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Hitachi Summit RAC-50YH5, Руководство по обслуживанию

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Содержание Summit RAC-50YH5

Страница 1: ...0FH5 REFER TO THE FOUNDATION MANUAL SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT ROOM AIR CONDITIONER FEBRUARY 2007 Refrigeration Air Conditioning Division INDOOR UNIT OUTDOOR UNIT RAC 50YH5 W A kW B T U h W A kW B T U h W H D kg RAS 50FH5 RAC 50YH5 DC INVERTER WALL TYPE TYPE MODEL POWER SOURCE TOTAL INPUT TOTAL AMPERES CAPACITY TOTAL INPUT TOTAL AMPERES CAPACITY DIMENSIONS mm NE...

Страница 2: ...6 Tools and measuring instruments for use in repairs or inspection should be accurately calibrated in advance 7 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 8 To check the insulation of the unit measure the insulation resistance between the power cord plug and gr...

Страница 3: ...arts Even rejected goods should be handled in the same way 2 When any part is handled uncovered in counting packing and the like the handling person must always use himself as a body earth Make yourself a body earth by passing 1MΩ 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 ...

Страница 4: ...g iron including a grounding wire Use a high insulation mode 100V 10MΩ 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 Soldering iron Grounding wire Screw stop at the screwed part using a rag plate Fig 4 Grounding a solder iron ...

Страница 5: ...casion that the cooling and heating operation does not start for 3 minutes it is not abnormal and this is the result of the operation of IC delay circuit This IC delay circuit ensures that there is no danger of blowing fuse or damaging parts even if operation is restarted accidentally 5 This room air conditioner should not be used at the cooling operation when the outside temperature is below 10 C...

Страница 6: ... SWITCH TEMPORARY SWITCH SERVICE SWITCH TRANSFORMER VARISTOR NOISE SUPPRESSOR THERMOSTAT REMOTE CONTROL SWITCH LIQUID CRYSTAL RAS 50FH5 35W NO NO NO NO NO NO NO NO YES NO NO NO NO YES IC YES 40 W NO NO NO YES YES 3 0A G4A NO NO YES NO 450NR YES YES IC NO 1400g WITHOUT REFRIGERANT BECAUSE COUPLING IS FLARE TYPE UNIT PIPES MAX 20m REFRIGERANT CHARGING VOLUME Refrigerant 410A RAC 50YH5 JU1013D ...

Страница 7: ...o left Don t form the piping downward at the left of the unit The difference in height between the indoor and outdoor unit should be kept max 10m The connecting pipe no matter big or small should all be insulated with insulation pipe and then wrapped with vinyl tape The insulator will deteriorate if it is not wrapped with tape The connection of insulated drain hose Please use insulated drain hose ...

Страница 8: ...anger of electric shock exists Do not install near location where there is flammable gas The outdoor unit may catch fire if flammable gas leaks around it Please ensure smooth flow of water when installing the drain hose CAUTION PRECAUTIONS DURING SHIFTING OR MAINTENANCE PRECAUTIONS DURING OPERATION Avoid an extended period of direct air flow for your health W A R N I N G Should abnormal situation ...

Страница 9: ...e amount of heat in the room is above the cooling or heating capability of the unit for example more people entering the room using heating equipments and etc the preset room temperature cannot be achieved This is not intended for use by young children or infirm persons unless they have been adequately supervised by a responsible person to ensure that they can use the appliance safely Young childr...

Страница 10: ...g the operating condition Refer page 9 Horizontal deflector Vertical deflector Air Outlet Refer page 20 Remote controller Send out operation signal to the indoor unit So as to operate the whole unit Refer page 10 WIDTH mm 780 850 MODEL RAS 50FH5 RAC 50YH5 HEIGHT mm 280 650 DEPTH mm 220 298 MODEL NAME AND DIMENSIONS OUTDOOR UNIT DRAIN PIPE Condensed water drain to outside CONNECTING CORD AIR INLET ...

Страница 11: ...about once every one hour when frost forms on the heat exchanger of the outdoor unit for 5 10 minutes each time TIMER LAMP This lamp lights when the timer is working TEMPORARY SWITCH TEMPORARY SWITCH Press Temporary Switch Non conductor Stick TEMPORARY SWITCH Use this switch to start and stop when the remote controller does not work Use non conductor stick example toothpick By pressing the tempora...

Страница 12: ...PERATURE buttons Use these buttons to raise or lower the temperature setting Keep pressed and the value will change more quickly TIME button Use this button to set and check the time and date RESET buttons FUNCTION selector Use this button to select the operating mode Every time you press it the mode will change from AUTO to HEAT to DEHUMIDIFY to COOL and to FAN cyclically FAN SPEED selector This ...

Страница 13: ...th a beep Press the button again to stop operation You can raise or lower the temperature setting as necessary by maximum of 3 C Press the temperature button and the temperature setting will change by 1 C each time The preset temperature and the actual room temperature may vary somewhat depending on conditions The display does not indicate the preset temperature in the AUTO mode If you change the ...

Страница 14: ...ed is HI at first and varies to MED or LOW automatically when the preset temperature has been reached HI Economical as the room will become warm quickly But you may feel a chill at the beginning MED Fan speed slow LOW Fan speed slower Set the desired room temperature with the TEMPERATURE buttons the display indicates the setting The temperature setting and the actual room temperature may vary some...

Страница 15: ...temperature setting The function will stop the indoor unit will stop emitting air as soon as the room temperature becomes lower than the setting temperature Set the desired room temperature with the TEMPERATURE button the display indicates the setting The range of 20 26 C is recommended as the room temperature for dehumidifying Press the START STOP button Dehumidifying operation starts with a beep...

Страница 16: ...ED Fan speed slow LOW Fan speed slower Set the desired room temperature with the TEMPERATURE button the display indicates the setting The temperature setting and the actual room temperature may vary some how depending on conditions Press the START STOP button Cooling operation starts with a beep Press the button again to stop operation The cooling function does not start if the temperature setting...

Страница 17: ...re and setting temperature is large fan starts to run at HI speed After room temperature reaches the preset temperature the cooling operation which changes the fan speed and room temperature to obtain optimum conditions for natural healthful cooling will be performed For the cooling operation FAN OPERATION You can use the device simply as an air circulator Use this function to dry the interior of ...

Страница 18: ...EL button The RESERVED sign goes out with a beep and the TIMER lamp turns off on the indoor unit 1 Set the current month and day with the TIMER control button 1 Press the OFF TIMER button The OFF mark blinks on the display 1 Press the ON TIMER button the ON mark blinks on the display 2 Set the turn off time with the TIMER control button Press the RESERVE button 3 Press the ON TIMER button so that ...

Страница 19: ...th the TIMER control button The setting of turn off time is now complete Example The device will turn off at 11 00p m Example The device will turn on at 7 00 a m The setting of the turn on time is now complete 4Set the turn on time with the TIMER control button 5 Point the signal window of the remote controller toward the indoor unit and press the RESERVE button The ON mark starts lighting instead...

Страница 20: ...ller The TIMER lamp lights with a beep from the indoor unit When the sleep timer has been set the display indicates the turn off time Example If you set 3 hours sleep time at 11 38 p m the turn off time is 2 38 a m 2 Press the SLEEP button and set the sleep timer The device will be turned off by the sleep timer and turned on by on timer How to Cancel Reservation Point the signal window of the remo...

Страница 21: ...sleep timer can not be set If you set the sleep timer after the off on off or off on timer has been set the sleep timer becomes effective instead of the off on off or off on timer set earlier You can not set other timer during sleep timer operation After sleep timer time is up and when press sleep button again the sleep timer will be set as last setting Sleep timer effective only once NOTE ...

Страница 22: ...ge shown on the right When the operation is stopped the horizontal air deflector moves and stops at the position where the air outlet closes CAUTION In Cooling operation do not keep the horizontal air deflector swinging for a long time Some dew may form on the horizontal air deflector and dew may drop RESET Adjustment of the conditioned air in the upward and downward directions The horizontal air ...

Страница 23: ...e old batteries 2 Install the new batteries The direction of the batteries should match the marks in the case 1 Do not use new and old batteries or different kinds of batteries together 2 Take out the batteries when you do not use the remote controller for 2 or 3 months CAUTION Push and pull to the direction of arrow ...

Страница 24: ...with your wake up time in the morning This will enable you to enjoy a comfortable room temperature Please use the timer effectively Dusty air filter will reduce the air volume and the cooling efficiency To prevent from wasting electric energy please clean the filter every 2 weeks Please pay attention to the room temperature and air flow direction when operating the unit for baby children and old f...

Страница 25: ...e used for a long period of time please switch off the power from the mains If the power from mains remains ON the indoor unit still consumes about 8W in the operation control circuit even if it is in OFF mode Warning To protect the whole unit during lightning please stop operating the unit and remove the plug from the socket OFF Interference From Electrical Products Caution To avoid noise interfe...

Страница 26: ... filter as it may cause damage to the structure In case of removing the air cleansing filters please follow the above procedures The cooling capacity is slightly weakened and the cooling speed becomes slower when the air cleansing filters are used So set the fan speed to HIGH when using it in this condition Air cleansing filters are washable and reusable up to 20 times by using vacuum cleaner or w...

Страница 27: ...st air filter only rinse under running tap water and gently brush it with soft bristle brush Allow filters to dry in shade Re insert the air cleansing filter to the filter frame Set the filter with FRONT mark facing front and slot them into the original state After attaching the filters push the front panel at three arrow portions as shown in figure and close it Do not wash with hot water at more ...

Страница 28: ...ith both hands to detach and attach it CAUTION Do not splash or direct water to the body of the unit when cleaning it as this may cause short circuit Never use hot water above 40 C benzine gasoline acid thinner or a brush because they will damage the plastic surface and the coating Removing the Front Panel HITACHI DC INVERTER When the front panel is fully opened with both hands push the right arm ...

Страница 29: ...QUALIFIED SERVICE PERSONAL EITHER EVERY HALF YEARLY OR YEARLY CONTACT YOUR SALES AGENT OR SERVICE SHOP Is the earth line disconnected or broken Is the mounting frame seriously affected by rust and is the outdoor unit tilted or unstable Is the plug of power line firmly plugged into the socket Please ensure no loose contact between them Air Blow Cleaning and maintenance must be carried out only by q...

Страница 30: ...ng noise of refrigerant in the refrigerating cycle 2 Slight rubbing noise from the fan casing which is cooled and then gradually warmed as operation stops The odor will possibly be emitted from the room air conditioner because the various odor emitted by smoke foodstuffs cosmetics and so on sticks to it So the air filter and the evaporator regularly must be cleaned to reduce the odor Please contac...

Страница 31: ...ly Companies are to be observed Minimum Maximum Minimum Maximum Indoor Dry bulb C 21 32 20 27 Wet bulb C 15 23 12 19 Outdoor Dry bulb C 21 43 2 21 Wet bulb C 15 26 1 15 Note Avoid to use the room air conditioner for cooling operation when the outside temperature is below 21 C 70 F The recommended maximum and minimum operating temperatures of the hot and cold sides should be as below Cooling Heatin...

Страница 32: ... 30 CONSTRUCTION AND DIMENSIONAL DIAGRAM MODEL RAS 50FH5 INDOOR UNIT 47 5 60 205 220 ...

Страница 33: ...dle Air suction grille 104 64 26 850 955 79 650 96 169 5 638 10 10 10 320 340 Air outlet 340 20 22 298 201 Handle Holes for anchor bolt 2 12 Fixing hole 507 198 57 12 37 Notch for anchor bolt 2 12 Notchs More than More than More than 100 More than 700 100 100 Service space ...

Страница 34: ...ON 16 7 62 1 20 0 68 0 OFF 16 0 60 8 20 7 69 3 ON 24 7 76 5 28 0 82 4 OFF 24 0 75 2 28 7 83 7 ON 32 7 90 9 36 0 96 8 OFF 32 0 89 6 36 7 98 1 M RED BLK WHT YEL BLU 35V 5V 0V 0 5V FG MODEL RAS 50FH5 POWER SOURCE DC 5V 35V DC360V OUTPUT 25W 40W 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 RED 360V BLK 0V WHT 15V M...

Страница 35: ...0 C 68 F 75 C 167 F RESISTANCE VALUE CAUTION 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 2M 1 05 2M 1 28 U V W M M M WHITE YELLOW RED RAC 50YH5 JU1013D ...

Страница 36: ...HT CN15 WHT CN13 CN11 5 5 CN12 CN12 RED GRY 2A FUSE ICP RELAY R008 R007 3A FUSE 25A FUSE C006 R001 BLK GRN WHT WHT BRN RED BLK CONNECTING CORD BRN RED BLK BLK GRN RED BLK WHT YEL BLU POWER CIRCUIT TERMINAL BOARD GRN YEL L N C D SINGLE PHASE AC220 230V 50Hz GRN YEL THERE ARE SOME LEAD WIRES WHICH HAVE SPIRAL STRIPES WITH WHITE IN ADDITION TO THE ORIGINAL COLOR CN2 RED MAIN P W B REVERSING VALVE R00...

Страница 37: ...G40 P40 P41 P42 P43 P00 P01 P02 P03 P10 P11 P12 P13 D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 BEEP P20 P30 P31 NCVL C1 VL C2 VL C3 XC IN XC OUT VDD X OUT X IN RESET CARR P23 P22 P21 VSS IC 1 M3455OM6A 504FP LCD 1 C8 50v 1u K 1 D3 RB425D 1 2 K2K3 K4 K5 P10 P11 P12 K6 K7 K8 K9 K10 K11K12 K18 K17 K15 K16 K13 K14 D0 D1 D2 D3 R1 100k SW1 R2 P 100k R3 100k R4 100k R5 Q1 2SC3443 or 2SC2982 R6 R7 R9 D2 D1 D1 D2 EL 1L...

Страница 38: ...MODEL RAS 50FH5 CIRCUIT DIAGRAM 39 ...

Страница 39: ...CIRCUIT DIAGRAM MODEL RAC 50YH5 41 ...

Страница 40: ... 43 MODEL RAS 50FH5 MAIN P W B MARKING ON P W B PRINGTEDWIRING BORD LOCATION DIAGRAM COMPONENT SIDE SOLDERING SIDE ...

Страница 41: ... 44 MODEL RAS 50FH5 RECEIVING P W B MARKING ON P W B COMPONENT SIDE SOLDERING SIDE ...

Страница 42: ... 45 MODEL RAC 50YH5 MAIN P W B Marking on P W B E D I S T N E N O P M O C ...

Страница 43: ...thermistor Reset circuit Initial setting circuit Temporary switch Electric Expansion valve drive circuit Electric Expansion valve T 8 X A C I H r e t u p m o c o r c i m r o o d t u O Trip signal synthesis circuit L N RAS 50FH5 RAC 50YH5 SPM2 Power source 1 50Hz 230V Outdoor unit Terminal board 1 1 R 7 X A r e t u p m o c o r c i m r o o d n I ...

Страница 44: ...ling is recovered at 18 33 C Set to Òultra LoÓ ÒLoÓ or ÒstopÓ depending on the room temperature and time Set to ÒstopÓ if the room temperature is 18 C in the Òultra LoÓ 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 See page 55 Same as at left See page 57 Se...

Страница 45: ... 51 ...

Страница 46: ...m CMAX will maintain for 60 minutes if indoor temperature is lower than CLMXTP No time constrain if indoor temperature is higher than CLMXTP 6 When fan is set to ÒHiÓ compressor rpm will be limited to CKYMAX 7 When fan is set to ÒMedÓ compressor rpm will be limited to CJKMAX 8 When fan is set to ÒLoÓ compressor rpm will be limited to CBEMAX 9 During Cool Dashed when room temperature reaches set te...

Страница 47: ...et to sleep Lo 3 30 minutes after the sleep key is set the sleep shift of temperature starts and upper shift is made at least 6 times If 25 C is not reached after 6 shifts shifts repeat unit 25 C is reached 4 The sleep shift upper value of set temperature is 28 C 5 After 6 hours a shift down to the initial set temperature is made at a rate of 0 33 C 5 min 6 If the operation mode is changed during ...

Страница 48: ... 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 3 When the operation is started by the themostat turning ON the start of the indoor fan is delayed 32 seconds after the start of compressor operation 4 The compressor is operated forcedly for 3 minutes after operation is started 5 The minimum ON time and OFF time of the ...

Страница 49: ...ration continue in Fuzzy control mode 4 Compressor minimum ON time and OFF time is 3 minutes 5 During normal heating mode compressor maximum rpm WMAX will maintain for 120 minutes if indoor temperature is higher than 18 C No time limit constrain if indoor temperature is lower than 18 C and outdoor temperature is lower than 2 C 6 During Hotkeep or Defrost mode indoor operation lamp will blink at in...

Страница 50: ...Operation NOTE 1 Refer to the PWRITE ZU data for the constants expressed by capital alphabet letters in the drawing 1 min WMIN DFMAX d e e p s r o s s e r p m o C TDF 411 TDF 412 TDF 413 TDF421 WMAX TDF 431 STARCPL STARCPL 4000min 4000min 1 4000min 1 TDF 422 Notes 1 The defrosting inhibit period is set as shown in the diagram below When defrosting has finished once the inhibit period is newly set ...

Страница 51: ...1 2 INDOOR UNIT SINGLE ENDED UNION 1 2 R O S S E R P M O C SERVICE VALVE 1 4 ELECTRIC EXPANSION VALVE STRAINER STRAINER HEATING OUTDOOR UNIT REVERSING VALVE SUCTION TANK SERVICE VALVE 1 2 R O S S E R P M O C SERVICE VALVE 1 4 ELECTRIC EXPANSION VALVE STRAINER STRAINER SINGLE ENDED UNION 1 4 INDOOR UNIT SINGLE ENDED UNION 1 2 SINGLE ENDED UNION 1 4 ...

Страница 52: ...W O D 1 D R A W P U 2 E Z I L A I T I N I D R A W N W O D 1 E Z I L A I T I N I D R A W N W O D 1 D R A W P U 2 T N E M O M E H T T A P O T S G N I G N I W S T R A T S D R A W N W O D 1 D R A W P U 2 D R A W N W O D 3 T N E M O M E H T T A P O T S G N I G N I W S T R A T S D R A W N W O D 1 D R A W P U 2 D R A W N W O D 3 T N E M O M E H T T A P O T S R O T C E L F E D R I A G N I S O L C G N I W ...

Страница 53: ...e microcomputer starts operation When power ÒOFFÓ voltage drops and reaches 4 2V pin 1 of IC521 is set to ÒLowÓ This will RESET the microcomputer DESCRIPTION OF MAIN CIRCUIT OPERATION MODEL RAS 50FH5 1 Reset Circuit Fig 1 1 Fig 1 2 2 1 5 3 7 NORMAL HI RESET LO RES Microcomputer 4 2 5 C 1 2 5 R 2 2 5 C 1 2 5 C R522 5V 0V IC521 Voltage 5 0V Reset enter at 4 2V Reset release at 4 4V voltage 5 0V Volt...

Страница 54: ...ion Microcomputer Buzzer output BZ1 12V 0V R721 30 1 16 BZ When the buzzer sounds an approx 3 9kHz square signal is output from buzzer output pin of the microcomputer After the amplitude of this signal has been set to 12Vp p by a transistor it is applied to the buzzer The piezoelectric element in the buzzer oscillates to generate the buzzer s sound 12V R1 0V 0V 13 RECEIVER I P Microcomputer R211 R...

Страница 55: ...tor 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 0 0882 10 Horizontal air deflectors Microcomputer pins Step width Horizontal air deflectors 10ms Horizontal air deflectors 15 16 17 18 1 2 3 4 5 6 7 8 Fig 4 2 Microcomputer Output Signals 10 11 8 9 12 0V 7 6 5 4 18 17 16 Microcomputer IC711 C711 C712 C713...

Страница 56: ...erature input R302 A 5 4 3 2 1 0 0 10 10 Heat exchanger temperature C Fig 6 2 20 30 40 t a e g a t l o V V A 6 Heat exchanger temperature thermistor circuit The voltage at depends on the room temperature as shown in Fig 5 2 The circuit detects the indoor heat exchanger temperature and controls the following 1 Preheating 2 Low temperature defrosting during cooling and dehumidifying operation 3 Dete...

Страница 57: ...reheating activation value and the rating and maximum speed of the compressor etc to their initial values Data of self diagnosis mode is stored in IC401 or IC402 data will not be erased even when power is turned off Fig 7 1 Microcomputer External ROM SCL SDA 0V 0V 0V 5V 5V 5V C401 IC401 E 2 PROM 4 0 4 R 3 0 4 R 27 26 1 2 3 4 8 7 6 5 ...

Страница 58: ...e faulty or defective connection Although the compressor continues to operate normally the power factor will decrease the operation current will increase and the overcurrent breaker of the household power board will probably activate Reference If diode stack 1 is faulty the compressor may stop due to ÒlpÓ Òanbormally low speedÓ etc immediately after it starts or it may not operate at all because n...

Страница 59: ...tering from power line to protect electronic parts 6 Surge absorber Varistor 1 2 3 absorbs external power surge 7 Inrush protective resistor R007 R008 This works to protect from overcurrent when power is turned on Reference When inrush protective resistor is defective diode stack may malfunction As a result DC voltage is not generated and no operation can be done Be careful to avoid an electric sh...

Страница 60: ...ed by amp This signal is superimposed to DC 35V line via C801 and L801 To prevent erroneous reception the outdoor microcomputer is designed so that it cannot receive a signal while it is outputting a request signal The receiving circuit in the indoor unit consists of a comparator and transistor The interface signal from the outdoor unit on the DC 35V line is supplied to C821 where DC components ar...

Страница 61: ... receive input SDI MICROCOMPUTER 5V 0V 5V 5V 12V 5V 5V 5V 5V 5V 5V C802 R813 L801 R812 Q803 C803 C804 R811 Q802 Q801 R824 3 2 1 R822 R806 7 0 8 R R805 R803 R804 5 7 6 IC801 R810 50 49 IF transmit output SDO HIC IF receive input SDI MICROCOMPUTER 11 30 68 29 0V L801 L802 C801 C809 R802 Q801 5V 0V R801 3 0 8 R 0V 0V 0V 0V 0V 0V 0V 0V C808 NF COIL2 C810 C802 C806 C807 C812 C811 Interface relay 35V Co...

Страница 62: ...Indoor microcomputer 4 95ms Transmit receive switching time 33ms 1 frame Outdoor HIC 30 Pin 0V 29 Pin 5V 0V 50 Pin 5V 0V 49 Pin 5V 0V DC 35V line 35V Fig 2 2 Voltages Waveforms of indoor Outdoor Microcomputers Outdoor to Indoor Communications Fig 2 3 Voltages Waveforms of indoor Outdoor Microcomputers Indoor to Outdoor Communications ...

Страница 63: ... m a r f 1 e g a s s e m r o o d t u O e g a s s e m r o o d n I s 0 l l a s i e g a s s e m r o o d t u o e h t n e h W e l p m a x E s 1 l l a s i e g a s s e m r o o d n i d n a V 6 3 V 5 3 V 4 3 t e s e r n e h W s m 0 1 x o r p p a t i m s n a r T e v i e c e r e m i t g n i h c t i w s s m 5 9 4 o N r e t c a r a h C 0 s m 3 3 3 1 s m 3 3 3 2 s m 3 3 3 3 s m 3 3 3 o N r e t c a r a h C 0 s m...

Страница 64: ...Compressor minimum rotation speed 3 Compressor minimum rotation speed 2 Compressor minimum rotation speed 1 Compressor minimum rotation speed 0 LSB 7 0 6 0 5 0 4 0 3 0 2 0 1 1 0 0 7 0 1 6 0 1 5 0 1 4 0 1 3 2 1 0 7 6 5 4 3 2 1 0 7 6 5 4 0 1 3 0 1 2 0 1 1 0 0 0 1 o N r e t c a r a h C o N t i B a t a D 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 Fan 7 step request Actual compressor r...

Страница 65: ...p u e h t d e l l a c e r a e d i s m r a r e w o l e h t e d i s W U V W W Ð V V Ð U U Ð A C D r o s s e r p m o C r o t o m l i o c U l i o c V l i o c W 2 e l u d o m r e w o P m e t s y S Ð C501 Ð C502 Ð C503 4 2 R 5 3 0 m H y a l e r r e w o P l i o C 7 0 0 R 8 0 0 R t n e r r u c h s u r n I n o i t c e t o r p y a l e r C006 R001 r e t l i f e s i o N l i o c L N l a n i m r e T d r a o b A...

Страница 66: ...s proportional to duty ratio ON time ON time OFF time of this chopper signal Time T in Fig 3 2 shows the switching period and relation with rotation speed N of the compressor is shown by formula below Fig 3 2 Switching order of power module N 60 2 X 1 T Fig 3 3 shows voltage waveform at each point shown in Figs 3 1 and 3 4 First half of upper arm is chopper second half is ON and first half of lowe...

Страница 67: ... power module Lighting mode when operated with compressor leads disconnected 1 Disconnect connector of 3 pole WHT YEL RED lead wire connecting to compressor located at the lower part of electric parts box 2 Set to compressor operation state other than FAN mode and press Start stop switch of remote control 3 If normal operation continues for more than 1 minute LD303 lights power module is considere...

Страница 68: ... 9 C 1 2 9 C 0 2 9 C 12V D912 9 1 9 R 5 2 9 R 4 0 9 D Z 4 2 9 R C909 15 1 2 8 W J 8 W J 4 3 In the power circuit for P W B power supply for microcomputer peripheral circuits and system power module driver circuit and as well as DC 35V are produced by switching power circuit Switching power circuit performs voltage conversion effectively by switching transistor IC901 to convert DC 330V voltage to h...

Страница 69: ...ing to IC901 Reference If the power circuit for P W B seems to be faulty 1 Make sure that 5V and 12V on the control P W B upper arm U V and W and the lower arm power voltage are the specified values 2 When only the 5V output is low REG 1 regulator faulty 5V 0V shorted output is too high or REG 1 is abnormal 3 When 12V and 5V are abnormal The following defects can be considered 1 Fan operation powe...

Страница 70: ...When collector voltage of Q701 is measured 3 1 16 24 I F 0V 0V Fig 5 Ð 1 D702 CN2 Q701 DC voltmeter or tester Reversing valve R701 R703 R219 Q705 FUSE RESISTOR R E T U P M O C O R C I M PQ701 1 2 3 4 5V HIC I F 35V R702 V Operation condition Collector voltage of Q701 Cooling Heating Dehumidifying General operation of Cooling In normal heating operation MAX rotation speed instructed by indoor micro...

Страница 71: ...ole position detection signal B reference voltage 1 2Vd Detection point W W U U U Ð V Ð V Ð W Ð V To detect U phase voltage at point C is produced by driving motor induced voltage signal voltage at point A and 1 2 voltage of Vd voltage at point B and comparing with comparator For V phase and W phase voltage at point D and voltage at point E are produced in the same way as above Voltage at point C ...

Страница 72: ...e t u p m o c o r c i m m o r f t u p t u o l a n g i S y t u d l l u f f o e s u a c e b r e p p o h c o n e v i r d e s a h p h c a e f o r o t s i s n a r t e h t e v i r d n e h t s i t i l a n g i s 1 7 g i F 6 5 4 3 2 1 R E T U P M O C O R C I M A R512 1 2 5 R R511 R510 R509 R508 R507 0 1 9 4 3 2 1 8 7 6 5 1 3 1 4 1 5 1 6 1 7 1 8 1 1 3 2 1 1 8 7 5 4 0 1 6 3 9 2 3 4 5 6 7 8 9 0 1 1 1 2 1 3 1 ...

Страница 73: ... e v i r D B t n i o p t a l a n g i s e v i r D A V U W V U V W U V W Low speed rotation mode High speed rotation mode V U W V U U V 5V 0V W V V W U U V 15V 0V W V W U W U V W t n i o p t a l a n g i s e v i r D B t n i o p t a l a n g i s e v i r D A Fig 7 2 Fig 7 3 ...

Страница 74: ...Voltage amplifies DC current level detected by the detection resistor and inputs this to microcomputer Internal or external overload is judged in microcomputer Produces reset voltage Modulates chopper signal to drive signal and stops according to presence ab sence of lp signal or reset signal 59 17 61 48 58 62 60 Is D104 L CT1 N R005 0V 0V 0V 0V R221 C218 12V 2 9 2 R 7 4 2 R 7 0 1 C 0V 0V 6 0 0 R ...

Страница 75: ...erminal DC current 0V 0V 3 4 R 0V R41 QC R42 SPM2 SPM2 HIC Main P W B HIC IC1 CN14 IP Outdoor microcomputer F 3 4 R 9 9 8 20 9 2 39 17 B The Ip cut off circuit detects an instantaneous excessive current and stops inverter to protect parts such as SPM2 etc As shown in diagram if current exceeding 27A flows voltage at point recognized by detecting resistor is input to pin of SPM2 HIC and voltage div...

Страница 76: ...internal judgement value OVL judgement with respect to externally set value A D converter A D converter Judgement OVL according to the rotation speed Selects data according to the rotation speed and DC voltage OVL start current data a t a d d e e p s n o i t a t o R Motor control process Microcomputer Detection resistor Fig 8 4 Overload Control System Configuration Fig 8 5 t n e r r u c C D Rotati...

Страница 77: ...r being converted to a voltage and supplies it to the microcomputer 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 During overload control The filter consisting of R245 and C217 removes high harmonic components from the voltage generated from the DC current flowing to the detection resisto...

Страница 78: ...ly voltage varies This control method copes with variations in the voltages as follows 1 Turns on the power module s U and V Ð transistors so the current flows to the motor windings as shown in Fig 8 9 2 Varies the turn ON time of the W transistor according to the DC voltage level and the start is controlled so the start current is approx 10A as shown in Fig 8 10 Fig 8 8 t n e r r u c C D G 0 0 Ro...

Страница 79: ...defrosting condition command to the indoor microcomputer via the circuit interface The microcomputer always reads the outdoor temperature via a thermistor microcomputer pin 64 and 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 dry mode The fol...

Страница 80: ... and 12V line voltage reaches 10 9V and reset voltage input to pin 48 of microcomputer is set to Hi Reset voltage will be hold ÒHiÓ until the 12V line voltage drops to 9 90V even though the power shuts down Microcomputer R252 R289 0V 0V R288 0V 5V 12V HIC R284 JW10 IC5 1 2 4 0 2 C 48 RESET Main P W B Fig 10 1 5 1 2 C 6 8 2 R 5 2 2 C 7 0 1 C 6 2 2 C 5 8 2 R 0V 1 3 2 62 8 Ð 0V 0V 2 9 2 R 12V line 12...

Страница 81: ... low slower Vsp lower than 1 7V stop Motor will output FG pulse by following this motor revolution Outdoor Microprocessor will output PWM control signal from FMCHOP terminal by following the instruction from indoor Microprocessor This PWM control signal will convert to Vsp voltage by smoothing circuit Q101 RC filter Fan motor will start to rotate when Vsp was proceeding over than 1 7V and generate...

Страница 82: ...ing inside of outdoor unit by snowing It may make ÒFan Lock StopÓ 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 ÒFan Lock StopÓ even though the DC Fan Motor is rotating correctly the possible casue is Fan Motor problem or PQ102 on board or control board problem Stop after the Fan motor runs 2 minutes Fan Motor may be br...

Страница 83: ...ut voltage 12 Power Factor Control Circuit Assuming the same current capacity 20A power can be used about 10 effective comparing with curent use power factor of 90 and maximum capacity is thereby improved I input current V input voltage Invalid power area Even if voltage is applied current does not flow Effective voltage area input voltage input current Effective voltage area ...

Страница 84: ... is frosted Wait for 3 4 minutes until it is defrosted If the air conditioner operates in cooling mode when it is cold the evaporator may get frosted Normal sound when refrigerant flows in pipe Compressor may not operate when room when the humidity is preset humidity or less It occurs during defrost ing Wait for 5 10 minutes until the condenser is defrosted At the beginning of heating the fan spee...

Страница 85: ... before stopping operation At this point fan speed is automatic This is because ÒNice temperature reservationÓ 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 ÒNice temperature reservationÓ funct...

Страница 86: ...ling capability so noise becomes slightly louder This does not indicate a fault Noise from the outdoor unit occasionally changes The compressor rotation speed changes according to the difference between the thermostat set temperature and room temperature This does not indicate a fault There is a difference between the set temperature and room temperature There may be a difference between the set t...

Страница 87: ... ground level 2 Also note that it takes about 10 minutes until the voltage fall after the power switch is turned off DANGER Across a Ð b 0V line Across a Ð ground Across b 0V line Ð ground approx 260 360V approx 155 170V approx 155 170V When using an oscilloscope never ground it Don t forget that high voltages as noted above may apply to the oscilloscope DANGER Always keep your hands and metallic ...

Страница 88: ...each part of circuit in indoor unit electrical parts disconnect red gray lead wire connected from diode stack to system power module SPM2 to prevent secondary trouble Be sure to discharge smoothing capacitor Do not use a soldering iron with transformer If one is used thermal fuse inside transformer will be blown DISCHARGE PROCEDURE AND POWER SHUT OFF METHOD FOR POWER CIRCUIT WARNING As shown above...

Страница 89: ...es Yes Yes No No No Normal No No Timer lamp Press the service switch for 1 sec Does the compressor operate After checking be sure to press the service switch to stop the operation Check the refrigerating cycle Check the outdoor electrical parts Check the indoor electrical parts Check to see whether the F cable is connected incorrectly or disconnected See Out door unit self diagnosis lamp lighting ...

Страница 90: ...ta read from IC401 or IC402 is incorrect 1 Reversing valve defective 2 Heat exchanger thermistor disconnected only in the heating mode Note The malfunction mode is entered the 3rd time this abnormal indication appears read every 3 minutes Electrical parts in the outdoor unit 1 Indoor interface circuit 2 Outdoor interface circuit Please check at the outdoor electrical led lamp blinking LD301 and re...

Страница 91: ... 103 SELF DIAGNOSIS LIGHTING MODE MODEL RAC 50YH5 ...

Страница 92: ...nerated between terminals C and D on the terminal board Are control voltages 12V 5V being generated normally Check according to the proper method for checking the power circuit No No No No Y es Y es Do the air deflectors perform initial operation when the power supply is turned on and off Check the indication P W B connection cord and light receiving unit No No Is the microcomputer reset input pin...

Страница 93: ...rts around the outdoor interface transmitting circuit Check the indoor interface transmitting circuit Replace IC801 Check outdoor electrical parts and repair any defective parts around the outdoor interface transmitting circuit Check the room temperature thermistor if it is defective replace it Normal values 10 C approx 20k 25 C approx 10k 30 C approx 8k Check the heat exchanger thermistor if it i...

Страница 94: ... check The microcomputer fan PWM output pin is Hi Yes Yes Yes Yes No Yes Yes Yes No No Yes No No Set to the Hi fan mode The operation lamp lights once and goes out in 5 10 seconds Disconnect CN10 and set to the fan mode again Replace the indoor fan motor The operation lamps lights once and goes out in 5 10 seconds Check to see if shorting etc has occurred in the P W B pattern Check to see if the i...

Страница 95: ...less than 1 Blown open if it is 1 or more Replace ICP1 Check if shorting has occurred in the air deflector motor If these are defective ICP1 will be open again Replace REG2 Check the 5V line if the 5V line is shorted ICP1 will be open again No No Replace IC111 Perform final operation check No Replace ICP2 Check if shorting has occurred in fan motor circuit and 35V interface circuit If these are de...

Страница 96: ...he sensible area should flash in orange when you operate the remote control unit if it is good Ultra redray test card Sensible area Within 2 cm Check functions again If it does not work replace the remote controller ÒBuzzÓ Within 15 cm AM radio Check the LED D1 with a multimeter Replace the battery Install the battery in the correct polarity Y es Y es No No No Y es Does the radio buzz noisily Is b...

Страница 97: ... e n e g g n i e b V 5 s I n i P n e e w t e b 4 n i p d n a V 0 n i p t s e t 8 1 N C t a V 5 t i n u r o o d t u o e h t e t a r e p O n o i t c u r t s n i e h t o t g n i d r o c c a Ò r o o d t u o e h t e t a r e p o o t w o H y l t n e d n e p e d n i t i n u Ó s i s o n g a i d f l e s e h t d i d w o H t h g i l 1 0 3 D L p m a l K O t i u c r i c r e w o p g n i h c t i w s e h t s I n w...

Страница 98: ...o r t n o c e h t y a l e r e c a f r e t n i g n i e b V 0 1 t s a e l t a e g a t l o v a s I t c a t n o c e h t n e e w t e b d e t a r e n e g y a l e r e c a f r e t n i f o s l a n i m r e t t i u c r u c e c a f r e t n i e h t k c e h C s e Y s e Y o N o N s e Y e v i t c e f e d e b y a m 0 1 9 C d n a 7 0 9 D e h t n e e w t e b n o i t c e s e v i t c e f e d a s i e r e h T n o y l p ...

Страница 99: ... a m r o n r o t s i m r e h t f o y t i u n i t n o c e h t s I l a m r o n t i u c r i c r o t s i m r e h t e h t s I e l u d o m r e w o p e h t e c a l p e R s t r a p e v i t c e f e d y n a e c a l p e R r o t s i m r e h t e h t t c e n n o C r o t s i m r e h t e h t e c a l p e R e h t n i s t r a p e c a l p e R t i u c r i c r o t s i m r e h t d n a n r e t t a p f o y t i u n i t n o...

Страница 100: ... r e t t a p f o y t i u n i t n o c k c e h C e h t o t g n i d r o c c a s e r i w d a e l s m a r g a i d c i t a m e h c s d n a B W P s e Y s e Y r e w o p m e t s y s e c a l p e R s t r a p e v i t c e f e d r o e l u d o m r e w o p m e t s y s e h t e c a l p e R e l u d o m e v i t c e f e d y n a e c a l p e R s t r a p l a m r o n t i u c r i c r o t s i m r e h t e h t s I 9 4 5 R 2 4...

Страница 101: ...n e l u d o m r e w o p t u p n i P I r e t u p m o c o r c i m e h t s I l a m r o n l a n g i s n i p y l l a m r o N 7 1 V 5 x o r p p a s i l a m r o n t i u c r i c t e s e r e h t s I r e t u p m o c o r c i m y l l a m r o N n i p 8 4 V 5 x o r p p a s i s t r a p e v i t c e f e d y n a e c a l p e R s t r a p e v i t c e f e d y n a e c a l p e R s t r a p e v i t c e f e d y n a e c a l ...

Страница 102: ...L lamp lit If the lamp is lit it does not indicate fault but the unit is overload status Recheck cord etc of the system power module If they are disconnected connect them securely If abnormality continues replace the system power module Overvoltage defect system power module faulty 15 times blinking Yes No ...

Страница 103: ...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 JUDGING BETWEEN GAS LEAKAGE AND COMPRESSOR DEFECTIVE Blinking off Time until the lamp lights Approx 10 seconds Approx 10 seconds Approx 10 seconds Within Approx 30 seconds Compressor Compressor Gas leakage Possible ...

Страница 104: ...e of digital tester since built in battery is set in reverse direction and terminals are reversed CAUTION If inner circuit of system power module is disconnected open the indicator of tester will not swing and this may assumed as normal In this case if indicator swings when and terminals are connected in reverse of diagram below it is normal Furthermore compare how indicator swings at U V and W ph...

Страница 105: ...us Be sure to push the service switch again to stop the forced cool operation HOW TO OPERATE THE OUTDOOR UNIT INDEPENDENTLY The operation method is the same as ÒHow to operate using the connector to servicing the outdoor unitÓ 1 The charging amount of 300g is equivalent to the load in normal operation Charge refrigerant of 300g after vacuuming 1 Do not operate for more than 5 minutes Parts to be p...

Страница 106: ...E Collector Emitter PGU PGV PGW NGU NGV NGW U V W P1 P2 U N1 L2 L1 W V Circuit diagram of the device excepting the reflux diode Circuit diagram of the module Terminals symbol mark of the module See next page for measuring value using tester ...

Страница 107: ...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 Fig 3 Reception indication P W B Main P W B Support hook 3 Main P W B and Reception Indication P W B 1 Remove each connector from the lead wire 2 Remove the four P W B supports from the main P W B 3 Pull the support hook...

Страница 108: ...ews from the upper and lower bearing covers 4 Remove the locking hook of the lower bearing cover from the 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 Fig 7 Lower bearing cover Cabine...

Страница 109: ... 121 PARTS LIST AND DIAGRAM INDOOR UNIT MODEL RAS 50FH5 ...

Страница 110: ...YH4 S17 1 TERMINAL PMRAS 260GHA R01 1 THERMISTOR ASSY BOARD 20 PMRAS 50FH5 R01 1 P W B MAIN 21 PMRAS 25YH4 S22 1 P W B RECEIVER 25 PMRAS 25YH 4 S26 1 DRAIN PAN ASSY 28 PMRAS 25YH 4 S29 PMRAK 18NH6 002 PMRAK 18NH6 003 PMRAK 18NH6 004 PMRAK 18NH6 005 1 AUTO SWEEP MOTOR 32 1 FRONT COVER ASSEMBLY 35 1 FRONT PANEL 36 1 AIR FILTER R 37 1 AIR FILTER L 38 PMRAS 25YH 4 939 1 LOW COVER 39 PMRAS 25YH 4 S40 1...

Страница 111: ... 123 8 9 33 4 32 14 3 1 27 24 35 26 7 5 22 17 30 29 23 21 20 16 36 28 31 34 11 12 10 15 6 2 38 PARTS LIST AND DIAGRAM OUTDOOR UNIT MODEL RAC 50YH5 ...

Страница 112: ...REACTOR 17 PMRAC 50YH5 S01 1 P W B MAIN 20 PMRAC 40CNH2 S01 1 SYSTEM POWER MODULE 22 PMRAC 25NH4 S13 1 TERMINAL BOARD 23 PMRAC 19SH4 S01 1 THERMISTOR OUTSIDE TEMPERATURE 24 PMRAC 40CNH2 S17 1 PROPELLER FAN 26 PMRAC 40CNH2 S18 1 SUPPORT FAN MOTOR 27 PMRAC 40CNH2 S19 1 FAN MOTOR 40W 28 PMRAC 40CNH2 S04 1 CABINET 29 PMRAC 40CNH2 921 1 NET 30 PMRAC 40CNH2 922 1 TOP COVER 31 PMRAC 50NH4 S10 1 SIDE PLAT...

Страница 113: ...RAS 50FH5 RAC 50YH5 HITACHI PM NO 0364E Printed in Malaysia ...

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