AW NO. 0004E
SERVICE MANUAL
TECHNICAL INFORMATION
REFER TO THE FOUNDATION MANUAL
ROOM AIR CONDITIONER
INDOOR UNIT + OUTDOOR UNIT
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
FOR SERVICE PERSONNEL ONLY
SPECIFICATIONS
SPECIFICATIONS ‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥ 4
HOW TO USE ‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥ 5
CONSTRUCTION AND DIMENSIONAL DIAGRAM
‥‥ 15
MAIN PARTS COMPONENT ‥‥‥‥‥‥‥‥‥‥ 17
WIRING DIAGRAM ‥‥‥‥‥‥‥‥‥‥‥‥‥‥ 19
WIRING DIAGRAM OF THE PRINTED WIRING BOARD
‥20
PRINTED WIRING BOARD LOCATION DIAGRAM
‥‥ 24
BLOCK DIAGRAM‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥ 27
BASIC MODE‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥ 29
REFRIGERATING CYCLE DIAGRAM ‥‥‥‥‥‥ 38
DESCRIPTION OF MAIN CIRCUIT OPERATION
‥‥‥ 39
SERVICE CALL Q & A ‥‥‥‥‥‥‥‥‥‥‥‥ 67
TROUBLE SHOOTING ‥‥‥‥‥‥‥‥‥‥‥‥ 70
PROCEDURE FOR DISASSEMBLY AND REASSEMBLY
‥‥96
PARTS LIST AND DIAGRAM ‥‥‥‥‥‥‥‥‥ 98
CONTENTS
RAS-18YH4 /
RAC-18YH4
RAC-18YH4
RAS-18YH4
(W)
(A)
(kW)
(B.T.U./h)
(W)
(A)
(kW)
(B.T.U./h)
W
H
D
(kg)
RAS-18YH4 RAC-18YH4
DC INVERTER (WALL TYPE)
TYPE
MODEL
POWER SOURCE
TOTAL INPUT
TOTAL AMPERES
CAPACITY
TOTAL INPUT
TOTAL AMPERES
CAPACITY
DIMENSIONS
(mm)
NET WEIGHT
780
280
205
9.5
COOLING
HEATING
INDOOR UNIT OUTDOOR UNIT
1 PHASE, 50Hz, 230V
550 (155 - 1,010)
2.81
2.00 (0.90 - 2.50)
6,820 (3,070 - 8,530)
580 (115 - 970)
2.81
2.50 (0.90 - 3.20)
8,530 (3,070 - 10,920)
750(+91)
※
(+47)
※
(+5)
※
548
288
35
After installation
※
DECEMBER 2004
Hitachi Household Appliance (Wuhu) Co.,Ltd.
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