Mitsubishi SEZ-KD25VAL, SEZ-KD35VAL, SEZ-KD50VAL, SEZ-KD60VAL, SEZ-KD71VAL Installation Manual

Air-Conditioners

SEZ-KD25,KD35,KD50,KD60,KD71VAL

INSTALLATION MANUAL

For safe and correct use, please read this installation manual thoroughly before installing the air-conditioner
unit.

INSTALLATIONSHANDBUCH

Zum sicheren und ordnungsgemäßen Gebrauch der Klimaanlage das Installationshandbuch gründlich
durchlesen.

MANUEL D’INSTALLATION

Veuillez lire le manuel d’installation en entier avant d’installer ce climatiseur pour éviter tout accident et vous
assurer d’une utilisation correcte.

MANUAL DE INSTALACIÓN

Para un uso seguro y correcto, lea detalladamente este manual de instalación antes de montar la unidad de
aire acondicionado.

MANUALE DI INSTALLAZIONE

Per un uso sicuro e corretto, leggere attentamente questo manuale di installazione prima di installare il condizionatore
d’aria.

INSTALLATIEHANDLEIDING

Voor een veilig en juist gebruik moet u deze installatiehandleiding grondig doorlezen voordat u de airconditioner
installeert.

INSTALLATIONSMANUAL

Läs denna installationsmanual noga för säkert och korrekt bruk innan luftkonditioneringen installeras.

INSTALLATIONSMANUAL

Læs venligst denne installationsmanual grundigt, før De installerer airconditionanlægget, af hensyn til sikker og
korrekt anvendelse.

FOR INSTALLER

FÜR INSTALLATEURE

POUR L’INSTALLATEUR

PARA EL INSTALADOR

PER L’INSTALLATORE

VOOR DE INSTALLATEUR

FÖR INSTALLATÖREN

TIL INSTALLATØREN

English

Deutsch

Français

Español

Italiano

Nederlands

Svenska

Dansk

MANUAL DE INSTALAÇÃO

Para segurança e utilização correctas, leia atentamente este manual de instalação antes de instalar a unidade
de ar condicionado.

E°XEIPI¢IO O¢H°IøN E°KATA™TA™H™

°И· ·ЫК¿ПВИ· О·И ЫˆЫЩ‹ ¯Ъ‹ЫЛ, ·Ъ·О·ПВ›ЫЩВ ‰И·‚¿ЫВЩВ ЪФЫВ¯ЩИО¿ ·˘Щfi ЩФ ВБ¯ВИЪ›‰ИФ ВБО·Щ¿ЫЩ·ЫЛ˜
ЪИУ ·Ъ¯›ЫВЩВ ЩЛУ ВБО·Щ¿ЫЩ·ЫЛ ЩЛ˜ МФУ¿‰·˜ ОПИМ·ЩИЫМФ‡.

РУКОВОДСТВО ПО УСТАНОВКЕ

Для осторожного и правильного использования прибора необходимо тщательно ознакомиться с данным
руководством по установке до выполнения установки кондиционера.

MONTAJ ELK‹TABI

Emniyetli ve do¤ru biçimde nas›l kullan›laca¤›n› ö¤renmek için lütfen klima cihaz›n› monte etmeden önce bu
elkitab›n› dikkatle okuyunuz.

PARA O INSTALADOR

°π∞ ∞À∆√¡ ¶√À ∫∞¡∂π ∆∏¡ ∂°∫∞∆∞™∆∞™∏

ДЛЯ УСТАНОВИТЕЛЯ

MONTÖR ‹Ç‹N

Português

∂ППЛУИО¿

Русский

Türkçe

3

[Fig. 3-1]

3.1

C

50~150 450

23

90

B

A

450

C

4

625

B
A

[Fig. 3-2]

■ SUZ-KA25VA

A

49

2

D

100

D

B

20

1

3

200

F

E

A

E

A Access door
B Electrical parts box
C Air inlet
D Air outlet
E Ceiling surface
F Service space (viewed from the side)
G Service space (viewed from the direction of arrow)

1 600 mm or more
2 100 mm or more
3 10 mm or more
4 300 mm or more

(mm)

Model

G

777

SEZ-KD25
SEZ-KD35, 50
SEZ-KD60, 71

A
700
900

1100

B
752
952

1152

C
798
998

1198

D
660
860

1060

E

800
1000
1200

3.3

C

A

A 100 mm or more
B 350 mm or more
C Basically open 100 mm or more without only obstruction in front and on

both sides of the unit.

D

B

D 200 mm or more (Open two sides of left, right, or rear side.)

4

[Fig. 4-1]

Z

5

5.1

[Fig. 5-1] [Fig. 5-2] [Fig. 5-3]

A

B

A Unit body
B Lifting machine

LW

YX

A

C

D

E

C Nuts (field supply)
D Washers (accessory)
E M10 hanging bolt (field supply)

A Center of gravity

D

C

5.2

A

A Indoor unit’s bottom surface

2

6

C C C

[Fig. 6-1]

6.1

a

ØA

ØB

b

a Indoor unit
b Outdoor unit

Model
SEZ-KD25, 35
SEZ-KD50
SEZ-KD60
SEZ-KD71

A

9.52

12.7

15.88

15.88

B

6.35

6.35

6.35

9.52

6.2

[Fig. 6-3]

a

a Copper tubes
b Good

[Fig. 6-6]

a

a Flaring tool
b Die
c Copper tube

[Fig. 6-9]

A

[Fig. 6-4] [Fig. 6-5]

90°

c No good
d Tilted

dcbef

e Uneven
f Burred

a

a Burr
b Copper tube/pipe

[Fig. 6-7]

A

a

e

b

d

c

d Flare nut
e Yo ke

b

c

a Smooth all around
b Inside is shining without

c Even length all around

c

any scratches

B

C

D

E

M

L

F

E

L

G

AG

b

c

d

c Spare reamer
d Pipe cutter

b

defgh

i

d Too much
e Tilted
f Scratch on

flared plane

H

F

H

g Cracked
h Uneven
i Bad examples

I

L

K

a

b

a Flare nut
b Copper tube

6.3

[Fig. 6-8]

J

O

J

N

20

20

O

20

20

N

A Pipe cover (small) (accessory)
B Caution:

Pull out the thermal insulation on the refrigerant piping at the
site, insert the flare nut to flare the end, and replace the insu­lation in its original position.

Take care to ensure that condensation does not form on ex­posed copper piping.

C Liquid end of refrigerant piping

[Fig. 6-10]

A

B 1

D 2

A Downward slope 1/100 or more
B Connection dia. R1 external thread
C Indoor unit
D Collective piping
E Maximize this length to approx. 10 cm

D Gas end of refrigerant piping
E Site refrigerant piping
F Main body
G Pipe cover (large) (accessory)
H Thermal insulation (field supply)
I Pull
J Flare nut
K Return to original position

L Ensure that there is no gap here
M Plate on main body
N Band (accessory)
O Ensure that there is no gap here. Place join upwards.

6.5

[Fig. 6-11]

I

A

B

F

G

E

525

D

H

E

C

A Indoor unit
B Pipe cover (short) (accessory)
C Tie band (accessory)
D Band fixing part
E Insertion margin

F Drain hose (accessory)
G Drain pipe (O.D. ø32 PVC TUBE, field supply)
H Insulating material (field supply)
I Max.145 ± 5 mm

3

7

[Fig. 7-1]

F

E

DC

BA

G

A Air inlet
B Air outlet
C Access door
D Ceiling surface
E Canvas duct
F Air filter
G Inlet grille

8

[Fig. 8-1]

E

[Fig. 8-2-1]

For Power supply

B

8.1

A Indoor unit
B Outdoor unit

S1
S2
S3

S3

S2S1

A

C Signal receiving unit
D Wireless remote controller
E Main switch/fuse
F Grounding

E

C

D

For Power

supply

B

F

A A

C C

A

C

8.2

[Fig. 8-2-2]

A

B

A Screw holding cover (2pcs)
B Cover

[Fig. 8-2-3] [Fig. 8-2-4]

E

H

F

G

I

E Use PG bushing to keep the weight of the cable and external force from being

applied to the power supply terminal connector. Use a cable tie to secure the cable.

F Power source wiring
G Tensile force
H Use ordinary bushing
I Signal receiving unit wiring

J Terminal bed for power source and indoor transmission
K To 1-phase power source
L Connecting the signal receiving unit

Connect the signal receiving unit to the CN90 (Connect to the wireless remote
controller board) on the indoor unit using the supplied remote controller wire. Con­nect the signal receiving units to all the indoor units.

CN90

B

A Terminal bed box

A

C

S3

S2S1

B Knockout hole
C Remove

J

L

S3
S2

K

S1

4

8

[Fig. 8-3]

F Indoor controller

board

A Indoor terminal block

2

CN90

5

1

6

3

D Outdoor terminal block

E Power supply cord : 2.0 mm

8.2

A Indoor terminal block

B Earth wire (green/yellow)

4

C Indoor/outdoor unit

connecting wire
3-core 1.5 mm2 or
more

L

N

7

2

or more

B Earth wire (green/yellow)
C Indoor/outdoor unit connecting wire 3-

core 1.5 mm

D Outdoor terminal block
E Power supply cord : 2.0 mm2 or more
F Indoor controller board

1 Connecting cable

Cable 3-core 1.5 mm2, in conformity
with Design 245 IEC 57.

2 Indoor terminal block

2

or more

3 Outdoor terminal block
4 Always install an earth wire (1-core 1.5

mm2) longer than other cables

5 Signal receiving unit cable (accessory)

(wire length : 5 m)

6 Signal receiving unit
7 Power supply cord

Cable 3-core 2.0 mm2 or more, in con­formity with Design 245 IEC 57.

8.3

[Fig. 8-4]

B-1. B-2.

A

D

C

E

F

I

G

B

H

I

H

A For installation in the switch box:
B For direct installation on the wall select one of the following:

• Prepare a hole through the wall to pass the remote controller cord (in order to run the remote controller cord from
the back), then seal the hole with putty.

• Run the remote controller cord through the cut-out upper case, then seal the cut-out notch with putty similarly as
above.

[Fig. 8-5]

Standard 1:1

OC(00)

A

TB1

TB4

C

B

A Outdoor unit

IC

CN90

1

D

B Refrigerant address
C Indoor unit
D Signal receiving unit

Indoor/outdoor wiring
Signal receiving unit wiring

I

C Wall
D Conduit
E Lock nut
F Bushing
G Switch box
H Remote controller cord
I Seal with putty

[Fig. 8-6]

J41

J42

JP1

JP2

JP3

CN90 CN4F CN44 CN20(Red) CNMF

CN90: Connector for remote controller wire connection

[Fig. 8-7]

IC IC IC IC

CN90 CN90 CN90 CN90

Pair number: 0 Pair number: 1 Pair number: 2 Pair number: 3

Pair number: 0 Pair number: 1 Pair number: 2 Pair number: 3

SW1 SW2

CN2L

Controller circuit board on the indoor unit (reference)

IC IC IC IC

CN90 CN90 CN90 CN90

Pair number: 0 Pair number: 0 Pair number: 0 Pair number: 0

ON OFF

SWE

CN32

CN41CN51

CN22(Blue)

Pair number: 0

CN3C(Blue)

CN01

(Black)

CNP

(Blue)

[Fig. 8-9][Fig. 8-8]

IC

CN90

Pair number: 0 Pair number: 0

Pair number: 0

IC

CN90

5

8

[Fig. 8-10]

8.3

A

F

[Fig. 8-11]

[Fig. 8-12]

B

E

G

C

D

H

Ceiling cassette type, Ceiling concealed type

Indoor unit

C

A

B

C

A Signal receiving unit external
B Center of Switch box
C Switch box
D Installation pitch
E 6.5 mm (1/4 inch)
F 70 mm (2 - 3/4 inch)
G 83.5 ± 0.4 mm (3 - 9/32 inch)
H Protrusion (pillar, etc)

A

B

A Remote controller wire
B Hole (drill a hole on the ceiling to pass the remote controller wire.)
C Signal Receiving Unit

A Fix tightly with tape.
B Remote controller wire
C Order wire

[Fig. 8-13]

[Fig. 8-14]

[Fig. 8-15]

1

1

2

When using the switch box

Wall

A

A

Insert the minus screwdriver toward the
arrow pointed and wrench it to remove
the cover.
A flat screwdriver whose width of blade is
between 4 and 7 mm (5/32 - 9/32 inch)
must be used.

A

B
C

D
E

F

G

1 Hang the cover to the upper hooks (2 places).
2 Mount the cover to the lower case

A Cross-section of upper hooks

When installing directly on the wall

H

I

J

A 150 mm (5 - 15/16 inch)
B Remote controller wire (Accessory)
C Wiring pipe
D Locknut

E Bushing
F Switch box
G Seal around here with putty

H Seal around here with putty
I Remote controller wire
J Seal around here with putty

6

8

[Fig. 8-16]

8.3

Insert the minus screwdriver toward the
arrow pointed and wrench it to remove the
cover.
A flat screwdriver whose width of blade is
between 4 and 7 mm (5/32 - 9/32 inch)
must be used.

[Fig. 8-17]

[Fig. 8-18]

[Fig. 8-19]

AB

1

1

A

C

A Screw (M4 × 30)

D

A Thin-wall portion
B Bottom case
C Remote controller wire
D Conducting wire

* When installing the lower case directly on the wall or the ceiling,

use wood screws.

1 Hang the cover to the upper hooks (2 places).

A

2

2 Mount the cover to the lower case

A Cross-section of upper hooks

8.4

[Fig.8-20] [Fig. 8-21]

Service panel

Be sure to fix the
indoor/outdoor unit
connecting wire using
this cord clamp.

Remove one fixing
screw to open the
service panel.

A

C

B

A Loosen terminal screw
B Terminal block
C Lead wire

7

[Fig.8-22]

8.5

12

CHECK

E

F

ON/OFF TEMP

FAN

VANE

MODE

LOUVER

CHECK

TEST RUN

RESETSET CLOCK

AUTO STOP

AUTO START

h

min

D

C

A
B

3

CHECK CHECK

9

4

CHECKCHECK

A Hour button
B Minute button
C TEMP button
D TEMP button
E ON/OFF button
F CHECK button

9.1

[Fig. 9-1]

TEST RUN

ON/OFF TEMP

10

[Fig. 10-1]

FAN

AUTO STOP

B

A

MODE

CHECK

TEST RUN

VANE

LOUVER

RESETSET CLOCK

AUTO START

h

min

C
D

10.1

B

A

G

L

K

H

I

J

A Indoor unit
B Union
C Liquid pipe
D Gas pipe
E Stop valve
F Outdoor unit
G Refrigerant gas cylinder operating valve

A TEST RUN button
B MODE button
C FAN button
D VANE button

E

C
D

F

M

H Refrigerant gas cylinder for R410A with

siphon

I Refrigerant (liquid)
J Electronic scale for refrigerant charging
K Charge hose (for R410A)
L Gauge manifold valve (for R410A)
M Service port

8

Contents

1. Safety precautions ................................................................................... 9

2. Selecting the installation location ............................................................. 9

3. Selecting an installation site & Accessories ........................................... 10

4. Fixing hanging bolts ............................................................................... 10

5. Installing the unit .................................................................................... 10

6. Refrigerant piping work .......................................................................... 11

7. Duct work ............................................................................................... 12

8. Electrical work ........................................................................................ 13

1. Safety precautions

• Please report to or take consent by the supply authority before connection
to the system.

• Be sure to read “The following should always be observed for safety” before
installing the air conditioner.

• Be sure to observe the cautions specified here as they include important
items related to safety.

• The indications and meanings are as follows.
Warning:

Could lead to death, serious injury, etc.

Caution:

Could lead to serious injury in particular environments when operated incor­rectly.

• After reading this manual, be sure to keep it together with the instruction
manual in a handy place on the customer’s site.

Warning:

• Do not install it by yourself (customer).

Incomplete installation could cause injury due to fire, electric shock, the unit
falling or leakage of water. Consult the dealer from whom you purchased the
unit or special installer.

• Install the unit securely in a place which can bear the weight of the unit.

When installed in an insufficient strong place, the unit could fall causing in­jured.

• Use the specified wires to connect the indoor and outdoor units securely and

attach the wires firmly to the terminal board connecting sections so the stress
of the wires is not applied to the sections.
Incomplete connecting and fixing could cause fire.

• Do not use intermediate connection of the power cord or the extension cord

and do not connect many devices to one AC outlet.
It could cause a fire or an electric shock due to defective contact, defective
insulation, exceeding the permissible current, etc.

• Check that the refrigerant gas does not leak after installation has completed.

9. Test run .................................................................................................. 15

10. Maintenance .......................................................................................... 17

This Installation Manual describes only for the indoor unit and the connected
outdoor unit of SUZ series.
If the connected outdoor unit is MXZ series, refer to the Installation Manual for
MXZ series.

Symbols put on the unit

: Indicates an action that must be avoided.

: Indicates that important instructions must be followed.

: Indicates a part which must be grounded.

: Indicates that caution should be taken with rotating parts.

: Indicates that the main switch must be turned off before servicing.

: Beware of electric shock.

: Beware of hot surface.

Warning:

Carefully read the labels affixed to the main unit.

• Perform the installation securely referring to the installation manual.
Incomplete installation could cause a personal injury due to fire, electric shock,
the unit falling or leakage of water.

• Perform electrical work according to the installation manual and be sure to
use an exclusive circuit.
If the capacity of the power circuit is insufficient or there is incomplete elec­trical work, it could result in a fire or an electric shock.

• Attach the electrical part cover to the indoor unit and the service panel to the
outdoor unit securely.
If the electrical part cover in the indoor unit and/or the service panel in the
outdoor unit are not attached securely, it could result in a fire or an electric
shock due to dust, water, etc.

• Be sure to use the part provided or specified parts for the installation work.
The use of defective parts could cause an injury or leakage of water due to a
fire, an electric shock, the unit falling, etc.

• Ventilate the room if refrigerant leaks during operation.
If the refrigerant comes in contact with a flame, poisonous gases will be re­leased.

Caution:

• Perform grounding.
Do not connect the ground wire to a gas pipe, water pipe arrester or telephone
ground wire. Defective grounding could cause an electric shock.

• Do not install the unit in a place where an inflammable gas leaks.
If gas leaks and accumulates in the area surrounding the unit, it could cause
an explosion.

• Install a ground leakage breaker depending on the installation place (where it
is humid).
If a ground leakage breaker is not installed, it could cause an electric shock.

2. Selecting the installation location

2.1. Indoor unit

• Where airflow is not blocked.

• Where cool air spreads over the entire room.

• Where it is not exposed to direct sunshine.

• At a distance 1 m or more away from your TV and radio (to prevent picture from
being distorted or noise from being generated).

• In a place as far away as possible from fluorescent and incandescent lights (so the
infrared remote control can operate the air conditioner normally).

2.2. Outdoor unit

• Where it is not exposed to strong wind.

• Where airflow is good and dustless.

• Where it is not exposed to rain and direct sunshine.

• Where neighbours are not annoyed by operation sound or hot air.

• Where rigid wall or support is available to prevent the increase of operation sound
or vibration.

• Where there is no risk of combustible gas leakage.

• When installing the unit at a high level, be sure to fix the unit legs.

• Where it is at least 3 m away from the antenna of TV set or radio. (Otherwise,
images would be disturbed or noise would be generated.)

• Perform the drainage/piping work securely according to the installation
manual.
If there is a defect in the drainage/piping work, water could drop from the unit
and household goods could be wet and damaged.

• Fasten a flare nut with a torque wrench as specified in this manual.
When fastened too tight, a flare nut may broken after a long period and cause
a leakage of refrigerant.

• Where the air filter can be removed and replaced easily.

Warning:
Mount the indoor unit into a ceiling strong enough to withstand the weight of
the unit.

• Install the unit horizontally.

Caution:
Avoid the following places for installation where air conditioner trouble is li­able to occur.

• Where there is too much machine oil.

• Salty environment as seaside areas.

• Hot-spring areas.

• Where sulfide gas exists.

• Other special atmospheric areas.

9

3. Selecting an installation site & Accessories

• Select a site with sturdy fixed surface sufficiently durable against the weight of unit.

• Before installing unit, the routing to carry in unit to the installation site should be
determined.

• Select a site where the unit is not affected by entering air.

• Select a site where the flow of supply and return air is not blocked.

• Select a site where refrigerant piping can easily be led to the outside.

• Select a site which allows the supply air to be distributed fully in room.

• Do not install unit at a site with oil splashing or steam in much quantity.

• Do not install unit at a site where combustible gas may generate, flow in, stagnate
or leak.

• Do not install unit at a site where equipment generating high frequency waves (a
high frequency wave welder for example) is provided.

• Do not install unit at a site where fire detector is located at the supply air side. (Fire
detector may operate erroneously due to the heated air supplied during heating
operation.)

• When special chemical product may scatter around such as site chemical plants
and hospitals, full investigation is required before installing unit. (The plastic com­ponents may be damaged depending on the chemical product applied.)

• If the unit is run for long hours when the air above the ceiling is at high temperature/
high humidity (due point above 26 °C), due condensation may be produced in the
indoor unit. When operating the units in this condition, add insulation material (10­20 mm) to the entire surface of the indoor unit to avoid due condensation.

3.1. Install the indoor unit on a ceiling strong enough

to sustain its weight

[Fig. 3-1] (P.2)

A Access door B Electrical parts box
C Air inlet D Air outlet
E Ceiling surface
F Service space (viewed from the side)
G Service space (viewed from the direction of arrow)

1 600 mm or more 2 100 mm or more
3 10 mm or more 4 300 mm or more

* If the optional long-life filter is installed, the dimensions of the air conditioner

increase.

Rear inlet: Depth increases by 30 mm (*1)
Bottom inlet: Height increases by 30 mm (*2)

Warning:
The unit must be securely installed on a structure that can sustain its weight. If
the unit is mounted on an unstable structure, it may fall down causing injuries.

3.2. Securing installation and service space

• Select the optimum direction of supply airflow according to the configuration of the

room and the installation position.

• As the piping and wiring are connected at the bottom and side surfaces, and the

maintenance is made at the same surfaces, allow a proper space properly. For the
efficient suspension work and safety, provide a space as much as possible.

3.3. Outdoor unit

Ventilation and service space

■ SUZ-KA25VA
[Fig. 3-2] (P.2)

A 100 mm or more
B 350 mm or more
C Basically open 100 mm or more without only obstruction in front and on both sides of the

unit.

D 200 mm or more (Open two sides of left, right, or rear side.)

When the piping is to be attached to a wall containing metals (tin plated) or metal
netting, use a chemically treated wooden piece 20 mm or thicker between the wall
and the piping or wrap 7 to 8 turns of insulation vinyl tape around the piping.

Units should be installed by licensed contractor accordingly to local code require­ment.

3.4. Indoor unit accessories

The unit is provided with the following accessories:

No. Name Quantity

1 Pipe cover (for refrigerant piping joint) Small diameter 1
2 Pipe cover (for refrigerant piping joint) Large diameter 1
3

Bands for temporary tightening of pipe cover and drain hose

4 Remote controller parts 1
5 Signal receiving unit 1
6 Signal receiving unit cable 1
7 Washer 8
8 Drain hose 1
9 Pipe cover (for Drain hose) short 1

6

4. Fixing hanging bolts

4.1. Fixing hanging bolts

[Fig. 4-1] (P.2)

A Center of gravity

(Give site of suspension strong structure.)

Hanging structure

• Ceiling: The ceiling structure varies from building to one another. For detailed infor­mation, consult your construction company.

Center of gravity and Product Weight

Model name

SEZ-KD25
SEZ-KD35
SEZ-KD50
SEZ-KD60
SEZ-KD71

W
625
625
625
625
625

L
752
952
952

1152
1152

5. Installing the unit

5.1. Hanging the unit body

ss

s Bring the indoor unit to an installation site as it is packed.

ss
ss

s To hang the indoor unit, use a lifting machine to lift and pass through the

ss

hanging bolts.

[Fig. 5-1] (P.2)

A Unit body
B Lifting machine

[Fig. 5-2] (P.2)

C Nuts (field supply)
D Washers (accessory)
E M10 hanging bolt (field supply)

• If necessary, reinforce the hanging bolts with anti-quake supporting members as
countermeasures against earthquakes.
* Use M10 for hanging bolts and anti-quake supporting members (field supply).

1 Reinforcing the ceiling with additional members (edge beam, etc.) must be re-

quired to keep the ceiling at level and to prevent the ceiling from vibrations.

2 Cut and remove the ceiling members.
3 Reinforce the ceiling members, and add other members for fixing the ceiling boards.

X
263
286
280
285
285

Y
351
448
437
527
527

106
104
104
104
104

Z

Product Weight (kg)

18
21
24
28
28

5.2. Confirming the unit’s position and fixing hanging
bolts

ss

s Use the gage supplied with the panel to confirm that the unit body and

ss

hanging bolts are positioned in place. If they are not positioned in place, it
may result in dew drops due to wind leak. Be sure to check the positional
relationship.

ss

s Use a level to check that the surface indicated by

ss

the hanging bolt nuts are tightened to fix the hanging bolts.

ss

s To ensure that drain is discharged, be sure to hang the unit at level using a

ss

level.

[Fig. 5-3] (P.2)

A Indoor unit’s bottom surface

AA

A is at level. Ensure that

AA

10

Caution:

Be sure to install the unit body at level.

6. Refrigerant piping work

6.1. Refrigerant pipe

[Fig. 6-1] (P.3)

a Indoor unit
b Outdoor unit

Refer to the Instruction Manual that came with the outdoor unit for the restrictions on
the height difference between units and for the amount of additional refrigerant
charge.

Avoid the following places for installation where air conditioner trouble is liable to
occur.

• Where there is too much oil such as for machine or cooking.

• Salty environment as seaside areas.

• Hot-spring areas.

• Where sulfide gas exists.

• Other special atmospheric areas.

• This unit has flared connections on both indoor and outdoor sides. (Fig. 6-1)

• Refrigerant pipes are used to connect the indoor and outdoor units as shown in the
figure below.

• Insulate both refrigerant and drainage piping completely to prevent condensation.

Piping preparation

• Refrigerant pipes of 3, 5, 7, 10 and 15 m are available as optional items.

(1) Table below shows the specifications of pipes commercially available.

Model

SEZ-

KD25

SEZ-

KD35

SEZ-

KD50

SEZ-

KD60

SEZ-

KD71

Pipe

For liquid

For gas

For liquid

For gas

For liquid

For gas

For liquid

For gas

For liquid

For gas

Outside diameter

mm inch

6.35 1/4

9.52 3/8

6.35 1/4

9.52 3/8

6.35 1/4

12.7 1/2

6.35 1/4

15.88 5/8

9.52 3/8

15.88 5/8

Min wall

thickness

0.8 mm

0.8 mm

0.8 mm

0.8 mm

0.8 mm

0.8 mm

0.8 mm

1.0 mm

0.8 mm

1.0 mm

Insulation
thickness

8 mm
8 mm
8 mm
8 mm
8 mm
8 mm
8 mm
8 mm
8 mm
8 mm

(2) Ensure that the 2 refrigerant pipes are well insulated to prevent condensation.

(3) Refrigerant pipe bending radius must be 10 cm or more.

Caution:
Using careful insulation of specified thickness. Excessive thickness prevents
storage behind the indoor unit and smaller thickness causes dew drippage.

Insulation

material

Heat resisting

foam plastic

0.045 specific
gravity

6.2. Flaring work

• Main cause of gas leakage is defect in flaring work.
Carry out correct flaring work in the following procedure.

6.2.1. Pipe cutting

[Fig. 6-3] (P.3)

a Copper tubes
b Good
c No good
d Tilted
e Uneven
f Burred

• Using a pipe cutter cut the copper tube correctly.

6.2.2. Burrs removal

[Fig. 6-4] (P.3)

a Burr
b Copper tube/pipe
c Spare reamer
d Pipe cutter

• Completely remove all burrs from the cut cross section of pipe/tube.

• Put the end of the copper tube/pipe to downward direction as you remove burrs in
order to avoid burrs drop in the tubing.

6.2.4. Flaring work

[Fig. 6-6] (P.3)

a Flaring tool
b Die
c Copper tube
d Flare nut
e Yo ke

• Carry out flaring work using flaring tool as shown below.

Dimension

Pipe diameter A (mm)

(mm)

When the tool for R410A is used

+0

B (mm)

-0.4

Clutch type

6.35 0 - 0.5 9.1

9.52 0 - 0.5 13.2

12.7 0 - 0.5 16.6

15.88 0 - 0.5 19.7

Firmly hold copper tube in a die in the dimension shown in the table at above.

6.2.5. Check

[Fig. 6-7] (P.3)

a Smooth all around f Scratch on flared plane
b Inside is shining without any scratches g Cracked
c Even length all around h Uneven
d Too much i Bad examples
e Tilted

• Compare the flared work with a figure in right side hand.

• If flare is noted to be defective, cut off the flared section and do flaring work again.

6.3. Pipe connection

[Fig. 6-8] (P.3)

• Apply a thin coat of refrigeration oil on the seat surface of pipe.

• For connection first align the center, then tighten the first 3 to 4 turns of flare nut.

• Use tightening torque table below as a guideline for indoor unit side union joint section,
and tighten using two wrenches. Excessive tightening damages the flare section.

Copper pipe O.D. Flare nut O.D. Tightening torque

(mm) (mm) (N·m)
ø6.35 17 14 - 18
ø9.52 22 34 - 42
ø12.7 26 49 - 61

ø15.88 29 68 - 82

Warning:
Be careful of flying flare nut! (Internally pressurized)
Remove the flare nut as follows:

1. Loosen the nut until you hear a hissing noise.

2. Do not remove the nut until the gas has been completely released (i.e., hiss-

ing noise stops).

3. Check that the gas has been completely released, and then remove the nut.

Outdoor unit connection

Connect pipes to stop valve pipe joint of the outdoor unit in the same manner applied
for indoor unit.

• For tightening use a torque wrench or spanner, and use the same tightening torque

applied for indoor unit.

Refrigerant pipe insulation

• After connecting refrigerant piping, insulate the joints (flared joints) with thermal

insulation tubing as shown below.

[Fig. 6-9] (P.3)

A Pipe cover (small) (accessory)
B Caution:

Pull out the thermal insulation on the refrigerant piping at the site, insert the flare nut to flare
the end, and replace the insulation in its original position.

Take care to ensure that condensation does not form on exposed copper piping.

C Liquid end of refrigerant piping D Gas end of refrigerant piping
E Site refrigerant piping F Main body
G Pipe cover (large) (accessory) H Thermal insulation (field supply)
I Pull J Flare nut
K Return to original position L Ensure that there is no gap here
M Plate on main body N Band (accessory)
O Ensure that there is no gap here. Place join upwards.

6.2.3. Putting nut on

[Fig. 6-5] (P.3)

a Flare nut
b Copper tube

• Remove flare nuts attached to indoor and outdoor unit, then put them on pipe/tube
having completed burr removal.
(not possible to put them on after flaring work)

11

6. Refrigerant piping work

1.Remove and discard the rubber bung which is inserted in the end of the unit piping.

2.Flare the end of the site refrigerant piping.

3.Pull out the thermal insulation on the site refrigerant piping and replace the insula­tion in its original position.

Cautions On Refrigerant Piping

ss

s Be sure to use non-oxidative brazing for brazing to ensure that no foreign

ss

matter or moisture enter into the pipe.

ss

s Be sure to apply refrigerating machine oil over the flare connection seating

ss

surface and tighten the connection using a double spanner.

ss

s Provide a metal brace to support the refrigerant pipe so that no load is

ss

imparted to the indoor unit end pipe. This metal brace should be provided
50 cm away from the indoor unit’s flare connection.

Pipe length :

7 m maximum

No gas charge is needed.

Pipe length exceeding 7 m

Charge the prescribed

amount of gas.

Tighten the cap to the service port to obtain the initial status.

Retighten the cap

Leak test

6.4. Purging procedures leak test

PURGING PROCEDURES

Connect the refrigerant pipes (both the liquid and gas pipes) between the indoor
and the outdoor units.

Remove the service port cap of the stop valve on the side of the outdoor unit gas pipe.
(The stop valve will not work in its initial state fresh out of the factory (totally closed
with cap on).)

Connect the gage manifold valve and the vacuum pump to the service port of the
stop valve on the gas pipe side of the outdoor unit.

Run the vacuum pump. (Vacuumize for more than 15 minutes.)

Check the vacuum with the gage manifold valve, then close the gage manifold valve,
and stop the vacuum pump.

Leave it as is for one or two minutes. Make sure the pointer of the gage manifold
valve remains in the same position. Confirm that the pressure gage show -0.101MPa
(-760 mmHg).

Handle
Low

Window

Adapter for
preventing
the back flow

Compound pressure
gauge (for R410A)

Pressure gauge
(for R410A)

Gauge manifold
valve (for R410A)

Handle High
Charge hose

(for R410A)

Vacuum

(or the vacuum

pump

pump with the
function to
prevent the back
flow)

-0.101MPa
(-760 mmHg)

Stop
valve

Charge hose
(for R410A)

*Close

*Open

Hexagonal wrench

*4 to 5 turns

Stop valve

Stop valve

Service port

Remove the gage manifold valve quickly from the service port of the stop valve.

After refrigerant pipes are connected and evacuated, fully open all stop valves on
gas and liquid pipe sides.
Operating without fully opening lowers the performance and causes trouble.

6.5. Drain piping work

• Ensure that the drain piping is downward (pitch of more than 1/100) to the outdoor
(discharge) side. Do not provide any trap or irregularity on the way. (1)

• Ensure that any cross-wise drain piping is less than 20 m (excluding the difference
of elevation). If the drain piping is long, provide metal braces to prevent it from
waving. Never provide any air vent pipe. Otherwise drain may be ejected.

• Use a hard vinyl chloride pipe O.D. ø32 for drain piping.

• Ensure that collected pipes are 10 cm lower than the unit body’s drain port as
shown in 2.

• Do not provide any odor trap at the drain discharge port.

• Put the end of the drain piping in a position where no odor is generated.

• Do not put the end of the drain piping in any drain where ionic gases are generated.

[Fig. 6-10] (P.3)

A Downward slope 1/100 or more
B Connection dia. R1 external thread
C Indoor unit
D Collective piping
E Maximize this length to approx. 10 cm

1.Insert the drain hose (accessory) into the drain port.
(The drain hose must not be bent more than 45° to prevent the hose from breaking
or clogging.)
The connecting part between the indoor unit and the drain hose may be discon­nected at the maintenance. Fix the part with the accessory band, not be adhered.

2.Attach the drain pipe (O.D. ø32 PVC TUBE, field supply).
(Attach the pipe with glue for the hard vinyl chloride pipe, and fix it with the band
(small, accessory).)

3.Perform insulation work on the drain pipe (O.D. ø32 PVC TUBE) and on the socket
(including elbow).

[Fig. 6-11] (P.3)

A Indoor unit
B Pipe cover (short) (accessory)
C Tie band (accessory)
D Band fixing part
E Insertion margin
F Drain hose (accessory)
G Drain pipe (O.D. ø32 PVC TUBE, field supply)
H Insulating material (field supply)
I Max.145 ± 5 mm

7. Duct work

• When connecting ducts, insert a canvas duct between the main body and the duct.

• Use non-combustible duct components.

Caution:

• The noise from the intake will increase dramatically if intake
directly beneath the main body. Intake

AA

A should therefore be installed as

AA

AA

A is fitted

AA

far away from the main body as possible.
Particular care is required when using it with bottom inlet specifications.

• Install sufficient thermal insulation to prevent condensation forming on
outlet duct flanges and outlet ducts.

• To connect the air conditioner main body and the duct for potential equali­zation.

12

• Keep the distance between the inlet grille and the fan over 850 mm.
If it is less than 850 mm, install a safety guard not to touch the fan.

[Fig. 7-1] (P.4)

A Air inlet
B Air outlet
C Access door
D Ceiling surface
E Canvas duct
F Air filter
G Inlet grille

8. Electrical work

8.1. Power supply

Electrical specification Input capacity Main Switch/Fuse (A)

Power supply

SEZ-KD25 SEZ-KD35 SEZ-KD50 SEZ-KD60 SEZ-KD71

(1 phase ~/N, 230V, 50Hz) 10 10 20 20 20

Warning:

• The compressor will not operate unless the power supply phase connection
is correct.

• Grounding protection with a no-fuse breaker (earth leakage breaker [ELB]) is
usually installed for

DD

D.

DD

• The connection wiring between the outdoor and indoor units can be extended
up to a maximum of 50 meters, and the total extension including the crosso­ver wiring between rooms is a maximum of 80 m.

A switch with at least 3 mm contact separation in each pole shall be provided
by the air conditioner installation.
* Label each breaker according to purpose (heater, unit etc.).

[Fig. 8-1] (P.4)

A Indoor unit
B Outdoor unit
C Signal receiving unit
D Wireless remote controller
E Main switch/fuse
F Grounding

8.2. Indoor wire connection

Work procedure

1.Remove 2 screws to detach the electric component cover.

2.Route each cable through the wiring intake into the electric component box. (Pro­cure power cable and in-out connecting cable locally and use remote control cable
supplied with the unit.)

3.Securely connect the power cable and the in-out connecting cable and the remote
control cable to the terminal blocks.

4.Secure the cables with clamps inside the electric component box.

5.Attach the electric component cover as it was.

• Fix power supply cable and indoor/outdoor cable to control box by using buffer
bushing for tensile force. (PG connection or the like.)

Warning:

• Attach the electrical part cover securely. If it is attached incorrectly, it could
result in a fire, electric shock due to dust, water, etc.

• Use the specified indoor/outdoor unit connecting wire to connect the indoor
and outdoor units and fix the wire to the terminal bed securely so that no
stress is applied to the connecting section of the terminal bed. Incomplete
connection or fixing of the wire could result in a fire.

[Fig. 8-2-1] (P.4)

A Screw holding cover (2 pcs)
B Cover

[Fig. 8-2-2] (P.4)

A Terminal bed box
B Knockout hole
C Remove

[Fig. 8-2-3] (P.4)

E Use PG bushing to keep the weight of the cable and external force from being applied to the

power supply terminal connector. Use a cable tie to secure the cable.

F Power source wiring
G Tensile force
H Use ordinary bushing
I Signal receiving unit wiring

[Fig. 8-2-4] (P.4)

J Terminal bed for power source and indoor transmission
K To 1-phase power source
L Connecting the signal receiving unit

Connect the signal receiving unit to the CN90 (Connect to the wireless remote controller
board) on the indoor unit using the supplied remote controller wire. Connect the signal re­ceiving units to all the indoor units.

• Perform wiring as shown in the diagram to the lower left. (Procure the cable locally.)
Make sure to use cables of the correct polarity only.

[Fig. 8-3] (P.5)

A Indoor terminal block
B Earth wire (green/yellow)
C Indoor/outdoor unit connecting wire 3-core 1.5 mm2 or more
D Outdoor terminal block
E Power supply cord : 2.0 mm2 or more
F Indoor controller board
1 Connecting cable

Cable 3-core 1.5 mm2, in conformity with Design 245 IEC 57.

2 Indoor terminal block
3 Outdoor terminal block
4 Always install an earth wire (1-core 1.5 mm2) longer than other cables

5 Signal receiving unit cable (accessory) (wire length : 5 m)
6 Signal receiving unit
7 Power supply cord

Cable 3-core 2.0 mm2 or more, in conformity with Design 245 IEC 57.

• Connect the terminal blocks as shown in the diagram below.

Caution:

• Use care not to make mis-wiring.

• Firmly tighten the terminal screws to prevent them from loosening.

• After tightening, pull the wires lightly to confirm that they do not move.

8.3. Remote controller

8.3.1. For wireless remote controller

1) Installing procedures

(1) Select an installing position for the remote controller.
The temperature sensors are located on both remote controller and indoor unit.

s Procure the following parts locally:

Two piece switch box
Thin copper conduit tube
Lock nuts and bushings

(2) Seal the service entrance for the remote controller cord with putty to prevent pos-

sible invasion of dew drops, water, cockroaches or worms.

[Fig. 8-4] (P.5)

A For installation in the switch box:
B For direct installation on the wall select one of the following:

• Prepare a hole through the wall to pass the remote controller cord (in order to run the remote
controller cord from the back), then seal the hole with putty.

• Run the remote controller cord through the cut-out upper case, then seal the cut-out notch
with putty similarly as above.

C Wall G Switch box
D Conduit H Remote controller cord
E Lock nut I Seal with putty
F Bushing

B-1. To lead the remote controller cord from the back of the controller:
B-2. To run the remote controller cord through the upper portion:

(3) For direct installation on the wall

8.3.2. Signal Receiving Unit

1) Sample system connection
[Fig. 8-5] (P.5)

Only the wiring from the signal receiving unit and between the remote controllers is
shown in Fig. 8-5. The wiring differs depending on the unit to be connected or the
system to be used.
For details on restrictions, refer to the installation manual or the service handbook
that came with the unit.

1. Connecting to Mr. SLIM air conditioner

(1) Standard 1:1

1 Connecting the signal receiving unit

Connect the signal receiving unit to the CN90 (Connect to the wireless re­mote controller board) on the indoor unit using the supplied remote controller
wire. Connect the signal receiving units to all the indoor units.

2) Setting the pair number switch
[Fig. 8-6] (P.5)

1. Setting method

Assign the same pair number to the wireless remote controller as that of the indoor
unit. If not doing so, the remote controller cannot be operated. Refer to the instal­lation manual that came with the wireless remote controller for how to set pair
numbers of wireless remote controllers.
Position of daisy wire on the controller circuit board on the indoor unit.

13

8. Electrical work

For pair number settings, the following 4 patters (A-D) are available.

Pair number setting pattern

A
B
C
D

Pair number on remote controller side

3~9

Indoor controller circuit board side

0

Point where the daisy wire is disconnected

1
2

Not disconnected
J41 disconnected
J42 disconnected

J41 and J42 disconnected

2. Setting example

(1) To use the units in the same room

[Fig. 8-7] (P.5)

1 Separate setting

Assign a different pair number to each indoor unit to operate each indoor unit
by its own wireless remote controller.

[Fig. 8-8] (P.5)

2 Single setting

Assign the same pair number to all the indoor units to operate all the indoor
units by a single wireless remote controller.

[Fig. 8-9] (P.5)

(2) To use the units in different rooms

Assign the same pair number to the wireless remote controller as that of the
indoor unit. (Leave the setting as it is at purchase.)

3) How To Install
[Fig. 8-10] (P.6) to [Fig. 8-19] (P.7)

1. Common items for “Installation on the ceiling” and “Installation on the switch
box or on the wall”

[Fig. 8-10] (P.6)

A Signal receiving unit external E 6.5 mm (1/4 inch)
B Center of Switch box F 70 mm (2 - 3/4 inch)
C Switch box G 83.5 ± 0.4 mm (3 - 9/32 inch)
D Installation pitch H Protrusion (pillar, etc)

[Fig. 8-11] (P.6)

A Remote controller wire
B Hole (drill a hole on the ceiling to pass the remote controller wire.)
C Signal Receiving Unit

(1) Select the installation site.

The following must be observed.

1 Connect the signal receiving unit to the indoor unit with the supplied remote

controller wire. Note that the length of the remote controller wire is 5 m (16 ft).
Install the remote controller within the reach of the remote controller wire.

2 When installing on either the switch box or the wall, allow space around the

Signal Receiving Unit as shown in the figure in [Fig. 8-10].

°

3 When installing the Signal Receiving Unit to the switch box, the Signal Re-

ceiving Unit slipped downward for 6.5 mm (1/4 inch) as right illustrated.

4 Parts which must be supplied on site.

Switch box for one unit
Thin-copper wiring pipe
Lock nut and bushing

5 The thickness of the ceiling to which the remote controller is installed must be

between 9 mm (3/8 inch) and 25 mm (1 inch).

6 Install the unit on the ceiling or on the wall where the signal can be received

from the wireless remote controller.
The area where the signal from the wireless remote controller can be re­ceived is 45 ° and 7 m (22 ft) away from the front of the signal receiving unit.

7 Install the signal receiving unit to the position depending on the indoor unit

model.

8 Connect the remote controller wire securely to the order wire. To pass the

remote controller wire through the conduit, follow the procedure as shown in
Fig. 8-12.

[Fig. 8-12] (P.6)

A Fix tightly with tape. C Order wire
B Remote controller wire

Note:

• The point where the remote controller wire is connected differs depending
on the indoor unit model.
Take into account that the remote controller wire cannot be extended when
selecting the installation site.

• lf the Signal Receiving Unit is installed near a fluorescent lamp specially
inverter type,signal interception may occur.
Be careful for installing the Signal Receiving Unit or replacing the lamp.

(2) Seal the Signal Receiving Unit cord lead-in hole with putty in order to

prevent the possible entry of dew, water droplets, cockroaches, other in­sects, etc.

[Fig. 8-15] (P.6)

A 150 mm (5 - 15/16 inch)
B Remote controller wire (Accessory)
C Wiring pipe
D Locknut
E Bushing
F Switch box
G Seal around here with putty

• When installing on the switch box, seal the connections between the switch
box and wiring pipe with putty.

[Fig. 8-15] (P.6)

H Seal around here with putty
I Remote controller wire
J Seal around here with putty

• When opening a hole using a drill for Signal Receiving Unit wire (or taking the
wire out of the back of the Signal Receiving Unit), seal that hole with putty.

• When routing the wire via the portion cut off from the upper case, equally seal
that portion with putty.

(3) Install the remote control wire to the terminal block. (Fig. 8-16)
(4) Installing hole when the Signal Receiving Unit is installed on the wall

direct. (Fig. 8-17)

• Cut the thin-wall portion inside the bottom case (oblique section) by a knife or a
nipper.

• Take out the connected remote controller wire to the terminal brock through
this space.

(5) Install the lower case on the switch box or directly on the wall. (Fig. 8-18)

Mounting the cover (Fig. 8-19)

Caution:

• Insert the cover securely until the clicking sound is made. If not doing so, the
cover may fall.

8.4. Outdoor unit

[Fig. 8-20] (P.7)

• Connect cable from the indoor unit correctly on the terminal-block.

• Use the same terminal block and polarity as is used with the indoor unit.

• For aftercare maintenance, give extra length to connecting cable.

• Both end of connecting cable (extension wire) are peeled off. When too long,
or connected by cutting off the middle, peel off power supply cable to the size
given in the figure.

• Be careful not to contact connecting cable with piping.

[Fig. 8-21] (P.7)

A Loosen terminal screw
B Terminal block
C Lead wire

Caution:

• Use care not to make mis-wiring. (Fig. 8-21)

• Firmly tighten the terminal screws to prevent them from loosening.

• After tightening, pull the wires lightly to confirm that they do not move.

Warning:

• Be sure to attach the service panel of the outdoor unit securely. If it is not
attached correctly, it could result in a fire or an electric shock due to dust,
water, etc.

• Tighten terminal screws securely.

• Wiring should be done so that the power lines are not subject to tension.
Otherwise, heat may be generated or fire may occur.

2. Installation on the switch box or on the wall
(1) Use the remote controller wire to connect it to the connector (CN90) on

the controller circuit board on the indoor unit.

Refer to the 2) Setting the Pair Number Switch for details on controller circuit
board on the indoor unit.

14

8. Electrical work

8.5. Function settings

8.5.1 Function setting on the unit (Selecting the unit functions)

1) AUTO RESTART FUNCTION
For wireless remote controller only [Fig. 8-22] (P.8)

This model is equipped with the AUTO RESTART FUNCTION.
When the indoor unit is controlled with the remote controller, the operation mode, set
temperature, and the fan speed are memorized by the indoor controller board. The
auto restart function sets to work the moment the power has restored after power
failure, then, the unit will restart automatically.

8.5.2. Function setting on the unit (Selecting the unit functions)
[Fig. 8-22] (P.8)

Changing the power voltage setting

• Be sure to change the power voltage setting depending on the voltage used.

1 Go to the function select mode

Press the CHECK button F twice continuously.
(Start this operation from the status of remote controller display turned off.)

CHECK

is lighted and “00” blinks.
Press the TEMP button C once to set “50”. Direct the wireless remote controller
toward the receiver of the indoor unit and press the Hour button A.

2 Setting the unit number

Press the TEMP button C and D to set the unit number “00”. Direct the wireless
remote controller toward the receiver of the indoor unit and press the Minute
button B.

Function table

Select unit number 00

Mode
Power failure automatic recovery*1
(AUTO RESTART FUNCTION)
Indoor temperature detecting

LOSSNAY connectivity

Auto mode

Select unit numbers 01 to 03 or all units (AL [wired remote controller]/07 [wireless remote controller])

Mode
Filter sign

External static pressure

*1 When the power supply returns, the air conditioner will start 3 minutes later.

Settings
Not available
Available
Indoor unit operating average
Set by indoor unit’s remote controller
Remote controller’s internal sensor
Not Supported
Supported (indoor unit is not equipped with outdoor-air intake)
Supported (indoor unit is equipped with outdoor-air intake)
Energy saving cycle automatically enabled
Energy saving cycle automatically disabled

Settings
100 Hr
2500 Hr
No filter sign indicator
15 Pa
35 Pa
50 Pa
The same as setting of mode no.08
5 Pa (set mode no. 08 to 1)

3 Selecting a mode

Enter 04 to change the power voltage setting using the C and D buttons.
Direct the wireless remote controller toward the receiver of the indoor unit and
press the Hour button A.

4 Selecting the setting number

Use the C and D buttons to change the power voltage setting to 01 (240 V).
Direct the wireless remote controller toward the sensor of the indoor unit and
press the Hour button A.

5 To select multiple functions continuously

Repeat steps 3 and 4 to change multiple function settings continuously.

6 Complete function selection

Direct the wireless remote controller toward the sensor of the indoor unit and
press the ON/OFF button E.

Note:

• Whenever changes are made to the function settings after installation or main­tenance, be sure to record the changes with a mark in the “Setting” column of
the Function table.

8.5.3 Function setting on the remote controller

Refer to the indoor unit operation manual.

Current setting number: 1 = 1 beep (one second)

2 = 2 beeps (one second each)
3 = 3 beeps (one second each)

Mode no. Setting no. Initial setting Setting

01

02 2

03 2

05

Mode no. Setting no. Initial setting Setting

07 2

08 2

10

1 (*1)
2
1

3
1

3
1
2

1

3
1

3
1
2

9. Test run

9.1. Before test run

s After completing installation and the wiring and piping of the indoor and outdoor

units, check for refrigerant leakage, looseness in the power supply or control
wiring, wrong polarity, and no disconnection of one phase in the supply.

s Use a 500-volt megohmmeter to check that the resistance between the power

supply terminals and ground is at least 1.0 MΩ.

s Do not carry out this test on the control wiring (low voltage circuit) termi-

nals.

Warning:
Do not use the air conditioner if the insulation resistance is less than 1.0 MΩ.
Insulation resistance

After installation or after the power source to the unit has been cut for an extended
period, the insulation resistance will drop below 1 MΩ due to refrigerant accumulat­ing in the compressor. This is not a malfunction. Perform the following procedures.

1. Remove the wires from the compressor and measure the insulation resistance of

the compressor.

2. If the insulation resistance is below 1 MΩ, the compressor is faulty or the resist-

ance dropped due the accumulation of refrigerant in the compressor.

3. After connecting the wires to the compressor, the compressor will start to warm

up after power is supplied. After supplying power for the times indicated below,
measure the insulation resistance again.

• The insulation resistance drops due to accumulation of refrigerant in the com­pressor. The resistance will rise above 1 MΩ after the compressor is warmed
up for two to three hours.
(The time necessary to warm up the compressor varies according to atmos­pheric conditions and refrigerant accumulation.)

• To operate the compressor with refrigerant accumulated in the compressor,
the compressor must be warmed up at least 12 hours to prevent breakdown.

4. If the insulation resistance rises above 1 MΩ, the compressor is not faulty.

Caution:

• The compressor will not operate unless the power supply phase connection
is correct.

• Turn on the power at least 12 hours before starting operation.

- Starting operation immediately after turning on the main power switch can result in
severe damage to internal parts. Keep the power switch turned on during the op­erational season.

9.2. Test run

9.2.1. Using wireless remote controller

[Fig. 9-1] (P.8)

1 Turn on the power to the unit at least 12 hours before the test run.
2 Press the TEST RUN button A twice continuously.

(Start this operation from the status of remote controller display turned off.)

TEST RUN

and current operation mode are displayed.

3 Press the MODE button B to activate COOL mode, then check whether cool air

is blown out from the unit.

4 Press the MODE button B to activate HEAT mode, then check whether warm air

is blown out from the unit.

5 Press the FAN button C and check whether fan speed changes.
6 Press the VANE button D and check whether the auto vane operates properly.
7 Press the ON/OFF button to stop the test run.

Note:

• Point the remote controller towards the indoor unit receiver while following

• It is not possible to run the in FAN, DRY or AUTO mode.

steps

22

2 to

22

77

7.

77

15

9. Test run

[Output pattern A] Errors detected by indoor unit

Wireless remote controller

Beeper sounds/OPERATION

INDICATOR lamp flashes

(Number of times)

1
2
3
4
5
6
7
8

9
10
11
12

No sound

[Output pattern B] Errors detected by unit other than indoor unit (outdoor unit, etc.)

Wireless remote controller

Beeper sounds/OPERATION INDICATOR

lamp flashes (Number of times)

1
2
3
4
5
6
7
8
9

10

11

12
13
14

*1 If the beeper does not sound again after the initial two beeps to confirm the self-check start signal was received and the OPERATION INDICATOR lamp does not

come on, there are no error records.

*2 If the beeper sounds three times continuously “beep, beep, beep (0.4 + 0.4 + 0.4 sec.)” after the initial two beeps to confirm the self-check start signal was

received, the specified refrigerant address is incorrect.

• On wireless remote controller
The continuous buzzer sounds from receiving section of indoor unit.
Blink of operation lamp

• On wired remote controller
Check code displayed on the LCD.

Wired remote

controller

Check code

P1
P2, P9
E6, E7
P4
P5
P6
EE
P8
E4
–
–
Fb
– –

Symptom

Intake sensor error
Pipe (Liquid or 2-phase pipe) sensor error
Indoor/outdoor unit communication error
Drain sensor error
Drain pump error
Freezing/Overheating safeguard operation
Communication error between indoor and outdoor units
Pipe temperature error
Remote controller signal receiving error
–
–
Indoor unit control system error (memory error, etc.)
No corresponding

Symptom

Indoor/outdoor unit communication error (Transmitting error) (Outdoor unit)
Compressor overcurrent interruption
Open/short of outdoor unit thermistors
Compressor overcurrent interruption (When compressor locked)
Abnormal high discharging temperature/49C worked/ insufficient refrigerant
Abnormal high pressure (63H worked)/ Overheating safeguard operation
Abnormal temperature of heat sink
Outdoor unit fan protection stop
Compressor overcurrent interruption/Abnormal of power module
Abnormality of super heat due to low discharge temperature
Abnormality such as overvoltage or voltage shortage and abnormal
synchronous signal to main circuit/Current sensor error
–
–
Other errors (Refer to the technical manual for the outdoor unit.)

Remark

Remark

For details, check the LED
display of the outdoor controller
board.

• If the unit cannot be operated properly after the above test run has been performed, refer to the following table to remove the cause.

PLEASE WAIT

PLEASE WAIT → Error code

Display messages do not appear
even when operation switch is
turned ON (operation lamp does
not light up).

On the wireless remote controller with conditions above, following phenomena takes place.

• No signals from the remote controller are accepted.

• OPE lamp is blinking.

• The buzzer makes a short ping sound.

Note:
Operation is not possible for about 30 seconds after cancellation of function selection. (Correct operation)

For about 2 minutes
following power-on

After about 2 min­utes has expired

following power-on

Symptom

LED 1, 2 (PCB in outdoor unit)Wired remote controller
After LED 1, 2 are lighted, LED 2 is turned
off, then only LED 1 is lighted. (Correct
operation)

Only LED 1 is lighted. → LED 1, 2 blink.

Only LED 1 is lighted. → LED 1, 2 blinks
twice, LED 2 blinks once.

• For about 2 minutes after power-on, operation of the
remote controller is not possible due to system start-up.
(Correct operation)

• Connector for the outdoor unit’s protection device is not
connected.

• Reverse or open phase wiring for the outdoor unit’s power
terminal block (L1, L2, L3)

• Incorrect wiring between indoor and outdoor units
(incorrect polarity of S1, S2, S3)

• Remote controller wire short

16

Cause

9. Test run

For description of each LED (LED1, 2, 3) provided on the indoor controller, refer to the following table.

LED 1 (power for microcomputer)
LED 2 (power for remote controller)

LED 3 (communication between indoor and outdoor units)

Indicates whether control power is supplied. Make sure that this LED is always lit.
Indicates whether power is supplied to the remote controller. This LED lights only in the case of
the indoor unit which is connected to the outdoor unit refrigerant address “0”.
Indicates state of communication between the indoor and outdoor units. Make sure that this LED is
always blinking.

9.3. AUTO RESTART FUNCTION

Indoor controller board

This model is equipped with the AUTO RESTART FUNCTION.
When the indoor unit is controlled with the remote controller, the operation mode, set
temperature, and the fan speed are memorized by the indoor controller board. The
auto restart function sets to work the moment the power has restored after power
failure, then, the unit will restart automatically.
Set the AUTO RESTART FUNCTION using the wireless remote controller. (Mode
no.1).

10. Maintenance

10.1. Gas charge

[Fig. 10-1] (P.8)

A Indoor unit
B Union
C Liquid pipe
D Gas pipe
E Stop valve
F Outdoor unit
G Refrigerant gas cylinder operating valve
H Refrigerant gas cylinder for R410A with siphon
I Refrigerant (liquid)
J Electronic scale for refrigerant charging
K Charge hose (for R410A)
L Gauge manifold valve (for R410A)
M Service port

1. Connect gas cylinder to the service port of stop valve (3-way).

2. Execute air purge of the pipe (or hose) coming from refrigerant gas cylinder.

3. Replenish specified amount of refrigerant, while running the air conditioner
for cooling.

Note:

In case of adding refrigerant, comply with the quantity specified for the refrigerating
cycle.

Caution:

• Do not discharge the refrigerant into the atmosphere.
Take care not to discharge refrigerant into the atmosphere during installa­tion, reinstallation, or repairs to the refrigerant circuit.

• For additional charging, charge the refrigerant from liquid phase of the gas
cylinder.
If the refrigerant is charged from the gas phase, composition change may
occur in the refrigerant inside the cylinder and the outdoor unit. In this case,
ability of the refrigerating cycle decreases or normal operation can be impos­sible. However, charging the liquid refrigerant all at once may cause the com­pressor to be locked. Thus, charge the refrigerant slowly.

To maintain the high pressure of the gas cylinder, warm the gas cylinder with warm
water (under 40°C) during cold season. But never use naked fire or steam.

17

This product is designed and intended for use in the residential,

commercial and light-industrial environment.

The product at hand is
based on the following
EU regulations:

• Low Voltage Directive 2006/95/ EC

• Electromagnetic Compatibility Directive 89/

336/ EEC, 2004/108/ EC

Please be sure to put the contact address/telephone number on

this manual before handing it to the customer.

KB79H173H01

HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN