Toshiba RAS-B10U2FVG-E, Service Manual

Page 1: ...SERVICE MANUAL SPLIT TYPE Indoor Unit Console Heat PumpType RAS B10U2FVG E TR RAS B13U2FVG E TR RAS B18U2FVG E TR May 2018 R32 FILE NO SVM 18048 ...

Page 2: ...5 WIRING DIAGRAM 18 6 SPECIFICATIONS OF ELECTRICAL PARTS 19 7 REFRIGERANT CYCLE DIAGRAM 20 8 CONTROL BLOCK DIAGRAM 22 9 OPERATION DESCRIPTION 23 10 INSTALLATION PROCEDURE 57 11 HOW TO DIAGNOSE THE TROUBLE 65 12 HOW TO REPLACE THE MAIN PARTS 88 13 EXPLODED VIEWS AND PARTS LIST 95 FILE NO SVM 18048 2 ...

Page 3: ...d that a danger causing a death or serious injury of the repair engineers the third parties and the users due to troubles of the product after work when an incorrect work has been executed CAUTION Indicates contents assumed that an injury or property damage may be caused on the repair engineers the third parties and the users due to troubles of the product after work when an incorrect work has bee...

Page 4: ...lation tools are different from those used for the conventional refrigerant units Accordingly special tools are required for the new refrigerant R32 units For connecting pipes use new and clean piping materials with high pressure fittings made for R32 only so that water and or dust does not enter Moreover do not use the existing piping because there are some problems with pressure fittings and pos...

Page 5: ...GERATION CIRCUIT WILL BECOME ABNORMALLY HIGH AND IT MAY RESULT IN THE PIPE BURSTING AND POSSIBLE PER SONNEL INJURIES IN THE EVENT THAT THE REFRIGERANT GAS LEAKS OUT OF THE PIPE DURING THE SERVICE WORK AND THE INSTALLATION WORK IMMEDIATELY LET FRESH AIR INTO THE ROOM IF THE REFRIGERANT GAS IS HEATED SUCH AS BY FIRE GENERATION OF POISONOUS GAS MAY RESULT WARNING Never modify this unit by removing an...

Page 6: ... a room with a floor area large than Amin m2 How to get Amin m2 Amin M 2 5 x 0 22759 x h0 2 M is the refrigerant charge amount in appliance in kg h0 is the installation height of the appliance in m 0 6 m for floor standing 1 8m for wall mounted 1 0 m for window mounted 2 2 m for ceiling mounted Comply with national gas regulations CAUTION Exposure of unit to water or other moisture before installa...

Page 7: ...arth 4 Wires Includes earth Usable temperature range Indoor Cooling Heating o C Outdoor Cooling Heating o C Accessory Indoor unit Installation plate Wireless remote controller Batteries Toshiba New IAQ Filter Install screw Remote controller holder Pan head wood screw for Remote control holder Insulate pipe Installation manual Owner s manual Outdoor unit Drain nipple Water proof rubber cap The spec...

Page 8: ...nual describes about B U2FVG series indoor units only For the multi split outdoor unit to be combined refer to the service manual Outdoor unit SVM 18051 SVM 18052 SVM 18053 SVM 18020 RAS 2M18U2AVG E TR RAS 2M14U2AVG E TR RAS 5M34U2AVG E TR RAS 4M27U2AVG E TR RAS 3M26U2AVG E TR File name Heat Pump Model Combined outdoor unit model name Indoor unit model name RAS 3M18U2AVG E TR X X RAS 2M18U2AVG E T...

Page 9: ...aces where installation repairs or similar work on air conditioning equipment is performed 3 If a refrigeration gas leakage occurs during installation servicing be sure to ventilate fully If the refrigerant gas comes into contact with fire a poisonous gas may occur 4 When installing or removing an air conditioner do not allow air moisture dust or oil to remain in the refrigeration cycle Otherwise ...

Page 10: ...oints Nominal diameter 1 4 3 8 1 2 5 8 Reference outer diameter of copper pipe jointed mm 6 35 9 52 12 70 15 88 Minimum joint thickness mm 0 50 0 60 0 70 0 80 3 2 2 Processing of Piping Materials When performing the refrigerant piping installation care should be taken to ensure that water or dust does not enter the pipe interior that no other oil than lubricating oils used in the installed air wat...

Page 11: ... 5 0 to 0 5 0 to 0 5 0 to 0 5 Conventional flare tool Clutch type Wing nut type 1 0 to 1 5 1 5 to 2 0 1 0 to 1 5 1 5 to 2 0 1 0 to 1 5 2 0 to 2 5 1 0 to 1 5 2 0 to 2 5 Table 3 2 4 Dimensions related to flare processing for R22 Nominal diameter 1 4 3 8 1 2 5 8 Outer diameter mm 6 35 9 52 12 70 15 88 Thickness mm 0 8 0 8 0 8 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...

Page 12: ...orque for R32 is the same as that for conventional R22 Incidentally when the torque is weak the gas leakage may occur When it is strong the flare nut may crack and may be made non removable When choosing the tighten ing torque comply with values designated by manufacturers Table 3 2 7 shows reference values NOTE When applying oil to the flare surface be sure to use oil designated by the manufactur...

Page 13: ...clusive tools the following equipments which serve also for R22 are necessary as the general tools 1 Vacuum pump Use vacuum pump by attaching vacuum pump adapter 2 Torque wrench For Ø6 35 Ø9 52 3 Pipe cutter 4 Reamer 5 Pipe bender 6 Level vial 7 Screwdriver 8 Spanner or Monkey wrench 9 Hole core drill Ø65 10 Hexagon wrench Opposite side 4mm 11 Tape measure 12 Metal saw Also prepare the following e...

Page 14: ...e 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 the fo...

Page 15: ...lver 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 strength d...

Page 16: ...ux 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 pipe i...

Page 17: ...Indoor Unit 4 1 B10U2FVG series B13U2FVG series B18U2FVG series FILE NO SVM 18048 17 RAS B10 U2FVG E TR RAS B13 U2FVG E TR RAS B18 U2FVG E TR ...

Page 18: ... 1 2 1 2 2 5 5 6 6 3 4 1 3 4 1 3 2 1 Wireless Unit Assembly WP 021 CN381 WHI CN301 WHI CN201 WHI CN261 WHI CN401 RED CN51 WHI CN604 WHI CN601 WHI CN603 YEL CN602 BLU CN21 Main P C Board MCC 5068A Power Supply Circuit DC5V DC12V Fuse F01 T3 15A 250VAC CN501 CN03 CN01 4 5 6 1 1 2 CN801 R01 Varistor Line Filter Thermo Sensor TA Heat Exchanger Sensor TCJ Heat Exchanger Sensor TC Indoor Terminal Block ...

Page 19: ...nsor 10kΩ at 25 C 3 Heat exchanger temp sensor TC sensor 10kΩ at 25 C 5 Louver motor Output Rated 16 poles DC12V MP24Z3N ICF 340 41 1 DC340 41W Parts name 1 Specif ications Type 6 Dumper motor Output Rated 16 poles DC12V MP24Z3N 4 10kΩ at 25 C Heat exchanger temp sensor TCJ sensor FILE NO SVM 18048 19 ...

Page 20: ...at insulator Allowable height difference 10m Allowable pipe length Max 1 Min 1 Chargeless 1 Charge 1 1 Refer to the service manual of multi outdoor unit to be combined For RAS B18U2FVG Series Outer dia 12 7mm Thickness 0 8mm P Pressure measurement Gauge attaching port Vacuum pump connecting port Deoxidized copper pipe For RAS B10U2FVG Series RAS B13U2FVG Series 7 1 Refrigerant Cycle Diagram FILE N...

Page 21: ...e temp Indoor fan mode Outdoor fan mode Indoor Outdoor T1 C T2 C NOTES Refer to service manual of outdoor unit which combined 27 19 35 Compressor revolution rps Tempeature condition C Model name RAS Standard pressure P MPa Tempeature condition C Model name RAS Standard pressure P MPa Compressor revolution rps 20 7 6 B10U2FVG E TR B13U2FVG E TR B18U2FVG E TR FILE NO SVM 18048 21 ...

Page 22: ... Setting Louver AUTO Swing Louver Direction Setting REMOTE CONTROL FLOOR ON OFF ECO Heat Exchanger Sensor TC Room Temperature Sensor TA Infrared Rays Signal Receiver and Indication Functions Cold draft preventing Function 3 minute Delay at Restart for Compressor Fan Motor Starting Control Processing Temperature Processing Timer Weekly Timer Serial Signal Communication Clean Function Heat Exchanger...

Page 23: ...or heat exchanger and control for 4 way valve and outdoor fan 3 Contents of operation command signal Serial signal from indoor unit controller to outdoor unit controller The following three types of signals are sent from the indoor unit controller Operation mode set on the remote controller Compressor revolution command signal defined by indoor temperature and set temperature Correction along with...

Page 24: ...37 14 Pulse Modulating valve P M V control 38 15 Self Cleaning function 39 16 Selt Cleaning function release 40 17 Remote A or B selection 41 9 3 Auto Restart Function 4 7 9 3 1 How to Set the Auto Restart Function 47 9 3 2 How to Cancel the Auto Restart Function 48 9 3 3 Power Failure During Timer Operation 48 23 FILTER Indicator 43 9 4 Remote Control 49 9 4 1 Remote control and its functions 49 ...

Page 25: ...tion compensation function of indoor fan Cold draft preventive function Timer function Indoor heat exchanger release control Indoor fan motor Louver motor Outdoor unit Outdoor unit control Frequency control of inverter output Waveform composite function Calculation function Temperature calculation AD conversion function Quick heating function Delay function of compressor reactivation Current relea...

Page 26: ...door unit controls the outdoor fan motor compressor pulse Modulating valve and 4 way valve according to the operation signal sent from the indoor unit 3 AUTO operation Selection of operation mode As shown in the following figure the operation starts by selecting automatically the status of room temperature TA when starting AUTO operation 1 When reselecting the operation mode the fan speed is contr...

Page 27: ...g to the temperature difference between the room tempera ture and the setup temperature Tsc Setup temperature Tsc Set temperature on remote controller Ts 1 0 to 0 0 3 When the room temperature is lower 2 C or less than the setup temperature turn off the compressor 4 The time correction is performed every 8 minutes Fan Time TA speed correction C 12 35 37 49 W8 11 32 34 42 W6 10 30 31 36 9 27 28 30 ...

Page 28: ... exchanger temperature Fig 1 Fig 2 L L M M H W7 L M 2 WA M H 2 WD Indication Fan speed Fan speed setup COOL ON AUTO 2 5 TA Tsc C 2 0 1 5 1 0 0 5 Tsc a b c d e M WC 3 4 5 L W7 MANUAL 3 Fan speed M L x 3 4 L 4 Fan speed M L x 2 4 L 5 Fan speed M L x 1 4 L Linear appro ximation from M and L Hi Power Fan speed H WD 6 7 8 L W8 6 Fan speed H L x 3 4 L 7 Fan speed H L x 2 4 L 8 Fan speed H L x 1 4 L Line...

Page 29: ... mode is in stability A When Tsc 24 A is 24 and when Tsc 24 A is Tsc Tsc Set value H WE Line approximate M and SUL with TC SUL W2 Stop 46 46 TC 34 45 45 33 33 33 21 32 32 20 A 4 A 4 A 4 A 4 A 4 A 4 Fan speed MANUAL in starting Fan speed AUTO in stability Fan speed AUTO in starting 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 ...

Page 30: ...0 300 W4 260 216 270 228 340 300 W3 260 216 270 228 340 300 W2 SUL 240 198 250 210 320 282 W1 240 198 240 198 240 198 HEAT Item Operation flow and applicable data etc Description In starting and in stability FAN AUTO FAN Manual In starting Until 12 minutes passed after operation start When 12 to 25 minutes passed after operation start and room temp is 3 C or lower than set temp Room temp Set temp ...

Page 31: ...ording 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 4 Current release control Set temp Ts Room temp TA Correction of...

Page 32: ...ssor speed is kept Q zone When temperature of the indoor heat exchanger drops in the range from 46 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 50 C or when it drops below to 46 C the capacity control operation return...

Page 33: ...ld draft when the indoor heat exchanger sensor temperature TC is lower than 33 degrees In cooling operation and bi flow setting the air outlet is set only upper flow for pravinting the room from overcooling when the room temperature TA is nearing the setup temperature This function can be cancelled to AIR OUTLET SELECT button AIR OUTLET indication Air outlet is contorolled as below How to cancel t...

Page 34: ...the lower louver at standby mode control 1 Push AIR OUTLET SELECT button on the unit operation panel AIR OUTLET SELECT button 1 Purpose When something is dropped to inside of the unit from upper air outlet this function helps to remove something from lower air outlet 2 When lower louver is closed lower louver moves to open position and TEMPERATURE indicator displays OP OPEN during louver moving Wh...

Page 35: ...itrarily set pu by pushing FIX button of the remote control 1 Description The position is controlled as below control Upper 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 FILE NO SVM 18048 35 ...

Page 36: ... 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 6 0 TA Tsc 3H 4H 5 0 4 5 4 0 2 0 0 5 0 5 12 9 8 Time Zone Frequency FAN MinHz Fan speed depend on presetting and can change every speed 0 1 5 Time correction 1 ZONE 0 1 ZONE min 1 Hz a 20 c 1 The control target temperature increase 0 5ºC per h...

Page 37: ...sed for 10 seconds or more Pi sound is heard and the test COOL operation starts 4 If the filter lamp goes on press OPERTION button to go off the filter lamp and then press OPERTION button again 5 To stop the test operation press the button again Filter lamp ON Press OPERATION button Did you press OPERATION button for 3 seconds or more Did you press OPERATION button for 10 seconds or more Switch to...

Page 38: ...ischarge temp control 4 When defrost operation is performed the open degree of valve is adjusted accord ing to each setup conditions during preparation for defrost and during defrost operation 4 way valve is inversed 5 To turn off the compressor while the air conditioner stops by control of the thermostat or by remote controller adjust the open degree of valve to the setup value before stop of the...

Page 39: ...eration 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 ind...

Page 40: ...mer off function How to cencel Self Cleaning function To cancel the Self Cleaning function proceed as follows Press and hold MODE button on opreation panel for more than 10 seconds less than 20 seconds Lower airoutlet OPEN or CLOSE OPEN or CLOSE depend on airoutlet selection depend on airoutlet selection OPEN or CLOSE depend on airoutlet selection After holding about 10 seconds the air conditioner...

Page 41: ... is set to A on all the indoor units There is no A setting display To separate using of remote control for each indoor unit in case of 2 air conditioner are installed nearly Remote Control B Setup 1 Push and hold button on the Remote Control by the tip of the pencil Note 1 Repeat above step to reset Remote Control to be A 2 Remote Control A has not A display 3 Default setting of Remote Control fro...

Page 42: ...lect 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 9 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 3hr 5hr or 9 hr 19 Short T...

Page 43: ...eived even if the air conditioner was OFF 2 Operation mode is set according to room temperature the same 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 a...

Page 44: ...ference between the set temperature of the remote control and the room temperature is wide due to the installation condition etc the set 2 Description How to change the set temp correction 1 Operate the air conditioner and select cooling or heating mode The set temp correction can t be changed at standby mode 2 Push and hold AIR OUTLET SELECT button on the unit operation panel Set temp correction ...

Page 45: ...nditioner is operationg or not OPERATION button 2 After holding 20seconds beep sounds is heard and OPERATION indicator flashes for 5seconds Release OPERATION button OPERATION indicator 3 Push OPERATION button to stop temporary operation Set Auto restart function again How to cancel Outdoor Quiet control 1 Push and hold OPERATION button for 20seconds OPERATION button 2 After holding 20seconds beep ...

Page 46: ...0seconds beep sounds is heard and OPERATION indicator flashes for 5seconds Release OPERATION button OPERATION indicator How to cancel Outdoor Quiet control 1 Push and hold OPERATION button for 20seconds OPERATION button 2 After holding 20seconds beep sounds is heard OPERATION indicator doesn t flash Release OPERATION button After pushing OPERATION button air conditioner stops operation After 3seco...

Page 47: ... operating conditions in the event of a power supply being accidentally shut down The operation will resume without warning three minutes after power is restored This function is not set to work when shipped from the factory Therefore it is necessary to set it to work 9 3 1 How to Set the Auto Restart Function To set the auto restart function proceed as follows The power supply to the unit must be...

Page 48: ...start Function To cancel auto restart function proceed as follows Repeat the setting procedure the unit receives the signal and beeps three times The unit will be required to be turned on with the remote control after the main power supply is turned off When the system is on stand by not operating When the system is operating 9 3 3 Power Failure During Timer Operation When the unit is turned off b...

Page 49: ... ONE TOUCH Press the ONE TOUCH button for fully automated operation that is customised to the typical consumer preferences in your region of the world The coutomised 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 ...

Page 50: ...Set the timer Press CLR Cancel the timer Press Cancel the timer CLR Press ON Set the ON timer Press SET Press OFF Set the OFF timer Press SET button during the or mark flashing 1 1 2 3 2 3 3 4 Everyday timer allows the user to set both the ON OFF timers and will be activated on a daily basis Setting Everyday Timer During the every day timer is activation both arrows are indicated or 6 FLOOR WARMIN...

Page 51: ...tion may not provide adequate cooling or heating due to low sound features 13 COMFORT SLEEP OPERATION To save energy while sleeping automatically control air flow and automatically turn OFF Press COMFORT SLEEP Select 1 3 5 or 9 hrs for OFF timer operation 14 SLEEP TIMER OPERATION To start the sleep timer OFF timer operation Press SLEEP Select 1 3 5 or 9 hrs for OFF timer operation Press CLR to can...

Page 52: ...lamp will blink for 5 seconds 17 OPERATION AND PERFORMANCE 1 Three minute protection feature To prevent the unit from being activated for 3 minutes when suddenly restarted or switched to ON 2 Preheating operation Warm up the unit for 5 minutes before blowing warm air 3 Warm air control When the room temperature reaches the set temperature the fan speed is automatically reduced and the outdoor unit...

Page 53: ...n case of 2 air conditioners are installed nearly Remote Control B Setup 1 Push and hold CHK button on the Remote Control by the tip of the pencil 00 will be shown on the display 2 Press MODE during pushing CHK B will show on the display and 00 will disappear and the air conditioner will turn OFF The Remote Control B is memorized Note 1 Repeat above step to reset Remote Control to be A 2 Remote Co...

Page 54: ...less than 20 seconds 4 beeps will sound then 1 indication at TEMPERATURE indicator will light up for 5 seconds For return to the former status press and hold AIR OUTLET SELECT button for more than 4 seconds once again In this time 4 beeps will sound then 0 indication at TEMPERATURE indicator will blinks for 5 seconds 22 AIR INLET GRILLE MANTENANCE Wash the air inlet grille with water using the sof...

Page 55: ...hen holding down the button for more than 3 seconds while the mark is flashing Press another button to turn off the mark 8 ECO indicator Indicates when the ECO is in activated Press the ECO button to start and press 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 cont...

Page 56: ...function a beep will sound and then 3 seconds later 3 beep sound may occur The indicator button will be invalid while the child lock function is activated When press the button 1 beep will sound Operation with remote control during the CHILD LOCK function works This function is cancelled when the power supply is off or failure Dry upper only Heating Upper Lower Upper Upper Lower On cooling operati...

Page 57: ...t rear right right bottom right or bottom left Cut the piping hole sloped slightly Right Rear right Left Bottom right Rear left Bottom left 6 Mounting screw 8 Insulation sheet 2 Wireless remote control 8 mm thick heat resisting polyethylene foam Insulate the refrigerant pipes separately with insulation not together In case of right or left piping cut dot line area A C L Loading Batteries 1 Remove ...

Page 58: ...llation Parts A Parts name Refrigerant piping Liquid side 6 35 mm Gas side 9 52 mm Pipe insulating material polyethylene foam 8 mm thick Putty PVC tapes Part Code Q ty One each 1 One each RAS B10 13U2FVG Series 12 70 mm RAS B18U2FVG Series B C FILE NO SVM 18048 58 ...

Page 59: ...le x 1 10 2 2 Accessory and installation parts 10 AUTO AUTO FIX PRESET ONE TOUCH SWING FLOOR TIMER ON FILTER CHK CLOCK OFF SLEEP SET CLR Hi POWER ECO QUIET COMFORT SLEEP MODE TEMP FAN Mounting screw 4 x 25 lx 8 Flat head wood screw 3 1 x 16 lx 2 Filter x 2 9 8 7 Cap waterproof x 2 B Label x 2 for Multi model 11 The part may differ from that shown The number of parts may differ by model The part is...

Page 60: ...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 increas...

Page 61: ... pipe hole brim ring sold separately A place which provides the spaces around the indoor unit as shown in the diagram A place where there are no obstacles near the air inlet and outlet A place which allows easy installation of the piping to the outdoor unit A place which allows the front panel to be opened In case of block brick concrete or similar type walls make 5 mm holes in the wall Insert cli...

Page 62: ...he drain hose into a wavy shape Do not put the drain hose end into water Do not put the drain hose end in the drainage ditch Drainage 1 Run the drain hose sloped downwards Wiring connection Wiring of the connection cable is necessary to remove the front panel 1 Remove the terminal cover and cord clamp 2 Insert the connecting cable according to the local rule into the pipe hole on the wall 3 Take o...

Page 63: ...re 800 or more Wall Floor 670 or more 20 to 30 240 to 250 Floor Wall Side view Unit mm 4 In case of lattice establishment Follow the following figure make sure to keep enough distance between lattice frame and wall Be sure to switch to wall burying mode The lattice should be make of wood Between the air inlet and outlet should be devided with partition board Be sure to establish the open part for ...

Page 64: ...hown on the display 2 Press B will show on the display and 00 will during pushing disappear and the air conditioner will turn OFF The Remote Control B is memorized Note 1 Repeat above step to reset Remote Control to be A 2 Remote Control A has not A display 3 Default setting of Remote Control from factory is A Unit B setup Press and hold MODE button for more than 20 seconds When A setup changed to...

Page 65: ...agrams attached to the indoor outdoor units Table 11 1 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 Troubleshooting Procedure Check Code 1C and 1E How to Diagnose Trouble in Outdoor Unit How to Check Simply the Main Parts How to Simply Judge Whet...

Page 66: ... 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 indicator of the indoor unit flash...

Page 67: ...tioner 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 displ...

Page 68: ...ll 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 Beep Beep Beep Note the check code on the display of th...

Page 69: ...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 70: ...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 71: ...hes 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 All OFF Flashes after error is detected 4 times 1 Check sensors TE TS connection In case of sensors and it s connection is normal check the inverter P C board 2 Check 4way valve operation position In case TE TS detected temperature relationship are different f...

Page 72: ...comes 4 8 11 or 18 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 including unit has been sent when operates error is detected compressor operation start But after continue Flashing stop that signal is stop some time O...

Page 73: ...etected 4 times 1 Check sensors TD 2 Check refrigerant amount 3 In case of P M V exists Check P M V by measure the resistance of the coil and confirm its operation 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 though operation Hz is error is detected decreased to minimum limit 8 times ...

Page 74: ...d Outdoor unit Instantaneous power failure Some protector hardware of the outdoor unit open circuit of signal Signal circuit of indoor P C board or outdoor P C board is failure in some period TE TC high tmperature TE for cooling operation TC for heating operation 11 times 4 8 or 11 times When first error is detected error is count as 1 time then once operation is stop and re started After re start...

Page 75: ...C12V or 7V 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 CN301 1 3 Does fan motor connector between CN301 1 3 short circuit Item by symptoms Operation Check Item Considerable principle cause Measures Parts R01 R02 DB01 C01 C03 IC101 and T101 are defective Remote...

Page 76: ...onnector CN301 Check this condition within 15 seconds after starting unit Start to operate the indoor unit in except heating operation At this time is it possible to detect DC 1V or more between 5 and 3 of motor connector CN301 Is it possible to detect DC 310 340V between 1 and 3 of motor connector CN301 Motor connection condition Is it possible to detect DC 15V between 4 and 3 of motor connector ...

Page 77: ...evel to HIGH Is it possible to rotate cross flow fan by hand properly Fan motor operates normally Replace bearing of cross flow fan YES YES YES NO NO NO Does check cross flow fan bearing normal condition Replace indoor fan motor Replace main P C board Does check display on remote show high Change the new PC board Does fan speed change Replace remote Replace motor NO NO NO YES YES YES A B FILE NO S...

Page 78: ...n motor automatically starts to rotate by turning on power supply Cause The IC is built in the indoor fan motor Therefore the P C board is also mounted to inside of the motor If the P C board is soldered imperfectly or the IC is defective the fan motor may automatically rotate by turning on power supply Inspection procedure 1 Remove the front panel Remove 4 screws 2 Remove the cover of the indoor ...

Page 79: ...ible when setting the temporary switch of the air conditioner main unit to TEST RUN or TEMPORARY AUTO Can any signal tone be heard in a transistor radio when transmitting within 5 cm distance from the radio P C board is failure Replace P C board Is operation possible when the transmitter is moved nearer to the infrared signal receiver of the air conditioner Battery life Replace the batteries Dose ...

Page 80: ...nsmission 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 11 7 1 Abnormal time Voltage does not vary 2 Outdoor unit stops in a little while after operat...

Page 81: ...ure 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 indoor heat ex...

Page 82: ...pply Check 25A fuse F01 Remove connector of compressor Replace control board Check terminal Voltage of electrolytic capacitor are in Voltage Rate Turn ON power Supply NG 10 x 1 414 Replace control board NO Cooling 17 C Connect discharge resistance approx 100Ω 40W or soldering iron plug between terminals of the electro lytic capacitor 500µF or 760µF Discharging position Discharging period 10 second...

Page 83: ...er supply Replace outdoor fan motor NO Replace compressor Replace control board Replace compressor YES Does compresser operate normally Turn OFF power supply Check compressor winding resistance correct is in rate A NO NO YES NO Remove outdoor fan connector Check winding resistance by ohmmeter are correct Check rotor locking by rotate with hand Can it rotate FILE NO SVM 18048 83 ...

Page 84: ...he 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 louv...

Page 85: ... whether or not the com pressor operates 2 Check whether or not the OP ERATION indicator flashes 1 Check whether or not the com pressor operates 2 Check whether or not the OP ERATION indicator flashes 1 Check it is impossible to detect the voltage AC120V or higher voltage between red and black 2 The motor does not operate or the fan motor does not rotate with high speed But it is possible to recei...

Page 86: ...ensor characteristic table 100 30 40 50 60 70 80 90 20 10 0 0 10 20 30 40 50 s Resistance value Re Temperature C TD Discharge temp sensor TA Room temp sensor TC and TCJ Heat exchanger temp sensor TA TC TCJ TD FILE NO SVM 18048 86 ...

Page 87: ... 20 C 25 C 30 C 40 C 20 7 12 6 10 0 7 9 4 5 5 4 3 2 1 White Yellow Yellow Yellow Yellow 5 4 3 2 1 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 250 20 Refer to 11 5 1 3 and 4 2 3 Remote controller Louver motor Damper motor MP24Z3N 4 Indoor fan motor Heat exchanger TCJ sensor ICF 3...

Page 88: ...e 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 the cir cuitry wear rubber gloves to avoid contact with the live part...

Page 89: ... conector 9 Remove screw for earth lead from fan motor base 10 Remove screw for E box 11 Pull the upper part of the E box 11 Lift a E box in the upward for take off from the hook 1 Screw for E box cover Tube TCJ sensor TC sensor 5 TCJ sensor 5 TC sensor 4 The screw for display base 2 Screws for drain guide 4 pcs 3 Screw for earth lead 8 Damper motor connector 6 Fan motor connector 7 Louver motor c...

Page 90: ...eat exchanger 4 pcs Electrical parts How to arrange the lead Box assembly Shown in the picture E box Heat exchanger 1 Take off the pipe holder Refrigerant cycle assembly 2 Remove screws for heat exchanger 4 pcs Horizontal 1 Open a horizontal louver outward and louver stretch the arm of louver base same as the direction in the picture FILE NO SVM 18048 90 ...

Page 91: ...er base assemble Insert the rib of the louver base into the slot of back body same as the picture Bell mouth 1 Remove screws for bell mouth 4 pcs Drain pan and 1 Remove screws for drain pan 2 pcs damper base 2 Remove screws for damper base 2 pcs Screws for louver base 2 pcs Louver base rib Back body slot Screws for bell mouth 4 pcs Screw for drain pan Screws for damper base 2 pcs Screw for drain p...

Page 92: ...der and take off the motor holder 2 Take off the lead cover Attention for motor holder assemble 1 Arrange the earth lead and fan motor lead 2 Adjust the motor axis to the center of the motor holder then fix screws 4 pcs Fan motor A method to take off a fan motor in a condition taking on a heat exchanger 1 Take off pipe holder and remove screws for heat exchanger refer to 2 Remove screws for the be...

Page 93: ...No Part name Procedure Remarks Fan motor 3 Remove the flange nut and turbo fan refer to 4 Remove screws for motor holder and lead cover refer to FILE NO SVM 18048 93 ...

Page 94: ...y 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 12 2 Microcomputer P C board layout FILE NO SVM 18048 94 ...

Page 95: ...6309 211 43T44634 226 43T83003 FRONT PANEL ASSY INLET GRILLE ASSY AIR FILTER BACK BODY ASSY MOTOR BASE ASSY FAN MOTOR ASSY TURBO FAN ASSY MOTOR HOLDER LEAD COVER BELL MOUTH ASSY REFRIGERANT CYCLE ASSY FOR RAS B10U2FVG E TR REFRIGERANT CYCLE ASSY FOR RAS B13U2FVG E TR REFRIGERANT CYCLE ASSY FOR RAS B18U2FVG E TR HOLDER SENSOR DRAIN GUIDE UP DRAIN GUIDE DOWN SHIELD PIPE DRAIN PAN ASSY HOSE DRAIN DAM...

Page 96: ...3T6V567 403 43T50332 407 43T6V568 404 43T50333 407 43T6V569 PCBOARDASSY WRS LED PCBOARD FORRAS B10U2FVG E TR PCBOARD FORRAS B13U2FVG E TR PCBOARD FORRAS B18U2FVG E TR 405 43T62003 TERMINAL 3P SENSOR THERMOSTAT SENSOR HEAT EXCHANGER SENSOR HEAT EXCHANGER CORD CLAMP Description Description FILE NO SVM 18048 96 ...

Page 97: ...144 9 MOO 5 BANGKADI INDUSTRIAL PARK TIVANON ROAD TAMBOL BANGKADI AMPHUR MUANG PATHUMTHANI 12000 THAILAND ...