Hitachi RAS-08LH1 User Manual

NO. 0486E
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
ROOM AIR CONDITIONER
INDOOR UNIT + OUTDOOR UNIT
FEBRUARY 2011 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 ---------30
MAIN PARTS COMPONENT --------------------------------------32
WIRING DIAGRAM ---------------------------------------------------34
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 -----------------------------------------57
SERVICE CALL Q & A ----------------------------------------------58
PARTS LIST AND DIAGRAM --------------------------------------67
RAS-08LH1/RAS-08LH1(B) / RAC-08LH1
RAS-10LH1/RAS-10LH1(B) / RAC-10LH1
RAS-14LH1/RAS-14LH1B) / RAC-14LH1
COOLING
HEATING
INDOOR UNIT
RAS-08LH1/
RAS-08LH1(B)
780
280
220
8.5
After installation
RAS-08LH1/RAS-08LH1(B)
RAS-10LH1/RAS-10LH1(B)
RAS-14LH1/RAS-14LH1(B)
RAS-08LH1
RAS-10LH1
RAS-14LH1
OUTDOOR UNIT
RAC-8LH1
INDOOR UNIT
RAS-10LH1/
RAS-10LH1(B)
OUTDOOR UNIT
RAC-10LH1
INDOOR UNIT
RAS-14LH1/
RAS-14LH1(B)
OUTDOOR UNIT
RAC-14LH1
700
468
258
23
700
468
258
27
780
280
220
9.0
700
468
258
25
780
280
220
9.0
1 PHASE, 50 Hz, 220-230V
670 – 680
3.14 – 3.05
2.18 – 2.18
7,440 – 7,440
570 – 580
2.70 – 2.63
2.18 – 2.18
7,440 – 7,440
1 PHASE, 50 Hz, 220-230V
910 – 940
4.25 – 4.20
2.92 – 2.96
9,970 – 10,100
780 – 810
3.65 – 3.62
2.97 – 2.98
10,140 – 10,170
1 PHASE, 50 Hz, 220-230V
1,300 – 1,320
6.10 – 5.90
3.66 – 3.68
12,500 – 12,560
1,020 – 1,060
4.85 – 4.80
3.81 – 3.86
13,010 – 13,180

Hitachi RAS-08LH1 Specifications

General

Type	Split System
Cooling Capacity	2.5 kW
Energy Efficiency Ratio (EER)	3.21
Coefficient of Performance (COP)	3.61
Power Supply	220-240V, 50Hz
Refrigerant	R410A
Weight (Indoor Unit)	9 kg
Noise Level (Outdoor)	50 dB(A)

Summary

Safety and Handling Procedures

Safety During Repair Work

Essential safety guidelines for technicians performing repairs on the unit.

Semiconductor Handling Standards

Guidelines for safely handling semiconductors to prevent damage during maintenance.

General Safety Precautions

Important warnings and cautions for safe operation, installation, and maintenance.

Unit Specifications and Components

Specifications Overview

Technical specifications for different models, including electrical and capacity data.

Parts Identification

Visual identification of indoor and outdoor unit components and dimensions.

Main Component Details

Detailed specifications for key components like thermostat, fan motor, and compressor.

Operation Modes and Functions

Standard Operation Modes

Detailed guides for Automatic, Heating, Dehumidifying, Cooling, and Fan operations.

Timer and Sleep Functions

Procedures for setting and utilizing timer and sleep functions for operation control.

Air Deflector Control

Instructions on adjusting the air deflector for airflow direction.

System Diagrams and Technical Information

Construction and Dimensional Diagrams

Visual representation of the unit's structure, dimensions, and installation spaces.

Wiring and Circuit Diagrams

Electrical wiring and circuit diagrams for system troubleshooting and understanding.

Block and Refrigerant Cycle Diagrams

High-level system blocks and refrigerant flow diagrams for operational understanding.

Main Circuit Operation Description

Explanation of the operation of key circuits like ON/OFF, reset, and buzzer.

Maintenance, Service, and Troubleshooting

Routine Maintenance and Inspection

Procedures for cleaning filters, front panel, and regular inspection points.

After Sale Service and Warranty

Information regarding service requests, warranty, and points to check before calling for service.

Service Call Q&A

Common questions and answers related to cooling, dehumidifying, and heating operations.

Troubleshooting Guide

A systematic guide to diagnose and resolve common operational faults and errors.