Toshiba RAS-07SKSX-1, RAS-09SKSX-1, RAS-07S2AX-1, RAS-09SASX-1 Service Manual

SERVICE MANUAL

AIR CONDITIONER

RAS-07SKSX-1 / RAS-07S2AX-1

FILE NO. SVM-08028

SPLIT WALL TYPE

RAS-09SKSX-1 / RAS-09SASX-1

April, 2008

CONTENTS

1. SPECIFICATIONS

2. CONSTRUCTION VIEWS

2-1 Indoor Unit
2-2 Outdoor Unit (RAS-07S2AX-1)
2-3 Outdoor Unit (RAS-09SASX-1)

3. WIRING DIAGRAM

4. SPECIFICATION OF ELECTRICAL PARTS

4-1 Indoor Unit
4-2 Outdoor Unit (RAS-07S2AX-1)
4-3 Outdoor Unit (RAS-09SASX-1)

5. REFRIGERATION CYCLE DIAGRAM

5-1 RAS-07SKSX-1 / RAS-07S2AX-1
5-2 RAS-09SKSX-1 / RAS-09SASX-1

6. CONTROL BLOCK DIAGRAM

FILE NO. SVM-08028

7. OPERATION DESCRIPTION

7-1 Outline of Air Conditioner Control
7-2 Description of Operation Circuit

Low-Temperature Limit Control

7-3
7-4 Auto Restart Function

8. INSTALLATION PROCEDURE

8-1 Safety Cautions
8-2 Installation Diagram of Indoor and Outdoor Units
8-3 Installation
8-4 Indoor Unit
8-5 Outdoor Unit
8-6 How to Set Remote Control Selector Switch
8-7 Others

9. TROUBLESHOOTING CHART

9-1 Troubleshooting Procedure
9-2 Basic Check Items
9-3 Primary Judgement
9-4 Self-Diagnosis by Remote Control (Check Code)
9-5 Troubleshooting Flowcharts
9-6 Troubleshooting for Remote Control (Including The Indoor P.C. Board)

− 1 −

10. PARTS REPLACEMENT

10-1 Indoor Unit
10-2 Outdoor Unit (RAS-07S2SX-1)

10-3 Outdoor Unit (RAS-09SASX-1)

11. EXPLODED VIEWS AND PARTS LIST

11-1

Indoor Unit (E-Parts Assy)

11-2 Indoor Unit

11-3 Outdoor Unit (RAS-07S2SX-1)
11-4 Outdoor Unit (RAS-09SASX-1)

FILE NO. SVM-08028

− 2 −

1. SPECIFICATIONS

FILE NO. SVM-08028

MO DE L

RAS-07SKSX-1 / RAS-07S2AX-1

IT E M Cooling

Capacity

Power source V 220 - 240

Power consumption kW 0.62 0.66 0.84 0.88

Power factor % 98 96 98 98

Running Indoor A 0.15

current Outdoor A 2.72 2.72 3.75 3.60
Starting current A 13 15
Moisture removal lit/h 0.5 1.2

Noise

Refrigerant

Refrigerant control Capillary tube

Interconnection

pipe

Indoor (H/M/L) dB 40/35/30 43/38/33
Outdoor dB 46 47 46 47

Name of refrigerant R22
Rated amount kg 0.58

Gas side size mm  

Connection type Flare connection

Liquid side size mm 6.35

Connection type Flare connection

Maximum length
(One way)

Maximum height
difference

kW 2.00 2.00 2.50 2.50

Phase 1

Hz 50

m

m

220V 240V 220V 240V

10

RAS-09SKSX-1 / RAS-09SASX-1

9.52

*1

5

INDOOR UNIT RAS-07SKSX-1 RAS-09SKSX-1

Height mm 250

Dimensions Width mm 740

Depth mm 185

Net weight kg

Evaporator type Finned tube

Indoor fan type Cross flow fan

High fan m3/h

Air volume

Fan motor output W 20

Air filter Honeycomb woven filter with PP frame

OUTDOOR UNIT RAS-07S2AX-1 RAS-09SASX-1

Dimensions Width mm 660

Net weight kg 25

Condenser type Finned tube

Outdoor fan type Propeller fan

Airflow volume m3/h

Fan motor output W 20 20

Compressor

Safety device

Louver type Automatic louver

Usable outdoor temperature range

Medium fan

Low fan

Height mm 530

Depth mm 240

Model PH108X1C-4DZDN2
Output W 605 780

m3/h

m3/h

1580

°C

510

430

350

1620 1720

Fuse, Overload relay

8

540

470

390

26

1640

QK164PBA

21 ~ 43

– 3 –

Note : 1

• Capacity is based on the following temperature conditions.

FILE NO. SVM-08028

Temperature

Indoor unit inlet air temperature

Outdoor unit inlet air temperature

Note : 2

*1 No need to charge extra refrigerant.

Condition

(DB) 27°C

(WB)

(DB) 35°C

(WB) 24°C

JIS C9612

Cooling

19°C

− 4 −

2. CONSTRUCTION VIEWS

FILE NO. SVM-08028

2-1. Indoor Unit

– 5 –

135

1654

Wireless remote control

2-2. Outdoor Unit

FILE NO. SVM-08028

C

L

C

L

280

− 6 −

400

3. WIRING DIAGRAM

FILE NO. SVM-08028

SINGLE PHASE

1∅220‑240V

50Hz



BRW
BLU
GRN&YEL

Heatexchanger

Heatexchanger
Sensor(TC)

Thermosensor(TA)

CN25

1

1

2

2

3

3

4

4

5

5

6

6

7

7

8

8

andindicationparts.

Infraredraysreceiver

WP‑017

WHI

BLK

GRN&YEL

CN01

N

1

1

22

CN03

1

1

2

2

CN12

BLU

1

1

BLU

2

2

BLU

3

3

BLU

4

4

BLU

5

5

BLU

6

6

BLU

7

7

WHI

8

8

F01

6.3A

250VAC

R62

CN31

4

C25

RY01

R63

21

3

BLK
P04

3

SG01

DSA

C26

L01

4

DB01

R64

C27

Switchingpowersupply

DC5V

Voltageregulator

12V

3

4

MCU

IC03

WP‑018

1

2

CN04

22

11

PNK

DC12V

C07

PNK

Tempfuse73C

CN07

1
22

3
44
55

CN11

1

2

3

CN10

5

33

1

WHI

1

1

1

YEL

22

YEL

3

3

3

YEL

44

YEL

55

YEL

1

GRY

2

BRW

3

WHI

5

BLK

RED

1

o

1
2
3
4
565

1
2
3
4

6

Louvermotor

ACmotor

Fanmotor

TERMINAL
BLOCK

OUTDOOR
TERMINAL
BLOCK

BLK

BLK

OVERLOAD RELAY

(L)

1

FAN MOTOR

BLK

(N)

2

RED

RED
WHI

COMPRESSOR

INDOOR

TERMINAL

CHASSIS

RED

CAPACITOR

PNK
WHI

BLOCK

1

BLK

INDOOR

OUTDOOR

CAPACITOR

GRN&YEL

2

WHI

FAN MOTOR

Type "A" Type "B"

− 7 −

FILE NO. SVM-08028

4. SPECIFICATION OF ELECTRICAL PARTS

4-1. Indoor Unit

No. Parts name Type Specifications

1 Fan motor (for indoor) AFS-220-20-4AR AC Motor with 145 °C thermo fuse
2 Thermo sensor (TA-sensor) 10k at 25 C
3 Switching power supply (T01)
4 Microcontroller unit (IC30) TMP87CM40ANG-6P68
5 Heat exchanger sensor

(TC-sensor)
6 Line filter (L01) LC*SS11V-06270 27mH, 600mA
7 Bridge rectifier (DB01) DB105G 1A, 600 V
8 Capacitor (C27) EKMH401VSN470MP20S 47mF, 400 V
9 Fuse (F01) BET6.3A 6.3A, 250VAC

10 Varistor (R62, R63) SR561K14DL 560 V
11 Resistor (R64)
12 Louver motor MP24ZCT 12VDC

ST-001

RF-2TK5R6

W

W

10k at 25 C

W

5.6 , 2 W

°

°

13 Relay (Comp., RY01) G4A-1A-E-CA Rating 20A/AC250 V, 12VDC

4-2. Outdoor Unit (RAS-07S2AX-1)

Specifications

Output (Rated) 605W, 2 poles, 1 phase, 220 - 240V~, 50Hz

PH108X1C-4DZDN2 Compressor1

WLF-240-20A

(Type "A")

Fan motor (for outdoor)2

SKF-240-20B

(Type "B")

Running capacitor

3

(for fan motor)

Running capacitor

4 RS44B256U0213S

(for compressor)

DS451155NPQB

Winding resistance (Ω)
(at 20ºC) 4.84 4.40
Output (Rated) 20 W, 6 poles, 1 phase, 220 - 240 V~, 50Hz
Winding resistance (Ω)
(at 20ºC) 410 435
Output (Rated) 20 W, 6 poles, 1 phase, 220 - 240 V, 50Hz
Winding resistance (Ω)
(at 20ºC) 235.2 260.1

AC 450 V~, 1.5µF

AC 440 V~, 25µF

C-R C-S

Red-Black White-Black

Red-Black White-Black

5 Overload relay U/T : 4

JMRA99208-9102

− 8 −

.2A (80ºC), Open : 135±5ºC, Close : 69±11ºC

4-3. Outdoor Unit (RAS-09SASX-1)

z

FILE NO. SVM-08028

No. Parts name Type

Output (Rated) 780W, 2 poles, 1 phase, 220 - 240 V~, 50H

Compressor1

Fan motor (for outdoor)2

Running capacitor

3

(for fan motor)
Running capacitor

4 RS44B356U0215S

(for compressor)

5 Overload relay U/T : 6.1A (80ºC), Open : 135±5ºC, Close : 75±11ºC

QK164PBA

WLF-240-20A

(Type "A")

SKF-240-20B

(Type "B")

DS451155NPQB

LPAP960B

Winding resistance (Ω)
(at 20ºC) 3.51 3.67
Output (Rated) 20 W, 6 poles, 1 phase, 220 - 240 V~, 50Hz
Winding resistance (Ω)
(at 20ºC) 410 435
Output (Rated) 20 W, 6 poles, 1 phase, 220 - 240 V, 50Hz
Winding resistance (Ω)
(at 20ºC) 235.2 260.1

AC 450 V~, 1.5µF

AC 440 V~, 35µF

Specifications

C-R C-S

Red-Black White-Black

Red-Black White-Black

− 9 −

5. REFRIGERATION CYCLE DIAGRAM

5-1. RAS-07SKSX-1 / RAS-07S2AX-1

FILE NO. SVM-08028

Indoor unit

Cooling

0.39m
(Connecting pipe)
∅9.52

O.D.:9.52mm O.D.:6.35mm

Cooling

Packed valve

Cooling

P

(∅9.52)

Compressor

PH108X1C-4DZD

Heat exchanger

Cross flow fan

N2

T1

0.49m
(Connecting pipe)
∅6.35

Packed valve

(∅6.35)

Capillary tube

∅1.2x500s

xchanger

Heat e

Refrigerant

58 kg.

R22 : 0.

Cooling

Propeller fan
Outdoor unit

Mark ( ) means check points of Gas Leak.

Ambient temp.

50Hz

Standard

pressure

(MPaG)

P

Surface temp. of heat

exchanger interchanging

pipe

T1

(°C)

Fan speed

(indoor)

conditions DB/WB

(°C)

Indoor Outdoor

Standard 0.57 13.0 High 27/19 35/24

Cooling Overload 0.68 17.5 High 32/23 43/26

Low temperature 0.42 4.0 Low 21/15 21/15

Note

• Measure the heat exchanger temperature at the center of U-bend. (By means of TC sensor)

– 10 –

5-2. RAS-09SKSX-1 / RAS-09SASX-1

FILE NO. SVM-08028

Indoor unit

Cooling

0.39m
(Connecting pipe)
∅9.52

O.D.:9.52mm O.D.:6.35mm

Cooling

Packed valve

Cooling

P

(∅9.52)

Compressor

QK164PBA

Heat exchanger

Cross flow fan

T1

Packed valve

(∅6.35)

Capillary tube

700s

∅1.5x

0.49m
(Connecting pipe)
∅6.35

Heat exchanger

Refrigerant

0.58

Cooling

Propeller fan
Outdoor unit

R22 :

Mark ( ) means check points of Gas Leak.

kg.

Ambient temp.

50Hz

Standard

pressure

(MPaG)

P

Surface temp. of heat

exchanger interchanging

pipe

T1

(°C)

Fan speed

(indoor)

conditions DB/WB

(°C)

Indoor Outdoor

Standard 0.50 11.0 High 27/19.5 35/24

Cooling Overload 0.60 15.0 High 32/23 43/26

Low temperature 0.40 2.2 Low 21/15 21/15

Note

• Measure the heat exchanger temperature at the center of U-bend. (By means of TC sensor)

– 11 –

Heat Exchange sensor

6. CONTROL BLOCK DIAGRAM

Main Unit Control Panel M.C.U.

Functions

FILE NO. SVM-08028

Operation

Display

Thermo. Sensor

Infrared Rays Signal Reciver

• Louver Control

•3-minutes Delay at Restart

for Compressor

Initiallizing Circuit

Clock Frequency
Oscillator Circuit

Power Supply

Circuit

Noise Filter Relay Driver, Louver Driver

•Motor Revolution Control

•Processing

(Temperature Processing)

•Timer

Compressor

ON/OFF

Signal

Relay

RY01

Timer

Display

Fan Only

Sign Display

Indoor Fan

Motor

Louver

ON/OFF

Signal

Louver

Motor

220-240 V~, 50Hz

REMOTE CONTROL

Compressor, Outdoor Fan Motor

Infrared Rays

Remote Control

Operation (START/STOP)

Operation Mode Selection

AUTO, COOL, DRY, AUTO FAN

Temperature Setting

Fan Speed Selection

ON TIMER Setting

OFF TIMER Setting

Louver Auto Swing

Louver Direction Setting

ECO

− 12 −

7. OPERATION DESCRIPTION

FILE NO. SVM-08028

7-1. Remote control

7-1-1. Function of Push Putton

Infrared signal emitter

1

2

Set louver button (FIX)

Auto Louver button (SWING)

3

Mode select button (MODE)

4

Reset button (RST)

5

On timer button (ON)

6

7

Off timer button (OFF)

Reserve button (SET)

8

Cancel button (CLR)

9

10

Check button (CHK)

11

ECO button (ECO)

12

Fan speed button (FAN)

13

Start/Stop button (START/STOP)

14

Temperature button ( )

1

MODE

AUTO

COOL

AUTO FAN

2

DRY

SWING

TEMP.

Hr.ON OFF

TEMP.

START/STOP

3

MODE

4
5

6

RST

TIMER

ON OFF SET CLR

7

FIX

CHK

FAN

AUTO

B

QUIET

14

13

FAN

12

ECO

11

10

9

8

− 13 −

FILE NO. SVM-08028

7-1-2. Display of Remote Control

All indications, except for the clock time indicator, are displayed by pressing the button.

1. Transmission mark

This transmission mark
remote controller transmits signals to the indoor
unit.

indicates when the

2. Mode indicator

Indicates the current operation mode.
(AUTO, COOL, DRY and AUTO FAN)

3. Temperature indicator

Indicates the temperature setting.
(17°C to 30°C)

4. ECO indicator

Indicates when the ECO is in activated.
Press the ECO button to start and press it again

to stop operate.

5. A, B change indicator remote controller

When the remote controller switching function is
set, "B" appears in the remote controller display

(When the remote controller seting is "A", there is
no indication at this position.)

1

3

2

7

6

6. Swing

Indicate when louver is swing.
Press swing button to start the swing operation

and press it again to stop the swing operation.

7. FAN speed indicator

Indicates the selected fan speed.
AUTO, QUIET or three fan speed levels

( LOW , MED , HIGH can be shown.
Indicate Auto will be appear with Dry operation
only.

8. ON/OFF TIMER indicator

Indicates when the ON/OFF TIMER operation.
(ON TIMER [Hr. ON], OFF TIMER [OFF]).

•

•

Hr.ON OFF

•

4

•

•

•

•

B

•

•

•

•

7

7

8

5

8

− 14 −

7-2. Outline of Air Conditioner Control

FILE NO. SVM-08028

This is a fixed capacity type air conditioner, which uses
a AC motor for an indoor fan. The AC motor drive
circuit is mounted in the indoor unit. And electrical
parts which operate the compressor and the outdoor
fan motor, are mounted in the outdoor unit.
The air conditioner is mainly controlled by the indoor
unit controller. The controller operates the indoor fan
motor based upon commands transmitted by the
remote control and transfers the operation commands
to the outdoor unit controller.
The outdoor unit receives operation commands from
the indoor unit, and operates the outdoor fan motor
and the compressor.

(1) Role of indoor unit controller

The indoor unit controller receives the operation
commands from the remote control and executes
them.

• Temperature measurement at the air inlet of the
indoor heat exchanger by the indoor

temperature sensor

• Temperature measurement of the indoor heat
exchanger by the heat exchanger sensor

• Louver motor control

• Indoor fan motor operation control

• LED display control

• Transferring of operation commands to the

outdoor unit

• Receiving of information of the operation status
and judging of the information or indication of
error

(2) Role of outdoor unit controller

The outdoor unit controller receives the operation
commands from the indoor controller and
executes them.

• Compressor operation
control

• Operation control of

outdoor fan motor

Operations according
to the commands
from the indoor unit

• Turning off the compressor and outdoor fan

when the outdoor unit receives the shutdown
command

7-2-1. Louver control

(1) Vertical air flow louver

Position of veritcal air flow louver is automatically
controlled according to the operation mode.
Besides, position of vertical air flow louver can be
arbitrarily set by pressing [FIX] button.
The louver position which is set by [FIX] button is
stored in the microcomputer, and the louver is
automatically set at the stored position for the next
operation.

(2) Swing

If [SWING] button is pressed when the indoor unit
is in operation, the vertical air flow louver starts
swinging. When [FIX] button is pressed, it stops
swinging.

7-2-2. Indoor Fan Control

The operation controls the fan speed at indoor unit
side. The indoor fan (cross flow fan) is operated by
the phase control induction motor. The fan rotates in 3
stages in MANUAL model, and in 5 stages in AUTO
mode, respectively. (Table 7-2-1)

1) When setting the fan speed to L, M or H on
the remote controller, the operation is performed
with the constant speed shown in Fig. 7-2-1.

Fig (7-2-1)

Indication

L

M

H

Fan speed

Low
Med

High

2) When setting the fan speed to AUTO on the remote
controller, revolution of the fan motor is controlled
to the fan speed level shown in Table 1 according to
the setup temperature, room temperature, and heat
exchanger temperature.

3) When setting the fan speed to QUIET on the remote
controller, revolution of the fan motor is controlled
to the fan speed level is L-.

Table 7-2-1 Indoor fan and air flow rate

OPERATION

MODE

RAS-07SKSX-1

Model

RAS-09SKSX-1

Cool
Dry
fan speed (rpm)
Air flow (m
fan speed (rpm)
Air flow (m3/h)

3

/h)

Fan speed level
UH H M+ M L+ L L- UL SUL
UH H M+ M L+ L L- UL SUL

1300 1300 1300 1300 1250 1150 1100 950 950 900 800 750 700 650 500

540 540 540 540 510 470 440 370

1350 1350 1350 1300 1250 1180 1140 1000 980 980 900 800 750 700 550

560 560 560 540 510 500 460 400

370 350 300 270 250 220 150

390 390 350 300 270 250 180

− 15 −

FILE NO. SVM-08028

7-3. Description of Operation Mode

(1) When turning on the breaker, the operation lamp

blinks. This means that the power is on (or the
power supply is cut off.)

(2) When pressing [ ] button on the

remote control, receiving beep sounds from the
indoor unit, and the next operation is performed
together with opening the vertical air flow louver.

(3) Once the operation mode is set, it is memorized in

the microcomputer so that the previous operation
can be effected thereafter simply by pressing
[ ] button.

7-3-1. Fan only operation

([MODE] button on the remote control is set
to the fan only operation.)

(1) When [FAN] button is set to AUTO, the indoor fan

motor operates as shown in Fig. 7-3-1. When
[FAN] button is set to LOW, MED, or HIGH
the motor operates with a constant air flow.

°C

7-3-2. Cooling operation

([MODE] button on the remote control is set
to the cooling operation.)

(1) The compressor, outdoor fan and operation

display lamp are controlled as shown in
Fig. 7-3-2.

°C

ON ON

OFF OFF ON

Compressor

Outdoor fan

-

(Room temp.) (Preset temp.)

Preset
temp.

0.5

0

Fig. 7-3-2

display

OPERATION

+3
+2.5
+2

+1.5
+1
+0.5

(Room temp.) − (Preset temp.)

Preset
temp.

0

(Preset temp.: 24 °C)

NOTE1 : *1 : Fan speed = (M + - L) x 3/4 + L

*2 : Fan speed = (M + - L) x 2/4 + L
*3 : Fan speed = (M + - L) x 1/4 + L

(Linear approximation
from M+ and L)

NOTE2 : ECO operation can not be set.

Fig. 7-3-1 Setting of air flow [FAN:AUTO]

M+

*1
*2
*3

(2) When [FAN] button is set to AUTO, the indoor fan

motor operates as shown in Fig. 7-3-5. When
[FAN] button is set to LOW, MED or HIGH
the motor operates with a constant air flow.

°C

(Room temp.) − (Preset temp.)

Preset
temp.

+3
+2.5
+2
+1.5
+1
+0.5

0

-0.5

M+

*1

*2
*3

NOTE1 : *1 : Fan speed = (M + - L) x 3/4 + L

*2 : Fan speed = (M + - L) x 2/4 + L
*3 : Fan speed = (M + - L) x 1/4 + L

(Linear approximation
from M+ and L)

Fig. 7-3-3 Setting of air flow [FAN:AUTO]

− 16 −

FILE NO. SVM-08028

7-3-3. Dry operation

([MODE] button on the remote control is set
to the dry operation.)

(1) The compressor, outdoor fan and operation

display on the remote control are controlled
as shown in Fig. 7-3-4.

°C

ON:6min.

OFF:4min.

ON:6min.

OFF:4min.

ON:5min.

ON:5min.

OFF:5min.

OFF

OFF

Compressor

ON

OFF:5min.

Outdoor fan

-

(Room temp.) (Preset temp.)

Preset
temp.

+3

+2

+1

0

Fig. 7-3-4

display

OPERATION

(1) One of 2 operations (Cooling or Fan only)

is selected according to difference between the
preset temperature and the room temperature at
which the automatic operation has started, as
shown in Fig. 7-3-6. The Fan only operation
continues until the room temperature reaches a
level at which another mode is selected.

(2) Temporary Auto

When the [RESET] button on the indoor unit
is pushed, the preset temperature is fixed at 24°C
and the indoor unit is controlled as shown in
Fig. 7-3-6.

°C

Cooling operation

0

-

Fan only operation

(2) The microcontroller turns the compressor on and

off at the regular intervals (4 to 6 minutes). While
the compressor is turning off, the indoor fan motor
operates in the SUPER LOW position.
The pattern of operation depending on the relation
between room temperature and preset
temperatures is shown in Fig. 7-3-5.

Room temp.

Preset temp.+1
Preset temp.

Compressor
Outdoor fan

Indoor fan

ON ON ON ON

OFF OFF OFF

L *SL SLLL SL L

*

Super Low

Fig. 7-3-5

(3) [FAN] button on the remote control is set to AUTO

only.

(Room temp.) (Preset temp.)

Fig. 7-3-6

7-4. Low-Temperature Limit Control

The microcontroller detects the indoor heat exchanger
temperature to prevent the indoor heat exchanger from
freezing.
The compressor and outdoor fan motor are controlled
as shown in Fig. 7-4-1

Heat exchanger
temperature

(°C)

5

2

Fig. 7-4-1

Compressor Outdoor fan

ON

Less than 2°C continues

for 5 minutes

OFF

(4) The ECO operation cannot be set.

7-3-4. Automatic operation

([MODE] button on the remote control is set
to the automatic operation.)

− 17 −

FILE NO. SVM-08028

7-5. Auto Restart Function

This indoor unit is equipped with an automatic restarting function which allows the unit to restart operating with
the set operating conditions in the ev ent of a power supply being accidentally shut down.
The operation will resume without warning three minutes after power is restored.

This function is not set to work when shipped from the factory. Therefore it is necessary to set it to work.

7-5-1. How to Set the Auto Restart Function

To set the auto restart function, proceed as follows:
The power supply to the unit must be on ; the function will not set if the power is off.
Press the [RESET] button located in the center of the front panel continuously f or three seconds.
The unit receives the signal and beeps three times.
The unit then restarts operating automatically in the event of power supply being accidentally shut down.

• When the unit is standby (Not operating)

Operation

Press [RESET] button for more than
three seconds. (Less than 10 seconds)

RESET button

• When the unit is in operation

Operation

Press [RESET] button for more than
three seconds. (Less than 10 seconds)

Motions

The unit is on standby.

↓

The unit starts to operate. The green indicator is on.

↓ After approx. three seconds,

The unit beeps three times The green indicator flashes
and continues to operate. for 5 seconds.

If the unit is not required to operate at this time, press [RESET]
button once more or use the remote controller to turn it off.

Motions

The unit is in operation. The green indicator is on.

↓

The unit stops operating. The g reen indicator is turned off.

↓ After approx. three seconds,

The unit beeps three times. The green indicator flashes

for 5 seconds.

If the unit is required to operate at this time, press [RESET] button
once more or use the remote controller to turn it on.

RESET button

• While the filter check indicator is on, the RESET button has the function of filter reset betton.

– 18 –

FILE NO. SVM-08028

7-5-2. How to Cancel the Auto Restart Function

To cancel auto restart function, proceed as follows :
Repeat the setting procedure : the unit receives the signal and beeps three times.
The unit will be required to be turned on with the remote controller after the main power supply is turned off.

• When the system is on stand-by (not operating)

Operation

Press [RESET] button for more than
three seconds. (Less than 10 seconds)

RESET button

• When the system is operating

Operation

Press [RESET] button for more than
three seconds. (Less than 10 seconds)

Motions

The unit is on standby.

↓

The unit starts to operate. The green indicator is on.

↓ After approx. three seconds,
The unit beeps three times and continues to operate.
If the unit is not required to operate at this time, press [RESET]

button once more or use the remote controller to turn it off.

Motions

The unit is in operation. The green indicator is on.

↓

The unit stops operating. The g reen indicator is turned off.

The unit beeps three times.
If the unit is required to operate at this time, press [RESET] button

once more or use the remote controller to turn it on.

RESET button

7-5-3. Power Failure During Timer Operation

When the unit is turned off because of power failure
during timer operation, the timer operation is can­celled. In that case, set the timer operation again.

NOTE :

The Everyday Timer is reset while a command signal
can be received from the remote controller even if it
stopped due to a power failure .

↓ After approx. three seconds,

– 19 –

FILE NO. SVM-08028

8. INSTALLATION PROCEDURE

8-1. Safety Cautions

For general public use

Power supply cord of parts of appliance for Outdoor use shall be at least polychloroprene sheathed flexible cord
(design H07 RN-F), or cord designation 245 IEC66.(Shall be installed in accordance with national wiring regulations.)

CAUTION

This appliance must be connected to the main power supply by means of a circuit breaker or a switch with a
contact separation of at least 3 mm in all poles.
If this is not possible, a power supply plug with earth must be used. This plug must be easily accessible after
installation. The plug must be disconnected from the power supply socket in order to disconnect the
appliance completely from the mains.

To Disconnect the Appliance from the Main Power Supply

DANGER

• FOR USE BY QUALIFIED PERSONS ONLY.

• TURN OFF MAIN POWER SUPPLY BEFORE ATTEMPTING ANY ELECTRICAL WORK. MAKE SURE

ALL POWER SWITCHES ARE OFF. FAILURE TO DO SO MAY CAUSE ELECTRIC SHOCK.

• CONNECT THE CONNECTING CABLE CORRECTLY. IF THE CONNECTING CABLE IS CONNECTED
WRONGLY, ELECTRIC PARTS MAY BE DAMAGED.

• CHECK THE EARTH WIRE THAT IT IS NOT BROKEN OR DISCONNECTED BEFORE INSTALLATION.

• DO NOT INSTALL NEAR CONCENTRATIONS OF COMBUSTIBLE GAS OR GAS VAPORS.

FAILURE TO FOLLOW THIS INSTRUCTION CAN RESULT IN FIRE OR EXPLOSION.

• TO PREVENT OVERHEATING THE INDOOR UNIT AND CAUSING A FIRE HAZARD, PLACE THE UNIT
WELL AWAY (MORE THAN 2 M) FROM HEAT SOURCES SUCH AS RADIATORS, HEATORS,
FURNACE, STOVES, ETC.

• WHEN MOVING THE AIR-CONDITIONER FOR INSTALLING IT IN ANOTHER PLACE AGAIN, BE VERY
CAREFUL NOT TO GET THE SPECIFIED REFRIGERANT (R410A) WITH ANY OTHER GASEOUS
BODY INTO THE REFRIGERATION CYCLE. IF AIR OR ANY OTHER GAS IS MIXED IN THE
REFRIGERANT, THE GAS PRESSURE IN THE REFRIGERATION CYCLE BECOMES ABNORMALLY
HIGH AND IT RESULTINGLY CAUSES BURST OF THE PIPE AND INJURIES ON PERSONS.

• IN THE EVENT THAT THE REFRIGERANT GAS LEAKS OUT OF THE PIPE DURING THE
INSTALLATION WORK, IMMEDIATELY LET FRESH AIR INTO THE ROOM. IF THE REFRIGERANT GAS
IS HEATED BY FIRE OR SOMETHING ELSE, IT CAUSES GENERATION OF POISONOUS GAS.

WARNING

• Never modify this unit by removing any of the safety guards or bypassing any of the safety interlock
switches.

• Do not install in a place which cannot bear the weight of the unit.
Personal injury and property damage can result if the unit falls.

• Before doing the electrical work, attach an approved plug to the power supply cord.
Also, make sure the equipment is properly earthed.

• Appliance shall be installed in accordance with national wiring regulations.
If you detect any damage, do not install the unit. Contact your TOSHIBA dealer immediately.

CAUTION

• Exposure of unit to water or other moisture before installation could result in electric shock.
Do not store it in a wet basement or expose to rain or water.

• After unpacking the unit, examine it carefully for possible damage.

• Do not install in a place that can increase the vibration of the unit. Do not install in a place that can amplify

the noise level of the unit or where noise and discharged air might disturb neighbors.

• To avoid personal injury, be careful when handling parts with sharp edges.

• Please read this installation manual carefully before installing the unit. It contains further important

instructions for proper installation.

 − 20 − 

FILE NO. SVM-08028

REQUIREMENT OF REPORT TO THE LOCAL POWER SUPPLIER

Please make absolutely sure that the installation of this appliance is reported to the local power supplier
before installation. If you experience any problems, or if the installation is not accepted by the supplier, the
service agency will take adequate countermeasures.

Remark per EMC Directive 89/336/EEC

To prevent flicker impressions during the start of the compressor (technical process) following installation
conditions do apply.

1. The power connection for the air conditioner has to be done at the main power distribution. This distribution
has to be of an impedance.
Normally the required impedance is reached at a 32A fusing point. Air conditioner fuse has to be 16A max.!

2. No other equipment should be connected to this power line.

3. For detailed installation acceptance, please contact your power supplier whether its restriction does apply
for products like washing machines, air conditioners or electrical ovens.

4. For power details of the air conditioner, refer to the rating plate of the product.

 − 21 − 

8-2. Installation Diagram of Indoor and Outdoor Units

120 m

m or more

Hook

47 mm or more

1 Installation

plate

FILE NO. SVM-08028

For the rear left and left piping

Wall

(

A

t

t

a

5

Active Carbon-Catechin filter

Before installing the
wireless remote control

• With the remote control cover
open, load the batteries supplied
correctly, observing their
polarity.

2 Wireless remote control

3 Batteries

Hook

120 mm or more

Insert the cushion between
the indoor unit and wall, and
tilt the indoor unit for better
operation.

A

ir

f

ilt

e

r

Do not allow the drain hose to
get slack.

c

h

t

o

t

h

e

f

r

o

n

t

p

a

n

e

l

.)

Pan head wood screw

7

Shield pipe

Make sure to run the drain
hose sloped downward.

Cut the piping
hole sloped
slightly.

The auxiliary piping can be
connected to the left, rear left,
rear right, right, bottom right
or bottom left.

4 Remote control holder

Right

2 Wireless remote control

Rear right

Bottom
right

Rear
left

Insulate the refrigerant pipes
separately with insulation, not
together.

Left

Bottom left

Vinyl tape
Apply after carrying
out a drainage test.

45 mm or more

600 mm or more

10

0

mm o

r mor

e

e

r

o

m

r

o

m

m

0

0

4

Extension
drain hose

(Not available,
provided by
installer)

1

0

0

m

m

o

Saddle

r m

o

re

6 mm thick heat resisting
polyethylene foam

− 22 -

8-3. Installation

8-3-1. Optional installation parts

FILE NO. SVM-08028

Part

Code

Parts name

Refrigerant piping

A

Liquid side : ∅6.35 mm
Gas side : ∅ 9.52 mm

Pipe insulating material

B

(polyethylene foam, 6 mm thick)
Putty, PVC tapes

C

<Fixing bolt arrangement of outdoor unit>

500 mm

Air inlet

97 mm

53 mm

280 mm

Air outlet

Drain outlet

Fig. 8-3-1

Q'ty

One

each

1

One

each

• Secure the outdoor unit with fixing bolts and nuts if the unit is likely to be exposed to a strong wind.

• Use ∅8 mm or ∅10 mm anchor bolts and nuts.

− 23 −

8-3-2. Accessory and installation parts

FILE NO. SVM-08028

Part

No.

Part name (Q'ty)

1

Installation plate x 1

2

Wireless remote control x 1

Others

Owner’s manual

Installation manual

Name

Part

No.

Part name (Q'ty)

3

Battery x 2

4

Remote control holder x 1

Part

No.

Part name (Q'ty)

5

Active Carbon-Catechin filter x 2

6

Mounting screw ∅ 4 x 25 x 6

7

Pan head wood screw

∅ 3.1 x 16 x 2

l

l

− 24 −

FILE NO. SVM-08028

8-4. Indoor Unit

8-4-1. Installation place

• A place which provides the spaces around the
indoor unit as shown in the above diagram.

• A place where there is no obstacle near the air inlet
and outlet.

• A place that allows easy installation of the piping to
the outdoor unit.

• A place which allows the front panel to be opened.

CAUTION

• Direct sunlight to the indoor unit's wireless

receiver should be avoided.

• The microprocessor in the indoor unit should not

be too close to RF noise sources.
(For details, see the owner's manual.)

<Remote control>

• A place where there are no obstacles such as a
curtain that may block the signal from the indoor
unit.

• Do not install the remote control in a place exposed
to direct sunlight or close to a heating source, such
as a stove.

• Keep the remote control at least 1 m apart from the
nearest TV set or stereo equipment. (This is
necessary to prevent image disturbances or noise
interference.)

• The location of the remote control should be
determined as shown below.

Remote
control

(Top view)

Indoor unit

Reception
range

45

°

°

45

Remote control

Indoor unit

(Side view)

°

75

Reception
range

8-4-2. Cutting a hole and mounting installation

plate

<Cutting a hole>

When installing the refrigerant pipes from the rear.

90 mm

66 mm

Pipe hole

42 mm

65 mm

Fig. 8-4-2

1. After determining the pipe hole position on the
mounting plate (A), drill the pipe hole (∅65 mm) at
a slight downward slant to the outdoor side.

NOTE

• When drilling a wall that contains a metal lath, wire
lath or metal plate, be sure to use a pipe hole brim
ring sold separately.

<Mounting the installation plate>

35

55.5

1

Installation
plate

120

65

Pipe hole

Indoor unit

Hook

Hook

Thread

Weight

Hook

Pipe hole

Mounting screw

6

Fig. 8-4-1

Fig. 8-4-3

− 25 −

FILE NO. SVM-08028

<When the installation plate is directly mounted on
the wall>

1. Securely fit the installation plate onto the wall by
screwing it in the upper and lower parts to hook up
the indoor unit.

2. To mount the installation plate on a concrete wall
with anchor bolts, utilize the anchor bolt holes as
illustrated in the above figure.

3. Install the installation plate horizontally in the wall.

CAUTION

When installing the installation plate with a
mounting screw, do not use the anchor bolt hole.
Otherwise the unit may fall down and result in
personal injury and property damage.

Installation plate
<Keep horizontal direction>

Anchor
bolt

Projection

5 mm dia. hole

Clip anchor
(local parts)

Fig. 8-4-4

15 mm or less

6 Mounting

screw

ss

∅4 x 25

s

ss

8-4-3. Electrical work

1. The supply voltage must be the same as the rated
voltage of the air conditioner.

2. Prepare the power source for exclusive use with the
air conditioner.

CAUTION

• This appliance can be connected to the mains in
either of the following two ways.
(1) Connection to fixed wiring:

A switch or circuit breaker which disconnects
all poles and has a contact separation of at
least 3 mm must be incorporate in the fixed
wiring. An approved circuit breaker or
switches must used.

(2) Connection with power supply plug:

Attach power supply plug with power cord
and plug it into wall outlet. An approved
power supply cord and plug must be used.

NOTE

• Ensure all wiring is used within its electrical rating.

Model

Power source 50 Hz, 220 − 240 V Single phase

Maximum
running current

Plug socket &
fuse rating

Power cord

RAS-07,09SKSX-1

7.5A

16A

1 mm2 or more

CAUTION

Failure to firmly install the unit may result in
personal injury and property damage if the unit falls.

• In case of block, brick, concrete or similar type
walls, make 5 mm dia. holes in the wall.

• Insert clip anchors for appropriate
screws.

NOTE

• Secure four corners and lower parts of the
installation plate with 4 to 6 mounting screws to
install it.

6 mounting

− 26 −

<How to connect the connecting cable>





Wiring of the connecting cable can be carried out
without removing the front panel.

1. Remove the air inlet grille.
Open the air inlet grille upward and pull it toward
you.

2. Remove the terminal cover and cord clamp.

3. Insert the connecting cable (according to the local
cords) into the pipe hole on the wall.

4. Take out the connecting cable through the cable
slot on the rear panel so that it protrudes about
15 cm from the front.

5. Insert the connecting cable fully into the terminal
block and secure it tightly with screws.

6. Tightening torque : 1.2 N·m (0.12 kgf·m)

7. Secure the connecting cable with the cord clamp.

8. Fix the terminal cover, rear plate bushing and air
inlet grille on the indoor unit.

CAUTION

• Be sure to refer to the wiring system diagram

labeled inside the front panel.

• Check local electrical cords and also any specific

wiring instructions or limitations.

Connecting cable

about 15 cm

Stripping length of the connecting cable

FILE NO. SVM-08028

Terminal cover

Screw

Fig. 8-4-5

65 mm

10 mm

10 mm

50 mm

Cord clamp

Screw

Earth line

Terminal block





Earth line

Connecting cable

Fig. 8-4-6

NOTE

• Use stranded wire only.

• Wire type : H07 RN-F or more

<How to install the air inlet grille on the indoor unit>

• When attaching the air inlet grille, the contrary of
the removed operation is performed.

Fig. 8-4-7

− 27 −

FILE NO. SVM-08028

8-4-4. Piping and drain hose installation
<Piping and drain hose forming>

* Since dewing results in a machine trouble, make

sure to insulate both the connecting pipes. (Use
polyethylene foam as insulating material.)

Rear right

Rear left

Bottom left

Changing

Left
Bottom right
Right

Die-cutting

Front panel slit

drain hose

Piping preparation

1. Die-cutting Front panel slit

For leftward connection, cut out slit on the left side of
the front panel. (A knife will produce splinters, so use
nippers.)

2. Changing drain hose

For leftward connection, bottom leftward connection
and rear leftward connection’s piping, it is necessary to
change the drain hose and drain cap.

How to remove the drains cap

Clip drain cap by needle-nose plier, and pull out.

How to fix the drains cap

1) Insert hexagonal wrench (4 mm) in a center
head.

4 mm

Fig. 8-4-10

2) Firmly insert drains cap.

No gap

Do not apply lubricating oil
(refrigerant machine oil) when
inserting the drain cap.
Application causes deterioration

Insert a hexagon
wrench (4 mm)

and drain leakage of the plug.

Fig. 8-4-11

CAUTION

Firmly insert the drain hose and drain cap; otherwise,
water may leak.

<In case of right or left piping>

Fig. 8-4-8

How to install the drain hose

Firmly insert drain hose connecting part until hitting on
a heat insulator.

Heat insulator

Drain hose

Fig. 8-4-9

• After scribing slits of the front panel with a knife or a
making-off pin, cut them with a pair of nippers or an
equivalent tool.

Slit

Fig. 8-4-12

<In case of bottom right or bottom left piping>

• After scribing slits of the front panel with a knife or a
making-off pin, cut them with a pair of nippers or an
equivalent tool.

Slit

− 28 −

Fig. 8-4-13

FILE NO. SVM-08028

<Left-hand connection with piping>

Bend the connecting pipe so that it is laid within 43 mm
above the wall surface. If the connecting pipe is laid
exceeding 43 mm above the wall surface, the indoor
unit may unstably be set on the wall. When bending the
connecting pipe, make sure to use a spring bender so
as not to crush the pipe.

Bend the connection pipe within a radius of 30 mm.

To connect the pipe after installation of the unit (figure)

(To the forefront of flare)

210 mm

165 mm

R 30 mm (Use polisin (polyethylene)

43 mm

core or the like for bending pipe.)

0

8

Gas side

Liquid side

Outward form of indoor unit

Use the handle of screwdriver, etc.

Fig. 8-4-14

8-4-5. Indoor unit fixing

1. Pass the pipe through the hole in the wall, and hook
the indoor unit on the installation plate at the upper
hooks.

2. Swing the indoor unit to right and left to confirm that
it is firmly hooked up on the installation plate.

3. While pressing the indoor unit onto the wall, hook it
at the lower part on the installation plate. Pull the
indoor unit toward you to confirm that it is firmly
hooked up on the installation plate.

1

2

Hook

Hook here

1 Installation

plate

Press

(unhook)

Fig. 8-4-15

• For detaching the indoor unit from the installation

plate, pull the indoor unit toward you while pushing

its bottom up at the specified parts.

NOTE

If the pipe is bent incorrectly, the indoor unit may
unstably be set on the wall.
After passing the connecting pipe through the pipe
hole, connect the connecting pipe to the auxiliary pipes
and wrap the facing tape around them.

CAUTION

• Bind the auxiliary pipes (two) and connecting
cable with facing tape tightly. In case of leftward
piping and rear-leftward piping, bind the auxiliary
pipes (two) only with facing tape.

Indoor unit

Auxiliary pipes

Installation plate

• Carefully arrange pipes so that any pipe does not
stick out of the rear plate of the indoor unit.

• Carefully connect the auxiliary pipes and
connecting pipes to each other and cut off the
insulating tape wound on the connecting pipe to
avoid double-taping at the joint, moreover, seal
the joint with the vinyl tape, etc.

• Since dewing results in a machine trouble, make
sure to insulate both the connecting pipes. (Use
polyethylene foam as insulating material.)

• When bending a pipe, carefully do it, not to crush it.

Connecting cable

PushPush

Fig. 8-4-16

− 29 −

FILE NO. SVM-08028

8-4-6. Drainage

1. Run the drain hose sloped downwards.

NOTE

• Hole should be made at a slight downward slant on
the outdoor side.

Do not form the
Do not rise the
drain hose.

50 mm
or more

Do not put
the drain
hose end
into water.

Fig. 8-4-

drain hose into

a wavy shape.

17

Do not put
the drain
hose end in
the drainage
ditch.

2. Put water in the drain pan and make sure that the
water is drained out of doors.

3. When connecting extension drain hose, insulate the
connecting part of extension drain hose with shield
pipe.

Shield pipe

Drain hose

Inside the room

Fig. 8-4-

Extension drain hose

18

CAUTION

Arrange the drain pipe for proper drainage from the
unit.
Improper drainage can result in dew-dropping.

This air conditioner has the structure designed to drain
water collected from dew, which forms on the back of
the indoor unit, to the drain pan.
Therefore, do not store the power cord and other parts
at a height above the drain guide.

8-5. Outdoor Unit

8-5-1. Installation place

• A place which provides the spaces around the
outdoor unit as shown in the left diagram.

A place which can bear the weight of the outdoor

•

unit and does not allow an increase in noise level
and vibration.

A place where the operation noise and discharged

•

air do not disturb your neighbors.

A place which is not exposed to a strong wind.

•

A place free of a leakage of combustible gases.

•

A place which does not block a passage.

•

When the outdoor unit is to be installed in an

•

elevated position, be sure to secure its feet.

An allowable length of the connecting pipe is up to

•

10 m.

An allowable height level is up to 5 m.

•

• A place where the drain water does not raise any

problem.

CAUTION

1. Install the outdoor unit without anything blocking
the air discharging.

2. When the outdoor unit is installed in a place
exposed always exposed to strong wind like a
coast or on a high storey of a building, secure
the normal fan operation using a duct or a wind
shield.

3. In particularly windy areas, install the unit such
as to avoid admission of wind.

4. Installation in the following places may result in
trouble.
Do not install the unit in such places.

A place full of machine oil.

•

A saline-place such as the coast.

•

A place full of sulfide gas.

•

A place where high-frequency waves are likely

•

to be generated as from audio equipment,
welders, and medical equipment.

Space for pipes

Fig. 8-4-

19

Wall

Drain guide

− 30 −

Strong

wind

Fig. 8-5-1

FILE NO. SVM-08028

8-5-2. Refrigerant piping connection

1. Cut the pipe with a pipe cutter.

90°

Obliquity

Roughness Warp

Fig. 8-5-2

2. Insert a flare nut into the pipe, and flare the pipe.

• Projection margin in flaring : A (Unit : mm)

A

Die

Pipe

Fig. 8-5-3

Outer dia.

of copper pipe

Rigid Imperial

A

(Unit : N·m)

Outer dia.

of copper pipe

∅

6.35

16 to 18 (1.6 to 1.8 kgf·m)

Tightening torque

∅9.52 30 to 42 (3.0 to 4.2 kgf·m)

• Tightening torque of flare pipe connections

Flare at indoor unit side

Flare at outdoor unit side

Fig. 8-5-4

6.35 0.5 to 1.0 1.0 to 1.5

9.52 0.5 to 1.0 1.0 to 1.5

<Tightening connection>

Align the centers of the connecting pipes and tighten
the flare nut as far as possible with your fingers. Then
tighten the nut with a spanner and torque wrench as
shown in the figure.

CAUTION

• Do not apply excess torque.

• Otherwise, the nut may crack depending on the

conditions.

Externally
threaded side

Use a wrench to secure.

Mark line

Fig. 8-5-5

Flare nutHalf union

Internally
threaded side

Use a torque wrench to tighten.

Fig. 8-5-6

CAUTION

•

KEEP IMPORTANT 4 POINTS FOR PIPING WORK

(1) Take away dust and moisture (Inside of the

connecting pipes.)
(2) Tight connection (between pipes and unit)
(3) Evacuate the air in the connecting pipes using

VACUUM PUMP.
(4) Check gas leak (connected points)

− 31−

FILE NO. SVM-08028

8-5-3. Evacuating

After the piping has been connected to the indoor unit,
you can perform the air purge together at once.

AIR PURGE

Evacuate the air in the connecting pipes and in the
indoor unit using
a vacuum pump. Do not use the refrigerant in the
outdoor unit.
For details, see the manual of the vacuum pump.

<Using a vacuum pump>

Be sure to use a vacuum pump with counter-flow
prevention function so that inside oil of the pump does
not flow backward into pipes of the air conditioner
when the pump stops. (If oil inside of the vacuum pump
enters into the air conditioner, which use R410A,
refrigeration cycle trouble may result.)

1. Connect the charge hose from the manifold valve to
the service port of the gas side packed valve.

2. Connect the charge hose to the port of the vacuum
pump.

3. Open fully the low pressure side handle of the
gauge manifold valve.

4. Operate the vacuum pump to start evacuating.
Perform evacuating for about 15 minutes if the piping
length is 20 meters. (15 minutes for 20 meters)
(assuming a pump capacity of 27 liters per minute.)
Then confirm that the compound pressure gauge
reading is −101 kPa (76 cmHg).

5. Close the low pressure side valve handle of gauge
manifold.

6. Open fully the valve stem of the packed valves
(both sides of Gas and Liquid).

7. Remove the charging hose from the service port.

8. Securely tighten the caps on the packed valves.

<Packed valve handling precautions>

• Open the valve stem all the way out; but do not try
to open it beyond the stopper.

• Securely tighten the valve stem cap with torque in
the following table:

Gas side 30 to 42 N·m
(∅9.52 mm) (3.0 to 4.2 kgf·m)

Liquid side 16 to 18 N·m
(∅6.35 mm) (1.6 to 1.8 kgf·m)

Service port

9 to 10 N·m
(0.9 to 1.0 kgf·m)

Hexagonal wrench
is required.

mm

4

Fig. 8-5-8

Compound
pressure gauge

-101 kPa

(76 cmHg)

Handle Lo

Charge hose Charge hose

Connecting pipe

Packed valve at gas side

Service port (Valve core (Setting pin))

Packed valve at liquid side

Pressure gauge

Vacuum pump adapter
for counter-flow
prevention

Fig. 8-5-7

Manifold valve

Handle Hi
(Keep full closed)

Vacuum

pump

− 32 −

FILE NO. SVM-08028

8-5-4. Wiring connection

1. Remove the valve cover from the outdoor unit.

2. Connect the connecting cable to the terminal as
identified with their respective matched numbers on
the terminal block of indoor and outdoor unit.

3. When connecting the connecting cable to the
outdoor unit terminal, make a loop as shown in the
installation diagram of indoor and outdoor unit, to
prevent water coming in the outdoor unit.

4. Insulate the unused cords (conductors) from any
water coming in the outdoor unit. Proceed them so
that they do not touch any electrical or metal parts.

<Stripping length of connecting cable>

Terminal block

1(L) 2(N)

Cord clamp

10 mm

75 mm

Earth line

10 mm

65 mm

Terminal
screw

Connecting

cable

Screw

Earth
line

8-6. How to Set Remote Control Selector

Switch

When two indoor units ae installed in seperated rooms,
there is no need to change the selector switch.

<Remote control selector switch>

• When two indoor units are installed in the same
room or the adjacent two rooms, they may be
controlled simultaneously with a single remote
control. To prevent this, set either unit and its
remote control to B setting. (Both units are set to A
setting before shipment.)

• The remote control signal is not recived when the
indoor unit setting is different from the remote
control one.

1. Setting the remote control selector switch
with the indoor unit.

1. Press RESET button on the indoor unit to turn
the air conditioner ON.

2. Point the remote control at the indoor unit.

Note: 1. Repeat above step to reset Remote Control to be A.

2. Remote Control A has not “A” display.

3. Default setting of Remote Control from factory is A.

Fig. 8-5-9

CAUTION

• Wrong wiring connection may cause some
electrical parts burn out.

• Be sure to comply with local codes on running
the wire from indoor unit to outdoor unit (size of
wire and wiring method etc.)

• Every wire must be connected firmly.

NOTE

• Wire type: H07 RN-F or 245 IEC66 (2.0 mm2 or
more)

− 33 −

FILE NO. SVM-08028

B

2. Set the remote control selector switch with the

remote control

[B] is indicated on the liquid crystal display when
setting remote control selector switch to B. [A] is
not indicated on the display even if the selector
switch is set to A.

1) Load the remote control with the batteries.

2) Press the [CHECK] button using something with

sharp point. (The preset temperature on the remote
control changes to [00].)

3) Press the [MODE] button while pressing the

[CHECK] button, [B] is indicted at the right of the
present temperature display.

• To reset the switch to the [A] setting, press the

[MODE] button again while pressing the [CHECK]
button.

8-7. Others

8-7-1. Gas leak test

Valve cover

Valve stem cap
connection

Service cap
connection

Fig. 8-7-1

• Check the flare nut connections, valve stem cap
connections and service port cap connections for
gas leak with a leak detector or soap water.

8-7-2. Test operation

To switch the TEST RUN (COOL) mode, press
RESET button for 10 seconds.
(The beeper will make a short beep.)

[MODE]

button

MODE

TEMP.

AUTO
COOL

DRY

AUTO FAN

START/STOP

SWING

MODE

RST

ON OFF SET CLR

TEMP.

FIX

CHK

TIMER

FAN

AUTO

B

QUIET

FAN

ECO

[CHECK]

button

Fig. 8-6-1

3. Confirm that the indoor unit can operate with
the new setting.

RESET button

Fig. 8-7-2

8-7-3. Auto restart setting

This product is designed so that, after a power failure,
it can restart automatically in the same operating mode
as before the power failure.

Information

The product was shipped with Auto Restart function
in the off position. Turn it on as required.

<How to set the auto restart>

• Press and hold the RESET button for about
3 seconds. the electronic beeper makes
three short beeps to tell you the Auto Restart
has been selected.

• To cancel the Auto Restart, follow the steps
described in the section Auto Restart Function of
the Owner’s Manual.

 − 34 −

9. TROUBLESHOOTING CHART

FILE NO. SVM-08028

9-1. Troubleshooting Procedure

Follow the details of 9-2. Basic Check Items.

If there is no troub le corresponding to 9-2, check
whether or not there are faulty parts following
9-4. Self-Diagnosis by Remote Control.

9-2. Basic Check Items

9-2-1. Power supply voltage

The line voltage must be AC 220 − 240V. If it is not
within this range, the air conditioner may not operate
normally.

Table 9-2-1

No.

1

2 The indoor fan motor speed does not

The compressor is not turned off even

3

Operation of air conditioner

When the main power supply is turned on,
the OPERATION lamp on the indoor unit
blinks.

change in the Dry operation.

though the room temperature is in the
range that the compressor is turned off.

The OPERATION lamp blinks to indicate that power is turned on. If the
[START/STOP] button is pressed, the lamp stops blinking.

The indoor fan motor speed is automatically controlled in the Dry
operation.

The compressor has a function that it is not turned off for 3 minutes
after it is turned on even though the room temperature is in the range
that the compressor is turned off.

9-2-2. Incorrect cable connection between Indoor

and outdoor units

The indoor unit is connected to the outdoor unit with
5 cables (Heat pump model) or 3 cables (Cooling Only
model). Check that the indoor and outdoor units have
been properly connected with terminals assigned the
same numbers. If the connectors are not properly
connected, the outdoor unit will not operate normally,
or OPERATION lamp and TIMER lamp will blink (5Hz).

9-2-3. Program control

The microcontroller operates as shown in Table 9-2-1
to control the air conditioner. If there are any opera­tional problems, check whether or not the problems
correspond to Table 9-2-1. If they correspond to the
Table, they are not problems with the air conditioner,
but they are indispensable operations to control and
maintain the air conditioner properly.

Descriptions

4 The compressor is not turned on and

off even though the thermo control is
operated in the Dry operation.

The compressor is not turned on even

5

though the room temperature is in the

range that the compressor is turned on.

6 The operation mode changes in the

Automatic operation.

7 The Auto Fan operation continues in the

Automatic operation.

8 The ECO operation

operation does not work.

In the Dry operation, the compressor is turned on and off automatically
at the regular intervals, independent of the thermo control.

The compressor is not turned on in the restart delay timer (3-minutes
timer) operation. It is also not turned on after the power supply is
turned on because of this timer operation.

In Automatic operation, the room temperature is detected all time
for control fan speed and the operation mode is changed every
15 minutes according to difference between the room temperature
and the preset temperature.

When the room temperature is in the range
(Preset temperature ± 1°C), the Auto Fan operation is selected.

These operations do not work when the unit is in the Dry
operation or Auto Fan operation.

− 35 −

9-3. Primary Judgement

9-3-1. Role of indoor unit controller

The indoor unit controller receives the operation
commands from the remote control and executes
them.

•Temperature measurement at the air outlet of the
indoor heat exchanger by the indoor temperature
sensor

•Temperature setting of the indoor heat exchanger by
the heat exchanger sensor

•Louver motor control

•Indoor fan motor operation control

•LED display control

•Transferring of operation commands to the outdoor

unit

Table 9-3-1

Lamps Self-diagnosis

FILE NO. SVM-08028

9-3-2. Failure diagnosis

The indoor unit diagnoses the operation condition and
indicates the information of the self-diagnosis with the
lamps on the display panel of the indoor unit.

A OPERATION lamp is blinking. (1Hz)

B OPERATION lamp is blinking. (5Hz)

C OPERATION lamp is blinking. (5Hz)

D OPERATION lamp is blinking. (5Hz)

E OPERATION lamp is blinking. (5Hz)

F OPERATION and TIMER lamps are blinking.

(5Hz)

G OPERATION and TIMER lamps are blinking.

Table 9-3-2 Diagnosis by detective operation

Symptom Check Primary judgement

The remote control
does not work.

The outdoor fan
does not rotate.

Turn off the power supply once,
then turn it on. Try to operate
the remote control.

The compressor operates.

The compressor does not operate.

Power failure (when the power supply is turning on)

Thermo sensor (TA) short or break

Heat exchanger sensor (TC) short or break

Indoor fan motor lock or failure

Indoor P.C. board failure

Wrong wiring of connecting cable

Cycle failure

•Gas shortage or other refrigerant cycle trouble

•Heat exchanger sensor open, break or short

•Overload relay or thermostat trouble of compressor

The remote control
still does not work.

The remote control
works.

The indoor unit (and/or remote
control) is/are defective.

OK.

The outdoor unit (Outdoor fan
motor) is defective.

An internal part of the
compressor or PCB is defective.

− 36 −

9-4. Self-Diagnosis by Remote Control

(Check Code)

(1) If the lamps are indicated as shown B to G in Table

9-3-1, exchanger the self-diagnosis by the remote
control.

(2) When the remote control is set to the service

mode, the indoor controller diagnoses the opera­tion condition and indicate the information of the
self-diagnosis on the display of the remote control
with the check codes. If a fault is detected, all
lamps on the indoor unit will blink at 5Hz and it will

beep for 10 seconds (Pi, Pi, Pi....). The timer lamp

usually blinks (5Hz) during the self-diagnosis.

9-4-1. How to use remote control in service mode

FILE NO. SVM-08028

(1) Press [CHK] button with a tip of pencil to set the

remote control to the service mode.

•

“00” is indicated on the display of the remote
control.

•

The timer lamp on the indoor unit blinks

continuously. (5 times per 1 sec.)

TEMP.

START/STOP

SWING

FIX

MODE

ON OFF SET CLR

WC-K10JE

RST

TIMER

CHK

ECO

FAN

(2) Press [8TEMP.] button.

If there is no fault with a code, the indoor unit will
beep once (Pi) and the display of the remote
control will change as follows:

00 01 1d 1E02 22

•

Check the unit with all 35 check codes (00 to

22). as shown in Table 9-4-1.

•

Press [9TEMP.] button to change the check
code backwards.

If there is a fault, the indoor unit will beep for 10
seconds (Pi, Pi, Pi...).
Note the check code on the display of the remote
control.

•

2-digits alphanumeric will be indicated on the
display.

•

All lamps on the indoor unit will blink. (5 times

per 1 sec.)

•

Alphanumeric characters are used for the check code.

is 5. is 6.
is A. is B.
is C. is D.

(4) Press [START/STOP] button to release the service

mode.

•

The display of the remote control returns to as it

was before service mode was engaged.

– 37 –

Block level Diagnosis function

Check Check

code

Block

Indoor
P.C. board

code

Symptom Conditioner Condition

Thermo. sensor
short/break.

Table 9-4-1

Continued
operation.

Air

status

Indicated
when detected
abnormal

FILE NO. SVM-08028

Judgement and action

1.Check thermo sensor.

2.If it is OK, check
P.C. board.

Cable
connection/
Thermal
fuse
Refrigerant
system

Heat exchanger
sensor
short/break.

Indoor fan lock,
abnormality of
indoor fan or
thermal fuse break.

Abnormality of other
indoor unit P.C.
board.

1) Wrong wiring or
disconnection of
connective cable.

2) Terminal fuse cut
off.

Continued
operation.

All off

All off

All off

Indicated
when detected
abnormal

Indicated
when detected
abnormal

Indicated
when detected
abnormal

Indicated
when detected
abnormal

1.Check heat exchanger
sensor.

2.If it is OK, check
P.C. board.

1.Check heat thermal
fuse is blow or not?
(Terminal block part.)

2.If the thermal fuse is
not blow, check indoor
fan motor.
(Refer to trouble
shooting flow charts.)

Replace P.C. borad.

1.Check connective
cable correct if wiring is
wrong.

2.Check thermal fuse
and Terminal blocks.

3.If it is OK, check
P.C. board.

Other parts
(including
compressor)

1) Overload relay or
thermostat for
compressor

All off

Indicated
when detected
abnormal

1.If overload relay and

break.

2.If refrigerant cycle is

3. If heat exchanger

Content detected by the check codes "

" o " t " are stored in memory of the microcomputer even if the

power supply is turned off. Therefore, contents of operations in the past are all displayed.

– 38 −

themostat for compres­sor are OK, check
refrigerant cycle.

OK, check P.C. board.

sensor is OK, check
overload relay and
themostat for
compressor.

9-5. Troubleshootig Flowcharts

9-5-1. Power can not be turned on (No operation at all)
<Preliminary checks>

(1) Is the supply voltage normal?
(2) Is the connection to the AC output OK.?

Shut off the power supply

from AC outlet once and

turn it on after 5 seconds.

FILE NO. SVM-08028

Operation

Check Items

Main cause

Countermeasure

Symptom

Does the thermal

(Under PF. Terminal)

Is the indication voltage

NO

(DC12V or 5V) of main

P.C. board correct?

Is the voltage

across C27 measured

DC310 ~ 340V?

YES

NO

Does the fuse

(F01) blow?

fuse blow?

NO

Does the OPERATION

lamp blink?

Does the power turn on

by pushing the

button of the

remote control?

NO

NO

YES

Refer to the paragraph

"Pre-check", or defective circuit

before power P.C. board block.

YES

[START/STOP]

YES

YES

YES

Parts (R62, R63, SG01,

C25, C26, DB01, C27, T01)

are defective.

Wrong wiring of

AC cord or connecting

cable is defective.

Does the CN12

connector the wrong

connecting?

NO NO

Does the transmission

indicator of remote

control flash normally

and transmit certainly?

(No problem)

YES

NO

YES

P.C. board is

defective.

Remote control is

defective.

Replace the remote

control.

Replace the

thermal fuse set.

Check connection.

Replace the main

P.C. board.

Re-wiring the cable.

Is the voltage

across C32

measured DC12V?

YES YES

* Be sure to disconnect the motor connector CN10 after shut off the power supply, or it will be a cause of damage of the motor.

Shut off the power

supply once, and turn

NO NO

it on again after

disconnecting the motor

connector CN10*.

Is the voltage across C32

measured DC12V?

Replace the main

Motor is defective.

– 39 −

P.C. board.

9-5-2. Power can not be turned on after replacing indoor P.C. board

<Checking Procedure>

Connect the AC

Power supply

FILE NO. SVM-08028

Does the OPERATION

lamp blink?

YES

NO NO

Black

White

Is it wired as shown

in Figure below?

YES

1 2

Indoor Terninal Block

Blue

Brown

Green/Yellow

Return the wiring of the

power relay is returned to

the normal procedure.

To the paragraph of

"No Power turns on".

CN31

4

RY01

3

Supply
AC 220~240V
50/60 Hz

– 40 −

9-5-3. Outdoor unit does not operate

Shut off the power supply

from AC outlet once and turn

it on after 5 seconds.

FILE NO. SVM-08028

Does the OPERATION lamp blink?

YES

Does the power turn on by pushing

the [START/STOP] button

of the remote control?

YES

Is AC 220-240V supplied between

terminal block 1 -

Is cable connection between indoor

and outdoor units correct?

Check items as following procedure

in 9-5-4, 9-5-5, 9-5-6

YES

YES

2

?

NO

NO

NO

NO

See "Power can not be turned on".

See "Power can not be turned on".

Relays (RY01)

Q02 or IC30 is failure.

Correct cabling between indoor

and outdoor units.

Replace the

P.C. board.

– 41 −

9-5-4. Only compressor does not operate

Shut off the power supply

from AC outlet once and turn

it on after 5 seconds.

FILE NO. SVM-08028

Does the OPERATION lamp blink?

YES

Does the power turn on by

pushing the [START/STOP] button

of the remote control?

YES

Is the voltage across the indoor terminal

( 1 - 2 ) AC 220-240V?

YES

Is cable connection between indoor

and outdoor units correct?

YES

Is the voltage across the outdoor terminal

( 1 - 2 ) AC 220-240V?

YES

Are all the cords for compressor normal?

YES

NO

NO

NO

NO

NO

NO

See "Power can not be turned on".

See "Power can not be turned on".

Relays (RY01) or Q02

or IC30 is failure.

Correct cabling between indoor

and outdoor units.

Cables between indoor and
outdoor units are defective.

Re-wire or replace the defective cords.

Replace the

P.C. board.

Is the compressor motor winding normal?

(Check the winding resistor.)

YES

Is the capacitor for compressor normal.

YES

Is the overload relay normal?

YES

Does the compressor start?

YES

Compressor starts but

it stops after a while?

YES

Is the gas quantity normal?

(Check the pressure)

YES

Compressor is defective

NO

NO

NO

NO

NO

Compressor is defective.

Capacitor is defective.

Overload relay is defective.

Compressor is defective.

Gas shortage (Gas leakage)

− 42 −

9-5-5. Only outdoor fan does not operate

Shut off the power supply

from AC outlet once and

turn it on after 5 seconds.

FILE NO. SVM-08028

Does the OPERATION lamp blink?

YES

Does the power turn on by

pushing the [START/STOP] button

of the remote control?

YES

Is the voltage across the terminal

-

:

1 2

AC 220-240V?

YES

Is cable connection between indoor

and outdoor units correct?

YES

Is the voltage across the terminal

-

:

1 2

AC 220-240V?

YES

Are all the cords for outdoor

fan motor normal?

YES

NO

NO

NO

NO

NO

NO

See "Power can not be turned on".

See "Power can not be turned on".

Relays (RY01) or Q02

or IC30 is failure.

Correct cabling between indoor

and outdoor units.

Cables between indoor

and outdoor units are defective.

Correct the wire or

replace the defective cords.

Replace the

P.C. board.

Is the outdoor fan motor winding normal?

(Check the winding resistance)

YES

Is the capacitor for compressor normal?

YES

Outdoor fan motor is defective.

NO

NO

Outdoor fan motor is defective.

Capacitor for outdoor

fan motor is defective.

− 43 −

Shut off the

power supply once.

Turn the power supply.

FILE NO. SVM-08028

Does the fan stop in

no operating status?

YES

Start the operation
with low fan setting

in cool operation.

Does the fan rotate?

YES

Change the setting of

cooling to hight fan.

Does the fan speed

become higher?

YES

NO

NO

NO

Control P.C. board is defective.

Does AC 120V

or higher voltage apply

to between red and black

lead of fan motor?

YES

Shut off the power supply.

Does the cross flow

fan rotate normally?

YES

Turn on the power supply.

Operation

stops

NO

NO

Does connecting

terminal, connecting

cable or power supply

cord completely?

Does not found the short

wire about connecting

cable and power cord?

Repair the
bearing of

the fan.

Motor control circuit failure

(IC30, IC03, Q08) or 12V

power circuit failire.

Replace the P.C. board.

Replace the P.C. board.

NO

YES

Thermal fuse operated

due to prevent

temperature rising cause

of incompleted connecting.

Normal

Is the rotation signal (DC+12V-0V)

output between 2 (gray lead wire)

and 3 (brown lead wire) of the motor

connector (CN11) when rotating

the cross flow fan by hand in no

operating status?

(1 pulse/one turn)

YES

Replace the control

P.C. board.

− 44 −

NO

Replace the fan motor

Replace connecting

the cable (or power cord),

thermal fuse and

terminal block.

FILE NO. SVM-08028

9-6. Troubleshooting for Remote Control (Including the Indoor P.C. Board)

There is no been from

Push the [START/STOP] button.

the indoor unit.
The operation lamp of
the air conditioner main
unit does not light.

Is there direct

sunlight on the

receptor of the air

conditioner?

YES

NO

Is there any

thyristor

fluorescent light

near by?

YES

NO

YES

NO NO

Is operation possible

when setting the

temporary switch of the

air conditioner main unit

to "TEST RUN" or

"TEMPORARY AUTO"?

Does the transmission

indicator blink?

Is operation

possible when the

transmitter is moved

nearer to the infrared

signal receiver of the

air conditioner?

YES

Battery life

NO

Reset the remote control

by use the tip pencil push

in the RESET hole

Push the [START/STOP]

button

Dose the

transmission

indicator light?

YES

NO

Avoid direct

sunlight.

Keep the air

conditioner away

from thyristor

fluorescent light.

YES

Can any signal

tone be heard

when transmitting

within 5 cm distance

from the radio?

YES

P.C. board is failure.

Replace

P.C. board

NO

Replace the

batteries

NO

Normal

Is there any

beep and

operation?

YES

Remote control

is failure.

Replace remote

control.

− 45 −

FILE NO. SVM-08028

9-6-1 How to check the P.C. board

(1) Operating precautions

1) When removing the front panel or the P.C. board,
be sure to shut off the power supply.

2) When removing the P.C. board, hold the edge of
the P.C. board and do not apply force to the
parts.

3) When connecting or disconnecting the connec­tors on the P.C. board, hold the Whole housing.
Do not pull at the lead wire.

(2) Inspection procedres

1) When a P.C. board is judged to be defective,
check for disconnection, burning, or discolora­tion of the copper foil pattern or this P.C. board.

2) The P.C. board consists of the following 2 parts

a. Main P.C. board part:

power relay, indoor fan motor drive circuit and
control circuit, C.P.U. and peripheral circuits,
buzzer drive circuit and buzzer.

b. Infrared rays receive and indication parts:

Infrared rays receiver unit and LED.

− 46 −

(3) Checking procedure

TVab

FILE NO. SVM-08028

le 9-6-1

No.

Shut off the power supply and
remove the P.C. board assembly
from the electronic parts base.
Remove the connecting cable from
the terminal block.

Remove the connector for the motor,
and turn the power on.
If the OPERATION lamp blinks
(0.5 sec. : ON, 0.5 sec. : OFF) when
the power turning on, the checking
points described as 1-4 of right
column are not necessary to
perform.

Make the operation status by
pushing once the [START/STOP]
button, except the status of [FAN
ONLY], [ON TIMER].

4

Start the operation with the system
which the time of the restart delay
timer is shortened.

ocedure

Check Point (Symptom) Causes

1.Is the fuse blown?

oltage chec

1.

Betw1een 4 of RY01 and CN31
(A2C 220~240V)

2.3Between + and − of C27

(DC 310 ~ 340V)

35. Between

41..•Between

Voltage check

1.Voltage of relay coil. (DC 12V)

Between pin C of Q02 and GND

2.Between No. 1 and 2 of
connecting cable terminal block.
(AC 220~240V)

1.All indicators light for 3 sec..

2. Indicators do not indicate normally
after approximate 3 sec..

k

5V andPrGND

12V

and

GND

Application of shoc

•Ov1.er•load bAy shor

par

C po

wer cord is def

oor contact of the ter

Miss wir

•2Capacitor (C25, C26) is def.ectivPe

Line filter (L01) is def

•

Diode (DB01) is def

3

IC02 is def
T01, DB01, R64, C27 are
detective.

1•.PBreaking wire of the rela

def•ectiv

}

e rela

oor contact of rela.y•.

Def

ectivee indicator., or poor

housing assemb

k v

t-circuit of the

ing of the po

ectivloew.

y dr

.2.

ly

. (CN12)

oltage

ectivtse..

minal plate.

wer relaivyer.

ectiv

ectiv

e1..

y coil,

.

Make the operation status by
pressing once the [START/STOP]
button.

1.The time of the restart delay timer
is shortened.

2.Cool operation

3.Air volume [AUTO]

4. Make the setting temperature lower
enough than room temperature.

5.Continuous operation.

6

Turn the power on after connecting
the motor connector. Start the
operation with the following
condition.

1.Operation [Cooling]

2.Airflow [High fan]

3.Continuous operation

1.Compressor does not operate.

2.OPERATION lamp blinks.

1.Motor does not rotate. (The key
operation is accepted.)

2.The Motor rotates, but it vibrates
too much.

The temperature of the indoor
heat e. xchanger is abnor

er4..

2.

Poor contact of the heat
exchanger sensor. (The connector
is disconnected.) (CN01)

3.Heat exchanger sensor, main
P.C. board are defective. (Refer to
Table 9-6-2 for the judgment of
defective resistance values.)

4.Main P.C. board is defective.

1.Poor contact of the motor
connector.

2.P.C. board is defective.

mally

− 47 −

FILE NO. SVM-08028

Table 9-6-3 Approximate resistance value of thermo sensor

Temperature 0°C 10°C 20°C 25°C 30°C

Resistance value 33.8 20.35 12.59 10.00 7.99

9-6-3. How to shorten time of restart delay timer

1

Press [CLR] button while pressing [CHK] button
with a tip of a pencil.

2

Then press [START/STOP]
signal to the indoor unit.

2

MODE

AUTO
COOL

DRY

AUTO FAN

SWING

MODE

TEMP.

Hr.ON OFF

TEMP.

START/STOP

FIX

ECO

RST

CHK

TIMER

FAN

AUTO
QUIET

FAN

1

(kΩ)

ON OFF SET CLR

− 48 −

FILE NO. SVM-08028

10. PART REPLACEMENT

10-1. Indoor Unit

No. Part name Procedures Remarks

1 Front panel

2 Electrical part

How to remove the front panel

1) Stop the operation of the air conditioner and
turn off its main power supply.

2) Pull the air inlet grille toward you to open it
and remove the air inlet grille.
Then remove the 2 screws fixing the front
panel.

3) First open the horizontal louver, and then
remove the front panel from the back body
by pulling it toward you.

How to mount the front panel

Push the front panel back in and make sure
all hooks are locked.

How to remove the electrical part.

1) Remove the front panel with procedure 1 .

2) Remove the screw holding the electrical part
cover.

3) Disconnect the 3 connectors 2-(3P) for the fan
motor and the connector (5P) for the louver
motor from the P.C. board assembly.

4) Pull out the TC sensor from the sensor
holder.

5) Remove the screw for the ground connection,
remove the screw for the electrical part box.

Then remove the LED and the electrical part
box from the main unit.

2

2

2 2-Screws

3

2 Screws

4 TC Sensor

2

3 Horizontal

louver

How to mount the electrical part.

1) To put back the electrical part box, lock it to
the upper hook of the back body.

2)

Tighten the screws on the electrical part box.

3) Connect the 3 connectors and arrange the
wiring same as original condition and then
tighten the screw from the LED unit to the
back body.

4) Attach the TC sensor to the holder.

5) Tighten the screw for the ground connection.

6) Tighten the screw on the electrical part cover.

1) Remove the front panel and the electrical
part following procedure 2.

2) Remove the center shaft of the horizontal
louver from the back body.

3) Remove the left shaft from the back body.

4) Remove the horizontal louver from the back
body.

3 Left shaft

3-Connectors

5

2 Center shaft

3

Screws

− 49 −

FILE NO. SVM-08028

No. Part name Procedures Remarks

4 Heat exchanger

5 Cross flow fan

1) Remove the front panel, electrical part and
the horizontal louver following procedure 3.

2) Remove the pipe holder at the rear side of
main unit.

3) Remove the 2 screws on the heat exchanger
at the base bearing.

4) Remove the screw on the heat exchanger
at the fixed plate from the back body and then
pull out the right hand side until the socket of
heat exchanger released from the hook of the

band motor (L), and then pull out the upper
side of heat exchanger slowly.

1) Remove the front panel, electrical part,
horizontal louver and the heat exchanger
following procedure 4.

2) Remove the 2 screws on the band motor (L)
and remove the 2 screws on the band motor
(R) and then remove the cross flow fan.

3) Loosen the set screw of the cross flow fan
then separate the fan and the fan motor.

Notice
To assemble cross flow fan and fan motor to the
unit, please turn the fan motor unit the center of
its terminal meets the top position of band motor
(R).
Fix the cross flow fan with the set screw at the
position where the gap between the back body
and the right surface of the cross flow fan is

4.7 mm.

2 Pipe holder

3
2-Screws

2-Screws (R)
2

2-Screws (L)

2

4.7 mm

6 Set screw

Middle of the fan motor terminal

4 Screws

6 Base bearing

1) Remove the front panel, electrical part,
horizontal louver, heat exchanger and the
cross flow fan following procedure 5.

2) Remove the 2 screws fixing the base bearing.

3) Remove the bearing from the base bearing. If
the housing protrudes from the base bearing,
put the housing in position and attach the
bearing to the base bearing.

− 50 −

2

2-Screws

FILE NO. SVM-08028

10-2. Outdoor Unit

No. Part name Procedures Remarks

1 Common

procedure

1. Detachment

1) Stop operation of the air conditioner, and
turn off the main switch and breaker of the
air conditioner.

2) Remove the valve cover. (ST1T∅4 x 10s
1 pc)

• After removing screw, remove the valve

cover pulling it downward.

3) Remove the wiring cover (ST1T∅4 x 10s 2
pcs.), and then remove the power cord,
connecting cable, and cord clamp
(ST2T∅4 x 16s 2 pcs.).

4) Remove the upper cabinet.
(ST1T∅4 x 10s 5 pcs.)

• After removing screws, remove the

upper cabinet pulling it upward.

2. Attachment

1) Attach the upper cabinet.
(ST1T∅4 x 10s 5 pcs.)

• Hook the rear side of the upper cabinet

to the claw of the rear cabinet, and then
place it on the front cabinet.

2) After connecting the power cord and
connecting cable, attach the cord clamp
and wiring cover.

• Insert the upper part into the upper

cabinet, and insert the claw which has
been hooked to the lower part into the
square hole, and then fix it with screw.
(ST1T∅4 x 10s 1 pc.)

3)

Attach the valve cover. (ST1T∅4 x 10s 1 pc.)

• Insert the upper part to the upper

cabinet, set the hook claw of the valve
cover to square holes (at three
positions) of the main unit, and attach it
pushing upward.

Upper cabinet

Wiring cover

Valve cover

Upper cabinet

2 Front cabinet

1. Detachment

1) Perform work of item 1 of 1.

2) Remove upper screw (ST1T∅4 x 10s 3 pcs.)
of the front cabinet, and lower screws
(ST1T∅4 x 10s 8 pcs.) of the front cabinet.

• Both side of front cabinet envelop the

unit, so remove it by pulling sideward.

2. Attachment

1) Assemble front cabinet to the unit.

2) Attach the removed screws to the original
positions.

– 51 –

FILE NO. SVM-08028

No. Part name Procedures Remarks

3 Fan motor

4 Compressor

1) Perform work of item 1 of 1 and 1 of 2.

2) Remove the flange nut fixing the fan motor
and the propeller fan.

• Flange nut is loosened by turning

clockwise.
(To tighten the flange nut, turn counter­clockwise.)

3) Remove the propeller fan.

4) Disconnect the connector for the fan motor
from the ASM-E-PARTS.

5) Remove the fixing screws (4 pcs.) holding
the fan motor by hand so that it does not
fall.

6) Cut the motor lead at the point which is
100 mm apart from the connector toward
the fan.

7) Use the connector used for the

ASM-E-PARTS, and pinch the lead wires
using the closed end splice.

1) Perform work of item 1 of

1 of 2,

3

1

,

2) Extract refrigerant gas.

3) Remove the partition board.
(ST1T∅4 x 10s 3 pcs.)

4) Remove the sound-insulation material.

5) Remove the terminal cover of the
compressor, and disconnect the lead wire
of the compressor thermo and the
compressor from the terminal.

6) Remove the pipe connected to the
compressor with a burner.

• Make sure the flame does not touch the

4 way valve.

7) Remove the fixing screw of the base plate
and heat exchanger.
(ST1T∅4 x 10s 2 pcs.)

8) Pull upward the refrigeration cycle.

9) Remove the nut fixing the compressor to
the base plate.

Propeller fan

Flange nut

Compressor

Fan motor

100

Closed end
splice

– 52 –

FILE NO. SVM-08028

No. Part name Procedures Remarks

5 Fan guard

1. Detachment

1) Perform work of item 1 of 1 and 1 of 2.

Requirement:
Perform the work on a corrugated
cardboard, cloth, etc. to prevent
scratches to the product.

2) Remove the front cabinet, and place it
down so that the fan guard side faces
downwards.

3) Remove the hooking claws by pushing a
minus screwdriver according to the arrow
mark in the right figure, and remove the
fan guard.

2. Attachment

1) Insert the claws of the fan guard in the
hole of the front cabinet. Push the hooking
claws (8 positions) by your hand and fix
the claws.

Requirement:
This completes all the attaching
work. Check that all the hooking
claws are fixed to the specified
positions.

Minus screwdriver

Hooking claw

6 Capacitor for

compressor

7 Capacitor for

fan motor

1) Perform the common procedure 1.

2) Remove the fixing screw and the capacitor

band.
( 1-Screw ∅4 x 10s)

3) Disconnect the lead wires.

1) Perform the common procedure 1.

2) Remove the fixing screw and the capacitor

band.
( 1-Screw ∅4 x 10s)

3) Disconnect the lead wires.

Capacitor for

compressor

Capacitor band

Screws

∅4 x 10s

Capacitor

for fan motor

Screws

∅4 x 10s

– 53 –

11. EXPLODED VIEWS AND PARTS LIST

11-1. Indoor Unit (E-Parts Assy)

FILE NO. SVM-08028

Location Part Location Part

No. No. No. No.

401 43T60378 TERMINAL 410 43T62003 CORD CLAMP
403 43T69371 SENSOR;HEAT EXCHANGER 411 43T69745 PC BOARD (RAS-07SKSX-1)
404 43T69005 SENSOR;THERMOSTAT 411 43T69746 PC BOARD (RAS-09SKSX-1)
405 43T69612 DISPLAY UNIT 414 43T60343 POWER CORD
406 43T69364 FUSE,TEMPERATURE

Description Description

− 54 −

11-2. Indoor Unit

FILE NO. SVM-08028

Location Part Location Part

No. No. No. No.

201 43T00462 FRONT PANEL ASSY 215 43T49006 HOLDER FOR PLATE
202 43T09393 GRILLE OF AIR INLET 217 43T22312 BEARING ASSY, MOLD
203 43T03358 BACK BODY ASSY 218 43T39319 BASE BEARING
204 43T80315 AIR FILTER 219 43T20323 ASSY CROSS FLOW FAN
205 43T09392 HORIZONTAL LOUVER 220 43T39320 MOTOR BAND(LEFT)
206 43T70313 HOSE, DRAIN 221 43T39321 MOTOR BAND(RIGHT)
207 43T79301 CAP-DRAIN 222 43T21393 FAN MOTOR
208 43T21363 MOTOR; STEPPING 224 43T82309 INSTALLATION PLATE
209 43T44424 REFRIGERATION CYCLE ASSY 225 43T69437 WIRELESS REMOTE CONTROL
210 43T47353 PIPE; SUCTION (RAS-13) 226 43T63002 REMOTE CONTROL HOLDER
211 43T47355 PIPE; SUCTION (U1U2_GD) 227 43T62326 TERMINAL COVER
212 43T11317 PIPE SHIELD 228 43T60317 CORD MOTOR LOUVER
213 43T19333 HOLDER, SENSOR 229 43T07311 PIPE HOLDER
214 43T49329 PLATE OF EVA SEAL

Description Description

− 55 −

11-3. Outdoor Unit (RAS-07S2AX-1)

27

29

FILE NO. SVM-08028

16

15

26

14

28

13

18

21

24

5

1

19

25

2

3

4

8,10

7,9

6

22

17

23

20

12

Location Part Location Part

No. No. No. No.

1 43T42335 BASE PLATE ASSEMBLY 16 43T19335 FAN GUARD
2 43T41365 COMPRESSOR(Made in China) 17 43T04304 PARTITION
3 43T49327 CUSHION,RUBBER 18 43T39326 MOTOR BASE CONNECTION PLATE
4 43T97001 NUT 19 43T39325 MOTOR BASE
5 43T43407 CONDENSER ASSEMBLY 20 43T19337 PACKED VALVE COVER
6 43T00448 FIXING PLATE VALVE 21 43T00481 UPPER CABINET
7 43T46332 VALVE;PACKED 6.35 DIA 22 43T96305 BUSHING
8 43T00347 VALVE;PACKED 9.52 DIA 23 43T62323 TERMINAL COVER

9 43T47331 BONNET, 6.35 DIA 24 43T19336 FIN GUARD
10 43T47332 BONNET, 9.52 DIA 25 43T54314 RELAY;OVERLOAD
11 43T47007 CAPILLARY TUBE; 1.2 DIA 26 43T61310 ELECTRIC PARTS BASE
12 43T00486 FRONT CABINET 27 43T55338 CAPACITOR,PLASTIC FILM
13 43T21401 MOTOR;FAN 28 43T55325 CAPACITOR; PLASTIC-FILM
14 43T20324 PROPELLER FAN 29 43T60367 TERMINAL-2P
15 43T47001 NUT FLANGE

Description Description

− 55 −

11-4. Outdoor Unit (RAS-09SASX-1)

FILE NO. SVM-08028

Location Part Location Part

No. No. No. No.

1 43T42335 BASE PLATE ASSEMBLY 16 43T19335 FAN GUARD
2 43T41390 COMPRESSOR 17 43T04304 PARTITION
3 43T49327 CUSHION,RUBBER 18 43T39326 MOTOR BASE CONNECTION PLATE
4 43T97001 NUT 19 43T39325 MOTOR BASE
5 43T43406 CONDENSER ASSEMBLY 20 43T19337 PACKED VALVE COVER
6 43T00448 FIXING PLATE VALVE 21 43T00481 UPPER CABINET
7 43T46332 VALVE;PACKED 6.35 DIA 22 43T96305 BUSHING
8 43T00347 VALVE;PACKED 9.52 DIA 23 43T62323 TERMINAL COVER

9 43T47331 BONNET, 6.35 DIA 24 43T19336 FIN GUARD
10 43T47332 BONNET, 9.52 DIA 25 43T54303 RELAY;OVERLOAD
11 43T47008 CAPILLARY TUBE; 1.5 DIA 26 43T61310 ELECTRIC PARTS BASE
12 43T00487 FRONT CABINET 27 43T55337 MF CAPACITOR
13 43T21401 MOTOR;FAN 28 43T55325 CAPACITOR; PLASTIC-FILM
14 43T20324 PROPELLER FAN 29 43T60367 TERMINAL-2P
15 43T47001 NUT FLANGE

Description Description

− 57 −

FILE NO. SVM-03001(1)

TOSHIBA CARRIER (THAILAND) CO.,LTD.

144/9 MOO 5, BANGKADI INDUSTRIAL PARK, TIVANON ROAD, TAMBOL BANGKADI,

AMPHUR MUANG, PATHUMTHANI 12000,THAILAND.

– 72 –