Hitachi RAC-18WEF, Service Manual

Page: 1 / 59

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
ROOM AIR CONDITIONER
OUTDOOR UNIT
SERVICE MANUAL
TECHNICAL INFORMATION
SPECIFICATIONS
OUTDOOR UNIT
NO.0132E
RAC-18WEF
RAC-18WEF
TYPE
MODEL
POWER SOURCE
TOTAL INPUT (W)
TOTAL AMPERES (A)
CAPACITY
(KW)
(B.T.U./h)
TOTAL INPUT (W)
TOTAL AMPERES (A)
CAPACITY
(KW)
(B.T.U./h)
W
H
D
COOLING
HEATING
DIMENSIONS
(mm)
NET WEIGHT (Kg)
RAC-25WEF RAC-35WEF RAC-50WEF
OUTDOOR UNIT OUTDOOR UNIT
DC-INVERTER
OUTDOOR UNIT OUTDOOR UNIT
1 PHASE,50Hz ,220-230V 1 PHASE,50Hz ,220-230V 1 PHASE,50Hz ,220-230V 1 PHASE,50Hz ,220-230V
580 (250~1,010) 700 (250~1,290) 1,090 (250~1,460) 1,560 ( 5 00~2,100)
660(+60) 660(+60) 660(+60) 792(+91)
530 530 530 600
278(+55) 278(+55) 278(+55) 299(+47)
23.7 23.7 2 5.0 39.5
RAC-50WEF
Johnson Controls-Hitachi Air Conditioning Wuhu Co., Ltd.
JCH-WH
FOR SERVICE PERSONNEL ONLY
RAC-25WEF
RAC-35WEF
RAC-18WEF
RAC-25WEF
RAC-35WEF
RAC-50WEF
REFER TO THE FOUNDATION MANUAL
CONTENTS
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
SERVICE CALL Q & A ----------------------------------------------------------- 39
TROUBLE SHOOTING ----------------------------------------------------------- 42
PARTS LIST AND DIAGRAM -------------------------------------------------- 55
3.19-3.05
2.00 (0.90~2.50)
6,820 (3,070~8,530)
620 (250~970)
2.50 (0.90~3.20)
3.62-3.46
8,530 (3,070~10,920)
880 (250~1,250)
4.56-4.36
3.40 (0.90~4.40)
11,600 (3,070~15,010)
5.41-5.18
1,100 (250~1,700)
5.56-5.31
14,330 (3,070~17,060)
3.84-3.67
2.50 (0.90~3.10)
8,530 (3,070~10,580)
7.16-6.85
3.50 (0.90~4.00) 5.00 (1.90~5.20)
11,940 (3,070~13,650) 17,060 (6,480~17,740)
20,470 (7,510~24,910)
7.62-7.29
1,660 (500~2,750)
4.20 (0.90~5.00) 6.00 (2.20~7.30)
After installation
1