TOSHIBA RAS-18UFHP -E4, RAS-18UFP -E4, -AR4, RAS-18UFPX 4, 4-T2, RAS-24UFHP -E4, RAS-24UFP -E4, -AR4, RAS-24UFPX 4, RAS-18UAH -E4, RAS-18UA -E4, -AR4, RAS-18UAX 4, 4-T2, RAS-24UAH -E4, RAS-24UA -E4, -AR4, RAS-24UAX 4 air conditioner Service manual

FILE NO. SVM-05015

SERVICE MANUAL

AIR-CONDITIONER

UNDER CEILING / CONSOLE TYPE

RAS-18UFHP-E4 / RAS-18UAH-E4

RAS-18UFP-E4 / RAS-18UA-E4

RAS-18UFPX4 / RAS-18UAX4

RAS-18UFP-AR4 / RAS-18UA-AR4

RAS-18UFPX4-T2 / RAS-18UAX4-T2





18 Class

(Heat pump model)

18 Class

(Cooling only model)

24 Class

May, 2005

FILE NO. SVM-05015

CONTENTS

1. SPECIFICATIONS

1-1 18 Class

1-2 24 Class

2. CONSTRUCTION VIEWS

2-1 Indoor Unit

2-2 Outdoor Unit (RAS-24UAH-E4, RAS-24UA-E4, RAS-24UAX4, RAS-24UA-AR4)

RAS-18AX4-T2)

2-3 Outdoor Unit (RAS-18UAH-E4)

2-4 Outdoor Unit (RAS-18UA-E4, RAS-18UAX4, RAS-18UA-AR4)

3. WIRING DIAGRAM

3-1 RAS-18UFHP-E4 / RAS-18UAH-E4

3-2 RAS-18UFP-E4 / RAS-18UA-E4, RAS-18UFPX4 / RAS-18UAX4

3-3 RAS-18UFP-AR4 / RAS-18UA-AR4

3-4 RAS-18UFPX4-T2 / RAS-18UAX4-T2


3-6 RAS-24UFP-E4 / RAS-24UA-E4

RAS-24UFPX4 / RAS-24UAX4

RAS-24UFP-AR4 / RAS-24UA-AR4

4. SPECIFICATION OF ELECTRICAL PARTS

4-1 Indoor Unit


4-3 Outdoor Unit (RAS-18UAX4, RAS-18UA-E4)

4-4 Outdoor Unit (RAS-18UA-AR4)

4-5 Outdoor Unit (RAS-18UAX4-T2)


4-7 Outdoor Unit (RAS-24UA-E4, RAS-24UAX4)

4-8 Outdoor Unit (RAS-24UA-AR4)

5. REFRIGERATION CYCLE DIAGRAM



RAS-18UFPX4 / RAS-18UAX4


5-4 RAS-18UFPX4-T2 / RAS-18UAX4-T2



RAS-24UFPX4 / RAS -24UAX4


−

1

−

FILE NO. SVM-05015

6. CONTROL BLOCK DIAGRAM

6-1 RAS-18UFHP-E4, RAS-24UFHP-E4

6-2 RAS-18UFP-E4, RAS-18UFPX4, RAS-18UFP-AR4, RAS-18UFPX4-T2

RAS-24UFP-E4, RAS-24UFPX4, RAS-24UFP-AR4

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

7-10 QUIET Mode

7-11 COMFORT SLEEP mode

8. INSTALLATION PROCEDURE

8-1 Safety Cautions

8-2 Installation Diagram of Indoor and Outdoor Units

8-3 Installation

8-4 Indoor Unit

8-5 Outdoor unit

8-6 How to Set Remote Control Selector Switch

8-7 How to Use Drain Pump Kit of Option

8-8 Others

9. TROUBLESHOOTING CHART

9-1 Troubleshooting Procedure

9-2 Basic Check Items

9-3 Primary Judgement

9-4 Self-Diagnosis by Remote Control (Check Code)

9-5 How to Diagnose Faulty Parts

9-6 Troubleshooting for Indoor Unit

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

9-8 Troubleshooting for P.C. Board

9-9 Troubleshooting for Remote Control

10. PARTS REPLACEMENT

10-1 Indoor Unit

10-2 Outdoor Unit (RAS-24UAH-E4, RAS-24UA-E4, RAS-24UAX4,

RAS-24UA-AR4, RAS-18UAX4-T2)


10-4 Outdoor Unit (RAS-18UA-E4, RAS-18UAX4, RAS-18UA-AR4)

−

2

−

11. EXPLODED VIEWS AND PARTS LIST

11-1 Indoor Unit (E-Parts Assy)

11-2 Indoor Unit

11-3 Outdoor Unit (RAS-18-UAH-E4)

11-4 Outdoor Unit (RAS-18UA-E4, RAS-18UAX4)

11-5 Indoor Unit (RAS-18UA-AR4)

11-6 Outdoor Unit (RAS-18UAX4-T2)


11-8

11-9

Outdoor Unit (RAS-24UA-E4, RAS-24UAX4)

Outdoor Unit (RAS-24UA-AR4)

FILE NO. SVM-05015

−

3

−

FILE NO. SVM-05015

1. SPECIFICATIONS

1-1

ITEM

Capacity

Power source

MODEL

kW

Phase

V

Hz

W

RAS-18UFHP-E4/18UAH-E4

RAS-18UFP-E4/18UA-E4

RAS-18UFPX4/18UAX4

RAS-18UFP-AR4/18UA-AR4 RAS-18UFPX4-T2/18UAX4-T2

220V

Cooling

240V 220V

Heating

240V 220V 240V 220V

Cooling

240V 220V

2000

5.00 5.70 5.80 5.20 5.25 5.35 5.35 5.10

1

∅

220 – 240 220

50

2130 1830 2000 2000 2120 2020 2140 1610 Power consumption

Power factor % 95 87 93 84 96 91 95 83 98

Indoor A 0.40

0.40

0.40

0.40

0.40

0.40

0.40

0.40

0.45

Running current

Outdoor A 9.20 9.85 8.50 9.50 9.05 9.30 9.30 10.30 7.00

Starting current A

45

42 50 42

Moisture removal lit/h 2.0

Noise

Indoor (H/M/L) dB 43/41/39/37/36

Outdoor dB 52 53 53 54 51 52 52 53

46/43/41/38/36

56

Refrigerant

Name of refrigerant R-22

Rated amount kg 1.15 1.17 1.20 1.47

Refrigerant control Capillary tube

Gas side size mm

∅

12.70 Ø 15.88

Connection type

Interconnection

Liquid side size mm

Connection type

Flare connection

∅

6.35

Flare connection pipe Maximum length m

(One way)

15*

1

20* 2

Maximum height m difference

8

INDOOR UNIT RAS-18UFHP-E4

RAS-18UFP-E4

RAS-18UFPX4

Width mm 1093

Dimensions Height

Depth mm mm kg Net weight

Evaporator type

Indoor fan type

633

208

23

Finned tube

Multi blade fan

High fan m 3 /h 800 830

RAS-18UFP-AR4 RAS-18UFPX4-T2

800 900

Air volume Medium fan m 3 /h 680 700 680 730

Low fan m

3

/h 580 650 580 580

W 50 Fan motor output

Air filter Washable -filter

OUTDOOR UNIT RAS-18UAH-E4

RAS-18UA-E4

RAS-18UAX4

RAS-18UA-AR4 RAS-18UAX4-T2

Width mm

830 780 880

Dimensions Height mm

Depth mm

538

300

550

270

690

310

Net weight kg 54 41 44 51

Condenser type

Outdoor fan type

Finned tube

Propeller fan

Airflow volume m

3

/h 2105 2310 2105 2310 2120 2200 2120 2200 3380

Fan motor output W 65 42 65

Compressor

Model 2JS350D5A02

Output W

PH340X3C-4KT1

1700

PH340X3C-4KTS1

1800

PH290X2C-4FT1

1500

1700

Safety device IOL, Td Sensor IOL

Louver type Automatic louver

Usable outdoor temperature range °C 15 ~ 43 –10 ~ 24 15 ~ 43 21 ~ 52 21 ~ 43

Note *1 Chargeless pipe

*2 Maximum pipe

– 4 –

FILE NO. SVM-05015

1-2

MODEL

RAS-24UFHP-E4/24UAH-E4

RAS-24UFP-E4/24UA-E4

RAS-24UFPX4/24UAX4

RAS-24UFP-AR4/

24UA-AR4

ITEM

Cooling Heating Cooling

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

Phase

6.10 6.20 6.80 6.90 6.10 6.20 6.10 6.20

1

∅

Power source V 220 – 240

Hz 50

Power consumption W 2480 2650 2490 2670 2260 2400 2260 2400

Power factor % 97 90 97 89 92 84 92 81

Indoor A 0.45 0.45 0.45 0.45 0.45 0.45 0.45 0.45

Running current

Outdoor A 11.15 11.85 11.20 12.00 10.75 11.40 11.20 12.40

Starting current A 60 60 59

Moisture removal lit/h 2.5 2.7

Noise

Indoor (H/M/L) dB 46/44/42/39/37

Outdoor dB 56 57 57 58 56 57 56 57

Refrigerant

Refrigerant control

Interconnection

Name of refrigerant R-22

Rated amount kg

1.75

1.70

Gas side size

Connection type

Liquid side size

Connection type mm mm

Capillary tube

∅

15.88

Flare connection

∅

6.35

Flare connection pipe Maximum length

(One way) m 15*

1

25* 2

Maximum height m difference

10

RAS-24UFP-E4

INDOOR UNIT RAS-24UFHP-E4 RAS-24UFP-AR4

RAS-24UFPX4

Dimensions

Net weight

Evaporator type

Indoor fan type

Air volume

Fan motor output

Air filter

Width

Height

Depth mm mm mm kg

1093

633

208

23

Finned tube

Multi blade fan

High fan m

3

/h 930 930 900

Medium fan m 3 /h 750 760 750

Low fan m 3 /h

W

650 660

50

Washable -filter

650

RAS-24UA-E4

OUTDOOR UNIT RAS-24UAH-E4 RAS-24UA-AR4

RAS-24UAX4

Dimensions

Width

Height

Depth mm mm mm

880

690

310

Net weight kg 64 58 59

Condenser type Finned tube

Outdoor fan type Propeller fan

Airflow volume m 3 /h 3380 3560 3380 3560 3380 3560 3380 3560

Fan motor output W 65

Compressor

Model 2JS386D5BB02 PH400X3CS-4KT1 PH400X3CS-4KTS1

Output W 1800 1800 1900

Safety device

Louver type

IOL, Td Sensor

Automatic louver

IOL

Usable outdoor temperature range °C 15 ~ 43 –10 ~ 24 15 ~ 43 21 ~ 43

– 5 –

FILE NO. SVM-05015

Note : 1

• Capacity is based on the following temperature conditions.

Temperature

Indoor unit inlet air temperature

Outdoor unit inlet air temperature

Condition

JIS B8615-1

Cooling Heating

(DB) 27°C 20°C

(WB) 19°C 12°C

(DB) 35°C 7°C

(WB) 24°C 6°C

Note : 2

• Charge refrigerant according to the table below.

Refrigerant




RAS-18UFPX4-T2 / RAS-18UAX4-T2




RAS-18UFP-AR4 / RAS-18UA-AR4 RAS-24UFP-AR4 / RAS-24UA-AR4

*1 No need to charge refrigerant

*2 Need to charge refrigerant

15m or less 15m or less

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

– 6 –

2-1. Indoor Unit

2. CONSTRUCTION VIEWS

FILE NO. SVM-05015

Front panel

1093

208

For stud bolt

(

∅

8 -

∅

10)

For stud bolt (

∅

6)

200 Min

20

1093

1015

742

450

20

Knock out system

Grille air inlet

Back Body

Installation plate

Mount plate

M10 Suspention bolt

∅

74

UNDER CEILING & CONSOLE INSTALLATION

– 7 –

57 18

Wireless remote control

Knock out system

FILE NO. SVM-05015

2-2. Outdoor Unit (RAS-24UAH-E4, RAS-24UA-E4, RAS-24UAX4, RAS-24UA-AR4,

RAS-18UAX4-T2)

52 68

340

88

340

63.8

27

340

690

– 8 –

2-3. Outdoor Unit (RAS-18UAH-E4)

325

600 or more

54 91

FILE NO. SVM-05015

325

52

23

538

– 9 –

2-4. Outdoor Unit (RAS-18UA-E4, RAS-18UAX4, RAS-18UA-AR4)

FILE NO. SVM-05015

∅

A Detail Drawing (Back Leg)

600

6 Hole

52

36

R15

A

32.5

R5.5

115 125

∅ 30 Drain outlet

∅

436

FAN GUARD

2-∅11x14 Hole

(For ∅8-∅10 anchor bolt)

B

B Detail Drawing (Front Leg)

310 302

∅ 6 Hole

∅ 11x14 Hole

36

52

R15

COVER PV

Z

270

600

780

90

62

310

330

Electrical part cover

Liquid side

(Flare ∅6.35)

Gas side

(Flare ∅12.7)

54

Z View

100

Installation dimension

or more

600

Air inlet

600 or more

100 or more

Air outlet

600

or more

Service port

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

– 10 –

FILE NO. SVM-05015

3. WIRING DIAGRAM

3-1. RAS-18UFHP-E4 / RAS-18UAH-E4

COLOR IDENTIFICATION

BRW

RED

WHI

YEL

BLU

BLK

GRY

PNK

ORN

GRN&YEL :

GRN

PUR

:

:

:

:

:

:

:

:

:

:

: BROWN

RED

WHITE

YELLOW

BLUE

BLACK

GRAY

PINK

ORANGE

GREEN&

YELLOW

GREEN

PURPLE

BLK

P04

BLK CN30

WHI

RED

CN31

GRN&YEL

CN23

SG01

R22

F01

T6.3A

FUSE

250VAC

R09 R507

R21

J401

LOUVER

MOTOR

IC04

C15

RY401

R405

CR401

ORN

RED

PNK

YEL

BRW

BLU

CN07

6 5 4

6 5 4

3 2 1

3 2 1

L01

MAIN PCB

MCC-865A

C01

R01

CN25

INFRARED RAYS RECEIVE

AND INDICATION PARTS

1 2 3

1 2 3

4 5 6

4 5 6

7 8 9

7 8 9

10

10

CN13

BLU BLU BLU BLU BLU BLU

1 2 3

1 2 3

4 5 6

4 5 6

BLU BLU BLU WHI

7 8 9

7 8 9

10

10

DB01

C02

RY501

CR502

DC12V

DC5V

1

2

3

CN100

1

2

3

CN101

WHI

GRY

GRY

1

2

3

SWITCH

PCB

MCC-865B

C501

CR501

IC03

CN03

1 1

2 2

BLK

BLK

THERMO

SENSOR

(TA)

CN01

1 1

2 2

BLK

BLK

HEAT

EXCHANGER

SENSOR

(TC)

R506

2 1

CN402

FOR FLOAT SWITCH

(OPTION)

When you use float switch you should cut J401

CN401

1 2 3

FOR DRAIN PUMP

(OPTION)

CN11

1 2 3

1 2 3

5

5

BRW

GRY

YEL

3

3

1

1

CN10

WHI

1 1

RED

3 3

BLK

6 6

3 3

2 2

1 1

BLK

WHI

RED

PUR

BLU

GRY

FAN

MOTOR

OUTDOOR

TERMINAL

BLOCK

INDOOR

TERMINAL

BLOCK

1

POWER SUPPLY

220 − 240 V ~ 50 Hz

2 3

L

BLK

N

FERRITE CORE

1

RED

2

GRN&YEL

3

BLK RED

INDOOR

UNIT

OUTDOOR

UNIT

GRN&YEL

CHASSIS

TRANSFORMER

BLK

BLK

1 1

3 3

2 CN06

MAIN P.C. BOARD (MCC-890)

RED

1 1

RED

3 3

CN05

SG01

BLK

1

BLK

3

WHI

5

RED

7

GRY

9

1

3

5

7

9

CN01

F01

TNR

R74

250VAC T6. 3A

TNR

R73

CN07

1 1

2

3 3

DISCHARGE

PIPE

SENSOR (TD)

BLU

BLU

CN08

1 1

2

3 3

BLK

BLK

HEAT

EXCHANGER

SENSOR (TE)

R

MAGNETIC

CONTACTOR

S

T

U

V

W

A1

52C

A2

RED

CAPACITOR

R

C

S

COMPRESSOR TERMINAL

WHI

PNK

S

C

R

COMPRESSOR

BLK

RED

CAPACITOR

WHI

RED

FAN MOTOR

BLK

−

11

−

RY07

BLU

1

YEL

3

1

CN11

3

CR11

BLU

1 1

CN02

BLU

COIL FOR

4 WAY VALVE

3 3

CR12

CR13

RY05

RY06

BLK

1

1

CN03

3

FILE NO. SVM-05015

3-2. RAS-18UFP-E4 / RAS-18UA-E4, RAS-18UFPX4 / RAS-18UAX4

LOUVER

MOTOR

ORN

RED

PNK

YEL

BRW

BLU

CN25



1 2 3

1 2 3

4 5 6

4 5 6

7 8 9

7 8 9

10

10


BRW

RED

WHI

YEL

BLU

BLK

GRY

PNK

ORN

GRN&YEL :

:

:

:

:

:

:

:

:

:

GRN

PUR

:

:

BROWN

RED

WHITE

YELLOW

BLUE

BLACK

GRAY

PINK

ORANGE

GREEN&

YELLOW

GREEN

PURPLE

BLK

P04

BLK CN30

WHI

RED

CN31

SG01

R22

F01

T6.3A

FUSE

250VAC

R09

R21

CR02

R507

IC04

RY401

C15

CN07

6 5 4

6 5 4

3 2 1

3 2 1

L01

MAIN PCB

MCC-865A

RY501

CN13

C01

R01

CR502


1 2 3

1 2 3

4 5 6

4 5 6

BLU BLU BLU WHI

7 8 9

7 8 9

10

10

DB01

C02

DC12V

RY04

CN27

1 1

3 3

R405

DC5V

CR501

IC03

C501

CR401

GRN&YEL

J401

1

2

3

CN100

1

2

3

CN101

WHI

GRY

GRY

1

2

3

SWITCH

PCB

MCC-865B

CN03

1 1

2 2

BLK

BLK

THERMO

SENSOR

(TA)

CN01

1 1

2 2

BLK

BLK

HEAT

EXCHANGER

SENSOR

(TC)

R506

2 1

CN402

FOR FLOAT SWITCH

(OPTION)


CN401

1 2 3

FOR DRAIN PUMP

(OPTION)

CN11

1 2 3

1 2 3

5

5

BRW

GRY

YEL

3

3

1

1

CN10

WHI

RED

1 1

3 3

BLK

6 6

3 3

2 2

1 1

BLK

WHI

RED

PUR

BLU

GRY

FAN

MOTOR

INDOOR

TERMINAL

BLOCK

POWER SUPPLY

220 − 240 V ~ 50 Hz

1 2 3

INDOOR

UNIT

OUTDOOR

UNIT

OUTDOOR

TERMINAL

BLOCK

L

BLK

N

RED

BLK

RED

1 2

BLK

3

BLK

GRN&YEL

GRN&YEL

RED

CHASSIS

SPARK KILLER

GRY

MAGNETIC

CONTACTOR

R

U

S

V

T

A1

(or A)

W

A2

(or B)

RED

CAPACITOR

RED

CAPACITOR

WHI

PNK

S

R

C

COMPRESSOR

C

S R

BLK

COMPRESSOR TERMINAL

WHI

RED

FAN MOTOR

BLK

−

12

−

FILE NO. SVM-05015

3-3. RAS-18UFP-AR4 / RAS-18UA-AR4

COLOR IDENTIFICA TION

BRW

RED

WHI

YEL

BLU

BLK

GRY

PNK

ORN

GRN

PUR

:

:

:

:

:

:

:

:

:

:

:

GRN&YEL :

BROWN

RED

WHITE

YELLOW

BLUE

BLACK

GRAY

PINK

ORANGE

GREEN&

YELLOW

GREEN

PURPLE

BLK CN30

WHI

RED

CN31

CN27

1 1

3 3

GRN&YEL

BLK

P04

SG01

R22

F01

T6.3A

FUSE

250VAC

R09 R507

R21

J401

CR02

RY04

2 1

CN402

FOR FLOA T SWITCH

(OPTION)


LOUVER

MOTOR

IC04

RY401

C15

R405

CR401

ORN

RED

PNK

YEL

BRW

BLU

CN07

6 5 4

6 5 4

3 2 1

3 2 1

L01

MAIN PCB

MCC-865A

C01

R01

CN25

INFRARED RA YS RECEIVE

AND INDICA TION P ARTS

1 2 3

1 2 3

4 5 6

4 5 6

7 8 9

7 8 9

10

10

CN13


1 2 3

1 2 3

4 5 6

4 5 6

BLU BLU BLU WHI

7 8 9

7 8 9

10

10

DB01

C02

RY501

CR502

DC12V

DC5V

1

2

3

CN100

1

2

3

CN101

WHI

GRY

GRY

1

2

3

SWITCH

PCB

MCC-865B

C501

CR501 IC03

CN03

1 1

2 2

BLK

BLK

THERMO

SENSOR

(TA)

CN01

1 1

2 2

BLK

BLK

HEAT

EXCHANGER

SENSOR

(TC)

CN401

1 2 3

FOR DRAIN PUMP

(OPTION)

CN11

1 2 3

1 2 3

5

5

BRW

GRY

YEL

3

3

1

1

CN10

WHI

1 1

RED

3 3

BLK

6 6

3 3

2 2

1 1

R506

BLK

WHI

RED

PUR

BLU

GRY

FAN

MOTOR

INDOOR

TERMINAL

BLOCK

POWER SUPPLY

220 − 240 V ~ 50 Hz

1 2 3

INDOOR

UNIT

OUTDOOR

UNIT

OUTDOOR

TERMINAL

BLOCK

BLK

L

BLK

RED

N

RED

1 2

BLK

3

BLK

GRN&YEL

GRN&YEL

RED

CHASSIS

SPARK KILLER

GRY

MAGNETIC

CONTACTOR

R

U

S

V

T

A1 (or A)

W

A2

(or B)

RED

CAPACITOR

RED

CAPACITOR

WHI

PNK

S

R

C

COMPRESSOR

C

S

R

BLK

COMPRESSOR TERMINAL

WHI

RED

FAN MOTOR

BLK

−

13

−

FILE NO. SVM-05015

3-4. RAS-18UFPX4-T2 / RAS-18UAX4-T2


BRW

RED

WHI

YEL

BLU

BLK

GRY

PNK

ORN

GRN&YEL :

GRN

PUR

:

:

:

:

:

:

:

:

:

:

: BROWN

RED

WHITE

YELLOW

BLUE

BLACK

GRAY

PINK

ORANGE

GREEN&

YELLOW

GREEN

PURPLE

BLK

P04

BLK CN30

WHI

RED

CN31

CN27

1 1

3 3

GRN&YEL

SG01

R22

F01

T6.3A

FUSE

250VAC

R09 R507

R21

J401

CR02

RY04

2 1

CN402

FOR FLOAT SWITCH

(OPTION)


LOUVER

MOTOR

IC04

RY401

C15

R405

CR401

ORN

RED

PNK

YEL

BRW

BLU

CN07

6 5 4

6 5 4

3 2 1

3 2 1

L01

MAIN PCB

MCC-865A

C01

R01

CN25



1 2 3

1 2 3

4 5 6

4 5 6

7 8 9

7 8 9

10

10

CN13


1 2 3

1 2 3

4 5 6

4 5 6

BLU BLU BLU WHI

7 8 9

7 8 9

10

10

DB01

C02

1

2

3

CN100

1

2

3

CN101

WHI

GRY

GRY

1

2

3

SWITCH

PCB

MCC-865B

RY501

CR502

DC12V

DC5V

C501

CR501 IC03

CN03

1 1

2 2

BLK

BLK

THERMO

SENSOR

(TA)

CN01

1 1

2 2

BLK

BLK

HEAT

EXCHANGER

SENSOR

(TC)

CN401

1 2 3

CN11

FOR DRAIN PUMP

(OPTION)

1 2 3

1 2 3

5

5

BRW

GRY

YEL

3

3

1

1

CN10

WHI

1 1

RED

3 3

BLK

6 6

3 3

2 2

1 1

R506

BLK

WHI

RED

PUR

BLU

GRY

FAN

MOTOR

INDOOR

TERMINAL

BLOCK

POWER SUPPLY

220 V ~ 50 Hz

1 2 3

INDOOR

UNIT

OUTDOOR

UNIT

OUTDOOR

TERMINAL

BLOCK

L

BLK

BLK

N

RED

RED

1

BLK BLK

SPARK KILLER

RED

A1

52C

A2

R U

2

GRN&YEL

RED

3

CHASSIS

GRY

S

T

V

W

CAPACITOR

RED

WHI

PNK

S

R

CAPACITOR

C BLK

WHI

RED

BLK

FAN MOTOR

C

S R

COMPRESSOR

COMPRESSOR TERMINAL

MAGNETIC CONTACTOR

−

14

−

FILE NO. SVM-05015



BRW

RED

WHI

YEL

BLU

BLK

GRY

PNK

ORN

GRN&YEL :

GRN

PUR

:

:

:

:

:

:

:

:

:

:

: BROWN

RED

WHITE

YELLOW

BLUE

BLACK

GRAY

PINK

ORANGE

GREEN&

YELLOW

GREEN

PURPLE

BLK

P04

BLK CN30

WHI

RED

CN31

GRN&YEL

CN23

SG01

R22

F01

T6.3A

FUSE

250VAC

R09 R507

R21

J401

LOUVER

MOTOR

IC04

C15

RY401

R405

CR401

ORN

RED

PNK

YEL

BRW

BLU

CN07

6 5 4

6 5 4

3 2 1

3 2 1

L01

MAIN PCB

MCC-865A

C01

R01

CN25



1 2 3

1 2 3

4 5 6

4 5 6

7 8 9

7 8 9

10

10

CN13


1 2 3

1 2 3

4 5 6

4 5 6

BLU BLU BLU WHI

7 8 9

7 8 9

10

10

DB01

C02

RY501

CR502

DC12V

DC5V

1

2

3

CN100

1

2

3

CN101

WHI

GRY

GRY

1

2

3

SWITCH

PCB

MCC-865B

C501

CR501

IC03

CN03

1 1

2 2

BLK

BLK

THERMO

SENSOR

(TA)

CN01

1 1

2 2

BLK

BLK

HEAT

EXCHANGER

SENSOR

(TC)

R506

2 1

CN402

FOR FLOAT SWITCH

(OPTION)


CN401

1 2 3

CN11

FOR DRAIN PUMP

(OPTION)

1 2 3

1 2 3

5

5

BRW

GRY

YEL

3

3

1

1

CN10

WHI

1 1

RED

3 3

BLK

6 6

3 3

2 2

1 1

BLK

WHI

RED

PUR

BLU

GRY

FAN

MOTOR

OUTDOOR

TERMINAL

BLOCK

INDOOR

TERMINAL

BLOCK

1

POWER SUPPLY

220 − 240 V ~ 50 Hz

2 3

L

BLK

N

FERRITE CORE

1

RED

2

GRN&YEL

3

INDOOR

UNIT

OUTDOOR

UNIT

GRN&YEL

CHASSIS

BLK RED

TRANSFORMER

BLK

BLK

1 1

3 3

2 CN06

MAIN P.C. BOARD (MCC-890)

RED

1 1

RED

3 3

CN05

SG01

BLK

1

BLK

3

WHI

5

RED

7

GRY

9

1

3

5

7

9

CN01

F01

TNR

R74

250VAC T6. 3A

TNR

R73

CN07

CN08

1 1

2

3 3

DISCHARGE

PIPE

SENSOR (TD)

BLU

BLU

1 1

2

3 3

BLK

BLK

HEAT

EXCHANGER

SENSOR (TE)

MAGNETIC

CONTACTOR

R

(1/L1)

(2/T1)

U

S

(3/L2)

(4/T2)

V

T

(5/L3)

(6/T3)

W

A1

52C

A2

RED

CAPACITOR

R

C

S

COMPRESSOR TERMINAL

WHI

PNK

S

C

R

COMPRESSOR

BLK

RED

CAPACITOR

WHI

RED

FAN MOTOR

BLK

− 15 −

RY07

BLU

1

YEL

3

1

CN11

3

CR11

BLU

1 1

CN02

BLU

COIL FOR

4 WAY VALVE

3 3

CR12

CR13

RY05

RY06

BLK

1

1

CN03

3

3-6. RAS-24UFP-E4 / RAS-24UA-E4



FILE NO. SVM-05015


BRW

RED

WHI

YEL

BLU

BLK

GRY

PNK

ORN

GRN&YEL :

GRN

PUR

:

:

:

:

:

:

:

:

:

:

: BROWN

RED

WHITE

YELLOW

BLUE

BLACK

GRAY

PINK

ORANGE

GREEN&

YELLOW

GREEN

PURPLE

BLK

P04

BLK CN30

WHI

RED

CN31

CN27

1 1

3 3

GRN&YEL

SG01

R22

F01

T6.3A

FUSE

250VAC

R09 R507

R21

J401

CR02

RY04

2 1

CN402

FOR FLOAT SWITCH

(OPTION)


LOUVER

MOTOR

IC04

RY401

C15

R405

CR401

ORN

RED

PNK

YEL

BRW

BLU

CN07

6 5 4

6 5 4

3 2 1

3 2 1

L01

MAIN PCB

MCC-865A

C01

R01

CN25



1 2 3

1 2 3

4 5 6

4 5 6

7 8 9

7 8 9

10

10

CN13


1 2 3

1 2 3

4 5 6

4 5 6

BLU BLU BLU WHI

7 8 9

7 8 9

10

10

DB01

C02

1

2

3

CN100

1

2

3

CN101

WHI

GRY

GRY

1

2

3

SWITCH

PCB

MCC-865B

RY501

CR502

DC12V

DC5V

C501

CR501 IC03

CN03

1 1

2 2

BLK

BLK

THERMO

SENSOR

(TA)

CN01

1 1

2 2

BLK

BLK

HEAT

EXCHANGER

SENSOR

(TC)

CN401

1 2 3

CN11

FOR DRAIN PUMP

(OPTION)

1 2 3

1 2 3

5

5

BRW

GRY

YEL

3

3

1

1

CN10

WHI

1 1

RED

3 3

BLK

6 6

3 3

2 2

1 1

R506

BLK

WHI

RED

PUR

BLU

GRY

FAN

MOTOR

INDOOR

TERMINAL

BLOCK

POWER SUPPLY

220 − 240 V ~ 50 Hz

1 2 3

INDOOR

UNIT

OUTDOOR

UNIT

OUTDOOR

TERMINAL

BLOCK

L

N

BLK

BLK

RED

RED

1

BLK BLK

SPARK KILLER

2

GRN&YEL

3

CHASSIS

GRY

RED

1/L1 2/T1

3/L2 4/T2

5/L3 6/T3

RED

CAPACITOR

RED

WHI

PNK

S

R

CAPACITOR

C

BLK

WHI

RED

BLK

FAN MOTOR

C

S

R

COMPRESSOR

COMPRESSOR TERMINAL

MAGNETIC CONTACTOR

− 16 −

FILE NO. SVM-05015

4. SPECIFICATION OF ELECTRICAL PARTS


No.

Parts name

1 Fan motor (for indoor)

2 Thermo sensor (TA-sensor)

3 DC-DC transformer (T01)

4 Microcomputer

Heat exchanger sensor

5

(TC-sensor)

6 Line filter (L01)

7 Diode (DB01)

8 Capacitor (C02)

9 Fuse (F01)

10 Varistor (R21, R22)

11 Resistor (R01)

12 Louver motor

Type

AFP-220-50-4A

———

SWT-47

TMP87CM40AN

Specifications

Output (Rated) 50W, 220-240V

10k

Ω

at 25°C

DC 390V, Secondary DC 12V, 7V

——— 10k

Ω

at 25°C

SS11V-R07190

D3SBA60

19mH, AC0.7A

4A, 600V

KMH400VSSN47M22S 47µF, 400V

TSCR T6.3A, 250V

15G561K

RF-2TK5R6

MP35EA12

560V

5.6

Ω

, 2W

Output (Rated) 2W, 6poles, 4phase,

DC 12V


No.

Parts name Type Specifications

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

1 Compressor 2JS350D5DA02 Winding resistance (

Ω

) C-R C-S

(at 20

°

C) 0.981 2.845


2 Fan motor (for outdoor) KFG6-71SB5P-T3 Winding resistance (

Ω

) Red-Black White-Black

(at 20

°

C) 64.4

127.4

3

Running capacitor

(for fan motor)

451205L AC 450 V, 2

µ

F

4

5

Running capacitor

(for compressor)

Solenoid coil

(for 4-way valve)

BUM44X4505B AC 440 V, 45

VHV (STF)

µ

F

AC 220 – 240 V

6 Thermo sensor

7 Magnetic contactor

8

9

10

11

Transformer

Microcontroller

Varistor (R73, R74, R86)

Fuse (F01)

TE / TD 10 k

Ω

at 25

°

C / 50 k

Ω

at 25

°

C

CLK-26J

220 − 240 V, 50 Hz

TT-05 220 – 240 V

TMP47C840N

15G471K

MT3

470 V

T6.3 A, 250 V

– 17 –

FILE NO. SVM-05015

4-4. Outdoor Unit (RAS-18UAX4, RAS-18UA-E4)

No.



1 Compressor PH340X3C-4KT1 Winding resistance (

Ω

) C-R C-S

(at 20°C) 1.46 2.47


2 Fan motor (for outdoor) WLF-240-42A-1 Winding resistance (

Ω


(at 20°C) 188 289

3

4

Running capacitor

(for fan motor)

Running capacitor

(for compressor)


451155L AC 450 V, 1.5

BUM44X4505B AC 440 V, 45

CLK-26J

µ

µ

F

F

220 – 240 V, 50 Hz

4-5. Outdoor Unit (RAS-18UA-AR4)

No.



1 Compressor PH340X3C-4KTS1 Winding resistance (

Ω

) C-R C-S

(at 20

°

C) 1.23 2.58


2 Fan motor (for outdoor) WLF-240-42B Winding resistance (

Ω


(at 20

°

C) 197 255

3

Running capacitor

(for fan motor)

451205L AC 450 V, 2

µ

F

4

Running capacitor

(for compressor)

SK42CMP45U1-S AC 420 V, 45

µ

F

5 Magnetic contactor CLK-26J 220 – 240 V, 50 Hz

4-6. Outdoor Unit (RAS-18UAX4-T2)

No.



1 Compressor PH290X2C-4FT1 Winding resistance (

Ω

) C-R C-S

(at 20°C) 1.71 3.09


2 Fan motor (for outdoor) KFG6-71SB5P-T Winding resistance (

Ω


(at 20°C) 64.4

127.4

3

4

Running capacitor

(for fan motor)

Running capacitor

(for compressor)

451355L AC 450 V, 3.5

BUM44X3505A AC 440 V, 35

µ

µ

F

F

5 Magnetic contactor CLK-26J 220 – 240 V, 50 Hz

– 18 –

FILE NO. SVM-04008

FILE NO. SVM-05015


No.



1 Compressor 2JS386D5BB02 Winding resistance (

Ω

) C-R C-S

(at 20

°

C) 0.886 1.979


2 Fan motor (for outdoor) KFG6-71SB5P-T1 Winding resistance (

Ω

)

(at 20

°

C)

Red-Black

64.4

White-Black

127.4

3

Running capacitor

(for fan motor)

451355L AC 450 V, 3.5

µ

F

4

Running capacitor

(for compressor)

BUM44X6005C AC 440 V, 60

µ

F

5

Solenoid coil

(for 4-way valve)

VHV (STF) AC 220 – 240 V

6 Thermo sensor TE / TD 10 k

Ω

at 25

°

C / 50 k

Ω

at 25

°

C

7 Magnetic contactor A35 220 − 240

8 Transformer TT-05 220 – 240 V

9 Microcontroller

10 Varistor (R73, R74, R86)

11 Fuse (F01)

TMP47C840N

15G471K

MT3

470 V

T6.3 A, 250 V

4-8. Outdoor Unit (RAS-24UA-E4, RAS-24UAX4)

No.

2

Parts name

Fan motor (for outdoor)

Type

KFG6-71SB5P-T

Specifications

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

1 Compressor Winding resistance ( Ω ) C-R C-S

(at 20 °C)

1.13 2.10


Winding resistance ( Ω ) Red-Black White-Black

(at 20 °C) 64.4 127.4

3

4

Running capacitor

(for fan motor)

Running capacitor

(f or compressor)

451355L

BUM44X4505B

AC 450 V, 3.5µF

AC 440 V, 45µF


A35

220 − 240 V, 50 Hz

– 19 –

FILE NO. SVM-05015

4-9. Outdoor Unit (RAS-24UA-AR4)

No.



1 Compressor PH400X3CS-4KTS1 Winding resistance ( Ω ) C-R C-S

(at 20 °C) 2.32


2 Fan motor (for outdoor) MMF-230-65I Winding resistance (

Ω


(at 20 °C)

139.0

3

4

Running capacitor

(for fan motor)

Running capacitor

(for compressor)

451305L

SK42CMP60U1-S

AC 450 V, 3.5

AC 420 V, 60 µ

µ

F

F

5

Magnetic contactor A35 − 240 V, 50 Hz

– 20 –

FILE NO. SVM-05015

5. REFRIGERATION CYCLE DIAGRAM


T

Indoor unit

Evaporator

Cooling

0.39m

(Connecting pipe)

∅

12.70 mm

0.39m

(Flexible pipe)

∅

12.70 mm

O.D.:12.70 mm

Heating

P

Packed valve

(

∅

12.70)

Cooling

Heating

4-way valve

Multi blade fan

Packed valve

(∅

6.35)

0.49m

(Connecting pipe)

∅

6.35 mm

O.D.:6.35 mm

Capillary tube

∅

0.8x400

S

Heating Cooling

Compressor

2JS350D5A02

Capillary tube

∅

2.0x600

S

Accumulator

Condenser

Cooling

Heating

Propeller fan

Outdoor unit

Dryer

Refrigerant

R-22 1.15kg

Mark ( ) means check points of Gas Leak

50Hz

Standard pressure P

(MPaG)

Surface temp. of heat exchanger interchanging pipe T (°C)

Fan speed

(indoor)

Ambient temp.

conditions DB/WB

(°C)

Indoor Outdoor

Standard 0.3 45.0 High 20/– 7/6

Heating High temperature*1 0.4 ~ 0.6 49.0 ~ 58.0 Low 27/– 24/18

Low temperature 0.3

34.0

High 20/– –10/–10

Standard

Cooling High temperature

Low temperature

0.4

0.5

0.3

10.0

15.0

1.0

High

High

Low

27/19

32/23

21/15

35/24

43/26

21/15

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

*1 : During heating overload, the high temperature limit control operation is included.

– 21 –

FILE NO. SVM-05015

5-2. RAS-18UFP-E4 / RAS-18UA-E4


T

Indoor unit

Evaporator

0.39m

(Connecting pipe)

∅

12.70 mm

0.39m

(Flexible pipe)

∅

12.70 mm

O.D.:12.70 mm

P

Packed valve

(

∅

12.70)

Multi blade fan

0.49m

(Connecting pipe)

∅

6.35 mm

O.D.:6.35 mm

Compressor

PH340X3C-4KT1

Packed valve

(∅

6.35)

Capillary tube

∅

2.0x1400

S

Dryer

Condenser

Propeller fan

Outdoor unit

Refrigerant

R-22 1.17 kg


50Hz

Standard

Cooling High temperature

Low temperature


(MPaG)

0.4

0.5

0.3


10.0

Fan speed

(indoor)

Ambient temp.


(°C)

Indoor Outdoor

High 27/19 35/24

13.0

2.0

High

Low

32/23

21/15


43/26

21/15

– 22 –

FILE NO. SVM-05015


0.39m

(Connecting pipe)

∅

12.70 mm

0.39m

(Flexible pipe)

∅

12.70 mm

O.D.:12.70 mm

P

Packed valve

(

∅

12.70)

Accumulator

Indoor unit

Evaporator

T

Multi blade fan

Packed valve

(∅

6.35)

Capillary tube

∅

0.8x1200

S

Capillary tube

∅

2.0x1000

S

0.49m

(Connecting pipe)

∅

6.35 mm

O.D.:6.35 mm

Compressor PH340X3C-4KTS1

Condenser

Propeller fan

Outdoor unit

Refrigerant

R-22 1.20 kg


50Hz

Standard


(MPaG)

0.4


10.0

Fan speed

(indoor)

Ambient temp.


(°C)

Indoor Outdoor

High 27/19 35/24

Cooling High temperature 0.5 13.0 High 32/23 52/31

Low temperature 0.3

2.0

Low 21/15 21/15


– 23 –

FILE NO. SVM-05015

5-4. RAS-18UFPX4-T2 / RAS-18UAX4-T2

T

Indoor unit

Evaporator

0.39m

(Connecting pipe)

∅

15.88 mm

0.39m

(Flexible pipe)

∅

15.88 mm

O.D.:15.88 mm

P

Packed valve

(

∅

15.88)

Accumulator

Multi blade fan

Packed valve

(∅

6.35)

Capillary tube

∅

2.0x800

S

0.49m

(Connecting pipe)

∅

6.35 mm

O.D.:6.35 mm

Compressor PH290X2C-4FT1

Condenser

Propeller fan

Outdoor unit

Refrigerant

R-22 1.47 kg


50Hz


(MPaG)


Fan speed

(indoor)

Ambient temp.


(°C)

Indoor Outdoor

Standard 0.5 10.0 High 27/19 35/24


Low temperature 0.3

2.0

Low 21/15 21/15


– 24 –

FILE NO. SVM-05015


T

Indoor unit

Evaporator

Cooling

0.39m

(Connecting pipe)

∅

15.88 mm

0.39m

(Flexible pipe)

∅

15.88 mm

O.D.:15.88 mm

Heating

P

Packed valve

(

∅

15.88)

Cooling

Heating

4-way valve

Heating Cooling

Compressor 2JS386D5BB02

Multi blade fan

Capillary tube

∅

1.0x700

S

Packed valve

(∅

6.35)

0.49m

(Connecting pipe)

∅

6.35 mm

O.D.:6.35 mm

Accumulator

Condenser

Dryer

Capillary tube

∅

2.0x1080

S

Refrigerant

R-22 1.75kg

Mark ( ) means check points of Gas Leak Cooling

Heating

Propeller fan

Outdoor unit

50Hz

Standard


(MPaG)

0.4


43.0

Fan speed

(indoor)

High

Ambient temp.


(°C)

Indoor Outdoor

20/– 7/6

Heating High temperature*1 0.5 ~ 0.6 52.0 ~ 59.0 Low 27/– 24/18

Low temperature

Standard

0.3

0.4

36.0

11.0

High

High

20/–

27/19

–10/–10

35/24


Low temperature 0.3

1.0

Low 21/15 21/15

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

*1 : During heating overload, the high temperature limit control operation is included.

– 25 –

FILE NO. SVM-05015

5-6. RAS-24UFP-E4 / RAS-24UA-E4


0.39m

(Connecting pipe)

∅

15.88 mm

0.39m

(Flexible pipe)

∅

15.88 mm

O.D.:15.88 mm

P

Packed valve

(

∅

15.88 )

Cooling

Indoor unit

Evaporator

T

Multi blade fan

Packed valve

(∅

6.35)

0.49m

(Connecting pipe)

∅

6.35 mm

O.D.:6.35 mm

Capillary tube

∅

2.4x1500

S

Compressor PH400X3CS-4KT1

Condenser

Refrigerant

R-22 1.70kg


Propeller fan

Outdoor unit

50Hz

Standard


(MPaG)

0.4


11.0

Fan speed

(indoor)

Ambient temp.


(°C)

Indoor Outdoor

High 27/19 35/24


Low temperature 0.3

1.0

Low 21/15 21/15

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

– 26 –

FILE NO. SVM-05015


0.39m

(Connecting pipe)

∅

15.88 mm

0.39m

(Flexible pipe)

∅

15.88 mm

O.D.:15.88 mm

P

Packed valve

(

∅

15.88 )

Indoor unit

Evaporator

T

Multi blade fan

Packed valve

(∅

6.35)

0.49m

(Connecting pipe)

∅

6.35 mm

O.D.:6.35 mm

Accumulator

Compressor PH400X3CS-4KTS1

Condenser

Capillary tube

∅

2.4x1400

S

Dryer

Refrigerant

R-22 1.70kg


Propeller fan

Outdoor unit

50Hz

Standard


(MPaG)

0.4


11.0

Fan speed

(indoor)

Ambient temp.


(°C)

Indoor Outdoor

High 27/19 35/24

Cooling High temperature 0.6 12.0 High 32/23 52/31*

Low temperature 0.3

1.0

Low 21/15 21/15

* SASO Standard's condition


– 27 –

FILE NO. SVM-05015

6. CONTROL BLOCK DIAGRAM

6-1. RAS-18UFHP-E4, RAS-24UFHP-E4

Heat Exchanger Sensor

Temperature Sensor

Infrared Rays Signal Receiver

Initiallizing Circuit

Infrared

Rays

36.7 kHz

Clock Frequence

Oscillator Circuit

Indoor Unit Control Panel

M.C.U.

8 MHz

Functions

•

Louver Control

•

3-minute Delay at Restart for Compressor

•

Motor Revolution Control

•

Processing

(Temperature Processing)

•

Timer

•

Drain Pump ON/OFF

•

Serial Signal Communication

Power Supply

Circuit

Remote

Control

Louver ON/OFF Signal

Louver Driver

Noise Filter

Serial Signal

Transmitter/

Receiver

Relay

RY401

Hi POWER

Display

FILTER Sign

Display

PRE DEF.

Sign Display

TIMER

Display

OPERATION

Display

Indoor Fan

Motor

Louver Motor

Float

Switch

Drain

Pump

From Outdoor Unit

Serial Signal Communication

REMOTE CONTROL

Remote Control

Operation Mode Selection

AUTO, COOL, DRY, HEAT, FAN ONLY

Temperature Setting

Fan Speed Selection

ON TIMER Setting

OFF TIMER Setting

Louver Auto Swing

Louver Direction Setting

ECO

Hi power

TIMER

1.3.5.9H

COMFORT SLEEP

QUIET

Infrared Rays

– 28 –

FILE NO. SVM-05015

6-2. RAS-18UFP-E4, RAS-18UFPX4, RAS-18UFP-AR4, RAS-18UFPX3-T2,

RAS-24UFP-E4, RAS-24UFPX4, RAS-24UFP-AR4

Heat Exchanger Sensor

Temperature Sensor

Infrared Rays Signal Receiver

Infrared

Rays

36.7 kHz

Initiallizing Circuit

Clock Frequency

Oscillator Circuit

Indoor Unit Control Panel

M.C.U.

8 MHz

Functions

•

Louver Control

•

3-minute Delay at Restart for Compressor

•

Motor Revolution Control

•

Processing

(Temperature Processing)

•

Timer

•

Drain Pump ON/OFF

•

Compressor ON/OFF

Hi POWER

Display

FILTER Sign

Display

FAN-ONLY

Sign Display

TIMER

Display

OPERATION

Display

Indoor Fan

Motor

Power Supply

Circuit

Louver ON/OFF Signal

Driver

Remote

Control

Louver Driver

Noise Filter

Relay

RY04

Relay

RY401

Louver Motor

Float

Switch

Drain

Pump

From Outdoor Unit

Compressor

REMOTE CONTROL

Remote Control

Operation Mode Selection

AUTO, COOL, DRY, FAN ONLY

Temperature Setting

Fan Speed Selection

ON TIMER Setting

OFF TIMER Setting

Louver Auto Swing

Louver Direction Setting

ECO

Hi power

TIMER

1.3.5.9H

COMFORT SLEEP

QUIET

Infrared Rays

– 29 –

FILE NO. SVM-05015

7. OPERATION DESCRIPTION

7-1. Outline of Air Conditioner Control

This is a fixed capacity type air conditioner, which uses a AC motor for an indoor fan. The AC motor drive circuit is mounted in the indoor unit. And electrical parts which operate the compressor and the outdoor fan motor, are mounted in the outdoor unit.

The air conditioner is mainly controlled by the indoor unit controller. The controller operates the indoor fan motor based upon commands transmitted by the remote control and transfers the operation commands to the outdoor unit controller.

The outdoor unit controller receives operation commands from the indoor unit, and operates the outdoor fan motor and the compressor.

(1) Role of indoor unit controller

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

•

T emperature 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

• Transferring of operation commands to the outdoor unit

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

(2) Role of outdoor unit controller

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

• Compressor operation control

• Operation control of outdoor fan motor

Operations according to the commands from the indoor unit

OPERATION

MODE

RAS-18UFHP Series

RAS-18UFP

Series

RAS-24UFHP

Series

RAS-24UFP

Series

• Turning off the compressor and outdoor fan when the outdoor unit receives the shutdown command

• Defrost control in heating operation

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

7-1-1. Louver 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 (AC F an motor)

(1) The indoor fan is operated by the stepless speed change AC motor.

(2) For air flow level, speed of the indoor fan motor is controlled in five steps (LOW, LOW

+

, MED, MED

+ and HIGH). If AUTO mode is selected, the fan motor speed is automatically controlled by the difference between the preset temperature and the room temperature.

LOW

MED

+

+

=

=

LOW+MED

2

MED+HIGH

2

Table 7-1-1

Cooling M

L L

SUL/SL-

Heat

Fan only

Dry rpm

UH H

1120

H

1060

M+

M+

1030

M

970

L+

M

M

950

L

820

L-

L+

L+

800

UL

L

L-

L L- UL SUL

650

600

Air flow volume (m

3

/h) rpm

Air flow v rpm olume (m

3

/h)

−

−

830

1120

830

800

1060

800

1170

770 720

1030

−

−

700

900

680

1000

FAN TAP

−

−

600

820

600

580

800

580

850

450

700

650

450

690

410

600

410

640

Air flow volume (m

3 rpm

/h)

−

930

1210

900

1170

920

1090

760

−

750

1000

−

660

860

650

850

490

700

480

690

440

640

Air flow volume (m

3

/h)

−

930 900 810

−

750

−

660 650 490 480 440

SUL/SL-

500

320

−

−

350

−

−

−

30

−

7-2. Description of Operation Circuit

(1) When turning on the breaker, the operation lamp blinks. This means that the power is on (or the power supply is cut off.)

(2) When pressing [ ] button on the remote control, receiving beep sounds from the indoor unit, and the next operation is performed together with opening the vertical air flow louver.

(3) Once the operation mode is set, it is memorized in the microcomputer so that the previous operation can be effected thereafter simply by pressing

[ ] button.

FILE NO. SVM-05015

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.

°

C

0.5

ON ON

OFF OFF OFF ON

7-2-1. Fan only operation

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

(1) When [FAN] button is set to AUTO, the indoor fan motor operates as shown in Fig. 7-2-1. When

[FAN] button is set to LOW, LOW

+

, MED, MED

+

or

HIGH, the motor operates with a constant air flow.

Preset temp.

0

OPERATION display lamp

°

C

Fig. 7-2-2

Preset temp.

+3

+2.5

+2

+1.5

+1

+0.5

0

(Preset temp.: 24°C)

NOTE :

*1: The values marked with *1 are calculated and controlled by the difference in motor speed between M+ and L–.

(2) The Hi POWER, ECO and COMFORT SLEEP operation cannot be set.

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

M+

*1

*1

*1


[FAN] button is set to LOW, LOW + , MED, MED + or


Preset temp.

°

C

+3

+2.5

+2

+1.5

+1

+0.5

0

-0.5

M+

*1

*1

*1

NOTE :

*1: The values marked with *1 are calculated and controlled by the difference in motor speed between M+ and L–.


– 31 –

7-2-3. Dry operation

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


Fig. 7-2-4.

FILE NO. SVM-05015

7-2-4. Heating operation *

Heat pump model only

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


Fig. 7-2-6.

°C

°C

+3

ON:6min. OFF:4min.

ON:6min. OFF:4min.

Preset temp.

0

+2

+1

Preset temp.

0

ON:5min. OFF:5min.

OFF

ON:5min. OFF:5min.

ON

OFF OFF

0.5

OFF ON OFF

ON

ON ON

OPERATION display lamp

Fig. 7-2-4

Fig. 7-2-6

(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.

R oom temp.


[FAN] button is set to LOW, LOW

+

, MED, MED

+

or


Preset temp.

°

C

0

-0.5

-1

-1.5

-2

L

*1

*2

Preset temp.+1

Preset temp.

M+

Compressor

Outdoor fan

ON

OFF

ON

OFF

ON

OFF

ON

-5.0

-5.5

[FAN AUTO]

H

Indoor fan

L.

*S.L.

*Super Low

L.

S.L.

L.

S.L.

L.

Fig. 7-2-5

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

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

*1, *2 : The values marked with *1 and *2 are calculated and controlled by the difference in motor speed between M+ and L.


– 32 –

(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.

46

45

34

33

33 21

32 20

*2 A+4 A+4

A-8 A-8

AUTO

Manual

(One of

5 speed)

*4

SUL*

3

L-H

(Up to setting speed)

SUL*1

Stop

FILE NO. SVM-05015

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.

*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.

°

C

+4

Cooling operation

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

Cooling operation

0

Fan only operation

-1

Fig. 7-2-8 Cold draft preventing control

Heating operation

*5 and *6:

Table 7-2-1

RAS-18UFHP-E4

RAS-24UFHP-E4

RAS-18UFP-E4, RAS-18UFPX4,

RAS-18UFPX4-T2, RAS-18UFP-AR4,

RAS-24UFP-E4, RAS-24UFPX4,

RAS-24UFP-AR4

Fan speed

AUTO

*5

Starting period

•

Up until 12 minutes passed after starting the unit

•

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

Manual

•

Room temperature

(L – H) < Preset temperature

–4°C

*6

Stabilized period

•

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

•

25 minutes or more passed after starting the unit

•

Room temperature

Preset temperature

–3.5°C

Fig. 7-2-9

– 33 –

FILE NO. SVM-05015

7-3. Hi PO WER Mode

([Hi PO WER] b contr utton on the remote ol is pressed.)

When [Hi PO WER] b utton is pressed while the indoor unit is in A uto , Cooling or Heating oper ation, Hi

PO WER mar k is indicated on the displa y of the remote control and the unit oper ates as f ollo ws .

(1) A utomatic operation

·

The indoor unit oper ates in according to the current operation.

(2) Cooling operation

•

The setting temperature drops 3°C.

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

•

If the room temperature is higher than the setting temperature by 3.5°C or more, the horizontal louver moves to the Hi POWER position automatically. Then when the room temperature is 1°C less than the setting temperature the horizontal louver returns automatically.

•

FAN speed : [AUTO]

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

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

•

FAN speed : One of 5 levels

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

(3) Heating operation

·

The preset temper ature increases 2 °C,

(The v alue of the preset temper ature on the

· remote control does not change .)

The indoor unit oper ates in nor mal heating mode e xcept the preset temper ature is higher

(+2 °C).

(4) The Hi PO WER mode can not be set in Dr y or F an only operation.

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.

Compressor Outdoor fan

OFF

ON

ON

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

(

°

C)

6

2

OFF

OFF

ON

Fig. 7-4-1

Fig. 7-5-1

7-6. Defrost Operation *

Heat exchanger temp.

(

°

C)

60

55

52

Compressor Outdoor fan

ON

Less than continues for 5 minutes

OFF

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.

– 34 –

7-6-1.

Defrost starting condition

A-Zone : If -10°C > Teo

≥ −

18°C, defrost will start when.

Teo - Te

≥

2.5°C at teat 20 sec or

~ 30 min after operation.

B-Zone : If Te

≤ −

18°C, defrost start instantaneously

(Suddenly) 00 ~ 25 min ofter operation

C-Zone : If -2ºC

≥

Teo

≥ −

10°C defrost will start when

Teo - Te

≤ −

3°C at least 20 sec or ~ 60 min after operation.

FILE NO. SVM-05015

7-6-2. Defrost finish condition.

1) If Te

≥

3°C at least 60 sec -->4 way value on.

2) If Te

≥

8°C --> 4 way value on.

Timing

Operation time (4 Loops = Tt)

Td1

Td2 Td3 Td4

Start time record

Defrost time rate : (Td/Tt) x 100

Heating time rate : (Tt - Td) x Tt

Finish time record

Fig. 7-6-2

-

35

-

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.

FILE NO. SVM-05015

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

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

than three seconds.

Hi POWER FILTER PRE.D

TEMPORARY button

0

3S

Motions

The unit starts to operate.

The green lamp is on.

After approx. three seconds,

The unit beeps three times and continues to operate.

The lamp changes from green to orange.

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

Push [TEMPORARY] button for more The unit is in operation.

than three seconds.

Motions

The green lamp is on.


0

3S

The unit stops operating.

The green lamp is turned off.


The unit beeps three times.

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 automatically before shutting down.

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

– 36 –

FILE NO. SVM-05015

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

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

than three seconds.


TEMPORARY button

0

3S

Motions

The unit starts to operate.

The orange lamp is on.


The unit beeps three times and continues to operate.

The lamp changes from orange to green.

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

Push [TEMPORARY] button for more The unit is in operation.

than three seconds.

Motions

The orange lamp is on.


0

3S

The unit stops operating.

The orange lamp is turned off.


The unit beeps three times.

TEMPORARY button

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

•

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

7-7-3. Power failure during timer operation

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

7-8. Filter Check Lamp

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

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

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.

– 37 –

FILE NO. SVM-05015

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 system reduces moisture in the coil. When air conditioner is turned off, the internal fan activates and dries the moisture in the coil for 20 minutes, then it turns off automatically.

Operation display

FCU fan

FCU louver

Timer display

Compressor

CDU fan

ON OFF

ON ON rpm is depend on presetting. rpm is SL speed.

CLOSE OPEN

ON or OFF depend on presetting of timer function.

ON

ON or OFF depend on presetting per room temperature.

ON or OFF depend on presetting per room temperature.

OFF

OFF

OFF

OFF

CLOSE

ON or OFF depend on presetting of timer function.

OFF

OFF

Cool mode or dry mode operation more than 10 mins.

8 8

Self-Cleaning mode operate 20 mins.

Automatically turn-off.

Turn off by remote controller or timer-off function.

•

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

•

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

-

Operation time

7-9-1. How to cancel Self-Cleaning function 7-9-2. How to set Self-Cleaning function.

To cancel the Self-Cleaning function, proceed as follows:

•

Press [TEMPORARY] button one time or use remote control to turn on air conditioner. The OPERATION display will show in orange 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] button is pressed but keep holding it continue. Then will beep 3 times in the first

3 seconds but it is not related to Self-Cleaning function)

•

After holding about 20 seconds, the air conditioner will beep 5 times without any blinking of display.

•

The Self-Cleaning Operation had been cancelled.

To set the Self-Cleaning function, proceed as follows.

•

Press [TEMPORARY] button one time or use remote control to turn on air conditioner. The OPERATION display will show in orange color (When AUTO-

RESET 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] button is pressed but keep holding it continue. Then will beep 3 times is the first

3 seconds but it is not related to Self-Cleaning function)

•

After holding about 20 seconds, the air conditioner will beep 5 times and OPERATION display blinks

5 times.

•

The Self-Cleaning function had been set.

Remarks

•

Per setting of Self-Cleaning function above, AUTO-

RESTART function had been cancelled. To set

AUTO-RESTART again, please follow item 7-8-1.

Remarks

•

Per setting of Self-Cleaning function above, AUTO-

RESTART function had been cancelled. To set

AUTO-RESTART again, please follow item 7-8-1.


TEMPORARY button

– 38 –

0

3S

FILE NO. SVM-05015

7-10. QUIET Mode

Quiet mode is the system which, control the revolving speed of indoor fan to work constantly at lower than speed L. In addition, noise level of indoor unit is less than usual.

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

- until the [QUIET] button is pressed once again (cancel Quiet mode).

Remarks :

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

2. Quiet mode is appropriate to work with less cooling load and less heating load condition.

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

7-11-1. Cooling mode

•

The fan speed of indoor unit operates automatically, it relates with the compressor's operation.

Compressor’s Operation Fan Speed

ON

L-

OFF SL

•

The preset temperature will increase 1°C after the

Comfort sleep mode has operated for 1 hour and the temperature will increase another 1°C after the comfort sleep mode has operated for 2 hour. (The value of the preset temperature on the remote control does not change.)

•

Press the [COMFORT SLEEP] button to choose the operating hours. Repeat pressing to select the hours.

(1hr, 3hr, 5hr or 9hr)

•

If the [COMFORT SLEEP] button is pressed again means cancel comfort sleep mode.

7-11. COMFORT SLEEP mode

The principles of comfort sleep mode are:

•

Quietness for more comfortable.

•

Save energy by changing room temperature automatically.

•

The air condition can shut down by itself automatically.

7-11-2. Heating mode

•

The fan speed of indoor unit operates automatically, it relates with the compressor's operation.

Compressor’s Operation Fan Speed

ON L-

OFF SL

Remarks:

1. Comfort sleep mode will not operate in dry mode and fan only mode.

2. Comfort sleep mode is appropriate to work with less cooling load and less heating load condition.

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

•

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

dose not change.)

•

Press the [COMFORT SLEEP] button to choose the operating hours. Repeat pressing to select the hours.

(1hr, 3hr, 5hr or 9 hr)

•

If the [COMFORT SLEEP] button is pressed again means cancel comfort sleep mode.

-

39

-

FILE NO. SVM-05015

8. INSTALLATION PROCEDURE

8-1. Safety Cautions

For general public use

Power supply cord of outdoor unit should be more than 4 mm 2 (H07RN-F or 245 IEC66: polychloroprene sheathed flexible cord) or 3.5 mm 2 (AWG-12)

CAUTION

To Disconnect the Appliance from the Main Power Supply

This appliance must be connected to the main power supply by means of a circuit breaker or a switch with a contact separation of at least 3 mm.

If this is not possible, a power supply plug with earth must be used. This plug must be easily accessible after installation. The plug must be disconnected from the power supply socket in order to disconnect the appliance completely from the mains.

DANGER

•

FOR USE BY QUALIFIED PERSONS ONLY.

•

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

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

•

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

WRONGLY, ELECTRIC PARTS MAY BE DAMAGED.

•

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

•

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

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

•

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

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

FURNACE, STOVES, ETC.

•

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

CAREFUL NOT TO GET THE SPECIFIED REFRIGERANT (R-22) 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 instructions for proper installation.

– 40 –

FILE NO. SVM-05015

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, 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.

– 41 –

FILE NO. SVM-05015

8-2. Installation Diagram of Indoor and Outdoor Units

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

(Under Ceiling Installation) (Console Installation)

Hook

1

Installation

200 mm or more

8

Mounting screw

70 mm or more

200 mm or more

Before install the wireless remote control

2

Wireless remote control

22222 Wireless remote control

Cover

33333 Batteries

Insulate the refrigerant pipes separately with insulation, not together.

6

Bio-enzyme & Gingko filter

9

Pan head

4

Remote control

Air filter

5

Filter frame

7

Sasa zeolite plus filter

6 m m thick heat resisting polyethylene foam

600

mm

or mo re

100 m m or m ore

Extension drain hose

Extension drain hose

(Not available, provided by installer)

Electric cover

100 m m or m ore

600

mm

or m ore

Loop the connective cable

(about 100 mm in diameter and 300 − 350 mm long).

100

mm

or m ore carrying out a drainage test.

Saddle

100 m re m drain hose


600 m


m or m ore

600

mm

or mo re

Vinyl tape Apply a drainage test

100 mm or m ore

Saddle




Electric parts cover

600 m re m

24 Class

Loop the connective cable

(about 100 mm in diameter and 300 − 350 mm long).

– 42 –

FILE NO. SVM-05015

8-3. Installation

8-3-1. Optional installation parts

Part

Code

A

B

C

Parts name Q'ty

Refrigerant piping

Liquid side :

∅

6.35 mm

Gas side :

∅

12.70 mm (RAS-18UF)

:

∅

15.88 mm (RAS-24UF,

RAS-18UFPX4-T2)

Pipe insulating material

(polyethylene foam, 6 mm thick)

One each

1

Putty, PVC tapes

One each

<Fixing bolt arrangement of outdoor unit>

RAS-18UAH-E4

600 mm

Air inlet

120 mm

Air outlet

Drain outlet

Fig. 8-3-1

RAS-18UAX4-T2, RAS-24UAH-E4, RAS-24UA-E4,

RAS-24UAX4, RAS-24UA-AR4

600 mm

Air inlet

120 mm

RA S-18UA-E4, RAS-18UAX4, RAS-18UA-AR4

32.5 mm

115 mm

Æ

30

125 mm

Air inlet

Air outlet

600 mm

90 mm

Drain outlet

Air outlet

Drain outlet

Fig. 8-3-2

F ig. 8-3-3

•

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

•

Use

∅

8 mm or

∅

10 mm anchor bolts and nuts.

•

If it is necessary to drain the defrost water, attach Drain nipple

!

to the bottom plate of the outdoor unit before installing it.

– 43 –

8-3-2. Accessory and installation parts

Part

No.

Part name (Q'ty)

Part

No.

1

Installation plate x 1


5

Filter frame x 2

2

Wireless remote control x 1

FILE NO. SVM-05015

Part

No.


9

Pan head wood screw

∅

3.1 x 16 s

x 2

6

Bio-enzyme & Ginglo filter x 1

!

Drain nipple x 1 (Packaged with the outdoor unit)

3

Battery x 2

7

Sasa zeolite plus filter x 1

"

Flexible pipe x 1

4 8

Remote control holder x 1 Mounting screw

∅

4 x 25 s

x 8

Others : Owner's manual, Installation manual

#

Pipe shield x 1

– 44 –


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.

Wall

FILE NO. SVM-05015

<Remote control usage>

•

Under Ceiling Installation

Ceiling

7 m

Remote control

Reception range

CAUTION

•

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

•

The microprocessor in the indoor unit should not be too close to RF noise sources.

(For details, see the owner's manual.)

5 m

5 m

<Remote control>

•

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

•

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

•

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

•

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

Reception range

Remote control

* Axial distance

•

Console Installation

Fig. 8-4-1

7 m

Reception range

Remote control

Wall

Floor

– 45 –

5 m

5 m

Reception range

Remote control

* Axial distance

Fig. 8-4-2

NOTICE

The Paper pattern is inside the package box cover.

Do not bend and dispose of it before installing.

8-4-2. Before installation

<Remove the Air inlet grille>

1. Open the Air inlet grille with both hands.

2. Loosen three screws for fixing the Panel arm.

Do not remove the screws at this time.

1

2

2

1

8-4-3. After installation

FILE NO. SVM-05015

<Install the Air inlet grille>

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

Panel arm

Screw

Panel arm

Fig. 8-4-3

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

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

5. Remove the Panel arms from the Front panel.

Panel arm

3

Grille stopper

3

5

CAUTION

Fig. 8-4-5

•

The screws that fixed with Panel arms must not be loose.

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

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

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

Air inlet grille arm

Axis of the

Front panel

Fig. 8-4-4

Rib

Fig. 8-4-6

– 46 –

8-4-4. Under ceiling installation

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

<Install the Suspension bolts>

•

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

240 mm or more

1093

1015

FILE NO. SVM-05015

<Install the indoor unit>

1. Remove the Side covers and the Installation plate

1

.

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

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

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

5. Attach the Side covers to the unit.

140

Fig. 8-4-7

•

Adjust distance to ceiling before installation.

Suspension bolt

Side cover

4

2

3

1

Installation plate

Suspension bolt

Suspension bolt

Washer

Spring washer

Nut (M10)

Spring washer

Washer

Nut (M10)

Side cover

Nut (M10)

Suspension bolt (M10)

Fig. 8-4-9

<Condition for installation>

•

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

15 mm

Fig. 8-4-8

15 mm

Fig. 8-4-10

– 47 –

<Piping and Drain hose installation>

•

The piping direction can be 4 ways as illustrated.

•

The Drain hose is only one way.

Upper piping

FILE NO. SVM-05015

•

Rear side piping with Drain hose. (Recommended direction)

Ceiling

175 mm or more

Rear piping hole

∅

80

140 mm

Ceiling

Wall

Rear upper piping

Side piping

Rear piping Drain hose

Fig. 8-4-11

•

How to install the Drain hose.

1. Remove the two screws and the Drain band.

2. Cut a slit for the drain hose hole.

Fig. 8-4-14

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

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

Cut

Slit for drain hose hole

Drain band

Screws

Fig. 8-4-12

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

Fig. 8-4-15

•

Other direction piping.

1. Cut the slit of connecting only upper direction.

Slit for upper piping

Fig. 8-4-13

Cover for side piping

Cover for rear upper piping

Drain hose

Fig. 8-4-16

2. Connect the Flexible pipe

"

to the large pipe (Gas side).

Big pipe

"

Flexible pipe

Fig. 8-4-17

– 48 –

8-4-5. Console installation

•

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

[F position].

FILE NO. SVM-05015

<Install the indoor unit>

•

Install the Installation plate

1

at the wall according to the Paper pattern .

•

Hang the indoor unit on the hooks of the Installation plate

1

.

•

Fix the lower portion of the indoor unit with Mounting screws

8

(2 places).

Indoor unit

Hook

Installation plate

Fig. 8-4-18

<Cutting a hole and mounting the installation plate>

•

When installing the rear piping, determine the pipe hole position, drill the pipe hole (

∅

80 mm) at a slight downward slant to the outdoor side.

•

For mounting of the Installation plate

1

, use the Paper pattern, which is inside the package box cover.

1093

742

375 mm or more

Floor

Fig. 8-4-19

140

Rear piping hole.

∅

80

Mounting screw

8

Mounting screw

Fig. 8-4-21

<Condition for installation>

•

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

15 mm

Anchor bolt

Projection

15 mm or less

5 mm dia. hole

Mounting screw

∅

4 x 25

s

Clip anchor

(local parts)

Fig. 8-4-20

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

8

.

NOTE:

•

Secure four corners and lower parts of the Installation plate

1

with 6 to 8 mounting screws to install it.

– 49 –

Fig. 8-4-22

<Piping and Drain hose installation>

•

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

•

Each piping direction should be connected with the

Flexible pipe

"

.

FILE NO. SVM-05015

8-4-6. Wiring connection

<How to connect the connecting cable>

Terminal cover

Screws

Cord clamp

Earth terminal

Rear piping

Side piping

Bottom piping

Fig. 8-4-23

•

Cut or remove the determined direction slit or cover.

1. Remove the Terminal cover and the Cord clamp.

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

3. Insert the connecting cable fully into the Terminal block and secure it tightly with the screw.

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

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

5. Fix the Terminal cover.

Slit for upper piping

Fig. 8-4-25

Cover for side piping

<Stripping length of the connecting cable>

Cover for rear upper piping

Fig. 8-4-24

50

40

Earth line

Fig. 8-4-26

NOTE:

Use strand wire only.

•

Wire type : More than 1.5 mm

2

(H07RN-F or 245

IEC66) or 1.3 mm

2

(AWG-16)

Fig. 8-4-27

NOTE:

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

– 50 –

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

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

#

.

<How to install the Pipe shield>

1. Cut the Pipe shield

#

to appropriate length.

2. Set the Pipe shield

#

.

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

4. Fix the Pipe shield

#

with vinyl tape.

Slit

Vinyl tape

FILE NO. SVM-05015

8-4-8. Drainage

1. Run the Drain hose sloping downward.

NOTE:

•

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

Under Ceiling Installation Console Installation

#

Pipe shield

Fig. 8-4-28

50 mm or more

50 mm or more

Fig. 8-4-29

NOTICE

In the case of upward drainage from the unit,

(Under Ceiling Installation), it is necessary to use

Drain pump kit of optional part.

CAUTION

1. Do not raise the Drain hose.

2. Do not put the Drain hose into water.

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

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

2. Open the louver manually and put some water into it.

Then check the flow of water from the Drain hose.

Fig. 8-4-30

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

Pipe shield.

Pipe Shield

– 51 –

Drain hose

Inside the room

Fig. 8-4-31


CAUTION

Arrange the drain pipe for proper drainage from the unit.

Improper drainage can result in dew-dropping.

(Provided by customer)

8-5. Outdoor Unit

8-5-1. Installation place

•

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

•

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

•

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

•

A place which is not exposed to a strong wind.

•

A place free of a leakage of combustible gases.

•

A place which does not block a passage.

•

When the outdoor unit is to be installed in an elevated position, be sure to secure its feet.

•

An allowable length of the connecting pipe is up to

15 m (Refer to the table of TO CHARGE

REFRIGERANT for detail.)

•

An allowable height level is up to 8 m.

•

A place where the drain water does not raise any problem.

FILE NO. SVM-05015

8-5-2. Refrigerant piping connection

1. Cut the pipe with a pipe cutter.

90°

Die

Obliquity

Fig. 8-5-2

Pipe

Fig. 8-5-3

A

Roughness

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

CAUTION

1. Install the outdoor unit without anything blocking the air discharging.

2. When the outdoor unit is installed in a place always exposed to strong wind like a coast or on a high storey of a building, secure the normal fan operation using a duct or a wind shield.

3. Especially in windy area, install the unit to prevent the admission of wind.

4. Installation in the following places may result in trouble.

Do not install the unit in such places.

•

A place full of machine oil.

•

A saline-place such as the coast.

•

A place full of sulfide gas.

•

A place where high-frequency waves are likely to be generated as from audio equipment, welders, and medical equipment.

Projection margin in flaring : A (Unit : mm)

A

Outer dia.

of copper pipe

Rigid Imperial

6.35

12.70

15.88

1.0 to 1.5

1.0 to 1.5

1.0 to 1.5

1.5 to 2.0

2.0 to 2.5

2.5

Warp

Strong wind

Fig. 8-5-1

– 52 –

FILE NO. SVM-05015

<Tightening connection>

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

8-5-3. Evacuating

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

CAUTION

•

Do not apply excess torque, otherwise the nut may crack depending on the conditions.

AIR PURGE

Evacuate the air in the connecting pipes and in the indoor unit using vacuum pump. Do not use the refrigerant in the outdoor unit.

For details, see the manual of the vacuum pump.

•

Outer dia.

of copper pipe

∅

6.35 mm

∅

12.70 mm

∅

15.88 mm

Tightening torque

16 to 18 (1.6 to 1.8 kgf·m)

50 to 62 (5.0 to 6.2 kgf·m)

65 to 80 (6.5 to 8.0 kgf·m)

Tightening torque of flare pipe connections

Fig. 8-5-4

(Unit : N·m)

Flare at outdoor unit side

<Using a vacuum pump>

Be sure to use a vacuum pump with counter-flow prevention function so that inside oil of the pump does not flow backward into pipes of the air conditioner when the pump stops.

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

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

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

4. Operate the vacuum pump to start for evacuating.

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

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

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

7. Remove the charging hose from the service port.

8. Securely tighten the caps on the packed valves.

Half union Flare nut

Compound pressure gauge

Pressure gauge

Externally threaded side

Internally threaded side

-101kPa (-76cmHg)

Manifold valve

Use a wrench to secure.

Use a torque wrench to tighten.

Handle Lo

Handle Hi

(Keep full closed)

Fig. 8-5-5

Charge hose

Charge hose

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).

Connecting pipe

Vacuum pump adapter for counter-flow prevention

Vacuum pump

Packed valve at gas side

Service port

(Valve core (Setting pin))

Packed valve at liquid side

Fig. 8-5-6

– 53 –

FILE NO. SVM-05015

8-5-4. Wiring connection

TO CHARGE REFRIGERANT

No need to charge refrigerant

Need to charge refrigerant

18 Class

15 m or less

Over 15 m up to

20 m (20g/m)

24 Class

15 m or less

Over 15 m up to

25 m (30g/m)

<Packed valve handling precautions>

•

•

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

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

1. Remove the electric parts cover from the outdoor unit.

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

3. When connecting the connecting cable to the outdoor unit terminal, make a loop as shown in the installation diagram of indoor and outdoor unit, to prevent water coming in the outdoor unit.

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

<Stripping length of connecting cable>

Pipe side

Gas side

(∅15.88 mm.)

Gas side

(∅12.70 mm.)

Liquid side

(∅6.35 mm.)

Service port

Tightening torque

65 to 80 N·m

(6.5 to 8.0 kgf·m)

50 to 62 N·m

(5.0 to 6.2 kgf·m)

16 to 18 N·m

(1.6 to 1.8 kgf·m)

9 to 10 N·m

(0.9 to 1.0 kgf·m)

A

5 mm.

4 mm.

Same as

Gas side

Earth line

Cord clamp

Terminal block

1

2

3

Screw

Terminal block

Earth line

Screw

Cord clamp

• Hexagonal wrench : A (Unit : mm)

supply cord

Fig. 8-5-8

Connecting cable

Hexagonal wrench is required.

A

L N

1 2 3

60

70

60

70

Fig. 8-5-7

Earth line

Power supply cord

Fig. 8-5-9


Power source

Maximum running current

Plug socket & fuse rating

Power cord

18 Class

16A

20A

24 Class

50 Hz, 220 − 240 V Single phase

18A

4 mm

2

(H07RN-F or 245 IEC 66) or 3.5 mm

2

(AWG-12)

−

54

−

Power source

Maximum running current

Plug socket & fuse rating

RAS-18UFPX4-T2 / 18UAX4-T2 RAS-24UFPX4-T / 24UAX4-T

50 Hz, 220 V Single phase

16A

20A

18A

Power cord

4 mm 2 (H07RN-F or 245 IEC 66) or 3.5 mm 2

(AWG-12)

FILE NO. SVM-05015

8-6. How to Set Remote Control Selector

Switch

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

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.

<Remote control selector switch>

•

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

•

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

NOTE :Connection cable

•

Wire type : More than 1.5 mm 2 (H07RN-F or 245

IEC66) or 1.3 mm

2

(AWG-16)

1. Set the remote control selector switch with the indoor unit.

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

2) Remove the Air inlet grille. (Refer to page 47, 8-4-2)

Fig. 8-6-1

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

Fig. 8-6-2

– 55 –

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.

FILE NO. SVM-05015

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

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

Please follow the installation manual of Drain pump kit

(TCB-DP10CE) attachment.

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.

300 mm

•

To reset the switch to the [A] setting, press the

[MODE] button again while pressing the [CHECK] button.

Drain pump kit

Fig. 8-7-1

[MODE] button

[CHK] button

Fig. 8-6-3

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

– 56 –

8-8. Others

8-8-1. Gas leak test


D

C

Flare nut connections

(Indoor unit)

A

Valve stem cap connection

Flare nut connections

(Outdoor unit)

B

Service cap connection

Valve stem cap connection

Fig. 8-8-1

•

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

8-8-2. Test operation

To switch the TEST RUN (COOL) mode, press

TEMPORARY button for 10 sec.

(The beeper will make a short beep.)


TEMPORARY button

Fig. 8-8-2

8-8-3. Auto restart setting

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

Information

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

<How to set the auto restart>

•

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

•

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

– 57 –

FILE NO. SVM-05015

FILE NO. SVM-05015

9. TROUBLESHOOTING CHART

9-1. Troubleshooting Procedure

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

9-2-1. Power supply voltage

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

9-2-2. Incorrect cable connection between indoor and outdoor units

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).

9-2-3. Program control

The microcomputer operates as shown in Table 9-2-1 to control the air conditioner. If there are any operational problems, check whether or not the problems correspond to Table 9-2-1. If they correspond to the

Table, they are not problems with the air conditioner, but they are indispensable operations to control and maintain the air conditioner properly.

No.

1

2

3

4

5

6

7

8

9

10

Table 9-2-1

Operation of Air Conditioner Descriptions

When the main power supply is turned on, the OPERATION lamp on the indoor unit blinks.

The indoor fan motor speed does not change in the Dry operation.

The OPERATION lamp blinks to indicate that power is turned on.

If the [ ] button is pressed, the lamp stops blinking.

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

The compressor is not turned off even though the room temperature is in the range that the compressor is turned off.

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.

The compressor is not turned on and off even though the thermo control is operated in the

Dry operation.

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 when the

Heating operation starts.

The outdoor fan motor stops in the Heating operation.

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

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.

The operation mode changes in the Automatic operation.

In Automatic operation, the room temperature is detacted every

15 minutes and the operation mode is changed according to difference between the room temperature and the preset temperature.

The Fan only operation continues in the

Automatic operation.

The Hi-POWER operation does not work.

When the room temperature is in the range (Preset temperature

± 1°C), the Fan only operation is selected.

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

– 58 –

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

FILE NO. SVM-05015

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.

Lamps

A

E

F

OPERATION lamp is blinking. (1Hz)

B OPERATION lamp is blinking. (5Hz)

C OPERATION lamp is blinking. (5Hz)

D OPERATION lamp is blinking. (5Hz)

OPERATION lamp is blinking. (5Hz)

OPERATION and TIMER lamps are blinking.

(5Hz)

G OPERATION, TIMER and PRE-DEF.

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

H OPERATION, TIMER and PRE-DEF.

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

Table 9-3-1

Self-diagnosis

Power failure (when the power supply is turning on)

Thermo sensor (TA) short or break

Heat exchanger sensor (TC) short or break

Indoor fan motor lock or failure

Indoor P.C. board failure

Wrong wiring of connecting cable

•

Gas shortage or other refrigerant cycle trouble

•

Heat exchanger sensor open, break or short

•

Overload relay or thermostat trouble of compressor

Cycle failure

Symptom

The remote control does not work.

The outdoor fan does not rotate.

Table 9-3-2 Diagnosis by detective operation

Check

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

The compressor operates.

The remote control still does not work.

The remote control works.

Primary judgement

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

OK.

The compressor does not operate.

The outdoor unit (Outdoor fan motor) is defective.

An internal part of the compressor is defective.

– 59 –

FILE NO. SVM-05015

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 5 Hz and it will beep for 10 seconds (Pi, Pi, Pi....). The timer lamp usually blinks (5 Hz) during the self-diagnosis.

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

(1) Press [CHK] button with a tip of pencil to set the remote control to the service mode.

•

“00” is indicated on the display of the remote control.

•

The timer lamp on the indoor unit blinks continuously. (5 times per 1 sec.)

(2) Press [TIMER

8

] button.

If there is no fault with a code, the indoor unit will beep once (Pi) and the display of the remote control will change as follows:

00 01 02 1d 1E 22

•

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

as shown in Table 9-4-1.

•

Press [TIMER

9

] button to change the check code backwards.

If there is a fault, the indoor unit will beep for 10 seconds (Pi, Pi, Pi...).

Note the check code on the display of the remote control.

•

2-digits alphanumeric will be indicated on the display.

•

All lamps on the indoor unit will blink. (5 times per 1 sec.)

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

•

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

•

Alphanumeric characters are used for the check code.

is 5.

is A.

is C.

is 6.

is B.

is D.

* This illustration is only for Heat pump model.

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

(4) Press [ ] button to release the service mode.

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

– 60 –

FILE NO. SVM-05015

Block level

Check code

Block

Indoor

P.C. board

Cable connection

Check code

Diagnosis function

Symptom

The indoor thermo sensor (TA) is defective.

Disconnection or short-circuit

Unit status

Operation continues.

The indoor heat exchanger sensor (TC) is defective.


Table 9-4-1

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


All off


All off

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.


Condition

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






Outdoor

P.C. board

Other parts

(including compressor)

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).


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

2. Check the indoor fan motor.



(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.

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

The outdoor thermo sensor (TE) is defective.


The outdoor heat exchanger (TD) sensor is defective.


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


All off

All off

Operation continues

.

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. And it returns to the normal condition when recovering from errors.

The discharge temperature is over 120°C.

The IOL operation is defective.

All off

All off

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


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

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

− 61 −

9-5. How to Diagnose Faulty Parts

[04 Serial signal error]

FILE NO. SVM-05015

Operation

Check item

Conceivable principle cause

Measure

Item by symptoms

Does outdoor unit operate?

YES

NO

Are 1, 2 and 3 crossover wires connected properly?

YES

NO

NO

Is connector connected properly?

YES

NO

Does LED (Orange) on outdoor P.C. board blink?

YES

Does LED (Green) on outdoor P.C. board blink?

YES

NO

Outdoor P.C. board is defective.

Indoor P.C. board is defective.

Connect crossover wires properly.

Connect crossover properly.

Replace

P.C. board.

Replace

P.C. board.

[08 Four-way valve error]

Does four-way valve operate properly?

YES

NO

Does coil terminal have 220 – 240 V in heating operation?

NO

YES

NO

Are circuit wires normal?

YES

NO

Is outdoor P.C. board normal?

YES

Is TC sensor resistance value (10k

Ω

at 25°C) normal?

NO

YES

Four-way valve is defective.



Replace

Four-way valve

Circuit check/modification

Replace

P.C. board.

Replace

P.C. board.

Replace TC sensor.

– 62 –

FILE NO. SVM-05015

[09 Other cycle error] (1)

NO

Replace TC sensor.

YES

Connect TC sensor properly.

Does compressor operate?

YES

Is compressor turned off shortly?

NO

Is TC sensor resistance value

(10k

Ω

at 25°C) normal?

YES

NO

YES

Is TC sensor disconnected from the sensing element?

NO

Does inner overload relay

(in compressor) operate?

NO

YES

Is circuit wiring normal?

YES

NO

Is outdoor

P.C. board normal?

NO

YES

Check charged amount of refrigerant.

Check defective overload.

Check compressor.

is defective.

Failure

Replace compressor.

Wiring check/modification


Indoor P.C. board

Replace

P.C. board.

Replace

P.C. board.

[09 Other cycle error] (2)

Connect connector properly.

Replace condenser.

Replace fan motor.

NO

NO

NO

Is connector connected properly?

YES

NO

Does indoor fan operate?

YES

Are filters clogged?

YES

Is condenser normal?

YES

NO

Is TC sensor resistance value (10k

Ω at 25°C) normal?

NO

YES

NO

Is charged amount of refrigerant normal?

YES

Is indoor fan motor normal?

YES

YES

Is outside air low load?

NO


Anti-freezing operation

Anti-freezing operation

– 63 –

Clean filters.

Replace

TC sensor.

Charge refrigerant.

Replacd

P.C. board.

[0C Indoor TA sensor error]

Is CN03 (TA sensor connector) connected properly?

YES

NO

NO

Is TA sensor resistance value

(10 k

Ω

at 25°C) normal?

YES

[0d Indoor TC sensor error]

Is CN01 (TC sensor connector) connected properly?

YES

NO

Is TC sensor resistance value

(10 k

Ω

at 25°C) normal?

YES

NO



[18 outdoor TE sensor error]

Is TE sensor connector connected properly?

YES

NO

Is TE sensor resistance value

(10 k

Ω

at 25°C) normal?

YES

NO


– 64 –

FILE NO. SVM-05015

Connect CN03 properly.

Replace TA sensor.

Replace P.C. board.

Connect CN01 properly.

Replace TC sensor.

Replace P.C. board.


Replace TE sensor.

Replace P.C. board.

FILE NO. SVM-05015

[19 outdoor TD sensor error]

Is TD sensor connected properly?

YES

NO

Is TD sensor resistance value

(50 k

Ω

at 25°C) normal?

YES

NO


Replace TD sensor.


Replace P.C. board.

[1E Discharge temp. error]

Is protective controller such as discharge thermostat normal?

YES

Is charged amount of refrigerant normal?

YES

NO

NO

YES

Is overload relay normal?

NO

Is TD sensor resistance value

(50 k

Ω

at 25°C) normal?

YES

NO

Are wires connected to connector properly?

NO

Connect wires to connector properly.

Check and modify charged amount of refrigerant.

Unit operates normally.

Replace TD sensor.

Outdoor P.C.board is defective.

Replace P.C. board.

– 65 –

9-6. Troubleshooting for Indoor Unit

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

<Primary check>

(1) Is the supply voltage normal?

(2) Is the connection to the AC output OK?

(3) Are the connection of the primary side and the secondary side of the power transformer inserted into the P.C. board?

(4) Is the fuse (F01) blown?

Turn off power supply once, and

5 second later, turn it on again.

FILE NO. SVM-05015

Operation

Check item

Conceivable principle cause

Measure

Item by symptoms

Is OPERATION lamp blinking?

Is fuse (F01) of indoor control board blown?

YES

NO

Is voltage

(DC 12V or 5V) indicated on rear of indoor control board normal?

NO

YES

Is DC

310 - 340V supplied to primary side of transfer switch?

NO

YES

Are AC 14V,

and

AC 7V supplied to secondary side of transfer switch?

YES

NO

Refer to

<Primary check> or this problem is one step short of power P.C. board block.

Turn off breaker once and turn it on again after removing motor.

Parts (R21,

R22, SG01,

C15, C01,

DB01, C02, and T01) are defective.

Is it possible to turn on power supply by pressing

[ ] button on remote control?

NO

Does transmission mark on remote control flash normally, and is its signal transmitted properly?

YES

NO

YES

Check selector switch of remocon

A or B is correct same as remote controller

YES

NO

Remote control is defective.

Are AC 14V and AC 7V supplied to secondary side of transfer switch?

NO

YES

Does the fan motor connector between

1 and

3 short-circuit?

YES

Microcomputer is defective.

NO

SW transformer

(T01) or Tr (Q01) for power supply is defective.

Unit operates normally.

Refer to 9-9

Troubleshooting for

Remote Control.

Select switch to remocon A,B for correct same as remote controller

Replace main P.C. board.

Replace motor.

– 66 –

FILE NO. SVM-05015

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

Shut off the power supply once.

Turn the power supply.

Does the fan stop in no operating status?

YES

Start the operation with low fan setting in cool operation.

NO

Control P.C. board is defective.

Replace the P.C. board.

Does the fan rotate?

YES

Change the setting of cooling to high fan.

NO

Does the fan speed become higher?

YES

NO

Does AC 120V or higher voltage apply to between red and black lead of fan motor?

YES

Shut off the power supply.

NO

Does connecting terminal, connecting cable or power supply cord completely?

Does not found the short wire about connecting cable and power cord?

YES

NO

Does the cross flow fan rotate normally?

YES

Turn on the power supply.

NO

Repair the bearing of the fan.

Operation stops

Thermal fuse operated due to prevent temperature rising cause of incompleted connecting.

Motor control circuit failure

(IC30, IC03, RY501) or 12V power circuit failire

(D305, D306, Q301, T01).

Replace the P.C. board.

Is the rotation signal

(DC+5V-0V)output between

3

(Brown lead wire) and

2

(Gray lead wire) of the motor connector

(CN11) when rotating the cross flow fan by hand in no operating status? (3 pulses/one turn)

YES

NO

Replace the of fan motor

Normal

Replace the control

P.C. board.

Replace connecting the cable (or power cord), thermal fuse and terminal block.

– 67 –

9-6-3. Compressor does not operate.

<Primary check>

(1) Is the preset temperature higher than the room temperature in cooling operation?

(2) Is the crossover cable connected properly?

FILE NO. SVM-05015

<Inspection procedure>

-Cooling only model-

Turn on power supply.

Refer to 9-6-1

“Power can not be turned on”.

Does OPERATION lamp blink?

YES

NO

Does miniature relay RY04 switch on and off due to temperature changes?

YES

NO

Is it possible to detect AC

220 – 240V between

2 and

3

on terminal block?

YES

NO

Is resistance value of thermo sensor (TA) and heat exchanger sensor (TC) normal?

YES

NO

Microcomputer is defective.

Miniature relay RY04 is defective.

Thermo sensor or heat exchanger sensor is defective.

Replace thermo sensor or heat exchanger sensor.

Replace P.C. board.

Rewire or replace defective cords.

Are all of compressor cords normal?

NO

YES

Is compressor motor winding normal?

(Check winding resistor.)

YES

NO

Is capacitor for compressor normal?

NO

YES

NO


YES

NO

Does compressor start?

YES

Does compressor stop after a while?

YES

Is gas quantity normal?

(Check gas pressure.)

YES

Compressor is defective.

YES

Replace P.C. board.

NO


Capacitor is defective.

Overload relay is defective.


Gas shortage (Gas leak)

Replace compressor.

Replace capacitor.

Replace overload relay.

Replace compressor.

Supply gas.

– 68 –


- Colling model -

Turn on power supply.

Does OPERATION lamp blink?

YES

NO

Is it possible to start unit by remote control?

YES

NO

Is it possible to detect AC 200V between 2 and 3 on terminal block?

YES

NO

NO

Is crossover cable normal?

YES

NO


YES

NO



YES

NO


YES

NO


YES

NO


YES


YES



YES

NO


YES

Replace P.C. borad






FILE NO. SVM-05015

Supply gas.

Refer to item Power can not be turned on .

Refer to 9-9 Troubleshooting for Remote Control .

Replace P.C. Board and TC sensors.

Connect crossover cable properly.


Replace compressor.

Replace compressor.


Replace compressor.

−

69

−

<Inspection procedure)

- Heating model -

AC 70-100V

FILE NO. SVM-05015

Replace transformer outdoor

P.C. board.

− 70 −

YES


YES

NO



YES

NO

NO


YES

NO


YES

NO


YES


YES



YES

NO


YES

Replace compressor.






FILE NO. SVM-05015


Replace compressor.

Replace capacitor.


Replace compressor.

Supply gas.

– 71 –

FILE NO. SVM-05015

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

9-7-1. Outdoor unit does not operate.


(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.

Heatpump model

Terminal block on indoor side

Red

3

White

2

1

Terminal block

Tester

Normal condition : Voltage varied between AC70 ~ 100V

Abnormal condition : Voltage does not vary.

Cooling model

Terminal block on indoor side

Red

3

White

2

1

Terminal block

Tester

Fig. 9-7-1

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

2

and

3

of the

of the indoor's Terminal block should be equal AC 220 ~ 240V.

Abnormal condition : Don't found voltage AC 220 ~ 240V (For Asia model), AC 220V from terminal block (0V).

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

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

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

Gas has a low circulation.

Gas shortage

Gas leak

Pipe clogging

Measure gas pressure.

Compressor is turned off and on automatically by thermo sensor

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

(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.)

− 72 −

9-8. Troubleshooting for P.C. Board

9-8-1. How to check indoor P.C. board

<Cautions for handling P.C. board>

(1) When removing the front panel and the P.C. board, be sure to turn off the power supply.

(2) When removing the P.C. board, hold the edge of the P.C. board and do not apply force to the parts.

(3) When connecting or disconnecting the connectors on the P.C. board, hold the housing. Do not pull at lead wires.

FILE NO. SVM-05015


(1) If the P.C. board is detective, check for disconnection, burn or discoloration of the copper foil pattern of the P.C. board.

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

a. Main P.C. board parts:

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

b. Infrared rays parts:

Infrared rays receiving circuit

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

No.

1

2

Table 9-8-1 Inspection procedure

Procedure

Turn off the power supply and remove the P.C. board assembly from electric parts base. Remove the connecting cables from the terminal block.

Remove the connector of the motor and turn on the power supply. If

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

Check points Causes

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

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

Check power supply voltage;

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

2. Between + and – of C02

(DC310 – 340V)

3. Between 12V and GND

4. Between 5V and GND

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

2. The capacitor (C01 and C15), line filter (L01), resistor (R01), or the diode (DB01) is defective.

3. Q301, F02 and T01 are defective.

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

3 Press [ ] button once to start the unit. (Do not set the mode to Fan Only or On-Timer operation.)

4 Shorten the line of the restart delay timer and start unit.

5 Press [ ] button once to start the unit.

• Shorten the time of the restart delay timer.

• Set the operation mode to COOL.

• Set the fan speed level to AUTO.

• Set the preset temperature much lower than the room temperature.

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

Check power supply voltage;

<Heating and cooling model>

1. Between CN31 and CN23

(AC70 – 100V)

<Cooling only model>

1. Between collector of Q33 and

GND (for relay coil (DC12V))

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

Check whether or not all lamps

(OPERATION, TIMER,

PRE.-DEF. (or FAN ONLY), ECO and

AUTO) are indicated for 3 seconds

1. Check whether or not the compressor operates.

2. Check whether or not the

OPERATION lamp blinks.

<Heating and cooling model.>

IC05 and IC06 are defective.

<Cooling only model>

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

(Q33) is defective.

2. CN27 or RY04 is connected wrongly.

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

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

2. The connection of the heat exchanger sensor is loose.

(The connector is disconnected.)

(CN01)

3. The heat exchanger sensor and the P.C. board are defective.

(Refer to Table 9-8-2.)

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

– 73 –

No.

6

Procedure

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.

Check points

1. Check whether or not the compressor operates.

2. Check whether or not the

OPERATION lamp blinks.

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 condition.)

1. Check it is impossible to detect the voltage between

2

and

3

of the CN11.

2. The motor does not operate.

(But it is possible to receive the signal from the remote control.)

2. The motor rotates but vibrates strongly.

FILE NO. SVM-05015

Causes

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

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

(CN01)

3. The heat exchanger sensor and the P.C. board are defactive.

(Refer to Table 9-8-2.)

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

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.

Temperature

Resistance value

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

0°C

35.8

10°C

20.7

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

1

Press [CLR] button while pressing [CHK] button with a tip of a pencil.

2

Then press [ ] button to transmit the signal to the indoor unit.

20°C

12.6

25°C

10.0

30°C

7.92

(k

Ω

)

1

2

– 74 –

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

FILE NO. SVM-05015

Top View

Bottom View

– 75 –

FILE NO. SVM-05015

9-9. Troubleshooting for Remote Control

Press [ ] button.

Is transmission mark indicated?

YES

NO

The unit does not beep at all.

OPERATION lamp on indoor unit is not indicated.

Is receiver on indoor unit exposed to direct sunlight?

YES

NO

Press RESET button on remote control with tip of pencil.

Is there any thyristor fluorescent light nearby?

YES

NO NO

Does indoor unit operate when moving remote control near receiver or indoor unit?

Press [ ] button.

NO

Does indoor unit start to operate by automatic restart function?

YES

Does radio sound is affected by remote control when a signal is transmitted at distance of 5 cm from radio?

YES

NO

YES

Batteries are exhausted.

Is transmission mark indicated?

YES

NO

NO

Does indoor unit beep and operate?

YES

Remote control is defective.

P.C. board is defective.

Avoid direct sunlight.

Keep indoor unit away from thyristor fluorescent light.

Replace

P.C. board.

Replace batteries.

Normal operation

Note : After replacing batteries, press the RESET button with a tip of a pencil.

– 76 –

Replace remote control.

10. PARTS REPLACEMENT


No.

1

Part name

Air Inlet grille

Procedures

<How to remove the Air inlet grille>

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

2) Open the Air inlet grille with both hands.

FILE NO. SVM-05015

Remarks

Air inlet grille

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

4) Move the Air inlet grille toward.

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

Panel arm

Grille stopper

6) Remove the Panel arms from the Front panel.

<How to install the Air inlet grille>

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

2) Set the Air inlet grille arm to the axis of the

Front panel. (Refer to page 47, 8-4-3)

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

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

– 77 –

Air inlet grille

Panel arm

No.

2

Part name

Front panel

Procedures

<How to remove the Front panel>

1) Remove the Air inlet grille. (

1

)

2) In case of the Drain hose is installed through the Front panel.

: Remove the Drain band from the Front panel.

: Cut away the Opening base for piping from Front panel and keep parts.

FILE NO. SVM-05015

Remarks

Drain band

Drain panel

3) Open 3 Cap screws and remove the screws.

Cap screws

4) Remove 5 screws fixing the Front panel.

Front Panel

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

Screws

– 78 –

(Continue)

No.

2

Part name

Front panel

3

Drain pan assembly

Procedures

6) Remove both side hooks and remove the

Front panel by turn to air inlet part direction.

<How to install the Front panel>

1) In case of the Drain hose installation through the Front panel, install the opening base for piping in the Back body by a screw

(M4 x 12). Prepare it by yourself.

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

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

4) Fix 8 screws and close 3 Cap screws.

5) Install the Drain band into the Front panel.

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

<How to remove the Drain pan>

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

1

,

2

)

2) Remove the Louver motor from the Drain pan.

FILE NO. SVM-05015

Remarks

Hook

Guide-rib

3) Remove the shaft of Horizontal louver.

4) Remove the LED base and Electrical wire.

Louver motor

Electrical wire

LED base

5) Remove the TA sensor wire.

6) Remove the Drain hose.

Shaft of Horizontal lover

Drain hose

TA sensor

– 79 –

(Continue)

No.

3

Part name

Drain pan assembly

Procedures

7) Remove 7 screws and remove the Drain pan assembly.

FILE NO. SVM-05015

Remarks

Screw

Drain Pan

Screw

4

Electrical parts assembly

<How to remove the Electrical parts assembly>

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

1

,

2

,

3

)

2) Remove the Terminal cover.

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

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

5) Remove the TC sensor and earth wire from

Refrigeration assembly.

6) Remove the Electrical parts assembly.

Terminal cover

Connector cover

NOTE : When install the electrical parts

assembly, fix the screw after the Back body is fixed.


TC sensor

Cord clamp

Refrigeration assembly

Earth wire

– 80 –

(Continue)

Electrical parts assembly

Fan motor cords

No.

5

Part name

Refrigeration assembly

Procedures

<How to remove the Refrigeration assembly>

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

1

,

2

,

3

)

2) Stop the gas at the Outdoor unit.

3) Remove 2 pipes from the Refrigeration assembly.

4) Remove the TC sensor from holder.

5) Remove the pipe holder.

6) Remove the earth wire.

7) Remove 2 screws and remove the refrigeration assembly with pushing it to right hand.

FILE NO. SVM-05015

Remarks

Earth wire TC sensor

Pipe holder

6

Multiblade fan and Fan motor

<How to remove the Multiblade fan and

Fan motor>

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

1

,

2

)

2) Disconnect 2 connectors.

3) Remove the Fan covers.

4) Remove the Motor band with holding the

Fan motor and then remove the Fan motor with the Multi-blade fans.

2 Screws

Fan cover

5) Unfasten the Set-screw and remove the

Multi-blade fans.

Motor band

Motor

2 Connectors

Multi-blade fan

– 81 –

FILE NO. SVM-05015

10-2. Outdoor Unit (RAS-24UAH-E4, RAS-24UA-E4, RAS-24UAX4, RAS-24UA-AR4,

RAS-18UAX4-T2)

No.

1

Part name

Common procedure

Procedures

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)

Remarks

Top cabinet

Front cabinet

Electrical parts cover

Side cabinet

2

3

4

5

6

7

Running capacitor for compressor

Running capacitor for fan motor

Magnetic contactor

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

2) Remove the fixing screw. (1 screw

∅

4 x 10L)



1

2) Remove the fixing screw. (2 screws

∅

4 x 10L)

3) Disconnect the lead wires from the terminal.

Transformer

(Heat pump model)


1


∅

4 x 10L)

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

P.C. Board

(Heat pump model)


1

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

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

Spark killer

(Cooling only model)


1


∅

4 x 10L)


4 screws

∅

4 x 22L

Magnetic contactor

P.C. Board

Running capacitor for compressor

Transformer Running capacitor for fan motor

Heat pump model

Spark killer



Running capacitor for fan motor

Cooling only model

– 82 –

FILE NO. SVM-05015

10-3 Outdoor Unit (RAS-18UAH-E4)

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 Ø4 x 10L

2 Running capacitor for compressor

3 Running capacitor


1


∅ 4 x 10L)

3) Disconnect the lead wires from the capacitor

terminal.



1

2) Remove the fixing screw (2 screw

∅4 x 16L)


5 Transformer


1


∅ 4 x 10L)

3) Disconnect the lead wires from the capacitor

terminal.

6 P.C. Board


1


∅ 4 x 10L)

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


1

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

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

4 screws Ø4 x 22L 4 screws Ø4 x 10L



P.C. Board


Transformer

−

83

−

FILE NO. SVM-05015

10-4 Outdoor Unit (RAS-18UA-E4, RAS-18UAX4, RAS-18UA-AR4)

No. Part name Procedures Remarks

1 Common procedure

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

2) Remove the packed valved cover and the electrical

Parts cover

(3 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 upper cabinet. (4 scerws ∅ 4 x 10L)

(Pulling out upward)

5) Remove the front cabinet. (3 screws ∅ 4 x 10L)

(Pull the front right protion toward you, and remove it pulling out upward.)


3 - screws

∅

4 x 10L

2 Cord clamps

4 - screws

∅

4 x 22L

Packed valve cover

Upper cabinet

Front cabinet

2

3 f

Running capacitor or compressor

Running capacitor for fan motor


1


∅

4 x 10L)



1


∅

4 x 10L)


4

Magnetic contactor


1


∅

4 x 10L)


5 Spark killer

1) Perform the common procedure 1

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


−

84

−



Spark killer


FILE NO. SVM-05015

11. EXPLODED VIEWS AND PARTS LIST

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

Location

No.

Part

No.

Description

401 43T69311 PC Board

401 43T69312 PC Board

401 43T69313 PC Board

401 43T69314 PC Board

402 43T50004 Temperature sensor

403 43T60002 Terminal

404 43T62003 Cord clamp

Location

No.

Part

No.

Description

405 43T69315 Display unit

406 43T50302 Temperature sensor

407 43T69311 PC Board

407 43T69312 PC Board

407 43T69313 PC Board

407 43T69314 PC Board

408 43T08349 Switch cover

Note: Location No.401 and N0.407

43T69311 used for these models: RAS-24UFHP-E4, RAS-24UFHP-E4, RAS-24UFHP-ES4

43T69312 used for these models: RAS-24UFP-E4, RAS-24UFPX-E4, RAS-24UFP-AR4,

RAS-24UFP-ES4, RAS-24UFP-E4, RAS-18UFPX4-T2

43T69313 used for these models: RAS-18UFHP-E4, RAS-18UFHP-E4, RAS-18UFHP-ES4

43T69314 used for these models: RAS-18UFP-E4, RAS-18UFPX4, RAS-18UFP-AR4, RAS-18UFP-ES4,

RAS-18UFP-E4

– 85 –

FILE NO. SVM-05015


220

217

222

218

224

227

214

208

207

223

208

212 216

203

202

206

235

204

219

221

226

225

213

210

211

229

209

215 233

231

228

234

205

235

201

230

232

Location

No.

Part

No.

Description

Location

No.

Part

No.

Description

201

202

202

203

204

205

206

207

43T09312 AIR GRILLE

43T00357 PANEL ARM ASSY

(FOR Heat pump model)

43T00361 PANEL ARM ASSY

(FOR Cooling model)

43T00358 FRONT PANEL ASSY

43T01004

43T79303

43T80302

43T00359

MARK

DRAIN BAND

AIR FILTER

CAP SCREW C

221

222

223

224

225

226

43T49303

43T19304

43T19305

43T19306

43T19307

43T19308

43T82302

43T60314

43T62303

43T83003

PIPE HOLDER

COVER BODY L

COVER BODY R

COVER BODY LD

BUSH BODY-R

BUSH BODY-D

INSTALLATION PLATE

TERMINAL COVER

CONNECTOR COVER

HOLDER; REMOTE CONTROLLER

208

209

210

211

231

212

213

43T19309 SCREW SET (D-T)

43T21325 FAN MOTOR

232

232

43T85490 OWNER'S MANUAL

43T85491 OWNER'S MANUAL

214

215

43T72301

43T79304

DRAIN PAN ASSY

DRAIN HOSE ASSY 232 43T85492

(FOR RAS-18,24UKHP-E4, UKP-E4)

OWNER'S MANUAL

216 43T19303 STEPPING MOTOR (FOR RAS-18UFPX4-T2, RAS-18,24UFPX

217

218

43T09313 HORIZONAL LOUVER FLOCK

43T44318 REFRIGERATION ASSY

(FOR 24 Class, RAS-18UFPX4-T2)

233

233

43T49304 FLEXIBLE PIPE ASSY

(FOR 18 Class)

43T49305 FLEXIBLE PIPE ASSY

218

43T00360 CAP-SCREW LR

43T20303 FAN COVER

43T20304 MOTOR BAND ASSY

43T20305 FAN ASSY (MULTIBLADE FAN)

43T69421 WIRELESS-REMOCO (WH-H01EE)

(FOR Heat pump model)

43T69422 WIRELESS-REMOCO (WC-H01EE)

(FOR Cooling model)

219

220

43T44319 REFRIGERATION ASSY

(FOR 18 Class)

43T03303 BACK BODY ASSY

43T09314 VERTICAL LOUVER

227

228

229

230

231

234

235

(FOR 24 Class, RAS-18UFPX4-T2)

43T80003 FILTER; FRAME

43T00365 ASM-GRILLE-STOPPER

−

86

−


FILE NO. SVM-05015

Location

No.

Part

No.

Description

Location

No.

Part

No.

Description

13

14

15

16

17

18

19

01 43005144 CABINET; FRONT 23 43T49309 RUBBER-CUSHION (RUBBER GROMME

02 43T00005 CABINET;BACK 24 43T55322 MF CAPACITOR (45uF 440V)

03

04

43T00004

43T42306

CABINET;SIDE

BASE

25

26

43T55324

43T60324

CAPACITOR; PLASTIC-FILM

TERMINAL BLOCK;6P

08

09

10

11

05 43T00011 PLATE;PACKED;VALVE 27 43T41341 COMPRESSOR; 2JS350D5DA02

06 43T19314 GUARD-FAN 28 43T52302 MAGNETIC CONTACTOR; AC220-240V

07 43T19005 HANDLE 29 43T46319 4-WAY VALVE

43T62301

43020302

43T21333

43T47001

E-PARTS-COVER

FAN; PROPELLER; PP411

MOTOR FAN; AC220-240V 50Hz

NUT FLANGE

30

31

32

33

43T46330

43T69059

43T69060

43T79305

COIL; V-4WAY; AC220-240V 50Hz

SENSOR; TE

SENSOR; TD

DRAIN NIPPLE

43T96001 BUSHING

43043609 CONDENSER ASSEMBLY

43T46311 VALVE;PACKED 6.35 DIA

43T47331 BONNET, 6.35 DIA

43T46019 VALVE,PACKED 12.7 DIA

43T47333 BONNET, 12.70 DIA

43T47309 CAPILLARY TUBE; 0.8 DIA

34

35

36

37

38

46

47

43T58301 TRANSFORMER; TT-05

43T69336 PC Board

43T43316 SUB CONDENSOR


43T60325 FILTER;CLAMP

43T53001 STARTER; ELECTRIC

43045085 DRY-TANK

– 87 –

11-4. Outdoor Unit (RAS -18UA-E4, RAS-18UAX4)

FILE NO. SVM-05015

Location

No.

Part

No.

Description

Location

No.

Part

No.

Description

07

08

09

10

01

02

03

04

05

06

43T00368

43T03308

43T42317

43T09318

43T62311

43T20307

43T21345

43T47001

43T43359

43T46308

FRONT CABINET ASSEMBLY

BACK CABINET ASSEMBLY

BASE COAT ASSEMBLY

GUARD FAN

ELECTRIC PART COVER

FAN PROPELLER

FAN-MOTOR

NUT FLANGE

CONDENSER ASSEMBLY

VALVE;PACKED 6.35 DIA

14

15

16

17

18

19

20

21

22

23

43T63303

43T47013

43T41371

43T47324

43T49008

43T52310

43T00396

43T55322

43T55325

43T60352

FIXING PLATE VALVE

CAPILLARY TUBE; 2.0 DIA

COMPRESSOR;PH340X3C-4KT1

BOLT COMPRESSOR (M6)

CUSHION,RUBBER

PACKED VALVE COVER ASSEMBLY

UPPER CABINET ASSEMBLY

MF CAPACITOR (45uF 440V)

CAPACITOR; PLASTIC-FILM

TERMINAL BLOCK; 6P

11 43T46019 VALVE,PACKED 12.7 DIA 27 43T52302 MAGNETIC CONTACTOR; AC220-240V

12 43T47331 BONNET, 6.35 DIA 28 43T33002 SPARK-KILLER

13 43T47333 BONNET, 12.70 DIA

– 88 –

11-5. Outdoor Unit (RAS -18UA-AR4)

FILE NO. SVM-05015

Location

No.

Part

No.

Description

Location

No.

Part

No.

Description

0

1 43T00368 FRONT CABINET ASSEMBLY 14 43T63303 FIXING PLATE VALVE

0

2 43T03308 BACK CABINET ASSEMBLY 15 43T47013 CAPILLARY TUBE; 2.0 DIA

0

3 43T42317 BASE COAT ASSEMBLY 16 43T41372 COMPRESSOR;PH340X3C-4KTS1

0

4 43T09318 GUARD FAN 17 43T47324 BOLT COMPRESSOR (M6)

0

5 43T62311 ELECTRIC PART COVER 18 43T49008 CUSHION,RUBBER

0

6 43T20307 FAN PROPELLER 19 43T52310 PACKED VALVE COVER ASSEMBLY

0

7 43T21348 FAN-MOTOR 20 43T00396 UPPER CABINET ASSEMBLY

0

8 43T47001 NUT FLANGE 21 43T55326 MF CAPACITOR (50uF 440V)

0

9 43T43360 CONDENSER ASSEMBLY 22 43T55324 CAPACITOR; PLASTIC-FILM

10 43T46308 VALVE;PACKED 6.35 DIA 23 43T60352 TERMINAL BLOCK; 6P

11 43T46019 VALVE,PACKED 12.7 DIA 27 43T52302 MAGNETIC CONTACTOR; AC220-240V


13 43T47333 BONNET, 12.70 DIA

−

89

−

11-6. Outdoor Unit (RAS -18UAX4-T2)

FILE NO. SVM-05015

Location

No.

Part

No.

Description

Location

No.

Part

No.

Description

11

12

13

14

15

16

01

02

03

04

05

06

43T00024 PANEL; AIR OUTLET

43T00025 PANEL; FRONT

43T00026 PANEL;SIDE

43T42316 BASE ASSY

43T19320 GUARD; FIN

43T19319 GUARD; FAN

18

19

20

23

24

25

43T41369 COMPRESSOR (PH290X2C-4FT1)

43T62014 PROTECTOR; CORD


43T49008 CUSHION,RUBBER

43T21314 MOTOR FAN; AC220-240V 50Hz

43T20301 FAN;PROPELLER;PP491

07

08

43T91001

43T42005

PLATE;ROOF

PLATE; VALVE; PACKED

26

27

43T96001

43T96004

BUSHING

BUSHING; CORD

09 43T15001 HANDLE 28 43T62013 COVER; E-PARTS

10 43T43320 CONDENSER ASSEMBLY 29 43T52302 MAGNETIC CONTACTOR; AC220-240V

43T46014

43T46016

43T47334

43T47331

43T47013

VALVE;PACKED; 15.88

VALVE;PACKED 6.35

BONNET; 15.88 DIA.

BONNET, 6.35 DIA


43T60324 TERMINAL BLOCK;6P

30

31

32

40

43

43T55320 MF CAPACITOR (35uF 440V)

43T55321 MF CAPACITOR (3.5uF 450V)

43T96003 CLIP; CABLE

43T47317 NUT; FLANGE

43T33002 SPARK-KILLER

– 90 –


FILE NO. SVM-05015

Location

No.

Part

No.

Description

15

16

17

18

11

12

13

14

07

08

09

10

01

02

03

04

05

06

43T00024

43T00025

43T00026

43T42307

43T19320

43T19319

43T91001

43T42005

43T15001

43T43357

43T46014

43T46016

43T47334

43T47331

43T47013

43T60324

43T60325

43T41343

PANEL; AIR OUTLET

PANEL; FRONT

PANEL;SIDE

BASE ASSY

GUARD; FIN

GUARD; FAN

PLATE;ROOF


HANDLE

CONDENSER ASSEMBLY

VALVE;PACKED; 15.88

VALVE;PACKED 6.35

BONNET; 15.88 DIA.

BONNET, 6.35 DIA


TERMINAL BLOCK;6P

FILTER;CLAMP

COMPRESSOR; 2JS386D5BB02

19

20

43T62014

43T62015

PROTECTOR; CORD

PROTECTOR; CORD

23 43T49309 RUBBER-CUSHION (RUBBER GROMMET)

Location

No.

38

39

40

48

34

35

36

37

49

50

30

31

32

33

24

25

26

27

28

29

Part

No.

Description

43T21315 MOTOR; FAN; AC220-240V 50 HZ


43T96001 BUSHING

43T96004 BUSHING; CORD

43T62013 COVER; E-PARTS

43T52305 MAGNETIC CONTACTOR




43T46319 4-WAY VALVE

43T46330 COIL; V-4WAY; AC220-240V 50Hz

43T69059 SENSOR; TE

43T69060 SENSOR; TD

43T79305 DRAIN NIPPLE

43T58301 TRANSFORMER; TT-05

43T69336 PC Board


43045085 DRY-TANK


43T46005 CHECK-VALVE

– 91 –

11-8. Outdoor Unit (RAS-24UA-E4, RAS-24UAX4)

FILE NO. SVM-05015

Location

No.

07

08

09

10

01

02

03

04

05

06

11

12

13

14

16

18

Part

No.

Description



43T00026 PANEL;SIDE

43T42316 BASE ASSY

43T19320 GUARD; FIN

43T19319 GUARD; FAN

43T91001 PLATE;ROOF

43T42005 PLATE; VALVE; PACKED

43T15001 HANDLE

43T43349 CONDENSER ASSEMBLY

43T46014 VALVE;PACKED; 15.88

43T46016 VALVE;PACKED 6.35

43T47334 BONNET; 15.88 DIA.

43T47331 BONNET, 6.35 DIA

43T60324 TERMINAL BLOCK;6P

43T41370 COMPRESSOR;PH400X3CS-4KT1

Location

No.

27

28

29

30

19

20

23

24

25

26

31

32

40

43

44

Part

No.

Description



43T49316 RUBBER-CUSHION

43T21314 MOTOR FAN; AC220-240V 50Hz


43T96001 BUSHING

43T96004 BUSHING; CORD

43T62013 COVER; E-PARTS

43T52305 MAGNETIC CONTACTOR





43T33002 SPARK-KILLER


– 92 –

11-9. Outdoor Unit (RAS -24UA-AR4)

FILE NO. SVM-05015

Location

No.

Part

No.

Description

Location

No.

Part

No.

Description

07

08

09

10

01

02



19

20



03 43T00026 PANEL;SIDE 23 43T49316 RUBBER-CUSHION

04 43T42316 BASE ASSY 24 43T21316 MOTOR FAN; AC220-240V 50HZ

05 43T19320 GUARD; FIN 25 43T20301 FAN;PROPELLER;PP491

06 43T19019 GUARD; FAN 26 43T96001 BUSHING

43T91001

43T42005

43T15001

43T43349

PLATE;ROOF


HANDLE

CONDENSER ASSEMBLY

27

28

29

30

43T96004

43T62013

43T52305

43T55309

BUSHING; CORD

COVER; E-PARTS

MAGNETIC CONTACTOR

MF CAPACITOR (60uF 420V)

11 43T46014 VALVE;PACKED; 15.88 31 43T55321 MF CAPACITOR(3.5uF 450V)

12 43T46016 VALVE;PACKED 6.35

32 43T96003 CLIP; CABLE

13 43T47334 BONNET; 15.88 DIA. 40 43T47317 NUT; FLANGE


16 43T60324 TERMINAL BLOCK;6P 44 43T47025 CAPILLARY TUBE; 2.4 DIA

18 43T41374 COMPRESSOR; PH400X3CS-4KS1 45 43T47309 CAPILLARY TUBE; 0.8 DIA

– 93 –

FILE NO. SVM-03010(1)

TOSHIBA CARRIER (THAILAND) CO.,LTD.

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

AMPHUR MUANG, PATHUMTHANI 12000, THAILAND.

– 87 –

TOSHIBA RAS-18UFHP -E4, RAS-18UFP -E4, -AR4, RAS-18UFPX 4, 4-T2, RAS-24UFHP -E4, RAS-24UFP -E4, -AR4, RAS-24UFPX 4, RAS-18UAH -E4, RAS-18UA -E4, -AR4, RAS-18UAX 4, 4-T2, RAS-24UAH -E4, RAS-24UA -E4, -AR4, RAS-24UAX 4 air conditioner Service manual

Assistant Bot

SERVICE MANUAL

AIR-CONDITIONER

UNDER CEILING / CONSOLE TYPE

18 Class

(Heat pump model)

18 Class

(Cooling only model)

24 Class

CONTENTS

1. SPECIFICATIONS

2. CONSTRUCTION VIEWS

3. WIRING DIAGRAM

4. SPECIFICATION OF ELECTRICAL PARTS

5. REFRIGERATION CYCLE DIAGRAM

6. CONTROL BLOCK DIAGRAM

7. OPERATION DESCRIPTION

8. INSTALLATION PROCEDURE

9. TROUBLESHOOTING CHART

10. PARTS REPLACEMENT

11. EXPLODED VIEWS AND PARTS LIST

1. SPECIFICATIONS

Note : 1

Temperature

Condition

JIS B8615-1

Cooling Heating

2. CONSTRUCTION VIEWS

3. WIRING DIAGRAM

4. SPECIFICATION OF ELECTRICAL PARTS

No.

Parts name

Type

Specifications

4-6. Outdoor Unit (RAS-18UAX4-T2)

4-9. Outdoor Unit (RAS-24UA-AR4)

5. REFRIGERATION CYCLE DIAGRAM

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

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

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

T

P

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

T

P

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

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

* SASO Standard's condition

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

6. CONTROL BLOCK DIAGRAM

REMOTE CONTROL

REMOTE CONTROL

7. OPERATION DESCRIPTION

7-1-1. Louver control

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

7-2-2. Cooling operation

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

7-2-1. Fan only operation

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

Fig. 7-2-2

NOTE :

NOTE :

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

7-2-3. Dry operation

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

7-2-4. Heating operation *

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

Fig. 7-2-4

Fig. 7-2-6

Fig. 7-2-5

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

7-2-5. Automatic operation

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

NOTES :

Fig. 7-2-8 Cold draft preventing control

Table 7-2-1

Fig. 7-2-9

7-3. Hi PO WER Mode

([Hi PO WER] b contr utton on the remote ol is pressed.)