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Toshiba Carrier RAS-12EKCV-UL Service Manual

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FILE NO. SVM-13071

SERVICE MANUAL

SPLIT TYPE
Indoor Unit
Outdoor Unit
RAS-09EKCV-UL
RAS-09EACV-UL
RAS-12EKCV-UL
RAS-12EACV-UL
R410A
November, 2013
Table of Contents
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Summary of Contents for Toshiba Carrier RAS-12EKCV-UL

  • Page 1: Service Manual

    FILE NO. SVM-13071 SERVICE MANUAL SPLIT TYPE Indoor Unit Outdoor Unit RAS-09EKCV-UL RAS-09EACV-UL RAS-12EKCV-UL RAS-12EACV-UL R410A November, 2013...

  • Page 2: Table Of Contents

    FILE NO. SVM-13071 CONTENTS 1. SAFETY PRECAUTIONS ................3 2. SPECIFICATIONS ..................6 3. REFRIGERANT R410A ................8 4. CONSTRUCTION VIEWS ................ 16 5. WIRING DIAGRAM .................. 18 6. SPECIFICATIONS OF ELECTRICAL PARTS ......... 20 7. REFRIGERANT CYCLE DIAGRAM ............21 8.

  • Page 3: Safety Precautions

    FILE NO. SVM-13071 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-13071 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-13071 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-13071 2. SPECIFICATIONS 2-1. Specification Unit model Indoor RAS-09EKCV-UL RAS-12EKCV-UL Outdoor RAS-09EACV-UL RAS-12EACV-UL Cooling capacity (Btu/h) 9000 12000 Cooling capacity range (Btu/h) 3750 - 10580 2750 - 13950 Power supply 1Ph, 60hz, 208V/230V 1Ph, 60hz, 208V/230V Electric Indoor...

  • Page 7: Operation Characteristic Curve

    Pipe Length: 16 ft (5m) Voltage : 230V Capacity Ratio: 100% = 9000 Btu/h (RAS-09EKCV-UL) 12000 Btu/h (RAS-12EKCV-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)] – 7 –...

  • Page 8: Refrigerant R410A

    FILE NO. SVM-13071 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 9 FILE NO. SVM-13071 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 10 FILE NO. SVM-13071 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 FILE NO. SVM-13071 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 12 FILE NO. SVM-13071 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 ∅...

  • Page 13: Recharging Of Refrigerant

    FILE NO. SVM-13071 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 14: Brazing Of Pipes

    FILE NO. SVM-13071 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 FILE NO. SVM-13071 2. Characteristics required for flux 3-5-3. Brazing • Activated temperature of flux coincides with the As brazing work requires sophisticated techniques, brazing temperature. experiences based upon a theoretical knowledge, it must be performed by a person qualified. •...

  • Page 16: Construction Views

    4. CONSTRUCTION VIEWS FILE NO. SVM-13071 4-1. Indoor Unit Unit : Inch (mm) 31-1/8(790) Grille Inlet Air filter Air inlet 8-1/16(205) Front panel Knockout for rightward piping Knockout for leftward piping Heat exchanger 1-7/8(48) 1-7/8(48) Air outlet Knockout for bottom leftward piping 2-7/16(62) 2-11/16(69) Knockout for bottom rightward piping...

  • Page 17: Outdoor Unit

    FILE NO. SVM-13071 4-2. Outdoor Unit Unit : Inch (mm) Ø1 (Ø25) Water Drain Outlet 4-1/4 ( 108) 4-15/16 (125) 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) (Ø11x14) Oval-Hole 1-31/32 (50) Ø1/4 Hole...

  • Page 18: Wiring Diagram

    FILE NO. SVM-13071 5. WIRING DIAGRAM 5-1. RAS-09EKCV-UL / RAS-09EACV-UL – 18 –...
  • Page 19 FILE NO. SVM-13071 5-2. RAS-12EKCV-UL / RAS-12EACV-UL – 19 –...

  • Page 20: Specifications Of Electrical Parts

    6. SPECIFICATIONS OF ELECTRICAL PARTS 6-1. Indoor Unit Type Specifications Parts name RAS-09EKCV-UL AFN-220-20-4D AC240V, 20W Fan motor (for indoor) RAS-12EKCV-UL ICF-340U30-2 DC 340, 30W ( − ) Ω Room temp. sensor (TA-sensor) at 25°C − Heat exchanger temp. sensor (TC-sensor) 10kΩ at 25°C...

  • Page 21: Refrigerant Cycle Diagram

    FILE NO. SVM-13071 7. REFRIGERANT CYCLE DIAGRAM 7-1. Refrigerant Cycle Diagram RAS-09EKCV-UL / RAS-09EACV-UL Temp. measurement INDOOR UNIT Indoor heat exchanger Cross flow fan Max. : 66ft (20m) Min. : 6.6ft (2m) Pressure measurement Chargeless : 50ft (15m) Deoxidized copper pipe Gauge attaching port Outer dia.
  • Page 22 FILE NO. SVM-13071 RAS-12EKCV-UL / RAS-12EACV-UL Temp. measurement INDOOR UNIT Indoor heat exchanger Cross flow fan Max. : 66ft (20m) Min. : 6.6ft (2m) Pressure measurement Chargeless : 50 ft (15m) Deoxidized copper pipe Gauge attaching port Charge : 0.22oz/ft Outer dia.

  • Page 23: Operation Data

    FILE NO. SVM-13071 7-2. Operation Data Tempeature Model name Standard Heat exchanger Indoor Outdoor Compressor condition(°C) RAS- pressure pipe temp. fan mode fan mode revolution Indoor Outdoor P Psia (MPa) T1 °F (°C) T2 °F (°C) (rps) 80/67 98/75 137 to 160 54 to 57 99 to 102...

  • Page 24: Control Block Diagram

    FILE NO. SVM-13071 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 25 FILE NO. SVM-13071 8-2. Outdoor Unit (Inverter Assembly) – 25 –...

  • Page 26: Operation Description

    FILE NO. SVM-13071 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-13071 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: Basic Operation

    FILE NO. SVM-13071 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-13071 Operation flow and applicable data, etc. Description Item 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 Fan speed RAS-09EKCV-UL RAS-12EKCV-UL level COOL Fan speed Air flow rate Fan speed Air flow rate (rpm) cfm (m...

  • Page 31: Outdoor Fan Motor Control

    FILE NO. SVM-13071 Item Operation flow and applicable data, etc. Description 3. Outdoor fan The speed of the outdoor unit motor 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-13071 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 (Ts) and room temperature (Ta) temperature and the room temperature, the capacity is is calculated.

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

    FILE NO. SVM-13071 Item Operation flow and applicable data, etc. Description 6. Release protective 1) When temperature of the indoor control by tempera- heat exchanger drops below 41°F (Prevent-freezing control for indoor heat exchanger) ture of indoor heat (5°C), the compressor speed is In cooling/dry operation, the sensor of indoor heat exchanger...

  • Page 34: Louver Control

    FILE NO. SVM-13071 Item Operation flow and applicable data, etc. Description 7. Louver control This function controls the air direction of the indoor unit. 1) Louver • The position is automatically controlled initial setting of "Cooling position storage position" Louver : (Directs downward 35.3°...

  • Page 35: Eco Operation

    FILE NO. SVM-13071 Item Operation flow and applicable data, etc. Description 8. ECO When pressing [ECO] button on the remote controller, a operation Economic operation is performed. 1) The control target temperature increase 1.0°F (0.5ºC) per hour This function operates the air conditioner with the up to 3.5°F (2°C) starting from the difference between the set and the room temperature as...

  • Page 36: Discharge Temperature Control

    FILE NO. SVM-13071 Item Operation flow and applicable data, etc. Description 10. Discharge temperature control 1. Purpose This function detects error on the Td value Control operation refrigerating cycle or error on the com- Judges as an error and stops the compressor. pressor, and performs protective control.

  • Page 37: Self-Cleaning Function

    FILE NO. SVM-13071 Item Operation flow and applicable data, etc. Description 12. 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: Selt-Cleaning Function Release

    FILE NO. SVM-13071 Item Operation flow and applicable data, etc. Description 12. Self-Cleaning • Self-Cleaning diagram function Operation display FCU fan rpm is depend on presetting. (500RPM) OPEN (12.7º) FCU louver OPEN CLOSE ON or OFF ON or OFF Timer display depend on presetting of timer function.

  • Page 39: Remote-A Or B Selection

    FILE NO. SVM-13071 Item Operation flow and applicable data, etc. Description 14. 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 40: Quiet Mode

    FILE NO. SVM-13071 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 41: One-Touch Comfort

    FILE NO. SVM-13071 Item Operation flow and applicable data, etc. Description 18. One-Touch One touch comfort is the fully automated operation When an indoor unit receives "One Touch Comfort that is set according to the preferable condition in Comfort Signal" from the remote controller, a region.

  • Page 42: Auto Restart Function

    FILE NO. SVM-13071 9-3. Auto Restart Function This indoor unit is equipped with an automatic restarting function which allows the unit to restart operating with the set operating conditions in the event of a power supply being accidentally shut down. The operation will resume without warning three minutes after power is restored.

  • Page 43: How To Cancel The Auto Restart Function

    FILE NO. SVM-13071 9-3-2. How to Cancel the Auto Restart Function To cancel auto restart function, proceed as follows : Repeat the setting procedure : the unit receives the signal and beeps three times. The unit will be required to be turned on with the remote controller after the main power supply is turned off. •...

  • Page 44: Remote 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 45 FILE NO. SVM-13071 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).
  • Page 46 FILE NO. SVM-13071 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 47: Name And Functions Of Indications On Remote Controller

    FILE NO. SVM-13071 9-4-3. Name and Functions of Indications on Remote Controller [Display] All indications, except for the clock time indicator, are displayed by pressing the button. Transmission mark TIMER and clock time indicator This transmission mark indicates when the The time setting for timer operation or the clock remote controller transmits signals to the indoor time is indicated.

  • Page 48: Installation Procedure

    FILE NO. SVM-13071 10. INSTALLATION PROCEDURE 10-1. Installation Diagram of Indoor and Outdoor Units For the rear left and left piping Hook Installation Wall plate Air inlet grille Insert the cushion between the indoor unit and wall, and tilt the indoor unit for better operation.
  • Page 49 FILE NO. SVM-13071 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. (∅ 9.52 mm) Pipe insulating material (polyethylene foam, 5/16 in. (8 mm) thick) Putty, PVC tapes each ...
  • Page 50 Installation plate x 1 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 Battery x 2...

  • Page 51: Installation/Servicing Tools

    FILE NO. SVM-13071 10-2-3. Installation/Servicing Tools Changes in the product and components In the case of an air conditioner using R410A, in order to prevent any other refrigerant from being charged accidentally, the service port diameter of the outdoor unit control valve (3 way valve) has been changed. (1/2 UNF 20 threads per inch) •...

  • Page 52: Installation Location

    FILE NO. SVM-13071 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 53: Electrical Work

    FILE NO. SVM-13071 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. (Ø9.52 mm) 24 to 31 lbf.ft (33 to 42 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 54 FILE NO. SVM-13071 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 55: Indoor Unit

    CAUTION FILE NO. SVM-13071 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 56: Wiring Connection

    FILE NO. SVM-13071 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 57 FILE NO. SVM-13071 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 Notch to route the remote wire through Remote controller...
  • Page 58 FILE NO. SVM-13071 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 59 FILE NO. SVM-13071 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 60: Indoor Unit Fixing

    FILE NO. SVM-13071 10-4-5. Indoor Unit Fixing 2. Put water in the drain pan and make sure that the water is drained out. 1. Pass the pipe through the hole in the wall and 3. When connecting an extension drain hose, hook the indoor unit on the upper hook of the insulate it with shield pipe.
  • Page 61 FILE NO. SVM-13071 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 62 FILE NO. SVM-13071 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 63: System Requirements

    Thickness Thickness Outer diameter • Diameter In. (mm) In. (mm) In. (mm) In. (mm) Product RAS-09EKCV-UL RAS-12EKCV-UL Ø1/4 (6.35) 0.03 (0.8) Ø3/8 (9.52) 0.03 (0.8) Model RAS-09EACV-UL RAS-12EACV-UL Insulation Item Both lines need to be insulated. Use a minimum 5/16 in (8mm) wall thickness.

  • Page 64: Auto Restart Setting

    FILE NO. SVM-13071 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 65: How To Diagnose The Trouble

    FILE NO. SVM-13071 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 66 FILE NO. SVM-13071 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 67: First Confirmation

    FILE NO. SVM-13071 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 68: Primary Judgment

    FILE NO. SVM-13071 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 69: Self-Diagnosis By Remote Controller (Check Code)

    FILE NO. SVM-13071 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 70 FILE NO. SVM-13071 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 71 FILE NO. SVM-13071 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 72 FILE NO. SVM-13071 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 73 FILE NO. SVM-13071 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 74 FILE NO. SVM-13071 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 75: Judgement Of Trouble By Every Symptom

    FILE NO. SVM-13071 11-5. Judgement of Trouble by Every Symptom 11-5-1. Indoor unit (Including remote controller) (1) Indoor unit is not operated. (RAS-09EKCV-UL) n off power Operation supply once, and 5 second later, turn it Check item on again. Conceivable principle cause Is OPERATION Measure...
  • Page 76 FILE NO. SVM-13071 ( RAS-12EKCV-UL) 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...
  • Page 77 FILE NO. SVM-13071 (3) Only the indoor motor fan does not operate 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? (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-09EKCV-UL)
  • Page 78 FILE NO. SVM-13071 ( RAS-12EKCV-UL ) Turn off power supply once, and turn it on again. Is it possible to detect Does fan motor DC 1V or more between – of continue to operate? + and Peplace indoor motor connector (CN 31).
  • Page 79 FILE NO. SVM-13071 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 80 3.1. If fan motor not operate, it means an unit in Auto-restart operation. (see more detail in P. 45-46) 3.2. If Fan motor still operate, means P.C Board mal-function. Replace P.C Board. (For DC fan motor in RAS-12EKCV-UL) The IC is built in the indoor fan motor. Therefore the P.C. board is also mounted to inside of the motor.
  • Page 81 FILE NO. SVM-13071 (5) Troubleshooting for remote controller 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 82 FILE NO. SVM-13071 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 83 FILE NO. SVM-13071 11-6. Check Code 1C (Miswiring in indoor/outdoor units) and 1E 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 84: How To Diagnose Trouble In Outdoor Unit

    FILE NO. SVM-13071 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 85 FILE NO. SVM-13071 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 86 FILE NO. SVM-13071 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 87 FILE NO. SVM-13071 11-8-2. P .C . Board Layout ( RAS-09EKCV-UL ) + 5V + 12V +12V [1] Sensor characteristic table TD : Discharge temp. sensor TA : Room temp. sensor TC : Heat exchanger temp. sensor TO : Outdoor temp. sensor TA, TC, TO, TE, TS TE : Outdoor heat exchanger temp.
  • Page 88 FILE NO. SVM-13071 ( RAS-12EKCV-UL ) [1] Sensor characteristic table TD : Discharge temp. sensor TA : Room temp. sensor TC : Heat exchanger temp. sensor TO : Outdoor temp. sensor TA, TC, TO, TE, TS TE : Outdoor heat exchanger temp. sensor TS : Suction temp.
  • Page 89 FILE NO. SVM-13071 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 (k. ) 20.7 12.6 10.0...
  • Page 90 FILE NO. SVM-13071 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 91 FILE NO. SVM-13071 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 92: How To Replace The Main Parts

    FILE NO. SVM-13071 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 93 FILE NO. SVM-13071 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. (2 pcs.) 6) Take off three hooks of panel from rear side.
  • Page 94 FILE NO. SVM-13071 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 95 FILE NO. SVM-13071 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 ƒ...
  • Page 96 FILE NO. SVM-13071 Part name Procedures Remarks Evaporator „ 7) Unscrew one screw which fix Electrical (Heat exchanger) Control Box and the casing. Move Electrical Control Box until can see one screw that fix Motor band and unscrew it then remove FIX-EVA-DN Screw Screw Tighten the screw of Motor band,...
  • Page 97 FILE NO. SVM-13071 Part name 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 98 FILE NO. SVM-13071 Part name Procedures Remarks ‡ Cross flow fan Fan motor D shaft Double point set screw 1) To incorporate the fan motor incorporate the motor into the position in the following figure, and then install the fan motor. •...
  • Page 99 FILE NO. SVM-13071 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 100 FILE NO. SVM-13071 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 101 FILE NO. SVM-13071 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 (Soldered surface) •...
  • Page 102 FILE NO. SVM-13071 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 103 FILE NO. SVM-13071 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 104 FILE NO. SVM-13071 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 105 FILE NO. SVM-13071 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 106 FILE NO. SVM-13071 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 for 09EACV-UL Detail C for 12EACV-UL TS sensor (Suction pipe temperature sensor) •...

  • Page 107: Exploded Views And Parts List

    13. EXPLODED VIEWS AND PARTS LIST 13-1. Indoor Unit (E-Part) Location Part Location Part Description Description 43T50326 TEMPERATURE SENSOR 43T6V316 PC BOARD ASSY;WRS-LED 43T60401 TERMINAL BLOCK: 3P 43T6V419 PC BOARD(RAS-09EKCV-UL) 43T50325 TEMPERATURE SENSOR 43T6V438 PC BOARD(RAS-12EKCV-UL) 43T62003 CORD CLAMP – 108 –...

  • Page 108: Part Description

    Part Description Description 43T21442 STEPPING-MOTOR 43T39328 MOTOR BAND (LEFT) 43T21409 FAN MOTOR (RAS-09EKCV-UL) 43T39329 MOTOR BAND (RIGHT) 43T21421 FAN MOTOR (RAS-12EKCV-UL) 43T09409 HORIZONTAL LOUVER 43T22312 BEARING ASSY, MOLD 43T79313 CAP, DRAIN 43T70313 HOSE, DRAIN 43T44446 REFRIGERANT CYCLE ASSEMBLY 43T20325 CROSS FLOW FAN ASSEMBLY...
  • Page 109 FILE NO. SVM-13071 13-3. Outdoor Unit Location Part Location Part Description Description 43T00535 FRONT CABINET 43T58306 REACTOR(RAS-12EACV-UL) 43T00459 LEFT CABINET 43T58311 REACTOR(RAS-09EACV-UL) 43T42327 BASE PLATE ASSEMBLY 43T20319 PROPELLER FAN 43T00452 UPPER CABINET 43T21419 FAN-MOTOR 43T19342 WIRE GUARD 43T47001 NUT FLANGE 43T00540 PACKED VALVE COVER 43T97001 NUT 43T41420 COMPRESSOR (RAS-09EACV-UL)
  • Page 110 FILE NO. SVM-13071 13-4. P.C. Board Layout Location Part Location Part Description Description 43T62320 HEATSINK 43T50328 TEMPERATURE SENSOR 43T6V436 PC-BOARD(RAS-09EACV-UL) 43T62313 BASE-PLATE-PC 43T6V437 PC-BOARD(RAS-12EACV-UL) 43T50329 SENSOR,HEAT EXCHANGER 43T60404 TERMINAL-5P 43T50330 SENSOR,HEAT EXCHANGER 43T60403 FUSE 43T50331 SENSOR,HEAT EXCHANGER – 111 –...
  • Page 111 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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Carrier ras-09ekcv-ulCarrier ras-09eacv-ulCarrier ras-12eacv-ul

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