Toshiba RAS-12KSX-1 Service Manual Download Page 52

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No.

Part name

Bearing

Procedures

1) Follow to the procedure in the item .

2) Remove the two screws used to secure the

bearing base.

3) Remove the bearing base.

<Caution at assembling>

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

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

Remarks

Two screws

Bearing

Bearing base

FILE NO. SVM-08029

–

Summary of Contents for RAS-12KSX-1

Page 1: ...FILE NO SVM 08029 SERVICE MANUAL AIR CONDITIONER SPLIT WALL TYPE RAS 12SKSX 1 RAS 12SASX 1 April 2008 ...

Page 2: ...ON PROCEDURE 8 1 Safety Cautions 8 2 Installation Diagram of Indoor and Outdoor Units 8 3 Installation 8 4 Indoor Unit 8 5 Outdoor Unit 8 6 How to Set Remote Control Selector Switch 8 7 Others 9 TROUBLESHOOTING CHART 9 1 Troubleshooting Procedure 9 2 Basic Check Items 9 3 Primary Judgement 9 4 Self Diagnosis by Remote Control Check Code 9 5 Troubleshooting Flowcharts 9 6 Troubleshooting for Remote...

Page 3: ...um length One way Maximum height difference INDOOR UNIT RAS 12SKSX 1 Height mm 275 Dimensions Width mm 790 Depth mm 205 Net weight kg 9 Evaporator type Finned tube Indoor fan type Cross flow fan High fan m3 h 590 Air flow volume Medium fan m3 h 470 Low fan m3 h 410 Fan motor output W 20 Air filter Honeycomb woven filter with PP frame OUTDOOR UNIT RAS 12SASX 1 Height mm 530 Dimensions Width mm 660 ...

Page 4: ...gerant according to the table below Refrigerant RAS 12SKSX 1 RAS 12SASX 1 1 No need to charge 10m or less extra refrigerant 2 Need to charge Over 10m up to 15m 20g m extra refrigerant DB 27 C WB 19 C Outdoor unit inlet air temperture DB 35 C Indoor unit inlet air temperture Cooling JIS C9612 Temperature Condition ...

Page 5: ...ir filter Heat exchanger 275 2 CONSTRUCTION VIEWS 2 1 Indoor Unit Connecting pipe 0 35m 6 35mm Flare Installation plate hanger Drain hose 0 50m Connecting pipe 0 40m Installation plate hanger Flare 12 7mm 116 790 62 69 49 170 or more 170 or more 65 or more Minimum distance to wall Minimum distance to wall Minimum distance to ceiling FILE NO SVM 08029 Wireless remote control 54 16 135 Remote contro...

Page 6: ...C L C L FILE NO SVM 08029 2 2 Outdoor Unit 5 100 600 ...

Page 7: ...ver and indication parts CN03 CN01 2 1 2 1 1 2 1 2 Thermo Sensor TA Heat Exchanger Sensor TC C07 BLK WHI 2 1 C27 Switching Power DC 12 V DC 5 V GRN YEL WP 018 DB01 BLK P04 RY01 3 4 SG01 DSA R63 R62 F01 6 3 A 250 VAC L01 C25 C26 2 1 3 4 AC Motor Supply Voltage Regulator IC03 12V MCU 4 3 1 2 R64 GRN YEL Heat Exchanger BRW BLU N GRN YEL CN31 11 11 10 10 9 9 8 8 7 6 5 4 3 2 1 1 2 3 4 5 6 7 INDOOR OUTD...

Page 8: ...P20S 47mF 400 V 9 Fuse F01 BET6 3A T6 3A 250VAC 10 Varistor R62 R63 SR561K14DL 560 V 11 Louver motor MP24Z3T 12VDC 12 Relay Comp RY01 G4A 1A Rating 25A AC250V W W ST 001 No Parts name Type Specifications Output Rated 990 W 2 poles 1 phase 220 240 V 50Hz 1 Compressor QK222PCB Winding resistance W C R C S at 25 C 2 67 3 92 Output Rated 30 W 6 poles 1 phase 220 240 V 50Hz 2 Fan motor for outdoor Wind...

Page 9: ...P MPaG Surface temp of heat exchanger interchanging pipe T1 C Fan speed indoor 50Hz Heat exchanger Indoor unit Cross flow fan Cooling Cooling Compressor Heat exchanger Propeller fan Outdoor unit Capillary tube Æ1 7 x 800 QK222PCB Cooling Mark means check points of Gas Leak O D 12 7 mm O D 6 35 mm Cooling Packed valve Æ12 7 Packed valve Æ6 35 0 39 m Connecting pipe Æ12 7 0 49 m Connecting pipe Æ6 3...

Page 10: ...Main Unit Control Panel M C U Functions Operation Display Timer Display Auto Fan Sign Display Display Indoor Fan Motor Louver Motor Louver ON OFF Signal Compressor ON OFF Signal Power Supply Circuit Noise Filter Relay Driver Louver Driver Relay RY01 220 240 V 50Hz Compressor Outdoor Fan Motor Initiallizing Circuit Clock Frequency Oscillator Circuit Louver Control 3 minutes Delay at Restart for Com...

Page 11: ...utton SET 10 Cancel button CLR 20 11 ECO button ECO Fan speed button FAN Temperature button Start Stop button START STOP Check button CHK 1 2 9 7 1 Remote control 7 1 1 Function of Push Button MODE TEMP START STOP SWING MODE TIMER ON OFF SET CLR ECO RST CHK FIX FAN AUTOFAN DRY Hr ON OFF B TOSHIBA 12 2 13 14 2 13 11 20 12 1 1 1 3 4 5 6 7 8 1 2 9 COOL AUTO TEMP FAN AUTO QUIET 10 2 14 FILE NO SVM 080...

Page 12: ...O is in activated Press the ECO button to start and press it again to stop operate 5 A B change indicator remote controller When the remote controller switching function is set B appears in the remote controller display When the remote controller seting is A there is no indication at this position 6 Operation Indicate when press the operation ON OFF button 7 FAN speed indicator Indicates the selec...

Page 13: ...ommands from the indoor unit and operates the outdoor fan motor and the compressor 1 Role of indoor unit controller The indoor unit controller receives the operation commands from the remote control and executes them Temperature measurement at the air inlet of the indoor heat exchanger by the indoor temperature sensor Temperature measurement of the indoor heat exchanger by the heat exchanger senso...

Page 14: ...eration MODE button on the remote control is set to the cooling operation 1 The compressor outdoor fan and operation display lamp are controlled as shown in Fig 7 3 2 Fig 7 3 2 2 When FAN button is set to AUTO the indoor fan motor operates as shown in Fig 7 3 3 When FAN button is set to LOW MED or HIGH the motor operates with a constant air flow 1 2 3 3 2 5 2 1 5 1 0 5 0 5 0 M Preset temp C Room t...

Page 15: ... L S L L ON ON ON ON OFF OFF OFF Super Low C 7 3 4 Automatic operation MODE button on the remote control is set to the automatic operation 1 One of 2 operations Cooling or Fan only is selected according to difference between the preset temperature and the room temperature at which the automatic operation has started as shown in Fig 7 3 6 The Fan only operation continues until the room temperature ...

Page 16: ...door fan speed is L 7 6 FILTER CHECK LAMP When the elapsed time reaches 1000 hours turn off the FILTER indicator How to Turn Off FILTER Indicator Press RESET button on the indoor unit If RESET button is pushed while the FILTER NOTE When you want a temporary operation while the FILTER lamp lights press RESET button FILE NO SVM 08029 15 the FILTER indicator lights After cleaning the filters indicato...

Page 17: ...matic restarting function which allows the unit to restart operating with the set operating conditions in the event of a power supply being accidentally shut down The operation will resume without warning three minutes after power is restored This function is not set to work when shipped from the factory Therefore it is necessary to set it to work 7 7 1 How to Set the Auto Restart Function To set ...

Page 18: ... RESET button once more or use the remote controller to turn it on 7 7 2 How to Cancel the Auto Restart Function To cancel auto restart function proceed as follows Repeat the setting procedure the unit receives the signal and beeps three times The unit will be required to be turned on with the remote controller after the main power supply is turned off When the system is on stand by not operating ...

Page 19: ... unit falls Before doing the electrical work attach an approved plug to the power supply cord Also make sure the equipment is properly earthed Appliance shall be installed in accordance with national wiring regulations If you detect any damage do not install the unit Contact your TOSHIBA dealer immediately CAUTION Exposure of unit to water or other moisture before installation could result in elec...

Page 20: ...olutely sure that the installation of this appliance is reported to the local power supplier before installation If you experience any problems or if the installation is not accepted by the supplier the service agency will take adequate countermeasures FILE NO SVM 08029 ...

Page 21: ... hose sloped downward Do not allow the drain hose to get slack Cut the piping hole sloped slightly The auxiliary piping can be connected to the left rear left rear right right bottom right or bottom left Right Rear right Bottom right Rear left Bottom left Left 6 mm thick heat resisting polyethylene foam Batteries Pan head wood screw Remote control holder Vinyl tape Apply after carrying out a drain...

Page 22: ...s 8 3 Installation 8 3 1 Optional installation parts Fixing bolt arrangement of outdoor unit Fig 8 3 1 Secure the outdoor unit with fixing bolts and nuts if the unit is likely to be exposed to a strong wind Use 8 mm or 10 mm anchor bolts and nuts Q ty One each 1 One each Æ Æ Æ Æ FILE NO SVM 08029 500 mm 97 mm 53 mm 280 mm Drain outlet Air outlet Air inlet ...

Page 23: ... x 1 Wireless remote control x 1 Battery x 2 Part name Q ty Remote control holder x 1 Active Carbon Catechin filter x 2 Part No 4 5 6 Part No 7 Others Name Owner s manual Installation manual Part name Q ty FILE NO SVM 08029 l Mounting screw 4 x 25 x 6 l 3 1x 16 x 2 Pan head wood screw 22 ...

Page 24: ...on the mounting plate A drill the pipe hole 65 mm at a slight downward slant to the outdoor side NOTE When drilling a wall that contains a metal lath wire lath or metal plate be sure to use a pipe hole brim ring sold separately Mounting the installation plate Fig 8 4 3 65 mm 100 mm Pipe hole Fig 8 4 2 A place which provides the spaces around the indoor unit as shown in the diagram A place where th...

Page 25: ... in the wall Insert clip anchors for appropriate mounting screws NOTE Secure four corners and lower parts of the installation plate with 4 to 6 mounting screws to install it Installation plate Keep horizontal direction 8 4 3 Electrical work 1 The supply voltage must be the same as the rated voltage of the air conditioner 2 Prepare the power source for exclusive use with the air conditioner CAUTION...

Page 26: ...m 0 12 kgf m 7 Secure the connecting cable with the cord clamp 8 Fix the terminal cover rear plate bushing and air inlet grille on the indoor unit CAUTION Be sure to refer to the wiring system diagram labeled inside the front panel Check local electrical cords and also any specific wiring instructions or limitations FILE NO SVM 08029 8 4 4 Wiring connection about 15 cm Connecting cable Stripping l...

Page 27: ...ibing slits of the front panel with a knife or a making off pin cut them with a pair of nippers or an equivalent tool Fig 8 4 12 In case of bottom right or bottom left piping After scribing slits of the front panel with a knife or a making off pin cut them with a pair of nippers or an equivalent tool Fig 8 4 13 Die cutting Front panel slit Changing drain hose Piping preparation Rear right Rear lef...

Page 28: ...ing 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 Installation plate Auxiliary pipes Indoor unit Connecting cable 8 4 6 Indoor unit fixing 1 ...

Page 29: ...ot 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 to 10 m and can be increased until 15 m but need to extra charge 20 g m after over 10 m A place where the drain water does not raise any A place ...

Page 30: ...o 4 2 kgf m 12 70 50 to 62 5 0 to 6 2 kgf m 90 Outer dia A of copper pipe Rigid Imperial 6 35 0 5 to 1 0 1 0 to 1 5 9 52 0 5 to 1 0 1 0 to 1 5 12 70 0 5 to 1 0 1 5 to 2 0 8 5 2 Refrigerant piping connection 1 Cut the pipe with a pipe cutter Fig 8 5 2 2 Insert a flare nut into the pipe and flare the pipe Projection margin in flaring A Unit mm Fig 8 5 3 Tightening connection Align the centers of the...

Page 31: ...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 the vacuum pump 3 Open fully the low pressure side handle of the gauge manifold valve 4 Operate the vacuum pump to start evacuating Perform evacuating for about 15 minutes if the piping length is 20 meters 15 minutes for 20 mete...

Page 32: ...he selector switches Remote control selector switch When two indoor units are installed in the same room or adjacent two rooms if operating a unit two units may receive the remote control signal simultaneously and operate In this case the operation can be preserved by setting either one indoor unit or remote control to B setting Both are set to A setting in factory shipment The remote control sign...

Page 33: ...8029 8 7 3 Auto restart setting This product is designed so that after a power failure it can restart automatically in the same operating mode as before the power failure Information The product was shipped with Auto Restart function in the off position Turn it on as required How to set the auto restart Press and hold the RESET button for about 3 seconds After 3 seconds the electronic beeper makes...

Page 34: ...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 6 7 The compressor is not turned on even though the room temperature is in the range that the compressor is turned on The operation mode changes i...

Page 35: ...5Hz E OPERATION lamp is blinking 5Hz F OPERATION and TIMER lamps are blinking 5Hz G OPERATION TIMER and FAN ONLY lamps are blinking Table 9 3 2 Diagnosis by detective operation The remote control does not work The outdoor fan does not rotate Turn off the power supply once then turn it on Try to operate the remote control The compressor operates The compressor does not operate The remote control st...

Page 36: ... display of the remote control The timer lamp on the indoor unit blinks continuously 5 times per 1 sec 2 Press 8TEMP button If there is no fault with a code the indoor unit will beep once Pi and the display of the remote control will change as follows Check the unit with all 35 check codes 00 to 22 as shown in Table 9 4 1 Press 9TEMP button to change the check code backwards If there is a fault th...

Page 37: ...heck P C board 1 Check heat thermal fuse is blow or not Terminal block part 2 If the thermal fuse is not blow check indoor fan motor Refer to trouble shooting flow charts Replace P C borad 1 Check connective cable correct if wiring is wrong 2 Check thermal fuse and Terminal blocks 3 If it is OK check P C board 1 If overload relay and themostat for compres sor are OK check refrigerant cycle 2 If re...

Page 38: ...ES NO NO NO NO NO NO Does the thermal fuse blow Under PF Terminal Wrong wiring of AC cord or connecting cable is defective Replace the thermal fuse set Check connection Is the indication voltage DC12V or 5V of main P C board correct Does the CN14 connector the wrong connecting P C board is defective Replace the main P C board Is the voltage across C32 measured DC12V 15V Refer to the paragraph Pre ...

Page 39: ...the OPERATION lamp blink Is it wired as shown in Figure below Return the wiring of the power relay is returned to the normal procedure To the paragraph of No Power turns on YES NO NO YES FILE NO SVM 08029 38 1 2 Power Cord Indoor Terminal Block RY01 CN31 Black White Green Yellow Green Yellow Brown Blue PC Board WP 018 ...

Page 40: ... YES YES YES YES Does the power turn on by pushing the button of the remote control Is AC 220 240V supplied between terminal block 1 2 Relays RY01 Q02 or IC30 is failure Replace the P C board Is cable connection between indoor and outdoor units correct Correct cabling between indoor and outdoor units Does the OPERATION lamp blink See Power can not be turned on 9 5 3 Outdoor unit does not operate ...

Page 41: ...t Correct cabling between indoor and outdoor units Is the voltage across the outdoor terminal 1 2 AC 220 240V Cables between indoor and outdoor units are defective Are all the cords for compressor normal Re wire or replace the defective cords Is the compressor motor winding normal Check the winding resistor Compressor is defective Is the capacitor for compressor normal Capacitor is defective Is th...

Page 42: ...RY01 or IC30 or Q02 is failure Replace the P C board Is cable connection between indoor and outdoor units correct Correct cabling between indoor and outdoor units Is the voltage across the terminal Cables between indoor and outdoor units are defective Are all the cords for outdoor fan motor normal Correct the wire or replace the defective cords Is the outdoor fan motor winding normal Check the win...

Page 43: ... cross flow fan rotate normally Repair the bearing of the fan Thermal fuse operated due to prevent temperature rising cause of incompleted connecting Shut off the power supply Turn on the power supply Does the fan speed become higher Operation stops Motor control circuit failure IC30 IC03 Q08 T01 or 12V power circuit failire Replace the P C board Is the rotation signal DC 5V 0V output between 2 gr...

Page 44: ...O NO NO NO NO NO NO Is operation possible when setting the temporary switch of the air conditioner main unit to TEST RUN or TEMPORARY AUTO Can any signal tone be heard in a trasistor radio when transmitting within 5 cm distance from the radio P C board is failure Replace P C board Is operation possible when the transmitter is moved nearer to the infrared signal receiver of the air conditioner Batt...

Page 45: ...d hold the Whole housing Do not pull at the lead wire 2 Inspection procedres 1 When a P C board is judged to be defective check for disconnection burning or discolora tion of the copper foil pattern or this P C board 2 The P C board consists of the following 2 parts a Main P C board part power relay indoor fan motor drive circuit and control circuit C P U and peripheral circuits buzzer drive circu...

Page 46: ...pin 2 of RY01 and GND 2 Between No 1 and 2 of connecting cable terminal block AC 220 240V 1 All indicators light for 3 sec 2 Indicators do not indicate normally after approximate 3 sec 1 Compressor does not operate 2 OPERATION lamp blinks 1 Motor does not rotate The key operation is accepted 2 The Motor rotates but it vibrates too much Shut off the power supply and remove the P C board assembly fr...

Page 47: ...ure when need to set ten time of restart delay timer Press CLR button while pressing CHK button with a tip of a pencil 1 2 Then press START STOP button to transmit the signal to the indoor unit Table 9 6 2 Approximate resistance value of thermo sensor Temperature 0 C 10 C 20 C 25 C 30 C Resistance value 33 8 20 35 12 59 10 00 7 99 kΩ MODE AUTO COOL FAN TEMP TEMP START STOP SWING MODE TIMER ON OFF ...

Page 48: ...d with the refrigerant gas 2 Do not use welding equipment in an airtight room Carbon monoxide poisoning may result if the room is not properly ventilated 3 Do not bring welding equipment near flammable objects Flames from the equipment may cause the flammable objects to catch fire If keeping the power on is absolutely unavoidable while doing a job such as inspecting the cir cuitry wear rubber glov...

Page 49: ...ews 2 pcs 6 Take off three hooks of panel from rear side How to assemble the front panel 1 Press three center positions and two lower center positions of the air outlet and then hang the hanging hooks 3 pcs at the top side of the front panel to the rear plate 2 Tighten two screws Incomplete hanging or incomplete pressing may cause a dewdrops or generation of a fluttering sound 2 Screws Three hooks...

Page 50: ...sembly onto the claws on the back body and secure it using the fixing screw Now attach the display unit Connect the connectors for the fan motor and louver motor 2 Secure the grounding wire using the fixing screw Insert the TC sensor into the sensor holder Be absolutely sure to loop the grounding wire and TC sensor leads once at the bottom 5 Disengage the display unit by simply pushing at the top ...

Page 51: ...Remove the pipe holder from the rear side of the main unit 3 Remove two fixing screws at the left side of the end plate of the heat exchanger Remarks 4 Remove one fixing screw on the heat exchage fixing holder to separate the heat exchage from the back body 5 Remove right side of the end plate from two fixing rib while sliding slightly the heat exchanger rightward 2 screws Heat exchanger fixing ho...

Page 52: ...move the two screws used to secure the bearing base 3 Remove the bearing base Caution at assembling If the bearing is out from the housing push it into the specified position and then incorporate it in the main body Remarks Two screws Bearing Bearing base FILE NO SVM 08029 51 ...

Page 53: ...w of the cross flow fan 3 Remove two fixing screws of the motor cover and them remove the motor cover 4 Remove two more fixing screws of the motor band and remove the motor band Remarks 5 Pull the fan motor outward Set screw Motor cover Two Screws Two screws on motor band FILE NO SVM 08029 52 ...

Page 54: ...mm from wall of rear plate of the main unit Holding the set screw install the cross flow fan so that U groove of the fan motor comes to the mounting hole of the set screw Perform positioning of the fan motor as follows When assembling the fan motor the fan motor must be installed in such a way that the fan motor leads will be taken out is positioned at the bottom front After assembling the two hoo...

Page 55: ... the power cord and connecting cable attach the cord clamp and wiring cover Insert the upper part into the upper cabinet and insert the claw which has been hooked to the lower part into the square hole and then fix it with screw ST1T 4 x 10s 1 pc 3 Attach the valve cover ST1T 4 x 10s 1 pc Insert the upper part to the upper cabinet set the hook claw of the valve cover to square holes at three posit...

Page 56: ...gas 3 Remove the partition board ST1T 4 x 10s 3 pcs 4 Remove the sound insulation material 5 Remove the terminal cover of the compressor and disconnect the lead wire of the compressor thermo and the compressor from the terminal 6 Remove the pipe connected to the compressor with a burner Make sure the flame does not touch the 4 way valve 7 Remove the fixing screw of the base plate and heat exchange...

Page 57: ...ole of the front cabinet Push the hooking claws 8 positions by your hand and fix the claws Requirement This completes all the attaching work Check that all the hooking claws are fixed to the specified positions Fan guard Minus screwdriver Hooking claw 1 Perform the common procedure 1 2 Remove the fixing screw and the capacitor band 1 Screw 4 x 10s Capacitor for compressor Capacitor for fan motor 3...

Page 58: ...tion Part No No No No 402 43T60383 TERMINAL 406 43T69364 FUSE TEMPERATURE 403 43T69004 SENSOR HEAT EXCHANGER 407 43T60366 POWER CORD 404 43T69005 SENSOR THERMOSTAT 410 43T62003 CORD CLAMP 405 43T69641 PC BOARD ASSY WRS LED 411 43T69740 ASM PCB SERV Description Description 405 402 403 407 404 411 406 410 ...

Page 59: ... ASSEMBLY 206 43T49010 PIPE SHIELD 221 43T00493 PANEL SERVICE ASSEMBLY 207 43T63002 REMOTE CONTROL HOLDER 222 43T80318 AIR FILTER R 208 43T60382 MOTOR CORD 223 43T80319 AIR FILTER L 209 43T82310 INSTALLATION PLATE 224 43T09416 GRILLE OF AIR INLET 211 43T19333 SENSOR FIX PLATE 226 43T62328 TERMINAL COVER 212 43T09408 PIPE HOLDER 227 43T69437 WIRELESS REMOTE CONTROL 213 43T03362 BACK BODY ASSEMBLY 2...

Page 60: ...COVER 6 43T00448 FIXING PLATE VALVE 21 43T00481 UPPER CABINET 7 43T46332 VALVE PACKED 6 35 DIA 22 43T96305 BUSHING 8 43T46019 VALVE PACKED 12 7 DIA 23 43T62323 TERMINAL COVER 9 43T47331 BONNET 6 35 DIA 24 43T19336 FIN GUARD 10 43T47333 BONNET 12 70 DIA 25 43T54301 RELAY OVERLOAD 11 43T47014 CAPILLARY TUBE 1 7DIA 26 43T61310 ELECTRIC PARTS BASE 12 43T00487 FRONT CABINET 27 43T55337 MF CAPACITOR 13 ...

Page 61: ... 75 FILE NO SVM 03004 1 TOSHIBA CARRIER THAILAND CO LTD 144 9 MOO 5 BANGKADI INDUSTRIAL PARK TIVANON ROAD TAMBOL BANGKADI AMPHUR MUANG PATHUMTHANI 12000 THAILAND ...

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