Toshiba RAS-18UA-AR Service Manual Download Page 8

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FILE NO. SVM-02008

2-2. Outdoor Unit (RAS-18UAH-E, RAS-18UA-E, RAS-18UAX, RAS-18UA-AR)

Detail Drawing

600

325

R10

∅

11x14 hole

∅

6 hole

120

∅

6 holes

(For fixing outdoor unit)

∅

11x14 holes

(For

∅

8 -

∅

10 anchor bolt)

∅

25 Drain oulet

Fan guard

Handle

538

300

600
830

160

Installation dimension

100 or more

600 or more

600

or more

100 or more

325

Air inlet

Air

inlet

∅

11x14

for

∅

anchor bolt

Service Port

Electric
Parts cover

Liquid side
(Flare

∅

6.35)

Gas side
(Flare

∅

12.70)

344

∅

420

Summary of Contents for RAS-18UA-AR

Page 1: ... RAS 18UAH E RAS 18UFP E RAS 18UA E RAS 18UFPX RAS 18UAX RAS 18UFP AR RAS 18UA AR RAS 18UFPX T2 RAS 18UAX T2 RAS 24UFHP E RAS 24UAH E RAS 24UFP E RAS 24UA E RAS 24UFPX RAS 24UAX RAS 24UFP AR RAS 24UA AR RAS 24UFPX T RAS 24UAX T FILE NO SVM 02008 24 Class Mar 2002 18 Class ...

Page 2: ... 4 SPECIFICATION OF ELECTRICAL PARTS 4 1 Indoor Unit 4 2 Outdoor Unit RAS 18UAH E 4 3 Outdoor Unit RAS 18UA E RAS 18UAX 4 4 Outdoor Unit RAS 18UA AR 4 5 Outdoor Unit RAS 18UAX T2 4 6 Outdoor Unit RAS 24UAH E 4 7 Outdoor Unit RAS 24UA E RAS 24UAX RAS 24UA AR 4 8 Outdoor Unit RAS 24UAX T 5 REFRIGERATION CYCLE DIAGRAM 5 1 RAS 18UFHP E RAS 18UAH E 5 2 RAS 18UFP E RAS 18UA E RAS 18UFPX RAS 18UAX 5 3 RA...

Page 3: ...gnosis 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 18UAH E RAS 18UA E RAS 18UAX RAS 18UA AR 10 3 Outdoor Unit RAS 24UAH E RAS 18UAX T2 RAS 2...

Page 4: ...e connection Liquid side size mm 6 35 Interconnection Connection type Flare connection pipe Maximum length m 15 1 One way 20 2 Maximum height m 8 difference INDOOR UNIT RAS 18UFHP E RAS 18UFP E RAS 18UFP AR RAS 18UFPX T2 RAS 18UFPX 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 800 830 800 900 Air volum...

Page 5: ... 6 35 Interconnection Connection type Flare connection pipe Maximum length m 15 1 One way 25 2 Maximum height m 10 difference RAS 24UFP E INDOOR UNIT RAS 24UFHP E RAS 24UFPX RAS 24UFPX T RAS 24UFP AR 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 fa...

Page 6: ...RAS 18UFPX RAS 18UAX RAS 24UFPX RAS 24UAX RAS 18UFP AR RAS 18UA AR RAS 24UFP AR RAS 24UA AR RAS 18UFPX T2 RAS 18UAX T2 RAS 24UFPX T RAS 24UAX T 1 No need to charge 15m or less 15m or less refrigerant 2 Need to charge Over 15m up to 20m 20g m Over 15m up to 25m 20g m refrigerant Temperature Condition JIS C9612 1994 Cooling Heating Indoor unit inlet air temperature DB 27 C 20 C WB 19 C 12 C Outdoor ...

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: ... 6 holes For fixing outdoor unit 6 11x14 holes For 8 10 anchor bolt 25 Drain oulet Fan guard Handle 538 300 90 600 830 160 91 54 90 50 Installation dimension 100 or more 600 or more 600 or more 100 or more 325 Air inlet Air inlet 4x 11x14 for 8 10 anchor bolt Service Port Electric Parts cover Liquid side Flare 6 35 Gas side Flare 12 70 344 420 ...

Page 9: ...4 140 88 310 23 340 pitch 12 12 364 A Detail Drawing 25 Drain outlet 12x18 hole 52 68 4 12x18 holes for 8 10 anchor bolt Handle Handle Mounting dimension of anchor bolt 600 100 or more 600 or more 600 or more 100 or more Air outlet 4 12x18 for 8 10 anchor bolt Service Port Electric Parts cover Liquid side Flare 6 35 Gas side Flare 15 88 A 600 ...

Page 10: ... 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 1 1 2 3 3 1 2 3 L N 1 2 3 BLK BLK CN01 HEAT EXCHANGER SENSOR TC 1 1 2 2 TRANSFORMER DISCHARGE PIPE SENSOR TD HEAT EXCHANGER SENSOR TE MAIN P C BOARD MCC 1275 COMPRESSOR FAN MOTOR INDOOR TERMINAL BLOCK INDOOR UNIT OUTDOOR TERMINAL BLOCK OUTDOOR UNIT POWER TERMINAL BLOCK POWER SUPPLY 220 240V 50 Hz CN06 ...

Page 11: ... 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 GRN GREEN PUR PURPLE J401 ORN RED PNK YEL BRW BLU BLU...

Page 12: ...YS 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 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 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 J401 ORN RED PNK YEL BRW BLU BLU BLU BLU BLU...

Page 13: ... 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 1 1 2 3 3 1 2 3 L N 1 2 3 BLK BLK CN01 HEAT EXCHANGER SENSOR TC 1 1 2 2 TRANSFORMER DISCHARGE PIPE SENSOR TD HEAT EXCHANGER SENSOR TE MAIN P C BOARD MCC 1275 COMPRESSOR FAN MOTOR INDOOR TERMINAL BLOCK INDOOR UNIT OUTDOOR TERMINAL BLOCK OUTDOOR UNIT POWER TERMINAL BLOCK POWER SUPPLY 220 240V 50 Hz CN06 CN08 CN07 CN...

Page 14: ...FRARED 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 CAPACITOR CAPACITOR 3 1 2 3 1 2 L N POWER SUPPLY 220 240V 50Hz 220V 50Hz For RAS 18UAX T2 RAS 24UAX T SPARK KILLER MAGNETIC RELAY FAN MOTOR INDOOR UNIT POWER TERMINAL BLOCK OUTDOOR UNIT...

Page 15: ...uver motor MP35EA12 Output Rated 2W 10poles 1phase DC 12V 4 2 Outdoor Unit RAS 18UAH E No Parts name Type Specifications Output Rated 1500W 2poles 1phase 220 240V 50Hz 1 Compressor PH250X3 4LM Winding resistance Ω Red Black White Black at 20 C 2 29 1 22 Output Rated 65W 6poles 1phase 220 240V 50Hz 2 Fan motor for outdoor MMF 230 65F Winding resistance Ω Red Black White Black at 20 C 71 2 139 3 Run...

Page 16: ... White Black at 20 C 1 22 2 29 Output Rated 65W 6poles 1phase 220 240V 50Hz 2 Fan motor for outdoor MMF 230 65A Winding resistance Ω Red Black White Black at 20 C 71 2 139 0 3 Running capacitor SK45FMP02U2 AC 450V 2µF for fan motor 4 Running capacitor SK42CMP45U1 AC 420V 45µF for compressor 5 Magnetic relay CLK 26J 220 240V 50Hz 4 4 Outdoor Unit RAS 18UA AR No Parts name Type Specifications Output...

Page 17: ...valve 6 Thermo sensor TE TD 10kΩ at 25 C 50kΩ at 25 C 7 Magnetic relay CLK 35J 220 240V 50Hz 8 Transformer TT 05 220 240V 9 Microcomputer TMP47C840N 10 Varistor R73 74 86 15G471K 470V 11 Fuse F01 MT3 T5A 250V No Parts name Type Specifications Output Rated 2200W 2poles 1phase 220 240V 50Hz 1 Compressor PH280X3 4MS Winding resistance Ω Red Black White Black at 20 C 2 72 0 82 Output Rated 51W 6poles ...

Page 18: ...ding resistance Ω Red Black Red Black at 20 C 2 72 0 82 Output Rated 65W 6poles 1phase 220 240V 50Hz 2 Fan motor for outdoor KRG6 71SB5P T Winding resistance Ω Red Black White Black at 20 C 143 0 275 0 3 Running capacitor SK45FMP3 5U2 AC 450V 3 5µF for fan motor 4 Running capacitor SK42CMP45U1 AC 420V 45µF for compressor 5 Magnetic relay CLK 35J 220 240V 50Hz ...

Page 19: ...e 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 Muffler 4 way valve Heating Cooling Compressor Condenser Propeller fan Outdoor unit Capillary tube 1 2x1500S Capillary tube 2 0x1200S PH250X3 4LM Accumulator C...

Page 20: ...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 PH250X3 4LM O D 6 35 mm Packed valve 12 70 Packed valve T P Refrigerant R 22 1 06 kg Evaporator Capillary tube 2 4x1000S Muffler 0 49m Connecting pipe 6 35 mm Mark means check point...

Page 21: ...ent 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 PH250X3 4LM O D 6 35 mm Packed valve 12 70 Packed valve T P Refrigerant R 22 1 17 kg Evaporator Capillary tube 2 0x1000S Capillary tube 0 8x900S Muffler 0 49m Connecting pipe 6 35 mm Mark means check po...

Page 22: ...d 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 PH210T2 4L7 O D 6 35 mm Packed valve 15 88 Packed valve T Refrigerant R 22 1 47 kg Evaporator Capillary tube 2 0x800S 0 49m Connecting pipe 6 35 mm 6 35 Mark means check points of Gas Leak ...

Page 23: ...ol 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 Muffler 4 way valve Heating Cooling Compressor Condenser Propeller fan Outdoor unit Capillary tube 2 4x1400S Liquid tank 25x140S PH310X3 4MM Accumulator Cooling Heating Mar...

Page 24: ...Hz Fan speed indoor Ambient temp conditions DB WB C Indoor Outdoor Standard pressure P MPaG Surface temp of heat exchanger interchanging pipe T C Evaporator Indoor unit Multi blade fan Cooling Compressor Condenser Propeller fan Outdoor unit Capillary tube 2 4x1400S Liquid tank 25x140S PH280X3 4MS Accumulator Cooling O D 6 35 mm Packed valve 15 88 Packed valve 6 35 0 49m Connecting pipe 6 35 mm T P...

Page 25: ...tiallizing Circuit Clock Frequence Oscillator Circuit Power Supply Circuit Noise Filter Relay RY401 Louver ON OFF Signal Serial Signal Communication Hi POWER Display FILTER Sign Display PRE DEF Sign Display TIMER Display Louver Driver Functions Louver Control 3 minute Delay at Restart for Compressor Motor Revolution Control Processing Temperature Processing Timer Drain Pump ON OFF Serial Signal Co...

Page 26: ...ure Sensor Infrared Rays Signal Receiver Initiallizing Circuit Clock Frequency Oscillator Circuit From Outdoor Unit Relay RY401 Relay RY04 Louver ON OFF Signal Compressor Hi POWER Display FILTER Sign Display FAN ONLY Sign Display TIMER Display Louver Driver Functions Louver Control 3 minute Delay at Restart for Compressor Motor Revolution Control Processing Temperature Processing Timer Drain Pump ...

Page 27: ...operation commands from the indoor unit and operates the outdoor 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 air inlet of the indoor unit by the indoor temperature sensor Temperature setting of the indoor heat exchanger by the heat exchanger sensor Louve...

Page 28: ...OTE 1 The values marked with 1 are calculated and controlled by the difference in motor speed between M and L Fig 7 2 1 Setting of air flow FAN AUTO 2 ECO and Hi Power operation cannot be set 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 on the remote control are controlled as shown in Fig 7 ...

Page 29: ...rolled as shown in Fig 7 2 4 Fig 7 2 4 2 The microcontroller 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 t...

Page 30: ...nother mode is selected 2 Temporary Auto When the TEMPORARY button on the indoor unit is pushed the preset temperature is fixed at 24 C and the indoor unit is controlled as shown in Fig 7 2 9 Fig 7 2 9 4 0 1 Room temp Preset temp C Cooling operation The louver moves to the position same as Hi POWER operation Cooling operation Fan only operation Heating operation RAS 18UFHP E RAS 18UFP E RAS 18UFPX...

Page 31: ...ing mode except the preset temperature is higher 2 C 4 The Hi POWER mode can not be set in Dry or Fan only operation 7 4 High Temperature Limit Control The microcontroller detects the indoor heat exchanger temperature to prevent pressure of a refrigerating cycle from increasing excessively The compressor and outdoor fan motor are controlled as shown in Fig 7 4 1 Fig 7 4 1 7 5 Low Temperature Limit...

Page 32: ... 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 When the unit is on standby Not operating When the unit is in operation Operation Motions Push TEMPORARY button for m...

Page 33: ...ton 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 When the unit is on standby Not operating 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 unit beeps three times The lamp ...

Page 34: ...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 35: ...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 36: ...thick heat resisting polyethylene foam Console Installation 6 Zeolite filter 7 Purifying filter Air filter 5 Filter frame 2 Wireless remote control 4 Remote control holder 9 Pan head wood screw Electric parts cover Extension drain hose 100 mm or more 600 mm or more 100 mm or more 600 mm or more 600 mm or more 24 Class Loop the connective cable about 100 mm in diameter and 300 350 mm long Vinyl tap...

Page 37: ...rant piping Liquid side 6 35 mm Gas side 12 70 mm RAS 18UF 15 88 mm RAS 24UF RAS 18UFPX T2 Pipe insulating material polyethylene foam 6 mm thick Putty PVC tapes Air outlet Air outlet Drain outlet Air inlet Secure the outdoor unit with fixing bolts and nuts if the unit is likely to be exposed to a strong wind Use 8 mm or 10 mm anchor bolts and nuts If it is necessary to drain the defrost water atta...

Page 38: ...e filter x 1 Purifying 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 Packaged with the outdoor unit Flexible pipe x 1 Pipe shield x 1 Part No 9 Others Owner s manual Installation manual Option For the Extension drain hose use an optionally available RB 821SW or commercially available one This model is not equipped with an ...

Page 39: ...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 40: ...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 41: ...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 42: ...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 43: ... 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 44: ...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 45: ...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 46: ...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 47: ...5 minutes if the piping length 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 th...

Page 48: ...to 8 0 kgf m 50 to 62 N m 5 0 to 6 2 kgf m 16 to 18 N m 1 6 to 1 8 kgf m 9 to 10 N m 0 9 to 1 0 kgf m No need to charge refrigerant Need to 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 20g m A Hexagonal wrench is required Stripping length of connecting cable Fig 8 5 8 Fig 8 5 9 CAUTION Wrong wiring connection may cause some electrical parts burn out ...

Page 49: ...fer to page 39 8 4 2 Fig 8 6 1 3 Select the terminal of selector switch from A position to B position Fig 8 6 2 REMOCON INSTALL A C B F 2 Set the remote control selector switch with the remote control B is indicated on the liquid crystal display when setting remote control selector switch to B A is not indicated on the display even if the selector switch is set to A 1 Load the remote control with ...

Page 50: ...eper will make a short beep Fig 8 8 2 8 8 3 Auto restart setting This product is designed so that after a power failure it can restart automatically in the 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 ...

Page 51: ...ation 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 OPERATIO...

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: ...ec Alphanumeric characters are used for the check code is 5 is 6 is A is B is C is D 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 00 01 02 1d 1E 22 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 faul...

Page 54: ...p 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 2 Check the in...

Page 55: ...ES 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 CN11 220 240V Replace Four way valve Circuit check modification Replace TC sensor YES NO YES NO YES YES NO NO YES NO Operation Measur...

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: ... 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 contr...

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: ...ible to detect DC 5V at Q60 and 12V at Q50 All lamps on indoor unit normal Are TD and TE sensors normal TD 17 9kΩ at 50 C TE 10kΩ at 25 C Is it possible to detect AC 220 240V at CN11 Does MG switch operate Refer to 9 9 Troubleshooting for Remote Control Check TA and TC sensors or refer to 01 04 in Table 9 4 1 Connect crossover cable properly Refer to 9 8 3 How to check outdoor P C board Replace MG...

Page 63: ...ormal Does compressor start Does compressor stop after a while Is gas quantity normal Check gas pressure Compressor is defective Replace P C board Replace compressor Compressor is defective Capacitor is defective Overload relay is defective Compressor is defective Gas shortage Gas leak Replace capacitor Replace overload relay Replace compressor Supply gas YES YES YES YES YES YES YES YES NO NO NO N...

Page 64: ...t one of 3 cases below and follow the procedure 1 The outdoor unit stops between 10 and 20 minutes passed after starting and it takes 10 minutes or more to restart the unit 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 Ref...

Page 65: ...ts Power relay indoor 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 TP2 and TP3 of CN12 220 240V AC 2 Between and of C02 DC310 340V 3 Between 12V and GND...

Page 66: ... the fan speed level to HIGH The unit compressor operates continuously in the above condition 1 Check whether or not the compressor operates 2 Check whether or not the OPERATION lamp blinks 1 Check it is impossible to detect the voltage between 3 and 4 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...

Page 67: ...tective operation Four times Emergency stop follows 18 Thermo sensor TE circuit All off 19 Heat exchanger sensor TD circuit 1E Heat exchanger sensor TD temperature rise protection 21 IOL operation Dip LED switch 1 Red 2 Yellow 3 Yellow 4 Yellow Table 1 Table 2 Timer short 18 Thermo sensor TE circuit 19 Heat exchanger sensor TD circuit 1E Heat exchanger sensor TD temp rise protection 21 IOL operati...

Page 68: ...FILE NO SVM 02008 67 9 8 4 P C board layout Top View Bottom View ...

Page 69: ...dicated Does 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 Replac...

Page 70: ...r 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 page 39 8 4 3 3 Insert the Grille stopper to the correct position and fix it securely with s...

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: ...s from the capacitor terminal 4 1 Unlatch the relay and pull it upward 2 Disconnect the lead wires from the relay terminal 5 1 Remove the transformer 2 screws 2 Disconnect the housing from the P C board 6 1 Disconnect the lead wires from the P C board 2 Remove the P C board after unhooking 4 clamps 7 1 Remove the spark killer 1 screw 2 Disconnect the lead wire from the terminal block 8 1 Remove th...

Page 76: ...al 4 1 Remove the relay 2 screws 2 Disconnect the lead wire from the terminal 5 1 Remove the transformer 2 screws 2 Disconnect the housing from the P C board 6 1 Disconnect the lead wire from the P C board 2 Remove the P C board after unhooking 4 clamps 7 1 Remove the spark killer 1 screw 2 Disconnect the lead wire from the terminal block 8 1 Remove the running capacitor with procedure 2 2 Remove ...

Page 77: ...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 E RAS 24UFHP E RAS 24UFHP ES 43T69312 used for these models RAS 24UFP E RAS 24UFPX E RAS 24UFP AR RAS 24UFPX T RAS 24UFP ES RAS 24UFP E RAS 18UFPX T2 43T69313 used for these m...

Page 78: ...cation Part Description No No 221 43T49303 Pipe Holder 222 43T19304 Cover Body L 223 43T19305 Cover Body R 224 43T19306 Cover Body LD 225 43T19307 Bush Body R 226 43T19308 Bush Body D 227 43T82302 Installation Plate 228 43T60314 Terminal Cover 229 43T62303 Connector Cover 230 43T83003 Remote control Holder 231 43T69309 Wireless Remote control 18UFHP E 231 43T69310 Wireless Remote control 232 43T85...

Page 79: ...ssy 15 88 219 43T03303 Back Body Assy 220 43T09314 Vertical Louver Location Part Description No No 221 43T49303 Pipe Holder 222 43T19304 Cover Body L 223 43T19305 Cover Body R 224 43T19306 Cover Body LD 225 43T19307 Bush Body R 226 43T19308 Bush Body D 227 43T82302 Installation Plate 228 43T60314 Terminal Cover 229 43T62303 Connector Cover 230 43T83003 Remote control Holder 231 43T69309 Wireless R...

Page 80: ...3T96001 Bushing 14 43043609 Condenser 15 43T43316 Sub Condenser 16 43T46016 Valve Packed 6 35 17 43T47020 Bonnet 6 35 Dia 18 43T46019 Valve Packed 12 7 19 43T47018 Bonnet 1 2 Dia Location Part Description No No 20 43T47309 Tube Capillary 0 8 Dia 21 43T47007 Tube Capillary 1 2 Dia 22 43T47013 Tube Capillary 2 0 Dia 24 43T41800 Compressor PH250X3 4LM 25 43T49011 Base Spring A 26 43T49019 Spring Buff...

Page 81: ...50Hz 12 43T47001 Nut Flange 13 43T69001 Bushing 14 43T43301 Condenser 15 43T43314 Sub Condenser 16 43T46016 Valve Packed 6 35 Location Part Description No No 17 43T47020 Bonnet 6 35 Dia 18 43T46019 Valve Packed 12 7 19 43T47018 Bonnet 1 2 Dia 23 43T47025 Tube Capillary 2 4 Dia 24 43T41800 Compressor PH250X3 4LM 25 43T49011 Base Spring A 26 43T49019 Spring Buffer 27 43T49012 Base Spring B 28 43T550...

Page 82: ...ary 2 4 Dia 16 43T60035 Terminal Block 4P 17 43T60036 Terminal Block 3P 30A 18 43T60037 Filter Clamp Location Part Description No No 19 43141301 Compressor PH280X3 4MS 20 43T62014 Protector Cord 21 43T62015 Protector Cord 22 43T49011 Base Spring A 23 43T49019 Spring Buffer 24 43T49012 Base Spring B 25 43T21013 Motor Fan AC220 240V 50Hz 25 43T21014 Motor Fan AC220 240V 50Hz 26 43T20010 Fan Propelle...

Page 83: ...lter Clamp 19 43T41313 Compressor PH310X3 4MM 20 43T62014 Protector Cord 21 43T62015 Protector Cord 11 7 Outdoor Unit RAS 24UAH E Location Part Description No No 22 43T49011 Base Spring A 23 43T49019 Spring Buffer 24 43T49012 Base Spring B 25 43T21306 Motor Fan AC220 240V 50Hz 26 43T20010 Fan Propeller 490 27 43T96001 Bushing 28 43T96004 Bushing Cord 29 43T62013 Cover E Parts 30 43T52301 Switch Ma...

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Toshiba RAS-18UA-AR, Service Manual

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