Specifications

Document No. DER05105 TROUBLESHOOTING
Page 8 of 16 Effective Date 15 Jul 08
Alarm and Fault Messages
Cause Corrective Action
Conveyor VFD Ground Warn Alarm, Ref Troubleshooting Section of User Manual
Conveyor motor has path to ground Check for ground in conveyor motor and connections
to drive output, and correct defect.
Conveyor 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.
Conveyor VFD Power Loss Alarm, Ref Troubleshooting Section of User Manual
Incoming power loss or low voltage
supply
Monitor and correct incoming power defect(s).
Conveyor VFD Undervoltage Alarm, Ref Troubleshooting Section of User Manual
Incoming power loss or low voltage
supply
Monitor and correct incoming power defect(s).
Electrical Enclosure High Temperature Alarm
Check that air conditioner is operative; repair or
replace air conditioner, if defective.
Reduce load by decreasing bowl, conveyor
differential speed, and/or pump feed rate.
PLC has detected high temperature
inside control cabinet
Check VFD temperatures (refer to DER04098
);
replace VFD if defective.
Electrical Enclosure High Temperature Fault and Shutdown
Check that air conditioner is operative; repair or
replace air conditioner, if defective.
Reduce load by decreasing bowl, conveyor
differential speed, and/or pump feed rate.
PLC has shut down centrifuge due to
high temperature inside control cabinet
Check VFD temperatures (refer to DER04098
);
replace VFD if defective.
Interior temperature of control cabinet
too high, causing shutdown
Check that air conditioner is operating; repair or
replace, as indicated. Inspect cabinet interior, and
remove cause of high temperature, if any.
Re-start centrifuge after removing cause of high
temperature.