Toshiba RAS-M10NKV-E Service Manual
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Toshiba RAS-M10NKV-E Service Manual

Split type air conditioner
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FILE NO.SVM-05019

SERVICE MANUAL

AIR-CONDITIONER
SPLIT TYPE
RAS-M10NKV-E, RAS-M13NKV-E, RAS-M16NKV-E
RAS-M10NKCV-E, RAS-M13NKCV-E, RAS-M16NKCV-E
(This service manual provide information only on the indoor units.
For information on the outdoor unit please refer to the service manual
of the outdoor unit.)
R410A
May, 2005

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Summary of Contents for Toshiba RAS-M10NKV-E

  • Page 1: Service Manual

    FILE NO.SVM-05019 SERVICE MANUAL AIR-CONDITIONER SPLIT TYPE RAS-M10NKV-E, RAS-M13NKV-E, RAS-M16NKV-E RAS-M10NKCV-E, RAS-M13NKCV-E, RAS-M16NKCV-E (This service manual provide information only on the indoor units. For information on the outdoor unit please refer to the service manual of the outdoor unit.) R410A...
  • Page 2 FILE NO. SVM-05019 CONTENTS 1. Specifications 2. Construction Views 3. Wiring Diagram 4. Specifications of Electrical Parts (Indoor unit only) 5. Control Block Diagram (Indoor unit only) 6. Operation Description 7. Installation Procedure 8. How to Diagnose the trouble 9. How to Replace the main parts (Indoor unit only) 10.

  • Page 3: Specifications

    FILE NO. SVM-05019 1. SPECIFICATIONS Specifications RAS-M10NKV-E, RAS-M13NKV-E, RAS-M16NKV-E 220/230/240V, 1Ph, 50/60Hz Power supply Electric Unit model RAS-M10NKV-E RAS-M13NKV-E RAS-M16NKV-E characteristice Running current 0.15 0.15 0.15 Power consumption Power factor 36/39 39/40 42/42 Operating High dB (A) 33/35 35/35 39/39...

  • Page 4: Construction Views

    FILE NO. SVM-05019 2. CONSTRUCTION VIEWS Indoor Unit Front panel Air filter Air inlet Heat exchanger Air outlet Knock out system Knock out system Hanger Connecting pipe (0.43m) Drain hose (0.54m) (Flare ∅6.35) Hanger Connecting pipe (0.33m) (For 10,13 series ; Flare ∅9.52 For 16 series ;...

  • Page 5: Wiring Diagram

    FILE NO. SVM-05019 3. WIRING DIAGRAM 3-1. Indoor Unit (For 10k & 13k) COLOR INDICATION BROWN INDOOR OUTDOOR TERMINAL ２ ３ WHITE UNIT UNIT BLOCK YELLOW BLUE BLACK GRAY PINK W HI ORANGE GRN&YEL GREEN & YELLOW GREEN CN24 CN23 CN21 CN01 LINE...
  • Page 6 FILE NO. SVM-05019 3-2. Indoor Unit (For 16k) COLOR INDICATION INDOOR OUTDOOR TERMINAL BROWN UNIT UNIT BLOCK WHITE YELLOW BLUE BLACK GRAY PINK ORANGE GRN&YEL GREEN & YELLOW GREEN CN24 CN23 CN21 CN01 FAN MOTOR CN10 (BLU) (WHI) HEAT EXCHANGER SENSOR DC MOTOR CN03...

  • Page 7: Specifications Of Electrical Parts

    FILE NO. SVM-05019 4. SPECIFICATIONS OF ELECTRICAL PARTS RAS-M10NKV-E, RAS-M13NKV-E RAS-M10NKCV-E, RAS-M13NKCV-E Parts name Type Specifications Fan motor (for indoor) SKF-220-20-4A-1 AC Motor with 150°C thermo fuse Thermo. sensor (TA-sensor) ——— 10 kΩ at 25°C 187 − 276V, 6VA AC-AC transformer (T01) TT-10 µPD780024AGK...

  • Page 8: Control Block Diagram

    Louver ON/OFF Signal Remote ON/OFF Signal Control Louver Driver Louver Motor Noise Filter From Outdoor Unit Outdoor Unit REMOTE CONTROLLER RAS-M10NKV-E, RAS-M13NKV-E, RAS-M16NKV-E RAS-M10NKCV-E, RAS-M13NKCV-E, RAS-M16NKCV-E (Heat pump model) (Cooling only model) Infrared Infrared Rays Rays Remote Controller Remote Controller...

  • Page 9: Operation Description

    FILE NO. SVM-05019 6. OPERATION DESCRIPTION (2) Role of outdoor unit controller 6-1. Outline of Air Conditioner Control Receiving the operation command signal (Serial This air conditioner is a capacity-variable type air signal) from the indoor controller, the outdoor conditioner. The capacity proportional control unit performs its role.
  • Page 10 FILE NO. SVM-05019 (4) Contents of operation command signal (Serial 6-1-1. Capacity Control signal) from outdoor unit controller to indoor unit The cooling capacity is varied by changing compres- controller sor motor speed. The inverter changes compressor The following signals are sent from the outdoor motor speed by changing AC 220–240V power to unit controller.
  • Page 11 FILE NO. SVM-05019 6-1-4. Prevent-Freezing Control 6-1-6. Louver Control The indoor heat exchanger sensor detects refriger- (1) Vertical air flow louvers ant vapor temperature in COOL/DRY operation. If Positions of vertical air flow louvers are automati- the temperature is below the specified value, com- cally controlled according to the operation status pressor motor speed is reduced so that operation is (AUTO, COOL, DRY, HEAT).
  • Page 12 FILE NO. SVM-05019 6-1-7. Outdoor Fan Control (DC Fan Motor) Although the outdoor fan motor drives the outdoor fan by non-step variable system of the revolution speed, the revolution speed is restricted to three steps on the convenience of controlling. If a strong wind is lashing outside of the room, the operation may be continued as the outdoor fan stops in order to protect the outdoor fan motor.
  • Page 13 FILE NO. SVM-05019 6-2-2. Cooling Operation (1) Cooling capacity control (The Remote controller [MODE] Button • The cooling capacity and room temperature is Set to the COOL Position) are controlled by changing the compressor motor speed according to both the difference •...
  • Page 14 FILE NO. SVM-05019 (5) Limit for maximum compressor motor speed (7) Discharge temperature control by indoor fan speed The discharge temperature of refrigerant gas When outdoor temperature sensor detected from the compressor is detected by the dis- 32°C or lower, and indoor heat exchanger charge temperature sensor, and controls operat- sensor detected 17°C or lower, the maximum ing compressor motor speed.
  • Page 15 FILE NO. SVM-05019 (8) ECONO operation control 1) The set temperature increased 0.5°C per hour up When the [ECO] button is pushed, ECONO to 2°C starting from the set temperature when operation is performed by restraining air flow ECONO has been received. 2) Indoor air flow is controlled between L + and UL.
  • Page 16 FILE NO. SVM-05019 • The outdoor unit controls the outdoor fan relay 2) Changing of air flow (Fan setting : AUTO) R01, R02 and R03, and the compressor motor When the Hi POWER is started, the fan of the speed according to the operation command signal indoor unit operates at higher air flow level than sent from the indoor unit.
  • Page 17 FILE NO. SVM-05019 6-2-4. Heating Operation (3) SUL : Super ultra low Transferring of heating operation signal from indoor [In star ting and in stability] unit to outdoor unit starts. The indoor fan motor operates by the room tempera- In star ting In stability ture when selecting "AUTO"...
  • Page 18 FILE NO. SVM-05019 Defrost operation has been already performed once. 10.8A 16.0 2) Defrost operation 15.5 Operation of the compressor is stopped once, turn off power coupler for four-way 10.3A 11.0 valve after 10 seconds, and then exchange 10.5 the four-way valve. 9.8A After 20 seconds, restart operation of the compressor.
  • Page 19 FILE NO. SVM-05019 After 30 minutes passed, the different value of room temperature and set temperature is separated zone again by more different value than before. Then compressor motor speed after 30 minute passed is lower than before by the same different value of room temperature and set temperature.
  • Page 20 FILE NO. SVM-05019 6-3. Temporary Operation 6-2-5. Auto Operation (1) As shown in Fig. 6-2-13, the operation mode • Temporary Auto operation, existence of Auto Restart, and Temporary Cooling operation can be (COOL, DRY, HEAT) is selected according to the outside temperature when the operation has set by the [RESET] button of the indoor controller.

  • Page 21: Auto Restart Function

    FILE NO. SVM-05019 6-4. Auto Restart Function 6-4-1. How to set auto restart function To set the auto restart function, proceed as follows: The indoor unit is equipped with an automatic The power supply to the unit must be on; the function restarting function which allows the unit to restart will not set if the power is off.
  • Page 22 FILE NO. SVM-05019 6-4-2. How to cancel auto restart function To cancel auto restart function, proceed as follows: Repeat the setting prodedure: the unit receives the signal and beeps three times. The unit will be required to be turned on with the remote control after the main power supply is turned off.
  • Page 23 FILE NO. SVM-05019 6-6. Remote control ECO timer button [ECO] 6-6-1. Remote control and its functions Push this button to start the ECO operation. RAS-M10UKCV, RAS-M13UKCV, RAS-M16UKCV (A receiving been is heard) 1 1 1 1 Quiet button [QUIET] Infrared signal emitter Push this button to start the quiet operation.
  • Page 24 FILE NO. SVM-05019 6-6-2. Names and functions of indications on remote cont r ol Display All indications, except for clock time indication, are indicated by push the [ ] button. 1 1 1 Transmission mark This transmission mark ( ) indicates when the remote control transmits signals to the indoor unit. 2 2 2 2 Mode display Indicates the current operation mode.

  • Page 25: Installation Procedure

    And, make sure the equipment to be earthed. • Appliance shall be installed in accordance with national wiring regulations. If you detect any damage, do not install the unit. Contact your Toshiba dealer immediately. CAUTION • Exposure of unit to water or other moisture before installation will result in an electrical short.
  • Page 26 FILE NO. SVM-05019 7-1-1. Installation/Servicing Tools Changes in the product and components In the case of an air condition using R-410A, 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 27 FILE NO. SVM-05019 7-2. Installation Diagram of Indoor 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. Shield Do not allow the drain hose pipe to get slack.
  • Page 28 FILE NO. SVM-05019 7-3-2. Accessory and installation parts Part Part Part Part name (Q’ty) Part name (Q’ty) Part name (Q’ty) Installation plate x 1 Remote control holder x 1 Mounting screw ∅4 x 25 l x 6 Pan head wood screw Wireless remote control x 1 Sasa-Zeolite plus filter x 1 ∅...
  • Page 29 FILE NO. SVM-05019 Mounting the Installation Plate 7-2-2. Installation Place For installation of the indoor unit, use the paper pattern on the back. • A place which provides the spaces around the indoor unit as shown in Anchor bolt holes the above diagram.
  • Page 30 FILE NO. SVM-05019 7-2-6 Piping and Drain Hose Installation CAUTION Piping and Drain Hose Forming • This appliance can be connected to the mains in either of the following two ways. * Since dewing results in a machine trouble, make sure to insulate both (1) Connection to fixed wiring : the connecting pipes.
  • Page 31 FILE NO. SVM-05019 7-2-6 Indoor Unit Fixing In case of right or left piping • After scribing slits of the front panel 1. Pass the pipe through the hole in the wall, and hook the indoor unit on the installation plate at the upper hooks. with a knife or a making-off pin, cut 2.
  • Page 32 FILE NO. SVM-05019 7-2-8. Setting of Remote Controller Selector (1) Stop the operation of the air conditioner and turn turn off its main power supply. Switch (2) Pull the air inlet grille toward you to open it and When two indoor units are installed in the remove the air inlet grille.
  • Page 33 FILE NO. SVM-05019 2. Setting of remote controller selector at the 7-2-9. Check and Test Operation remote controller side 1. Check the unit is firmly hooked up on the installation plate. [B] of the remote controller is displayed with 2. Check the connecting pipes tightened liquid crystal only when it is set to [B].

  • Page 34: How To Diagnose The Trouble

    FILE NO. SVM-05019 8. HOW TO DIAGNOSE THE TROUBLE The pulse modulating 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.) 8-1.
  • Page 35 FILE NO. SVM-05019 8-3. Judgment by Flashing LED of Indoor Unit While the indoor unit monitors the operation status of the air conditioner, if the protective circuit operates, the contents of self-diagnosis are displayed with block on the indoor unit indication section. Table 8-3-1 Lamps Self-diagnosis...
  • Page 36 FILE NO. SVM-05019 8-4. Self-Diagnosis by Remote Control (Check Code) (1) If the lamps are indicated as shown B to G in Table 9-3-1, exchanger the self-diagnosis by the remote control. (2) When the remote control is set to the service mode, the indoor controller diagnoses the operation condition and indicate the information of the self-diagnosis on the display of the remote...
  • Page 37 FILE NO. SVM-05019 8-4-2. Caution at Servicing (1) After servicing, push the [ ] button to return to the normal mode. (2) After servicing by the check code, turn off breaker of the power supply, and turn on breaker of the power supply again so that memory in the microcomputer returns the initial status.
  • Page 38 FILE NO. SVM-05019 Block distinction Operation of diagnosis function Check Check Judgment and action Block Cause of operation conditioner Remarkes code code status Outdoor P.C. Inverter over-current All off Displayed when Even if trying operation again, all board protective circuit operates. error is detected.

  • Page 39: Judgement Of Trouble By Every Symptom

    FILE NO. SVM-05019 8-5. Judgement of Trouble by Every Symptom 8-5-1. Indoor unit (Including remote controller) (1) Power is not turned on (Does not operate entirely) For 10/13k Turn off power Operation supply once, and 5 second later, turn it Check item on again.
  • Page 40 FILE NO. SVM-05019 (2) Power is not turned on though Indoor P.C. board is replaced <Confirmation procedure> Turn on power supply. Is wired correctly to white and black Correct wiring. Does operation lamp flash? lead wires of terminal board? To item of “Power is not turned on”.
  • Page 41 FILE NO. SVM-05019 (3) Only the indoor fan does not operate. (For 10/13k) <Check procedure> Shut off the power supply once. Turn the power supply. Does the fan stop in Control P.C. board is defective. Replace the P.C. board. no operating status? Start the operation with low fan setting in cool operation.
  • Page 42 FILE NO. SVM-05019 (For 16k) <Preliminary check> 1 Is it possible to detect the power supply voltage (200 – 240V) between 1 and 2 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 Operation approximately 5 minutes after it is turned on, to prevent a cold air Check item...
  • Page 43 FILE NO. SVM-05019 (4) Indoor fan motor starts rotating by turning on power supply alone. (For 16k) <Cause> The IC is built in the indoor fan motor. Therefore the P .C. board is also mounted to the inside of the motor. If the P.C.
  • Page 44 FILE NO. SVM-05019 8-8. How to Check Simply the Main (2) Inspection procedures Parts 1) When a P.C. board is judged to be defective, check for disconnection, burning, or discol- 8-8-1. How to Check the P.C. Board oration of the copper foil pattern or this P .C. (Indoor Unit) board.
  • Page 45 FILE NO. SVM-05019 (3) Checking procedure. (For 10/13k) Table 8-6-1 Causes Procedure Check Point (Symptom) Shut off the power supply and 1. Is the fuse blown? 1. Application of shock voltage. remove the P.C. board assembly Overload by short-circuit of the from the electronic parts base.
  • Page 46 FILE NO. SVM-05019 (For 16k) Table 8-8-1 Procedure Check point (Symptom) Causes Shut off the power supply and 1. Is the fuse blown? Application of shock voltage. remove the P.C. board assembly Overload by short-circuit of the from the electronic parts base. parts.
  • Page 47 FILE NO. SVM-05019 <Sensor characteristic table> TD : Discharge temp. sensor TA : Room temp. sensor TC : Heat exchanger temp. sensor TA, TC, TO, TGa, TGb, TGc, TGd TO : Outdoor temp. sensor TGa : Gas side temp. sensor TGb : Gas side temp.
  • Page 48 FILE NO. SVM-05019 8-8-3. 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) (Normal temp.) sensor Temperature 10°C 20°C 25°C 30°C 40°C Sensor TA, TC (kΩ) 20.7 12.6 10.0...

  • Page 49: How To Replace The Main Parts

    FILE NO. SVM-05019 9. HOW TO REPLACE THE MAIN PARTS 9-1. Indoor Unit Part name Procedures Remarks Front panel How to remove the front panel 1) Stop operation of the air conditioner and turn off its main power supply. 2) Pull the air inlet grille toward you to open it and remove the air inlet grille.
  • Page 50 FILE NO. SVM-05019 Part name Procedures Remarks Heat exchanger 1) Remove the front panel, electrical part and the horizontal louver following procedure 3. 2) Remove the pipe holder at the rear side of main unit. 3) Remove the 2 screws on the heat exchanger at the base bearing.
  • Page 51 FILE NO. SVM-05019 9-2. Microcomputer Part name Procedure Remarks  Common 1) Turn the power supply off to stop the operation of Replace the thermal fuse, terminal procedure air-conditioner. block, microcomputer ass’y and the P .C. board ass’y. 2) Remove the front panel. •...

  • Page 52: Exploded Views And Parts List

    TERMINAL BLOCK; 3P 43T69474 PC BOARD (FOR RAS-M10NKCV-E) 43T69320 TEMPERATURE SENSOR 43T69475 PC BOARD (FOR RAS-M13NKCV-E) 43T62003 CORD CLAMP 43T69476 PC BOARD (FOR RAS-M10NKV-E) 43T69079 PC BOARD ASSY;WRS-LED 43T69477 PC BOARD (FOR RAS-M13NKV-E) 43T69332 PC BOARD (FOR RAS-M16NKV-E) – 51 –...

  • Page 53: Indoor Unit

    OWNER'S MANUAL (FOR RAS-M16NKV-E, NKCV-E) 43T85411 OWNER'S MANUAL 43T47006 PIPE; DELIVERY 43T85412 OWNER'S MANUAL 43T47005 PIPE; SUCTION 43T85413 OWNER'S MANUAL (FOR RAS-M10NKV-E, NKCV-E) 43T62302 TERMINAL COVER 43T47016 PIPE; SUCTION 43T60317 CORD MOTOR LOUVER (FOR RAS-M13,16NKV-E, NKCV-E) 43T07303 HOLDER PIPE 43T49009 SPRING 43T82301 PLATE;...
  • Page 54 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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