Toshiba RAS-M07N3KV2-E Service Manual Download Page 13

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8-2. Operation Description

1. Basic operation ........................................................................................................... 13

1. Operation control ................................................................................................... 13

2. Operating mode selection when performing 2-room operation ......................... 14

3. Cooling/Heating operation ..................................................................................... 14

4. AUTO operation .................................................................................................... 15

2. Indoor fan motor control ............................................................................................. 16

4. Release protective control by temperature of indoor heat exchanger ........................ 19

5. Louver control ............................................................................................................. 20

1) Louver position ....................................................................................................... 20

2) Air direction adjustment ......................................................................................... 20

3) Swing ..................................................................................................................... 20

6. ECO operation ............................................................................................................ 21

7. Temporary operation ................................................................................................... 22

8. Self-Cleaning function ................................................................................................ 23

9. Selt-Cleaning function ............................................................................................... 24

10. Remote-A or B selection ............................................................................................ 25

8-3. Auto Restart Function

9-3-1. How to Set the A uto Restart Function .............................. ........................................ 28

9-3-2. How to Cancel the Au to Restar t Function ................................................................. 29

9-3-3. Power F ailure During Timer Operation ............................................................... .... 29

FILTER Indicator

...............................................................................................

8-4. Remote Controller and Its Fuctions

9-4-1. Parts Name of Remote Contr oller .............................................................................. 30

9-4-2. Operation of remote control ....................................................................................... 30

11. QUIET mode ............................................................................................................. 26

12. COMFORT SLEEP ............ ...................................................................................... 26

13. Short Timer ................................................................................................................ 26

14. One-Touch Comfort ..................... ............................................................................. 27

15. Hi-POWER Mode ..................... ................................................................................. 27

9-4-3. Name and Functions of Indications on Remote Contr oller ........................................ 33

5. DRY operation ....................................................................................................... 15

Capacity control .......................................................................................................... 18

FILE NO. SVM-12072

Summary of Contents for RAS-M07N3KV2-E

Page 1: ...R410A SERVICE MANUAL SPLIT TYPE Indoor Unit High Wall Heat PumpType January 2013 FILE NO SVM 12072 SWING FAN FIX QUIET HiPOWER ONE T OUCH COM FOR T SLEE P RAS M07N3KV2 E ...

Page 2: ... DIAGRAM 7 5 SPECIFICATIONS OF ELECTRICAL PARTS 8 6 REFRIGERANT CYCLE DIAGRAM 9 7 CONTROL BLOCK DIAGRAM 10 8 OPERATION DESCRIPTION 11 9 INSTALLATION PROCEDURE 34 10 HOW TO DIAGNOSE THE TROUBLE 45 11 HOW TO REPLACE THE MAIN PAARTS 66 12 EXPLODED VIEWS AND PARTS LIST 74 FILE NO SVM 12072 ...

Page 3: ... EXPLOSION TO PREVENT OVERHEATING THE INDOOR UNIT AND CAUSING A FIRE HAZARD PLACE THE UNIT WELL AWAY MORE THAN 2 M FROM HEAT SOURCES SUCH AS RADIATORS HEATERS FURNACE STOVES ETC WHEN MOVING THE AIR CONDITIONER FOR INSTALLING IT IN ANOTHER PLACE AGAIN BE VERY CAREFUL NOT TO GET THE SPECIFIED REFRIGERANT R410A WITH ANY OTHER GASEOUS BODY INTO THE REFRIGERATION CYCLE IF AIR OR ANY OTHER GAS IS MIXED ...

Page 4: ...t where flammable gas may leak It there is any gas leakage or accumulation around the unit it can cause a fire Do not select a location for installation where there may be excessive water or humidity such as a bathroom Deterioration of insulation may cause elestrical shock or fire Installation work must be performed following the instructions in this installation manual Improper installation may c...

Page 5: ... Ensure that drained water is discharged Improper drainage can result in water leakage causing water damage to furniture Tighten the flare nut with a torque wrench using the prescribed method Do not apply excess torque Otherwise the nut may crack after a long period of usage and it may cause the leakage of refrigerant Wear gloves heavy gloves such as cotton gloves for installation work Failure to ...

Page 6: ...nimum length per unit m Maximum length total m Maximum chargeless length m Additional refriderant Maximum height difference m Name of refrigerant Weight kg Wiring connection Power supply Interconnection Usable temperature range Indoor Cooling Heating C Outdoor Cooling Heating C Accessory Indoor unit Installation plate Wireless remote control Remote control holder Pan head wood screw Super Oxi Deo ...

Page 7: ...ront panel 225 63 7 48 480 Indoor Unit Installation plate outline Hanger Hanger Center line Hanger 621 Drain hose 0 50m Connecting pipe 0 40m Connecting pipe 0 35m 6 35mm Flare Installation plate hanger Installation plate hanger Flare 9 52mm 116 170 or more 170 or more 65 or more Minimum distance to wall Minimum distance to wall Minimum distance to ceiling 63 Remote controller holder 17 5 149 6 27...

Page 8: ...RED RED BLU BLUE WHI WHITE GRN YEL GREEN YELLOW Varistor Line Filter Heat exchanger GRN YEL Outdoor terminal block POWER SUPPLY From outdoor Unit Indoor terminal block BLK WHI RED BLK WHI RED YEL BRW GRY WP 027 Infrared rays receiver and indication parts Thermo Sensor TA Heat Exchanger Sensor TC AC Motor Louver Motor FAN motor Main PC Board WP 020 Power Supply Circuit DC 12V DC 5V T3 15A Fuse F01 ...

Page 9: ...220 20 4D AC 240V 20W 2 Room temp sensor TA sensor 10kΩ at 25 C 3 Heat exchanger temp sensor TC sensor 10kΩ at 25 C 4 Louver motor MSBPC20F04 Output Rated 1W 16 poles DC12V 1 Fan motor for indoor 5 SPECIFICATIONS OF ELECTRICAL PARTS FILE NO SVM 12072 8 ...

Page 10: ...ined INDOOR UNIT T1 Temp measurement TC TA Indoor heat exchanger Cross flow fan Deoxidized copper pipe Outer dia 6 35mm Thickness 0 8mm Sectional shape of heat insulator Allowable height difference 10m Allowable pipe length P Pressure measurement Gauge attaching port Vacuum pump connecting port Min 1 Chargeless 1 Max 1 Charge 1 TCJ FILE NO SVM 12072 ...

Page 11: ...ator Circuit Power Supply Circuit Infrared Rays 36 7kHz Remote Controller Thermo Setting Fan Speed Selection ON TIMER Setting OFF TIMER Setting Louver AUTO Swing Louver Direction Setting QUIET Operation Mode Selection AUTO COOL DRY HEAT REMOTE CONTROLLER ECO Hi POWER Heat Exchanger Sensor Tc Room Temperature Sensor Ta Infrared Rays Signal Receiver and Indication Functions Cold draft preventing Fun...

Page 12: ...us meets to the operation command signal Whether protective circuit operates When no signal is received from the outdoor unit controller it is assumed as a trouble motor drive circuit is mounted to the indoor unit The compressor and the inverter to control fan motor are mounted to the outdoor unit The entire air conditioner is mainly controlled by the indoor unit controller The indoor unit control...

Page 13: ... 22 8 Self Cleaning function 23 9 Selt Cleaning function 24 10 Remote A or B selection 25 8 3 Auto Restart Function 9 3 1 How to Set the Auto Restart Function 28 9 3 2 How to Cancel the Auto Restart Function 29 9 3 3 Power Failure During Timer Operation 29 16 FILTER Indicator 27 8 4 Remote Controller and Its Fuctions 9 4 1 Parts Name of Remote Controller 30 9 4 2 Operation of remote control 30 11 ...

Page 14: ...ller ON OFF Air conditioner Operation select COOL HEAT AUTO DRY Temperature setup Air direction Swing Air volume select AUTO LOW LOW MED MED HIGH ECO ON timer setup OFF timer setup Hi POWER Indoor unit control Command signal generating function of indoor unit operation Calculation function temperature calculation Activation compensation function of indoor fan Cold draft preventive function Timer f...

Page 15: ...aning operation Cleaning operation Pressed last Cooling dry Cooling dry Pressed first Cooling dry Cooling dry Pressed last Cleaning operation Cleaning operation Pressed first Cleaning operation Cleaning operation Pressed last Fan only Fan only Pressed first Fan only Fan only Pressed last Cleaning operation Cleaning operation Pressed first Cleaning operation Cleaning operation Pressed last Heating ...

Page 16: ...eration will be selected When room temperature reach set temperature commpressor will stop In case that the compressor stops for 15 minutes the Ts 1 Ts 1 Ta Cooling operation Monitoring Fan Heating operation C AUTO mode will reselect cooling or heating operation 5 DRY operation DRY operation is performed according to the difference between room temperature and the setup temperature as shown below ...

Page 17: ... 1 Indoor fan air flow rate The values of fan speed and air flow volume indicate on the table are measured when the louver is inclined downward Fan speed and air flow volume broadly vary with position of louver 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 co...

Page 18: ...M M H W8 L M 2 WA M H 2 WE Indication Fan speed Fan speed setup HEAT ON AUTO YES NO MANUAL TC 42 C Min air flow rate control Tc 52 51 42 41 Limited to Min WD tap Fan speed TC W8 W8 No limit 1 Fan speed M L x 1 4 L 2 Fan speed M L x 2 4 L 3 Fan speed M L x 3 4 L Calculated with linear approximation from M and L FAN AUTO FAN Manual In starting Until 12 minutes passed after operation start When 12 to...

Page 19: ...ompressor 4 According to the difference resulted from comparison of the correction value of Hz signal with the present operation Hz the inverter output and the commuta tion timing are varied 5 Change the compressor motor speed by outputting power to the compressor The contents of control operation are same in cooling operation and heating operation About Current release control Please refer to a s...

Page 20: ...pressor speed is kept Q zone When temperature of the indoor heat exchanger drops in the range from 48 C to under 55 C the compressor speed is kept Q zone 2 When temperature of the indoor heat exchanger rises to 55 C or higher the compressor speed is reduced P zone 3 When temperature of the indoor heat exchanger does not rise to 52 C or when it drops below to 48 C the capacity control operation ret...

Page 21: ... The angle of the louver is indicated as the louver closes fully is 0 1 Louver position in cooling operation mode COOL HEAT and the louver returns to the stored position when the next operation is performed Cooling Heating memory position The louver position can be arbitrarily set up by pressing FIX button 20 3 Swing Swing When pressing SWING bu tton dur Swing oper ing ation is perf oper o ation t...

Page 22: ...1 COOL min 30 minutes A B C A B C Time Compressor speed 0Hz A zone aHz B zone a to cHz C zone cHz 0 0 5 1 0 1 5 2 0 2 5 3 0 4 0 5 0 6 0 7 0 8 0 9 0 10 0 11 0 Room temp Set temp 3 5 3 0 2 5 1 5 1 0 TSC 1 0 2 0 5 5 1H 2H 11 10 7 6 5 4 3 2 1 OFF Dry Max 12 11 9 8 10 TA 6 0 6 5 3H 4H 5 0 4 5 4 0 2 0 0 5 0 5 12 9 8 Time Zone Frequency FAN Min Hz Fan speed depend on presetting and can change every speed...

Page 23: ... sound is heard and AUTO RESTART control is changed 3 When keeping RESET button pressed for 10 seconds or more Pi sound is heard and the temporary COOL operation starts 4 If the filter lamp goes on press RESET button to go off the filter lamp and then press RESET button again 5 To stop the temporary operation press the button again Filter lamp ON Press RESET button Did you press RESET button for 3...

Page 24: ... operation performed prior to the reception of the stop code 3 After the Self Cleaning operation has been performed for the specified period the unit stops operating Unit now performing cooling or dry operation Press STOP button Only timer indicator lights and Self Cleaning operation starts Time set now elapses Operation stops function During Self Cleaning operations The louver opens slightly The ...

Page 25: ...mbly 2 To cancel Self Cleaning operation 3 To set Self Cleaning operation Turn the power supply ON Press the RESET button located on the front panel of the indoor unit for more than 3 seconds After 3 seconds the unit beeps three times The Self Cleaning is cancelled Turn the power supply ON Press the RESET button located on the front panel of the indoor unit for more than 3 seconds After 3 seconds ...

Page 26: ...y the remote controller selection is set to A on all the indoor units There is no A setting display Setting the remote controller To separate using of remote control for each indoor unit in case of 2 air conditioner are installed nearly Remote Control B Setup 1 Press RESET button on the indoor unit to turn 2 Point the remote control at the indoor unit 3 Push and hold CHK button on the Remote Contr...

Page 27: ...urs Repeat pressing to select the hours If the COMFORT SLEEP button is pressed again means cancel comfort sleep mode Heating mode The preset temperature will drop down as show on ECO operation Item No 6 choose the operating hours Repeat Press the COMFORT SLEEP button to pressing to setect thehours If the COMFORT SLEEP button is pressed again means cancel comfort sleep mode 1hr 3hr 5hr or 9hr 1hr 3...

Page 28: ...ame as AUTO mode 3 Target temperature is 24ºC 4 Louver position is set as stored position of the operating mode 5 Fan is controlled as followings Mode POWER mark is indicated on the display of the remote controller and the unit operates as follows 1 Automatic operation The indoor unit operates in according to the current operation 2 Cooling operation remote controller does not change The indoor un...

Page 29: ... seconds Motions The unit is in operation The green indicator is on The unit stops operating The green indicator is turned off After approx three seconds The unit beeps three times If the unit is required to operate at this time press RESET button once more or use the remote controller to turn it on 1 The power supply to the unit must be ON The function will not set or reset if the power supply is...

Page 30: ...een indicator is turned off After approx three seconds The unit beeps three times The green indicator flashes for 5 seconds If the unit is required to operate at this time press RESET button once more or use the remote controller to turn it on 8 3 2 How to Set the Auto Restart Function To set Auto Restart Function proceed as follows 1 The power supply to the unit must be ON The function will not s...

Page 31: ...perature 8 4 Remote control 8 4 1 Remote Controller 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 retu...

Page 32: ... Timer Press Set the desired 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 activati...

Page 33: ...mp 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 p...

Page 34: ... 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 35: ...bottom right or bottom left Right Rear right Bottom right Rear left Bottom left Left 6 mm thick heat resisting polyethylene foam 1 Batteries Flat head wood screw Remote control holder Vinyl tape Apply after carrying out a drainage test Wireless remote control Saddle Extension drain hose Not available provided by installer Shield pipe Attach to the front panel Air filter Hook Installation plate Hoo...

Page 36: ...nd cap water proof 11 to the bottom plate of the outdoor unit before installing it A Air inlet Air outlet Drain outlet 600 mm 90 mm 125 mm 108 mm 28 mm 86 mm 102 mm 320 mm 2 5 m m Æ Parts name Refrigerant piping Liquid side 6 35 mm Gas side 9 52 mm Pipe insulating material polyethylene foam 6 mm thick Putty PVC tapes Part Code Q ty One each 1 One each 9 2 1 Optional installation parts 9 2 Installa...

Page 37: ...Part No Part No Part name Q ty 10 Flat head wood screw 3 1 x 25 s x 1 Others Name Owner s manual Installation manual Remote control holder x 1 4 Toshiba New IAQ filter L x 1 5 6 Battery cover x 1 Mounting screw 4 x 25 s x 6 7 8 Drain nipple x 1 9 11 The part marked with asterisk is packaged with the outdoor unit Flat head wood screw 3 1 x 16 s x 2 Cap water proof x 2 ...

Page 38: ... size have been changed to 1 2 UNF 20 threads per inch When purchasing a charge hose be sure to confirm the port size As pressure is high and gasification speed is fast it is difficult to read the indicated value by means of charging cylinder as air bubbles occur The size of opposite sides of flare nuts have been increased Incidentally a common wrench is used for nominal diameters 1 4 and 3 8 By i...

Page 39: ...ch as a stove Keep the remote control at least 1 m apart from the nearest TV set or stereo equipment This is necessary to prevent image disturbances or noise interference The location of the remote control should be determined as shown below Fig 9 3 1 45 45 75 Top view Indoor unit Reception range Reception range Remote control Indoor unit Remote control Side view 9 3 Indoor Unit 9 3 1 Installation...

Page 40: ...rews to install it Installation plate Keep horizontal direction How to connect the connecting cable Wiring of the connecting cable can be carried out 9 3 3 Wiring connection 1 Remove the air inlet grille Open the air inlet grille upward and pull it toward you 2 Remove the terminal cover and cord clamp 3 Insert the connecting cable according to the local cords into the pipe hole on the wall 4 Take ...

Page 41: ...ies 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 figure 9 and 10 to terminal by provided screws tigh...

Page 42: ...it on the left or right side of the front panal for the left or right connection and the slit on th bonttom left or right side of the front panel for the botto left or right connection with a pair of nippers Heat insulator Drain hose How to install the drain hose Firmly insert drain hose connecting part until hitting on a heat insulator and fix it with a screw How to remove the drain hose Fig 9 3 ...

Page 43: ...e Bend the connection pipe within a radius of 30 mm To connect the pipe after installation of the unit figure Fig 9 3 17 NOTE If the pipe is bent incorrectly the indoor unit may unstably be set on the wall After passing the connecting pipe through the pipe hole connect the connecting pipe to the auxiliary pipes and wrap the facing tape around them CAUTION Bind the auxiliary pipes two and connectin...

Page 44: ...e sloped downwards NOTE Hole should be made at a slight downward slant on the outdoor side Fig 9 3 20 2 Put water in the drain pan and make sure that the water is drained out of doors 3 When connecting extension drain hose insulate the connecting part of extension drain hose with shield pipe Fig 9 3 21 CAUTION Arrange the drain pipe for proper drainage from the unit Improper drainage can result in...

Page 45: ...PERATION dose not activate 1 2 RESET button 9 4 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 ...

Page 46: ...parts on the P C board by hand The new inverter 3DV inverter will be incorporated starting with this unit 3DV 3 shunt Discrete Vector control K The control circuitry has an uninsulated construction No 1 2 3 4 5 Troubleshooting Procedure First Confirmation Primary Judgment Judgment by Flashing LED of Indoor Unit Self Diagnosis by Remote Controller Judgment of Trouble by Every Symptom No 6 7 8 9 10 ...

Page 47: ...e components Sensor leads Do NOT lay the circuit board assembly flat K Precautions when inspecting the control section of the outdoor unit NOTE A large capacity electrolytic capacitor is used in the outdoor unit controller inverter Therefore if the power supply is turned off charge charging voltage DC280 to 380V remains and discharging takes a lot of time After turning off the power source if touc...

Page 48: ... 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 unit...

Page 49: ...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 OPERATION Green Flashing display 1 Hz OPERATION Green TIMER Yellow FILTER Orange Flashing display 5 Hz OPERATION Green FILTER Orange Flashing display 5 Hz OPERATION Green TIMER Yellow Flashing d...

Page 50: ...ton 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 10 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 ...

Page 51: ...e 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 3 After servicing press CLR button under check mode status and then send the check code 7F to the indoor unit The error code stored in memory is cleared Table 10 4 1 Block distinction Operation of diagnosis function Block Indoor P C board etc Not displayed Con...

Page 52: ...tion Block Outdoor P C board Not displayed Outdoor P C board Others including compressor Operation of diagnosis function Cause of operation Inverter over current protective circuit operates Short time Position detect circuit error or short circuit between windings of compressor Current detect circuit error Being out of place disconnection or short circuit of the outdoor heat exchanger sensor TE or...

Page 53: ...ATION lamp blinking NO YES NO NO YES YES Is it possible to turn on power supply by pressing button on remote control Does transmission mark on remote control flash normally and is its signal transmitted properly Remote control is defective Refer to 4 Remote Control Is fuse F01 of indoor control board blown Is voltage DC 12V or 5V indicated on rear of indoor control board normal Microcomputer is de...

Page 54: ...P C board is replaced Confirmation procedure YES YES NO NO To item of Power is not turned on Turn on power supply Does operation lamp flash Is wired correctly to white and black lead wires of terminal board Correct wiring 53 FILE NO SVM 12072 ...

Page 55: ...motor Does the fan rotate Change the setting of cooling to high fan Operation stops Shut off the power supply Motor control circuit failure IC31 Q301 or 12 V Switching power supply failure Does the cross flow fan rotate normally Is the rotation signal DC 5 V 0 V output between 2 gray lead wire and 3 brown lead wire of the motor connector CN33 when rotating the cross flow fan by hand in no operatin...

Page 56: ...ment of Trouble by Every Symptom AFN 220 20 4D Do not disconnect the connector while the fan motor is rotating For P C board side proceed to the item Only indoor fan does not operate 1 3 5 1 2 3 2 1 3 2 1 3 2 1 3 2 1 3 CN31 CN33 P C board WHI BLK RED BLK RED WHI BLU PUR GRY BLU PUR GRY Resistance value Position P C board Between 3 Black 1 Red Between 3 Black 5 White Between 1 Red 5 White 249 17 Ω ...

Page 57: ...indoor unit beep and operate Remote control is defective Does indoor unit start to operate by automatic restart function Does radio sound is affected by remote control when a signal is transmitted at distance of 5 cm from radio P C board is defective Keep indoor unit away from thyristor fluorescent light Avoid direct sunlight Replace P C board Replace batteries Normal operation Replace remote cont...

Page 58: ...transmission from indoor unit to outdoor unit is correctly performed based upon the follow ing diagram NOTE Measurement should be performed 2 minutes and 30 seconds after starting of the operation Be sure to prepare a diode for judgment Normal time Voltage swings between DC15 and 60V Inverter Assembly check 10 7 1 Abnormal time Voltage does not vary 2 Outdoor unit stops in a little while after ope...

Page 59: ...d gas if pressure is low Is connecter of coil connected to inverter Is coil of the pulse motor valve P M V correctly set Existence of condensation at outlet of P M V If there is condensation at outlet 1 4 inch Ø6 35mm valve side the valve is clogged 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 ...

Page 60: ...mary If fuse was blown be sure to check the electrolytic capacitor and diode block DB01 Connect discharge resistance approx 100Ω 40W or soldering iron plug between terminals of the electro lytic capacitor 500µF or 760µF of C14 with printed CAUTION HIGH VOLTAGE on P C board OK if 500µF or 760µF DC280 to 380V Remove CN300 while pushing the part indicated by an arrow because CN300 is a connector with...

Page 61: ...1 How to Check the P C Board Indoor Unit 1 Operating precautions 1 When removing the front panel or the P C board be sure to shut off the power supply breaker 2 When removing the P C board hold the edge of the P C board and do not apply force to the parts 3 When connecting or disconnecting the connectors on the P C board hold the whole housing Do not pull at the lead wire 2 Inspection procedures 1...

Page 62: ...ION TIMER FILTER PRE DEF Hi POWER 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 AC120V or higher voltage between red and black 2 Th...

Page 63: ...perature C TA TC TO TS TE TD 1 Sensor characteristic table 62 12V GND 5V 12V FILE NO SVM 12072 10 8 2 P C Board Layout TD Discharge temp sensor TA Room temp sensor TC Heat exchanger temp sensor TO Outdoor temp sensor TS Suction temp sensor TE Outdoor heat exchanger temp sensor ...

Page 64: ...Refer to 11 5 1 5 Measure the resistance value of each winding coil by using the tester Under normal temp 25 C Position 1 to 2 1 to 3 1 to 4 1 to 5 Resistance value 250Ω 7 Refer to 11 5 1 3 and 4 Under 20 C Disconnect the connector and measure resistance value with the tester Normal temperature Outdoor temperature sensor TO discharge temperature sensor TD suction temperature sensor TS outdoor heat...

Page 65: ...re show in continuity test by the tester C12 C13 C14 500µF 400V 2 Converter module 1 Turn OFF the power supply breaker 2 Discharge all three capacitors completely 3 Check that the normal rectification characteristics are shown in continuity test by the tester Case that product is good Pointer swings once and returns slowly When performing test once again under another polarity the pointer should r...

Page 66: ...of the outdoor fan motor 4 Motor drive circuit failure of the outdoor P C board 3 How to simply judge whether outdoor fan motor is good or bad NOTE However GND circuit error inside of the motor may be accepted in some cases when the above check is performed When the fan motor does not become normal even if P C board is replaced replace the outdoor fan motor If the resistance value between 1 Red le...

Page 67: ...hed 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 inspecting...

Page 68: ...cs 6 Take off three 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 3 pcs at the top side of the front panel to the rear plate 2 Tighten two screws Incomplete hanging or incomplete pressing may cause a dewdrops or generation of a fluttering sound FILE NO SVM 12072 2 Screws ...

Page 69: ...parts box assembly onto the claws on the back body Now attach the display unit Connect the connectors for the fan motor and louver motor 2 Secure the grounding wire using the fixing screw Insert the TC sensor into the sensor holder Be absolutely sure to loop the grounding wire and TC sensor leads once at the bottom 5 Disengage the display unit by simply pushing at the top of the display unit 6 Rem...

Page 70: ... the pipe holder from the rear side of the main unit 3 Remove two fixing screws at the left side of the end plate of the heat exchanger Remarks 4 Remove one fixing screw on the heat exchage fixing holder to separate the heat exchage from the back body 5 Remove right side of the end plate from two fixing rib while sliding slightly the heat exchanger rightward 2 screws Heat exchanger fixing holder S...

Page 71: ... Remove the two screws used to secure the bearing base 3 Remove the bearing base Caution at assembling If the bearing is out from the housing push it into the specified position and then incorporate it in the main body Remarks Two screws Bearing Bearing base FILE NO SVM 12072 ...

Page 72: ...ove 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 Motor cover Two screws on motor band Part name FILE NO SVM 12072 Reference condition of Fan Motor s assembly ...

Page 73: ...he 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 FILE NO SVM 12072 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 hooking claws of the motor b...

Page 74: ... power supply off to stop the operation of air conditioner 2 Remove the front panel 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 11 2 Microcomputer FILE NO SVM 12072 ...

Page 75: ...9 HORIZONTAL LOUVER 205 43T20325 CROSS FLOW FAN ASSEMBLY 218 43T79313 CAP DRAIN 206 43T11301 PIPE SHIELD 219 43T44409 REFRIGERANT CYCLE ASSEMBLY 207 43T83305 HOLDER REMOTE CONTROL 221 43T00598 PANEL SERVICE ASSEMBLY 208 43T60382 MOTOR CORD 222 43T80327 FILTER AIR R 209 43T82310 INSTALLATION PLATE 223 43T80328 FILTER AIR L 211 43T19333 HOLDER SENSOR 224 43T09482 GRILLE OF AIR INLET 212 43T09408 PIP...

Page 76: ... Part No No No No 401 43T69319 TEMPERATURE SENSOR 405 43T6V316 PC BOARD ASSY WRS LED 402 43T50306 TEMPERATURE SENSOR 406 43T6V335 PC BOARD 403 43T69320 TEMPERATURE SENSOR 407 43T60378 TERMINAL 404 43T62340 CORD CLAMP 408 43T60417 TERMINAL Description Description ...

Page 77: ... 56 FILE NO SVM 03005 TOSHIBA CARRIER THAILAND CO LTD ...

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