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Toshiba RAS-M22SKV-E, Service Manual

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CONTENTS

1. SAFETY PRECAUTIONS .......................................................................... 3

2. SPECIFICATIONS ...................................................................................... 5

3. REFRIGERANT R410A ............................................................................. 

6

4. CONSTRUCTION VIEWS ........................................................................ 1

4

5. WIRING DIAGRAM .................................................................................. 1

5

6. SPECIFICATIONS OF ELECTRICAL PARTS ........................................ 

16

7. REFRIGERANT CYCLE DIAGRAM ........................................................ 

17

8. CONTROL BLOCK DIAGRAM ................................................................ 

18

9. OPERATION DESCRIPTION ................................................................... 

19

10. INSTALLATION PROCEDURE ................................................................ 

40

11. HOW TO DIAGNOSE THE TROUBLE ...................................................... 

50

12. HOW TO REPLACE THE MAIN PARTS ................................................... 

67

13. EXPLODED VIEWS AND PARTS LIST ................................................

..

. 

74

Summary of Contents for RAS-M22SKV-E

Page 1: ...R410A SERVICE MANUAL AIR CONDITIONER SPLIT TYPE Indoor Unit High Wall Heat Pump Type RAS M22SKV E RAS M24SKV E PRINTED IN JAPAN FILE NO SVM 10070 1 Revised May 2011 ...

Page 2: ...N VIEWS 14 5 WIRING DIAGRAM 15 6 SPECIFICATIONS OF ELECTRICAL PARTS 16 7 REFRIGERANT CYCLE DIAGRAM 17 8 CONTROL BLOCK DIAGRAM 18 9 OPERATION DESCRIPTION 19 10 INSTALLATION PROCEDURE 40 11 HOW TO DIAGNOSE THE TROUBLE 50 12 HOW TO REPLACE THE MAIN PARTS 67 13 EXPLODED VIEWS AND PARTS LIST 74 ...

Page 3: ...e sizes of 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 exi...

Page 4: ... qualified 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...

Page 5: ...model Dimension High mm Medium mm Depth mm Net weight kg Compressor Motor output W Type Model Fan motor output W Air flow rate Cooling Heating m3 min Piping Type Flare connection Flare connection connection Indoor unit Liquid side mm 6 35 6 35 Gas side mm 12 7 12 7 Outdoor unit Liquid side mm Gas side mm Maximum length m Maximum chargeless length m Maximum height difference m Refrigerant Name of r...

Page 6: ... pressure 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 ...

Page 7: ...re that water 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 pro...

Page 8: ...ss diameter 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 Dimensi...

Page 9: ...s Table 3 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 ...

Page 10: ...elow shows 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 ...

Page 11: ...linder and 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 accord...

Page 12: ... composed 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 adhe...

Page 13: ...fore use 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 ...

Page 14: ...15 215 85 23 132 320 40 40 50 73 5 7 50 73 5 7 Front panel Air filter Heat exchanger Installation plate hanger Installation plate hanger Connecting plate 0 39m For 18 22 series Flare Ø12 70mm Drain hose 0 5mm Connecting pipe 0 49m Flare Ø6 35mm Air inlet Knock out system Knock out system Hanger Hanger Center line Instrallation plate outline Hanger 14 Remote controller holder 26 125 63 ...

Page 15: ...I 3 4 5 2 1 3 4 5 2 1 3 4 2 1 1 1 2 2 1 WHI BLK BLK RED Fuse F01 T3 15A AC250V CN62 BLU CN10 WHI CN21 WHI Heat exchanger sensor TC 1 2 1 2 CN61 WHI Thermo sensor TA Wireless unit assembly MCC 5044 Main P C board MCC 5045 1 2 1 2 1 2 3 4 5 6 7 8 9 10 11 3 4 5 6 7 8 9 10 11 1 2 1 2 3 4 5 6 7 8 9 10 11 3 4 5 6 7 8 9 10 11 1 2 BLU BLU WHI YEL YEL YEL YEL BLU BLU BLU BLU BLU BLU BLU BLU WHI 3 4 5 2 1 3...

Page 16: ...arts name Fan motor for indoor Room temp sensor TA sensor Heat exchanger temp sensor TC sensor Heat exchange temp sensor TCJ sensor Type MFF 340 30 2 Specifications DC340V 30W 10kΩ at 25 C 10kΩ at 25 C 5 Louver motor 24BYJ48 HT Output Rated 1W 16 poles DE12V 10kΩ at 25 C ...

Page 17: ...Charge m Deoxidized copper pipe Outer dia 12 7mm Thickness 0 8mm Per 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 Thickn...

Page 18: ...r 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 Operation...

Page 19: ...eration control 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 C...

Page 20: ...ment 27 3 Swing 27 8 ECO operation 28 9 Temporary operation 28 10 Pulse motor valve PMV control 29 11 Self Cleaning function 30 12 Remote Controller A or B selection 31 13 QUIET mode 32 14 COMFORT SLEEP 32 15 Short Timer 32 16 One Touch Comfort 33 17 Hi POWER Mode 33 9 3 Auto Restart Function 34 9 3 1 How to Set the Auto Restart Function 34 9 3 2 How to Cancel the Auto Restart Function 35 9 3 3 Po...

Page 21: ...r Air purifier 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 pre...

Page 22: ...ed is controlled 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 ...

Page 23: ...ue 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 revolution of the fan motor is controlled to the fan speed level shown in Fig 2 and Table...

Page 24: ...roller the 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 preven...

Page 25: ...ed the specified 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...

Page 26: ...ondensation 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 t...

Page 27: ...the operation 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 t...

Page 28: ...ry AUTO operation 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 pu...

Page 29: ...d 2 Adjust the open degree of valve by super heat amount SH control 3 If the discharge temperature was excessively up adjust the open degree of valve so that it is in the range of set temperature Discharge temp control 4 When defrost operation is performed the open degree of valve is adjusted according to each setup conditions during preparation for defrost or during defrost operation 4 way valve ...

Page 30: ...rmed 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 the Self Cleaning operation is de...

Page 31: ... 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 sh...

Page 32: ...ect 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 sleep mode 14 COMFORT SLE...

Page 33: ...e indoor 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 ...

Page 34: ...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 required to operate at this time pus...

Page 35: ...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 button once more or use the remote...

Page 36: ...mized settings control temperature air flow strength air flow direction and other settings to provide you alternate contact with ONE TOUCH of the button If you prefer other settings you can select from the many other operation functions of your TOSHIBA unit Push ONE TOUCH Start the operaton 2 AUTOMATIC OPERATION To automatically select cooling heating operation 1 Push MODE Select A 2 Push TEMP MOD...

Page 37: ...t temperature will decrease 7 TEMPORARY OPERATION In case of the misplaced or discharged remote controller Pushing the RESET button the unit can start or stop without using the remote controller Operation mode is set on AUTOMATIC operation preset temperature is 24 C and fan operation is automatic speed 8 TIMER OPERATION Everyday timer allows the user to set both the ON and OFF timers and will be a...

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

Page 39: ...ator Indicates when the ECO is in activated Push the ECO button to start and push it again to stop operation 9 A B change indicator remote controller When the remote controller switching function is 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 sl...

Page 40: ... allow the drain hose to get slack 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 Bottom right Rear left Bottom left Left 8 mm thick heat resisting polyethylene foam 1 Batteries Pan head wood screw Remote control holder Wireless remote control Shield pipe Attach to the front panel Air fil...

Page 41: ...M24SKV E Shield pipe for extension drain hose polyethylene foam 8 mm thick Q ty 1 ea 1 Part name Q ty Installation plate 1 Wireless remote controller 1 Battery 2 Remote controller holder 1 Part No 5 6 7 8 Part name Q ty TOSHIBA IAQ Filter 4 Mounting screw Ø4 25 l 6 Remote controller holder mounting screw Ø3 1 16 l 2 Part No 1 2 3 4 P R E S E T ONE T OUCH QUIET S WING T IMER ON F IL TE R C HK C LOC...

Page 42: ...pump adapter 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 b...

Page 43: ...r noise interference The location of the remote controller should be determined as shown below Fig 10 3 1 10 3 2 Drilling a Hole and Mounting Installation Plate Drilling 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...

Page 44: ...e of the air conditioner NOTE Wire type H07RN F or 60245IEC66 CAUTION This appliance can be connected to a main circuit breaker in either of the following two ways 1 Connection to fixed wiring A switch or circuit breaker which disconnects all poles and has a contact separation of at least 3 mm must be incorporated in the fixed wiring An approved circuit breaker or switch must be used 2 Connection ...

Page 45: ...remove the drain hose The drain hose is secured in place by a screw Remove the screw securing the drain hose then pull out the drain hose Die cutting Front panel slit Changing drain hose Piping preparation Rear right Rear left Bottom left Left Bottom right Right Fig 10 3 10 CAUTION Be sure to refer to the wiring system diagram labeled inside the front panel Check local electrical regulations for a...

Page 46: ...so that they are posi tioned within 43 mm above the wall surface If the connecting pipes are positioned more than 43 mm above the wall surface the indoor unit may be unstable When bending the connecting pipe make sure to use a spring bender to avoid crushing the pipe Refer to the table below for the bending radius of each connection pipe Fig 10 3 15 NOTE If the pipe is incorrectly bent the indoor ...

Page 47: ...t is firmly hooked on the installation plate Installation plate Indoor unit Connecting cable Auxiliary pipes 10 3 7 Drainage 1 Run the drain hose at a downward sloped angle NOTE Hole should be made at a slight downward slant on the outdoor side Fig 10 3 19 2 Put water in the drain pan and make sure that the water is being drained outside 3 When connecting extension drain hose insulate the connecti...

Page 48: ...10 4 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 ...

Page 49: ...e remote controller signal simultaneously and operate In this case the operation can be preserved by setting either one indoor unit or remote controller to B setting Both are set to A setting in factory shipment The remote controller signal is not received when the settings of indoor unit and remote controller are different There is no relation between A setting B setting and A room B room when co...

Page 50: ... Unit 9 How 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 ...

Page 51: ...operated 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 ind...

Page 52: ...hen air conditioner 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 ...

Page 53: ...the service mode is indicated on the display of the remote controller Push ON or OFF button 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 Push ON or OFF button to chang...

Page 54: ...oor side from operation started 1 Defective wiring of connecting cable 2 Operation of compres sor thermo Gas shortage Gas leak Air conditioner status Operation continues Operation continues All off Operation continues Operation continues Remarks Displayed when error is detected Displayed when error is detected Displayed when error is detected Displayed when error is detected Flashes when trouble i...

Page 55: ...n signal is reset Displayed when error is detected Displayed when error is detected Displayed when error is detected Judgment and action Even if trying operation again all operations stop immediately Replace P C board 1 Even if connecting lead wire of compressor is removed position detect circuit error occurred Replace P C board 2 Measure resistance between wires of compressor and perform short ci...

Page 56: ...controller Is voltage 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 def...

Page 57: ...rt to operate indoor 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 ...

Page 58: ...he cover 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 fa...

Page 59: ...er is defective P C board is defective Replace batteries Replace P C board Normal operation Push the START STOP 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 i...

Page 60: ...vary 2 Outdoor unit stops in a little while after operation started Check procedure Select phenomena described below 1 If the unit stops once it does not operate until the power will be turned on again 2 The outdoor unit stops 10 minutes to 1 hour after operation started and an alarm is displayed Discharge temp error check code 03 1E Sensor temp error check code 02 1C Red White Terminal block S527...

Page 61: ... valve sound hitting to stopper heard from valve when the air conditioner starts the operation after turning off power of the air conditioner once Are temp sensors of indoor outdoor units correctly set to the holder NOTE The temperature sensors which are used to control pulse motor valve include indoor heat exchanger sensor TC outdoor heat exchanger temp sensor TE outdoor suction temp sensor TS an...

Page 62: ... and compressor Check whether 25A fuse on the control board assembly is blown or not F01 Turn on the power breaker and operate the air condi tioner in COOL mode by time shortening Measure terminal voltage of the electrolytic capacity 500µF 400V 3 760µF 400V 3 After operation turn off the power breaker after 2 minutes 20 seconds passed and discharge the electrolytic capacitor by soldering iron Chec...

Page 63: ...r fan motor control circuit CPU and peripheral circuits buzzer and Driving circuit of louver b Indication unit of infrared ray receiving infrared ray receiving circuit LED To check defect of the P C board follow the procedure described below NG OK B A Replace control board assembly Replace control board Replace compressor Check compressor winding resistance Diagnosis Process flowchart Item Check O...

Page 64: ...CN01 DC 15 60V Check 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 vol...

Page 65: ... 90 20 10 0 0 10 20 30 40 50 Resistance value kΩ Temperature C TD Discharge temp sensor TA Room temp sensor TC TCJ Heat exchanger temp sensor TO Outdoor temp sensor TE Outdoor heat exchanger temp sensor TS Suction temp sensor TA TC TCJ TO TE TS TD 1 Sensor characteristic table ...

Page 66: ...apacitor For boost smoothing Diode block Checking procedure 1 Turn OFF the power supply breaker 2 Discharge all three capacitors completely 3 Check that safety valve at the bottom of capacitor is not broken 4 Check that vessel is not swollen or exploded 5 Check that electrolytic liquid does not blow off 6 Check that the normal charging characteristics are shown in continuity test by the tester Cas...

Page 67: ...f the flames are not extinguished 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 ...

Page 68: ...hooks 4 Remove the front panel fixing screws 4 pcs 5 Take off 4 hooks of panel from rear side How to assemble the front panel 1 Push 3 center positions and 2 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 pushing may cause a dewdrops or generation of a flutter...

Page 69: ...display unit by simply pushing at the top of the display unit 6 Remove the fixing screw that secures the electric parts box assembly LED assembly and remove the assembly 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 Horizontal louver 3 1 Hook the top part of the electric parts box ass...

Page 70: ...nger 5 Bearing Bearing base Bearing 2 screws 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 1 Follow to the procedure in the item 4 2 Remove the 2 screws used to secure the bearing base 3 Remove the bearing base Screw Screw 2 screws Screw Screw 4 Remove 2 fixing screws on the heat exchage fixing holder to se...

Page 71: ...en the set screw of the cross flow fan 3 Remove 2 fixing screws of the motor cover and then remove the motor cover 4 Remove 2 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 ...

Page 72: ...et keeping 5 mm from wall of rear plate of the main unit Holding the set screw install the cross flow fan so that U groove of the fan motor comes to the mounting hole of the set screw 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 assemblin...

Page 73: ...ocedure 1 Turn the power supply off to stop the operation of air conditioner 2 Remove the front panels Remove the 2 fixing screws 3 Remove the electrical part base Remarks Replace terminal block microcomputer ass y and the P C board ass y IC11 J201 DB01 CN31 T101 GND 12V 5V ...

Page 74: ...3 HOSE DRAIN 224 43T39022 BAND MOTOR RIGHT UP 204 43T20016 FAN ASSY CROSS FLOW 225 43T09040 LOUVER HORIZONTAL 205 43T49010 PIPE SHIELD 226 43T03014 BODY ASSY BACK 206 43T83003 HOLDER REMOTE 228 43T09041 GRILLE ASSY SUB TOSHIBA 207 43T82008 PLATE INSTALLATION 229 43T80019 AIR FILTER 209 43T19333 HOLDER SENSOR 230 43T00052 PANEL ASSY SERVICE 210 43T49043 HOLDER PIPE 232 43T62031 COVER TERMINAL 212 4...

Page 75: ...3T69892 PC BOARD ASSY RAS M22SKV E 402 43T60331 TERMINAL 3P 43T69893 PC BOARD ASSY RAS M24SKV E 403 43T69320 TEMPERATURE SENSOR 412 43T21420 STEPPING MOTOR 404 43T62003 CORD CLAMP 413 43T60386 MOTOR CORD 405 43T69736 PC BOARD ASSY WRS LED 414 43T50320 SENSOR HEAT EXCHANGER Description Description 13 2 Indoor Unit Part E ...

Page 76: ...BANGKADI INDUSTRIAL PARK TIVANON ROAD TAMBOL BANGKADI AMPHUR MUANG PATHUMTHANI 12000 THAILAND TOSHIBA CARRIER CORPORATION 23 17 TAKANAWA 3 CHOME MINATOKU TOKYO 108 0074 JAPAN Copyright 1999 to 2010 TOSHIBA CARRIER CORPORATION ALL Rights Reserved ...

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