Toshiba RAS-24S2AH-ES2, RAS-24SA-ES2, RAS-24SKHP-ES2, RAS-24SKP-ES2 SERVICE MANUAL

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Page 1

SERVICE MANUAL

AIR CONDITIONER

RAS-24SKP-ES2 / RAS-24SA-ES2

RAS-24SKHP-ES2 / RAS-24S2AH-ES2

FILE NO. SVM-10049

SPLIT WALL TYPE

April, 2010

Page 2

CONTENTS

1. SPECIFICATIONS

2. CONSTRUCTION VIEWS

2-1 Indoor Unit 2-2 Outdoor Unit

3. WIRING DIAGRAM

3-1 RAS-24SKP-ES2 / RAS-24SA-ES2 3-2 RAS-24SKHP-ES2 / RAS-24S2AH-ES2

4. SPECIFICATION OF ELECTRICAL PARTS

4-1 Indoor Unit (RAS-24SKP-ES2)

Outdoor Unit (RAS-24SA-ES2)

4-2 4-3

Indoor Unit (RASP-24SKHP-ES2) Outdoor Unit (RAS-24S2AH-ES2)

4-4

5. REFRIGERATION CYCLE DIAGRAM

FILE NO. SVM-10049

RAS-24SKP-ES2 / RAS-24SA-ES2

5-1

RAS-24SKHP-ES2 / RAS-24S2AH-ES2

5-2

6. CONTROL BLOCK DIAGRAM

6-1 RAS-24SKP-ES / RAS-24SA-ES2

6-2 RAS-24SKHP-ES2 / RAS-24S2AH-ES2

7. OPERATION DESCRIPTION

7-1 Remote control 7-2 Outline of Air Conditioner Control

7-3 Description of Operation Circuit 7-4 Description 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

– 1 –

Page 3

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 Test Operation

9. TROUBLESHOOTING CHART

9-1 Troubleshooting Procedure 9-2 Basic Check Items 9-3 Primary Judgement 9-4 Self-Diagnosis by Remote Control (Check Code)

9-5 How To Diagnose Faulty Parts

Troubleshooting for Indoor unit

9-6 9-7 Troubleshooting for Wiring (Interconnect cable and Serial Signal Wire) 9-8 Troubleshooting for P.C. Board 9-9 Troubleshooting for Remote Control

FILE NO. SVM-10049

HOW TO REPLACE THE MAIN PARTS

10.

10-1 Indoor Unit

Outdoor Unit

10-2

11. EXPLODED VIEWS AND PARTS LIST

11-1 Indoor Unit (E - Parts Assy) 11-2 Indoor Unit 11-3

Outdoor Unit (RAS-24SA-ES2)

11-4

Outdoor Unit (RAS-24S2AH-ES2)

− 2 −

Page 4

1. SPECIFICATIONS

MODEL RAS-24SKP-ES2

Cooling

ITEM

Capacity

Phase

Power source

Hz Power consumption W Power factor % Running A Current Indoor/Outdoor Starting current A Moisture removal lit/h Noise Indoor (H/M+/M/L+/L) dB

Outdoor (220-240V) dB

Refrigerant Name of refrigerant

Rated amount kg Refrigerant control Interconnection Gas side size mm pipe Connection type

Liquid side size mm

Connection type

Maximum length m

(One way)

Maximum height m

difference

INDOOR UNIT

Dimensions Height mm

Width mm

Depth mm Net weight kg Evaporator type Indoor fan type Airflow volume High fan

Medium fan

Low fan

m Fan motor output W Air filter

OUTDOOR UNIT

Dimensions Height mm

Width mm

Depth mm Net weight kg Condenser type Outdoor fan type Airflow volume

m Fan motor output W Compressor Model

Output W Safety device Louver type Usable outdoor temperature range °C

Note *1 Chargeless pipe

*2 Maximum pipe

/h /h /h

220V

6.80

2030

0.3/9.1 0.3/8.6

Honeycomb woven filter with PP frame

4000

FILE NO. SVM-10049

RAS--24SA-ES2

1∅

220 - 240

2.7

50/48/46/43/40

R410A

1.90

Capillary tube

∅12.7

Flare connection

∅6.35

Flare connection

RAS-24SKP-ES2

RAS-24SA-ES2

PA271X3CS-4MUL

Automatic louver

15*

25*

320

1050

228

Finned tube

Cross flow fan

1240

1000

850

890 900 320

Finned tube

Propeller fan

2000

Fuse , IOL

15 ~ 43

240V

6.85

2070

4200

− 3 −

Page 5

FILE NO. SVM-10049

MODEL RAS-24SKHP-ES2

RAS-24S2AH-ES2

ITEM Cooling Heating

Capacity

220V

6.78

Phase

Power source

Hz Power consumption W Power factor %

2030

98 96 Running Indoor A 0.30 Current Outdoor A 9.40 9.10 8.95 8.90 Starting current A Moisture removal lit/h Noise Indoor (H/M+/M/L+/L) dB

Outdoor (220-240V) dB

56-57

Refrigerant Name of refrigerant

Rated amount kg Refrigerant control Interconnection Gas side size mm pipe Connection type

Liquid side size mm

Connection type

Maximum length m

(One way)

Maximum height m

difference

INDOOR UNIT

Dimensions Height mm

Width mm

Depth mm Net weight kg Evaporator type Indoor fan type Airflow volume High fan

Medium fan

Low fan

1240

1000

Fan motor output W Air filter

OUTDOOR UNIT

Dimensions Height mm

Width mm

Depth mm Net weight kg Condenser type Outdoor fan type Airflow volume

4000 4200 4000 Fan motor output W Compressor Model

Output W Safety device Louver type Usable outdoor temperature range °C

15 ~ 43 -10 ~ 24

Note *1 Chargeless pipe

*2 Maximum pipe

240V 220V

6.82 7.28

1∅

220 - 240

2100 1930

2.7

50/48/46/43/40

R410A

2.00

Capillary tube

∅12.7

Flare connection

∅6.35

Flare connection

15*

25*

RAS-24SKHP-ES2

320

1050

228

Finned tube

Cross flow fan

Honeycomb woven filter with PP frame

RAS-24S2AH-ES2

890 900 320

Finned tube

Propeller fan

PA271X3CS-4MUL

2000

Fuse , IOL

Automatic louver

240V

7.32

2050

57-58

1240

1000

850850

4200

− 4 −

Page 6

Note : 1

• Capacity is based on the following temperature conditions.

FILE NO. SVM-10049

Condition

Temperature

(DB) 27°C20°C

Indoor unit inlet air temperature

(WB) 19°C15°C

(DB) 35°C7°C

Outdoor unit inlet air temperature

(WB) 24°C6°C

Note : 2

• Charge refrigerant according to the table below.

Refrige rant

*1 No need to charge

extra refrigerant

*2 Need to charge

extra refrigerant

JIS C9612

Cooling Heating

RAS-24SKP-ES2 / RAS-24SA-ES2

RAS-24SKHP-ES2 / RAS-24S2AH-ES2

15 m or less

Over 15 m up to 25 m (20 g/m)

– 5 –

Page 7

2-1. Indoor Unit

FILE NO. SVM-10049

2. CONSTRUCTION VIEWS

Grille Inlet

Front Panel

73.57

Knock out system

Heat exchanger

320

78 72

Air inlet

278 200 222 150

132

1050

Air outlet

200

Air filter

72 78

228

Knock out system

73.5

157

Drain hose (0.5m)

320

525

Hanger

Connecting pipe (0.39m)

12.70)

(Flare

85 23

Hanger

Hanger Hanger

262.5

786

235

215

Center line

Installation plate outline

Connecting pipe (0.49m)

235

215

262.5

Hanger

6.35)(Flare

For stud bold ( For stud bold (

10947 215.5 153.5

Wireless remote controller

Remote controller holder

6) 8~

10)

Outline of indoor unit

125

− 6 −

Page 8

2-2. Outdoor Unit

FILE NO. SVM-10049

56.5

365

A Detail Drawing (Back leg)

600

FAN-GUARD

890

365

547

113

25 Drain outlet

438

2- 12x17 Hole

525

365

12x17 Hole

HANDLE

B Detail Drawing (Front leg)

56.5

PANEL-PIPING-BK

320

HANDLE

200 or more

320

150

Z View

600

Air inlet

150600

Service port

600 or more

365

400

Gas-side (Flare 12.70)

Liquid-side (Flare 6.35)

128

150 or more

Air outlet

1000 or more

Installation dimension

– 7 –

4x 17 Long holes

Page 9

3. WIRING DIAGRAM

3-1. RAS-24SKP-ES2 / RAS-24SA-ES2

FILE NO. SVM-10049

OUTDOOR TERMINAL BLOCK

POWER SUPPLY 220 − 240 V ~ 50 Hz

BLK

RED

BLK

RED

MAGNETIC CONTACTOR

BLK BLK

SPARK KILLER

A2 A1

52C

1/L1 2/T1

6/T35/L3

RED

CAPACITOR

GRY

CHASSIS

RED

WHI PNK

COMPRESSOR

CAPACITOR

OUTDOOR

UNIT

BLK

WHI RED

FAN MOTOR

BLK

– 8 –

Page 10

3-2. RAS-24SKHP-ES2 / RAS-24S2AH-ES2

FILE NO. SVM-10049

OUTDOOR TERMINAL BLOCK

POWER SUPPLY 220- 240 V ~ 50 Hz

BLK

RED

BLK

RED

WHI PNK

COMPRESSOR

GRN&YEL

5/L3

CHASSIS

FERRITE CORE

RED

CONTACTOR

1/L1

MAGNETIC

52C

BLK

6/T3

RED

WHI RED

FAN MOTOR

2/T1

CAPACITOR CAPACITOR

TRANSFORMER

OUTDOOR UNIT

BLK BLK

BLK

RED

BLK

WHI

RED

GRY

BLU

YEL

BLU

BLU COIL FOR 4 WAY VALVE

MAIN P.C. BOARD (MCC-890)

1 2

CN06

CN05

SG01

F01

250VAC T6. 3A

CN01

CN11

313

CR11

CN02

CR12

CR13

TNR R74

CN03

1 1

RY07

RY05

TNR R73

RY06

CN07

CN08

DISCHARGE PIPE SENSOR (TD)

BLU

1 2 3

BLU

BLK

1 2 3

BLK

HEAT EXCHANGER SENSOR (TE)

– 9 –

Page 11

4. SPECIFICATION OF ELECTRICAL PARTS

4-1. Indoor Unit (RAS-24SKP-ES2)

FILE NO. SVM-10049

No.

1 Fan motor (for indoor) MF-340-30-1RT DC 340V, 30W 2 Thermo sensor (TA-sensor) ——— 10 kΩ at 25°C 3 Switching Transformer (T01) SWT-77 DC7V, 12 V 4 Microcontroller TMP87CM40ANG-6P68 5 Heat exchanger sensor

(TC-sensor)

6 Line filter (L01) LC*SS11V-R06270 27mH, 600mA 7 Diode (DB01) D3SBA60 4 A, 600 V 8 Capacitor (C03) EKMH451VSN121MQ35S 120 µF, 450 V 9 Fuse (F01) BET6.3A 6.3 A, 250 V

10 Varistor (R09, R10) SR561K14DO 560 V

11 Resistor (R01) RF-5TK1R8

2 TLou

Relay : (RY03)

P5War1ts name

er motor MP24Z3T Output (Rated) 2 W, 16 poles, 4 phase,

ype

——— 10 kΩ at 25°C

1.8Ω ,

DC 12 V

G5NB-1A-CA

Coil DC 12V, 16.7mA, Contact AC 250V, 3A

Specifications

4-2. Outdoor Unit (RAS-24SA-ES2)

No. Parts name Type Specifications

Output (Rated) 2000W, 2poles, 1 phase, 220-240V 50Hz

1 Compressor PA271X3CS-4MU2 Winding resistance (Ω  ) Red-Black White-Black

(at 20°C) 1.27 2.10 Output (Rated) 42W, 4poles, 1 phase, 220 − 240V, 50Hz

2 Fan motor (for outdoor) WLF-240-85A Winding resistance (Ω) Red-Black White-Black

(at 20° C) 70.5 120.1

Running capacitor

(for fan motor) Running capacitor

(for compressor)

Magnetic contactor

DS451355NPQB AC 450V, 3.0µ F

32332I5606J063 A

A35P 220-240V, 50Hz

C 450V, 60µ F

– 10 –

Page 12

FILE NO. SVM-10049

4-3. Indoor Unit (RAS-24SKHP-ES2)

No. Parts name Type Specifications

1 Fan motor (for indoor) MF-340-30-1RT DC 340V, 30W 2 Thermo sensor (TA-sensor) ——— 10 kΩ at 25°C 3 Switching Transformer (T01) SWT-77 DC 7V, 12V 4 Microcontroller TMP87CM40ANG-6P68 5 Heat exchanger sensor

(TC-sensor)

6 Line filter (L01) LC*SS11V-R06270 27mH, 600mA 7 Diode (DB01) D3SBA60 4 A, 600 V 8 Capacitor (C03) EKMH451VSN121MQ35S 120 µF, 450 V 9 Fuse (F01) BET6.3A 6.3 A, 250 V

10 Varistor (R09, R10) SR561K14DO 560 V

11 Resistor (R01) RF-5TK1R8 1.8Ω , 5W 12 Louver motor MP24Z3T Output (Rated) 2 W, 16 poles, 4 phase,

——— 10 kΩ at 25°C

DC 12 V

4-4. Outdoor Unit (RAS-24S2AH-ES2)

No. Parts name Type Specifications

Output (Rated) 2000W, 2poles, 1 phase, 220 − 240V, 50Hz

1 Compressor PA271X3CS-4MU2 Winding resistance (Ω) Red-Black White-Black

(at 20°C) 1.27 2.10 Output (Rated) 42W, 4poles, 1 phase, 220 – 240V, 50Hz

2 Fan motor (for outdoor) FG-240-42A-1 Winding resistance (Ω) Red-Black White-Black

(at 20°C) 70.5 120.1

Running capacitor

(for fan motor) Running capacitor

(for compressor) Solenoid coil

(for 4-way valve) 6 Thermo sensor TE / TD 10kΩ at 25°C / 50kΩ at 25°C 7 Magnetic contactor A35P 220 ~ 240V, 50Hz 8 Transformer TT-05 220 ~ 240V 9 Microcontroller TMP47C840N

10 Varistor (R73, R74) 15G471K 470V 11 Fuse (F01) TSCR T6.3A, 250V

DS451305NPQB AC 450V, 3.0µF

B32332I5606J063 AC 450V, 60µF

VHV (STF) AC 220 ~ 240V

– 11 –

Page 13

5. REFRIGERATION CYCLE DIAGRAM

5-1. RAS-24SKP-ES2 / RAS-24SA-ES2

FILE NO. SVM-10049

Indoor unit

Cooling

0.39 m (Connecting pipe)

∅

12.7

O.D.:12.7 mm O.D.:6.35 mm

Cooling

Compressor

Packed valve

(∅12.7 )

Gas container connection (Reinstall etc.)

PA271X3CS-4MUL

Heat exchanger

Cross flow fan

0.49 m (Connecting pipe)

∅

6 .35

Packed valve

(∅6.35)

Capillary tube

450 s

∅2.0x

Heat exchanger

Refrigerant R410A 1.90 kg

Cooling

Propeller fan Outdoor unit

Mark ( ) means check points of Gas Leak

Ambient temp.

50 Hz

Standard

pressure

(MPaG)

Surface temp. of heat

exchanger interchanging

pipe

(°C)

Fan speed

(indoor)

conditions DB/WB

(°C)

Indoor Outdoor

Standard 0.86 9.4 High 27/19 35/24

Cooling High temperature 1.03 14.3 High 32/23 43/26

Low temperature 0.65 1.9 Low 21/15 21/15

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

– 12 –

Page 14

5-2. RAS-24SKHP-ES2 / RAS-24S2AH-ES2

FILE NO. SVM-10049

Indoor unit

Cooling

0.39 m (Connecting pipe)

Æ12.7

O.D.:12.7 mm O.D.:6.35 mm

Cooling

Heating

Packed valve

(Æ12.7)

Heating

4-way valve

Cooling

Discharge Muffler

∅

25x160L

Compressor

Accumulator

PA271X3CS-4MUL

Heat exchanger

Cross flow fan

Capillary tube Æ2.0 x 700

Packed valve

(Æ6.35)

Capillary tube

Æ2.0 x 450

0.49 m

(Connecting pipe)

Æ6.35

Heat exchanger

Refrigerant R410A 2.00 kg.

Cooling

Heating

Propeller fan Outdoor unit

Mark ( ) means check points of Gas Leak.

Ambient temp.

50Hz

Standard

pressure

(MPaG)

Surface temp. of heat

exchanger interchanging

pipe

(°C)

Fan speed

(indoor)

conditions DB/WB

(°C)

Indoor Outdoor

Standard 2.64 44.7 High 20/15 7/6

Heating Overload*1 3.54 ~ 3.80 49.3 ~ 51.0 Low 27/- 24/18

Low temperature 2.28 30.3 High 20/

-10/-10

Standard 0.90 11.6 High 27/19 35/24

Cooling Overload 1.10 17.5 High 32/23 43/26

Low temperature 0.73 2.6 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.

- 13 -

Page 15

6. CONTROL BLOCK DIAGRAM

6.1 RAS-24SKP-ES2 / RAS-24SA-ES2

Indoor Unit Control Panel

Heat Exchanger Sensor

Functions

• Louver Control

FILE NO. SVM-10049

M.C.U.

Operation

Display

Temperature Sensor

Infrared Rays Signal Receiver

Initiallizing Circuit

Infrared

Rays

Remote

Control

From Outdoor Unit

240 V AC 50 Hz

Clock Frequency

Oscillator Circuit

Power Supply

Circuit

Noise Filter

• 3-minute Delay at Restart for Compressor

• Motor Revolution Control

• Processing

(Temperature Processing)

• Timer

Outdoor unit

ON/OFF Signal

Relay Driver

Relay RY03

Outdoor Unit

Louver ON/OFF Signal

Louver Driver

Timer

Display

Filter Sign

Display

Fan Only

Sign Display

Hi Power

Sign Display

Indoor

Fan Motor

Louver Motor

REMOTE CONTROL

Infrared Rays

Remote Control

Operation ( )Operation ( )

Operation Mode Selection

AUTO, COOL, DRY, FAN ONLY

Temperature Setting

Fan Speed Selection

ON TIMER Setting

OFF TIMER Setting

Louver Auto Swing

Louver Direction Setting

ECO

Hi power

TIMER 1.3.5.9H

COMFORT SLEEP

QUIET

– 14 –

Page 16

6.2 RAS-24SKHP-ES2 / RAS-24S2AH-ES2

Indoor Unit Control Panel

Heat Exchanger Sensor

Functions

• Louver Control

FILE NO. SVM-10049

M.C.U.

Operation

Display

Temperature Sensor

Infrared Rays Signal Receiver

Initiallizing Circuit

Infrared

Rays

Remote

Control

From Outdoor Unit

240 V AC 50 Hz

Clock Frequency Oscillator Circuit

Power Supply

Circuit

Noise Filter

• 3-minute Delay at Restart for Compressor

• Motor Revolution Control

• Processing

(Temperature Processing)

• Timer

• Serial Signal Communication

Louver ON/OFF Signal

Louver Driver

Serial Signal Transmitter/Receiver

Serial Signal Communication

Timer

Display

Filter Sign

Display

PRE DEF.

Sign Display

Hi Power

Sign Display

Indoor

Fan Motor

Louver Motor

REMOTE CONTROL

Infrared Rays

Remote Control

Operation ( )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

– 15 –

Page 17

7. OPERATION DESCRIPTION

7-1. Remote control

7-1-1. Function of Push Putton

Infrared signal emitter

Start/Stop button

Mode select button (MODE)

Temperature button (TEMP)

Fan speed button (FAN)

Swing louver button (SWING)

Set louver button (FIX)

On timer button (ON) Off timer button (OFF)

Sleep timer button (SLEEP)

Timer setup button (SET)

11 12

Timer clear button (CLR)

Memory and Preset button (PRESET)

13 14

One Touch button (ONE-TOUCH)

High power button (Hi-POWER)

Economy button (ECO)

Quiet button (QUIET)

Comfort sleep button (COMFORT SLEEP)

Filter reset button (FILTER)

Clock Reset button (CLOCK)

Check button (CHK)

FILE NO. SVM-10049

8 10 21

PRESET

ONE-TOUCH

QUIET

SWING

TIMER

SLEEP

CHK

FAN

TEMP

MODE

COMFORT

SLEEP

FIX Hi-POWER ECO

OFF

FILTER

CLOCK

4 3

15 16

CLR

SET

− 16 −

Page 18

FILE NO. SVM-10049

7-1-2. Display of Remote Control

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

1. Transmission mark

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

indicates when the

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.

5. TIMER and clock time indicator

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 button for more than 3 seconds while the mark is

blinks. Press another button to turn off the mark.

mark is shown when holding down the

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.

− 17 −

Page 19

7-2. Outline of Air Conditioner Control

This is a fixed capacity type air conditioner, which uses a DC motor for an indoor fan. The DC motor drive circuit is mounted in the indoor unit. And electrical parts which operate the compressor and the outdoor fan motor, are mounted in the outdoor unit. The air conditioner is mainly controlled by the indoor unit controller. The controller operates the indoor fan motor based upon commands transmitted by the remote control and transfers the operation commands to the outdoor unit. 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

Operations according to the commands

from the indoor unit

FILE NO. SVM-10049

• 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.

(1)

(2) Swing

7-2-2. Indoor Fan Control

Table (7-2-1) Cooling

Louver contr

tical 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.

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.

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 (7-2-2) Heating

Indication

L L+

M M+

Fan speed

Low

(L + M) / 2

Med

(M + H) / 2

High

Indication L L+

M M+

Fan speed

Low

(L + M) / 2

Med

(M + H) / 2

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,

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

OPERATION

MODE

RAS-24SKP-ES2

Model

OPERATION

MODE

RAS-24SKHP-ES2

Model

Cooling Fan only Dr

rpm

ir flow volume (m3/h)

Cooling Fan only Dr Heat

rpm

ir flow volume (m3/h)

1340

1240

UH H M+ M L+ L L- UL SL

1340

1240

and heat exchanger temperature.

FAN TA

H M+ M L+ L L- UL SL H M+ M L+ L L-

M+ M L+ L L- UL SL

1220 1100 1025 950 850 700 600

1120 1000 930 850 750 600 500

FAN TA

H M+ M L+ L L-

M+ M L+ L L- UL SL

1220 1100 1100 950 950 950 850 700 600

1120 1000 1000 850 850 850 750 600 500

- 18 -

Page 20

FILE NO. SVM-10049

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.

°C

7-3-2. Cooling operation

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

(1) The compressor, 4-way valve, (Heat pump model

only) outdoor fan and operation display lamp are controlled as shown in Fig. 7-3-2.

° C



ON ON

OFF OFF OFF ON

4-way valve

Compressor

Outdoor fan

OPERATION

(Room temp.) (Preset temp.)

Preset temp.

0.5

Fig. 7-3-2

display lamp

+2.5

+1.5

+0.5

(Room temp.) − (Preset temp.)

Preset 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]

M+

(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.

°C

(Room temp.) − (Preset temp.)

Preset temp.

+2.5

+1.5

+0.5

-0.5

M+

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]

- 19 -

Page 21

FILE NO. SVM-10049

7-3-3. Dry operation

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

(1) The compressor, 4-way valve, (Heat pump model

only) outdoor fan and operation display lamp are controlled as shown in Fig. 7-3-4.

° C

ON:6min.

OFF:4min.

ON:5min.

OFF:5min.

OFF

4-way valve

Outdoor fan

OPERATION

display lamp

(Room temp.) (Preset temp.)

Preset temp.

ON:6min.

OFF:4min.

OFF

ON:5min.

OFF:5min.

OFF

Compressor

Fig. 7-3-4

7-3-4. Heating operation *Heat pump model only

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

(1) The compressor, 4-way valve, outdoor fan and

operation display lamp are controlled as shown in Fig. 7-3-6.

° C

Preset temp.

0.5

(Room temp.) (Preset temp.)

OFF

Compressor

OFF

4-way valve

Outdoor fan

OPERATION

Fig. 7-3-6

display lamp

(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.

Compressor

Outdoor fan

Indoor fan

ON ON ON ON

OFF OFF OFF

L. *S.L. S.L.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.

(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 temp.

°C

-0.5

-1

-1.5

-2

-5.0

-5.5

[FAN AUTO]

(Room temp.) − (Preset temp.)

*1 *2

*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

- 20 -

Page 22

FILE NO. SVM-10049

(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

Fan speed AUTO Fan speed MANUAL

46Tc34 45 33

33 21 32 20

*A+0 *A+0

*A-8 *A-8

Fan speed MANUAL or AUTO in starting Fan speed AUTO in stability

* No limitation while fan speed MANUAL mode is in stabilit * A: When Tsc 24, A is 24, and when Tsc < 24, A is Ts

Tsc: Set valu

Normal AUTO

Line-approximate H and SL with Tc.

SL (W2)

Stop

L-H (Up to setting speed)

Line-approximate H and SL with Tc.

SL (W2)

Stop

[In starting and in stability]

In starting

FAN • Until 12 minutes

AUTO

FAN • Room temp. < Set

Manual

passed after operation start

• When 12 to 25 minutes

passed after operation start and room temp. is 3°C or lower than set temp.

temp.–4°C

In stability

• When 12 to 25 minutes

passed after opeartion start and room temp. is than (set ) between preset

• When 25 minutes or

more passed after operation start

• Room temp. Set

temp. –3.5°C

3°C

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

Cooling operation

Fan only operation

-1

Heating operation

(Room temp.) − (Preset temp.)

Heat pump model Cooling model

Fig. 7-3-9

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 OFF.

- 21 -

Page 23

7-4. Drescription of Safety and Reliability Prevention Function

FILE NO. SVM-10049

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

(°C)

Compressor Outdoor fan

Less than 4°C continues

for 5 minutes

OFF

Fig. 7-4-1

7-4-2 High-Temperature Limit Control

*Heat pump model only

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.

7-4-3. Defrost Operation *Heat pump model only

When the indoor unit is in heating operation, if the refrigerant evaporation temperature detected by the outdoor heat exchanger sensor is under the specified temperature, the outdoor unit starts the defrosting operation. At this time, the 4-way valve relay and the outdoor fan motor are turned off. The indoor fan motor is also turned off by the cold draft preventing control of the indoor microcomputer. Then, [PRE. DEF.] lamp on the indoor unit comes on. The defrosting operation stops and the 4-way valve relay, outdoor fan motor and the indoor fan motor are turned on automatically when the refrigerant evaporation increases to the specified temperature, or when the defrosting time is over 12 minutes.

7-4-3-1. Defrost starting condition

A-Zone : If -10°C > Teo ≥

start when. Teo - Te ≥

~ 30 min after operation.

B-Zone : If Te ≤

-18°C, defrost start instantaneously

(Suddenly) 00 ~ 25 min ofter operation

C-Zone : If -2ºC ≥

Teo ≥ -10°C defrost will start when

Teo - Te ≤ -3°C at least 20 sec or ~ 60 min after operation.

- 18°C, defrost will

2.5°C at teat 20 sec or

Compressor

OFF

Outdoor fan

OFF

Fig. 7-4-2

Heat exchanger temp.

(°C) 62

55 54

7-4-3-2. Defrost finish condition.

1) If Te ≥ 3°C at least 60 sec -->4 way value on.

2) If Te ≥ 8°C --> 4 way value on.

Timing

Operation time (4 Loops = Tt)

Td1

Td2

Td3 Td4

Finish time recordStart time record

Defrost time rate : (Td/Tt) x 100 Heating time rate : (Tt - Td) x Tt

Fig. 7-4-3

- 22 -

Page 24

FILE NO. SVM-10049

7-5. One-Touch Operation

(Heatpump Model : RAS-24SKHP-ES2)

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

Fan Operation

AUTO

*AUTO/L

*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.

(Cooling Only Model : RAS-24SKP-ES2)

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

Fan Operation

Hi-POWER

Fig. 7-5-1

*AUTO/L

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 Cooling mode.

3) Target temperature is 22ºC.

4) Louver position is set swing.

5) Fan is controlled as diagram.

Fig. 7-5-2

- 23 -

Time after operation starts (min)

Page 25

FILE NO. SVM-10049

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.

(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 *Heat pump model only

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

function.



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 :

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 *Heat pump model only

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.

1H 3H 5H 9H

– 24 –

Cancel

Page 26

FILE NO. SVM-10049

Heating mode *Heat pump model only

The preset temperature will drop down 1ºC after the comfort sleep mode has operated for 1 hour and

the temperature will decrease another 1ºC after the comfort sleep mode has operated for 2 hour. (The value of the preset temperature on the remote

control does not change.)

Press the [COMFORT SLEEP] button to select this function and period of operation time same as

cooling mode operation.

The principles of comfort sleep mode are:

Quietness for more comfortable. When room

temperature reach setting temperature.

Save energy by changing room temperature

automatically.

The air condition can shut down by itself automatically.

Remarks :

Comfort sleep mode will not operate in dry mode

and fan only mode.

7-10. FILTER Check lamp

When the elapsed time reaches 1000 hours after air purifier operation, the FILTER indicator lights. After cleaning the filters, turn off the FILTER indicator.

How to Turn Off FILTER Indicator

Press [RESET] button on the indoor unit or press filter button on the remote control.

NOTE :

If [RESET] button is pushed while the FILTER indicator is not lit, the indoor unit will start the automatic operation.

When you want a temporary operation while the FILTER lamp lights, press [RESET] button to turn off the FILTER lamp.



– 25 –

Page 27

FILE NO. SVM-10049

7-11. Auto Restart Function

This indoor unit is equipped with an automatic restarting function which allows the unit to restart operating with the set operating conditions in the event of a power supply being accidentally shut down. The operation will resume without warning three minutes after power is restored.

This function is not set to work when shipped from the factory. Therefore it is necessary to set it to work.

7-11-1. How to Set the Auto Restart Function

To set the auto restart function, proceed as follows: The power supply to the unit must be on ; the function will not set if the power is off. Press the [RESET] button located in the center of the front panel continuously for three seconds. The unit receives the signal and beeps three times. The unit then restarts operating automatically in the event of power supply being accidentally shut down.

• When the unit is standby (Not operating)

Operation

Press [RESET] button for more than three seconds. (Less than 10 seconds)

Hi POWER FILTER PAP TIMER OPERATION

RESET

RESET button

• When the unit is in operation

Operation

Press [RESET] button for more than three seconds. (Less than 10 seconds)

Motions

The unit is on standby.

↓

The unit starts to operate. The green indicator is on.

↓ After approx. three seconds,

The unit beeps three times The green indicator blinks and continues to operate. for 5 seconds.

If the unit is not required to operate at this time, press [RESET] button once more or use the remote controller to turn it off.

Motions

The unit is in operation. The green indicator is on.

↓

The unit stops operating. The green indicator is turned off.

Hi POWER FILTER PAP TIMER OPERATION

RESET

RESET button

↓ After approx. three seconds,

The unit beeps three times. The green indicator blinks

for 5 seconds.

If the unit is required to operate at this time, press [RESET] button once more or use the remote controller to turn it on.

– 26 –

Page 28

FILE NO. SVM-10049

7-11-2. How to Cancel the Auto Restart Function

To cancel auto restart function, proceed as follows : Repeat the setting procedure : the unit receives the signal and beeps three times. The unit will be required to be turned on with the remote controller after the main power supply is turned off.

• When the system is on stand-by (not operating)

Operation

Press [RESET] button for more than three seconds. (Less than 10 seconds)

Hi POWER FILTER PAP TIMER OPERATION

RESET

RESET button

• When the system is operating

Operation

Press [RESET] button for more than three seconds. (Less than 10 seconds)

Motions

The unit is on standby.

↓

The unit starts to operate. The green indicator is on.

↓ After approx. three seconds,

The unit beeps three times and continues to operate. If the unit is not required to operate at this time, press [RESET]

button once more or use the remote controller to turn it off.

Motions

The unit is in operation. The green indicator is on.

↓

The unit stops operating. The green indicator is turned off.

↓ After approx. three seconds,

The unit beeps three times.

Hi POWER FILTER PAP TIMER OPERATION

If the unit is required to operate at this time, press [RESET] button once more or use the remote controller to turn it on.

RESET button

RESET

7-11-3. Power Failure During Timer Operation

When the unit is turned off because of power failure during timer operation, the timer operation is cancelled. In that case, set the timer operation again.

NOTE :

The Everyday Timer is reset while a command signal can be received from the remote controller even if it stopped due to a power failure.

– 27 –

Page 29

FILE NO. SVM-10049

7-12. Self-Cleaning Operation

Unit now performing cooling or dry operation

Press “STOP” button

Only timer indicator lights, and Self-Cleaning operation starts

Time set now elapses

Operation stops

• During Self-Cleaning operations: The louver opens slightly. The indoor fan operates continuously at a speed of SL rpm.

1. Purpose

The Self-Cleaning operation is to minimize the growth of mold, bacteria etc. by running the fan and drying so as to keep the inside of the air conditioner clean.

Self-Cleaning operation

When the cooling or dry operation shuts down, the unit automatically starts the Self-Cleaning operation which is then performed for the specified period based on duration

of the operation which was performed prior to the shutdown,

after which the Self-Cleaning operation stops. (The Self-Cleaning operation is not performed after a heating operation.)

2. Operation

1) When the stop signal from the remote controller or timer-off function is received, only the timer indicator light.

2) The period of the Self-Cleaning operation is determined by the duration of the operation performed prior to the reception of the stop code.

3) After the Self-Cleaning operation has been performed for the specified period, the unit stops operation.

Self-Cleaning operation times

Operation time

Up to 10 minutes

Cooling: Auto (cooling) Dry

Heating: Auto (heating)

Auto (fan only)

Shutdown

• To stop an ongoing Self-Cleaning operation at any time Press the start/stop button on the remote controller twice during the Self-Cleaning operation. [After pressing the button for the first time, press it for the

second time without delay (within 10 minutes)].

10 minutes or longer

No Self-Cleaning operation performed

Self-Cleaning operation time

No Self-Cleaning operation

performed (0 minutes)

20 mins.

– 28 –

Page 30

FILE NO. SVM-10049

7-12-1. Self-Cleaning diagram

Operation display ON OFF OFF

FCU fan

FCU louver OPEN OPEN (12.7º) CLOSE

Timer display

Compressor

CDU fan ON or OFF

rpm is depend on presetting. (SL)

depend on presetting of timer function. depend on presetting of timer function.

depend on presetting per room temperature.

Cool mode or dry mode

operation more than 10 mins.

7-12-2. Self-Cleaning function release

How to cencel Self-Cleaning function

To cancel the Self-Cleaning function, proceed as follows:

• Press [RESET] button one time or use remote

control to turn on air conditioner. Display will show

in green color.

• Hold down the [RESET] button for more than

20 seconds. (The air conditioner will stop suddenly when the [RESET] is pressed but keep holding it

continue. The will beep 3 times in the first

3 seconds but it is not related to Self-Cleaning

function)

• After holding about 20 seconds, the air conditioner

will beep 5 times without any blinking of display.

• The Self-Cleaning Operation had been cancelled.

Remark

Presetting of Self-Cleaning function above, AUTO-

ON ON

ON or OFF

Turn off by remote controller or

timer-off function.

OFF OFF

Self-Cleaning mode

operate 20 mins.

Automatically turn-off.

How to set Self-Cleaning function

To set the Self-Cleaning function, proceed as follows.

• Press [RESET] button one time or use remote

control to turn on air conditioner. Display will show in green color.

• Hold down the [RESET] button for more than

20 seconds. (The air conditioner will stop suddenly when the [RESET] is pressed but keep holding it continue. Then will beep 3 times is the first 3 seconds but it is not related to Self-Cleaning

function)

• After holding about 20 seconds, the air conditioner

will beep 5 times and OPERATION display blinks

5 times.

• The Self-Cleaning function had been set.

Remark

Presetting of Self-Cleaning function above, AUTORESTART function had been cancelled. To set

AUTO-RESTART again.

RESTART function had been cancelled. To set AUTO-RESTART again.

OFF

ON or OFF

Operation time

– 29 –

Hi POWER FILTER PAP TIMER OPERATION

RESET

RESET button

Page 31

FILE NO. SVM-10049

8. INSTALLATION PROCEDURE

8-1.Safety Cautions

For general public use

Power supply cord of parts of appliance for outdoor use shall be at least polychloroprene sheathed flexible cord (design H07RN-F) or cord designation

60245 IEC66, 4.0 mm2 or more and 1.5 mm2 or more for connecting cable. (Shall be installed in accordance with national regulations.)

CAUTION

This appliance must be connected to the main power supply by means of a circuit breaker or a switch with a contact separation of at least 3 mm in all poles. If this is not possible, a power supply plug with earth must be used. This plug must be easily accessible after installation. The plug must be disconnected from the power supply socket in order to disconnect the appliance completely from the mains.

To Disconnect the Appliance from the Main Power Supply.

DANGER

• FOR USE BY QUALIFIED PERSONS ONLY.

• TURN OFF MAIN POWER SUPPLY BEFORE ATTEMPTING ANY ELECTRICAL WORK. MAKE SURE

ALL POWER SWITCHES ARE OFF. FAILURE TO DO SO MAY CAUSE ELECTRIC SHOCK.

• CONNECT THE CONNECTING CABLE CORRECTLY. IF THE CONNECTING CABLE IS CONNECTED

WRONGLY, ELECTRIC PARTS MAY BE DAMAGED.

• CHECK THE EARTH WIRE THAT IT IS NOT BROKEN OR DISCONNECTED BEFORE INSTALLATION.

• DO NOT INSTALL NEAR CONCENTRATIONS OF COMBUSTIBLE GAS OR GAS VAPORS.

FAILURE TO FOLLOW THIS INSTRUCTION CAN RESULT IN FIRE OR EXPLOSION.

• TO PREVENT OVERHEATING THE INDOOR UNIT AND CAUSING A FIRE HAZARD, PLACE THE UNIT

WELL AWAY (MORE THAN 2 M) FROM HEAT SOURCES SUCH AS RADIATORS, HEATORS, FURNACE, STOVES, ETC.

• WHEN MOVING THE AIR-CONDITIONER FOR INSTALLING IT IN ANOTHER PLACE AGAIN, BE VERY CAREFUL NOT TO GET THE SPECIFIED REFRIGERANT (R410A) WITH ANY OTHER GASEOUS BODY INTO THE REFRIGERATION CYCLE. IF AIR OR ANY OTHER GAS IS MIXED IN THE REFRIGERANT, THE GAS PRESSURE IN THE REFRIGERATION CYCLE BECOMES ABNORMALLY HIGH AND IT RESULTINGLY CAUSES BURST OF THE PIPE AND INJURIES ON PERSONS.

• IN THE EVENT THAT THE REFRIGERANT GAS LEAKS OUT OF THE PIPE DURING THE INSTALLATION WORK, IMMEDIATELY LET FRESH AIR INTO THE ROOM. IF THE REFRIGERANT GAS IS HEATED BY FIRE OR SOMETHING ELSE, IT CAUSES GENERATION OF POISONOUS GAS.

WARNING

• Never modify this unit by removing any of the safety guards or bypassing any of the safety interlock switches.

• Do not install in a place which cannot bear the weight of the unit. Personal injury and property damage can result if the unit falls.

• Before doing the electrical work, attach an approved plug to the power supply cord. Also, make sure the equipment is properly earthed.

• Appliance shall be installed in accordance with national wiring regulations. If you detect any damage, do not install the unit. Contact your TOSHIBA dealer immediately.

CAUTION

• Exposure of unit to water or other moisture before installation could result in electric shock. Do not store it in a wet basement or expose to rain or water.

• After unpacking the unit, examine it carefully for possible damage.

• Do not install in a place that can increase the vibration of the unit. Do not install in a place that can amplify

the noise level of the unit or where noise and discharged air might disturb neighbors.

• To avoid personal injury, be careful when handling parts with sharp edges.

• Please read this installation manual carefully before installing the unit. It contains further important instruc-

tions for proper installation.

– 30 –

Page 32

FILE NO. SVM-10049

REQUIREMENT OF REPORT TO THE LOCAL POWER SUPPLIER

Please make absolutely sure that the installation of this appliance is reported to the local power supplier before installation. If you experience any problems, or if the installation is not accepted by the supplier, the service agency will take adequate countermeasures.

– 31 –

Page 33

8-2. Installation Diagram of Indoor and Outdoor Units

e r

o m

r o

m m 0

Hook

Remote control holder

Hook

Installation

plate

TOSHIBA New IAQ filter

Batteries

(

TOSHIBA New IAQ filter

8 Pan head

)

wood screw

Shield pipe

FILE NO. SVM-10049

For the rear left and left piping

Wall

Insert the cushion between the indoor unit and wall, and tilt the indoor unit for better operation.

Do not allow the drain hose to get slack.

Cut the piping hole sloped slightly.

Make sure to run the drain hose sloped downward.

The auxiliary piping can be connected to the left, rear left, rear right, right, bottom right or bottom left.

2 Wireless remote control

Before installing the wireless remote controller

• Loading Batteries

1. Remove the battery cover.

2. Insert 2 new batteries (AAA type) following the (+) and (

) positions.

Vinyl tape Apply after carrying out a drainage test.

e r

o m

r o

m m 0

0 5

Saddle

Right

Rear right

Bottom right

Rear left

Left

Bottom left

Insulate the refrigerant pipes separately with insulation, not

Extension drain hose (Not available, provided by installer)

together.

8 mm thick heat resisting polyethylene foam

3 Batteries

2 Wireless remote controller

– 32 –

Page 34

8-3.Installation

8-3-1. Optional installation parts

FILE NO. SVM-10049

Part

Code

Refrigerant piping Liquid side : ∅6.35 mm

Gas side : ∅12.70 mm

Pipe insulating material

(polyethylene foam, 8 mm thick) Putty, PVC tapes

525 mm

400 mm

365 mm

150 mm

600 mm 150 mm

Air inlet

45 mm

Parts name

Q'ty

One

each

One

each

Air outlet

Drain nipple mounting hole

Fig. 8-3-1

Secure the outdoor unit with fixing bolts and nuts if the unit is likely to be exposed to a strong wind. Use ∅ 8 mm or ∅ 10 mm anchor bolts and nuts.

– 33 –

Page 35

8-3-2. Accessory and installation parts

FILE NO. SVM-10049

Part

No.

Part name (Q’ty)

Installation plate x 1

Wireless remote control x 1

Battery x 2

Others

Owner’s manual

Installation manual

Name

Part

No.

Part name (Q’ty)

Remote control holder x 1

TOSHIBA New IAQ filter x 2

Mounting screw ∅4 x 25 x 6

Part

No.

Part name (Q ’ty)

Pan head wood screw ∅3

.1 x 16

x 2

Screw ∅ 4 x 10 x 2

Cap water proof x 2

Drain nipple* x 1

The part marked with asterisk ( outdoor unit.

*) is packaged with the

– 34 –

Page 36

FILE NO. SVM-10049

3-3-3. Installation/Servicing Tools <Changes in the product and components>

In the case of an air conditioner using R410A, in order to prevent any other refrigerant from being charged accidentally, the service port diameter of the outdoor unit control valve (3 way valve) has been changed. (1/2 UNF 20 threads per inch)

• In order to increase the pressure resisting strength of the refrigerant piping, flare processing diameter and size of opposite side of flare nuts has been changed. (for copper pipes with nominal dimensions 1/2 and 5/8)

New tools for R410A

Gauge manifold

Charge hose

Electronic balance for refrigerant charging

Torque wrench (nominal diam. 1/2, 5/8)

Flare tool (clutch type)

Gauge for projection adjustment

V acuum pump adapter

Applicable to R22 model Changes

As pressure is high, it is impossible to measure by means of conventional gauge. In order to prevent any other refrigerant from being charged, each port diameter has been changed.

In order to increase pressure resisting strength, hose materials and port size have been changed (to 1/2 UNF 20 threads per inch). When purchasing a charge hose, be sure to confirm the port size.

As pressure is hight and gasification speed is fast, it is difficult to read the indicated value by means of charging cylinder, as air bubbles occur.

The size of opposite sides of flare nuts have been increased. Incidentally, a common wrench is used for nominal diameters 1/4 and 3/8.

By increasing the clamp bar’s receiving hole, strength of spring in the tool has been improved.

—

Used when flare is made by using conventional flare tool.

Connected to conventional vacuum pump. It is necessary to use an adapter to prevent vacuum pump oil from flowing back to the charge hose. The charge hose connecting part has two ports-one for conventional refrigerant (7/16 UNF 20 threads per inch) and one for R410A. If the vacuum pump oil (mineral) mixes with R410A a sludge may occur and damage the equipment.

Gas leakage detector

• Incidentally, the “refrigerant cylinder” comes with the refrigerant designation (R410A) and protector coating in the U. S’s ARI specified rose color (ARI color code: PMS 507).

• Also, the “charge port and packing for refrigerant cylinder” require 1/2 UNF 20 threads per inch corresponding to the charge hose’s port size.

Exclusive for HFC refrigerant.

– 35 –

Page 37

FILE NO. SVM-10049

8-4. Indoor Unit

8-4-1. Installation Place

• A place which provides enough spaces around the indoor unit as shown in the diagram.

• A place where there are no obstacle near the air inlet and outlet.

• A place which allows easy installation of the piping to the outdoor unit.

• A place which allows the front panel to be opened.

• The indoor unit shall be installed so that the top of

the indoor unit is positioned at least 2m in height.

• Also, avoid putting anything on the top of the indoor unit.

CAUTION

• Direct sunlight on the indoor unit wireless

receiver should be avoided.

• The microprocessor in the indoor unit should

not be too close to r-f sources. (For details, see the owner's manual.)

• Should be placed where there are no obstacles, such as curtains, that may block the signal.

• Do not install the remote controller in a place

exposed to direct sunlight or close to a heating source, such as a stove.

• Keep the remote controller at least 1 m away from

the nearest TV set or stereo equipment. (This is necessary to prevent image disturbances or noise interference.)

• The location of the remote controller should be

determined as shown below.

(Side view)

Indoor unit

(Top view)

Indoor unit

8-4-2. Drilling a Hole and Mounting Instal-

lation Plate

When install the refrigerant pipes from the rear.

e center of pipe hole

m from the right side edge is

23mm

35 120 180 240

Pipe hole

dia.65mm

The center of the pipe hole is above the arrow.

Fig. 8-4-2

1. After determining the pipe hole position on the installation plate ( ð ) drill the pipe hole (Ø65 mm) at a slight downward slant to the outdoor side.

NOTE :

• When drilling into a wall that contains a metal lath,

wire lath or metal plate, be sure to use a pipe hole brim ring sold separately.

Anchor bolt holes

5 3

2 1

Hook

the center of pipe hole

Offset 85mm from the left side edge is

Offset 23mm from the right side edge is

the center of pipe hole

2 m or more from floor

Reception range

Remote controller

Fig. 8-4-1

Reception range

Remote controller

– 36 –

Pipe hole

Indoor unit

Hook

Thread

Weight

Fig. 8-4-3

Hook Mounting Screw

Pipe hole (dia. 65mm)

Installation

plate

Page 38

FILE NO. SVM-10049

1. Securely fit the installation plate onto the wall by screws with the upper and lower catches, that hold the indoor unit, facing out.

2. To mount the installation plate on a concrete wall use anchor bolts. Drill the anchor bolt holes as illustrated in the above figure.

3. Install the installation plate horizontally and level.

CAUTION

When installing the installation plate with mounting screw, do not use the anchor bolt hole. Otherwise the unit may fall down and result in personal injury and property damage.

Installation plate <Keep horizontal direction>

Anchor bolt

Projection 15mm or less

8-4-3. Electrical Work

1. The supply voltage must be the same as the rated voltage of the air conditioner.

2. Prepare a power source for the exclusive use of the air conditioner.

NOTE :

• Wire type :

More than 1.5 mm2 H07RN-F or 60245IEC66.

CAUTION

• This appliance can be connected to a main circuit breaker in either of the following two ways.

1. Connection to fixed wiring:

A switch or circuit breaker which disconnects all poles and has a contact separation of at least 3 mm must be incorporated in the fixed wiring. An approved circuit breaker or switch must be used.

2. Connection with power supply plug:

Attach power supply plug with power cord and plug it into wall outlet. An approved power supply cord and plug must be used.

Fig. 8-4-4

5 mm dia. hole

7 Mounting screw Ø4 × 25

Clip anchor (local parts)

Fig. 8-4-5

CAUTION

Failure to securely install the unit may result in personal injury and/or property damage if the unit falls.

• In case of block, brick, concrete or similar type walls, drill 5 mm dia. holes in the wall.

• Insert clip anchors for the  mounting screws.

NOTE :

• Install the installation plate using mounting screws between 4 to 6, being sure to secure all four corners.

NOTE :

• Perform wiring work being sure the wire length is long enough.

8-4-4. Wiring Connection

Wiring the connecting cable can be carried out without removing the front panel.

1. Remove the air inlet grille. Open the air inlet grille

upward and pull it toward you.

2. Remove the terminal cover and cord clamp.

3. Insert the connecting cable (or as according to

local regulations/codes) into the pipe hole on the wall.

4. Pull the connecting cable through the cable slot

on the rear panel so that it protrudes about 15 cm out of the front.

5. Insert the connecting cable fully into the terminal

block and secure it tightly with screws.

6. Tightening torque: 1.2 N•m (0.12 kgf•m)

7. Secure the connecting cable with the cord clamp.

8. Attach the terminal cover, rear plate bushing and

air inlet grille on the indoor unit.

– 37 –

Page 39

FILE NO. SVM-10049

CAUTION

• Be sure to refer to the wiring system diagram labeled inside the front panel.

• Check local electrical regulations for any specific wiring instructions or limitations.

Cord clamp

Terminal cover

Screw

Connecting cable

Screw

out

20 mm

5 c

Fig. 8-4-6

110 mm

Terminal block

Earth line

Connecting cable

Ear

th line

8-4-5. Piping and Drain Hose Installation

• Since condensation results in machine trouble, make sure to insulate both the connecting pipes separately. (Use polyethylene foam as insulating material.)

Rear right

Rear left

Bottom left

Changing

Left

drain hose

Bottom right

Die-cutting

Right

Front panel slit

Fig. 8-4-8

1. Die-cutting front panel slit

Cut out the slit on the left or right side of the front panel for the left or right connection and the slit on the bottom left or side of thefront panel for the bottom left or right connection with a pair of nippers.

2. Changing drain hose

For left connection, left-bottom connection and rear-left connection’s piping, it is necessary to relocate the drain hose and drain cap.

Piping preparation

10 mm

80 mm

Stripping length of the connecting cable

Fig. 8-4-7

NOTE :

• Use stranded wire only.

• Wire type : H07RN-F or more

Clip drain cap with needle-nose pliers, and pull out.

Fig. 8-4-9

The drain hose is secured in place by a screw. Remove the screw securing the drain hose, then pull

out the drain hose.

Heat insulator

Drain hose

– 38 –

Fig. 8-4-10

Page 40

FILE NO. SVM-10049

1. Insert hexagonal wrench (4 mm).

4 mm

Fig. 8-4-11

2. Firmly insert drain cap.

No gap

Do not apply lubricating oil (refrigerant machine oil) when inserting the drain cap. If applied, deterioration and

Insert a hexagon wrench (Ø4mm)

drain leakage of the drain plug may occur.

• After making slits on the front panel with a knife or similar tool, cut them out with a pair of nippers or an equivalent tool.

Slit

Fig. 8-4-14

<Left-hand connection with piping>

Bend the connecting pipes so that they are positioned within 43 mm above the wall surface.

If the connecting pipes are positioned more than 43 mm above the wall surface, the indoor unit may be unstable.

When bending the connecting pipe, make sure to use a spring bender to avoid crushing the pipe.

Refer to the table below for the bending radius of each connection pipe.

Fig. 8-4-12

Always use the original scre w that secured the drain hose to the unit. If using a different screw may cause water to leak.

Insert the drain hose firmly until the connector contacts with the insulation, then secure it in place using the original screw.

CAUTION

Securely insert the drain hose and drain cap;

otherwise, water may leak.

• After making slits on the front panel with a knife or similar tool, cut them out with a pair of nippers or an equivalent tool.

Outer diameter

6.35 mm

12.7 mm

Bending radius

30 mm

0 mm

To connect the pipe after installation of the unit (figure)

(To the front flare)

520 mm

420 mm

Liquid side

R30 or less (Ø6.35), R50 or less (Ø12. 7) Use polishing (polyethylene core or the like for bending pipe).

43 mm

Gas side

Outward form of indoor unit

Use a screwdriver handle, etc.

Fig. 8-4-15

Slit

Fig. 8-4-13

NOTE :

If the pipe is incorrectly bent, the indoor unit may be unstable on the wall.

After passing the connecting pipe through the pipe hole, connect the connecting pipe to the auxiliary pipes and wrap the facing tape around them.

– 39 –

Page 41

FILE NO. SVM-10049

50 mm or more

Do not rise the drain hose.

Do not form the drain hose into the waved shape.

Do not put the drain hose end into water.

Do not put the drain hose end in the drainage ditch.

CAUTION

• Bind the auxiliary pipes (two) and connecting cable with facing tape tightly.

In case of leftward piping and rear-leftward piping, bind the auxiliary pipes (two) only with facing tape.

Indoor unit

Auxiliary pipes

Installation plate

Fig. 8-4-16

• Carefully arrange the pipes so that none of the pipes stick out of the rear plate of the indoor unit.

• Carefully connect the auxiliary pipes and connecting pipes to each other and cut off the insulating tape wound on the connecting pipe to avoid double-taping at the joint, moreover, seal the joint with the vinyl tape, etc.

• Since condensation can result in machine performance trouble, be sure to insulate both connecting pipes. (Use polyethylene foam as insulating material.)

• When bending a pipe, be careful not to crush it.

Connecting cable

Information

The lower part of indoor unit may float, due to the condition of piping and you cannot fix it to the installation plate. In that case, use the 9 screws

trovided to fix the unit and the installation plate.

Screw

Fig. 8-4-19

8-4-7. Drainage

1. Run the drain hose at a downward sloped angle.

NOTE :

• Hole should be made at a slight downward slant

on the outdoor side.

Screw

8-4-6. Indoor Unit Installation

1. Pass the pipe through the hole in the wall, and hook the indoor unit on the installation plate at the upper hooks.

2. Swing the indoor unit to right and left to confirm that it is firmly hooked on the installation plate.

3. While pressing the indoor unit onto the wall, hook it at the lower part on the installation plate. Pull the indoor unit toward you to confirm that it is firmly hooked on the installation plate.

Hook

• For detaching the indoor unit from the installation

plate pull the indoor unit toward you while pushing the bottom up at the specified places.

Hook here

Installation plate

Fig. 8-4-17

Push (unhook)

Fig. 8-4-20

2. Put water in the drain pan and make sure that the water is being drained outside.

3. When connecting extension drain hose, insulate the connection part of extension drain hose with

shield pipe.

Shield pipe

Drain hose

Inside the room

Extension drain hose

Fig. 8-4-21

CAUTION

Install the drain pipe for proper drainage. Improper drainage can result in water dripping

inside the room.

This air conditioner has been designed to drain water collected from condensation which forms on the back of the indoor unit, to the drain pan.

Therefore, do not locate the power cord and other parts at a high place than the drain guide.

PushPush

Fig. 8-4-18

– 40 –

Space for pipes

Wall

Drain guide

Page 42

8-5. Outdoor Unit

8-5-1. Installation place

• A place which provides the spaces around the outdoor unit as shown in the installation diagram

of indoor and outdoor unit.

•

A place which can bear the weight of the outdoor

unit and does not allow an increase in noise level

and vibration.

• A place where the operation noise and discharged

air do not disturb your neighbors.

• A place which is not exposed to a strong wind.

• A place free of a leakage of combustible gases.

• A place which does not block a passage.

• When the outdoor unit is to be installed in an

elevated position, be sure to secure its feet.

• An allowable length of the connecting pipe is up 15 m. (Refer to the table of TO CHARGE REFRIGERANT for detail.)

• An allowable height level is up to 8 m.

• A place where the drain water does not raise any

problem.

8-5-2.

Precautions about Installation in Regions with Snowfall and Cold Temperatures

• Do not use the supplied drain nipple for draining water. Drain the water from all the drain holes directly.

• To protect the outdoor unit from snow accumulation, install a holding frame and attach a snow protection Hood and plate.

* Do not use a double-stacked design.

FILE NO. SVM-10049

Strong

wind

Fig. 8-5-2

8-5-3. Refrigerant piping connection

1. Cut the pipe with a pipe cutter.

90°

Obliquity

Fig. 8-5-3

2. Insert a flare nut into the pipe, and flare the pipe.

• Projection margin in flaring : A (Unit : mm)

Die

Pipe

Fig. 8-5-4

Roughness Warp

Snow protection plate

Front

Anchor bolts

Snow protection hood

At least 50 cm

Snow accumulation line

Holding frame

Installation at least 50 cm above the snow accumulation line.

Fig. 8-5-1

CAUTION

1. Install the outdoor unit in a location where there are no obstructions near its air intake or air outlet.

2. When the outdoor unit is installed in a place that is always exposed to strong winds like on the coast or on a high story of a building, secure the normal fan operation using a duct or a wind shield.

3. Especially in windy arears, install the unit to prevent the admission of wind.

4. Installation in the following places may result in trouble.

Do not install the unit such places.

•

A place full of machine oil.

•

A saline-place such as the coast.

•

A place full of sulfide gas.

•

A place where high-frequency waves are likely to be generated, such as from audio equipment, welders, and medical equipment.

Rigid (Clutch type)

Outer dia. R410A Conventional

of copper pipe tool used tool used

6.35 0 to 0.5 1.0 to 1.5

12.70 0 to 0.5 1.0 to 1.5

Imperial (wing nut type, conventional tool)

Outer dia.

of copper pipe

R410A

6.35 1.5 to 2.0

12.70 2.0 to 2.5

Align the centers of the connecting pipes and tighten the flare nut as far as possible with your fingers. Then tighten the nut with a spanner and torque wrench as shown in the figure.

CAUTION

• Do not apply excess torque.

• Otherwise, the nut may crack depending on the

conditions.

- 41 -

Page 43

FILE NO. SVM-10049

(Unit : N.m)

Outer dia.

of copper pipe

Tightening torque

∅6.35 mm 16 to 18 (1.6 to 1.8 kgf·m)

∅12.70 mm 50 to 62 (5.0 to 6.2 kgf·m)

• Tightening torque of flare pipe connections

The operating pressure of R410A is higher than that of R22. (Approx. 1.6 times). It is therefore necessary to firmly tighten the flare pipe connecting sections (which connect the indoor and outdoor units) up to the specified tightening torque. Incorrect connections may cause not only a gas leakage, but also damage to the refrigerant cycle.

Flare at indoor unit side

Flare at outdoor unit side

Fig. 8-5-5

Flare nutHalf union

Externally threaded side

Use a wrench to secure. Use a torque wrench to tighten.

Internally threaded side

Fig. 8-5-6

8-5-4. Evacuating

After the piping has been connected to the indoor unit, you can perform the air purge together at once.

AIR PURGE

Evacuate the air in the connecting pipes and in the indoor unit using a vacuum pump. Do not use the refrigerant in the outdoor unit. For details, see the manual of the vacuum pump.

Be sure to use a vacuum pump with counter-flow prevention function so that inside oil of the pump does not flow backward into pipes of the air conditioner when the pump stops. (If oil inside of the vacuum pump enters into the air conditioner, which use R410A, refrigeration cycle trouble may result.)

1. Connect the charge hose from the manifold valve to

the service port of the gas side packed valve.

2. Connect the charge hose to the port of the vacuum

pump.

3. Open fully the low pressure side handle of the

gauge manifold valve.

4. Operate the vacuum pump to start evacuating.

Perform evacuating for about 15 minutes if the piping length is 20 meters. (15 minutes for 20 meters) (assuming a pump capacity of 27 liters per minute. Then confirm that the compound pressure gauge reading is –101 kPa (–76 cmHg).

5. Close the low pressure side valve handle of gauge

manifold.

6. Open fully the valve stem of the packed valves

(both side of Gas and Liquid).

7. Remove the charging hose from the service port.

8. Securely tighten the caps on the packed valves.

CAUTION

•

KEEP IMPORTANT 5 POINTS FOR PIPING WORK

(1) Take away dust and moisture (Inside of the

connecting pipes.)

(2) Tight connection (between pipes and unit) (3) Evacuate the air in the connecting pipes using

VACUUM PUMP.

(4) Check gas leak (connected points)

(5) Be save to fully open the packed valves

before operation.

-101 kPa (-76 cmHg)

Handle Lo

Charge hose (For R410A only)

- 42 -

Pressure gaugeCompound pressure gauge

Manifold valve

Handle Hi (Keep full closed)

Charge hose (For R410A only)

Vacuum pump adapter for counter-flow prevention

(For R410A only)

Vacuum

pump

Connecting pipe

Packed valve at gas side

Packed valve at liquid side

Service port (Valve core (Setting pin))

Fig. 8-5-7

Page 44

FILE NO. SVM-10049

TO CHARGE REFRIGERANT

Refrigerant

No need to charge extra refrigerant

Need to charge Over 15 m up to extra refrigerant 25 m (30 g/m)

24 class

15 m or less

• Open the valve stem all the way out; but do not try

to open it beyond the stopper.

• Securely tighten the valve stem cap with torque in

the following table:

Gas side Tightening torque A

Gas side 50 to 62 N·m 4 mm (∅12.70 mm) (5.0 to 6.2 kgf·m)

Liquid side 16 to 18 N·m Same as (∅6.35 mm) (1.6 to 1.8 kgf·m) Gas side

Service port

9 to 10 N·m (0.9 to 1.0 kgf·m)

8-5-6. Electrical Work

1. The supply voltage must be the same as the rated voltage of the air conditiner.

2. Prepare the power source for exclusive use with the air conditioner.

Terminal block

Earth line

Cord clamp

Power supply cord Connecting cable

Terminal screw

Screw

Cord clamp

Round type terminal

Power supply cord Connecting cable

Round type

terminal

100

Earth line

Fig. 8-5-8

Cable tie

130

• Hexagonel wrench : A (Unit : mm)

Hexagonal wrench is required.

Fig. 8-5-7

8-5-5. Wiring connection

1. Remove the valve cover from the outdoor unit.

2. Connect the connecting cable to the terminal as identified with their respective matched numbers on the terminal block of indoor and outdoor unit.

3. When connecting the connecting cable to the outdoor unit terminal, make a loop as shown in the installation diagram of indoor and outdoor unit, to prevent water coming in the outdoor unit.

4. Insulate the unused cords (conductors) from any water coming in the outdoor unit. Proceed them so that they do not touch any electrical or metal parts.

5. Secure the power cord and the connecting cable with the crd clamp.

6. Attach the electric parts cover and the valve cover on the outdoor unit.

Power supply cord

Connecting cable

Protective bush

Fig. 8-5-9

Model

Power source 220~240V 50Hz Single phase Maximum running current 15A 14A Plug socket & fuse rating

Power cord

RAS-24SKHP-ES2

20A 20A

(H07RN-F or 60245 IEC66)

4 mm or 3.5 mm2 (AWG-12)

RAS-24SKP-ES2

CAUTION

• Wrong wiring connection may cause some electrical

• Be sure to comply with local rule on running the wire

from indoor unit to outdoor unit (size of wire and wiring method, etc.).

• Every wire must be connected firmly.

• If incrrect or incomplete wiring is carried out, it will

cause an ignition or smoke.

• Prepare the power supply for exclusive use with the

air conditioner.

• This product can be connected to the mains.

Connection to fixed wiring : A switch which disconnects all poles and has a contact separation of at least 3 mm must be incorporated in the fixed wiring.

− 43 −

NOTE: Connecting cable

• Wire type : More than 1.5 mm (H07RN-F or 60245 IEC66) or 1.3 mm (AWG-16)

Page 45

FILE NO. SVM-10046

8-5-7. Refrigerant Piping

< Knockout of Pipe Cover >

Knockout procedure

Rear direction

Pipe cover

PLATE-TRANSPORTATION

Should be take off and

•

Fig. 8-5-10

The indoor/outdoor connection pipes can be connected in

• rear direction. Take off the knockout part of the pipe cover through which pipes.

•

Detach the pipe cover and tap on the knockout section a few times with the shank of a screwdriver. A knockout hole can easily be punched.

After punching out the knockout hole, remove burrs from

• the hole and then install the supplied protective bush and guard material around the passage hole to protect wires and pipes. Be sure to attach the pipe covers after pipes have been connected. Cut the slits under the pipe covers to facilitate the installation. After connecting the pipes, be sure to mount the pipe cover. The pipe cover is easily mounted by cutting off the slit at the lower part of the pipe cover.

no need to fix.

8-6. Others

8-6-1. Gas Leak Test

Flare nut connections (Indoor unit)

Flare nut connections (Outdoor unit)

Service port cap connection

Fig. 8-6-1

•

Check the flare nut connections, valve stem cap

connections and service dia.: 16mm) sold on the market. Also seal the screws securely with port cap connection for gas leak with a leak detection or soap water.

•

When water is to be drained through the drain hose, attach the following drain nipple and waterproof rubber cap, and use the drain hose (Inner silicone material, etc., to prevent water from leaking. Some conditions may cause dewing or dripping of water.

•

When draining completely simultaneous is needed, use a drain pan.

Valve stem cap connection

* Be sure to wear heavy work gloves while working.

Supplied protective bush

Fig. 8-5-11

Fig. 8-5-12

Supplied passage hole guard material

Attach the guard material securely so that it dose not come loose.

Drain nipple Waterproof rubber cap

Waterproof rubber cap

Base-plate

Drain nipple

(For Heat pump model)

Fig. 8-6-2

For Reference If a heating operation is to be continuously performed for a long

time under the condition that the temperature is 0°C or lower, may cause difficulty in draining defrosted water due to the bottom plate freezing and may affected to the cabinet or fan. It is recommended to install an anti-freeze heater locally in order to safely install the air conditioner. For details, contact the dealer.

– 44 –

Page 46

FILE NO. SVM-10049

8-6-2. Test Operation

To switch the TEST RUN (COOL) mode, press RESET button for 10 seconds (The beeper will make a short beep).

Hi P OW E R F ILT E R P AP TIM ER O P ER A TIO N

RESET

RESET button

Fig. 8-6-3

8-6-3. Auto Restart Setting

This product is designed so that, after a power failure, it can restart automatically in the same operating mode as before the power failure.

Information

The product was shipped with Auto Restart

function in the OFF position. Turn it ON as required.

8-6-4. Remote Controller A or B Selection

Setting

When two indoor units are installed in the separated rooms, it is not necessary to change the selector switches.

• When two indoor units are installed in the same room or

adjacent two rooms, if operating a unit, two units may receive the remote control signal simultaneously and operate. In this case, the operation can be preserved by setting either one

indoor unit or remote control to B setting. (Both are set to A

setting in factory shipment.)

• The remote control signal is not received when the settings of

indoor unit and remote control are different.

• There is no relation between A setting/B setting and A room/B

room when connecting the piping and cables.

To separate using of remote control for each indoor unit in case

of 2 air conditioner are installed nearly. the remote control signal simultaneously and operate. In this

Remote Control B Setup.

1. Press RESET button on the indoor unit to turn the air conditioner ON. 2

. Point the remote control at the indoor unit.

3. Push and hold CHK button on the Remote Control by the tip of the pencil. "00" will be shown on the display.

4. Press MODE during pushing CHK , "B" will show on the display and"00" will disappear and the air conditioner will turn OFF. The Remote Control B is memorized.

Note : 1. Repeat above step to reset Remote Control to be A.

. Remote Control A have not "A" display.

3. Detault setting of Remote Control from factory is A.

1. Press and hold the RESET button on the indoor unit for 3 seconds to set the operation. (3 beep sound and

OPERATION lamp blink 5 time/sec for 5 seconds)

2. Press and hold the RESET button on the indoor unit for 3 seconds to cancel the operation. (3 beep sound but

OPERATION lamp does not blink)

• In case of ON timer or OFF timer are set, AUTO RESTART

OPERATION does not activate.

“B” Display “00” Display

PRESET

ONE-TOUCH

QUIET

FIX Hi-POWER ECO

SWING

TIMER

ON OFF

SLEEP

●

FILTER ● CLOCK

CHK

Fig. 8-6-4

FAN

MODE

COMFORT

SELECT

CLR

SET

●

− 45 −

Page 47

9. TROUBLESHOOTING CHART

FILE NO. SVM-10049

9-1. Tr oub leshooting Pr ocedure :

9-2-2. Incorrect cable connection between Indoor

and outdoor units

Follow the details of 9-2. Basic Check Items. If there is no trouble corresponding to 9-2, check whether or not there are faulty parts following

9-4. Self-Diagnosis by Remote Control.

9-2. Basic Check Items

The indoor unit is connected to the outdoor unit with 4 cables. Check that the indoor and outdoor units have been properly connected with terminals assigned the same numbers. If the connectors are not properly connected, the outdoor unit will not operate normally, or OPERATION lamp and TIMER lamp will blink (5 Hz).

9-2-1. Power supply voltage

The line voltage must be AC 220 – 240 V. If it is not within this range, the air conditioner may not operate normally.

9-2-3. Program control

The microcontroller operates as shown in Table 9-2-1 to control the air conditioner. If there are any operational problems, check whether or not the problems correspond to Table 9-2-1. If they correspond to the Table, they are not problems with the air conditioner, but they are indispensable operations to control and maintain the air conditioner properly.

Table 9-2-1

No. Operation of air conditioner Descriptions

1 When the main power supply is turned

on, the OPERATION lamp on the indoor unit blinks.

2 The indoor fan motor speed does not

change in the Dry operation.

3 The compressor is not turned off even

though the room temperature is in the range that the compressor is turned off.

4 The compressor is not turned on and

off even though the thermo control is operated in the Dry operation.

*5 The PRE-DEF. lamp is indicated when

the Heating operation starts.

The OPERATION lamp blinks to indicate that power is turned on. If the [ ] button is pressed, the lamp stops blinking.

The indoor fan motor speed is automatically controlled in the Dry operation.

The compressor has a function that it is not turned off for 3 minutes after it is turned on even though the room temperature is in the range that the compressor is turned off.

In the Dry operation, the compressor is turned on and off automatically at the regular intervals, independent of the thermo control.

The PRE-DEF. lamp is indicated during the Defrosting operation or if the indoor heat exchanger temperature is low when the Heating operation starts. At this time, the indoor fan motor stops to prevent cold air from blowing in the room.

*6 The outdoor fan motor stops in the

Heating operation.

7 The compressor is not turned on even

though the room temperature is in the range that the compressor is turned on.

8 The operation mode changes in the

Automatic operation.

9 The Fan only operation continues in the

Automatic operation.

10 The ECO operation or Hi-POWER

operation does not work.

11 When [Hi POWER] button is pressed,

the display on the remote control does not change at all.

Note *5 and *6 are for Heat pump model :

When the indoor heat exchanger temperature is high, the outdoor fan motor is stopped by the high-temperature limit control operation.

The compressor is not turned on in the restart delay timer (3-minutes timer) operation. It is also not turned on after the power supply is turned on because of this timer operation.

In Automatic operation, the room temperature is detected all time for control fan speed and the operation mode is changed every 15 minutes according to difference between the room temperature and the preset temperature.

When the room temperature is in the range (Preset temperature ± 1°C), the Fan only operation is selected.

These operations do not work when the unit is in the Dry operation or Fan only operation.

The display on the remote control does not change when [Hi POWER] button is pressed. However the microcontroller gives commands to change the preset temperature and air flow level.

– 46 –

Page 48

FILE NO. SVM-10049

9-3. Primary Judgement

9-3-1. 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 outlet of the

indoor heat exchanger by the indoor temperature sensor

• Temperature setting of the indoor heat exchanger by

the heat exchanger sensor

• Louver motor control

• Indoor fan motor operation control

• LED display control

• Transferring of operation commands to the outdoor

unit

Table 9-3-1

Lamps Self-diagnosis

A OPERATION lamp is blinking. (1 Hz) B OPERATION lamp is blinking. (5 Hz) C OPERATION lamp is blinking. (5 Hz) D OPERATION lamp is blinking. (5 Hz) E OPERATION lamp is blinking. (5 Hz) F OPERATION and TIMER lamps are blinking.

(5 Hz)

9-3-2. Failure diagnosis

The indoor unit diagnoses the operation condition and indicates the information of the self-diagnosis with the lamps on the display panel of the indoor unit.

Power failure (when the power supply is turning on) Thermo sensor (TA) short or break Heat exchanger sensor (TC) short or break Indoor fan motor lock or failure Indoor P.C. board failure Wrong wiring of connecting cable

G OPERATION, TIMER and PRE-DEF.

(or FAN ONLY for cooling only model) lamps are blinking.

Table 9-3-2 Diagnosis by detective operation

Symptom Check Primary judgement

The remote control does not work.

The outdoor fan does not rotate.

Turn off the power supply once, then turn it on. Try to operate the remote control.

The compressor operates.

The compressor does not operate.

Cycle failure

• Gas shortage or other refrigerant cycle trouble

• Heat exchanger sensor open, break or short

• Overload relay or thermostat trouble of compressor

The remote control still does not work.

The remote control works.

The indoor unit (and/or remote control) is/are defective.

OK.

The outdoor unit (Outdoor fan motor) is defective.

An internal part of the compressor or P.C. board is defective.

– 47 –

Page 49

FILE NO. SVM-10049

9-4. Self-Diagnosis by Remote Controller (Check Code)

1. If the lamps are indicated as shown B to E in Table 9-3-1, execute the self-diagnosis by the remote controller.

2. When the remote controller is set to the service mode, the indoor controller diagnoses the operation condition and indicates the information of the self-diagnosis on the display of the remote controller with the check codes. If a fault is detected, all lamps on the indoor unit will flash at 5Hz and it will beep for 10 seconds (Beep, Beep, Beep ... ). The timer lamp usually flashes (5Hz) during self-diagnosis.

9-4-1. How to Use Remote Controller in Service Mode

Press [CHECK] button with a tip of pencil to set the remote controller to the service mode.

• “ ” is indicated on the display of the remote controller.

PR E S E T

ON E- TOU CH

QU IE T

S WIN G

TI ME R

SL E E P

C HK

TOSHIBA

FA N

TE MP

TEMP

MOD E

C OMF OR T

S LE E P

FI X Hi -PO WE R E CO

OF F

FI LT E R

C LO CK

Press [ON ] or [OFF ] button

If there is no fault with a code, the indoor unit will beep once (Beep) and the display of the remote controller will change as follows :

• • •

• The TIMER indicator of the indoor unit flashes continuously. (5 times per 1 sec.)

• Check the unit with all 52 check codes ( to ) as shown in Table-11-4-1.

• Press [ON ] or [OFF ] button to change the check code backward.

CL R

SE T

If there is a fault, the indoor unit will beep for 10 seconds (Beep, Beep, Beep...).

Note the check code on the display of the remote controller.

• 2-digits alphanumeric will be indicated on the display.

• All indicators on the indoor unit will flash. (5 times per 1 sec.)

Alphanumeric characters are used for the check codes. is 5. is 6. is A. is B. is C. is D.

Press [CLR] button. After service finish for clear

service code in memory.

• "7F" is indicated on the display of the remote

control.

Press [ ] button to release the service mode.

• The display of the remote controller returns to as it

was before service mode was engaged.

Fig. 9-4-1

– 48 –

Page 50

Table 9-4-1

Block level Diagnosis function

Check

code code status

Block

Indoor P.C. board

Cable connection

Outdoor P.C. board

Other parts (including compressor)

Check

Symptom

The indoor thermo sensor (TA) is defective. Disconnection or short-circuit

The indoor heat exchanger sensor (TC) is defective. Disconnection or short-circuit

The indoor fan motor or its circuit is defective.

The part other than the above parts on the indoor P.C. board is defective. EEPROM access error

IOL operation

The serial signals can not be transmitted and received between indoor and outdoor units.

The crossover wire is

•

connected wrongly. The serial signal transmitting

•

circuit on the outdoor P.C. board is defective. The serial signal receiving

•

circuit on the indoor P.C. board is defective.

The operation command signals are not transmitted from the indoor unit to the outdoor unit.

The outdoor thermo sensor (TE) is defective. Disconnection or short-circuit

The outdoor heat exchanger (TD) sensor is defective. Disconnection or short-circuit

The reply serial signal has been transmitted when starting the unit, but stops being transmitted shortly after.

1. Compressor thermo operation

•

Gas shortage

• Gas leak

2. Instantaneous power failure

The discharge temperature is over 120°C.

The IOL operation is defective.

Unit

Operation continues.

All off

Operation continues.

All off

Operation continues.

All off

Operation continues.

All off

Condition

The lamp on the indoor unit blinks when error is defected.

The lamp on the indoor unit blinks when error is defected. And it returns to the normal condition when recovering from errors.

The lamp on the indoor unit blinks when error is defected.

The lamp on the indoor unit blinks when error is defected. And it returns to the normal condition when recovering from errors.

The lamp on the indoor unit blinks when error is defected.

The lamp on the indoor unit blinks when error is detected.

FILE NO. SVM-10049

Judgement and action

1. Check the indoor thermo sensor (TA).

2. Check the indoor P.C. board.

1. Check the indoor heat exchanger sensor (TC).

2. Check the indoor P.C. board.

1. Check the connector circuit of the indoor fan motor (CN10).

2. Check the indoor fan motor.

3. Check the indoor P.C. board.

1. Check the indoor P.C. board. (EEPROM and peripheral circuits)

Overload operation of refrigerating cycle

1. In the case of the outdoor unit not operating at all;

•

Check the crossover cable and connect it properly.

•

Check the outdoor P.C. board.

2. In the case of the outdoor unit operating normally;

•

Check whether or not both of serial LED (Green) and serial LED (Orange) is blinking. If the serial LED (Green) is not blinking, check the outdoor P.C. board. If the serial LED (Orange) is not blinking, check the indoor P.C. board.

If the operation command signals continue to be transmitted between 2 and 3 of the indoor terminal block, replace the outdoor P.C. board.

1. Check the outdoor thermo sensor (TE).

2. Check the outdoor P.C. board.

1. Check the outdoor heat exchanger sensor (TD).

2. Check the outdoor P.C. board.

1. Repeatedly turn the indoor unit on and off with the interval of approx. 10 to 40 minutes. (The check code is not indicated during operation.) And supply gas. (Check gas leak.)

2. The indoor unit operates normally during the check. If the reply serial signal continues to be transmitted between 2 and 3 of the indoor terminal block, replace the outdoor P.C. board. If the signal stops between them, replace the indoor P.C. board.

1. Check the heat exchanger sensor (TD).

2. Gas purging

When turning on the unit, the normal phase (RST) is detected but T-R waveform has not been detected for 120 seconds or more.

− 49 −

Page 51

9-5. How To Diagnose Faulty Parts

[04 Serial signal error] (Heat pump model)

FILE NO. SVM-10049

Operation

Check item

Conceivable principle cause

Measure

Does outdoor

unit operate?

YES

Are 1, 2 and 3 crossover

wires connected properly?

YES

Is connector

connected properly?

YES

Does LED (Orange) on

outdoor P.C. board blink?

YES

Does LED (Green) on

outdoor P.C. board blink?

YES

Outdoor P.C. board

is defective.

Indoor P.C. board

is defective.

Item by symptoms

Connect crossover

wires properly.

Connect connector

properly.

Replace

P.C. board.

Replace

P.C. board.

[08 Four-way valve error] (Heat pump model)

Does four-way valve

operate properly?

YES

Is TC sensor

resistance value

(10 kΩ at 25°C) normal?

YES

Does coil terminal have 220 − 240 V

in heating operation?

YES

Are circuit

wires normal?

YES

Is outdoor P.C. board

normal?

YES

Four-way valve

is defective.

Outdoor P.C. board

is defective.

(CN11 220 − 240 V)

Indoor P.C. board

is defective.

Replace

Four-way valve

Circuit check/modification

Replace

P.C. board.

Replace

P.C. board.

Replace TC sensor.

– 50 −

Page 52

[09 Other cycle error] (1) (Heat pump model)

FILE NO. SVM-10049

Replace TC

sensor.

YES

Connect TC

sensor properly.

Does compressor operate?

YES

Is compressor

turned off shortly?

Is TC sensor

resistance value

(10 kΩ at 25°C) normal?

YES

Is TC sensor

disconnected from

the sensing element?

YES

Does inner

overload relay

(in compressor)

operate?

Is circuit wiring

normal?

YES

Is outdoor P.C.

board normal?

YES

Check charged amount of refrigerant.

Check defective overload.

Check compressor.

Failure

Wiring check/modification

Outdoor P.C. board

is defective.

Indoor P.C. board

is defective.

Replace

compressor.

Replace

P.C. board.

Replace

P.C. board.

[09 Other cycle error] (2)

Connect

connector

properly.

Replace

condenser.

Replace

fan motor.

Is connector

connected properly?

Is condenser normal?

Is indoor fan

motor normal?

YES

Does indoor fan operate?

Are filters clogged?

Is TC sensor

resistance value

(10 kΩ at 25°C) normal?

Is charged amount

of refrigerant normal?

Is outside air

low load?

YES

Clean filters.

Replace

TC sensor.

Anti-freezing operation

Charge

refrigerant.

Anti-freezing operation

Indoor P.C. board

is defective.

– 51 −

Replacd

P.C. board.

Page 53

[0C Indoor TA sensor error]

FILE NO. SVM-10049

Is CN03 (TA sensor connector)

connected properly?

YES

Is TA sensor resistance value

(10 kΩ at 25°C) normal?

YES

[0d Indoor TC sensor error]

Is CN01 (TC sensor connector)

connected properly?

YES

Indoor P.C. board is defective.

Connect CN03 properly.

Replace T A sensor.

Replace P.C. board.

Connect CN01 properly.

Is TC sensor resistance value

(10 kΩ at 25°C) normal?

YES

Indoor P.C. board is defective.

[18 outdoor TE sensor error] (Heat pump model)

Is TE sensor connector

connected properly?

YES

Is TE sensor resistance value

(10 kΩ at 25°C) normal?

YES

Replace TC sensor.

Replace P.C. board.

Connect connector

properly.

Replace TE sensor.

Indoor P.C. board is defective.

– 52 −

Replace P.C. board.

Page 54

[19 outdoor TD sensor error] (Heat pump model)

FILE NO. SVM-10049

Is TD sensor

connected properly?

YES

Is TD sensor resistance value

(50 kΩ at 25°C) normal?

YES

Outdoor P.C. board is defective.

[1E Discharge temp. error] (Heat pump model)

Connect connector

properly.

Replace TD sensor.

Replace P.C. board.

Is protective

controller such as discharge

thermostat normal?

YES

Is charged amount

of refrigerant normal?

YES

Is overload relay normal?

Is TD sensor resistance value

(50 kΩ at 25°C) normal?

YES

NO NO

YES

Are wires connected

to connector properly?

Outdoor P.C. board is defective.

Connect wires to

connector properly.

Check and modify charged

amount of refrigerant.

Unit operates normally.

Replace TD sensor.

Replace P.C. board.

– 53 −

Page 55

9-6. Troubleshooting for Indoor unit

Operation

Measure

Item by symptoms

Check item

Conceivable principle

cause

9-6-1. Power can not be turned on. (The unit does not operate at all.)

(1) Is the supply voltage normal? (2) Is the connection to the AC output OK? (3) Is the fuse (F01) blown?

Turn off power supply once, and 5 second later, turn it

on again.

Is OPERATION

lamp blinking?

YES

Does

Is it possible to

turn on power

supply by

pressing

[ ]

button on remote

control?

YES

transmission

mark on

remote

control flash

normally, and

is its signal transmitted

properly?

YES

FILE NO. SVM-10049

Remote control is

defective.

Refer to 9-9

"Troubleshooting for

Remote Control."

Is DC 310-340V

across C03 ?

Are DC 12V

across C27 ?

YES

Turn off breaker once and turn it

removing motor.

Is fuse (F01)

of indoor

control board

blown?

Is voltage (DC

12V or 5V)

indicated on

rear of indoor

control board

normal?

on again after

YES

Part (C01, C02,

SG01, DB01, R09

R10, T01 and

IC10) are defective.

Are DC 12V

across C27 ?

Does the fan

motor

connector

between

and

short-

circuit?

Microconlroler

defective.

T01 or IC01 is

defective.

YES

Unit operates

normally.

Replace main P.C.

board.

YES

Replace motor.

– 54 −

Page 56

FILE NO. SVM-10049

9-6-2. Only indoor fan motor does not operate.

(1) Is it possible to detect the power supply voltage (200 – 240 V) between 1 and 2 on the terminal block? (2) Does the indoor fan motor operate in cooling operation?

(In heating operation, the indoor fan motor does not operate for approximately 5 minutes after it is turned on, to prevent a cold air from blowing in.)

[ ]

– 55 –

Page 57

9-6-3. Compressor does not operate. <Primary check>

(1) Is the preset temperature higher than the room temperature in cooling operation? (2) Is the crossover cable connected properly?

RAS-24SKP-ES2, RAS-24SKP-ES2(HK)

Turn on power supply.

FILE NO. SVM-10049

Does OPERATION

lamp blink?

YES

Does miniature relay RY03

switch on and off due to

temperature changes?

YES

Is it possible to detect AC

220 – 240V between 2

and 3 on terminal block?

YES

Are all of compressor cords normal?

YES

Is compressor motor winding

normal?

(Check winding resistor.)

YES

Is capacitor for compressor normal?

Is resistance value of thermo

sensor (TA) and heat ex-

changer sensor (TC) normal?

Microcomputer is defective.

Miniature relay RY03 is

defective.

Compressor is defective.

YES

Capacitor is defective.

Refer to 9-5-1 “Power

can not be turned on”.

Thermo sensor or

heat exchanger

sensor is defective.

Replace thermo sensor

or heat exchanger

sensor.

Replace P.C. board.

Rewire or replace

defective cords.

Replace compressor.

Replace capacitor.

YES

Is overload relay normal?

YES

Does compressor start?

YES

Does compressor stop after a while?

YES

Is gas quantity normal?

(Check gas pressure.)

YES

Compressor is defective.

YES

Replace P.C. board.

Overload relay is

defective.

Compressor is defective.

Gas shortage (Gas leak)

– 56 –

Replace overload relay.

Replace compressor.

Supply gas.

Page 58

RAS-24SKHP-ES2

AC 70-100V

FILE NO. SVM-10049

(CN06) of transformer?

Replace transformer

outdoor

P.C. board.

− 57 −

Page 59

YES

FILE NO. SVM-10049

Are all of compressor cords normal?

YES

Is compressor motor winding normal?

(Check winding resistor.)

YES

Is capacitor for compressor normal?

YES

Is overload relay normal?

YES

Does compressor start?

YES

Does compressor stop after a while?

YES

Is gas quantity normal?

(Check gas pressure.)

YES

Compressor is defective.

Capacitor is defective.

Overload relay is defective.

Compressor is defective.

Gas shortage (Gas leak)

Rewire or replace

defective cords.

Replace compressor.

Replace capacitor.

Replace overload relay.

Replace compressor.

Supply gas.

Compressor is defective.

YES

Replace compressor.

– 58 –

Page 60

FILE NO. SVM-10049

9-7.

r oubleshooting for 2Wiring (Interconnect cab1le and Serial Signal Wire)

9-7-1. Outdoor unit does not operate. <Inspection procedure>

(1) erIs the v (2)

Are signals from the indoor unit to the outdoor unit tr

oltage betw

een

and T of the indoor tererminal b

ansmitted correctly based upon the follo

loc

k vk arTied?

wing diag

am?

NOTE:

Measure the v

oltage f

or 2 min utes and 30 seconds after star

ting the unit.

RAS-24SKP-ES2, RAS-24SKP-ES2(HK)

minal b

loc

k on indoor side

Red

White

minal b

loc

ester

Normal condition : After start operated about 2 minutes and 30 seconds. Voltage between 2 and 3 of the

of the indoor's Terminal block should be equal AC 220 ~ 240V

AbnorTmal condition : Don't found voltage AC 220 ~ 240V from terminal block (0V)

RAS-24SKHP-ES2

Terminal block on indoor side

Nor

mal condition :

Red

White

Terminal block

Tester

oltage varied between AC70 ~ 100V

Abnormal condition : Voltage does not vary.

9-7-2. Outdoor unit stops a while after starting the unit.

<Confirmation procedure> Select one of 3 cases below and follow the procedure.

(1) The outdoor unit stops between 10 and 20 minutes passed after starting and it takes 10 minutes or more to

restart the unit.

Gas has a low circulation.

Measure gas pressure.

Compressor is turned off and on automatically by thermo sensor

(Heat pump Model) or thermostat (Cooling only Model).

Gas shortage Gas leak Pipe clogging

(2) The outdoor unit stops once, it would not operate until the power is turned on again.

Refer to 9-6-4 "Compressor does not operate"

(3) The outdoor unit stops between 10 minutes to 1 hour after starting and a check code is indicated on the

remote control. (Check code 03-1E : Refer to Table 9-4-1.)

− 59 −

Page 61

FILE NO. SVM-10049

9-8. Troubleshooting for P.C. board

9-8-1. How to check indoor P.C. board

(1) When removing the front panel and the P.C. board,

be sure to turn off the power supply.

(2) When removing the P.C. board, hold the edge of

the P.C. board and do not apply force to the parts.

(3) When connecting or disconnecting the connectors

on the P.C. board, hold the housing. Do not pull at

(1) If the P.C. board is defective , check for disconnec-

tion, burn or discoloration of the copper foil pattern

of the P.C. board.

(2) The P.C. board consists of the following 2 parts:

a. Main P.C. board parts.

Power relay, indoor fan motor drive circuit and control circuit, C.P.U. and peripheral circuits, buzzer drive circuit and buzzer.

b. Infrared rays parts:

Infrared rays receiving circuit

.C. board are defective.

er to Table 9-8-2.)

. .C. board is defective.

lead wires.

Check the defects of the P.C. board with Table 9-8-1.

RAS-24SKHP-ES2

Table 9-8-1 Inspection procedure

No. Procedure Check points Causes

1 Turn off the power supply and

remove the P.C. board assembly from electric parts base. Remove the connecting cables from the terminal block.

2 Remove the connector of the motor

and turn on the power supply. If OPERATION lamp blinks (once per second), it is not neccessary to check steps (1 to 3) in the right next column.

Check whether or not the fuse (F01) is blown.

Check power supply voltage;

1. Between CN30 and CN31 (220 − 240 V AC) : Except

2. Between + and − (DC310 − 340 V)

3. Between 12 V and GND

4. Between 5 V and GND

of C03

Impluse voltage was applied or the indoor fan motor short-circuited.

1. The terminal block or the crossover cable is connected wrongly.

2. The capacitor (C01 and C02 ) line filter (L01), resistor (R09), or the diode (DB01) is defective.

3. C27, T01 and IC01 are defective.

4. IC10, C30, C11 or T01 are defective.

3 Press [ ] button once

to start the unit. (Do not set the mode to Fan Only or On-Timer operation).

4 Shorten the line of the restart delay

timer and start unit.

5 Press [ ] button once

to start the unit.

• Shorten the time of the restart delay timer.

• Set the operation mode to COOL.

• Set the fan speed level to AUTO.

• Set the preset temperature must

lower than the room temperature. (The unit (compressor) operates continuously in the above condition.)

Check power supply voltage;

1. Between CN31 and CN23 (AC70 ~ 100V)

Check whether or not all lamps (OPERATION, TIMER, PRE.-DEF. (or FAN ONLY), FILTER and Hi Power) are indicated for 3 seconds and then

return to normal 3 seconds later.

1. Check whether or not the compressor operates.

2. Check whether or not the OPERATION lamp blinks.

IC03 or IC04 are defectice.

The lamps are defective or the housing assembly (CN13) is defective.

1. The temperature of the indoor heat exchanger is extremely low.

2. The connection of the heat exchanger sensor is loose. (The connector is disconnected.) (CN01)

3. The heat exchanger sensor and the P.C. board are defective. (Refer to Table 9-8-2.)

4. The main P.C. board is defective.

– 60 −

Page 62

FILE NO. SVM-10049

No. Procedure Check points Causes

6 If the above condition (No. 5) still

continues, start the unit in the following condition.

• Set the operation mode to HEAT.

• Set the preset temperature must

higher than room temperature.

7 Connect the motor connector to the

main P.C. borad and turn on the power supply. Start the unit in the following condition.

• Set the operation mode to FAN.

• Set the fan speed level to HIGH.

(The unit (compressor) operates continuously in the above codition.)

1. Check whether or not the compressor operates.

2. Check whether or not the OPERATION lamp blinks.

1. Check it is impossible to detect the voltage (DC 12 V) between

3 of the motor terminals.

2. The motor does not operate. (But it is possible to receive the signal from the remote control.)

3. The motor rotates but vibrates strongly.

and

1. The temperature of the indoor heat exchanger is extremely high.

2. The connector of the heat exchanger sensor short-circuited. (CN01)

3. The heat exchanger sensor and the P.C. board are defective. (Refer to Table 9-8-2.)

4. The main P.C. board is defective.

1. The indoor fan motor is defective. (Protected operation of P.C. board)

2. The connection of the motor connector is loose.

3. The P.C. board is defective.

– 61 −

Page 63

FILE NO. SVM-10049

Table 9-7-1 Inspection procedure

RAS-24SKP-ES2

No. Procedure Check points Causes

1 Turn off the power supply and

remove the P.C. board assembly from electric parts base. Remove the connecting cables from the terminal block.

Check whether or not the fuse (F01) is blown.

Impluse voltage was applied or the indoor fan motor short-circuited.

2 Remove the connector of the motor

and turn on the power supply. If OPERATION lamp blinks (once per second), it is not neccessary to check steps (1 to 3) in the right next column.

3 Press [ ] button once

to start the unit. (Do not set the mode to Fan Only or On-Timer operation).

4 Shorten the line of the restart delay

timer and start unit.

5 Press [ ] button once

to start the unit.

• Shorten the time of the restart delay timer.

• Set the operation mode to COOL.

• Set the fan speed level to AUTO.

• Set the preset temperature must

lower than the room temperature. (The unit (compressor) operates continuously in the above condition.)

Check power supply voltage;

1. Between CN30 and CN31 (220 − 240 V AC) : Except

2. Between + and − (DC310 − 340 V)

3. Between 12 V and GND

4. Between 5 V and GND

Check power supply voltage;

1. Between collector of Q08 and GND (for relay coil (DC12 V))

2. Between 2 and 3 of terminal block for connecting cable

Check whether or not all lamps (OPERATION, Auto restart, TIMER , FILTER and Hi-power) are indicated for 3 seconds and they return to normal 3 seconds later.

1. Check whether or not the

compressor operates.

2. Check whether or not the

OPERATION lamp blinks.

of C03

1. The terminal block or the crossover cable is connected wrongly.

2. The capacitor (C01 and C02) LINE filter (L01), resistor (R09, R10), or the diode (DB01) is defective.

3. C27, T01 and IC01 are defective.

4. IC10, C30, C11 or T01 are

defective.

1. The wire of the relay coil (RY03) comes down or the relay drive (Q08) is defective.

2. CN27 or RY03 is connected wrongly.

The lamps are defective or the housing assembly (CN13) is defective.

1. The temperature of the indoor heat exchanger is extremely low.

2. The connection of the heat exchanger sensor is loose. (The connector is disconnected.) (CN01)

3. The heat exchanger sensor and the P.C. board are defective. (Refer to Table 9-7-2.)

4. The main P.C. board is defective.

6 Connect the motor connector to the

main P.C. borad and turn on the power supply. Start the unit in the following condition.

• Set the operation mode to FAN.

• Set the fan speed level to HIGH.

(The unit (compressor) operates continuously in the above codition.)

1. Check it is impossible to detect the voltage (DC 12 V) between and6

3 of the motor terminals.

2. The motor does not operate. (But it is possible to receive the signal from the remote control.)

3. The motor rotates but vibrates strongly.

– 62 –

1. The indoor fan motor is defective. (Protected operation of P.C. board)

2. The connection of the motor connector is loose.

3. The P.C. board is defective.

Page 64

FILE NO. SVM-09036

Table 9-

-2. Approximate resistance value of thermo sensor

Temperature 0°C10°C20°C25°C30°C

Resistance value 33.8 20.35 12.59 10.00 7.99

9-8-2. How to shorten time of restart delay timer

1 Press [SET] button while pressing [CHECK] button

with a tip of a pencil.

2 Then press [

indoor unit.

] button to transmit the signal to the

PRESET

ONE-TOUCH

QUIET

SWING

TIMER

CHK

TEMP

FAN

MODE

COMFORT

SLEEP

FIX Hi-POWER ECO

OFF

FILTER

CLOCK

CLR

SET

(kΩ)

-3. How to set/cancel self cleaning function

The self cleaning function is set from a factory. To cancel this function, should keep press the RESET button on Indoor unit for 20 seconds till can hear the long combination sound and repeat the same procedure when need to set.

– 63 −

Page 65

FILE NO. SVM-10049

9-9. Troubleshooting for Remote Control

Check that A or B selected on the main unit is matched with A or B selected on the remote controller.

Is there direct

sunlight on the

receptor of the air

conditioner?

YES

Is there any

thyristor

fluorescent light

nearly?

YES

NO NO

Push the [ ] button.

Does the transmission

indicator blink?

Is operation

possible when the

transmitter is moved

nearer to the infrared

signal receiver of the

air conditioner?

YES

Battery life

There is no beep from the indoor unit The OPERATION lamp of the

air conditioner main unit does not light

Reset the remote control

by take off batteries

Push the [ ]

button

Avoid direct

sunlight.

Keep the air

conditioner away

from thyristor

fluorescent light.

Is operation possible

when setting the temporary switch of the air conditioner main unit

to “TEST RUN” or

“TEMPORARY AUTO”?

YES

Can any signal tone

be heard in a transistor

radio when transmitting

within 5 cm distance

from the radio?

YES

P.C. board is failure.

Replace

P.C. board

Replace the

batteries

indicator light?

Normal

Dose the

transmission

YES

Is there any

beep and

operation?

YES

Remote control

is failure.

Replace remote

control.

Note : Atter batteries replacement, short circuit the metal terminal

at the side of the battery compartment.

– 64 –

Page 66

FILE NO. SVM-10049

10. HOW TO REPLACE THE MAIN PARTS

WARNING

• Since high voltages pass through the electrical parts, turn off the power without fail before proceeding with the repairs.

Electric shocks may occur if the power plug is not disconnected.

• After the repairs have been completed (after the front panel and cabinet have been installed), perform a test run, and check for smoking, unusual sounds and other abnormalities.

If this check is omitted, a fire and/or electric shocks may occur. Before proceeding with the test run, install the front panel and cabinet.

• Ensure that the following steps are taken when doing repairs on the refrigerating cycle.

1. Do not allow any naked flames in the surrounding area.

If a gas stove or other appliance is being used, extinguish the flames before proceeding. If the flames are not extinguished, they may ignite any oil mixed with the refrigerant gas.

2. Do not use welding equipment in an airtight room.

Carbon monoxide poisoning may result if the room is not properly ventilated.

3. Do not bring welding equipment near flammable objects.

Flames from the equipment may cause the flammable objects to catch fire.

• If keeping the power on is absolutely unavoidable while doing a job such as inspecting the cir-

cuitry, wear rubber gloves to avoid contact with the live parts.

Electric shocks may be received if the live parts are touched. High-voltage circuits are contained inside this unit.

Proceed very carefully when conducting checks since directly touching the parts on the control circuit board may result in electric shocks.

10-1. Indoor Unit

No.Part name

Front panel

Procedures

1) Stop operation of the air conditioner and turn off its main power supply.

2) Open the air inlet grille, push the arm toward the outside, and remove the grille.

3) Remove the left and right air filters.

Remarks

– 65 –

Page 67

FILE NO. SVM-10049

No.Part name

Front panel

Procedures

4) Press "PUSH" part under the front panel and remove hooks of the front panel from the installation plate.

5) Remove the front panel fixing screws. (4 pcs.)

6) Take off four hooks of panel from rear side.

Remarks

Installation plate

Front panel

Press

4 Screw

2 Screws

Three hooks

Four hooks

1) Press three center positions and two lower center positions of the air outlet, and then hang the hanging hooks (4 pcs.) at the top side of the front panel to the rear plate.

2) Tighten four screws.

• Incomplete hanging or incomplete pressing may cause a dewdrops or generation

of a fluttering sound.

– 66 –

Page 68

FILE NO. SVM-10049

No. Part name

Electric parts



box assembly

Procedures Remarks

1) Remove screw of earth lead attached to the end plate of the evaporator.

2) Remove the lead wire cover, and remove connector for the fan motor and connector for the louver motor from the electric parts box assembly.

3) Pull out TC sensor from sensor holder of the evaporator.

4) Disengage the display unit by simply pushing at the top of the display unit.

) Remove the fixing screw that secures the

conduit mount, electric parts box assembly,

LED assembly and remove the assembly.

Electric art

box cover's screw

1) Hook the top part of the electric parts box assembly onto the claws on the back body, and secure it using the fixing screw. Now attach the display unit. Connect the connectors for the fan motor and louver motor.

2) Secure the grounding wire using the fixing screw. Insert the TC sensor into the sensor holder.

* Be absolutely sure to loop the grounding

wire and TC sensor leads once at the bottom.

TC sensorEarth Screw

Fan motor connector

Louver motor

connector

Fixing screw

LED assembly

Loof the qrunding wire

– 67 –

Page 69

FILE NO. SVM-10049

No. Part name

Horizontal louver





Evaporator (Heat exchanger)

Procedures

Remarks

1) Remove shaft of the horizontal louver from the back body. (First remove the left shaft, and then remove other shafts while sliding the horizontal louver leftward.)

1) Follow to the procedure in the item .



2) Remove the pipe holder from the rear side of the main unit. (Figure 1)

3) Remove two fixing screws at the left side of the end plate of the heat exchanger.

Pipe hoolder

Screw

(Figure 1)

Screw

(Figure 2)

– 68 –

(Figure 3)

Page 70

No. Pa rt name Procedures

Evaporator (Heat exchanger)

4) Remove three fixing screw at the right side of the heat exchanger, and separate the heat exchanger from the back body.

(Figure 4, 5)

FILE NO. SVM-10049

One screw

(Figure 4)

One screw

(Figure 5)



Bearing

1) Follow to the procedure in the item .



2) Remove the two screws used to secure the bearing base.

3) Remove the bearing base.

• If the bearing is out from the housing, push it

into the specified position and then incorporate it in the main body.

Two screws

Two

screws

Bearing

Bearing base

– 69 –

Bearing

Page 71

FILE NO. SVM-10049

No. Part name

Fan motor

Procedures

1) Follow to the procedure till item .



2) Loosen the set screw of the cross flow fan.

3) Remove two fixing screws of the motor cover

and them remove the motor cover.

4) Remove two more fixing screws of the motor band and remove the motor band.

Remarks

Set screw

5) Pull the fan motor outward.

Two screws on

motor cover

Two screws on

motor band

– 70 –

Page 72

FILE NO. SVM-10049

No. Part name

Cross flow fan

Procedures

1) To incorporate the fan motor incorporate the

motor into the position in the following figure, and then install the fan motor.

• Install the cross flow fan so that the right end of the 1st joint from the right of the cross flow fan is set keeping 5.0 mm from closed wall of the main unit.

• Holding the set screw, install the cross flow fan so that flat area on shaft of the fan motor comes to the mounting hole of the set screw.

• Perform positioning of the fan motor as follows:

• When assembling the fan motor, the fan motor must be installed in such a way that the fan motor leads will be taken out is positioned at the bottom front.

• After assembling the two hooking claws of the motor band (right) into the main body, position the fan motor, insert it, and then secure the motor band (right) using the two fixing screws.

Remarks

– 71 –

Page 73

FILE NO. SVM-10046

10-2. Outdoor Unit

No. Part name Procedures Remarks

1 Common

procedure

2 Running

capacitor for compressor

3 Running

capacitor for fan motor

Magnetic contactor

5 Spark killer

(Cooling model)

Transformer (Heat pump model)

P.C. Board (Heat pump model)

1) Stop the operation of the air conditioner and turn off its main power supply or remove the power supply cord.

2) Remove the Panel front (2 screws ∅4 x 10L)

Pressing downward and pulling out toward you.

3) Remove 2 Cord clamps (4 screws ∅4 x 16L) and

and connecting cable after removing 5 screws on the terminal block and 1 ground screw on the electrical parts base.