Panasonic U-4le1e5 User manual

85464369493022 2011

Outdoor Units

U-4LE1E5,U-5LE1E5, U-6LE1E5, U-4LE1E8, U-5LE1E8, U-6LE1E8

Unités extérieures

U-4LE1E5,U-5LE1E5, U-6LE1E5, U-4LE1E8, U-5LE1E8, U-6LE1E8

Außeneinheiten

U-4LE1E5,U-5LE1E5, U-6LE1E5, U-4LE1E8, U-5LE1E8, U-6LE1E8

Unità esterne

U-4LE1E5,U-5LE1E5, U-6LE1E5, U-4LE1E8, U-5LE1E8, U-6LE1E8

Unidades exteriores

U-4LE1E5,U-5LE1E5, U-6LE1E5, U-4LE1E8, U-5LE1E8, U-6LE1E8

Εξωτερικές Μονάδες

U-4LE1E5,U-5LE1E5, U-6LE1E5, U-4LE1E8, U-5LE1E8, U-6LE1E8

Unidades exteriores

U-4LE1E5,U-5LE1E5, U-6LE1E5, U-4LE1E8, U-5LE1E8, U-6LE1E8

Buiteneenheden

U-4LE1E5,U-5LE1E5, U-6LE1E5, U-4LE1E8, U-5LE1E8, U-6LE1E8

Външни модули

U-4LE1E5,U-5LE1E5, U-6LE1E5, U-4LE1E8, U-5LE1E8, U-6LE1E8

Внешние блоки

U-4LE1E5,U-5LE1E5, U-6LE1E5, U-4LE1E8, U-5LE1E8, U-6LE1E8

Зовнішні агрегати

U-4LE1E5,U-5LE1E5, U-6LE1E5, U-4LE1E8, U-5LE1E8, U-6LE1E8

INSTALLATION INSTRUCTIONS

– Mini VRF System Air Conditioner –

for Refrigerant R410A

INSTRUCTIONS D’INSTALLATION – Climatiseur Système Mini-VRF –

pour réfrigérant R410A

EINBAUANLEITUNG – Mini VRF System-Klimaanlage –

für Kühlmittel R410A

ISTRUZIONI PER L’INSTALLAZIONE

– Condizionatore d’aria VRF Mini –

per refrigerante R410A

INSTRUÇÕES DE INSTALAÇÃO – Sistema de Ar Condicionado Mini VRF –

para Refrigerante R410A

ΟΔΗΓΙΕΣ ΤΟΠΟΘΕΤΗΣΗΣ – Κλιματιστικό σύστημα Mini VRF –

για το ψυκτικό R410A

INSTRUCCIONES DE INSTALACIÓN

– Acondicionador de aire del sistema Mini VRF –

para refrigerante R410A

INSTALLATIE-INSTRUCTIES

– Mini VRF Systeem Airconditioner –

voor koelmiddel R410A

ИНСТРУКЦИИ ЗА МОНТАЖ – Климатик мини система VRF –

за хладилен агент R410A

ИНСТРУКЦИИ ПО УСТАНОВКЕ – Кондиционер системы Mini VRF –

для хладагента R410A

ВКАЗІВКИ ЩОДО ВСТАНОВЛЕННЯ

– Система кондиціювання повітря Mini VRF –

для охолоджувача R410A

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– Mini VRF System Air Conditioner –

■ R410A Models

Model No.

Outdoor Units

4 hp 5 hp 6 hp

U-4LE1E5

U-4LE1E8

U-5LE1E5

U-5LE1E8

U-6LE1E5

U-6LE1E8

* Refrigerant R410A is used in the outdoor units.

hp = horsepower

Indoor Units

Indoor Unit Type 22 28 36 45 56

D1 1-Way Cassette S-28MD1E5 S-36MD1E5 S-45MD1E5 S-56MD1E5

2-Way Cassette S-22ML1E5

S-28ML1E5 S-36ML1E5 S-45ML1E5 S-56ML1E5

4-Way Cassette S-22MU1E5

S-28MU1E5 S-36MU1E5 S-45MU1E5 S-56MU1E5

4-Way Cassette 60 × 60 S-22MY1E5

S-28MY1E5 S-36MY1E5 S-45MY1E5 S-56MY1E5

Wall-Mounted S-22MK1E5

S-28MK1E5 S-36MK1E5 S-45MK1E5 S-56MK1E5

Ceiling

S-36MT1E5 S-45MT1E5 S-56MT1E5

Low Silhouette Ducted S-22MF1E5

S-28MF1E5 S-36MF1E5 S-45MF1E5 S-56MF1E5

Slim Low Static Ducted S-22MM1E5

S-28MM1E5 S-36MM1E5 S-45MM1E5 S-56MM1E5

High Static Pressure Ducted

Floor Standing S-22MP1E5

S-28MP1E5 S-36MP1E5 S-45MP1E5 S-56MP1E5

Concealed Floor Standing S-22MR1E5

S-28MR1E5 S-36MR1E5 S-45MR1E5 S-56MR1E5

Indoor Unit Type 73 90 106 140 160

D1 1-Way Cassette S-73MD1E5

2-Way Cassette

S-73ML1E5

4-Way Cassette

S-73MU1E5 S-106MU1E5 S-140MU1E5 S-160MU1E5

4-Way Cassette 60 × 60

Wall-Mounted

S-73MK1E5 S-106MK1E5

Ceiling

S-73MT1E5 S-106MT1E5 S-140MT1E5

Low Silhouette Ducted

S-73MF1E5 S-90MF1E5 S-106MF1E5 S-140MF1E5 S-160MF1E5

Slim Low Static Ducted

High Static Pressure Ducted

S-73ME1E5 S-106ME1E5 S-140ME1E5

Floor Standing

S-71MP1E5

Concealed Floor Standing

S-71MR1E5

for Refrigerant R410A

INSTALLATION INSTRUCTIONS

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IMPORTANT!

Please Read Before Starting

This air conditioner must be installed by the sales dealer

or installer.

This information is provided for use only by authorized

persons.

For safe installation and trouble-free operation, you must:

●Carefully read this instruction booklet before beginning.

●Follow each installation or repair step exactly as shown.

●This air conditioner shall be installed in accordance with

National Wiring Regulations.

●This product is intended for professional use.

Permission from the power supplier is required when

installing the U-4LE1E8, U-5LE1E8, U-6LE1E8,

outdoor units that are connected to a 16 A distribution

network.

●This equipment complies with EN/IEC 61000-3-12

provided that the short-circuit power Ssc is greater

than or equal to the following table at the interface point

between the user’s supply and the public system.

It is the responsibility of the installer or user of

the equipment to ensure, by consultation with the

distribution network operator if necessary, that the

equipment is connected only to a supply with a short-

circuit power Ssc greater than or equal to the value in

the table.

U-4LE1E5 U-5LE1E5 U-6LE1E5

Ssc 350 kVA 400 kVA 550 kVA

●This equipment complies with EN/IEC 61000-3-11

provided that the system impedance Zmax is less than

or equal to the values corresponding to each model as

shown in the table below at the interface point between

the user’s supply and the public system. Consult with

the supply authority for the system impedance Zmax.

U-4LE1E5 U-5LE1E5 U-6LE1E5

Zmax 0.298 :0.298 :0.298 :

●Pay close attention to all warning and caution notices

given in this manual.

WARNING

This symbol refers to a hazard or unsafe

practice which can result in severe

personal injury or death.

CAUTION

This symbol refers to a hazard or unsafe

practice which can result in personal injury

or product or property damage.

If Necessary, Get Help

These instructions are all you need for most installation

sites and maintenance conditions. If you require help for a

special problem, contact our sales/service outlet or your

certified dealer for additional instructions.

In Case of Improper Installation

The manufacturer shall in no way be responsible for

improper installation or maintenance service, including

failure to follow the instructions in this document.

SPECIAL PRECAUTIONS

WARNING When Wiring

ELECTRICAL SHOCK CAN CAUSE

SEVERE PERSONAL INJURY OR DEATH.

ONLY A QUALIFIED, EXPERIENCED

ELECTRICIAN SHOULD ATTEMPT TO

WIRE THIS SYSTEM.

• Do not supply power to the unit until all wiring and tubing

are completed or reconnected and checked.

• Highly dangerous electrical voltages are used in this

system.

Carefully refer to the wiring diagram and these

instructions when wiring. Improper connections and

inadequate grounding can cause accidental injury or

death.

• Connect all wiring tightly. Loose wiring may cause

overheating at connection points and a possible fire

hazard.

•Provide a power outlet to be used exclusively for each

unit.

•ELCB must be incorporated in the fixed wiring.

Circuit breaker must be incorporated in the fixed wiring

in accordance with the wiring regulations.

U-4LE1E5 U-5LE1E5 U-6LE1E5

Circuit breaker 30 A 40 A 40 A

U-4LE1E8 U-5LE1E8 U-6LE1E8

Circuit breaker 20 A 20 A 20 A

•Provide a power outlet exclusively for each unit, and

full disconnection means having a contact separation

in all poles must be incorporated in the fixed wiring in

accordance with the wiring rules.

•To prevent possible hazards from insulation failure,

the unit must be grounded.

When Transporting

Be careful when picking up and moving the indoor and

outdoor units. Get a partner to help, and bend your knees

when lifting to reduce strain on your back. Sharp edges

or thin aluminum fins on the air conditioner can cut your

fingers.

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When Installing…

Select an installation location which is rigid and strong

enough to support or hold the unit, and select a location

for easy maintenance.

…In a Room

Properly insulate any tubing run inside a room to prevent

“sweating” that can cause dripping and water damage to

walls and floors.

CAUTION

Keep the fire alarm and the air outlet at least

1.5 m away from the unit.

…In Moist or Uneven Locations

Use a raised concrete pad or concrete blocks to provide

a solid, level foundation for the outdoor unit. This

prevents water damage and abnormal vibration.

…In an Area with High Winds

Securely anchor the outdoor unit down with bolts and a

metal frame. Provide a suitable air baffle.

…In a Snowy Area (for Heat Pump-type Systems)

Install the outdoor unit on a raised platform that is higher

than drifting snow. Provide snow vents.

When Connecting Refrigerant Tubing

WARNING

•

When performing piping work do not

mix air except for specifIed refrigerant

(R410A) in refrigeration cycle. It

causes capacity down, and risk of

explosion and injury due to high

tension inside the refrigerant cycle.

• Refrigerant gas leakage may cause

fire.

• Do not add or replace refrigerant

other than specified type. It may

cause product damage, burst and

injury, etc.

• Ventilate the room well, in the event that is refrigerant

gas leaks during the installation. Be careful not to allow

contact of the refrigerant gas with a flame as this will

cause the generation of poisonous gas.

• Keep all tubing runs as short as possible.

• Use the flare method for connecting tubing.

• Apply refrigerant lubricant to the matching surfaces of

the flare and union tubes before connecting them, then

tighten the nut with a torque wrench for a leak-free

connection.

• Check carefully for leaks before starting the test run.

• Do not leak refrigerant while piping work for an

installation or re-installation, and while repairing

refrigeration parts.

Handle liquid refrigerant carefully as it may cause

frostbite.

When Servicing

• Turn the power OFF at the main power box

(mains) before opening the unit to check or repair

electrical parts and wiring.

• Keep your fingers and clothing away from any moving

parts.

• Clean up the site after you finish, remembering to

check that no metal scraps or bits of wiring have been

left inside the unit being serviced.

WARNING

• Do not clean inside the indoor and

outdoor units by users. Engage

authorized dealer or specialist for

cleaning.

• In case of malfunction of this

appliance, do not repair by yourself.

Contact the sales dealer or service

dealer for repair.

CAUTION

• Do not touch the air inlet or the

sharp aluminum fins of the

outdoor unit.You may get injured.

•

Ventilate any enclosed areas when

installing or testing the refrigeration

system. Escaped refrigerant gas, on

contact with fire or heat, can produce

dangerously toxic gas.

•

Confirm after installation that no

refrigerant gas is leaking. If the gas

comes in contact with a burning stove,

gas water heater, electric room heater

or other heat source, it can cause the

generation of poisonous gas.

Others

CAUTION

• Do not touch the air inlet or

the sharp aluminum fins of the

outdoor unit.You may get injured.

• Do not sit or step on the unit,

you may fall down accidentally.

• Do not stick any object into

the FAN CASE.

You may be injured and the

unit may be damaged.

NOTICE

The English text is the original instructions. Other

languages are translations of the original instructions.

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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).

(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 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.

3. The minimum indoor floor space compared with the

amount of refrigerant is roughly as follows: (When the

ceiling is 2.7 m high)

40.5

54.0

27.0

13.5

0.0 20100 3040 6070809010050

67.5

81.0

94.5

108.0

121.5

135.0

148.5

162.0

175.5

189.0

202.5

216.0

229.5

243.0

256.0

270.0

m2m3

100

105

110

115

120

125

283.5

297.0

310.5

324.0

337.5

Check of Density 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 density will not exceed a set limit.

The refrigerant (R410A), which is used in the air conditioner,

is safe, without the toxicity or combustibility of ammonia, and

is not restricted by laws imposed to protect the ozone layer.

However, since it contains more than air, it poses the risk of

suffocation if its density should rise excessively. Suffocation

from leakage of refrigerant is almost non-existent. With the

recent increase in the number of high density 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 to

conventional individual air conditioners. If a single unit of the

multi air 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 density 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 density may exceed the limit, create an

opening with adjacent rooms, or install mechanical ventilation

combined with a gas leak detection device. The density is as

given below.

Total amount of refrigerant (kg)

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

< Density limit (kg/m3)

The density limit of refrigerant which is used in multi air

conditioners is 0.3 kg/m3(ISO 5149).

NOTE

1. If there are 2 or more refrigerating systems in a single

refrigerating device, the amount of refrigerant should be as

charged in each independent device.

For the amount of charge in this example:

The possible amount of leaked refrigerant gas in rooms A,

B and C is 10 kg.

The possible amount of leaked refrigerant gas in rooms D,

E and F is 15 kg.

e.g., charged

amount (10 kg)

Indoor unit

Outdoor unit

e.g., charged

amount (15 kg)

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

Outdoor unit

Refrigerant tubing

Indoor unit

Mechanical ventilation device – Gas leak detector

Refrigerant tubing

Outdoor unit

Indoor unit

Very

small

room

Small

room Medium

room

Large room

Range below the

density limit of

0.3 kg/m³

(Countermeasures

not needed)

Range above the

density limit of

0.3 kg/m³

(Countermeasures

needed)

Total amount of refrigerant

Min. indoor volume

Min. indoor floor area

(when the ceiling is 2.7 m high)

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Precautions for Installation Using New

Refrigerant

1. Care regarding tubing

1-1. Process tubing

●Material: Use C1220 phosphorous deoxidized copper

specified in JIS H3300 “Copper and Copper Alloy Seamless

Pipes and Tubes”.

●Tubing size: Be sure to use the sizes indicated in the

table below.

●Use a tube cutter when cutting the tubing, and be sure to

remove any flash. This also applies to distribution joints

(optional).

●When bending tubing, use a bending radius that is 4 times

the outer diameter of the tubing or larger.

CAUTION

Use sufficient care in handling the tubing. Seal the tubing ends

with caps or tape to prevent dirt, moisture, or other foreign

substances from entering. These substances can result in

system malfunction.

Unit: mm

Material O

Copper

tube

Outer diameter 6.35 9.52 12.7 15.88 19.05

Wall thickness 0.8 0.8 0.8 1.0 1.2

1-2. Prevent impurities including water, dust and oxide from

entering the tubing. Impurities can cause R410A refrigerant

deterioration and compressor defects. Due to the features

of the refrigerant and refrigerating machine oil, the

prevention of water and other impurities becomes more

important than ever.

2. Be sure to recharge the refrigerant only in liquid form.

2-1. Since R410A is a non-azeotrope, recharging the refrigerant

in gas form can lower performance and cause defects of

the unit.

2-2. Since refrigerant composition changes and performance

decreases when gas leaks, collect the remaining

refrigerant and recharge the required total amount of new

refrigerant after fixing the leak.

3. Different tools required

3-1. Tool specifications have been changed due to the

characteristics of R410A.

Some tools for R22- and R407C-type refrigerant systems

cannot be used.

Item New

tool?

R407C

tools

compatible

with

R410A?

Remarks

Manifold

gauge

Yes No Types of refrigerant,

refrigerating machine oil,

and pressure gauge are

different.

Charge

hose

Yes No To resist higher pressure,

material must be changed.

Vacuum

pump

Yes Yes Use a conventional vacuum

pump if it is equipped with

a check valve. If it has no

check valve, purchase and

attach a vacuum pump

adapter.

Leak

detector

Yes No Leak detectors for CFC

and HCFC that react to

chlorine do not function

because R410A contains

no chlorine. Leak detectors

for HFC134a can be used

for R410A.

Flaring oil Yes No For systems that use R22,

apply mineral oil (Suniso

oil) to the flare nuts on the

tubing to prevent refrigerant

leakage. For machines

that use R407C or R410A,

apply synthetic oil (ether

oil) to the flare nuts.

* Using tools for R22 and R407C and new tools for R410A

together can cause defects.

3-2. Use R410A exclusive cylinder only.

Single-outlet valve

(with siphon tube)

Liquid refrigerant should be

recharged with the cylinder

standing on end as shown.

Manifold gauge Vacuum pump

Outlet

Inlet

Valve

Liquid

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IMPORTANT! . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Please Read Before Starting

Check of Density Limit

Precautions for Installation Using New Refrigerant

1. GENERAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1-1. Tools Required for Installation (not supplied)

1-2. Accessories Supplied with Outdoor Unit

1-3. Type of Copper Tube and Insulation Material

1-4. Additional Materials Required for Installation

1-5. Tubing Size

1-6. Straight Equivalent Length of Joints

1-7. Additional Refrigerant Charge

1-8. System Limitations

1-9. Tubing Length

1-10. Check of Limit Density

1-11. Installing Distribution Joint

1-12. Optional Distribution Joint Kit

1-13. Example of Tubing Size Selection and Refrigerant

Charge Amount

2. SELECTING THE INSTALLATION SITE . . . . . . . . . . . . . 11

2-1. Outdoor Unit

2-2. Air-Discharge Chamber for Top Discharge

2-3. Installing the Unit in Heavy Snow Areas

2-4. Precautions for Installation in Heavy Snow Areas

2-5. Dimensions of Air-Discharge Chamber

2-6. Dimensions of Snow-Proof Vents

3. HOW TO INSTALL THE OUTDOOR UNIT . . . . . . . . . . . . 16

3-1. Installing the Outdoor Unit

3-2. Drainage Work

3-3. Routing the Tubing and Wiring

4. ELECTRICAL WIRING . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

4-1. General Precautions on Wiring

4-2. Recommended Wire Length and Wire Diameter for

Power Supply System

4-3. Wiring System Diagrams

5. HOW TO PROCESS TUBING . . . . . . . . . . . . . . . . . . . . . 20

5-1. Connecting the Refrigerant Tubing

5-2. Connecting Tubing Between Indoor and Outdoor

Units

5-3. Insulating the Refrigerant Tubing

5-4. Taping the Tubes

5-5. Finishing the Installation

6. AIR PURGING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

■Air Purging with a Vacuum Pump (for Test Run) Preparation

7. TEST RUN. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

7-1. Preparing for Test Run

7-2. Test Run Procedure

7-3. Outdoor Unit PCB Setting

7-4. Auto Address Setting

7-5. Caution for Pump Down

7-6. Meaning of Alarm Messages

8. MARKINGS FOR DIRECTIVE 97/23/EC (PED) . . . . . . . . 33

CONTENTS

Page Page

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1. GENERAL

This booklet briefly outlines where and how to install the

air conditioning system. Please read over the entire set of

instructions for the indoor and outdoor units and make sure all

accessory parts listed are with the system before beginning.

1-1. Tools Required for Installation (not supplied)

1. Flathead screwdriver

2. Phillips head screwdriver

3. Knife or wire stripper

4. Tape measure

5. Carpenter’s level

6. Sabre saw or key hole saw

7. Hacksaw

8. Core bits

9. Hammer

10. Drill

11. Tube cutter

12. Tube flaring tool

13. Torque wrench

14. Adjustable wrench

15. Reamer (for deburring)

16. Hexagonal wrench (4 mm and 5 mm)

17. Pliers

18. Cutting pliers

1-2. Accessories Supplied with Outdoor Unit

Table 1-1 (Outdoor Unit)

Part

name Figure

Q’ty

U-4LE1E5

U-4LE1E8

(4 hp)

U-5LE1E5

U-5LE1E8

(5 hp)

U-6LE1E5

U-6LE1E8

(6 hp)

Tube

Discharge

Assy

001

Plastic bar

(L=115 mm)

222

Instruction

manual paper

111

hp = horsepower

1-3. Type of Copper Tube and Insulation Material

If you wish to purchase these materials separately from a local

source, you will need:

1. Deoxidized annealed copper tube for refrigerant tubing.

2. Foamed polyethylene insulation for copper tubes as

required to precise length of tubing. Wall thickness of the

insulation should be not less than 8 mm.

3. Use insulated copper wire for field wiring. Wire size varies

with the total length of wiring. Refer to 4. ELECTRICAL

WIRING for details.

CAUTION

Check local electrical codes and regulations before

obtaining wire. Also, check any specified instructions or

limitations.

1-4. Additional Materials Required for Installation

1. Refrigeration (armored) tape

2. Insulated staples or clamps for connecting wire (See your

local codes.)

3. Putty

4. Refrigeration tubing lubricant

5. Clamps or saddles to secure refrigerant tubing

6. Scale for weighing

1-5. Tubing Size

Table 1-2 Main Tubing Size (LA)

4 hp 5 hp 6 hp

System

horsepower 456

Gas tubing (mm) ø15.88 ø19.05

Liquid tubing (mm) ø9.52

Unit: mm, hp = horsepower

Note : If the system consists of only one indoor unit with an

outdoor 6HP, the main tube of the unit (LA) should be

ø19.05. Convert ø19.05 to ø15.88 using a reducer

(field supply) close to the indoor unit and then make the

connection.

Table 1-3 Main Tubing Size After Distribution (LB, LC...)

Total

capacity after

distribution

Below kW 7.1

(2.5 hp) 12.1

(4 hp) 14.0

(5 hp) 15.5

(6 hp)

Over kW – 7.1(2.5 hp)

Tubing size

Gas tubing

(mm) ø12.7 ø15.88 ø19.05

Liquid

tubing (mm) ø9.52 ø9.52

Unit: mm, hp = horsepower

Note : In case the total capacity of connected indoor units

exceeds the total capacity of the outdoor units, select the

main tubing size for the total capacity of the outdoor units.

Table 1-4 Indoor Unit Tubing Connection ( 1, 2... n–1)

Indoor unite type

22 28 36 45 56 73 90 106 140 160

Gas tubing (mm) ø12.7 ø15.88

Liquid tubing (mm)

ø6.35 ø9.52

Unit: mm

1-6. Straight Equivalent Length of Joints

Design the tubing system by referring to the following table for

the straight equivalent length of joints.

Table 1-5 Straight Equivalent Length of Joints

Gas tubing size (mm) 12.7 15.88 19.05

90° elbow 0.30 0.35 0.42

45° elbow 0.23 0.26 0.32

U-shape tube bend

(R60 − 100 mm) 0.90 1.05 1.26

Trap bend 2.30 2.80 3.20

Y-branch distribution

joint Equivalent length conversion

not needed.

Ball value for service Equivalent length conversion

not needed.

Table 1-6 Required Copper Tubing Dimensions Unit: mm

Material O

Copper

tubing

Outer

diameter 6.35 9.52 12.7 15.88 19.05

Wall

thickness 0.8 0.8 0.8 1.0 1.2

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1-7. Additional Refrigerant Charge

Additional refrigerant charge amount is calculated from the

liquid tubing total length as follows.

Table 1-7 Amount of Refrigerant Charge Per Meter,

According to Liquid Tubing Size

Liquid tubing size Amount of refrigerant

charge/m (g/m)

ø6.35 26

ø9.52 56

Required amount of charge

(Amount of refrigerant charge per meter of each size of liquid tube

× its tube length) + (...) + (...)

* Always charge accurately using a scale for weighing.

Table 1-8 Refrigerant Charge Amount at Shipment (for

outdoor unit)

4 hp 5 hp 6 hp

3.5 3.5 3.5

Unit: kg, hp = horsepower

1-8. System Limitations

Table 1-9 System Limitations

Outdoor units 4 hp 5 hp 6 hp

Number of max.

connectable indoor units 689

Max. allowable indoor/

outdoor capacity ratio 50 – 130%

hp = horsepower

1-9. Tubing Length

Select the installation location so that the length and size of

refrigerant tubing are within the allowable range shown in the

figure below.

LA L1

L2 LDLCLB

123n-1

Note: Do not use commercially available T-joints for the liquid tubing.

* Be sure to use special R410A

distribution joints (CZ-P160BK2 :

purchased separately) for outdoor

unit connections and tubing

branches.

R410A distribution joint

CZ-P160BK2 (for indoor unit)

Table 1-10 Ranges that Apply to Refrigerant Tubing Lengths

and to Differences in Installation Heights

Items Marks Contents Length (m)

Allowable

tubing

length

L1 Max. tubing

length

Actual

length d120

Equivalent

length d140

'L (L2 – L3)

Difference between max.

length and min. length

from the No.1 distribution

joint

d40

1, 2... n

Max. length of each

distribution tube d30

1, 2... n-1+L1

Total max. tubing length

including length of each

distribution tube (only

narrow tubing)

d150

Allowable

elevation

difference

When outdoor unit is

installed higher than

indoor unit

d50

When outdoor unit is

installed lower than

indoor unit

d40

H2 Max. difference between

indoor units d15

L = Length, H = Height

WARNING

Always check the gas density limit for the room in which the

unit is installed.

1-10. Check of Limit Density

When installing an air conditioner in a room, it is necessary to

ensure that even if the refrigerant gas accidentally leaks out, its

density does not exceed the limit level for that room.

If the density could exceed the limit level, it is necessary to

provide an opening between the unit and the adjacent room,

or to install mechanical ventilation which is interlocked with the

leak detector.

(Total refrigerant charged amount: kg)

(Min. indoor volume where indoor unit is installed: m3)

dLimit density 0.3 (kg/m3)

The limit density of refrigerant which is used in this unit is

0.3 kg/m3(ISO 5149).

The shipped outdoor unit comes charged with the amount of

refrigerant fixed for each type, so add it to the amount that

is charged at the field. (For the refrigerant charge amount at

shipment, refer to the unit’s nameplate.)

Main tube

of unit

1st branch

Unit distribution tube

Less than

400 mm

For

extension

Distribution joint (CZ-P160BK2)

Ball valve (field supply)

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Minimum indoor volume & floor area relative to the amount of

refrigerant are roughly as given in the following table.

Min. indoor floor area

(when the ceiling is 2.7 m high)

40.5

54.0

27.0

13.5

0.0 20100 30 40 60 70 80 90 10050

67.5

81.0

94.5

108.0

121.5

135.0

148.5

162.0

175.5

189.0

202.5

216.0

229.5

243.0

256.0

270.0

m2m3

100

105

110

115

120

125

283.5

297.0

310.5

324.0

337.5

Min. indoor volume

Total amount of refrigerant

CAUTION

Pay special attention to any location, such as a basement,

etc. where leaking refrigerant can accumlate, since

refrigerant gas is heavier than air.

1-11. Installing Distribution Joint

(1) Refer to “HOW TO ATTACH DISTRIBUTION JOINT”

enclosed with the optional distribution joint kit

(CZ-P160BK2).

(2) In order to prevent accumulation of refrigerant oil in

stopped units, if the main tubing is horizontal then each

branch tubing length should be at an angle that is greater

than horizontal. If the main tubing is vertical, provide a

raised starting portion for each branch.

(3) If there are height differences between indoor units or if

branch tubing that follows a distribution joint is connected

to only 1 unit, a trap or ball valve (field supply) must be

added to that distribution joint. (When adding the ball

valve, locate it within 40 cm of the distribution joint.)

If a trap or ball valve (field supply) is not added, do not

operate the system before repairs to a malfunctioning unit

are completed. (The refrigerant oil sent through the tubing to

the malfunctioning unit will accumulate and may damage the

compressor.)

15 to 30º

Horizontal

line View as seen from

arrow

Arrow view

Tube branching methods (horizontal use)

Types of vertical trap specifications

(When using ball valve (field supply))

Indoor unit (more than 2 units)

(If only 1 unit is connected, a ball

valve is also needed on this side.)

Ball valve

(BV: field supply)

Indoor unit (1)

(When not using ball valve)

Main tubing

Horizontal

Indoor unit (Each unit is

connected to

tubing that is either

level or is directed

downward.)

Branch tubing is

directed upward.

Indoor unit is directed downward

Main tubing

More than

20 cm

1-12. Optional Distribution Joint Kit

See the installation instructions packaged with the distribution

joint kit for the installation procedure.

Table 1-11

Model name Cooling capacity

after distribution Remarks

CZ-P160BK2 22.4 kW or less For indoor unit

CZ-P160BK2

Use: For indoor unit (Capacity after distribution joint is 22.4 kW or less.)

110

Table 1-12 Size of connection point on each part

(shown are inside diameters of tubing)

Size Part A Part B Part C Part D Part E

mm ø19.05 ø15.88 ø12.7 ø9.52 ø6.35

Unit: mm

Example Gas tube Liquid tube

Distribution joint

Insulation

Distribution

joint

Insulation

Range above the

density limit of 0.3 kg/m³

(Countermeasures needed)

Range below the

density limit of 0.3 kg/m³

(Countermeasures not

needed)

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1-13. Example of Tubing Size Selection and

Refrigerant Charge Amount

Additional refrigerant charging

Based on the values in Tables 1-2, 1-3, 1-4 and 1-7, use the

liquid tubing size and length, and calculate the amount of

additional refrigerant charge using the formula below.

(a): Liquid tubing Total length of ø9.52 (m)

(b): Liquid tubing Total length of ø6.35 (m)

●Charging procedure

Be sure to charge with R410A refrigerant in liquid form

After performing a vacuum, charge with refrigerant from

the liquid tubing side. At this time, all valves must be in the

“fully closed” position.

If it was not possible to charge the designated amount,

operate the system in Cooling mode while charging with

refrigerant from the gas tubing side. (This is performed at

the time of the test run. For this, all valves must be in the

“fully open” position.)

Charge with R410A refrigerant in liquid form.

With R410A refrigerant, charge while adjusting the

amount being fed a little at a time in order to prevent liquid

refrigerant from backing up.

●After charging is completed, turn all valves to the “fully open”

position.

●Replace the tubing covers as they were before.

CAUTION

R410A additional charging absolutely must be done

through liquid charging.

The R410A refrigerant cylinder has a gray base color,

and the top part is pink.

The R410A refrigerant cylinder includes a siphon tube.

Check that the siphon tube is present. (This is indicated

on the label at the top of the cylinder.)

Due to differences in the refrigerant, pressure, and

refrigerant oil involved in installation, it is not possible in

some cases to use the same tools for R22 and for R410A.

Required additional

refrigerant charge (kg) = [56 × (a) + 26 × (b)] × 10 –3

Example:

LCLB n

n–1

●Example of each tubing length

Main tubing Distribution joint tubing

LA = 40 m Indoor side

LB = 5 m 1 = 5 m 4 = 6 m

LC = 5 m 2 = 5 m 5 = 5 m

LD = 15 m 3 = 2 m

●Obtain charge amount for each tubing size

Note that the charge amounts per 1 meter are different for

each liquid tubing size.

ø9.52 oLA + LB + LC + LD : 65 m × 0.056 kg/m = 3.64 kg

ø6.35 o 1+ 2+ 3+ 4+ 5 : 23 m × 0.026 kg/m = 0.598 kg

Total 4.238 kg

Additional refrigerant charge amount is 4.238 kg.

CAUTION

Be sure to check the limit density for the room in which the

indoor unit is installed.

Tightening torque for

valve stem cap:

20.6 – 28.4 N·m

Tightening torque:

34 – 42 N·m

Tightening torque for valve

stem cap: 48 – 59.8 N·m Tightening torque:

68 – 82 N·m

Main tube

of unit

1st branch

Unit distribution

tube type

type

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Checking of limit density

Density limit is determined on the basis of the size of a room

using an indoor unit of minimum capacity. For instance, when

an indoor unit is used in a room (floor area 7.43 m2 × ceiling

height 2.7 m = room volume 20.06 m3), the minimum room

volume should be 25.8 m3(7.738 kg ÷ 0.3 kg/m3) for refrigerant

of 7.738 kg (3.5 kg + 4.238 kg). Accordingly, openings such as

louvers are required for this room.

Overall refrigerant charge amount for the air conditioner: kg

(Minimum room volume for indoor unit: m3)

=4.238 (kg) + 3.5 (kg) = 0.39 (kg/m3) 0.3 (kg/m3)

20.06 (m3)

Therefore, openings such as louvers are required for this room.

Min. indoor floor area

(when the ceiling is 2.7 m high)

40.5

54.0

27.0

13.5

0.0 20100 3040 6070809010050

67.5

81.0

94.5

108.0

121.5

135.0

148.5

162.0

175.5

189.0

202.5

216.0

229.5

243.0

256.0

270.0

m2m3

100

105

110

115

120

125

283.5

297.0

310.5

324.0

337.5

Min. indoor volume

Total amount of refrigerant

2. SELECTING THE INSTALLATION SITE

2-1. Outdoor Unit

AVOID:

●heat sources, exhaust fans, etc. (Fig. 2-1)

●damp, humid or uneven locations

●indoors (no-ventilation location)

DO:

●choose a place as cool as possible.

●choose a place that is well ventilated and outside air

temperature does not exceed maximum 45°C constantly.

●allow enough room around the unit for air intake/

exhaust and possible maintenance. (Figs. 2-2, 2-3, 2-4)

●use lug bolts or equal to bolt down unit, reducing vibration

and noise.

Fig. 2-1

Installation space for outdoor unit

Install the outdoor unit with a sufficient space around the

outdoor unit for operation and maintenance.

(1) Obstructions on the left side, right side and rear side (Front

side and above the unit are opened). (Fig. 2-2)

Fig. 2-2

The outdoor units require necessary space to unscrew on

the rear side for maintenance and if a sufficient maintenance

space is provided on the rear side (40 cm), the space of over

15 cm is enough at the right side.

(2) Obstructions on the front side and rear side (Left side, right

side and above the unit are opened). (Fig. 2-3)

*A B

Fig. 2-3

* For compressor replacement, 50 cm or more is required on

the front side even when using the air discharge chamber.

(3) Obstructions on the front side and above the unit (Left

side, right side and rear side are opened). (Fig. 2-4)

Fig. 2-4

Exhaust fan

Heat source

Hot air

Out-

door

unit

A*BC

15 cm

or more 25 cm

or more 20 cm

or more

*A B

50 cm

or more 15 cm

or more

50 cm

or more 30 cm

or more

Range above the

density limit of 0.3 kg/m³

(Countermeasures needed)

Range below the

density limit of 0.3 kg/m³

(Countermeasures not

needed)

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In case of multiple installations

●Provide a solid base (concrete block, 10 × 40 cm beams or

equal), a minimum of 15 cm above ground level to reduce

humidity and protect the unit against possible water damage

and decreased service life. (Fig. 2-5)

●Use lug bolts or equal to bolt down unit, reducing vibration

and noise.

Fig. 2-5

2-2. Air-Discharge Chamber for Top Discharge

Be sure to install an air-discharge chamber in the field when:

●it is difficult to keep a space of min. 50 cm between the air

discharge outlet and an obstacle.

●the air discharge outlet is facing a sidewalk and discharged

hot air may annoy passers-by. Refer to Fig. 2-6.

Fig. 2-6

Air intake Air intake

Air discharge

(4 pieces)

Anchor bolts

Min. 15cm

Air discharge

In regions with significant snowfall, the outdoor unit

should be provided with a platform and snow-proof duct.

2-3. Installing the Unit in Heavy Snow Areas

In locations with strong wind, snow-proof ducting should be

fitted and direct exposure to the wind should be avoided as

much as possible.

■Countermeasures against snow and wind

In regions with snow and strong wind, the following problems

may occur when the outdoor unit is not provided with a platform

and snow-proof ducting:

a) The outdoor fan may not run and damage to the unit may

occur.

b) There may be no air flow.

c) The tubing may freeze and burst.

d) The condenser pressure may drop because of strong wind,

and the indoor unit may freeze.

2-4. Precautions for Installation in Heavy Snow Areas

(1) The platform should be higher than the max. snow depth.

(Fig. 2-7)

Fig. 2-7

(2) The 2 anchoring feet of the outdoor unit should be used for

the platform, and the platform should be installed beneath

the air intake side of outdoor unit.

(3) The platform foundation must be firm and the unit must be

secured with anchor bolts.

(4) In case of installation on a roof subject to strong wind,

countermeasures must be taken to prevent the unit from

being blown over.

166

308

Fig. 2-8

Without snow-

proof ducting

(Low platform)

With snow-

proof ducting

(High platform)

Min. 100

Outdoor

Unit

Duct Duct

Higher than the

maximum snow depth

Air intake

Platform (foundation)

About 1/2 of the unit height

Air intake

Duct

Outdoor Unit

Unit: mm

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(1) Single-unit installation

Unit: mm

(2) Multiple-unit installation

Installation in lateral rows

Unit: mm

NOTE

●The amount of space is required for removing the screws

on the rear of the unit. If in case the sufﬁcient space for

maintenance is ensured on the rear of the outdoor unit,

installation is possible with the space of both sides of not less

than 150mm where marked with * mark.

CAUTION

2-5. Dimensions of Air-Discharge Chamber

Reference diagram for air-discharge chamber (field supply)

Unit: mm

1330

940

56 (316)568

660 (110)

170

340 2020

380 1020

(88) 555 566

643

217

(303) 340

Required space around outdoor unit

If the air discharge chamber is used, the space shown below must be secured around the outdoor unit.

If the unit is used without the required space, a protective device may activate, preventing the unit from operating.

Air Intake

Installation anchoring holes (4-R6.5) / Anchor bolt M10

Air Intake

Air

discharge

Air

discharge

The top and both sides must remain open.

If there are obstacles to the front and rear of

the outdoor unit, the obstacle at either the

front or rear must be no taller than the height

of the outdoor unit.

Installation in front-rear rows

Installation with intakes facing

intakes or outlets facing outlets

Unit: mm

The front and both sides must remain open.

CAUTION

The front and top must remain open.

The obstacles must be no taller than the height

of the outdoor unit.

Min. 300 or more

Min. 1000 or more

CAUTION

Not less than 150* or more

Min. 250

or more

Min. 200

or more

Min. 250

or more

Min. 500

or more

Min. 150

or more

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2-6. Dimensions of Snow-Proof Vents

Reference diagram for snow-proof vents (field supply)

Unit: mm

997

691

1333

1209

(124)

733

645

340 (303)

(295)

702

380

660227

1020

2020 340

Required space around outdoor unit

[Obstacle to the rear of unit]

● Top is open:

Air Intake

Mounting hole

Air discharge

Air Intake

(2-13 u18 hole)

(1) Single-unit installation (2) Obstacles on both sides

(3) Multiple-unit installation (2 or more units)

Min. A

or more

Min. D

or more

Min. B

or more Min. C

or more

Min. E

or more Min. E

or more

Min. F

or more

Min. G

or more

Unit: mm

ABCDEFG

150 150 250* 200 250 150 200

Notes:

1. In cases 2 and 3 the height of the obstacle must be no taller

than the height of the outdoor unit.

2. The amount of space is required for removing the screw on the

rear of the unit. If in case the sufficient space for maintenance

is ensured on the rear of the outdoor unit, installation is

possible with the space of both sides of not less than 150mm

where marked with * mark.

500 150

● Top is blocked by an obstacle:

Min. L

or more

Unit: mm

Min. K

or more

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(1) Single-unit installation

(2) Multiple-unit installation (2 or more units)

Min. J

or more

Min. I

or more

Note: The amount of space is required for removing the screws

on the rear of the unit.

If in case the sufficient space for maintenance is ensured

on the rear of the outdoor unit, installation is possible

with the space of both sides of not less than 150mm

where marked with * mark.

● Top is open:

Min. I

or more

[Obstacle to the front and rear of unit]

●The top and both sides must remain open. Either the obstacle to the front or the obstacle to the rear must be no taller

than the height of the outdoor unit.

(1) Single-unit installation

500 150

Unit: mm

Min. O

or more Min. P

or more

Dimension Q

If a snow protection duct is attached after the unit is

installed, verify that dimension Q is 500 mm or more.

(2) Obstacles on both sides

Installation is possible with the maximum 3 outdoor units.

Unit: mm

Min. 250*

or more Min. 250*

or more

Min.1000

or more

Min.300

or more

Note:

The amount of space is required for removing the screws on the rear

of the unit. If in case the sufficient space for maintenance is ensured

on the rear of the outdoor unit, installation is possible with the space

of both sides of not less than 150mm where marked with * mark.

[Installation in front-rear rows]

●The top and both sides must remain open.

Either the obstacle to the front or the obstacle to

the rear must be no taller than the height of the

outdoor unit.

Min. 300 or more

Min. 1500 or more

Unit: mm

Min. H

or more

Unit: mm

HI J

500 250* 1000

[Obstacle to the front of unit]

500 300

Unit: mm

● Top is blocked by an obstacle:

Min. M

or more

Min. N

or more

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3. HOW TO INSTALL THE OUTDOOR UNIT

3-1. Installing the Outdoor Unit

●Use concrete or a similar material to create the base, and

ensure good drainage.

●Ordinarily, ensure a base height of 5 cm or more. If a drain

pipe is used, or for use in cold-weather regions, ensure a

height of 15 cm or more at the feet on both sides of the unit.

(In this case, leave clearance below the unit for the drain

pipe, and to prevent freezing of drainage water in cold-

weather regions.)

●Refer to Fig. 3-1 for the anchor bolt dimensions.

●Be sure to anchor the feet with anchor bolts (M10). In

addition, use anchoring washers on the top side. (Use large

square 32 × 32 SUS washers with JIS nominal diameter of

10.) (Field supply)

380

20 (10)

410

340

1330 290 26

105 219 7575 50

170 660

940

110

Anchor bolt (M10)

4- ø13 Anchor bolt hole

4- ø32

Drain port (2 locations)

Drain port

Fig. 3-1

3-2. Drainage Work

Follow the procedure below to ensure adequate draining for the

outdoor unit.

●For the drain port dimensions, refer to Fig. 3-1.

●Ensure a base height of 15 cm or more at the feet on both

sides of the unit.

●When using a drain pipe, install the drain socket (field

supply) onto the drain port. Seal the other drain port with the

rubber cap supplied with the drain socket.

●For details, refer to the instruction manual of the drain socket

(field supply).

●After completing the installation work of the drain socket,

make sure that the water does not leak from any part of

connection.

3-3. Routing the Tubing and Wiring

●The tubing and wiring can be extended out in 4 directions

(front, rear, right, and down):

●The service valves are housed inside the unit. To access

them, remove the inspection panel. (To remove the

inspection panel, remove the 3 screws, then slide the panel

downward and pull it toward you.)

(1) If the routing direction is through the front, rear, or right,

use a nipper or similar tool to cut out the knockout holes for

the inter-unit control wiring outlet, power wiring outlet, and

tubing outlet from the appropriate covers A and B.

When routing the wiring, be sure to attach each supplied

plastic bar to the edges around the wiring outlet holes in

order to protect the wiring from scratches by the cutting

burr.

(2) If the routing direction is down, use a nipper or similar tool

to cut out the lower flange from cover A.

Inspection panel

Inter-unit control wiring outlet*

Cover A

Power wiring outlet*Tubing outlet

Front Right

Cover B

Rear

Down

Fig. 3-2

NOTE

When not using a conduit material or existing materials,

measure and cut the supplied plastic bar according to the size

of the wiring outlet hole. Then attach the plastic bar to the edges

around the hole. Use sealing putty to seal off the hole to prevent

the dust and insects from entering the wiring outlet holes.

CAUTION

●Route the tubing so that it does not contact the

compressor, panel, or other parts inside the unit.

Increased noise will result if the tubing contacts these

parts.

●When routing the tubing, use a tube bender to bend the

tubes.

4. ELECTRICAL WIRING

4-1. General Precautions on Wiring

(1) Before wiring, confirm the rated voltage of the unit as

shown on its nameplate, then carry out the wiring closely

following the wiring diagram.

(2) Provide a power outlet to be used exclusively for each

unit and a power supply disconnect, circuit breaker and

earth leakage breaker for overcurrent protection should be

provided in the exclusive line.

(3) To prevent possible hazards from insulation failure, the unit

must be grounded.

(4) Each wiring connection must be done in accordance with

the wiring system diagram. Wrong wiring may cause the

unit to disorder or become damaged.

(5) Do not allow wiring to touch the refrigerant tubing,

compressor, or any moving parts of the fan.

(6) Unauthorized changes in the internal wiring can be very

dangerous. The manufacturer will accept no responsibility

for any damage or malfunction that occurs as a result of

such unauthorized changes.

(7) Regulations on wire diameters differ from locality to

locality. For field wiring rules, please refer to your LOCAL

ELECTRICAL CODES before beginning.

You must ensure that installation complies with all relevant

rules and regulations.

Air discharge

Air Intake

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(8) To prevent malfunction of the air conditioner caused by electrical noise, care must be taken when wiring as follows:

●The remote control wiring and the inter-unit control wiring should be wired apart from the inter-unit power wiring.

●Use shielded wires for inter-unit control wiring between units and ground the shield on both sides.

(9) If the power supply cord of this appliance is damaged, it must be replaced by a repair shop appointed by the manufacturer,

because special purpose tools are required.

4-2. Recommended Wire Length and Wire Diameter

for Power Supply System

Outdoor unit (Single-phase)

(A) Power supply Time delay capacity

Wire size Max. length Fuse Circuit

breaker

U-4LE1E5 4 mm221 m 25 A 30 A

U-5LE1E5 6 mm224 m 35 A 40 A

U-6LE1E5 6 mm220 m 35 A 40 A

Outdoor unit (3-phase)

(A) Power supply Time delay capacity

Wire size Max. length Fuse Circuit

breaker

U-4LE1E8 2.5 mm258 m 20 A 20 A

U-5LE1E8 2.5 mm249 m 20 A 20 A

U-6LE1E8 2.5 mm241 m 20 A 20 A

4-3. Wiring System Diagrams

Indoor unit

Type (B) Power supply Time delay fuse or

circuit capacity

2.5 mm2

K1 Max. 150 m 10 – 16 A

D1, L1, U1, Y1, T1, F1, M1,

P1, R1 Max. 130 m 10 – 16 A

E1 (73, 106, 140) Max. 60 m 10 – 16 A

Control wiring

(between outdoor

and indoor units)

control wiring

(D) Remote control

wiring (E) Control wiring for

group control

0.75 mm2(AWG #18)

Use shielded

wiring*10.75 mm2(AWG #18) 0.75 mm2(AWG #18)

Max. 1,000 m Max. 500 m Max. 200 m (Total)

NOTE

*1 With ring-type wire terminal.

NOTE

(1) Refer to Section 4-2. “Recommended Wire Length

and Wire Diameter for Power Supply System” for the

explanation of “A”, “B”, “C”, “D” and “E” in the above

diagrams.

(2) The basic connection diagram of the indoor unit shows

the 7P terminal board, so the terminal boards in your

equipment may differ from the diagram.

(3) Refrigerant Circuit (R.C.) address should be set before

turning the power on.

(4) Regarding the R.C. address setting, refer to Section 7-4.

“Auto Address Setting”. Address setting can be executed

by remote controller automatically.

220 – 240V ~50/60Hz

WHT

BLK

WHT

BLK

WHT

BLK

220 – 240V ~50/60Hz

(No. 1)

(No. 2)

(No. n)

(No. 3)

2L2

LN U1 U2 L2L1 L3 N U1 U2

U1 U2 U1 U2

Power supply

Ground

Group control:

Remote

controller

Remote

controller

Remote

controller

Power supply

Ground

Indoor unit

Ground

Outdoor unit : single-phase model

Power supply

220 – 240 V, single-phase, ~ 50 Hz

Ground

2P terminal board

Power supply Inter-unit

control wiring

Mini VRF System

Ground

In case of 3-phase power supply

Outdoor unit : 3-phase model

Power supply

380 – 415 V, 3-phase, ~ 50 Hz

Ground

Outdoor unit : single-phase model

4P terminal board

Power supply Inter-unit

control wiring

Outdoor unit : 3-phase model

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CAUTION

(1) When linking outdoor units in a network, disconnect the terminal extended from the short plug (CN-TERMINAL, 2P Black,

location: right bottom on the outdoor main control PCB) from all outdoor units except any one of the outdoor units.

(When shipping: In shorted condition)

For a system without link (no connection wiring between outdoor units), do not remove the short plug.

(2) Do not install the inter-unit control wiring in a way that forms a loop. (Fig. 4-1)

Fig. 4-1

(3) Do not install inter-unit control wiring such as star branch wiring. Star branch wiring causes mis-address setting.

Fig. 4-2

(4) If branching the inter-unit control wiring, the number of branch points should be 16 or fewer.

(Branches less than 1 m are not included in the total branch number.) (Fig. 4-3)

Fig. 4-3

(5) Use shielded wires for inter-unit control wiring (c) and

ground the shield on both side, otherwise malfunction

from noise may occur. (Fig. 4-4) Connect wiring as

shown in Section “4-3. Wiring System Diagrams”.

Fig. 4-4

(6) Use the standard power supply cables for Europe

(such as H05RN-F or H07RN-F which conform to

CENELEC (HAR) rating specifications) or use the

cables based on IEC standard. (code designation,

60245 IEC 57, 60245 IEC 66)

WARNING

Loose wiring may cause the terminal to overheat or result

in unit malfunction. A fire hazard may also occur. Therefore,

ensure that all wiring is tightly connected.

When connecting each power wire to the terminal, follow the

instructions on “How to connect wiring to the terminal” and

fasten the wire securely with the fixing screw of the terminal

plate.

Outdoor unit Outdoor unit Outdoor unit

Indoor unit Indoor unit Indoor unit Indoor unitIndoor unit

Prohibited

Outdoor unit Outdoor unit Outdoor unit

Indoor unit Indoor unit Indoor unit Indoor unit

Indoor unit

Branch

Point

16 or fewer

more than 1 m

less than 1 m

Outdoor unit Indoor unit

Indoor unit

Branch point

more than 1 m

Ground Ground

Shielded wire

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How to connect wiring to the terminal

■ For stranded wiring

(1) Cut the wire end with cutting pliers, then strip the insulation

to expose the stranded wire about 10 mm and tightly twist

the wire ends. (Fig. 4-5)

Fig. 4-5

(2) Using a Phillips head screwdriver, remove the terminal

screw(s) on the terminal plate.

(3) Using a ring connector fastener or pliers, securely clamp

each stripped wire end with a ring pressure terminal.

(4) Place the ring pressure terminal, and replace and tighten

the removed terminal screw using a screwdriver. (Fig. 4-6)

Fig. 4-6

■ Examples of shield wires

(1) Remove cable coat not to scratch braided shield. (Fig. 4-7)

(2) Unbraid the braided shield carefully and twist the

unbraided shield wires tightly together. Insulate the shield

wires by covering them with an insulation tube or wrapping

insulation tape around them. (Fig. 4-8)

(3) Remove coat of signal wire. (Fig. 4-9)

(4) Attach ring pressure terminals to the signal wires and the

shield wires insulated in Step (2). (Fig. 4-10)

8 mm

Stranded wire

Strip 10 mm

Ring

pressure

terminal

Wire

Special washer Screw

Wire

Ring pressure

terminal

Terminal plate

Screw and

Special washer

Ring

pressure

terminal

Fig. 4-7

Fig. 4-8

Fig. 4-9

Fig. 4-10

Insulation tape Shield mesh

■ Wiring sample

Outdoor unit : single-phase model

U1 U2

Outdoor unit : 3-phase model

U1 U2

Use this screw when

connecting to ground

for the inter-unit control

wiring.

Inter-unit Control Wiring Power Supply

Earth

Use this screw when

connecting to ground

for the inter-unit control

wiring.

Inter-unit Control Wiring Power Supply

Earth

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5. HOW TO PROCESS TUBING

Both the liquid tubing and the gas tubing sides are connected

by a flare nut.

5-1. Connecting the Refrigerant Tubing

Use of the Flaring Method

Many of conventional split system air conditioners employ the

flaring method to connect refrigerant tubes which run between

indoor and outdoor units. In this method, the copper tubes are

flared at each end and connected with flare nuts.

Flaring Procedure with a Flare Tool

(1) Cut the copper tube to the required length with a tube

cutter. It is recommended to cut approx. 30 – 50 cm longer

than the tubing length you estimate.

(2) Remove burrs at the end of the copper tube with a tube

reamer or file. This process is important and should be

done carefully to make a good flare. (Fig. 5-1)

NOTE

When reaming, hold the tube end downward and be sure that

no copper scraps fall into the tube. (Fig. 5-2)

(3) Remove the flare nut from the unit and be sure to mount it

on the copper tube.

(4) Make a flare at the end of the copper tube with a flare tool.

(Fig. 5-3)

NOTE

A good flare should have the following characteristics:

●inside surface is glossy and smooth

●edge is smooth

●tapered sides are of uniform length

Deburring

Before After Copper

tubing

Reamer

Fig. 5-1 Fig. 5-2

Flare nut

Copper

tubing

Flare tool Fig. 5-3

Caution Before Connecting Tubes Tightly

(1) Apply a sealing cap or water-proof tape to prevent dust or

water from entering the tubes before they are used.

(2) Be sure to apply refrigerant lubricant to the matching

surfaces of the flare and union before connecting them

together. This is effective for reducing gas leaks. (Fig. 5-4)

Fig. 5-4

(3) For proper connection, align the union tube and flare tube

straight with each other, then screw in the flare nut lightly

at first to obtain a smooth match. (Fig. 5-5)

Fig. 5-5

●Adjust the shape of the liquid tube using a tube bender at the

installation site and connect it to the liquid tubing side valve

using a flare.

Cautions During Brazing

●Replace air inside the tube with nitrogen gas to prevent

copper oxide film from forming during the brazing

process. (Oxygen, carbon dioxide and Freon are not

acceptable.)

●Do not allow the tubing to get too hot during brazing.

The nitrogen gas inside the tubing may overheat,

causing refrigerant system valves to become damaged.

Therefore allow the tubing to cool when brazing.

●Use a reducing valve for the nitrogen cylinder.

●Do not use agents intended to prevent the formation

of oxide film. These agents adversely affect the

refrigerant and refrigerant oil, and may cause damage or

malfunctions.

Apply refrigerant lubricant.

Union Flare nut

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5-2. Connecting Tubing Between Indoor and Outdoor

Units

(1) Tightly connect the indoor-side refrigerant tubing extended

from the wall with the outdoor-side tubing.

(2) To fasten the flare nuts, apply specified torque as shown in

the table below.

●When removing the flare nuts from the tubing connections,

or when tightening them after connecting the tubing, be sure

to use 2 adjustable wrenches or spanners. (Fig. 5-6)

If the flare nuts are over-tightened, the flare may be

damaged, which could result refrigerant leakage and cause

injury or asphyxiation to room occupants.

Fig. 5-6

●For the flare nuts at tubing connections, be sure to use the

flare nuts that were supplied with the unit, or else flare nuts

for R410A (type 2). The refrigerant tubing that is used must

be of the correct wall thickness as shown in the table below.

Tube diameter Tightening torque

(approximate) Tube thickness

ø6.35 (1/4") 14 – 18 N · m

(140 – 180 kgf · cm) 0.8 mm

ø9.52 (3/8") 34 – 42 N · m

(340 – 420 kgf · cm) 0.8 mm

ø12.7 (1/2") 49 – 55 N · m

(490 – 550 kgf · cm) 0.8 mm

ø15.88 (5/8") 68 – 82 N · m

(680 – 820 kgf · cm) 1.0 mm

ø19.05 (3/4")

100 – 120 N · m

(1000 – 1200 kgf · cm)

1.2 mm

Because the pressure is approximately 1.6 times higher than

conventional refrigerant pressure, the use of ordinary flare nuts

(type 1) or thin-walled tubes may result in tube rupture, injury, or

asphyxiation caused by refrigerant leakage.

●In order to prevent damage to the flare caused by over-

tightening of the flare nuts, use the table on this page as a

guide when tightening.

●When tightening the flare nut on the liquid tube, use an

adjustable wrench with a nominal handle length of 200 mm.

Torque wrench

Spanner

Indoor unit

Outdoor unit

5-3. Insulating the Refrigerant Tubing

Tubing Insulation

●Standard Selection of Insulation Material

Under the environment of the high temperature and high

humidity, the surface of the insulation material is easy to

become condesation. This will result in leakage and dew

drop. Refer to the chart shown below when selecting the

insulation material. In case that the ambient temperature and

relative humidity are placed above the line of the insulation

thickness, the condensation may occasionally make a dew

drop on the surface of the insulation material. In this case,

select the better insulation efficiency.

* However, since the condition will be different due to

the sort of the insulaton material and the environmental

condition of the installation place, see the chart shown

below as a reference when making a selection.

Standard Selection of Tubing Insulation

Calculating condition

Sort of insulation material Polyethylene heat resisting

material

Thermal conductivity of

insulation material Based on JIS A9501

Calculating formula used

when calculating thickness Based on JIS A9501

Refrigerant temperature 2°C

10 20304050 1020304050

10 2030405010 20304050

10 20304050

100 o6.35

100 o9.52

100 o12.7

100 o15.88

100 o19.05

Fig. 5-7

Thickness

30 mm

Thickness

20 mm

Thickness

10 mm

Ambient relative humidity [%]

Thickness

30 mm

Thickness

20 mm

Thickness

10 mm

Ambient relative humidity [%]

Thickness

30 mm

Thickness

20 mm

Thickness

10 mm

Thickness

30 mm

Thickness

20 mm

Thickness

10 mm

Ambient relative humidity [%]

Thickness

30 mm

Thickness

20 mm

Thickness

10 mm

Liquid tubing Gas tubing

Insulation

Ambient temperature [°C] Ambient temperature [°C]

Ambient temperature [°C]Ambient temperature [°C]

Ambient temperature [°C]

Two tubes arranged together

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CAUTION

If the exterior of the outdoor unit valves

has been finished with a square duct

covering, make sure you allow sufficient

space to use the valves and to allow the

panels to be attached and removed.

Taping the ﬂare nuts

Wind the white insulation tape around the flare nuts at the gas

tube connections. Then cover up the tubing connections with

the flare insulator, and fill the gap at the union with the supplied

black insulation tape. Finally, fasten the insulator at both ends

with the supplied vinyl clamps. (Fig. 5-8)

Fig. 5-8

Insulation material

The material used for insulation must have good insulation

characteristics, be easy to use, be age resistant, and must not

easily absorb moisture.

CAUTION

After a tube has been insulated, never try

to bend it into a narrow curve because it

can cause the tube to break or crack.

Fig. 5-9

Never grasp the drain or refrigerant connecting outlets

when moving the unit.

5-4. Taping the Tubes

(1) At this time, the refrigerant tubes (and electrical wiring

if local codes permit) should be taped together with

armoring tape in 1 bundle. To prevent condensation from

overflowing the drain pan, keep the drain hose separate

from the refrigerant tubing.

(2) Wrap the armoring tape from the bottom of the outdoor

unit to the top of the tubing where it enters the wall. As you

wrap the tubing, overlap half of each previous tape turn.

(3) Clamp the tubing bundle to the wall, using 1 clamp approx.

each meter. (Fig. 5-10)

Fig. 5-10

NOTE

Do not wind the armoring tape too tightly since this will

decrease the heat insulation effect. Also ensure that the

condensation drain hose splits away from the bundle and drips

clear of the unit and the tubing.

Sealer (supplied) Insulation tape (white)

(supplied)Flare insulator (supplied)

Tube insulator

(not supplied)

Heat resistant

120°C or above

Vinyl clamps (supplied)

Flare nut

Unit side

insulator

Clamp

Drain hoseInsulated tubes

5-5. Finishing the Installation

After finishing insulating and taping

over the tubing, use sealing putty to

seal off the hole in the wall to prevent

rain and draft from entering. (Fig. 5-11)

Fig. 5-11

6. AIR PURGING

Air and moisture in the refrigerant

system may have undesirable effects

as indicated below.

●pressure in the system rises

●operating current rises

●cooling (or heating) efficiency drops

●moisture in the refrigerant circuit may

freeze and block capillary tubing

●water may lead to corrosion of parts

in the refrigerant system

Therefore, the indoor unit and tubing

between the indoor and outdoor unit

must be leak tested and evacuated

to remove any noncondensables and

moisture from the system.

(Figs. 6-1 and 6-2)

Fig. 6-2

■Air Purging with a Vacuum Pump (for Test Run)

Preparation

Check that each tube (both liquid and gas tubes) between the

indoor and outdoor units has been properly connected and all

wiring for the test run has been completed. Remove the valve

caps from both the gas tube and liquid tube service valves on

the outdoor unit. Note that both liquid and gas tube service

valves on the outdoor unit are kept closed at this stage.

(Fig. 6-3)

Lo Hi

Fig. 6-3

Manifold gauge

Vacuum pump

Fig. 6-1

Outlet

Inlet

Manifold valve

Pressure

gauge

Gas tube

Liquid tube

Open

Cylinder

valve

Charge hose

Nitrogen gas cylinder

(In vertical standing

position)

Outdoor unit

Service port ø7.94 mm

Refrigerant tubing and insulator (not supplied)

Drain pipe and insulator (not supplied)

Drain insulator

and clamp. Large

(supplied)

Packing clamp.

Small hose band

(supplied)

Insulation tape

Vinyl clamp

Flare insulator

Seal The procedure used for

installing the insulator

for both gas and liquid

tubes is the same.

Apply putty here

Tubing

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Leak test

(1) Attach a manifold valve (with pressure gauges) and dry

nitrogen gas cylinder to this service port with charge

hoses.

CAUTION

Use a manifold valve for air purging. If it is not available,

use a stop valve for this purpose. The “Hi” knob of the

manifold valve must always be kept closed.

(2) Pressurize the system to no more than 3.80 MPa with dry

nitrogen gas and close the cylinder valve when the gauge

reading reaches 3.80 MPa. Then, test for leaks with liquid

soap.

CAUTION

To avoid nitrogen entering the refrigerant system in a

liquid state, the top of the cylinder must be higher than

the bottom when you pressurize the system. Usually, the

cylinder is used in a vertical standing position.

(3) Do a leak test of all joints of the tubing (both indoor and

outdoor) and both gas tube and liquid tube service valves.

Bubbles indicate a leak. Wipe off the soap with a clean

cloth after the leak test.

(4) After the system is found to be free of leaks, relieve the

nitrogen pressure by loosening the charge hose connector

at the nitrogen cylinder. When the system pressure is

reduced to normal, disconnect the hose from the cylinder.

Evacuation

(1) Attach the charge hose end described in the preceding

steps to the vacuum pump to evacuate the tubing and

indoor unit. Confirm that the “Lo” knob of the manifold

valve is open. Then, run the vacuum pump. The operation

time for evacuation varies with the tubing length and

capacity of the pump. The following table shows the

amount of time for evacuation:

Required time for evacuation

when 30 gal/h vacuum pump is used

If tubing length is

less than 15 m If tubing length is

longer than 15 m

45 min. or more 90 min. or more

NOTE

The required time in the above table is calculated based on the

assumption that the ideal (or target) vacuum condition is less

than –101 kPa (–755 mmHg, 5 Torr).

(2) When the desired vacuum is reached, close the “Lo”

knob of the manifold valve and turn off the vacuum pump.

Confirm that the gauge pressure is under –101 kPa

(–755 mmHg, 5 Torr) after 4 to 5 minutes of vacuum pump

operation. (Fig. 6-4)

LoHi

Fig. 6-4

CAUTION

Use a cylinder designed for use with R410A respectively.

Charging additional refrigerant

●Charging additional refrigerant (calculated from the liquid

tube length as shown in Section 1-7 “Additional Refrigerant

Charge”) using the liquid tube service valve. (Fig. 6-5)

●Use a balance to measure the refrigerant accurately.

●If the additional refrigerant charge amount cannot be

charged at once, charge the remaining refrigerant in liquid

form by using the gas tube service valve with the system in

cooling operation mode at the time of test run. (Fig. 6-6)

Manifold valve

Pressure

gauge

Gas tube

Liquid tube

Open

Vacuum pump

Outdoor unit

Service port ø7.94 mm

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Lo Hi

R410A

Fig. 6-5

Fig. 6-6

Finishing the job

(1) With a hex wrench, turn the liquid tube service valve stem

counterclockwise to fully open the valve.

(2) Turn the gas tube service valve stem counterclockwise to

fully open the valve.

CAUTION

To avoid gas from leaking when removing the charge hose,

make sure the stem of the gas tube is turned all the way

out.

(3) Loosen the charge hose connected to the gas tube service

port (for ø 7.94 mm tube) slightly to release the pressure,

then remove the hose.

(4) Replace the service port cap on the gas tube service port

and fasten the cap securely with an adjustable wrench or

box wrench. This process is very important to prevent gas

from leaking from the system.

(5) Replace the valve caps at both gas tube and liquid tube

service valves and fasten them securely.

This completes air purging with a vacuum pump. The air

conditioner is now ready for a test run. Refer to Section

“7. TEST RUN”.

Manifold valve

Pressure

gauge

Gas tube

Liquid tube

Open

Outdoor unit

Valve

Liquid

Gas tube

Liquid tube

Open

Outdoor unit

7. TEST RUN

7-1. Preparing for Test Run

●Before attempting to start the air conditioner, check the

following points.

(1) All loose matter is removed from the cabinet especially

steel filings, bits of wire, and clips.

(2) The control wiring is correctly connected and all electrical

connections are tight.

(3) The transportation pads for the indoor fan have been

removed. If not, remove them now.

(4) The power has been supplied to the unit for at least 5

hours before starting the compressor. The bottom of

the compressor should be warm to the touch and the

crankcase heater around the feet of the compressor should

be hot to the touch. (Fig. 7-1)

Fig. 7-1

(5) Both the gas and liquid tube service valves are open.

If not, open them now. (Fig. 7-2)

Fig. 7-2

(6) Request that the customer be present for the test run.

Explain the contents of the instruction manual, and then

have the customer actually operate the system.

(7) Be sure to give the instruction manual and warranty

certificate to the customer.

(8) When replacing the control PCB, be sure to make all the

same settings on the new PCB as were in use before

replacement.

The existing EEPROM is not changed, and is connected to

the new control PCB.

(Power must be turned ON at least

5 hours before attempting test run)

Power mains switch

Liquid tube service cap

Gas tube service cap

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7-2. Test Run Procedure

Items to Check Before the Test Run

Turn the remote power switch on at least 5 hours before the test, in order to energize the crankcase heater.

Turn the outdoor service valves (2 locations) to the full-open positions.

●Use caution when making the settings.

If there are duplicated system addresses, or if the settings for the Nos. of the indoor units are not consistent, an alarm will occur

and the system will not start.

●These settings are not made on the indoor unit PCB.

*2 *2

3*3*

Recheck the items to check before the test run.

Set the No. of indoor units.

Set the system address.

Each system to be a unique number.

When multiple outdoor units exist, disconnect the terminals extended

from the shorted plugs (CN-TERMINAL) at all outdoor main unit PCBs

except for 1. Alternatively, move the sockets to the OPEN side.

Will automatic address setting be performed

in Heating mode?

Is it OK to start the compressors?

Turn ON the indoor and

outdoor unit power.

Check the alarm

contents.

Are LEDs 1 and 2 on the outdoor

unit PCB OFF?

Set the wired remote controller for test run.

Return remote control to normal mode

Does system operate? Check and make corrections according to

“Table of Self-Diagnostic Functions.”

CASE 2

Make necessary corrections.

Turn OFF the indoor and

outdoor unit power.

Check the alarm contents.

Turn ON the indoor and

outdoor unit power for that

refrigerant system only.

Short-circuit the automatic address pin

(CN-A.ADD) on the outdoor unit PCB

for 1 second or longer, then release it.

LED 1 and 2 blink alternately

(about 2 or 3 minutes).

Are LEDs 1 and 2 on the

outdoor unit PCB OFF?

Are the inter-unit control wires

connected to more than 1 refrigerant

system?

Is it possible to turn ON the power only

for the 1 refrigerant system where the

test run will be performed?

Turn ON the indoor and

outdoor unit power.

Short-circuit the cooling side of the

mode change 3P pin (CN-MODE) on

the outdoor main unit PCB. At the

same time, short-circuit the automatic

address pin (CN-A.ADD) for 1 second

or longer, then pull it out. *1

Short-circuit the automatic

address pin (CN-A.ADD) on the

outdoor unit PCB for 1 second

or longer, then release it. *1

Start indoor and outdoor unit

cooling operation. LED 1 and

2 blink alternately.

Start indoor and outdoor unit

heating operation. LED 1

and 2 blink alternately.

Check that test run preparation is OK.

(Do not allow the short-circuited pins to remain short-circuited.)

End test run.

Refer to the remote

controller test-run

settings.

Refer to Figs. 7-4, -5

Unit No. setting switch

(S002 and S003)

(Check the link wiring.)

Unit No. setting switch

(S004)

*1 Use a flathead screwdriver to short-circuit the pin on the PC board.

*2 A minimum of 5 hours must have passed after the power was turned ON to

the outdoor unit.

*3 All indoor units operate in all refrigerant systems where the power is ON.

YES

CASE 1

YES

CASE 3B CASE 3A

YES

Turn OFF the indoor

and outdoor unit

Make necessary

corrections

YES

Refer to “Table of

Self-Diagnostic Functions

and Description of Alarm

Displays.”

YES

Fig. 7-3

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7-3. Outdoor Unit PCB Setting

Fig. 7-4

(for single-phase outdoor unit PCB)

CN-A.ADD

CN-MODE

D303

(LED2)

D302

(LED1)

S003

CN-TERMINAL

S002

S004

CN-A.ADD

CN-MODE

D303

(LED2)

D302

(LED1)

S003

CN-TERMINAL

S002

S004

(for 3-phase outdoor unit PCB)

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●Examples of the No. of indoor units settings

No. of indoor units Indoor unit setting (S004)

(Rotary switch, gray)

1 unit (factory setting) set to 1

2 units set to 2

9 units set to 9

●Examples of refrigerant circuit (R.C.) address settings

(required when link wiring is used)

System address

No.

System address

(S003)

(2P DIP switch, black)

System address

(S002)

(Rotary switch, yellow)

System 1 (factory setting)

set to 1

System 11

set to 1

System 21

set to 1

System 30

set to 0

Both OFF

1 ON

2 ON

1&2 ON

OFF

7-4. Auto Address Setting

Basic wiring diagram: Example (1)

•

If link wiring is not used

(The inter-unit control wires are not connected to multiple

refrigerant systems.)

Indoor unit addresses can be set without operating the

compressors.

(S004)

(S003) (S002)

1-1 1-2 1-3 1-8

Fig. 7-6

(1) Automatic Address Setting from the Outdoor Unit

On the outdoor unit control PCB, check that the system

address rotary switch (S002) is set to “1” and that the DIP

switch (S003) is set to “0”.

ON ON

OFF

(These are the settings at the time of factory shipment.)

To set the number of indoor units that are connected to the

outdoor unit to 8 on the outdoor unit control PCB, set the

No. of indoor units rotary switch (S004) to “8”.

3Turn ON the power to the indoor and outdoor units.

4On the outdoor unit control PCB, short-circuit the automatic

address pin (CN-A.ADD) for 1 second or longer, then

release it.

(Communication for automatic address setting begins.)

To cancel, again short-circuit the automatic

address pin (CN-A.ADD) for 1 second or

longer, then pull it out.

The LED that indicates that automatic address

setting is in progress turns OFF and the

process is stopped.

(Automatic address setting is completed when LEDs 1 and

2 on the outdoor unit control PCB turn OFF.)

5Operation from the remote controllers is now possible.

To perform automatic address setting from the remote

controller, perform steps 1 to 3, then use the remote

controller and complete automatic address setting.

Refer to “Automatic Address Setting from the Remote

Controller.”

No. 1 unit settings

System address

(system 1 setting) No. of indoor units

(8 units setting)

Outdoor

Unit Unit

No. 1

Indoor Unit

Remote

controller

Inter-unit control wiring

Remote controller

communication wiring

OFF

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Basic wiring diagram: Example (2)

• If link wiring is used

When multiple outdoor units exist, remove the socket that is

used to short-circuit the terminal plug (CN-TERMINAL) from

all outdoor unit PCBs except for 1. Alternatively, move the

sockets to the “OPEN” side.

1-1 1-2

2-1 2-2 2-7

1-3 1-6

(S004)

(S003) (S002)

(S004)

(S003)(S002)

OFF

Make settings as appropriate for the cases listed below.

Indoor and outdoor unit power can be

turned ON for each system separately. <Case 2>

Indoor and outdoor unit power cannot

be turned ON for each system separately.

Automatic address setting in Heating mode

Automatic address setting in Cooling mode

No. 1 unit settings

System address

(system 1 setting) No. of indoor units

(6 units setting)

Outdoor unit

system 1

Leave the socket

that is used to

short-circuit the

terminal plug.

(CN-TERMINAL)

Unit

No. 1

Inter-unit control wiring

Indoor unit

Remote

controller Remote controller

communication wiring

No. 2 unit settings

System address

(system 2 setting) No. of indoor units

(7 units setting)

Unit

No. 1

Outdoor unit

system 2

Leave the socket

that is used to

open circuit the

terminal plug

(CN-TERMINAL).

Indoor unit

Inter-unit control wiring

To other system

link wiring

Remote

controller Remote controller

communication wiring

Fig. 7-7

Automatic Address Setting (no compressor

operation)

●Indoor and outdoor unit power can be turned ON for each

system separately.

Indoor unit addresses can be set without operating the

compressors.

Automatic Address Setting from Outdoor Unit

On the outdoor unit control PCB, check that the system

address rotary switch (S002) is set to “1” and that the DIP

switch (S003) is set to “0”.

(These are the settings at the time of factory shipment.)

To set the number of indoor units that are connected to the

outdoor unit to 6 on the outdoor unit control PCB, set the

No. of indoor units rotary switch (S004) to “6”.

At the outdoor unit where all indoor and outdoor unit power

has been turned ON, short-circuit the automatic address

pin (CN-A.ADD) for 1 second or longer, then pull it out.

(Communication for automatic address setting begins.)

To cancel, again short-circuit the automatic

address pin (CN-A.ADD) for 1 second or

longer, then pull it out.

The LED that indicates automatic address

setting is in progress turns OFF and the

process is stopped.

(Automatic address setting is completed when LEDs 1 and

2 on the outdoor unit control PCB turn OFF.)

4Next turn the power ON only for the indoor and outdoor

units of the next (different) system. Repeat steps 1 – 3 in

the same way to complete automatic address settings for

all systems.

5Operation from the remote controllers is now possible.

To perform automatic address setting from the remote

controller, perform steps 1 and 2, then use the remote

controller complete automatic address setting.

Refer to “Automatic Address Setting from the Remote

Controller.”

ON ON

OFF

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Automatic Address Setting in Heating Mode

●Indoor and outdoor unit power cannot be turned ON for each

system separately.

In the following, automatic setting of indoor unit addresses is

not possible if the compressors are not operating. Therefore

perform this process only after completing all refrigerant

tubing work.

Automatic Address Setting from Outdoor Unit

1Perform steps 1 and 2 in the same way as for <Case 2> .

2Turn the indoor and outdoor unit power ON at all systems.

3To perform automatic address setting in <Heating mode>,

on the outdoor unit control PCB in the refrigerant system

where you wish to set the addresses, short-circuit the

automatic address pin (CN-A.ADD) for 1 second or longer,

then pull it out.

(Be sure to perform this process for one system at a time.

Automatic address settings cannot be performed for more

than one system at the same time.)

(Communication for automatic address setting begins, the

compressors turn ON, and automatic address setting

in heating mode begins.)

(All indoor units operate.)

To cancel, again short-circuit the automatic

address pin (CN-A.ADD) for 1 second or

longer, then pull it out.

The LED that indicates automatic address

setting is in progress turns OFF and the

process is stopped.

(Automatic address setting is completed when the

compressors stop and LEDs 1 and 2 on the outdoor unit

control PCB turn OFF.)

4At the outdoor unit in the next (different) system, short-

circuit the automatic address pin (CN-A.ADD) for 1 second

or longer, then pull it out.

(Repeat the same steps to complete automatic address

setting for all units.)

5Operation from the remote controllers is now possible.

To perform automatic address setting from the remote

controller, perform steps 1 and 2, then use the remote

controller complete automatic address setting.

Refer to “Automatic Address Setting from the Remote

Controller.”

Automatic Address Setting in Cooling Mode

●Indoor and outdoor unit power cannot be turned ON for each

system separately.

In the following, automatic setting of indoor unit addresses is

not possible if the compressors are not operating. Therefore

perform this process only after completing all refrigerant

tubing work.

Automatic address setting can be performed during Cooling

operation.

Automatic Address Setting from Outdoor Unit

1Perform steps 1 and 2 in the same way as for <Case 2> .

2Turn the indoor and outdoor unit power ON at all systems.

3To perform automatic address setting in <Cooling mode>,

on the outdoor unit control PCB in the refrigerant system

where you wish to set the addresses, short-circuit the

cooling side of the mode change 3P pin (CN-MODE). At

the same time, short-circuit the automatic address pin

(CN-A.ADD) for 1 second or longer, then pull it out. (Be

sure to perform this process for one system at a time.

Automatic address settings cannot be performed for more

than one system at the same time.)

(Communication for automatic address setting begins, the

compressors turn ON, and automatic address setting

in Cooling mode begins.)

(All indoor units operate.)

To cancel, again short-circuit the automatic

address pin (CN-A.ADD) for 1 second or

longer, then pull it out.

The LED that indicates automatic address

setting is in progress turns OFF and the

process is stopped.

(Automatic address setting is completed when the

compressors stop and LEDs 1 and 2 on the outdoor unit

control PCB turn OFF.)

4At the outdoor unit in the next (different) system, short-

circuit the automatic address pin (CN-A.ADD) for 1 second

or longer, then pull it out.

(Repeat the same steps to complete automatic address

setting for all units.)

5Operation from the remote controllers is now possible.

Automatic address setting in Cooling mode cannot be

done from the remote controller.

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Automatic Address Setting from the Remote Controller*

Selecting each refrigerant system individually for automatic

address setting

---Automatic address setting for each system: Item code “A1”

●Press the remote controller timer time button and

button at the same time. (Press and hold for 4 seconds or

longer.)

●Next, press either the temperature setting or

button.

(Check that the item code is “A1.”)

●Use either the or button to set the system

No. to perform automatic address setting.

●Then press the button.

(Automatic address setting for one refrigerant system

begins.)

(When automatic address setting for one system is

completed, the system returns to normal stopped status.)

(During automatic address setting, “ ” is displayed

on the remote controller. This message disappears when

automatic address setting is completed.)

●Repeat the same steps to perform automatic address setting

for each successive system.

Display during automatic address setting

●On outdoor unit PCB

LED 1

Do not short-circuit the automatic address setting pin

(CN-A.ADD) again while automatic address setting is in

progress. Doing so will cancel the setting operation and

will cause LEDs 1 and 2 to turn OFF.

* When automatic address setting has been successfully

completed, both LEDs 1 and 2 turn OFF.

* LED 1 is D302. LED 2 is D303.

* If automatic address setting is not completed

successfully, refer to the table below and correct the

problem. Then perform automatic address setting again.

●Display details of LEDs 1 and 2 on the outdoor unit control

PCB

( : ON : Blinking ● : OFF)

LED 1 LED 2 Display meaning

After the power is turned ON (and automatic address

setting is not in progress), no communication with the

indoor units in that system is possible.

●

After the power is turned ON (and automatic address

setting is not in progress), 1 or more indoor units are

confirmed in that system; however, the number of

indoor units does not match the number that was set.

Automatic address setting is in progress.

Alternating

●●

Automatic address setting completed.

At time of automatic address setting, the number

of indoor units did not match the number that was

set. (when indoor units are operating) indication

appears on the display.

Simultaneous

Refer to Table of Self-Diagnostic Functions and

Description of Alarm Displays.

Alternating

Note: indicates that the solenoid is fused or that there is a

CT (current detection circuit) failure (current is detected

when the compressor is OFF).

●Remote controller display during automatic setting

Blink alternately

is blinking

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Request concerning recording the indoor/outdoor

unit combination Nos.

After automatic address setting has been completed, be sure to

record them for future reference.

List the outdoor unit system address and the addresses of the

indoor units in that system in an easily visible location (next

to the nameplate), using a permanent marking pen or similar

means that cannot be erased easily.

Example: (Outdoor) 1 – (Indoor) 1-1, 1-2, 1-3…

(Outdoor) 2 – (Indoor) 2-1, 2-2, 2-3…

These numbers are necessary for later maintenance. Please be

sure to indicate them.

Checking the indoor unit addresses

Use the remote controller to check the indoor unit address.

1Press and hold the button and button for 4

seconds or longer (simple settings mode).

2The address is displayed for the indoor unit that is

connected to the remote controller.

(Only the address of the indoor unit that is connected to

the remote controller can be checked.)

3Press the button again to return to normal remote

controller mode.

<If multiple indoor units are connected to 1 remote

controller (group control)>

1Press and hold the button and button for 4

seconds or longer (simple settings mode).

2“ALL” is displayed on the remote controller.

3Next, press the button.

4The address is displayed for 1 of the indoor units which is

connected to the remote controller. Check that the fan of

that indoor unit starts and that air is discharged.

5Press the button again and check the address of

each indoor unit in sequence.

6Press the button again to return to normal remote

controller mode.

Indoor unit address

Number changes to indicate which

indoor unit is currently selected.

Indoor unit address

Number changes to indicate which

indoor unit is currently selected.

Remote Controller Test Run Settings

1Press the remote controller button for 4 seconds or

longer. Then press the button.

●“TEST” appears on the LCD display while the test run is

in progress.

●The temperature cannot be adjusted when in Test Run

mode.

(This mode places a heavy load on the machines.

Therefore use it only when performing the test run.)

2The test run can be performed using the HEAT, COOL, or

FAN operation modes.

Note: The outdoor units will not operate for approximately

3 minutes after the power is turned ON and after

operation is stopped.

3If correct operation is not possible, a code is displayed on

the remote controller display.

(Refer to “7-6. Meaning of Alarm Messages” and correct

the problem.)

4After the test run is completed, press the button

again. Check that “TEST” disappears from the remote

controller display.

(To prevent continuous test runs, this remote controller

includes a timer function that cancels the test run after 60

minutes.)

If the test run is performed using the wired remote

controller, operation is possible even if the cassette-type

ceiling panel has not been installed. (“P09” display does

not occur.)

7-5. Caution for Pump Down

Pump down means refrigerant gas in the system is returned

to the outdoor unit. Pump down is used when the unit is to be

moved, or before servicing the refrigerant circuit.

CAUTION

●This outdoor unit cannot collect more than the rated

refrigerant amount as shown by the nameplate on the

back.

●If the amount of refrigerant is more than that

recommended, do not conduct pump down. In this case,

use another refrigerant collecting system.

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7-6. Meaning of Alarm Messages

Table of Self-Diagnostics Functions and Description of

Alarm Displays

Alarm messages are indicated by the blinking of LED 1 and 2

(D302, D303) on the outdoor unit PCB. They are also displayed

on the wired remote controller.

●Viewing the LED 1 and 2 (D302 and D303) alarm displays

LED 1 LED 2 Alarm contents

Alarm display

LED 1 blinks M times, then LED 2 blinks N

times. The cycle then repeats.

M = 2: P alarm 3: H alarm 4: E alarm

5: F alarm 6: L alarm

N = Alarm No.

Example: LED 1 blinks 2 times, then

LED 2 blinks 17 times. The cycle then

repeats. Alarm is “P17”.

Alternating

( : Blinking)

Possible cause of malfunction Alarm

message

Serial communication errors⁄Mis-setting

Remote controller

is detecting error

signal from indoor

unit.

Error in receiving serial

communication signal. (Signal

from main indoor unit in case of

group control) Ex: Auto address

is not completed.

<E01>

Error in transmitting serial

communication signal.

<E02>

Indoor unit is detecting error signal from remote

controller (and system controller). <<E03>>

Indoor unit is

detecting error

signal from main

outdoor unit.

Error in receiving serial

communication signal. When

turning on the power supply,

the number of connected indoor

units does not correspond to

the number set. (Except R.C.

address is “0”.)

E04

Error of the outdoor unit in

receiving serial communication

signal from the indoor unit.

<E06>

Improper setting

of indoor unit or

remote controller.

Indoor unit address setting is

duplicated.

E08

Remote controller address

connector (RCU. ADR) is

duplicated. (Duplication of main

remote controller)

<<E09>>

During auto

address setting,

number of

connected

units does not

correspond to

number set.

When turning

on the power

supply, number

of connected

units does not

correspond to

number set.

(Except R.C.

address is “0”.)

Starting auto address setting is

prohibited.

This alarm message shows that

the auto address connector

CN-A.ADD is shorted while

other RC line is executing auto

address operation.

E12

Error in auto address setting.

(Number of connected indoor

units is less than the number

set)

E15

Error in auto address setting.

(Number of connected indoor

units is more than the number

set)

E16

No indoor unit is connected

during auto address setting.

E20

Main outdoor unit is detecting

error signal from sub outdoor

unit.

E24

Error of outdoor unit address

setting.

E25

The number of connected main

and sub outdoor units do not

correspond to the number set

at main outdoor unit PCB.

E26

Error of sub outdoor unit in

receiving serial communication

signal from main outdoor unit.

E29

Outdoor unit serial

communication failure.

E30

Possible cause of malfunction Alarm

message

Serial communication errors⁄Mis-setting

Indoor unit

communication

error of group

control wiring.

Error of main indoor unit in

receiving serial communication

signal from sub indoor units.

E18

Improper setting. This alarm message shows

when the indoor unit for

multiple-use is not connected

to the outdoor unit.

L02

Duplication of main indoor

unit address setting in group

control. <L03>

Duplication of outdoor R.C.

address setting. L04

There are

2 or more

indoor units

controllers

which have

operation

mode priority

in 1 refrigerant

circuit.

Priority set

remote

controller L05

Non-priority

set remote

controller L06

Group control wiring is

connected to individual control

indoor unit. L07

Indoor unit address is not set. L08

Capacity code of indoor unit is

not set. <<L09>>

Capacity code of outdoor unit

is not set. L10

Mis-matched connection of

outdoor units which have

different kinds of refrigerant. L17

4-way valve operation failure L18

Activation of protective device

Protective device

in outdoor unit is

activated.

Thermal protector in indoor unit

fan motor is activated. <<P01>>

Improper wiring connections of

ceiling panel. <<P09>>

Float switch is activated. <<P10>>

Operation of protective function

of fan inverter <<P12>>

Compressor thermal protector

is activated.

Power supply voltage is

unusual. (The voltage is more

than 260 V or less than 160 V

between L and N phase.)

P02

Incorrect discharge

temperature. (Comp. No. 1) P03

High-pressure switch P04

Power supply circuit failure,

missing-phase detection. P05

Forgot to open service valve P13

O2sensor (detects low oxygen

level) activated. P14

Compressor running failure

resulting from missing phase

in the compressor wiring, etc.

(Start failure not caused by

IPM or no gas.)

P16

Outdoor unit fan motor is

unusual. P22

IPM trip (IPM current or

temperature) H31

Missing-phase/reverse-phase

in the compressor wiring,

Compressor start-up failure

(Overcurrent at time of INV

compressor starts up, etc.)

P29

continued

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