Toshiba RAS-M16GKV-E2, RAS-M13GKV-E2, RAS-M13GKCV-E2, RAS-M10GKV-E2, RAS-M10GKCV-E2 SERVICE MANUAL

SERVICE MANUAL

AIR-CONDITIONER

RAS-M10GKV-E2, RAS-M13GKV-E2, RAS-M16GKV-E2

FILE NO.SVM-06036

SUPPLEMENT

SPLIT TYPE

RAS-M10GKCV-E2, RAS-M13GKCV-E2, RAS-M16GKCV-E2

(This service manual provide information only on the indoor units.

For information on the outdoor unit please refer to the service manual

of the outdoor unit.)

R410A

June, 2006

CONTENTS

1. Specifications

2. Construction Views

3. Wiring Diagram

4. Specifications of Electrical Parts (Indoor unit only)

5. Control Block Diagram (Indoor unit only)

6. Operation Description

7. Installation Procedure

FILE NO. SVM-06036

8. How to Diagnose the trouble

9. How to Replace the main parts (Indoor unit only)

10. Exploded Views and Parts list (Indoor unit only)

– 1 –

1. SPECIFICATIONS

Specifications

RAS-M10GKV-E2, RAS-M13GKV-E2, RAS-M16GKV-E2

FILE NO. SVM-06036

Power supply

Electric Unit model

characteristice Running current (A)

Power consumption (W)

Power factor (%)

Operating High dB (A)

noise Medium dB (A)

Low dB (A)

Dimension Height (mm)

Width (mm)

Depth (mm)

Net weight (kg)

Fan motor output (W)

Air flow rate

(Cooling/Heating)

Piping Type

connection Liquid side

Gas side

Refrigerant

Wiring connection (Interconnection)

(m3/h) 570/610 590/620 650/660

220/230/240V, 1Ph, 50/60Hz

RAS-M10GKV-E2 RAS-M13GKV-E2 RAS-M16GKV-E2

0.15 0.15 0.15

303030

87 87 87

36/39

33/35

28/29

275 275275

790

218

10

20

∅6.35

∅9.52

4 wires : includes earth

39/40

35/35

28/29

Flare connection

∅6.35

∅9.52

R410A

790

218

10

20

42/42

39/39

33/33

790

218

10

30

∅6.35

∅12.7

RAS-M10GKCV-E2, RAS-M13GKCV-E2, RAS-M16GKCV-E2

Power supply

Electric Unit model

characteristice Running current (A)

Power consumption (W)

Power factor (%)

Operating High dB (A)

noise Medium dB (A)

Low dB (A)

Dimension Height (mm)

Width (mm)

Depth (mm)

Net weight (kg)

Fan motor output (W)

Air flow rate (m3/h)

Piping Type

connection Liquid side

Gas side

Refrigerant

Wiring connection (Interconnection)

220/230/240V, 1Ph, 50/60Hz

RAS-M10GKCV-E2 RAS-M13GKCV-E2 RAS-M16GKCV-E2

0.15 0.15 0.15

30 30 30

87 87 87

36 39 42

33 35 39

28 28 33

275 275 275

790 790 790

218 218 218

10 10 10

20 20 30

570 590 650

Flare connection

∅6.35

∅9.52 ∅9.52 ∅12.7

4 wires : includes earth

∅6.35 ∅6.35

R410A

• The specifications may be subject to change without notice for purpose of improvement.

– 2 –

Indoor Unit

FILE NO. SVM-06036

2. CONSTRUCTION VIEWS

Front panel

60

6

Knock out system

Air inlet

Air filter

Heat exchanger

790

275

Air outlet

64

120 80

590

Hanger

218

60

6

48

Knock out system

48

53

Drain hose (0.54m)

Hanger

45

Minimum
distance
to ceiling

275

170 or more

320

620

235 235

215 215

Minimum
distance
to ceiling

65 or more

Hanger

– 3 –

Connecting pipe (0.43m)

(Flare ∅6.35)
Connecting pipe (0.33m)
(For 10,13 series ; Flare ∅9.52

For 16 series ; Flare ∅12.7)

Hanger

For stud bolt (∅6)

Hanger

150150 160160
Installation plate outline

Center line

For stud bolt
(∅8~∅10)

26

Minimum
distance
to ceiling

170 or more

32

9090

4519040

160

57 18

Wireless remote control

3-1. Indoor Unit (For 10k & 13k)

COLOR INDICATION

:

BROWN

BRW

:

RED

RED

:

WHITE

WHI

:

YELLOW

YEL

:

BLUE

BLU

:

BLACK

BLK

:

GRAY

GRY

:

PINK

PNK

:

ORANGE

ORN

:

GREEN & YELLOW

GRN&YEL

:

GREEN

GRN

BLK
BLK

HEAT EXCHANGER

SENSOR

(TC)

THERMO SENSOR

RECEIVING AND

INFRARED RAYS

MCC-861

MCC-861

(TA)

INDICATING PARTS

CN25
(WH I)

1

2

3

4

5

6

7

8

9

10

11

BLK

BLK

BLU

1

BLU

2

BLU

3

BLU

4

BLU

5

BLU

6

BLU

7

BLU

8

BLU

9

BLU

10

WHI

11

1

CN01
(BLU)

1

2

CN03
(WHI)

1

2

CN13

(WHI)

1

2

3

4

5

6

7

8

9

10

11

4

TERMINAL

1

2

1

2

1

2

3

4

5

6

7

8

9

10

11

BLOCK

MAIN P.C. BOARD

3. WIRING DIAGRAM

３

２

1

2

BLK WHI RED

CN23

CN24

FUSE

F01

T3.15A

250VAC

WP-004

CN21

LINE

FILTER

R04

3

CN11 CN10

1

1

YEL

CN08

3

1

4

2

HA

JEM-A

Drive ci rcuit

2

3

3

2

GRY

1

1

150°C

Fan Motor

BRW

2

3

3

2

supply circ uit

+12 VDC

+5 VDC

4

5

4

5

INDOOR

UNIT

Power

3

5

5

3

BLK

WHI

6

6

FILE NO. SVM-06036

OUTDOOR

UNIT

5

CN07

(WH I)

WHI

1

1

1

2

2

3

3

4

4

5

5

1

6

1

RED

AC FAN MOTOR

1

YEL

2

2

YEL

3

3

YEL

4

4

YEL

5

5

LOUVER MOTOR

Simple Check for Failure Diagnosis

Chec k It em

Check to see if the OPERATION indicator goes on

OPERAT ION

1

INDICATOR

TERMINAL

2

3

4

5

6

(AC 220~24 0V)

and off when t he main s witch or b reaker is turned on.
(Check the primary and secondary voltage of the
transformer.)

Check the power supply voltage b etween and .
(Refer to the name plate.)
(Check the primary and secondary voltage of the
transformer.)

BLOCK

Check the fluctuating voltage between and .
(15~60VDC)

FUSE

Check to see if the fuse blows out.

3.15A

(Check the R04 of the varis tor.)

Check the voltage at the No.4 pin on CN13 connector
of the infr ared receiver.

DC5V

(Check the transform er and the pow er supply ci rcuit
of the rated voltage.)

Check the voltage at the white lead of the louver
motor.

DC12V

(Check the transform er and the pow er supply ci rcuit
of the rated voltage.)

Check the voltage at the No.1 pin on CN10
connecto r and CN24.
(Check the F01)

Refer to the service data for the detailed failure
diagnosis.

Diagnosis Result

1

2

2

3

– 4 –

3-2. Indoor Unit (For 16k)

COLOR INDICATION

:

BROWN

BRW

:

RED

RED

:

WHITE

WHI

:

YELL OW

YEL

:

BLUE

BLU

:

BLACK

BLK

:

GRAY

GRY

:

PINK

PNK

:

ORANGE

ORN

:

GREEN & YEL LOW

GRN&YEL

:

GREEN

GRN

HEAT EXCHANGER

SENSOR

(TC)

THERMO SENSOR

(TA)

CN25
(WHI)

1

2

3

4

5

6

7

8

9

RECEIVING AND

INFRARED RAYS

INDICATING PARTS

10

MCC-861

MCC-861

11

1

CN01
(BLU)

BLK

1

1

BLK

2

2

CN03
(WHI)

BLK

1

1

BLK

2

2

CN13

(WHI)

BLU

1

1

2

3

4

5

6

7

8

9

10

11

BLU
BLU
BLU
BLU
BLU
BLU
BLU
BLU

BLU
WHI

1

2

2

3

3

4

4

5

5

6

6

7

7

8

8

9

9

10

10

11

11

4

TERMINAL

BLOCK

FUSE

F01

T3.15A

250VAC

2

CN24

BLK

1

WHI

CN23

3

2

MAIN P.C. BOARD

MCC-867or MCC-5014

1

3

RED

R04

CN08

3

2

HA

JEM-A

CN21

FILTER

4

LINE

R05

DB01

~

-+
~

C03

+

INDOOR

UNIT

DC5V
DC12V

FILE NO. SVM-06036

OUTDOOR

UNIT

CN10

6

(WHI)

1

3

4

5

6

CN07

(WHI)

1

2

CIRCUIT

3

POWER SUPPLY

4

5

FAN MOTOR

RED

1

BLK

3

4

5

6

WHI
YEL
BLU

DC MOTOR

5

WHI

1

1

2

3

4

5

1

YEL

2

2

YEL

3

3

YEL

4

4

YEL

5

5

LOUVER MOTOR

Simple Check for Failure Diagnosis

Check Item

OPERATION

1

INDICATOR

TERMINAL

2

BLOCK

3

4

5

6

(DC310 340V)

DC12V

DC325V

~

Check to see if the OPERATION indicator goes on
and off when the main switch or breaker is turned on.
(Check the primary and secondary voltage of the
transformer.)

Check the power supply voltage between 1 and
(Refer to the name plate.)
(Check the primary and secondary voltage of the
transformer.)
Check the fluctuating voltage between and .
(15

60VDC)

~

Check to see if the fuse blows out.

FUSE

(Check the R04 of the varistor.)

3.15A

Check the voltage at the No.4 pin on CN13 connector
of the infrared receiver.

DC5V

(Check the transformer and the power supply circuit
of the rated voltage.)

Check the voltage at the white lead of the louver
motor.
(Check the transformer and the power supply circuit
of the rated voltage.)

Check the voltage at the No.1 pin on CN10
connector.
(Check the DB01, R05 and C03.)

Refer to the service data for the detailed failure
diagnosis.

Diagnosis Result

2

2

.

3

– 5 –

FILE NO. SVM-06036

4. SPECIFICATIONS OF ELECTRICAL PARTS

RAS-M10GKV-E2, RAS-M13GKV-E2
RAS-M10GKCV-E2, RAS-M13GKCV-E2

No. Parts name Type Specifications

1 Fan motor (for indoor) SKF-220-20-4A-1 AC Motor with 150°C thermo fuse
2 Thermo. sensor (TA-sensor) ——— 10 kΩ at 25°C
3 AC-AC transformer (T01) TT-10 187 − 276V, 6VA
4 Microcomputer
5 Heat exchanger sensor

(TC-sensor)
6 Line filter (L01) SS11V-06270 27 µH , AC 0.64A
7 Diode (DB01) KBP06M 1.5A, 420V
8 Capacitor (C50)
9 Fuse (F01) BET 3.15A 250VAC T3.15A, 250 V

10 Regulator IC (IC08) NJM7812 12VDC, 1.5A max

11 Regulator IC (IC11) NJM7805 5VDC, 1.5A max

12 Varistor (R21, R109) TND15G561K 560 V

µPD780024AGK

——— 10 kΩ at 25°C

LXV35VB2200MJ20 2200 µF, 35V

13 Louver motor 24BYJ48 DC 12V

RAS-M16GKV-E2, RAS-M16GKCV-E2

No. Parts name Type Specifications

1 Fan motor (for indoor) ICF-340-30-2 DC 340 V, 30 W
2 Thermo. sensor (TA-sensor) ——— 10 kΩ at 25°C
3 DC-DC transformer (T01) SWT-70 DC 390 V, Secondary DC 15 V, 12 V, 7 V
4 Microcomputer µPD780024AGK
5 Heat exchanger sensor

(TC-sensor)
6 Line filter (L01) SS11V-06270 27mH, AC 0.6A
7 Diode (DB01) D3SBA60 4A, 600 V
8 Capacitor (C03) KMH450VSSN120M25C 120µF, 450 V
9 Fuse (F01) FCU250V, 3.15A T3.15A, 250 V

10 Power supply IC (IC01) STR-L472
11 Varistor (R21, R109) TND15G561K 560 V

——— 10 kΩ at 25°C

12 Resistor (R01) RF-5TK4R7 4.7Ω, 5 W

13 Louver motor 24BYJ48 12VDC

– 6 –

5. CONTROL BLOCK DIAGRAM

FILE NO. SVM-06036

5-1. Indoor Unit

Heat Exchanger Sensor

Temperature Sensor

Infrared Rays Signal Receiver

Infrared

Rays

Remote

Control

Initiallizing Circuit

Clock Frequency
Oscillator Circuit

Power Supply

Circuit

Noise Filter

Indoor Unit Control Panel

M.C.U.

Functions

• Louver Control

• 3-minute Delay at Restart for Compressor

• Motor Revolution Control

• Processing

(Temperature Processing)

• Timer

Outdoor unit

ON/OFF Signal

Louver ON/OFF Signal

Louver Driver

Operation

Display

Timer

Display

Filter Sign

Display

Fan Only

Sign Display

Indoor Fan

Motor

Louver Motor

From Outdoor Unit

REMOTE CONTROLLER

RAS-M10GKV-E2, RAS-M13GKV-E2, RAS-M16GKV-E2

(Heat pump model)

Infrared

Rays

Remote Controller

Operation ( )

Operation Mode Selection

AUTO, COOL, DRY, HEAT

Thermo. Setting

Fan Speed Selection

ON TIMER Setting

OFF TIMER Setting

Louver AUTO Swing

Louver Direction Setting

Outdoor Unit

RAS-M10GKCV-E2, RAS-M13GKCV-E2, RAS-M16GKCV-E2

(Cooling only model)

Infrared

Rays

Remote Controller

Operation ( )

Operation Mode Selection

AUTO, COOL, DRY, FAN ONLY

Thermo. Setting

Fan Speed Selection

ON TIMER Setting

OFF TIMER Setting

Louver AUTO Swing

Louver Direction Setting

ECONO.

ECONO.

– 7 –

6. OPERATION DESCRIPTION

FILE NO. SVM-06036

6-1. Outline of Air Conditioner Control

This air conditioner is a capacity-variable type air
conditioner. The capacity proportional control

compressor which can change the motor speed is
mounted. The indoor unit motor drive circuit is
mounted to the indoor unit. The compressor and the
inverter to control outdoor unit motor are mounted to
the outdoor unit. The entire air conditioner is mainly
controlled by the indoor unit controller.

The indoor unit controller drives the indoor f an motor
based upon command sent from the remote control­ler, and transfers the operation command to the
outdoor unit controller.

The outdoor unit controller receives operation
command from the indoor unit side, and controls the
outdoor fan and the pulse modulating valve.

Besides, detecting rev olution position of the com­pressor motor, the outdoor unit controller controls
speed of the compressor motor by controlling output
voltage of the inverter and switching timing of the
supply power (current transfer timing) so that motors
drive according to the operation command.
And then, the outdoor unit controller transfers
reversely the operating status information of the
outdoor unit to control the indoor unit controller.

As the compressor adopts four-pole
brushless DC motor, the frequency of the
supply power from inverter to compressor
is two-times cycles of the actual number of
revolution.

(1) Role of indoor unit controller

The indoor unit controller judges the operation
commands from the remote controller and
assumes the following functions.

• Judgment of suction air temperature of the
indoor heat exchanger by using the indoor
temp. sensor .

• Temperature setting of the indoor heat ex­changer by using heat exchanger sensor
(Prevent-freezing control)

• Louver motor control

• Indoor fan motor operation control

• LED display control

• Transferring of operation command signal
(Serial signal) to the outdoor unit

• Reception of information of operation status
(Serial signal including outside temp. data) to
the outdoor unit and judgment/display of error

(2) Role of outdoor unit controller

Receiving the operation command signal (Serial
signal) from the indoor controller, the outdoor
unit performs its role.

• Compressor operation
control

• Operation control of
outdoor fan motor

•

P.M.V. control

• Detection of inverter input current and current
release operation

• Over-current detection and prevention opera­tion to transistor module (Compressor stop
function)

• Compressor and outdoor fan stop function
when serial signal is off (when the serial signal
does not reach the board assembly of outdoor
control by trouble of the signal system)

• Transferring of operation information (Serial
signal) from outdoor unit to indoor unit

• Detection of outdoor temperature and opera-
tion rev olution control

• Defrost control in heating operation (Temp.
measurement by outdoor heat exchanger and
control for 4-way valve and outdoor fan)

(3) Contents of operation command signal (Serial

signal) from indoor unit controller to outdoor unit
controller

The following three types of signals are sent
from the indoor unit controller.

• Operation mode set on the remote controller

• Compressor revolution command signal

defined by indoor temperature and set tem­perature
(Correction along with variation of room
temperature and correction of indoor heat
exchanger temperature are added.)

• For these two types of signals ( [Operation
mode] and [Compressor revolution] ), the
outdoor unit controller monitors the input
current to the inverter, and performs the
followed operation within the r ange that current
does not exceed the allowable value.

• Temperature of indoor heat exchanger by
indoor heat exchanger sensor
(Minimum rev olution control)

Operations followe d





to judgment of
serial signal from



indoor side.



− 8 −

FILE NO. SVM-06036

(4) Contents of operation command signal (Serial

signal) from outdoor unit controller to indoor unit
controller

The following signals are sent from the outdoor
unit controller.

• The current operation mode

• The current compressor revolution

• Outdoor temperature

• Existence of protective circuit operation
For transferring of these signals, the indoor unit

controller monitors the contents of signals, and
judges existence of trouble occurrence.

Contents of judgment are described below.

• Whether distinction of the current operation

status meets to the operation command
signal

• Whether protective circuit operates

When no signal is received from the outdoor
unit controller, it is assumed as a trouble.

6-1-1. Capacity Control

The cooling capacity is varied by changing compres­sor motor speed. The inverter changes compressor
motor speed by changing AC 220–240V power to
DC once, and controls capacity by changing supply
power status to the compressor with transis-tor
module (includes 6 transistors). The outline of the
control is as follows : The revolution position and
revolution speed of the motor are detected by
detecting winding electromotive force of the com
pressor motor under operation, and the revolution
speed is changed so that the motor drives based
upon revolution speed of the operation command by
changing timing (current transfer timing) to ex
change inverter output voltage and supply power
winding.

Detection of the revolution position for controlling is
performed 12 times per 1 revolution of compressor.

The range of supply power frequency to the com
pressor differs according to the operation status
(COOL, DRY).

Table 6-1-1 Compressor revolution range

Operation

mode

COOL

No. of

operating

unit

1 unit

2 units

3 units

4 units

Combination

of indoor units

M10

M13

M16

*

*

*

Compressor

revolution

(rps)

20 to 28

20 to 43

20 to 53

20 to 66

31 to 69

31 to 69

* In case that any multiple indoor units are combined.

6-1-2. Current Release Control

The outdoor main circuit control section (Inverter
assembly) detects the input current to the outdoor
unit. If the current value with compressor motor
speed instructed from indoor side exceeds the
specified value, the outdoor main circuit control
section controls compressor motor speed by reduc­ing motor speed so that value becomes closest to
the command within the limited value.

Operation

mode

HEAT

No. of

operating

unit

1 unit

2 units

3 units

4 units

Combination

of indoor units

M10

M13

M16

*

*

*

Compressor

revolution

(rps)

15 to 52

15 to 63

15 to 67

15 to 90

17 to 90

22 to 90

6-1-3. Power Factor Improvement Control

Power factor improvement control is performed
mainly aiming to reduce the current on much power
consumption of cooling/heating operation. Control­ling starts from the time when input power has
reached at a certain point. To be concrete, IGBT of
the power factor improvement circuit is used, and the
power factor is improved by keeping IGBT on for an
arbitrary period to widen electro-angle of the input
current.

− 9 −

FILE NO. SVM-06036

6-1-4. Prevent-Freezing Control

The indoor heat exchanger sensor detects refriger­ant vapor temperature in COOL/DRY operation. If
the temperature is below the specified value, com­pressor motor speed is reduced so that operation is
performed in temperature below the specified value
to prevent-freezing of indoor heat exchanger.

6-1-5. P. M. V. (Pulse Modulating Valve)

Using P.M.V., refrigerant flow of refrigeration cycle is
varied for the optimum temperature. Controlling
each unit separately by four P.M.V. corresponds to
difference of pipe length, fan speed, and unit tem­perature.

If an error occurs on cycle temperature when power
source of the air conditioner has been turned on,
and if start/stop times of the outdoor unit are 30
times, move the valve once until it hits on the stopper
for positioning of the valve. In this case, ticktack
sound may be heard.

6-1-6. Louver Control

(1) Vertical air flow louvers

Positions of vertical air flow louvers are automati­cally controlled according to the operation status
(AUTO, COOL, DRY, HEAT). Besides, positions of
vertical air flow louvers can be arbitrarily set by
pressing the [FIX] button. The louver position which
has been set by the [FIX] button is stored in micro­computer, and the louver is automatically set at the
stored position in the next operation.

(2) Swing

If the [SWING] button is pressed during running
operation, vertical air flow louvers start swinging.
When the [SWING] button is pressed again, swinging
stops.

6-1-7. Indoor Fan Control

The indoor fan is operated by motor speed non-step
variable drive system motor. For flow rate, motor
speed is controlled manually in five steps and with
the unit of 10 rpm from upper limit to lower limit in
AUTO mode as described in Table 6-1-2. It is not
selected by relay, so selecting sound does not
generate.

operation

mode

Cooling

and Fan

only

DRY

Heating

Table 6-1-2

Fan

mode

H
M+

M

L+
L
L­L+
L
L-

UL

SUL

H
M+

M

L+
L
L-

Remote

Control

HIGH

MED+
MED
LOW+

LOW

HIGH

MED+
MED
LOW+

LOW

Motor speed

(rpm)

M10

Air flow rate

(m3/h)

1190

1120
1120
1050

980
930

910
850
930
910
850
720

660
1250
1200
1160
1060

1000

1050

940
930

570
530
530

490

440

420

410

370

420
410
370
290
260
610
570
550
490
460
490

420
420

Motor speed

(rpm)

1210

M13

Air flow rate

1130
1130
1050

980
930
910
850
930
910
850
750

700
1290
1280
1200
1100

1020
1050

940
930 420

(m3/h)

590
530
530
490
440
420

410
370
420

410
370
310
280

620

620

570
520
470
490

420

M16

Motor speed

(rpm)

Air flow rate

1350

1250
1250
1150

1070

1000

980
920 410

1000

980
920
920
800

1370

1360
1280
1180

1100

1150
1020

1000 460

(m3/h)

650
610
610
550
500
460

440

460
440

410
410
340

660
660
620

560
520
550

470

NOTE :

• UL : Ultra Low, SUL : Super Ultra Low

− 10 −

FILE NO. SVM-06036

6-1-7. Outdoor Fan Control (DC Fan Motor)

Although the outdoor fan motor drives the outdoor fan by non-step variable system of the revolution speed, the
revolution speed is restricted to three steps on the convenience of controlling.

If a strong wind is lashing outside of the room, the operation may be continued as the outdoor fan stops in order
to protect the outdoor fan motor.

If a fan lock occurred due to entering of foreign matter, the air conditioner stops and an alarm is displayed.

<COOL, DRY>

Table 6-1-3

Compressor revolution (rps)

Outdoor temp.

sensor

TO

ECONO.

operation

TO ≥ 38°C

TO < 38°C

TO ≥ 38°C

TO < 38°C

TO is abnormal

1 to 2 units
3 to 4 units

20.3

390 (rpm) 700 (rpm) 700 (rpm) 700 (rpm)
390 (rpm) 640 (rpm) 640 (rpm) 700 (rpm)
390 (rpm) 500 (rpm) 640 (rpm) 700 (rpm)
390 (rpm) 640 (rpm) 640 (rpm) 640 (rpm)
390 (rpm) 500 (rpm) 500 (rpm) 500 (rpm)
500 (rpm) 640 (rpm) 640 (rpm) 640 (rpm)

~ 50.3 ~ 62.8 63.4 ~

<HEAT>

Table 6-1-4

Compressor revolution (rps)

Outdoor temp. sensor TO ≥ 5°C

TO TO < 5°C

ECONO. operation

TO ≥ 5°C
TO < 5°C

TO is abnormal

20.3 ~ 33.3 ~ 33.9

390 (rpm) 640 (rpm) 640 (rpm)
500 (rpm) 640 (rpm) 640 (rpm)
390 (rpm) 500 (rpm) 500 (rpm)
390 (rpm) 500 (rpm) 500 (rpm)
390 (rpm) 500 (rpm) 640 (rpm)

6-2. Description of Operation Circuit

• Turning [ON] the breaker flashes the operation lamp.
This is the display of power-ON (or notification of po wer failure).

• When pushing [ ] button of the remote controller, receive sound is issued from the main unit, and
the next operations are performed together with opening the vertical air flow louvers.

6-2-1. Fan Only Operation

(The Remote controller [MODE] Button
is Set to the FAN ONLY Operation)

• This mode is only for the cooling only model.

• Once the setting is made, the operation mode is
memorized in the microcomputer so that the same
operation can be effected thereafter simply by
pushing [ ] button.

• When the [FAN] button is set to the AUTO position,
the indoor fan motor operates as shown in Fig. 6­2-1. When the [FAN] button is set to LOW, LOW
MED, MED+, or HIGH, the motor operates with a
constant air flow.

• ECONO, Hi POWER and COMFORT SLEEP

mode cannot be set.

+

− 11 −

˚C

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

(Room temp.) – (Set temp.)

Set
temp.

0

(Set temp.) 25˚C

NOTE :

1: Calculated from difference in motor speed of M+

*

and L–, and controlled.

Fig. 6-2-1 Auto setting of air flow

M+
*1
*1
*1
L–

FILE NO. SVM-06036

6-2-2. Cooling Operation

(The Remote controller [MODE] Button
is Set to the COOL Position)

• Once the setting is made, the operation mode is
memorized in the microcomputer so that the same
operation can be effected thereafter simply by
pushing [ ] button.

• A cooling operation signal is transmitted to outdoor
unit.

• The indoor fan motor operates as shown in Fig.6­2-2 when [FAN] button is set to AUTO.

• The motor operates with a constant air flow when
the [FAN] button is set to LOW, LOW+, MED, MED+,

or HIGH.

• The outdoor unit controls the outdoor fan relay

R01, R02 and R03, and the compressor motor
speed according to the operation command signal

sent from the indoor unit.

˚C

+3

+2.5

+2

+1.5

+1

(Room temp.) – (Set temp.)

+0.5

Set
temp.

0
–0,5

NOTE :

1: Calculated from difference in motor speed of M+

*

and L–, and controlled.

Fig. 6-2-2 Setting of air flow [Air Flow AUTO]

M+

*1

*1

*1
L–

In normal
operation

(1) Cooling capacity control

• The cooling capacity and room temperature
are controlled by changing the compressor
motor speed according to both the difference
between the temperature detected by the room
temperature sensor and the temperature set by
[TEMP] button and also any change in room
temperature.

• When compressor has been activated or
reactivated, it operates with Max. 33 rps for 2
minutes and with Max. 57 rps from 2 to 4
minutes passed.

• When room temperature is lower than set
temperature and indoor fan motor is operated
at fan speed L– as shown in Fig. 6-2-2 while
the outdoor unit stops.

(2) Prevent-freezing control

If temperature of indoor heat exchanger detected
by the indoor heat exchanger sensor is 5°C or
lower, compressor motor speed is gradually
lowered to pre vent freezing of the indoor heat
exchanger. If temperature is 7°C or higher, return
the operation to the above item (1).

(3) Current release control

The input current of compressor and outdoor fan
motor (Precisely inverter main circuit control
section) which occupy most of air conditioner
input is detected by the outdoor current sensor ,
and compressor motor speed is gradually lowered
so that current value does not exceed 11.5A if
current value exceeds 11.5A. When the current
value lowers to 11.0A, return the operation to the
above item (1).

Comp. motor

14.2

13.7

Current value

Normal control

speed down

Comp. motor
speed keep

Fig. 6-2-3

(4) Outdoor temperature release control

The outdoor temperature release is controlled by
changing the current release points 14.2 and 13.7
in the above item according to temperature
detected by the outdoor temperature sensor.

For example, if the outdoor temperature is 43°C,
the value of current release points becomes 9.6A.

− 12 −

FILE NO. SVM-06036

(5) Limit for maximum compressor motor speed

by indoor fan speed

When outdoor temperature sensor detected
32°C or lower, and indoor heat exchanger
sensor detected 17°C or lower, the maximum
compressor motor speed is limited by the indoor
fan speed.

For example, when 1 unit only operates, the
compressor motor speed is limited as described
in the table below.

Table 6-2-1

Air flow

rate

HIGH

M+

MED

L

L–

UL

SUL

M10 M13 M16

(rps) (rps) (rps)

32 48 54
29 42 46
24 28 38
20 20 30
20 20 30
20 20 20
20 20 20

(6) Louver control

The vertical air flow louvers are automatically set
to horizontal or cool memory position.

When temperature of indoor heat exchanger
becomes 5°C or lower by the prevent-freezing
control and the compressor is turned off, the
vertical air flow louvers close once and then
return to the position of previous time.

(7) Discharge temperature control

The discharge temperature of refrigerant gas
from the compressor is detected by the dis­charge temperature sensor, and controls operat­ing compressor motor speed.

1) Control 1 (A zone) : Normal operation zone

When TD detect value is 101°C or lower, the
operation is performed with operating motor
speed instructed by the serial signal.

2) Control 2 (B zone) : Slow-up zone of motor

speed
When TD detect value is 101°C or higher,

operating motor speed is slowly up.

3) Control 3 (C zone) : Keep zone

When TD detect value is 108°C or higher,
operating motor speed is not changed if
raising operation speed.

4) Control 4 (D zone) : Slow down zone of motor

speed
When TD detect value is 111°C or higher,

operating motor speed is slowly down.

5) Control 5 (E zone) : Normal down of motor

speed
When TD detect value is 115°C or higher,

operating motor speed is down.

6) Control 6 (F zone) : Operation stop zone

If TD detect value exceeds 120°C during
operation, stop the operation immediately.

Then, restart the operation when TD detect
value becomes 108°C or lower.

TD

(˚C)

120

115

111

108

101

Zone

F

E

D

C

B

A

Operation stop zone

Normal down zone of motor speed

Slow down of motor speed

Keep zone : Motor speed is not changed.

Slow-up zone of motor speed

Normal operation zone

Fig. 6-2-4 Compressor motor speed control

– 13 –

Release of motor speed

FILE NO. SVM-06036

(8) ECONO operation control

When the [ECO] button is pushed, ECONO
operation is performed by restraining air flow

and compressor motor speed. The set
temperature is changed also.

1) The set temperature increased 0.5°C per hour up
to 2°C starting from the set temperature when
ECONO has been received.

2) Indoor air flow is controlled between L+ and UL.
The compressor motor speed in control as shown
in Fig. 6-2-5

(9) COMFORT SLEET operation control.

When the [COMFORT SLEEP] button is
pushed, the ECONO operation activate
together with the timer OFF function. Each

time of pressing [COMFORT SLEEP] button
the off timer setting changes in the sequence
of 1, 3, 5 or 9 hours.

Fig. 6-2-5

(10) Hi POWER operation control.

When the [Hi POWER] button is pushed

Hi Power operation is performed by change
set temperature and air flow (display on the

remote control does not change).

1) Changing of set temperature.

Fig. 6-2-6

− 14 −

FILE NO. SVM-06036

–0.5

0

+0.5

+1.0

+1.5

+2.0

+2.5

*1

L–

SUL

(Room temp.) – (Set temp.)

Set
temp.

2) Changing of air flow (Fan setting : AUTO)
When the Hi POWER is started, the fan of the

indoor unit operates at higher air flow level than
normal air flow AUTO (normal air flow AUTO
is shown in Fig. 6-2-2). Because of the

difference between room temperature and set
temperature are increased automatically.

3) Changing of air flow (Fan setting : One of 5
levels)
When the Hi POWER is started, the fan of the

indoor unit operates at higher consecutive air

flow level. (Fan speed on the display of remote
control does not change)

4) Changing of louver position
If the room temperature is higher than setting
temperature by 3.5 °C or more, the louver is

automatically set to the maximum air flow

position. If it is not, position of louver is not
change. When room temperature is reach to

setting temperature. The louver moves back
to set position.

(11) Quiet operation control.

When the [QUIET] button is pushed, the fan is

restricted the revolution speed at L- level until

the [QUIET] button is pushed once again

(cancel QUIET operation).
Remarks :

QUIET operation is appropriate to work with
less cooling load condition. Because of the
fan speed L- may cause not enough the
cooling capacity.

6-2-3. DRY Operation

(The Remote controller [MODE] Button
is Set to the DRY Position)

• Once the setting is made, the operation mode is

memorized in the microcomputer so that the same
operation can be effected thereafter simply by
pushing [ ] button.

• Dry operation signal is transmitted to outdoor unit.

• The Cooling operation giving priority to dehumidi-

fying, which restrains the indoor fan speed and
compressor motor speed, is performed.

• The indoor fan motor operates as shown in Fig.
6-2-7. (Fan speed is AUTO only.)

• The outdoor unit controls the outdoor fan relay

R01, R02 and R03, and the compressor motor
speed according to the operation command signal
sent from the indoor unit.

NOTE :

1 : Middle motor speed between L– and SUL

*

Fig. 6-2-7 Setting of air flow

(1) Dehumidifying-preferential Cooling capacity

control

• The cooling capacity and room temperature are
controlled by changing the compressor motor
speed according to both the difference between
the temperature detected by the room temperature
sensor and the temperature set by [TEMP] button
and also any change in room temperature.

• When the air conditioner operates in Dry mode, the
maximum compressor motor speed is restricted.

M10 : Max. 20 rps
M13 : Max. 20 rps
M16 : Max. 22 rps

While multiple indoor units operate, compressor
motor speed is calculated in the outdoor unit to
operate.

• When room temperature is lower than set tempera­ture, indoor fan motor is operated at f an speed SUL
as shown in Fig. 6-2-7 while the outdoor unit stops.

• ECONO Hi POWER, QUIET and COMFORT-

SLEEP mode cannot be set.

• Other controls than the above-mentioned controls

are common to those of cooling operation.

− 15 −

6-2-4. Heating Operation

33

*

3

*

2

32

44
43

20
19

31
30

A

A

−

8

A + 4
A − 8

HIGH

SUL

SUL

FAN

AUTO

Starting
of FAN
Manual

Approximate
revolution speed
of HIGH and SUL
linear by Tc.

Stop

( NOTE : *1)

Transferring of heating operation signal from indoor
unit to outdoor unit starts.

The indoor fan motor operates by the room tempera­ture when selecting "AUTO" of "FAN" as shown in
Fig. 6-2-8, and operates with a set air flow when
selecting LOW to HIGH.

Howe ver, to prevent cold draft, revolution speed of
the fan is restricted by indoor heat exchanger when
air flow is AUTO (Fig.

6-2-9) and sta

rting of FAN

Manual.

[Basic control]

(3) SUL : Super ultra low

[In star ting and in stability]

In star ting

• Until 12 minutes
passed after
operation start

FAN
AUTO

• When 12 to 25
minutes passed
after operation start
and room temp. is
3°C or lower than
set temp.

FILE NO. SVM-06036

In stability

• When 12 to 25
minutes passed
after operation start
and room temp. is
higher than (set
temp. --3°C)

• When 25 minutes or
more passed after
operation start

Set
temp.

−

(Room temp.)

1, *2 :Approximate revolution speed of M+ and L to

*

−0.5

−

1

−

1.5

−

2

(Set temp.)

−

5.0

−

5.5

[FAN AUTO]

0

LOW

1

*

2

*

M+

HIGH

linear according to temperature.

Fig. 6-2-8 Setting of air flow

[Cold draft preventing control]

The upper limit of fan revolution speed is shown
below.

FAN
Manual

• Room temp.≥ 
Set temp. − 4°C

• Room temp. >
Set temp. − 3,5°C

The outdoor unit controls the outdoor fan based
upon the operation signal sent from the indoor unit,
and also controls revolution speed of the compres­sor motor.

The power coupler (IC20) for four-way valve is
turned on, and turned off in defrost operation.

(1) Heating capacity control

Calculate the difference between temperature
detected by room temp . sensor every minute and
the set temp. set on "Temp. indicator" and
variation amount of room temp.

Then, obtain the correction amount of the
command signal, and correct the current fre­quency command signal.

(2) High-temp. release control

If temperature of the indoor heat exchanger
detected by the indoor heat exchanger sensor is
55°C or higher, compressor motor speed is
gradually lowered to prevent over-temp. rising of
compressed pressure.

If temperature becomes below 48°C, return to
above item (1).

Fig. 6-2-9 Cold draft preventing control

NOTES :
(1) Stops for 2 minutes after thermostat-OFF.
(2) 24°C when the set temp. is 24°C or more

Set temp. when the set temp. is below 24°C

(3) Current release control

The input current of compressor and outdoor fan
motor (Precisely inverter main circuit control
section) which occupy most of air conditioner
input is detected by the outdoor current sensor.
The compressor motor speed is lowered gradu­ally according to the range of TO (outside air
temp.) if the input current exceeds the current
value determined in each zone as shown in Fig.
6-2-10 so that the input current does not exceed
the set value.

In case that the current lowered by appro x. 0.3A to

0.5A than each set value, return to above item (1).

− 16 −

TO

16.0

15.5

11.0

10.5

Outside air temp. (°C)

(4) Defrost control

1) Detection of frost
In heating operation, time duration while the

compressor operates is counted, and defrost
operation starts by any condition described
below.

a. The counted time is 28 minutes or more,

and status that temperature of the outdoor
heat exchanger detected by the outdoor
heat exchanger is − 20°C or lower contin­ued for 3 minutes or more.

b. The counted time is 28 minutes or more,

and status that temperature of the outdoor
heat exchanger detected by the outdoor
heat exchanger is − 8°C or lower and
temperature lowered by 2.5 °C than the
minimum value of the outdoor heat ex­changer during 10 to 15-minutes count
time continued for 3 minutes or more.

c. The counted time is 34 minutes or more,

and status that temperature of the outdoor
heat exchanger detected by the outdoor
heat exchanger is − 5°C or lower and
temperature lowered by 3.0 °C than the
minimum value of the outdoor heat ex­changer during 10 to 15 minutes count
time continued for 3 minutes or more.

d. The counted time is 4 hours or more, and

status that temperature of the outdoor heat
exchanger detected by the outdoor heat
exchanger is 0°C or lower and temperature
lowered by 1.0 °C than the minimum value
of the outdoor heat exchanger during 10 to
15 minutes count time continued for 3
minutes or more.

e. If the following three conditions are satis-

fied, defrost operation (Timer defrost)
starts after heating operation for 48
minutes.

1

Setting on remote control, HEAT

(mode), HIGH (Fan), 30°C (temp.).

2

Room temp. is 19°C to 24°C, and

outside air temp. is 5°C or lower.

Fig. 6-2-10

10.8A

10.3A

9.8A

FILE NO. SVM-06036

3

Defrost operation has been already
performed once.

2) Defrost operation
Operation of the compressor is stopped

once, turn off power coupler f or four-way
valve after 10 seconds, and then exchange
the four-wa y v alv e .

After 20 seconds, restart operation of the
compressor. Turn off the outdoor fan just
when the compressor stopped.

If temperature of the indoor heat exchanger
lowered than 38°C, stop the indoor fan.

3) Defrost reset
Resetting operation from defrost to heating is

performed when any one of the following
conditions is satisfied.

a. Temperature of the outdoor heat ex-

changer rose to +8°C or higher.

b. A status that temperature of the outdoor

heat exchanger is +5°C or higher contin­ued for 80 seconds.

c. Defrost operation continued for 10 min-

utes.

In resetting defrost operation, the compressor
stops for 50 seconds if defrost has started
under condition a. to d. in item 1), but the
compressor is reset to heating operation
keeping operated if defrost has started under
condition e. in item 1).

(5) Louver control

The vertical air flow louvers are automatically
set to heating position or heat memory position.

When the compressor is turned off by high­temp. release control, the vertical air flow

louvers close once and then return to the
position of previous time.

(6) ECONO operation control.

When the [ECO] button is pushed, ECONO
operation is performed by restraining air flow and

compressor moter speed.

1) The indoor fan speed is controlled within L­as maximum speed.

2) Compressor motor speed is controlled by the
difference value of room temperature and set

temperature as shown in Fig. 6-2-11
The different value of room temperature and

set temperature are separated to A, B and
C zone. Then compressor motor speed in each
zone are controlled by different speed.

− 17 −

After 30 minutes passed, the different value of

room temperature and set temperature is
separated zone again by more different value

than before. Then compressor motor speed

after 30 minute passed is lower than before by
the same different value of room temperature
and set temperature.

FILE NO. SVM-06036

Fig. 6-2-11

(7) COMFORT SLEEP operation control.

When the [COMFORT SLEEP] button is pushed,
the ECONO operation actrvate together with the

timer OFF function. Each time of pressing
[COMFORT SLEEP] button the off timer setting

changes in the sequence of 1, 3, 5 or 9 hours.

(8) Hi POWER operation control.

When the [Hi POWER] button is pushed Hi Power
operation is performed by changing setting

temperature and air flow (display on the remote
control does not change).

1) Changing of setting temperature.

2) Changing of air flow (Fan setting : AUTO)

When the Hi POWER is started, the fan of the

indoor unit operates at higher air flow level than

normal air flow AUTO (normal air flow AUTO is
shown in Fig. 6-2-8). Because of the difference
between room temperature and setting
temperature are increased automatically.

3) Changing of air flow (Fan setting : One of 5 levels)

When the Hi POWER is started, the fan of the

indoor unit operates at higher consecutive air

flow level. (Fan speed on the display of remote
control does not change)

(9) QUIET operation control.

When the [QUIET] button is pushed, the fan is

restricted the revolution speed at L- level until

the [QUIET] button is pushed once again
(cancel QUIET operation).

Remarks :

QUIET operation is appropriate to work with
less heating load condition. Because of the fan

speed L- may cause not enough the heating
capacity.

Fig. 6-2-12

− 18 −

FILE NO. SVM-06036

6-2-5. Auto Operation

(1)

As shown in Fig. 6-2-13, the operation mode
(COOL, DRY, HEAT) is selected according to the
Preset temperature and room temperature when
the operation has started.

−

If room temperature is higher than 1°C of perset
temperature. "Cooling" operation is performed.

−

If room temperture is within 1°C of perset

temperature. "Fan only" operation is performed.
(at UL speed).

−

If room temperture is lower than 1°C of perset
temperture. "Heating operation is performed.

Ta

Cool Operation

Ts+1
Ts
Ts-1

(2) After selecting the operation mode (COOL or

HEAT), select an operation mode again when a
status that the compressor was turned off by the
room temperature continues for 15 minutes.

Fan Only

Heat Operation

Fig. 6-2-13

6-3. Temporary Operation

• Temporary Auto operation, existence of Auto
Restart, and Temporary Cooling operation can be
set by the [RESET] button of the indoor controller.

RESET

Fig. 6-3-1

[RESET] button Control

OFF→ ON Temporary Auto operation start

After pushing button

for 3 seconds

After pushing button Temporary Cooling

for 10 seconds operation start

6-3-1. Temporary Auto Operation

• When the [RESET] button is pushed, the Auto
operation with set temperature fixed at 24°C
starts. Controlling is same as that of Auto opera­tion by the remote controller.

• When the [RESET] button is pushed again,
the operation stops.

• During Temporary Auto operation, operation by the
remote controller is accepted.

• Using the Auto Restart function, the Temporary
Auto operation starts when power failure is reset.

Auto Restart control select

6-3-2. Temporary Cooling Operation

• When the [RESET] button keeps
pushed for 10 seconds, Cooling operation of which
compressor motor speed and the indoor fan speed
are fixed starts.

Compressor motor speed : 24.5 rps
Indoor fan speed : Low

• When the [RESET] button is
pushed again, the operation stops.

• Auto Restart function is unavailable.

− 19 −

FILE NO. SVM-06036

6-4. Auto Restart Function

The indoor unit is equipped with an automatic
restarting function which allows the unit to restart
operating with the set operating conditions in the event
of 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.

6-4-1. How to set 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.
Push the [RESET] button located in the center
of the front panel continuously for 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 on standby (Not operating)

Operation Motions

Push [RESET] button for more The unit is on standby.
than three seconds.

¯

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

¯

RESET

0

3S

The unit beeps three times The lamp changes from
and continues to operate. green to orange.

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

After approx. three seconds,

When the unit is in operation

Operation Motions

Push [RESET] button for more The unit is in operation. The green lamp is on.
than three seconds.

¯

The unit stops operating. The green lamp is turned off.

After approx. three seconds,

¯

RESET

0

3S

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

button once more or use the remote control to turn it on.

·

While this function is being set, if the unit is in

·

operation, the orange lamp is on.

·

This function can not be set if the timer operation

has been selected.

·

When the unit is turned on by this function, the

While the filter check lamp is on, the
[RESET] button has the function of filter
reset button.

louver will not swing even though it was swinging
automatically before shutting down.

-

20

-

6-4-2. How to cancel auto restart function

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

When the unit is on standby (Not operating)

Operation Motions

Push [RESET] button for more The unit is on standby.
than three seconds.

¯

The unit starts to operate. The orange lamp is on.

¯

RESET

0

3S

The unit beeps three times The lamp changes from
and continues to operate. orange to green.

¯

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

FILE NO. SVM-06036

After approx. three seconds,

When the unit is in operation

Operation Motions

Push [RESET] button for more The unit is in operation. The orange lamp is on.
than three seconds.

¯

The unit stops operating. The orange lamp is turned off.

After approx. three seconds,

¯

RESET

0

3S

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

button once more or use the remote control to turn it on.

·

While this function is being set, if the unit is in

6-5. Filter Check Lamp

operation, the orange lamp is on.

When the elapsed time reaches 1000 hours, the filter

6-4-3. Power failure during timer operation

check lamp indicates. After cleaning the filters, turn off
the filter check lamp.

When the unit is in Timer operation, if it is turned off
because of power failure, the timer operation is

6-5-1. How to turn off filter check lamp

cancelled. Therefore, set the timer operation again.

Push [RESET] button on the indoor unit.

Note:

If [RESET] button is pushed while the filter
check lamp is not indicating, the indoor unit will start
the Automatic Operation.

- 21 -

6-6. Remote control

6-6-1. Remote control and its functions

RAS-M10UKCV, RAS-M13UKCV, RAS-M16UKCV

11

Infrared signal emitter

1

11

Transmits a signal to the indoor unit.

22

START/STOP button [ ]

2

22

Push the button to start operation.
(A receiving beep is heard.)
Push the button again to stop operation.
(A receiving beep is heard.)
If no receiving sound is heard from the indoor unit,
push the button twice.

33

Mode select button [MODE]

3

33

Push this button to select a mode.
Each time you push the button, a mode is
selected in a sequence that goes from A : Auto
changeover control,

: Heat,

(A receiving beep is heard.)

33

33

4

Temperature butto

.......

c
d

.......

5

Fan speed button [FAN ]

Push this button to select fan speed. When you
select AUTO, the fan speed is automatically
adjusted according to the room temperature.
You can also manually select the desired fan
speed from among five settings.
(LOW

MED

(A receiving beep is heard.)

6

Auto louver button [SWING]

Push this button to swing the louver.
(A receiving beep is heard.)
Push the button again to stop the louver swinging.
(A receiving beep is heard.)

7

Set louver button [FIX]

Push this button to adjust the air flow direction.
(A receiving beep is heard.)

8

On timer button [ON]

Push this button to set the ON timer.

9

Off timer button [OFF]

Push this button to set the OFF timer.

10

Reserve button [SET]

Push this button to reserve setting of time,
ON timer or OFF timer. (A receiving beep is heard.)

11

Cancel button [CLR]

Push this button to cancel ON timer and OFF
timer. (A receiving beep is heard.)

12

Sleep timer button [SLEEP]

Push this button to set the OFF timer.
(1, 3, 5 or 9 hours) (A receiving beep is heard)

13

High power button [Hi POWER]

Push this button to start the high power
operation. (A receiving beep is heard.)

: Fan only, and back to A.

The set temperature is increased up to 30°C.
The set temperature is dropped down to 17°C.

(A receiving beep is heard.)

, LOW

+

+

, HIGH

: Cool,

n [TEMP.]

, MED

: Dry,

,

)

FILE NO. SVM-06036

14

ECO timer button [ECO]

Push this button to start the ECO operation.
(A receiving been is heard)

15

Quiet button [QUIET]

Push this button to start the quiet operation.
(A receiving been is heard)

16

Comfort sleep button [COMFORT SLEET]

Push this button to start the comfort sleep
operation. OFF timer neccessary to set
together (1, 3, 5 or 9 hours). (A receiving been

is heard)

17

PRESET button

Push this button to operate the air conditioner
according to settings memorized. (A receiving

been is heard)
Or push the button for more than 4 seconds

to memorize the setting indicated on the remote
control and

Automatic operation button [AUTO]

18

Push this button to operate the air conditioner
automatically.
(A receiving beep is heard.)

mark is indicated.

1

17
18

2

15

6
7

8

12

5
4
3

16
13

14

11

9

10

− 22 −

FILE NO. SVM-06036

6-6-2. Names and functions of indications on remote control
Display

All indications, except for clock time indication, are indicated by push the [ ] button.

1

Transmission mark

11

1

This transmission mark ( ) indicates when the remote control transmits signals to the indoor unit.

22

Mode display

2

22

Indicates the current operation mode.
(AUTO : Automatic control, A : Auto changeover control, : Cool,

: Dry, : Heat,

Temperature display

3

Indicates the temperature setting (17°C to 30°C).
When you set the operating mode to

setting is indicated.

4

Louver operation display

4

44

Indicates the louver operation. ( : Fix, : Swing ).

FAN speed display

5

Indicates the selected fan speed. AUTO or one of five fan speed levels
(LOW

, LOW

+

can be indicated.
Indicates AUTO when the operating mode is either AUTO or

6

TIMER and clock time display

The time set for timer operation or clock time is indicated.
The present time is always indicated except for TIMER operation.

7

Hi POWER display

Indicates when the Hi POWER operation starts.
Push the [Hi POWER] button to start and push it again to stop
the operation.

PRESET display

8

Flashes for 4 seconds when the [PRESET] button is pushed
and hold to memorize.

mark is indicated when [PRESET] button is pushed than
4 seconds.
Push another button to turn off the mark.

ECO display

9

Indicates when the ECO is in operation.

COMFORT SLEEP display

10

Indicates when the COMFORT SLEEP is in operation.
Each time you push the [COMFORT SLEEP] button, the display

changes in the sequence of 1, 3, 5 or 9h.

11

QUIET display

Indicates when the QUIET is in operation.

c

: Fan only)

, MED

: Fan only, no temperature

, MED

+

, HIGH

: Dry.

10

3

1

)

11

7

•

In the illustration, all indications

are indicated for explanation.
During operation, only the
relevant indications will be
indicated on the remote control.

8

2

9

4

5

6

− 23 −

FILE NO. SVM-06036

7. INSTALLATION PROCEDURE

7-1. Safety Cautions

For general public use

Power supply cord of parts of appliance for Outdoor use shall be more than polychloroprene sheathed flexible cord (design H07RN-F), or cord
designation 245IEC66. (1.5 mm

2

or more)

CAUTION

• THIS AIR CONDTIONER ADOPTS THE NEW HFC REFRIGERANT (R-410A) WHICH DOES NOT DESTROY OZONE LAYER.

R-410A refrigerant is apt to be affected by impurity such as water , oxidizing membrane, and oils because pressure of R-410A refrigerant
is approx. 1,6 times of refrigerant R-22. Accompanied with adoption of the new refrigerant, refrigerating machine oil has been also changed.
Therefore, during installation work, be sure that water, dust, former refrigerant, or refrigerating machine oil does not enter into the refrigerating
cycle or new-refrigerant air coditioner.
To prevent mixin of refrigerant or refrigerating machine oil, the sizes of connecting sections of charging port of the main unit or installation tools are
different from those for the coventional refrigerant. Accordingly, the exclusive tools are required for the new refrigerant (R-410A) as shown below.
For conecting pipes, use new and clean piping materials with high pressure-tight force, which were made fro R-410A only, so that water or dust
does not enter. Moreover, do not use the existing piping because there are problems about pressure-tight forec and inner impurity in the existing
piping.

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.

The installation fuse (25A ) must be used for the power supply line of this air conditioner.

New Refrigerant Air Conditioner Installation

TO DISCONNECT THE APPLIANCE FROM THE MAIN PO WER SUPPLY.

DANGER

• FOR USE BY QUALIFIED PERSONS ONLY.

• TURN OFF MAIN POWER SUPPLY BEFORE ATTEMPTING ANY ELECTRICAL W ORK. 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 BY WRONG WAY, ELECTRIC PARTS
MAY BE DAMAGED.

• CHECK THE EARTH WIRE 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, HEAT REGISTORS, FURNACE, STOVES, ETC.

• WHEN MOVING THE AIR-CONDITIONER FOR INSTALLING IT IN ANOTHER PLACE AGAIN, BE VERY CAREFUL NOT TO GET THE
SPECIFIED REFRIGERANT 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 by by-passing 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.
And, make sure the equipment to be 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 will result in an electrical short.
Do not store 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.

– 24 –

FILE NO. SVM-06036

7-1-1. Installation/Servicing Tools

Changes in the product and components

In the case of an air condition using R-410A, in order to prevent any other refrigerant from being charged accidentally, the service port diameter
of the outdoor unit control valve (3 way valve) has been changed. (1/2 UNF 20 threads per inch)

• In order to increase the pressure resisting strength of the refrigerant piping, flare processing diameter and size of opposite side of flare nuts
has been changed. (for copper pipes with nominal dimensions 1/2 and 5/8)

New tools for R-410A

New tools for R-410A Applicable to R-22 model Changes

As pressure is high, it is impossible to measure by means of conventional gauge .

Gauge manifold

Charge hose

Electronic balance for
refrigerant charging

Torque wrench
(nominal diam. 1/2, 5/8)

Flare tool
(clutch type)

Gauge for projection adjustment

Vacuum pump adapter

Gas leakage detector

In order to prevent any other refrigerant from being charged, each port diameter
has been changed.

In order to increase pressure resisting strength, hose materials and port size
have been changed (to 1/2 UNF 20 threads per inch).
When purchasing a charge hose, be sure to confirm the port size.

As pressure is high and gasification speed is fast, it is difficult to read the
indicated value by means of charging cylinder, as air bubbles occur.

The size of opposite sides of flare nuts have been increased. Incidentally,
a common wrench is used for nominal diameters 1/4 and 3/8.

By increasing the clamp bar's receiving hole, strength of spring in the tool has
been improved.

Used when flare is made by using conventional flare tool.
Connected to conventional vacuum pump. It is necessary to use an adapter to

prevent vacuum pump oil from flowing back to the charge hose.
The charge hose connecting part has two ports-one for conventional refrigerant
(7/16 UNF 20 threads per inch) and one for R410A. If the vacuum pump oil
(mineral) mixes with R-410A a sludge may occur and damage the equipment.

Exclusive for HFC refrigerant.

• Incidentally, the “refrigerant cylinder” comes with the refrigerant designation (R-410A) and protector coating in the U.S's ARI specified rose color
(ARI color code: PMS 507).

• Also, the “charge port and packing for refrigerant cylinder” require 1/2 UNF 20 threads per inch corresponding to the charge hose's port size.

– 25 –

7-2. Installation Diagram of Indoor Units

170 m

m

or m

ore

Hook

65 mm or more

1 Installation

plate

FILE NO. SVM-06036

For the rear left and left
piping

Wall

Before installing the
wireless remote control

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

22

2 Wireless remote control

22

Cover

33

3 Batteries

33

(A

tta

c

h

to

5 Sasa-Zeolite

Vitamin C filter

2

Wireless remote
control

A

ir

f

ilt

e

th

e

fr

o

n

t p

a

n

6Bio-enzyme &

Gingko filter

H

o

o

k

r

e

l.)

8

Pan head wood screw

4

Remote control holder

Insulate the refrigerant
pipes separately with
insulation, not together.

6 mm thick heat resisting
polyethylene foam

170 mm or more

Shield
pipe

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

Do not allow the drain hose
to get slack.

Cut the piping hole
sloped slightly

Make sure to run the drain
hose sloped downward.

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

Right

Rear right

Rear left

Bottom right

Bottom left

Left

− 26 −

7-3-2. Accessory and installation parts

FILE NO. SVM-06036

Part

No.

Part name (Q’ty)

1

Installation plate x 1

2

Wireless remote control x 1

3

Battery x 2

Others

Owner’s manual

Installation manual

Name

Part

No.

Part name (Q’ty)

4

Remote control holder x 1

5

Sasa-Zeolite Vitamin C filter x 1

6

Bio-enzyme & Gingko filter x 1

Part

No.

Part name (Q’ty)

7

Mounting screw ∅4 x 25 x 6

8

Pan head wood screw



∅

3.1 x 16 x 2

l

9

B Label x 1

l

B

This model is not equipped with an extension drain hose.

Option :

For the extension drain hose, use an optionally available RB-821SW or commercially available one.

– 27 –

∅65 mm

100 mm

FILE NO. SVM-06036

7-2-2. 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 which allows easy installation of the piping to the outdoor unit.

•

A place which allows the front panel to be opened.

• The indoor unit shall be installed as top of the indoor unit comes to at
least 2m height.
Also it must be avoided to put anything on the top of the indoor unit.

CAUTION

• Direct sunlight to the indoor unit wireless receiver should be

avoided.

• The microprocessor in the indoor unit should not be too close to

r-f noise sources.
(For details, see the owner's manual.)

Remote controller

• 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

* : Axial distance

Fig. 7-2-1

5 m

45°

5 m

45°

Remote control

* 7 m

(Side view)

7 m

Indoor unit

75°

Reception
range

7-2-3. Cutting a Hole and Mounting Installation Plate

Cutting a Hole

When install the refrigerant pipes from the rear.

Mounting the Installation Plate

Anchor bolt holes

62

82.5

1

Installation
plate

170

85

Pipe hole

Indoor unit

Hook

Hook

Thread

Weight

Hook

7

Mounting screw

Pipe hole

Fig. 7-2-3

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.

Anchor bolt

5 mm dia. hole

Clip anchor
(local parts)

7 Mounting

screw
∅4 x 25 s

Fig. 7-2-4

Projection
15 mm or less

2 m or more from floor

Pipe
hole

The center of the pipe
hole is above the arrow.

Fig. 7-2-2

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.

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 7 mounting screws.

NOTE

• Install the installation plate using 4 to 6 pieces of mounting screw
securing four corners with screws.

7-2-4. 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.

NOTE

• Wire type : More than H07RN-F or 245IEC66 (1.0 mm2 or more)

– 28 –

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 breake 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

• Perform wiring works so as to allow a generous wiring capacity.

7-2-5. Wiring Connection

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.

FILE NO. SVM-06036

-2-6 Piping and Drain Hose Installation

7

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

Die-cutting

Right

Front panel slit

1. Die-cutting Front panel slit

Cut out the slit on the left or right side of the front panel for the left or
right connection and the slit on the bottom left or right side of the front
panel for the bottom left or right connection with a pair of nippers.

2. Changing drain hose

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

How to remove the Drain Cap

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

drain hose

Piping preparation

CAUTION

• Be sure to refer to the wiring system diagram labeled inside the

front panel.

• Check local electrical cords and also any specific wiring instruc-

tions or limitations.

NOTE

• Use stranded wire only.

• Wire type : H07RN-F or more.

Fig. 7-2-5

Fig. 7-2-6

How to install the Drain Hose

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

Heat insulator

Drain hose

Fig. 7-2-7

How to fix the Drains Cap

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

4 mm

Fig. 7-2-8

2)Firmly insert drains cap.

No gap

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

Insert a hexagon wrench (4 mm)

Fig. 7-2-9

CAUTION

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

– 29 –

FILE NO. SVM-06036

In case of right or 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

Fig. 7-2-10

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

Fig. 7-2-11

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 (Ø6.35) 40 mm
(Ø9.52).

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

(To the forefront of flare)

270 mm

170 mm

R30 or less (Ø6.35) R40 or less (Ø9.52) (Use polisin
(polyethylene core or the like for bending pipe.)

43 mm

Liquid side

Gas side

Outward form of indoor unit

7-2-6 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. 7-2-14

• For detaching the indoor unit from the installation plate pull the indoor
unit toward you while pushing its bottom up at the specified parts.

Push

Push

Fig. 7-2-15

7-2-7 Drainage

1.Run the drain hose sloped downwards.

NOTE

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

Do not rise the drain hose.

Do not form the drain hose into the
waved shape.

°

0

Use the handle of screwdriver, etc.

8

Fig. 7-2-12

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

Fig. 7-2-13

• 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

50 mm
or more

Do not put the
drain hose end
into water.

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

Fig. 7-2-16

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

Inside the roomDrain hose

Extension drain hose

Fig. 7-2-17

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.

Space for pipes

Fig. 7-2-18

Wall

Drain
guide

– 30 –

FILE NO. SVM-06036

7-2-8. Setting of Remote Controller Selector

Switch

When two indoor units are installed in the
separated rooms, there is no need to change
the select switches.

Remote Controller Selector Switch

• When two indoor units are installed in the
same room or adjacent two rooms, if operating
a unit, two units may receive the remote
controller signal simultaneously and operate. In
this case, the operation can be preserved by
setting either one indoor unit and remote
controller to B setting
(Both are set to A setting in factory shipment).

• The remote control signal is not received
when the settings of indoor unit and remote
controller are different.

• There is no relation between A setting/B
setting and A room/B room when connecting
the piping and cables.

(1) Stop the operation of the air conditioner and turn

turn off its main power supply.

(2) Pull the air inlet grille toward you to open it and
remove the air inlet grille.

(3) First open the horizontal louver and then remove

the front panel from the back body by pulling it
toward you.

Position of Remote Control Selector Switch

1. Setting of remote controller switch at the
indoor unit side

How to remove the front cabinet

Hooks of front panel (4 points )

Screws

Push

Air filter

Screws

Terminal cover

Fig. 7-2-20

How to mount the front panel

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

Adhesion of B label (When setting to [B])

Be sure to affix the B label on the front panel same
as the below figure.

Fig. 7-2-19

Fig. 7-2-21

– 31 –

FILE NO. SVM-06036

2. Setting of remote controller selector at the
remote controller side

[B] of the remote controller is displayed with
liquid crystal only when it is set to [B].

There is no display of [A].

• Enter the batter.

• Push the [CHK] button by something with thin

edge. ([00] is displayed.)

• If [MODE] button is pushed while pushing [CHK]

button, the small [B] is displayed at the right of the
setting temperature indication section.

To reset [A] setting, push the [MODE] button

*

again while pusing the [CHK] button.

3. Confirm the indoor unit can operate with
the changed setting of the remote control­ler.

7-2-9. Check and Test Operation

1. Check the unit is firmly hooked up on the
installation plate.

2. Check the connecting pipes tightened
securely.

Confirm that there is no gas leakage.

3. Confirm that all connecting cables are
secured and correct.

4. Check the pipes insulation.

5. Check the drainage.

6. Connection of the grounding wire.

7. To switch the TEST RUN (COOL) mode, turn
the switch on.

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

[MODE] button

[CHK] button

RESET

Fig. 7-2-23

8. Operate the unit at cooling operation mode
for fifteen minutes or more .

Measure the temperature of the intake and
discharge air. Ensure the difference between
the intake temperature and the discharge one
is more, than 8°C.

NOTE: Three-minutes protection feature

A protection feature prevents the air
conditioner from being activated for about 3
minutes when it is restarted immediately
after operation or when the power switch is
turned on.

9. Check the remote controller operation.

When finished the check and test operation,
make sure to return to REMOTE CONTROLLER.
(Push the temporary switch with once again.)

– 32 –

10. Explain to the customer on the correct usage
of air conditioner simple layman’s terms.

FILE NO. SVM-06036

8. HOW TO DIAGNOSE THE TROUBLE

The pulse modulating circuits are mounted to both indoor and outdoor units. Therefore, diagnose troubles
according to the trouble diagnosis procedure as described below. (Refer to the chec k points in servicing written
on the wiring diagrams attached to the indoor/outdoor units.)

8-1. First Confirmation

8-1-1. Confirmation of Power Supply

Confirm that the power breaker operates (ON) nor­mally.

8-1-2. Confirmation of Power Voltage

Confirm that power voltage is AC 220 − 240V ± 10%.
If power voltage is not in this range, the unit may not
operate normally.

Table 8-1-1

No.

1

2

Operation of air conditioner

When power breaker is turned "ON", the
operation lamp (Green) of the indoor unit
flashes.

Compressor may not operate even if the
room temperature is within range of
compressor-ON.

8-1-3. Operation Which is not a Trouble

(Program Operation)

For controlling the air conditioner , the prog r am
operations are built in the microcomputer as de­scribed in the following tab le. If a claim is made for
running operation, check whether or not it meets to
the contents in the following table. When it does , we
inform you that it is not trouble of equipment, but it is
indispensable for controlling and maintaining of air
conditioner.

Description

The OPERATION lamp of the indoor unit flashes when
power source is turned on. If [ ] button is operated

once, flashing stops. (Flashes also in power failure)

The compressor does not operate while compressor
restart delay timer (3-minutes timer) operates.
The same phenomenon is found after power source has
been turned on because 3-minutes timer operates.

3

In DRY and ECONO. mode, FAN (air flo w)
display does not change even though FAN
(air flow select) button is operated.

4

Increasing of compressor motor speed
stops approx. 30 seconds after operation
started, and then compressor motor speed
increases again approx. 30 seconds after.

5

The set value of the remote control should
be below the room temperature.

The air flow indication is fixed to [AUTO].

For smooth operation of the compressor, the compressor
motor speed is restricted to Max. 33 rps for 2 minutes and
Max. 57 rps for 2 minutes to 4 minutes, respectively after
the operation has started.

If the set value is above the room temperature, Cooling
operation is not performed. And check whether battery of
the remote control is consumed or not.

8-2. Primary Judgment

To diagnose the troubles, use the following methods.
(1) Judgment by flashing LED of indoor unit
(2) Self-diagnosis by service check remote controller
(3) Judgment of trouble by every symptom

Firstly use the method (1) for diagnosis. Then, use the method (2) or (3) to diagnose the details of troubles.
For any trouble occurred at the outdoor unit side, detailed diagnosis is possible by 5-serial LED on the inverter

P.C. board.

– 33 –

FILE NO. SVM-06036

8-3. Judgment by Flashing LED of Indoor Unit

While the indoor unit monitors the operation status of the air conditioner, if the protective circuit operates, the
contents of self-diagnosis are displayed with block on the indoor unit indication section.

Table 8-3-1

Lamps Self-diagnosis

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, TIMER and FAN ONLY lamps

are blinking.

H OPERATION, TIMER and FAN ONLY lamps

are blinking.

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

• Gas shortage or other refrigerant cycle trouble

• Heat exchanger sensor open, break or short

• Overload relay or thermostat trouble of compressor

Cycle failure

NOTES:

(1) The contents of items B and C and a part of item E are displayed when air conditioner operates.
(2)

When item B and C, and item B and a part of item E occur concurrently, priority is given to the block of item B.

(3) The check codes can be confirmed on the remote controller for servicing.

(4) When connecting the changing kit, first-push priority control is executed. The secondary operation lamp

continues flashing. For details, refer to the section 10. Changing Kit.

– 34 –

8-4. 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.

8-4-1. How to use remote control in service mode

FILE NO. SVM-06036

(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.)

(2) Press [TIMER 8] 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

•

Check the unit with all 35 check codes (00 to 22).
as shown in Table 9-4-1.

• Press [TIMER 9] 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.)

(3) Press [CLR] button. After service finish for clear

service code in memory.

• “7F” is indicated on the display of the remote
control.

1d

02

1E

22

•

Alphanumeric characters are used for the check code.

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

* This illustration in only for Heat pump model.

For Cooling only model, there is not the ( ) symbol.

(4) Press [ ] button to release the service

mode.

• The display of the remote control returns to as it
was before service mode was engaged.

− 35 −

FILE NO. SVM-06036

8-4-2. Caution at Servicing

(1) After servicing, push the [ ] button to return to the normal mode.
(2) After servicing by the check code, turn off breaker of the power supply, and turn on breaker of the pow er

supply again so that memory in the microcomputer returns the initial status. However, the check codes are
not deleted even if the power supply is turned off because they are stored in the fixed memory.

Table 10-4-1

Block distinction

Check

code

Block

Indoor P.C.
board etc.

Not
displayed

Connecting
cable and
serial signal

Check

code

Operation of diagnosis function

Cause of operation

Short-circuit or disconnec­tion of the room tempera­ture sensor (TA sensor).

Coming-off,
disconnection,
short-circuit, or migration
of heat exchanger sensor
(TC sensor)

Lock of indoor fan or
trouble on the indoor fan
circuit

Trouble on other indoor
P.C. boards

Return serial signal is not
sent to indoor side from
operation started.
(1) Defective wiring of

connecting cable

(2) Operation of

compressor thermo.
Gas shortage
Gas leak

Air

conditioner

status

Operation
continues.

Operation
continues.

All off

Operation
continues.

Operation
continues.

Condition

Displayed when
error is detected.

Displayed when
error is detected.

Displayed when
error is detected.

Displayed when
error is detected.

Flashes when
trouble is detected
on Return serial
signal, and normal
status when signal
is reset.

Judgment and action

1. Check the room temp. sensor.

2. When the room temp. sensor is
normal, check P.C. board.

1. Check heat exchanger sensor.

2. When heat exchanger sensor is
normal, check P.C. board.

1. Check P.C. board.

2. When P.C. board is normal, check
the motor.

Replace P.C. board.

1. When the outdoor unit never
operate:

(1) Check connecting cable, and

correct if defective wiring.

(2) Check 25A ( or 30A) fuse (F01)

of outdoor main P.C. board.

(3) Check 3.15A fuse (F04) of

outdoor main P.C. board.

2. To display [Other] block during
operation, check compressor
thermo. operation and supply gas
(check gas leak also).

3. Unit operates normally dur ing
check.
If Return serial signal does not
stop between indoor terminal
board 2 and 3, replace inverter P.C.
board.
If signal stops between indoor
terminal board 2 and 3, replace
indoor P.C. board.

Operation command
signal is not sent to
outdoor side.

Operation
continues.

– 36 –

Flashes when
trouble is detected
on Operation
command signal,
and normal status
when signal is
reset.

If Operation command signal does not
stop between indoor terminal board 2
and 3, replace inverter P.C. board.
If signal stops between indoor
terminal board 2 and 3, replace indoor
P.C. board.

FILE NO. SVM-06036

Block distinction

Check

Block

code

Outdoor P.C.
board

Check

code

Operation of diagnosis function

Cause of operation

Inverter over-current
protective circuit operates.
(Short time)

Position-detect circuit
error or short-circuit
between windings of
compressor

Current-detect circuit
error

Being out of place,
disconnection or short­circuit of outdoor temp.
sensor

Disconnection or short­circuit of discharge temp.
sensor

Air

conditioner

status

All off

All off

All off

All off

All off

Remarkes

Displayed when
error is detected.

Displayed when
error is detected.

Displayed when
error is detected.

Displayed when
error is detected.

Displayed when
error is detected.

Judgment and action

Even if trying operation again, all
operations stop immediately. : Replace
P.C. board.

1. Even if connecting lead wire of
compressor is removed, position­detect circuit error occurred. :
Replace P.C. board.

2. Measure resistance between wires of
compressor, and perform short­circuit. : Replace compressor.

Even if trying operation again, all
operations stop immediately. : Replace
P.C. board.

Check 5-serial LED.

1. Check P.C. board.

1. Check discharge temp. sensor (TD).

2. Check P.C. board.

Not
displayed

Outdoor P.C.
board

Others
(including
compressor)

Outdoor fan drive system
error

Outdoor temp. sensor
error

Compressor drive output
error, Compressor error
(lock, missing, etc.),
Break down

Error exclusive for
multiple type

Compressor does not
rotate. (Current protective
circuit does not operate
when a specified time
passed after compressor
had been activated.)

Discharge temp. ex­ceeded 120°C.

All off

Operation
continues.

All off

All off

All off

All off

Displayed when
error is detected.

——

Displayed when
error is detected.

Displayed when
error is detected.

Displayed when
error is detected.

Displayed when
error is detected.

Position-detect error, over-current
protective operation of outdoor fan drive
system, fan lock, etc. : Replace P.C.
board or fan motor.

1. Check outdoor temp. sensor (TO).

2. Check P.C. board.

Check 5-serial LED.
When 20 seconds passed after start-up,
position-detect circuit error occurred. :
Replace compressor.

Check 5-serial LED.

1. Miswiring of connecting wire of A/B/
C/D rooms in indoor/outdoor units

2. Check gas leakage.

3. Check disconnection of sensor.

4. Electronic control valve error

1. Trouble on compressor

2. Trouble on wiring of compressor
(Missed phase)

1. Check dischage temp. sensor (TD).

2. Degassing

3. Trouble on P.M.V.

Break down of
compressor

All off

– 37 –

Displayed when
error is detected.

1. Check power voltage.
(220–240 V ±10%)

2. Overload operation of refrigeration
cycle
Check installation condition
(Short-circuit of outdoor diffuser).

8-5. Judgement of Trouble by Every Symptom

8-5-1. Indoor unit (Including remote controller)

(1) Power is not turned on (Does not operate entirely)

For 10/13k

Turn off power

supply once, and 5

second later, turn it

on again.

NO

Is OPERATION

lamp blinking?

YES

Is fuse (F01)

of indoor control

board blown?

NO

Is it possible to

turn on power

supply by

pressing

[ ] button

on remote

control?

YES

YES

(R04, C01,

DB01, C50, IC08

IC11 and T01)

are defective.

NO

Parts

transmission

mark on
remote control
flash normally,

and is its signal

transmitted

properly?

Does

YES

NO

Does

fan motor

connector

between 1

3

and

short-circuit?

FILE NO. SVM-06036

Remote control is

defective.

Refer to (5)

"Troubleshooting for

Remote Control.

YES

"

Operation

Check item

Conceivable principle

cause

Measure

Item by symptoms

Unit operates

normally.

Is voltage

(DC 12V or 5V)

NO

Is the

voltage

14~31.4V DC

at C50?

YES

Are DC 5V,

DC 12V

supplied

to main

P.C. board?

YES YES

NO

NO

indicated on
rear of indoor
control board

normal?

Refer to

<Primary check>

or this problem

is one step short

of power P.C.

board block.

Turn off breaker
once and turn it

on again after

removing motor.

YES

Are DC 5V,

or DC 12V

supplied

to main

P.C. board?

NO

NO

Microcomputer

is defective.

Regulator IC
(IC08, IC11)

are defective

Replace main

P.C. board.

Replace motor

• 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.

.

– 38 –

(2) Power is not turned on though Indoor P.C. board is replaced
<Confirmation procedure>

Turn on power supply.

FILE NO. SVM-06036

Does operation lamp flash?

YES YES

NO NO

Is wired correctly to white and black

lead wires of terminal board?

Correct wiring.

To item of

“Power is not turned on”.

– 39 –

(3) Only the indoor fan does not operate.

(For 10/13k)

<Check procedure>

Shut off the

power supply once.

Turn the power supply.

FILE NO. SVM-06036

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 high fan.

Does the fan speed

become higher?

NO

NO

NO

Control P.C. board is defective.

Does AC 120 V

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

Replace the P.C. board.

Does connecting

terminal, connecting

NO NO

NO

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

(IC05, D38) or 12 V

power circuit failure (IC08).

YES

Thermal fuse operated

due to prevent

temperature rising cause

of incompleted connecting.

YES

Normal

−

Is the rotation signal (DC+5 V
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.

0 V)

– 40 –

NO

Replace the P.C. board.

Replace the fan motor.

Replace connecting the

cable (or power cord),

thermal fuse and

terminal block.

FILE NO. SVM-06036

(For 16k)

<Preliminary check>

1 Is it possible to detect the power supply voltage (200 – 240V) between 1 and 2 on the terminal block?
2 Does the indoor fan motor operate in cooling operation?

(In heating operation, the indoor fan motor does not operate for

approximately 5 minutes after it is turned on, to prevent a cold air
from blowing in.)

Turn off power

supply once, and

turn it on again.

Operation

Check item

Conceivable principle

cause

Measure

Item by symptoms

Does

compressor

continue to

operate?

NO

Start to operate

indoor unit in

cooling operation

at airflow

level “LOW”.

Does indoor
fan operate?

YES

Change airflow

level to “High”.

Is it possible to

change airflow

level to “High”?

YES

YES

NO

NO

Is it possible to detect

DC 1V or more between

and 3dof motor

5

e

connector (CN10).

YES

Is it possible to detect DC

310 – 340V between

and 3d of motor

1

e

connector (CN10).

YES

(Motor connection condition)

Is it possible to detect DC 15V

between 4

motor connector (CN10).

Start to operate the
indoor unit. At this time, is it
possible to detect DC 1V or

more between 5e and 3d

of motor connector (CN10)?

Is it possible to rotate cross-

flow fan by hand properly?

and 3d of

e

YES

NO

NO

NO

NO

NO

Turn off indoor unit

and remove connector

from motor. Then press

[ ] button

on remote control to

stop blinking lamp on

indoor unit.

Is it possible to detect

DC 15V between 4

and 3d of motor

connector (CN10).

Turn off indoor unit

and remove connector

from motor.

Then start to operate

indoor unit with
remote control.

e

NO

Replace indoor

fan motor.

Replace main

P.C. board.

Fan motor

operates normally.

Turn off indoor unit and rotate

cross-flow fan by hand when the

unit is on standby. At this time,

is it possible to detect DC 1V or

more between 5e and 3

of motor connector (CN10).

YES

d

NO

– 41 –

Start to operate the indoor

unit in except heating

operation. At this time, is it

possible to detect DC 1V

or more between 5e and

3d of motor connector

(CN10)? (Check this

condition within 15 seconds

after starting unit.)

YES

NO

Replace bearing.

FILE NO. SVM-06036

(4) Indoor fan motor starts rotating by turning on power supply alone. (For 16k)

<Cause>

The IC is built in the indoor fan motor. Therefore the P.C. board is also mounted to the inside of the motor.
If the P.C. board is soldered imperfectly or the IC is defective, the fan motor may automatically rotate by turning

on power supply.

<Confirmation procedure>

(1) Rem
(2) Remove cover of the fan motor lead wires.
(3) Check DC voltage with CN10 connector while the fan rotating.

NOTE :

• Do not disconnect the connector while the fan rotates.

• Use a thin tester rod.

Indoor fan starts rotating when power supply breaker is turned “ON”.

ove the front panel.(Remove 4 screws.)

P.C. board

CN10

(Check output voltage (DC) of the fan motor on P.C. board.)

Measure the voltage of the motor connector

CN10 pin 2 (GND : Black) and pin 5 (V line : Yellow)

under condition that the indoor fan rotates.

Above DC 0.4V

P.C. board is defective.

Below DC 0.4V

Motor is defective.

Yellow

Black

DC

6 (Blue)

5 (Yellow)

4 (Blue)
3 (Yellow)

2 —

1 (Red)

– 42 –

FILE NO. SVM-06036

8-8. How to Check Simply the Main

Parts

8-8-1. How to Check the P.C. Board

(Indoor Unit)

(1) Operating precautions

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

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 procedures

1) When a P.C. board is judged to be defectiv e,
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 :

DC power supply circuit (5V, 12V, 35V),
Indoor fan motor control circuit, CPU and
peripheral circuits, buzzer, and Driving
circuit of top/bottom louvers

b. Indication unit of infrared ray receiving

Infrared ray receiving circuit, LED :

To check defect of the P.C. board, follow the
procedure described below.

– 43 –

(3) Checking procedure.

(For 10/13k)

FILE NO. SVM-06036

Table 8-6-1

No.

1

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.

2

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.

3

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

4

Make the operation status by
pressing once the [

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.

Procedure

] button.

Check Point (Symptom)

1.Is the fuse blown?

Voltage check

1.Between F01 and CN23
(AC 220 ~ 240 V)

2.Between + and − of C50
(DC14 ~ 31V)

3.Between

4.Between 12V and GND

1.All indicators light for 3 sec..

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

1.Compressor does not operate.

2.OPERATION lamp blinks.

5V and GND

Causes

1. Application of shock voltage.
Overload by short-circuit of the
parts.

1. AC power cord is defective.
Poor contact of the terminal plate.

2. Capacitor (C01, C15) is defective .
Line filter (L01) is defective.
Capacitor (C50) is defective.
Diode (DB01) is defective.

3. T01, IC08, IC11 are defective.

Defective indicator, or poor

}

housing assembly. (CN13)

1.The temperature of the indoor

heat exchanger is abnormally
lower.

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

4.Main P.C. board is defective.

5

The status of No. 4 is continued, and
make the following condition.

1.Heat operation

2.Make the setting temperature
higher enough than room
temperature.

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.

1.The temperature of the heat
exchanger is abnormally high.

2.The heat exchanger sensor
connector has short-circuit. (CN01)

3.The heat exchanger sensor is
defective.

4.P.C. board is defective.

1.Poor contact of the motor
connector.

2.Fan motor is defective

– 44 –

(For 16k)

FILE NO. SVM-06036

Table 8-8-1

No.

Shut off the power supply and

1

remove the P.C. board assembly
from the electronic parts base.

Remove the connecting cable from
the terminal block.

Remove the connector for the

2 Voltage check

motor, and turn the power on.
If the OPERATION lamp flashes

(0.5 sec. : ON, 0.5 sec. : OFF) when
the power turning on, the checking
points described as 1-3 of right
column are not necessary to
perform.

Start the operation with the system

3

which the time of the restart delay
timer is shortened.

Procedure

Check point (Symptom)

1.Is the fuse blown?

1.Between TP1 and TP2
(220–240V AC)

2. Between + and - of C03
(310 to 340V DC)

3.

Between 15V and GND

4.

Between 12V and GND

5.

Between 5 V and GND

1.All indicators light for 3 sec.

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

Causes

1.*Application of shock voltage.
Overload by short-circuit of the

*

parts.

1.*AC power cord is defective.
Poor contact of the terminal plate.

*

Miss wiring of the power relay.

*

2.

Capacitor (C01) is defective.

*

Line filter (L01) is defective.

*

Resistor (R05) is defective.

*

Diode (DB01) is defective.

*

3. Q14, IC08, T01 are defective.

4. IC01, D16, T01, F02 are defective.

5. IC01, IC11, T01, F03 are defective.



Defective indicator, or poor



housing assembly. (CN13)



Make the operation status by pressing

4 1.The temperature of the indoor heat

once the [ ] 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.

Turn the power on after connecting

5

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 flashes.

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

2. The motor rotate
much.

s, but it vibrates too

exchanger is abnormally low.

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

3.Heat exchanger sensor, main P.C.
board are defective.

4.Main P.C. board is defective.

1.Poor contact of the motor
connector.

2

. Indoor fan motor is defective.

– 45 –

<Sensor characteristic table>

100

90

FILE NO. SVM-06036

80
70
60
50
40
30

Resistance value (k )

20
10

0

0102030 4050

Temperature (˚C)

TD

TA, TC, TO, TGa, TGb, TGc, TGd

TD : Discharge temp. sensor
TA : Room temp. sensor
TC : Heat exchanger temp. sensor
TO : Outdoor temp. sensor
TGa : Gas side temp. sensor
TGb : Gas side temp. sensor
TGc : Gas side temp. sensor
TGd : Gas side temp. sensor

– 46 –

8-8-3. Indoor Unit (Other Parts)

FILE NO. SVM-06036

No.

1

Room temp. (TA) sensor

Part name

Heat exchanger (TC)
sensor

2

Remote controller

3

Louver motor
MP-24GA

4

Indoor fan motor

Checking procedure

Disconnect the connector and measure the resistance value with tester.
(Normal temp.)

Temperature

Sensor

TA, TC (kΩ)

10°C 20°C 25°C 30°C 40°C

20.7 12.6 10.0 7.9 4.5

To item of How to judge whether remote control is good or bad of the
Judgment of trouble by symptom.

Measure the resistance value of each winding coil by using the tester.
(Under normal temp. 25°C)

Position Resistance value

1

White

Yellow

Yellow
Yellow
Yellow

2
3
4
5

1 to 4
1 to 6
2 to 3
2 to 5

380 ± 10 Ω

Since judgment of motor is difficult on the single motor, refer to 8-5.

– 47 –

2 4-Screws

2

2 2

5

Screws

FILE NO. SVM-06036

9. HOW TO REPLACE THE MAIN PARTS

9-1. Indoor Unit

No. Part name Procedures Remarks

1 Front panel

2 Electrical part

How to remove the front panel

1) Stop 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 4 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 2 connectors (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 and remove the screw
from the LED unit. Then remove the LED
unit and the electrical part box from the
main unit.

3

2 Screws

4 TC Sensor

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 screw 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) Assemble the drain guide (the TC sensor
wire should be covered by the drain guide).

7)

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.

– 48 –

5

Screws

3 Left shaft

3-Connector

2 Center shaft

3

3 2-Screws

FILE NO. SVM-06036

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 2 screws on the heat
exchanger at the 2 fixed plates (upper and
lower) from the back body, and then pull
out the upper side of the 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.

2 Pipe holder

4 2-Screws

2 2-Screws (R)

2 2-Screws (L)

5 mm

6 Base bearing

Notice

To assemb le cross flow fan and fan motor to
the unit, please turn the fan motor unit the
center of its terminal meets the lowest point
of band motor (R) (point A).
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 mm.

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.

3 Set screws

Middle of the fan motor terminal

2 2-Screws

– 49 –

9-2. Microcomputer

FILE NO. SVM-06036

No.



Part name

Common
procedure

Procedure

1) Turn the power supply off to stop the operation of
air-conditioner.

2) Remove the front panel.

• Remove the two fixing screws. (Ø4 x 14

3) Remove the electrical part base.

)

Remarks

Replace the thermal fuse, terminal
block, microcomputer ass’y and the
P.C. board ass’y.

– 50 –

10. EXPLODED VIEWS AND PARTS LIST

10-1. Indoor Unit (E-Parts Assy)

FILE NO. SVM-06036

Location Part Location Part

No. No. No. No.

401 43T 69319 TEMPERATURE SENSOR 406 43T69335 PC BORD (FOR RAS-M16GKCV-E2)
402 43T 60002 TERMINAL BLOCK; 3P 406 43T 69576 PC BORD (FOR RAS-M13GKCV-E2)
403 43T 69320 TEMPERATURE SENSOR 406 43T69577 PC BORD (FOR RAS-M10GKV-E2)
404 43T 62003 CORD CLAMP 406 43T 69578 PC BORD (FOR RAS-M13GKV-E2)
405 43T 69079 PC BOARD ASSY;WRS-LED 406 43T69579 PC BORD (FOR RAS-M10GKCV-E2)
406 43T 69332 PC BORD (FOR RAS-M16GKV-E2)

Description Description

– 51 –

10-2. Indoor Unit

-E2

E

217

216

FILE NO. SVM-06036

217

214

215

210

218

220
206

219

213

208

203

229

228

207

221

211

212

201

205

222

209

227

202

226

204

Electric Parts Assembly

224

230

225

Location Part Location Part

No. No. No. No.

201 43T 00469 FRONT PANEL ASSY 215 43T19302 HOLDER SENSOR

(FOR RAS-M10,M13,M16GKV-E2) 216 43T 49302 PLATE OF EVA SEAL

201 43T 00470 FRONT PANEL ASSY 217 43T49006 HOLDER FOR PLATE

(FOR RAS-M10,M13,M16GKCV-E2) 218 43T22002 ASM-M-BEARING
202 43T09387 INLET GRILLE ASSY 219 43T39301 BASE; BEARING
203 43T 03341 BACK BODY ASSY 220 43T 20322 ASSY-CROSS FLOW FAN
204 43T80311 AIR-FILTER(R) 221 43T39302 BAND MOTOR-L
205 43T80310 AIR FILTER (L) 222 43T21322 MOTOR; FAN (MMF-240-20-4A-1)
206 43T09328 HORIZONTAL LOUVER (FOR RAS-M10,M13GKV-E2 & GKCV
207 43T70310 DRAIN-HOSE 222 43T21384 MOTOR; FAN (ICF-340-30-2)
208 43T 79301 CAP-DRAIN (FOR RAS-M16GKV-E2 & GKCV-E2)
209 43T21372 MOTOR; STEPPING 223 43T39303 BAND MOTOR-R
210 43T 44392 REFRIGERATION CYCLE ASSY 224 43T69422 WIRELESS-REMOCO (WC-H01EE)

(FOR RAS-M10,M13GKV-E2 & GKCV-E2) (FOR RAS-M10,M13,M16GKCV-E2)
210 43T 44393 REFRIGERATION CYCLE ASSY 224 43T69471 WIRELESS-REMOCO (WC-H02EE)

(FOR RAS-M16GKV-E2 & GKCV-E2) (FOR RAS-M10,M13,M16GKV-E2)
211 43T47006 PIPE; DELIVERY 225 43T83003 HOLDER; REMOTE CONTROLLER
212 43T 47005 PIPE; SUCTION 226 43T 62302 TERMINAL COVER

(FOR RAS-M10,M13GKV-E2 & GKCV­212 43T 47016 PIPE; SUCTION 228 43T 07303 HOLDER PIPE

(FOR RAS-M16GKV-E2 & GKCV-E2) 229 43T82310 PLATE; INSTALLATION
213 43T49009 SPRING 230 43T60359 CORD-FM
214 43T 11301 PIPE SHIELD

Description Description

227 43T60317 CORD MOTOR LOUVER

223

– 52 –

TOSHIBA CARRIER (THAILAND) CO.,LTD.

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

AMPHUR MUANG, PATHUMTHANI 12000, THAILAND.