Toshiba RAS-24UKP-E, RAS-18UA-E, RAS-24UA-E, RAS-18UAH-E, RAS-18UKHP-E SERVICE MANUAL

SERVICE MANUAL

AIR-CONDITIONER

RAS-24UKHP-E / RAS-24UAH-E

RAS-24UKP-E / RAS-24UA-E

FILE NO. SVM-01007

SPLIT WALL TYPE

RAS-24UKPX

/

RAS-24UAX

RAS-24UKP-AR / RAS-24UA-AR

RAS-24UKPX-T/RAS-24UAX-T

RAS-18UKHP-E/RAS-18UAH-E

RAS-18UKP-E/RAS-18UA-E

RAS-18UKPX/RAS-18UAX

RAS-18UKP-AR/RAS-18UA-AR

RAS-18UKPX-T/RAS-18UAX-T

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

24 Class18 Class

CONTENT

1. SPECIFICATIONS

1-1 RAS-24UKHP-E/24UAH-E, RAS-24UKP-E/24UA-E

RAS-24UKPX/24UAX, RAS-24UKP-AR/24UA-AR
RAS-24UKPX-T/24UAX-T

1-2 RAS-18UKHP-E/18UAH-E, RAS-18UKP-E/18UA-E

RAS-18UKPX/18UAX, RAS-18UKP-AR/18UA-AR

RAS-18UKPX-T/18UAX-T

2. CONSTRUCTION VIEWS

2-1 Indoor Unit (RAS-24UKHP-E, 24UKP-E, 24UKPX, 24UKP-AR, 24UKPX-T)
2-2 Indoor Unit (RAS-18UKHP-E, 18UKP-E, 18UKPX, 18UKP-AR, 18UKPX-T)
2-3 Outdoor Unit (RAS-24UAH-E, 24UA-E, 24UAX, 24UA-AR, 24UAX-T)

2-4 Outdoor Unit (RAS-18UAH-E, 18UA-E, 18UAX, 18UA-AR, 18UAX-T)

3. WIRING DIAGRAM

3-1 RAS-24UKHP-E/RAS-24UAH-E
3-2 RAS-24UKP-E/RAS-24UA-E

RAS-24UKPX/RAS-24UAX
RAS-24UKP-AR/RAS-24UA-AR

RAS-24UKPX-T/RAS-24UAX-T
3-3 RAS-18UKHP-E/RAS-18UAH-E
3-4 RAS-18UKP-E/RAS-18UA-E

RAS-18UKPX/RAS-18UAX

RAS-18UKP-AR/RAS-18UA-AR

RAS-18UKPX-T/RAS-18UAX-T

4. SPECIFICATION OF ELECTRICAL PARTS

4-1 Indoor Unit (RAS-24UKHP-E, 18UKHP-E)
4-2 Outdoor Unit (RAS-24UAH-E)
4-3 Outdoor Unit (RAS-18UAH-E)
4-4 Indoor Unit (RAS-24UKP-E, 24UKPX, 24UKP-AR, 24UKPX-T, 18UKP-E, 18UKPX,

18UKP-AR, 18UKPX-T)
4-5 Outdoor Unit (RAS-24UA-E, 24UAX, 24UA-AR, 24UAX-T)
4-6 Outdoor Unit (RAS-18UA-E, 18UAX, 18UA-AR, 18UAX-T)

5. REFRIGERATION CYCLE DIAGRAM

5-1 RAS-24UKHP-E/24UAH-E
5-2 RAS-24UKP-E/24UA-E

RAS-24UKPX/24UAX

RAS-24UKP-AR/24UA-AR

RAS-24UKPX-T/24UAX-T
5-3 RAS-18UKHP-E/18UAH-E, RAS-18UKP-E/18UA-E
5-4 RAS-18UKP-E/18UA-E

RAS-18UKPX/18UAX

RAS-18UKP-AR/18UA-AR

RAS-18UKPX-T/18UAX-T

– 1 –

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

6. CONTROL BLOCK DIAGRAM

6-1 RAS-24UKHP-E, 18UKHP-E
6-2 RAS-24UKP-E, 24UKPX, 24UKP-AR, 24UKPX-T

RAS-18UKP-E, 18UKPX, 18UKP-AR, 18UKPX-T

7. OPERATION DESCRIPTION

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

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 Other

9. TROUBLESHOOTING CHART

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

10. TROUBLESHOOTING CHART

10-1 Indoor Unit
10-2 Outdoor Unit (RAS-24UAH-E, 24UA-E, 24UAX, 24UA-AR, 24UAX-T)
10-3 Outdoor Unit (RAS-18UAH-E, 18UA-E, 18UAX, 18UA-AR, 18UAX-T)

11. EXPLODED VIEWS AND PARTS LIST

11-1 Indoor Unit (1)
11-2 Indoor Unit (2)
11-3 Indoor Unit (3)
11-4 Outdoor Unit (1)
11-5 Outdoor Unit (2)
11-6 Outdoor Unit (3)
11-7 Outdoor Unit (4)
11-8 Outdoor Unit (5)

– 2 –

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

1. SPECIFICATIONS

1-1

ITEM

Capacity kW

Power source

Power consumption W

Power factor %

Running current A

Starting current A 60 50

Moisture removal lit/h 2.5 2.7

Noise

Refrigerant

Refrigerant control Capillary tube
Interconnection
pipe

INDOOR UNIT RAS-24UKHP-E RAS-24UKP-E RAS-24UKPX RAS-24UKP-AR RAS-24UKPX-T

Dimensions Height mm 298

Net weight kg 12

Evaporator type Finned tube

Indoor fan type Cross flow fan

Air volume High fan m3/h 950

Fan motor output W 30

Air filter Honeycomb woven filter with PP frame

OUTDOOR UNIT RAS-24UAH-E RAS-24UA-E RAS-24UAX RAS-24UA-AR RAS-24UAX-T

Dimensions Height mm 690

Net weight kg 66 65 65 65 65
Condenser type Finned tube

Outdoor fan type Propeller fan

Airflow volume 3380 3560 3380 3560 3380 3560 3380 3560 3380

Fan motor output W 65

Compressor Model PH310X3-4MM PH280X3-4MS

Safety device IOL, Td Sensor IOL

Louver type Automatic louver

Usable outdoor temperature range°C 15 ~ 43 -10 ~ 24 15 ~ 43 15 ~ 43 15 ~ 52 15 ~ 43

Indoor (H/M/L) dB 45/41/37

Outdoor (220-240V) dB 56-57 57-58 56-57 56

Name of refrigerant R22

Rated amount kg 1.63

Gas side size mm

Connection type Flare connection

Liquid side size mm

Connection type Flare connection

Maximum length

(One way) 25

Maximum height difference

Width mm 998

Depth mm 208

Medium fan m3/h 750 800 750

Low fan m3/h 600 650 600

Width mm 880

Depth mm 310

Output W 2200 2000

MODEL

Indoor / Outdoor

RAS-24UKHP-E/24UAH-E RAS-24UKP-E/24UA-E RAS-24UKPX/24UAX RAS-24UKP-AR/24UA-AR RAS-24UKPX-T/24UAX-T

Cooling Heating Cooling Cooling Cooling Cooling

220V 240V 220V 240V 220V 240V 220V 240V 220V 240V 220V

6.30 6.30 6.80 6.90 6.40 6.45 6.40 6.45 6.40 6.45 6.40

Phase 1Ø

V 220 – 240 220

Hz 50

2430 2510 2430 2530 2350 2440 2350 2440 2350 2440 2350

96 91 96 91 96 91 96 91 96 91 96

220V 240V 220V 240V 220V 240V 220V 240V 220V 240V 220V

0.3/ 0.3/ 0.3/ 0.3/

11.2 11.1 11.2 11.2

m

m

0.3/10.9 0.3/10.8 0.3/10.9 0.3/10.8 0.3/10.9 0.3/10.8 0.3/10.9

Ø

15.88

Ø 6.35

*1

15

*2

10

– 3 –

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

1-2

ITEM

MODEL

Capacity kW

Power source

Power consumption W

Power factor %

Running current A

Indoor / Outdoor

Starting current A 40

Moisture removal lit/h 2

Noise Indoor (H/M/L) dB 42/39/35

Outdoor (220-240V) dB 52-53 53-54 51 52 51 52 52 53 51

Refrigerant

Name of refrigerant R22

Rated amount kg 1.29 1.06 1.17 1.06

Refrigerant control Capillary tube
Interconnection
pipe

Gas side size mm

Connection type Flare connection

Liquid side size mm

Connection type Flare connection

Maximum length

(One way) 20

Maximum height difference

INDOOR UNIT

Dimensions Height mm 298

Width mm 998

Depth mm 208

Net weight kg 12

Evaporator type Finned tube

Indoor fan type Cross flow fan

Air volume High fan m3/h 750 800 750

Medium fan m3/h 650 700 650

Low fan m3/h 530 570 530

Fan motor output W 30

Air filter Honeycomb woven filter with PP frame

OUTDOOR UNIT

Dimensions Height mm 538

Width mm 830

Depth mm 300

Net weight kg 54 50 54 50
Condenser type Finned tube

Outdoor fan type Propeller fan

Airflow volume 2105 2310 1830 2010 1830 2010 2105 2310 1830

Fan motor output W 65 42 65 42

Compressor Model PH250X3-4LM

Output W 1500

Safety device IOL, Td Sensor IOL

Louver type Automatic louver

Usable outdoor temperature range°C 15 ~ 43 -10 ~ 24 15 ~ 43 15 ~ 43 15 ~ 52 15 ~ 43

RAS-18UKHP-E/18UAH-E RAS-18UKP-E/18UA-E RAS-18UKPX/18UAX RAS-18UKP-AR/18UA-AR RAS-18UKPX-T/18UAX-T

Cooling Heating Cooling Cooling Cooling Cooling

220V 240V 220V 240V 220V 240V 220V 240V 220V 240V 220V

5.05 5.05 5.80 5.90 5.20 5.25 5.20 5.25 5.20 5.25 5.20

Phase 1Ø

V 220 – 240 220

Hz 50

1920 2040 1800 1950 1870 1950 1870 1950 1920 2040 1870

95 88 94 86 95 88 95 88 95 88 95

220V 240V 220V 240V 220V 240V 220V 240V 220V 240V 220V

0.2/ 0.2/ 0.2/ 0.2/

9.0 9.5 8.5 9.2

m

m

RAS-18UKHP-E RAS-18UKP-E RAS-18UKPX RAS-18UKP-AR RAS-18UKPX-T

RAS-18UAH-E RAS-18UA-E RAS-18UAX RAS-18UA-AR RAS-18UAX-T

0.2/8.75 0.2/9.0 0.2/8.75 0.2/9.0 0.2/9.0 0.2/9.5 0.2/8.75

Ø

12.7

Ø

6.35

*1

15

*2

8

– 4 –

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

Note : 1

• Capacity is based on the following temperature conditions.

Condition

Temperature

Indoor unit inlet air temperature

(WB) 19 °C 12 °C

Outdoor unit inlet air temperature

(WB) 24

Note : 2

• Charge refrigerant according to the table below.

RAS-24UKHP-E/24UAH-E

RAS-24UKP-E/24UA-E

Refrigerant

1 No need to charge

*

refrigerant

2 Need to charge

*

refrigerant

RAS-24UKPX/24UAX

RAS-24UKP-AR/24UA-AR

RAS-24UKPX-T/24UAX-T

15m or less

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

Cooling Heating

(DB) 27

(DB) 35

JIS C9612-1994

°C 20 °C

°C 7 °C

°C 6 °C

RAS-18UKHP-E/18UAH-E

RAS-18UKP-E/18UA-E

RAS-18UKPX/18UAX

RAS-18UKP-AR/18UA-AR

RAS-18UKPX-T/18UAX-T

15m or less

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

– 5 –

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

2-1. Indoor Unit
RAS-24UKHP-E
RAS-24UKP-E
RAS-24UKPX
RAS-24UKP-AR
RAS-24UKPX-T

Back body

Front panel

Grille inlet

298

2. CONSTRUCTION VIEWS

998

208

75

7

51

Knock out system

Outline of indoor unit

55 or more

Minimum distance

to ceiling

298

Connecting pipe (0.39m)

(Flare ø15.88)

20

48

998

763.5

450

Drain hose (0.54m)

Connecting pipe (0.49m)

(Flare ø6.35)

20

10

75

50

56

For stud bolt (ø6)

For stud bolt (ø8 – ø10)

29

41

55
5555

50

Knock out system

57

Wireless remote
control

48

18

75

8

160

ø65

40

ø65

100

Installation
Plate outline

100

– 6 –

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

2-2. Indoor Unit
RAS-18UKHP-E
RAS-18UKP-E
RAS-18UKPX
RAS-18UKP-AR
RAS-18UKPX-T

Back body

Front panel

Grille inlet

298

998

208

75

7

51

Knock out system

Outline of indoor unit

55 or more

Minimum distance

to ceiling

298

Connecting pipe (0.39m)

(Flare ø12.7)

20

48

998

763.5

450

Drain hose (0.54m)

Connecting pipe (0.49m)

(Flare ø6.35)

20

10

75

50

56

For stud bolt (ø6)

For stud bolt (ø8 – ø10)

29

41

55
5555

50

Knock out system

57

Wireless remote
control

48

18

75

8

160

ø65

40

ø65

100

Installation
Plate outline

100

– 7 –

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

2-3. Outdoor Unit
RAS-24UAH-E
RAS-24UA-E
RAS-24UAX
RAS-24UA-AR
RAS-24UAX-T

4-ø12x18

for ø8 – ø10

anchor bolt

600 or

more

600

or more

600

Air inlet

Mounting dimension of anchor bolt

100 or

more

52

68

ø25 Drain outlet

120

Air outlet

100

or more

140

600

310

23

Electric

Parts cover

Liquid side

(Flare ø6.35)

Gas side

(Flare ø15.88)

Service Port

12

364

340 (pitch)

12

88

74

Handle

880

A

Detail Drawing

A

600

63.8

340

27

ø12x18 hole

50

340

4-ø12x18 holes

(for ø8 – ø10 anchor bolt)

690

– 8 –

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

Handle

2-4. Outdoor Unit
RAS-18UAH-E
RAS-18UA-E
RAS-18UAX

600 or more

600

Air inlet

RAS-18UA-AR
RAS-18UAX-T

anchor bolt

4xø11x14

for ø8-ø10

600 or

more

Electric

Parts cover

Liquid side

(Flare ø6.35)

Gas side

(Flare ø12.7)

Installation dimension

120

Air inlet

325

100 or more

Air

outlet

100 or more

8-ø6 holes

(for fixing outdoor unit)

6-ø11x14 holes

(for ø8 – ø10 anchor bolt)

ø25 Drain outlet

344

Service Port

91 54

160

50

90

600

830

A

A Detail Drawing

600

R10

52

325

ø6 hole

ø11x14 hole

Fan guard

Handle

ø420

538

– 9 –

90

300

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

3. WIRING DIAGRAM

3-1. RAS-24UKHP-E/RAS-24UAH-E

COLOR IDENTIFICATION

GRN&YEL

BLK

P04

VARISTOR

SG01
DSA

T6. 3A 250V

F01 FUSE

BLK
WHI
RED

GRN&YEL

CN30
CN31

CN23

BRW

RED
WHI
YEL
BLU
BLK

GRY

PNK

ORN

GRN

R22

:

BROWN

:

RED

:

WHITE

:

YELLOW

:

BLUE

:

BLACK
GRAY

:

PINK

:

ORANGE

:

GREEN &

:
:

GREEN

YELLOW

R09

R21

LOUVER
MOTOR

BLU

6
6

IC04

L01

R01

DB01

C15

C01

MAIN P.C. BOARD

(MCC-821)

CN13

3

4

1

2

5

6

7 8 9

3

4

1

2

5

6

7 8 9

BLU

BLU

BLU

BLU

BLU

BLU

BLU

BLU

3

4

1

2

3

4

1

2

INFRARED RAYS RECEIVE
AND INDICATION PARTS

BLU

5

6

7 8 9

5

6

7 8 9

ORN

PNK

YEL

4

3

5

4

3

5

CN 07

CN03 CN01

10
10

WHI

10

CN25

10

FAN MOTOR

RED

BRW

6

2

1

6

2

1

C02

IC

IC01

2

1

2

1

THERMO

BLK

BLK

SENSOR

(TA)

DC MOTOR

4

3

5

4

3

5

CN 10

T01

C06

1
1

BLK

1
1

IC02

2
2

BLK

EXCHANGER

SENSOR

DC15V

DC0V
DC12V

DC7V

DC0V

HEAT

(TC)

POWER
TERMINAL
BLOCK

POWER SUPPLY
220-240 V~, 50 Hz

i

L

N

BLK
RED
GRN&YEL

REDBLK

CAPACITOR

RED

WHI
PNK

COMPRESSOR

INDOOR
TERMINAL
BLOCK

OUTDOOR
TERMINAL
BLOCK

FERRITE CORE

S

C

R

BLK

3

1

2

1

2

3

MAGNETIC SWITCH

T

S

W

V

INDOOR
UNIT

OUTDOOR

i

UNIT

GRN&YEL

i

CHASSIS

R

U

A1

52C

A2

CAPACITOR

RED

WHI
RED

FAN MOTOR

BLK

– 10 –

TRANSFORMER

COIL FOR
4 WAY VALVE

BLK

BLK

RED

RED

BLK

BLK

WHI

RED

GRY

BLU

YEL

BLK

BLK

1

3

1

3

1

3

5

7

9

1

3

1

313

1

313

MAIN P.C. BOARD (MCC-1275)

1
2

CN06

3

1

CN05

3

TNR

DSA

R74

1

F01

3

T5A 250VAC

5

CN01

7

9

1

3

CN04

5

CN11

CR11

CN02

CR12

CN03

1
1

BLK

TNR
R73

RY07

RY05

3

TNR R96

ICO7

CN07

CN08

DISCHARGE
PIPE
SENSOR (TD)

BLK

1

1
2
3

3

BLK

BLK

1

1
2
3

3

BLK

HEAT
EXCHANGER
SENSOR (TE)

TCTC Service Manual 18/24UKHP-E (EN) File No. SVM-01006

3-2. RAS-24UKP-E/RAS-24UA-E

RAS-24UKPX/RAS-24UAX
RAS-24UKP-AR/RAS-24UA-AR
RAS-24UKPX-T/RAS-24UAX-T

BLK
WHI

RED

GRN&YEL

CN27

COLOR IDENTIFICATION

GRN&YEL

BLK

P04

SG01
DSA

CN30
CN31

11

3

BRW

RED

WHI
YEL
BLU

BLK
GRY
PNK
ORN

R22

VARISTOR

T6.3A 250V

F01 FUSE

BROWN

:

RED

:

WHITE

:
:

YELLOW

:

BLUE

:

BLACK

:

GRAY

:

PINK

:

ORANGE

:

GREEN &

:

GREENGRN

RY04

YELLOW

R09

R21

LOUVER
MOTOR

BLU

6
6

IC04

L01

R01

DB01

C15

C01

MAIN P.C. BOARD

(MCC-821)

CN13

3

4

1

2

5

6

7 8 9

3

4

1

2

5

6

7 8 9

BLU

BLU

BLU

BLU

BLU

BLU

BLU

BLU

3

4

1

2

3

4

1

2

INFRARED RAYS RECEIVE
AND INDICATION PARTS

BLU

5

6

7 8 9

5

6

7 8 9

ORN

PNK

YEL

RED

4

3

5

2

4

3

5

2

CN 07

CN03 CN01

10
10

WHI

10

CN25

10

FAN MOTOR

DC MOTOR

BRW

6

1

6

1

CN 10

C02

IC

IC01

2

1

2

1

BLK

BLK

THERMO
SENSOR

(TA)

5
5

C06

4
4

T01

3
3

1
1

BLK

1
1

IC02

2
2

BLK

EXCHANGER

SENSOR

DC15V

DC0V
DC12V

DC7V

DC0V

HEAT

(TC)

POWER SUPPLY
220 – 240V ~ 50Hz.
220V ~ 50Hz (Only RAS-24UAX-T)

POWER
TERMINAL
BLOCK

BLK

L

N

RED RED

BLK
RED

GRN&YEL

BLK BLK

SPARK KILLER

A1 A2

52C

R

U

S

V

T

W

MAGNETIC SWITCH

INDOOR
TERMINAL
BLOCK

OUTDOOR
TERMINAL
BLOCK

FERRITE CORE

RED

CAPACITOR

WHI
PNK

– 11 –

3

1

2

3

1

2

GRN&YEL

CHASSIS

GRY

RED

CAPACITOR

S

R

COMPRESSOR

INDOOR
UNIT

OUTDOOR
UNIT

BLK

C

WHI
RED

FAN MOTOR

BLK

TCTC Service Manual 18/24UKHP-E (EN) File No. SVM-01006

3-3. RAS-18UKHP-E/RAS-18UAH-E

COLOR IDENTIFICATION

BRW

ORN

GRN&YEL

SG01
DSA

R22

VARISTOR

T6.3A 250V

F01 FUSE

BLK
WHI
RED

GRN&YEL

BLK

P04

CN30

CN31

CN23

RED

WHI

YEL

BLU

BLK
GRY
PNK

GRN

BROWN

:

RED

:

WHITE

:

YELLOW

:

BLUE

:

BLACK

:

GRAY

:

PINK

:

ORANGE

:
:

GREEN &

:

GREEN

YELLOW

R09

R21

LOUVER
MOTOR

BLU

6
6

IC04

L01

R01

DB01

C15

C01

MAIN P.C. BOARD

(MCC-821)

CN13

3

4

1

2

5

6

7 8 9

3

4

1

2

5

6

7 8 9

BLU

BLU

BLU

BLU

BLU

BLU

BLU

BLU

3

4

1

2

3

4

1

2

INFRARED RAYS RECEIVE
AND INDICATION PARTS

BLU

5

6

7 8 9

5

6

7 8 9

ORN

PNK

YEL

RED

4

3

5

2

4

3

5

2

CN 07

CN03 CN01

10
10

WHI

10

CN25

10

FAN MOTOR

DC MOTOR

BRW

6

1

6

1

CN 10

+

C02

IC

IC01

2

1

2

1

THERMO

BLK

BLK

SENSOR

(TA)

5
5

C06

4
4

T01

3
3

1
1

BLK

2
2

BLK

1
1

DC15V

DC0V
DC12V

DC7V

DC0V

IC02

HEAT

EXCHANGER

SENSOR

(TC)

POWER
TERMINAL
BLOCK

POWER SUPPLY
220-240V~ 50 Hz

L

i

N

BLK
RED
GRN&YEL

REDBLK

RED

WHI
PNK

COMPRESSOR

INDOOR
TERMINAL
BLOCK

OUTDOOR
TERMINAL
BLOCK

FERRITE CORE

CAPACITOR

S

R

C

BLK

1

2

1

2

MAGNETIC RELAY

11

121314

3

3

i

CHASSIS

INDOOR
UNIT

OUTDOOR
UNIT

GRN&YEL

i

15

A

B

16

RED

WHI
RED

FAN MOTOR

CAPACITOR

BLK

TRANSFORMER

COIL FOR
4 WAY VALVE

BLK

BLK

RED

RED

BLK

BLK

WHI

RED

GRY

BLU

YEL

BLK

BLK

1

3

1

3

1

3

5

7

9

1

3

1

313

1

313

MAIN P.C. BOARD (MCC-1275)

1
2

CN06

3

1

CN05

3

TNR

DSA

R74

1

F01

3

T5A 250VAC

5

CN01

7

9

1

3

CN04

5

CN11

CR11

CN02

CR12

CN03

1
1

BLK

TNR
R73

RY07

RY05

3

TNR R96

IC07

CN07

CN08

DISCHARGE
PIPE
SENSOR (TD)

BLK

1

1
2
3

3

BLK

BLK

1

1
2
3

3

BLK

HEAT
EXCHANGER
SENSOR (TE)

– 12 –

TCTC Service Manual 18/24UKHP-E (EN) File No. SVM-01006

3-4. RAS-18UKP-E/RAS-18UA-E

RAS-18UKPX/RAS-18UAX
RAS-18UKP-AR/RAS-18UA-AR
RAS-18UKPX-T/RAS-18UAX-T

BLK
WHI
RED

GRN&YEL

CN30
CN31

CN27

COLOR IDENTIFICATION

GRN&YEL

BLK

P04

11

VARISTOR

SG01
DSA

3

BRW

BROWN

:

RED

RED

:

WHI

WHITE

:

YEL

YELLOW

:

BLU

BLUE

:

BLK

BLACK

:

GRY

GRAY

:

PNK

PINK

:

ORN

ORANGE

:

GREEN &

:

GREENGRN

R22

T6.3A 250V

F01 FUSE

YELLOW

RY04

R09

R21

LOUVER
MOTOR

BLU

6
6

IC04

L01

R01

DB01

C15

C01

MAIN P.C. BOARD

(MCC-821)

CN13

3

4

1

2

5

6

7 8 9

3

4

1

2

5

6

7 8 9

BLU

BLU

BLU

BLU

BLU

BLU

BLU

BLU

3

4

1

2

3

4

1

2

INFRARED RAYS RECEIVE
AND INDICATION PARTS

BLU

5

6

7 8 9

5

6

7 8 9

PNK

YEL

RED

ORN

4

3

5

2

1

4

3

5

2

1

CN 07

+

CN03 CN01

1

10

1

10

WHI

BLK

10

CN25

10

FAN MOTOR

DC MOTOR

BRW

4

6

5

4

6

5

CN 10

T01

C02

C06

IC

IC01

2
2

BLK

THERMO
SENSOR

(TA)

3
3

1
1

BLK

2
2

BLK

1
1

DC15V

DC0V
DC12V

DC7V

DC0V

IC02

HEAT

EXCHANGER

SENSOR

(TC)

POWER SUPPLY
220 – 240V~ 50Hz
220V ~ 50Hz (Only RAS-18UAX-T)

POWER
TERMINAL
BLOCK

BLK

L

N

GRN&YEL

RED

BLK

CAPACITOR CAPACITOR

RED

PNK

COMPRESSOR

BLK
RED

INDOOR
TERMINAL
BLOCK

OUTDOOR
TERMINAL
BLOCK

MAGNETIC RELAY

11

121314

S

C

BLK

R

3

1

2

3

1

2

BLK

BLK

SPARK KILLER

RED

15

A

B

16

RED

WHIWHI

RED

INDOOR
UNIT

OUTDOOR
UNIT

GRN&YEL

CHASSIS

GRY

BLK

FAN MOTOR

– 13 –

TCTC Service Manual 18/24UKHP-E (EN) File No. SVM-01006

4. SPECIFICATION OF ELECTRICAL PARTS

4-1. Indoor Unit
RAS-24UKHP-E, RAS-18UKHP-E

No. Parts name Type Specifications

1 Fan motor (for indoor) ICF-340-30-1 Output (Rated) 30W, 220-240V

Thermo sensor

2

(TA-sensor)

3 DC-DC transformer (T01) SWT-58A DC 390V, Secondary DC 15V, 12V, 7V

4 Microcomputer TMP87CM40AN

Heat exchanger sensor

5

(TC-sensor)

6 Line filter (L01) SS11V-R07190 19mH, AC0.7A

7 Diode (DB01) D3SBA60 4A, 600V

8 Capacitor (C02) KMH450VNSN120M25C 120µF, 450V

9 Fuse (F01) TSCR T6.3A, 250V

10 Power supply IC (IC01) MA8920 5A, 900V

11 Varistor (R21, R22) 15G561K 560V

12 Resistor (R01) RF-5TK4R7 4.7 , 5W

——— 10k at 25 °C

——— 10k at 25 °C

13 Louver motor MP35EA12 Output (Rated) 2W,10poles, 1phase, DC 12V

4-2. Outdoor Unit
RAS-24UAH-E

No. Parts name Type Specifications

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

1 Compressor PA290X3F-4MS

2 Fan motor (for outdoor) MMF-230-65F

3 Running capacitor (for fan motor) SK45FMP AC 450V, 3.5µF

Running capacitor

4

(for compressor)

5 Solenoid coil (for 4-way valve) VHV AC 220 – 240V

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

7 Magnetic switch CLK-35J 220 – 240V, 50Hz

SK42CMP45U1 AC 420V, 45µF

Winding resistance ( )

(at 20°C)

Output (Rated) 65W, 6poles,1phase, 220 – 240V, 50Hz

Winding resistance ( )

(at 20°C)

Red-Black White-Black

1.07 2.20

Red-Black White-Black

71.2 139.0

8 Transformer FT67 220 – 240V

9 Microcomputer TMP47C840N

10 Varistor (R73, 74, 86) 15G471K 470V

11 Fuse (F01) MT3 T5A, 250V

– 14 –

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

4-3. Outdoor Unit
RAS-18UAH-E

No. Parts name Type Specifications

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

1 Compressor PA225X3F-4L

2 Fan motor (for outdoor) HF-240-42A1

3 Running capacitor (for fan motor) SK45FMP02U2 AC 450V, 2µF

Running capacitor

4

(for compressor)

5 Solenoid coil (for 4-way valve) VHV AC 220 – 240V

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

7 Magnetic Relay VC20FA 220

8 Transformer FT67 220

9 Microcomputer TMP47C840N

10 Varistor (R73, 74, 86) 15G471K 470V

SK42CMP45U1 AC 420V, 45µF

Winding resistance ( )

(at 20°C)

Output (Rated) 42W, 6poles,1phase, 220 – 240V, 50Hz

Winding resistance ( )

(at 20°C)

–

240V, 50Hz, 1P1a

–

240V

Red-Black White-Black

Red-Black White-Black

176.2 290.5

1.35 2.68

11 Fuse (F01) MT3 T5A, 250V

– 15 –

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

4-4. Indoor Unit
RAS-24UKP-E, 24UKPX, 24UKP-AR, 24UKPX-T

RAS-18UKP-E, 18UKPX, 18UKP-AR, 18UKPX-T

No. Parts name Type Specifications

1 Fan motor (for indoor) ICF-340-30-1 Output (Rated) 30W, 220-240V

Thermo sensor

2

(TA-sensor)

3 DC-DC transformer (T01) SWT-58A DC 390V, Secondary DC 15V, 12V, 7V

4 Microcomputer TMP87CM40AN

Heat exchanger sensor

5

(TC-sensor)

6 Line filter (L01) SS11V-R07190 19mH, AC 0.7A

7 Diode (DB01) D3SBA60 4A, 600V

8 Capacitor (C02) KMH450VNSN120M25C 120µF, 450V

9 Fuse (F01) TSCR T6.3A, 250V

Relay (for outdoor fan motor,

10

solenoid coil) (RY04)

11 Power supply IC (IC01) MA8920 5A, 900V

12 Varistor (R21, R22) 15G561K 560V

——— 10k at 25°C

°

——— 10k at 25

AJQ1341 Coil DC 12V, 33mA, Rated 1A, AC 250V

C

13 Resistor (R01) RF-5TK4R7 4.7 , 5W

14 Louver motor MP35EA12 Output (Rated) 2W,10poles, 1phase, DC 12V

4-5. Outdoor Unit
RAS-24UA-E, 24UAX, 24UA-AR, 24UAX-T

No. Parts name Type Specifications

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

1 Compressor PA290X3F-4MS

2 Fan motor (for outdoor)

2 Winding resistance ( )

3 Running capacitor (for fan motor) SK45FMP AC 450V, 3.5µF

Running capacitor

4

(for compressor)

5 Bimetal thermostat CS-7C Open 130 ± 5°C, Close 70 ± 10°C

6 Magnetic switch CLK-35J 220 – 240V, 50Hz

MMF-230-65C

SK42CMP45U1 AC 420V, 45µF

Winding resistance ( )

(at 20°C)

Output (Rated) 65W, 6poles,1phase, 220 – 240V, 50Hz

(at 20°C)

Red-Black White-Black

1.07 2.20

Red-Black White-Black

71.2 139.0

– 16 –

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

4-6. Outdoor Unit
RAS-18UA-E, 18UAX, 18UA-AR, 18UAX-T

No. Parts name Type Specifications

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

1 Compressor PA225X3F-4L

2 Fan motor (for outdoor) HF-240-42A

3 Running capacitor (for fan motor) SK45FMP02U2 AC 450V, 2µF

Running capacitor

4

(for compressor)

5 Bimetal thermostat CS-7C Open 130 ± 5°C, Close 70 ± 10°C

SK42CMP45U1 AC 420V, 45µF

Winding resistance ( )

(at 20°C)

Output (Rated) 42W, 6poles,1phase, 220–240V, 50Hz

Winding resistance ( )

(at 20°C)

Red-Black White-Black

Red-Black White-Black

176.2 290.5

1.35 2.68

6 Magnetic Relay VC20FA 220

–

240V, 50Hz, 1P1a

– 17 –

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

5. REFRIGERATION CYCLE DIAGRAM

5-1. RAS-24UKHP-E/24UAH-E

Indoor unit

Cooling

0.39m
(Connecting pipe)

15.88

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

Cooling

Heating

Heating

P

Packed valve

( 15.88 )

Gas container connection (Reinstall etc.)

Heating

4-way valve

Muffler

Cooling

Compressor

Accumulator

PH310X3-4MM

Condenser

Evaporator

Cross flow fan

T

0.49m
(Connecting pipe)

6.35

Packed valve

( 6.35)

Capillary tube

0.8x500S

Liquid tank

25x140S

Capillary tube

2.4x1400S

Refrigerant
R-22 1.63kg

Fan Speed

(indoor)

Ambient temp.

conditions DB/WB

(°C)

Indoor Outdoor

50Hz

Cooling
Heating

Propeller fan
Outdoor unit

Standard

Pressure P

(MPaG)

Mark ( ) means check points of Gas Leak

Surface temp. of heat

exchanger interchanging

pipe T (°C)

Standard 0.4 43.0 High 20/– 7/6

Heating High temperature*1 0.5 ~ 0.7 52.0 ~ 59.0 Low 27/– 24/18

Low temperature 0.3 36.0 High 20/– –10/–10

Standard 0.4 11.0 High 27/19 35/24

Cooling High temperature 0.5 12.0 High 32/23 43/26

Low temperature 0.3 1.0 Low 21/15 21/15

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

– 18 –

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

5-2. RAS-24UKP-E/24UA-E

RAS-24UKPX/24UAX
RAS-24UKP-AR/24UA-AR
RAS-24UKPX-T/24UAX-T

Indoor unit

Cooling

0.39m
(Connecting pipe)

15.88

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

Cooling

P

Packed valve

( 15.88 )
Gas container connection (Reinstall etc.)

Cooling

Compressor

Accumulator

PH280X3-4MS

Condenser

Evaporator

Cross flow fan

T

0.49m
(Connecting pipe)

6.35

Packed valve

( 6.35)

Capillary tube

0.8x400S

Capillary tube

2.4x1400S

Liquid tank

25x140S

Refrigerant
R-22 1.63kg

Fan Speed

(indoor)

Ambient temp.

conditions DB/WB

Indoor Outdoor

50Hz

Cooling

Propeller fan

Outdoor unit

Standard

Pressure P

(MPaG)

Mark ( ) means check points of Gas Leak

Surface temp. of heat

exchanger interchanging

pipe T (°C)

Standard 0.4 11.0 High 27/19 35/24

Cooling

High temperature 0.7 12.0 High 32/23 52/31*

Low temperature 0.3 1.0 Low 21/15 21/15

* SASO Standard’s condition

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

(°C)

– 19 –

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

5-3. RAS-18UKHP-E/18UAH-E

Indoor unit

Cooling

0.49m
(Connecting pipe)

12.7

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

Cooling

Heating

Heating

P

Packed valve

( 12.7)

Gas container connection (Reinstall etc.)

Heating

4-way valve

Muffler

Cooling

Compressor

Accumulator

PH250X3-4LM

Evaporator

Cross flow fan

T

0.39m
(Connecting pipe)

6.35

Packed valve

( 6.35)

Capillary tube

0.8x500S

Capillary tube

1.2x1500S

Capillary tube

2.0x1200S

Condenser

Refrigerant
R-22 1.29kg

Fan Speed

(indoor)

Ambient temp.

conditions DB/WB

(°C)

Indoor Outdoor

50Hz

Cooling
Heating

Propeller fan

Outdoor unit

Standard

Pressure P

(MPaG)

Mark ( ) means check points of Gas Leak

Surface temp. of heat

exchanger interchanging

pipe T (°C)

Standard 0.4 45.0 High 20/– 7/6

Heating High temperature*1 0.5 ~ 0.6 49.0 ~ 58.0 Low 27/– 24/18

Low temperature 0.3 34.0 High 20/––10/–10

Standard 0.4 10.0 High 27/19 35/24

Cooling High temperature 0.5 15.0 High 32/23 43/26

Low temperature 0.3 1.0 Low 21/15 21/15

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

– 20 –

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

5-4. RAS-18UKP-E/18UA-E

RAS-18UKPX/18UAX
RAS-18UKPX-T/18UAX-T

Indoor unit

Evaporator

T

(Connecting pipe)

0.39m

12.7
Cross flow fan

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

Compressor

P

Packed valve

( 12.7)

PH250X3-4LM

Muffler

Condenser

Propeller fan

Outdoor unit

Packed valve

( 6.35)

Capillary tube

2.4x1000

Refrigerant
R-22 1.06 kg

Mark ( ) means check points of Gas Leak

S

0.49m
(Connecting pipe)

6.35

Ambient temp.

conditions DB/WB

Indoor Outdoor

50Hz

Standard

Pressure P

(MPaG)

Surface temp. of heat

exchanger interchanging

pipe T (°C)

Fan Speed

(indoor)

Standard 0.4 10.0 High 27/19 35/24

Cooling

High temperature 0.5 13.0 High 32/23 43/26

Low temperature 0.3 2.0 Low 21/15 21/15

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

(°C)

– 21 –

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

5-5. RAS-18UKP-AR/18UA-AR

Indoor unit

Evaporator

(Connecting pipe)

0.39m

12.7

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

Compressor

P

Packed valve

( 12.7)

PH250X3-4LM

Cross flow fan

Condenser

Propeller fan

T

Capillary tube

0.8x900

S

Packed valve

( 6.35)

Capillary tube

2.0x1000

Refrigerant
R-22 1.17 kg

S

0.49m
(Connecting pipe)

6.35

Mark ( ) means check points of Gas Leak

Ambient temp.

Fan Speed

conditions DB/WB

(indoor)

Indoor Outdoor

50Hz

Outdoor unit

Standard

Pressure P

(MPaG)

Surface temp. of heat

exchanger interchanging

pipe T (°C)

Standard 0.4 10.0 High 27/19 35/24

Cooling

High temperature 0.6 13.0 High 32/23 52/31

Low temperature 0.3 2.0 Low 21/15 21/15

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

(°C)

– 22 –

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

6. CONTROL BLOCK DIAGRAM

6-1. RAS-24UKHP-E, 18UKHP-E

Indoor Unit Control Panel

Heat Exchanger Sensor

Temperature Sensor

M.C.U.

Functions

• Louver Control

• 3-minute Delay at Restart for Compressor

Operation

Display

Timer

Display

Infrared Rays Signal Receiver

Infrared

Initiallizing Circuit

Rays

Clock Frequency

Oscillator Circuit

Power Supply

Remote

Circuit

Control

Noise Filter

From Outdoor Unit

REMOTE CONTROL

• Motor Revolution Control

• Processing

(Temperature Processing)

• Timer

• Serial Signal Communication

Louver ON/OFF Signal

Serial Signal Transmitter/Receiver

Serial Signal Communication

Remote Control

Louver Driver

Infrared Rays

Filter Sign

Display

PRE DEF.

Sign Display

Hi Power Sign

Display

Indoor Fan

Motor

Louver Motor

Operation (START/STOP)

Operation Mode Selection

AUTO, COOL, DRY, HEAT, FAN ONLY

Temperature Setting

Fan Speed Selection

ON TIMER Setting

OFF TIMER Setting

Louver Auto Swing

Louver Direction Setting

ECO

Hi power

Filter Reset

Sleep Timer Setting

– 23 –

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

6-2. RAS-24UKP-E, 24UKPX, 24UKP-AR, 24UKPX-T

RAS-18UKP-E, 18UKPX, 18UKP-AR, 18UKPX-T

Indoor Unit Control Panel

M.C.U.

Heat Exchanger Sensor

Functions

• Louver Control

Operation

Display

Temperature Sensor

Infrared Rays Signal Receiver

Initiallizing Circuit

Infrared

Rays

Clock Frequency
Oscillator Circuit

Power Supply

Remote

Circuit

Control

Noise Filter

From Outdoor Unit

• 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 (START/STOP)

Operation Mode Selection

AUTO, COOL, DRY, FAN ONLY

Temperature Setting

Fan Speed Selection

ON TIMER Setting

OFF TIMER Setting

Louver Auto Swing

Louver Direction Setting

ECO

Hi power

Filter Reset

Sleep Timer Setting

– 24 –

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

7. OPERATION DESCRIPTION

7-1. Outline of Air Conditioner Control

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

(1) Role of indoor unit controller

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

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

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

• Louver motor control

• Indoor fan motor operation control

• LED display control

• Transferring of operation commands to the
outdoor unit

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

(2) Role of outdoor unit controller

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

• Compressor operation

control

• Operation control of

outdoor fan motor

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

• Defrost control in heating operation (Temperature
measurement by the outdoor heat exchanger and
control for the four-way valve and the outdoor fan
motor) *Heating and Cooling Model only

Operations according to
the commands from the
indoor unit

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 [SET] button.
The louver position which is set by [SET] button is
stored in the microcomputer, and the louver is auto­matically set at the stored position for the next opera­tion.

(2) Swing

If [SWING] button is pressed when the indoor unit is
in operation, the vertical air flow louver starts swing­ing. When [SWING] button is pressed again, it stops
swinging.

7-1-2. Indoor Fan Control (DC Fan Motor)

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

change DC 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.

Table 7-1-1

RAS-24UKHP-E RAS-18UKHP-E

MODEL

Cooling HIGH 1350 950 1150 750

and MED 1150 750 1050 650

Fan only LOW 1000 600 900 530

Heating MED 1200 800 1100 700

MODEL

Cooling HIGH 1350 950 1150 750

and MED 1150 750 1050 650

Fan only LOW 1000 600 900 530

Motor speed Air flow level Motor speed Air flow level

(rpm) (m

HIGH 1350 950 1200 800

LOW 1050 650 950 570

RAS-24UKP-E RAS-18UKP-E

RAS-24UKPX RAS-18UKPX

RAS-24UKP-AR RAS-18UKP-AR

RAS-24UKPX-T RAS-18UKPX-T

LOW+=

3

/h) (rpm) (m3/h)

LOW+MED

2

MED+=

MED+HIGH

2

– 25 –

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

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 [START / STOP] 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.

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 on the remote control are controlled
as shown in Fig. 7-2-2.

(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 [START /
STOP] 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.

(Room temp.) – (Preset temp.)

Preset
temp.

+3

+2.5

+2

+1.5

+1

+0.5

0

(Preset temp.: 24°C

M+

*1

*1

*1

L–

NOTE :

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

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

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

(2) ECO operation cannot be set.

ON ON

OFF ON OFF OFF ON

Compressor

4-way valve

Common relay

Outdoor fan

(Room temp.) – (Preset temp.)

Preset
temp.

0.5

0

Fig. 7-2-2

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

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

(Room temp.) – (Preset temp.)

Preset
temp.

+3

+2.5

+2

+1.5

+1

+0.5

0

-0.5

M+

*1

*1

*1

L–

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]

display

OPERATION

– 26 –

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

7-2-3. Dry Operation

(R

)

(

)

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

7-2-4. Heating Operation

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

*Heating and Cooling Model only

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

operation display on the remote control are controlled
as shown in Fig. 7-2-4.

ON:6min.

OFF

ON:5min.

OFF

4-way valve

OFF:4min.

ON

OFF:5min.

Outdoor fan

OPERATION

(Room temp.) – (Preset temp.)

Preset
temp.

+3

+2

+1

ON:6min.

OFF:4min.

ON

ON:5min.

OFF:5min.

OFF

0

Compressor

Common relay

Fig. 7-2-4

(2) The microprocessor turns the compressor on and off

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

Room temp.

Preset temp.+1

Preset temp.

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

operation display on the remote control are controlled
as shown in Fig. 7-2-6.

Preset
temp.

display

0

temp.

Preset

–0.5

–

oom temp.

ON

ON ON

OFF

ON

Compressor

Common relay

4-way valve

Fig. 7-2-6

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

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

Preset

temp.

0

-0.5

-1

-1.5

-2

– (Preset temp.)

L

1

*

2

*

+

M

OFF

ON

Outdoor fan

display

OPERATION

-5.0

-5.5

[FAN AUTO]

(Room temp.)

H

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

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]

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

only.

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

– 27 –

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

(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.

3

*

Manual
(one of 5
steps)

L – H
(Up to
setting
speed)

AUTO

34

46

33

45

21

33

20

32

2

*

A + 4

A – 8

6

*

A + 4
A – 8

*

5

*

4

SUL

SUL*1

Stop

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. 7­2-9. 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.

NOTES :

*1: The fan stops for 2 minutes after thermostat-OFF.

*2: A is 24°C when the preset temperature is 24°C or

more and A is the preset temperature when it is
under 24°C.

*3: SUL means Super Ultra Low.

*4: Calculated from difference in motor speed between

SUL and HIGH.

Fig. 7-2-8 Cold draft preventing control

*5 and *6:

Table 7-2-1

Fan
speed

AUTO

Manual
(L – H)

*5

Starting period

• 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

• Room temperature
<

Preset temperature

*6

Stabilized period

• 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

°C

Cooling operation

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

+4

Cooling operation

0

Fan only operation

–1

Heating operation

(Room temp.) – (Preset temp.)

RAS-24UKHP-E RAS-24UKP-E, 24UKPX
RAS-18UKHP-E RAS-24UKP-AR, 24UKPX-T

RAS-18UKP-E, 18UKPX
RAS-18UKP-AR, 18UKPX-T

Fig. 7-2-9

– 28 –

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

7-3. ECO Mode

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

7-4. Hi POWER Mode

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

When [ECO] button is pressed while the indoor unit is in
Cooling, Heating or Auto operation, ECO mark is
indicated on the display of the remote control and the
unit operates quietly and mildly controlling air flow.

(1) Cooling operation

• The preset temperature is changed automatically
as shown in Fig. 7-3-1.
(The value of the preset temperature on the remote
control does not change.)

• Fan speed → LOW

(˚C)

Preset temp.

is changed

+2

+1

Preset temp.

ECO button

is pressed

Preset temp.

is changed

1H 2H TIME0H

Fig. 7-3-1

(2) Heating operation *Heating and Cooling Model only

• The preset temperature is changed automatically
as shown in Fig. 7-3-2.
(The value of the preset temperature on the remote
control does not change.)

• Fan speed → LOW

ECO button

is pressed

Preset temp.

–

1H 2H TIME0H

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

(1) Automatic operation

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

(2) Cooling operation

• The preset temperature drops 1°C.
(The value of the preset temperature on the remote
control does not change.)

• If the difference between the preset temperature
and the room temperature is big, the horizontal
louver moves to the Hi POWER position
automatically. Then when the difference between
them gets smaller, the horizontal louver returns
automatically.

• FAN speed : [AUTO]
If the difference between the preset temperature
and room temperature is big, the air conditioner
operates at maximum airflow level. If the difference
between the preset temperature and the room
temperature is small, the air conditioner operates
at normal airflow level.

• FAN speed : One of 5 levels
The air conditioner operates at normal airflow level.

(3) Heating operation *Heating and Cooling Model only

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

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

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

only operation.

–1

–2

Preset temp.

is changed

Preset temp.

is changed

(˚C)

Fig. 7-3-2

– 29 –

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

7-5. High-Temperature Limit Control

The microprocessor 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. 7-5-1.

Compressor

OFF

ON

ON

Outdoor fan

OFF

OFF

ON

Heat exchanger
temp.
(°C)

60

55

52

Fig. 7-5-1

7-6. Low-Temperature Limit Control

The microprocessor 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. 7-5-2.

Heat exchanger
temperature

(˚C)

6

2

Compressor

Less than 2˚C continues

Outdoor fan

ON

for 5 minutes

OFF

Fig. 7-5-2

7-7. Defrosting Operation

*Heating and Cooling 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.

– 30 –

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

7-8. 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.

7-8-1. 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.

→

After approx. three seconds,

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

If the unit is not required to operate at this time, push [TEMPORARY]

TEMPORARY button

0

3S

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 green lamp is on.
than three seconds.

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

→

→

After approx. three seconds,

0

3S

The unit beeps three times.

If the unit is required to operate at this time, push [TEMPORARY]

TEMPORARY button

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

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

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

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

– 31 –

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

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

7-8-2. How to Cancel Auto Restart Function

To cancel automatic 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.

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

→

The unit beeps three times The lamp changes from

0

3S

and continues to operate. orange to green.

After approx. three seconds,

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.

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,

The unit beeps three times.

0

3S

TEMPORARY button

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

7-8-3. Power Failure During Timer Operation

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

If the unit is required to operate at this time,

push [TEMPORARY]

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

7-9. Filter Check Lamp

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

7-9-1. How To Turn Off Filter Check Lamp

(1) Press [FILTER] button on the remote control.
(2) 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.

– 32 –

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

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

2

3.5 mm

(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 BY WRONG WAY,

ELECTRIC PARTS MAY BE DAMAGED.

• CHECK THE EARTH WIRE 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, HEAT REGISTORS, FURNACE, STOVES, ETC.

• WHEN MOVING THE AIR-CONDITIONER FOR INSTALLING IT IN ANOTHER PLACE AGAIN, BE VERY CAREFUL NOT TO

GET THE SPECIFIED REFRIGERANT 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, IMME-

DIATELY 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 by by-passing 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.

And make sure the equipment to be 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 may cause a short circuit.

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 user’s 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 instructions for proper

installation.

– 33 –

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

REQUIREMENT OF REPORT TO THE LOCAL POWER SUPPLIER

Please make sure certainly that the installation of this air conditioner will be reported to the local power supplier before installa­tion.
If you have any obscure problems (or if the power supplier does not accept the installation) of this appliance, service agency will
take adequate countermeasures.

Remark per EMC Directive 89/336/EEC

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 supply. 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 has to be connected to this power line.

3. For detailed installation acceptance please contact with your power supplier, it restriction do 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.

– 34 –

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

8-2. Installation Diagram of Indoor and Outdoor Units

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

Hook

170 mm

or more

(Attach to the front panel) (Attach to the air filter)

Air filter

65 mm or more

Hook

1 Installation

plate

170 mm

or more

Shield pipe

For the rear left and left piping

Insert the cushion between
the indoor unit and wall,
and lift indoor unit to make
work easier.

Do not allow the drain hose to
get slack.

Wall

Before install the wireless
remote control

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

2 Wireless remote control

3

Batteries

100 mm or more

100 mm

or more

600 mm or more

600 mm or more

7 Purifying filter

6 Zeo lite filter

Cover

Extension drain hose
(Option:RB–821SW)

Electric
parts
cover

600 mm

or more

5 Filter frame

2 Wireless remote

control

100 mm

or more

600 mm or more

Pan head
wood screw

9

4 Remote control holder

Vinyl tape
Apply after
carrying out a
drainage test.

Saddle

100 mm or more

600 mm or more

Extension drain hose
(Option:RB–821SW)

Electric
parts
cover

600 mm

or more

Cut the piping hole
sloped slightly

Make sure to run the drain
hose sloped downward.

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

Right

Rear

Bottom

Rear left

Left

Insulate the refrigerant pipes
separately with insulation, not
together.

18 Class

24 Class

Loop the connective cable
(about 100 mm in diameter and 300 – 350 mm long).

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

6 mm thick heat resisting
polyethylene foam

Loop the connective cable
(about 100 mm in diameter and 300 – 350 mm long).

– 35 –

8-3. Installation

8-3-1. Optional Installation Parts

Part

Code

Parts name

Refrigerant piping
Liquid side : Ø6.35 mm

A

Gas side : Ø12.7 (RAS-18UK)

Q'ty

Each

one

: Ø15.88 (RAS-24UK)

Pipe insulating material

B

(polyethylene foam, 6 mm thick)

C

Putty, PVC tapes

1

Each

one

<Fixing bolt arrangement of outdoor unit>

RAS-18UAH-E/RAS-18UA-E/RAS-18UAX/RAS-18UA-AR/RAS-18UAX-T

600 mm

Air inlet

120 mm

Air outlet

325 mm

52 mm

Air outlet

Fig. 8-3-1

RAS-24UAH-E/RAS-24UA-E/RAS-24UAX/RAS-24UA-AR/RAS-24UAX-T

600 mm

Air inlet

120 mm

64 mm

340 mm

Air outlet

Drain outlet

Fig. 8-3-2

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

• Use Ø8 mm or Ø10 mm anchor bolts and nuts.

• If it is necessary to drain the defrost water, attach ! drain nipple to the bottom plate of the outdoor unit before installing it.

– 36 –

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

8-3-2. Accessory and Installation Parts

Part

No.

Part name (Q'ty)

1

Installation plate x 1

2

Wireless remote control x 1

3

Battery x 2

Others

The part marked with asterisk (*) is packaged with the outdoor unit.
This model is not equipped with an extention drain hose.

Option :

For the extention drain hose, use an optionally available RB-821SW or commercially available one.

Name

Owner's manual

Installation manual

Part

No.

Part name (Q'ty)

4

Remote control holder x 1

5

Filter frame x 2

6

Zeo lite filter x 2

Part

No.

7

Purifying filter x 2

8

Mounting screw Ø4 x 25 s x 8

9

Pan head wood screw Ø3.1 x 16 s x 2

!

Drain nipple* x 1

Part name (Q'ty)

– 37 –

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

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 which allows an easy installation of the
piping to the outdoor unit.

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

8-4-2. Cutting a Hole and Mounting Installation

Plate

<Cutting a Hole>

When install the refrigerant pipes from the rear.

CAUTION

• Direct sunlight to the indoor unit wireless receiver should be
avoided.

• The microprocessor in the indoor unit should not be too
close to r-f noise sources.
(For details, see the owner's manual.)

<Remote Control>

• 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.

(Top view)

Remote
control

Indoor unit

* : Axial distance

5 m

Reception
range

45°

45°

5 m

Remote
control

Indoor unit

75°

(Side view)

7 m

Reception
range

Pipe
hole

65 mm

The center of the pipe
hole is above the arrow.

100

Fig. 8-4-2

1. After determining the pipe hole position on the
mounting plate (100 mm A), drill the pipe hole
(Ø65 mm) at a slight downward slant to the outdoor
side.

NOTE:

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

<Mounting the Installation Plate>

For installation of the indoor unit, use the paper pattern

* 7 m

on the back.

Hook

55

65

Fig. 8-4-1

Pipe hole

– 38 –

170

120

Indoor unit

Hook

Thread

Fig. 8-4-3

Hook

8 Mounting screw

Weight

Pipe hole

1

Installation
plate

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

<When the installation plate is directly mounted on
the wall>

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 above.

3. Install the installation plate horizontally in the wall.

CAUTION

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

Anchor
bolt

Projection

5 mm dia. hole

15 mm or less

8Mounting

screw
ø4 x 25 s

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 mm2 (H07RN-F or 245
IEC66) or 1.3 mm2 (AWG-16)

CAUTION

• Use power specified above table.

• This appliance can be connected to the mains in
either of the following two ways.
(1)Connection to fixed wiring :

A switch or circuit breaker which disconnects all
poles and has a contact separation of at least 3
mm must be 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.

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 8 mounting
screws.

NOTE:

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

– 39 –

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

8-4-4. Wiring Connection

Air Inlet grille

2

1

Front panel

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 limitation.

Connecting cable

Terminal block

Terminal
cover

Screw

Cord clamp

Screw

Earth line

Connecting
cable

Fig. 8-4-5

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

without removing of the front panel.

1. Remove the air inlet grille.
Open the air inlet grille upward and pull it toward
you.

2. Remove the terminal cover and cord clamp.

3. Insert the connecting cable (according to local
cords) into pipe hole on the wall.

4. Take out the connecting cable through the cable
slot on the rear panel so that it is exploded by
about 15 cm long in the front side.

5. Insert the connecting cable fully into the terminal
block and secure it by screw tightly.

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

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.

about 15 cm

Fig. 8-4-6

<Stripping length of connecting cable>

10 mm

10 mm

NOTE:

Use stranded wire only.

50 mm

40 mm

• Wire type : More
than 1.5 mm

2

(H07RN-F or 245
IEC66) or 1.3 mm
(AWG-16)

Earth line

Fig. 8-4-7

NOTE:

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

Fig. 8-4-8

<How to install the air inlet grille on the indoor
unit>

• When attaching the air inlet grille, the contrary of
removed operation is performed.

2

Fig. 8-4-9

– 40 –

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

8-4-5. Piping and Drain Hose Installation

To connect pipe after installation of unit (figure)

<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

<In case of downward 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.

(To the forefront of flare)

400 mm

300 mm

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

43 mm

80˚

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 auxillary pipes
and wrap the facing tape around them.

CAUTION

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

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 spring bender so as
not to crush the pipe.

Bend the connection pipe within a radius of 30 mm.

Indoor unit

Auxiliary pipes

Installation plate

Connecting
cable

Drain hose

• 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.

– 41 –

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

8-4-6. Indoor Unit Fixing

8-4-7. Drainage

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.

1

2

Hook

Hook here

1 Installation plate

Press

(unhook)

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.

1. Run the drain hose sloping downwards.

NOTE:

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

Do not rise the drain hose.

50 mm
or more

Do not put the
drain hose end
into water.

Do not form the drain hose into the
waved 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.

Shield pipe

Push

Fig. 8-4-14

Push

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

Fig. 8-4-17

– 42 –

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

8-5. Outdoor Unit

8-5-2. Refrigerant Piping Connection

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 REFRIGER-
ANT for detail.)

• An allowable height level is up to 8 m. (RAS-18UA)
or 10 m. (RAS-24UA).

• 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 such places.

• A place full of machine oil.

• A saline-place such as 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.

1. Cut the pipe with a pipe cutter.

90°

Obliquity

Roughness

Warp

Fig. 8-5-2

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

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

A

Die

Pipe

Fig. 8-5-3

Outer dia. Of copper pipe

6.35

12.7

15.88

Rigid

1.0 to 1.5

1.0 to 1.5

1.0 to 1.5

A

Imperial

1.5 to 2.0

2.0 to 2.5

2.0 to 2.5

<Tightening Connection>

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

Otherwise, the nut may crack depending on the conditions.

• Do not apply excess torque.

Strong
wind

Fig. 8-5-1

– 43 –

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

(Unit : N•m)

Outer dia. Of copper pipe

Ø6.35 mm

Ø12.7 mm

Ø15.88 mm

Tightening torque

16 to 18 (1.6 to 1.8 kgf•m)

50 to 62 (5.0 to 6.2 kgf•m)

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

Half union

Externally
threaded side

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

Flare nut

Internally
threaded side

Fig. 8-5-5

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 vacuum pump. Do not use
the refrigerant in the outdoor unit. For details,
see the manual of vacuum pump.

<Use a 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

Pressure gauge

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)

-101kPa (-76cmHg)

Handle Lo

Charge hose

Connecting pipe

Manifold valve

Handle Hi
(Keep full closed)

Charge hose

Vacuum pump
adapter for
counter-flow
prevention

Vacuum
pump

Packed valve at gas side

Service port (Valve core (Setting pin))

Packed valve at liquid side

Fig. 8-5-6

– 44 –

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

TO CHARGE REFRIGERANT

RAS-24UKHP-E/24UAH-E

RAS-24UKP-E/24UA-E

RAS-24UKPX/24UAX

RAS-24UKP-AR/24UA-AR

RAS-24UKPX-T/24UAX-T

15 m or less

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

Refrigerant

No need to charge refrigerant

Need to charge refrigerant

RAS-18UKHP-E/18UAH-E

RAS-18UKP-E/18UA-E

RAS-18UKPX/18UAX
RAS-18UKP-AR/18UA-AR
RAS-18UKPX-T/18UAX-T

15 m or less

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

<Packed Valve Handling Precautions>

• 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

Gas side
(Ø15.88 mm)

Gas side
(Ø12.7 mm)

Liquid side
(Ø6.35 mm)

Service port

• Hexagonel wrench : A (Unit : mm)

Tightening torque

65 to 80 N•m
(6.5 to 8.0 kgf•m)

60 to 62 N•m
(6.0 to 6.2 kgf•m)

16 to 18 N•m
(1.6 to 1.8 kgf•m)

9 to 10 N•m
(0.9 to 1.0 kgf•m)

Hexagonal wrench
is required.

A

5 mm

4 mm

Same as
Gas side

A

8-5-4. Wiring Connection

1. Remove the electric parts 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 installation
diagram of indoor and outdoor unit, to prevent water
coming in the outdoor unit.

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

<Stripping length of connection cable>

LNL

Earth line

Cord
clamp

10

60

N

L N

Terminal block

Screw

10

70

2

1

Power
supply
cord

60

Terminal block

3

10

Earth line

Screw

Cord
clamp

Connecting cable

1 2 3

10

70

Fig. 8-5-7

Power
supply
cord

Earth line

Connecting cable

Fig. 8-5-8

Model

Power source
Maximum running

current
Plug socket &

fuse rating

Power cord

RAS-18UKHP-E/

RAS-18UKP-E/
RAS-18UKPX/

RAS-18UKP-AR

50 Hz, 220 – 240V Single phase

16A

20A

• 4 mm2 (H07RN-F or 245 IEC 66)
or 3.5 mm2 (AWG-12)

RAS-24UKHP-E/

RAS-24UKP-E/
RAS-24UKPX/

RAS-24UKP-AR

18A

20A

RAS-18UKPX-T

50 Hz, 220V Single phase

16A

20A

RAS-24UKPX-T

18A

20A

CAUTION

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

• Be sure to comply with local codes on running the
wire from outdoor unit to indoor 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)

– 45 –

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

8-6. Others

8-6-3. Auto Restart Setting

8-6-1. Gas Leak Test

Electric parts
cover

Flare nut connections
(Outdoor unit)

D

B

Valve stem cap
connection

C

Flare nut connections
(indoor unit)

Valve stem cap
connection

A

Service cap
connection

Fig. 8-6-1

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

8-6-2. Test Operation

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

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.

<How to Set the Auto Restart>

• Press and hold down 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.

TEMPORARY button

Fig. 8-6-2

– 46 –

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

9. TROUBLESHOOTING CHART

9-1. Troubleshooting Procedure:

Follow the details of 9-2. Basic Check Items.
If there is no trouble corresponding to 9-2, check whether
or not there are faulty parts following 9-4. Self-

Diagnosis by Remote Control.

9-2. Basic Check Items

9-2.1 Power Supply Voltage

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

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.

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.

9-2-2. Incorrect Cable Connection between Indoor

and Outdoor Units

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

9-2-3. Program Control

The microcomputer 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.

The OPERATION lamp blinks to indicate that power is turned
on. If the [START/STOP] button is pressed, the lamp stops
blinking. The lamp also blinks when the power supply is turned
off.

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.

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 (3­minutes 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 detacted
every 15 minutes and the operation mode is changed
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 microcomputer
gives commands to change the preset temperature and air
flow level.

– 47 –

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

9-3. Primary Judgment

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 exhcnager 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

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.

Lamps

A OPERATION lamp is blinking. (1Hz)

B OPERATION lamp is blinking. (5Hz)

C OPERATION lamp is blinking. (5Hz)

D OPERATION lamp is blinking. (5Hz)

E OPERATION lamp is blinking. (5Hz)

F OPERATION and TIMER lamps are blinking.

(5Hz)

G OPERATION, TIMER and PRE-DEF. (or FAN

ONLY for cooling only model) lamps are
blinking.

H 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

Self-diagnosis

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

• Gas shortage or other refrigerant cycle trouble

• Heat exchanger sensor open, break or short

• Overload relay or thermostat trouble of compressor

Cycle failure

Primary judgement

The remote control
does not work.

The outdoor fan does
not rotate.

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

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

The compressor operates.

The compressor does not operate.

– 48 –

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 is defective.

9-4. Self-Diagnosis by Remote Control

(Check Code)

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

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

9-4-1. How to use Remote Control in Service Mode

SET CLR

CLOCK CHECKRESET

WH-C1PE

PRESET

START/STOP

FAN MODE

SWING

SET

ON

OFF SET CLR

FILTER

WC-C1PE

• Alphanumeric characters are used for the check code.

is 5. is 6.
is A. is B.
is C. is D.

SLEEP

TIMER

Hi-POWER

ECO

MEMO

CLOCK CHECKRESET

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

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

10 seconds (Pi, Pi, Pi....). The timer lamp usually

blinks (5Hz) during the self-diagnosis.

(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:

; 00 ; 01 ; 02 ··· 1d ; 1E ; 22

• 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 for 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.)

* This illustration is only for RAS-24UKP model and
RAS-18UKP model.

– 49 –

(3) Press [START/STOP] button to release the service

mode.

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

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

Table 9-4-1

Block level

Check

code

00

01

02

03

Block

Indoor P.C.

board

The block is

unidentifiable

Cable

connection

Outdoor

P.C. board

Other parts

(including

compressor)

Check

code

0C

0d

11

12

21

13

04

05

18

19

07

1E

20

Diagnosis function

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 variation of TC, 5 minutes after
starting the compressor, is 2K or
less.

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 status

Operation
continues.

Operation
continues.

All off

Operation
continues.

All off

Operation
continues.

Operation
continues.

Operation
continues.

All off

All off

Operation
continues.

All off

All off

– 50 –

Condition

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

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

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

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

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

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

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.

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.

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. Check whether or not the TC sensor comes
off.

2. Check whether or not it is possible to operate
the compressor and the outdoor fan motor.

3. Check gas leak.

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.

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

9-5. How To Diagnose Faulty Parts

Operation

Check item

Conceivable principle cause

[04 Serial signal error]

Does outdoor

unit operate?

YES

NO

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

NO

NO

NO

NO

Outdoor P.C. board

is defective.

Measure

Item by symptoms

Connect crossover
wires properly.

Connect connector
properly.

Replace
P.C. board.

[08 Four-way valve error]

Does four-way valve

operate properly?

YES

Is TC sensor resistance

value (10k at 25°C)

normal?

NO

NO

YES

Does coil terminal

have 220 – 240 V

in heating operation?

NO

Are circuit

wires normal?

YES

Is outdoor P.C. board

normal?

YES

YES

NO

NO

Indoor P.C. board

is defective.

Four-way valve

is defective.

Outdoor P.C. board

is defective.

(CN11 220 – 240V)

Indoor P.C. board

is defective.

Replace

P.C. board.

Replace

Four-way valve

Circuit check/modification

Replace
P.C. board.

Replace
P.C. board.

Replace TC sensor.

– 51 –

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

[09 Other cycle error] (1)

NO

Replace TC

sensor.

YES

Connect TC

sensor properly.

Does compressor

operate?

YES

Is compressor

turned off shortly?

NO

Is TC sensor resistance

value (10k at 25°C)

normal?

YES

Is TC sensor

disconnected from

the sensing element?

NO

NO

YES

Does inner

overload relay (in

compressor)

operate?

NO

Is circuit wiring

normal?

YES

Is outdoor P.C.
board normal?

YES

YES

NO

NO

Check charged amount of refrigerant.
Check defective overload.
Check compressor.

Failure

Wiring check/modification

Outdoor P.C. board

is defective.

Indoor P.C. board

is defective.

Replace

compressor.

Replace

P.C. board.

Replace

P.C. board.

[09 Other cycle error] (2)

NO

Connect

connector

properly.

NO

Replace

condenser.

NO

Replace
fan motor.

Is connector

connected properly?

Is condenser

Is indoor fan

motor normal?

YES

normal?

YES

YES

NO

Does indoor fan

operate?

Are filters clogged?

Is TC sensor resis-

tance value (10k at

25°C) normal?

Is charged amount

of refrigerant normal?

Is outside air

low load?

YES

NO

YES

YES

NO

YES

NO

NO

Anti-freezing operation

YES

Anti-freezing operation

Clean filters.

Replace
TC sensor.

Charge

refrigerant

.

Indoor P.C. board is defective.

– 52 –

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

Replacd

P.C. board.

[0C Indoor TA sensor error]

Is CN04 (TA sensor connector)

connected properly?

YES

Is TA sensor resistance value

(10 k at 25°C) normal?

YES

[0d Indoor TC sensor error]

Is CN05 (TC sensor connector)

connected properly?

YES

NO

NO

NO

Indoor P.C. board is defective.

Connect CN04
properly.

Replace
TA sensor.

Replace
P.C. board.

Connect CN05
properly.

Is TC sensor resistance value

(10 k at 25°C) normal?

YES

[18 outdoor TE sensor error]

Is TE sensor connector

connected properly?

YES

Is TE sensor resistance value

(10 k at 25°C) normal?

YES

NO

NO

NO

Indoor P.C. board is defective.

Replace
TC sensor.

Replace
P.C. board.

Connect connector
properly.

Replace
TE sensor.

Indoor P.C. board is defective.

– 53 –

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

Replace
P.C. board.

[19 outdoor TD sensor error]

Is TD sensor

connected properly?

YES

Is TD sensor resistance value

(50 k at 25°C) normal?

YES

[1E Discharge temp. error]

NO

NO

Indoor P.C. board is defective.

Connect connector
properly.

Replace TD
sensor.

Replace
P.C. board.

controller such as discharge

Is protective

thermostat normal?

YES

Is charged amount

of refrigerant normal?

YES

Is overload relay normal?

NO

Is TD sensor resistance

value (50 k at 25°C)

normal?

YES

NO

NO

YES

NO

Are wires connected

to connector properly?

Outdoor P.C.board is defective.

NO

Connect wires to
connector properly.

Check and modify charged
amount of refrigerant.

Unit operates normally.

Replace TD sensor.

Replace P.C. board.

– 54 –

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

9-6. Troubleshooting for Indoor unit

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

<Primary check>

(1) Is the supply voltage normal?
(2) Is the connection to the AC output OK?
(3) Are the connection of the primary side and the secondary side

of the power transformer inserted into the P.C. board?

(4) Is the fuse (F01) blown?

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

Is OPERATION

NO

lamp blinking?

YES

Does
transmission
mark on
remote control
flash normally,
and is its
signal
transmitted
properly?

YES

Does the fan
motor
connector
between 1
and 2 short­circuit?

Microcomputer is
defective.

Is DC 310 –
340V
supplied to
primary side
of transfer
switch?

YES

NO

Is fuse (F01)
of indoor
control board
blown?

Is voltage
(DC 12V or
5V) indicated

NO

on rear of
indoor
control board
normal?

Refer to
<Primary check>
or this problem is
one step short of
power P.C. board
block.

Is it possible to
turn on power
supply by
pressing
[START/STOP]
button on
remote control?

NO

YES

YES

NO

YES

Parts (R21,
R22, SG01,
C15, C01,
DB01, C02,
IC01 and T01)
are defective.

NO

Operation

Check item

Conceivable principle cause

Measure

Item by symptoms

Remote control is
defective.

Refer to 9-9
“Troubleshooting for
Remote Control.”

Unit operates
normally.

YES

NO

Replace main P.C.
board.

Are DC 15V,
DC 12V and
DC 7V
supplied to
secondary
side of
transfer
switch?

YES

Are DC 15V,

NO

Turn off breaker
once and turn it
on again after
removing motor.

DC 12V or
DC 7V
supplied to
secondary
side of
transfer
switch?

NO

Transfer switch,
IC (IC01) for
power supply
or fan motor is
defective.

YES

– 55 –

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

Replace motor.

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

<Primary check>

(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.)

Turn off power
supply once, and
turn it on again.

Does
compressor
continue to
operate?

NO

Start to operate
indoor unit in
cooling operation
at airflow level
“LOW”.

Does indoor fan
operate?

YES

Change airflow
level to “High”.

Is it possible to
change airflow
level to “High”?

YES

YES

NO

Is it possible to detect DC 1V
or more between 5

of motor connector

3

(CN10).

Is it possible to detect DC
310 – 340V between 1

of motor connector

3

(CN10).

(Motor connection condition)
Is it possible to detect DC 15V
between 4
motor connector (CN10).

Start to operate the indoor
unit in except heating
operation. At this time, is it
possible to detect DC 1V or
more between 5
of motor connector (CN10)?

NO

Is it possible to rotate cross­flow fan by hand properly?

and

YES

YES

and 3 of

YES

and 3

and

NO

NO

Turn off indoor unit and
remove connector from
motor.
Then press
START/STOP button on

NO

remote control to stop
blinking lamp on indoor
unit.

Is it possible to detect DC
15V between 4

of motor connector

3

NO

(CN10).

Turn off indoor unit and
remove connector from
motor.

NO

Then start to operate
indoor unit with remote
control.

and

NO

Replace indoor
fan motor.

Replace main
P.C. board.

Fan motor
operates normally.

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

Turn off indoor unit and rotate
cross-flow fan by hand when
the unit is on standby. At this
time, is it possible to detect
DC 1V or more between 5
and 3 of motor connector
(CN10).

YES

NO

– 56 –

Start to operate the indoor
unit in except heating
operation. At this time, is it
possible to detect DC 1V
or more between 5
and 3 of motor
connector (CN10)?
(Check this condition
within 15 seconds after
starting unit.)

YES

NO

Replace bearing.

9-6-3. Indoor fan motor automatically starts to rotate by turning on power supply.

<Cause>

The IC is built in the indoor fan motor. Therefore the P.C. board is also mounted to the inside of the motor.
If the P.C. board is soldered imperfectly or the IC is defective, the fan motor may automatically rotate by turning
on power supply.

<Inspection procedure>

(1) Remove the front panel. (Remove 4 screws.)
(2) Remove the cover of the fan motor lead wires.
(3) Check DC voltage with CN10 connector while the fan motor is rotating.

NOTE:

• Do not disconnect the connector while the fan motor is rotating.

• Use a thin test rod.

Indoor fan starts rotating when power supply is turned on.

(Check output DC voltage of fan motor on P.C. board.)

Measure voltage between 2 (GND:BLACK) and 3 (V
line:YELLOW) of motor connector (CN10) while indoor fan
motor is rotating.

DC 1.0V or more

P.C. board is defective.

Replace P.C. board. Replace motor.

Under DC 1.0V

Motor is defective.

Yellow

Black

DC

CN10

P.C. board

B

6 (Blue)

5 (Yellow)

4 (White)

3 (Black)
2 –

1 (Red)

– 57 –

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

9-6-4. 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?

<Inspection procedure>

-Cooling only model-

Turn on power supply.

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?

YES

NO

NO

NO

Is resistance value of thermo
sensor (TA) and heat
exchanger sensor (TC)
normal?

YES

Microcomputer is
defective.

Miniature relay RY04 is
defective.

NO

NO

NO

Compressor is defective.

Capacitor is defective.

NO

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.

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.

NO

NO

NO

Overload relay is defective.

Compressor is defective.

Gas shortage (Gas leak)

– 58 –

Replace overload relay.

Replace compressor.

Supply gas.

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

<Inspection procedure>

-Cooling and heating model-

Turn on power supply.

Does OPERATION
lamp blink?

YES

Is it possible to start
unit by remote
control?

YES

Is it possible to detect DC
15 – 60V between 2 and
3 on terminal block?

YES

Is crossover cable normal?

YES

Is it possible to detect AC
12V on secondary side
(CN06) of transfer?

YES

Is it possible to detect DC
5V at Q60 and 12V at Q50?

YES

All lamps on indoor unit
normal?

YES

NO

NO

NO

NO

NO

NO

Refer to item “Power

can not be turned on”.

Refer to 9-9 “Troubleshoot-

ing for Remote Control”.

Check TA and TC sensors or

refer to “01 – 04” in Table 9-4-1.

Connect crossover

cable properly.

Replace transfer.

Replace outdoor P.C.

board.

Refer to 9-8-3 “How to check

outdoor P.C. board.”

Are TD and TE sensors normal?

(TD=17.9k at 50°C)

(TE=10k at 25°C)

YES

Is it possible to detect AC
220 – 240V at CN11?

YES

Does MG switch operate?

(Next Page)

NO

NO

NO

Replace sensors.

Replace outdoor P.C.

board.

Replace MG switch.

– 59 –

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

YES

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

NO

NO

NO

NO

NO

NO

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 P.C. board.

– 60 –

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

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 2 and 3 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.

• Prepare a diode for checking.

Terminal block on indoor side

Red

3

S5277G

White

2

1

Terminal block

Tester

Normal condition : Voltage varied between DC15V and 60V.
Abnormal condition : Voltage does not vary.

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

S5277G or equivalent (G or J type)
(Diode with rated voltage of 400V
or more is acceptable.)

Fig. 9-7-1

<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.

Gas shortage

Gas leak

Pipe clogging

Measure gas pressure.

Compressor is turned off and on automatically by thermo sensor
(Heating and Cooling Model) or thermostat (Cooling only Model).

(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.)

– 61 –

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

9-8. Troubleshooting for P.C. board

<Inspection procedure>

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

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

tion, burn or discoloration of the copper foil pattern
of the 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

(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

lead wires.

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

Table 9-8-1 Inspection procedure

No. Procedure Check points Causes

1 Turn off the power supply and

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

2 Remove the connector of the motor and

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

3 Press [START/STOP] button once to

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

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

Check power supply voltage;

1. Between TP2 and TP3 of CN12
(220 – 240V AC)

2. Between + and – of CN02
(DC310 – 340V)

3. Between C04 and output side
of IC09 (DC15V)

4. Between 12V and GND

5. Between 5V and GND

Check power supply voltage;
<Heating and cooling model>

1. Between CN31 and CN23
(DC15 – 60V)

<Cooling only model>

1. Between connector of Q33 and GND
(for relay coil (DC12V))

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

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 C15), line
filter (L01), resistor (R01), or the
diode (DB01) is defective.

3. IC01, IC02 and T1 are defective.

4. IC01, IC02, and T1 are defective.

5. IC01, IC02, IC07 and T01 are
defective.

<Heating and cooling model.>
IC05 and IC06 are defective.

<Cooling only model>

1. The wire of the relay coil (RY04)
comes down or the relay drive
(Q33) is defective.

2. CN27 or RY04 is connected
wrongly.

4 Shorten the line of the restart delay

timer and start unit.

Check whether or not all lamps
(OPERATION, TIMER, PRE.-DEF.
(or FAN ONLY), ECO and AUTO)
are indicated for 3 seconds and

– 62 –

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

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

No. Procedure Check points Causes

5 Press [START/STOP] 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

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.

condition.)

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.

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 high.

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

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

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

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

1. Check it is impossible to detect the

voltage (DC 15V) between 3 and 4
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 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.

condition.)

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

Temperature 0°C10°C20°C25°C30°C

Resistance value 35.8 20.7 12.6 10.0 7.92

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

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

with a tip of a pencil.

2 Then press [START/STOP] button ot transmit the

signal to the indoor unit.

START/STOP

FAN MODE

SWING

SLEEP

TIMER

SET

ON

OFF SET CLR

FILTER

WH-C1PE

PRESET

Hi-POWER

ECO

MEMO

CLOCK CHECKRESET

2

1

(k )

– 63 –

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

9-8-3. How to check outdoor P.C. board

When the check code is detected on the outdoor unit, the following lamps are indicated on the LED display and
the Dip switch (DSW01).

Table 9-8-3 LED display and check code

Dip LED

switch 1 Red 2 Yellow 3 Yellow 4 Yellow

Table 1

ON

12

Timer short

20 Power line

protective circuit

1E Heat exchanger

sensor (TD) temp.
rise protection

21 IOL operation circuit

ON

Table 2

12

18 Thermo sensor (TE)

circuit

19 Heat exchanger

sensor (TD) circuit

Protective operation frequency
for sensor circuit error

• When the lamps (1 to 4) on the LED are indicated in order, the phase detecting protection circuit operates
regardless of the Dip switch setting.

ON

12

1

LED

RB03

10X

R93 R92

2

D23

18

D40

D24

D20

D25

D22

D26

R91

CN28

R90

CN18

22

1

2

3

D10

D41

D42

D43

CN29

D08
D09

D07

007

R23

CN17

CN19

8

R22

SW01

D44

D45

D46

D47

CN16

8

Q60

8

R64

R65

008

Fig. 9-8-1 Dip switch and LED

Indication exchange
Dip switch (SW01)

+5V

C

D04 Orange

C64

Serial receiving LED

D05 Green
Serial transmitting LED

Schematic Diagram of
Outdoor Control Board

Table 9-8-4

Dip switch

ON

12

ON

12

LED

1 2 3 4

As

follows

Normal operation

Timer short operation

20 Power line protective circuit

1E Heat exchanger sensor (TD) temperature rise protection

21 IOL operation

18 Thermo sensor (TE) circuit

19 Heat exchanger sensor (TD) circuit

Normal operation

Protective operation : Once

Protective operation : Twice

Protective operation : Three times

Protective operation : Four times (Emergency stop)

18 Thermo sensor (TE) circuit

19 Heat exchanger sensor (TD) circuit

1E Heat exchanger sensor (TD) temperature rise protection

21 IOL operation

Check contents

All off

All off

LED status

:

The lamp is indicated.

: T

he lamp blinks fast.

:

The lamp blinks slow.

:

The lamp is not indicated.

– 64 –

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

9-8-4. P.C. Board Layout

Top View

Bottom View

– 65 –

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

9-9. Troubleshooting for Remote Control

Is receiver on indoor
unit exposed to direct
sunlight?

YES

YES

NO

Is there any thyristor
fluorescent light
nearby?

YES

NO

Press START/STOP
button.

Is transmission mark
indicated?

Does indoor unit
operate when moving

NO

remote control near
receiver or indoor
unit?

Batteries are

exhausted.

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

NO

Press RESET button
on remote control
with tip of pencil.

Press START/STOP
button.

YES

Avoid direct
sunlight.

NO

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?

YES

P.C. board is defective.

Replace P.C. board.

Is transmission mark
indicated?

NO

Does indoor unit
beep and operate?

NO

Replace batteries.

Note : After replacing batteries,

press the RESET button
with a tip of a pencil.

YES

YES

Normal operation

NO

Remote control is

defective.

Replace
remote control.

– 66 –

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

10. PART REPLACEMENT

10-1. Indoor Unit

No. Part name Procedures Remarks

1 Front panel

2

Electrical part
assembly

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 4
screws fixing the front panel.

3) Remove upper 3 hooks of the front panel from the back
body.

4) Open the horizontal grille right below by hand.

5) 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.

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.

(2)

4-screws

(4)

(3) Drain Guide

(2)

(2)

(3)

(5) Screw

5P
6P

(2) Screw

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

– 67 –

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

(6) TC sensor

No. Part name Procedure Remark

Horizontal grille

3

4

Heat exchanger

5

Cross flow fan

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

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

3) Remove the horizontal grille from the back body.

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

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

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

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

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

4.

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

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

4) Pull the cross flow fan toward you.

(2) Screw

Bearing base

(3) Screws

(1) Center shafts

(2) Left shafts

Pipe holder

(3) 2 screws

(2) Set screw

(4) 2
screws

6

7

Bearing base

Fan motor

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.

– 68 –

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 4 mm.

Bearing base

Bearing

(4)

(3) 2 screws

(4) BODY (R)

Motor fixture

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

10-2. Outdoor Unit (Heat pump: RAS-24UAH-E)

(Cooling: RAS-24UA-E, RAS-24UAX, RAS-24UA-AR, RAS-24UAX-T)

No. Part name Procedures Remarks

Common

1

procedure

Running capacitor

2

for compressor

Running capacitor

3

for fan motor
Magnet switch

4

Transformer

5

(Heat pump only)

P.C. board

6

(Heat pump only)

Spark killer

7

(Cooling only)

Bimetal thermostat

8

(Cooling only)

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

2) Remove the electrical parts cover.
(4 screws 4 x 10)

3) Remove the side cabinet (front).
(2 screws 4 x 10)

4) Disconnect the connecting cables after removing 7
screws on the terminal block.

5) Remove the side cabinet (back).
(10 screws 4 x 10)

1) Remove the capacitor band. (1 screw)

2) Disconnect the lead wires from the capacitor terminal.

1) Remove the capacitor band. (1 screw)

2) Disconnect the lead wires from the capacitor terminal.

1) Remove the relay. (2 screws)

2) Disconnect the lead wire from the terminal.

1) Remove the transformer. (2 screws)

2) Disconnect the housing from the P.C. board.

1) Disconnect the lead wire from the P.C. board.

2) Remove the P.C. board after unhooking 4 clamps.

1) Remove the spark killer. (1 screw)

2) Disconnect the lead wire from the terminal block.

1) Remove the running capacitor with procedure 2.

2) Remove the terminal cover of the compressor.

3) Remove the thermostat holder from the compressor.

4) Disconnect the lead wires from the bimetal thermostat.

Top Cabinet

Side Cabinet
(Front)

P.C. Board

Magnet switch

Transformer

Electrical
Parts Cover

Side Cabinet
(Back)

Running Capacitor
for Fan Motor

– 69 –

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

10-3. Outdoor Unit (Heat pump: RAS-18UAH-E)

(Cooling: RAS-18UA-E, RAS-18UAX, RAS-18UA-AR, RAS-18UAX-T)

No. Part name Procedures Remarks

Common

1

procedure

Running capacitor

2

for compressor

Running capacitor

3

for fan motor

Relay

4

Transformer

5

(Heat pump only)

P.C. board

6

(Heat pump only)

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

2) Remove the electrical parts cover. (4 screws)

3) Remove the cord clamps. (4 screws)

4) Remove the connecting cables after removing 7 screws
on the terminal block.

5) Remove the front cabinet. (8 screws)

• Pull the front lower portion toward you and pull out it

upward to remove it.

6) Remove the back cabinet and side cabinet. (12 screws)

1) Remove the capacitor band. (1 screw)

2) Disconnect the lead wires from the capacitor terminal.

1) Remove the capacitor band. (1 screw)

2) Disconnect the lead wires from the capacitor terminal.

1) Unlatch the relay and pull it upward.

2) Disconnect the lead wires from the relay terminal.

1) Remove the transformer. (2 screws)

2) Disconnect the housing from the P.C. board.

1) Disconnect the lead wires from the P.C. board.

2) Remove the P.C. board after unhooking 4 clamps.

Electrical Parts
Cover

Front Cabinet

Side Cabinet

Running Capacitor
for Compressor

Running Capacitor
for Fan Motor

Spark killer

7

(Cooling only)

Bimetal thermostat

8

(Cooling only)

1) Remove the spark killer. (1 screw)

2) Disconnect the lead wire from the terminal block.

1) Remove the running capacitor with procedure 2.

2) Remove the terminal cover of the compressor.

3) Remove the thermostat holder from the compressor.

4) Disconnect the lead wire from the bimetal thermostat.

P.C. Board

Relay

Transformer

– 70 –

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

11-1. Indoor Unit (1)
RAS-24UKHP-E-E-P
RAS-24UKP-E-E-P
RAS-18UKHP-E-E-P
RAS-18UKP-E-E-P

11. EXPLODED VIEWS AND PARTS LIST

Location

No. No.

402 43T60002 Terminal Block, 3P

403 43T69004 Sensor, Heat Exchanger

404 43T69005 Sensor, Thermostat

Part

Description

3P AC300V, 20A

10k , 25°C

10k , 25°C

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

– 71 –

Location

No. No.

405 43T69066 P.C. Board ASSY, WRS-LED

406 43T69064 P.C. Board ASSY

407 43T69065 P.C. Board ASSY

408 43T62003 Clamp, Cord

Part

Description

MCC-819

MCC-821

MCC-821

11-2. Indoor Unit
RAS-24UKHP-E
RAS-24UKP-E
RAS-24UKPX
RAS-24UKP-AR
RAS-24UKPX-T

234

231, 232

233

Location

No. No.

201 43T00048 Front Panel, ASSY

202 43T00049 Grille ASSY

203 43T00050 Grille ASSY

204 43T80014 Air Filter (L)

205 43T80013 Air Filter (R)

206 43T80003 Filter, Frame

207 43T01004 Mark

208 43T03010 Body, Right

209 43T03011 Body, Left

210 43T03012 Hide, Claw

211 43T09036 Grille, Horizontal

212 43T70301 Hose ASSY, Drain

213 43T21029 Motor, Stepping

214 43T44310 Refrigeration Cycle Assembly

215 43T47311 Pipe, Deliver

216 43T47316 Pipe, Suction

217 43T49010 Pipe, Shield

218 43T19003 Holder, Sensor

219 43T49009 Spring

220 43T49036 Plate, EVA-Seal

221 43T49039 Holder, Plate, EVA-Seal

Part

Description

– 72 –

2 3 9, 240

Location

No. No.

222 43T49036 Plate, EVA-Seal

223 43T49037 Holder, Plate EVA-Seal

224 43T79007 Guide Drain

225 43T39016 Fix For Motor

226 43T60075 Fan Motor Cord

227 43T21028 Motor, Fan

238 43T20014 Fan, Cross Flow

239 43T22008 Bearing

230 43T39015 Base, Bearing

231 43T03013 Back Body ASSY

232 43T03301 Back Body ASSY

233 43T07022 Holder, Pipe

234 43T82007 Plate, Installation

235 43T85065 Owner’s Manual

236 43T85064 Owner’s Manual

237 43T85317 Owner’s Manual

238 43T85318 Owner’s Manual

239 43T69070 Remote Control, Wireless

240 43T69071 Remote Control, Wireless

241 43T63003 Holder, Remote Control

242 43T62029 Cover, Terminal

Part

Description

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

11-3. Indoor Unit
RAS-18UKHP-E
RAS-18UKP-E
RAS-18UKPX
RAS-18UKP-AR
RAS-18UKPX-T

234

231, 232

233

Location

No. No.

201 43T00048 Front Panel, ASSY

202 43T00049 Grille ASSY

203 43T00050 Grille ASSY

204 43T80014 Air Filter (L)

205 43T80013 Air Filter (R)

206 43T80003 Filter, Frame

207 43T01004 Mark

208 43T03010 Body, Right

209 43T03011 Body, Left

210 43T03012 Hide, Claw

211 43T09036 Grille, Horizontal

212 43T70301 Hose ASSY, Drain

213 43T21029 Motor, Stepping

214 43T44311 Refrigeration Cycle Assembly

215 43T47311 Pipe, Deliver

216 43T47016 Pipe, Suction

217 43T49010 Pipe, Shield

218 43T19003 Holder, Sensor

219 43T49009 Spring

220 43T49036 Plate, EVA-Seal

221 43T49039 Holder, Plate EVA-Seal

Part

Description

– 73 –

2 3 9, 240

Location

No. No.

222 43T49038 Plate, EVA-Seal

223 43T49037 Holder, Plate EVA-Seal

224 43T79007 Guide Drain

225 43T39016 Fix For Motor

226 43T60075 Fan Motor Cord

227 43T21028 Motor, Fan

228 43T20014 Fan, Cross Flow

239 43T22008 Bearing

230 43T39015 Base, Bearing

231 43T03013 Back Body ASSY

232 43T03301 Back Body ASSY

233 43T07022 Holder, Pipe

234 43T82007 Plate, Installation

235 43T85065 Owner’s Manual

236 43T85064 Owner’s Manual

237 43T85317 Owner’s Manual

238 43T85318 Owner’s Manual

239 43T69070 Remote Control, Wireless

240 43T69071 Remote Control, Wireless

241 43T83003 Holder, Remote Control

242 43T62029 Cover, Terminal

Part

Description

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

11-4. Outdoor Unit

RAS-24UAH-E

Location

No. No.

01 43T00024 Panel, Air Outlet

02 43T00025 Panel, Front

03 43T00026 Panel, Side

04 43T42002 Base Assembly

05 43T19012 Guard, Fin

06 43T19011 Guard, Fan

07 43T91001 Plate, Roof

08 43T42005 Plate, Valve, Packed

09 43T15001 Handle

10 43T43317 Condenser Assembly

11 43T46014 Valve, Packed, 15.88

12 43T46016 Valve, Packed, 6.35

13 43T47310 Bonnet, 15.88 Dia.

14 43T47020 Bonnet, 6.35 Dia.

15 43T47025 Tube, Capillary 2.4 Dia.

16 43T60035 Terminal Block, 4P

17 43T60036 Terminal Block, 3P, 30A

18 43T60037 Filter, Clamp

19 43T41313 Compressor, PH310X3-4MM

20 43T62014 Protector, Cord

21 43T62015 Protector, Cord

Part

Description

– 74 –

Location

No. No.

22 43T49011 Base, Spring A

23 43T49019 Spring, Buffer

24 43T49012 Base, Spring B

25 43T21306 Motor, Fan, AC220 – 240V 50Hz

26 43T20010 Fan, Propeller, 490

27 43T96001 Bushing

28 43T96004 Bushing, Cord

29 43T62013 Cover, E-Parts

30 43T52301 Switch, Magnet, CLK-35J

31 43T55016 Capacitor, 60MFD, 420V

32 43T55014 Capacitor, 3.5MFD, 450V

33 43T96003 Clip, Cable

34 43T46482 Valve, 4way

35 43T43319 Coil, V-4way AC220 – 240V, VHV

36 43T69059 Sensor

37 43T69060 Sensor, TD

38 43T79004 Nipple, Drain

39 43T58301 Transformer, TT-05

40 43T69057 P.C. Board Assembly

42 43T47309 Tube, Capillary, 0.8 Dia.

Part

Description

MCC-1275

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

11-5. Outdoor Unit

RAS-24UA-E, RAS-24UAX, RAS-24UAX-T, RAS-24UA-AR

Location

No. No.

01 43T00024 Panel, Air Outlet

02 43T00025 Panel, Front

03 43T00026 Panel, Side

04 43T42002 Base Assembly

05 43T19012 Guard, Fin

06 43T19011 Guard, Fan

07 43T91001 Plate, Roof

08 43T42005 Plate, Valve, Packed

09 43T15001 Handle

10 43T43318 Condenser Assembly

11 43T46014 Valve, Packed 15.88

12 43T46016 Valve, Packed 6.35

13 43T47310 Bonnet, 15.88 Dia.

14 43T47020 Bonnet, 6.35 Dia.

15 43T47025 Tube, Capillary, 2.4 Dia.

16 43T60035 Terminal Block, 4P

17 43T60036 Terminal Block, 3P, 30A

18 43T60037 Filter, Clamp

19 43141301 Compressor, PH280X3-4MS

20 43T62014 Protector, Cord

Part

Description

Location

No. No.

21 43T62015 Protector, Cord

22 43T49011 Base, Spring A

23 43T49019 Spring, Buffer

24 43T49012 Base, Spring B

25 43T21013 Motor, Fan, AC220 – 240V 50Hz

26 43T20010 Fan, Propeller, 490

27 43T96001 Bushing

28 43T96004 Bushing, Cord

29 43T62013 Cover, E-Parts

30 43T52301 Switch, Magnet, CLK-35J

31 43T55021 Capacitor, 45MFD, 420V

32 43T55014 Capacitor, 3.5MFD, 450V

33 43T96003 Clip, Cable

41 43T33002 Spark Killer

42 43T47309 Tube, Capillary, 0.8 Dia.

Part

43T21014 Motor, Fan, AC220 – 240V 50Hz

Description

* Motor Fan 43T21014 use with model RAS-24UA-AR only

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

– 75 –

11-6 Outdoor Unit

RAS-18UAH-E

13

7

2

41

1

Location

No. No.

40

Part

28

35

29

32

30

Description

31

10

11

34

14

15

37,38

16,17

12

39

4

5

18,19

9

25
26

3

27

24

8

6

Location

No. No.

Part

20: Capillary tube 0.8 Dia.

21: Capillary tube 1.2 Dia.

22: Capillary tube 2.0 Dia.

Description

01 43005144 Front Cabinet

02 43T00005 Back Cabinet

03 43T00004 Side Cabinet

04 43042446 Base

05 43T00011 Packed Valve Plate

06 43T19007 Fan Guard

07 43T19005 Handle

08 43T19002 Guard Stopper

09 43T62301 E-Parts Cover

10 43020302 Propeller Fan

11 43T21313 Fan Motor, AC220 – 240V, 50Hz

12 43T47001 Nut Flange

13 43T96001 Bushing

14 43043609 Condenser

15 43T43316 Sub Condenser

16 43T46016 Valve Packed 6.35

17 43T47020 Bonnet, 6.35 Dia.

18 43T46019 Valve Packed 12.7

19 43T47018 Bonnet, 1.2 Dia.

20 43T47309 Tube, Capillary, 0.8 Dia.

21 43T47007 Tube, Capillary, 1.2 Dia.

22 43T47013 Tube, Capillary, 2.0 Dia.

24 43T41800 Compressor, PH250X3-4LM

25 43T49011 Base Spring A

26 43T49019 Spring Buffer

27 43T49012 Base Spring B

28 43T55021 Capacitor, 45MFD, 420V

29 43T55007 Capacitor, 2MFD, 450V

30 43T60014 Terminal Block, 3P

31 43T60035 Terminal Block, 4P

32 43T54005 Magnetic Swtich

34 43T58301 Transformer, TT-05

35 43T69057 P.C. Board Assembly MCC-1275

37 43T46482 Valve, 4 way

38 43T43319 Coil, V-4 way

39 43T79004 Nipple Drain

40 43T69059 Sensor

41 43T69060 Sensor TD

– 76 –

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

11-7. Outdoor Unit

RAS-18UA-E, RAS-18UAX, RAS-18UAX-T

Location

No. No.

01 43005144 Front Cabinet

02 43T00005 Back Cabinet

03 43T00004 Side Cabinet

04 43042446 Base

05 43T00011 Packed Valve Plate

06 43T19007 Fan Guard

07 43T19005 Handle

08 43T19002 Guard Stopper

09 43T62301 E-Parts Cover

10 43020302 Propeller Fan

11 43T21308 Fan Motor, AC220 – 240V, 50Hz

12 43T47001 Nut Flange

13 43T69001 Bushing

14 43T43301 Condenser

15 43T43314 Sub Condenser

16 43T46016 Valve, Packed 6.35

17 43T47020 Bonnet, 6.35 Dia.

18 43T46019 Valve, Packed 12.7

19 43T47018 Bonnet, 1.2 Dia.

Part

Description

– 77 –

23: Capillary tube 2.4 Dia.

Location

No. No.

23 43T47025 Tube, Capillary, 2.4 Dia.

24 43T41800 Compressor, PH250X3-4LM

25 43T49011 Base Spring A

26 43T49019 Spring Buffer

27 43T49012 Base Spring B

28 43T55021 Capacitor, 45MFD, 420V

29 43T55007 Capacitor, 2MFD, 450V

30 43T60014 Terminal Block, 3P

31 43T60035 Terminal Block, 4P

32 43T54005 Magnetic Switch

36 43T63004 Lead Wire Clamp

42 43T33002 Spark Killer

Part

Description

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

11-8. Outdoor Unit

RAS-18UA-AR

7

13

2

30

29

12

33

10

14

31

11

15

16,17

9

18,19

4

25

27

26

5

3

24

28

42

1

6

Location

No. No.

Part

Description

01 43005144 Front Cabinet

02 43T00005 Back Cabinet

03 43T00004 Side Cabinet

04 43042446 Base

05 43T00011 Packed Valve Plate

06 43T19007 Fan Guard

07 43T19005 Handle

08 43T19002 Guard Stopper

09 43T62301 E-Parts Cover

10 43020302 Propeller Fan

11 43T21993 Fan Motor, AC220 – 240V, 50Hz

12 43T47001 Nut Flange

13 43T69001 Bushing

14 43T43618 Condenser

15 43T43315 Sub Condenser

16 43T46016 Valve, Packed 6.35

17 43T47020 Bonnet, 6.35 Dia.

18 43T46019 Valve, Packed 12.7

19 43T47018 Bonnet, 1.2 Dia.

20 43T47309 Tube, Capillary, 0.8 Dia.

– 78 –

8

20: Capillary tube 0.8 Dia.

22: Capillary tube 2.0 Dia.

Location

No. No.

Part

Description

22 43T47013 Tube, Capillary, 2.0 Dia.

24 43T41800 Compressor, PH250X3-4LM

25 43T49011 Base Spring A

26 43T49019 Spring Buffer

27 43T49012 Base Spring B

28 43T55021 Capacitor, 45MFD, 420V

29 43T55007 Capacitor, 2MFD, 450V

30 43T60014 Terminal Block, 3P

31 43T60035 Terminal Block, 4P

33 43T52302 Magnetic Contactor

42 43T33002 Spark Killer

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

– 79 –

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007

TCTC Service Manual 24/18UKHP-E (EN) File No. SVM-01007