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Hitachi Manuals
Chiller
RCUE40AG1-400AG1
Service manual
Table Of Contents - Hitachi RCUE40AG1-400AG1 Service Manual
Air cooled
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Table Of Contents
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Contents
Table of Contents
Troubleshooting
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Table of Contents
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Table of Contents
Table Of Contents
3
Troubleshooting
5
Outline Of Failure Diagnosis
5
Alarm Indication
6
Failure Diagnosis Method
7
General Check Of Failure Diagnosis
7
Excessively Low Suction Pressure
8
Low Pressure Protection By Suction Gas Thermistor
9
Excess Low Temperature Of Cooler Inlet Refrigerant
10
Activation Of Freeze Protection Control
11
Activation Of High Pressure Switch (Psh 1~6)
12
Activation Of Discharge Gas Thermostat
13
Activation Of Compressor Internal Thermostat
14
Phase Abnormality
14
Error Comunication Between Ctrl. Pcb And Fan Speed Ctrl. Pcb
15
Thermistor Set Before Expansion Valve Abnormality
16
Activation Of Fan Motor Internal Thermostat
16
Temperature Thermistor Abnormality
17
Cooler Inlet Refrigerant Temperature Thermistor Abnormality
18
Discharge Gas Temperature Thermistor Abnormality
19
Suction Gas Thermister Abnormality
20
Discharge Gas Pressure Sensor Abnormality
21
Suction Gas Pressure Sensor Abnormality
22
Error Comunication Between Ctrl. Pcb
22
Alarm For Operation Error
23
Activation Of Differential Pressure Control
23
Activation Of Thermal Relay For Compressor
24
No Feedback Signal From Water Pump
24
Analysis And Countermeasure Of Abnormal Running
25
It Does Not Run When Operate
25
Pump Stops Before Compressor Running
25
Pump Runs, But Neither Fan Nor Compressor Run
26
Pump And Compressor Run, But Fan Does Not Run
26
Pump And Fan Run But Compressor Does Not Run
26
Unit Stops During Cooling Operation
26
Unit Is Running, But The Cooling Capacity Is Insufficient
28
Unit Is Running, And It Makes A Noise
28
Electrical Wiring
29
Customer Wiring
29
Parts List
30
Wiring Diagram
31
Power Circuit Diagram
31
Control Circuit Diagrams
37
Main Circuit Board Diagram
43
Main Printed Circuit Board (Master)
43
Relais Printed Circuit Board (Subsidiary)
44
Relays Printed Circuit Board
45
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