AOpen DE7200 Series Instruções de Operação Página 80
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5-18 31 Dec 13
DE-7200VFDCentrifuge
TROUBLESHOOTING (CONT’D)
In case of control system malfunction, with electric power shut down, locked out, and tagged out
check that PLC connectors are fully seated in their receptacles. Correct as necessary before
proceeding with further troubleshooting.
Troubleshooting Chart
The troubleshooting chart consists of failure modes, possible cause(s), and recommended
course(s) of action. All electrical continuity checks in this procedure are performed without electric
power supplied to the centrifuge. Lock out and tag out equipment before attempting to perform any
continuity check.
WARNING! CONTINUITY CHECKS MUST BE PERFORMED WITHOUT
ELECTRIC POWER APPLIED TO CENTRIFUGE. LOCK OUT AND TAG OUT
ELECTRIC POWER BEFORE ATTEMPTING CONTINUITY CHECKS.
In addition to the troubleshooting information, the technician should refer to the schematic diagrams
at the rear of this section and to the appropriate schematic and wiring diagrams in Section 8 and
description and theory of operation in Section 1 for additional assistance in troubleshooting.
TROUBLESHOOTING DE-7200 VFD CENTRIFUGE
Possible Cause Isolation Procedure & Corrective Action
Failure Mode 1: Acceptable Liquid, Cake Too Thin
Insufficient solids in feed Increase weir opening (refer to Section 4).
Reduce differential speed.
Drop in feed pump rate Increase feed rate.
Check feed pump; if required, check wear and replace worn
parts.
Check pump shaft seal, and correct any defects.
Select RESET on Fault Reset screen to reset flow rate.
Failure Mode 2: Poor Liquid Quality, Acceptable Cake
Bowl speed too low Increase bowl speed.
Reduce feed rate.
Excessive amount of solids in
feed
Reduce quantity of solids in feed or add dilution stream if
possible.
Change in feed characteristics Reduce quantity of solids in feed or generally optimize
machines settings, i.e. adjust bowl speed, differential speed,
and weir opening.
Conveyor flights worn
excessively
Measure clearance through inspection port (Figure 5-9).
Replace rotating assembly if excessive wear is found (refer to
Rotating Assembly maintenance).
- DE-7200 Centrifuge 1
- CONTENTS 5
- Section 6
- CONTENTS 7
- SECTION 1 - INTRODUCTION 9
- EQUIPMENT USE 10
- DESCRIPTION 10
- Rotating Assembly 11
- Drive Motors 12
- Control Cabinet 12
- Case and Base 13
- Vibration Switch 13
- MECHANICAL OPERATION 14
- CONTROL SYSTEM 15
- PRODUCT SUPPORT 16
- CONTACT INFORMATION 16
- SECTION 2 - SAFETY 17
- Equipment Handling 18
- Maintenance 19
- Storage 19
- MSDS’S (CONT’D) 20
- SECTION 3 - INSTALLATION 21
- STORAGE 22
- Rotating Assembly and Motors 22
- INSTALLATION SEQUENCE 23
- EQUIPMENT HANDLING 24
- EQUIPMENT HANDLING (CONT’D) 26
- Liquid Discharge 29
- Solid Discharge Chute 29
- EQUIPMENT LEVELING 29
- FEED AND FLUSH CONNECTIONS 31
- COMPRESSED AIR 33
- FEED PUMP 33
- ELECTRIC POWER CONNECTIONS 33
- Connection Options 33
- POLARITY TEST 36
- SENSOR CONNECTIONS 37
- MACHINE STARTUP 38
- GENERAL 39
- SOFTWARE VERSION 39
- OPERATING SAFETY 39
- Purge System Bypass 40
- INITIAL STARTUP 41
- INITIAL STARTUP (CONT’D) 42
- OPERATING INSTRUCTIONS 43
- NORMAL STARTUP 44
- COLD CLIMATE STARTUP 45
- OPERATION 45
- Bowl Speed 47
- Conveyor Differential Speed 47
- Pond Depth 47
- Pond Depth (Cont’d) 48
- BEARING TEMPERATURES 50
- MOTOR TORQUE TREND 50
- SYSTEM DIAGNOSTICS 51
- PERFORMANCE STATUS 51
- ALARM AND FAULT MESSAGES 52
- VFD STATUS 53
- VFD STATUS (CONT’D) 54
- PUMP VFD FAULT STATUS 54
- VFD TEMPERATURE TRENDS 55
- VFD FAULT RESET 55
- VFD FAULT RESET (CONT’D) 56
- SETUP SCREEN 56
- PUMP SETUP SCREEN 57
- CLEAN OUT 57
- CLEAN OUT (CONT’D) 58
- Automatic Cleanout 58
- Manual Cleanout 58
- NORMAL SHUTDOWN 59
- AUTOMATIC SHUTDOWN 59
- Excessive Vibration 59
- Main Bearing Temperatures 59
- Excessive Bowl Speed 60
- Conveyor Clutch Trip 60
- EMERGENCY SHUTDOWN 61
- Electric Power Shutdown 61
- Mechanical Shutdown 61
- SECTION 5 - MAINTENANCE 63
- PREVENTIVE MAINTENANCE 64
- LUBRICATION CHART 65
- GEARBOX OIL LEVEL CHECK 65
- GEARBOX OIL CHANGE 66
- DRIVE BELT REPLACEMENT 67
- PURGE SYSTEM 69
- Bypassing Purge System 69
- Initial Purge Time Setting 70
- Leakage Compensation Test 71
- Rotating Assembly Removal 73
- Cleaning and Inspection 75
- Installation 76
- RECOMMENDED SPARE PARTS 77
- TROUBLESHOOTING 79
- Troubleshooting Procedure 79
- TROUBLESHOOTING (CONT’D) 80
- Troubleshooting Chart 80
- CONTROL COMPONENT INDICATORS 98
- MAINTENANCE 100
- DE-7200VFDCentrifuge 103
- CONTROL ENCLOSURE ASSEMBLY 141
- DE-7200 EX-PROOF 460/480/60/3 141
- 16472-00-002 141
- DE-7200 EX-PROOF 380/400/3 143
- 16472-00-003 143
- DE-7200 EX-PROOF 575/600/60/3 145
- 16472-00-004 145
- DE-7200 460/480/60/3 147
- 16472-00-005 147
- PURPOSE 149
- DE-7200VFDCentrifuge 150
- INSTALLATION 156
- HMI Server Installation 156
- Electric Power Connections 156
- Ethernet Connections 157
- Appendix A-HMIServerSystem 158
- OPERATING HMI SERVER 159
- Startup and Shutdown 159
- Operation 159
- Operation (Cont’d) 160
- REFERENCE DRAWINGS 164
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