Toshiba RAS-13SAX, RAS-13SKX, RAS-13SK-E, RAS-13SA-E SERVICE MANUAL

TO SH IB A

SERVICE M ANUAL

AIR-CONDITIONER

SPLIT W A LL TY PE

FILE N O . A 00-9701

RAS-13SK-E RAS-13SKX

R A S -13S A -E RAS-13SAX

P R IN T E D IN J A P A N , F e b .,1 9 9 7 T o M o

CONTENTS

1. SPECIFICATIONS............................................................................................................ 4

2. CONSTRUCTION VIEWS................................................................................................ 6

2-1. Indoor Unit .................................................................................................................................. 6

2-2. Outdoor Unit ............................................................................................................................... 7

3. WIRING DIAGRAM.......................................................................................................... 8

4. SPECIFICATIONS OF ELECTRICAL PARTS ................................................................. 9

4-1. Indoor Unit .................................................................................................................................. 9

4-2. Outdoor Unit ............................................................................................................................... 9

5. REFRIGERANT CYCLE DIAGRAM .............................................................................. 10

6. MICRO-COMPUTER BLOCK DIAGRAM .......................................................................11

7. OPERATION DESCRIPTIONS....................................................................................... 12

7-1. FAN ONLY Operation ......................................................................................................... ...... 12

7-2. COOL Operation ....................................................................................................................... 12

7-2-1. Louver Control ......................................................................................................................................13

7-3. DRY Operation.......................................................................................................................... 13

7-4. AUTO Operation ............................................................................................................. .......... 14

7-4-1. T emporary Auto .....................................................................................................................................14

7-5. ECONO. Mode................................................................................................................ ........... 15

7-5-1. Cooling................................................................................................................................................... 15

7-6. Low-Temperature Limit Control (Cooling Operation) .......................................................... 15

7-7. Auto Restart Function ............................................................................................................. 16

7-7-1. How to Set the Auto Restart.................................................................................................................16

7-7-2. How to Cancel the Auto Restart ..........................................................................................................17

7-7-3. In Case of Power Failure during the Timer Operation.......................................................................17

8. INSTALLATION PROCEDURE...................................................................................... 18

8-1. Safety Cautions ............................................................................................................ ............ 1 8

8-2. Installation Diagram of Indoor and Outdoor Units ............................................................... 20

8-3. Installation ................................................................................................................................ 21

8-3-1. Optional Parts........................................................................................................................................21

8-3-2. Installation Parts ...................................................................................................................................21

8-4. Indoor Unit ................................................................................................................ ................ 22

8-4-1. Cutting a Hole and Mounting Installation Plate .................................................................................22

8-4-2. Electrical Work ......................................................................................................................................23

8-4-3. Wiring Connection ................................................................................................................................24

8-4-4. Piping and Drain Hose Installation...................................................................................................... 26

8-4-5. Indoor Unit Installation .........................................................................................................................27

8-4-6. Drainage.................................................................................................................................................27

8-5. Outdoor Unit ............................................................................................................................. 28

8-5-1. Refrigerant Piping Connection ............................................................................................................29

8-5-2. Vacuum Pumping ..................................................................................................................................29

8-5-3. Wiring Connection ................................................................................................................................30

8-6. Others ........................................................................................................................................ 31

8-6-1. Gas Leak Test .................................................................................................................. ...................... 31

8-6-2. Test Operation .......................................................................................................................................31

8-6-3. Auto Restart Setting .............................................................................................................................31

– 2 –

9. TROUBLESHOOTING CHART...................................................................................... 32

9-1. What to be Prechecked First .................................................................................................. 3 2

9-1-1. Power Supply Voltage........................................................................................................................... 32

9-1-2. Incorrect Cable Connection between Indoor and Outdoor Units.....................................................32

9-1-3. Misleading but Good Operations.........................................................................................................33

9-2. Primary Judgement of Trouble Sources ............................................................................... 3 4

9-2-1. Role of Indoor Unit Controller..............................................................................................................34

9-2-2. Display of Abnormalities and Judgement of the Abnormal Spots...................................................34

9-3. Troubleshooting Flowcharts ................................................................................................... 38

9-3-1. Power can not be Turned on ................................................................................................................ 38

9-3-2. Power can not be Turned on after Replacing Indoor PC Board .......................................................39

9-3-3. Outdoor Unit does not Operate ...........................................................................................................39

9-3-4. Only Compressor does not Operate ...................................................................................................4 0

9-3-5. Only Outdoor Fan does not Operate ...................................................................................................41

9-3-6. Only the Indoor Fan does not Operate................................................................................................42

9-4. How to Check the Remote Control (Including the Indoor PC Board) ................................ 43

9-4-1. How to Check the PC Board.................................................................................................................4 4

9-4-2. PC Board Layout ...................................................................................................................................4 6

9-4-3. How to Reduce the Operation Time of the Anti-Restar t Timer ......................................................... 4 7

10. PART REPLACEMENT ................................................................................................. 48

10-1. Indoor Unit ................................................................................................................................ 48

10-2. Microcomputer ......................................................................................................................... 50

10-3. Outdoor Unit ............................................................................................................................. 51

11. CAUTIONS ON REPLACEMENT OF PC BOARD ASSEMBLY.................................... 52

12. EXPLODED VIEWS AND PARTS LIST......................................................................... 53

12-1. Indoor Unit (1)........................................................................................................... ................ 53

Indoor Unit (2)........................................................................................................................... 54

12-2. Outdoor Unit ............................................................................................................................. 55

– 3 –

1. SPECIFICATIONS

Item

Capacity

Power source

Power consumption Power factor

Running current Starting current

Moisture removal Noise

Refrigerant Refrigerant control

Interconnection pipe

Condensate drain pipe

INDOOR UNIT

Dimensions

Net weight Evaporator type Indoor fan type

Air volume

Fan motor output Air filter

OUTDOOR UNIT

Dimensions

Net weight Condenser type Outdoor fan type Airflow volume Fan motor output

Compressor Safety device

Auto louver Usable outdoor temperature range

Indoor (H/M/L) Outdoor (220/230/240V) Name of refrigerant Rated volume

Gas side size Connection type Liquid side size Connection type Maximum length (of one way) Maximum height difference

Indoor unit Outdoor unit

Outer diameter

Height Width Depth

High fan Medium fan Low fan

Height Width Depth

(220/230/240V) Model Output

Model

kW Phase

V Hz kW % A Indoor/Outdoor A lit/h dB dB

m *2

↑ ↓

m mm

mm mm mm kg

m3/h m3/h m3/h W

mm mm mm kg

m3/h W

°C

RAS-13SK-E/13SA-E RAS-13SKX/13SAX

COOLING

220V 230V 240V

3.70 3.70 3.75 Single

220/230/240

1.25/1.27/1.29 98/97/95

220V 220V 220V

0.15/5.66 0.15/5.56 0.15/5.53 24

2.0 44/39/36 47/48/48

R22

0.83

Capillary tube

12.7

Flare connection

6.35

Flare connection

RAS-13SK-E/RAS-13SKX

265 790 174

Finned tube

Cross flow fan

650 560 510

Polypropylene net filter (Washable)

RAS-13SA-E/RAS-13SAX

538 780 300

Finned tube

Propeller

1710/1800/1890

PH160T2-4L2

1100

Fuse, Overload relay

Yes

21 ~ 43

Specifications are subject to change without notice.

– 4 –

Note : *1

• Capacity is based on the following temperature conditions.

Condition

T emperature

(DB)

Indoor unit inlet air temperature

(WB)

(DB)

Outdoor unit inlet air temperature

(WB)

Notes : *2 CHARGELESS

• No additional refrigerant required.

• This air conditioner accepts a connection piping length of up to 15m and a head of up to 6m.

• There is no need to add the refrigerant as long as the total length of the connection piping is up to 15m.

JIS C9612-1994

Cooling

27°C 19°C 35°C 24°C

– 5 –

2-1. Indoor Unit

,,,,,,,,,,,,,,,,

,,,,,,,,,,,,,,,,,

RAS-13SK-E RAS-13SKX

Air inlet

2. CONSTRUCTION VIEWS

Air filter

790

Heat exchanger

174

265

Air outlet

232 326 232

Drain hose (0.54m)

Hanger

Connecting pipe (0.39m)

(Flare ø12.7)

790

Hanger

321

1800

13SK-E : Without power cord 13SKX : With power cord

Connecting pipe (0.49m)

(Flare ø6.35)

Front panel

Back body

Knock out system

65965.5 450

Hanger

326

66 or more

Minimum distance

2.5

Minimum distance

17 20

265

to wall

120 or more 120 or more

3.5

40.5

Center line

to ceiling

Installation plate outline

HangerHanger

790

– 6 –

12626931976

65.5 Hanger

For stud bolt (ø8~ø10)

For stud bolt (ø6)

Minimum distance to wall

20 2037

40.5

60.5

Wireless remote control

Remote control holder

136

112.8

559.6

2-2. Outdoor Unit

RAS-13SA-E RAS-13SAX

Detail Drawing

325

301

ø11x14 hole

Handle

300

50 36

600

R10

ø6 hole

120

52.5

538

325

Fan guard

ø420

ø25Drain outlet

6-ø11x14 hole (for ø8-ø10 anchor bolt)

600 780

Gas side (Flare ø12.7)

Liquid side (Flare ø6.35)

8-ø6 hole ( (for fixing outdoor unit)

Electric Parts cover

130

100

(8.5)

325 (pitch)

342

Service Port

(8.5)

Installation dimension

100 or more

325

100 or more

Air outlet

View

600

– 7 –

Air inlet

600 or more

4xø11x14 Long holes (for ø8-ø10 anchor bolt)

3. WIRING DIAGRAM

Model Section A

RAS-13SK-E/SA-E

220/230/240V ~

50Hz

RAS-13SKX/SAX

220/230/240V ~

50Hz

GRN&YEL

Section A

POWER

TERMINAL

BLOCK

OVER LOAD

RELAY

COMPRESSOR

LOUVER

L N

MOTOR

FAN MOTOR

THERMAL FUSE

L N

P04

BRW

BLU

SG01 DSA

BLK

L N

RY02

77˚C x 2

R109

VARISTOR

F01 FUSE

T3.15A

250V

RY01

GRY

1 1

R21

GRY

3 3

CN04

R116

C15

IC04

L01

CN07

BLU

6 6

R01

C01

PNK

YEL

3 3

ORN

RED

DB01

BRW

1 1

C02

BLK

BLU

YEL

WHI

5 5

RED

CN10

MAIN P.C. BOARD

MCC-713

T01

DC 35V

DC 12V

DC 7V

BLK WHI

C06

DC 0V

IC02

IC01

BLU

3 3

BLU

56789

BLU

56789

PNK

BLK

CN13

WHI

CN25

CN03 CN01

BLK

1 1

BLK

2 2

BLK

INFRARED RAYS RECEIVE

INDOOR

TERMINAL

BLOCK

BLK

WHI

GRN&YEL

AND INDICATION PARTS

INDOOR

THERMO SENSOR

(TA)

DSA : Surge absorber

HEAT

EXCHANGER

SENSOR

(TC)

OUTDOOR

TERMINAL

BLK

RED WHI

BLOCK

BLK

FAN MOTOR

BLK

RED

GRN & YEL

CHASSIS

RED

CAPACITOR

RED

WHI

CAPACITOR

COLOR IDENTIFICATION

BROWN

BRW

RED

WHITE

WHI

YELLOW

YEL

BLUE

BLU

BLACK

BLK

GRAY

GRY

PINK

PNK

ORANGE

ORN

GRN&YEL

GREEN & YELLOW

– 8 –

4-1. Indoor Unit

RAS-13SK-E RAS-13SKX

4. SPECIFICATIONS OF ELECTRICAL PARTS

No.

Fan motor (for indoor)

Thermo sensor

(TA-sensor)

DC-DC transformer (T01)

Microcomputer Power relay (RY01),

Common relay (RY02) Heat exchanger sensor

(TC-sensor)

Line filter (L01)

Diode (DB01)

Capacitor (C02) Fuse (F01)

10 11

Power supply IC (IC01) Varistor (R21, R109)

12 13

Resistor (R01) Louver motor

Parts name

Type

ICF-35-19-3

TICF-35-19-3

(microprocessor)

SWT-34

TMP87CK40F

DI1U

(microprocessor)

RF-103YOR6

RBV-406

CEAUF2W101M20

MT3

MA2830-FJ

15G561K

ERF-5TK5R6

MP35EA7

Specifications

DC35V, 19W

10kΩ at 25°C DC390V, Secondar y DC35V, 12V, 7V

Coil : DC12V 75mA, Rated AC250V 20A

10kΩ at 25°C 10mH, AC 0.6A

4A, 600V 100µF, 450V T3.15A, 250V 4A, 600V 560V

5.6 Ω, 5W Output (Rated) 2W, 10poles, 1phase, DC12V

4-2. Outdoor Unit

RAS-13SA-E RAS-13SAX

No.

Compressor

Fan motor (for outdoor)

Running capacitor

(for fan motor) Running capacitor

(for compressor)

Overload relay

Parts name

Type

PH160T2-4L2

UE6-31C5P

SK-50FMP

SK-40CMP35U1

J-MRA99253-9200

Specifications

Output (Rated) 1100W, 2pole, 1phase, 220/230/240V, 50Hz Winding resistance (Ω)

(at 20°C) Output (Rated) 27W, 6pole, 1phase, 220/230/240V, 50Hz

Winding resistance (Ω) (at 20°C)

500V AC, 1.5µF

400V AC, 35µF U/T 10.1A (80°C), OPEN 135±5°C, CLOSE 75±11°C

Red-Black White-Black

2.38 3.65

Red-Black White-Black

210 435

– 9 –

RAS-13SK-E / RAS-13SA-E RAS-13SKX / RAS-13SAX

5. REFRIGERANT CYCLE DIAGRAM

Auxiliary pipe

0.39m ø9.52 (ø3/8 in)

Connecting pipe ø12.7 (O.D.) (ø1/2 in)

Compressor

Accumulator

PH160T2-4L2

Indoor unit

Evaporator

Cross flow fan

Condenser

Capillary tube

ø1.7 x 900

Dryer

Auxiliary pipe

0.49m ø6.35 (ø1/4 in)

Connecting pipe ø6.35 (O.D.) (ø1/4 in)

Max. longth 15m

Allowable height 6m

Propeller fan

Refrigerant R22 0.83kg

Cooling

Outdoor unit

Mark ( ) means check points of Gas Leak

Fig. 5-1

Table 5-1

50Hz

Standard

Cooling High temperature

Low temperature

Standard pressure

(kg/cm²G)

13SK-E

13SKX

5.0

6.0

3.0

Surface temp. of heat

exchanger interchanging

pipe T1 (°C)

13SK-E

13SKX

10.0

15.0

2.0

Fan speed

(indoor)

High High Low

Note :

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

Ambient temp.

conditions DB/WB

(°C)

Indoor Outdoor

27/19 35/24 32/23 43/26 21/15 21/15

– 10 –

6. MICRO-COMPUTER BLOCK DIAGRAM

Operation

C. P. U

Timer

Display

Functions

Display

• Louver Control

ECONO.

Sign Display

• 3-minute Delay at Restart for Compressor

Indoor

FAN-ONLY

Sign Display

• Motor Revolution Control

• Processing

Fan Motor

(Temperature Processing)

• Timer

Motor

Louver

ON/OFF Signal

Relay Driver, Louver Driver

ON/OFF Signal

Compressor, Outdoor Fan

Relay

Outdoor Fan Motor

RY01

Compressor

RY02

Relay

Main Unit Control Panel

Thermo Sensor

Heat Exchanger Sensor

Initializing Circuit

Infrared

Infrared Rays Signal Receiver

Oscillator Circuit

Clock Frequency

Rays

Remote Control

Operation (START/STOP)

Circuit

Power Supply

Thermo Setting

Operation Mode Selection

AUTO, COOL, DRY, FAN ONLY

Noise Filter

ON TIMER Setting

Fan Speed Selection

– 11 –

OFF TIMER Setting

Louver AUTO Swing

Louver Direction Setting

ECONO.

220/230/240V~

50Hz

7. OPERATION DESCRIPTIONS

(Room temp. – Set temp.)

Set temp.

OFF

OPERATION

display

ON ON

Compressor

Outdoor fan

(RY01)

Common relay

(RY02)

7-1. FAN ONLY Operation

(MODE of the remote control : FAN ONLY) (1) During this mode, the relay RY01 is alwa ys turned

off so that only the indoor fan is operated. RY02 is always turnd on.

1) When the FAN is set to AU TO, the indoor fan motor operates as shown in Fig 7-1-1.

2) When the FAN is set to LOW, MED, or HIGH, the indoor fan motor operates with a constant in volume as listed in Table 7-1-1.

28 27

Room temp.

26 25 24

Fig. 7-1-1 Auto setting of air volume

Table 7-1-1 Manual setting of FAN SPEED

Indication of

FAN SPEED

HIGH

MED

LOW(+)

LOW

HIGH Air volume

(m3/h)

7-2. COOL Operation

(MODE of the remote control : COOL) (1) Compressor, outdoor fan and operation displa y are

controlled as shown in Fig. 7-2-1.

Fig. 7-2-1

(2) Relays R Y01 and R Y02 are turned on to energize

the outdoor unit, and a cool operation is carried out.

1) When the FAN is set to AUTO, the indoor fan motor operates as shown in Fig 7-2-2.

2) When the FAN is set to LOW, MED, or HIGH, the indoor fan motor operates with a constant in volume as listed in Table 7-1-1.

(2) Once the setting is made, the operation mode is

memorized in the microcomputer so that the same operation can be effected thereafter simply by pushing the START/STOP button.

LOW MED

HIGH

510 560 650

– 12 –

FAN

Manual

According to the set

position

+4 +3 +2 +1

(Room temp. – Set temp.)

Set

temp.

RY01

OFF

AUTO

HIGH

MED

LOW(+)

LOW LOW

(continuous)

Fig. 7-2-2

(3) Once the setting is made, the operation mode is

memorized in the microcomputer so that the same operation can be effected thereafter simply by pushing the START/STOP button.

7-2-1. Louver Control

(Room temp. – Set temp.)

Set temp.

OFF

OPERATION

display

Compressor

Outdoor fan

(RY01)

Common relay

(RY02)

ON:6min.

OFF:4min.

ON:5min.

OFF:5min.

(1) By pushing the SET button of the remote control

during the operation, the louver can be set to the desired position.

And the louver position is stored in the microcomputer, the louvers will be set to the position automatically at the next operation.

(2) When the AUT O b utton is pushed, the louv er v er-

tically swings within range of 25deg.

7-3. DRY Operation

(MODE of the remote control : DRY) (1) Compressor, outdoor fan and operation displa y are

controlled as shown in Fig. 7-3-1.

Fig. 7-3-1

– 13 –

• The microprocessor turns the compressor on and off at regular intervals (4 to 6 minutes on and/or off). During the compressor off, the indoor fan will operate in the super low position.

• The indoor fan will operate in the AUTO position.

(2) The pattern of operation depending on the rela-

tion between room temperature and set temperature is shown below:

Room temp.

Set temp.+1 Set temp.

Compressor Outdoor fan

Indoor fan

ON ON ON ON

OFF OFF OFF

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

Super Low

Fig. 7-3-2

7-4. AUTO Operation

(MODE of the remote control : AUTO) (1) One of the 2 modes, Cooling or Dry is selected

according to room temperature at which operation is to start, as shown in Fig. 7-4-1. The Fan mode will continue until room temperature reaches a level at which another mode is selected.

7-4-1. Temporary Auto

When the TEMPORAR Y button is pushed, the set temperature is fixed at 24°C and controlled in accordance with the chart shown in Fig. 7-4-1.

Cooling mode

Dry mode

(Room temp. – Set temp.)

(The same cooling mode as the room temperature control is set at set temp.) The Louver moved downward.

(The same cooling mode as the room temperature control is set at set temp. )

(The same dry operation as the room temperature control is set at set temp. )

Fig. 7-4-1

– 14 –

7-5. ECONO. Mode

When the ECONO. button is pushed, during COOL , and AUTO operation, the OPERATION display is turned off and the ECONO. display is lit and the indoor unit operates quietly and mildly with controlling airflow.

7-5-1. Cooling

(1) In the ECONO. mode, the set temp. by the remote

control is changed automatically as shown in Fig. 7-5-1.

(2) Fan speed → LOW

(˚C)

Set temp. is changed

7-6. Low-Temperature Limit Control

(Cooling Operation)

The microprocessor detects the indoor heat exchanger temperature so as to prevent freezing up the indoor heat exchanger.

Control is performed as shown in Fig. 7-6-1.

Heat exchanger temperature

(˚C)

6 2

Fig. 7-6-1

Compressor

Less than 2˚C continues

Outdoor fan

for 5 minutes

OFF

Set temp.

1H 2H TIME0H

ECONO. button is pushed

Fig. 7-5-1

– 15 –

7-7. Auto Restart Function

This unit is equipped with an Automatic restarting facility which allows the unit to restart and resume the set operating conditions in the event of a power supply shutdown without the use of the hand control.

The operation will resume without warning three minutes after the power is restored.

The Auto Restart function is set not to work on shipment from the factory, and so it is necessary to set it to function as required.

• When the system is stand-by (not running)

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

To set the Auto Restart function, proceed as follows: Access the TEMPORARY button located in the lower

right hand corner beneath the hinged front panel of the indoor unit (please refer to section on PARTS NAME). The po wer supply to the unit must be on - the function will not be set if the power is off.

To enable the Auto Restart function, press the TEMPORARY button continuously for three seconds.

The unit will acknowledge the setting and beep three times. The system will now restart automatically.

The above A uto Restart settings can be carried out:

OPERATION

Press the TEMPORARY button continuously more than three seconds.

TEMPORARY

• When the system is operating

OPERATION

Press the TEMPORARY button continuously more than three seconds.

TEMPORARY

MOTION

Stand-by

↓

The system starts to operate. The green light will be lit.

↓ about three seconds after

The unit beeps three times. The orange light will be lit.

↓

The system is operating. The orange light is lighting. If the system is not required to run at this time, press the TEMPORARY

button once more or use the remote control to stop it.

MOTION

Operating The green light is lit.

↓

The system stops to operate. The green light is turned off.

↓ about three seconds after

The unit beeps three times.

↓

The system stops. If the system is not required to stop at this time, use the remote control

to restart it.

During subsequent operation, the orange light is lit.

• The Auto Restart function will not accept an instruction if timer operation with the remote control is selected.

(Please refer to the section on setting the timer or setting the louver.)

• During louver swing (A UT O) operation, after restart by the Auto Restart function the louver swing stops.

– 16 –

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

To cancel the Auto Restart function, proceed as follows:

Repeat the setting procedure: the unit will acknowledge the instruction and bleep three times.

• When the system is stand-by (not running)

The system will now be required to manually restart with the remote control after the main supply is turned off.

Cancellation is carried out:

OPERATION

Press the TEMPORARY button continuously more than three seconds.

TEMPORARY

• When the system is operating

OPERATION

Press the TEMPORARY button continuously more than three seconds.

TEMPORARY

MOTION

Stand-by

↓

The system starts to operate. The orange light will be lit.

↓ about three seconds after

The unit beeps three times. The green light will be lit.

↓

The system is operating. If the system is not required to run at this time, press the TEMPORARY

button once more or use the remote control to stop it.

MOTION

Operating The orange light is lit.

↓

The system stops to operate. The orange light is turned off.

↓ about three seconds after

The unit beeps three times.

↓

The system stops. If the system is not required to stop at this time, use the remote control

to restart it.

During subsequent operation, the green light is lighting.

7-7-3. In Case of Power Failure during the

Timer Operation

(1) If ON-TIMER operation is reserved with setting of

Auto Restart operation, it is cancelled with power failure. (The OPERATION lamp on the main unit goes on and off to inform of power failure.) In that case, try to reserve ON-TIMER operation once again.

(2) If OFF-TIMER operation is reserved without set-

ting of Auto Restart operation, the reservation is cancelled with power failure. (The OPERATION lamp on the main unit goes on and off to inform of power failure.) In that case, try to reserve OFFTIMER operation. When Auto Restart operation is set, OFF-TIMER reservation is also cancelled with power failure.

– 17 –

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