Toshiba RAS-07EAH, Service Manual

Page 1: ...SERVICE MANUAL AIR CONDITIONER SPLIT WALL TYPE FILE NO A10 9508 PRINTED IN JAPAN Dec 1995 S TOSHIBA RAS 07EKH RAS 07EAH RAS 09EKH RAS 09EAH ...

Page 2: ...8 3 Names and Functions of Indicators on Remote Controller 19 8 4 Handling the Remote Controller 19 8 5 Automatic Operation 21 8 6 Heating Cooling Fan Only Operation 22 8 7 Dry Operation 23 8 8 Timer Operation 23 8 9 ADJUSTING AIR FLOW DIRECTION 25 8 10 FAN ONLY Operation 27 8 11 COOL Operation 27 8 12 HEAT Operation 28 8 13 ECONO Mode 28 8 14 DRY Operation 29 8 15 AUTO Operation 29 8 16 Cool Airf...

Page 3: ...ight Condenser type Outdoor fan type Air flow volume Fan motor output Compressor Safety device Auto louver Usable outdoor temperature range Indoor H M L Outdoor 220 230 240V Name of refrigerant Rated volume Gas side size Connection type Liquid side size Connection type Maximum length of one way Maximum height Indoor unit higher Outdoor unit higher Outer diameter Height Width Depth High fan Medium ...

Page 4: ...ondenser type Outdoor fan type Air flow volume Fan motor output Compressor Safety device Auto louver Usable outdoor temperature range Indoor H M L Outdoor 220 230 240V Name of refrigerant Rated volume Gas side size Connection type Liquid side size Connection type Maximum length of one way Maximum height Indoor unit higher Outdoor unit higher Outer diameter Height Width Depth High fan Medium fan Lo...

Page 5: ...utdoor unit inlet air temperature JIS C9612 1994 DB WB DB WB Note 2 CHARGELESS No additional refrigerant required This air conditioner accepts a connection piping length of up to 10m and a head of up to 5m There is no need to add the refrigerant as long as the total length of the connection piping is up to 10m Heating 20 C 7 C 6 C ...

Page 6: ...are ø9 52 Front panel Back body 155 Wireless remote controller Remote controller holder 55 136 16 59 6 5 112 8 ø8 ø10 659 450 346 44 3 20 21 20 265 231 40 30 40 30 2 ø65 120 or more Minimum distance to wall Piping hole Detail of installing dimensions of the main unit Hanger 40 or more Minimum distance to ceiling 106 Center line Installation plate center line Installation plate outline 790 289 106 ...

Page 7: ...525 530 5 Fan guard ø420 268 111 770 59 89 TOSHIBA 200 5 11 Electric parts cover 250 Access for charging A 600 R10 36 50 230 216 25 ø6 Hole ø11x14 Hole Detail Drawing A View Z Z 54 62 Mounting dimension of anchor bolt 600 230 Inlet port 100 or more 400 or more Outlet port Center port For anchor bolt ø8 ø10 4 ø11x14 Long holes Visible outline of the product 600 or more Minimum distance of the wall ...

Page 8: ...tion up down louver hori zontally by hand 4 Slightly open the lower part of the front panel then pull the upper part of the front panel toward you to remove it from the rear plate Fig 3 2 Removing the front panel Caution When Connecting the Connecting Cable When connecting the connective cable follow the instructions below 1 Remove the front panel Fig 3 3 Open it upward by putting your finger on t...

Page 9: ... 3 7 Note If cooling dry operation is made without push ing the air outlet dew can be attached on the front panel surface In addition a gap between the front panel and the body will become wider spoiling the appearance 3 1 3 Precautions for Refrigerant Piping 1 Under side connection with piping Fig 3 8 1 Cut out the knockout piece from the right below of the rear plate with a knife etc Smooth the ...

Page 10: ...g tape around them 3 For left hand connection with piping bend the pipes as shown in Fig 3 11 Fig 3 11 Note Bend the connection pipe so that the distance between the pipe and the wall be 43 mm or less 3 2 Flaring 3 2 1 Pipe Cutting 1 Cut the pipe little by little advancing the blade of pipe cutter slowly Fig 3 12 Note For fine work do not advance the blade by force in order to prevent distortion o...

Page 11: ... to remove burrs to avoid unevenness on the flare face which will cause gas leaks Cover the pipe end with a polyethylene bag and on sheet Fig 3 15 3 2 3 Point of Flaring 1 The exact length of pipe protruding from the face of the flare die is determined by the flaring too Fig 3 16 Note Too long a protrusion of pipe from the flaring tool will result in too long a flare If this happens the flare nut ...

Page 12: ...pe close to the air conditioner unit so both faces fit well Note Forcing to tighten the nut without the center axis coincided causes gas leaks Fig 3 22 2 Use a torque wrench and spanner to tighten or untighten the flare nut Tightening should be done by finger first then use the torque wrench A torque wrench helps to provide adequate torque for tightening Fig 3 23 Note Insufficient tightening cause...

Page 13: ...DOOR IC03 CN24 CN12 6 5 4 3 1 2 3 1 2 1 3 2 6 5 4 1 3 2 BLU PNK YEL ORN RED BRW CN31 CN29 C T T01 1 2 3 1 2 3 5 3 1 5 3 1 BRW YEL BLK WHI IC GRY RED RUNNING CAPACITOR PTH TH01 FAN MOTOR THERMAL PROTECTER 90 C CN17 3 1 2 3 1 2 RED BLK WHI 3 1 2 3 1 2 PJ18 CN01 INFRARED RAY RECEIVE PARTS THERMO SENSOR TA CN03 HEAT EXCHANGER SENSOR TC CN06 CN05 CN13 CN10 COLOR IDENTIFICATION BRW BROWN RED RED WHI WHI...

Page 14: ...tor Running capacitor For compressor Solenoid coil Overload relay Type PH70T1 4C UE6 21A5P EEP2G155HQA104 SK 40CMF15UT LB60012 J MRA99259 9201 Specifications Output Rated 500W 2 pole 1 phase 220 240V 50 Hz Winding resistance Ω at 20 C Output Rated 18W 6 pole 1 phase 220 240V 50 Hz Winding resistance Ω at 20 C 400V AC 1 5µF 400VAC 15µF AC 200 240V AC 200 240V Red Black 4 46 White Black 6 55 Red Bla...

Page 15: ...2 4 High Low High High High Low Indoor 20 27 20 27 19 32 23 21 15 Outdoor 7 6 21 15 10 10 35 24 43 26 21 15 Fig 6 1 Table 6 1 Model Standard High temperature Low temperature Standard High temperature Low temperature Cooling Heating Mark means check points of Gas Leak 0 37m Connecting pipe 9 52 TI P O D 9 52mm Packed valve 9 52 Heating Cooling Compressor O D 6 35mm Heating Cooling 4 way valve Heati...

Page 16: ...TOP Main Unit Control Panel Functions Louver Control 3 minute Delay at Restart for Compressor Motor Revolution Control Processing Temperature Processing Timer C P U 50Hz input DC5V Operation Display Compressor ON OFF Signal Phase Output Timer Display ECONO Sign Display PRE DEF Sign Display Indoor Fan Motor Outdoor Fan Motor Compressor Louver Motor 4 Way Valve Power Relay Relay Driver Louver Driver...

Page 17: ...o COOL 1 The air conditioner operates in the cooling mode at a low fan speed Note If the TEMPORARY switch is set to AUTO or COOL the remote controller is not usable Fig 8 2 8 2 Functions on Remote Controller a Infrared signal emitter Transmits a signal to the indoor unit b START STOP button Push the button to start operation A receiving beep is heard Push the button again to stop operation A recei...

Page 18: ... ditioner operation push this button A receiving beep is heard While this button is kept depressed the re ceiving tone continuously sounds h Off timer button OFF Push this button to set the OFF timer i On timer button ON Push this button to set the ON timer j Reserve button RSV Push this button to reserve timer settings A receiving beep is heard k Cancel button CNL Push this button to cancel on ti...

Page 19: ...ig 8 4 all displays are indicated for the sake of clarity During operation only the relevant dis plays will be shown on the remote controller Fig 8 4 8 4 Handling the Remote Controller 8 4 1 Location of the Remote Controller Keep the remote controller where its signals can reach the receiver of the air conditioner a distance of 7m is allowed Fig 8 5 8 4 2 Remote Controller Mounting Fixture A mount...

Page 20: ...ere is no receiving beep from the indoor unit or if the transmission indication lamp on the remote control unit fails to light CAUTIONS The air conditioner will not operate if curtains doors or other materials block the signal from the remote controller to the indoor unit Prevent any liquid from failing into the remote controller Do not expose the remote controller to direct sunlight or heat If th...

Page 21: ...erature and operation starts after approxi mately 3 minutes Stop START STOP button Push this button again to stop the air conditioner Table 8 1 Room temperature of operation The set temperature 1 C or higher when hot The set temperature 1 C to 1 C The set temperature 1 C or lower when cool Cooling operation Fan only operation Heating operation Performs the cooling operation at a tempera ture 1 C h...

Page 22: ...r condi tioner The OPERATION lamp green on the display panel of the indoor unit lights The operating mode is selected in accordance with the room temperature and operation starts after approxi mately 3 minutes If you select FAN ONLY mode the unit will start immediately Stop START STOP button Push this button again to stop the air conditioner Fig 8 10 Note The FAN ONLY mode does not control tempera...

Page 23: ...indicates the time remaining available The time indicated on the remote controller changes accordingly 1 ON or OFF TIMER button Push the ON or OFF TIMER buttons as re quired Each time the button is pressed the timer setting changes and set time flashes The indication changes as follows 0 5 1 0 1 5 2 0 3 0 23 24 Hr 2 Reserve button RSV Push this button Check that the TIMER lamp yellow on the displa...

Page 24: ...useful when you wake up in the morning or when you return home The air conditioner will automatically start operating at the time set Example To turn on the air conditioner 5 hours later 1 Continue pushing the ON TIMER button un til you get 5 0 2 Push the RSV button Fig 8 14 8 8 2 Example of Timer Setting 1 OFF TIMER Operation Stop The OFF TIMER feature is useful when you go to sleep The air condi...

Page 25: ...icated Fig 8 17 Note In the Cool or Dry operation remember not to continue the downward air flowing for a long time to avoid conceivable dewing on the louver sur face and resultant dripping trouble It is also possible to adjust the air flow direction by the remote controller even when the wireless auto louver is in use but once the air conditioner operation was stopped and restarted thereafter the...

Page 26: ...controller 2 To stop the function push the AUTO button again 3 To change the swing direction push the SET but ton Fig 8 20 CAUTIONS The SET and AUTO buttons will be disabled when the air conditioner is not in operation in cluding when the ON TIMER is set Do not operate the air conditioner for long hours with the air flow direction set downward during the cooling or dry operation Otherwise con dens...

Page 27: ...Table 8 2 Manual setting of FAN SPEED 8 11 COOL Operation The remote controller s MODE button is set to the COOL position 1 Once the setting is made the operation mode is memorized in the microcomputer so that the same operation can be effected thereafter simply by pushing the START STOP button 2 Relay RY07 RY08 is turned on to energize the outdoor unit and a cool operation is carried out The indo...

Page 28: ...comes close to the temperature setting the vertical louver might close once and then open again 8 12 2 Cool Air Flow Control 1 If the indoor heat exchanger temperature de tected by the indoor heat exchanger sensor is 20 C or below the indoor fan stops and if the temperature rises to 32 C or above the fan is restarted 8 13 ECONO Mode The remote controller s ECONO button is pushed and ECONO display ...

Page 29: ...erature at which operation is to start as shown in Fig 8 27 The Fan mode will continue until room tempera ture reaches a level at which another mode is selected 8 15 1 Temporary Auto When the TEMPORARY switch is set to AUTO the set temperature is fixed at 24 C and controlled in ac cordance with the chart shown in Fig 8 27 OFF period a 4 min 5 min 6 min ON period b 6 min 5 min 4 min Relation betwee...

Page 30: ...hanger sensor TC Fig 8 29 8 16 Cool Airflow Prevention Control 1 When control is performed with a thermostat and the thermostat is set to off the indoor fan stops operating and restarts at the ultra low speed af ter 2 minutes and 20 seconds Fig 8 30 2 When the heat operation starts the indoor fan is kept off until the indoor heat exchanger tempera ture reaches a set temperature Fig 8 31 3 As soon ...

Page 31: ...frost Operation When the compressor current becomes 5 5A or more during defrost operation the defrost operation stops and the heat operation restarts The current sensor detects the compressor current The defrost opera tion continues for at most 6 minutes DEFROST LAMP During defrost operation the PRE DEF lamp is on and the indoor and outdoor fans are off The compressor start protection timer is int...

Page 32: ...f the air conditioner it is not a failure of the unit Misleading but good operations Table 9 1 Operation of air conditioner When the POWER plug socket of the indoor unit is inserted the OPERATION lamp on the setting indication part flashes Fan speed remains unchanged in teh dry mode Room temperature is in the range under which the compressor is turned off but the compressor will not stop The compr...

Page 33: ... OPERATION display flashing 5 Hz OPERATION and TIMER display flashing 5 Hz OPERATION TIMER and PRE DEF display flashing 5 Hz OPERATION TIMER and PRE DEF display flashing Check code Self diagnosis Power failure When power is on Thermo sensor TA short break Heat exchanger sensor TC short break Indoor fan lock abnormality of indoor fan IC03 D15 short break Indoor PC board failure Thermal fuse is blow...

Page 34: ...e setting temperature is displayed on the display and other display is turned off 2 Selecting ordinary mode Push the all clear button ACL on the rear bottom of the wireless remote control with a tip of pencil for more than 3 seconds Make sure the operation mode display wind volume display clock display and setting temperature display are turned on and of the clock display is blinking Cautions when...

Page 35: ...des is con ducted with procedures shown below a Enter the service mode and make sure the off timer display of the remote control shows b Operate the ON OFF key and make sure the timer lamp on the display section is flashing 5 Hz c At the same time also make sure the opera tion lamp is also flashing This shows that the protection circuit on the indoor PC board is working d Operate the TEMP key and ...

Page 36: ...riger ant cycle trouble Heat exchanger sensor off break short Overload relay break Air conditioner status Continued operation Continued operation All off Continued operation All off All off Diagnosis function Judgement and action Check thermo sensor If it is OK check PC board Around sensor circuit Check heat exchanger sensor If it is OK check PC board Around sensor circuit Check motor Replace PC b...

Page 37: ...ry side of the power source transformer Does the transmission indicator of the remote control blink normally and is the transmission really performed Is 12V AC supplied to the secondary side of the power transformer Remote control is defective Replace YES NO Power transformer is defective YES Microcomputer is defective Refer to above Preliminary checks Or there is a defect before the power transfo...

Page 38: ...See Power cannot be turned on YES NO Turn the power ON Does the OPERATION lamp flash Is the photocoupler IC03 normal See Power cannot be turned on Is any voltage supplied to the fan motor Microcomputer is defective PC board is defective Replace MF capacitor is defective Fan motor is defective Replace MF capacitor Replace PC board Point for placing the tester bar Polarity Polarity Pin 3 of IC04 5V ...

Page 39: ...d heat exchanger sensor TC normal Is 220 230 240V AC supplied between pins 1 and 2 of terminal block Thermo sensor or heat exchanger sensor is defective Replace PC board Replace power relay Microcomputer is defective Power relay RY07 is defective Normal voltage value under power relay ON condition Point for placing the tester bar Polarity Condition Polarity RY07 ON DC 12V Normal voltage value YES ...

Page 40: ...Can any signal tone be heard in a transistor radio when transmitting within 5cm distance from the radio Avoid direct sunlight NO NO PC board is failure Battery life Does the transmission indicator light Is there any reception tone and operation Replace the batteries Remote control is failure Replace remote control Replace PC board NO YES NO YES NO YES YES YES NO YES NO There is no reception tone f...

Page 41: ...lat cable from the terminal plate Turn the power ON If the operation lamp flash 0 5 sec ON 0 5 sec OFF steps 1 3 in the right column are not necessary Push the START STOP button once to set in operation mode Do not set to the fan only or on timer mode Start operation by using the anti restart timer Trouble cause Application of shock voltage Short circuit of the indoor fan motor Defective power cor...

Page 42: ...e Main PC board is defective Check point Symptom 1 The compressor does not operate 2 The operation lamp flashes 1 There is a voltage of 120V or more between the red and black motor connector leads 2 The motor does not rotate But the key operation of the remote control is accepted 3 Motor rotates but vibrates hard Table 9 8 Approximate value of the sensor thermistor resistance TA TC 9 5 2 How to Re...

Page 43: ... 43 9 6 PC Board Layout Top view ...

Page 44: ... 44 Bottom view ...

Page 45: ... 43022321 Bearing 215 43007098 Cap Screw 216 43007843 Bushing 217 43044559 Evaporator 218 43047331 Pipe Delivery 219 43047332 Pipe Suction 220 43069858 Remote Controller 221 43021794 Motor Louver 222 43070090 Hose 3M Drain 223 43070140 Hose Drain 224 43009450 Drain Pan and Grill 225 43080359 Air Filter Left 226 43082271 Plate Inst Assembly 227 43063278 Holder Remote Controller 228 43009498 Grille ...

Page 46: ...412 43060007 Thermal Fuse Set 413 43068355 P C Board Assembly Trans 414 43060025 Lead Assembly Transformer Primary 415 43060026 Lead Assembly Transformer Secondary 416 43033182 Capacitor Electrolytic 417 43054399 Relay Power 418 43055412 Capacitor 1 0MFD 400V 419 43033211 Capacitor Film 420 43033213 Capacitor ECQ UV 0 1MFD 250V 421 43055284 Toshiba Non Linear Resistor 422 43032488 Posistor 820HM 4...

Page 47: ...8 4 Way Valve VH7100D 13 43021928 Fan Motor UE6 21A5P 14 43047549 Flange Nut 15 43046255 Solenoid Coil 16 43019727 Handle 17 43049643 Rubber Cushion 18 43032441 Nipple Drain 19 43019770 Stopper Guard 20 43069988 Holder OL Relay 21 43054400 Relay Overload RAS 07EAH 21 43054401 Relay Overload RAS 09EAH 22 43041142 Compressor PH70T1 4C RAS 07EAH 22 43041564 Compressor PH94T1 4C RAS 09EAH 23 43055470 ...

Page 48: ...TOSHIBA CORPORATION 1 1 SHIBAURA 1 CHOME MINATO KU TOKYO 105 01 JAPAN ...