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Toshiba RAS-M10GKCVP-E Service Manual
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Toshiba RAS-M10GKCVP-E Service Manual

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See also: Owner's Manual , Installation Manual
FILE NO. A05-014

SERVICE MANUAL

SPLIT TYPE
<Cooling OnlyType>
Indoor Unit
RAS-M10GKCVP-E
RAS-M13GKCVP-E
RAS-M16GKCVP-E
Outdoor Unit
RAS-3M23GACV-E
R410A
PRINTED IN JAPAN, Jan.,2006 ToMo

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Summary of Contents for Toshiba RAS-M10GKCVP-E

  • Page 1: Service Manual

    FILE NO. A05-014 SERVICE MANUAL SPLIT TYPE <Cooling OnlyType> Indoor Unit RAS-M10GKCVP-E RAS-M13GKCVP-E RAS-M16GKCVP-E Outdoor Unit RAS-3M23GACV-E R410A PRINTED IN JAPAN, Jan.,2006 ToMo...

  • Page 2: Table Of Contents

    CONTENTS 1. SAFETY PRECAUTIONS ................3 2. SPECIFICATIONS ..................5 3. REFRIGERANT R410A ................9 4. CONSTRUCTION VIEWS ................ 17 5. WIRING DIAGRAM .................. 19 6. SPECIFICATIONS OF ELECTRICAL PARTS ......... 21 7. REFRIGERANT CYCLE DIAGRAM ............22 8. CONTROL BLOCK DIAGRAM ..............24 9.

  • Page 3: Safety Precautions

    1. SAFETY PRECAUTIONS For general public use Power supply cord of outdoor unit shall be more than 1.5 mm ² (H07RN-F or 245IEC66) 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 • 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 RESISTORS, FURNACE, STOVES, ETC.

  • Page 5: Specifications

    Be sure to connect indoor units in two rooms or more. The contents noted in this service manual limit the indoor units to the RAS-B10GKVP-E, RAS-B13GKVP-E, RAS-B16GKVP-E, RAS-M10GKCVP-E, RAS-M13GKCVP-E and RAS-M16GKCVP-E. For other indoor units that can also be used in combination, see the service manual of each indoor unit.
  • Page 6 2-1. Specifications RAS-M10GKCVP-E, RAS-M13GKCVP-E, RAS-M16GKCVP-E / RAS-3M23GACV-E Indoor unit RAS-M10GKCVP-E, RAS-M13GKCVP-E, RAS-M16GKCVP-E Unit model Outdoor unit RAS-3M23GACV-E Cooling capacity (kW) Cooling capacity range (kW) 2.2 – 7.0 Power supply 220–240 V, 1 Ph, 50Hz / 220 V, 1 Ph, 60Hz...
  • Page 7 2-2. Specifications of Performance When Each Indoor Unit is Combined with Other Unit Power Cooling Power Operation Outdoor Indoor unit Unit capacity (kW) Operating supply capacity consumption current noise status (kW) (dB) 4.12 — — — — (1.4 to 3.2) (320 to 950) (2.08 to 5.08) 3.94...

  • Page 8: Operation Characteristic Curve

    2-2-1. Operation Characteristic Curve • Conditions Indoor : DB 27˚C/WB 19˚C Outdoor : DB 35˚C Air flow : High Pipe length : 5m × 3 3 units operating 220V 230V 240V 90 100 Inverter output frequency (rps) 2-2-2. Capacity Variation Ratio According to Temperature •...

  • Page 9: Refrigerant R410A

    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 is 1.6 times higher than conventional refrigerant...
  • Page 10 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 11 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 12 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. 3-2-2 Relations between flare nut and flare seal surface 2.
  • Page 13 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 14: 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. 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 15: 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 16 2. Characteristics required for flux 3-5-3. Brazing • Activated temperature of flux coincides with the As brazing work requires sophisticated techniques, brazing temperature. experiences based upon a theoretical knowledge, it must be performed by a person qualified. • Due to a wide effective temperature range, flux is hard to carbonize.

  • Page 17: Construction Views

    4. CONSTRUCTION VIEWS 4-1. Indoor Unit RAS-M10GKCVP-E RAS-M13GKCVP-E RAS-M16GKCVP-E Plasma pure filter Indoor heat exchanger Front panel Air filter Zeolite-plus filter Air ionizer Knockout system Knockout system 54.5 54.5 Remote controller holder Installation plate hanging section Wireless remote controller Drain hose Installation plate (Outside length:0.54m)

  • Page 18: Outdoor Unit

    4-2. Outdoor Unit RAS-3M23GACV-E A leg part Ø11 × 17 U-shape hole (For Ø8 to Ø10 anchor bolt) 8-Ø6 hole (For fixing outdoor unit) Ø11 × 17 long hole B leg part (For Ø8 to Ø10 anchor bolt) guard 115.5 Hanger Valve cover...

  • Page 19: Wiring Diagram

    To outdoor unit Color Identification WHITE BLACK BLUE BROWN ORANGE PURPUL YELLOW GRAY PINK GRN& GREEN& INDOOR 1 2 3 4 YELLOW TERMINAL BLOCK 1 2 3 4 Heat exchanger Ion electrode GRN & YEL 1 2 3 4 BLK WHI 1 2 3 4 CN22 CN23...
  • Page 20 5-2. Outdoor Unit Color Identification BLK : BLACK WHI : WHITE RAS-3M23GACV-E BLU : BLUE BRW : BROWN RED : RED ORN : ORANGE GRY : GRAY YEL : YELLOW PNK : PINK PUR : PURPLE GRN : GREEN NOTE IGBT : Insulated Gate Bipolar Transistor T03 CT...

  • Page 21: Specifications Of Electrical Parts

    6. SPECIFICATIONS OF ELECTRICAL PARTS 6-1. Indoor Unit RAS-M10GKCVP-E, RAS-M13GKCVP-E, RAS-M16GKCVP-E Parts name Type Specifications Fan motor (for indoor) MF-280-30-5R DC280–340V, 30W Room temp. sensor (TA-sensor) ( – ) 10kΩ at 25°C Heat exchanger temp. sensor (TC-sensor) ( – ) 10kΩ...

  • Page 22: Refrigerant Cycle Diagram

    C room B room C room B room exchanger Connecting pipe Cross flow fan Thickness : 0.8 mm Ø9.52 : RAS-M10GKCVP-E Per 1 unit RAS-M13GKCVP-E Max. : 20m Ø12.7 : Min. : 2m RAS-M16GKCVP-E Connecting pipe Thickness : 0.8 mm Total Ø6.35...

  • Page 23: Operation Data

    7-2. Operation Data <Cooling> RAS-M14GAV-E, RAS-M14GACV-E Temperature Surface temp. of No.of Standard Compressor Fan speed Combinations condition (°C) heat exchanger operating pressure revolution of indoor units units P (MPa) (rps) Indoor Outdoor T1 (°C) T2 (°C) Indoor Outdoor — — 0.92 High Med.

  • Page 24: Control Block Diagram

    8. CONTROL BLOCK DIAGRAM 8-1. Indoor Unit RAS-M10GKCVP-E, RAS-M13GKCVP-E, RAS-M16GKCVP-E 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...

  • Page 25: Outdoor Unit (Inverter Assembly)

    8-2. Outdoor Unit (Inverter Assembly) RAS-3M23GACV-E Outdoor air temp. Sensor Gas side pipe temp. Sensor Discharge temp. Sensor MCC-818 (SUB-P.C. B) M.C.U A unit • Inverter outdoor frequency control send/receive circuit • A/D converter function A unit P.M.V. • P.M.V. control B unit Driver send/receive...

  • Page 26: Operation Description

    9. OPERATION DESCRIPTION 9-1. Outline of Air Conditioner Control • Detection of inverter input current and current release operation This air conditioner is a capacity-variable type air • Over-current detection and prevention operation conditioner, which uses DC motor for the indoor fan to IGBT module (Compressor stop function) motor and the outdoor fan motor.
  • Page 27 9-2. Operation Description 9-2. 1. Basic operation ........................28 1. Operation control ....................... 28 2. Operating mode selection when performing 2-room operation .......... 29 3. Cooling operation ....................... 29 4. AUTO operation ......................... 30 5. DRY operation ........................30 2. Indoor fan motor control ......................31 <In cooling operation>...

  • Page 28: Basic Operation

    Item Operation flow and applicable data, etc. Description 1. Basic 1. Operation control operation Receiving the user’s operation condition setup, the opera- tion 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 29: Operating Mode Selection When Performing 2-Roomoperation

    Item Operation flow and applicable data, etc. Description 1. Basic 2. Operating mode selection when performing 2-roomoperation operation 1) The outdoor unit operating mode conforms to the instructions of the indoor unit that was pressed first. 2) When combined operation consisting of cooling (dry) and heating, fan (air purification) and heating, or cleaning operation and heating is performed, operation conforms to the instructions of the indoor unit that was pressed first as shown in the left table.

  • Page 30: Auto Operation

    Item Operation flow and applicable data, etc. Description 1. Basic 4. AUTO operation 1) Detects the room temperature (Ta) when operation the operation started. Selection of operation mode As shown in the following figure, the operation starts by 2) Selects an operation mode from Ta in selecting automatically the status of room temperature the left figure.

  • Page 31: Indoor Fan Motor Control

    *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-M10GKCVP-E RAS-M13GKCVP-E RAS-M16GKCVP-E COOL Fan speed Fan speed Air flow rate Fan speed...

  • Page 32: Outdoor Fan Motor Control

    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 indoor processed by the indoor unit unit, the controller of outdoor unit controls fan speed.

  • Page 33: Current Release Control

    Item Operation flow and applicable data, etc. Description 5. Current release This function prevents troubles on the electronic parts of 1) The input current of the outdoor control the compressor driving inverter. unit is detected in the inverter section of the outdoor unit. This function also controls drive circuit of the compressor speed so that electric power of the compressor drive circuit 2) According to the detected...

  • Page 34: Louver Control

    Item Operation flow and applicable data, etc. Description 7. Louver control This function controls the air direction of the indoor unit. 1) Louver • The position is automatically controlled according to the operation mode. 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. Description 8. ECO When pressing [ECO] button on the remote controller, a quiet operation and mild operation is performed by reducing the fan speed and the compressor speed. <Cooling operation> <Cooling operation> This function operates the air conditioner with the difference 1) The room temperature (Tao) at between the set and the room temperature as shown in the the start time of DRY operation is...

  • Page 36: Air Purifying Control

    Item Operation flow and applicable data, etc. Description 10. Air purifying This function generates nagative ion while cleaning control the air in the room. * When the previous operation was the If air purifier-ON signal is received while the air operation of air conditioner + air conditioner stops, the air purifier starts operation, and purifier, an operation of air conditioner...

  • Page 37: Air Purifying Control [Detection Of Abnormality]

    Item Operation flow and applicable data, etc. Description 10. Air purifying 1. Purpose control The air purifying control function is to [Detection of alert the user to trouble in the ionizing or abnormality] air purifying operation. 2. Description Trouble is determined to have occurred Purifying operation (indicated by the FILTER indicator) in the following four cases.

  • Page 38: Discharge Temperature Control

    Item Operation flow and applicable data, etc. Description 11. Discharge 1. Purpose temperature This function detects error on the control refrigerating cycle or error on the com- pressor, and performs protective control. 2. Operation Td value Control operation • Control of the compressor speed Judges as an error and stops the compressor.

  • Page 39: Clean Operation

    Item Operation flow and applicable data, etc. Description 13. Clean operation 1. Purpose The clean 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 Clean operation When the cooling or dry operation shuts...

  • Page 40: Clean Operation Release

    Item Operation flow and applicable data, etc. Description 14. Clean operation Setting the clean operation release release * J04 will be near the MCU so take Add J04 of the indoor P.C. board assembly. steps to ensure that it will not be * This cancels the auto restart function.

  • Page 41: Select Switch On Remote Controller

    Item Operation flow and applicable data, etc. Description 15. Select switch on 1. Purpose remote controller This operation is to operate only one indoor unit using one remote controller. 2. Description Press the operation button When operating one indoor unit in a on the remote controller.

  • 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: Remote Controller And Its Fuctions

    9-5. Remote Controller and Its Fuctions 9-5-1. Parts Name of Remote Controller Cancel button (CLR) Infrared signal emitter Press this button to cancel the ON timer and OFF Transmits signal to the indoor unit. timer. (A receiving beep is heard.) button High power button (Hi POWER) Press the button to start operation.

  • Page 45: Name And Functions Of Indications On Remote Controller

    9-5-2. Name and Functions of Indications on Remote Controller [Display] All indications, except for the clock time indicator, are displayed by pressing the button. Transmission mark TIMER and clock time indicator This transmission mark indicates when the The time setting for timer operation or the clock remote controller transmits signals to the indoor time is indicated.

  • Page 46: Hi-Power Mode

    9-6. Hi-POWER Mode ([Hi-POWER] button on the remote controller 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. 1.

  • Page 47: Installation Procedure

    10. INSTALLATION PROCEDURE 10-1. Safety Cautions For the rear left and left piping Hook 47 mm or more 1 Installation plate Wall Hook 140 mm or more Insert the cushion between 74 mm the indoor unit and wall, and or more tilt the indoor unit for better installation work.
  • Page 48 10-2. Optional Parts, Accessories and Tools 10-2-1. Optional Installation Parts Part Code Parts name Q’ty Refrigerant piping Indoor unit name Liquid side (Outer diameter) Gas side (Outer diameter) 1 ea. RAS-B10GKVP-E, B13GKVP-E 6.35 mm 9.52 mm RAS-B16GKVP-E 6.35 mm 12.7 mm Shield pipe (for extension drain hose) (polyethylene foam, 6 mm thick) 10-2-2.
  • Page 49 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 50: Indoor Unit

    10-3. Indoor Unit 10-3-2. Drilling a Hole and Mounting Instal- lation Plate 10-3-1. Installation Place • A place which provides enough spaces around the Drilling a hole indoor unit as shown in the diagram. When install the refrigerant pipes from the rear. •...
  • Page 51 10-3-3. Electrical Work When the installation plate is directly mounted on the wall 1. The supply voltage must be the same as the rated voltage of the air conditioner. 1. Securely fit the installation plate onto the wall by 2. Prepare a power source for the exclusive use of screws with the upper and lower catches, that the air conditioner.
  • Page 52 10-3-5. Piping and Drain Hose Installation CAUTION • Be sure to refer to the wiring system diagram Piping and drain hose forming labeled inside the front panel. • Since condensation results in machine trouble, • Check local electrical regulations for any make sure to insulate both the connecting pipes specific wiring instructions or limitations.
  • Page 53 How to attach the drain cap In case of bottom right or bottom left piping 1. Insert hexagonal wrench (4 mm). • After making slits on the front panel with a knife or similar tool, cut them out with a pair of nippers or an equivalent tool.
  • Page 54 10-3-7. Drainage CAUTION 1. Run the drain hose at a downward sloped angle. • Bind the auxiliary pipes (two) and connecting cable with facing tape tightly. NOTE : In case of leftward piping and rear-leftward • Hole should be made at a slight downward slant piping, bind the auxiliary pipes (two) only with on the outdoor side.
  • Page 55 (Energy efficiency labels) 10-4-2. Which Models can be Combined Table of models that can be connected Type Outdoor unit Indoor unit RAS-M10GKCVP-E, RAS-M13GKCVP-E, RAS-M16GKCVP-E Cooling only RAS-3M23GACV-E RAS-M10GKCV-E, RAS-M13GKCV-E, RAS-M16GKCV-E RAS-M10GDCV-E, RAS-M13GDCV-E, RAS-M16GDCV-E Table of models that can be used in combination...

  • Page 56: Installation Of Outdoor Unit

    10-5. Installation of Outdoor Unit • Total piping length: 3 units (A + B + C) Multi ....40 m 10-5-1. Installation Location (Without additional refrigerant) • A place which provides enough space around the • Minimum piping length: outdoor unit as shown in the figure. A or B or C = 2 m or more •...
  • Page 57 10-5-2. Fixing Bolt Arrangement of Outdoor 10-5-3. Refrigerant Piping Connection Unit Flaring 1. Cut the pipe with a pipe cutter. 600 mm Suction side 90˚ Obliquity Roughness Warp Fig. 10-5-4 Diffuser 2. Insert a flare nut into the pipe, and flare the pipe. Fig.
  • Page 58 • Tightening torque for connection of flare pipe Tightening Connection The pressure of R410A is higher than R22. Align the centers of the connecting pipes and tighten (Approx. 1.6 times.) Therefore securely tighten the the flare nut as much as possible with your fingers. flare pipes which connect the outdoor unit and the Then tighten the nut with a wrench and torque indoor unit with the specified tightening torque...
  • Page 59 10-5-4. Evacuating Use a vacuum pump After the piping has been connected to the indoor Be sure to use a vacuum pump with counter-flow unit, perform the air purge. prevention function so that oil inside the pump does not flow back into the air conditioner pipes when the pump stops.
  • Page 60 10-5-5. Wiring Connection Model 3 units Multi 1. Remove the valve cover, the electric parts cover 220 – 240 V ~50 Hz and the cord clamp from the outdoor unit. Power source 220 V ~60 Hz 2. Connect the connecting cable to the terminal as Maximum identified by the matching numbers on the 11 A...

  • Page 61: Check And Test Operation

    10-6. Grounding 10-7-1. Miswiring (Mis-piping) Check Make sure that the wiring and piping for each room This air conditioner must be grounded without fail. have the same alphabetical code (A, B, C). Grounding is necessary not only to safeguard Connect and secure the power cord. against the possibility of receiving an electric shock but also to absorb both the static, which is generated Use the power cord/cables with thickness, type, and...
  • Page 62 10-7-2. Miswiring (Mis-piping) Check by LED Indication • For this outdoor unit, self-miswiring (mis-piping) checks are possible using the five LEDs (1 Yellow + 4 Red). • LEDs (D800 to D804) are provided on the inverter P .C. board. D800 D801 D802 D803...
  • Page 63 10-8. Useful Functions 10-8-1. Self-Diagnosis by LED Indication • For this outdoor unit, by referring to the 5 LED (1 Yelow + 4 Red) indicator lights, self-diagnosis is possible. • LEDS (D800 to D804) are located on the sub-control board underneath the inverter. LED indication Contents Indoor alarm code...

  • Page 64: 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 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...

  • Page 65: Primary Judgment

    11-1. First Confirmation 11-1-3. Operation Which is not a Trouble (Program Operation) 11-1-1. Confirmation of Power Supply For controlling the air conditioner, the program Confirm that the power breaker operates (ON) operations are built in the microcomputer as de- normally. scribed in the following table.
  • Page 66 11-3. 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 67 11-3-2. 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. However, the check codes are not deleted even if the power supply is turned off because they are stored in the fixed memory.
  • Page 68 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. operations stop immediately.

  • Page 69: Judgment Of Trouble By Every Symptom

    11-4. Judgment of Trouble by Every Symptom 11-4-1. Indoor Unit (Including Remote Controller) (1) Power is not turned on (Does not operate entirely) <Primary check> 1. Is the supply voltage normal? 2. Is the normal voltage provided to the outdoor unit? 3.
  • Page 70 (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 supply once, and...
  • Page 71 (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 72 (5) Troubleshooting for remote controller <Primary check> Check that A or B selected on the main unit is matched with A or B selected on the remote controller. The unit does not beep at all. Press the START/STOP button. Operation lamp on indoor unit is not indicated.
  • Page 73 11-4-2. Wiring Failure (Interconnecting and Serial Signal Wire) (1) Outdoor unit does not operate ‚ ƒ 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 74 11-5. Trouble Diagnosis by Outdoor LED For the outdoor unit, the self-diagnosis is possible by LED (Yel) and four LEDs (Red). D800D801D802D803D804 • LED (Yel) (D800) and LEDs (Red) (D801 to D804) are provided on the sub-control board under surface of the Yellow inverter, and as shown below, they are checked from the wiring port when removing the wiring cover.

  • Page 75: Troubleshooting

    11-6. Troubleshooting 11-6-1. How to Check Whether the Air Purifier is Good or Not Turn off the power breaker once, and turn on again after 10 seconds. To item “Power supply is not turned on” Does the OPERATION indicator flash? Turn off the power breaker and remove CN34 (Micro switch connector).
  • Page 76 11-6-2. How to Check Whether the Minus Ion Generator is Good or Not Turn off the power breaker once, and turn on again after 10 seconds. Does the OPERATION indicator flash? To item “Power supply is not turned on” Turn off the power breaker and remove CN34 (Micro switch connector).

  • Page 77: 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 Table 11-7-1 Diagnosis/Process flowchart Item Contents Summary Preparation Turn “OFF” the power supply breaker, and remove 3P connector which connects Remove inverter and compressor. connector of compressor.

  • Page 78: How To Check Simply The Main Parts

    Diagnosis/Process flowchart Item Contents Summary Check Check winding resistance between phases of compres- sor, and resistance between outdoor frames by using a tester. Check → OK if 10MΩ or more • Is not grounded. winding of compressor.  → OK if 0.2Ω (under 20°C) •...
  • Page 79 (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 80 11-8-2. P.C. Board Layout +12V [1] Sensor characteristic table TD : Discharge temp. sensor TA : Room temp. sensor TC : Heat exchanger temp. sensor TO : Outdoor temp. sensor TGa : A room Gas side temp. sensor TGb : B room Gas side temp. sensor TGc : C room Gas side temp.
  • Page 81 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 Remote controller...
  • Page 82 11-8-5. Checking Method for Each Part Part name Checking procedure Electrolytic capacitor 1. Turn OFF the power supply breaker. (For raising pressure, 2. Discharge all three capacitors completely. smoothing) 3. Check that safety valve at the bottom of capacitor is not broken. 4.

  • Page 83: 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 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 84: How To Replace The Main Parts

    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. • After the repairs have been completed (after the front panel and cabinet have been installed), perform a test operation, and check for smoking, unusual sounds and other abnormalities.
  • Page 85 Part name Procedures Remarks Front panel 4) Press “ ” part under the front panel and remove hooks of the front panel from the installation plate. Pull here Installation plate Press here Press here Front panel Press 5) Remove the front panel fixing screws. (2 pcs.) 6) Press the electric parts box with the right thumb while pulling the both sides of the...
  • Page 86 Part name Procedures Remarks High voltage 1) Follow to the procedure in the item generator 2) Remove the drain guide. 3) To remove the air ionizer from the back body, pull it toward you while pressing down on its left Connector and right claws.
  • Page 87 Part name Procedures Remarks Electric parts 1) Follow the procedure up to 4) in above. box assembly 2) Remove screw of earth lead attached to the Lead wire end plate of the evaporator. cover 3) Remove the lead wire cover, and remove connector (5P) for the fan motor and connec- tor (5P) for the louver motor from the electric parts box assembly.
  • Page 88 Part name Procedures Remarks Horizontal louver 1) Remove shaft of the horizontal louver from the back body. (First remove the left shaft, and then remove other shafts while sliding the horizontal louver leftward.) Slide the horizontal louver leftward Evaporator 1) Follow to the procedure in the item (Heat exchanger) 2) Remove the pipe holder from the rear side of the main unit.
  • Page 89 Part name Procedures Remarks Bearing 1) Follow to the procedure in the items 2) Remove the two fixing screws used to secure the left edge panel of the heat exchanger, and Screw remove the two screws used to secure the Bearing bearing base.
  • Page 90 Part name Procedures Remarks Fan motor 1) Follow to the procedure in the item 2) Loosen the set screw of the cross flow fan. 3) Remove two fixing screws of the motor band (Right), and then remove the motor band (Right).
  • Page 91 Part name Procedures Remarks Cross flow fan <Caution at reassembling> 1) At assembling work of the bearing base, check that the drain pipe is surely incorpo- rated in the back body. (Otherwise, water leak is caused.) 2) To incorporate the fan motor, remove the fan motor rubber (at shaft core side), incorporate the motor into the position in the following figure, and then install the fan motor.
  • Page 92 12-2. Microcomputer Part name Procedure Remarks Common procedure 1) Turn the power supply off to stop the Replace terminal block, operation of air-conditioner. microcomputer ass’y and the P .C. board ass’y. 2) Remove the front panel. • Remove the 2 fixing screws. 3) Remove the electrical part base.
  • Page 93 12-3. Outdoor Unit Part name Procedure Remarks Common 1. Detachment procedure Upper cabinet 1) Stop operation of the air conditioner, and turn off the main switch of the breaker for air conditioner. 2) Remove the valve cover. Wiring cover (ST1TØ4 × 10L 1 pc.) Valve •...
  • Page 94 Part name Procedure Remarks Inverter 1. Detachment assembly 1) Perform work of items 1. of 2) Remove screw (ST1TØ4 × 10L 1 pc.) of the upper part of the front cabinet. Inverter cover P . C. board • If removing the inverter cover in this (Soldered surface) condition, P .C.
  • Page 95 Part name Procedure Remarks Control 1. Disconnect lead wires and connectors connected board from the control board assembly to other parts. assembly 1) Lead wires • Connection with terminal block : 6 wires CN601~ (Red, Orange, Pink, Black and two White wires) CN608 •...
  • Page 96 Part name Procedure Remarks Rear cabinet 1) Perform work of item 1. of 2) Remove fixed screws fixing to the bottom plate. (ST1TØ4 × 10L 2 pcs.) 3) Remove fixed screws fixing to the heat exchanger. (ST1TØ4 × 10L 2 pcs.) 4) Remove fixed screw fixing to the valve mounting plate.
  • Page 97 Part name Procedure Remarks Pulse motor 1. Detachment valve coil 1) Perform step 1. in , all the steps in and 1. 2) Release the coil by pulling it up from the electronic control valve body. Coil anti-turn 2. Attachment lock 1) When assembling the coil into the valve body, ensure that the coil anti-turn lock is installed...
  • Page 98 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 parts of sensor TO,...
  • Page 99 <MCC-1438> – 99 –...
  • Page 100 <MCC-818> – 100 –...

  • Page 101: Exploded Views And Parts List

    43080516 Electrical Air Purifying Filter 43049701 Pipe, Shield (*1) 43080527 Generator Ass’y, HV 43049698 Pipe, Shield (*2) 4308N732 Owner’s Manual 43047671 Pipe, Outlet (*2) 43047672 Pipe, Outlet (*1) (*1) RAS-M16GKCVP-E 43049674 Spring, Suction (*1) (*2) RAS-M10GKCVP-E, RAS-M13GKCVP-E – 101 –...
  • Page 102 Indoor Unit (2) 407, 408, 409 ∗ The parts in the following parts list are conformed to RoHS. Therefore be sure to use the following parts for repairing and replacing. Location Part Location Part Description Description 4306A123 Terminal Block, 2P 4306S709 P .C.
  • Page 103 13-2. Outdoor Unit 11,14,31,34 12,15,32,35 13,16,33,36 17 37, Location Part Location Part Description Description 43005638 Cabinet, Back, Ass’y 4302C070 Motor, Fan, DC, ICF-140-43-2R 43005636 Cabinet, Upper, Ass’y 43047669 Nut, Flange 43005637 Cabinet, Front, Ass’y 43020329 Fan, Propeller, PJ421 4301V030 Guard, Fan 43049749 Cushion, Rubber 43042491...
  • Page 104 13-3. P.C. Board Layout RAS-3M23GACV-E TO Sensor TD Sensor TGa Sensor TGb Sensor TGc Sensor ∗ The parts in the following parts list are conformed to RoHS. Therefore be sure to use the following parts for repairing and replacing. Location Part Location Part...
  • Page 105 This product is compliant with Directive 2002/95/EC, and cannot be disposed as unsorted municipal waste. TOSHIBA CARRIER CORPORATION 2 CHOME 12-32, KONAN, MINATOKU, TOKYO, 108-0075, JAPAN Copyright © 1999 to 2005 TOSHIBA CARRIER CORPORATION, ALL Rights Reserved.

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