Toshiba RAS-18GKHP-ES2, RAS-18GAH-ES2, RAS-18GA-ES2, RAS-24GKHP-ES2, RAS-24GKP-ES2 SERVICE MANUAL

SERVICE MANUAL

AIR CONDITIONER

SPLIT WALL TYPE

RAS-24GKHP-ES2 / RAS-24GAH-ES2

RAS-18GKHP-ES2 / RAS-18GAH-ES2

FILE NO. SVM-06020

RAS-24GKP-ES2 / RAS-24GA-ES2
RAS-18GKP-ES2 / RAS-18GA-ES2

24 Class18 Class

May, 2006

CONTENTS

1. SPECIFICATIONS

2.

CONSTR

2-1
2-2
2-3

3. WIRING DIAGRAM

3-1
3-2
3-3

3-3

4. SPECIFICATION OF ELECTRICAL PARTS

4-1 Indoor Unit (RAS-24GKHP-ES2, RAS-18GKHP-ES2)
4-2 Outdoor Unit (RAS-24GAH-ES2)
4-3 Outdoor Unit (RAS-18GAH-ES2)

4-4 Indoor Unit (RAS-24GKP-ES2, RAS-18GKP-ES2)

4-5 Outdoor Unit (RAS-24GA-ES2)
4-5 Outdoor Unit (RAS-18GA-ES2)

UCTION VIEWS

Indoor Unit
Outdoor Unit
Outdoor Unit

RAS-24GKHP-ES2 / RAS-24GAH-ES2
RAS-18GKHP-ES2 / RAS-18GAH-ES2

RAS-24GKP-ES2 / RAS-24GA-ES2
RAS-18GKP-ES2 / RAS-18GA-ES2

(24 Class)
(18 Class)

FILE NO. SVM-06020

5. REFRIGERATION CYCLE DIAGRAM

5-1

RAS-24GKHP-ES2 / RAS-24GAH-ES2
RAS-18GKHP-ES2 / RAS-18GAH-ES2

5-2

5-3 RAS-24GKP-ES2 / RAS-24GA-ES2
5-4

RAS-18GKP-ES2 / RAS-18GA-ES2

RAS-B18NKPX / RAS-18N2AX

5-4

6. CONTROL BLOCK DIAGRAM

6-1 RAS-24GKHP-ES2, RAS-18GKHP-ES2
6-2 RAS-24GKP-ES2, RAS-18GKP-ES2

7.

OPERA

7-1
7-2 Description of Operation Circuit
7-3 Hi POWER Mode
7-4 High-Temperature Limit Control
7-5 Low-Temperature Limit Control
7-6 Defrosting Operation
7-7 A
7-8
7-9 Self-Cleaning function
7-10 QUIET Mode
7-11 COMFORT SLEEP mode

TION DESCRIPTION

Outline of Air Conditioner Control

uto Restar t Function

Filter Check Lamp

- 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 How to Diagnose Faulty Part
9-6 Troubleshooting for Indoor Unit
9-7 Troubleshooting for Wiring (Interconnect cable and Serial Signal
9-8 Troubleshooting for P.C. Board
9-9 Troubleshooting for Remote Control

FILE NO. SVM-06020

Wire)

10. PARTS REPLACEMENT

10-1 Indoor Unit
10-2 Outdoor Unit (RAS-24GAH-ES2, RAS-24GA-ES2)
10-3 Outdoor Unit (RAS-18GAH-ES2, RAS-18GA-ES2)

11. EXPLODED VIEWS AND PARTS LIST

11-1 Indoor Unit (E - Parts Assy)
11-2 Indoor Unit
11-3 Outdoor Unit
11-4 Outdoor Unit (RAS-18GAH-ES2)
11-5 Outdoor Unit (RAS-24GA-ES2)
11-6 Outdoor Unit (RAS-18GA-ES2)

(RAS-24GAH-ES2)

• This air conditioner is charged with
HFC (R410A) that doesn't deplete the
Ozone layer.

• This air conditioner requires special
installation for the refrigerant R410A.

- 2 -

1. SPECIFICATIONS

FILE NO. SVM-06020

MODEL

ITEM

Capacity

Phase 1∅

Power source V 220 - 240

Power consumption W 2430 2510 2400 2480 2560 2690 1850 1900 1678 1748 1860 1960
Power factor % 98 85 99 88 99 92 98 97 94 92 97 96

Running current A 0.3/ 0.3/

Indoor/Outdoor 11.0
Starting current A
Moisture removal lit/h 2.5 2.7 2.0 2.0

Noise

Refrigerant

Refrigerant control Capillary tube

Interconnection Connection type Flare connection
pipe Maximum length

INDOOR UNIT RAS-24GKHP-ES2 RAS-24GKP-ES2 RAS-18GKHP-ES2 RAS-18GKP-ES2

Dimensions Width mm 998

Net weight kg 13
Evaporator type Finned tube
Indoor fan type Cross flow fan

Air volume Medium fan m3/h 750 800 750 667 708 667

Fan motor output W 30
Air filter Honeycomb woven filter with PP frame
OUTDOOR UNIT RAS-24GAH-ES2 RAS-24GA-ES2 RAS-18GAH-ES2 RAS-18GA-ES2

Dimensions Width mm 780 780 780

Net weight kg 56 52 44 39
Condenser type Finned tube
Outdoor fan type Propeller fan
Airflow volume m3/h 2400 2550 2400 2550 2400 2550 2350 2450 2350 2450 2120 2200
Fan motor output W 42 42

Compressor

Safety device IOL, Td Sensor IOL IOL, Td Sensor IOL
Louver type Automatic louver
Usable outdoor temperature range °C 15 ~ 43 -10 ~ 24 21 ~ 43 15 ~ 43 -10 ~ 24 21 ~ 43

Note *1 Chargeless pipe

*2 Maximum pipe

Indoor (H/M/L) dB
Outdoor (220-240V) dB 56-57 57-58 56-57 52-53 53-54 51-52
Name of refrigerant R410A
Rated amount

Gas side size mm ∅12.7
Connection type Flare connection
Liquid side size mm ∅6.35

(One way) 25*
Maximum height

difference

Height mm 298

Depth mm 220

High fan m3/h 900 900 900 900 900 900

Low fan m3/h 625 667 625 543 584 543

Height mm

Depth mm 290

Model

PA290X3CS-4MU1

Output W 2160 1500

45/43/41/39/37

RAS-24GKHP-ES2 RAS-24GKP-ES2 RAS-18GKHP-ES2 RAS-18GKP-ES2

RAS-24GAH-ES2 RAS-24GA-ES2 RAS-18GAH-ES2 RAS-18GA-ES2

Cooling Heating Cooling Cooling Heating Cooling

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

kW 6.30 6.30 6.80 6.90 6.80

Hz

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

0.3/

0.3/

11.23

10.7

54

kg

m

m 8

1.90

0.3/11.75 0.3/12.20

11.45

2

10

715

6.85

54

1.70

PA225X2CS-4KU1

5.00 5.05 5.45

50

0.3/ 0.3/ 0.3/ 0.3/

8.3 7.9 7.8 7.6

1

15*

5.55

5.30

0.3/8.4 0.3/8.2

36

44/42/39/37/35

1.15

2

20*

550

290

5.35

33

1.26

550

290

- 3 -

Note : 1

· Capacity is based on the following temperature conditions.

FILE NO. SVM-06020

Condition

Temperature

Indoor unit inlet air temperature

Outdoor unit inlet air temperature

Note : 2

· Charge refrigerant according to the table below.

Refrigerant

*1

No need to charge
extra refrigerant

*2 Need to charge

extra refrigerant

RAS-24GKHP-ES2 / RAS-24GAH-ES2

RAS-24GKP-ES2 / RAS-24GA-ES2 RAS-18GKP-ES2 / RAS-18GA-ES2

Over 15m up to 25m (20g/m) Over 15m up to 20m (20g/m)

(DB) 27°C 20°C

(WB) 19°C 15°C

(DB) 35°C 7°C

(WB) 24°C 6°C

15m or less

JIS B8615-1

Cooling Heating

RAS-18GKHP-ES2 / RAS-18GAH-ES2

15m or less

- 4 -

2-1. Indoor Unit

FILE NO. SVM-06020

2. CONSTRUCTION VIEWS

75

7

51

Knock out system

Back body
Front panel

Grille inlet

298

Air inlet

Air outlet

998

75

56

220

Knock out system

50

50

75

8

Connection pipe (0.39 m)
(Flare ∅15.88)

Outline of indoor unit

55 or more

Minimum distance

to ceiling

298

∅65



100

20



48

998

763.5
450

Installation
Plate outline

- 5 -

Drain hose (0.54 m)

Connection pipe (0.49 m)
(Flare ∅6.35)

20

10

100

57

Wireless remote control

(For stud bolt ∅6)
(For stud bolt ∅8 -∅10)

29

41
55
5555



∅6

40

5

160

18

48

2.2 Outdoor Unit (24 Class)

28

600

50
36

R

15

FILE NO. SVM-06020

A

124109

6 hole

321

307

Ø

R

5.5

A Detail Drawing (Back leg)

HANDLE

290

321

Ø

Ø

715

86

25 Drain outlet

FAN-GUARD

436

275

90 600 90 69

2Ø11x14 Hole
(For

Ø8-Ø

10 anchor bolt)

B

307

321

Hole

6

Ø

11x14 Hole

Ø

36
50

B Detail Drawing (Front leg)

321
342

R

15

HANDLE

COVER-PV

Z

100 or more

321

100 or more

Z View

600

Air inlet

Air out

let

00 or more

6

Installation dimension

600 or more

4x

54

129

84

11 Long holes(For

Ø

Service port

10 anchor bolt)

Ø8-Ø

Electrical part cover

Liquid side
(Flare Ø6.35)

Gas-side
(Flare Ø15.88)

- 6 -

2.3 Outdoor Unit (18 Class)

28

600

50

36

321

307

A detail Drawing (Back leg)

R5.5

R

Ø

15

6 hole

86

321

Ø

FAN-GUARD

436

Ø

A

25 Drain outlet

109 124

2

-

Ø

11 x 14

(For 8 -

Ø

Ø

Hole

10 anchor bolt)

FILE NO. SVM-06020

307

321

Ø

6 hole

11x14 hole

Ø

B Detail Drawing (Front leg)

36
50

R

15

COVER-PV

Z

290

550

275

321
342

Electrical part cover

Liquid side
(Flare 6.35)

Ø

Gas side
(Flare 12.7)

Ø

5

4

Service port

Z View

9060090

69

129

84

100 or more

321

100 or more

600

Air intlel

Air outlel

600 or more

Installation dimension

- 7 -

600 or more

4x 11 Long holes(For 8- 10 anchor bolt)

Ø

Ø

Ø

3. WIRING DIAGRAM

3-1. RAS-24GKHP-ES2 / RAS-24GAH-ES2

COLOR IDENTIFICATION

BRW : BROWN
RED : RED
WHI : WHITE
YEL : YELLOW
BLU : BLUE
BLK : BLACK
GRY : GRAY

PNK : PINK
ORN : ORANGE
GRN : GREEN
GRN&YEL : GREEN & YELLOW

CN30
CN31

P04BLK

DSA

Varistor

F01

250V6.3A

MAIN P.C. BOARD
(WP-003)

Louver
motor

BLU

PNK

6

5 223311
5

6

FILE NO. SVM-06020

Infrared rays receive

and Indication parts

BLU

RED

YEL

BRW

ORN

4

CN07

4

BLU

1 2 3 4 65 10

98 1071 2 3

4 65
4 6

5

BLU

BLU

BLU

BLU

5 64

321

CN25

10

9871 2 3

BLU

BLU

BLU

WHI

98

7

CN13

10

8 9

7

+12 VDC

+5 VDC

WP-003

OUTDOOR
TERMINAL
BLOCK

C

S

R

COMPRESSOR TERMINAL

POWER SUPPLY
220- 240 V ~ 50 Hz

L

BLK

RED

BLK

RED

WHI
PNK

COMPRESSOR

i

N

FERRITE CORE

RED

MAGNETIC

CONTACTOR

R

S

1

1

GRN&YEL

T

A1

CN23

2

2

3

3

GRN&YEL

i

CHASSIS

Serial Signal

OUTDOOR
UNIT

52C

BLK

A2

W

RED

WHI
RED

FAN MOTOR

U

V

CAPACITOR CAPACITOR

S

C

R

GRY

BRW

BLK
BLK

RED
RED

BLK
BLK
WHI
RED
GRY

BLU

YEL

BLU

BLU
COIL FOR
4 WAY VALVE

YEL

1

2

1

2

145 C

TEMP FUSE

1

1
2

CN06

3

3

1

1

CN05

3

3

SG01

1

1

3

3

250VAC T6. 3A

5

5

CN01

7

7

9

9

1

CN11

313

11

CN02

33

circuit

TRANSFORMER

BLK BLK

4

3

66554

3

MAIN P.C. BOARD (MCC-890)

TNR
R74

F01

TNR
R73

RY07

CR11

RY05

CR12

CR13

CN03

1
1

RY06

3

CN07

CN08

DISCHARGE
PIPE
SENSOR (TD)

BLU

1

1
2
3

3

BLU

BLK

1

1
2
3

3

BLK

HEAT
EXCHANGER
SENSOR (TE)

- 8 -

3-2. RAS-18GKHP-ES2 / RAS-18GAH-ES2

COLOR IDENTIFICATION

BRW : BROWN
RED : RED
WHI : WHITE
YEL : YELLOW
BLU : BLUE
BLK : BLACK
GRY : GRAY

PNK : PINK
ORN : ORANGE
GRN : GREEN
GRN&YEL : GREEN & YELLOW

CN30
CN31

P04BLK

DSA

Varistor

F01

250V6.3A

MAIN P.C. BOARD
(WP-003)

Louver
motor

BLU

PNK

6

5 223311
5

6

FILE NO. SVM-06020

Infrared rays receive

and Indication parts

BLU

RED

YEL

ORN

BRW

4

CN07

4

BLU

1 2 3 4 65 10

98 1071 2 3

4 65
4 6

5

BLU

BLU

BLU

BLU

5 64

321

CN25

10

9871 2 3

WHI

BLU

BLU

BLU

98

7

CN13

10

8 9

7

+12 VDC

+5 VDC

WP-003

OUTDOOR
TERMINAL
BLOCK

C

S

R

COMPRESSOR TERMINAL

POWER SUPPLY
220-240 V~ 50 Hz

L

BLK

RED

BLK

RED

WHI
PNK

COMPRESSOR

CN23

INDOOR
TERMINAL
BLOCK

i

N

FERRITE CORE

RED

MAGNETIC

CONTACTOR

R

S

1

1

GRN&YEL

T

A1

2

3

2

3

i

CHASSIS

INDOOR
UNIT

OUTDOOR
UNIT

GRN&YEL

52C

BLK

A2

W

RED

WHI

D

RE

FAN MOTOR

U

V

CAPACITOR CAPACITOR

S

C

R

Serial Signal

circuit

TRANSFORMER

YEL

BLK

BLK

RED

RED

BLK

BLK

WHI

RED

GRY

BLU

YEL

BLU

BLU
COIL FOR
4 WAY VALVE

BLK

GRY

BRW

1

3

1

3

1

3

5

7

9

1

313

11

33

1

2

4

3

1

2

66554

3

145 C

TEMP FUSE

MAIN P.C. BOARD (MCC-890)

1
2

CN06

3

1

CN05

3

1

3

5

CN01

7

9

SG01

F01

250VAC T6. 3A

TNR
R74

CN11

CR11

CN02

CR12

CR13

CN03

1
1

BLK

RY07

RY05

3

TNR
R73

RY06

CN07

CN08

DISCHARGE
PIPE
SENSOR (TD)

BLU

1

1
2
3

3

BLU

BLK

1

1

2
3

3

BLK

HEA

T

EXCHANGER
SENSOR (TE)

- 9 -

3-3. RAS-24GKP-ES2 / RAS-24GA-ES2

COLOR IDENTIFICATION

BLK

CN27

BRW : BROWN
RED : RED
WHI : WHITE
YEL : YELLOW
BLU : BLUE
BLK : BLACK
GRY : GRAY

PNK : PINK
ORN : ORANGE
GRN : GREEN
GRN&YEL : GREEN & YELLOW

P04

6.3A

CN30
CN31

DSA
F01

Varistor

250V

Varistor

Louver
motor

BLU

PNK

6

5 223311

6

5

FILE NO. SVM-06020

Infrared rays receive

and Indication parts

1 2 3 4 6 10

BLU

BLU

BLU

YEL

RED

BRW

ORN

4

CN07

4

BLU

1 2 3 4 65 10

321

Power supply
circuit

Control
Fan motor
circuit

7

5 98

7

BLU

BLU

7

5 64

7

105 64321

8 9

CN25

BLU

BLU

BLU

WHI

98

CN13

10

8 9

OUTDOOR
TERMINAL
BLOCK

INDOOR
TERMINAL
BLOCK

POWER SUPPLY
220 − 240 V ~ 50 Hz

L

N

BLK

RED

BLK

RED

RED

1

1

BLK BLK

SPARK KILLER

A2 A1

52C

1/L1 2/T1

3/L2 4/T2

6/T35/L3

GRN&YEL

2

2

GRN&YEL

RED

CAPACITOR

3

3

GRY

CHASSIS

RED

WHI
PNK

COMPRESSOR

MAIN P.C. BOARD
(WP-003)

INDOOR
UNIT

OUTDOOR
UNIT

CAPACITOR

S

C

R

WHI
RED

FAN MOTOR

BLK

C

S

COMPRESSOR TERMINAL

2

1

21

1

GRY

BRW

YEL

1

2

6

4

3

1

2

6

554

3

145 C

TEMP FUSE

BLK2BLK

Thermo.
sensor

(TA)

CN03

Heat exchanger
sensor

(TC)

CN01

2

1

BLK

BLK

BLK

R

MAGNETIC CONTACTOR

- 10 -

3-4. RAS-18GKP-ES2 / RAS-184GA-ES2

COLOR IDENTIFICATION

BRW : BROWN
RED : RED
WHI : WHITE
YEL : YELLOW

BLK

GRN&YEL

BLU : BLUE
BLK : BLACK
GRY : GRAY
PNK : PINK
ORN : ORANGE
GRN : GREEN
GRN&YEL : GREEN & YELLOW

P04

CN30
CN31

CN27

6.3A

Varistor

DSA
F01

250V

MAIN P.C. BOARD
(WP-003)

Varistor

Louver
motor

BLU

YEL

PNK

6

5 223311

4

6

5

4

FILE NO. SVM-06020

Infrared rays receive

and Indication parts

5 98

1 2 3 4 6 10

BLU

BLU

BLU

BLU

BLU

RED

BRW

ORN

CN07

Power supply

circuit

Control
Fan motor
circuit

GRY

BRW

YEL

BLU

1 2 3 4 65 10

5 64

321

105 64321

8 9

7
7

BLU

7
7

8 9

CN25

BLU

BLU

WHI

98

CN13

10

2

1

21

1

BLK2BLK

CN03

CN01

2

1

BLK

BLK

OUTDOOR
TERMINAL
BLOCK

POWER SUPPLY
220 − 240 V ~ 50 Hz

L

BLK

MAGNETIC

CONTACTOR

BLK

RED

INDOOR

TERMINAL

BLOCK

N

RED

R

U

1

1

GRN&YEL

S

V

2

2

RED

SPARK KILLER

T

W

BLK

1

2

4

3

1

2

66554

3

145 C

TEMP FUSE

GRN&YEL

GRY

INDOOR
UNIT

OUTDOOR
UNIT

3

3

BLK

CHASSIS

(or A)

A1

(or B)

A2

Thermo.
sensor

(TA)

Heat exchanger
sensor

(TC)

CAPACITOR

RED

S

WHI
PNK

R

COMPRESSOR

S

COMPRESSOR TERMINAL

CAPACITOR

RED

C

BLK

WHI

RED

BLK

FAN MOTOR

C

R

- 11 -

FILE NO. SVM-06020

4. SPECIFICATION OF ELECTRICAL PARTS

4-1. Indoor Unit (RAS-24GKHP-ES2, RAS-18GKHP-ES2)

No. Parts name Type Specifications

1 Fan motor (for indoor) AFS-220-31-4A AC 200 − 240V, 31W
2 Thermo sensor (TA-sensor) ——— 10 kΩ at 25°C
3 Micro Power Module (M01) µRM1260V DC 390 V, Secondary DC 12 V
4 Microcontroller TMP87CM40AN
5 Heat exchanger sensor

(TC-sensor)
6 Line filter (L01) LC*SS11V-06270 27mH, 600mA
7 Diode (DB01) D3SBA60 4 A, 600 V
8 Capacitor (C63) EKMH401VSN470MP20S 4.7µF, 400 V
9 Fuse (F01) BET6.3A T6.3 A, 250 V

10 Varistor (R21, R22) TND15G561K 560 V

11 Resistor (R319) RF-2TK5R6 5.6Ω , 2 W
12 Louver motor 35BYJ46 Output (Rated) 2 W, 10 poles, 1 phase,

——— 10 kΩ at 25°C

DC 12 V

4-2. Outdoor Unit (RAS-24GAH-ES2)

No. Parts name Type Specifications

Output (Rated) 2200W, 2poles, 1 phase, 220 − 240V, 50Hz

1 Compressor PA290X3CS-4MU1 Winding resistance (Ω) Red-Black White-Black

(at 20°C) 1.13 2.10
Output (Rated) 42W, 4poles, 1 phase, 220 – 240V, 50Hz

2 Fan motor (for outdoor) FG-240-42A-1 Winding resistance (Ω) Red-Black White-Black

(at 20°C) 128 126

Running capacitor
3

(for fan motor)

Running capacitor
4

(for compressor)

Solenoid coil
5

(for 4-way valve)
6 Thermo sensor TE / TD 10kΩ at 25°C / 50kΩ at 25°C
7 Magnetic contactor CLK-35J 220 ~ 240V, 50Hz
8 Transformer TT-05 220 ~ 240V
9 Microcontroller TMP47C840N

10 Varistor (R73, R74) 15G471K 470V
11 Fuse (F01) TSCR T6.3A, 250V

451305L AC 450V, 3.0µF

RS44B506U0218S AC 440V, 50µF

VHV (STF) AC 220 ~ 240V

- 12 -

FILE NO. SVM-06020

4-3. Outdoor Unit (RAS-18GAH-ES2)

No. Parts name Type Specifications

Output (Rated) 1500W, 2poles, 1 phase, 220 − 240V, 50Hz

1 Compressor PA225X2CS-4KU1 Winding resistance (Ω) Red-Black White-Black

(at 20°C) 1.54 2.48
Output (Rated) 42W, 4poles, 1 phase, 220 – 240V, 50Hz

2 Fan motor (for outdoor) FG-240-42A-1 Winding resistance (Ω) Red-Black White-Black

(at 20°C) 128 126

Running capacitor
3

(for fan motor)

Running capacitor
4

(for compressor)

Solenoid coil
5

(for 4-way valve)
6 Thermo sensor TE / TD 10kΩ at 25°C / 50kΩ at 25°C
7 Magnetic contactor CLK-26J 220 − 240V, 50Hz
8 Transformer TT-05 220 − 240V
9 Microcomputer TMP47C840N

10 Varistor (R73, R74) 15G471K 470V
11 Fuse (F01) TSCR T6.3A, 250V

451305L AC 450V, 3.0 µF

RS44B506U0218S AC 440V, 50µF

VHV (STF) AC 220 − 240V

4-4. Indoor Unit (RAS-24GKP-ES2, RAS-18GKP-ES2)

No. Parts name Type Specifications

1 Fan motor (for indoor) AFS-220-31-4A AC 200 − 240V, 31W
2 Thermo sensor (TA-sensor) ——— 10 kΩ at 25°C
3 Micro Power Module (M01) µRM1260V DC 390 V, Secondary DC 12 V
4 Microcontroller TMP87CM40AN
5 Heat exchanger sensor

(TC-sensor)
6 Line filter (L01) LC*SS11V-06270 27mH, 600mA
7 Diode (DB01) D3SBA60 4 A, 600 V
8 Capacitor (C63) KMH400VSSN47M22S 4.7µF, 400 V
9 Fuse (F01) BET6.3A T6.3 A, 250 V

10 Varistor (R21, R22) TND15G561K 560 V

11 Resistor (R319) RF-2TK5R6 5.6Ω, 2 W
12 Louver motor

13 Relay : (RY04) G5NB-1A Coil DC 12V, 16.7mA, Contact AC 250V, 1A

35BYJ46 Output (Rated) 2 W, 10 poles, 1 phase,

——— 10 kΩ at 25°C

DC 12 V

- 13 -

FILE NO. SVM-06020

4-5. Outdoor Unit (RAS-24GA-ES2)

No. Parts name Type Specifications

Output (Rated) 2200W, 2poles, 1 phase, 220 − 240V, 50Hz

1 Compressor PA290X3CS-4MU1 Winding resistance (Ω  ) Red-Black White-Black

(at 20°C) 1.13 2.10
Output (Rated) 42W, 4poles, 1 phase, 220 − 240V, 50Hz

2 Fan motor (for outdoor) FG-240-42A Winding resistance (Ω) Red-Black White-Black

(at 20° C) 128 126

Running capacitor

3

(for fan motor)
Running capacitor

4

(for compressor)

5

Magnetic contactor

CLK-35J

451305L AC 450V, 3.0µ F

RS44B506U0218S

AC 440V, 50µ F

220 − 240V, 50Hz

4-6. Outdoor Unit (RAS-18GA-ES2)

No. Parts name Type Specifications

Output (Rated) 1500W, 2poles, 1 phase, 220 − 240V, 50Hz

1 Compressor PA225X2CS-4KU1 Winding resistance (Ω) Red-Black White-Black

(at 20°C ) 1.54 2.48

Output (Rated) 42W, 6poles, 1 phase, 220 − 240V, 50Hz

2 Fan motor (for outdoor) WLF-240-42A-1 Winding resistance (Ω) Red-Black White-Black

(at 20°C) 188 289

Running capacitor

3

(for fan motor)
Running capacitor

4

(for compressor)

5

Magnetic contactor

451205L AC 450V, 2.0µF

RS44B506U0218S AC 440V, 50µF

CLK-26J

220 − 240V, 50Hz

- 14 -

5. REFRIGERATION CYCLE DIAGRAM

5-1. RAS-24GKHP-ES2 / RAS-24GAH-ES2

FILE NO. SVM-06020

0.39m
(Connecting pipe)

12.7

∅

O.D.:12.7mm

Cooling

Heating

Tank

Indoor unit

Cooling

Heating

P

Packed valve

(∅

12.7)

Gas container connection (Reinstall etc.)

Heating

4-way valve

Cooling

Compressor

PA290X3CS-4MU1

Heat exchanger

Cross flow fan

T1

Packed valve

(∅

6.35)

Main

2.0x1500

∅

s

0.

49m

(Connecting pipe)

6.35

∅

O.D.:6.35mm

Condenser

Cooling
Heating

Propeller fan

Outdoor unit

Mark(

Refrigerant
R410A 1.

)means check points of Gas Leak.

90 kg

Ambient temp.

50Hz

Standard

pressure

(MPaG)

P

Surface temp. of heat

exchanger interchanging

pipe

T1

(°C)

Fan speed

(indoor)

conditions DB/WB

(°C)

Indoor Outdoor

Standard 3.0 48.2 High 20/– 7/6

Heating Overload*1 3.93 56.4 Low 27/– 24/18

Low temperature 2.17 38.4 High 20/– –10/–10
Standard 3.03 8.7 High 27/19 35/24

Cooling Overload 4.02 12.1 High 32/23 43/26

Low temperature 2.1 0.3 Low 21/15 21/15

Note :

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

*1 • During heating overload operation, a value for the high temperature limit control operation is included.

- 15 -

5-2. RAS-18GKHP-ES2 / RAS-18GAH-ES2

FILE NO. SVM-06020

0.39m
(Connecting pipe)

∅

12.7

O.D.:12.7mm

Cooling

Heating

Indoor unit

Cooling

Heating

P

Packed valve

(

∅

Heating

4-way valve

Cooling

Compressor

12.7)

PA225X2CS-4KU1

Accumulator

Evaporator

Cross flow fan

T1

Packed valve

∅

6.35)

(

Capillary tube

∅

2.0x1200

s

0.49m
(Connecting pipe)

∅

6.35

O.D.:6.35mm

Condenser

Cooling
Heating

Propeller fan
Outdoor unit

Mark(

Refrigerant
R410A 1.

)means check points of Gas Leak.

15 kg

Ambient temp.

50Hz

Standard

pressure

(MPaG)

P

Surface temp. of heat

exchanger interchanging

pipe

T1

(°C)

Fan speed

(indoor)

conditions DB/WB

(°C)

Indoor Outdoor

Standard 2.6 44.7 High 20/– 7/6

Heating Overload*1 3.0 ~ 3.6 49.0 ~ 56.0 Low 27/– 24/18

Low temperature 2.0 32.0 High 20/––10/–10
Standard 0.9 9.5 High 27/19 35/24

Cooling Overload 1.1 12.6 High 32/23 43/26

Low temperature 0.7 2.4 Low 21/15 21/15

Note :

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

*1 • During heating overload operation, a value for the high temperature limit control operation is included.

- 16 -

5-3. RAS-24GKP-ES2 / RAS-24GA-ES2

FILE NO. SVM-06020

0.39m
(Connecting pipe)

12.7

∅

O.D.:12.7mm

Cooling

Compressor

Indoor unit

Cooling

P

Packed valve

(∅

12.7)

Gas container connection (Reinstall etc.)

Accumulator

PA290X3CS-4MU1

Heat exchanger

Cross flow fan

T1

Packed valve

∅

6.35)

(

Capillary tube

2.0x900

∅

s

0.49m
(Connecting pipe)

∅

6.35

O.D.:6.35mm

Condenser

Refrigerant
R410A 1.70kg

)means check points of Gas Leak.

Cooling

Propeller fan
Outdoor unit

Mark(

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 3.183 7.0 High 27/19 35/24

Cooling Overload 4.040 11.7 High 32/23 43/26

Low temperature 1.651 -0.4 Low 21/15 21/15

Note :

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

- 17 -

5-4. RAS-18GKP-ES2 / RAS-18GA-ES2

FILE NO. SVM-06020

0.39m
(Connecting pipe)

∅

12.7

O.D.:12.7mm

Cooling

Compressor

Indoor unit

Cooling

P

Packed valve

(

∅

12.7)

PA225X2CS-4KU1

Evaporator

Cross flow fan

T1

Packed valve

∅

6.35)

(

Capillary tube

1.7x400

∅

s

0.49m
(Connecting pipe)

∅

6.35

O.D.:6.35mm

Condenser

Cooling

Propeller fan
Outdoor unit

Mark(

Refrigerant
R410A 1.

)means check points of Gas Leak.

26 kg

Ambient temp.

50Hz

Standard

pressure

(MPaG)

P

Surface temp. of heat

exchanger interchanging

pipe

T1

(°C)

Fan speed

(indoor)

conditions DB/WB

(°C)

Indoor Outdoor

Standard 1.1 10.0 High 27/19 35/24

Cooling Overload 1.2 13.0 High 32/23 43/26

Low temperature 0.6 2.0 Low 21/15 21/15

Note :

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

- 18 -

6. CONTROL BLOCK DIAGRAM

6-1. RAS-24GKHP-ES2, RAS-18GKHP-ES2

Indoor Unit Control Panel

Heat Exchanger Sensor

Functions

• Louver Control

FILE NO. SVM-06020

M.C.U.

Operation

Display

Temperature Sensor

Infrared Rays Signal Receiver

Infrared

Rays

Remote

Control

From Outdoor Unit

220 ~ 240 V AC 50 Hz

Initiallizing Circuit

Clock Frequency

Oscillator Circuit

Power Supply

Circuit

Noise Filter

• 3-minute Delay at Restart for Compressor

• Motor Revolution Control

• Processing

(Temperature Processing)

• Timer

• Serial Signal Communication

Louver ON/OFF Signal

Louver Driver

Serial Signal Transmitter/Receiver

Serial Signal Communication

Timer

Display

Filter Sign

Display

PRE DEF.

Sign Display

Hi Power

Sign Display

Indoor

Fan Motor

Louver Motor

REMOTE CONTROL

Infrared Rays

Remote Control

Operation ( )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

Hi power

TIMER 1.3.5.9H

COMFORT SLEEP

QUIET

- 19 -

6-2. RAS-24GKP-ES2, RAS-18GKP-ES2

Indoor Unit Control Panel

Heat Exchanger Sensor

Functions
 Louver Control

FILE NO. SVM-06020

M.C.U.

Operation

Display

Temperature Sensor

Infrared Rays Signal Receiver

Infrared

Rays

Remote

Control

From Outdoor Unit

220 ~ 240V AC 50Hz

Initiallizing Circuit

Clock Frequency
Oscillator Circuit

Power Supply

Circuit

Noise Filter

 3-minute Delay at Restart for Compressor

 Motor Revolution Control

 Processing

(Temperature Processing)

 Timer

Outdoor unit

ON/OFF Signal

Relay Driver

Relay RY04

Outdoor Unit

Louver ON/OFF Signal

Louver Driver

Timer

Display

Filter Sign

Display

Fan Only

Sign Display

Hi Power

Sign Display

Indoor

Fan Motor

Louver Motor

REMOTE CONTROL

Infrared Rays

Remote Control

Operation ( )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

TIMER 1.3.5.9H

COMFORT SLEEP

QUIET

- 36 -

7. OPERATION DESCRIPTION

7-1.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 controller 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 setting of the indoor heat
exchanger by the heat exchanger sensor

· Louver motor control

· Indoor fan motor operation control

· LED display control

· T ransferring 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.

FILE NO. SVM-06020

· Compressor operation

control

· Operation control of
outdoor fan motorf
Turning off the compressor and outdoor fan

·
when the outdoor unit receives the shutdown
command

· Defrost control in heating operation
(Temperature measurement by the outdoor heat
exchanger and control for the four-way valve
and the outdoor fan motor) *Heat pump Model
only

7-1-1. Louver contr

ol

(1) Vertical air flow louver

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

(2) Swing

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

7-1-2. Indoor fan control (AC Fan motor)

(1) The indoor fan is operated by the stepless speed

change AC motor

.

(2) For air flow level, speed of the indoor fan motor is

controlled in five steps (LOW, LOW
and HIGH). If AUTO mode is selected, the fan
motor speed is automatically controlled by the
difference between the preset temperature and

the room temperature.

Operations according
to the commands
from the indoor unit

+

, MED, MED

+

Table 7-1-1

FAN TAP

OPERATION
MODE

RAS-24GKHP Series

RAS-18GKH Series

Model

RAS-24GKP Series

RAS-18GKP Series

Cooling
Heat
Fan Only
Dry

rpm
Air Flow volume(m /h)
rpm
Air Flow volume(m /h)
rpm
Air Flow volume(m /h)
rpm

Air Flow volume(m /h)

3

3

3

3

900

−

−

−

−

1300

900

UH H

H M+ M

13001300

900

1300

900

1300

900

M+

M+ M

1250 1200

830

1150

750

1250

830

1150

750

M L+

MUH H

1150 1050 1000 900 800 700

790

750

1100

1050

667

708

1150

−

−

750

1050

−

667

−

Note : Under some function of setting. The fan motor is controlled automatically.

Then LOW+ = LOW + MED and MED

2

+

= MED + HIGH

2

- 20 -

L L- UL SUL/SL-

380
600

300

700
380
600

300

SUL/SL-

600
300
500

220

−

−

−

−

L L­L L-

625
900
543

1000

625

900
543

UL

UL SUL

461

543

700

800

380

461

800

900

461

543

700

800

380

461

L-LL+
L+
L+

667
950
584

1050

−

−

667
950

−

584

−

FILE NO. SVM-06020

7-2. Description of Operation Circuit

(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.

7-2-1. 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. 7-2-1. When
[FAN] button is set to LOW, LOW
HIGH, the motor operates with a constant air flow.

+

, MED, MED+ or

7-2-2. 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. 7-2-2.

ON

4-way valve

Compressor

Outdoor fan

(Heat pump model)

Preset
temp.

0.5

ON

OFF OFF OFF ON

0

Fig. 7-2-2

display lamp

OPERATION

+3
+2.5

(Preset temp.)

-

+2
+1.5
+1
+0.5

(Room temp.)

Preset
temp.

0

(Preset temp.: 24°C)

NOTE :
*1: The values marked with *1 are calculated and

controlled by the difference in motor speed
between M+ and L-.

(2)

The Hi Power, ECO and COMFORT SLEEP
operation cannot be set.

Fig. 7-2-1 Setting of air flow [FAN:AUTO]

M+

*1
*1

*1

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

motor operates as shown in Fig. 7-2-3. When
[FAN] button is set to LOW, LOW

+

, MED, MED+ or

HIGH, the motor operates with a constant air flow.

(Preset temp.)

-

(Room temp.)

Preset
temp.

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

0

-0.5

M+

*1
*1
*1

NOTE :
*1: The values marked with *1 are calculated and

controlled by the difference in motor speed
between M+ and L-.

Fig. 7-2-3 Setting of air flow [FAN:AUTO]

- 21 -

FILE NO. SVM-06020

7-2-3. 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. 7-2-4.

ON:6min.

OFF:4min.

ON:5min.

OFF:5min.

OFF

4-way valve

Outdoor fan

Preset
temp.

+3

+2

+1

ON:6min.

OFF:4min.

OFF

ON:5min.

OFF:5min.

OFF

0

Compressor

Fig. 7-2-4

ON

display lamp

OPERATION

7-2-4. Heating operation *Heat pump model only

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

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

operation display lamp are controlled as shown in
Fig. 7-2-6.

Preset
temp.

OFF

ON

ON

Compressor

ON

OFF

ON

4-way valve

Outdoor fan

OPERATION

Fig. 7-2-6

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. 7-2-5.

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. 7-2-5

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

only.

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

motor operates as shown in Fig. 7-2-7. When
[FAN] button is set to LOW, LOW

+

, MED, MED+ or

HIGH, the motor operates with a constant air flow.

Preset
temp.

0

-0.5

-1

-1.5

-2

-5.0

-5.5

[FAN AUTO]

L

*1
*2

+

M

H

*1, *2 : The values marked with *1 and *2 are

calculated and controlled by the difference in
motor speed between M+ and L.

Fig. 7-2-7 Setting of air flo w [FAN:AUTO]

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

- 22 -

FILE NO. SVM-06020

(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. 7-2-8 and Table 7-2-1.

Manual
(One of

AUTO

*4

SUL*
SUL*1

Stop

5 speed)

L-H
(Up to
setting

3

speed)

*2

A+4 A+4

464534

33

33 21
32 20

A-8 A-8

*6 *5

NOTES :

*1: The fan stops for 2 minutes after thermostat-OFF.
*2: A is 24°C when the preset temperature is 24°C or

more and A is the preset temperature when it is

under 24°C.
*3: SUL means Super Ultra Low.
*4: Calculated from difference in motor speed

between SUL and HIGH.

7-2-5. 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. 7-2-9. The Fan only operation
continues until the room temperature reaches a
level at which another mode is selected.

(2) Temporary Auto

When the TEMPORARY 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. 7-2-9.

C

Cooling operation

The louver moves to the position same
as Hi POWER operation.

+4

Cooling operation

0

Fan only operation

Fig. 7-2-8 Cold draft preventing control

*5 and *6:

Table 7-2-1

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

Heating operation

(Room temp.) - (Preset temp.)

RAS-24GKHP-ES2
RAS-18GKHP-ES2

RAS-24GKP-ES2
RAS-18GKP-ES2

Fig. 7-2-9

- 23 -

FILE NO. SVM-06020

62

55
54

Compressor

Outdoor fan

OFF

OFF

ON

ON

OFF

ON

Heat exchanger
temp.

7-3.Hi POWER Mode

([Hi POWER] button on the remote
control is pressed.)

When [Hi POWER] button is pressed while the indoor
unit is in Auto, Cooling or Heating operation,
Hi POWER mark is indicated on the display of the
remote control and the unit operates as follows.

(1) Automatic operation

· The indoor unit operates in according to the
current operation.

(2) Cooling operation

· The preset temperature drops 3°C.
(The value of the preset temperature on the
remote control does not change.)

·

 If the room temperature is higher than the

setting temperature by 3.5 °C or more, the

horizontal louver moves to the Hi POWER
position automatically. Then when the room

temperature is °C less than the setting
temperature the horizontal louver returns

automatically.

·

 FAN speed : [AUTO]

If the temperature is higher than the
setting temperature by 3.5°C or mor, the
air conditioner operates at maxim airflow

level. If the temperature is higher than the

setting temperature by less than 3.5°C, the air
conditioner operates at normal airflow level.

·

 FAN speed : One of 5 levels

If the temperature is higher than the

setting temperature by 3.5°C or more, the
air conditioner operates at higher consecutive
airflow level. If the room temperature is higher

than the setting temperature by less than 3.5°C,
the air conditioner operates at normal airflow
level.

7-4.High-Temperature Limit Control

*Heat pump model only

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.

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.

Heat exchanger
temperature

6

2

Compressor Outdoor fan

ON

Less than continues

for 5 minutes

OFF

Fig. 7-5-1

7-6.Defrost Operation *Heat pump model only

(3) Heating operation (UKH Series only)

·

 The preset temperature increases 2°C,

(The value of the preset temperature on the
remote control does not change.)

 The indoor unit operates in normal heating

·

mode except the preset temperature is higher
(+2°C).

(4) The Hi POWER mode can not be set in Dry or

Fan only operation.

When the indoor unit is in heating operation, if the
refrigerant evaporation temperature detected by the
outdoor heat exchanger sensor is under the specified
temperature, the outdoor unit starts the defrosting
operation. At this time, the 4-way valve relay and the
outdoor fan motor are turned off. The indoor fan motor
is also turned off by the cold draft preventing control of
the indoor microcomputer. Then, [PRE. DEF.] lamp on
the indoor unit comes on.
The defrosting operation stops and the 4-way valve
relay, outdoor fan motor and the indoor fan motor are
turned on automatically when the refrigerant
evaporation increases to the specified temperature, or
when the defrosting time is over 12 minutes.

- 24 -

FILE NO. SVM-06020

7-6-1. Defrost starting condition

A-Zone : If -10°C > Teo ≥ − 18°C, defrost will

start when.
Teo - Te ≥ 2.5°C at teat 20 sec or

~ 30 min after operation.

B-Zone : If Te ≤ −18°C, defrost start instantaneously

(Suddenly) 00 ~ 25 min ofter operation

C-Zone : If -2ºC ≥ Teo ≥ −10°C defrost will start when

Teo - Te ≤ −3°C at least 20 sec or ~ 60 min
after operation.

7-6-2. Defrost finish condition.

1) If Te ≥ 3°C at least 60 sec -->4 way value on.

2) If Te ≥ 8°C --> 4 way value on.

Timing

Operation time (4 Loops = Tt)

Td1

Td2

Td3 Td4

Finish time recordStart time record

Defrost time rate : (Td/Tt) x 100
Heating time rate : (Tt - Td) x Tt

Fig. 7-6-2

- 25 -

FILE NO. SVM-06020

7-7. 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.

7-7-1. 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 [TEMPORARY] 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 [TEMPORARY] button for more The unit is on standby.
than three seconds.

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

→
→

After approx. three seconds,

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 [TEMPORARY]

TEMPORARY button

TEMPORARY button

0

0

3S

3S

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

When the unit is in operation

Operation Motions

Push [TEMPORARY] 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,

0

TEMPORARY button

TEMPORARY button

0

3S

3S

The unit beeps three times.

If the unit is required to operate at this time, push [TEMPORARY]
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

• While the filter check lamp is on, the

[TEMPORARY] button has the function of filter
reset button.

has been selected.

• When the unit is turned on by this function, the

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

- 26 -

7-7-2. 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 [TEMPORARY] button for more The unit is on standby.
than three seconds.

→

FILE NO. SVM-06020

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

→

After approx. three seconds,

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 [TEMPORARY]

TEMPORARY button

TEMPORARY button

0

0

3S

3S

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

When the unit is in operation

Operation Motions

Push [TEMPORARY] 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,

0

0

3S

3S

TEMPORARY button

TEMPORARY button

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

The unit beeps three times.

If the unit is required to operate at this time, push [TEMPORARY]
button once more or use the remote control to turn it on.

7-8. Filter Check Lamp

operation, the orange lamp is on.

When the elapsed time reaches 1000 hours, the filter

7-7-3. 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

7-8-1. How to turn off filter check lamp

cancelled. Therefore, set the timer operation again.

Press [FILTER] button on the remote control.
OR push [TEMPORARY] button on the indoor unit.

Note:

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

- 27 -

y

y

g

g

play

g

(

(

y

p

g

)

y

g Op

g

g

p

g

g

y

g

(

(

y

g

g

)

y

g

g

g

p

FILE NO. SVM-06020

7-9. Self-Cleaning function.

Self-Cleaning function is designed to reduce humidity that causes mold to form inside the air conditioning unit.
This advanced, efficient s
fan activates and dries the moisture in the coil for 20 minutes, then turns off automaticall

stem reduces moisture in the coil. When you turn off your air conditioner, the internal

.

Operation display

FCU fan

FCU louver OPEN CLOSE CLOSE

Timer display

Compressor

CDU fan

rpm is depend on preseting. rpm is SUL speed.

depend on preseting of timer function. depend on preseting of timer function.

depend on preseting per room temperature.

depend on preseting per room temperature.

Cool mode or dry mode Self-Cleaning mode

operation more than 10 mins. operate 20 mins.

ON OFF OFF

ON ON

ON or OFF

ON or OFF

ON or OFF

Turn off by remote controller

or timer-off function.

ON

OFF OFF

OFF OFF

Automatically turn-off.

ON or OFF

• The Self-Cleaning function is set as default at ex-factory.

• Self-Cleaning operation can stop manually by press [ ] botton of the remote
control two more time.

7-9-1. How to cancel Self-Cleanin

To cancel the Self-Cleanin

Press [TEMPORARY] button one time or use remote control to

•

function, proceed as follows:

function

turn on air conditioner. The OPERATION dis
oran

e color (When AUTO-RESTART is ON) or green color

When AUTO-RESTART is OFF).

Hold down the [TEMPORARY] button for more than 20 seconds.

•

The air conditioner will stop suddenl

when the [TEMPORARY] is

ressed but keep holding it continue. Then will beep 3 times in

the first 3 seconds but it is not related to Self-Cleanin

After holding about 20 seconds, the air conditioner will beep 5

•

times without an

The Self-Cleanin

•

blinking of display.

eration had been concelled.

OFF

Operation time

will show in

function

TE MPO R AR Y buttonTE MPO R AR Y button

Remarks

Per settin

•

of Self-Cleaning function above, AUTO-RESTART

function had been cancelled. To set AUTO-RESTART a

lease follow item 7-7-1.

7-9-2. How to set Self-Cleanin

To set the Self-Cleanin

Press [TEMPORARY] button one time or use remote control to

•

function, proceed as follows.

turn on air conditioner. The OPERATION displa

e color (When AUTO-RESTART is ON) or green color

oran

function.

will show in

When AUTO-RESTART is OFF).

Hold down the [TEMPORARY] button for more than 20 seconds.

•

The air conditioner will stop suddenl

pressed but keep holdin

it continue. Then will beep 3 times is

the first 3 seconds but it is not related to Self-Cleanin
After holding about 20 seconds, the air conditioner will beep

•

5 times and OPERATION displa

The Self-Cleanin

•

function had been set.

when the [TEMPORARY] is

function

blinks 5 times.

Remarks

Per settin

•

of Self-Cleaning function above, AUTO-RESTART

function had been cancelled. To set AUTO-RESTART a

lease follow item 7-7-1.

- 28 -

ain,

ain,

FILE NO. SVM-06020

7-10. QUIET Mode

Quiet mode is the system which, control the
revolving speed of indoor fan to work constantly

at lower than speed L. In addition, noise level of
indoor unit is less than usual.

When the [QUIET] button is pressed, the fan of the
indoor unit will be restricted the revolving speed at

speed L

again (cancel Quiet mode).

Remarks :

1. Quiet mode is unable to work in dry mode.

2. Quiet mode is appropriate to work with less

-

until the [QUIET] button is pressed once

cooling load and less heating load condition.
Because of the fan speed L- may cause not

enough the cooling capacity or heating capacity.

7-11. COMFORT SLEEP mode

The principles of comfort sleep mode are:

• Quietness for more comfortable.

• Save energy by changing room temperature

automatically.

• The air condition can shut down by itself

automatically.

7-11-1. Cooling mode

• The fan speed of indoor unit operates automatically,

it relates with the compressor's operation.

Compressor’s Operation Fan Speed

-

ON L

OFF SL

• The preset temperature will increase 1°C after the

Comfort sleep mode has operated for 1 hour and
the temperature will increase another 1°C after the
comfort sleep mode has operated for 2 hour. (The
value of the preset temperature on the remote control

does not change.)

• Press the [COMFORT SLEEP] button to choose the

operating hours. Repeat pressing to select the hours.
(1hr, 3hr, 5hr or 9hr)

• If the [COMFORT SLEEP] button is pressed again

means cancel comfort sleep mode.

7-11-2. Heating mode

• The fan speed of indoor unit operates automatically,

it relates with the compressor's operation.

Compressor’s Operation Fan Speed

ON L

OFF SL

-

Remarks:

1. Comfort sleep mode will not operate in dry mode

and fan only mode.

2. Comfort sleep mode is appropriate to work with less

cooling load and less heating load condition.

Because of the fan speed L- may cause not enough
the cooling capacity or heating capacity.

• The preset temperature will drop down 1°C after the

comfort sleep mode has operated for 1 hour and the
temperature will decrease another 1°C after the
comfort sleep mode has operated for 2 hour. (The

value of the preset temperature on the remote control.
dose not change.)

• Press the [COMFORT SLEEP] button to choose the

operating hours. Repeat pressing to select the hours.
(1hr, 3hr, 5hr or 9 hr)

• If the [COMFORT SLEEP] button is pressed again

means cancel comfort sleep mode.

- 29 -

FILE NO. SVM-06020

8-3-3. Installation/Servicing tools
<Changes in the product and components>

In the case of an air conditioner using R410A, 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 withstand strength of the refrigerant piping, flare processing diameter and
size of opposite side of flare nuts have been changed. (for copper pipes with nominal dimensions 1/2 and 5/8)

New tools for R410A

New tools for R410A Applicable to R22 model Changes

Gauge manifold As pressure is high, it is impossible to measure by

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

Charge hose In order to increase pressure withstand 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.

Electronic balance As pressure is high and gasification speed is fast,
for refrigerant charging it is difficult to read the indicated value by means

of a charging cylinder, as air bubbles occur.

Torque wrench The size of opposing side of flare nuts have been
(nominal dia. 1/2, 5/8) increased.

Incidentally, a common wrench is used for nominal
diameters 1/4 and 3/8.

Flare tool By increasing the clamp bar’s receiving hole,
(clutch type) strength of spring in the tool has been improved.

Gauge for projection Used when flare is made by using conventional
flare adjustment tool.

Vacuum pump adapter Connected to conventional vacuum pump. It is

Gas leakage detector Exclusive for HFC refrigerant.

—

necessary to use an adapter to prevent vacuum
pump oil from flowing back to the charge hose.
The charge hose connecting part has two ports­one for conventional refrigerant (7/16 UNF 20
threads per inch) and one for R410A. If the
vacuum pump oil (mineral) mixes with R410A,
a sludge may occur and damage the equipment.

• Incidentally, the “refrigerant cylinder” comes with the refrigerant designation (R410A) 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.

- 35 -

8. INSTALLATION PROCEDURE

8-1. Safety Cautions

For general public use

Power supply cord of Outdoor unit shall be more than 4 mm
sheathed flexible cord) or 3.5 mm2 (AWG-12).

FILE NO. SVM-06020

2

(H07RN-F or 245 IEC66 : polychloroprene

CAUTION

•

THIS AIR CONDITIONER USES THE NEW HFC REFRGERANT (R410A), WHICH DOES NOT DESTROY
THE OZONE LAYER.

R410A refrigerant is apt to be affected by impurity such as water, oxidizing membranes, and oils because the
pressure of R410A refrigerant is approx. 1.6 times of refrigerant R22. As well as the adoption of this new
refrigerant, refrigerating machine oil has also been changed. Therefore, during installation work, be sure that
water, dust, former refrigerant, or refrigerating machine oil does not enter into the refrigerating cycle of a
new-refrigerant air conditioner.
To avoid mixing refrigerant and refrigerating machine oil, the sizes of charging port connecting sections on
the main unit are different from those for the conventional refrigerant, and different size tools are also
required. Accordingly, special tools are required for the new refrigerant (R410A) as shown below. For
connecting pipes, use new and clean piping materials with high-pressure withstand capabilities, designed for
R410A only, and ensure that water or dust does not enter. Moreover, do not use any existing piping as its
pressure withstand may be insufficient, and may contain impurities.

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.
If this is not possible, a power supply plug with earth must be used. This plug must be easily accessible after
installation. The pl
appliance completely from the mains.

New Refrigerant Air conditioner Installation

To Disconnect the Appliance from the Main Power Supply.

ug must be disconnected from the power supply socket in order to disconnect the

- 30 -

FILE NO. SVM-06020

DANGER

• FOR USE BY QUALIFIED PERSONS ONLY.

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

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

• CONNECT THE CONNECTING CABLE CORRECTLY. IF THE CONNECTING CABLE IS CONNECTED

WRONGLY, ELECTRIC PARTS MAY BE DAMAGED.

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

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

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

• TO PREVENT OVERHEATING THE INDOOR UNIT AND CAUSING A FIRE HAZARD, PLACE THE UNIT

WELL AWAY (MORE THAN 2 M) FROM HEAT SOURCES SUCH AS RADIATORS, HEATORS,
FURNACE, STOVES, ETC.

• WHEN MOVING THE AIR-CONDITIONER FOR INSTALLING IT IN ANOTHER PLACE AGAIN, BE VERY

CAREFUL NOT TO GET THE SPECIFIED REFRIGERANT (R410A) WITH ANY OTHER GASEOUS
BODY INTO THE REFRIGERATION CYCLE. IF AIR OR ANY OTHER GAS IS MIXED IN THE
REFRIGERANT, THE GAS PRESSURE IN THE REFRIGERATION CYCLE BECOMES ABNORMALLY
HIGH AND IT RESULTINGLY CAUSES BURST OF THE PIPE AND INJURIES ON PERSONS.

• IN THE EVENT THAT THE REFRIGERANT GAS LEAKS OUT OF THE PIPE DURING THE

INSTALLATION WORK, IMMEDIATELY LET FRESH AIR INTO THE ROOM. IF THE REFRIGERANT GAS
IS HEATED BY FIRE OR SOMETHING ELSE, IT CAUSES GENERATION OF POISONOUS GAS.

WARNING

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

switches.

• Do not install in a place which cannot bear the weight of the unit.

Personal injury and property damage can result if the unit falls.

• Before doing the electrical work, attach an approved plug to the power supply cord.

Also, make sure the equipment is properly earthed.

• Appliance shall be installed in accordance with national wiring regulations.

If you detect any damage, do not install the unit. Contact your TOSHIBA dealer immediately.

CAUTION

• Exposure of unit to water or other moisture before installation could result in electric shock.

Do not store it in a wet basement or expose to rain or water.

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

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

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

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

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

tions for proper installation.

REQUIREMENT OF REPORT TO THE LOCAL POWER SUPPLIER

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

Remark per EMC Directive 89/336/EEC

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

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

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

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

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

- 31 -

FILE NO. SVM-06020

8-2. Installation Diagram of Indoor and Outdoor Units

Hook

65 mm or more

(Atta

c

h to th

e f

r

on

t panel) (A

ttac

6 Bio enzyme & Gingko filter
5 Sasa Zeolite Vitamin C filter

170 mm

or more

A

h to

ir

filter

the air filter)

1 Installation

plate

170 mm

or more

Shield

pipe

For the rear left and left
piping

Wall

Insert the cushion between
the indoor unit and wall,
and lift 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.

Before installing the
wireless remote control

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

2 Wireless remote control

Cover

3 Batteries

1

0

0

m

m

o

r

m

o

r

e

600 mm or more

8 Pan head wood screw

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

Right

4 Remote control holder

Rear

Bottom

Rear

left

Left

2 Wireless remote control

Insulate the refrigerant
pipes separately with
insulation, not together.

Vinyl tape
Apply after carrying
out a drainage test.

Saddle

Extension

e

r

Extension drain hose

(Not available,

e

provided by installer)

mor

or

m

m

100

1

0

0

m

m

o

r

m

o

r

e

o

or m

m

m

0

10

600 mm or more

drain hose

(Not available,
provided by
installer)

6 mm thick heat resisting
polyethylene foam

ore

m

or

m

m

0

0

6

600

m

m

or

m

o

r

e

18 Class 24 Class

ore

or m

m

m

0

0

6

6

0

0

m

m

o

r

m

o

r

e

- 32 -

8-3. Installation

8-3-1. Optional installation parts

FILE NO. SVM-06020

Part

Code

Parts name

Refrigerant piping
Liquid side :

A

Gas side :
Pipe insulating material

B

(polyethylene foam, 6 mm thick)

C

Putty, PVC tapes

∅

6.35 mm

∅

12.7 mm

<Fixing bolt arrangement of outdoor unit>

124 mm109 mm

321 mm

28 mm

86 mm

Air outlet

25

Æ

600 mm

Air inlet

Q'ty

One

each

1

One

each

116 mm

90 mm

Drain outlet

Fig. 8-3-1.

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

• Use 

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

• If it is necessary to drain the defrost water, attach drain nipple 10 to the bottom plate of the outdoor unit

before installing it.

- 33 -

8-3-2. Accessory and installation parts

FILE NO. SVM-06020

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 2

6

Bio enzyme & Gingko filter x 2

Part

No.

Part name (Q'ty)

7

Mounting screw ∅ 4 x 25 x 8

l

8

Pan head wood screw
∅ 3.1 x 16 x 2

l

9

Drain nipple* x 1

10

Cap water proof* x 2

(For Heat pump model only)

The part marked with asterisk (*) is packaged with the
outdoor unit.

(For Heat pump model only)

- 34 -

FILE NO. SVM-06020

8-4. Indoor Unit

8-4-1. Installation place

• A place which provides the spaces around the

indoor unit (See Fug 8-2).

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

and outlet.

• A place that allows easy installation of the piping to

the outdoor unit.

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

CAUTION

• Direct sunlight to the indoor unit’s wireless

receiver should be avoided.

• The microprocessor in the indoor unit should not

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

<Remote control>

• A place where there are no obstacles such as a

curtain that may block the signal from the indoor
unit.

• Do not install the remote control in a place exposed

to direct sunlight or close to a heating source, such
as a stove.

• Keep the remote control at least 1 m apart from the

nearest TV set or stereo equipment. (This is
necessary to prevent image disturbances or noise
interference.)

• The location of the remote control should be

determined as shown below.

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

plate

<Cutting a hole>

When installing the refrigerant pipes from the rear.

Pipe
hole

65 mm

The center of the pipe
hole is above the arrow.

100 mm

Fig. 8-4-2

1. After determining the pipe hole position on the

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

NOTE

• When drilling a wall that contains a metal lath, wire

lath or metal plate, be sure to use a pipe hole brim
ring sold separately.

<Mounting the installation plate>

ndoor unit

I

(Side view)

7 m

°

5

7

Reception
range

Remote
control

(Top view)

Indoor unit

Reception
range

* : Axial distance

Fig. 8-4-1

5 m

5 m

55

Hook

45

°

45

°

Remote control

* 7 m

170

120

Pipe hole

Indoor unit

Hook

Thread

Weight

Hook

Pipe hole

7 Mounting screw

65

1

Installation
plate

Fig. 8-4-3

- 37 -

FILE NO. SVM-06020

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

1. Securely fit the installation plate onto the wall by

screwing it in the upper and lower parts to hook up
the indoor unit.

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

3. Install the installation plate horizontally in the wall.

CAUTION

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

Installation plate
<Keep horizontal direction>

Anchor
bolt

Projection

5 mm dia. hole

15 mm or less

8-4-3. Electrical work

1. The supply voltage must be the same as the rated

voltage of the air conditioner.

2. Prepare the power source for exclusive use with the

air conditioner.

NOTE

2

• Wire type : More than 1.5 mm

245 IEC66) or 1.3 mm

(H07RN-F or

2

(AWG-16)

CAUTION

• This appliance can be connected to the mains in

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

NOTE

• Perform wiring works so as to allow a generous

wiring capacity.

7 Mounting

screw

ss

∅4 x 25

s

ss

Clip anchor
(local parts)

Fig. 8-4-4

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 mounting screws

7 .

NOTE

• Secure four corners and lower parts of the
installation plate with 6 to 7 mounting screws to
install it.

- 38 -

FILE NO. SVM-06020

8-4-4. Wiring connection

Air inlet grille

Terminal
cover

Screw

2

1

Terminal block

Cord clamp

Screw

Front panel

Earth
line

CAUTION

• Be sure to refer to the wiring system diagram

labeled inside the front panel.

• Check local electrical cords and also any specific

wiring instructions or limitations.

Connecting cable

about 15 cm

Fig. 8-4-6

<Stripping length of connecting cable>

10

10

40

50

Connecting cable

Fig. 8-4-5

<How to connect the connecting cable>
Wiring of the connecting cable can be carried out

without removing of 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 local
cords) into 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.

Earth line

Fig. 8-4-7

NOTE

Use stranded wire only.

• Wire type : More than 1.5 mm 2 (H07RN-F or

245 IEC66) or 1.3 mm

2

(AWG-16)

Fig. 8-4-8

NOTE

Connect the earth line to the metallic part (i mark)
located at the side of 3P terminal.

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

• When attaching the air inlet grille, the contrary of

the removed operation is performed.

Fig. 8-4-9

- 39 -

FILE NO. SVM-06020

8-4-5. Piping and Drain Hose Installation
<In case of rightward piping>

• After scribing slits of the body-right by a knife or a
making-off pin, cut them by a pair of nippers or the
like.

Slit (Body-right)

Fig. 8-4-10

<In case of downward piping>

• After scribing slits of the body-right by a knife or a
making-off pin, cut them by a pair of nippers or the
like.

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

(To the forefront of flare)

400 mm

300 mm

R 30 mm (Use polisin (polyethylene)
core or the like for bending pipe.)

43 mm

80

Liquid side

Gas side

Outward form of indoor unit

Use the handle of screwdriver, etc.

Fig. 8-4-12

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.

Slit (Body-right)

Fig. 8-4-11

<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.

CAUTION

• Bind the auxiliary pipes (two) and connecting

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

Indoor unit

Auxiliary pipes

Installation plate

• Carefully arrange pipes so that any pipe does not

stick out of the rear plate of the indoor unit.

• Carefully connect the auxiliary pipes and

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

• Since dewing results in a machine trouble, make

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

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

it.

Connecting cable

Drain hose

- 40 -

FILE NO. SVM-06020

8-4-6. 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

Fig. 8-4-13

• For detaching the indoor unit from the installation
plate, pull the indoor unit toward you while

pressing

its bottom up at the specified parts.

8-4-7. Drainage

1. Run the drain hose sloped downwards.

NOTE

• Hole should be made at a slight downward slant on

the outdoor side.

Do not form the
Do not rise the
drain hose.

50 mm
or more

Do not put
the drain
hose end
into water.

drain hose into

a wavy shape.

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

Fig. 8-4-15

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.

PressPress

Fig. 8-4-14

Press

(unhook)

Shield pipe

Drain hose

Inside the room

Extension drain hose

Fig. 8-4-16

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.

Wall

Drain guide

Space for pipes

- 41 -

Fig. 8-4-17

8-5. Outdoor Unit

8-5-1. Installation place

• A place which provides the spaces around the

outdoor unit as shown in the installation diagram



of indoor and outdoor unit.

•

A place which can bear the weight of the outdoor

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

• A place where the operation noise and discharged

air do not disturb your neighbors.

• A place which is not exposed to a strong wind.

• A place free of a leakage of combustible gases.

• A place which does not block a passage.

• When the outdoor unit is to be installed in an

elevated position, be sure to secure its feet.

• An allowable length of the connecting pipe is up
15 m. (Refer to the table of TO CHARGE
REFRIGERANT for detail.)

• An allowable height level is up to 8 m.

• A place where the drain water does not raise any

problem.

FILE NO. SVM-06020

8-5-2. Refrigerant piping connection

1. Cut the pipe with a pipe cutter.

90°

Obliquity

Fig. 8-5-2

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

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

Die

Pipe

Fig. 8-5-3

Rigid (Clutch type)

Roughness Warp

A

CAUTION

1. Install the outdoor unit without anything blocking

the air discharging.

2. When the outdoor unit is installed in a place

exposed always exposed to strong wind like a
coast or on a high storey of a building, secure
the normal fan operation using a duct or a wind
shield.

3. In particularly windy areas, install the unit such

as to avoid admission of wind.

4. Installation in the following places may result in

trouble.
Do not install the unit in such places.

• A place full of machine oil.

• A saline-place such as the coast.

• A place full of sulfide gas.

• A place where high-frequency waves are likely

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

Strong

wind

Fig. 8-5-1

Outer dia. R410A Conventional

of copper pipe tool used tool used

6.35 0 to 0.5 1.0 to 1.5

12.70 0 to 0.5 1.0 to 1.5

Imperial (wing nut type, conventional tool)

Outer dia.

of copper pipe

R410A

6.35 1.5 to 2.0

12.70 2.0 to 2.5

<Tightening connection>

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

CAUTION

• Do not apply excess torque.

• Otherwise, the nut may crack depending on the

conditions.

- 42 -

FILE NO. SVM-06020

(Unit : N·m)

Outer dia.

of copper pipe

Tightening torque

∅6.35 mm 16 to 18 (1.6 to 1.8 kgf·m)
∅9.52 mm 30 to 42 (3.0 to 4.2 kgf·m)

∅12.70 mm 50 to 62 (5.0 to 6.2 kgf·m)

• Tightening torque of flare pipe connections

The operating pressure of R410A is higher than that of
R22. (Approx. 1.6 times). It is therefore necessary to
firmly tighten the flare pipe connecting sections (which
connect the indoor and outdoor units) up to the
specified tightening torque. Incorrect connections may
cause not only a gas leakage, but also damage to the
refrigerant cycle.

Flare at indoor unit side

Flare at outdoor unit side

Fig. 8-5-4

Flare nutHalf union

Externally
threaded side

Use a wrench to secure.

Use a torque wrench to tighten.

Internally
threaded side

Fig. 8-5-5

8-5-3. Evacuating

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

AIR PURGE

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

<Using a vacuum pump>

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

1. Connect the charge hose from the manifold valve to

the service port of the gas side packed valve.

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

pump.

3. Open fully the low pressure side handle of the

gauge manifold valve.

4. Operate the vacuum pump to start evacuating.

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

5. Close the low pressure side valve handle of gauge

manifold.

6. Open fully the valve stem of the packed valves

(both side of Gas and Liquid).

7. Remove the charging hose from the service port.

8. Securely tighten the caps on the packed valves.

CAUTION

•

KEEP IMPORTANT 4 POINTS FOR PIPING WORK

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

connecting pipes.)

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

VACUUM PUMP.

(4) Check gas leak (connected points)

- 43 -

Compound pressure gauge

–101 kPa (–76 cmHg)

Handle Lo

Charge hose (For R410A only)

Connecting pipe

Packed valve
at liquid side

Pressure gauge

Manifold valve

Handle Hi
(Keep full closed)

Charge hose (For R410A only)

Vacuum pump adapter
for counter-flow
prevention
(For R410A only)

Vacuum

pump

Packed valve at gas side

Service port (Valve core (Setting pin))

Fig. 8-5-6

FILE NO. SVM-06020

TO CHARGE REFRIGERANT

Refrigerant

No need to charge
refrigerant

Need to charge Over 15 m up to Over 15 m up to
refrigerant 25 m (20g/m) 20 m (20g/m)

24 Class

15 m or less 15 m or less

18 Class

<Packed valve handling precautions>

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

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

Gas side 50 to 62 N·m
(∅12.70 mm) (5.0 to 6.2 kgf·m)

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

Service port

9 to 10 N·m
(0.9 to 1.0 kgf·m)

Hexagonal wrench
is required.

4 mm

8-5-4. Wiring connection

1. Remove the valve cover from the outdoor unit.

2. Connect the connecting cable to the terminal as

identified with their respective matched numbers on
the terminal block of indoor and outdoor unit.

3. When connecting the connecting cable to the

outdoor unit terminal, make a loop as shown in the

installation diagram of indoor and outdoor unit, to

prevent water coming in the outdoor unit.

4. Insulate the unused cords (conductors) from any

water coming in the outdoor unit. Proceed them so
that they do not touch any electrical or metal parts.

<Stripping length of connecting cable>

Terminal block

LN 1 32

Terminal
screw

Cord clamp

Power supply cord

10

60

N

L

10

70

70

Earth line

Screw

Cord clamp

Connecting cable

123

10

10

80

Fig. 8-5-7

Earth line

Power supply cord

Connecting cable

Fig. 8-5-8

Model

Power source 50 Hz, 220 ∼ 240 V Single phase
Maximum running current 18A 16A
Plug socket & fuse rating

Power cord

24 Class

20A 20A

2

(H07R N-F or 245 IE C 66)

4 mm
or 3.5 mm2 (AWG -12)

CAUTION

• Wrong wiring connection may cause some

electrical parts burn out.

• Be sure to comply with local codes on running

the wire from indoor unit to outdoor unit (size of
wire and wiring method etc).

• Every wire must be connected firmly.

NOTE: Connecting cable

• Wire type: More than 1.5 mm

245 IEC66) or 1.3 mm

- 44 -

2

(H07RN-F or

2 (AWG-16)

18 Class

FILE NO. SVM-06020

8-6. How to Set Remote Control Selector

Switch

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

<Remote control selector switch>

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

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

1. Set the remote control selectors witch with the
indoor unit.

1) Turn the circuit breaker of the main power switch off
before setting the selector switch.

2) Remove the Air inlet grille and Front panel. (Refer to
Chapter 10-1, procedure 1 )

3) Open the Electrical part cover (Refer to chapter
10-1, procedure 2 ), then cut the jumper (J90)
with only the nippers.

2. Set the remote control selector switch with the
remote control

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

1) Load the remote control with the batteries.

2) Press the [CHECK] button using something with
sharp point. (The preset temperature on the remote
control changes to [00].)

3) Press the [MODE] button while pressing the
[CHECK] button, [B] is indicted at the right of the
present temperature display.

• To reset the switch to the [A] setting, press the
[MODE] button again while pressing the [CHECK]
button.

CAUTION

Do not use any other sharp tools (such
as cutters, pliers, or the like). Such tools

may cause breakage or damage.

See Fig. 8-6-1

Fig. 8-6-1

[MODE] button

[CHK] button

Fig. 8-6-2

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

- 45 -

FILE NO. SVM-06020

8-7. Others

8-7-1. Gas leak test

Flare nut connections
(Indoor unit)

Flare nut connections
(Outdoor unit)

B

A

Valve stem cap connection

Service port cap connection

Valve stem cap connection

Fig. 8-7-1

• Check the flare nut connections, valve stem cap

connections and service port cap connections for
gas leak with a leak detector or soap water.

8-7-2. Test operation

8-7-3. Auto restart setting

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

Information

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

<How to set the auto restart>

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

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

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

TE MPO R AR Y button

Fig. 8-7-2

- 46 -

9. TROUBLESHOOTING CHART

FILE NO. SVM-06020

9-1. T r oub leshooting Pr ocedure :

9-2-2. Incorrect cable connection between Indoor

and outdoor units

Follow the details of 9-2. Basic Check Items.
If there is no trouble corresponding to 9-2, check
whether or not there are faulty parts following

9-4. Self-Diagnosis by Remote Control.

9-2. Basic Check Items

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

9-2-1. Power supply voltage

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

9-2-3. Program control

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

Table 9-2-1

No. Operation of air conditioner Descriptions

1 When the main power supply is turned

on, the OPERATION lamp on the
indoor unit blinks.

2 The indoor fan motor speed does not

change in the Dry operation.

3 The compressor is not turned off even

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

4 The compressor is not turned on and

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

*5 The PRE-DEF. lamp is indicated when

the Heating operation starts.

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

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

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

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

The PRE-DEF. lamp is indicated during the Defrosting operation or if
the indoor heat exchanger temperature is low when the Heating
operation starts. At this time, the indoor fan motor stops to prevent
cold air from blowing in the room.

*6 The outdoor fan motor stops in the

Heating operation.

7 The compressor is not turned on even

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

8 The operation mode changes in the

Automatic operation.

9 The Fan only operation continues in the

Automatic operation.

10 The ECO operation or Hi-POWER

operation does not work.

11 When [Hi POWER] button is pressed,

the display on the remote control does
not change at all.

Note *5 and *6 are for Heat pump model :

When the indoor heat exchanger temperature is high, the outdoor fan
motor is stopped by the high-temperature limit control operation.

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

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

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

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

The display on the remote control does not change when
[Hi POWER] button is pressed. However the microcontroller gives
commands to change the preset temperature and air flow level.

- 47 -

FILE NO. SVM-06020

9-3. Primary Judgement

9-3-1. Role of indoor unit controller

The indoor unit controller receives the operation
commands from the remote control and executes
them.
 Temperature measurement at the air outlet of the

·

indoor heat exchanger by the indoor temperature
sensor

 Temperature setting of the indoor heat exchanger by

·

the heat exchanger sensor

 Louver motor control

·

 Indoor fan motor operation control

·

 LED display control

·

 Transferring of operation commands to the outdoor

·

unit

Table 9-3-1

Lamps Self-diagnosis

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)

9-3-2. Failure diagnosis

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

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

G OPERATION, TIMER and PRE-DEF.

(or FAN ONLY for cooling only model) lamps
are blinking.

Table 9-3-2 Diagnosis by detective operation

Symptom Check Primary judgement

The remote control
does not work.

The outdoor fan
does not rotate.

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

The compressor operates.

The compressor does not operate.

Cycle failure
 Gas shortage or other refrigerant cycle trouble

·

 Heat exchanger sensor open, break or short

·

·

 Overload relay or thermostat trouble of compressor

The remote control
still does not work.

The remote control
works.

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

OK.

The outdoor unit (Outdoor fan
motor) is defective.

An internal part of the
compressor or P.C. board is
defective.

- 48 -

9-4. Self-Diagnosis by Remote Control

(Check Code)

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

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

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

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

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

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

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

FILE NO. SVM-06020

(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.

- 49 -

Table 9-4-1

Block level Diagnosis function

Check

code code status

Block

Indoor
P.C. board

Cable
connection

Outdoor
P.C. board

Other parts
(including
compressor)

Check

Symptom

The indoor thermo sensor (TA) is
defective.
Disconnection or short-circuit

The indoor heat exchanger
sensor (TC) is defective.
Disconnection or short-circuit

The indoor fan motor or its circuit
is defective.

The part other than the above
parts on the indoor P.C. board is
defective.
EEPROM access error

IOL operation

The serial signals can not be
transmitted and received between
indoor and outdoor units.

• The crossover wire is
connected wrongly.

• The serial signal transmitting
circuit on the outdoor P.C. board
is defective.

• The serial signal receiving
circuit on the indoor P.C. board
is defective.

The operation command signals
are not transmitted from the
indoor unit to the outdoor unit.

The outdoor thermo sensor (TE)
is defective.
Disconnection or short-circuit

The outdoor heat exchanger (TD)
sensor is defective.
Disconnection or short-circuit

The reply serial signal has been
transmitted when starting the
unit, but stops being transmitted
shortly after.

1. Compressor thermo operation

• Gas shortage

• Gas leak

2. Instantaneous power failure

The discharge temperature is
over 120°C.

The IOL operation is defective.

Unit

Operation
continues.

Operation
continues.

All off

Operation
continues.

All off

Operation
continues.

Operation
continues.

All off

All off

Operation
continues.

All off

All off

Condition

The lamp on the
indoor unit blinks
when error is
defected.

The lamp on the
indoor unit blinks
when error is
defected.

The lamp on the
indoor unit blinks
when error is
defected.

The lamp on the
indoor unit blinks
when error is
defected.

The lamp on the
indoor unit blinks
when error is

.

defected
The lamp on the

indoor unit blinks
when error is
defected.

The lamp on the
indoor unit blinks
when error is
defected. And it
returns to the
normal condition
when recovering
from errors.

The lamp on the
indoor unit blinks
when error is
defected.

The lamp on the
indoor unit blinks
when error is
defected.

The lamp on the
indoor unit blinks
when error is
defected. And it
returns to the
normal condition
when recovering
from errors.

The lamp on the
indoor unit blinks
when error is
defected.

The lamp on the
indoor unit blinks
when error is
detected.

FILE NO. SVM-06020

Judgement and action

1. Check the indoor thermo sensor (TA).

2. Check the indoor P.C. board.

1. Check the indoor heat exchanger
sensor (TC).

2. Check the indoor P.C. board.

1. Check the connector circuit of the
indoor fan motor (CN10).

2. Check the indoor fan motor.

3. Check the indoor P.C. board.

1. Check the indoor P.C. board.
(EEPROM and peripheral circuits)

Overload operation of refrigerating cycle

1. In the case of the outdoor unit not
operating at all;

• Check the crossover cable and

connect it properly.

• Check the outdoor P.C. board.

2. In the case of the outdoor unit operating
normally;

• Check whether or not both of serial

LED (Green) and serial LED (Orange)
is blinking.
If the serial LED (Green) is not
blinking, check the outdoor P.C. board.
If the serial LED (Orange) is not
blinking, check the indoor P.C. board.

If the operation command signals continue
to be transmitted between 2 and 3 of the
indoor terminal block, replace the outdoor
P.C. board.

1. Check the outdoor thermo sensor (TE).

2. Check the outdoor P.C. board.

1. Check the outdoor heat exchanger
sensor (TD).

2. Check the outdoor P.C. board.

1. Repeatedly turn the indoor unit on and
off with the interval of approx. 10 to 40
minutes. (The check code is not
indicated during operation.) And supply
gas. (Check gas leak.)

2. The indoor unit operates normally
during the check.
If the reply serial signal continues to be
transmitted between 2 and 3 of the
indoor terminal block, replace the
outdoor P.C. board.
If the signal stops between them,
replace the indoor P.C. board.

1. Check the heat exchanger sensor (TD).

2. Gas purging

When turning on the unit, the normal
phase (RST) is detected but T-R waveform
has not been detected for 120 seconds or
more.

- 50 -

9-5. How To Diagnose Faulty Parts

[04 Serial signal error] (Heat pump model)

FILE NO. SVM-06020

Operation

Check item

Conceivable principle cause

Measure

Does outdoor

unit operate?

YES

NO

Are 1, 2 and 3 crossover

wires connected properly?

YES

Is connector

connected properly?

YES

Does LED (Orange) on

outdoor P.C. board blink?

YES

Does LED (Green) on

outdoor P.C. board blink?

YES

NO

NO

NO

NO

Outdoor P.C. board

is defective.

Indoor P.C. board

is defective.

Item by symptoms

Connect crossover

wires properly.

Connect connector

properly.

Replace

P.C. board.

Replace

P.C. board.

[08 Four-way valve error] (Heat pump model)

Does four-way valve

operate properly?

YES

Is TC sensor

resistance value

(10kΩ at 25°C) normal?

NO

NO

YES

Does coil terminal

have 220 − 240 V

in heating operation?

YES

Are circuit

wires normal?

YES

Is outdoor P.C. board

normal?

YES

YES

NO

NO

Four-way valve

is defective.

Outdoor P.C. board

is defective.

(CN11 220 − 240V)

Indoor P.C. board

is defective.

Replace

Four-way valve

Circuit check/modification

Replace

P.C. board.

Replace

P.C. board.

Replace TC sensor.

- 51 -

[09 Other cycle error] (1) (Heat pump model)

FILE NO. SVM-06020

NO

Replace TC

sensor.

YES

Connect TC

sensor properly.

Does compressor operate?

YES

Is compressor

turned off shortly?

NO

Is TC sensor

resistance value

(10kΩ at 25°C) normal?

YES

Is TC sensor

disconnected from

the sensing element?

NO

NO

YES

Does inner

overload relay

(in compressor)

operate?

NO

Is circuit wiring

normal?

YES

Is outdoor P.C.

board normal?

YES

YES

NO

NO

Check charged amount of refrigerant.

Check defective overload.

Check compressor.

Failure

compressor.

Wiring check/modification

Outdoor P.C. board

is defective.

Indoor P.C. board

is defective.

Replace

Replace

P.C. board.

Replace

P.C. board.

[09 Other cycle error] (2)

NO

Connect

connector

properly.

NO

Replace

condenser.

NO

Replace

fan motor.

Is connector

connected properly?

Is condenser normal?

Is indoor fan

motor normal?

YES

YES

YES

NO

Does indoor
fan operate?

Are filters clogged?

Is TC sensor

resistance value

(10kΩ at 25°C) normal?

Is charged amount

of refrigerant normal?

Is outside air

low load?

YES

NO

YES

YES

NO

YES

NO

NO

YES

Anti-freezing operation

Anti-freezing operation

Clean filters.

Replace

TC sensor.

Charge

refrigerant.

Indoor P.C. board

is defective.

- 52 -

Replacd

P.C. board.

[0C Indoor TA sensor error]

FILE NO. SVM-06020

Is CN04 (TA sensor connector)

connected properly?

YES

Is TA sensor resistance value

(10 kΩ at 25

°C)

YES

normal?

[0d Indoor TC sensor error]

Is CN05 (TC sensor connector)

connected properly?

YES

NO

NO

NO

Indoor P.C. board is defective.

Connect CN04 properly.

Replace TA sensor.

Replace P.C. board.

Connect CN05 properly.

Is TC sensor resistance value

(10 k

Ω

at 25°C) normal?

YES

NO

Indoor P.C. board is defective.

[18 outdoor TE sensor error] (Heat pump model)

Is TE sensor connector

connected properly?

YES

Is TE sensor resistance value

(10 k

Ω

at 25°C) normal?

YES

NO

NO

Replace TC sensor.

Replace P.C. board.

Connect connector

properly.

Replace TE sensor.

Indoor P.C. board is defective.

- 53 -

Replace P.C. board.

[19 outdoor TD sensor error] (Heat pump model)

FILE NO. SVM-06020

Is TD sensor

connected properly?

YES

Is TD sensor resistance value

(50 k

Ω

at 25°C) normal?

YES

NO

NO

Outdoor P.C. board is defective.

[1E Discharge temp. error] (Heat pump model)

Connect connector

properly.

Replace TD sensor.

Replace P.C. board.

Is protective

controller such as discharge

thermostat normal?

YES

Is charged amount

of refrigerant normal?

YES

Is overload relay normal?

NO

Is TD sensor resistance value

(50 kΩ at 25°C) normal?

YES

NO NO

NO

YES

NO

Are wires connected

to connector properly?

Outdoor P.C. board is defective.

Connect wires to

connector properly.

Check and modify charged

amount of refrigerant.

Unit operates normally.

Replace TD sensor.

Replace P.C. board.

- 54 -

FILE NO. SVM-06020

Operation

Measure

Item by symptoms

Check item

Conceivable principle

cause

9-6.

Troubleshooting for Indoor unit

9-6-1. Power can not be turned on. (The unit does not operate at all.)

<Primar check>

(1) Is the supply voltage normal?
(2)Is the connection to the AC output OK?
(3) Is the fuse (F01) blown?

Turn off power
supply once, and 5
second later, turn it

on again.

NO

Is OPERATION

lamp blinking?

YES

Does

Is it possible to

turn on power

supply by

pressing

[START/STOP]

button on remote

control?

YES

NO

transmission

mark on

remote

control flash

normally, and

is its signal

transmitted

properly?

YES

NO

Remote control is

defective.

Refer to 9-9

ÒTroubleshooting for

Remote Control.Ó

Is DC 310 -

340V across

C63?

Are DC 12V,

across C66?

YES

YES

NO

NO

Is fuse (F01)

control board

Is voltage (DC

12V or 5V)

NO

indicated on
rear of indoor
control board

Turn off breaker

once and turn it

on again after

removing motor.

of indoor

blown?

normal?

NO

YES

YES

Parts (R21,
R22, SG01,

C01, DB01,

C02,

M01 and IC04)

are defective.

Are DC 12V,

across C66?

YES

- 55 -

NO

Does the fan

motor

connector

between 1

and 2 short-

circuit?

NO

Microcomputer is

defective.

M01 is

def

ec

tive.

Unit operates

normally.

YES

Replace main P.C.

board.

Replace motor.

FILE NO. SVM-06020

9-6-2. Only the indoor fan does not operate

<Primary chec k>

(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.)

Shut off the

power supply once.

Turn the power supply.

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?

YES

NO

NO

NO

Control P.C. board is defective.

Does AC 120V

or higher voltage apply

to between red and black

lead of fan motor?

YES

Shut off the power supply.

Does the cross flow
fan rotate normally?

YES

Turn on the power supply.

Operation

stops

NO

NO

Replace the P.C. board.

Does connecting

terminal, connecting

cable or power supply

cord completely?

Does not found the short

wire about connecting

cable and power cord?

YES

Repair the
bearing of

the fan.

Motor control circuit failure

(IC30, IC03, D38, R25, R26, Q17)

or 12V power circuit failure.

Replace the P.C. board.

of incompleted connecting.

NO

Thermal fuse operated

due to prevent

temperature rising cause

Normal

Is the rotation signal (DC+5V-0V)

output between 2 (gray lead wire)

and 3 (brown lead wire) of the motor

connector (CN11) when rotating

the cross flow fan by hand in no

operating status?
(1 pulse/one turn)

YES

Replace the control

P.C. board.

- 56 -

NO

Replace the fan motor

Replace connecting

the cable (or power cord),

thermal fuse and

terminal block.

FILE NO. SVM-06020

9-6-3. Compressor does not operate.
<Primary check>

(1) Is the preset temperature higher than the room temperature in cooling operation?
(2) Is the crossover cable connected properly?

<Inspection procedure>

Turn on power supply.

Does OPERATION

lamp blink?

YES

Does miniature relay RY04

switch on and off due to

temperature changes?

YES

Is it possible to detect AC

220 – 240V between 2

and 3 on terminal block?

YES

Are all of compressor cords normal?

YES

Is compressor motor winding

normal?

(Check winding resistor.)

YES

Is capacitor for compressor normal?

NO

NO

NO

Is resistance value of thermo

sensor (TA) and heat ex-

changer sensor (TC) normal?

Microcomputer is defective.

Miniature relay RY04 is

defective.

NO

NO

NO

NO

YES

Compressor is defective.

Capacitor is defective.

Refer to 9-6-1 “Power

can not be turned on”.

Thermo sensor or

heat exchanger

sensor is defective.

Replace thermo sensor

or heat exchanger

sensor.

Replace P.C. board.

Rewire or replace

defective cords.

Replace compressor.

Replace capacitor.

YES

Is overload relay normal?

YES

Does compressor start?

YES

Does compressor stop after a while?

YES

Is gas quantity normal?

(Check gas pressure.)

YES

Compressor is defective.

YES

Replace P.C. board.

NO

NO

NO

Overload relay is

defective.

Compressor is defective.

Gas shortage (Gas leak)

- 57 -

Replace overload relay.

Replace compressor.

Supply gas.

<Inspection procedure>

- Cooling model -

Turn on power supply.

FILE NO. SVM-06020

Does OPERATION

lamp blink?

YES

Is it possible to start

unit by remote control?

YES

Is it possible to detect AC 200V

between 2 and 3 on terminal block?

YES

Is crossover cable normal?

YES

Are all of compressor cords normal?

YES

Is compressor motor winding normal?

(Check winding resistor.)

YES

Is capacitor for compressor normal?

YES

NO

NO

NO

NO

NO

NO

NO

Compressor is defective.

Capacitor is defective.

Refer to item Power

can not be turned on .

Refer to 9-9 Troubleshooting

for Remote Control .

Replace P.C. Board

Connect crossover

cable properly.

Rewire or replace

defective cords.

Replace compressor.

Replace compressor.

Is overload relay normal?

YES

Does compressor start?

YES

Does compressor stop after a while?

YES

Is gas quantity normal?

(Check gas pressure.)

YES

Compressor is defective.

YES

Replace P.C. borad

NO

NO

NO

Overload relay is defective.

Compressor is defective.

Gas shortage (Gas leak)

Replace overload relay.

Replace compressor.

Supply gas.

- 58 -

<Inspection procedure)

- Heating model -

AC 70-100V

FILE NO. SVM-06020

Replace transformer

outdoor

P.C. board.

- 59 -

YES

FILE NO. SVM-06020

Are all of compressor cords normal?

YES

Is compressor motor winding normal?

(Check winding resistor.)

YES

Is capacitor for compressor normal?

YES

Is overload relay normal?

YES

Does compressor start?

YES

Does compressor stop after a while?

YES

Is gas quantity normal?

(Check gas pressure.)

YES

NO

NO

NO

NO

NO

NO

Compressor is defective.

Capacitor is defective.

Overload relay is defective.

Compressor is defective.

Gas shortage (Gas leak)

Rewire or replace

defective cords.

Replace compressor.

Replace capacitor.

Replace overload relay.

Replace compressor.

Supply gas.

Compressor is defective.

YES

Replace compressor.

- 60 -

FILE NO. SVM-06020

9-7. Troubleshooting for Wiring (Interconnect cable and Serial Signal Wire)

9-7-1. Outdoor unit does not operate.
<Inspection procedure>

(1) Is the voltage between and of the indoor terminal block varied?

1

(2) Are signals from the indoor unit to the outdoor unit transmitted correctly based upon the following diagram?

NOTE:

 Measure the voltage for 2 minutes and 30 seconds after starting the unit.


Heatpump model

Terminal block on indoor side

Red

2

3

White

2

1

Terminal block

Tester

Normal condition : Voltage varied between AC70 ~ 100V
Abnormal condition : Voltage does not vary.

Cooling model

Terminal block on indoor side

Red

White

3

2

1

Terminal block

Tester

Fig. 9-7-1

Normal condition : After start operated about 2 minutes and 30 seconds. Voltage between 2 and 3 of the

of the indoor's Terminal block should be equal AC 220 ~ 240V (For Asia model), AC 220V
(For Thai model).

Abnormal condition : Don't found voltage AC 220 ~ 240V (For Asia model), AC 220V (For Thai model) from

terminal block (0V)

9-7-2. Outdoor unit stops a while after starting the unit.

<Confirmation procedure> Select one of 3 cases below and follow the procedure.

(1) The outdoor unit stops between 10 and 20 minutes passed after starting and it takes 10 minutes or more to

restart the unit.

Gas has a low circulation.

Measure gas pressure.

Compressor is turned off and on automatically by thermo sensor

(Heat pump Model) or thermostat (Cooling only Model).

Gas shortage
Gas leak
Pipe clogging

(2) The outdoor unit stops once, it would not operate until the power is turned on again.

Refer to 9-6-4 "Compressor does not operate"

(3) The outdoor unit stops between 10 minutes to 1 hour after starting and a check code is indicated on the

remote control. (Check code 03-1E : Refer to Table 9-4-1.)

- 61 -

FILE NO. SVM-06020

9-8. Troubleshooting for P.C. board

9-8-1. How to check indoor P.C. board
<Cautions for handling P.C. board>

(1) When removing the front panel and the P.C. board,

be sure to turn off the power supply.

(2) When removing the P.C. board, hold the edge of

the P.C. board and do not apply force to the parts.

(3) When connecting or disconnecting the connectors

on the P.C. board, hold the housing. Do not pull at
lead wires.

<Inspection procedure>

(1) If the P.C. board is detective, check for disconnec-

tion, burn or discoloration of the copper foil pattern
of the P.C. board.

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

a. Main P.C. board parts.

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

b. Infrared rays parts:

Infrared rays receiving circuit

Check the defects of the P.C. board with Table 9-8-1.

Table 9-8-1 Inspection pr ocedure

No. Procedure Check points Causes

1 Turn off the power supply and

remove the P.C. board assembly
from electric parts base. Remove
the connecting cables from the
terminal block.

2 Remove the connector of the motor

and turn on the power supply. If
OPERATION lamp blinks (once per
second), it is not neccessary to
check steps (1 to 3) in the right
next column.

Check whenther or not the fuse (F01)
is blown.

Check power supply voltage;

1. Between CN30 and CN31
(220 − 240 V AC) : Except

2. Between + and − of C63
(DC310 − 340 V)

3. Between 12 V and GND

4. Between 5 V and GND

Impluse voltage was applied or the
indoor fan motor short-circuited.

1. The terminal block or the
crossover cable is connected
wrongly.

2. The capacitor (C01 and C02 )
line filter (L01), resistor (R319), or
the diode (DB01) is defective.

3. C65, C66 and M01 are defective.

4. IC04, C05, C06 and C07 are
defective.

3 Press [ ] button once

to start the unit. (Do not set the
mode to Fan Only or On-Timer
operation).

4 Shorten the line of the restart delay

timer and start unit.

Check power supply voltage;
<Heat pump model>

1. Between CN31 and CN23
(DC15 − 60 V)

<Cooling only model>

1. Between connector of Q24 and
GND (for relay coil (DC12 V))

2. Between 1 and 2 of terminal
block for connecting cable

Check whether or not all lamps
(OPERA TION, TIMER, PRE.-DEF.
(or FAN ONLY), FILTER.and Hi Power)
are indicated for 3 seconds and they
return to normal 3 seconds later.

<Heat pump model>
IC32 and IC33 are defectice.

<Cooling only model>

1. The wire of the relay coil (RY04)
comes down or the relay drive
(Q24) is defective.

2. CN27 or RY04 is connected
wrongly.

The lamps are defective or the
housing assembly (CN13) is
defective.

- 62 -

FILE NO. SVM-06020

No. Procedure Check points Causes

5 Press [ ] button once

to start the unit.

• Shorten the time of the restart
delay timer.

• Set the operation mode to COOL.

• Set the fan speed level to AUTO.

• Set the preset temperature much

lower than the room temperature.
(The unit (compressor) operates
continuously in the above
condition.)

1. Check whether or not the
compressor operates.

2. Check whether or not the
OPERATION lamp blinks.

1. The temperature of the indoor
heat exchanger is extremely low.

2. The connection of the heat
exchanger sensor is loose.
(The connector is disconnected.)
(CN01)

3. The heat exchanger sensor and
the P.C. board are defective.
(Refer to Table 9-8-2.)

4. The main P.C. board is defective.

6 If the above condition (No. 6) still

continues, start the unit in the
following condition.

• Set the operation mode to HEAT.

• Set the preset temperature much

higher than room temperature.

7 Connect the motor connector to the

motor and turn on the power supply.
Start the unit in the following
condition.

• Set the operation mode to FAN.

• Set the fan speed level to HIGH.

(The unit (compressor) operates
continuously in the above codition.)

1. Check whether or not the
compressor operates.

2. Check whether or not the
OPERATION lamp blinks.

1. Check it is impossible to detect the
voltage (DC 12 V) between and1

3 of the motor terminals.

2. The motor does not operate.
(But it is possible to receive the
signal from the remote control.)

3. The motor rotates but vibrates
strongly.

1. The temperature of the indoor
heat exchanger is extremely high.

2. The connector of the heat
exchanger sensor short-circuited.
(CN01)

3. The heat exchanger sensor and
the P.C. board are defective. (Refer
to T ab le 9-8-2.)

4. The main P.C. board is defective.

1. The indoor fan motor is defective .
(Protected operation of P.C. board)

2. The connection of the motor
connector is loose.

3. The P.C. board is defective.

Table 9-8-2 Approximate resistance value of thermo sensor

Temperature 0°C10°C20°C25°C30°C

Resistance value 33.8 20.35 12.59 10.0 7.99

(kΩ)

9-8-2. How to Shorten Time of Restart Delay Timer

1 Press [CLR] button while pressing [CHK] button

with a tip of a pencil.

2 Then press [ ] button to transmit the

signal to the indoor unit.

9-8-3. How to use self cleaning function

The self cleaning function is set from a factory.
To cancel this function, should keep press the
temporary switch for 20 secounds till can hear
the long combination sound and repeat the

same procedure when need to set.

2

1

- 63 -

9-9. Troubleshooting for Remote Control

FILE NO. SVM-06020

Is receiver on

indoor unit exposed

to direct sunlight?

YES

NO

Is there any

thyristor fluorescent

light nearby?

YES

YES

NO NO

Press START/STOP

button.

Is transmission

mark indicated?

Does indoor unit

operate when

moving remote control

near receiver or

indoor unit?

YES

Batteries are

exhausted.

The unit does not beep at all.
OPERATION lamp on
indoor unit is not indicated.

NO

Press RESET button

on remote control

with tip of pencil.

Press START/STOP

button.

Avoid direct

sunlight.

Keep indoor unit

away from

thyristor

fluorescent light.

Does indoor unit

NO

start to operate by

automatic restart

function?

YES

Does radio sound

is affected by

remote control when

a signal is transmitted

at distance of 5 cm

from radio?

P.C. board is

defective.

Replace

P.C. board.

YES

NO

NO

Replace

batteries.

Note : After replacing batteries,

press the RESET button
with a tip of a pencil.

- 64 -

Is transmission mark

indicated?

YES

Does indoor unit

beep and operate?

YES

Normal

operation

NO

Remote control

is defective.

Replace

remote control.

FILE NO. SVM-06020

10. PART REPLACEMENT

10-1. Indoor Unit

No. Part name Procedures Remarks

1 Front panel

How to remove the front panel

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

its main power supply.

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

4 screws fixing the front panel.

3) Remove upper 3 hooks of the front panel from the

back body.

4) Open the horizontal grille right below by hand.

5) Pull the lower side of the front panel toward you

until it touches the horizontal grille to remove it.

(2)

(2)

4-screws

(2)

2 Electrical part

assembly

How to mount the front panel

1) Mount the front panel with the inverse procedure of

“How to remove the front panel”.

2) Push 3 places (right, left and center) of the air

outlet.

3) Check the gap between the front panel and the

back body.
If you operate the air conditioner in cooling or dry
operation without pushing the 3 places, the surface
of the front panel may be covered with frost and
have dewdrops.

1) Remove the front panel with the procedure 1.

2) Remove the screw fixing the electrical part box.

3) Remove the drain guide.

4) Remove the connector (

and the connector (6P) for the louver motor from
the microcomputer assembly.

5) Remove the screw for the earth, and pull the

electrical part base toward you to remove it from the
main unit.

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

3P x 2) for the fan motor

(3) Drain guide

(3)

(4)

(5) screws

(3P X 2)
6P

(2) screws

- 65 -

(6) TC sensor

When assembling the electrical parts
assembly, make the connecting cable
U-shaped and put it in the drain pan.

FILE NO. SVM-06020

No. Part name Procedures Remarks

3 Horizontal louver

4 Heat exchanger

1) Remove center 2 shafts of the horizontal grille from

the back body.

2) Remove left shaft of the horizontal

louver from the

back body.

3) Remove the horizontal

louver from the back body.

1) Remove the front panel, electrical parts assembly

and the horizontal louver with procedure 2 and 3.

2) Remove the screw on the rear side of the main unit
to remove the pipe holder.

3) Remove 2 screws fixing the heat exchanger and the
bearing base.

4) Remove 2 screws fixing the heat exchanger fixtures
(upper and lower) and the back body then pull out
the upper side of the heat exchanger slowly.

(1) Center shafts

(2) Left shafts

(3) 2 screws

(2) Screw

Bearing base

(3)

Pipe holder

(4) 2 screws

5 Cross flow fan

6 Bearing base

1) Remove the front panel, electrical parts assembly,
horizontal

louver and the heat exchanger with

procedure 4.

2) Loosen the set screw of the cross flow fan.

3) Remove 2 screws fixing the bearing base and the
back body.

4) Pull the cross flow fan toward you.

1) Remove the front panel, electrical parts assembly,
horizontal

louver, heat exchanger and the cross flow

fan with procedure 5.

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

(3) Screws

(2) Set screw

When assembling the cross flow fan, fix it
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.

Bearing base

Bearing

7 Fan motor

1) Remove the front panel, electrical parts assembly,
horizontal louver, and the heat exchanger with
procedure 4.

2) Loosen the set screw of the cross flow fan.

3) Remove 2 screws of the motor fixture.

4) Remove the lower side of the body (R) and move it
right to remove it.

5) Remove the motor from the motor fixture.

- 66 -

(3) 2 screws

(4) BODY (R)

(5)

Motor fixture

FILE NO. SVM-06020

10-2. Outdoor Unit (RAS-24GAH-ES2, RAS-24GA-ES2)

No. Part name Procedures Remarks

Top cabinet

1 Common

procedure

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

2) Remove the packed valve cover and the
electrical parts cover (2 screws ∅4 x 10L)

3) Remove 2 cord clamps (4 screws ∅4 x 16L) and
disconnect the power supply cord and connecting
cable after removing 6 screwson on the terminal
block and 1 ground screw on the electrical parts
base.

4) Remove the top cabinet. (7 screws ∅ 4 x 10L)
(Pulling out upward)

5) Remove the top cabinet. (2 screws ∅ 4 x 10L)
(Pull the front right portion toward you, and
remove it pulling out upward)

Front cabinet

2 screws

∅4 x 10L

Packed valve cover

2 Cord clamps

Side cabinet

4 screws ∅4 x 16L

7 screws ∅4 x 10L

Front

cabinet

- 67 -

FILE NO. SVM-06020

No.

2 Running

3 Running

4 Magnetic

5 Spark killer

Part name

capacitor
for compressor

capacitor
for fan motor

contactor

(Cooling only model)

Procedures

1) Perform the common procedure 1

2) Remove the capacitor band. (1 screw ∅4 x 10L)

3) Disconnect the lead wires from the capacitor
terminal.

1) Perform the common procedure 1

2) Remove the fixing screw. (1 screw ∅4 x 10L)

3) Disconnect the lead wires from the capacitor
terminal.

1) Perform the common procedure 1

2) Remove the fixing screw. (2 screws ∅4 x 16L)

3) Disconnect the lead wires from the terminal.

1) Perform the common procedure 1

2) Remove the fixing screw. (1 screws ∅4 x 10L)

3) Disconnect the lead wires from the terminal.

Remarks

Running capacitor
for compressor

Running capacitor
for fan motor

Cooling only model

Spark killer

Magnetic contactor

- 68 -

FILE NO. SVM-06020

10-3 Outdoor Unit (RAS-18GAH-ES2, RAS-18GA-ES2)

No. Part name Procedures Remarks

1 Common

procedure

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

2) Remove the packed valved cover and the electrical

Parts cover

(2 screws ∅ 4 x 10L)

3) Remove 2 cord clamps (4 screws ∅ 4 x 16L) and
disconnect the power supply cord and connecting
cable after removing 6 screws on the terminal block
and 1 ground screw on the electrical parts base.

4) Remove the upper cabinet. (4 scerws ∅ 4 x 10L)
(Pulling out upward)

5) Remove the front cabinet. (3 screws∅ 4 x 10L)
(Pull the front right protion toward you, and remove

it pulling out upward.)

Packed valve cover

2 screws ∅4 x 10L

Upper
cabinet

2 Cord clamps

4 screws ∅4 x 16L

Running

2

capacitor
for compressor

Running

3

capacitor

for fan motor

4

Magnetic contactor

Transformer

5

(Heat pump model)

P.C. Board

6

(Heat pump model)

7

Spark killer

(Cooling only model)

1) Perform the common procedure 1

2) Remove the capacitor band. (1 screw ∅4 x 10L)

3) Disconnect the lead wires from the capacitor
terminal.

1) Perform the common procedure 1

2) Remove the fixing screw. (1 screw ∅4 x 10L)

3) Disconnect the lead wires from the capacitor

terminal.

form the common procedure 1

1) Per

2) Remove the fixing screw. (2 screws ∅ 4 x 10L)

3) Disconnect the lead wires from the terminal.

1) Perform the common procedure 1

2) Remove the fixing screw. (2 screws ∅ 4 x 10L)

3) Disconnect the housing from the P.C. Board.

1) Perform the common procedure 1

2) Disconnect the lead wires from the P.C. Board.

3) Remove P.C.Board after unhooking 4 clams.

1) Perform the common procedure 1

2) Remove the fixing screw. (1 screw ∅ 4 x 10L)

3) Disconnect the lead wires from the terminal.

Running capacitor

for fan motor

Running
capacitor

for compressor

Running capacitor

Running capacitor
for compressor

Front

cabinet

Heat pump model

for fan motor

Cooling only model

P.C. Board

Transformer

Magnetic contactor

Spark killer

Magnetic contactor

- 69 -

11. EXPLODED VIEWS AND PARTS LIST

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

413

FILE NO. SVM-06020

411

407

Location Part Location Part

No. No. No. No.

402 43T60002 TERMINAL BLOCK; 3P 411 43T69527 PC BOARD (RAS-24GKHP)
403 43T50004 SENSOR; HEAT EXCHANGER 411 43T69528 PC BOARD (RAS-24GKP)
404 43T50314 SENSOR;THERMOSTAT 411 43T69529 PC BOARD (RAS-18GKHP)
405 43T69559 PC BOARD ASSY ; WRS-LED 411 43T69530 PC BOARD (RAS-18GKP)
407 43T62003 CORD CLAMP 413 43T63310 SENSOR HOLDER

Description Description

- 70 -

11-2. Indoor Unit

HP)

P)

FILE NO. SVM-06020

202

203

201

227

229

230

221

208

217

228

213

222

219

210

220

215

232214

218

216

211

209

231

226

224

212

223

207

234

204

236

235

233

Location Part Location Part

No. No. No. No.

201 43T00409 FRONT PANEL ASSY 219 43T49324 PLATE; EVA-SEAL
202 43T09386 GRILLE ASSY (18,24GKHP) 220 43T49039 HOLDER; PLATE EVA-SEAL
202 43T09388 GRILLE ASSY (18,24GKP) 221 43T49038 PLATE; EVA-SEAL
203 43T80306 AIR FILTER (L) 222 43T49037 HOLDER; PLATE EVA-SEAL
204 43T80312 AIR FILTER (R) 223 43T79007 GUIDE DRAIN
207 43T03010 BODY; RIGHT 224 43T39306 FIX FOR MOTOR
208 43T03011 BODY; LEFT 226 43T21370 MOTOR FAN
209 43T03012 HIDE; CLAW 227 43T20316 FAN; CROSS FLOW
210 43T09345 LOUVER-H 228 43T22309 ASM-M-BEARING
211 43T70309 HOSE ASSY; DRAIN 229 43T39015 BASE; BEARING
212 43T21373 STEPPING MOTOR 230 43T03344 BACK BODY ASSY
213 43T44376 REFRIGERATION ASSEMBLY 231 43T07022 HOLDER; PIPE
214 43T47349 PIPE; DELIVERY 232 43T82306 INSTALLATION PLATE
215 43T47350 PIPE; SUCTION 234 43T69421 WIRELESS-REMOCO (RAS-18,24GK
216 43T49021 PIPE; SHIELD 234 43T69422 WIRELESS-REMOCO (RAS-18,24GK
217 43T19322 FIX-P-SENSOR 235 43T83003 HOLDER; REMOTE CONTROLLER
218 43T49325 SPRING 236 43T62029 COVER; TERMINAL

Description Description

- 71 -

11-3. Outdoor Unit (RAS-24GAH-ES2)

FILE NO. SVM-06020

Location Part Location Part

No. No. No. No.

1 43T42324 BASE PLATE ASSEMBLY 24 43T19330 PACKED VALVE COVER
2 43T41397 COMPRESSOR;PA290X3CS-4MU 25 43T00455 UPPER CABINET
3 43T49011 SPRING BASE(UPPER) 26 43T96305 BUSHING
4 43T49012 SPRING BASE (LOWER) 27 43T62325 ELECTRIC PART COVER
5 43T49019 SPRING; BUFFER 28 43T61306 ELECTRIC PARTS BASE
6 43T97307 COMPRESSOR BOLT (M6) 29 43T52301 SWITCH;MAGNET; CLK-35J
7 43T43391 CONDENSER ASSEMBLY 30 43T55340 MF CAPACITOR
8 43T00448 FIXING PLATE VALVE 31 43T55341 CAPACITOR;PLASTIC-FILM

9 43T46332 VALVE;PACKED 6.35 DIA 32 43T60352 TERMINAL BLOCK; 6P
10 43T46335 VALVE;PACKED 12.7 DIA (H4) 35 43T19331 FIN GUARD
11 43T47331 BONNET, 6.35 DIA 36 43T00456 UPPER FRONT CABINET; A
12 43T47333 BONNET, 12.70 DIA 37 43T00457 UPPER FRONT CABINET; B
13 43T47013 CAPILLARY TUBE; 2.0 DIA 38 43T 71301 HANDLE
14 43T00468 FRONT CABINET 39 43T46337 4 WAY VALVE
15 43T00474 LEFT CABINET 40 43T46339 COIL;V-4WAY;AC220-240V 50Hz
16 43T00454 RIGHT CABINET 41 43T69059 SENSOR; TE
17 43T21378 FAN MOTOR;AC220-240V 50Hz 42 43T69060 SENSOR; TD
18 43T20319 PROPELLER FAN 43 43T79305 DRAIN NIPPLE
19 43T47001 NUT FLANGE 44 43T58301 TRANSFORMER; TT-05
20 43T19329 FAN GUARD 45 43T69580 PC BOARD
21 43T04302 PARTITION 46 43T60325 FILTER;CLAMP
22 43
23 43T39318 MOTOR BASE

T39317 MOTOR BASE CONNECTION PLATE 47 43T47308 CAPILLARY TUBE; 1.0 DIA

Description Description

- 72 -

11-4. Outdoor Unit (RAS-18GAH-ES2)

FILE NO. SVM-06020

Location Part Location Part

No. No. No. No.

1 43T42324 BASE PLATE ASSEMBLY 22 43T39317 MOTOR BASE CONNECTION PLATE
2 43T41396 COMPRESSOR;PA225X2C-4KU1 23 43T39318 MOTOR BASE
3 43T49011 SPRING BASE(UPPER) 24 43T19330 PACKED VALVE COVER
4 43T49012 SPRING BASE (LOWER) 25 43T00460 UPPER CABINER ASSEMBLY
5 43T49019 SPRING; BUFFER 26 43T96305 BUSHING
6 43T97307 COMPRESSOR BOLT (M6) 27 43T62325 ELECTRIC PART COVER
7 43T43392 CONDENSER ASSEMBLY 28 43T61307 ELECTRIC PARTS BASE
8 43T00448 FIXING PLATE VALVE 29 43T52302 MAGNETIC CONTACTOR; AC220-240V 50Hz

9 43T46332 VALVE;PACKED 6.35 DIA 30 43T55340 MF CAPACITOR
10 43T46335 VALVE;PACKED 12.7 DIA (H4) 31 43T55341 CAPACITOR;PLASTIC-FILM
11 43T47331 BONNET, 6.35 DIA 32 43T60352 TERMINAL BLOCK; 6P
12 43T47333 BONNET, 12.70 DIA 34 43T61305 MAGNETIC RELAY BASE
13 43T47013 CAPILLARY TUBE; 2.0 DIA 35 43T19331 FIN GUARD
14 43T00468 FRONT CABINET 39 43T46337 4 WAY VALVE
15 43T00473 LEFT CABINET 40 43T46339 COIL;V-4WAY;AC220-240V 50Hz
16 43T00451 RIGHT CABINET ASSEMBLY 41 43T69059 SENSOR; TE
17 43T21378 FAN MOTOR;AC220-240V 50Hz 42 43T69060 SENSOR; TD
18 43T20319 PROPELLER FAN 43 43T79305 DRAIN NIPPLE
19 43T47001 NUT FLANGE 44 43T58301 TRANSFORMER; TT-05
20 43T19329 FAN GUARD 45 43T 69580 PC BOARD
21 43T04301 PARTITION 46 43T60325 FILTER;CLAMP

Description Description

- 73 -

FILE NO. SVM-06020

11-5.

Outdoor Unit (RAS-24GA-ES2)

Location Part Location Part

No. No. No. No.

1 43T42324 BASE PLATE ASSEMBLY 20 43T19329 FAN GUARD

2 43T41397 COMPRESSOR;PA290X3CS-4MU 21 43T04302 PARTITION

3 43T49011 SPRING BASE(UPPER) 22 43T39317 MOTOR BASE CONNECTION PLATE

4 43T49012 SPRING BASE (LOWER) 23 43T39318 MOTOR BASE

5 43T49019 SPRING; BUFFER 24 43T19330 PACKED VALVE COVER

6 43T97307 COMPRESSOR BOLT (M6) 25 43T00455 UPPER CABINET

7 43T43390 CONDENSER ASSEMBLY 26 43T96305 BUSHING

8 43T00448 FIXING PLATE VALVE 27 43T62325 ELECTRIC PART COVER

9 43T46332 VALVE;PACKED 6.35 DIA 28 43T61306 ELECTRIC PARTS BASE

10 43T46335 VALVE;PACKED 12.7 DIA (H4) 29 43T52301 SWITCH;MAGNET; CLK-35J
11 43T47331 BONNET, 6.35 DIA 30 43T55340 MF CAPACITOR
12 43T47333 BONNET, 12.70 DIA 31 43T55341 CAPACITOR;PLASTIC-FILM
13 43T47013 CAPILLARY TUBE; 2.0 DIA 32 43T60352 TERMINAL BLOCK; 6P
14 43T00468 FRONT CABINET 33 43T33002 SPARK-KILLER
15 43T00474 LEFT CABINET 35 43T19331 FIN GUARD
16 43T00454 RIGHT CABINET 36 43T00456 UPPER FRONT CABINET; A
17 43T21377 FAN MOTOR;AC220-240V 50Hz 37 43T00457 UPPER FRONT CABINET; B
18 43T20319 PROPELLER FAN 38 43T71301 HANDLE
19 43T47001 NUT FLANGE

Description Description

- 74 -

11-6. Outdoor Unit (RAS-18GA-ES2)

FILE NO. SVM-06020

Location Part Location Part

No. No. No. No.

1 43T42324 BASE PLATE ASSEMBLY 19 43T47001 NUT FLANGE
2 43T41396 COMPRESSOR;PA225X2C-4KU1 20 43T19329 FAN GUARD
3 43T49011 SPRING BASE(UPPER) 21 43T04301 PARTITION
4 43T49012 SPRING BASE (LOWER) 22 43T39317 MOTOR BASE CONNECTION PLATE
5 43T49019 SPRING; BUFFER 23 43T39318 MOTOR BASE
6 43T97307 COMPRESSOR BOLT (M6) 24 43T19330 PACKED VALVE COVER
7 43T43389 CONDENSER ASSEMBLY 25 43T00460 UPPER CABINER ASSEMBLY
8 43T00448 FIXING PLATE VALVE 26 43T96305 BUSHING

9 43T46332 VALVE;PACKED 6.35 DIA 27 43T62325 ELECTRIC PART COVER
10 43T46335 VALVE;PACKED 12.7 DIA (H4) 28 43T61304 ELECTRIC PART BASE
11 43T47331 BONNET, 6.35 DIA 29 43T52302 MAGNETIC CONTACTOR; AC220-240V 50Hz
12 43T47333 BONNET, 12.70 DIA 30 43T55340 MF CAPACITOR
13 43T47014 CAPILLARY TUBE; 1.7DIA 31 43T55324 CAPACITOR; PLASTIC-FILM
14 43T00468 FRONT CABINET 32 43T60352 TERMINAL BLOCK; 6P
15 43T00459 LEFT CABINET 33 43T33002 SPARK-KILLER
16 43T00451 RIGHT CABINET ASSEMBLY 34 43T61305 MAGNETIC RELAY BASE
17 43T21345 FAN-MOTOR(Made in China) 35 43T19331 FIN GUARD
18 43T20319 PROPELLER FAN

Description Description

- 75 -

FILE NO. SVM-03009(1)

TOSHIBA CARRIER (THAILAND) CO.,LTD.

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

AMPHUR MUANG, PATHUMTHANI 12000,THAILAND.

– 75 –