APC SYMMETRA 990 User Manual download pdf (Page 27)

23Symmetra MW II with Internal Bypass Static Switch - Operation - 990-1756C-001

Maintenance

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.

Warning: Only personnel trained in the construction and operation of the equipment,

and the electrical and mechanical hazards involved, may install or remove system

components.

How to access the Predictive Maintenance screens

Inverter DC Capacitors screen

The Inverter DC Capacitor screen displays the actual status and Expected Remaining Lifetime (ERL) of

the Inverter DC Capacitors. You can sort the data by pressing any of the column labels.

• Stress Status: Shows the actual status of the

Inverter DC Capacitors. 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.

1. Press the Operation button in the bottom left

corner to access the Operation screen.

2. Press the Predictive Maintenance button to access

the Predictive Maintenance screens.

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APC SYMMETRA 990 User Manual Page 27