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Toshiba RAS-22N3KV2-A Service Manual

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FILE NO. SVM-13003

SERVICE MANUAL

SPLIT TYPE
Indoor Unit
Outdoor Unit
<High Wall, Heat Pump Type>
<Heat Pump Type>
RAS-22N3KV2-A
RAS-22N3AV2-A
R410A
January, 2013

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Summary of Contents for Toshiba RAS-22N3KV2-A

  • Page 1: Service Manual

    FILE NO. SVM-13003 SERVICE MANUAL SPLIT TYPE Indoor Unit Outdoor Unit <High Wall, Heat Pump Type> <Heat Pump Type> RAS-22N3KV2-A RAS-22N3AV2-A R410A January, 2013...

  • Page 2: Table Of Contents

    FILE NO. SVM-13003 CONTENTS 1. SAFETY PRECAUTIONS ................2 2. SPECIFICATIONS ..................5 3. REFRIGERANT R410A ................7 4. CONSTRUCTION VIEWS ................ 15 5. WIRING DIAGRAM .................. 17 6. SPECIFICATIONS OF ELECTRICAL PARTS ......... 18 7. REFRIGERANT CYCLE DIAGRAM ............19 8.

  • Page 3: Safety Precautions

    FILE NO. SVM-13003 1. SAFETY PRECAUTIONS Installing, staring up, and servicing air-conditioning equipment can be hazardous due to system pressures, electrical components, and equipment location (roofs, elevated structures, etc.). Only trained, qualified installers and service mechanics should install, start-up, and service this equipment. Untrained personnel can perform basic maintenance functions such as cleaning coils.
  • Page 4 FILE NO. SVM-13003 DANGER FOR USE BY QUALIFIED PERSONS ONLY. • • TURN OFF MAIN POWER SUPPLY BEFORE.ATTEMPTING ANY ELECTRICAL WORK. MAKE SURE ALL POWER SWITCHES ARE OFF. FAILURE TO DO SO MAY CAUSE ELECTRIC SHOCK. • CONNECT THE CONNECTING CABLE CORRECTLY. IF THE CONNECTING CABLE IS CONNECTED WRONGLY, ELECTRIC PARTS MAY BE DAMAGED.
  • Page 5 FILE NO. SVM-13003 CAUTION CAUTION • Exposure of unit to water or other moisture before installation could result in electric shock. Do not store it in a wet basement or expose to rain or water. • After unpacking the unit, examine it carefully for possible damage. Report any damages to your distributor. Do not install in a place that can increase the vibration of the unit.

  • Page 6: Specifications

    –10 ~ 46 –15 ~ 24 Installation plate Wireless remote controller Batteries Remote controller holder Toshiba New IAQ filter (long) Mounting screw Indoor unit 6 (Ø4 × 25L) Accessory Remote controller holder 2 (Ø3.1 × 16L) , 1(∅3.1 x 25L)

  • Page 7: Operation Characteristic Curve

    FILE NO. SVM-13003 2-2. Operation Characteristic Curve <Cooling> <Heating> Conditions Conditions Indoor : DB 27 C/WB 19 Indoor : DB 20 Outdoor : DB 35 Outdoor : DB 7 C/WB 6 Air Flow : High Air Flow : High Pipe Length : 7.5m Pipe Length : 7.5m Voltage : 240V Voltage : 240V...

  • Page 8: Refrigerant R410A

    FILE NO. SVM-13003 3. REFRIGERANT R410A This air conditioner adopts the new refrigerant HFC 6. When an air conditioning system charged with a (R410A) which does not damage the ozone layer. large volume of refrigerant is installed in a small room, it is necessary to exercise care so that, The working pressure of the new refrigerant R410A even when refrigerant leaks, its concentration...
  • Page 9 FILE NO. SVM-13003 Table 3-2-1 Thicknesses of annealed copper pipes Thickness (mm) Nominal diameter (in.) Outer diameter (mm) R410A 6.35 0.80 0.80 9.52 0.80 0.80 12.70 0.80 0.80 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-13003 d) Flare Processing Make certain that a clamp bar and copper pipe have been cleaned. ØD By means of the clamp bar, perform the flare processing correctly. Use either a flare tool for R410A or conven- tional flare tool. Flare processing dimensions differ according to the type of flare tool.
  • Page 11 FILE NO. SVM-13003 Table 3-2-6 Flare and flare nut dimensions for R22 Dimension (mm) Nominal Outer diameter Thickness Flare nut width diameter (in.) (mm) (mm) (mm) 6.35 9.52 13.0 13.5 12.70 16.0 16.2 12.9 Fig. 3-2-2 Relations between flare nut and flare seal surface 2.

  • Page 12: Specifications

    FILE NO. SVM-13003 3-3. Tools 3-3-1. Required Tools The service port diameter of packed valve of the outdoor unit in the air-water heat pump using R410A is changed to prevent mixing of other refrigerant. To reinforce the pressure-resisting strength, flare processing dimensions and opposite side dimension of flare nut (For Ø12.7 copper pipe) of the refrigerant piping are lengthened.

  • Page 13: Recharging Of Refrigerant

    FILE NO. SVM-13003 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-13003 1. Be sure to make setting so that liquid can be charged. 2. When using a cylinder equipped with a siphon, liquid can be charged without turning it upside down. It is necessary for charging refrigerant under condition of liquid because R410A is mixed type of refrigerant. Accordingly, when charging refrigerant from the refrigerant cylinder to the equipment, charge it turning the cylinder upside down if cylinder is not equipped with siphon.
  • Page 15 FILE NO. SVM-13003 3-5-3. Brazing 2. Characteristics required for flux • Activated temperature of flux coincides with As brazing work requires sophisticated techniques, the brazing temperature. experiences based upon a theoretical knowledge, it must be performed by a person qualified. •...

  • Page 16: Construction Views

    FILE NO. SVM-13003 4. CONSTRUCTION VIEWS 4-1. Indoor Unit Heat exchanger Grille Inlet Air Inlet Air filter 1050 Front Panel Air outlet Knock out system Knock out system Wireless remote controller 17.5 Remote controller holder Drain hose (0.5m) Hanger Hanger Connecting pipe (0.39m) Connecting pipe (0.49m) 12.70)
  • Page 17 FILE NO. SVM-13003 4-2. Outdoor Unit 6 hole R5.5 A detail drawing (Back leg) 6 hole 11x14 hole 25 Drain outlet 11x14 Hole (For 10 anchor bolt) B detail drawing (Front leg) FAN-GUARD COVER-PV View Z Electrical part Liquid side (Flare 6.35) Gas side...

  • Page 18: Wiring Diagram

    FILE NO. SVM-13003 5. WIRING DIAGRAM 5-1. Indoor Unit / Outdoor Unit Compressor Q200 ~ 205 Q300 ~ 305 IGBT MOS-FET CN300 Fan Motor R221 R321 R220 R320 CN700 R219 R319 Pulse Motor Valve CN603 P . C. Board (TS) MCC-5009 Suction pipe Temp.

  • Page 19: Specifications Of Electrical Parts

    FILE NO. SVM-13003 6. SPECIFICATIONS OF ELECTRICAL PARTS 6-1. Indoor Unit Type Specifications Parts name Fan motor (for indoor) ICF-340-30-2Β DC340V, 30W Room temp. sensor (TA-sensor) ( — ) 10kΩ at 25°C Heat exchanger temp. sensor (TC-sensor) ( — ) 10kΩ...

  • Page 20: Refrigerant Cycle Diagram

    FILE NO. SVM-13003 7. REFRIGERANT CYCLE DIAGRAM 7-1. Refrigerant Cycle Diagram T1 Temp. measurement INDOOR UNIT Indoor heat exchanger Cross flow fan Max. : 20m Min. : 2m Chargeless : 15m Pressure measurement Deoxidized copper pipe Charge : 20g/m Gauge attaching port Outer dia.

  • Page 21: Operation Data

    FILE NO. SVM-13003 7-2. Operation Data <Cooling> Tempeature Standard Heat exchanger Indoor Outdoor Compressor condition(°C) pressure pipe temp. fan mode fan mode revolution Indoor Outdoor P (MPa) T1 (°C) T2 (°C) (rps) 27/19 35/24 0.9 to 1.1 11 to 13 41 to 43 High High...

  • Page 22: Control Block Diagram

    FILE NO. SVM-13003 8. CONTROL BLOCK DIAGRAM 8-1. Indoor Unit Indoor Unit Control Unit Heat Exchanger Sensor (Tc) Louver Functions Motor • Cold draft preventing Function Room Temperature Sensor (Ta) • 3-minute Delay at Restart Louver Motor for Compressor Drive Control Infrared Rays Signal Receiver and Indication •...
  • Page 23 FILE NO. SVM-13003 8-2. Outdoor Unit (Inverter Assembly) – –...

  • Page 24: Operation Description

    FILE NO. SVM-13003 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 25 FILE NO. SVM-13003 9-2. Operation Description 1. Basic operation ......................25 9-2. 1. Operation control ....................25 2. Cooling/Heating operation ..................26 3. AUTO operation...................... 26 4. DRY operation ......................26 2. Indoor fan motor control ....................27 3. Outdoor fan motor control ................... 29 4.

  • Page 26: Basic Operation

    FILE NO. SVM-13003 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 27: Cooling/Heating Operation

    FILE NO. SVM-13003 Item Operation flow and applicable data, etc. Description 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 from the indoor controller to the outdoor unit.

  • Page 28: Indoor Fan Motor Control

    FILE NO. SVM-13003 Item Operation flow and applicable data, etc. Description 2. Indoor fan <In cooling operation> motor control ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ Symbols (This operation controls the fan speed at indoor unit side.) The indoor fan (cross flow fan) is operated by the phase- UH: Ultra High control induction motor.
  • Page 29 FILE NO. SVM-13003 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: Outdoor Fan Motor Control

    FILE NO. SVM-13003 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 31: Capacity Control

    FILE NO. SVM-13003 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 32: Release Protective Control By Temperature Of Indoor Heat Exchanger

    FILE NO. SVM-13003 Item Operation flow and applicable data, etc. Description 6. Release protective <In cooling/dry operation> 1) When temperature of the indoor control by heat exchanger drops below 5°C, (Prevent-freezing control for indoor heat exchanger) temperature of the compressor speed is re- In cooling/dry operation, the sensor of indoor heat indoor heat duced.

  • Page 33: Defrost Control (Only In Heating Operation)

    FILE NO. SVM-13003 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.

  • Page 34: Louver Control

    FILE NO. SVM-13003 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 35: Eco Operation

    * 10 (DRY max - COOL min) /6 × 3 + COOL min * 9 (DRY max - COOL min) /6 × 2 + COOL min * 8 (DRY max - COOL min) /6 × 1 + COOL min RAS-22N3KV2-A Cool min DRY max <Heating operation>...

  • Page 36: Temporary Operation

    FILE NO. SVM-13003 Item Operation flow and applicable data, etc. Description Pressing [RESET] button starts the temporary 1) When pressing [RESET] button, the 10. Temporary operation operation of [AUTO] operation. When keeping temporary [AUTO] operation starts. [RESET] button pressed for 10 seconds or more, the 2) When keeping [RESET] button pressed for temporary [COOL] operation is performed.

  • Page 37: Pulse Motor Valve (Pmv) Control

    FILE NO. SVM-13003 Item Operation flow and applicable data, etc. Description 12. Pulse This function controls throttle amount of the 1) When starting the operation, move the Modulating refrigerant in the refrigerating cycle. valve once until it fits to the stopper. valve (P.M.V.) (Initialize) According to operating status of the air conditioner,...

  • Page 38: Self-Cleaning Function

    FILE NO. SVM-13003 Item Operation flow and applicable data, etc. Description 13. Self-Cleaning 1. Purpose function The Self-Cleaning operation is to mini- mize 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 39 FILE NO. SVM-13003 Item Operation flow and applicable data, etc. Description 13. Self-Cleaning • Self-Cleaning diagram function Operation display FCU fan rpm is depend on presetting. (500RPM) OPEN (12.7º) FCU louver OPEN CLOSE ON or OFF ON or OFF Timer display depend on presetting of timer function.

  • Page 40: Remote Controller-A Or B Selection

    FILE NO. SVM-13003 Item Operation flow and applicable data, etc. Description J201 PCB NO : MCC-5045 14. Remote-A or B Setting the remote controller 1. Purpose selection To separate using of remote control for each indoor This operation is to operate only one unit in case of 2 air conditioner are installed nearly.

  • Page 41: Quiet Mode

    FILE NO. SVM-13003 Item Operation flow and applicable data, etc. Description 15. QUIET mode When the [QUIET] button is pressed, the fan of the Quiet mode is the system which, control the indoor unit will be restricted the revolving speed at revolving speed of indoor fan to work −...

  • Page 42: Hi Power Mode

    FILE NO. SVM-13003 Item Operation flow and applicable data, etc. Description 18. Hi-POWER ([Hi-POWER] button on the remote controller Mode is pressed) When [Hi-POWER] button is pressed while the indoor ∗ The Hi-POWER operation will be cancelled unit is in Auto, Cooling or Heating operation, Hi- when press [Hi-POWER] button again.

  • Page 43: Auto Restart Function

    FILE NO. SVM-13003 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 44: How To Cancel The Auto Restart Function

    FILE NO. SVM-13003 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 45: Remote Controller And Its Functions

    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 : Start the operaton.
  • Page 46 FILE NO. SVM-13003 4. DRY OPERATION (COOLING ONLY) For dehumidification, a moderate cooling performance is controlled automatically. 1. Press : Select Dry MODE 2. Press : Set the desired temperature. 5. Hi-POWER OPERATION To automatically control room temperature and airflow for faster cooling operation (except in DRY and FAN ONLY mode).
  • Page 47 FILE NO. SVM-13003 9. PRESET OPERATION Set your preferred operation for future use. The setting will be memorized by the unit for future operation (except air flow direction). 1. Select your preferred operation. 2. Press and hold for 3 seconds to memorize the setting. The mark displays.

  • Page 48: Names And Functions Of Indications On Remote Controller

    FILE NO. SVM-13003 9-4-3. Names and Functions of Indications on Remote Controller [Display] All indications, except for the clock time indicator, are displayed by pushing the button. Transmission mark (PRESET) indicator This transmission mark indicates when the remote Flashes for 3 seconds when the PRESET button is controller transmits signals to the indoor unit.

  • Page 49: Installation Procedure

    FILE NO. SVM-13003 10. INSTALLATION PROCEDURE 10-1. Installation Diagram of Indoor and Outdoor Units For the rear left and left piping Hook Installation plate Wall Insert the cushion between the indoor unit and wall, and tilt the indoor unit for better operation. Do not allow the drain hose to get slack.
  • Page 50 FILE NO. SVM-13003 10-2. Installation 10-2-1. Optional installation parts Part Parts name Q'ty Code Refrigerant piping Liquid side : ¬ 6.35 mm each Gas side : ¬ 12.7 mm Pipe insulating material (polyethylene foam, 8 mm thick) Putty, PVC tapes each <Fixing bolt arrangement of outdoor unit>...
  • Page 51 FILE NO. SVM-13003 10-2-2. Accessory and installation parts Part Part Part Part name (Q’ty) Part name (Q’ty) Part name (Q’ty) Installation plate x 1 Remote control holder x 1 Drain nipple* x 1 Wireless remote control x 1 Filter x 1 Cap water proof* x 2 Filter x 1 Battery x 2...

  • Page 52: Installation/Servicing Tools

    FILE NO. SVM-13003 10-2-3. Installation/Servicing Tools Changes in the product and components In the case of an air conditioner using R410A, in order to prevent any other refrigerant from being charged accidentally, the service port diameter of the outdoor unit control valve (3 way valve) has been changed. (1/2 UNF 20 threads per inch) •...

  • Page 53: Indoor Unit

    FILE NO. SVM-13003 10-3. Indoor Unit 10-3-2. Cutting a Hole and Mounting Installation Plate 10-3-1. Installation Place • A place which provides the spaces around the <Cutting a hole> indoor unit as shown in the diagram. When install the refrigerant pipes from the rear. •...

  • Page 54: Wiring Connection

    FILE NO. SVM-13003 <When the installation plate is directly 10-3-3. Wiring Connection mounted on the wall> <How to connect the connecting cable> 1. Securely fit the installation plate onto the wall by screwing it in the upper and lower parts to hook Wiring the connecting cable can be carried up the indoor unit.

  • Page 55: How To Connect Remote Controller

    FILE NO. SVM-13003 10-3-4. How to Connect Remote Controller 70 mm for Wire Operation * Wire size 28-22 AWG (0.08~0.32 mm Outer diameter not over 4.7 mm, control wire length 30 m. 5 mm Indoor unit Control wire out position Control wire Control wire Remote controller...

  • Page 56: Piping And Drain Hose Installation

    FILE NO. SVM-13003 Rear right Control wire Control wire Rear left Screw (∅3.1 x 16L) for Hole for hang hang remote controller remote controller Bottom left Remote controller Left Wall Bottom right Remote controller Right Screw (∅3.1 x 25L) for 1.
  • Page 57 FILE NO. SVM-13003 <How to attach the drain cap> <In case of bottom right or bottom left piping> 1. Insert hexagon wrench (4 mm) in a center head. • After scribing slits of the front panel with a knife or a making-off pin, cut them with a pair of nippers or an equivalent tool.

  • Page 58: Indoor Unit Fixing

    FILE NO. SVM-13003 CAUTION Information • Bind the auxiliary pipes (two) and connecting The lower part of indoor unit may float, due to the cable with facing tape tightly. condition of piping and you cannot fix it to the installation plate. In that case, use the 11 screws In case of leftward piping and rear-leftward piping, bind the auxiliary pipes (two) only with provided to fix the unit and the installation plate.
  • Page 59 FILE NO. SVM-13003 CAUTION Arrange the drain pipe for proper drainage from the unit. Improper drainage can result in dew-dropping. This air conditioner has the structure designed to drain water collected from dew, which forms on the back of the indoor unit, to the drain pan. Therefore, do not store the power cord and other parts at a height above the drain guide.

  • Page 60: Outdoor Unit

    FILE NO. SVM-13003 10-4. Outdoor Unit CAUTION 10-4-1. Installation place 1. Insall the outdoor unit in a location where there are  A place which provides the spaces around the no obstructions near its air intake or air outlet. outdoor unit as shown in the left diagram. 2.
  • Page 61 FILE NO. SVM-13003 10-4-4. Evacuating Imperial (wing nut type) Outer dia. of copper pipe R410A After the piping has been connected to the indoor unit, you can perform the air purge together at once. ∅ 6.35 1.5 to 2.0 CAUTION ∅...
  • Page 62 FILE NO. SVM-13003 10-4-5. Wiring connection CAUTION 1. Remove the valve cover, the electric parts cover  KEEP IMPORTANT 5 POINTS FOR PIPING WORK and the cord clamp from the oudoor unit. (1) Take away dust and moisture (Inside of the 2.
  • Page 63 FILE NO. SVM-13003 10-5-2. Remote Control A-B Selection Power source 220-240V Single phase, 50Hz • When two indoor units are installed in the same room or Maximum running current 12.0A adjacent two rooms, if operating a unit, two units may Plug socket &...
  • Page 64 FILE NO. SVM-13003 10-5-4. Auto restart setting 10-5-3. Test operation This product is designed so that, after a power failure, To switch the TEST RUN (COOL) mode, press it can restart automatically in the same operating mode [RESET] button for 10 sec. as before the power failure.

  • Page 65: How To Diagnose The Trouble

    FILE NO. SVM-13003 11. HOW TO DIAGNOSE THE TROUBLE The pulse motor circuits are mounted to both indoor and outdoor units. Therefore, diagnose troubles according to the trouble diagnosis procedure as described below. (Refer to the check points in servicing written on the wiring diagrams attached to the indoor/outdoor units.) Table 11-1 Troubleshooting Procedure First Confirmation...
  • Page 66 FILE NO. SVM-13003 CAUTION A high voltage (equivalent to the supply voltage) is also energized to ground through the sensors, PMV and other low-voltage circuits. The sensor leads and other wires are covered with insulated tubes for protection. Nevertheless, care must be taken to ensure that these wires are not pinched. Take sufficient care to avoid directly touching any of the circuit parts without first turning off the power.

  • Page 67: First Confirmation

    FILE NO. SVM-13003 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 68: Primary Judgment

    FILE NO. SVM-13003 11-2. Primary Judgment To diagnose the troubles, use the following methods. 1) Judgment by flashing LED of indoor unit 2) Self-diagnosis by service check remote controller 3) Judgment of trouble by every symptom Firstly use the method 1) for diagnosis. Then, use the method 2) or 3) to diagnose the details of troubles. 11-3.

  • Page 69: Self-Diagnosis By Remote Controller (Check Code)

    FILE NO. SVM-13003 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 70 FILE NO. SVM-13003 11-4-2 Caution at Servicing 1. After using the service mode of remote controller finished, press the [ ] button to reset the remote controller to normal function. 2. After finished the diagnosis by the remote controller, turn OFF power supply and turn its ON again to reset the air conditioner to normal operation.
  • Page 71 FILE NO. SVM-13003 Block distinction Operation of diagnosis function Action and Judgment Check Check Display flashing Block Cause of operation conditioner code code error status Serial signal 1) Defective wiring of the Indoor unit Flashes when 1) to 3) The outdoor unit never and connecting connecting cable or operates...
  • Page 72 FILE NO. SVM-13003 Block distinction Operation of diagnosis function Action and Judgment Check Check Display flashing Block Cause of operation conditioner code code error status Outdoor P.C. Current on inverter circuit All OFF Flashes after 1. Remove connecting lead wire of the board is over limit in short time.
  • Page 73 FILE NO. SVM-13003 Block distinction Operation of diagnosis function Action and Judgment Check Check Display flashing Block Cause of operation conditioner code code error status Compressor drive output error. All OFF Flashes after 1. Check installation conditions such as (Relation of voltage, current error is detected packed valve opening, refrigerant and frequency is abnormal)
  • Page 74 FILE NO. SVM-13003 Block distinction Operation of diagnosis function Action and Judgment Check Check Display Block Cause of operation conditioner code code flashing error status Compressor does not rotate. All OFF Flashes after 1. Remove connecting lead wire of the Because of missed wiring, error is detected compressor, and operate again.

  • Page 75: Judgement Of Trouble By Every Symptom

    FILE NO. SVM-13003 11-5. Judgement of Trouble by Every Symptom 11-5-1. Indoor unit (Including remote controller) (1) Indoor unit is not operated. Operation Check Item Considerable principle cause Turn off power supply once, and Measures 5 second later, turn it on again. Item by symptoms Is OPERATION indicator flashing? Is it possible to turn on...
  • Page 76 FILE NO. SVM-13003 (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-13003 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-13003 (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-13003 (5) Troubleshooting for remote controller <Primary check> Check that A or B selected on the main unit is matched with A or B selected on the remote controller. The unit does not beep at all. Push the [ ] button.
  • Page 80 FILE NO. SVM-13003 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-13003 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: How To Diagnose Trouble In Outdoor Unit

    FILE NO. SVM-13003 11-7. How to Diagnose Trouble in Outdoor Unit Check Power Supply (Voltage Rate ±10%) Turn OFF power supply. Remove connector of compressor. • Connect discharge Check 25A resistance (approx. 100Ω, fuse (F01) 40W) or soldering iron failure? (plug) between +, –...
  • Page 83 FILE NO. SVM-13003 Does outdoor fan operate normally? Turn OFF power supply. Does compresser operate normally? Remove connector CN300 of outdoor fan motor. Check winding resistance by ohmmeter are correct? Compressor Check rotor locking by rotate is normal with hand. Can it rotate? Turn OFF power supply.

  • Page 84: How To Check Simply The Main Parts

    FILE NO. SVM-13003 11-8. How to Check Simply the Main Parts (2) Inspection procedures 1) When a P.C. board is judged to be defective, 11-8-1. How to check the P.C. board (Indoor unit) check for disconnection, burning, or discolora- tion of the copper foil pattern or this P.C. board. (1) Operating precautions 2) The P.C.
  • Page 85 FILE NO. SVM-13003 11-8-2. P.C. Board Layout +12V [1] Sensor characteristic table TD : Discharge temp. sensor TA : Room temp. sensor TC : Heat exchanger temp. sensor TO : Outdoor temp. sensor TA, TC, TO, TE, TS TE : Outdoor heat exchanger temp. sensor TS : Suction temp.
  • Page 86 FILE NO. SVM-13003 11-9-3. 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 87 FILE NO. SVM-13003 11-8-5. Checking Method for Each Part Part name Checking procedure Electrolytic capacitor 1. Turn OFF the power supply breaker. (For boost, smoothing) 2. Discharge all three capacitors completely. 3. Check that safety valve at the bottom of capacitor is not broken. 4.
  • Page 88 FILE NO. SVM-13003 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 10 seconds though it started rotating. • Outdoor fan motor rotates or does not rotate according to the position where the fan stopped, etc. Remote controller check code “02 : Outdoor block, 1A : Outdoor fan drive system error”...

  • Page 89: How To Replace The Main Parts

    FILE NO. SVM-13003 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 90 FILE NO. SVM-13003 Part name Procedures Remarks Front panel 4) Press "PUSH" part under the front panel  and remove hooks of the front panel from the installation plate. Installation plate Front panel Press 5) Remove the front panel fixing screws. (4 pcs.) 6) Take off four hooks of panel from rear side.
  • Page 91 FILE NO. SVM-13003 Part name Procedures Remarks Electric parts 1) Follow the procedure up to 6) in  above. ‚ box assembly 2) Remove screw of earth lead attached to the end plate of the evaporator. 3) Remove the lead wire cover, and remove connector for the fan motor and connec- tor for the louver motor from the electric parts box assembly.
  • Page 92 FILE NO. SVM-13003 Part name Procedures Remarks ƒ Horizontal louver 1) Remove shaft of the horizontal louver from the back body. (First remove the left shaft, and then remove other shafts while sliding the horizontal louver leftward.) „ Evaporator 1) Follow to the procedure in the item ‚...
  • Page 93 FILE NO. SVM-13003 Part name Procedures Remarks … Bearing 1) Follow to the procedure in the item „ 2) Remove the two screws used to secure the bearing base. Two screws screws 3) Remove the bearing base. Bearing base <Caution at assembling> •...
  • Page 94 FILE NO. SVM-13003 Part name Procedures Remarks † Fan motor 1) Follow to the procedure till item „ 2) Loosen the set screw of the cross flow fan. 3) Remove two fixing screws of the motor cover and them remove the motor cover. 4) Remove two more fixing screws of the motor band and remove the motor band.
  • Page 95 FILE NO. SVM-13003 Part name Procedures Remarks ‡ Cross flow fan <Caution at reassembling> 1) To incorporate the fan motor, remove the fan motor rubber (at shaft core side), incorporate the motor into the position in the following figure, and then install the fan motor. •...
  • Page 96 10-2. Outdoor Unit FILE NO. SVM-13003 Part name Procedure Remarks  Common 1. Detachment procedure NOTE Upper cabinet Wear gloves for this job. Otherwise, you may injure your hands on the parts, etc. Waterproof cover 1) Stop operation of the air conditioner, and turn off the main switch of the breaker for air conditioner.
  • Page 97 FILE NO. SVM-13003 Part name Procedure Remarks Front cabinet 1. Detachment ‚ 1) Perform step 1 in  2) Remove the fixing screws (ST1TØ4 × 10L 2 pcs.) used to secure the front cabinet and inverter cover, the screws (ST1TØ4 ×...
  • Page 98 FILE NO. SVM-13003 Part name Procedure Remarks Inverter 1) Perform work of item 1 in ƒ  Inverter cover assembly 2) Remove screw (ST1TØ4 × 10L 2 pcs.) of the upper part of the front cabinet. P.C. board (Soldered surface) •...
  • Page 99 FILE NO. SVM-13003 Part name Procedure Remarks Control board 1. Disconnect the leads and connectors connected to „ assembly the other parts from the control board assembly. 1) Leads • 3 leads (black, white, orange) connected to CN603 terminal block. CN601 CN600 CN701...
  • Page 100 FILE NO. SVM-13003 Part name Procedure Remarks Side cabinet 1. Side cabinet (right) … 1) Perform step 1 in ‚ and all the steps in ƒ 2) Remove the fixing screw (ST1TØ4 × 10L 3 pcs.) used for securing the side cabinet to the bottom plate and valve fixing panel.
  • Page 101 FILE NO. SVM-13003 Part name Procedure Remarks Compressor 1) Perform work of item 1 of  ‚ ƒ „ ‡ … 2) Extract refrigerant gas. 3) Remove the partition board. (ST1TØ4 × 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 102 FILE NO. SVM-13003 Part name Procedure Remarks Electronic ‰ 1. Detachment expansion valve 1) Perform step 1 in ‚ , all the steps in ƒ coil and 1 in … 2) Remove the coil by pull it upward. 2. Attachment 1) Insert a valve coil to value body by push it downward.
  • Page 103 FILE NO. SVM-13003 Part name Procedure Remarks TE sensor (outdoor heat exchanging temperature sensor) • Attachment Install the sensor onto the straight pipe part of the condenser output pipe. Arrow D Detail C Detail B Detail C Detail A TS sensor (Suction pipe temperature sensor) •...
  • Page 104 FILE NO. SVM-13003 Part name Procedure 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). Common service 3) Move the protective tube toward the Cutting here...

  • Page 105: Exploded Views And Parts List

    FILE NO. SVM-13003 13. EXPLODED VIEWS AND PARTS LIST 13-1. Indoor Unit Location Part Location Part Description Description 43T00597 FRONT PANEL ASSY 43T39020 BAND, MOTOR, LEFT 43T09469 GRILLE OF AIR INLET ASSY 43T39022 BAND, MOTOR, RIGHT UP 43T03014 BODY ASSY, BACK 43T39023 BAND,MOTOR, RIGHT DOWN 43T80331...
  • Page 106 FILE NO. SVM-13003 13-2. Indoor Unit (Part-E) Location Part Location Part Description Description 43T50308 SENSOR HEAT EXCHANGER 43T6V316 PC BOARD ASSY;WRS-LED 43T60331 TERMINAL; 3P 43T69966 PC BOARD ASSY 43T69320 TEMPERATURE SENSOR 43T21397 STEPPING-MOTOR 43T62003 CORD CLAMP 43T60386 MOTOR CORD – –...
  • Page 107 FILE NO. SVM-13003 13-3. Outdoor Unit Location Part Location Part Description Description 43T00561 UPPER CABINET 43T20331 PROELLER FAN 43T19349 FAN GUARD 43T21375 FAN MOTOR 43T00562 PACKED VALVE COVER ASSEMBLY 43T47001 NUT FLANGE 43T19350 HANDLE 43T97001 43041627 COMPRESSOR, ASSY 43T49335 RUBBER CUSHION 43T43458 CONDENSOR ASSEMBLY 43T46343...
  • Page 108 FILE NO. SVM-13003 13-4. Outdoor Unit (Part-E) Location Part Location Part Description Description 43T62331 HEATSINK 43T60377 TEMPERATURE SENSOR 43T69965 PC BOARD 43T50304 SENSOR;HEAT EXCHANGER 43T60392 TERMINAL-5P 43T62313 BASE-PLATE-PC 43T60326 FUSE – 107 –...
  • Page 109 TOSHIBA CARRIER (THAILAND) CO.,LTD.

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