HITACHI SERVICE MANUAL
TECHNICAL INFORMATION
MODEL RAS-50FH5/RAC-50YH5
Contents
SPECIFICATIONS
HOW TO USE
CONSTRUCTION AND DIMENSIONAL DIAGRAM
MAIN PARTS COMPONENT
WIRING DIAGRAM
CIRCUIT DIAGRAM
PRINTED WIRING BOARD LOCATION DIAGRAM
BLOCK DIAGRAM
BASIC MODE
REFRIGERATING CYCLE DIAGRAM
AUTO SWING FUNCTION
DESCRIPTION OF MAIN CIRCUIT OPERATION
SERVICE CALL Q & A
TROUBLE SHOOTING
PARTS LIST AND DIAGRAM
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HITACHI SERVICE MANUAL
TECHNICAL INFORMATION
RAS-25YH5/RAC-25YH5
RAS-35YH5/RAC-35YH5
CONTENTS
SPECIFICATIONS
HOW TO USE
CONSTRUCTION AND DIMENSIONAL DIAGRAM
MAIN PARTS COMPONENT
WIRING DIAGRAM
CIRCUIT DIAGRAM
PRINTED WIRING BOARD LOCATION DIAGRAM
BLOCK DIAGRAM
BASIC MODE
REFRIGERATING CYCLE DIAGRAM
DESCRIPTION OF MAIN CIRCUIT OPERATION
SERVICE CALL Q & A
TROUBLE SHOOTING
PROCEDURE FOR DISASSEMBLY AND REASSEMBLY
PARTS LIST AND DIAGRAM
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HITACHI SERVICE MANUAL
TECHNICAL INFORMATION
RAS-25YH4/RAC-25YH4
RAS-35YH4/RAC-35YH4
CONTENTS
SPECIFICATIONS
HOW TO USE
CONSTRUCTION AND DIMENSIONAL DIAGRAM
MAIN PARTS COMPONENT
WIRING DIAGRAM
CIRCUIT DIAGRAM
PRINTED WIRING BOARD LOCATION DIAGRAM
BLOCK DIAGRAM
BASIC MODE
REFRIGERATING CYCLE DIAGRAM
DESCRIPTION OF MAIN CIRCUIT OPERATION
SERVICE CALL Q & A
TROUBLE SHOOTING
PROCEDURE FOR DISASSEMBLY AND REASSEMBLY
PARTS LIST AND DIAGRAM
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HITACHI SERVICE MANUAL
RAS-25FH5/RAC-25YH5
RAS-35FH5/RAC-35YH5
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HITACHI SERVICE MANUAL
Outdoor Unit : 2 - 6 HP
Indoor Unit Type :
4 - Way Casette
2 - Way Casette
Wall
Ceiling
In-the-Ceiling
Floor
Floor Consealed
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HITACHI SPLIT-UNIT AIR CONDITIONER INSTALLATION MANUAL
Indoor Unit Outdoor Unit
RAS-70YH5 + RAC-70YH5
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HITACHI SPLIT-UNIT AIR CONDITIONER INSTALLATION MANUAL
Indoor Unit Outdoor Unit
RAS-ME10HZ + RAC-ME10HZ
RAS-ME14HZ + RAC-ME14HZ
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Hawco AC Price Guide Hitachi (14)Download
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HITACHI SPLIT-UNIT AIR CONDITIONER INSTALLATION MANUAL
RAS-18YH6/RAC-18YH6
RAS-25YH6/RAC-25YH6
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HITACHI SPLIT-UNIT AIR CONDITIONER INSTALLATION MANUAL
Indoor Unit RAS-10C9K
Outdoor Unit RAC-10C9K
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Technical Catalogue
Outdoor Units: 3 ~ 42 HP
Indoor Units Type:
• 4-Way Cassette
• 2-Way Cassette
• Wall
• Ceiling
• In-the-Ceiling
• Floor
• Floor Concealed
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Hitachi DC inverter UTOPIA Download
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UTOPIA RASC-G8 SERIES
TECHNICAL CATALOG
Outdoor Units 5, 10 hp
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SERVICE MANUAL
TECHNICAL INFORMATION
RAS-07CH4/RAC-07CH4
RAS-09CH4/RAC-09CH4
CONTENTS
SPECIFICATIONS
HOW TO USE
CONSTRUCTION AND DIMENSIONAL DIAGRAM
MAIN PARTS COMPONENTS
WIRING DIAGRAM
BASIC MODE
REFRIGERATING CYCLE
AUTO SWING FUNCTION
SERVICE CALL Q & A
PARTS LIST AND DIAGRAM
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here
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HITACHI INVERTER-DRIVEN
MULTI-SPLIT SYSTEM
HEAT PUMP AIR CONDITIONERS
SET FREE FSG(1)/FS3, FS5 SERIES
AND SET FREE FXG/FX3 SERIES
SERVICE MANUAL
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-1.0FSGM RPK-2.0FSGM
RPK-1.5FSGM RPK-2.3FSGM
• 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
Contents
1. TROUBLESHOOTING
1.1 Initial Troubleshooting
1.1.1 Rotary Switch and Dip Switch Setting
1.1.2 Checking of Electrical Wiring
1.1.3 Checking by 7-Segment Display
1.1.4 Emergency Operation when Inverter Compressor is Damaged
1.1.5 Failure of Power Supply to Indoor Unit and Remote Control Switch
1.1.6 Abnormal Transmission between Remote Control Switch and Indoor Unit
1.1.7 Abnormalities of Devices
1.2 Troubleshooting Procedure
1.2.1 Alarm Code Table
1.2.2 Troubleshooting by Alarm Code
1.2.3 Troubleshooting in Check Mode by Remote Control Switch
1.2.4 Troubleshooting by 7-Segment Display
1.2.5 Function of RSW, DSWs and LEDs
1.3 Procedure of Checking Each Main Parts
1.3.1 Self-Checking of PCBs using Remote Control Switch
1.3.2 Self-Checking of Remote Control Switch
1.3.3 Self-Checking of Indoor Unit PCB
(Except for: RCI, RCD, RPI (0.8 to 5.0HP), RPC (After Alteration) and KPI) 107
1.3.4 Self-Checking of 7-Day Timer (PSC-3T)
1.3.5 Self-Checking of Central Station (PSC-3S1)
1.3.6 Procedure of Checking Other Main Parts
1.4 Test Run 125
1.4.1 Test Run Mode by Remote Control Switch
1.4.2 Test Run Mode by Outdoor Unit
1.4.3 Checking List (FSG and FS3 Series)
2. SERVICING
2.1 Outdoor Unit
2.1.1 Removing Air Intake Grille
2.1.2 Removing Front Service Panel
2.1.3 Removing Fan Guard Nets
2.1.4 Removing Outdoor Fan
2.1.5 Removing Compressor (RAS-5FSG and RAS-5FS3)
2.1.6 Removing Compressors
(RAS-8FSG, RAS-10FSG, RAS-16FSG, RAS-20FSG, RAS-8FS3, RAS-10FS3, RAS-16FS3,
RAS-20FS3, RAS-8FXG, RAS-10FXG, RAS-8FX3 and RAS-10FX3)
2.1.7 Removing Compressors for MC1 and MC2
(RAS-24FSG1, RAS-30FSG1, RAS-24FS5 and RAS-30FS5)
2.1.8 Removing Compressors for MC3 and MC4
(RAS-24FSG1, RAS-30FSG1, RAS-24FS5 and RAS-30FS5)
2.1.9 Removing High Pressure Switch, High Pressure Sensor and Low Pressure Sensor
2.1.10 Removing Coil for Reversing Valve Coil
2.1.11 Removing Coil for Solenoid Valve Coil
2.1.12 Removing Thermistor for Liquid Pipe
2.1.13 Removing Reversing Valve (RAS-5FSG, RAS-8FSG, RAS-10FSG, RAS-16FSG, RAS-20FSG, RAS-5FS3, RAS-8FS3, RAS-10FS3, RAS-16FS3, RAS-20FS3, RAS-8FXG, RAS-10FXG,
RAS-8FX3 and RAS-10FX3)
2.1.14 Removing Reversing Valve (RAS-24FSG1, RAS-30FSG1, RAS-24FS5 and RAS-30FS5)
2.1.15 Removing Electrical Components (RAS-5FSG, RAS-8FSG, RAS-10FSG, RAS-16FSG, RAS-20FSG, RAS-5FS3, RAS-8FS3, RAS-10FS3, RAS-16FS3, RAS-20FS3, RAS-8FXG,
RAS-10FXG, RAS-8FX3 and RAS-10FX3)
2.1.16 Removing Electrical Components
(RAS-24FSG1, RAS-30FSG1, RAS-24FS5 and RAS-30FS5)
2.2 In-the-Ceiling Type (RPI-0.8FSG1 to RPI-5.0FSG1)
2.2.1 Removing Long Life Filter
2.2.2 Removing Printed Circuit Board (PCB)
2.2.3 Removing Indoor Fan and Fan Motor
2.2.4 Removing Thermistor for Liquid Piping and Gas Piping
2.2.5 Removing Electronic Expansion Valve Coil
2.2.6 Removing Float Switch
2.2.7 Removing Drain Pump
2.2.8 Removing Drain Pan
2.3 In-the-Ceiling Type (RPI-8FSG1 and RPI-10FSG1)
2.3.1 Removing Long Life Filter
2.3.2 Removing Printed Circuit Board (PCB)
2.3.3 Removing Indoor Fan and Fan Motor
2.3.4 Removing Electronic Expansion Valve and Thermistors
2.4 4-Way Cassette Type
2.4.1 Removing Long Life Filter
2.4.2 Removing Air Intake Grille
2.4.3 Removing Electrical Box Cover
2.4.4 Removing Optional Air Panel
2.4.5 Removing Fan Runner and Fan Motor
2.4.6 Removing Bell-Mouth
2.4.7 Removing Printed Circuit Board (PCB)
2.4.8 Removing Drain Pan
2.4.9 Removing Drain-Up Mechanism
2.4.10 Removing Float Switch
2.4.11 Removing Thermistors for Liquid Pipe and Gas Pipe
2.4.12 Removing Electronic Expansion Valve Coil
2.4.13 Removing Automatic Louver Motor
2.5 2-Way Cassette Type
2.5.1 Removing Long Life Filter and Air Intake Grille
2.5.2 Removing Electrical Box Cover
2.5.3 Removing Optional Air Panel
2.5.4 Removing Fan Runner and Fan Motor
2.5.5 Removing Printed Circuit Board (PCB)
2.5.6 Removing Float Switch
2.5.7 Removing Drain-Up Mechanism
2.5.8 Removing Drain Pan
2.5.9 Removing Thermistors for Liquid and Gas Pipes
2.5.10 Removing Electronic Expansion Valve Coil
2.5.11 Removing Automatic Louver Motor
2.6 Wall Type
2.6.1 Removing Air Filter
2.6.2 Removing Front Panel
2.6.3 Removing Motor for Automatic Louver
2.6.4 Removing Thermistors for Liquid Pipe, Gas Pipe, Discharge Air and Suction Air
2.6.5 Removing Electrical Box Cover
2.6.6 Removing Indoor PCB
2.6.7 Removing Drain Pan
2.6.8 Removing Heat Exchanger
2.6.9 Removing Fan and Fan Motor
2.6.10 Removing Electronic Expansion Valve Coil
2.7 Floor Type
2.7.1 Removing Air Intake Grille
2.7.2 Removing Air Filter
2.7.3 Removing Discharge Air Grille
2.7.4 Removing Front Cover
2.7.5 Removing Fan Motor
2.7.6 Removing Printed Circuit Board (PCB)
2.7.7 Removing Thermistors for Liquid Pipe and Gas Pipe
2.8 Floor Concealed Type
2.8.1 Removing Air Filter
2.8.2 Removing Front Covers
2.8.3 Removing Fan Motor
2.8.4 Removing Printed Circuit Board (PCB)
2.8.5 Removing Thermistors for Liquid Pipe and Gas Pipe
2.9 Ceiling Type
2.9.1 Removing Air Filter and Air Intake Grille
2.9.2 Removing Side Cover
2.9.3 Removing Discharge Air Grille
2.9.4 Removing Fan Motor
2.9.5 Removing Bearing
2.9.6 Removing Coupling
2.9.7 Removing Automatic Louver Motor
2.9.8 Removing Thermistors for Liquid Pipe and Gas Pipe, and Electronic Expansion Valve Coil
2.9.9 Checking Procedures for Electronic Expansion Valve Coil
2.9.10 Removing Printed Circuit Board (PCB)
2.10 Total Heat Exchanger
2.10.1 Structure
2.10.2 Removing Electrical Parts
2.10.3 Removing Air Filter and Total Heat Exchanger Element
2.10.4 Removing Fan Motor
2.10.5 Air Filter Cleaning
2.10.6 Total Heat Exchanger Cleaning
2.11 Cleaning Indoor Unit Heat Exchanger
2.11.1 Required Tools for Cleaning (for All Indoor Units)
2.11.2 In-the-Ceiling Type
2.11.3 Cleaning 4-Way Cassette Type Indoor Unit
2.11.4 Cleaning 2-Way Cassette Type Indoor Unit
2.11.5 Cleaning Wall Type Indoor Unit
2.11.6 Cleaning Floor Type and Floor Concealed Type Indoor Unit
2.11.7 Cleaning Ceiling Type Indoor Unit
2.12 Collecting Refrigerant for Replacing Indoor Unit
3. MAIN PARTS
3.1 Inverter
3.1.1 Specifications of Inverter (For 380/415V, 50Hz and 380V, 60Hz Power Source)
3.1.2 Specifications of Inverter (For 220V, 60Hz Power Source)
3.1.3 Arrangement of Inverter Power Unit
3.1.4 Inverter Time Chart
3.1.5 Protective Function
3.1.6 Overload Control
3.2 AC Chopper
3.3 Auto-Louver Mechanism
3.3.1 4-Way Cassette Type
3.3.2 2-Way Cassette Type
3.3.3 Ceiling Type
3.4 Scroll Compressor
3.4.1 Reliable Mechanism for Low Vibration and Low Sound
3.4.2 Principle of Compression
3.4.3 Structure
3.5 Thermistor
3.5.1 Thermistor for Indoor Unit
3.5.2 Thermistor for Outdoor Unit
3.6 Electronic Expansion Valve
3.6.1 Electronic Expansion Valve for Outdoor Units
3.6.2 Electronic Expansion Valve for Indoor Units
3.7 Pressure Sensor
3.8 High Pressure Protection Device
3.9 Noise Filter (NF)
3.10 Capacitor (CB1, CB2)
3.11 Reactor (DCL)
4. OPTIONAL FUNCTION
4.1 Indoor Unit
(For RPF(I)-FSG(E), RPK-FSGM( ), RPC-FSG1 (Before Alteration) and RPI (8, 10HP) Series)
4.1.1 Remote Control ON/OFF Function
4.1.2 Power Supply ON/OFF 1 (Automatic Operation When Power Supply ON)
4.1.3 Power Supply ON/OFF 2 (Restarting Function After Power Failure)
4.1.4 Control by Field-Supplied Room Thermostat
4.1.5 Operation Control by Remote Temperature Sensor (Except for RPK-FSGM Series)
4.1.6 Cooling or Heating Operation Mode Setting Change by External Input (Level Signal Input)
4.1.7 Picking Up Operation Signal
4.2 Indoor Unit (For RPI (0.8 to 5.0HP), RCI, RCD, RPC (After Alteration) and KPI Series)
4.2.1 Input and Output Setting of Indoor PCB Connector
4.2.2 Remote Control Thermistor Function
4.2.3 Remote Control ON/OFF Function
4.2.4 Power Supply ON/OFF 1 (Automatic Operation When Power Supply ON)
4.2.5 Power Supply ON/OFF 2 (Restarting Function After Power Failure)
4.2.6 Control by Field-Supplied Room Thermostat (Except for KPI Series)
4.2.7 Operation Control by Remote Temperature Sensor (Except for KPI Series)
4.2.8 Cooling or Heating Operation Mode Setting Change by External Input (Except for KPI Series)
4.2.9 Precooling/Preheating Operation (KPI Series Only)
4.2.10 Picking Up Operation Signal
4.3 Outdoor Unit
4.3.1 Demand
4.3.2 Forced Stoppage
4.3.3 Demand Current Control (Only for 24 and 30HP)
4.3.4 Fixing Operation Mode
4.3.5 Snow Sensor
4.3.6 Defrosting Condition Changeover
4.3.7 Indoor Fan Control during Thermo-OFF at Heating
4.3.8 All Season Heating Operation
4.3.9 All Season Cooling Operation
4.3.10 Night Shift (Low Sound) Operation
4.3.11 Picking Up Signals from Outdoor Unit Printed Circuit Board
4.4 Remote Control Switch, PC-P1H and PC-2H2
4.4.1 Name of Part
4.4.2 Simultaneous Operation
4.4.3 Operation System with Two Remote Control Switches
4.4.4 Optional Function Setting
4.4.5 Optional Functions of Remote Control Switch
4.4.6 Indication of Address (ADDS) and Refrigerant Cycle Number (RN)
4.5 Wireless Remote Control Switch, PC-LH3
4.5.1 Name of Part
4.5.2 Identifying of Indoor Units Installed Side By Side
4.5.3 Simultaneous Operation
4.5.4 Emergency Operation
4.5.5 Optional Function Setting (In Case of PC-RLH4, PC-RLH5 and PC-RLH7)
4.5.6 Optional Functions of Wireless Remote Control Switch
4.6 7-Day Timer, PSC-5T
4.7 Central Station, PSC-5S
5. FIELD WORK INSTRUCTION
5.1 Burnt-out Compressor due to Insufficient Refrigerant Charge
5.2 Insufficient Cooling Performance When A Long Piping Is Applied
5.3 Abnormally High Operating Sound [In-the-Ceiling Type Indoor Unit]
5.4 Alarm Code “31”
5.5 Not Cooling Well due to Insufficient Installation Space for Outdoor Unit
5.6 Attention for SET-FREE FXG/FX3 Series
5.7 Select Guide of Drain Pipe for Indoor Unit
5.8 Caution on Refrigerant Leakage
5.9 Maintenance Work
5.10 Service & Maintenance Record by 7-Segment Display
5.11 Service & Maintenance Record by Remote Control Switch
5.12 Service & Maintenance Record
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SERVICE MANUAL
TECHNICAL INFORMATION
RAS-07GH4/RAC-07GH4
RAS-09GH4/RAC-09GH4
RAS-14GH4/RAC-14GH4
CONTENTS
SPECIFICATIONS
HOW TO USE
CONSTRUCTION AND DIMENSIONAL DIAGRAM
MAIN PARTS COMPONENTS
WIRING DIAGRAM
BASIC MODE
REFRIGERATING CYCLE
AUTO SWING FUNCTION
SERVICE CALL Q & A
PARTS LIST AND DIAGRAM
Download
here
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SET FREE SERIES FSXN
INDEX
1 GENERAL INFORMATION
2 REMOTE CONTROL OPERATION
3 AUTOMATIC CONTROLS
4 PART NAMES
5 REFRIGERANT CYCLE
6 TRANSPORT, LIFTING AND HANDLING OF
THE UNITS
7 UNIT INSTALLATION
8 PIPING WORK AND REFRIGERANT CHARGE.
9 ELECTRICAL WIRING
10 TEST RUN
11 ALARM CODES
12 CONTROL AND SAFETY DEVICES
13 BASIC TROUBLESHOOTING
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HITACHI SERVICE MANUAL MODEL RAS-60YH5/RAC-60YH5
CONTENTS
SPECIFICATIONS
HOW TO USE
CONSTRUCTION AND DIMENSIONAL DIAGRAM
MAIN PARTS COMPONENT
WIRING DIAGRAM
CIRCUIT DIAGRAM
PRINTED WIRING BOARD LOCATION DIAGRAM
BLOCK DIAGRAM
BASIC MODE
REFRIGERATING CYCLE DIAGRAM
AUTO SWING FUNCTION
DESCRIPTION OF MAIN CIRCUIT OPERATION
SERVICE CALL Q & A
TROUBLE SHOOTING
PARTS LIST AND DIAGRAM
Download
Here
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