Toshiba RAS-M24N3KV2-E Service Manual
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Toshiba RAS-M24N3KV2-E Service Manual

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FILE NO. SVM-12087

SERVICE MANUAL

AIR-CONDITIONER
SPLIT TYPE
Indoor Unit
<High Wall, Heat Pump Type>
RAS-M24N3KV2-E
R410A
February, 2013

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Summary of Contents for Toshiba RAS-M24N3KV2-E

  • Page 1: Service Manual

    FILE NO. SVM-12087 SERVICE MANUAL AIR-CONDITIONER SPLIT TYPE Indoor Unit <High Wall, Heat Pump Type> RAS-M24N3KV2-E R410A February, 2013...

  • Page 2: Table Of Contents

    FILE NO. SVM-12087 CONTENTS 1. SAFETY PRECAUTIONS ................2 2. SPECIFICATIONS ..................4 3. REFRIGERANT R410A ................5 4. CONSTRUCTION VIEWS ................ 13 5. WIRING DIAGRAM .................. 14 6. SPECIFICATIONS OF ELECTRICAL PARTS ........15 7. REFRIGERANT CYCLE DIAGRAM ............16 8.
  • Page 3 FILE NO. SVM-12087 13. EXPLODED VIEWS AND PARTS LIST 13-1. Indoor Unit Location Part Location Part Description Description 43T21407 MOTOR FAN 43T39020 BAND, MOTOR, LEFT 43T22312 BEARING ASSY, MOLD 43T39023 BAND,MOTOR, RIGHT DOWN 43T70313 HOSE, DRAIN 43T39022 BAND, MOTOR, RIGHT UP 43T20016 FAN, ASSY, CROSS FLOW 43T09040 LOUVER, HORIZONTAL 43T49010 PIPE, SHIELD...

  • Page 4: Safety Precautions

    FILE NO. SVM-12087 1. SAFETY PRECAUTIONS For general public use Power supply cord of parts of appliance for outdoor use shall be at least polychloroprene sheathed flexible cord (design H07RN-F) or cord designation 60245 IEC66. (Shall be installed in accordance with national wiring regulations.) •...
  • Page 5 FILE NO. SVM-12087 • DO NOT INSTALL NEAR CONCENTRATIONS OF COMBUSTIBLE GAS OR GAS VAPORS. FAILURE TO FOLLOW THIS INSTRUCTION CAN RESULT IN FIRE OR EXPLOSION. • TO PREVENT THE INDOOR UNIT FROM OVERHEATING AND CAUSING A FIRE HAZARD, PLACE THE UNIT WELL AWAY (MORE THAN 2 M) FROM HEAT SOURCES SUCH AS RADIATORS, HEAT REGISTERS, FURNACE, STOVES, ETC.

  • Page 6: Specifications

    Outdoor (Cooling/Heating) (°C) Accessory Indoor unit Installation plate Wireless remote controller Batteries Remote controller holder Toshiba New IAQ filter 6( 4x25L) Mounting screw Remote controller holder 2( 3.1Lx16L) Pan head wood screw Installation manual Owner's manual Outdoor unit Drain nipple Water-proof rubber cap *1 Refer to Service manual of the multi outdoor unit to be combined.

  • Page 7: Refrigerant R410A

    FILE NO. SVM-12087 3. REFRIGERANT R410A This air conditioner adopts the new refrigerant HFC 6. When an air conditioning system charged with a (R410A) which does not damage the ozone layer. large volume of refrigerant is installed in a small room, it is necessary to exercise care so that, The working pressure of the new refrigerant R410A even when refrigerant leaks, its concentration...
  • Page 8 FILE NO. SVM-12087 Table 3-2-1 Thicknesses of annealed copper pipes Thickness (mm) Nominal diameter Outer diameter (mm) R410A 6.35 0.80 0.80 9.52 0.80 0.80 12.70 0.80 0.80 15.88 1.00 1.00 2. Joints For copper pipes, flare joints or socket joints are used. Prior to use, be sure to remove all contaminants. a) Flare Joints Flare joints used to connect the copper pipes cannot be used for pipings whose outer diameter exceeds 20 mm.
  • Page 9 FILE NO. SVM-12087 d) Flare Processing Make certain that a clamp bar and copper pipe have been cleaned. ØD By means of the clamp bar, perform the flare processing correctly. Use either a flare tool for R410A or conven- tional flare tool. Flare processing dimensions differ according to the type of flare tool.
  • Page 10 FILE NO. SVM-12087 Table 3-2-6 Flare and flare nut dimensions for R22 Dimension (mm) Nominal Outer diameter Thickness Flare nut width diameter (mm) (mm) (mm) 6.35 9.52 13.0 13.5 12.70 16.0 16.2 12.9 15.88 19.0 19.7 16.0 19.05 23.3 24.0 19.2 Fig.
  • Page 11 FILE NO. SVM-12087 3-3. Tools 3-3-1. Required Tools The service port diameter of packed valve of the outdoor unit in the air-water heat pump using R410A is changed to prevent mixing of other refrigerant. To reinforce the pressure-resisting strength, flare processing dimensions and opposite side dimension of flare nut (For Ø12.7 copper pipe) of the refrigerant piping are lengthened.

  • Page 12: Recharging Of Refrigerant

    FILE NO. SVM-12087 3-4. Recharging of Refrigerant When it is necessary to recharge refrigerant, charge the specified amount of new refrigerant according to the following steps. Recover the refrigerant, and check no refrigerant remains in the equipment. When the compound gauge’s pointer has indicated –0.1 Mpa (–76 cmHg), place the handle Low in the fully closed position, and turn off the vacuum pump’s power switch.
  • Page 13 FILE NO. SVM-12087 1. Be sure to make setting so that liquid can be charged. 2. When using a cylinder equipped with a siphon, liquid can be charged without turning it upside down. It is necessary for charging refrigerant under condition of liquid because R410A is mixed type of refrigerant. Accordingly, when charging refrigerant from the refrigerant cylinder to the equipment, charge it turning the cylinder upside down if cylinder is not equipped with siphon.
  • Page 14 FILE NO. SVM-12087 3-5-3. Brazing 2. Characteristics required for flux • Activated temperature of flux coincides with As brazing work requires sophisticated techniques, the brazing temperature. experiences based upon a theoretical knowledge, it must be performed by a person qualified. •...

  • Page 15: Construction Views

    FILE NO. SVM-12087 4. CONSTRUCTION VIEWS Indoor Unit Heat exchanger Grille Inlet Air Inlet Air filter 1050 Front Panel Air outlet Knock out system Knock out system Wireless remote controller 17.5 Remote controller holder Drain hose (0.5m) Hanger Hanger Connecting pipe (0.39m) Connecting pipe (0.49m) 12.70) (Flare...

  • Page 16: Wiring Diagram

    FILE NO. SVM-12087 5. WIRING DIAGRAM Indoor Unit Outdoor Terminal Block Indoor Terminal Block 1 2 3 GRN&YEL Heat exchanger SHEET METAL CN01 (WHI) CN51 CN02 DC Motor CN31 Fan Motor (WHI) Heat Exchanger Sensor CN63 (YEL) (TCJ) Varistor CN62 Heat Exchanger Sensor (BLU) (TC)

  • Page 17: Specifications Of Electrical Parts

    FILE NO. SVM-12087 6. SPECIFICATIONS OF ELECTRICAL PARTS I I ndoor Unit Parts name Type Specifications Fan motor MF-340-30-3 DC340V, 30W (for indoor) Room temp. sensor (TA-sensor) ( — ) 10kΩ at 25°C Heat exchanger temp. sensor (TC-sensor) ( — ) 10kΩ...

  • Page 18: Refrigerant Cycle Diagram

    FILE NO. SVM-12087 7. REFRIGERANT CYCLE DIAGRAM T1 Temp. measurement INDOOR UNIT Indoor heat exchanger Per 1 unit Max. : * m Min. : * m Cross flow fan Chargeless : * m Charge : * m Pressure measurement Deoxidized copper pipe Gauge attaching port Outer dia.

  • Page 19: Control Block Diagram

    FILE NO. SVM-12087 8. CONTROL BLOCK DIAGRAM Indoor Unit Heat Exchanger Sensor (Tcj) Indoor Unit Control Unit M.C.U. Heat Exchanger Sensor (Tc) Louver Functions Motor • Cold draft preventing Function Room Temperature Sensor (Ta) • 3-minute Delay at Restart Louver Motor for Compressor Drive Control Infrared Rays Signal Receiver...

  • Page 20: Operation Description

    FILE NO. SVM-12087 9. OPERATION DESCRIPTION 9-1. 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 DC motor for the indoor fan to IGBT module (Compressor stop function) motor and the outdoor fan motor.
  • Page 21 FILE NO. SVM-12087 9-2. Operation Description 9-2. 1. Basic operation ......................20 1. Operation control ....................20 2. Cooling/Heating operation ..................21 3. AUTO operation...................... 21 4. DRY operation ......................21 2. Indoor fan motor control ....................22 3. Capacity control ......................24 4.

  • Page 22: Basic Operation

    FILE NO. SVM-12087 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 23: Cooling/Heating Operation

    FILE NO. SVM-12087 Item Operation flow and applicable data, etc. Description 1. Basic 2. Cooling/Heating operation operation The operations are performed in the following parts by controls according to cooling/heating conditions. 1) Receiving the operation ON signal of the remote controller, the cooling or heating operation signal starts being transferred form the indoor controller to the outdoor unit.

  • Page 24: Indoor Fan Motor Control

    FILE NO. SVM-12087 Item Operation flow and applicable data, etc. Description 2. Indoor fan <In cooling operation> motor control ∗ ∗ ∗ ∗ ∗ Symbols (This operation controls the fan speed at indoor unit side.) The indoor fan (cross flow fan) is operated by the phase- UH: Ultra High control induction motor.
  • Page 25 FILE NO. SVM-12087 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 26: Capacity Control

    FILE NO. SVM-12087 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 27: Release Protective Control By Temperature Of Indoor Heat Exchanger

    FILE NO. SVM-12087 Item Operation flow and applicable data, etc. Description 5. Release protective <In cooling/dry operation> 1) When temperature of the indoor control by heat exchanger drops below 5°C, (Prevent-freezing control for indoor heat exchanger) temperature of the compressor speed is re- In cooling/dry operation, the sensor of indoor heat indoor heat duced.

  • Page 28: Louver Control

    FILE NO. SVM-12087 Item Operation flow and applicable data, etc. Description 6. Louver control This function controls the air direction of the indoor unit. 1) Louver • The position is automatically controlled according to the operation 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 29: Defrost Control (Only In Heating Operation)

    FILE NO. SVM-12087 Item Operation flow and applicable data, etc. Description *Refer to SERVICE MANUAL of 7. Defrost control connected outdoor unit. (Only in heating operation) *Refer to SERVICE MANUAL of 8. ECO operation connected outdoor unit. 9. Temporary Pushing [RESET] button starts the temporary 1) When pushing [RESET] button, the operation of [AUTO] operation.

  • Page 30: Pulse Motor Valve (Pmv) Control

    FILE NO. SVM-12087 Item Operation flow and applicable data, etc. Description * Refer to SERVICE MANUAL of connected 10. Pulse motor outdoor unit. valve (PMV) control 11. Self-Cleaning 1. Purpose function The Self-Cleaning operation is to mini- mize the growth of mold, bacteria etc. by running the fan and drying so as to keep the inside of the air conditioner clean.

  • Page 31: Remote Controller-A Or B Selection

    FILE NO. SVM-12087 Item Operation flow and applicable data, etc. Description 11. Self-Cleaning • Self-Cleaning diagram function Operation display FCU fan rpm is depend on presetting. (450RPM) FCU louver OPEN OPEN (12.7°) CLOSE ON or OFF ON or OFF Timer display depend on presetting of timer function.

  • Page 32: Quiet Mode

    FILE NO. SVM-12087 Item Operation flow and applicable data, etc. Description 13. QUIET mode When the [QUIET] button is pushed, the fan of Quiet mode is the system which, control the the indoor unit will be restricted the revolving revolving speed of indoor fan to work constantly speed at speed L - until the [QUIET] button is at lower than speed L.

  • Page 33: One Touch Comfort

    FILE NO. SVM-12087 Item Operation flow and applicable data, etc. Description 16. One Touch One touch comfort is the fully automated operation that Operation condition for model to Comfort is set according to the preferable condition in a region. Europe market When an indoor unit receives “One Touch Comfort Signal”...

  • Page 34: Auto Restart Function

    FILE NO. SVM-12087 9-3. Auto Restart 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 3 minutes after power is restored.

  • Page 35: How To Cancel The Auto Restart Function

    FILE NO. SVM-12087 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 3 times. The unit will be required to be turned on with the remote controller after the main power supply is turned off. •...

  • Page 36: Remote Controller

    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 37 FILE NO. SVM-12087 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 DRYmode).
  • Page 38 FILE NO. SVM-12087 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 39: Names And Functions Of Indications On Remote Controller

    FILE NO. SVM-12087 9-4-3. 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 40: Installation Procedure

    FILE NO. SVM-12087 10. INSTALLATION PROCEDURE 10-1. 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. Do not allow the drain hose to get slack.
  • Page 41 FILE NO. SVM-12087 10-2. Installation 10-2-1. Optional installation parts Part Parts name Q'ty Code Refrigerant piping Liquid side : ∅6.35 mm each Gas side : ∅12.70 mm Pipe insulating material (polyethylene foam, 8 mm thick) Putty, PVC tapes each – 39 −...
  • Page 42 FILE NO. SVM-12087 10-2-2. Accessory and installation parts Part Part Part Part name (Q’ty) Part name (Q’ty) Part name (Q’ty) Flat head wood screw ∅3.1 x 16 s x 2 Installation plate x 1 Remote control holder x 1 Flat head wood screw ∅3.1 x 25 s x 1 Wireless remote control x 1 Filter x 1...
  • Page 43 FILE NO. SVM-12087 10-2-3. 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 acciden- tally, the service port diameter of the outdoor unit control valve (3-way valve) has been changed. (1/2 UNF 20 threads per inch) •...

  • Page 44: Indoor Unit

    FILE NO. SVM-12087 10-3. Indoor Unit 10-3-2. Drilling a Hole and Mounting Installation Plate 10-3-1. Installation Place • A place which provides enough spaces around <Cutting a hole> the indoor unit as shown in the diagram. When install the refrigerant pipes from the rear. •...
  • Page 45 FILE NO. SVM-12087 <When the installation plate is directly 10-3-3. Wiring Connection mounted on the wall> <How to connect the connecting cable> 1. Securely fit the installation plate onto the wall by screwing it in the upper and lower parts to hook Wiring the connecting cable can be carried up the indoor unit.

  • Page 46: How To Connect Remote Controller

    FILE NO. SVM-12087 70 mm 10-3-4. How to Connect Remote Controller for Wire Operation * Wire size 28-22 AWG (0.08~0.32 mm Outer diameter not over 4.7 mm, control wire length 30 m. or less. 5 mm Indoor unit Control wire out position Control wire Control wire Remote controller...

  • Page 47: Piping And Drain Hose Installation

    FILE NO. SVM-12087 Rear right Control wire Control wire Rear left Screw (∅3.1 x 16L) for 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 48 FILE NO. SVM-12087 <How to attach the drain cap> <In case of bottom right or bottom left piping> 1. Insert hexagon wrench (4 mm) in a center head. After scribing slits on the front panel with a knife or • a making-off pin, cut them with a pair of nippers or an equivalent tool.

  • Page 49: Indoor Unit Fixing

    FILE NO. SVM-12087 CAUTION Information • Bind the auxiliary pipes (two) and connecting The lower part of indoor unit may float, due to the cable with facing tape tightly. condition of piping and you cannot fix it to the In case of leftward piping and rear-leftward installation plate.

  • Page 50: Outdoor Unit

    FILE NO. SVM-12087 10-4. Outdoor Unit COMMENT Page Installation Place Draining the Water * Refer to SERVICE MANUAL Refrigerant Piping Connection of connected outdoor unit. Evacuating Wiring Connection – 48 –...
  • Page 51 FILE NO. SVM-12087 10-5. Others 10-5-1. Remote Control A-B Selection 10-5-2. Test operation • When two indoor units are installed in the same room or To switch the TEST RUN (COOL) mode, press adjacent two rooms, if operating a unit, two units may [RESET] button for 10 sec.

  • Page 52: How To Diagnose The Trouble

    FILE NO. SVM-12087 11. 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 11-1 COMMENT Page...
  • Page 53 FILE NO. SVM-12087 11-1. First Confirmation 11-1-1. Confirmation of Power Supply Confirm that the power breaker operates (ON) normally. 11-1-2. 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. 11-1-3.

  • Page 54: Primary Judgment

    FILE NO. SVM-12087 11-2. 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. 11-3.

  • Page 55: Self-Diagnosis By Remote Controller (Check Code)

    FILE NO. SVM-12087 11-4. Self-Diagnosis by Remote Controller (Check Code) 1. If the lamps are indicated as shown B to E in Table 11-3-1, 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 56 FILE NO. SVM-12087 11-4-2 Caution at Servicing 1. After using the service mode of remote controller finished, press the [ ] button to reset the remote controller to normal function. 2. After finished the diagnosis by the remote controller, turn OFF power supply and turn its ON again to reset the air conditioner to normal operation.
  • Page 57 FILE NO. SVM-12087 Block distinction Operation of diagnosis function Action and Judgment Check Check Display flashing Block Cause of operation conditioner code code error status Serial signal 1) Defective wiring of the Indoor unit Flashes when 1) to 3) The outdoor unit never and connecting connecting cable or operates...
  • Page 58 FILE NO. SVM-12087 Block distinction Operation of diagnosis function Action and Judgment Check Check Display flashing Block Cause of operation conditioner code code error status Outdoor P.C. Current on inverter circuit All OFF Flashes after 1. Remove connecting lead wire of the board is over limit in short time.
  • Page 59 FILE NO. SVM-12087 Block distinction Operation of diagnosis function Action and Judgment Check Check Display flashing Block Cause of operation conditioner code code error status Compressor drive output error. All OFF Flashes after 1. Check installation conditions such as (Relation of voltage, current error is detected packed valve opening, refrigerant and frequency is abnormal)
  • Page 60 FILE NO. SVM-12087 Block distinction Operation of diagnosis function Action and Judgment Check Check Display Block Cause of operation conditioner code code flashing error status Compressor does not rotate. All OFF Flashes after 1. Remove connecting lead wire of the Because of missed wiring, error is detected compressor, and operate again.

  • Page 61: Judgment Of Trouble By Every Symptom

    FILE NO. SVM-12087 11-5. Judgment of Trouble by Every Symptom I I ndoor 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 62 FILE NO. SVM-12087 (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.) Turn off power supply once,...
  • Page 63 FILE NO. SVM-12087 (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 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.
  • Page 64 FILE NO. SVM-12087 (5) Troubleshooting for remote controller <Primary check> Check that A or B selected on the main unit is matched with A or B selected on the remote controller. Push the [ ] button. The unit does not beep at all. Operation lamp on indoor unit is not indicated.
  • Page 65 FILE NO. SVM-12087 11-6. How to Check Simply the Main Parts 11-6-1. 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.
  • Page 66 FILE NO. SVM-12087 (3) Check procedures Table 11-6-1 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 67 FILE NO. SVM-12087 11-6-2. P.C. Board Layout +12V [1] Sensor characteristic table : Room temp. sensor TC, TCJ : Heat exchanger temp. sensor TA, TC, TCJ Temperature (°C) – 65 –...

  • Page 68: How To Simply Judge Whether Outdoor Fan Motor Is Good Or Bad

    11-6-3. Indoor Unit (Other Parts) FILE NO. SVM-12087 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 69: How To Replace The Main Parts

    FILE NO. SVM-12087 12. 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 70 FILE NO. SVM-12087 Part name Procedures Remarks Front panel 4) Press "PUSH" part under the front panel  and remove hooks of the front panel from the installation plate. Installation plate Front panel Press 5) Remove the front panel fixing screws. (4 pcs.) 6) Take off four hooks of panel from rear side.
  • Page 71 FILE NO. SVM-12087 Part name Procedures Remarks Electric parts ‚ 1) Remove screw of earth lead attached to the box assembly end plate of the evaporator. 2) 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 72 FILE NO. SVM-12087 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.) „ Evaporator 1) Follow to the procedure in the item ‚...
  • Page 73 FILE NO. SVM-12087 Part name Procedures Evaporator 4) Remove three fixing screw at the right (Heat exchanger) side of the heat exchanger, and separate the heat exchanger from the back body. (Figure 4, 5) One screw (Figure 4) One screw (Figure 5) Bearing 1) Follow to the procedure in the item...
  • Page 74 FILE NO. SVM-12087 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 75 FILE NO. SVM-12087 Part name Procedures Remarks Cross flow fan <Caution at reassembling> 1) To incorporate the fan motor incorporate the motor into the position in the following figure, and then install the fan motor. • Install the cross flow fan so that the right end of the 1st joint from the right of the cross flow fan is set keeping 5.0 mm from closed wall of the main unit.

  • Page 76: Exploded Views And Parts List

    FILE NO. SVM-12087 13-2. Indoor Unit (Part-E) Location Part Location Part Description Description 43T50308 SENSOR HEAT EXCHANGER 43T69893 PC BOARD ASSY 43T60331 TERMINAL; 3P 43T21434 STEPPING-MOTOR 43T69320 TEMPERATURE SENSOR 43T60386 MOTOR CORD 43T62003 CORD CLAMP 43T50320 SENSOR HEAT EXCHANGER 43T6V316 PC BOARD ASSY;WRS-LED –...
  • Page 77 TOSHIBA CARRIER (THAILAND) CO.,LTD.

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