Toshiba RAS-18N2AX Service Manual Download Page 6

Page: 6 / 84

– 5 –

FILE NO. SVM-06006

Note : 1

• Capacity is based on the following temperature conditions.

Note : 2

• Charge refrigerant according to the table below.

refrigerant

Need to charge

Over 15m up to 20m (20g/m) Over 15m up to 25m (30g/m)

refrigerant

Temperature

Condition

JIS B8615-1

Cooling Heating

Indoor unit inlet air temperature

(DB) 27°C 20°C

(WB) 19°C 15°C

Outdoor unit inlet air temperature

(DB) 35°C 7°C

(WB) 24°C 6°C

RAS-18UFHP-E

/ RAS-18

AH-E

RAS-24UFHP-E

/ RAS-24

AH-E

RAS-18UFP-E

/ RAS-18

A-E

RAS-24UFP-E

/ RAS-24

A-E

RAS-

18UFPX

/ RAS-18

RAS-24UFPX

/ RAS-24

Refrigerant

*1 No need to charge

15m or less

Summary of Contents for RAS-18N2AX

Page 1: ...TIONER UNDER CEILING CONSOLE TYPE RAS 18UFHP E5 RAS 18NAH E RAS 24UFHP E5 RAS 24NAH E RAS 18UFP E5 RAS 18NA E RAS 24UFP E5 RAS 24NA E RAS B18UFPX5 RAS 18N2AX RAS 24UFPX5 RAS 24N2AX FILE NO SVM 06006 18 Class 24 Class May 2006 ...

Page 2: ...E RAS 24UFPX5 RAS 24N2AX 4 SPECIFICATION OF ELECTRICAL PARTS 4 1 Indoor Unit 4 2 Outdoor Unit RAS 18N2AH E 4 3 Outdoor Unit RAS 18N2AX RAS 18NA E 4 4 Outdoor Unit RAS 24N2AH E 4 5 Outdoor Unit RAS 24NA E RAS 24N2AX4 5 REFRIGERATION CYCLE DIAGRAM 5 1 RAS 18UFHP E5 RAS 18NAH E 5 2 RAS 18UFP E5 RAS 18UA E RAS B18UFPX5 RAS 18N2AX 5 3 5 4 RAS 24UFHP E5 RAS 24NAH E RAS 24UFP E5 RAS 24NA E RAS 24UFPX5 RA...

Page 3: ...ng Procedure 9 2 Basic Check Items 9 3 Primary Judgement 9 4 Self Diagnosis by Remote Control Check Code 9 5 How to Diagnose Faulty Parts 9 6 Troubleshooting for Indoor Unit 9 7 Troubleshooting for Wiring Interconnect Cable and Serial Signal Wire 9 8 Troubleshooting for P C Board 9 9 Troubleshooting for Remote Control 10 PARTS REPLACEMENT 10 1 Indoor Unit 10 2 Outdoor Unit RAS 24NAH E RAS 24NA E R...

Page 4: ...on pipe Maximum length m 15 1 One way 20 2 Maximum height m 8 difference INDOOR UNIT RAS 18UFHP E5 RAS 18UFP E5 RAS B18UFPX5 Width mm 1093 Dimensions Height mm 633 Depth mm 208 Net weight kg 23 Evaporator type Finned tube Indoor fan type Multi blade fan High fan m3 h 800 830 800 Air volume Medium fan m3 h 680 700 680 Low fan m3 h 580 650 580 Fan motor output W 50 Air filter Washable filter OUTDOOR...

Page 5: ...ipe Maximum length m 15 1 One way 25 2 Maximum height m 10 difference INDOOR UNIT RAS 24UFHP E5 RAS 24UFP E5 RAS 24UFPX5 Width mm 1093 Dimensions Height mm 633 Depth mm 208 Net weight kg 23 Evaporator type Finned tube Indoor fan type Multi blade fan High fan m3 h 900 930 900 Air volume Medium fan m3 h 750 760 750 Low fan m3 h 650 660 650 Fan motor output W 50 Air filter Washable filter OUTDOOR UNI...

Page 6: ...5m up to 25m 30g m refrigerant Temperature Condition JIS B8615 1 Cooling Heating Indoor unit inlet air temperature DB 27 C 20 C WB 19 C 15 C Outdoor unit inlet air temperature DB 35 C 7 C WB 24 C 6 C RAS 18UFHP E5 RAS 18NAH E RAS 24UFHP E5 RAS 24NAH E RAS 18UFP E5 RAS 18NA E RAS 24UFP E5 RAS 24NA E RAS B18UFPX5 RAS 18N2AX RAS 24UFPX5 RAS 24N2AX Refrigerant 1 No need to charge 15m or less 15m or le...

Page 7: ...t system For stud bolt 8 10 For stud bolt 6 Grille air inlet Back Body Installation plate Mount plate M10 Suspention bolt Wireless remote control Knock out system 200 Min 1093 1015 742 450 20 20 330 165 7 4 70 Min 633 460 57 18 160 633 208 1093 UNDER CEILING CONSOLE INSTALLATION ...

Page 8: ...28 321 86 A 124 109 600 or more Air out let 321 600 Air inlet 4xØ11 Long holes For Ø8 Ø10 anchor bolt Gas side Flare Ø 15 88 Liquid side Flare Ø 6 35 90 600 90 69 342 321 Z 50 36 R15 B Detail Drawing Front leg Ø 436 FAN GUARD 715 290 275 600 or more 84 129 5 4 Electrical part cover 321 307 100 or more 100 or more Installation dimension 2 2 Outdoor Unit 24 Class 7 FILE NO SVM 06006 ...

Page 9: ...d side Flare 6 35 Ø Ø Gas side Flare 12 7 Service port 4x 11 Long holes For 8 10 anchor bolt Installation dimension Air outlel 100 or more 100 or more 600 or more 600 or more Air intlel Ø Ø Ø Ø6 hole 86 Ø6 hole Ø11x14 hole R15 28 A 321 R5 5 36 109 124 50 129 84 5 4 600 321 90 600 90 275 290 550 Ø 436 Z R15 50 36 2 321 342 69 Ø Ø Ø 2 3 Outdoor Unit 18 Class 8 FILE NO SVM 06006 ...

Page 10: ...1 1 1 1 1 2 2 CN100 WHI GRY GRY CN101 1 1 2 2 3 3 1 2 3 3 3 6 6 3 3 2 2 1 1 BLK BLK CN01 HEAT EXCHANGER SENSOR TC 1 1 2 2 COLOR IDENTIFICATION BRW BROWN RED RED WHI WHITE YEL YELLOW BLU BLUE BLK BLACK GRY GRAY PNK PINK ORN ORANGE GRN YEL GREEN YELLOW GRN GREEN PUR PURPLE 3 WIRING DIAGRAM DISCHARGE PIPE SENSOR TD HEAT EXCHANGER SENSOR TE CN08 CN07 BLU BLU BLK BLK 1 1 2 3 3 1 1 2 3 3 i L N 3 1 2 i F...

Page 11: ... 3 2 1 1 2 3 1 2 3 4 5 6 4 5 6 7 8 9 7 8 9 10 10 CN25 INFRARED RAYS RECEIVE AND INDICATION PARTS 1 2 3 1 2 3 4 5 6 4 5 6 7 8 9 7 8 9 10 10 5 3 5 3 1 1 1 1 1 1 2 2 CN100 WHI GRY GRY CN101 1 1 2 2 3 3 1 2 3 3 3 6 6 3 3 2 2 1 1 BLK BLK CN01 HEAT EXCHANGER SENSOR TC 1 1 2 2 COLOR IDENTIFICATION BRW BROWN RED RED WHI WHITE YEL YELLOW BLU BLUE BLK BLACK GRY GRAY PNK PINK ORN ORANGE GRN YEL GREEN YELLOW ...

Page 12: ...HI GRY GRY CN101 1 1 2 2 3 3 1 2 3 3 3 6 6 3 3 2 2 1 1 BLK BLK CN01 HEAT EXCHANGER SENSOR TC 1 1 2 2 COLOR IDENTIFICATION BRW BROWN RED RED WHI WHITE YEL YELLOW BLU BLUE BLK BLACK GRY GRAY PNK PINK ORN ORANGE GRN YEL GREEN YELLOW GRN GREEN PUR PURPLE 3 3 RAS 24UFHP E5 RAS 24NAH E DISCHARGE PIPE SENSOR TD HEAT EXCHANGER SENSOR TE CN08 CN07 BLU BLU BLK BLK 1 1 2 3 3 1 1 2 3 3 i L N 3 1 2 i FERRITE C...

Page 13: ... GRN YEL FOR DRAIN PUMP OPTION BRW GRY BLK RED RED WHI WHI FAN MOTOR PUR BLU GRY YEL CN402 CN401 CN11 WHI RED FUSE 250VAC R21 CR02 RY04 MCC 865A CR401 2 1 1 1 2 3 2 1 1 3 3 3 1 2 3 6 5 4 6 5 4 3 2 1 3 2 1 1 2 3 1 2 3 4 5 6 4 5 6 7 8 9 7 8 9 10 10 CN25 INFRARED RAYS RECEIVE AND INDICATION PARTS 1 2 3 1 2 3 4 5 6 4 5 6 7 8 9 7 8 9 10 10 5 3 5 3 1 1 1 1 1 1 2 2 CN100 WHI GRY GRY CN101 1 1 2 2 3 3 1 2...

Page 14: ...P35EA12 Output Rated 2W 6poles 4phase DC 12V 4 2 Outdoor Unit RAS 18NAH E No Parts name Type Specifications Output Rated 1500 W 2 poles 1 phase 220 240 V 50 Hz 1 Compressor PH340X3C 4KT1 Winding resistance Ω C R C S at 20 C 1 46 2 47 Output Rated 42 W 4 poles 1 phase 220 240 V 50 Hz 2 Fan motor for outdoor FG 240 42A 1 Winding resistance Ω Red Black White Black at 20 C 128 126 3 Running capacitor ...

Page 15: ...4 way valve 6 Thermo sensor TE TD 10 kΩ at 25 C 50 kΩ at 25 C 7 Magnetic contactor A35 220 240 V 50 Hz 8 Transformer TT 05 220 240 V 9 Microcontroller TMP47C840N 10 Varistor R73 R74 R86 15G471K 470 V 11 Fuse F01 MT3 T6 3 A 250 V 4 4 Outdoor Unit RAS 24NAH E No Parts name Type Specifications Output Rated 1500 W 2 poles 1 phase 220 240 V 50 Hz 1 Compressor PH340X3C 4KT1 Winding resistance Ω C R C S ...

Page 16: ...00X3CS 4KT1 Winding resistance Ω C R C S at 20 C Output Rated 42 W 4 poles 1 phase 220 240V 50 Hz Winding resistance Ω Red Black White Black 2 Fan motor for outdoor at 20 C 128 126 FG 240 42A AC 440 V 50µF 1 13 2 10 3 Running capacitor 451305L AC 450 V 3 0µF for fan motor RS44B506U0218S 4 5 Magnetic contactor A35 220 240 V 50 Hz Running capacitor for compressor ...

Page 17: ... high temperature limit control operation is included 50Hz Standard pressure P MPaG Surface temp of heat exchanger interchanging pipe T C Fan speed indoor Ambient temp conditions DB WB C Indoor Outdoor Evaporator Indoor unit Multi blade fan Cooling Heating 4 way valve Heating Cooling Compressor Condenser Propeller fan Outdoor unit Capillary tube 2 0x1400l PH340X3C 4KT1 Accumulator Cooling Heating ...

Page 18: ...0Hz Fan speed indoor Ambient temp conditions DB WB C Indoor Outdoor Standard pressure P MPaG Surface temp of heat exchanger interchanging pipe T C Indoor unit Multi blade fan Compressor Condenser Propeller fan Outdoor unit PH340X3C 4KT1 O D 6 35 mm Packed valve 12 70 Packed valve T P Refrigerant R 22 1 00 kg Evaporator Capillary tube 2 0x600S 0 49m Connecting pipe 6 35 mm Mark means check points o...

Page 19: ...limit control operation is included 50Hz Standard pressure P MPaG Surface temp of heat exchanger interchanging pipe T C Fan speed indoor Ambient temp conditions DB WB C Indoor Outdoor Evaporator Indoor unit Multi blade fan Cooling Heating 4 way valve Heating Cooling Compressor Condenser Propeller fan Outdoor unit Capillary tube 2 0x1400S PH400X3CS 4KT1 Accumulator Cooling Heating Mark means check ...

Page 20: ...G Surface temp of heat exchanger interchanging pipe T C Evaporator Indoor unit Multi blade fan Compressor Condenser Propeller fan Outdoor unit Capillary tube 2 4x700S PH400X3CS 4KT1 O D 6 35 mm Packed valve 15 88 Packed valve 6 35 0 49m Connecting pipe 6 35 mm T P Refrigerant R 22 1 68kg Mark means check points of Gas Leak O D 15 88 mm 0 39m Connecting pipe 15 88 mm 15 88 mm 0 39m Flexible pipe Co...

Page 21: ...rol 3 minute Delay at Restart for Compressor Motor Revolution Control Processing Temperature Processing Timer Drain Pump ON OFF Serial Signal Communication Remote Control Infrared Rays 36 7 kHz 8 MHz M C U Indoor Unit Control Panel OPERATION Display Indoor Fan Motor Louver Motor Float Switch Drain Pump From Outdoor Unit Serial Signal Transmitter Receiver Operation Operation Remote Control Operatio...

Page 22: ...estart for Compressor Motor Revolution Control Processing Temperature Processing Timer Drain Pump ON OFF Compressor ON OFF Remote Control Infrared Rays 36 7 kHz 8 MHz M C U Indoor Unit Control Panel OPERATION Display Indoor Fan Motor Louver Motor Float Switch Drain Pump Power Supply Circuit Noise Filter Driver Operation Operation Remote Control Operation Mode Selection AUTO COOL DRY FAN ONLY Tempe...

Page 23: ...tdoor fan motor and the compressor 1 Role of indoor unit controller The indoor unit controller receives the operation commands from the remote control and executes them Temperature measurement at the air inlet of the indoor heat exchanger by the indoor temperature sensor Temperature setting of the indoor heat exchanger by the heat exchanger sensor Louver motor control Indoor fan motor operation co...

Page 24: ... marked with 1 are calculated and controlled by the difference in motor speed between M and L 7 2 2 Cooling operation MODE button on the remote control is set to the cooling operation 1 The compressor 4 way valve outdoor fan and operation display lamp are controlled as shown in Fig 7 2 2 Fig 7 2 2 2 When FAN button is set to AUTO the indoor fan motor operates as shown in Fig 7 2 3 When FAN button ...

Page 25: ...wn in Fig 7 2 4 Fig 7 2 4 2 The microprocessor turns the compressor on and off at the regular intervals 4 to 6 minutes While the compressor is turning off the indoor fan motor operates in the SUPER LOW position The pattern of operation depending on the relation between room temperature and preset temperatures is shown in Fig 7 2 5 Fig 7 2 5 3 FAN button on the remote control is set to AUTO only 4 ...

Page 26: ...of 3 operations Cooling Fan only or Heating is selected according to difference between the preset temperature and the room temperature at which the automatic operation has started as shown in Fig 7 2 9 The Fan only operation continues until the room temperature reaches a level at which another mode is selected 2 Temporary Auto When the TEMPORARY button on the indoor unit is pushed the preset temp...

Page 27: ...ure 7 3 Hi PO 2 Cooling operation The setting temperature drops 3 C The value of the setting temperature on the remote control does not change If the room temperature is higher than the setting temperature by 3 5 C or more the horizontal louver moves to the Hi POWER position automatically Then when the room temperature is 1 C less than the setting temperature the horizontal louver returns automati...

Page 28: ...5 min ofter operation C Zone If 2ºC Teo 10 C defrost will start when 7 6 2 Defrost finish condition 1 If Te 3 C at least 60 sec 4 way value on 2 If Te 8 C 4 way value on Timing Fig 7 6 2 Operation time 4 Loops Tt Td1 Td2 FILE NO SVM 06006 27 Teo Te 3 C at least 20 sec or 60 min after operation Td3 Td4 Finish time record Start time record Defrost time rate Td Tt x 100 Heating time rate Tt Td x Tt ...

Page 29: ...ceed as follows The power supply to the unit must be on the function will not set if the power is off Push the TEMPORARY button located in the center of the front panel continuously for three seconds The unit receives the signal and beeps three times The unit then restarts operating automatically in the event of power supply being accidentally shut down While the filter check lamp is on the TEMPOR...

Page 30: ...eck lamp Press FILTER button on the remote control Or push TEMPORARY button on the indoor unit Note If TEMPORARY button is pushed while the filter check lamp is not indicating the indoor unit will start the Automatic Operation Operation Motions Push TEMPORARY button for more The unit is on standby than three seconds The unit starts to operate The orange lamp is on After approx three seconds The un...

Page 31: ...r When AUTO RESET is ON or green color When AUTO RESTART is OFF Hold down the TEMPORARY button for more than 20 seconds The air conditioner will stop suddenly when the TEMPORARY button is pressed but keep holding it continue Then will beep 3 times is the first 3 seconds but it is not related to Self Cleaning function After holding about 20 seconds the air conditioner will beep 5 times and OPERATIO...

Page 32: ...apacity 7 11 1 Cooling mode The fan speed of indoor unit operates automatically it relates with the compressor s operation Compressor s Operation Fan Speed ON L OFF SL The preset temperature will increase 1 C after the Comfort sleep mode has operated for 1 hour and automatically the temperature will increase another 1 C after the comfort sleep mode has operated for 2 hour The value of the preset t...

Page 33: ...install in a place which cannot bear the weight of the unit Personal injury and property damage can result if the unit falls Before doing the electrical work attach an approved plug to the power supply cord Also make sure the equipment is properly earthed Appliance shall be installed in accordance with national wiring regulations If you detect any damage do not install the unit Contact your TOSHIB...

Page 34: ...essor technical process following installation conditions do apply 1 The power connection for the air conditioner has to be done at the main power distribution This distribution has to be of an impedance Normally the required impedance is reached at a 32A fusing point Air conditioner fuse has to be 16A max 2 No other equipment should be connected to this power line 3 For detailed installation acce...

Page 35: ... Bio enzyme Gingko filter 6 Sasa Zeolite Vitamin C filter Air filter 5 Filter frame 2 Wireless remote control 4 Remote control holder 9 Pan head wood screw 200 mm or more 8 Mounting screw Hook 70 mm or more 200 mm or more 1 Installation plate FILE NO SVM 06006 34 6 mm thick heat resisting polyethylene foam 100 mm or more 600 mm or more 100 mm or more 600 mm or more 600 mm or more 100 mm or more 60...

Page 36: ...If it is necessary to drain the defrost water attach Drain nipple and Cap water proof to the bottom plate of the outdoor unit before installing it Part Code A B C Q ty One each 1 One each Parts name Refrigerant piping Liquid side 6 35 mm Gas side 12 70 mm 18 Class 15 88 mm 24 Class Pipe insulating material polyethylene foam 6 mm thick Putty PVC tapes 108 mm 600 mm 29 mm 25 mm 90 mm 125 mm 325 mm 8...

Page 37: ...rame x 2 Sasa Zeolite Vitamin C filter x 1 Bio enzyme Gingko filter x 1 Mounting screw 4 x 25 s x 8 Part No 5 6 7 8 Part name Q ty Pan head wood screw 3 1 x 16 s x 2 Drain nipple x 1 For Heat pump model only Flexible pipe x 1 Pipe shield x 1 Part No 9 13 Others Owner s manual Installation manual The part marked with asterisk is packaged with the outdoor unit Cap water proof x 2 For Heat pump model...

Page 38: ...ch as a curtain that may block the signal from the indoor unit Do not install the remote control in a place exposed to direct sunlight or close to a heating source such 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 show...

Page 39: ...ove the Panel arms from the Front panel Fig 8 4 4 1 1 2 2 5 3 3 8 4 3 After installation Install the Air inlet grille 1 Insert the three Panel arms on the Air inlet grille and fix each securely by screws Fig 8 4 5 CAUTION The screws that fixed with Panel arms must not be loose 2 Set the Air inlet grille arm to the axis of the Front panel 3 Insert the Grille stopper to the correct position and fix ...

Page 40: ...ion bolts into the metal fittings of the indoor unit 3 Set to nuts spring washers and washers on both sides of the metal fittings and then move the indoor unit backward 4 Secure it with the M10 Nuts 4pcs 5 Attach the Side covers to the unit Fig 8 4 9 Condition for installation The unit must not decline more than 15 mm in either axis Fig 8 4 10 240 mm or more 235 mm or more 15 mm 15 mm 140 330 1015...

Page 41: ...hose installation The piping direction can be 4 ways as illustrated The Drain hose is only one way Fig 8 4 11 How to install the Drain hose 1 Remove the two screws and the Drain band 2 Cut a slit for the drain hose hole Fig 8 4 12 3 Place the Drain hose on the U shape space and secure it with the Drain band and two screws Fig 8 4 13 Rear piping hole 80 Ceiling Wall Ceiling 175 mm or more 140 mm Sc...

Page 42: ... Insert clip anchors for appropriate Mounting screws 8 NOTE Secure four corners and lower parts of the Installation plate 1 with 6 to 8 mounting screws to install it 390 mm or more 375 mm or more Rear piping hole 80 Floor REMOCON INSTALL A C B F 140 633 320 160 742 1093 60 Projection 15 mm or less 8 8 8 8 8 Mounting screw 4 x 25 s s s s s Clip anchor local parts 5 mm dia hole Anchor bolt Install t...

Page 43: ...5 1 Remove the Terminal cover and the Cord clamp 2 Insert the connecting cable into the pipe hole on the wall 3 Insert the connecting cable fully into the Terminal block and secure it tightly with the screw Tightening torque 1 2 N m 0 12kgf m 4 Fix the connecting cable by the Cord clamp with two screws 5 Fix the Terminal cover Stripping length of the connecting cable Fig 8 4 26 NOTE Use strand wir...

Page 44: ...0 3 When connecting the Extension drain hose insulate the connecting part of Extension drain hose with the Pipe shield Fig 8 4 31 CAUTION Arrange the drain pipe for proper drainage from the unit Improper drainage can result in dew dropping Provided by customer Extension drain hose Inside the room Drain hose Pipe Shield 8 4 7 Pipe shield for flare nut connection Joints in liquid and gas pipes of th...

Page 45: ...ll the outdoor unit without anything blocking the air discharging 2 When the outdoor unit is installed in a place always exposed to strong wind like a coast or on a high storey of a building secure the normal fan operation using a duct or a wind shield 3 Especially in windy area install the unit to prevent the admission of wind 4 Installation in the following places may result in trouble Do not in...

Page 46: ...ngth is 20 meters 15 minutes for 20 meters Assuming a pump capacity of 27 liters per minute Then confirm that the compound pressure gauge reading is 101 kPa 76 cmHg 5 Close the low pressure side valve handle of gauge manifold 6 Open fully the valve stem of the packed valves both sides of Gas and Liquid 7 Remove the charging hose from the service port 8 Securely tighten the caps on the packed valve...

Page 47: ...charge refrigerant 15 m or less Over 15 m up to 20 m 20g m 15 m or less Over 15 m up to 25 m 30g m A Hexagonal wrench is required 8 5 4 Wiring connection 1 Remove the electric parts cover from the outdoor unit 2 Connect the connecting cable to the terminal as identified with their respective matched numbers on the terminal block of indoor and outdoor unit 3 When connecting the connecting cable to ...

Page 48: ...wo rooms they may be controlled simultaneously with a single remote control To prevent this set either unit and its remote control to B setting Both units are set to A setting before shipment The remote control signal is not recived when the indoor unit setting is different from the remote control one 1 Set the remote control selector switch with the indoor unit 1 Turn the circuit breaker of the m...

Page 49: ...ile pressing the CHECK button B is indicted at the right of the present temperature display To reset the switch to the A setting press the MODE button again while pressing the CHECK button Fig 8 6 3 3 Confirm that the indoor unit can operate with the new setting 8 7 How to Use Drain Pump Kit of Option In the case of upward drainage from the unit Under ceiling installation It is necessary to use Dr...

Page 50: ... same operating mode as before the power failure Information The product was shipped with Auto Restart function in the off position Turn it on as required How to set the auto restart Press and hold the TEMPORARY button for about 3 seconds After 3 seconds the electronic beeper makes three short beeps to tell you the Auto Restart has been selected To cancel the Auto Restart follow the steps describe...

Page 51: ... operation starts 6 The outdoor fan motor stops in the Heating operation 7 The compressor is not turned on even though the room temperature is in the range that the compressor is turned on 8 The operation mode changes in the Auto matic operation 9 The Fan only operation continues in the Automatic operation 10 The Hi POWER operation does not work No Operation of Air Conditioner Descriptions The OPE...

Page 52: ...mpressor is defective Symptom Check Primary judgement 9 3 Primary Judgement 9 3 1 Role of indoor unit controller The indoor unit controller receives the operation commands from the remote control and executes them Temperature measurement at the air outlet of the indoor heat exchanger by the indoor temperature sensor Temperature setting of the indoor heat exchanger by the heat exchanger sensor Louv...

Page 53: ...s continuously 5 times per 1 sec 2 Press TIMER 8 button If there is no fault with a code the indoor unit will beep once Pi and the display of the remote control will change as follows Check the unit with all 35 check codes 00 to 22 as shown in Table 9 4 1 Press TIMER 9 button to change the check code backwards If there is a fault the indoor unit will beep for 10 seconds Pi Pi Pi Note the check cod...

Page 54: ... errors The lamp on the indoor unit blinks when error is defected The lamp on the indoor unit blinks when error is defected The lamp on the indoor unit blinks when error is defected And it returns to the normal condition when recovering from errors The lamp on the indoor unit blinks when error is defected The lamp on the indoor unit blinks when error is detected 1 Check the indoor thermo sensor TA...

Page 55: ...ES NO YES NO YES NO Does four way valve operate properly Is TC sensor resistance value 10kΩ at 25 C normal Does coil terminal have 220 240 V in heating operation Are circuit wires normal Is outdoor P C board normal Four way valve is defective Outdoor P C board is defective Replace Four way valve Circuit check modification Replace TC sensor YES NO YES NO YES YES NO NO YES NO Indoor P C board is def...

Page 56: ...erload Check compressor Outdoor P C board is defective Replace compressor Wiring check modification Replace P C board YES NO YES NO YES NO YES NO YES NO YES NO YES NO NO YES Connect connector properly Replace condenser Replace fan motor Is connector connected properly Is condenser normal Is indoor fan motor normal Does indoor fan operate Are filters clogged Is TC sensor resistance value 10kΩ at 25...

Page 57: ... TA sensor Replace P C board Connect CN03 properly Is TE sensor connector connected properly Is TE sensor resistance value 10 kΩ at 25 C normal Is CN01 TC sensor connector connected properly YES NO YES NO Is TC sensor resistance value 10 kΩ at 25 C normal Indoor P C board is defective Replace TC sensor Replace P C board Connect CN01 properly YES NO YES NO Indoor P C board is defective Replace TE s...

Page 58: ...ler such as discharge thermostat normal Is charged amount of refrigerant normal Is overload relay normal Is TD sensor resistance value 50 kΩ at 25 C normal Are wires connected to connector properly Outdoor P C board is defective Connect wires to connector properly Check and modify charged amount of refrigerant Unit operates normally Replace TD sensor Replace P C board YES NO Replace TD sensor Repl...

Page 59: ...as remote controller Select switch to remocon A B for correct same as remote controller Remote control is defective Refer to 9 9 Troubleshooting for Remote Control Unit operates normally Is fuse F01 of indoor control board blown Parts R21 R22 SG01 C15 C01 DB01 C02 and T01 are defective Does the fan motor connector between 1and 3 short circuit Is voltage DC 12V or 5V indicated on rear of indoor con...

Page 60: ...ted connecting Does the cross flow fan rotate normally Is the rotation signal DC 5V 0V output between 3 Brown lead wire and 2 Gray lead wire of the motor connector CN11 when rotating the cross flow fan by hand in no operating status 3 pulses one turn Turn on the power supply Repair the bearing of the fan NO YES YES NO NO YES YES YES NO Turn the power supply Shut off the power supply once NO NO Doe...

Page 61: ...on Is it possible to detect AC 220 240V between 2 and 3 on terminal block Are all of compressor cords normal Is compressor motor winding normal Check winding resistor Is capacitor for compressor normal Is overload relay normal Does compressor start Does compressor stop after a while Is gas quantity normal Check gas pressure Compressor is defective NO YES YES YES Replace P C board Gas shortage Gas ...

Page 62: ...ng normal Check winding resistor NO Compressor is defective YES Replace compressor Is capacitor for compressor normal NO Capacitor is defective Is it possible to detect AC 200V between 2 and 3 on terminal block Is crossover cable normal YES Is overload relay normal Does compressor start Does compressor stop after a while Is gas quantity normal Check gas pressure Compressor is defective Replace P C...

Page 63: ... 62 Inspection procedure Heating model Replace transformer FILE NO SVM 06006 AC 70 100V outdoor P C board ...

Page 64: ... compressor motor winding normal Check winding resistor Is gas quantity normal Check gas pressure Is capacitor for compressor normal Is overload relay normal Does compressor start Does compressor stop after a while Replace compressor Compressor is defective Compressor is defective NO Capacitor is defective NO Overload relay is defective NO Compressor is defective NO Gas shortage Gas leak FILE NO S...

Page 65: ...o restart the unit 2 1 3 Terminal block on indoor side Terminal block Tester Red White 2 The outdoor unit stops once it would not operate until the power is turned on again 3 The outdoor unit stops between 10 minutes to 1 hour after starting and a check code is indicated on the remote control Check code 03 1E Refer to Table 9 4 1 Measure gas pressure Gas shortage Pipe clogging Compressor is turned...

Page 66: ...ndoor fan motor drive circuit and control circuit C P U and peripheral circuits buzzer drive circuit and buzzer b Infrared rays parts Infrared rays receiving circuit Check the defects of the P C board with Table 9 8 1 Check whenther or not the fuse F01 is blown Check power supply voltage 1 Between TP3 and TP4 of CN30 and CN31 220 240V AC 2 Between and of C02 DC310 340V 3 Between 12V and GND 4 Betw...

Page 67: ...sor operates 2 Check whether or not the OPERATION lamp blinks 1 Check it is impossible to detect the voltage between 2 and 3 of the CN11 2 The motor does not operate But it is possible to receive the signal from the remote control 2 The motor rotates but vibrates strongly 1 The temperature of the indoor heat exchanger is extremely high 2 The connector of the heat ex changer sensor short circuited ...

Page 68: ...FILE NO SVM 06006 67 9 8 4 P C board layout Top View Bottom View ...

Page 69: ...s 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 co...

Page 70: ...opper from the axis of the Front panel After that remove the Air inlet grille 6 Remove the Panel arms from the Front panel How to install the Air inlet grille 1 Insert three Panel arms on the Air inlet grille and fix each securely by screws 2 Set the Air inlet grille arm to the axis of the Front panel Refer to 8 4 3 3 Insert the Grille stopper to the correct position and fix it securely with screw...

Page 71: ...through the Front panel Remove the Drain band from the Front panel Cut away the Opening base for piping from Front panel and keep parts 3 Open 3 Cap screws and remove the screws 4 Remove 5 screws fixing the Front panel 5 Remove the hooks of the Panel LED nearly side from the Drain pan Front panel Continue Drain band Drain panel Cap screws Front Panel Screws ...

Page 72: ...t 3 Fix 5 hooks around the Front panel with conformation the Guide rib is inserting into the Back body 4 Fix 8 screws and close 3 Cap screws 5 Install the Drain band into the Front panel 6 Check the gap between the Front panel and the Back body 3 How to remove the Drain pan 1 Remove the Air inlet grille and the Front panel 1 2 2 Remove the Louver motor from the Drain pan 3 Remove the shaft of Hori...

Page 73: ...nect the connecting cable 4 Remove the Connector cover and disconnect the Fan motor cords 5 Remove the TC sensor and earth wire from Refrigeration assembly 6 Remove the Electrical parts assembly NOTE When install the electrical parts assembly fix the screw after the Back body is fixed Drain pan assembly Electrical parts assembly Screw Drain Pan Screw Continue Connecting cable Cord clamp TC sensor ...

Page 74: ...move 2 screws and remove the refrigeration assembly with pushing it to right hand 6 How to remove the Multiblade fan and Fan motor 1 Remove the Air inlet grille and the Front panel 1 2 2 Disconnect 2 connectors 3 Remove the Fan covers 4 Remove the Motor band with holding the Fan motor and then remove the Fan motor with the Multi blade fans 5 Unfasten the Set screw and remove the Multi blade fans R...

Page 75: ...n the terminal block and 1 ground screw on the electrical parts base 1 Common procedure No Part name Procedures Remarks Front cabinet Side cabinet 2 Remove the packed valve cover and the electrical parts cover 2 screws 4 x 10L 4 Remove the top cabinet 7 screws 4 x 10L Pulling out upward 5 Remove the top cabinet 2 screws 4 x 10L Pull the front right portion toward you and remove it pulling out upwa...

Page 76: ...ires from the terminal 2 Running capacitor for compressor 3 Running capacitor for fan motor 4 Magnetic contactor 5 Spark killer Cooling only model Spark killer Running capacitor for compressor Running capacitor for fan motor Magnetic contactor Cooling only model Procedures Remarks Part name No Heat pump model 1 Perform the common procedure 1 2 Remove the fixing screw 2 screws 4 x 10L 3 Disconnect ...

Page 77: ...erminal 1 Perform the common procedure 1 2 Remove the fixing screw 2 screws 4 x 10L 3 Disconnect the lead wires from the terminal 1 Perform the common procedure 1 2 Remove the fixing screw 1 screw 4 x 10L 3 Disconnect the lead wires from the terminal 1 Common procedure 2 Running capacitor for compressor 3 Running capacitor for fan motor 4 Magnetic contactor 7 Spark killer No Part name Procedures R...

Page 78: ...04 43T62003 Cord clamp Location Part Description No No 405 43T69315 Display unit 406 43T50302 Temperature sensor 407 43T69311 PC Board 407 43T69312 PC Board 407 43T69313 PC Board 407 43T69314 PC Board 408 43T08349 Switch cover Note Location No 401 and N0 407 43T69311 used for these models RAS 24UFHP E5 43T69312 used for these models RAS 24UFP E5 RAS 24UFPX5 43T69313 used for these models RAS 18UFH...

Page 79: ... D 206 43T80302 AIR FILTER 227 43T82308 PLATE INSTALLATION 207 43T00433 CAP SCREW C 228 43T60314 TERMINAL COVER 208 43T00434 CAP SCREW LR 229 43T62303 CONNECTOR COVER 209 43T20303 FAN COVER 230 43T83003 HOLDER REMOTE CONTROLLER 210 43T20304 MOTOR BAND ASSY 231 43T69421 WIRELESS REMOCO 211 43T20317 FAN ASSY MULTIBLADE FAN FOR Heat pump model 212 43T19309 SCREW SET D T 231 43T69422 WIRELESS REMOCO 2...

Page 80: ...440V 9 43T46308 VALVE PACKED 6 35 DIA 31 43T55341 CAPACITOR PLASTIC FILM 10 43T46019 VALVE PACKED 12 7 DIA 32 43T60352 TERMINAL BLOCK 6P 11 43T47331 BONNET 6 35 DIA 34 43T61305 MAGNETIC RELAY BASE 12 43T47333 BONNET 12 70 DIA 35 43T19331 FIN GUARD 13 43T47013 CAPILLARY TUBE 2 0 DIA 39 43T46337 4 WAY VALVE 14 43T00449 FRONT CABINET 40 43T46339 COIL V 4WAY 15 43T00458 LEFT CABINET AC220 240V 50Hz NE...

Page 81: ...52 UPPER CABINET 8 43T00448 FIXING PLATE VALVE 26 43T96304 BUSHING 9 43T46308 VALVE PACKED 6 35 DIA 27 43T62325 ELECTRIC PART COVER NEW 10 43T46019 VALVE PACKED 12 7 DIA 28 43T61304 ELECTRIC PART BASE 11 43T47331 BONNET 6 35 DIA 29 43T52302 MAGNETIC CONTACTOR 12 43T47333 BONNET 12 70 DIA AC220 240V 50Hz 13 43T47013 CAPILLARY TUBE 2 0 DIA 30 43T55340 MF CAPACITOR 50uF 440V 14 43T00449 FRONT CABINET...

Page 82: ...A 31 43T55342 CAPACITOR PLASTIC FILM 10 43T46338 VALVE PACKED 15 88 DIA 32 43T60352 TERMINAL BLOCK 6P 11 43T47331 BONNET 6 35 DIA 35 43T19331 FIN GUARD 12 43T47334 BONNET 15 88 DIA 36 43T00456 UPPER FRONT CABINET A 13 43T47013 CAPILLARY TUBE 2 0 DIA 37 43T00457 UPPER FRONT CABINET B 14 43T00449 FRONT CABINET 38 43T71301 HANDLE 15 43T00453 LEFT CABINET 39 43T46337 4 WAY VALVE 16 43T00454 RIGHT CABI...

Page 83: ...E 26 43T96304 BUSHING 9 43T46308 VALVE PACKED 6 35 DIA 27 43T62325 ELECTRIC PART COVER NEW 10 43T46338 VALVE PACKED 15 88 DIA 28 43T61306 ELECTRIC PARTS BASE 11 43T47331 BONNET 6 35 DIA 29 43T52305 MAGNETIC CONTACTOR 12 43T47334 BONNET 15 88 DIA 30 43T55340 MF CAPACITOR 50uF 440V 13 43T47013 CAPILLARY TUBE 2 0 DIA 31 43T55341 CAPACITOR PLASTIC FILM 14 43T00449 FRONT CABINET 32 43T60352 TERMINAL BL...

Page 84: ... 87 FILE NO SVM 03010 1 TOSHIBA CARRIER THAILAND CO LTD 144 9 MOO 5 BANGKADI INDUSTRIAL PARK TIVANON ROAD TAMBOL BANGKADI AMPHUR MUANG PATHUMTHANI 12000 THAILAND ...

Search results

Summary of Contents for RAS-18N2AX

Reviews:

Toshiba RAS-18N2AX, Service Manual, Page: 6 / 84

Search results

Summary of Contents for RAS-18N2AX

Reviews: