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Hitachi RAS-8FS3 User Manual

Hitachi RAS-8FS3
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Models
<Indoor Units>
In-the-Ceiling Type
RPI-0.8FSG1 RPI-2.5FSG1 RPI-8FSG1
RPI-1.0FSG1 RPI-3.0FSG1 RPI-10FSG1
RPI-1.5FSG1 RPI-4.0FSG1
RPI-2.0FSG1 RPI-5.0FSG1
4-Way Cassette Type
RCI-1.0FSG2 RCI-2.5FSG2 RCI-5.0FSG2
RCI-1.5FSG2 RCI-3.0FSG2
RCI-2.0FSG2 RCI-4.0FSG2
2-Way Cassette Type
RCD-1.0FSG1 RCD-2.5FSG1 RCD-5.0FSG1
RCD-1.5FSG1 RCD-3.0FSG1
RCD-2.0FSG1 RCD-4.0FSG1
•Wall Type
RPK-1.0FSGM6 RPK-2.0FSGM6
RPK-1.5FSGM6 RPK-2.3FSGM6
Floor Type
RPF-1.0FSG(E) RPF-1.5FSG(E)
Floor Concealed Type
RPFI-1.0FSG(E) RPFI-1.5FSG(E)
Ceiling Type
RPC-2.0FSG1 RPC-3.0FSG1 RPC-5.0FSG1
RPC-2.5FSG1 RPC-4.0FSG1
<Outdoor Units>
FSG(1) Series
RAS-5FSG RAS-16FSG RAS-24FSG1
RAS-8FSG RAS-20FSG RAS-30FSG1
RAS-10FSG
•FS3, FS5 Series
RAS-5FS3 RAS-16FS3 RAS-24FS5
RAS-8FS3 RAS-20FS3 RAS-30FS5
RAS-10FS3
FXG Series
RAS-8FXG RAS-10FXG
FX3 Series
RAS-8FX3 RAS-10FX3
<System Equipment>
•Total Heat Exchangers
KPI-2521 KPI-5021 KPI-8021 KPI-10021
This service mamual provides the technical
information for the HITACHI Inverter-Driven
Multi-Split System Heat Pump Air
Conditioners, “SET FREE, FSG(1)/FS3, FS5
and FXG/FX3 Series”.
Read this manual carefully before starting
service activities.
HITACHI INVERTER-DRIVEN
MULTI-SPLIT SYSTEM
HEAT PUMP AIR CONDITIONERS
SET FREE FSG(1)/FS3, FS5 SERIES
AND
SET FREE FXG/FX3 SERIES
P5413553

Table of Contents

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Hitachi RAS-8FS3 Specifications

General IconGeneral
TypeSplit System
Cooling Capacity2.5 kW
Heating Capacity2.8 kW
Power Supply220-240V, 50Hz
RefrigerantR410A
Indoor Unit Weight9 kg
Noise Level (Outdoor)50 dB(A)

Summary

Troubleshooting

Initial Troubleshooting

Basic troubleshooting steps including switch settings and electrical wiring checks.

Troubleshooting Procedure

Systematic diagnosis using alarm codes and check modes.

Procedure of Checking Each Main Parts

Detailed checks for individual components and PCBs.

Test Run

Procedures for verifying system operation after installation or repair.

Servicing

Outdoor Unit

Procedures for servicing and disassembling outdoor unit components.

In-the-Ceiling Type (RPI-0.8FSG1 to RPI-5.0FSG1)

Specific servicing steps for RPI In-the-Ceiling models.

In-the-Ceiling Type (RPI-8FSG1 and RPI-10FSG1)

Servicing procedures for larger RPI In-the-Ceiling models.

4-Way Cassette Type

Servicing procedures for 4-Way Cassette type indoor units.

2-Way Cassette Type

Servicing procedures for 2-Way Cassette type indoor units.

Wall Type

Servicing procedures for Wall Type indoor units.

Floor Type

Servicing procedures for Floor Type indoor units.

Floor Concealed Type

Servicing procedures for Floor Concealed type indoor units.

Ceiling Type

Servicing procedures for Ceiling Type indoor units.

Total Heat Exchanger

Information about the structure and parts of the total heat exchanger.

Cleaning Indoor Unit Heat Exchanger

Detailed steps for cleaning indoor unit heat exchangers.

Collecting Refrigerant for Replacing Indoor Unit

Procedures for collecting refrigerant for indoor unit replacement.

Main Parts

Inverter

Details on inverter specifications, protection, and control functions.

AC Chopper

Explanation of AC Chopper control for fan speed and its specifications.

Auto-Louver Mechanism

Description of the auto-louver mechanism for various cassette types.

Scroll Compressor

Details on scroll compressor mechanism, structure, and types.

Thermistor

Information on thermistors used in indoor and outdoor units.

Electronic Expansion Valve

Specifications and operation of electronic expansion valves.

Pressure Sensor

Details on high and low pressure sensor functions and characteristics.

High Pressure Protection Device

Explanation of the high pressure protection device and its circuit.

Noise Filter (NF)

Information on the noise filter's purpose and specifications.

Capacitor (CB1, CB2)

Specifications for capacitors used in the inverter.

Reactor (DCL)

Specifications for the reactor (DCL) used in the inverter.

Optional Function

Indoor Unit

Details on optional functions for various indoor unit types.

Outdoor Unit

External signal inputs and outputs for outdoor unit control.

Remote Control Switch, PC-P1H and PC-2H2

Overview and naming of parts for remote control switches.

Wireless Remote Control Switch, PC-LH3

Components and naming of the wireless remote control switch.

7-Day Timer, PSC-5T

Usage and self-checking procedures for the 7-day timer.

Central Station, PSC-5S

Overview and operation of the central station control unit.

Troubleshooting

Initial Troubleshooting

Basic troubleshooting steps including switch settings and electrical wiring checks.

Troubleshooting Procedure

Systematic diagnosis using alarm codes and check modes.

Troubleshooting by Alarm Code

Table listing alarm codes and their leading causes.

Troubleshooting in Check Mode by Remote Control Switch

Using remote control for PCB diagnosis and data checking.

Troubleshooting by 7-Segment Display

Using the outdoor unit's 7-segment display for troubleshooting.

Function of RSW, DSWs and LEDs

Explains the function of rotary switches, dip switches, and LEDs on PCBs.

Self-Checking of PCBs using Remote Control Switch

Performing PCB self-checks using the remote control.

Self-Checking of Remote Control Switch

Procedures for self-checking the remote control switch functions.

Self-Checking of Indoor Unit PCB

Self-checking procedures for indoor unit PCBs.

Self-Checking of 7-Day Timer (PSC-3T)

Self-checking steps for the 7-day timer unit.

Self-Checking of Central Station (PSC-3S1)

Self-checking procedures for the central station.

Procedure of Checking Other Main Parts

High voltage discharge work and checks for other main parts.

Checking of Compressor

Checklist for diagnosing compressor issues and connections.

Test Run Mode by Remote Control Switch

Procedure for performing test run using the remote control.

Test Run Mode by Outdoor Unit

Procedure for performing test run using the outdoor unit dip switches.

Checking List (FSG and FS3 Series)

Checklist for test operation and sampling data for FSG/FS3 series.

Servicing

Outdoor Unit

Procedures for servicing and disassembling outdoor unit components.

In-the-Ceiling Type (RPI-0.8FSG1 to RPI-5.0FSG1)

Specific servicing steps for RPI In-the-Ceiling models.

In-the-Ceiling Type (RPI-8FSG1 and RPI-10FSG1)

Servicing procedures for larger RPI In-the-Ceiling models.

4-Way Cassette Type

Servicing procedures for 4-Way Cassette type indoor units.

2-Way Cassette Type

Servicing procedures for 2-Way Cassette type indoor units.

Wall Type

Servicing procedures for Wall Type indoor units.

Floor Type

Servicing procedures for Floor Type indoor units.

Floor Concealed Type

Servicing procedures for Floor Concealed type indoor units.

Ceiling Type

Servicing procedures for Ceiling Type indoor units.

Total Heat Exchanger

Information about the structure and parts of the total heat exchanger.

Cleaning Indoor Unit Heat Exchanger

Detailed steps for cleaning indoor unit heat exchangers.

Collecting Refrigerant for Replacing Indoor Unit

Procedures for collecting refrigerant for indoor unit replacement.

Main Parts

Inverter

Details on inverter specifications, protection, and control functions.

AC Chopper

Explanation of AC Chopper control for fan speed and its specifications.

Auto-Louver Mechanism

Description of the auto-louver mechanism for various cassette types.

Scroll Compressor

Details on scroll compressor mechanism, structure, and types.

Thermistor

Information on thermistors used in indoor and outdoor units.

Electronic Expansion Valve

Specifications and operation of electronic expansion valves.

Pressure Sensor

Details on high and low pressure sensor functions and characteristics.

High Pressure Protection Device

Explanation of the high pressure protection device and its circuit.

Noise Filter (NF)

Information on the noise filter's purpose and specifications.

Capacitor (CB1, CB2)

Specifications for capacitors used in the inverter.

Reactor (DCL)

Specifications for the reactor (DCL) used in the inverter.

Optional Function

Indoor Unit

Details on optional functions for various indoor unit types.

Outdoor Unit

External signal inputs and outputs for outdoor unit control.

Remote Control Switch, PC-P1H and PC-2H2

Overview and naming of parts for remote control switches.

Wireless Remote Control Switch, PC-LH3

Components and naming of the wireless remote control switch.

7-Day Timer, PSC-5T

Usage and self-checking procedures for the 7-day timer.

Central Station, PSC-5S

Overview and operation of the central station control unit.

Field Work Instruction

Burnt-out Compressor due to Insufficient Refrigerant Charge

Troubleshooting example of compressor failure due to low refrigerant.

Insufficient Cooling Performance When A Long Piping Is Applied

Diagnosing and resolving cooling issues with long piping installations.

Abnormally High Operating Sound [In-the-Ceiling Type Indoor Unit]

Troubleshooting high operating sound in ceiling type units.

Alarm Code “31”

Troubleshooting steps for Alarm Code "31" related to unit combination.

Not Cooling Well due to Insufficient Installation Space for Outdoor Unit

Addressing cooling issues caused by inadequate outdoor unit installation space.

Attention for SET-FREE FXG/FX3 Series

Important considerations for FXG/FX3 series installation and operation.

Piping Length of Farthest Indoor Unit

Guidelines on piping length for farthest indoor units.

Start-Up in Simultaneous COOL/HEAT Operation Mode

Considerations for starting up in simultaneous COOL/HEAT mode.

Attention for Automatic COOL/HEAT Operation

Precautions for automatic COOL/HEAT operation.

Attention for Installing CH Unit

Important considerations for installing CH units.

Select Guide of Drain Pipe for Indoor Unit

Guide for selecting appropriate drain pipe diameters based on flow volume.

Caution on Refrigerant Leakage

Safety precautions and calculations regarding refrigerant concentration and leakage.

Maintenance Work

General maintenance checks for indoor and outdoor units.

Service & Maintenance Record by 7-Segment Display

Data sheet for recording service and maintenance using the 7-segment display.

Service & Maintenance Record by Remote Control Switch

Data sheet for recording service and maintenance via remote control.

Service & Maintenance Record

General service and maintenance record log.

Electric Wiring Diagram

Location of Main Parts

Diagram showing the location of key parts in outdoor units.

Control System

REFRIGERANT CYCLE (EXAMPLE: RAS-10FXG)

Detailed refrigerant cycle diagram and component list for a specific model.

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