Toshiba RAS-10NAV-A Service Manual Download Page 2

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FILE NO. SVM-05026

CONTENTS

1. SPECIFICATIONS

1-1. Specifications

2. REFRIGERANT R-410A

2-1. Safety During Installation/Servicing
2-2. Refrigerant Piping Installation
2-3. Tools
2-4. Recharging of Refrigerant
2-5. Brazing of Pipes

3. CONSTRUCTION VIEWS

3-1. Indoor Unit
3-2. Outdoor Unit

4. WIRING DIAGRAM

4-1. Indoor Unit
4-2. Outdoor Unit

5. SPECIFICATION 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 DIA

GRAM

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.

Filter Check Lamp

8-6.

Remote control

9. INSTALLA TION PROCEDURE

9-1. Safety Cautions
9-2. INDOOR UNIT
9.3. OUTDOOR UNIT

Operation Characteristic Curve

Summary of Contents for RAS-10NAV-A

Page 1: ...SERVICE MANUAL AIR CONDITIONER SPLIT WALL TYPE FILE NO SVM 05026 RAS 10NKV E RAS 10NAV E June 2005 RAS 10NKV A RAS 10NAV A ...

Page 2: ...it 5 SPECIFICATION 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 Filter Check Lamp 8 6...

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: ...tary type with DC inverter variable speed control COP Cooling Heating DA89X1F 23F 20 1320 1320 Flare connection Operation noise 6 35 Indoor 9 52 6 35 9 52 10 10 8 Medium Cooling Heating R410A 0 64 3 Wires includes earth Outdoor 4 Wires includes earth 21 32 Up to 27 C Low Cooling Heating 15 43 10 24 Power supply Outdoor Cooling Heating Indoor unit Unit model Dimension Height Width Depth Net weight ...

Page 5: ...Air flow High Pipe lenght 5m Voltage 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 ratio Outdoor temp C a Conditions In...

Page 6: ...n in Table 2 2 1 Never use copper pipes thinner than 0 8 mm even when it is available on the market 2 REFRIGERANT R410A This air conditioner adopts the new refrigerant HFC R410A which does not damage the ozone layer The working pressure of the new refrigerant R410A is 1 6 times higher than conventional refrigerant R22 The refrigerating oil is also changed in accordance with change of refrigerant s...

Page 7: ...at 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 Pr...

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: ...in 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 Wireless remote control 57 18 160 6 60 Front panel Heat exchanger Air filter Air inlet Air outlet 275 790 Knock out system Knock out system 60 6 218 48 64 48 53...

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 9 52 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: ...r Check the DB01 R05 and C03 Refer to the service data for the detailed failure diagnosis Check Item OPERATION INDICATOR TERMINAL BLOCK FUSE 3 15A DC5V DC12V DC325V DC310 340V 1 2 3 4 5 6 MCC 861 BLK HA JEM A CN21 TERMINAL BLOCK LOUVER MOTOR FUSE T3 15A 4 3 2 1 CN08 CN24 CN13 WHI CN25 WHI INFRARED RAYS RECEIVING AND INDICATING PARTS 1 3 4 5 6 7 8 11 2 1 2 3 4 5 6 7 8 9 10 11 10 9 1 2 3 4 5 6 7 8 9...

Page 17: ...FILE NO SVM 05026 16 4 2 Outdoor Unit ...

Page 18: ... capacitor LLQ2G761KHUBTF 760µF DC 400 V x 3 pieces 13 Compressor thermo PW 2AL OFF 125 4 C ON 90 5 C Rectifier 14 Fan control relay D25XB60 4001 20A 600V 16 4 way valve coil SQ583 AC220 240V IGBT GT20J321 20A 600 Compressor DA89X1F 23F 3 phases 4 poles 750W 15 8 Dischenge temp Inverter attached 62kΩ 20 C sensor TD sensor No Parts name Type Specifications 1 Fan motor for indoor SKF 220 20 4A 1 AC ...

Page 19: ...Gauge 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 Outer dia 9 52mm Thickness 0 80mm INDOOR UNIT Cross flow fan Temp measurement Muffler TD Compressor DA89X1F 23F Split capillary Refrigerant amount 0 64kg NOTE Gas leak check position Refrigerant flow Cooling Refrigerant flow Heating Outdoor heat ...

Page 20: ...iping condition 5m Temperature condition C Indoor Outdoor 27 19 35 Standard pressure P MPa 1 1 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 pressure P MPa 2 4 pipe temp T1 C T2 C 40 0 Indoor fan mode High Outdoor fan mode High Compressor revolution rps 70 Standard Heat exchanger ...

Page 21: ...d 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 Signal Communication Opera...

Page 22: ... MCC 5009 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 Heat Exchanger temp se...

Page 23: ...Defrost control in heating operation Temp measurement by outdoor heat exchanger and control for 4 way valve and outdoor fan 8 OPERATION DESCRIPTION As the compressor adopts four pole brushless DC motor the frequency of the supply power from inverter to compressor is two times cycles of the actual number of revolution Operations followed to judgment of serial signal from indoor side 8 1 Outline of ...

Page 24: ...anges compressor motor speed by changing AC 220 240 V power to DC once and controls capac ity 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 electromotive force of the compressor motor under operation and the revolutio...

Page 25: ... according to the operation status AUTO A COOL DRY HEAT and FAN ONLY Besides positions of vertical 2 Swing If the SWING button is pressed during running operation vertical air flow louvers start swinging When the SWING button is pushed swinging stops 8 1 7 Indoor fan control 1 The indoor fan is operated by the stepless speed change motor 2 For air flow level speed of the indoor fan motor is contro...

Page 26: ...ompressor motor speed according to both the difference between the temperature detected by the room temperature sensor and the temperature set by TEMP button and also any change in room temperature When compressor has been activated or reactivated it operates with Max 33 rps for 2 minutes with Max 57 rps from 2 minutes to 3 minutes and with Max 64 rps after 3 minutes passed When room temperature i...

Page 27: ...is slowly up 3 Control 3 C zone Keep zone When TD detect value is 105 C or higher operating motor speed is not changed if raising operation speed 5 Control 5 E zone Nornal down of motor speed When TD detect value is 112 C or higher operating motor speed is down Zone Operation stop zone Normal down zone of motor speed Slow down of motor speed Keep zone Motor speed is not changed Slow up zone of mot...

Page 28: ...s shown in Fig 8 2 1 Because of the difference between room temperature and set temperature 3 Changing of air flow Fan setting One of 5 levels When the Hi POWER is started the fan of the indoor unit operates at higher consecutive air flow level Fan speed on the display of remote control does not change 10 QUIET operation control When the QUIET button is pushed the fan is restricted the revolution ...

Page 29: ...s performed The indoor fan motor operates as shown in Fig 8 2 6 Fan speed is AUTO only The outdoor fan motor operates as described in Table 8 1 3 and the compressor motor speed according to the operation command signal sent from the indoor unit NOTE 1 Middle motor speed between L and SUL Fig 8 2 6 Setting of air flow 8 2 3 Heating operation Transferring of heat operation signal from indoor unit to...

Page 30: ...f the compressor motor The power coupler IC20 for 4 way valve is turned on and turned off in defrost operation 1 Heating capacity control Calculate the difference between temperature detected by room temp sensor every minute and the set temp set on Temp indicator and variation amount of room temp Then obtain the correction amount of the com mand signal and correct the current frequency command sig...

Page 31: ...e and set temperature are separated to A B and C zone Then compressor motor speed in each zone are controlled by different speed After 30 minutes passed the different value of room temperature and set temperature is separated zone again by more different value than before Then compressor motor speed after 30 minute passed is lower than before by the same different value of room temperature and set...

Page 32: ... operation existence of Auto Restart and Temporary Cooling operation can be set by the RESET button of the indoor controller Table 8 3 1 8 3 1 Temporary auto operation When the RESET button is pushed the Auto operation with set temperature fixed at 25 C starts Controlling is same as that of Auto opera tion by the remote controller When the RESET button is pushed again the operation stops During Te...

Page 33: ...rt function proceed as follows The power supply to the unit must be on the function will not set if the power is off Push the RESET button located in the center of the front panel continuously for three seconds The unit receives the signal and beeps three times The unit then restarts operating automatically in the event of power supply being accidentally shut down While the filter check lamp is on...

Page 34: ... filter check lamp 8 5 1 How to turn off filter check lamp Push RESET button on the indoor unit Note If RESET button is pushed while the filter check lamp is not indicating the indoor unit will start the Automatic Operation Operation Motions Push RESET 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 beep...

Page 35: ...ff timer button OFF Push this button to set the OFF timer On timer button ON Push this button to set the ON timer Reserve button SET Push this button to reserve setting of time ON timer or OFF timer A receiving beep is heard Cancel button CLR Push this button to cancel ON timer and OFF timer A receiving beep is heard High power button Hi POWER Push this button to start the high power operation A r...

Page 36: ...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 Hi POWER display Indicates when the Hi POWER operation starts Push the Hi POWER button to start and push it again to stop the operation PRESET display Flashes for 4 seconds when the PRESET button is pushed and hold to memorize mark is indicated when PRE...

Page 37: ...ING A FIRE HAZARD PLACE THE UNIT WELL AWAY MORE THAN 2 M FROM HEAT SOURCES SUCH AS RADIATORS HEAT REGISTORS FURNACE STOVES ETC WHEN MOVING THE AIR CONDITIONER FOR INSTALLING IT IN ANOTHER PLACE AGAIN BE VERY CAREFUL NOT TO GET THE SPECIFIED REFRIGERANT WITH ANY OTHER GASEOUS BODY INTO THE REFRIGERATION CYCLE IF AIR OR ANY OTHER GAS IS MIXED IN THE REFRIGERANT THE GAS PRESSURE IN THE REFRIGERATION ...

Page 38: ...ole sloped slightly Shield pipe Air filter Hook Hook Attach to the front panel 65 mm or more 170 mm or more 1 Installation plate 170 mm or more 5 Sasa Zeolite plus filter 6 Bio enzyme The auxiliary piping can be connected the left rear left rear right right bottom right or bottom left Right Rear right Bottom right Left Rear left Bottom left Gingko filte 2 Wireless remote control 8 Pan head wood sc...

Page 39: ...s New tools for R 410A 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 ea...

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: ...of the connecting cable can be carried out without removing the front panel 1 Remove the air inlet grille Open the air inlet grille upward and pull it toward you 2 Remove the terminal cover and cord clamp 3 Insert the connecting cable according to 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...

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: ... 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 install the unit to preve...

Page 44: ...r 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 of indoor and out...

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: ...emperature No Operation of air conditioner Descriptions The OEPRATION lamp of the indoor unit flashes when power source is turned on If 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 operates T...

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: ...check codes 00 to 22 as shown in Table 9 4 1 Press TIMER 9 button to change the check code backwards If there is a fault the indoor unit will beep for 10 seconds Pi Pi Pi Note the check code on the display of the remote control 2 digits alphanumeric will be indicated on the display All lamps on the indoor unit will blink 5 times per 1 sec 4 Press button to release the service mode The display of t...

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: ...y pressing button on remote control Does transmission mark on remote control flash normally and is its signal transmitted properly Remote control is defective Refer to 5 Remote Control Is fuse F01 of indoor control board blown Is voltage DC 12V or 5V indicated on rear of indoor control board normal Microcomputer is defective Replace main P C board Refer to Primary check or this problem is one step...

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: ... prevent temperature rising cause of incompleted connecting Does the cross flow fan rotate normally Is the rotation signal DC 5 V 0 V output between 2 gray lead wire and 3 brown lead wire of the motor connector CN11 when rotating the cross flow fan by hand in no operating status 1 pulse one turn Turn on the power supply Repair the bearing of the fan Turn the power supply Shut off the power supply ...

Page 54: ... 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 control is defec...

Page 55: ...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 56: ...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 57: ...r and compressor Check whether 25A 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 760mF 400WV x 3 After operation turn off the power breaker after 2 minutes 20 seconds passed and discharge the electrolytic capacity by soldering iron Check vo...

Page 58: ... 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 59: ... do not indicate normally after approximate 3 sec 1 Compressor does not operate 2 OPERATION lamp blinks 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 from the electronic parts base Remove the connecting cable from the terminal block ...

Page 60: ...ischarge 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 61: ...F 23F 2 Outdoor fan motor Model HF 240 20B 2 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 refer to Section 10 9 Check conduction by using the ...

Page 62: ...f 6 Check that the tester shows the normal charging characteristics in continuity test C12 C13 C14 760µF 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 pola...

Page 63: ...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 64: ...und connection remove the screw 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 screw on the electrical part box 3 Connect the 3 connectors and arrange the wiring same as original c...

Page 65: ... 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 6 mm 1 Remove the front panel e...

Page 66: ...op 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 5009 Top View ...

Page 67: ...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 68: ...charge 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 th...

Page 69: ...nection with reactor remove the connector 2P 2 Connectors 6 positions CN300 CN703 Outdoor fan 3P white See Note 1 CN701 4 way valve 3P Yellow CN601 TD sensor 2P White CN602 TO sensor 2P White CN500 Case thermo 2P White 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 assemb...

Page 70: ...nd 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 touch ...

Page 71: ...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 72: ...tective 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 Replacem...

Page 73: ...door Unit E Parts Assy Location Part Location Part No No No No 401 43T69319 TEMPERATURE SENSOR 404 43T62003 CORD CLAMP 402 43T60002 TERMINAL BLOCK 3P 405 43T69079 PC BOARD ASSY WRS LED 403 43T69320 TEMPERATURE SENSOR 406 43T69472 PC BOARD Description Description ...

Page 74: ...3T85469 OWNER S MANUAL 209 43T21321 MOTOR STEPPING For RAS 10NKV E 210 43T44366 REFRIGERATION CYCLE ASSY 225 43T85470 OWNER S MANUAL 211 43T47006 PIPE DELIVERY For RAS 10NKV E 212 43T47005 PIPE SUCTION 225 43T85471 OWNER S MANUAL 214 43T11301 PIPE SHIELD For RAS 10NKV E 215 43T19302 HOLDER SENSOR 225 43T85472 OWNER S MANUAL 216 43T49302 PLATE OF EVA SEAL For RAS 10NKV E 217 43T49006 HOLDER FOR PLA...

Page 75: ...T41381 COMPRESSOR 6 43T00363 BACK CABINET COATING ASSEMBLY 19 43T62305 PACKED VALVE COVER 7 43T47308 CAPILLARY TUBE 1 0 DIA 20 43T00394 UPPER CABINET COATING ASSEMBLY 8 43T46011 VALVE PACKED 9 52 DIA 21 43T63301 FIXING PLATE VALVE 9 43T47332 BONNET 9 52 DIA 22 43T42314 BASE COATING ASSEMBLY 10 43T46308 VALVE PACKED 6 35 DIA 23 43T79305 DRAIN NIPPLE 11 43T47331 BONNET 6 35 DIA 24 43T46313 REACTOR 1...

Page 76: ...sy Location Part Location Part No No No No 701 43T62320 HEATSINK 704 43T60326 FUSE 702 43T69483 PC BOARD 705 43T50305 TEMPERATURE SENSOR 703 43T60352 TERMINAL BLOCK 6P 706 43T50304 TEMPERATURE SENSOR 707 43T62313 BASE PLATE PC Description Description ...

Page 77: ...FILE NO SVM 02007 78 TOSHIBA CARRIER CORPORATION ...

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