Toshiba RAS-B10U2FVG-E Service Manual
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Toshiba RAS-B10U2FVG-E Service Manual

Air- conditioners split type
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FILE NO. SVM-18048
SERVICE MANUAL
SPLIT TYPE
Indoor Unit
<Console, Heat Pump Type>
RAS-B10 U2FVG-E,-TR
RAS-B13 U2FVG-E,-TR
RAS-B18 U2FVG-E,-TR
R32
May, 2018

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Summary of Contents for Toshiba RAS-B10U2FVG-E

  • Page 1 FILE NO. SVM-18048 SERVICE MANUAL SPLIT TYPE Indoor Unit <Console, Heat Pump Type> RAS-B10 U2FVG-E,-TR RAS-B13 U2FVG-E,-TR RAS-B18 U2FVG-E,-TR May, 2018...

  • Page 2: Table Of Contents

    FILE NO. SVM-18048 CONTENTS 1. SAFETY PRECAUTIONS ................3 2. SPECIFICATIONS ..................7 3. REFRIGERANT R410A ................9 4. CONSTRUCTION VIEWS ................ 17 5. WIRING DIAGRAM .................. 18 6. SPECIFICATIONS OF ELECTRICAL PARTS ......... 19 7. REFRIGERANT CYCLE DIAGRAM ............20 8.

  • Page 3: Safety Precautions

    FILE NO. SVM-18048 1. SAFETY PRECAUTIONS SAFETY PRECAUTIONS The important contents concerned to the safety are described on the product itself and on this Service Manual. Please read this Service Manual after understanding the described items thoroughly in the following contents (Indications/Illustrated marks), and keep them.
  • Page 4 FILE NO. SVM-18048 Read the precautions in this manual This appliance is fi lled with R32. carefully before operating the unit. (Flammable Material) Information included in the Operation Service personnel should be handing this equipment Manual and/or Installation Manual. with reference to the Installation Manual. For general public use Power supply cord of outdoor unit shall be more than 1.5 mm (H07RN-F or 60245IEC66) polychloroprene...
  • Page 5 FILE NO. SVM-18048 DANGER • ASK AN AUTHORIZED DEALER OR QUALIFIED INSTALLATION PROFESSIONAL TO IN- STALL/MAINTAIN THE AIR CONDITIONER. INAPPROPRIATE SERVICING MAY RESULT IN WATER LEAKAGE, ELECTRIC SHOCK OR FIRE. • TURN OFF MAIN POWER SUPPLY BEFORE ATTEMPTING ANY ELECTRICAL WORK. MAKE SURE ALL POWER SWITCHES ARE OFF.
  • Page 6 FILE NO. SVM-18048 Do not pierce or burn as the appliance is pressurized. Do not expose the appliance to heat, fl ame, sparks, or • other sources or ignition. Else, it may explode and cause injury or death. • For R32 model, use pipes, fl are nut and tools which is specifi ed for R32 refrigerant. Using of existing (R22) piping, fl...

  • Page 7: Specifications

    (Cooling / Heating) -10-46/-15-24 -10-46/-15-24 -10-46/-15-24 Accessory Indoor unit Installation plate Wireless remote controller Batteries Toshiba New IAQ Filter Install screw Remote controller holder Pan head wood screw for Remote control holder Insulate pipe Installation manual Owner's manual Outdoor unit...
  • Page 8 FILE NO. SVM-18048 2-2. Combined multi-split outdoor unit The multi-split outdoor units, which can be combined with B**U2FVG series indoor unit are as described below: Combined outdoor unit Indoor unit model name Outdoor model name unit type B18U2FVG B13U2FVG B10U2FVG RAS-2M10U2AVG-E,-TR 2-room Multi RAS-2M14U2AVG-E,-TR...

  • Page 9: Refrigerant R410A

    FILE NO. SVM-18048 3. REFRIGERANT R32 3. If a refrigeration gas leakage occurs during This air conditioner adopts the new refrigerant HFC installation/servicing, be sure to ventilate fully. (R32) which does not damage the ozone layer. If the refrigerant gas comes into contact with fire, a The next section describes the precautions for air poisonous gas may occur.
  • Page 10 FILE NO. SVM-18048 Table 3-2-1 Thicknesses of annealed copper pipes Thickness (mm) Nominal diameter Outer diameter (mm) 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 11 FILE NO. SVM-18048 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 R32 or conven- tional flare tool. Flare processing dimensions differ according to the type of flare tool.
  • Page 12 FILE NO. SVM-18048 Table 3-2-6 Flare and flare nut dimensions for R22 Dimension (mm) Nominal Outer diameter Thickness Flare nut width diameter (mm) (mm) (mm) 6.35 9.52 13.0 13.5 12.70 16.2 16.0 12.9 15.88 19.7 19.0 16.0 19.05 23.3 24.0 19.2 Fig.
  • Page 13 FILE NO. SVM-18048 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 R32 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 14 FILE NO. SVM-18048 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 15 FILE NO. SVM-18048 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 R32 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-18048 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 17: Construction Views

    FILE NO. SVM-18048 4-1. Indoor Unit RAS-B10 U2FVG-E,-TR RAS-B13 U2FVG-E,-TR RAS-B18 U2FVG-E,-TR B10U2FVG series B18U2FVG series B13U2FVG series - 17 -...

  • Page 18: Wiring Diagram

    FILE NO. SVM-18048 5. WIRING DIAGRAM 3 2 1 Indoor Terminal Block Heat Exchanger GRN&YEL POWER SUPPLY Fan Motor Base (From outdoor unit) SHEET 1∅ 220-240~ ,50Hz GRN&YEL METAL 1∅ 220-230~ ,60Hz CN501 CN03 CN01 CN801 Stepper motor CN21 1 1 2 4 5 6 (Vertical air flow louver) CN602...

  • Page 19: Specifications Of Electrical Parts

    FILE NO. SVM-18048 6. SPECIFICATIONS OF ELECTRICAL PARTS 6-1. Indoor Unit Part s n ame Type Specif icat io ns Fan motor (for indoor) ICF-340-41-1 DC340, 41W Room temp. sensor (TA-sensor) ( - ) at 25°C Ω Heat exchanger temp. sensor (TC-sensor) 10kΩ...

  • Page 20: Refrigerant Cycle Diagram

    FILE NO. SVM-18048 7. REFRIGERANT CYCLE DIAGRAM 7-1. Refrigerant Cycle Diagram Temp. measurement INDOOR UNIT Indoor heat exchanger Pressure measurement Gauge attaching port Vacuum pump connecting port Cross flow fan Max. : *1 Min. : *1 Deoxidized copper pipe : Chargeless : *1 Deoxidized copper pipe For RAS-B10U2FVG Series...
  • Page 21 FILE NO. SVM-18048 7-2. Operation Data <Cooling> Tempeature Heat exchanger pipe Indoor fan Outdoor fan Standard Compressor Model name condition(°C) temp. mode mode pressure revolution RAS- P (MPa) (rps) Indoor Outdoor T1 (°C) T2 (°C) B10U2FVG-E,-TR 27/19 35/- B13U2FVG-E,-TR B18U2FVG-E,-TR <Heating>...

  • Page 22: Control Block Diagram

    FILE NO. SVM-18048 8. CONTROL BLOCK DIAGRAM 8-1. Indoor Unit Indoor Unit Control Unit Heat Exchanger Sensor (TCJ) M.C.U. Louver Functions Motor Heat Exchanger Sensor (TC) • Cold draft preventing Function Room Temperature Sensor (TA) • 3-minute Delay at Restart for Compressor Louver Motor Drive Control •...

  • Page 23: Operation Description

    FILE NO. SVM-18048 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 DC motor for the indoor fan to IGBT module (Compressor stop function) motor and the outdoor fan motor.
  • Page 24 FILE NO. SVM-18048 9-2. Operation Description 1. Basic operation ......................25 1. Operation control ....................25 2. Cooling/Heating operation ..................26 3. AUTO operation ......................26 4. DRY operation ......................27 2. Indoor fan motor control ..................... 28 Capacity control ......................31 Current release control ....................

  • Page 25: Operation Description 1. Basic Operation

    FILE NO. SVM-18048 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 or indoor unit display buttons as shown in the bolow.

  • Page 26: Cooling/Heating Operation

    FILE NO. SVM-18048 Operation flow and applicable data, etc. Description Item 1. Basic 2. Cooling/Heating operation operation The operations are performed in the following parts by controls according to cooling/heating conditions. 1) Receiving the operation ON signal of the remote controller, the cooling or heating operation signal starts being transferred form the indoor controller to the outdoor unit.

  • Page 27: Dry Operation

    FILE NO. SVM-18048 Operation flow and applicable data, etc. Description Item 1. Basic 4. DRY operation 1) Detects the room temperature (TA) when operation the DRY operation started. DRY operation is performed according to the difference between room temperature and the setup 2) Starts operation under conditions in the temperature as shown below.

  • Page 28: Indoor Fan Motor Control

    FILE NO. SVM-18048 Item Operation flow and applicable data, etc. Description 2. Indoor fan <In cooling operation> motor control (This operation controls the fan speed at indoor unit side.) * Symbols The indoor fan (cross flow fan) is operated by the phase- : Ultra High control induction motor.
  • Page 29 FILE NO. SVM-18048 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 FILE NO. SVM-18048 Item Operation flow and applicable data, etc. Description [In starting and in stability] In starting In stability • Until 12 minutes passed after operation start • When 12 to 25 minutes passed after operation start and room temp. is higher than (set temp. –3°C) FAN AUTO •...

  • Page 31: Capacity Control

    FILE NO. SVM-18048 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 32 FILE NO. SVM-18048 Item Operation flow and applicable data, etc. Description 6. Release protective <In cooling/dry operation> 1) When temperature of the indoor control by tempera- heat exchanger drops below 5°C, (Prevent-freezing control for indoor heat exchanger) ture of indoor heat the compressor speed is In cooling/dry operation, the sensor of indoor heat exchanger...

  • Page 33: Air Outlet Selection

    FILE NO. SVM-18048 Item Operation flow and applicable data,etc Description 1. Purpose 7. Air outlet < How to change air outlet selection > selection 1. Operate the air conditioner and select cooling or heating mode. (Air outlet selection can't be changed at standby mode.) 2.

  • Page 34: Lower Air Outlet Louver Control

    FILE NO. SVM-18048 Item Operation flow and applicable data,etc Description 7. Air outlet < How to set to change upper-flow at Bi-flow setting in selection cooling 1. Stop operation. 2. Push and hold AIR OUTLET SELECT button on the unit operation panel over 10seconds (less than 20seconds).

  • Page 35: Upper Air Outlet Louver Control

    FILE NO. SVM-18048 Item Operation flow and applicable data,etc Description 1. Description 9. Upper air Upper louver position can be arbitrarily set pu by pushing outlet louver [FIX] button of the remote control. control · Upper louver position is stored in memory by the microcomputer, and the louver returns to the stored position when the next operation is...

  • Page 36: Eco Operation

    FILE NO. SVM-18048 Item Operation flow and applicable data, etc. Description When pressing [ECO] button on the remote controller, a 10. ECO <Cooling operation> operation Economic operation is performed. 1) The control target temperature <Cooling operation> increase 0.5ºC per hour up to 2ºC This function operates the air conditioner with the difference starting from the set temperature between the set and the room temperature as shown in the...

  • Page 37: Test Operation

    FILE NO. SVM-18048 Item Operation flow and applicable data, etc. Description When keeping [OPERATION] button pressed for 1) When pressing [OPERATION] button, the 11. Test operation 10 seconds or more, the temporary [COOL] operation previous setting operation starts. is performed. 2) When keeping [OPERATION] button pressed for 3 seconds or more, Pi, Pi, Pi sound is heard and [AUTO RESTART] control is...

  • Page 38: Pulse Modulating Valve (P .M.v.) Control

    FILE NO. SVM-18048 Item Operation flow and applicable data, etc. Description 13. Pulse This function controls throttle amount of the 1) When starting the operation, move the refrigerant in the refrigerating cycle. valve once until it fits to the stopper. Modulating (Initialize) value (P.M.V.)

  • Page 39: Self-Cleaning Function

    FILE NO. SVM-18048 Item Operation flow and applicable data, etc. Description 1. Purpose 14. Self-Cleaning 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 40: Selt-Cleaning Function Release

    FILE NO. SVM-18048 Item Operation flow and applicable data, etc. Description • Self-Cleaning diagram 14. Self-Cleaning function Operation display FCU fan rpm is depend on presetting. (240RPM) Upper airoutlet OPEN OPEN (11º) CLOSE OPEN or CLOSE OPEN or CLOSE OPEN or CLOSE Lower airoutlet depend on airoutlet selection depend on airoutlet selection...

  • Page 41: Remote-A Or B Selection

    FILE NO. SVM-18048 Item Operation flow and applicable data, etc. Description To separate using of remote control for each indoor 1. Purpose 16. Remote-A or B selection unit in case of 2 air conditioner are installed nearly. This operation is to operate only one Remote Control B Setup.

  • Page 42: Quiet Mode

    FILE NO. SVM-18048 Item Operation flow and applicable data, etc. Description 17. 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 43: One-Touch Comfort

    FILE NO. SVM-18048 Item Operation flow and applicable data, etc. Description 20. One-Touch One touch comfort is the fully automated operation Operation condition for model to Europe Comfort that is set according to the preferable condition in market a region. When an indoor unit receives "One Touch Comfort Signal"...

  • Page 44: Set Temp. Correction

    FILE NO. SVM-18048 Item Operation flow and applicable data,etc Description 1. Purpose 23. Set temp. Set temp. can be corrected by changing the set temp. correction When the difference between the set correnction value. Initial setting of the set temp. correction value is 0. temperature of the remote control and the room temperature is wide due to Set temp.

  • Page 45: Outdoor Quiet Control

    FILE NO. SVM-18048 Item Operation flow and applicable data,etc Description As shown in the table, the max. revolution number of 1. Purpose 24. Outdoor compressor can be reduced. Quiet For the users who concern about As the max. number of revolution of compressor is restricted. control noise of the outdoor unit, this control the rise-up performance at the start time is weakened.
  • Page 46 FILE NO. SVM-18048 Item Operation flow and applicable data,etc Description 24. Outdoor When air conditioner is in operation before setting. Quiet < How to set Outdoor Quiet control > control 1. Push and hold OPERATION button for 20seconds. • After pushing OPERATION button, air (for only conditioner stops operation.

  • Page 47: Auto Restart Function

    FILE NO. SVM-18048 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 48: How To Cancel The Auto Restart Function

    FILE NO. SVM-18048 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 control after the main power supply is turned off. •...

  • Page 49: 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 50 FILE NO. SVM-18048 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. Note: Dry Mode fan speed is set to Auto only. 5.
  • Page 51 FILE NO. SVM-18048 10. 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 52 FILE NO. SVM-18048 16. SELF CLEANING OPERATION (COOL AND DRY OPERATION ONLY) Cleaning operation This function is used to dry the inside of the air conditioner to reduce te growth of mold, etc. indide the air conditioner. • When the unit shuts down after having operated for 10 or more minutes in the cooling or dry mode, the cleaning operation is started automatically, and the TIMER indicator on the nuit's display panel turns on.
  • Page 53 FILE NO. SVM-18048 18. TROUBLESHOOTING (CHECK POINT) The unit does not operate. Cooling or Heating is abnormally low • The power main switch is turned off. • The filters are blocked with dust. • The circuit breader is activated to cut •...
  • Page 54 FILE NO. SVM-18048 4 stages of brightness can be changed. Temperature indicator Other lamp Usual Usual Darkness Darkness Turn off Darkness Turn off Turn off 21. CHANGE AIR OUTLET GRILLE ON STABLE TIME (COOLING ONLY) On cooling operation, whichever air outlet is set, only Upper is used when the room temperature approaches the set temperature.

  • Page 55: Name And Functions Of Indications On Remote Controller

    FILE NO. SVM-18048 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 56: Indoor Unit Display & Unit Operation Panel

    FILE NO. SVM-18048 9-5. Indoor Unit Display & Unit Operation Panel This indoor unit can be operated with the unit operation panel or using remote control. Operational contents will be followed the one which was operated later. If change the set temperature with operation panel of unit, temperature indication will be changed, but the temperature display on the remote control will not change.

  • Page 57: Installation Procedure

    FILE NO. SVM-18048 10. INSTALLATION PROCEDURE 10-1. Installation Diagram of Indoor and Outdoor Units Do not allow the drain hose to get slack. Air filter Installation plate Cut the piping hole sloped slightly. 50 mm or more 50 mm or more Make sure to run the drain hose sloped downward.
  • Page 58 FILE NO. SVM-18048 10-2. Optional Parts, Accessories and Tools 10-2-1. Optional Installation Parts Part Parts name Code Q'ty Refrigerant piping Liquid side : ∅6.35 mm each Gas side : ∅9.52 mm (RAS-B10,13U2FVG Series) ∅12.70 mm (RAS-B18U2FVG Series) Pipe insulating material (polyethylene foam, 8 mm thick) Putty, PVC tapes each...
  • Page 59 FILE NO. SVM-18048 10-2-2. Accessory and installation parts Part Part Part Part name (Q’ty) Part name (Q’ty) Part name (Q’ty) Drain nipple*** x 1 Installation plate x 1 Filter* x 2 Mounting screw ∅ 4 x 25 l x 8 Cap waterproof*** x 2 Wireless remote control x 1 Flat head wood screw...
  • Page 60 FILE NO. SVM-18048 10-2-3. Installation/Servicing Tools Changes in the product and components In the case of an air conditioner using R32, 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 61 FILE NO. SVM-18048 10-3. Indoor Unit Mounting the installation plate and screw position 10-3-1. Installation Place (Unit : mm) • A place which provides the spaces around the indoor unit as shown in the diagram. • A place where there are no obstacles near the air inlet and outlet. •...
  • Page 62 FILE NO. SVM-18048 2. Put water in the drain pan and make sure that the water is drained out of 10-3-3. How to Install Indoor Unit doors. 3. When connecting extension drain hose, insulate the connecting part of 1. Remove the air inlet grille. Open the air inlet grille and remove the strap. extension drain hose with shield pipe.
  • Page 63 FILE NO. SVM-18048 Mounting directly on the floor 1) Fix the leg of indoor unit on the fl oor with 2 mounting screws. 2) Fix the upper part of indoor unit on the wall with 4 mounting screws. For prevent dewfall (Floor installation) Wall burying mode Slit...
  • Page 64 FILE NO. SVM-18048 (Side view) (Front view) 70 or more Opening for receiver 800 or more Opening for receiver 20 to 30 Partition board Partition board 50 or more 50 or more 10-4. OTHERS Unit B setup. 10-4-1. Setting of Remote Control Press and hold MODE button for more than 20 seconds.

  • Page 65: How To Diagnose The Trouble

    FILE NO. SVM-18048 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-18048 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 67 FILE NO. SVM-18048 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-18048 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 condi- tion and indicates the information of the self-diagnosis on the display of the remote controller with the check codes.
  • Page 69 FILE NO. SVM-18048 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-18048 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-18048 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-18048 Block distinction Operation of diagnosis function Action and Judgment Check Check Display flashing Block Cause of operation conditioner code code error status 1. Check installation conditions such as Outdoor P.C. Compressor drive output error. All OFF Flashes after (Relation of voltage, current error is detected packed valve opening, refrigerant...
  • Page 73 FILE NO. SVM-18048 Block distinction Operation of diagnosis function Action and Judgment Check Check Display Block Cause of operation conditioner code code flashing error status The others Compressor does not rotate. All OFF Flashes after 1. Remove connecting lead wire of the (including Because of missed wiring, error is detected...
  • Page 74 FILE NO. SVM-18048 Block distinction Operation of diagnosis function Action and Judgment Check Check Display Block Cause of operation conditioner code code flashing error status Return signal of the outdoor Indoor unit Flashes when 1. . Check power supply (Rate +10%) The others operates error is detected...
  • Page 75 FILE NO. SVM-18048 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 76 FILE NO. SVM-18048 (3) Only the indoor motor fan does not operate <Primary check> 1. Is it possible to detect the power supply voltage (AC220–240V) between on the terminal block? 2. Does the indoor fan motor operate in cooling operation? (In heating operation, the indoor fan motor does not operate for approximately 10 minutes after it is turned on, to prevent a cold air from blowing in.) Turn off power...
  • Page 77 FILE NO. SVM-18048 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 78 FILE NO. SVM-18048 (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 79 FILE NO. SVM-18048 (5) Troubleshooting for remote control <Primary check> Check that A or B selected on the main unit is matched with A or B selected on the remote control. There is no beep from the indoor unit Push the [ ] button.
  • Page 80 FILE NO. SVM-18048 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 81 FILE NO. SVM-18048 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 82 FILE NO. SVM-18048 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 (plug) between +, – terminals of the electro- lytic capacitor (500µF or 760µF)
  • Page 83 FILE NO. SVM-18048 Does outdoor fan operate normally? Turn OFF power supply. Does compresser operate normally? Remove outdoor fan connector. 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 84 FILE NO. SVM-18048 11-8. How to Check Simply the Main Parts 8-1. 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 85 FILE NO. SVM-18048 (3) Check procedures Table 11-8-1 Procedure Check points Causes Turn off the power supply breaker Check whether or not the fuse (F01) Impulse voltage was applied or the and remove the P.C. board is blown. indoor fan motor short-circuited. assembly from electronic parts base.
  • Page 86 FILE NO. SVM-18048 11-8-2. P .C . Board Layout [1] Sensor characteristic table : Discharge temp. sensor : Room temp. sensor TC and TCJ : Heat exchanger temp. sensor TA,TC,TCJ Temperature (°C) - 86 -...
  • Page 87 FILE NO. SVM-18048 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.) Heat exchanger (TCJ)sensor Temperature 10°C 20°C 25°C 30°C 40°C Sensor TA, TC,TCJ (k.

  • Page 88: How To Replace The Main Parts

    FILE NO. SVM-18048 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-18048 Part name Procedure Remarks Electrical parts 1) Remove screw for E-box cover. ② Box assembly (E-box) Tube TC sensor TCJ sensor 4) The screw for 1) Screw for E-box cover display base 3) Screw for earth-lead 2) Remove screw for drain guide. (4 pcs) 3) Remove screw for earth-lead.
  • Page 90 FILE NO. SVM-18048 Part name Procedure Remarks Electrical parts <How to arrange the lead> ② Display unit lead Box assembly Shown in the picture. (E-box) Louver motor lead Fan motor lead Earth-lead from fan motor base Damper motor lead Heat exchanger 1) Take off the pipe holder.
  • Page 91 FILE NO. SVM-18048 Part name Procedure Remarks Louver base 1) Remove screws for louver base. ⑤ Screws for louver base (2 pcs) assembly (2 pcs) 2) - ① Pull the upper part of the louver base to upward. ② ① 2) - ②...
  • Page 92 FILE NO. SVM-18048 Part name Procedure Remarks Turbo fan 1) Turn the flange nut (M10) in the ⑧ counter-clockwise direction and take it off. 2) Pull out the turbo fan from the fan motor shaft. <Attention for turbo fan assemble> The tightening torque of the flange nut is 5N·m.
  • Page 93 FILE NO. SVM-18048 Part name Procedure Remarks Fan motor 3) Remove the flange nut and turbo fan. ⑩ (refer to ⑧) 4) Remove screws for motor holder and lead cover. (refer to ⑨) - 93 -...
  • Page 94 FILE NO. SVM-18048 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 95: Exploded Views And Parts List

    43T22315 HORIZONTAL LOUVER 43T22314 BELL MOUTH ASSY 43T63333 DISPLAY BASE TERMINAL COVER ASSY 43T44632 REFRIGERANT CYCLE ASSY 43T62339 PIPE HOLDER (FOR RAS-B10U2FVG-E,-TR) 43T49340 PLATE MOUNTING 43T44633 REFRIGERANT CYCLE ASSY 43T82316 (FOR RAS-B13U2FVG-E,-TR) 43T66309 WIRELESS REMOTE CONTROLLER 43T44634 REFRIGERANT CYCLE ASSY...
  • Page 96 Location Part Description Description 43T60406 TERMINAL 3P 43T69865 PC BOARD ASSY,WRS-LED 43T50321 SENSOR;THERMOSTAT 43T6V567 PC BOARD (FOR RAS-B10U2FVG-E,-TR) 43T50332 SENSOR:HEAT EXCHANGER 43T6V568 PC BOARD (FOR RAS-B13U2FVG-E,-TR) 43T50333 SENSOR:HEAT EXCHANGER 43T6V569 PC BOARD (FOR RAS-B18U2FVG-E,-TR) 43T62003 CORD CLAMP - 96 -...
  • Page 97 144/9 MOO 5, BANGKADI INDUSTRIAL PARK, TIVANON ROAD, TAMBOL BANGKADI, AMPHUR MUANG, PATHUMTHANI 12000, THAILAND.

This manual is also suitable for:

Ras-b18u2fvg-trRas-b10u2fvg-trRas-b13u2fvg-eRas-b13u2fvg-trRas-b18u2fvg-e

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