Toshiba RAS-16SKV2-E1 Service Manual
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Toshiba RAS-16SKV2-E1 Service Manual

Toshiba split type air conditioner service manual
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FILE NO. SVM-11029

SERVICE MANUAL

SPLIT TYPE
Indoor Unit
Outdoor Unit
<High Wall, Heat Pump Type>
<Heat Pump Type>
RAS-16SKV2-E1
RAS-16SAV2-E1
R410A
July, 2011

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Summary of Contents for Toshiba RAS-16SKV2-E1

  • Page 1: Service Manual

    FILE NO. SVM-11029 SERVICE MANUAL SPLIT TYPE Indoor Unit Outdoor Unit <High Wall, Heat Pump Type> <Heat Pump Type> RAS-16SKV2-E1 RAS-16SAV2-E1 R410A July, 2011...

  • Page 2: Table Of Contents

    FILE NO. SVM-11029 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-11029 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-11029 • 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

    FILE NO. SVM-11029 2. SPECIFICATIONS 2-1. Specification Unit model Indoor RAS-16SKV2-E1 Outdoor RAS-16SAV2-E1 Cooling capacity (kW) Cooling capacity range (kW) 0.8-5.0 Heating capacity (kW) Heating capacity range (kW) 0.9-6.9 1Ph/50Hz/220-240V Power supply Electric Indoor Operation mode Cooling Heating characteristic Running current 0.21-0.19...

  • Page 6: Operation Characteristic Curve

    FILE NO. SVM-11029 2-3. 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 : 5m Pipe Length : 5m Voltage : 230V Voltage : 230V...

  • Page 7: Refrigerant R410A

    FILE NO. SVM-11029 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-11029 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-11029 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-11029 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: Specifications

    FILE NO. SVM-11029 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-11029 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-11029 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-11029 3-5-3. Brazing 2. Characteristics required for flux • 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-11029 4. CONSTRUCTION VIEWS 4-1. Indoor Unit Air inlet Air filter Front panel Heat exchanger Knock out system Knock out system Installation plate hanger Wireless remote controller Installation plate hanger Drain hose (0.50m) Connecting pipe (0.35m) Connecting pipe (0.40m) Flare 12.7mm) (Flare...

  • Page 16: Outdoor Unit

    FILE NO. SVM-11029 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-11029 5. WIRING DIAGRAM (From main line) – 17 –...

  • Page 18: Specifications Of Electrical Parts

    FILE NO. SVM-11029 6. SPECIFICATIONS OF ELECTRICAL PARTS 6-1. Indoor Unit Parts name Type Specifications Fan motor (for indoor) MF-340-30-3 DC 340V, 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-11029 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 Charge : 20g/m Outer dia.

  • Page 20: Operation Data

    FILE NO. SVM-11029 7-2. Operation Data <Cooling> Tempeature Model name Standard Heat exchanger Indoor Outdoor Compressor condition(°C) pipe temp. RAS- pressure fan mode fan mode revolution Indoor Outdoor P (MPa) T1 (°C) T2 (°C) (rps) 27/19 35/- 16SKV2-E1 0.8 to 1.0 11 to 13 40 to 42 High...

  • Page 21: Control Block Diagram

    FILE NO. SVM-11029 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-11029 8-2. Outdoor Unit (Inverter Assembly) – 22 –...

  • Page 23: Operation Description

    FILE NO. SVM-11029 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-11029 9-2. Operation Description 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-11029 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-11029 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-11029 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-11029 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-11029 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-11029 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-11029 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-11029 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-11029 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

    FILE NO. SVM-11029 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-11029 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: Pulse Modulating Valve (P .M.v.) Control

    FILE NO. SVM-11029 Item Operation flow and applicable data, etc. Description 12. 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 37: Self-Cleaning Function

    FILE NO. SVM-11029 Item Operation flow and applicable data, etc. Description 13. 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 38: Remote-A Or B Selection

    FILE NO. SVM-11029 Item Operation flow and applicable data, etc. Description • Self-Cleaning diagram 13. 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 39: Quiet Mode

    FILE NO. SVM-11029 Item Operation flow and applicable data, etc. Description 15. 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 40: Hi-Power Mode

    FILE NO. SVM-11029 Item Operation flow and applicable data, etc. Description 18. Hi-POWER ([Hi-POWER] button on the remote controller Mode is pressed) When [Hi-POWER] button is pressed while the indoor unit is in Auto, Cooling or Heating operation, Hi- POWER mark is indicated on the display of the remote controller and the unit operates as follows.

  • Page 41: Auto Restart Function

    FILE NO. SVM-11029 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 42: How To Cancel The Auto Restart Function

    FILE NO. SVM-11029 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 43: 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 44 FILE NO. SVM-11029 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. Hi-POWER OPERATION To automatically control room temperature and airflow for faster cooling or heating operation (except in DRY and FAN ONLY mode) Press HI-POWER : Start and stop the operation.
  • Page 45 FILE NO. SVM-11029 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 PRESET for 3 seconds to memorize the setting. The mark displays.

  • Page 46: Name And Functions Of Indications On Remote Controller

    FILE NO. SVM-11029 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 47: Installation Procedure

    FILE NO. SVM-11029 10. INSTALLATION PROCEDURE 10-1. Installation Diagram of Indoor and Outdoor Units Hook Installation plate For the rear left and left piping Wall Insert the cushion between the indoor unit and wall, and tilt the indoor unit for better operation.
  • Page 48 FILE NO. SVM-11029 10-2. Installation 10-1-2. 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, 6 mm thick) Putty, PVC tapes each <Fixing bolt arrangement of outdoor unit> 108 mm 125 mm Air inlet...
  • Page 49 Remote control holder x 1 Flat head wood screw ∅3.1 x 16 s x 2 Wireless remote control x 1 Toshiba new IAQ filter x 1 Toshiba new IAQ filter x 1 Drain nipple* x 1 Battery x 2 Others Name Owner’s manual...
  • Page 50 FILE NO. SVM-11029 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 51: Indoor Unit

    FILE NO. SVM-11029 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 52 FILE NO. SVM-11029 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 53 FILE NO. SVM-11029 10-3-5. Piping and Drain Hose Installation CAUTION 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 54 FILE NO. SVM-11029 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 55 FILE NO. SVM-11029 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 56 FILE NO. SVM-11029 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 57 FILE NO. SVM-11029 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-11029 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 59 14 to 18 N•m (1.4 to 1.8 kgf•m) Service port 14 to 18 N•m (1.4 to 1.8 kgf•m) Fig. 10-4-12 Hexagonal wrench is required. Model RAS-16SKV2-E1 Power source 220 – 240 V ~50 Hz Maximum running 11.0 A current Fig. 10-4-10...

  • Page 60: Test Operation

    FILE NO. SVM-11029 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 61: How To Diagnose The Trouble

    FILE NO. SVM-11029 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 62 FILE NO. SVM-11029 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 63: First Confirmation

    FILE NO. SVM-11029 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 64: Primary Judgment

    FILE NO. SVM-11029 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 65 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 66 FILE NO. SVM-11029 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 67 FILE NO. SVM-11029 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 68 FILE NO. SVM-11029 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 69 FILE NO. SVM-11029 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 70 FILE NO. SVM-11029 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 71: Judgment Of Trouble By Every Symptom

    FILE NO. SVM-11029 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? Operation 3.
  • Page 72 FILE NO. SVM-11029 (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 73 FILE NO. SVM-11029 (4) Indoor fan motor automatically starts to rotate by turning on power supply (For DC fan motor) <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.
  • Page 74 FILE NO. SVM-11029 (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 75 FILE NO. SVM-11029 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 76: How To Check Simple The Main Parts

    FILE NO. SVM-11029 11-6. How to Check Simple the Main Parts <Check procedure> Gas leakage, Discharge temp. error, disconnection of TS/TC gas leakage sensors (Check code 02, 1C) (Check code 03, 1E) Valve drive check Is coil of the pulse motor valve Set it correctly.

  • Page 77: How To Diagnose Trouble In Outdoor Unit

    FILE NO. SVM-11029 11-7. How to Diagnose Trouble in Outdoor Unit 11-7-1. Summarized Inner Diagnosis of Inverter Assembly Table 11-7-1 Diagnosis/Process flowchart Item Contents Summary Preparation Turn “OFF” the power supply breaker, and remove 3P Remove connector connector which connects of compressor.

  • Page 78: How To Check Simply The Main Parts

    FILE NO. SVM-11029 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-11029 (3) Check procedures Table 11-8-1 Procedure Check points Causes Turn off the power supply breaker Check whether or not the fuse (F01) Impulse voltage was applied or the and remove the P.C. board is blown. indoor fan motor short-circuited. assembly from electronic parts base.
  • Page 80 FILE NO. SVM-11029 11-8-2. P.C. Board Layout +12V [1] Sensor characteristic table TD : Discharge temp. sensor TO : Outdoor temp. sensor TE : Outdoor heat exchanger temp. sensor TS : Suction temp. sensor TA, TC, TO, TE, TS Temperature (˚C) –...
  • Page 81 FILE NO. SVM-11029 11-8-3. Indoor Unit (Other Parts) Part name Checking procedure Room temp. (TA) sensor Disconnect the connector and measure the resistance value with tester. Heat exchanger (TC) sensor (Normal temp.) Temperature 10°C 20°C 25°C 30°C 40°C Sensor TA, TC (kΩ) 20.7 12.6 10.0...
  • Page 82 FILE NO. SVM-11029 11-8-5. Checking Method for Each Part Part name Checking procedure Electrolytic capacitor 1. Turn OFF the power supply breaker. (For raising pressure, smoothing) 2. Discharge all three capacitors completely. 3. Check that safety valve at the bottom of capacitor is not broken. 4.

  • Page 83: How To Simply Judge Whether Outdoor Fan Motor Is Good Or Bad

    FILE NO. SVM-11029 11-9. How to Simply Judge Whether Outdoor Fan Motor is Good or Bad 1. Symptom • Outdoor fan motor does not rotate. • Outdoor fan motor stops within several tens seconds though it started rotating. • Outdoor fan motor rotates or does not rotate according to the position where the fan stopped, etc. Remote controller check code “02 : Outdoor block, 1A : Outdoor fan drive system error”...
  • Page 84 FILE NO. SVM-11029 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-11029 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-11029 Part name Procedures Remarks ‚ ‚ Electric parts 1) Follow the procedure up to 3) in above. box assembly 2) Remove screw of earth lead attached to the end plate of the evaporator. 3) Remove the lead wire cover, and remove connector for the fan motor and connec- tor for the louver motor from the electric parts box assembly.
  • Page 87 FILE NO. SVM-11029 Part name Procedures Remarks ƒ Horizontal louver 1) Remove shaft of the horizontal louver from the back body. (First remove the left shaft, and then remove other shafts while sliding the horizontal louver leftward.) „ ƒ Evaporator 1) Follow to the procedure in the item (Heat exchanger) 2) Remove the pipe holder from the rear side of the main unit.
  • Page 88 FILE NO. SVM-11029 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 89 FILE NO. SVM-11029 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 90 FILE NO. SVM-11029 Part name Procedures Remarks ‡ Cross flow fan <Caution at reassembling> 5 mm 1) To incorporate the fan motor, remove the fan motor rubber (at shaft core side), incorporate the motor into the position in the following figure, and then install the fan motor.

  • Page 91: How To Replace The Main Parts

    FILE NO. SVM-11029 12-2. Microcomputer Part name Procedure Remarks  Common procedure 1) Turn the power supply off to stop the Replace terminal block, operation of air-conditioner. microcomputer ass’y and the P .C. board ass’y. 2) Remove the front panel. •...
  • Page 92 FILE NO. SVM-11029 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-11029 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-11029 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 upper part of the front cabinet. P.C board • If removing the inverter cover in this (Soldered surface) condition, P .C.
  • Page 95 FILE NO. SVM-11029 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-11029 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-11029 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-11029 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-11029 Part name Procedure Remarks TE sensor (outdoor heat exchanging temperature sensor) • Attachment Arrow D Install the sensor onto the straight pipe part of the condenser output pipe. Detail B Detail C Detail A Detail C TS sensor (Suction pipe temperature sensor) •...
  • Page 100 FILE NO. SVM-11029 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-11029 13. EXPLODED VIEWS AND PARTS LIST 13-1. Indoor Unit (Part-E) Location Part Location Part Description Description 43T69319 TEMPERATURE SENSOR 43T69633 PC BOARD ASSY,WRS-LED 43T60365 TERMINAL BLOCK; 3P 43T69946 PC BOARD 43T69320 TEMPERATURE SENSOR 43T50306 TEMPERATURE SENSOR 43T62003 CORD CLAMP –...
  • Page 102 FILE NO. SVM-11029 13-2. Indoor Unit Location Part Location Part Description Description 43T21420 STEPPING-MOTOR 43T39328 MOTOR BAND (LEFT) 43T21428 FAN-MOTOR 43T39329 MOTOR BAND (RIGHT) 43T22312 BEARING ASSY, MOLD 43T09409 HORIZONTAL LOUVER 43T70313 HOSE, DRAIN 43T79313 CAP, DRAIN 43T20325 CROSS FLOW FAN ASSEMBLY 43T44473 REFRIGERANT CYCLE ASSEMBLY 43T49010...
  • Page 103 FILE NO. SVM-11029 13-3. Outdoor Unit Location Part Location Part Description Description 43T00468 FRONT CABINET 43T58311 REACTOR 43T00459 LEFT CABINET 43T20319 PROPELLER FAN 43T42327 BASE PLATE ASSEMBLY 43T21375 FAN MOTOR 43T00452 UPPER CABINET 43T47001 NUT FLANGE 43T19329 FAN GUARD 43T97001 43T00562 PACKED VALVE COVER ASSEMBLY 43T49335...
  • Page 104 FILE NO. SVM-11029 13-4. Outdoor Unit (Part-E) TE Sensor (Ø6) TS Sensor (Ø6) TO Sensor (Ø6) TD Sensor (Ø4) Location Part Location Part Description Description 43T62320 HEATSINK 43T60377 TEMPERATURE SENSOR 43T69941 PC BOARD 43T50304 SENSOR;HEAT EXCHANGER 43T60392 TERMINAL-5P 43T62313 BASE-PLATE-PC 43T60326 FUSE –...
  • 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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