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Symmetra® MW with Internal Bypass Static Switch - User Guide - 990-1756A-001 25
Predictive Maintenance Screens
The Predictive Maintenance screens display the stress status and the Expected Remaining Lifetime
(ERL) of the critical components of the Symmetra MW UPS system.
There are five Predictive Maintenance screens:
• Inverter DC Capacitors screen
• Inverter AC Capacitors screen
• Top Fans screen
• Inverter Fans screen
• Main Static Switch Fans screen
Inverter DC Capacitors screen
The Inverter DC Capacitor screen displays the actual status and Expected Remaining Lifetime (ERL)
of the Inverter DC Capacitors. It is possible to sort the data on the screen by touching any of the
column labels.
• Stress Status: States the actual status of the Inverter DC Capacitors. The possible values are:
– Normal (displaying in green)
– Stressed (displaying in yellow)
– Major Stress (displaying in red)
• ERL (months): Predicts the expected remaining lifetime of the particular component.
Normal
Normal
Predictive Maintenance
Inverter DC Capacitors
5.39 PM
Page 1 of 5
TypeNumber Stress Status
ERL (months)*
OK0046 DC Cap
OK0046 DC Cap
OK0046 DC Cap
OK0046 DC Cap
OK0046 DC Cap
OK0046 DC Cap
OK0046 DC Cap
OK0046 DC Cap
OK0046 DC Cap
OK0046 DC Cap
OK0046 DC Cap
OK0046 DC Cap
120
120
120
120
120
120
120
120
120
120
120
120
Normal
Normal
Normal
Normal
Normal
Normal
Normal
Normal
Normal
Normal
Normal
Normal
1
2
3
4
5
6
7
8
9
10
11
12
* ERL - Expected Remaining Lifetime