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SERVICE MANUAL
TECHNICAL INFORMATION
FOR SERVICE PERSONNEL ONLY
OUTDOOR UNIT
RAC-18WPC
RAC-25WPC
SPECIFICATIONS
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
Johnson Controls-Hitachi Air Conditioning Wuhu Co., Ltd.
HHAW
REFER TO THE FOUNDATION MANUAL
SPECIFICATIONS ------------------------------------------------------------------- 6
CONSTRUCTION AND DIMENSIONAL DIAGRAM --------------------- 8
MAIN PARTS COMPONENT --------------------------------------------------- 9
WIRING DIAGRAM ---------------------------------------------------------------- 11
BLOCK DIAGRAM ----------------------------------------------------------------- 13
REFRIGERATING CYCLE DIAGRAM --------------------------------------- 14
PROCEDURE FOR DISASSEMBLY AND REASSEMBLY-------------15
DESCRIPTION OF MAIN CIRCUIT OPERATION ----------------------- 16
TROUBLE SHOOTING ----------------------------------------------------------- 28
PARTS LIST AND DIAGRAM --------------------------------------------------
DC INVERTER
OUTDOOR UNIT
RAC-18W
PC
1 PHASE,50Hz,220-230V
550 (
250
)
1010
3.12-2.97
2.00 (0.90 2.50)
8,530 (3,070 10,580)
580 (250 970)
3.49-3.34
2.50 (0.90
3.20)
11,600 (3,070 15,010)
660(+60)
530
278(+35)
27.5
OUTDOOR UNIT
0100E
RAC-18WPC
RAC-25WPC
CONTENTS
OUTDOOR UNIT
RAC-25W
PC
1 PHASE,50Hz,220-230V
700 (250
1,290)
3.75-3.59
2.50 (0.90 3.10)
8,530 (3,070 10,580)
880 (250 1,250)
4.56-4.36
3.40 (0.90 4.40)
11,600 (3,070 15,010)
660(+60)
530
278(+35)
27.5
After installation
41
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Related Manuals for Hitachi RAC-18WPC
Summary of Contents for Hitachi RAC-18WPC
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Page 1: Table Of Contents
11,600 (3,070 15,010) 11,600 (3,070 15,010) (B.T.U./h) 660(+60) 660(+60) DIMENSIONS (mm) 278(+35) 278(+35) 27.5 27.5 NET WEIGHT (Kg) After installation SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT ROOM AIR CONDITIONER OUTDOOR UNIT Johnson Controls-Hitachi Air Conditioning 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.
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Page 6: Specifications
SPECIFICATIONS RAC-18WPC MODEL RAC-25WPC FAN MOTOR 47W (DC120~380V) FAN MOTOR CAPACITOR FAN MOTOR PROTECTOR COMPRESSOR ASD084SFNA7JK1 COMPRESSOR MOTOR CAPACITOR OVERLOAD PROTECTOR YES(INTERNAL) OVERHEAT PROTECTOR FUSE (for MICROPROCESSOR) 15A, 2A, 3A, 3.15A POWER RELAY G4A-1A POWER SWITCH TEMPORARY SWITCH SERVICE SWITCH... - Page 7 Figure showing the installation of lndoor and Outdoor unit MODEL RAC-18WPC RAC-25WPC 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...
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Page 8: Construction And Dimensional Diagram
CONSTRUCTION AND DIMENSIONAL DIAGRAM MODEL RAC-18WPC,RAC-25WPC OUTDOOR UNIT Air outlet 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. -
Page 9: Main Parts Component
MAIN PARTS COMPONENT THERMOSTAT (Room temperature Thermistor) FAN MOTOR Fan Motor Specifications MODEL RAC-18/ 25WPC WHT(V) CONNECTION RED(U) BLK(W) BLU : BLUE YEL : YELLOW BRN : BROWN WHT : WHITE GRY : GRAY ORN : ORANGE GRN : GREEN RED : RED BLK : BLACK PNK : PINK... - Page 10 COMPRESSOR MOTOR Compressor Motor Specifications MODEL RAC- 18/ 25WPC COMPRESSOR TYPE ASD084SFNA7JK1 POWER SOURCE 100 - 240 V WHITE YELLOW 2M= 0.74 2M= 0.88 YELLOW WHITE COMPRESSOR RAC-18/ 25WPC 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.
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Page 11: Wiring Diagram
WIRING DIAGRAM RAC-18/25WPC... - Page 12 MODEL RA C -18/25WPC...
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Page 13: Block Diagram
BLOCK DIAGRAM MODEL RAC-18/25WPC Power source OUTDOOR UNIT 1 O 230V 50Hz 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... -
Page 14: Refrigerating Cycle Diagram
MODEL RAC-18/25WPC Indoor unit Indoor unit... -
Page 15: Procedure For Disassembly And Reassembly
Procedure for Disassembly and Reassembly <OUTDOOR UNIT> MODEL RAC-18/25WP Remove P.W.B. fixing screws (2 locations) and radiation fin fixing 1. Electrical Parts screws ( locations), and remove the P.W.B. from the support. (1) Remove the upper cover fixing screws and lift the cover to remove it. (2) Remove the service valve cover. -
Page 16: Description Of Main Circuit Operation
DESCRIPTION OF MAIN CIRCUIT OPERATION AC-18/25WPC 300-330 Main parts C021-C022,375 ,420V) - Page 17 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 18 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 19 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 20 HIC P.W.B 70 74 75...
- Page 21 6. Electric expansion valve circuit...
- Page 22 2A Fuse DC300 -330V...
- Page 23 ( DC300-330V )
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Page 24: 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 25 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 exchange temperature and, to weak wind to slight wind. prevention is working.
- Page 26 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 27 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.
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Page 28: Trouble Shooting
TROUBLE SHOOTING MODEL RAC-18/25WPC Inspection instructions RAC-18/25WPC Indoor fan motor Power supply Indoor Electrical Outdoor Electrical 1Φ 230V 50Hz Compressor motor Warning 0V line Note that the 0 V line of the Control circuit Control circuit outdoor electrical parts and the primary power circuit of the indoor electrical parts have voltages to ground as... - Page 29 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. During continuity check for each circuit part of the outdoor unit, be sure to discharge the smoothing capacitors.
- Page 30 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 31 Troubleshooting support Function [Display on the ・The failure mode detected on the outdoor unit side is displayed by outdoor unit side] blinking the "LD301". Detecting a failure will stop the outdoor unit and keep blinking the LD301 until it is restarted. (The communication error will persist until the communication is reestablished.) ・The failure modes detected on the indoor and outdoor unit sides...
- Page 32 SELF-DIAGNOSIS LIGHTING MODE MODEL RAC-18/25WP C...
- Page 33 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 34 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. Check the F cable connection (for half insertion, connection by Correct the F cable connection.
- Page 35 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 36 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 37 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. Abnormal The product detected an abnormality in the The LD301 blinks 12 times Remove all foreign matter.
- Page 38 (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 39 How to run the product with the outdoor unit test switch If the indoor electrical parts is out of order and if you wish to run the outdoor unit 1. Turn on the outdoor terminal boards L and N (220-230 V AC). 2.
- Page 40 Cautions 1. Applying power directly to the outdoor unit will cause a rush current to stress the outdoor unit. Therefore, if the indoor unit is not out of order, do not use the method descried in 2). 2. Before making the connections, be sure to turn off the breaker. 3.
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Page 41: Parts List And Diagram
OUTDOOR UNIT MODEL RAC-18/25WPC... - Page 42 OUTDOOR UNIT Q'TY/U HHAW PARTS NO PARTS NAME HWRAC-K10HCG A01 BASE HWRAC-18WEB COMPRESSOR HWRAC-18WEB COMPRESSOR RUBBER HWRAC-18WEB PUSH NUT HWRAC-18WEB CONDENSER HWRAC-18WPC REVERSING VALVE 2S-VALVE HWRAC-50WEA HWRAC-10GH5 3S-VALVE HWRAC-18WEB O.L.R COVER HWRAC-18WPC CONNECTING CORD(COMP) HWRAC-E10H2 THERMISTOR (DEFROST) HWRAC-D10EX THERMISTOR SUPPORT HWRAC-18WEB ELECTRIC EXPAN.
- Page 43 HITACHI RAC-18WPC HHAW NO. 0 10 0 0 RAC-25WPC...