Hitachi RAI-ECPM User Manual

NO. 0401E
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
ROOM AIR CONDITIONER
INDOOR UNIT
MARCH 2008 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)
RAI-25NH5A
DC INVERTER (CEILING CASSETTE TYPE)
TYPE
MODEL
POWER SOURCE
TOTAL INPUT
TOTAL AMPERES
CAPACITY
TOTAL INPUT
TOTAL AMPERES
CAPACITY
DIMENSIONS
(mm)
NET WEIGHT
SPECIFICATIONS
580
285
580
20
RAI-ECPM
RAI-25NH5A
RAI-35NH5A
RAI-50NH5A
CONTENTS
SPECIFICATIONS ---------------------------------------------------------- 4
HOW TO USE -------------------------------------------------------------- 6
CONSTRUCTION AND DIMENSIONAL DIAGRAM ------------------- 27
MAIN PARTS COMPONENT -------------------------------------------- 28
WIRING DIAGRAM ------------------------------------------------------- 29
CIRCUIT DIAGRAM ------------------------------------------------------ 31
BLOCK DIAGRAM -------------------------------------------------------- 35
BASIC MODE ------------------------------------------------------------- 37
REFRIGERATING CYCLE DIAGRAM ----------------------------------- 51
AUTO SWING FUNCTION ----------------------------------------------- 53
DESCRIPTION OF MAIN CIRCUIT OPERATION --------------------- 54
SERVICE CALL Q & A --------------------------------------------------- 58
TROUBLE SHOOTING --------------------------------------------------- 62
PARTS LIST AND DIAGRAM ------------------------------------------- 66
RAI-25NH5A
RAI-35NH5A
RAI-50NH5A
COOLING
HEATING
INDOOR UNIT
1 PHASE, 50 Hz, 220-240V
RAI-50NH5A
NOTE:
This manual describes only points that differ from
RAK-18NH5, 25NH5, 35NH5 (PM NO. 0269E) and
RAM-40QH5 (PM NO. 0270E) for items not described
in this manual.
REFER TO THE SPECIFICATIONS PAGE (5)
RAI-35NH5A

Hitachi RAI-ECPM Specifications

General

Brand	Hitachi
Model	RAI-ECPM
Category	Air Conditioner
Language	English

Summary

Safety and Handling Procedures

Safety During Repair Work

Essential safety rules for personnel performing maintenance or repairs on the unit.

Semiconductor Handling Standards

Guidelines for preventing static damage to semiconductor components during handling.

General Safety Precautions

Comprehensive safety instructions for installation, shifting, maintenance, and operation.

Technical Specifications and Diagrams

Product Specifications

Details technical characteristics and performance data for the air conditioner models.

Construction and Dimensional Diagram

Visual representation of the unit's physical layout, dimensions, and piping connections.

Wiring and Circuit Diagrams

Schematic showing electrical connections and detailed circuit schematics for troubleshooting.

Block Diagrams

High-level overview of the indoor unit's functional blocks and interconnections.

Operation Modes and Controls

Indoor Unit and Remote Control Functions

Explains the parts of the indoor unit and the operation of the remote control for managing functions.

Operating Modes Overview

Details on automatic, heating, cooling, dehumidifying, and fan-only modes.

Timer and Sleep Timer Settings

Instructions for setting and using the timer functions for automated operation scheduling.

Auto Swing Function

Describes how to control the air deflector's movement for optimal air distribution.

Maintenance, Troubleshooting, and Parts

Maintenance and Service Information

Steps for cleaning, preparation for storage, and service call procedures.

Troubleshooting Common Issues

Addresses common operational problems with Q&A and diagnostic guides for faults.

Electrical Parts Troubleshooting

Step-by-step guide for troubleshooting power and operation issues with electrical components.

Parts List and Diagrams

Comprehensive list of all replaceable parts for the indoor unit with their numbers.