Toshiba RAS-10N3AV-E Service Manual Download Page 1

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FILE NO. SVM-12029

SERVICE MANUAL

AIR CONDITIONER

SPLIT WALL TYPE

August, 2012

RAS-10N3KV-E / RAS-10N3AV-E

SWI

FAN

FIX

QUIET

Hi POWER

ONE-T OU

COMFOR

SLEEP

Summary of Contents for RAS-10N3AV-E

Page 1: ...FILE NO SVM 12029 SERVICE MANUAL AIR CONDITIONER SPLIT WALL TYPE August 2012 RAS 10N3KV E RAS 10N3AV E SWING FAN FIX QUIET HiPOWER ONE T OUCH COM FOR T SLEE P ...

Page 2: ...5 WIRING DIAGRAM 16 6 SPECIFICATIONS OF ELECTRICAL PARTS 18 7 REFRIGERANT CYCLE DIAGRAM 19 8 CONTROL BLOCK DIAGRAM 21 9 OPERATION DESCRIPTION 23 10 INSTALLATION PROCEDURE 46 11 HOW TO DIAGNOSE THE TROUBLE 59 12 HOW TO REPLACE THE MAIN PARTS 79 13 EXPLODED VIEWS AND PARTS LIST 88 1 FILE NO SVM 12029 ...

Page 3: ...isconnect the appliance from the main power supply This appliance must be connected to the main power supply be means of a circuit breaker or a switch with a contact separation of at least 3 mm in all poles The installation circuit breaker must be used specified for the power supply line of this air conditioner DANGER FOR USE BY QUALIFIED PERSONS ONLY TURN OFF MAIN POWER SUPPLY BEFORE ATTEMPTING A...

Page 4: ...essure may by generated in the refrigeration cycle which may result in a failure or explosion of the product or an injury to your body CAUTION Exposure of unit to water or other moisture before installation could reslt in electric shock Do not store it in a wet basement or expose to rain or water After unpacking the unit examine it carefully for possible damage Do not install in a place that can i...

Page 5: ...tdoor unit Unit model RAS 10N3AV E Dimension Height mm 530 Width mm 660 Depth mm 240 Net weight kg 27 Compressor Motor output W 750 Type Single rotary type with DC inverter variable speed control Model DA89X1C 23EZ Fan motor output W 20 Air flow rate Cooling Heating m3 min 27 27 Piping Type Flare connection connection Indoor unit Liquid side mm 6 35 Gas side mm 9 52 Outdoor unit Liquid side mm 6 3...

Page 6: ...9o C Outdoor DB 35o C Air Flow High Pipe Length 5m Voltage 230V Conditions Indoor DB 20o C Outdoor DB 7o C WB 6o C Air Flow High Pipe Length 5m Voltage 230V 50 55 60 65 70 75 80 85 90 95 100 105 32 33 34 35 36 37 38 39 40 41 42 43 Cooling Capacity ratio Outside Temperature o C 0 20 40 60 80 100 120 10 5 0 5 10 Heating Capacity ratio Outside Temperature ºC Conditions Indoor DB 27o C WB 19o C Indoor...

Page 7: ... in the refrig eration cycle may become abnormally high so that a rupture or personal injury may be caused 5 After completion of installation work check to make sure that there is no refrigeration gas leakage If the refrigerant gas leaks into the room coming into contact with fire in the fan driven heater space heater etc a poisonous gas may occur 6 When an air conditioning system charged with a l...

Page 8: ...et joints Nominal diameter 1 4 3 8 1 2 5 8 Reference outer diameter of copper pipe jointed mm 6 35 9 52 12 70 15 88 Minimum joint thickness mm 0 50 0 60 0 70 0 80 3 2 2 Processing of Piping Materials When performing the refrigerant piping installation care should be taken to ensure that water or dust does not enter the pipe interior that no other oil than lubricating oils used in the installed air...

Page 9: ... to 0 5 0 to 0 5 0 to 0 5 0 to 0 5 Conventional flare tool Clutch type Wing nut type 1 0 to 1 5 1 5 to 2 0 1 0 to 1 5 1 5 to 2 0 1 0 to 1 5 2 0 to 2 5 1 0 to 1 5 2 0 to 2 5 Table 3 2 4 Dimensions related to flare processing for R22 Nominal diameter 1 4 3 8 1 2 5 8 Outer diameter mm 6 35 9 52 12 70 15 88 Thickness mm 0 8 0 8 0 8 1 0 A mm Flare tool for R22 clutch type 0 to 0 5 0 to 0 5 0 to 0 5 0 t...

Page 10: ...torque for R410A is the same as that for conventional R22 Incidentally when the torque is weak the gas leakage may occur When it is strong the flare nut may crack and may be made non removable When choosing the tighten ing torque comply with values designated by manufacturers Table 3 2 7 shows reference values NOTE When applying oil to the flare surface be sure to use oil designated by the manufac...

Page 11: ...ant charging Refrigerant cylinder Leakage detector Charging cylinder Usage Pipe flaring Flaring by conventional flare tool Connection of flare nut Evacuating refrigerant charge run check etc Vacuum evacuating Refrigerant charge Refrigerant charge Gas leakage check Refrigerant charge R410A air water heat pump installation Existence of new equipment for R410A Yes Yes Yes Yes Yes Yes Yes Yes Note 2 W...

Page 12: ...d the connecting port of the electronic balance and charge liquid refrigerant Indoor unit Outdoor unit Opened Opened Refrigerant cylinder with siphon Check valve Open close valve for charging Electronic balance for refrigerant charging Opened Closed Service port 3 4 Recharging of Refrigerant When it is necessary to recharge refrigerant charge the specified amount of new refrigerant according to th...

Page 13: ... of silver and copper It is used to join iron copper or copper alloy and is relatively expensive though it excels in solderability 2 Phosphor bronze brazing filler Phosphor bronze brazing filler is generally used to join copper or copper alloy 3 Low temperature brazing filler Low temperature brazing filler is generally called solder and is an alloy of tin and lead Since it is weak in adhesive stre...

Page 14: ... flux which does not contain chlorine 3 When adding water to the flux use water which does not contain chlorine e g distilled water or ion exchange water 4 Remove the flux after brazing 3 5 3 Brazing As brazing work requires sophisticated techniques experiences based upon a theoretical knowledge it must be performed by a person qualified In order to prevent the oxide film from occurring in the pip...

Page 15: ...er 57 Hanger Hanger Hanger Installation plate outline Center line 8 10 For stud bold For stud bold 6 215 145 145 215 235 605 Flare 6 35 Drain hose 0 5m Hanger Connecting pipe 0 37m Connecting pipe 0 37m Flare 9 52 500 105 135 55 60 55 50 50 60 Knock out system 8 52 58 195 Front panel Knock out system Grille Inlet 8 60 Air filter Heat exchanger Air inlet Air outlet 740 250 ...

Page 16: ...FILE NO SVM 12029 15 4 2 Outdoor Unit C L C L 280 400 ...

Page 17: ... YEL YEL Louver Motor 1 2 3 4 WHI CN22 Color indication BRW BROWN YEL YELLOW BLK BLACK RED RED BLU BLUE WHI WHITE GRN YEL GREEN YELLOW Fan Motor AC Motor 5 Power Supply Circuit Main P C Board WP 020 DC5V DC12V 3 T3 15A Fuse F01 CN01 CN51 Varistor Line Filter Check Items OPERATION indicator Check to see if the OPERATION indicator goes on off when the main switch or circuit breakers turned on or pow...

Page 18: ... 17 FILE NO SVM 12029 5 2 Outdoor Unit From Main Line ...

Page 19: ... No Parts name Type Specifications L 19mH 10A 2 Outdoor fan motor WLF 240 20A 1 AC 240V 20W 3 Suction temp sensor TS sensor Inverter attached 10kΩ 25 C 4 Discharge temp sensor TD sensor Inverter attached 62kΩ 20 C 5 Outside air temp sensor TO sensor Inverter attached 10kΩ 25 C 6 Heat exchanger temp sensor TE sensor Inverter attached 10kΩ 25 C Reactor 1 1 Fan motor for indoor 20A AC250V DA89X1C 23E...

Page 20: ...anger Cross flow fan Deoxidized copper pipe Outer dia 6 35mm Thickness 0 8mm Sectional shape of heat insulator Allowable height difference 10m Allowable pipe length P Pressure measurement Gauge attaching port Vacuum pump connecting port TD 4 way valve STF 0108Z Compressor DA89X1C 23E2 T2 Outdoor heat exchanger Temp measurement Propeller fan Refrigerant amount 0 63kg OUTDOOR UNIT Muffler Muffler Ø1...

Page 21: ...0 9 to 1 1 9 to 11 47 to 49 High High 54 Heating Tempeature Standard Heat exchanger Indoor Outdoor Compressor condition C pressure pipe temp fan mode fan mode revolution Indoor Outdoor P MPa T1 C T2 C rps 20 7 6 2 4 to 2 6 43 to 45 0 to 3 High High 68 NOTES 1 Measure surface temperature of heat exchanger pipe around center of heat exchaner path U bent Thermistor themometer 2 Connecting piping cond...

Page 22: ...lator Circuit Power Supply Circuit Infrared Rays 36 7kHz Remote Controller Thermo Setting Fan Speed Selection ON TIMER Setting OFF TIMER Setting Louver AUTO Swing Louver Direction Setting QUIET Operation Mode Selection AUTO COOL DRY HEAT REMOTE CONTROLLER ECO Hi POWER Heat Exchanger Sensor Tc Room Temperature Sensor Ta Infrared Rays Signal Receiver and Indication Functions Cold draft preventing Fu...

Page 23: ...Fan motor 4way Valve Relay High power factor correction circuit 1 PWM synthesis function 2 Input current release control 3 IGBT over current detect control 4 Outdoor fan control 5 High power factor correction control 6 Signal communication to indoor unit M C U M C U Inverter DC AC Compressor Discharge temp sensor Outdoor air temp sensor Heat Exchanger temp sensor MICRO COMPUTER BLOCK DIAGRAM From ...

Page 24: ...followed to judgment of serial signal from indoor side Detection of inverter input current and current release operation Over current detection and prevention operation to IGBT module Compressor stop function Compressor and outdoor fan stop function when serial signal is off when the serial signal does not reach the board assembly of outdoor control by trouble of the signal system Transferring of ...

Page 25: ...ment 32 3 Swing 32 8 ECO operation 33 9 Temporary operation 34 10 Discharge temperature control 34 11 Self Cleaning function 35 12 Remote A or B selection 36 9 3 Auto Restart Function 9 3 1 How to Set the Auto Restart Function 39 9 3 2 How to Cancel the Auto Restart Function 40 9 3 3 Power Failure During Timer Operation 40 9 4 Remote Controller and Its Fuctions 9 4 1 Parts Name of Remote Controlle...

Page 26: ...F Air conditioner Operation select COOL HEAT AUTO DRY Temperature setup Air direction Swing Air volume select AUTO LOW LOW MED MED HIGH ECO ON timer setup OFF timer setup Hi POWER Indoor unit control Command signal generating function of indoor unit operation Calculation function temperature calculation Activation compensation function of indoor fan Cold draft preventive function Timer function In...

Page 27: ...peed is controlled by the previous operation mode 4 DRY operation DRY operation is performed according to the difference between room temperature and the setup temperature as shown below In DRY operation fan speed is controlled in order to prevent lowering of the room temperature and to avoid air flow from blowing directly to persons 1 Detects the room temperature Ta when the DRY operation started...

Page 28: ...t speed shown in Fig 1 2 When setting the fan speed to AUTO on the remote controller revolution of the fan motor is controlled to the fan speed level shown in Fig 2 and Table 1 according to the setup tempera ture room temperature and heat exchanger temperature Fig 1 Fig 2 2 5 Ta C 2 0 1 5 1 0 0 5 Tsc a b c d e M WB 3 4 5 L W6 Air volume AUTO L L M M H W6 L M 2 W9 M H 2 WC Indication Fan speed Fan ...

Page 29: ... c 1 0 d 1 5 e 2 0 f 2 5 g 5 0 5 5 L W9 M WD 1 2 3 H WE H WE Line approximate H and SUL with Tc SUL W2 Stop 46 46 Tc 34 45 45 33 33 33 21 32 32 20 A 4 A 4 A 4 A 4 A 4 A 4 Fan speed MANUAL in starting Fan speed AUTO in stability Fan speed AUTO in starting L L M M H W8 L M 2 WA M H 2 WE Indication Fan speed Fan speed setup HEAT ON AUTO YES NO MANUAL TC 42 C Min air flow rate control Tc 52 51 42 41 L...

Page 30: ...rive circuit of the compressor speed so that electric power of the compressor drive circuit does not exceed the specified value 4 Current release control Set temp Ts Room temp Ta Correction of Hz signal Outdoor temp To Setup of current release point Capacity control continues Detection of electromotive force of compressor motor winding Detection of motor speed and rotor position Inverter output ch...

Page 31: ...pressor speed is kept Q zone When temperature of the indoor heat exchanger drops in the range from 46 C to under 55 C the compressor speed is kept Q zone 2 When temperature of the indoor heat exchanger rises to 55 C or higher the compressor speed is reduced P zone 3 When temperature of the indoor heat exchanger does not rise to 50 C or when it drops below to 46 C the capacity control operation ret...

Page 32: ... lower stop the indoor fan Finish of defrost operation Returning conditions from defrost operation to heating operation 1 Temperature of outdoor heat exchanger rises to 8 C or higher 2 Temperature of outdoor heat exchanger is kept at 5 C or higher for 80 seconds 3 Defrost operation continues for 15 minutes Returning from defrost operation 1 Stop operation of the compressor for approx 50 seconds 2 ...

Page 33: ...ither upper or lower limit position swing operation is performed in width 35 from the limit which the stop position exceeded 3 Swing 2 Louver position in heating operation 2 Air direction adjustment The position is automatically controlled according to the operation The set louver position is stored in memory by the microcomputer The angle of the louver is indicated as the louver closes fully is 0...

Page 34: ...x COOL min 6 x 1 COOL min 30 minutes A B C A B C Time Compressor speed 0Hz A zone aHz B zone a to cHz C zone cHz 0 0 5 1 0 1 5 2 0 2 5 3 0 4 0 5 0 6 0 7 0 8 0 9 0 10 0 11 0 Room temp Set temp 3 5 3 0 2 5 1 5 1 0 TSC 1 0 2 0 5 5 1H 2H 11 10 7 6 5 4 3 2 1 OFF Dry Max 12 11 9 8 10 TA 6 0 6 5 3H 4H 5 0 4 5 4 0 2 0 0 5 0 5 12 9 8 Time Zone Frequency FAN Min Hz Fan speed depend on presetting and can cha...

Page 35: ...ter lamp ON Press RESET button Did you press RESET button for 3 seconds or more Did you press RESET button for 10 seconds or more Switch to AUTO RESTART control YES YES NO NO NO YES Temporary AUTO operation Temporary COOL Operation 10 Discharge temperature control 1 Purpose This function detects error on the refrigerating cycle or error on the com pressor and performs protective control 2 Operatio...

Page 36: ... operation performed prior to the reception of the stop code 3 After the Self Cleaning operation has been performed for the specified period the unit stops operating Unit now performing cooling or dry operation Press STOP button Only timer indicator lights and Self Cleaning operation starts Time set now elapses Operation stops function During Self Cleaning operations The louver opens slightly The ...

Page 37: ...r nearby rooms this operation prevents the remote controller signal from being received simultaneously by both units thus preventing both units from operating 3 Operation The indoor unit on which the remote controller selection has been set to B receives the signal of the remote control ler also set to B At the factory the remote controller selection is set to A on all the indoor units There is no...

Page 38: ... select the hours If the COMFORT SLEEP button is pressed again means cancel comfort sleep mode Heating mode The preset temperature will drop down as show on ECO operation Item No 9 choose the operating hours Repeat Press the COMFORT SLEEP button to pressing to setect thehours If the COMFORT SLEEP button is pressed again means cancel comfort sleep mode 1hr 3hr 5hr or 9hr 1hr 3hr 5hr or 9 hr 15 One ...

Page 39: ... 1 Automatic operation The indoor unit operates in according to the current operation 2 Cooling operation remote controller does not change The indoor unit s fan speed level increase 1 tap The preset temperature drops 1ºC The value of the preset temperature on the 3 Heating operation remote controller does not change The indoor unit s fan speed level increase 1 tap The preset temperature increases...

Page 40: ... Function This 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 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...

Page 41: ...ired to operate at this time press RESET button once more or use the remote controller to turn it on 9 3 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 sy...

Page 42: ...18 Filter reset button FILTER 19 Set clock button CLOCK 20 Check button CHECK 21 Reset button RESET SWING FAN FIX QUIET Hi POWER ONE TOUCH COMFORT SLEEP 4 5 10 21 11 14 16 8 1 2 13 17 20 15 12 3 19 7 6 18 9 9 4 2 Operation of remote control 1 ONE TOUCH Press the ONE TOUCH button for fully automated operation that is customised to the typical consumer preferences in your region of the world The cou...

Page 43: ...misplaced or discharged remote control Pressing the RESET button the unit can start or stop without using the remote control Operation mode is set on AUTOMATIC operation preset temperature is 24 C and fan operation is automatic speed 8 TIMER OPERATION Setting the ON Timer Setting the OFF Timer Press ON Set the desired ON timer Press OFF Set the desired OFF timer Press SET Set the timer Press SET S...

Page 44: ...mds Do not operate ON timer and OFF timer 2 Press and hold the RESET button on the indoor unit for 3 seconds to cancel the Setting operation 3 beep sound but OPERATION lamp does not blink 11 QUIET OPERATION To operate at super low fan speed for quiet operation except in DRY mode Press QUIET Start and stop the operation Note Under certain conditions QUIET operation may not provide adequate cooling ...

Page 45: ...utton for more than 3 seconds while the mark is blinks Press another button to turn off the mark 8 ECO indicator Indicates when the ECO is in activated Press the ECO button to start and press it again to stop operation 9 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 setting is A ther...

Page 46: ...at head wood screw Remote control holder Vinyl tape Apply after carrying out a drainage test Wireless remote control Saddle Extension drain hose Not available provided by installer Shield pipe Attach to the front panel Air filter Hook Installation plate Hook 47 mm or more 120 mm or more 250 mm or more 600 mm or more 100 mm or more 45 mm or more 400 mm or more 600 mm or more Remark Detail of access...

Page 47: ...Gas side 9 52 mm Pipe insulating material polyethylene foam 6 mm thick Putty PVC tapes Part Code A B C Q ty One each 1 One each Secure the outdoor unit with fixing bolts and nuts if the unit is likely to be exposed to a strong wind Use 8 mm or 10 mm anchor bolts and nuts If it is necessary to drain the defrost water attach drain nipple 10 and cap water proof 11 to the bottom plate of the outdoor u...

Page 48: ... name Q ty Remote control holder x 1 Toshiba new IAQ filter x 1 Part No Part No Others Name Owner s manual Installation manual The part marked with asterisk is packaged with the outdoor unit Part name Q ty Flat head wood screw Drain nipple x 1 Cap water proof x 2 Mounting screw 4 x 25 s x 6 3 1 x 16 s x 2 Toshiba new IAQ filter x 1 10 9 8 7 6 5 4 1 2 3 ...

Page 49: ...rt diameter has been changed In order to increase pressure resisting strength hose materials and port size have been changed to 1 2 UNF 20 threads per inch When purchasing a charge hose be sure to confirm the port size As pressure is hight and gasification speed is fast it is difficult to read the indicated value by means of charging cylinder as air bubbles occur The size of opposite sides of flar...

Page 50: ...exposed to direct sunlight or close to a heating source such as a stove Keep the remote control at least 1 m apart from the nearest TV set or stereo equipment This is necessary to prevent image disturbances or noise interference The location of the remote control should be determined as shown below Fig 10 2 1 Top view Indoor unit Reception range Reception range Remote control Remote control Side v...

Page 51: ... brick concrete or similar type walls make 5 mm dia holes in the wall Insert clip anchors for appropriate mounting screws 7 NOTE Secure four corners and lower parts of the installation plate with 4 to 6 mounting screws to install it Installation plate Keep horizontal direction 10 2 3 Electrical work 1 The supply voltage must be the same as the rated voltage of the air conditioner 2 Prepare the pow...

Page 52: ...ard or right side of the front panel for the left or right connection and the slit on the bottom left or right side of the front panel for the bottom left or right connection with a pair of nippers 2 Changing drain hose For leftward connection bottom leftward connection and rearleftward connection s piping it is necessary to change the drain hose and drain cap How to remove the Drain Cap Clip the ...

Page 53: ... within a radius of 30 mm To connect the pipe after installation of the unit figure Fig 10 2 15 NOTE If the pipe is bent incorrectly the indoor unit may unstably be set on the wall After passing the connecting pipe through the pipe hole connect the connecting pipe to the auxiliary pipes and wrap the facing tape around them CAUTION Bind the auxiliary pipes two and connecting cable with facing tape ...

Page 54: ...se sloped downwards NOTE Hole should be made at a slight downward slant on the outdoor side Fig 10 2 19 2 Put water in the drain pan and make sure that the water is drained out of doors 3 When connecting extension drain hose insulate the connecting part of extension drain hose with shield pipe Fig 10 2 20 CAUTION Arrange the drain pipe for proper drainage from the unit Improper drainage can result...

Page 55: ...s up 10 m An allowable height level is up to 8 m 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 exposed to strong wind like a coast or on a high storey of a building secure the normal fan operation using a duct or a wind shield 3 In particularly ...

Page 56: ... 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 or about 15 minutes if the 5 Be save to fully open the packed valves piping length is 20 meters before operation 15 minutes for 20 meters assuming a pump capacity of 27 liters per minute Th...

Page 57: ...0 45 40 60 50 10 10 10 L N 1 2 3 Connecting cable Power cord Earth line Power source Wrong wiring connection may cause some electrical parts burn out Be sure to comply with local cords on running the wire from indoor unit to outdoor unit size of wire and wiring method etc Every wire must be connected firmly This installation circuit breaker must be used specified CAUTION for the power supply line ...

Page 58: ... of the pencil 00 will be shown on the display 4 Press MODE during pushing CHECK B will show on the display and 00 will disappear and the air conditioner will turn OFF The Remote Control B NOTE 1 Repeat above step to reset Remote Control to be A 2 Remote Control A has not A display 3 Default setting of Remote Control from factory is A is memorized Picture Picture 1 2 10 5 3 Test operation To switc...

Page 59: ... case of touching parts on the P C board by hand The new inverter 3DV inverter will be incorporated starting with this unit 3DV 3 shunt Discrete Vector control K The control circuitry has an uninsulated construction No 1 2 3 4 5 Troubleshooting Procedure First Confirmation Primary Judgment Judgment by Flashing LED of Indoor Unit Self Diagnosis by Remote Controller Judgment of Trouble by Every Symp...

Page 60: ...lt in damage to the components Sensor leads Do NOT lay the circuit board assembly flat K Precautions when inspecting the control section of the outdoor unit NOTE A large capacity electrolytic capacitor is used in the outdoor unit controller inverter Therefore if the power supply is turned off charge charging voltage DC280 to 380V remains and discharging takes a lot of time After turning off the po...

Page 61: ...button is operated Increasing of compressor motor speed stops approx 30 seconds after operation started and then compressor motor speed increases again approx 30 seconds after In AUTO mode the operation mode is changed In HEAT mode the compressor motor speed does not increase up to the maxi mum speed or decreases before the temperature arrives at the set temperature Description The OPERATION lamp ...

Page 62: ...splayed when air conditioner operates 2 When item B and C and item B and a part of item E occur concurrently priority is given to the block of item B 3 The check codes can be confirmed on the remote controller for servicing OPERATION Green Flashing display 1 Hz OPERATION Green TIMER Yellow FILTER Orange Flashing display 5 Hz OPERATION Green FILTER Orange Flashing display 5 Hz OPERATION Green TIMER...

Page 63: ...on If there is no fault with a code the indoor unit will beep once Beep and the display of the remote controller will change as follows The TIMER indicator of the indoor unit flashes continuously 5 times per 1 sec Check the unit with all 52 check codes to as shown in Table 11 4 1 Press ON or OFF button to change the check code backward If there is a fault the indoor unit will beep for 10 seconds B...

Page 64: ...omputer returns the initial status However the check codes are not deleted even if the power supply is turned off because they are stored in the fixed memory 3 After servicing press CLR button under check mode status and then send the check code 7F to the indoor unit The error code stored in memory is cleared Table 11 4 1 Block distinction Operation of diagnosis function Block Indoor P C board etc...

Page 65: ... 4 way valve operation Block Outdoor P C board Not displayed Outdoor P C board Others including compressor Operation of diagnosis function Cause of operation Inverter over current protective circuit operates Short time Position detect circuit error or short circuit between windings of compressor Current detect circuit error Being out of place disconnection or short circuit of the outdoor heat exch...

Page 66: ...er Is voltage DC12V or 5V indicated on rear of indoor control board normal Does transmission mark on remote controller flash normally and is its signal transmitted properly Item by symptoms Operation Check Item Considerable principle cause Measures Parts R01 C01 C02 R64 C27 DB01 Remote controller is defective Refer to 5 Troubleshooting for remote controller Parts of a power supply circuit defectiv...

Page 67: ...or fan operate Fan motor operates normally Replace main P C board Replace YES YES YES Motor circuit D301 IC31 Q301 12V power circuit T01 failure Replace the fan motor YES NO Replace the P C board NO NO NO Turn OFF the power Change airflow level to HIGH Change airflow level to HIGH Is it possible to YES rotate cross flow fan by hand properly NO Turn OFF the power bearing NO Control P C board failur...

Page 68: ...e resistance value of each winding coil Use a thin test rod of Judgment of Trouble by Every Symptom AFN 220 20 4D Do not disconnect the connector while the fan motor is rotating For P C board side proceed to the item Only indoor fan does not operate 1 3 5 1 2 3 2 1 3 2 1 3 2 1 3 2 1 3 CN31 CN33 P C board WHI BLK RED BLK RED WHI BLU PUR GRY BLU PUR GRY Resistance value Position P C board Between 3 ...

Page 69: ...e 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 transistor 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 Battery life Replace the batteries Dose the...

Page 70: ...ried Confirm that transmission from indoor unit to outdoor unit is correctly performed based upon the follow ing diagram NOTE Measurement should be performed 2 minutes and 30 seconds after starting of the operation Be sure to prepare a diode for judgment Normal time Voltage swings between DC15 and 60V Inverter Assembly check 11 5 1 Abnormal time Voltage does not vary 2 Outdoor unit stops in a litt...

Page 71: ...ervice port and add gas if pressure is low Is connecter of coil connected to inverter Is coil of the pulse motor valve P M V correctly set Existence of condensation at outlet of P M V If there is condensation at outlet 1 4 inch Ø6 35mm valve side the valve is clogged Are temp sensors of indoor outdoor units correctly set to the holder NOTE The temperature sensors which are used to control pulse mo...

Page 72: ... with Q R or S Summary If fuse was blown be sure to check the electrolytic capacitor and diode block DB01 Connect discharge resistance approx 100Ω 40W or soldering iron plug between terminals of the electro lytic capacitor 500µF or 760µF of C14 with printed CAUTION HIGH VOLTAGE on P C board OK if 500µF or 760µF DC280 to 380V Remove CN300 while pushing the part indicated by an arrow because CN300 i...

Page 73: ...e Main Parts 11 8 1 How to Check the P C Board Indoor Unit 1 Operating precautions 1 When removing the front panel or the P C board be sure to shut off the power supply breaker 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 whole housing Do not pull at the lead wire 2 Inspe...

Page 74: ...r or not all indicators OPERATION TIMER are lit for 3 seconds and they return to normal 3 seconds later 1 Check whether or not the compressor operates 2 Check whether or not the OPERATION indicator flashes 1 Check whether or not the compressor operates 2 Check whether or not the OPERATION indicator flashes 1 Check it is impossible to detect the voltage AC120V or higher voltage between red and blac...

Page 75: ...0 30 40 50 Resistance value k Temperature C TD Discharge temp sensor TA Room temp sensor TC Heat exchanger temp sensor TO Outdoor temp sensor TE Outdoor heat exchange temp sensor TA TC TO TE TD 1 Sensor characteristic table 12V GND 5V 12V 11 8 2 P C Board Layout ...

Page 76: ...5 C 30 C 40 C No 1 Part name Compressor Model DA89X1C 23EZ Checking procedure Red White Black Measure the resistance value of each winding by using the tester Position Red White White Black Black Red Resistance value Under 20ºC 1 1Ω 2 Outdoor fan motor Model WLF 240 20A 1 3 Measure the resistance value of winding by using the tester N Red White C1 5 mF 450V Black Position Resistance value White Bl...

Page 77: ...show in continuity test by the tester C12 C13 C14 500µF or 760µF 400V 2 Converter module 1 Turn OFF the power supply breaker 2 Discharge all three capacitors completely 3 Check that the normal rectification characteristics are shown in continuity test by the tester Case that product is good Pointer swings once and returns slowly When performing test once again under another polarity the pointer sh...

Page 78: ...it failure inside of the outdoor fan motor 4 Motor drive circuit failure of the outdoor P C board 3 How to simply judge whether outdoor fan motor is good or bad NOTE However GND circuit error inside of the motor may be accepted in some cases when the above check is performed When the fan motor does not become normal even if P C board is replaced replace the outdoor fan motor If the resistance valu...

Page 79: ...r holder 5 Remove the screw for the ground connection remove the screw for the electrical part box Then remove the LED and the electrical part box from the main unit How to mount the electrical part 1 To put back the electrical part box lock it to the upper hook of the back body 2 Tighten the screws on the electrical part box 3 Connect the 3 connectors and arrange the wiring same as original condi...

Page 80: ...an motor Notice To assemble cross flow fan and fan motor to the unit please turn the fan motor unit the center of its terminal meets the top position of band motor R Fix the cross flow fan 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 7 mm 1 Remove the front panel electrical part horizontal louver heat exchanger and the cros...

Page 81: ... No Part name Common procedure Procedure 1 Turn the power supply off to stop the operation of air conditioner 2 Remove the front panel Remove the 2 fixing screws 3 Remove the electrical part base Remarks 12 2 Microcomputer ...

Page 82: ...net 2 After connecting 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 squar...

Page 83: ...scharge and voltage remains depending on the malfunction state in some cases NOTE This capacitor has mass capacity Therefore it is dangerous that a large spark generates if short circuiting between the e d polarities with screwdriver etc for discharging 4 Perform the work of 2 5 Remove the screw ST1T 4 x 10s 1 pc fixing the main body and the inverter box 6 Remove the lead wire from the holder on t...

Page 84: ... Note 1 As the connector has a stopper release the housing lock when removing Note 2 Hold the housing resin part with stopper and pull out to remove 2 Remove the control board assembly from the inver ter box Note 2 Remove the claw of the board support fixed to the inverter board and remove upwards holding the heat sink 3 Remove the three screws fixing the heat sink and control board assemble 4 Att...

Page 85: ...d end splice 1 Perform work of item 1 of 1 1 of 2 2 Extract refrigerant 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...

Page 86: ...n guard side faces downwards 3 Remove the hooking claws by pushing a minus screwdriver according to the arrow mark in the right figure and remove the fan guard 2 Attachment 1 Insert the claws of the fan guard in the hole 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...

Page 87: ...ective tube is used 10 Fix the sensor again NOTES 1 Store the joint part of the sensor and the connector in the electric parts box 2 Never joint them near the thermal sensor part Otherwise it would cause insulation inferiority because of dew drops 3 When replacing the sensor using the colored protective tube wind the color tape matching the color of that tube Replacement of temperature sensor for ...

Page 88: ... 1 Indoor Unit E Parts Assy Location Part Location Part No No No No 401 43T60365 TERMINAL BLOCK 3P 405 43T69612 DISPLAY UNIT 403 43T69319 TEMPERATURE SENSOR 410 43T62003 CORD CLAMP 404 43T69320 TEMPERATURE SENSOR 411 43T69824 PC BOARD Description Description ...

Page 89: ...205 43T09392 HORIZONTAL LOUVER 221 43T39321 MOTOR BAND RIGHT 206 43T70313 HOSE DRAIN 222 43T21409 FAN MOTOR 207 43T79301 CAP DRAIN 224 43T82309 INSTALLATION PLATE 208 43T21402 MOTOR STEPPING 225 43T66315 WIRELESS REMOTE CONTROLLER 209 43T44387 REFRIGERATION CYCLE ASSY 226 43T83305 HOLDER REMOTE CONTROL 210 43T47353 PIPE SUCTION 227 43T62326 TERMINAL COVER 211 43T47355 PIPE SUCTION 228 43T60317 COR...

Page 90: ...L COVER 21 43T00448 FIXING PLATE VALVE 6 43T19341 FIN GUARD 22 43T42331 BASE PLATE ASSEMBLY 7 43T47308 CAPILLARY TUBE 1 0 DIA 23 43T79305 DRAIN NIPPLE 8 43T46366 VALVE PACKED 9 52 DIA 24 43T46351 REACTOR 9 43T47332 BONNET 9 52 DIA 25 43T46343 4 WAY VALVE 10 43T46332 VALVE PACKED 6 35 DIA 26 43T63320 4 WAY VALVE COIL ASSEMBLY 11 43T47331 BONNET 6 35 DIA 27 43T04305 PARTITION 12 43T21400 FAN MOTOR 2...

Page 91: ... Location Part No No No No 701 43T62320 HEATSINK 705 43T60377 TEMPERATURE SENSOR 702 43T69819 PC BOARD 706 43T50304 SENSOR HEAT EXCHANGER 703 43T60392 TERMINAL 5P 707 43T62313 BASE PLATE PC 704 43T60326 FUSE 708 43T55325 CAPACITOR PLASTIC FILM Description Description ...

Page 92: ...FILE NO SVM 03008 87 TOSHIBA CARRIER CORPORATION ...

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