Mitsubishi Electric PUHY-P200 Come usare

Models PUHY-P200, P250, P300, P350, P400YGM-A

PUHY-P450, P500, P550, P600, P650YGM-A

PUY-P200, P250, P300, P350YGM-A

Service Handbook

AIR CONDITIONERS CITY MULTI

Contents

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

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

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

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

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

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

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

[7]

Airtightness Test

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

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

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

[

] Changing Refrigerant.............................................................. 15

[

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

[

]

Characteristics of the Conventional and the New Refrigerants

.. 16

[

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

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

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

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

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

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

3Components of the Outdoor Unit ................................................ 37

[1] Appearance of the Components and Refrigerant Circuit........ 37

[2] Control Box ............................................................................ 43

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

4Remote 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

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

[1]

PUHY-P200, P250, P300, P350, P400YGM-A / PUY-P200, P250, P300, P350YGM-A

.. 55

[2]

PUHY-P450, P500, P550, P600, P650YGM-A

.............................. 56

[3]

Power Dispatching Extension Unit for the Transmission Lines

........ 57

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

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

[2] Functions of Principal Parts.................................................... 62

7Control.......................................................................................... 64

[1] Dip Switch Functions and Their Factory Settings .................. 64

[2] Controlling the Outdoor Unit .................................................. 69

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

8Test 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

9Troubleshooting............................................................................ 95

[1] Check Code List .................................................................... 95

[2] Responding to Error Display on the Remote Controller ........ 98

[3] Investigation of Transmission Wave Shape/Noise .................. 131

[4] Troubleshooting of Principal Parts .......................................... 134

[5] Refrigerant Leak .................................................................... 151

[6]

Compressor Replacement Instructions (only P450-P650 types)

.... 153

[7]

Collecting the Cooling Liquid from the Accumulator (Only P450-P650 types)

.. 154

0LED display .................................................................................. 155

[1] LED Monitor Display .............................................................. 155

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 -

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 -

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 -

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 heat-

source unit, use a four-point suspension. A three-

point 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 -

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 -

- 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 dryers may result in malfunctions.

✻Replace the dryer after completing all the repairs on the refrigerant circuit.

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

the old one.)

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

(1) Do not leave the refrigerant circuit longer than 2 hours.

(2) Cover the opening end with a cap or tape to keep moisture from entering.

(3) Also cover the opening end of the new part with a cap or tape

(4) Do not perform the task in the rain.

(5) Evacuate the refrigerant circuit as specified.

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

moved or replaced.

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

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

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

7. If there is a gas leak or if the remaining refrigerant is exposed to an open flame, a noxious gas

hydrofluoric acid may form. Keep workplace well ventilated.

CAUTION

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

2. Chloride in some types of refrigerants such as R22 will cause the refrigerating machine oil to

deteriorate.

- 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

Refrigerant recovery

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.

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

1/4”

3/8”

1/2”

5/8”

3/4”

7/8”

1”

1 1/8”

1 1/4”

0.8t

1.0t

1.1t

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

ants, use type-1/2H pipes for units that use R410A. (Type-O pipes may be used if the pipe size is ø19.05 and

the radial thickness is 1.2t.)

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

standards.

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