Toshiba RAS-07SKHP-E, RAS-07S2AH-E, RAS-10SKHP-E, RAS-10S2AH-E Service manual

FILE NO. SVM-07023-1

SERVICE MANUAL

AIR CONDITIONER

SPLIT WALL TYPE

RAS-07SKHP-E / RAS-07S2AH-E

RAS-10SKHP-E / RAS-10S2AH-E

Revised May, 2007

FILE NO. SVM-07023

CONTENTS

1.SPECIFICATIONS

2.CONSTRUCTION VIEWS

2-1 Indoor Unit

2-2 Outdoor Unit (RAS-10S2AH-E) 2-3 Outdoor Unit (RAS-07S2AH-E)

3.WIRING DIAGRAM

4.SPECIFICATION OF ELECTRICAL PARTS

4-1 Indoor Unit (RAS-10SKHP-E, RAS-07SKHP-E) 4-2 Outdoor Unit (RAS-10S2AH-E)

4-3 Outdoor Unit (RAS-07S2AH-E)

5.REFRIGERATION CYCLE DIAGRAM

5-1 RAS-10SKHP-E / RAS-10S2AH-E 5-2 RAS-07SKHP-E / RAS-07S2AH-E

6.CONTROL BLOCK DIAGRAM

7.OPERATION DESCRIPTION

7-1 Remote control

7-2 Outline of Air Conditioner Control

7-3 Description of Operation Mode

7-4 High-Temperature Limit Control

7-5 Low-Temperature Limit Control

7-6 Defrost Operation

7-7 Current Limit Control

7-8 One-Touch Comfort

7-9 Hi POWER Mode

7-10 QUIET Mode

7-11 ECO Operation

7-12 COMFORT SLEEP mode

7-13 Auto Restart Function

7-14 Self-Cleaning Function

- 1 -

FILE NO. SVM-07023

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 Others

9.TROUBLESHOOTING CHART

9-1 Troubleshooting Procedure

9-2 Basic Check Items

9-3 Primary Judgement

9-4 Self-Diagnosis by Remote Control (Check Code) 9-5 Troubleshooting Flowcharts

9-6 Troubleshooting for Remote Control

10.PART REPLACEMENT

10-1 Indoor Unit

10-2 Outdoor Unit

11.EXPLODED VIEWS AND PARTS LIST

11-1 Indoor Unit (E-Parts Assy)

11-2 Indoor Unit

11-3 Outdoor Unit (RAS-10S2AH-E) 11-4 Outdoor Unit (RAS-07S2AH-E)

- 2 -

FILE NO. SVM-07023

1. SPECIFICATIONS

	MODEL			RAS-10SKHP-E / RAS-10S2AH-E								RAS-07SKHP-E / RAS-07S2AH-E
ITEM				Cooling				Heating				Cooling					Heating
Capacity				220V		240V		220V		240V		220V			240V		220V			240V
			kW	2.50		2.55		2.70		2.72		2.30		2.50			2.30		2.50
			Phase								1
Power source			V							220 − 240
			Hz								50
Power consumption			kW	0.77		0.81		0.74		0.76		0.61		0.68			0.54		0.59
Power factor			%	97		94		94		91		98		96			98		96
Running	Indoor		A								0.15
current	Outdoor		A	3.45		3.43		3.30		3.23		2.69		2.77			2.35		2.40
Starting current			A		19											15
Moisture removal			lit/h								1.2
Noise	Indoor (H/M/L)		dB		40/36/32								38/33/28
	Outdoor (220-240V) dB			47		49		48		50		46			47		47			48
Refrigerant	Name of refrigerant										R-22
	Rated amount		kg		0.75											0.64
Refrigerant control										Capillary tube
	Gas side size		mm								9.52
	Connection type									Flare connection
	Liquid side size		mm								6.35
Interconnection	Connection type									Flare connection
pipe	Maximum length		m								10*1
	(One way)
	Maximum height		m								5
	difference
INDOOR UNIT						RAS-10SKHP-E									RAS-07SKHP-E
	Height		mm								250
Dimensions	Width		mm								740
	Depth		mm								195
Net weight			kg								8
Evaporator type										Finned tube
Indoor fan type										Cross flow fan
	High fan		m3/h		540				560				540					540
Airflow volume	Medium fan		m3/h		460				500				440					470
	Low fan		m3/h		390				400				350					370
Fan motor output			W								20
Air filter								Honeycomb woven filter with PP frame
OUTDOOR UNIT						RAS-10S2AH-E									RAS-07S2AH-E
	Height		mm		550											530
Dimensions	Width		mm		780											660
	Depth		mm		290											240
Net weight			kg		32											25
Condenser type										Finned tube
Outdoor fan type										Propeller fan
Airflow volume			m3/h	1740		1850		1740		1850		1640		1720			1640		1720
Fan motor output			W								20
Compressor	Model					PH150X1C-4DZDN3									PH108X1C-4DZDN2
	Output		W		750											605
Safety device										Fuse, Overload relay
Louver type										Automatic louver
Usable outdoor temperature range °C					15 ~ 43				−10 ~ 24				15 ~ 43					21 ~ 43

– 3 –

FILE NO. SVM-07023

Note : 1

· Capacity is based on the following temperature conditions.

		Condition		JIS C9612
	Temperature		Cooling	Heating
	Indoor unit inlet air temperature	(DB)	27°C	20°C
		(WB)	19°C	15°C
	Outdoor unit inlet air temperature	(DB)	35°C	7°C
		(WB)	24°C	6°C

- 4 -

FILE NO. SVM-07023

2. CONSTRUCTION VIEWS

2-1. Indoor Unit

Front panel	Air inlet	Air filter	Heat exchanger
		740	195

250

52

60

8

Air outlet

Knock out system

50				50
55	60		60	55
105		500	135

58

8

Knock out system

	Drain hose (0.5m)	290	Connecting pipe (0.37m)
			(Flare 6.35)

Hanger

Connecting pipe (0.37m) (Flare 9.52)

605

235

215

45

250

Hanger 90 135 145

235	For stud bold (	8~ 10)
215	For stud bold (	6)
Hanger	26
	45
	165		157
	40	56	19

	Hanger	38	Wireless remote control
145	135	90

Installation plate outline

Center line

– 5 –

FILE NO. SVM-07023

2.2. Outdoor Unit (RAS-10S2AH-E)

				A
				30	108	125
			600
		50	R15
		36
			320	86				320	306
320	306		Ø6 hole
			R5.5					Ø6 hole
										36	R15
								Ø11x14 hole
A detail Drawing (Back leg)										50
				Ø25 Drain outlet	2- Ø11 x 14		Hole
								B Detail Drawing (Front leg)
					(For Ø8 -Ø10 anchor bolt)

550

290

FAN-GUARD
Ø 436
275
90	600	90	69

COVER-PV

Z

321

342

		Electrical part cover
		Liquid side
		(Flare Ø6.35)
		Gas side
		(Flare Ø9.52)
129	84	5
		4

	Z View	Service port
	600	2 -R5-5x17L UShape (For Ø8Ø10 anchor bolt)
45 or more		Air intlel
		600 or more
320
100 or more	Air outlel	400 or more
		2-Ø11x14 Long holes(For Ø8 - Ø10 anchor bolt)

Installation dimension

− 6 −

FILE NO. SVM-07023

2-3. Outdoor Unit (RAS-07S2AH-E)

C

L

C

L

- 7 -

FILE NO. SVM-07023

3. WIRING DIAGRAM

RAS-10SKHP-E / RAS-10S2AH-E

RAS-07SKHP-E / RAS-07S2AH-E

	BLK
	P04
L	BRW
N	BLU
	GRN & YEL
	CN31
SINGLE PHASE
220-240V 50/60Hz

T02

C.T.

BLK

WHI

1 1

3 3

CN27 CN03

1 2

1 2

BLK

BLK

73 C x2

LOUVER

INFRARED RAYS RECEIVE

THERMAL FUSE

MOTOR

AND INDICATION PARTS

CN25 1

2

3

4

5

6

7

8

PINK

PINK

1

2

3

4

5

6

7

8

YEL YEL YEL YEL

WHI

BLU

BLU

BLU

BLU

BLU

BLU

BLU WHI

1 2

5 4 3 2 1

1 2 3 4

5 6

7 8

1 2 CN04

5 4 3 2 1

1 2 3 4

5 6 7 8 CN14

CN07

SG01

R22

DC5V

Micro

DSA

VARISTOR

Voltage

Power

Regulator

Module

DC12V

3

T6.3A 250VAC

R

1STO

C01

C02

R319

R2

+

RY01

ARI

V

C63

L01

DB01

4

IC35

BLK

MAIN P.C. BOARD

WP-015

RY03

RY04

C15

CR02

3

1

CN11

CN10 5

1

2 3

145 C

1 1

BLK

5

3

1

1 2 3

2 2

GRY

CN01

CR01

3 3

YEL

BRWRED

THERMO

1

2

HEAT EXCHANGER

4 4

1

2

5 5

SENSOR (TA)

SENSOR (TC)

6 6

WHI

BLK

BLK

AC FAN MOTOR

INDOOR		BLK	WHI	RED	BLU
TERMINAL		1	2	3	4
BLOCK						INDOOR
						OUTDOOR
OUTDOOR
TERMINAL						CHASSIS
BLOCK	BLK	1(L)	2(N)	3	4
			BLK	BLK
			SOLENOID COIL
OVER LOAD RELAY			RED	CAPACITOR
BLK		RED	RED		WHI BLK
COMPRESSOR				FAN
				MOTOR
	PNK		CAPACITOR
	WHI
						− 8 −

FILE NO. SVM-07023

4. SPECIFICATION OF ELECTRICAL PARTS

4-1. Indoor Unit (RAS-10SKHP-E, RAS-07SKHP-E)

No.

Parts name

Type

Specifications

1

Fan motor (for indoor)

AFS-220-20-4AR

AC Motor with 145 °C thermo fuse

2

Thermo sensor (TA-sensor)

10kW at 25°C

3

Micro power module (M01)

mRM1260V

4

Microcontroller unit (IC30)

TMP87CM40AFG-6P69

5

Heat exchanger sensor

10kW at 25 C

(TC-sensor)

°

6

Line filter (L01)

LC*SS11V-06270

27mH, 600mA

7

Bridge rectifier (DB01)

DB105G

1A, 600 V

8

Capacitor (C63)

EKMH401VSN470MP20S

47mF, 400 V

9

Fuse (F01)

BET6.3A

6.3A, 250VAC

10

Varistor (R21, R22)

TND15G-561KB0SLAA0

560 V

11

Resistor (R319)

RF-2TK5R6

5.6 W , 2 W

12

Louver motor

24BYJ48

12VDC

13

Relay (Comp., RY01)

G4A-1A-E-CA

Rating 20A/AC250 V, 12VDC

14

Relay (Fan, RY03)

G5NB-1A

Rating 3A/AC250 V, 12VDC

15

Relay (Solenoide, RY04)

G5NB-1A

Rating 3A/AC250 V, 12VDC

4-2. Outdoor Unit (RAS-10S2AH-E)

No.

Parts name

Type

Specifications

Output (Rated) 1000 W, 2 poles, 1 phase, 220 - 240 V, 50Hz

1

Compressor

PH180X1C-4DZDN3

Winding resistance (W)

C-R

C-S

(at 20°C)

3.33

3.78

Output (Rated) 20 W, 6 poles, 1 phase, 220 - 240 V, 50Hz

2

Fan motor (for outdoor)

SKF-240-20B

Winding resistance (W)

Red-Black

White-Black

(at 20°C

235.2

260.1

3

Running capacitor

DS451155NPQB

AC 450 V~, 1.5mF

(for fan motor)

4

Running capacitor

RS44B256U0214S

AC 440 V~, 30mF

(for compressor)

5

Overload relay

JMRA99269-9103

U/T : 7.3A (80°C), OPEN : 135±5°C, CLOSE : 69±11°C

- 9 -

FILE NO. SVM-07023

4-3. Outdoor Unit (RAS-07S2AH-E)

No.	Parts name	Type	Specifications
			Output (Rated) 605W, 2poles, 1 phase, 220 − 240V, 50Hz
1	Compressor	PH108X1C-4DZDN2	Winding resistance (Ω)		C-R	C-S
			(at 20°C)		4.84	4.40
			Output (Rated) 20W, 6poles, 1 phase, 220 − 240V, 50Hz
2	Fan motor (for outdoor)	SKF-240-20B	Winding resistance (Ω)		Red-Black	White-Black
			(at 20°C)		235.2	260.1
3	Running capacitor	DS451155NPQB	AC 450V~, 1.5mF
	(for fan motor)
4	Running capacitor	RS44B256U0213S	m
	(for compressor)		AC 440V~, 25 F
5	Overload relay	JMRA99208-9102	U/T: 4.2A (80°C), OPEN: 135±5°C, CLOSE: 69±11°C

- 10 -

FILE NO. SVM-07023

5. REFRIGERATION CYCLE DIAGRAM

5-1. RAS-10SKHP-E / RAS-10S2AH-E

			Indoor unit	T1
	Cooling		Heat exchanger
0.39 m		Heating		0.49 m
(Connecting pipe)				(Connecting pipe)
Æ9.52			Cross flow fan	Æ6.35
O.D.:9.52 mm		P		O.D.:6.35 mm
		Packed valve		Packed valve
		(Æ9.52)		(Æ6.35)
		Heating
Cooling		4-way valve

Heating	Cooling Compressor	PH150X1C-4DZDN3
		Capillary tube	Capillary tube
		Æ1.2 x 500l	Æ0.8 x 700l
	Accumulator
		Heat exchanger

			Refrigerant
	Propeller fan		R22 : 0.75 kg.
Cooling	Outdoor unit	Mark (	) means check points of Gas Leak.
Heating

		Standar d	Surface temp. of heat		Ambient temp.
				Fan speed	conditions DB/WB
	50Hz	pressure P	exchanger inter changing
				(indoor)		(°C)
		(MPaG)	pipe T1 (°C)
					Indoor		Outdoor
	Standard	1.59	41.0	High	20/15		7/6
Heating	Overload*1	2.14 ~ 2.36	50.0 ~ 58.0	Low	27/-		24/18
	Low temperature	1.30	32.0	High	20/-		-10/-10
	Standard	0.52	12.0	High	27/19		35/24
Cooling	Overload	0.62	16.0	High	32/23		43/26
	Low temperature	0.44	5.0	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.

- 11 -

FILE NO. SVM-07023

5-2. RAS-07SKHP-E / RAS-07S2AH-E

	Cooling
0.39m	Heating
(Connecting pipe)
9.52

T1

Indoor unit

Heat exchanger

Cross flow fan

0.49m (Connecting pipe)6.35

O.D.:9.52mm	P	O.D.:6.35mm
	Packed valve	Packed valve
	( 9.52)	( 6.35)
	Heating
Cooling	4-way valve

Heating Cooling Compressor PH108X1C-4DZDN2

Capillary tube1.0x1000S (2 pcs.)

Accumulator

Heat exchanger

				Refrigerant
	Propeller fan			R-22 : 0.64 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	1.32	35.0	High	20/–	7/6
Heating	Overload	1.93	50.0	Low	27/–	24/18
	Low temperature	1.14	30.0	High	20/–	–10/–10
	Standard	0.52	13.0	High	27/19	35/24
Cooling	Overload	0.68	18.0	High	32/23	43/26
	Low temperature	0.32	7.0	Low	21/15	21/15

Note :

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

– 12 –

FILE NO. SVM-07023

6. CONTROL BLOCK DIAGRAM

RAS-10SKHP-E / RAS-10S2AH-E, RAS-07SKHP-E / RAS-07S2AH-E

Heat Exchange sensor

Thermo. Sensor

Current Sensor

(Compressor Current)

Infrared Rays Signal Reciver

Main Unit Control Panel

M.C.U.

Functions

Operation

Display

∙ Louver Control

Timer

Display

∙ 3-minutes Delay at Restart

for Compressor

∙ Motor Revolution Control

Initiallizing Circuit

Clock Frequency

∙ Processing

Oscillator Circuit

Indoor Fan

(Temperature Processing)

∙ Timer

Motor

Power Supply

Compressor

Outdoor Fan

4-Way Valve

Louver

Circuit

ON/OFF

ON/OFF

ON/OFF

ON/OFF

Signal

Signal

Signal

Signal

Louver

Noise Filter

Relay Driver, Louver Driver

Motor

Relay

Relay

Relay

RY01

RY03

RY04

	220-240 V~, 50Hz	Compressor Outdoor Fan Motor 4-Way Valve
	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

− 13 −

108

119

2012

FILE NO. SVM-07023

7. OPERATION DESCRIPTION

7-1. Remote control

1

7-1-1. Function of Push Putton

1Infrared signal emitter

2Start/Stop button

3Mode select button (MODE)

4Temperature button (TEMP)

5Fan speed button (FAN)

6Swing louver button (SWING)

7Set louver button (FIX)

8On timer button (ON)

9Off timer button (OFF)

Sleep timer button (SLEEP)

Timer setup button (SET)

Timer clear button (CLR)

13Memory and Preset button (PRESET)

14One Touch button (ONE-TOUCH)

15High power button (Hi-POWER)

16Economy button (ECO)

17Quiet button (QUIET)

18Comfort sleep button (COMFORT SLEEP)

19Filter reset button (FILTER)

20Clock Reset button (CLOCK)

21Check button (CHK)

TOSHIBA

13	PRESET		FAN	5
			TEMP
	ONE-TOUCH		MODE	4
14				3
2			COMFORT	18
	QUIET		SLEEP
17				15
	SWING	FIX	Hi-POWER ECO
6				16
7	TIMER		CLR	12
8
		ON	OFF	9
10	SLEEP		SET	11
21
	CHK		FILTER CLOCK	20
19

− 14 −

FILE NO. SVM-07023

7-1-2. Display of Remote Control

All indications, except for the clock time indicator, are displayed by pressing the button.

1. Transmission mark

5. TIMER and clock time indicator

This transmission mark indicates when the remote controller transmits signals to the indoor unit.

2. Mode indicator

Indicates the current operation mode.

(AUTO : Automatic control, A : Auto changeover control, : Cool, : Dry, : Heat,: Fan only)

3. Temperature indicator

Indicates the temperature setting. (17°C to 30°C)

4. FAN speed indicator

Indicates the selected fan speed.

AUTO or five fan speed levels

(LOW , LOW+ , MED , MED+ ,

HIGH	) can be shown.

Indicates AUTO when the operating mode is either AUTO or : Dry.

The time setting for timer operation or the clock time is indicated.

The current time is always indicated except during TIMER operation.

6. Hi-POWER indicator

Indicates when the Hi-POWER operation starts.

Press the Hi-POWER button to start and press it again to stop the operation.

7. (PRESET) indicator

Flashes for 3 seconds when the PRESET button is pressed during operation.

The mark is shown when holding down the button for more than 3 seconds while the mark is flashing.

Press another button to turn off the mark.

8. ECO indicator

Indicates when the ECO is in activated.

Press the ECO button to start and press it again to stop operation.

9. A, B change indicator remote controller

				When the remote controller switching function is
				set, “B” appears in the remote controller display.
				(When the remote controller setting is “A”, there is
				no indication at this position.)
				10. Comfort sleep
				Indicates when comfort sleep is activaled.
				Press comfort sleep button to selectter
9				11. Quiet
				Indicates when quiet is activated.
	15	2
1			13	Press quiet button to start and press it again to stop
				operation.
10
				12. One-Touch
				Indicates when one touch comfort is activated.
				Press one-touch button to start the operation.
				13. Swing
				Indicates when louver is swing.
				Press swing button to start the swing operation
11				and press it again to stop the swing operation.

			8						5
6						4
3					7

− 15 −

Operations according to the commands from the indoor unit

FILE NO. SVM-07023

7-2. 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 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 measurement 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 indoor heat exchanger and control for the four-way valve and the outdoor fan motor) *Heat pump Model only

7-2-1. 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.

7-2-2. Indoor Fan Control

The operation controls the fan speed at indoor unit

side. The indoor fan (cross flow fan) is operated by the phase control induction motor. The fan rotates in 5

stages in MANUAL model, and in 5 stages in AUTO mode, respectively. (Table 7-2-1)

1)When setting the fan speed to L, L+, M, M+ or H on the remote controller, the operation is performed with the constant speed shown in Fig. 7-2-1 and

Fig 7-2-2

Fig (7-2-1) Cooling
Indication		Fan speed
L		W6
L+		(L + M) / 2
M		W9
M+		(M + H) / 2
H		WC

Fig (7-2-2) Heating
Indication		Fan speed
L		W8
L+		(L + M) / 2
M		WA
M+		(M + H) / 2
H		WE

Table 7-2-1 Indoor fan and air flow rate

		Fan speed level
	OPERATION	Cool
	MODE	Heat
		Dry
Model	RAS-07SKHP-E	fan speed (rpm)
		fan speed (rpm)
		Air flow (m3/h)
	RAS-10SKHP-E
		Air flow (m3/h)

2)When setting the fan speed to AUTO on the remote controller, revolution of the fan motor is controlled to the fan speed level shown in Table 1 according to the setup temperature, room temperature, and heat exchanger temperature.

WF WE		WD WC WB WA				W9	W8	W7	W6	W5	W4	W3	W2	W1
		UH	H	M+		M		L+	L	L-	UL	SUL
UH	H	M+		M+		L+	L	L-		UL			SUL
		UH	H	M+	M			L+	L	L-	UL	SUL
1300	1300 1300		1300	1250 1150		1100	950	950	900	800	750	700	650	500
540	540	540	540	510	470	440	370	370	350	300	270	250	220	150
1350	1350 1350		1300	1250 1180		1140	1000	980	980	900	800	750	700	550
560	560	560	540	510	500	460	400	390	390	350	300	270	250	180

− 16 −

7-3. Description of Operation Mode

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

(2)When pressing [] button on the

remote control, receiving beep sounds from the indoor unit, and the next operation is performed together with opening the vertical air flow louver.

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

[] button.

7-3-1. 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. 7-3-3. When [FAN] button is set to LOW, LOW+, MED, MED+ or HIGH, the motor operates with a constant air flow.

	temp.)		° C
		+3
	−(Preset			M+
		+2
		+2.5		*1
	temp.)	+1.5		*2
				*3
	(Room	+0.5
	Preset	+1
			0
	temp.
			(Preset temp.: 24 °C)

NOTE1 : *1 : Fan speed = (M + − L) x 3/4 + L *2 : Fan speed = (M + − L) x 2/4 + L *3 : Fan speed = (M + −L) x 1/4 + L

(Linear approximation from M+ and L)

NOTE2 : The Hi Power, ECO and COMFORT SLEEP operation can not be set

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

FILE NO. SVM-07023

7-3-2. Cooling operation

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

(1)The compressor, 4-way valve, outdoor fan and operation display lamp are controlled as shown in Fig. 7-3-4.

(Presettemp.)	0.5
	° C
(Room temp.)
Preset		0
temp.

ON ON

OFF OFF OFF ON

Compressor	way-4valve	Outdoorfan	OPERATION
			displaylamp

Fig. 7-3-4

(2)When [FAN] button is set to AUTO, the indoor fan motor operates as shown in Fig. 7-3-5. When [FAN] button is set to LOW, LOW+, MED, MED+ or HIGH, the motor operates with a constant air flow.

	temp.)		° C
		+3
	(Preset		M+
		+2.5
		*1
	−	+2
		*2
	temp.)
		+1.5
		*3
	(Room	+1
		+0.5
	Preset		0
	temp.	-0.5

NOTE1 : *1 : Fan speed = (M + − L) x 3/4 + L *2 : Fan speed = (M + − L) x 2/4 + L *3 : Fan speed = (M + −L) x 1/4 + L

(Linear approximation from M+ and L)

Fig. 7-3-5 Setting of air flow [FAN:AUTO]

− 17 −

7-3-3. Dry operation

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

(1)The compressor, 4-way valve, outdoor fan and operation display lamp are controlled as shown in Fig. 7-3-6.

FILE NO. SVM-07023

7-3-4. Heating operation

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

(1)The compressor, 4-way valve, outdoor fan and operation display lamp are controlled as shown in Fig. 7-3-8.

	temp.)	° C
	(Preset	+3
	temp.)
		+2
	(Room
		+1
	Preset		0
	temp.

OFF:5min. OFF:4min.

ON:5min. ON:6min.

OFF

Compressor

OFF

4-way valve

OFF:5min. OFF:4min.

ON:5min. ON:6min.

OFF

Outdoor fan

ON

OPERATION display lamp

° C

Preset 0 temp.

temp.)(Preset 0.5 temp.)(Room

OFF ON OFF ON

ON		ON
Compressor	way-4valve	Outdoorfan OPERATION
		displaylamp

Fig. 7-3-6

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

The pattern of operation depending on the relation between room temperature and preset temperatures is shown in Fig. 7-3-7.

Room temp.

Preset temp.+1

Preset temp.

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

Fig. 7-3-7

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

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

Fig. 7-3-8

(2)When [FAN] button is set to AUTO, the indoor fan motor operates as shown in Fig. 7-3-9. When [FAN] button is set to LOW, LOW+, MED, MED+ or HIGH, the motor operates with a constant air flow.

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

*1 : Fan speed = (M + −L) x 1/4 + L *2 : Fan speed = (M + − L) x 2/4 + L *3 : Fan speed = (M + −L) x 3/4 + L

(Calculated with inear approximation from M+ and L+)

Fig. 7-3-9

− 18 −

(3)The indoor heat exchanger restricts revolving speed of the fan motor to prevent a cold draft. The upper limit of the revolving speed is shown in

Fig. 7-3-10 and Table 7-3-2.

	Tc
46	46	34		H (WE)
45	45	33
				Line-approximate
33	33	21		H and SUL with Tc.
32	32	20
*A+4	*A+4	*A+4
				SUL (W2)
*A-4	*A-4	*A-4		Stop
			Fan speed MANUAL in starting
			Fan speed AUTO in stability
			Fan speed AUTO in starting

*No limitation while fan speed MANUAL mode is in stability.

*A: When Tsc ≥ 24, A is 24, and when Tsc < 24, A is Tsc Tsc: Set value

Fig. 7-3-10 Cold draft preventing control

Table 7-3-2

Fan	*5	*6
speed	Starting period	Stabilized period
AUTO	• Up until 12 minutes	• From 12 to 25 minutes
	passed after starting	passed after starting
	the unit	the unit and room
	• From 12 to 25 minutes	temperature is
	passed after starting	between preset
	the unit and room	temperature and 3°C
	temperature is 3°C	lower than preset
	lower than preset	temperature
	temperature	• 25 minutes or more
		passed after starting
		the unit
Manual	• Room temperature	• Room temperature
(L – H)	< Preset temperature	Preset temperature
	–4°C	–3.5°C

FILE NO. SVM-07023

7-3-5. Automatic operation

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

(1)One of 3 operations (Cooling, Fan only or Heating) is selected according to difference between the preset temperature and the room temperature at which the automatic operation has started, as shown in Fig. 7-3-11. The Fan only operation continues until the room temperature reaches a level at which another mode is selected.

(2)Temporary Auto

When the RESET button on the indoor unit

is pushed, the preset temperature is fixed at 24°C and the indoor unit is controlled as shown in

Fig. 7-3-11.

°C

	temp.)		Cooling operation
	−(Preset	0
			Fan only operation
	temp.)	-1
			Heating operation
	(Room
			Fig. 7-3-11

−19 −

7-4. High-Temperature Limit Control

The microcontroller detects the indoor heat exchanger temperature to prevent pressure of a refrigerating cycle from increasing excessively.

The compressor and outdoor fan motor are controlled as shown in Fig. 7-4-1.

FILE NO. SVM-07023

7-6. Defrost Operation

During the heating operation, the outdoor heat exchanger temperature goes down and sometimes it is frozen.

In this case, the air conditioner stops the heating operation and starts the defrost operation to melt ice.

	Compressor	Outdoor fan	Heat exchanger
			temp.

	OFF	OFF	(°C)
			60
	ON	OFF	53
	ON	ON	52

Fig. 7-4-1

7-5. Low-Temperature Limit Control

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

The compressor and outdoor fan motor are controlled as shown in Fig. 7-5-1 and 7-5-2.

7-6-1. Condition to start the defrost operation

The defrost operation starts whichever below conditions are satisfied.

(1)When the cumulative compressor operating time is longer than 40 or 90 minutes and difference between the indoor heat exchanger temperature and the room temperature is less than the specified value. (This value is decided by the microprocessor.) (Control example is shown in Fig. 7-6-1. In case of B or C, the defrost operation starts.)

(2)When the current limit control or the high temperature limit control is performed for total of 90 minutes.

RAS-07SKHP-E

RAS-10SKHP-E

	Heat exchanger
	temperature	Compressor Outdoor fan
	(°C)	ON
	5
		Less than 2°C continues
	2	for 5 minutes
		OFF

Fig. 7-5-1

temp		D
Indoorheat exchanger Roomtemp	A	B	Cumulative
		C	compressor
			operating time

Fig. 7-6-1 (Indoor fan speed : M)

7-6-2. Defrost operation time control <In case of B>

(1)The heating operation is performed for at least 40 minutes.

(2)The maximum defrost operating time is 6 minutes. The defrost operating time for the 4th cycle is

10 minutes. (When the outdoor temperature is very low, however, the defrost operating time is

10 minutes.)

− 20 −

FILE NO. SVM-07023

minutes
40
Heating	Defrost

minutes
40
Heating	Defrost

minutes
40
Heating	Defrost

minutes
40
Heating	Defrost

Max 6 minutes 10 minutes

1 cycle

Fig. 7-6-2

<In case of C>

(1)The heating operation is performed for at least 90 minutes.

(2)The defrost operating time is 10 minutes.

7-6-3. Ending condition at defrost operation

(1)When the compressor current becomes 8.0A or more during defrost operation, the defrost operation stops and the heating operation restarts. (The current sensor detects the compressor current.)

(2)The defrost operation continues for at most 6 minutes or 10 minutes.

DEFROST LAMP :

·During defrost operation, the PRE-DEF. lamp is on and the indoor and outdoor fans are off.

·The compressor start protection timer is interlooked with the PRE-DEF. lamp. So the PRE-DEF. Lamp is off (the fans stop) for about 3 minutes after the [ START ] button is turned on. When the compressor is turned on, the PRE-DEF. lamp comes on. After the heat ex-changer is preheated to about 24°C or higher, the PRE-DEF. Lamp goes off, and the indoor fan starts.

− 21 −