Toshiba RAS-25PKVSG-ND Service Manual
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Toshiba RAS-25PKVSG-ND Service Manual

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SERVICE MANUAL
Indoor Unit
RAS-25PKVSG-ND
RAS-35PKVSG-ND
R32
FILE NO. SVM-17057-9
SPLIT TYPE
Outdoor Unit
RAS-25PAVSG-ND
RAS-35PAVSG-ND
Revised on September, 2019

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Summary of Contents for Toshiba RAS-25PKVSG-ND

  • Page 1 FILE NO. SVM-17057-9 SERVICE MANUAL SPLIT TYPE Indoor Unit Outdoor Unit RAS-25PKVSG-ND RAS-25PAVSG-ND RAS-35PKVSG-ND RAS-35PAVSG-ND Revised on September, 2019...

  • Page 2: Table Of Contents

    FILE NO. SVM-17057 CONTENTS 1. SAFETY PRECAUTIONS ................3 2. SPECIFICATIONS ..................6 3. REFRIGERANT R32 ...................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-17057 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.
  • Page 4 FILE NO. SVM-17057 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 5 FILE NO. SVM-17057 • For R32 model, use pipes, flare nut and tools which is specified for R32 refrigerant. Using of existing (R22) piping, flare nut and tools may cause abnormally high pressure in the refrigerant cycle (piping), and possibly result in explosion and injury.

  • Page 6: Specifications

    (Cooling / Heating) -15,46/-25,24 Installation plate Accessory Indoor unit Wireless remote controller Batteries Remote controller holder Toshiba IAQ 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 7 FILE NO. SVM-17057 2-2. Operation Characteristic Curve <Cooling> <Heating> RAS-35PKVSG-ND RAS-35PKVSG-ND RAS-25PKVSG-ND RAS-25PKVSG-ND Conditions Conditions Indoor : DB 27 C/WB 19 Indoor : DB 20 C/WB 15 Outdoor : DB 7 C/WB 6 Outdoor : DB 35 C/WB 24 Indoor Air Flow : High...

  • Page 8: Refrigerant R32

    FILE NO. SVM-17057 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 9 FILE NO. SVM-17057 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 10 FILE NO. SVM-17057 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 11 FILE NO. SVM-17057 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 12 FILE NO. SVM-17057 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 13 FILE NO. SVM-17057 3-4. Recharging of Refrigerant When it is necessary to recharge refrigerant, charge the specified amount of new refrigerant according to the following steps. Recover the refrigerant, and check no refrigerant remains in the equipment. When the compound gauge’s pointer has indicated –0.1 Mpa (–76 cmHg), place the handle Low in the fully closed position, and turn off the vacuum pump’s power switch.
  • Page 14 FILE NO. SVM-17057 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. 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-17057 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

    FILE NO. SVM-17057 4. CONSTRUCTION VIEWS 4-1. Indoor Unit Air Inlet Air Filter Front Panel Grille Inlet " " " " Back Body Hert Exchanger Air Outlet Knock Out System Knock Out System 66.5 55 66.5 Installation plate hanger Wireless remote controller 17.5 Remote controller holder Drain hose (0.5m)
  • Page 17 FILE NO. SVM-17057 4-2. Outdoor Unit (Unit : mm) Ø6 hole R5.5 Ø6 hole Ø11x14 hole A detail Drawing (Back leg) 2- 11 x 14 Hole Ø 25 Drain outlet Ø B Detail Drawing (Front leg) (For 10 anchor bolt) Ø8 - Ø...

  • Page 18: Wiring Diagram

    FILE NO. SVM-17057 5. WIRING DIAGRAM RAS-25PKVSG-ND / RAS-25PAVSG-ND POWER INPUT WIRING DIAGRAM Power input at Indoor Terminal Block(Recomend) Indoor Terminal Block Power Outdoor input Terminal Block Power input at Outdoor Terminal Block(Option) Indoor Terminal Block Outdoor Terminal Block Color Indication...
  • Page 19 FILE NO. SVM-17057 RAS-35PKVSG-ND / RAS-35PAVSG-ND POWER INPUT WIRING DIAGRAM Power input at Indoor Terminal Block(Recomend) Indoor Terminal Block Power Outdoor input Terminal Block Power input at Outdoor Terminal Block(Option) Indoor Terminal Block Outdoor Terminal Block Color Indication BLK : BLACK WHI : WHITE Power input GYL : GREEN &...

  • Page 20: Specifications Of Electrical Parts

    FILE NO. SVM-17057 6. SPECIFICATIONS OF ELECTRICAL PARTS 6-1. Indoor Unit Parts name Type Specificat Fan Motor (for indoor) RAS-25PKVSG-ND SJM-240-35 AC 220-240V, 35W RAS-35PKVSG-ND ICF-340U30-2 DC340V, 30W Room temp. sensor (TA-sensor) 10kΩ at 25°C Heat exchanger temp. sensor (TC-sensor) 10kΩ...

  • Page 21: Refrigerant Cycle Diagram

    FILE NO. SVM-17057-8 7. REFRIGERANT CYCLE DIAGRAM 7-1. Refrigerant Cycle Diagram RAS-25PKVSG-ND / RAS-25PAVSG-ND RAS-35PKVSG-ND / RAS-35PAVSG-ND Temp. measurement INDOOR UNIT Indoor heat exchanger Cross flow fan Max. : 20m Min. : 2m Pressure measurement Chargeless : 15m Deoxidized copper pipe...
  • Page 22 FILE NO. SVM-17057 7-2. Operation Data <Cooling> Tempeature Heat exchanger Model name Standard Indoor Outdoor Compressor condition(°C) RAS- pressure pipe temp. fan mode fan mode revolution Indoor Outdoor P (MPa) T1 (°C) T2 (°C) (rps) 27/19 35/- High 14 to 15 41 to 42 High 25PKVSG-ND...

  • Page 23: Control Block Diagram

    FILE NO. SVM-17057 8. CONTROL BLOCK DIAGRAM 8-1. Indoor Unit M.C.U. Indoor Unit Control Unit Functions Louver · Motor Cold draft preventing Function Heat Exchanger Sensor (TC) · 3-minute Delay at Restart for Compressor Room Temperature Sensor (TA) Louver Motor ·...
  • Page 24 FILE NO. SVM-17057 8-2. Outdoor Unit (Inverter Assembly) - 24 -...

  • Page 25: Operation Description

    FILE NO. SVM-17057 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 FILE NO. SVM-17057 9-2. Operation Description 1. Basic operation ......................27 1. Operation control ....................27 2. Cooling/Heating operation ..................28 3. AUTO operation ..................... 28 4. DRY operation ......................28 2. Indoor fan motor control ..................... 29 3. Outdoor fan motor control ................... 31 4.

  • Page 27: Basic Operation

    FILE NO. SVM-17057 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

    FILE NO. SVM-17057 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: Indoor Fan Motor Control

    *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-25PKVSG-ND RAS-35PKVSG-ND level Cooling Heating Cooling Heating Cool Heat...
  • Page 30 FILE NO. SVM-17057 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 31: Outdoor Fan Motor Control

    FILE NO. SVM-17057 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 32: Capacity Control

    FILE NO. SVM-17057 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 33: Release Protective Control By Temperature Of Indoor Heat Exchanger

    FILE NO. SVM-17057 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 34: Defrost Control (Only In Heating Operation)

    FILE NO. SVM-17057 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 (TE) and outdoor air The temperature sensor of the outdoor heat temperature (TO).

  • Page 35: Louver Control

    FILE NO. SVM-17057 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 36: Eco Operation

    * 10 (DRY max - COOL min) /6 x 3 + COOL min * 9 (DRY max - COOL min) /6 x 2 + COOL min * 8 (DRY max - COOL min) /6 x 1 + COOL min RAS-25PKVSG-ND RAS-35PKVSG-ND Cool min (Hz) DRY max (Hz) <Heating operation>...

  • Page 37: Temporary Operation

    FILE NO. SVM-17057 Item Operation flow and applicable data, etc. Description 10. Temporary Pressing [RESET] button starts the temporary opera- 1) When pressing [RESET] button, the operation tion of [AUTO] operation. When keeping [RESET] temporary [AUTO] operation starts. button pressed for 10 seconds or more, the temporary 2) When keeping [RESET] button pressed [COOL] operation is performed.

  • Page 38: High Pressure Control

    FILE NO. SVM-17057 Item Operation flow and applicable data, etc. Description 12. High pressure control 1. Purpose This function detects error on the refrigerating cycle or error on the com- Cooling Heating pressor, and performs protective control. Control operation (TE) (TC) 2.

  • Page 39: Self-Cleaning Function

    FILE NO. SVM-17057 Item Operation flow and applicable data, etc. Description 14. 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 40 FILE NO. SVM-17057 Item Operation flow and applicable data, etc. Description 14. Self-Cleaning function 14-1-1. 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.

  • Page 41: Remote-A Or B Selection

    FILE NO. SVM-17057 Item Operation flow and applicable data, etc. Description 15. 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 indoor unit using one remote controller. unit in case of 2 air conditioner are installed nearly.

  • Page 42: Quiet Mode

    Remarks : 1. Quiet mode is unable to work in dry mode. Model RAS-25PKVSG-ND RAS-35PKVSG-ND 2. Quiet mode is appropriate to work with less Cool/Heat min (Hz) cooling load and less heating load condition.

  • Page 43: Defrost Control (Only In Heating Operation)

    FILE NO. SVM-17057 Item Operation flow and applicable data, etc. Description • Strong defrost 20. Defrost control <Finish of defrost operation for strong Upgrade defrost ability when normal defrost ability (Only in heating defrost> is not enough by increase defrosting finished operation) •...

  • Page 44: Short Timer

    FILE NO. SVM-17057 Item Operation flow and applicable data, etc. Description Purpose 21. Short Timer In the normal condition, after switching one circuit To start the unit immediately for the purpose of breaker, 3-minute delay time for compressor and testing, trial...etc, short timer can be used. 1 hour for plasma air purifier are set for the maintenance of the unit.

  • Page 45: Silent Operation

    FILE NO. SVM-17057 Item Operation flow and applicable data,etc Description 23. Silent Silent button on remote controller is pressed. This function is used when the user need Operation Silent 1: to keep silent at outdoor side. It is limit Cooling/heating capacity is limited maximum maximum compressor speed and CDU for 70% of rated.

  • Page 46: Outdoor Quiet Control

    As the maximum number of revolution of the compressor is restricted, the rise- up performance at the start time is weakened. <Maximum number of revolution of compressor at normal time and Quiet control time> RAS-25PKVSG-ND RAS-35PAVSG-ND Outside temp. Normal time Quiet controlled...

  • Page 47: Fireplace Operation

    FILE NO. SVM-17057 Item Operation flow and applicable data,etc Description Fireplace button on remote controller is pressed. Keep air circulation during other heat 26. Fireplace Operation Fireplace 1: source applied. Cancel cold draft prevention control and fan Note: speed depend on user require base on basic With Fireplace operation on heating control.

  • Page 48: Auto Restart Function

    FILE NO. SVM-17057 9-3. Auto Restart Function (Default setting from factory is ON). 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 49: How To Cancel The Au To Restar T Function

    FILE NO. SVM-17057 9-3-2. How to Set the Auto Restart Function To set Auto Restart Function, proceed as follows: 1. The power supply to the unit must be ON ; The function will not set or reset if the power supply is OFF. 2.

  • Page 50: Remote Control

    FILE NO. SVM-17057 9-4. Remote control 4-1. Remote control and its functions I nfrared signal emitter Memory and preset button (PRESET) Start/Stop button Temperature up/down button (TEMP.) Mode select button (MODE) Swing louver button (SWING) Fan speed button (FAN) Set louver button for vertical direction (FIX ) 8 degree celcius operation and fireplace function button Economy button (ECO) High power button (Hi-POWER)
  • Page 51 FILE NO. SVM-17057 How to set WEEKLY TIMER Press to enter WEEKLY TIMER setting. Blink Press to select desired day in sequence. The sequence of day symbol appears on the LCD WEEKLY SUMO TUWETHFRSA (All day) Press to select the program number. l The program 1 is ready for setting while is pressed PG-1 appears on the LCD.
  • Page 52 FILE NO. SVM-17057 Press to select desired operation. Press to select desired temperature. l The temperature can be set between 17°C and 30°C. Press to select the desired fan speed. Add operations, if required. Press to use 8°C operation. (Notes: Fireplace cannot select and memorize in weekly function) l Press to use ECO operation...
  • Page 53 FILE NO. SVM-17057 Edit Weekly timer program Page 18 , follow steps 1 - 3 below. To edit the program after confirming the weekly timer setting on Press l The day of the week and the program number of the current day will be displayed. Press to select the day of the week and press to select...
  • Page 54 FILE NO. SVM-17057 To delete programs The individual program Press l The day of the week and the program number is displayed. l Select the day to delete the program. Press to select the program number to be deleted. Press l ON or OFF timer will be cleared and the LCD will blink.
  • Page 55 FILE NO. SVM-17057 2. AUTOMATIC OPERATION To automatically select cooling, heating, or fan only operation. Press Press : Select Press Press : Select the desired temperature 3. Press Press : Select AUTO, LOW , LOW+ , MED , MED+ , HIGH or Quiet 3.
  • Page 56 FILE NO. SVM-17057 8. AIR VOLUME, AIR DIRECTION AND SWING LOUVERS · Changing the air volume, press FAN button · Changing the air direction, press FIX button When changing the air to the vertical direction, release the left side at the desired position. at the lower limit).
  • Page 57 FILE NO. SVM-17057 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 ho ld for 3 seconds to memorize the setting. The mark displays.

  • Page 58: Name And Functions Of Indications On Remote Controller

    FILE NO. SVM-17057 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 weekly timer indicator This transmission mark indicates when the The time setting for timer operation and weekly remote controller transmits signals to the indoor timer function is indicated.

  • Page 59: Installation Procedure

    FILE NO. SVM-17057 10. INSTALLATION PROCEDURE 10-1. Installation Diagram of Indoor and Outdoor Units For the rear left and left piping Wall Hook Installation plate Insert the cushion between the indoor unit and wall, and tilt the indoor unit for better operation.
  • Page 60 FILE NO. SVM-17057 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 : Ø9.52 mm Pipe insulating material (polyethylene foam, 6 mm thick) Putty, PVC tapes each <Fixing bolt arrangement of outdoor unit> 108 mm 125 mm 28 mm...
  • Page 61 FILE NO. SVM-17057 10-2-2. Accessory and installation parts Indoor Unit Part name Part name Wireless remote control × 1 Installation Plate × 1 Battery × 2 Remote control holder × 1 Mounting screw × 6 Flat head wood screw × 2 Owner’s Manual ×...
  • Page 62 FILE NO. SVM-17057 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 63 FILE NO. SVM-17057 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 When installing the refrigerant pipes from the rear. indoor unit as shown in the diagram •...
  • Page 64 FILE NO. SVM-17057 <When the installation plate is directly mounted on the wall> 1. Securely fit the installation plate onto the wall by screwing it in the upper and lower parts to hook up the indoor unit. 2. To mount the installation plate on a concrete wall with anchor bolts, utilize the anchor bolt holes as illustrated in the above figure.
  • Page 65 FILE NO. SVM-17057 10-3-3. Piping and drain hose installation <How to fix the Drain Cap> 1) Insert hexagon wrench (4 mm) in a center head. <Piping and Drain Hose Forming> * Since dewing results in a machine trouble, make sure to insulate both the connecting pipes. (Use polyethylene foam as insulating material.) Rear right Rear left...
  • Page 66 FILE NO. SVM-17057-6 NOTE <In case of bottom right or bottom left piping> If the pipe is bent incorrectly, the indoor unit may • After scribing slits of the back body with a knife or unstably be set on the wall. a making-off pin, cut them with a pair of nippers or After passing the connecting pipe through the pipe an equivalent tool.
  • Page 67 FILE NO. SVM-17057-6 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.
  • Page 68 FILE NO. SVM-17057 10-4. Outdoor Unit Precautions for adding refrigerant 10-4-1. Installation Place • Use a scale having a precision with at least 10 g per index line when adding the refrigerant. • A place which provides enough space around the outdoor unit as shown in the diagram.
  • Page 69 FILE NO. SVM-17057 10-4-3. Draining the Water 10-4-4. Refrigerant Piping Connection • Holes are provided on the base plate of the Flaring outdoor unit to ensure that the defrost water produced during heating operations is drained off 1. Cut the pipe with a pipe cutter. efficiently.
  • Page 70 FILE NO. SVM-17057 10-4-5. Evacuating Tightening Connection After the piping has been connected to the indoor Align the centers of the connecting pipes and tighten unit, perform the air purge. the flare nut as much as possible with your fingers. Then tighten the nut with a wrench and torque AIR PURGE wrench as shown in the figure.
  • Page 71 FILE NO. SVM-17057 CAUTION • KEEP IMPORTANT 5 POINTS FOR PIPING WORK (1) Take away dust and moisture (Inside of the connecting pipes.) (2) Tight the connection (between pipes and unit) (3) Evacuate the air in the connecting pipes using a VACUUM PUMP.
  • Page 72 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. Model RAS-25PKVSG-ND RAS-35PKVSG-ND Power source 50Hz, 220 – 240 V Single phase Maximum running current 9.10A...
  • Page 73 FILE NO. SVM-17057 10-5-2. Power Supply and Connecting Cable Connection Power Supply Input at Indoor Unit Terminal Block (Recommend) Indoor Unit Outdoor Unit Stripping length of the power Power supply cable Power supply cable Connecting cable connect to connect to L N supply cable terminal block (1, 2, 3, Terminal block (L N 1 2 3)
  • Page 74 FILE NO. SVM-17057 10-5-3. Power supply input wiring diagram Power supply input at Indoor unit Terminal Block (Recommend) Indoor Terminal Block Power supply input Outdoor Terminal Block Power supply input at Outdoor unit Terminal Block (Optional) Indoor Terminal Block Outdoor Terminal Block Power supply input...
  • Page 75 FILE NO. SVM-17057 10-6. Others NOTE : 1. Repeat above step to reset Remote 10-6-1 . Gas leak test Control to be A. 2. Remote Control A has not "A" display. 3. Default setting of Remote Control from Check places for indoor unit (Flarenut factory is A.

  • Page 76: How To Diagnose The Trouble

    FILE NO. SVM-17057 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 77 FILE NO. SVM-17057 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 78 FILE NO. SVM-17057 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 79 FILE NO. SVM-17057 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 80 FILE NO. SVM-17057 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 81 FILE NO. SVM-17057 11-4. Self-Diagnosis by Remote Controller (Check Code) 1. If the lamps are indicated as shown B to E in Table 11-4-1, 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 82 FILE NO. SVM-17057 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 83 FILE NO. SVM-17057 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 84 FILE NO. SVM-17057 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 85 FILE NO. SVM-17057 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 8 times*.
  • Page 86 FILE NO. SVM-17057 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 87 FILE NO. SVM-17057 Block distinction Operation of diagnosis function Action and Judgment Check Check Display Block Cause of operation conditioner code code flashing error status The others Return signal of the outdoor Indoor unit Flashes when 1. . Check power supply (Rate +10%) operates error is detected (including...
  • Page 88 FILE NO. SVM-17057 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 89 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. To the paragraph of "No Power turns on". (RAS-25PKVSG-ND) WP-039 (RAS-35PKVSG-ND) CN28 WP-038 - 89 -...
  • Page 90 FILE NO. SVM-17057 (3) Only the indoor motor fan does not operate <Primary check> (For RAS-25PKVSG-ND / RAS-25PAVSG-ND) 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.)
  • Page 91 FILE NO. SVM-17057 (3) Only the indoor motor fan does not operate <Primary check> (For RAS-35PKVSG-ND / RAS-35PAVSG-ND) 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 92 FILE NO. SVM-17057 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 93 FILE NO. SVM-17057-1 (For AC fan motor) <Inspection procedure> (For RAS-25PKVSG-ND / RAS-25PAVSG-ND) 1. Remove the front panel. (Remove 2 screws.) 2. Remove the cover of the fan motor lead wires. 3. Check AC voltage with CN10 connector while the fan motor is rotating.
  • Page 94 FILE NO. SVM-17057 (4) Indoor fan motor automatically starts to rotate by turning on power supply [For DC fan motor] (For RAS-35PKVSG-ND / RAS-35PAVSG-ND) <Cause> The IC is built in the indoor fan motor. Therefore the P.C. board is also mounted to inside of the motor. If the P.C.
  • Page 95 FILE NO. SVM-17057 (4) 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.
  • Page 96 FILE NO. SVM-17057 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 97 FILE NO. SVM-17057 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) Valve drive check Is coil of the pulse motor valve Set it correctly.
  • Page 98 FILE NO. SVM-17057 11-7. How to Diagnose Trouble in Outdoor Unit 11-7-1. Summarized Inner Diagnosis of Inverter Assembly 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.
  • Page 99 FILE NO. SVM-17057 Diagnosis/Process flowchart Item Contents Summary Check Check winding resistance between phases of compres- sor, and resistance between outdoor frames by using a tester. • Is not grounded. → OK if 20MΩ or more Replace control board assembly. ...
  • Page 100 FILE NO. SVM-17057 (3) Check procedures (RAS-25PKVSG-ND / RAS-25PAVSG-ND) 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.
  • Page 101 FILE NO. SVM-17057 (3) Check procedures (RAS-35PKVSG-ND / RAS-35PAVSG-ND) 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.
  • Page 102 FILE NO. SVM-17057 11-8-2. P .C . Board Layout (RAS-25PKVSG-ND) +12V (RAS-35PKVSG-ND) +12V - 102 -...
  • Page 103 FILE NO. SVM-17057 [1] Sensor characteristic table TD : Discharge temp. sensor TA : Room temp. sensor TC : Heat exchanger temp. sensor TO : Outdoor temp. sensor TS : Suction temp. sensor TA, TC, TO, TS, TE : Outdoor heat exchanger temp sensor Temperature (°C) - 103 -...
  • Page 104 FILE NO. SVM-17057 11-8-3. Indoor Unit (Other Parts) Part name Checking procedure Room temp. (TA) sensor Disconnect the connector and measure the resistance value with tester. Heat exchanger (TC) sensor (Normal temp.) Temperature 10°C 20°C 25°C 30°C 40°C Sensor TA, TC (kΩ) 20.7 12.6 10.0...
  • Page 105 FILE NO. SVM-17057 11-8-5. Checking Method for Each Part Part name Checking procedure Electrolytic capacitor 1. Turn OFF the power supply breaker. (For raising pressure, smoothing) 2. Discharge all three capacitors completely. 3. Check that safety valve at the bottom of capacitor is not broken. 4.
  • Page 106 FILE NO. SVM-17057 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 107 FILE NO. SVM-17057 11-10.How to setting the CLEAN OPERATION cancel 11-10-1. Self-Cleaning • Self-Cleaning diagram function Operation display FCU fan rpm is depend on presetting. (500RPM) FCU louver OPEN OPEN (12.7º) CLOSE ON or OFF ON or OFF Timer display depend on presetting of timer function.

  • Page 108: How To Replace The Main Parts

    FILE NO. SVM-17057 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 109 FILE NO. SVM-17057 Part name Procedures Remarks Front panel 1) Stop operation of the air conditioner and turn off its main power supply. Front panel Air inlet grille 2) Open two screw caps and securely remove screws (2 pcs.) at the front panel. Hooks of front panel Screw...
  • Page 110 FILE NO. SVM-17057 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 Vertical louver Set screw Fan motor Hexagon screw driver...
  • Page 111 FILE NO. SVM-17057 Part name Procedures Remarks Drain pan 1) Follow the procedure item 3 . assembly 2) Remove screw holding the electric part cover. Connectors P.C.board Screw Electric part cover Louver motor connector 3) Disconnect the louver motor connector (5P) from P.C.
  • Page 112 FILE NO. SVM-17057 Part name Procedures Remarks Vertical louver 1) Follow the procedure item 3 and 7 . assembly 2) Remove 2 fixing screws from the base vertical Vertical louver louver then remove the vertical louver assembly from the body back. Screw Screw Cross flow fan...
  • Page 113 FILE NO. SVM-17057 Part name Remarks Procedures Heat exchanger 1) Follow the procedure in item 3 and 4 . (Evaporator) 2) Remove 2 fixing screws at the left side of the heat exchanger. Screws 3) Remove fixing screw at the upper right side of the heat exchanger.
  • Page 114 FILE NO. SVM-17057 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 115 FILE NO. SVM-17057 12-2. Outdoor unit Remarks Part name Procedures Common procedure 1. Detachment NOTE Upper cabinet Wear gloves for this job. Otherwise, you may injure your hands on the parts, etc. 1) Stop operation of the air conditioner, and Waterproof cover turn off the main switch of the breaker for air conditioner.
  • Page 116 FILE NO. SVM-17057 Remarks Part name Procedures Front cabinet 1. Detachment 1) Perform step 1 in 1. 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 117 FILE NO. SVM-17057 Part name Procedures Remarks Inverter assembly 1) Perform work of item 1 in 1. Inverter cover 2) Remove screw (ST2TØ4 × 10L 2 pcs.) of the upper part of the front cabinet. P.C. board • If removing the inverter cover in this (Soldered surface) condition, P.C.
  • Page 118 FILE NO. SVM-17057 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 terminal block. • Lead connected to compressor : Disconnect the connector (3P).
  • Page 119 FILE NO. SVM-17057 Part name Procedures Remarks Side cabinet 1. Side cabinet (right) 1) Perform step 1 in 2 and all the steps in 3. 2) Remove the fixing screw (ST2TØ4 × 10L 4 pcs.) used for securing the side cabinet to the bottom plate and valve fixing panel.
  • Page 120 FILE NO. SVM-17057 Part name Procedures Remarks Compressor 1) Perform work of item 1 of 1 and 2, 3, 4, 5. 2) Extract refrigerant gas. 3) Remove the partition board. (ST2TØ4 × 10L 3 pcs.) 4) Remove the sound-insulation material. 5) Remove terminal cover of the compressor, and disconnect lead wire of the compressor from Compressor...
  • Page 121 FILE NO. SVM-17057 Part name Procedures Remarks Electronic expansion 1. Detachment valve coil 1) Perform step 1 in 2, all the steps in 3 and 1 in 5. 2) Remove the coil by pulling it up from the electronic control valve body. 2.
  • Page 122 FILE NO. SVM-17057 Part name Procedure Remarks TE sensor (Outdoor heat exchanging temperature sensor) • Attachment With the leads pointing downward and the sensor leads pointing in the direction shown in the figure, install the sensor onto the straight pipe part of the condenser output pipe.
  • Page 123 FILE NO. SVM-17057 Sensor Temperature replacement method Part name Procedures Remarks Replacement of 1) Cut the sensor 100 mm longer than old temperature sensor one. Cutting here Thermal for servicing only Connector sensor part 2) Cut the protective tube after pulling out it (200 mm).

  • Page 124: Exploded Views And Parts List

    MOTOR BAND BACK 43T09537 GRILLE OF AIR INLET ASSY (For RAS-35PKVSG-ND) AIR FILTER 43T80349 43T39367 MOTOR BAND FRONT 43T03398 BACK BODY ASSY (For RAS-25PKVSG-ND) 43T22343 VERTICAL LOUVER ASSY 43T39369 MOTOR BAND FRONT 43T72337 DRAIN PAN ASSY (For RAS-35PKVSG-ND) 43T22345 HORIZONTAL LOUVER...
  • Page 125 FILE NO. SVM-17057-4 13-2. Indoor Unit (Part-E) Location Part Location Part Description Description 43T69319 TEMPERATURE SENSOR 43T6W576 PC BOARD 43T6V673 TERMINAL(5P-TF) (For RAS-35PKVSG-ND) 43T6V674 TEMPERATURE SENSOR 43T6W594 PC BOARD 43T62340 CORD-CLAMP (For RAS-25PKVSG-ND) 43T6V950 PC BOARD ASS:WRS-LED 43T60480 HOUSING-WiFi - 125 -...
  • Page 126 FILE NO. SVM-17057-9 13-3. Outdoor Unit 37, 41 36, 40 63 HOLDER SENSOR (TE) ; FOR PIPE OD 6.35 mm. 64 HOLDER SENSOR (TD) ; FOR PIPE OD 8.00 mm. 65 HOLDER SENSOR (TS) ; FOR PIPE OD 9.52 mm. Location Part Location...
  • Page 127 FILE NO. SVM-17057-2 13-5. Outdoor Unit (Part-E) TE Sensor (Ø6) TO Sensor (Ø6) TS Sensor (Ø6) TD Sensor (Ø4) Location Part Location Part Description Description 43T62351 HEATSINK 43T60326 FUSE 43T6W423 PC BOARD 43T50369 TEMPERATURE SENSOR (For RAS-25PAVSG-ND) 43T50336 TEMPERATURE SENSOR 43T6W424 PC BOARD 43T50370...
  • Page 128 144/9 MOO 5, BANGKADI INDUSTRIAL PARK, TIVANON ROAD, TAMBOL BANGKADI, AMPHUR MUANG, PATHUMTHANI 12000, THAILAND.

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