Hitachi RAS-14GH4 User Manual

NO. 0193E
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)
(A)
(kW)
(B.T.U./h)
W
H
D
(kg)
(WALL TYPE)
TYPE
MODEL
POWER SOURCE
TOTAL INPUT
TOTAL AMPERES
CAPACITY
TOTAL INPUT
TOTAL AMPERES
CAPACITY
DIMENSIONS
(mm)
NET WEIGHT
SPECIFICATIONS
CONTENTS
SPECIFICATIONS ----------------------------------------------------- 5
HOW TO USE ---------------------------------------------------------- 6
CONSTRUCTION AND DIMENSIONAL DIAGRAM ------- 29
MAIN PARTS COMPONENT ------------------------------------- 31
WIRING DIAGRAM -------------------------------------------------- 33
CIRCUIT DIAGRAM ------------------------------------------------- 35
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 ---------------------------------------- 53
SERVICE CALL Q & A -------------------------------------------- 54
PARTS LIST AND DIAGRAM ------------------------------------ 63
RAS-07GH4 / RAC-07GH4
RAS-09GH4 / RAC-09GH4
RAS-14GH4 / RAC-14GH4
COOLING
HEATING
INDOOR UNIT
RAS-07GH4
780
280
210
9.0
After installation
RAS-07GH4
RAS-09GH4
RAS-14GH4
RAC-14GH4
RAC-07GH4
RAC-09GH4
OUTDOOR UNIT
RAC-07GH4
INDOOR UNIT
RAS-09GH4
OUTDOOR UNIT
RAC-09GH4
INDOOR UNIT
RAS-14GH4
OUTDOOR UNIT
RAC-14GH4
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
490-510-530
2.30-2.30-2.30
2.20
7,500
1 PHASE, 50 Hz, 220-230-240V
890-900-950
4.20-4.10-4.10
2.90
9,900
740-770-810
3.50-3.50-3.50
3.00
10,230
1 PHASE, 50 Hz, 220-230-240V
1060-1090-1120
5.00-5.00-4.90
3.50
11,940
960-1000-1050
4.60-4.60-4.60
3.85
13,140

Hitachi RAS-14GH4 Specifications

General

Brand	Hitachi
Model	RAS-14GH4
Category	Air Conditioner
Language	English

Summary

Safety During Repair Work

Working Standards for Preventing Breakage of Semiconductors

Scope

Defines the standards for handling semiconductors during maintenance.

Object Parts

Identifies specific electronic components like microcomputers and ICs for handling.

Items to be Observed in Handling

Outlines essential precautions for handling electronic parts safely.

Specifications

Safety Precaution

Precautions During Installation

Guidelines for safe and correct installation of the air conditioner unit.

Precautions During Shifting or Maintenance

Safety measures to follow when moving or servicing the unit.

Precautions During Operation

Essential safety advice for operating the air conditioner.

Names and Functions of Each Part

Indoor Unit Components

Details and diagrams of the indoor unit's components.

Outdoor Unit Components

Details and diagrams of the outdoor unit's components.

Indoor Unit Indicators

Operation Indicator

Describes the function and behavior of the operation indicator lamp.

Temporary Switch Operation

Instructions for using the manual operation switch on the indoor unit.

Remote Control Functions

Remote Controller Operation

Detailed description of the remote control's features and operation.

Automatic Operation

Heating Operation

Dehumidifying Operation

Cooling Operation

Fan Operation

How to Set the Timer

How to Set the Sleep Timer

Explanation of the Sleep Timer

Adjusting the Air Deflector

Upward and Downward Direction Adjustment

Adjusting the horizontal air deflector for airflow direction.

Left and Right Direction Adjustment

Adjusting the vertical air deflector for airflow direction.

How to Exchange the Batteries in the Remote Controller

Attaching Air Cleansing and Deodorizing Filters

Maintenance

Air Filter Cleaning

Instructions for cleaning the air filter to ensure optimal performance.

Washable Front Panel Cleaning

Steps for removing and cleaning the front panel of the indoor unit.

Long Off-Period Maintenance

Preparations for the unit before a prolonged period of non-use.

Regular Inspection Points

Points to check periodically by qualified service personnel.

After Sale Service and Warranty

Service Request Pre-checks

Pre-service checks to perform before contacting customer support.

Construction and Dimensional Diagram

Main Parts Component

Thermostat Specifications

Specifications for the thermostat and its temperature sensing function.

Fan Motor Specifications

Specifications and connection details for the fan motor.

Compressor Motor Specifications

Wiring Diagram

Circuit Diagram

Printed Wiring Board Location Diagram

Block Diagram

Basic Mode Operation

Refrigerant Cycle Diagram

Description of Main Circuit Operation

ON / OFF Control

Operation of the unit's power control and timer functions.

Reset Circuit Function

How the system resets the microcomputer upon power restoration.

Buzzer Circuit Operation

Description of the circuit that generates audible alerts.

Initial Setting (IC301)

Details on pre-programmed operational start values.

Receive Circuit Function

How the unit receives signals from the remote controller.

Service Operation Circuit

Circuit used for special service modes and forced cooling.

Auto Swing Function

Service Call Q & A

Parts List and Diagram

Indoor Unit Components (RAS Models)

Detailed breakdown of indoor unit components with part numbers.

Indoor Unit Components (RAC Models)

Detailed breakdown of indoor unit components with part numbers.

Outdoor Unit Components (RAC Models)

Detailed breakdown of outdoor unit components with part numbers.