outdoor unit (

✻1)

Outlet

Suction (Compressor)

˚C

Shell bottom (Compressor) SCC outlet (TH7) Bypass outlet (TH8)

Indoor

LEV inlet

unit

Heat exchanger outlet

No.2 compressor frequency (50/60Hz) Hz

No.1 compressor frequency (50/60Hz) Hz

(✻1) Both for sub unit and the main unit

Sectional temp.

388 388 324 325 362 261

324 222

250 250 200

63 63 32

12525250 250 200

100 71 32

12525250 250 200

100 50 32

200

PUHY-P1050YSGM-A PUHY-P1100YSGM-A

PUHY-P650YMM-A PUHY-P450YMM-A

PUHY-P400YSM-A PUHY-P650YSM-A

27.0/19.0

35.0/24.0

388 388 324 441 441 261

387 222

8 8

27.0/19.0

35.0/24.0 8 8

50 Hi

54 55

56.5/51.7 61.4/56.2 380/415 380/415

214 225

50/60 50/60

88/80 97/88

2.83/0.83 2.86/0.82

84/86 85/86

41 42 14 14

14 14 18/15 18/15 49/49 50/49

23 24

88 23 24 13 13

388 388 324 325 253 261

387 222

PUHY-P1000YSGM-A

PUHY-P600YMM-A PUHY-P400YSM-A

27.0/19.0

35.0/24.0 8 8

52.5/48.0

380/415

205

50/60

81/71

2.80/0.83

83/86

41 14

14 18/15 48/49

8 23 13

Page 91

Items

Outdoor unit

Ambient temp.

Indoor

DB/WB

Set type Main unit Sub unit

Outdoor Quantity Quantity in operation

Set

Indoor unit

Condition

Model

–

Main pipe

Piping

Branch pipe

Total piping length Indoor unit fan notch – Refrigerant volume kg

Outdoor unit

Total current A Vo Vlts

Indoor unit

Pulse

LEV opening

SC (LEV1) (✻1)

Pressure

High pressure (after O/S) /Low pressure (before accumulator)(✻1)

MPa

Discharge (TH11/TH12) Heat exchanger outlet (TH5)

Accumulator

Inlet

Outdoor unit (

✻1)

Outlet

Suction (Compressor)

˚C

Shell bottom (Compressor) SCC outlet (TH7) Bypass outlet (TH8)

Indoor

LEV inlet

unit

Heat exchanger outlet

No.2 compressor frequency (50/60Hz) Hz

No.1 compressor frequency (50/60Hz) Hz

(✻1) Both for sub unit and the main unit

Sectional temp.

388 388 388 325 325 222

388 222

250 250 200 100 50 32

20025250 250 250

100 50 32

25032250 250 250

100 100 25

250

PUHY-P1200YSGM-A PUHY-P1250YSGM-A

PUHY-P550YMM-A PUHY-P600YMM-A

PUHY-P650YSM-A PUHY-P650YSM-A

27.0/19.0

35.0/24.0

388 388 324 325 362 261

324 222

8 8

27.0/19.0

35.0/24.0 8 8

50 Hi

55 55

74.9/68.6 80.2/73.5 380/415 380/415

246 254

50/60 50/60

116/112 120/120

2.94/0.81 2.98/0.81

87/86 88/86

43 43 13 13

13 13 17/14 17/14 52/49 53/49

25 25

77 25 25 12 12

388 388 388 325 362 261

388 261

PUHY-P1150YSGM-A

PUHY-P500YMM-A PUHY-P650YSM-A

27.0/19.0

35.0/24.0 8 8

67.4/61.7

380/415

236

50/60

106/99

2.89/0.82

86/86

42 13

13 17/14 51/49

7 24 12

- 89 -

Page 92

Items

Outdoor unit

Ambient temp.

Indoor

DB/WB

Set type Main unit Sub unit

Outdoor Quantity Quantity in operation

Set

Indoor unit

Condition

Model –

Main pipe

Piping

Branch pipe

Total piping length Indoor unit fan notch – Refrigerant volume kg

Outdoor unit

Total current A Vo Vlts

Indoor unit

Pulse

LEV opening

SC (LEV1) (✻1)

Pressure

High pressure (after O/S) /Low pressure (before accumulator)(✻1)

MPa

Discharge (TH11/TH12) Heat exchanger outlet (TH5)

Accumulator

Inlet

Outdoor unit (

✻1)

Outlet

Sectional temp.

Suction (Compressor)

˚C

Shell bottom (Compressor)

Indoor

LEV inlet

unit

Heat exchanger outlet

No.2 compressor frequency (50/60Hz) Hz

No.1 compressor frequency (50/60Hz) Hz

(✻1) Both for sub unit and the main unit

400 332 332 332 254 254

406 229

250 200 125

71 71 20

10020250 200 125

100 50 32

12520250 200 200

100 32 32

125

PUHY-P900YSGM-A PUHY-P950YSGM-A

PUHY-P500YMM-A PUHY-P550YMM-A

PUHY-P400YSM-A PUHY-P400YSM-A

20.0/-

7.0/6.0

400 332 406 259 259 194

332 194

8 8

20.0/-

7.0/6.0 8 8

50 Hi

54 54

49.1/44.9 51.3/47.0 380/415 380/415

50/60 50/60

72/63 79/69

2.82/0.66 2.82/0.66

78/83 79/83

00 11 11

0/0 0/0

28/31 29/31

36 36 75 75

400 332 406 332 373 254

406 194

PUHY-P850YSGM-A

PUHY-P450YMM-A PUHY-P400YSM-A

20.0/-

7.0/6.0 8 8

46.3/42.4 380/415

50/60

67/57

2.81/0.67

77/83

0 1 1

0/0

27/31

36 75

- 90 -

2. Heating operation

Page 93

400 400 332 332 373 254

332 229

250 250 200

63 63 32

12525250 250 200

100 71 32

12525250 250 200

100 50 32

200

Items

Outdoor unit

Ambient temp.

Indoor

DB/WB

Set type Main unit Sub unit

Outdoor Quantity Quantity in operation

Set

Indoor unit

Condition

Model –

Main pipe

Piping

Branch pipe

Total piping length Indoor unit fan notch – Refrigerant volume kg

Outdoor unit

Total current A Vo Vlts

Indoor unit

Pulse

LEV opening

SC (LEV1) (

✻1)

Pressure

High pressure (after O/S) /Low pressure (before accumulator)(✻1)

MPa

Discharge (TH11/TH12) Heat exchanger outlet (TH5)

Accumulator

Inlet

Outdoor unit (

✻1)

Outlet

Sectional temp.

Suction (Compressor)

˚C

Shell bottom (Compressor)

Indoor

LEV inlet

unit

Heat exchanger outlet

No.2 compressor frequency (50/60Hz) Hz

No.1 compressor frequency (50/60Hz) Hz

(✻1) Both for sub unit and the main unit

PUHY-P1050YSGM-A PUHY-P1100YSGM-A

PUHY-P650YMM-A PUHY-P450YMM-A

PUHY-P400YSM-A PUHY-P650YSM-A

20.0/-

7.0/6.0

400 400 332 455 455 254

406 229

8 8

20.0/-

7.0/6.0 8 8

54 55

57.8/52.9 62.3/57.0 380/415 380/415

50/60 50/60

92/84 101/93

2.83/0.65 2.84/0.64

81/83 82/83

00 00 00

-1/-1 -1/-1

31/31 32/31

37 37 76 76

400 400 332 332 259 254

406 229

PUHY-P1000YSGM-A

PUHY-P600YMM-A

PUHY-P400YSM-A

20.0/-

7.0/6.0 8 8

55.1/50.5 380/415

50/60

87/76

2.83/0.65

80/83

0 0 0

-1/-1

30/31

37 76

- 91 -

Page 94

Items

Outdoor unit

Ambient temp.

Indoor

DB/WB

Set type Main unit Sub unit

Outdoor Quantity Quantity in operation

Set

Indoor unit

Condition

Model –

Main pipe

Piping

Branch pipe

Total piping length Indoor unit fan notch – Refrigerant volume kg

Outdoor unit

Total current A Vo Vlts

Indoor unit

Pulse

LEV opening

SC (LEV1) (

✻1)

Pressure

High pressure (after O/S) /Low pressure (before accumulator)(✻1)

MPa

Discharge (TH11/TH12) Heat exchanger outlet (TH5)

Accumulator

Inlet

Outdoor unit (

✻1)

Outlet

Sectional temp.

Suction (Compressor)

˚C

Shell bottom (Compressor)

Indoor

LEV inlet

unit

Heat exchanger outlet

No.2 compressor frequency (50/60Hz) Hz

No.1 compressor frequency (50/60Hz) Hz

(✻1) Both for sub unit and the main unit

400 400 400 332 332 229

400 229

250 250 200 100 50 32

20025250 250 250

100 50 32

25032250 250 250

100 100 25

250

PUHY-P1200YSGM-A PUHY-P1250YSGM-A

PUHY-P550YMM-A PUHY-P600YMM-A

PUHY-P650YSM-A PUHY-P650YSM-A

20.0/-

7.0/6.0

400 400 332 332 373 254

332 229

8 8

20.0/-

7.0/6.0 8 8

55 55

67.0/61.4 71.9/65.8 380/415 380/415

50/60 50/60

113/105 120/115

2.85/0.63 2.85/0.63

84/83 85/83

-1 -1

-2/-2 -2/-2

34/31 35/31

38 38 77 77

400 400 400 332 373 254

400 254

PUHY-P1150YSGM-A

PUHY-P500YMM-A

PUHY-P650YSM-A

20.0/-

7.0/6.0 8 8

64.9/59.4 380/415

50/60

107/99

2.84/0.64

83/83

-1

-2/-2

33/31

38 77

- 92 -

Page 95

- 93 -

0403

(Note1)

Serial transmission abnormality

0900 Test run (LC) 1102 Discharge temperature abnormality 1301 Low pressure abnormality (OC) 1302 High pressure abnormality (OC) 1500 Overcharged refrigerant abnormality 2500 Leakage (water) abnormality 2502 Drain pump abnormality 2503 2600 2601

Drain sensor abnormality Water leakage (LC)

Water-supply cut (LC) 4103 4108

Reverse phase abnormality

Over-current protection (No.2 Comp) 4115 Power supply sync signal abnormality 4116 Fan speed abnormality (motor abnormality) (IC, LC)

4220 4225

(Note1)

[108] Bus Voltage drop abnormality (S/W detect) [109]

[01] [05]

Bus Voltage rise abnormality (S/W detect)

[110] Bus Voltage abnormality (H/W detect) [111] Logic error

4230 4235

(Note1)

Heat sink overheat protection 4240

4245

(Note1)

Overload protection

4250 4255

[101] IPM abnormality [102] ACCT over-current abnormality (H/W peak detect) [103](Note1) DCCT over-current abnormality (H/W peak detect) [104] IPM short/grounding abnormality [105] Load short abnormality [106] ACCT over-current abnormality (S/W detect peak current) [107] ACCT over-current abnormality (S/W detect effective current)

4260 4265

(Note1)

Cooling fan abnormality

[05]

[01]

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:OC)

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) 5106 Ambient temperature (TH6) 5107 SC coil outlet (TH7) 5108 SC coil bypass outlet (TH8)

5110

(Note1)

Heat sink (THHS)

5201 High pressure sensor abnormality (OC)

Check code Check content

Thermal sensor abnormality

[ ] : Error detail No.

Remarks

ªª

Troubleshooting

[1] Check Code List

1. Check Code List

Page 96

- 94 -

5301 5305

[115] ACCT sensor abnormality [116] DCCT sensor abnormality [117](Note1) ACCT sensor/circuit abnormality [118] DCCT sensor/circuit abnormality [119] IPM-open/ACCT connection abnormality [120] ACCT miss-wiring abnormality

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 abnormalit

Maintenance operation is possible. Maintenance operation is possible.

y 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 7101 Capacity code abnormality 7102 Error in the number of connected units 7105 Address setting abnormality 7106 Characteristics setting abnormality (LC) 7110 Connection number setting abnormality 7111 Remote control sensor abnormality 7113 Functional restriction error

7130 Di

7117 Unset model error

7116 System error before flashing operation

Maintenance operation is possible. Maintenance operation is possible.

(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

erent unit model error

The last digit Inverter address (system) Potential model

0 or 1 1 Compressor inverter system

5 5 Fan inverter system

Remarks

Page 97

- 95 -

Over-current protection ( [ P450-P650 model ] No.2 Comp)

1202 (1102) Preliminary discharge temperature abnormality or preliminary discharge thermal sensor abnormality (TH11)

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) 1402 (1302) Preliminary high pressure abnormality or preliminary pressure sensor abnormality 1600 (1500) Preliminary overcharged refrigerant abnormality

1605

4158 (4108)

Preliminary suction pressure abnormalit

Preliminary serial transmission abnormality

4300 (5301) 4305 (5305)

[115] Preliminary ACCT sensor abnormality [116] Preliminary DCCT sensor abnormality [117](Note1)

(Note1)

Preliminary ACCT sensor/circuit abnormality [118] Preliminary DCCT sensor/circuit abnormality [119] Preliminary IPM-open/ACCT connection abnormality [120]

[05]

[00]

(Note1)

1214 (5110)

[05]

[01]

(Note1)

4300 (0403)

Preliminary ACCT miss-wiring abnormality

4320 (4220) 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) 4335 (4235)

(Note1)

Preliminary heat sink overheating abnormality

4340 (4240) 4345 (4245)

(Note1)

Preliminary overload abnormality

4350 (4250) 4355 (4255)

[101] Preliminary IPM abnormality [102] Preliminary ACCT over-current abnormality (H/W peak detect) [103] Preliminary DCCT over-current abnormality (H/W peak detect) [104] Preliminary IPM short/grounding abnormality [105] Preliminary load short abnormality [106] Preliminary ACCT over-current abnormality (S/W detect peak current) [107] Preliminary ACCT over-current 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.

Example) Code 4225 → Bus voltage drop Error for fan inverter system Code 4250 → IPM / bus voltage fault Error for compressor inverter system

The last digit Inverter address (system) Potential model

0 or 1 1 Compressor inverter system

5 5 Fan inverter system

2. Intermittent fault check code (only for outdoor unit)

Page 98

The following operation is performed on the outdoor unit depending on the error type.

(✻1)

For more detail information on an emergency operation mode, refer to “¶ Control [2] Controlling the Outdoor Unit 11. Emergency operation mode”.

(✻2)

For the error that can be recovered by a maintenance operation, refer to the remarks column on “[1] Check Code List”.

When an emergency operation is valid (SW4-4: OFF)

and

an error occurs that can be recovered by an emergency operation

Reset the power source

Operation pattern

(mode)

Operation pattern

(mode)

Error stop Retry operation / Error stop Emergency operation / Error stop

Reset method

(after correcting

the error)

Emergency operation mode

(✻1)

Unit operation

Local remote

controller display

(air conditioner

in operation)

Switcah setting

and condition

Reset method

(after correcting

the error)

Unit operation

Local remote

controller display

(air conditioner

in operation)

Switcah setting

and condition

A retry operation is performed by resetting the local remote controller. The operation is limited by separating the error sources, and will be continued.

✻After a certain length of time, a normal

mode (error stop) will be performed.

“Error code” blinks during an emergency operation. (see figure2)

A retry operation is performed by resetting the local remote controller. (Check one more time whether the operation is possible.)

✻After a certain length of time, a normal

mode will be performed.

When the air conditioner makes an error stop during a retry operation, the operation lamp blinks, and “error code” and “unit number” blink. (see figure1)

An error occurs in an air conditioner, and the operation cannot be continued.

The operation lamp blinks, and “error code” and “unit number” blink. (see figure1)

An error occurs that can be recovered

by a maintenance operation

(✻2)

Maintenance operation

Maintenance operation mode

An error occurs in an air conditioner, the operation is limited, and will be continued.

“Error code” blinks. (see figure2)

It recovers from the error automatically or reset the local remote controller or the power source.

When an emergency operation is valid

(SW4-4: OFF)

and

an error occurs that can be recovered

by an emergency operation

Error stop mode

An error occurs in an air conditioner, and the operation cannot be continued.

The operation lamp blinks, and “error code” and “unit number” blink. (see figure1)

Reset the local remote controller or the power source.

Figure1 Figure2

Unit number

Error code

Operation lamp (blinks)

Error code

ERROR CORD

CHECK

ON/OFF

˚C

ERROR CORD

ON/OFF

- 96 -

Page 99

- 97 -

[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.

1102 Discharge

temperature abnormality (Outdoor 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.

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.

(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.

(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.

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.

Check operation status of cooling-only or heating-only.

Check resistance of thermistor.

Check inlet temperature of sensor with LED monitor.

(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.

(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.

(3) Transformer failure. Measure voltages between pins

1 and 3 of the FAN board connector CNTR.

✻ For the check code on the inverter, refer to “ 6. Inverter and compressor ” in the section [4] “ Troubleshooting of principal parts ”

Page 100

- 98 -

Checking code

1301

Meaning, detecting method Cause

Checking method & Countermeasure

Low pressure abnoramlity

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.

1302 High pressure

abnoramlity 1 (Outdoor 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.

(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 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.

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.

-1.5