Mitsubishi HWE08050 Service Manual

Models

PWFY-P100VM-E-BU
PWFY-P100, P200VM-E-AU

Service Handbook

Contents

1 Read Before Servicing ................................................................ 7

[1] Items to Be Checked .............................................................. 7

[2] Necessary Tools and Materials .............................................. 8

[3] Piping Materials ...................................................................... 9

[4] Storage of Piping .................................................................... 11

[5] Piping Processing .................................................................. 11

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

[7]

Air tightness Test

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

[8] Vacuum Drying (Evacuation) .................................................. 14

[9] Refrigerant Charging .............................................................. 15

[10] Remedies to be taken in case of a Refrigerant Leak ............ 15

[11]

Characteristics of the Conventional and the New Refrigerants

.. 16

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

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

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

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

[3] Examples of system connection ............................................ 20

[4] Restrictions on piping length .................................................. 20

3 Components of the Unit .............................................................. 21

[1] Appearance of the Components and Refrigerant Circuit........ 21

[2] Control Box ............................................................................ 22

[3] Circuit Board .......................................................................... 23

4 Remote Controller........................................................................ 26

[1]

Functions and Specifications of MA Remote Controller

.................. 26

[2]

Interlocking Setting via the MA Remote Controller

........................ 27

5 Electrical Wiring Diagram ............................................................ 29

[1] PWFY-P100VM-E-BU ............................................................ 29

[2] PWFY-P100, 200VM-E-AU .................................................... 30

6 Refrigerant Circuit ........................................................................ 31

[1] Refrigerant Circuit Diagram .................................................... 31

[2] Functions of Principal Parts.................................................... 32

7 Control.......................................................................................... 34

[1] Dip Switch Functions and Their Factory Settings .................. 34

8 Test Run ...................................................................................... 37

[1] Check Items before Test Run.................................................. 37

[2] Test Run Method .................................................................... 37

[3] Refrigerant .............................................................................. 37

[4] Symptoms that do not Signify Problems ................................ 38

[5] Standard operation data ........................................................ 38

9 Troubleshooting............................................................................ 39

[1] Check Code List .................................................................... 39

[2] Responding to Error Display on the Remote Controller ........ 40

[3] Troubleshooting Principal Parts .............................................. 56

[4] Maintenance .......................................................................... 70

0 LED display.................................................................................. 74

[1] LED Monitor Display .............................................................. 74

Do not use steel pipes as water pipes.

Copper pipes are recommended.

The water circuit should be a closed circuit.

Do not touch the refrigerant pipes and Water
pipes.

Improper handling may result in injury.

Safety Precautions

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

WARNING

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

the risk of serious injury or death.

CAUTION

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

the risk of serious injury or damage to the unit.

After reading this manual, give it to the user to retain for future reference.

Keep this manual for easy reference. When the unit is moved or repaired, give this manual to those who provide these
services.
When the user changes, make sure that the new user receives this manual.

WARNING

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

- 1 -

WARNING

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

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

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

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

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

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

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

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

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

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

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

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

Only use accessories recommended by MITSUBISHI.

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

Control box houses high-voltage parts.

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

- 2 -

Precautions for handling units for use with R410A

CAUTION

Do not use the existing refrigerant piping.

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

R410A is a high-pressure refrigerant and can cause the
existing pipes to burst.

Use refrigerant pipes made of phosphorus deoxidized
copper. Keep the inner and outer surfaces of the pipes
clean and free of such contaminants as sulfur, oxides,
dust, dirt, shaving particles, oil, and water.

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

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

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

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

Infiltration of a large amount of mineral oil may cause the re­frigerating machine oil to deteriorate.

Charge liquid refrigerant (as opposed to gaseous re­frigerant) into the system.

If gaseous refrigerant is charged into the system, the com­position of the refrigerant in the cylinder will change and
may result in performance loss.

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

If a vacuum pump that is not equipped with a reverse-flow
check valve is used, the vacuum pump oil may flow into the
refrigerant cycle and cause the refrigerating machine oil to
deteriorate.

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

If the refrigerant or the refrigerating machine oil left on
these tools are mixed in with R410A, it may cause the re­frigerating machine oil to deteriorate.

Infiltration of water may cause the refrigerating machine
oil to deteriorate.

Gas leak detectors for conventional refrigerants will not
detect an R410A leak because R410A is free of chlorine.

Do not use a charging cylinder.

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

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

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

Only use refrigerant R410A.

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

- 3 -

Before installing the unit

WARNING

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

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

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

The unit is not designed to preserve food products.

Do not use the unit in an unusual environment.

Do not install the unit where a large amount of oil or steam
is present or where acidic or alkaline solutions or chemical
sprays are used frequently. Doing so may lead to a re­markable drop in performance, electric shock, malfunc­tions, smoke, and/or fire.

The presence of organic solvents or corrosive gas (i.e.
ammonia, sulfur compounds, and acid) may cause gas
leakage or water leakage.

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

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

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

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

- 4 -

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

electrical work

CAUTION

Properly ground the unit.

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

Do not put tension on the power supply wires.

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

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

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

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

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

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

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

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

Otherwise, electric shock and/or fire may result.

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

Periodically check the installation base for damage.

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

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

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

Exercise caution when transporting products.

Products weighing more than 20 kg should not be carried

alone.

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

some products.

Properly dispose of the packing materials.

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

injury.

Plastic bags may pose a risk of choking hazard to chil­dren. Tear plastic bags into pieces before disposing of
them.

- 5 -

Before the test run

CAUTION

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

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

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

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

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

Do not operate the unit without panels and safety
guards.

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

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

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

Do not operate the unit without the air filter.

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

- 6 -

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

Between unit and BC controller

PWFY-P100VM-E-BU

Inside the unit

R410A

-

PWFY-P100, 200VM-E-AU

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

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

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

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

Refer to "Necessary Tools and Materials" for information on the use of tools.(page 8)

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

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

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

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

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

CAUTION

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

R410A
R134A

- 7 -

¡¡

Read Before Servicing

[2] Necessary Tools and Materials

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

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

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

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

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

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

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

setoNesUslairetaM/slooT

c tnaregirfer dna noitaucavEdlofinaM eguaG harging Higher than 5.09MPa[738psi] on the

high-pressure side

igrahc tnaregirfer dna noitaucavEesoH gnigrahC ng The hose diameter is larger than the

conventional model.

Refrigerant Recovery Cylinder Refrigerant recovery

hTgnigrahc tnaregirfeRrednilyC tnaregirfeR e refrigerant type is indicated. The

cylinder is pink.

Charging Port on the Refrigerant Cylinder Refrigerant chargingThe charge port diameter is larger

than that of the current port.

tiw tinu eht fo noitcennoCtuN eralFh the pipes Use Type-2 Flare nuts.

setoNesUslairetaM/slooT

noitceted kael saGrotceteD kaeL saG The ones for use with HFC refrigerant

may be used.

retpada evlav kcehc a fi desu eb yaMgniyrd muucaVpmuP muucaV

is attached.

eht rof snoisnemid gnissecorp eralFgnissecorp eralFlooT eralF
piping in the system using the new re­frigerant differ from those of R22. Re­fer to next page.

Refrigerant Recovery Equipment Refrigerant recovery

May be used if compatible with R410A
or R134a

setoNesUslairetaM/slooT

Vacuum Pump with a Check Valve Vacuum drying

sepip gnidneBredneB

snoisnemid gnissecorp eralf eht ylnOstun eralf gninethgiThcnerW euqroT
for pipes that have a diameter of
ø12.70 (1/2") and ø15.88 (5/8") have
been changed.

sepip gnittuCrettuC epiP

Welder and Nitrogen Cylinder Welding pipes

Refrigerant Charging Meter Refrigerant charging

kcehc level muucaVeguaG muucaV

setoNesUslairetaM/slooT

esu ot detibihorPgnigrahc tnaregirfeRrednilyC gnigrahC

- 8 -

[3] Piping Materials

1. Copper pipe materials

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

selves.

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

2. Types of copper pipes

3. Piping materials/Radial thickness

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

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

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

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

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

at the same radial thickness.

Maximum working pressure Refrigerant type

4.30 MPa [624psi] R410A and R134a

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

ø6.35 [1/4"] 0.8t

O-material (Annealed)

ø9.52 [3/8"] 0.8t

ø12.7 [1/2"] 0.8t

ø15.88 [5/8"] 1.0t

ø19.05 [3/4"] 1.0t

1/2H-material,

H-material (Drawn)

ø22.2 [7/8"] 1.0t

ø25.4 [1"] 1.0t

ø28.58 [1-1/8"] 1.0t

ø31.75 [1-1/4"] 1.1t

ø34.93 [1-3/8"] 1.1t

ø41.28 [1-5/8"] 1.2t

Do not use the existing piping!

- 9 -

- 10 -

4. Thickness and refrigerant type indicated on the piping materials

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

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

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

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

6. Flare nut

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

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

Flare processing dimensions (mm[in])

Pipe size (mm[in]) A dimension (mm)

ø6.35 [1/4"] 9.1

ø9.52 [3/8"] 13.2

ø12.7 [1/2"] 16.6

ø15.88 [5/8"] 19.7

ø19.05 [3/4"] 24.0

Flare nut dimensions (mm[in])

Pipe size (mm[in]) B dimension (mm)

ø6.35 [1/4"] 17.0

ø9.52 [3/8"] 22.0

ø12.7 [1/2"] 26.0

ø15.88 [5/8"] 29.0

ø19.05 [3/4"] 36.0

Dimension A

Dimension B

[4] Storage of Piping

1. Storage location

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

2. Sealing the pipe ends

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

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

[5] Pipe Processing

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

Use a minimum amount of oil.

Use only ester oil, ether oil, and alkylbenzene.

- 11 -

[6] Brazing

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

Example: Inside the brazed connection

1. Items to be strictly observed

Do not conduct refrigerant piping work outdoors if raining.

Use non-oxidized solder.

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

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

2. Reasons

The new refrigerating machine oil is 10 times as hygroscopic as the conventional oil and is more likely to cause unit failure if
water infiltrates into the system.

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

3. Notes

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

esUgnizarb rof redlos dezidixo fo esU of non-oxidized solder for brazing

- 12 -

[7] Air T ightness Test

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

1. Items to be strictly observed

Pressurize the equipment with nitrogen up to the design pressure (4.15MPa[601psi]), and then judge the equipment's air tight­ness, taking temperature variations into account.

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

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

2. Reasons

Oxygen, if used for an air tightness test, poses a risk of explosion. (Only use nitrogen to check air tightness.)

Refrigerant R410A must be charged in its liquid state. If gaseous refrigerant in the cylinder is drawn out first, the composition
of the remaining refrigerant in the cylinder will change and become unsuitable for use.

3. Notes

Procure a leak detector that is specifically designed to detect an HFC leak. A leak detector for R22 will not detect an
HFC(R410A, R407C) leak.

rotceted egakael 22Rhcrot edilaH

- 13 -

[8] Vacuum Drying (Evacuation)

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

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

2. Standard of vacuum degree (Photo 2)

Use a vacuum pump that attains 0.5Torr(6 5Pa) or lower degree of vacuum after 5 minutes of operation, and connect it directly
to the vacuum gauge. Use a pump well-maintained with an appropriate lubricant. A poorly maintained vacuum pump may not
be able to attain the desired degree of vacuum.

3. Required precision of vacuum gauge

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

4. Evacuation time

After the degree of vacuum has reached 5Torr(650Pa), evacuate for an additional 1 hour. (A thorough vacuum drying re­moves moisture in the pipes.)

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

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

5. Procedures for stopping vacuum pump

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

6. Special vacuum drying

When 5Torr(650Pa) or lower degree of vacuum cannot be attained after 3 hours of evacuation, it is likely that water has pen­etrated the system or that there is a leak.

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

0.5kgf/cm

2

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

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

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

01041 )2otohP(H01051 )1otohP(

Recommended vacuum gauge:
ROBINAIR 14010 Thermistor Vacuum Gauge

- 14 -

[9] Refrigerant Charging

1. Reasons

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

2. Notes

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

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

If the refrigerant leaks out, it may be replenished. The entire refrigerant does not need to be replaced. (Charge refrigerant in the
liquid state.)

Cylinder with a siphon

etats diuqil eht ni gnigrahc tnaregirfeR.knip si A014R roloc rednilyC

Cylin­der

liquid

evlaVevlaV

liquid

Cylin­der

Cylinder without a siphon

- 15 -

[11] Characteristics of the Conventional and the New Refrigerants

1. Chemical property

As with R22, refrigerants R410A and R134A are low in toxicity and chemically stable nonflammable refrigerants.
However, because the specific gravity of vapor refrigerant is greater than that of air, leaked refrigerant in a closed room will
accumulate at the bottom of the room and may cause hypoxia.
If exposed to an open flame, refrigerant will generate poisonous gases. Do not perform installation or service work in a con­fined area.

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

2

is used as a reference

2. Refrigerant composition

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

3. Pressure characteristics

R410A has slightly higher operating pressure compared with R22.

New Refrigerant (HFC type)

R410A

R32/R125

)05/05()%tw( noitisopmoC

ciportoeza-oduesPtnaregirfeR fo epyT

Refrigerant

dedulcni toNedirolhC

1A/1AssalC ytefaS

6.27thgieW raluceloM

-/4.15-)F/C( tnioP gnilioB 60.5

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

1.557/226

Saturated Steam Density
(25 C,kg/m

3

/77 F, psi)

64.0

elbammalfnoNytilibammalF

Ozone Depletion Coefficient (ODP)

*1

0

Global Warming Coefficient (GWP)

*2

1730

Refrigerant Charging Method Refrigerant charging in

the liquid state

Replenishment of Refrigerant after a Refrigerant
Leak

Available

Temperature ( C/ F )

Pressure (gauge)

R410A R134a R22

MPa/psi MPa/psi MPa/psi

-20/-4 0.30/44 0.13/19 0.14/20

0/32 0.70/102 0.29/42 0.40/58

20/68 1.34/194 0.57/83 0.81/117

40/104 2.31/335 1.02/148 1.44/209

60/140 3.73/541 1.68/244 2.33/338

65/149 4.17/605 1.89/274 2.60/377

R134a

R134a

(100)

Single-

Refrigerant

Not contained

A1/A1

102.0

-26.1/-15.0

0.67/97

32.3

Non-flammable

0

1300

Liquid charging

Possible

- 16 -

- 17 -

[12] Notes on Refrigerating Machine Oil

1. Refrigerating machine oil in the HFC refrigerant system

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

2. Effects of contaminants

*1

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

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

Refrigerant Refrigerating machine oil

HAB

Ester oil

R134a

R410A

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

stceffEsmotpmySesuaC on the refrigerant cycle

evlav noisnapxe nezorFnoitartlifni retaW

and capillary tubes

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

Hydrolysis

Sludge formation and ad­hesion
Acid generation
Oxidization
Oil degradation

Air infiltration Oxidization

Infiltration of
contaminants

Dust, dirt

Adhesion to expansion valve and capillary
tubes

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

Infiltration of contaminants into the com­pressor

Burn-in on the orbiting scroll

Mineral oil
etc.

Sludge formation and adhesion Clogged expansion valve and capillary tubes

Poor cooling performance
Compressor overheat

llorcs gnitibro eht no ni-nruBnoitadarged liO

Unit Unit

Unit

Remote

BC controller

controller

2-core cable

2-core cable

Remote

controller

Unit

Multiple-

core cable

BC controller

PWFY-P100VM-E-BU

Type of cable

Cable diameter

Remarks

Transmission cables

Shielding wire (2-core)

CVVS, CPEVS or MVVS

More than 1.25 mm

2

-

MA Remote controller cables

Sheathed 2-core cable (shielded)

CVVS

0.3 ~ 1.25 mm2 (0.75 ~ 1.25 mm2)*1

Max.length: 200 m

External input

Sheathed multi-core cable (shielded)

CVVS or MVVS

0.3 ~ 0.5 mm

2

Max.length: 100 m

External output

Sheathed multi-core cable (unshielded)

CVV or MVV

0.3 ~ 1.25 mm

2

Rated voltage: L1-N: 220 ~

240 V

Rated load: 0.6 A

PWFY-P100/200VM-E-AU

Type of cable

Cable diameter

Remarks

Transmission cables

Shielding wire (2-core)

CVVS, CPEVS or MVVS

More than 1.25 mm

2

-

MA Remote controller cables

Sheathed 2-core cable

CVV (unshielded)

0.3 ~ 1.25 mm2 (0.75 ~ 1.25 mm2)*1

Max.length: 200 m

External input

Sheathed multi-core cable
CVV or MVV (unshielded)

0.3 ~ 0.5 mm

2

Max.length: 100 m

External output

Sheathed multi-core cable (unshielded)

CVV or MVV

0.3 ~ 1.25 mm

2

Rated voltage: L1-N: 220 ~

240 V

Rated load: 0.6 A

*1 Connected with simple remote controller. CVVS, MVVS: PVC insulated PVC jacketed shielded control cable

CVV, MVV

: PVC insulated PVC sheathed control cable

CPEVS :

PE insulated PVC jacketed shielded communication cable

[1] Types and Maximum allowable Length of Cables

1. Wiring work
(1) Notes

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

2) Install external transmission cables at least 5cm [1-31/32"] away from the power supply cable to avoid noise interference.
(Donot put the control cable and power supply cable in the same conduit tube.)

3) Provide grounding for the outdoor unit as required.

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

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

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

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

(2) Control wiring

Types and maximum allowable length of cables

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

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

- 18 -

™™

Restrictions

00

Main

00

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

Unit or controller

Address

Setting method

setting range

Unit Main/sub units

MA remote controller

Outdoor unit

0, 01~50

(Note 1)

0, 51~100

(Note 1, 2, 3)

52~100

(Note 2, 3)

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.

Notes:

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

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

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

4. BC controller is found only in the R2 systems.

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

BC controller (Sub)

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

BC controller (Main)

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.
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)

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

Various start-stop controls (Unit settings)
Each unit (or group of units) can be controlled individually by setting SW 1-3 and 1-4.

(3)

Unit port switch setting (R2 series (Factory Setting: “0”))
Make the settings for the port switch that corresponds to the connected BC (Main/Sub) controller.
When more than two ports are used, make the setting on the port with a smaller port number.

(2)

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

Function

Setting (SW1) (Note 2)

Power ON/OFF by the
plug (Note 1)

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

Unit will remain stopped regardless of its operation status before power off
(power failure).

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

34

OFF OFF

ON ON

OFF ON

(Note 1) Do not cut off power to the outdoor unit.

Cutting off the power supply to the outdoor unit will cut off the power supply to the crankcase heater and may cause the
compressor to malfunction when the unit is put back into operation.

(Note 2) Requires that the dipswitch settings for all the units in the group be made.

Automatic restoration
after power failure

- 19 -

[2] Types of Switch Setting and Address Setting

1. Switch setting

2. Address setting

• Connect the “1” and “2” on unit TB15 to a MA remote controller. (Non-polarized 2-wire)
MA Remote controller

TB02

TB15

earth cable
(shielded)

TB5

SM1M2 SM1M2

TB3

M1M2

(A) (B) (C)

(D)

(E)

(E)

1 2S

TB15TB5

SM1M2 1 2

(shielding wire)

(A) Outdoor unit
(B) BC controller
(C) PWFY-P100VM-E-BU
(D) PWFY-P100, 200VM-E-AU
(E) MA remote controller

• DC 10 to 13 V between 1 and 2 (MA remote controller)

• The MA remote controller cannot be used at the same time or interchangeably.

Note:

Ensure that the wiring is not pinched when fitting the terminal box cover. Pinching the wiring may cut it.

Caution:

• Use wire with supplemental insulation.

• Input to TB142A, TB142B, and TB142C should not carry voltage.

• Cables from equipment connected to external input/output should have supplemental insulation.

• Use a single multiple-core cable for external input/output to allow for connection to the PG screw.

Caution:

Wire the power supply so that no tension is imparted. Otherwise disconnection, heating or fire result.

(B)

(A)

S

2

1

L

N

DC10~13V

12

AB

(C)

S

M2

M1

(D)

(E)

2

S

M2

M1

(A)

(B)

(D)

(E)

1

L

N

DC10~13V

AB
12

(C)

(A) Non-polarized
(B) TB15 (MA remote controller cables)
(C) MA remote Controller
(D) TB5 (Transmission cables)
(E) TB2 (Power supply wiring)

PWFY- P100VM-E-BU PWFY- P100, 200VM-E-AU

- 20 -

[3] Examples of system connection

1. Connecting remote controller, indoor and outdoor transmission cabls

• Connect unit TB5 and outdoor unit TB3. (Non-polarized 2-wire (shield))
The “S” on unit TB5 is a shielding wire connection. For specifications about the connecting cables, refer to

the outdoor unit installation manual.

• Install a remote controller following the manual supplied with the remote controller.

2. System using MA remote controller

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

[4] Restrictions on piping length

The same piping length restrictions apply as the ones that apply to the conventional indoor units.
Refer to the Service Manual that came with the outdoor unit for restrictions on piping length.

Design the water piping system so that the total amount of water held in the system is 100 liter or less.

Heat exchanger assy

Pressure sensor (63LS)

Pressure switch (63H1)

Pressure sensor (63HS)

Thermistor (TH11)

Check joint

Compressor

Heat exchanger assy

Linear expansion valve
Linear expansion valve coil
(LEV2W)

Linear expansion valve
(LEV1W)

Thermistor (TH8)

Thermistor (TH6)

Thermistor (TH22)

Thermistor (TH13)

- 21 -

££

Components of the Unit

[1] Appearance of the Components and Refrigerant Circuit

< PWFY-P100VM-E-BU >

Heat exchanger assy

Solenoid valve

Solenoid valve coil (SV)

Thermistor (TH6,TH22)

Check valve

Linear expansion valve
(LEV1Wa,b)

Thermistor (TH8,TH23)

< PWFY-P100, 200VM-E-AU >

- 22 -

Thermistor (THHS)

INV board

Fan

Noise filter

Te r minal block
(TB2)

Te r minal block
(TB5)

Te r minal block (TB15)

Control board

Fuse

Reactor

Tr ansformer

Fuse

Control board

Te r minal block assy (TB5)

Te r minal block assy (TB15)

DSA board

Te r minal block assy
(TB2)

[2] Control Box

< PWFY-P100VM-E-BU >

< PWFY-P100, 200VM-E-AU >

- 23 -

TB141A

(OUT1)

TB141A, TB142A, TB142B, TB142C : Refer to 5 Electrical Wiring Diagram

TB142A

(IN1)

TB142A

(IN2)

TB142B

(IN3)

TB142B

(IN4)

TB142C

(IN5)

TB142C

(IN6)

TB142C

(IN7)

TB142C

(IN8)

TB142C

(COM

+

)

TB141B

SW5 SW1 SW3

SW2 SW4

SWU1

SWU2

CNLVC

CNLVB

CNLVA

CN2

CN4

CN52C

CN506A,B

CN501

CN507

CNAC

F01CN631CN661

(63H1)

F631SWP3SWP2SWP1CN3TLED3

LED4

LED1

CN2M

CN422

CN421

CN401

CN402

CN403

CN404

CN405

CN63LS

CN63HS

CN3A

SWU3

TB141A

(OUT2)

TB141A

(OUT3)

TB141A

(OUT4)

[3] Circuit Board

1. Main board

< PWFY-P100VM-E-BU, PWFY-P100, 200VM-E-AU >

- 24 -

CN5

U

V

LD9

LD2

LD1

W

R

S

CN4 CN3 CN2

2. Power board

< PWFY-P100VM-E-BU >

- 25 -

CN5

CN52C

LO

CNAC2

E3

LI

NI

E2 E1 CNAC1

NO

3. Noise filter

CN1

4. DSA

< PWFY-P100VM-E-BU >

< PWFY-P100,200VM-E-AU >

- 26 -

Function/specification

Remote controller address setting Not required

Indoor/outdoor unit address setting Not required (required only by a system with one outdoor unit)

Wiring method Non-polar 2 wires

✻ Daisy-chain the units with non-polar 2 wires when running

a group operation.

Installation location of remote controller Connectable to any unit in the group

Making group changes MA remote controller wires between units require rewiring.

MA remote controller

¢¢

Remote Controller

[1] Functions and Specifications of MA Remote Controller

MA remote controller is connected to each unit.

- 27 -

[2] Interlocking Setting via the MA Remote Controller

1. Remote controller function selection via the MA remote controller

Item 3 (Setting content)

• Display in multiple languages is possible

• Setting the range of operation limit (operation lock)

• Setting the use or non-use of each operation mode

• Setting the temperature adjustable range (maximum, minimum)

• Selecting main or sub remote controller
* When two remote controllers are connected to one group, one

controller must be set to sub.

• Setting the use or non-use of clock function

• Setting the timer type

• Contact number display in case of error

• Setting the telephone number

• Setting the use or non-use of setback amount setting

• Setting the temperature unit (

˚C or ˚ F) to display

• Setting the use or non-use of the display of water temperature

Function selection of remote controller

The setting of the following remote controller functions can be changed using the remote controller function selection mode. Change the setting when needed.

Item 1

1. Change Language
(“CHANGE
LANGUAGE”)

2. Function limit
(“FUNCTION
SELECTION”)

3. Mode selection
(“MODE SELEC­TION”)

4. Display change
(“DISP MODE
SETTING”)

Item 2

Language setting to display

(1) Operation function limit setting (operation lock) (“LOCKING

FUNCTION”)

(2) Operation mode skip setting (“SELECT MODE”)

(3) Temperature range limit setting (“LIMIT TEMP FUNCTION”)

(1) Remote controller main/sub setting (“CONTROLLER MAIN/

SUB”)

(2) Use of clock setting (“CLOCK”)

(3) Timer function setting (“WEEKLY TIMER”)

(4) Contact number setting for error situation (“CALL.”)

(5) Temp off set setting (“TEMP OFF SET FUNCTION”)

(1) Temperature display

˚C/˚ F setting (“TEMP MODE ˚C/˚ F”)

(2) Water temperature display setting (“WATER TEMP DISP

SELECT”)

(Hold down the E button and press the D button for two
seconds.)
* The display cannot be changed during the test run and

the self diagnosis.

(Hold down the E button and press
the D button for two seconds.)
* The remote controller records the

setting that is made in this way.

Press the
G button.

See [3]–1

Item 3

(Setting content)

See [3]–2. (1)

See [3]–2. (2)

See [3]–2. (3)

See [3]–3. (1)

See [3]–3. (2)

See [3]–3. (3)

See [3]–3. (4)

See [3]–3. (5)

See [3]–4. (1)

See [3]–4. (2)

Item 1 Remote Controller Function

Selection Mode

Item 2

Normal display (Display when
the unit is not running)

Change Language

(“CHANGE LANGUAGE”)

Function limit

(“FUNCTION

SELECTION”)

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

Press the G button.

Press the
E button.

Press the
D button.

Operation function limit setting (“LOCKING FUNCTION”)

Press the G button.

Temperature range limit setting (“LIMIT TEMP FUNCTION”)

Dot display
The language that is selected in
CHANGE LANGUAGE mode ap­pears on this display. English is
set in this manual.

Mode selection

(“MODE

SELECTION”)

Display change

(“DISP MODE

SETTING”)

Press the
E button.

Press the
E button.

Press the
E button.

Press the
G button.

Press the
G button.

Operation mode skip setting (“SELECT MODE”)

Press the
D button.

Temperature display ˚C/˚F setting (“TEMP MODE ˚C/˚F”)

Press the G button.

Water temperature display setting (“WATER TEMP DISP SELECT”)

Press the
D button.

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

Press the G button.

Timer function setting (“WEEKLY TIMER”)

Use of clock setting (“CLOCK”)

Temp off set setting (“TEMP OFF SET FUNCTION”)

Contact number setting for error situation (“CALL.”)

Function selection flowchart

[1] Stop the unit to start remote controller function selection mode. [2] Select from item 1. [3] Select from item 2. [4] Make the setting. (Details are specified in item

3) [5] Setting completed. [6] Change the display to the normal one. (End)

F

TEMP.

MENU

ON/OFF

E

BACK DAY

PAR-W21MAA

G

MONITOR/SET

CLOCK CLEAR

C

INITIAL SETTING

CHECK TEST

D

ON/OFF

CIR.WATER

H

I

A

B