Hitachi RAC-35WPC Service Manual
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Hitachi RAC-35WPC Service Manual

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See also: Installation Manual
SERVICE MANUAL
TECHNICAL INFORMATION
FOR SERVICE PERSONNEL ONLY

OUTDOOR UNIT

RAC-35WPC
TYPE
MODEL
POWER SOURCE
TOTAL INPUT (W
TOTAL AMPERES (A)
COOLING
(KW)
CAPACITY
(B.T.U./h)
TOTAL INPUT (W
TOTAL AMPERES (A)
HEATING
(KW)
CAPACITY
(B.T.U./h)
W
DIMENSIONS
H
(mm)
D
NET WEIGHT
(Kg)
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
ROOM AIR CONDITIONER
Hitachi Household Appliances(Wuhu) Co., Ltd.
HHAW
REFER TO THE FOUNDATION MANUAL

SPECIFICATIONS ------------------------------------------------------------------- 6

Construction And Dimensional Diagram ---------------------- 9
Main Parts Component --------------------------------------------------- 11
Wiring Diagram ---------------------------------------------------------------- 13
Block Diagram ----------------------------------------------------------------- 16
Refrigerating Cycle Diagram --------------------------------------- 17
Description Of Main Circuit Operation ----------------------- 20
RAC-50WPC
SERVICE CALL Q & A ---------------------------------------------------------- 37
Trouble Shooting ------------------------------------------------------------41
Parts List And Diagram --------------------------------------------------56
OUTDOOR UNIT
RAC-35W
PC
1 PHASE,50Hz ,220-230V
1,090 (250 1,460)
4.87-4.66
3.50 (0.90 4.00)
11,940 (3,070 13,650)
1,100 (250 1,700)
5.51-5.27
4.20 (0.90 5.00)
14,330 (3,070 17,060)
750(+65)
548
288(+27.5)
33
OUTDOOR UNIT
1
NO.0097E
RAC-35WPC
RAC-50WPC
CONTENTS
DC INVERTER
OUTDOOR UNIT
1 PHASE,50Hz ,220-230V
1,560 (500 2,100)
5.00 (1.90 5.20)
17,060 (6,480 17,740)
1,660 (500 2,750)
6.00 (2.20 7.30)
20,470 (7,510 24,910)
RAC-50W
PC
7.30-6.98
7.93-7.59
792(+85)
600
299(+47)
41
After installation

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  • Page 1: Service Manual

    6.00 (2.20 7.30) (KW) CAPACITY 14,330 (3,070 17,060) (B.T.U./h) 20,470 (7,510 24,910) 750(+65) 792(+85) DIMENSIONS (mm) 288(+27.5) 299(+47) NET WEIGHT (Kg) After installation SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT ROOM AIR CONDITIONER OUTDOOR UNIT 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 In quiet or stop operation, slight flowing noise of refrigerant in the refrigerating cycle is heard occasionally, but this noise is not abnormal for the operation. When it thunders near by, it is recommend to stop the operation and turn off the circuit break er for safety. In the event of power failure,the room air conditioner will restare automatically in the previously selected mode once the power is restored.

  • Page 6: Specifications

    SPECIFICATIONS MODEL RAC-35 PC RAC- FAN MOTOR 47W (DC120~380V) FAN MOTOR CAPACITOR FAN MOTOR PROTECTOR COMPRESSOR ASD102SKQ A6 JK6 ATD141RDNA8JT COMPRESSOR MOTOR CAPACITOR OVERLOAD PROTECTOR YES(INTERNAL) OVERHEAT PROTECTOR FUSE (for MICROPROCESSOR) 15A, 2A, 3A, 3.15A 25A, 2A, 3A, 3.15A POWER RELAY G4A-1A POWER SWITCH TEMPORARY SWITCH...
  • Page 7 Figure showing the installation of Outdoor unit MODEL RAC-35WPC The refrigerating machine oil is easily affected by moisture. Use caution to prevent water from entering the cycle. The difference in height between above 200mm the indoor and outdoor unit should be kept below 10m.
  • Page 8 Figure showing the installation of Outdoor unit MODEL RAC-50WPC The refrigerating machine oil is easily affected by moisture. Use caution to prevent water from entering the cycle. The difference in height between above 200mm the indoor and outdoor unit should be kept below 10m. above 50 mm when The connecting pipe, no matter installed on the...

  • Page 9: Construction And Dimensional Diagram

    CONSTRUCTION AND DIMENSIONAL DIAGRAM MODEL RAC-35WPC OUTDOOR UNIT Handle Handle Air outlet Air Suction grill Rear side Holes for anchor bolt (2 – ø12 x 6 slots for ø8.0 bolt) Notch for anchor bolt (for 2 – ø8.0 bolt) Drain hole...
  • Page 10 CONSTRUCTION AND DIMENSIONAL DIAGRAM MODEL RAC-50WPC OUTDOOR UNIT Unit : mm Drain hole Drain hole Drain hole More than NOTE: 1.For outdoor unit installation , allow at least 2 sides of space around the unit ensure ventilation flue. 2.The connecting pipe , should all the insulated with insulation pipe. 3.Piping length is within 20m.

  • Page 11: Main Parts Component

    GRY : GRAY ORN : ORANGE GRN : GREEN RED : RED BLK : BLACK PNK : PINK VIO : VIOLET MAIN ELECTRIC COMPONENTS FOR OUTDOOR UNIT 15 (mH) 250 m MAX (20 ˚C) RAC-35WPC REACTOR RAC-50WPC 5.3 (mH), 67m (20 ˚C)
  • Page 12 COMPRESSOR MOTOR Compressor Motor Specifications MODEL RAC-50WPC RAC- 35WPC COMPRESSOR TYPE ASD102SKQ A6 JK6 ATD141RDNA8JT POWER SOURCE 220 - 350 V 220 - 350 V OUTPUT 840W 116 5W WHITE YELLOW 2M= 2.16 7 2M= 1.310 RAC-50WPC RAC-35WP 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.

  • Page 13: Wiring Diagram

    WIRING DIAGRAM RAC-35WPC RAC-5 W P...
  • Page 14 MODEL RAC-...
  • Page 15 MODEL RAC-50WPC...

  • Page 16: Block Diagram

    BLOCK DIAGRAM MODEL RAC-35/50WPC Power source OUTDOOR UNIT Compressor Power circuit drive circuit Indoor unit Compressor Indoor / Outdoor motor interface circuit Control power circuit Outdoor DC fan motor Reset circuit drive circuit Outdoor Fan motor Overheat thermistor Defrost thermistor Reversing valve drive circuit Outdoor temperature...
  • Page 17 MODEL RAC-35WPC COOLING CYCLE OUTDOOR UNIT Indoor unit Silencer Silencer HEATING CYCLE OUTDOOR UNIT Indoor unit Silencer Silencer...
  • Page 18 MODEL RAC-50WPC COOLING CYCLE OUTDOOR UNIT Silencer １／２ Silencer Indoor unit Silencer Silencer １／４ HEATING CYCLE OUTDOOR UNIT Silencer １／２ Silencer Indoor unit Silencer Silencer １／４...

  • Page 19: Procedure For Disassembly And Reassembly

    Procedure for Disassembly and Reassembly OUTDOOR UNIT MODEL RAC-50WP OUTDOOR UNIT MODEL RAC-35WPC 1. Electrical parts 1. Electrical parts (1)Remove the service value cover lock screws (1)Remove the service value cover lock screws and lower the cover to remove it.

  • Page 20: Description Of Main Circuit Operation

    DESCRIPTION OF MAIN CIRCUIT OPERATION RAC-35WPC 300-330 Main parts C021-C022,37 5 ,420V)
  • Page 21 2. Power circuit (Low voltage) Fig. 2-1 The 230V AC voltage is rectified to DC voltage (B-12V,16V,12V,5V) pass through switching control IC (ICI), switching transformer. (1) B-12V Power supply for electrical expansion valve. (2) 16V Power supply for IPM driver circuit of compressor and fan motor, IGBT action. (3) 12V Power supply for 4 way valve relay, power relay, inrush current relay,motor current amplification, (4) 5V...
  • Page 22 Main parts 001,C002,C003,C004,C005,C011,C013,C014，NF1 1,2,5,8. DC/DC convertor IC (DC12V DC5V). L105 (JUMPER) D110 (EARTH) L104 (JUMPER) 0.5V D110 (EARTH) L103 (JUMPER) 15.5 1.5V D110 (EARTH) 1.0V R120 B-12V Expansion valve B-12V O/P 2.5V R120 B-0V) 1.0V...
  • Page 23 4.Reversing valve control circuit This model reversing valve control used to control the relay ON/OFF of the revesing valve, and also control the coil of the reversing valve ON/OFF. The relay ON/OFF has different type when in the different operation mode. You can see each operation mode as fllows.
  • Page 24 HIC P.W.B 70 74 75...
  • Page 25 6. Electric expansion valve circuit...
  • Page 26 2A Fuse DC300 -330V...
  • Page 27 ( DC300-330V )
  • Page 28 50WPB 300-330...
  • Page 29 C021-C023,500 ,450V) 33 ACT R249 IP CUT 300-330...
  • Page 30 2. Power circuit (Low voltage) Fig. 2-1 The 230V AC voltage is rectified to DC voltage (B-12V,16V,12V,5V) pass through switching control IC (ICI), switching transformer. (1) B-12V Power supply for electrical expansion valve. (2) 16V Power supply for IPM driver circuit of compressor and fan motor, IGBT action. (3) 12V Power supply for 4 way valve relay, power relay, inrush current relay,motor current amplification, (4) 5V...
  • Page 31 Main parts 001,C002,C003,C004,C005,C011,C013,C014，NF1 1,2,5,8. DC/DC convertor IC (DC12V DC5V). L105 (JUMPER) D110 (EARTH) L104 (JUMPER) 0.5V D110 (EARTH) L103 (JUMPER) 15.5 1.5V D110 (EARTH) 1.0V R418 B-12V Expansion valve B-12V O/P 2.5V 1 “ - ” 1.0V...
  • Page 32 4.Reversing valve control circuit This model reversing valve control used to control the relay ON/OFF of the revesing valve, and also control the coil of the reversing valve ON/OFF. The relay ON/OFF has different type when in the different operation mode. You can see each operation mode as fllows.
  • Page 33 HIC P.W.B 70 74 75...
  • Page 34 6. Electric expansion valve circuit...
  • Page 35 2A Fuse DC300 -330V...
  • Page 36 ( DC300-330V )

  • Page 37: Service Call Q & A

    SERVICE CALL Q&A Cooling operation The compressor sometimes Cooling when the room Check if the heat stops during cooling. temperature is low may exchanger of the indoor cause the heat exchanger unit is covered with dew. of the indoor unit to gather Wait for 3 to 4 minutes dew.
  • Page 38 Common, etc. In "automatic wind speed" mode, the In wind speed "automatic" mode, This does not abnormal. It indoor fan changes from strong wind the product will sense the heat is because the cold wind to weak wind to slight wind. exchange temperature and, prevention is working.

  • Page 39: Wireless Remote Control

    Wireless remote control The timer will not become set. Have you set the product to the current time? The timer cannot be set unless it is set to the current time. The current time When set to the current The current time display will disappears 10 seconds time setting, the reading disappear at once.
  • Page 40 This occurs when the room temperature and humidity I set the "sleep" timer during have reached their settings during dehumidification and operation.But the air-conditioner is in a pause. The product will begin the indoor fan will not run (it will again to run within about 3 minutes.

  • Page 41: Trouble Shooting

    TROUBLE SHOOTING MODEL RAC-35/50WPC Inspection instructions RAC-35WPC RAC-50WPC Indoor fan motor Indoor fan motor Power supply Power supply Indoor Electrical Outdoor Electrical Indoor Electrical Outdoor Electrical 1Φ 230V 50Hz 1Φ 230V 50Hz Compressor Compressor motor motor Warning 0V line 0V line...
  • Page 42 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. RAC-35WPC LEAD WIRE SOLDERING IRON (30 TO 75W) RAC-50WPC MAIN P.W.B.
  • Page 43 Other instructions (1) Detaching and reattaching the receptacles for tab terminal All the receptacles for connecting tab terminals are with a locking mechanism. Forcibly pulling any such receptacle without unlocking it will destroy it. Be on guard. When reconnecting it, insert it securely all the way home. ・Receptacle types and how to unlock them Mild resin cover Cancel button...
  • Page 44 Troubleshooting support Function ・The failure mode detected on the outdoor unit side is displayed by blinking the "LD301". Detecting a failure will stop the outdoor unit [Display on the and keep blinking the LD301 until it is restarted. outdoor unit side] (The communication error will persist until the communication is reestablished.) ・The failure modes detected on the indoor and outdoor unit sides...
  • Page 45 SELF-DIAGNOSIS LIGHTING MODE MODEL RAC-35WP C...
  • Page 46 SELF-DIAGNOSIS LIGHTING MODE MODEL RAC-50WP C...
  • Page 47 After turning on the power, perform air purification by remote control. Is there 230V AC between Is the LD301 turned on? Ensure the power supply. terminal boards L and N? Breaker activated Normal Check for electrical leakage. After that, Has the breaker not been activated? turn on the breaker and make a double -check.
  • Page 48 * This page is for RAC-35WPC Check the blinking frequency of the LD301. The LD301 blinks 13 times. Replace the outdoor electrical parts (in the case of an abnormality in the EEPROM reading error microcomputer or EEPROM). Abnormal The LD301 blinks 9 times.
  • Page 49 Check the blinking frequency of the LD301. * This page is only for RAC-50WPC The LD301 blinks 13 times. Replace the outdoor electrical parts (in the case of an abnormality in the EEPROM reading error microcomputer or EEPROM). Abnormal The LD301 blinks 9 times. Check the F cable connection (for half insertion, connection by Correct the F cable connection.
  • Page 50 The LD301 blinks 10 times. AC 187 V or less, AC 253 V or more Is there AC 220 -230V between Check the power supply. terminal boards L and N? Power supply voltage error AC 187-253 V Ifyon confirm the connect of the reactor Abnormal Is there a voltage of DC 264-358 V ? wire, And it is ok, please change the...
  • Page 51 When cooling: Is the heat exchanger of the outdoor unit clogged up? Is there shelter around? The LD301 blinks 5 times. When heating: Is the heat exchanger or filter of the indoor unit Since the compressor Clear up the causation load was heavy, the clogged up? Overload lower limit cut...
  • Page 52 Abnormal The creepage breaker have already set? The LD301 blinks 14 times Change the compressor and then Does the compressor insulation OK? check the outdoor ele. unit . Active voltage abnormal Normal Change the outdoor ele. unit. Q601,Q602 (RAC-50WPB only) have malfunction Change the outdoor ele.
  • Page 53 (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 54 In this case, turn the power off and start the procedure from 1 again.) ※(For the initialization of the expansion valve, it may take 1 min until the operation starts.) 4. When you press the test switch again for 1 sec or longer, the unit stops the operation. RAC-35WPC RAC-50WPC...

  • Page 55: How To Operate The Outdoor Unit Independently

    6. When the operation with the test switch is over, turn off the breaker and set the connectors back. HOW TO OPERATE THE OUTDOOR UNIT INDEPENDENTLY RAC-35WPC 1. Connect the large dia. pipe side and small dia. pipe side service valve using a pipe.

  • Page 56: Parts List And Diagram

    PARTS LIST AND DIAGRAM OUTDOOR UNIT MODEL RAC-35WPC...
  • Page 57 OUTDOOR UNIT HHAW PARTS NO Q'TY/UNIT PARTS NAME HWRAC-35WPC A01 BASE HWRAC-35WPC A02 COMPRESSOR HWRAC-25YH4 A04 PUSH NUT HWRAC-35WPB A02 CONDENSER HWRAC-35WPC A03 REVERSING VALVE HWRAC-50WEA A06 2S-VALVE HWRAC-10GH5 A03 3S-VALVE HWRAC-SX10HAK A09 SOUND PROOF COVER ASSEMBLY HWRAC-35WPC A04 ELECTRIC EXPANSION VALVE HWRAC-SX10HAK A10 SOUND PROOF COVER ASSEMBLY HWRAC-18WEB...
  • Page 58 MODEL RAC-50WPC...
  • Page 59 OUTDOOR UNIT HHAW PARTS NO Q'TY/UNIT PARTS NAME HWRAC-50WPC A01 BASE HWRAC-50WPC A02 COMPRESSOR HWRAC-50NX2 A04 PUSH NUT HWRAC-50WEC A01 CONDENSER HWRAC-50WPC A03 REVERSING VALVE HWRAC-50WEA A05 SERVICE VALVE HWRAC-50WEA A06 SERVICE VALVE HWRAC-50WEC A03 ELECTRIC EXPANSION VALVE HWRAC-10EH4 A05 SOUND PROOF HWRAC-50WPC A04 SOUND PROOF...
  • Page 60 HITACHI 0097EH H RAC-35WPC HHAW NO. RAC-50WPC...

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