Toshiba RAS-13UAV-E2 Service Manual
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Toshiba RAS-13UAV-E2 Service Manual

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FILE NO. SVM-03008
SERVICE MANUAL

AIR CONDITIONER

SPLIT WALL TYPE
RAS-13UKV-E2 / RAS-13UAV-E2
Jun., 2003

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Summary of Contents for Toshiba RAS-13UAV-E2

  • Page 1: Air Conditioner

    FILE NO. SVM-03008 SERVICE MANUAL AIR CONDITIONER SPLIT WALL TYPE RAS-13UKV-E2 / RAS-13UAV-E2 Jun., 2003...

  • Page 2: Table Of Contents

    FILE NO. SVM-03008 CONTENTS SPECIFICATIONS Specifications Operation Characteristic Curve Capacity Variation Ratio According to Temperature REFRIGERANT R410A Safety During Installation/Servicing Refrigerant Piping Installation Tools 2-4. Recharging of Refrigerant 2-5. Brazing of Pipes CONSTRUCTION VIEWS Indoor Unit Outdoor Unit WIRING DIAGRAM Indoor Unit Outdoor Unit SPECIFICATION OF ELECTRICAL PARTS...
  • Page 3 FILE NO. SVM-03008 10. HOW TO DIAGNOSE THE TROUBLE 10-1 First Confirmation 10-2 Primary Judgment 10-3 Judgment by Flashing LED of Indoor Unit 10-4 Self-Diagnosis by Remote Control (Check Code) 10-5 Judgment of Trouble by Every Symptom 10-6 Check Code 1C (Miswiring in indoor/outdoor units) and 1E 10-7 How to Diagnose Trouble in Outdoor Unit 10-8 How to Check Simply the Main Parts 10-9 How to Simply Judge Whether Outdoor Fan Motor is Good or Bad...

  • Page 4: Specifications

    FILE NO. SVM-03008 1. SPECIFICATIONS 1-1. Specifications Unit model Indoor RAS-13UKV-E2 Outdoor RAS-13UAV-E2 Current limited — Cooling capacity (kW) Cooling capacity range (kW) 0.9 – 4.0 Heating capacity (kW) Heating capacity range (kW) 0.9 – 6.0 Power supply 220 – 240V –1Ph –50/60Hz Electric Indoor Operation mode...

  • Page 5: Operation Characteristic Curve

    FILE NO. SVM-03008 1-2. Operation Characteristic Curve <Cooling> <Heating> Conditions Conditions Indoor : DB 27 C/WB 19 C Indoor : DB 20 C Outdoor : DB 35 C Outdoor : DB 7 C/WB 6 C Air flow : High Air flow : High Pipe length : 5m Pipe length : 5m 230V...

  • Page 6: Refrigerant R410A

    FILE NO. SVM-03008 2. REFRIGERANT R410A This air conditioner adopts the new refrigerant HFC (5) After completion of installation work, check to (R410A) which does not damage the ozone layer. make sure that there is no refrigeration gas leakage. The working pressure of the new refrigerant R410A is If the refrigerant gas leaks into the room, coming 1.6 times higher than conventional refrigerant (R22).
  • Page 7 FILE NO. SVM-03008 Table 2-2-1 Thicknesses of annealed copper pipes Thickness (mm) Nominal diameter Outer diameter (mm) 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 b) Socket Joints For copper pipes, flare joints or socket joints are Socket joints are such that they are brazed for used.
  • Page 8 FILE NO. SVM-03008 Table 2-2-3 Dimensions related to flare processing for R410A A (mm) Outer Nominal Thickness diameter Conventional flare tool Flare tool for R410A diameter (mm) (mm) clutch type Clutch type Wing nut type 6.35 0 to 0.5 1.0 to 1.5 1.5 to 2.0 9.52 0 to 0.5...

  • Page 9: File No.

    FILE NO. SVM-03008 Fig. 2-2-2 Relations between flare nut and flare seal surface (2) Flare Connecting Procedures and Precautions When it is strong, the flare nut may crack and a) Make sure that the flare and union portions do may be made non-removable. When choosing not have any scar or dust, etc.

  • Page 10: Tools

    FILE NO. SVM-03008 2-3. Tools 2-3-1. Required tools The service port diameter of packed valve of the outdoor unit in the air conditioner 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 12.70 copper pipe) of the refrigerant piping are lengthened.

  • Page 11: Recharging Of Refrigerant

    FILE NO. SVM-03008 2-4. 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 indi- cated -0.1 Mpa (-76 cmHg), place the handle Low in the fully closed position, and turn off the Connect the charge hose to packed valve service...

  • Page 12: Brazing Of Pipes

    FILE NO. SVM-03008 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 13 FILE NO. SVM-03008 (2) Characteristics required for flux 2-5-3. Brazing Activated temperature of flux coincides with the As brazing work requires sophisticated techniques, brazing temperature. experiences based upon a theoretical knowledge, it Due to a wide effective temperature range, flux must be performed by a person qualified.

  • Page 14: Construction Views

    FILE NO. SVM-03008 3. CONSTRUCTION VIEWS 3-1. Indoor Unit Front panel Air filter Air inlet Heat exchanger Back body Air outlet Knock out system Knock out system Hanger Connecting pipe (0.43m) Drain hose (0.54m) (Flare 6.35) Hanger Connecting pipe (0.33m) Flare 9.52 For stud bolt...

  • Page 15: Outdoor Unit

    FILE NO. SVM-03008 3-2. Outdoor Unit 32.5 A Detail drawing (Back Leg) B Detail drawing (Front Leg) 6 Hole 6 Hole 11 x 14 Hole R5.5 30 Drain outlet 2- 11 x 14 Hole (For 8- 10 anchor bolt) FAN GUARD COVER PV Electrical part cover...

  • Page 16: Wiring Diagram

    FILE NO. SVM-03008 4. WIRING DIAGRAM 4-1. Indoor Unit Table 4-1-1 Simple Check for Failure Diagnosis Check Item Diagnosis Result Check to see if the OPERATION indicator goes on and off when the main OPERATION switch or breaker is turned on. INDICATOR (Check the primary and secondary voltage of the transformer.) Check the power supply voltage between 1 and 2.

  • Page 17: Outdoor Unit

    FILE NO. SVM-03008 4-2. Outdoor Unit P.C. BOARD (MCC-813) – 16 –...

  • Page 18: Specification Of Electrical Parts

    FILE NO. SVM-03008 5. SPECIFICATION OF ELECTRICAL PARTS 5-1. Indoor Unit Parts name Type Specifications Fan motor (for indoor) ICF-340-30-2 DC 340 V, 30 W Thermo. sensor (TA-sensor) ——— 10 k at 25 C DC-DC transformer (T01) SWT-70 DC 390 V, Secondary DC 15 V, 12 V, 7 V Microcomputer PD780024AGK Heat exchanger sensor...

  • Page 19: Refrigerant Cycle Diagram

    FILE NO. SVM-03008 6. REFRIGERANT CYCLE DIAGRAM 6-1. Refrigerant Cycle Diagram Temp. measurement INDOOR UNIT Indoor heat exchanger Cross flow fan Pressure measurement Max. : 15 m Deoxidized copper pipe Gauge attaching port Outer dia. : 6.35 mm Vacuum pump connecting port Thickness : 0.8 mm Sectional shape Deoxidized copper pipe...

  • Page 20: Operation Data

    FILE NO. SVM-03008 6-2. Operation Data <Cooling> Temperature Heat exchanger Standard Indoor Outdoor Compressor Model condition ( C) pipe temp. pressure revolution name P (MPa) mode mode (rps) Indoor Outdoor T1 ( C) T2 ( C) 27/19 35/– 13UKV-E2 0.8 to 1.0 9 to 11 49 to 45 High...

  • Page 21: Control Block Diagram

    FILE NO. SVM-03008 7. CONTROL BLOCK DIAGRAM 7-1. Indoor Unit Indoor Unit Control Panel M.C.U Functions Operation Heat Exchanger Sensor Louver Control Display Timer Temperature Sensor 3-minute Delay at Restart for Compressor Display Filter Motor Revolution Control Infrared Rays Signal Receiver Sign Display PRE DEF.

  • Page 22: Outdoor Unit (Inverter Assembly)

    FILE NO. SVM-03008 7-2. Outdoor Unit (Inverter Assembly) – 21 –...

  • Page 23: Operation Description

    FILE NO. SVM-03008 8. OPERATION DESCRIPTION (1) Role of indoor unit controller 8-1. Outlined of Air Conditioner Control The indoor unit controller judges the operation This air conditioner is a capacity-variable type air commands from the remote controller and conditioner, which uses DC motor for the indoor fan assumes the following functions.
  • Page 24 FILE NO. SVM-03008 (3) Contents of operation command signal (Serial 8-1-1. Capacity control signal) from indoor unit controller to outdoor unit The cooling and heating capacity is varied by changing controller compressor motor speed. The inverter changes The following three types of signals are sent from compressor motor speed by changing the indoor unit controller.
  • Page 25 FILE NO. SVM-03008 8-1-4. Prevent-freezing control 8-1.7. Indoor fan control (DC fan motor) The indoor heat exchanger sensor detects refrigerant (1) The indoor fan is operated by the stepless speed vapor temperature in COOL/DRY operation. If the change DC motor. temperature is below the specified value, compressor (2) For air flow level, speed of the indoor fan motor is motor speed is reduced so that operation is performed...
  • Page 26 FILE NO. SVM-03008 8-1-8. Outdoor fan control (DC fan motor) Although the outdoor fan motor drives the outdoor fan by non-step variable system of the revolution speed, the revolution speed is restricted to three steps on the convenience of controlling. If a strong wind is lashing outside of the room, the operation may be continued as the outdoor fan stops in order to protect the outdoor fan motor.

  • Page 27: Description Of Operation Circuit

    FILE NO. SVM-03008 (1) Cooling capacity control 8-2. Description of Operation Circuit The cooling capacity and room temperature Turning [ON] the breaker flashes the operation are controller by changing the compressor lamp. (1Hz) motor speed according to both the difference This is the display of power-ON (or notification of between the temperature detected by the room power failure).
  • Page 28 FILE NO. SVM-03008 (4) Limit for maximum compressor motor speed 6) Control 6 (F zone) : Operation stop zone by indoor fan speed If TD detect value exceeds 117 C during When outdoor temperature sensor detected 32 C operation, stop the operation immediately. or lower, and indoor heat exchanger sensor Then, restart the operation when TD detect detected 17 C or lower, the maximum compressor...
  • Page 29 FILE NO. SVM-03008 8-2-2. DRY operation [Basic control] (The Remote Control MODE Button is Set to the DRY Position) temp. Once the setting is made, the operation mode is memorized in the microcomputer so that the same operation can be effected thereafter simply by pushing [START/STOP] button.
  • Page 30 FILE NO. SVM-03008 [In starting and in stability] In starting In stability 9.8A 16.0 Until 12 minutes When 12 to 25 15.5 passed after minutes passed operation start after operation 10.3A 11.0 When 12 to 25 start and room 10.5 minutes passed temp.
  • Page 31 FILE NO. SVM-03008 2) Defrost operation 8-2-4. Automatic operation Operation of the compressor is stopped once, (1) As shown in Fig. 8-2-9, the operation mode turn off power coupler for 4-way valves after (COOL, DRY, HEAT) is selected according to the 10 seconds, and then exchange the 4-way outside temperature and room temperature when valves.

  • Page 32: Temporary Operation

    FILE NO. SVM-03008 8-3. Temporary Operation Temporary Auto operation, existence of Auto Restart, and Temporary Cooling operation can be set by the TEMPORARY button of the indoor controller. TEMPORARY button TEMPORARY button Fig. 8-3-1 Table 8-3-1 TEMPORARY button Control Temporary Auto operation start After pushing button Auto Restart for 3 seconds...

  • Page 33: Auto Restart Function

    FILE NO. SVM-03008 8-4-1. How to set auto restart function 8-4. Auto Restart Function To set the auto restart function, proceed as follows: The indoor unit is equipped with an automatic The power supply to the unit must be on; the function restarting function which allows the unit to restart will not set if the power is off.

  • Page 34: Filter Check Lamp

    FILE NO. SVM-03008 8-4-2. How to cancel auto restart function To cancel auto restart function, proceed as follows: Repeat the setting procedure: the unit receives the signal and beeps three times. The unit will be required to be turned on with the remote control after the main power supply is turned off.

  • Page 35: Remote Control And Its Functions

    FILE NO. SVM-03008 $ Memory button (MEMO) 8-6. Remote Control and its Functions Keep pushing the MEMO button for 2 seconds 8-6-1. Parts name of remote control from the beginning, or keep pushing the button for 2 seconds after pushing it once for a short time. 1 Infrared signal emitter Then the set data is stored in the memory and Transmits a signal to the indoor unit.
  • Page 36 FILE NO. SVM-03008 6 TIMER and clock time display 8-6-2. Names and functions of indications on remote control The time set for timer operation or clock time is indicated. [Display] The present time is always indicated except for All indications, except for clock time indication, are TIMER operation.

  • Page 37: Hi Power Mode ([Hi Power] Button On The Remote Control Is Pushed.)

    FILE NO. SVM-03008 8-7. Hi POWER Mode ([Hi POWER] button on the remote control is pushed.) When [Hi POWER] button is pushed while the indoor unit is in Auto, Cooling or Heating operation, Hi POWER mark is indicated on the display of the remote control and the unit operates as follows.

  • Page 38: Installation Procedure

    FILE NO. SVM-03008 9. INSTALLATION PROCEDURE 9-1. Safety Cautions For general public use Power supply cord of parts of appliance for outdoor use shall be at least polychloroprene sheathed flexible cord (design H07RN-F), or cord designation 245 IEC66. (1.5 mm or more) CAUTION New Refrigerant Air conditioner Installation...
  • Page 39 Also, make sure the equipment is properly earthed. Appliance shall be installed in accordance with national wiring regulations. If you detect any damage, do not install the unit. Contact your TOSHIBA dealer immediately. CAUTION Exposure of unit to water or other moisture before installation could result in electric shock.
  • Page 40 FILE NO. SVM-03008 9-1-1. 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 lift the indoor unit for better operation. Do not allow the drain hose to get slack.
  • Page 41 FILE NO. SVM-03008 9-1-2. Optional installation parts Part Parts name Q’ty Code Refrigerant piping Liquid side : 6.35 mm each Gas side 9.52 mm Pipe insulating material (polyethylene foam, 6 mm thick) Putty, PVC tapes each <Fixing bolt arrangement of outdoor unit> Suction side Drain hole Diffuser...
  • Page 42 FILE NO. SVM-03008 9-1-3. 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 Mounting screw 4 x 25 s x 6 Flat head wood screw Wireless remote control x 1 Zeolite filter x 1 3.1 x 16 s x 2...
  • Page 43 FILE NO. SVM-03008 9-1-4. 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 44: Indoor Unit

    FILE NO. SVM-03008 9-2-2. Cutting a hole and mounting installation 9-2. Indoor Unit plate 9-2-1. 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 above diagram. A place where there is no obstacle near the air inlet and outlet.
  • Page 45 FILE NO. SVM-03008 <When the installation plate is directly mounted on 9-2-3. Electrical work the wall> 1. The supply voltage must be the same as the rated 1. Securely fit the installation plate onto the wall by voltage of the air conditioner. screwing it in the upper and lower parts to hook up 2.
  • Page 46 FILE NO. SVM-03008 9-2-4. Wiring connection 9-2-5. Piping and drain hose installation <How to connect the connecting cable> <Piping and Drain Hose Forming> Wiring of the connecting cable can be carried out * Since dewing results in a machine trouble, make without removing of the front panel.
  • Page 47 FILE NO. SVM-03008 <How to fix the Drains Cap> <Left-hand connection with piping> 1) Insert hexagonal wrench ( 4 mm) in a center head. Bend the connecting pipe so that it is laid within 43 mm above the wall surface. If the connecting pipe is laid exceeding 43 mm above the wall surface, the indoor unit may unstably be set on the wall.
  • Page 48 FILE NO. SVM-03008 9-2-6. Indoor unit fixing 2. Put water in the drain pan and make sure that the water is drained out of doors. 1. Pass the pipe through the hole in the wall, and hook 3. When connecting extension drain hose, insulate the the indoor unit on the installation plate at the upper connecting part of extension drain hose with shield hooks.

  • Page 49: Outdoor Unit

    FILE NO. SVM-03008 9-3-2. Refrigerant piping connection 9-3. Outdoor Unit <Flaring> 9-3-1. Installation place 1. Cut the pipe with a pipe cutter. 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 Roughness Obliquity Warp...
  • Page 50 FILE NO. SVM-03008 (Unit : N·m) 9-3-3. Evacuating Outer dia. After the piping has been connected to the indoor unit, Tightening torque you can perform the air purge together at once. of copper pipe 6.35 mm 16 to 18 (1.6 to 1.8 kgf·m) AIR PURGE Evacuate the air in the connecting pipes and in the 9.52 mm...
  • Page 51 FILE NO. SVM-03008 <Packed valve handling precautions> <Stripping length of connection cable> Open the valve stem all the way out; but do not try Terminal block 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...
  • Page 52 FILE NO. SVM-03008 9-3-5. Gas leak test 9-3-7. Auto restart setting This product is designed so that, after a power failure, Check places for it can restart automatically in the same operating mode indoor unit (Flare as before the power failure. nut connection) Valve cover Information...

  • Page 53: How To Diagnose The Trouble

    FILE NO. SVM-03008 10. HOW TO DIAGNOSE THE TROUBLE The pulse modulating circuits are mounted to both NOTE: indoor and outdoor units. Therefore, diagnose troubles A large-capacity electrolytic capacitor is used in the according to the diagnosis procedure as described outdoor unit control (inverter).

  • Page 54: Primary Judgment

    FILE NO. SVM-03008 10-1-3. 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 55: Judgment By Flashing Led Of Indoor Unit

    FILE NO. SVM-03008 10-3. 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. Table 10-3-1 Check Item...

  • Page 56: Self-Diagnosis By Remote Control (Check Code)

    FILE NO. SVM-03008 10-4. Self-Diagnosis by Remote Control (Check Code) (1) If the lamps are indicated as shown B to H in Table 10-3-1, excute the self-diagnosis by the remote control. (2) When the remote control is set to the service mode, the indoor control diagnoses the operation condition and indicate the information of the self-diagnosis on the display of the remote control...

  • Page 57: Check Codes

    FILE NO. SVM-03008 10-4-2. Caution at servicing (1) After servicing, push the START/STOP 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.
  • Page 58 FILE NO. SVM-03008 Block distinction Operation of diagnosis function Judgment and action Check Check Air conditioner Block Cause of operation Remarks code code status Displayed when Ondoor Inverter over-current All off Even if trying operation again, all P .C. protective circuit operates. error is detected.

  • Page 59: Judgment Of Trouble By Every Symptom

    FILE NO. SVM-03008 10-5. Judgment of Trouble by Every Symptom 10-5-1. Indoor unit (Including remote contro) (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 60 FILE NO. SVM-03008 (2) Power is not turned on though Indoor P.C. board is replaced <Confirmation procedure> Turn on power supply. Does operation Is wired connectly to white and black Correct wirng. lamp flash? lead wires of terminal block? To item of Power supply is not turned on .
  • Page 61 FILE NO. SVM-03008 (3) Only indoor fan motor does not operate. <Primary check> (1) Is it possible to detect the power supply voltage (200 – 240 V) between 1 and 2 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 5 minutes after it is turned on, to prevent a cold air from blowing in.) Turn off power...
  • Page 62 FILE NO. SVM-03008 (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 63 FILE NO. SVM-03008 (5) Troubleshooting for remote control The unit does not beep at all. Press START/STOP OPERATION lamp on button. indoor unit is not indicated. Is transmission mark indicated? Press RESET button on remote control Is receiver on with tip of pencil. indoor unit exposed to direct sunlight? Does indoor unit...
  • Page 64 FILE NO. SVM-03008 10-5-2. 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 65: Check Code 1C (Miswiring In Indoor/Outdoor Units) And 1E

    FILE NO. SVM-03008 10-6. 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 modulation valve Set it correctly.

  • Page 66: How To Diagnose Trouble In Outdoor Unit

    FILE NO. SVM-03008 10-7. How to Diagnose Trouble in Outdoor Unit 10-7-1. Summarized inner diagnosis of inverter assembly Table 10-7-1 Diagnosis/Process flowchart Item Contents Summary Preparation Turn “OFF” the power Remove breaker, and remove 3P connector of compressor. connector which connects inverter and compressor.

  • Page 67: How To Check Simply The Main Parts

    FILE NO. SVM-03008 Diagnosis/Process flowchart Item Contents Summary Check Check winding resistance between phases of compressor, and resistance between outdoor frames by using a tester. Check Is not grounded. OK if 10M or more winding of compressor. Is not short-circuited OK if 0.51 0.57 between windings.
  • Page 68 FILE NO. SVM-03008 (3) Check procedures Table 10-8-1 Procedure Check points (Symptom) Causes Turn off the power supply and Check whether or not the fuse (F01) Impulse voltage was applied or the remove the P.C. board assembly is blown. indoor fan motor short-circuited. from electronic parts base.
  • Page 69 FILE NO. SVM-03008 10-8-2. P.C. board layout +12V Bottom View (For the Top View, refer to page 65.) [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.
  • Page 70 FILE NO. SVM-03008 10-8-3. 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 (k ) 20.7 12.6 10.0...
  • Page 71 FILE NO. SVM-03008 10-8-5. 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 72: How To Simply Judge Whether Outdoor Fan Motor Is Good Or Bad

    FILE NO. SVM-03008 10-9. 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 73: How To Replace The Main Parts

    FILE NO. SVM-03008 11. HOW TO REPLACE THE MAIN PARTS 11-1. Indoor Unit Part name Procedures Remarks Front panel How to remove the front panel 1) Stop 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.
  • Page 74 FILE NO. SVM-03008 Part name Procedures Remarks Heat exchanger 1) Remove the front panel, electrical part and the horizontal louver with the procedure 3. 2) Remove the pipe holder on the rear side of the main unit. 3) Remove 2 screws of the heat exchanger on the base bearing side.
  • Page 75 FILE NO. SVM-03008 Part name Procedures Remarks Cross flow fan 1) Remove the front panel, electrical part, horizontal louver and the heat exchanger with 2 2-Screws (R) the procedure 4. 2) Remove 2 screws of the band motor (L) and other 2 screws of the band motor (R) and then remove the cross flow fan.

  • Page 76: Microcomputer

    FILE NO. SVM-03008 11-2. Microcomputer Part name Procedures Remarks Common 1) Turn the power supply off to stop the operation Replace the thermal fuse, terminal procedure of air conditioner. block, microcomputer ass’y and the 2) Remove the front panel. P.C. board ass’y Remove the 4 fixing screws.

  • Page 77: Outdoor Unit

    FILE NO. SVM-03008 11-3. Outdoor Unit Part name Procedures Remarks 1. Detachment Common Upper cabinet 1) Stop operation of the air conditioner, and turn off procedure Wiring cover the main switch of the breaker for the air conditioner. 2) Remove the valve cover. (ST1T 4 x 10s 1 pc.) Valve cover After removing screw, remove the valve cover pulling it downward.
  • Page 78 FILE NO. SVM-03008 Part name Procedures Remarks 1) Perform work of item 1 of 1. Inverter Inverter cover assembly 2) Remove screw (ST1T 4 x 10s 2 pc.) of the P. C. board upper part of the front cabinet. (Soldered surface) If removing the inverter cover in this condition, P.C.
  • Page 79 FILE NO. SVM-03008 Part name Procedures Remarks Control board 1) Disconnect lead wires and connectors assembly connected from the control board CN701 CN703 CN602 CN301 assembly to other parts. CN500 1. Lead wires CN603 Connection with terminal block : 3 wires (Black, White, Orange) CN601 CN600 CN300...
  • Page 80 FILE NO. SVM-03008 Part name Procedures Remarks 1) Perform work of item 1 of 1 and 2. Fan motor Fan motor 2) Remove the flange nut fixing the fan motor and the propeller fan. Propeller fan Flange nut is loosened by turning clockwise. (To tighten the flange nut, turn counterclock- wise.) 3) Remove the propeller fan.
  • Page 81 FILE NO. SVM-03008 Part name Procedures Remarks Pulse modulating 1. Detachment 1) Perform work of item 1 of 1, and 2, 3, 5. valve coil 2) Turn the coil clockwise (counterclockwise) by 90 degrees, and remove coil from the pulse modulating valve.
  • Page 82 FILE NO. SVM-03008 Part name Procedures Remarks " Replacement of 1) Cut the sensor 100 mm longer than old one. Cutting here Thermal temperature 2) Cut the protective tube after pulling out it sensor part Connector sensor for (200 mm). servicing only 3) Move the protective tube toward the thermal sensor side and tear the tip of lead wire in two,...
  • Page 83 FILE NO. SVM-03008 <P.C. board layout> MCC-813 – 82 –...

  • Page 84: Exploded Views And Parts List

    FILE NO. SVM-03008 12. EXPLODED VIEWS AND PARTS LIST 12-1. Indoor Unit (E-Parts Assy) Location Part Location Part Description Description 43T69319 Temperature Sensor, TC 10k 25 C 43T62003 Cord Clamp 43T60001 Terminal, 2P AC300V, 20A 43169079 P.C. Board ASSY, WRS-LED 43T69320 Temperature Sensor, TA 10k 25 C 43T69322 P.C.

  • Page 85: Indoor Unit

    FILE NO. SVM-03008 12-2. Indoor Unit Electric Parts Assembly Location Part Location Part Description Description 43T00366 Front Panel Assy 43T79302 Guide Drain 43T09316 Inlet Grille Assy 43T22002 Bearing 43T03302 Back Body Assy 43T39301 Base, Bearing 43T80301 Air Filter 43T20302 Cross Flow Fan 43T09309 Horizontal Louver 43T39302 Band Motor-L 43T08350 LED Panel Assy...

  • Page 86: Outdoor Unit

    FILE NO. SVM-03008 12-3. Outdoor Unit Location Part Location Part Description Description 43T00377 Cabinet, Front, Assy 43T46326 Body-PMV 43T00381 Cabinet, Back, Assy 43T63305 Coil-PMV 43T42304 Base, Assy 43T58303 Reactor 43T00380 Cabinet, Upper, Assy 43T54304 Thermostat, Bimetal 43T09318 Guard, Fan 43T63005 Holder, Thermostat, Bimetal 43T52310 Cover, Packed Valve 43T20307 Fan, Propeller 43T62311 Cover, Wiring, Assy...

  • Page 87: Outdoor Unit (E-Parts Assy)

    FILE NO. SVM-03008 12-4. Outdoor Unit (E-Parts Assy) TE Sensor ( 6) TS Sensor ( 6) TO Sensor ( 6) TD Sensor ( 4) Location Part Location Part Description Description 43T62312 Heatsink 43T50305 Temperature Sensor 43T69345 P.C. Board 43T50304 Temperature Sensor 43T60027 Terminal 6P 43T62313 Base-Plate-P.C.
  • Page 88 FILE NO. SVM-03008 TOSHIBA CARRIER CORPORATION – 87 –...

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