Toshiba RAS-24NKHD-E5, RAS-24NAH-E, RAS-18NKDX5-T, RAS-18N2AX-T, RAS-24NKDX5-T Service Manual

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FILE NO. SVM-06010

SERVICE MANUAL

AIR CONDITIONER

SPLIT WALL TYPE

June, 2006

RAS-24NKHD-E5 / RAS-24NAH-E RAS-18NKDX5-T / RAS-18N2AX-T RAS-24NKDX5-T / RAS-24N2AX-T

FILE NO. SVM-06010

CONTENTS

1. SPECIFICATIONS

2. CONSTRUCTION VIEWS

2-1 Indoor Unit 2-2 Outdoor Unit (24 Class)

2-3 Outdoor Unit (18 Class)

3. WIRING DIAGRAM

3-1 RAS-24NKHD-E5 / RAS-24N2AH-E 3-2 RAS-24NKDX5-T / RAS-24N2AX-T 3-3 RAS-18NKDX5-T / RAS-18N2AX-T

4. SPECIFICATION OF ELECTRICAL PARTS

4-1 Indoor Unit (RAS-24NKHD-E5) 4-2 Outdoor Unit (RAS-24NAH-E) 4-3 Indoor Unit (RAS-18,24NKDX5-T) 4-4 Outdoor Unit (RAS-18N2AX-T)

5. REFRIGERATION CYCLE DIAGRAM

5-1 RAS-24NKHD-E5 / RAS-24NAH-E 5-2 RAS-24NKDX5-T / RAS-24N2AX-T 5-3 RAS-18NKDX5-T / RAS-18N2AX-T

6. CONTROL BLOCK DIAGRAM

6-1 RAS-24NKHD-E5 6-2 RAS-18, 24NKDX5-T

− 1 −

4-4 Outdoor Unit (RAS-24N2AX-T)

7-10 QUIET Mode

7. OPERA

7-11 COMFORT SLEEP mode

TION DESCRIPTION

7-1 Outline of Air Conditioner Control 7-2 Description of Operation Circuit 7-3 Hi POWER Mode 7-4 High-Temperature Limit Control 7-5 Low-Temperature Limit Control 7-6 Defrosting Operation 7-7 Auto Restart Function 7-8 Filter Check Lamp 7-9 Self-Cleaning function

− 2 −

FILE NO. SVM-06010

8. INSTALLATION PROCEDURE

8-1 Safety Cautions 8-2 Installation Diagram of Indoor and Outdoor Units 8-3 Installation 8-4 Indoor Unit 8-5 Outdoor Unit 8-6 How to Set Remote Control Selector Switch

8-7 Others

9. TROUBLESHOOTING CHART

9-1 Troubleshooting Procedure 9-2 Basic Check Items 9-3 Primary Judgement 9-4 Self-Diagnosis by Remote Control (Check Code) 9-5 How to Diagnose Faulty Part 9-6 Troubleshooting for Indoor Unit 9-7 Troubleshooting for Wiring (Interconnect cable and Serial Signal Wire) 9-8 Troubleshooting for P.C. Board 9-9 Troubleshooting for Remote Control

10. PARTS REPLACEMENT

10-1 Indoor Unit 10-2 Outdoor Unit

11. EXPLODED VIEWS AND PARTS LIST

11-1 Indoor Unit (E - Parts Assy) 11-2 Indoor Unit 11-3 Outdoor Unit (RAS-24N2AH-E) 11-4 Outdoor Unit (RAS-24N2AX-T) 11-5 Outdoor Unit (RAS-18N2AX-T)

FILE NO. SVM-06010

RAS-24NKHD-E5

RAS-18NKDX5-T

ITEM Cooling Heating Cooling Cooling

RAS-24NKDX5-T

RAS-24NAH-E

Capacity kW

220 V 240 V 220 V 240 V

220 V 220 V

RAS-18N2AX-T

RAS-24N2AX-T

6.30 6.30 6.60 6.70 5.10 6.40

Phase 1∅

Power source V 220 − 240

Hz 50

Power consumption W

2430 2510 2310 2410

1560

2250

Power factor % 96 91 94 88

Running current A

0.3/7.2

0.3/10.50

Indoor/Outdoor

11.2 11.2 10.9 11.10

Starting current A

Moisture removal lit/h

2.5

Noise

Indoor (H/M/L) dB Outdoor (220 − 240 V) dB 56-57 57-58 56

Refrigerant

Name of refrigerant R22 Rated amount kg 2.00

Refrigerant control Capillary tube

Gas side size

∅15.88

Connection type Flare connection Liquid side size

∅6.35 Interconnection Connection type Flare connection pipe Maximum length

15*

(One way)

25*

Maximum height

INDOOR UNIT RAS-24NKHD-E5 RAS-18NKDX5-T RAS-24NKDX5-T

Height mm 298

Dimensions Width mm 998

Depth mm 220 Net weight kg 13 Evaporator type Finned tube Indoor fan type Cross flow fan

High fan m3/h 1050 1050

1050

Air volume Medium fan m3/h 830 900

975

Low fan m3/h 625 667 667 Fan motor output W 30 Air filter Honeycomb woven filter with PP frame

OUTDOOR UNIT RAS-24NAH-E RAS-18N2AX-T RAS-24N2AX-T

Height mm 715 Dimensions Width mm 780

Depth mm 290 Net weight kg 56

Condenser type Finned tube Outdoor fan type Propeller fan

W Safety device IOL, Td Sensor IOL Louver type Automatic louver Usable outdoor temperature range °C 15 ~ 43 −10 ~ 24

1800

MODEL

0.3/

0.3/ 0.3/

48/46/44/41/39

2440

220

48/45/42/38/33

1.50

20*

790 543

715 780

290

2400

1700

21 ~ 43

2.7

53/50/47/43/40

1.68

25*

1200

1800

PH400X3CS-4KT1

PH290X2C-4FT1

PH400X3CS-4KT1

1. SPECIFICATIONS

− 3 −

2550

2440

2550

FILE NO. SVM-06010

Note : 1

• Capacity is based on the following temperature conditions.

Note : 2

• Charge refrigerant according to the table below.

Temperature

Condition

JIS B8615-1

Cooling Heating

Indoor unit inlet air temperature

(DB) 27°C 20°C

(WB) 19°C 15°C

Outdoor unit inlet air temperature

(DB) 35°C 7°C

(WB) 24°C 6°C

Refrigerant

RAS-24NKHD-E5 / RAS-24NAH-E

RAS-18NKDX5-T / RAS-18N2AX-T

RAS-24NKDX5-T / RAS-24N2AX-T

*1 No need to charge

15 m or less 15 m or less

extra refrigerant

*2 Need to charge

Over 15 m up to 25 m (30 g/m) Over 15 m up to 20 m (20 g/m)

extra refrigerant

− 4 −

– 5 –

FILE NO. SVM-06010

2. CONSTRUCTION VIEWS

2-1. Indoor Unit

Air outlet

Plasma air purifierHeat exchangerAir filter

Air inlet

998

220

Knock out system

163

Wireless remote control

Connection pipe (0.49 m) (Flare ∅6.35)

Drain hose (0.54 m)

90 or more

Minimum distance

to ceiling

100

450

100

∅

998

298

763.5

5555

∅

(For stud bolt ∅6) (For stud bolt ∅8 - ∅ 10)

Installation Plate outline

Outline of indoor unit

Connection pipe (0.39 m) (Flare ∅15.88)

Back body

Front panel

Grille inlet

298

Knock out system

HANDLE

COVER-PV

HANDLE

600

Z View

Service port

321

307

A Detail Drawing (Back leg)

25 Drain outlet

2Ø11x14 Hole (For

Ø8-Ø

10 anchor bolt)

Hole

11x14 Hole

50 36

5.5

6 hole

321

124109

00 or more

Air out

let

321

600

Air inlet

11 Long holes(For

Ø8-Ø

10 anchor bolt)

Gas-side (Flare Ø15.88)

Liquid side (Flare Ø6.35)

90 600 90 69

342

321

B Detail Drawing (Front leg)

436

FAN-GUARD

715

290

275

600 or more

129

Electrical part cover

321

307

100 or more

Installation dimension

2.2 Outdoor Unit

FILE NO. SVM-06010

− 6 −

FILE NO. SVM-06010

3. WIRING DIAGRAM

3-1. RAS-24NKHD-E5 / RAS-24NAH-E

1 2 3

FERRITE CORE

GRN&YEL

RED

BLK

MAGNETIC

CONTACTOR

52C

PNK

WHI

COMPRESSOR TERMINAL

BLK

WHI

BLK BLK

COIL FOR 4 WAY VALVE

RED

CAPACITOR

BLK BLK WHI RED

CN01

CN05

GRY

1 3 5 7 9

GRN&YEL

CHASSIS

TRANSFORMER

BLK BLK

RED RED

CN11

BLU

YEL

1 313

1 1

CN02

BLU

11 33

CN03

F01

250VAC T6. 3A

CR11

CR12

CR13

RY07

RY05

RY06

SG01

CN06

TNR R74

TNR R73

MAIN P.C. BOARD (MCC-890)

COMPRESSOR

FAN MOTOR

POWER SUPPLY 220- 240 V ~ 50 Hz

INDOOR TERMINAL BLOCK

OUTDOOR TERMINAL BLOCK

INDOOR UNIT

C OLO R IDE NT IF IC ATI ON

BR W : BR O WN R E D : R ED WH I : WH ITE YE L : YE LL OW BL U : B LUE BL K : B LA CK GR Y : G RA Y OR N : O R ANG E GR N : GR E E N PN K : P INK

G R N& YE L : G R E EN & YE LL OW

S erial Signa l circuit

MAI N P .C . B OA R D (W P -008)

CN 30

FA N MO TO R

DC MO TO R

CN 10

sens or (TA )

The rmo.

(TC )

sens or

Hea t excha nger

CN 03 CN 01

1 2

WP -008

electrode

Air purifier

RE D B LK

+5V

+12V (B )

+12V (A)

Powe r s upply

High-voltage

BLK

BR W

CN 34

RE D

BR W

Micro S W .

BLU

BR W

4334

2 2

2112

CN 34

9988776655443

211

BL U

CN 13

CN 25

MCC -81 9

and I ndication parts

Infrare d rays rec eive

Louve r motor

BR W

R ED

OR N

YE L

PN K

BL U

6655443

2 1

CN 07

C0 3

DB 01R01

C0 2C0 1

L01

V a ris

tor

6.3 A 25 0V

F0 1

DS A

Va ristor

P0 4BL K

DISCHARGE PIPE SENSOR (TD)

HEAT EXCHANGER SENSOR (TE)

CN08

CN07

BLU

BLK

OUTDOOR

UNIT

− 7 −

FILE NO. SVM-06010

3-2. RAS-24NKDX5-T / RAS-24N2AX-T

GRN&YEL

RED

BLK

CHASSIS

GRY

POWER SUPPLY 220 V ~ 50 Hz

SPARK KILLER

MAGNETIC CONTACTOR

BLK BLK

RED

A2 A1

52C

1/L1 2/T1

3/L2 4/T2

5/L3

6/T3

COMPRESSOR

WHI PNK

BLK

CAPACITOR

WHI RED

F AN M OT OR

B LK

C OMP R ES S O R TE R MIN AL

INDOOR TERMINAL BLOCK

INDOOR UNIT

566

BLUPN K

YE L

OR N

R ED

BR W

Louve r motor

Infrare d rays rec eive and I ndication parts

MCC -81 9

CN 25

CN 13

BL U

112

334

4 5

5 6677889

10 10

1 2 1 2

3 445

5 6

6 778

8 9

10 10

CN 34

1 1 2

1 1

4 3 3

BR W BL U

Micro S W .

BR W BR W BR W RE D

CN 34

BR W

BL K

High-voltage

Powe r s upply

+12V (A)

+12V (B )

+5V

BL KR ED

Air purifier

electrode

WP -008

1 2 1

1 2

CN 01CN 03

Hea t excha nger se nsor (T C)

The rmo.

(T A)

se nsor

CN 10

DC MO TO R

FA N MO TO R

R elay

CN 30

2 3

1 1

3 3

MAI N P .C . B OA R D

BL K P 04

Va ristor

DS A

F0 1

6.3 A 25 0V

Va ristor

L01

C0 1 C0 2

R 01 D B01

C0 3

CN 07

1122

33445

BR W : BR O WN R E D : R ED WH I : WH ITE YE L : YE LL OW BL U : B LU E BL K : B LA CK GR Y : G RA Y OR N : O R ANG E GR N : GR E E N P NK : P INK

G R N& YE L : G R E EN & YE L LOW

C OLO R IDE N TIF IC ATI ON

GR N &Y EL

BL K

WH I

R E D

C N31

C N27

1 1

3 445

5 6

112

334

4 5

5 6

112

23344

P ower s upply

circuit

OUTDOOR TERMINAL BLOCK

OUTDOOR UNIT

− 8 −

FILE NO. SVM-06010

3-3. RAS-18NKDX5-T / RAS-18N2AX-T

GRN&YEL

RED

BLK

CHASSIS

GRY

POWER SUPPLY 220 V ~ 50 Hz

SPARK KILLER

MAGNETIC CONTACTOR

BLK BLK

RED

A1 A2

52C

R U

COMPRESSOR

WHI PNK

BLK

FAN MOTOR

BLK

COMPRESSOR TERMINAL

OUTDOOR TERMINAL BLOCK

OUTDOOR UNIT

CAPACITOR

WHI

RED

− 9 −

INDOOR TERMINAL

566

BL U

PN K

YE L

OR N

R ED

BR W

Louve r motor

Infrare d rays rec eive and I ndication parts

MCC -81 9

CN 25

CN 13

BLUBLUBLUBLUBLUBLUBLUBLUBL

112

334

4 5

5 6677889

10 10

1 2 1 2

3 445

5 6

6 778

8 9

10 10

CN 34

1 1 2

1 1

4 3 3

BR W BL U

Micro S W .

BR W BR W BR W RE D

CN 34

BR W

BL K

High-voltage

Powe r s upply

+12V (A)

+12V (B )

+5V

BL KR ED

Air purifier

electrode

WP -008

1 2 1

1 2

CN 01CN 03

Hea t excha nger se nsor (T C)

The rmo.

(T A)

se nsor

CN 10

DC MO TO R

FA N MO TO R

R elay

CN 30

1 2 3

1 1

3 3

MAI N P .C . B OA R D

BL K P 04

Va ristor

DS A

F0 1

6.3 A 25 0V

Va ris

tor

L01

C0 1 C0 2

R 01 D B01

C0 3

CN 07

1122

33445

BR W : BR O WN R E D : R ED WH I : WH ITE YE L : YE LL OW BL U : B LU E BL K : B LA CK GR Y : G RA Y OR N : O R ANG E GR N : GR E E N P NK : P INK

G R N& YE L : G R E EN & YE L LOW

C OLO R IDE N TIF IC ATI ON

GR N &Y EL

BL K

WH I

R E D

C N31

C N27

1 1

3 445

5 6

112

334

4 5

5 6

112

23344

P ower s upply

circuit

BLOCK

INDOOR UNIT

FILE NO. SVM-06010

4. SPECIFICATION OF ELECTRICAL PARTS

4-1. Indoor Unit

4-2. Outdoor Unit (RAS-24NAH-E)

No. Parts name Type Specifications

Output (Rated) 2200 W, 2 poles, 1 phase, 220 – 240 V, 50 Hz

1 Compressor PH400X3CS-4KT1 Winding resistance (Ω) C-R C-S

(at 20°C) 1.13 2.10

Output (Rated) 42 W, 4 poles, 1 phase, 220 – 240 V, 50 Hz

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

(at 20°C) 128 126

Running capacitor

451405L AC 450 V, 4.0µF

(for fan motor)

Running capacitor

RS44B506K0218S AC 440 V, 50µF

(for compressor)

Solenoid coil

VHV (STF) AC 220 – 240 V

(for 4-way valve)

6 Thermo sensor TE / TD 10 kΩ at 25°C / 50 kΩ at 25°C

7 Magnetic contactor A35 220 − 240 V, 50 Hz

8 Transformer TT-05 220 – 240 V

9 Microcontroller TMP47C840N 10 Varistor (R73, R74, R86) 15G471K 470 V 11 Fuse (F01) MT3 T6.3 A, 250 V

No. Parts name Type Specifications

1 Fan motor (for indoor) ICF-340-30-2 DC 310-340V, 30W 2 Thermo sensor (TA-sensor) ——— 10 kΩ at 25°C 3 Switchins transformer (T01) SWT-77 Output DC 7V, 12Va and 12Vb 4 Microcontroller TMP87CM40ANG 6G60 5 Heat exchanger sensor

——— 10 kΩ at 25°C

(TC-sensor) 6 Line filter (L01) SS11V-R07190 19 mH, AC 0.7 A 7 Diode (DB01) D3SBA60 4 A, 600 V 8 Capacitor (C03) EKMH451VSN121MQ35S 120µF, 450 V 9 Fuse (F01) TSCR T6.3 A, 250 V

10 Switching IC (IC01) MA8920 5 A, 900 V 11 Varistor (R09, R10) 15G561K 560 V 12 Resistor (R01) RF-5TK4R8 1.8 Ω, 5 W 13 Louver motor MP35EA12 Output (Rated) 2 W, 10 poles, 1 phase,

DC 12 V

− 10 −

FILE NO. SVM-06010

4-3. Outdoor Unit (RAS-18N2AX-T)

4-4. Indoor Unit (RAS-24N2AX-T)

No. Parts name Type Specifications

Output (Rated) 1500 W, 2 poles, 1 phase, 220 – 240 V, 50 Hz

1 Compressor PH290X2C-4FT1 Winding resistance (Ω) C-R C-S

(at 20°C) 1.71 3.09 Output (Rated) 42 W, 4 poles, 1 phase, 220 – 240 V, 50 Hz

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

(at 20°C) 128 126

Running capacitor

451305L AC 450 V, 3.0µF

(for fan motor)

Running capacitor

RA44B356U0215S AC 440 V, 35µF

(for compressor)

5 Magnetic contactor CLK-26J 220 – 240 V, 50 Hz

− 11 −

No. Parts name Type Specifications

Output (Rated) 2200 W, 2 poles, 1 phase, 220 − 240 V, 50 Hz

1 Compressor PH400X3CS-4KT1 Winding resistance (Ω ) C-R C-S

(at 20 °C) Output (Rated) 42 W, 4 poles, 1 phase, 220 − 240 V, 50 Hz Winding resistance (Ω) Red-Black White-Black

2 Fan motor (for outdoor)

(at 20 °C)

128 126

FG-240-42A

AC 440 V, 50µF

1.13

2.10

Running capacitor

451305L

AC 450 V, 3.0µF

(for fan motor)

RS44B506U0218S

5 Magnetic contactor

A35

220 − 240 V, 50 Hz

Running capacitor

(for compressor)

FILE NO. SVM-06010

5. REFRIGERATION CYCLE DIAGRAM

5-1. RAS-24NKHD-E5 / RAS-24NAH-E

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

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

Ambient temp.

conditions DB/WB

(°C)

Indoor Outdoor

Standard 1.72 43.5 High 20/− 7/6

Heating High temperature 2.21 58.9 Low 27/− 24/18

Low temperature*1 1.35 38.4 High 20/− −10/−10 Standard 0.43 11.0 High 27/19 35/24

Cooling High temperature 0.53 15.7 High 32/23 43/26

Low temperature 0.34 1.4 Low 21/15 21/15

Standard

pressure

(MPaG)

Surface temp. of heat

exchanger inter changing

pipe

(°C)

Fan speed

(indoor)

50 Hz

Evaporator

Indoor unit

Cross flow fan

Cooling

Heating

4-way valve

Heating

Cooling

Compressor

Condenser

Propeller fan

Outdoor unit

PH400X3CS-4KT1

Accumulator

Cooling Heating

Mark ( ) means check points of Gas Leak

O.D.:15.88 mm O.D.:6.35 mm

Cooling

Heating

Gas container connection (Reinstall etc.)

Packed valve

(

∅

6.35)

Packed valve

(∅15.88)

0.39 m (Connecting pipe)

∅

15.88

0.49 m (Connecting pipe)

∅

6.35

Refrigerant R22

2.00kg

Capillary tube

∅

1.0x1200 l

Capillary tube

∅

2.0x1400 l

•

− 12 −

FILE NO. SVM-06010

Surface temp. of heat

exchanger interchanging

pipe

(°C)

5-4. RAS-24NKDX5-T / RAS-24N2AX-T

Evaporator

Indoor unit

Cross flow fan

Cooling

Compressor

Condenser

Propeller fan Outdoor unit

PH400X3CS-4KT1

Cooling

O.D.:15.88 mm O.D.:6.35 mm

Cooling

Gas container connection (Reinstall etc.)

Packed valve

(

∅

6.35)

Packed valve

(∅15.88)

0.39 m (Connecting pipe)

∅

15.88

0.49 m (Connecting pipe)

∅

6.35

Refrigerant R22 1.68 kg

Mark ( ) means check points of Gas Leak

Capillary tube

∅

2.4x700

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

Ambient temp.

conditions DB/WB

(°C)

Indoor Outdoor

Standard 0.46 10.4 High 27/19 35/24

Cooling High temperature 0.56 13.8 High 32/23 43/26*

Low temperature

0.3

2 2.0 Low 21/15 21/15

Fan speed

(indoor)

50 Hz

Standard

pressure

(MPaG)

− 13 −

FILE NO. SVM-06010

5-8. RAS-18NKDX5-T / RAS-18N2AX-T

Indoor unit

Cross flow fan

Compressor

Condenser

Propeller fan

Outdoor unit

PH290X2C-4FT1

O.D.:15.88 mm O.D.:6.35 mm

Packed valve

(∅15.88)

Packed valve

(∅6.35)

Refrigerant R22 1.50 kg

Evaporator

0.39 m

(Connecting pipe)

∅15.88

0.49 m (Connecting pipe) ∅6.35

Mark ( ) means check points of Gas Leak

Capillary tube

∅2.0x1000 s

Accumulator

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

Ambient temp.

conditions DB/WB

(°C)

Indoor Outdoor

Standard 0.52 11.0 High 27/19 35/24

Cooling High temperature 0.62 14.7 High 32/23 43/26

Low temperature 0.38 3.0 Low 21/15 21/15

Fan speed

(indoor)

50 Hz

Standard

pressure

(MPaG)

Surface temp. of heat

exchanger interchanging

pipe

(°C)

− 14 −

FILE NO. SVM-06010

6. CONTROL BLOCK DIAGRAM

6-1. RAS-24NKHD-E5

REMOTE CONTROL

Remote Control

Operation ( )

Operation Mode Selection

AUTO, COOL, DRY, HEAT, FAN ONLY

Temperature Setting Fan Speed Selection

ON TIMER Setting

OFF TIMER Setting

Louver Auto Swing

Louver Direction Setting

ECO

Hi power

Filter Reset

Infrared Rays

Indoor Unit Control Panel

Heat Exchanger Sensor

Temperature Sensor

Infrared Rays Signal Receiver

Initiallizing Circuit

Clock Frequency

Oscillator Circuit

Power Supply

Circuit

Noise Filter

From Outdoor Unit

220 ~ 240 V AC 50 Hz

M.C.U.

Functions

• Louver Control

• 3-minute Delay at Restart for Compressor

• Motor Revolution Control

• Processing

• Timer

• Serial Signal Communication

Louver ON/OFF Signal

Louver Driver

Serial Signal Transmitter/Receiver

Serial Signal Communication

Operation

Display

Timer

Display

Filter Sign

Display

PRE DEF.

Sign Display

Indoor

Fan Motor

Hi Power

Sign Display

Louver Motor

Infrared

Rays

Remote

Control

(Temperature Processing)

− 15 −

FILE NO. SVM-06010

6-2. RAS-18, 24NKDX5-T

Remote Control

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

Filter Reset

Infrared Rays

Heat Exchanger Sensor

Relay RY04

Outdoor Unit

Outdoor unit

ON/OFF Signal

Relay Driver

Indoor Unit Control Panel

Temperature Sensor

Infrared Rays Signal Receiver

Initiallizing Circuit

Clock Frequency

Oscillator Circuit

Power Supply

Circuit

Noise Filter

From Outdoor Unit 220 ~ 240 V AC 50 Hz

M.C.U.

Functions

• Louver Control

• 3-minute Delay at Restart for Compressor

• Motor Revolution Control

• Processing

• Timer

Louver ON/OFF Signal

Louver Driver

Operation

Display

Timer

Display

Filter Sign

Display

Fan Only

Sign Display

Indoor

Fan Motor

Hi Power

Sign Display

Louver Motor

Infrared

Rays

Remote

Control

(Temperature Processing)

REMOTE CONTROL

− 16 −

FILE NO. SVM-06010

7. OPERATION DESCRIPTION

7-1-1. Louver control

(1) Vertical air flow louver

Position of veritcal air flow louver is automatically

controlled according to the operation mode. Besides, position of vertical air flow louver can be arbitrarily set by pressing [FIX] button.

The louver position which is set by [FIX] button is

stored in the microcomputer, and the louver is automatically set at the stored position for the next operation.

(2) Swing

If [SWING] button is pressed when the indoor unit

is in operation, the vertical air flow louver starts swinging. When [FIX] button is pressed, it stops swinging.

7-1-2. Indoor fan control (AC Fan motor)

(1) The indoor fan is operated by the stepless speed

change AC motor.

(2) For air flow level, speed of the indoor fan motor is

controlled in five steps (LOW, LOW

, MED, MED

and HIGH). If AUTO mode is selected, the fan motor speed is automatically controlled by the difference between the preset temperature and the room temperature.

7-1. Outline of Air Conditioner Control

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

(1) Role of indoor unit controller

The indoor unit controller receives the operation

commands from the remote control and executes them.

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

temperature sensor

• Temperature setting of the indoor heat

exchanger by the heat exchanger sensor

• Louver motor control

• Indoor fan motor operation control

• LED display control

• Transferring of operation commands to the

outdoor unit

• Receiving of information of the operation status and judging of the information or indication of error

(2) Role of outdoor unit controller

The outdoor unit controller receives the operation

commands from the indoor controller and executes them.

• Compressor operation control

• Operation control of

outdoor fan motor

• Turning off the compressor and outdoor fan when the outdoor unit receives the shutdown command

• Defrost control in heating operation (Temperature measurement by the outdoor heat exchanger and control for the four-way valve

and the outdoor fan motor) *Heat pump Model

only

Operations according to the commands

from the indoor unit

LOW

MED+=

LOW+MED

MED+HIGH

Table 7-1-1

− 17 −

FAN TAP

Cooling UH H M+

L+

L- SUL/SL-

OPERATION

Fan only

L-

Dry

L- UL SUL

MODE

Heat

UH H

M+

RAS-18NKDX5-T

rpm

1400

Air flow volume (m3/h)

975 900

1200

1100

380 220

RAS-24NKHD-E5

rpm

1125

1400

708

Air flow volume (m3/h)

1200

1300

300

1400

975

1050

700

975

1200

900

380

Model

1050

1500

1050

RAS-24NKDX5-T

rpm Air flow volume (m3/h)

SUL/SL-

1500

1600

LL+

790

M+ M

L+

L-

1700

L+

800

600

461

700 380

461

800

800 461

900

543

900

543

1050

666

625

1000

1300

700

500

1050 1300

900

1500

790

666

1000

625

1200

790

600

300

600 300

FILE NO. SVM-06010

7-2. Description of Operation Circuit

(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.

7-2-1. 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. 7-2-1. When [FAN] button is set to LOW, LOW+, MED, MED+ or HIGH, the motor operates with a constant air flow.

NOTE :

*1: The values marked with *1 are calculated and

controlled by the difference in motor speed between M+ and L–.

7-2-2. Cooling operation

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

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

operation display lamp are controlled as shown in Fig. 7-2-2.

Fig. 7-2-2

(2) When [FAN] button is set to AUTO, the indoor fan

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

NOTE :

*1: The values marked with *1 are calculated and

controlled by the difference in motor speed between M+ and L–.

Fig. 7-2-3 Setting of air flow [FAN:AUTO]

*1 *1 *1

+3 +2.5 +2 +1.5 +1 +0.5

-0.5

M+

Preset temp.

°C

(Room temp.) − (Preset temp.)

0.5

Preset temp.

ON ON

OFF OFF OFF ON

Compressor

4-way valve

Outdoor fan

OPERATION

display lamp

(Room temp.) (Preset temp.)

(Preset temp.: 24°C)

+2.5

°C

+1.5 +1 +0.5 0

M+

*1 *1 *1

(Room temp.) − (Preset temp.)

Preset temp.

°C

operation cannot be set.

Fig. 7-2-1 Setting of air flow [FAN:AUTO]

(2) The Hi POWER, ECO and COMFORT SLEEP

− 18 −

FILE NO. SVM-06010

7-2-4. 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. 7-2-6.

Fig. 7-2-6

(2) When [FAN] button is set to AUTO, the indoor fan

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

*1, *2 : The values marked with *1 and *2 are

calculated and controlled by the difference in motor speed between M+ and L.

Fig. 7-2-7 Setting of air flow [FAN:AUTO]

7-2-3. Dry operation

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

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

operation display lamp are controlled as shown in Fig. 7-2-4.

Fig. 7-2-4

(2) The microprocessor turns the compressor on and

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

The pattern of operation depending on the relation

between room temperature and preset temperatures is shown in Fig. 7-2-5.

Fig. 7-2-5

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

only.

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

Preset temp.

Preset temp.+1

Preset temp.

Compressor

Outdoor fan

Indoor fan

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

ON ON ON ON

OFF OFF OFF

*Super Low

OFF

4-way valve

Outdoor fan

OPERATION

Compressor

ON:6min.

OFF:4min.

ON:5min.

OFF:5min.

OFF

ON:6min.

OFF:4min.

ON:5min.

OFF:5min.

display lamp

(Room temp.) (Preset temp.)

R oom temp.

OFF

4-way valve

Outdoor fan

Compressor

Preset temp.

OPERATION

display lamp

0.5

(Room temp.) (Preset temp.)

[FAN AUTO]

-0.5

-1

-1.5

-2

*1 *2

-5.0

-5.5

Preset temp.

°C

(Room temp.) − (Preset temp.)

°C

− 19 −

– 20 –

FILE NO. SVM-06010

(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. 7-2-8 and Table 7-2-1.

NOTES :

*1: The fan stops for 2 minutes after thermostat-OFF. *2: A is 24°C when the preset temperature is 24°C or

more and A is the preset temperature when it is

under 24°C. *3: SUL means Super Ultra Low. *4: Calculated from difference in motor speed

between SUL and HIGH.

Fig. 7-2-8 Cold draft preventing control

*5 and *6:

Table 7-2-1

Fan *5 *6 speed Starting period Stabilized period

AUTO • Up until 12 minutes

passed after starting the unit

• From 12 to 25 minutes passed after starting the unit and room temperature is 3°C lower than preset temperature

Manual • Room temperature (L – H) < Preset temperature

–4°C

7-2-5. 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. 7-2-9. The Fan only operation continues until the room temperature reaches a level at which another mode is selected.

(2) Temporary Auto

When the TEMPORARY 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. 7-2-9.

Fig. 7-2-9

• From 12 to 25 minutes passed after starting the unit and room temperature is between preset temperature and 3°C lower than preset temperature

• 25 minutes or more passed after starting the unit

• Room temperature

Preset temperature

–3.5°C

A+4 A+4

A-8 A-8

464534

33 21 32 20

*6 *5

Manual (One of 5 steps)

L-H (Up to setting speed)

AUTO

SUL*

SUL*1 Stop

(Room temp.) − (Preset temp.)

°C

-1

The louver moves to the position same as Hi POWER operation.

Cooling operation

Heating operation

Cooling operation

Fan only operation

RAS-24NKHD-E5 RAS-24NKDX5-T

RAS-18NKDX5-T

7-2-6. Plasma Air-Purifier (PAP) operation.

Plasma Air-Purifier is able to operate together with other operations mode of air conditioner by pressing [PAP] button to turn ON/OFF the Plasma Air-Purifier while other mode is on operation. Plasma Air-Purifier is able to operate individual by pressing [PAP] button to turn ON/OFF instead of pressing [

] button.

For pressing the [

] button is able to turn both air conditioner and Plasma Air-Purifier ON/OFF at the same time. (depends on presetting before turning off.)

When [PAP] button is pressed, mark is indicated on the display of the remote control and the Plasma Air-Purifier operates as follows.

– 21 –

FILE NO. SVM-06010

(1) Operation flow chat.

Descriptions

In case of the first operation, after circuit breaker turns OFF/ON or after reset by case No. 4-1, 4-2, 8 and 9. The Air-Purifier will operates after 1 hour.

For daily used, without turning OFF circuit breaker, Air-Purifier operates immediately. By using short timer function of remote control*, Air-Purifier operates immediately. In case of some error occurs within 1 minute, the above items need to be checked. Case no 3, reset by [RESET] button on the indoor unit. Then Air-Purifier will operate again after 1 hour. Case no 3, reset by [FILTER] button on the remote control. Then Air-Purifier will operate again after 1 hour. Case no 3, reset by turning OFF the unit and turning ON again. Then Air-Purifier operates immediately. In case of some error occurs after 1 minute. Air-Purifier will turn OFF but in contrast, PAP LED will keep turning

ON continuously. Case no 5, the Air-Purifier will operate again after 10 minute. After complete 500 hours operation, FILTER LED will turn ON and Air-Purifier will turn OFF. In addition, Air-Purifier

should be cleaned. Case no 7, reset by [RESET] button on the indoor unit, and Air-Purifier will operate again after 1 hour. Case no 7, reset by [FILTER] button on the remote control, and Air-Purifier will operate again after 1 hour. Case no 7, can not reset by turning unit OFF and ON.

Case

1&2

4-1 4-2 4-3

8 9 !

* Short timer is the function of the remote control that activates the setting for the sudden operation. This

function can be set as shown below.

1. Press [

] button to turn the unit OFF.

2. Use the tip of the pencil to push the [CHECK] button and hold, “00” will show on display, then press [SET] button to make “00” disappear.

3. Press [

] button again to turn the unit ON.

4. When short timer is activated, all setting on the remote operates immediately, Besides, all LED turns ON continuously for 2 seconds.

PAP

START

OPERATION LED ON

PAP LED ON

Indoor fan ON

1 hour later

Less than 1 hour

Air-Purlfier ON

Air-Purlfier OFF

Operation confirm

Error within 1 minute

Error after 1 minute

10 minutes

No error

500 hours

PAP LED ON

Air-Purifier ON

PAP LED ON

Air-Purifier OFF

FILTER LED ON

Air-Purifier OFF

FILTER LED ON

Air-Purifier OFF

Checking

Air-Purifier insertion Inlet-Grlll assembly Micro switch Hi voltage unit

Reset by

1. [RESET] button

2. [FILTER] button

Reset by

1. [RESET] button

2. [FILTER] button

3. Turn unit OFF/ON

8 9

4-3

4-1 & 4-2

– 22 –

FILE NO. SVM-06010

(2) The indoor fan motor and Plasma Air-Purifier operation.

• When Plasma Air-Purifier has been operated with other operation of air conditioner mode (Fan only, AUTO, Cooling, Dry or Heat). The speed revolution of indoor fan is based upon the operated mode of air conditioner. In fact, Plasma Air-Purifier works continuously.

• When the Plasma Air-Purifier is activated individually and the fan speed is set to LOW, LOW+, MED, MED+, or HIGH, the speed revolution of the indoor fan will be constant. In fact, Plasma Air-Purifier works continuously.

Moreover, when the Plasma Air-Purifier is activated individually and the fan speed is set to AUTO, the speed revolution of the indoor fan and the operation of Plasma Air-Purifier is shown as the fig. 7-2-10

Fig. 7-2-10

ON 5 min

OFF 10 min

15 min 30 min 45 min 60 min

Operation time

OFF 10 min

ON 5 min

Plasma Air-Purifier

Revolution

speed of the

indoor fan.

OFF

– 23 –

FILE NO. SVM-06010

7-4.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. 7-4-1.

Fig. 7-4-1

7-5.Low-Temperature Limit Control

The microcontroller detects the indoor heat exchanger temperature to prevent the indoor heat exchanger from freezing. The compressor and outdoor fan motor are controlled as shown in Fig. 7-5-1.

Fig. 7-5-1

7-6.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.

55 54

Compressor

Outdoor fan

OFF

Heat exchanger temp. (°C)

(°C)

Compressor Outdoor fan

Less than continues

for 5 minutes

OFF

Heat exchanger temperature

7-3.Hi PO

(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.

WER Mode

(3)

([Hi PO

Heating operation

WER] b

The preset temper

utton on the remote

ature increases 2

contr

°C,

ol is pressed.)

(The v

When [Hi PO

alue of the preset temper

WER] b

ature on the

utton is pressed while the indoor

remote control does not change

unit is in A.)uto

The indoor unit oper

, Cooling or Heating oper

ates in nor

ation, Hi

mal heating

mode e

WER mar

xcept the preset temper

k is indicated on the displa

ature is higher

y of the remote

(+2

control and the unit oper

°C).

ates as f

(4)

ollo

The Hi POwsWER mode can not be set in Dr.y or F

(1)anA

only operation.

utomatic operation

The indoor unit oper·ates in according to the current operation.

7-6-1. Defrost starting condition

A-Zone : If -10°C > Teo ≥ − 18°C, defrost will

start when. Teo - Te ≥ 2.5°C at teat 20 sec or

~ 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

7-6-2. 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

Fig. 7-6-2

Operation time (4 Loops = Tt)

Td1

Td2

FILE NO. SVM-05016

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

Td3 Td4

Finish time recordStart time record

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

– 25 –

FILE NO. SVM-06010

7-7.Auto Restart Function

The 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 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.

When the unit is on standby (Not operating)

When the unit is in operation

Operation Motions

Push [TEMPORARY] button for more The unit is on standby. than three seconds.

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

After approx. three seconds,

The unit beeps three times The lamp changes from and continues to operate. green to orange.

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

7-7-1. How to set 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. Push the [TEMPORARY] 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.

• While the filter check lamp is on, the [TEMPORARY] button has the function of filter reset button.

→ →

Operation Motions

Push [TEMPORARY] button for more The unit is in operation. The green lamp is on. than three seconds.

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

After approx. three seconds,

The unit beeps three times. If the unit is required to operate at this time, push [TEMPORARY]

button once more or use the remote control to turn it on.

→ →

• While this function is being set, if the unit is in operation, the orange lamp is on.

• This function can not be set if the timer operation has been selected.

• When the unit is turned on by this function, the louver will not swing even though it was swinging automatically before shutting down.

TEMPORARY button

– 26 –

FILE NO. SVM-06010

7-7-2. How to cancel auto restart function

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

When the unit is on standby (Not operating)

When the unit is in operation

• While this function is being set, if the unit is in operation, the orange lamp is on.

7-7-3. Power failure during timer operation

When the unit is in Timer operation, if it is turned off because of power failure, the timer operation is cancelled. Therefore, set the timer operation again.

7-8. Filter Check Lamp

When the elapsed time reaches 1000 hours, the filter check lamp indicates. After cleaning the filters, turn off the filter check lamp.

7-8-1. How to turn off filter check lamp

Press [FILTER] button on the remote control. OR push [TEMPORARY] button on the indoor unit.

Note:

If [TEMPORARY] button is pushed while the filter check lamp is not indicating, the indoor unit will start the Automatic Operation.

Operation Motions

Push [TEMPORARY] button for more The unit is on standby. than three seconds.

The unit starts to operate. The orange lamp is on.

After approx. three seconds,

The unit beeps three times The lamp changes from and continues to operate. orange to green.

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

→ →

Operation Motions

Push [TEMPORARY] button for more The unit is in operation. The orange lamp is on. than three seconds.

The unit stops operating. The orange lamp is turned off.

After approx. three seconds,

The unit beeps three times. If the unit is required to operate at this time, push [TEMPORARY]

button once more or use the remote control to turn it on.

→ →

TEMPORARY button

7-9. Self-Cleaning function.

Self-Cleaning function is designed to reduce humidity that causes mold to form inside the air conditioning unit. This advanced, efficient s

stem reduces moisture in the coil. When you turn off your air conditioner, the internal

fan activates and dries the moisture in the coil for 20 minutes, then turns off automaticall

Operation time

• The Self-Cleaning function is set as default at ex-factory.

• Self-Cleaning operation can stop manually by press [ ] botton of the remote control two more time.

7-9-1. How to cancel Self-Cleanin

function

To cancel the Self-Cleanin

function, proceed as follows:

•

Press TEMPORARY button one time or use remote control to

turn on air conditioner. The OPERATION dis

play

will show in

oran

e color (When AUTO-RESTART is ON) or green color

(

When AUTO-RESTART is OFF).

•

Hold down the TEMPORARY button for more than 20 seconds.

(

The air conditioner will stop suddenly when the TEMPORARY is

ressed but keep holding it continue. Then will beep 3 times in

the first 3 seconds but it is not related to Self-Cleanin

function

)

•

After holding about 20 seconds, the air conditioner will beep 5

times without an

blinking of display.

•

The Self-Cleanin

g Op

eration had been concelled.

Remarks

•

Per settin

of Self-Cleaning function above, AUTO-RESTART

function had been cancelled. To set AUTO-RESTART a

ain,

lease follow item 7-7-1.

7-9-2. How to set Self-Cleanin

function.

To set the Self-Cleanin

function, proceed as follows.

•

Press TEMPORARY button one time or use remote control to

turn on air conditioner. The OPERATION displa

will show in

oran

e color (When AUTO-RESTART is ON) or green color

(

When AUTO-RESTART is OFF).

•

Hold down the TEMPORARY button for more than 20 seconds.

(

The air conditioner will stop suddenly when the TEMPORARY is

pressed but keep holdin

it continue. Then will beep 3 times is

the first 3 seconds but it is not related to Self-Cleanin

function

)

•

After holding about 20 seconds, the air conditioner will beep 5 times and OPERATION displa

blinks 5 times.

•

The Self-Cleanin

function had been set.

Remarks

•

Per settin

of Self-Cleaning function above, AUTO-RESTART

function had been cancelled. To set AUTO-RESTART a

ain,

lease follow item 7-7-1.

Automatically turn-off.

Turn off by remote controller

or timer-off function.

Cool mode or dry mode Self-Cleaning mode

operation more than 10 mins. operate 20 mins.

CDU fan

ON or OFF

OFF OFF

depend on preseting per room temperature.

Compressor

ON or OFF

OFF OFF

depend on preseting per room temperature.

Timer display

ON or OFF

depend on preseting of timer function. depend on preseting of timer function.

FCU louver OPEN CLOSE CLOSE

ON OFF OFF

FCU fan

ON ON

OFF

rpm is depend on preseting. rpm is SUL speed.

Operation display

– 27 −

FILE NO. SVM-06010

TEMPORARY button

When the [QUIET] button is pressed, the fan of the indoor unit will be restricted the revolving speed at

until the [QUIET] button is pressed once

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.

7-11. COMFORT SLEEP mode

The principles of comfort sleep mode are:

• Quietness for more comfortable.

• Save energy by changing room temperature

• The air condition can shut down by itself

Remarks:

1. Comfort sleep mode will not operate in dry mode

FILE NO. SVM-06010

- 28 -

7-10. 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.

speed L

again (cancel Quiet mode).

Because of the fan speed L- may cause not

enough the cooling capacity or heating capacity.

automatically.

and fan only mode.

2. Comfort sleep 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.

7-11-1. Cooling mode

• The fan speed of indoor unit operates automatically,

it relates with the compressor's operation.

Compressor’s Operation Fan Speed

ON L

OFF SL

• The preset temperature will increase 1°C after the

Comfort sleep mode has operated for 1 hour and

automatically.

the temperature will increase another 1°C 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 choose the

operating hours. Repeat pressing to select the hours. (1hr, 3hr, 5hr or 9hr)

• If the [COMFORT SLEEP] button is pressed again

means cancel comfort sleep mode.

7-11-2. Heating mode

• The fan speed of indoor unit operates automatically,

it relates with the compressor's operation.

Compressor’s Operation Fan Speed

ON L

OFF SL

• The preset temperature will drop down 1°C after the

comfort sleep mode has operated for 1 hour and the temperature will decrease another 1°C after the comfort sleep mode has operated for 2 hour. (The value of the preset temperature on the remote control. dose not change.)

operating hours. Repeat pressing to select the hours.

• Press the [COMFORT SLEEP] button to choose the

(1hr, 3hr, 5hr or 9 hr)

• If the [COMFORT SLEEP] button is pressed again

means cancel comfort sleep mode.

FILE NO. SVM-06010

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.

8. INSTALLATION PROCEDURE

8-1.Safety Cautions

For general public use

Power supply cord of Outdoor unit shall be more than 4 mm2 (H07RN-F or 245 IEC66 : polychloroprene sheathed flexible cord) or 3.5 mm2 (AWG-12).

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. 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.

− 29 −

FILE NO. SVM-06010

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.

Remark per EMC Directive 89/336/EEC (For Europe model only)

To prevent flicker impressions during the start of the compressor (technical process) following installation conditions do apply.

1. The power connection for the air conditioner has to be done at the main power distribution. This distribution has to be of an impedance. Normally the required impedance is reached at a 32A fusing point. Air conditioner fuse has to be 16A max.!

2. No other equipment should be connected to this power line.

3. For detailed installation acceptance, please contact your power supplier whether its restriction does apply for products like washing machines, air conditioners or electrical ovens.

4. For power details of the air conditioner, refer to the rating plate of the product.

− 30 −

FILE NO. SVM-06010

8-2. Installation Diagram of Indoor and Outdoor Units

tta

t p

l.) (A

tta

filte

Do not allow the drain hose to

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

Insulate the refrigerant pipes separately with insulation, not together.

6 mm thick heat resisting polyethylene foam

Rear left

Left

Bottom

Right

Rear

Wall

For the rear left and left piping

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

get slack.

Make sure to run the drain hose sloped downward.

Cut the piping hole sloped slightly .

100 mm or more

170 mm or mo

170 mm or more

1 Installation

plate

Hook

Before installing the wireless remote control

• With the remote control cover open, load the batteries supplied correctly, observing their polarity.

3 Batteries

2 Wireless remote control

Cover

2 Wireless remote control

m o

r m

ore

600 mm or more

Saddle

Vinyl tape Apply after carr ying out a draina ge test.

Extension drain hose (Not available, provided by installer)

6 Plasma air purifier

5 Sasa-Zeolite plus filter

Shield

pipe

− 31

−

FILE NO. SVM-06010

8-3.Installation

8-3-1. Optional installation parts

Part

Code

Parts name

Refrigerant piping Liquid side : ∅6.35 mm Gas side : ∅15.88 mm

• 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.

 • If it is necessary to drain the defrost water, attach drain nipple 9 to the bottom plate of the outdoor unit

before installing it.

Fig. 8-3-1.

Air inlet

Air outlet

Drain outlet

600 mm

90 mm

124 mm109 mm

28 mm

86 mm

116 mm

321 mm

One

each

Pipe insulating mater (polyethylene foam, 6 mm thick)

Putty, PVC tapes

One

each

Q'ty

− 32 −

– 33 –

FILE NO. SVM-06010

8-3-2. Accessory and installation parts

Part

No.

Part name (Q'ty)

Installation plate x 1

Wireless remote control x 1

Battery x 2

Part name (Q'ty)

Remote control holder x 1

Sasa-Zeolite plus filter x 2

Plasma air purifier x 1

Part

No.

Part

No.

Others

Name

Owner’s manual

Installation manual

Part name (Q'ty)

Mounting screw ∅ 4 x 25 x 8



Pan head wood screw

∅ 3.1 x 16 x 2

Drain nipple * x 1 (For Heat pump model only)

The part marked with asterisk (*) is packaged with the

outdoor unit.

FILE NO. SVM-06010

8-4.Indoor Unit

8-4-1. Installation place

• A place which provides the spaces around the indoor unit (See Fig 8-2).

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

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

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

CAUTION

• Direct sunlight to the indoor unit’s wireless

receiver should be avoided.

• The microprocessor in the indoor unit should not

be too close to RF noise sources. (For details, see the owner’s manual.)

• A place where there are no obstacles such as a curtain that may block the signal from the indoor unit.

• Do not install the remote control in a place exposed to direct sunlight or close to a heating source, such as a stove.

• Keep the remote control at least 1 m apart from the nearest TV set or stereo equipment. (This is necessary to prevent image disturbances or noise interference.)

• The location of the remote control should be determined as shown below.

Fig. 8-4-1

5 m

* 7 m

7 m

(Top view)

Indoor unit

* : Axial distance

Reception range

Remote control

Indoor unit

Remote control

(Side view)

8-4-2. Cutting a hole and mounting installation

plate

When installing the refrigerant pipes from the rear.

Fig. 8-4-2

1. After determining the pipe hole position on the mounting plate (A), drill the pipe hole (∅65 mm) at a slight downward slant to the outdoor side.

NOTE

• When drilling a wall that contains a metal lath, wire lath or metal plate, be sure to use a pipe hole brim ring sold separately.

Fig. 8-4-3

Pipe hole

100 mm

The center of the pipe hole is above the arrow.

170

120

7 Mounting screw

Pipe hole

Indoor unit

Thread

Weight

Hook

Installation plate

Hook

− 34 −

FILE NO. SVM-06010

1. Securely fit the installation plate onto the wall by screwing it in the upper and lower parts to hook up the indoor unit.

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

3. Install the installation plate horizontally in the wall.

CAUTION

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

Projection 15 mm or less

Clip anchor (local parts)

5 mm dia. hole

Anchor bolt

Fig. 8-4-4

7 Mounting

screw ∅4 x 25

CAUTION

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

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

• Insert clip anchors for appropriate mounting screws 7 .

NOTE

• Secure four corners and lower parts of the installation plate with 6 to 8 mounting screws to install it.

Installation plate <Keep horizontal direction>

8-4-3. Electrical work

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

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

NOTE

• Wire type : More than 1.5 mm

(H07RN-F or

245 IEC66) or 1.3 mm2 (AWG-16)

CAUTION

• This appliance can be connected to the mains in the following way. 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 incorporate in the fixed wiring. An approved circuit breaker or switches must used.

NOTE

• Perform wiring works so as to allow a generous wiring capacity.

− 35 −

FILE NO. SVM-06010

8-4-4. Wiring connection

Fig. 8-4-5

<How to connect the connecting cable> Wiring of the connecting cable can be carried out

without removing of 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 (according to local cords) into pipe hole on the wall.

4. Take out the connecting cable through the cable slot on the rear panel so that it protrudes about 15 cm from 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. Fix the terminal cover, rear plate bushing and air inlet grille on the indoor unit.

Earth line

Connecting cable

Cord clamp

Terminal block

Screw

Terminal cover

Screw

CAUTION

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

• Check local electrical cords and also any specific wiring instructions or limitations.

Fig. 8-4-6

Fig. 8-4-7

NOTE

Use stranded wire only.

• Wire type : More than 1.5 mm2 (H07RN-F or 245 IEC66) or 1.3 mm2 (AWG-16)

Fig. 8-4-8

NOTE

Connect the earth line to the metallic part (i mark) located at the side of 3P terminal.

• When attaching the air inlet grille, the contrary of

the removed operation is performed.

Fig. 8-4-9

t 1

Connecting cable

Earth line

Air Inlet grille

Front panel

− 36 −

FILE NO. SVM-06010

8-4-5. Piping and Drain Hose Installation <In case of rightward piping>

• After scribing slits of the body-right by a knife or a making-off pin, cut them by a pair of nippers or the like.

Fig. 8-4-10

• After scribing slits of the body-right by a knife or a making-off pin, cut them by a pair of nippers or the like.

Fig. 8-4-11

<Left-hand connection with piping>

Bend the connecting pipe so that it is laid within 43 mm above the wall surface. If the connecting pipe is laid exceeding 43 mm above the wall surface, the indoor unit may unstably be set on the wall. When bending the connecting pipe, make sure to use a spring bender so as not to crush the pipe.

Bend the connection pipe within a radius of 30 mm.

Slit (Body-right)

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

Fig. 8-4-12

NOTE

If the pipe is bent incorrectly, the indoor unit may unstably be set 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.

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.

• Carefully arrange pipes so that any pipe does not 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 dewing results in a machine trouble , make sure to insulate both the connecting pipes. (Use polyethylene foam as insulating material.)

• When bending a pipe, carefully do it not to crush it.

(To the forefront of flare)

Liquid side

Outward form of indoor unit

R 30 mm (Use polisin (polyethylene) core or the like for bending pipe.)

Use the handle of screwdriver, etc.

400 mm

300 mm

43 mm

Gas side

Installation plate

Auxiliary pipes

Indoor unit

Connecting cable

Drain hose

− 37 −

FILE NO. SVM-06010

8-4-7. Drainage

1. Run the drain hose sloped downwards.

NOTE

• Hole should be made at a slight downward slant on the outdoor side.

Fig. 8-4-15

2. Put water in the drain pan and make sure that the water is drained out of doors.

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

Fig. 8-4-16

CAUTION

Arrange the drain pipe for proper drainage from the unit. Improper drainage can result in dew-dropping.

This air conditioner has the structure designed to drain water collected from dew, which forms on the back of the indoor unit, to the drain pan. Therefore, do not store the power cord and other parts at a height above the drain guide.

Fig. 8-4-17

Inside the room

Drain hose

Shield pipe

Extension drain hose

Wall

Drain guide

Space for pipes

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

Do not form the drain hose into a wavy shape.

Do not put the drain hose end into water.

Do not rise the drain hose.

50 mm or more

8-4-6. Indoor unit fixing

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 up 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 up on the installation plate.

Fig. 8-4-13

• For detaching the indoor unit from the installation plate, pull the indoor unit toward you while

pressing

its bottom up at the specified parts.

PressPress

Press

(unhook)

Fig. 8-4-14

Hook

Hook here

1 Installation

plate

− 38 −

FILE NO. SVM-06010

• 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. (18 Class) or 10 m. (24 Class)

• A place where the drain water does not raise any problem.

CAUTION

1. Install the outdoor unit without anything blocking the air discharging.

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

3. Specially in windy area, install the unit to prevent the admission of wind.

4. Installation in the following places may result in trouble. Do not install the unit in 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 as from audio equipment, welders, and medical equipment.

Fig. 8-5-1

Strong

wind

8-5-2. Refrigerant piping connection

1. Cut the pipe with a pipe cutter.

Fig. 8-5-2

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

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

Fig. 8-5-3

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.

90°

Roughness

Warp

Obliquity

Die

Pipe

Outer dia.

of copper pipe

Rigid Imperial

6.35 1.0 to 1.5 1.5 to 2.0

15.88 1.0 to 1.5 2.0 to 2.5

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

•

A place which can bear the w

eight of the outdoor unit and does not allow an increase in noise level and vibration.

of indoor and outdoor unit.

8-5. Outdoor Unit

8-5-1. Installation place

− 39 −

FILE NO. SVM-06010

8-5-3. 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.

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 vacuum pump.

3. Open fully the low pressure side handle of the gauge manifold valve.

4. Operate the vacuum pump to start for 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.

Fig. 8-5-6

Use a wrench to secure.

(Unit : N·m)

Use a torque wrench to tighten.

Flare nutHalf union

Externally threaded side

Internally threaded side

Flare at indoor unit side

Flare at outdoor unit side

Outer dia.

Tightening torque

of copper pipe

∅6.35 mm 16 to 18 (1.6 to 1.8 kgf·m)

∅15.88 mm 65 to 80 (6.5 to 8.0 kgf·m)

• Tightening torque of flare pipe connections

Fig. 8-5-4

Fig. 8-5-5

CAUTION

•

KEEP IMPORTANT 4 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)

Pressure gauge

Manifold valve

Handle Lo

Connecting pipe

Compound pressure gauge

Vacuum

pump

Handle Hi (Keep full closed)

Charge hose

Vacuum pump adapter for counter-flow prevention

Service port (Valve core (Setting pin))

Packed valve at liquid side

Packed valve at gas side

-101kPa (-76cmHg)

− 40 −

FILE NO. SVM-06010

• 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:

• Hexagonel wrench : A (Unit : mm)

Fig. 8-5-7

8-5-4. 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.

Gas side Tightening torque A

Gas side 65 to 80 N·m 4 mm (∅15.88 mm) (6.5 to 8.0 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)

Hexagonal wrench is required.

Fig. 8-5-8

CAUTION

• Wrong wiring connection may cause some electrical parts burn out.

• Be sure to comply with local codes on running the wire from indoor unit to outdoor unit (size of wire and wiring method etc).

• Every wire must be connected firmly.

NOTE: Connecting cable

• Wire type: More than 1.5 mm2 (H07RN-F or 245 IEC66) or 1.3 mm2 (AWG-16)

Power supply cord

Terminal block

Connecting cable

Screw

Cord clamp

Earth line

Connecting cable

Power supply cord

Earth line

Terminal screw

LN 1 32

123

TO CHARGE REFRIGERANT

Refrigerant

No need to charge

15 m or less 15 m or less

extra refrigerant

Need to charge Over 15 m up to Over 15 m up to extra refrigerant 25 m (30 g/m) 20 m (20 g/m)

24 class 18 class

Model

50 Hz, 220 - 240 V Single phase

Power source

50 Hz, 220 V Single phase

(For RAS-24NKDX5-T / RAS-24N2AX-T and

RAS-18NKDX5-T / RAS-18N2AX-T model)

Maximum

18A 16A

running current Plug socket &

20A 20A

fuse rating Power cord 4 mm2 (H07RN-F or 245 IEC66) or 3.5 mm2 (AWG-12)

24 class 18 class

− 41 −

– 42 –

FILE NO. SVM-06010

8-6.How to Set Remote Control Selector

Switch

When two indoor units as installed in seperated rooms, there is no need to change the selector switch.

• When two indoor units are installed in the same room or the adjacent two rooms, they may be controlled simultaneously with a single remote control. To prevent this, set either unit and its remote control to B setting. (Both units are set to A setting before shipment.)

• The remote control signal is not recived when the indoor unit setting is different from the remote control one.

1. Set the remote control selector switch with the indoor unit.

1) Turn the circuit breaker of the main power switch off before setting the selector switch.

2) Remove the Air inlet grille and Front panel. (Refer to

2. Set the remote control selector switch with the remote control

[B] is indicated on the liquid crystal display when setting remote control from A to B. [A] is not indicated on the display even if the selector is set to A.

1) Load the remote control with the batteries.

2) Press the [CHECK] button using something with sharp point. (The preset temperature on the remote control changes to [00].)

3) Press the [MODE] button while pressing the [CHECK] button, [B] is indicted at the right of the present temperature display.

• To reset the switch to the [A] setting, press the [MODE] button again while pressing the [CHECK] button.

Fig. 8-6-2

3. Confirm that the indoor unit can operate with the new setting.

[MODE] button

[CHECK] button

PAP

AUTO

PRESET

MODE

CLOCK

CHECK

FILTER

RESET

HiPOWER

ECO

MEMO

CLR

SET

SWING

FIX

FAN

SLEEP

OFF

TEMP

1.3.5.9H

A B

CAUTION

Do not use any other sharp tools (such as cutters, pliers, or the like), Such tools may cause breakage or damage.

with only the nippers.

3) Open the Electrical part cover (Refer to chapter 10-1, procedure 2 ), then cut the jumper (J01)

Chapter 10-1, procedure 1 )

See Fig. 8-6-1

Fig. 8-6-1

FILE NO. SVM-06010

8-7.Others

8-7-1. Gas leak test

Fig. 8-7-1

• Check the flare nut connections, valve stem cap connections and service port cap connections for gas leak with a leak detector or soap water.

8-7-2. Test operation

To switch the TEST RUN (COOL) mode, press TEMPORARY b utton for 10 sec. (The beeper will make a short beep.)

Fig. 8-7-2

8-7-3. 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.

• Press and hold the TEMPORARY button for about 3 seconds. After 3 seconds, the electronic beeper makes three short beeps to tell you the Auto Restart has been selected.

• To cancel the Auto Restart, follow the steps described in the section Auto Restart Function of the Owner’s Manual.

Service port cap connection

Valve stem cap connection

Flare nut connections (Outdoor unit)

Flare nut connections (Indoor unit)

Valve stem cap connection

− 43 −

TEMPORARY button

– 44 –

FILE NO. SVM-06010

9-2-2. Incorrect cable connection between Indoor

and outdoor units

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).

9-2-3. 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.

9. TROUBLESHOOTING CHART

9-1. Troub leshooting Pr ocedure :

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

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.

Table 9-2-1

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 compressor is not turned on even

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

6 The operation mode changes in the

Automatic operation.

7 The Fan only operation continues in the

Automatic operation.

8 The ECO operation or Hi-POWER

operation does not work.

9 When [Hi POWER] button is pressed,

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

No. Operation of air conditioner Descriptions

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 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.

– 45 –

FILE NO. SVM-06010

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

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.

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)

G OPERATION, TIMER and PRE-DEF.

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

Table 9-3-2 Diagnosis by detective operation

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.

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.

Symptom Check Primary judgement

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

Cycle failure

• Gas shortage or other refrigerant cycle trouble

• Heat exchanger sensor open, break or short

• Overload relay or thermostat trouble of compressor

FILE NO. SVM-06010

– 46 –

9-4.Self-Diagnosis by Remote Control

(Check Code)

(1) If the lamps are indicated as shown B to G in Table

9-3-1, exchanger the self-diagnosis by the remote control.

(2) When the remote control is set to the service

mode, the indoor controller diagnoses the operation condition and indicate the information of the self-diagnosis on the display of the remote control with the check codes. If a fault is detected, all lamps on the indoor unit will blink at 5Hz and it

will beep for 10 seconds (Pi, Pi, Pi....). The timer

lamp usually blinks (5Hz) during the self-diagnosis.

9-4-1. How to use remote control in service mode

(1) Press [CHECK] button with a tip of pencil to set the

remote control to the service mode.

• “00” is indicated on the display of the remote control.

• The timer lamp on the indoor unit blinks continuously. (5 times per 1 sec.)

(2) Press [ON 8] or [OFF 9] button.

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

• Check the unit with all 52 check codes (00 to 33). as shown in Table 9-4-1.

• Press [ON 8] or [OFF 9] button to change the check code backwards.

If there is a fault, the indoor unit will beep f or 10 seconds (Pi, Pi, Pi...). Note the check code on the display of the remote control.

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

• All lamps on the indoor unit will blink. (5 times per 1 sec.)

(4) Press [

] button to release the service mode.

• The display of the remote control returns to as it was before service mode was engaged.

(3) Press [CLR] button. After service finish for clear

service code in memory.

• “7F” is indicated on the display of the remote control.

• Alphanumeric characters are used for the check code. is 5. is 6.

is A. is B. is C. is D.

00 01 1d 1E02 33

(5) Time shotening method.

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

2. Press [

] button.

PAP

AUTO

PRESET

MODE

CLOCK

CHECK

FILTER

RESET

HiPOWER

ECO

MEMO

CLR

SET

SWING

FIX

FAN

SLEEP

OFF

TEMP

1.3.5.9H

CLOCK

CHECK

RESET

CLR

− 47 −

FILE NO. SVM-06010

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.

Table 9-4-1

Block level Diagnosis function

Judgement and action

Check

Block

Check

Symptom

Unit

Condition

code code status

Operation continues.

All off

Operation continues.

All off

Operation continues.

All off

Operation continues.

All off

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.

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.

Indoor P.C. board

Cable connection

Outdoor P.C. board

Other parts (including compressor)

•

– 48 –

FILE NO. SVM-06010

9-5. How To Diagnose Faulty Parts

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

[04 Serial signal error] (Heat pump model)

YES

Does outdoor

unit operate?

Are 1, 2 and 3 crossover

wires connected properly?

Is connector

connected properly?

Does LED (Orange) on

outdoor P.C. board blink?

Does LED (Green) on

outdoor P.C. board blink?

Outdoor P.C. board

is defective.

Replace

P.C. board.

Connect crossover

wires properly.

Connect connector

properly.

Indoor P.C. board

is defective.

Replace

P.C. board.

Operation

Check item

Conceivable principle cause

Measure

Item by symptoms

Does four-way valve

operate properly?

Does coil terminal have 220 − 240 V

in heating operation?

Are circuit

wires normal?

Is outdoor P.C. board

normal?

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.

YES

Is TC sensor

resistance value

(10 kΩ at 25°C) normal?

– 49 –

FILE NO. SVM-06010

YES

Does compressor operate?

Is compressor

turned off shortly?

Does inner

overload relay

(in compressor)

operate?

Check charged amount of refrigerant.

Check defective overload.

Check compressor.

Replace

compressor.

Replace TC

sensor.

Connect TC

sensor properly.

Is TC sensor

disconnected from

the sensing element?

Is circuit wiring

normal?

Is outdoor P.C.

board normal?

Wiring check/modification

Replace

P.C. board.

Replace

P.C. board.

Outdoor P.C. board

is defective.

Indoor P.C. board

is defective.

Is TC sensor

resistance value

(10 kΩ at 25°C) normal?

Failure

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

[09 Other cycle error] (2)

Clean filters.

Replace

TC sensor.

Charge

refrigerant.

Replacd

P.C. board.

Anti-freezing operation

Does indoor fan operate?

Are filters clogged?

Is charged amount

of refrigerant normal?

Is outside air

low load?

Indoor P.C. board

is defective.

Is connector

connected properly?

YES

Is condenser normal?

Is indoor fan

motor normal?

Connect

connector

properly.

Replace

condenser.

Replace

fan motor.

Is TC sensor

resistance value

(10 kΩ at 25°C) normal?

– 50 –

FILE NO. SVM-06010

[0C Indoor TA sensor error]

[0d Indoor TC sensor error]

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

YES

Is CN03 (TA sensor connector)

connected properly?

Is TA sensor resistance value

(10 kΩ at 25°C) normal?

Indoor P.C. board is defective.

Connect CN03 properly.

Replace T A sensor.

Replace P.C. board.

YES

Is CN01 (TC sensor connector)

connected properly?

Is TC sensor resistance value

(10 kΩ at 25°C) normal?

Indoor P.C. board is defective.

Connect CN01 properly.

Replace TC sensor.

Replace P.C. board.

YES

Is TE sensor connector

connected properly?

Is TE sensor resistance value

(10 kΩ at 25°C) normal?

Indoor P.C. board is defective.

Connect connector

properly.

Replace TE sensor.

Replace P.C. board.

– 51 –

FILE NO. SVM-06010

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

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

NO NO

YES

Is protective

controller such as discharge

thermostat normal?

Is charged amount

of refrigerant normal?

Is overload relay normal?

Is TD sensor resistance value

(50 kΩ at 25°C) normal?

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.

YES

Is TD sensor

connected properly?

Is TD sensor resistance value

(50 kΩ at 25°C) normal?

Outdoor P.C. board is defective.

Connect connector

properly.

Replace TD sensor.

Replace P.C. board.

– 52 −

FILE NO. SVM-06010

9-6. Troubleshooting for Indoor unit

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

Is it possible to

turn on power

supply by

pressing

[ ]

button on remote

control?

Does

transmission

mark on

remote

control flash

normally, and

is its signal

transmitted

properly?

Remote control is

defective.

Refer to 9-9

Remote Control."

Parts (R10,

C01, DB01,

or C02, C03

IC01)

are defective.

Is fuse (F01)

of indoor

control board

blown?

Is voltage (DC

12V or 5V)

indicated on rear of indoor control board

normal?

Microconlroler

defective.

Replace main P.C.

board.

Is DC 310 -

340V across

C03?

Are DC 12V,

across C27?

Turn off breaker

once and turn it

on again after

removing motor.

Are DC 12V,

across C27?

T01 or IC01 is

def

tive.

Replace motor.

YES

Does the fan

motor

connector

between 1

and

short-

circuit?

Unit operates

normally.

Operation

Measure

Item by symptoms

Check item

Conceivable principle

cause

"Troubleshooting for

– 53 –

FILE NO. SVM-06010

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.)

[ ]

– 54 –

FILE NO. SVM-06010

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?

Turn on power supply.

Does OPERATION

lamp blink?

Does miniature relay RY04

switch on and off due to

temperature changes?

Is resistance value of thermo

sensor (TA) and heat ex-

changer sensor (TC) normal?

Thermo sensor or

heat exchanger

sensor is defective.

Replace thermo sensor

or heat exchanger

sensor.

Refer to 9-6-1 “Power

can not be turned on”.

Is it possible to detect AC

220 – 240V between 2

and 3 on terminal block?

Are all of compressor cords normal?

Is compressor motor winding

normal?

(Check winding resistor.)

Is capacitor for compressor normal?

Is overload relay normal?

Does compressor start?

Does compressor stop after a while?

Is gas quantity normal?

(Check gas pressure.)

Compressor is defective.

YES

Replace P.C. board.

Gas shortage (Gas leak)

Compressor is defective.

Microcomputer is defective.

Miniature relay RY04 is

defective.

Overload relay is

defective.

Capacitor is defective.

Compressor is defective.

Replace P.C. board.

Rewire or replace

defective cords.

Replace compressor.

Replace capacitor.

Replace overload relay.

Replace compressor.

Supply gas.

YES

− 55 −

Is it possible to start

unit by remote control?

YES

Turn on power supply.

Does OPERATION

lamp blink?

YES

Refer to item Power

can not be turned on .

Refer to 9-9 Troubleshooting

for Remote Control .

YES

Connect crossover

cable properly.

Are all of compressor cords normal?

Rewire or replace

defective cords.

Replace compressor.

Replace P.C. Board

Is resistance of compressor motor

windining normal?

Compressor is defective.

YES

Replace compressor.

Is capacitor for compressor normal?

Capacitor is defective.

Is it possible to detect AC 200V

between 2 and 3 on terminal block?

Is crossover cable normal?

YES

Is overload relay normal?

Does compressor start?

Does compressor stop after a while?

Is gas quantity normal?

(Check gas pressure.)

Compressor is defective.

Replace Compressor

YES

Overload relay is defective.

Compressor is defective.

Gas shortage (Gas leak)

Replace overload relay.

Replace compressor.

Supply gas.

FILE NO. SVM-06010

- Cooling model -

− 56 −

<Inspection procedure)

- Heating model -

Replace transformer

FILE NO. SVM-06010

AC 70-100V

outdoor

P.C. board.

(CN06) of transformer?

– 57 –

YES

Rewire or replace

defective cords.

Replace compressor.

Replace capacitor.

Replace overload relay.

Replace compressor.

Supply gas.

YES

Are all of compressor cords normal?

Is compressor motor winding normal?

(Check winding resistor.)

Is gas quantity normal?

(Check gas pressure.)

Is capacitor for compressor normal?

Is overload relay normal?

Does compressor start?

Does compressor stop after a while?

Replace compressor.

Compressor is defective.

Capacitor is defective.

Overload relay is defective.

Compressor is defective.

Gas shortage (Gas leak)

FILE NO. SVM-06010

− 58 −

FILE NO. SVM-06010

9-7. Troubleshooting for Wiring (Interconnect cable and Serial Signal Wire)

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

(1) Is the voltage between and of the indoor terminal block varied? (2) Are signals from the indoor unit to the outdoor unit transmitted correctly based upon the following diagram?

NOTE:

 Measure the voltage for 2 minutes and 30 seconds after starting the unit. 

Normal condition : Voltage 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.

Terminal block on indoor side

Terminal block

Tester

Red

White

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

(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.)

Measure gas pressure.

Gas shortage

Pipe clogging

Compressor is turned off and on automatically by thermo sensor

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

Gas has a low circulation.

Gas leak

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

Fig. 9-7-1

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

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

Terminal block on indoor side

Terminal block

Tester

Red

White

Heatpump model

Cooling model

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

FILE NO. SVM-06010

– 59 –

9-8. Troubleshooting for Air Purifier and Minus Ion

9-8-1. How to Check Whether the Air Purifier is Good or Not

Push the switch

Releaes the switch

OFF

Tester

Ionizer

Output

High-voltage tester

Collector output

Micro-switch malfunction

Micro-switch is stuck

Is DC12V applied

between

(+) and 2 (−)

of CN33 of the main

P.C. board (WP-008)?

Are the dust

collector/ionizer/ionized

wire units dirty?

Is an abnormal sound

(cracking noise) heard

from the electrode?

Is output of the ionizer approx. 3.9kV to 4.7kV? Is output of the collector approx. 2.9kV to 3.7kV?

Refer to items, cleaning and check for the dust collector/ionizer/ionized wire units.

When the ionized wire is disconnected or when dirt is not cleaned even cleaned, replace each unit.

Referring to the right figure, check the high-output voltage of the air filter unit.

(NOTE)

Use an exclusive high voltage tester; otherwise the tester may be broken.

Dry the dust collector and ionizer.

Is DC-5V to DC-10V

applied between

4 (Brown/Negative voltage)

and 2 (Brown/GND)

of CN33 of the main

P.C. board?

Are the dust collector

and ionizer dried?

(Electrode check)

Does the plasma lamp

go off within 2 seconds after

it was ON, and does the

filter lamp (Orange) go on?

Does the plasma lamp (Blue) or

the filter lamp (Orange) go on?

1) Check operation while short-circuiting CN34 of the main P.C. board.

2) Perform air purifying operation by the remote control.

• In this time, check that the remote control is in status which is shortened by time on the reactivation preventive timer and all display lamps go on for approx. 3 seconds when a signal is received.

If time on the reactivation preventive timer is not shortened, the high-voltage is not applied to electrode of the air purifier for approx. 1 hour.

• While the air purifier operates, check that the fan speed [AUTO] is not displayed. (Because the power ON/OFF is controlled on the program)

3) Be sure not to touch the dust collector, ionizer, or ionized wire unit with the human body.

Does the OPERATION lamp blink?

Replace the high-voltage unit.

Replace the main P.C. board (WP-008).

Replace micro-switch.

Turn off the power breaker and remove CN34 (Micro switch connector). Short-circuit between 1 and 2 pin of CN34 at PC side, and turn on the power breaker after 10 seconds.

[ ]

GND

No trouble

• Conduction check of micro-switch

YES

Turn off the power breaker once, and turn on again after 10 seconds.

Operation check Primary check

Is there conduction of

micro-switch connector under

OFF status of the micro-switch

(Front panel opened)?

Is there conduction of micro-switch connector under ON status of the micro-switch

(Front panel closed)?

Does the indoor fan rotate?

Is DC12V applied

between

(Red/DC12V) and

(Brown/GND) of CN1 of the

high-voltage unit?

Replace the main P.C. board (WP-008)

YES

• How to check output of the air purifier <Caution on High Voltage!!>

Be sure not to come to contact to the silver part or not to touch the ionized cables.

( )

To item Power supply is not turned on

To item Only indoor fan does not operate

FILE NO. SVM-06010

– 60 –

9-8-2. How to Check Whether the Minus Ion Generator is Good or Not

•

How to check output of minusion

No trouble

Does the plasma lamp (Blue) or

the filter lamp (Orange) go on?

Replace the main P.C. board (WP-008).

1) Check operation while short-circuiting CN34 of the main P.C. board.

2) Perform air purifying operation by the remote control.

If time on the reactivation preventive timer is not shortened, the high-voltage is not applied to electrode of the air purifier for approx. 1 hour.

• While the air purifier operates, check that the fan speed [AUTO] is not displayed. (Because the power ON/OFF is controlled on the program)

3) Be sure not to touch the electrode with the human body.

( )

Turn off the power breaker and remove CN34 (Micro switch connector). Short-circuit between 1 and 2 pin of CN34 at PC side, and turn on the power breaker after 10 seconds.

Does the electrode

output approx. −6kV?

Referring to the right figure, check the high-voltage output of the air ionizer. In this time, peel the thermal insulator, and attach it to the original position after check operation. NOTE : Use an exclusive high voltage tester; otherwise the tester may be broken.

Does the plasma lamp

go off within 2 seconds after

it was ON, and does the

filter lamp (Orange) go on?

Does the indoor fan rotate?

Micro-switch is stuck

Micro-switch malfunction

Is there conduction of micro-switch connector under ON status of the micro-switch

(Front panel closed)?

Is there conduction of micro-switch connector under

OFF status of the micro-switch

(Front panel opened)?

Is DC12V applied between 1 (Red/DC12V) and 2 (Brown/GND) of CN1 of the

high-voltage unit in the air purifier?

Does the OPERATION lamp blink?

Turn off the power breaker once, and turn on again after 10 seconds.

• Conduction check of micro-switch

Replace micro-switch.

Operation check Primary check

YES

Replace the power P.C. board

(WP-008) or the housing assembly.

Integrated

power supply assembly

Push the switch

Releaes the switch

OFF

Tester

GND

Electrode

High-voltage unit

High-voltage tester

To item Power supply is not turned on

To item Only indoor fan does not operate

To item How to check whether

the air purifier is good or not

9-9. Troubleshooting for P.C. board

9-9-1. 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 lead wires.

– 61−

FILE NO. SVM-06010

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.

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.

(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

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

Table 9-9-1 Inspection procedure

No. Procedure Check points Causes

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.

<Heat pump model> IC03 or IC04 are defectice.

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.

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 −

of C03

(DC310 − 340 V)

3. Between 12 V and GND

4. Between 5 V and GND

Check power supply voltage; <Heat pump model>

1. Between CN31 and CN23

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 PAP, FILTER and Hi-power) are indicated for 3 seconds and they return to normal 3 seconds later.

(AC70 ~ 100V)

– 62 –

FILE NO. SVM-06010

Table 9-9-2 Approximate resistance value of thermo sensor

9-9-2. How to Shorten Time of Restart Delay Timer

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.)

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.)

No. Procedure Check points Causes

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.

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 T ab le 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.

1. Check whether or not the compressor operates.

2. Check whether or not the OPERATION lamp blinks.

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 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.

Temperature 0°C10°C20°C25°C30°C

Resistance value 33.8 20.35 12.59 10.0 7.99

(kΩ)

The self cleaning function is set from a factory. To cancel this function, should keep press the RESET switch on Indoor unit for 20 secounds till can hear the long combination sound and repeat the

same procedure when need to set.

PAP

AUTO

PRESET

MODE

CLOCK

CHECK

FILTER

RESET

HiPOWER

ECO

MEMO

CLR

SET

SWING

FIX

FAN

SLEEP

OFF

TEMP

1.3.5.9H

] button to transmit the signal to the

indoor unit.

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

with a tip of a pencil.

2 Then press [

9-9-3. How to set/cancel self cleaning function

– 63 –

FILE NO. SVM-06010

Press [ ]

button.

Is transmission

mark indicated?

Press RESET button

on remote control

with tip of pencil.

Is receiver on

indoor unit exposed

to direct sunlight?

Is there any

thyristor fluorescent

light nearby?

Does indoor unit

operate when

moving remote control

near receiver or

indoor unit?

Press [ ]

button.

Batteries are

exhausted.

Is transmission mark

indicated?

Does indoor unit

beep and operate?

Remote control

is defective.

Does indoor unit

start to operate by

automatic restart

function?

Does radio sound

is affected by

remote control when

a signal is transmitted

at distance of 5 cm

from radio?

P.C. board is

defective.

Keep indoor unit

away from

thyristor

fluorescent light.

Avoid direct

sunlight.

Replace

P.C. board.

Replace

batteries.

Normal

operation

Replace

remote control.

The unit does not beep at all. OPERATION lamp on indoor unit is not indicated.

Note : After replacing batteries,

press the RESET button with a tip of a pencil.

YES

NO NO

YES

9-10. Troubleshooting for Remote Control

– 64 –

FILE NO. SVM-06010

10. PART REPLACEMENT

10-1. Indoor Unit

How to remove the front panel

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

2) Pull the inlet grille toward you to open it and remove the inlet grille.

3) Take off the right side of air filter.

4) Pull out the plasma air purifier and remove 4 screws fixing the front panel before open the horizontal louver and then remove the front panel from back

How to mount the front panel

1) Mount the front panel with the inverse procedure of

"How to remove the front panel".

2) Push 3 places (right, left and center) of the air outlet.

3) Check the gap between the front panel and the back body. If you operate the air conditioner in cooling or dry operation without pushing the 3 places, the surface of the front panel may be covered with frost and have dewdrops.

Open the horizontal grille right below by hand.

body by pulling it toward you.

Pull the lower side of the front panel toward you

6) until it touches the horizontal grille to remove it.

1) Remove the front panel with the procedure 1.

2) Remove the screw fixing the electrical part box.

3) Remove the drain guide.

4) Remove the connector (5P) for the fan motor and the connector (6P) for the louver motor from the microcomputer assembly.

5) Remove the screw for the earth, and pull the electrical part base toward you to remove it from the main unit.

6) Pull out the TC sensor from the sensor holder.

1 Front panel

2 Electrical part

assembly

No. Part name Procedures Remarks

When assembling the electrical parts assembly, make the connecting cable U-shaped and put it in the drain pan.

(3) Drain guide

(6) TC sensor

(3) Drain guide

(2) screws

(5) screws

5P 6P

(4)

(3)

4-screws

(2)

– 65 –

FILE NO. SVM-06010

(1) Center shafts

(2) Left shafts

Pipe holder

(3) 2 screws

(4) 2 screws

(2) Screw

Bearing base

(2) Set screw

(3) Screws

Bearing base

Bearing

Motor fixture

(4) BODY (R)

(3) 2 screws

(4)

1) Remove center 2 shafts of the horizontal grille from the back body.

2) Remove left shaft of the horizontal grille from the back body.

3) Remove the horizontal grille from the back body.

1) Remove the front panel, electrical parts assembly and the horizontal grille with procedure 2 and 3.

2) Remove the screw on the rear side of the main unit to remove the pipe holder.

3) Remove 2 screws fixing the heat exchanger and the bearing base.

4) Remove 2 screws fixing the heat exchanger fixtures (upper and lower) and the back body then pull out the upper side of the heat exchanger slowly.

1) Remove the front panel, electrical parts assembly, horizontal grille and the heat exchanger with procedure 4.

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

3) Remove 2 screws fixing the bearing base and the back body.

4) Pull the cross flow fan toward you.

1) Remove the front panel, electrical parts assembly, horizontal grille, heat exchanger and the cross flow fan with procedure 5.

2) Remove the bearing from the bearing base. If the housing protrudes from the base bearing, put the housing in position and assemble the bearing to the bearing base.

1) Remove the front panel, electrical parts assembly, horizontal grille, and the heat exchanger with procedure 4.

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

3) Remove 2 screws of the motor fixture.

4) Remove the lower side of the body (R) and move it right to remove it.

5) Remove the motor from the motor fixture.

3 Horizontal grille

4 Heat exchanger

5 Cross flow fan

6 Bearing base

7 Fan motor

No. Part name Procedures Remarks

When assembling the cross flow fan, fix it with the set screw at the position where the gap between the back body and the right surface of the cross flow fan is 8 mm.

FILE NO. SVM-06010

10-2. Outdoor Unit

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

3) Remove 2 cord clamps (4 screws ∅4 x 16L) and disconnect the power supply cord and connecting cable after removing 6 screwson on the terminal block and 1 ground screw on the electrical parts base.

1 Common

procedure

No. Part name Procedures Remarks

Front cabinet

Side cabinet

2) Remove the packed valve cover and the electrical parts cover (2 screws ∅4 x 10L)

4) Remove the top cabinet. (7 screws ∅ 4 x 10L) (Pulling out upward)

5) Remove the top cabinet. (2 screws ∅ 4 x 10L) (Pull the front right portion toward you, and remove it pulling out upward)

Top cabinet

Front

cabinet

2 screws

∅4 x 10L

4 screws ∅4 x 16L

2 Cord clamps

7 screws ∅4 x 10L

Packed valve cover

− 66 −

FILE NO. SVM-06010

1) Perform the common procedure 1

2) Remove the capacitor band. (1 screw ∅4 x 10L)

3) Disconnect the lead wires from the capacitor terminal.

1) Perform the common procedure 1

2) Remove the fixing screw. (1 screw ∅4 x 10L)

3) Disconnect the lead wires from the capacitor terminal.

1) Perform the common procedure 1

2) Remove the fixing screw. (2 screws ∅4 x 16L)

3) Disconnect the lead wires from the terminal.

1) Perform the common procedure 1

2) Remove the fixing screw. (1 screws ∅4 x 10L)

3) Disconnect the lead wires from the terminal.

2 Running

capacitor for compressor

3 Running

capacitor for fan motor

4 Magnetic

contactor

5 Spark killer

(Cooling only model)

Spark killer

Running capacitor for compressor

Running capacitor for fan motor

Magnetic contactor

Cooling only model

Procedures

Remarks

Part name

No.

Heat pump model

1) Perform the common procedure 1

2) Remove the fixing screw. (2 screws ∅4 x 10L)

3) Disconnect the housing from the P.C. Board.

1) Perform the common procedure 1

2) Disconnect the lead wires from the P.C. Board.

3) Remove P.C.Board after unhooking 4 clams.

6 Transformer

(Heat pump model)

7 Transformer

(Heat pump model)

Running capacitor for compressor

Running capacitor for fan motor

Magnetic

P.C. Board

Transformer

− 67 −

FILE NO. SVM-06010

11. EXPLODED VIEWS AND PARTS LIST

11-1. Indoor Unit (E-Parts Assy)

− 68 −

Location Part Location Part

No. No. No. No.

402 43T60365 TERMINAL BLOCK; 3P 411 43T69537 PC BOARD (FOR RAS-18NKDX5-T) 403 43T50004 SENSOR; HEAT EXCHANGER 411 43T69538 PC BOARD (FOR RAS-24NKDX5-T) 404 43T50314 SENSOR;THERMOSTAT 411 43T69539 PC BOARD (FOR RAS-24NKHD-E5) 405 43T69482 PC BOARD ASSY;WRS-LED 412 43T51307 MICRO SWITCH 407 43T62003 CORD CLAMP 413 43T63310 SENSOR HOLDER

Description Description

411

407

412

413

FILE NO. SVM-06010

11-2. Indoor Unit

− 69 −

232

214

215

220

219

218

227

208

228

229

222

221

213

235

233

204

202

203

201

212

223

210

207

216

230

209

226

224

211

231

238

237

236

234

217

Electric Part Assembly

Location Part Location Part

No. No. No. No.

201 43T00412 FRONT PANEL ASSY 223 43T79007 GUIDE DRAIN 202 43T09353 GRILLE ASSY 224 43T39016 FIX FOR MOTOR 203 43T80306 AIR FILTER (L) 226 43T21371 MOTOR FAN 204 43T80313 AIR FILTER (R) 227 43T20314 FAN; CROSS FLOW 207 43T03010 BODY; RIGHT 228 43T22309 ASM-M-BEARING 208 43T03011 BODY; LEFT 229 43T39015 BASE; BEARING 209 43T03012 HIDE; CLAW 230 43T03340 BACK BODY ASSY 210 43T09345 LOUVER-H (FOR RAS-18,24NKDX5-T) 211 43T70301 HOSE ASSY;DRAIN 230 43T03343 BACK BODY ASSY 212 43T21367 STEPPING MOTOR (FOR RAS-24NKHD-E5) 213 43T44310 REFRIGERATION CYCLE ASSY 231 43T07022 HOLDER; PIPE

(FOR RAS-24NKHD-E5) 232 43T82007 PLATE; INSTALLATION

213 43T44372 REFRIGERATION CYCLE ASSY 234 43T69402 WIRELESS REMOCON

(FOR RAS-18,24NKDX5-T) (FOR RAS-24NKHD-E5) 214 43T47311 PIPE; DELIVERY 234 43T69403 WIRELESS REMOCON 215 43T47016 PIPE; SUCTION (FOR RAS-18,24NKDX5-T) 216 43T49010 PIPE; SHIELD 235 43T83003 HOLDER; REMOTE CONTROLLER 217 43T19003 FIX-P-SENSOR 236 43T62029 COVER; TERMINAL 218 43T49009 SPRING 237 43T69496 ELECTRICAL SUPPLY ASSY 219 43T49036 PLATE; EVA-SEAL (FOR RAS-18,24NKDX5-T) 220 43T49039 HOLDER; PLATE EVA-SEAL 237 43T69497 ELECTRICAL SUPPLY ASSY 221 43T49038 PLATE; EVA-SEAL (FOR RAS-24NKHD-E5) 222 43T49037 HOLDER; PLATE EVA-SEAL 238 43T69499 ELECTRICAL PURIFIER ASSY

Description Description

FILE NO. SVM-06010

11-3. Outdoor Unit (RAS-24NAH-E)

− 70 −

Location Part Location Part

No. No. No. No.

1 43T42324 BASE PLATE ASSEMBLY 23 43T39318 MOTOR BASE 2 43T41370 COMPRESSOR(Made in China) 24 43T19330 PACKED VALVE COVER 3 43T 49011 SPRING BASE(UPPER) 25 43T00455 UPPER CABINET 4 43T 49012 SPRING BASE (LOWER) 26 43T96304 BUSHING 5 43T 49019 SPRING; BUFFER 27 43T62325 ELECTRIC PART COVER 6 43T 97307 COMPRESSOR BOLT (M6) 28 43T61306 ELECTRIC PARTS BASE 7 43T 43372 CONDENSER ASSEMBLY 29 43T52305 MAGNETIC CONTACTOR 8 43T 00448 FIXING PLATE VALVE 30 43T55340 MF CAPACITOR

9 43T 46308 VALVE;PACKED 6.35 DIA 31 43T55333 MF-CAPACITOR 10 43T46338 VALVE,PACKED 15.88 DIA 32 43T60352 TERMINAL BLOCK; 6P 11 43T47331 BONNET, 6.35 DIA 35 43T19331 FIN GUARD 12 43T47334 BONNET; 15.88 DIA. 36 43T00456 UPPER FRONT CABINET; A 13 43T47013 CAPILLARY TUBE; 2.0 DIA 37 43T00457 UPPER FRONT CABINET; B 14 43T00449 FRONT CABINET 38 43T71301 HANDLE 15 43T00453 LEFT CABINET 39 43T46337 4 WAY VALVE 16 43T00454 RIGHT CABINET 40 43T46339 COIL;V-4WAY;AC220-240V 50Hz 17 43T21378 FAN MOTO R;AC220-240V 50Hz 41 43T69059 SENSOR; TE 18 43T20319 PROPELLER FAN 42 43T69060 SENSOR; TD 19 43T47001 NUT FLANGE 43 43T79305 DRAIN NIPPLE 20 43T19329 FAN GUARD 44 43T58301 TRANSFORMER; TT-05 21 43T04302 PARTITION 45 43T69336 PC Board 22 43T39317 MOTOR BASE CONNECTION PLATE 46 43T60325 FILTER;CLAMP

Description Description

– 72 –

FILE NO. SVM-06010

11-5. Outdoor Unit (RAS-24N2AX-T)

Location Part Location Part

No. No. No. No.

1 43T42324 BASE PLATE ASSEMBLY 20 43T19329 FAN GUARD 2 43T41370 COMPRESSOR(Made in China) 21 43T04302 PARTITION 3 43T49011 SPRING BASE(UPPER) 22 43T39317 MOTOR BASE 4 43T49012 SPRING BASE (LOWER)

CONNECTION PLATE

5 43T49019 SPRING; BUFFER 23 43T39318 MOTOR BASE 6 43T97307 COMPRESSOR BOLT (M6) 24 43T19330 PACKED VALVE COVER 7 43T43370 CONDENSER ASSEMBLY 25 43T00455 UPPER CABINET 8 43T00448 FIXING PLATE VALVE 26 43T96304 BUSHING

9 43T46308 VALVE;PACKED 6.35 DIA 27 43T62325 ELECTRIC PART COVER 10 43T46338 VALVE,PACKED 15.88 DIA 28 43T61306 ELECTRIC PARTS BASE 11 43T47331 BONNET, 6.35 DIA 29 43T52305 MAGNETIC CONTACTOR 12 43T47334 BONNET; 15.88 DIA. 30 43T55340 MF CAPACITOR 13 43T47013 CAPILLARY TUBE; 2.0 DIA 31 43T55341 CAPACITOR;PLASTIC-FILM 14 43T00449 FRONT CABINET 32 43T60352 TERMINAL BLOCK; 6P 15 43T00453 LEFT CABINET 33 43T33002 SPARK-KILLER 16 43T00454 RIGHT CABINET 35 43T19331 FIN GUARD 17 43T21377 FAN MOTOR;AC220-240V 50Hz 36 43T00456 UPPER FRONT CABINET; A 18 43T20319 PROPELLER FAN 37 43T00457 UPPER FRONT CABINET; B 19 43T47001 NUT FLANGE 38 43T71301 HANDLE

Description Description

FILE NO. SVM-06010

11-3. Outdoor Unit (RAS-18N2AX-T)

− 71 −

Location Part Location Part

No. No. No. No.

1 43T42324 BASE PLATE ASSEMBLY 20 43T19329 FAN GUARD 2 43T41369 COMPRESSOR(Made in China) 21 43T04302 PARTITION 3 43T49011 SPRING BASE(UPPER) 22 43T39317 MOTOR BASE CONNECTION PLATE 4 43T49012 SPRING BASE (LOWER) 23 43T39318 MOTOR BASE 5 43T49019 SPRING; BUFFER 24 43T19330 PACKED VALVE COVER 6 43T97307 COMPRESSOR BOLT (M6) 25 43T00455 UPPER CABINET 7 43T43370 CONDENSER ASSEMBLY 26 43T96304 BUSHING 8 43T00448 FIXING PLATE VALVE 27 43T62325 ELECTRIC PART COVER

9 43T46308 VALVE;PACKED 6.35 DIA 28 43T61306 ELECTRIC PARTS BASE 10 43T46338 VALVE,PACKED 15.88 DIA 29 43T52302 MAGNETIC CONTACTOR; 11 43T47331 BONNET, 6.35 DIA AC220-240V 50Hz 12 43T47334 BONNET; 15.88 DIA. 30 43T55337 MF CAPACITOR 13 43T47013 CAPILLARY TUBE; 2.0 DIA 31 43T55341 CAPACITOR;PLASTIC-FILM 14 43T00449 FRONT CABINET 32 43T60352 TERMINAL BLOCK; 6P 15 43T00453 LEFT CABINET 33 43T33002 SPARK-KILLER 16 43T00454 RIGHT CABINET 35 43T19331 FIN GUARD 17 43T21377 FAN MOTOR;AC220-240V 50Hz 36 43T00456 UPPER FRONT CABINET; A 18 43T20319 PROPELLER FAN 37 43T00457 UPPER FRONT CABINET; B 19 43T47001 NUT FLANGE 38 43T71301 HANDLE

Description Description

– 87 –

FILE NO. SVM-03010(1)

TOSHIBA CARRIER (THAILAND) CO.,LTD.

144/9 MOO 5, BANGKADI INDUSTRIAL PARK, TIVANON ROAD, TAMBOL BANGKADI,

AMPHUR MUANG, PATHUMTHANI 12000, THAILAND.

Toshiba RAS-24NKHD-E5, RAS-24NAH-E, RAS-18NKDX5-T, RAS-18N2AX-T, RAS-24NKDX5-T Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual