Table 5-5 Bearing Fault Types
Bearing Status
Description
Startup Calibration Check Fault
A discrepancy between the Bearing Startup check and the stored calibration values has been detected.
Axial Displacement Fault
Axial Orbit has exceeded the limit longer than the maximum time allowable.
Axial Overcurrent Fault
Axial Current has exceeded the limit longer than the maximum time allowable.
Front Radial Displacement Fault
Front Radial Orbit has exceeded the limit longer than the maximum time allowable.
Front Radial X Overcurrent Fault
Front Radial X Current has exceeded the limit longer than the maximum time allowable.
Front Radial Y Overcurrent Fault
Front Radial Y Current has exceeded the limit longer than the maximum time allowable.
Rear Radial Displacement Fault
Rear Radial Orbit has exceeded the limit longer than the maximum time allowable.
Rear Radial X Overcurrent Fault
Rear Radial X Current has exceeded the limit longer than the maximum time allowable.
Rear Radial Y Overcurrent Fault
Rear Radial Y Current has exceeded the limit longer than the maximum time allowable.
5.2 Troubleshooting with the Service Monitoring Tools Software
The SMT software package can be used to view detailed compressor information for operational status indications
and troubleshooting procedures. Please refer to the Service Monitoring Tools User Manual for the details on how to
use the SMT software.
5.2.1 Compressor Fault Troubleshooting
When troubleshooting a compressor fault, detailed analysis of this data should be made (in conjunction with a
compressor recording file, if possible) to determine the specific fault and determine the root cause of fault
occurrence.
Downloading fault and event logs every time a compressor is visited is useful for documenting compressor
operational history.
Fault and event history can be extracted from the compressor memory in the SMT Logged Event and Fault Viewer
tool. See the latest Service Monitoring Tools User Manual for user instructions.
Active compressor fault and alarm messages can be viewed in the SMT Active Alarm/Fault Viewer tool. See the latest
Service Monitoring Tools User Manual for user instructions.
Compressor Alarm and Fault settings can be found in the Configure Alarms/Faults menu option of the Active
Alarm/Fault Viewer tool.
The
Compressor Data Recording
and Playback tool provides a method of reviewing operational conditions without a
connection to the compressor. It also creates a file to electronically transmit for peer review. See the latest Service
Monitoring Tools User Manual for use instructions.
The following principle is applied when having both a fault and/or an alarm limit as triggers. Refer to Figure 5-1
Fault Trigger Methods on page 255 for explanations regarding faults and alarms and the trigger method
terminology is used:
l
Instant fault triggering (INS)
l
Ascending Fault Triggering (AFT)
l
Descending Fault Triggering (DFT)
l
Range Fault Triggering (RFT)
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