Toshiba RAS-M07SKV-E Service Manual
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Toshiba RAS-M07SKV-E Service Manual

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SERVICE MANUAL
Indoor Unit
<High Wall, Heat Pump Type>
RAS-M07SKV-E
RAS-M10SKV-E
RAS-M13SKV-E
RAS-M16SKV-E
<High Wall, Cooling Type>
RAS-M10SKCV-E
RAS-M13SKCV-E
RAS-M16SKCV-E
R410A
FILE NO. SVM-07034-2
SPLIT TYPE
Revised May, 2009

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Summary of Contents for Toshiba RAS-M07SKV-E

  • Page 1 FILE NO. SVM-07034-2 SERVICE MANUAL SPLIT TYPE Indoor Unit <High Wall, Heat Pump Type> RAS-M07SKV-E RAS-M10SKV-E RAS-M13SKV-E RAS-M16SKV-E <High Wall, Cooling Type> RAS-M10SKCV-E RAS-M13SKCV-E RAS-M16SKCV-E R410A Revised May, 2009...

  • Page 2: Table Of Contents

    CONTENTS 1. SAFETY PRECAUTIONS ................3 2. SPECIFICATIONS ..................5 3. REFRIGERANT R410A ................8 4. CONSTRUCTION VIEWS ................ 16 5. WIRING DIAGRAM .................. 17 6. SPECIFICATIONS OF ELECTRICAL PARTS ......... 19 7. REFRIGERANT CYCLE DIAGRAM ............20 8. CONTROL BLOCK DIAGRAM ..............21 9.

  • Page 3: Safety Precautions

    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 • 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

    RAS-4M27GACV-E outdoor unit : Combination available X : Combination unavailable This service manual describes about M**SKV-E series indoor units, RAS-M07SKV-E,RAS-M10SKV-E, RAS-M13SKV-E,RAS-M16SKV-E,RAS-M10SKCV-E,RAS-M13SKCV-E and RAS-M16SKCV-E only. For the multi outdoor unit to be combined, refer to the service manual. Outdoor unit File name...
  • Page 6 Revised-2 Specifications Unit model Indoor RAS-M07SKV-E, RAS-M10SKV-E, RAS-M13SKV-E, RAS-M16SKV-E ∗1 Outdoor ∗1 Cooling capacity (kW) ∗1 Cooling capacity range (kW) ∗1 Heating capacity (kW) ∗1 Heating capacity range (kW) 220~240V-1Ph-50Hz / 220V-1Ph-60Hz Power supply Electric Indoor Unit model RAS-M07SKV-E RAS-M10SKV-E RAS-M13SKV-E RAS-M16SKV-E 0.21-0.19...
  • Page 7 Revised-2 Unit model Indoor RAS-M10SKCV-E, RAS-M13SKCV-E, RAS-M16SKCV-E ∗1 Outdoor ∗1 Cooling capacity (kW) ∗1 Cooling capacity range (kW) − Heating capacity (kW) Heating capacity range (kW) − Power supply 220~240V-1Ph-50Hz / 220V-1Ph-60Hz RAS-M10SKCV-E RAS-M13SKCV-E RAS-M16SKCV-E Electric Indoor Unit model 0.21-0.19 0.21-0.19 0.21-0.19 characteristic...

  • Page 8: Refrigerant R410A

    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 is 1.6 times higher than conventional refrigerant...
  • Page 9 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 10 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 11 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. 3-2-2 Relations between flare nut and flare seal surface 2.
  • Page 12 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 13 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 14 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 15 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. • Due to a wide effective temperature range, flux is hard to carbonize.

  • Page 16: Construction Views

    Revised-2 4. CONSTRUCTION VIEWS RAS-M07SKV-E, RAS-M10SKV-E, RAS-M13SKV-E, RAS-M16SKV-E RAS-M10SKCV-E, RAS-M13SKCV-E, RAS-M16SKCV-E Air filter Air inlet 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)

  • Page 17: Wiring Diagram

    Revised-2 5. WIRING DIAGRAM 5-1. RAS-M07SKV-E, RAS-M10SKV-E, RAS-M13SKV-E, RAS-M10SKCV-E, RAS-M13SKCV-E – 17 –...
  • Page 18 Revised-2 5-2. RAS-M16SKV-E RAS-M16SKCV-E – 18 –...

  • Page 19: Specifications Of Electrical Parts

    Revised-2 6. SPECIFICATIONS OF ELECTRICAL PARTS Indoor Unit Parts name Type Specifications M07SKV-E, M10SKV-E, Fan motor AFS-220-20-4AR AC240V, 20W M13SKV-E, M10SKCV-E, M13SKCV-E (for indoor) ICF-340-30-2B DC 340V, 30W M16SKV-E, M16SKCV-E ( − ) Room temp. sensor (TA-sensor) at 25°C Ω Heat exchanger temp.

  • Page 20: Refrigerant Cycle Diagram

    Revised-2 7. REFRIGERANT CYCLE DIAGRAM Temp. measurement INDOOR UNIT Indoor heat exchanger Cross flow fan : ∗1 Max. : ∗1 Min. Pressure measurement Chargeless : ∗1 Deoxidized copper pipe Charge : ∗1 Gauge attaching port Outer dia. : 6.35mm Vacuum pump connecting port Thickness : 0.8mm Sectional shape Deoxidized copper pipe...

  • Page 21: Control Block Diagram

    Revised-2 8. CONTROL BLOCK DIAGRAM 8-1. Indoor Unit RAS-M07SKV-E, RAS-M10SKV-E, RAS-M13SKV-E, RAS-M16SKV-E Indoor Unit Control Unit M.C.U. Heat Exchanger Sensor (Tcj) Louver Functions Motor Heat Exchanger Sensor (Tc) Heat Exchanger Sensor (Tc) • Cold draft preventing Function Room Temperature Sensor (Ta) Louver Motor •...
  • Page 22 RAS-M10SKCV-E, RAS-M13SKCV-E, RAS-M16SKCV-E Indoor Unit Control Unit M.C.U. Heat Exchanger Sensor (Tcj) 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 23: Operation Description

    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 9-2. Operation Description 1. Basic operation ......................25 1. Operation control ....................25 2. Operating mode selection when performing 2-room operation ......26 3. Cooling/Heating operation ..................26 4. AUTO operation ....................27 5. DRY operation ....................... 27 2. Indoor fan motor control ..................... 28 Capacity control ......................

  • Page 25: Basic Operation

    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: Operating Mode Selection When Performing 2-Room Operation

    Item Operation flow and applicable data, etc. Description 1. Basic 2. Operating mode selection when performing 2-room operation operation 1) The outdoor unit operation mode conforms to the instructions of the indoor unit that was pressed first. 2) When combined operation consisting of cooling (dry) and heating, fan and heating, or cleaning operation and heating is performed, operation conforms to the instructions of the indoor unit that was pressed first as shown in the following table.

  • Page 27: Auto Operation

    Item Operation flow and applicable data, etc. Description 1. Basic 4. AUTO operation 1) Detects the room temperature (Ta) when operation the operation started. Selection of operation mode As shown in the following figure, the operation starts by 2) Selects an operation mode from Ta in selecting automatically the status of room temperature the left figure.

  • Page 28: Indoor Fan Motor Control

    *5 : Fan speed = (M + –L) x 1/4 + L +1.0 +0.5 (Linear approximation L(W6) from M+ and L) (Table 1) Indoor fan air flow rate Fan speed RAS-M10SKV-E RAS-M13SKV-E RAS-M16SKV-E RAS-M07SKV-E RAS-M10SKCV-E RAS-M13SKCV-E RAS-M16SKCV-E level COOL HEAT Fan speed Air flow rate Fan speed Air flow rate...
  • Page 29 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 30: Capacity Control

    Item Operation flow and applicable data, etc. Description 3. Capacity The cooling or heating capacity depending on the load is 1) The difference between set control adjusted. temperature on remote controller (Ts) and room temperature (Ta) According to difference between the setup value of tempera- is calculated.

  • Page 31: Release Protective Control By Temperature Of Indoor Heat Exchanger

    Item Operation flow and applicable data, etc. Description 4. 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 reduced.

  • Page 32: Louver Control

    Item Operation flow and applicable data, etc. Description 5. Louver control This function controls the air direction of the indoor unit. • The position is automatically controlled according to the operation 1) Louver mode (COOL/HEAT). position • 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 33: Eco Operation

    Revised-2 Item Operation flow and applicable data, etc. Description When pressing [ECO] button on the remote controller, a 6. ECO <Cooling operation> Economic operation is performed. operation 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 34: Temporary Operation

    Item Operation flow and applicable data, etc. Description 7. 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 35: Self-Cleaning Function

    Item Operation flow and applicable data, etc. Description 8. Self-Cleaning 1. Purpose The Self-Cleaning operation is to minimize the function 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 36: Selt-Cleaning Function Release

    Item Operation flow and applicable data, etc. Description • Self-Cleaning diagram 8. Self-Cleaning function Operation display FCU fan rpm is depend on presetting. (500RPM) FCU louver OPEN CLOSE OPEN (12.7º) ON or OFF ON or OFF Timer display depend on presetting of timer function. depend on presetting of timer function.

  • Page 37: Remote-A Or B Selection

    Item Operation flow and applicable data, etc. Description 10. Remote-A or B Setting the remote controller 1. Purpose selection This operation is to operate only one To separate using of remote control for each indoor unit in case of 2 air conditioner are installed nearly. indoor unit using one remote controller.

  • Page 38: Quiet Mode

    Item Operation flow and applicable data, etc. Description Quiet mode is the system which, control the 11. QUIET mode When the [QUIET] button is pressed, the fan of the revolving speed of indoor fan to work indoor unit will be restricted the revolving speed at −...

  • Page 39: One-Touch Comfort

    Item Operation flow and applicable data, etc. Description One touch comfort is the fully automated operation 14. One-Touch Operation condition for model to Europe that is set according to the preferable condition in Comfort market a region. When an indoor unit receives "One Touch Comfort Signal"...

  • Page 40: Auto Restart Function

    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. This function is not set to work when shipped from the factory.

  • Page 41: How To Cancel The Auto Restart Function

    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 42: Remote Controller And Its Fuctions

    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 43 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 44 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 45: Name And Functions Of Indications On Remote Controller

    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 46 9-5. Intermittent Operation Control for Indoor Fans of the Indoor Unit at Thermo-off Side in Heating Operation While heating operation is executed in two rooms, if room temperature reached the setup temperature in one room and thermo-off occurred, the following operations start. (Refer to the figure belox.) 1.

  • Page 47: Installation Procedure

    Revised-2 10. INSTALLATION PROCEDURE 10-1. Installation Diagram of Indoor and Outdoor Units For the rear left and left piping Hook Installation plate Wall Insert the cushion between the indoor unit and wall, and tilt the indoor unit for better operation. Do not allow the drain hose to get slack.
  • Page 48 Parts name Q’ty Refrigerant piping Indoor unit name Liquid side (Outer diameter) Gas side (Outer diameter) 1 ea. RAS-M07SKV-E, M10SKV-E, M10SKCV-E 6.35 mm 9.52 mm RAS-M13SKV-E, M13SKCV-E RAS-M16SKV-E, M16SKCV-E 6.35 mm 12.7 mm Shield pipe (for extension drain hose) (polyethylene foam, 6 mm thick) 10-2-2.
  • Page 49 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 50 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 51 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. Prepare a power source for the exclusive use of screws with the upper and lower catches, that the air conditioner.
  • Page 52 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 53 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 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 55: How To Diagnose The Trouble

    11. HOW TO DIAGNOSE THE TROUBLE 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 56 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 57 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 58 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. However, the check codes are not deleted even if the power supply is turned off because they are stored in the fixed memory.
  • Page 59 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. operations stop immediately.
  • Page 60 Revised-2 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 61 ( RAS-M16 Series ) Operation 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 Does transmission mark power supply by pushing on remote controller flash Remote controller is defective.
  • Page 62 Revised-2 (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.) ( RAS-M07, 10,13 Series ) Turn off power...
  • Page 63 ( RAS-M16 Series ) Turn off power supply once, and turn it on again. Is it possible to detect DC 1V or more between Does fan motor + and – of continue to operate? Peplace indoor motor connector (CN31). fan motor. Start to operate indoor unit in cooling operation at airflow...
  • Page 64 (4) Indoor fan motor automatically starts to rotate by turning on power supply (For DC fan motor in RAS-M16SKV-E, RAS-M16SKCV-E) <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 65 Revised-2 (For AC fan motor in RAS-M07, 10,13SKV-E, RAS-M10,13SKCV-E) <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 66 (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 START/STOP button. Operation lamp on indoor unit is not indicated.
  • Page 67 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 68 11-9. How to Check Simply the Main Parts 11-9-1. How to Check the P.C. Board (Indoor Unit) (1) Operating precautions 1) When removing the front panel or the P .C. board, be sure to shut off the power supply breaker. 2) When removing the P .C.
  • Page 69 Revised-2 (3) Check procedures ( RAS-M07, 10,13 Series ) 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.
  • Page 70 ( RAS-M16 Series ) 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 71 Revised-2 11-9-2. P .C . Board Layout ( RAS-M07, 10, 13 Series ) +12V [1] Sensor characteristic table TA, TC, TCJ TA : Room temp. sensor TC : Heat exchanger temp. sensor TCJ : Heat exchanger temp. sensor Temperature (˚C) –...
  • Page 72 ( RAS-M16 Series ) +12V [1] Sensor characteristic table TA, TC, TCJ TA : Room temp. sensor TC : Heat exchanger temp. sensor TCJ : Heat exchanger temp. sensor Temperature (˚C) – 92 –...
  • Page 73 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, TCJ) (Normal temp.) sensor Temperature 10°C 20°C 25°C 30°C 40°C Sensor TCJ, TA, TC (kΩ) 20.7 12.6 10.0...

  • Page 74: How To Replace The Main Parts

    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. • After the repairs have been completed (after the front panel and cabinet have been installed), perform a test run, and check for smoking, unusual sounds and other abnormalities.
  • Page 75 Part name Procedures Remarks 5) Remove the front panel fixing screws.  Front panel (2 pcs.) 6) Take off three hooks of panel from rear side. 2 Screws Three hooks <How to assemble the front panel> 1) Press three center positions and two lower center positions of the air outlet, and then hang the hanging hooks (3 pcs.) at the top side of the front panel to the rear plate.
  • Page 76 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 77 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 78 Part name Procedures Remarks 1) Follow to the procedure in the item m. Bearing 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 79 Part name Procedures Remarks 1) Follow to the procedure till item m. Fan motor 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 80 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 81 Revised-2 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. • Remove the 2 fixing screws. 3) Remove the electrical part base.
  • Page 82 ( RAS-M16 Series ) L01 C01 CN23 FUSE CN10 DB01 IC01 IC03 – 82 –...

  • Page 83: Exploded Views And Parts List

    Revised-2 13. EXPLODED VIEWS AND PARTS LIST 13-1. Indoor Unit (1) Location Part Location Part Description Description 43T21397 LOUVER MOTOR 43T39327 BEARING BASE 43T21371 FAN MOTOR 43T39328 MOTOR BAND (LEFT) (FOR RAS-M16SKV-E,SKCV-E) 43T39329 MOTOR BAND (RIGHT) 43T21393 FAN MOTOR 43T09409 HORIZONTAL LOUVER (FOR RAS-M07,10,13SKV-E,SKCV-E) 43T79313...
  • Page 84 PC BOARD (FOR RAS-M10SKV-E) 43T60002 TERMINAL BLOCK; 3P 43T69673 PC BOARD (FOR RAS-M13SKV-E) 43T69320 TEMPERATURE SENSOR 43T69674 PC-BOARD (FOR RAS-M10SKCV-E) 43T62003 CORD CLAMP 43T69675 PC-BOARD (FOR RAS-M13SKCV-E) 43T69633 PC BOARD ASSY,WRS-LED 43T69826 PC-BOARD (FOR RAS-M07SKV-E) 43T69670 PC BOARD (FOR RAS-M16SKV-E) – 84 –...
  • Page 85 (THAILAND) CO.,LTD. 144/9 MOO 5, BANGKADI INDUSTRIAL PARK, TIVANON ROAD, TAMBOL BANGKADI, AMPHUR MUANG, PATHUMTHANI 12000, THAILAND.

This manual is also suitable for:

Ras-m10skv-eRas-m13skv-eRas-m16skv-eRas-m10skcv-eRas-m13skcv-eRas-m16skcv-e

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