Hitachi RAM-71QH5 User Manual

NO. 0459E
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
ROOM AIR CONDITIONER
INDOOR UNIT + OUTDOOR UNIT
SEPTEMBER 2009 Refrigeration & Air-Conditioning Division
SERVICE MANUAL
PM
REFER TO THE FOUNDATION MANUAL
TECHNICAL INFORMATION
FOR SERVICE PERSONNEL ONLY
CONTENTS
SPECIFICATIONS ------------------------------------------------------------------- 5
FEATURES -------------------------------------------------------------------------- 17
HOW TO USE ---------------------------------------------------------------------- 21
INSTALLATION --------------------------------------------------------------------- 45
CONSTRUCTION AND DIMENSIONAL DIAGRAM --------------------- 49
MAIN PARTS COMPONENT --------------------------------------------------- 55
WIRING DIAGRAM ---------------------------------------------------------------- 61
CIRCUIT DIAGRAM --------------------------------------------------------------- 67
BLOCK DIAGRAM ----------------------------------------------------------------- 81
BASIC MODE ----------------------------------------------------------------------- 85
REFRIGERATING CYCLE DIAGRAM -------------------------------------- 109
DESCRIPTION OF MAIN CIRCUIT OPERATION ---------------------- 113
TROUBLE SHOOTING ---------------------------------------------------------- 136
SERVICE CALL Q & A --------------------------------------------------------- 185
DISASSEMBLY AND REASSEMBLY --------------------------------------- 201
PARTS LIST AND DIAGRAM ------------------------------------------------- 210
After installation
(W)
(A)
COOLING CAPACITY
DC INVERTER DUAL SYSTEM MULTI
TYPE
MODEL
POWER SOURCE
TOTAL INPUT
TOTAL AMPERES
SPECIFICATIONS
RAM-71QH5
HEATING CAPACITY
DIMENSIONS (mm)
NET WEIGHT
1ø, 220 - 240V, 50Hz
W
H
D
(kg)
(kW)
(B.T.U.)
REFER TO THE SPECIFICATIONS PAGE
OUTDOOR UNIT
RAM-71QH5
RAM-71QH5
850
800
298
55
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Hitachi RAM-71QH5 Specifications

General

Brand	Hitachi
Model	RAM-71QH5
Category	Air Conditioner
Language	English

Summary

SAFETY DURING REPAIR WORK

General Safety Precautions

Essential safety guidelines for servicing the unit to prevent accidents and damage.

WORKING STANDARDS FOR PREVENTING BREAKAGE OF SEMICONDUCTORS

Items to be observed in handling

Outlines mandatory procedures and precautions for handling sensitive parts.

INSTALLATION

WIRING DIAGRAM

CIRCUIT DIAGRAM

BLOCK DIAGRAM

DEFROST

Defrost start condition

REFRIGERATING CYCLE DIAGRAM

DESCRIPTION OF MAIN CIRCUIT OPERATION

Power Circuit

Explanation of the power supply and conversion circuits.

Overload control circuit (OVL control circuit)

Temperature Detection Circuit

INSPECTING OUTDOOR ELECTRICAL PARTS

SELF-DIAGNOSIS DETAILS

TROUBLE SHOOTING

PRECAUTIONS FOR CHECKING

Important safety precautions and warnings when performing checks.

PARTS LIST AND DIAGRAM