Hitachi RCI User Manual

Check that the condensate discharge system in the indoor unit works correctly. To do so, check the level of the drain pan
using a spirit level or a clear flexible pipe full of water. The side of the unit on which the drain hose is located must be around
5 mm lower than the front side.
Once adjusted, tighten the suspension bracket nuts.
Apply a thread-locking product to the bolts and nuts to prevent them from loosening. Otherwise, abnormal noise may be
caused by mechanical vibrations and the indoor unit may become loose.
Apply protective paint to the bolts and nuts to prevent rusting.
Secure the drain hose with the clamp and adhesive supplied.
C A U T I O N
Completely cover the unit with a sheet of plastic to protect it during installation work.
2.6.3 Air duct connection
N O T E
• Use field-supplied flexible ducts to avoid abnormal acoustic vibrations.
• RPI units are supplied with a standard air filter on the suction side. This filter is supplied for cases where no
suction duct is applied (or when the duct is very short).
Secure the flexible air duct to the outsides of the hoses supplied with the unit.
Bear in mind the following instructions depending on the installation
type:
1 Where the suction duct is not used, keep the standard air filter.
2 Where the suction duct is used, fit the air filter at the suction
duct inlet point, removing the standard air filter from the unit.
This air filter must be field-supplied or a factory-adapted one must be used.
2.6.4 Maintenance of the suction air filter
Simply remove the set screws from the bar -1- (RPIM units: 2
screws, RPI units: 3 screws) and remove it to pull the filter
downwards.
2 Unit installation
49
SMGB0063 rev. 1 - 10/2010
2

Hitachi RCI Specifications

General

Brand	Hitachi
Model	RCI
Category	Air Conditioner
Language	English

Summary

General Information and Safety

Safety Symbols and Precautions

Explains safety symbols (Danger, Caution, Note) and general safety guidelines for unit installation and operation.

Unit Installation

RCI 4-way Cassette Unit Installation

RPI/RPIM Ducted Unit Installation

RPK Wall Mounted Unit Installation

RPF/RPFI Floor Unit Installation

Piping Work and Refrigerant Charge

Gas Refrigerant Pipe Selection

Guidelines for selecting correct gas refrigerant pipe sizes based on outdoor unit power.

Copper Pipe Specifications and Connections

Refrigerant and Drain Hose Installation

Specific instructions for installing refrigerant pipes and drain hoses for various indoor unit types.

Electrical Wiring

Unit Electrical Wiring and Connection

General guidelines for wiring, main switch selection, and power cable sizing.

Setting of DIP switches and RSW switches

Control System

Device Control System Overview

Explains the purpose of control for compressor, expansion valves, fans, and solenoid valves.

Test Run

Pre-Test Run Checks and Procedures

Essential checks and procedures before performing the system test run.

Test Procedure with Remote Control

Step-by-step guide for conducting the test run using a wired remote control.

Test Run Checklist

Troubleshooting

RPK Unit PCB Self-Check

Procedure for self-checking the indoor unit PCB using relays and DIP switches.

Electronic Expansion Valve Check Procedure

Servicing Procedures

RCI 4-way Cassette Servicing

Step-by-step guide for removing components of RCI 4-way cassette units.

RCIM Compact Cassette Servicing

Step-by-step guide for removing components of RCIM compact cassette units.

RCD 2-way Cassette Servicing

RPK Wall Mounted Unit Servicing

RPF(I) Floor Unit Servicing

Electrical Checks of Main Parts

Thermistor Electrical Checks

Electronic Expansion Valve Checks

Maintenance Notes

Regular Equipment Maintenance Procedures

Indoor Heat Exchanger Cleaning Guide

Refrigerant Collection for Replacement

Procedure for safely collecting refrigerant when replacing an indoor unit.