Hitachi RAW-35RHC - Maintenance Notes

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7. Maintenance notes

7 Maintenance notes

SMGB0135 rev.0 - 06/2020

Index

7.1 Maintenance work .................................................................................................................................82

7.1.1 Outdoor unit ................................................................................................................................................... 82

7.1.2 Indoor unit ..................................................................................................................................................... 83

Main Page

Table of Contents5
General Information9
General Information10
General Notes10
Introduction10
Applied Symbols11
Norms and Regulations11
Product Guide12
Classification of the Units12
Outdoor Unit12
Indoor Unit12
Product Guide13
Outdoor Unit13
Indoor Unit13
Accessory Code List14
Preparation15
Name of each Part16
Tank Unit TAW-(190-270)RHC16
Outdoor Unit RAW-35RHC16
Name and Function of Control Panel17
Preparing for Operation19
Filling up the Tank19
Turning on the Power19
Setting the Language20
Setting the Current Time20
Setting Hot Water Temperature21
Control Functions23
System Diagram24
Basic Operation25
Operating Procedures25
Stopping25
Standard Operation Without Electrical Heater26
DHW Heater Function27
High Demand Mode27
Standard Mode28
Anti Legionella Function29
Boost Function30
Emergency Function31
Night Shift Function32
Circuit Pump - DHW Recirculation Function33
Timers Function34
Setting of Simple Timer34
Setting of Schedule Timer34
Central Operation Functions35
Smart Function36
SG Ready Function37
Energy Configuration Function38
Pump down Procedure Function39
Quick Action Function40
Inputs and Outputs40
Inputs40
Outputs40
Operation Information41
Controller Settings41
About42
Electrical Checks of Main Parts43
Outdoor Unit44
Power Circuit44
Power Circuit (Low Voltage)46
PCB for Power Circuit47
Reversing Valve Control Circuit47
Temperature Detection Circuit48
Electric Expansion Valve Circuit49
DC Fan Motor Control Circuit50
Fan Motor51
Reactor51
Compressor Motor52
Thermistor for Outside Air Temperature (Ta)53
Thermistor for Overheat Temperature (Td)54
Thermistor for Defrost (HEX) Temperature (Te)55
Indoor Unit56
Safety Thermostat (Water Temperature Safety Device)56
Electrical Heater57
DHW Thermistor57
Servicing59
Outdoor Unit60
Procedure for Disassembly and Reassembly the Outdoor Unit60
Indoor Unit61
Removing the Service Cover61
Replacement of the LCD Controller61
Replacement the PCB62
Replacement of the Electrical Heater62
Replacement of the Thermistor63
Replacement of the Safety Thermostat63
Replacing the Mg Anode Rod64
Troubleshooting65
Outdoor Unit66
Discharge Procedure and Power Shut off Method for Power Circuit66
Troubleshooting Support68
Self-Diagnosis Lighting Mode69
Checking the Electrical Parts of the Outdoor Unit72
Checking the Refrigerant Cycle75
How to Run the Indoor Unit with the Outdoor Unit Test Switch76
Service Call Q&A77
Indoor Unit78
Operation79
Troubleshooting by Alarm Code (Related to Tank)80
Troubleshooting by Protection Code (Outdoor Unit)82
Maintenance Notes89
Maintenance Work90
Outdoor Unit90
Indoor Unit91

Hitachi RAW-35RHC - Maintenance Notes

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