Hitachi RAM-90QH5, Service Manual, Page: 1 / 83

NO. 0371E
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
ROOM AIR CONDITIONER
OUTDOOR UNIT
APRIL 2007
Refrigeration & Air-Conditioning Division
SERVICE MANUAL
PM
REFER TO THE FOUNDATION MANUAL
TECHNICAL INFORMATION
FOR SERVICE PERSONNEL ONLY
CONTENTS
SPECIFICATIONS ------------------------------------------------------------------- 5
INSTALLATION --------------------------------------------------------------------- 16
CONSTRUCTION AND DIMENSIONAL DIAGRAM --------------------- 20
WIRING DIAGRAM ---------------------------------------------------------------- 21
MAIN PARTS COMPONENT --------------------------------------------------- 24
CIRCUIT DIAGRAM --------------------------------------------------------------- 25
BLOCK DIAGRAM ----------------------------------------------------------------- 29
BASIC MODE ----------------------------------------------------------------------- 31
REFRIGERATING CYCLE DIAGRAM --------------------------------------- 51
DESCRIPTION OF MAIN CIRCUIT OPERATION ----------------------- 52
TROUBLE SHOOTING ----------------------------------------------------------- 88
PARTS LIST AND DIAGRAM -------------------------------------------------- 94
After installation
(W)
(A)
COOLING CAPACITY
DC INVERTER FIVE SYSTEM MULTI
TYPE
MODEL
POWER SOURCE
TOTAL INPUT
TOTAL AMPERES
SPECIFICATIONS
RAM-90QH5
HEATING CAPACITY
DIMENSIONS (mm)
NET WEIGHT
1ø, 220 - 240V, 50/60Hz
W
H
D
(kg)
(kW)
(B.T.U.)
REFER TO THE SPECIFICATIONS PAGE
OUTDOOR UNIT
RAM-90QH5
RAM-90QH5
950
800
370
71
NOTE:
This manual describes only points that differ from
PM No. 0322E, PM No. 0355E and PM No. 0366E
for items not described in this manual.