Specifications

TROUBLESHOOTING Document No. DER05105
Effective Date 15 Jul 08 Page 3 of 16
TROUBLESHOOTING DE-7200 CENTRIFUGE
Possible Cause Isolation Procedure & Corrective Action
Failure Mode 3: Excessive Vibration (Cont’d)
Conveyor bearing defective
due to inadequate lubrication,
product entry past seal, or
normal wear
Remove and disassemble bowl, and inspect conveyor bearing
(refer to DER05025)
. Replace conveyor bearing.
Bowl assembly main bearings
defective.
Remove rotating assembly, and replace bearing (refer to
DER05024)
.
Excessive buildup of solids in
bowl and/or conveyor.
Perform cleanout procedure (refer to DER05023).
Failure Mode 4: No Liquid Discharge, Untreated Feed Material Exits Liquid Discharge
Outlet
Shut down feed pump and bowl assembly drive motor, but keep
conveyor motor running and admit rinse water into machine. If
solids emerge before bowl fully stops, re-start centrifuge.
Open top cover, and insert hose into liquid and solids discharge
openings and flush bowl interior with water (preferably hot
water).
Buildup of solids between
flights; solids not being
transported to discharge but
are discharged with liquid
If flushing is unsuccessful in clearing the blockage, remove
rotating assembly and remove conveyor to facilitate thorough
cleaning. (refer to DER05026
).
Failure Mode 5: High Power Consumption, Machine Clogged
Solids accumulated within case Open top cover, and thoroughly clean case interior, bowl
exterior, and solids discharge chute.
Failure Mode 6: Machine Clogged Upon Starting After a Brief Shutdown
Perform cleanout procedure (refer to DER05023). Excessive solids volume in
feed due to sedimentation in
supply line
Prevent future repetition by clearing feed line immediately after
shutting down machine.
Failure Mode 7: Machine Shutdown Due to Excessive Power Consumption During Startup
Discharge chute clogged Clear discharge chute of all accumulated solids.