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Toshiba RAS-10SKVR-E2 Service Manual
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Toshiba RAS-10SKVR-E2 Service Manual

Air conditioner split type
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FILE NO. SVM-10029

SERVICE MANUAL

SPLIT TYPE
Indoor Unit
Outdoor Unit
<High Wall, Heat Pump Type>
<Heat Pump Type>
RAS-10SKVR-E2 / RAS-10SAVR-E2
R410A
March, 2010

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Summary of Contents for Toshiba RAS-10SKVR-E2

  • Page 1: Service Manual

    FILE NO. SVM-10029 SERVICE MANUAL SPLIT TYPE Indoor Unit Outdoor Unit <High Wall, Heat Pump Type> <Heat Pump Type> RAS-10SKVR-E2 / RAS-10SAVR-E2 R410A March, 2010...

  • Page 2: Table Of Contents

    FILE NO. SVM-10029 CONTENTS 1. SAFETY PRECAUTIONS ................2 2. SPECIFICATIONS ..................4 3. REFRIGERANT R410A ................6 4. CONSTRUCTION VIEWS ................ 14 5. WIRING DIAGRAM .................. 16 6. SPECIFICATIONS OF ELECTRICAL PARTS ......... 17 7. REFRIGERANT CYCLE DIAGRAM ............18 8.

  • Page 3: Safety Precautions

    FILE NO. SVM-10029 1. SAFETY PRECAUTIONS For general public use Power supply cord of outdoor unit shall be more than 1.5 mm (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-10029 • 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 REGISTORS, FURNACE, STOVES, ETC.

  • Page 5: Specifications

    2. SPECIFICATIONS Unit model Indoor RAS-10SKVR-E2 Outdoor RAS-10SAVR-E2 Cooling capacity (kW) Cooling capacity range (kW) 1.1 - 3.1 Heating capacity (kW) Heating capacity range (kW) 0.9 - 4.8 Power supply 1Ph/50Hz/220-240V, 1Ph/60Hz/220-230V Electric Indoor Operation mode Cooling Heating characteristic Running current 0.21 - 0.19...
  • Page 6 FILE NO. SVM-10029 2-2. Operation Characteristic Curve <Cooling> <Heating> 10 20 30 40 50 60 70 80 90 100 110 120 90 100 110 120 Compressor speed (rps) Compressor speed (rps) 2-3. Capacity Variation Ratio According to Temperature <Heating> <Cooling> Capacity ratio 100% is 2.5kW Capacity ratio 100% is 3.2kW Conditions...

  • Page 7: Refrigerant R410A

    FILE NO. SVM-10029 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-10029 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-10029 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-10029 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 16.2 16.0 12.9 15.88 19.7 19.0 16.0 19.05 23.3 24.0 19.2 Fig.
  • Page 11 FILE NO. SVM-10029 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-10029 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-09041 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-10029 2. Characteristics required for flux 3-5-3. Brazing • Activated temperature of flux coincides with the As brazing work requires sophisticated techniques, brazing temperature. experiences based upon a theoretical knowledge, it must be performed by a person qualified. •...

  • Page 15: Construction Views

    FILE NO. SVM-10029 4. CONSTRUCTION VIEWS 4-1. Indoor Unit Air inlet Plasma air purifier Air filter Front panel Heat exchanger Air ionizer Knock out system Knock out system Installation plate hanger Wireless remote controller Installation plate hanger Drain hose (0.50m) Remote controller holder Connecting pipe (0.35m) Connecting pipe (0.40m)

  • Page 16: Outdoor Unit

    FILE NO. SVM-10029 4-2. Outdoor Unit Ø6 hole R5.5 Ø6 hole Ø11x14 hole A detail Drawing (Back leg) Ø 11 x 14 Hole Ø 25 Drain outlet B Detail Drawing (Front leg) (For 8 - 10 anchor bolt) Ø Ø FAN-GUARD Ø...

  • Page 17: Wiring Diagram

    FILE NO. SVM-10029 5. WIRING DIAGRAM Air purifier Electrode Electrode 1 2 3 Outdoor Terminal Block High-voltage 1 2 3 Indoor Terminal Block Heat Power Supply Exchanger POWER SUPPLY GRN&YEL (From outdoor Unit) 1 220-240V~ 50Hz 1 220-230V~ 60Hz SHEET METAL Micro SW (RED) CN02...

  • Page 18: Specifications Of Electrical Parts

    FILE NO. SVM-10029 6. SPECIFICATIONS OF ELECTRICAL PARTS 6-1. Indoor Unit Part s n ame Type Specif icat io ns Fan motor (for indoor) AFN-220-20-4D AC240V, 20W Ω Room temp. sensor (TA-sensor) ( - ) at 25°C Heat exchanger temp. sensor (TC-sensor) 10kΩ...

  • Page 19: Refrigerant Cycle Diagram

    FILE NO. SVM-10029 7. REFRIGERANT CYCLE DIAGRAM 7-1. Refrigerant Cycle Diagram Temp. measurement INDOOR UNIT Indoor heat exchanger Cross flow fan Max. : 20m Min. : 2m Pressure measurement Chargeless : 15m Deoxidized copper pipe Gauge attaching port Outer dia. : 6.35mm Charge : 20g/m Vacuum pump connecting port Thickness : 0.8mm...

  • Page 20: Operation Data

    FILE NO. SVM-10029 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/- 0.9 to 1.1 12 to 14 37 to 39 High High...

  • Page 21: Control Block Diagram

    FILE NO. SVM-10029 8. CONTROL BLOCK DIAGRAM 8-1. Indoor 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 22 FILE NO. SVM-10029 8-2. Outdoor Unit (Inverter Assembly) – –...

  • Page 23: Operation Description

    FILE NO. SVM-10029 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 AC or DC motor for the indoor to IGBT module (Compressor stop function) for motor and the outdoor fan motor.
  • Page 24 FILE NO. SVM-10029 9-2. Operation Description 1. Basic operation ......................24 1. Operation control ....................24 2. Cooling/Heating operation ..................25 3. AUTO operation ..................... 25 4. DRY operation ......................25 2. Indoor fan motor control ..................... 26 3. Outdoor fan motor control ................... 28 4.

  • Page 25: Basic Operation

    FILE NO. SVM-10029 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-10029 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-10029 Item Operation flow and applicable data, etc. Description 2. Indoor fan <In cooling operation> motor control (This operation controls the fan speed at indoor unit side.) * Symbols The indoor fan (cross flow fan) is operated by the phase- : Ultra High control induction motor.
  • Page 28 FILE NO. SVM-10029 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-10029 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-10029 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-10029 Item Operation flow and applicable data, etc. Description 6. 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 32: Defrost Control (Only In Heating Operation)

    FILE NO. SVM-10029 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-10029 Item Operation flow and applicable data, etc. Description 8. 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 34: Eco Operation

    FILE NO. SVM-10029 Item Operation flow and applicable data, etc. Description 9. ECO When pressing [ECO] button on the remote controller, a <Cooling operation> operation Economic operation is performed. 1) The control target temperature <Cooling operation> increase 0.5ºC per hour up to 2ºC This function operates the air conditioner with the difference starting from the set temperature between the set and the room temperature as shown in the...

  • Page 35: Temporary Operation

    FILE NO. SVM-10029 Item Operation flow and applicable data, etc. Description 10. 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 36: Discharge Temperature Control

    FILE NO. SVM-10029 Item Operation flow and applicable data, etc. Description 11. Air purifying control [Detection of abnormality] 1. Purpose The air purifying control function is to alert the user to trouble in the ionizing or Purifying operation air purifying operation. 2.

  • Page 37: Pulse Modulating Valve (P .M.v.) Control

    FILE NO. SVM-10029 Item Operation flow and applicable data, etc. Description 13. Pulse This function controls throttle amount of the 1) When starting the operation, move the Modulating refrigerant in the refrigerating cycle. valve once until it fits to the stopper. valve (P.M.V.) (Initialize) According to operating status of the air conditioner,...

  • Page 38: Self-Cleaning Function

    FILE NO. SVM-10029 Item Operation flow and applicable data, etc. Description 14. 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 39: Remote-A Or B Selection

    FILE NO. SVM-10029 Item Operation flow and applicable data, etc. Description • Self-Cleaning diagram 14. Self-Cleaning function Operation display FCU fan rpm is depend on presetting. (500RPM) FCU louver OPEN OPEN (12.7º) CLOSE ON or OFF ON or OFF Timer display depend on presetting of timer function.

  • Page 40: Quiet Mode

    FILE NO. SVM-10029 Item Operation flow and applicable data, etc. Description 16. 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 41: One-Touch Comfort

    FILE NO. SVM-10029 Item Operation flow and applicable data, etc. Description 19. 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 42: Auto Restart Function

    FILE NO. SVM-10029 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 three minutes after power is restored.

  • Page 43: How To Cancel The Auto Restart Function

    FILE NO. SVM-10029 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 three times. The unit will be required to be turned on with the remote controller after the main power supply is turned off. •...

  • Page 44: Remote Controller And Its Fuctions 9-4-1. Parts Name Of Remote Contr Oller

    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 ONE-TOUCH : Start the operaton.
  • Page 45 FILE NO. SVM-10029 4. DRY OPERATION (COOLING ONLY) For dehumidification, a moderate cooling performance is controlled automatically. 1. Press MODE : Select Dry 2. Press MODE : Set the desired temperature. 5. AIR PURIFYING OPERATION (RAS-10,13,16SKVR-E Only) During air conditioner operation Press PURE to start and air ionizer operation.
  • Page 46 FILE NO. SVM-10029 Note: · Keep the remote control 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. 10. PRESET OPERATION Set your preferred operation for future use.

  • Page 47: Name And Functions Of Indications On Remote Controller

    FILE NO. SVM-10029 9-4-3. Name and Functions of Indications on Remote Controller [Display] All indications, except for the clock time indicator, are displayed by pressing the button. Transmission mark TIMER and clock time indicator This transmission mark indicates when the The time setting for timer operation or the clock remote controller transmits signals to the indoor time is indicated.

  • Page 48: Installation Procedure

    FILE NO. SVM-10029 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.
  • Page 49 FILE NO. SVM-10029 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 : ∅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 50 FILE NO. SVM-10029 10-2-2. Accessory and installation parts Part Part Part Part name (Q’ty) Part name (Q’ty) Part name (Q’ty) Mounting screw ∅4 x 25 s x 6 Installation plate x 1 Remote control holder x 1 Flat head wood screw ∅3.1 x 16 s x 2 Wireless remote control x 1 Filter (RB-A620DE) x 1...
  • Page 51 FILE NO. SVM-10029 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 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 52: Indoor Unit

    FILE NO. SVM-10029 10-3. Indoor Unit 10-3-2. Drilling a Hole and Mounting Instal- lation Plate 10-3-1. Installation Place • A place which provides enough spaces around the Drilling a hole indoor unit as shown in the diagram. When install the refrigerant pipes from the rear. •...
  • Page 53 FILE NO. SVM-10029 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 54 FILE NO. SVM-10029 CAUTION 1. Die-cutting front panel slit CAUTION Cut out the slit on the left or right side of the front • Be sure to refer to the wiring system diagram panel for the left or right connection and the slit labeled inside the front panel.
  • Page 55 FILE NO. SVM-10029 2. Firmly insert drain cap. Left-hand connection with piping Bend the connecting pipes so that they are posi- tioned within 43 mm above the wall surface. No gap If the connecting pipes are positioned more than Do not apply lubricating oil 43 mm above the wall surface, the indoor unit may (refrigerant machine oil) be unstable.
  • Page 56 FILE NO. SVM-10029 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 on the outdoor side.
  • Page 57 FILE NO. SVM-10029 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 58 FILE NO. SVM-10029 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 59 FILE NO. SVM-10029 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 60 FILE NO. SVM-10029 Packed Valve handling precautions • Open the valve stem all the way; but do not try to open it beyond the stopper. • 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) Gas side (Ø9.52 mm) 33 to 42 N•m (3.3 to 4.2 kgf•m)

  • Page 61: Test Operation

    FILE NO. SVM-10029 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 separated rooms, it • Check the flare nut connections for gas leaks with is not necessary to change the selector switches. a gas leak detector and/or soapy water.

  • Page 62: How To Diagnose The Trouble

    FILE NO. SVM-10029 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...
  • Page 63 FILE NO. SVM-10029 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 64: First Confirmation

    FILE NO. SVM-10029 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 65: Primary Judgment

    FILE NO. SVM-10029 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 66 Press [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 Press [ON ] or [OFF ] button If there is no fault with a code, the indoor unit will beep...
  • Page 67 FILE NO. SVM-10029 11-4-2. Caution at Servicing 1. After servicing, press the START/STOP 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 68 FILE NO. SVM-10029 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 69: Judgment Of Trouble By Every Symptom

    FILE NO. SVM-10029 11-5. Judgment of Trouble by Every Symptom 11-5-1. 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 70 FILE NO. SVM-10029 (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 71 FILE NO. SVM-10029 (4) Indoor fan motor automatically starts to rotate by turning on power supply <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 72 FILE NO. SVM-10029 (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. There is no beep from the indoor unit Push the [ ] button.
  • Page 73 FILE NO. SVM-10029 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-10029 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: Troubleshooting

    FILE NO. SVM-10029 11-7. Troubleshooting 11-7-1. How to Check Whether the Air Purifier is Good or Not Turn off the power breaker once, and turn on again after 10 seconds. Does the OPERATION indicator flash? To item “Power supply is not turned on” Turn off the power breaker and remove CN41 (Micro switch connector).
  • Page 76 FILE NO. SVM-10029 11-7-2. How to Check Whether the Minus Ion Generator is Good or Not Turn off the power breaker once, and turn on again after 10 seconds. Does the OPERATION indicator flash? To item “Power supply is not turned on” Turn off the power breaker and remove CN41 (Micro switch connector).

  • Page 77: How To Diagnose Trouble In Outdoor Unit

    FILE NO. SVM-10029 11-8. How to Diagnose Trouble in Outdoor Unit 11-8-1. Summarized Inner Diagnosis of Inverter Assembly Table 11-8-1 Diagnosis/Process flowchart Item Contents Summary Preparation Turn “OFF” the power supply breaker, and remove 3P Remove connector connector which connects of compressor.

  • Page 78: How To Check Simply The Main Parts

    FILE NO. SVM-10029 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 79 FILE NO. SVM-10029 (3) Check procedures Table 11-9-1 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 80 FILE NO. SVM-10029 11-9-2. 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.
  • Page 81 FILE NO. SVM-10029 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 82 FILE NO. SVM-10029 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 83: How To Simply Judge Whether Outdoor Fan Motor Is Good Or Bad

    FILE NO. SVM-10029 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 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 84: How To Replace The Main Parts

    FILE NO. SVM-10029 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 85 FILE NO. SVM-10029 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 86 FILE NO. SVM-10029 Part name Procedures Remarks  ‚ High voltage 1) Follow to the procedure in the item generator 2) To remove the air ionizer from the back body, pull it toward you. 3) Disconnect the connectors of the high voltage generator.
  • Page 87 FILE NO. SVM-10029 Part name Procedures Remarks ‚ ƒ 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 88 FILE NO. SVM-10029 Part name Procedures Remarks „ 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 (Heat exchanger) 2) Remove the pipe holder from the rear side of the main unit.
  • Page 89 FILE NO. SVM-10029 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 90 FILE NO. SVM-10029 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 91 FILE NO. SVM-10029 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 92 FILE NO. SVM-10029 12-3. Outdoor Unit Part name Procedure Remarks  Common 1. Detachment procedure NOTE Upper cabinet 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 93 FILE NO. SVM-10029 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 94 FILE NO. SVM-10029 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 95 FILE NO. SVM-10029 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 96 FILE NO. SVM-10029 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 4 pcs.) used for securing the side cabinet to the bottom plate and valve fixing panel.
  • Page 97 FILE NO. SVM-09041 Part name Procedure Remarks  ‚ ƒ „ ‡ Compressor 1) Perform work of item 1 of … 2) Extract refrigerant gas. 3) Remove the partition board. (ST1TØ4 × 10L 3 pcs.) 4) Remove the sound-insulation material. 5) Remove terminal cover of the compressor, and disconnect lead wire of the compressor Partition...
  • Page 98 FILE NO. SVM-10029 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 99 FILE NO. SVM-10029 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 Detail B Detail C Detail A Detail C TS sensor (Suction pipe temperature sensor) •...
  • Page 100 FILE NO. SVM-10029 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 101: Exploded Views And Parts List

    FILE NO. SVM-10029 13. EXPLODED VIEWS AND PARTS LIST 13-1. Indoor Unit Location Part Location Part Description Description 43T21397 LOUVER MOTOR (Made in Thailand) 43T39327 BEARING BASE 43T21409 FAN MOTOR (Made in Thailand) 43T39328 MOTOR BAND (LEFT) (Made in Thailand) 43T22312 BEARING ASSY, MOLD (Made in Thailand) 43T39329...
  • Page 102 FILE NO. SVM-10029 13-2. Indoor Unit (E-Parts) Location Part Location Part Description Description 43T69319 TEMPERATURE SENSOR 43T62003 CORD CLAMP (Made in Thailand) 43T60395 TERMINAL 43T69650 PC BOARD ASSY,WRS-LED 43T69320 TEMPERATURE SENSOR 43T69654 PC BOARD (Made in Thailand) 43T51308 SWITCH ASSY,MICRO –...
  • Page 103 FILE NO. SVM-10029 13-3. Outdoor Unit Location Part Location Part Description Description 43T00468 FRONT CABINET 43T46347 BODY-PMV 43T00459 LEFT CABINET (Made in Thailand) 43T63332 COIL-PMV 43T42327 BASE PLATE ASSEMBLY 43T46351 REACTOR (Made in Thailand) (Made in Thailand) 43T20319 PROPELLER FAN (Made in Thailand) 43T00452 UPPER CABINET (Made in Thailand) 43T21375...
  • Page 104 FILE NO. SVM-10029 13-4. P.C. Board Layout Location Part Location Part Description Description 43T62320 HEATSINK (Made in Thailand) 43T60377 TEMPERATURE SENSOR 43T69780 PC BOARD 43T50304 SENSOR;HEAT EXCHANGER 43T60392 TERMINAL-5P (Made in Thailand) 43T60326 FUSE 43T62313 BASE-PLATE-PC (Made in Thailand) – –...
  • Page 105 FILE NO. SVM-03005 TOSHIBA CARRIER (THAILAND) CO.,LTD. 144/9 MOO 5, BANGKADI INDUSTRIAL PARK, TIVANON ROAD, TAMBOL BANGKADI, AMPHUR MUANG, PATHUMTHANI 12000, THAILAND. – 56 –...

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