Toshiba RAS-M24N3KV2-E Service Manual Download Page 16

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5. WIRING DIAGRAM

1
2

6 6

4 4

2 2

4
5 5

3 3

1 1

1 2 3

1 1

1
2

2
3

7
8

2
3

7
8

5
6

8 8

7 7

2
3 3

9 9

10 10

SHEET METAL

Line

WP-027

Wireless

Unit Assembly

Main P.C Board

MCC-5045

Filter

Power Supply Circuit

DC12V

DC5V

Color indication

WHI:WHITE

BLU:BLUE

RED:RED

BLK:BLACK

YEL:YELLOW

GREEN & YELLOW

GRN&YEL:

Outdoor Terminal Block

Indoor Terminal Block

CN02

Fuse F01

BLK

CN32

Louver Motor

CN31

DC Motor

CN10

CN21

Thermo Sensor

(TA)

CN61

Heat Exchanger Sensor

(TC)

CN62

DC15V

CN81

Heat exchanger

GRN&YEL

BLK

WHI

RED

CN11

CN22

(BLK)

(WHI)

(BLU)

(WHI)

WHI
YEL
YEL
YEL
YEL

Varistor

CN01

(WHI)

Fan Motor

WHI

BLU
BLU
BLU
BLU
BLU
BLU
BLU
BLU

BLU

(WHI)

CN51

T3.15A

250V

CN63

Heat Exchanger Sensor

(TCJ)

(YEL)

FILE NO. SVM-12087

Indoor Unit

Summary of Contents for RAS-M24N3KV2-E

Page 1: ...R410A SERVICE MANUAL AIR CONDITIONER SPLIT TYPE Indoor Unit High Wall Heat Pump Type RAS M24N3KV2 E FILE NO SVM 12087 February 2013 ...

Page 2: ...3 5 WIRING DIAGRAM 14 6 SPECIFICATIONS OF ELECTRICAL PARTS 15 7 REFRIGERANT CYCLE DIAGRAM 16 8 CONTROL BLOCK DIAGRAM 17 9 OPERATION DESCRIPTION 18 10 INSTALLATION PROCEDURE 38 11 HOW TO DIAGNOSE THE TROUBLE 50 12 HOW TO REPLACE THE MAIN PARTS 67 13 EXPLODED VIEWS AND PARTS LIST 74 FILE NO SVM 12087 ...

Page 3: ...3T20016 FAN ASSY CROSS FLOW 225 43T09040 LOUVER HORIZONTAL 205 43T49010 PIPE SHIELD 226 43T03384 BODY ASSY BACK 206 43T83305 HOLDER REMOTE CONTROL 228 43T09471 GRILLE OF AIR INLET ASSY 207 43T82008 PLATE INSTALLATION 229 43T80331 FILTER AIR 209 43T19333 HOLDER SENSOR 230 43T00594 FRONT PANEL ASSY 210 43T49043 HOLDER PIPE 232 43T62031 COVER TERMINAL 212 43T39021 BASE BEARING 235 43T44031 EVAPORATOR...

Page 4: ...f connecting sections of charging port on main unit and installation tools are different from those used for the conventional refrigerant units Accordingly special tools are required for the new refrigerant R410A units For connecting pipes use new and clean piping materials with high pressure fittings made for R410A only so that water and or dust does not enter Moreover do not use the existing pip...

Page 5: ...d electrician in accordance with the Installa tion Manual Make sure the air conditioner uses an exclusive circuit An insufficient circuit capacity or inappropriate installation may cause fire When wiring use the specified cables and connect the terminals securely to prevent external forces applied to the cable from affecting the terminals Be sure to provide grounding Do not connect ground wires to...

Page 6: ...ting m3 min Piping Type connection Indoor unit Liquid side mm Gas side mm Outdoor unit Liquid side mm Gas side mm Maximum length m Maximum chargeless length m Maximum height difference m Refrigerant Name of refrigerant Weight kg Wiring Power supply connection Interconnection Usable temperature range Indoor Cooling Heating C Outdoor Cooling Heating C Accessory Indoor unit Installation plate Wireles...

Page 7: ... in the refrigeration cycle may become abnormally high so that a rupture or personal injury may be caused 5 After completion of installation work check to make sure that there is no refrigeration gas leakage If the refrigerant gas leaks into the room coming into contact with fire in the fan driven heater space heater etc a poisonous gas may occur 6 When an air conditioning system charged with a la...

Page 8: ...ater or dust does not enter the pipe interior that no other oil than lubricating oils used in the installed air water heat pump is used and that refrigerant does not leak When using lubricating oils in the piping processing use such lubricating oils whose water content has been removed When stored be sure to seal the container with an airtight cap or any other cover 1 Flare processing procedures a...

Page 9: ...er diameter mm mm 1 4 6 35 0 8 3 8 9 52 0 8 1 2 12 70 0 8 5 8 15 88 1 0 A mm Flare tool for R22 clutch type 0 to 0 5 0 to 0 5 0 to 0 5 0 to 0 5 Conventional flare tool Clutch type Wing nut type 0 5 to 1 0 1 0 to 1 5 0 5 to 1 0 1 0 to 1 5 0 5 to 1 0 1 5 to 2 0 0 5 to 1 0 1 5 to 2 0 Nominal Outer diameter Thickness diameter mm mm 1 4 6 35 0 8 3 8 9 52 0 8 1 2 12 70 0 8 5 8 15 88 1 0 Dimension mm A B...

Page 10: ... 2 7 shows reference values NOTE When applying oil to the flare surface be sure to use oil designated by the manufacturer If any other oil is used the lubricating oils may deteriorate and cause the compressor to burn out Table 3 2 7 Tightening torque of flare for R410A Reference values Nominal Outer diameter Thickness diameter mm mm 1 4 6 35 0 8 3 8 9 52 0 8 1 2 12 70 0 8 5 8 15 88 1 0 3 4 19 05 1...

Page 11: ... the tools exclusive for R410A and their interchangeability Tools exclusive for R410A The following tools for R410A are required Tools whose specifications are changed for R410A and their interchangeability Note 1 When flaring is carried out for R410A using the conventional flare tools adjustment of projection margin is necessary For this adjustment a copper pipe gauge etc are necessary Note 2 Cha...

Page 12: ...d the connecting port of the electronic balance and charge liquid refrigerant Indoor unit Outdoor unit Opened Opened Refrigerant cylinder with siphon Check valve Open close valve for charging Electronic balance for refrigerant charging Opened Closed Service port 3 4 Recharging of Refrigerant When it is necessary to recharge refrigerant charge the specified amount of new refrigerant according to th...

Page 13: ... of silver and copper It is used to join iron copper or copper alloy and is relatively expensive though it excels in solderability 2 Phosphor bronze brazing filler Phosphor bronze brazing filler is generally used to join copper or copper alloy 3 Low temperature brazing filler Low temperature brazing filler is generally called solder and is an alloy of tin and lead Since it is weak in adhesive stre...

Page 14: ...a flux which does not contain chlorine 3 When adding water to the flux use water which does not contain chlorine e g distilled water or ion exchange water 4 Remove the flux after brazing 3 5 3 Brazing As brazing work requires sophisticated techniques experiences based upon a theoretical knowledge it must be performed by a person qualified In order to prevent the oxide film from occurring in the pi...

Page 15: ...ille Inlet 132 150 200 222 200 278 525 Drain hose 0 5m Hanger Hanger Connecting pipe 0 39m Flare 6 35 Flare 12 70 Connecting pipe 0 49m 786 262 5 262 5 235 215 215 235 320 6 5 40 47 85 6 5 40 23 109 215 5 153 5 Hanger Installation plate outline Hanger Hanger Outline of indoor unit For stud bold 6 For stud bold 8 10 Center line 63 Remote controller holder 17 5 149 57 Wireless remote controller 172 ...

Page 16: ...ply Circuit DC12V DC5V Color indication WHI WHITE BLU BLUE RED RED BLK BLACK YEL YELLOW GREEN YELLOW GRN YEL Outdoor Terminal Block Indoor Terminal Block CN02 Fuse F01 BLK CN32 Louver Motor CN31 DC Motor CN10 CN21 Thermo Sensor TA CN61 Heat Exchanger Sensor TC CN62 DC15V CN81 Heat exchanger GRN YEL BLK WHI RED CN11 CN22 BLK WHI WHI WHI BLU WHI WHI WHI WHI YEL YEL YEL YEL Varistor CN01 WHI Fan Moto...

Page 17: ... motor for indoor Room temp sensor TA sensor Heat exchanger temp sensor TC sensor Heat exchange temp sensor TCJ sensor Type MF 340 30 3 Specifications DC340V 30W 10kΩ at 25 C 10kΩ at 25 C 5 Louver motor MSBPC20F04 Output Rated 1W 16 poles DE12V 10kΩ at 25 C FILE NO SVM 12087 15 ...

Page 18: ...1 unit Max m Total NOTE Gas leak check position INDOOR UNIT T1 Temp measurement Indoor heat exchanger Cross flow fan Sectional shape of heat insulator Allowable height difference m Allowable pipe length P Pressure measurement Gauge attaching port Vacuum pump connecting port TC TCJ TA Deoxidized copper pipe Outer dia 6 35mm Thickness 0 8mm OUTDOOR UNIT FILE NO SVM 12087 7 REFRIGERANT CYCLE DIAGRAM ...

Page 19: ...g Timer Serial Signal Communication Clean Function Heat Exchanger Sensor Tc Room Temperature Sensor Ta Infrared Rays Signal Receiver and Indication Initializing Circuit Power Supply Circuit Heat Exchanger Sensor Tcj Converter D C circuit Noise Filter Clock Frequency Oscillator Circuit M C U From Outdoor Unit 220 240V 50Hz 220V 60Hz Serial Signal Transmitter Receiver Serial Signal Communication Ope...

Page 20: ...ontrol 2 Role of outdoor unit controller Receiving the operation command signal Serial signal from the indoor unit controller the outdoor unit performs its role Compressor operation control Operation control of outdoor fan motor PMV control 4 way valve control Detection of inverter input current and current release operation Over current detection and prevention operation to IGBT module Compressor...

Page 21: ...6 3 Swing 26 8 ECO operation 27 9 Temporary operation 27 10 Pulse motor valve PMV control 28 11 Self Cleaning function 28 12 Remote Controller A or B selection 29 13 QUIET mode 30 14 COMFORT SLEEP 30 15 Short Timer 30 16 One Touch Comfort 31 17 Hi POWER Mode 31 9 3 Auto Restart Function 9 3 1 How to Set the Auto Restart Function 32 9 3 2 How to Cancel the Auto Restart Function 33 9 3 3 Power Failu...

Page 22: ...ifier Operation select COOL HEAT AUTO DRY Temperature setup Air direction Swing Air volume select AUTO LOW LOW MED MED HIGH ECO COMFORT SLEEP ON timer setup QUIET OFF timer setup PRESET Hi POWER ONE TOUCH Indoor unit control Command signal generating function of indoor unit operation Calculation function temperature calculation Activation compensation function of indoor fan Cold draft preventive f...

Page 23: ...trolled in order to prevent lowering of the room temperature and to avoid air flow from blowing directly to persons Description 1 Detects the room temperature Ta when the operation started 2 Selects an operation mode from Ta in the left figure 3 Fan operation continues until an operation mode is selected 4 When AUTO operation has started within 2 hours after heating operation stopped and if the ro...

Page 24: ...dium L Low L Low L Low UL Ultra Low SUL Super Ultra Low The fan speed broadly varies due to position of the louver etc The described value indicates one under condition of inclining downward blowing 1 When setting the fan speed to L L M M or H on the remote controller the operation is performed with the constant speed shown in Fig 1 2 When setting the fan speed to AUTO on the remote controller rev...

Page 25: ...e operation is per formed with the constant speed shown in Fig 3 and Table 1 2 When setting the fan speed to AUTO on the remote controller revolution of the fan motor is controlled to the fan speed level shown in Fig 5 according to the set temperature and room temperature 3 Min air flow rate is controlled by temperature of the indoor heat exchanger Tc as shown in Fig 4 4 Cold draft prevention the ...

Page 26: ...ecified value Description 1 The difference between set temperature on remote controller Ts and room temperature Ta is calculated 2 According to the temperature difference the correction value of Hz signal which determines the compressor speed is set up 3 The rotating position and speed of the motor are detected by the electromotive force occurred on the motor winding with operation of the compress...

Page 27: ...on temperature and controls the compressor speed so that temperature of the heat exchanger does not exceed the specified value Description 1 When temperature of the indoor heat exchanger drops below 5 C the compressor speed is re duced P zone 2 When temperature of the indoor heat exchanger rises in the range from 6 C to under 7 C the compressor speed is kept Q zone 3 When temperature of the indoor...

Page 28: ...tion 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 Cooling heating memory position The angle of the louver is indicated as the horizontal angle is 0 1 Louver position in cooling operation 2 Louver position in heating operation Swing operation is performed in width 35 with the stop p...

Page 29: ...peration starts 2 When keeping RESET button pushed for 3 seconds or more Pi Pi Pi sound is heard and AUTO RESTART control is changed 3 When keeping RESET button pushed for 10 seconds or more Pi sound is heard and the temporary COOL operation starts 4 If the filter lamp goes on push RESET button to go off the filter lamp and then push RESET button again 5 To stop the temporary operation push the bu...

Page 30: ...ng operation which is then performed for the specified period based on duration of the operation which was performed prior to the shutdown after which the Self Cleaning operation stops The Self Cleaning operation is not performed after a heating operation 2 Operation 1 When the stop signal from the remote controller or timer off function is received only the timer indicator light 2 The period of t...

Page 31: ...re is no A setting display Setting the remote controller To separate using of remote controller for each indoor unit in case of 2 air conditioner are installed nearly Remote Controller B Setup 1 Push RESET button on the indoor unit to turn the air conditioner ON 2 Point the remote controller at the indoor unit 3 Push and hold CHK button on the Remote Controller by the tip of the pencil 00 will be ...

Page 32: ...rs Repeat pushing to select the hours 1hr 3hr 5hr or 9hr If the COMFORT SLEEP button is pushed again means cancel comfort sleep mode Heating mode The preset temperature will drop down as shown on ECO operation Item No 9 Push the COMFORT SLEEP button to choose the operating hours Repeat pushing to setect the hours 1hr 3hr 5hr or 9hr If the COMFORT SLEEP button is pushed again means cancel comfort s...

Page 33: ...unit receives any signal with other operation mode the unit will cancel the comfort mode and operates according to the signal received Hi POWER button on the remote controller 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 controller and the unit operates as follows 1 Automatic operation...

Page 34: ...ply being accidentally shut down When the unit is stand by Not operating When the unit is in operation Operation Push RESET button for more than 3 seconds Less than 10 seconds Motions The unit is in operation The green indicator is on The unit stops operating The green indicator is turned off After approx 3 seconds The unit beeps 3 times The green indicator flashes for 5 seconds If the unit is req...

Page 35: ...ime push RESET button once more or use the remote controller to turn it off When the system is operating Operation Push RESET button for more than 3 seconds Less than 10 seconds Motions The unit is in operation The green indicator is on The unit stops operating The green indicator is turned off After approx 3 seconds The unit beeps 3 times If the unit is required to operate at this time push RESET...

Page 36: ...ler and Its Functions Note The provided Remote Controller is a wireless type which also can be used as a wire Please see How to Connect The Remote Controller for Wired Operation located in installation instruction in case of wired control is required In wire operation remote controller will return to initial condition PRESET TIMER and CLOCK will return to initial condition when user shutdown power...

Page 37: ...sired ON timer Press Set the desired OFF timer Press Set the timer Press Set the timer Press Cancel the timer Press Press Set the ON timer Press Press Set the OFF timer Press button during the or mark flashing 1 1 2 3 2 3 3 4 Daily timer allows the user to set both the ON OFF timers and will be activated on a daily basis Setting Daily Timer During the daily timer is activation both arrows are indi...

Page 38: ...amp blink 5 time sec for 5 seconds Do not operate ON timer and OFF timer 2 Press and hold the RESET button on the indoor unit for 3 seconds to cancel the Setting operation 3 beep sound but OPERATION lamp does not blink 11 QUIET OPERATION To operate at super low fan speed for quiet operation except in DRY mode Press Start and stop the operation Note Under certain conditions QUIET operation may not ...

Page 39: ... set B appears in the remote controller display When the remote controller setting is A there is no indication at this position 10 Comfort sleep Indicates when comfort sleep is activaled Push comfort sleep button to select 11 Quiet Indicates when quiet is activated Push quiet button to start and push it again to stop operation 12 One Touch Indicates when one touch comfort is activated Push one tou...

Page 40: ...nward Cut the piping hole sloped slightly The auxiliary piping can be connected to the left rear left rear right right bottom right or bottom left Right Rear right Left Bottom right Rear left Bottom left Insulate the refrigerant pipes separately with insulation not together 8 mm thick heat resisting polyethylene foam 8 Flat head wood screw 3 Batteries 2 Wireless remote control 4 Remote control hol...

Page 41: ...Optional installation parts Part Code A B C Q ty One each 1 One each Parts name Refrigerant piping Liquid side 6 35 mm Gas side 12 70 mm Pipe insulating material polyethylene foam 8 mm thick Putty PVC tapes FILE NO SVM 12087 39 ...

Page 42: ...emote control x 1 Battery x 2 Part name Q ty Remote control holder x 1 Filter x 1 Part No 4 5 6 Part No Others Name Owner s manual Installation manual Part name Q ty 11 Filter x 1 Battery cover x 1 7 8 9 10 Mounting screw 4 x 25 s x 6 Flat head wood screw 3 1 x 16 s x 2 Flat head wood screw 3 1 x 25 s x 1 Screw 4 x 10 s x 2 ...

Page 43: ...ter Gas leakage detector Applicable to R22 model Changes As pressure is high it is impossible to measure by means of conventional gauge In order to prevent any other refrigerant from being charged each port diameter has been changed In order to increase pressure resisting strength hose materials and port size have been changed to 1 2 UNF 20 threads per inch When purchasing a charge hose be sure to...

Page 44: ...of the remote controller should be determined as shown below Fig 10 3 1 10 3 2 Drilling a Hole and Mounting Installation Plate Cutting a hole When install the refrigerant pipes from the rear Fig 10 3 2 1 After determining the pipe hole position on the installation plate ð drill the pipe hole Ø65 mm at a slight downward slant to the outdoor side NOTE When drilling into a wall that contains a metal ...

Page 45: ...0 mm 80 mm 110 mm Stripping length of the connecting cable Connecting cable about 15 cm Fig 10 3 6 NOTE Use stranded wire only Wire type More than 1 5 mm2 H07RN F or 60254 IEC66 or 1 3 mm2 AWG 16 Anchor bolt Projection 15 mm or less 5 mm dia hole Clip anchor local parts 7 Mounting screw Ø4 25 l Installation plate Keep horizontal direction When the installation plate is directly mounted on the wall...

Page 46: ...ller by sliding down and take it out 2 If batteries are exist please take them out The combination of using wire controller and batteries may cause of batteries explosion 3 Make hole for insert control wire by use screwdriver break the polyester sheet as shown on figure 7 4 Insert control wire from rear side of remote controller as shown on figure 8 5 Fix control wire which arrange as shown on fig...

Page 47: ...anging drain hose For leftward connection bottom leftward connection and rear leftward connection s piping it is necessary to change the drain hose and drain cap How to remove the drain cap Clip the drain cap by needle nose pliers and pull out Fig 10 3 13 C Die cutting front panel slit Changing drain hose Piping preparation Rear right Rear left Bottom left Left Bottom right Right 1 Die cutting fro...

Page 48: ...hand connection with piping Bend the connecting pipes so that it is laid within 43 mm above the wall surface If the connecting pipes is laid exceding 43 mm above the wall surface the indoor unit may unstably be set on the wall When bending the connecting pipe make sure to use a spring bender so as not to crush the pipe In case of bottom right or bottom left piping After scribing slits on the front...

Page 49: ...ooked on the installation plate For detaching the indoor unit from the installation plate pull the indoor unit toward you while pushing the bottom up at the specified parts Fig 10 3 22 Push Push Fig 10 3 21 50 mm or more Do not rise the drain hose Do not form the drain hose into the waved shape Do not put the drain hose end into water Do not put the drain hose end in the drainage ditch Shield pipe...

Page 50: ...Outdoor Unit No COMMENT Page 1 Installation Place 2 Draining the Water 3 Refrigerant Piping Connection 4 Evacuating 5 Wiring Connection Refer to SERVICE MANUAL of connected outdoor unit 48 FILE NO SVM 12087 ...

Page 51: ...ose not activate Information CAUTION 10 5 1 Remote Control A B Selection When two indoor units are installed in the same room or adjacent two rooms if operating a unit two units may receive the remote control signal simultaneously and operate In this case the operation can be preserved by setting either one remote control to B setting Both are set to A setting in factory shipment The remote contro...

Page 52: ...ow to Check Simple the Main Parts 10 How to Simply Judge Whether Outdoor Fan motor is Good or Bad Refer to SERVICE MANUAL of connected outdoor unit 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 ...

Page 53: ...rated Increasing of compressor motor speed stops approx 30 seconds after operation started and then compressor motor speed increases again approx 30 seconds after In AUTO mode the operation mode is changed In HEAT mode the compressor motor speed does not increase up to the maxi mum speed or decreases before the temperature arrives at the set temperature Description The OPERATION lamp of the indoor...

Page 54: ...onditioner operates 2 When item B and C and item B and a part of item E occur concurrently priority is given to the block of item B 3 The check codes can be confirmed on the remote controller for servicing Indoor indication lamp flashes Which lamp does flash Item A B C D E Check code Block display OPERATION Green Flashing display 1 Hz OPERATION Green Flashing display 5 Hz OPERATION Green TIMER Yel...

Page 55: ...on If there is no fault with a code the indoor unit will beep once Beep and the display of the remote controller will change as follows The TIMER indicator of the indoor unit flashes continuously 5 times per 1 sec Check the unit with all 52 check codes to as shown in Table 11 4 1 Press ON or OFF button to change the check code backward If there is a fault the indoor unit will beep for 10 seconds B...

Page 56: ...oom Operation Flashes when 1 Check the sensor TA and connection board temperature sensor is continues error is detected 2 In case of the sensor and its short Circuit or disconnection connection is normal check the P C board TC sensor The heat Operation Flashes when 1 Check the sensor TC and connection exchanger temperature continues error is detected 2 In case of the sensor and its sensor of the i...

Page 57: ...or unit open 4 The outdoor unit abnormal stop at circuit of signal some time Signal circuit of indoor If the other check codes are found P C board or outdoor concurrently check them together P C board is failure Check protector hardware such in some period as Hi Pressure switch Thermal Relay etc Check refrigerant amount or any possibility case which may caused high temperature or high pressure Che...

Page 58: ...resistance of compressor winding If circuit is shortage replace the compressor Current detect circuit of All OFF Flashes after Even if trying to operate again all inverter P C board error error is detected operations stop replace inverter 4 times P C board TE sensor The heat All OFF Flashes after 1 Check sensors TE TS and connection exchanger temperature error is detected 2 In case of the sensors ...

Page 59: ...rror count comes 4 times record error to check code But after re starting operation if no error is detected and air conditioner can operate more than 6 minutes error count is cleared The others Return signal of the outdoor Indoor unit Flashes when 1 Check power supply Rate 10 including unit has been sent when operates error is detected 2 If the air conditioner repeat operates compressor operation ...

Page 60: ...sound of initial operation etc 4 Observe any possibility cause which may affect high temperature of compressor Compressor is high current All OFF Flashes after 1 Check installation conditions such as though operation Hz is error is detected packed valve opening refrigerant decreased to minimum limit 4 times amount and power supply rate 10 Installation problem both of operation and non operation In...

Page 61: ...tage DC12V or 5V indicated on rear of indoor control board normal Does transmission mark on remote controller flash normally and is its signal transmitted properly Is DC310 340V supplied between CN31 1 3 Does fan motor connector between CN31 1 3 short circuit Item by symptoms Operation Check Item Considerable principle cause Measures Parts R04 R05 DB01 C01 C03 IC01 and T01 are defective Remote con...

Page 62: ...ndoor unit in cooling operation at airflow level LOW Change airflow level to HIGH Fan motor operates normally Replace indoor fan motor Replace main P C board Replace bearing Does indoor fan operate Is it possible to change airflow level to HIGH Is it possible to rotate cross flow fan by hand properly Does fan motor continue to operate Is it possible to detect DC 15V between 4 and 3 of motor connec...

Page 63: ...of the fan motor lead wires 3 Check DC voltage with CN31 connector while the fan motor is rotating NOTE Do not disconnect the connector while the fan motor is rotating Use a thin test rod Indoor fan starts rotating when power supply is turned on Check output DC voltage of fan motor on P C board Measure voltage between 3 GND BLACK and 5 V line YELLOW of motor connector CN31 while indoor fan motor i...

Page 64: ...ective P C board is defective Replace batteries Replace P C board Normal operation Push the button Push RESET button on remote controller with tip of pencil Is transmission mark indicated Does indoor unit beep and operate Is transmission mark indicated Is receiver on indoor unit exposed to direct sunlight Does indoor unit operate when moving remote controller near receiver or indoor unit Does indo...

Page 65: ... the whole housing Do not pull at the lead wire 2 Inspection procedures 1 When a P C board is judged to be defective check for disconnection burning or discoloration of the copper foil pattern or this P C board 2 The P C board consists of the following 2 parts a Main P C board part DC power supply circuit Indoor fan motor control circuit CPU and peripheral circuits buzzer and Driving circuit of lo...

Page 66: ... whether or not all indicators OPERATION TIMER FILTER Preheat Defrost are lit for 3 seconds and they return to normal 3 seconds later 1 Check whether or not the compressor operates 2 Check whether or not the OPERATION indicator flashes 1 Check whether or not the compressor operates 2 Check whether or not the OPERATION indicator flashes 1 Check it is impossible to detect the voltage DC 15V between ...

Page 67: ...oard Layout GND 5V 12V 100 30 40 50 60 70 80 90 20 10 0 0 10 20 30 40 50 Resistance value kΩ Temperature C TA Room temp sensor TC TCJ Heat exchanger temp sensor TA TC TCJ 1 Sensor characteristic table FILE NO SVM 12087 ...

Page 68: ...sure the resistance value with tester Normal temp Refer to 11 5 1 5 Measure the resistance value of each winding coil by using the tester Under normal temp 25 C Refer to 11 5 1 3 and 4 Temperature Sensor TA TC kΩ 10 C 20 C 25 C 30 C 40 C 20 7 12 6 10 0 7 9 4 5 Position 1 to 2 1 to 3 1 to 4 1 to 5 Resistance value 250 20Ω 11 7 How to Simply Judge Whether Outdoor Fan Motor is Good or Bad Refer to SE...

Page 69: ...shed they may ignite any oil mixed with the refrigerant gas 2 Do not use welding equipment in an airtight room Carbon monoxide poisoning may result if the room is not properly ventilated 3 Do not bring welding equipment near flammable objects Flames from the equipment may cause the flammable objects to catch fire If keeping the power on is absolutely unavoidable while doing a job such as inspectin...

Page 70: ...pcs 6 Take off four hooks of panel from rear side How to assemble the front panel 1 Press three center positions and two lower center positions of the air outlet and then hang the hanging hooks 4 pcs at the top side of the front panel to the rear plate 2 Tighten four screws Incomplete hanging or incomplete pressing may cause a dewdrops or generation of a fluttering sound 2 Screws Three hooks 4 Scr...

Page 71: ...ads once at the bottom 4 Disengage the display unit by simply pushing at the top of the display unit 5 Remove the fixing screw that secures the conduit mount electric parts box assembly LED assembly and remove the assembly Electric art box cover s screw TC sensor Earth Screw Fan motor connector Louver motor connector Fixing screw LED assembly Fixing screw Loof the qrunding wire p FILE NO SVM 12087...

Page 72: ...ther shafts while sliding the horizontal louver leftward Evaporator Heat exchanger 1 Follow to the procedure in the item 2 Remove the pipe holder from the rear side of the main unit Figure 1 3 Remove two fixing screws at the left side of the end plate of the heat exchanger Remarks Screw Screw FILE NO SVM 12087 Figure 1 Figure 2 Figure 3 Pipe hoolder ...

Page 73: ...ring is out from the housing push it into the specified position and then incorporate it in the main body Bearing Bearing base Two screws Bearing Bearing base FILE NO SVM 12087 One screw One screw 4 Remove three fixing screw at the right side of the heat exchanger and separate the heat exchanger from the back body Bearing Evaporator Heat exchanger Figure 5 Figure 4 5 Figure 4 n o ...

Page 74: ...ew 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 Remarks 5 Pull the fan motor outward Set screw Two screws on motor band Two screws on motor cover FILE NO SVM 12087 p ...

Page 75: ...e main unit Holding the set screw install the cross flow fan so that flat area on shaft of the fan motor comes to the mounting hole of the set screw q FILE NO SVM 12087 Perform positioning of the fan motor as follows When assembling the fan motor the fan motor must be installed in such a way that the fan motor leads will be taken out is positioned at the bottom front After assembling the two hooki...

Page 76: ...401 43T50308 SENSOR HEAT EXCHANGER 407 43T69893 PC BOARD ASSY 402 43T60331 TERMINAL 3P 412 43T21434 STEPPING MOTOR 403 43T69320 TEMPERATURE SENSOR 413 43T60386 MOTOR CORD 404 43T62003 CORD CLAMP 414 43T50320 SENSOR HEAT EXCHANGER 405 43T6V316 PC BOARD ASSY WRS LED Description Description ...

Page 77: ...TOSHIBA CARRIER THAILAND CO LTD ...

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Toshiba RAS-M24N3KV2-E, Service Manual

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