Toshiba RAS-10SAV-A Service Manual
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Toshiba RAS-10SAV-A Service Manual

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FILE NO. SVM-07008-1

SERVICE MANUAL

AIR CONDITIONER

SPLIT WALL TYPE
RAS-10SKV-E / RAS-10SAV-E
RAS-10SKV-A / RAS-10SAV-A
Revised May, 2007

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Summary of Contents for Toshiba RAS-10SAV-A

  • Page 1: Service Manual

    FILE NO. SVM-07008-1 SERVICE MANUAL AIR CONDITIONER SPLIT WALL TYPE RAS-10SKV-E / RAS-10SAV-E RAS-10SKV-A / RAS-10SAV-A Revised May, 2007...

  • Page 2: Table Of Contents

    1. SAFETY PRECAUTIONS ... 2 2. SPECIFICATIONS ... 4 3. REFRIGERANT R410A ... 6 4. CONSTRUCTION VIEWS ... 14 5. WIRING DIAGRAM ... 16 6. SPECIFICATIONS OF ELECTRICAL PARTS ... 18 7. REFRIGERANT CYCLE DIAGRAM ... 20 8. CONTROL BLOCK DIAGRAM ... 22 9.

  • Page 3: Safety Precautions

    For general public use Power supply cord of outdoor unit shall be more than 1.5 mm sheathed flexible cord. • Read this “SAFETY PRECAUTIONS” carefully before servicing. • The precautions described below include the important items regarding safety. Observe them without fail. •...
  • Page 4 • DO NOT INSTALL NEAR CONCENTRATIONS OF COMBUSTIBLE GAS OR GAS VAPORS. FAILURE TO FOLLOW THIS INSTRUCTION CAN RESULT IN FIRE OR EXPLOSION. • TO PREVENT THE INDOOR UNIT FROM OVERHEATING AND CAUSING A FIRE HAZARD, PLACE THE UNIT WELL AWAY (MORE THAN 2 M) FROM HEAT SOURCES SUCH AS RADIATORS, HEAT REGISTORS, FURNACE, STOVES, ETC.

  • Page 5: Specifications

    (mm) (mm) (mm) (mm) (kg) (Cooling / Heating) (Cooling / Heating) – 4 – FILE NO. SVM-07008 RAS-10SKV-E, RAS-10SKV-A RAS-10SAV-E, RAS-10SAV-A 1.1 - 3.0 0.9 - 4.1 1Ph/50Hz/220-240V Cooling Heating 0.16 - 0.14 0.16 - 0.14 Cooling Heating 3.96- 3.63 3.44 - 3.16...

  • Page 6: Operation Characteristic Curve

    2-2. Operation Characteristic Curve <Cooling> Compressor Speed (rps) 2-3. Capacity Variation Ratio According to Temperature <Cooling> Capacity ratio: 100% 2.5kW (RAS-10SKV-E) 2.5kW (RAS-10SKV-A) Outside Temperature ( <Heating> Conditions Indoor : DB 27 C/WB 19 Outdoor : DB 35 Air Flow : High Pip Length : 5m Voltage : 230V 90 100 110 120...

  • Page 7: Refrigerant R410A

    This air conditioner adopts the new refrigerant HFC (R410A) which does not damage the ozone layer. The working pressure of the new refrigerant R410A is 1.6 times higher than conventional refrigerant (R22). The refrigerating oil is also changed in accordance with change of refrigerant, so be careful that water, dust, and existing refrigerant or refrigerat- ing oil are not entered in the refrigerant cycle of the air conditioner using the new refrigerant during...
  • Page 8 Table 3-2-1 Thicknesses of annealed copper pipes Nominal diameter 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 9 d) Flare Processing Make certain that a clamp bar and copper pipe have been cleaned. 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 10 Table 3-2-6 Flare and flare nut dimensions for R22 Nominal Outer diameter diameter (mm) 6.35 9.52 12.70 15.88 19.05 Fig. 3-2-2 Relations between flare nut and flare seal surface 2. Flare Connecting Procedures and Precautions a) Make sure that the flare and union portions do not have any scar or dust, etc. b) Correctly align the processed flare surface with the union axis.
  • Page 11 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 12: 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. Connect the charge hose to packed valve service port at the outdoor unit’s gas side.

  • Page 13: Brazing Of Pipes

    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 14 2. Characteristics required for flux • Activated temperature of flux coincides with the brazing temperature. • Due to a wide effective temperature range, flux is hard to carbonize. • It is easy to remove slag after brazing. • The corrosive action to the treated metal and brazing filler is minimum.

  • Page 15: Construction Views

    4-1. Indoor Unit Front panel Air inlet Knock out system 55 60 Drain hose (0.5m) 4. CONSTRUCTION VIEWS Air filter Heat exchanger Air outlet Hanger Hanger Hanger Hanger Installation plate outline Center line – 14 – FILE NO. SVM-07008 Knock out system 60 55 Connecting pipe (0.37m) (Flare...
  • Page 16 FILE NO. SVM-07008 4-2. Outdoor Unit − 15 −...

  • Page 17: Wiring Diagram

    FILE NO. SVM-07008 5. WIRING DIAGRAM 5-1. Indoor Unit – 16 –...
  • Page 18 FILE NO. SVM-07008 – 17 –...

  • Page 19: Specifications Of Electrical Parts

    6. SPECIFICATION OF ELECTRICAL PARTS 6-1. Indoor Unit Parts name Fan motor (for indoor) Thermo. sensor (TA-sensor) Micro power module (T101) Microcontroller unit (IC81) Heat exchanger sensor (TC-sensor) Line filter (L01) Diode (D01,D02,D03 and D04) Capacitor (C03) Fuse (F01) Regulator IC (IC12) Varistor (R21) Louver motor Type...
  • Page 20 6-2. Outdoor Unit (RAS-10SAV-E, RAS-10SAV-A) Parts name SC coil (Noise filter) DC-DC transformer Reactor Outside fan motor Fan control relay Outside air temp. sensor (TO sensor) Heat exchanger temp. sensor (TE sensor) Dischenge temp. sensor (TD sensor) Terminal block (6P)

  • Page 21: Refrigerant Cycle Diagram

    7. REFRIGERANT CYCLE DIAGRAM 7-1. Refrigerant Cycle Diagram RAS-10SKV-E / RAS-10SAV-E RAS-10SKV-A / RAS-10SAV-A Pressure measurement Gauge attaching port Vacuum pump connecting port Deoxidized copper pipe Outer dia. : 9.52mm Thickness : 0.8mm 4-way valve (STF-0108Z) Temp. measurement NOTE : •...

  • Page 22: Operation Data

    7-2. Operation Data <Cooling> Tempeature Model name condition(°C) RAS- Indoor Outdoor 27/19 35/- 10SKV-E 10SKV-A <Heating> Tempeature Model name condition(°C) RAS- Indoor Outdoor 20/- 10SKV-E 10SKV-A NOTES : 1. Measure surface temperature of heat exchanger pipe around center of heat exchanger path U bent. (Thermistor themometer) 2.

  • Page 23: Control Block Diagram

    8. CONTROL BLOCK DIAGRAM 8-1. Indoor Unit Heat Exchanger Sensor Temperature Sensor Infrared Rays Signal Receiver Initiallizing Circuit Infrared Rays Clock Frequency Oscillator Circuit 36.7KHz Power Supply Circuit Remote Control Noise Filter From Outdoor Unit REMOTE CONTROL Indoor Unit Control Panel M.C.U Functions Louver Control...
  • Page 24 FILE NO. SVM-07008 8-2. Outdoor Unit (Inverter Assembly) – 23 –...

  • Page 25: Operation Description

    9-1. Outline of Air Conditioner Control This air conditioner is a capacity-variable type air conditioner, which uses AC motor both the indoor fan motor and the outdoor fan motor. And the capacity- proportional control compressor which can change the motor speed in the range from 22 to 83 rps is mounted.
  • Page 26 9-2. Operation Description 1. Basic operation ... 26 1. Operation control ... 26 2. Cooling/Heating operation ... 27 3. AUTO operation ... 27 4. DRY operation ... 27 2. Indoor fan motor control ... 28 3. Capacity control ... 30 4.

  • Page 27: Operation Description

    9-2. Operation Description Item Operation flow and applicable data, etc. 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

    Item Operation flow and applicable data, etc. 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

    Item Operation flow and applicable data, etc. 2. Indoor fan <In cooling operation> motor control (This operation controls the fan speed at indoor unit side.) The indoor fan (cross flow fan) is operated by the phase- control induction motor. The fan rotates in 5 stages in MANUAL mode, and in 5 stages in AUTO mode, respec- tively.
  • Page 30 Item Operation flow and applicable data, etc. 2. Indoor fan <In heating operation> motor control HEAT ON Fan speed setup AUTO TC ≥ 42˚C * Fan speed = (TC – (Fig. 4) Basic fan control [ ˚C ] –0.5 –1.0 –1.5 –2.0 –2.5...

  • Page 31: Capacity Control

    Item Operation flow and applicable data, etc. 3. Capacity The cooling or heating capacity depending on the load is control adjusted. According to difference between the setup value of tempera- ture and the room temperature, the capacity is adjusted by the compressor revolution.

  • Page 32: Release Protective Control By Temperature Of Indoor Heat Exchanger

    Item Operation flow and applicable data, etc. 5. Release protective <In cooling/dry operation> control by tempera- (Prevent-freezing control for indoor heat exchanger) ture of indoor heat In cooling/dry operation, the sensor of indoor heat exchanger exchanger detects evaporation temperature and controls the compressor speed so that temperature of the heat exchanger does not exceed the specified value.

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

    Item Operation flow and applicable data, etc. 6. Defrost control (This function removes frost adhered to the outdoor (Only in heating heat exchanger.) operation) The temperature sensor of the outdoor heat ex- changer (Te sensor) judges the frosting status of the outdoor heat exchanger and the defrost operation is performed with 4-way valve reverse defrost system.

  • Page 34: Louver Control

    Item Operation flow and applicable data, etc. 7. Louver control This function controls the air direction of the indoor unit. • The position is automatically controlled according to the operation 1) Louver mode (COOL/HEAT). position • 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

    Item Operation flow and applicable data, etc. When pressing [ECO] button on the remote controller, a 8. ECO Economic operation is performed. operation <Cooling operation> This function operates the air conditioner with the difference between the set and the room temperature as shown in the following figure.

  • Page 36: Temporary Operation

    Item Operation flow and applicable data, etc. 9. Temporary Pressing [RESET] button starts the temporary opera- operation tion of [AUTO] operation. When keeping [RESET] button pressed for 10 seconds or more, the temporary [COOL] operation is performed. Filter lamp ON Did you press [RESET] button for 3 seconds or more? Did you press [RESET] button...

  • Page 37: Self-Cleaning Function

    Item Operation flow and applicable data, etc. 11. Self-Cleaning function Unit now performing cooling or dry operation Press “STOP” button Only timer indicator lights, and Self Cleaning operation starts Time set now elapses Operation stops • During Self-Cleaning operations: The louver opens slightly.

  • Page 38: Selt-Cleaning Function Release

    Item Operation flow and applicable data, etc. • Self-Cleaning diagram 11. Self-Cleaning function Operation display FCU fan rpm is depend on presetting. FCU louver ON or OFF Timer display depend on presetting of timer function. ON or OFF Compressor depend on presetting per room temperature. CDU fan ON or OFF depend on presetting per room temperature.

  • Page 39: Remote-A Or B Selection

    Item Operation flow and applicable data, etc. 13. Romote-A or B Setting the remote controller selection To separate using of remote control for each indoor unit in case of 2 air conditioner are installed nearly. Remote Control B Setup. 1) Press RESET button on the indoor unit to turn the air conditioner ON.

  • Page 40: Quiet Mode

    Item Operation flow and applicable data, etc. 14. QUIET mode When the [QUIET] button is pressed, the fan of the indoor unit will be restricted the revolving speed at speed L until the [QUIET] button is pressed once again (cancel Quiet mode). 15.

  • Page 41: Hi-Power Mode

    Item Operation flow and applicable data, etc. 17. Hi-POWER ([Hi-POWER] button on the remote controller Mode is pressed) When [Hi-POWER] button is pressed while the indoor unit is in Auto, Cooling or Heating operation, Hi- POWER mark is indicated on the display of the remote controller and the unit operates as follows.

  • Page 42: 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 not set to work when shipped from the factory.

  • Page 43: How To Cancel The Auto Restart Function

    9-3-2. How to Cancel the Auto Restart Function To cancel auto restart function, proceed as follows : Repeat the setting procedure : the unit receives the signal and beeps three times. The unit will be required to be turned on with the remote controller after the main power supply is turned off. •...

  • Page 44: Power Failure During Timer Operation

    The coutomised settings control temperature air flow strength, air flow direction and other settings to provide you alternate contact with "ONE-TOUCH" OF THE BUTTON. If you prefer other settings you can select from the many other operation functions of your Toshiba unit Press ONE-TOUCH : Start the operaton.

  • Page 45: Remote Controller And Its Fuctions

    4. DRY OPERATION (COOLING ONLY) For dehumidification, a moderate cooling performance is controlled automatically. 1. Press MODE : Select Dry 2. Press MODE : Set the desired temperature. 5. Hi-POWER OPERATION To automatically control room temperature and airflow for faster cooling or heating operation (except in DRY and FAN ONLY mode) Press HI-POWER : Start and stop the operation.
  • Page 46 9. PRESET OPERATION Set your preferred operation for future use. The setting will be memorized by the unit for future operation (except air flow direction). 1. Select your preferred operation. 2. Press and hold PRESET for 3 seconds to memorize the setting. The displays.

  • Page 47: 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 1. Transmission mark This transmission mark remote controller transmits signals to the indoor unit. 2. Mode indicator Indicates the current operation mode.

  • Page 48: Installation Procedure

    10. INSTALLATION PROCEDURE 10-1-1. Installation Diagram of Indoor and Outdoor Units Super Oxi Deo filter Super Sterilizer Batteries Pan head wood screw Wireless remote Before installing the wireless remote controller • Loading Batteries 1. Remove the battery cover. 2. Insert 2 new batteries (AAA type) following the (+) and (- ) positions.
  • Page 49 10-1-2. Optional installation parts Part Parts name Code Refrigerant piping Liquid side : ∅6.35 mm Gas side ∅ 9.52 mm Pipe insulating material (polyethylene foam, 6 mm thick) Putty, PVC tapes <Fixing bolt arrangement of outdoor unit> 500 mm Air inlet 97 mm Air outlet Drain outlet...
  • Page 50 10-1-3. Accessory and installation parts Part Part name (Q’ty) Installation plate x 1 Wireless remote control x 1 Battery x 2 Others Name Owner’s manual Installation manual Part Part name (Q’ty) Remote control holder x 1 Super Oxi Deo filter x 1 Super Sterilizer filter x 1 –...
  • Page 51 10-1-4. 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) In order to increase the pressure resisting strength of the refrigerant piping, flare processing diameter and size of opposite side of flare nuts has been changed.

  • Page 52: Indoor Unit

    10-2. Indoor Unit 10-2-1. Installation place A place which provides the spaces around the indoor unit as shown in the above diagram. A place where there is no obstacle near the air inlet and outlet. A place that allows easy installation of the piping to the outdoor unit.
  • Page 53 <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 54 10-2-4. Wiring connection <How to connect the connecting cable> Wiring of the connecting cable can be carried out without removing of the front panel. 1. Remove the air inlet grille. Open the air inlet grille upward and pull it toward you.
  • Page 55 <How to fix the Drains Cap> 1) Insert hexagonal wrench ( 4 mm) in a center head. 4 mm Fig. 10-2-11 2) Firmly insert drains cap. No gap Do not apply lubricating oil (refrigerant machine oil) when inserting the drain cap. Application causes deterioration and drain leakage of the plug.

  • Page 56: Outdoor Unit

    10-3. Outdoor Unit 10-3-1. Installation place A place which provides the spaces around the outdoor unit as shown in the left diagram. A place which can bear the weight of the outdoor unit and does not allow an increase in noise level and vibration.
  • Page 57 Outer dia. Tightening torque of copper pipe ∅6.35 mm 16 to 18 (1.6 to 1.8 kgf·m) ∅ 9.52 mm 30 to 42 (3.0 to 4.2 kgf·m) Tightening torque of flare pipe connections The operating pressure of R410A is higher than that of R22.
  • Page 58 <Packed valve handling precautions> Open the valve stem all the way out; but do not try to open it beyond the stopper. Securely tighten the valve stem cap with torque in the following table: Gas side 30 to 42 N·m (∅9.52 mm) (3.0 to 4.2 kgf·m) Liquid side...
  • Page 59 10-3-5. Gas leak test Valve cover Electric parts cover Check places for outdoor unit Fig. 10-3-10 Check the flare nut connections for the gas leak with a gas leak detector or soap water. 10-3-6. Indoor unit fixing 1. Pass the pipe through the hole in the wall, and hook the indoor unit on the installation plate at the upper hooks.

  • Page 60: How To Diagnose The Trouble

    11. HOW TO DIAGNOSE THE TROUBLE The pulse modulating circuits are mounted to both indoor and outdoor units. Therefore, diagnose troubles according to the 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 61: Primary Judgment

    11-1-3. Operation which is not a trouble (Program operation) For controlling the air conditioner, the program operations are built in the microcomputer as described in the following table. If a claim is made for running operation, check whether or not it meets to the contents in the following table.

  • Page 62: Judgment By Flashing Led Of Indoor Unit

    11-3. Judgment by Flashing LED of Indoor Unit While the indoor unit monitors the operation status of the air conditioner, if the protective circuit operates, the contents of self-diagnosis are displayed with block on the indoor unit indication section. Check Item code NOTES:...
  • Page 63 If a fault is detected, all lamps on the indoor unit will flash at 5Hz and it will beep for 10 seconds (Beep, Beep, Beep ... ). The timer lamp usually flashes (5Hz) during self-diagnosis. 11-4-1. How to Use Remote Controller in Service Mode TOSHIBA P R E S E T F A N...
  • Page 64 11-4-2. Caution at servicing (1) After servicing, push the [ ] button to return to the normal mode. (2) After servicing by the check code, turn off breaker of the power supply, and turn on breaker of the power supply again so that memory in the microcomputer returns the initial status. However, the check codes are not deleted even if the power supply is turned off because they are stored in the fixed memory.
  • Page 65 Block distinction Operation of diagnosis function Check Check Block Cause of operation code code Ondoor Inverter over-current P .C. protective circuit operates. board (Short time) Position-detect circuit error or short-circuit between windings of compressor Current-detect circuit error Being out of place, disconnection or short- circuit of outdoor temp.

  • Page 66: Judgement Of Trouble By Every Symptom

    11-5. Judgement of Trouble by Every Symptom 11-5-1. Indoor unit (Including remote controller) (1) Power is not turned on (Does not operate entirely) Turn off power supply once, and 5 second later, turn it Is OPERATION lamp blinking? Is it possible to turn on power Is fuse (F01) of indoor control...
  • Page 67 (2) Power is not turned on though Indoor P.C. board is replaced <Confirmation procedure> Turn on power supply. Does operation lamp flash? Is wired correctly to white and black lead wires of terminal board? – 66 – FILE NO. SVM-07008 Correct wiring.
  • Page 68 (3) Only the indoor fan does not operate. <Check procedure> Shut off the power supply once. Turn the power supply. Does the fan stop in no operating status? Start the operation with low fan setting in cool operation. Does the fan rotate? to between red and black Shut off the power supply.
  • Page 69 (4) Indoor fan motor starts rotating by turning on power supply alone. <Cause> The IC is built in the indoor fan motor. Therefore the P .C. board is also mounted to the 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 70 (5) Troubleshooting for remote control Is receiver on indoor unit exposed to direct sunlight? Is there any thyristor fluorescent light nearly? Avoid direct Keep indoor unit sunlight. away from thyristor fluorescent light. Press [ button. Is transmission mark indicated? Does indoor unit operate when moving remote control near receiver or...
  • Page 71 11-5-2. Wiring Failure (Interconnecting and serial signal wire) (1) Outdoor unit does not operate. 1) Is the voltage between indoor terminal block 2 and 3 varied? Confirm that transmission from indoor to outdoor is correctly performed based on the following diagram. NOTE: Measurement should be performed 2 minutes and 30 seconds after starting of the operation.
  • Page 72 11-6. Check Code 1C (Miswiring in indoor/outdoor units) and 1E <Check procedure> Gas leakage, disconnection of TS/TC sensors (Check code 02, 1C) Valve drive check Is coil of the pulse modulation valve (P.M.V.) correctly set? Is connector of coil connected to inverter? Is positioning sound of valve (sound hitting to stopper) heard from valve when the air conditioner starts the operation after turning off power of the air conditioner once?

  • Page 73: How To Diagnose Trouble In Outdoor Unit

    11-7. How to Diagnose Trouble in Outdoor Unit 11-7-1. Summarized inner diagnosis of inverter assembly Diagnosis/Process flowchart Remove connector of compressor. Check 25 A fuse (Part No.F01). Replace fuse. Check electrolytic capacitor, diode block (DB01), etc. Check terminal voltage of electrolytic capacitor.

  • Page 74: How To Check Simply The Main Parts

    Diagnosis/Process flowchart Check winding of compressor. Check Replace fan motor com- position pressor. detect signal. Replace outdoor motor. Replace control board assembly. Check compressor winding resistance. Replace Replace control board. compressor. 11-8. How to Check Simply the Main Parts 11-8-1. How to check the P.C. board (Indoor unit) (1) Operating precautions 1) When removing the front panel or the P.C.
  • Page 75 (3) Checking procedure. Procedure Shut off the power supply and remove the P.C. board assembly from the electronic parts base. Remove the connecting cable from the terminal block. Remove the connector for the motor, and turn the power on. If the OPERATION lamp blinks (0.5 sec.
  • Page 76 <Sensor characteristic table> Temperature (˚C) TA, TC, TO, TE – 75 – FILE NO. SVM-07008 TD : Discharge temp. sensor TA : Room temp. sensor TC : Heat exchanger temp. sensor TO : Outdoor temp. sensor : Outdoor heat exchanger temp. sensor.
  • Page 77 11-8-3. Indoor unit (Other parts) Part name Room temp. (TA) sensor Heat exchanger (TC) sensor Remote control Louver motor 24BYJ48 Indoor fan motor 11-8-4. Outdoor unit Part name Compressor (Model : DA89X1C-23FZ) Outdoor fan motor (Model : SKF-240-20B-1) Checking procedure Disconnect the connector and measure the resistance value with tester.
  • Page 78 Outdoor temperature sensor (TO), discharge temperature sensor (TD), suction temperature sensor (TS), outdoor heat exchanger temperature sensor (TE) 11-8-5. Checking Method for Each Part Part name Electrolytic capacitor (For raising pressure, smoothing) Converter module Disconnect the connector, and measure resistance value with the tester. (Normal temperature) Temperature 10°C...

  • Page 79: 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 ten seconds though it starts 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 80: How To Replace The Main Parts

    12-1. Indoor Unit Part name Front panel How to remove the front panel 1) Stop the operation of the air conditioner and turn off its main power supply. 2) Pull the air inlet grille toward you to open it and remove the air inlet grille. Then remove the 2 screws fixing the front panel.
  • Page 81 Part name Heat exchanger 1) Remove the front panel, electrical part and the horizontal louver following procedure 3. 2) Remove the pipe holder at the rear side of main unit. 3) Remove the 2 screws on the heat exchanger at the base bearing. 4) Remove the screw on the heat exchanger at the fixed plate from the back body and then pull out the right hand side until the socket of...
  • Page 82 12-2. Microcomputer Part name Common 1) Turn the power supply off to stop the operation procedure of air conditioner. 2) Remove the front panel. Remove the 4 fixing screws. 3) Remove the electrical part base. <P.C. board layout> Procedures Replace the thermal fuse, terminal block, microcomputer ass’y and the P.C.
  • Page 83 FILE NO. SVM-07008 <P.C. board layout> Solder side – 82 –...
  • Page 84 12-3-1. Outdoor Unit Part name Common 1. Detachment procedure 1) Stop operation of the air conditioner, and turn off the main switch and breaker of the air conditioner. 2) Remove the valve cover. (ST1T 4 x 10s 1 pc) After removing screw, remove the valve cover pulling it downward.
  • Page 85 Part name 1) Perform work of item 1 of 1. Inverter assembly 2) Remove screw (ST1T 4 x 10s 1 pc.) of the upper part of the front cabinet. If removing the inverter cover in this condition, the P.C. board can be checked. If there is no space in the upper part of the upper cabinet, perform work of 2.
  • Page 86 Part name Control board 1) Disconnect lead wires and connectors assembly connected from the control board assembly to other parts. 1. Lead wires Connection with terminal block : 3 wires (Black, White, Orange) Connection with compressor : remove the connector (3P) Connection with reactor : remove the connector (2P) 2.
  • Page 87 Part name ƒ 1) Perform work of item 1 of 1 and 1 of 2. Fan motor 2) Remove the flange nut fixing the fan motor and the propeller fan. Flange nut is loosened by turning clockwise. (To tighten the flange nut, turn counter- clockwise.) 3) Remove the propeller fan.
  • Page 88 Part name † Fan guard 1. Detachment 1) Perform work of item 1 of 1 and 1 of 2. Requirement: Perform the work on a corrugated cardboard, cloth, etc. to prevent scratches to the product. 2) Remove the front cabinet, and place it down so that the fan guard side faces downwards.
  • Page 89 Part name Replacement of 1) Cut the sensor 100 mm longer than old temperature one. sensor for 2) Cut the protective tube after pulling out it servicing only (200 mm). 3) Move the protective tube toward the Common service thermal sensor side and tear the tip of parts of sensor lead wire in two, then strip the covering TO, TS, TE, TD...

  • Page 90: Exploded Views And Parts List

    13. EXPLODED VIEWS AND PARTS LIST 13-1. Indoor Unit (E-Parts Assy) Location Part Description 43T60365 TERMINAL BLOCK; 3P 43T69319 TEMPERATURE SENSOR 43T69320 TEMPERATURE SENSOR FILE NO. SVM 07008 Location Part 43T69612 PC BOARD ASSY ;WRS-LED 43T62003 CORD CLAMP 43T69628 ASM-PCB-SERV −...
  • Page 91 13-2. Indoor Unit Location Part Description 43T00478 FRONT PANEL ASSY 43T09402 GRILLE OF AIR INLET (ORIGINAL) 43T09404 GRILLE OF AIR INLET (OPTIONAL;GRAY) 43T03357 BACK BODY ASSY 43T80317 AIR-FILTER 43T09392 HORIZONTAL LOUVER 43T70313 DRAIN-HOSE 43T79301 CAP-DRAIN 43T21363 MOTOR; STEPPING 43T44387 REFRIGERATION CYCLE ASSY 43T47353 PIPE;...
  • Page 92 13-3. Outdoor Unit Location Part Description 43T19335 FAN GUARD 43T20324 PROPELLER FAN 43T00482 FRONT CABINET 43T43403 CONDENSOR ASSEMBLY 43T62323 TERMINAL COVER 43T19336 FIN GUARD 43T47308 CAPILLARY TUBE; 1.0 DIA 43T46331 VALVE;PACKED 9.52 DIA 43T47332 BONNET, 9.52 DIA 43T46332 VALVE;PACKED 6.35 DIA 43T47331 BONNET, 6.35 DIA 43T21396...
  • Page 93 13-4. Outdoor Unit (E-Parts Assy) Location Part Description 43T62320 HEATSINK 43T69620 ASM-PCB-SERV 43T60352 TERMINAL BLOCK; 6P 43T60326 FUSE FILE NO. SVM-07008 Location Part 43T60377 TEMPERATURE SENSOR 43T50304 SENSOR;HEAT EXCHANGER 43T62313 BASE-PLATE-PC 43T55325 CAPACITOR; PLASTIC-FILM − 92 − Description...
  • Page 94 FILE NO. SVM-03008 TOSHIBA CARRIER CORPORATION – 87 –...

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