Toshiba RAS-22SKV2-A1 Service Manual
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Toshiba RAS-22SKV2-A1 Service Manual

Toshiba split type air conditioner service manual
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SERVICE MANUAL

AIR-CONDITIONER
Indoor Unit
<High Wall, Heat Pump Type>
RAS-22SKV2-A1
Outdoor Unit
<Heat Pump Type>
RAS-22SAV2-A1
R410A
FILE NO. SVM-12002
SPLIT TYPE
February, 2012

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Summary of Contents for Toshiba RAS-22SKV2-A1

  • Page 1: Service Manual

    FILE NO. SVM-12002 SERVICE MANUAL AIR-CONDITIONER SPLIT TYPE Indoor Unit <High Wall, Heat Pump Type> RAS-22SKV2-A1 Outdoor Unit <Heat Pump Type> RAS-22SAV2-A1 R410A February, 2012...

  • Page 2: Table Of Contents

    FILE NO. SVM-12002 CONTENTS 1. SAFETY PRECAUTIONS ................3 2. SPECIFICATIONS ..................5 3. REFRIGERANT R410A ................7 4. CONSTRUCTION VIEWS ................ 15 5. WIRING DIAGRAM .................. 17 6. SPECIFICATIONS OF ELECTRICAL PARTS ......... 18 7. REFRIGERANT CYCLE DIAGRAM ............19 8.

  • Page 3: Safety Precautions

    FILE NO. SVM-12002 1. SAFETY PRECAUTIONS For general public use Power supply cord of outdoor unit shall be more than 1.5 mm ² (H07RN-F or 60245IEC66) polychloroprene sheathed flexible cord. • Read this “SAFETY PRECAUTIONS” carefully before servicing. • The precautions described below include the important items regarding safety. Observe them without fail. •...
  • Page 4 FILE NO. SVM-12002 • 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 5: Specifications

    − 10~46 / − 15~24 Outdoor (Cooling/Heating) Accessary Indoor unit Installation plate Wireless remote controller Batteries Remote controller holder Toshiba New IAQ filter 6 (∅4 x 25L) Mounting screw Pan head wood screw 2 (∅3.1 x 16L) Plasma air purifier Installation manual Owner's manual...

  • Page 6: Operation Characteristic Curve

    FILE NO. SVM-12002 2-2. Operation Characteristic Curve <Cooling> <Heating> Conditions Conditions Indoor : DB 27 C/WB 19 Indoor : DB 20 Outdoor : DB 35 Outdoor : DB 7 C/WB 6 Air Flow : High Air Flow : High Pipe Length : 7.5m Pipe Length : 7.5m Voltage : 240V Voltage : 240V...

  • Page 7: Refrigerant R410A

    FILE NO. SVM-12002 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-12002 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-12002 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-12002 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-12002 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-12002 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: Brazing Of Pipes

    FILE NO. SVM-12002 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-12002 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-12002 4. CONSTRUCTION VIEWS 4-1. Indoor Unit 1050 Air filter Air inlet Front panel Heat exchanger Knock out system Knock out system 72 78 Installation plate hanger Wireless remote controller Remote controller holder Installation plate hanger Connecting plate (0.39m) Drain hose Connecting pipe (0.49m) Flare Ø12.70mm...

  • Page 16: Outdoor Unit

    FILE NO. SVM-12002 4-2. Outdoor Unit 6 hole R5.5 A detail drawing (Back leg) 6 hole 11x14 hole 25 Drain outlet 11x14 Hole (For 10 anchor bolt) B detail drawing (Front leg) FAN-GUARD COVER-PV View Z Electrical part Liquid side (Flare 6.35) Gas side...

  • Page 17: Wiring Diagram

    FILE NO. SVM-12002 5. WIRING DIAGRAM 5-1. Indoor Unit / Outdoor Unit Compressor Q200 ~ 205 Q300 ~ 305 IGBT MOS-FET CN300 Fan Motor R221 R321 R220 R320 CN700 R219 R319 Pulse Motor Valve CN603 P . C. Board (TS) MCC-5009 Suction pipe Temp.

  • Page 18: Specifications Of Electrical Parts

    FILE NO. SVM-12002 6. SPECIFICATIONS OF ELECTRICAL PARTS 6-1. Indoor Unit Parts name Type Specifications Fan motor (for indoor) ICF-340-30-2Β DC340V, 30W Room temp. sensor (TA-sensor) ( — ) 10kΩ at 25°C Heat exchanger temp. sensor (TC-sensor) ( — ) 10kΩ...

  • Page 19: Refrigerant Cycle Diagram

    FILE NO. SVM-12002 7. REFRIGERANT CYCLE DIAGRAM 7-1. Refrigerant Cycle Diagram T1 Temp. measurement INDOOR UNIT Indoor heat exchanger Cross flow fan Max. : 20m Min. : 2m Chargeless : 15m Pressure measurement Deoxidized copper pipe Charge : 20g/m Gauge attaching port Outer dia.

  • Page 20: Operation Data

    FILE NO. SVM-12002 7-2. Operation Data <Cooling> Tempeature Standard Heat exchanger Indoor Outdoor Compressor condition(°C) pressure pipe temp. fan mode fan mode revolution Indoor Outdoor P (MPa) T1 (°C) T2 (°C) (rps) 27/19 35/24 0.9 to 1.1 11 to 13 41 to 43 High High...

  • Page 21: Control Block Diagram

    FILE NO. SVM-12002 8. CONTROL BLOCK DIAGRAM 8-1. Indoor Unit Indoor Unit Control Unit 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 and Indication •...
  • Page 22 FILE NO. SVM-12002 8-2. Outdoor Unit (Inverter Assembly) – 22 –...

  • Page 23: Operation Description

    FILE NO. SVM-12002 9. OPERATION DESCRIPTION • Detection of inverter input current and current 9-1. Outline of Air Conditioner Control 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 24 FILE NO. SVM-12002 9-2. Operation Description 9-2. 1. Basic operation ......................25 1. Operation control ....................25 2. Cooling/Heating operation ..................26 3. AUTO operation...................... 26 4. DRY operation ......................26 2. Indoor fan motor control ....................27 3. Outdoor fan motor control ................... 29 4.

  • Page 25: Basic Operation

    FILE NO. SVM-12002 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 26: Cooling/Heating Operation

    FILE NO. SVM-12002 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 27: Indoor Fan Motor Control

    FILE NO. SVM-12002 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 28 FILE NO. SVM-12002 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 29: Outdoor Fan Motor Control

    FILE NO. SVM-12002 Item Operation flow and applicable data, etc. Description 3. Outdoor fan The blowing air volume at the outdoor unit side is controlled. 1) The operation command sent motor control from the remote controller is Receiving the operation command from the controller of processed by the indoor unit indoor unit, the controller of outdoor unit controls fan speed.

  • Page 30: Capacity Control

    FILE NO. SVM-12002 Item Operation flow and applicable data, etc. Description 4. 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 31: Release Protective Control By Temperature Of Indoor Heat Exchanger

    FILE NO. SVM-12002 Item Operation flow and applicable data, etc. Description 6. 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 32: Defrost Control (Only In Heating Operation)

    FILE NO. SVM-12002 Item Operation flow and applicable data, etc. Description 7. Defrost control (This function removes frost adhered to the outdoor The necessity of defrost operation is (Only in heating heat exchanger.) detected by the outdoor heat exchanger operation) temperature.

  • Page 33: Louver Control

    FILE NO. SVM-12002 Item Operation flow and applicable data, etc. Description 8. 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 34: Eco Operation

    * 10 (DRY max - COOL min) /6 × 3 + COOL min * 9 (DRY max - COOL min) /6 × 2 + COOL min * 8 (DRY max - COOL min) /6 × 1 + COOL min RAS-22SKV2-A1 Cool min DRY max <Heating operation>...

  • Page 35: Temporary Operation

    FILE NO. SVM-12002 Item Operation flow and applicable data, etc. Description 10. Temporary Pushing [RESET] button starts the temporary 1) When pushing [RESET] button, the operation operation of [AUTO] operation. When keeping temporary [AUTO] operation starts. [RESET] button pushed for 10 seconds or more, the 2) When keeping [RESET] button pushed for temporary [COOL] operation is performed.

  • Page 36: Self-Cleaning Function

    FILE NO. SVM-12002 Item Operation flow and applicable data, etc. Description 12. 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. Unit now performing cooling or dry operation Self-Cleaning operation When the cooling or dry operation shuts...

  • Page 37: Remote Controller-A Or B Selection

    FILE NO. SVM-12002 Item Operation flow and applicable data, etc. Description 12. 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 38: Quiet Mode

    FILE NO. SVM-12002 Item Operation flow and applicable data, etc. Description 14. 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 39: One Touch Comfort

    FILE NO. SVM-12002 Item Operation flow and applicable data, etc. Description 17. 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 40: Auto Restart Function

    FILE NO. SVM-12002 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 41: How To Cancel The Auto Restart Function

    FILE NO. SVM-12002 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 42: 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 Push ONE-TOUCH : Start the operaton.
  • Page 43 FILE NO. SVM-12002 4. DRY OPERATION (COOLING ONLY) For dehumidification, a moderate cooling performance is controlled automatically. 1. Push MODE : Select Dry 2. Push MODE : Set the desired temperature. TEMP 5. Hi POWER OPERATION To automatically control room temperature and airflow for faster cooling or heating operation (except in DRY and FAN ONLY mode) Push Hi-POWER : Start and stop the operation.
  • Page 44 FILE NO. SVM-12002 Note: • Keep the remote controller in accessible transmission to the indoor unit; otherwise, the time lag of up to 15 minutes will occur. • The setting will be saved for the next same operation. 9. PRESET OPERATION Set your preferred operation for future use.

  • Page 45: Names And Functions Of Indications On Remote Controller

    FILE NO. SVM-12002 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 46: Installation Procedure

    Do not allow the drain hose to get slack. Cut the piping hole sloped slightly. Shield pipe Make sure to run the drain hose TOSHIBA New IAQ filter sloped downward. Batteries TOSHIBA New IAQ filter The auxiliary piping can be connected Wireless remote control to the left, rear left, rear right, right, bottom right or bottom left.
  • Page 47 FILE NO. SVM-12002 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 : ∅12.7 mm Pipe insulating material (polyethylene foam, 8 mm thick) Putty, PVC tapes each <Fixing bolt arrangement of outdoor unit> 125 mm 29 mm Air inlet...
  • Page 48 ∅ 3.1 x 16 Installation plate x 1 Remote control holder x 1 Wireless remote control x 1 TOSHIBA New IAQ filter x 2 Screw ∅ 4 x 10 x 2 Battery x 2 TOSHIBA New IAQ filter x 2 Drain nipple∗...
  • Page 49 FILE NO. SVM-12002 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 50: Indoor Unit

    FILE NO. SVM-12002 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 Drilling a hole the indoor unit as shown in the diagram. When install the refrigerant pipes from the rear. •...
  • Page 51 FILE NO. SVM-12002 10-3-3. Electrical Work When the installation plate is directly mounted on the wall 1. The supply voltage must be the same as the rated voltage of the air conditioner. 1. Securely fit the installation plate onto the wall by 2.
  • Page 52 FILE NO. SVM-12002 10-3-5. Piping and Drain Hose Installation CAUTION Piping and drain hose forming • Be sure to refer to the wiring system diagram labeled inside the front panel. • Since condensation results in machine trouble, • Check local electrical regulations for any make sure to insulate both the connecting pipes specific wiring instructions or limitations.
  • Page 53 FILE NO. SVM-12002 How to attach the drain cap In case of bottom right or bottom left piping 1. Insert hexagonal wrench (4 mm). • After making slits on the front panel with a knife or similar tool, cut them out with a pair of nippers or an equivalent tool.
  • Page 54 FILE NO. SVM-12002 10-3-7. Drainage CAUTION 1. Run the drain hose at a downward sloped angle. • Bind the auxiliary pipes (two) and connecting cable with facing tape tightly. NOTE : In case of leftward piping and rear-leftward • Hole should be made at a slight downward slant piping, bind the auxiliary pipes (two) only with facing tape.
  • Page 55 FILE NO. SVM-12002 10-4. Outdoor Unit Precautions for adding refrigerant 10-4-1. Installation Place • Use a scale having a precision with at least 10 g per index line when adding the refrigerant. • A place which provides enough space around the outdoor unit as shown in the diagram.
  • Page 56 FILE NO. SVM-12002 Tightening Connection Use a vacuum pump Align the centers of the connecting pipes and tighten Be sure to use a vacuum pump with counter-flow the flare nut as much as possible with your fingers. prevention function so that oil inside the pump does Then tighten the nut with a wrench and torque not flow back into the air conditioner pipes when the wrench as shown in the figure.
  • Page 57 FILE NO. SVM-12002 10-4-2. Draining the Water 10-4-3. Refrigerant Piping Connection • Holes are provided on the base plate of the Flaring outdoor unit to ensure that the defrost water produced during heating operations is drained off 1. Cut the pipe with a pipe cutter. efficiently.
  • Page 58 FILE NO. SVM-12002 Revi110 Packed Valve handling precautions • Open the valve stem all the way; but do not try to open it beyond the stopper. 1 2 3 • Securely tighten the valve stem cap with torque in the following table: Gas side (Ø12.7 mm) 50 to 62 N•m (5.0 to 6.2 kgf•m) Earth line...

  • Page 59: Test Operation

    FILE NO. SVM-12002 10-5. Test Operation 10-5-4. Remote Controller A or B Selection Setting 10-5-1. Gas Leak Test When two indoor units are installed in the • Check the flare nut connections for gas leaks with separated rooms, it is not necessary to change a gas leak detector and/or soapy water.

  • Page 60: How To Diagnose The Trouble

    FILE NO. SVM-12002 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 Troubleshooting Procedure First Confirmation...
  • Page 61 FILE NO. SVM-12002 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. Take sufficient care to avoid directly touching any of the circuit parts without first turning off the power.

  • Page 62: First Confirmation

    FILE NO. SVM-12002 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 63: Primary Judgment

    FILE NO. SVM-12002 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 64: Self-Diagnosis By Remote Controller (Check Code)

    Push [CHECK] button with a tip of pencil to set the remote controller to the service mode. • “ ” is indicated on the display of the remote controller. TOSHIBA Push [ON ] or [OFF ] button If there is no fault with a code, the indoor unit will beep...
  • Page 65 FILE NO. SVM-12002 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 66 FILE NO. SVM-12002 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 67 FILE NO. SVM-12002 Block distinction Operation of diagnosis function Judgment and action Check Check Block Cause of operation conditioner Remarks code code status Outdoor Inverter over-current All off Displayed when Even if trying operation again, all P.C. board protective circuit operates. error is detected.

  • Page 68: Judgement Of Trouble By Every Symptom

    FILE NO. SVM-12002 11-5. Judgement of Trouble by Every Symptom 11-5-1. Indoor unit (Including remote controller) Operation (1) Indoor unit is not operated. Check Item Considerable principle cause Turn off power supply once, and Measures 5 second later, turn it on again. Item by symptoms Is OPERATION indicator flashing? Is it possible to turn on...
  • Page 69 FILE NO. SVM-12002 (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...
  • Page 70 FILE NO. SVM-12002 Is it possible to Does check display Replace change airflow level remote on remote show high? to “HIGH”? Change the new PC Replace board. Does fan speed motor change? Fan motor operates normally. Is it possible to Does check cross-flow Replace bearing rotate cross-flow fan by...
  • Page 71 FILE NO. SVM-12002 (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 72 FILE NO. SVM-12002 (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. The unit does not beep at all. Push the [ ] button.
  • Page 73 FILE NO. SVM-12002 11-5-2. 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 74 FILE NO. SVM-12002 11-6. Check Code 1C (Miswiring in indoor/outdoor units) and 1E <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 75: How To Diagnose Trouble In Outdoor Unit

    FILE NO. SVM-12002 11-7. How to Diagnose Trouble in Outdoor Unit Check Power Supply (Voltage Rate ±10%) Turn OFF power supply. Remove connector of compressor. • Connect discharge Check 25A resistance (approx. 100Ω, fuse (F01) 40W) or soldering iron failure? (plug) between +, –...
  • Page 76 FILE NO. SVM-12002 Does outdoor fan operate normally? Turn OFF power supply. Does compresser operate normally? Remove connector CN300 of outdoor fan motor. Check winding resistance by ohmmeter are correct? Compressor Check rotor locking by rotate is normal with hand. Can it rotate? Turn OFF power supply.

  • Page 77: How To Check Simply The Main Parts

    FILE NO. SVM-12002 11-8. How to Check Simply the Main Parts (2) Inspection procedures 1) When a P.C. board is judged to be defective, 11-8-1. How to check the P.C. board (Indoor unit) check for disconnection, burning, or discolora- tion of the copper foil pattern or this P.C. board. (1) Operating precautions 2) The P.C.
  • Page 78 FILE NO. SVM-12002 11-8-2. P.C. Board Layout +12V [1] Sensor characteristic table TD : Discharge temp. sensor TA : Room temp. sensor TC : Heat exchanger temp. sensor TO : Outdoor temp. sensor TA, TC, TO, TE, TS TE : Outdoor heat exchanger temp. sensor TS : Suction temp.
  • Page 79 FILE NO. SVM-12002 11-9-3. 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 80 FILE NO. SVM-12002 11-9-5. Checking Method for Each Part Part name Checking procedure Electrolytic capacitor 1. Turn OFF the power supply breaker. (For boost, smoothing) 2. Discharge all three capacitors completely. 3. Check that safety valve at the bottom of capacitor is not broken. 4.
  • Page 81 FILE NO. SVM-12002 11-10. 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 10 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 82: How To Replace The Main Parts

    FILE NO. SVM-12002 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 83 FILE NO. SVM-12002 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 84 FILE NO. SVM-12002 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 85 FILE NO. SVM-12002 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 86 FILE NO. SVM-12002 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 87 FILE NO. SVM-12002 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 88 FILE NO. SVM-12002 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 89 FILE NO. SVM-12002 10-2. Outdoor Unit Part name Procedure Remarks  Common 1. Detachment procedure Upper cabinet NOTE Wear gloves for this job. Otherwise, you may injure your hands on the parts, etc. Waterproof cover 1) Stop operation of the air conditioner, and turn off the main switch of the breaker for air conditioner.
  • Page 90 FILE NO. SVM-12002 Part name Procedure Remarks ‚ Front cabinet 1. Detachment  1) Perform step 1 in 2) Remove the fixing screws (ST1TØ4 × 10L 2 pcs.) used to secure the front cabinet and inverter cover, the screws (ST1TØ4 ×...
  • Page 91 FILE NO. SVM-12002 Part name Procedure Remarks  ƒ Inverter 1) Perform work of item 1 in Inverter cover assembly 2) Remove screw (ST1TØ4 × 10L 2 pcs.) of the P.C. board upper part of the front cabinet. (Soldered surface) •...
  • Page 92 FILE NO. SVM-12002 Part name Procedure Remarks „ Control board 1. Disconnect the leads and connectors connected to assembly the other parts from the control board assembly. 1) Leads CN603 • 3 leads (black, white, orange) connected to terminal block. CN601 CN600 CN701...
  • Page 93 FILE NO. SVM-12002 Part name Procedure Remarks … Side cabinet 1. Side cabinet (right) ‚ 1) Perform step 1 in and all the steps in ƒ 2) Remove the fixing screw (ST1TØ4 × 10L 3 pcs.) used for securing the side cabinet to the bottom plate and valve fixing panel.
  • Page 94 FILE NO. SVM-12002 Part name Procedure Remarks  ‚ ƒ „ ‡ Compressor 1) Perform work of item 1 of … 2) Extract refrigerant gas. 3) Remove the partition board. (ST1TØ4 × 10L 4 pcs.) 4) Remove the sound-insulation material. 5) Remove terminal cover of the compressor, and disconnect lead wire of the compressor from the terminal.
  • Page 95 FILE NO. SVM-12002 Part name Procedure Remarks ‰ Electronic 1. Detachment expansion valve ‚ ƒ 1) Perform step 1 in , all the steps in coil … and 1 in 2) Remove the coil by pull it upward. 2. Attachment 1) Insert a valve coil to value body by push it downward.
  • Page 96 FILE NO. SVM-12002 Part name Procedure Remarks TE sensor (outdoor heat exchanging temperature sensor) • Attachment Install the sensor onto the straight pipe part of the condenser output pipe. Arrow D Straight Part Sensor lead Detail C Detail B Detail C Detail A TS sensor (Suction pipe temperature sensor) •...
  • Page 97 FILE NO. SVM-12002 Part name Procedure Remarks Replacement of 1) Cut the sensor 100 mm longer than old temperature sensor one. Cutting here Thermal for servicing only Connector sensor part 2) Cut the protective tube after pulling out it (200 mm). Common service 3) Move the protective tube toward the Cutting here...

  • Page 98: Exploded Views And Parts List

    43T39022 BAND, MOTOR, RIGHT UP 43T20016 FAN, ASSY, CROSS FLOW 43T09040 LOUVER, HORIZONTAL 43T49010 PIPE, SHIELD 43T03014 BODY ASSY, BACK 43T83003 HOLDER, REMOTE CONTROL 43T09041 GRILLE ASSY, SUB TOSHIBA 43T82008 PLATE, INSTALLATION 43T80331 FILTER-AIR 43T19333 HOLDER, SENSOR 43T00052 PANEL ASSY, SERVICE 43T49043 HOLDER, PIPE...
  • Page 99 FILE NO. SVM-12002 13-2. Indoor Unit (Part-E) Location Part Location Part Description Description 43T50308 SENSOR HEAT EXCHANGER 43T69736 PC BOARD ASSY;WRS-LED 43T60331 TERMINAL; 3P 43T69966 PC BOARD ASSY 43T69320 TEMPERATURE SENSOR 43T21397 STEPPING-MOTOR 43T62003 CORD CLAMP 43T60386 MOTOR CORD – 99 –...
  • Page 100 FILE NO. SVM-12002 13-3. Outdoor Unit Location Part Location Part Description Description 43T00559 FRONT CABINET 43T63338 COIL-PMV 43T00560 LEFT CABINET 43T58311 REACTOR 43T42345 BASE PLATE ASSEMBLY 43T20331 PROELLER FAN 43T00561 UPPER CABINET 43T21375 FAN MOTOR 43T19349 FAN GUARD 43T47001 NUT FLANGE 43T00562 PACKED VALVE COVER ASSEMBLY 43T97001 NUT 43T19350 HANDLE...
  • Page 101 FILE NO. SVM-12002 13-4. Outdoor Unit (Part-E) Location Part Location Part Description Description 43T62331 HEATSINK 43T60377 TEMPERATURE SENSOR 43T69965 PC BOARD 43T50304 SENSOR;HEAT EXCHANGER 43T60392 TERMINAL-5P 43T62313 BASE-PLATE-PC 43T60326 FUSE – 101 –...
  • Page 102 TOSHIBA CARRIER (THAILAND) CO.,LTD. 144/9 MOO 5, BANGKADI INDUSTRIAL PARK, TIVANON ROAD, TAMBOL BANGKADI, AMPHUR MUANG, PATHUMTHANI 12000, THAILAND.

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