Specifications

TROUBLESHOOTING Document No. DER05105
Effective Date 15 Jul 08 Page 9 of 16
Alarm and Fault Messages
Cause Corrective Action
Emergency Stop Switch Activated, Shutdown
EMERGENCY STOP pressed Remove cause for emergency stop, and then re-start
centrifuge.
High Vibration Fault and Shutdown, Correct Problem and Press Reset Button
Excessive vibration has caused
vibration switch to trip, resulting in
power interruption and centrifuge
shutdown
Rotating assembly overloaded or clogged, producing
out-of-balance condition. Remove cause of
excessive vibration and re-start centrifuge.
Liquid End Main Bearing High Temperature Alarm
Temperature sensor connection
insecure or disconnected
If reading is constantly about 392°F (200°C), check
and correct connection (refer to DER03022
and
electrical schematic diagram in Section 11).
Insufficient bearing lubrication Lubricate bearings (refer to DER05023).
Excess grease Remove grease fitting, and direct jet of filtered
compressed air to remove grease.
Incorrect grease Lubricate with recommended grease (refer to
DER05023
).
Defective bearing Replace both main bearings (refer to DER05024).
Liquid End Main Bearing High Temperature Fault and Shutdown
Insufficient bearing lubrication Lubricate bearings (refer to DER05023).
Excess grease Remove grease fitting, and direct jet of filtered
compressed air to remove grease.
Incorrect grease Lubricate with recommended grease (refer to
DER05023
).
Defective bearing Replace both main bearings (refer to DER05024).
Pump VFD Alarm, Ref Troubleshooting Section of User Manual
Pump VFD needs re-booting Press STOP, and cycle power off and then on. If
alarm does not clear, replace pump VFD.
Pump VFD Communications Error
Confirm that green LED next to Ethernet cable is
lighted, indicating that hub is functional.
Check connections between pump VFD and PLC,
and correct any defects.
Pump VFD not communicating with
PLC
Replace pump VFD, if no other defect is found.