Toshiba RAS-18UFHP-ES3, RAS-18UFP-ES3 SERVICE MANUAL

FILE NO. SVM-04031-(1)

AIR-CONDITIONER

UNDER CEILING / CONSOLE TYPE

RAS-18UFHP-ES3 / RAS-18UAH-ES3

RAS-18UFP-ES3 / RAS-18UA-ES3

RAS-24UFHP-ES3 / RAS-24UAH-ES3

RAS-24UFP-ES3 / RAS-24UA-ES3

18 Class

24 Class

June 2004

CONTENTS

1. SPECIFICATIONS

2. CONSTRUCTION VIEWS

2-1 Indoor Unit
2-2 Outdoor Unit (RAS-18UAH-ES3)

2-3 Outdoor Unit (RAS-18UA-ES3)
2-4 Outdoor Unit (RAS-24UAH-ES3, RAS-24UA-ES3)

3. WIRING DIAGRAM

3-1 RAS-18UFHP-ES3 / RAS-18UAH-ES3
3-2 RAS-18UFP-ES3 / RAS-18UA-ES3
3-3 RAS-24UFHP-ES3 / RAS-24UAH-ES3
3-4 RAS-24UFP-ES3 / RAS-24UA-ES3

4. SPECIFICATION OF ELECTRICAL PARTS

4-1 Indoor Unit
4-2 Outdoor Unit (RAS-18UAH-ES3)
4-3 Outdoor Unit (RAS-18UA-ES3)
4-4 Outdoor Unit (RAS-24UAH-ES3)
4-5 Outdoor Unit (RAS-24UA-ES3)

5. REFRIGERATION CYCLE DIAGRAM

5-1 RAS-18UFHP-ES3 / RAS-18UAH-ES3
5-2 RAS-18UFP-ES3 / RAS-18UA-ES3
5-3 RAS-24UFHP-ES3 / RAS-24UAH-ES3
5-4 RAS-24UFP-ES3 / RAS-24UA-ES3

6. CONTROL BLOCK DIAGRAM

6-1 RAS-18UFHP-ES3, RAS-24UFHP-ES3
6-2 RAS-18UFP-ES3, RAS-24UFP-ES3

7. OPERATION DESCRIPTION

7-1 Outline of Air Conditioner Control
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 Auto Restart Function
7-8 Filter Check Lamp

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 How to Use Drain Pump Kit of Option
8-8 Others

FILE NO. SVM-04031-(1)

– 1 –

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 Parts
9-6 Troubleshooting for Indoor Unit
9-7 Troubleshooting for Wiring (Interconnect Cable and Serial Signal Wire)
9-8 Troubleshooting for P.C. Board
9-9 Troubleshooting for Remote Control

10. PARTS REPLACEMENT

10-1 Indoor Unit
10-2 Outdoor Unit (RAS-18UAH-ES3, RAS-18UA-ES3)
10-3 Outdoor Unit (RAS-24UAH-ES3, RAS-24UA-ES3)

11. EXPLODED VIEWS AND PARTS LIST

11-1 Indoor Unit (E-Parts Assy)
11-2 Indoor Unit
11-3 Outdoor Unit (RAS-18UAH-ES3)
11-4 Outdoor Unit (RAS-18UA-ES3)
11-5 Outdoor Unit (RAS-24UAH-ES3)
11-6 Outdoor Unit (RAS-24UA-ES3)

FILE NO. SVM-04031

• This air conditioner is charged with HFC (R-410A)
that does not deplete the Ozone layer.

• This air conditioner requires special service tools
for the refrigerant R-410A.

– 2 –

1. SPECIFICATIONS

FILE NO. SVM-04031

MODEL

ITEM

Capacity 220V 240V 220V 240V 220V 240V 220V 240V 220V 240V 220V 240V

kW 5.00 5.10 5.70 5.75 5.30 5.35 6.20 6.30 7.00 7.10 6.80 6.85

Phase 1∅

Power source V 220 − 240

Hz 50

Power consumption W 1960 2010 1830 1880 1950 2040 2515 2570 2430 2530 2640 2790

Power factor % 98 96 98 96 97 92 96 92 96 91 95 91

Running current

Starting current A 47 54

Moisture removal lit/h 2.0 2.5 2.7

Noise

Refrigerant

Refrigerant control Capillary tube

Interconnection Connection type Flare connection

pipe Maximum length

INDOOR UNIT RAS-18UFHP-ES3 RAS-18UFP-ES3 RAS-24UFHP-ES3 RAS-24UFP-ES3

Dimensions Height mm 633

Net weight kg 23

Evaporator type Finned tube

Indoor fan type Multi blade fan

Air volume Medium fan m3/h 680 700 680 750 760 750

Fan motor output W 50

Air filter Washable -filter

OUTDOOR UNIT RAS-18UAH-ES3 RAS-18UA-ES3 RAS-24UAH-ES3 RAS-24UA-ES3

Dimensions Height mm 538 690

Net weight kg 50 41 67 63

Condenser type Finned tube

Outdoor fan type Propeller fan

Airflow volume m3/h 2105 2310 2150 2310 1830 2010 3380 3560 3380 3560 3380 3560

Fan motor output W 42 65

Compressor

Safety device IOL, Td Sensor

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

Indoor A 0.4 0.45

Outdoor A 8.60 8.30 7.70 7.60 8.60 8.80 11.35 11.20 11.10 11.15 12.15 12.35

Indoor (H/M/L) db 43/39/36 46/42/37

Outdoor db 51 52 52 53 51 52 56 57 57 58 56 57

Name of refrigerant R-410A

Rated amount kg 1.3 1.14 1.6

Gas side size

Connection type Flare connection

Liquid side size

(One way) 20*

Maximum height

difference

Width mm 1093

Depth mm 208

High fan m3/h 800 830 800 900 930 900

Low fan m3/h 580 650 580 550 660 650

Width mm 830 880

Depth mm 300 310

Model PA225X3F-4L PA290X3F-4MS

Output W 1500 2200

mm

mm

m

m8 10

RAS-18UFHP-ES3 RAS-18UFP-ES3 RAS-24UFHP-ES3 RAS-24UFP-ES3

RAS-18UAH-ES3 RAS-18UA-ES3 RAS-24UAH-ES3 RAS-24UA-ES3

Cooling Heating Cooling Cooling Heating Cooling

33

12.70

6.35

1

15*

2

5KS225DAA 5JS315DAG01

IOL

IOL, Td Sensor

25*

2

IOL

– 3 –

Note : 1

• Capacity is based on the following temperature conditions.

FILE NO. SVM-04031

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

refrigerant

*2 Need to charge

refrigerant

RAS-18UFHP-ES3 / RAS-18UAH-ES3 RAS-24UFHP-ES3 / RAS-24UAH-ES3

RAS-18UFP-ES3 / RAS-18UA-ES3 RAS-24UFP-ES3 / RAS-24UA-ES3

15m or less 15m or less

Over 15m up to 20m (20g/m) Over 15m up to 25m (30g/m)

JIS C9612-1994

Cooling Heating

(DB) 27°C 20°C

(WB) 19°C 12°C

(DB) 35°C 7°C

(WB) 24°C 6°C

– 4 –

2-1. Indoor Unit

FILE NO. SVM-04031

2. CONSTRUCTION VIEWS

Front panel

1093

UNDER CEILING & CONSOLE INSTALLATION

208

633

Knock out system

Grille air inlet

Back Body

For stud bolt
(∅8 - ∅10)

For stud bolt (∅6)

200 Min

330165

∅74

1093
1015

742
450

20 20

– 5 –

Installation plate

Mount plate

M10 Suspention bolt

633

460

70 Min

Wireless remote control

Knock out system

160

57 18

2-2. Outdoor Unit (RAS-18UAH-ES3)

10

-∅

8

11x14

∅

∅

anchor bolt

for

4x

600 or more

600

600 or

Air inlet

more

Liquid side

Electric

Parts cover

6.35)

∅

(Flare

12.7)

∅

Gas side

(Flare

FILE NO. SVM-04031-(1)

Installation dimension

120

Air inlet

325

100 or more

Air

outlet

100 or more

6 holes

-∅

8

10 anchor bolt)

— ∅

8

11x14 holes

∅

∅

(for fixing outdoor unit)

or

6-

25 Drain outlet

∅

Service Port

54

344

9

1

60

50

90

600

830

A

R10

600

50

35

Detail Drawing

A

52

325

23

6 hole

∅

11x14 hole

∅

Fan guard

Handle

420

∅

90

538

300

– 6 –

2-3. Outdoor Unit (RAS-18UA-ES3)

10

-∅

8

11x14

∅

∅

or

anchor bolt

4x

600 or more

FILE NO. SVM-04031-(1)

600 or

325

more

100 or more

600

Air inlet

Installation dimension

Air inlet

100 or more

Air

outlet

Electric parts cover

6 hole

-∅

(for fixing outdoor unit)

8

6.35)

∅

Gas side

Liquid side

(Flare

27

12.7)

∅

(Flare

Service

Port

130

100

344

65.5

9090

120

A

600

Detail Drawing

A

50

R10

35

52.5
325

23

∅6 hole

301

325

11x14 hole

∅

4-∅11x14 hole

(for Ø8-Ø10 anchor bolt)

25Drain outlet

∅

420

∅

Fan guard

538

Handle

600

300

780

– 7 –

2-4. Outdoor Unit (RAS-24UAH-ES3, RAS-24UA-ES3)

10

∅

8

12X18

∅

600

600 or

more

-∅

for

4

600 or

more

anchor bolt

Electric

Parts cover

Liquid side

6.35)

∅

(Flare

Gas side

2.7)

∅1

(Flare

FILE NO. SVM-04031-(1)

Service Port

1212

more

52

Air inlet

340

68

Installation dimension

100 or

25 Drain outlet

∅

120

Air outlet

100 or

more

140

600

310

23

Handle

340 (pitch)

88

74

880

364

A

600

Detail Drawing

A

50

63.8
340

27

12x18 hole

∅

340

690

Handle

– 8 –

3. WIRING DIAGRAM

3-1. RAS-18UFHP-ES3 / RAS-18UAH-ES3

FILE NO. SVM-04031-(1)

COLOR IDENTIFICA TION
BR W : BROWN
RED : RED
WHI : WHITE
YEL : YELLOW
BLU : BLUE
BLK : BLACK
GR Y : GRA Y
PNK : PINK
ORN : ORANGE
GRN&YEL : GREEN&

GRN : GREEN
PUR : PURPLE

YELLOW

BLK
WHI
RED

GRN&YEL

CN30

CN31

BLK

CN23

P04

SG01

R22

FUSE

F01

250V AC

T6.3A

J401

2

1 1 1232 3

FOR FLOA T SWITCH

(OPTION)

When you use float

switch you should

cut J401

LOUVER
MOT OR

R09 R507

R21

CN402 CN401 CN11

IC04

C15

R Y401

R405

CR401

FOR DRAIN PUMP

(OPTION)

CN07

ORN

RED
PNK
YEL
BR W
BLU

L01

123

654
654

C501

321
321

MAIN PCB
MCC-865A

R Y501

5 3
5 311

BR W
GR Y

YEL

CN25

CN13

R01

C01

CR502

CR501

CN10 BLK

WHI

1 1

RED

3 3

BLK

6 6

3 3
2 2
1 1

INFRARED RA YS RECEIVE
AND INDICA TION P AR TS

123

456

BLU

DB01

BLU

DC12V

DC5V

IC03

WHI
RED

456

BLU

456
456

C02

PUR

GR Y

BLU

BLU

789
7891010

BLU

BLU

789
7891010

BLU

123

BLU

123
123

R506

BLU

POWER SUPPLY

WHI

CIRCUIT

CN100

CN03

1 1
2 2

CN01

1 1
2 2

WHI

11

GRY

22

GRY

33

BLK
BLK

BLK
BLK

FAN
MOTOR

CN101

THERMO
SENSOR
(TA)

HEAT
EXCHANGER
SENSOR
(TC)

1
2
3

MCC-865B

SWITCH

PCB

OUTDOOR
TERMINAL
BLOCK

C

SR

COMPRESSOR TERMINAL

INDOOR
TERMINAL
BLOCK

POWER SUPPLY
220-240 V~ 50 Hz

L

N

FERRITE CORE

i

2

1

2

1

BLK

BLK

RED

RED

MAGNETIC

CONTACTOR

R

GRN&YEL

S

T

A1

52C

U

V

CAPACITOR CAPACITOR

RED

S

WHI
PNK

C

R

COMPRESSOR

A2

W

BLK

RED

WHI
RE

3

3

CHASSIS

D

FAN MOTOR

INDOOR
UNIT

OUTDOOR
UNIT

GRN&YEL

BLK

TRANSFORMER

COIL FOR
4 WAY VALVE

BLK

BLK

RED

RED

BLK

BLK

WHI

RED

GRY

BLU

YEL

BLU

BLU

1

3

1

3

1

3

5

7

9

131

11

33

MAIN P.C. BOARD (MCC-890)

1
2

CN06

3

1

CN05

3

1

3

5

CN01

7

9

CN11

3

SG01

F01

250VAC T6. 3A

CR11

TNR
R74

CN02

CR12

CR13

BLK

1
1

CN03

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 −

3-2. RAS-24UFHP-ES3 / RAS-24UAH-ES3

FILE NO. SVM-04031-(1)

COLOR IDENTIFICA TION
BR W : BROWN
RED : RED
WHI : WHITE
YEL : YELLOW
BLU : BLUE
BLK : BLACK
GR Y : GRA Y
PNK : PINK
ORN : ORANGE
GRN&YEL : GREEN&

GRN : GREEN
PUR : PURPLE

YELLOW

BLK
WHI
RED

GRN&YEL

CN30

CN31

BLK

CN23

P04

SG01

R22

F01

FUSE

T6.3A

250V AC

J401

2

1 1 1232 3

FOR FLOA T SWITCH

(OPTION)

When you use float

switch you should

cut J401

LOUVER
MOT OR

R09 R507

R21

CN402 CN401 CN11

IC04

C15

R Y401

R405

CR401

FOR DRAIN PUMP

(OPTION)

CN07

L01

123

ORN

RED
PNK
YEL
BR W
BLU

654
654

C501

321
321

MAIN PCB
MCC-865A

R Y501

5 3
5 311

BR W
GR Y

YEL

CN25

CN13

R01

C01

CR502

CR501

CN10 BLK

WHI

1 1

RED

3 3

BLK

6 6

3 3
2 2
1 1

INFRARED RA YS RECEIVE
AND INDICA TION P AR TS

123

456

BLU

DB01

BLU

DC12V

DC5V

IC03

WHI
RED

456

BLU

456
456

C02

PUR

GR Y

BLU

BLU

789
7891010

BLU

BLU

789
7891010

BLU

123

BLU

123
123

R506

BLU

POWER SUPPLY

WHI

CIRCUIT

CN100

CN03

1 1
2 2

CN01

1 1
2 2

WHI

11

GR Y

22

GR Y

33

BLK
BLK

BLK
BLK

FAN
MOTOR

CN101

1
2
3

THERMO
SENSOR
(TA)

HEAT
EXCHANGER
SENSOR
(TC)

SWITCH

PCB

MCC-865B

OUTDOOR
TERMINAL
BLOCK

C

SR

COMPRESSOR TERMINAL

POWER SUPPLY
220-240 V~ 50 Hz

L

BLK

RED

BLK

(1/L1)

(2/T1)

CAPACITOR

RED

WHI
PNK

COMPRESSOR

INDOOR
TERMINAL
BLOCK

i

N

FERRITE CORE

RED

MAGNETIC

CONTACTOR

R

S

(3/L2)

(4/T2)

U

V

S

C

R

BLK

1

1

GRN&YEL

T

(5/L3)

(6/T3)

W

A1

52C

A2

2

3

2

3

CHASSIS

INDOOR
UNIT

OUTDOOR
UNIT

GRN&YEL

TRANSFORMER

BLK

BLK

RED

RED

BLK

BLK

WHI

RED

GRY

1

3

1

3

1

3

5

7

9

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

TNR
R73

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)

RY07

BLU

131

CN11

3

RED

WHI
RE

CAPACITOR

D

BLK

YEL

BLU

BLU
COIL FOR
4 WAY VALVE

11

33

CN02

CR11

CR12

CR13

BLK

1
1

CN03

RY05

RY06

3

FAN MOTOR

− 10 −

3-3. RAS-18UFP-ES3 / RAS-18UA-ES3

FILE NO. SVM-04031

CO LO R IDE NT IF IC ATIO N
BR W : B R OW N
R ED : R E D
WH I : WHI TE
YE L : YE LL OW
BL U : B LUE
BL K : B LA CK
GR Y : GR AY
PN K : PIN K
OR N : OR AN GE
GR N &YE L : GR E E N&

GR N : GR E E N
PU R : PU R PL E

YE L LOW

BL K
WH I
R ED

GR N &YE L

BL K

CN 30

CN 31

P0 4

CN 27

11

33

S G01

R 22

F0 1

FU S E

T6 .3A

250V AC

J4 01

21 1 1232

CN 402 C N401 CN 11

FO R F LOAT S WI TC H

(OP T ION )

Whe n you us e float

switch you s hould

cut J 401

R 09 R5 07

R 21

CR 0 2

R Y0 4

LO UV ER
MOT OR

FO R DR AI N P UMP

IC 04

R Y40 1

R 405

CR 4 01

(OP T ION )

C1 5

OR N

R ED
PN K
YE L
BR W
BL U

654

L01

123

654

C5 01

321
321

MAI N P CB
MC C- 865A

R Y50 1

5 3
5 311

BR W
GR Y

YE L

BL K

CN 07

3

INF R AR E D R AY S R EC E IV E
AND IND IC ATIO N PA R TS

123

CN 25

123

BL U

BL U

123

CN 13

123

R 01

DB 01

C0 1

CR 5 02

DC 12V

DC 5V

CR 5 01

CN 10 BL K

WH I

R ED

IC 03

R 506

1 1

3 3

6 6

3 3
2 2
1 1

BL U

WH I
R ED

C0 2

PU R

456
456

BL U

456
456

BL U

GR Y

BL U

789
7891010

BL U

BL U

789
7891010

BL U

BL U

WH I

CN 100

CN 101

S WIT CH

WH I

11

1

PC B

GR Y

22

2

GR Y

33

3

MC C-8 65B

P OWE R S U PP LY

C IR CU IT

CN 03

1 1
2 2

CN 01

1 1
2 2

BL K
BL K

BL K
BL K

FA N
MOT OR

TH ER M O
S EN S OR
(TA)

HE AT
E XC HAN GE R
S EN S OR
(T C)

OUTDOOR
TERMINAL
BLOCK

RED

WHI
PNK

POWER SUPPLY
220 − 240 V ~ 50 Hz

BLK

MAGNETIC

CONTACTOR

CAPACITOR

S

R

COMPRESSOR

INDOOR
TERMINAL
BLOCK

L

N

BLK

RED

GRN&YEL

RED

2

1

1

RED

3

2

3

BLK

BLK

GRN&YEL

CHASSIS

INDOOR
UNIT

OUTDOOR
UNIT

SPARK KILLER

GRY

R

U

T

S

V

(or A)

A1

(or B)

A2

W

CAPACITOR

RED

C

BLK

WHI

RED

BLK

FAN MOTOR

C

R

S

COMPRESSOR TERMINAL

− 11 −

3-4. RAS-24UFP-ES3 / RAS-24UA-ES3

FILE NO. SVM-04031

COLOR IDENTIFICA TION
BR W : BROWN
RED : RED
WHI : WHITE
YEL : YELLOW
BLU : BLUE
BLK : BLACK
GR Y : GRA Y
PNK : PINK
ORN : ORANGE
GRN&YEL : GREEN&

GRN : GREEN
PUR : PURPLE

YELLOW

BLK
WHI
RED

GRN&YEL

BLK

CN30

CN31

CN27

P04

11

33

SG01

R22

F01

FUSE

T6.3A

250V AC

J401

21 1 1232

CN402 CN401 CN11

FOR FLOA T SWITCH

(OPTION)

When you use float

switch you should

cut J401

R09 R507

R21

CR02

R Y04

LOUVER
MOT OR

FOR DRAIN PUMP

IC04

R Y401

R405

CR401

(OPTION)

ORN

RED
PNK
YEL
BR W
BLU

654

L01

123

654

C501

321
321

MAIN PCB
MCC-865A

R Y501

5 3
5 311

BR W
GR Y

YEL

BLK

CN07

C15

3

INFRARED RA YS RECEIVE
AND INDICA TION P AR TS

123

CN25

123

BLU

BLU

123

CN13

123

R01

DB01

C01

CR502

CR501

R506

CN10 BLK

WHI

1 1

RED

3 3

6 6

3 3
2 2
1 1

BLU

DC12V

DC5V

IC03

WHI
RED

456
456

BLU

456
456

C02

PUR

GR Y

789

10

789

10

BLU

BLU

BLU

BLU

BLU

WHI

789

10
10

789

CN100

CN101

SWITCH

WHI

11

1

PCB

GR Y

22

2

GR Y

33

3

MCC-865B

POWER SUPPL Y

CIRCUIT

BLU

CN03

1 1
2 2

CN01

1 1
2 2

BLK
BLK

BLK
BLK

FA N
MOT OR

THERMO
SENSOR
(TA)

HEA T
EXCHANGER
SENSOR
(TC)

OUTDOOR
TERMINAL
BLOCK

INDOOR
TERMINAL
BLOCK

POWER SUPPLY
220 − 240 V ~ 50 Hz

L

N

BLK

BLK

RED

RED

MAGNETIC CONTACTOR

RED

BLK BLK

SPARK KILLER

A1 A2

52C

R U

SV

TW

1

1

2

2

GRN&YEL

RED

CAPACITOR

3

3

GRY

CHASSIS

RED

RED

CAPACITOR

S

WHI
PNK

R

COMPRESSOR

INDOOR
UNIT

OUTDOOR
UNIT

WHI
RED

C

FAN MOTOR

BLK

COMPRESSOR TERMINAL

BLK

C

SR

− 12 −

FILE NO. SVM-04031

4. SPECIFICATION OF ELECTRICAL PARTS

4-1. Indoor Unit

No. Parts name Type Specifications

1 Fan motor (for indoor) AFP-220-50-4A Output (Rated) 50W, 220-240V
2 Thermo sensor (TA-sensor) ——— 10kΩ at 25°C
3 DC-DC transformer (T01) SWT-47 DC 390V, Secondary DC 12V, 7V
4 Microcomputer TMP87CM40AN

Heat exchanger sensor

5

(TC-sensor)
6 Line filter (L01) SS11V-R07190 19mH, AC0.7A
7 Diode (DB01) D3SBA60 4A, 600V
8 Capacitor (C02) KMH400VSSN47M22S 47µF, 400V
9 Fuse (F01) TSCR T6.3A, 250V

10 Varistor (R21, R22) 15G561K 560V
11 Resistor (R01) RF-2TK5R6 5.6Ω, 2W

12 Louver motor MP35EA12

——— 10kΩ at 25°C

Output (Rated) 2W, 6poles, 4phase,
DC 12V

4-2. Outdoor Unit (RAS-18UAH-ES3)

No. Parts name Type Specifications

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

1 Compressor PA225X3F-4L Winding resistance (Ω) Red-Black White-Black

(at 20°C) 1.35 2.68
Output (Rated) 65W, 6poles, 1phase, 220 – 240V, 50Hz

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

(at 20°C) 176.2 290.5

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

451205KQ AC 450V, 2µF

371456JCR AC 370V, 45µF

VHV (STF) AC 220 – 240V

10 Varistor (R73, 74) 15G471K 470V
11 Fuse (F01) TSCR T6.3A, 250V

– 13 –

FILE NO. SVM-04031-(1)

4-3. Outdoor Unit (RAS-18UA-ES3)

No. Parts name Type Specifications

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

1 Compressor 5KS225DAA Winding resistance (Ω) Red-Black White-Black

(at 20°C) 1.632 2.457
Output (Rated) 42W, 6poles, 1phase, 220 – 240V, 50Hz

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

(at 20°C) 176.2 290.5

Running capacitor
3

(for fan motor)

Running capacitor
4

(for compressor)
5 Magnetic contactor CLK-26J 220 – 240V, 50Hz

4-4. Outdoor Unit (RAS-24UAH-ES3)

451205KQ AC 450V, 2µF

371456JCR AC 370V, 45µF

No. Parts name Type Specifications

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

1 Compressor PA290X3F-4MS Winding resistance (Ω) Red-Black White-Black

(at 20°C) 1.07 2.20
Output (Rated) 65W, 6poles, 1phase, 220 – 240V, 50Hz

2 Fan motor (for outdoor) KPG6-71SB5P-T1 Winding resistance (Ω) Red-Black White-Black

(at 20°C) 64.4 127.4

Running capacitor
3

(for fan motor)

Running capacitor
4

(for compressor)
5 Solenoid coil

(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 Microcomputer TMP47C840N

10 Varistor (R73, 74, 86) 15G471K 470V
11 Fuse (F01) TSCR T 6.3A, 250V

451355KQ AC 450V, 3.5µF

371456JCR AC 370V, 45µF

VHV (STF) AC 220 – 240V

– 14 –

FILE NO. SVM-04031-(1)

4-5. Outdoor Unit (RAS-24UA-ES3)

No. Parts name Type Specifications

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

1 Compressor 5JS315DAB Winding resistance (Ω  ) Red-Black White-Black

(at 20°C) 0.83 2.257
Output (Rated) 65W, 6poles, 1 phase, 220 − 240V, 50Hz

2 Fan motor (for outdoor) KFG6-71SB5P-T Winding resistance (Ω) Red-Black White-Black

(at 20° C) 64.4 127.4

Running capacitor
3

(for fan motor)

Running capacitor
4

(for compressor)

5 Magnetic contactor

451355KQ AC 450V, 3.5µ F

371456JCR AC 370V, 45µ F

CLK-35J

220 − 240V, 50Hz

– – 15 –

5. REFRIGERATION CYCLE DIAGRAM

5-1. RAS-18UFHP-ES3 / RAS-18UAH-ES3

FILE NO. SVM-04031

0.39m

(Connecting pipe)

∅12.70 mm

0.39m
(Flexible pipe)

∅12.70 mm

O.D.:12.70 mm

Cooling

Heating

Cooling

Heating

Packed valve

Heating

4-way valve

Cooling

P

(∅12.70)

Muffler

Compressor

PA225X3F-4L

Accumulator

Indoor unit

Evaporator

Multi blade fan

T

0.49m
(Connecting pipe)

∅6.35 mm

O.D.:6.35 mm

Packed valve

(∅6.35)

Capillary tube

∅1.0x1500S

Capillary tube

∅1.7x700S

Condenser

Refrigerant
R-410A 1.30 Kg

Fan speed

(indoor)

Ambient temp.

conditions DB/WB

(°C)

Indoor Outdoor

50Hz

Cooling
Heating

Propeller fan
Outdoor unit

Standard

pressure P

(MPaG)

Mark ( ) means check points of Gas Leak

Surface temp. of heat

exchanger interchanging

pipe T (°C)

Standard 2.7 45.0 High 20/– 7/6

Heating High temperature*1 3.0 ~ 3.8 49.0 ~ 58.0 Low 27/– 24/18

Low temperature 2.0 34.0 High 20/– –10/–10
Standard 0.9 10.0 High 27/19 35/24

Cooling High temperature 1.0 15.0 High 32/23 43/26

Low temperature 0.6 1.0 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, the high temperature limit control operation is included.

– 16 –

5-2. RAS-18UFP-ES3 / RAS-18UA-ES3

FILE NO. SVM-04031

0.39m
(Connecting pipe)
∅12.70 mm

0.39m
(Flexible pipe)
∅12.70 mm

O.D.:12.70 mm

Compressor

P

Packed valve

(∅12.70)

5KS225DAA

Indoor unit

Evaporator

Multi blade fan

Condenser

Propeller fan
Outdoor unit

T

0.49m
(Connecting pipe)
∅6.35 mm

O.D.:6.35 mm

Packed valve

(∅6.35)

Capillary tube

∅

1.7x600

S

Refrigerant
R-410A 1.14 Kg

Mark ( ) means check points of Gas Leak

Ambient temp.

conditions DB/WB

(°C)

Indoor Outdoor

50Hz

Standard

pressure P

(MPaG)

Surface temp. of heat

exchanger interchanging

pipe T (°C)

Fan speed

(indoor)

Standard 0.9 10.0 High 27/19 35/24

Cooling High temperature 1.0 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.)

– 17 –

5-3. RAS-24UFHP-ES3 / RAS-24UAH-ES3

FILE NO. SVM-04031

0.39m
(Connecting pipe)

∅12.70 mm

0.39m
(Flexible pipe)
∅12.70 mm

O.D.:12.70 mm

Cooling

Heating

Tank

Cooling

Heating

Packed valve

Heating

4-way valve

Cooling

P

(∅12.70)

Compressor

PA290X3F-4MS

Condenser

Indoor unit

Evaporator

Multi blade fan

T

0.49m
(Connecting pipe)

∅6.35 mm

O.D.:6.35 mm

Packed valve

(∅6.35)

Capillary tube

∅2.0x700S

Refrigerant
R-410A 1.60 Kg

Fan speed

(indoor)

Ambient temp.

conditions DB/WB

(°C)

Indoor Outdoor

50Hz

Cooling
Heating

Propeller fan

Outdoor unit

Standard

pressure P

(MPaG)

Mark ( ) means check points of Gas Leak

Surface temp. of heat

exchanger interchanging

pipe T (°C)

Standard 2.7 43.0 High 20/– 7/6

Heating High temperature*1 3.1 ~ 4.0 52.0 ~ 59.0 Low 27/– 24/18

Low temperature 2.7 36.0 High 20/––10/–10
Standard 0.9 11.0 High 27/19 35/24

Cooling High temperature 0.8 12.0 High 32/23 43/26

Low temperature 0.5 1.0 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, the high temperature limit control operation is included.

– 18 –

5-4. RAS-24UFP-ES3 / RAS-24UA-ES3

FILE NO. SVM-04031

0.39m
(Connecting pipe)

∅12.70 mm

0.39m
(Flexible pipe)

∅12.70 mm

O.D.:12.70 mm

Cooling

Tank

Compressor

P

Packed valve

(∅12.70 )

5JS315DAG01

Indoor unit
Evaporator

Multi blade fan

T

0.49m
(Connecting pipe)
∅6.35 mm

O.D.:6.35 mm

Packed valve

(∅6.35)

Capillary tube

∅2.0x700S

Condenser

Refrigerant
R-410A 1.60 Kg

Fan speed

(indoor)

Ambient temp.

conditions DB/WB

(°C)

Indoor Outdoor

50Hz

Cooling

Propeller fan

Outdoor unit

Standard

pressure P

(MPaG)

Mark ( ) means check points of Gas Leak

Surface temp. of heat

exchanger interchanging

pipe T (°C)

Standard 0.9 6.0 High 27/19 35/24

Cooling High temperature 0.8 10.0 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.)

– 19 –

6. CONTROL BLOCK DIAGRAM

6-1. RAS-18UFHP-ES3, RAS-24UFHP-ES3

Indoor Unit Control Panel

Heat Exchanger Sensor

Temperature Sensor

Functions

• Louver Control

• 3-minute Delay at Restart for Compressor

FILE NO. SVM-04031

8 MHzM.C.U.

Hi POWER

Display

FILTER Sign

Display

Infrared Rays Signal Receiver

Initiallizing Circuit

Infrared

Rays

36.7 kHz

Remote

Control

From Outdoor Unit

Clock Frequence

Oscillator Circuit

Power Supply

Circuit

Noise Filter

• Motor Revolution Control

• Processing

(Temperature Processing)

• Timer

• Drain Pump ON/OFF

• Serial Signal Communication

Serial Signal

Transmitter/

Receiver

Serial Signal Communication

Relay

RY401

Louver ON/OFF Signal

Louver Driver

PRE DEF.

Sign Display

TIMER

Display

OPERATION

Display

Indoor Fan

Motor

Louver Motor

Float

Switch

Drain

Pump

REMOTE CONTROL

Infrared Rays

Remote Control

Operation (START/STOP)
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

Filter Reset

– 20 –

6-2. RAS-18UFP-ES3, RAS-24UFP-ES3

Indoor Unit Control Panel

Heat Exchanger Sensor

Temperature Sensor

Functions

• Louver Control

• 3-minute Delay at Restart for Compressor

FILE NO. SVM-04031

8 MHzM.C.U.

Hi POWER

Display

FILTER Sign

Display

Infrared Rays Signal Receiver

Initiallizing Circuit

Infrared

Rays

36.7 kHz

Remote

Control

From Outdoor Unit

Clock Frequency
Oscillator Circuit

Power Supply

Circuit

Noise Filter

• Motor Revolution Control

• Processing

(Temperature Processing)

• Timer

• Drain Pump ON/OFF

• Compressor ON/OFF

Driver

Relay
RY04

Compressor

Relay

RY401

Louver ON/OFF Signal

Louver Driver

FAN-ONLY

Sign Display

TIMER
Display

OPERATION

Display

Indoor Fan

Motor

Louver Motor

Float

Switch

Drain

Pump

REMOTE CONTROL

Infrared Rays

Remote Control

Operation (START/STOP)
Operation Mode Selection

AUTO, COOL, DRY, FAN ONLY

Temperature Setting
Fan Speed Selection

ON TIMER Setting

OFF TIMER Setting

Louver Auto Swing

Louver Direction Setting

ECO

Hi power

Filter Reset

– 21 –

7. OPERATION DESCRIPTION

FILE NO. SVM-04031

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 air inlet of the
indoor unit 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.

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

(2) Role of outdoor unit controller

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

• Compressor operation
control

• Operation control of
outdoor fan motor

• 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.) Heating and Cooling
Model only.

Operations according
to the commands from
the indoor unit

7-1-1. Louver control

(1) Vertical air flow louver

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

(2) Swing

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

7-1-2. 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

+

, MED, MED
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.

Table 7-1-1

RAS-18UFHP-ES3 RAS-24UFHP-ES3

MODEL

Cooling HIGH 1060 800 1170 900

and MED 900 680 1000 750

Fan only LOW 800 580 850 650

Heating MED 950 700 1020 760

MODEL

Cooling HIGH 1060 800 1170 900

and MED 900 680 1000 750

Fan only LOW 800 580 850 650

Motor speed Air flow level Motor speed Air flow level

(rpm) (m3/h) (rpm) (m3/h)

HIGH 1120 830 1210 930

LOW 850 650 860 660

RAS-18UFP-ES3

LOW+=

LOW+MED

RAS-24UFP-ES3

2

MED+=

MED+HIGH

2

+

– 22 –

FILE NO. SVM-04031

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 [START / STOP] 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 microcontroller so that the previous operation
can be effected thereafter simply by pressing
[START / STOP] 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+, MED, MED+ or
HIGH, the motor operates with a constant air flow.

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 on the remote control are
controlled as shown in Fig. 7-2-2.

ON ON

OFF ON OFF OFF ON

Compressor

4-way valve

Common relay

(Preset temp.)

—

(Room temp.)

Preset
temp.

0.5

0

Fig. 7-2-2

display

Outdoor fan

OPERATION

+3
+2.5

(Preset temp.)

+2

—

+1.5
+1
+0.5

(Room temp.)

Preset
temp.

0

NOTE :

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

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

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

(2) ECO and Hi Power operation cannot be set.

M+

*1
*1
*1
L

(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.

+3
+2.5

(Preset temp.)

+2

—

+1.5
+1
+0.5

(Room temp.)

0

-0.5

M+

*1

*1
*1

L

—

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]

– 23 –

FILE NO. SVM-04031

(R

)

(P

)

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 on the remote control are
controlled as shown in Fig. 7-2-4.

ON:6min.

OFF

ON:5min.

OFF

4-way valve

OFF:4min.

ON

OFF:5min.

Outdoor fan

(Preset temp.)

—

(Room temp.)

Preset
temp.

+3

+2

+1

ON:6min.

OFF:4min.

ON

ON:5min.

OFF:5min.

OFF

0

Compressor

Common relay

Fig. 7-2-4

(2) The microcontroller turns the compressor on and

off at the regular intervals (4 to 6 minutes). While
the compressor is turning off, the indoor fan motor
operates in the SUPER LOW position.
The pattern of operation depending on the relation
between room temperature and preset
temperatures is shown in Fig. 7-2-5.

Room temp.

Preset temp.+1
Preset temp.

7-2-4. Heating operation *Heating and cooling 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 on the remote control are
controlled as shown in Fig. 7-2-6.

Preset
temp.

display

OPERATION

0

reset temp.

-0.5

—

oom temp.

ON ON

OFF

ON

Compressor

Common relay

Fig. 7-2-6

(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

(Preset temp.)

—

ON

OFF

ON

4-way valve

L

*1
*2

+

M

display

Outdoor fan

OPERATION

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.

(4) The ECO and Hi POWER operations can not be

set.

-5.0

-5.5

[FAN AUTO]

(Room temp.)

*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 flow [FAN:AUTO]

– 24 –

H

FILE NO. SVM-04031

(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 sho wn in Fig.
7-2-8 and Table 7-2-1.

AUTO

34

46

33

45

21

33

20

32

*2

A + 4
A – 8

*6

A + 4
A – 8

*5

*4

SUL*3

SUL*1

Stop

Manual
(one of 5
steps)

L – H
(Up to
setting
speed)

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.

Fig. 7-2-8 Cold draft preventing control

*5 and *6:

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

–1

Heating operation

(Room temp.) – (Preset temp.)

RAS-18UFHP-ES3 RAS-18UFP-ES3
RAS-24UFHP-ES3 RAS-24UFP-ES3

Fan
speed

AUTO

Manual
(L – H)

Table 7-2-1

*5

Starting period

• 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

• Room temperature
<

Preset temperature

–4°C

Fig. 7-2-9

*6

Stabilized period

• 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

–3.5°C

– 25 –

FILE NO. SVM-04031

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 difference between the preset temperature
and the room temperature is big, the horizontal
louver moves to the Hi POWER position
automatically. Then when the difference
between them gets smaller, the horizontal
louver returns automatically.

• FAN speed : [AUTO]
If the difference between the preset temperature
and room temperature is big, the air conditioner
operates at maximum airflow level. If the
difference between the preset temperature and
the room temperature is small, the air
conditioner operates at normal airflow level.

• FAN speed : One of 5 levels
The air conditioner operates at normal airflow
level.

7-4. High-Temperature Limit Control

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

Compressor

OFF

ON

ON

Outdoor fan

OFF

OFF

ON

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

Less than 2 continues

Outdoor fan

ON

for 5 minutes

OFF

(3) Heating operation *Heating and Cooling Model

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.

Fig. 7-5-1

7-6. Defrosting Operation

*Heating and Cooling Model only

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.

– 26 –

FILE NO. SVM-04031

PRE.DFILTERHi POWER

PRE.DFILTERHi POWER

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.

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

0

3S

→
→

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

After approx. three seconds,

When the unit is in operation

Operation Motions

Push [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,

TEMPORARY

button

0

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.

• While the filter check lamp is on, the TEMPORARY
button has the function of filter reset button.

• This function can not be set if the timer operation
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.

– 27 –

7-7-2. How to cancel auto restart function

PRE.DFILTERHi POWER

PRE.DFILTERHi POWER

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.

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

→

FILE NO. SVM-04031

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

0

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

3S

TEMPORARY

button

• While this function is being set, if the unit is in
operation, the orange lamp is on.

7-7-3. Power failure during timer operation

When the unit is in Timer operation, if it is turned off
because of power failure, the timer operation is
cancelled. Therefore, set the timer operation again.

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

When the elapsed time reaches 1000 hours, the filter
check lamp indicates. After cleaning the filters, turn off
the filter check lamp.

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

(1) Press [FILTER] button on the remote control.
(2) 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.

– 28 –

FILE NO. SVM-04031

8. INSTALLATION PROCEDURE

8-1. Safety Cautions

For general public use

Power supply cord of Outdoor unit shall be more than 4 mm2 (H07RN-F or 245IEC66 : polychloroprene
sheathed flexible cord) or 3.5 mm2 (AWG-12).

CAUTION

• THIS AIR CONDITIONER USES THE NEW HFC REFRGERANT (R-410A), WHICH DOES NOT

DESTROY THE OZONE LAYER.

R-410A refrigerant is apt to be affected by impurity such as water, oxidizing membranes, and oils because
the pressure of R-410A refrigerant is approx. 1.6 times of refrigerant R-22. 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 (R-410A) as shown below. For
connecting pipes, use new and clean piping materials with high-pressure withstand capabilities, designed for
R-410A 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 plug must be disconnected from the power supply socket in order to disconnect the
appliance completely from the mains.

New Refrigerant Air conditioner Installation

To Disconnect the Appliance from the Main Power Supply

– 29 –

FILE NO. SVM-04031

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 (R-410A) 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.

– 30 –

FILE NO. SVM-04031-(1)

8-2. Installation Diagram of Indoor and Outdoor Units

For installation of the indoor unit, use the Paper pattern, which is inside the package box cover.

(Under Ceiling Installation)

200 mm or more

Before install the wireless
remote control

• With the remote control cover

open, load the batteries supplied
correctly, observing their polarity.

22

2 Wireless remote control

22

Cover

33

3 Batteries

33

Insulate the refrigerant
pipes separately with
insulation, not together.

70 mm or more

200 mm or more

2 Wireless remote

control

9 Pan head

wood screw

Pipe
shield

4 Remote control

holder

1 Installation

plate

200 m
or more

m

6 Zeolite filter

Air filter

(Console Installation)

70 mm or more

5 Filter frame

7 Bioenzyme filter

Hook

200 mm

or m

8

Mounting
screw

ore

6 mm thick heat resisting
polyethylene foam

Loop the connective cable
(about 100 mm in diameter and 300 – 350 mm long).

1

0

0

mm

or mo

r

e

more

r

o

mm

00

6

18 Class

Heat pump

m

or

m

m

0

10

600 mm or more

ore

Extension
drain hose
(Option:
RB–821SW)

Electric
parts
cover

6

0

0

mm

o

r

m

o

r

e

Cooling only

– 31 –

Vinyl tape Apply
after carrying out
a drainage test

Saddle

Extension

r more

m o

m

0

10

e

r

o

600 mm or more

1

0

0

mm

or mo

r

e

6

0

0

mm

o

r

m

o

re

r m

o

mm

600

drain hose
(Option:
RB–821SW)

Electric
parts cover

6

0

0

m

o

r

m

mo

r

e

24 Class18 Class

Loop the connective cable
(about 100 mm in diameter and 300 – 350 mm long).

8-3. Installation

8-3-1. Optional installation parts

FILE NO. SVM-04031-(1)

Part

Code

Parts name

Refrigerant piping
Liquid side : ∅6.35 mm

A

Gas side : ∅12.70 mm
Pipe insulating material

B

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

C

<Fixing bolt arrangement of outdoor unit>

RAS-18UAH-ES3, RAS-18UA-ES3

600 mm

52 mm

325 mm

Air inlet

120 mm

Q'ty

One

each

1

One

each

Air outlet

Drain outlet

Fig. 8-3-1

RAS-24UAH-ES3, RAS-24UA-ES3

600 mm

120 mm

120 mm

64 mm

340 mm

52 mm

Air outlet

Fig. 8-3-2

Air inlet

Drain outlet

RAS-18UA-ES3

325 mm

52 mm

600 mm

Air inlet

120 mm

Air outlet

Air outlet

Fig. 8-3-3

• 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 ! to the bottom plate of the outdoor unit

before installing it.

– 32 –

8-3-2. Accessory and installation parts

FILE NO. SVM-04031

Part

No.

Part name (Q'ty)

1

Installation plate x 1

2

Wireless remote control x 1

3

Battery x 2

4

Remote control holder x 1

Part

No.

Part name (Q'ty)

5

Filter frame x 2

6

Zeolite filter x 1

7

Bioenzyme filter x 1

8

Mounting screw ∅4 x 25 s x 8

Part

No.

Part name (Q'ty)

9

Pan head wood screw
∅3.1 x 16 s x 2

!

Drain nipple x 1 (Packaged with
the outdoor unit)

"

Flexible pipe x 1

#

Pipe shield x 1

Others : Owner's manual, Installation manual
Option : For the Extension drain hose, use an optionally available RB-821SW or commercially available one.
This model is not equipped with an Extension drain hose.

– 33 –

FILE NO. SVM-04031

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

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

• In order to increase the pressure
size of opposite side of flare nuts have been changed. (for copper pipes with nominal dimensions 1/2 and 5/8)

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

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

Charge hose In order to increase pressure withstand strength,

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

withstand

strength of the refrigerant piping, flare processing diameter and

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

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.

of a charging cylinder, as air bubbles occur.

Torque wrench
(nominal dia. 1/2, 5/8) Incidentally, a common wrench is used for nominal

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 with a conventional flare
adjustment tool.

V acuum pump adapter Connected to conventional vacuum pump. It is

Gas leakage detector Exclusive for HFC refrigerant.

• Incidentally, the “refrigerant cylinder” comes with the refrigerant designation (R-410A) and protector coating in
the U. 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 port size of the charge hose.

—

The size of opposing flare nuts has been increased.
diameters 1/4 and 3/8.

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

– 34 –

FILE NO. SVM-04031

8-4. Indoor Unit

8-4-1. Installation place

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

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

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

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

CAUTION

• Direct sunlight or fluorescent light to the indoor
unit's wireless receiver should be avoided.

• The microprocessor in the indoor unit should not
be too close to RF noise sources.
(For details, see the owner's manual.)

<Remote control>

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

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

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

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

<Remote control usage>

• Under Ceiling Installation

Ceiling

Wall

5 m

Reception range

* Axial distance

Fig. 8-4-1

• Console Installation

Reception

Wall

range

7 m

Remote control

Reception range

5 m

*7 m

Remote control

7 m

Remote control

Floor

5 m

Reception range

* Axial distance

5 m

Remote control

Fig. 8-4-2

NOTICE

The Paper pattern is inside the package box cover.
Do not bend and dispose of it before installing.

– 36 –

*7 m

FILE NO. SVM-04031

8-4-2. Before installation
<Remove the Air inlet grille>

1. Open the Air inlet grille with both hands.

2. Loosen three screws for fixing the Panel arm.
Do not remove the screws at this time.

1

2

1

Screw

2

Panel
arm

Fig. 8-4-3

3. First, move the Air inlet grille upward, then turn it
backwards.

4. Remove the Grille stopper from the axis of the Front
panel. After that, remove the Air inlet grille

5. Remove the Panel arms from the Front panel.

Panel arm

5

Grille stopper

3

3

8-4-3. After installation
<Install the Air inlet grille>

1. Insert the three Panel arms on the Air inlet grille and
fix each securely by screws.

Panel arm

Fig. 8-4-5

CAUTION

• The screws that fixed with Panel arms must not

be loose.

2. Set the Air inlet grille arm to the axis of the Front
panel.

3. Insert the Grille stopper to the correct position and
fix it securely with screws.

4. Push the Air inlet grille to the correct position.

Fig. 8-4-4

Air inlet
grille arm

Axis of the
Front panel

Rib

Fig. 8-4-6

– 35 –

FILE NO. SVM-04031

8-4-4. Under ceiling installation

For the installation of the indoor unit, use the Paper
pattern, which is inside the package box cover.

<Install the Suspension bolts>

• Install the suspension bolts so that it can support
the indoor unit.

240 mm or more

1093
1015

140

330

60

235 mm

or more

Fig. 8-4-7

• Adjust distance to ceiling before installation.

25~30 mm

40~45 mm

Suspension
bolt

Washer

Nut (M10)

Spring
washer

<Install the indoor unit>

1. Remove the Side covers and the Installation plate

1.

2. Insert the Suspension bolts into the metal fittings of
the indoor unit.

3. Set to nuts, spring washers and washers on both
sides of the metal fittings and then move the indoor
unit backward.

4. Secure it with the M10 Nuts. (4pcs)

5. Attach the Side covers to the unit.

11

1 Installation plate

Suspension bolt

Side cover

3

2

4

Nut (M10)

11

Suspension bolt

Side cover

Fig. 8-4-9

Spring
washer

Fig. 8-4-8

Washer

Nut (M10)

Suspension
bolt (M10)

<Condition for installation>

• The unit must not decline more than 15 mm in either
axis.

15 mm

15 mm

Fig. 8-4-10

– 37 –

FILE NO. SVM-04031

<Piping and Drain hose installation>

• The piping direction can be 4 ways as illustrated.

• The Drain hose is only one way.

Upper piping

Rear upper piping

Side piping

Rear piping Drain hose

Fig. 8-4-11

• How to install the Drain hose.

1. Remove the two screws and the Drain band.

2. Cut a slit for the drain hose hole.

Slit for drain hose hole

• Rear side piping with Drain hose. (Recommended
direction)

Ceiling

175 mm
or more

Rear piping hole ∅80

Ceiling

140 mm

Wall

Fig. 8-4-14

1. Cut or remove the determined direction slit or cover.

2. Pipes and the Drain hose should be fixed together
by the Drain band with two screws.

Cut

Drain band

Screws

Fig. 8-4-12

3. Place the Drain hose on the U- shape space and
secure it with the Drain band and two screws.

Fig. 8-4-13

Fig. 8-4-15

• Other direction piping.

1. Cut the slit of connecting only upper direction.

Slit for upper piping

Cover for rear

Cover for side piping

upper piping

Drain hose

Fig. 8-4-16

2. Connect the Flexible pipe " to the large pipe (Gas
side).

Big pipe

– 38 –

""

" Flexible pipe

""

Fig. 8-4-17

FILE NO. SVM-04031

8-4-5. Console installation

• Select the terminal of Selector-SW from [C position] to
[F position].

B

F

INSTALL

REMOCON

A

C

Fig. 8-4-18

<Cutting a hole and mounting the installation plate>

• When installing the rear piping, determine the pipe
hole position, drill the pipe hole (∅80 mm) at a slight
downward slant to the outdoor side.

• For mounting of the Installation plate 1, use the Paper
pattern, which is inside the package box cover.

1093

742

375 mm
or more

<Install the indoor unit>

• Install the Installation plate 1 at the wall according to
the Paper pattern.

• Hang the indoor unit on the hooks of the Installation
plate 1.

• Fix the lower portion of the indoor unit with Mounting
screws 8 (2 places).

Indoor unit

Hook

11

1 Installation

11

plate

88

8 Mounting screw

88

160

390 mm

or more

320

Floor

140

Rear piping hole. ∅80

633

60

Fig. 8-4-19

Anchor bolt

Projection

5 mm dia. hole

Clip anchor
(local parts)

88

8 Mounting

88

screw
∅4 x 25

15 mm or less

ss

s

ss

Fig. 8-4-20

CAUTION

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

88

8 Mounting screw

88

Fig. 8-4-21

<Condition for installation>

• The unit must not decline more than 15 mm in either
axis.

15 mm

Fig. 8-4-22

• 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 8.

NOTE:

• Secure four corners and lower parts of the Installation
plate 1 with 6 to 8 mounting screws to install it.

– 39 –

FILE NO. SVM-04031

<Piping and Drain hose installation>

• The piping direction can be the following 3 ways with
the Drain hose.

• Each piping direction should be connected with the
Flexible pipe ".

Rear piping

Side piping

Bottom piping

Fig. 8-4-23

• Cut or remove the determined direction slit or cover.

Slit for upper piping

Cover for side piping

Cover for rear upper
piping

8-4-6. Wiring connection
<How to connect the connecting cable>

Terminal cover

Screws

Cord clamp

Earth terminal

Fig. 8-4-25

1. Remove the Terminal cover and the Cord clamp.

2. Insert the connecting cable into the pipe hole on the
wall.

3. Insert the connecting cable fully into the Terminal
block and secure it tightly with the screw.
Tightening torque: 1.2 N·m (0.12kgf·m)

4. Fix the connecting cable by the Cord clamp with two
screws.

5. Fix the Terminal cover.

<Stripping length of the connecting cable>

Fig. 8-4-24

10

10

40

50

Earth line

Fig. 8-4-26

NOTE:

Use strand wire only.

• Wire type : More than 1.5 mm2 (H07RN-F or 245
IEC66) or 1.3 mm2 (AWG-16)

Fig. 8-4-27

NOTE:

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

– 40 –

FILE NO. SVM-04031

8-4-7. Pipe shield for flare nut connection

Joints in liquid and gas pipes of the indoor unit should
be insulated with an attached Pipe shield #.

<How to install the Pipe shield>

1. Cut the Pipe shield # to appropriate length.

2. Set the Pipe shield #.

3. In case of a ceiling installation, orient the slit at the
top of the pipe.

4. Fix the Pipe shield # with vinyl tape.

Vinyl tape

##

# Pipe shield

##

Slit

Fig. 8-4-28

8-4-8. Drainage

1. Run the Drain hose sloping downward.

NOTE:

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

Under Ceiling Installation Console Installation

50 mm
or more

50 mm
or more

Fig. 8-4-29

NOTICE

In the case of upward drainage from the unit,
(Under Ceiling Installation), it is necessary to use
Drain pump kit of optional part.

CAUTION

1. Do not raise the Drain hose.

2. Do not put the Drain hose into water.

3. Do not form the Drain hose into a wave shape.

4. Do not put the Drain hose end in the drainage

ditch.

2. Open the louver manually and put some water into it.
Then check the flow of water from the Drain hose.

Fig. 8-4-30

3. When connecting the Extension drain hose, insulate
the connecting part of Extension drain hose with the
Pipe shield.

Pipe Shield

Drain hose

Inside the room

Extension drain hose

Fig. 8-4-31

CAUTION

Arrange the drain pipe for proper drainage from the
unit.
Improper drainage can result in dew-dropping.
(Provided by customer)

– 41 –

FILE NO. SVM-04031

8-5. Outdoor Unit

8-5-1. Installation place

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

• A place which can bear the weight of the outdoor
unit and does not allow an increase in noise level
and vibration.

• A place where the operation noise and discharged
air do not disturb your neighbors.

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

• A place free of a leakage of combustible gases.

• A place which does not block a passage.

• When the outdoor unit is to be installed in an

elevated position, be sure to secure its feet.

• An allowable length of the connecting pipe is up to
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.

CAUTION

1. Install the outdoor unit without anything

blocking the air discharging.

2. When the outdoor unit is installed in a place

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. Especially in windy area, install the unit to

prevent the 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.

8-5-2. Refrigerant piping connection

1. Cut the pipe with a pipe cutter.

90°

Obliquity

Roughness

Fig. 8-5-2

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

A

Die

Pipe

Fig. 8-5-3

Projection margin in flaring : A (Unit : mm)

Outer dia.

of copper pipe

6.35

12.70

Rigid

1.0 to 1.5

1.0 to 1.5

A

Imperial

1.5 to 2.0

2.0 to 2.5

Warp

Strong

wind

Fig. 8-5-1

– 42 –

FILE NO. SVM-04031

<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.

(Unit : N·m)

Outer dia.

of copper pipe

∅6.35 mm
∅12.70 mm

• Tightening torque of flare pipe connections

The operating pressure of R-410A is higher than that
of R-22 (Approx. 1.6 times). It is therefore necessary to
tighten firmly flare pipe connecting sections (which
connect the indoor and outdoor units) up to the
specified tightening torque. Incorrect connections may
not only cause a gas leakage, but also damage the
refrigerant cycle.

Fig. 8-5-4

Half union

Externally
threaded side

Use a wrench to secure.

Tightening torque

16 to 18 (1.6 to 1.8 kgf·m)
50 to 62 (5.0 to 6.2 kgf·m)

Flare at
outdoor unit side

Flare nut

Internally
threaded side

Use a torque wrench to tighten.

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 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 inside oil of the vacuum pump
enters into the air conditioner which adopts R-410A, a
trouble of the refrigeration cycle may be caused.)

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

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

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

7. Remove the charging hose from the service port.

8. Securely tighten the caps on the packed valves.

Compound pressure gauge

-101kPa (-76cmHg)

Handle Lo

Charge hose
(For R-410A only)

Pressure gauge

Manifold valve

Handle Hi
(Keep full closed)

Charge hose
(For R-410A only)

Fig. 8-5-5

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 –

Connecting pipe

Vacuum pump
adapter for
counter-flow
prevention
(For R-410A only)

Vacuum

pump

Packed valve at gas side

Service port
(Valve core (Setting pin))

Packed valve at liquid side

Fig. 8-5-6

FILE NO. SVM-04031-(1)

TO CHARGE REFRIGERANT

No need to charge
refrigerant

Need to charge
refrigerant

RAS-18UFHP-ES3 / 18UAH-ES3

RAS-18UFP-ES3 / 18UA-ES3

15 m or less

Over 15 m up to

20 m (20g/m)

RAS-24UFHP-ES3 / 24UAH-ES3

RAS-24UFP-ES3 / 24UA-ES3

15 m or less

Over 15 m up to

25 m (20g/m)

<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:

Pipe side ATightening torque

Gas side
(∅12.70 mm)

Liquid side
(∅6.35 mm)

Service port

50 to 62 N·m
(5.0 to 6.2 kgf·m)

16 to 18 N·m
(1.6 to 1.8 kgf·m)

9 to 10 N·m
(0.9 to 1.0 kgf·m)

4 mm

Same as
Gas side

• Hexagonal wrench : A (Unit : mm)

Hexagonal wrench
is required.

A

<Stripping length of connecting cable>

Terminal block

LN 1 32

Terminal
screw

Cord clamp

Power supply cord

Earth line

Screw

Cord clamp

Connecting cable

Fig. 8-5-8

L

N

10

10

60

Power supply cord

70

Earth line

123

10

10

60

Connecting cable

Fig. 8-5-9

Power source
Maximum running

current
Plug socket &

fuse rating

Power cord

RAS-18UFHP-ES3 / 18UAH-ES3

RAS-18UFP-ES3 / 18UA-ES3

50 Hz, 220 – 240 V Single phase

16A 18A

4 mm2 (H07RN-F or 245 IEC 66) or 3.5 mm
(AWG-12)

RAS-24UFHP-ES3 / 24UAH-ES3

RAS-24UFP-ES3 / 24UA-ES3

20A

70

2

Fig. 8-5-7

8-5-4. Wiring connection

1. Remove the electric parts 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.

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 mm2 (H07RN-F or 245
IEC66) or 1.3 mm2 (AWG-16)

– 44 –

FILE NO. SVM-04031

8-6. How to Set Remote Control Selector

Switch

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

<Remote control selector switch>

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

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

1. Set the remote control selector switch 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. (Refer to page 35, 8-4-2)

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.

A
B

A
B

Fig. 8-6-1

3) Select the terminal of selector switch from [A
position] to [B position].

C

A

REMOCON

INSTALL

F

B

Fig. 8-6-2

PRESET

START/STOP

ECO

AUTO

Hi-POWER

MEMO

CLOCK CHECKRESET

[MODE] button

FAN MODE

SWING

TIMER

FIX

ON

OFF SET CLR

FILTER

[CHECK] button

Fig. 8-6-3

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

– 45 –

FILE NO. SVM-04031

PRE.DFILTERHi POWER

8-7. How to Use Drain Pump Kit of Option

In the case of upward drainage from the unit (Under
ceiling installation). It is necessary to use Drain pump
kit of option parts. By using a Drain pump kit, it
becomes possible to raise 300 mm from a ceiling side.
Please follow the installation manual of Drain pump kit
(TCB-DP10CE) attachment.

300 mm

Drain pump kit

Fig. 8-7-1

8-8. Others

8-8-1. Gas leak test

Electric parts cover

Flare nut connections
(Outdoor unit)

D

B

Valve stem cap connection

Fig. 8-8-1

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

8-8-2. Test operation

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

C

Flare nut connections
(Indoor unit)

Valve stem cap
connection

A

Service cap connection

TEMPORARY

button

Fig. 8-8-2

8-8-3. 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.

– 46 –

9. TROUBLESHOOTING CHART

FILE NO. SVM-04031

9-1. Troubleshooting Procedure

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.

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

9-2. Basic Check Items

connected, the outdoor unit will not operate normally,
or OPERATION lamp and TIMER lamp will blink (5Hz).

9-2-1. Power supply voltage

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

9-2-3. Program control

The microcomputer 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.

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

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.

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 Auto-

matic operation.

9 The Fan only operation continues in the

Automatic operation.

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.

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 detacted every
15 minutes and the operation mode is changed 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.

10 The Hi-POWER operation does not work.

This operation does not work when the unit is in the Dry operation
or Fan only operation.

– 47 –

FILE NO. SVM-04031

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 or cooling only model) lamps
are blinking.

H OPERATION, TIMER and PRE-DEF.

(or FAN ONLY or 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.

• Gas shortage or other refrigerant cycle trouble

• Heat exchanger sensor open, break or short

• Overload relay or thermostat trouble of compressor

Cycle failure

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 is defective.

– 48 –

9-4. Self-Diagnosis by Remote Control

(Check Code)

(1) If the lamps are indicated as shown B to H 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

SET CLR

CLOCK CHECKRESET

FILE NO. SVM-04031

(1) Press [CHECK] 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 continu
ously. (5 times per 1 sec.)

AUTOA

A
B

PRESET

START/STOP

ECO

AUTO

Hi-POWER

MEMO

CLOCK CHECKRESET

FAN MODE

SWING

TIMER

FIX

ON

OFF SET CLR

FILTER

• Alphanumeric characters are used for the check code.

(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 ; 02 ··· 1d ; 1E ; 22

• 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.

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

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

mode.

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

– 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-04031-(1)

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

Operation

Measure

Item by symptoms

Check item

Conceivable principle

cause

[04 Serial signal error]

FILE NO. SVM-04031

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.

Connect crossover

wires properly.

Connect crossover

properly.

Replace

P.C. board.

Replace

P.C. board.

[08 Four-way valve error]

Does four-way valve

operate properly?

Is TC sensor resistance

value (10kΩ at 25°C)

YES

normal?

NO

NO

YES

Does coil terminal

have 220 – 240 V

in heating operation?

NO

Are circuit

wires normal?

YES

Is outdoor P.C. board

normal?

YES

YES

NO

NO

– 51 –

Four-way valve

is defective.

Outdoor P.C. board

is defective.

Indoor P.C. board

is defective.

Replace

Four-way valve

Circuit check/modification

Replace

P.C. board.

Replace

P.C. board.

Replace TC sensor.

[09 Other cycle error] (1)

FILE NO. SVM-04031

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

(in compressor)

Is circuit wiring

P.C. board normal?

Does inner

overload relay

operate?

NO

normal?

YES

Is outdoor

YES

YES

NO

NO

Check charged amount of refrigerant.
Check defective overload.
Check compressor.

Failure

Wiring check/modification

Outdoor P.C. board

is defective.

Indoor P.C. board

is defective.

Replace

compressor.

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

Is indoor fan

motor normal?

YES

normal?

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

Clean filters.

Replace

TC sensor.

Anti-freezing

operation

Charge

refrigerant.

Anti-freezing

operation

Indoor P.C. board

is defective.

– 52 –

Replacd

P.C. board.

[0C Indoor TA sensor error]

FILE NO. SVM-04031

Is CN03 (TA sensor connector)

connected properly?

YES

Is TA sensor resistance value

(10 kΩ at 25°C) normal?

YES

[0d Indoor TC sensor error]

Is CN01 (TC sensor connector)

connected properly?

YES

NO

NO

NO

Indoor P.C. board is defective.

Connect CN03

properly.

Replace T A sensor.

Replace P.C. board.

Connect CN01

properly.

Is TC sensor resistance value

(10 kΩ at 25°C) normal?

YES

[18 outdoor TE sensor error]

Is TE sensor connector

connected properly?

YES

Is TE sensor resistance value

(10 kΩ at 25°C) normal?

YES

NO

NO

NO

Indoor P.C. board is defective.

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]

FILE NO. SVM-04031

Is TD sensor

connected properly?

YES

Is TD sensor resistance value

(50 kΩ at 25°C) normal?

YES

[1E Discharge temp. error]

Is protective controller

such as discharge

thermostat normal?

YES

NO

NO

NO

Indoor P.C. board is defective.

Are wires connected to

connector properly?

NO

Connect connector

properly.

Replace TD sensor.

Replace P.C. board.

Connect wires to

connector properly.

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

YES

NO

Outdoor P.C.board is defective.

Check and modify charged

amount of refrigerant.

Unit operates normally.

Replace TD sensor.

Replace P.C. board.

– 54 –

9-6. Troubleshooting for Indoor Unit

Operation

Measure

Item by symptoms

Check item

Conceivable principle

cause

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

(1) Is the supply voltage normal?
(2) Is the connection to the AC output OK?
(3) Are the connection of the primary side and the secondary side of

the power transformer inserted into the P.C. board?

(4) Is the fuse (F01) blown?

Is fuse (F01)

of indoor

control board

(DC 12V or 5V)

indicated on

rear of indoor

control board

310 - 340V
supplied to

primary side

of transfer

Are AC 14V,

supplied to

secondary

blown?

NO

Is voltage

normal?

NO

Is DC

switch?

YES

and

AC 7V

side of

transfer

switch?

YES

YES

YES

NO

NO

Turn off power

supply once, and

5 second later,
turn it on again.

Is OPERATION

lamp blinking?

Is it possible to

turn on power

supply by pressing

[START/STOP]

remote control?

transmission mark

on remote control

flash normally, and

Check selector

switch of remocon

A or B is correct

remote controller

Parts (R21,

R22, SG01,

C15, C01,

DB01, C02,

and T01) are

defective.

Refer to

<Primary check>

or this problem is

one step short of

power P.C. board

block.

Turn off breaker
once and turn it

on again after

removing motor.

button on

NO

Does

is its signal
transmitted

properly?

YES

same as

YES

YES

NO

NO

Are AC 14

and AC 7V

supplied to

secondary

side of

transfer

switch?

YES

Remote control is

defective.

Does the
fan motor

connector between

1and 3

short-circuit?

YES

Microcomputer is

defective.

V

SW transformer

NO

(T01) or Tr (Q01)

for power supply

is defective.

FILE NO. SVM-04031-(1)

Unit operates

normally.

Refer to 9-9

Troubleshooting for

Remote Control.

Select switch to
remocon A,B for
correct same as

remote controller

NO

Replace main P.C.

board.

Replace motor.

– 55 –

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

Shut off the

power supply once.

Turn the power supply.

FILE NO. SVM-04031

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

Replace the P.C. board.

Does connecting

terminal, connecting

NO NO

NO

cable or power supply

cord completely?

Does not found the short

wire about connecting

cable and power cord?

YES

Repair the
bearing of

the fan.

Motor control circuit failure

(IC30, IC03, RY501) or 12V

power circuit failire

(D305, D306, Q301, T01).

Replace the P.C. board.

Thermal fuse operated

due to prevent

temperature rising cause

of incompleted connecting.

Normal

Is the rotation signal

(DC+5V-0V)output between 3

(Brown lead wire) and 2 (Gray

lead wire) of the motor connector

(CN11) when rotating the cross

flow fan by hand in no operating

status? (3 pulses/one turn)

YES

Replace the control

P.C. board.

– 56 –

NO

Replace the of

fan motor

Replace connecting the

cable (or power cord),

thermal fuse and

terminal block.

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>

-Cooling only model-

Turn on power supply.

FILE NO. SVM-04031

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

Is capacitor for compressor normal?

normal?

(Check winding resistor.)

YES

NO

NO

NO

Is resistance value of

thermo sensor (TA) and heat

exchanger sensor (TC) normal?

YES

Microcomputer is defective.

Miniature relay RY04

is defective.

NO

NO

NO

Compressor is defective.

Capacitor is defective.

NO

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>

- Colling model -

Turn on power supply.

FILE NO. SVM-04031-(1)

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

and TC sensors.

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-04031-(1)

Replace transformer

outdoor

P.C. board.

− 59 −

YES

FILE NO. SVM-04031-(1)

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-04031-(1)

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.
 Prepare a diode for checking.

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.

Abnormal condition : Don't found voltage AC 220 ~ 240V (For Asia model), AC 220V 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-04031-(1)

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

disconnection, 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 procedure

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 TP3 and TP4 of CN30
and CN31 (220 – 240V AC)

2. Between + and – of C02
(DC310 – 340V)

3. Between 12V and GND

4. Between 5V 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 C15), line
filter (L01), resistor (R01), or the
diode (DB01) is defective.

3. Q301, F02 and T01 are defective.

4. Q301, F03, IC07 and T01 are
defective.

3 Press [START/STOP] 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.

5 Press [START/STOP] 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.)

Check power supply voltage;
<Heating and cooling model>

1. Between CN31 and CN23
(AC70 – 100V)

<Cooling only model>

1. Between collector of Q33 and
GND (for relay coil (DC12V))

2. Between 2 and 3 of terminal block
for connecting cable

Check whether or not all lamps
(OPERA TION, TIMER,
PRE.-DEF. (or FAN ONLY), ECO and
AUTO) are indicated for 3 seconds

1. Check whether or not the
compressor operates.

2. Check whether or not the
OPERATION lamp blinks.

<Heating and cooling model.>
IC05 and IC06 are defective.

<Cooling only model>

1. The wire of the relay coil (RY04)
comes down or the relay drive
(Q33) is defective.

2. CN27 or RY04 is connected
wrongly.

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

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.

– 62 –

FILE NO. SVM-04031-(1)

No. Procedure Check points Causes

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.

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 high.

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

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

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

6 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

1. Check it is impossible to detect
the voltage between 2 and 3 of
the CN11.

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

2. The motor rotates but vibrates
strongly.

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

2. The connection of the motor
connector is loose.

3. The P.C. board is defective.

condition.)

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

Temperature 0°C10°C20°C25°C30°C

Resistance value 35.8 20.7 12.6 10.0 7.92

(kΩ)

9-8-2. How to shorten time of restart delay timer

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

with a tip of a pencil.

2 Then press [START/STOP] button ot transmit the

signal to the indoor unit.

AUTOA

START/STOP

FAN MODE

SWING

ON

ECO

TIMER

FIX

OFF SET CLR

FILTER

A
B

PRESET

AUTO

Hi-POWER

MEMO

CLOCK CHECKRESET

2

1

– 63 –

9-8-4. P.C. board layout

FILE NO. SVM-04031

T op View

Bottom View

– 64 –

9-9. Troubleshooting for Remote Control

FILE NO. SVM-04031

Is receiver on

indoor unit exposed

to direct sunlight?

YES

NO

Is there any

thyristor fluorescent

light nearby?

YES

NO NO

Press START/STOP

button.

Is transmission

mark indicated?

YES

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.

NO

Keep indoor unit

away from

thyristor

fluorescent light.

Does indoor unit

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?

YES

P.C. board is

defective.

Replace

P.C. board.

Is transmission mark

indicated?

NO

Does indoor unit

beep and operate?

NO

Replace

batteries.

Note : After replacing batteries,

press the RESET button
with a tip of a pencil.

Normal

operation

NO

YES

YES

Remote control

is defective.

Replace

remote control.

– 65 –

FILE NO. SVM-04031

10. PARTS REPLACEMENT

10-1. Indoor Unit

No. Part name Procedures Remarks

Air Inlet grille

1 <How to remove the Air inlet grille>

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

2) Open the Air inlet grille with both hands.

Air inlet grille

3) Unfasten 3 screws (about two to three
rounds) for fixing the Panel arms.

4) Move the Air inlet grille toward.

5) Remove the Grille stopper from the axis of
the Front panel. After that, remove the Air
inlet grille.

6) Remove the Panel arms from the Front panel.

Panel arm

Grille stopper

Air inlet grille

Panel arm

<How to install the Air inlet grille>

1) Insert three Panel arms on the Air inlet
grille and fix each securely by screws.

2) Set the Air inlet grille arm to the axis of the
Front panel. (Refer to page 34, 8-4-3)

3) Insert the Grille stopper to the correct
position and fix it securely with screws.

4) Push the Air inlet grille to the correct position.

– 66 –

FILE NO. SVM-04031

No. Part name Procedures Remarks

Front panel

2 <How to remove the Front panel>

1) Remove the Air inlet grille. (1)

2) In case of the Drain hose is installed
through the Front panel.
: Remove the Drain band from the Front

panel.

: Cut away the Opening base for piping

from Front panel and keep parts.

3) Open 3 Cap screws and remove the
screws.

4) Remove 5 screws fixing the Front panel.

Drain band

Cap screws

Front Panel

Drain panel

5) Remove the hooks of the Panel LED nearly
side from the Drain pan.

(Continue)

– 67 –

Screws

FILE NO. SVM-04031

No. Part name Procedures Remarks

Front panel

2 6) Remove both side hooks and remove the

Front panel by turn to air inlet part
direction.

<How to install the Front panel>

1) In case of the Drain hose installation
through the Front panel, install the opening
base for piping in the Back body by a screw
(M4 x 12). Prepare it by yourself.

2) Fit the Front panel in the Drain pan. Then
fix it in the Drain pan with 2 hooks in the
center of the air outlet.

3) Fix 5 hooks around the Front panel with
conformation the Guide-rib is inserting into
the Back body.

4) Fix 8 screws and close 3 Cap screws.

5) Install the Drain band into the Front panel.

6) Check the gap between the Front panel
and the Back body.

3 <How to remove the Drain pan>

Drain pan
assembly

1) Remove the Air inlet grille and the Front
panel. (1, 2)

2) Remove the Louver motor from the Drain
pan.

Hook

Guide-rib

3) Remove the shaft of Horizontal louver.

4) Remove the LED base and Electrical wire.

5) Remove the TA sensor wire.

6) Remove the Drain hose.

(Continue)

Louver motor

Electrical wire

Shaft of Horizontal lover

Drain hose

LED base

TA sensor

– 68 –

FILE NO. SVM-04031

No. Part name Procedures Remarks

Drain pan

3 7) Remove 7 screws and remove the Drain

assembly

pan assembly.

Screw

Screw

Drain Pan

Electrical parts

4 <How to remove the Electrical parts assembly>

assembly

1) Remove the Air inlet grille, the Front panel
and the Drain pan assembly. (1, 2, 3)

2) Remove the Terminal cover.

3) Unfasten the screw of Cord clamp and
disconnect the connecting cable.

4) Remove the Connector cover and
disconnect the Fan motor cords.

5) Remove the TC sensor and earth wire from
Refrigeration assembly.

6) Remove the Electrical parts assembly.
NOTE : When install the electrical parts
assembly, fix the screw after the Back body
is fixed.

5

Refrigeration
assembly

<How to remove the Refrigeration assembly>

1) Remove the Air inlet grille, the Front panel
and the Drain pan assembly. (1, 2, 3)

2) Stop the gas at the Outdoor unit.

3) Remove 2 pipes from the Refrigeration
assembly.

4) Remove the TC sensor from holder.

5) Remove the pipe holder.

6) Remove the earth wire.

Connecting
cable

Electrical parts
assembly

Cord clamp

Earth wire

TC sensor

Earth wire

Fan motor cords

TC sensor

Refrigeration
assembly

Pipe holder

– 69 –

(Continue)

FILE NO. SVM-04031

No. Part name Procedures Remarks

Refrigeration

5 7) Remove 2 screws and remove the

assembly

6 <How to remove the Multiblade fan and

Multiblade fan
and Fan motor

refrigeration assembly with pushing it to
right hand.

2 Screws

Fan cover

Fan motor>

1) Remove the Air inlet grille and the Front
panel. (1, 2)

2) Disconnect 2 connectors.

3) Remove the Fan covers.

4) Remove the Motor band with holding the
Fan motor and then remove the Fan motor
with the Multi-blade fans.

5) Unfasten the Set-screw and remove the
Multi-blade fans.

Motor band

Motor

Multi-blade fan

2 Connectors

– 70 –

FILE NO. SVM-04031

10-2. Outdoor Unit (RAS-18UAH-ES3)

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 electrical parts cover.

(4 screws ∅4 x 10L)

3) Remove 2 cord clamps (4 screws ∅4 x 22L) 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 front cabinet. (8 scerws ∅4 x 10L)

(Pull the front lower portion toward you, and pull out
it upward to remove it.)

5) Remove the side cabinet. (8 screws ∅4 x 10L)

Remove
8 screws ∅4 x 10L

4 screws ∅4 x 22L 4 screws ∅4 x 10L

2 Running

capacitor
for compressor

3 Running

capacitor
for fan motor

4 Magnetic

contactor

5 Transformer

6 P.C. Board

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 10L)

3) Disconnect the lead wires from the relay 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.

Running capacitor
for compressor

P.C. Board

Transformer

Running capacitor
for fan motor

Magnetic
contactor

− 71 −

FILE NO. SVM-04031

10-3. Outdoor Unit (RAS-18UA-ES3)

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 electrical parts cover.

(2 screws ∅4 x 10L)

3) Remove 2 cord clamps (4 screws ∅4 x 22L) 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 front cabinet. (8 scerws ∅4 x 10L)

(Pull the front lower portion toward you, and pull out
it upward to remove it.)

5) Remove the back cabinet. (4 screws ∅4 x 10L)

Remove
8 screws ∅4 x 10L

4 screws ∅4 x 22L 4 screws ∅4 x 10L

2 Running

capacitor
for compressor

3 Running

capacitor
for fan motor

4 Magnetic

contactor

5 Spark killer

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 screw ∅4 x 10L)

3) Disconnect the lead wires from the relay terminal.

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

compress or

Running
capacitor for
fan motor

Spark killer

Magnetic
contactor

− 72 −

FILE NO. SVM-04031-(1)

10-4. Outdoor Unit (RAS-24UAH-ES3, RAS-24UA-ES3)

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 electrical parts cover.
(4 screws ∅4 x 10L)

3) Remove 2 cord clamps (4 screws ∅4 x 22L) 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)

5) Remove the front cabinet. (2 screws ∅4 x 10L)

6) Remove the side cabinet
(4 screws ∅4 x 10L & 2 screws ∅4 x 14L)

Top cabinet

Front cabinet Side cabinet

4 screws ∅4 x 22L

Electrical
parts cover

2 Running

capacitor
for compressor

3 Running

capacitor
for fan motor

4 Magnetic

contactor

5 Transformer

(Heat pump model)

6 P.C. Board

(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.

1) Perform the common procedure 1

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.

Magnetic contactor

P.C. Board

Transformer

Spark killer

Running capacitor
for compressor

Running capacitor
for fan motor

RAS-24UAH-ES3

Running capacitor
for compressor

− 73 −

Magnetic contactor

RAS-24UA-ES3

Running capacitor
for fan motor

11. EXPLODED VIEWS AND PARTS LIST

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

FILE NO. SVM-04031

Location Part

No. No.

401 43T69311 PC Board (RAS-24UFHP-ES3)
401 43T69312 PC Board (RAS-24UFP-ES3)
401 43T69313 PC Board (RAS-18UFHP-ES3)
401 43T69314 PC Board (RAS-18UFP-ES3)
402 43T50004 Temperature sensor
403 43T60002 Terminal
404 43T62003 Cord clamp

Description

Location Part

No. No.

405 43T69315 Display unit
406 43T50302 Temperature sensor
407 43T69311 PC Board (RAS-24UFHP-ES3)
407 43T69312 PC Board (RAS-24UFP-ES3)
407 43T69313 PC Board (RAS-18UFHP-ES3)
407 43T69314 PC Board (RAS-18UFP-ES3)
408 43T08349 Switch cover

– 74 –

Description

11-2. Indoor Unit

FILE NO. SVM-04031

202

206

203

235

204

208

207

208

214

212

217

209

218

210

213

224

211

222

215

221

220

219

233

227

223

216

225

226

229

228

231

235

205

Location Part

No. No.

201

Description

201 43T09312 Air Inlet Grille

202 43T00357 Panel Arm Assy

203 43T00358 Front Panel Assy (Heat)

203 43T00361 Front Panel Assy (Cool)

204 43T01004 Mark

205 43T79303 Drain Band

206 43T80302 Air Filter

207 43T00359 Cap Screw C

208 43T00360 Cap Screw LR

209 43T20303 Fan Cover

210 43T20304 Motor Band Assy

211 43T20305 Multiblade Fan

212 43T19309 Screw Set (D-T)

213 43T21325 Fan Motor

214 43T72301 Drain Pan Assy

215 43T79304 Drain Hose Assy

216 43T19303 Stepping Motor Assy

217 43T09313 Horizontal Louver

218 43T44318 Refrigeration Assy (∅15.88) (24 Series)

218 43T44319 Refrigeration Assy (∅12.70) (18 Series)

219 43T03303 Back Body Assy

234

232

Location Part

No. No.

230

Description

220 43T09314 Vertical Louver

221 43T49303 Pipe Holder

222 43T19304 Cover Body L

223 43T19305 Cover Body R

224 43T19306 Cover Body LD

225 43T19307 Bush Body R

226 43T19308 Bush Body D

227 43T82302 Installation Plate

228 43T60314 Terminal Cover

229 43T62303 Connector Cover

230 43T83003 Remote control Holder

231 43T69309 Wireless Remote control

(RAS-18UFHP-ES3, RAS-24UFHP-ES3)

231 43T69310 Wireless Remote control

(RAS-18UFP-ES3, RAS-24UFP-ES3)

232 43T85436 Owner's Manual (Heat)

232 43T85437 Owner's Manual (Cool)

233 43T49304 Flexible pipe (∅12.70) Assy (18 Series)

233 43T49305 Flexible pipe (∅15.88) Assy (24 Series)

234 43T80003 Filter Flame

235 43T00365 Grille Stopper Assy

– 75 –

11-4. Outdoor Unit (RAS-18UAH-ES3)

FILE NO. SVM-04031

Location Part

No. No.

01 43005144 Cabinet, Front
02 43T00005 Cabinet, Back
03 43T00004 Cabinet, Side
04 43T42305 Base
05 43T00011 Plate, Packed, Valve
06 43T19314 Guard, Fan
07 43T19005 Handle
08 43T62301 Cover, E-Parts
09 43020302 Fan, Propeller

10 43T21332 Motor, Fan, AC 220 − 240V, 50Hz

11 43T47001 Nut, Flange
12 43T63004 Clamp, Lead Wire
13 43T96001 Bushing
14 43T43309 Condenser Assembly
15 43T46317 Valve, Packed, 6.35Dia.
16 43T47020 Bonnet, 6.35Dia.
17 43T46318 Valve, Packed 12.7Dia.
18 43T47018 Bonnet, 12.7Dia.

Description

Location Part

No. No.

19 43T47308 Capillary Tube, 1.0Dia.
20 43T47014 Capillary Tube, 1.7Dia.
23
24
25
26
27
28
29
30
31
32
33
34
35 43T69336 PC Board

38 43T60325 Filter, Clamp

− 76 −

Description

43T49008 Cushion, Rubber

43T55316 MF Capacitor (45µ F 370V)
43T55318
43T60324 Terminal Block, 6P
43T41311 Compressor, PA225X3F-4L

43T52304 Magnetic Contactor (CLK-26J)

43T46319 Valve, 4way

43T46310 Coil, V-4way AC 220 − 240V

43T69059 Sensor

43T69060 Sensor, TD

43T79305 Nipple, Drain

43T58301 Transformer, TT-05

MF Capacitor (2µ F 450V)

11-7. Outdoor Unit (RAS-18UA-ES3)

FILE NO. SVM-04031

Location Part

No. No.

01 43005144 Cabinet, Front
02 43005143 Cabinet, Side

04 43T42312 Base

05 43T00378 Plate, Packed, Valve
06 43T19314 Guard, Fan
07 43T19005 Handle
08 43T62007 Cover, E-Parts
09 43020302 Fan, Propeller
10 43T21335 Motor, Fan, AC 220 − 240V, 50Hz
11 43T47001 Nut, Flange
12 43T63004 Clamp, Lead Wire
13 43T96001 Bushing
14 Condenser Assembly

43T43310

Description

Location Part

No. No.

16 43T47020 Bonnet, 6.35Dia.
17 43T46318 Valve, Packed 12.7Dia.

18 43T47018 Bonnet, 12.7Dia
19 43T47014 Capillary Tube, 1.7Dia.

22 43T49008 Cushion, Rubber

24 43T55316 MF Capacitor (45µF 370V)
25 43T55318 MF Capacitor (2µF 450V)
26 43T60324 Terminal Block, 6P

27 43T41349 Compressor, 5KS225DAA
28 43T52302 Magnetic Contactor (CLK-26J)

36 43T43311 Sub Condenser
37 43T33002 Spark Killer

− 77 −

Description

15 43T46317 Valve, Packed 6.35Dia.

11-3. Outdoor Unit (RAS-24UAH-ES3)

FILE NO. SVM-04031-(1)

7

20

29

36

35

26

25

5

12, 14

4

37

11, 13

39

38

30

31

27

24

1

6

9

2

32

10

40

17

16

19

33, 34

15

8

3

9

28

18

21

23

22

Location Part

No. No.

01 43T00024 Panel, Air Outlet
02 43T00025 Panel, Front
03 43T00026 Panel, Side
04 43T42002 Base Assembly

05 43T19318 Guard, Fin

06 43T19011 Guard, Fan
07 43T91001 Plate, Roof
08 43T42005 Plate, Valve, Packed
09 43T15001 Handle
10 43T43307 Condenser Assembly
11 43T46318 Valve, Packed, 12.7Dia.
12 43T46317 Valve, Packed, 6.35Dia.
13 43T47018 Bonnet, 12.7Dia.
14 43T47020 Bonnet, 6.35Dia.
15 43T47013 Capillary Tube, 2.0Dia.
16 43T60324 Terminal Block, 6P
17 43T60325 Filter, Clamp
18 43T41310 Compressor, PA290X3F-4MS
19 43T62014 Protector, Cord
20 43T62015 Protector, Cord
21 43T49011 Base, Spring, A

Description

Location Part

No. No.

22 43T49012 Base, Spring, B
23 43T49019 Spring, Buffer

24 43T21315 Motor, Fan, AC 220 − 240V 50Hz

25 43T20301 Fan, Propeller, 491
26 43T96001 Bushing
27 43T96004 Bushing, Cord
28 43T62013 Cover, E-Parts

29 43T52301 Switch, Magnet, CLK-35J,
30 43T55316 MF Capacitor (45µF 370V)

31 43T55317 MF Capacitor (3.5µF 450V)

32 43T96003 Clip, Cable
33 43T46319 Valve, 4way

34 43T46310 Coil, V-4way AC 220 − 240V

35 43T69059 Sensor
36 43T69060 Sensor, TD
37 43T79305 Nipple, Drain
38 43T58301 Transformer, TT-05
39 43T69336 PC Board Assembly
40 43T47317 Nut, Flange

Description

− 78 −

11-5. Outdoor Unit (RAS-24UA-ES3)

FILE NO. SVM-04031

Location Part

No. No.

01 43T00024 Panel, Air Outlet
02 43T00025 Panel, Front
03 43T00026 Panel, Side

04 43T42307 Base Assembly
05 43T19318 Guard, Fin

06 43T19011 Guard, Fan
07 43T91001 Plate, Roof
08 43T42005 Plate, Valve, Packed
09 43T15001 Handle

10 43T43347 Condenser Assembly

11 43T46318 Valve, Packed 12.7Dia.
12 43T46317 Valve, Packed 6.35Dia.
13 43T47018 Bonnet, 12.7Dia.
14 43T47020 Bonnet, 6.35Dia.
15 43T47013 Capillary Tube, 2.0Dia.
16 43T60324 Terminal Block, 6P

18 Compressor, 5JS315DAG01

43T41350

Description

Location Part

No. No.

19 43T62014 Protector, Cord
20 43T62015 Protector, Cord

23
24 43T21314 Motor, Fan, AC 220 − 240V 50Hz

25 43T20301 Fan, Propeller, 491
26 43T96001 Bushing
27 43T96004 Bushing, Cord
28 43T62013 Cover, E-Parts

29 43T52301 Switch, Magnet, CLK-35J

30 43T55316 MF Capacitor (45µ F 370V)
31 43T55317 MF Capacitor (3.5µ F 450V)
32 43T96003 Clip, Cable
40 43T47317 Nut, Flange

43 43T33002 Spark-Killer

− 79 −

Description

43T49309 Rubber Cushion

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 –