APC SYMMETRA 990 - Manual (Page 27)

Maintenance: Predictive Maintenance Screens
Symmetra MW with External Bypass Static Switch Operation Manual - 990-1377D-001 23
Inverter Fans screen
The Inverter Fans screen displays the actual status and Expected Remaining Lifetime (ERL) of the
Inverter Fans. You can sort the data by pressing any of the column labels.
• Stress Status: Shows the actual status of the
Inverter Fans. The possible values are:
– Normal (displayed in green)
– Stressed (displayed in yellow)
– Major Stress (displayed in red)
• ERL (months): Predicts the expected
remaining lifetime of the particular
component.
Main Static Switch Fans screen
The Main Static Switch Fans screen displays the actual status and Expected Remaining Lifetime (ERL)
of the Main Static Switch Fans. You can sort the data by pressing any of the column labels.
• Stress Status: Shows the actual status of the
Main Static Switch Fans. The possible values
are:
– Normal (displayed in green)
– Stressed (displayed in yellow)
– Major Stress (displayed in red)
• ERL (months): Predicts the expected
remaining lifetime of the particular
component.