Toshiba RAS-B24G3KVSG-E Service Manual
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Toshiba RAS-B24G3KVSG-E Service Manual

Toshiba RAS-B24G3KVSG-E Service Manual

Indoor unit, outdoor unit
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SERVICE MANUAL
Indoor Unit
RAS-B24G3KVSG-E
RAS-B24G3KVSGB-E
R32
FILE NO. SVM-24054
SPLIT TYPE
Outdoor Unit
RAS-24J2AVSG-E2
November, 2024

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Summary of Contents for Toshiba RAS-B24G3KVSG-E

  • Page 1 FILE NO. SVM-24054 SERVICE MANUAL SPLIT TYPE Indoor Unit Outdoor Unit RAS-B24G3KVSG-E RAS-24J2AVSG-E2 RAS-B24G3KVSGB-E November, 2024...

  • Page 2: Table Of Contents

    CONTENTS 1. SAFETY PRECAUTIONS ................3 2. SPECIFICATIONS ..................7 3. REFRIGERANT R32 ..................9 4. CONSTRUCTION VIEWS ................17 5. WIRING DIAGRAM ..................19 6. SPECIFICATIONS OF ELECTRICAL PARTS ..........20 7. REFRIGERANT CYCLE DIAGRAM ............. 21 8. CONTROL BLOCK DIAGRAM ..............23 9.

  • Page 3: Safety Precautions

    1. SAFETY PRECAUTIONS 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. Warning Indications on the Air Conditioner Unit Warning indication Description...

  • Page 4: New Refrigerant Air Conditioner Installation

    CAUTION New Refrigerant Air Conditioner Installation • THIS AIR CONDITIONER ADOPTS THE NEW HFC REFRIGERANT (R32) WHICH DOES NOT DESTROY OZONE LAYER. R32 refrigerant is apt to be affected by impurities such as water, oxidizing membrane, and oils because the working pressure of R32 refrigerant is approx.
  • Page 5 WARNING • Never modify this unit by removing any of the safety guards or bypassing any of the safety interlock switches. • Do not install in a place which cannot bear the weight of the unit. Personal injury and property damage can result if the unit falls.

  • Page 6: For Reference

    CAUTION • Exposure of unit to water or other moisture before installation may result in an electrical short. Do not store in a wet basement or expose to rain or water. • Do not install in a place that can increase the vibration of the unit. Do not install in a place that can amplify the noise level of the unit or where noise or discharged air might disturb neighbors.

  • Page 7: Specifications

    Outdoor (Cooling / Heating) Installation plate Accessory Indoor unit Wireless remote controller Batteries Remote controller holder Toshiba Ultra pure filter Mounting screw 6(  4x25L) Remote controller holder 2(  3.1x16L) Flat head wood screw Installation manual Owner's manual * The specification may be subject to change without notice for purpose of improvement.

  • Page 8: Operation Characteristic Curve

    2-2. Operation Characteristic Curve <Cooling> <Heating> Conditions Conditions Indoor : DB 27 C/WB 19 Indoor : DB 20 C/WB 15 Outdoor : DB 35 C/WB 24 Outdoor : DB 7 C/WB 6 Indoor Air Flow : High Indoor Air Flow : High Pipe Length : 7.5 m Pipe Length : 7.5 m Voltage : 230V/ 50Hz...

  • Page 9: Refrigerant R32

    3. REFRIGERANT R32 3. If a refrigeration gas leakage occurs during This air conditioner adopts the new refrigerant HFC (R32) which does not damage the ozone layer. installation/servicing, be sure to ventilate fully. If the refrigerant gas comes into contact with fire, a The next section describes the precautions for air conditioner using the new refrigerant.

  • Page 10: Processing Of Piping Materials

    Table 3-2-1 Thicknesses of annealed copper pipes Thickness (mm) Nominal diameter Outer diameter (mm) R32(R410A) 6.35 0.80 0.80 9.52 0.80 0.80 12.70 0.80 0.80 15.88 1.00 1.00 2. Joints For copper pipes, flare joints or socket joints are used. Prior to use, be sure to remove all contaminants. a) Flare Joints Flare joints used to connect the copper pipes cannot be used for pipings whose outer diameter exceeds 20 mm.
  • Page 11 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 Table 3-2-6 Flare and flare nut dimensions for R22 Dimension (mm) Nominal Outer diameter Thickness Flare nut width diameter (mm) (mm) (mm) 6.35 9.52 13.0 13.5 12.70 16.2 16.0 12.9 15.88 19.7 19.0 16.0 19.05 23.3 24.0 19.2 Fig. 3-2-2 Relations between flare nut and flare seal surface 2.

  • Page 13: Required Tools

    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: Recharging Of Refrigerant

    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: Brazing Of Pipes

    3-5. Brazing of Pipes 3. Types of flux 3-5-1. Materials for Brazing • Noncorrosive flux 1. Silver brazing filler Generally, it is a compound of borax and boric Silver brazing filler is an alloy mainly composed acid. of silver and copper. It is used to join iron, copper It is effective in case where the brazing tem- or copper alloy, and is relatively expensive though perature is higher than 800°C.
  • Page 16 3-5-3. Brazing As brazing work requires sophisticated techniques, experiences based upon a theoretical knowledge, it must be performed by a person qualified. Flow meter In order to prevent the oxide film from occurring in the pipe interior during brazing, it is effective to Stop valve proceed with brazing while letting dry Nitrogen gas (N2) flow.

  • Page 17: Construction Views

    4. CONSTRUCTION VIEWS 4-1. Indoor Unit 1053 Wireless adapter Air Inlet Front Panel Grille Inlet Air Filter Heat Exchanger Air Outlet Knock Out System Knock Out System 71.5 50 Wireless remote controller 71.5 (Flare 12.70) For stud bold ( 6) For stud bold ( 8~ Hanger Outline of indoor unit...

  • Page 18: Installation Dimension

    4-2. Outdoor Unit (Unit : mm) 6 hole R5.5 A detail drawing (Back leg) 6 hole 2- 11x14 Hole 11x14 hole Drain outlet (For 8- 10 anchor bolt) B detail drawing (Front leg) FAN-GUARD COVER-PV ViewZ Electrical part Liquid side (Flare 6.35) Gas side...

  • Page 19: Wiring Diagram

    5. WIRING DIAGRAM CN102 CN01 DRM3 (BLK) (WHI) DRM2 DRM1 5 or 6 MCC- 1653 DRC P.C. Board CN105 CN100 (WHI) (WHI) CN101 CN65 P200 (YEL) (RED) 1 2 3 4 5 6 P201 CN74 CN72 CN70 (WHI) (YEL) (WHI) P202 Compressor Outdoor Control P.C.

  • Page 20: Specifications Of Electrical Parts

    6. SPECIFICATIONS OF ELECTRICAL PARTS 6-1. Indoor Unit Parts name Type name Specifications ICF-340-30-6 DC340V, 42W Fan Motor Room temp. sensor (TA-sensor) 10kΩ at 25°C Heat exchanger temp. sensor (TC-sensor) 10kΩ at 25°C Heat exchanger temp. sensor (TCJ-sensor) 10kΩ at 25°C Louver motor 24BYJ48-ST, MSBPC20F04 Output (Rated) 4 phase, DC12V...

  • Page 21: Refrigerant Cycle Diagram

    7. REFRIGERANT CYCLE DIAGRAM 7-1. Refrigerant Cycle Diagram Temp. measurement INDOOR UNIT Indoor heat exchanger Cross flow fan Max. : 25m Min. : 2m Pressure measurement Chargeless : 15m Deoxidized copper pipe Gauge attaching port Outer dia. : 6.35mm Vacuum pump connecting port Thickness : 0.8mm Sectional shape Deoxidized copper pipe...

  • Page 22: Operation Data

    7-2. Operation Data <Cooling> Temperature Model name Standard Heat exchanger Indoor Outdoor Compressor Connecting condition(°C) pipe temp. RAS- pressure fan mode fan mode revolution piping Indoor Outdoor P (MPa) T1 (°C) T2 (°C) (rps) 27/19 35/24 B24G3KVSG-E High High 1.0 to 1.1 11 to 13 49 to 52 B24G3KVSGB-E <Heating>...

  • Page 23: Control Block Diagram

    8. CONTROL BLOCK DIAGRAM 8-1. Indoor Unit Indoor Unit Control Panel M.C.U Operation Display Functions Heat Exchanger Sensor • Louver Control Timer • 3-minute Delay at Restart for Compressor Display Temperature Sensor Hi-POWER • Motor Revolution Control Display • Processing Infrared Rays Signal Receiver (Temperature Processing) Display...

  • Page 24: Outdoor Unit (Inverter Assembly)

    8-2. Outdoor Unit (Inverter Assembly) - 24 -...

  • Page 25: Operation Description

    9. OPERATION DESCRIPTION 9-1. Outline of Air Conditioner Control • Detection of inverter input current and current release operation This air conditioner is a capacity-variable type air conditioner. Its system can control the speed of • Over-current detection and prevention operation to compressor motor according to load.
  • Page 26 9-2. Operation Description 1. Basic operation ..........................27 1. Operation control ........................27 2. Cooling/Heating operation ....................... 27 3. AUTO operation ........................29 4. DRY operation ......................... 29 2. Indoor fan motor control ........................ 30 3. Outdoor fan motor control ......................32 4.

  • Page 27: Basic Operation

    Item Operation flow and applicable data, etc. Description 1. Basic 1. Operation control operation Receiving the user’s operation condition setup, the operation statuses of indoor/outdoor units are controlled. 1) The operation conditions are selected by the remote controller as shown in the below. 2) A signal is sent by ON button of the remote controller.

  • Page 28: Cooling/Heating Operation

    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 29: Auto Operation

    Item Operation flow and applicable data, etc. Description 1) Detects the room temperature (Ta) when 1. Basic 3. AUTO operation operation the operation started. Selection of operation mode 2) Selects an operation mode from Ta in As shown in the following figure, the operation starts by selecting automatically the status of room temperature the left figure.

  • Page 30: Fan Speed

    *5 : Fan speed = (M + –L) x 1/4 + L +1.0 +0.5 (Linear approximation L(W7) from M+ and L) (Table 1) Indoor fan air flow rate Fan speed Mode RAS-B24G3KVSG-E, RAS-B24G3KVSGB-E level Cooling Heating Cool Heat Fan speed Air flow rate Fan speed...
  • Page 31 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 32: Outdoor Fan Motor Control

    Item Operation flow and applicable data, etc. Description 3. Outdoor fan The blowing air volume at the outdoor unit side is controlled. 1) The operation command sent motor control from the remote controller is Receiving the operation command from the controller of processed by the indoor unit indoor unit, the controller of outdoor unit controls fan speed.

  • Page 33: Capacity Control

    Item Operation flow and applicable data, etc. Description 4. 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 34: Release Protective Control By Temperature Of Indoor Heat Exchanger

    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 reduced.

  • Page 35: Defrost Control (Only In Heating Operation)

    Item Operation flow and applicable data, etc. Description 7. Defrost control (This function removes frost adhered to the outdoor The necessity of defrost operation is (Only in heating heat exchanger.) detected by the outdoor heat exchanger operation) temperature. The conditions to detect the The temperature sensor of the outdoor heat ex- necessity of defrost operation differ in A, changer (Te sensor) judges the frosting status of the...

  • Page 36: Louver Control

    Item Operation flow and applicable data, etc. Description 8. Louver control This function controls the air direction of the indoor unit. 1) Louver • The position is automatically controlled according to the operation position mode (COOL/HEAT). • The set louver position is stored in memory by the microcomputer, and the louver returns to the stored position when the next operation is performed.

  • Page 37: Heating Operation

    Item Operation flow and applicable data, etc. Description 8. Louver control Louver position in heating operation Heating operation/ AUTO (HEAT) Initial setting of “Heating storage position” Louver : Directs downward (79.1°) Wide air direction Wide-angle Right wide Left wide Spot air direction Spot front Spot right Spot left...

  • Page 38: Louver Control

    Item Operation flow and applicable data, etc. Description 8. Louver control 2) Wind direction adjustment Air direction • The Up-Down louver position can be Horizontal Inclined Blowing Inclined Horizontal arbitrarily set up by blowing blowing downward blowing blowing pressing [FIX ] button.

  • Page 39: Swing

    Item Operation flow and applicable data, etc. Description 8. Louver control 3) Swing • Swing operation is perfor in range 35° with the Fixed position as Swing • the center. When pressing [SWING] button during • If the swing range exceeded either upper or lower limit position, operation, the louver swing operation is perfomed in range 35°...

  • Page 40: Temporary Operation

    Item Operation flow and applicable data, etc. Description 1) When pressing [RESET] button, the 9. Temporary Pressing [RESET] button starts the temporary temporary [AUTO] operation starts. operation operation of [AUTO] operation. When keeping [RESET] button pressed for 10 seconds or more, the 2) When keeping [RESET] button pressed temporary [COOL] operation is performed.

  • Page 41: Pulse Motor Valve (P.m.v.) Control

    Item Operation flow and applicable data, etc. Description This function controls throttle amount of the 1) When starting the operation, move the 12. Pulse Motor valve refrigerant in the refrigerating cycle. valve once until it fits to the stopper. (Initialize) (P.M.V.) According to operating status of the air conditioner, control...

  • Page 42: Self-Cleaning Function

    Item Operation flow and applicable data, etc. Description 13. 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 43 Item Operation flow and applicable data, etc. Description 13. Self-Cleaning function 13-1-1. Self-Cleaning diagram 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. depend on presetting of timer function.

  • Page 44: Remote-A Or B Selection

    Item Operation flow and applicable data, etc. Description 1. Purpose 14. Remote-A or B Setting the remote controller selection This operation is to operate only one To separate using of remote control for each indoor indoor unit using one remote controller. unit in case of 2 air conditioner are installed nearly.

  • Page 45: Quiet Mode

    Item Operation flow and applicable data, etc. Description 16. QUIET The "Quiet mode" selected from [ FAN ] button; Quiet mode is the system which, control the Mode revolving speed of indoor fan to work - The fan of the indoor unit will be restricted the constantly at lower than speed L.

  • Page 46: Power Selection Mode

    Item Operation flow and applicable data,etc Description 18. POWER To automatically control room temperature to 1. Purpose Selection save energy (except in DRY and FAN ONLY The function is used when its circuit Mode mode) breaker is shared with other electrical −...

  • Page 47: Fireplace Operation

    Item Operation flow and applicable data,etc Description Fireplace 1: Keep air circulation during other heat 20. Fireplace Operation Cancel cold draft prevention control and fan source applied. Note: speed depend on user require base on basic control. With Fireplace operation on heating Fireplace 2: mode indoor unit always runs and cold Cold draft prevention control is active with...

  • Page 48: Operation Mode Selectable

    Item Operation flow and applicable data, etc. Description 1. Purpose Operating system setting 22. Operation mode Choosing the operating system as setectable appropriate in real condition Operation Factory default setting prefer "Heat pump" system. Through it is able to cooling only system heating only system or return to factory default.

  • Page 49: Auto Restart Function

    9-3. Auto Restart Function This indoor unit is equipped with an automatic restarting function which allows the unit to restart operating with the set operating conditions in the event of a power supply being accidentally shut down. The operation will resume without warning three minutes after power is restored. This function is set to work when shipped from the factory.

  • Page 50: How To Set The Auto Restart Function

    9-3-2. How to Set the Auto Restart Function To set the auto restart function, proceed as follows: The power supply to the unit must be on ; the function will not set if the power is off. Press the [RESET] button located in the center of the front panel continuously for three seconds. The unit receives the signal and beeps three times.

  • Page 51: Remote Controller And Its Functions

    9-4. Remote controller and Its Functions 9-4-1. Parts Name of Remote Controller 1 Infrared signal emitter 2 Start/Stop button 3 Mode select button 4 Temperature button 5 Fan speed button 6 Menu select button 7 Set louver Up-Down button 8 Set louver Left-Right button 9 Check button* *Check button under battery cover MODE...

  • Page 52: Menu Setup

    Louver Swing and HADA Care Flow Operation Setting 5. MENU SETUP For select more setting of Air conditioner such as Louver select 1. Press MENU button for enter menu selection Hi Power, OFF Timer and other use MENU button. MENU During triangle mark blink can select menu by press TEMP. button. 2. Enter Louver set by press MENU button again. triangle mark will stop blink and setting feature will be blink instead. Blink 3. Select Louver swing or HADA CARE FLOW by press TEMP. button. Vertical Swing MODE (Up-Down)

  • Page 53: Hi Power Operation

    Hi-P SILENT OPERATION (Outdoor Unit) Hi POWER OPERATION To automatically control room temperature and airflow for faster cooling or Keep outdoor unit operating silently to ensure either yourself or neighborhood heating operation (except in DRY and FAN ONLY mode) will have a tight sleep in nighttime. By this feature, the heating capacity will be optimized to deliver such silent experience.

  • Page 54: Fireplace Operation

    FIREPLACE OPERATION TIMER OFF OPERATION Keep indoor unit’s fan blowing continuously during thermo off, to circulate To set the timer OFF when the air conditioner is operating. heat from other sources over the room. There are three setting parameters: 1. Press MENU button for enter menu setting and press TEMP. button to Default setting >...

  • Page 55: Power-Selection Operation

    6. MANUAL DEFORST OPERATION POWER-SELECTION OPERATION To defrosting the heat exchanger of the outdoor unit during Heating operation This function is used when the circuit breaker is shared with other electrical Press and hold : for 5 seconds , then remote control display will appliances.

  • Page 56: Wireless Lan Connection

    Android : Version 5.0 or later. About Toshiba Home AC Control 1. Toshiba Home AC Control can control AC operation by Smartphone or tablet (mobile device) via internet connection. 2. Everywhere control, control software run on Cloud system and mobile device can set and monitor AC operation via internet connection.
  • Page 57 Open application and select Log in. Enter user name and Login successful. password. Add Wireless adapter for control by Toshiba Home AC Control application. Wireless adapter Built-in Active Wireless adapter by remote controller and Auto login. Select “Add AC (Adapter)” from both display above.
  • Page 58 Add Wireless adapter for control by Toshiba Home AC Control application. AC (adapter) connect Active Wireless adapter by Remote controller Press and hold MODE button 5 seconds Wireless LED mark will blink when AP mode active MODE MENU WPS mode...
  • Page 59 Toshiba Home AC Control application Home screen Weekly schedule Setting Menu Add AC Sub menu all AC All AC On/Off  Add Group  Delete Group Group AC On/Off  Operation Setting Each AC On/Off Sub menu all AC  Select AC ...
  • Page 60 Mode and Condition setting. Enter operation mode of All AC Enter operation mode of Group AC Enter operation mode of each AC Mode select for Toshiba Home AC Control application. Provide for 5 operation modes Auto Cool Heat Fan only...
  • Page 61 Setting in operation mode. Tab for select AC Weekly schedule OFF-ON timer set 0.5-12hrs. Mode select OFF-ON Timer set Temperature set Indoor temperature Outdoor temperature ON timer set from Off mode only Fan speed set Louver set Special feature Off mode - 61 -...
  • Page 62 Group operation. Maximum 3 groups 1 Group maximum = 16 units. Add group Add AC in group Delete AC in group Please make sure Factory Reset is performed before deleting AC from mobile application. (See owner manual ʺPress and hold MODE button on remote control for 5 second and active dL functionʺ) - 62 -...
  • Page 63 Weekly schedule set. Day select Monday - Sunday Weekly schedule of all AC unit Weekly schedule of all AC unit Time select Weekly schedule set for each unit Mode select Select program for active by tick at select box Weekly schedule cancel. Weekly schedule not set Weekly schedule...
  • Page 64 Energy monitoring Select Room for Energy monitoring Select Energy monitoring Energy monitoring display Set cost calculate and currency Select Energy monitoring display Export data and send by Email ● The power consumption displayed is just an estimate as it is calculated simply. It may sometimes differ from the result measured by the power meter.
  • Page 65 In case of have some problem can check from Help menu. Note : ‘‘ The Wireless Adapter must be installed, maintained, repaired and removed by a qualified installer or qualified service person.” ‘‘Contact dealer and/or service center when equipment is malfunction.” - 65 -...

  • Page 66: Name And Functions Of Indications On Remote Controller

    9-4-3. Name and Functions of Indications on Remote Controller [Display] All indications, except for the clock time indicator, are displayed by pressing the button. Transmission mark Hi-POWER indicator Indicates when the Hi-POWER operation starts. This transmission mark indicates when the remote controller transmits signals to the indoor unit.

  • Page 67: Installation Procedure

    10. INSTALLATION PROCEDURE 10-1. Installation Diagram of Indoor and Outdoor Units For the rear left, bottom left and left piping Wall Hook Installation plate Cut out a piece of SPACER from indoor unit packaging box, roll it and insert between the indoor unit and wall to tilt the indoor unit for better operation.

  • Page 68: Optional Installation Parts

    10-2. Installation 10-2-1. Optional installation parts Part Parts name Q’ty code Refrigerant piping Liquid side : Ø6.35 mm each Gas side : Ø12.70 mm Pipe insulating material (polyethylene foam, 8 mm thick) Putty, PVC tapes each <Fixing bolt arrangement of outdoor unit> 125 mm 29 mm Air inlet...

  • Page 69: Accessory And Installation Parts

    Installation plate × 1 Wireless remote controller × 1 Battery × 2 Remote controller holder × 1 Toshiba Ultra pure fi lter × 2 Mounting screw × 6 Flat head wood screw × 2 Owner’s Manual × 1 Installation Manual × 1 Screw ×...
  • Page 70 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 71: Indoor Unit

    10-3. Indoor Unit 10-3-2. Cutting a hole and mounting installation 10-3-1. Installation place <Cutting a hole> • A place which provides the spaces around the indoor When installing the refrigerant pipes from the rear. unit as shown in the diagram •...

  • Page 72: Piping And Drain Hose Installation

    10-3-3. Piping and drain hose installation CAUTION <Piping and Drain Hose Forming> • If have curtain rails, window cornice or other * Since dewing results in a machine trouble, make objects, allow space from the indoor unit should be sure to insulate both the connecting pipes. (Use 55 mm or more.
  • Page 73 <Left-hand connection with piping> <How to fix the Drain Cap> 1) Insert hexagon wrench (4 mm) in a center head. Bend the connecting pipe so that it is laid within 43 mm above the wall surface. If the connecting pipe is laid exceeding 43 mm above the wall surface, the indoor unit may unstably be set on the wall.

  • Page 74: Indoor Unit Fixing

    10-3-4. Indoor unit fixing 10-3-5. Drainage 1. Pass the pipe through the hole in the wall, and hook 1. Run the drain hose sloped downwards. the indoor unit on the installation plate at the upper hooks. NOTE 2. Swing the indoor unit to right and left to confirm that •...

  • Page 75: Outdoor Unit

    10-4. Outdoor Unit 10-4-2. Precautions about installation in Regions with Snowfall and Cold Temperatures 10-4-1. Installation place • Do not use the supplied drain nipple for draining • A place which provides the spaces around the water. Drain the water from all the drain holes directly. outdoor unit as shown in the diagram •...

  • Page 76: Draining The Water

    Draining the Water 10-4-3. Refrigerant piping connection • Holes are provided on the base plate of the outdoor <Flaring> unit to ensure that the defrost water produced during 1. Cut the pipe with a pipe cutter. heating operations is drained off eff ciently. If a centralized drain is required when installing the unit on a balcony or wall, follow the steps below to drain off the water.

  • Page 77: Air Purge

    <Tightening connection> Evacuating Align the centers of the connecting pipes and tighten After the piping has been connected to the indoor unit, the flare nut as far as possible with your fingers . Then you can perform the air purge together at once. tighten the nut with a spanner and torque wrench as shown in the figure.

  • Page 78: Vacuum Pump

    <Pump down process> Compound pressure gauge Pressure gauge –101 kPa (–76 cmHg) Manifold valve 1. Turn off the Air Conditioner system. 2. Connect the charge hose from the manifold valve to the Handle High Handle Low service port of the packed valve at gas side. (Keep full closed) 3.

  • Page 79: Electrical Works

    10-5. Electrical works The power supply can be selected to connect to indoor unit or outdoor unit. Choose proper way and connect the power supply and connecting cable by follow the instruction as following. RAS-B24G3KVSG-E Model RAS-B24G3KVSGB-E Power source 50Hz, 220 – 240V Single phase Maximum running current 12.50 A...
  • Page 80 10-5-2. Power Supply and Connecting Cable Connection In Case of Indoor Unit Connect With 1:1 Outdoor Unit Power Supply Input at Outdoor Unit Terminal Block (Recommend) Indoor Unit Connecting cable Stripping length of the Connecting cable connect to connecting cable Terminal block Earth line 50 mm...
  • Page 81 10-5-3. Power supply input Wiring Diagram for 1:1 Outdoor Unit Power supply input at Outdoor Terminal Block (Recommend) Indoor Chassis Terminal Block Chassis Outdoor Terminal Block Power supply input Power supply input at Indoor Terminal Block (Optional) Indoor Chassis Terminal Block Power supply input Chassis...
  • Page 82 10-5-4. In Case of Indoor Unit Connect With Inverter Multi System (IMS) Power Supply Input at Outdoor Unit Terminal Block Indoor Unit Outdoor Unit Connecting cable Stripping length of the 1(L) 2 3 Connecting cable connect to connecting cable Terminal block Earth line 50 mm 10 mm...
  • Page 83 4. Press [MODE] during pushing [CHECK]. “B” 10-6. Others will show on the display and “00” will disappear and 10-6-1 . Gas leak test the air conditioner will turn OFF. The Remote Controller B is memorized (Picture 2). Check places for indoor unit (Flarenut connection) Note : 1.
  • Page 84 10-6-5. Auto Restart Function Setting This product is designed so that, after a power failure, it can restart automatically in the same operating mode as before the power failure. Information The product is shipped with Auto Restart function in the ON position.

  • Page 85: How To Diagnose The Trouble

    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 86 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 87 K Precautions when inspecting the control section of the outdoor unit NOTE : A large-capacity electrolytic capacitor is used in the outdoor unit controller (inverter). Therefore, if the power supply is turned off, charge (charging voltage DC280 to 380V) remains and discharging takes a lot of time. After turning off the power source, if touching the charging section before discharging, an electrical shock may be caused.

  • Page 88: First Confirmation

    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 89: Primary Judgment

    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 90: Self-Diagnosis By Remote Controller (Check Code)

    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 in formation of the self-diagnosis on the display of the remote controller with the check codes.
  • Page 91 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 92 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 93 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 94 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 board...
  • Page 95 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 compressor, and operate again.
  • Page 96 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 unit has been sent when...

  • Page 97: Judgment Of Trouble By Every Symptom

    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 98 (2) Power is not turned on though Indoor P.C. board is replaced <Confirmation procedure> Turn on power supply. Return the wiring of the power relay is returned to Is it wired as shown in Figure below? Does operation lamp flash? the normal procedure.
  • Page 99 (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 supply once, and...
  • Page 100 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 fan bearing normal...
  • Page 101 (4) Indoor fan motor automatically starts to rotate by turning on power supply [For DC fan motor] <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 102: Temporary Auto

    (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. There is no beep from the indoor unit Push the [ ] button. The OPERATION lamp of the air conditioner main unit does not light Does the transmission...
  • Page 103 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 following diagram.
  • Page 104 11-6. How to Check Simple the Main Parts <Check procedure> Gas leakage, Discharge temp. error, disconnection of TS/TC gas leakage sensors (Check code 02, 1C) (Check code 03, 1E) Does this model have P.M.V. or not? Valve drive check Is coil of the pulse motor valve Set it correctly.
  • Page 105 11-7. How to Diagnose Trouble in Outdoor Unit 11-7-1. Summarized Inner Diagnosis of Inverter Assembly Table 11-7-1 Diagnosis/Process flowchart Item Contents Summary Preparation Turn “OFF” the power supply breaker, and remove 3P Remove connector connector which connects of compressor. inverter and compressor. Check •...

  • Page 106: How To Check Simply The Main Parts

    Diagnosis/Process flowchart Item Contents Summary Check Check winding resistance between phases of compres- sor, and resistance between outdoor frames by using a tester. → OK if 20MΩ or more • Is it grounded? Replace control board assembly. • Is it short-circuit ...

  • Page 107: Check Procedures

    (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 or (F02) is blown. indoor fan motor short-circuited. assembly from electronic parts base.

  • Page 108: Board Layout

    11-8-2. P .C . Board Layout CN21 CN36 CN32 Main Electrolyte Fan Motor Stepping motor HA1 Connector Fuse Capacitor (Wireless Adapter) Connector DB01 Diode Bridge Rectifier CN30 Power supply Input terminal (Line) Fuse CN10 Display R-03 Connector Resistor L-01 Line Filter CN31 CN63(Red) Power supply...
  • Page 109 11-8-3. Indoor Unit (Other Parts) Part name Checking procedure Room temp. (TA) sensor Heat Disconnect the connector and measure the resistance value with tester. exchanger (TC) sensor Heat (Normal temp.) exchanger (TCJ) sensor Temperature 10°C 2 ° 0 C 2 ° 5 C 3 °...

  • Page 110: Checking Procedure

    11-8-5. Checking Method for Each Part Part name Checking procedure Electrolytic capacitor 1. Turn OFF the power supply breaker. 2. Discharge all three capacitors completely. 3. Check that safety valve at the bottom of capacitor is not broken. 4. Check that vessel is not swollen or exploded. 5.

  • Page 111: How To Simply Judge Whether Outdoor Fan Motor Is Good Or Bad

    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 112: How To Replace The Main Parts

    12. HOW TO REPLACE THE MAIN PARTS WARNING • Since high voltages pass through the electrical parts, turn off the power without fail before proceeding with the repairs. Electric shocks may occur if the power plug is not disconnected. • After the repairs have been completed (after the front panel and cabinet have been installed), perform a test run, and check for smoking, unusual sounds and other abnormalities.
  • Page 113 Part name Procedures Remarks Air filters 1) Follow to the procedure in the item 1 . Air filters 2) Remove the left and the right air filters from the front panel. Wireless adapter 1) Follow procedures item 2) Remove screw holding the wireless adapter 3) Disconnect the connector for the wireless adapter Wireless adapter...
  • Page 114 Part name Procedures Remarks Electric part 1) Follow the procedure item 3 . box assembly 2) Remove screw holding the electric part cover. TA sensor Connectors Fan motor connector (DC) Earth line TCJ sensor Louver motor connector TC sensor Screw Electric part cover Louver motor (L) connector (blue)
  • Page 115 Part name Procedures Remarks Fan motor 1) Follow the procedure item 3 and 4 . Cross flow fan 2) Loosen the set screw of the cross flow fan. Cross flow fan Body back 3.5 mm Set screw Fan motor Vertical louver Hexagon screw driver 3) Remove 2 fixing screws of the motor band.

  • Page 116: Drain Pan Assembly

    Part name Procedures Remarks 1) Follow the procedure item Drain pan 2) Remove screw holding the electric part assembly cover. 3) Disconnect the louver motor connector (5P) from P.C. board assembly. 4) Disconnect the cord motor of Louver VT (5P) from the Louver VT (L/R) connector.
  • Page 117 Part name Procedures Remarks Vertical louver 1) Follow the procedure item 3 and 8 . Vertical louver assembly 2) Remove 2 fixing screws from the base Screw vertical louver then remove the vertical louver assembly from the body back. Screw Cover motor VT 1) Follow the procedure item 3 , 8 and 9 .
  • Page 118 Part name Remarks Procedures Cross flow fan Body back 3.5 mm Fan motor Set screw - Holding the set screw, install the cross flow fan so that flat area on shaft of the fan motor comes to the mounting hole of the set screw.
  • Page 119 Microcomputer Part name Procedure Remarks Common procedure 1) Turn the power supply off to stop the Replace terminal block,  operation of air-conditioner. microcomputer ass’y and the P .C. board ass’y. 2) Remove the front panel. • Remove the 2 fixing screws. 3) Remove the electrical part base.
  • Page 120 12-2. Outdoor Unit Part name Procedure Remarks Common 1. Detachment  procedure Upper cabinet NOTE Wear gloves for this job. Otherwise, you may injure your hands on the parts, etc. Waterproof 1) Stop operation of the air conditioner, cover and turn off the main switch of the breaker for air conditioner.
  • Page 121 Part name Procedure Remarks 1. Detachment Front cabinet ‚ 1) Perform step 1 in  2) Remove the fixing screws (ST2TØ4 × 10L 2 pcs.) used to secure the front cabinet and inverter cover, the screws (ST2TØ4 × 10L 4 pcs.) used to secure the front cabinet at the bottom, and the fixing screws (ST2TØ4 ×...
  • Page 122 Part name Procedure Remarks Inverter 1) Perform work of item 1 in  ƒ assembly 2) Remove screw (ST2TØ4 × 10L 2 pcs.) of the upper part of the front cabinet. • If removing the inverter cover in this condition, P .C. board can be checked. •...
  • Page 123 Part name Procedures Remarks Control board assembly 1. Disconnect the leads and connectors connected CN83 CN63 CN60 CN51 CN71 CN72 CN74 CN73 to the other parts from the control board assembly. CN65 CN62 CN64 CN61 CN50 1) Leads CN30 • 3 leads (black, white, orange) connected to terminal block.
  • Page 124 Part name Procedure Remarks 1. Side cabinet (right) Side cabinet … 1) Perform step 1 in and all the steps in ‚ ƒ 2) Remove the fixing screw (ST2TØ4 × 10L 3 pcs.) used for securing the side cabinet to the bottom plate and valve fixing panel.
  • Page 125 Part name Procedure Remarks Compressor 1) Perform work of item 1 of  ‚ ƒ „ ‡ … 2) Extract refrigerant gas. 3) Remove the partition board. (ST2TØ4 × 10L 4 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 126 Part name Procedure Remarks Fan guard 1. Detachment ‰ 1) Perform work of item 1 of ‚ 2) Remove the front cabinet, and put it down Minus screwdriver so that fan guard side directs downward. Hooking claw Perform work on a corrugated cardboard, cloth, etc.

  • Page 127: Exploded Views And Parts List

    ELECTRICAL PARTS ASSEMBLY Location Part Location Part Description Description 43T00779 FRONT PANEL ASSY 43T21496 MOTOR FAN (FOR RAS-B24G3KVSG-E) 43T20357 CROSS FLOW FAN ASSY 43T00923 FRONT PANEL BLACK ASSY 43T39385 BASE BEARING (FOR RAS-B24G3KVSGB-E) 43T22312 BEARING ASSY, MOLD 43T00715 CAP SCREW...
  • Page 128 13-2. Indoor Unit (Part-E) Location Part tion Part Description Description 43T50414 TC-SENSOR 43TN9904 PC BOARD ASSY : WRS-LED 43T6V673 TERMINAL(5P-TF) 43TN9863 PC BOARD ASSY(WP-048) 43T60604 SENSOR-TA(SEMITEC) 43T60502 HOUSING-WiFi 43T62340 CORD-CLAMP 43T60605 TEMPERATURE SENSOR - 128 -...
  • Page 129 13-3. Outdoor Unit 37,41 36,40 Location Part Location Part Description Description 43T42383 BASE PLATE ASSEMBLY 43T47405 BONNET, 12.7 DIA 43T00560 LEFT CABINET 43T46435 VALVE; PACKED 6.35 DIA 43T00719 RIGHT SIDE CABINET ASSEMBLY 43T46507 VALVE; PACKED 12.7 DIA 43T00561 UPPER CABINET 43T46469 BODY PMV 43T00774...
  • Page 130 13-4. Outdoor Unit (Part-E) Details for fixing ASM­DYNA Stopped point for assembly ASM­DYNA PC PLATE BASE ASM­DYNA lead (Connect to CN90 on PC BOARD) ASM­DYNA PC BOARD TO­SENSOR Fixing ASM­DYNA by sliding with under PC PLATE BASE TE­SENSOR TS­SENSOR HEATSINK TD­SENSOR 710  HOLDER SENSOR PC PLATE BASE 711  HOLDER SENSOR 712  HOLDER SENSOR Location Part Location Part Description Description 43T67310 HEATSINK 43T50352 TEMPERATURE SENSOR 43TNV607 PC BOARD (WP-528) 43T62313 PC PLATE BASE 43T60392...
  • Page 131 CARRIER AIR CONDITIONING (THAILAND) CO., LTD. 144/9 MOO 5, BANGKADI INDUSTRIAL PARK, TIVANON ROAD, TAMBOL BANGKADI, AMPHUR MUANGPATHUMTHANI, PATHUMTHANI 12000, THAILAND...

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