Toshiba RAS-18NKP-E, RAS-18NA-E user guide manual

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SERVICE MANUAL

AIR CONDITIONER

RAS-18NKHP-E / RAS-18NAH-E

RAS-18NKP-E / RAS-18NA-E

RAS-24NKP-E / RAS-24NA-E

RAS-B18NKPX / RAS-18N2AX

RAS-24NKPX / RAS-24N2AX

FILE NO. SVM-06004

SPLIT WALL TYPE

24 Class18 Class

May, 2006

CONTENTS

1. SPECIFICATIONS

2. CONSTRUCTION VIEWS

2-1 Indoor Unit 2-2 Outdoor Unit (24 Class) 2-3 Outdoor Unit

3. WIRING DIAGRAM

3-1

RAS-18NKHP-E / RAS-18NAH-E RAS-24NKP-E / RAS-24NA-E, RAS-24NKPX / RAS-24N2AX

3-2

RAS-18NKP-E / RAS-18NA-E, RAS-18NKPX / RAS-18N2AX

3-3

4. SPECIFICATION OF ELECTRICAL PARTS

4-1 Indoor Unit 4-2 Outdoor Unit (RAS-18NAH-E) 4-3 Indoor Unit (RAS-24NKP-E, RAS-24NKPX,

4-4 Outdoor Unit (RAS-24NA-E, RAS-24N2AX) 4-5 Outdoor Unit (RAS-18NA-E, RAS-18N2AX)

(18 Class)

(RAS-18NKHP-E)

RAS-18NKP-E, RAS-18NKPX)

FILE NO. SVM-06004

5. REFRIGERATION CYCLE DIAGRAM

5-1

RAS-18NKHP-E / RAS-18NAH-E RAS-24NKP-E / RAS-24NA-E,

5-2

RAS-24NKPX / RAS-24N2AX

5-3

RAS-18NKP-E / RAS-18NA-E

RAS-B18NKPX / RAS-18N2AX

5-4

6. CONTROL BLOCK DIAGRAM

6-1 RAS-18NKHP-E 6-2 RAS-18NKP-E / RAS-18NA-E, RAS-B18NKPX / RAS-18N2AX

RAS-24NKP-E / RAS-24NA-E, RAS-24NKPX, RAS-24N2AX

7. OPERA

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 7-10 QUIET Mode 7-11 COMFORT SLEEP mode

TION DESCRIPTION

– 1 –

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 9-8 Troubleshooting for P.C. Board 9-9 Troubleshooting for Remote Control

FILE NO. SVM-06004

Wire)

10. PARTS REPLACEMENT

10-1 Indoor Unit 10-2 Outdoor Unit (RAS-24NA-E, RAS-24N2AX) 10-3 Outdoor Unit (RAS-18NAH-E, RAS-18NA-E, RAS-18N2AX)

11. EXPLODED VIEWS AND PARTS LIST

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

(RAS-18NAH-E)

− 2 −

1. SPECIFICATIONS

FILE NO. SVM-06004

MODEL

ITEM Cooling Cooling

Capacity kW

Power source V 220 – 240

Power consumption W 2350 2440 2350 2440 Power factor % 99 90 99 90

Running current A

Indoor/Outdoor Starting current A Moisture removal lit/h

Noise

Refrigerant

Refrigerant control Capillary tube

Interconnection Connection type Flare connection pipe Maximum length

INDOOR UNIT

Dimensions Width mm 998

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

Air volume Medium fan m3/h

Fan motor output W Air filter Honeycomb woven filter with PP frame

OUTDOOR UNIT

Dimensions Width mm 780

Net weight kg

Condenser type Finned tube Outdoor fan type Propeller fan

Airflow volume m3/h

Fan motor output W 42

Compressor

Safety device IOL Louver type Automatic louver Usable outdoor temperature range °C 21 ~ 43

Indoor (H/M/L) dB 45/43/41/39/37 Outdoor (220 – 240 V) dB 56-57 Name of refrigerant R22 Rated amount kg

Gas side size Connection type Flare connection Liquid side size

(One way) Maximum height

difference

Height mm 298

Depth mm 220

High fan m3/h 900

Low fan m3/h

Height mm 715

Depth mm 290

Model

Output W

6.40 6.45 6.40 6.45

Phase 1∅

Hz 50

0.3/10.5 0.3/11.0 0.3/10.50 0.3/11.0

m10

2400

RAS-24NKP-E

RAS-24NA-E

220 V 240 V 220 V 240 V

2.7

1.68

∅15.88

∅6.35

15*

25*

RAS-24NKP-E

RAS-24NA-E

750

625

2600

PH400X3CS-4KT1

1800

RAS-24NKPX RAS-24N2AX

RAS-24NKPX

RAS-24N2AX

2400 2600

– 3 –

FILE NO. SVM-06004

MODEL

ITEM Cooling Heating Cooling Cooling

Capacity kW

Phase 1∅

Power source V 220 – 240

Hz 50 Power consumption W Power factor % 95 88 94 86 92 85 92 85

Running current

Starting current A 42 Moisture removal lit/h 2

Noise

Refrigerant

Refrigerant control Capillary tube

Interconnection Connection type Flare connection pipe Maximum length

INDOOR UNIT RAS-18NKHP-E RAS-18NKP-E RAS-B18NKPX

Dimensions Width mm 998

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

Air volume Medium fan m3/h 650 700 650

Fan motor output W 30 Air filter Honeycomb woven filter with PP frame

OUTDOOR UNIT RAS-18NAH-E RAS-18NA-E RAS-18N2AX

Dimensions Width mm 780

Net weight kg 43 41 Condenser type Finned tube

Outdoor fan type Propeller fan

Airflow volume m3/h

Fan motor output W

Compressor

Safety device IOL, Td Sensor IOL Louver type Automatic louver Usable outdoor temperature range °C 15 ~ 43 –10 ~ 24 21 ~ 43

Note *1 Chargeless pipe

*2 Maximum pipe

Indoor/Outdoor 8.9 9.4 8.4 9.2

Indoor (H/M/L) dB Outdoor (220 – 240 V) dB 52-53 53-54 51 52 51 52 Name of refrigerant R22 Rated amount kg 1.00

Gas side size Connection type Flare connection Liquid side size

(One way) 20* Maximum height

difference

Height mm 298

Depth mm 220

High fan m3/h 900 900 900

Low fan m3/h 530 570 530

Height mm 550

Depth mm 290

Model

Output W

RAS-18NKHP-E

RAS-18NAH-E

220 V 240 V 220 V 240 V

5.05 5.05 5.80 5.90 5.20 5.25 5.20 5.25

1920 2040 1800 1950

0.3 0.3 0.3

0.3

44/42/39/37/35

1.53

2350

2550

RAS-18NKP-E

RAS-18NA-E

220 V 240 V 220 V 240 V

1910 1990 1910 1990

0.2/9.15 0.2/9.40 0.3/9.15 0.3/9.40

44/42/39/37/35

∅12.7

∅6.35

15*

550

780 290

2350

PH340X3C-4KT1

2550

1500

RAS-B18NKPX

RAS-18N2AX

2350

2550

– 4 –

Note : 1

• Capacity is based on the following temperature conditions.

FILE NO. SVM-06004

Condition

Temperature

Indoor unit inlet air temperature

Outdoor unit inlet air temperature

Note : 2

• Charge refrigerant according to the table below.

Refrigerant

*1 No need to charge

extra refrigerant

*2 Need to charge

extra refrigerant

RAS-24NKP-E / RAS-24NA-E

RAS-24NKPX / RAS-24N2AX

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

(DB) 27°C 20°C

(WB) 19°C 15°C

(DB) 35°C 7°C

(WB) 24°C 6°C

15 m or less 15 m or less

JIS B8615-1

Cooling Heating

RAS-18NKHP-E / RAS-18NAH-E

RAS-18NKP-E / RAS-18NA-E

RAS-B18NKPX / RAS-18N2AX

– 5 –

2-1. Indoor Unit

FILE NO. SVM-06004

CONSTRUCTION VIEWS

Knock out system

Back body

Front panel

Grille inlet

298

Air inlet

Air outlet

998

Plasma air purifierHeat exchangerAir filter

220

Knock out system

Outline of indoor unit

Connection pipe (0.39 m) (For 24 series and RAS-18NKDX4-T2 : Flare ∅15.88)

(For 18 series except RAS-18NKDX4-T2 : Flare ∅12.7)

763.5

90 or more

Minimum distance

to ceiling

298

∅

100

998

450

Installation Plate outline

− 6 −

Connection pipe (0.49 m) (Flare ∅6.35)

Drain hose (0.54 m)

100

Wireless remote control

(For stud bolt ∅6)

(For stud bolt ∅8 − ∅10)

41 55 5555

∅

163

2-2. Outdoor Unit (24 Class)

600

50 36

FILE NO. SVM-06004

124109

6 hole

321

307

5.5

A Detail Drawing (Back leg)

HANDLE

290

321

715

25 Drain outlet

FAN-GUARD

436

275

90 600 90 69

2Ø11x14 Hole

(For

Ø8-Ø

10 anchor bolt)

307

321

Hole

11x14 Hole

36 50

B Detail Drawing (Front leg)

321 342

HANDLE

COVER-PV

100 or more

321

100 or more

Z View

600

Air inlet

Air out

let

00 or more

Installation dimension

600 or more

129

11 Long holes(For

Service port

10 anchor bolt)

Ø8-Ø

Electrical part cover

Liquid side (Flare Ø6.35)

Gas-side (Flare Ø15.88)

− 7 −

2-3. Outdoor Unit (18 Class)

600

321

307

A detail Drawing (Back leg)

R5.5

6 hole

321

25 Drain outlet

FAN-GUARD

436

109 124

11 x 14

(For 8 -

Hole

10 anchor bolt)

FILE NO. SVM-06004

307

321

6 hole

11x14 hole

B Detail Drawing (Front leg)

36 50

COVER-PV

290

550

275

321 342

Electrical part cover

Liquid side (Flare 6.35)

Gas side (Flare 12.7)

Service port

Z View

9060090

129

100 or more

321

100 or more

600

Air intlel

Air outlel

600 or more

Installation dimension

− 8 −

600 or more

4x 11 Long holes(For 8- 10 anchor bolt)

3. WIRING DIAGRAM

3-1. RAS-18NKHP-E / RAS-18NAH-E

COLOR IDENTIFICATION

BRW : BROWN RED : RED WHI : WHITE YEL : YELLOW BLU : BLUE BLK : BLACK GRY : GRAY PNK : PINK ORN : ORANGE GRN : GREEN GRN&YEL : GREEN & YELLOW

CN30 CN31

P04BLK

DSA

Varistor

F01

250V6.3A

MAIN P.C. BOARD (WP-003)

Louver motor

BLU

PNK

5 223311 5

FILE NO. SVM-06004

Infrared rays receive

and Indication parts

BLU

RED

YEL

ORN

BRW

CN07

BLU

1 2 3 4 65 10

98 1071 2 3

4 65 4 6

BLU

5 64

321

CN25

9871 2 3

WHI

BLU

CN13

8 9

+12 VDC

+5 VDC

WP-003

OUTDOOR TERMINAL BLOCK

COMPRESSOR TERMINAL

POWER SUPPLY 220- 240 V ~ 50 Hz

BLK

RED

BLK

RED

WHI PNK

INDOOR TERMINAL BLOCK

FERRITE CORE

RED

MAGNETIC

CONTACTOR

CAPACITOR

COMPRESSOR

BLK

GRN&YEL

52C

CN23

RED

WHI RED

GRN&YEL

CHASSIS

CAPACITOR

FAN MOTOR

Serial Signal

circuit

INDOOR UNIT

OUTDOOR UNIT

TRANSFORMER

COIL FOR 4 WAY VALVE

BLK BLK

RED RED

BLK BLK WHI RED GRY

BLU

YEL

BLU

GRY

BRW

YEL

1 1

145 C

TEMP FUSE

1 2

CN06

CN05

CN01

CN11

313

CN02

BLK BLK

– 9 –

66554

MAIN P.C. BOARD (MCC-890)

TNR

SG01

R74

F01

250VAC T6. 3A

TNR R73

RY07

CR11

RY05

CR12

CR13

CN03

1 1

RY06

CN07

CN08

DISCHARGE PIPE SENSOR (TD)

BLU

1 2 3

BLU

BLK

1 2 3

BLK

HEAT EXCHANGER SENSOR (TE)

3-2. RAS-24NKP-E / RAS-24NA-E

RAS-24NKPX / RAS-24N2AX

COLOR IDENTIFICATION

BRW : BROWN RED : RED WHI : WHITE YEL : YELLOW BLU : BLUE BLK : BLACK GRY : GRAY PNK : PINK ORN : ORANGE GRN : GREEN GRN&YEL : GREEN & YELLOW

P04

BLK

DSA

F01

6.3A

CN30 CN31

CN27

GRN&YEL

Varistor

250V

MAIN P.C. BOARD (WP-003)

Varistor

Louver motor

BLU

PNK

5 223311

FILE NO. SVM-06004

Infrared rays receive

and Indication parts

1 2 3 4 6 10

BLU

YEL

RED

BRW

ORN

CN07

BLU

1 2 3 4 65 10

321

Power supply

circuit

Control Fan motor circuit

GRY

BRW

YEL

5 98

BLU

5 64

105 64321

8 9

7 7

BLU

7 7

8 9

CN25

BLU

WHI

CN13

BLK2BLK

CN03

CN01

BLK

OUTDOOR TERMINAL BLOCK

POWER SUPPLY 220-240 V ~ 50 Hz

BLK

RED

INDOOR TERMINAL BLOCK

RED

BLK BLK

SPARK KILLER

A2 A1

52C

RED

1/L1 2/T1

3/L2 4/T2

5/L3

6/T3

GRN&YEL

RED

CAPACITOR

GRY

CHASSIS

RED

WHI PNK

COMPRESSOR

INDOOR UNIT

OUTDOOR UNIT

CAPACITOR

WHI

RED

BLK

C OMP R ES S O R TE R MIN AL

145 C

TEMP FUSE

F AN M OT OR

3 3

Thermo. sensor

66554

(TA)

Heat exchanger sensor

(TC)

B LK

MAGNETIC CONTACTOR

– 10 –

3-3. RAS-18NKP-E / RAS-18NA-E, RAS-18NKPX / RAS-18N2AX

COLOR IDENTIFICATION

BRW : BROWN

BLK

CN27

GRN&YEL

RED : RED WHI : WHITE YEL : YELLOW BLU : BLUE BLK : BLACK GRY : GRAY

PNK : PINK ORN : ORANGE GRN : GREEN GRN&YEL : GREEN & YELLOW

P04

DSA F01

6.3A

CN30 CN31

Varistor

250V

MAIN P.C. BOARD (WP-003)

Varistor

Louver motor

BLU

PNK

5 223311

YEL

RED

BRW

ORN

CN07

GRY

BRW

YEL

FILE NO. SVM-06004

Infrared rays receive

and Indication parts

1 2 3 4 6 10

BLU

1 2 3 4 65 10

321

Power supply circuit

Control

Fan motor

circuit

5 98

BLU

5 64

105 64321

8 9

CN25

BLU

WHI

CN13

8 9

BLK2BLK

CN03

CN01

BLK

OUTDOOR TERMINAL

BLOCK

POWER SUPPLY

220-240V ~ 50Hz

BLK

MAGNETIC

CONTACTOR

BLK

RED

INDOOR TERMINAL BLOCK

RED

GRN&YEL

RED

BLK

CHASSIS

SPARK KILLER

(or A)

(or B)

INDOOR UNIT

OUTDOOR UNIT

GRN&YEL

GRY

145 C

TEMP FUSE

Thermo. sensor

66554

(TA)

Heat exchanger sensor

(TC)

CAPACITOR

RED

WHI PNK

COMPRESSOR

COMPRESSOR TERMINAL

CAPACITOR

RED

BLK

WHI

RED

BLK

FAN MOTOR

– 11 –

FILE NO. SVM-06004

4. SPECIFICATION OF ELECTRICAL PARTS

4-1. Indoor Unit (RAS-18NKHP-E)

No. Parts name Type Specifications

1 Fan motor (for indoor) AFS-220-31A AC 200 − 240V, 31W 2 Thermo sensor (TA-sensor) ——— 10 kΩ at 25°C 3 Micro Power Module (M01) µRM1260V DC 390 V, Secondary DC 12 V, 5 V 4 Microcontroller TMP87CM40AN 5 Heat exchanger sensor

(TC-sensor) 6 Line filter (L01) LC*SS11V-06270 27mH, 600mA 7 Diode (DB01) D3SBA60 4 A, 600 V 8 Capacitor (C63) KMH400VSSN47M22S 4.7µF, 400 V 9 Fuse (F01) BET6.3A T6.3 A, 250 V

10 Varistor (R21, R22) 15G561K 560 V

11 Resistor (R319) RF-2TK5R6 5.6Ω , 2 W 12 Louver motor MP35EA12 Output (Rated) 2 W, 10 poles, 1 phase,

——— 10 kΩ at 25°C

DC 12 V

4-2. Outdoor Unit (RAS-18NAH-E )

No. Parts name Type Specifications

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

1 Compressor PH340X3C-4KT1 Winding resistance (Ω) C-R C-S

(at 20°C) 1.46 2.47 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

(for fan motor)

Running capacitor

(for compressor)

Solenoid coil

(for 4-way valve)

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

7 Magnetic contactor

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

451305L AC 450 V, 3.0µF

RS44B506U0218S AC 440 V, 50µF

VHV (STF) AC 220 – 240 V

CLK-26J

220 − 240 V, 50 Hz

– 12 –

FILE NO. SVM-06004

4-3. Indoor Unit (RAS-24NKP-E, RAS-24NKPX,

RAS-18NKP-E, RAS-18NKPX)

No. Parts name Type Specifications

(TC-sensor) 6 Line filter (L01) LC*SS11V-06270 27mH, 600mA 7 Diode (DB01) D3SBA60 4 A, 600 V 8 Capacitor (C63) KMH400VSSN47M22S 4.7µF, 400 V 9 Fuse (F01) BET6.3A T6.3 A, 250 V

10 Varistor (R21, R22) 15G561K 560 V

11 Resistor (R319) RF-2TK5R6 5.6Ω, 2 W 12 Louver motor MP35EA12 Output (Rated) 2 W, 10 poles, 1 phase,

13 Relay : (RY04) G5NB-1A Coil DC 12V, 16.7mA, Contact AC 250V, 1A

——— 10 kΩ at 25°C

DC 12 V

4-4.

Outdoor Unit (RAS-24NA-E, RAS-24N2AX)

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

2 Fan motor (for outdoor)

Running capacitor 3

(for fan motor)

Running capacitor

(for compressor)

5 Magnetic contactor

RS44B506U0218S

FG-240-42A

451305L

A35

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

AC 450 V, 3.0µF

AC 440 V, 50µF

220 − 240 V, 50 Hz

1.13

128 126

2.10

4-5. Outdoor Unit (RAS-18NA-E, RAS-18N2AX)

No. Parts name Type Specifications

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

1 Compressor PH340X3C-4KT1 Winding resistance (Ω) C-R C-S

(at 20°C) 1.46 2.47 Output (Rated) 42 W, 6 poles, 1 phase, 220 – 240 V, 50 Hz

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

(at 20°C) 188 289

Running capacitor 3

(for fan motor)

Running capacitor 4

(for compressor) 5 Magnetic contactor CLK-26J 220 – 240 V, 50 Hz

451205L AC 450 V, 2.0µF

RS44B506U0218S AC 440 V, 50µF



− 13 −

5. REFRIGERATION CYCLE DIAGRAM

5-1. RAS-18NKHP-E / RAS-18NAH-E

Cooling

Indoor unit

Evaporator

FILE NO. SVM-06004

0.39 m (Connecting pipe)

∅

12.7

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

Cooling

Heating

Packed valve

(∅12.7)

Gas container connection (Reinstall etc.)

Heating

4-way valve

Cooling

Cooling Heating

Compressor

Accumulator

2JS350D5A02

Condenser

Propeller fan

Outdoor unit

Cross flow fan

Packed valve

(

∅

6.35)

Capillary tube

∅2.0x1400 s

Capillary tube

∅0.6x600 s

DryerDryer

Mark ( ) means check points of Gas Leak

Refrigerant R22 1.15 kg

0.49 m (Connecting pipe)

∅

6.35

Ambient temp.

50 Hz

Standard

pressure

(MPaG)

Surface temp. of heat

exchanger interchanging

pipe

(°C)

Fan speed

(indoor)

conditions DB/WB

(°C)

Indoor Outdoor

Standard 1.66 43.0 High 20/– 7/6

Heating High temperature*1 2.18 ~ 2.34 47.0 ~ 55.0 Low 27/– 24/18

Low temperature 1.2 34.0 High 20/––10/–10

Standard 0.48 10.8 High 27/19 35/24

Cooling High temperature 0.6 15.0 High 32/23 43/26

Low temperature 0.32 1.8 Low 21/15 21/15

Note : Measure the heat exchanger temperature at the center of U-bend. (By means of TC sensor.) *1 : During heating overload, the high temperature limit control operation is included.

– 14 –

5-2. RAS-24NKP-E / RAS-24NA-E

RAS-24NKPX / RAS-24N2AX

FILE NO. SVM-06004

Indoor unit

Cooling

0.39 m (Connecting pipe)

∅

1 5.88

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

Cooling

Compressor

Packed valve

(∅15.88)

Gas container connection (Reinstall etc.)

PH400X3CS-4KT1

Evaporator

Cross flow fan

0.49 m (Connecting pipe)

∅

6 .35

Packed valve

(∅6.35)

Capillary tube

700 s

∅2.4x

Condenser

Refrigerant R22 1.68 kg

Cooling

Propeller fan

Outdoor unit

Mark ( ) means check points of Gas Leak

Ambient temp.

50 Hz

Standard

pressure

(MPaG)

Surface temp. of heat

exchanger interchanging

pipe

(°C)

Fan speed

(indoor)

conditions DB/WB

(°C)

Indoor Outdoor

Standard 0.43 8.5 High 27/19 35/24

Cooling High temperature 0.56 12.5 High 32/23 43/26

Low temperature 0.32 2.0 Low 21/15 21/15

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

– 15 –

5-3. RAS-18NKP-E / RAS-18NA-E

FILE NO. SVM-06004

Indoor unit

Evaporator

(Connecting pipe)

0.39 m ∅12.7

Cross flow fan

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

Compressor

Packed valve

(∅12.7)

PH340X3C-4KT1

Condenser

Propeller fan Outdoor unit

Packed valve

(∅6.35)

Capillary tube

∅2.0x600 s

Refrigerant

0 kg

R22 1.

Mark ( ) means check points of Gas Leak

0.49 m (Connecting pipe) ∅6.35

Ambient temp.

50 Hz

Standard

pressure

(MPaG)

Surface temp. of heat

exchanger interchanging

pipe

(°C)

Fan speed

(indoor)

conditions DB/WB

(°C)

Indoor Outdoor

Standard 0.41 11.0 High 27/19 35/24

Cooling High temperature 0.56 15.0 High 32/23 43/26

Low temperature 0.32 2.0 Low 21/15 21/15

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

– 16 –

5-4. RAS-B18NKPX / RAS-18N2AX

FILE NO. SVM-06004

(Connecting pipe)

0.39 m

∅12.7

O.D.:12.7 mm

Compressor

Packed valve

(∅12.7)

PH340X3C-4KT1

Indoor unit

Evaporator

Cross flow fan

Condenser

Propeller fan

0.49 m (Connecting pipe) ∅6.35

O.D.:6.35 mm

Packed valve

(∅6.35)

Capillary tube

∅2.0x600 s

Dryer

Refrigerant R22 1.0 kg

Outdoor unit

Mark ( ) means check points of Gas Leak

Ambient temp.

Surface temp. of heat

exchanger interchanging

pipe

(°C)

Fan speed

(indoor)

conditions DB/WB

(°C)

Indoor Outdoor

50 Hz

Standard

pressure

(MPaG)

Standard 0.41 11.0 High 27/19 35/24

Cooling High temperature 0.56 15.0 High 32/23 43/26

Low temperature 0.32 2.0 Low 21/15 21/15

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

– 17 –

6-1. RAS18NKHP-E

Heat Exchanger Sensor

6. CONTROL BLOCK DIAGRAM

Indoor Unit Control Panel

M.C.U.

Functions

• Louver Control

FILE NO. SVM-06004

Operation

Display

Temperature Sensor

Infrared Rays Signal Receiver

Infrared

Rays

Remote

Control

From Outdoor Unit

220 ~ 240 V AC 50 Hz

Initiallizing Circuit

Clock Frequency

Oscillator Circuit

Power Supply

Circuit

Noise Filter

• 3-minute Delay at Restart for Compressor

• Motor Revolution Control

• Processing

(Temperature Processing)

• Timer

• Serial Signal Communication

Louver ON/OFF Signal

Louver Driver

Serial Signal Transmitter/Receiver

Serial Signal Communication

Timer

Display

Filter Sign

Display

PRE DEF.

Sign Display

Hi Power

Sign Display

Indoor

Fan Motor

Louver Motor

REMOTE CONTROL

Infrared Rays

Remote Control

Operation ( )Operation ( )

Operation Mode Selection

AUTO, COOL, DRY, HEAT, FAN ONLY

Temperature Setting

Fan Speed Selection

ON TIMER Setting

OFF TIMER Setting

Louver Auto Swing

Louver Direction Setting

ECO

Hi power

TIMER 1.3.5.9H

COMFORT SLEEP

QUIET

– 18 –

6-2. RAS-18NKP-E / RAS-18NA-E, RAS-B18NKPX / RAS-18N2AX

RAS-24NKP-E / RAS-24NA-E, RAS-24NKPX / RAS-24N2AX

Indoor Unit Control Panel

M.C.U.

Heat Exchanger Sensor

Functions

• Louver Control

FILE NO. SVM-06004

Operation

Display

Temperature Sensor

Infrared Rays Signal Receiver

Initiallizing Circuit

Infrared

Rays

Remote

Control

From Outdoor Unit 220 ~ 240 V AC 50 Hz

Clock Frequency

Oscillator Circuit

Power Supply

Circuit

Noise Filter

• 3-minute Delay at Restart for Compressor

• Motor Revolution Control

• Processing

(Temperature Processing)

• Timer

Outdoor unit

ON/OFF Signal

Relay Driver

Relay RY04

Outdoor Unit

Louver ON/OFF Signal

Louver Driver

Timer

Display

Filter Sign

Display

Fan Only

Sign Display

Hi Power

Sign Display

Indoor

Fan Motor

Louver Motor

REMOTE CONTROL

Infrared Rays

Remote Control

Operation ( )Operation ( )

Operation Mode Selection

AUTO, COOL, DRY, FAN ONLY

Temperature Setting

Fan Speed Selection

ON TIMER Setting

OFF TIMER Setting

Louver Auto Swing

Louver Direction Setting

ECO

Hi power

TIMER 1.3.5.9H

COMFORT SLEEP

QUIET

– 19 –

7. OPERATION DESCRIPTION

FILE NO. SVM-06004

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

OPERATION

MODE

RAS-18NKHP Series

RAS-24NKP Series

Model

RAS-18NKP Series

Operations according

to the commands from the indoor unit

Table 7-1-1

Cooling UH H M+ Heat Fan only Dry

rpm

Air flow volume (m3/h) rpm

Air flo w volume (m3/h)

rpm

Air flow volume (m3/h)

UH H

1300

900

−

• 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

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.

LOW

LOW+MED

MED+=

MED+HIGH

FAN TAP

1050

650

1150

750

1050

667

950

570

−

1050

−

667

−

950

−

M+ M M+

1100

700 1250 830

1100

708

−

1300

873

−

750 584

L+

LL+

L L

L+

900 530

1000

625 900

543

L- SUL/SL-

ULL+

L-

L- UL SUL

800

700

600

380 220

461

900

543 800 461

800

461 700 380

300

700 380 600 300

SUL/SL-

500

−

− 20 −

FILE NO. SVM-06004

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.

°C

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.

°C

ON ON

OFF OFF OFF ON

4-way valve

Compressor

Outdoor fan

(Room temp.) (Preset temp.)

Preset temp.

0.5

Fig. 7-2-2

display lamp

OPERATION

+3 +2.5 +2

+1.5 +1 +0.5

(Room temp.) − (Preset temp.)

Preset temp.

(Preset temp.: 24°C)

NOTE :

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

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

(2) The Hi POWER, ECO and COMFORT SLEEP

operation cannot be set.

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

M+

*1 *1 *1

(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.

°C

(Room temp.) − (Preset temp.)

Preset temp.

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

-0.5

M+

*1 *1 *1

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]

– 21 –

FILE NO. SVM-06004

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.

°C

ON:6min.

OFF:4min.

ON:5min.

OFF:5min.

OFF

4-way valve

Outdoor fan

(Room temp.) (Preset temp.)

Preset temp.

ON:6min.

OFF:4min.

OFF

ON:5min.

OFF:5min.

OFF

Compressor

Fig. 7-2-4

7-2-4. Heating operation *Heat pump model only

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

Preset temp.

display lamp

OPERATION

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

operation display lamp are controlled as shown in Fig. 7-2-6.

°C

OFF

0.5

(Room temp.) (Preset temp.)

OFF

4-way valve

Compressor

Outdoor fan

display lamp

OPERATION

Fig. 7-2-6

(2) The microprocessor turns the compressor on and

off at the regular intervals (4 to 6 minutes). While the compressor is turning off, the indoor fan motor operates in the SUPER LOW position. The pattern of operation depending on the relation between room temperature and preset temperatures is shown in Fig. 7-2-5.

R oom temp.

Preset temp.+1

Preset temp.

Compressor

Outdoor fan

Indoor fan

ON ON ON ON

OFF OFF OFF

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

*Super Low

Fig. 7-2-5

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

only.

(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.

Preset temp.

°C

-0.5

-1

-1.5

-2

-5.0

-5.5

[FAN AUTO]

(Room temp.) − (Preset temp.)

*1 *2

*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]

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

– 22 –

FILE NO. SVM-06004

(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.

Manual (One of

AUTO

SUL* SUL*1

Stop

5 speed)

L-H (Up to setting

speed)

A+4 A+4

464534

33 21 32 20

A-8 A-8

*6 *5

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.

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.

°C

Cooling operation

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

Cooling operation

Fan only operation

-1

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

• 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

–4°C

–3.5°C

Heating operation

RAS-18NKHP-E RAS-24NKP-E, RAS-24NKPX

(Room temp.) − (Preset temp.)

RAS-18NKP-E, RAS-18NKPX

Fig. 7-2-9

– 23 –

FILE NO. SVM-06004

55 54

Compressor

Outdoor fan

OFF

Heat exchanger temp. (°C)

7-3. Hi PO

([Hi PO contr

When [Hi PO unit is in A.)uto PO

WER mar

control and the unit oper (1)anA

WER Mode

WER] b

utton on the remote

ol is pressed.)

WER] b

, Cooling or Heating oper

k is indicated on the displa

utomatic operation

The indoor unit oper·ates in according to the

utton is pressed while the indoor

ation, Hi

y of the remote

ates as f

ollo

current operation.

(2) Cooling operation

• The setting temperature drops 3°C. (The value of the setting temperature on the remote control does not change.)

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

• FAN speed : [AUTO] If the room temperature is higher than the setting temperature by 3.5°C or more, the air conditioner operates at maximum airflow level. If the room temperature is higher than the setting temperature by less than 3.5°C, the air conditioner operates at normal airflow level.

• FAN speed : One of 5 levels If the room temperature is higher than the setting temperature by 3.5°C or more, the air conditioner operates at higher consecutive airflow level. If the room temperature is higher than the setting temperature by less than 3.5°C, the air conditioner operates at normal airflow level.

(3)

Heating operation

The preset temper

(The v

alue of the preset temper

ature increases 2

ature on the remote control does not change The indoor unit oper mode e (+2

(4)

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

xcept the preset temper

°C).

ates in nor

mal heating

ature is higher

only operation.

°C,

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.

Heat exchanger temperature

(°C)

Compressor Outdoor fan

Less than continues

for 5 minutes

OFF

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.

– 24 –

FILE NO. SVM-06004

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

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

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

Operation time (4 Loops = Tt)

Td1

Td2

Td3 Td4

Finish time recordStart time record

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

Fig. 7-6-2

FILE NO. SVM-06004

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.

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.

When the unit is on standby (Not operating)

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.

The unit beeps three times The lamp changes from

→ →

and continues to operate. green to orange.

TEMPORARY button

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.

After approx. three seconds,

When the unit is in operation

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,

TEMPORARY button

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

• While the filter check lamp is on, the

[TEMPORARY] button has the function of filter reset button.

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.

– 26 –

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)

Operation Motions

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

→

FILE NO. SVM-06004

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

→

After approx. three seconds,

TEMPORARY button

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.

When the unit is in operation

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,

TEMPORARY button

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

• While this function is being set, if the unit is in

7-8. Filter Check Lamp

operation, the orange lamp is on.

When the elapsed time reaches 1000 hours, the filter

7-7-3. Power failure during timer operation

check lamp indicates. After cleaning the filters, turn off the filter check lamp.

When the unit is in Timer operation, if it is turned off because of power failure, the timer operation is

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

cancelled. Therefore, set the timer operation again.

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.

– 27 –

FILE NO. SVM-06004

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 system reduces moisture in the coil. When air conditioner is turned off, the internal fan activates and dries the moisture in the coil for 20 minutes, then it turns off automatically.

Operation display ON OFF OFF

FCU fan

FCU louver OPEN CLOSE CLOSE

Timer display

Compressor

CDU fan ON or OFF

rpm is depend on presetting. rpm is SL speed.

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

depend on presetting per room temperature.

Cool mode or dry mode

operation more than 10 mins.

ON ON

ON or OFF

Self-Cleaning mode

Turn off by remote controller or

timer-off function.

OFF OFF

operate 20 mins.

Automatically turn-off.

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

• Self-Cleaning operation can stop manually by press [

9-1. How to cancel Self-Cleaning function

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

• Press [

TEMPORARY] button one time or use remote control to turn on air conditioner. The OPERATION display will show in orange color (When AUTORESTART is ON) or green color (When AUTORESTART is OFF).

• Hold down the [

TEMPORARY] button for more than 20 seconds. (The air conditioner will stop suddenly when the [

TEMPORARY] button is pressed but keep holding it continue. Then will beep 3 times in the first 3 seconds but it is not related to Self-Cleaning function)

• After holding about 20 seconds, the air conditioner will beep 5 times without any blinking of display.

• The Self-Cleaning Operation had been cancelled.

] button of the remote control two more time.

9-2. How to set Self-Cleaning function.

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

• Press [

TEMPORARY] button one time or use remote control to turn on air conditioner. The OPERATION display will show in orange color (When AUTORESET is ON) or green color (When AUTORESTART is OFF).

• Hold down the [

TEMPORARY] button for more than 20 seconds. (The air conditioner will stop suddenly when the [ holding it

TEMPORARY] button is pressed but keep

continue. Then will beep 3 times is the first 3 seconds but it is not related to Self-Cleaning function)

• After holding about 20 seconds, the air conditioner will beep 5 times and OPERATION display blinks 5 times.

• The Self-Cleaning function had been set.

OFF

ON or OFF

Operation time

Remarks

• Per setting of Self-Cleaning function above, AUTORESTART function had been cancelled. To set AUTO-RESTART again, please follow item 7-

8-1.

TEMPORARY button

Remarks

• Per setting of Self-Cleaning function above, AUTORESTART function had been cancelled. To set AUTO-RESTART again, please follow item 7-

– 28 –

8-1.

FILE NO. SVM-06004

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.

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

speed L

again (cancel Quiet mode). Remarks :

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

2. Quiet mode is appropriate to work with less

until the [QUIET] button is pressed once

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. COMFORT SLEEP mode

The principles of comfort sleep mode are:

• Quietness for more comfortable.

• Save energy by changing room temperature

automatically.

• The air condition can shut down by itself

automatically.

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 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

Remarks:

1. Comfort sleep mode will not operate in dry mode

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.

• 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.)

• Press the [COMFORT SLEEP] button to choose the

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

• If the [COMFORT SLEEP] button is pressed again

means cancel comfort sleep mode.

FILE NO. SVM-06004

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.

DANGER

• FOR USE BY QUALIFIED PERSONS ONLY.

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

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

• CONNECT THE CONNECTING CABLE CORRECTLY. IF THE CONNECTING CABLE IS CONNECTED WRONGLY, ELECTRIC PARTS MAY BE DAMAGED.

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

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

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

• TO PREVENT OVERHEATING THE INDOOR UNIT AND CAUSING A FIRE HAZARD, PLACE THE UNIT WELL AWAY (MORE THAN 2 M) FROM HEAT SOURCES SUCH AS RADIATORS, HEATORS, FURNACE, STOVES, ETC.

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

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

WARNING

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

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

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

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

CAUTION

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

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

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

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

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

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

tions for proper installation.

– 30 –

FILE NO. SVM-06004

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.

– 31 –

8-2. Installation Diagram of Indoor and Outdoor Units

FILE NO. SVM-06004

tta

Bio enzyme & Gingko filter

Sasa zeolite vitamin c filter

Filter frame

Before installing the

wireless remote control

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

Wireless remote control

Cover

170 mm or more

Hook

100 mm or more

Hook

1 Installation

plate

170 mm or mo

For the rear left and left piping

Wal l

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

Do not allow the drain hose to

get slack.

Cut the piping hole sloped slightly .

Shield

t p

l.) (A

tta

filte

pipe

Make sure to run the drain hose sloped downward.

The auxiliary piping can be connected to the left, rear left,

Pan head wood screw

Remote control holder

rear, right or bottom.

Right

Rear

Rear left

Bottom

Insulate the refrigerant pipes

Left

separately with insulation, not together.

Wireles sremote control

6 mm thick heat resisting polyethylene foam

Batteries

Extension drain hose

(Not available,

provided by installer)

mor

100

600 mm or more

ore

600

18 Class 24 Class

32 −

−

Vinyl tape Apply after carrying out a drainage test.

Saddle

Extension

or m

600 mm or more

ore

or m

drain hose

(Not available, provided by installer)

8-3.Installation

8-3-1. Optional installation parts

FILE NO. SVM-06004

Part

Code

Refrigerant piping Liquid side : ∅6.35 mm

Gas side : ∅12.70 mm (18 series

: ∅15.88 mm (24 series

Pipe insulating material

(polyethylene foam, 6 mm thick) Putty, PVC tapes

124 mm109 mm

321 mm

28 mm

86 mm

Air outlet

600 mm

Air inlet

Parts name

) )

116 mm

90 mm

Drain outlet

Q'ty

One

each

One

each

Fig. 8-3-1.

• Secure the outdoor unit with fixing bolts and nuts if the unit is likely to be exposed to a strong wind.

 • Use 

∅ 8 mm or



∅ 10 mm anchor bolts and nuts.

 • If it is necessary to drain the defrost water, attach drain nipple 10 to the bottom plate of the outdoor unit

before installing it.

– 33 –

8-3-2. Accessory and installation parts

FILE NO. SVM-06004

Part

No.

Part name (Q'ty)

Installation plate x 1

Wireless remote control x 1

Battery x 2

Others

Owner’s manual

Installation manual

Name

Part

No.

Part name (Q'ty)

Remote control holder x 1

Filter frame x 2

Sasa zeolite vitamin c filter x 2

Part

No.

Part name (Q'ty)

Bio enzyme & Gingko filter x 2

Mounting screw ∅4 x 25 s x 8

Pan head wood screw ∅3.1 x 16 s x 2

Drain nipple* x 1

The part marked with asterisk (*) is packaged with the outdoor unit.

(For Heat pump model only)

– 34 –

FILE NO. SVM-06004

8-4.Indoor Unit

8-4-1. Installation place

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

• 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.

Remote control

(Top view)

Indoor unit

Reception range

* : Axial distance

5 m

Remote control

Indoor unit

(Side view)

7 m

Reception range

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

plate

When installing the refrigerant pipes from the rear.

Pipe hole

The center of the pipe hole is above the arrow.

100 mm

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.

For installation of the indoor unit, use the paper pattern on the back.

Hook

* 7 m

170

120

Fig. 8-4-1

– 35 –

Pipe hole

Indoor unit

Hook

Thread

Weight

Fig. 8-4-3

Hook

Pipe hole

Installation plate

8 Mounting screw

FILE NO. SVM-06004

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.

Installation plate <Keep horizontal direction>

Anchor bolt

Projection

5 mm dia. hole

15 mm or less

8-4-3. Electrical work

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

2. Prepare 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.

8 Mounting

screw

∅4 x 25

Clip anchor (local parts)

Fig. 8-4-4

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

NOTE

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

– 36 –

8-4-4. Wiring connection

Air Inlet grille

Front panel

FILE NO. SVM-06004

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.

Cord clamp

Screw

Terminal block

Connecting cable

Earth line

Terminal cover

Screw

Fig. 8-4-5

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

without remo ving of the fr ont panel.

Connecting cable

t 1

Fig. 8-4-6

Earth line

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)

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 kgfám).

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.

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.

– 37 −

Fig. 8-4-9

FILE NO. SVM-06004

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.

Slit (Body-right)

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.

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

(To the forefront of flare)

400 mm

300 mm

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

43 mm

Liquid side

Gas side

Outward form of indoor unit

Use the handle of screwdriver, etc.

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.

Slit (Body-right)

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.

CAUTION

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

Indoor unit

Auxiliary pipes

Installation plate

• 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.

Connecting cable

Drain hose

– 38 –

FILE NO. SVM-06004

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.

Hook

Hook here

1 Installation

plate

Fig. 8-4-13

• For detaching the indoor unit from the installation plate, pull the indoor unit toward you while pushing its bottom up at the specified parts.

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.

Do not form the Do not rise the drain hose.

50 mm or more

Do not put the drain hose end into water.

drain hose into

a wavy shape.

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

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.

PushPush

Push

(unhook)

Fig. 8-4-14

Shield pipe

Drain hose

Inside the room

Extension drain hose

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.

Wall

Drain guide

Space for pipes

– 39 –

Fig. 8-4-17

FILE NO. SVM-06004

8-5.Outdoor Unit

8-5-1. Installation place

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

• A place which can bear the weight of the outdoor unit and does not allow an increase in noise level and vibration.

• A place where the operation noise and discharged air do not disturb your neighbors.

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

• A place free of a leakage of combustible gases.

• A place which does not block a passage.

• When the outdoor unit is to be installed in an

elevated position, be sure to secure its feet.

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

• An allowable height level is up to 8 m. (RAS-18 class) or 10 m. (RAS-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.

8-5-2. Refrigerant piping connection

1. Cut the pipe with a pipe cutter.

90°

Obliquity

Roughness

Fig. 8-5-2

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

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

Die

Pipe

Fig. 8-5-3

Outer dia.

of copper pipe

Rigid Imperial

6.35 1.0 to 1.5 1.5 to 2.0

12.70 1.0 to 1.5 2.0 to 2.5

15.88 1.0 to 1.5 2.0 to 2.5

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

CAUTION

• Do not apply excess torque.

• Otherwise, the nut may crack depending on the

conditions.

Warp

Strong

wind

Fig. 8-5-1

– 40 –

FILE NO. SVM-06004

(Unit : N·m)

Outer dia.

of copper pipe

Tightening torque

∅6.35 mm 16 to 18 (1.6 to 1.8 kgf·m) ∅12.70 mm 50 to 62 (5.0 to 6.2 kgf·m) ∅15.88 mm 65 to 80 (6.5 to 8.0 kgf·m)

• Tightening torque of flare pipe connections

Flare at indoor unit side

Flare at outdoor unit side

Fig. 8-5-4

Flare nutHalf union

Externally threaded side

Use a wrench to secure.

Use a torque wrench to tighten.

Internally threaded side

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)

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.

Compound pressure gauge

-101 kPa (-76 cmHg)

Handle Lo

Pressure gauge

Manifold valve

Handle Hi (Keep full closed)

– 41 –

Charge hose

Connecting pipe

Packed valve at liquid side

Packed valve at gas side

Service port (Valve core (Setting pin))

Fig. 8-5-6

Charge hose

Vacuum pump adapter for counter-flow prevention

Vacuum

pump

FILE NO. SVM-06004

123

TO CHARGE REFRIGERANT

Refrigerant

No need to charge extra refrigerant

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

24 class 18 class

15 m or less 15 m or less

• Open the valve stem all the way out; but do not try to open it beyond the stopper.

• Securely tighten the valve stem cap with torque in the following table:

Gas side Tightening torque A

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

Gas side 60 to 62 N·m 4 mm (∅12.70 mm) (6.0 to 6.2 kgf·m)

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

Service port

9 to 10 N·m (0.9 to 1.0 kgf·m)

• Hexagonel wrench : A (Unit : mm)

Hexagonal wrench is required.

Terminal block

LN 1 32

Terminal screw

Cord clamp

Power supply cord

Earth line

Power supply cord

Earth line

Screw

Cord clamp

Connecting cable

Fig. 8-5-8

Model

Power source

Maximum running current

Plug socket & fuse rating

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

24 class 18 class

50 Hz, 220 - 240 V Single phase

50 Hz, 220 V Single phase

(For RAS-24NKPX / RAS-24N2AX and

RAS-B18NKPX / RAS-18N2AX model)

18A 16A

20A 20A

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.

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)

– 42 –

FILE NO. SVM-06004

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 received when the indoor unit setting is different from the remote control one.

1. Set the remote control selectors witch 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 Chapter 10-1, procedure 1 )

3) Open the Electrical part cover (Refer to chapter 10-1, procedure 2 ), then cut the jumper (J90) with only the nippers.

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

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

1) Load the remote control with the batteries.

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

3) Press the [MODE] button while pressing the [CHK] 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 [CHK] button.

CAUTION

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

may cause breakage or damage.

See Fig. 8-6-1

Fig. 8-6-1

[MODE] button

[CHK] button

Fig. 8-6-2

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

− 43 −

FILE NO. SVM-06004

8-7.Others

8-7-1. Gas leak test

Electric parts cover

Flare nut connections (Outdoor unit)

Valve stem cap connection

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

Flare nut connections (Indoor unit)

Valve stem cap connection

Service cap connection

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.

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

TEMPORARY button

Fig. 8-7-2

– 44 –

9. TROUBLESHOOTING CHART

FILE NO. SVM-06004

9-1. Troubleshooting Pr ocedure :

9-2-2. Incorrect cable connection between Indoor

and outdoor units

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

9-4. Self-Diagnosis by Remote Control.

9-2. Basic Check Items

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

9-2-1. Power supply voltage

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

9-2-3. Program control

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

Table 9-2-1

No. Operation of air conditioner Descriptions

1 When the main power supply is turned

on, the OPERATION lamp on the indoor unit blinks.

2 The indoor fan motor speed does not

change in the Dry operation.

3 The compressor is not turned off even

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

4 The compressor is not turned on and

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

*5 The PRE-DEF. lamp is indicated when

the Heating operation starts.

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

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

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

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

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

*6 The outdoor fan motor stops in the

Heating operation.

7 The compressor is not turned on even

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

8 The operation mode changes in the

Automatic operation.

9 The Fan only operation continues in the

Automatic operation.

10 The ECO operation or Hi-POWER

operation does not work.

11 When [Hi POWER] button is pressed,

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

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

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

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

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

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

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

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

– 45 –

FILE NO. SVM-06004

9-3. Primary Judgement

9-3-1. Role of indoor unit controller

The indoor unit controller receives the operation commands from the remote control and executes them.

• Temperature measurement at the air outlet of the indoor heat exchanger by the indoor temperature sensor

• Temperature setting of the indoor heat exchanger by the heat exchanger sensor

• Louver motor control

• Indoor fan motor operation control

• LED display control

• Transferring of operation commands to the outdoor

unit

Table 9-3-1

Lamps Self-diagnosis

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

(5 Hz)

9-3-2. Failure diagnosis

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

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

G OPERATION, TIMER and PRE-DEF.

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

Table 9-3-2 Diagnosis by detective operation

Symptom Check Primary judgement

The remote control does not work.

The outdoor fan does not rotate.

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

The compressor operates.

The compressor does not operate.

Cycle failure

• Gas shortage or other refrigerant cycle trouble

• Heat exchanger sensor open, break or short

• Overload relay or thermostat trouble of compressor

The remote control still does not work.

The remote control works.

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

OK.

The outdoor unit (Outdoor fan motor) is defective .

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

– 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 5 Hz and it

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

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

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

FILE NO. SVM-06004

(1) Press [CHK] 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 [TIMER 8] 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 35 check codes (00 to 22). as shown in Table 9-4-1.

• Press [TIMER 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.)

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

service code in memory.

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

1E02 22

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

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

* This illustration is only for Heat pump model.

For Cooling only model, there is not the ( ) symbol.

– 47 –

(4) Press [ ] button to release the service

mode.

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

Table 9-4-1

Block level Diagnosis function

Check

code code status

Block

Indoor P.C. board

Cable connection

Outdoor P.C. board

Other parts (including compressor)

Check

Symptom

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

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

The indoor fan motor or its circuit is defective.

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

IOL operation

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

The crossover wire is

•

connected wrongly. The serial signal transmitting

•

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

•

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

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

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

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

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

1. Compressor thermo operation

•

Gas shortage

• Gas leak

2. Instantaneous power failure

The discharge temperature is over 120°C.

The IOL operation is defective.

Unit

Operation continues.

All off

Operation continues.

All off

Operation continues.

All off

Operation continues.

All off

Condition

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

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

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

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

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

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

FILE NO. SVM-06004

Judgement and action

1. Check the indoor thermo sensor (TA).

2. Check the indoor P.C. board.

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

2. Check the indoor P.C. board.

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

2. Check the indoor fan motor.

3. Check the indoor P.C. board.

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

Overload operation of refrigerating cycle

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

•

Check the crossover cable and connect it properly.

•

Check the outdoor P.C. board.

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

•

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

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

1. Check the outdoor thermo sensor (TE).

2. Check the outdoor P.C. board.

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

2. Check the outdoor P.C. board.

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

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

1. Check the heat exchanger sensor (TD).

2. Gas purging

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

− 48 −

9-5. How To Diagnose Faulty Parts

[04 Serial signal error] (Heat pump model)

FILE NO. SVM-06004

Operation

Check item

Conceivable principle cause

Measure

Does outdoor

unit operate?

YES

Are 1, 2 and 3 crossover

wires connected properly?

YES

Is connector

connected properly?

YES

Does LED (Orange) on

outdoor P.C. board blink?

YES

Does LED (Green) on

outdoor P.C. board blink?

YES

Outdoor P.C. board

is defective.

Indoor P.C. board

is defective.

Item by symptoms

Connect crossover

wires properly.

Connect connector

properly.

Replace

P.C. board.

Replace

P.C. board.

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

Does four-way valve

operate properly?

YES

Is TC sensor

resistance value

(10 kΩ at 25°C) normal?

YES

Does coil terminal

have 220 − 240 V

in heating operation?

YES

Are circuit

wires normal?

YES

Is outdoor P.C. board

normal?

YES

Four-way valve

is defective.

Outdoor P.C. board

is defective.

(CN11 220 − 240 V)

Indoor P.C. board

is defective.

Replace

Four-way valve

Circuit check/modification

Replace

P.C. board.

Replace

P.C. board.

Replace TC sensor.

– 49 –

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

FILE NO. SVM-06004

Replace TC

sensor.

YES

Connect TC

sensor properly.

Does compressor operate?

YES

Is compressor

turned off shortly?

Is TC sensor

resistance value

(10 kΩ at 25°C) normal?

YES

Is TC sensor

disconnected from

the sensing element?

YES

Does inner

overload relay

(in compressor)

operate?

Is circuit wiring

normal?

YES

Is outdoor P.C.

board normal?

YES

Check charged amount of refrigerant.

Check defective overload.

Check compressor.

Failure

compressor.

Wiring check/modification

Outdoor P.C. board

is defective.

Indoor P.C. board

is defective.

Replace

P.C. board.

Replace

P.C. board.

[09 Other cycle error] (2)

Connect

connector

properly.

Replace

condenser.

Replace

fan motor.

Is connector

connected properly?

Is condenser normal?

Is indoor fan

motor normal?

YES

Does indoor fan operate?

Are filters clogged?

Is TC sensor

resistance value

(10 kΩ at 25°C) normal?

Is charged amount

of refrigerant normal?

Is outside air

low load?

YES

Clean filters.

Replace

TC sensor.

Anti-freezing operation

Charge

refrigerant.

Anti-freezing operation

Indoor P.C. board

is defective.

– 50 –

Replacd

P.C. board.

[0C Indoor TA sensor error]

FILE NO. SVM-06004

Is CN03 (TA sensor connector)

connected properly?

YES

Is TA sensor resistance value

(10 kΩ at 25°C) normal?

YES

[0d Indoor TC sensor error]

Is CN01 (TC sensor connector)

connected properly?

YES

Indoor P.C. board is defective.

Connect CN03 properly.

Replace T A sensor.

Replace P.C. board.

Connect CN01 properly.

Is TC sensor resistance value

(10 kΩ at 25°C) normal?

YES

Indoor P.C. board is defective.

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

Is TE sensor connector

connected properly?

YES

Is TE sensor resistance value

(10 kΩ at 25°C) normal?

YES

Replace TC sensor.

Replace P.C. board.

Connect connector

properly.

Replace TE sensor.

Indoor P.C. board is defective.

– 51 –

Replace P.C. board.

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

FILE NO. SVM-06004

Is TD sensor

connected properly?

YES

Is TD sensor resistance value

(50 kΩ at 25°C) normal?

YES

Outdoor P.C. board is defective.

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

Connect connector

properly.

Replace TD sensor.

Replace P.C. board.

Is protective

controller such as discharge

thermostat normal?

YES

Is charged amount

of refrigerant normal?

YES

Is overload relay normal?

Is TD sensor resistance value

(50 kΩ at 25°C) normal?

YES

NO NO

YES

Are wires connected

to connector properly?

Outdoor P.C. board is defective.

Connect wires to

connector properly.

Check and modify charged

amount of refrigerant.

Unit operates normally.

Replace TD sensor.

Replace P.C. board.

– 52 –

9-6. Troubleshooting for Indoor unit

Operation

Measure

Item by symptoms

Check item

Conceivable principle

cause

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

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

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

on again.

Is OPERATION

lamp blinking?

YES

Does

Is it possible to

turn on power

supply by

pressing

[START/STOP]

button on remote

control?

YES

transmission

mark on

remote

control flash

normally, and

is its signal transmitted

properly?

YES

FILE NO. SVM-06004

Remote control is

defective.

Refer to 9-9

" Troubleshooting for

Remote Control."

Is DC 310 -

340V across

C63?

Are DC 12V,

across C66?

YES

Is fuse (F01)

control board

Is voltage (DC

12V or 5V)

indicated on rear of indoor control board

Turn off breaker

once and turn it

on again after

removing motor.

of indoor

blown?

normal?

YES

Parts (R21,

R22, SG01,

C01, DB01,

C02,

M01 and IC04)

are defective.

Are DC 12V, across C66?

YES

– 53 −

Does the fan

motor

connector

between 1

and 2 short-

circuit?

Microcomputer is

defective.

M01 is

def

tive.

Unit operates

normally.

YES

Replace main P.C.

board.

Replace motor.

FILE NO. SVM-06004

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

(1) Is it possible to detect the power supply voltage (200 − 240V) 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.)

Shut off the

power supply once.

Turn the power supply.

Does the fan stop in no operating status?

YES

Start the operation

with low fan setting

in cool operation.

Does the fan rotate?

YES

Change the setting of

cooling to high fan.

Does the fan speed

become higher?

YES

Control P.C. board is defective.

Does AC 120V

or higher voltage apply

to between red and black

lead of fan motor?

YES

Shut off the power supply.

Does the cross flow fan rotate normally?

YES

Turn on the power supply.

Operation

stops

Replace the P.C. board.

Does connecting

terminal, connecting

cable or power supply

cord completely?

Does not found the short

wire about connecting

cable and power cord?

YES

Repair the bearing of

the fan.

Motor control circuit failure

(IC30, IC03, D38, R25, R26, Q17)

or 12V power circuit failure.

Replace the P.C. board.

of incompleted connecting.

Thermal fuse operated

due to prevent

temperature rising cause

Normal

Is the rotation signal (DC+5V-0V)

output between 2 (gray lead wire)

and 3 (brown lead wire) of the motor

connector (CN11) when rotating

the cross flow fan by hand in no

operating status?

(1 pulse/one turn)

YES

Replace the control

P.C. board.

− 54 −

Replace the fan motor

Replace connecting

the cable (or power cord),

thermal fuse and

terminal block.

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.

FILE NO. SVM-06004

Does OPERATION

lamp blink?

YES

Does miniature relay RY04

switch on and off due to

temperature changes?

YES

Is it possible to detect AC

220 – 240V between 2

and 3 on terminal block?

YES

Are all of compressor cords normal?

YES

Is compressor motor winding

normal?

(Check winding resistor.)

YES

Is capacitor for compressor normal?

Is resistance value of thermo

sensor (TA) and heat ex-

changer sensor (TC) normal?

Microcomputer is defective.

Miniature relay RY04 is

defective.

Compressor is defective.

YES

Capacitor is defective.

Refer to 9-6-1 “Power

can not be turned on”.

Thermo sensor or

heat exchanger

sensor is defective.

Replace thermo sensor

or heat exchanger

sensor.

Replace P.C. board.

Rewire or replace

defective cords.

Replace compressor.

Replace capacitor.

YES

Is overload relay normal?

YES

Does compressor start?

YES

Does compressor stop after a while?

YES

Is gas quantity normal?

(Check gas pressure.)

YES

Compressor is defective.

YES

Replace P.C. board.

Overload relay is

defective.

Compressor is defective.

Gas shortage (Gas leak)

– 55 –

Replace overload relay.

Replace compressor.

Supply gas.

- Cooling model -

Turn on power supply.

FILE NO. SVM-06004

Does OPERATION

lamp blink?

YES

Is it possible to start

unit by remote control?

YES

Is it possible to detect AC 200V

between 2 and 3 on terminal block?

YES

Is crossover cable normal?

YES

Are all of compressor cords normal?

YES

Is compressor motor winding normal?

(Check winding resistor.)

YES

Is capacitor for compressor normal?

YES

Compressor is defective.

Capacitor is defective.

Refer to item Power

can not be turned on .

Refer to 9-9 Troubleshooting

for Remote Control .

Replace P.C. Board

Connect crossover

cable properly.

Rewire or replace

defective cords.

Replace compressor.

Is overload relay normal?

YES

Does compressor start?

YES

Does compressor stop after a while?

YES

Is gas quantity normal?

(Check gas pressure.)

YES

Compressor is defective.

YES

Replace P.C. borad

Overload relay is defective.

Compressor is defective.

Gas shortage (Gas leak)

Replace overload relay.

Replace compressor.

Supply gas.

− 56 −

<Inspection procedure)

- Heating model -

AC 70-100V

FILE NO. SVM-06004

Replace transformer

outdoor

P.C. board.

− 57 −

YES

FILE NO. SVM-06004

Are all of compressor cords normal?

YES

Is compressor motor winding normal?

(Check winding resistor.)

YES

Is capacitor for compressor normal?

YES

Is overload relay normal?

YES

Does compressor start?

YES

Does compressor stop after a while?

YES

Is gas quantity normal?

(Check gas pressure.)

YES

Compressor is defective.

Capacitor is defective.

Overload relay is defective.

Compressor is defective.

Gas shortage (Gas leak)

Rewire or replace

defective cords.

Replace compressor.

Replace capacitor.

Replace overload relay.

Replace compressor.

Supply gas.

Compressor is defective.

YES

Replace compressor.

– 58 –

FILE NO. SVM-06004

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. 

Heatpump model

Terminal block on indoor side

Red

White

Terminal block

Tester

Normal condition : Voltage varied between AC70 ~ 100V Abnormal condition : Voltage does not vary.

Cooling model

Terminal block on indoor side

Red

White

Terminal block

Tester

Fig. 9-7-1

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

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

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

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

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

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

restart the unit.

Gas has a low circulation.

Measure gas pressure.

Compressor is turned off and on automatically by thermo sensor

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

Gas shortage

Gas leak

Pipe clogging

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

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

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

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

− 59 −

FILE NO. SVM-06004

9-8. Troubleshooting for P.C. board

9-8-1. How to check indoor P.C. board <Cautions for handling 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.

(1) If the P.C. board is detective, 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 9-8-1 Inspection pr ocedure

No. Procedure Check points Causes

1 Turn off the power supply and

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

2 Remove the connector of the motor

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

Check whenther 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 C63 (DC310 − 340 V)

3. Between 12 V and GND

4. Between 5 V and GND

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 (R319), or the diode (DB01) is defective.

3. C65, C66 and M01 are defective.

4. IC04, C05, C06 and C07 are

defective.

3 Press [ ] button once

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

4 Shorten the line of the restart delay

timer and start unit.

Check power supply voltage; <Heat pump model>

1. Between CN31 and CN23 (DC15 − 60 V)

1. Between connector of Q24 and GND (for relay coil (DC12 V))

2. Between 1 and 2 of terminal block for connecting cable

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

<Heat pump model> IC32 and IC33 are defectice.

1. The wire of the relay coil (RY04) comes down or the relay drive (Q24) is defective.

2. CN27 or RY04 is connected wrongly.

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

– 60 −

FILE NO. SVM-06004

No. Procedure Check points Causes

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 much

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

1. Check whether or not the compressor operates.

2. Check whether or not the OPERATION lamp blinks.

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.

6 If the above condition (No. 6) still

continues, start the unit in the following condition.

• Set the operation mode to HEAT.

• Set the preset temperature much

higher than room temperature.

7 Connect the motor connector to the

motor and turn on the power supply. Start the unit in the following condition.

• Set the operation mode to FAN.

• Set the fan speed level to HIGH.

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

1. Check whether or not the compressor operates.

2. Check whether or not the OPERATION lamp blinks.

1. Check it is impossible to detect the voltage (DC 12 V) between and1

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.

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

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

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

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

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

2. The connection of the motor connector is loose.

3. The P.C. board is defective.

Table 9-8-2 Approximate resistance value of thermo sensor

Temperature 0°C10°C20°C25°C30°C

Resistance value 33.8 20.35 12.59 10.0 7.99

(kΩ)

9-8-2. How to Shorten Time of Restart Delay Timer

1 Press [CLR] button while pressing [CHK] button

with a tip of a pencil.

2 Then press [ ] button to transmit the

signal to the indoor unit.

9-8-3. How to use self cleaning function

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

same procedure when need to set.

– 61 –

9-9. Troubleshooting for Remote Control

FILE NO. SVM-06004

Is receiver on

indoor unit exposed

to direct sunlight?

YES

Is there any

thyristor fluorescent

light nearby?

YES

NO NO

Press [ ]

button.

Is transmission

mark indicated?

Does indoor unit

operate when

moving remote control

near receiver or

indoor unit?

YES

Batteries are

exhausted.

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

Press RESET button

on remote control

with tip of pencil.

Press [ ]

button.

Avoid direct

sunlight.

Keep indoor unit

away from

thyristor

fluorescent light.

Does indoor unit

start to operate by

automatic restart

function?

YES

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.

Replace

P.C. board.

YES

Replace

batteries.

Note : After replacing batteries,

press the RESET button with a tip of a pencil.

– 62 –

Is transmission mark

indicated?

YES

Does indoor unit

beep and operate?

YES

Normal

operation

Remote control

is defective.

Replace

remote control.

FILE NO. SVM-06004

(6) TC sensor

(4)

(3)

4-screws

(2)

10. PART REPLACEMENT

10-1. Indoor Unit

No. Part name Procedures Remarks

1 Front panel

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 body by pulling it toward you.

Open the horizontal grille right below by hand.

Pull the lower side of the front panel toward you until it touches the horizontal grille to remove it.

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.

2 Electrical part

assembly

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.

(3) Drain guide

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

(5) screws

(2) screws

5P 6P

– 63–

FILE NO. SVM-06004

Bearing base

Bearing

Motor fixture

(4) BODY (R)

(3) 2 screws

(4)

No. Part name Procedures Remarks

3 Horizontal grille

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

2) Remove left shaft of the horizontal

louver from the

back body.

3) Remove the horizontal grille from the back body.

(1) Center shafts

(2) Left shafts

4 Heat exchanger

5 Cross flow fan

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. (Hexagonal wrench is required.)

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

4) Pull the cross flow fan toward you.

Pipe holder

(3) 2 screws

(2) Screw

Bearing base

(4) 2 screws

(3) Screws

(2) Set screw

6 Bearing base

7 Fan motor

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 6 mm.

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.

– 64 –

FILE NO. SVM-06004

10-2. Outdoor Unit (RAS-24NA-E, RAS-24N2AX)

No. Part name Procedures Remarks

Top cabinet

1 Common

procedure

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

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

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.

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)

Front cabinet

3 screws

∅4 x 10L

Packed valve cover

2 Cord clamps

Side cabinet

4 screws ∅4 x 16L

7 screws ∅4 x 10L

Front

cabinet

– 65 –

FILE NO. SVM-06004

No.

2 Running

3 Running

4 Magnetic

5 Spark killer

Part name

capacitor for compressor

capacitor for fan motor

contactor

(Cooling only model)

Procedures

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.

Remarks

Running capacitor for compressor

Running capacitor for fan motor

Cooling only model

Spark killer

Magnetic contactor

– 66 –

FILE NO. SVM-06004

10-3 Outdoor Unit (RAS-18NAH-E, RAS-18NA-E, RAS-18N2AX)

No. Part name Procedures Remarks

1 Common

procedure

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

2) Remove the packed valved cover and the electrical

Parts cover

(2 screws ∅ 4 x 10L)

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

4) Remove the upper cabinet. (4 scerws ∅ 4 x 10L) (Pulling out upward)

5) Remove the front cabinet. (3 screws∅ 4 x 10L) (Pull the front right protion toward you, and remove

it pulling out upward.)

Packed valve cover

3 screws ∅4 x 10L

Upper cabinet

2 Cord clamps

4 screws ∅4 x 16L

Running

capacitor

for compressor

Running

capacitor

for fan motor

Magnetic contactor

Transformer

(Heat pump model)

P.C. Board

(Heat pump model)

Spark killer

(Cooling only model)

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.

form the common procedure 1

1) Per

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

3) Disconnect the lead wires from the terminal.

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.

1) Perform the common procedure 1

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

3) Disconnect the lead wires from the terminal.

Running capacitor for fan motor

Running capacitor

for compressor

Running capacitor

for compressor

Front

cabinet

Heat pump model

for fan motor

Cooling only model

P.C. Board

Transformer

Magnetic contactor

Spark killer

Magnetic contactor

− 67 −

11. EXPLODED VIEWS AND PARTS LIST

)

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

FILE NO. SVM-06004

Location Part Location Part

No. No. No. No.

402 43T60002 TERMINAL BLOCK; 3P 411 43T69451 PC BOARD (RAS-24NKP-E, 403 43T50004 SENSOR; HEAT EXCHANGER 404 43T50314 SENSOR;THERMOSTAT 411 43T69508 PC BOARD (RAS-18NKP-E, 405 43T69487 PC BOARD ASSY ; WRS-LED 407 43T62003 CORD CLAMP 411 43T69507 PC BOARD (RAS-18NKHP-E)

Description Description

RAS-24NKPX

RAS-B18NKPX

413 43T63310 SENSOR HOLDER

– 68 –

11-2. Indoor Unit

213

221

222

203

217

238

219

220

201

229

227

214

228

215

216

218

208

230

FILE NO. SVM-06004

232

209

211

231

226

224

212

207

237

204

202

Location Part Location Part

No. No. No. No.

236

Description Description

223

201 43T00409 FRONT PANEL ASSY 202 43T09388 GRILLE ASSY 203 43T80306 AIR FILTER (L) 204 43T80312 AIR FILTER (R) 207 43T03010 BODY; RIGHT 208 43T03011 BODY; LEFT 209 43T03012 HIDE; CLAW 210 43T09345 LOUVER-H 211 43T70309 HOSE ASSY; DRAIN 212 43T21373 MOTOR; STEPPING 213 43T44310 REFRIGERATION CYCLE

ASSEMBLY(RAS-24NKP-E,RAS-24NKPX)

213 43T44311 REFRIGERATION CYCLE

ASSEMBLY(RAS-18NKP-E,RAS-B18NKPX) 214 43T47311 PIPE; DELIVERY 215 43T47316 PIPE; SUCTION

(RAS-24NKP-E,RAS-24NKPX) 215 43T47016 PIPE; SUCTION

(RAS-18NKP-E,RAS-B18NKPX)

216 43T49010 PIPE; SHIELD 217 43T19003 FIX-P-SENSOR

210

233

234

218 43T49009 SPRING 219 43T49036 PLATE; EVA-SEAL

220 43T49039 HOLDER; PLATE EVA-SEAL 221 43T49038 PLATE; EVA-SEAL 222 43T49037 HOLDER; PLATE EVA-SEAL

223 43T79007 GUIDE DRAIN 224 43T39306 FIX FOR MOTOR 226 43T21370 MOTOR FAN (For Part 43T21359) 227 43T20309 FAN; CROSS FLOW 228 43T22309 ASM-M-BEARING 229 43T39015 BASE; BEARING 230 43T03344 BACK BODY ASSY

230 43T03337 BACK BODY ASSY

231 43T07022 HOLDER; PIPE 232 43T82007 PLATE; INSTALLATION 234 43T69422 WIRELESS-REMOCO 235 43T83003 HOLDER; REMOTE CONTROLLER 236 43T62029 COVER; TERMINAL

235

Electric Parts Assembly

(RAS-24NKP-E,RAS-18NKP-E)

(RAS-24NKPX,RAS-B18NKPX

)

– 69–

11-3. Outdoor Unit (RAS-18NAH-E)

FILE NO. SVM-06004

Location Part Location Part

No. No. No. No.

1 43T42324 BASE PLATE ASSEMBLY 23 43T39318 MOTOR BASE 2 43T41371 COMPRESSOR; 24 43T19330 PACKED VALVE COVER

PH340X3C-4KT1(Made in China) 25 43T00452 UPPER CABINET 3 43T49011 BASE; SPRING; A 26 43T96304 BUSHING 4 43T49012 BASE;SPRING; B 27 43T62325 ELECTRIC PART COVER(NEW) 5 43T49019 SPRING; BUFFER 28 43T61304 ELECTRIC PART BASE 6 43T97307 COMPRESSOR BOLT (M6) 29 43T52302 MAGNETIC CONTACTOR; 7 43T43371 CONDENSER ASSEMBLY AC220-240V 50Hz 8 43T00448 FIXING PLATE VALVE 30 43T55340 MF CAPACITOR (50uF 440V) 9 43T46308 VALVE;PACKED 6.35 DIA 31 43T55341 CAPACITOR;PLASTIC-FILM

10 43T46019 VALVE,PACKED 12.7 DIA 32 43T60352 TERMINAL BLOCK; 6P 11 43T47331 BONNET, 6.35 DIA 34 43T61305 MAGNETIC RELAY BASE 12 43T47333 BONNET, 12.70 DIA 35 43T19331 FIN GUARD 13 43T47013 CAPILLARY TUBE; 2.0 DIA 39 43T46337 4 WAY VALVE 14 43T00449 FRONT CABINET 40 43T46339 COIL;V-4WAY; 15 43T00458 LEFT CABINET AC220-240V 50Hz(NEW) 16 43T00451 RIGHT CABINET ASSEMBLY (NEW) 41 43T69059 SENSOR; TE 17 43T21378 FAN MOTOR;AC220-240V 50Hz 42 43T69060 SENSOR; TD 18 43T20319 PROPELLER FAN 43 43T79305 DRAIN NIPPLE 19 43T47001 NUT FLANGE 44 43T58301 TRANSFORMER; TT-05 20 43T19329 FAN GUARD 45 43T69336 PC Board 21 43T04301 PARTITION 46 43T60325 FILTER;CLAMP 22 43T39317 MOTOR BASE

CONNECTION PLATE(NEW)

Description Description

– 70 –

11-4. Outdoor Unit (RAS-24NA-E, RAS-24N2AX)

FILE NO. SVM-06004

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 BASE; SPRING; A 22 43T39317 MOTOR BASE 4 43T49012 BASE;SPRING; B CONNECTION PLATE(NEW) 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(NEW) 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 (50uF 440V) 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

– 71 –

11-5. Outdoor Unit (RAS -18NA-E, RAS-18N2AX)

FILE NO. SVM-06004

Location Part Location Part

No. No. No. No.

1 43T42324 BASE PLATE ASSEMBLY 19 43T47001 NUT FLANGE 2 43T41371 COMPRESSOR; 20 43T19329 FAN GUARD

PH340X3C-4KT1(Made in China) 21 43T04301 PARTITION 3 43T49011 BASE; SPRING; A 22 43T39317 MOTOR BASE 4 43T49012 BASE;SPRING; B CONNECTION PLATE(NEW) 5 43T49019 SPRING; BUFFER 23 43T39318 MOTOR BASE 6 43T97307 COMPRESSOR BOLT (M6) 24 43T19330 PACKED VALVE COVER 7 43T43369 CONDENSER ASSEMBLY 25 43T00452 UPPER CABINET 8 43T00448 FIXING PLATE VALVE 26 43T96304 BUSHING 9 43T46308 VALVE;PACKED 6.35 DIA 27 43T62325 ELECTRIC PART COVER(NEW)

10 43T46019 VALVE,PACKED 12.7 DIA 28 43T61304 ELECTRIC PART BASE 11 43T47331 BONNET, 6.35 DIA 29 43T52302 MAGNETIC CONTACTOR; 12 43T47333 BONNET, 12.70 DIA AC220-240V 50Hz 13 43T47013 CAPILLARY TUBE; 2.0 DIA 30 43T55340 MF CAPACITOR (50uF 440V) 14 43T00449 FRONT CABINET 31 43T55324 CAPACITOR; PLASTIC-FILM 15 43T00450 LEFT CABINET 32 43T60352 TERMINAL BLOCK; 6P 16 43T00451 RIGHT CABINET ASSEMBLY(NEW) 33 43T33002 SPARK-KILLER 17 43T21345 FAN-MOTOR(Made in China) 34 43T61305 MAGNETIC RELAY BASE 18 43T20319 PROPELLER FAN 35 43T19331 FIN GUARD

Description Description

– 72 –

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.

– 87 –

Toshiba RAS-18NKP-E, RAS-18NA-E user guide manual

Specifications and Main Features

Frequently Asked Questions

User Manual