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SERVICE MANUAL
TECHNICAL INFORMATION
FOR SERVICE PERSONNEL ONLY
OUTDOOR UNIT
RAC-18WEF
RAC-25WEF
RAC-35WEF
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
Johnson Controls-Hitachi Air Conditioning Wuhu Co., Ltd.
RAC-50WEF
OUTDOOR UNIT
OUTDOOR UNIT
RAC-18WEF
RAC-25WEF
1 PHASE,50Hz ,220-230V
1 PHASE,50Hz ,220-230V
580 (250~1,010)
700 (250~1,290)
3.19-3.05
3.84-3.67
2.00 (0.90~2.50)
2.50 (0.90~3.10)
6,820 (3,070~8,530)
8,530 (3,070~10,580)
620 (250~970)
880 (250~1,250)
3.62-3.46
4.56-4.36
2.50 (0.90~3.20)
3.40 (0.90~4.40)
8,530 (3,070~10,920)
11,600 (3,070~15,010)
660(+60)
530
278(+55)
23.7
ROOM AIR CONDITIONER
OUTDOOR UNIT
JCH-WH
RAC-18WEF
RAC-25WEF
RAC-35WEF
RAC-50WEF
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
PROCEDURE FOR DISASSEMBLY AND REASSEMBLY------------- 20
DESCRIPTION OF MAIN CIRCUIT OPERATION ------------------------ 22
TROUBLE SHOOTING ----------------------------------------------------------- 42
PARTS LIST AND DIAGRAM -------------------------------------------------- 55
DC-INVERTER
OUTDOOR UNIT
RAC-35WEF
1 PHASE,50Hz ,220-230V
1,090 (250~1,460)
5.41-5.18
3.50 (0.90~4.00)
11,940 (3,070~13,650)
1,100 (250~1,700)
5.56-5.31
4.20 (0.90~5.00)
14,330 (3,070~17,060)
660(+60)
660(+60)
530
530
278(+55)
278(+55)
23.7
25.0
1
NO.0132E
CONTENTS
OUTDOOR UNIT
RAC-50WEF
1 PHASE,50Hz ,220-230V
1,560 (500~2,100)
7.16-6.85
5.00 (1.90~5.20)
17,060 (6,480~17,740)
1,660 (500~2,750)
7.62-7.29
6.00 (2.20~7.30)
20,470 (7,510~24,910)
792(+91)
600
299(+47)
39.5
After installation
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Table of Contents
Related Manuals for Hitachi RAC-18WEF
Summary of Contents for Hitachi RAC-18WEF
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Page 1: Table Of Contents
660(+60) 660(+60) 660(+60) 792(+91) DIMENSIONS (mm) 278(+55) 278(+55) 278(+55) 299(+47) 23.7 23.7 25.0 39.5 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 2. Object parts 3. Items to be observed in handling Fig. 1 Conductive container Ω Fig. 2 Body earth...
- Page 4 Ω Fig.3 Grounding of the working table Fig.4 Grounding a solder iron Ω...
- Page 5 CAUTION...
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Page 6: Specifications
SPECIFICATIONS RAC-18/25WEF RAC-35WEF RAC-50WEF 47W (DC120~280V) DX1U 530g 700g 930g... - Page 7 Figure showing the installation of Outdoor unit MODEL RAC-18WEF RAC-25WEF RAC-35WEF 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...
- Page 8 Figure showing the installation of Outdoor unit MODEL RAC-50WEF 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. The clearances of the unit from top, left, right The connecting pipe, no matter...
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Page 9: Construction And Dimensional Diagram
CONSTRUCTION AND DIMENSIONAL DIAGRAM MODEL RAC-18/25/35WEF 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. 3.Piping length is within 20m. - Page 10 CONSTRUCTION AND DIMENSIONAL DIAGRAM MODEL RAC-50WEF 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.
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Page 11: Main Parts Component
MAIN PARTS COMPONENT THERMOSTAT (Room temperature Thermistor) FAN MOTOR Fan Motor Specifications RAC-18/25/35/50WEF DC : 120 - 280V BLU : BLUE YEL : YELLOW BRN : BROWN WHT : WHITE GRY : GRAY ORN : ORANGE GRN : GREEN RED : RED BLK : BLACK PNK : PINK VIO : VIOLET... - Page 12 COMPRESSOR MOTOR Compressor Motor Specifications RAC-18/25/35WEF RAC-50WEF GSD088SKQA6JK6 GTD130UKQA8JT6 220 - 350 V 220 - 350 V 840W 1350W 2M = 2.167 2M = 1.354 RAC-18/25/35WEF RAC-50WEF CAUTION...
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Page 13: Wiring Diagram
WIRING DIAGRAM MODEL RAC-18/25/35/50WEF EE0022422A [WIRING DIAGRAM] DRIVE CIRCUIT DRIVE CIRCUIT FOR COMPRESSOR FOR FAN MOTOR USE ONE CIRCUIT OF ※A/※B ON-DEMAND RELAY PWB... - Page 14 RAC-18/25/35WEF...
- Page 15 RAC-50WEF...
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Page 16: Block Diagram
BLOCK DIAGRAM MODEL RAC-18/25/35/50WEF 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: Refrigerating Cycle Diagram
MODEL RAC-18/25WEF Indoor unit Indoor unit... - Page 18 RAC-35WEF MODEL Indoor unit Silencer Silencer Indoor unit Silencer Silencer...
- Page 19 RAC-50WEF MODEL Silencer Indoor unit Silencer Silencer Silencer Indoor unit Silencer Silencer...
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Page 20: Procedure For Disassembly And Reassembly
Procedure for Disassembly and Reassembly <OUTDOOR UNIT> Remove P.W.B. fixing screws (2 locations) and MODEL RAC-18/25/35WEF radiation fin fixing screws (7 locations), and 1. Electr cal Part remove the P.W.B. from the support. (1) Remove the upper cover fixing screws and lift the Radiation fin fixing screw cover to remove it. - Page 21 (4)Lower the right side of the front cover and pull (6)Set the electrical box upside down. it forward. Then, remove the cover from the hook. Fig. 9 (7)Remove each connector and earth cable from the lead wire. Then,remove the electrical box. Fig.
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Page 22: Description Of Main Circuit Operation
RAC-18/25/35WEF 300-330 Main parts C021-C022, ,4 0V) - Page 23 2. Power circuit (Low voltage)
- Page 24 Main parts 001,C002,C003,C006 ,C007 ,C011,C013,C014，NF1 1,2,4. REG 1 DC/DC convertor IC (DC6 .5V DC5V). J6 (JUMPER) J32 (JUMPER) J32 (JUMPER) 0.5V (JUMPER) J7 1 (JUMPER) 15.5 1.5V J20 (JUMPER) 1.0V B-12V Expansion valve B-12V O/P 2.5V B-0V) 1.0V...
- Page 25 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 26 HIC P.W.B 8 79 8 3...
- Page 29 70 90...
- Page 30 RAC-50WEF IGBTs 300-330...
- Page 31 C021-C022,610 ,450V) 300-330...
- Page 32 2. Power circuit (Low voltage) Power supply for Comp driver circuit of compressor and fan motor, IGBT action.
- Page 33 Main parts 001,C002,C003,C006 ,C007 ,C011,C013,C014，NF1 1,2. REG 1 DC/DC convertor IC (DC6 .5V DC5V). J9 6 (JUMPER) J138 JUMPER J139 (JUMPER) 0.5V J138 JUMPER J111 (JUMPER) 15.5 1.5V J138 JUMPER 1.0V J133 B-12V Expansion valve B-12V O/P 2.5V J130 B-0V 1.0V...
- Page 34 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 35 HIC P.W.B 78 79 8 3...
- Page 38 70 90...
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Page 39: Service Call Q&A
SERVICE CALL Q&A Cold air comes out during a To improve the dehumidification efficiency performs dehumidifying operation. quiet fan operation. Therefore the air is cold and it is not a malfunction. The operation does not stop even by It sets to perform dehumidifying operation by setting setting the temperature higher than the temperature slightly lower than remote controller room temperature on the remote... - Page 41 Wireless remote Control...
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Page 42: Trouble Shooting
TROUBLE SHOOTING MODEL RAC-18/25/35/50WEF Inspection instructions RAC-18/25/35WEF RAC-50WEF Φ Φ Warning Warning... - Page 43 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 44 ・...
- Page 45 Troubleshooting support ・ ・ ・ ・ ・ ・...
- Page 46 SELF-DIAGNOSIS LIGHTING MODE MODEL RAC-18/25/35/50WEF LED(※1) INDICATION LED INDICATION DURING STOP DANGER (DC350V) DURING COMPRESSOR OPERATE SELF-DIAGNOSE LD301 CHECKING POINT&REPAIR METHOD OPERATION CONTENT LD301 CUT THE POWER SOURCE AND WAIT MORE THAN STATUS NO POWER SUPPLY AT TERMINAL “L - N” → CHECK POWER CABLE 10 MINUTES BEFORE SERVICING WORK.
- Page 47 After turning on the power, perform air purification by remote control. If there is not the air purifier and operating function,setting to 32 by the remote control,and operate in the cooling mode.
- Page 48 LD301 blinking frequency each 0.25 second, please check it carefully. ・ ・...
- Page 51 (RAC-42/50WEF only) have...
- Page 52 CHECKING THE REFRIGERATING CYCLE...
- Page 53 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 54 TO OPERATE THE OUTDOOR UNIT INDEPENDENTLY L RAC-18/25/35WEF RAC-50WEF ※ Do not operate for 5 minutes or more. ※...
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Page 55: Parts List And Diagram
PARTS LIST AND DIAGRAM OUTDOOR UNIT MODEL RAC-18/25/35WEF (35WEF) (18/25WEF) 5(35WEF) 5(18/25WEF) 35WEF) (18/25WEF) - Page 56 INDOOR UNIT H H A W P A R T S N O Q ' T Y / P A R T S N A M E U N I T R A C - 1 8 W E F R A C - 2 5 W E F R A C - 3 5 W E F HWRAC-18WED...
- Page 57 PARTS LIST AND DIAGRAM OUTDOOR UNIT MODEL RAC-50WEF...
- Page 58 OUTDOOR UNIT H H A W P A R T S N O Q ' T Y / P A R T S N A M E U N I T RAC-50WEF 1 HWRAC-50WPC A01 BASE 2 HWRAC-50WED A01 COMPRESSOR 3 HWRAC-50NX2 A04 PUSH NUT 4 HWRAC-50WEC A01...
- Page 59 RAC-18WEF JCH-WH NO.0132E RAC-25WEF RAC-35WEF RAC-50WEF...