Specifications

TROUBLESHOOTING Document No. DER05105
Effective Date 15 Jul 08 Page 5 of 16
Alarm and Fault Messages
Cause Corrective Action
Bowl High Torque Alarm, Reduce Feed Rate
Bowl torque exceeds pre-set limit Reduce feed rate.
Bowl High Torque Fault and Shutdown, Perform Cleanout and Reduce Feed Rate
Bowl torque exceeds pre-set limit Following automatic shutdown, perform cleanout
procedure to remove solids buildup, and re-start
centrifuge at reduced feed rate.
Bowl VFD Alarm, Ref Troubleshooting Section of User Manual
Defective bowl VFD Press STOP, and cycle power off and then on. If
alarm does not clear, replace bowl VFD.
Bowl VFD Communications Error
Confirm that green LED next to Ethernet cable is
lighted, indicating that hub is functional.
Check connections between bowl VFD and PLC, and
correct any defects.
Bowl VFD not communicating with PLC
Replace bowl VFD, if no other defect is found.
Bowl VFD Drive OL Alarm, Ref Troubleshooting Section of User Manual
Bowl drive motor drawing excessive
current
Replace motor, if defective, or remove other cause of
excessive current draw.
Bowl VFD Fault and Shutdown, Ref Troubleshooting Section of User Manual
VFD fault detected, causing shutdown Check and replace bowl VFD.
Bowl VFD Ground Warn Alarm, Ref Troubleshooting Section of User Manual
Bowl motor has path to ground Check for ground in bowl motor and connections to
drive output, and correct defect.
Bowl VFD In Phase Loss Alarm, Ref Troubleshooting Section of User Manual
Check wiring between VFD and motor; correct
defect(s).
Ground detected between VFD and
motor in one phase
Check motor winding for grounded phase; remove
ground, if any, or replace motor.
Bowl VFD Power Loss Alarm, Ref Troubleshooting Section of User Manual
Incoming power loss or low voltage
supply
Monitor and correct incoming power defect(s).