Toshiba RAS-13S2AH-ES, RAS-13SKHP-ES SERVICE MANUAL

FILE NO. SVM-09030

SERVICE MANUAL

AIR CONDITIONER

SPLIT WALL TYPE

RAS-13SKHP-ES / RAS-13S2AH-ES

January, 2009

FILE NO. SVM-09030

CONTENTS

1.SPECIFICATIONS

2.CONSTRUCTION VIEWS

2-1 Indoor Unit

2-2 Outdoor Unit

3.WIRING DIAGRAM

4.SPECIFICATION OF ELECTRICAL PARTS

5.REFRIGERATION CYCLE DIAGRAM

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 Drescription of Safety and Reliability Prevention Function 7-5 One-Touch Operation

7-6 Hi POWER Operation

7-7 QUIET Operation

7-8 ECO Operation

7-9 COMFORT SLEEP Operation

7-10 FILTER Check lamp

7-11 Auto Restart Function

7-12 Self-Cleaning Operation

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 (Including the Indoor P.C. Board)

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

- 1 -

1. SPECIFICATIONS

FILE NO. SVM-09030

MODEL

RAS-13SKHP-ES / RAS-13S2AH-ES

ITEM

Cooling

Heating

Capacity

220 V

240 V

220 V

240 V

kW

3.75

3.82

4.20

4.26

Phase

1Æ

Power source

V

220 - 240

Hz

50

Power consumption

kW

1.15

1.19

1.14

1.18

Power factor

%

98

96

97

95

Running

Indoor

A

0.15

current

Outdoor

A

5.20

5.00

5.20

5.00

Starting current

A

29

Moisture removal

lit/h

2.0

Noise

Indoor (H/M/L)

dB

41/38/35/33/31

Outdoor (220 - 240 V) dB

50

51

50

51

Refrigerant

Name of refrigerant

R410A

Rated amount

kg

0.95

Refrigerant control

Capillary tube

Gas side size

mm

Æ12.7

Connection type

Flare connection

Liquid side size

mm

Æ6.35

Interconnection

Connection type

Flare connection

pipe

Maximum length

m

15*1

(One way)

Maximum height

m

6

difference

INDOOR UNIT

RAS-13SKHP-ES

Height

mm

275

Dimensions

Width

mm

790

Depth

mm

205

Net weight

kg

9

Evaporator type

Finned tube

Indoor fan type

Cross flow fan

High fan

m3/h

620

650

Air-flow volume Medium fan

m3/h

520

550

Low fan

m3/h

430

450

Fan motor output

W

20

Air filter

Honeycomb woven filter with PP frame

OUTDOOR UNIT

RAS-13S2AH-ES

Height

mm

550

Dimensions

Width

mm

780

Depth

mm

290

Net weight

kg

38

Condenser type

Finned tube

Outdoor fan type

Propeller fan

Air-flow volume

m3/h

2120

2200

2120

2200

Fan motor output

W

42

Compressor

Model

PA150X2C-4FT

Output

W

1100

Safety device

Fuse, Overload relay

Louver type

Automatic louver

Usable outdoor temperature range

°C

15 ~ 43

-10 ~ 24

− 2 −

FILE NO. SVM-09030

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
	Note : 2

*1 No need to charge extra refrigerant.

- 3 -

FILE NO. SVM-09030

2. CONSTRUCTION VIEWS

2-1. Indoor Unit

790

Front panel

63

7

Air filter

Air inlet

	275
48	Heat exchanger

205

63

48

7

Knock out system

49

62 69

116

480

193

Installation plate hanger

Installation plate hanger			Drain hose (0.50m)
Connecting pipe (0.35m)			Connecting pipe (0.40m)
(Flare	12.7mm)		(Flare 6.35mm)
84.5	621		84.5
	235	235
	215	215	moreor
		distance
	Hanger	Minimum
		to ceiling	65

	Minimum						45
						Minimum
	distance
						distance
	to wall
275						to wall	190
	170 or more					170 or more
	40						40
		Hanger			Hanger
	84.5	150	160.5	160.5	150	84.5
			Center line		Installation plate outline

Knock out system

	157
56	19

Wireless remote controller

	125
63	26

Remote controller holder

- 4 -

								FILE NO. SVM-09030
	2.2. Outdoor Unit
				A
				28	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

320

342

COVER-PV

Z

		Electrical part cover
		Liquid side
		(Flare Ø6.35)
		Gas side
		(Flare Ø12.7)
129	84	5
		4

	Z View	Service port
	600
100 or more		Air intlel
		600 or more
321
100 or more	Air outlel	600 or more
		4x Ø11 Long holes(For Ø8Ø10 anchor bolt)

− 5 −

FILE NO. SVM-09030

3. WIRING DIAGRAM

	INDOOR
OUTDOOR	OUTDOOR
TERMINAL
BLOCK	CHASSIS

BLK	1(L)	2(N)	3	4
		BLU	BLU
		SOLENOID COIL
BLK	RED	RED	CAPACITOR
				WHI	BLK
		RED
COMPRESSOR			FAN
			MOTOR
PNK		CAPACITOR
WHI

− 6 −

FILE NO. SVM-09030

4. SPECIFICATION OF ELECTRICAL PARTS

4-1. Indoor Unit

No.	Parts name	Type	Specifications
1	Fan motor (for indoor)	AFN-220-20-4D	AC Motor with 145 ° C thermo fuse
2	Thermo sensor (TA-sensor)		10kW at 25°C
3	Micro Power Module (M01)	μRM1260V	DC 390V, Secondary DC 12V
4	Microcontroller unit (IC30)	TMP87CM40ANG
5	Heat exchanger sensor		10kW at 25 C
	(TC-sensor)		°
6	Line filter (L01)	LC*SS11V-R06270	27mH, 600mA
7	Bridge rectifier (DB01)	DB105G	1A, 600 V
8	Capacitor (C03)	EKMH401VSN470MP20S	47mF, 400 V
9	Fuse (F01)	BET 6.3A	T6.3A, 250VAC
10	Varistor (R06, R07)	SR561K14DL	560 V
11	Resistor (R01 )	RF-2TK5R6	5.6 W , 2 W
12	Louver motor	MP24Z3T	12VDC
13	Relay (Comp., RY01)	G4A-1A	Rating 25A/AC250 V, 3-48VDC
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
	No.	Parts name	Type	Specifications
				Output (Rated) 1100W, 2poles, 1 phase, 220 − 240V, 50Hz
	1	Compressor
			PA150X2C-4FT	Winding resistance (Ω)	C-R	C-S
				(at 20°C)
					2.35	3.22
		Fan motor		Output (Rated) 42W, 6poles, 1 phase, 220 − 240V, 50Hz
	2		WLF-240-42A	Winding resistance (Ω)	Red-Black	White-Black
		(for outdoor)
				(at 20°C)	188	289
	3	Running capacitor	DS451155NPQB	AC 450V, 1.5μF
		(for fan motor)
	4	Running capacitor	B32332I5306J063	AC 450V, 30μF
		(for compressor)
		Solenoid coil
	5	(for 4-way valve)	STF-01AJ503H1	AC 220 − 240V, 50Hz
		(for Heat pump
		model)

- 7 -

FILE NO. SVM-09030

5. REFRIGERATION CYCLE DIAGRAM

			Indoor unit	T1
	Cooling		Heat exchanger
0.39 m		Heating		0.49 m
(Connecting pipe)				(Connecting pipe)
Æ12.7			Cross flow fan	Æ6.35
O.D.:12.7 mm		P		O.D.:6.35 mm
		Packed valve		Packed valve
		(Æ12.7)		(Æ6.35)
		Heating
Cooling		4-way valve

Heating	Cooling Compressor	PA150X2C-4FT
			Capillary tube	Capillary tube
				Æ1.2 x 800 l
	Accumulator		Æ1.5 x 1100 l
		Heat exchanger

			Refrigerant
	Propeller fan		R410A : 0.95 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	2.66	44.8	High	20/15		7/6
Heating	Overload*1	2.85~3.36	45.9~53.2	Low	27/-		24/18
	Low temperature	2.65	43.9	High	20/-		-10/-10
	Standard	1.03	10.9	High	27/19		35/24
Cooling	Overload	1.16	14.4	High	32/23		43/26
	Low temperature	0.78	2.5	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.

- 8 -

FILE NO. SVM-09030

6. CONTROL BLOCK DIAGRAM

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

Filter Sign

Display

for Compressor

Hi Power

Sign Display

Initiallizing Circuit

∙ Motor Revolution Control

PRE DEF.

Sign Display

Clock Frequency

∙ Processing

Oscillator Circuit

Indoor Fan

(Temperature Processing)

∙ Timer

Motor

Compressor

Outdoor Fan

4-Way Valve

Power Supply

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 ()

Operation Mode Selection

AUTO, COOL, DRY, HEAT, FAN ONLY

Temperature Setting

Fan Speed Selection

ON TIMER Setting

OFF TIMER Setting

Louver Auto Swing

Louver Direction Setting

ECO

Hi power

TIMER 1.3.5.9H

COMFORT SLEEP

QUIET

− 9 −

108

119

2012

FILE NO. SVM-09030

7. OPERATION DESCRIPTION

7-1. Remote control

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)

1

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

− 10 −

FILE NO. SVM-09030

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.

(A : Auto, : 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.

Indicate Auto will be appear with Dry operation ( : Dry) only.

9					12				2			13
1
10

11

		8						5
6					4
3				7

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 blinks.

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

11. Quiet

Indicates when quiet is activated.

Press quiet button to start and press it again to stop operation.

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 and press it again to stop the swing operation.

- 11 -

Operations according to the commands from the indoor unit

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.

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

FILE NO. SVM-09030

∙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, control the four-way valve and outdoor fan motor control)

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 [SWING] 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 mode, and in 5 stages in AUTO mode, respectively. (Table 7-2-3)

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 Table 7-2-1 and Table 7-2-2

Table (7-2-1) Cooling

Indication	Fan speed
L	Low
L+	(L + M) / 2
M	Med
M+	(M + H) / 2
H	High

Table (7-2-2) Heating

Indication	Fan speed
L	Low
L+	(L + M) / 2
M	Med
M+	(M + H) / 2
H	High

2)When setting the fan speed to AUTO on the remote controller, revolution of the fan motor is controlled to the fan speed level show in Table 7-2-3

according to the setup temperature, room temperature, and heat exchanger temperature.

Table 7-2-3 Indoor fan and air flow rate

Model

								FAN TAP
	Cooling			UH	H		M			L	L-	UL	SL
OPERATION	Fan only				H		M			L	L-
MODE	Dry						M			L	L-	UL		SL
	Heat	UH	H			M		L	L-		UL					SL
	rpm				1300	1150	1100			900	850	750	650	550
RAS-13SKHP-ES		1350						950	900							500
	Air flow volume (m3/h)	650			620	550	520	450	430	430	400	350	310	260		240

- 12 -

FILE NO. SVM-09030

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

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. 7-3-2.

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

ON ON

OFF OFF OFF ON

Compressor	way-4valve	Outdoorfan	OPERATION
			displaylamp

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

NOTE 1 : *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

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

(Linear approximation from M+ and L)

Fig. 7-3-1 Setting of air flow [FAN:AUTO]

Fig. 7-3-2

(2)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
	−	*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. 7-3-3 Setting of air flow [FAN:AUTO]

- 13 -

FILE NO. SVM-09030

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. 7-3-4.

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. 7-3-6.

	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. 7-3-4

(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. 7-3-5.

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. 7-3-5

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

(4)The ECO, COMFORT SLEEP, QUIET and

Hi POWER operations can not be set.

Fig. 7-3-6

(2)When [FAN] button is set to AUTO, the indoor fan motor operates as shown in Fig. 7-3-7. 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
		-1.5
				*2
		-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 Linear approximation from M+ and L+)

Fig. 7-3-7

- 14 -

FILE NO. SVM-09030

(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. 7-3-8

	Tc
46	34
45	33
33	21
32	20
*A+0	*A+0
*A-8	*A-8

Fan speed AUTO		Fan speed MANUAL
		L-H (Up to
Normal AUTO		setting speed)
Line-approximate		Line-approximate
H and SL with Tc.		H and SL with Tc.
SL		SL
Stop		Stop

Fan speed MANUAL or AUTO in starting

Fan speed AUTO in stability

*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

[In starting and in stability]

		In starting		In stability
FAN	•	Until 12 minutes	• When 12 to 25 minutes
AUTO		passed after operation		passed after opeartion
		start		start and room temp.
	• When 12 to 25 minutes			is than (set 3°C )
		passed after operation		between preset
		start and room temp.	•	When 25 minutes or
		is 3°C or lower than		more passed after
		set temp.		operation start
FAN	•	Room temp. < Set	•	Room temp. Set
Manual		temp.–4°C		temp. –3.5°C

Fig. 7-3-8 Cold draft preventing control

(4)In order to prevent cold draft when compressor during heating operation.Then louver will move to upper position and fan speed will reduce or OF F .

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. 7-3-9. 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. 7-3-9.

°C

	temp.)		Cooling operation
	−(Preset	0
			Fan only operation
	temp.)	-1
			Heating operation
	(Room
			Fig. 7-3-9

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FILE NO. SVM-09030

7-4. Drescription of Safety and Reliability Prevention Function

7-4-1. 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. 7-4-1.

	Heat exchanger
	temperature	Compressor Outdoor fan
	(°C)	ON
	6
		Less than 2°C continues
	2	for 5 minutes
		OFF

Fig. 7-4-1

7-4-2 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. 7-4-2.

	Compressor	Outdoor fan	Heat exchanger
			temp.

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

7-4-3. 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.

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. 7-4-3. 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.

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

Fig. 7-4-3 (Indoor fan speed : M)

Fig. 7-4-2

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FILE NO. SVM-09030

Defrost operation time control

<In case of B>

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

<In case of C>

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

(2)The maximum defrost operating time is 6 minutes. (2) The defrost operating time is 10 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.)

minutes		minutes		minutes		minutes
40		40		40		40
Heating	Defrost	Heating	Defrost	Heating	Defrost	Heating	Defrost

Max 6 minutes 10 minutes

1 cycle

Fig. 7-4-4

Ending condition at defrost operation

(1)When the compressor current becomes 5.40A 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 [ ] 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.

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FILE NO. SVM-09030

7-4-4. Current Limit Control

The microcontroller detects the input current so as to prevent it exceeds a specified value by means of controlling the outdoor fan control as described in (1) and (2).

(1)Current limit control (Cooling operation)

Control is performed as shown below by detecting the compressor operating current with a current sensor (C.T).

Input current

	Compressor	Outdoor fan
	More than I4 continues for 3 seconds
11.0A	I4	OFF
	More than I3 continues for 5 minutes
10.0A	I3	OFF
		ON
	Fig. 7-4-5

(2) Current limit control (Heating operation)

Control is performed as shown in Fig. 7-4-6

		Input current
			Compressor	Outdoor fan
			More than I4 continues for 3 seconds
	11.0A	I4		OFF
			More than I3 continues for 5 minutes
	10.0A	I3		OFF
	6.45A	I2	ON	OFF

5.40A I1

ON

Fig. 7-4-6

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FILE NO. SVM-09030

7-5. One-Touch Operation

One touch comfort is the fully automated operation that is set according to the preferable condition in a region.

Fan
Operation	AUTO	*AUTO/L		L
	0	12	25	Time after operation
				starts (min)

*AUTO/L : Fan operates depends on the setting temperature and room temperature.

During the One Touch Comfort mode if the indoor unit receives any signal with other operation mode, the unit will cancel the comfort mode and operates according to the signal received.

Operation description

When an indoor unit receives "One Touch Comfort Signal" from the remote controller, the indoor unit operates as following.

1)Air conditioner starts to operation when the signal is received, even if the air conditioner was OFF.

2)Operation mode is set according to room temperature, the same as AUTO mode.

3)Target temperature is 24ºC.

4)Louver position is set as stored position.

5)Fan is controlled as diagrom.

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FILE NO. SVM-09030

7-6. Hi POWER Operation

([Hi POWER] button on the remote control is pressed.)

When [Hi POWER] button is pressed while the indoor unit is in Auto, Cooling or Heating operation, Hi POWER mark is indicated on the display of the remote control and the unit operates as follows.

(1)Automatic operation

·The indoor unit operates in according to the current operation.

7-7. QUIET Operation

When the [QUIET] button is pressed, the fan of the indoor unit will be restricted the revolving speed at speed L− until the [QUIET] button is pressed once again (cancel Quiet mode).

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

Remarks :

(2) Cooling operation

• The setting temperature drops 3°C.

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

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

• FAN speed : [AUTO]

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

• FAN speed : One of 5 levels

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

· The indoor unit's fan speed level increase 1 tap

(3) Heating operation

·

The preset temperature increases 2°C, (The value of the preset temperature on the remote control does not change.)

·The indoor unit operates in normal heating mode except the preset temperature is higher (+2°C).

·The indoor unit's fan speed level increase 1 tap

(4)The Hi POWER mode can not be set in Dry or Fan only operation.

(5) The Hi POWER mode can memorize with timer

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

2. Quiet mode is appropriate to work with less cooling load and less heating load condition. Because of the fan speed L− may cause not enough the cooling capacity or heating capacity.

7-8. ECO Operation.

Cooling operation

·The preset temperature will increase 1ºC after the

ECO mode has operated for 1 hour and the temperature will increase another 1ºC after the ECO mode has operated for 2 hour. (the value of the preset temperature on the remote control does not change.)

·The indoor fan speed is depend on presetting and can change every speed after setting ECO operation.

Heating operation

·The preset temperature will drop down 1ºC after the ECO mode has operated for 1 hour and the temperature will drop down another 1ºC after the ECO mode has operated for 2 hour. (the value of the preset temperature on the remote control does not change.)

·The indoor fan speed is depend on presetting and can change every speed after setting ECO operation.

7-9. COMFORT SLEEP Operation

Cooling operation

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

·Press the [COMFORT SLEEP] button to select this function. The comfort sleep function will be activate togetther with Auto shut down function. Period of operation time can be select by re-press the

[COMFORT SLEEP] button. The period of operation time are follows.

function.		1H		3H		5H		9H

Cancel

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