APC SYMMETRA MW II User Manual download pdf (Page 29)

25Symmetra MW II with External Bypass Static Switch Operation Manual - 990-1377E-001

• 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.

How to Change the Air

Filters

Check the air filters at regular intervals (every three months under normal working conditions) for

accumulated dust on the surface facing the finishing panels. Change all filters at the same time.

1. Pull the lower part of the top finishing panel off the UPS.

2. Lift the finishing panel off the dead front panel and remove.

3. Follow this procedure until all panels in one column have been removed. Use the same procedure

for the next column of panels until all panels have been removed from the UPS system.

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APC SYMMETRA MW II User Manual Page 29