Hitachi RAS-D18EX3 - User Manual

TC
SERVICE MANUAL
TECHNICAL INFORMATION
INFORMATIONS TECHNIQUES
REFER TO THE FOUNDATION MANUAL
REPORTEZ-VOUS AU MANUEL DE BASE
ROOM AIR CONDITIONER
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
LES SPECIFICATIONS ET PIECES DETACHEES PEUVENT CHANGER POUR ETRE AMELIOREES.
Printed in Japan (HRT)
FOR SERVICE PERSONNEL ONLY
RESERVE AU PERSONNEL
NO. 0783EF
RAS-50WX8 / RAC-50WX8
RAS-D18EX3 / RAC-D18EX3
TC NO. 0783EF RAS-50WX8 / RAC-50WX8
RAS-D18EX3 / RAC-D18EX3
795
295
198
10
792 (+95)※
600
299 (+46)※
42
RAS-50WX8, RAS-D18EX3 RAC-50WX8, RAC-D18EX3
1ø, 220V - 230V, 50Hz
1,555 (155 - 2,200)
7.14 - 6.83
5.0 (0.9 - 5.2)
17,065 (3,072 - 17,748)
1,745 (155 - 2,200)
8.01 - 7.66
6.3 (0.9 - 7.5)
21,502 (3,072 - 25,598)
RAC-50WX8
RAC-D18EX3
RAS-50WX8
RAS-D18EX3
SPECIFICATIONS
CARACTERISTIQUES GENERALES
SPECIFICATIONS‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥
CARACTERISTIQUES GENERALES
HOW TO USE‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥
UTILISATION
CONSTRUCTION AND DIMENSIONAL DIAGRAM‥‥‥‥
DIMENSIONS DES UNITÉS
MAIN PARTS COMPONENT‥‥‥‥‥‥‥‥‥‥‥‥‥‥
PRINCIPAUX COMPOSANTS
WIRING DIAGRAM‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥
SCHÉMAS ÉLECTRIQUES
WIRING DIAGRAM OF THE PRINTED WIRING BOARD ‥‥‥
SCHÉMA ÉLECTRIQUE DU CIRCUIT IMPRIMÉ
BLOCK DIAGRAM‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥
ORGANIGRAMME DE CONTROLE
BASIC MODE‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥ 
MODE DE BASE
REFRIGERATING CYCLE DIAGRAM ‥‥‥‥‥‥‥‥‥
SCHÉMA DU CYCLE DE RÉFRIGÉRATION
DISASSEMBLY&ASSEMBLYPROCEDURE‥‥‥‥‥‥
PROCEDURE D'ASSEMBLAGE ET DESASSEMBLAGE
DESCRIPTION OF MAIN CIRCUIT OPERATION‥‥‥‥
DESCRIPTION DES PRINCIPAUX CIRCUITS ÉLECTRIQUES
SERVICE CALL Q&A ‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥
MODE OPERATOIRE DE DEPANNAGE
TROUBLE SHOOTING‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥
DETECTION DES PANNES
PARTS LIST AND DIAGRAM‥‥‥‥‥‥‥‥‥‥‥‥‥
LISTE DES PIÉCES DE RECHANGE
CONTENTS
TABLE DES MATIERES
INDOOR UNIT + OUTDOOR UNIT
MARCH 2008 Hitachi Appliances, Inc.
8
9
32
36
39
43
53
57
82
84
94
156
164
204
OUTDOOR UNIT
UNITÉ EXTÉRIEURE
INDOOR UNIT
UNITÉ INTÉRIEURE
※After installation Après installation
TYPE TYPE
MODEL MODÈLE
POWER SOURCE 
SOURCED'ALIMENTATION(PHASE/TENSION/FREQUENCE)
TOTAL INPUT PUISSANCE ABSORBEE TOTALE (W)
TOTAL AMPERES AMPERES TOTAUX (A)
CAPACITY CAPACITE
(kW)
(B.T.U./h)
TOTAL INPUT PUISSANCE ABSORBEE TOTALE (W)
TOTAL AMPERES AMPERES TOTAUX (A)
CAPACITY CAPACITE
(kW)
(B.T.U./h)
W, L
DIMENSIONS DIMENSIONS (mm) H, H
D, P
NET WEIGHT POIDS NET (kg)
DC INVERTER INVERSEUR C.C.
INDOOR UNIT
UNITÉ INTÉRIEURE
OUTDOOR UNIT
UNITÉ EXTÉRIEURE
COOLING
RÉFRIGÉRATION
HEATING
CHAUFFAGE

Summary

Safety During Repair Work

Semiconductor Handling Standards

Semiconductor Handling Precautions

Details the precautions for handling semiconductors.

Technical Specifications

Unit Usage and Safety Precautions

General Safety Precautions

General safety precautions for operating the unit.

Installation Safety Precautions

Safety guidelines for installing the unit.

Shifting and Maintenance Safety

Safety precautions for moving or servicing the unit.

Operation Safety Precautions

Safety guidelines to follow while the unit is operating.

Component Identification

Remote Control Unit Information

Unit Operation Modes

Automatic Operation

Explains the unit's automatic mode selection based on temperature.

Heating Operation

Cooling and Dehumidifying Modes

Dehumidifying Operation

Cooling Operation

Timer Functions

Timer Settings Guide

Setting Various Timers

Maintenance Procedures

Inspection and Service Information

Main Parts Component Details

Wiring Diagrams

Indoor Unit Wiring Diagram

Electrical schematic for the indoor unit.

Outdoor Unit Wiring Diagram

Electrical schematic for the outdoor unit.

Printed Wiring Board Diagrams

Detailed schematics of the printed circuit boards.

System Block Diagrams

Block Diagram Overview

Control Logic Diagram

Detailed Operation Modes

Basic Mode Operation

Cooling Operation Details

Details specific operational parameters and modes for cooling.

Dehumidifying Operation Details

Details specific operational parameters and modes for dehumidifying.

Heating Operation Details

Details specific operational parameters and modes for heating.

Refrigerating Cycle Diagrams

Cooling Cycle Diagram

Schematic of the refrigerant flow during cooling.

Heating Cycle Diagram

Schematic of the refrigerant flow during heating.

Circuit Descriptions and Diagrams

Power Circuit Description

Explanation of the unit's power supply circuit.

Fan Motor Drive Circuit

Power Module Circuit Description

Describes the power module's function.

Parts List and Diagrams

Indoor Unit Parts List and Diagram

Exploded view and list of indoor unit parts.

Outdoor Unit Parts List and Diagram

Exploded view and list of outdoor unit parts.

Hitachi RAS-D18EX3 Specifications

General

Brand	Hitachi
Model	RAS-D18EX3
Category	Air Conditioner
Language	English