Toshiba RAS-24UAH-ES-1, RAS-24UKP-ES-1, RAS-18UA-ES2, RAS-18UKHP-ES2, RAS-18UAH-ES2 SERVICE MANUAL

FILE NO. SVM-03009

SERVICE MANUAL

AIR CONDITIONER

SPLIT WALL TYPE

RAS-24UKHP-ES-1 / RAS-24UAH-ES-1 RAS-18UKHP-ES2 / RAS-18UAH-ES2 RAS-24UKP-ES-1 / RAS-24UA-ES-1 RAS-18UKP-ES2 / RAS-18UA-ES2

	18 Class		18 Class	24 Class
(Heat pump model)			(Cooling only model)

Feb., 2003

FILE NO. SVM-03009

CONTENTS

1.SPECIFICATIONS

2.CONSTRUCTION VIEWS

2-1 Indoor Unit

2-2 Outdoor Unit (RAS-24UAH-ES-1, RAS24UA-ES-1) 2-3 Outdoor Unit (RAS-18UAH-ES2)

2-4 Outdoor Unit (RAS-18UA-ES2)

3.WIRING DIAGRAM

3-1 RAS-24UKHP-ES-1 / RAS-24UAH-ES-1 3-2 RAS-18UKHP-ES2 / RAS-18UAH-ES2 3-3 RAS-24UKP-ES-1 / RAS-24UA-ES-1 3-4 RAS-18UKP-ES2 / RAS-18UA-ES2

4.SPECIFICATION OF ELECTRICAL PARTS

4-1 Indoor Unit (RAS-24UKHP-ES-1, RAS-18UKHP-ES2) 4-2 Outdoor Unit (RAS-24UAH-ES-1)

4-3 Outdoor Unit (RAS-18UAH-ES2)

4-4 Indoor Unit (RAS-24UKP-ES-1, RAS-18UKP-ES2) 4-5 Outdoor Unit (RAS-24UA-ES-1)

4-6 Outdoor Unit (RAS-18UA-ES2)

5.REFRIGERATION CYCLE DIAGRAM

5-1 RAS-24UKHP-ES-1 / RAS-24UAH-ES-1 5-2 RAS-18UKHP-ES2 / RAS-18UAH-ES2 5-3 RAS-24UKP-ES-1 / RAS-24UA-ES-1 5-4 RAS-18UKP-ES2 / RAS-18UA-ES2

6.CONTROL BLOCK DIAGRAM

6-1 RAS-24UKHP-ES-1, RAS-18UKHP-ES2 6-2 RAS-24UKP-ES-1, RAS-18UKP-ES2

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 Others

– 1 –

FILE NO. SVM-03009

9.TROUBLESHOOTING CHART

9-1 Troubleshooting Procedure

9-2 Basic Check Items

9-3 Primary Judgement

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

9-6 Troubleshooting for Indoor Unit

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

9-9 Troubleshooting for Remote Control

10.PARTS REPLACEMENT

10-1 Indoor Unit

10-2 Outdoor Unit (RAS-24UAH-ES-1, RAS-24UA-ES-1) 10-3 Outdoor Unit (RAS-18UAH-ES2)

10-4 Outdoor Unit (RAS-18UA-ES2)

11.EXPLODED VIEWS AND PARTS LIST

11-1 Indoor Unit (E - Parts Assy)

11-2	Indoor Unit
11-3	Outdoor Unit (RAS-24UAH-ES-1)
11-4 Outdoor Unit (RAS-18UAH-ES2)
11-5	Outdoor Unit (RAS-24UA-ES-1)
11-6	Outdoor Unit (RAS-18UA-ES2)

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

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

– 2 –

FILE NO. SVM-03009

1. SPECIFICATIONS

	MODEL		RAS-24UKHP-ES-1				RAS-24UKP-ES-1		RAS-18UKHP-ES2				RAS-18UKP-ES2
			RAS-24UAH-ES-1				RAS-24UA-ES-1		RAS-18UAH-ES2				RAS-18UA-ES2
	ITEM		Cooling		Heating		Cooling		Cooling		Heating		Cooling
	Capacity		220V 240V 220V 240V				220V	240V	220V 240V 220V 240V				220V	240V
		kW	6.30	6.30	6.80	6.90	6.40	6.45	5.00	5.05	5.45	5.55	5.05	5.10
		Phase							1
	Power source	V						220 – 240
		Hz							50
	Power consumption	kW	2430 2510 2355 2435				2360	2440	1850 1900 1648 1718				1820	1870
	Power factor	%	96	92	95	90	96	92	98	97	94	92	98	97
			220V 240V 220V 240V				220V	240V	220V 240V 220V 240V				220V	240V
	Running current	A	0.3/	0.3/	0.3/11.2		0.3/10.9	0.3/10.8	0.2/	0.2/	0.2/	0.2/	0.2/8.2	0.2/7.8
	Indoor/Outdoor		11.2	11.1					8.4	8.0	7.9	7.7
	Starting current	A				54						47
	Moisture removal	lit/h		2.5				2.7		2.0				2.0
	Indoor (H/M/L)	dB				45/41/37						42/39/35
	Noise
	Outdoor (220-240V)	dB	56-57		57-58		56-57		51-52		52-53		51-52
	Name of refrigerant							R410A
	Refrigerant
	Rated amount	kg				1.6				1.3				1.2
	Refrigerant control							Capillary tube

Gas side size

mm

12.7

Connection type

Flare connection

Liquid side size

mm

6.35

Interconnection

Connection type

Flare connection

pipe

Maximum length

m

15*1

(One way)

25*2

20*2

Maximum height

m

10

8

difference

INDOOR UNIT

RAS-24UKHP-ES-1

RAS-24UKP-ES-1

RAS-18UKHP-ES2

RAS-18UKP-ES2

Height

mm

298

Dimensions

Width

mm

998

Depth

mm

208

Net weight

kg

12

Evaporator type

Finned tube

Indoor fan type

Cross flow fan

High fan

m3/h

950

950

950

750

800

750

Air volume

Medium fan

m3/h

750

800

750

650

700

650

Low fan

m3/h

600

650

600

530

570

530

Fan motor output

W

20

Air filter

Honeycomb woven filter with PP frame

OUTDOOR UNIT

RAS-24UAH-ES-1

RAS-24UA-ES-1

RAS-18UAH-ES2

RAS-18UA-ES2

Height

mm

690

538

Dimensions

Width

mm

880

830

780

Depth

mm

310

300

Net weight

kg

65

62

50

48

Condenser type

Finned tube

Outdoor fan type

Propeller fan

Airflow volume

m3/h

3400

3600

3400

3600

3400

3600

1800

2000

1800

2000

1800

2000

Fan motor output

W

65

42

Compressor

Model

PA290X3F-4MS

PA225X3F-4L

Output

W

2200

1500

Safety device

IOL, Td Sensor

IOL

IOL, Td Sensor

IOL

Louver type

Automatic louver

Usable outdoor temperature range

°C

15 ~ 43

–10 ~ 24

15 ~ 43

15 ~ 43

–10 ~ 24

15 ~ 43

– 3 –

FILE NO. SVM-03009

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	15°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-24UKHP-ES-1 / RAS-24UAH-ES-1	RAS-18UKHP-ES2 / RAS-18UAH-ES2
		RAS-24UKP-ES-1 / RAS-24UA-ES-1	RAS-18UKP-ES2 / RAS-18UA-ES2
*1	No need to charge	15m or less	15m or less
	extra refrigerant
*2	Need to charge	Over 15m up to 25m (20g/m)	Over 15m up to 20m (20g/m)
	extra refrigerant

– 4 –

FILE NO. SVM-03009

2. CONSTRUCTION VIEWS

2-1. Indoor Unit

Back body
Front panel	998	208
Grille inlet
298
75		75
7		8
51		50
Knock out system		Knock out system

50

75 56

55 or more	Minimum distance to ceiling
Outline of indoor unit
298

				160
	Connection pipe (0.39m)	Drain hose (0.54m)	57	18
	(Flare 12.7)	Connection pipe (0.49m)	Wireless remote control
		(Flare 6.35)

			998
			763.5			(For stud bolt 6)
			450
		20	20
		48	10			29
						41	48
						55 55
						55
	65		Installation			40
		100		100	65
			Plate outline

– 5 –

2-2. Outdoor Unit (RAS-24UAH-ES-1, RAS-24UA-ES-1)

dimensionInstallation	600	600 or	more	inletAir	12X18 8 10		bolt
					600or	outletAir	anchor 310
					- 4 for
						more
		100 or	more		100 or	more	23
				340

	6852
outlet	140
25 Drain
	600
120

A

8.63

340

Electric	Parts cover	Liquid side (Flare 6.35)	Gas side	(Flare 12.7)	Service Port	12
						340 (pitch)	364
						12
		Handle			88	74
						880
		690

DetailDrawing	600	50	12x18 hole
			27
A
			340

FILE NO. SVM-03009

Handle

– 6 –

				A	120
	A Detail Drawing
	600
	50	R10
	35
		23	325	52
		6 hole
	11x14 hole

	Handle
	420
7 –	538
–
	300

Fan guard

25 Drain outlet

90	600
	830

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

8- 6 holes

(for fixing outdoor unit)

6- 11x14 holes

or 8 — 10 anchor bolt)

		Electric
		Parts cover
		Liquid side
	Service Port	(Flare	6.35)
	54	Gas side
	91	(Flare	12.7)
90	50	344
	60

ES2)-18UAH-(RAS Unit Outdoor .3-2

03009-SVM .NO FILE

– 8 –

A Detail Drawing

	50	600
		R10
	35
325 301		23
		6 hole

11x14 hole

Handle

538

300

A

120

325

52.5

25Drain outlet	4- 11x14 hole	8- 6 hole
		(for fixing outdoor unit)
	(for 8- 10 anchor bolt)

Fan guard

420

27

100

130

90			600					90
			780									65.5

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

Electric parts cover

Liquid side (Flare 6.35)

Gas side (Flare 12.7)

Service

Port

344

ES2)-18UA-(RAS Unit Outdoor .4-2

03009-SVM .NO FILE

FILE NO. SVM-03009

3. WIRING DIAGRAM

3-1. RAS-24UKHP-ES-1 / RAS-24UAH-ES-1

BLK

WHI

RED

GRN&YEL

BLK

P04

CN31

CN30

CN23

COLOR IDENTIFICATION

BRW : BROWN RED : RED WHI : WHITE YEL : YELLOW BLU : BLUE BLK : BLACK GRY : GRAY PNK : PINK ORN : ORANGE

GRN&YEL : GREEN &YELLOW GRN : GREEN

R22

R09

SG01 VARISTOR

DSA

T6. 3A 250V

F01 FUSE

R21

LOUVER

FAN MOTOR

MOTOR

DC MOTOR

BLU PNK YEL

ORN

RED BRW

6 5 4

3

2 1

6 5 4 3

1

6 5 4

3 2 1

6 5 4

3

1

CN 07

CN 10

IC04

L01

R01

DB01

T01

C15

C01

DC15V

C02

DC0V

DC12V

DC7V

MAIN P.C. BOARD

DC0V

C06

(MCC-821)

IC02

IC

CN13

CN03

IC01

CN01

1 2 3 4

5 6 7 8 9 10

1 2

1 2

1 2 3 4

5

6 7 8 9 10

1 2

1 2

BLU BLU BLU

BLU

BLU BLU

BLU

BLU

BLU WHI

BLK BLK

THERMO

BLK

BLK

HEAT

1

2 3

4

5 6

7

8

9 10

SENSOR

1 2 3 4

5 6 7 8 9 10CN25

(TA)

EXCHANGER

INFRARED RAYS RECEIVE

SENSOR

(TC)

AND INDICATION PARTS

INDOOR

1

2

3

INDOOR

TERMINAL

UNIT

MAIN P.C. BOARD (MCC-890)

BLOCK

TRANSFORMER

OUTDOOR

BLK 1

1

DISCHARGE

POWER SUPPLY

UNIT

BLK

2

CN06

220-240 V~ 50 Hz

3 3

PIPE

SENSOR (TD)

RED

1

1

1

1

BLU

CN05

OUTDOOR

RED

3

3

CN07 2

TERMINAL

L

N

i

1

2

3

3 3

BLU

GRN&YEL

SG01

TNR

BLOCK

FERRITE CORE

BLK

R74

1 1

BLK

BLK

F01

RED

3 3

GRN&YEL

250VAC T6. 3A

TNR

1 1

BLK

WHI

5 5

R73

CN08 2

i

RED 7 7

CN01

3 3

BLK

CHASSIS

GRY 9 9

HEAT

BLK

RED

EXCHANGER

SENSOR (TE)

MAGNETIC

RY07

CONTACTOR

BLU 1 1

CN11

R

S

T

A1

YEL

3 3

(1/L1)

CR11

(3/L2)

(5/L3)

RY05

(2/T1)

(4/T2)

(6/T3)

52C

BLU 1 1

A2

U

V

W

CN02

3 3

BLU

CR12

COIL FOR

4 WAY VALVE

CR13

RY06

CAPACITOR

CAPACITOR

RED

RED

CN03

1

3

C

WHI

S

WHI

1

C

BLK

BLK

BLK

S

R

PNK

RED

COMPRESSOR TERMINAL

R

COMPRESSOR

FAN MOTOR

– 9 –

3-2. RAS-18UKHP-ES2 / RAS-18UAH-ES2

BLK

P04

BLK	CN30
WHI	CN31
RED

COLOR IDENTIFICATION

BRW : BROWN RED : RED WHI : WHITE YEL : YELLOW BLU : BLUE BLK : BLACK GRY : GRAY PNK : PINK ORN : ORANGE

GRN&YEL : GREEN &YELLOW GRN : GREEN

R22

R09

SG01 VARISTOR

DSA

T6.3A 250V

F01 FUSE

R21

GRN&YEL

CN23

FILE NO. SVM-03009

LOUVER											FAN MOTOR
MOTOR
											DC MOTOR
						BLU PNK YEL		ORN	RED BRW
							6 5 4 3		2 1		6 5 4 3		1
							6 5 4 3 2 1				6 5 4 3		1
							CN 07				CN 10
IC04
		L01			R01		DB01
											T01
C15					C01				+				DC15V
									C02				DC0V
													DC12V
													DC7V
MAIN P.C. BOARD													DC0V
											C06
		(MCC-821)
													IC02
											IC
			CN13						CN03		IC01
											CN01
1	2 3		4	5 6	7	8	9 10		1 2		1 2
1	2 3		4	5 6	7	8	9 10		1 2		1 2
BLU BLU BLU			BLU BLU BLU		BLU	BLU	BLU WHI		BLK BLK	THERMOBLK		BLK	HEAT
1	2	3	4	5 6	7	8	9 10	CN25		SENSOR
													EXCHANGER
1	2 3		4	5 6	7	8	9 10				(TA)
INFRARED RAYS RECEIVE													SENSOR
													(TC)
AND INDICATION PARTS

INDOOR

1

2

3

MAIN P.C. BOARD (MCC-890)

TERMINAL

INDOOR

TRANSFORMER

BLOCK

UNIT

BLK 1 1

DISCHARGE

POWER SUPPLY

BLK

3

2

CN06

OUTDOOR

3

PIPE

220-240 V~ 50 Hz

SENSOR (TD)

UNIT

RED

1 1

1

1

BLU

CN05

OUTDOOR

RED

3

3

CN07 2

TERMINAL

L

N

i

1

2

3

3 3

BLU

GRN&YEL

SG01

TNR

BLOCK

FERRITE CORE

BLK

R74

1 1

BLK

BLK

F01

RED

3 3

GRN&YEL

250VAC T6. 3A

TNR

1 1

BLK

WHI

5 5

CN01

R73

CN08 2

i

RED

7 7

3 3

BLK

HEAT

CHASSIS

GRY

BLK

RED

9 9

EXCHANGER

SENSOR (TE)

RY07

RELAY

BLU

1 1

CN11

11

13

15

A

YEL

3 3

CR11

RY05

B

BLU 1 1

12

14

16

3 3

CN02

BLU

CR12

COIL FOR

4WAY VALVE

CR13

RY06

CAPACITOR

CAPACITOR

RED

RED

C

S

R

CN03

1

3

COMPRESSOR TERMINAL

WHI

S

1

C

BLK

WHI

PNK

RED

BLK

BLK

R

COMPRESSOR

FAN MOTOR

– 10 –

FILE NO. SVM-03009

3-3. RAS-24UKP-ES-1 / RAS-24UA-ES-1

COLOR IDENTIFICATION

BRW : BROWN

RED : RED

WHI : WHITE

YEL : YELLOW

BLU : BLUE

BLK : BLACK

GRY : GRAY

PNK : PINK

ORN : ORANGE

GRN&YEL : GREEN & YELLOW

GRN : GREEN

BLK	R22	R09
P04	VARISTOR
SG01
DSA	T6.3A 250V

F01 FUSE

R21

BLK	CN30
WHI	CN31
RED	CN27 1 1

RY04

3

GRN&YEL

LOUVER										FAN MOTOR
MOTOR
										DC MOTOR
						BLU PNK YEL		ORN	RED BRW	6 5 4 3
							6 5 4	3	2 1		1
							6 5 4	3 2 1		6 5 4 3	1
							CN 07			CN 10
IC04
		L01			R01		DB01
										T01
C15					C01						DC15V
									C02		DC0V
											DC12V
											DC7V
MAIN P.C. BOARD											DC0V
										C06
		(MCC-821)
											IC02
										IC
			CN13						CN03	IC01
										CN01
1	2 3		4	5 6	7	8	9 10		1 2	1 2
1	2 3		4	5 6	7	8	9 10		1 2	1 2
BLU BLU BLU			BLU	BLU BLU	BLU	BLU	BLU WHI		BLK BLK	BLK	BLK
1	2	3	4	5 6	7	8	9 10
1	2 3		4	5 6	7	8	9 10 CN25			THERMO	HEAT
INFRARED RAYS RECEIVE										SENSOR	EXCHANGER
										(TA)	SENSOR
AND INDICATION PARTS
											(TC)

INDOOR	1	2	3
TERMINAL				INDOOR
BLOCK				UNIT

	POWER SUPPLY	OUTDOOR
	220-240 V~ 50 Hz
		UNIT

OUTDOOR	L			1	2	3
TERMINAL		N	i
BLOCK					GRN&YEL
	BLK
	BLK		RED			i
						CHASSIS
		RED
						ORN
			BLK	BLK		THERMOSTAT
			SPARK KILLER			ORN

A1 52C		A2	RED
RED					WHI	BLK
1/L1		RED		CAPACITOR	RED
	2/T1
		CAPACITOR	WHI	S	FAN MOTOR
			PNK	C	BLK
3/L2	4/T2
				R		C
				COMPRESSOR	S	R
5/L3	6/T3				COMPRESSOR TERMINAL

MAGNETIC CONTACTOR

– 11 –

FILE NO. SVM-03009

3-4. RAS-18UKP-ES2 / RAS-18UA-ES2

COLOR IDENTIFICATION

BRW : BROWN

RED : RED

WHI : WHITE

YEL : YELLOW

BLU : BLUE

BLK : BLACK

GRY : GRAY

PNK : PINK

ORN : ORANGE

GRN&YEL GREEN & YELLOW

GRN : GREEN

BLK	R22	R09
P04	VARISTOR
SG01
DSA	T6.3A	250V

F01 FUSE

R21

BLK	CN30
WHI	CN31
RED	CN27 1 1

RY04

3

GRN&YEL

LOUVER										FAN MOTOR
MOTOR
										DC MOTOR
					BLU PNK YEL		ORN	RED BRW
						6 5 4	3	2 1		6 5 4 3			1
						6 5 4	3 2 1			6 5 4 3			1
						CN 07				CN 10
IC04
	L01			R01		DB01
										T01
C15				C01				+					DC15V
								C02					DC0V
													DC12V
													DC7V
MAIN P.C. BOARD													DC0V
										C06
	(MCC-821)
													IC02
										IC
		CN13						CN03		IC01	CN01
1	2 3	4	5 6	7	8	9 10		1 2			1 2
1	2 3	4	5 6	7	8	9 10		1 2			1 2
BLU BLU BLU		BLU BLU BLU		BLU	BLU	BLU WHI		BLK BLK	THERMO		BLK	BLK	HEAT
1 2 3 4 5 6				7	8	9 10
1	2 3	4	5 6	7	8	9 10 CN25			SENSOR				EXCHANGER
INFRARED RAYS RECEIVE										(TA)			SENSOR
													(TC)
AND INDICATION PARTS

INDOOR	1	2	3	INDOOR
TERMINAL				UNIT
BLOCK
POWER SUPPLY				OUTDOOR
220-240 V~ 50 Hz
				UNIT

OUTDOOR
TERMINAL	L	N	i	1	2	3
BLOCK					BLK			GRN&YEL
		BLK
		RED			BLK
			GRN&YEL
	BLK	RED		RED			i
							CHASSIS
					SPARK KILLER			ORN
								THERMOSTAT
								ORN
		BLK
		11	13	15	A
	RELAY
		12	14	16	B
CAPACITOR						CAPACITOR
RED					RED
WHI	S					WHI		BLK
PNK	C					RED
		BLK
	R

FAN MOTOR

COMPRESSOR

C

S R

COMPRESSOR TERMINAL

– 12 –

FILE NO. SVM-03009

4. SPECIFICATION OF ELECTRICAL PARTS

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

No.	Parts name	Type		Specifications
1	Fan motor (for indoor)	ICF-340-30-F2	DC 340V, 30W
2	Thermo sensor (TA-sensor)	———	10k	Ω at 25°C
3	DC-DC transformer (T01)	SWT-58A	DC 390V, Secondary DC 15V, 12V, 7V
4	Microcontroller	TMP87CM40AN
5	Heat exchanger sensor	———	10k	Ω at 25°C
	(TC-sensor)
6	Line filter (L01)	SS11V-R07190	19mH, AC 0.7A
7	Diode (DB01)	D3SBA60	4A, 600V
8	Capacitor (C02)	KMH450VNSN120M25C 120µ F, 450V
9	Fuse (F01)	TSCR	T6.3A, 250V
10	Power supply IC (IC01)	MA8920	5A, 900V
11	Varistor (R21, R22)	15G561K	560V
12	Resistor (R01)	RF-5TK4R7	4.7Ω , 5W
13	Louver motor	MP35EA12	Output (Rated) 2W, 10poles, 1phase,
			DC 12V

4-2. Outdoor Unit (RAS-24UAH-ES-1)

No.	Parts name	Type		Specifications
			Output (Rated) 2200W, 2poles, 1 phase, 220 – 240V, 50Hz
1	Compressor	PA290X3F-4MS	Winding resistance (Ω	)		Red-Black	White-Black
			(at 20°C)			1.07	2.20
			Output (Rated) 65W, 6poles, 1 phase, 220 – 240V, 50Hz
2	Fan motor (for outdoor)	KFG6-71SB5P-T1	Winding resistance (Ω	)		Red-Black	White-Black
			(at 20°C)			64.4	127.4
3	Running capacitor	451355KQ	AC 450V, 3.5µ F
	(for fan motor)
4	Running capacitor	371456JCR	AC 370V, 45µ F
	(for compressor)
5	Solenoid coil	VHV (STF)	AC 220 – 240V
	(for 4-way valve)
6	Thermo sensor	TE / TD	10kΩ at 25°C / 50kΩ	at 25°C
7	Magnetic contactor	A35	220 – 240V, 50Hz
8	Transformer	TT-05	220 – 240V
9	Microcontroller	TMP47C840N
10	Varistor (R73, R74)	15G471K	470V
11	Fuse (F01)	MT3	T6.3A, 250V

– 13 –

FILE NO. SVM-03009

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

No.	Parts name	Type		Specifications
			Output (Rated) 1500W, 2poles, 1 phase, 220 – 240V, 50Hz
1	Compressor	PA225X3F-4L	Winding resistance (Ω	)		Red-Black	White-Black
			(at 20°C)			1.35	2.68
			Output (Rated) 65W, 6poles, 1 phase, 220 – 240V, 50Hz
2	Fan motor (for outdoor)	HF-240-42B-2	Winding resistance (Ω	)		Red-Black	White-Black
			(at 20°C)			176.2	290.5
3	Running capacitor	451205KQ	AC 450V, 2µ F
	(for fan motor)
4	Running capacitor	371456JCR	AC 370V, 45µ F
	(for compressor)
5	Solenoid coil	VHV (STF)	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	TT-05	220 – 240V
9	Microcomputer	TMP47C840N
10	Varistor (R73, R74)	15G471K	470V
11	Fuse (F01)	MT3	T6.3A, 250V

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

No.	Parts name	Type			Specifications
1	Fan motor (for indoor)	ICF-340-30-2		DC 340V, 30W
2	Thermo sensor (TA-sensor)	———	10k		Ω at 25°C
3	DC-DC transformer (T01)	SWT-58A		DC 390V, Secondary DC 15V, 12V, 7V
4	Microcontroller	TMP87CM40AN
5	Heat exchanger sensor	———	10k		Ω at 25°C
	(TC-sensor)
6	Line filter (L01)	SS11V-R07190		19mH, AC 0.7A
7	Diode (DB01)	D3SBA60		4A, 600V
8	Capacitor (C02)	KMH450VNSN120M25S 120µ F, 450V
9	Fuse (F01)	TSCR		T6.3A, 250V
10	Relay (for outdoor fan motor,	AJQ1341		Coil DC 12V, 33mA, Rated 1A, AC 250V
	solenoid coil) (RY04)
11	Power supply IC (IC01)	MA8920		5A, 900V
12	Varistor (R21, R22)	15G561K		560V
13	Resistor (R01)	RF-5TK4R7		4.7Ω , 5W
14	Louver motor	MP35EA12		Output (Rated) 2W,10poles, 1phase,
				DC 12V

– 14 –

FILE NO. SVM-03009

4-5. Outdoor Unit (RAS-24UA-ES-1)

No.	Parts name	Type		Specifications
			Output (Rated) 2200W, 2poles, 1 phase, 220 – 240V, 50Hz
1	Compressor	PA290X3F-4MS	Winding resistance (Ω	)	Red-Black	White-Black
			(at 20°C)		1.07	2.20
			Output (Rated) 65W, 6poles, 1 phase, 220 – 240V, 50Hz
2	Fan motor (for outdoor)	KFG6-71SB5P-T	Winding resistance (Ω	)	Red-Black	White-Black
			(at 20°C)		64.4	127.4
3	Running capacitor	451355KQ	AC 450V, 3.5µ F
	(for fan motor)
4	Running capacitor	371456JCR	AC 370V, 45µ F
	(for compressor)
5	Bimetal thermostat	CS-7C	Open 130 ± 5°C, Close 70 ± 10°C
6	Magnetic contactor	A35	220 – 240V, 50Hz

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

No.	Parts name	Type		Specifications
			Output (Rated) 1500W, 2poles, 1 phase, 220 – 240V, 50Hz
1	Compressor	PA225X3F-4L	Winding resistance (Ω	)	Red-Black	White-Black
			(at 20°C)		1.35	2.68
			Output (Rated) 42W, 6poles, 1 phase, 220 – 240V, 50Hz
2	Fan motor (for outdoor)	HF-240-42B	Winding resistance (Ω	)	Red-Black	White-Black
			(at 20°C)		176.2	290.5
3	Running capacitor	451205KQ	AC 450V, 2µ F
	(for fan motor)
4	Running capacitor	371456JCR	AC 370V, 45µ F
	(for compressor)
5	Bimetal thermostat	CS-7C	Open 130 ± 5°C, Close 70 ± 10°C
6	Relay	VC20FA	220 – 240V, 50Hz, 1P1a

– 15 –

FILE NO. SVM-03009

5. REFRIGERATION CYCLE DIAGRAM

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

	Cooling
0.49m	Heating
(Connecting pipe)
12.7

T1

Indoor unit

Heat exchanger

Cross flow fan

0.39m (Connecting pipe)6.35

O.D.:12.7mm	P	O.D.:6.35mm
	Packed valve	Packed valve
	( 12.7)	( 6.35)

Gas container connection (Reinstall etc.)

	Heating
Cooling	4-way valve
Heating	Cooling Compressor	PA290X3F-4MS
Tank			Capillary tube
			2.0x700s
		Condenser
			Refrigerant
		Propeller fan	R410A 1.6 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 T1 (°C)
					Indoor		Outdoor
	Standard	2.7	43.0	High	20/–		7/6
Heating	Overload*1	3.1 ~ 4.0	52.0 ~ 59.0	Low	27/–		24/18
	Low temperature	2.7	36.0	High	20/–		–10/–10
	Standard	0.9	11.0	High	27/19		35/24
Cooling	Overload	0.8	12.0	High	32/23		43/26
	Low temperature	0.5	1.0	Low	21/15		21/15

Note :

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

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

– 16 –

FILE NO. SVM-03009

5-2. RAS-18UKHP-ES2 / RAS-18UAH-ES2

	Cooling
0.39m	Heating
(Connecting pipe)
12.7

T1

Indoor unit

Evaporator

Cross flow fan

0.49m (Connecting pipe)6.35

O.D.:12.7mm	P			O.D.:6.35mm
	Packed valve			Packed valve
	( 12.7)			( 6.35)
	Heating
Cooling	4-way valve
Heating	Cooling Compressor	PA225X3F-4L
				Capillary tube
				1.0x1500s
	Accumulator		Capillary tube
				1.7x700s
		Condenser
				Refrigerant
		Propeller fan		R410A 1.3 kg
	Cooling	Outdoor unit	Mark(	)means check points of Gas Leak.
	Heating

		Standard	Surface temp. of heat		Ambient temp.
	50Hz			Fan speed	conditions DB/WB
		pressure P	exchanger interchanging	(indoor)		(°C)
		(MPaG)	pipe T1 (°C)
					Indoor		Outdoor
	Standard	2.7	45.0	High	20/–		7/6
Heating	Overload*1	3.0 ~ 3.8	49.0 ~ 58.0	Low	27/–		24/18
	Low temperature	2.0	34.0	High	20/–		–10/–10
	Standard	0.9	10.0	High	27/19		35/24
Cooling	Overload	1.0	15.0	High	32/23		43/26
	Low temperature	0.6	1.0	Low	21/15		21/15

Note :

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

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

– 17 –

FILE NO. SVM-03009

5-3. RAS-24UKP-ES-1 / RAS-24UA-ES-1

T1

Indoor unit

Heat exchanger

Cooling

0.49m (Connecting pipe)

12.7

Cross flow fan

0.39m (Connecting pipe)6.35

O.D.:12.7mm	P	O.D.:6.35mm
	Packed valve	Packed valve
	( 12.7)	( 6.35)

Gas container connection (Reinstall etc.)

Cooling
Cooling Compressor	PA290X3F-4MS
Tank		Capillary tube
		2.0x600s
	Condenser
		Refrigerant
	Propeller fan	R410A 1.6kg

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 T1 (°C)
					Indoor		Outdoor
	Standard	0.9	11.0	High	27/19		35/24
Cooling	Overload	0.8	12.0	High	32/23		43/26
	Low temperature	0.5	1.0	Low	21/15		21/15

Note :

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

– 18 –

FILE NO. SVM-03009

5-4. RAS-18UKP-ES2 / RAS-18UA-ES2

T1

	Indoor unit
	Evaporator
	Cooling
0.39m
(Connecting pipe)
	12.7
	Cross flow fan

0.49m (Connecting pipe)6.35

O.D.:12.7mm	P			O.D.:6.35mm
	Packed valve			Packed valve
	( 12.7)			( 6.35)
Cooling				Muffler
	Cooling Compressor	PA225X3F-4L
				Capillary tube
				1.7x350s
	Accumulator
		Condenser
				Refrigerant
		Propeller fan		R410A 1.2 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 T1 (°C)
					Indoor		Outdoor
	Standard	0.9	10.0	High	27/19		35/24
Cooling	Overload	1.0	13.0	High	32/23		43/26
	Low temperature	0.6	2.0	Low	21/15		21/15

Note :

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

– 19 –

FILE NO. SVM-03009

6. CONTROL BLOCK DIAGRAM

6-1. RAS-24UKHP-ES-1, RAS18UKHP-ES2

Indoor Unit Control Panel

M.C.U.

Functions

Operation

Heat Exchanger Sensor

•

Louver Control

Display

•

Timer

Temperature Sensor

3-minute Delay at Restart for Compressor

Display

•

Filter Sign

Infrared Rays Signal Receiver

Motor Revolution Control

Display

•

PRE DEF.

Initiallizing Circuit

Processing

Sign Display

Infrared

(Temperature Processing)

Rays

Clock Frequency

•

Timer

Hi Power

Oscillator Circuit

Sign Display

•

Indoor

Serial Signal Communication

Fan Motor

Power Supply

Remote

Circuit

Louver ON/OFF Signal

Control

Noise Filter

Louver Driver

Louver Motor

Serial Signal Transmitter/Receiver

From Outdoor Unit

220 ~ 240V AC 50Hz

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

– 20 –

FILE NO. SVM-03009

6-2. RAS-24UKP-ES-1, RAS18UKP-ES2

Indoor Unit Control Panel

M.C.U.

Functions

Operation

Heat Exchanger Sensor

•

Louver Control

Display

•

Timer

Temperature Sensor

3-minute Delay at Restart for Compressor

Display

•

Filter Sign

Infrared Rays Signal Receiver

Motor Revolution Control

Display

•

Fan Only

Initiallizing Circuit

Processing

Sign Display

Infrared

(Temperature Processing)

Rays

Clock Frequency

•

Timer

Hi Power

Oscillator Circuit

Sign Display

Indoor

Fan Motor

Power Supply

Remote

Circuit

Outdoor unit

Louver ON/OFF Signal

ON/OFF Signal

Control

Noise Filter

Louver Driver

Louver Motor

Relay Driver

Relay RY04

From Outdoor Unit

220 ~ 240V AC 50Hz

Outdoor Unit

REMOTE CONTROL

Infrared Rays

Remote Control

Operation (START/STOP)

Operation Mode Selection

AUTO, COOL, DRY, FAN ONLY

Temperature Setting

Fan Speed Selection

ON TIMER Setting

OFF TIMER Setting

Louver Auto Swing

Louver Direction Setting

ECO

Hi power

Filter Reset

– 21 –

Operations according to the commands from the indoor unit

FILE NO. SVM-03009

7. OPERATION DESCRIPTION

7-1. Outline of Air Conditioner Control

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

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

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

(1) Role of indoor unit controller

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

• Temperature measurement at the air inlet of the indoor heat exchanger by the indoor temperature sensor

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

• Louver motor control

• Indoor fan motor operation control

• LED display control

• 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) *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 (DC Fan motor)

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

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

Table 7-1-1

				RAS-24UKHP-ES-1 RAS-18UKHP-ES2
	MODEL
				Motor speed	Air flow level Motor speed		Air flow level
				(rpm)	(m3/h)	(rpm)	(m3/h)
	Cooling		HIGH	1350	950	1150	750
	and		MED	1150	750	1050	650
	Fan only		LOW	1000	600	900	530
			HIGH	1350	950	1200	800
	Heating		MED	1200	800	1100	700
			LOW	1050	650	950	570

MODEL			RAS-24UKP-ES-1		RAS-18UKP-ES2
Cooling		HIGH	1350	950	1150	750
and		MED	1150	750	1050	650
Fan only		LOW	1000	600	900	530

LOW+ = LOW+MED 2

MED+ = MED+HIGH 2

– 22 –