Hitachi RAS-07G4 - User Manual

NO. 0198E
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
ROOM AIR CONDITIONER
INDOOR UNIT + OUTDOOR UNIT
DECEMBER 2003 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
H
D
(kg)
TYPE
MODEL
POWER SOURCE
TOTAL INPUT
TOTAL AMPERES
CAPACITY
DIMENSIONS
(mm)
NET WEIGHT
SPECIFICATIONS
RAS-07G4
RAS-09G4
RAS-14G4
CONTENTS
SPECIFICATIONS ----------------------------------------------------- 5
HOW TO USE ---------------------------------------------------------- 8
CONSTRUCTION AND DIMENSIONAL DIAGRAM ------- 30
MAIN PARTS COMPONENT ------------------------------------- 32
WIRING DIAGRAM -------------------------------------------------- 34
PRINTED WIRING BOARD LOCATION DIAGRAM ------- 37
BLOCK DIAGRAM --------------------------------------------------- 39
BASIC MODE --------------------------------------------------------- 41
REFRIGERATING CYCLE DIAGRAM ------------------------- 47
DESCRIPTION OF MAIN CIRCUIT OPERATION --------- 49
AUTO SWING FUNCTION ---------------------------------------- 57
SERVICE CALL Q & A -------------------------------------------- 58
TROUBLE SHOOTING --------------------------------------------- 63
PARTS LIST AND DIAGRAM ------------------------------------ 66
RAS-07G4/RAC-07G4
RAS-09G4/RAC-09G4
RAS-14G4/RAC-14G4
COOLING
After installation
RAC-14G4
RAC-07G4
RAC-09G4
(WALL TYPE)
INDOOR UNIT
RAS-07G4
780
280
210
9.0
OUTDOOR UNIT
RAC-07G4
INDOOR UNIT
RAS-09G4
OUTDOOR UNIT
RAC-09G4
INDOOR UNIT
RAS-14G4
OUTDOOR UNIT
RAC-14G4
700
570
210
32
750
570
280
38
780
280
210
9.0
700
570
210
32
780
280
210
9.0
1 PHASE, 50 Hz, 220-230-240V
590-610-630
2.80-2.80-2.80
2.10
7,160
1 PHASE, 50 Hz, 220-230-240V
890-900-950
4.20-4.10-4.10
2.90
9,900
1 PHASE, 50 Hz, 220-230-240V
1060-1090-1120
5.00-5.00-4.90
3.50
11,940

Summary

GENERAL SPECIFICATIONS

SAFETY GUIDELINES FOR REPAIR WORK

OPERATIONAL SAFETY CAUTIONS

INSTALLATION DIAGRAMS AND GUIDELINES

COMPREHENSIVE SAFETY PRECAUTIONS

Installation Safety Measures

Critical safety measures to follow before and during the unit's installation.

Maintenance and Shifting Safety

Safety advice for safely moving or servicing the air conditioning unit.

Operational Safety Rules

Essential safety rules for operating the air conditioner correctly.

REMOTE CONTROL OPERATION GUIDE

AUTOMATIC OPERATION MODE EXPLANATION

COOLING OPERATION PROCEDURES

DEHUMIDIFYING OPERATION PROCEDURES

TIMER SETTING FUNCTIONS

SLEEP TIMER OPERATION

IMPORTANT USER INFORMATION

Heat Sources and Interference Precautions

MAINTENANCE AND CLEANING

Air Filter Cleaning and Maintenance

Instructions for cleaning air filters, including washing and drying procedures.

Front Panel Cleaning and Storage Prep

REGULAR INSPECTION AND SAFETY

AFTER-SALES SERVICE AND WARRANTY

Pre-Service Troubleshooting Checklist

A checklist of common issues to verify before contacting customer support.

KEY COMPONENT SPECIFICATIONS

SYSTEM WIRING DIAGRAM

REMOTE CONTROL CIRCUIT SCHEMATIC

SYSTEM BLOCK DIAGRAM

BASIC OPERATION MODES AND CONTROLS

Timer and Fan Speed Operation

REFRIGERANT CYCLE DIAGRAMS

MAIN CIRCUIT OPERATION LOGIC

ON;OFF and Timer Control Logic

SENSOR AND THERMISTOR CIRCUITS

Room Temperature Sensing Circuit

Heat Exchanger Sensing Circuit

AUTO SWING FUNCTION DETAILS

SERVICE CALL Q & A (COOLING & DEHUMIDIFYING)

Cooling Operation Troubleshooting

Solves problems like abrupt compressor stops during cooling mode.

Dehumidifying Operation Troubleshooting

Answers questions about fan speed, cold air output, and temperature control in dehumidifying mode.

SERVICE CALL Q & A (AUTOMATIC OPERATION)

SERVICE CALL Q & A (COMMON & RESERVATION)

SERVICE CALL Q & A (REMOTE & TIMER)

TROUBLE-SHOOTING FLOWCHART

No Operation Troubleshooting Steps

Guides through checks for fuse, varistor, power switch, and thermal fuse for no operation.

BREAKDOWN CHECK BY TIMER-LAMP BLINKING

Hitachi RAS-07G4 Specifications

General

Brand	Hitachi
Model	RAS-07G4
Category	Air Conditioner
Language	English