Table Of Contents - Hitachi RAF-50FX8 Service Manual

Table of Contents

Specifications1
Table Of Contents1
Service Manual1
Technical Information1
Room Air Conditioner1
Safety During Repair Work2
Working Standards For Preventing Breakage Of Semiconductors4
Object Parts4
Items To Be Observed In Handling4
Conductive Container4
Grounding Of The Working Table6
Grounding A Solder Iron6
Caution8
How To Use11
Safety Precaution11
Precautions During Installation11
Precautions During Operation11
Names And Functions Of Each Part12
Indoor Unit12
Outdoor Unit12
Temporary Switch12
Various Functions13
Automatic Operation13
Remote Controller13
Precautions For Use13
Heating Operation14
Dehumidifying Operation14
Cooling Operation15
Fan Operation15
Extended Airflow15
How To Set The Timer16
How To Cancel Reservation16
How To Set The Sleep Timer17
Adjusting The Air Deflectors17
How To Change The Batteries In The Remote Controller18
Circuit Breaker18
How To Use The Air Conditioner Effectively18
Maintenance18
How To Install And Remove The Front Panel19
Cleaning Of Front Panel19
Maintenance At Beginning Of Long Off Period19
Air Cleaning Filters19
Information20
Caraburetors20
Timer Programming/Sleep Timer Operation20
Construction And Dimensional Diagram33
Dimensions Des Unités34
Main Parts Component37
Thermostat Specifications37
Fan Motor37
Fan Motor Specifications37
Principaux Composants37
Compressor38
Compressor Motor Specifications38
Wiring Diagram39
Schémas Électriques40
Wiring Diagram Of The Printed Wiring Board41
Schéma Électrique Du Circuit Imprimé41
Block Diagram46
Organigramme De Controle47
Basic Mode48
Mode De Base49
Mode Data File50
Fan Speed By Mode50
Room Temperature Shift Value50
Basic Cooling Operation52
Condensation Condition Criterion Value52
Cooling Sleep Operation54
Cooling Defrost54
Dehumidifying56
Dehumidifying Sleep Operation56
Heating Basic Operation58
Reversing Valve Defrosting60
Setting Defrosting Inhibit Period60
Heating Sleep Operation60
Refrigerating Cycle Diagram62
Cooling Cycle62
Heating Cycle62
Schéma Du Cycle De Réfrigération63
Disassembly & Assembly Procedure64
Air Filter64
Procedure D'assemblage Et Desassemblage65
Remove The Front Cover66
Install The Front Cover66
Front Cover Fixing Claws (4 Places)66
Front Cover66
Indicating P.w.b.68
Electrical Parts Case68
Discharge Frame70
Discharge Frame Auto Sweep Motor70
Fan Motor And Tangential Air Flow Fan72
Description Of Main Circuit Operation74
Power Circuit74
Reset Circuit76
Room Temperature Thermistor Circuit78
Heat Exchanger Thermistor Circuit78
Humidity Sensor Circuit78
Fan Motor Drive Circuit80
Buzzer Circuit82
Receive Circuit82
Initial Setting Circuit (Ic401)84
Temporary Switch Circuit84
Smoothing Capacitor (C501, C502, C503)88
Smoothing Capacitor (C510, C511)88
C506 To C508, C512, C513, Nf Coil88
Surge Absorber, Varistor 1, 2, 388
Indoor/Outdoor Interface Circuit90
Voltages Waveforms Of Indoor / Outdoor Microcomputers94
Power Module Circuit100
Switching Order Of Power Module102
Voltage Waveform At Each Point102
Power Module Circuit (U + Is On, V - Is On)104
Power Circuit For P.w.b.106
Shifting From Off To On106
During On108
Shifting From On To Off108
During Off108
Reversing Valve Control Circuit110
Drive Circuit112
Hic And Peripheral Circuits114
Microcomputer (Ax-8T11) And Peripheral Circuits114
) Peak Current Cut Off Circuit116
Overload Control Circuit (Ovl Control Circuit)118
Overload Control System Configuration118
Overload External Judgement Circuit118
Voltage Amp. Circuit120
During Overload Control120
During Start Current Control122
Rotation Speed122
Temperature Detection Circuit124
Outdoor Dc Fan Motor Control Circuit128
Power Factor Control Circuit132
Increasing Dc Voltage (Vd)134
Cooling Mode136
Dehumidifying Mode136
Heating Mode136
Service Call Q&A136
Mode Refroidissement137
Mode Chauffage137
Auto Operation138
Fonctionnement Automatique139
Trouble Shooting144
Precautions For Checking144
Detection Des Pannes145
Cautions For Icp (Ic Protector)148
Trouble Shooting When The Timer Lamp Blinks150
Lighting Mode Of The Self-Diagnosis Lamp152
Checking The Refrigerating Cycle154
Checking The Indoor Unit Electrical Parts158
Power Does Not Come On (No Operation)158
Outdoor Unit Does Not Operate (But Receives Remote Infrared Signal)160
Indoor Fan Speed Does Not Change (Others Are Normal)162
Air Deflector Does Not Move (Others Are Normal)162
Checking The Main P.w.b (Power Circuit)164
Self Diagnosis Indicating Function (Indoor Unit)166
How To Count The Number Of Blinking Of The Lamp166
Self Diagnosis Memory Function168
Re-Indication Method For Defective Mode168
Clear Method For Data Of Defective Mode168
Checking The Outdoor Unit Electrical Parts170
Rotation Speed Does Not Increase180
How To Check Power Module180
Checking Power Module Using Tester180
How To Operate Using The Service Switch The Outdoor Unit182
How To Operate The Outdoor Unit Independently182
Parts List And Diagram184
Liste Des Piéces De Rechange184