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Hitachi 8E042340 Manuals
Manuals and User Guides for Hitachi 8E042340. We have
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Hitachi 8E042340 manual available for free PDF download: Service Manual
Hitachi 8E042340 Service Manual (137 pages)
CONDENSERLESS WATER CHILLERS
Brand:
Hitachi
| Category:
Chiller
| Size: 15.52 MB
Table of Contents
Table of Contents
5
General Information
9
General Notes
9
Safety and Applied Symbols
10
Product Guide
11
Classification of Water Chiller Models
11
Product Guide: Water Chillers
11
Control Functions
12
Control Functions on the Module
13
Water Control
16
Water Temperature Control
17
Compressor Control
20
Control for Recovery from Power Interruption (Option)
22
Prevention of Simultaneous Startup
23
Reverse Prevention Control
23
Anti-Freezing Control for Winter
24
Control for Prevention of Wrong Operation and Wrong Settings
27
Demand Control
27
Forced Load up Capacity Control from External Signal
30
2-Temperature Setting Function
31
External Thermo Operation from External Contact
32
Water Temperature of the Control Target
34
Operation from DC24V Contact Input
35
Thermo off Function Selection
40
Selection of Enabling/Disabling of Alarm Release by Means of Remote Stop
41
Limitation Setting for Pump Feedback Waiting Time
42
Inlet Water Temperature Thermo off Function
43
Control of the Cooling Cycle
45
Compressor Control
45
Expansion Valve Control
46
Overcurrent Protection Control
48
Control of Master/Slave Group
49
Summary of Control of Master/Slave Group
49
Setting Method
49
Operation Method
50
Other Functions of the Control of Master/Slave Group
52
Setting Items
54
Method for Setting and Confirmation of Operation Conditions through the LCD Screen
55
Run Operation
57
Setting of Switches on the Setting PCB
57
Operation Control of the Module
58
Time Chart
59
LCD Display for Service Menu
62
General Notes
70
Cycle Components
71
Compressor Removal
71
Overhaul Work
73
Recovering the Refrigerant
75
Replacement of the Cooler
75
Replacement of Expansion Valve
77
Filter Drier
78
Replacement of the Check Valve
79
Replacement of the Stop Valve (with Check Joint)
80
Replacement of the High Pressure Switch (PSH)
80
Replacement of the Pressure Sensor (Pd)
80
Replacement of the Pressure Sensor (Ps)
80
Replacement of the Pressure Relief Valve
81
Replacement of the Sight Glass
81
Replacement of the Stop Valve (X3)
81
Repalacement of the Thermistor (Suction, Thms)
82
Replacement of the Thermistor (Discharge, Thmd)
82
Replacement of the Crankcase Heater (CH)
82
Replacement of the Thermistor (Evaporation, Thme)
83
Replacement of the Thermistor (Cooler Water Inlet, Thmwi)
83
Thermistor (Cooler Water Outlet, Thmwo2)
84
Thermistor (Cooler Water Outlet, Thmwo)
84
Replacement of the Solenoid Valves (Sva, Svb, Svc)
84
Electrical Components
85
The E-Box
85
Removal of the LCD Screen
85
Replacement of Lamps and Push Buttons
86
Access to Electrical Components
86
Removal of the Pcb's
88
Transformer (TF1)
90
Transformers (TF2, TF3, TF4)
90
Overcurrent Relay (ORC)
90
Contactors (CMC, CMCD, CMCS)
91
Fuses (EF1, EF2, EF3. EFR, EFS, EFT)
91
Fuses (PFC)
92
Relays
93
Main Switch
94
Inspection of Power Source and Connections
97
Inspection of PCB
98
Confirmation of Operating Value of Protection Devices and Automatic Operation Devices
98
Protection Control Function
99
Caution Indication
100
Summary of Fault Diagnosis
101
Method for Fault Diagnosis
103
Troubleshooting by Alarm Code
104
Analysis and Countermeasure of Abnormalities
128
Thermistor Characteristics
132
Thermistor Temperature Characteristics (All Temperature Except Discharge Gas)
132
Thermistor Temperature Characteristics for Discharge Gas Temperature
132
Pressure Sensor Characteristics
133
High-Pressure Sensor
133
Low-Pressure Sensor
133
Procedures for Trouble
133
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