AOpen DE7200 Series Instruções de Operação Página 82
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DE-7200VFDCentrifuge
TROUBLESHOOTING DE-7200 VFD CENTRIFUGE
Possible Cause Isolation Procedure & Corrective Action
Failure Mode 9: Purge System Purges Correctly, But Alarm Goes On At End Of Purge
Interval And Purge Cycle Is Repeated
Actual cabinet pressure below
setting of minimum pressure
sensor
Check cabinet for leakage and correct any defects.
Leakage compensation valve
setting to low, causing re-
purge to occur
Increase cabinet pressure by turning leakage compensation
valve adjustment counter-clockwise. Contact Derrick for
assistance if problem is not corrected.
Failure Mode 10: Purging Indicator Does Not Become Amber During Purging
Low air pressure Check that air supply line is at least 3/4” (12mm). Replace line
if undersize.
Check for stable air pressure of 60-115psi (4-8barg). Raise air
pressure if low.
Excessive leakage from
cabinet
Check for leakage at cabinet door gasket and at all potential
sources of leakage. Maximum permissible leakage is 2.5cfm.
Correct as required.
Tube between relief valve and
flow sensor not air tight
Check that coupling nuts are tight and tube is undamaged.
Correct as required.
Failure Mode 11: Purge System Fails To Turn On Power After Purge Time Has Elapsed
No power to system Check and correct power loss.
Main power contactor turned
off
Switch on contactor.
Blown fuse Check and replace fuse(s) if blown.
Incorrect purge time Check timer setting, and reset to minimum available purge
time. Re-check system operation at new setting. If system
functions properly, return purge time to original setting. If
system fails to close switch, contact Derrick for assistance.
Failure Mode 12: Purge System Relief Valve Remains Open Or Opens Intermittently
Leakage compensation valve
out of adjustment causing high
cabinet pressure
Adjust leakage compensation valve by turning adjustment
clockwise to reduce pressure.
Debris on relief valve disk,
allowing air leakage
Remove relief valve cover, and clean valve disk as required. If
necessary to remove disk and spring from relief valve, mark
location of disk before removal to ensure proper installation. If
cleaning disk fails to eliminate problem, contact Derrick for
assistance.
- 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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