Toshiba RAS-18UA-AS3, RAS-24UKP-AS3, RAS-24UAH-ES3, RAS-24UAH-AS3, RAS-18UAH-AS3 SERVICE MANUAL

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SERVICE MANUAL

AIR CONDITIONER

RAS-24UKHP-ES3 / RAS-24UAH-ES3

RAS-18UKHP-ES3 / RAS-18UAH-ES3

RAS-24UKP-ES3 / RAS-24UA-ES3

RAS-18UKP-ES3 / RAS-18UA-ES3

FILE NO. SVM-04007-(1)

SPLIT WALL TYPE

RAS-24UKHP-AS3 / RAS-24UAH-AS3 RAS-18UKHP-AS3 / RAS-18UAH-AS3

RAS-24UKP-AS3 / RAS-24UA-AS3

RAS-18UKP-AS3 / RAS-18UA-AS3

18 Class

(Heat pump model)

24 Class18 Class

(Cooling only model)

May 2004

FILE NO. SVM-04007-(1)

CONTENTS

1. SPECIFICATIONS

2. CONSTRUCTION VIEWS

2-1 Indoor Unit 2-2 Outdoor Unit (RAS-24UAH-ES3, RAS-24UA-ES3, RAS-24UAH-AS3, RAS-24UA-AS3) 2-3 Outdoor Unit (RAS-18UAH-ES3, RAS-18UAH-AS3) 2-4 Outdoor Unit (RAS-18UA-ES3, RAS-18UA-AS3)

3. WIRING DIAGRAM

3-1 RAS-24UKHP-ES3 / RAS-24UAH-ES3, RAS-24UKHP-AS3 / RAS-24UAH-AS3 3-2 RAS-18UKHP-ES3 / RAS-18UAH-ES3, RAS-18UKHP-AS3 / RAS-18UAH-AS3 3-3 RAS-24UKP-ES3 / RAS-24UA-ES3, RAS-24UKP-AS3 / RAS-24UA-AS3 3-4 RAS-18UKP-ES3 / RAS-18UA-ES3, RAS-18UKP-AS3 / RAS-18UA-AS3

4. SPECIFICATION OF ELECTRICAL PARTS

4-1 Indoor Unit (RAS-24UKHP-ES3, RAS-18UKHP-ES3, RAS-24UKHP-AS3, RAS-18UKHP-AS3) 4-2 Outdoor Unit (RAS-24UAH-ES3, RAS-24UAH-AS3) 4-3 Outdoor Unit (RAS-18UAH-ES3, RAS-18UAH-AS3) 4-4 Indoor Unit (RAS-24UKP-ES3, RAS-18UKP-ES3, RAS-24UKP-AS3, RAS-18UKP-AS3) 4-5 Outdoor Unit (RAS-24UA-ES3, RAS-24UA-AS3) 4-6 Outdoor Unit (RAS-18UA-ES3, RAS-18UA-AS3)

5. REFRIGERATION CYCLE DIAGRAM

5-1 RAS-24UKHP-ES3 / RAS-24UAH-ES3, RAS-24UKHP-AS3 / RAS-24UAH-AS3

5-2 RAS-18UKHP-ES3 / RAS-18UAH-ES3, RAS-18UKHP-AS3 / RAS-18UAH-AS3

5-3 RAS-24UKP-ES3 / RAS-24UA-ES3, RAS-24UKP-AS3 / RAS-24UA-AS3

5-4 RAS-18UKP-ES3 / RAS-18UA-ES3, RAS-18UKP-AS3 / RAS-18UA-AS3

6. CONTROL BLOCK DIAGRAM

6-1 RAS-24UKHP-ES3, RAS-18UKHP-ES3, RAS-24UKHP-AS3, RAS-18UKHP-AS3 6-2 RAS-24UKP-ES3, RAS-18UKP-ES3, RAS-24UKP-AS3, RAS-18UKP-AS3

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

7-9 Self-Cleaning function

8. INSTALLATION PROCEDURE

8-1 Safety Cautions 8-2 Installation Diagram of Indoor and Outdoor Units 8-3 Installation 8-4 Indoor Unit 8-5 Outdoor Unit 8-6 Others

- 1 -

FILE NO. SVM-04007

9. TROUBLESHOOTING CHART

9-1 Troubleshooting Procedure 9-2 Basic Check Items 9-3 Primary Judgement 9-4 Self-Diagnosis by Remote Control (Check Code) 9-5 How to Diagnose Faulty Part 9-6 Troubleshooting for Indoor Unit 9-7 Troubleshooting for Wiring (Interconnect cable and Serial Signal 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-24UAH-ES3, RAS-24UA-ES3, RAS-24UAH-AS3, RAS-24UA-AS3) 10-3 Outdoor Unit (RAS-18UAH-ES3, RAS-18UAH-AS3) 10-4 Outdoor Unit (RAS-18UA-ES3, RAS-18UA-AS3)

11. EXPLODED VIEWS AND PARTS LIST

11-1 Indoor Unit (E - Parts Assy) 11-2 Indoor Unit 11-3 Outdoor Unit (RAS-24UAH-ES3, RAS-24UAH-AS3) 11-4 Outdoor Unit (RAS-18UAH-ES3, RAS-18UAH-AS3) 11-5 Outdoor Unit (RAS-24UA-ES3, RAS-24UA-AS3) 11-6 Outdoor Unit (RAS-18UA-ES3, RAS-18UA-AS3)

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

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

- 2 -

1. SPECIFICATIONS

FILE NO. SVM-04007

MODEL

ITEM

Capacity

Phase 1∅

Power source V 220 - 240

Power consumption W 2430 2510 2400 2480 2560 2690 1850 1900 1648 1718 1860 1960

Power factor % 96 92 95 90 94 89 98 97 94 92 98 97

Running current A 0.3/ 0.3/

Indoor/Outdoor 11.2 11.1 8.4 8.0 7.9 7.7

Starting current A

Moisture removal lit/h 2.5 2.7 2.0 2.0

Noise

Refrigerant

Refrigerant control Capillary tube

Interconnection Connection type Flare connection

pipe Maximum length

INDOOR UNIT RAS-24UKHP-ES3 RAS-24UKP-ES3 RAS-18UKHP-ES3 RAS-18UKP-ES3

Dimensions Width mm 998

Net weight kg 12

Evaporator type Finned tube

Indoor fan type Cross flow fan

Air volume Medium fan m3/h 750 800 750 650 700 650

Fan motor output W 20

Air filter Honeycomb woven filter with PP frame

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

Dimensions Width mm 880 830 780

Net weight kg 69 63 50 41

Condenser type Finned tube

Outdoor fan type Propeller fan

Airflow volume m3/h 3380 3560 3380 3560 3380 3560 1800 2000 1800 2000 1800 2000

Fan motor output W 65 42

Compressor

Safety device IOL, Td Sensor IOL IOL, Td Sensor IOL

Louver type Automatic louver

Usable outdoor temperature range °C 15 ~ 43 -10 ~ 24 15 ~ 43 15 ~ 43 -10 ~ 24 15 ~ 43

Indoor (H/M/L) dB 45/41/37 42/39/35

Outdoor (220-240V) dB 56-57 57-58 56-57 51-52 52-53 51-52

Name of refrigerant R410A

Rated amount kg 1.6 1.3 1.2

Gas side size mm ∅12.7

Connection type Flare connection

Liquid side size mm ∅6.35

(One way) 25*

Maximum height

difference

Height mm 298

Depth mm 208

High fan m3/h 950 950 950 750 800 750

Low fan m3/h 600 650 600 530 570 530

Height mm 690 538

Depth mm 310 300

Model

Output W 2200 1500

RAS-24UKHP-ES3 RAS-24UKP-ES3 RAS-18UKHP-ES3 RAS-18UKP-ES3

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

Cooling Heating Cooling Cooling Heating Cooling

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

kW 6.30 6.30 6.80 6.90 6.80 6.85 5.00 5.05 5.45 5.55 5.30 5.35

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

0.3/11.2 0.3/12.1 0.3/12.35

m 8

PA290X3F-4MS

5JS315DAG01

0.2/ 0.2/ 0.2/ 0.2/

15*

PA225X3F-4L

0.2/8.5 0.2/8.3

20*

5KS225DAA

- 3 -

FILE NO. SVM-04007

MODEL

RAS-24UKHP-AS3 RAS-24UKP-AS3 RAS-18UKHP-AS3 RAS-18UKP-AS3

RAS-24UAH-AS3 RAS-24UA-AS3 RAS-18UAH-AS3 RAS-18UA-AS3

ITEM Cooling Heating Cooling Cooling Heating Cooling

Capacity

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

kW 6.30 6.30 6.80 6.90 6.80 6.85 5.00 5.05 5.45 5.55 5.30 5.35

Phase 1∅

Power source V 220 - 240

Hz 50

Power consumption W 2430 2510 2405 2500 2560 2690 1850 1900 1648 1718 1860 1960

Power factor % 96 92 95 91 94 89 98 97 94 92 98 97

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

Running current A 0.3/ 0.3/

Indoor/Outdoor 11.2 11.1 8.4 8.0 7.9 7.7

0.3/ 0.3/

11.2

11.20

Starting current A 45

0.3/12.9 0.3/12.35

0.2/ 0.2/ 0.2/ 0.2/

0.2/8.5 0.2/8.3

Moisture removal lit/h 2.5 2.7 2.0 2.0

Noise

Refrigerant

Indoor (H/M/L) dB 45/41/37 42/39/35

Outdoor (220-240V) dB 56-57 57-58 56-57 51-52 52-53 51-52

Name of refrigerant R410A

Rated amount kg 1.6 1.3 1.14

Refrigerant control Capillary tube

Gas side size mm ∅12.7

Connection type Flare connection

Liquid side size mm ∅6.35

Interconnection Connection type Flare connection

pipe Maximum length

(One way) 25*

Maximum height

difference

m 8

15*

20*

INDOOR UNIT RAS-24UKHP-AS3 RAS-24UKP-AS3 RAS-18UKHP-AS3 RAS-18UKP-AS3

Height mm 298

Dimensions Width mm 998

Depth mm 208

Net weight kg 12

Evaporator type Finned tube

Indoor fan type Cross flow fan

High fan m3/h 950 950 950 750 800 750

Air volume Medium fan m3/h 750 800 750 650 700 650

Low fan m3/h 600 650 600 530 570 530

Fan motor output W 30

Air filter Honeycomb woven filter with PP frame

OUTDOOR UNIT RAS-24UAH-AS3 RAS-24UA-AS3 RAS-18UAH-AS3 RAS-18UA-AS3

Height mm 690 538

Dimensions Width mm 880 830 780

Depth mm 310 300

Net weight kg 64 67 51 41

Condenser type Finned tube

Outdoor fan type Propeller fan

Airflow volume m3/h 3380 3560 3380 3560 3380 3560 1800 2000 1800 2000 1830 2010

Fan motor output W 65 41

Compressor

Model

PA290X3F-4MS

5JS315DAG01

Output W 2200 1500

PA225X3F-4L

5KS225DAA

Safety device IOL, Td Sensor IOL IOL, Td Sensor IOL

Louver type Automatic louver

Usable outdoor temperature range °C 15 ~ 43 -10 ~ 24 15 ~ 43 15 ~ 43 -10 ~ 24 15 ~ 43

– 4 –

Note : 1

· Capacity is based on the following temperature conditions.

FILE NO. SVM-04007

Condition

Temperature

Indoor unit inlet air temperature

Outdoor unit inlet air temperature

Note : 2

· Charge refrigerant according to the table below.

Refrigerant

No need to charge extra refrigerant

*2 Need to charge

extra refrigerant

RAS-24UKHP-ES3 / RAS-24UAH-ES3

RAS-24UKP-ES3 / RAS-24UA-ES3 RAS-18UKP-ES3 / RAS-18UA-ES3

RAS-24UKHP-AS3 / RAS-24UAH-AS3

RAS-24UKP-AS3 / RAS-24UA-AS3

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

(DB) 27°C 20°C

(WB) 19°C 15°C

(DB) 35°C 7°C

(WB) 24°C 6°C

15m or less

JIS C9612-1994

Cooling Heating

RAS-18UKHP-ES3 / RAS-18UAH-ES3

RAS-18UKHP-AS3 / RAS-18UA-AS3

RAS-18UKP-AS3 / RAS-18UA-AS3

15m or less

- 5 -

2-1. Indoor Unit

Back body

Front panel

Grille inlet

298

2. CONSTRUCTION VIEWS

998

FILE NO. SVM-04007

208

75 7

Knock out system

Outline of indoor unit

Connection pipe (0.39m) (Flare

55 or more

Minimum distance

to ceiling

298

∅

12.7)

763.5

998

450

Drain hose (0.54m)

Connection pipe (0.49m) Wireless remote control (Flare

∅

6.35)

(For stud bolt

Knock out system

∅

55 5555

160

∅

100

Installation Plate outline

100

– 6 –

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

RAS-24UAH-AS3, RAS-24UA-AS3)

∅

12X18

∅

600

600 or

-∅

for

600 or

anchor bolt

Electric

Parts cover

Liquid side

6.35)

∅

(Flare

Gas side

2.7)

∅1

(Flare

FILE NO. SVM-04007

Service Port

1212

Air inlet

340

Installation dimension

100 or

25 Drain outlet

∅

120

Air outlet

100 or

140

600

310

Handle

340 (pitch)

880

364

600

Detail Drawing

63.8 340

12x18 hole

∅

340

690

Handle

– 7 –

2-3. Outdoor Unit (RAS-18UAH-ES3, RAS-18UAH-AS3)

-∅

11x14

600 or more

600

Air inlet

∅

for

600 or

anchor bolt

Electric

6.35)

∅

Liquid side

(Flare

Parts cover

12.7)

∅

Gas side

(Flare

FILE NO. SVM-04007

Installation dimension

120

Air inlet

325

100 or more

Air

outlet

100 or more

6 holes

-∅

10 anchor bolt)

— ∅

11x14 holes

∅

(for fixing outdoor unit)

25 Drain outlet

∅

Service Port

344

600

830

R10

600

Detail Drawing

325

6 hole

∅

11x14 hole

∅

Fan guard

Handle

420

∅

538

300

– 8 –

2-4. Outdoor Unit (RAS-18UA-ES3, RAS-18UA-AS3)

-∅

11x14

∅

anchor bolt

600 or more

FILE NO. SVM-04007

600 or

325

100 or more

600

Air inlet

Installation dimension

Air inlet

100 or more

Air

outlet

Electric parts cover

6 hole

-∅

(for fixing outdoor unit)

6.35)

∅

Gas side

Liquid side

(Flare

12.7)

∅

(Flare

Service

Port

130

100

344

65.5

9090

120

600

Detail Drawing

R10

52.5 325

∅6 hole

301

325

11x14 hole

∅

4-∅11x14 hole

(for Ø8-Ø10 anchor bolt)

25Drain outlet

∅

420

∅

Fan guard

538

Handle

600

300

780

– 9 –

FILE NO. SVM-04007

3. WIRING DIAGRAM

3-1. RAS-24UKHP-ES3 / RAS-24UAH-ES3 , RAS-24UKHP-AS3 / RAS-24UAH-AS3

COLOR IDENTIFICATION

BROWN

BLK WHI RED

GRN&YEL

CN31 CN30

CN23

BLK P04

GRN&YEL

SG01 DSA

BRW

RED

WHI

YEL

BLU

BLK

GRY

PNK

ORN

GRN

R22

VARISTOR

T6. 3A 250V

F01 FUSE

RED WHITE YELLOW BLUE BLACK GRAY PINK ORANGE GREEN &YELLOW GREEN

R09

R21

LOUVER MOTOR

BLU

6 6

IC04

L01

R01

DB01

C15

C01

MAIN P.C. BOARD

(MCC-821)

CN13

7 8 9 10

BLU

5 5

7 8 9 10

BLU

INFRARED RAYS RECEIVE AND INDICATION PARTS

PNK

5 5

CN 07

WHI

YEL

4 4

CN25

FAN MOTOR

DC MOTOR

ORN

RED

BRW

CN 10

C02

C06

IC01

CN03 CN01

THERMO

BLK

SENSOR

(TA)

4 4

T01

3 3

1 1

BLK

1 1

IC02

2 2

BLK

EXCHANGER

SENSOR

DC15V DC0V

DC12V DC7V

DC0V

HEAT

(TC)

OUTDOOR TERMINAL BLOCK

COMPRESSOR TERMINAL

POWER SUPPLY 220-240 V~ 50 Hz

BLK

RED

BLK

RED

WHI PNK

COMPRESSOR

INDOOR TERMINAL BLOCK

FERRITE CORE

RED

MAGNETIC

CONTACTOR

(1/L1) (2/T1)

CAPACITOR

GRN&YEL

BLK

(5/L3) (6/T3)

52C

(3/L2) (4/T2)

RED

WHI RE

CHASSIS

CAPACITOR

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

1 2

1 313

11 33

MAIN P.C. BOARD (MCC-890)

CN06

CN05

TNR

SG01

R74

F01

250VAC T6. 3A

CN01

RY07

CN11

CR11

RY05

CN02

CR12

CR13

CN03

1 1

BLK

TNR R73

RY06

CN07

CN08

DISCHARGE PIPE SENSOR (TD)

BLU

1 2 3

BLU

BLK

2 3

BLK

HEA

EXCHANGER SENSOR (TE)

– 10 –

FILE NO. SVM-04007

3-2. RAS-18UKHP-ES3 / RAS-18UAH-ES3, RAS-18UKHP-AS3 / RAS-18UAH-AS3

COLOR IDENTIFICATION

BROWN

BLK WHI RED

GRN&YEL

CN31 CN30

CN23

BLK P04

GRN&YEL

SG01 DSA

BRW

RED

WHI

YEL

BLU

BLK

GRY

PNK

ORN

GRN

R22

VARISTOR

T6. 3A 250V

F01 FUSE

RED WHITE YELLOW BLUE BLACK GRAY PINK ORANGE GREEN &YELLOW GREEN

R09

R21

LOUVER MOTOR

BLU

6 6

IC04

L01

R01

DB01

C15

C01

MAIN P.C. BOARD

(MCC-821)

CN13

7 8 9 10

BLU

5 5

7 8 9 10

BLU

INFRARED RAYS RECEIVE AND INDICATION PARTS

PNK

5 5

CN 07

WHI

YEL

4 4

CN25

FAN MOTOR

DC MOTOR

ORN

RED

BRW

CN 10

C02

C06

IC01

CN03 CN01

THERMO

BLK

SENSOR

(TA)

4 4

T01

3 3

1 1

BLK

1 1

IC02

2 2

BLK

EXCHANGER

SENSOR

DC15V DC0V

DC12V DC7V

DC0V

HEAT

(TC)

OUTDOOR TERMINAL BLOCK

COMPRESSOR TERMINAL

POWER SUPPLY 220-240 V~ 50 Hz

BLK

RED

BLK

RED

WHI PNK

COMPRESSOR

INDOOR TERMINAL BLOCK

FERRITE CORE

RED

MAGNETIC

CONTACTOR

CAPACITOR

GRN&YEL

52C

BLK

RED

WHI RE

CHASSIS

CAPACITOR

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

1 2

1 313

11 33

MAIN P.C. BOARD (MCC-890)

CN06

CN05

TNR

SG01

R74

F01

250VAC T6. 3A

CN01

RY07

CN11

CR11

RY05

CN02

CR12

CR13

CN03

1 1

BLK

TNR R73

RY06

CN07

CN08

DISCHARGE PIPE SENSOR (TD)

BLU

1 2 3

BLU

BLK

2 3

BLK

HEA

EXCHANGER SENSOR (TE)

– 11 –

3-3. RAS-24UKP-ES3 / RAS-24UA-ES3

COLOR IDENTIFICATION

GRN&YEL

BLK

P04

SG01 DSA

CN27

CN30

CN31

BLK WHI RED

GRN&YEL

BRW

RED

WHI

YEL

BLU

BLK

GRY

PNK

ORN

: :

R22

VARISTOR

T6.3A 250 V

F01 FUSE

BROWN RED WHITE YELLOW BLUE BLACK GRAY PINK ORANGE GREEN & GREENGRN

RY04

YELLOW

R09

R21

LOUVER MOTOR

BLU

6 6

IC04

L01

R01

DB01

C15

C01

MAIN P.C. BOARD

(MCC-821)

CN13

7 8 9

BLU

INFRARED RAYS RECEIVE AND INDICATION PARTS

BLU

7 8 9

FILE NO. SVM-04007

FAN MOTOR

DC MOTOR

ORN

PNK

YEL

RED

BRW

1 1

C02

2 2

BLK

CN 10

C06

IC01

THERMO SENSOR

(TA)

4 4

T01

3 3

1 1

BLK

2 2

1 1

IC02

BLK

EXCHANGER

SENSOR

CN 07

CN03 CN01

10 10

WHI

CN25

1 1

BLK

DC15V

DC0V DC12V

DC7V

DC0V

HEAT

(TC)

OUTDOOR TERMINAL BLOCK

INDOOR TERMINAL BLOCK

POWER SUPPLY 220 − 240 V ~ 50 Hz

BLK

RED

BLK

RED

MAGNETIC CONTACTOR

BLK BLK

SPARK KILLER

A1 A2

52C

R U

GRN&YEL

RED

CAPACITOR

GRY

CHASSIS

RED

WHI PNK

COMPRESSOR

INDOOR UNIT

OUTDOOR UNIT

CAPACITOR

WHI RED

BLK

COMPRESSOR TERMINAL

BLK

FAN MOTOR

− 12 −

FILE NO. SVM-04007

3-4. RAS-18UKP-ES3 / RAS-18UA-ES3, RAS-18UKP-AS3 / RAS-18UA-AS3

COLOR IDENTIFICATION

BROWN

BLK WHI RED

GRN&YEL

CN30

CN31

CN27

BLK

P04

GRN&YEL

SG01 DSA

BRW

RED

WHI YEL BLU

BLK GRY PNK

ORN

R22

VARISTOR

T6.3A 250 V

F01 FUSE

RED

WHITE

YELLOW

BLUE

BLACK

GRAY

PINK

ORANGE GREEN &

GREENGRN

YELLOW

RY04

R09

R21

LOUVER MOTOR

BLU

6 6

IC04

L01

R01

DB01

C15

C01

MAIN P.C. BOARD

(MCC-821)

CN13

7 8 9

BLU

INFRARED RAYS RECEIVE AND INDICATION PARTS

BLU

7 8 9

PNK

5 5

CN 07

10 10

WHI

10 10

YEL

4 4

CN25

FAN MOTOR

DC MOTOR

RED

BRW

ORN

CN03 CN01

1 1

BLK

1 1

C02

2 2

BLK

6 6

CN 10

IC01

THERMO SENSOR

(TA)

5 5

C06

4 4

T01

3 3

1 1

BLK

1 1

IC02

2 2

BLK

EXCHANGER

SENSOR

DC15V

DC0V DC12V

DC7V

DC0V

HEAT

(TC)

OUTDOOR TERMINAL BLOCK

RED

WHI PNK

POWER SUPPLY 220 − 240 V ~ 50 Hz

BLK

MAGNETIC

CONTACTOR

CAPACITOR

COMPRESSOR

INDOOR TERMINAL BLOCK

BLK

RED

GRN&YEL

RED

BLK

CHASSIS

GRN&YEL

INDOOR UNIT

OUTDOOR UNIT

SPARK KILLER

GRY

(or A)

(or B)

CAPACITOR

RED

BLK

WHI

RED

BLK

FAN MOTOR

COMPRESSOR TERMINAL

− 13 −

3-5. RAS-24UKP-AS3 / RAS-24UA-AS3

COLOR IDENTIFICATION

BRW

RED

WHI YEL BLU BLK

GRY

PNK

ORN

GRN&YEL

SG01

DSA

R22

VARISTOR

T6.3A 250 V

F01 FUSE

BLK WHI RED

GRN&YEL

CN27

BLK

P04

CN30

CN31

BROWN

RED

WHITE

YELLOW

BLUE

BLACK GRAY

PINK

ORANGE

GREEN &

: :

GREENGRN

RY04

YELLOW

R09

R21

LOUVER MOTOR

BLU

6 6

IC04

L01

R01

DB01

C15

C01

MAIN P.C. BOARD

(MCC-821)

CN13

7 8 9

BLU

INFRARED RAYS RECEIVE AND INDICATION PARTS

BLU

7 8 9

FILE NO. SVM-04007

FAN MOTOR

DC MOTOR

ORN

PNK

YEL

RED

BRW

1 1

C02

2 2

BLK

CN 10

C06

IC01

THERMO

SENSOR

(TA)

4 4

T01

3 3

1 1

BLK

2 2

1 1

IC02

BLK

EXCHANGER

SENSOR

DC15V

DC0V DC12V

DC7V

DC0V

HEAT

CN 07

CN03 CN01

WHI

BLK

CN25

(TC)

OUTDOOR TERMINAL BLOCK

INDOOR TERMINAL BLOCK

POWER SUPPLY 220

−

240 V ~ 50 Hz

BLK

RED

BLK

RED

BLK BLK

RED

MAGNETIC CONTACTOR

SPARK KILLER

A1 A2

52C

R U

GRN&YEL

RED

ELECTRIC STARTER

RED

CAPACITOR

GRY

CHASSIS

WHI

STARTING CAPACITOR

WHI

RED

WHI PNK

INDOOR UNIT

OUTDOOR UNIT

CAPACITOR

COMPRESSOR

WHI

RED

FAN MOTOR

BLK

COMPRESSOR TERMINAL

BLK

− 14 −

FILE NO. SVM-04007

4. SPECIFICATION OF ELECTRICAL PARTS

4-1. Indoor Unit (RAS-24UKHP-ES3, RAS-18UKHP-ES3, RAS-24UKHP-AS3, RAS-18UKHP-AS3)

No. Parts name Type Specifications

1 Fan motor (for indoor) ICF-340-30-2 DC 340V, 30W 2 Thermo sensor (TA-sensor) ——— 10kΩ at 25°C 3 DC-DC transformer (T01) SWT-58A DC 390V, Secondary DC 15V, 12V, 7V 4 Microcontroller TMP87CM40AN 5 Heat exchanger sensor

(TC-sensor) 6 Line filter (L01) SS11V-R07190 19mH, AC 0.7A 7 Diode (DB01) D3SBA60 4A, 600V 8 Capacitor (C02) KMH450VNSN120M25C 120 µF, 450V 9 Fuse (F01) TSCR T6.3A, 250V

10 Power supply IC (IC01) MA8920 5A, 900V 11 Varistor (R21, R22) 15G561K 560V 12 Resistor (R01) RF-5TK4R7B 4.7Ω, 5W 13 Louver motor MP35EA12 Output (Rated) 2W, 10poles, 4phase,

——— 10kΩ at 25°C

DC 12V

4-2. Outdoor Unit (RAS-24UAH-ES3, RAS-24UAH-AS3)

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, 1 phase, 220 – 240V, 50Hz

2 Fan motor (for outdoor) KFG6-71SB5P-T1 Winding resistance (Ω) Red-Black White-Black

(at 20°C) 64.4 127.4

Running capacitor

(for fan motor)

Running capacitor

(for compressor)

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 Microcontroller TMP47C840N

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

451355KQ AC 450V, 3.5µF

371456JCR AC 370V, 45µF

VHV (STF) AC 220 ~ 240V

– 15 –

FILE NO. SVM-04007

4-3. Outdoor Unit (RAS-18UAH-ES3, RAS-18UAH-AS3)

No. Parts name Type Specifications

Output (Rated) 1500W, 2poles, 1 phase, 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, 1 phase, 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

(for fan motor)

Running capacitor

(for compressor)

Solenoid coil

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

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

451205KQ AC 450V, 2 µF

371456JCR AC 370V, 45µF

VHV (STF) AC 220 − 240V

4-4. Indoor Unit (RAS-24UKP-ES3, RAS-18UKP-ES3, RAS-24UKP-AS3, RAS-18UKP-AS3)

No. Parts name Type Specifications

(TC-sensor) 6 Line filter (L01) SS11V-R07190 19mH, AC 0.7A 7 Diode (DB01) D3SBA60 4A, 600V 8 Capacitor (C02) KMH450VNSN120M25S 1 20µF, 450V 9 Fuse (F01) TSCR T6.3A, 250V

10 Relay (for outdoor fan motor,

solenoid coil) (RY04)

11 Power supply IC (IC01) MA8920 5A, 900V 12 Varistor (R21, R22) 15G561K 560V 13 Resistor (R01) RF-5TK4R7B 4.7Ω, 5W 14 Louver motor MP35EA12 Output (Rated) 2W,10poles, 4phase,

——— 10kΩ at 25°C

AJQ1341 Coil DC 12V, 33mA, Rated 1A, AC 250V

DC 12V

– 16 –

FILE NO. SVM-04007-(1)

4-5. Outdoor Unit (RAS-24UA-ES3, RAS-24UA-AS3)

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)

Starting capacitor

(for compressor)

(RAS-24UA-AS3)

451355KQ AC 450V, 3.5µ F

371456JCR AC 370V, 45µ F

371456JCR

AC 370V, 45µF

6 Magnetic contactor

7 Electric starter

CLK-35J

ZPR0YCE101A500

220 − 240V, 50Hz

AC 500V, 100Ω

4-6. Outdoor Unit (RAS-18UA-ES3, RAS-18UA-AS3)

No. Parts name Type Specifications

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

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

(at 20°C ) 1. 632 2.457

Output (Rated) 42W, 6poles, 1 phase, 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

(for fan motor)

Running capacitor 4

(for compressor)

Magnetic contactor

451205KQ AC 450V, 2µF

371456JCR AC 370V, 45µF

CLK-26J

220 − 240V, 50Hz

– 17 –

5. REFRIGERATION CYCLE DIAGRAM

5-1. RAS-24UKHP-ES3 / RAS-24UAH-ES3

RAS-24UKHP-AS3 / RAS-24UAH-AS3

FILE NO. SVM-04007

0.49m (Connecting pipe)

12.7

∅

O.D.:12.7mm

Cooling

Heating

Tank

Indoor unit

Cooling

Heating

Packed valve

(∅

12.7)

Gas container connection (Reinstall etc.)

Heating

4-way valve

Cooling

Compressor

PA290X3F-4MS

Heat exchanger

Cross flow fan

Packed valve

(∅

6.35)

Capillary tube

2.0x700

∅

0.39m (Connecting pipe)

6.35

∅

O.D.:6.35mm

Condenser

Refrigerant R410A 1.6 kg

)means check points of Gas Leak.

Cooling Heating

Propeller fan

Outdoor unit

Mark(

Ambient temp.

50Hz

Standard

pressure

(MPaG)

Surface temp. of heat

exchanger interchanging

pipe

(°C)

Fan speed

(indoor)

conditions DB/WB

(°C)

Indoor Outdoor

Standard 2.7 43.0 High 20/– 7/6

Heating Overload*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 Overload 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 operation, a value for the high temperature limit control operation is included.

– 18 –

5-2. RAS-18UKHP-ES3 / RAS-18UAH-ES3

RAS-18UKHP-AS3 / RAS-18UAH-AS3

FILE NO. SVM-04007

0.39m (Connecting pipe)

∅

12.7

O.D.:12.7mm

Cooling

Heating

Indoor unit

Cooling

Heating

Packed valve

(

∅

Heating

4-way valve

Cooling

Compressor

12.7)

PA225X3F-4L

Accumulator

Condenser

Evaporator

Cross flow fan

Capillary tube

1.7x700

∅

Packed valve

∅

6.35)

(

Capillary tube

∅

1.0x1500

0.49m (Connecting pipe)

∅

6.35

O.D.:6.35mm

Refrigerant R410A 1.3 kg

)means check points of Gas Leak.

Cooling Heating

Propeller fan Outdoor unit

Mark(

Ambient temp.

50Hz

Standard

pressure

(MPaG)

Surface temp. of heat

exchanger interchanging

pipe

(°C)

Fan speed

(indoor)

conditions DB/WB

(°C)

Indoor Outdoor

Standard 2.7 45.0 High 20/– 7/6

Heating Overload*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 Overload 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 operation, a value for the high temperature limit control operation is included.

– 19 –

5-3. RAS-24UKP-ES3 / RAS-24UA-ES3

RAS-24UKP-AS3 / RAS-24UA-AS3

FILE NO. SVM-04007

0.49m (Connecting pipe)

12.7

∅

O.D.:12.7mm

Cooling

Tank

Indoor unit

Cooling

Packed valve

(∅

12.7)

Gas container connection (Reinstall etc.)

Cooling

Compressor

5JS315DAG01

Heat exchanger

Cross flow fan

Packed valve

∅

6.35)

(

Capillary tube

2.0x700

∅

0.39m (Connecting pipe)

∅

6.35

O.D.:6.35mm

Condenser

Refrigerant R410A 1.6kg

)means check points of Gas Leak.

Cooling

Propeller fan

Outdoor unit

Mark(

Ambient temp.

50Hz

Standard

pressure

(MPaG)

Surface temp. of heat

exchanger interchanging

pipe

(° C)

Fan speed

(indoor)

conditions DB/WB

(° C)

Indoor Outdoor

Standard 0.9 6.0 High 27/19 35/24

Cooling Overload 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)

– 20 –

5-4. RAS-18UKP-ES3 / RAS-18UA-ES3

RAS-18UKP-AS3 / RAS-18UA-AS3

FILE NO. SVM-04007

0.39m (Connecting pipe)

∅

12.7

O.D.:12.7mm

Cooling

Indoor unit

Cooling

Packed valve

Cooling

(

∅

12.7)

Compressor

5KS225DAA

Evaporator

Cross flow fan

Packed valve

∅

6.35)

(

Capillary tube

1.7x600

∅

0.49m (Connecting pipe)

∅

6.35

O.D.:6.35mm

Condenser

Cooling

Propeller fan Outdoor unit

Mark(

Refrigerant R410A 1.

)means check points of Gas Leak.

14 kg

Ambient temp.

50Hz

Standard

pressure

(MPaG)

Surface temp. of heat

exchanger interchanging

pipe

(°C)

Fan speed

(indoor)

conditions DB/WB

(°C)

Indoor Outdoor

Standard 0.9 10.0 High 27/19 35/24

Cooling Overload 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)

– 21 –

FILE NO. SVM-04007

6. CONTROL BLOCK DIAGRAM

6-1. RAS-24UKHP-ES3, RAS-18UKHP-ES3 / RAS-24UKHP-AS3, RAS-18UKHP-AS3

Indoor Unit Control Panel

M.C.U.

Heat Exchanger Sensor

Functions

•

Louver Control

Operation

Display

Temperature Sensor

Infrared Rays Signal Receiver

Infrared

Rays

Remote Control

From Outdoor Unit

220 ~ 240V AC 50Hz

Initiallizing Circuit

Clock Frequency Oscillator Circuit

Power Supply

Circuit

Noise Filter

•

3-minute Delay at Restart for Compressor

•

Motor Revolution Control

•

20 sec Self Cleaning Function

•

Processing

(Temperature Processing)

•

Timer

•

Serial Signal Communication

Louver ON/OFF Signal

Louver Driver

Serial Signal Transmitter/Receiver

Serial Signal Communication

Timer

Display

Filter Sign

Display

PRE DEF.

Sign Display

Hi Power

Sign Display

Indoor

Fan Motor

Louver Motor

REMOTE CONTROL

Infrared Rays

Remote Control

Operation (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

– 22 –

FILE NO. SVM-04007

6-2. RAS-24UKP-ES3, RAS-18UKP-ES3 / RAS-24UKP-AS3, RAS-18UKP-AS3

Indoor Unit Control Panel

M.C.U.

Heat Exchanger Sensor

Functions

 Louver Control

Operation

Display

Temperature Sensor

Infrared Rays Signal Receiver

Infrared

Rays

Remote

Control

From Outdoor Unit

220 ~ 240V AC 50Hz

Initiallizing Circuit

Clock Frequency

Oscillator Circuit

Power Supply

Circuit

Noise Filter

 3-minute Delay at Restart for Compressor

 Motor Revolution Control

20 sec Self Cleaning function

 Processing

(Temperature Processing)

 Timer

Outdoor unit

ON/OFF Signal

Relay Driver

Relay RY04

Outdoor Unit

Louver ON/OFF Signal

Louver Driver

Timer

Display

Filter Sign

Display

Fan Only

Sign Display

Hi Power

Sign Display

Indoor

Fan Motor

Louver Motor

REMOTE CONTROL

Infrared Rays

Remote Control

Operation (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

− 23 −

7. OPERATION DESCRIPTION

FILE NO. SVM-04007

7-1. Outline of Air Conditioner Control

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

(1) Role of indoor unit controller

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

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

temperature sensor

· Temperature setting of the indoor heat

exchanger by the heat exchanger sensor

· Louver motor control

· Indoor fan motor operation control

· LED display control

· T ransferring of operation commands to the

outdoor unit

· Receiving of information of the operation status

and judging of the information or indication of

error

(2) Role of outdoor unit controller

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

· Compressor operation

control

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

· when the outdoor unit receives the shutdown command

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

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 [FIX] button is pressed, it stops swinging.

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

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

change DC 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-24UKHP-ES3 RAS-24UKHP-AS3

MODEL

Cooling HIGH 1350 950 1150 750

and MED 1150 750 1050 650

Fan only LOW 1000 600 900 530

Heating MED 1200 800 1100 700

MODEL

Cooling HIGH 1350 950 1150 750

and MED 1150 750 1050 650

Fan only LOW 1000 600 900 530

Motor speed Air flow level Motor speed Air flow level

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

HIGH 1350 950 1200 800

LOW 1050 650 950 570

RAS-24UKP-ES3 RAS-18UKP-ES3 RAS-24UKP-AS3

LOW+=

MED+=

LOW+MED

MED+HIGH

RAS-18UKHP-ES3

RAS-18UKHP-AS3

RAS-18UKP-AS3

– 24 –

FILE NO. SVM-04007

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 microcomputer 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 HIGH, the motor operates with a constant air flow.

, MED, MED+ or

7-2-2. Cooling operation

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

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

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

ON ON

OFF ON OFF OFF ON

Compressor

4-way valve

(Heat pump model)

Common relay

Preset temp.

0.5

Fig. 7-2-2

Outdoor fan

display lamp

OPERATION

+2.5

(Preset temp.)

+1.5

+0.5

(Room temp.)

Preset temp.

(Preset temp.: 24°C)

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

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

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

(2) ECO operation cannot be set.

M+

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

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

, MED, MED+ or

HIGH, the motor operates with a constant air flow.

(Preset temp.)

(Room temp.)

Preset temp.

+2.5

+1.5

+0.5

-0.5

M+

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]

- 25 -

FILE NO. SVM-04007

7-2-3. Dry operation

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

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

operation display lamp are controlled as shown in Fig. 7-2-4.

ON:6min.

OFF:4min.

ON:5min.

OFF:5min.

OFF

Compressor

OFF

4-way valve

Common relay

Preset temp.

Fig. 7-2-4

ON:6min.

OFF:4min.

ON:5min.

OFF:5min.

Outdoor fan

display lamp

OPERATION

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

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

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

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

Preset temp.

ON ON

OFF

Compressor

OFF

4-way valve

Common relay

Fig. 7-2-6

display lamp

Outdoor fan

OPERATION

(2) The microprocessor turns the compressor on and

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

Room temp.

Preset temp.+1

Preset temp.

Compressor

Outdoor fan

Indoor fan

ON ON ON ON

OFF OFF OFF

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

*Super Low

Fig. 7-2-5

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

only.

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

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

, MED, MED+ or

HIGH, the motor operates with a constant air flow.

Preset temp.

-0.5

-1

-1.5

-2

-5.0

-5.5

[FAN AUTO]

*1 *2

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

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

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

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

- 26 -

FILE NO. SVM-04007

(3) The indoor heat exchanger restricts revolving

speed of the fan motor to prevent a cold draft. The upper limit of the revolving speed is shown in Fig. 7-2-8 and Table 7-2-1.

Manual (One of

AUTO

SUL*

SUL*1 Stop

5 steps)

L-H (Up to setting

speed)

A+4 A+4

A-8 A-8

464534

33 21 32 20

*6 *5

NOTES :

*1: The fan stops for 2 minutes after thermostat-OFF.

*2: A is 24°C when the preset temperature is 24°C or

more and A is the preset temperature when it is under 24°C.

*3: SUL means Super Ultra Low.

*4: Calculated from difference in motor speed

between SUL and HIGH.

7-2-5. Automatic operation

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

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

is selected according to difference between the preset temperature and the room temperature at which the automatic operation has started, as shown in Fig. 7-2-9. The Fan only operation continues until the room temperature reaches a level at which another mode is selected.

(2) Temporary Auto

When the TEMPORARY button on the indoor unit

is pushed, the preset temperature is fixed at 24°C

and the indoor unit is controlled as shown in Fig. 7-2-9.

Cooling operation

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

Cooling operation

Fan only operation

Fig. 7-2-8 Cold draft preventing control

*5 and *6:

Table 7-2-1

Fan *5 *6 speed Starting period Stabilized period

AUTO • Up until 12 minutes

passed after starting the unit

• From 12 to 25 minutes

passed after starting the unit and room temperature is 3°C lower than preset temperature

Manual • Room temperature

(L - H) < Preset temperature

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

• 25 minutes or more

passed after starting the unit

• Room temperature

Preset temperature

-4°C

-3.5°C

Heating operation

RAS-24UKHP-ES3

(Room temp.) - (Preset temp.)

RAS-18UKHP-ES3

RAS-24UKHP-AS3 RAS-18UKHP-AS3

RAS-24UKP-ES3 RAS-18UKP-ES3 RAS-24UKP-AS3

RAS-18UKP-AS3

Fig. 7-2-9

- 27 -

FILE NO. SVM-04007

55 52

Compressor

Outdoor fan

OFF

Heat exchanger temp.

7-3. Hi POWER Mode

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

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

(1) Automatic operation

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

(2) Cooling operation

· The preset temperature drops 1°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

*Heat pump model only

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

Fig. 7-4-1

7-5. Low-Temperature Limit Control

The microcontroller detects the indoor heat exchanger temperature to prevent the indoor heat exchanger from freezing.

· The compressor and outdoor fan motor are controlled as shown in Fig. 7-5-1.

Heat exchanger temperature

Compressor Outdoor fan

Less than continues

for 5 minutes

OFF

(3) Heating operation *Heat pump 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. Defrost Operation *Heat pump 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.

- 28 -

FILE NO. SVM-04007

7-7. Auto Restart Function

The indoor unit is equipped with an automatic restarting function which allows the unit to restart operating with the set operating conditions in the event of power supply being accidentally shut down. The operation will resume without warning three minutes after power is restored. This function is not set to work when shipped from the factory. Therefore it is necessary to set it to work.

7-7-1. How to set auto restart function

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

When the unit is on standby (Not operating)

Operation Motions

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

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

→

After approx. three seconds,

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

TEMPORARY button

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

When the unit is in operation

Operation Motions

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

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

→

After approx. three seconds,

TEMPORARY button

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

• This function can not be set if the timer operation

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

has been selected.

• When the unit is turned on by this function, the louver will not swing even though it was swinging automatically before shutting down.

– 29 –

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

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

When the unit is on standby (Not operating)

Operation Motions

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

→

FILE NO. SVM-04007

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

→

After approx. three seconds,

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

TEMPORARY button

If the unit is not required to operate at this time, push [TEMPORARY] 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,

TEMPORARY button

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

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

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

7-8. Filter Check Lamp

operation, the orange lamp is on.

When the elapsed time reaches 1000 hours, the filter

7-7-3. Power failure during timer operation

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

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

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

cancelled. Therefore, set the timer operation again.

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

Note:

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

– 30 –

play

(

)

g Op

(

)

FILE NO. SVM-04007-(1)

7-9. Self-Cleaning function.

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

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

Operation display

FCU fan

FCU louver OPEN CLOSE CLOSE

Timer display

Compressor

CDU fan

rpm is depend on preseting. rpm is SUL speed.

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

depend on preseting per room temperature.

Cool mode or dry mode Self-Cleaning mode

operation more than 10 mins. operate 20 mins.

ON OFF OFF

ON ON

ON or OFF

Turn off by remote controller

or timer-off function.

OFF OFF

Automatically turn-off.

ON or OFF

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

• Self-Cleaning operation can stop manually by press START/STOP botton of the remote control one more time.

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

To cancel the Self-Cleanin

Press TEMPORARY button one time or use remote control to

•

function, proceed as follows:

function

turn on air conditioner. The OPERATION dis oran

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

When AUTO-RESTART is OFF).

Hold down the TEMPORARY button for more than 20 seconds.

•

The air conditioner will stop suddenly when the TEMPORARY is

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

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

After holdin

•

times without an

The Self-Cleanin

•

about 20 seconds, the air conditioner will beep 5

blinking of display.

eration had been concelled.

OFF

Operation time

will show in

function

Remarks

Per settin

•

of Self-Cleaning function above, AUTO-RESTART

function had been cancelled. To set AUTO-RESTART a

lease follow item 7-7-1.

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

To set the Self-Cleanin

Press TEMPORARY button one time or use remote control to

•

function, proceed as follows.

turn on air conditioner. The OPERATION displa

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

oran

function.

will show in

When AUTO-RESTART is OFF).

Hold down the TEMPORARY button for more than 20 seconds.

•

The air conditioner will stop suddenly when the TEMPORARY is

pressed but keep holdin

it continue. Then will beep 3 times is

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

After holdin

•

5 times and OPERATION displa

The Self-Cleanin

•

about 20 seconds, the air conditioner will beep

blinks 5 times.

function had been set.

Remarks

Per settin

•

of Self-Cleaning function above, AUTO-RESTART

function had been cancelled. To set AUTO-RESTART a

lease follow item 7-7-1.

- 30-(1) -

ain,

function

ain,

8. INSTALLATION PROCEDURE

8-1. Safety Cautions

For general public use

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

FILE NO. SVM-04007

(H07RN-F or 245 IEC66 : polychloroprene

CAUTION

•

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

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

CAUTION

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

New Refrigerant Air conditioner Installation

To Disconnect the Appliance from the Main Power Supply.

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

– 31 –

FILE NO. SVM-04007

DANGER

• FOR USE BY QUALIFIED PERSONS ONLY.

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

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

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

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

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

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

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

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

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

WARNING

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

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

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

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

CAUTION

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

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

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

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

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

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

tions for proper installation.

REQUIREMENT OF REPORT TO THE LOCAL POWER SUPPLIER

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

Remark per EMC Directive 89/336/EEC

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

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

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

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

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

– 32 –

8-2. Installation Diagram of Indoor and Outdoor Units

FILE NO. SVM-04007

(Attach to the front panel) (Attach to the air filter)

Before installing the wireless remote control

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

2 Wireless remote control

7 Bioenzyme filter

6 Zeolite filter

5 Filter frame

170 mm

or more

Hook

Air filter

9 Pan head wood screw

4 Remote control holder

65 mm or more

Hook

1 Installation

plate

170 mm

or more

Shield pipe

For the rear left and left piping

Wall

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

Do not allow the drain hose to get slack.

Cut the piping hole sloped slightly

Make sure to run the drain hose sloped downward.

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

Cover

2 Wireless remote control

3 Batteries

Extension drain hose (Option: RB–821SW)

100 mm or more

100 mm

or more

mm or more

18 Class

Heat pump

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

600 mm or more

Electric parts cover

600 mm

or more

Cooling only

600 mm

or more

Vinyl tape Apply after carrying out a drainage test

Saddle

Extension

100 mm or more

100 mm

or more

600 mm or more

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

600 mm or more

24 Class18 Class

drain hose (Option: RB–821SW)

Electric parts cover

600 mm

or more

Right

Rear

Bottom

Rear left

Insulate the refrigerant

pipes separately with insulation, not together.

6 mm thick heat resisting polyethylene foam

Left

– 33 –

8-3. Installation

8-3-1. Optional installation parts

FILE NO. SVM-04007

Part

Code

Refrigerant piping Liquid side : ∅6.35 mm Gas side : ∅12.7 mm

Pipe insulating material (polyethylene foam, 6 mm thick)

Putty, PVC tapes

Parts name

Q'ty

One

each

One

each

<Fixing bolt arrangement of outdoor unit> RAS-24UA-ES3,RAS-24UAH-ES3, RAS-24UA-AS3, RAS-24UAH-AS3

600 mm

Air inlet

120 mm

64 mm

340 mm

Air outlet

Drain outlet

Fig. 8-3-1

RAS-18UAH-ES3, RAS-18UAH-AS3 RAS-18UA-ES3, RAS-18UA-AS3

325 mm

52 mm

Air outlet

600 mm

Air inlet

120 mm

325 mm

52 mm

Air outlet

600 mm

Air inlet

120 mm

Air outlet

Fig. 8-3-2 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 Š to the bottom plate of the outdoor unit

•

before installing it.

– 34 –

8-3-2. Accessory and installation parts

FILE NO. SVM-04007

Part

No.

Part name (Q'ty)

Installation plate x 1

Wireless remote control x 1

Battery x 2

Others

Owner’s manual

Name

Part

No.

Part name (Q'ty)

Remote control holder x 1

Filter frame x 2

Zeolite filter x 2

Part

No.

Part name (Q'ty)

Bioenzyme filter x 2

Mounting screw ∅4 x 25 s x 8

Pan head wood screw ∅3.1 x 16 s x 2

Installation manual

(For Heat pump model only)

This model is not equipped with an extension drain hose.

Drain nipple* x 1

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

Option :

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

– 35 –

FILE NO. SVM-04007

8-3-3. Installation/Servicing tools

In the case of an air conditioner using R410A, in order to prevent any other refrigerant from being charged accidentally, the service port diameter of the outdoor unit control valve (3 way valve) has been changed. (1/2 UNF 20 threads per inch)

•

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

New tools for R410A

New tools for R410A Applicable to R22 model Changes

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

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

Charge hose In order to increase pressure withstand strength,

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

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

of a charging cylinder, as air bubbles occur.

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

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

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

Gauge for projection Used when flare is made by using conventional

—

flare adjustment tool. Vacuum pump adapter Connected to conventional vacuum pump. It is

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

Gas leakage detector Exclusive for HFC refrigerant.

• Incidentally, the “refrigerant cylinder” comes with the refrigerant designation (R410A) and protector coating in the U. S’s ARI specified rose color (ARI color code: PMS 507).

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

– 36 –

FILE NO. SVM-04007

8-4. Indoor Unit

8-4-1. Installation place

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

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

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

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

CAUTION

• Direct sunlight to the indoor unit’s wireless

receiver should be avoided.

• The microprocessor in the indoor unit should not

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

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

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

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

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

Remote

control

(Top view)

Indoor unit

Reception range

* : Axial distance

5 m

Remote control

ndoor unit

(Side view)

7 m

Reception range

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

plate

When installing the refrigerant pipes from the rear.

Pipe hole

65 mm

The center of the pipe hole is above the arrow.

100 mm

Fig. 8-4-2

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

NOTE

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

For installation of the indoor unit, use the paper pattern on the back.

* 7 m

170

120

Hook

Fig. 8-4-1

– 37–

Pipe hole

Indoor unit

Hook

Thread

Weight

Fig. 8-4-3

Hook

Pipe hole

Installation plate

8 Mounting screw

FILE NO. SVM-04007

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

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

3. Install the installation plate horizontally in the wall.

CAUTION

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

Installation plate <Keep horizontal direction>

Anchor bolt

Projection

5 mm dia. hole

15 mm or less

8-4-3. Electrical work

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

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

NOTE

• Wire type : More than 1.5 mm

(H07RN-F or

245 IEC66) or 1.3 mm2 (AWG-16)

CAUTION

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

NOTE

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

8 Mounting

screw

∅4 x 25

Clip anchor (local parts)

Fig. 8-4-4

CAUTION

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

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

• Insert clip anchors for appropriate mounting screws

NOTE

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

– 38 –

FILE NO. SVM-04007

8-4-4. Wiring connection

Air Inlet grille

Cord clamp

Screw

Terminal cover

Screw

Terminal block

Front panel

Earth line

CAUTION

• Be sure to refer to the wiring system diagram labeled inside the front panel.

• Check local electrical cords and also any specific wiring instructions or limitations.

Connecting cable

about 15 cm

Fig. 8-4-6

Connecting cable

Fig. 8-4-5

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

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

2. Remove the terminal cover and cord clamp.

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

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

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

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

7. Secure the connecting cable with the cord clamp.

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

Earth line

Fig. 8-4-7

NOTE

Use stranded wire only.

• Wire type : More than 1.5 mm 2 (H07RN-F or 245 IEC66) or 1.3 mm2 (AWG-16)

Fig. 8-4-8

NOTE

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

• When attaching the air inlet grille, the contrary of

the removed operation is performed.

Fig. 8-4-9

– 39 −

FILE NO. SVM-04007

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

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

Slit (Body-right)

Fig. 8-4-10

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

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

(To the forefront of flare)

400 mm

300 mm

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

43 mm

Liquid side

Gas side

Outward form of indoor unit

Use the handle of screwdriver, etc.

Fig. 8-4-12

NOTE

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

Slit (Body-right)

Fig. 8-4-11

<Left-hand connection with piping>

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

Bend the connection pipe within a radius of 30 mm.

CAUTION

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

Indoor unit

Auxiliary pipes

Installation plate

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

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

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

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

it.

Connecting cable

Drain hose

– 40 –

FILE NO. SVM-04007

8-4-6. Indoor unit fixing

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

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

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

Hook

Hook here

1 Installation

plate

Press

(unhook)

Fig. 8-4-13

• For detaching the indoor unit from the installation

plate, pull the indoor unit toward you while pushing

its bottom up at the specified parts.

8-4-7. Drainage

1. Run the drain hose sloped downwards.

NOTE

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

Do not form the Do not rise the drain hose.

50 mm or more

Do not put the drain hose end into water.

drain hose into

a wavy shape.

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

Fig. 8-4-15

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

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

Fig. 8-4-14

Shield pipe

Drain hose

PushPush

Inside the room

Fig. 8-4-16

Extension drain hose

CAUTION

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

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

Wall

Drain guide

Space for pipes

– 41 –

Fig. 8-4-17

FILE NO. SVM-04007

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

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

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

• A place full of machine oil.

• A saline-place such as the coast.

• A place full of sulfide gas.

• A place where high-frequency waves are likely

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

8-5-2. Refrigerant piping connection

1. Cut the pipe with a pipe cutter.

90°

Obliquity

Roughness Warp

Fig. 8-5-2

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

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

Die

Pipe

Fig. 8-5-3

Rigid (Clutch type)

Outer dia. R410A Conventional

of copper pipe tool used tool used

6.35 0 to 0.5 1.0 to 1.5

9.52 0 to 0.5 1.0 to 1.5

12.70 0 to 0.5 1.0 to 1.5

Imperial (wing nut type, conventional tool)

Outer dia.

of copper pipe

R410A

6.35 1.5 to 2.0

9.52 1.5 to 2.0

12.70 2.0 to 2.5

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.

Strong

wind

Fig. 8-5-1

CAUTION

• Do not apply excess torque.

• Otherwise, the nut may crack depending on the

conditions.

– 42 –

FILE NO. SVM-04007

(Unit : N·m)

Outer dia.

of copper pipe

Tightening torque

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

∅12.70 mm 50 to 62 (5.0 to 6.2 kgf·m)

• Tightening torque of flare pipe connections

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

Flare at indoor unit side

Flare at outdoor unit side

Fig. 8-5-4

Flare nutHalf union

Externally threaded side

Use a wrench to secure.

Use a torque wrench to tighten.

Internally threaded side

Fig. 8-5-5

8-5-3. Evacuating

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

AIR PURGE

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

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

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

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

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

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

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

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

7. Remove the charging hose from the service port.

8. Securely tighten the caps on the packed valves.

CAUTION

•

KEEP IMPORTANT 4 POINTS FOR PIPING WORK

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

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

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

– 43 –

Compound pressure gauge

-101kPa (-76cmHg)

Handle Lo

Charge hose

(For R410A only)

Connecting pipe

Packed valve at liquid side

Fig. 8-5-6

Pressure gauge

Manifold valve

Handle Hi (Keep full closed)

Charge hose (For R410A only)

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

Vacuum

pump

Packed valve at gas side

Service port (Valve core (Setting pin))

FILE NO. SVM-04007

123

TO CHARGE REFRIGERANT

Refrigerant

No need to charge refrigerant

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

24 Class

15 m or less 15 m or less

18 Class

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

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

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

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

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

Service port

9 to 10 N·m (0.9 to 1.0 kgf·m)

Hexagonal wrench is required.

8-5-4. Wiring connection

1. Remove the valve cover from the outdoor unit.

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

3. When connecting the connecting cable to the outdoor unit terminal, make a loop as shown in the

installation diagram of indoor and outdoor unit, to

prevent water coming in the outdoor unit.

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

Terminal block

LN 1 32

Terminal screw

Cord clamp

Power supply cord

Earth line

Screw

Cord clamp

Connecting cable

4 mm

Fig. 8-5-7

Power supply cord

Earth line

Connecting cable

Fig. 8-5-8

Model

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

Power cord

24 Class

20A 20A

(H07R N-F or 245 IE C 66)

4 mm or 3.5 mm2 (AWG -12)

18 Class

CAUTION

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

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

• Every wire must be connected firmly.

NOTE: Connecting cable

• Wire type: More than 1.5 mm 245 IEC66) or 1.3 mm

– 44 –

(H07RN-F or

2 (AWG-16)

FILE NO. SVM-04007

8-6. How to Set Remote Control Selector

Switch

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

• 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 and Front panel. (Refer to page 63, 10-1)

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

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

Fig. 8-6-1

Slector switch

A B

FAN MODE

SWING

FIX

OFF SET CLR

FILTER

PRESET

START/STOP

ECO

TIMER

AUTO

Hi-POWER

MEMO

CLOCK CHECKRESET

[MODE] button

[CHECK] button

Fig. 8-6-2

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

– 45 –

FILE NO. SVM-04007

8-7. Others

8-7-1. Gas leak test

Electric parts cover

Flare nut connections (Outdoor unit)

Valve stem cap connection

Fig. 8-7-1

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

8-7-2. Test operation

Flare nut connections (Indoor unit)

Valve stem cap

connection

Service cap connection

8-7-3. Auto restart setting

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

Information

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

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

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

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

TEMPORARY button

Fig. 8-7-2

– 46 –

9. TROUBLESHOOTING CHART

FILE NO. SVM-04007

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.

9-2. Basic Check Items

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

9-2-1. Power supply voltage

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

9-2-3. Program control

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

Table 9-2-1

No. Operation of air conditioner Descriptions

1 When the main power supply is turned

on, the OPERATION lamp on the indoor unit blinks.

2 The indoor fan motor speed does not

change in the Dry operation.

3 The compressor is not turned off even

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

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

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

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

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

Automatic operation.

9 The Fan only operation continues in the

Automatic operation.

10 The ECO operation or Hi-POWER

operation does not work.

11 When [Hi POWER] button is pressed,

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

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

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

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

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

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

– 47 –

FILE NO. SVM-04007

9-3. Primary Judgement

9-3-1. Role of indoor unit controller

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

indoor heat exchanger by the indoor temperature sensor

 Temperature setting of the indoor heat exchanger by

the heat exchanger sensor

 Louver motor control

 Indoor fan motor operation control

 LED display control

 Transferring of operation commands to the outdoor

unit

Table 9-3-1

Lamps Self-diagnosis

A OPERATION lamp is blinking. (1Hz)

B OPERATION lamp is blinking. (5Hz)

C OPERATION lamp is blinking. (5Hz)

D OPERATION lamp is blinking. (5Hz)

E OPERATION lamp is blinking. (5Hz)

F OPERATION and TIMER lamps are blinking.

(5Hz)

9-3-2. Failure diagnosis

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

Power failure (when the power supply is turning on)

Thermo sensor (TA) short or break

Heat exchanger sensor (TC) short or break

Indoor fan motor lock or failure

Indoor P.C. board failure

Wrong wiring of connecting cable

G OPERATION, TIMER and PRE-DEF.

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

Table 9-3-2 Diagnosis by detective operation

Symptom Check Primary judgement

The remote control does not work.

The outdoor fan does not rotate.

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

The compressor operates.

The compressor does not operate.

Cycle failure  Gas shortage or other refrigerant cycle trouble

 Heat exchanger sensor open, break or short

 Overload relay or thermostat trouble of compressor

The remote control still does not work.

The remote control works.

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

OK.

The outdoor unit (Outdoor fan motor) is defective.

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

- 48 -

9-4. Self-Diagnosis by Remote Control

(Check Code)

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

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

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

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

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

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

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

SET CLR

CLOCK CHECKRESET

FILE NO. SVM-04007

(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 continuously. (5 times per 1 sec.)

AUTOA

START/STOP

FAN MODE

SWING

ECO

TIMER

FIX

OFF SET CLR

FILTER

A B

PRESET

AUTO

Hi-POWER

MEMO

CLOCK CHECKRESET

(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:

•

Check the unit with all 35 check codes (00 to 22).

1E02

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.

•

Alphanumeric characters are used for the check code.

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

* This illustration is only for Heat pump model.

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

(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.

All off

Operation continues.

All off

Operation continues.

All off

Operation continues.

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. 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. 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-04007

Judgement and action

1. Check the indoor thermo sensor (TA).

2. Check the indoor P.C. board.

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

2. Check the indoor P.C. board.

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

2. Check the indoor fan motor.

3. Check the indoor P.C. board.

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

Overload operation of refrigerating cycle

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

• Check the crossover cable and

connect it properly.

• Check the outdoor P.C. board.

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

• Check whether or not both of serial

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

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

1. Check the outdoor thermo sensor (TE).

2. Check the outdoor P.C. board.

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

2. Check the outdoor P.C. board.

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

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

1. Check the heat exchanger sensor (TD).

2. Gas purging

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

− 50 −

9-5. How To Diagnose Faulty Parts

[04 Serial signal error] (Heat pump model)

FILE NO. SVM-04007

Operation

Check item

Conceivable principle cause

Measure

Does outdoor

unit operate?

YES

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

Outdoor P.C. board

is defective.

Indoor P.C. board

is defective.

Item by symptoms

Connect crossover

wires properly.

Connect connector

properly.

Replace

P.C. board.

Replace

P.C. board.

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

Does four-way valve

operate properly?

YES

Is TC sensor

resistance value

(10kΩ at 25°C) normal?

YES

Does coil terminal have 220 − 240 V

in heating operation?

YES

Are circuit

wires normal?

YES

Is outdoor P.C. board

normal?

YES

Four-way valve

is defective.

Outdoor P.C. board

is defective.

(CN11 220 − 240V)

Indoor P.C. board

is defective.

Replace

Four-way valve

Circuit check/modification

Replace

P.C. board.

Replace

P.C. board.

Replace TC sensor.

− 51 −

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

FILE NO. SVM-04007

Replace TC

sensor.

YES

Connect TC

sensor properly.

Does compressor operate?

YES

Is compressor

turned off shortly?

Is TC sensor

resistance value

(10kΩ at 25°C) normal?

YES

Is TC sensor

disconnected from

the sensing element?

YES

Does inner

overload relay

(in compressor)

operate?

Is circuit wiring

normal?

YES

Is outdoor P.C. board normal?

YES

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)

Connect

connector

properly.

Replace

condenser.

Replace

fan motor.

Is connector

connected properly?

Is condenser normal?

Is indoor fan

motor normal?

YES

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

Anti-freezing operation

Clean filters.

Replace

TC sensor.

Charge

refrigerant.

Indoor P.C. board

is defective.

− 52 −

Replacd

P.C. board.

[0C Indoor TA sensor error]

FILE NO. SVM-04007

Is CN04 (TA sensor connector)

connected properly?

YES

Is TA sensor resistance value

(10 kΩ at 25

°C)

YES

normal?

[0d Indoor TC sensor error]

Is CN05 (TC sensor connector)

connected properly?

YES

Indoor P.C. board is defective.

Connect CN04 properly.

Replace TA sensor.

Replace P.C. board.

Connect CN05 properly.

Is TC sensor resistance value

(10 k

Ω

at 25°C) normal?

YES

Indoor P.C. board is defective.

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

Is TE sensor connector

connected properly?

YES

Is TE sensor resistance value

(10 k

Ω

at 25°C) normal?

YES

Replace TC sensor.

Replace P.C. board.

Connect connector

properly.

Replace TE sensor.

Indoor P.C. board is defective.

− 53 −

Replace P.C. board.

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

FILE NO. SVM-04007

Is TD sensor

connected properly?

YES

Is TD sensor resistance value

(50 k

Ω

at 25°C) normal?

YES

Outdoor P.C. board is defective.

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

Connect connector

properly.

Replace TD sensor.

Replace P.C. board.

Is protective

controller such as discharge

thermostat normal?

YES

Is charged amount

of refrigerant normal?

YES

Is overload relay normal?

Is TD sensor resistance value

(50 kΩ at 25°C) normal?

YES

NO NO

YES

Are wires connected

to connector properly?

Outdoor P.C. board is defective.

Connect wires to

connector properly.

Check and modify charged

amount of refrigerant.

Unit operates normally.

Replace TD sensor.

Replace P.C. board.

− 54 −

9-6. Troubleshooting for Indoor unit

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

FILE NO. SVM-04007

(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?

Turn off power supply

once, and 5 second

later, turn it on again.

Is OPERATION

lamp blinking?

YES

Does

Is it possible to

turn on power

supply by pressing

[START/STOP]

button on

remote control?

YES

NO NO

transmission

mark on

remote control

flash normally,

and is its

signal

transmitted

properly?

YES

Operation

Check item

Conceivable principle cause

Measure

Item by symptoms

Remote control

is defective.

Refer to 9-9

Troubleshooting for

Remote Control.

Is fuse (F01)

of indoor

control board

blown?

Is voltage

(DC 12V or 5V)

indicated on rear

of indoor control

board normal?

Is DC

310 − 340V

supplied to

primary side

of transfer

switch?

YES

Are DC 15V,

DC 12V and

DC 7V

supplied to

secondary

side of

transfer

switch?

YES YES

NO NO

Refer to

or this problem

is one step short

of power P.C.

board block.

Turn off breaker

once and turn it

on again after

removing motor.

YES

Parts (R21, R22, SG01,

C15, C01, DB01,

C02, IC01

and T01)

are defective.

Are DC 15V,

DC 12V or

DC 7V

supplied to

secondary

side of

transfer

switch?

Does the fan motor connector

between

1 and 2

short-circuit?

Microcomputer

defective.

Transfer switch,

IC (IC01) for

power supply

or fan motor

is defective.

YES

Unit operates

normally.

Replace main

P.C. board.

− 55 −

Replace motor.

FILE NO. SVM-04007

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

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

(In heating operation, the indoor fan motor does not operate for approximately 5 minutes after it is turned on, to prevent a cold air from blowing in.)

Turn off power

supply once, and

turn it on again.

Does

Fan motor

continue to

operate?

Start to operate

indoor unit in

cooling operation

at airflow level

LOW .

Does indoor

fan operate?

YES

Change airflow

level to High .

Is it possible to

change airflow level to High ?

YES

Is it possible to detect

DC 1V or more between

and 3d of motor

connector (CN10).

YES

Is it possible to detect DC

−

340V between 1e and

310

of motor connector (CN10).

YES

(Motor connection condition)

Is it possible to detect DC 15V

between 4

Start to operate the indoor unit

in except heating operation. At this time, is it possible to

Is it possible to rotate cross-flow

and 3d of motor

connector (CN10).

YES

detect DC 1V or more

between 5

motor connector (CN10)?

fan by hand properly?

and 3d of

Turn off indoor unit and remove connector from

motor. Then press

START/STOP button on

remote control to stop

blinking lamp on indoor unit.

Is it possible to detect DC 15V between 4

of motor connector (CN10).

Turn off indoor unit and remove connector from

motor. Then start to

operate indoor unit with

remote control.

and 3

Replace indoor

fan motor.

Replace main

P.C. board.

Fan motor

operates

normally.

Turn off indoor unit and rotate

cross-flow fan by hand when the

unit is on standby. At this time,

is it possible to detect DC 1V

or more between 5

of motor connector (CN10).

YES

and 3

Start to operate the

indoor unit in except

heating operation. At this

time, is it possible to detect

DC 1V or more between

and 3d of motor

connector (CN10)? (Check

this condition within 15

seconds after starting unit.)

− 56 −

YES

Replace bearing.

FILE NO. SVM-04007

9-6-3. Indoor fan motor automatically starts to rotate by turning on power supply. <Cause>

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

(1) Remove the front panel. (Remove 4 screws.) (2) Remove the cover of the fan motor lead wires. (3) Check DC voltage with CN10 connector while the fan motor is rotating.

NOTE:

• Do not disconnect the connector while the fan motor is rotating.

• Use a thin test rod.

Indoor fan starts rotating when power supply is turned on.

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

Measure voltage between 2 (GND:BLACK) and 3 (V line:YELLOW) of motor connector

(CN10) while indoor fan motor is rotating.

DC 1.0V or more

P.C. board is defective.

Replace P.C. board.

Under DC 1.0V

Motor is defective.

Replace motor.

Yellow

Black

P.C. board

CN10

6 (Blue) 5 (Yellow)

4 (White) 3 (Black)

2 — 1 (Red)

− 57 −

9-6-4. 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?

-Cooling only model-

FILE NO. SVM-04007

– 58 –

- Cooling model -

Turn on power supply.

FILE NO. SVM-04007

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

Compressor is defective.

Capacitor is defective.

Refer to item Power

can not be turned on .

Refer to 9-9 Troubleshooting

for Remote Control .

Replace P.C. Board

Connect crossover

cable properly.

Rewire or replace

defective cords.

Replace compressor.

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

Overload relay is defective.

Compressor is defective.

Gas shortage (Gas leak)

Replace overload relay.

Replace compressor.

Supply gas.

− 59 −

<Inspection procedure)

- Heating model -

AC 70-100V

FILE NO. SVM-04007

Replace transformer

outdoor

P.C. board.

− 60 −

YES

FILE NO. SVM-04007

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

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.

– 61 –

FILE NO. SVM-04007

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?

(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

White

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

Terminal block

Tester

Fig. 9-7-1

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

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

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

terminal block (0V)

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

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

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

restart the unit.

Gas has a low circulation.

Measure gas pressure.

Compressor is turned off and on automatically by thermo sensor

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

Gas shortage

Gas leak

Pipe clogging

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

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

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

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

− 62 −

FILE NO. SVM-04007

9-8. Troubleshooting for P.C. board

9-8-1. How to check indoor 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.

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

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

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

a. Main P.C. board parts:

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

b. Infrared rays parts:

Infrared rays receiving circuit

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

Table 9-8-1 Inspection 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.

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.

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

Check power supply voltage;

1. Between TP2 and TP3 of CN12 (220 − 240V AC)

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

3. Between C04 and output side of IC09 (DC15V)

4. Between 12V and GND

5. Between 5V and GND

Check power supply voltage; <Heat pump model>

1. Between CN31 and CN23 (DC15 − 60V)

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

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

Check whether or not all lamps (OPERATION, TIMER, PRE.-DEF. (or FAN ONLY), ECONO. and AUTO) are indicated for 3 seconds and they return to normal 3 seconds later.

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. IC01, IC02 and T01 are defective.

4. IC01, IC02, and T01 are defective.

5. IC01, IC02, IC07 and T01 are defective.

<Heat pump model> IC05 and IC06 are defectice.

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.

− 63 −

FILE NO. SVM-04007

No. Procedure Check points Causes

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.)

1. Check whether or not the compressor operates.

2. Check whether or not the OPERATION lamp blinks.

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

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

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

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

6 If the above condition (No. 6) still

continues, start the unit in the following condition.

• Set the operation mode to HEAT.

• Set the preset temperature much

higher than room temperature.

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 defective. (Refer to Table 9-8-2.)

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

7 Connect the motor connector to the

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

• Set the operation mode to FAN.

• Set the fan speed level to HIGH.

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

1. Check it is impossible to detect the voltage (DC 15V) between 3 and 4 of the motor terminals.

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

3. The motor rotates but vibrates strongly.

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

2. The connection of the motor connector is loose.

3. The P.C. board is defective.

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

Temperature 0°C10°C20°C25°C30°C

Resistance value 33.8 20.35 12.59 10.0 7.99

(kΩ)

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

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

with a tip of a pencil.

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

signal to the indoor unit.

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

The self cleaning function is set from a factory. To cancel this function, should keep press the temporary

switch for 20 seconds till can hear the long combination sound and repeat same procedure when need to set.

− 64 −

AUTOA

START/STOP

FAN MODE

SWING

ECO

TIMER

FIX

OFF SET CLR

FILTER

A B

PRESET

AUTO

Hi-POWER

MEMO

CLOCK CHECKRESET

9-8-3. P.C. Board layout

FILE NO. SVM-04007

Top View

Bottom View

− 65 −

9-9. Troubleshooting for Remote Control

FILE NO. SVM-04007

Is receiver on

indoor unit exposed

to direct sunlight?

YES

Is there any

thyristor fluorescent

light nearby?

YES

NO NO

Press START/STOP

button.

Is transmission

mark indicated?

Does indoor unit

operate when

moving remote control

near receiver or

indoor unit?

YES

Batteries are

exhausted.

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

Press RESET button

on remote control

with tip of pencil.

Press START/STOP

button.

Avoid direct

sunlight.

Keep indoor unit

away from

thyristor

fluorescent light.

Does indoor unit

start to operate by

automatic restart

function?

YES

Does radio sound

is affected by

remote control when

a signal is transmitted

at distance of 5 cm

from radio?

P.C. board is

defective.

Replace

P.C. board.

YES

Replace

batteries.

Note : After replacing batteries,

press the RESET button with a tip of a pencil.

− 66 −

Is transmission mark

indicated?

YES

Does indoor unit

beep and operate?

YES

Normal

operation

Remote control

is defective.

Replace

remote control.

FILE NO. SVM-04007

(2)

4-screws

(6) TC sensor

10. PART REPLACEMENT

10-1. Indoor Unit

No. Part name Procedures Remarks

1 Front panel

How to remove the front panel

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

2) Pull the inlet grille toward you to open it and remove 4 screws fixing the front panel.

3) Remove upper 3 hooks of the front panel from the back body.

4) Open the horizontal grille right below by hand.

5) Pull the lower side of the front panel toward you until it touches the horizontal grille to remove it.

2 Electrical part

assembly

How to mount the front panel

1) Mount the front panel with the inverse procedure of “How to remove the front panel”.

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

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

1) Remove the front panel with the procedure 1.

2) Remove the screw fixing the electrical part box.

3) Remove the drain guide.

4) Remove the connector (5P) for the fan motor and the connector (6P) for the louver motor from the microcomputer assembly.

5) Remove the screw for the earth, and pull the electrical part base toward you to remove it from the main unit.

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

(3) Drain guide

(3)

(4)

(5) screws

5P 6P

(2) screws

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

− 67 −

FILE NO. SVM-04007

Bearing base

Bearing

Motor fixture

(4) BODY (R)

(3) 2 screws

(5)

No. Part name Procedures Remarks

3 Horizontal grille

4 Heat exchanger

1) Remove center 2 shafts of the horizontal grille from the back body.

2) Remove left shaft of the horizontal grille from the back body.

3) Remove the horizontal grille from the back body.

1) Remove the front panel, electrical parts assembly and the horizontal grille with procedure 2 and 3.

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

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

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

(1) Center shafts

(2) Left shafts

(3) 2 screws

(2) Screw

Bearing base

(3)

Pipe holder

(4) 2 screws

5 Cross flow fan

6 Bearing base

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

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

3) Remove 2 screws fixing the bearing base and the

back body.

4) Pull the cross flow fan toward you.

1) Remove the front panel, electrical parts assembly, horizontal grille, heat exchanger and the cross flow fan with procedure 5.

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

(3) Screws

(2) Set screw

When assembling the cross flow fan, fix it with the set screw at the position where the gap between the back body and the right surface of the cross flow fan is 4 mm.

7 Fan motor

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

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

3) Remove 2 screws of the motor fixture.

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

5) Remove the motor from the motor fixture.

− 68 −

FILE NO. SVM-04007

10-2. Outdoor Unit (RAS-24UAH-ES3, RAS-24UA-ES3, RAS-24UAH-AS3, RAS-24UA-AS3)

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

Electrical parts cover

Front cabinet Side cabinet

4 screws ∅4 x 22L

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

RAS-24UAH-ES3, RAS-24UAH-AS3

Spark killer

Running capacitor for compressor

Running capacitor for fan motor

Running capacitor for compressor

− 69 −

Magnetic contactor

RAS-24UA-ES3

Running capacitor for fan motor

FILE NO. SVM-04007

No. Part name Procedures Remarks

Electric starter

(RAS-24UA-AS3)

1) Perform the common procedure 1

2) Remove the fixing screw. (1 screw ∅4 x 12L)

3) Disconnect the lead wires from the terminal.

Running capacitor for compressor

Spark killer

Starting capacitor for compressor

Running capacitor for fan motor

Magnetic contactor

RAS-24UA-AS3

Electric starter

− 70 −

FILE NO. SVM-04007

10-3. Outdoor Unit (RAS-18UAH-ES3, RAS-18UAH-AS3)

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-04007

10-4. Outdoor Unit (RAS-18UA-ES3, RAS-18UA-AS3)

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

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 −

11. EXPLODED VIEWS AND PARTS LIST

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

404

FILE NO. SVM-04007

406

402

407

403

Location Part

No. No.

402 43T60002 Terminal Block, 3P

3P AC300V, 20A

403 43T50004 Sensor, Heat Exchanger

10k 25°C

404 43T69005 Sensor, Thermostat 10k25°C

405 43T69066 P.C. Board ASSY, WRS-LED

MCC-819

406 43T69375 P.C. Board ASSY

(RAS-24UKHP-ES3 / AS3)

Description

405

Location Part

No. No.

406 43T69376 P.C. Board ASSY

(RAS-24UKP-ES3 / AS3)

406 43T69377 P.C. Board ASSY

(RAS-18UKHP-ES3 / AS3)

406 43T69378 P.C. Board ASSY

(RAS-18UKP-ES3 / AS3)

407 43T62003 Clamp, Cord

Description

− 73 −

FILE NO. SVM-04007-(1)

11-2. Indoor Unit

203

205

201

227

229

228

221

213

208

220

219

222

214

215

217

210

230

223

218

226

212

216

211

209

224

207

232

231

225

204

206

202

Location Part

No. No.

201 43T00048 Front Panel, ASSY 202 43T00049 Grille ASSY (For Heat pump model) 202 43T00050 Grille ASSY (For cooling only model) 203 43T80306 Air Filter (L) 204 43T80304 Air Filter (R) 205 43T80003 Filter, Frame 206 43T01004 Mark 207 43T03010 Body, Right 208 43T03011 Body, Left 209 43T03012 Hide, Claw 210 43T09317 Grille, Horizontal 211 43T70301 Hose ASSY, Drain 212 43T21302 Motor, Stepping 213 43T44025 Refrigeration Cycle Assembly 214 43T47311 Pipe, Delivery

215 43T47312 Pipe, suction 216 43T11002 Pipe, Shield (RAS-18,24UKHP-ES3, UKP-ES3)

216 43T49021 Pipe, Shield (RAS-18,24UKHP-AS3, UKP-AS3) 217 43T19003 Holder, Sensor 218 43T49009 Spring 219 43T49036 Plate, EVA-Seal 220 43T49039 Holder, Plate, EVA-Seal

Description

236

Location Part

No. No.

221 43T49038 Plate, EVA-Seal 222 43T49037 Holder , Plate EVA-Seal 223 43T79007 Guide Drain 224 43T39016 Fix Motor 225 43T60075 Fan Motor Cord 226 43T21327 Motor, Fan 227 43T20014 Fan, Cross Flow 228 43T22002 M-Bearing ASSY 229 43T39015 Base, Bearing 230 43T03013 Back Body ASSY 231 43T07022 Holder, Pipe 232 43T82007 Plate, Installation 233 43T85410 Owner's Manual (All model) 233 43T85411 Owner's Manual (RAS-18,24UKHP-ES3,

233 43T85412 Owner's Manual (RAS-18,24UKP-ES3) 233 43T85413 Owner's Manual (RAS-18,24UKHP-ES3)

234 43T69310 Remote Control, Wireless

234 43T69309 Remote Control, Wireless

235 43T83003 Holder, Remote Control 236 43T62029 Cover, Terminal

− 74 −

234

235

233

Description

UKP-ES3)

(For Cooling only model)

(For Heat pump model)

11-3. Outdoor Unit (RAS-24UAH-ES3, RAS-24UAH-AS3)

FILE NO. SVM-04007-(1)

12, 14

11, 13

33, 34

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,

220 − 24V 50Hz 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

− 75 −

11-4. Outdoor Unit (RAS-18UAH-ES3, RAS-18UAH-AS3)

FILE NO. SVM-04007

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.

− 76 −

Description

19 43T47308 Capillary Tube, 1.0Dia. 20 43T47014 Capillary Tube, 1.7Dia. 23

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

35 43T69336 PC Board

38 43T60325 Filter, Clamp

MF Capacitor (2µ F 450V)

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

FILE NO. SVM-04007

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

− 77 −

Description

43T49309 Rubber Cushion

11-6. Outdoor Unit (RAS-24UA-AS3)

FILE NO. SVM-04007

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

− 78 −

43T49309 Rubber Cushion

43T33002 Spark-Killer

43T53001 Starter Electric

Description

11-7. Outdoor Unit (RAS-18UA-ES3, RAS-18UA-AS3)

FILE NO. SVM-04007

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.

− 79 −

Description

15 43T46317 Valve, Packed 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

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 –

Toshiba RAS-18UA-AS3, RAS-24UKP-AS3, RAS-24UAH-ES3, RAS-24UAH-AS3, RAS-18UAH-AS3 SERVICE MANUAL

Specifications and Main Features

Frequently Asked Questions

User Manual

1. SPECIFICATIONS

2. CONSTRUCTION VIEWS

3. WIRING DIAGRAM

5. REFRIGERATION CYCLE DIAGRAM

7-7. Auto Restart Function

9. TROUBLESHOOTING CHART

10. PART REPLACEMENT

11. EXPLODED VIEWS AND PARTS LIST