Hitachi RAK-18QH8 - Service Manual

NO. 0456E
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
ROOM AIR CONDITIONER
INDOOR UNIT
JUNE 2009 Refrigeration & Air-Conditioning Division
SERVICE MANUAL
PM
REFER TO THE FOUNDATION MANUAL
TECHNICAL INFORMATION
FOR SERVICE PERSONNEL ONLY
(W)
(A)
(kW)
(B.T.U./h)
(W)
(A)
(kW)
(B.T.U./h)
W
H
D
(kg)
DC INVERTER (WALL TYPE)
TYPE
MODEL
POWER SOURCE
TOTAL INPUT
TOTAL AMPERES
CAPACITY
TOTAL INPUT
TOTAL AMPERES
CAPACITY
DIMENSIONS
(mm)
NET WEIGHT
SPECIFICATIONS
CONTENTS
SPECIFICATIONS ----------------------------------------------------- 4
HOW TO USE ---------------------------------------------------------- 8
CONSTRUCTION AND DIMENSIONAL DIAGRAM ------- 30
MAIN PARTS COMPONENT ------------------------------------- 31
WIRING DIAGRAM -------------------------------------------------- 32
CIRCUIT DIAGRAM ------------------------------------------------- 33
BLOCK DIAGRAM --------------------------------------------------- 37
BASIC MODE --------------------------------------------------------- 39
REFRIGERATING CYCLE DIAGRAM ------------------------- 53
AUTO SWING FUNCTION ---------------------------------------- 55
DESCRIPTION OF MAIN CIRCUIT OPERATION --------- 56
SERVICE CALL Q & A -------------------------------------------- 63
PARTS LIST AND DIAGRAM ------------------------------------ 72
COOLING
HEATING
795
295
198
RAK-50QH8(W)
RAK-50QH8(B)
1 PHASE, 50/60 Hz, 220-240V
REFER TO THE SPECIFICATION (OUTDOOR)
INDOOR UNIT
RAK-25QH8(W)
RAK-25QH8(B)
RAK-35QH8(W)
RAK-35QH8(B)
NOTE:
This manual describes only points that differ from
PM No. 0270E, PM No. 0312E, PM No. 0322E &
PM No. 0371E for items not described in this manual.
9.5
9.5
RAK-18QH8S(W)
RAK-18QH8(W)
RAK-25QH8(W)
RAK-35QH8(W)
RAK-50QH8(W)
RAK-18QH8S(B)
RAK-18QH8(B)
RAK-25QH8(B)
RAK-35QH8(B)
RAK-50QH8(B)
RAK-18QH8S(W)
RAK-18QH8(W)
RAK-25QH8(W)
RAK-35QH8(W)
RAK-50QH8(W)
RAK-18QH8S(B)
RAK-18QH8(B)
RAK-25QH8(B)
RAK-35QH8(B)
RAK-50QH8(B)
RAK-18QH8(W)
RAK-18QH8(B)
9.5 9.5
RAK-18QH8S(W)
RAK-18QH8S(B)
9.5