Toshiba RAS-4M36SAH-E, RAS-3M31SAH-E-1, RAS-10SKH-E-1 SERVICE MANUAL

FILE NO. A00-9805

SUPPLEMENT

SERVICE MANUAL

AIR-CONDITIONER

MULTI SPLIT WALL TYPE

RAS-10SKH-E-1 x 2 / RAS-M18SAH-E RAS-10SKH-E-1x2,RAS-13SKH-E/RAS-3M31SAH-E-1 RAS-10SKH-E-1 x 4 / RAS-4M36SAH-E

x 2

x 3

x 4

PRINTED IN JAPAN, Apr.,1998 ToMo

		CONTENTS
1.	DESCRIPTION .................................................................................................................		3
2.	SPECIFICATIONS ............................................................................................................		4
3.	CONSTRUCTION VIEWS ..............................................................................................		11
	3-1.	Indoor Unit ................................................................................................................................	11
	3-2.	Outdoor Unit .............................................................................................................................	12
4.	REFRIGERANT CYCLE DIAGRAMS ............................................................................		14
5.	WIRING DIAGRAM ........................................................................................................		17
6.	SPECIFICATIONS OF ELECTRICAL PARTS ...............................................................		19
	6-1.	Indoor Unit ................................................................................................................................	19
	6-2.	Outdoor Unit .............................................................................................................................	20
7.	MICROCOMPUTER BLOCK DIAGRAMS .....................................................................		21
8.	OPERATION DESCRIPTIONS .......................................................................................		23
	8-1.	FAN ONLY Operation ...............................................................................................................	23
	8-2.	COOL Operation .......................................................................................................................	23
	8-3.	DRY Operation ..........................................................................................................................	24
	8-4.	HEAT Operation ........................................................................................................................	25
	8-5.	AUTO Operation .......................................................................................................................	26
	8-6.	ECONO. Mode ...........................................................................................................................	27
	8-7.	Current Limit Control ...............................................................................................................	27
	8-8.	High-Temperature Limit Control .............................................................................................	28
	8-9.	Low-Temperature Limit Control (Cooling Operation) ..........................................................	28
	8-10.	Cool Airflow Prevention Control (Heating Operation) .........................................................	29
	8-11.	Defrost Operation .....................................................................................................................	29
	8-12.	Auto Restart Function .............................................................................................................	31
	8-13.	Operation Control of Following Outdoor Unit .......................................................................	33
9. TROUBLESHOOTING CHART ......................................................................................			34
	9-1.	What to be Prechecked First ...................................................................................................	34
	9-2.	Primary Judgement of Trouble Sources ................................................................................	36
	9-3.	Troubleshooting Flowcharts ...................................................................................................	40
	9-4.	How to Check the Remote Control (Including the Indoor P.C. Board) ...............................	47
10.	PART REPLACEMENT ..................................................................................................		52
	10-1.	Indoor Unit ................................................................................................................................	52
	10-2.	Microcomputer .........................................................................................................................	54
	10-3.	Outdoor Unit .............................................................................................................................	55
11.	CAUTIONS ON REPLACEMENT OF P.C. BOARD ASSEMBLY ...................................		64
12.	EXPLODED VIEWS AND PARTS LIST .........................................................................		65
	12-1.	Indoor Unit (1) ...........................................................................................................................	65
		Indoor Unit (2) ...........................................................................................................................	66
		Indoor Unit (3) ...........................................................................................................................	67
	12-2.	Outdoor Unit .............................................................................................................................	68

– 2 –

1. DESCRIPTION

RAS-M18SAH-E

RAS-M18SAH-E can be used alone with two indoor units RAS-10SKH-E-1.

RAS-3M31SAH-E-1

in a combination of two outdoor units

RAS-13SAH-E (upper unit, one compressor)

RAS-M18SAH-E (lower unit, two compressors)

The upper unit can be used with one indoor unit RAS-13SKH-E and the lower unit with two indoor units RAS-10SKH-E-1.

RAS-4M36SAH-E

The lower unit RAS-M18SAH-E can be used as a double decker under the combination name RAS-4M36SAH-E with four indoor units RAS-10SKH-E-1.

– 3 –

2. SPECIFICATIONS

RAS-10SKH-E-1 x 2 / RAS-M18SAH-E

			Model			RAS-10SKH-E-1 x 2 / RAS-M18SAH-E
Item						Cooling				Heating
Capacity	*1 kW			220V		230V	240V		220V	230V	240V
				5,0		5,0	5,0		5,6	5,6	5,6
		Phase					Single
Power source		V					220/230/240
		Hz					50
Power consumption		kW			2,04/2,10/2,18				1,78/1,86/1,96
Power factor		%				95/92/89				94/91/87
Running current		A		220V		230V	240V		220V	230V	240V
		Indoor/Outdoor		0,22/9,54		0,22/9,7	0,22/9,96		0,22/8,38	0,22/8,66	0,22/9,16
Starting current		A					19
Moisture removal		lit/h					1,2
Noise	Indoor (H/M/L)	dB					41/36/31
	Outdoor (220/230/240V)	dB					52/53/54
Refrigerant	Name of refrigerant						R-22
	Rated volume	kg					1,4 (0,7+0,7)
Refrigerant control							Capillary tube
	Gas side size	mm					9,52
	Connection type						Flare connection
	Liquid side size	mm					6,35
Interconnection pipe	Connection type						Flare connection
	Maximum length (One way)	m	*2				15
	Maximum height difference
	Indoor unit	m						5
	Outdoor unit
Condensate drain pipe	Outer diameter	mm					16
INDOOR UNIT							RAS-10SKH-E-1
	Height	mm					265
Dimensions	Width	mm					790
	Depth	mm					174
Net weight		kg						8
Evaporator type							Finned tube
Indoor fan type							Cross flow fan
	High fan	m3/h					600
Air volume	Medium fan	m3/h					500
	Low fan	m3/h					400
Fan motor output		W					19
Air filter						Polypropylene net filter (Washable)
OUTDOOR UNIT							RAS-M18SAH-E
	Height	mm					538
Dimensions	Width	mm					830
	Depth	mm					300
Net weight		kg					55
Condenser type							Finned tube
Outdoor fan type							Propeller
Airflow volume	(220/230/240V)	m3/h					1830/1920/2010
Fan motor output		W					28
Compressor	Model						PH120T1-4C x 2
	Output	W					750W x 2
Safety device							Fuse, Overload relay
Auto louver							Yes
Usable outdoor temperature range		°C				21 ~ 43				– 5 ~ 21

Specifications are subject to change without notice.

– 4 –

			Model		RAS-10SKH-E-1 / RAS-M18SAH-E
	Item				Cooling			Heating
	Capacity	*1	kW	220V	230V	240V	220V	230V	240V
				2,50	2,50	2,50	2,80	2,80	2,80
			Phase			Single
	Power source		V			220/230/240
			Hz				50
	Power consumption		kW		1,02/1,05/1,09			0,89/0,93/0,98
	Power factor		%		95/92/89			94/91/87
	Running current		A	220V	230V	240V	220V	230V	240V
			Indoor/Outdoor	0,11/4,77	0,11/4,85	0,11/4,98	0,11/4,19	0,11/4,33	0,11/4,58

– 5 –

RAS-10SKH-E-1 x 2, RAS-13SKH-E / RAS-3M31SAH-E-1

Model

RAS-10SKH-E-1 x 2, RAS-13SKH-E / RAS-3M31SAH-E-1

Item

Cooling

Heating

Capacity

*1 kW

220V

230V

240V

220V

230V

240V

8,45

8,50

8,50

9,60

9,65

9,70

Phase

Single

Power source

V

220/230/240

Hz

50

Power consumption

kW

3,30/3,38/3,48

2,97/3,09/3,23

Power factor

%

96/93/90

94/93/89

Running current

A

220V

230V

240V

220V

230V

240V

Indoor/Outdoor

0,37/15,24

0,37/15,36

0,37/15,71

0,37/13,92

0,37/14,14

0,37/14,70

Starting current

A

19+19+25

Moisture removal

lit/h

1,2+1,2+2,0

Noise

Indoor (H/M/L)

dB

RAS-10SKH-E-1 : 41/36/31

RAS-13SKH-E : 44/39/36

Outdoor (220/230/240V)

dB

52/53/54

Refrigerant

Name of refrigerant

R-22

Rated volume

kg

2,28 (0,7+0,7+0,88)

Refrigerant control

Capillary tube

Gas side size

mm

RAS-10SKH-E-1 : 9,52

RAS-13SKH-E : 12,7

Connection type

Flare connection

Liquid side size

mm

6,35

Interconnection pipe

Connection type

Flare connection

Maximum length (One way)

m

*2

15

Maximum height difference

Indoor unit

m

RAS-10SKH-E-1 : 5

RAS-13SKH-E : 6

Outdoor unit

Condensate drain pipe

Outer diameter

mm

16

INDOOR UNIT

RAS-10SKH-E-1

RAS-13SKH-E

Height

mm

265

Dimensions

Width

mm

790

Depth

mm

174

Net weight

kg

8

Evaporator type

Finned tube

Indoor fan type

Cross flow fan

High fan

m3/h

600

650

Air volume

Medium fan

m3/h

500

560

Low fan

m3/h

400

510

Fan motor output

W

19

Air filter

Polypropylene net filter (Washable)

OUTDOOR UNIT

RAS-3M31SAH-E-1

Height

mm

1125

Dimensions

Width

mm

830

Depth

mm

300

Net weight

kg

106

Condenser type

Finned tube

Outdoor fan type

Propeller

Airflow volume

(220/230/240V)

m3/h

1830/1920/2010

Fan motor output

W

28

Compressor

Model

PH120T1-4C x 2 + PH170T2-4L2

Output

W

750W x 2 + 1100W x 1

Safety device

Fuse, Overload relay

Auto louver

Yes

Usable outdoor temperature range

°C

21 ~ 43

– 5 ~ 21

Specifications are subject to change without notice.

– 6 –

			Model		RAS-10SKH-E-1, RAS-13SKH-E / RAS-3M31SAH-E-1
	Item				Cooling			Heating
	Capacity	*1	kW	220V	230V	240V	220V	230V	240V
				5,95	6,00	6,00	6,80	6,85	6,90
			Phase			Single
	Power source		V			220/230/240
			Hz				50
	Power consumption		kW		2,28/2,33/2,39			2,08/2,16/2,25
	Power factor		%		97/94/91			95/93/90
	Running current		A	220V	230V	240V	220V	230V	240V
			Indoor/Outdoor	0,26/10,47	0,26/10,51	0,26/10,73	0,26/9,73	0,26/9,81	0,26/10,12
			Model		RAS-10SKH-E-1 x 2 / RAS-3M31SAH-E-1
	Item				Cooling			Heating
	Capacity	*1	kW	220V	230V	240V	220V	230V	240V
				5,0	5,0	5,0	5,6	5,6	5,6
			Phase			Single
	Power source		V			220/230/240
			Hz				50
	Power consumption		kW		2,04/2,10/2,18			1,78/1,86/1,96
	Power factor		%		95/92/89			94/91/87
	Running current		A	220V	230V	240V	220V	230V	240V
			Indoor/Outdoor	0,22/9,54	0,22/9,70	0,22/9,96	0,22/8,38	0,22/8,66	0,22/9,16
			Model		RAS-13SKH-E / RAS-3M31SAH-E-1
	Item				Cooling			Heating
	Capacity	*1	kW	220V	230V	240V	220V	230V	240V
				3,45	3,50	3,50	4,00	4,05	4,10
			Phase			Single
	Power source		V			220/230/240
			Hz				50
	Power consumption		kW		1,26/1,28/1,30			1,19/1,23/1,27
	Power factor		%		98/96/92			95/95/93
	Running current		A	220V	230V	240V	220V	230V	240V
			Indoor/Outdoor	0,15/5,70	0,15/5,66	0,15/5,75	0,15/5,54	0,15/5,48	0,15/5,54
			Model		RAS-10SKH-E-1 / RAS-3M31SAH-E-1
	Item				Cooling			Heating
	Capacity	*1	kW	220V	230V	240V	220V	230V	240V
				2,50	2,50	2,50	2,80	2,80	2,80
			Phase			Single
	Power source		V			220/230/240
			Hz				50
	Power consumption		kW		1,02/1,05/1,09			0,89/0,93/0,98
	Power factor		%		95/92/89			94/91/87
	Running current		A	220V	230V	240V	220V	230V	240V
			Indoor/Outdoor	0,11/4,77	0,11/4,85	0,11/4,98	0,11/4,19	0,11/4,33	0,11/4,58
					– 7 –

RAS-10SKH-E-1 x 4 / RAS-4M36SAH-E

			Model			RAS-10SKH-E-1 x 4 / RAS-4M36SAH-E
Item						Cooling				Heating
Capacity	*1 kW			220V		230V	240V		220V	230V	240V
				10,0		10,0	10,0		11,2	11,2	11,2
		Phase					Single
Power source		V					220/230/240
		Hz					50
Power consumption		kW			4,08/4,20/4,36				3,56/3,72/3,92
Power factor		%				95/92/89				94/91/87
Running current		A		220V		230V	240V		220V	230V	240V
		Indoor/Outdoor		0,44/19,08		0,44/19,4	0,44/19,92		0,44/16,76	0,44/17,32	0,44/18,32
Starting current		A					19+19+19+19
Moisture removal		lit/h					1,2+1,2+1,2+1,2
Noise	Indoor (H/M/L)	dB					41/36/31
	Outdoor (220/230/240V)	dB				54/55/56				55/56/57
Refrigerant	Name of refrigerant						R-22
	Rated volume	kg					2,8 (0,7+0,7+0,7+0,7)
Refrigerant control							Capillary tube
	Gas side size	mm					9,52
	Connection type						Flare connection
	Liquid side size	mm					6,35
Interconnection pipe	Connection type						Flare connection
	Maximum length (One way)	m	*2				15
	Maximum height difference
	Indoor unit	m						5
	Outdoor unit
Condensate drain pipe	Outer diameter	mm					16
INDOOR UNIT							RAS-10SKH-E-1
	Height	mm					265
Dimensions	Width	mm					790
	Depth	mm					174
Net weight		kg						8
Evaporator type							Finned tube
Indoor fan type							Cross flow fan
	High fan	m3/h					600
Air volume	Medium fan	m3/h					500
	Low fan	m3/h					400
Fan motor output		W					19
Air filter						Polypropylene net filter (Washable)
OUTDOOR UNIT							RAS-4M36SAH-E
	Height	mm					1125
Dimensions	Width	mm					830
	Depth	mm					300
Net weight		kg					119
Condenser type							Finned tube
Outdoor fan type							Propeller
Airflow volume	(220/230/240V)	m3/h					1830/1920/2010
Fan motor output		W					28
Compressor	Model						PH120T1-4C
	Output	W					750W x 4
Safety device							Fuse, Overload relay
Auto louver							Yes
Usable outdoor temperature range		°C				21 ~ 43				– 5 ~ 21

Specifications are subject to change without notice.

– 8 –

			Model		RAS-10SKH-E-1 x 3 / RAS-4M36SAH-E
	Item				Cooling			Heating
	Capacity	*1	kW	220V	230V	240V	220V	230V	240V
				7,50	7,50	7,50	8,40	8,40	8,40
			Phase			Single
	Power source		V			220/230/240
			Hz				50
	Power consumption		kW		3,06/3,15/3,27			2,67/2,79/2,94
	Power factor		%		97/94/91			95/93/90
	Running current		A	220V	230V	240V	220V	230V	240V
			Indoor/Outdoor	0,33/14,31	0,33/14,55	0,33/14,94	0,33/12,57	0,33/12,99	0,33/13,74
			Model		RAS-10SKH-E-1 x 2 / RAS-M36SAH-E
	Item				Cooling			Heating
	Capacity	*1	kW	220V	230V	240V	220V	230V	240V
				5,0	5,0	5,0	5,6	5,6	5,6
			Phase			Single
	Power source		V			220/230/240
			Hz				50
	Power consumption		kW		2,04/2,10/2,18			1,78/1,86/1,96
	Power factor		%		95/92/89			94/91/87
	Running current		A	220V	230V	240V	220V	230V	240V
			Indoor/Outdoor	0,22/9,54	0,22/9,70	0,22/9,96	0,22/8,38	0,22/8,66	0,22/9,16
			Model		RAS-10SKH-E-1 / RAS-4M36SAH-E
	Item				Cooling			Heating
	Capacity	*1	kW	220V	230V	240V	220V	230V	240V
				2,50	2,50	2,50	2,80	2,80	2,80
			Phase			Single
	Power source		V			220/230/240
			Hz				50
	Power consumption		kW		1,02/1,05/1,09			0,89/0,93/0,98
	Power factor		%		95/92/89			94/91/87
	Running current		A	220V	230V	240V	220V	230V	240V
			Indoor/Outdoorr	0,11/4,77	0,11/4,85	0,11/4,98	0,11/4,19	0,11/4,33	0,11/4,58

– 9 –

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	—
(DB)	35°C	7°C
Outdoor unit inlet air temperature
(WB)	24°C	6°C
Notes : *2
RAS-13SKH-E / RAS-3M31SAH-E-1

•No additional refrigerant required.

•This air conditioner accepts a connection piping length of up to 15m and a head of up to 6m.

•There is no need to add the refrigerant as long as the total length of the connection piping is up to 15m.

RAS-10SKH-E-1 / RAS-M18SAH-E,

RAS-10SKH-E-1 / RAS-3M31SAH-E-1,

RAS-10SKH-E-1 / RAS-4M36SAH-E

•This air conditioner accepts a connection piping length of up to 15m and a head of up to 5m.

•There is no need to add the refrigerant as long as the total length of the connection piping is up to 10m.

•There is need to add the refrigerant 20g/m as long as the each length of the connection piping is up to 11m to 15m.

– 10 –

3. CONSTRUCTION VIEWS

3-1. Indoor Unit

RAS-10SKH-E-1

RAS-13SKH-E

Air inlet	Air filter	Heat exchanger
	790	174

265	АААААА€,,,,,,@@@@@@€€€€€		50
	,,,,,,@@@@@@АААААА€€€€€€
		47	10

Air outlet

Knock out system

	790
232	326	232	Front panel
	Hanger		Back body

		47
		50
Drain hose (0,54m)	321	10
Hanger		Knock out system
Connecting pipe (0,39m)		Connecting pipe (0,49m)
13SKH-E	: (Flare ø12,7)	(Flare ø6,35)
10SKH-E-1: (Flare ø9,52)

		65,5		659	65,5	Hanger	Wireless
				450
						For stud bolt	remote
	Hanger			326			control
						(ø8~ø10)
				66 or more
				Minimum		For stud bolt
46	20	2,5		distance	20	(ø6)
				to ceiling
							55
		Minimum			20	Minimum	Remote
265	17	distance				distance to wall	control
		to wall					holder
		120 or more			120 or more
40,5	3,5				37	40,5
			Hanger	Hanger
			Center line	Installation			59,6
				plate outline
					60,5
		76	319	269	126
				790

136

16

112,8 5

– 11 –

– 12 –

					A	120	φ25 Drain outlet	RAS	.2-3
	A Detail Drawing
			600					-	UnitOutdoor
325	φ11x14301	hole		325	52			E-M18SAH
		50	R10
		36
			23
			φ6 hole
								8-φ6 hole
								(for fixing outdoor unit)
					Fan guard			6-φ11x14 hole
Handle								(for φ8-φ10 anchor bolt)

φ420

538

54 54

			Electric
		Service	parts cover
			Liquid side
		port
	FOR UNIT B		(Flare φ6,35)

			54	FOR UNIT A		Gas side
						(Flare φ9,52)
			91
90	600	90	50
300	830		60		344
				Installation dimension
				100 or more	600
					Air inlet
						600 or more
				Air inlet
				325
				100 or more	600 or more	4xφ11x14
						for φ8-φ10
				Air outlet

anchor bolt

A Detail Drawing

36	600
50	R12
325 311	23
	φ 6 hole

φ11x14 hole

A	120	φ25 Drain outlet

325

52,5

		Mounting dimension of anchor bolt
		100 or more	600
			Air inlet
			600 or more
		Air inlet
		325
8-φ6 hole	100 or more		4-φ11x14
		Air outlet	600 or more for φ8-φ10
(for fixing outdoor unit)			anchor bolt
4-φ11x14 hole
			300
(for φ8 φ10 anchor bolt)

E-4M36SAH-RAS	E-3M31SAH-RAS
	1-

– 13 –

Drain outlet

1125

			54
			60
			Handle
			677,5
			54
			54
			54
			91
90	600	90	55
29	835		60

	Electrical
	parts cover
	Liquid side
	(Flare φ6,35)
Service
port	Gas side (Flare)
	Model name	Size
	RAS-3M31SAH-E-1 φ12,7
186	RAS-4M36SAH-E	φ9,52

		Electrical
	Service	parts cover
		Liquid side
	port
		(Flare φ6,35)
		Gas side
		(Flare φ9,52)

(8,5)	325 (pitch)	(8,5)
	342

4. REFRIGERANT CYCLE DIAGRAMS

RAS-10SKH-E-1 x 2 / RAS-M18SAH-E

T1

Indoor Unit

Indoor heat exchanger A

Indoor heat exchanger B

	P
	Packed valve	Packed valve
	(3/8)	(1/4)
	4-way valve		Capillary
		Check
			for heating
		valve	ø1,7x300
	Compressor	Compressor	Capillary
			for cooling & heating
	PH120T1-4C	PH120T1-4C	ø1,7x800
			Dryer
	Accumulator
	Outdoor heat exchanger		Cooling
			Heating

Outdoor Unit

Standard pressure

Surface temp. of heat

Ambient temp.

50Hz

P

exchanger interchanging

Fan speed

conditions DB/WB

(°C)

(kg/cm²G)

pipe

T1

(°C)

(indoor)

10SKH-E-1

10SKH-E-1

Indoor

Outdoor

Standard

15,0

40,0

High

20/–

7/6

Heating

High temperature*1

19 ~ 23

52,0 ~ 59,0

Low

27/–

21/15

Low temperature

12,5

35,0

High

20/–

–10/–10

Standard

6,0

12,0

High

27/19

35/24

Cooling

High temperature

6,5

15,0

High

32/23

43/26

Low temperature

4,0

2,0

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.

– 14 –

RAS-10SKH-E-1 x 2, RAS-13SKH-E / RAS-3M31SAH-E-1 (Upper and Lower Unit)

			RAS-13SKH-E	T1		RAS-10SKHE-1 x 2	T1
			Indoor Unit			Indoor Unit
	Cooling		Heat exchanger			Indoor heat
						exchanger A
0,49m		Heating			0,39m
(Connecting					(Connecting
pipe)			Cross flow fan		pipe)	Indoor heat
ø12,7					ø6,35
						exchanger B

O.D.:						O.D.:
12,7mm	P					6,35mm
	Packed valve			Packed valve			P
	(ø12,7)			(ø6,35)
	Gas container connection (Reinstall etc.)							Packed	Packed
								valve	valve
Cooling	Heating							(3/8)	(1/4)
	4-way valve
			-4L2				4-way valve		Check	Capillary
				Capillary tube
									valve	for heating
Heating	Cooling	Comp-	PH170T2
				ø0,6x1500						ø1,7x300
		ressor
							Comp-		Comp-
		Accumulator		Capillary tube			ressor		ressor	Capillary
							PH120T14C-	PH120T14C-
				ø1,2x400		Accumulator				for cooling
										& heating
			Capillary tube							ø1,7x800
			ø1,7x400							Dryer
		Heat exchanger
Cooling				Refrigerant				Outdoor heat		Cooling
Heating		Propeller fan		R-22	0,88kg			exchanger		Heating
		Outdoor Unit						Outdoor Unit

Mark ( ) means check points of Gas Leak

Standard pressure

Surface temp. of heat

Ambient temp.

50Hz

P

exchanger interchanging

Fan speed

conditions DB/WB

(kg/cm²G)

pipe

T1

(°C)

(indoor)

(°C)

13SKH-E

10SKH-E-1

13SKH-E

10SKH-E-1

Indoor

Outdoor

Standard

15,0

43,0

40,0

High

20/–

7/6

Heating

High temperature*1

19 ~ 23

52,0 ~ 59,0

Low

27/–

21/15

Low temperature

12,5

35,0

High

20/–

–10/–10

Standard

5,0

6,0

10,0

12,0

High

27/19

35/24

Cooling

High temperature

6,0

6,5

14,0

15,0

High

32/23

43/26

Low temperature

4,0

2,0

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 –

RAS-10SKH-E-1 x 4 / RAS-4M36SAH-E (Upper and Lower Unit)

Indoor Unit

T1

Indoor heat

exchanger A

Indoor heat

exchanger B

P

			Packed	Packed
			valve	valve
			(3/8)	(1/4)
		4-way valve		Check	Capillary
				valve	for heating
Accumulator	PH120T1-4C		PH120T1-4C		ø1,7x300
		Comp-		Comp-
		ressor		ressor	Capillary
					for cooling
					& heating
					ø1,7x800
					Dryer

	Outdoor heat	Cooling
		Heating
	exchanger

Outdoor Unit

Indoor Unit

T1

Indoor heat

exchanger A

Indoor heat

exchanger B

P

			Packed	Packed
			valve	valve
			(3/8)	(1/4)
		4-way valve		Check	Capillary
				valve	for heating
Accumulator	PH120T1-4C		PH120T1-4C		ø1,7x300
		Comp-		Comp-
		ressor		ressor	Capillary
					for cooling
					& heating
					ø1,7x800
					Dryer

	Outdoor heat	Cooling
		Heating
	exchanger

Outdoor Unit

Standard pressure

Surface temp. of heat

Ambient temp.

50Hz

P

exchanger interchanging

Fan speed

conditions DB/WB

(°C)

(kg/cm²G)

pipe

T1

(°C)

(indoor)

10SKH-E-1

10SKH-E-1

Indoor

Outdoor

Standard

15,0

40,0

High

20/–

7/6

Heating

High temperature*1

19 ~ 23

52,0 ~ 59,0

Low

27/–

21/15

Low temperature

12,5

35,0

High

20/–

–10/–10

Standard

6,0

12,0

High

27/19

35/24

Cooling

High temperature

6,5

15,0

High

32/23

43/26

Low temperature

4,0

2,0

Low

21/15

21/15

Note :

•

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

*1 •

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

– 16 –

5. WIRING DIAGRAM

INDOOR UNIT

OUTDOOR UNIT

RAS - 13SKH - E / RAS - 3M31SAH - E - 1 (Upper Unit)

LOUVER

MOTOR

DC

FAN MOTOR

MOTOR

THERMAL FUSE

77°C × 2

BLU PNK YEL ORN RED BRW

GRY

GRY

WHI BLU YEL BLK RED

1

3

CN04

6

5 4

3

2 1

5 4

3

2 1

1

3

CN07 6

5 4

3

2 1

5 4

3

2 1

CN10

BLK

SG01

R109

R116

MAIN P.C. BOARD

GRN&YEL P04

DSA

VARISTOR

MCC-713

IC04

F01 FUSE

L

BRW

T3,15A

R01

DB01

T01

COLOR IDENTIFICATION

N

250V

C01

C02

DC 35V

BRW : BROWN

BLU

POWER

3

3

R21

C15

L01

DC 12V

RED : RED

TERMINAL

WHI : WHITE

RY02

RY01

BLOCK

YEL : YELLOW

INDOOR UNIT

4

4

DC 7V

BLU : BLUE

T02

BLK

1

BLK

C.T.

BLK : BLACK

WHI

DC 0V

GRY : GRAY

2

TERMINALS

1 2 3 4

RED

WHI

3

PNK : PINK

GRN & YEL

BLU

BLK

4

C06

CHASSIS

GRN&YEL

IC02

ORN : ORANGE

OVERLOAD RELAY

BRW

BRW

INDOOR

BLK

IC

GRN&YEL : GREEN &

THERMOSTAT FOR

TERMINAL

SOLENOID

RY03

RY04

YELLOW

COMPRESSOR

CAPACITOR

BLOCK

IC01

COIL

1 2 3 4 5 6 7 8 9

1 2

CN03

1 2

CN01

BLK

RED

RED

2

CR01

BLU BLU BLU BLU BLU BLU PNK BLK WHI

CN13

1

2

1

2

COMPRESSOR

PNK

CAPACITOR

RED

BLK BLK

BLK BLK

1 1

WHI

3

CR02

1

2

3 4

5

6

7

8

9

1

2 3 4

5 6 7 8 9 CN25

THERMO

HEAT

WHI

BLK

4 4

INFRARED RAYS RECEIVE

SENSOR

EXCHANGER

CN27

AND INDICATION PARTS

(TA)

SENSOR

DSA : Surge absorbor

FAN MOTOR

(TC)

C.T : Current trans

OVERLOAD

CAPACITOR

RAS - 10SKH - E - 1x2/RAS - M18SAH-E

RELAY

WHI

1

BLK

4

3

BLK

PNK

RED

RAS - 10SKH - E - 1x2/RAS - 3M31SAH-E-1 (Lower Unit)

2

WHI

RY01

COMPRESSOR

3

BLK

RED

RAS - 10SKH - E - 1x2/RAS - 4M36SAH-E

DSA : Surge absorbor

4

CN09

TERMINALS

(Upper and Lower Unit)

LOUVER

C.T : Current trans

LOUVER

1 1

3 3

MOTOR

DC

MOTOR

DC

CN04

FAN MOTOR

FAN MOTOR

OVERLOAD

CAPACITOR

MOTOR

MOTOR

RELAY

WHI

THERMAL FUSE

THERMAL FUSE

BLK

1

4

3

BLK

PNK

77°C × 2

77°C × 2

RED

GRY

GRY

BLU PNK

YEL ORN

RED BRW

WHI BLU

YEL BLK RED

GRY

GRY

BLU PNK

YEL ORN

RED BRW

WHI

BLU

YEL BLK RED

2

WHI

RY02

COMPRESSOR

3

BLK

RED

1

3

6

5 4

3

2 1

5 4

3

2 1

1

3

6

5 4

3

2 1

5 4

3

2 1

4

CN10

CN04

CN10

CN04

CN10

TERMINALS

1

3

CN07 6

5 4

3

2 1

5 4

3

2 1

1

3

CN07 6

5 4

3

2 1

5 4

3

2 1

1

1

BLK SG01 R109

MAIN P.C. BOARD

SG01

R109

MAIN P.C. BOARD

R116

BLK

R116

CN05

GRN&YEL P04 DSA VARISTOR

MCC-713

GRN&YEL

P04

DSA

VARISTOR

MCC-713

3 3

IC04

IC04

MAIN P.C. BOARD (MCC-738)

F01 FUSE

F01 FUSE

F01

BRW T3,15A

R01

DB01

T01

L

BRW

T3,15A

R01

DB01

T01

5 5

Fuse

R01

CN11

L

C02

C02

BLK

1

N 250V

C01

DC35V

N

250V

C01

DC35V

L

BLU

RED

2

BLU

N

3 3

SG01

3 3

R21

C15

POWER

3

3

R21

C15

YEL & GRN

R02

C01

C02

3

POWER

L01

DC12V

L01

DC12V

1 1

300V

4

TERMINAL

RY01

TERMINAL

RY02

RY01

CN01

5

RY02

BLOCK

6

BLOCK

4 4

4

4

RED

1 1 CN02

7

DC7V

DC7V

RY06

RY04

RY03

8

BLK

T02

BLK

WHI

3 3

T02

C.T.

C.T.

CN12

HEAT

WHI

DC0V

WHI

DC0V

TRANSFORMER

1 1

BLK

EXCHANGER

2

SENSOR

C06

C06

BLU

CN

3

3

BLK

CR04

CR02

CR01

(TE)

RY03 RY04

IC02

RY03 RY04

IC02

1 1

YEL

2

2

03

CN13

& YEL

YEL&

ORN

IC

IC

3 3

BLK

HEAT

GRN

GRN

1 1

IC01

CR01

IC01

2

EXCHANGER

SENSOR

CR01

1

2

3 4

5

6

7

8

9

1

2

CN03

1

2

CN01

1

2

3 4

5

6

7

8

9

1

2

CN03

1

2

CN01

CN08

CN07

CN06

3

3

BLK

1 1

1 1

1

3

(TE)

BLU BLU BLU BLU BLU BLU PNK BLK WHI

CN13

1

2

1

2

BLU BLU BLU BLU BLU BLU PNK BLK WHI

CN13

1

2

1

2

5

3

1

3

1

2

2

5

3

1

CR02

BLK

BLK

3 CR02

BLK

BLK

BLK

BLK

3

BLK

BLK

BLK

BLK

BLK

RED

4 4

4 4

BLK WHI RED BLU CN27

1 2 3 4

5 6

7 8 9

BLK WHI RED

BLU

1 2 3 4

5 6

7 8 9

1

2

1 2 3 4

5 6

7 8 9 CN25

THERMO

HEAT

CN27

1 2 3 4

5 6

7 8 9 CN25

THERMO

HEAT

BLK

INFRARED RAYS RECEIVE

SENSOR

EXCHANGER

INFRARED RAYS RECEIVE

SENSOR

EXCHANGER

UNIT B

UNIT A

INDOOR

AND INDICATION PARTS

(TA)

SENSOR

AND INDICATION PARTS

(TA)

SENSOR

RED

RED

COIL FOR

COIL FOR

TERMINAL 1 2 3 4

(TC)

1 2 3 4

(TC)

WHI

4 WAY

4 WAY

BLOCK

VALVE

VALVE

FAN MOTOR

CAPACITOR

– 17 –

– 18 –

6. SPECIFICATIONS OF ELECTRICAL PARTS

6-1. Indoor Unit

RAS-10SKH-E-1

RAS-13SKH-E

	No.	Parts name	Type	Specifications
			ICF-35-19-3
	1	Fan motor (for indoor)	or	DC 35V, 19W
			TICF-35-19-3
	2	Thermo. sensor	(microprocessor)	10kΩ at 25°C
		(TA-sensor)
	3	DC-DC transformer (T01)	SWT-34	DC390V, Secondary DC35V, 12V, 7V
	4	Microcomputer	TMP87CK40F
	5	Power relay (RY01),	DI1U	Coil : DC12V 75mA, Rated AC250V 20A
		Common relay (RY02)
	6	Heat exchanger sensor	(microprocessor)	10kΩ at 25°C
		(TC-sensor)
	7	Line filter (L01)	RF-103YOR6	10mH, AC 0,6A
	8	Diode (DB01)	RBV-406	4A, 600V
	9	Capacitor (C02)	CEAUF2W101M20	100µF, 450V
	10	Fuse (F01)	MT3	T3,15A, 250V
	11	Relay (for outdoor fan motor,	AJQ1341	Coil DC12V, 33mA, Rated 1A 250V AC
		solenoid coil) (RY03, RY04)
	12	Power supply IC (IC01)	MA2830-FJ	4A, 600V
	13	Varistor (R21, R109)	15G561K	560V
	14	Resistor (R01)	ERF-5TK5R6	5,6 Ω, 5W
	15	Current trans (T02)	CT422920S-01
	16	Louver motor	MP35EA7	Output (Rated) 2W, 10 poles, 1 phase DC 12V

– 19 –

6-2. Outdoor Unit

RAS-3M31SAH-E-1 (Upper Unit)

No.	Parts name	Type		Specifications
			Output (Rated) 1100W, 2 pole, 1 phase, 220/230/240V, 50Hz
1	Compressor	PH170T2-4L2	Winding resistance (Ω)		Red-Black	White-Black
			(at 20°C)		2,22	3,04
			Output (Rated) 28W, 6 pole, 1 phase, 220/230/240V, 50Hz
2	Fan motor (for outdoor)	AF-230-28P	Winding resistance (Ω)		Red-Black	White-Black
			(at 20°C)		198	160
3	Running capacitor	SK-50FMP	500V AC, 1,5µF
	(for fan motor)
4	Running capacitor	SK-40CMP35U1	400V AC, 35µF
	(for compressor)
5	Solenoid coil	LB60012	AC : 200/240V
	(for 4-way valve)
6	Overload relay	J-MRA99257-9200	UT 8,0A (80°C), OPEN 145±5°C, CLOSE 75±11°C
7	Thermostat for Compressor	CS-7	130°C OFF, 70°C ON

RAS-M18SAH-E

RAS-3M31SAH-E-1 (Lower Unit)

RAS-4M36SAH-E (Upper and Lower Unit)

No.	Parts name	Type		Specifications
			Output (Rated) 750W, 2 pole, 1 phase, 220/230/240V, 50Hz
1	Compressor	PH120T1-4C
			Winding resistance (Ω)		Red-Black	White-Black
			(at 20°C)		4,53	8,73
			Output (Rated) 28W, 6 pole, 1 phase, 220/230/240V, 50Hz
2	Fan motor (for outdoor)	AF-230-28P	Winding resistance (Ω)		Red-Black	White-Black
			(at 20°C)		198	160
3	Running capacitor	SK-45FMP	450V AC, 2µF
	(for fan motor)
4	Running capacitor	SK-40CMP30U1	400V AC, 30µF
	(for compressor)
5	Solenoid coil	LB60012	AC : 200/240V
	(for 4-way valve)
6	Overload relay	J-MRA99269-9200	U/T 6,8A (90°C), OPEN 135±5°C, CLOSE 69±11°C
7	Transformer	FT-70	AC : 220/240V
8	Outdoor P.C. board	MCC-738
9	Heat exchanger sensor	(microprocessor)	10kΩ at 25°C
	(TE-sensor)

– 20 –

		Main Unit Control Panel			C. P. U
	Heat Exchanger Sensor		Functions			Operation
						Display
	Thermo. Sensor		• Louver Control			Timer
						Display
	Current Sensor		• 3-minutes Delay at Restart for Compressor
	(Compressor Current)					ECONO.
	Infrared Rays Signal Receiver					Sign Display
	Infrared	Initializing Circuit	• Motor Revolution Control			PRE-DEF.
						Sign Display
	Rays
		Clock Frequency	• Processing
	Remote Control
		Oscillator Circuit
			(Temperature Processing)
						Indoor
	Operation (START/STOP)		• Timer			Fan Motor
–	Operation Mode Selection
21
	AUTO, COOL, DRY, HEAT, FAN ONLY	Power	Compressor	Outdoor Fan	4-Way Valve	Louver
–		Supply	ON/OFF	ON/OFF	ON/OFF	ON/OFF
	Thermo. Setting	Circuit	Signal	Signal	Signal	Signal
	Fan Speed Selection					Louver
		Noise Filter		Relay Driver, Louver Driver
						Motor
	ON TIMER Setting
	OFF TIMER Setting			Relay	Relay	Relay
	Louver AUTO Swing			RY01	RY03	RY04
	Louver Direction Setting
	ECONO.		Relay
			RY02
	AC220/230/240V ~			Compressor	Outdoor Fan Motor	4-Way Valve
	50Hz

Unit) (Upper 1-E-3M31SAH-RAS / E-13SKH-RAS

DIAGRAMS BLOCK MICROCOMPUTER .7

		ON/OFF Signal				-RAS	-RAS	-RAS
						/1-E-10SKH	/1-E-10SKH	/1-E-10SKH
		C. P. U
Heat Exchanger Sensor (A)		Compressor (A)
						E-4M36SAH-RAS	E-3M31SAH-RAS	E-M18SAH-RAS
Heat Exchanger Sensor (B)
	Compressor (A)	Compressor (B)
	ON/OFF Signal
		ON/OFF Signal
	Relay		Relay		4-Way
					Valve (A)
	RY01	4-Way Valve (A)	Relay	RY03
Compressor (A)		ON/OFF Signal	Driver				Unit)(Lower 1-
						Lowerand(Upper
		ON/OFF Signal	Relay		Fan Motor
–22–
Indoor
Unit (A)	4-Way Valve (A)	4-Way Valve (B)	Relay		4-Way
	ON/OFF Signal				Valve (B)
		ON/OFF Signal		RY04
	Outdoor Fan
	ON/OFF Signal	Outdoor Fan			Outdoor
						Unit)
	Compressor (B)			RY06
	ON/OFF Signal
	Relay
	RY02	• Compressor (A), (B) Control	Initializing
Compressor (B)			Circuit
		• 4-Way Valve (A), (B) Control
Indoor
		• Outdoor Fan Control
Unit (B)	4-Way Valve (B)		Clock Frequency
		• Defrost Control
	ON/OFF Signal		Oscillator Circuit
	Outdoor Fan		Power Supply
	ON/OFF Signal		Circuit

Note:
If unit (A) and (B) operation modes are different (as Cool, Heater Auto), operating priority is		Transformer	AC 220/230/240V
given for “Heat” mode unit, and “Cool” mode unit will be stopped due to overload relay actuate.			50Hz

8. OPERATION DESCRIPTIONS

8-1. FAN ONLY Operation

(MODE of the remote control : FAN ONLY)

(1)During this mode, the relay RY01 is always turned off so that only the indoor fan is operated. RY02 is always turnd on.

1)When the FAN is set to AUTO, the indoor fan motor operates as shown in Fig. 8-1-1.

2)When the FAN is set to LOW, MED, or HIGH, the indoor fan motor operates with a constant in volume as listed in Table 8-1-1.

temp.	28
Room	27	HIGH
	26	MED
		LOW(+)
	25
	24	LOW
		LOW

Fig. 8-1-1 Auto setting of air volume

Table 8-1-1 Manual setting of FAN SPEED

Indication of	HIGH Air volume (m3/h)
FAN SPEED	13SKH-E	10SKH-E-1
LOW	510	400
MED	560	500
HIGH	650	600

(2)Once the setting is made, the operation mode is memorized in the microcomputer so that the same operation can be effected thereafter simply by

pushing the START/STOP button.

8-2. COOL Operation

(MODE of the remote control : COOL)

(1)Compressor, 4-way valve, outdoor fan and operation display are controlled as shown in Fig. 8-2-1.

temp.)			ON			ON
Set–		+1
temp.			OFF	ON	OFF	OFF	ON
(Room
Set		0
temp.			Compressor (RY01)	relayCommon (RY02)	valveway-4 (RY04)	fanOutdoor (RY03)	OPERATION display

Fig. 8-2-1

(2)Relays RY01 and RY02 are turned on to energize the outdoor unit, and a cool operation is carried out.

1)When the FAN is set to AUTO, the indoor fan motor operates as shown in Fig. 8-2-2.

2)When the FAN is set to LOW, MED, or HIGH, the indoor fan motor operates with a constant in volume as listed in Table 8-1-1.

				FAN
temp.)
				AUTO	Manual
Set–		+4		HIGH
				MED
temp.		+3		LOW(+)	to the set
					According
(Room		+2			position
				LOW
		+1
Set		0		LOW
				(continuous)
temp.
			RY01
			OFF

Fig. 8-2-2

(3)Once the setting is made, the operation mode is memorized in the microcomputer so that the same operation can be effected thereafter simply by pushing the START/STOP button.

– 23 –