Toshiba MMU-P0151H, MMU-P0301H, MMU-P0181H, MMU-P0241H, MMU-P0361H Service Manual

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SERVICE MANUAL

FILE NO. A02-009

Indoor Unit

<4-way Air Discharge Cassette Type>

MMU-P0121H, P0151H, P0181H, P0241H, MMU-P0301H, P0361H, P0481H

<2-way Air Discharge Cassette Type>

MMU-P0071WH, P0091WH, P0121WH, MMU-P0151WH, P0181WH, P0241WH, MMU-P0301WH, P0361WH, P0481WH

<1-way Air Discharge Cassette Type>

MMU-P0091SH, P0121SH, P0151SH, MMU-P0181SH, P0241SH

MMD-P0071BH, P0091BH, P0121BH, MMD-P0151BH, P0181BH, P0241BH, MMD-P0301BH, P0361BH, P0481BH

MMD-P0181H, P0241H, P0361H, MMD-P0481H, P0721H, P0961H

MMC-P0151H, P0181H, P0241H, MMC-P0361H, P0481H

MMK-P0091H, P0121H, P0151H, MMK-P0181H, P0241H

MML-P0091H, P0151H, P0181H, MML-P0241H

MML-P0091BH, P0151BH, MML-P0181BH, P0241BH

Outdoor Unit

Cooling Only Model

MMY-MP0801T8, MP1001T8

<Fixed-Speed Unit>

MMY-MP06018, MP08018 MMY-MP10018

Heat Pump Model

MMY-MP0801HT8, MP1001HT8

<Fixed-Speed Unit>

MMY-MP0601H8, MP0801H8 MMY-MP1001H8

Heat Pump Model

MMY-MP0801HT7, MP1001HT7

<Fixed-Speed Unit>

MMY-MP0601H7, MP0801H7 MMY-MP1001H7

PRINTED IN JAPAN, May.,2002 ToMo

WARNINGS ON REFRIGERANT LEAKAGE

Check of Concentration Limit

The room in which the air conditioner is to be installed requires a design that in the event of refrigerant gas leaking out, its concentration will not exceed a set limit.

The refrigerant R407C which is used in the air conditioner is safe, without the toxicity or combustibility of ammonia, and is not restricted by laws to be imposed which protect the ozone layer. However, since it contains more than air, it poses the risk of suffocation if its concentration should rise excessively. Suffocation from leakage of R407C is almost non-existent. With the recent increase in the number of high concentration buildings, however, the installation of multi air conditioner systems is on the increase because of the need for effective use of floor space, individual control, energy conservation by curtailing heat and carrying power etc. Most importantly, the multi air conditioner system is able to replenish a large amount of refrigerant compared with conventional individual air conditioners. If a single unit of the multi conditioner system is to be installed in a small room, select a suitable model and installation procedure so that if the refrigerant accidentally leaks out, its concentration does not reach the limit (and in the event of an emergency, measures can be made before injury can occur). In a room where the concentration may exceed the limit, create an opening with adjacent rooms, or install mechanical ventilation combined with a gas leak detection device. The concentration is as given below.

Total amount of refrigerant (kg)

Min. volume of the indoor unit installed room (m³)

≤ Concentration limit (kg/m³)

The concentration limit of R407C which is used in multi air conditioners is 0.3kg/m³.

NOTE 1 :

If there are 2 or more refrigerating systems in a single refrigerating device, the amounts of refrigerant should be as charged in each independent device.

e.g., charged amount (10kg)

Room A Room B Room C Room D Room E Room F

For the amount of charge in this example:

The possible amount of leaked refrigerant gas in rooms A, B and C is 10kg. The possible amount of leaked refrigerant gas in rooms D, E and F is 15kg.

Outdoor unit

e.g., charged amount (15kg)

Indoor unit

Important

NOTE : 2

The standards for minimum room volume are as follows.

(1) No partition (shaded portion)

(2) When there is an effective opening with the

adjacent room for ventilation of leaking refrigerant gas (opening without a door, or an opening 0.15% or larger than the respective floor spaces at the top or bottom of the door).

Outdoor unit

Refrigerant tubing

Indoor unit

(3) If an indoor unit is installed in each partitioned

room and the refrigerant tubing is interconnected, the smallest room of course becomes the object. But when a mechanical ventilation is installed interlocked with a gas leakage detector in the smallest room where the density limit is exceeded, the volume of the next smallest room becomes the object.

Refrigerant tubing

Outdoor unit

Very small room

Small room

Mechanical ventilation device - Gas leak detector

Medium room

Large room

NOTE 3 :

The minimum indoor floor area compared with the amount of refrigerant is roughly as follows: (When the ceiling is 2.7m high)

Range below the

m²

density limit of 0.3 kg/m³

(countermeasures not needed)

25 20 15 10

Min. indoor floor area

10 20 30

Total amount of refrigerant

Range above the density limit of 0.3 kg/m³ (countermeasures needed)

Indoor unit

This Manual is used for both models, Cooling Only model and Heat Pump model. Positions shaded with screens in the description and tables are applied to the Heat Pump model only. Parts marked with XXX indicate the 60Hz, 380V model only.

CONTENTS

SECTION 3 SERVICE MANUAL ....................................3-1

SAFETY NOTES......................................................................................3-1

SELECTING A LOCATION FOR INSTALLATION ..................................3-2

3-1. PARTS SPECIFICATIONS ...........................................................3-3

3-2. OWNER’S MANU A L....................................................................3-7

3-3. REFRIGERANT PIPING SYSTEMATIC DRAWING ..................3-18

3-4. COMBINED REFRIGERANT PIPING

SYSTEMATIC DRAWING ..........................................................3-22

3-5. OUTLINE OF CONTROL ...........................................................3-26

3-6. TROUBLESHOOTING ...............................................................3-38

3-7. CONTROL CIRCUIT CONFIGURATION .................................3-107

3-8. EMERGENCY OPERATION ....................................................3-131

3-9. FORCED FUNCTION OF OIL LEVEL DETECTION

(OUTDOOR UNIT) ...................................................................3-135

3-10. REFRIGERANT RECOVERY METHOD WHEN

REPLACING THE COMPRESSOR..........................................3-136

3-11. REPLACEMENT OF COMPRESSOR .....................................3-140

3-12. REPLACING METHOD OF PARTS .........................................3-146

3-13. EXPLODED VIEWS AND PARTS LIST ...................................3-148

SECTION 3 SERVICE MANUAL

SAFETY NOTES

• Read these Safety Notes carefully before installing this unit.

• These Safety Notes contain very important safety information. Always be sure to observe these cautions.

• After installation is complete, try the operation of the unit to make sure that it is operating normally. Be certain to instruct the customer about how to operate the unit, and about necessary maintenance.

Give this Installation Manual to the customer along with the Owner’s Manual, and recommend that the customer keeps both for future reference.

WARNINGS

• The dealer or a special contractor must install this unit.

Attempts to install this unit by a customer could result in leaks, electric shock, or fire.

• Follow these instructions carefully when installing this unit.

Improper installation could result in leaks, electric shock, or fire.

• If this unit is installed in a small room, measures must be taken to ensure that, even in the

event of a refrigerant leak, the maximum safe limit for refrigerant concentration levels in the air is not exceeded.

Consult the dealer for details on what measures can be taken to keep from exceeding the maximum safe limit. If a refrigerant leak does cause refrigerant concentration levels in the air to exceed the maximum safe limit, asphyxiation could result.

• Select a location for installation that will be able to safely bear the weight of the unit.

If the installation location is not strong enough to support the unit and the unit falls, injury could result.

• Install the unit in the prescribed manner to withstand strong (hurricane-level) winds and

earthquakes.

Insufficiently secure installation could allow the unit to tip over, fall, or otherwise cause an accident.

• Ventilate the area if any refrigerant leaks during installation.

If the refrigerant comes into contact with an open flame, it will produce a toxic gas.

• After completing installation, make sure that no refrigerant is leaking.

If the refrigerant leaks indoors and comes into contact with an open flame in a water heater, stove, oven, or other such appliance, it will produce a toxic gas.

• Electrical work must be performed by a qualified electrician as described in the Installation

Manual. The unit must be connected to its own independent circuit.

Inadequate circuit capacity or improper installation could result in electric shock or fire.

• Wiring must be performed securely, using the prescribed cables. The cables must be

secured in a manner that prevents any force that pulls on the cables from being relayed to the terminal connectors.

If the cables are not connected or secured properly, fire or other accidents could result.

• The unit must be grounded.

Do not connect the ground wire to a gas pipe, water pipe, lightning rod, or telephone ground wire. When wiring the system to the main power supply, follow the standards established by the local power

company. Inadequate grounding can result in electric shock.

CAUTIONS

• Install a ground fault interrupter.

If a ground fault interrupter is not installed, electric shock could result.

• Do not install the unit in a location where combustible gases could conceivably leak.

Leaking gases that accumulate in the vicinity of the unit could be ignited by the unit.

3-1

SELECTING A LOCATION FOR INSTALLATION

WARNINGS

• Select a location for installation that will be able to safely bear the weight of the unit.

If the installation location is not strong enough to support the unit and the unit falls, injury could result.

CAUTION

• Do not install the unit in a location where combustible gases could conceivably leak.

Leaking gases that accumulate in the vicinity of the unit could be ignited by the unit.

Obtain permission from the customer to install the unit in a location that satisfies the following requirements:

• A location that permits level installation of the unit

• A location that provides enough space to service the unit safely

• A location where water draining from the unit will not pose a problem

Avoid the following types of locations:

• Locations where salt is present in large amounts (seaside areas), or where sulfuric gases are present in

large amounts (hot springs areas) (If the unit is to be used in such areas, special maintenance is necessary.)

• Locations that generate oils (including machine oils), steam, oily smoke, or corrosive gases

• Locations where organic solvents are used

• Locations in the vicinity of equipment that generates high frequency signals

• Locations where the outdoor unit will blow in the direction of a neighbor’s window

• Locations where the noise of the outdoor unit will pose a problem

• Locations with poor air circulation

3-2

3-1. PAR TS SPECIFICATIONS

Indoor unit

4-way Air Discharge Cassette Type

Model MMU- P0121H P0151H P0181H P0241H P0301H P0361H P0481H

Fan motor ICF-230-60-1 MF-200-90-2 Drain pump motor PJD-05230TF Float switch FS-0208-602 Control P.C. board transformer (Control P.C.B) SWT66 Remo-con/Power TT-02 Pulse motor EDM- MD12TF-3

Pulse motor valve EDMPressure sensor 150F/160NH6-D

Louver motor (panel) MT8-3-9

B252TF-1

(F25)

B402TF-1

(F40)

1-way Air Discharge Cassette Type

Model MMU- P0091SH P0121SH P0151SH P0181SH P0241SH

Fan motor AF-200-22-4N-1 AF-200-34-4D Running capacitor for fan motor 450V 1.0µF 400V 1.5µF 400V 2.5µF Drain pump PJV-0774 Float switch FS-085-003E FS-0208-601 Control P.C. board transformer TT-03 Pulse motor EDM- MD12TF-3 Pulse motor valve EDM- B252TF-1 (F25) B402TF-1 (F40) Pressure sensor 150F/160NH6-D Louver motor (Panel) MT-8-3-4

PJD-05230TF

B602TF-1

(F60)

Concealed Duct Type

Model MMD- P0071BH P0091BH P0121BH P0151BH P0181BH P0241BH P0301BH P0361BH P0481BH

Fan motor STF- 200-60-4D 200-60-4C 200-100-4E 200-100-4F 200-120-4D 200-140-4G Running capacitor

for fan motor Control P.C. board

(Transformer) Float switch FS-0208-601 Drain pump motor PJD-05230TF Pulse motor EDM- MD12TF-3 Pulse motor valve EDM-B252TF-1 (F25) EDM-B402TF-1 (F40) Pressure sensor 150F/160NH6-D Louver motor MT8-3-6

450V 2µF 500V 2.5µF 400V 5.0µF 400V 6µF 400V 10µF

TT-03

High Wall Type

Model MMK- P0091H P0121H P0151H P0181H P0241H

Fan motor MF-200-30-4A MF-200-30-4B Running capacitor for fan motor 400V 1.0µF 450V 1.5µF Control P.C. board

(Transformer) Pulse motor EDM- MD12TF-3 Pulse motor valve EDM- B252TF-1 (F25) B402TF-1 (F40) Pressure sensor 150F/160NH6-D Louver motor MT8-3-6

TT-03

3-3

Cooling only model

50Hz

Outdoor unit

Model name or rating

Part name

Compressor MG1450CW-21B YG890C-B1 YG1700CW-B1 YG1800CW-B1 Inner overload relay OFF : 115°C

Fan motor

High-pressure SW 20PS-G ON : 3.2MPa, OFF : 2.55MPa, (normal open contact)

High-pressure SW

Pressure sensor (For high pressure)

Pressure sensor (For low pressure)

Crank case heater —— AC240V, 40W AC240V, 74W Heater for accumulator AC 240V, 26W Electronic control valve

(For cooling bypass)

2-way valve

MMY-MP0801T8

(8HP inverter)

ACB-JBD8 OFF : 3.2Mpa, ON : 2.55Mpa,

(normal close contact )

MMY-MP1001T8

(10HP inverter)

STF-200–350A, AC220–240V, 350W

Protection relay OFF : 145°C, ON : 8 6°C

NEV-MOAJ510B0 (Coil), AC220–240V

MMY-MP06018

(6HP fixed-speed)

150NH4-H, 0–3.3MPa

150NH4-L, 0–0.98MPa

SEV18RC4 (Main unit) A12A15 (Coil), DC12V

NEV202DXF (Main unit)

NEV603DXF (Main unit)

MMY-MP08018

(8HP fixed-speed)

——

MMY-MP10018

(10HP fixed-speed)

Outdoor controller

Model name or rating

Part name

Power supply voltage 3 Phase, AC380 / 400 / 415V, 50Hz Power supply terminal block 60A, 3P (1pc.) and 30A, 3P (1pcs.) Communication line

terminal block Magnet switch

(Fixed compressor) Fuse (Power supply) AC 600V, 20A (3pcs. ) —— Fuse holder AC 600V, 30A (3pcs. ) —— Reactor CH-25 (2pcs.) —— Smoothing capacitor 2200µF, 400V (2pcs .) —— Fan capacitor 8µF, 450VAC (1pcs.) Power supply transformer TT-01 (1pcs.) P.C. board (Noise filter) MCC-1366 —— Line filter (AC) 600µH, 20A (2pcs.) —— P.C. board (Interface) MCC-1343 P.C. board (IPDU) Magnet switch (Power) AC440V, 13A (1pcs.) —— Power complex module 7MBR35SB120 (MCC-1342) —— P.C. board

(Lightning surge)

MMY-MP0801T8

(8HP inverter)

1A, 4P (1pcs. ) 1A, 2P (1pcs. )

MCC-1342

MMY-MP1001T8

(10HP inverter)

—— MCC-1357

MMY-MP06018

(6HP fixed-speed)

3 Phase, AC440V, 15A

MMY-MP08018

(8HP fixed-speed)

——

MMY-MP10018

(10HP fixed-speed)

3-4

Heat pump model

50Hz

Outdoor unit

Model name or rating

Part name

Compressor MG1450CW-21B YG8900-B1 YG1700CW-B1 YG1800CW-B1 Inner overload relay OFF : 115°C

Fan motor High-pressure SW ACB-JB128 ON : 3.2MPa, OFF : 2.55MPa, (normal open contact) High-pressure SW Pressure sensor

(For high pressure) Pressure sensor

(For low pressure) Crank case heater —— AC240V, 40W AC240V, 74W Heater for accumulator AC240V, 26W Electronic control valve

(For main throttle) Electronic control valve

(For cooling bypass)

4-way valve

2-way valve

MMY-MP0801HT8

(8HP inverter)

ACB-JA64 OFF : 3.2Mpa, ON : 2.55Mpa,

(normal close contact)

CHV-0712 (Main unit) CHV-040 1 (Main u n i t ) CHV-0712 (Main unit)

MMY-MP1001HT8

(10HP inverter)

STF-200–350A, AC220–240V, 350W

Protection relay OFF : 145°C, ON : 86°C

CHV-01AJ502E1 (Coil), AC220–240V

NEV-MOAJ510B0 (Coil), AC220–240V

MMY-MP0601H8

(6HP fixed-speed)

150NH4-H, 0–3.3MPa

150NH4-L, 0–0.98MPa

CEV30RC1 (M ain unit) L12A-03 (Coil), DC12V

SEV18RC4 (Main unit) A12A15 (Coil), DC12V

NEV202DXF (Main unit)

NEV603DXF (Main unit)

MMY-MP0801H8

(8HP fixed-speed)

——

MMY-MP1001H8

(10HP fixed-speed)

Outdoor controller

Model name or rating

Part name

Power supply voltage 3 Phase, AC380 / 400 / 415V, 50Hz Power supply terminal block 60A, 3P (1pc.) and 30A, 3P (1pc.) Communication line

terminal block Magnet switch

(Fixed compressor) Fuse (Power supply) AC 600V, 20A (3pcs.) —— Fuse holder AC 600V, 30A (3pcs.) —— Reactor CH-25 (2pcs.) —— Smoothing capacitor 2200µF, 400V (2pcs .) —— Fan capacitor 8µF, 450VAC (1pc.) Power supply transformer TT-01 (1pc.) P.C. board (Noise filter) MCC-1366 —— Line filter (AC) 600µH, 20A (2pcs.) —— P.C. board (Interface) MCC-1343 P.C. board (IPDU) Magnet switch (Power) AC440V, 13A (1pc.) —— Power complex module 7MBR35SB120 (MCC-1342) —— P.C. board

(Lightning surge)

MMY-MP0801HT8

(8HP inverter)

1A, 4P (1pc.) 1A, 2P (1pc.)

MCC-1342

MMY-MP1001HT8

(10HP inverter)

—— MCC-1357

MMY-MP0601H8

(6HP fixed-speed)

3 Phase, AC440V, 15A

MMY-MP0801H8

(8HP fixed-speed)

——

MMY-MP1001H8

(10HP fixed-speed)

3-5

Heat pump model

60Hz

Outdoor unit

Model name or rating

Part name

Compressor MG1450CW-22B YG8900-3B YG1700CW-3B YG1800CW-3B Inner overload relay OFF : 115°C

Fan motor High-pressure SW ACB-JB128 ON : 3.2MPa, OFF : 2.55MPa, (normal open contact ) High-pressure SW Pressure sensor

(For high pressure) Pressure sensor

(For low pressure) Crank case heater —— AC240V, 40W AC240V, 74W Heater for accumulator AC240V, 26W Electronic control valve

(For main throttle) Electronic control valve

(For cooling bypass)

4-way valve

2-way valve

MMY-MP0801HT7

(8HP inverter)

ACB-JA64 OFF : 3.2Mpa, ON : 2.55Mpa,

(normal close contact)

CHV-0712 (Main unit) CHV-040 1 (Main unit) CHV-0712 (Main unit)

MMY-MP1001HT7

(10HP inverter)

STF-200–350A, AC220V, 350W

Protection relay OFF : 145°C, ON : 8 6°C

CHV-01AJ502E1 (Coil), AC220–240V

NEV-MOAJ510B0 (Coil), AC220–240V

MMY-MP0601H7

(6HP fixed-speed)

150NH4-H, 0–3.3MPa

150NH4-L, 0–0.98MPa

CEV30RC1 (M ain unit) L12A-03 (Coil), DC12V

SEV18RC4 (Main unit) A12A15 (Coil), DC12V

NEV202DXF (Main unit)

NEV603DXF (Main unit)

MMY-MP0801H7

(8HP fixed-speed)

——

MMY-MP1001H7

(10HP fixed-speed)

Outdoor controller

Model name or rating

Part name

Power supply voltage 3 Phase, AC380V, 60Hz Power supply terminal block 60A, 3P (1pc.) and 30A, 3P (1pc.) Communication line

terminal block Magnet switch

(Fixed compressor) Fuse (Power supply) AC 600V, 20A (3pcs. ) —— Fuse holder AC 600V, 30A (3pcs. ) —— Reactor CH-25 (2pcs.) —— Smoothing capacitor 2200µF, 400V (2pcs .) —— Fan capacitor 10µF, 450VAC (1pc.) Power supply transformer TT-01 (1pc.) P.C. board (Noise filter) MCC-1366 —— Line filter (AC) 600µH, 20A (2pcs.) —— P.C. board (Interface) MCC-1343 P.C. board (IPDU) Magnet switch (Power) AC440V, 13A (1pc.) —— Power complex module 7MBR35SB120 (MCC-1342) —— P.C. board

(Lightning surge)

MMY-MP0801HT7

(8HP inverter)

1A, 4P (1pc.) 1A, 2P (1pc.)

MCC-1342

MMY-MP1001HT7

(10HP inverter)

—— MCC-1357

MMY-MP0601H7

(6HP fixed-speed)

3 Phase, AC440V, 15A

MMY-MP0801H7

(8HP fixed-speed)

——

MMY-MP1001H7

(10HP fixed-speed)

3-6

3-2. OWNER’S MANUAL

3-2-1. Name of Each Part

3-2-1-1. Outdoor unit

Air inlet

They are provided at front, rear, left, and right sides.

Fixing leg

3-2-1-2. Indoor unit

[4-way Air Discharge Cassette Type]

Earth screw

It is included in the electric parts box.

Air outlet (Discharge)

Hot air is discharged when cooling operation is performed.

Cold air is diacharged when heating operation is performed.

Power source hole Refrigerant pipe

connecting hole

Connecting valve is included inside here.

Air outlet/Discharge louver

Select air blow direction in cooling or heating operation each.

2-way discharge/3-way discharge

2-way discharge or 3-way discharge can be selected according to the shape or arrangement of the room. For details, consult with the dealer which you have purchased the air conditioner.

Clip

The clip is to open/close the air inlet grille.

[2-way Air Discharge Cassette Type]

Earth screw

It is included in the electric parts box.

Center panel Air inlet

Air in the room is sucked from here.

Air filter

Removes dust and trash. (Air filter is provided in the air grille.)

Air inlet grille

Air in the room is sucked from here.

Air outlet/Discharge louver

Select air blow direction in cooling or heating operation each.

Air filter

Removes dust and trash. (Air filter is provided in the center panel.)

3-7

[1-way Air Discharge Cassette Type]

[Concealed Duct type]

Earth screw

It is included in the electric parts box.

Air outlet/Discharge louver

Select air blow direction in cooling or heating operation each.

Air inlet grille

Air in the room is sucked from here.

Air filter

Removes dust and trash. (Air filter is provided in the air inlet grille.)

Air outlet flange

Discharge duct is connected.

Earth screw

It is included in the electric parts box.

Air filter

Removes dust and trash. (Air filter is provided in the air inlet grille.)

Air inlet

Air in the room is sucked from here.

[1-way Air Discharge Cassette Type]

Air outlet/Discharge louver

Select air blow direction in cooling or heating operation each.

Earth screw

It is included in the electric parts box.

Air inlet grille

Air in the room is sucked from here.

Air filter

Removes dust and trash. (Air filter is provided in the air inlet grille.)

[Concealed Duct High Static Pressure Type]

Air inlet

Suction duct is connected.

Air outlet

Discharge duct is connected.

Earth screw

Earth screws are provided in the electric parts box.

Drain pan

3-8

[Under Ceiling Type] [Floor Standing Cabinet Type]

Air outlet/Discharge louver

Select air blow direction in cooling or heating operation each.

Earth screw

It is included in the electric parts box.

Air inlet grille

Air in the room is sucked from here.

Air filter

Removes dust and trash. (Air filter is provided in the air inlet grille.)

Earth screw Air outlet/Discharge louver

Select air blow direction in cooling or heating operation each.

Air filter

Removes dust and trash. (Air filter is provided in the air inlet grille.)

Air inlet grille

Air in the room is sucked from here.

[High Wall Type] [Floor Standing Concealed Type]

Air outlet

Earth screw

Earth screws are provided in the electric parts box.

Drain receiver (With strainer)

It is an accessory part which is attached at site.

Air inlet grille

Air in the room is sucked from here.

Air inlet

Air filter

Removes dust and trash. (Air filter is provided in the air inlet grille.)

Air outlet grille/ Discharge louver

Select air blow direction in cooling or heating operation each.

Air filter

Removes dust and trash. (Air filter is provided in the front panel.)

Air in the room is sucked from here.

3-9

Front panel (Lower side) Earth screw

Earth screws are provided in the electric parts box.

MODE

FAN

TEMP.

AUTO FIX

CHECK ADDRESS

UNITUNIT

CENTRAL

F AN COOL

HEAHEAT

STSTANDBYANDBY FILTER PREHEAPREHEAT DEFROST LOUVER MANUAL

Display section

Operation section

Display section

Unit display

Set up temperature display

CHECK

Displayed during check mode.

Operation mode select display

The selected operation mode is displayed.

Air volume fix display

This is displayed only in the Ceiling concealed duct type.

Air volume select display

The selected air volume mode is displayed.

(LOW) (MED.)

(HIGH)

STANDBY display

It is displayed when the operation cannot be performed though it is not an error.

CENTRAL control display

Displayed when used with the central remote controller, etc.

LOUVER/MANUAL display

It is displayed when selecting Louver operation switch on a Model having no auto louver function.

LOUVER display

It is displayed while the discharge louver operates in AUTO mode.

FILTER display

If “FILTER” is displayed, clean the air filter.

PREHEAT/DEFROST display

Displayed when heating operation or defrost operation starts.

Unit No. in which error/fault is displayed in the set up temp. display section.

The selected set up temp. is displayed.

MODEMODE

FANAN

TEMPTEMP.

F ANAN COOLCOOL

HEAHEAT

AUTUTO FIX

CHECKCHECK

ADDRESSADDRESS

UNITUNIT

STANDBYANDBY FILFILTERTER PREHEAPREHEAT DEFRDEFROSTOST LOUVERLOUVER MANUMANUALAL

CENTRALCENTRAL

1212

MODEMODE

ON/OFFON/OFF

FILFILTERTER

CHECKCHECK

(In Ceiling concealed duct type air conditioner, air volume cannot be selected.)

3-2-2. Names and Operations of Remote Controller

3-2-2-1. Display section

In the display example, all are displayed for explanation. In real time, the selected contents are indicated. The displayed contents differ according to shape or type.

They are displayed on the Heat Pump model only.

3-10

3-2-2-2. Operation section

Push each switch to select a desired operation.

Filter reset switch

Resets (Erases) “FILTER” display.

Operation select switch

Selects desired operation mode.

Operation lamp

Lamp is lit during the operation. Lamp is off while stopped. Although it flashes when power switch is turned on or when turned on again after power failure, it goes on if the operation has started.

CHECK switch

When an error/fault occurs on the air conditioner, this switch is used to check the check code indicating fault status. Only use for fault diagnosis.

Air volume select switch

Selects the desired air volume mode.

Set up temp. switch

Adjusts the room temperature. Match to the desired set temperature

by pushing .

Operation section

ON/OFF button

When the button has been pushed, the operation starts, and it stops by pushing the button again. When the operation has stopped, the operation lamp and louver display disappear though other displays remain as they are.

Louver operation switch

In case of Model with auto louver, the discharge louver operates or stops during operation of air conditioner.

“Central indication”

When using a remote controller combined with a central remote controller, etc., contents which can be operated with the standard remote controller and “CENTRAL” display change by setting at the central remote controller.

Set up on central

remote controller

Last-push priority (No display)

Center Operation inhibit

For application control using “Weekly timer” or “Central remote controller” other than this standard remote controller, refer to the Manual attached to each remote controller.

“CENTRAL” display on

standard remote controller

Goes off

Goes on Flashes

3-11

Functions operated by

standard remote controller

Operated from both standard remote controller and central remote controller, and operated with contents specified later.

ON / OFF only can be operated. Operation not permissible.

LOW MED. HIGH

AUTO

MODE

CHECK

ADDRESS

UNIT

COOL HEA

ANDBY

PREHEA DEFR

OST LOUVER MANUALAL

3-2-3. Correct Usage

When you use the air conditioner at the first time or when you change the set up value, follow the procedure below. From the next time, the operation dis-played on the remote controller will start only by pushing ON/OFF button.

Preparation Turn on the power switch.

• The operation lamp (Red) flashes.

REQUIREMENT

• While using the air conditioner, operate it only with ON/OFF button without turning off the main power switch.

• When starting the operation after stop for a long time, turn on the main power switch for 12 hours or more

before start. (This is required because it is necessary to turn on the compressor case heater for heating in order to prevent overload on the compressor when activating the outdoor unit.)

Select an operation mode with the “MODE” button.

One push of the button, and the display changes as follows:

Select air volume with the “FAN” button.

One push of the button, and the display changes as follows:

(Air volume cannot be selected in the concealed duct type.)

• When air volume is “AUTO”, power of air differs according to the room temperature.

FAN COOL HEAT

Determine the set up temperature by pushing the “TEMP.”

Push “ON/OFF” button.

The operation lamp goes on, and the operation starts.

button.

MODE

F AN COOL

HEA

MODE

CHECK

AUTO

FIX

TEMP.

UNIT

ADDRESS

CENTRAL

FAN

STOP

FILTER

Push “ON/OFF” button.

The operation lamp goes off, and the operation stops.

“HEAT” is displayed on the Heat Pump model only.

CHECK

ON/OFF

NOTE

In cooling

• When the operation button has been pushed, the operation starts approx.1minute after.

In heating

• When the operation button has been pushed, the indoor fan performs pre-heating operation for 3 to 5 minutes as it stops and then blows out hot air.

• While the room temperature has attained the set temperature and the outdoor unit stops, the super-low air blows out and air volume becomes excessively small. During defrost operation, the fan stops so that cold air does not blow out, and “PRE-HEAT” and “DEFROST” are displayed.

When restarting the operation after stop

In heating operation, the fan operation may continue for approx. 30 seconds after the machine has stopped.

• When restarting the operation immediately after stop, the air conditioner does not operate for approx. 3 minutes to protect the machine.

STSTANDBY FILTER PREHEA

DEFR

OST LOUVER MANU

3-12

MODE

TEMP

COOL HEA

FIX

CHECK

ADDRESS

ANDBY

FIL

TER PREHEA DEFR

OST LOUVER MANUALAL

CENTRAL

MODE

ON/OFF

FIL

TER

CHECK

Center panel

3-2-4. Maintenance

For maintenance, be sure to turn off the power switch.

t Cleaning of air filter

[4-way Air Discharge Cassette Type]

The suction port opens by pushing the “clips” of the

MODE

F AN COOL

HEA

MODE

FIL

TER

FAN

CHECK

AUTUTO

FIX

CHECK

TEMP

UNIT

ADDRESS

CENTRAL

suction port laterally. Push up clip of the air filter, and take out the air filter by

ON/OFF

pulling it towards you.

[2-way Air Discharge Cassette Type]

• Pull the center panel toward you while lifting up it, and pull it slowly downward. (The center panel moves to either left or right only, so confirm before removing.)

• Remove the fall-preventing strings at both ends.

• Pull the air filter downward to remove it.

In case of MMU-P0361WH or MMU-P0481WH, pull the air filter downward undoing the clips.

CAUTION

Be sure to attach the fall-preventing strings of the center panel after cleaning.

If the center panel drops injury may occur.

STSTANDBY FIL

TER

PREHEA

DEFR

OST LOUVER MANU

FILTER display

Notifies the time to clean the air filter.

FILTER reset

Push the FILTER switch after cleaning.

“FILTER” display disappears.

[1-way Air Discharge Cassette Type]

• Undo clip of the suction port with both hands, open it slowly downward, push the air filter to inside to remove it from clips, and then remove the air filter.

(MMU-P0091SH and P0121SH model)

• Push clips at the center and left/right of the suction port to open the suction port.

• Lift up the air filter once, and pull it downward to remove it.

[Concealed Duct Type] [Concealed Duct High Static Pressure

Type]

• Cleaning method differs according to the installed air filter type.

Check with person who worked for installation or the dealer which you purchased it.

[Under Ceiling Type]

Pull the air filter towards you to take out it.

Push projection.

Air filter

[High Wall Type]

• Push the projection at the center of air filter. Clip is out.

• Undo the clip of air filter, pull the air filter downward while pushing it toward the main unit side.

Push the air filter, and pull it downward.

3-13

Front panel (Lower)

Air filter knob

[Floor Standing Cabinet Type]

• Pull down the upper part of suction port a little, pull it toward you and remove it, and then take out the air filter inside of the unit.

[Floor Standing Concealed Type]

• Pull down the air filter clip at the lower front panel, and take out the air filter by pulling it toward you.

NOTE

• For cleaning of air filter, use a cleaner or brush clean. If stain is heavy, it is

effective to wash the air filter in tepid water mixed with neutral detergent.

• After washing, rinse it well, and dry it in the shade.

• Install again the air filter which has been cleaned.

REQUIREMENT

• Insert the air filter until it stops securely.

n Cleaning of main unit/remote controller

• Wipe them with soft and dry cloth.

• If stain of the main unit is heavy, wipe out stain

with cloth wet in tepid water. (For remote control, wipe outstain with dry cloth without using water.)

• Do not use benzene, thinner , polishing powder, or chemical floor-cloth because they may cause deformation or crack on the panel or remote controller.

I will wipe soft and dry cloth!

Polishing

powder

Thinner

Benzene

Do not use.

Chemical floor-cloth

• Perform fan operation for half a day to dry inside of air conditioner well.

• Turn off the power switch.

• Clean the air filter, and attach it again as it was before.

Use after drying

when it has not been

used for a long time!

(Concealed duct high static pressure type, Floor standing concealed type)

Cleaning of drain pan and drain receiver (with strainer)

CAUTION

Clean drain pan or drain receiver (strainer).

If garbage is clogged in drain pan or drain receiver, water may flood resulted in damp on the ceiling or floor.

“Drain receiver (strainer) is provided to Floor standing concealed type only.”

REQUIREMENT

For cleaning of drain pan and drain receiver, contact the dealer which you have purchased the air conditioner.

3-14

Don’t forget

periodical

check!

Close windows

and doors often!

Don’t cool

excessively!

3-2-5. How to Use the Air Conditioner Effectively

For saving of electric cost and comfortable cooling or heating operation.

n Diligent cleaning of air filter

• If the air filter is clogged, cooling/ heating effect decreases.

n Close windows and doors often

• Close windows and doors so that cool air does not blow through the room.

WARNING

Do not expose your body directly in cool air for a long time.

• It may affect the health. Especially, be watchful for person physically

handicapped, children, or senior person.

n Room temperature without unevenness

• Adjust the air direction with discharge louver. If you expose yourself in the air flow for a long

time, it may affect your health.

For using the air conditioner effectively, operate it under the following conditions.

Outdoor temperature –5°C or more, 43°C or less Indoor temperature 21°C or more, 32°C or less

Cooling operation

Heating operation

Indoor humidity 80% or less If the air conditioner operates with humidity exceeding 80%, dew adhered to surface of

the panel may fall, or dew may be sprayed from the discharge grille. Outdoor temperature –15°C or more, 21°C or less Indoor temperature 28°C or less

If the air conditioner is operated under conditions other than these conditions, a protective device works and the operation may become unavailable.

3-15

3-2-6. When the Following Symptoms are Found

Check the points described below before asking repair servicing.

Symptom

Outdoor unit • White misty cold air

or water is out.

• Sometimes, noise “Pushu !” is heard.

Indoor unit •“Swish” sound is

heard sometimes.

• Slight “Pishi!” sound is heard.

• Discharge air smells.

• The operation lamp

flashes

•“STANDBY” indication is lit.

It is not a failure.

• Sound or cool air is output from the stand by indoor unit.

• When power of the air conditioner is turned on, “Ticktock” sound is heard.

Cause

• Fan of the outdoor unit stops automatically and performs defrost operation.

• Solenoid valve works when defrost operation starts or finishes.

• When the operation has started, during the operation, or immedi-

ately after the operation has stopped, a sound such as water flows may be heard, and the operation sound may become larger for 2 or 3 minutes immediately after the operation has started. They are flowing sound of refrigerant or draining sound of dehumidifier.

• This is sound generated when heat exchanger, etc. expand and contract slightly due to change of temperature.

• Various smell such as one of wall, carpet, clothes, cigarette, or cosmetics adhere to the air conditioner.

• Flashes when power is turned on again after power failure, or when power switch is turned on.

• When cooling operation cannot be performed because another indoor unit performs heating operation.

• When the manager of the air conditioner has fixed the operation to COOL or HEAT, and an operation contrary to the setup operation is performed.

• When fan operation stopped to prevent discharge of hot air.

• Since refrigerant is flowed temporarily to prevent stay of oil or

refrigerant in the stand by indoor unit, sound of flowing refrigerant, “Kyururu” or “Shaa” may be heard or white steam when other indoor unit operates in HEAT mode, and cold air in COOL mode may be blow-out.

• Sound is generated when the expansion valve operates when power has been turned on.

Operates or stops automatically. Does not operate.

Silent

Air is not cooled or warmed sufficiently.

Check again.

It’s strange.

• Is the timer “ON” or “OFF”?

• Is it a power failure?

• Is the power switch turned off?

• Is the power fuse or breaker blown?

• Has the protective device operated? (The operation lamp goes on.)

• Is the timer “ON”? (The operation lamp goes on.)

• Are COOL and HEAT selected simultaneously?

(“STANDBY” indication is lit on the display column of the remote controller.)

• Is the suction port or discharge port of the outdoor unit obstructed?

• Are any door or window open?

• Is the air filter clogged with dust?

• Is discharge louver of the indoor unit set at appropriate position?

• Is air selection set to “LOW” “MED”, and is the operation mode set to “FAN”?

• Is the setup temp. the appropriate temperature?

• Are COOL and HEAT selected simultaneously?

(“STANDBY” indication is lit on the display column of the remote controller.)

When the following symptoms are found, stop the operation immediately, turn off the power switch, and contact the dealer which you have purchased the air conditioner.

• Activation of switch is unstable.

• Fuse or breaker is blown periodically.

• Foreign matters or water entered by mistake.

• When if activation cause of the protective device has been removed, the operation is not performed.

• Other unusual status occurred.

3-16

3-2-7. Confirmation and Check

n Confirmation of check No.

When an error/fault occur on the air conditioner, the check No. indicating the defective status can be confirmed by the CHECK switch on the remote controller.

Before requesting repair, confirm the check No. in the following procedure, and contact the dealer with symptom of the air conditioner.

[Confirmation procedure]

1. Hold the CHECK switch on the remote controller for 1 or 2 seconds. The “CHECK” display appears, and the unit No. and check No. are displayed in the display section of set up TEMP.

2. The unit No. represents the number of indoor unit in which an error occurred.

3. Check No. is displayed as follows.

• When an error/fault does not occur.

• When one error/fault occurs.

• When two error/fault occur.

CHECK

CHECK 1

CHECK 2

If you could not read the display sufficiently, push CHECK switch again.

n Check servicing

• Though differed according to use status, when the air conditioner has been used for several seasons, inside of

the air conditioner may be stained, and performance may decrease. Separated from daily maintenance, a check servicing (charged) is recommended.

• The Ceiling cassette type air conditioner incorporates a drain pump. If it is used in an oily and dusty place, the

pump can be blocked causing the water drain to disable. It is required to clean the pump periodically. For cleaning of drain pump, contact the dealer. (When a drain-up kit is attached to concealed duct type and

under ceiling type are same precautions are recommended.)

3-2-8. Accessories Sold Separately

WARNING

When you require accessory or parts, consult us. Be sure to use the products sold separately which are specified by us.

If using other products than those specified, a fire, electric shock or water leakage may be caused. For installation, ask a special engineer.

3-17

3-3.

REFRIGERANT PIPING SYSTEMATIC DRA WING

Inverter unit (10HP, 8HP)

Cooling Only model : MMY-MP0801T8, MP1001T8 Heat Pump model : MMY-MP0801HT8, MP1001HT8

: MMY-MP0801HT7, MP1001HT7

Propeller fan

Fan motor

(Right side)

Strainer

Pulse motor

valve A

(PMV 1 + PMV 2)

Sensor (TE1)

Air heat exchanger at outdoor side

(Left side)

Air heat exchanger at outdoor side

They are not provided to

the Cooling Only model.

4-Way valve

Check valve

Strainer

Liquid

tank

Sensor

Pulse motor valve B

(Cooling bypass)

(PMV 3)

Sensor

(TK1)

Solenoid valve

(SV3C)

Capillary

Sensor

(TK2)

Dryer

Strainer

Oil tank

Solenoid valve (SV3A)

Check valve

Strainer

Sensor

(TD1)

Check

valve

Check valve

High-pressure SW

Sensor

(TK3)

Compressor case oil removal valve

Oil

separator

Check valve

Compressor

Inverter

Solenoid valve

Check joint

Strainer

Solenoid valve

Fixed-speed

Check valve

(SV2)

High-pressure sensor

Capillary

(SV42)

High-pressure

Sensor (TD2)

Low-pressure

sensor

Capillary

Check valve

Check joint

Strainer

(TS)

Accumulator

Capillary

Solenoid valve (SV3B)

Packed v alv e

(balancing pipe)

Packed v alv e

(liquid side)

Service valve

(gas side)

3-18

Fixed-speed unit (10HP, 8HP)

Cooling Only model : MMY-MP08018, MP10018 Heat Pump model : MMY-MP0801H8, MP1001H8

: MMY-MP0801H7, MP1001H7

Propeller fan

Fan motor

(Right side)

They are not provided to

the Cooling Only model.

Check valve

Strainer

Liquid

tank

Pulse motor

valve A

(PMV 1 + PMV 2)

Sensor

(TK1)

Strainer

Pulse motor valve B

(Cooling bypass)

Solenoid valve

Capillary

(PMV 3)

(SV3C)

Sensor

(TK2)

Sensor (TE1)

Strainer

Sensor

(TD1)

Check

valve

Air heat exchanger at outdoor side

(Left side)

Air heat exchanger at outdoor side

Solenoid valve

(SV2)

High-pressure sensor

Check joint

Oil

separator

Check

valve

High-pressure SW

Compressor

Strainer

Solenoid

valve

(SV41)

High-pressure

Sensor (TD2)

Capillary

Solenoid

valve

(SV42)

4-Way valve

Check joint

Sensor

(TS)

Accumulator

Dryer

Packed v alv e

(balancing pipe)

Packed v alv e

(liquid side)

Strainer

Service valve

(gas side)

Oil tank

Check valve

Solenoid valve (SV3A)

Check valve

Check

valve

Sensor

(TK3)

Compressor case oil removal valve

3-19

Fixed-speed

Check valve

Low-pressure

sensor

Capillary

Check valve

Solenoid valve (SV3B)

Strainer

Capillary

Fixed-speed unit (6HP)

Cooling Only model : MMY-MP06018 Heat Pump model : MMY-MP0601H8

: MMY-MP0601H7

Propeller fan

Fan motor

(Right side)

They are not provided to

the Cooling Only model.

Check valve

Liquid

tank

Strainer

Pulse motor

valve A (PMV1)

Pulse motor valve (Cooling bypass)

Sensor

(TK1)

Capillary

(PMVB)

Solenoid valve

(SV3C)

Sensor

(TK2)

Sensor (TE1)

Strainer

Air heat exchanger at outdoor side

(Left side)

Air heat exchanger at outdoor side

Solenoid valve

(SV2)

High-pressure sensor

Check joint

Oil

separator

Check valve

Compressor

Strainer

Solenoid valve

(SV41)

High-pressure Sensor (TD1)

Capillary

4-Way valve

Check joint

Sensor

(TS)

Accumulator

Dryer

Packed v alv e

(balancing pipe)

Packed v alv e

(liquid side)

Strainer

Service valve

(gas side)

Oil tank

Check valve

Solenoid valve (SV3A)

Check valve

Check

valve

Sensor

(TK3)

Compressor case oil removal valve

3-20

Fixed-speed

Check valve

Low-pressure

sensor

Capillary

Check valve

Solenoid valve (SV3B)

Strainer

Capillary

)

(

Explanation of functional parts

Functional part Functional outline

Solenoid valve

Check valve

Pulse motor valve

Oil separator 1)Early protection of oil level down (Decreases flow-out of discharge oil to cycle) Temp.

sensor

Pressure sensor

Balancing pipe 1)Oil supply path for balancing oil of each outdoor unit.

1. SV3A

2. SV3B 1) Returns oil supplied in the balancing pipe to the compressor.

3. SV3C

4. SV2

5. SV4 (n) (Activation compensating valve for fixed-speed compressor)

Check valve for discharge

Check valve for liquid line

1. PMV A (Two pcs. used) (PMV1 + PMV 2)

2. PMVB (PMV3)

1. TD1 TD2

2. TS1 (Connector: White)

3. TK1 TK2 TK3

4. TE1 (Connector : Blue)

1. High pressure sensor

2. Low pressure sensor

1)Gathers oil in the compressor case to the oil tank of compressor during OFF time.

2)Supplies the gathered oil to the balancing pipe during ON time when pressure is applied to inside of the oil tank.

Supplies oil in the case directly to the balancing pipe when pressure is app lie d to inside of the compressor case.

4)Reduces pressure after pressure has been applied to inside of the oil tank

1)Applies pressure to inside of the oil tank during ON time.

2)Detects oil level with temp. system.

(Hot gas bypass)

1)Low-pressure release valve

To protect lowering of low pressure which is difficult

to activating time of Modular multi type)

2)Protects liquid refrigerant gathering in accumulator.

3)Gas balancing in STOP time.

1)For activation of gas balance

2)Deflates gas in discharge pipe. (Protects liquid stagnation in discharge pipe.)

1)Protects counter pressure when the inverter compressor is operating and the constant speed compressor stops.

2)Decreases activation load when fixed-speed compressor is activated. (Shared function with SV4 (n) valve)

Prevents liquid accumulation in heat exchanger of the stopped outdoor unit.

(Connector CN300, 301 : White) * It is provided to the Heat Pump model only.

1)Control function for super heat volume in heating operation (Refrigerant split flow between outdoor units)

2)Liquid line shut-down function while the fixed-speed units stop

3)Liquid line counter-pressure preventive control function during defrost operation

4)Fixed with FULL OPEN in cooling operation.

(Cooling bypass) (Connector CN302 Red)

1)Liquid bypass proportional control function for releasing discharge temperature (Adjustment of refrigerant drying degree during inner reducing operation)

2)Releases low pressure.

(TD1 : Connector: Red, TD2 : Connector: White)

1)Used to protect discharge temperature of the compressor.

2)Used to control cooling bypass for releasing discharge temperature.

1)Used to control super heat of PMV in heating operation.

2)Used to control cooling bypass for releasing discharge temperature.

(TK1 : Connector: Black, TK2 : Connector: Blue, TK3 : Connector: Green)

1)Used to detect oil level judgment. (TH1, TK2)

2)Used to detect dilution status of oil. (TK3)

1)Used to control the cooling fan.

2)Used to control defrost operation in heating operation.

3)Used to control the heating fan.

(Connector : Red)

1)Used to detect high pressure, and compressor capacity.

2)In cooling operation, it is used to detect high pressure, and control the fan in cooling low ambient conditions.

(Connector : Blue)

1) In cooli ng operat ion, it is used to detect low pressure, and control the capacity of the compressor.

2)In heating operation, it is used to detect low pressure and control super heat.

2)Low-pressure bypass function between outdoor units, which recovers the liquid refrigerant stagnated in the stand by outdoor unit.

3)Low-pressure balancing pipe function to secure pressure difference when check valve of every outdoor units aligned on a circuit in parallel are inverted.

It is provided to the Cooling Only model only.

(Compressor case bypass)

1)Stirs oil to prevent oil separation into two layers.

3-21

3-4. COMBINED REFRIGERANT PIPING SYSTEMATIC DRAWING

3-4-1. Normal Operation

3-22

They are not provided to the Cooling Only model.

(Indoor unit 1)

TC1

Check

joint

Pressure

sensor

(Indoor unit 2)

TC1

Check

joint

Pressure

sensor

Air heat

exchanger

at indoor side

TA (Suction sensor)

exchanger

at indoor side

Air heat

TA (Suction sensor)

TC2

Strainer

TC2

Check

valve

Strainer

(Indoor unit 3)

TC1

Check

joint

Pressure

sensor

Air heat

exchanger

at indoor side

TA (Suction sensor)

TC2

Strainer

Dryer

Liquid

tank

Strainer

Pulse motor valve A

(PMV 1 + PMV 2)

Sensor

(TK1)

Strainer

Center unit (Inverter) Terminal unit (Fixed-speed)

Propeller fan

Fan motor

Sensor (TE1)

Pulse motor valve B

(Cooling bypass)

(PMV 3)

Strainer

Solenoid valve

(SV3C)

Capillary

Sensor

Capillary

(TD1)

Sensor

(TK2)

Check

valve

Oil tank

Check valve

Solenoid valve (SV3A)

Check valve

(Right side)

Air heat exchanger at outdoor side

(Left side)

Air heat exchanger at outdoor side

Solenoid valve

(SV2)

High-pressure

sensor Check joint Strainer

Oil

separator

High-pressure SW

Sensor

(TK3)

Compressor case oil removal valve

Check valve

Compressor

Inverter

Solenoid valve

Low-pressure

Fixed-speed

Check

Capillary

valve

(SV42)

High-pressure

Sensor

(TD2)

sensor

Capillary

4-Way valve

Check valve

Check joint

Sensor

(TS)

Accumulator

Capillary

Solenoid valve (SV3B)

Pulse motor valve A (PMV 1 + PMV 2)

Check

valve

Strainer

Liquid

tank

Dryer

Strainer

Sensor (TE1)

Capillary

Pulse motor valve B

(Cooling bypass)

(PMV 3)

Sensor

(TK1)

Solenoid valve

(SV3C)

Capillary

Sensor

(TK2)

Oil tank

Check valve

Solenoid valve (SV3A)

Check valve

Air heat exchanger at outdoor side

Strainer

Check

valve

Sensor

(TD1)

High-pressure SW

Check

Sensor

valve

(TK3)

Compressor case oil removal valve

Propeller fan

(Right side)

(Left side)

Oil

separator

Check

valve

Compressor

Fixed-speed

Fan motor

Solenoid valve

Check joint Strainer

Solenoid

valve

(SV41)

Fixed-speed

Check valve

(SV2)

High-pressure sensor

Capillary

Solenoid

valve

(SV42)

High-pressure

Sensor (TD2)

Low-pressure

sensor

Capillary

4-Way valve

Check valve

Check joint

Sensor

(TS)

Accumulator

Capillary

Solenoid valve (SV3B)

StrainerStrainer

Packed valve (balancing pipe)

valve (liquid side)

valve (gas side)

Service

Packed

(Solid line) High-pressure gas or compressed liquid refrigerant (Dotted line) Evaporating gas refrigerant (Low-pressure gas)

Packed valve (balancing pipe)

Packed valve (liquid side)

Service valve (gas side)

Unit 2 (Fixed-speed)

Packed

valve

(balancing

(liquid

pipe)

side)

Service valve (gas side)

Unit 3 (Fixed-speed)

Packed

valve

(balancing

(liquid

pipe)

side)

Service valve (gas side)

Server

Unit 4 (Fixed-speed)

Packed

valve

(balancing

(liquid

pipe)

side)

Service valve (gas side)

3-4-2. Emergent Operation When IPDU Unit is Failed

3-23

They are not provided to the Cooling Only model.

(Indoor unit 1)

TC1

Check

joint

Pressure

sensor

TC1

Check

Pressure

joint

sensor

Air heat

exchanger

at indoor side

TA (Suction sensor)

(Indoor unit 2)

at indoor side

Air heat

exchanger

TA (Suction sensor)

TC2

Strainer

TC2

Check

valve

Strainer

Liquid

(Indoor unit 3)

TC1

Check

joint

Pressure

sensor

Air heat

exchanger

at indoor side

TA (Suction sensor)

TC2

Strainer

Dryer

tank

Strainer

Pulse motor valve A

(PMV 1 + PMV 2)

Sensor

(TK1)

Strainer

Center unit (Inverter) Terminal unit (Fixed-speed)

Propeller fan

Temporal set up master unit in emergencyFailure

Fan motor

Sensor (TE1)

Pulse motor valve B

(Cooling bypass)

(PMV 3)

Strainer

Solenoid valve

(SV3C)

Capillary

Sensor

Capillary

(TD1)

Sensor

(TK2)

Check

valve

Oil tank

Check valve

Solenoid valve (SV3A)

Check valve

(Right side)

Air heat exchanger at outdoor side

(Left side)

Air heat exchanger at outdoor side

Solenoid valve

(SV2)

High-pressure

sensor

Check joint Strainer

Oil

separator

Solenoid valve

(SV42)

Check valve

High-pressure SW

Sensor

(TK3)

Compressor case oil removal valve

Compressor

Inverter

Fixed-speed

Check valve

High-pressure

Sensor

(TD2)

Low-pressure

sensor

Capillary

4-Way valve

Check valve

Check joint

Sensor

(TS)

Accumulator

Capillary

Solenoid valve (SV3B)

Strainer

Pulse motor valve A (PMV 1 + PMV 2)

Check

valve

Strainer

Liquid

tank

Dryer

Strainer

Sensor (TE1)

Capillary

Pulse motor valve B

(Cooling bypass)

(PMV 3)

Sensor

(TK1)

Solenoid valve

(SV3C)

Capillary

Sensor

(TK2)

Oil tank

Check valve

Solenoid valve (SV3A)

Check valve

Air heat exchanger at outdoor side

Strainer

Check

valve

Sensor

(TD1)

High-pressure SW

Check

Sensor

valve

(TK3)

Compressor case oil removal valve

Propeller fan

(Right side)

(Left side)

Oil

separator

Check

valve

Compressor

Fixed-speed

Fan motor

Solenoid valve

Check joint Strainer

Solenoid

valve

(SV41)

Fixed-speed

Check valve

(SV2)

High-pressure sensor

Capillary

Solenoid

valve

(SV42)

High-pressure

Sensor (TD2)

Low-pressure

sensor

Capillary

4-Way valve

Check valve

Check joint

Sensor

(TS)

Accumulator

Capillary

Solenoid valve (SV3B)

Strainer

(Master unit backup operation)

Packed valve (balancing pipe)

valve (liquid side)

valve (gas side)

Service valves fully closed at liquid gas side.

Service

Packed

(Solid line) High-pressure gas or compressed liquid refrigerant (Dotted line) Evaporating gas refrigerant (Low-pressure gas)

Packed valve (balancing pipe)

Packed valve (liquid side)

Service valve (gas side)

Unit 2 (Fixed-speed)

Packed

valve

(balancing

(liquid

pipe)

side)

Service valve (gas side)

Unit 3 (Fixed-speed)

Packed

valve

(balancing

(liquid

pipe)

side)

Service valve (gas side)

Server

Unit 4 (Fixed-speed)

Packed

valve

(balancing

(liquid

pipe)

side)

Service valve (gas side)

3-4-3. Emergent Operation When Fixed-Speed Unit is Failed

3-24

They are not provided to the Cooling Only model.

(Indoor unit 1)

TC1

Check

joint

Pressure

sensor

(Indoor unit 2)

TC1

Check

joint

Pressure

sensor

Air heat

exchanger

at indoor side

TA (Suction sensor)

exchanger

at indoor side

Air heat

TA (Suction sensor)

TC2

Strainer

TC2

Check

valve

Strainer

Liquid

(Indoor unit 3)

TC1

Check

joint

Pressure

sensor

Air heat

exchanger

at indoor side

TA (Suction sensor)

TC2

Strainer

Dryer

tank

Strainer

Pulse motor valve A

(PMV 1 + PMV 2)

Pulse motor valve B

(Cooling bypass)

Sensor

(TK1)

Solenoid valve

Capillary

Sensor

Oil tank

Solenoid valve (SV3A)

Check valve

Center unit (Inverter) Terminal unit (Fixed-speed)

Propeller fan

Failure

(Right side)

(Left side)

Oil

separator

Check

High-pressure SW

Compressor

(TK3)

Compressor case oil removal valve

valve

Fixed-speed

Air heat exchanger at outdoor side Sensor (TE1)

Air heat exchanger at outdoor side

(PMV 3)

Strainer

(SV3C)

Sensor

(TD1)

Check

valve

Check valve

High-pressure SW

Sensor

(TK3)

Compressor case oil removal valve

(TK2)

(Right side)

(Left side)

Oil

separator

Check valve

Compressor

Inverter

Fan motor

Solenoid valve

Check joint Strainer

Solenoid valve

Fixed-speed

Check valve

(SV2)

High-pressure sensor

Capillary

(SV42)

High-pressure

Sensor (TD2)

Low-pressure

sensor

Capillary

4-Way valve

Check valve

Check joint

Sensor

(TS)

Accumulator

Capillary

Solenoid valve (SV3B)

Strainer

Pulse motor valve A (PMV 1 + PMV 2)

Check

valve

Strainer

Liquid

tank

Dryer

Strainer

Sensor (TE1)

Capillary

Pulse motor valve B

(Cooling bypass)

(PMV 3)

Sensor

(TK1)

Solenoid valve

(SV3C)

Capillary

Sensor

(TK2)

Check

Oil tank

Check valve

Solenoid valve (SV3A)

Check valve

Air heat exchanger at outdoor side

Strainer

Check

valve

Sensor

(TD1)

Sensor

valve

Fan motor

Solenoid valve

Check joint Strainer

Solenoid

valve

(SV41)

Fixed-speed

Check valve

(SV2)

High-pressure sensor

Capillary

Solenoid

valve

(SV42)

High-pressure

Sensor (TD2)

Low-pressure

sensor

Capillary

4-Way valve

Check valve

Check joint

Sensor

(TS)

Accumulator

Capillary

Solenoid valve (SV3B)

Strainer

Packed valve (balancing pipe)

valve (liquid side)

valve (gas side)

Service valve opned fully at balancing pipe.

Service

Packed

(Solid line) High-pressure gas or compressed liquid refrigerant (Dotted line) Evaporating gas refrigerant (Low-pressure gas)

Packed valve (balancing pipe)

Packed valve (liquid side)

Service valve (gas side)

Unit 2 (Fixed-speed)

Packed

valve

(balancing

(liquid

pipe)

side)

Service valves closed fully at liquid and gas side.

Service valve (gas side)

Unit 3 (Fixed-speed)

Packed

valve

(balancing

(liquid

pipe)

side)

Service valve (gas side)

Server

Unit 4 (Fixed-speed)

Packed

valve

(balancing

(liquid

pipe)

side)

Service valve (gas side)

3-4-4. Recovery of Refrigerant in Failed Outdoor Unit

3-25

They are not provided to the Cooling Only model.

(Indoor unit 1)

TC1

Check

joint

Pressure

sensor

TC1

Check

Pressure

joint

sensor

Air heat

exchanger

at indoor side

TA (Suction sensor)

(Indoor unit 2)

at indoor side

Air heat

exchanger

TA (Suction sensor)

TC2

Strainer

TC2

Check

valve

Strainer

Liquid

(Indoor unit 3)

TC1

Check

joint

Pressure

sensor

Air heat

exchanger

at indoor side

TA (Suction sensor)

TC2

Strainer

Dryer

tank

Strainer

Pulse motor valve A

(PMV 1 + PMV 2)

Pulse motor valve B

Sensor

(TK1)

Strainer

Center unit (Inverter) Terminal unit (Fixed-speed)

Propeller fan

Failure

Fan motor

(Right side)

Air heat exchanger at outdoor side

Strainer

Check

valve

High-pressure SW

Sensor

(TK3)

Compressor case oil removal valve

Sensor (TE1)

(Cooling bypass)

(PMV 3)

Solenoid valve

(SV3C)

Capillary

Sensor

(TK2)

Check

valve

Oil tank

Check valve

Solenoid valve (SV3A)

Check valve

(Right side)

Air heat exchanger at outdoor side

(Left side)

Air heat exchanger at outdoor side

Strainer

Sensor

(TD1)

separator

High-pressure SW

Sensor

(TK3)

Compressor case oil removal valve

Oil

Check valve

Compressor

Inverter

Check valve

Solenoid valve

(SV2)

High-pressure

sensor Check joint Strainer

Solenoid valve

(SV42)

High-pressure

Sensor

(TD2)

Low-pressure

sensor

Fixed-speed

Capillary

4-Way valve

Check valve

Check joint

Sensor

(TS)

Accumulator

Capillary

Solenoid valve (SV3B)

Strainer

Pulse motor valve A (PMV 1 + PMV 2)

Check

valve

Strainer

Liquid

tank

Dryer

Strainer

Sensor (TE1)

Capillary

Pulse motor valve B

(Cooling bypass)

(PMV 3)

Sensor

(TK1)

Solenoid valve

(SV3C)

Capillary

Sensor

(TK2)

Check

valve

Oil tank

Check valve

Solenoid valve (SV3A) OFF ® ON

Check valve

OFF ON

Sensor

(TD1)

(Left side)

Oil

separator

Check

valve

Compressor

Fan motor

Check joint Strainer

Solenoid

Fixed-speed

Check valve

Solenoid valve

(SV2)

High-pressure sensor

Capillary

valve

(SV41)

High-pressure Sensor (TD2)

Low-pressure

sensor

Capillary

Solenoid

valve

(SV42)

Check valve

4-Way valve

Check joint

Sensor

(TS)

Accumulator

Capillary

Solenoid valve (SV3B)

OFF ON

Strainer

(Normal outdoor unit recovers refrigerant)

Packed valve (balancing pipe)

valve (liquid side)

valve (gas side)

Service

Packed

(Solid line) High-pressure gas or compressed liquid refrigerant (Dotted line) Evaporating gas refrigerant (Low-pressure gas)

Service valve fully opned at balancing pipe.

Service valve fully closed at liquid side.

Packed valve (balancing pipe)

valve (liquid side)

valve (gas side)

Unit 2 (Fixed-speed)

Packed

valve

(balancing

(liquid

pipe)

side)

Service valve (gas side)

Service

Packed

Fully close the valves of balancing pipe.

Fully close the valves 10 minutes after the operation has started

Unit 3 (Fixed-speed)

Packed

valve

(balancing

(liquid

pipe)

side)

Service valve (gas side)

Server

Unit 4 (Fixed-speed)

Packed

valve

(balancing

(liquid

pipe)

side)

Service valve (gas side)

3-5. OUTLINE OF CONTROL

3-5-1. Outdoor Unit

3-5-1-1. Operation start/Operation end

The compressor, solenoid valve, pulse motor valve (PMV A), outdoor fan, etc. are controlled by a command from the indoor controller. The server outdoor unit starts/stops by a command from the master outdoor unit.

Operation signal from indoor Inverter drive Outdoor fan output Fixed-speed MG-SW output Each solenoid valve output

4-way valve output (OFF in cooling operation)

PMV A output

Operation start

OFF

OFF Full

ON or OFF

(By command indoor)

ON or OFF

Specified opening

Operation stop

2 minutes and 30 seconds

Full close

3-5-1-2. Thermostat ON/Thermostat OFF

Thermostat ON Thermostat OFF

Operation signal from indoor Inverter drive Outdoor fan output Fixed-speed MG-SW output Each solenoid valve output

4-way valve output (OFF in cooling operation)

PMV A output

OFF

Full close

ON or OFF

(By command indoor)

ON or OFF

Specified opening

2 minutes and 30 seconds

Full close

3-26

3-5-1-3. Outline of main controls

Item

1. Pulse motor valve (PMV A, B) control

Operation explanation and applied data, etc.

(1) PMV A (PMV 1, PMV 2) control (using two PMV)

1) PMV (Pulse Motor Valve) is controlled between 100 to 1000 pulses during operation.

2) In cooling operation, PMV 1, PMV 2 are fixed with FULL OPEN status. (PMV 1 = 500 pulses, PMV 2 = 500 pulses)

3) In heating operation, PMV opening is controlled by detection temperature of TS and TD sensors and detection value of PS pressure. (Super Heat control)

4) Close fully PMV opening when thermostat is OFF, operation stops, and the A.C. stops in trouble.

1000

550 500

100

PMV opening

PMV 2

PMV 1

Min. Med. Max.

(2) PMV B (PMV 3) control

The purpose of PMV B control is to control the liquid refrigerant bypass for suppressing discharge temp. increase or compressor internal temp. increase.

1) Opening is controlled with pulses from 0 to 500.

2) PMV opening is controlled with temp. detected by TS/TD sensors.

3) PMV openings are fully closed during thermostat-OFF, operation stop, and emergency stop.

Remarks

2. Outdoor fan control

(1) Cooling fan control

1) Outdoor fan speed (No. of fan driving waves) is controlled by Pd pressure detection value.

2) In a specified time when cooling operation is activated, the master outdoor unit controls the outdoor fan speed (No. of fan driving waves) by Pd pressure detection value. The server outdoor unit controls the outdoor fan speed (No. of fan driving waves) with temperature detected by TE sensor.

Pd pressure

Cooling fan control controls No. of fan driving waves so that

the detection value of Pd pressure becomes 1.45 to 1.8MPa.

(MPa)

2.2

2.1

2.0

1.9

1.8

1.7

1.6

1.5

1.4

1.3

1.2

1.1

Max. :

[ ]

16 waves

[-1 wave/20 sec] In down time : From 15 waves to 1 wave

Interval control

[+1 wave/20 sec] From 2 waves to Max.No.of waves

[Hold]

From 1 wave to

Max. No. of waves

In up time : From 0 wave to 1 wave

[0 wave] : 180 sec

[ ]

[1 wave] : 30 sec

[+1 wave/20 sec] (Up to 5 waves)

No. of waves can be controlled between 0 wave (STOP) to 16 waves (All waves).

3-27

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