Hitachi RAC-50FX8 Manuals

Manuals and User Guides for Hitachi RAC-50FX8. We have 1 Hitachi RAC-50FX8 manual available for free PDF download: Service Manual

Hitachi RAC-50FX8 Service Manual

Hitachi RAC-50FX8 Service Manual (191 pages)

Brand: Hitachi | Category: Air Conditioner | Size: 8.18 MB

Table of Contents

Table of Contents
1
Specifications
1
Room Air Conditioner
1
Technical Information
1
Service Manual
1
Safety During Repair Work
2
Working Standards for Preventing Breakage of Semiconductors
4
Object Parts
4
Items to be Observed in Handling
4
Conductive Container
4
Grounding of the Working Table
6
Grounding a Solder Iron
6
Caution
8
Specifications
10
- How to Use
  11
- Safety Precaution
  11
- Precautions During Installation
  11
- Precautions During Operation
  11
- Temporary Switch
  12
- Indoor Unit
  12
- Outdoor Unit
  12
- Names and Functions of each Part
  12
- Various Functions
  13
- Automatic Operation
  13
- Remote Controller
  13
- Precautions for Use
  13
- Heating Operation
  14
- Dehumidifying Operation
  14
- Extended Airflow
  15
- Fan Operation
  15
- Cooling Operation
  15
- How to Set the Timer
  16
- How to Cancel Reservation
  16
- How to Set the Sleep Timer
  17
- Adjusting the Air Deflectors
  17
- How to Change the Batteries in the Remote Controller
  18
- Circuit Breaker
  18
- How to Use the Air Conditioner Effectively
  18
- Maintenance
  18
- Maintenance at Beginning of Long off Period
  19
- Air Cleaning Filters
  19
- Cleaning of Front Panel
  19
- How to Install and Remove the Front Panel
  19
- Information
  20
- Caraburetors
  20
- Timer Programming/Sleep Timer Operation
  20
Construction and Dimensional Diagram
33
Dimensions des Unités
34
- Fan Motor
  37
- Fan Motor Specifications
  37
- Thermostat Specifications
  37
Main Parts Component
37
Principaux Composants
37
- Compressor
  38
- Compressor Motor Specifications
  38
Wiring Diagram
39
Schémas Électriques
40
Wiring Diagram of the Printed Wiring Board
41
Schéma Électrique du Circuit Imprimé
41
Block Diagram
46
Organigramme de Controle
47
Basic Mode
48
Mode de Base
49
- Mode Data File
  50
- Room Temperature Shift Value
  50
- Fan Speed by Mode
  50
- Basic Cooling Operation
  52
- Condensation Condition Criterion Value
  52
- Cooling Sleep Operation
  54
- Cooling Defrost
  54
- Dehumidifying
  56
- Dehumidifying Sleep Operation
  56
- Heating Basic Operation
  58
- Heating Sleep Operation
  60
- Reversing Valve Defrosting
  60
- Setting Defrosting Inhibit Period
  60
- Cooling Cycle
  62
- Heating Cycle
  62
Refrigerating Cycle Diagram
62
Schéma du Cycle de Réfrigération
63
Air Filter
64
Disassembly & Assembly Procedure
64
Procedure D'assemblage Et Desassemblage
65
- Front Cover
  66
- Install the Front Cover
  66
- Front Cover Fixing Claws (4 Places)
  66
- Remove the Front Cover
  66
- Indicating P.w.b.
  68
- Electrical Parts Case
  68
- Discharge Frame
  70
- Discharge Frame Auto Sweep Motor
  70
- Fan Motor and Tangential Air Flow Fan
  72
- Power Circuit
  74
Description of Main Circuit Operation
74
- Reset Circuit
  76
- Room Temperature Thermistor Circuit
  78
- Heat Exchanger Thermistor Circuit
  78
- Humidity Sensor Circuit
  78
- Fan Motor Drive Circuit
  80
- Buzzer Circuit
  82
- Receive Circuit
  82
- Initial Setting Circuit (IC401)
  84
- Temporary Switch Circuit
  84
- Surge Absorber, Varistor 1, 2, 3
  88
- C506 to C508, C512, C513, NF COIL
  88
- Smoothing Capacitor (C501, C502, C503)
  88
- Smoothing Capacitor (C510, C511)
  88
- Indoor/Outdoor Interface Circuit
  90
- Voltages Waveforms of Indoor / Outdoor Microcomputers
  94
- Power Module Circuit
  100
- Switching Order of Power Module
  102
- Voltage Waveform at each Point
  102
- Power Module Circuit (U + Is ON, V - Is ON)
  104
- Power Circuit for P.W.B.
  106
- Shifting from off to on
  106
- During off
  108
- During on
  108
- Shifting from on to off
  108
- Reversing Valve Control Circuit
  110
- Drive Circuit
  112
- HIC and Peripheral Circuits
  114
- Microcomputer (AX-8T11) and Peripheral Circuits
  114
- ) Peak Current Cut off Circuit
  116
- Overload Control Circuit (OVL Control Circuit)
  118
- Overload Control System Configuration
  118
- Overload External Judgement Circuit
  118
- Voltage Amp. Circuit
  120
- During Overload Control
  120
- During Start Current Control
  122
- Rotation Speed
  122
- Temperature Detection Circuit
  124
- Outdoor DC Fan Motor Control Circuit
  128
- Power Factor Control Circuit
  132
- Increasing DC Voltage (VD)
  134
- Cooling Mode
  136
- Dehumidifying Mode
  136
- Heating Mode
  136
Service Call Q&A
136
- Mode Refroidissement
  137
- Mode Chauffage
  137
- Auto Operation
  138
- Fonctionnement Automatique
  139
- Precautions for Checking
  144
Trouble Shooting
144
Detection des Pannes
145
Parts List and Diagram
184
Liste des Piéces de Rechange
184

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