Hitachi TAW-270RHC Manuals

Manuals and User Guides for Hitachi TAW-270RHC. We have 2 Hitachi TAW-270RHC manuals available for free PDF download: Service Manual, Installation And Operation Manual

Hitachi TAW-270RHC Service Manual (94 pages)

Brand: Hitachi | Category: Heater | Size: 5.85 MB

Table of Contents
5
General Information
9
General Information
10
General Notes
10
Introduction
10
Applied Symbols
11
Norms and Regulations
11
Product Guide
12
Classification of the Units
12
Outdoor Unit
12
Indoor Unit
12
Product Guide
13
Outdoor Unit
13
Indoor Unit
13
Accessory Code List
14
Preparation
15
Name of each Part
16
Tank Unit TAW-(190-270)RHC
16
Outdoor Unit RAW-35RHC
16
Name and Function of Control Panel
17
Preparing for Operation
19
Filling up the Tank
19
Turning on the Power
19
Setting the Language
20
Setting the Current Time
20
Setting Hot Water Temperature
21
Control Functions
23
System Diagram
24
Basic Operation
25
Operating Procedures
25
Stopping
25
Standard Operation Without Electrical Heater
26
DHW Heater Function
27
High Demand Mode
27
Standard Mode
28
Anti Legionella Function
29
Boost Function
30
Emergency Function
31
Night Shift Function
32
Circuit Pump - DHW Recirculation Function
33
Timers Function
34
Setting of Simple Timer
34
Setting of Schedule Timer
34
Central Operation Functions
35
Smart Function
36
SG Ready Function
37
Energy Configuration Function
38
Pump down Procedure Function
39
Quick Action Function
40
Inputs and Outputs
40
Inputs
40
Outputs
40
Operation Information
41
Controller Settings
41
About
42
Electrical Checks of Main Parts
43
Outdoor Unit
44
Power Circuit
44
Power Circuit (Low Voltage)
46
PCB for Power Circuit
47
Reversing Valve Control Circuit
47
Temperature Detection Circuit
48
Electric Expansion Valve Circuit
49
DC Fan Motor Control Circuit
50
Fan Motor
51
Reactor
51
Compressor Motor
52
Thermistor for Outside Air Temperature (Ta)
53
Thermistor for Overheat Temperature (Td)
54
Thermistor for Defrost (HEX) Temperature (Te)
55
Indoor Unit
56
Safety Thermostat (Water Temperature Safety Device)
56
Electrical Heater
57
DHW Thermistor
57
Servicing
59
Outdoor Unit
60
Procedure for Disassembly and Reassembly the Outdoor Unit
60
Indoor Unit
61
Removing the Service Cover
61
Replacement of the LCD Controller
61
Replacement the PCB
62
Replacement of the Electrical Heater
62
Replacement of the Thermistor
63
Replacement of the Safety Thermostat
63
Replacing the Mg Anode Rod
64
Troubleshooting
65
Outdoor Unit
66
Discharge Procedure and Power Shut off Method for Power Circuit
66
Troubleshooting Support
68
Self-Diagnosis Lighting Mode
69
Checking the Electrical Parts of the Outdoor Unit
72
Checking the Refrigerant Cycle
75
How to Run the Indoor Unit with the Outdoor Unit Test Switch
76
Service Call Q&A
77
Indoor Unit
78
Operation
79
Troubleshooting by Alarm Code (Related to Tank)
80
Troubleshooting by Protection Code (Outdoor Unit)
82
Maintenance Notes
89
Maintenance Work
90
Outdoor Unit
90
Indoor Unit
91

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