Hitachi RAF-25RPA Service Manual

Hide thumbs Also See for RAF-25RPA:

Instruction manual (39 pages)

Instruction manual (39 pages)

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

Table of Contents

Quick Links

Summary of Contents for Hitachi RAF-25RPA

Page 1 15,010) 14,330 (3,753 17,742) 750 (+91) 750 (+91) DIMENSIONS (mm) 288 (+47) 288 (+47) After installation SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT. ROOM AIR CONDITIONER INDOOR UNIT + OUTDOOR UNIT JULY 2013 Hitachi Household Appliances(Wuhu) Co., Ltd.
Page 2 6$)(7< '85,1* 5(3$,5 :25. ,Q RUGHU WR GLVDVVHPEOH DQG UHSDLU WKH XQLW LQ TXHVWLRQ EH VXUH WR GLVFRQQHFW WKH SRZHU FRUG SOXJ IURP WKH SRZHU RXWOHW EHIRUH VWDUWLQJ WKH ZRUN ,I LW LV QHFHVVDU\ WR UHSODFH DQ\ SDUWV WKH\ VKRXOG EH UHSODFHG ZLWK UHVSHFWLYH JHQXLQH SDUWV IRU WKH XQLW DQG WKH UHSODFHPHQW PXVW EH HIIHFWHG LQ FRUUHFW PDQQHU DFFRUGLQJ WR WKH LQVWUXFWLRQV LQ WKH 6HUYLFH 0DQXDO RI WKH XQLW ,I WKH FRQWDFWV RI HOHFWULFDO...
Page 3 WORKING STANDARDS FOR PREVENTING BREAKAGE OF SEMICONDUCTORS 1. Scope The standards provide for items to be generally observed in carrying and handling semiconductors in relative manufactures during maintenance and handling thereof. (They apply the same to handling of abnormal goods such as rejected goods being returned.) 2.
Page 4 (6) Use a three wire type soldering iron including a grounding wire. Metal plate (of Al. stainless steel, etc.) Bare copper wire (for body earth) Working table Resistor 1MΩ(1/2W) Staple Earth wire Fig.3 Grounding of the working table soldering iron Grounding wire Screw stop at the screwed part using a rag plate...
Page 5 CAUTION 1. In quiet operation or stopping the running, its heard slight flowing noise of refrigerant in the refrigerating cycle occasionally, but this noise is not abnormal for the operation. 2. When it thunders near by, it is recommend to stop the operation and to disconnect the power cord plug from the power outlet for safety.
Page 6: Specifications
SPECIFICATIONS RAF-25RPA RAF-35RPA RAC-25 RAC-35 MODEL 20W (DC35V) 47W DC120-380V FAN MOTOR FAN MOTOR CAPACITOR FAN MOTOR PROTECTOR ASD102CK-A7JK COMPRESSOR OVER HEAT PROTECTOR OVERLOAD RELAY 3.15A FUSE (for MICRO COMPUTER) G4A-1A POWER RELAY, STICK RELAY POWER SWITCH TEMPORARY SWITCH SERVICE SWITCH...
Page 7 Figure showing the installation of lndoor and Outdoor unit MODEL RAF-25R A/RAC-25FPA RAF-3 5R A/RAC-3 5FPA [Indoor unit installation] Direction of Piping Above 150mm Piping con guration may be in three different directions: direct rear piping, Above 200mm right downward piping and right sideways piping.
Page 24 – 22 –...
Page 27: Construction And Dimensional Diagram
CONSTRUCTION AND DIMENSIONAL DIAGRAM MODEL RAF-25RPA RAF-35RPA Unit : mm INDOOR UNIT Wireless remote φ65 Standard underfloor piping position controller Cabinet Front panel Air outlet Infrared receiver Small dia. pipe (φ6.35) Large dia. pipe (φ9.52) Piping hole Piping hole Air inlet...
Page 28 MODEL RAC-25FPA RAC-35FPA OUTDOOR UNIT Unit : mm 19.5 27.5 Handle Air outlet Air suction Handle Rear side Air suction Holed for anchor bolt (2-φ12×16 slots for φ8.0 bolt) Notch for anchor bolt (for 2-φ8.0 bolt) Fixing hole Drain hole Drain hole Service space More than...
Page 29: Main Parts Component
MAIN PARTS COMPONENT THERMOSTAT (Room temperature Thermistor) Thermostat Specifications MODEL RAF-25RPA RAF-35RPA THERMOSTAT MODEL OPERATION MODE COOL HEAT (62.1) 16.7 (62.1) INDICATION 15.0 60.8) 17.3 (63.1) 23.3 (76.5) 24.7 (76.5) TEMPERATURE INDICATION ˚C (˚F) 23.0 25.3 (75.2) (77.5) 31.3 (90.9) 32.7...
Page 30 RAC-25FPA RAC-35FPA 5RS102ZBC21 DC 220 - 350 V YELLOW WHITE 2M= 0.875 2M= 1.043 YELLOW WHITE 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.
Page 31 RAF-25RPA / RAC-25FPA RAF-35RPA / RAC-35FPA CAUTION OUTDOOR UNIT The marked parts very important ones for safety. NOTE 1.Connecting cable 1.5mm dia.x2 (C D line) is used for the connection.
Page 32 WIRING DIAGRAM OF THE PRINTED WIRING BOARD [Remote controller] RAR- 5 E2...
Page 33 MODEL RAF-25RPA / RAC-35RPA...
Page 34 MODEL RAC-25FPA / RAC-35FPA...
Page 37 Mode data ﬁle REQUIRED VALUE OF UNIT SIDE REQUIRED VALUE OF UNIT SIDE LABEL NAME LABEL NAME RAF-25RPA RAF-35RPA RAF-25 RAF-35 WMAX 5000 5800 FWAH_P WMAX2 4700 5800 FWH_P WSTD 3800 4700 FWAHH_P 1000 WJKMAX 3150 4300 FWHH_P 1000 WBEMAX...
Page 38 Notes: (1) Condition for entering into Cool Dashed mode. When fan set to “Hi” or “Auto and when the compressor speed (P section) due to temperature difference between setting temperature (including the correction shift only) and room temperature is CMAX or higher. (2) 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.
Page 40 Notes: (1) If the room temperature is (cooling preset temperature) - (1.33°C) or less after 30 seconds from starting the operation, 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. (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.
Page 42 Notes: (1) Condition for entering into Hot Dashed mode. When fan set to “Hi” or “Auto mode” and i) Indoor temperature is lower than 18°C, and ii) outdoor temperature is lower than 10°C, and iii) compressor speed (P section) due to temperature difference between setting temperature (including the correction shift only) and room temperature is WMAX or higher.
Page 43 Setting Defrosting Inhibit Period DFTIM_OT P5 DFTIM_OTP 10 DFTIM_OT P0 Outdoor temperature – 1 0 – 5˚C ˚C Notes: The first inhibit time after operation start is set to DFTIM_FST. From the second time onwards, the inhibit time is set according to the time required for defrosting.
Page 45 ECO button Cooling:0.66 Dehumidifying:0.66 Set temperature Heating:0.66 Current restrict Compressor speed Notes: Can’t set POWERFUL and ECO at the same time. During FAN operation,can’t set ECO. SILENT Silent button Indoor WSZMAX/CSZMAX Compresson speed Outdoor Notes: Can’t set POWERFUL and SILENT at the same time.
Page 46: Cooling Cycle
RAF-25RP A/RAC-25FPA COOLING CYCLE OUTDOOR UNIT INDOOR UNIT HEATING CYCLE INDOOR UNIT OUTDOOR UNIT...
Page 47 RAF-35RP A/RAC-35FPA COOLING CYCLE OUTDOOR UNIT INDOOR UNIT HEATING CYCLE INDOOR UNIT OUTDOOR UNIT...
Page 48 ',6$66(0%/< $66(0%/< 352&('85( $,5 ),/7(5 &OHDQ WKH DLU ILOWHU DV LW UHPRYHV GXVW LQVLGH WKH URRP %H VXUH WR FOHDQ WKH ILOWHU RQFH HYHU\ WZR ZHHNV VR DV QRW WR FRQVXPH HOHFWULFLW\ XQQHFHVVDULO\ 352&('85( 2SHQ WKH IURQW SDQHO ‡ 7R RSHQ WKH IURQW SDQHO XVH WKH UHPRWH FRQWUROOHU WR VWRS XQLW RSHUDWLRQ 7KHQ SUHVV DW WKH WRS OHIW DQG ULJKW FRUQHUV RI WKH IURQW SDQHO ‡...
Page 49 )5217 &29(5 5HPRYH WKH IURQW SDQHO 5HPRYH WKH IURQW FRYHU 5HPRYH WKH ERWWRP VFUHZV DQG WRS VFUHZV 3XOO WKH IURQW FRYHU DSSUR[LPDWHO\ PP WRZDUG \RX 6FUHZ 6FUHZ &DELQHW )URQW &RYHU $77$&+,1* :KHQ DWWDFKLQJ WKH IURQW FRYHU IROORZ WKH DERYH SURFHGXUH LQ UHYHUVH RUGHU 0DNH VXUH WKH KRRNV DW WKH IURQW FRYHU WRS VXUIDFH DUH VHFXUHO\ LQVHUWHG LQWR WKH FDELQHW...
Page 50 ,1',&$7,1* 3:% 5HPRYH WKH IURQW SDQHO DQG WKH IURQW FRYHU 5HPRYH WKH LQGLFDWLQJ 3:% FDVH 386+ &ODZ 386+ 386+ &ODZ ',6&+$5*( )5$0( 5HPRYH WKH IURQW SDQHO DQG WKH IURQW FRYHU 5HPRYH WKH IL[LQJ VFUHZV RI WKH GLVFKDUJH IUDPH DQG WKHQ SXOO RXW WKH GLVFKDUJH IUDPH WRZDUG \RX 6FUHZ...
Page 51 (/(&75,&$/ 3$576 &$6( 5HPRYH WKH IURQW SDQHO DQG WKH IURQW FRYHU 5HPRYH WKH IL[LQJ VFUHZV RI WKH HOHFWULFDO SDUWV FDVH 6FUHZ (OHFWULFDO SDUWV FDVH 6FUHZ...
Page 52 )$1 02725 $1' 7$1*(17,$/ $,5 )/2: )$1 VFUHZV WKDW DUH WKH IL[DWLRQ RI HYDSRUDWRU DUH UHPRYHG 7KH WDE ZKHUH WKH OHIW VLGH RI HYDSRUDWRU LV IL[HG LV UHPRYHG (YDSRUDWRU LV OLIWHG XS DQG UHPRYHG (YDSRUDWRU 6FUHZ 6FUHZ 7ZR VFUHZV WKDW LV WKH IL[DWLRQ RI IDQPRWRU VXSSRUW LV UHPRYHG...
Page 53: Outdoor Unit
OUTDOOR UNIT MODEL RAC-2 5/35FPA 1. Electrical parts (1)Remove the service value cover lock screws (6)Remove each connector and earth cable from and lower the cover to remove it. the lead wire. Then,remove the electrical box . (2)Remove the top cover lock screw and raise the cover to remove it.
Page 54: Description Of Main Circuit Operation
DESCRIPTION OF MAIN CIRCUIT OPERATION RAF-25RPA RAF-35RPA 02'(/ 1. Power circuit CN10 XA-6P-Top Indoor Fan Motor Q131 ICP2 R121 Q111 L111 ICP1 R114 Q113 Q115 D121 Q112 R115 IC121 IC111 Q114 Q751 Q116 IC712 12 V power supply Power supply voltage...
Page 55 2. Reset Circuit Reset R523 Microcomputer R522 IC521 Fig.2-1 Timing chart Voltage 5 . 0V ② pin of IC521 supply voltage RES detecting voltage RES canceling voltage 4 . 4V 4 . 2V Voltage ① pin of IC521 output voltage 5.0V or ⑪...
Page 56 3. Fan Motor Drive Circuit CN10 35V line Microcomputer 5V line No. of L751 R751 rotation output Fan Motor Q751 C751 R752 No. of rotation detect R631 C631 Fig. 3-1 The waveform of voltage at the T1 = Low No. of rotation point T2 = High No.
Page 57 • When the buzzer sounds, an approx. 3.9kHz square signal is output from buzzer output pin 83 of the micro computer. 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.
Page 58 6. Initial Setting Circuit (IC401) When power is supplied, the microcomputer reads the data in IC401 (E PROM) and sets the preheating activation value and the rating and maximum speed of the compressor, etc. to their initial values. Data of self-diagnosis mode is stored in IC401; data will not be erased even when power is turned off. Microcomputer C401 External ROM...
Page 59 DSW1 R923 R541 R543 DSW1 1 0 0...
Page 60 MODEL RAC-25F A, RAC-35F A 1. Power circuit This circuit rectifies the 230 V AC voltage applied between terminals A and B of the terminal board to produce a DC voltage. However, the DC voltage rises to approximately 280 to 350 V at the time of compressor operation. Ｒ...
Page 61 Main parts DB601 DB1 This operates to rectify the DC voltage applied between terminals A and B of the terminal board to a DC voltage. 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.
Page 62 2. Power circuit for P.W.B. • The v oltage specification of the power circuit is as follows. <Check points> Output Voltage Main load Measuring points Potential failure modes spec. – 11-13V MAIN P.W.B. R117 (“12V” display) R117 (“0V” display) The unit won’t operate MAIN P.W.B.
Page 63 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.
Page 64 Fig. 3-1 shows the interface circuit used for the indoor and outdoor microcomputers to communicate with each other. Control P.W.B. R335 C332 L301 Q334 R333 R332 Q333 CJ301 Q332 IF Transmission Q331 L101 Terminal board Microcomputer R326 R330 IC301 C321 (2/2) R327 R650...
Page 65 0.7V Outdoor microcomputer Indoor microcomputer 35V DC line Fig. 3-2 Voltages Waveforms of indoor / Outdoor Microcomputers (Outdoor to Indoor Communications) Outdoor microcomputer Indoor microcomputer 35V DC line Fig. 3-3 Voltages Waveforms of indoor / Outdoor Microcomputers (Indoor to Outdoor Communications)
Page 66 4. Reset Circuit HYBRID IC BOARD MAIN P.W.B. Ｄ２７３Ｒ２８８Ｉ／ＦＲＥＬＡＹ４０５Ｖ１２Ｖ０ＶＭＩＣＲＯ８ＣＯＭＰＵＴＥＲ３...
Page 67 5. Temperature Detection Circuit MAIN P.W.B. Hybrid IC BOARD O.H. thermistor R203 O.H. C202 Microcomputer R301 DEF. thermistor R239 65 DEF. C216 R302 Outdoor temperature thermistor CN10 R240 Outdoor temperature C217 R303 Fig. 5-1 The Over heat thermistor circuit detects the temperature at the surface of the compressor head, the Defrost. thermistor circuit detects the defrosting operation temperature.
Page 68: Reversing Valve
6. Reversing valve control circuit ３５Ｖ REVERSING VALVE ＲＬ５４Ｖ３Ｄ４０１２１０ＶＣＮ２１２ＶＭＩＣＲＯＣＯＭＰＵＴＥＲ３...
Page 69 7. Electric expansion valve control circuit Ｂ − １２ＶＲ４１８９１６１ＣＮ１５１５２５Ｖ６１４３５１３４ＭＩＣＲＯ４...
Page 70: Drive Circuit
8. Outdoor DC Fan Motor control circuit ＵＶＷＱ７１６Ｑ７１５Ｑ７１４Ｃ７５２Ｃ７５１Ｑ７１１Ｑ７１３Ｑ７１２Ｃ...
Page 71 < Reference > When operation stop with LD301 blinks 12 times, it may be caused by faulty DC fan motor. In this case, please check CN24 connection first. It makes Fan Motor Lock a lso if those connectors are in misconnection. DC Fan Motor has broken invites 2A Fuse burned.
Page 72 R603...
Page 73 Intelligent power module switches power supply current according to position of the compressor motor rotor. The switching order is as shown in Fig. 9-2. At point E: U + is ON, V - is ON (circuit in Fig. 9-1) At point F: U + is chopped (OFF), V - is ON (circuit in Fig. 9-4) Upper arm transistor Time...
Page 74 C031 R008 Fig. 9 -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. 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.
Page 75: Dehumidifying Mode
6(59,&( &$// 4 $ 02'(/ F- 5RPA / RAC-25FPA F-35RPA / RAC-35FPA &22/,1* 02'( 7KH FRPSUHVVRU KDV VWRSSHG &KHFN LI LQGRRU KHDW ,I WKH DLU FRQGLWLRQHU RSHUDWHV LQ VXGGHQO\ GXULQJ FRROLQJ H[FKDQJHU LV IURVWHG FRROLQJ PRGH ZKHQ LW LV FROG RSHUDWLRQ :DLW IRU PLQXWHV XQWLO LW LV WKH HYDSRUDWRU PD\ JHW IURVWHG...
Page 76 In case of weekly timer operation has been preset, When does "Nice temperature reservation" "Nice temperature reservation" not work. not work.
Page 77 27+(56 7KLV LV EHFDXVH WKH FRRO 7KH KHDW H[FKDQJHU WHPSHUDWXUH LV 7KH LQGRRU IDQ YDULHV ZLQG SUHYHQWLRQ IXQFWLRQ VHQVHG LQ WKH DXWR IDQ VSHHG PRGH DPRQJ KLJK DLU IORZ ORZ LV RSHUDWLQJ DQG GRHV QRW :KHQ WKH WHPSHUDWXUH LV ORZ WKH IDQ DLU IORZ DQG EUHH]H LQ WKH LQGLFDWH D IDXOW VSHHG YDULHV DPRQJ KLJK DLU IORZ ORZ DLU...
Page 78: Troubleshooting
TROUBLE SHOOTING MODEL RAC-25FPA, RAC-35FPA PRECAUTIONS FOR CHECKING Power WARNING Remember that voltage of 175 V is applied to the 0V line on the P.W.B. or the like as shown in the right diagram. Always keep your hands and metallic things away WARNING from the cabinet.
Page 79 DISCHARGE, PROCEDURE AND POWER SHUT OFF METHOD FOR POWER CIRCUIT WARNING Caution • Voltage of about 350 V is charged between the terminal of smoothing capacitors (375F x 2). • During continuity check for each circuit part of the outdoor unit, be sure to discharge the smoothing capacitors.
Page 80 ［Other Caution］ 1.Cautions for ICP (IC protector) (1) Be careful not to short-circuit during servicing. →If short-circuited, ICP will instantaneously open. (2) If ICP Opens, remove cause, and then replace ICP. →If repair is incomplete, ICP may open again. ICP2 indoor DC fan motor 12V power circuit...
Page 81 TROUBLE SHOOTING WHEN THE TIMER LAMP BLINKS MODEL RAF-25RPA, RAF-35RPA When the timer lamp on the display section of the indoor unit blinks, refer to the following table. Lamp blinking mode Main defective 2 sec. ONCE Reversing valve defective 2 sec.
Page 82 SELF-DIAGNOSIS LIGHTING MODE MODEL RAC-25 A, RAC-35...
Page 83 Self Diagnosis Memory Function Defective modes stored in the non-volatile memory of the indoor unit are re-indicated by the remote controller operation. This is useful to check the defective mode when switching OFF the power or restarting the unit operation without checking the number of blinking of the defective indication lamp.
Page 84 Contents of Error Codes INFO function Indication 【Error code】 MAIN CAUSE Error code [01] Indoor error [00] Refrigerant cycle defective Error code [03] Indoor error [00] Communication error between indoor and out door units. Error code [09] Indoor error [00] Indoor thermistor defective Error code [10] Indoor error [00]...
Page 85 Diagnosis and troubleshooting of indoor electric parts, outdoor electric parts and refrigerating cycle Initiating troubleshooting Are the "timer lamp" (orange) of the indoor unit Perform troubleshooting according to the blinking? self-diagnosis display. The product will begin to run in response to a remote control setting: "cooling mode, temperature setting 16 ℃"...
Page 86 Checking the indoor unit electrical parts Introduction First check the failure phenomenon and status, and then move on to elaborate diagnosis. Initiating troubleshooting How many times does the time lamp Is the "timer lamp" (orange) of the indoor unit blinking? blinding not 4 times 4 times...
Page 87 1. Failure phenomenon: The power will not become turned on. Neither initialization, remote control, nor any other step works on the vane position at power-on. Situation Estimated cause of fuse blowout ・ Abnormally high voltage applied to the power supply [ Estimated failure ・...
Page 88 2.Failure phenomenon: The product will not receive a remote control signal. [ Situation ] The product does not receive a remote control signal. It is not very responsive. (The product does run normally in response to the emergency operation switch.) [ Estimated failure ・...
Page 89 How to identify sources of jamming in the reception of remote control signals [ Situation ] The product may become poorly responsive to remote control signals due to external factors even though the product itself is trouble-free. [ Estimating sources of jamming ] Identify the installation status of the air-conditioner and the indoor and outdoor environments to identify possible causes of the jamming.
Page 90 Effects of other Checking points electrical products ・Check the effects of light and power noises coming from other electrical products. ・Turn on and off the electrical products, turn off the power and turn on the power, and check their effects on the reception of remote control signals.
Page 91 3. Failure phenomenon: The compressor will not run. [ Situation ] The compressor will not run (the same state as the thermometer turned off), the product receives remote control signals normally. The self-diagnosis lamp (LD301) of the outdoor unit blinks once or becomes turned off. [ Estimated failure locations ] ・Room temperature thermistor, heat exchanger thermistor ・Microcomputer peripheral circuit [ Diagnosis flow ]...
Page 92 4. Failure phenomenon: The fan motor will not stop. Situation I have conducted the stop operation on the product by remote control, but the indoor fan motor will not stop. Estimated failure locations ・Indoor fan motor ・Fan motor drive circuit Diagnosis flow Initiating troubleshooting Run the product by remote control and then stop it.
Page 93 5. Timer lamp blinking: blinking once Situation The timer lamp blinks one time and the product will not operate. (This is not a sign of a breakdown.) [Estimated failure locations] ・ Reversing valve defective. ・ The refrigerating cycle block gas leak. [Diagnosis flow] Please see the mian circuit presentation of page 71 6.
Page 94 8. Timer lamp blinking: blinking 9 times [Situation] The timer lamp blinks 9 times and the product will not run. [Estimated failure location] ・Loose connector, wire break, or short-circuit in the room temperature thermistor, heat exchanger thermistor. [Cautions] ・Starting the product by remote control will initiate failure detection. (Merely turning on the power will not activate the failure detection function.) [Diagnosis flow] Initiating troubleshooting...
Page 95 . Timer lamp blinking: blinking 10 times [Situation] The timer lamp blinks 10 times and the product will not run. ・Loose connector or wire break in the indoor fan motor ・ [Estimated failure locations] ・ Indoor fan motor mechanically locked ・Indoor fan motor ・Indoor fan motor drive circuit [Diagnosis flow]...
Page 96 10. Timer lamp blinking: blinking 12 times [Situation] The timer blinks 12 times and the product will not run. [Estimated failure locations] ・Erroneous connection in the indoor-outdoor connection line (F cable) ・ Power realy open ・ Forget to connect CN30 of outdoor P.W.B ・Wire break or poor insertion of the indoor-outdoor connection line (F cable) ・Electrical parts in the outdoor unit (communication circuit, power circuit error) ・Communication error due to noise in other home electronics...
Page 97: Precautions For Servicing
WARNING 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. When replacing any P.W.B., disconnect all the cables (including ground wires). [ Main P.W.B.] Remove four screws securing the main Remove the earth screw from the electrical box.
Page 102 (JUDGING BETWEEN GAS LEAKAGE AND CHECKING THE REFRIGERATING CYCLE COMPRESSOR DEFECTIVE) 1. Troubleshooting procedure (No operation, No heating, No cooling) Lighting mode Blinks Blinks Blinks Blinks Blinks Blinks Connect U,V,W phase leads to the Self- 2 times 3 times 4 times 5 times 6 times 8times...
Page 111 HOW TO OPERATE USING THE TEST SWITCH THE OUTDOOR UNIT MODEL RAC-25FPA/RAC-35FPA 1. Turn off the power supply . 2. Remove the electrical box cover. 3. Turn on the power switch 4. After waiting for 30 seconds, push the test switch for a second. l l i Never operate the unit for more than 5 minites.
Page 112 Lighting mode of the self-diagnosis lamp Mounting location of the self-diagnosis lamp WARNING When you start the selfcheck, please confirm that the pin 25 pin 33 do not short with the pin 26 , pin 29 , pin 32 of the IPM.
Page 113: Parts List And Diagram
PARTS LIST AND DIAGRAM INDOOR UNIT MODEL: RAF -25/ 35RPA...
Page 114 HWRAF- - 50NX2 A14 #HBOARD-AS...
Page 115 OUTDOOR UNIT MODEL: RAC-25/ 3 5F P A...
Page 117 RAF-25RPA / RAC-25FPA HHAW NO. 0069E- RAF-35RPA / RAC-35FPA...

This manual is also suitable for:

Rac-25fpa Raf-35rpa Rac-35fpa

Hitachi RAF-25RPA Service Manual

Quick Links

Related Manuals for Hitachi RAF-25RPA

Summary of Contents for Hitachi RAF-25RPA

This manual is also suitable for:

Table of Contents