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Hitachi RPI-4.0FSG1 User Manual

Hitachi RPI-4.0FSG1
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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 RPI-4.0FSG1 Specifications

General IconGeneral
BrandHitachi
ModelRPI-4.0FSG1
CategoryAir Conditioner
LanguageEnglish

Summary

SERVICE MANUAL

TROUBLESHOOTING

1. TROUBLESHOOTING

Comprehensive guide for identifying and resolving operational issues.

1.1 Initial Troubleshooting

Basic steps for troubleshooting, including switch settings and initial checks.

1.1.1 Rotary Switch and Dip Switch Setting

Details on setting rotary and dip switches for indoor and outdoor units.

1.1.2 Checking of Electrical Wiring

Guidelines for checking electrical wiring connections and cable types.

1.1.3 Checking by 7-Segment Display

Simple checking method using the outdoor unit's 7-segment LED display.

1.1.4 Emergency Operation when Inverter Compressor is Damaged

Procedure for emergency operation when the inverter compressor is failed.

1.1.5 Failure of Power Supply to Indoor Unit and Remote Control Switch

Troubleshooting steps for power supply failures affecting indoor units and controls.

1.1.6 Abnormal Transmission between Remote Control Switch and Indoor Unit

Diagnosing issues with abnormal transmission between controls and indoor units.

1.1.7 Abnormalities of Devices

Troubleshooting common abnormalities of various system devices.

1.2 Troubleshooting Procedure

Systematic procedures for diagnosing issues using alarm codes and check modes.

1.2.1 Alarm Code Table

List of alarm codes and their corresponding contents of abnormality and leading causes.

1.2.2 Troubleshooting by Alarm Code

Detailed steps to troubleshoot issues identified by alarm codes.

1.2.3 Troubleshooting in Check Mode by Remote Control Switch

Using check mode on remote control to diagnose issues.

1.2.4 Troubleshooting by 7-Segment Display

Diagnosing issues using the outdoor unit's 7-segment display.

1.2.5 Function of RSW, DSWs and LEDs

Understanding the functions of rotary switches, dip switches, and LEDs on PCBs.

1.3 Procedure of Checking Each Main Parts

Steps for checking individual components like PCBs and remote controls.

1.3.1 Self-Checking of PCBs using Remote Control Switch

Procedure for self-diagnosing PCBs using the remote control switch.

1.3.2 Self-Checking of Remote Control Switch

Steps to perform self-checking on the remote control switch.

1.3.3 Self-Checking of Indoor Unit PCB

Procedure for self-checking indoor unit PCBs.

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

Steps for self-checking the 7-Day Timer unit.

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

Procedure for self-checking the Central Station.

1.3.6 Procedure of Checking Other Main Parts

Steps for checking other critical main parts of the system.

1.4 Test Run

Procedures for performing test runs using remote control or outdoor unit.

1.4.1 Test Run Mode by Remote Control Switch

Steps to set and perform test run mode using the remote control switch.

1.4.2 Test Run Mode by Outdoor Unit

Procedures for performing test run mode using the outdoor unit's dip switches.

1.4.3 Checking List (FSG and FS3 Series)

Checklist for test operations specific to FSG and FS3 series.

SERVICING

2. SERVICING

Comprehensive guide to servicing and maintenance procedures.

2.1 Outdoor Unit

Procedures for servicing and disassembling the outdoor unit components.

2.1.1 Removing Air Intake Grille

Steps to remove the air intake grille from the outdoor unit.

2.1.2 Removing Front Service Panel

Procedure for removing the front service panel for access to outdoor unit components.

2.1.3 Removing Fan Guard Nets

Instructions for removing the fan guard nets from the outdoor unit.

2.1.4 Removing Outdoor Fan

Steps to remove the propeller fan and motor from the outdoor unit.

2.1.5 Removing Compressor (RAS-5FSG and RAS-5FS3)

Procedure for removing the compressor for specific outdoor unit models.

2.1.7 Removing Compressors for MC1 and MC2

Steps for removing compressors for MC1 and MC2 outdoor units.

2.1.8 Removing Compressors for MC3 and MC4

Procedure for removing compressors for MC3 and MC4 outdoor units.

2.1.9 Removing High Pressure Switch, High Pressure Sensor and Low Pressure Sensor

Steps to remove pressure sensors and switches from the outdoor unit.

2.1.10 Removing Coil for Reversing Valve Coil

Procedure for removing the coil for the reversing valve.

2.1.11 Removing Coil for Solenoid Valve Coil

Steps to remove the solenoid valve coil.

2.1.12 Removing Thermistor for Liquid Pipe

Procedure for removing the thermistor for the liquid pipe.

2.1.14 Removing Reversing Valve (RAS-24FSG1, RAS-30FSG1, RAS-24FS5 and RAS-30FS5)

Procedure for removing the reversing valve for specific models.

2.1.16 Removing Electrical Components (RAS-24FSG1, RAS-30FSG1, RAS-24FS5 and RAS-30FS5)

Procedure for removing electrical components for specific outdoor unit models.

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

Servicing procedures for RPI-0.8FSG1 to RPI-5.0FSG1 indoor units.

2.2.1 Removing Long Life Filter

Steps to remove the long life filter from the indoor unit.

2.2.2 Removing Printed Circuit Board (PCB)

Procedure for removing the printed circuit board from the indoor unit.

2.2.3 Removing Indoor Fan and Fan Motor

Steps to remove the indoor fan and fan motor assembly.

2.2.4 Removing Thermistor for Liquid Piping and Gas Piping

Procedure for removing thermistors for liquid and gas pipes.

2.2.5 Removing Electronic Expansion Valve Coil

Steps to remove the electronic expansion valve coil.

2.2.6 Removing Float Switch

Procedure for removing the float switch.

2.2.7 Removing Drain Pump

Steps to remove the drain pump from the indoor unit.

2.2.8 Removing Drain Pan

Procedure for removing the drain pan from the indoor unit.

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

Servicing procedures for RPI-8FSG1 and RPI-10FSG1 indoor units.

2.3.1 Removing Long Life Filter

Steps to remove the long life filter.

2.3.2 Removing Printed Circuit Board (PCB)

Procedure for removing the printed circuit board.

2.3.3 Removing Indoor Fan and Fan Motor

Steps to remove the indoor fan and fan motor.

2.3.4 Removing Electronic Expansion Valve and Thermistors

Procedure for removing electronic expansion valve and thermistors.

SERVICING

2.4 4-Way Cassette Type

Servicing procedures for the 4-Way Cassette Type indoor units.

2.4.1 Removing Long Life Filter

Steps to remove the long life filter.

2.4.2 Removing Air Intake Grille

Procedure for removing the air intake grille.

2.4.3 Removing Electrical Box Cover

Steps to remove the electrical box cover.

2.4.4 Removing Optional Air Panel

Procedure for removing the optional air panel.

2.4.5 Removing Fan Runner and Fan Motor

Steps to remove the fan runner and fan motor assembly.

2.4.6 Removing Bell-Mouth

Procedure for removing the bell-mouth.

2.4.7 Removing Printed Circuit Board (PCB)

Steps to remove the printed circuit board.

2.4.8 Removing Drain Pan

Procedure for removing the drain pan.

2.4.9 Removing Drain-Up Mechanism

Steps to remove the drain-up mechanism.

2.4.10 Removing Float Switch

Procedure for removing the float switch.

2.4.11 Removing Thermistors for Liquid Pipe and Gas Pipe

Steps to remove thermistors for liquid and gas pipes.

2.4.12 Removing Electronic Expansion Valve Coil

Procedure for removing the electronic expansion valve coil.

2.4.13 Removing Automatic Louver Motor

Steps to remove the automatic louver motor.

2.5 2-Way Cassette Type

Servicing procedures for the 2-Way Cassette Type indoor units.

2.5.1 Removing Long Life Filter and Air Intake Grille

Steps to remove the long life filter and air intake grille.

2.5.2 Removing Electrical Box Cover

Procedure for removing the electrical box cover.

2.5.3 Removing Optional Air Panel

Steps to remove the optional air panel.

2.5.4 Removing Fan Runner and Fan Motor

Procedure for removing the fan runner and fan motor.

2.5.5 Removing Printed Circuit Board (PCB)

Steps to remove the printed circuit board.

2.5.6 Removing Float Switch

Procedure for removing the float switch.

2.5.7 Removing Drain-Up Mechanism

Steps to remove the drain-up mechanism.

2.5.8 Removing Drain Pan

Procedure for removing the drain pan.

2.5.9 Removing Thermistors for Liquid and Gas Pipes

Steps to remove thermistors for liquid and gas pipes.

2.5.10 Removing Electronic Expansion Valve Coil

Procedure for removing the electronic expansion valve coil.

2.5.11 Removing Automatic Louver Motor

Steps to remove the automatic louver motor.

2.6 Wall Type

Servicing procedures for Wall Type indoor units.

2.6.1 Removing Air Filter

Steps to remove the air filter.

2.6.2 Removing Front Panel

Procedure for removing the front panel.

2.6.3 Removing Motor for Automatic Louver

Steps to remove the motor for automatic louver.

2.6.4 Removing Thermistors for Liquid Pipe, Gas Pipe, Discharge Air and Suction Air

Procedure for removing thermistors for various pipes and air.

2.6.5 Removing Electrical Box Cover

Steps to remove the electrical box cover.

2.6.6 Removing Indoor PCB

Procedure for removing the indoor PCB.

2.6.7 Removing Drain Pan

Steps to remove the drain pan.

2.6.8 Removing Heat Exchanger

Procedure for removing the heat exchanger.

2.6.9 Removing Fan and Fan Motor

Steps to remove the fan and fan motor.

2.6.10 Removing Electronic Expansion Valve Coil

Procedure for removing the electronic expansion valve coil.

SERVICING

2.7 Floor Type

Servicing procedures for Floor Type indoor units.

2.7.1 Removing Air Intake Grille

Steps to remove the air intake grille.

2.7.2 Removing Air Filter

Procedure for removing the air filter.

2.7.3 Removing Discharge Air Grille

Steps to remove the discharge air grille.

2.7.4 Removing Front Cover

Procedure for removing the front cover.

2.7.5 Removing Fan Motor

Steps to remove the fan motor.

2.7.6 Removing Printed Circuit Board (PCB)

Procedure for removing the printed circuit board.

2.7.7 Removing Thermistors for Liquid Pipe and Gas Pipe

Steps to remove thermistors for liquid and gas pipes.

2.8 Floor Concealed Type

Servicing procedures for Floor Concealed Type indoor units.

2.8.1 Removing Air Filter

Steps to remove the air filter.

2.8.2 Removing Front Covers

Procedure for removing the front covers.

2.8.3 Removing Fan Motor

Steps to remove the fan motor.

2.8.4 Removing Printed Circuit Board (PCB)

Procedure for removing the printed circuit board.

2.8.5 Removing Thermistors for Liquid Pipe and Gas Pipe

Steps to remove thermistors for liquid and gas pipes.

2.9 Ceiling Type

Servicing procedures for Ceiling Type indoor units.

2.9.1 Removing Air Filter and Air Intake Grille

Steps to remove the air filter and air intake grille.

2.9.2 Removing Side Cover

Procedure for removing the side cover.

2.9.3 Removing Discharge Air Grille

Steps to remove the discharge air grille.

2.9.4 Removing Fan Motor

Procedure for removing the fan motor.

2.9.5 Removing Bearing

Steps to remove the bearing.

2.9.6 Removing Coupling

Procedure for removing the coupling.

2.9.7 Removing Automatic Louver Motor

Steps to remove the automatic louver motor.

2.9.9 Checking Procedures for Electronic Expansion Valve Coil

Steps to check the electronic expansion valve coil.

2.9.10 Removing Printed Circuit Board (PCB)

Procedure for removing the printed circuit board.

2.10 Total Heat Exchanger

Information on the total heat exchanger unit.

2.10.1 Structure

Overview of the total heat exchanger's structure and components.

2.10.2 Removing Electrical Parts

Steps to remove electrical parts from the heat exchanger.

2.10.3 Removing Air Filter and Total Heat Exchanger Element

Procedure for removing the air filter and heat exchanger element.

2.10.4 Removing Fan Motor

Steps to remove the fan motor.

2.10.5 Air Filter Cleaning

Instructions for cleaning the air filter.

2.10.6 Total Heat Exchanger Cleaning

Procedure for cleaning the total heat exchanger element.

2.11 Cleaning Indoor Unit Heat Exchanger

Guidelines for cleaning indoor unit heat exchangers.

2.11.1 Required Tools for Cleaning (for All Indoor Units)

List of tools and materials needed for cleaning all indoor units.

2.11.2 In-the-Ceiling Type

Cleaning procedures specific to In-the-Ceiling Type indoor units.

2.11.3 Cleaning 4-Way Cassette Type Indoor Unit

Steps for cleaning the 4-Way Cassette Type indoor unit.

2.11.4 Cleaning 2-Way Cassette Type Indoor Unit

Procedure for cleaning the 2-Way Cassette Type indoor unit.

2.11.5 Cleaning Wall Type Indoor Unit

Steps for cleaning the Wall Type indoor unit.

2.11.6 Cleaning Floor Type and Floor Concealed Type Indoor Unit

Procedure for cleaning Floor and Floor Concealed Type units.

2.11.7 Cleaning Ceiling Type Indoor Unit

Steps for cleaning the Ceiling Type indoor unit.

2.12 Collecting Refrigerant for Replacing Indoor Unit

Procedure for collecting refrigerant when replacing an indoor unit.

MAIN PARTS

3. MAIN PARTS

Detailed information on the main components of the system.

3.1 Inverter

Specifications and arrangement details for the inverter unit.

3.1.1 Specifications of Inverter (For 380/415V, 50Hz and 380V, 60Hz Power Source)

Technical specifications for inverters operating on 380/415V and 380V power.

3.1.2 Specifications of Inverter (For 220V, 60Hz Power Source)

Technical specifications for inverters operating on 220V power.

3.1.3 Arrangement of Inverter Power Unit

Diagram showing the layout of inverter power unit components.

3.1.4 Inverter Time Chart

Time charts illustrating inverter operation sequences.

3.1.5 Protective Function

Details on the various protective functions of the inverter.

3.1.6 Overload Control

Explanation of the overload control mechanism for the inverter.

3.2 AC Chopper

Information on the AC Chopper control concept and features.

3.3 Auto-Louver Mechanism

Details on the auto-louver mechanism for different indoor unit types.

3.3.1 4-Way Cassette Type

Auto-louver operation and stoppage for 4-Way Cassette units.

3.3.2 2-Way Cassette Type

Auto-louver operation and stoppage for 2-Way Cassette units.

3.3.3 Ceiling Type

Auto-louver operation and stoppage for Ceiling Type units.

3.4 Scroll Compressor

Details on the reliable mechanism and principle of compression.

3.4.1 Reliable Mechanism for Low Vibration and Low Sound

Explanation of features contributing to low vibration and sound.

3.4.2 Principle of Compression

Step-by-step explanation of the compressor's working principle.

3.4.3 Structure

Diagrams illustrating the structure of the compressor.

3.5 Thermistor

Information on thermistors used in indoor and outdoor units.

3.5.1 Thermistor for Indoor Unit

Details on thermistor positions and characteristics for indoor units.

3.6 Electronic Expansion Valve

Information on electronic expansion valves for outdoor and indoor units.

3.6.1 Electronic Expansion Valve for Outdoor Units

Specifications, wiring, and activation mode for outdoor EEVs.

3.6.2 Electronic Expansion Valve for Indoor Units

Specifications, wiring, and activation mode for indoor EEVs.

3.7 Pressure Sensor

Details on high and low pressure sensors and their characteristics.

3.8 High Pressure Protection Device

Explanation of the high pressure protection device and its control.

3.9 Noise Filter (NF)

Specifications and circuit diagram for the noise filter.

3.10 Capacitor (CB1, CB2)

Specifications for the capacitor components.

3.11 Reactor (DCL)

Specifications for the reactor (DCL) component.

OPTIONAL FUNCTION

4. OPTIONAL FUNCTION

Details on various optional functions available for the system.

4.1 Indoor Unit

Optional functions for various indoor unit models.

4.1.1 Remote Control ON/OFF Function

Provides control to stop and start the system automatically from a remote place.

4.1.2 Power Supply ON/OFF 1 (Automatic Operation When Power Supply ON)

Automatic system start/stop based on power supply ON/OFF.

4.1.4 Control by Field-Supplied Room Thermostat

Using a field-supplied room thermostat for indoor unit control.

4.1.5 Operation Control by Remote Temperature Sensor (Except for RPK-FSGM Series)

Controlling the unit using an optional remote temperature sensor.

4.1.7 Picking Up Operation Signal

Utilizing signals to pick up operation status or interlock with fresh air fan.

4.2 Indoor Unit (For RPI (0.8 to 5.0HP), RCI, RCD, RPC (After Alteration) and KPI Series)

Input/output settings and functions for specific indoor unit series.

4.2.1 Input and Output Setting of Indoor PCB Connector

Procedures for changing settings of input/output ports on the indoor unit PCB.

4.2.2 Remote Control Thermistor Function

Using remote control thermistor for temperature control instead of indoor unit thermistor.

4.2.3 Remote Control ON/OFF Function

Provides control to stop and start the system from a remote place.

4.2.4 Power Supply ON/OFF 1 (Automatic Operation When Power Supply ON)

Automatic system start/stop based on power supply ON/OFF.

4.2.6 Control by Field-Supplied Room Thermostat (Except for KPI Series)

Using a field-supplied room thermostat for control.

4.2.7 Operation Control by Remote Temperature Sensor (Except for KPI Series)

Controlling the unit using an optional remote temperature sensor.

4.2.9 Precooling/Preheating Operation (KPI Series Only)

Delayed start of total heat exchanger at interlock with air conditioner.

4.2.10 Picking Up Operation Signal

Utilizing signals to pick up operation status or interlock with fresh air fan.

4.3 Outdoor Unit

Optional functions for the outdoor unit.

4.3.1 Demand

Control of compressor stoppage based on demand input.

4.3.2 Forced Stoppage

Procedure for forced stoppage of compressor and fan motor.

4.3.3 Demand Current Control (Only for 24 and 30HP)

Control of compressor frequency based on demand current limits.

4.3.4 Fixing Operation Mode

Fixing the operation mode to cooling or heating.

4.3.5 Snow Sensor

Function of the snow sensor for outdoor unit protection.

4.3.6 Defrosting Condition Changeover

Changing defrosting operation conditions via dip switch.

4.3.7 Indoor Fan Control during Thermo-OFF at Heating

Controlling indoor fan operation during heating thermo-OFF.

4.3.8 All Season Heating Operation

Enabling year-round heating operation.

4.3.9 All Season Cooling Operation

Enabling year-round cooling operation.

4.3.10 Night Shift (Low Sound) Operation

Setting the night shift (low sound) operation mode.

4.3.11 Picking Up Signals from Outdoor Unit Printed Circuit Board

Picking up alarm and operation signals from the outdoor unit PCB.

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

Details on the PC-P1H and PC-2H2 remote control switches.

4.4.1 Name of Part

Identification of parts on the remote control switch.

4.4.2 Simultaneous Operation

Methods for simultaneous operation of multiple indoor units.

4.4.3 Operation System with Two Remote Control Switches

Setting up an operation system with two remote control switches.

4.4.4 Optional Function Setting

Procedures for setting optional functions via dip switches.

4.4.5 Optional Functions of Remote Control Switch

Detailed explanation of various optional functions configurable via remote control.

4.4.6 Indication of Address (ADDS) and Refrigerant Cycle Number (RN)

Display of indoor unit address and refrigerant cycle number on the remote.

4.5 Wireless Remote Control Switch, PC-LH3

Details on the PC-LH3 wireless remote control switch.

4.5.1 Name of Part

Identification of parts on the wireless remote control switch.

4.5.2 Identifying of Indoor Units Installed Side By Side

Procedure to identify indoor units installed side-by-side.

4.5.3 Simultaneous Operation

Performing simultaneous operation of multiple indoor units.

4.5.4 Emergency Operation

Steps for operating the unit in emergency mode.

4.5.5 Optional Function Setting (In Case of PC-RLH4, PC-RLH5 and PC-RLH7)

Setting optional functions via dip switches on receiver kit.

4.5.6 Optional Functions of Wireless Remote Control Switch

Details on optional functions configurable via wireless remote control.

4.6 7-Day Timer, PSC-5T

Operation and self-checking procedures for the 7-Day Timer.

4.7 Central Station, PSC-5S

Features and operation of the Central Station PSC-5S.

FIELD WORK INSTRUCTION

5. FIELD WORK INSTRUCTION

Comprehensive guide for field work and installation instructions.

5.1 Burnt-out Compressor due to Insufficient Refrigerant Charge

Troubleshooting guide for compressor failure due to low refrigerant charge.

5.2 Insufficient Cooling Performance When A Long Piping Is Applied

Addressing cooling issues caused by long refrigerant piping.

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

Troubleshooting high operating sound in In-the-Ceiling indoor units.

5.4 Alarm Code “31”

Guidance for diagnosing and resolving alarm code '31'.

5.5 Not Cooling Well due to Insufficient Installation Space for Outdoor Unit

Troubleshooting poor cooling due to inadequate outdoor unit installation space.

5.6 Attention for SET-FREE FXG/FX3 Series

Important considerations for SET-FREE FXG/FX3 series system design and installation.

5.7 Select Guide of Drain Pipe for Indoor Unit

Guidance on selecting the correct drain pipe for indoor units.

5.8 Caution on Refrigerant Leakage

Safety precautions and guidelines regarding refrigerant leakage.

5.9 Maintenance Work

General maintenance tasks for indoor and outdoor units.

5.9.1 For Indoor Unit and Outdoor Unit

Maintenance checks for fan, motor, heat exchanger, piping, cabinet, and electricals.

5.9.2 For Indoor Unit

Maintenance checks for air filter, drain system, float switch, and outdoor unit.

5.9.3 For Outdoor Unit

Maintenance checks for compressor, reverse valve, strainer, earth wire, and oil heater.

5.10 Service & Maintenance Record by 7-Segment Display

Record keeping for service and maintenance using the 7-segment display.

5.11 Service & Maintenance Record by Remote Control Switch

Record keeping for service and maintenance using the remote control switch.

5.12 Service & Maintenance Record

General service and maintenance record log.

TROUBLESHOOTING

1. TROUBLESHOOTING

Comprehensive guide for identifying and resolving operational issues.

1.1 Initial Troubleshooting

Basic steps for troubleshooting, including switch settings and initial checks.

1.1.1 Rotary Switch and Dip Switch Setting

Details on setting rotary and dip switches for indoor and outdoor units.

1.1.2 Checking of Electrical Wiring

Guidelines for checking electrical wiring connections and cable types.

1.1.3 Checking by 7-Segment Display

Simple checking method using the outdoor unit's 7-segment LED display.

1.1.4 Emergency Operation when Inverter Compressor is Damaged

Procedure for emergency operation when the inverter compressor is failed.

1.1.5 Failure of Power Supply to Indoor Unit and Remote Control Switch

Troubleshooting steps for power supply failures affecting indoor units and controls.

1.1.6 Abnormal Transmission between Remote Control Switch and Indoor Unit

Diagnosing issues with abnormal transmission between controls and indoor units.

1.1.7 Abnormalities of Devices

Troubleshooting common abnormalities of various system devices.

1.2 Troubleshooting Procedure

Systematic procedures for diagnosing issues using alarm codes and check modes.

1.2.1 Alarm Code Table

List of alarm codes and their corresponding contents of abnormality and leading causes.

1.2.2 Troubleshooting by Alarm Code

Detailed steps to troubleshoot issues identified by alarm codes.

1.2.3 Troubleshooting in Check Mode by Remote Control Switch

Using check mode on remote control to diagnose issues.

1.2.4 Troubleshooting by 7-Segment Display

Diagnosing issues using the outdoor unit's 7-segment display.

1.2.5 Function of RSW, DSWs and LEDs

Understanding the functions of rotary switches, dip switches, and LEDs on PCBs.

1.3 Procedure of Checking Each Main Parts

Steps for checking individual components like PCBs and remote controls.

1.3.1 Self-Checking of PCBs using Remote Control Switch

Procedure for self-diagnosing PCBs using the remote control switch.

1.3.2 Self-Checking of Remote Control Switch

Steps to perform self-checking on the remote control switch.

1.3.3 Self-Checking of Indoor Unit PCB

Procedure for self-checking indoor unit PCBs.

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

Steps for self-checking the 7-Day Timer unit.

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

Procedure for self-checking the Central Station.

1.3.6 Procedure of Checking Other Main Parts

Steps for checking other critical main parts of the system.

1.4 Test Run

Procedures for performing test runs using remote control or outdoor unit.

1.4.1 Test Run Mode by Remote Control Switch

Steps to set and perform test run mode using the remote control switch.

1.4.2 Test Run Mode by Outdoor Unit

Procedures for performing test run mode using the outdoor unit's dip switches.

1.4.3 Checking List (FSG and FS3 Series)

Checklist for test operations specific to FSG and FS3 series.

MAIN PARTS

3. MAIN PARTS

Detailed information on the main components of the system.

3.1 Inverter

Specifications and arrangement details for the inverter unit.

3.1.1 Specifications of Inverter (For 380/415V, 50Hz and 380V, 60Hz Power Source)

Technical specifications for inverters operating on 380/415V and 380V power.

3.1.2 Specifications of Inverter (For 220V, 60Hz Power Source)

Technical specifications for inverters operating on 220V power.

3.1.3 Arrangement of Inverter Power Unit

Diagram showing the layout of inverter power unit components.

3.1.4 Inverter Time Chart

Time charts illustrating inverter operation sequences.

3.1.5 Protective Function

Details on the various protective functions of the inverter.

3.1.6 Overload Control

Explanation of the overload control mechanism for the inverter.

3.2 AC Chopper

Information on the AC Chopper control concept and features.

3.3 Auto-Louver Mechanism

Details on the auto-louver mechanism for different indoor unit types.

3.3.1 4-Way Cassette Type

Auto-louver operation and stoppage for 4-Way Cassette units.

3.3.2 2-Way Cassette Type

Auto-louver operation and stoppage for 2-Way Cassette units.

3.3.3 Ceiling Type

Auto-louver operation and stoppage for Ceiling Type units.

3.4 Scroll Compressor

Details on the reliable mechanism and principle of compression.

3.4.1 Reliable Mechanism for Low Vibration and Low Sound

Explanation of features contributing to low vibration and sound.

3.4.2 Principle of Compression

Step-by-step explanation of the compressor's working principle.

3.4.3 Structure

Diagrams illustrating the structure of the compressor.

3.5 Thermistor

Information on thermistors used in indoor and outdoor units.

3.5.1 Thermistor for Indoor Unit

Details on thermistor positions and characteristics for indoor units.

3.6 Electronic Expansion Valve

Information on electronic expansion valves for outdoor and indoor units.

3.6.1 Electronic Expansion Valve for Outdoor Units

Specifications, wiring, and activation mode for outdoor EEVs.

3.6.2 Electronic Expansion Valve for Indoor Units

Specifications, wiring, and activation mode for indoor EEVs.

3.7 Pressure Sensor

Details on high and low pressure sensors and their characteristics.

3.8 High Pressure Protection Device

Explanation of the high pressure protection device and its control.

3.9 Noise Filter (NF)

Specifications and circuit diagram for the noise filter.

3.10 Capacitor (CB1, CB2)

Specifications for the capacitor components.

3.11 Reactor (DCL)

Specifications for the reactor (DCL) component.

OPTIONAL FUNCTION

4. OPTIONAL FUNCTION

Details on various optional functions available for the system.

4.1 Indoor Unit

Optional functions for various indoor unit models.

4.1.1 Remote Control ON/OFF Function

Provides control to stop and start the system automatically from a remote place.

4.1.2 Power Supply ON/OFF 1 (Automatic Operation When Power Supply ON)

Automatic system start/stop based on power supply ON/OFF.

4.1.4 Control by Field-Supplied Room Thermostat

Using a field-supplied room thermostat for indoor unit control.

4.1.5 Operation Control by Remote Temperature Sensor (Except for RPK-FSGM Series)

Controlling the unit using an optional remote temperature sensor.

4.1.7 Picking Up Operation Signal

Utilizing signals to pick up operation status or interlock with fresh air fan.

4.2 Indoor Unit (For RPI (0.8 to 5.0HP), RCI, RCD, RPC (After Alteration) and KPI Series)

Input/output settings and functions for specific indoor unit series.

4.2.1 Input and Output Setting of Indoor PCB Connector

Procedures for changing settings of input/output ports on the indoor unit PCB.

4.2.2 Remote Control Thermistor Function

Using remote control thermistor for temperature control instead of indoor unit thermistor.

4.2.3 Remote Control ON/OFF Function

Provides control to stop and start the system from a remote place.

4.2.4 Power Supply ON/OFF 1 (Automatic Operation When Power Supply ON)

Automatic system start/stop based on power supply ON/OFF.

4.2.6 Control by Field-Supplied Room Thermostat (Except for KPI Series)

Using a field-supplied room thermostat for control.

4.2.7 Operation Control by Remote Temperature Sensor (Except for KPI Series)

Controlling the unit using an optional remote temperature sensor.

4.2.9 Precooling/Preheating Operation (KPI Series Only)

Delayed start of total heat exchanger at interlock with air conditioner.

4.2.10 Picking Up Operation Signal

Utilizing signals to pick up operation status or interlock with fresh air fan.

4.3 Outdoor Unit

Optional functions for the outdoor unit.

4.3.1 Demand

Control of compressor stoppage based on demand input.

4.3.2 Forced Stoppage

Procedure for forced stoppage of compressor and fan motor.

4.3.3 Demand Current Control (Only for 24 and 30HP)

Control of compressor frequency based on demand current limits.

4.3.4 Fixing Operation Mode

Fixing the operation mode to cooling or heating.

4.3.5 Snow Sensor

Function of the snow sensor for outdoor unit protection.

4.3.6 Defrosting Condition Changeover

Changing defrosting operation conditions via dip switch.

4.3.7 Indoor Fan Control during Thermo-OFF at Heating

Controlling indoor fan operation during heating thermo-OFF.

4.3.8 All Season Heating Operation

Enabling year-round heating operation.

4.3.9 All Season Cooling Operation

Enabling year-round cooling operation.

4.3.10 Night Shift (Low Sound) Operation

Setting the night shift (low sound) operation mode.

4.3.11 Picking Up Signals from Outdoor Unit Printed Circuit Board

Picking up alarm and operation signals from the outdoor unit PCB.

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

Details on the PC-P1H and PC-2H2 remote control switches.

4.4.1 Name of Part

Identification of parts on the remote control switch.

4.4.2 Simultaneous Operation

Methods for simultaneous operation of multiple indoor units.

4.4.3 Operation System with Two Remote Control Switches

Setting up an operation system with two remote control switches.

4.4.4 Optional Function Setting

Procedures for setting optional functions via dip switches.

4.4.5 Optional Functions of Remote Control Switch

Detailed explanation of various optional functions configurable via remote control.

4.4.6 Indication of Address (ADDS) and Refrigerant Cycle Number (RN)

Display of indoor unit address and refrigerant cycle number on the remote.

4.5 Wireless Remote Control Switch, PC-LH3

Details on the PC-LH3 wireless remote control switch.

4.5.1 Name of Part

Identification of parts on the wireless remote control switch.

4.5.2 Identifying of Indoor Units Installed Side By Side

Procedure to identify indoor units installed side-by-side.

4.5.3 Simultaneous Operation

Performing simultaneous operation of multiple indoor units.

4.5.4 Emergency Operation

Steps for operating the unit in emergency mode.

4.5.5 Optional Function Setting (In Case of PC-RLH4, PC-RLH5 and PC-RLH7)

Setting optional functions via dip switches on receiver kit.

4.5.6 Optional Functions of Wireless Remote Control Switch

Details on optional functions configurable via wireless remote control.

4.6 7-Day Timer, PSC-5T

Operation and self-checking procedures for the 7-Day Timer.

4.7 Central Station, PSC-5S

Features and operation of the Central Station PSC-5S.

FIELD WORK INSTRUCTION

5. FIELD WORK INSTRUCTION

Comprehensive guide for field work and installation instructions.

5.1 Burnt-out Compressor due to Insufficient Refrigerant Charge

Troubleshooting guide for compressor failure due to low refrigerant charge.

5.2 Insufficient Cooling Performance When A Long Piping Is Applied

Addressing cooling issues caused by long refrigerant piping.

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

Troubleshooting high operating sound in In-the-Ceiling indoor units.

5.4 Alarm Code “31”

Guidance for diagnosing and resolving alarm code '31'.

5.5 Not Cooling Well due to Insufficient Installation Space for Outdoor Unit

Troubleshooting poor cooling due to inadequate outdoor unit installation space.

5.6 Attention for SET-FREE FXG/FX3 Series

Important considerations for SET-FREE FXG/FX3 series system design and installation.

5.7 Select Guide of Drain Pipe for Indoor Unit

Guidance on selecting the correct drain pipe for indoor units.

5.8 Caution on Refrigerant Leakage

Safety precautions and guidelines regarding refrigerant leakage.

5.9 Maintenance Work

General maintenance tasks for indoor and outdoor units.

5.9.1 For Indoor Unit and Outdoor Unit

Maintenance checks for fan, motor, heat exchanger, piping, cabinet, and electricals.

5.9.2 For Indoor Unit

Maintenance checks for air filter, drain system, float switch, and outdoor unit.

5.9.3 For Outdoor Unit

Maintenance checks for compressor, reverse valve, strainer, earth wire, and oil heater.

5.10 Service & Maintenance Record by 7-Segment Display

Record keeping for service and maintenance using the 7-segment display.

5.11 Service & Maintenance Record by Remote Control Switch

Record keeping for service and maintenance using the remote control switch.

5.12 Service & Maintenance Record

General service and maintenance record log.

TROUBLESHOOTING

1. TROUBLESHOOTING

Comprehensive guide for identifying and resolving operational issues.

1.1 Initial Troubleshooting

Basic steps for troubleshooting, including switch settings and initial checks.

1.1.1 Rotary Switch and Dip Switch Setting

Details on setting rotary and dip switches for indoor and outdoor units.

1.1.2 Checking of Electrical Wiring

Guidelines for checking electrical wiring connections and cable types.

1.1.3 Checking by 7-Segment Display

Simple checking method using the outdoor unit's 7-segment LED display.

1.1.4 Emergency Operation when Inverter Compressor is Damaged

Procedure for emergency operation when the inverter compressor is failed.

1.1.5 Failure of Power Supply to Indoor Unit and Remote Control Switch

Troubleshooting steps for power supply failures affecting indoor units and controls.

1.1.6 Abnormal Transmission between Remote Control Switch and Indoor Unit

Diagnosing issues with abnormal transmission between controls and indoor units.

1.1.7 Abnormalities of Devices

Troubleshooting common abnormalities of various system devices.

1.2 Troubleshooting Procedure

Systematic procedures for diagnosing issues using alarm codes and check modes.

1.2.1 Alarm Code Table

List of alarm codes and their corresponding contents of abnormality and leading causes.

1.2.2 Troubleshooting by Alarm Code

Detailed steps to troubleshoot issues identified by alarm codes.

1.2.3 Troubleshooting in Check Mode by Remote Control Switch

Using check mode on remote control to diagnose issues.

1.2.4 Troubleshooting by 7-Segment Display

Diagnosing issues using the outdoor unit's 7-segment display.

1.2.5 Function of RSW, DSWs and LEDs

Understanding the functions of rotary switches, dip switches, and LEDs on PCBs.

1.3 Procedure of Checking Each Main Parts

Steps for checking individual components like PCBs and remote controls.

1.3.1 Self-Checking of PCBs using Remote Control Switch

Procedure for self-diagnosing PCBs using the remote control switch.

1.3.2 Self-Checking of Remote Control Switch

Steps to perform self-checking on the remote control switch.

1.3.3 Self-Checking of Indoor Unit PCB

Procedure for self-checking indoor unit PCBs.

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

Steps for self-checking the 7-Day Timer unit.

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

Procedure for self-checking the Central Station.

1.3.6 Procedure of Checking Other Main Parts

Steps for checking other critical main parts of the system.

1.4 Test Run

Procedures for performing test runs using remote control or outdoor unit.

1.4.1 Test Run Mode by Remote Control Switch

Steps to set and perform test run mode using the remote control switch.

1.4.2 Test Run Mode by Outdoor Unit

Procedures for performing test run mode using the outdoor unit's dip switches.

1.4.3 Checking List (FSG and FS3 Series)

Checklist for test operations specific to FSG and FS3 series.

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