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Toshiba RAS-10UAV-E, Service Manual

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Toshiba RAS-10UAV-E Service Manual Download Page 54

FILE NO. SVM-02007

– 53 –

DC

P.C. board

CN10

6 (Blue)

5 (Yellow)

4 (White)

3 (Black)

2 –

1 (Red)

Black

Yellow

(4) 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.

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

Under DC 1.0V

Replace P.C. board.

Replace motor.

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

Motor is defective.

P.C. board is defective.

Summary of Contents for RAS-10UAV-E

Page 1: ...SERVICE MANUAL AIR CONDITIONER SPLIT WALL TYPE FILE NO SVM 02007 RAS 10UKV E RAS 10UAV E Apr 2002 ...

Page 2: ...ON OF ELECTRICAL PARTS 5 1 Indoor Unit 5 2 Outdoor Unit 6 REFRIGERANT CYCLE DIAGRAM 6 1 Refrigerant Cycle Diagram 6 2 Operation Data 7 CONTROL BLOCK DIAGRAM 7 1 Indoor Unit 7 2 Outdoor Unit Inverter Assembly 8 OPERATION DESCRIPTION 8 1 Outlined of Air Conditioner Control 8 2 Description of Operation Circuit 8 3 Temporary Operation 8 4 Auto Restart Function 8 5 Hi POWER Mode Hi POWER button on the ...

Page 3: ...mptom 10 6 Check Code 1C Miswiring in indoor outdoor units and 1E 10 7 How to Diagnose Trouble in Outdoor Unit 10 8 How to Check Simply the Main Parts 10 9 How to Simply Judge Whether Outdoor Fan Motor is Good or Bad 11 HOW TO REPLACE THE MAIN PARTS 11 1 Indoor Unit 11 2 Microcomputer 11 3 Outdoor Unit 12 EXPLODED VIEWS AND PARTS LIST 12 1 Indoor Unit E Parts Assy 12 2 Indoor Unit 12 3 Outdoor Uni...

Page 4: ... 530 Width mm 660 Depth mm 240 Net weight kg 28 Compressor Motor output W 750 Type Single rotary type with DC inverter variable speed control Model DA89X1F 20D Fan motor output W 18 Air flow rate Cooling Heating m3 h 1300 1300 Piping connection Type Flare connection Indoor unit Liquid side 6 35 Gas side 9 52 Outdoor unit Liquid side 6 35 Gas side 9 52 Maximum length Per unit m 10 Maximum chargeles...

Page 5: ...ions Indoor DB 20 C Outdoor DB 7 C WB 6 C Air flow High Pipe lengthh 5m 230V Current A Compressor speed rps 50 55 60 65 70 75 80 85 90 95 100 105 32 33 34 35 36 37 38 39 40 41 42 43 a Conditions Indoor DB 27 C WB 19 C Indoor air flow High Pipe lengthh 5m Capacity ratio Outdoor temp C Current Limited Start 10 20 30 40 50 60 70 80 90 100 110 120 10 9 8 7 6 5 4 3 2 1 0 1 2 3 4 5 6 7 8 9 10 Capacity r...

Page 6: ...able 2 2 1 Never use copper pipes thinner than 0 8 mm even when it is avail able on the market 2 REFRIGERANT R 410A This air conditioner adopts the new refrigerant HFC R 410A which does not damage the ozone layer The working pressure of the new refrigerant R 410A is 1 6 times higher than conventional refrigerant R 22 The refrigerating oil is also changed in accordance with change of refrigerant so...

Page 7: ...hat a clamp bar and copper pipe have been cleaned By means of the clamp bar perform the flare processing correctly Use either a flare tool for R 410A or conven tional flare tool Flare processing dimensions differ according to the type of flare tool When using a conven tional flare tool be sure to secure dimension A by using a gauge for size adjustment Fig 2 2 1 Flare pr ocessing dimensions 2 2 1 P...

Page 8: ...to 2 0 5 8 15 88 1 0 0 to 0 5 0 5 to 1 0 1 0 to 2 0 Table 2 2 4 Dimensions related to flare pr ocessing for R 22 Nominal diameter Outer diameter mm Thickness mm Flare tool for R 410A clutch type Dimension mm A B C D 1 4 6 35 0 8 9 1 9 2 6 5 13 17 3 8 9 52 0 8 13 2 13 5 9 7 20 22 1 2 12 70 0 8 16 6 16 0 12 9 23 26 5 8 15 88 1 0 19 7 19 0 16 0 25 29 Table 2 2 5 Flare and flare n ut dimensions for R ...

Page 9: ... nut may crack and may be made non removable When choosing the tightening torque comply with values designated by manufacturers Table 2 2 7 shows reference values Note When applying oil to the flare surface be sure to use oil designated by the manufacturer If any other oil is used the lubricating oils may deteriorate and cause the compressor to burn out Tightening torque of torque Nominal Outer di...

Page 10: ...n be used with for R 410A equipment can conventional refrigerant be used 1 Flare tool Pipe flaring Yes Note 1 2 Copper pipe gauge Flaring by for adjusting projection conventional flare Yes Note 1 Note 1 margin tool 3 Torque wrench Connection of Yes For 12 70 flare nut 4 Gauge manifold 5 Charge hose 6 Vacuum pump adapter Vacuum evacuating Yes 7 Electronic balance for Refrigerant charge Yes refriger...

Page 11: ...ter does not return Set the refrigerant cylinder to the electronic balance connect the connecting hose to the cylinder and the connecting port of the electronic balance and charge liquid refrigerant For refrigerant charging see the figure below 1 Never charge refrigerant exceeding the specified amount 2 If the specified amount of refrigerant cannot be charged charge refrigerant bit by bit in COOL ...

Page 12: ...oin 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 strength do not use it for refrigerant pi...

Page 13: ...ical knowledge it must be performed by a person qualified In order to prevent the oxide film from occurring in the pipe interior during brazing it is effective to proceed with brazing while letting dry Nitrogen gas N2 flow Never use gas other than Nitr ogen gas 1 Brazing method to prevent oxidation 1 Attach a reducing valve and a flow meter to the Nitrogen gas cylinder 2 Use a copper pipe to direc...

Page 14: ...system 6 60 275 790 208 48 48 26 45 190 40 32 64 590 320 620 235 235 215 215 90 90 275 45 150 150 160 160 120 80 53 6 60 Hanger Hanger Hanger Hanger Hanger Drain hose 0 54m Connecting pipe 0 43m Flare 6 35 For stud bolt 8 10 For stud bolt 6 Installation plate outline Center line Minimum distance to ceiling 170 or more Minimum distance to ceiling 170 or more 65 or more Minimum distance to ceiling W...

Page 15: ... 5 265 6 Hole B Detail Drawing Front Leg 50 36 R 15 660 265 273 5 6 Hole 11x14 Hole A B Z View 97 25Drain outlet 2 11x14 hole for 8 10 anchor bolt Fan guard 530 Liquid side Flare 6 35 Gas side Flare 12 7 Service port 126 48 325 100 or more 100 or more 600 or more 600 or more Installation dimension 600 Air inlet Air outlet 4x 11x14 Long holes for 8 10 anchor bolt ...

Page 16: ...uctuating voltage between 2 and 3 15 60VDC Check if the fuse blows out Check the R04 of the varistor Check the voltage at the No 4 pin on CN13 connector of the infrared receiver Check the transformer and the power supply circuit of the rated voltage Check the voltage at the white lead of the louver motor Check the transformer and the power supply circuit of the rated voltage Check the voltage at t...

Page 17: ...MOTOR RELAY CN300 CN500 RED FM F04 FUSE T3 15A VARISTOR POWER SUPPLY 220 240V 50 60Hz TO INDOOR UNIT F01 FUSE 15A CN01 BLK ORN WHI CN03 CN02 CN701 REALY COIL FOR 4 WAY VALVE 1 2 1 2 1 2 1 2 TE TO 3 2 1 L N IGBT MODULE EU BV EV BW EW BX BY BZ P14 P13 1 3 5 1 3 5 1 2 3 1 2 3 WHI BLK CM P C BOARD MCC 866 COLOR IDENTIFICATION BLK BLACK BLU BLUE RED RED GRY GRAY PNK PINK GRN GREEN WHI WHITE BRW BROWN O...

Page 18: ... Parts name Model name Rating 1 SC coil Noise filter L01 ADR2510 020T4B 10A 2mH Primary side DC280V Secondary 2 DC DC transformer SWT 43 side 7 5V x 1 13V x 1 26 5V x 3 16V x 1 15V x 1 3 Reactor CH 51 Z T L 19mH 10A 4 Outside fan motor UE6 21SS5PA 18W 5 Fan control relay AJQ1341 Coil DC12V Contact AC250V 2A 6 Outside air temp Inverter attached 10k 25 C sensor TO sensor 7 Heat exchanger temp Invert...

Page 19: ...e attaching port Vacuum pump connecting port P Sectional shape of heat insulator Outer dia 6 35mm Thickness 0 80mm Deoxidized copper pipe 4 way valve VT7101D Outer dia 9 52mm Thickness 0 80mm INDOOR UNIT Cross flow fan Temp measurement Muffler TD Compressor DA89X1F 20D Split capillary Refrigerant amount 0 64kg NOTE Gas leak check position Refrigerant flow Cooling Refrigerant flow Heating Outdoor h...

Page 20: ...Temperature condition C Indoor Outdoor 27 19 35 Standard pressure P MPa 1 1 Model name 10UKV E Heat exchanger pipe temp T1 C T2 C 13 5 49 Indoor fan mode High Outdoor fan mode High Compressor revolution rps 54 Temperature condition C Indoor Outdoor 20 7 6 Standard pressure P MPa 2 4 Model name 10UKV E Heat exchanger pipe temp T1 C T2 C 40 0 Indoor fan mode High Outdoor fan mode High Compressor rev...

Page 21: ...rature Sensor Infrared Rays Signal Receiver Initiallizing Circuit Clock Frequency Oscillator Circuit Power Supply Circuit Noise Filter From Outdoor Unit M C U Functions Louver Control 3 minute Delay at Restart for Compressor Motor Revolution Control Processing Temperature Processing Timer Serial Signal Communication Louver ON OFF Signal Louver Driver Serial Signal Transmitter Receiver Serial Signa...

Page 22: ...AC DC P C B MCC 866 Over current sensor Gate drive circuit Rotor position detect circuit Relay 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 ...

Page 23: ...ature measurement by outdoor heat exchanger and control for 4 way valves and outdoor fan 8 OPERATION DESCRIPTION 8 1 Outlined of Air Conditioner Control This air conditioner is a capacity variable type air conditioner which uses DC motor for the indoor fan motor and AC motor for the outdoor fan motor And the capacity proportional control compressor which can change the motor speed in the range fro...

Page 24: ... heating capacity is varied by changing compressor motor speed The inverter changes compressor motor speed by changing AC 220 240V power to DC once and controls capacity by changing supply power status to the compressor with transistor module includes 6 transistors The outline of the control is as follows The revolution position and revolution speed of the motor are detected by detecting winding e...

Page 25: ...IGH 2 Table 8 1 2 Normal Powerful Fan mode Motor Air flow Motor Air flow Remote speed volume speed volume control rpm m3 h rpm m3 h Cooling H HIGH 1 140 535 1 140 535 and M 1 100 510 1 140 535 Fan only MED 1 070 495 1 100 510 M MED 1 000 510 1 060 490 LOW 900 395 960 430 L 860 370 880 380 L LOW 810 340 860 370 L 750 305 810 340 Heating H HIGH 1 250 600 1 250 600 M 1 200 600 1 250 600 MED 1 150 540...

Page 26: ...s the outdoor fan relay R01 R02 and R03 and the compressor motor speed according to the operation command signal sent from the indoor unit When FAN button is set to AUTO the indoor fan motor operates as shown in Fig 8 2 2 When FAN button is set to LOW LOW MED MED HIGH the motor oper ates with a constant air flow NOTE 1 The values marked with 1 are calculated and controlled by the difference in mot...

Page 27: ...tarted Air flow rate To 32 C To 32 C after 1H running H 54 54 M 48 49 MED 41 44 M L L L 35 39 L L UL SUL 28 28 Fig 8 2 4 NOTE 1 The values marked with 1 are calculated and controlled by the difference in motor speed between 32 rps and 22 rps 3 Current release control The input current of compressor and outdoor fan motor Precisely inverter main circuit control section which occupy most of air condi...

Page 28: ...re is below 24 C Room temp Set temp FAN AUTO 0 5 1 1 5 2 5 2 1 2 3 5 0 5 5 0 Set temperature M HIGH LOW A 4 A 8 A 4 A 8 46 45 34 33 33 32 21 20 2 2 FAN AUTO Starting of FAN Manual Approximate revolution speed of HIGH and SUL linear by Tc HIGH SUL SUL NOTE 1 Stop 8 2 3 DRY operation MODE button on the remote control is set the Dry operation Once the setting is made the operation mode is memorized i...

Page 29: ...es passed after operation start When 12 to 25 minutes passed after operation start and room temperature is 3 C or lower than set temperature Room temperature Set temperature 4 C When 12 to 25 minutes passed after operation start and room temperature is higher than set temp 3 C When 25 minutes or more passed after operation start Room tempera ture Set tem perature 3 5 C Fig 8 2 8 4 Defrost control ...

Page 30: ...peration 1 As shown in Fig 8 2 9 the operation mode COOL DRY HEAT is selected according to the outside temperature and room temperature when the operation has started The operation in Fan mode continues until an operation mode is selected If the room temperature is 20 C or higher when AUTO operation started within 2 hours after HEAT operation had stopped select an operation mode after Fan operatio...

Page 31: ...door fan speed Low When the TEMPORARY operation button is pushed again the operation stops Auto Restart function is unavailable 8 3 1 Temporary auto operation When the TEMPORARY button is pushed the Auto operation with set temperature fixed at 25 C starts Controlling is same as that of Auto operation by the remote controller When the TEMPORARY button is pushed again the operation stops During Temp...

Page 32: ...n 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 button once more or use the remote control to turn it off When the unit is on standby Not operating When the unit is in operation Operation Motions Push...

Page 33: ...ot 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 After approx three seconds The unit beeps three times The lamp changes from and continues to operate orange to green If the unit is not required to operate at this time push TEMPORARY button once more or use the remote control to turn it off When ...

Page 34: ...he horizontal louver returns automatically 3 Heating operation The preset temperature increases 2 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 retur...

Page 35: ...eiving beep is heard 8 8 8 8 8 Off timer button OFF Press this button to set the OFF timer 9 9 9 9 9 On timer button ON Press this button to set the ON timer Reserve button SET Press this button to reserve time settings A receiving beep is heard Cancel button CLR Press this button to cancel ON timer and OFF timer A receiving beep is heard High power button Hi POWER Press this button to start the h...

Page 36: ...peed levels LOW LOW MED MED HIGH can be indicated Indicates AUTO when the operating mode is either AUTO or Dry 6 6 6 6 6 TIMER and clock time display The time set for timer operation or clock time is indicated The present time is always indicated except for TIMER operation 7 7 7 7 7 Hi POWER display Indicates when the Hi POWER operation starts Press the Hi POWER button to start and press it again ...

Page 37: ...RE 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 BE...

Page 38: ...ing the wireless remote control With the remote control cover open load the batteries supplied correctly observing their polarity 2 Wireless remote control 3 Batteries Cover As shown in the figure hang power cord and connecting cable downward and take out it along piping connection port The auxiliary piping can be connected the left rear left rear right right bottom right or bottom left Left Rear ...

Page 39: ...Applicable to R 22 model Changes Gauge manifold Charge hose Electronic balance for refrigerant charging Torque wrench nominal diam 1 2 5 8 Flare tool clutch type Gauge for projection adjustment Vacuum pump adapter Gas leakage detector As pressure is high it is impossible to measure by means of conventional gauge In order to prevent any other refrigerant from being charged each port diameter has be...

Page 40: ...ances or noise interference The location of the remote control should be determined as shown below 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 Top view Indoor unit Axial distance Reception range Reception range Remote control Indoor unit Remote co...

Page 41: ...e 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 the local cords into the pipe hole on the wall 4 Take out the connecting cable through the cable slot on the rear panel so that it protrudes about 15 cm from the front 5 Insert the connecting cable fully into the terminal block and sec...

Page 42: ...n 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 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 Instal...

Page 43: ...e with a distance of 85mm from the incused line Flare at indoor unit side Flare at outdoor unit side 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 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 areas insta...

Page 44: ... Check places for indoor unit Electric parts cover Fig 9 3 8 9 3 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 o...

Page 45: ...emains and discharging takes a lot of time After turning off the power source if touching the charging section before discharging an electrical shock may be caused Discharge the electrolytic capacitor completely by using soldering iron etc Discharging method 1 Remove the inverter cover plating by opening four mounting claws 2 As shown below connect the discharge resistance approx 100Ω40W or plug o...

Page 46: ...ature No Operation of air conditioner Descriptions The OEPRATION lamp of the indoor unit flashes when power source is turned on If START STOP button is operated once flashing stops Flashes also in power failure The compressor does not operate while compressor restart delay timer 3 minutes timer operates The same phenomenon is found after power source has been turned on because 3 minutes timer oper...

Page 47: ...controller for servicing Table 10 3 1 Lamps Self diagnosis 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 FAN ONLY lamps are blinking H OPERATION TIMER and FAN ONLY lamps are blinking Power failure when the power su...

Page 48: ... 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 4 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 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 ...

Page 49: ...n continues Displayed when error is detected Displayed when error is detected Displayed when error is detected Displayed when error is detected Flashes when trouble is detected on Return serial signal and normal status when signal is reset Flashes when trouble is detected on Operation command signal and normal status when signal is reset 1 Check the room temp sensor 2 When the room temp sensor is ...

Page 50: ... serial signal and normal status when signal is reset Displayed when error is detected Displayed when error is detected Displayed when error is detected Even if trying operation again all operations stop immediately Replace P C board 1 Even if connecting lead wire of compres sor is removed position detect circuit error occurred Replace P C board 2 Measure resistance between wires of compressor and...

Page 51: ...computer is defective Replace main P C board Refer to Primary check or this problem is one step short of power P C board block Is DC 310 340V suppalied to primary side of transfer switch Are DC 15V DC 12V and DC 7V supplied to secondary side of transfer switch Turn off breaker once and turn it on again after removing motor Transfer switch IC IC01 for power supply or fan motor is defective Replace ...

Page 52: ...on though Indoor P C board is replaced Confirmation procedure Turn on power supply Does operation lamp flash Is wired connectly to white and black lead wires of terminal block Correct wirng To item of Power supply is not turned on YES NO NO YES ...

Page 53: ...nnector CN10 Turn off indoor unit and remove connector from motor Then press START STOP button on remote control to stop blinking lamp on indoor unit Replace indoor fan motor Replace main P C board Is it possible to detect DC 15V between 4e and 3d of motor connector CN10 Turn off indoor unit and remove connector from motor Then start to operate indoor unit with remote control Start to operate the ...

Page 54: ...r 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 Measure voltage between 2 GND BLACK and 3 V line YELLOW of motor...

Page 55: ...icated Does indoor unit start to operate by automatic restart function Does radio sound is affected by remote control when a signal is transmitted at distance of 5 cm from radio Does indoor unit beep and operate Avoid direct sunlight Keep indoor unit away from thyristor fluorescent light P C board is defective Replace P C board Replace batteries Normal operation Replace remote control Remote contr...

Page 56: ...outdoor unit stops 10 to 20 minutes after operation started and 10 minutes or more are required to restart the unit 2 If the unit stops once it dose not operate until the power is turned on again 3 The outdoor unit stops 10 minutes to 1 hour after operation started and an alarm is displayed Discharge temp error check code 03 1E Sensor temp error check code 02 1C Terminal block on indoor side Red W...

Page 57: ...d the outdoor fan It takes approx 7 seconds for positioning of the valve and sound ticktack hitting sound to stopper is heard for approx 0 5 seconds at least of that period As the sound is low check sound by using screwdriver etc Are temp sensors of indoor outdoor units correctly set to the holder NOTE The temperature sensors which are used to control electronic control valve include indoor heat e...

Page 58: ...r and compressor Check whether 15A fuse on the control board assembly is blown or not F01 Turn on power breaker and operate the air conditioner in COOL mode by short circuit of the timer Measure terminal voltage of the electrolytic capacity 500mF 400WV x 2 After operation turn off the power breaker after 2 minutes 20 seconds passed and discharge the electrolytic capacity by soldering iron Check vo...

Page 59: ... Check Simply the Main Parts 10 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 connec tors on the P C board hold the whole housing Do not pull at the ...

Page 60: ...voltage 1 Between CN23 and CN24 DC 15 60V Check whether or not all lamps OPERATION TIMER PRE DEF FILTER and Hi POWER are indicated for 3 seconds and they return to normal 3 seconds later 1 Check whether or not the com pressor operates 2 Check whether or not the OPERATION lamp flashes 1 Check whether or not the compressor operates 2 Check whether or not the OPERATION lamp flashes 1 Check it is impo...

Page 61: ... For the Top View refer to page 66 TD Discharge temp sensor TA Room temp sensor TC Heat exchanger temp sensor TO Outdoor temp sensor TE Outdoor heat exchanger temp sensor TS Suction temp sensor TD 100 90 80 70 60 50 40 30 20 10 0 TA TC TO TE TS 10 0 20 30 40 Temperature C Resistance value kW 50 ...

Page 62: ...to 5 10 8 4 Outdoor unit 1 Compressor Model DA89X1F 20D 2 Outdoor fan motor Model UE6 21SS5PA 3 Compressor thermo Bimetal type Model PW 2AL 4 Outdoor temperature sensor TO outdoor heat exchanger temperature sensor TE No Part name Checking procedure Measure the resistance value of each winding by using the tester Under 20 C Measure the resistance value of winding by using the tester For details ref...

Page 63: ...ow off 6 Check that the tester shows the normal charging characteristics in continuity test C12 C13 500µF 400V 1 Turn OFF the power supply breaker 2 Discharge all four capacitors completely 3 Check that the normal rectification characteristics are show in continuity test by the tester Case that product is good Pointer swings once and returns slowly When performing test once again under another pol...

Page 64: ...door fan motor 3 Motor drive circuit error 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 the outdoor fan motor If the resistance value between the connector CN300 Motor wi...

Page 65: ...ound connection remove the 2 screws for the electrical part box and remove the screw from the LED unit Then remove the LED unit 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 2 screws on the electrical part box 3 Connect the 3 connectors and arrange the wiring same as ori...

Page 66: ... of the cross flow fan then separate the fan and the fan 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 lowest point of band motor R point A 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 mm 1 Remove the front panel e...

Page 67: ...top the operation of air conditioner 2 Remove the front panel Remove the 4 fixing screws 4 x 14s 3 Remove the Electric parts cover 1 Common procedure 11 2 Microcomputer Replace the thermal fuse terminal block microcomputer ass y and the P C board ass y P C board layout MCC 867 Top View ...

Page 68: ...e 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 position...

Page 69: ...ge 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 the te...

Page 70: ...e 3 Remove the claw of the board support fixed to the inverter board and remove upwards holding the heat sink 4 Remove the three screws fixing the heat sink and control board assembly 5 Attach the new control board assembly Note 4 When attaching the new control board assembly insert the P C board into the guide rail groove correctly 1 Perform work of item 1 of 1 1 of 2 and 5 of 3 2 Remove the fixe...

Page 71: ... end splice 1 Perform work of item 1 of 1 1 of 2 3 and 5 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 touc...

Page 72: ...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 12 positions by your hand and fix the claws Requirement This completes all the attaching work Check that all the hooking claws are fixed ...

Page 73: ...ective tube when colored protective 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 Replaceme...

Page 74: ...FILENO SVM 02007 73 P C board layout MCC 866 ...

Page 75: ...Part Description No No 401 43T69319 Temperature Sensor TC 10kΩ 25 C 402 43T60001 Terminal 2P AC300V 20A 403 43T69320 Temperature Sensor TA 10kΩ 25 C Location Part Description No No 404 43T62003 Cord Clamp 405 43T69079 P C Board ASSY WRS LED 406 43T69321 P C Board MCC 867 406 404 401 403 402 405 ...

Page 76: ...06 Holder Plate EVA Seal 218 43T79302 Guide Drain Location Part Description No No 219 43T22002 Bearing 220 43T39301 Base Bearing 221 43T20302 Cross Flow Fan 222 43T39302 Band Motor L 223 43T21327 Motor Fan ICF 340 30 2 DC 340V 224 43T39303 Band Motor R 225 43T82301 Plate Installation 226 43T69306 Remote Controller Wireless WH H1UE 227 43T83003 Holder Remote Controller 228 43T85325 Owner s Manual 2...

Page 77: ...DIA 12 43T21326 Motor Fan UF6 21SS5PA 13 43T47001 Nut Flange Location Part Description No No 14 43T19312 Handle 15 43T49001 Cushion Rubber 16 43T63005 Holder Thermostat 17 43T54304 Thermostat Bimetal PW2AL 18 43T41318 Compressor DA89XIF 20D 19 43T62305 Cover Packed Valve 20 43T00364 Cabinet Upper Assy 21 43T63301 Fixing Plate Valve Assy 22 43T42302 Base Assy 23 43T79305 Nipple Drain 24 43T46313 Re...

Page 78: ... 43T69316 P C Board MCC 866 704 43T62308 Invertor Box 705 43T60027 Terminal Box 6P 15A 250V Location Part Description No No 706 43T60315 Fuse 15A 250V 707 43T50303 Temperature Sensor TE 10KΩ 25 C 707 43T50303 Temperature Sensor TO 10KΩ 25 C 12 4 Outdoor Unit E Parts Assy 703 704 705 Sensor 6 702 701 706 707 ...

Page 79: ...FILE NO SVM 02007 78 TOSHIBA CARRIER CORPORATION ...

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