Toshiba RAS-M07N3KV2-E Service Manual
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Toshiba RAS-M07N3KV2-E Service Manual

Split type indoor unit high wall, heat pump type
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FILE NO. SVM-12072

SERVICE MANUAL

SPLIT TYPE
Indoor Unit
<High Wall, Heat Pump Type>
RAS-M07N3KV2-E
R410A
January, 2013

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Summary of Contents for Toshiba RAS-M07N3KV2-E

  • Page 1: Service Manual

    FILE NO. SVM-12072 SERVICE MANUAL SPLIT TYPE Indoor Unit <High Wall, Heat Pump Type> RAS-M07N3KV2-E R410A January, 2013...

  • Page 2: Table Of Contents

    FILE NO. SVM-12072 CONTENTS 1. SAFETY PRECAUTIONS ................2 2. SPECIFICATIONS ..................5 3. CONSTRUCTION VIEWS ................. 6 4. WIRING DIAGRAM ..................7 5. SPECIFICATIONS OF ELECTRICAL PARTS .......... 8 6. REFRIGERANT CYCLE DIAGRAM ............9 7. CONTROL BLOCK DIAGRAM ..............10 8.

  • Page 3: Safety Precautions

    FILE NO. SVM-12072 1. SAFETY PRECAUTIONS The manufacturer shall not assume any liability for the damage caused by not observing the description of this manual. Be sure to read this installation manual carefully before installing. Recommend to the owner to perform maintenance periodically when using over long periods of time. Be sure to follow the precautions provided here to avoid safety risks.
  • Page 4 FILE NO. SVM-12072 WARNING • Installation work must be requested from the supplying retail dealership or professional vendors. Self-installation may cause water leakage, electrical shock, or fire as a result of improper installation. • Specified tools and pipe parts for model R410A are required, and installation work must be done in accordance with the manual.
  • Page 5 FILE NO. SVM-12072 CAUTION • Please read this installation manual carefbefore installing the unit. It contains further important instructions for proper installation. • Exposure of unit to water or other moisture before installation could result in electric shock. Do not store it in a wet basement or expose to rain or water.

  • Page 6: Specifications

    FILE NO. SVM-12072 2. SPECIFICATIONS RAS-M07N3KV2-E Unit model Indoor ∗1 Outdoor ∗1 Cooling capacity (kW) ∗ 1 Cooling capacity range (kW) ∗1 Heating capacity (kW) ∗1 Heating capacity range (kW) Power supply 220~240V-1Ph-50Hz / 220V-1Ph-60Hz RAS-M07N3KV2-E Electric Indoor Unit model...

  • Page 7: Construction Views

    FILE NO. SVM-12072 3. CONSTRUCTION VIEWS Indoor Unit Air filter Front panel Air filter Heat exchanger Installation plate hanger Wireless remote controller Installation plate hanger Drain hose (0.50m) Connecting pipe (0.35m) Connecting pipe (0.40m) (Flare 9.52mm) (Flare 6.35mm) 17.5 84.5 84.5 Remote controller holder Minimum...

  • Page 8: Wiring Diagram

    FILE NO. SVM-12072 4. WIRING DIAGRAM Outdoor terminal block Indoor terminal block POWER SUPPLY (From outdoor Unit) GRN&YEL Heat exchanger CN01 CN51 AC Motor CN31 (WHI) FAN motor Heat Exchanger Sensor CN63 (TCJ) (YEL) CN33 (WHI) Heat Exchanger Sensor CN62 (BLU) (TC) Varistor...

  • Page 9: Specifications Of Electrical Parts

    FILE NO. SVM-12072 5. SPECIFICATIONS OF ELECTRICAL PARTS Indoor Unit Parts name Type Specifications Fan motor (for indoor) AFN-220-20-4D AC 240V, 20W Room temp. sensor (TA-sensor) ( - ) 10kΩ at 25°C Heat exchanger temp. sensor (TC-sensor) ( - ) 10kΩ...

  • Page 10: Refrigerant Cycle Diagram

    FILE NO. SVM-12072 6. REFRIGERANT CYCLE DIAGRAM Temp. measurement INDOOR UNIT Indoor heat exchanger Cross flow fan : ∗1 Max. : ∗1 Min. Pressure measurement Chargeless : ∗1 Deoxidized copper pipe Charge : ∗1 Gauge attaching port Outer dia. : 6.35mm Vacuum pump connecting port Thickness : 0.8mm Sectional shape...

  • Page 11: Control Block Diagram

    FILE NO. SVM-12072 7. CONTROL BLOCK DIAGRAM I I ndoor Unit Indoor Unit Control Unit M.C.U. Louver Functions Motor Heat Exchanger Sensor (Tc) • Cold draft preventing Function Room Temperature Sensor (Ta) Louver Motor • 3-minute Delay at Restart for Compressor Drive Control Infrared Rays Signal Receiver •...

  • Page 12: Operation Description

    FILE NO. SVM-12072 8. OPERATION DESCRIPTION 8-1. Outline of Air Conditioner Control • Detection of inverter input current and current release operation This air conditioner is a capacity-variable type air • Over-current detection and prevention operation conditioner, which uses AC or DC motor for the indoor to IGBT module (Compressor stop function) for motor and the outdoor fan motor.
  • Page 13 FILE NO. SVM-12072 8-2. Operation Description 1. Basic operation ......................13 1. Operation control ....................13 2. Operating mode selection when performing 2-room operation ......14 3. Cooling/Heating operation ..................14 4. AUTO operation ....................15 5. DRY operation ....................... 15 2.

  • Page 14: Basic Operation

    FILE NO. SVM-12072 Item Operation flow and applicable data, etc. Description 1. Basic 1. Operation control operation Receiving the user’s operation condition setup, the operation statuses of indoor/outdoor units are controlled. 1) The operation conditions are selected by the remote controller as shown in the below. 2) A signal is sent by ON button of the remote controller.

  • Page 15: Operating Mode Selection When Performing 2-Room Operation

    FILE NO. SVM-12072 Item Operation flow and applicable data, etc. Description 1. Basic 2. Operating mode selection when performing 2-room operation operation 1) The outdoor unit operation mode conforms to the instructions of the indoor unit that was pressed first. 2) When combined operation consisting of cooling (dry) and heating, fan and heating, or cleaning operation and heating is performed, operation conforms to the instructions of the indoor unit that was pressed first as shown in the following table.

  • Page 16: Auto Operation

    FILE NO. SVM-12072 Item Operation flow and applicable data, etc. Description 1. Basic 4. AUTO operation 1) Detects the room temperature (Ta) when operation the operation started. Selection of operation mode 2) Selects an operation mode from Ta in As shown in the following figure, the operation starts by selecting automatically the status of room temperature the left figure.

  • Page 17: Indoor Fan Motor Control

    *5 : Fan speed = (M + –L) x 1/4 + L +1.0 +0.5 (Linear approximation L(W6) from M+ and L) (Table 1) Indoor fan air flow rate RAS-M07N3KV2-E Fan speed COOL HEAT Fan speed Air flow rate level (rpm)
  • Page 18 FILE NO. SVM-12072 Item Operation flow and applicable data, etc. Description 2. Indoor fan <In heating operation> 1) When setting the fan speed to L, motor control L+, M, M+ or H on the remote controller, the operation is per- formed with the constant speed HEAT ON shown in Fig.

  • Page 19: Capacity Control

    FILE NO. SVM-12072 Item Operation flow and applicable data, etc. Description 3. Capacity The cooling or heating capacity depending on the load is 1) The difference between set control adjusted. temperature on remote controller (Ts) and room temperature (Ta) According to difference between the setup value of tempera- is calculated.

  • Page 20: Release Protective Control By Temperature Of Indoor Heat Exchanger

    FILE NO. SVM-12072 Item Operation flow and applicable data, etc. Description 4. Release protective <In cooling/dry operation> 1) When temperature of the indoor control by tempera- heat exchanger drops below 5°C, (Prevent-freezing control for indoor heat exchanger) ture of indoor heat the compressor speed is In cooling/dry operation, the sensor of indoor heat exchanger...

  • Page 21: Louver Control

    FILE NO. SVM-12072 Item Operation flow and applicable data, etc. Description 5. Louver control This function controls the air direction of the indoor unit. • The position is automatically controlled according to the operation 1) Louver position mode (COOL/HEAT). • The set louver position is stored in memory by the microcomputer, and the louver returns to the stored position when the next operation is performed.

  • Page 22: Eco Operation

    * 10 (DRY max - COOL min) /6 x 3 + COOL min * 9 (DRY max - COOL min) /6 x 2 + COOL min * 8 (DRY max - COOL min) /6 x 1 + COOL min RAS-M07N3KV2-E Cool min DRY max <Heating operation>...

  • Page 23: Temporary Operation

    FILE NO. SVM-12072 Item Operation flow and applicable data, etc. Description 7. Temporary Pressing [RESET] button starts the temporary opera- 1) When pressing [RESET] button, the operation tion of [AUTO] operation. When keeping [RESET] temporary [AUTO] operation starts. button pressed for 10 seconds or more, the temporary 2) When keeping [RESET] button pressed [COOL] operation is performed.

  • Page 24: Self-Cleaning Function

    FILE NO. SVM-12072 Item Operation flow and applicable data, etc. Description 8. Self-Cleaning 1. Purpose function The Self-Cleaning operation is to minimize the growth of mold, bacteria etc. by running the fan and drying so as to keep the inside of the air conditioner clean. Unit now performing cooling or dry operation Self-Cleaning operation When the cooling or dry operation shuts...

  • Page 25: Self-Cleaning Function

    FILE NO. SVM-12072 Item Operation flow and applicable data, etc. Description • Self-Cleaning diagram 9. Self-Cleaning function Operation display FCU fan rpm is depend on presetting. (500RPM) OPEN (12.7º) FCU louver OPEN CLOSE ON or OFF ON or OFF Timer display depend on presetting of timer function.

  • Page 26: Remote-A Or B Selection

    FILE NO. SVM-12072 Item Operation flow and applicable data, etc. Description J201 PCB NO : WP-020 10. Remote-A or B Setting the remote controller 1. Purpose selection To separate using of remote control for each indoor This operation is to operate only one unit in case of 2 air conditioner are installed nearly.

  • Page 27: Quiet Mode

    FILE NO. SVM-12072 Item Operation flow and applicable data, etc. Description 11. QUIET mode When the [QUIET] button is pressed, the fan of the Quiet mode is the system which, control the indoor unit will be restricted the revolving speed at revolving speed of indoor fan to work −...

  • Page 28: One-Touch Comfort

    FILE NO. SVM-12072 Item Operation flow and applicable data, etc. Description 14. One-Touch One touch comfort is the fully automated operation Operation condition for model to Europe Comfort that is set according to the preferable condition in market a region. When an indoor unit receives "One Touch Comfort Signal"...

  • Page 29: Auto Restart Function

    FILE NO. SVM-12072 8-3. Auto Restart Function (Default setting from factory is ON). 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.

  • Page 30: Power Failure During Timer Operation

    FILE NO. SVM-12072 8-3-2. How to Set the Auto Restart Function To set Auto Restart Function, proceed as follows: 1. The power supply to the unit must be ON ; The function will not set or reset if the power supply is OFF. 2.

  • Page 31: Remote Controller And Its Fuctions

    The coutomised settings control temperature air flow strength, air flow direction and other settings to provide you alternate contact with "ONE-TOUCH" OF THE BUTTON. If you prefer other settings you can select from the many other operation functions of your Toshiba unit Press : Start the operaton.
  • Page 32 FILE NO. SVM-12072 4. DRY OPERATION (COOLING ONLY) For dehumidification, a moderate cooling performance is controlled automatically. 1. Press : Select Dry MODE 2. Press : Set the desired temperature. 5. Hi-POWER OPERATION To automatically control room temperature and airflow for faster cooling operation (except in DRY and FAN ONLY mode).
  • Page 33 FILE NO. SVM-12072 9. PRESET OPERATION Set your preferred operation for future use. The setting will be memorized by the unit for future operation (except air flow direction). 1. Select your preferred operation. 2. Press and hold for 3 seconds to memorize the setting. The mark displays.

  • Page 34: Name And Functions Of Indications On Remote Contr Oller

    FILE NO. SVM-12072 8-4-3. Names and Functions of Indications on Remote Controller [Display] All indications, except for the clock time indicator, are displayed by pushing the button. Transmission mark (PRESET) indicator This transmission mark indicates when the remote Flashes for 3 seconds when the PRESET button is controller transmits signals to the indoor unit.

  • Page 35: Installation Procedure

    FILE NO. SVM-12072 9. INSTALLATION PROCEDURE 9-1. Installation Diagram of Indoor and Outdoor Units For the rear left and left piping Hook Installation plate Wall Insert the cushion between the indoor unit and wall, and tilt the indoor unit for better operation.
  • Page 36 FILE NO. SVM-12072 9-2. Installation 9-2-1. Optional installation parts Part Parts name Q'ty Code Refrigerant piping Liquid side : ∅6.35 mm each ∅ Gas side 9.52 mm Pipe insulating material (polyethylene foam, 6 mm thick) Putty, PVC tapes each <Fixing bolt arrangement of outdoor unit> 108 mm 125 mm Air inlet...
  • Page 37 Part name (Q’ty) Flat head wood screw ∅3.1 x 25 s x 1 Installation plate x 1 Toshiba New IAQ filter (L) x 1 Drain nipple* x 1 Battery-cover x 1 Wireless remote control x 1 Cap water proof x 2 Mounting screw ∅4 x 25 s x 6...
  • Page 38 FILE NO. SVM-12072 9-2-3. Installation/Servicing Tools Changes in the product and components In the case of an air conditioner using R410A, in order to prevent any other refrigerant from being charged accidentally, the service port diameter of the outdoor unit control valve (3 way valve) has been changed. (1/2 UNF 20 threads per inch) •...

  • Page 39: Indoor Unit

    FILE NO. SVM-12072 9-3. Indoor Unit 9-3-2. Cutting a hole and mounting installation plate 9-3-1. Installation place <Cutting a hole> A place which provides the spaces around the When installing the refrigerant pipes from the rear. indoor unit as shown in the diagram in part 8-2. A place where there is no obstacle near the air inlet and outlet.
  • Page 40 FILE NO. SVM-12072 <When the installation plate is directly mounted on 9-3-3. Wiring connection the wall> <How to connect the connecting cable> 1. Securely fit the installation plate onto the wall by Wiring of the connecting cable can be carried out screwing it in the upper and lower parts to hook up the indoor unit.
  • Page 41 FILE NO. SVM-12072 <How to connect remote controller for wire operation> 70 mm * Wire size 28-22AWG or 0.08-0.32 mm Outer diameter not over 4.7 mm, control wire length 30 m. or less. Indoor unit 5 mm Notch for wire out Control wire Remote controller Fig.
  • Page 42 FILE NO. SVM-12072 Control wire Rear right Control wire Screw (∅3.1 x 16L) for Rear left Hole for hang hang remote controller remote controller Bottom left Remote controller Left Wall Bottom right Remote controller Right Screw (∅3.1 x 25L) for 1.
  • Page 43 FILE NO. SVM-12072 <Left-hand connection with piping> How to fix the drains cap 1) Insert hexagonal wrench (4 mm) in a center Bend the connecting pipe so that it is laid within 43 mm head. above the wall surface. If the connecting pipe is laid exceeding 43 mm above the wall surface, the indoor unit may unstably be set on the wall.
  • Page 44 FILE NO. SVM-12072 9-3-5. Indoor unit fixing 9-3-6. Drainage 1. Pass the pipe through the hole in the wall, and hook 1. Run the drain hose sloped downwards. the indoor unit on the installation plate at the upper hooks. NOTE 2.
  • Page 45 FILE NO. SVM-12072 9-4. Others 9-4-2. Test operation To switch the TEST RUN (COOL) mode, press 9-4-1. Remote Control A-B Selection RESET button for 10 sec. • When two indoor units are installed in the same room or (The beeper will make a short beep.) adjacent two rooms, if operating a unit, two units may receive the remote control signal simultaneously and operate.

  • Page 46: How To Diagnose The Trouble

    FILE NO. SVM-12072 10. HOW TO DIAGNOSE THE TROUBLE The pulse motor circuits are mounted to both indoor and outdoor units. Therefore, diagnose troubles according to the trouble diagnosis procedure as described below. (Refer to the check points in servicing written on the wiring diagrams attached to the indoor/outdoor units.) Table 10-1 Troubleshooting Procedure...
  • Page 47 FILE NO. SVM-12072 CAUTION A high voltage (equivalent to the supply voltage) is also energized to ground through the sensors, PMV and other low-voltage circuits. The sensor leads and other wires are covered with insulated tubes for protection. Nevertheless, care must be taken to ensure that these wires are not pinched.
  • Page 48 FILE NO. SVM-12072 10-1. First Confirmation 10-1-1. Confirmation of Power Supply Confirm that the power breaker operates (ON) normally. 10-1-2. Confirmation of Power Voltage Confirm that power voltage is AC 220–230–240 ± 10%. If power voltage is not in this range, the unit may not operate normally. 10-1-3.

  • Page 49: Primary Judgment

    FILE NO. SVM-12072 10-2. Primary Judgment To diagnose the troubles, use the following methods. 1) Judgment by flashing LED of indoor unit 2) Self-diagnosis by service check remote controller 3) Judgment of trouble by every symptom Firstly use the method 1) for diagnosis. Then, use the method 2) or 3) to diagnose the details of troubles. 10-3.

  • Page 50: Self-Diagnosis By Remote Controller (Check Code)

    FILE NO. SVM-12072 10-4. Self-Diagnosis by Remote Controller (Check Code) 1. If the lamps are indicated as shown B to E in Table 10-3-1, execute the self-diagnosis by the remote controller. 2. When the remote controller is set to the service mode, the indoor controller diagnoses the operation condi- tion and indicates the information of the self-diagnosis on the display of the remote controller with the check codes.
  • Page 51 FILE NO. SVM-12072 10-4-2. Caution at Servicing 1. After servicing, press the [ ] button to return to the normal mode. 2. After servicing by the check code, turn off breaker of the power supply, and turn on breaker of the power supply again so that memory in the microcomputer returns the initial status.
  • Page 52 FILE NO. SVM-12072 Block distinction Operation of diagnosis function Judgment and action Check Check Block Cause of operation conditioner Remarks code code status Outdoor P.C. Inverter over-current All off Displayed when Even if trying operation again, all board protective circuit error is detected.

  • Page 53: Judgment Of Trouble By Every Symptom

    FILE NO. SVM-12072 10-5. Judgment of Trouble by Every Symptom 10-5-1. Indoor Unit (Including Remote Controller) (1) Power is not turned on (Does not operate entirely) <Primary check> 1. Is the supply voltage normal? 2. Is the normal voltage provided to the outdoor unit? 3.
  • Page 54 FILE NO. SVM-12072 (2) Power is not turned on though Indoor P.C. board is replaced <Confirmation procedure> Turn on power supply. Is wired correctly to white and black Correct wiring. Does operation lamp flash? lead wires of terminal board? To item of “Power is not turned on”.
  • Page 55 FILE NO. SVM-12072 (3) Only the indoor motor fan does not operate <Primary check> 1. Is it possible to detect the power supply voltage (AC220–240V) between on the terminal block? 2. Does the indoor fan motor operate in cooling operation? (In heating operation, the indoor fan motor does not operate for approximately 10 minutes after it is turned on, to prevent a cold air from blowing in.) Shut off the...
  • Page 56 FILE NO. SVM-12072 (For AC fan motor) <Inspection procedure> 1. Remove the front panel. (Remove 2 screws.) 2. Remove the cover of the fan motor lead wires. 3. Check AC voltage with CN31 connector while the fan motor is rotating. NOTE : •...
  • Page 57 FILE NO. SVM-12072 (4) Troubleshooting for remote control The unit does not beep at all. Press [ OPERATION lamp on button. indoor unit is not indicated. Is transmission mark indicated? Press RESET button on remote control Is receiver on with tip of pencil. indoor unit exposed to direct sunlight? Does indoor unit...
  • Page 58 FILE NO. SVM-12072 10-5-2. Wiring Failure (Interconnecting and Serial Signal Wire) (1) Outdoor unit does not operate 1) Is the voltage between of the indoor terminal block varied? Confirm that transmission from indoor unit to outdoor unit is correctly performed based upon the follow- ing diagram.

  • Page 59: How To Check Simple The Main Parts

    FILE NO. SVM-12072 10-6. How to Check Simple the Main Parts <Check procedure> Gas leakage, Discharge temp. error, disconnection of TS/TC gas leakage sensors (Check code 02, 1C) (Check code 03, 1E) Valve drive check Is coil of the pulse motor valve Set it correctly.

  • Page 60: How To Diagnose Trouble In Outdoor Unit

    FILE NO. SVM-12072 10-7. How to Diagnose Trouble in Outdoor Unit 10-7-1. Summarized Inner Diagnosis of Inverter Assembly Table 10-7-1 Diagnosis/Process flowchart Item Contents Summary Preparation Turn “OFF” the power supply breaker, and remove 3P Remove connector connector which connects of compressor.

  • Page 61: How To Check Simply The Main Parts

    FILE NO. SVM-12072 Diagnosis/Process flowchart Item Contents Summary Check Check winding resistance between phases of compres- sor, and resistance between outdoor frames by using a tester. → OK if 10MΩ or more • Is not grounded. Replace control board assembly. ...
  • Page 62 FILE NO. SVM-12072 (3) Check procedures Table 10-8-1 Procedure Check points Causes Turn off the power supply breaker Check whether or not the fuse (F01) Impulse voltage was applied or the and remove the P.C. board is blown. indoor fan motor short-circuited. assembly from electronic parts base.
  • Page 63 FILE NO. SVM-12072 10-8-2. P .C . Board Layout + 5V + 12V +12V [1] Sensor characteristic table TD : Discharge temp. sensor TA : Room temp. sensor TC : Heat exchanger temp. sensor TO : Outdoor temp. sensor TS : Suction temp. sensor TA, TC, TO, TS, TE : Outdoor heat exchanger temp sensor...
  • Page 64 FILE NO. SVM-12072 10-8-3. Indoor Unit (Other Parts) Part name Checking procedure Room temp. (TA) sensor Disconnect the connector and measure the resistance value with tester. Heat exchanger (TC) sensor (Normal temp.) Temperature 10°C 20°C 25°C 30°C 40°C Sensor TA, TC (kΩ) 20.7 12.6 10.0...
  • Page 65 FILE NO. SVM-12072 10-8-5. Checking Method for Each Part Part name Checking procedure Electrolytic capacitor 1. Turn OFF the power supply breaker. (For raising pressure, smoothing) 2. Discharge all three capacitors completely. 3. Check that safety valve at the bottom of capacitor is not broken. 4.

  • Page 66: How To Simply Judge Whether Outdoor Fan Motor Is Good Or Bad

    FILE NO. SVM-12072 10-9. How to Simply Judge Whether Outdoor Fan Motor is Good or Bad 1. Symptom • Outdoor fan motor does not rotate. • Outdoor fan motor stops within several tens seconds though it started rotating. • Outdoor fan motor rotates or does not rotate according to the position where the fan stopped, etc. Remote controller check code “02 : Outdoor block, 1A : Outdoor fan drive system error”...

  • Page 67: How To Replace The Main Parts

    FILE NO. SVM-12072 11. HOW TO REPLACE THE MAIN PARTS WARNING • Since high voltages pass through the electrical parts, turn off the power without fail before proceeding with the repairs. Electric shocks may occur if the power plug is not disconnected. •...
  • Page 68 FILE NO. SVM-12072 Part name Procedures Remarks  Front panel 4) Press "PUSH" part under the front panel and remove hooks of the front panel from Installation plate the installation plate. Front panel Press 5) Remove the front panel fixing screws. (2 pcs.) 6) Take off three hooks of panel from rear side.
  • Page 69 FILE NO. SVM-12072 Part name Procedures Remarks ‚ ‚ Electric parts 1) Follow the procedure up to 3) in above. box assembly 2) Remove screw of earth lead attached to the end plate of the evaporator. 3) Remove the lead wire cover, and remove connector for the fan motor and connec- tor for the louver motor from the electric parts box assembly.
  • Page 70 FILE NO. SVM-12072 Part name Procedures Remarks ƒ Horizontal louver 1) Remove shaft of the horizontal louver from the back body. (First remove the left shaft, and then remove other shafts while sliding the horizontal louver leftward.) „ ƒ Evaporator 1) Follow to the procedure in the item (Heat exchanger) 2) Remove the pipe holder from the rear side of the main unit.
  • Page 71 FILE NO. SVM-12072 Part name Procedures Remarks … „ Bearing 1) Follow to the procedure in the item 2) Remove the two screws used to secure the bearing base. Two screws 3) Remove the bearing base. <Caution at assembling> • If the bearing is out from the housing, push it into the specified position and then incorporate it in the main body.
  • Page 72 FILE NO. SVM-12072 Part name Procedures Remarks † … Fan motor 1) Follow to the procedure till item 2) Loosen the set screw of the cross flow fan. 3) Remove two fixing screws of the motor cover and them remove the motor cover. 4) Remove two more fixing screws of the motor band and remove the motor band.
  • Page 73 FILE NO. SVM-12072 Part name Procedures Remarks ‡ Cross flow fan <Caution at reassembling> Fan motor D shaft Double point set screw 1) To incorporate the fan motor incorporate the motor into the position in the following figure, and then install the fan motor. •...
  • Page 74 FILE NO. SVM-12072 11-2. Microcomputer Part name Procedure Remarks  Common procedure 1) Turn the power supply off to stop the Replace terminal block, operation of air-conditioner. microcomputer ass’y and the P .C. board ass’y. 2) Remove the front panel. •...

  • Page 75: Exploded Views And Parts List

    FILE NO. SVM-12072 12. EXPLODED VIEWS AND PARTS LIST 12-1. Indoor Unit (Part-E) Location Part Location Part Description Description 43T21435 STEPPING MOTOR ASSEMBLY 43T39344 BEARING-BASE-ASSEMBLY 43T21409 FAN MOTOR 43T39343 MOTOR BAND (LEFT) 43T22312 BEARING ASSY, MOLD 43T39329 MOTOR BAND (RIGHT) 43T70313 HOSE, DRAIN 43T09409...
  • Page 76 FILE NO. SVM-12072 12-2. Indoor Unit Location Part Location Part Description Description 43T69319 TEMPERATURE SENSOR 43T6V316 PC BOARD ASSY;WRS-LED 43T50306 TEMPERATURE SENSOR 43T6V335 PC BOARD 43T69320 TEMPERATURE SENSOR 43T60378 TERMINAL 43T62340 CORD-CLAMP 43T60417 TERMINAL – –...
  • Page 77 FILE NO. SVM-03005 TOSHIBA CARRIER (THAILAND) CO.,LTD. – 56 –...

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