Toshiba RAS-24UFHP-ES, RAS-18UA-ES, RAS-24UFP-ES SERVICE MANUAL

FILE NO. SVM-02009

SERVICE MANUAL

AIR-CONDITIONER

UNDER CEILING / CONSOLE TYPE

RAS-18UFHP-ES / RAS-18UAH-ES

RAS-18UFP-ES / RAS-18UA-ES

RAS-24UFHP-ES / RAS-24UAH-ES

RAS-24UFP-ES / RAS-24UA-ES

18 Class

24 Class

Apr., 2002

FILE NO. SVM-02009

CONTENTS

1.SPECIFICATIONS

2.CONSTRUCTION VIEWS

2-1 Indoor Unit

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

3.WIRING DIAGRAM

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

4.SPECIFICATION OF ELECTRICAL PARTS

4-1 Indoor Unit

4-2 Outdoor Unit (RAS-18UAH-ES) 4-3 Outdoor Unit (RAS-18UA-ES) 4-4 Outdoor Unit (RAS-24UAH-ES) 4-5 Outdoor Unit (RAS-24UA-ES)

5.REFRIGERATION CYCLE DIAGRAM

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

6.CONTROL BLOCK DIAGRAM

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

7.OPERATION DESCRIPTION

7-1 Outline of Air Conditioner Control

7-2 Description of Operation Circuit

7-3 Hi POWER Mode

7-4 High-Temperature Limit Control

7-5 Low-Temperature Limit Control

7-6 Defrosting Operation

7-7 Auto Restart Function

7-8 Filter Check Lamp

8.INSTALLATION PROCEDURE

8-1 Safety Cautions

8-2 Installation Diagram of Indoor and Outdoor Units 8-3 Installation

8-4 Indoor Unit

8-5 Outdoor unit

8-6 How to Set Remote Control Selector Switch 8-7 How to Use Drain Pump Kit of Option

8-8 Others

– 1 –

FILE NO. SVM-02009

9.TROUBLESHOOTING CHART

9-1 Troubleshooting Procedure

9-2 Basic Check Items

9-3 Primary Judgement

9-4 Self-Diagnosis by Remote Control (Check Code) 9-5 How to Diagnose Faulty Parts

9-6 Troubleshooting for Indoor Unit

9-7 Troubleshooting for Wiring (Interconnect Cable and Serial Signal Wire) 9-8 Troubleshooting for P.C. Board

9-9 Troubleshooting for Remote Control

10.PARTS REPLACEMENT

10-1 Indoor Unit

10-2 Outdoor Unit (RAS-18UAH-ES, RAS-18UA-ES) 10-3 Outdoor Unit (RAS-24UAH-ES, RAS-24UA-ES)

11.EXPLODED VIEWS AND PARTS LIST

11-1 Indoor Unit (E-Parts Assy)

11-2	Indoor Unit
11-3 Outdoor Unit (RAS-18UAH-ES)
11-4	Outdoor Unit (RAS-18UA-ES)
11-5	Outdoor Unit (RAS-24UAH-ES)
11-6	Outdoor Unit (RAS-24UA-ES)

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

•This air conditioner requires special service tools

for the refrigerant R-410A.

– 2 –

FILE NO. SVM-02009

1. SPECIFICATIONS

MODEL			RAS-18UFHP-ES			RAS-18UFP-ES			RAS-24UFHP-ES			RAS-24UFP-ES
			RAS-18UAH-ES			RAS-18UA-ES			RAS-24UAH-ES			RAS-24UA-ES
ITEM		Cooling		Heating		Cooling		Cooling		Heating		Cooling
Capacity		220V	240V	220V	240V	220V	240V	220V	240V	220V	240V	220V	240V
	kW	5.00	5.10	5.70	5.75	5.15	5.25	6.20	6.30	7.00	7.10	6.40	6.45
	Phase						1
Power source	V						220 – 240
	Hz						50
Power consumption	W	1960	2010	1830	1880	1875	1925	2515	2570	2430	2530	2540	2615
Power factor	%	98	96	98	96	97	93	96	92	96	91	94	90
Indoor	A			0.4						0.45
Running current
Outdoor	A	8.60	8.30	7.70	7.60	8.30	8.15	11.35	11.20	11.10	11.15	11.85	11.70
Starting current	A			47						54
Moisture removal	lit/h			2.0					2.5			2.7
Indoor (H/M/L)	db			43/39/36						46/42/37
Noise
Outdoor	db	51	52	52	53	51	52	56	57	57	58	56	57
Name of refrigerant							R-410A
Refrigerant
Rated amount	kg			1.3			1.2			1.6
Refrigerant control							Capillary tube

Gas side size

mm

12.70

Connection type

Flare connection

Liquid side size

mm

6.35

Interconnection

Connection type

Flare connection

pipe

Maximum length

m

15*1

(One way)

20*2

25*2

Maximum height

m

8

10

difference

INDOOR UNIT

RAS-18UFHP-ES

RAS-18UFP-ES

RAS-24UFHP-ES

RAS-24UFP-ES

Width

mm

1093

Dimensions

Height

mm

633

Depth

mm

208

Net weight

kg

23

Evaporator type

Finned tube

Indoor fan type

Multi blade fan

High fan

m3/h

800

830

800

900

930

900

Air volume

Medium fan

m3/h

680

700

680

750

760

750

Low fan

m3/h

580

650

580

550

660

650

Fan motor output

W

50

Air filter

Washable -filter

OUTDOOR UNIT

RAS-18UAH-ES

RAS-18UA-ES

RAS-24UAH-ES

RAS-24UA-ES

Width

mm

830

880

Dimensions

Height

mm

538

690

Depth

mm

300

310

Net weight

kg

51

50

67

64

Condenser type

Finned tube

Outdoor fan type

Propeller fan

Airflow volume

m3/h

2105

2310

2150

2310

1830

2010

3380

3560

3380

3560

3380

3560

Fan motor output

W

42

65

Compressor

Model

PA225X3F-4L

PA290X3F-4MS

Output

W

1500

2200

Safety device

IOL, Td Sensor

IOL, Case Thermo

IOL, Td Sensor

IOL, Case Thermo

Louver type

Automatic louver

Usable outdoor temperature range°C

15 ~ 43

–10 ~ 24

15 ~ 43

15 ~ 43

-10 ~ 24

15 ~ 43

– 3 –

FILE NO. SVM-02009

Note : 1

• Capacity is based on the following temperature conditions.

Condition		JIS C9612-1994
Temperature	Cooling	Heating
(DB)	27°C	20°C
Indoor unit inlet air temperature
(WB)	19°C	12°C
(DB)	35°C	7°C
Outdoor unit inlet air temperature
(WB)	24°C	6°C

Note : 2

• Charge refrigerant according to the table below.

	Refrigerant	RAS-18UFHP-ES / RAS-18UAH-ES	RAS-24UFHP-ES / RAS-24UAH-ES
		RAS-18UFP-ES / RAS-18UA-ES	RAS-24UFP-ES / RAS-24UA-ES
*1	No need to charge	15m or less	15m or less
	refrigerant
*2	Need to charge	Over 15m up to 20m (20g/m)	Over 15m up to 25m (20g/m)
	refrigerant

– 4 –

FILE NO. SVM-02009

2. CONSTRUCTION VIEWS

2-1. Indoor Unit

Front panel

1093

UNDER CEILING & CONSOLE INSTALLATION

For stud bolt	200 Min	1093
( 8 - 10)		1015
For stud bolt (	6)	742
		450
	20	20

330
165		74

208

633

Knock out system

Grille air inlet

Back Body

Installation plate

Mount plate

		M10 Suspention bolt
	633
	460		160
	70 Min	57	18
		Wireless remote control

Knock out system

– 5 –

FILE NO. SVM-02009

2-2. Outdoor Unit (RAS-18UAH-ES, RAS-18UA-ES)

	600
	R10
325	6 hole
	11x14 hole
	A Detail Drawing

Handle

300

A	120

325

52

25 Drain oulet	8- 6 holes
	(For fixing outdoor unit)
	6- 11x14 holes
	(For 8 - 10 anchor bolt)

Fan guard

420

538

91 54

90	600	90	50
	830		160

100 or more	Air inlet	600 or more
325
100 or more	600	4x	11x14
	or more
Air		for	8- 10
inlet		anchor bolt

Installation dimension

Electric

Parts cover

	Service Port	Liquid side
		(Flare 6.35)

Gas side (Flare 12.70)

344

– 6 –

Mounting dimension of anchor bolt

FILE NO. SVM-02009

2-3. Outdoor Unit (RAS-24UAH-ES, RAS-24UA-ES)

A	120	25 Drain outlet

	600
	50
	27
340	12x18 hole

A Detail Drawing

340

64

68 52

600

140

4- 12x18 holes

(for 8 - 10 anchor bolt)

690

Handle

	88
880	74

Handle

23 310

Electric Parts cover

600

100 or more

600 or more

Liquid side (Flare 6.35)

100 or more

Air outlet

		Gas side
600	12x18	(Flare 12.70)
or more 4-
for	8 - 10

anchor bolt

Service Port

12	340 (pitch)	12
	364

– 7 –

FILE NO. SVM-02009

3. WIRING DIAGRAM

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

ORN

RED

INFRARED RAYS RECEIVE

AND INDICATION PARTS

LOUVER

PNK

YEL

1 2 3 4 5 6 7 8 9 10

MOTOR

CN25

BRW

1

2 3 4

5 6 7

8 9 10

BLU

BLU

BLU BLU BLU BLU BLU BLU

BLU BLU WHI

COLOR IDENTIFICATION

6 5 4 3 2 1

1 2 3 4 5 6 7 8 9 10

BRW

:

BROWN

CN13

CN07 6 5 4 3 2 1

1 2 3 4 5 6 7 8 9 10

RED

:

RED

SG01

R09

R507

WHI

:

WHITE

CN100 CN101

BLK

IC04

SWITCH

YEL

:

YELLOW

MAIN PCB

P04

1 1

WHI

1

PCB

BLU

:

BLUE

R22

MCC-865A

2 2 GRY 2

BLK

:

BLACK

F01

FUSE

3 3 GRY 3

GRY

:

GRAY

L01

R01

PNK

:

PINK

T6.3A 250VAC

DB01

MCC-865B

ORN

:

ORANGE

GRN&YEL

:

GREEN&

R21

C15

C01

SUPPLY

BLK

CN30

YELLOW

GRN

:

GREEN

C02

PUR

:

PURPLE

POWER CIRCUIT

WHI

CN31

RY401

RY501

CR502

RED

DC12V

DC5V

THERMO

SENSOR

CN03

(TA)

R405

1 1

BLK

CR501

IC03

2 2

BLK

CR401

C501

HEAT

CN23

EXCHANGER

SENSOR

GRN&YEL

CN01

(TC)

J401

1 1

BLK

2 2

BLK

R506

2 1 CN402

CN401 1

2 3

CN11

1 2 3

5

3

1

CN10

BLK

FOR FLOAT SWITCH

FOR DRAIN PUMP

1 2 3

5

3

1

WHI 1 1

WHI

(OPTION)

(OPTION)

When you use float

RED

RED

FAN

MOTOR

switch you should

3 3

PUR

cut J401

POWER SUPPLY		INDOOR	1 2 3	INDOOR
		TERMINAL
220-240V~, 50 Hz		BLOCK		UNIT
POWER		OUTDOOR		OUTDOOR
TERMINAL	L N	TERMINAL	1 2 3	UNIT
BLOCK		BLOCK
		FERRITE CORE
	BLK
	RED			GRN&YEL
	GRN&YEL			CHASSIS
BLK	RED

RELAY 11 13 15

			A
12	14	16	B

	CAPACITOR		CAPACITOR
RED			RED
WHI	S	BLK	WHI
PNK	C		RED	BLK

R

		BLK	6
		6
	BRW	3	3	BLU
	GRY
		2	2
	YEL			GRY
		1	1

TRANSFORMER			MAIN P.C. BOARD (MCC-1275)
BLK
	1 1		CN06		DISCHARGE
BLK		2
					PIPE
	3 3
					SENSOR (TD)
RED 1 1
			CN05		1 1	BLK
RED	3 3				CN07 2
			TNR		3 3	BLK
BLK	1 1		R74
BLK	3 3		F01
						BLK
WHI	5 5		T5A 250VAC	TNR	1 1
			CN01	R73	CN08 2
RED					3 3	BLK
	7 7
GRY 9 9					HEAT
					EXCHANGER
					SENSOR (TE)
	1	1
	3	3	CN04
				RY07
		5
BLU 1 1			CN11
YEL 3 3			CR11	RY05
BLK 1		1	CN02
BLK 3 3			CR12	TNR R96
COIL FOR
4 WAY VALVE
				IC07
			CN03
			1	3
			1

BLK

COMPRESSOR

FAN MOTOR

– 8 –

FILE NO. SVM-02009

3-2. RAS-18UFP-ES / RAS-18UA-ES

ORN

RED

INFRARED RAYS RECEIVE

AND INDICATION PARTS

LOUVER

PNK

YEL

1 2 3 4 5 6 7 8 9 10

MOTOR

CN25

BRW

1

2 3 4

5 6 7

8 9 10

BLU

BLU

BLU BLU BLU BLU BLU BLU

BLU BLU

WHI

COLOR IDENTIFICATION

6 5 4 3 2 1

1 2 3 4 5 6 7 8 9 10

BRW

:

BROWN

CN13

CN07 6 5 4 3 2 1

1 2 3 4 5 6 7 8 9 10

RED

:

RED

SG01

R09

R507

WHI

:

WHITE

BLK

CN100 CN101 SWITCH

YEL

:

YELLOW

IC04

MAIN PCB

P04

1 1

WHI

1

PCB

BLU

:

BLUE

R22

MCC-865A

BLK

:

BLACK

2 2 GRY 2

3 3 GRY 3

GRY

:

GRAY

F01

FUSE

L01

PNK

:

PINK

T6.3A 250VAC

R01

DB01

MCC-865B

ORN

:

ORANGE

GRN&YEL

:

GREEN&

R21

C15

C01

SUPPLY

BLK

CN30

YELLOW

GRN

:

GREEN

C02

PUR

:

PURPLE

POWER

CIRCUIT

WHI

CN31

CR02

RY401

RY501

CR502

RED

DC12V

CN27

RY04

DC5V

THERMO

SENSOR

1

1

CN03

(TA)

R405

3 3

1 1

BLK

CR501

IC03

2 2

BLK

CR401

C501

HEAT

EXCHANGER

SENSOR

GRN&YEL

CN01

(TC)

J401

1 1

BLK

2 2

BLK

R506

2 1 CN402

CN401 1

2 3

CN11

1

2 3

5

3

1

CN10

BLK

FOR FLOAT SWITCH

FOR DRAIN PUMP

1

2 3

5

3

1

WHI 1 1

WHI

(OPTION)

(OPTION)

When you use float

RED

RED

FAN

MOTOR

3 3

PUR

switch you should

cut J401

BLK

6 6

	BRW	3	3	BLU
	GRY
		2	2
	YEL			GRY
		1	1

	POWER SUPPLY		INDOOR		1 2 3	INDOOR
			TERMINAL
	220 - 240V~, 50Hz
			BLOCK			UNIT
	POWER		OUTDOOR			OUTDOOR
	TERMINAL L N		TERMINAL		1 2 3	UNIT
	BLOCK	BLK	BLOCK
						GRN&YEL
		RED
		GRN&YEL				CHASSIS
	RED				BLK
	BLK				BLK
					SPARK KILLER
				RED
	BLK					ORN
			RELAY
		11	13	15		THERMOSTAT
					A	ORN
		12	14		B
				16
	CAPACITOR				CAPACITOR
	RED				RED
	WHI	S			WHI
		C				BLK
	PNK	BLK			RED
		R
	COMPRESSOR				FAN MOTOR

– 9 –

FILE NO. SVM-02009

3-3. RAS-24UFHP-ES / RAS-24UAH-ES

ORN

RED

INFRARED RAYS RECEIVE

AND INDICATION PARTS

LOUVER

PNK

YEL

1 2 3 4 5 6 7 8 9 10

MOTOR

CN25

BRW

1

2 3 4

5 6 7

8 9 10

BLU

BLU

BLU BLU BLU BLU BLU BLU

BLU BLU WHI

COLOR IDENTIFICATION

6 5 4 3 2 1

1 2 3 4 5 6 7 8 9 10

BRW

:

BROWN

CN13

CN07 6 5 4 3 2 1

1 2 3 4 5 6 7 8 9 10

RED

:

RED

SG01

R09

R507

WHI

:

WHITE

CN100 CN101

BLK

IC04

SWITCH

YEL

:

YELLOW

MAIN PCB

P04

1 1

WHI

1

PCB

BLU

:

BLUE

R22

MCC-865A

2 2 GRY 2

BLK

:

BLACK

F01

FUSE

3 3 GRY 3

GRY

:

GRAY

L01

R01

PNK

:

PINK

T6.3A 250VAC

DB01

MCC-865B

ORN

:

ORANGE

GRN&YEL

:

GREEN&

R21

C15

C01

SUPPLY

BLK

CN30

YELLOW

GRN

:

GREEN

C02

PUR

:

PURPLE

POWER CIRCUIT

WHI

CN31

RY401

RY501

CR502

RED

DC12V

DC5V

THERMO

SENSOR

CN03

(TA)

R405

1 1

BLK

CR501

IC03

2 2

BLK

CR401

C501

HEAT

CN23

EXCHANGER

SENSOR

GRN&YEL

CN01

(TC)

J401

1 1

BLK

2 2

BLK

R506

2 1 CN402

CN401 1

2 3

CN11

1 2 3

5

3

1

CN10

BLK

FOR FLOAT SWITCH

FOR DRAIN PUMP

1 2 3

5

3

1

WHI 1 1

WHI

(OPTION)

(OPTION)

When you use float

RED

RED

FAN

MOTOR

switch you should

3 3

PUR

cut J401

POWER SUPPLY		INDOOR	1 2 3	INDOOR
		TERMINAL
220-240V~, 50 Hz		BLOCK		UNIT
POWER		OUTDOOR		OUTDOOR
TERMINAL	L N	TERMINAL	1 2 3	UNIT
BLOCK		BLOCK
	BLK	FERRITE CORE
	RED			GRN&YEL
	GRN&YEL			CHASSIS
BLK	RED

MAGNETIC RELAY	T	S	R

A1

52C

A2

W V U

	CAPACITOR		CAPACITOR
RED			RED
WHI	S	BLK	WHI
PNK	C		RED	BLK

R

		BLK	6
		6
	BRW	3	3	BLU
	GRY
		2	2
	YEL			GRY
		1	1

TRANSFORMER			MAIN P.C. BOARD (MCC-1275)
BLK
	1 1		CN06		DISCHARGE
BLK		2
					PIPE
	3 3
					SENSOR (TD)
RED 1 1
			CN05		1 1	BLK
RED	3 3				CN07 2
			TNR		3 3	BLK
BLK	1 1		R74
BLK	3 3		F01
						BLK
WHI	5 5		T5A 250VAC	TNR	1 1
			CN01	R73	CN08 2
RED					3 3	BLK
	7 7
GRY 9 9					HEAT
					EXCHANGER
					SENSOR (TE)
	1	1
	3	3	CN04
				RY07
		5
BLU 1 1			CN11
YEL 3 3			CR11	RY05
BLK 1		1	CN02
BLK 3 3			CR12	TNR R96
COIL FOR
4 WAY VALVE
				IC07
			CN03
			1	3
			1

BLK

COMPRESSOR

FAN MOTOR

– 10 –

FILE NO. SVM-02009

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

ORN

RED

INFRARED RAYS RECEIVE

AND INDICATION PARTS

LOUVER

PNK

YEL

1 2 3 4 5 6 7 8 9 10

MOTOR

CN25

BRW

1

2 3 4

5 6 7

8 9 10

BLU

BLU

BLU BLU BLU BLU BLU BLU

BLU BLU

WHI

COLOR IDENTIFICATION

6 5 4 3 2 1

1 2 3 4 5 6 7 8 9 10

BRW

:

BROWN

CN13

CN07 6 5 4 3 2 1

1 2 3 4 5 6 7 8 9 10

RED

:

RED

SG01

R09

R507

WHI

:

WHITE

BLK

CN100 CN101 SWITCH

YEL

:

YELLOW

IC04

MAIN PCB

P04

1 1

WHI

1

PCB

BLU

:

BLUE

R22

MCC-865A

BLK

:

BLACK

2 2 GRY 2

3 3 GRY 3

GRY

:

GRAY

F01

FUSE

L01

PNK

:

PINK

T6.3A 250VAC

R01

DB01

MCC-865B

ORN

:

ORANGE

GRN&YEL

:

GREEN&

R21

C15

C01

SUPPLY

BLK

CN30

YELLOW

GRN

:

GREEN

C02

PUR

:

PURPLE

POWER

CIRCUIT

WHI

CN31

CR02

RY401

RY501

CR502

RED

DC12V

CN27

RY04

DC5V

THERMO

SENSOR

1

1

CN03

(TA)

R405

3 3

1 1

BLK

CR501

IC03

2 2

BLK

CR401

C501

HEAT

EXCHANGER

SENSOR

GRN&YEL

CN01

(TC)

J401

1 1

BLK

2 2

BLK

R506

2 1 CN402

CN401 1

2 3

CN11

1 2 3

5

3

1

CN10

BLK

FOR FLOAT SWITCH

FOR DRAIN PUMP

1 2 3

5

3

1

WHI 1 1

WHI

(OPTION)

(OPTION)

When you use float

RED

RED

FAN

MOTOR

3 3

PUR

switch you should

cut J401

BLK

6 6

	BRW	3	3	BLU
	GRY
		2	2
	YEL			GRY
		1	1

POWER SUPPLY 220 - 240V~, 50Hz

220V ~, 50Hz (For RAS-18UAX-T2, RAS-24UAX-T)

POWER

TERMINAL L N

BLOCK

BLK

RED

GRN&YEL

INDOOR	INDOOR
TERMINAL 1 2 3
BLOCK	UNIT

OUTDOOR OUTDOOR TERMINAL 1 2 3 UNIT BLOCK

GRN&YEL

FERRITE CORE

CHASSIS

(For model RAS-24UA series)

BLK	BLK	ORN

SPARK KILLER				THERMOSTAT
				ORN
A1 52C A2				RED
BLK RED RED
					WHI
				CAPACITOR
R	U	RED			RED	BLK
		CAPACITOR	WHI	S	FAN MOTOR
S	V		PNK	C BLK
				R
T	W			COMPRESSOR

MAGNETIC RELAY

– 11 –

FILE NO. SVM-02009

4. SPECIFICATION OF ELECTRICAL PARTS

4-1. Indoor Unit

	No.	Parts name	Type			Specifications
	1	Fan motor (for indoor)	AFP-220-50-4A		Output (Rated) 50W, 220-240V
	2	Thermo sensor (TA-sensor)	———	10k		Ω at 25°C
	3	DC-DC transformer (T01)	SWT-47		DC 390V, Secondary DC 12V, 7V
	4	Microcomputer	TMP87CM40AN
	5	Heat exchanger sensor	———	10k		Ω at 25°C
		(TC-sensor)
	6	Line filter (L01)	SS11V-R07190		19mH, AC0.7A
	7	Diode (DB01)	D3SBA60		4A, 600V
	8	Capacitor (C02)	KMH400VSSN47M22S 47µF, 400V
	9	Fuse (F01)	TSCR		T6.3A, 250V
	10	Varistor (R21, R22)	15G561K		560V
	11	Resistor (R01)	RF-2TK5R6		5.6Ω , 2W
	12	Louver motor	MP35EA12		Output (Rated) 2W,10poles, 1phase,
					DC 12V

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

No.	Parts name	Type	Specifications
			Output (Rated) 1500W, 2poles, 1phase, 220 – 240V, 50Hz
1	Compressor	PA225X3F-4L	Winding resistance (Ω	)		Red-Black	White-Black
			(at 20°C)			1.35	2.68
			Output (Rated) 65W, 6poles, 1phase, 220 – 240V, 50Hz
2	Fan motor (for outdoor)	HF-240-42A1	Winding resistance (Ω	)		Red-Black	White-Black
			(at 20°C)			176.2	290.5
3	Running capacitor	SK45FMP02U2	AC 450V, 2µF
	(for fan motor)
4	Running capacitor	SK42CMP45U1	AC 420V, 45µF
	(for compressor)
5	Solenoid coil	VHV	AC 220 – 240V
	(for 4-way valve)
6	Thermo sensor	TE / TD	10kΩ at 25°C / 50kΩ	at 25°C
7	Relay	VC20FA	220 – 240V, 50Hz, 1P1a
8	Transformer	FT67	220 – 240V
9	Microcomputer	TMP47C840N
10	Varistor (R73, 74, 86)	15G471K	470V
11	Fuse (F01)	MT3	T5A, 250V

– 12 –

FILE NO. SVM-02009

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

No.	Parts name	Type	Specifications
			Output (Rated) 1500W, 2poles, 1phase, 220 – 240V, 50Hz
1	Compressor	PA225X3F-4L	Winding resistance (Ω )		Red-Black	White-Black
			(at 20°C)		1.35	2.68
			Output (Rated) 42W, 6poles, 1phase, 220 – 240V, 50Hz
2	Fan motor (for outdoor)	HF-240-42A	Winding resistance (Ω )		Red-Black	White-Black
			(at 20°C)		176.2	290.5
3	Running capacitor	SK45FMP02U2	AC 450V, 2µF
	(for fan motor)
4	Running capacitor	SK42CMP45U1	AC 420V, 45µF
	(for compressor)
5	Relay	VC20FA	220 – 240V, 50Hz, 1P1a

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

No.	Parts name	Type	Specifications
			Output (Rated) 2200W, 2poles, 1 phase, 220 – 240V, 50Hz
1	Compressor	PA290X3F-4MS	Winding resistance (Ω	)		Red-Black	White-Black
			(at 20°C)			1.07	2.20
			Output (Rated) 51W, 6poles, 1phase, 220 – 240V, 50Hz
2	Fan motor (for outdoor)	KPG6-71SB5P-T1	Winding resistance (Ω	)		Red-Black	White-Black
			(at 20°C)			64.4	127.4
3	Running capacitor	SK45FMP3.5U2	AC 450V, 3.5µF
	(for fan motor)
4	Running capacitor	SK42CMP45U1	AC 420V, 45µF
	(for compressor)
5	Solenoid coil	VHV	AC 220 – 240V
	(for 4-way valve)
6	Thermo sensor	TE / TD	10kΩ at 25°C / 50kΩ	at 25°C
7	Magnetic relay	CLK-35J	220 – 240V, 50Hz
8	Transformer	FT67	220 – 240V
9	Microcomputer	TMP47C840N
10	Varistor (R73, 74, 86)	15G471K	470V
11	Fuse (F01)	MT3	T5A, 250V

– 13 –

FILE NO. SVM-02009

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

No.	Parts name	Type	Specifications
			Output (Rated) 2200W, 2poles, 1phase, 220 – 240V, 50Hz
1	Compressor	PA290X3F-4MS	Winding resistance (Ω	)	Red-Black	White-Black
			(at 20°C)		1.07	2.20
			Output (Rated) 51W, 6poles, 1phase, 220 – 240V, 50Hz
2	Fan motor (for outdoor)	KPG6-71SB5P-T1	Winding resistance (Ω	)	Red-Black	White-Black
			(at 20°C)		64.4	127.4
3	Running capacitor	SK45FMP3.5U2	AC 450V, 3.5µF
	(for fan motor)
4	Running capacitor	SK42CMP45U1	AC 420V, 45µF
	(for compressor)
5	Magnetic relay	CLK-35J	220 – 240V, 50Hz

– 14 –

FILE NO. SVM-02009

5. REFRIGERATION CYCLE DIAGRAM

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

			Indoor unit	T
		Cooling	Evaporator
0.39m		Heating		0.49m
(Connecting pipe)
				(Connecting pipe)
	12.70 mm
			Multi blade fan	6.35 mm
0.39m
(Flexible pipe)
	12.70 mm	P		O.D.:6.35 mm
	O.D.:12.70 mm

	Packed valve			Packed valve
	( 12.70)			( 6.35)
	Heating
Cooling	4-way valve
	Muffler
Heating	Cooling Compressor	PA225X3F-4L
				Capillary tube
				1.0x1500S
			Capillary tube
	Accumulator			1.7x700S
		Condenser
				Refrigerant
		Propeller fan		R-410A 1.30 Kg

Cooling	Outdoor unit	Mark (		) means check points of Gas Leak
Heating

		Standard	Surface temp. of heat		Ambient temp.
				Fan speed	conditions DB/WB
	50Hz	pressure P	exchanger interchanging
				(indoor)	(°C)
		(MPaG)	pipe T (°C)
					Indoor	Outdoor
	Standard	2.7	45.0	High	20/–	7/6
Heating	High temperature*1	3.0 ~ 3.8	49.0 ~ 58.0	Low	27/–	24/18
	Low temperature	2.0	34.0	High	20/–	–10/–10
	Standard	0.9	10.0	High	27/19	35/24
Cooling	High temperature	1.0	15.0	High	32/23	43/26
	Low temperature	0.6	1.0	Low	21/15	21/15

Note : Measure the heat exchanger temperature at the center of U-bend. (By means of TC sensor.) *1 : During heating overload, the high temperature limit control operation is included.

– 15 –

FILE NO. SVM-02009

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

0.39m

(Connecting pipe)

12.70 mm

0.39m

(Flexible pipe)

12.70 mm

P

O.D.:12.70 mm

Packed valve

(

12.70)

T

Indoor unit

Evaporator

0.49m (Connecting pipe)6.35 mm

Multi blade fan

O.D.:6.35 mm

Packed valve ( 6.35)

Accumulator
		Muffler
Compressor PA225X3F-4L		Capillary tube
		1.7x350S
	Condenser
		Refrigerant
	Propeller fan	R-410A 1.20 Kg

Outdoor unit Mark () means check points of Gas Leak

		Standard	Surface temp. of heat		Ambient temp.
				Fan speed	conditions DB/WB
	50Hz	pressure P	exchanger interchanging
				(indoor)	(°C)
		(MPaG)	pipe T (°C)
					Indoor	Outdoor
	Standard	0.9	10.0	High	27/19	35/24
Cooling	High temperature	1.0	13.0	High	32/23	43/26
	Low temperature	0.6	2.0	Low	21/15	21/15

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

– 16 –

FILE NO. SVM-02009

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

	Cooling
0.39m	Heating
(Connecting pipe)
12.70 mm
0.39m
(Flexible pipe)
12.70 mm	P
O.D.:12.70 mm
	Packed valve
	( 12.70)

T

Indoor unit

Evaporator

Multi blade fan

Packed valve

( 6.35)

0.49m (Connecting pipe)6.35 mm

O.D.:6.35 mm

	Heating
Cooling	4-way valve
	Muffler
Heating	Cooling Compressor	PA290X3F-4MS
Tank
				Capillary tube
		Condenser		2.0x700S
				Refrigerant
		Propeller fan		R-410A 1.60 Kg
	Cooling	Outdoor unit	Mark (	) means check points of Gas Leak
	Heating

		Standard	Surface temp. of heat			Ambient temp.
				Fan speed		conditions DB/WB
	50Hz	pressure P	exchanger interchanging
				(indoor)			(°C)
		(MPaG)	pipe T (°C)
						Indoor		Outdoor
	Standard	2.7	43.0	High		20/–		7/6
Heating	High temperature*1	3.1 ~ 4.0	52.0 ~ 59.0	Low		27/–		24/18
	Low temperature	2.7	36.0	High		20/–		–10/–10
	Standard	0.9	11.0	High		27/19		35/24
Cooling	High temperature	0.8	12.0	High		32/23		43/26
	Low temperature	0.5	1.0	Low		21/15		21/15

Note : Measure the heat exchanger temperature at the center of U-bend. (By means of TC sensor.) *1 : During heating overload, the high temperature limit control operation is included.

– 17 –

FILE NO. SVM-02009

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

	Cooling
0.39m
(Connecting pipe)
12.70 mm
0.39m
(Flexible pipe)	P
12.70 mm

O.D.:12.70 mm

Packed valve

( 12.70 )

T

Indoor unit

Evaporator

Multi blade fan

Packed valve ( 6.35)

0.49m (Connecting pipe)6.35 mm

O.D.:6.35 mm

Tank
		Capillary tube
			2.0x600S
Compressor	PA290X3F-4MS
	Condenser
		Refrigerant
	Propeller fan	R-410A	1.60 Kg

Cooling	Outdoor unit	Mark (		) means check points of Gas Leak

		Standard	Surface temp. of heat		Ambient temp.
				Fan speed	conditions DB/WB
	50Hz	pressure P	exchanger interchanging
				(indoor)	(°C)
		(MPaG)	pipe T (°C)
					Indoor	Outdoor
	Standard	0.9	11.0	High	27/19	35/24
Cooling	High temperature	0.8	12.0	High	32/23	43/26
	Low temperature	0.5	1.0	Low	21/15	21/15

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

– 18 –

FILE NO. SVM-02009

6. CONTROL BLOCK DIAGRAM

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

Indoor Unit Control Panel

M.C.U.

8 MHz

Functions

Hi POWER

Heat Exchanger Sensor

Display

•

Louver Control

•

FILTER Sign

Temperature Sensor

3-minute Delay at Restart for Compressor

Display

•

Motor Revolution Control

PRE DEF.

Infrared Rays Signal Receiver

•

Processing

Sign Display

(Temperature Processing)

TIMER

Initiallizing Circuit

Display

Infrared

•

Timer

Rays

Clock Frequence

OPERATION

36.7 kHz

Oscillator Circuit

•

Drain Pump ON/OFF

Display

•

Serial Signal Communication

Indoor Fan

Motor

Power Supply

Louver ON/OFF Signal

Remote

Circuit

Control

Louver Motor

Louver Driver

Noise Filter

Serial Signal

Transmitter/

Relay

Float

Receiver

RY401

Switch

Drain

From Outdoor Unit

Pump

Serial Signal Communication

REMOTE CONTROL

Infrared Rays

Remote Control

Operation (START/STOP)

Operation Mode Selection

AUTO, COOL, DRY, HEAT, FAN ONLY

Temperature Setting

Fan Speed Selection

ON TIMER Setting

OFF TIMER Setting

Louver Auto Swing

Louver Direction Setting

ECO

Hi power

Filter Reset

– 19 –

FILE NO. SVM-02009

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

Indoor Unit Control Panel

M.C.U.

8 MHz

Functions

Hi POWER

Heat Exchanger Sensor

Display

•

Louver Control

•

FILTER Sign

Temperature Sensor

3-minute Delay at Restart for Compressor

Display

•

Motor Revolution Control

FAN-ONLY

Infrared Rays Signal Receiver

•

Sign Display

Processing

(Temperature Processing)

TIMER

Initiallizing Circuit

Infrared

Display

•

Timer

Rays

Clock Frequency

OPERATION

36.7 kHz

Oscillator Circuit

•

Drain Pump ON/OFF

Display

•

Compressor ON/OFF

Indoor Fan

Motor

Power Supply

Circuit

Driver

Louver ON/OFF Signal

Remote

Louver Motor

Control

Louver Driver

Noise Filter

Relay

Relay

Float

RY401

Switch

RY04

Drain

From Outdoor Unit

Pump

Compressor

REMOTE CONTROL

Infrared Rays

Remote Control

Operation (START/STOP)

Operation Mode Selection

AUTO, COOL, DRY, FAN ONLY

Temperature Setting

Fan Speed Selection

ON TIMER Setting

OFF TIMER Setting

Louver Auto Swing

Louver Direction Setting

ECO

Hi power

Filter Reset

– 20 –

Operations according to the commands from the indoor unit

FILE NO. SVM-02009

7. OPERATION DESCRIPTION

7-1. Outline of Air Conditioner Control

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

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

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

(1) Role of indoor unit controller

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

• Temperature measurement at air inlet of the indoor unit by the indoor temperature sensor.

• Temperature setting of the indoor heat exchanger by the heat exchanger sensor.

• Louver motor control.

• Indoor fan motor operation control.

• LED display control.

• Transferring of operation commands to the outdoor unit.

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

(2) Role of outdoor unit controller

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

• Compressor operation control

• Operation control of outdoor fan motor

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

•Defrost control in heating operation (Temperature measurement by the outdoor heat exchanger and control for the four-way valve and the outdoor fan motor.) Heating and Cooling Model only.

7-1-1. Louver control

(1)Vertical air flow louver

Position of veritcal air flow louver is automatically controlled according to the operation mode. Besides, position of vertical air flow louver can be arbitrarily set by pressing [FIX] button.

The louver position which is set by [FIX] button is stored in the microcomputer, and the louver is automatically set at the stored position for the next operation.

(2)Swing

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

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

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

(2)For air flow level, speed of the indoor fan motor is controlled in five steps (LOW, LOW+, MED, MED+ and HIGH). If AUTO mode is selected, the fan motor speed is automatically controlled by the difference between the preset temperature and the room temperature.

Table 7-1-1

			RAS-18UFHP-ES		RAS-24UFHP-ES
	MODEL
			Motor speed	Air flow level Motor speed		Air flow level
			(rpm)	(m3/h)	(rpm)	(m3/h)
	Cooling	HIGH	1060	800	1170	900
	and	MED	900	680	1000	750
	Fan only	LOW	800	580	850	650
		HIGH	1120	830	1210	930
	Heating	MED	950	700	1020	760
		LOW	850	650	860	660

MODEL		RAS-18UFP-ES		RAS-24UFP-ES
Cooling	HIGH	1060	800	1170	900
and	MED	900	680	1000	750
Fan only	LOW	800	580	850	650

LOW+ = LOW+MED 2

MED+ = MED+HIGH 2

– 21 –

7-2. Description of Operation Circuit

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

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

(3)Once the operation mode is set, it is memorized in the microcontroller so that the previous operation can be effected thereafter simply by pressing [START / STOP] button.

7-2-1. Fan only operation

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

(1)When [FAN] button is set to AUTO, the indoor fan motor operates as shown in Fig. 7-2-1. When [FAN] button is set to LOW, LOW+, MED, MED+ or HIGH, the motor operates with a constant air flow.

FILE NO. SVM-02009

7-2-2. Cooling operation

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

(1)The compressor, 4-way valve, outdoor fan and operation display on the remote control are controlled as shown in Fig. 7-2-2.

temp.)
(Preset	0.5				ON
		ON
temp.) —		OFF	ON	OFF OFF ON
(Room
Preset		0	Common relay
temp.		Compressor		4-way valve	Outdoor fan	OPERATION display

temp.)	+3
(Preset—			M+
	+2
	+2.5
			*1
temp.)	*1
	*1
(Room	+1.5
	+0.5
	+1		L—

Preset 0 temp.

NOTE :

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

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

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

Fig. 7-2-2

(2)When [FAN] button is set to AUTO, the indoor fan motor operates as shown in Fig. 7-2-3. When [FAN] button is set to LOW, LOW+, MED, MED+ or HIGH, the motor operates with a constant air flow.

	temp.)	+3
	(Preset		M+
		+2.5
		*1
	—	+2
		*1
	temp.)
		+1.5
		*1
	(Room	+1
			L—
		+0.5
	Preset		0
	temp.	-0.5

NOTE :

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

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

– 22 –

7-2-3. Dry operation

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

(1)The compressor, 4-way valve, outdoor fan and operation display on the remote control are controlled as shown in Fig. 7-2-4.

FILE NO. SVM-02009

7-2-4. Heating operation *Heating and cooling model only

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

(1)The compressor, 4-way valve, outdoor fan and operation display on the remote control are controlled as shown in Fig. 7-2-6.

(Preset—temp.)temp.)	+3		ON:5min.ON:6min. OFF:5min.OFF:4min.			ON:5min.ON:6min. OFF:5min.OFF:4min.
(Room	+2			ON	OFF		ON
	+1
			OFF			OFF
Preset		0
			Compressor	relayCommon	valveway-4	fanOutdoor	OPERATION display
temp.

Fig. 7-2-4

(2)The microcontroller turns the compressor on and off at the regular intervals (4 to 6 minutes). While the compressor is turning off, the indoor fan motor operates in the SUPER LOW position.

The pattern of operation depending on the relation between room temperature and preset temperatures is shown in Fig. 7-2-5.

Room temp.

Preset temp.+1

Preset temp.

Compressor	ON		ON		ON		ON
Outdoor fan		OFF		OFF		OFF
Indoor fan
	L.	*S.L.	L.	S.L.	L.	S.L.	L.
	*Super Low

Fig. 7-2-5

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

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

Preset		0
temp.
temp.)				OFF ON		ON	OFF	ON
— (Preset
	-0.5			Compressor	relayCommon	valveway-4		OPERATION display
							fanOutdoor
(Roomtemp.)
				ON			ON

Fig. 7-2-6

(2)When [FAN] button is set to AUTO, the indoor fan motor operates as shown in Fig. 7-2-7. When [FAN] button is set to LOW, LOW+, MED, MED+ or HIGH, the motor operates with a constant air flow.

	Preset		0	L
	temp.	-0.5		*2
	temp.)	-1.5
		-1		*1
	(Preset	-2
				M+
	temp.) —
		-5.0
	(Room	-5.5		H
		[FAN AUTO]

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

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

– 23 –