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SERVICE MANUAL - Hitachi Air Conditioning

Contents

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3. MOUNTING BOARD A AXIAL P POWER P W B R RADIAL M MAIN P W H MANUAL INSERT C CHIP SMT S OTHER SMT COMPRESSOR POWER P W MAIN P W B MOTOR CAPACITOR TYPE TERMINAL P EE oaaao IPM C CERAMIC BOARD 15A FUSE L101 1 WHITE F FILM amd OY 17 1 t RL DB3 D ELECTROLYTIC 5 g K ES SA1 F3 3007 21 5 1 1001 o tat 2 ole lo a e Bue 2 2 b t ollen RESISTORS RESISTORS gt e 8 o REATI 2 REATING Ele 5 Meri RED aN 1 1 801 1 5 5 P R248
4. 21 CAPACITORS CAPACITORS TRANSISTORS w ir zl 212 SYMBOL mar SYMBOL nar EE 56800 55 470p 50 C R P C900 2200p 50 cl C M 0101 2802412k C M 02 1050 D R P 1500p 50 c R P 3106 DTC114YSA RIP c04 470p 2K C R P cos 5601500 R P cotal 10 28 D C M coe 330 25 D R P C914 10 25 D C M 330 25 D R P C915 10 25 D C M 330 25 D RIP C916 0 1 25 C C M 0201 2802412k C M 11 0 1 50 R P 917 __10 25 0 0204 RN1402 0205 2862412 C M C919 0 01 80 C C M C21 9 C C920 0 125 C C M 0501 12862412 C M C23 470 D R P C921 M 0701 28C1214CTZ R P C24 470p 2K C R P 0922 M 0801 28C1214CTZ R P C923 M C81 0 C RIP C32 0 01 50 c R P C930 M RELAY C940 125 SYMBOL
5. Unit mm 23 208 335 Handle 26 750 65 275 288 195 4 Handle i 11141 2 sl 5 Air Suction grill N Air outlet 202 10 cr B 5 Rear side lt 17 Hie 1 22 Air suction m add 5 99 51 Holes for anchor bolt 2 012 x 6 slots for 08 0 bolt g 5 5 Notch for anchor bolt for 2 08 0 bolt Drain hole 12 Fixing hole 35 Drain hole 500 m 125 Service space Z Z v 255 rem al gt 2 16 MAIN PARTS THERMOSTAT Thermostat Specifications MODEL RAS 35FH6 THERMOSTAT MODEL IC OPERATION MODE COOL HEAT INDICATION 16 7 62 1 18 7 65 7 16 16 0 60 8 19 3 66 7 TEMPERATURE INDICATION 24 7 76 5 26 7 80 1 24 24 0 75 2 27 3 81 1 FAN MOTOR INDICATION 32 7 90 9 34 7 94 5 32 Fan Motor Specifications MODEL RAS 35FH6 32 0 89 6 62 1 60 8
6. XH3P Top CN8 e 5 12V CNiO XA 6P Top 1 Temperature fuse of terminal board 3 o o Ann SD o 6 102 Built in terminal board L101 ICP2 15 Indoor R121 Q111 5 Fan Motor 29 4 i I N D a 1 A aie ET M BLK R114 ass 9115 49113 es O ES hs ax Q112 0 0 Note a B ees G E 8115 ot E 1 1 Type of Capacitor 3 AT G cpu T KS tH lt 5 Z w BRN Te EST e Koos Capacitor z ls idi D lt 4 mI Vs 5 lt Capacitor O G a 5 RED 0 0 oe FS D XK Electrolytic Capacitor o T e PR Boar 1 0116 1 1 1 1 1 4 4 4 0 ioy 2 Symbol of the parts list is as follow Switch JA Da 4 5V CN4 PH 5P Top 1 Symbol Shape XA 3P Top BRN 3 2 Axial o gt Earth 22 082158 8630 9 M N Redes En ps Screw min er 1 S I Es 5 5 4 TE 5 5 V 5 u sweep mo or 1 a E3 ni BZ1 9 oe 009 9 9 48 9 9 9 9 5V 518 Buzzer STS 3522 lo lo 2801 Fs
7. 163 C3 p SOLDERING IRON 30 TO 75W STRUCTURE OF AN INDOOR UNIT ELECTRIC PARTS RAS 35FH6 MOS E E ELEC COVER H H N 822 N FIXTURE SCREW 2 Le N C FIXTURE SCREW Removing electrical parts When installing the parts use 1 Remove the electrical parts cover caution not to pinch any code 2 Remove the connectors from the CN1 heat exchange thermistor CN4 stepping motor and CN10 fan motor 3 Remove two lock screws 4 Remove the electrical parts in the direction of arrow between the part and cabinet CN2 P W B SUPPORTER P W B SUPPORTER P W B SUPPORTER P W B SUPPORTER INDICATING P W B HOLDER HOOK J INDICATING P W B Removing control P W B Removing the indicating P W B 1 Remove the connectors from the CN2 and 1 Remove the connector from the
8. a INO 022 91 OUTDOOR UNIT MODEL RAC 35YH6 92 OUTDOOR UNIT PARTS No NO RAC 35YH6 OTY PARTS NAME HWRAC E14H2 A01 1 8 55 COMPRESSOR 750W 8 0kg COMPRESSOR RUBBER PUSH NUT CONDENSER REVERSING VALVE SERVICE VALVE ASS Y ELECTRIC EXPAN VALVE 9 SOUND PROOF COVER ASS Y 10 O L R COVER 11 O H THERMI SUPPORT 12 CONNECTING CORD COMP 13 THERMISTOR DEFROST 14 HWRAC 25YH4A14 1 THERMISTOR SUPPORT 15 COIL REVERS VALVE 16 COIL EXPAN VALVE 17 PARTITION 18 REARCTOR COVER 19 REACTOR1 20 REACTOR 21 FAN MOTOR SUPPORT 22 FAN MOTOR 40W 1 5kg 23 PROPELLER FAN 24 NUT PROPELLER FAN 25 SIDE COVER L 26 HANDLE 27 FRONT COVER 28 DISCHARGE GRILL 29 ELECTRIC PARTS PLATE 30 ELECTRIC PARTS COVER 31 TERMINAL PLATE 32 TERMINAL BOARD 2P 33 HEAT SINK REGURATOR1 34 P W B POWER 35 FUSE 15A 36 FUSE 3A 37 VARISTOR 38 P W B MAIN 39 FUSE 1A 40 SUPPORT P W B 41 CAPACITOR 45 H F 200V 42 COVER OUT DOOR THERMISTOR 43 THERMISTOR OUT DOOR TEMP 44 SIDE COVER R 45 25 A45 1 TERMINAL COVER 46 HWRAC 25YH4446 1 TOP COVER 47 SERVICE VALVE COVER 48 BUSH ASS Y 49 BUSH 50 DRAIN PIPE 5
9. DC Voltage N Detection resistor Fig 6 6 _ 51 6 2 Reset Circuit MAIN P W B HPV 5V R287 D208 x A do 8 2 Microcomputer amp U e x 56 RESET OUT 1 33 R252 O q A 8 RESET C204 D IC5 1 2 N N or cc V V V V 0V OV OV OV R288 Fig 6 7 The reset circuit initializes the microcomputer program when Power is ON from OFF Low voltage at pin 8 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 48 of microcomputer is set to Hi Reset voltage will be hold 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 A N 12V line 5V line Reset voltage Time 12V line 5V line Reset voltage Time Fig 6 8 52 7 Temperature Detection Circuit MAIN P W B 5V O H t
10. Driver circuit internal IC 15V will not be generated when the intemal 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 CNA Check the voltage between 15V and gt Intemal IC is OK 15 0V on power P W B Normal 15v Lower than 15V By disconnecting CN3 and CN4 pM Check the voltage between 15V gt Driver IC Wnich isin IPM may and 15 0V on power P W B malfunction Replace main P W B Normal 15V Lower Replace P W B than 15V Power P W B may malfunction Replace power P W B 87 Procedure for Disassembly and Reassembly INDOOR UNIT RAS 35FH6 1 Front Panel 1 Pull up the washable panel by holding it at both lower sides with both hands 2 When the panel opens lull push the inner part of the right arm into the inside and pullthe panel forward while closing it gradually Fig 2 2 Front cover 1 After removing two screws pull the center of the front cover forward and release the claws 2 Hold the front cover at both lower sides and pull them forward to remove 3 Control P W B and Indicating P W B 1 Remove each connector from the lead wire 2 Remove the four P W B supports from the control P
11. A SN SN BIN J JA Check the drive With the unit set operating Yes circuit IPM using fails wait 3 minutes state press the start sto for the unit to re 4 the PRD checker start and check the Does the unit operate for Check the position self diagnosis lamp approximately 2 seconds the sensor circuit status again LD303 coming on and then stop due to a failure of switching the lamp blinking 4 times Normal No Check the refrigerating cycle Check outdoor electrical parts 68 CHECKING THE INDOOR OUTDOOR UNIT ELECTRICAL PARTS AND REFRIGERATING Yes TN Trouble shoot according to the Is the indoor unit timer lamp blinking gt self diagnosis lighting mode No Run the unit using the following remote controller settings Open the indoor unit and check the voltage In the cooling season set the temperature to 16 in the cooling No between pins
12. Sow SAUIJA 0641 82 HOW CHANGE THE SHIFT VALUE for SETTING TEMPERATURE The shift value for setting temperature of COOLING or HEATING operation can be changed with the remote controller This procedure should be done only by service personnel It is possible to reduce or increase in 3 degrees from the initial setting value SHIFTC and SHIFTW ref page 24 PROCEDURE 1 While pressing ON Timer button press RESET button at one time Stop pressing RESET button only and make sure that all marks on the LCD display are indicated then stop pressing the ON Timer button Enters Shift Value Change Mode 2 Press FUNCTION selector button to select FAN mode HITACHI RESET button FUNCTION selector ON Timer button PROCEDURE 1 PROCEDURE 2 3 Press the START STOP button The operation will be started 4 Select the following FAN speed to choose required operation mode to change C To change the shift value of COOLING operation select or MED Z of FAN speed To change the shift value of HEATING operation select LOW or SILENT of FAN speed Then Press the TEMPERATURE button to change the shift value The shift value is changed with a beep Please check the transmission sign and a beep HITACHI HITACHI HITACHI HITACHI HITACHI mr Reduce
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15. Voltage at point Waveform Fig 7 2 Forthe point A 15 7 kHz PWM pulse will be output from the pin on the micro computer as shown in Fig 7 2 The pulse range will 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 command voltage 1400 Fig 7 3 shows the relation between the voltage at the point and the speed Some differences will occur due to the condition of the unit The fan motor outputs the feedback pulse of the speed which is input into the pin on the micro computer This pulse is equivalent to a frequency of 12 60 speed Example 1000 min 1 x 12 60 200 Hz Fig 7 3 The micro computer monitors the frequency and adjusts the output pulse range of the pin 6 so as to keep the command speed Ifthe feedback pulse is 100 min 1 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 Voltage at point V 34 MODEL RAC 35YH6 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
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24. am ja O onnecter Circuit s Numerical 2L Power Inry 2 Circuit s Nunorical 2 Power raving s 2 Circuit 5 Circuit s Nunerical Z Power Dry s 2 Circuit s Praning 3 E Symbol Value P Symbol Value T Synbol 2 049 MEA Ircuit Model Deri Z TEE bangs hel E M puins 18081 ES 22d 11818 M nne 52 Ten RESI ale La C50 0 d TIE 050 c C911 157 069 Q801 DTC114EE TL OTB C nn K Symbol Val ue H Current part s bo Symbol Mo S S EU s 7 Jes IE R111 27K 5 i 10 O14 R401 390 5 1 10v 023 C R551 1 5 1 168 041 C 8803 120K 5X 1 16W 031 C C101 0 22 4 50V F 062 R 25085 P 357 closolc 59 42 o 14 25v c oso Q802 DTALI4EE TL o80 C D101 D M3MA2 091 c 10111 NJM2340M 082 C 1104 35 REPRISES SRT E en D 092 10121 BA50BCOT 083 H Ri12 30 1 5 029 R402 390 5 1 10v 023 c R552 1K 5 1 16W 033 C R804 120K 5 1 sv 039 C C102 330 507 095 R Dii1 DiP 6 C507 0 1u 25v 050 C913 1000 50 053 6 Q803 28C3441E 072 0 CN2 CZ i2P T 117 H R403 5 1K 5 lie 040 c R805 120K 5 1 16v 031 c cios 470p sso 052 D121 158355 0951 0 oP 508 0 1 25 050 282112505383 97316 D401 HN1D03FU 093 BR24L04F W i L111 560 0 6A 113 CN2 07 12P Side 123 H
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26. Reverse cycle period Reverse cycle period See basic operation Deceleration period 20min Max 3min Max in 20min Max lt lt Silent TDF431 TOFAI2 gt 0 41 TDF413 TDF421 1min Siento ZZ 422 Outdoor fan STARCPL STARCPL SGMNRP Horizontal air Shut deflector Notes Horizontal 1 The defrosting inhibit period is set as shown in the diagram below When defrosting has finished once the Facing down 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 23 minutes after operation is started or defrosting is finished Upper limit WBEMAX lt 7 7 To o 6 22 1 sleep operation starts when sleep button is pressed 2 When the sleep button is set the maximum compressor speed is limited to WBEMAX and the indoor fan is set to sleep Lo 3 The indoor fan speed does not change even when th
27. Control P W B 9 I F RECEPTION 0821 88521 Micro 35V Computer 5V TERMINAL 5 BOARD 3 si 3 50 1 F TRANSMISSION OO OUTDOOR UNIT POWER P MAI SV CN4B SAN 11P 5v Micro Computer 12 R802 0204 2804 I 1 TRANSMISSION 0801 hs E 10802 rop 4 0820 I F RECEPTION 1801 68 i guo p mL 0 48 Anto m 55 7 Lad 0804 He m D e 40 081088040808 101 0803 1804 0 07 TERMINAL BOARD TIT TIT Fig 3 1 39 5V Outdoor microcomputer 11 a M OV Pin 68 5 JAA 5V Indoor microcomputer Pin 59 C 50 0V qid 100ms 33ms Leader 1 frame Fig 3 2 Voltages Waveforms of Indoor Outdoor Microcomputers Outdoor to Indoor Communications Outdoor microcomputer Pin 11 0 Td MJ ES OV Indoor microcomputer Pin 5V Pin 5V 4 95ms 33ms Transmit receive 1 frame switching time Fig 3 3 Voltages Waveforms of Indoor Outdoor Microcomputers Indoor to Outdoor Communications 40 18 suige p euin Bul
28. s SVA ts ec z 5 5 lo LG ROTATION NO FB OV TE s 5 24 DC FAN OUTPUT Micro Computer Fig 6 1 First 35V power which operates the indoor unit is generated 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 33 7 Fan Motor Drive Circuit eiii 35V Micro computer DC fan W N motor output R751 0781 Fan motor DC fan motor Speed feedback R631 0631 Y Fig 7 1 1 1 1 Voltage at point i Waveform Ti T1 Low speed T2 T2 High speed HDTI TT Voltage at point Waveform
29. Max3min i a 1j erepti 22 21 released Preheating judgment TEN Ultra Hi Indoor fan M Control Control by Control by heat exchanger temperature ATI eat exchanger temper FI eat exchanger temperature H Silent Ultra Lo Operarion lamp Max WMAX2 Rating WSTD K 1 Compressor speed Outdoor fan Reversing valve Cooling ON 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 and ii outdoor temperature is lower than 10 and iii Temperature difference between indoor temperature and set temperature has a corresponding compressor speed 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 speed WMAX will maintain for 120 minutes if indoor temperature is higher than 18 C No time limit constrain if outdoor temperature is lower than 4 C During Hotkeep or Defrost mode indoor operation lamp will
30. 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 Support hooks 11 Power P W B 7 Support hooks Fig 10 89 PARTS LIST AND DIAGRAM INDOOR UNIT S S 77 n gt S gt gt SA ___7 MODEL RAS 35FH6 d 90 INDOOR UNIT ENO PARTS NAME RAS 35FH6 VERTICAL DEFLECTOR R AN MOTOR 25W 1 1kg ANGENTIAL FAN AN SUPPORT ASSEMBLY AN COVER AN MOTOR SUPPORT VAPORATOR ASSEMBLY UNIONG NIONG PPER COVER PRING TERMINAL BOARDCP TERMINAL BOARD 2P OWER SUPPLY CORD HERMISTOR ASSEMBLY POWER SWITCH PWB MAIN PWB INDICATION CONNECTING CORD 12P ELECTRIC PARTS COVER OVER TERMINAL RAIN PAN ORIZONTAL DEFLECTOR EFLECTOR SUPPORT UTO SWEEP MOTOR RAIN EAT INSULATOR PIPE RAIN HOSE RONT COVER ASSEMBLY COVER EARTH OVER SWITCH RONT PANEL AIR FILTER R IR FILTER L COVER LOWER R OUNTING PLATE EMOCON SUPPORT CREW ASSEMBLY EMOTE CONTROL ASSEMBLY COVER ELECTRIC COVER MASKING m gt 1 2 3 gt gt
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35. 1 55 15 79 1 34 13 66 1 15 11 74 0 98 10 02 0 83 8 48 0 70 7 10 0 58 5 89 0 47 4 81 R410 A The values above are the theoretical ones gt e Checking the IPM main P W B When the self diagnosis lamp lights in the same condition as above The compressor is defective Replace it and seal refrigerant If the compressor checker for an inverter type air conditioner is available re check using it Perform a final check of operation HOW OPERATE USING THE SERVICE SWITCH THE OUTDOOR UNIT MODEL RAC 35YH6 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 minutes DC VOLTAGE CHECKPOINT Electrical box cover DC VOLTAGE CHECKPOINT Unit top cover Cautions 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 indi
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38. and of CN3 on the mode indoor unit control P W B In the heating season set the temperature to 32 C in the heating b Normat Dessvqgosdav mode Does the operation lamp light or blink Brown Bed Is the voltage correct Yes No Yes Is the compressor running Check if the connecting cable connected incorrectly inserted Running N Not running incompletely or disconnected Open the outdoor unit and observe the self diagnosis lamp LD301 Count how many times the lamp blinks Blinks other than 1 time Blinks 1 time V Can the unit be operated using the outdoor unit service switch See the nameplate on the outdoor unit for operating instructions No Yes Check the refrigerating cycle In the event of overload limit cut or OH thermistor temperature rise use the self diagnosis memory function because p l us such failure may evade detection due to Check the outdoor Check the indoor ambient temperature variations or other factors electrical parts electrical parts 69 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 or 20V being generated between terminals C and D o
39. 3 Cooling Room temperature lt 25 C 3 Heating 3 C is the fine adjustment value from the remote controller gt Room temperature p Heating 16 27 Outdoor Judging operating mode change during operation Continuous judgment temperature temperature ultra Lo mode other than during preheating cooling is recovered at 18 33 C Auto When the compressor is running at maximum speed In modes other than during hot dash or when recovered from defrosting left Temperature set E for cooling 42 66 37 66 32 66 29 66 Compressor stopped Heat exchanger forcibly for 3 minutes Hi or ultra HI temperature t fan speed set 1 Runs at until first thermo to auto I off after operation is started Med S 2 Runs at Lo when thermo is Lo T off o 3 Hi Operates at Hi regardless of the Set to ultra Hi when the Set to ultra Lo Lo Med Hi ultra Hi or stop depending on the room temperature and runs at maximum time Set to stop if the room temperature is 18 C in the ultra Lo mode other than during app i i 5 speed and to 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 recovered from defrosting n 8 Med Operates at Med rega
40. NET WEIGHT 35 x After installation SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT DIMENSIONS mm ROOM AIR CONDITIONER INDOOR UNIT OUTDOOR UNIT FEBRUARY 2008 Hitachi Household Appliances Wuhu Co Ltd Check the grounding to see whether it is SAFETY DURING REPAIR WORK In order to disassemble and repair the unit in guestion be sure to disconnect the power cord plug from the power outlet before starting the work If itis 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 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 occurence of any accident such 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 ter
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44. 6 5 75 2 90 9 89 6 35 3 95 5 RAC 35YH6 POWER SOURCE DC 5V 35V DC 140 350V OUTPUT 25W 40W CONNECTION Control circuit built in BLU BLUE YEL YELLOW BRN BROWN WHT WHITE GRY GRAY ORN ORANGE GRN GREEN RED RED BLK BLACK PNK PINK VIO VIOLET MAIN ELECTRIC COMPONENTS FOR OUTDOOR UNIT NAME RATING APPLICABLE MODELS REVERSING VALVE COIL 135 O 20 C RAC 35YH6 REACTOR L1 13 mH 0 224 Q RAC 35YH6 REACTOR L2 25 5 mH 0 37 Q RAC 35YH6 FILM CAPACITOR 45 uF RAC 35YH6 17 COMPRESSOR MOTOR Compressor Motor Specifications RAC 35YH6 ITEM COMPRESSOR TYPE ASC092CD A8JK POWER SOURCE DC 220 350 V OUTPUT 750W WINDING RESISTANCE YELLOW COMPRESSOR 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 conspicuously replace the compressor 18 WIRING DIAGRAM MODEL RAS 35FH6 RAC 35YH6 INDOOR UNIT SINGLE PHASE A CAUTION The marked parts A are very important ones for safety N CONTROL WIRELESS REM
45. 60 Reset output 18 Tele N 858 8 5 2 10V 3l 1 5 G o PARIS 8 p d 8288 Reset Main P W B Fig 6 2 1 IS OVL Currenttransformer CT1 reads the input flowing current and detected to the microcomputer as a voltage signal Receiving 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 6 of the microcomputer exceeds the set value the microcomputer decreases the rotation speed of the compressor and reduces the load Voltage at microcomputer pin gt Rotation speed of compressor Command rotation speed Actual rotation speed Decelerating Accelerating Decelerating Accelerating P lt pt Fig 6 3 2 ID OVL Fig 6 2 The filter consisting of R245 and C217 removes high harmonic freguencies 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 gt DC current low Amplification low gt DC current high Fig 6 4 shows t
46. Cooling Sleep Operation Dehumidifying Operation Room temperature 1 Set to 7 holirs Sleep button i Cooling preset temperaure Timer lamp Remote control Sleep Hi See basic Indoor fan Med operation a Start Stop button Silent Operation lamp Sleep Lo Thermostat judgement Outdoor fan OFF 1 min ON Indoor fan m m m m M 15 sec Horizontal air Shut Outdoor fan m deflector Horizontal Reversing valve Facing down Cooling on model Compressor speed The sleep operation starts when the sleep button is pressed When the sleep button is set the maximum compressor speed is limited to CSZMAX and the indoor fan is set to sleep Lo The indoor fan speed does not change even when the fan speed mode is changed If sleep operation is canceled by the cancel button or sleep button all data is cleared STARCP Compressor speed Notes 1 The operation is done assuming as the preset temperature room temperature at the time 2 C 2 The indoor fan is operated in the Lo mode During thermo OFF indoor fan will be OFF for 5 minutes and ON for 1 minute delayed 32 seconds after the start of compressor operation The compressor is operated forcedly for 3 minutes after operation is started The minimum ON time and OFF time
47. M RETA 5 227 1045 1 C M R901 10 5 6 C M 5217 raon 0 R228 10 5 8 M R902 10 59 t C M SSS JUN R225 R229 10K 5 1 6 C M R903 10 5 16 M R288 R230 10K 5 1 1 C M 2 R231 10815 6 M R905 453 1 1 6 A M 83041 o x t 2 R232 10 5 8 c M R906 100 1 11 M 5V TT 25 03 R233 5 11 C M R907 IM 5 1 C M R234 100 5 1 4 M R908 1 M eL SITE 8235 10158 R909 510K 4400 150 WHITE 10301 R237 5 11 R911 M SER R238 100 5w Vt C M R912 M 80 25 3400228 BLACK R239 1005 C M R913 M OUTDOOR TEMP g R240 10 5 C M R914 100K C M THERMISTOR 5 x R241 5 6k sii C M R915 100K 5 1 16 C M R35 1 433kQ 2 55935 R242 5 11 18 C M 916 100 5961 15 C M B0 70 3400K 2 P R243 6 98k 1 1 18 C M R244 2K 5 6 C M Ov R245 10 15 8 M R246 IK 1 6 M R247 1 5k w vis M
48. MODEL 5941 N RLI 64 HIP RL2 FIR FOAAI2E 541 8450 DI H P RL3 FIR F3AA012E H DIODES E 00 R P 060021 0 01 SYMBOL MODEL 60091 047 HIP PHOTO COUPLERS 081 028860 0006 DB2 010 860 SYMBOL MODEL C007 0 01 8 CIRIP 083 D10x860 1 TLP421 H P 008 001 C PQ2 TLP421 HIP coool 0 150 C R P 002 1GH46 80401 TLP421 H P r P 003 1GH46 402 TLP421 H P cotil o arhe F H P 004 1GH46 PQ403 TLP421 HIP C012 0 010 C RIP 0404 TLP421 C018 0 019 0 8 020 RL4Z HIP PQ701 TLP421 021 1012 A P D22 RN2Z HIP 021 40000 D HIP 227 00115 1 0 6 08 5 s 00227 40000 D H P syMBOL RATING coza 45019 FIH D30 15512 LOO 1 HFT08TL3 5868 A P 0 01 16 8 031 56016 1002 0 1 5 6R Al P C101 0 082 1 F HIM 032 AG01Z L003 J W A P C102 0 1125 c M 5116 D001 188120 A P 11017 18 N 11028 H 6200 0 1125 C M L8O1 RRMF3787 H P c201 0 1125 0201 TOTEM 1802 108719 58 P C202 0 125 C C M L803 RRMH3513 H P 020410 047 50 c M L80435 HIP D206 DAN202K C M n 2208 M TIET TTT L 9O 1 m 208 0 125 0501 EIER RRMF32484 H P C209 0 001750 C C M C210 0 047 50 C C
49. Replace the battery Check the LED D1 with a multimeter l Does the radio buzz noisily ves Dus MV Within 15 cm gt Check the indoor unit signal coking PW t m gt If it is good check the main P W AM radio You can check the remote control switch by other methods as explained below Using the test card Ultra redray test card Sensible area Check functions again If it does not work replace Within 2 cm the remote controller The sensible area should flash in orange when you operate the remote control unit if it is good 73 PRECAUTIONS FOR 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 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 x When rep
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51. 280V 300V gt Chopping period Chopping period 208 sec ON Upper arm transistor Current at Fig 4 3 Voltage waveform at each point When power is supplied Ut V because of that U is chopped current flows as shown below 1 When U transistor is ON U transistor gt U coil gt V coil gt V transistor gt DC current detection resistor Point Fig 4 1 2 When U transistor is OFF by inductance of motor coil U coil gt V coil gt V transistor diode gt Point Fig 4 4 44 DC VOLTAGE 0100 C110 14 DETECTIVE RESISTOR Fig 4 4 Power module circuit U is OFF V is ON Since current flows at point B only when U transistor and V transistor are 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 Table 4 1 POWER P W B MAIN P W B Self diagnosis Self diagnosis lamp and mode Blinks 2 LD301 nies 59504 Ip peak current cut 0302 LD303 XN Abnormal low speed rotation Blinks 3 LD301 times Switching incomplete 45 times IPM drive circuit The inverter
52. 5 tt C M wT wT R39 2 RIP 3 5523 R41 1M 5 1 4 A P R283 0 M 2 R42 10K 5 1 8 A P R284 10K C M 4 Ts R605 R285 4 7K 2 116 M R286 5 p M 8508 R45 220K 5 2 A P R287 1 8K 2 1 18 C M bI R46 220 5 2 A P R288 51K 5 tt C M R607 847 470K 5 1 8 A P R289 5 1K 5 tt C M R290 5 tt C M R291 58 16 ey 8292 3 2 C M 5 55553 050 0501 R293 390 5 1 16 C M E R294 390 59 15 C M 80201856 R295 390 5 1 6 C M 45 z zs 2515 R296 390 5 1 6 C M EM 5 2 Gl E 55 ae 3 ov 002 2 215 5 R297 10 5 M Du i 7 1 4 0911 m gt 5 gt 9 360 9 54 1 2 A M R298 5 IK 5 C M ih 8004380810 58 1 2 Al M 00 ee ENAA 8005 96 1 16 A P 8300 2K m n idi 20219 8006 1 1 1 R301 3 74K 19 1 16 C M ov 7 5 007 100 5 10 H P R302 3 01K 1 1 6 C M os p R008 240k 5 1 2 A P R303 3 01K 19 10 C M 9 1 12 B 5y sv R304 100 5 fs c M DG EI b R35 8 D 810111 R305 100 5 116 M Q 0204 iz R102 R306 100 5 1 un C803 1 Pa Selo 5 R103 290154 R307 1 5 1 C M TERMINAL R104 15 5 6 BOARD RA ST R105 4 7K 5 vu C M R401 100 5 R1
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54. 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 P W B 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 N F FILTER ICP CIRCUIT MAIN P W B RECTIFIER COMPRESSOR H HARMONICS H f IMPROVEMENT i SWITCHING POWER SUPPLY REVERSING VALVE lt CONTROL CIRCUIT ELECTRIC EXPANSION VALVE CONTROL CIRCUIT CIRCUIT SMOOTHING CAPACITOR Fig 1 1 FAN MOTOR CONTROL CIRCUIT INVERTER CIRCUIT INVERTER CONTROLCIRCUIT EV RESET cincum COMPUTER POSSITON DETECTIVE CIRCUIT THERMISTOR DETECTION CIRCUIT 35 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 compre
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56. 0V at disconnected or reversed pin of CN3 If normal check the outdoor unit P W B Is 12V or 7V being output 2 normal Replace ICP1 Check if the air Normal if it is less than 10 Blown open if itis 100 more deflector motor is shorted and P IC111 0111 C114 ZD121 are defective Yes If shorted defective ICP1 will be Normal open again at relative to OV at of C114 Yes Open Replace the terminal board Insert the connection cable securely Has the terminal board thermal fuse blown open 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 X1 When the unit is not in operation the voltage across the 35V line may drop to 20V X2 When the unit is not in operation the voltage across the 12 V line may drop to 7V 72 CHECKING THE REMOTE CONTROLLER Install the battery in the correct polarity Is battery polarity correct Yes YV Yes Is the battery check sign flashing gt Vs Turn on an AM radio bring the remote control switch within 15 cm of the radio and press the ON OFF button V
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58. 25 050 c 9112 28052098 074 LD202 SLR 3320C3F mg 1 34 H 1 7 5 5 18080 1025 CN9 PA 4P TOP 124 R121 0 56 5 1 4W C R508 10K 5 11 161 c R641 10K 5 1 16W 030 C R821 1K 5 11 161 033 C C121 0 1 25 c 6 4 4 3 1280 52088 07416 15203 15 332 3 135 H 0810 XA 8P Top 9 8 R122 100 5 1 16v 042 R509 10K 5 1 16v 030 R642 1K 5 1 16V 033 C R822 1 0K 1 1 16v O17 C122 100 4 107 suo 068 R osale Oscillator 10801 2803 085 C 4 030 17 050 7 8123 3 3K 5 sani 8510 10K 5 R651 1K t5K 10W 033 C R823 10K 1 i c C123 0 14 25V OT 0631 1000PIsov clos3lc ia 0791 Jumper Modell Switch R124 100458 1 16W c R511 10K 5 1 10V c R652 1001 5 88 042 C 82 48 25K 14 1 16W 6 C131 0 22 507 0851 0 1 5710105010 ra s Use Syntol traita Model ents R512 10K 5 1 10v 020 R653 1K 5 1 16V 033 C R825 1 0 1 017 C C132 0 1 25v C 050 C quid 0 c Symbol Don t Use RES1PFSUS0 1 OMHz 107 R Symbol ps 812 R513 10 5 1 16 030 C R654 108 5 1 032 C R826 1k 5 1 16 033 C TEN m 3 12 18 MN Photocoupler R514 10K 5 1 16W O30 R655 10K 5 1 10W 020 C R827 3K
59. CN2 on CNS the control P W B 2 Remove the P W B from the P W B support 2 Remove the upper hook from the indicating P W B lock resin pull the P W B forward a little and remove it 63 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 Indoor unit fan motor 12V Power circuit 12V line ICP1 5V 5V line Power circuit 20121 20V Zener Diode 2 The CN3 power supply and CN10 fan motor are the connectors with lock mechanism Press the lock with your fingers to unlock and remove the connector Press here Lock 3 When checking the voltage and waveform do not connect the probes to the forbidden areas show below Touching them may cause the ICP1 blowout and 111 failure OK font N ICP1 35 V line 5 2 S Source D Drain G Gate p IC111 Forbidden area Gate G to 0 V Forbidden area Q111 is a MOS FET and its gate terminal is a high impedance When a probe such as a multimeter is contacted with the gate the 0111 may have the continuous ON state to supply overcurrent in the circuit causing the ICP1 blow
60. COMPRESSOR ASC092CD A8JK 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 em eouei dde eui Aejd op eq eoueidde siu esn yey eunsue 105194 ejqisuodsai e Aq Ajayenbape HONOLL NOG 994 suing Bunoeuuoo pue edid y jou u q ssejun suos1 d 10 Ag esn 10 pepueiur jou si 52uel dde siu unu 196 Joopino BUI JO pue svens yono Piezeu yoous 511995 dup edid urejp ay 10 sued eu ued 10 e BUISN O sajes INOA uo auuosiad pezuouine
61. Circuit diagram of the module HIN HOI HS LINT 101 Oh LIN3LO3 Terminals symbol mark of the module See next page for measuring value using multimeter m nmm 32 30 2826 20 13 10 29 Fail signal 31 29 27 25 2119 17 1412 75 3 35 INVOV 36 0V 37 N 39 W 40 V 41 U 42 86 Diagnosis procedure of IPM using multimeter lt lnverter 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 note 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 7000 0 0 a U
62. 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 actually 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 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 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 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 This is not an error The anti cool air function shows this phenomenon 58 AUTO FRESH DEFROSTING After the ON OFF button is pressed to stop heating the ou
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64. M 271888 15 SURGE ABSORBERS C213 0 04750 C C M 1 W50NR 120 R P 021410 06825 C C M D801 188120 VS2 0 10_ C215 0 1125 cC M VS3 asona 120 621619 0047 50 C C M D901 DINL40 c217 2210 DI RIM 09021010140 HIM SA1 RA 102M 06 Y R P 0 125 D903 DINL40 H M C219 2216 D R M c220 0 1125 0911 SWITCH 0912 62220 022 25 C C M 0913 M C223 0 0150 6 6 TID SWI R M C224 0 01150 c c M 225 0 050 CICIM D916 M OSCILLATOR C226 0 1 25 C SYMBOL MODEL 185 dU BER X1 6 M LED C304 0 1125 c C M mE SYNBOL USE UN Ust 540111092501 RIP 8 Tale SYMBOL MODEL E JW002 UNUSE 10301 C501 470pl50 c M LD302 0502 470p50 c C M JW004 USE A P 10303 05031 4709501006 JW005 USE 1 0504 JW006 USE A P 0505 SE CREE M SYMBOL RATING STR L472 H P C2 ULN2003ANS S M C3 BA10839F S M C4 NJN2804N TES S M C601 o 650 C C M ZENER DIODE CS Numegoav Tet 5 M C602 0006050 c C M sre C6 M54532P H P C603 o 000650 6 SYMBOL MODEL 515 C7 5246028 2 8 S M 08 04 0 00068 5 C M 7001 C605 0 001 50 C C M C606 0 001 50 C C M REGI 058008 H P 060710 001750 C M REG2 sE012 H P C608 0 1125 C M T AX 8T
65. W B 3 Pull the support hook at the upper side of the indication lamp of the indicating P W B and pull out the P W B forward Control P W B Support hook Indicating P W B Fig 4 88 4 Tangential air flow and fan motor 1 Remove two screws locking the drain pan 2 Press to lower the hook at the center of the unit a little and pull the claw forward to remove the drain pan Fig 5 3 Remove the screws from the upper and lower bearing covers 4 Remove the locking hook of the lower bearing cover from the Cabinet Upper bearing cover Cabinet Fig 6 5 Remove two lock screws from the fan motor holder 6 Pull up the evaporator by holding it at the lower side Insert a screwdriver through the space between the evaporator and drain chute and loosen the fan lock screw to remove the fan and fan motor OUTDOOR UNIT RAC 35YH6 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 Pull the right side of the front cover a little and pull up the left side to remove it from the hook lt BN ANT 5 gt
66. ah 0 19 6 8 mun tah 14 2 EM ROTATION NO PB E s mus o AAA pui Q141 A 15 Eljo roe 9 12 1 Pub eo 5V BL 5215 ME 5 n v s 2 3 gene feoi Sz EB gt 65 2115 f S 5 AUTO 8 2 Lo Terminal for EEPROM n v Zj gru S Z 3 Ela D 3 s diss a m foo 2 gt gt Fx data writing 0102 5 15 181 4 a 2 a S R141 5 9 49 slqgBs iRESEEREE 5 4 da d 4 E 5 Z EE e SDA 17 18 19 feo 21 22 23 24 25 ee 27 8 29 Bo B1 82 601 B R767 Vour Sensor RES 2 EXC Unit D gt d s RT66 22 ja LD202 Timer t IRR 0V T nt q 5 c GND R765 od 5991 Operation AT i 12V LD203 Filter 4 6 12V 3 y 3 10 RX C531 22 SWL Room temp Theni je 2 11 UNT Temporary Sw 6 ry 49 H LINK E R211 M 8 O CZ 12P Side Board In 0v RESISTOR Capacitor Diode Coil C t m gt Circuit s Numerical gt z Cirevit s Numerical gt 18411 5 01 6111 s Model Dreniag s z 019874
67. blink at interval of 0 5 seconds ON and 0 5 second OFF When heating mode starts it will enter into Hotkeep mode if indoor heat exchanger temperature is lower than YNEOF 0 33 C When fan is set to Lo compressor speed will be limited to WBEMAX When fan is set to Med compressor speed will be limited to WJKMAX When fan is set to Silent compressor speed will be limited to WSZMAX In Ultra Lo fan mode if indoor temperature is lower than 18 indoor fan will stop If indoor temperature is higher than 18 0 33 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 speed is actual speed x DWNRATEW 27 Heating Sleep Operation Reversing Valve Defrosting 15sec or more Auto fresh defrosting gt lt Over defrosting inhibit period 30sec Fan speed Start Stop button set to Hi signa Preheating judgment LPreheating released hating GY IEEE Hi Med Indoor fan Lo Silent Setto 7 hours Ultra Lo Sleep button Operation Operation lamp 11111111111111111111111111111 11111111111111111111111111111111111 Timer lamp Reversing valve cooling on model 30566 2min 30sec Indoor fan
68. microcomputer and 10MHz at pins 0 and being generated normally Yes Replace the control P W B oscillator Perform final operation check X1 When not in operation the unit will enter into a low power standby state possibly causing a voltage drop to the 12V and 35V lines as shown below 25V 20V 12V 7V 70 2 Indoor fan does not operate others are normal Can the fan be stopped by remote control No Yes Yes The microcomputer fan PWM output at pin Q3 is 1 5V Replace the microcomputer No 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 microcomputer pins 9 49 when auto swing is turned on in the fan mode Yes Is a voltage over 15 or below 10V No Yes being generated on the 12V line Replace IC111 Replace the microcomputer Check IC711 If it is normal replace the air deflector motor Perform final operation check 71 4 Check the control P W B power circuit 15 35V or 20V being output Check to see if the connection cables are at pin relative to
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70. shown in Table 8 1 when measured by multimeter Table 8 1 Operation condition Collector voltage of Q701 Cooling General operation of cooling About 0 8V Heating In normal heating operation About 35V MAX rotation speed instructed by indoor microcomputer after defrost is completed About 35V Defrosting About 0 8V Dehumidifying Sensor dry 54 About 0 8V 9 Electric expansion valve control circuit POWER P W B MAIN P W B 5V l 1 CN15 B 12V B 12V B 12V 2R4032 R404 m a R401 1 8 PQ401 R293 4 b 1 1 89 Valved 3 402 R204 L 3 3 2 40 Valve3 Electric PQ403 R295 ____ expansion 2 D 2 4 41 Valve2 valve 404 i A UPON 3 o 8996 vavet CN4B L C401 IC6 og E Fig 8 1 Todrivethe expansion valve use the 8 12 V output Use a 4 phase coil and feed power to the 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 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 and when no power is supplied 12 V is applied When the power is reset the exp
71. 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 mode The following shows the typical values of outdoor temperature in relation to the voltage Table 7 1 Outdoor temperature 10 0 10 20 30 40 R303 Voltage V 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 64 are approx when the thermistor is shorted they are approx 5 V and 0301 blinks seven times However an error is detected only when the OH thermistor is shorted in such a case the blinking mode is entered 12 minutes after the compressor starts operation 53 8 Reversing valve control circuit C 35V Power P W B N MAIN P W B 12V CN2 O D701 JK IS I Y Pol 4 1 CN4B CN4A Microcomputer 1 1 P DC voltmeter or multimeter D 0V Fig 8 1 Reversing valve control circuit will switch reversing valve ON OFF cooling ON 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
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74. 06 10415 8 M R403 IK 5 d R107 0 24 05 2 R M R404 IK 8 3 EPROM 19 vil M 1 257 SI op R109 15K 5 6 M R501 2K 5 C M 1 pi i 5 55 E i tO wire R502 2K 5 C M n 813818 5 E ee ja E 9 R503 28 5 10 M 8474 0202 H zm E Tem OV NORMA R195 390 s liu M R504 2K 5 1 18 ep id mA R196 390 5 1 15 c M R505 2kl 5 1106 M 3 101 0 4 cool 1 R197 39015 1 8 C M R506 2K 5 lji ic m a 390 5 C M mun k 622001 VALVE MEN ACT CHOPQ 3 MA R199 10015 8 M R513 10K 5X C 004 Y 4 viti COOLING 0 9 z NORMAL 79 8742 R200 10K 596 1 15 M 51415 11 5951 16 C REVERSING 0 38 EHE AA o ACT TD R201 10K 5 C M N CURRENT RELAY TRUE MICON R202 105 5 1 C M R6O1 2K C M z 2 32 38 Ag CIPOWER RELAY UN 5 79 R230 R203 2 5 8 R602 2K 59 m 5 5 QSELF DIAGNOSIS SENSOR SELECT R229 R204 2K 5 R603 2 5 ab DIAGN0S182 1 2WAY VALVE ON d ove R205 100 5 6 M R604 100 5 1 18 C M 191 1 5 TUR MEN aija ja toi 290 Y R206 10 5 c M R605 100 5 C M VH2P 315 20 korce KIP RB 3216 0208 R207 10815 8 6 R60
75. 1 Self diagnosis 0 LSB Defrost reguest signal During forced operation Multi bit 1 0 O 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 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 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 Fan 2 MSB Fan 1 Fan 0 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 01 01 01 0 0 O 0 0 1 0 1 0 1 0 O 1 0 O O 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 Character No Contents 42 2 Indoor message z D O 9 O Contents 4 IPM Intelligent Power Module Fig 4 1 shows the intelligent power module and its peripheral circuit The three transistors on the positive side are called the upper arm and the three transistors on the negative side th
76. 1 COVER CAPACITOR 52 CORD ASSY 93 Jo N HITACHI RAS 35FH6 RAC 35YH6 AW NO 0025E
77. 11 S M C801 0 15 50 F R P 071 UDZS 208 IPM 1001 H M C802 0 02250 F R P C803 0 01102 R P C804 0 0151 R P C805 68 50 D R P C806 0 15 50 F R P C809 0 C R P 810 0 01029 R P C820 10025 D R P BLOCK DIAGRAM MODEL RAS 35FH6 RAC 35YH6 INDOOR UNIT OUTDOOR UNIT Outdoor DC fan motor Power source 10 50Hz 220 230V HARMONICS POWER SWITCH POWER RELAY RECTIFIER IMPROVEMENT IPM CIRCUIT Inrush current A DC compressor Protection circuit motor 1 Rotor magnetic pole position gt detection circuit Wireless receive zm Ip Remote controller vy circuit gt Buzzer circuit Id Room temperature Filter gt thermistor gt Indicating lamp Operation Timer Is gt Heat exchanger gt thermistor 5 P 5 d Weekly Timer Wired Remote Control lt x s Auto sweep m
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79. 2 5 C M GREEN Ius PST R02 3 3k 5 R249 20K JA 10 fios E ROS 680 596 P 8250 10K 53 10 c M 0 6 5 R251 5 1 16 0 M GREENS mm W ov ORANGE i ROS 2 2K 5 P R252 5 1K 1003 1002 9 TABO2 x B amp 807 41124 R254 100 5 t 1 C M R255 2K 5 110 ET 901 toi T 00 15 1 1 R10 1 1 1 4 R256 5 C M is 10101 1 RIT 1 1 1 R287 ak 5 16 M 2 9 R107 R258 1K 5 C M N E FM 5 1 R13 39015 11 1 Al P R259 3 25K 1 1 6 C M 0102 R260 1 1 6 C M sv R102 1900000 R15 33 1 P R261 10K 1 1 6 C M 4 CN24 t 2 R262 2 191 f R20 2 20 5 1 4 Al P 8263 1 5 WHITE 15 0V bt 7 SW TRANS C 35V RARE 5V 09410250 R264 5 1 5961 90 M ce eum OA uu 11 R23 P R265 5 1K 5 10 M 05 3 R23 N R24 R266 390 5 1 C M ee 1 U t 1 R25 100K 5 1 4 Al P R267 390 5 M 4158482849 4118 Ban 1970 pus tes R268 2K 59 i cim Wo ig t 9 24 R276 100 5 1 6 C M 2 5 T vu Lm 1 R34 R277 100 5 11 M 1204 51515 R35 6 8k 5 1 R P R278 100 5 c M y t Vov R279 100 5 tt C M 5 3 i R280 10K 5 1 16 c M 12V W state R281
80. 3 060 Reduce 2 deg Reduce 1 060 The initial Increase 3 deg from the value from the value from the value setting value from the value 5 Press START STOP button to complete the shift value changing procedure NOTE 1 The indication of the changed shift value and symbol of COOLING or HEATING will disappear after 10 seconds 2 The changed shift value will remain unchanged after turned off the power 3 When 0 is indicated the shift value is at the initial setting 82 JUDGING BETWEEN GAS LEAKAGE AND CHECKING THE REFRIGERATING CYCLE Gompressor DEFECTIVE 1 Troubleshooting procedure No operation No heating No cooling Lighting mode Blinks Blinks Blinks Blinks Blinks Blinks Self 2 times 3 times 4 times 5 times 6 times 8times diagnosis lamp 12022021222 Connect U V W phase leads to the power module again and operate the air conditioner Is the self diagnosis lamp mode as shown on the right YES Stop to operate and check the gas pressure in balancing mode Error Gas leaking Gas leaks Repair and seal refrigerant Within i 1 Time until the Approx lamp lights Approx 10 seconds 30 Seconds N Blinking e Outdoor air temperature Charge port pressure C MPa G kgf cm2 G Possible malfunctioning Compressor part 50 2 96 30 14 2 62 26 72 2 31 23 58 2 03 20 73 1 78 18 14
81. 5 1 16W 037 PES N m TIS buzzer wr 11091 s Model 89 z R515 10K 5 1 16v 030 856 1K 5 1 16W 033 C R828 108 5 1 16W 030 0211 16V we 069 iev 01049 Iek Cirevit s ode Symbol R141 2 7K 5 1 19v O1 5 R516 10K 5 1 16v 030 C R657 1K 5 012 C R829 5 1K 5 1 16V 040 C C212 157 c 949 T 150plsov closal c 9220 0110 9801 180812 Synbo Zener Diode PC911 TLP421 TP1 BL 075 C 131 gt C912 75 C 8517 410 5 1 16W 030 C R830 1K 5 1 6 006 A o sovi 063 8 7150 Use 044 BZ1 JPKM13FPY H Model TLP421 TP1 BL 0 R211 1K 5 1 16v 933 C RS18 100 5 930 c R701 1K 5 1 16W 033 C C302 0 1 15 0 050 0 C EDS 1 1115 Use 04416 Sensor Uni Symbol 117 R212 47 5 1 10v O1 6 c R519 10K 5 1 16W 930 C R721 3 3K 5 1 16W 036 C R911 5 60 5 1 10W 045 C303 0 1 25 0 50 C 804 1 ois 2041418086 SOUND 140410 R520 10K 5 1 16v 030 C R751 2 7 1 58 1 034 C R912 2K 5 1 10W O46 C304 0 1 25 050 C Qver Current Protecter Symbo 018 030 046 T I R301 12 781518 18V oi g 8521 1081581 18 Rots 581558 1 10W 507 0 AE c821 0 01 07 09 1 R Q521 DTC114EE TL 078 C ris Model Rating
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83. 6 100 5 1 6 C M 1 2 4820 2163 tt freee R208 10815 C M R607 100 M 5 3 GICOOLING SIGNAL 0 50169 0706 TS 2 L 1 N fy S SELECT VALVE amp Aa 8773 209 10 5 C M R608 6 65 1 1 16 C M ET avy GISELECT VALVE B MULTIPLEXERG 47 R210 10 15 C M R609 5 65K 1 1 16 C M W 8 SW S R211 5 1 16 M R610 65K 196 08 C M R4043 8403 RET 086 REVISEGA 0223 R212 1 5 C M R611 6 65K 191 16 6 M t r1 R213 TESS R213 10 5 8 M R612 100k M 9401 ETES 1 R214 10K 5 Vl M R613 0 1 2111111 gm R215 10 15 c M 8615 360 0 54 1 2 Al M t H 3 cn R216 1ok 5 lis M R616 360K t 1 A M P 0402 5 5 ja R217 10815 8 M R617 360K 0 38 1 2 A M 2 R218 10 5 C M H v 219 710015 1 8 C M R701 1 2 5 P EXPANSION a F Pasos 1 H e 82201 705 7 5 596 11 P CNTS WHITE m 410225 F 8221 1011 1 c m R706 5 1 8 A P XA 6P Wee R222 51015 1 4 C M R801 39 596 1 t 0404 3 MA rest 223 10 8 8 C M R802 39 5 75 voor 523 PIN R224 100158 R803 3K 5 4 S tst 6418 R225 iklswivulejm R804 i G MH CU R226 10 15 8
84. ABNORMAL SOURCE CABLE 15 WRONG CONNECTED POWER OPOWER P W B OMAIN P W TOTIMES SOURCE 4 FAN LOCKIOUTDOOR FAN RPM 15 OFAN MOTOR ERROR NOT ROTATE AS INTENDED FAN MOTOR CIRCUIT 127IMESI RPM EEPROM MICROCOMPUTER CANNOT READ READ THE DATA IN EEPROM OMA IN P W B 13TIMES ERROR XEXAMPLE OF B LINKING 5 TIMES LIGHTS FOR 0 25 E SEC AT INTERVAL OF 0 25 SEC MU SH di SELF DIAGNOSIS LAMPS LD302 LD303 SERVICE SWITCH 67 OUTDOOR UNIT Remove the compressor connector 1 2 IPM Intelligent Power Module 3 Service Switch 4 Self Diagnosis Lamp
85. AIN P W B CN3 CN4 R701 12V display R006 OV display The unit won t operate C21 12 display J27 J30 MAIN P W B error 5V 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 0V display LD301 blinks 5 times Expansion valve error 15V 14 17V DC fan motor CN24 C06 side 06 side LD301 blinks 3 times MAIN P W B CN3 CN4 35V 33 5 38V Indoor unit electrical parts D20 cathode J5 J17 Indoor unit won t operate Terminal C D C 35V display Terminal D red line Reversing valve CN2 Terminal C blown line Check each voltage If each voltage meets the voltage specification above the power circuit is normal f 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 the wiring otherwise the components may be damaged The failures of the loads are as follows Failed Possible causes C
86. AK COMPRESSOR PEAK OMAIN P W B CURRENT CURRENT WAS BEYOND oCOMPRESSOR CU MAXIMUM LIMIT OPOWER P W B ABNORMAL 1057 THE COMPRESSOR OMAIN B 219 LOW SPEED ROTOR POSITION COMPRESSOR 3TIMES ROTATION POWER P W B 1 SW TCHING SWITCHING FROM LOW GMAIN P W B VILI FREGUENCY SYNC START L FAILURE position 2 COMPRESSOR ATIMES OPERATION FAILURE POWER P B 2 OVERLOAD OVERLOAD PROTECTION 90 04 UNIT 15 EXPOSED TO DIRECT AIUI LOWER FUNCTION IS REQUESTING SUNLIGHT OR ITS AIRFLOW BLOCKED gt LOWER SPEED THAN MINIMUMIOFAN MOTOROMAIN P W B STIMES LIMIT CUT sPEED or COMPRESSOR OTHE VOLTAGE IS EXTREMELY LOW OH THERMISTOR COMPRESSOR OVERHEATIOLEAK OF REFRIGERANT eCOMPRESSOR TEMP RISE WAS DETECTED BY THERMISTOR CIRCUIT 6TIMES OH THERMISTOR MAIN P W B 4 THERMISTOR ABNORMAL THERMISTOR OTHERMISTORPCONNECTION ATE ABNORMAL VALUE OPEN OR SHORT OF THERMISTOR DEFECTIVE TTIMES WAS DETECTED THERMISTOR CIRCUIT ACcELERATION COMPRESSOR WAS NOT 1 OF REFRIGERANT A I FAILURE ACCELERATED MORE THAN COMPRESSOR 8TIMES MINIMUM SPEED TE OCABLE 18 WRONG CONNECTED eoMMUNIcA COMMUNICATIONS BETWEEN CABLE 15 OPENOINTERFACE TIONS ERRORINDOOR UNIT AND OUTDOOR CIRCUIT OF BETWEEN INDOOR UNIT ARE INTERRUPTED UNIT AND OUTDOOR UNIT aln OABNORMAL POWER SOURCE
87. ARNING 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 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 30 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 Sd
88. B Fig 5 1 shows the power circuit for P W B O AC220 230V Qu M 81 R41 MMN w 0011 R002 0008 e e J m D20 C 35V 21005 R23 220312845246 415 D 0V 801 1 D21 4 777006 m 16 B 12V AD31 18 255 fee 600 weg 28258 9801 12 19 ov uc an Wow en a TO Rom TREG 101 da 8 3 yt 003 P a ST 518 1412 OCT 621 C23 ot i Palos gt 20 CEN i D04 PQ2 9 i A 79 e 257 Sille 1 1 cor EP 2 0001 e OV 024 i 1 E js un gt 5V 012 js Micro C11R05 i Computer R13 R34 45 54 MAIN SUPPLY ON OFF 74 0106 In the power circuit for P W B power supply for microcomputer peripheral circuits and driver circuit and as well as DC 35V are produced by switching power circuit DC 330V voltage to high frequency of about 20kHz to 200kHz 47 Switching power circuit performs voltage conversion effectively by switching transistor IC1 to convert The voltage specification of the power circuit is as follows Check points Output Voltage Main load Measuring points Potential failure modes Spec 12V 11 13V M
89. HITACHI RAS 35FH6 RAC 35YH6 SERVICE MANUAL TECHNICAL INFORMATION FOR SERVICE PERSONNEL ONLY REFER TO THE FOUNDATION MANUAL CONTENTS SPECIFICATIONS mm 4 HOW USE UTTT 5 CONSTRUCTION AND DIMENSIONAL DIAGRAM 15 L MAIN PARTS COMPONENT S 17 WIRING DIAGRAM T TYT 19 CIRCUIT DIAGRAM TYT TYT 20 RAS 35FH6 BLOCK DIAGRAM mm 22 TI BASIC MODE 23 5 REFRIGERATING CYCLE DIAGRAM 29 DESCRIPTION OF MAIN CIRCUIT OPERATION 30 SERVICE CALL Q nanana n 58 END TROUBLE SHOOTING YYUT 61 Procedure for Disassembly and Reassembly 88 PARTS LIST AND DIAGRAM 90 RAC 35YH6 SPECIFICATIONS DC INVERTER WALL TYPE INDOOR UNIT OUTDOOR UNIT MODEL RAS 35FH6 RAC 35YH6 POWER SOURCE 1 PHASE 50 Hz 220 230V TOTAL INPUT W 1 090 155 1 460 TOTAL AMPERES A 5 22 4 99 kW 3 50 0 90 4 00 B T U h 11 940 3 070 13 650 TOTAL INPUT W 1 110 115 1 440 TOTAL AMPERES A 5 32 5 09 kW 4 20 0 90 5 00 B T U h 14 330 3 070 17 060 COOLING CAPACITY HEATING CAPACITY 750 91 548 288 47
90. IMENSIONAL DIAGRAM MODEL RAS 35FH6 Unit mm Service space Front panel Cabinet s Horizontal air diflector wo 47 When piping is drawn from the left side exchange the drain hose for the drain cap Drain cap connection port INDOOR UNIT in T j J Top air suction grill 220 780 Mounting plate N gt I Air outle 47 190 400 190 70 70 I I I I T Drain I I E Drain hose About About 108 About 370 70 Narrow pipe 96 35 I T Wide pipe 9 52 gt Power cord Connecting cable 5 30 60 60 60 81 5 Vertical air diflector 15 CONSTRUCTION AND DIMENSIONAL DIAGRAM MODEL RAC 35YH6 OUTDOOR UNIT
91. M ja ja 5 kA CNI 0 8418318181 5454 bs 58 bt pops R654 12V e Ta e T2 FE EEE EEE EEEEEEEER 4 4 CN 9 SIE 55 S R655 o o PA 4P TOP O 2032 6591 3 8 s gt gt 5 exchanger aE 8509 md 551 62 m aC Wired Remocon Thermistor 9 gt Z E E YY AUTO R307 fT 8 RM 1913 O 0v lt gt 8206 w 2 E 8 E 2 TID mi 27 AY 2 12V E ID R305 Ape E map 89211 8643 4 ROIS REC CN15 0505 poma majit ce SEND PH 5P Top BLK Pee eee s olx e ru CURRENT SELECT mur J SV SDASCLRES OV See Se 8904 E GD a 181581 REMOTE CONTROL 10 88017560 e 55 h 1011111 PWA R510 al RX 9 27120524 uru 848 TEI 15 PC912 ST CN6 TX 09 9 Joko 5 1 YT 9 1C501 AX 7X20 Pownarut 0 Io 5V PH 12P TOP z Hre Pase ov ov 4 Ei 2111 FILTER 2 L gt 8501 hst 88 5 e 2 Vee E HUMIDITY 31 1 2V OV C506 E Ped CN pes OPERATION 9 4 2 9 5 35553 INPUT Je 5
92. MOOTHING CAPACITOR lt WHT RL1 RELAY am 8007 wT POWER RELAY FUSE 60114 1101 Ie C013 ELECTRIC s 6002 H C008 EXPANSION VALVE SWITCHING vst POWER gt t SUPPLY 53 DIODE cat OSA STACK FUSE 001 DB1 g R u sas L GRNI _ FRAME BLK BRN RED TERMINAL TERMINAL BOARD A N 9 90 BOARDA GRN YEL BLK WHT RN RED INDOOR INDOOR UNIT UNIT 19 CIRCUIT DIAGRAM MODEL RAS 35FH6
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94. OTE 230 POWER TERMINAL CONNECTING SWITCH BOARD CORD 4 3 BROWN 1 BLACK 12 91 BLACK BLUE 2 1 WHITE B WHITE LINE THERMAL 3 oo lt a FUSE 107 GREEN amp YELLOW TRE qwe BROWN BROWN poe RE L EXCHANGER CN8 CN3 THERMISTOR GRAY CN 1 CONTROL cng AUTO SWEEP P W B WHT MOTOR ROOM TEMP Pu THERMISTOR 7 H LINK Rd cas INDICATING CN2 CN7 CN9 RECIEVER 125 INDOOR how B 12345611234 FAN MOTOR 12V Rx Tx OV OV 12V Rec Send OUTDOOR UNIT COMPRESSOR BLU BLUE ORN ORANGE BLK BLACK RED RED BRN BROWN WHT WHITE GRN GREEN YEL YELLOW GRY GRAY ON N OUTDOOR IV No FAN MOTOR IPM 1A FUSE N ON 4 e v 083 DIODE STACK m 082 A pep OVERHEAT THERMISTOR CN8 Wm v RED N I Q ES Lu REVERSING VALVE g 62 _ RED dm E BLK 3H py DEFROST THERMISTOR 3 CN9 E BUN Toy OUTDOOR TEMP cn 10 Ss lt A GRY THERMISTOR j S
95. R114 750 5 1 sv 010 c R 404 5 1 58 1 16 940 c R601 1K 5 1 sv 015 C R806 120K 5X 1 16W 031 C cs2i 0 3571 050 16404 08416 L201 simiiseoislo 24 110 C XA 3P To 118 R115 560 5 I W O11 C 8501 1M 5 1 16v 041 C 8802 10K 5 18 030 C R807 4 3 5 8 038 C C111 2 24 10 C 058 0 05221 0 222 10V C 057 C D403 188355 095 c 10501 HD64F36077GHV 087 CNE PH SP Top 116 R 5 0 2 5 1 167 O25 C R810 680 5 1 16v 028 C C112 1000P 50 C OS3 C 523 0 1ulasviolosola Transistor B 150 1 lossi 024 030 5 close 7 on AX TX20 Ri17 68K 5 1 16W R504 10K 5 1 16 R611 1K 5 1 4v 10041 R811 2K 5 1 16v 035 C C113 0 047 55 g Hm 01 57 050 Model rait s Modol PH 12P Top 19 01 R118 7 5K 2 1 16v 021 R505 10 5 I 16 930 R812 39 5 1 8W 013 C114 2206 251 9066 R Us 1215 aie 2 Synbo CNT PA 6P Top 121 H 5 R119 8 8k 2 1 16v 022 C R506 10K 5 1 16v 030 C R621 1K 5 1 16v 033 C R813 39 5 1 8 913 C Q111 28J518 078 LD201 siR 332YC3F 8133 H 10321 450 1 7 5 4 1808 025 CN8 125 R507 108 5 11555 c R631 1K 5 1 v 012 C 08211155355 09510 10711 ULN2003ANS 090 0 4 ARE 0 1g
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97. T SHOWN IN FIGURE MUST BE LESS THAN 10V 900 NOT TOUCH THE OTHER COMPONENTS WHEN OPERATINGTHE SERVICE SWITCH SERVICEOPERATION ROCEDURE OF REFRIGERANT PUMP OWN OR INDEPENDENT OPERATION OF OUTDOOR UNIT CUT OFF THE POWER SOURCE ONCE THEN ON AGAIN 2 WA MINUTE AT LEAST 3 PRESS THE SERVICE SWITCH WHICH 18 ON THE PWB MORE THAN 1 SECOND SERVICE OPERATION WILL BE TO STOP THIS OPERATION PRESS THE SERVICE SWITCH AGAIN MORE THAN 1 SECOND 0 RESUME TO NORMAL OPERATION CUT THE POWER SOUCE ONCE THEN TO PROTECT THE DAMAGE ESSOR DO NOT OPERATE 5 MINUTES WITH SERVICE VALVE CLOSE o o o 20 SELF DIAGNOSIS LIGHTING MODE B LIGHT A BLINK LJ OFF DETAILS MAIN CHECK POINT 1 DURING OPERATION 10303 RED LIGHTS W SEMREEESOR nov watrunction 5 3 52 ting THIS SHOWS AN OVERLOAD Rotation speen 1s 0VERLOAD PROTECTION 2 AUTOMATICALLY CONT STATUS ROLLED TO PROTECT THE COMPRESSOR IN THE NOT MALFUNCTION OVERLOAD CONDITION 2 DURING STOP 10111 RED GOES OFF 1 NOT MALFUNCTION nir MICROPROCESSOR WAS LJ RESET REBOOTED IT 18 NoRMAL OPOWER W B STOP WHEN POWER SW HAS W B E TURNED ON y m PE
98. TARTMC 90 Seconds DWNRATEW 80 DWNRATEC 60 SHIFTW 2 000 SHIFTC 1 33 C CLMXTP 30 00 C YNEOF 25 00 C TEION 5 00 C TEIOF 9 00 C SFTDSW 1 00 C DFTIM1 43 Minutes DFTIM2 60 Minutes 24 Table 1 Thermo judgment Item Room Thermo judgment ON Basic Cooling Operation temperature Thermo judgment OFF Outdoor Thermo judgment ON CLMXTP N temperature Thermo judgment OFF Temperature set for cooling and dehumidifying value set by remote control 5 Bom Table 2 Compressor speed Cool dashed Calculated Temperature Fan speed set to auto compressor speed difference 35FH6 with shift value Start Stop button tart F start in 1 2500 1 66 C 1 LLLI Thermo judgment Thermo OFF 2900 min 2 00 G 5841 3300 2 33 Hi 2 66 fan Med 4100 Lo Silent 4500 min Ultra Lo Air conditioner runs at the set fan speed other than when fan speed is se to Auto 1 4800 min Room temperature ATCMAX Operation Max CMAX Rating CSTD Compressor speed Outdoor fan Reversing valve Cooling ON mode 2min 30sec 2min 30sec Notes 1 Condition for entering into Cool Dashed mode When fan set to Hi or Auto mode and temperature di
99. V 330000 5V 28105 12V 6208 e Microcomputer 5 104 8 io 5 R283 olsa 6 SFAN 1d L T p ee i i T JA V FMCHOP ovi R298 418 80 INPUT This model uses DC Fan Motor which has a controller circuit built in the Motor This DC Fan Motor will rotate by control voltage apply to Vsp input Voltage range 1 7 to 7V DC 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 5 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 5 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 ti
100. age at pin resets the microcomputer and Hi activates the microcomputer When power ON 5V voltage rises and reaches 4 4V pin of IC521 is set to Hi At this time the microcomputer starts operation When power OFF voltage drops and reaches 4 2V pin of IC521 is set to Low This will RESET the microcomputer 2 Receiver Circuit 12V 3 RECEIVER P Microcomputer Fig 2 1 IRR light receiver unit receives the infrared signal from the wireless remote controller The receiver amplifies and shapes the signal and outputs it 3 Buzzer Circuit ay R721 62821 Microcomputer IC711 Buzzer output 30 18 Fig 3 1 Buzzer circuit 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 Metal diaphragm Pizoelectric element applied to the buzzer The piezoelectric element in the buzzer oscillates to generate the buzzer s GT N U sound TA lt v Sound wave N ja nn Fig 3 2 Buzzer Operation When the buzzer sounds an approx 3 9kHz 31 4 Auto Sweep Motor Circuit 12V Auto sweep motor for CN4 horizontal air defectors 178 o Microcomputer 10 11 12 o 13 O Fig 4 1 Fig 4 1 shows the Auto sweep m
101. agnosis display of outdoor 41 4 times unit electrical components unit However when error is detected 8 times within two hours only for outdoor thermistor Room thermistor or heat exchanger 1 Room thermistor E is fault E 2 Heat exchanger thermistor 5 EA 9 times en room thermistor or heat exchanger thermistor is opened circuit or short circuit Over current detection at the DC fan 1 Indoor fan locked E motor 2 Indoor fan motor 6 BE 10 times when over current is detected at the 3 Indoor control P W B DC fan motor of the indoor unit 401 or 12402 data reading error 401 or IC402 abnormal 7 8 HM H gt lt 13 times When data read from IC401 or IC402 is incorrect Lights for 0 35 sec at interval of 0 35 sec lt Cautions gt 1 If the interface circuit is faulty when power is supplied the self diagnosis display will not be displayed 2 If the indoor unit does not operate at all check if the connecting cable is connected to the outdoor unit 3 To check operation again when the timer lamp is blinking you can use the remote control for operation except for mode mark 5 1 66 SELF DIAGNOSIS LIGHTING MODE MODEL RAC 35YH6 IPM INTELLIGENT POWER MODULE DANGER DC350V OCUT THE POWER SOURCE AND WAIT MORE THAN 10 MINUTES BEFORE SERVICE WORK OCONFIRM THE DC VOLTAGE AT THE MEASURING POIN
102. ansion valve starts initial operation for 5 to 10 seconds During the initial operation measure each pin of the CN15 to with a multimeter If no change is found around 0 9 V or 12V in this step the expansion valve or the micro computer has failure The logic waveform during the operating of the expansion valve is shown in Fig 9 2 Pin No 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 4 3 2 1 VALVE OPEN Fig 9 2 55 10 Outdoor DC Fan Motor control circuit Motor coil RC Filter pu L POWER P W 8 MAIN P W BO 14893 PEN 0101 mE 2 2 942 15V gt a N E 804 E aa ODE d 2 a EE RAN ED R107 Voc gt 53 ig PWM control voltage i Vsp 15 778 pulse age ses 2 m 8108 oa E XH 7P 107 2 joo as 11 Control Board LR Ap Wo EN 0101 da DC fan motor wilh control board 15 0
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104. cator 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 C 1 Connect the large dia pipe side and small dia pipe side service valve using a pipe 5 Connect the small diameter service Charge refrigerant of 300g after vacuuming lt 1 RC Outdoor unit value and the large diameter service 1 Compressor N Large dia service valve valve using the reducing union and copper pipe as shown on the right valve Reducing union 2 8 and 3 8 IE I _ Copper pipe 2 8 1 Small diameter service valve gt Parts to be prepared h 1 Reducing union 2 8 6 35 mm 3 8 9 52 mm 2 Copper pipe 2 8 and 3 8 N 2 Do not operate for more than 5 minutes 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 normal operation 85 IPM Intelligent Power Module DIAGNOSIS SSM1001MA Circuit diagram of O Collector the device Emitter
105. 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 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 69 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 2 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 U V U w U 5V V Drive signal at point Drive signal at point O Fig 4 6 46 5 Power Circuit for P W
106. e the noise filter circuit won t operate properly SA1 and VS1 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 37 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 superimposes 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 reguest signal SDO to indoor microcomputer 38 KHz of carrier signal is generated and modulated by the request signal SDO from the outdoor microcomputer This signal is superimposed to DC 35V line via C801 and L801 To preve
107. e fan speed mode is changed Sleep Lo 4 When defrosting is to be set during sleep oepration defrosting is engaged and sleep operation is restored after defrosting 5 If sleep operation is cancelled by the cancel button or sleep button all data is cleared Compressor speed Notes Setting Defrosting Inhibit Period DFTIM2 Time d Kun DFTIM1 5 C Outdoor temperature Notes 1 The time is set according to the outdoor temperature when it is between 0 and 5 2 DFTIM1 is used when the outdoor temperature 2 0 C 3 DFTIM2 is used when the outdoor temperature 5 C 28 REFRIGERATING CYCLE DIAGRAM MODEL RAS 35FH6 RAC 35YH6 COOLING DEHUMIDIFYING DEFROSTING 9 52 Silencer 8 0 OUTDOOR UNIT INDOOR UNIT 68 0 rg ms Reversing valve U 29 52 Silencer 7 9 52 lt gt Service valve i 3 8 Single ended union 9 52 3 8 g9 52 COMPRESSOR 9 52 Charge port 1 2 Electric Expansion valve 96 35 Service valve Single ended 1 4 union 2935 1 4 66 35 Strainer g S
108. e lower arm DC VOLTAGE R004 R003 PK3P 14 DETECTIVE RESISTOR R906 R905 Id DETECTIVE CIRCUIT gt ko o 1 o Se korno M io ls pe C918 200719010800 15 0 0501 9501 R513 R514 0 0502 IP limiter lo je lt Micro Computer Fig 4 1 Intelligent power module circuit U is ON V is ON 43 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 is ON circuit in Fig 4 1 At point U is chopped OFF is ON circuit in Fig 4 4 vt wt Upper arm gt Lower arm b V W Fig 4 2 Switching order of power module Upper arm transistor is controlled to ON OFF by 4 8kHz chopper signal Rotation speed ofthe 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 N 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 transistor ON Voltage at
109. eeds 195914 eui jo 5 133115 E sies peeds ue jeu desis Buung AOU sexe Jaw 99915 SI 19111 44O NO Ou lluA 5 si 43375 81461 1 y jo pue si WAYUOD 1101 jeuDis e jun ssejun SI euin 195 BUI J ue e JOU eui u q seu ueuM NOILV43dO YAINIL AJJIS INIWIN VYDOHYd YAINIL YUM Bune u jo p ds ue suun 8 E MOT 19Mo Ajjoedeo suaiun y s6umas 1N31IS E E si O nv JO esn pereeu si uoo ay Jaye 19191nb uomnejedo o JUeM JO peeds Buunp pjoo 99 101 ou Jojeorpul 10 09 Sun eu Bune u Buung SOINUILU 10 a1e19do jou 3y YEU OS eui 19 uoneJedo SI lun eui uolinq pahejdsip
110. eeu 104 eui x si ejoKo eui ees 0 2945 x UNDO JOISIWISU au UI sued S A lewiou OU S S A s 9A SO SOK peeds SYUIJA ON SAUIJA LOE ON INO S SAUIJA 10501 SOSI 10ISIUUDSU y 18 21N 819dW9 941 9 SAUIJA LOE 81 siolo uuoo ains eui woad xoidde s jo D AjeuuoN ewou 19891 eun S eui 1 eoejdeu ewou Ndl Jewod 1 981 6 S hey ejeorpui SIUN p llddns si amod Jaye 15 sdols pue 51959 jun ay ISASMOH dois 195 SAUNA 10641
111. fference between indoor temperature and set temperature has a corresponding compressor speed 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 C 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 C 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 speed CMAX will maintain for 60 minutes if indoor temperature is lower than CLM XTP No time constrain if indoor temperature is higher than CLMXTP When fan speed setting on remote control is 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 speed will be limited to CKYMAX When fan is set to Med compressor speed will be limited to CJKMAX When fan is set to Lo compressor speed will be limited to CBEMAX When fan is set to Silent compressor speed will be limited to CSZMAX During Cool Dashed when room temperature reaches set temperature 1 C compressor speed is actual speed x DWNRATEC 25
112. gt On On gt Off timer Start stop button Reserve button Cancel button Operation lamp Timer lamp Timer memory OFF ON OFF Off gt On timer On gt Off timer On gt Off timer Off gt On timer during operation during stop Changes from Hi to Med or Lo depending on room Set to ultra Lo Lo Med Hi ultra Hi or stop depending on the room temperature time and heat exchange temperature Set to stop if the room temperature is 18 C in the 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 16 C Restricted to heating 2 Judging by room temperature Operating mode at start up is judged initial judgment a 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
113. he rotation speed control When the voltage at pin 60 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 Rotation speed Fig 6 4 50 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 voltage is high Since the load level is indicated by the DC voltage multiplied by DC current R247 R248 R249 are provided to perform the same overload judgement even when the voltage varies DC voltage Low DC current High DC voltage 260V DC current DC voltage High DC current Low 0 Rotation speed Fig 6 5 3 Start current control It is required to maintain the start current DC current constant to smooth the start of the DC motor of the compressor RAC 35YH6 uses software to control the start current The start current varies when the supply voltage varies This control method copes with variations in the voltages as follows 1 Turns on the power module s U 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 U transistor according to the DC voltage level and the start is controlled so the start current is approx 10A DC current
114. hermistor 1 8 R304 Z C304 62 Pi 5V R301 DEF thermist u jj CN9 1 OV R305 2 9 63 DEF C303 5V R302 Outdoor temperature OV thermistor CN10 7 U1 R306 64 Outdoor NEZ N temperature 2 R303 Y G30 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 Athermistor 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 62 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 63 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
115. hod 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 temperature 2 C 2 C Change to heating 2 C Continue cooling 3 Change to cooling t 3 C Continue heating Cooling Heating final preset temperature 3 C 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 26 Same as at left See page 26 Same as at left See page 28 Same as at left Performs the sleep operation of each operation mode 23 Table 1 Mode data file RAS 35FH6 LABEL NAME VALUE WMAX 5200 WMAX2 5200 min WSTD 5050 min WJKMAX 4200 min WBEMAX 3800 min WSZMAX 3800 min CMAX 4800 min CSTD 4300 CKYMAX 4200 min CJKMAX 3400 min CBEMAX 2700 min CSZMAX 2500 min WMIN 2500 min CMIN 2500 min S
116. lacing any P W B disconnect all the cables including ground wires A Main P W B 1 Remove four screws securing the control 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 control P W B from the cooling fins the arrow as shown in Fig A Direction of the main P W B removal B Power P W B 1 Open the support latches and raise the P to power P W B in the direction of the arrow as p IEEE shown in Fig A lt Direction of the power P W B removal gt vw etu Bf ili En a _ dx O i LS i Open these support latches to remove the main P W B Fig A 74 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 75 5 95 BY ees 10287 dure sisouDeip jjes y pip MOH U91IANS 9IAJ8S 1 eui Buisn y HUN 615490 9 seui pue y
117. le 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 Microcomputer EEPROM Motor current ID Y 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 49 IPM Detection t IN Resistor lt Direct Current a m 2 Power P W B et R513 906 Pa al 8 o gt Microcomputer WE 9 Vd x E ov SO Tp 5V 6 N N lt 7 FH R248 2 51 69 1 5 104 TS amp 18 Oye 5V E ov 8 CN4B CN4A R222 1 316 Is nan 005 A o o N NT 5 5 e a R287 0208 12 5 1
118. mes Fan Motor lock detected R107 and IC4 are used for Fan Motor over current 56 lt Reference gt When operation stop with LD301 blinks 12 times it may be caused by faulty DC fan motor In this case please check CN6 and CN12 connection first It makes Fan Motor Lock also if those connectors are in misconnection DC Fan Motor has broken invites 1 Fuse burned Please replace 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 57 SERVICE CALL Q Model RAS 35FH6 RAC 35YH6 COOLING MODE The compressor has stopped suddenly during cooling operation Fan speed is not switched over during dehumidifying operation
119. minal of the unit The insulation resistance should be 1 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 and 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 reinforced or at a new location Any inflammable thing should never be placed about the location of installation 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 manufacturers during maintenance and handling thereof They apply the same to handling of abnormal goods such as rejected goods being returned Object parts 1 Micro computer 2 Integrated circuits IC 3 Field effect transistors FET 4 P C boards or the like on which the parts mentioned in 1 and 2 of this paragraph are eguipped Items to be observed in handling 1 Use a conductive container for carrying and storing of parts Even rejected goods should be handled in the same way A conductive polyvinyl bag IC 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 b
120. n the indoor unit terminal board Yes Is the control voltage being generated normally 12V line 12V or 7V Is AC220 230V being generated at AC outlet Yes No 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 Yes Is DC35V is being generated between terminals C and D on the outdoor unit terminal board No Are C and D connection cables reversed No repair any defective part Yes Check the indoor outdoor unit connection cable and correct any defective section wrong connection incomplete insertion Yes Connect the cables correctly Check the outdoor unit power circuit and repair any defective part Check according to the proper method for checking the power circuit 5V line 5V Yes Yes Do the air deflectors perform initial operation when the power supply is turned on after off No No gt Check wireless light receiving unit Is the microcomputer reset input pin Hi Check the reset circuit and repair any defective section Yes Is the microcomputer clock signal Replace the
121. nders near by it is recommend to stop the operation and to disconnect the power cord plug from the power outlet for safety 3 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 a 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 1 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 C 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 that at this time fan stops and the vapour may rise from the outside heat exchanger SPECIFICATIONS MODEL RAS 35FH6 RAC 35YH6 FAN MOTOR PWM DC35V 40 W FAN MOTOR CAPACITOR NO NO FAN MOTOR PROTECTOR NO NO
122. nt 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 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 69 and amplifies by Q801 I F signal approx 38 kHz is generated by comparator then modulated by the signal from pin 60 of 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 38 Fig 3 1 shows the interface circuit used for the indoor and outdoor microcomputers to communicate with each other
123. ody 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 b 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 P d Clip for connection with 1MQ grounding wire Fig 2 Body Earth 6 Use three wire type soldering iron including grounding wire Metal plate of aluminium stainless steel etc a Working table 5 Resistor of 1 1 2W je Earth wire Bare copper wire for body earth 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 soldering iron Use a high insulation mode 100V 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 shortcircuit a load circuit or the like A 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 thu
124. of the compressor are 3 minutes Dehumidifying Sleep Operation Cooling Defrost ER 1hr Set to 7 hours Fu TEIOF Sleep button U I Tndoor heat exchange temperature Operation lamp TEION Timer lamp Remote control Sleep ON Indoor fan Hi Cooling defrost signal See operation Hi gt See basic operation Indoor fan Med See basic operation Sleep Lo Lo Silent Outdoor fan 15sec Outdoor fan Horizontal Shut air deflector Horizontal Reversing valve Facing down cooling on model Compressor speed Balance period 3min 1min CMINHI UE SDMAX or SDRPM Notes 1 The sleep operation starts when the sleep button is pressed 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 Table 3 Compressor speed Basic Heating Operation Calculated Temperature compressor speed difference 35FH6 with shift value 2500 min 1 66 C 2900 min 2 00 C 3300 min 2 33 Heating set temperature remote control set temperature Fan speed set to auto Start Stop button Thermo OFF Thermo judgment Thermo Defrost signal _
125. otor drive circuit the signals shown in Fig 4 2 are output from pin 43 08 of microcomputer Micro computer pins Step width 10ms Horizontal air deflectors 1 2 3 4 2 p 8 HE Fig 4 2 Microcomputer Output Signals 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 deflectors Table 4 1 Auto sweep Motor Rotation Rotation angle per step Time per step ms Horizontal air deflectors 0 0882 32 5 Initial Setting Circuit IC401 When power is supplied the microcomputer reads the data in IC401 IC402 E7PROM and sets the preheating activation value and the rating and maximum speed of the compressor etc to their initial values Data self diagnosis mode is stored in IC401 or 402 data will not be erased even when power is turned off 5V 5V 8 C401 S 3 Microcomputer tc tc 4 5 lt External ROM 26 SDA IC401 or IC402 E PROM OV Fig 5 1 6 Power Supply 12V 102 THERMAL FUSE 35V Built in ri Si CN10 terminal board 6 Indoor TS 9 Fan Motor Kuut 1 2 9 1 JW101 ziz 3 sij 4 Oja 1 S 4 B
126. otor for Overheat thermistor gt E gt Relay drive circuit gt 5 Air deflector 5 RAC Adaptor lt 8 5 Defrost thermistor gt E Wired Remote Control 5 Outdoor temperature thermistor gt Electric expansion valve 1 Temporary switch gt Indoor Outdoor Indoor Outdoor gt lt interface circuit interface circuit N Reversing valve ENS LEM control circuit Initial setting circuit gt gt DC fan motor drive Reversing valve coil lt amp circuit Reset circuit Indoor DC Reset 5 Microcomputer clock fan motor circuit circuit DESSY 22 BASIC MODE MODEL RAS 35FH6 Basic operation of start stop button Fan Dehumidifying dehumiditying operation by the function select button only not including that engaged by the dehumidify button Start stop button Start Stop Start Stop Operation lamp auto Off timer Start stop button Reserve button Cancel button Operation lami Timer lamp Timer memory i 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 wa a operation Off
127. out and 0111 failure When checking the switching waveform of the 0111 set the source to the base and measure the gate and drain O 4 During power feeding to the P W B do not remove and insert the CN10 fan motor connector Failure to do so may cause overcurrent to the fan motor and P W B s micro computer IC and the like and a failure may occur To remove or insert the CN10 be sure to shut off the power 64 THE SUPPORT FUNCTION FAILURE DIAGNOSIS No Function Name Description Self diagnosis indication function lt lndicating a failure on the indoor unit side gt lt lndicating a failure on the outdoor unit side gt The timer lamp indicates a mode of failure detected on the indoor or outdoor unit side by blinking frequency A failure detected on the outdoor unit side will be indicated by the timer lamp blinking 4 times after a retry operation has been performed several times Note In some failure modes only the retry operation is repeated without lamp indication lt Failure modes that will repeat a retry operation without the indoor unit lamp indication are as follows gt OH thermistor temperature rise Outdoor unit communication error Power voltage abnormal Less frequent defects LD301 indicates a mode of failure detected on the outdoor unit side by blinking freguency Upon failure detection the outdoor unit will shut down and the LD301 continue
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129. rdless of Same as at left Set to ultra Lo Lo Med or stop depending on the room temperature and time Set to the room temperature stop if the room temperature is 18 C in the ultra Lo mode other than during preseating cooling is recovered at 18 33 C Lo Operates at Lo regardless of the Same as at left Set to Lo in modes other than when the Set to ultra Lo Lo or stop depending on the room temperature and time Set to stop if room temperature compressor stops the room temperature is 18 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 Heat exchanger temperature Silent Operates at Silent regardless of Same as at left Set to Silent in modes other than when KAFON theroom temperature the compressor stops KAFOF Med with overload Lo Basic operation of temperature controller ion at the the room Performs only fan opera set speed regardless of temperature starvstop button eration lami Hi Med s D 10 Hi Med Lo See page 25 See page 26 See page 27 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 met
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131. riterion 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 1 Afuse for blow out in this step Main P W B error Remove the CN3 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 CN3 and CN4 and meaure the voltage If the voltage is correct check the main P W B 48 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 diagram on overload judgement values There are two types of control which has named IS OVL and ID OVL IS OVL is limiting the who
132. s the current time past the preset time When the preset time reaches the current time it disappears 59 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 temperature 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 C 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 is sensed in the auto speed mode When the temperature is low the fan speed varies among high air flow low air flow and breeze 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 mode Heating operation Loud noise from the outdoor unit is heard when operation is started Noise from the outdoor unit occa
133. s to blink until the unit is reset In the event of communication errors the LD301 continues to blink until communication is restored 65 TROUBLESHOOTING WHEN TIMER LAMP BLINKS Model RAS 35FH6 Perform troubleshooting according to the number of times the indoor timer lamp and outdoor LD301 blink SELF DIAGNOSIS LIGHTING MODE Model RAS 35FH6 1 Blinking of Timer lamp Reason for indication Possible cause Reversing valve defective 1 R eversing valve defective 1 2 Heat exchanger thermistor 1 tim e T osa disconnected 999 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 2 E operation Ti A COME ees 2 times When the outdoor unit is in forced operation or balancing operation after forced operation Indoor outdoor interface defective 1 Indoor interface circuit 3 HHH 3 times When the interface signal from the 2 Outdoor interface circuit outdoor unit is interrupted Outdoor unit electrical components Outdoor unit electrical components defetive For details operate again using When the same error mode is detected remote comtroller and check from 8 times within 30 minutes from outdoor self di
134. sionally changes There is a difference between the set temperature and room temperature Air does not flow immediately after operation is started 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 according 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 TROUBLE SHOOTING RAC 35YH6 PRECAUTIONS FOR CHECKING Indoor Controller Outdoor Controller Power Switch P Point motor N WARNING utm OV line Remember that voltage of 175 V is applied to the OV line on the P W B or the a like as shown in the right diagram Voltage at point 7 N 7 Ground voltage N 7 N 176 2 Point OV line Always keep your hands and metallic things away AN W
135. sonance using the L2 and C023 By combining the 11 and l2 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 l ls AX EN C023 L2 12 Fig 2 2 Fig 2 3 36 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 it is 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 DB1 and C41 The DB1 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 39 lt XZ Z 9 Eg n 6001 to C003 6011 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 Otherwis
136. ssor operates it is about 280 V mi c M A T EE ae samaan TERMINAL 803 BOARD FUSE L101 S i I 256 BLACK 5 TT RUT m BLUE LJ 5 1001 ad 8007 RL2 sacha Lo UN m L2 0023 e SA TABOS6i gt 8 i i 5 WHITE 804 i __ CTI 6 RED E GREEN1 i 1 v TO MICROCOMPUTER a Voy PURPLE a GREENS ORANGE 1005 1002 5 TAB02 SWITCHING i 60126007 POWER SUPPLY 6018 C008 Fig 2 1 Main parts The DB2 rectifies the AC voltage The possible causes for the DB2 failure are as follows The 15 A fuse may be blown out or the IPM for the main P W B may have a failure In such a case check the 15 fuse for blowout and replace the main P W B if necessary DB3 L1 C023 and L2 The 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 I2 as shown in Fig 2 2 1 becomes an input current to the capacitor which peak value was crushed by the L1 and 12 becomes a resonance current which causes the LC re
137. tdoor unit is still working with the OPERATION lamp lighting Fan speed does not change when fan speed selector is changed during auto operation When on timer has been programmed operation starts before the preset time has been reached Does Nice temperature reservation function operate during dehumidifying Even if the same time is preset the operation start time varies Timer cannot be set Auto Fresh Defrosting is carried out the system checks the outdoor heat exchanger and defrosts it as necessary before stopping operation At this point fan speed is automatic This is because Nice temperature reservation 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 It does not work It works only during cooling 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 Has the clock been set Timer cannot be set unless the clock has been set 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 current time display The timer has been programmed but the preset time disappears I
138. trainer 6 35 J HEATING 9 52 8 0 Silencer 8 0 OUTDOOR UNIT INDOOR UNIT D Reversing valve Service valve I Single ended union 3 8 6 6952 9 52 COMPRESSOR Charge port io 49 52 29 52 Silencer MS 9 52 S gt Electric Expansion valve Single ended 6 35 Service valve 1 4 umon 6 35 1 4 6 35 Strainer 8 Strainer 6 35 9 29 DESCRIPTION OF MAIN CIRCUIT OPERATION MODEL RAS 35FH6 1 Reset Circuit NORMAL HI RESET LO 7 RES Microcomputer g 2 R552 ET L N IB 5 5 522 Fig 1 1 Power Power ON Voltage K K Voltage supply to pin 2 of IC521 Reset release at 4 4V Reset enter at 4 2V Voltage Voltage at pin 7 50 of microcomputer Fig 1 2 The reset circuit initializes the microcomputer program when power is ON or OFF Low volt
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140. ul Jes 5 peeds ue uaum QO uoneJedo dois 95614 d q uey dOLS LHVLS 991 55914 queis LN31lS inb aow 195 aan IH q33dS NV3 amp eui 9961 SOILIIPUI AEJASIP yeu os 10199j9S NOILONNA 94 999444 JO pue y 18 1oopul eui JO BU AIP UONDUNJ SIU esf Jo1e noJro ue SE A AWIS eui esn ULI NOI LV43AO BWIN qO1S LHVLS O eui 55914 Ajuo ja N 1 1 y UI UI 81015 sDumoes SY 1100 Juano eui eui 195 NOA 58 uoos 5611615 uonouny ay L 61 3 O eui WOO jueuno y ugy JeuBiu si eui 1215 Jou seop uonounj eu dois eui 899444 deeq spejs BuilooS dOLS 1HVLS O eui 401s 15 suonipuoo uo Wood Enjoe y
141. yoyms 1 1 9 81 100puj swoo1 Jepee 100pino Sugg g 2896 8 sug 5000 2 2 9 si pue 50 S iooplno y 9 ejdurex3 SWIOJONEM 5990104005 19561 191NdW000191W 100pino 4008 1 2 0 ON 18 9 swooL sw001 xodde 0 1 19581 9 JOOPUI DIH 100PINO J Buunp jenos 41 Serial Communications Data 1 Outdoor message Fan 7 step request 1 Actual compressor rotation Actual compressor rotation Actual compressor rotation Actual compressor rotation Actual compressor rotation Actual compressor rotation 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 Outside temperature 3 1 temperature 0 LSB Self diagnosis 3 MSB Self diagnosis 2 Self diagnosis

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