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AW NO. 0013E SERVICE MANUAL ROOM AIR

Contents

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3. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 L Control P W B B _ P _ B _ _ B _ _ B _ s _ _ _ _ _ _ _ _ _ _ XA 2P Top gt 12 CN10_ XA 6P To Temperature fuse 1 of terminal board 102 C Built in terminal board 1 1 L101 t ae Wa R121 ant T5 T L111 T 1 _ O Ec L 5 S O B Ser Indoor Fan Motor 0121
4. 23 841 335 26 750 65 27 5 288 95 J i LJ 3 X UGE S AO A NS FT 2777 c SO s ol i i Y 5 Air outlet Air suction e 202 10 Rear side Handle Air suction e o 50 Holed for anchor bolt D 2 12X16 slots for 8 0 bolt g Notch for for 2 8 0 bolt 7 12 il Fixing hol 35 ngoe 500 125 Drain hole p Service space Z x M h More than S ore than 100 AA B 200 gt 841 NS lt i More than 300 23 Thermostat Specifications MODEL RAS 25JX5 RAS 35JX5 THERMOSTAT MODEL IC OPERATION MODE COOL HEAT TEMPERATURE C P FAN MOTOR INDICATION 16 7 62 1 18 7 65 7 16 16 0 60 8 19 3 66 7 INDICATION 24
5. 16 15 14 13 12 11 10 9 BOARD 8 MOUNTING POWER SME 7 AXIAL MAIN P W B 6 R RADIAL 5 H MANUAL INSERT 4 PRESSOR C CHIP SMT 3 2 P _ E _ _ E CAPACITOR TYPE _ m gt x WHITE CERAMIC P W B YELLOW FILM MAIN t K amp RED ELECTROLYTIC INSERT TRANSISTORS TABO3 1 ee ae CAPACITORS _ EIE RESISTORS CAPACITORS RATING SYMBOL MODEL 11 z DEI ATING SYMBOL ime 2 8 CIM LI BLUE Lig 0 TORS R VALUE HF 2 e 2412 POWER LI T RESISTORS SYMBOL OR 8 8 2200 2s 2 OWR 5 TERMINAL 2d I 199 YELLOW C100 110 HEATING 5 SYMBOL UM 5 8 C01 470p 50 C 58 114YSA BOARD FUSE 12 V 4l e i Ka SYMBOL ie 2K 5 his c M 10 50 O106_ DTC Ora OV RL2 8 3 1 5 5 1 4 P 1 C M C02 5 5 LJ R007 zz 8 12 4 I R01 ua ale R249 20K 1500p 50
6. SEM s z DBI AA C007 C012 C014 R41 i 102 R002 su B C008 C018 C015 AA SME TRANS C 35V a gt 221605 R23 D 0V R43 14115 TS C313 R45 R46 e Bis 415V gt 6 41006 R24 Ld 16 B 12V 15 0V D22 7002 R44 031 18 gt e 12V z 607 R25 jM T 12 19 0v D02 D24 32 6 e LM 22 Et SL zi 151 6 3h zu 003 Ctomt STR L472 de ic 621 1 gt 820 i D04 PQ2 He 3 ee 2 20X21 i i e T C24 i 1 t uS teet 210 x PQ2 Microcomputer C11 RO5 aan R13 R34 JS chy 54 MAIN SUPPLY ON OFF Ta Q106 Fig 5 1 n the power circuit for P W B power supply for microcomputer peripheral circuits and IPM driver circuit and as well as DC 35V are produced by switching power circuit Switching power circuit performs voltage conversion effectively by switching transistor IC1 to convert DC 330V voltage to high frequency of about 20kHz to 200kHz 66 The voltage specification of the power circuit is as follows Check points Output Voltage Main
7. i m Ars id C 7 Pawls to fix P W B 4 places N EK Cz 3 HOW REMOVE CONTROL P W B 1 Remove the securing screws for electric part cover S CN3 CN7 connecters and black and white wire of terminal A B and then remove the electric part cover S 2 Remove the CN2 Cn8 connecters from the control P W B 3 Remove the upper part of securing pawls 2 places and then remove the board HOW TO REMOVE INDICATING P W B at display panel 1 Remove CN2 connecters from the control P W B or indicating P W B 2 Remove the upper part of securing pawls 2 places and then remove the board HOW TO REMOVE INDICATING P W B at switch 1 Remove 8 connecters from the control P W B or indicating P W B 2 Remove the right side of securing pawls and then remove the board 83 Other Cautions 1 Cautions concerning ICP IC Protector 1 Use due caution for short circuit in servicing Short circuit will open the ICP immediately 2 When the ICP opens remove the cause of this phenomenon and replace the ICP If the remedy is improper the ICP may open again 35V line e M ICP2 Indoor unit fan motor 0 12 Power circuit gt 12V line ICP1 20121 Power circuit line 20V Zener Dio
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10. SERVICE SWITCH 1 If interface signal DC 35V terminals C and D are not connected when the outdoor unit is in forced cool mode the outdoor unit defect indicator LD301 will blink 9 times during operation to indicate communication error 2 If checking is done with the compressor connector disconnected the unit will stop and LD301 will blink 4 times Be sure to push the service switch for a second again to stop the forced cool operation HOW TO OPERATE THE OUTDOOR UNIT INDEPENDENTLY 1 Connect the large dia pipe side and small dia pipe side service valve using a pipe Parts to prepared E Connect the small diameter service value and the large diameter service valve using the reducing union and copper pipe as shown on the right Charge refrigerant of 300g after vacuuming 1 Outdoor unit I Reversing 1valve 1 Large dia service valve Reducing union 2 2 8 and 3 8 4 Copper pipe 2 8 Small diameter service valve 1 Reducing union 2 8 6 35 mm 3 8 9 52 mm 2 Copper pipe 2 8 and 3 8 Do not operate for more than 5 minutes P The operation method is the same as How to operate using the connector to servicing the outdoor unit x1 The charging amount of 200g is equivalent to the load in
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24. ES We He 2 IPM ety lt INTELLIGENT een Ed POWER MODULE L 0 oi T lt SERVICE SWITCH 89 OUTDOOR UNIT Remove the compressor connector IPM INTELLIGENT POWER MODULE SELF DIAGNOSIS LAMPS 1777777777 pe gt Gea o 2 If your first attempt fails wait 3 minutes for the unit to re start and check the self diagnosis lamp status again Check outdoor electrical parts SERVICE SWITCH With the unit set in the operating Yes state press the start stop button Does the unit operate for approximately 2 seconds the LD303 coming on and then stop due to a failure of switching the lam
25. v lt Driver circuit internal IC gt 15V will not be generated when the internal IC has malfunctioned To find the malfunction either the power supply of power P W B or internal IC please follow the procedure following By connecting CN3 and CN4 Check the voltage between 15V and gt Internal IC is OK 15 0V on power P W B Normal 15V Lower than 15V By disconnecting CN3 and CN4 S Check the voltage between 4 15V gt Driver IC which may and 15 OV on power P W B malfunction Replace main P W B Normal 15V Replace P W B 15V Power P W B may malfunction Replace power P W B 21905 PROCEDURE FOR DISASSEMBLY AND REASSEMBLY INDOOR UNIT MODEL RAS 25JX5 RAS 35JX5 1 Front Panel Air Purifying Unit 2 Top Grill Front Cover 1 Hold both sides of the front panel and lift up 1 Lift up while pressing the top grill and remove from tab 3 places left center and right Front panel Remove from tab 2 When the front panel is fully opened with both hands push the right arm to the inside to release
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28. y gt Electric Expansion valve 6 35 LH B Strainer B Strainer Service valve 1 4 6 35 x m Single ended union 1 4 6 35 8 mi 6 35 DESCRIPTION OF MAIN CIRCUIT OPERATION MODEL RAS 25JX5 RAS 35JX5 1 Reset Circuit NORMAL HI RESET L 5 Microcomputer amp st La iD N TB LO T IC521 OV Fig 1 1 Power OFF I Power ON m Voltage ra I Voltage supply to pin of 12521 Reset release at 4 4V Reset enter at 4 2V Voltage Voltage at pin 5 0V of microcomputer Fig 1 2 The reset circuit initializes the microcomputer program when power is ON or OFF Low voltage at 7 resets the microcomputer and Hi activates the microcomputer When power ON 5V voltage rises and reaches 4 4V 1 of IC521 is set to Hi At this time the microcomputer starts operation When power OFF voltage drops and reaches 4 2V of IC521 is set to Low This will RESET the microcomputer AT 2 Receiver Circuit 12V 0141 R212 R141 20141 VDD HI C211 bd ov ov IRR O AW AW 43 RECEIVER R211 R611 cet FN
29. SGMNRP 0 1 The defrosting inhibit period is set as shown in the diagram below When defrosting has finished once the inhibit period is newly set based on the outdoor temperature when the compressor was started During this period the defrost signal is not accepted 2 If the difference between the room and outdoor temperature is large when defrosting is finished the maximum compressor speed WMAX or WMAX2 can be continued for 120 minutes maximum 3 The defrosting period is 20 minutes maximum 4 When operation is stopped during defrosting it is switched to auto refresh defrosting 5 Auto refresh defrosting cannot be engaged within 15 minutes after operation is started or defrosting is finished Setting Defrosting Inhibit Period DFTIM2 Time a ee DFTIM1 5 C 0 Notes 1 The time is set according to the outdoor temperature when it is between 0 C and 5 2 DFTIM1 is used when the outdoor temperature gt 0 C 3 DFTIM2 is used when the outdoor temperature lt 5 Heating Sleep Operation One More Timer I Room temperature 0 5hr thr Shr 3 5hr One more timer inhibited Set continuous operation One more timer monitoring Sleep button 5 Operation lamp Remote control Sleep Timer lamp Hi Med Indoor fan Silent Sleep Lo See
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37. rotation speed instructed by indoor microcomputer after defrost is completed About 35V Defrosting About 0 8V Dehumidifying Sensor dry About 0 8V 9 Electric expansion valve control circuit POWER P W B MAIN P W B 5V CN15 Ku B 12V B 12V 2R4032 R404 911 R401 00 l i Microcomputer PQ401 R293 4 5 H4 OH 39 Valve4 402 R294 ____ 3 HL LO 40 Valve3 Electric PQ403 R295 expansion 2 40 11 t 4 8 41 Valve2 valve Y PQ404 R2 1 e 96 42 Valve1 T Tema L OOW ce 1 B ov To drive the expansion valve use the 12 V output Use 4 phase coil and feed power to the Fig 9 1 phases 1 and 2 then switch over the filed poles to control the opening of the valve The reference between conducting phase switch over direction and the open close direction are shown in Table 9 1 When the power is turned on approx 0 9 V is applied to the CN15 and the pins CD to 4 and when no power is supplied 12 V is applied When the power is reset the expansion valve starts initial operation for 5 to 10 seconds During the initial operation measure each pin of the CN15 1 to 4 with a multimeter If no change is found around 0 9 V or 12V in this step the expansion
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50. 12 12 C EN PM IC121 z 4 8 5 arn 5 Is o 4 N gt E IC111 2 get 8 T 8 8 o GNG 5 _ ad 5 RED 3 5 B ak s 25 5 5 is Naa TS Fo 1 of Capacitor Terminal Board 5 ATE 5 5 pes Film Capacitor Power Cord gt ov p 2 B 0n ULT _ Ceramic Capacitor rc or BLU CN3 GRNZYELL XA 3P Top D 3X errr Electrolytic Capacitor sm REE Power 2 Switch I 2 Maker series name 11 4 2 H and written right side of part table show the following Earth 1 0911 Screw 1911 Di Indicating P W B part I lr t O Gess Gas sensor P W B part o io T8 F 3 gt gt gt _ _ _ _ _ _ sje 9 15 3 3 Symbol of the parts list is follow P C gi T Ventilation Fan Motor 5 5 lt la con 8 Symbol Shape m 7 1 gt eo _ a A Axial 0 eis i Radial TH p 8 I H Manual 444 E CNB PH 5P Top Chip Field Mounting 1 0733 5 Other Field Mounting O S 8 g 27 R830 358 0821 R827 R821 a bea 1 0821 s E 5v SS 1 z 5V 5 Ventilation damper Motor 1 eo D Gas sensor P W B L CN9 I n s ZR 3P Top 5 BLU 5 CN4
51. 5 V 1 1 1 1 Sleep Lo TEION Outdoor fan Cooling defrost signal Horizontal Shut U air deflector Horizontal Facing down Med See basic operation See basic operation m gt Lo ss Compressor speed Silent Lo SDMAX or SDRPM Outdoorfan A Bae Ct Reversing valve Cooling on model Indoor fan Balance period 3min Notes 1 The sleep operation starts when the sleep button is pressed CMINHI 2 When the sleep button is set the indoor fan is set to sleep Lo 3 The indoor fan speed does not change even when the fan speed mode is changed 4 If sleep operation is canceled by the cancel button or sleep button all data is cleared Compressor speed Basic Heating Operation SFTDSW Heating set temperature remote control set temperature s Table 3 Compressor rpm Calculated compressor rpm Temperature difference with shift value 1450 1 66 C 1950 2 00 2450 min 2 330 2950 min 2 662 3450 3 00 Start Stop button Dashed period Fan speed set to Start auto Stop Thermo judgment Max 3 min Thermo OFF Thermo MER OFF Defrost signal Preheating released Preheating released Preheating judgmen
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58. Remote controller Room temperature thermistor Heat exchanger thermistor Inrush current Protection circuit RECTIFIER Outdoor DC fan motor HARMONICS IMPROVEMENT CIRCUIT IPM Rotor magnetic pole position detection circuit Overheat thermistor Defrost thermistor Outdoor temperature thermistor Microcomputer clock circuit Wireless receive ao UY circuit gt Buzzer circuit Filter gt Indicating lamp Operation Timer Self Clean Two Way Air Exchange E D lt gt 2 Auto sweep motor Q 8 qos e M Ventilation damper motor Two Way Air Exch wo Way Air Exchange gt 5 Selection switch 8 Ventilation fan motor Temporary switch gt gt Indoor Outdoor lt interface circuit Initial setting circuit gt gt DC fan moter drive lt circuit Reset circuit Indoor DC fan moter Indoor Outdoor interface circuit Outdoor microcomputer AX 8T11 DC35V Power circuit Re
59. T1 Low speed rotation T2 T2 High speed rotation Convert to analog voltage at the ventilation fan motor internal circuit When T2 When T1 OV Fig 8 2 Ventilation fan motor is 12V DC motor It operates by inputting DC12V power K 12V and ventilation fan PWM signal to CN11 pin and CN11 pin respectively and outputting ventilation abnormality detection signal from CN11 pin e K 12V is generated from DC DC converter of the ventilation fan motor circuit It is the power source exclusively for the ventilation fan motor and is independent from 12V of the power circuit for control e Ventilation fan PWM signal Microcomputer 40 pin is a command instruction to the ventilation fan motor This signal is converted into analog voltage inside the ventilation fan motor to operate it If width of PWM signal is made wider analog voltage becomes higher and the motor rotation speed becomes faster as shown in Fig 8 2 e When the motor is rotating normally the ventilation abnormality detection signal is Lo approximately OV In the event that the fan is locked or unable to rotate due to failure Hi ventilation abnormality detection signal approximately 5V is output Microcomputer 44 pin to show abnormality When the Microcomputer receives this signal it suspends ventilation fan PWM signal and outputs the same signal again after 30 seconds have elapsed If the abnormality continues and retry is repeated 5 times within 3 minutes since t
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66. 9 HWRAS D10EX 908 HWRAS 25YH4 912 FAN MOTOR SUPPORT EVAPORATOR ASSEMBLY UNION 2 HWRAS 25YH4 913 UNION 3 HWRAS D10EX 910 MOUNTING PLATE HWRAS 25YH4 915 THERMISTOR SUPPORT HWRAS D10EX 911 TERMINAL BOARD 2P HWRAS 25YH4 917 TERMINAL BOARD 2P HWRAS D10EX 912 POWER SUPPLY CORD HWRAS D10EX 913 THERMISTOR ASSEMBLY HWRAS D10EX 914 POWER SWITCH HWRAS D10EX2 901 HWRAS D14EX2 901 P W B MAIN HWRAS D10EX 916 P W B INDICATION HWRAS D10EX 917 CONNECTING CORD 3P HWRAS D10EX 918 CONNECTING CORD 9P HWRAS D10EX 919 VERTICAL AIR DEFLECTOR HWRAS D10EX 920 DRAIN PAN HWRAS D10EX 921 HORIZONTAL AIR DEFLECTOR HWRAS 25YH4 928 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 1 2 1 27 HWRAS D10EX 922 HWRAS 25YH4 930 DEFLECTOR SUPPORT AUTO SWEEP MOTOR DRAIN CAP HWRAS 25YH4 931 HEAT INSULATOR PIPE HWRAS D10EX2 902 DRAIN HOSE HWRAS D10EX 924 FRONT COVER ASSEMBLY HWRAS D10EX 926 COVER SWITCH HWRAS D10EX 927 FRONT PANEL HWRAS D10EX 928 AIR FILTER R HWRAS D10EX 929 AIR FILTER L HWRAS D10EX 930 COVER LOWER R HWRAS D10EX 931 COVER LOWER L HWRAS D10EX 932 REMOTE CONTROL ASSEMBLY HWRAS D10EX 933 SCREW ASSEMBLY HWRAS D10EX 934 COVER TERMINAL HWRAS D10EX 935 ELECTRIC COVER UPPER HWRAS D10EX 936
67. Input DB1 and C41 The 081 rectifies the input voltage and the C41 smoothes it for the control power supply If the units above have any failure the control power supply won t operate In such a case replace the power P W B lt Smoothed Voltage OV C001 to C003 C011 L101 and L102 They absorb electrical noise generated during Fig 2 4 operation of compressor and also absorb external noise entering from power line to protect electronic parts Be sure to connect the earth cable between the indoor unit and the outdoor unit Otherwise the noise filter circuit won t operate properly SA1 and 51 to VS3 These surge absorber and varistors absorb external power surge such as induced thunder Be sure to connect the earth cable between the indoor unit and the outdoor unit Otherwise the surge absorber and the varistors won t operate R002 and R007 The resistor R002 protects the rush current when the power is turned on while the resistor R007 protects the rush current when the compressor starts When the R002 has any failure the control power supply won t operate When the R007 has any failure and a strong rush current is generated the DB2 C021 or C022 may be damaged 56 3 Indoor Outdoor Interface Circuit The interface circuit superimposes an interface signal on the DC 35V line to perform communications between indoor and outdoor units This circuit consists of a transmitting circuit which superimpo
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69. The signal is converted to 0 15 V at inside the IPM and transmitted to the gate of the transistor IGBT in each phase to drive the IGBT When abnormal peak current was detected while the inverter is driving the IPM outputs the Fail signal immediately from the pin 9 and forces the lower arm transistor to shut off at the same time In this step the Q501 is turned on and the input signal of the upper arm is also shut off through the D501 and D502 so that all signals to the IGBT are shut off This signal is also distributed to microcomputer pin 47 as a Lo signal to stop the drive signal and blink the self diagnosis lamp as two time When the peak current is detected the IPM keeps the lower arm off for about 4ms and the drive signal into stand by state 3 minutes after this state the micro computer outputs the drive signal and restarts the operation E 120 gt lt 120 gt lt 120 gt lt 120 gt lt 120 v ut w U7 U w U 5V V ov wt U v Drive signal at point aM N ga S e 5 s E a SE ue pe c Ere UH er us E op qon 1 pr MUU Drive signal at point Fig 4 6 65 5 Power Circuit for P W B Fig 5 1 shows the power circuit for P W B AC220 230V 0
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71. 04 C 35V 12V 290 R6 oe R276 R207 10K 5 C M R607 5 h f C M 01ps c c M JUMPER LED VE 3 39 16 REM R226 tz i R208 5 1 18 Re08 6 65 1 c M C303 0 25 C C M efe zje RL4 z Y 0 C M a E lt E lt RL 2 jz O ov R209 10K TM R609 6 65K Ei C304 0 1 25 SYMBOL USE UN USE 8 SYMBOL MODEL 318 G 3 R244 R210 C IM R610 6 65 1 1 16 UN USE ALP M k 211 5 1719 R611 6 65 1 M a 25 2 wool 50301 RED mara R M W 2 28 R212 1K 5 d c R612 5 C M LD302 Fu RP IO e 5 3 R213 fh c M 613 o 470p 50 c c M Ale 10303 RDTWFInAW4 558 5 h71 M ALM C501 P IM juwoo4 USE 055 3 R214 hd CI 8615 360K 10 5 502 470p 50 C 05 USE IC 12 8213 R215 10K be R616 360K 0 5 2 A 03 470p 50 C C M JWO A P d db gt 5 6 5 ii C M A M C5 lywoos rating amp 8 DID d R21 M R617 360K 15 504 SYMBOL 5 8 R404 R403 8217 5 1 16 C 05 M L472 H P mi Hs 5V FOR R218 5 1 16 C M 701 v4 ale cs IC1 STR stm Y 7 vv 88 O TACHOMETER RIS 100 5 hid C M inl Te C506 122 ULN2003ANS 5 10 ons 5 M
72. 155120 A P vs2 55 R242 2K 5 M l vs3 450NR TERMINAL n SERVICE 5503 c C214 0 068 M H M 4 5 Sw R504 2K 5 5 0 1 25 C C D901 DINL40 7 Kas 27875 e NORMAL R195 390 Z c M REOS 2K 5 c M 0 0047 50 C C M D902 DINL40 HIM SAT RACIO2M S 8 51919 8 1 x R196 390 5 1 16 C M REDE 2K 5 c M m 22 0903 DINL40 a 24 oo d di 197 390 5 c M e 0 1 5 SWITCH T OO 10 p R198 390 5 ue M R513 C M EAD 22 Beit M C201 n 255 0 5 1 16 1 c M M L s H 1515 DAC 3 8 s R514 5 1 5 C220 0 1 ps c c M D912 M SYMBOL MODE 8 8 o u CHOI 0 ue E SEE 5 ant FOR RET pels M Swi EVOPAEOZK 9 J 855 8 NORMAL OUTPUT MICON R201 10K IM R601 2K 5 0 02225 c c M D914 23 ANAY VALVE CN20 R202 10K 5 1 19 R602 2K 5 V C M 3 0 01 0915 M OSCILLATOR 8203 2k 5 c M EOS 2K pd c M SA 601 c c M m M _ 2K 5 c M 00 5 c M BOL MODEL s 8204 4 R604 100 5 225 0 01 50 SYM 5 c M 205 100 5 R605 100 5 6 0 1 25 C C C M C M C M C22 csrcvieMxJ as I R206 10K 5 06 100 5
73. Failure to do so may cause overcurrent to the fan motor and P W B s microcomputer IC and the like and a failure may occur To remove or insert the CN10 and CN11 be sure to shut off the power 84 THE SUPPORT FUNCTION OF FAILURE DIAGNOSIS Function Name Description Self diagnosis indication The timer lamp indicates the failure mode detected on the indoor unit side by function its blinking frequency while the filter lamp indicates the failure mode detected on the outdoor unit side by its frequency lt lndication on the indoor unit side gt A failure detected on the outdoor unit side will be indicated by the blinking filter lamp after retry operation has been performed several times For some failure modes only the retry operation is repeated without lamp indication lt Failure modes with repeated retry operation and without indoor unit lamp indication are as follows gt OH thermistor temperature rise Outdoor unit communication error Abnormal supply voltage Failure with low occurrence frequency lt lndication on the outdoor The LD301 indicates the failure mode detected on the outdoor unit side by its unit side gt blinking frequency Upon failure detection the outdoor unit will shut down and the LD301 continues to blink until the unit is restarted In the event of communication errors the LD301 continues to blink until communication is restored Self diagnosis memory Failure modes detected on
74. ONITIVLSNI 343 9NILO31102 15 uonoejoud 10 g 1noqe 10j dois y uonnq 10128968 24 sseid j anire ejeorpur JOU pue eu 198101d SI 141 pue jewod eui Gnjdun 10 uo pue jo uoiMs y uini g 1noqe 10 3 JOU IM 3 50045 400pino eui DUO 3993044 pue eu uo 3 doup eui yeyeay AYUIDIA eui U yyGljuns ul Buiwojjoj eui y Jou esf 40 ualdiund uiv te 43315 ONIYNG NI HS3H3 HIV OML OLIVIWOLOV amp aw gt dn M L NI HS3tH 4 9790 3135 4 He I SNIMS x G33dS 39NVHOX3 OML amp 330 39NVHOX3 AYM OML NO T IH 30193793 ANAS 13S H3WLL 9334 Nv4 INIL 4015 1413 1009 lt LYVLS 1 AdIqIWnH3G Q 139Nv9 dO1S SNId331S Q punoj Jo peoe dei seuemeq ay Jaye
75. R301 5 1 16 030 c R518 5 1 tew c R734 5 1 16w 030 c R826 1 108 033 C302 0 14 25V lew 045 C C821 0 01 50V F 061 Symbol mE Q803 2SC3441E 072 ICP1 CCP2E 20 0 8 103 C Sensor Unit 20131 RLZ6 8A 099 5 R302 5 1 1 030 C R519 59 i 16W 030 C 8735 3K 5 1 16 037 R827 3K 5 1 16 037 C303 25V 045 C C822 1000P 50 047 C lo 0821 2SC4738GRY 073 c ICP2 2 50_ 2 0 104 C Dave 20141 805 60 2 018 C H R303 12 7K t 1 16W 018 C R520 5 1 16w 030 8736 5 1 16w 030 R828 5 1 16w 030 c C304 25v 045 c C823 0 047 25V 056 C ICP3 CCP2E 30 12 105 Symbol Model prts 2 y 0 ZD911 RD6 2UJN2 101 R304 12K t 1 16W 018 C R521 5 1 16W 030 C R829 5 1K 354 18W 040 C C305 25V 045 C824 0 014 50V 055 C IRR RPM6938 029 H IH R305 TOS APE 1 16 8522 25 1 16W 030 C R751 2 7K 25 1 16w 034 C R830 1K 45 1 16W 033 C C306 ex 6 C825 ime ce 20921 TTTT T T T T T T T 1 2 3 4 5 6 7 8 9 190 10 11 12 13 14 15 16 29 MODEL RAC 25JX5 RAC 35JX5
76. Top 121 R118 75K 324 1 16 021 C R769 300 5 1 16W 032 C R918 33K 2 1 16W 020 C112 1000P_ 50V oi 047 506 0 lu 25V ew 045 C913 0 0474 25V 168 056 C D733 1SS355 095 C 1 711 ULN2003ANS 090 S CN7 XA 2P Top 126 S R119 6 8K_ 2 1 16w 022 C R401 390 5 1 16W 027 C R621 1K 45 033 C R919 3K_ 2 1 16w 019 C113 0 047 25V ty 056 C C507 25V EA 045 C C914 1000u 25 067 CN8 ZR 3P Top BLK 122 5 R402 390 5 1 16W 027 R631 1K 45 1 16W 033 C R803 120K 25 1 16W 031 R920 0 68 5 1 4W 007 C114 220 25V 2 066 C521 25V w 045 C915 2 0821 155355 095 C 1 801 2903 085 5 1501 1608 025 C CN8 PH 3P Side BLK 036 H J R121 0 56 5 008 C R403 5 1K 354 1 16w 040 C R641 5 1 16W 030 C R804 120K 5 1 16W 031 R921 0 68 5 1 4W 007 C C115 C522 0 22u 10V si 057 916 7 iA Se 0141 2SC2462LC 015 C H CN9 ZR 3P Top BLU 123 S R122 100 5 1 10W 042 C R404 5 1K 354 16W 040 C R805 120K 25 M 10W 031 C R922 100 5 1 16W 042 C C116 Eus eal 523 25V 045 C LED 0911 01756 092 10911 NJM2340M 082 5 CN9 PH 3P Side BLU 016 H R123 33K_ 5 1 16 043 C R651 1K 45 1 16W 033 C R806 120K 25 1 16W 031 R923 33K 5 1 16W 043 C121 25V
77. UNIT SUPPLY AIR amp EXHAUST HWRAS 25YH4 929 STEPPING MOTOR FOR DAMPER HWRAS D10EX 938 SCREW COVER FRONT COVER SCREWS HWRAS D10EX 939 47 HWRAS D10EX 940 1 115 1 COVER RIGHT COVER GAS SENSOR INDOOR UNIT PARTS NO RAS 25JX5 RAS 35JX5 lt 48 HWRAS D10EX 941 49 HWRAS D10EX 942 50 HWRAS D10EX 943 51 HWRAS D10EX 944 55 HWRAS D10EX 948 k 61 HWRAS D10EX 954 62 HWRAS D10EX 955 63 HWRAS D10EX 956 957 64 HWRAS D10EX 65 HWRAS D10EX 958 a 66 HWRAS D10EX 959 67 HWRAS D10EX 960 68 HWRAS D10EX 961 69 HWRAS D10EX 962 70 HWRAS D10EX 963 71 72 HWRAS D10EX HWRAS D10EX 964 965 P W B GAS CONNECTING CORD 3P ELECTRIC BOX ELECTRIC COVER LOWER COVER POWER SWITCH SUPPORT INDICATING P W B SUPPORT MAIN P W B SUPPORT POWER SWITCH COVER TEMPORARY SWITCH FILTER EXHAUST FILTER SUPPLY AIR CLEANING FILTER SUPPLY AIR PIPE SUPPORT REAR AIR DUCT 20mm AIR DUCT 25mm AIR DUCT JOINT AIR DUCT INSECT REPELLENT STRAINER SUPPLY AIR HOOD REPELLENT STRAINER ELBOW JOINT AIR DUCT C CASE HEAT INSULLATOR SHEET 220X 350X2 5t 116 OUTDOOR UNIT PARTS No RAC 25JX5 RAC 35JX5 HWRAC D10EX2 901 HWRAC 25YH4 902 HWRAC 25YH4 9
78. ZR 5P Top 7 0 5 ov 4 ay 2 2 eee eeo o o NU RA o sls Gy 578 i STO zi 94 3 _ GAS SENSOR CNO 3P Si 0v 55 593056303035 5 18 8 O Auto sweep motor 1 w SEN 5v Pa PIE ER ES E RA OV al Buzzer PH 4P Top 4 um 4 i R655 5 8 8 81 5 2 sl Fa ad 5 8 5 32 2 EIRIEIRIBISIBIBIBIBIBIBIEIBIHIE 38 CL Heat exchanger 05151 515 5121 51812 Thermistor Pla pere Ba 8 PS 1 R312 t gt 2 rest Eas AUTO RESTART rd um 1 R309 4 3 jave OUTSIDE rx 46 ib 4 Room temperature O 1 R308 1 Ap OUTSIDE xo 45 e qv Thermistor 1 1 C505 Ej VeNrILATIONDFECTION 44 R307 eye s VENTILATION FAN POWER SUPPLY 43 gt MM R306 1 7 reser evor CONTROL sic 42 4 15 C524 R510 ov CNG 22822322z Sra S ea klu IC501 e 7 11 NMI 22 0 re pe k bd ku ka E L T Ia VENTILATION FAN OUTPUT rr 40 RX o e e o o o zx E 10 ecock orn mon gt e OSCILLATION Terminal for EEPROM TX a ise entum spuma me E m gt 2 E FILTER 37 gt 12 A B data writing Tei wo gt B 44 at LTS gp WIRELESS PLT E erm rae pd I CNZ Indicating
79. aye eui pue ueuM esneo SIU eui 1snp Jl OY y JOU esneo siy eui 10 jaued y j 9910 esn Jou op jeued y 6 pue jo jeued y si uoy eui J NOI1nVO9 W syoljo jaued eu seoejd eui jo eui jeued luo1j y Jeueg 1u014 UMOP 9 0046 ay pue spueu uloq Juos eui Aq IIelsu pue ejpueu eui 1 11014 Burso 4 ul Ay 5914 Burgoeny s siou ul 5 eseo Buiss id deex pue 015 pue eseo ay jo ejpueu 5 4 Buno lloo 1sng Burzuopoeq T ploy se ld 9525 1sng Burzuopoaq aly 5 eui
80. 022 50 P 1 10302 100 5 1 16 C M 5 1 16 C M AC RIP R305 8234 8907 1 5 C803 0 01 C R306 R235 10K 5 1 18 C R908 30K 1 116 C M C804 001 25 8236 5 1 C M 510K 5 i C M 68 50 D P XOUTDOOR UNIT LD301 M R909 C805 TRIC ASSEMBLY P ST RTS R237 5 1 1 EET ELEC l 81315 h c M c 1 CN8 100 5 1 I o Tu i eee B100 110 XA 2P S 40 5 1 16 C M R C808 pas cln 4400K 150K WHT f R2 R913 M C809 0 01 255 8241 5 6K 5 R914 5 c ceto oora cR P DEF THERMISTOR 9 R242 1K 5 16 C M 8915 5 c i RO 5 9kQ 596 2 4 8243 6 98 1 1 1 FOIE 5 1 1 C M Sa 10025 DI R P 0 25 3400 2 BLK Sento 165 1 2 2K 5 1 16 c M c OUTDOOR TEMP 9 85858 R245 5 1 14 C M THERMISTOR _ 1K 1 1 16 C M R35 1 433kQ 296 RED uA 1 _ _ R246 16 B0 70 3400K 296 ov _ R247 1 5K 1 14 15 I _ _ _ _ K _ 2 13 12 11 _ T T u TIT T T L 10 10 9 6 7 8 5 4 3 2 1 31 BLOCK DIAGRAM MODEL RAS 25JX5 RAC 25JX5 RAS 35JX5 RAC 35JX5 Power source 1 50Hz 220 230V POWER INDOOR UNIT OUTDOOR UNIT POWER RELAY SWITCH
81. 7 76 5 26 7 80 1 24 24 0 75 2 27 3 81 1 INDICATION 32 7 90 9 34 7 94 5 32 Fan Motor Specifications MODEL RAS 25JX5 RAS 35JX5 32 0 89 6 35 3 95 5 RAC 25JX5 RAC 35JX5 POWER SOURCE DC 5V 35V DC 140 350V OUTPUT 25W 40W CONNECTION BLU BLUE GRY GRAY BLK BLACK YEL RED BLK WHT YEL BLU Control circuit built in YELLOW BRN ORN ORANGE GRN PNK PINK VIO MAIN ELECTRIC COMPONENTS FOR OUTDOOR UNIT BROWN WHT WHITE GREEN RED RED VIOLET NAME RATING APPLICABLE MODELS REVERSING VALVE COIL 135Q 20 C RAC 25JX5 RAC 35JX5 REACTOR L1 13 mH 0 2240 RAC 25JX5 RAC 35JX5 REACTOR L2 25 5 mH 0 370 RAC 25JX5 RAC 35JX5 FILM CAPACITOR 45 RAC 25JX5 RAC 35JX5 24 COMPRESSOR MOTOR Compressor Motor Specifications RAC 25JX5 RAC 35JX5 ITEM COMPRESSOR TYPE EU1011DF POWER SOURCE 220 350 V OUTPUT 800W WINDING RESISTANCE M 1 069 2 1 300 FRONT SIDE OF OUTDOOR UNIT ACAUTION When the refrigerating cycle has been operated for a long time with the capillary tubes clogged or crushed or with too little refrigerant check the color of the refrigerating machine oil inside the compressor If the color has been changed c
82. A 045 C C524 25V 045 D Switch L751 1608 jumper 025 C CNIO XA 6P Top 124 Ircuit s 5 Wawngs R124 100 257 1 6 042 C R441 55X 1 16W 012 C R652 100 45 l 16W 042 C R807 4 3K 354 1 16W 038 C R924 100 1 16W 042 C C122 100 10V 068 C Symbol Model 8 peii s Gack PA 4P Top 125 3 3 ircuit s rawings R125 30K 59 1 16W 029 C R442 100 354 1 16W 010 C R653 1K 45 1 16 033 C R810 680 5 1 16W 028 C C123 0 1 25V 045 C C601 0 1 25V 045 C Q521 RNI102 078 8 d s ES ES LD201 HLMF K305 a 025 Oscillator Symbol 5 R126 30K 5 1 16W 029 C R654 5 1 16W 030 R811 2K 50 1 16w 035 C C131 0 224 50V 046 C C611 1000P 50V jg 047 R127 5 1K_ 5 1 16W 040 C R501 1M 45 1 16W 041 C R655 5 1 16W 030 R812 39 5 1 8 013 C C132 0 1 25V i 045 C C621 Edu LD202 HLME KA08 026 HH oan Model Frequency swi EVOPOSK SW E m a c LD203 HLMF K505 027 H H Symbol parts No 5 SW2 5555919800 032 H R502 0 45 1 1600 025 C R656 IK 45 H 10W 033 R813 39 45 1 8w 013 C C631 1000P 50 047 C932 0 1 25V 045 C mum pm ee e LD204 a 025 H RES EFOSIO05ES 10MHz 107 C Zener Diode R141 2 7K 357
83. F Microcomputer I ov ov Fig 2 1 IRR light receiving unit receives the infrared signal from the wireless remote controller The receiver amplifie and shapes the signal and outputs it 3 Buzzer Circuit ja Microcomputer 1 711 Buzzer output 3 Fig 3 1 Buzzer circuit When the buzzer sounds an approx 3 9 2 square signal is output from buzzer output pin of the microcomputer After the amplitude of this signal has been set to 12Vp p by IC711 it is applied to the buzzer The piezoelectric element in the buzzer oscillates to generate the buzzer s LS EE On sound LEN lt s Sound wave A pr EE a e J Fig 3 2 Buzzer Operation Metal diaphragm Pizoelectric element 22227727 48 4 Snap Motor Circuit Horizontal Deflector Ventilation Damper 12V 1 CN5 s 0733 e iD Microcomputer 1 711 Ventilation motor 7 6 CN4 5 KD 4 3 I M 2 D a 1 D Stepping motor for auto sweep Fig 4 1 Fig 4 1 shows the Auto sweep motor drive circuit the signals shown in Fig 4 2 are output from pin 15 62 of microcomputer Micro computer pins Step width 10ms Horizontal air deflectors 1 2 3 4 5 6 7 8 9 1 60 2 amp 93 62 4 Fig 4 2 Microcomputer Output Signa
84. P R285 4 7K 2 C009 0 1 50 16 TLP421 HIP 1 820K 5 1 2 1K 2 6 c M p R P H46 AJP P0403 i R43 R286 5 1K 2 C010 100 10 004 1G P421 RE a2 B 0v 3 R44 27K 5 1 A P R287 1 8K 2 C M Coll 0 47 IS F H P 20404 Tai HIP gt M TR 845 220K 5X 2 Al P R288 51K 5 M 12 001 S C R P 020 RL4Z HIP EGJOT T wro o T R46 220K B 2 A P 8289 5 1 C M cui MARHE Aco NH m R47 470K 5 1 A P R290 5 C M an 0 01 5 c RIP D22 RN2Z HIP COILS INDUCTORS lt 8291 ok fs hi c M cois 0 01 lt 5 R20 ov 8292 2 1 15 c M 024 AG01Z ALE SYMBOL RATING 5 5 9 ele 390 5 71 c M 420 D H P R293 021 375 A P N 1 AN 2 202 R294 390 5 C M C022 375 420 D H P D30 155120 Z w EEE ATP p 1 8295 390 5 a C023 45 an F H 031 EGOIC A EU l R296 390 5 032 AGO1Z t z M 1 5v alts 8 R297 10K 5 1 0 0 01 C R M H R FU RA gum 22 5 5 D C100 L 1101 2mH 15A 252 1K 5 1 16 coy eT HTM 120 l pars Hh 0201 R297 i is 360K 05 A M R298 5 C101 US zu GM 0001 15 L102 2A RRMH3728 H eae ee 5 R 0 in z E a 5 360K 1341172 A M xc 102 C11 R05 812 9 8004 8300 I 110 3787 H P i
85. P W B Display _ _ _ _ F p Qi AA Tait 8 Sie aT ZR 9P Top 15 181 gt 5 TIMER rar 3 9 D 9 uS 2 zm S 5 IMAOP Frags 8 R765 10201 OPERATION I SWEEP1 VENTILATION DAMPER 2 E H ou g 5 5 5 5 5 5 5 5 2 2 ls 2 215 8 ga ES TES 0v V 5V 5V P E J 3 9 5V e e le le Ep g ile R767 10203 VENTILATION I rs 6 D s zin 7 b DES E E E t EI 2 E T E R768 BEET Test 6 5 _ 77 H Y o Oe 4 spa 0 B 2 5 8 220 5952 B R769 LD205 FILTER I IE E 6 sc 9 r 2 E RES 5V La Reed E o 7 P 5 3 D Loy 2 I IEA o R141 our Indicating P W B SW 8T 7 D Do E 0096 car 9m 9 e ii 7o cns 5V 3 TBTBTB swt ZR 3P Top f PROHIBITION S BLK 0096 ov 1 e o 1 TEMPORARY SW z EXHAUSTONLYD 3 e IS IC401 h ad CN2 E e a m i d sw2 PH 9P Side AIRSUPPLY VENTILATION CN8 _ x 2 u 2 _ E 2 2 d x 2 m e E E m E E m AND EXHAUST SELECT PH3P Side BLK Resistor Capacitor Transistor Diode IC Coil Connecter Circuit s Numerical 5 Power Drawings e Circuit
86. RAC 35JX5 COOLING DEHUMIDIFYING DEFROSTING 9 52 8 0 Silencer gg o Reversing valve COMPRESSOR OUTDOOR UNIT 9 52 Silencer Service valve 3 8 9 52 INDOOR UNIT Single ended union 3 8 69 52 Lf 9 52 9 52 y Electric Expansion valve 6 35 I Strainer iJ HEATING 9 52 8 0 Reversing Silencer o valve 4 B Strainer Service valve 1 4 6 35 lt Single ended union 1 2 6 35 6 35 OUTDOOR UNIT lt sei 9 52 Silencer 3 8 Service INDOOR UNIT Single ended union 9 52 3 8 9 52 Hh gt 2 BS ort 09 92 9 52
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88. Stop to operate and check the gas Checking the IPM main P W B pressure in balancing mode Error Gas leaking When the self diagnosis lamp lights in the same condition as above The compressor is defective Replace it Gas leaks and seal refrigerant Repair and seal refrigerant If the for inverter type air conditioner is available re check using it Perform a final check of operation 107 HOW USING THE SERVICE SWITCH THE OUTDOOR UNIT MODEL RAC 25JX5 RAC 35JX5 1 Turn off the power switch 2 Remove the electrical box cover 3 Turn on the power switch 4 After waiting for 30 seconds push the service switch for a second LD303 red will light and the unit will operate in the forced cooling mode at this time Never operate the unit for more than 5 minites Electrical box cover Cautions Unit top cover IPM INTELLIGENT POWER MODULE DC VOLTAGE CHECKPOINT LD301 DC VOLTAGE CHECKPOINT Gru QEA 8 B d a n LD302 LD303 f one ax of 4 nme mm 8 Q EL I Jm 7
89. T C302 R303 V oV Fig 7 1 The Over heat thermistor circuit detects the temperature at the surface of the compressor head the Defrost thermistor circuit detects the defrosting operation temperature A thermistor is a negative resistor element which has the characteristics that the higher lower the temperature the lower higher the resistance When the compressor is heated the resistance of the Over heat thermistor becomes low and voltage to a pin 62 of microcomputer is increased Microcomputer compares the voltage at pin with the internal set value if it is exceeded the set value microcomputer judges that the compressor is overheated and stops operation When frost forms on the outdoor heat exchanger the temperature at the exchanger drops abruptly Therefore the resistance of the Defrost thermistor becomes high and the voltage at pin of microcomputer drops If this voltage becomes lower than the set value stored inside the microcomputer starts defrosting control During defrosting operation the microcomputer transfers the defrosting condition command to the indoor microcomputer via the circuit interface The microcomputer always reads the outdoor temperature via a thermistor microcomputer pin 64 an transfers it to the indoor unit thus controlling the compressor rotation speed according to the value set at the EEPROM in the indoor unit and switching the operation status outdoor fan on off etc in the dehumidifying
90. Ultra redray test card Sensible area N Check functions again Within 2 cm If it does not work replace the remote controller The sensible area should flash in orange when you operate the remote control unit if it is good i07 a PRECAUTIONS SERVICING Be sure that the power switch is turned off or the power cable is disconnected before servicing Removing the P W B s System Configuration of Outdoor Unit Electrical Parts The outdoor unit electrical parts consist of two P W B s as shown in the figure lt Main P W B M board gt Contains a rectifier circuit and inverter module their controlling microcomputer and microcomputer peripheral control circuits The board incorporates high and low current sections lt Power P W B P board gt Contains a switching power circuit noise filter power factor improvement circuit etc The switching power circuit supplies power to electronic circuits on the Main P W B through CN3 When replacing any P W B disconnect all the cab les including ground wires A P W B 1 Remove four screws securing the Main 2 Open the support latches and raise P W B to the cooling fins and remove the the Main P W B in the direction of Main P W B from the cooling fins the arrow as shown in Fig A Direction of the P W B removal Power PW B 1 Open the support latches and raise the Open these support latches to power
91. basic operation See basic operation Outdoor fan Horizontal air Shut deflector Horizontal Facing down ERR Compressor speed Notes 1 The sleep operation starts when the sleep button is pressed 2 When the sleep button is set the maximum compressor speed is limited to WSZMAX and the indoor fan is set to Sleep Lo FWSOY 3 If operation mode is changed during sleep operation the operation is changed from the time the change was made and the sleep control starts 4 The indoor fan speed does not change even when the fan speed mode is changed 5 If defrosting is set during sleep operation defrosting is performed and the sleep operation is resumed when the defrosting is finished 6 When the operation is stopped while the sleep operation is being performed the set temperature at the time the operation is stopped is retained and the time count will be continued 7 When the set time is changed while the sleep operation is being performed all data including set temperature and time are cleared and the operation newly starts 8 If the sleep operation is cancelled by the cancel button or sleep button all data are cleared 9 There is no shift in the set temperature by elapse of time 10 One more timer operation is not performed in case of time setting reservation of 1 2 or 3 hours 45 REFRIGERATING CYCLE DIAGRAM MODEL RAS 25JX5 RAC 25JX5 RAS 35JX5
92. be replaced 80 TROUBLE SHOOTING RAC 25JX5 RAC 35JX5 PRECAUTIONS FOR CHECKING Indoor Controller Outdoor Controller Power Switch P Point I oTo NES d oe F 400uF M x2 WARNING const OV line 4 ront Remember that W B 10 Main voltage of 175 V is P W B applied to the 0V line Seem on the P W B or the CN like as shown in the right diagram Voltage at point A X x Q175V Ground voltage 8 amp J Point OV line Always keep your hands and metallic things away AN WARNING from the cabinet DANGER Don t install When using an the ground oscilloscope never line ground it Don t forget that high voltage as noted in the figure above may apply to the oscilloscope A 81 DISCHARGE PROCEDURE AND POWER SHUT OFF METHOD FOR POWER CIRCUIT Caution Voltage of about 350 V is charged between the terminal of smoothing capacitors 400pF x 2 During continuity check for each circuit part of the outdoor unit be sure to discharge the smoothing capacitors Discharge Procedure 1 Turn off the power of the indoor unit or pull out the power supply plug 2 After power is turned off wait for 10 minutes or more Then remove electrical parts cover and apply soldering iron of 3
93. because such failure may evade detection due to ambient temperature variations or other factors Blinks 1 time service switch instructions Can the unit be operated using the outdoor unit See the nameplate on the outdoor unit for operating No Check the outdoor electrical parts 91 V Check the indoor electrical parts CHECKING THE INDOOR UNIT ELECTRICAL PARTS 1 Power does not come on no operation No Is AC220 230V being generated between terminals A and B on the indoor unit terminal board Yes Is DC35V being generated between terminals C and D on the indoor unit terminal board Is the control voltage being generated normally 12V line 12V 5V line 5V Do the air deflectors perform initial operation when the power supply is turned on after off Is the microcomputer reset input pin Hi JL Yes Is the microcomputer clock signal 10MHz at pins 10 and 4 being generated normally LYes Is AC220 230V being generated at AC outlet Yes Check AC outlet and breaker and repair any defective part Check the power cable power Switch and terminal board and Is AC220 230V being generated between terminals A and B on the outdoor unit terminal board Is DC35V is being g
94. circuit use the self diagnosis function of communication circuit or self diagnosis memory function 3 Some failure modes are displayed only when reading the self diagnosis memory X2 4 Outdoor forced operation is not stored in the self diagnosis memory 5 Remote controller operation cannot be received while the timer lamp or filter lamp is blinking To check the operation one more time turn off the power and turn it on again Except for 1 88 SELF DIAGNOSIS LIGHTING MODE MODEL RAC 25JX5 RAC 35JX5 A N DANGER SELF DIAGNOSIS LIGHTING MODEM LIGHT ZA BLINKLI OFF 00350 DETAILS CHECK POINT CUT THE POWER SOURCE AND WAIT MORE THAN 10 1 DURING OPERATION 10303 RED LIGHTS MINUTES BEFORE NORMAL COMPRESSOR SERVICE WORK OPERATION OPERATION NOT MALFUNCTION CONFIRM THE DC snm IE O a 87 VOLTAGE AT THE t Za Zar hou NER MUST OE E Se OVERLOAD FHE poration 1S VERLOAD PROTECTION THAN 10V 2 AUTOMATICALLY CONT STATUS 2 OVERLOAD ROLLED TO PROTECT THE epo touen aen MALFUNCTION 5 WHEN OPERATING THE 2 DURING STO
95. dOLS 1HVLS 94 55 iens NITIS 5 3emb aio qaw IH 9334 4 sseid sexeorpui e dsip y yey os 10 09 9S 99 SseJd Jo pue y Joopur Y JO uonounj 14 es ue se esn ULI NOILVH3dO uone1edo A4IGINNHAG 10 1009 Buung eui jeoueo 315 uiv lt eui sseJg dojs dO1S 1HVIS sald eseoJoui 4 eui Jey eseo e s suonipuoo uonejedo y uo Bulpuedeq sejeredo A4IGINNHAG 10 1000 IV3H H3IdIH d HIV cis Burss id Aq su uonipuoo peeds eui Aq si y jo ueo LN31IS 40 MOT OIN 19443 se eq ues peeds eu UO uan eu uo NOI IVH3dO syes y ueu pue y seu sdeeq H3Id3IHr1d i Aq si
96. eu Hums eui un Joopui eu uo 94 pue punos au Aq Buljes y OWN 195 ay Buiuoe i ejeJedo ueis JOU y 395 sI JAW dee s eui eui Ji zz d s punos eui Jo eui s Buruonipuoo Jl suonipuoo eui 0 Buluonipuo2 y jo y uonippe uj jsneuxe pue ul useJj UBYM sn sk peedg ue p ds ue p ds ue peeds ue G3N peeds ue peedg uey y jnoqv 1sneuxa 1sneuxa ewes y jnoqv ul 5914 ul diy 5944 ul 45944 jo d L u uA y d d d d y ewes eui
97. eu uonnq 3 eui snoeuejnuis payesedo eq 1sneux pue ul usejj Buluonipuo2 ay e amp ueuox3 eui Aq eq jsneuxe pue usejj y Aq ysneyxe pue u l e1 dO eu ze eDed oj 1431 NOILVH3dO 39NVHOX3 HIV AVM LLL 01 p ds asard y 4 4 sy uoneJ do au 104 uoeoe IH u Ul 5215 uonejedo e 19501 eui WOO sy eui 104 jo o peeds y jes s peeds o1nv ueuw MOV dois eui 35944 syes uey uonnq
98. i 8005 1 96 R301 3 74K ji 28 z 0 R283 ii A P ox ix d c M lt ANZK c M EB02 HEZOBTLS 5 5 R006 mmm R302 3 c200 0 1 25 D201 p H3573 HIP m R007 100 596 10 R303 3 01K 1 C M C201 0 1 25 2202 DAP202K L803 RRMH3573 r HIP 12V i 240K 5 2 A P m 100 5 78 C M 9125 C C M 0204 2 C M L804 RR 0801 oe Pate ov 100 596 C M c c M a 7 M R305 204 0 047 50 5 AS Lek 1 7 c M L901 5 R101 306 100 5 0206 DAN cezo 8102 07 c M o1ps c c M D208 DAN20zK ed te R103 390 5 enr apr eiM 0501 CT RRME3484 3 0 C2 5 g qe s E ous RO SE N R401 100 5 A P 208 01g5 c c M p502 2 C M SURGE ABSORBERS ceos 8 O R105 4 7K c 403 h A P 209 0 0047 150 c T Ts epe wif i R35 5 M mE 1k PHA Al P 16446 2 seo ramno 5 5 t geo ov 8107 0 24 5 2 R M FEE 0125 C C M D702 Ip 3 C NR T I1 ms 18 M R501 2K 5 i716 C M ox eel 51 me ale gt pope 0008 C803 eo 8109 15K 1 16 R502 2K 5 C M 213 0 047 50 c c M 2801
99. indoor and outdoor unit sides are stored in the non volatile memory of the indoor unit These modes can be read later This memory is retained even if the power is turned off Data of the failure modes detected on the outdoor unit side is written in the memory every time a failure occurs so the failure mode can be checked on the indoor unit side without retry operation In addition minor failure modes which are not indicated by usual self diagnosis indication function are also stored in the memory and indicated These minor failure modes may not be stored in the memory in case of outdoor communication error The past 5 failure modes are stored in the memory There is a function to erase the memory Using the memory clear function failure symptom with low occurrence frequency can also be detected by reading and checking the failure modes in the memory every few days Self diagnosis of This is a function to perform self diagnosis of communication circuit to identify communication circuit the failure part on the communication circuit of the indoor and outdoor unit sides This function is used for detailed diagnosis in the event that any abnormality on communication circuit is suspected 85 Self Diagnosis Memory Function This function is to display the diagnosed failure modes stored in the non volatile memory of the indoor unit by remote controller operation This is effective to check the failure mode i
100. indoor microprocessor This modulated I F signal is then amplified and superimposed to DC 35V line via L801 and C802 of indoor interface circuit Fig 3 3 shows the waveforms at each component when data is transferred from outdoor microcomputer to indoor microcomputer The circuit operation of the outdoor receiving circuit is same as indoor receiving circuit 57 Fig 3 1 shows the interface circuit used for the indoor and outdoor microcomputers to communicate with each other CONTROL P W B I F RECEPTION Micro 35V Computer TERMINAL 2 BOARD gt o de C 3 e e K 2 0 I F TRANSMISSION OHO OV UNT 5 e Metal SAA Viti Maal DAS bh e e OUTDOOR UNIT POWER P W B MAIN W B 55 Micro Computer 8 0204 MV ar lt 1 VF TRANSMISSION 0801 4 3 son 1 F RECEPTION G I 1801 68 C807 9 e 0 fle RLI LS 10 B rn 4 LJ C8047 H UJ 418 TRYST L802 1 0206 D e gt 5 D C810R804C808 L803 C803 y D70V TERMINAL V BOARD Fig 3 1 58 5V Outdoor microcom
101. lV WW 009 C H R503 45 i 160W 030 C C651 0 1 25V 045 C C933 0732 _ RN1102 078 5 r 10205 _ 027 H H 7 R506 5 1 16W 030 C R701 1K 45 1 16W 033 R821 1K 45 1 10 033 R933 5 1 10W 030 C C211 47u 16V jw 021 H H C711 0 lu 25V 045 C C934 O 1 25V 045 C 0733 2SD1484K 081 Circuit s Model Drawings R507 5 1 108 030 c R721 3 3K 45 036 C R822 1 1 108 017 8934 1K 1 033 C212 lp 16V 85 049 C C935 25V 045 C Buzzer Symbol patso 5 R211 1k es 16w Ol H 8508 45 c R823 41 1 108 017 c R935 100 5 i 10W 042 C C213 Over Current Protecter Circuit s T Drawing s amp 20111 RD6 2UJN2 101 K R212 47 5 1 10w 008 C R509 25 1 16w 030 C R732 5 1 16w 030 C R824 8 25K 14 1 16 016 C C801 150 50 kcas 048 C Gas sensor Q801 RN1102 078 C Circuit s Mode Peting Drawing m Symbol amp 5 R510 45 030 C R733 5 1 16 030 C R825 1 017 C C301 25V 045 C C802 0 15 50 063 H CURT we Tum Q802 RN2102 080 C Symbol Current JpartsNo 25 821 __ 131 H 20121 PTZ20A 098 Arcuit s rawings
102. main unit to OFF 3 Set the operation mode to warming with the Function Selector button on the remote controller 4 Set the power switch on the main unit to ON 5 Set the temperature on the remote controller to 16 6 Press the START STOP button while pressing the Temperature button Remote controller transmits the signal 7 Failure mode is redisplayed after a long beep for 1 second is heard from the main unit Notes This function is effective only once immediately after the power is turned on If the remote controller is operated for another function this function does not work In addition note that this function may not work if procedures other than the above are performed If this function does not work turn off the power and retry it If nothing is in the memory the lamp does not blink even if the redisplay operation is performed After the redisplay operation or clearing of data the remote controller operation is not received by air conditioner Turn off the power before performing ordinary operation 86 TROUBLESHOOTING WHEN TIMER LAMP BLINKS MODEL RAS 25JX5 RAS 35JX5 Perform troubleshooting according to the number of times the indoor timer lamp SELF DIAGNOSIS LIGHTING MODE MODEL RAS 25JX5 RAS 35JX5 xd X2 X2 No Blinking of Timer lamp Reason for indication Possible cause Reversing valve defective 1 Reve
103. mode The following shows the typical values of outdoor temperature in relation to the voltage Table 7 1 Outdoor temperature C 10 0 10 20 30 40 R303 Voltage 1 19 1 69 2 23 2 75 3 22 3 62 lt Reference gt When the thermistor is open in open status or is disconnected microcomputer pins 62 are approx OV when the thermistor is shorted they are approx 5 V and LD301 blinks seven times However an error is detected only when the OH thermistor is shorted such a case the blinking mode is entered 12 minutes after the compressor starts operation 72 8 Reversing valve control circuit C 35V Power P W B MAIN P W B 1 1 1 Reversingvalve valve ERO A D701 a ears 120701 N 7 SP 4 Micro CN4B CN4A computer 1 lt lt DC voltmeter V or multimeter 1 Fig 8 1 Reversing valve control circuit will switch reversing ON OFF according to instruction from indoor microcomputer depending on the operation condition shows in Table 8 1 Voltage at Q701 between Collector and Emittor in each operation condition is approximately as shown in Table 8 1 when measured multimeter Table 8 1 Operation condition Collector voltage of Q701 Cooling General operation of cooling About 0 8V In normal heating operation About 35V Heating
104. normal operation 108 IPM Intelligent Power Module DIAGNOSIS SSM1001MA Circuit diagram of the device Collector A Emitter Circuit diagram of the module Terminals symbol mark of the module x See next page for measuring value using multimeter W I E 32 30 2826 1 29 Fail signal 31 29 27 25 2119 17 14 35 INVOV 36 0V 3T N 39 W 40 V 41 U 42 109 Diagnosis procedure IPM using multimeter Inverter section gt Set the multimeter function to resistance x 100 If the multimeter dose not have x 100 range please select its range from x 1 to x 100 The judgment shall be OK When the measurement was high resistance Please consider that the probe polarity will be reserve when use a digital mulimeter due to its battery connection inside lt note gt Sometimes it may misjudge as OK because of low conductivity when power module was damaged as disconnect mode In this case please check the resistance by reversing the probe polarity and consider OK when it was low resistance Also it is OK if the resistance was as same as the other phases U V W pntfitsatisgeec ctacite 00 j RA
105. s Numerical Power Drawngs Circuit s Numerical 5 Power Drawngs 2 Circuit s Numerical Power Drawings e Circuit s Numerical 5 Power Drawings Circuit s Numerical 2 Drawings e Circuit s Numerical Drawings Circuit s Numerical Drawings 2 Circuit s Model Drawings Circuit s Model Drawings Circuit s Model Drawings Circuit s Model Drawings Circuit s Numerical Rating Drawngs e Circuit s Model Drawings Symbol Value Q 8 E 25 Symbol 0 8 E 5 Symbol 0 5 E Ipart sNo amp Symbol Value 0 5 E W 5 Symbol Value 0 E E W IpartsNo Symbol Value F 2 2 Symbol Value F 2 E 2 Symbol Vale F 2 2 Symbol patsNo 5 Symbol 5 Symbol 5 Symbol No amp Symbol Value H Current Jpart sNo 5 Symbol cen parts 5 H R111 27K 394 1 10w 014 R306 1K 354 1 16w 033 C R551 1 45 1 16W 041 C R762 5 1 16W 030 C R911 27K 554 1 10w 014 C C101 0 22u 50V F 062 H C307 er te Q111 25518 076 0911 2SJ527S 071 Cc 0101 DSM3MA2 091 1C111 NJM2340M 082 S L101 82 1 9 112 H 116 R112 30K _ 5 1 16w 029 C R307 1K 45 033 R552 1K 45 1 16 033 C R763 5X 1 16W 030 C R912 30K 5 1 16W 029 C C102 390u 50V 065
106. sensor Gas sensor abnormal 1 Dirt sensor circuit 8 HiH 17 times Dirt sensor disconnection or short 2 Disconnection of dirt sensor circuit connector or lead wire Lights for 0 35 sec at interval of 0 35 sec rm Perform troubleshooting according to the number of times of the indoor filter lamp blink No Filter lamp blink mode Reason of indication Possible cause 1 HHE o 2times Peak current cut Reference the outdoor self diagnosis lamp blinks to perform the trobleshooting 2 3times Abnormal low speed rotation 3 4times Switching failure 4 BEBE Ee 5 times Overload lower limit cut x25 HH HEH 6 times OH thermistor temp rise e BE HHB 7 times Outdoor thermistor abnormal 7 BE 8 times Acceleration defective x 8 HH 9 times Communication error 02191 HH EEH 10 Abnormal power source 10 HEH HEB 12 Fan lock error 11 HEH B BM 13 Defective EEPROM of outdoor unit Lights for 0 35 sec interval of 0 35 sec lt CAUTION gt 1 If the indoor unit does not work at all check the connection error or disconnection of F cable 2 If the interface circuit is failed from the time the power is turned on failure indication by lamp blinking on the indoor unit cannot be made For diagnosis of interface
107. that at this time fan stops and the vapour may rise from the outside heat exchanger SPECIFICATIONS MODEL RAS 25JX5 RAS 35JX5 RAC 25JX5 RAC 35JX5 FAN MOTOR 25W DC35V 40W DC350V FAN MOTOR CAPACITOR NO NO FAN MOTOR PROTECTOR NO NO COMPRESSOR EU1011DF COMPRESSOR MOTOR CAPACITOR NO OVERLOAD PROTECTOR OVERHEAT PROTECTOR FUSE for MICROPROCESSOR POWER RELAY POWER SWITCH TEMPORARY SWITCH SERVICE SWITCH TRANSFORMER VARISTOR NOISE SUPPRESSOR THERMOSTAT REMOTE CONTROL SWITCH LIQUID CRYSTAL NO REFRIGERANT CHARGING UNIT 870g VOLUME Refrigerant 410A PIPES MAX 20m WITHOUT REFRIGERANT BECAUSE COUPLING IS FLARE TYPE jjnsoJ Aew suing anea pue edid ay HONOL LNOG unu 186 GS Joopino eui jo pue eoejins 5epno ay uonoj jou pyezeu yooys jenuejod dup Bursneo edid eui NOLSHOS syed onseld ued 10 ejqejrene e jueBe sejes 1no jjnsuo2 uo jeuuosied pezuouyne eq 1 Bujueojo yun 1oopul e pe eiuoe eq 1959 4 y pue
108. the wiring other wise the components may be damaged The failures of the loads are as follows Failed Possible causes Criterion output 35V Reversed connection of the cable Connect the cable correctly Electrical part for the indoor unit has Remove the connection cable and measure the a failure voltage If the voltage is correct check the electrical parts for the indoor unit Short circuited reversing valve Remove the CN2 and measure the voltage If the voltage is correct check the reversing valve 15V DC fan motor error Remove the CN24 and measure the voltage connect the CN3 If the voltage is correct check the DC fan motor Also check the main P W B 1A fuse for blow out in this step Main P W B error Remove the and CN4 and meaure the voltage If the voltage is correct check the main P W B 12V Main P W B error Remove the and CN4 and meaure the voltage If the voltage is correct check the main P W B 267 6 Microcpomputer s Peripheral Circuits 6 1 Overload control circuit OVL control circuit Overload control is to decrease the speed of the compressor and reduce the load when the load on the air conditioner increases to an overload state in order to protect the compressor electronic components and power breaker Overloads are judged by comparing the DC current level and set value Fig 6 1 shows the overload control system configuration and Fig 6 4 is a characteristic
109. voltage over 15 or below 10V Yes being generated on the 12V line Replace IC 111 Replace the microcomputer Check IC711 If it is normal replace the air deflector motor Perform final operation check 93 4 Check the control P W B power circuit Is 35V being output at pin Check to see if the connection cables are relative to 0V at pin 3 of disconnected or reversed CN3 If normal check the outdoor unit P W B Is 12V being output at Is ICP1 normal Normal if it is less than 10 Replace ICP1 Check if the air relative to OV at of C114 deflector motor is shorted and Blown open if it is 1Qor more IC111 Q111 C114 20121 are defective Yes If shorted defective ICP1 will be Normal open again Yes Open Replace the terminal board Insert the connection cable securely Has the terminal board thermal fuse blown open No Replace Q111 and IC111 Replace IC121 Check if a short occurs in the 5V line Is DC5V being generated If the 5V line is shorted ICP1 will be open again Yes Perform final operation check 94 5 Failure Phenomenon Ventilation fan motor does not operate lt Situa
110. 0 to 75 W for 15 seconds or more to TAB3 GRAY and TAB4 RED terminals on the main P W B as shown in the figure below in order to discharge voltage in smoothing capacitor Do not use a soldering iron with transformer Otherwise thermal fuse inside transformer will be blown LEAD WIRE SOLDERING IRON 30 TO 75W 82 STRUCTURE OF ANINDOOR UNIT ELECTRIC PARTS MODEL RAS 25JX5 RAS 35JX5 Screw for fix electrical parts Screw for fix wire of earth The lower projection of electrical p
111. 03 HWRAC 25YH4 904 HWRAC D10EX2 902 HWRAC D10EX2 903 HWRAC 25YH4 907 HWRAC D10EX2 904 HWRAC D10EX2 905 HWRAC E08H 907 HWRAC D10EX2 906 HWRAC E08H 908 HWRAC D10EX _ 908 HWRAC 25YH4 914 HWRAC 25YH4 915 HWRAC D10EX2 907 HWRAC 25YH4 917 HWRAC 25YH4 918 HWRAC 25YH4 919 HWRAC 25YH4 920 HWRAC D10EX 911 HWRAC 25YH4 922 HWRAC 25YH4 923 HWRAC 25YH4 924 HWRAC 25YH4 925 HWRAC 25YH4 926 HWRAC E08H 910 HWRAC 25YH4 928 HWRAC 25YH4 929 HWRAC D10EX 913 HWRAC 25YH4 931 HWRAC 25YH4 932 HWRAC 25YH4 933 HWRAC D10EX2 908 HWRAC E08H 911 HWRAC D10EX2 909 HWRAC 25YH4 937 HWRAC D10EX2 910 HWRAC D14EX2 901 HWRAC D10EX2 911 HWRAC 25YH4 940 HWRAC 25YH4 941 HWRAC 25YH4 942 HWRAC D10EX 917 HWRAC D10EX 918 HWRAC 25YH4 945 HWRAC 25YH4 946 HWRAC 25YH4 947 HWRAC 25YH4 948 HWRAC 25YH4 949 HWRAC 25YH4 950 HWRAC 25YH4 951 HWRAC E08H 914 2 1000W 9 7kg COMPRESSOR RUBBER PUSH NUT CONDENSER REVERSING VALVE SERVICE VALVE ASSEMBLY ELECTRIC EXPANSION VALVE SOUND PROOF COVER ASSEMBLY O L R COVER O H THERMISTOR SUPPORT CONNECTING CORD COMP THERMISTOR DEFROST THERMISTOR SUPPORT COIL REVERSING VALVE COIL ELECTRIC EXPANSION VALVE PARTITION REARCTOR COVER REACTOR1 REACTOR2 FAN MOTOR SUPPORT FAN MOTOR 40W 1 5kg PROPELLER FAN NUT PROPELLER FAN SIDE COVER L HANDLE FRONT COVER DISCHARGE GRILL ELECTRIC PARTS PLATE ELECTRIC PARTS COVER TERMINAL PLATE TERMINAL BO
112. 1 6 196 8 SUUg SUU00 9 4 DIH 5 euuoN jenos 60 Serial Communications Data 1 Outdoor message 000000 Fan 7 step request 1 Actual compressor rotation speed 5 MSB Actual compressor rotation speed 4 Actual compressor rotation spee Actual compressor rotation speed Actual compressor rotation speed 1 Actual compressor rotation L Compressor during operation Compressor during operation Outside temperature 7 MSB Outside temperature 6 Outside temperature 5 Outside temperature 4 Outside Outside temperature 2 Outside temperature temperature 3 1 Outside temperature 0 LSB Self diagnosis 3 MSB Self diagnosis 2 Self diagnosis 1 Self diagnosis 0 LSB Defrost request signal During forced operation Multi bit 1 01 O 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 011 011 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 Compressor minimum rotation speed 4 MSB Compressor minimum rotation speed 3 Compressor minimum rotation speed 1 Compressor minimum rotation speed 2 Compressor minimum rotation speed 0 LSB OVL up 15
113. 123 BA10339F EI 3P R220 1M 5 R705 7 5K _ 5 M2904M TE3 r1 z 9 R221 10K M R706 10K A P IC4 cns aksim a Yl Pos O x 510 5 1 16 165 IP TEST R222 ZENER DIOD H P 223 5 1 1 c M 39 5 4 A P 50 C C M IC6 M54532F M R287 5208 R2 8 M 100 5 C R801 C601_ 0 00068 127 S24C02BFJ TB S 1 Ls caji cnis R224 802 39 5 0 00068 50 SYMBOL 3 8 ELECTRIC p m P252 L N I aig T 8 6 9 H lt Y E R225 1K C M I 03 5 1 6 A P cu 00068 50 c c M HG EXPANSION 12V T 5 T amp H 4 J 6 R279 5 c M Rg P C603 0 CM 7001 c ol 4 60 R226 R804 C604 0 00068 50 C JT 6 8B A P 058008 HIP VALVE H oH V R227 5 1 18 c M 0 001 50 2002 MTZJT 6 PO V SELF W al euism nm n t Poss 0 8212 R228 5 i i c M ECT 5 hi c M He 0 001 50 clc M gt REG2 52012 _ E L R225 5 c M C M R229 _ 5 8902 0 001 50 c C M 8 30 5 1 1 c M 10 M C607 1 e i R2 M R903 C608 0 12 SSM1001MA 5v R231 5 208 C M 1 D 8 Cc M UDZS ics 72 mum 9232 chu R905 453 _0 15 0 R P 2007 R288 R304 I R233 10K 5 8906 100 16 1 16 0
114. 12V 5V R287 0208 gt 1 1s x 9 L 8 5 g Microcomputer cc 2 ov s6 RESET OUT E x s R252 204 e IC5 1 2 N N Gt cc V V OV OV R288 Fig 6 7 The reset circuit initializes the microcomputer program when Power is ON from OFF Low voltage at pin resets the microcomputer and HI activates the microcomputer Fig 6 7 shows the reset circuit and Fig 6 8 shows waveform at each point when power is turned on and off When power is turned on 12V line and 5V line voltages rise and 12V line voltage reaches 10 9V an reset voltage input to pin of microcomputer is set to Hi Reset voltage will be hold Hi until the 12V line voltage drops to 9 90V even though the power shuts down Power is ON Voltage V Power is OFF Voltage V 12 5V line Reset volage Time 12V line 5V line j Reset volage Time Fig 6 8 ra 7 Temperature Detection Circuit MAIN P W B 5V O H thermistor 1 CN8 R304 Z 2 62 C304 5 8301 DEF thermist Microcomputer mm i R305 63 DEF C303 5V R302 j Outdoor temperature ov thermistor CN10 V 1 oV R306 64 Outdoor N temperature
115. 20 A Compressor command Compressor command Compressor command Compressor command Compressor command Compressor command Compressor command Compressor command Compressor ON Reversing valve 2 way valve 2 MSB Fan 1 Fan O LSB Capacity code 3 MSB Capacity code 2 Capacity code 1 Capacity code 0 LSB Indoor in operation bit Operation mode 2 MSB Operation mode 1 Operation mode 0 LSB 1 0 1 0 11 01 00 0 O O 1 01 01 0 O 1 0 O O 1 0 1 0 10 1 0 10 1 0 170 1 0 110 1 01 0 1 0 1 0 1 0 1 0 1 0 1 0 Character Contents 61 2 Indoor message 2 Contents 4 IPM Intelligent Power Module Fig 4 1 shows the intelligent power module and its peripheral circuit The three transistors on the positive Eside are called the upper arm and the three transistors on the negative D side the lower arm DC VOLTAGE R004 R003 1d DETECTIVE RESISTOR R906 R905 14 DETECTIVE CIRCUIT ko e o o7 Io kon PS co r3 DOMI Imc hg C916 7007 69416940 15 0 0501 0502 9501 R513 R514 0v Q o Va IP limitter le jen lt Micro Computer Fig
116. 3dIN31 eu 18g 1N31IS MOT OLnV 19919 o 9334 J was 145716 suonipuoo uo Buipuedep jeuweulos Aew wood jenjoe ay pue 195944 eu alow MO _ eu W e jaa ow O s ing eujooeq eui se eoiuouo93 IH pue 55944 Cr YOIYM y JO 84 0 q3ads euL Q Guas eu seyeorput fe dsip uognq q33dS NV3 q33dS NYA eui S Jo Aq faesseoeu se eui ULI euin 1xeu dOLS LHVLS Sseid Ajuo y sy NI ejds p eui eu os 10198195 NOILONN 99 SseJd dois ey d q sues uonejedo 9015 1915 sseid 10
117. 4 1 Intelligent power module circuit U is ON is ON 62 Intelligent power module switches power supply current according to position of the compressor motor rotor The switching order is as shown in Fig 4 2 At point U is ON V is ON circuit in Fig 4 1 At point U is chopped OFF V is ON circuit in Fig 4 4 vt wt E on vt Upper arm Lower arm gt w Fig 4 2 Switching order of power module Upper arm transistor is controlled to ON OFF by 4 8kHz chopper signal Rotation speed of the compressor is proportional to duty ratio ON time ON time OFF time of this chopper signal Time T in Fig 4 2 shows the switching period and relation with rotation speed N of the compressor is shown by formula below 60 2 X 1 T Fig 4 3 shows voltage waveform at each point shown in Figs 4 1 and 4 4 First half of upper arm is chopper second half is ON and first half of lower arm is chopper second half is ON U transistor chopped U transistor ON Voltage at 280V 300V lt Chopping period Chopping period 208 sec Upper arm transistor Current at Fig 4 3 Voltage waveform at each point When power is supplied U V because of that Ut is chopped current flows as shown below 1 When transistor is U transistor U coil gt V coil transistor gt DC current detection resistor Point 8 F
118. 5JX5 RAS 35JX5
119. 85 4 98 4 76 HEATING KW 3 40 0 90 4 40 4 20 0 90 5 00 B T U h 11 600 3 070 15 010 14 330 3 070 17 060 790 750 91 750 91 DIMENSIONS 298 548 548 mm 210 288 47 288 47 WEIGHT 10 35 35 x After installation SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT ROOM AIR CONDITIONER INDOOR UNIT OUTDOOR UNIT JANUARY 2006 Hitachi Household Appliances Wuhu Co Ltd CAPACITY 10 11 SAFETY DURING REPAIR WORK In order to disassemble and repair the unit in question be sure to disconnect the power cord plug from the power outlet before starting the work If it is necessary to replace any parts they should be replaced with respective genuine parts for the unit and the replacement must be effected in correct manner according to the instructions in the Service Manual of the unit If the contacts of electrical parts are defective replace the electrical parts without trying to repair them After completion of repairs the initial state should be restored Lead wires should be connected and laid as in the initial state Modification of the unit by the user himself should absolutely be prohibited Tools and measuring instruments for use in repairs or inspection should be accurately calibrated in advance In installing the unit having been repaired be careful to prevent the occurrence of any accident su
120. AC 35JX5 1 Electrical parts 1 Remove the service value cover lock screws and lower the cover to remove it 2 Remove the top cover lock screw and raise the cover to remove it 3 Remove the front cover lock screw 4 Lower the right side of the front cover and pull it forward Then remove the cover from the hook 5 the right side of the front cover a little and pull up the left side to remove it from the hook 6 Remove each connector and earth cable from the lead wire 7 Remove four lock screws from the main P W B and pull two support hooks at the front side to remove the P W B 8 Pull three support hooks at the rear side of the Power P W B to remove the P W B i Support hooks um O99 P ur poe SE EE JE Power W B AA P W B LT Support hooks PARTS LIST AND DIAGRAM INDOOR UNIT gt ll TT aV MODEL RAS 25JX5 RAS 35JX5 EN gt Y Yj 2 O _ INDOORUNIT PARTS NO RAS 25JX5 RAS 35JX5 PARTS NAME HWRAS D10EX 901 CABINET HWRAS D10EX 902 UPPER COVER HWRAS D10EX 903 FAN MOTOR 25W 1 1KG HWRAS D10EX 904 GRILL TANGENTIAL AIR FLOW FAN HWRAS D10EX 905 FAN SUPPORT ASSEMBLY HWRAS D10EX 906 FAN COVER N O G N 1 1 1 1 HWWSI425 905 1 1 1 HWRAS D10EX 907 1 1
121. ARD 2P HEAT SINK REGURATOR1 P W B POWER FUSE 15A FUSE 3A VARISTOR P W B MAIN FUSE 1A SUPPORT P W B CAPACITOR 45 200V COVER OUT DOOR THERMISTOR THERMISTOR OUT DOOR TEMPERATURE SIDE COVER R TERMINAL COVER TOP COVER SERVICE VALVE COVER BUSH ASSEMBLY BUSH DRAIN PIPE COVER CAPACITOR CORD ASSEMBLY asm 0 118 HITACHI RAS 25JX5 254 5 AW NO 0013E RAS 35JX5 35 5 Printed in Japan TSK
122. BLK BLACK RED RED BRN BROWN WHT WHITE GRN GREEN YEL YELLOW WHIYELRED GRY GRAY PUR PURPLE CNI OUTDOOR W NS FAN MOTOR IPM A 1A FUSE C 083 DIODE STACK OVERHEAT THERMISTOR DBZ AY CNE KRED MAIN i DEFROST THERMISTOR E NM gd TABA TAB4TABI OUTDOOR TEMP eurok ary THERMISTOR 2 zd BI E f fn QUERN L CN3B CN4B OD STOUR X2 SMOOTHING CAPACITOR pr RELAY R007 POWER RELAY ELECTRIC EXPANSION VALVE tut 152 R002 6011 Cold 4 6015 cor cons 0003 00444 6008 C002 H n BI SUPPLY ne ES STACKS ac EVERSING VALVE FUSE 081 quy L REDI TTX m RED TERMINAL TERMINAL BOARD A B C BOARD A A GRN V EL BL _IWHI RED INDOOR INDOOR UNIT UNIT 27 ESSE DES 6778052 20 A EU JO jg 921052 ds 10 2 0 2 18402 dE GZL MS IMS _ usado 8402 Sr areoressss zms LS RE LS 8 B M
123. HITACHI RAS 25JX5 RAC 25JX5 SERVICE MANUAL RAS 35JX5 RAC 35JX5 TECHNICAL INFORMATION REFER TO THE FOUNDATION MANUAL FOR SERVICE PERSONNEL ONLY CONTENTS SPECIFICATIONS e 4 HOW TO USE 5 CONSTRUCTION AND DIMENSIONAL DIAGRAM 22 MAIN PARTS COMPONENT 24 WIRING DIAGRAM s m III 27 RAS 25JX5 28 WIRING DIAGRAM OF THE PRINTED WIRING BOARD E BLOCK DIAGRAM MH 33 BASIC MODE n 35 5 REFRIGERATING CYCLE DIAGRAM gt 46 TET DESCRIPTION OF MAIN CIRCUIT OPERATION 47 SERVICE CALL Q amp A e M ee 7T CO TROUBLE SHOOTING m I 81 PROCEDURE FOR DISASSEMBLY AND REASSEMBLY 111 PARTS LIST AND DIAGRAM gt 114 C9 RAC 35JX5 SPECIFICATIONS DC INVERTER WALL TYPE INDOOR UNIT OUTDOOR UNIT INDOOR UNIT OUTDOOR UNIT MODEL RAS 25JX5 RAC 25JX5 RAS 35JX5 RAC 35JX5 POWER SOURCE 1 PHASE 50Hz 220 230V 1 PHASE 50Hz 220 230V TOTAL INPUT W 580 155 1 160 990 155 1 380 TOTAL AMPERES A 3 11 2 97 4 74 4 54 KW 2 50 0 90 3 10 3 50 0 90 4 00 B T U h 8 530 3 070 10 580 11 940 3 070 13 650 TYPE COOLING CAPACITY TOTAL INPUT W 795 115 1 170 1 040 115 1 350 TOTAL AMPERES A 4 02 3
124. J 295 0 429u2 jjnsoJ Aew psezey xoous enjiej jun 10 pejoeuuoosip s u yee eu jj Kn5 1uos v EE ueaq seu sun y J 0 72942 Q33N NOA GINOHS 1N39V 58775 LOVLNOO HO ATHV3A H3H LI3 AH3A3 SLNIOd SNIMOTIOS 3H L393HO9 3SV31d NOILO3dSNI dV 1n 93H CONSTRUCTION DIMENSIONAL DIAGRAM MODEL RAS 25JX5 RAS 35JX5 INDOOR UNIT Unit mm 50 Service space 50 Top air suction grill Front panel 790 Mounting plate N 2 Q Q Te 47 Air outlet Horizontal air diflector Wireless remote ventilation hol controller entilation hole LL 200 390 200 7 Drain 5 When piping is wan drawn from the left side exchange the drain for the N T 2 gt 60 8 n _Drain hose tir Drain cap connection port Narrow pipe 6 35 About About 114 About 400 70 Wide pipe 9 52 L Power cord lt Connecting cable Vertical air deflector 22 MODEL RAC 25JX5 RAC 35JX5 OUTDOOR UNIT Unit mm
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128. P 10303 RED GOES OFF SERVICES SWITCH NORMAL STOPPED BY THERMOSTAT NOT MALFUNCTION STOP OR CONTROLLER SERVICEOPERATION n MICROPROCESSOR WAS ROCEDURE OF REFRIGERANT pump J 17 15 NORMAL P W B OWN OR INDEPENDENT OPERATION T STOP WHEN POWER SW HAS P W OF OUTDOOR UNIT 1 PEAK COMPRESSOR PEAK OMAIN P W B CUT OFF THE POWER SOURCE Z LII CURRENT CURRENT WAS BEYOND GPOWER P W B ONCE THEN ON AGAI 1 CUT MAXIMUM LIMIT GCOMPRESSOR tueur APRI beer eg v a RE AJOI Low SPEED ROTOR POSITION POWER P W WHICH 1S ON THE PWB MORE TES ROTATION OCOMPRESSOR SERVICE OPERATION WILL BE SWITCHING SP TTE Syne start OMAIN P W B STARTED FAILURE position pETEcTION P W B TO STOP THIS OPERATION press OPERATION FAILURE COMPRESSOR THE SERVICE SWITCH AGAIN MORE AIM OVERLOAD OVERLOAD PROTECTION 90070079 UNIT TS EXPOSED TO DIRECT N D Lower FUNCTION IS REQUESTING SUNLIGHT OR ITS AIRFLOW BLOCKED THAN 1 SECOND LOWER SPEED THAN MINIMUM GFAN MOTOROMAIN W B TO RESUME TO NORMAL OPERATION STIMES LIMIT CUT sPEED or COMPRESSOR eTHE VOLTAGE 15 EXTREMELY LOW CUT THE POWER SOUCE ONCE THEN M 0H THERNISTORICOMPRESSOR OVERHEAT eLEAK OF REFRIGERANT OCOMPRESSOR ON AGAIN RISE WAS DETECTED o0H THERMISTOR CIRCUIT IN ORDER TO PROTECT THE DAMAGE TIMES OH THERMISTOR MAIN P WB OF COMPRESSOR DO NOT OPERATE THERMI
129. P W B in the direction of the arrow as remove the power P W B shown in Fig A Direction of the power P W B removal Open these support latches to remove the Main P W B 98 C Power Factor Improvement capacitor Designed to improve power factor To replace the capacitor remove the power P W B and then 1 Remove two screws fastening the capacitor seat 2 Slide the capacitor seat in the direction of the arrow Sliding Direction 99 sisouDeip jjos y ees 6 noejep eq osje esn 018 OU esnj ve eui JI ON sed Aue eoe deu uono uuoo e qeo 1294105 JO J UMOJA YE eui MO eui S MO S Anoa pejoeuuoo so qeo pue o ees o1 Y29949 syed eAnoejep y SI s ddns Jamod MS 941 919 suopoedeo asny vg ZSA Ajurew eAnooJep osje sued 19410 yeu
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131. STOR ABNORMAL THERMISTOR OTHERMISTOROCONNECTION MORE THAN 5 MINUTES WITH IU ABNORMAL VALUE OPEN OR SHORT OF THERMISTOR DEFECTIVE SERVICE VALVE CLOSE TTIMES WAS DETECTED OTHERMISTOR CIRCUIT A I ACCELERATION COMPRESSOR WAS NOT D FAILURE ACCELERATED MORE OF REFRIGERANT 8TIME MINIMUM SPEED COMMUNICA COMMUNICATIONS BE WEEN GCABLE 15 WRONG CONNECTED ERRORIADOOR iur AND OUTDOOR 246 18 TIMES UNIT ARE INTERRUPTED UNIT AND OUTDOOR UNIT ABNORMAL ABNORMAL POWER SOURCE _ POWER WAS DETECTED OPOWER P W B OMAIN P W B SOURCE M FAN LOCK OUTDOOR FAN RPM IS OFAN MOTOR du ERROR NoT ROTATE AS INTENDED OFAN MOTOR CIRCUIT EEPROM MICROCOMPUTER CANNOT READ READ THE DATA IN EEPROL OMA IN P W B 13TINES ERROR OF TITULARES BLINKING 5 TIMES OF 0 25 SEC
132. TON i DETECTIVE CIRCUIT i CIRCUIT r x A I ve k O C PR x CONTROL CIRCUIT THERMISTOR ELECTRIC EXPANSION VALVE DETECTION CONTROL CIRCUIT CIRCUIT i EEE E EN a ENT el Fig 1 1 54 2 Power circuit This circuit is to convert the power from AC which is provided from the terminal A and B to DC voltage And produces an AC current which does not exceed the harmonic amplitude limit of the IEC61000 3 2 When the compressor is stopped the AC voltage becomes about 300 V and while the compressor operates it is about 280 V POWER PAW MAIN P W ees TERMINAL BOARD ASA FUSE L101 1 t GRAY 1 LA siue tos SA1 gt is aad al ES T ET 1801 ROOT RL2 Ls pal 2 gt I L2 23 E 1 sr 1 2 WHITEI RA TABO4 __ crt RED ener GREEN 1p ton TO MICROCOMPUTER i TABO1 m gt PURPLE m GREENS M fm ORANGE L003 1002 TABO2 081 N i L102 SWITCHING 6012 C007 C014 POWER SUPPLY Tl 6013 Fig 2 1 parts 1 DB2 The 082 rectifies the AC volt
133. age The possible causes for the DB2 failure are as follows The 15 A fuse may be blown out or the IPM for the main PW B may have a failure In such a case check the 15 A fuse for blowout and replace the main P W B if necessary 2 083 L1 C023 and L2 The DB3 L1 C023 and L2 shape waveform of the input current When the current runs through the L1 is taken for 1 and the current runs through the L2 is taken for 12 as shown in Fig 2 2 11 becomes an input current to the capacitor which peak value was crushed by the L1 and I2 becomes a resonance current which causes the LC resonance using the L2 and C023 By combining the 11 and 12 the input current from the main power shapes a waveform shown in the right side of Fig 2 3 indicating that the waveform is similar to sine wave The more the waveform is similar to the sine wave the lower the harmonic current becomes If the C023 has any failure the protection unit activates and the C023 in open mode In such a case replace the failed parts DB3 L1 ls AX 5 023 L2 is 2 Fig 2 2 Fig 2 3 55 3 C021 and C022 This smoothes the voltage rectified for operating the compressor When the input voltage is taken for the sine wave as shown in the top of Fig 2 4 itis rectified by the DB2 and becomes the waveform as shown in the middle of Fig 2 4 After that the voltage is smoothed by the C021 and C022 and becomes the waveform shown in the bottom of Fig 2 4
134. ally Weak Heating operation stops while the temperature is preset at 30 When Auto fan mode is set the indoor fan speed changes from HIGH through MED to LOW Fans speed is normally set to LOW during dehumidifying operation To have an operation with high dehumidifying effect the unit operates at low fan speed As a result cool air comes from the unit This phenomenon is not a fault It occurs during defrost ing Wait for 5 10 minutes until the condenser is defrosted At the beginning of heating the fan speed remains LOW for 30 seconds If HIGH is selected it Switches to LOW and again to MED after additional 30 seconds If temperature is high in the outdoor heating operation may stop to protect internal devices This is not an error The anti cool air function shows this phenomenon A rd In the fan Auto mode the unit detects the heat exchange temperature When the temperature becomes low the fan speed changes from HIGH through MED to LOW AUTO FRESH DEFROSTING After the ON OFF button is pressed Auto Fresh Defrosting is carried out the to stop heating the outdoor unit is system checks the outdoor heat exchanger still working with the OPERATION and defrosts it as necessary before stopping lamp lighting operation Fan speed does not change when fan speed selector is changed At this point fan speed is automatic during auto operation This is because Nice temperature reservatio
135. arts shall be sure to be hooked in cabinet When installing the parts use caution not to pinch any code between the Removing electrical parts part and cabinet 1 Removing elec cov u However be cautious as indicating P W B is attached to the cover 2 Remove the connectors of CN1 Thermistor CN4 Stepping motor for auto sweep CN5 Ventilation damper motor CN9 Gas sensor CN10 Indoor fan motor and CN11 Ventilation fan motor from control P W B 3 Remove the fixing screw for electric part 2 places and earth wire then remove the electric parts x In case the connector cannot be removed in the step2 above remove the securing screws for electric part cover S CN3 CN7 connecters and black and white wire of terminal A B and then remove the electric part cover Elec cov s Wire color of white Le 4 Indicating P W B Wire color of black m LLI CN4 03 to to Elec cov upper ejje e e e e i i lt CN1 Screw for fix elec cov s Elec cov Lower paw of alae eov uznal be hooked on the cutting portion of elec cov s WEG Sale 10 Then the elec cov u shall be inserted Switch w Indicating P W B at switch Pawls to fix P W B 2 places CN3 to fix P W B 5 places CN7 Indicating P W B at display panel l CN8
136. ation is being performed the set temperature at the time the operation is stopped 2 The indoor fan is operated in the Lo mode During thermo OFF indoor fan will be OFF for 5 is retained and the time count will be continued minutes and ON for 1 minute 5 When the set time is changed while the sleep operation is being performed all data including set temperature and time are cleared 3 When the operation is started by the themostat turning ON the start of the indoor fan is and the operation newly starts new delayed 32 seconds after the start of compressor operation E eme Sarp E PM all data are cleared 4 The compressor is operated forcedly for 3 minutes after operation is started a enored oniy A 5 The minimum ON time and OFF time of the compressor are 3 minutes 9 There is no shift in the set temperature by elapse of time 2 In case of continuous timer operation Deh u m i d ifyi ng Sleep Operati on Notes 1 After sleep operation reservation is made the operation is stopped in 3 hours time and then one more timer operation is repeated for subsequent 4 hours 7hr 2 After one more timer operation is stopped the one more timer operation is inhibited for 30 minutes ihr 1 Set to 7 hours Sleep button Cool i ng Defrost Operation lamp Timer lamp Remote control Sleep Indoor heat exchanger temperature Indoor fan Silent See basic operation
137. ature and the air conditioner unit is temporarily stopped Within about 3 minutes the fan starts rotation 2 When the unit operates at LOW air speed it continues to operate at the same speed When automatic operation is performed the preset temperature won t be indicated However you can adjust the temperature within a range of 3 by pressing the Room Temperature button If the temperature is 1 C higher than the auto preset temperature 4 1 C will appear If the temperature is 1 C lower than the auto preset temperature v 1 C will appear The heat exchanger temperature This is because the cool wind prevention function is operating and does not indicate a fault The indoor fan varies among high air flow low air flow and breeze in the auto fan speed is sensed in the auto speed mode When the temperature is low the fan speed varies among high air mode Heating operation Loud noise from the outdoor unit is heard when operation is started Noise from the outdoor unit occasionally changes There is a difference between the set temperature and room temperature Air does not flow immediately after operation is started flow low air flow and breeze When operation is started the compressor rotation speed goes to maximum to increase the heating or cooling capability so noise becomes slightly louder This does not indicate a fault The compressor rotation speed changes acc
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139. both DC Fan Motor and 1 Fuse together It will makes Fan Lock Stop when something has disturb the Fan rotation by inserting materials into propeller fan or ice has growing inside of outdoor unit by snowing It may make Fan Lock Stop by strong wind ex 17m sec or above against the Fan rotation In this case unit will be restart again after a while In case of Fan Lock Stop even though the DC Fan Motor is rotating correctly the possible cause in Fan Motor problem or control board problem Stop after the Fan motor runs 2 minutes Fan Motor may be broken lt Caution gt Please take care for the electrical shock by high voltage of DC Fan Motor power source which is common with compressor when you are servicing this unit You can not confirm the coil and wiring of Motor directly due to the built in control circuit in Fan Motor 76 SERVICE CALL Q amp A MODEL RAS 25JX5 RAC 25JX5 RAS 35JX5 RAC 35JX5 COOLING MODE The compressor has stopped suddenly during cooling operation Check if the indoor heat If the air conditioner operates exchanger is frosted in cooling mode when it is Wait for 3 4 minutes cold the evaporator may get until it is defrosted frosted Fan speed is not switched over during dehumidifying operation Cool air comes from the unit during dehumidifying operation The circulation stops occasionally during Heating mode When the fan speed is set at HIGH or MED the flow is actu
140. ch as electrical shock leak of current or bodily injury due to the drop of any part To check the insulation of the unit measure the insulation resistance between the power cord plug and grounding terminal of the unit The insulation resistance should be 1MQ or more as measured by a 500V DC megger The initial location of installation such as window floor or the other should be checked for being safe enough to support the repaired unit again If it is found not so strong and safe the unit should be installed at the initial location after reinforced or at a new location Any inflammable object must not be placed about the location of installation Check the grounding to see whether it is proper or not and if it is found improper connect the grounding terminal to the earth WORKING STANDARDS FOR PREVENTING BREAKAGE OF SEMICONDUCTORS 1 Scope The standards provide for items to be generally observed in carrying and handling semiconductors in relative manufactures during maintenance and handling thereof They apply the same to handling of abnormal goods such as rejected goods being returned 2 Object parts 1 Micro computer 2 Integrated circuits I C 3 Field effective transistor F E T 4 P C boards or the like to which the parts mentioned in 1 and 2 of this paragraph are equipped Items to be observed in handling 1 Use a conductive container for carrying and storing of parts Even rejecte
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142. d goods should be handled in the same way IC A conductive polyvinyl bag Conductive sponge Fig 1 Conductive container 2 When any part is handled uncovered in counting packing and the like the handling person must always use himself as a body earth Make yourself a body earth by passing one M ohm earth resistance through a ring or bracelet 3 Be careful not to touch the parts with your clothing when you hold a part even if a body earth is being taken 4 Be sure to place a part on a metal plate with grounding 5 Be careful not to fail to turn off power when you repair the printed circuit board At the same time try to repair the printed circuit board on a grounded metal plate Body earth Elimik conductive band lt Clip for connection with a grounding wire Fig 2 Body earth 6 Use three wire type soldering iron including a grounding wire Metal plate of Al stainless steel etc Bare copper wire for body earth Working table Resistor 1MQ 1 2W Staple ee Earth wirte Fig 3 Grounding of the working table soldering iron Grounding wire Screw stop at the screwed part using a rag plate Fig 4 Grounding a solder iron Use a high insulation mode 100V 10MQ or higher when ordinary iron is to be used 7 In checking circuits for maintenance inspection or some others be careful not to have the test probes of the measuring instrument sho
143. de 7 Automatic Two Way Air Exchange setting will be cancelled automatically after 14 days have elapsed since the setting is made Notes 1 When the sleep operation including 1 more timer operation is performed while the Fresh Air In During Sleep Mode is set the fresh air in operation is performed Fresh air in during sleep mode is inhibited while operating exclusive two way air exchange and heating 2 Forced fresh air in operation is performed for 30 minutes after sleep operation reservation is made 8 Judgment of the following fresh air in inhibiting conditions is made every 30 minutes after sleep operation reservation is made a Outdoor temperature Room temperature 1 b Room temperature Set temperature 2 C 4 Two way air exchange fan operates at the sleep tap 43 Reversing Valve Defrosting More than defrosting inhibiting period 15min and above Sie Auto fresh defrosting Fan speed Start Stop button setto Hi Defrost signal Preheating cancelled Preheating judgment Paaa Hii ww Med n Indoor fan Lo Silent Ultra Lo m Outdoor fan Hi or Lo Lo Operation lamp Reversing valve Cooling on model 30sec 2min 30sec Deceleration Reverse cycle period Reverse cycle period period 20min Max 20min Max ore Topal torai E
144. de OV oo Ventilation fan motor 112 Power circuit Ventilation fan motor 2 The CN3 power suppy and CN7 temperature fuse and CN10 fan motor and CN11 ventilation fan motor are the connectors with lock mechanism Press the lock with your fingers to unlock and remove the connector t Press here lt 7 Lock Unlock L 3 When checking the voltage and waveform do not connect the probes to the forbidden areas show below Touching them may cause the ICP1 and ICP3 blowout and Q111 and Q911 failure 35V line lt 2 0111 ICP1 lt 15 xim Oo Forbidd Gate G 0V i area Gate G ATS j Forbidden D O 0 R920 OK cos ROD 18 T8 b Forbidden Forbidden area Gate G 0V 0111 0911 is MOS FET and its gate terminal is a high impedance When a probe such as multimeter is contacted with the gate 0111 0911 have the continuous ON state to supply overcurrent the circuit causing the ICP1 and ICP3 blowout and Q111 and Q911 failure When checking the switching waveform of the Q111 and 0911 set the source to the base and measure the gate and drain 4 During power feeding to the P W B do not remove and insert the CN10 fan motor connector and CN11 Vertilation fan motor connector
145. diagram on overload judgement values There are two types of control which has named IS OVL and ID OVL IS OVL is limiting the whole input of this room air conditioner system through the current sensor CT1 in order to keep the maximum rating of components by reading total operating current ID OVL is watching and limits the compressor current through the detection resistor which is built in IPM in order to control the compressor reliability Since the compressor reliability is related with its speed the ID OVL value is also linked with the compressor speed Fig 6 2 shows an ID OVL limitation curve All of OVL operation values were programmed into EEPROM memory Compressor gq Microcomputer EEPROM Motor current ID v A D Detection converter resistor Y Y Motor Amplifier control process Smoother A D A converter Detection transformer CT1 Whole current IS Fig 6 1 Overload Control System 68 IPM Detection pec t j urreni INI Resistor lt Direct Current m i ___ Microcomputer 9 Vd CN4B p Daa ov 1208 D001 R005 D 15 6 Reset output 8 Reset Main P W B ov Fig 6 2 1 IS OVL The voltage amp circuit amplifies the DC current level detected by the detection transformer CT1 R
146. eceiving this the microcomputer converts it to a digital signal and compares it with the internal data to judge whether or not overload control is required Fig 6 3 shows the rotation speed control When the voltage at pin of the microcomputer exceeds the set value the microcomputer decreases the rotation speed of the compressor and reduces the load Voltage at microcomputer pin D Rotation speed of compressor Command rotation speed Actual rotation speed Decelerating Accelerating Decelerating Accelerating lt gt 4 gt gt Fig 6 3 2 ID OVL Fig 6 2 The filter consisting of R245 and C217 removes high harmonic frequencies from the voltage generated by the current flowing to Detection resistor R245 and C217 average the voltage This voltage is then input to IC4 pin 5 and supplied to microcomputer pin 60 The microcomputer compares this input with the set value and if the input exceeds the set value it enters overload control status The set Value is determined by the amplification of the voltage amp circuit Amplification high DC current low Amplification low DC current high Fig 6 4 shows the rotation speed control When the voltage at pin of the microcomputer exceeds the set value the microcomputer decreases the rotation speed of the compressor and reduces the load Judgment value according to rotation speed internal judgment value DC current Rotat
147. econds 90 Seconds DWNRATEW 80 80 DWNRATEC 80 80 SHIFTW 0 00 C 0 00 C SHIFTC 0 66 0 66 CLMXTP 30 00 30 00 C YNEOF 25 00 25 00 2 00 2 00 TEIOF 9 00 9 00 SFTDSW 1 00 1 00 C DFTIM1 43 Minutes 43 Minutes DFTIM2 60 Minutes 60 Minutes 36 Table 1 Thermo judgment Item Basic Cooling Operation CLMXTP ON temperature Thermo judgment OFF Outdoor Thermo judgment ON temperature Thermo judgment OFF Room Thermo judgment Room temperature Temperature for cooling and dehumiditying value set by remote control Table 2 Compressor rpm Temperature difference with shift value 2500 1 66 C 3000 min 2 00 C Calculated compressor rpm Cool dashed fg Fan speed set to auto Start Stop button Start Thermo judgment Thermo OFF Ultra Hi gt l 10Min Hi Indoor fan Meg Lo Silent Ultra Lo Air conditioner runs at the set fan speed other than when fan speed is set to Auto Operation lamp Max CMAX Rating CSTD Compressor rotation speed Reversing valve cooling on mode 2min 30sec __ 2min 30sec Notes Condition for entering into Cool Dashed mode When fan set to or Auto mode and temperature difference betw
148. een indoor temperature and set temperature has a corresponding compressor rpm calculated value in Table 2 larger than CMAX Cool Dashed will release when i a maximum 25 minutes is lapsed and ii room temperature is lower than set temperature 3 C thermo off and iii when room temperature has achieved setting temperature 1 then maximum Cool Dashed time will be revised to 20 minutes And iv indoor fan is set to Lo and Med fan mode and v change operation mode During Cool Dashed operation thermo off temperature is set temperature with shift value 3 After thermo off operation continue in Fuzzy control mode Compressor minimum ON time and OFF time is 3 minutes During normal cooling mode compressor maximum rpm CMAX will maintain for 60 minutes if indoor temperature is lower than CLMXTP No time constrain if indoor temperature is higher than CLMXTP When fan speed setting on remote control is Hi or Auto mode and both room and outdoor temperatures data based on out door unit meet temperature judgment Off shown in the table 1 the compressor rpm will be limited to CKYMAX_TY1 When fan is set to Med compressor rpm will be limited to CUKMAX When fan is set to Lo compressor rpm will be limited to CBEMAX When fan is set to Silent compressor rpm will be limited to CSZMAX During Cool Dashed when room temperature reaches set temperature 1 compressor rpm is actual rom x DWNRATEC 23075 Cooli
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150. enerated between terminals C and D on the outdoor unit terminal board Are and D connection cables reversed No repair any defective part Check the indoor outdoor unit connection cable and correct any defective section wrong connection incomplete insertion di Yes Connect the cables correctly Check the outdoor unit power circuit and repair any defective part Check according to the proper method Yes for checking the power circuit Check the wireless light receiving unit No Check the reset circuit and repair any defective section No Replace the microcomputer and oscillator Replace the control P W B gt edt Perform final operation check 2 62 2 Indoor fan does not operate others are normal Can the fan be stopped by remote control No Yes The microcomputer fan PWM Yes output at pin 4 is 1 5V No Replace the microcomputer Replace the fan motor Replace the microcomputer Perform final operation check 3 Air deflector does not move others are normal Are pulse signals output at No microcomputer pins 45 48 when auto swing is turned on in the fan mode Yes Is a
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152. ge apply to Vsp input Voltage range 1 7 to 7V Vsp high Faster Vsp low slower Vsp lower than 1 7V stop Motor will output FG pulse by following this motor revolution Outdoor microcomputer will output PWM control signal from 75 by following the instruction from indoor microcomputer This PWM control signal will convert to Vsp voltage by smoothing circuit R242 amp C209 Fan motor will start to rotate when Vsp was proceeding over than 1 7V and generate FG pulse by rotation speed FG pulse will feed back to Outdoor microcomputer 15 DC Fan Motor circuit has to match the Fan Motor revolution with instructed revolution Such as FG feedback Faster Instruction Slower Decrease pulse width FG feedback Slower Instruction Faster Increase pulse width FG pulse is also used for Fan Motor failure detection Microcomputer will monitor FG pulse 30 seconds after start the fan motor If there is no signal detected it will consider that the Fan Motor was malfunction and stop the operation In this case LD302 on control P W B will blink 12 times Fan Motor lock detected R107 and IC4 are used for Fan Motor over current 75 lt Reference gt When operation stop with LD301 blinks 12 times it be caused by faulty DC fan motor In this case please check CN6 and CN12 connection first makes Fan Motor Lock also if those connectors are in misconnection DC Fan Motor has broken invites 1A Fuse burned Please replace
153. he first abnormality detection abnormality is judged and two way air exchange lamp blinks lit for 4 seconds and off for 1 second 52 9 Dirt Sensor Gas Sensor Circuit lt Sensor Output characteristics gt gt lt Point Voltage gt 64 Sensor 8312 Input ham Lo Pp Dirt Sensor cc 95421 M Stability Time a Dirt Sensor to Dirty Air Return to Clean Air be turned on Fig 9 1 e The Dirt Sensor Gas Sensor works by making use of the change of resistance value which occurs with the gas sensing element heated by the heater depending upon the dirtiness of the air gas When the dirty air is detected the resistance value of the sensor changes to be lower e When electricity is turned on to the heater of the Dirt Sensor the sensor will be in a useable mode Due to the characteristics of the sensor it takes up to some several minutes before the temperature of the inner heater rises and the conditions of the gas sensing element become stable Time varies depending upon how the sensor is used e When the Dirt Sensor detects the dirtiness of the air the resistance value of the sensor changes and the voltage of the Dirt Sensor Input of the microcomputer IC501 becomes higher By this the microcomputer recognizes the air being dirty and by detecting the drop of the voltage it also recogni
154. ig 4 1 2 When Ut transistor is OFF by inductance of motor coil U coil V coil gt V transistor gt U diode gt Point Fig 4 4 63 DC VOLTAGE ctoo c110 E Id DETECTIVE RESISTOR Fig 4 4 Power module circuit U is OFF 15 ON Since current flows at point B only when Ut transistor and V transistor is ON the current waveform at point B becomes intermittent waveform as shown in Fig 4 3 Since current at point B is approximately proportional to the input current of the air conditioner input current is controlled by using DC current Id detection resistor Reference If power module is defected self diagnosis lamps on the MAIN P W B may indicate as shown below POWER P W B Table 4 1 Self diagnosis lam MAIN P W B Self diagnosis LD301 current cut 10301 2 10302 g i LD303 a 79 low speed LD301 Blinks 3 ri 9 rotation times P gr Switching incomplete LD301 Blinks 4 times Fig 4 5 IPM drive circuit The inverter driving device IGBT and the drive circuit are built in the IPM The IPM receives the signal from the microcomputer and convert it to 0 15 V signal to drive the IGBT When the unit operates at low speed a chopper signal is emitted from the micro computer as shown in Fig 4 6 0 to 5 V
155. ion speed Fig 6 4 69 R003 R004 R608 R613 detect the DC voltage at the power circuit The microcomputer receives a DC voltage and applies correction to the overload set value so the DC current will be low when the DC voltage is high Since the load level is indicated by the DC voltage multiplied by DC current R247 R248 and R249 are provided to perform the same overload judgement even when the voltage varies DC current 3 Start current control DC voltage DC current DC voltage DC voltage DC current Low High 260V High Low Rotation speed Fig 6 5 It is required to maintain the start current DC current constant to smooth the start of the DC motor of the compressor RAC 25JX5 and RAC 35JX5 use software to control the start current The start current varies when supply voltage varies This control method copes with variations in the voltages as follows 1 Turns the power module s Ut and V transistors so the current flows to the motor windings as shown in Fig 6 6 2 Varies the turn ON time of the Ut transistor according to the DC voltage level and the start is controlled so the start current is approx 10A P DC Voltage current fen Detection resistor Fig 6 6 70 6 2 Reset Circuit MAIN P W B
156. it and while closing the front panel slightly put it out forward 3 Remove the front panel pre filter air purifying unit top grill and exhaust pre filter Front panel 4 Remove the screw cover at the bottom of the front cover and remove the screw a Screw Screw Rear of Exhaust Screw cover Pre filter 5 Remove the center tab of the front cover 1 place 4 Remove the air purifying unit 2 pieces by pulling out while pushing up with both hands 6 Place your hands on both sides of the front cover and remove while pulling in the direction of the arrow Remove the air purifying unit ie 3 Indicating P W B at display panel 1 Remove the lead wire 2 2 Detach the claws for fixing the P W B and pull out the P W B towards you 4 Control P W B 1 Hold the both sides of the electrical parts cover and remove it by pulling out towards you 2 Remove each lead wire and earth wire lock screw from the control P W B 3 Remove the electrical parts lock screws 2 points 4 Pull out the electrical parts towards you 5 Detach the P W B lock claws 3 points and lift up the control P W B towards you from the right side to remove it Screw for fix wire of earth Screw for f
157. ix electrical parts Ground wire 5 Two way air exchange unit 1 Remove the lock screw on the top surface and remove the unit by rotating it downwards dim 6 Dew free assembly 1 Detach the claws 2 points fixed to the cabinet 2 Hold the both sides of the dew free assembly and remove it by pulling out its lower side and then rotating it upwards 7 Indicating P W B at switch 1 Remove the switch cover and lead wire CN8 2 Remove the right side of the P W B lock claw 8 Remove the board from the right side by lifting up towards you CN8 Switch P W B connected to control P W B 0 S a Wisa 8 Cross flow fan and fan motor 1 Remove the bearing cover lock screw on the left side of the evaporator 2 Pull the left side of the evaporator towards you while lifting it up and detach the claw on the lower side of the bearing cover 3 Remove the pipe cover on the right side of the evaporator 4 Remove the fan motor holder lock screw and detach the claw of the holder by pushing the lower side of the holder upwards 5 Loosen the fan lock screw and remove the fan 6 Remove the fan motor by rotating it towards you OUTDOOR UNIT MODEL RAC 25JX5 R
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159. led Fresh Air In During Sleep Mode Remote control 1 hour cooling sleep reservation Timer lamp Operation lamp Two way air exchange lamp Indoor fan Cooling sleep operation Horizontal air deflector Main unit operation 1 more monitoring Cooling 1 more operation more inhibited T Fresh air in operation Fresh air in judgment 5min fresh air in judging time Notes 1 Two way air exchange operation is performed automatically when dirty air is detected by setting Automatic Two Way Air Exchange 2 Exhaust operation is performed until the air becomes clean Forced operation is performed for 20 minutes The maximum exhaust period is 5 hours 3 If outdoor temperature S room temperature 10 C at the time the exhaust operation is finished fresh air in operation is performed for 20 minutes 4 If Air Monitor operation is performed while the air conditioner is stopped the air conditioner runs atthe fan operation mode while exhaust and fresh air in operations are performed 5 If Air Monitor operation is performed while the air conditioner is in operation the air conditioner runs according to the operation mode selected by the remote control while exhaust and fresh air in operations are performed At this time the operation lamp is lit 6 Automatic Two Way Air Exchange is inhibited for 8 hours after sleep operation reservation is ma
160. load Measuring points Potential failure modes spec 12V 11 13V MAIN P W B CN3 CN4 R701 12V display 8006 OV display The unit won t operate C21 12V display J27 J30 MAIN P W B error 5 4 5 6V MAIN P W B CN3 CN4 030 anode 5V display R006 OV display The unit won t operate J25 J27 J30 MAIN P W B error B 12V 11 16V Expansion valve R25 B 12V display R25 B OV display LD301 blinks 5 times Expansion valve error 15V 14 17V DC fan motor CN24 C06 side C06 side LD301 blinks 3 times MAIN PW B CN3 CN4 or 4 times or 12 times 35V 33 5 38V Indoor unit electrical parts D20 cathode 45 J17 Indoor unit won t operate Terminal C D C 35V display Terminal D red line Indoor Outdoor miss Reversing valve CN2 Terminal C blown line conection Check each voltage If each voltage meets the voltage specification above the power circuit is normal If any error is found after checking remove all loads and recheck each voltage If no error is found in this step the power circuit is normal Check the removed loads If any error is found in this step the power circuit has any failure Replace the power P W B x A short circuited load may cause an output error not only in the load but also in the others Be sure to check all outputs of the loads x Be sure to wait 15 minutes or more in order to discharge all the remaining voltage in the circuit to connect disconnect
161. ls As the microcomputer s outputs change as shown in Fig 4 2 the coils of the auto sweep motor is excite to turn the rotor Table 4 1 shows the rotation angle of Horizontal Air Deflector Ventilation Damper Table 4 1 Auto sweep Motor Rotation Rotation angle per step Time per step ms Horizontal air deflectors 0 0882 10 Ventilation Damper 49 5 Initial Setting Circuit 1 401 When power is supplied the microcomputer reads the data in IC401 E2PROM and sets the preheating activation value and the rating and maximum speed of the compressor etc to their initial values Data of self diagnosis mode is stored in IC401 data will not be erased even when power is turned off 5V 5V X X a 67 SCL External ROM 66 SDA IC401 E2PROM ov Fig 5 1 6 Power Supply 12V 102 THERMAL FUSE gay Built in 194 9 CN10 terminal board Ts Indoor Q111 E Motor ICP1 2 TE 3 r3 2E S 4e oye 121 i 3 b on Sl 2 10121 _ e Auc e M IN 5VEZLe Be 2 15 SEE J 2 gt 0 V FM ROTATION NO FB L Y DC FAN OUTPUT OV Micro Computer Fig 6 1 First 35V power which operates the indoor unit is gene
162. n function is operating This function starts operation earlier so the preset temperature is reached at the preset time Operation may start maximum 60 minutes before the preset time When on timer has been programmed operation starts before the preset time has been reached Does Nice temperature reservation It does not work It works only during cooling function operate during dehumidifying and heating This is because Nice temperature reservation function is operating The start time varies according to the load of room Since load varies greatly during heating the operation start time is corrected so it will vary each day Even if the same time is preset the operation start time varies Has the clock been set Timer cannot be set unless the clock has been set The current time display The current time disappears When the current time is disappears soon in approx 10 seconds The set the display flashes for time set display has priority approx 3 minutes The timer has been programmed Is the current time past the preset time but the preset time disappears When the preset time reaches the current time it disappears 78 When the Sleep timer is set during operation 1 The indoor fan won t rotate No air comes from the unit 2 The air speed won t change The preset temperature is not indicated on the remote control 1 The temperature arrives at the preset indoor temper
163. n the case where the power was turned off or operation was restarted without checking the lamp blinking frequency The past 5 failure modes are stored in the memory Failure modes with low occurrence frequency which are too minor to be indicated on the indoor unit are also stored in the memory This helps service personnel detect failure symptoms that cannot be checked during visit by clearing the memory and then checking the memory contents on a later day lt How to redisplay the diagnosed failure modes gt Fan speed setting for failure data 1 Set the power switch on the main unit to OFF 2 Set the remote controller display to the stop mode 3 Set the operation mode to cooling with the Function Selector Latest button on the remote controller 4 Set the power switch on the main unit to ON 2nd latest 5 Set the temperature on the remote controller to 32 3rd latest 6 Set the fan speed according to the failure information to be displayed Refer to the table on the right for fan speed setting for failure data SILENT 7 Press the START STOP button while pressing the Temperature AY button Remote controller transmits the signal 8 Failure mode is redisplayed after a short beep is heard from the main unit 4th latest lt How to clear failure diagnosis data gt 1 Perform the redisplay of the diagnosed failure mode Refer to the above procedures 2 Set the power switch on the
164. n the room temperature time and heat exchange temperature Set to stop if the room temperature is 18 C in the ultra Lo mode other than during preheating cooling is recovered at 18 33 C the room temperature Auto When the compressor is running at maximum speed In modes other than during hot dash or when recovered from defrosting left Temperature set for cooling 42 66 37 66 32 66 29 66 Sent exchange Compressor stopped P or eee t forcibly for 3 minutes fan pd 1 Runs at Hi until first thermo off after operation is started s 2 Runs at Lo when thermo is 8 off Hi Operates at Hi regardless of the Set to ultra Hi when the Set to ultra Lo Lo Med ultra Hi or stop depending on the room temperature and room temperature compressor runs at maximum time Set to stop if the room temperature is 18 in the ultra Lo mode other than during Lin speed and to Hi in other modes preheating cooling is recovered at 18 33 C Set to ultra Hi when the compressor is running at maximum speed during hot dash or when 9 recovered from defrosting o E if Med Operates at Med regardless of Same as at left Set to ultra Lo Lo Med or stop depending on the room temperature and time Set to stop if the room temperature is 18 C in the ultra Lo mode other
165. ng Sleep Operation Timer Dehumidifying Operation When time setting reservation is 1 2 or 3 hours Room temperature SFTMOR Setting Cooling preset temperaure 0 5hr 1hr 2hr One more timer inhibited i 1 30min ka 1 1 Set 10 2 hours One more timer monitoring 4 hours T T Start Stop button Operation lamp Remote control Sleep Thermostat judgement Timer lamp Hi 5 min OFF 1 min ON Indoor fan Indoor fan Med m m m m m Lo 15 sec Outdoor fan Silent Sleep Lo Reversing valve Cooling on model Sleep button 1 Operation lamp Horizontal air deflector Shut Horizontal Facing down STARCP rotation speed Compressor speed Compressor Notes 1 When the sleep button is set the maximum compressor speed is limited to CSZMAX and the indoor fan is set to Sleep Lo FCSOY 2 The indoor fan speed does not change even when the fan speed mode is changed Notes 3 If operation mode is changed during sleep operation all data including set temperature and time are cleared and the operation newly 1 The operation is done assuming as the preset temperature starts room temperature at the time 2 C 4 When the operation is stopped while the sleep oper
166. ng mode at start up is judged initial judgment Conditions for judgment any of the followings When auto operation is started after 1 hour has elapsed since the operation was stopped When auto operation is started after the previous manual mode operation When the operating mode is switched to auto while operating at manual mode b Judging method Room temperature 25 C 3 Cooling Room temperature lt 25 3 Heating 3 C is the fine adjustment value from the remote controller Room temperature Cooling Heating 16 27 Outdoor temperature Judging operating mode change during operation Continuous judgment a Conditions for judgment any of the followings The mode is reviewed at every interval time When auto operation is started again before 1 hour has elapsed since the operation was stopped b Judging method Judge by setting the hysteresis on the final preset temperature The final preset temperature is the actually targeted preset temperature which is the sum of the basic preset temperature and each type of shift value e g 3 C by remote controller preset temperature correction value powerful shift value etc Currently cooling Room temperature lt Final preset temperature Room temperature gt Final preset temperature Currently heating Room temperature Final preset temperature Room temperature lt Final preset tempera
167. ond Dirt sensor is not functioning Timer lamp blinks 17 times is not stored in the self diagnosis memory lt Assumed points of failure gt e Incomplete insertion of the connector of dirt sensor Gas sensor board e Dirt sensor lt Caution gt e Self diagnosis failure detection of dirt sensor is performed at the time when automatic two way air exchange is set lt Diagnosis flow gt Troubleshooting start Is the connector 9 of the dirt sensor board inserted 2 T Repair connector or wiring securely Is there wiring disconnection Yes Replace dirt sensor board 96 CHECKING THE REMOTE CONTROLLER Is battery polarity correct Install the battery in the correct polarity 17 Yes Yes Is the battery check sign flashing radio bring remote control switch within 15 of the radio and press Replace the battery the ON OFF button No m Check the LED D1 with D th ly oes the radio buzz noisily p Yes 29 Within 15 Check the indoor unit signal nl receiving If it is good check the main P W au MM OL Z So You can check the remote control switch by AM radio other methods as explained below Using the test card
168. onspicuously replace the compressor 25 WIRING DIAGRAM MODEL RAS 25JX5 RAC 25JX5 RAS 35JX5 RAC 35JX5 CAUTION The marked parts A are very important ones for safety OUTDOOR UNIT INDOOR UNIT SINGLE PHASE AC220 230V 5082 POWER TERMINAL CONNECTING SWITCH BOARD CORD BRN 4 3 S SLA BLU 2 1 1 BLK BLK WHT B WHT ae N RED THERMAL GRN amp YEL 675 LINE SUUS S RED FUSE 102 C 0 GRN amp YEL CORD s C ROOM TEMPERATURE RED D ____ THERMISTOR is TERMINAL BOARD BLK 1 SM AUTO SWEEP MOTOR EXCHANGER GRY CONTROL THERMISTOR PWB 3 GAS Z CN5 S0 VENTILATION DUMPER MOTOR SENSOR _ 3 INDICATING M 092 3 CN8 DD VENTILATION FAN MOTOR INDICATING 5 E iRECIEVER CN22 9 RED TEST CN10 INDOOR FAN MOTOR CN6 yet WIRELESS REMOTE CONTROL COMPRESSOR BLU BLUE ORANGE A
169. ording to the difference between the thermostat set temperature and room temperature This does not indicate a fault There may be a difference between the set temperature and room temperature because of construction of room air current etc Set the temperature at a comfortable for the space Preliminary operation is performed for one minute when the power switch on and heating or dehumidifying is set The operation lamp blinks during this time for heating This does not indicate a fault TWO AIR Up to what length the two way air exchange hose can be extended There is a restriction to the length of the two way air exchange hose maximum length is 3m Is there any limit to the number of bending of the two way air exchange hose If the hose length is 3m or shorter the hose be bent at 90 degrees up to 4 times Two Way Air Exchange Selection Swtich D Prohibit Two Way Air Exchange 2 Only Exhaust 9 Operate Two Way Air Exchange Refer to page 20 in Operation Manual What should do if do not want fresh air in operation or fresh air in amp exhaust operation e Operation at HI level 11 5W Operation at MED level 8 7W eOperation at LOW mode 8 5W What is the power consumption during two way air exchange operation Are there any conditions to prohibit two Exhaust Operation way air exchange operation When the temperature in
170. p blinking 4 times No 90 Check the drive circuit IMP using the PRD checker Check the position sensor circuit Normal Check the refrigerating cycle CHECKING THE INDOOR OUTDOOR UNIT ELECTRICALPARTS AND REFRIGERATING Is the indoor unit timer lamp blinking No nee Trouble shoot according to the self diagnosis lighting mode Run the unit using the following remote controller settings In the cooling season set the temperature to 16 C in the cooling mode In the heating season set the temperature to 32 C in the heating mode Does the operation lamp light or blink No gt Yes Open the indoor unit and check the voltage between pins Nos D and 3 of CN3 on the indoor unit control P W B Normal DC35V 32 38V Brown Red Is the voltage correct Is the compressor running Running Not running No Check if the connecting cable connected incorrectly inserted incompletely or disconnected Open the outdoor unit and observe the self diagnosis lamp LD301 Count how many times the lamp blinks Check the refrigerating cycle Blinks other than 1 time In the event of overload limit cut or OH thermistor temperature rise use the self diagnosis memory function
171. puter Pin VIVA OV Pin nere 5V OV Indoor microcomputer Pin 69 10 5V oV OV 100ms 33ms Leader 1 frame Fig 3 2 Voltages Waveforms of Indoor Outdoor Microcomputers Outdoor to Indoor Communications Outdoor microcomputer Pin L usss s s BP xe OV 5V Indoor microcomputer Pin 60 J J OV Pin t 5V OV 4 95ms 33ms Transmit receive 1 frame Switching time Fig 3 3 Voltages Waveforms of Indoor Outdoor Microcomputers Indoor to Outdoor Communications 59 v e 614 Ee SN x Q Nse ieee S pue SO y ueuM 2 0 oN 189 Q swo 19594 ueuM suig gg suig gg 0 sug e suig e suise y euin 5 L 1ooplno 2 0 4 19 001 xoudde 19591 ueuM 41001 suig gg 0 suig gg L sujg gg z ON 51195
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173. rated by the power source section of the outdoor unit and supplied to the indoor unit through the C and D lines of the connecting cable Second use the DC DC converter and the 35 V power supply from the outdoor unit to generate 12 V control power which drives the stepping motor during the operation In addition use the regulator IC 121 to generate 5 V power required for driving the micro computer and controlling fan motor If the terminal block was overheated due to a connecting cable improper connection the thermal fuse built in the terminal block will burnt to shut off the 12 V line and stop the operation of the indoor unit Then the outdoor unit cannot be communicated with the indoor unit and a communication error occurs the outdoor LD301 will blink 9 times stop all operations 50 7 Fan Motor Drive Circuit CN10 35V ov lt Micro computer i i fan O4 motor output R751 c751 Fan motor I9 DC fan motor Speed feedback R631 C631 Y oV 1 1 1 1 1 1 1 1 Voltage at point Waveform T1 Low speed T2 High speed Voltage at point amp Waveform T1 Voltage at point C Waveform 1 1 1 1 1 72 1 1 L 1 1 point A 15 7 kHz PWM pulse will be output from the 24 on the micro computer as shown in Fig 7 2 The pulse range will
174. re is lower than 2 C or indoor temperature is lower than 18 C During Hotkeep or Defrost mode indoor operation lamp will blink at interval of 2 seconds ON and 1 second light reducing When heating mode starts it will enter into Hotkeep mode if indoor heat exchanger temperature is lower than YNEOF 0 33 When fan is set to Lo compressor rpm will be limited to WBEMAX When fan is set to Med compressor rpm will be limited to WJKMAX When fan is set to Silent compressor rpm will be limited to WSZMAX In Ultra Lo fan mode if indoor temperature is lower than 18 C indoor fan will stop If indoor temperature is higher than 18 C 0 33 C fan will continue in Ultra Lo mode During Hotkeep or Defrost mode fan will continue in Ultra Lo mode 10 During Hot Dashed when room temperature reaches set temperature SFTDSW compressor rpm is actual x DWNRATEW 41 Automatic Two Way Exchange Two way air exchange lamp Operation lamp Indoor fan Operation mode set by remote control Horizontal air deflector Operation mode set by remote control Main unit operates Operation status of main unit Forced for 20mins Exhaust operation Fresh air in operation 0 after the exhaust operation is ished fresh air in operation starts ON Dirt sensor Dirt judgment Dirt criteria Dirt judgment cancelled Dirt judgment cancel
175. rsing valve defective 1 When the indoor heat exchanger 2 thermistor Mo 1 time temperature is too low in the SOME heating mode or it is too high in the only in the heating mode cooling mode Note The malfunction mode is entered the 3rd time this abnormal indication appears read every 3 minutes Outdoor unit is under forced Electrical parts in the outdoor unit 2 operation TH Vie XT I e 2 times When the outdoor unit is in forced operation or balancing operation after forced operation Indoor outdoor interface defective 1 Indoor interface circuit times when the interface signal from the 2 Outdoor interface circuit outdoor unit is interrupted Room thermistor or heat exchanger 1 Room thermistor thermistor is faulty 2 Heat exchanger thermistor 4 i i B 25225 9 times When room thermistor or heat exchanger thermistor is opened circuit or short circuit Over current detection at the DC fan 1 Indoor fan locked motor 2 Indoor fan motor 5 8 10 times when over current is detected at the 3 Indoor control P W B DC fan motor of the indoor unit IC401 data reading error IC401 abnormal 6 a EA 13 times When data read from IC401 is incorrect Ventilation fan abnormal 1 Ventilation fan locked 7 EE 16 times Ventilation fan motor does not rotate 2 ventilation fan motor 3 Indoor control P W B Dirt
176. rtcircuit a load circuit or the like CAUTION 1 In quiet operation or stopping the running slight flowing noise of refrigerant in the refrigerating cycle is heard occasionally but this noise is not abnormal for the operation 2 When it thunders near by it is recommend to stop the operation and to disconnect the power cord plug from the power outlet for safety 3 The room air conditioner does not start automatically after recovery of the electric power failure for prevent ing fuse blowing Re press START STOP button after 3 minutes from when unit stopped 4 If the room air conditioner is stopped by adjusting thermostat or missoperation and re start in moment there is occasion that the cooling and heating operation does not start for 3 minutes it is not abnormal and this is the result of the operation of IC delay circuit This IC delay circuit ensures that there is no danger of blowing fuse or damaging parts even if operation is restarted accidentally 5 This room air conditioner should not be used at the cooling operation when the outside temperature is below 10 14 F 6 This room air conditioner the reverse cycle should not be used when the outside temperature is below 15 5 F If the reverse cycle is used under this condition the outside heat exchanger is frosted and efficiency falls 7 When the outside heat exchanger is frosted the frost is melted by operating the hot gas system it is not trouble
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179. ses an interface signal transmit from the microcomputer on the DC 35V line and a circuit which detects the interface signal on the DC 35V line Communications are performed alternatively transmitting and receiving 3 1 Communication signal from outdoor microcomputer to indoor microcomputer At first outdoor microcomputer will send a request signal SDO to indoor microcomputer 38 KHz of carrier signal is generated and modulated by the request signal SDO from the outdoor microcomputer pin 17 This signal is superimposed to DC 35V line via C801 and L801 To prevent erroneous reception the outdoor microcomputer is designed so that it cannot receive a signal while it is outputting a request signal The receiving circuit in the indoor unit consists of a comparator and transistor The interface signal from the outdoor unit on the DC 35V line is supplied to C821 where DC components are eliminated and is then shaped by the comparator The shaped signal is detected by diode amplified by amp and output to pin 9 of the indoor microcomputer Fig 3 2 shows the waveforms at each component when data is transferred from the outdoor microcomputer to the indoor microcomputer 3 2 Communication signal from indoor microcomputer to outdoor microcomputer The request signal SDO generates by indoor microcomputer is output to pin 60 and amplifies by Q801 I F signal approx 38 kHz is generated by comparator then modulated by the signal from pin 60 of
180. set circuit Relay drive circuit Electric expansion valve Reversing valve control circuit 2334 DC compressor motor oy es Reversing valve coil BASIC MODEL RAS 25JX5 RAS 35JX5 Dehumidifying dehumidifying operation by the Air Purifier Cooling function select button only not including Heating auto that engaged by the dehumidify button Basic operation of start stop button Start Stop Start Stop Operation lamp Off timer Start stop button Reserve button ru E Cancel button Operation lami Timer lamp Timer memory p Off timer during stop Change in reserved time On timer Timer functions Srart stop button Reserve button Cancel button Operation lamp Timer lam Timer memor Change in reserved time On timer during operation Off gt On On Off timer Start stop button Reserve button Cancel button Operation lam Timer lam Timer memory 4 ON ON 4 OFF ON J OFF Off gt On timer On Off timer On gt Off timer Off gt On timer during operation during stop Changes from Hi to Med or Lo depending on room temperature Room temperature Set to ultra Lo Lo Med Hi ultra Hi or stop depending o
181. side the room is more than about 43 C the exhaust does not operate to protect the exhaust fan from damage When the above mentioned operation has stopped the Two Way Air Exchange lamp on the indoor unit indicators blinks lights for 10 seconds light off for 1 second Fresh Air In Operation When the air temperature outside the room is more than about 30 C or less than about 3 the fresh air in does not operate to prevent dew condensation on the two way air exchange fan and hose and to save energy If the difference in temperature between the inside and outside of the room is more than about 7 C the fresh air in does not operate to prevent dew condensation on the two way air exchange fan and hose while cooling operation If the difference in temperature between the inside and outside of the room is more than about 22 C the fresh air in does not operate to prevent dew condensation on the two way air exchange fan and hose while heating operation When the above mentioned operation have stopped the Two Way Air Exchange lamp on the indoor unit indicators blinks lights for 10 seconds light off for 1 second Replacement is not necessary for Pre Filter on the main unit and the Fresh Air In Pre Filter CD Deodorization Dust Collecting Fresh Air In Filter can be repeatedly used by washing it with water However this filter needs to be replaced approximately once every 3 years Do the filters need to
182. t Ultra Hi Hi Med Indoor fan L Control by heat exchanger temperature 4 Silent Control by Control by heat exchanger temperature heat exchanger temperature 10sec Control by E Control by heat exchanger temperature h CUM Ultra Lo Operarion amp gt Max WMAX2 Rating WSTD Wtd _ Wtd gt 3000 a 5 p a 2 5 o Min WMIN Outdoor fan Reversing valve Cooling mode Notes Condition for entering into Hot Dashed mode When fan set to Hi or Auto mode and i Indoor temperature is lower than 18 C and ii outdoor temperature is lower than 10 C and iii Temperature difference between indoor temperature and set temperature has a corresponding compressor rpm calculated value in Table 3 larger than WMAX Hot Dashed will release when i Room temperature has achieved the set temperature SFTDSW ii Thermo off During Hot Dashed operation thermo off temperature is set temperature with shift value 3 C After thermo off operation continue in Fuzzy control mode Compressor minimum ON time and OFF time is 3 minutes During normal heating mode compressor maximum rpm WMAX will maintain for 120 minutes if indoor temperature is higher than 18 C No time limit constrain if outdoor temperatu
183. than during preseating cooling is recovered at 18 33 C Set to ultra Lo Lo or stop depending on the room temperature and time Set to stop if the room temperature is 18 C in the ultra Lo mode other than during preseating cooling is recovered at 18 33 C The fan speed is controlled by the heat exchanger temperature the overload control is executed as in the following diagram the room temperature Lo Operates at Lo regardless of the Same as at left Set to Lo in modes other than when the room temperature compressor stops Silent Operates at Silent regardless of Same as at left Set to Silent in modes other than when the compressor stops Heat exchanger temperature KAFON KAFOF Med with overload Lo Basic operation of temperature controller Performs only fan operation at the set speed regardless of the room temperature button peration lamp See page 37 See page 39 See page 41 Operating mode is judged by room temperature and outdoor temperature 1 Judging by outdoor temperature Operating mode is judged by outdoor temperature Only when the mode is not resticted by this judgment the judgment by room temperature in the next paragraph will be performed a Outdoor temperature 27 C Restricted to cooling b Outdoor temperature lt 16 C Restricted to heating 2 Judging by room temperature Operati
184. tion gt Ventilation fan motor does not operate Two way air exchange lamp blinks lit for 4 seconds and off for 1 second Timer lamp blinks 16 times is not stored in the self diagnosis memory lt Assumed points of failure Mechanical lock of ventilation fan Coming off of the connector or wiring disconnection of ventilation fan motor Ventilation fan motor e Ventilation fan motor drive circuit lt Caution gt e If the two way air exchange switch is set to fresh air in operation inhibited or fresh air in and exhaust operation inhibited position operation of the ventilation fan motor is limited lt Diagnosis flow gt Troubleshooting start Is the connector CN11 of the ventilation fan motor Repair th t inserted securely Is there wiring disconnection AEQ MS Cone cior Or WINI Yes Does voltage of approximately 12V exist between and pin of the connector CN11 of the ventilation fan motor Replace control board Does voltage of approximately 5V PWM signal exist between 2 and pin Yes Yes Is there any factor to mechanically disturb rotation of the Remove the factor of mechanical lack ventilation fan No Replace Ventilation fan motor 95 6 Failure Phenomenon Two way air exchange lamp blinks lt Situation gt Two way air exchange lamp blinks lit for 4 seconds and off for 1 sec
185. ture 2 2 Change to heating 2 C Continue cooling 3 C Change to cooling 3 C Continue heating Cooling Heating final preset temperature Sleep operation with sleep button ON Enters sleep operation after set as on the left Action during sleep operation Lo sleep operation Same as at left See page 39 Same as at left See 39 e Same as left See page 45 Same as at left Performs the sleep operation of each operation mode 95 Mode data RAS 25JX5 RAS 35JX5 LABEL NAME VALUE WMAX 3800 min 1 4500 min 1 WMAX2 3800 min 1 4500 min 1 WSTD 3150 min 1 3900 min 1 WJKMAX 2800 min 1 3300 min 1 WBEMAX 2500 min 1 2800 min 1 WSZMAX 2500 1 2800 1 CMAX 3300 min 1 3800 min 1 2 3300 1 3800 min 1 CSTD 2050 min 1 3150 min 1 CJKMAX 1800 1 2200 min 1 CBEMAX 1600 min 1 1700 min 1 CSZMAX 1600 min 1 1700 min 1 CKYMAX TY1 2050 min 1 3000 min 1 CJKMAX TY1 1800 min 1 2200 min 1 CBEMAX TY1 1600 min 1 1700 min 1 CSZMAX TY1 1600 min 1 1700 min 1 SDMAX 1600 min 1 1700 min 1 SDRPM 1400 min 1 1400 min 1 WMIN 800 min 1 800 min 1 CMINHI 1400 min 1 1400 min 1 CMIN 1400 min 1 1400 min 1 DMIN 1400 min 1 1400 min 1 STARTMW 60 Seconds 60 Seconds STARTMC 90 Seconds 90 Seconds STARTMD 90 S
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187. valve or the micro computer has failure The logic waveform during the operating of the expansion valve is shown in Fig 9 2 Lead wire Table 9 1 Drive status 1 2 3 4 5 White ON ON OFF OFF OFF Yellow OFF ON ON ON OFF Orange OFF OFF OFF ON ON Blue OFF OFF OFF OFF OFF Operation mode 1 2 3 4 5 6 7 8 VALVE CLOSE 8 7 6 5 Pin 4 3 2 1 VALVE OPEN 200ms 10 Outdoor Fan Motor control circuit Motor coil RC Filter pM POWER P W MAIN P W B LLL EET 1A FUSE PE 6101 Vs ma 2 18 Giov m RIOT ON Sm OPWM control voltage pes pulse m I CN24 oa 00000 t RSEN Deu Control Board i 7 E DC fan motor with control board 5V t aT m HE 2082 dh lt Microcomputer 5V 2 r TT SFAN 1d T MEE o Pov d 3 FMCHOP ow R298 1 106 209 Dr SUCRE INPUT This model uses DC Fan Motor which has a controller circuit built in the Motor This DC Fan Motor will rotate by control volta
188. vary with different command speed The pulse is converted into the analog voltage by the R751 and C751 and applied to the fan motor as the speed 1400 command voltage Fig 7 3 shows the relation between the voltage at the point B and the speed Some differences will occur mino due to the condition of the unit The fan motor outputs the feedback pulse of the speed which is input into the pin 44 on the micro computer Voltage at point V This pulse is equivalent to a frequency of 12 60 speed Fig 7 3 Example 1000 1 x 12 60 200 Hz The micro computer monitors the frequency and adjusts the output pulse range of the 29 so as to keep the command speed fthe feedback pulse is 100 min or less due to a locked fan motor or failure the fan output will be stopped temporarily as fan lock error After 10 seconds restart the output of the pulse If fan lock error is detected twice within 30 minutes all units are stopped and the unit will come in the failure mode The timer lamp will blink 10 times Speed ME 8 Ventilation Fan Motor Circuit K 12V CN11 57 2 T 2 2 Lo 5V e 18 g 9 OV TO o 6 s VENTILATION 44 DIFECTION 8934 VENTILATION 40 FAN OUTPUT Y Fig 8 1 CN11 pin Voltage waveform OV L L T1 5
189. zes that the air has turned clean again e As the output voltage of the Dirt Sensor will change delicately even in the conditions of clean air depending upon temperature humidity and the flow of the air etc the detection of the dirtiness of the air is done by observing the change of the voltage per hour 53 MODEL RAC 25JX5 RAC 35JX5 1 The electrical parts for the outdoor unit is composed of two P W B a power P W B and main P W B and a harmonics improvement circuit as shown in Fig 1 1 MAIN P W B This P W B is equipped with the rectification diode DC fan motor control circuit and the circuits around the micro computer which take various controls POWER P W B This is equipped with the noise filter ICP power circuit interface circuit smoothing capacitor expansion valve control circuit and four way valve control circuit HARMONICS IMPROVEMENT CIRCUIT This circuit is composed of the capacitor at the bottom of the electrical parts box and two reactors attached to the BULKHEAD POWER P W B MAIN P W B IPM a 2 3 i 2 u o o 5 COMPRESSOR u n 2 o x f ANN A HARMONICS A IMPROVEMENT V SWITCHING Sa CIRCUIT mom POWER SUPPLY CONTROLCIRCUIT T A INTERFACE CIRCUIT i FAN MOTOR i POSSI

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