Hitachi FSN3E, FSNY3E, FSVN3E, FSVNY3E Installation And Operation Manual

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Page 1

SET FREE MINI SERIES FS(V)N(Y)3E

INSTALLATION AND OPERATION MANUAL

Page 2

English

Specications in this manual are subject to change without notice in order that HITACHI may bring the latest innovations to their customers. Whilst every effort is made to ensure that all specications are correct, printing errors are beyond HITACHI’s control; HITACHI cannot be held responsible for these errors.

CAUTION

This product shall not be mixed with general house waste at the end of its life and it shall be retired according to the appropriated local or national regulations in a environmentally correct way. Due to the refrigerant, oil and other components contained in Air Conditioner, its dismantling must be done by a professional installer according to the applicable regulations. Contact to the corresponding authorities for more information.

English

From 4th July 2007 and following Regulation EC Nº 842/2006 on Certain Fluorinated Greenhouse gases, it is mandatory to ll in the

label attached to the unit with the total amount of refrigerant charged on the installation.

Do not vent R410A/R407C into the atmosphere: R410A & R407C are uorinated greenhouse gases covered by the Kyoto protocol

global warming potential (GWP) R410A/R407C: = 1975/1652.5.

English

Instructions to ll in the "F-Gas Label":

1.- Fill in the Label with indelible ink the refrigerant amounts:



- Factory Charge,  - Additional Charge &  - Total Charge.

2.- Stick the Protection Plastic Film on the F-Gas Label (delivered in a plastic bag with the Manual). To see Figure nº 2.

Figure 1. F-Gas Label with Protection Plastic Film Figure 2. Protection Plastic Film

Protection Plastic Film

Adhesive Surface

Peel-off Paper

DANGER – Hazards or unsafe practices which COULD result in severe personal injuries or death.

CAUTION – Hazards or unsafe practices which COULD result in minor personal injury or product or property damage.

PRECAUCIÓN – Riesgos o prácticas poco seguras que PODRÍAN provocar lesiones personales de menor importancia o daños en el

producto u otros bienes.

NOTE – The text following this symbol contains information or instructions that may be of use or that require a more thorough explanation.

MODELS CODIFICATION

Important note: Please, check, according to the model name, which is your air condi-

tioner type, how it is abbreviated and referred to in this instruction manual. This Installation and Operation Manual is only related to the RAS units FS(V)N(Y)3E combined with the HITACHI indoor units System Free.

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OUTDOOR UNIT

1~ 3N~

FSVN3E FSNY3E

Heat Pump Models

RAS-4FSVN3E RAS-4FSNY3E

RAS-5FSVN3E RAS-5FSNY3E

RAS-6FSVN3E RAS-6FSNY3E

INDOOR UNIT

FSN(2/3/4)(M)(E)(i)

RCI RCIM RCD RPC

4-way cassette type 2-way cassette type C Ceiling type

RCIM-0.8FSN3 RCI-1.0FSN3(E)(i)(k) RCIM-1.0FSN3 RCD-1.0FSN2 RCI-1.5FSN3(E)(i)(k) RCIM-1.5FSN3 RCD-1.5FSN2 RPC-1.5FSN3 RCI-2.0FSN3(E)(i)(k) RCIM-2.0FSN3 RCD-2.0FSN2 RPC-2.0FSN3 RCI-2.5FSN3(E)(i)(k) RCD-2.5FSN2 RPC-2.5FSN3 RCI-3.0FSN3(E)(i)(k) RCD-3.0FSN2 RPC-3.0FSN3(E) RCI-4.0FSN3(E)(i)(k) RCD-4.0FSN2 RPC-4.0FSN3(E) RCI-5.0FSN3(E)(i)(k) RCD-5.0FSN2 RPC-5.0FSN3(E) RCI-6.0FSN3(E)(i)(k) RPC-6.0FSN3(E)

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INDOOR UNIT

FSN(2/3/4)(M)(E)(i)

RPIM

RPI RPK RPF RPFI

In the ceiling

Wall type

Floor type

Floor concealed type

RPIM-0.8FSN4E(-DU) RPI-0.8FSN4E RPK-0.8FSN(H)3M RPIM-1.0FSN4E(-DU) RPI-1.0FSN4E RPK-1.0FSN(H)3M RPF-1.0FSN2E RPFI-1.0FSN2E RPIM-1.5FSN4E(-DU) RPI-1.5FSN4E RPK-1.5FSN(H)3M RPF-1.5FSN2E RPFI-1.5FSN2E

RPI-2.0FSN4E RPK-2.0FSN3M RPF-2.0FSN2E RPFI-2.0FSN2E RPI-2.5FSN4E RPK-2.5FSN3M RPF-2.5FSN2E RPFI-2.5FSN2E RPI-3.0FSN4E RPK-3.0FSN3M RPI-4.0FSN4E RPK-4.0FSN3M RPI-5.0FSN4E RPI-6.0FSN4E

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INDEX

1 SAFETY SUMMARY 2 IMPORTANT NOTICE 3 SYSTEM DESCRIPTION 4 BEFORE OPERATION 5 REMOTE CONTROLLER OPERATION 6 AUTOMATIC CONTROLS 7 BASIC TROUBLESHOOTING 8 NAME OF PARTS 9 REFRIGERANT CYCLE 10 UNITS INSTALLATION 11 REFRIGERANT PIPING & REFRIGERANT CHARGE 12 DRAIN PIPING 13 ELECTRICAL WIRING 14 INSTALLATION OF REMOTE CONTROLLER 15 TEST RUNNING 16 SAFETY SUMMARY & CONTROL DEVICE SETTING 17 TROUBLESHOOTING

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Meaning of model codification

RAS - X FS (V) N (Y) 3 E

Unit Type (Outdoor Unit)

Compressor power (HP) 4/5/6

Set Free System (2 pipes)

Single phase (1~ 230V50Hz)

R410A Refrigerant

Threephase (3N~ 400V 50Hz)

Series

Made In Europe

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ENGLISH

PART I- OPERATION

1 SAFETY SUMMARY

1.1 ADDITIONAL INFORMATION ABOUT SAFETY

! DANGER

• Do not pour water into the indoor or outdoor unit. These products are equipped with electrical parts. If water contacts with electrical components then it will cause a serious electrical shock.

• Do not touch or adjust safety devices inside the indoor or outdoor units. If these devices are touched or adjusted, it may cause a serious accident.

• Do not open the service cover or access the indoor or outdoor units without disconnecting the main power supply.

• In case of re Turn OFF the main switch, put out the re at once and contact your service contractor.

! CAUTION

• Do not use any sprays such as insecticide, lacquer, hair spray or other

ammable gases within approximately one (1) meter from the system.

• If circuit breaker or fuse is often activated, stop the system and contact your service contractor.

• Do not make service or inspections tasks by yourself. This works must be performed by qualied service person.

• Do not put any strange material (sticks, etc...) into the air inlet and outlet. These units have high speed rotating fans and it is dangerous that any object touches them.

• Refrigerant leakage can cause difculty with breathing due to insufcient air.

• This appliance must be used only by adult and capable people, having received the technical information or instructions to handle properly and safely this appliance.

• Children should be supervised to ensure that they do not play with the appliance.

? NOTE

It is recommended to ventilate the room every 3 or 4 hours.

2 IMPORTANT NOTICE

• Verify, in accordance with the manuals which appear in the outdoor and indoor units, that all the information required for the correct installation of the system is included. If this is not the case, contact your distributor.

• HITACHI pursues a policy of continuing improvement in design and performance of products. The right is therefore

reserved to vary specications without notice.

• HITACHI cannot anticipate every possible circumstance that might involve a potential hazard.

• This air conditioner has been designed for standard air conditioning for human beings only. Do not use this for other purposes such as for drying clothes, refrigerating foods or for any other cooling o heating process.

• No part of this manual may be reproduced without written permission.

• If you have any questions, contact your service contractor of HITACHI.

• This manual gives a common description and information for this air conditioner which you operate as well as for other models.

• Check and make sure that the explanations of each part of this manual correspond to your air conditioner model.

• Refer to the models codication to conrm the main characteristics of your system.

• Signal words (DANGER and CAUTION) are used to identify

levels of hazard seriousness. Denitions for identifying

hazard levels are provided in previous pages with their respective signal words.

• It is assumed that this unit will be operated and serviced by English speaking people. If this is not the case, the customer should add safety, caution and operating signs in the native language of the personal.

• This air conditioner has been designed for the following temperature. Operate the air conditioner within this range:

Temperature

Maximum Minimum

Cooling

Mode

Indoor 32°C DB/23°C WB 21°C DB/15°C WB

Outdoor 46 ºC DB -5 °C DB

Heating

Mode

Indoor 27 °C DB 15 °C DB

Outdoor 15 °C WB -20 °C WB (*)

DB: Dry Bulb Temperature

WB: Wet Bulb Temperature

? NOTE

(*): (-15 – -20)°C WB, operation control range.

• These operations modes are controlled by the remote control switch.

• This manual should be considered as a permanent part of the air conditioner. This manual gives a common description and information for this air conditioner which you operate as well as for other models.

SAFETY SUMMARY

PMML0354A rev.1 - 03/2015

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! DANGER

Pressure Vessel and Safety Device: This air conditioner is equipped with a high pressure vessel under PED (Pressure Equipment Directive). The pressure vessel has been designed and tested before shipment according to PED. Also, in order to prevent the system from an abnormal pressure, a high pressure switch, which needs no eld adjustment, is utilized in the refrigeration system. Therefore, this air conditioner is protected from abnormal pressures. However, if abnormally high pressure is applied to the refrigeration cycle including the high pressure vessel(s), it will result in serious injury or death due to explosion of the pressure vessel. Do not apply a pressure higher than the following pressure to the system, by modifying or changing the high pressure switch.

! CAUTION

This unit is designed for commercial and light industrial application. If installed in house hold appliance, it could cause electromagnetic interference.

Start-up and Operation: Check to ensure that all the stop valves are fully opened and no obstacle exists at the inlet/outlet sides before start-up and during the operation.

Maintenance: Periodically check the high pressure side pressure. If the pressure is higher than the maximum allowable pressure, stop the system and clean the heat exchanger or remove the cause.

Maximum Allowable Pressure and High Pressure Cut-out Value:

Product series Outdoor unit model Refrigerant

Maximun allowable

pressure (MPa)

High pressure switch cut-out

value (MPa)

FS(V)N(Y)3E Series RAS-(4-6) HP R410A 4.15 4.00 ~ 4.10

? NOTE

The label for the vessel under PED are attached on the high pressure vessel. The pressure vessel capacity and vessel category are indicated on the vessel.

Location of high pressure switch

Compressor Oil separator

? NOTE

The high pressure switch is indicated on the electrical wiring diagram in the outdoor unit as PSH connected to printed circuit board (PCB1) in the

outdoor unit

Structure of High Pressure Switch

Contact Point Pressure Detected

Connected to the electrical wire

! DANGER

• Do not change the high-pressure switch locally or change the high pressure cut-out set value locally. If changed, it will cause serious injury or death due to explosion.

• Do not attempt to turn service valve rod beyond its stop.

3 SYSTEM DESCRIPTION

Hitachi presents the inverter-driven home central air-conditioning SET FREE mini series product, which is characterized by energy-

saving, high efciency, comfort, environmental protection, stability and reliability. In order to meet the requirement of increasing

the control intelligence of equipment and of comfort, the intelligent control, energy-saving operation and comfortableness are

more important. Especially the business building, building ofce, villa, apartment and residential area etc, need an intelligent and

confortable environment through all year. The better air conditioning solution can be provided for these buildings by inverter- driven and scroll compressor that the structure can been improved.

SYSTEM DESCRIPTION

PMML0354A rev.1 - 03/2015

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ENGLISH

4 BEFORE OPERATION

! CAUTION

• Supply electrical power to the system for approximately 12 hours before start-up or a long shutdown. Do not start the system immediately after power supply, it may cause a compressor failure because the compressor is not heated well.

• When the system is started after a shutdown longer that approximately 3 months, it is recommended to check the system by your service contractor.

• Turn OFF the main switch when the system is to be stopped for a long period of time: If the main switch is not turned OFF, electricity will be used, because the oil heater is always energised during compressor stopping.

• Make sure that the outdoor unit is not covered with snow or ice. If covered, remove it by using hot water (approximately 50°C). If the water temperature is higher that 50 °C, it will cause damage to plastic parts.

5 REMOTE CONTROLLER OPERATION

It is advisable to use PC-ART or PC-ARF remote controller (both optional). For more information about it installation and operation,

please refer to its corresponding Installation and Operation Manuals.

6 AUTOMATIC CONTROLS

The system is equipped with the following functions.



Three minute guard

The compressor remains off for at least 3 minutes once it has stopped. If the system is started within approximately 3 minutes after it has stopped, the RUN indicator is activated. However, the cooling operation or the heating operation remains off and does not start until after 3 minutes has elapsed.

Operation may stop for 6 minutes maximum to protect compressor.



Frost prevention during cooling operation

When the system is operated in a low temperature room, the cooling operation may be changed to fan operation for a while to avoid frost formation on the indoor heat exchanger.



Automatic restart after power failure

If the power supply is interrupted for short periods of time (up to 2 seconds) the Remote Control switch will retain the settings and the unit will restart when the power is restored. If Automatic Restart is required after periods of lost power supply in excess of 2 seconds please contact your distributor (optional function).



Slow air control during heating operation

When the compressor is stopped while the thermostat is OFF, or the system is performing the automatic defrosting operation, the fan speed is set at the slow position.



Automatic defrosting cycle

When the heating operation is stopped by pressing RUN/STOP switch, frosting on the outdoor unit is checked and the defrosting operation may be performed for the maximum of 10 minutes.



Prevention of overload operation

When the outdoor temperature is too high during heating operation, heating operation is stopped due to activation of the outdoor thermistor until the temperature becomes low.



Hot start during heating operation

To prevent cold air discharge, the fan speed is controlled from the slow position to the set position according to the discharge

air temperature. At this time the louver is xed horizontally.



Compressor hot start

FS(V)N(Y)3E Series does not operate within 4 hours after power supply (stoppage code d1-22).

In case of operating within 4 hours, see Test Run chapter.

BEFORE OPERATION

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7 BASIC TROUBLESHOOTING

! CAUTION

• When water leakage from the indoor unit occurs, stop the operation

and contact your contractor

• When you smell or white smoke occurs from the unit, stop the system

and contact your contractor.



This is not abnormal

• Sound from deforming Part

During system starting or stopping, and abrading sound might be heard. However, this is due to thermal deformation of plastic parts. It is not abnormal.

• Refrigerant Flow Sound

While the system is being started or stopping, sound from the

refrigerant ow may be heard.

• Smells from Indoor Unit

Smell adheres on indoor unit after a long period of time. Clean

the air lter and panels or make a good ventilation.

• Steam from Outdoor Heat Exchanger

During defrosting operation, ice on the outdoor heat exchanger is melted, resulting in making steam.

• Dew on Air Panel

When the cooling operation continues for a long period of time under high humidity conditions (higher than 27°C DB/80% R.H.), dew can form on the air panel.

• Dew on Cabinet

When the cooling operation continues for a long period of timer (higher than 27°C DB/80% R.H.), dew can form on the cabinet.

• Sound for the indoor unit heat exchanger

During the cooling operation, a sound may be heard from the indoor unit heat exchanger due to water freezing or melting.

• Click sound on Outdoor Unit

When the system main switch is on, click sound may be heard. This sound comes from electrical expansion valve reset function.

• Chatter sound on Outdoor unit.

During system starting, stopping or defrosting operation,chatter sound might be heard. This is due to pressure equalising process of piping.



No operation

Check whether the SET TEMPERATURE is set at the correct temperature.



Not cooling well or heating well

- Check for obstruction of air ow of the outside or inside

units.

- Check if too much heat source exists in the room.

- Check if the air lter is clogged with dust.

- Check to see if the doors or windows are opened or not.

- Check if the temperature condition is not within the

operating range.



Abnormal swing louver’s position

Check if the four louver’s position at the air outlet are in same position.



If trouble still remains...

If the trouble still remains even after checking the above items, contact your service contractor and inform the following data:

- Unit Model Name

- Content of Trouble

- Alarm Code no. on Liquid Crystal Display

? NOTE

Except for a long period of shutdown, keep the main switch ON, since the oil heater is energised when the compressor is stopped.

BASIC TROUBLESHOOTING

PMML0354A rev.1 - 03/2015

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ENGLISH

PART II-INSTALLATION

8 NAME OF PARTS

Nº Description Remarks

1 Air intake 2 Air outlet 3 Service cover 4 Electrical switch box 5 Holes for refrigerant piping and electrical wiring piping 6 Drain holes 3-Ø24 7 Drain holes 2-Ø26 8 Holes for xing machine to wall 4-(M5) 9 Refrigerant liquid pipe Flare nut: Ø9.52 (3/8”)

10 Refrigerant gas pipe Flare nut: Ø15.88 (5/8”)

NAME OF PARTS

PMML0354A rev.1 - 03/2015

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9 REFRIGERANT CYCLE

EXAMPLE:

(Ø15.88)

(Ø9.52)

RCI-2.5FSN4E

RCI-5FSVN3E

RCI-2.5FSN4E

Ø9.52

R410A 4.15 MPa

Refrigerant ow

for cooling

Refrigerant ow

for heating

Installation

refrigeration pipe

Connection by

are nut

Connection by

ange

Connection by

welding

Gas refrigerant

Leakage test

pressure

No. Part name No. Part name No. Part name

1 Compressor 11 Capillary Tube 21 Branch Pipe (liquid)

2 Outdoor unit Heat exchanger 12 Micro Computer Control Expansion Valve 22 Branch Pipe (gas)

3 Accumulator 13 Check valve 23 Indoor Unit Heat Exchanger

4 Oil Separator 14 Solenoid valve 24 Strainer

5 Strainer 15 Check Joint 25 Expansion Valve

6 Strainer 16 Stop Valve for Liquid Line 26 Distributor

7 Strainer 17 Stop Valve for Gas Line 27 Gas discharge thermistor

8 Distributor 18 High Pressure Switch for Protection 28 Condenser pipe thermistor

9 Reversing Valve 19 High Pressure Sensor 29 Ambient thermistor

10 Capillary Tube 20 Low Pressure Sensor -

REFRIGERANT CYCLE

PMML0354A rev.1 - 03/2015

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ENGLISH

10 UNITS INSTALLATION

10.1 GENERAL NOTES

! CAUTION

• Transport the products as close to the installation location as practical before unpacking.

• Do not put any material on the products.

• Apply four lifting wires on to the outdoor, when lifting it by crane.

• Install the outdoor unit with sufcient clearance around it for operation

and maintenance as shown in the next gures.

• Install the outdoor unit where good ventilation is available.

• Do not install the outdoor unit where is a high level of oil mist, salty air

or sulphurous atmosphere.

• Install the outdoor unit as far as practical (being at least 3 meters) from electromagnetic wave radiator (such as medical equipment).

• For cleaning, use noninammable and nontoxic cleaning liquid. Use of inammable agent may cause explosion or re.

• Work with sufcient ventilation, for working in an enclosed space may cause oxygen deciency. Toxic gas may be produced when cleaning agent is heated to high temperature by, e.g., being exposed to re.

• Cleaning liquid shall be collected after cleaning.

• Pay attention not to clamp cables when attaching the service cover to

avoid electric shock or re.

• Keep clearance between the units of more than 50mm, and avoid obstacles that may hamper air intake, when installing more than one units together.

• Install the outdoor unit in the shade or not exposed to direct sunshine or direct radiation from high temperature heat source.

• Do not install the Outdoor Unit in a space where a seasonal wind directly blows to the Outdoor fan.

• Check to ensure that the foundation is at, level and sufciently strong.

• Install the unit in a restricted area not accessible by the general public.

• Aluminum ns have very sharp edges. Pay attention to the ns to

avoid injury.

10.2 INSTALLATION SPACE

(Unit: mm)

a) In case that upper side is open.

(Single unit)

b) In case that upper side and either of the sides

are open (front side obstacles exist). (Single unit)

c) Upper side is open. (Multiple unit)

100 mm or more of the side space is acceptable on the service cover side

Allow 100mm of space between units. Leave open both right and left sides.

Be sure to use the fan direction guide. Leave open both right and left sides

The length A is as shown in the following table:

L A

0<L≤1/2H 600 or greater 1/2H<L≤H 1200 or greater

Do not stack more than two units in height.

? NOTE

For detailed information and more installation options, please refer to the Service Manual.

UNITS INSTALLATION

PMML0354A rev.1 - 03/2015

Page 14

10.3 INSTALLATION PLACE PROVISION



Concrete Foundation

1 When installing the outdoor unit, x the unit by anchor bolts.

Air ow direction

Base of

outdoor unit

Nut

Special washer

(Accessory)

Anchor bolt

M10

Filled mortar

Max. 21 mm

Fix the outdoor unit to the anchor bolts by special washer.

Please, refer to the following gure regarding the location of xing holes:

Anchor bolt M10 (Ø12.5 hole)

? NOTE

*: Space for downward piping.

Example of xing outdoor unit by anchor bolts.

Cut this portion when this

type of anchor bolt is used.

If not, it is difcult to remove

the service cover.

Concrete Anchor bolt

Max. 21mm

(After cut "A)

2 Fix the outdoor unit rmly so that declining, making noise,

and falling down by strong wind or earthquake is avoided.

1161109

Fixing plate (eld-supplied)

Both sides on the unit

xing can be possible.

When the vibration measures

are necessary, add vibration

proof rubber. (Field-supplied)

3 During the heating or defrosting operations, drain water is

discharged from the unit.

When installing the unit, the location with good drainage should

be selected, or establish the drainage.

It is recommended not to install the unit at high place such as on a roof or a veranda, because the water may drip from the unit.

If the unit installation at high place is not avoidable, the drain water should be treated surely by installing additional drain pan. (Especially in winter, the drain water may be frozen and cause of injury by slipping.)

4 In case of the drain piping is necessary for the outdoor unit,

use the drain-kit (DBS-26 : Optional Part).

348

23922469

14093.5

Drain hole (4-Ø24)

Drain hole (Ø26)

Drain boss (optional part)

Attaching position

Front side (Air discharge side)

5 The whole base of the outdoor unit should be installed on a

foundation or frame. When using vibration-proof material, it should also be positioned in the same place.

When installing the outdoor unit on a eld supplied frame, use

metal plates to adjust the frame width for stable installation as

shown in the gure below.

INCORRECT

Outdoor unit is

unstable

Frame

60mm

Frame width (Field supplied)

Outdoor unit base width

CORRECT

Outdoor unit is

stable

Outdoor unit base width

Frame

Metal plate

100 mm or more

Metal plate

Recommended metal plate size (Field supplied)

• Material: Hot-rolled mild steel plate (SPHC)

• Plate thickness: 4.5 T

410

(550)

2- Long hole

UNITS INSTALLATION

PMML0354A rev.1 - 03/2015

Page 15

ENGLISH



Suspended unit.

1 Suspend the unit as the drawing

indicates.

2 Ensure that wall can resist the

Outdoor unit weight indicated in

specication label plate.

3 It is recommended to select

each foot support to bear the full weight of the unit (in order to consider stress fatigue applied when unit is working too).

Wall bracket (*)

Anchor Bolts (*)

(*) Field supplied

! CAUTION

Pay attention to the following for installation:

• Installation shall ensure that outdoor unit

will not incline, vibrate, make noise or fall down by a blast of wind or in an earthquake. Calculate quake-resistance strength to ensure that installation is strong enough against falling. Fix the unit with wires (eld supplied) when installing in a location without walls or windbreak and likely exposed to a blast of wind.

• To use a vibration-proof mat, x four places to the front and back.

3.3.0.1 Installing location where the unit will be exposed to strong wind.

Follow the instructions below to install on the rooftop or a location without surrounding buildings, where strong wind is expected against the product.

1 Choose a location where the

outlet or inlet side of the product will not be exposed to strong wind.

2 When the outlet is exposed to

strong wind: Direct strong wind may cause

lack of air ow and adversely

affect to the operation.

! CAUTION

Excessive strong wind against the outdoor unit outlet may cause inverse rotation and damage the fan and motor.

11 REFRIGERANT PIPING & REFRIGERANT CHARGE

11.1 PIPING MATERIALS

1 Prepare locally-supplied copper pipes. 2 Select the piping size with the correct thickness and correct

material which can have sufcient pressure strength.

3 Select clean copper pipes. Make sure there is no dust and

moisture inside. Blow the inside of the pipes with oxygen free nitrogen to remove any dust and foreign materials before connecting pipes.

? NOTE

• A system with no moisture or oil contamination will give maximum performance and lifecycle compared to that of a poorly prepared system. Take particular care to ensure all copper piping is clean and dry internally.

• There is no refrigerant in the cycle of the indoor unit.

! CAUTION

• Cap the end of the pipe when pipe is to be inserted through a hole.

• Do not put pipes on the ground directly without a cap or vinyl tape at

the end of the pipe.

• If piping installation is not completed until next day or over a longer period of time, braze off the ends of the piping and charge with oxygen free nitrogen through a Schrader valve type access tting to prevent moisture and particle contamination.

• Do not use insulation material that contains NH3 because it can damage cooper pipe material and can be a source of future leakage.

• Completely insulate both refrigerant gas piping and liquid piping between the indoor unit(s) and the outdoor unit.

• If not insulated, dew will ocur on the piping surface

REFRIGERANT PIPING & REFRIGERANT CHARGE

PMML0354A rev.1 - 03/2015

Page 16

11.2 SUSPENSION OF REFRIGERANT PIPING

Suspend the refrigerant piping at certain points and prevent the refrigerant piping from touching the weak part of the building such as wall, ceiling, etc…

(If touched, abnormal sound may occur due to the vibration of the piping. Pay special attention in case of short piping length).

1~15m

Indoor unit

Fire-proof section

treatment

Do not x the refrigerant piping directly with the metal ttings

(The refrigerant piping may expand and contract).

Some examples for suspension method are shown below.

For Suspending

Heavies

For piping

along the wall

For instant installation work

11.3 PIPING CONNECTION FOR OUTDOOR UNIT

1 To open/close the service cover:

• Remove the screws following the instructions to the above

gure.

• Slowly press down the cover.

? NOTE

Hold the cover with a hand to remove screws as the cover may fall down.

Service cover

Hook (three places): two fans

2 Conrm that the valve is closed. 3 Prepare a eld-supplied bend pipe for liquid line. Connect

it to the liquid valve by are nut through the square hole of

bottom base.

4 For Gas Piping Connection.

Prepare a eld-supplied bend pipe for gas line. Braze it and the factory-supplied pipe ange at the outside of the unit.

5 The pipes can be connected from 4 directions. Make holes

in the piping cover or cabinet for taking out pipes. Take the piping cover away from the unit, and make holes by cutting along the guideline at the rear of the cover or punching with a driver. Remove the burr with a cutter, and place a

insulation (eld supplied) to protect cables and pipes.

Nº Description



Rear side piping work



Pipe Cover



Right side piping work



Bottom side piping work (Knock out hole)



Front side piping work



Piping work



Stop Valve



Removing Direction for Service Cover



For the front and side piping

Front piping hole

Side piping hole

To use racking or conduit tubes, check the size and remove

part following the slit.

? NOTE

Place insulation (eld supplied) to protect cables and pipes from being damaged by plate edges.

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ENGLISH



For the downward piping

Gas piping

Knock-out hole

Bottom base

Cables

Liquid piping

? NOTE

Cables shall not contact directly to the pipes.



For the rear side piping

Rear Cover

? NOTE

Remove the rear pipe cover under the rear cover and remove part following the slit.

6 Mount the piping cover in order to avoid water entering into

the unit. Seal the holes where pipes and wires are inserted, by using a insulator and rubber bushes as shown below.

Piping cover

Rubber bush (Accessory) Add cross cutting to the center of the rubber bushing. Attach rubber bushing to the hole of wiring. In case that conduit tube is used, rubber bush is not necessary.

Gas pipe

Power source and operating wiring

Liquid pipe

Insulation (Accessory).

Attach insulation to the pipe as shown in the gure and space shall not

exist at the piping hole.

Cut the insulation as shown in the gure when attaching work is difcult.

7 If the eld-supplied piping is connected with stop valves

directly, it is recommended use a tube bender.

8 Check to ensure that the stop valves are closed completely

before connecting pipes.

9 Connect the eld supplied refrigerant pipes to the indoor unit

and outdoor unit. Apply the oil thinly at the seat are nut and

pipe before tightening.

The required tightening torque is as follows:

Pipe Size Tightening Torque (Nm)

Ø 6.35 mm 20

Ø 9.52 mm 40

Ø 12.70 mm 60

Ø 15.88 mm 80

10 After connecting the refrigerant piping, seal the open space

between knockout hole and refrigerant pipes by using insulation material.

Unit side

Nº Description



Insulation Material



Insulation Material



Field Supplied



Insulation Material

11 Operation of stop valve should be performed according to

the gure below.

Close before shipment

Nº Description Remarks



Cap



Allen wrench Fig.A: Hex 4 mm / Fig.B: Hex. 8 mm



Refrigerant Piping Field Supplied



Flare nut



Refrigerant pressure To Outdoor Unit



Seat Surface Fully closed position



Check Joint

Only the charging those can be connected



Cap



O-Ring Rubber



Spindle valve

Open – Counterclockwise Close – Clockwise

Tightening Torque (Nm)

Valve type Model A B C D

Fig.A Liquid valve (4~6)HP 7-9 37 40 16 Fig.B Gas valve (4~6)HP 9-11 30 60 9

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

Outdoor unit stop valve

Do not apply two spanners at this position. If applied, leakage will occur.

Stop valve

Flare nut

! CAUTION

• At the test run, fully open the spindle.

• If not fully opened, the devices will be damaged.

• Do not attempt to turn service valve rod beyond its stop.

• Do not loosen the stop ring. If the stop ring is loosened, it is danger-

ous since the spindle will hop out.

• An excess or a shortage of refrigerant is the main cause of trouble to the units. Charge the correct refrigerant quantity according to the description of label at the inside of service cover.

• Check for refrigerant leakage in detail. If a large refrigerant leakage occurs, it will cause difculty with breathing or harmful gases would occur if a re was being used in the room.



Evacuation and refrigerant charge

- Connect the gauge manifold using charging hoses with a

vacuum pump or a nitrogen cylinder to the check joints of the liquid line and the gas line stop valve.

- Check for any gas leakage at the are nut connection, by

using nitrogen gas to increase the pressure at 4.15 MPa

for outdoor units inside of the eld-supplied piping.

- Operate the vacuum pump for 1 to 2 hours until the

pressure decreases lower than a pressure of 756 mmHg in vacuum.

- For charging refrigerant, connect the gauge manifold

using charging hoses with a refrigerant charging cylinder to the check joint of the liquid line stop valve.

- Charge the proper quantity of refrigerant according to

the piping length (Calculate the quantity of the refrigerant charge).

- Fully open the gas line stop valve, and slightly open the

liquid line stop valve.

- Charge refrigerant by opening the gauge manifold valve.

- Charge the required refrigerant within the difference

range of ±0.5kg by operating the system in cooling.

- Fully open the liquid line stop valve after completing

refrigerant charge.

- Continue cooling operation for more than 10 minutes to

circulate the refrigerant.

Example of Evacuation and Refrigerant Charge.

Never use the refrigerant charged in the outdoor unit for air purging.

Insufcient refrigerant will lead to failure

Gauge manifold

Vacuum pump

Nitrogen cylinder for air tight test and nitrogen blow during brazing

Gas line stop valve

Liquid line stop valve

Gas line

Liquid line. Cover the liquid line with thermal insulation

Cover the are nut and unit

of the piping connection with thermal insulation.

Thermal insulation nishing

Wind tape from outside of thermal

insulating of gas piping and liquid

piping

Indoor unit

Insulate the liquid pipe for prevention of the capacity decrease

according to the ambient air conditions and the dewing on the pipe

surface by the low pressure.

Check to ensure that there is no gas leakage. When large amount of

the refrigerant leaks, the troubles as follows may occurs.

1. Oxygen Deciency

2. Generation of Harmful Gas due to chemical reaction with re.

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ENGLISH

11.4 REFRIGERANT PIPING LENGTH

The refrigerant piping between the indoor unit and the outdoor unit should be designed using the following chart.

Keep the design point within the area of the chart, which is showing the applicable height difference according to piping length.

When outdoor unit

is installed higher

than indoor unit

When outdoor unit

is installed lower

than indoor unit

Setting before

shipment

Equivalent piping

length (m)



Piping system

Case a) Header branch Case b) Line branch

? NOTE

• The liquid piping and the gas piping must be of the same length and run along the same route.

• Multikits for multiple connections (optional accessory as system parts) must be used to install the branch pipe to the indoor unit.

• Install Multikits at the same horizontal level.

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Specic considerations of combinability

Outdoor unit

Combinability

Minimum

nominal

combination

capacity

(HP)

Nominal

combination

capacity

(HP)

Maximum

nominal

combination

capacity

(HP)

Minimum

combination

quantity of

indoor units

Minimum

capacity of

the combined

indoor units

(HP)

Maximum

quantity of

combined indoor units (The sum of the installed

RPK and all

other indoor

units)

RPK restrictions

Maximum number

of combinable RPK

indoor units

(This number of units

is the sum of the

installed RPK-FSN3M

and RPK-FSNH3M with

its expansion valve kit

EV-1.5N1)

RAS-4FS(V)N(Y)3E 2.0 4.0 5.2 1 0.6 (*) 8 6

RAS-5FS(V)N(Y)3E 2.5 5.0 6.5 1 0.6 (*) 10 7

RAS-6FS(V)N(Y)3E 3.0 6.0 7.8 1 0.6 (*) 12 7

(*): Indoor unit of 0.8HP set as 0.6HP by DSW setting only for Set Free Mini Series 3.

Maximum refrigerant piping length

(m)

Item 4HP (5/6)HP

Maximum length from the outdoor unit to the furthest indoor unit (L1)

Actual length ≤ 75

Equivalent length ≤ 95

Maximum length from the 1st multikit to the furthest indoor unit (L2) ≤ 40

Maximum length between multikit and indoor unit (L3)

Case a) Header branch ≤ 15

Case b) Line branch ≤ 10

Maximum height difference between outdoor and indoor unit (Hi-O)

If the outdoor unit is higher than the indoor unit ≤ 30

If the outdoor unit is lower than the indoor unit ≤ 30

Maximum height difference between each indoor unit (H1) ≤ 15

Maximum height difference between multikit and indoor unit (H2) ≤ 5

Total piping length (L1+L31+L32+...+L3

n-1

) ≤ 125 ≤ 135

Choice of each multikit

Case a) Header branch

MH-84AN (4 branches)

MH-108AN (8 branches)

Case b) Line branch E-102SN3

• Considerations by maximum quantity of combined indoor units

All the following points should be taken in consideration when the quantity of indoor units is over the value shown in the following table:

Outdoor unit Quantity of combined indoor units

RAS-4FS(V)N(Y)3E > 6

RAS-5FS(V)N(Y)3E > 8

RAS-6FS(V)N(Y)3E > 9

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ENGLISH

a. The total piping length should be reduced as follows:

(m)

Outdoor unit

Quantity of combined indoor units

≤ 6 7 8 9 10 11 12

RAS-4FS(V)N(Y)3E 125 113 101 - - - -

RAS-5FS(V)N(Y)3E 135 135 135 123 111 - -

RAS-6FS(V)N(Y)3E 135 135 135 135 123 111 99

b. In these cases HITACHI recommends using header branch as distribution system than line branch.

c. For Line branch reduce the maximum length between multikit and indoor unit (L3) to 5m or less.

d. The following considerations must be taken into account:

- Divide the installation into many branches as possible and equilibrate the length and the ratio of total indoor unit connected

capacity of each part.

- Reduce as much as possible the following lengths:

- Height difference between outdoor and indoor unit (Hi-O)

- Height difference between each indoor unit (H1)

- The installation position of big capacity indoor unit should be as far away as possible from the rst branch.

? NOTE

In case of installations not following the above considerations, please contact with your Hitachi dealer for advice.

! CAUTION

In case of exceeding the quantity of indoor units shown before, and in some extreme conditions in terms of piping length and temperature, when all indoor units are in simultaneous operation, performance can decrease and discharge temperature of some indoor units can be lower than comfort temperature.

11.5 REFRIGERANT PIPING SIZE



Table : Outdoor unit to rst multi-kit

Outdoor unit

Pipe size (Ø mm)

Multi-kit

Gas Liquid

RAS-(4-6)FS(V)N(Y)3E 15.88 9.52 E-102SN3



Table : First mukti-kit to last branch

Total indoor units capacity

Pipe size (Ø mm)

Multi-kit

Gas Liquid

<2.3HP 12.7 6.35 E-102SN3

2.3<HP<7.0 15.88 9.52 E-102SN3



Table : Mukti-kit to indoor unit

Indoor unit capacity

(HP)

Pipe size (Ø mm)

Gas Liquid

0.8 to 1.5 12.70 6.35 (*)

2.0 15.88 6.35 (*)

2.5 to 6.0 15.88 9.52

? NOTE

• (*): The pipe size must be the same size of the piping connection hole of the I.U.

• The pipe shown in the above table is applicable for both: the line branch and the header branch.



Table : Header branch

Applicable model

Pipe size (Ø mm) Multi-kit model

Gas Liquid

2~4

Branches

2~8

Branches

RAS-(4-6)FS(V)N(Y)3E 15.88 9.52 MH-84AN

MH-

108AN

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11.6 DISTRIBUTION METHOD

? NOTE

For the following installation types, when the installation is divided into two or more parts, equilibrate the length and the ratio of total indoor unit connected capacity of each part.

11.6.1 Header branch piping system



Installation types



Considerations

Do not connect two header branches consecutively.

Header

Main pipe

Header

CORRECT

INCORRECT

Indoor unit

Header

Indoor

unit

Main pipe

Installation position

Perform to install horizontally always (Example.: In case of model MH-108AN)

Horitzontally

Gas piping side

Liquid piping side

! CAUTION

Seal the end of branch pipes which are not connected, by brazing factory supplied closing pipes.

11.6.2 Line branch piping system



Installation types

? NOTE

Distribution system not recommended for installations with more indoor units than:

• 6 units for RAS-4FS(V)N(Y)3E

• 8 units for RAS-5FS(V)N(Y)3E

• 9 units for RAS-6FS(V)N(Y)3E

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ENGLISH



Considerations

With line distribution method, it is possible to make the rst or

the second main pipe distribution within the third branch.

And do not make the main pipe distribution, at or after the fourth branch.

Branch method

Correct

Max. 40m

Line branch

1st. main piping

distribution

2nd. main piping

distribution

Branched pipe

of main piping

Indoor unit

Incorrect

1st. main piping

distribution

2nd. main piping

distribution

3rd. main piping distribution

Incorrect

Branch method in 3rd multi-kit

Correct (Distribution allowed)

Branch 1

Branch 2

Branch 3

Incorrect

Branch 1

Branch 2

Branch 3

(Main pipe distribution: Distribution from one multi-kit to two multi-kits)

Installation position

• Horizontal installation

Locate the branch pipes on the same horizontal plane. (Inclination within 30°)

Make the straight length a minimum of 0.5m after the vertical bend.

Horizontal

Correct Incorrect

Maximum inclination

of ±30º

Straight length min 0.5m

Downward

Upward

Downward

Maximum inclination

of ±30º

• Vertical installation

Straight length of the pipe connection on the outdoor unit side is made as follows:

- The collective pipe connection part is installed upward,

the straight length must be min. 0.5m.

- The collective pipe connection part is installed downward,

the straight length must be min.0.3m.

Vertical

Correct Correct

Upward

Upward Branch

Upward

Minimum straight length of 0.3 m

Downward

branch

Downward

Minimum straight length

of 0.5 m

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11.6.3 Combination branch piping system



Installation type



Considerations

It is possible to connect the header to the second branch, when

the rst branch is also the line branch.

Do not connect a line branch to a header branch.

Header

Line branch

Header

Indoor unit

Max. 40 m

Second branch

Line branch (First branch)

Header

11.6.4 Brazing work

! CAUTION

• Use nitrogen gas for blowing during pipe brazing. If oxygen, acetylene or uorocarbon gas is used, it will cause an explosion or poisonous gas.

• A lot of oxidation lm will occur inside of tubes if no nitrogen gas blowing is performed during brazing work. This lm will be ecked off after operation and will circulate in the cycle, resulting in clogged expansion valves, etc. This will cause bad inuence to the compressor.

• Use a reducer valve when nitrogen gas blowing is performed during brazing. The gas pressure should be maintained within 0.03 to 0.05 Mpa. If a excessively high pressure is applied to a pipe, it will cause an explosion.

11.6.5 Refrigerant charge

! CAUTION

• Do not charge OXYGEN, ACETYLENE, or other ammable and poisonous gases into the refrigerant because an explosion can occur. It is recommended that oxygen free nitrogen be charged for these types of tests cycle when performing a leakage test or an airtight test. These types of gases are extremely dangerous,

• Insulate the unions and are-nuts at the piping connection part completely.

• Insulate the liquid piping completely to avoid a decrease of performance; if not, it will cause sweating on the surface of the pipe.

• Charge refrigerant correctly. Overcharging or insufcient charging could cause a compressor failure.

• Check for refrigerant leakage in detail. If a large refrigerant leakage occurred, it would cause difculty with breathing or harmful gases would occur if a re were being used in the room.

• If the are nut is tightened too hard, the are nut may crack after a long time and cause refrigerant leakage.

11.7 CAUTION OF THE PRESSURE BY CHECK JOINT

When the pressure is measured, use the check joint of gas stop

valve (A), and use the check joint of liquid piping (B) in the gure

below.

At that time, connect the pressure gauge according to the following table because of high pressure side and low pressure side changes by operation mode.

Cooling

operation

Heating

operation

Check joint for gas stop valve “A” Low pressure High pressure

Check joint for piping “B” Exclusive for vacuum pump

Check joint for liquid stop valve “C” High pressure Low pressure

? NOTE

Be careful that refrigerant and oil do not splash to the electrical parts at removing the charge hoses.

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ENGLISH

11.8 REFRIGERANT CHARGE AMOUNT

Although refrigerant has been charged into this unit, additional refrigerant charge is required according to piping length.

• The additional refrigerant quantity should be determined and charged into the system according to the following procedure.

• Record the additional refrigerant quantity in order to facilitate maintenance and servicing activities.



Refrigerant charge before shipment (W0 (kg))

W0 is the outdoor unit refrigerant charge before shipment (Factory charge), and it’s shown in the following table:

Model

Refrigerant charge before shipment

(W0 (kg))

RAS-4FS(V)N(Y)3E

3.6RAS-5FS(V)N(Y)3E

RAS-6FS(V)N(Y)3E

! CAUTION

• When charging refrigerant, measure the amount precisely.

• Overcharging or undercharging of refrigerant may cause compressor

problems.



Additional refrigerant charge calculation

method

Calculate the additional refrigerant charge amount (Additional charge) according to the following steps:

Step 1: Additional refrigerant charge calculation for liquid piping (W1 (kg))

The additional refrigerant charge must be calculated by multiplying the total piping length of each diameter per its calculation factor according to the following table. The result is the additional refrigerant charge for liquid piping.

Pipe size (mm)

Additional refrigerant charge factor

(kg/m)

Ø9.52 x 0.05

Ø6.35 x 0.02

Step 2: Charging work

Charge refrigerant (R410A) into the system according to the instructions in the Service Manual.

Step 3: Total refrigerant charge of the system (W

TOT

(kg))

The total refrigerant charge (Total charge) of this system is calculated by the following formula:

TOT

= W + W

System example (W

TOT

) = + = kg

W0 is the outdoor unit refrigerant charge before shipment

explained before, and it’s shown in its specic table.

Finally, record the refrigerant charge quantity in the F-Gas label order to facilitate maintenance and servicing activities.



Additional refrigerant charge calculation

example

Example of quadruple system for RAS-6FS(V)N(Y)3E

RAS-6HP

RCI-1.5HP

RCI-1.0HP

RCI-2.5HP

9.52

Step 1: Additional refrigerant charge calculation for liquid piping (W1 (kg))

Calculate the additional refrigerant charge for the liquid piping

as indicated below. Check the example and ll in the following

table.

Pipe size

(mm)

Total piping length

(m)

Additional refrigerant

charge (kg/m)

Subtotal

(kg)

Ø9.52 10 + 5 + 5 x 0.05 1.0

Ø6.35 10 + 5 x 0.02 0.3

TOTAL W1 = 1.3

Step 2: Total refrigerant charge of the system (W

TOT

(kg))

The total refrigerant charge of this system is calculated by the following formula:

TOT

= W0 + W

Refrigerant charge before shipment (W0) = 3.6 kg (Refer to its

specic table)

TOT

= 3.6 + 1.3 = 4.9 kg

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11.9 PUMP DOWN REFRIGERANT

When the refrigerant should be collected into the outdoor unit due to indoor/outdoor unit relocation, collect the refrigerant as follows:

1 Attach the manifold gauge to the gas stop valve and the

liquid stop valve

2 Turn ON the power source 3 Set the DSW1-1 pin of the outdoor unit PCB at the “ON” side

for cooling operation. Close the liquid stop valve and collect the refrigerant.

4 When the pressure at lower pressure side (gas stop valve)

indicates -0.01 MPa (-75 mmHg), perform the following procedures immediately.

- Close the gas stop valve.

- Set the DSW1-1 pin at the “OFF” side (To stop the unit

operation).

5 Turn OFF the power source.

! CAUTION

Measure the low pressure by the pressure gauge and keep it not to decrease than -0.01 MPa. If the pressure is lower than

-0.01 MPa, the compressor may be faulty.

DIP switch

(DSW1-1 ON)

Manifold gauge

Gas stop valve

Liquid

stop

valve

12 DRAIN PIPING

12.1 DRAIN DISCHARGING BOSS

When the base of the outdoor unit is temporarily utilized as a drain receiver and the drain water in it is discharged, this drain boss is utilized to connect the drain piping.

Model Applicable Model

DBS-26 FS(V)N(Y)3E



Connecting procedure

1 Insert the rubber cap into the drain boss up to the extruded

portions.

2 Insert the boss into the unit base and turn approximately 40

degree counterclockwise.

3 Size of the drain boss is 26 mm (O.D.). 4 A drain pipe should be eld-supplied.

? NOTE

Do not use this drain boss set in a cold area, because the drain water may freeze.This drain boss is not sufcient to collect all the drain water. If collecting drain water is completely required, provide a drain-pan that is bigger than the unit base and install it under the unit with drainage.

Rubber cap

Drain boss

Extruded portion

Drain pipe

Drain hole

of base

DRAIN PIPING

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ENGLISH

13 ELECTRICAL WIRING

13.1 GENERAL CHECK

1 Ensure that the eld-supplied electrical components (mains

power switches, circuit breakers, wires, connectors and wire terminals) have been properly selected according to the electrical data indicated. Make sure that they comply with national and regional electrical codes.

2 Following the Council Directive 2004/108/EC (89/336/EEC),

relating to electromagnetic compatibility, next table indicates: Maximum permissible system impedance Z

max

at the interface

point of the user’s supply, in accordance with EN61000-3-11

MODEL Z

max

(Ω)

RAS-4FSVN3E / 4FSNY3E 0.29/ -

RAS-5FSVN3E / 5FSNY3E 0.29/ -

RAS-6FSVN3E / 6FSNY3E 0.29/ -

3 Harmonics situation of each model regarding IEC 61000-3-2

and IEC 61000-3-12 is as follows:

MODELS SITUATION REGARDING IEC 61000-3-2 AND IEC 61000-3-12

Ssc “xx”

MODELS

Ssc

“xx”

(kVA)

Equipment complying with IEC 61000-3-2 (professional use)

RAS-(4~6FSNY3E) -

Equipment complying with IEC 61000-3-12

RAS-(4~6FSVN3E) -

4 Check to ensure that the power supply voltage is within +/-

10% of the rated voltage.

5 Check to ensure that power supply has an impedance low

enough to warranty not reduce the starting voltage more than 85% of the rated voltage.

6 Check to ensure that the capacity of power supply is enough.

If not, the compressor will be not able to operate because of abnormal voltage drop at starting.

7 Check to ensure that the ground wire is connected. 8 Connect a fuse of specied capacity.

! CAUTION

• Check to ensure that screws for terminal block are tightly tightened.

• Check to ensure that the indoor fan and the outdoor fan have stopped

before electrical wiring work or periodical check is performed.

• Protect the wires, drain pipe, electrical parts, from rats or other small animals. If not protected, rats may damage unprotected parts, and at the worst, a re will occur.

• Avoid the wiring from touching the refrigerant pipes, plate edges and electrical parts inside the unit.

• If not do, the wires will be damaged and at worst, a re will occur.

• Wrap the accessory packing around the wires, and plug the wiring

connection hole with the seal material to protect the product from any condensed water and insects.

• Tightly secure the wires with the cord clamp inside the indoor unit.

• Lead the wires through the knockout hole in the side cover when us-

ing conduit.

• Secure the cable of the remote control switch with the cord clamp inside the electrical box.

• Electrical wiring must comply with national and local codes. Contact your local authority in regards to standards, rules, regulations, etc.

• Check that the ground wire is securely connected.

• Connect a fuse of specied capacity.

! DANGER

• Do not connect of adjust any wiring or connections unless the

main power switch is OFF.

• Check that the earth wire is securely connected, tagged and locked in accordance with national and local codes.

? NOTE

Check and test to ensure that if there is more than one source of power supply, that all are turned OFF.

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Page 28

13.2 ELECTRICAL WIRING CONNECTION FOR OUTDOOR UNITS

The correct electrical wiring connection for the outdoor unit is shown below:

1 Using the appropriate cable, connect the power circuit to the appropriate terminals as shown on the wiring label and the

illustration below. Connect the power supply cables L1 and N (for 230V 50Hz) or L1, L2, L3 and N (for 400V 50Hz) to the terminal board, and the earth conductor to the earth screw in the electrical box base plate.

RAS-(4-6)FSVN3E RAS-(4-6)FSNY3E

Earth terminal

Power wires

Transmission

wires

Earth terminal

Power

wires

Transmission

wires

2 Connect the transmission wires between the outdoor unit and the indoor unit to the terminals 1 and 2 on the terminal board.

Power supply AC 230 V

Transmission wires (5 V)

Power supply AC 400 V

1~ 230V 50Hz

3N~ 400V 50Hz

3 Fix the cable with the clamp supplied in the Electrical Box to ensure strain relief. 4 When routing out cable, make sure that it does not obstruct mounting of the outdoor service cover.

Wiring Method

Keep a distance between each wiring terminal and attach insulation tape or

sleeve as shown in the gure.

Tape or sleeve

Earth screw

Rear cover

Earth wire

Power supply cable

Control cable

Wiring method with clamp

1 Insert the wires into the cord clamp and clamp

them as shown in the gure.

2 Perform wiring so that wires do not touch the

compressor, refrigerant pipes or edge of the covers.

Make a loop of wires so that disconnecting the wirings

for replacing the parts is not required.

Fasten the wires so that wires do not touch the high

temperature compressor and the other parts.

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ENGLISH

13.3 SETTING OF DIP SWITCHES, ROTARY SWITCHES AND JUMPERS

13.3.1 Printed circuit board (PCB)

RAS-(4-6)FS(V)N(Y)3E

13.3.2 Setting of DIP switches, rotary switches and jumpers



DSW1: For Test Run

Setting before shipment

? NOTE

With the DSW1, the unit starts or stops after 10 to 20 seconds of the switch being activated.



DSW2: Optional Function Setting

Setting before shipment (RAS-(4-6)FS(V)N(Y)3E)

Pin Nº Setting Item

1 OFF (Fixed)

2 OFF (Fixed)

3 OFF (Fixed)

4 OFF (Fixed)

5 Function Selection Setting (Selection is Set by PSW)

6 External Input/Output Selection (Selection is Set by PSW)



DSW3: Capacity

No setting is required

RAS-4FSVN3E RAS-5FSVN3E

RAS-6FSVN3E RAS-4FSNY3E

RAS-5FSNY3E RAS-6FSNY3E



Refrigerant Cycle No. Setting

DSW4

Setting position (Setting for the ten digit).

RSW1

Setting position.

(Setting for the last digit).



DSW5: Transmission Setting of End Terminal

Resistance

Setting before shipment



DSW6: Other settings

Setting before shipment

Indoor units are higher than Outdoor units

(h > 20m)

Fine-tuning of Heating Capacity



JP1~6: Jumper cable

No setting is required

JP1 cut: Fixing Cooling Mode JP5 cut: Alternative Defrosting JP6 cut: High-Pressure Control Based on R407C Piping

ELECTRICAL WIRING

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13.4 COMMON WIRING

13.4.1 Electrical wiring between indoor unit and outdoor unit

Connect the electrical wires between the indoor unit and the outdoor unit, as shown below.

• The refrigerant piping and the control wiring are connected to the units in the same refrigerant cycle.

• Use twist pair wire (> 0.75 mm²) for operation wiring between outdoor unit and indoor unit, and operation wiring between indoor unit and indoor unit.

• Use 2-core wire for the operating line (Do not use wire with more than 3 cores).

• Use shielded wires for intermediate wiring to protect the units from noise obstacle at length of less than 300 m and size complied with local code.

• Open a hole near the connection hole of power source wiring when multiple outdoor units are connected from one power source line.

• The recommended circuit-breaker sizes are shown in the table of electrical data and recommended wiring and breaker sizes / 1 O.U..

• In the case that a conduit tube for eld-wiring is not used, x rubber bushes with adhesive on the panel.

• All the eld wiring and equipment must comply with local and international codes.

• H-LINK twist pair shielded cable must be grounded in the outdoor unit side.

! CAUTION

Pay attention to the connection of the operating line. Incorrect connection may cause the failure of PCB.

Power source from the outdoor unit to the indoor unit Independent power source of outdoor unit and indoor unit

No. 0 System

Outdoor unit

No. 0 System

Outdoor unit

Operating Line (Twisted shielded pair cable or shielded pair cable)

DC5V (Non-Pole Transmission, H-LINK System)

Remote

control switch

Operating Line (Twisted shielded pair cable or shielded pair cable)

DC5V (Non-Pole Transmission, H-LINK System)

Remote control

switch

Indoor unit

Terminal board Circuit Breaker

Earthleakage Breaker

Field Wiring

Field supplied

Optional Accessory

ELECTRICAL WIRING

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ENGLISH

13.4.2 Wire size



Connection wiring

Recomended minimum sizes for eld provided wires:

Model Power supply Max. current (A)

Power source cable size Transmitting cable size

EN60 335-1 EN60 335-1

All Indoor Units

1~ 230V 50Hz

5.0 0.75 mm²

0.75 mm²

RAS-4FSVN3E 26.0 6.0 mm

RAS-5FSVN3E 26.0 6.0 mm²

RAS-6FSVN3E 26.0 6.0 mm²

RAS-4FSNY3E

3N~ 400V 50Hz

13.0 4.0 mm²

RAS-5FSNY3E 13.0 4.0 mm²

RAS-6FSNY3E 13.0 4.0 mm²

? NOTE

• Follow local codes and regulations when selecting eld wires, Circuit breakers and Earth Leakage breakers

• Use the wires which are not lighter than the ordinary polychloroprene sheathed exible cord (code designation H05RN-F)



Main switch protection

Select the main switches in according to the next table:

Model Power source

Max. Current

(A)

ELB

(no. poles/A/mA)

All Indoor Units

1~ 230V 50Hz

5.0 6

2/40/30

RAS-4FSVN3E 26.0 32

RAS-5FSVN3E 26.0 32

RAS-6FSVN3E 26.0 32

RAS-4FSNY3E

3N~ 400V 50Hz

13.0 20

4/40/30

RAS-5FSNY3E 13.0 20

RAS-6FSNY3E 13.0 20

ELB: Earth leakage breaker; CB: Circuit breaker

ELECTRICAL WIRING

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13.5 H-LINK II SYSTEM

The H-LINK II is the wiring connection system between units.

The H-LINK II wiring system only needs:

• Two transmission wires connecting each indoor and outdoor unit for a total of 64 refrigerant cycles.

• Connection wiring for all indoor and outdoor units in series.

13.5.1 Application

The H-LINK II system can be applied to the following models:

Indoor Unit

Outdoor Unit

System Free

RCI

RAS-(4-6)FS(V)N(Y)3E

RCIM

RCD

RPI

RPIM

RPK

RPF

RPFI

RPC

! CAUTION

The H-LINK II system cannot be applied to the models with the old cycle, nor to units with an old transmission.

13.5.2 Features

• The total wiring length is considerably reduced compared to traditional connections.

• Only one connection is required for the wiring between the indoor and outdoor units.

• The wiring connection of the complementary central control devices is easy.

? NOTE

CSNET WEB / CSNET Manager is centralized control system which allows the installation to be controlled remotely. They can be connected at any point of the local corporate network, or even via the Internet.

13.5.3 Specications

• Transmission cable: 2-wire.

• Polarity of transmission cable: non-polar wire.

• Maximum number of indoor units that can be connected: 4 units per cycle and 160 units per H-LINK II system.

• Maximum wiring length: total 1000 m (including CSNET WEB / CSNET Manager).

• It is possible to increase the maximum wiring length up to 5000 m by using up to four PSC-5HR units.

• Recommended cable: shielded twisted pair cable, over

0.75 mm2 (Equivalent to KPEV-S).

• Voltage: 5 V DC.

! CAUTION

For the H-LINK II system must use twisted shielded pair cable or shielded pair cable

CSNET WEB / CSNET MANAGER

A refrigerant cycle

Transmission cables

Refrigerant piping

Outdoor unit

Indoor units

ELECTRICAL WIRING

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ENGLISH

13.5.4 DIP switch setting for multiple H-LINK system

The DIP switches of all the outdoor and indoor units have to be set as follows:

Unit Name of DIP switch Mark

Setting before the

shipment

Function

Outdoor unit

Terminal resistance DSW5

DSW5-1 is “ON” position before shipment.

• It is not necessary to set when H-LINK is connected with

only one outdoor unit.

• When H-LINK is connected with more than one outdoor

unit, set as follows:

- First outdoor unit: Keep DSW5-1 in “ON”.

- Other outdoor units: Set DSW5-1 to “OFF”.

Refrigerant cycle

DSW4 RSW1

For setting the refrigerant cycle address of the outdoor unit. Set the DSW4 and RSW1 to overlap the setting of other outdoor units in the same H-LINK system.

Indoor unit

Refrigerant cycle

DSW5 RSW2

DSW5

RSW2

For setting the refrigerant cycle address of the indoor unit. Set the DSW5 and RSW2 corresponding to the address of outdoor unit in the same refrigerant cycle.

Address of the

indoor unit

DSW6 RSW1

DSW6

RSW1

Setting indoor unit address. Set the DSW6 and RSW1 not to overlap the setting of other indoor units in the same refrigerant cycle. (If no set, the automatic address function is performed.)

Example of the setting of the DIP switches.

(00) (01)

(02)

(00) (00) (00) (00) (01) (01)

(02)

(02) (02)

(00) (01) (02) (03) (00) (01)

(00)

(01) (02)

Indoor units

Outdoor units

Cycle number 0

Cycle number 1

Cycle number 2

DSW5

Terminal resistance

DSW4

Number of refrigerant cycle.

(setting for tenth digit

)

RSW1

Number of refrigerant cycle (setting for last digit)

DSW6

Address of the indoor unit

(setting for the tenth digit)

DSW5

Number of refrigerant cycle.

(setting for tenth digit)

RSW2

Number of refrigerant cycle

(setting for last digit)

RSW1

Address of the indoor unit

(setting for the last digit)

ELECTRICAL WIRING

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14 INSTALLATION OF REMOTE CONTROLLER

14.1 INSTALLATION OF REMOTE CONTROL SWITCH

PC-ART

All data related to Installation about Remote Control Switch are in the specic Installation Manual.

Please refer to the Installation and Operation manual corresponding to the remote control switch model.

15 TEST RUNNING

When installation is completed, perform test run according to the following procedure, and hand over the system to the customer.

Perform test run regarding indoor units one by one in order, and conrm that the electrical wiring and the refrigerant piping are

correctly connected.

Test run should be performed according to the Test Run Procedure on next page.

! CAUTION

Do not operate the system until all the check points have been cleared:

• Check to ensure that the electrical resistance is more than 1 MΩ, by measuring the resistance between ground and the terminal of the electrical parts. If not, do not operate the system until the electrical leakage is found and repaired. Do not impress the voltage on the terminals for transmission 1 and 2.

• Check to ensure that the stop valves of the outdoor unit are fully opened, and then start the system.

• Check to ensure that the switch on the main power source has been ON for more than 12 hours, to warm the compressor oil by the oil heater

Pay attention to the following items while the system is running:

• Do not touch any of the parts by hand at the discharge gas side, since the compressor chamber and the pipes at the discharge side are heated higher than 90°C.

• DO NOT PUSH THE BUTTON OF THE MAGNETIC SWITCH(ES), it will cause a serious accident.

• Do not touch any electrical components for more than three minutes after turning OFF the main switch

• Conrm that the gas line stop valve and the liquid line stop valve are fully open.

• Conrm that the leakage of the refrigerant does not exist. The are nuts are sometimes loosened by vibration during transportation.

• Check that the refrigerant piping and the electrical wiring conform to the same system.

• Conrm that the dip switch setting on the printed circuit board of the indoor units and the outdoor units are correct.

• Check whether or not the electrical wiring of the indoor units and the outdoor units are connected as shown in the chapter Electrical Wiring.

! CAUTION

Conrm that eld-supplied electrical components (main switch fuse, fuse-free breaker, earth leakage breakers, wires, conduit connectors and wire terminals) have been properly selected according to the electrical data given in the Technical Catalog of the unit and ensure that the components comply with national and local codes.

? NOTE

For more reference check Troubleshooting chapter.

INSTALLATION OF REMOTE CONTROLLER

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Page 35

ENGLISH

15.1 TEST RUN PROCEDURE BY REMOTE CONTROL SWITCH (PC-ART)



Turn ON the power source of the Indoor and Outdoor Units



Counting number of connected units



Operation lamp



Set the TEST RUN mode by remote control switch.

Depress the “MODE” and the “

OK” switches simultaneously

for more than 3 seconds.

a. If “TEST RUN” and the counting number of the

connected units to the remote control switch (for example “05”) are indicated on the remote control

switch, the connection of remote control cable is correct.→Go to



b. If no indication appear or the number of the units

indicated is smaller than the actual number of the units, some abnormalities exist.→Go to



Remote Control

Switch Indication

Wrong Portions Inspection Points after Power Source OFF

No indication

The power source of Outdoor Unit is not turned ON.

The connection of the remote control cable is incorrect.

1 Connecting Points of Remote Control Cable terminal board of Remote

Control switch and indoor unit.

2 Contact of Terminals of Remote Control Cable

The connecting wires of power supply line are incorrect or loosened.

3 Connection Order of each Terminal Board 4 Screw Fastening of each Terminal Boards.

Counting number of connected units is incorrect

The power source of Outdoor Unit is not turned ON.

The operating line wiring between indoor unit and outdoor unit is not connected.

The connection of control cables between each indoor units are incorrect. (When one remote control switch controls multiple units)

5 Dip Switch Setting on Printed Circuit Board 6 Connecting on the PCB

7 This is the same as item  1, 2 , and 3.

Back to

 after checking



Select TEST RUNNING MODE by depressing MODE Switch (COOL OR HEAT)



Depress RUN/STOP switch.

a. The TEST RUN operation will be started. (The 2 hours OFF-TIMER will be set and the TEST RUN operation will be nished after 2

hours unit operation or by depressing the RUN/STOP switch again).

? NOTE

• TEST RUN operation ignores the temperature limitation and ambient temperature during heating operation to have a continuous operation, but the protections are alive. Therefore, the protection may activate when the heating TEST RUN operation is performed in high ambient temperature.

• TEST RUN operation time can be modied / increased depressing the time switch in the Remote Control.

b. If the unit do not start or the operation lamp on the remote control switch is ickered, some abnormalities exist. →Go to 

TEST RUNNING

PMML0354A rev.1 - 03/2015

Page 36



Remote Control

Switch Indication

Unit Condition Wrong Portions

Inspection Points after

Power Source OFF

The operation lamp

ickers. (1 time/1 sec.)

And the Unit No. and

Alarm Code “03” icker

The unit does not start.

The power source of Outdoor Unit in not turned ON.

The connecting wires of operating line are incorrect or loosened.

1 Connecting Order of each Terminal

Board.

2 Screw fastening of each Terminal

Boards.

? NOTE

Recovering method of FUSE for operating circuit. There is a fuse (FUSE4 on Indoor Unit PCB1, EF1 on Outdoor Unit PCB1) to protect operating circuit on the PCB, when the power lines are connected to operating lines. If fuse is melted, operating circuit can be recovered once by setting the dip switch on the PCB as

shown in 

The operation lamp

ickers. (1 time/2 sec.)

The unit does not start.

Remote control cable is broken.

Contact of connectors is not good.

The connection of remote control cable is incorrect

This is the same as item

 1 and 2

Indication of Flicker except above

The unit does not start, or start once and then stops

The connection of thermistor or other connectors are incorrect. Tripping of protector exists, or else.

Check by the abnormality mode table in the Technical Catalogue (Do it by service people).

The operation lamp Flickers. (1 Time/1s)

Unit No.

00, Alarm

Code  and Unit Code

00 icker

The unit does not start.

The connection of the remote control cable between Indoor Units is incorrect.

Check by the abnormality mode table in the Technical Catalog (Do it by service people).

Back to

 after checking



Instructions for the recovery when the fuse of the transmission circuit is blown out:

1 Correct the wiring to the terminal board. 2 Set the 1st pin of DSW7 on the indoor unit PCB to ON.

Set the DSW7 on the indoor unit PCB to ON. (Only RPK-1.0/1.5)

Except RPK 1.0/1.5 Only RPK-1.0/1.5

15.2 TEST RUN FROM OUTDOOR UNIT SIDE

The procedure of test run from outdoor unit side is indicated below. Setting of this DIP switch is available with the power source ON.

Setting of Dip Switch (Before Shipment)

DSW1

Switch for setting of Service Operation and Function

1 Test Run 2 COOL/HEAT 3 Setting (ON: Heat Operation) 4 OFF (Fixed) 5 Manual Compressor stop

! CAUTION

• Do not touch any other electrical parts when operating switches on the PCB

• Do not attach or detach service cover when the power source for the outdoor unit is ON and the outdoor unit is operated.

• Turn all DIP switches of DSW1 OFF when the test run operation is completed.

TEST RUNNING

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ENGLISH

Operation Dip Switch Setting Operation Remarks

Test Run



Setting of Operation Mode:

Cooling: Set DSW1-2 OFF.

Heating: Set DSW1-2 ON.

 Starting Test Run:

Set DSW1-1 ON and the operation is started after a few ~20 seconds.

When heating operation, leave DSW1-2

at ON ↓

 The indoor unit automatically start to operate when the test run of the outdoor unit is set.



The ON/OFF operation can be performed from the remote control switch or DSW1-1 of the outdoor unit.



Continuous operation during 2 hours is performed without ThermoOFF.

? NOTE

TEST RUN operation time can be increased depressing the time switch in the remote control.

• Take care that the indoor units start

operation in accord with the test run operation of the outdoor unit.

• The test run is started from the outdoor

unit and stopped from the remote control switch, the test run function of the remote control switch is cancelled. However, the test run function of the outdoor unit is not cancelled

• In case that the plural indoor units are

connected with one remote control switch, all the units start test run operation at the same time, therefore, turn the power source OFF for the indoor units not to operate test run. In this case, the “TEST RUN” indication of

the remote control switch may icker,

and this is not abnormal.

• The setting of DSW1 is not required

for the test run from the remote control switch.

Manual OFF of Compressor



Setting:

Compressor Manual OFF:

Set DSW1-4 ON.

Compressor ON:

Set DSW1-4 OFF.

 When DSW1-4 is ON during compressor operation, the compressor stops to operate immediately and the indoor unit is under the condition of Thermo-OFF.



When DSW1-4 is OFF, the compressor starts to operate after the cancellation of 3-minutes guard.

• Do not repeat compressor ON/OFF

frequently.

Manual Defrost



Manual Defrost Operation Starts

Press PSW1 for more than 3 seconds during heating operation, the defrost operation is started after 2 minutes. This function is not available within 5 minutes after starting heating operation



Manual Defrost Operation Finishes

Defrost operation is automatically ended and the heating operation is started.



Defrost operation is available regardless of frosting condition and

total time of heating operation.



Defrost operation in not performed when the temperature of outdoor heat exchanger is higher than 10°C, high pressure is higher than 3.3 MPa (33kgf/ cm2G) or Thermo-OFF.

• Do not repeat defrost operation

frequently.

TEST RUNNING

PMML0354A rev.1 - 03/2015

Page 38

16 SAFETY SUMMARY & CONTROL DEVICE SETTING



Compressor Protection

High Pressure Switch:

This switch cuts out the operation of the compressor when the discharge pressure exceeds the setting.



Fan Motor Protection

When the thermistor temperature is reached to the setting, motor output is decreased.

The other way, when the temperature becomes lower, limitation is cancelled.

Model RAS-(4-6)FSVN3E RAS-(4-6)FSNY3E

For Compressor

Automatic Reset. Non-Adjustable (each one for each compressor)

Pressure Switches

-0.05 -0.05

High Cut-Out MPa 4.15 4.15

-0.15 -0.15

Cut-In MPa 3.20±0.15 3.20±0.15

For Control

Fuse 1~ 230V 50Hz

3N~ 400V 50Hz

2X20

CCP Timer

min.

Setting Time 3 3

For Condenser Fan Motor

Automatic Reset. Non-Adjustable (each one for each motor)

Internal Thermostat

Cut-Out ºC - -

For Control Circuit

A 5 5

Fuse Capacity on PCB

17 TROUBLESHOOTING

Alarm Code Indication of Remote Control Switch:

Abnormal indoor unit number

Abnormal refrigerant cycle number Alarm code Model code

Connected number of indoor units Alarm code

Model Code

Indication Model



Heat-Pump

COOL

MED

ADDS. RN

A/C AL

ARM

Indicated

for a

second

alternately

COOL

MED

ADDS. RN

A/C AL

ARM



Inverter



Multi (Set-Free)



Cooling Only



Others



IVX, individual operation

KPI

SAFETY SUMMARY & CONTROL DEVICE SETTING

PMML0354A rev.1 - 03/2015

Page 39

ENGLISH

Code

number

Category Abnormality Cause

01 Indoor unit Activation of the safety device

Failure of fan motor, drain discharge, PCB, relay, oat switch

activated

02 Outdoor unit Activation of the safety device

Activation of PSH, locked motor, abnormal operation in the power supply phase

Transmission

Abnormal transmission between outdoor and indoor units

Incorrect wiring, failure of PCB, tripping of fuse, power supply OFF

Abnormal transmission between inverter PCB (DIP-IPM) and outdoor unit PCB (PCB1)

Abnormal transmission between PCB

05 Power supply Abnormal operation of picking up phase signal

Main power supply phase is reversely connected or one phase is not connected.

06 Voltage

Excessively low voltage or excessively high voltage for the inverter

Incorrect wiring or insufcient capacity of power supply wiring

Cycle

Decrease in discharge gas superheat

Discharge gas superheat less than 10 degrees is maintained for 30 minutes.

Excessively high discharge gas temperature at the top of compressor

Temperature of top compressor: Td Td > 132°C over 10 minutes, or Td >140°C over 5 minutes

Sensor on indoor

unit

Air inlet thermistor

Failure of thermistor, sensor, connection.

12 Air outlet thermistor

13 Freeze protection thermistor

14 Gas piping thermistor

15 Econofresh

Abnormal operation of thermistor for fresh outdoor air

Sensor on indoor

unit

Remote thermistor Failure of thermistor

17 Thermistor of RCS Failure of thermistor

Activation of the protection device for the indoor fan motor

Failure of fan motor

Sensor on

outdoor unit

High pressure sensor Incorrect wiring, disconnected wiring, broken cable, short circuit.

Thermistor for outdoor ambient temperature (THM7)

Failure of thermistor, sensor, connection.

23 Thermistor for discharge gas temperature (THM9) Incorrect wiring, disconnected wiring, broken cable, short circuit.

24 Thermistor for evaporating temperature (THM8) Failure of thermistor, sensor, connection.

29 Low pressure sensor Incorrect wiring, disconnected wiring, broken cable, short circuit.

System

Incorrect capacity setting or combined capacity between outdoor and indoor units

Incorrect setting of the capacity code.

35 Incorrect indoor unit number setting

Duplication of indoor unit number , number of indoor units over

specications.

36 Incorrect indoor unit combination R22 indoor unit

Abnormality of picking up circuit for protection (Outdoor unit)

Failure of indoor unit PCB, incorrect wiring, connection to PCB in indoor unit.

Pressure

Activation of the safety device from compression ratio decrease

Abnormal compress (Compressor, Inverter damage)

Activation of the safety device from excessively high suction pressure

Overload during cooling, high temperature with heating, loked expansion valve

Activation of the safety device from excessively high discharge pressure

Overload (obstruction of HEX, short circuit) mixture of inert gas

Activation of the safety device from excessively low suction pressure (protection from vacuum operation)

Shortage or leakage of refrigerant, piping clogging, expansion valve close-locked, fan motor locked.

TROUBLESHOOTING

PMML0354A rev.1 - 03/2015

Page 40

Code

number

Category Abnormality Cause

Inverter

Activation of overcurrent protection activation for inverter

Failure of DIP-IPM, heat exchanger clogged, locked compressor, EVI/EVO failure or overcharge.

51 Abnormality of current sensor for inverter Failure of control PCB, inverter module.

53 Protection activation of inverter module

Inverter module abnormality. Failure of compressor, clogging of heat exchanger.

54 Inverter n temperature increase

Abnormal inverter n thermistor, clogging of heat exchanger,

abnormal outdoor fan.

55 Inverter module abnormality Failure of inverter module.

57 Outdoor fan Fan motor abnormality

Disconnected wire of incorrect wiring between control PCB and inverter PCB. Incorrect wiring or fan motor abnormality.

Indoor unit

number setting

Incorrect setting of the unit and the refrigerant cycle number.

Over 64 indoor units setting by number or indoor unit address.

b5 Incorrect indoor unit connection number setting

There are more than 17 units not corresponding to H-Link II connected to one system

EE Compressor Compressor protection Failure of compressor.

TROUBLESHOOTING

PMML0354A rev.1 - 03/2015

Page 41

Hitachi Air Conditioning Products Europe, S.A.U. Ronda Shimizu, 1 - Políg. Ind. Can Torrella 08233 Vacarisses (Barcelona) Spain