Specifications

Document No. DER05105 TROUBLESHOOTING
Page 10 of 16 Effective Date 15 Jul 08
Alarm and Fault Messages
Cause Corrective Action
Pump VFD Drive OL Alarm, Ref Troubleshooting Section of User Manual
Pump drive motor drawing excessive
current
Replace motor, if defective, or remove other cause of
excessive current draw.
Pump VFD Fault, Ref Troubleshooting Section of User Manual
VFD fault detected, causing shutdown Check and replace pump VFD.
Pump VFD Ground Warn Alarm, Ref Troubleshooting Section of User Manual
Pump motor has path to ground Check pump motor and connections to drive output
for a grounding; remove ground connection.
Pump VFD In Phase Loss Alarm, Ref Troubleshooting Section of User Manual
Check wiring between VFD and motor; correct
defect(s).
Check motor winding for grounded phase; remove
ground, if any, or replace motor.
Ground detected between VFD and
pump motor in one phase
Replace VFD.
Pump VFD Power Loss Alarm, Ref Troubleshooting Section of User Manual
Incoming power loss or low voltage
supply.
Monitor and correct incoming power defects).
Pump VFD Undervoltage Alarm, Ref Troubleshooting Section of User Manual
Incoming power loss or low voltage
supply
Monitor and correct incoming power defect(s).
Solid End Main Bearing High Temperature Alarm
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).