Toshiba RAS-10SA-ES, RAS-10SKHP-ES, RAS-10S2AH-ES, RAS-10SKP-ES SERVICE MANUAL

SERVICE MANUAL

AIR CONDITIONER

SPLIT WALL TYPE

RAS-10SKHP-ES / RAS-10S2AH-ES

RAS-10SKP-ES / RAS-10SA-ES

FILE NO. SVM-09029

January, 2009

CONTENTS

1. SPECIFICATIONS

2. CONSTRUCTION VIEWS

2-1 Indoor Unit

2-2 Outdoor Unit

3. WIRING DIAGRAM

3-1 RAS-10SKHP-ES / RAS-10S2AH-ES

3-2 RAS-10SKP-ES / RAS-10SA-ES

4. SPECIFICATION OF ELECTRICAL PARTS

4-1 Indoor Unit (RAS-10SKHP-ES)
4-2 Outdoor Unit (RAS-10S2AH-ES)
4-3 Indoor Unit (RAS-10SKP-ES)

4-4 Outdoor Unit (RAS-10SA-ES)

5. REFRIGERATION CYCLE DIAGRAM

5-1 RAS-10SKHP-ES / RAS-10S2AH-ES
5-2 RAS-10SKP-ES / RAS-10SA-ES

FILE NO. SVM-09029

6. CONTROL BLOCK DIAGRAM

6-1 RAS-10SKHP-ES / RAS-10S2AH-ES
6-2 RAS-10SKP-ES / RAS-10SA-ES

7. OPERATION DESCRIPTION

7-1 Remote control
7-2 Outline of Air Conditioner Control
7-3 Description of Operation Mode
7-4 High-Temperature Limit Control
7-5 Low-Temperature Limit Control
7-6 Defrost Operation
7-7 Current Limit Control
7-8 One-Touch Comfort
7-9 Hi POWER Mode
7-10 QUIET Mode
7-11 ECO Operation

7-12 COMFORT SLEEP mode
7-13 FILTER Check lamp
7-14 Auto Restart Function

7-15 Self-Cleaning function

- 1 -

8. INSTALLATION PROCEDURE

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

9. TROUBLESHOOTING CHART

9-1 Troubleshooting Procedure
9-2 Basic Check Items
9-3 Primary Judgement
9-4 Self-Diagnosis by Remote Control (Check Code)
9-5 Troubleshooting Flowcharts

9-6 Troubleshooting for Remote Control

FILE NO. SVM-09029

10. PART REPLACEMENT

10-1 Indoor Unit
10-2 Outdoor Unit

11. EXPLODED VIEWS AND PARTS LIST

11-1 Indoor Unit (E-Parts Assy)
11-2 Indoor Unit

11-3 Outdoor Unit (RAS-10S2AH-ES)
11-4 Outdoor Unit (RAS-10SA-ES)

- 2 -

1. SPECIFICATIONS

FILE NO. SVM-09029

MODEL

ITEM Cooling Heating Cooling

Capacity

Power source V 220 − 240

Power consumption kW 0.83 0.85 0.79 0.82 0.83 0.85

Power factor % 98 97 97 96 98 97

Running Indoor A 0.15
current Outdoor A 3.71 3.50 3.55 3.40 3.71 3.50

Starting current A 18

Moisture removal lit/h 1.2

Noise

Refrigerant

Refrigerant control Capillary tube

Interconnection

pipe

Indoor (H/M+/M/L+/L)

Outdoor (220-240V) dB 47 49 47 49 46 47

Name of refrigerant R410A
Rated amount kg 0.78

Gas side size mm ∅ 9.52

Connection type Flare connection

Liquid side size mm ∅ 6.35

Connection type Flare connection

Maximum length
(One way)

Maximum height
difference

kW 2.73 2.73 2.92 2.96 2.73 2.73

Phase 1∅ 

Hz 50

dB

m 10*

m 5

RAS-10SKHP-ES / RAS-10S2AH-ES

220V 240V 220V 240V 220V 240V

39/37/35/33/31

1

RAS-10SKP-ES / RAS-10SA-ES

0.72

INDOOR UNIT

Height mm 250

Dimensions Width mm 740

Depth mm 195

Net weight kg 8

Evaporator type Finned tube

Indoor fan type Cross flow fan

High fan m3/h 540 560 540

Air volume Medium fan m3/h 460 500 460

Low fan m3/h 390 400 390

Fan motor output W 20

Air filter Honeycomb woven filter with PP frame

OUTDOOR UNIT RAS-10S2AH-ES RAS-10SA-ES

Height mm 550

Dimensions Width mm 780

Depth mm 290

Net weight kg 31 30

Condenser type Finned tube

Outdoor fan type Propeller fan

Airflow volume m3/h 2030 2150 2030 2150 1740 1850

Fan motor output W 30 20

Compressor

Safety device Fuse, Overload relay

Louver type Automatic louver
Usable outdoor temperature range °C 15 ~ 43 −10 ~ 24 15 ~ 43

Model PA108X1C-4FZDN

Output W 750

RAS-10SKP-ESRAS-10SKHP-ES

− 3 −

Note : 1

·

Capacity is based on the following temperature conditions.

FILE NO. SVM-09029

Temperature

Indoor unit inlet air temperature

Outdoor unit inlet air temperature

Note : 2

*1 No need to change extra refigerant.

Condition

Cooling Heating

(DB) 27°C20°C

(WB) 19°C15°C

(DB) 35°C7°C

(WB) 24°C6°C

JIS C9612

- 4 -

2-1. Indoor Unit

FILE NO. SVM-09029

2. CONSTRUCTION VIEWS

Front panel

60

8

Knock out system

252

50

Air inlet

Air filter

739

Air outlet

Heat exchanger

195

58

52

8

Knock out system

50

6055

5560

133.41499104.39

56

Wireless remote controller

157

19

125

Drain hose (0.5m)

290

Hanger

606

235

215

235

215

Hanger

45.9

250

90 135

Hanger

145

145

Hanger

Installation plate outline

Center line

Remote controller holder

Connecting pipe (0.37m)
(Flare ∅

6.35)

Connecting pipe (0.37m)
(Flare ∅

9.52)

For stud bold (

∅

For stud bold (∅

26.6

45.9164.1

40

38

90135

63

8~

10)

∅

26

6)

– 5 –

2.2. Outdoor Unit

600

50

36

320

306

A detail Drawing (Back leg)

R5.5

R

Ø

15

6 hole

28

86

320

Ø

25 Drain outlet

FAN-GUARD

436

Ø

FILE NO. SVM-09029

A

108 125

306

320

Ø

2

-

Ø

11 x 14

(For 8 -

Ø

Hole

10 anchor bolt)

Ø

6 hole

11x14 hole

Ø

B Detail Drawing (Front leg)

36
50

R

15

COVER-PV

Z

290

550

45 or more

275

320
342

Electrical part cover

Liquid side
(Flare 6.35)

Ø

Gas side
(Flare 9.52)

Ø

5

4

S

ervice port

-Ø 10 anchor bolt)

Ø

Z View

600

Air intlel

9060090

69

129

84

2

-R5- 5x17L UShape (For 8

320

100 or more

Air outlel

400 or more

Installation dimension

− 6 −

600 or more

2- 11x14 Long holes(For 8 - 10 anchor bolt)

Ø

Ø

Ø

3. WIRING DIAGRAM

3-1. RAS-10SKHP-ES / RAS-10S2AH-ES

FILE NO. SVM-09029

BRW

L

BLU

N

GRN & YEL

SINGLE PHASE
220-240V 50/60Hz

BLK

WHI

BLK
P04

CN31

T02

C.T.

1 1

3 3

CN27

CN03

1
1

BLK

2
2

BLK

SENSOR (TA)

SG01

DSA

BLK

THERMO

PINK

1
1

R22

VARISTOR

3

4

RY03

73 C x2

THERMAL FUSE

PINK

2

CN04

2

T6.3A 250VAC

RY01

CN01

2

1

HEAT EXCHANGER

2

1

BLK

BLK

SENSOR (TC)

RY04

CR02

CR01

LOUVER
MOTOR

YEL

5
5

R

1

STO

C01

R2

VARI

MAIN P.C. BOARD
WP-015

INFRARED RAYS RECEIVE

AND INDICATION PARTS

CN25

BLU

WHI

YEL

YEL

YEL

34

2

1

34

2

1

CN07

DC5V

Voltage
Regulator

C02

L01

145 C

1 1
2 2
3 3

4 4

5 5

AC FAN MOTOR

BLU

IC35

CN10

66

321
321

BLU

321
321

C15

BLK
GRY
YEL

BRW

RED

WHI

54 8
54 8

BLU

BLU

54 8
54 8

R319

5
5

6

7

6

7

WHI

BLU

BLU

6

7

CN14

6

7

Micro
Power
Module

DC12V

+

C63

DB01

3
3

CN11

21 3

1

21 3

1

INDOOR
TERMINAL
BLOCK

OUTDOOR
TERMINAL
BLOCK

OVER LOAD RELAY

COMPRESSOR

BLK

BLK

PNK

WHI

BLK

1

(L)2(N)

1

RED

WHI

2

BLU

SOLENOID COIL

RED

RED

CAPACITOR

RED

3

3

BLU

CAPACITOR

FAN
MOTOR

BLU

4

4

WHI BLK

− 7 −

INDOOR

OUTDOOR

CHASSIS

3-2. RAS-10SKP-ES / RAS-10SA-ES

FILE NO. SVM-09029

POWERSUPPLY
(Frommainline)
1∅220‑240V

50Hz



Heatexchanger
Sensor(TC)

Thermosensor(TA)

CN25

1
2
3
4
5
6
7
8

andindicationparts.

Infraredraysreceiver

WP‑017

GRN&YEL

Heatexchanger

BLU

1

BLU

2

BLU

3

BLU

4

BLU

5

BLU

6

BLU

7

WHI

8

CN01

1

22

CN03

1
2

CN12

1
2

3
4
5
6
7
8

BRW

L

BLU

N

GRN&YEL

1

6.3A

1
2

1
2
3
4

5
6
7
8

250VAC

R62

WHI

BLK

CN31

4

RY01

F01

R63

21

C25

3

BLK
P04

3

SG01

DSA

C26

L01

4

DB01

R64

C27

Switchingpowersupply

DC5V

Voltageregulator

12V

3

4

MCU

IC03

WP‑018

1

2

CN04

11
22

DC12V

PNK

PNK

CN07

WHI

1

1

YEL

22

YEL

3

3

YEL

44

YEL

55

CN11

YEL

1

1

GRY

2

2

BRW

3

3

C07

CN10

WHI

5

5

BLK

33

RED

1

1

o

Tempfuse73Cx2

1
22
3
44
55

1

3

Louvermotor

1

1

2

2

3

3

ACmotor

4

4

565

6

Fanmotor

INDOOR

TERMINAL

BLOCK

1

BLK

OUTDOOR

TERMINAL

BLOCK

1(L)

BLK

BLK

FAN MOTOR

OVERLOAD RELAY

RED

2

WHI

2(N)

COMPRESSOR

RED
WHI

GRN&YEL

CHASSIS

RED

CAPACITOR

INDOOR

OUTDOOR

CAPACITOR

RED
WHI

− 8 −

FILE NO. SVM-09029

4. SPECIFICATION OF ELECTRICAL PARTS

4-1. Indoor Unit (RAS-10SKHP-ES)

No. Parts name Type Specifications

1 Fan motor (for indoor) AFN-220-20-4D AC Motor with 145 °C thermo fuse
2 Thermo sensor (TA-sensor) 10k at 25 C
3 Micro power module (M01) RM1260V
4 Microcontroller unit (IC30) TMP87CM40AFG-6P69
5 Heat exchanger sensor

(TC-sensor)
6 Line filter (L01)
7 Bridge rectifier (DB01) DB105G 1A, 600 V

8 Capacitor (C63) EKMH401VSN470MP20S 47mmF, 400 V

9 Fuse (F01) BET6.3A 6.3A, 250VAC

10 Varistor (R21, R22)
11 Resistor (R319) RF-2TK5R6 5.6 , 2 W
12 Louver motor
13 Relay (Comp., RY01) G4A-1A-E-CA Rating 20A/AC250 V, 12VDC
14 Relay (Fan, RY03)
15 Relay (Solenoide, RY04) G5NB-1A Rating 3A/AC250 V, 12VDC

LC*SS11V-R06270

SR561K14DL

MP24ZCT

G5NB-CA

W

W

10k at 25 C

27mH, 600mA

560 V

W

12VDC

Rating 3A/AC250 V, 12VDC

°

°

4-2. Outdoor Unit (RAS-10S2AH-ES)

No. Parts name Type Specifications

Output (Rated) 750W , 2poles, 1 phase, 220 − 240V, 50Hz

1 Compressor PA108X1C-4FZDN Winding resistance (Ω) C-R C-S

(at 20°C) 3.75 4.75

Output (Rated) 30W, 6poles, 1 phase, 220 − 240V, 50Hz

2 Fan motor (for outdoor) Winding resistance (Ω) Red-Black White-Black

Running capacitor

3

(for fan motor)

Running capacitor

4

(for compressor)

Solenoid coil

5

(for 4-way valve)

6

Overload relay

WLF-240-30A

(at 20°C)

DS451155NPQB AC 450V~, 1.5µ

RS44B256U0213S

−

LPAP960B

AC 440V~, 25

AC 220 − 240V

U/T: 6.1A(80°C), Open: 135±5°C, Close: 78±11°C

µF

237

F

380

- 9 -

FILE NO. SVM-09029

4-3. Indoor Unit (RAS-10SKP-ES)

No. Parts name Type Specifications

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

(TC-sensor)
6 Line filter (L01) LC*SS11V-R06270 27mH, 600mA

7 Capacitor (C27) EKMH401VSN470MP20S 47mF, 400 V
8 Fuse (F01) BET6.3A 6.3A, 250VAC

9 Varistor (R62, R63) SR561K14DL

10 Resistor (R64)
11 Louver motor MP24ZCT 12VDC
12 Relay (Comp., RY01) G4A-1A-E-CA Rating 20A/AC250 V, 12VDC

ST-02

RF-2TK5R6

W

W

10k at 25 C

560 V

W

5.6 , 2 W

°

°

4-4. Outdoor Unit (RAS-10SA-ES)

No. Parts name Type Specifications

Output (Rated) 750W, 2poles, 1 phase, 220 − 240V, 50Hz

1 Compressor PA108X1C-4FZDN Winding resistance (Ω) C-R C-S

(at 20°C) 3.75 4.75

Output (Rated) 20W, 6poles, 1 phase, 220 − 240V, 50Hz

2 Fan motor (for outdoor) Winding resistance (Ω) Red-Black White-Black

Running capacitor

3

(for fan motor)

Running capacitor

4

(for compressor)

5

Overload relay

SKF-240-20B

(at 20°C)

DS451155NPQB

B32332I5256J063

LPAP960B

AC 450V~,1.5 µF

AC 450V~,25

U/T: 6.1A(80°C), Open: 135±5°C, Close: 78±11°C

235.2 260.1

µF

− 10 −

5. REFRIGERATION CYCLE DIAGRAM

5-1. RAS-10SKHP-ES / RAS-10S2AH-ES

FILE NO. SVM-09029

Indoor unit

Cooling

0.39m
(Connecting pipe)
∅9.52

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

Cooling

Heating

Heating

P

Packed valve

(∅9.52)

Heating

4-way valve

Cooling

Compressor

PA108X1C-4FZDN

Accumulator

Heat exchanger

Cross flow fan

T1

Capillary tube

∅1.5x1000

Packed valve

(∅6.35)

Capillary tube

∅1.5x1200

l

0.49m
(Connecting pipe)
∅6.35

l

Heat exchanger

Refrigerant
R410A : 0.78 kg.

Cooling
Heating

Propeller fan
Outdoor unit

Mark( )means check points of Gas Leak.

Ambient temp.

50Hz

Standar d

pressure

(MPaG)

P

Surface temp. of heat

exchanger inter changing

pipe

T1

(°C)

Fan speed

(indoor)

conditions DB/WB

(°C)

Indoor Outdoor

Standard 2.95 43.5 High 20/15 7/6

Heating Overload 3.70 57.0 Low 27/− 24/18

Low temperature 2.40 32.0 High 20/−

−10/−10

Standard 0.93 10.5 High 27/19 35/24

Cooling Overload 1.08 15.0 High 32/23 43/26

Low temperature 0.69 2.0 Low 21/15 21/15

Note :

•

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

− 11 −

5-2. RAS-10SKP-ES / RAS-10SA-ES

FILE NO. SVM-09029

Indoor unit

Cooling

0.39m
(Connecting pipe)
∅9.52

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

Cooling

Packed valve

Cooling

P

(∅9.52)

Compressor

PA108X1C-4FZDN

Heat exchanger

Cross flow fan

T1

0.49m
(Connecting pipe)
∅6.35

Packed valve

(∅6.35)

Capillary tube

∅1.5x1100l

Heat exchanger

Refrigerant
R410A : 0.72 kg.

Cooling

Propeller fan
Outdoor unit

Mark( )means check points of Gas Leak.

Ambient temp.

50Hz

Standard

pressure

(MPaG)

P

Surface temp. of heat

exchanger interchanging

pipe

T1

(°C)

Fan speed

(indoor)

conditions DB/WB

(°C)

Indoor Outdoor

Standard 0.95 10.5 High 27/19 35/24

Cooling Overload 1.12 16.0 High 32/23 43/26

Low temperature 0.71 2.0 Low 21/15 21/15

Note :

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

− 12 −

6. CONTROL BLOCK DIAGRAM

6-1. RAS-10SKHP-ES / RAS-10S2AH-ES

FILE NO. SVM-09029

Heat Exchange sensor

Thermo. Sensor

Current Sensor

(Compressor Current)

Infrared Rays Signal Reciver

Main Unit Control Panel

Functions

• Louver Control

•3-minutes Delay at Restart

for Compressor

Initiallizing Circuit

Clock Frequency
Oscillator Circuit

Power Supply

Circuit

Noise Filter Relay Driver, Louver Driver

•Motor Revolution Control

•Processing

(Temperature Processing)

•Timer

Compressor

ON/OFF

Signal

Outdoor Fan

M.C.U.

ON/OFF

Signal

4-Way Valve

ON/OFF

Signal

Operation

Display

Timer

Display

Indoor Fan

Motor

Louver

ON/OFF

Signal

Louver

Motor

220-240 V~, 50Hz

REMOTE CONTROL

Relay

RY01

Compressor 4-Way Valve

Remote Control

Operation ( )

Operation Mode Selection

AUTO, COOL, DRY, HEAT, FAN ONLY

Temperature Setting

Fan Speed Selection

ON TIMER Setting

OFF TIMER Setting

Louver Auto Swing

Louver Direction Setting

ECO

Relay

Outdoor Fan Motor

RY03

Infrared Rays

Relay

RY04

Hi power

Filter Reset

− 13 −

6-2. RAS-10SKP-ES / RAS-10SA-ES

Main Unit Control Panel M.C.U.

Heat Exchange sensor

Functions

FILE NO. SVM-09029

Operation

Display

Thermo. Sensor

Infrared Rays Signal Reciver

• Louver Control

•3-minutes Delay at Restart

for Compressor

Initiallizing Circuit

Clock Frequency
Oscillator Circuit

Power Supply

Circuit

Noise Filter Relay Driver, Louver Driver

•Motor Revolution Control

•Processing

(Temperature Processing)

•Timer

Compressor

ON/OFF

Signal

Relay

RY01

Timer

Display

Indoor Fan

Motor

Louver

ON/OFF

Signal

Louver

Motor

220-240 V~, 50Hz

REMOTE CONTROL

Compressor, Outdoor Fan Motor

Infrared Rays

Remote Control

Operation ( )

Operation Mode Selection

AUTO, COOL, DRY, FAN ONLY

Temperature Setting

Fan Speed Selection

ON TIMER Setting

OFF TIMER Setting

Louver Auto Swing

Louver Direction Setting

ECO

Hi power

Filter Reset

- 14 -

7. OPERATION DESCRIPTION

FILE NO. SVM-09029

7-1. Remote control

7-1-1. Function of Push Putton

11 Infrared signal emitter

1

11

2

Start/Stop button

3

Mode select button (MODE)

4

Temperature button (TEMP)

5

Fan speed button (FAN)

6

Swing louver button (SWING)

7

Set louver button (FIX)

8

On timer button (ON)
Off timer button (OFF)

9

18

10

Sleep timer button (SLEEP)

19

Timer setup button (SET)

11
12

20

Timer clear button (CLR)

13

Memory and Preset button (PRESET)

14

One Touch button (ONE-TOUCH)

15

High power button (Hi-POWER)

16

Economy button (ECO)

17

Quiet button (QUIET)

18

Comfort sleep button (COMFORT SLEEP)

19

Filter reset button (FILTER)

Clock Reset button (CLOCK)

20
21

Check button (CHK)

13

14

17

10
21

19

1

TOSHIBA

PRESET

ONE-TOUCH

2

QUIET

SWING

FIX Hi-POWER ECO

6
7

8

TIMER

SLEEP

CHK

ON

FILTER

TEMP

OFF

COMFORT

CLOCK

FAN

MODE

SLEEP

5

4

3

18

15
16

CLR

12

9

SET

11

20

− 15 −

FILE NO. SVM-09029

7-1-2. Display of Remote Control

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

1. Transmission mark

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

indicates when the

2. Mode indicator

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

: Cool, : Dry, : Heat, : Fan only)

3. Temperature indicator

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

4. FAN speed indicator

Indicates the selected fan speed.
AUTO or five fan speed levels

(

LOW , LOW+ , MED , MED+ ,
HIGH ) can be shown.
Indicates AUTO when the operating mode is

either AUTO or

: Dry.

5. TIMER and clock time indicator

The time setting for timer operation or the clock
time is indicated.

The current time is always indicated except
during TIMER operation.

6. Hi-POWER indicator

Indicates when the Hi-POWER operation starts.
Press the Hi-POWER button to start and press it

again to stop the operation.

7. (PRESET) indicator

Flashes for 3 seconds when the PRESET button is
pressed during operation.

The
button for more than 3 seconds while the mark is

flashing.
Press another button to turn off the mark.

mark is shown when holding down the

8. ECO indicator

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

to stop operation.

9. A, B change indicator remote controller

When the remote controller switching function is
set, “B” appears in the remote controller display.
(When the remote controller setting is “A”, there is
no indication at this position.)

11

10

10. Comfort sleep

Indicates when comfort sleep is activaled.
Press comfort sleep bu

9

15

1

2

13

11. Quiet

Indicates when quiet is activated.
Press quiet button to start and press it again to stop
operation.

tton to selectter

12. One-Touch

Indicates when one touch comfort is activated.
Press one-touch button to start the operation.

13. Swing

Indicates when louver is swing.
Press swing button to start the swing operation
and press it again to stop the swing operation.

8

6

3

7

4

5

− 16 −

FILE NO. SVM-09029

7-2. Outline of Air Conditioner Control

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

and the compressor.

(1) Role of indoor unit controller

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

• Temperature measurement at the air inlet of the

indoor heat exchanger by the indoor

temperature sensor

• Temperature measurement of the indoor heat

exchanger by the heat exchanger sensor

• Louver motor control

• Indoor fan motor operation control

• LED display control

• Transferring of operation commands to the

outdoor unit

• Receiving of information of the operation status

and judging of the information or indication of
error

(2) Role of outdoor unit controller

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

• Compressor operation

control

• Operation control of

outdoor fan motor

Operations according

to the commands
from the indoor unit

• Turning off the compressor and outdoor fan

when the outdoor unit receives the shutdown
command

• Defrost control in heating operation

(Temperature measurement by the indoor heat
exchanger and control for the four-way valve
and the outdoor fan motor) *Heat pump Model
only

7-2-1. Louver control

(1) Vertical air flow louver

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

(2) Swing

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

7-2-2. Indoor Fan Control

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

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

Fig 7-2-2

Fig (7-2-1) Cooling Fig (7-2-2) Heating

Indication

L
L+

M
M+

H

Fan speed

Low

(L + M) / 2

Med

(M + H) / 2

High

Indication

L
L+

M
M+

H

Fan speed

(L + M) / 2

(M + H) / 2

Low

Med

High

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

OPERATION

MODE

RAS-10SKHP-ES

Model

RAS-10SKP-ES

Cool UH H M+ M L+ L L- UL SUL
Heat UH H M+ M+ L+ L L- UL SUL
Dry UH H M+ M L+ L L- UL SUL
fan speed (rpm) 1350 1350 1350 1300 1250 1180 1140 1000 980 980 900 800 750 700 550
Air flow (m3/h) 560 560 560 540 510 500 460 400 390 390 350 300 270 250 180
fan speed (rpm) 1350 1350 1350 1300 1250 1180 1140 1000 980 980 900 800 750 700 550
Air flow (m3/h) 560 560 560 540 510 500 460 400 390 390 350 300 270 250 180

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

FAN TAP

− 17 −

FILE NO. SVM-09029

7-3. Description of Operation Mode

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

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

(2) When pressing [ ] button on the

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

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

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

7-3-1. Fan only operation

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

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

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

°C

7-3-2. Cooling operation

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

(1) The compressor, 4-way valve, outdoor fan and

operation display lamp are controlled as shown in
Fig. 7-3-4.

° C



ON ON

OFF OFF OFF ON

4-way valve

Compressor

Outdoor fan

(Room temp.) (Preset temp.)

Preset
temp.

0.5

0

Fig. 7-3-4

display lamp

OPERATION

(Room temp.) − (Preset temp.)

Preset
temp.

+3
+2.5
+2

+1.5
+1
+0.5
0

(Preset temp.: 24 °C)

M+

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

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

(Linear approximation
from M+ and L)

NOTE2 : The Hi Power, ECO and COMFORT SLEEP

operation can not be set

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

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

motor operates as shown in Fig. 7-3-5. When

*1
*2
*3

[FAN] button is set to LOW, LOW+, MED, MED+ or
HIGH, the motor operates with a constant air flow.

°C

(Room temp.) − (Preset temp.)

Preset
temp.

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

0

-0.5

M+

*1
*2
*3

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

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

(Linear approximation
from M+ and L)

Fig. 7-3-5 Setting of air flow [FAN:AUTO]

− 18 −

FILE NO. SVM-09029

7-3-3. Dry operation

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

(1) The compressor, 4-way valve, outdoor fan and

operation display lamp are controlled as shown in
Fig. 7-3-6.

° C

ON:6min.

OFF:4min.

ON

ON:5min.

OFF:5min.

OFF

4-way valve

Outdoor fan

(Room temp.) (Preset temp.)

Preset
temp.

+3

+2

+1

ON:6min.

OFF:4min.

OFF

ON:5min.

OFF:5min.

OFF

0

Compressor

Fig. 7-3-6

7-3-4. Heating operation

RAS-10SKHP-ES

(1) The compressor, 4-way valve, outdoor fan and

Preset
temp.

display lamp

OPERATION

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

operation display lamp are controlled as shown in
Fig. 7-3-8.

° C

0

0.5

(Room temp.) (Preset temp.)

ON

OFF

ON

Compressor

ON

OFF

ON

4-way valve

Outdoor fan

OPERATION

display lamp

(2) The microprocessor turns the compressor on and

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

Room temp.

Preset temp.+1

Preset temp.

Compressor

Outdoor fan

Indoor fan

ON ON ON ON

OFF OFF OFF

L. *S.L. S.L.L. L. S.L. L.

*Super Low

Fig. 7-3-7

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

only.

Fig. 7-3-8

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

motor operates as shown in Fig. 7-3-9. When
[FAN] button is set to LOW, LOW+, MED, MED+ or
HIGH, the motor operates with a constant air flow.

Preset
temp.

°C

0

-0.5

-1

-1.5

-2

-5.0

-5.5

[FAN AUTO]

(Room temp.) − (Preset temp.)

L

*1
*2

+

M

H

*1 : Fan speed = (M + − L) x 1/4 + L

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

(Calculated with inear approximation from M+ and L+)

(4) The ECO and Hi Power operations can not be set.

Fig. 7-3-9

− 19 −

y.

c

e

U

.

c

U

g

y

FILE NO. SVM-09029

(3) The indoor heat exchanger restricts revolving

speed of the fan motor to prevent a cold draft. The
upper limit of the revolving speed is shown in
Fig. 7-3-10 and Table 7-3-2.

T

46

34

45 33

33 21
32 20

*A+4 *A+4
*A-4 *A-4

Fan speed MAN
Fan speed AUTO in stabilit

* No limitation while fan speed MANUAL mode is in stabilit
* A: When Tsc 24, A is 24, and when Tsc < 24, A is Ts

Tsc: Set valu

H

Line-approximate
H and S

SUL

L with Tc

Stop

AL in startin

Fig. 7-3-10 Cold draft preventing control

Table 7-3-2

Fan *5 *6
speed Starting period Stabilized period

AUTO • Up until 12 minutes

passed after starting
the unit

• From 12 to 25 minutes
passed after starting
the unit and room
temperature is 3°C
lower than preset
temperature

Manual • Room temperature
(L – H) < Preset temperature

• From 12 to 25 minutes
passed after starting
the unit and room
temperature is
between preset
temperature and 3°C
lower than preset
temperature

• 25 minutes or more
passed after starting
the unit

• Room temperature

Preset temperature

–4°C

–3.5°C

7-3-5. Automatic operation

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

(1) One of 3 operations (Cooling, Fan only or Heating)

is selected according to difference between the
preset temperature and the room temperature at
which the automatic operation has started, as
shown in Fig. 7-3-11. The Fan only operation
continues until the room temperature reaches a
level at which another mode is selected.

(2) Temporary Auto

When the RESET button on the indoor unit
is pushed, the preset temperature is fixed at 24°C
and the indoor unit is controlled as shown in
Fig. 7-3-11.

RAS-10SKHP-ES

°C

Cooling operation

0

Fan only operation

-1

Heating operation

(Room temp.) − (Preset temp.)

RAS-10SKP-ES

°C

Cooling operation

0

Heating operation

(Room temp.) − (Preset temp.)

Fig. 7-3-11

− 20 −

FILE NO. SVM-09029

7-4. High-Temperature Limit Control

The microcontroller detects the indoor heat exchanger
temperature to prevent pressure of a refrigerating cycle
from increasing excessively.
The compressor and outdoor fan motor are controlled
as shown in Fig. 7-4-1.

Compressor

OFF

ON

ON

Outdoor fan

OFF

OFF

ON

Heat exchanger
temp.

(°C)
60

53
52

Fig. 7-4-1

7-5. Low-Temperature Limit Control

The microcontroller detects the indoor heat exchanger
temperature to prevent the indoor heat exchanger from
freezing.
The compressor and outdoor fan motor are controlled
as shown in Fig. 7-5-1 and 7-5-2.

7-6. Defrost Operation

*Heat pump model only*Heat pump model only

During the heating operation, the outdoor heat
exchanger temperature goes down and sometimes it is
frozen.
In this case, the air conditioner stops the heating
operation and starts the defrost operation to melt ice.

7-6-1. Condition to start the defrost operation

The defrost operation starts whichever below
conditions are satisfied.

(1) When the cumulative compressor operating time is

longer than 40 or 90 minutes and difference
between the indoor heat exchanger temperature
and the room temperature is less than the
specified value. (This value is decided by the
microprocessor.) (Control example is shown in
Fig. 7-6-1. In case of B or C, the defrost operation
starts.)

(2) When the current limit control or the high

temperature limit control is performed for total of
90 minutes.

RAS-10SKHP-ES
RAS-10SKP-ES

Heat exchanger
temperature

(°C)

5

2

Compressor Outdoor fan

Fig. 7-5-1

ON

Less than 2°C continues

for 5 minutes

OFF

D

xchanger temp

A

Indoor heat e

- Room temp

Fig. 7-6-1 (Indoor fan speed : M)

7-6-2. Defrost operation time control

<In case of B>

(1) The heating operation is performed for at least

40 minutes.

(2) The maximum defrost operating time is 6 minutes.

The defrost operating time for the 4th cycle is
10 minutes. (When the outdoor temperature is
very low, however, the defrost operating time is
10 minutes.)

B

C

Cumulative
compressor
operating time

− 21 −