Toshiba RAS-167SKV-E5 Service Manual
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Toshiba RAS-167SKV-E5 Service Manual

Split type high wall, heat pump type
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See also: Technical Handbook
FILE NO. SVM-13027

SERVICE MANUAL

SPLIT TYPE
Indoor Unit
Outdoor Unit
<High Wall, Heat Pump Type>
<Heat Pump Type>
RAS-167SKV-E5
RAS-167SAV-E5
RAS-16EKV-EE
RAS-16EAV-EE
R410A
March, 2013

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Summary of Contents for Toshiba RAS-167SKV-E5

  • Page 1: Service Manual

    FILE NO. SVM-13027 SERVICE MANUAL SPLIT TYPE Indoor Unit Outdoor Unit <High Wall, Heat Pump Type> <Heat Pump Type> RAS-167SKV-E5 RAS-167SAV-E5 RAS-16EKV-EE RAS-16EAV-EE R410A March, 2013...

  • Page 2: Table Of Contents

    FILE NO. SVM-13027 CONTENTS 1. SAFETY PRECAUTIONS ................3 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-13027 1. SAFETY PRECAUTIONS For general public use Power supply cord of outdoor unit shall be more than 1.5 mm (H07RN-F or 60245IEC66) polychloroprene 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 FILE NO. SVM-13027 • 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

    FILE NO. SVM-13027 2. SPECIFICATIONS RAS-167SKV-E5 RAS-16EKV-EE Unit model Indoor RAS-167SAV-E5 RAS-16EAV-EE Outdoor Cooling capacity (kW) 11.1-5.0 1.1-5.0 Cooling capacity range (kW) Heating capacity (kW) 1.0-6.2 1.0-6.2 Heating capacity range (kW) 1Ph/50Hz/220-240V, 1 Ph/60Hz/230V Power supply Electric Indoor Operation mode...

  • Page 6: Operation Characteristic Curve

    Compressor Speed (rps) Compressor Speed (rps) 2-4. Capacity Variation Ratio According to Temperature <Heating> <Cooling> RAS-167SKV-E5 RAS-16EKV-EE RAS-167SKV-E5 RAS-16EKV-EE Capacity ratio : 100% = 5.2kW (RAS-167SKV-E5) 5.2kW (RAS-16EKV-EE Capacity ratio:100%= Conditions 4.5kW(RAS-167SKV-E5) Indoor:DB27℃/WB19℃ 4.5kW(RAS-16EKV-EE) Indoor air flow:High Condition Pipe length:5m Indoor:DB20℃...

  • Page 7: Refrigerant R410A

    FILE NO. SVM-13027 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 8 FILE NO. SVM-13027 Table 3-2-1 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 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 FILE NO. SVM-13027 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 10 FILE NO. SVM-13027 Table 3-2-6 Flare and flare nut dimensions for R22 Dimension (mm) Nominal Outer diameter Thickness Flare nut width diameter (mm) (mm) (mm) 6.35 9.52 13.0 13.5 12.70 16.2 16.0 12.9 15.88 19.7 19.0 16.0 19.05 23.3 24.0 19.2 Fig.

  • Page 11: Specifications

    FILE NO. SVM-13027 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

    FILE NO. SVM-13027 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 13: Brazing Of Pipes

    FILE NO. SVM-13027 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 FILE NO. SVM-13027 3-5-3. Brazing 2. Characteristics required for flux • Activated temperature of flux coincides with the As brazing work requires sophisticated techniques, brazing temperature. experiences based upon a theoretical knowledge, it must be performed by a person qualified. •...

  • Page 15: Construction Views

    FILE NO. SVM-13027 4. CONSTRUCTION VIEWS 4-1. Indoor Unit Air filter Air inlet Front panel Heat exchanger Knock out system Knock out system Installation plate hanger 17.5 Wireless remote controller 64.5 Installation plate hanger Drain hose (0.50m) Connecting pipe (0.35m) Connecting pipe (0.40m) Remote controller holder (Flare...

  • Page 16: Outdoor Unit

    FILE NO. SVM-13027 4-2. Outdoor Unit Ø6 hole R5.5 Ø6 hole Ø11x14 hole A detail Drawing (Back leg) Ø 11 x 14 Hole Ø 25 Drain outlet B Detail Drawing (Front leg) (For 8 - 10 anchor bolt) Ø Ø FAN-GUARD Ø...

  • Page 17: Wiring Diagram

    FILE NO. SVM-13027 5. WIRING DIAGRAM COMPRESSOR CN300 Q200~205 Q300~305 IGBT MOS-FET P.C.BOARD (MCC-5009) R221 R321 FAN MOTOR R220 R320 CN700 R219 R319 PULSE MOTOR VALVE FUSE VARISTOR T3.15A AC250V DB01 CN603 SURGE (SUCTION PIPE TEMP. SENSOR) ABSORBER CN602 POWER VARISTOR RELAY (OUTDOOR...

  • Page 18: Specifications Of Electrical Parts

    FILE NO. SVM-13027 6. SPECIFICATIONS OF ELECTRICAL PARTS 6-1. Indoor Unit Parts name Type Specifications DC 340V, 30W ICE-340-30-4 Fan motor (for indoor) Room temp. sensor (TA-sensor) ( - ) 10kΩ at 25°C Heat exchanger temp. sensor (TC-sensor) ( - ) 10kΩ...

  • Page 19: Refrigerant Cycle Diagram

    FILE NO. SVM-13027 7. REFRIGERANT CYCLE DIAGRAM Temp. measurement INDOOR UNIT Indoor heat exchanger Cross flow fan Max. : 20m Min. : 2m Pressure measurement Chargeless : 15m Deoxidized copper pipe Gauge attaching port Charge : 20g/m Outer dia. : 6.35mm Vacuum pump connecting port (16 to 20m) Thickness : 0.8mm...

  • Page 20: Operation Data

    FILE NO. SVM-13027 7-2. Operation Data <Cooling> Tempeature Model name Standard Heat exchanger Indoor Outdoor Compressor condition(°C) RAS- pressure pipe temp. fan mode fan mode revolution Indoor Outdoor P (MPa) T1 (°C) T2 (°C) (rps) 167SKV-E5 27/19 35/- 0.7 to 0.9 10 to 12 40to 42 High...

  • Page 21: Control Block Diagram

    FILE NO. SVM-13027 8. CONTROL BLOCK DIAGRAM 8-1. Indoor Unit Indoor Unit Control Unit M.C.U. Louver Functions Motor Heat Exchanger Sensor (Tc) • Cold draft preventing Function Room Temperature Sensor (Ta) Louver Motor • 3-minute Delay at Restart for Compressor Drive Control Infrared Rays Signal Receiver •...
  • Page 22 FILE NO. SVM-13027 8-2. Outdoor Unit (Inverter Assembly) – 22 –...

  • Page 23: Operation Description

    FILE NO. SVM-13027 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 AC or DC motor for the indoor to IGBT module (Compressor stop function) for motor and the outdoor fan motor.

  • Page 24: Installation Procedure

    FILE NO. SVM-13027 9-2. Operation Description 1. Basic operation ......................25 1. Operation control ....................25 2. Cooling/Heating operation ..................26 ..................... 26 3. AUTO operation 4. DRY operation ......................26 2. Indoor fan motor control ..................... 28 3. Outdoor fan motor control ................... 29 4.

  • Page 25: Basic Operation

    FILE NO. SVM-13027 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 26: Cooling/Heating Operation

    FILE NO. SVM-13027 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 form the indoor controller to the outdoor unit.
  • Page 27 *5 : Fan speed = (M + –L) x 1/4 + L +1.0 +0.5 (Linear approximation L(W6) from M+ and L) (Table 1) Indoor fan air flow rate RAS-167SKV-E5 RAS-16EKV-EE Fan speed COOL HEAT Fan speed Air flow rate Fan speed...

  • Page 28: Indoor Fan Motor Control

    FILE NO. SVM-13027 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 29: Outdoor Fan Motor Control

    FILE NO. SVM-13027 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 30: Capacity Control

    FILE NO. SVM-13027 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 31: Release Protective Control By Temperature Of Indoor Heat Exchanger

    FILE NO. SVM-13027 Item Operation flow and applicable data, etc. Description 6. Release protective <In cooling/dry operation> 1) When temperature of the indoor control by tempera- heat exchanger drops below 5°C, (Prevent-freezing control for indoor heat exchanger) ture of indoor heat the compressor speed is In cooling/dry operation, the sensor of indoor heat exchanger...

  • Page 32: Defrost Control (Only In Heating Operation)

    FILE NO. SVM-13027 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 33: Louver Control

    FILE NO. SVM-13027 Item Operation flow and applicable data, etc. Description 8. Louver control This function controls the air direction of the indoor unit. • The position is automatically controlled according to the operation 1) Louver 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 34: Eco Operation

    FILE NO. SVM-13027 Item Operation flow and applicable data, etc. Description 9. ECO When pressing [ECO] button on the remote controller, a <Cooling operation> operation Economic operation is performed. 1) The control target temperature <Cooling operation> increase 0.5ºC per hour up to 2ºC This function operates the air conditioner with the difference starting from the set temperature between the set and the room temperature as shown in the...

  • Page 35: Temporary Operation

    FILE NO. SVM-13027 Item Operation flow and applicable data, etc. Description 10. Temporary Pressing [RESET] button starts the temporary opera- 1) When pressing [RESET] button, the operation tion of [AUTO] operation. When keeping [RESET] temporary [AUTO] operation starts. button pressed for 10 seconds or more, the temporary 2) When keeping [RESET] button pressed [COOL] operation is performed.

  • Page 36: Pulse Modulating Valve (P .M.v.) Control

    FILE NO. SVM-13027 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 37: Self-Cleaning Function

    FILE NO. SVM-13027 Item Operation flow and applicable data, etc. Description 13. Self-Cleaning 1. Purpose function The Self-Cleaning operation is to minimize the growth of mold, bacteria etc. by running the fan and drying so as to keep the inside of the air conditioner clean. Unit now performing cooling or dry operation Self-Cleaning operation When the cooling or dry operation shuts...

  • Page 38: Remote-A Or B Selection

    FILE NO. SVM-13027 Item Operation flow and applicable data, etc. Description • Self-Cleaning diagram 13. Self-Cleaning function Operation display FCU fan rpm is depend on presetting. (500RPM) FCU louver OPEN OPEN (12.7º) CLOSE ON or OFF ON or OFF Timer display depend on presetting of timer function.

  • Page 39: Hi-Power Mode

    FILE NO. SVM-13027 Item Operation flow and applicable data, etc. Description 15. 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 40: Auto Restart Function

    FILE NO. SVM-13027 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.

  • Page 41: How To Cancel The Auto Restart Function

    FILE NO. SVM-13027 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 42: Parts Name Of Remote Contr Oller

    FILE NO. SVM-13027 9-4. Remote control 9-4-1. Function of Push Button Infrared signal emitter Start/Stop button Mode select button (MODE) Temperature button (TEMP) Fan speed button (FAN) Swing louver button (SWING) Set louver button (FIX) Off timer button (OFF) High power button (Hi-POWER) Economy button (ECO) Clear button (CLEAR) Check button (CHECK)
  • Page 43 FILE NO. SVM-13027 5. ECO OPERATION To automatically control room to save energy (except in DRY and FAN ONLY mode) Press : Start and stop the operation. Note: Cooling operation; the set temperature will increase automatically 1 degree/ hour for 2 hours (maximum 2 degrees increase). For heating operation the set temperature will decrease.

  • Page 44: Name And Functions Of Indications On Remote Controller

    FILE NO. SVM-13027 9-4-3. Name and Functions of Indications on Remote Controller [Display] All indications, except for the clock time indicator, are displayed by pressing the button. . FAN speed indicator Transmission mark Indicates the selected fan speed. This transmission mark indicates when the remote controller transmits signals to the indoor AUTO or five fan speed levels...
  • Page 45 FILE NO. SVM-13027 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 46 FILE NO. SVM-13027 10-2. Installation 10-1-2. 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, 6 mm thick) Putty, PVC tapes each <Fixing bolt arrangement of outdoor unit> 108 mm 125 mm Air inlet...
  • Page 47 FILE NO. SVM-13027 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 Mounting screw ∅4 x 25 s x 6 Cap water proof x 2 Flat head wood screw Battery x 2...
  • Page 48 FILE NO. SVM-13027 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 49: Indoor Unit

    FILE NO. SVM-13027 10-3-2. Cutting a hole and mounting installation 10-3. Indoor Unit plate 10-3-1. Installation place <Cutting a hole> • A place which provides the spaces around the When installing the refrigerant pipes from the rear. indoor unit as shown in the above diagram. •...
  • Page 50 FILE NO. SVM-13027 <When the installation plate is directly mounted on 10-3-3. 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 51 FILE NO. SVM-13027 10-3-4. Wiring connection 10-3-5. Piping and drain hose installation CAUTION <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 52 FILE NO. SVM-13027 <How to fix the Drain Cap> <Left-hand connection with piping> 1) Insert hexago 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 53 FILE NO. SVM-13027 10-3-6. Indoor unit fixing 10-3-7. Drainage 1. Pass the pipe through the hole in the wall, and hook 1. Run the drain hose sloped downwards. the indoor unit on the installation plate at the upper hooks. NOTE 2.
  • Page 54 FILE NO. SVM-13027 10-4. Outdoor Unit 4. Installation in the following places may result in trouble. 10-4-1. Installation place Do not install the unit in such places. • A place which provides the spaces around the • A place full of machine oil. outdoor unit as shown in the left diagram.
  • Page 55 FILE NO. SVM-13027 <Tightening connection> Align the centers of the connecting pipes and tighten the flare n ut as f ar as possib le with y our fingers Then Incused line tighten the n ut with a spanner and torque wrench as wn in the figure Half union Flare nut...
  • Page 56 FILE NO. SVM-13027 <Stripping length of connection cable> CAUTION • KEEP IMPORTANT 5 POINTS FOR PIPING WORK (1) Take away dust and moisture (Inside of the connecting pipes.) (2) Tight connection (between pipes and unit) (3) Evacuate the air in the connecting pipes using VACUUM PUMP.
  • Page 57 FILE NO. SVM-13027 10-5. Others NOTE : 1. Repeat above step to reset Remote Control to be A. 10-5-1. Gas leak test 2. Remote Control A has not "A" display. 3. Default setting of Remote Control from Check places for indoor unit (Flarenut factory is A.

  • Page 58: How To Diagnose The Trouble

    FILE NO. SVM-13027 11. HOW TO DIAGNOSE THE TROUBLE The pulse motor circuits are mounted to both indoor and outdoor units. Therefore, diagnose troubles according to the trouble diagnosis procedure as described below. (Refer to the check points in servicing written on the wiring diagrams attached to the indoor/outdoor units.) Table 11-1 Troubleshooting Procedure...
  • Page 59 FILE NO. SVM-13027 CAUTION A high voltage (equivalent to the supply voltage) is also energized to ground through the sensors, PMV and other low-voltage circuits. The sensor leads and other wires are covered with insulated tubes for protection. Nevertheless, care must be taken to ensure that these wires are not pinched.

  • Page 60: First Confirmation

    FILE NO. SVM-13027 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 61: Primary Judgment

    FILE NO. SVM-13027 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 62 FILE NO. SVM-13027 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 63 FILE NO. SVM-13027 11-4-2. Caution at Servicing 1. After servicing, press 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 64 FILE NO. SVM-13027 Block distinction Operation of diagnosis function Judgment and action Check Check Block Cause of operation conditioner Remarks code code status Outdoor P.C. Inverter over-current All off Displayed when Even if trying operation again, all board protective circuit error is detected.

  • Page 65: Judgment Of Trouble By Every Symptom

    FILE NO. SVM-13027 11-5. Judgment of Trouble by Every Symptom 11-5-1. Indoor Unit (Including Remote Controller) (1) Power is not turned on (Does not operate entirely) <Primary check> 1. Is the supply voltage normal? 2. Is the normal voltage provided to the outdoor unit? Operation 3.
  • Page 66 FILE NO. SVM-13027 (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 67 FILE NO. SVM-13027 (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 68 FILE NO. SVM-13027 (5) Troubleshooting for remote controller <Primary check> Check that A or B selected on the main unit is matched with A or B selected on the remote controller. There is no beep from the indoor unit Push the [ ] button.
  • Page 69 FILE NO. SVM-13027 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 70 FILE NO. SVM-13027 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 71: How To Diagnose Trouble In Outdoor Unit

    FILE NO. SVM-13027 11-7. How to Diagnose Trouble in Outdoor Unit 11-7-1. Summarized Inner Diagnosis of Inverter Assembly Table 11-7-1 Diagnosis/Process flowchart Item Contents Summary Preparation Turn “OFF” the power supply breaker, and remove 3P Remove connector connector which connects of compressor.

  • Page 72: How To Check Simply The Main Parts

    FILE NO. SVM-13027 Diagnosis/Process flowchart Item Contents Summary Check Check winding resistance between phases of compres- sor, and resistance between outdoor frames by using a tester. → OK if 10MΩ or more • Is not grounded. Replace control board assembly. ...
  • Page 73 FILE NO. SVM-13027 (3) Check procedures Table 11-8-1 Procedure Check points Causes Turn off the power supply breaker Check whether or not the fuse (F01) Impulse voltage was applied or the and remove the P.C. board is blown. indoor fan motor short-circuited. assembly from electronic parts base.
  • Page 74 FILE NO. SVM-13027 +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 75 FILE NO. SVM-13027 11-8-3. Indoor Unit (Other Parts) Part name Checking procedure Room temp. (TA) sensor Disconnect the connector and measure the resistance value with tester. Heat exchanger (TC) sensor (Normal temp.) Temperature 10°C 20°C 25°C 30°C 40°C Sensor TA, TC (kΩ) 20.7 12.6 10.0...
  • Page 76 FILE NO. SVM-13027 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 77: How To Simply Judge Whether Outdoor Fan Motor Is Good Or Bad

    FILE NO. SVM-13027 11-9. How to Simply Judge Whether Outdoor Fan Motor is Good or Bad 1. Symptom • Outdoor fan motor does not rotate. • Outdoor fan motor stops within several tens seconds though it started rotating. • Outdoor fan motor rotates or does not rotate according to the position where the fan stopped, etc. Remote controller check code “02 : Outdoor block, 1A : Outdoor fan drive system error”...

  • Page 78: How To Replace The Main Parts

    FILE NO. SVM-13027 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 79 FILE NO. SVM-13027 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. (2 pcs.) 6) Take off three hooks of panel from rear side.
  • Page 80 FILE NO. SVM-13027 Part name Procedures Remarks Electric parts 1) Follow the procedure up to 3) 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 81 FILE NO. SVM-13027 Part name Procedures Remarks Horizontal louver 1) Remove shaft of the horizontal ƒ 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 ƒ...
  • Page 82 FILE NO. SVM-13027 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 3) Remove the bearing base. <Caution at assembling> • If the bearing is out from the housing, push it into the specified position and then incorporate it in the main body.
  • Page 83 FILE NO. SVM-13027 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 84 FILE NO. SVM-13027 Part name Procedures Remarks ‡ Cross flow fan <Caution at reassembling> Fan motor D shaft Double point set screw 1) To incorporate the fan motor incorporate the motor into the position in the following figure, and then install the fan motor. •...

  • Page 85: Outdoor Unit

    FILE NO. SVM-13027 12-2. Outdoor Unit 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 86 FILE NO. SVM-13027 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 87 FILE NO. SVM-13027 Part name Procedure Remarks  ƒ Inverter 1) Perform work of item 1 in Inverter cover assembly 2) Remove screw (ST1TØ4 × 10L 2 pcs.) of the upper part of the front cabinet. P.C. board (Soldered surface) •...
  • Page 88 FILE NO. SVM-13027 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 CN603 • 3 leads (black, white, orange) connected to terminal block. CN601 CN600 CN701...
  • Page 89 FILE NO. SVM-13027 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 4 pcs.) used for securing the side cabinet to the bottom plate and valve fixing panel.
  • Page 90 FILE NO. SVM-13027 Part name Procedure Remarks  ‚ ƒ „ ‡ Compressor 1) Perform work of item 1 of … 2) Extract refrigerant gas. 3) Remove the partition board. (ST1TØ4 × 10L 3 pcs.) 4) Remove the sound-insulation material. 5) Remove terminal cover of the compressor, and disconnect lead wire of the compressor Partition...
  • Page 91 FILE NO. SVM-13027 Part name Procedure Remarks ‰ Electronic 1. Detachment expansion valve ‚ ƒ 1) Perform step 1 in , all the steps in 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 92 FILE NO. SVM-13027 Part name Procedure Remarks TE sensor (outdoor heat exchanging temperature sensor) • Attachment Arrow D Install the sensor onto the straight pipe part of the condenser output pipe. Detail B Detail C Detail A Detail C TS sensor (Suction pipe temperature sensor) •...
  • Page 93 FILE NO. SVM-13027 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 94: Exploded Views And Parts List

    FILE NO. SVM-13027 13. EXPLODED VIEWS AND PARTS LIST 13-1. Indoor Unit (E-Parts) Location Part Location Part Description Description 43T69319 TEMPERATURE SENSOR 43T62003 CORD CLAMP 43T60365 TERMINAL BLOCK; 3P 43T6V376 PC BOARD ASSY;WRS-LED 43T69320 TEMPERATURE SENSOR 43T6V387 PC BOARD – 94 –...
  • Page 95 FILE NO. SVM-13027 13-2. Indoor Unit Location Part Location Part Description Description 43T21442 STEPPING-MOTOR 43T39327 BEARING BASE 43T21410 MOTOR, FAN 43T39328 MOTOR BAND (LEFT) 43T22312 BEARING ASSY, MOLD 43T39329 MOTOR BAND (RIGHT) 43T70316 HOSE, DRAIN 43T09409 HORIZONTAL LOUVER 43T20328 CROSS FLOW FAN ASSEMBLY 43T79313 CAP, DRAIN 43T49359 PIPE, SHIELD 43T44507 REFRIGERANT CYCLE ASSEMBLY...
  • Page 96 FILE NO. SVM-13027 13-3. Outdoor Unit Location Part Location Part Description Description 43T00468 FRONT CABINET 43T63329 COIL PMV 43T00459 LEFT CABINET 43T58306 REACTOR 43T42327 BASE PLATE ASSEMBLY 43T20319 PROPELLER FAN 43T00452 UPPER CABINET 43T21375 FAN MOTOR 43T19329 FAN GUARD 43T47001 NUT FLANGE 43T19330 PACKED VALVE COVER 43T97001 NUT 43T62325 ELECTRIC PART COVER...
  • Page 97 FILE NO. SVM-13027 13-4. P.C. Board Layout Location Part Location Part Description Description 43T62320 HEATSINK 43T60377 TEMPERATURE SENSOR 43T69872 PC BOARD 43T50304 SENSOR;HEAT EXCHANGER 43T60392 TERMINAL-5P 43T62313 BASE-PLATE-PC 43T60326 FUSE – 97 –...
  • Page 98 TOSHIBA CARRIER (THAILAND) CO.,LTD.

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