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Hitachi RAS-(4-6)HVRNS2E User Manual

Hitachi RAS-(4-6)HVRNS2E
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Printed in SpainSMGB0064 rev.0 - 08/2011
Hitachi air conditioning products are manufactured according to:
ISO 9001 of JQA, Japan for its Quality Management accordance with the
standard
ISO 14001 of JACO, Japan for its Environmental Management accordance with
the standard
Hitachi Air Conditioning Products Europe, S.A. is certified with:
ISO 9001 of AENOR, Spain for its Quality Management accordance with the
standard
ISO 14001 of AENOR Spain for its Environmental Management systems
accordance with the standard
Hitachi certifies that our products have met EU consumer safety, health and
environmental requirements.
Hitachi Air Conditioning Products Europe, S.A.
Ronda Shimizu, 1 - Polig. Ind. Can Torrella
08233 Vacarisses (Barcelona) Spain
HITACHI participates in the Eurovent Certification Programme; the certified
data of certified models are listed in the Eurovent Certification Online Directory
(www.eurovent-certification.com).
SMGB0064 rev. 0 - 08/2011
Service Manual
UTOPIA DC-INVERTER IVX/(2/2.5)HP/ES SERIES
H(V)RN(S)(2)(E)
H(V)RNM(2)(E)
UTOPIA DC-INVERTER IVX/(2/2.5)HP/ES SERIES
RAS-(3-6)HVRNM2E
RAS-(4-12)HRNM(2)(E)
RAS-(2-3)HVRN(S)(2)
RAS-(4-6)HVRNS2E
RAS-(4-10)HRNS(2)E

Table of Contents

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Hitachi RAS-(4-6)HVRNS2E Specifications

General IconGeneral
Cooling Capacity (kW)4.0-6.0
SEER6.1
SCOP4.0
Energy Efficiency CoolingA++
Energy Efficiency HeatingA+
RefrigerantR32
Power Supply220-240V, 50Hz
Coefficient of Performance (COP)3.8
Outdoor Unit Dimensions (W x H x D)800 x 550 x 285 mm
Indoor Unit Weight11 kg
Outdoor Unit Weight35 kg
TypeSplit system
Noise Level (Outdoor Unit)50 ~ 55 dB(A)
Energy Efficiency Ratio (EER)3.2 ~ 3.5

Summary

General Information

General Information Details

General notes, introduction to series, and environment-friendly aspects.

Applied Symbols

Explanation of symbols used for safety and general information in the manual.

Product Guide

Classification and product guide for IVX and ES series outdoor unit models.

Unit Installation

Safety Summary

Summary of safety precautions for unit installation, including danger and caution points.

Transportation of Outdoor Unit

Guidelines for safely transporting the outdoor unit, including hanging methods.

Center of Gravity

Information on the center of gravity for hanging and moving the outdoor unit.

Factory-Supplied Accessories

Details of factory-supplied accessories for specific RAS models.

Installation Space Requirements

Requirements for installation space around outdoor units for various models and configurations.

Place Provision and Foundation

Requirements for installation location and foundation, including drainage considerations.

Optional Parts and Installation

Installation procedures for optional accessories like air flow guides, wind guards, and snow protection hoods.

Piping Work and Refrigerant Charge

General Notes on Piping and Drainage

General notes on drain piping, connections, and insulation requirements.

Piping Work Connection Considerations

Considerations for piping materials, connection methods, brazing, and insulation.

Outdoor Units IVX Series Piping

Piping connection details for IVX series outdoor units, including different connection directions.

Outdoor Units ES Series Piping

Piping connection details for ES series outdoor units.

Electrical Wiring

General Electrical Check

General checks before installing electrical wiring, including safety precautions.

IVX Series Outdoor Unit Electrical Wiring

Electrical wiring connections and DIP switch settings for IVX series outdoor units.

ES Series Outdoor Unit Electrical Wiring

Electrical wiring connections and DIP switch settings for ES series outdoor units.

Indoor and Outdoor Unit Electrical Wiring

Guidelines for connecting electrical wires between indoor and outdoor units, including H-LINK system.

Wire Size Specifications

Recommended wire sizes for power and transmitting cables based on current and series.

Electrical Wiring Diagrams

Electrical wiring diagrams for IVX and ES series outdoor units.

Control System

Device Control System Overview

Explanation of control systems for IVX and ES series, detailing component functions in different modes.

Outdoor Unit PCBs

Identification and indication details for outdoor unit PCBs for IVX and ES series.

Protection and Safety Control Measures

Details on protection and safety controls for IVX and ES series outdoor units.

Standard Operation Sequences

Flowcharts illustrating standard operation sequences for cooling, heating, and defrosting in IVX and ES series.

Standard Control Functions

Standard control functions for IVX and ES series, including freezing protection and high discharge gas temperature prevention.

Optional Functions

IVX and ES Series Outdoor Units Optional Ports

Details on available ports and configuration for optional functions on IVX and ES series outdoor units.

Test Run Procedures

Pre-Test Run Checks

Pre-test run checks, including wiring, refrigerant, settings, and safety.

Test Run Procedure with Wired Remote Control

Step-by-step guide for performing a test run using a wired remote control switch.

Test Run Procedure with Wireless Remote Control

Procedure for conducting a test run using a wireless remote control switch.

Test Run Procedure from Outdoor Unit Side

Steps for performing a test run directly from the outdoor unit's DIP switches.

Test Run Checklists

Checklists for verifying correct operation and parameters of IVX and ES series units during test runs.

Troubleshooting Guide

Initial Troubleshooting for IVX and ES Series

Initial troubleshooting steps for IVX and ES series, focusing on 7-segment display indications and power supply issues.

Troubleshooting Procedures for IVX and ES Series

Procedures for troubleshooting IVX and ES series, covering alarm codes, check modes, and specific fault causes.

Checking Main Parts Procedures

Procedures for checking main components like PCBs, remote controls, and specific parts using self-checking methods.

Spare Parts Information

Spare Parts for IVX Series

List and diagrams of spare parts for IVX series outdoor units.

Spare Parts for ES Series

List and diagrams of spare parts for ES series outdoor units.

Servicing Procedures

Servicing Introduction

Introduction to servicing operations, including safety precautions and general notes.

Servicing for IVX Series

Detailed servicing procedures for IVX series outdoor units, including component removal steps.

Servicing for ES Series

Servicing procedures for ES series outdoor units, covering component removal steps.

Electrical Checks of Main Parts

Inverter Specifications and Protection

Specifications and protective functions for inverters in IVX and ES series.

Thermistor Information

Information on thermistors for outdoor units, including their locations and resistance characteristics.

Electronic Expansion Valve Operation

Details on the operation, specifications, and wiring of electronic expansion valves.

High Pressure Protection Device

Explanation of the high-pressure protection device and its gas by-pass circuit.

Noise Filter Specifications

Specifications and circuit diagrams for noise filters used in 3-phase and 1-phase power supplies.

Capacitor Specifications

Specifications for capacitors used in the inverter circuit.

Reactor (DCL) Specifications

Specifications for reactors used in 3-phase and 1-phase inverter circuits.

Scroll Compressor Principles

Information on the reliable mechanism and principle of compression for scroll compressors.

Maintenance Notes

Checking Power Source and Wiring Connection

Procedure for checking power source and wiring connections for abnormal operations.

Compressor Failure Due to Insufficient Refrigerant

Analysis of burnt-out compressors due to insufficient refrigerant charge, including a field example.

Insufficient Cooling with Long Piping

Diagnosis and countermeasures for insufficient cooling performance related to long piping installations.

Abnormally High Operation Sound

Troubleshooting high operation sound in ceiling-type indoor units, often related to installation or airflow.

Alarm Code "31" Troubleshooting

Explanation and countermeasure for Alarm code "31", related to indoor unit capacity settings.

Poor Cooling Due to Insufficient Outdoor Unit Space

Troubleshooting poor cooling performance caused by insufficient installation space for outdoor units.

Refrigerant Leakage Precautions

Precautions regarding refrigerant leakage, permissible concentrations, calculation, and countermeasures.

General Maintenance Procedures

General maintenance procedures for indoor and outdoor units, covering fans, heat exchangers, piping, and electrical components.

Service and Maintenance Records

Forms for recording service and maintenance activities.

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