Toshiba RAS-15EKCV-UL Service Manual
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Toshiba RAS-15EKCV-UL Service Manual

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SERVICE MANUAL

Indoor Unit
<High Wall, Cooling Type>
RAS-15EKCV-UL
RAS-17EKCV-UL
RAS-22EKCV-UL
R410A
FILE NO. SVM-13074-2
SPLIT TYPE
Outdoor Unit
<Cooling Type>
RAS-15EACV-UL
RAS-17EACV-UL
RAS-22EACV-UL
Revised Feb, 2014

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Summary of Contents for Toshiba RAS-15EKCV-UL

  • Page 1: Service Manual

    FILE NO. SVM-13074-2 SERVICE MANUAL SPLIT TYPE Indoor Unit Outdoor Unit <High Wall, Cooling Type> <Cooling Type> RAS-15EKCV-UL RAS-15EACV-UL RAS-17EKCV-UL RAS-17EACV-UL RAS-22EKCV-UL RAS-22EACV-UL R410A Revised Feb, 2014...

  • Page 2: Table Of Contents

    FILE NO. SVM-13074 CONTENTS 1. SAFETY PRECAUTIONS ................3 2. SPECIFICATIONS ..................6 3. REFRIGERANT R410A ................9 4. CONSTRUCTION VIEWS ................ 17 5. WIRING DIAGRAM .................. 19 6. SPECIFICATIONS OF ELECTRICAL PARTS ......... 20 7. REFRIGERANT CYCLE DIAGRAM ............21 8.

  • Page 3: Safety Precautions

    FILE NO. SVM-13074 1. SAFETY PRECAUTIONS Installing, staring up, and servicing air-conditioning equipment can be hazardous due to system pressures, electrical components, and equipment location (roofs, elevated structures, etc.). Only trained, qualified installers and service mechanics should install, start-up, and service this equipment. Untrained personnel can perform basic maintenance functions such as cleaning coils.
  • Page 4 FILE NO. SVM-13074 DANGER FOR USE BY QUALIFIED PERSONS ONLY. • • TURN OFF MAIN POWER SUPPLY BEFORE.ATTEMPTING ANY ELECTRICAL WORK. MAKE SURE ALL POWER SWITCHES ARE OFF. FAILURE TO DO SO MAY CAUSE ELECTRIC SHOCK. • CONNECT THE CONNECTING CABLE CORRECTLY. IF THE CONNECTING CABLE IS CONNECTED WRONGLY, ELECTRIC PARTS MAY BE DAMAGED.
  • Page 5 FILE NO. SVM-13074 CAUTION CAUTION • Exposure of unit to water or other moisture before installation could result in electric shock. Do not store it in a wet basement or expose to rain or water. • After unpacking the unit, examine it carefully for possible damage. Report any damages to your distributor. Do not install in a place that can increase the vibration of the unit.

  • Page 6: Specifications

    FILE NO. SVM-13074 2. SPECIFICATIONS 2-1. Specification Unit model Indoor RAS-15EKCV-UL RAS-17EKCV-UL Outdoor RAS-15EACV-UL RAS-17EACV-UL Cooling capacity (Btu/h) 15000 16200 Cooling capacity range (Btu/h) 2750 - 17050 3750 - 20450 Power supply 1Ph, 60hz, 208V/230V 1Ph, 60hz, 208V/230V Electric Indoor...
  • Page 7 FILE NO. SVM-13074 Unit model Indoor RAS-22EKCV-UL Outdoor RAS-22EACV-UL Cooling capacity (Btu/h) 21400 Cooling capacity range (Btu/h) 4100-22500 Power supply 1Ph, 60hz, 208V/230V Electric Indoor Operation mode Cooling characteristic Running current (208-230V) 0.40-0.36 Power consumption (208-230V) Power factor Outdoor Operation mode Cooling Running current (208-230V) 12.4 - 11.14...

  • Page 8: Operation Characteristic Curve

    Indoor: DB80°F/WB67°F (DB26.7°C/WB19.4°C) Indoor Air-Flow Volume: High Pipe Length: 25 ft (7.5m) Capacity Ratio: 100% = 15000 Btu/h (RAS-15EKCV-UL) 16200 Btu/h (RAS-17EKCV-UL) 21400 Btu/h (RAS-22EKCV-UL) 90 91 93 95 97 99 100 102 104 106 108 109 111 113 115 (32)(33)(34)(35)(36)(37)(38)(39)(40)(41)(42)(43)(44)(45)(46) Outdoor Temperature [°F(°C)]...

  • Page 9: Refrigerant R410A

    FILE NO. SVM-13074 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 10 FILE NO. SVM-13074 Table 3-2-1 Thicknesses of annealed copper pipes Thickness in. (mm) Nominal diameter (in.) Outer diameter (mm) R410A 6.35 0.0315 (0.80) 0.0315 (0.80) 9.52 0.0315 (0.80) 0.0315 (0.80) 0.0315 (0.80) 0.0315 (0.80) 12.70 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 11 FILE NO. SVM-13074 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 12 FILE NO. SVM-13074 Table 3-2-6 Flare and flare nut dimensions for R22 Dimension in. (mm) Nominal Outer diameter Thic kness Flare nut width diameter (mm) in. (mm) in. (mm) 6.35 0.0315 (0.8 ) 0.354 (9.0) 0.669 (17) 0.362 (9.2) 0.256 (6.5) 0.512 (13) 9.52 0.0315 (0.8 ) 0.512 (13.0)
  • Page 13 FILE NO. SVM-13074-2 3-3. Tools 3-3-1. Required Tools The service port diameter of packed valve of the outdoor unit in the air conditioner 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 ∅...

  • Page 14: Recharging Of Refrigerant

    FILE NO. SVM-13074 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 −...
  • Page 15 FILE NO. SVM-13074 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 16 FILE NO. SVM-13074 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 17: Construction Views

    FILE NO. SVM-13074 4. CONSTRUCTION VIEWS 4-1. Indoor Unit 41-5/16(1050) Unit : Inch (mm) Heat exchanger Grille Inlet Air inlet Air filter 8-15/16(228) Front panel Knockout for leftward Knockout for rightward piping piping 1-15/16(50) 1-15/16(50) Air outlet Knockout for bottom leftward piping 3-1/16(78) 2-13/16(72) 2-13/16(72)
  • Page 18 FILE NO. SVM-13074 4-2. Outdoor Unit Unit : Inch (mm) 4-1/4 (108) 4-15/16 (125) Ø1 (Ø25) Water Drain Outlet 23-5/8 (600) 1-31/32 (50) R19/32 1-27/64 (36) (R15) Ø1/4 Hole (Ø6) Hole R19/32 (R15) 1-27/64 (36) R7/32 Ø7/16x9/16 Oval-Hole (R5.5) 1-31/32 (50) (Ø11x14) Oval-Hole Ø1/4 Hole 23-5/8 (600)

  • Page 19: Wiring Diagram

    FILE NO. SVM-13074 5. WIRING DIAGRAM – 19 –...

  • Page 20: Specifications Of Electrical Parts

    FILE NO. SVM-13074 6. SPECIFICATIONS OF ELECTRICAL PARTS 6-1. Indoor Unit Parts name Type Specifications ICF-340U30-2 DC340V, 30W Fan motor (for indoor) ( − ) Ω Room temp. sensor (TA-sensor) at 25°C − Heat exchanger temp. sensor (TC-sensor) 10kΩ at 25°C Louver motor Output (Rated) 1W, 12 poles, DC12V MSBPC20F04...

  • Page 21: Refrigerant Cycle Diagram

    FILE NO. SVM-13074-1 7. REFRIGERANT CYCLE DIAGRAM 7-1. Refrigerant Cycle Diagram RAS-15EKCV-UL / RAS-15EACV-UL, RAS-17EKCV-UL / RAS-17EACV-UL T1 Temp. measurement INDOOR UNIT Indoor heat exchanger Max. : 66ft (20m) Cross flow fan Min. : 6.6ft (2m) Chargeless : 50ft (15m)
  • Page 22 FILE NO. SVM-13074-1 RAS-22EKCV-UL / RAS-22EACV-UL T1 Temp. measurement INDOOR UNIT Indoor heat exchanger Max. : 66ft (20m) Cross flow fan Min. : 6.6ft (2m) Chargeless : 50ft (15m) Pressure measurement Deoxidized copper pipe Charge : 0.22oz/ft (20g/m) Gauge attaching port Outer dia.
  • Page 23 FILE NO. SVM-13074 7-2. Op eration Data <Cooling> Tempeature Model name Standard Heat exchanger Indoor Outdoor Compressor condition [°F (°C)] RAS- pressure pipe temp. fan mode fan mode revolution Indoor Outdoor P [psi (MPa)] T1 [°F (°C)] T2 [°F (°C)] (rps) 80/67 98/75...

  • Page 24: Control Block Diagram

    FILE NO. SVM-13074-1 8. CONTROL BLOCK DIAGRAM 8-1. Indoor Unit Indoor Unit Control Unit M.C.U. Louver Functions Motor Heat Exchanger Sensor (Tc) Room Temperature Sensor (Ta) Louver Motor • 3-minute Delay at Restart for Compressor Drive Control Infrared Rays Signal Receiver •...
  • Page 25 FILE NO. SVM-13074 8-2. Outdoor Unit (Inverter Assembly) – 25 –...

  • Page 26: Operation Description

    FILE NO. SVM-13074 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. Its system can control the speed of to IGBT module (Compressor stop function) compressor motor according to load.
  • Page 27 FILE NO. SVM-13074 9-2. Operation Description 1. Basic operation ......................28 1. Operation control ...................... 28 2. Cooling operation ..................... 29 3. AUTO operation ....................... 29 4. DRY operation ......................29 2. Indoor fan motor control ....................30 3. Outdoor fan motor control ....................31 4.

  • Page 28: Operation Description

    FILE NO. SVM-13074 9-2. Operation Description 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 29: Cooling Operation

    FILE NO. SVM-13074 Item Operation flow and applicable data, etc. Description 1. Basic 2. Cooling operation operation The operations are performed in the following parts by controls according to cooling conditions. 1) Receiving the operation ON signal of the remote controller, the cooling operation signal starts being transferred form the indoor controller to the outdoor unit.

  • Page 30: Indoor Fan Motor Control

    *5 : Fan speed = [(M+) –L] x 1/4 + L +2.0(+1.0) +1.0 (+0.5) (Linear approximation L(W6) from M+ and L) (Table 1) Indoor fan air flow rate RAS-15EKCV-UL RAS-17EKCV-UL, RAS-22EKCV-UL Fan speed COOL level Fan speed Air flow rate...

  • Page 31: Outdoor Fan Motor Control

    FILE NO. SVM-13074 Item Operation flow and applicable data, etc. Description 3. Outdoor fan The speed of the outdoor unit side is controlled according 1) The operation command sent motor control from the remote controller is to speed of compressor motor (rps) and outdoor processed by the indoor unit temperature (To).

  • Page 32: Capacity Control

    FILE NO. SVM-13074-1 Item Operation flow and applicable data, etc. Description 4. Capacity The cooling capacity depending on the load is adjusted. 1) The difference between set control temperature on remote controller According to difference between the setup value of tempera- (Ts) and room temperature (Ta) ture and the room temperature, the capacity is adjusted by is calculated.

  • Page 33: Release Protective Control By Temperature Of Indoor Heat Exchanger

    FILE NO. SVM-13074 Item Operation flow and applicable data, etc. Description 6. Release <In cooling/dry operation> 1) When temperature of the indoor heat exchanger protective (Prevent-freezing control for indoor heat exchanger) drops below 41°F (5°C), control by In cooling/dry operation, the sensor of indoor heat the compressor speed is temperature exchanger detects evaporation temperature and...

  • Page 34: Temporary Operation

    FILE NO. SVM-13074 Item Operation flow and applicable data, etc. Description 8. 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: Pulse Modulating Valve (P .M.v.) Control

    FILE NO. SVM-13074 Item Operation flow and applicable data, etc. Description 10. 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 36: Self-Cleaning Function

    FILE NO. SVM-13074 Item Operation flow and applicable data, etc. Description 11. 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 37: Selt-Cleaning Function Release

    FILE NO. SVM-13074 Item Operation flow and applicable data, etc. Description • Self-Cleaning diagram 11. 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 38: Remote-A Or B Selection

    FILE NO. SVM-13074 Item Operation flow and applicable data, etc. Description 13. 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 39: Quiet Mode

    FILE NO. SVM-13074 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: One-Touch Comfort

    FILE NO. SVM-13074 Item Operation flow and applicable data, etc. Description One touch comfort is the fully automated operation 17. One-Touch When an indoor unit receives "One Touch that is set according to the preferable condition in Comfort Comfort Signal" from the remote controller, a region.

  • Page 41: Auto Restart Function

    FILE NO. SVM-13074 9-3. Auto Restart Function This indoor unit is equipped with an automatic restarting function which allows the unit to restart operating with the set operating conditions in the event of a power supply being accidentally shut down. The operation will resume without warning 3 minutes after power is restored.

  • Page 42: How To Cancel The Auto Restart Function

    FILE NO. SVM-13074 9-3-2. How to Cancel the Auto Restart Function To cancel auto restart function, proceed as follows : Repeat the setting procedure : the unit receives the signal and beeps 3 times. The unit will be required to be turned on with the remote controller after the main power supply is turned off. •...

  • Page 43: Remote Control

    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

    FILE NO. SVM-13074-2 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 operation (except in DRY and FAN ONLY mode) Press HI-POWER : Start and stop the operation.
  • Page 45 FILE NO. SVM-13074 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-13074 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 The time setting for timer operation or the clock indicates when the time is indicated.

  • Page 47: Installation Procedure

    FILE NO. SVM-13074 10. INSTALLATION PROCEDURE 10-1. Installation Diagram of Indoor and Outdoor Units For the rear left and left piping Hook Installation Air inlet grille Wall plate Insert the cushion between the indoor unit and wall, and tilt the indoor unit for better operation.
  • Page 48 FILE NO. SVM-13074 10-2. Installation 10-2-1. Field supplied installation part Part Parts name Q'ty Code Refrigerant piping Liquid side : ∅1/4 in. (∅ 6.35 mm) each Gas side ∅ 3/8 in. (∅ 12.70 mm) Pipe insulating material (polyethylene foam, 5/16 in. (8 mm) thick) Putty, PVC tapes each <Fixing bolt arrangement of outdoor unit>...
  • Page 49 Remote control holder x 1 Flat head wood screw ∅3.1 x 16 s x 2 Toshiba New IAQ filter (L) x 1 Wireless remote control x 1 Toshiba New IAQ filter (L) x 1 Screw ∅4 x 10 s x 2...
  • Page 50 FILE NO. SVM-13074 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 FILE NO. SVM-13074 10-3. Outdoor Unit CAUTION 10-3-1. Installation Location 1. Install the outdoor unit in a location where there • A location which provides enough spaces around are no obstructions near its air intake or air outlet. the outdoor unit as shown in the diagram above. 2.

  • Page 52: Electrical Work

    FILE NO. SVM-13074 10-3-4. Electrical Work Outer dia. of copper pipe Tightening torque Ø1/4 in. (Ø6.35 mm) 10 to 13 lbf.ft (14 to 18 N·m) WARNING Ø3/8 in. (Ø12.70 mm) 37 to 46 lbf.ft (50 to 62 N·m) ELECTRICAL SHOCK HAZARD Failure to follow this warning could result in personal Tightening torque for connection of flare pipe injury or death.
  • Page 53 FILE NO. SVM-13074 Stripping length of the Power supply cord Lock nut and Interconnecting cable Valve cover Conduit plate Terminal block Connector Interconnecting cable Power supply cord Fig. 10-3-8 Fig. 10-3-6 CAUTION Wrong wiring connection may cause some Unit : inch (mm) •...
  • Page 54 CAUTION FILE NO. SVM-13074 10-4. Indoor Unit NOTE : • When drilling a wall that contains a metal lath, 10-4-1. Installation Location wire lath or metal plate, be sure to use a pipe hole • A location which provides clearances around the brim ring sold separately.
  • Page 55 FILE NO. SVM-13074 3/16 in. (5 mm) dia. hole CAUTION CAUTION • Be sure to refer to the system wiring diagram located inside the front panel. 7 Mounting screw Ø5/32 in. x 1 in. • Check local electrical codes and also any ( ∅...
  • Page 56 FILE NO. SVM-13074 10-4-3. How to connect remote controller for wire operation> (Optional) 70 mm * Wire size 28-22AWG Indoor unit or 0.08-0.32 mm Outer diameter not over 4.7 mm, control wire length 30 m. or less. 5 mm Control wire Control wire out position Remote controller Control wire...
  • Page 57 FILE NO. SVM-13074 INSULATE BOTH LINES EXPLOSION HAZARD WARNING : Do not install batteries for hard wire installation Rear right Rear left Control wire Control wire Bottom left Screw (∅3.1 x 16L) for Remote controller hang remote controller Left hanger Bottom right Remote controller Wall...
  • Page 58 FILE NO. SVM-13074 <Left-hand connection with piping> How to fix the drain cap 1) Insert a hexagon wrench 3/16 in. (4 mm) Bend the connecting pipe so that it is laid within 1-5/8 in. in the center head of the cap. (43 mm) above the wall surface.

  • Page 59: Indoor Unit Fixing

    FILE NO. SVM-13074 10-3-6. Indoor Unit Fixing 10-3-7. Drainage 1. Pass the pipe through the hole in the wall and 1. Run the drain hose at a downward sloped angle. hook the indoor unit on the installation plate at NOTE : the upper hook.
  • Page 60 FILE NO. SVM-13074 Remote control Remote control A-B selection • Place the remote control away from obstacles (such In case of two systems operating nearby, follow the as curtain) that may block the signal coming form the instructions below to set the remote control to operate remote control.
  • Page 61 FILE NO. SVM-13074 10-5. EVACUATING CAUTION 5 IMPORTANT POINTS FOR PIPING WORK. 10-5-1. Evacuating • After the piping has been connected to the indoor unit, (1) Take away dust and moisture (inside of the you vacuum both units as once. connecting pipes).

  • Page 62: System Requirements

    CEC (Canadian Electrical Code) for special requirements. The following are the electrical requirements. Outer Thickness Thickness Outer diameter • Diameter In. (mm) In. (mm) In. (mm) In. (mm) Product RAS-15EKCV-UL RAS-22EKCV-UL Ø1/4 (6.35) 0.03 (0.8) Ø3/8 (9.52) 0.03 (0.8) RAS-17EKCV-UL Model RAS-15EACV-UL RAS-22EACV-UL Insulation RAS-17EACV-UL Item Both lines need to be insulated.

  • Page 63: Auto Restart Setting

    FILE NO. SVM-13074-1 10-7. OTHERS 10-7-3. Auto Restart Setting This product is designed so that after a power failure 10-7-1. Gas Leak Test it can restart automatically in the same operating mode as before the power failure. Valve cover Information Check places for flare nut connection The product was shipped with Auto Restart function...

  • Page 64: How To Diagnose The Trouble

    FILE NO. SVM-13074 11. HOW TO DIAGNOSE THE TROUBLE The pulse motor circuits are mounted to both indoor and outdoor units. Therefore, diagnose troubles according to the trouble diagnosis procedure as described below. (Refer to the check points in servicing written on the wiring diagrams attached to the indoor/outdoor units.) Table 11-1 Troubleshooting Procedure First Confirmation...
  • Page 65 FILE NO. SVM-13074 CAUTION A high voltage (equivalent to the supply voltage) is also energized to ground through the sensors, PMV and other low-voltage circuits. The sensor leads and other wires are covered with insulated tubes for protection. Nevertheless, care must be taken to ensure that these wires are not pinched. Take sufficient care to avoid directly touching any of the circuit parts without first turning off the power.

  • Page 66: First Confirmation

    FILE NO. SVM-13074-1 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 208–230 ± 10%. If power voltage is not in this range, the unit may not operate normally. 11-1-3.

  • Page 67: Primary Judgment

    FILE NO. SVM-13074 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 68 FILE NO. SVM-13074 11-4. Self-Diagnosis by Remote Controller (Check Code) 1. If the lamps are indicated as shown B to E in Table 11-3-1, execute the self-diagnosis by the remote controller. 2. When the remote controller is set to the service mode, the indoor controller diagnoses the operation condition and indicates the information of the self-diagnosis on the display of the remote controller with the check codes.
  • Page 69 FILE NO. SVM-13074 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 70 FILE NO. SVM-13074 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 71 FILE NO. SVM-13074 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 72 FILE NO. SVM-13074 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 73 FILE NO. SVM-13074 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 74: Judgement Of Trouble By Every Symptom

    FILE NO. SVM-13074 11-5. Judgement of Trouble by Every Symptom 11-5-1. Indoor unit (Including remote controller) Operation (1) Indoor unit is not operated. Check Item Considerable principle cause Turn off power supply once, and Measures 5 second later, turn it on again. Item by symptoms Is OPERATION indicator flashing? Is it possible to turn on...
  • Page 75 FILE NO. SVM-13074-1 (3) Only the indoor motor fan does not operate <Primary check> 1. Is it possible to detect the power supply voltage (AC208–230V) between on the terminal block? 2. Does the indoor fan motor operate in cooling operation? Turn off power supply once, and turn it on again.
  • Page 76 FILE NO. SVM-13074 Is it possible to Does check display Replace change airflow level remote on remote show high? to “HIGH”? Change the new PC Replace board. Does fan speed motor change? Fan motor operates normally. Is it possible to Does check cross-flow Replace bearing rotate cross-flow fan by...
  • Page 77 FILE NO. SVM-13074-1 (4) Indoor fan motor automatically starts to rotate by turning on power supply <Cause> The IC is built in the indoor fan motor. Therefore the P.C. board is also mounted to inside of the motor. If the P .C. board is soldered imperfectly or the IC is defective, the fan motor may automatically rotate by turning on power supply.
  • Page 78 FILE NO. SVM-13074 (5) Troubleshooting for remote controller <Primary check> Check that A or B selected on the main unit is matched with A or B selected on the remote controller. The unit does not beep at all. Push the [ ] button.
  • Page 79 FILE NO. SVM-13074 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 80 FILE NO. SVM-13074 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 81: How To Diagnose Trouble In Outdoor Unit

    FILE NO. SVM-13074 11-7. How to Diagnose Trouble in Outdoor Unit Check Power Supply (Voltage Rate ±10%) Turn OFF power supply. Remove connector of compressor. • Connect discharge Check 25A resistance (approx. 100Ω, fuse (F01) 40W) or soldering iron failure? (plug) between +, –...
  • Page 82 FILE NO. SVM-13074 Does outdoor fan operate normally? Turn OFF power supply. Does compresser operate normally? Remove connector CN300 of outdoor fan motor. Check winding resistance by ohmmeter are correct? Compressor Check rotor locking by rotate is normal with hand. Can it rotate? Turn OFF power supply.

  • Page 83: How To Check Simply The Main Parts

    FILE NO. SVM-13074-1 11-8. How to Check Simply the Main Parts (2) Inspection procedures 1) When a P.C. board is judged to be defective, 11-8-1. How to check the P.C. board (Indoor unit) check for disconnection, burning, or discolora- tion of the copper foil pattern or this P.C. board. (1) Operating precautions 2) The P.C.
  • Page 84 FILE NO. SVM-13074 11-8-2. P.C. Board Layout [1] Sensor characteristic table : Discharge temp. sensor : Room temp. sensor TC, TCJ : Heat exchanger temp. sensor : Outdoor temp. sensor TA, TC, TCJ, TO, TE, TS : Outdoor heat exchanger temp. sensor : Suction temp.
  • Page 85 FILE NO. SVM-13074 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 86 FILE NO. SVM-13074 11-8-5. 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 87 FILE NO. SVM-13074 11-9. How to Simply Judge Whether Outdoor Fan Motor in Good or Bad 1. Symptom • Outdoor fan motor does not rotate. • Outdoor fan motor stops within several 10 seconds though it started rotating. • Outdoor fan motor rotates or does not rotate according to the position where the fan stopped, etc. Remote controller check code “02 : Outdoor block, 1A : Outdoor fan drive system error”...

  • Page 88: How To Replace The Main Parts

    FILE NO. SVM-13074 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 89 FILE NO. SVM-13074 Part name Procedures Remarks Front panel 4) Press "PUSH" part under the front panel  and remove hooks of the front panel from the installation plate. Installation plate Front panel Press 5) Remove the front panel fixing screws. (4 pcs.) 6) Take off four hooks of panel from rear side.
  • Page 90 FILE NO. SVM-13074 Part name Procedures Remarks Electric parts ‚ 1) Remove screw of earth lead attached to the box assembly end plate of the evaporator. 2) Remove the lead wire cover, and remove connector for the fan motor and connec- tor for the louver motor from the electric parts box assembly.
  • Page 91 FILE NO. SVM-13074 Part name Procedures Remarks ƒ Horizontal louver 1) Remove shaft of the horizontal louver from the back body. (First remove the left shaft, and then remove other shafts while sliding the horizontal louver leftward.) „ Evaporator 1) Follow to the procedure in the item ‚...
  • Page 92 FILE NO. SVM-13074 Part name Procedures Evaporator 4) Remove three fixing screw at the right (Heat exchanger) side of the heat exchanger, and separate the heat exchanger from the back body. (Figure 4, 5) <How to assemble the heat exchanger> Heat exchanger assembly on the back body, One screw and secure it using the fixing screw without...
  • Page 93 FILE NO. SVM-13074 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 94 FILE NO. SVM-13074 Part name Procedures Remarks Cross flow fan <Caution at reassembling> 1) To incorporate the fan motor incorporate the motor into the position in the following figure, and then install the fan motor. • Install the cross flow fan so that the right end of the 1st joint from the right of the cross flow fan is set keeping 5.0 mm from closed wall of the main unit.
  • Page 95 FILE NO. SVM-13074 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 96 FILE NO. SVM-13074 12-3. Outdoor Unit Part name Procedure Remarks  Common 1. Detachment procedure NOTE Wear gloves for this job. Otherwise, you may injure your hands on the parts, etc. 1) Stop operation of the air conditioner, and turn off the main switch of the breaker for air conditioner.
  • Page 97 FILE NO. SVM-13074 Part name Procedure Remarks Front cabinet ‚ 1. Detachment 1) Perform step 1 in  2) Remove the fixing screws (screw 2 pcs.) used to secure the front cabinet and inverter cover, the screws (screw 3 pcs.) used to secure the front cabinet at the bottom, the screw used to secure the front and side cabinet (Right), and the...
  • Page 98 FILE NO. SVM-13074 Part name Procedure Remarks Inverter 1) Perform work of item 1 in ƒ  Inverter cover assembly 2) Remove screw (screw 2 pcs.) of the upper part of the front cabinet. P.C. board (Soldered surface) • If removing the inverter cover in this condition, P .C.
  • Page 99 FILE NO. SVM-13074-2 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 • 3 leads (black, white, orange) connected to CN603 terminal block. CN601 CN600 CN701...
  • Page 100 FILE NO. SVM-13074 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 used to secure the side cabinet and heat exchanger. 3) Remove the fixing screw (screw 2 pcs.) used to secure the plate conduit and side cabinet.
  • Page 101 FILE NO. SVM-13074 Part name Procedure Remarks Compressor 1) Perform work of item 1 of ‡  ‚ ƒ „ … 2) Extract refrigerant gas. 3) Remove the partition board. (screw 3 pcs.) 4) Remove the sound-insulation material. 5) Remove terminal cover of the compressor, and disconnect lead wire of the compressor from the terminal.
  • Page 102 FILE NO. SVM-13074 Part name Procedure Remarks Electronic ‰ 1. Detachment expansion valve 1) Perform step 1 in ‚ , all the steps in ƒ 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 103 FILE NO. SVM-13074 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. Detail C TS sensor (Suction pipe temperature sensor) • Attachment Install the senser onto the straight pipe part of the suction pipe.

  • Page 104: Exploded Views And Parts List

    FILE NO. SVM-13074 13. EXPLODED VIEWS AND PARTS LIST 13-1. Indoor Unit (E-Part) Location Part Location Part Description Description 43T50327 SENSOR HEAT EXCHANGER 43T6V420 PC-BOARD(RAS-15EKCV-UL) 43T60402 TERMINAL:3P 43T6V421 PC-BOARD(RAS-17EKCV-UL) 43T50325 TEMPERATURE SENSOR 43T6V422 PC-BOARD(RAS-22EKCV-UL) 43T62003 CORD CLAMP 43T21434 STEPPING-MOTOR 43T6V316 PC BOARD ASSY;WRS-LED...
  • Page 105 FILE NO. SVM-13074 13-2. Indoor Unit Location Part Location Part Description Description 43T00052 PANEL ASSY, SERVICE 43T39022 BAND, MOTOR, RIGHT UP 43T09492 GRILLE OF AIR INLET 43T39023 BAND,MOTOR, RIGHT DOWN 43T03014 BODY ASSY, BACK 43T44030 EVAPORATOR ASSY 43T80331 FILTER-AIR 43T19333 HOLDER, SENSOR 43T09040 LOUVER, HORIZONTAL...
  • Page 106 FILE NO. SVM-13074 13-3. Outdoor Unit Location Part Location Part Description Description 43T00535 FRONT CABINET 43T63325 COIL PMV 43T00459 LEFT CABINET 43T58306 REACTOR 43T42327 BASE PLATE ASSEMBLY 43T20319 PROPELLER FAN 43T00452 UPPER CABINET 43T21419 FAN-MOTOR 43T19342 WIRE GUARD 43T47001 NUT FLANGE 43T00540 PACKED VALVE COVER 43T97001...
  • Page 107 FILE NO. SVM-13074 13-4. P.C. Board Layout Location Part Location Part Description Description 43T62320 HEATSINK (RAS-15,17EACV-UL) 43T60403 FUSE 43T62331 HEATSINK (RAS-22EACV-UL) 43T50328 TEMPERATURE SENSOR 43T6V429 PC-BOARD (RAS-15EACV-UL) 43T62313 BASE-PLATE-PC 43T6V430 PC-BOARD (RAS-17EACV-UL) 43T50329 SENSOR,HEAT EXCHANGER 43T6V431 PC-BOARD (RAS-22EACV-UL) 43T50330 SENSOR,HEAT EXCHANGER 43T60404 TERMINAL-5P 43T50331...
  • Page 108 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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