Toshiba RAS-18UA-AS2 Service Manual Download Page 3 | Manualshive

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Toshiba RAS-18UA-AS2 Service Manual Download Page 3

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FILE NO. SVM-03009

9.

TROUBLESHOOTING CHART

9-1 Troubleshooting 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 Part
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-24UAH-ES-1, RAS-24UA-ES-1)
10-3 Outdoor Unit (RAS-18UAH-ES2)
10-4 Outdoor Unit (RAS-18UA-ES2)

11. EXPLODED VIEWS AND PARTS LIST

11-1 Indoor Unit (E - Parts Assy)
11-2 Indoor Unit
11-3 Outdoor Unit (RAS-24UAH-ES-1)
11-4 Outdoor Unit (RAS-18UAH-ES2)
11-5 Outdoor Unit (RAS-24UA-ES-1)
11-6 Outdoor Unit (RAS-18UA-ES2)

•

This air conditioner is charged with

HFC (R410A) that doesn’t deplete the

Ozone layer.

•

This air conditioner requires special

installation for the refrigerant R410A.

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Summary of Contents for RAS-18UA-AS2

Page 1: ... MANUAL AIR CONDITIONER SPLIT WALL TYPE Feb 2003 RAS 24UKHP ES 1 RAS 24UAH ES 1 RAS 18UKHP ES2 RAS 18UAH ES2 RAS 24UKP ES 1 RAS 24UA ES 1 RAS 18UKP ES2 RAS 18UA ES2 18 Class Heat pump model 24 Class 18 Class Cooling only model ...

Page 2: ... 5 Outdoor Unit RAS 24UA ES 1 4 6 Outdoor Unit RAS 18UA ES2 5 REFRIGERATION CYCLE DIAGRAM 5 1 RAS 24UKHP ES 1 RAS 24UAH ES 1 5 2 RAS 18UKHP ES2 RAS 18UAH ES2 5 3 RAS 24UKP ES 1 RAS 24UA ES 1 5 4 RAS 18UKP ES2 RAS 18UA ES2 6 CONTROL BLOCK DIAGRAM 6 1 RAS 24UKHP ES 1 RAS 18UKHP ES2 6 2 RAS 24UKP ES 1 RAS 18UKP ES2 7 OPERATION DESCRIPTION 7 1 Outline of Air Conditioner Control 7 2 Description of Oper...

Page 3: ...oubleshooting for Remote Control 10 PARTS REPLACEMENT 10 1 Indoor Unit 10 2 Outdoor Unit RAS 24UAH ES 1 RAS 24UA ES 1 10 3 Outdoor Unit RAS 18UAH ES2 10 4 Outdoor Unit RAS 18UA ES2 11 EXPLODED VIEWS AND PARTS LIST 11 1 Indoor Unit E Parts Assy 11 2 Indoor Unit 11 3 Outdoor Unit RAS 24UAH ES 1 11 4 Outdoor Unit RAS 18UAH ES2 11 5 Outdoor Unit RAS 24UA ES 1 11 6 Outdoor Unit RAS 18UA ES2 This air co...

Page 4: ...ide size mm 12 7 Connection type Flare connection Liquid side size mm 6 35 Interconnection Connection type Flare connection pipe Maximum length m 15 1 One way 25 2 20 2 Maximum height m 10 8 difference INDOOR UNIT RAS 24UKHP ES 1 RAS 24UKP ES 1 RAS 18UKHP ES2 RAS 18UKP ES2 Height mm 298 Dimensions Width mm 998 Depth mm 208 Net weight kg 12 Evaporator type Finned tube Indoor fan type Cross flow fan...

Page 5: ...P ES2 RAS 18UAH ES2 RAS 24UKP ES 1 RAS 24UA ES 1 RAS 18UKP ES2 RAS 18UA ES2 1 No need to charge 15m or less 15m or less extra refrigerant 2 Need to charge Over 15m up to 25m 20g m Over 15m up to 20m 20g m extra refrigerant Temperature Condition JIS C9612 1994 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 ...

Page 6: ...5 7 51 100 40 48 450 20 20 48 100 6 5 998 298 10 763 5 55 55 55 41 29 57 18 160 6 5 8 Back body Knock out system Front panel Grille inlet Knock out system Connection pipe 0 39m Flare 12 7 Connection pipe 0 49m Wireless remote control Flare 6 35 For stud bolt 6 Drain hose 0 54m Installation Plate outline Outline of indoor unit ...

Page 7: ...8 310 340 340 pitch 12 12 364 A 12x18 hole A Detail Drawing 25 Drain outlet 52 Handle Installation dimension 600 100 or more 100 or more 600 or more 600 or more Air outlet Air inlet Electric Parts cover Liquid side Flare 6 35 Gas side Flare 12 7 Service Port 600 340 23 68 Handle 4 12X18 for 8 10 anchor bolt ...

Page 8: ... unit 6 11x14 holes or 8 10 anchor bolt Fan guard 420 Electric Parts cover Liquid side Flare 6 35 Gas side Flare 12 7 Installation dimension 100 or more Air inlet 600 or more 100 or more Air inlet Air outlet 600 or more 600 50 35 4x 11x14 for 8 10 anchor bolt 600 344 325 91 54 60 50 90 600 830 90 120 52 23 325 Handle 538 300 Service Port ...

Page 9: ...unit A 325 120 4 11x14 hole for 8 10 anchor bolt Liquid side Flare 6 35 Gas side Flare 12 7 52 5 Service Port Electric parts cover 344 27 130 100 Installation dimension 100 or more Air inlet 600 or more 100 or more Air inlet Air outlet 600 or more 4x 11x14 or 8 10 anchor bolt 600 325 23 301 325 11x14 hole 6 hole R10 600 Detail Drawing 50 35 A ...

Page 10: ... IC04 C15 CN23 BLK WHI RED GRN YEL CN30 CN31 C01 R01 R09 R21 R22 BLK P04 SG01 DSA VARISTOR T6 3A 250V IC02 DISCHARGE PIPE SENSOR TD HEAT EXCHANGER SENSOR TE CN08 CN07 BLU BLU BLK BLK 1 1 2 3 3 1 1 2 3 3 DC15V DC0V DC12V DC7V DC0V 3 1 2 i L N 3 1 2 i FERRITE CORE GRN YEL RED RED BLK BLK MAGNETIC CONTACTOR R A1 A2 52C U S V T W PNK WHI COMPRESSOR TERMINAL BLK S R C WHI BLK BLK COIL FOR 4 WAY VALVE R...

Page 11: ...6 IC01 IC T01 IC04 C15 CN23 BLK WHI RED GRN YEL CN30 CN31 C01 R01 R09 R21 R22 BLK P04 SG01 DSA VARISTOR T6 3A 250V IC02 DC15V DC0V DC12V DC7V DC0V DISCHARGE PIPE SENSOR TD HEAT EXCHANGER SENSOR TE CN08 CN07 BLU BLU BLK BLK 1 1 2 3 3 1 1 2 3 3 3 1 2 i L N 3 1 2 i FERRITE CORE GRN YEL RED RED BLK BLK RELAY 11 12 13 14 15 16 PNK WHI COMPRESSOR TERMINAL BLK S R C WHI BLK BLK RED RED RED CAPACITOR CAPA...

Page 12: ...BLK BLK BLK F01 FUSE RY04 DB01 FAN MOTOR LOUVER MOTOR MAIN P C BOARD MCC 821 L01 BLU BLU BLU BLU BLU BLU BLU BLU WHI DC MOTOR CN 07 CN 10 C02 C06 IC02 IC01 IC T01 IC04 C15 BLK WHI GRN YEL RED C01 R01 R09 R21 R22 BLK P04 SG01 DSA VARISTOR T6 3A 250V DC15V DC0V DC12V DC7V DC0V CN30 CN31 CN27 GREEN GRN YELLOW 3 1 2 i L N 3 1 2 i GRN YEL RED RED RED RED BLK BLK CHASSIS THERMOSTAT ORN ORN POWER SUPPLY ...

Page 13: ... CN03 CN01 CN25 CN13 BLK BLK BLK BLK F01 FUSE DB01 FAN MOTOR LOUVER MOTOR MAIN P C BOARD MCC 821 L01 BLU BLU BLU BLU BLU BLU BLU BLU WHI DC MOTOR CN 07 CN 10 C02 C06 IC02 IC01 IC T01 IC04 C15 BLK WHI GRN YEL RED CN30 CN31 CN27 C01 R01 R09 R21 R22 BLK P04 SG01 DSA VARISTOR T6 3A 250V DC15V DC0V DC12V DC7V DC0V RY04 3 1 2 i L N 3 1 2 i GRN YEL RED RED ORN ORN RED BLK BLK BLK BLK BLK GRN YEL CHASSIS ...

Page 14: ... RF 5TK4R7 4 7Ω 5W 13 Louver motor MP35EA12 Output Rated 2W 10poles 1phase DC 12V 4 2 Outdoor Unit RAS 24UAH ES 1 No Parts name Type Specifications Output Rated 2200W 2poles 1 phase 220 240V 50Hz 1 Compressor PA290X3F 4MS Winding resistance Ω Red Black White Black at 20 C 1 07 2 20 Output Rated 65W 6poles 1 phase 220 240V 50Hz 2 Fan motor for outdoor KFG6 71SB5P T1 Winding resistance Ω Red Black W...

Page 15: ...sformer TT 05 220 240V 9 Microcomputer TMP47C840N 10 Varistor R73 R74 15G471K 470V 11 Fuse F01 MT3 T6 3A 250V 4 4 Indoor Unit RAS 24UKP ES 1 RAS 18UKP ES2 No Parts name Type Specifications 1 Fan motor for indoor ICF 340 30 2 DC 340V 30W 2 Thermo sensor TA sensor 10kΩ at 25 C 3 DC DC transformer T01 SWT 58A DC 390V Secondary DC 15V 12V 7V 4 Microcontroller TMP87CM40AN 5 Heat exchanger sensor 10kΩ a...

Page 16: ...370V 45µF for compressor 5 Bimetal thermostat CS 7C Open 130 5 C Close 70 10 C 6 Magnetic contactor A35 220 240V 50Hz 4 6 Outdoor Unit RAS 18UA ES2 No Parts name Type Specifications Output Rated 1500W 2poles 1 phase 220 240V 50Hz 1 Compressor PA225X3F 4L Winding resistance Ω Red Black White Black at 20 C 1 35 2 68 Output Rated 42W 6poles 1 phase 220 240V 50Hz 2 Fan motor for outdoor HF 240 42B Win...

Page 17: ...10 Standard 0 9 11 0 High 27 19 35 24 Cooling Overload 0 8 12 0 High 32 23 43 26 Low temperature 0 5 1 0 Low 21 15 21 15 Standard pressure P MPaG Surface temp of heat exchanger interchanging pipe T1 C Fan speed indoor 50Hz Heat exchanger Indoor unit Cross flow fan Cooling Heating 4 way valve Heating Cooling Compressor Condenser Propeller fan Outdoor unit PA290X3F 4MS Cooling Heating Mark means che...

Page 18: ...d 0 9 10 0 High 27 19 35 24 Cooling Overload 1 0 15 0 High 32 23 43 26 Low temperature 0 6 1 0 Low 21 15 21 15 Fan speed indoor 50Hz Standard pressure P MPaG Surface temp of heat exchanger interchanging pipe T1 C Indoor unit Cross flow fan Cooling Heating 4 way valve Heating Cooling Compressor Condenser Propeller fan Outdoor unit PA225X3F 4L Cooling Heating Mark means check points of Gas Leak O D ...

Page 19: ...ow 21 15 21 15 Fan speed indoor 50Hz Standard pressure P MPaG Surface temp of heat exchanger interchanging pipe T1 C Heat exchanger Indoor unit Cross flow fan Cooling Cooling Compressor Condenser Propeller fan Outdoor unit PA290X3F 4MS Cooling Mark means check points of Gas Leak O D 12 7mm O D 6 35mm Cooling Packed valve Gas container connection Reinstall etc 12 7 Packed valve 6 35 0 49m Connectin...

Page 20: ...ure 0 6 2 0 Low 21 15 21 15 Fan speed indoor 50Hz Standard pressure P MPaG Surface temp of heat exchanger interchanging pipe T1 C Indoor unit Cross flow fan Cooling Cooling Compressor Condenser Propeller fan Outdoor unit PA225X3F 4L Cooling Mark means check points of Gas Leak O D 12 7mm O D 6 35mm Cooling Packed valve 12 7 Packed valve 6 35 0 39m Connecting pipe 12 7 0 49m Connecting pipe 6 35 T1 ...

Page 21: ...Motor Revolution Control Processing Timer Serial Signal Communication Louver ON OFF Signal Louver Driver Serial Signal Transmitter Receiver Serial Signal Communication Operation Display Timer Display Filter Sign Display PRE DEF Sign Display Indoor Fan Motor Hi Power Sign Display Louver Motor Infrared Rays Remote Control Temperature Processing Remote Control Operation START STOP Operation Mode Sele...

Page 22: ...er Control 3 minute Delay at Restart for Compressor Motor Revolution Control Processing Timer Louver ON OFF Signal Louver Driver Operation Display Timer Display Filter Sign Display Fan Only Sign Display Indoor Fan Motor Hi Power Sign Display Louver Motor Infrared Rays Remote Control Temperature Processing REMOTE CONTROL Remote Control Operation START STOP Operation Mode Selection AUTO COOL DRY FAN...

Page 23: ...ds to the outdoor unit controller The outdoor unit controller receives 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 the air inlet of the indoor heat exchanger by the indoor temperature senso...

Page 24: ...stant air flow NOTE 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 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 lamp are controlled as shown in Fig 7 2 2 Fig 7 2 2 ...

Page 25: ...p are controlled as shown 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...

Page 26: ...ion 1 One 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 p...

Page 27: ...eset 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 Heat pump model only 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 28: ...o restart function proceed 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...

Page 29: ... to turn off filter check 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 appro...

Page 30: ...re also required Accordingly special tools are required for the new refrigerant R410A as shown below For connecting pipes use new and clean piping materials with high pressure withstand capabilities designed for R410A only and ensure that water or dust does not enter Moreover do not use any existing piping as its pressure withstand may be insufficient and may contain impurities New Refrigerant Air...

Page 31: ...roperly earthed Appliance shall be installed in accordance with national wiring regulations If you detect any damage do not install the unit Contact your TOSHIBA dealer immediately CAUTION Exposure of unit to water or other moisture before installation could result in electric shock Do not store it in a wet basement or expose to rain or water After unpacking the unit examine it carefully for possi...

Page 32: ...ng Insert the cushion between the indoor unit and wall and lift the indoor unit for better operation Wall The auxiliary piping can be connected the left rear left rear right or bottom Insulate the refrigerant pipes separately with insulation not together 6 mm thick heat resisting polyethylene foam Left Rear left Right Rear Bottom Attach to the front panel Attach to the air filter 6 Zeolite filter ...

Page 33: ...or 10 mm anchor bolts and nuts If it is necessary to drain the defrost water attach drain nipple 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 7 mm Pipe insulating material polyethylene foam 6 mm thick Putty PVC tapes Air inlet Drain outlet 600 mm 120 mm 64 mm Air outlet 340 mm Air...

Page 34: ...t No 4 5 6 Part No 7 8 9 Others Name Owner s manual Installation manual The part marked with asterisk is packaged with the outdoor unit This model is not equipped with an extension drain hose Option For the extension drain hose use an optionally available RB 821SW or commercially available one Part name Q ty Purifying filter x 2 Mounting screw 4 x 25 s x 8 Pan head wood screw 3 1 x 16 s x 2 Drain ...

Page 35: ...rigerant from being charged each port diameter has been changed Charge hose In order to increase pressure withstand strength hose materials and port size have been changed to 1 2 UNF 20 threads per inch When purchasing a charge hose be sure to confirm the port size Electronic balance As pressure is high and gasification speed is fast for refrigerant charging it is difficult to read the indicated v...

Page 36: ...arest TV set or stereo equipment This is necessary to prevent image disturbances or noise interference The location of the remote control should be determined as shown below Fig 8 4 1 5 m 5 m 45 45 75 7 m 7 m Top view Indoor unit Axial distance Reception range Reception range Remote control Indoor unit Remote control Side view 8 4 2 Cutting a hole and mounting installation plate Cutting a hole Whe...

Page 37: ...ult in personal injury and property damage if the unit falls In case of block brick concrete or similar type walls make 5 mm dia holes in the wall Insert clip anchors for appropriate mounting screws 8 NOTE Secure four corners and lower parts of the installation plate with 6 to 8 mounting screws to install it Installation plate Keep horizontal direction 8 4 3 Electrical work 1 The supply voltage mu...

Page 38: ...nnecting cable with the cord clamp 8 Fix the terminal cover rear plate bushing and air inlet grille on the indoor unit Front panel Earth line Connecting cable 2 1 Cord clamp Terminal block Screw Terminal cover Screw Air Inlet grille CAUTION Be sure to refer to the wiring system diagram labeled inside the front panel Check local electrical cords and also any specific wiring instructions or limitati...

Page 39: ...n the wall After passing the connecting pipe through the pipe hole connect the connecting pipe to the auxiliary pipes and wrap the facing tape around them CAUTION Bind the auxiliary pipes two and connecting cable with facing tape tightly In case of leftward piping and rear leftward piping bind the auxiliary pipes two only with facing tape Carefully arrange pipes so that any pipe does not stick out...

Page 40: ...m Drain hose Shield pipe Extension drain hose Wall Drain guide Space for pipes Do not put the drain hose end in the drainage ditch Do not form the drain hose into a wavy shape Do not put the drain hose end into water Do not rise the drain hose 50 mm or more 8 4 6 Indoor unit fixing 1 Pass the pipe through the hole in the wall and hook the indoor unit on the installation plate at the upper hooks 2 ...

Page 41: ... a duct or a wind shield 3 In particularly windy areas install the unit such as to avoid admission of wind 4 Installation in the following places may result in trouble Do not install the unit in such places A place full of machine oil A saline place such as the coast A place full of sulfide gas A place where high frequency waves are likely to be generated as from audio equipment welders and medica...

Page 42: ...oth side of Gas and Liquid 7 Remove the charging hose from the service port 8 Securely tighten the caps on the packed valves Fig 8 5 6 Tightening torque of flare pipe connections The operating pressure of R410A is higher than that of R22 Approx 1 6 times It is therefore necessary to firmly tighten the flare pipe connecting sections which connect the indoor and outdoor units up to the specified tig...

Page 43: ...t 3 When connecting the connecting cable to the outdoor unit terminal make a loop as shown in the installation diagram of indoor and outdoor unit to prevent water coming in the outdoor unit 4 Insulate the unused cords conductors from any water coming in the outdoor unit Proceed them so that they do not touch any electrical or metal parts Stripping length of connecting cable Fig 8 5 8 CAUTION Wrong...

Page 44: ...nd Front panel Refer to page 63 10 1 3 Select the terminal of selector switch from A position to B position Fig 8 6 1 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 the batteries 2 Pr...

Page 45: ...connections Indoor unit Valve stem cap connection TEMPORARY button D C A B 8 7 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 TEMPOR...

Page 46: ...rned on 8 The operation mode changes in the Automatic operation 9 The Fan only operation continues in the Automatic operation 10 The ECO operation or Hi POWER operation does not work 11 When Hi POWER button is pressed the display on the remote control does not change at all No Operation of air conditioner Descriptions The OPERATION lamp blinks to indicate that power is turned on If the START STOP ...

Page 47: ... E OPERATION lamp is blinking 5Hz F OPERATION and TIMER lamps are blinking 5Hz G OPERATION TIMER and PRE DEF or FAN ONLY for cooling only model lamps are blinking Table 9 3 2 Diagnosis by detective operation The remote control does not work The outdoor fan does not rotate Turn off the power supply once then turn it on Try to operate the remote control The compressor operates The compressor does no...

Page 48: ...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 code on the display of the remote control 2 digits alphanumeric will be indicate...

Page 49: ...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 50: ...ect crossover wires properly Connect connector properly Indoor P C board is defective Replace P C board Operation Check item Conceivable principle cause Measure Item by symptoms Does four way valve operate properly 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 Indo...

Page 51: ... Outdoor P C board is defective Indoor P C board is defective Is TC sensor resistance value 10kΩ at 25 C normal Failure 09 Other cycle error 1 Heat pump model 09 Other cycle error 2 Clean filters Replace TC sensor Charge refrigerant Replacd P C board Anti freezing operation Anti freezing operation Does indoor fan operate Are filters clogged Is charged amount of refrigerant normal Is outside air lo...

Page 52: ... Connect CN04 properly Replace TA sensor Replace P C board NO NO YES YES Is CN05 TC sensor connector connected properly Is TC sensor resistance value 10 kΩ at 25 C normal Indoor P C board is defective Connect CN05 properly Replace TC sensor Replace P C board NO NO YES YES Is TE sensor connector connected properly Is TE sensor resistance value 10 kΩ at 25 C normal Indoor P C board is defective Conn...

Page 53: ... Replace TD sensor Replace P C board NO NO NO YES NO YES YES NO YES Is protective controller 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...

Page 54: ...tor Is voltage DC 12V or 5V indicated on rear of indoor control board normal Is fuse F01 of indoor control board blown Parts R21 R22 SG01 C15 C01 DB01 C02 IC01 and T01 are defective Are DC 15V DC 12V or DC 7V supplied to secondary side of transfer switch Transfer switch IC IC01 for power supply or fan motor is defective Replace motor Does the fan motor connector between 1 and 2 short circuit Micro...

Page 55: ...etween 4e and 3d of motor connector CN10 Start to operate the indoor unit in except heating operation At this time is it possible to detect DC 1V or more between 5e and 3d of motor connector CN10 Is it possible to rotate cross flow fan by hand properly Turn off indoor unit and rotate cross flow fan by hand when the unit is on standby At this time is it possible to detect DC 1V or more between 5e a...

Page 56: ...s 2 Remove the cover of the fan motor lead wires 3 Check DC voltage with CN10 connector while the fan motor is rotating NOTE Do not disconnect the connector while the fan motor is rotating Use a thin test rod DC P C board CN10 6 Blue 5 Yellow 4 White 3 Black 2 1 Red Black Yellow Indoor fan starts rotating when power supply is turned on Check output DC voltage of fan motor on P C board Measure volt...

Page 57: ... normal Does compressor start Does compressor stop after a while Is gas quantity normal Check gas pressure Compressor is defective Replace Compressor YES YES YES YES YES YES YES YES YES YES YES YES NO NO NO NO NO NO NO NO NO NO Is resistance value of thermo sensor TA and heat exchanger sensor TC normal Microcontroller is defective Miniature relay RY04 is defective Compressor is defective Capacitor...

Page 58: ...of transfer YES YES YES YES YES YES YES Turn on power supply Does OPERATION lamp blink YES NO Refer to item Power can not be turned on NO NO Refer to 9 9 Troubleshooting for Remote Control Connect crossover cable properly NO Replace transfer NO Replace outdoor P C board Replace sensors NO Replace outdoor P C board NO Replace MG switch NO Check TA and TC sensors or refer to 01 04 in Table 9 4 1 Doe...

Page 59: ...or cords normal Is 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 ...

Page 60: ...Select 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 1 3 Terminal block on indoor side S5277G Terminal block Tester S5277G or equivalent G or J type Diode with rated voltage of 400V or more is acceptable Red White 2 The outdoor unit stops once it would not operate until th...

Page 61: ...L01 resistor R01 or the diode DB01 is defective 3 IC01 IC02 and T1 are defective 4 IC01 IC02 and T1 are defective 5 IC01 IC02 IC07 and T01 are defective Heat pump model IC05 and IC06 are defectice Cooling only model 1 The wire of the relay coil RY04 comes down or the relay drive Q33 is defective 2 CN27 or RY04 is connected wrongly The lamps are defective or the housing assembly CN13 is defective C...

Page 62: ...changer is extremely low 2 The connection of the heat exchanger sensor is loose The connector is disconnected CN01 3 The heat exchanger sensor and the P C board are defective Refer to Table 9 8 2 4 The main P C board is defective 1 The temperature of the indoor heat exchanger is extremely high 2 The connector of the heat exchanger sensor short circuited CN01 3 The heat exchanger sensor and the P C...

Page 63: ...FILE NO SVM 03009 61 9 8 3 P C Board layout Top View Bottom View ...

Page 64: ...te 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 control The unit does not beep...

Page 65: ...et 3 Check the gap between the front panel and the back body If you operate the air conditioner in cooling or dry operation without pushing the 3 places the surface of the front panel may be covered with frost and have dewdrops 1 Remove the front panel with the procedure 1 2 Remove the screw fixing the electrical part box 3 Remove the drain guide 4 Remove the connector 5P for the fan motor and the...

Page 66: ... exchanger with procedure 4 2 Loosen the set screw of the cross flow fan 3 Remove 2 screws fixing the bearing base and the back body 4 Pull the cross flow fan toward you 1 Remove the front panel electrical parts assembly horizontal grille heat exchanger and the cross flow fan with procedure 5 2 Remove the bearing from the bearing base If the housing protrudes from the base bearing put the housing ...

Page 67: ...move the fixing screw 2 screws 4 x 10L 3 Disconnect the housing from the P C Board 1 Perform the common procedure 1 2 Disconnect the lead wires from the P C Board 3 Remove P C Board after unhooking 4 clams 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 Perform the common procedure 1 2 Remove the terminal cover of compresso...

Page 68: ...sconnect the lead wires from the capacitor terminal 1 Perform the common procedure 1 2 Remove the fixing screw 1 screw 4 x 10L 3 Disconnect the lead wires from the capacitor terminal 1 Perform the common procedure 1 2 Unlatch the relay and pull it upward 3 Disconnect the lead wires from the relay terminal 1 Perform the common procedure 1 2 Remove the fixing screw 2 screws 4 x 10L 3 Disconnect the ...

Page 69: ...or terminal 1 Perform the common procedure 1 2 Remove the fixing screw 1 screw 4 x 10L 3 Disconnect the lead wires from the capacitor terminal 1 Perform the common procedure 1 2 Unlatch the relay and pull it upward 3 Disconnect the lead wires from the relay 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 Perform th...

Page 70: ...lock 3P 3P AC300V 20A 403 43T50004 Sensor Heat Exchanger 10kΩ 25 C 404 43T69005 Sensor Thermostat 10kΩ 25 C Location Part Description No No 405 43T69066 P C Board ASSY WRS LED MCC 819 406 43T69064 P C Board ASSY MCC 821 407 43T69065 P C Board ASSY MCC 821 408 43T62003 Clamp Cord 406 Heat pump model 407 Cooling only model 408 402 404 405 403 ...

Page 71: ... Plate EVA Seal 220 43T49039 Holder Plate EVA Seal 221 43T49038 Plate EVA Seal Location Part Description No No 222 43T49037 Holder Plate EVA Seal 223 43T79007 Guide Drain 224 43T39016 Fix Motor 225 43T60075 Fan Motor Cord 226 43T21327 Motor Fan 227 43T20014 Fan Cross Flow 228 43T22008 Bearing 229 43T39015 Base Bearing 230 43T03013 Back Body ASSY 231 43T07022 Holder Pipe 232 43T82007 Plate Installa...

Page 72: ...290X3F 4MS 19 43T62014 Protector Cord 20 43T62015 Protector Cord 21 43T49011 Base Spring A Location Part Description No No 22 43T49012 Base Spring B 23 43T49019 Spring Buffer 24 43T21315 Motor Fan AC 220 240V 50Hz 25 43T20301 Fan Propeller 491 26 43T96001 Bushing 27 43T96004 Bushing Cord 28 43T62013 Cover E Parts 29 43T52305 Switch Magnet A35 220 240V 50Hz 30 43T55316 MF Capacitor 45µF 370V 31 43T...

Page 73: ...lve Packed 12 7Dia 18 43T47018 Bonnet 12 7Dia Location Part Description No No 19 43T47308 Capillary Tube 1 0Dia 20 43T47014 Capillary Tube 1 7Dia 21 43T49011 Base Spring A 22 43T49012 Base Spring B 23 43T49019 Spring Buffer 24 43T55316 MF Capacitor 45µF 370V 25 43T55318 MF Capacitor 2µF 450V 26 43T60324 Terminal Block 6P 27 43T41311 Compressor PA225X3F 4L 28 43T54005 Relay Power VC 20FA 29 43T4631...

Page 74: ...minal Block 6P 18 43T41310 Compressor PA290X3F 4MS 19 43T62014 Protector Cord 20 43T62015 Protector Cord Location Part Description No No 21 43T49011 Base Spring A 22 43T49012 Base Spring B 23 43T49019 Spring Buffer 24 43T21314 Motor Fan AC 220 240V 50Hz 25 43T20301 Fan Propeller 491 26 43T96001 Bushing 27 43T96004 Bushing Cord 28 43T62013 Cover E Parts 29 43T52305 Switch Magnet A35 220 240V 50Hz 3...

Page 75: ...net 6 35Dia Location Part Description No No 17 43T46318 Valve Packed 12 7Dia 18 43T47018 Bonnet 12 7Dia 19 43T47014 Capillary Tube 1 7Dia 21 43T49011 Base Spring A 22 43T49012 Base Spring B 23 43T49019 Spring Buffer 24 43T55316 MF Capacitor 45µF 370V 25 43T55318 MF Capacitor 2µF 450V 26 43T60324 Terminal Block 6P 27 43T41311 Compressor PA225X3F 4L 28 43T54005 Relay Power VC 20FA 36 43T43311 Sub Co...

Page 76: ... 74 FILE NO SVM 03009 TOSHIBA CARRIER THAILAND CO LTD 144 9 MOO 5 BANGKADI INDUSTRIAL PARK TIVANON ROAD TAMBOL BANGKADI AMPHUR MUANG PATHUMTHANI 12000 THAILAND ...

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