APC 990 User Manual
Symmetra MW with External Bypass Static Switch Operation Manual - 990-1377D-001
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Troubleshooting
Alarm Types
The color of the top of the screen changes from blue to red when an alarm situation occurs and the alarm
symbol is shown at the top of the screen.
symbol is shown at the top of the screen.
Alarm button
Alarm levels
There are three different alarm levels.
Info.
Informational Alarm. No immediate action required. Check the cause of the alarm at next
maintenance visit.
Warning.
Warning Alarm. Example: The UPS system may have gone into bypass. The load remains
supported, but action must be taken. Call Technical Support. The area on the right side of the top screen
alternates between blue and red.
alternates between blue and red.
Severe.
Severe Alarm. Take immediate action. Call Technical Support. The red area of the top of the
screen alternates between blue and red.
How to silence the alarm
Touch the Alarm Button or any other display button to silence the alarm.
Touching the alarm button will display the Active Alarms screen showing all active
alarms, along with a methodology for addressing each alarm.Touching the alarm button
or any other display button will automatically silence the alarm.
alarms, along with a methodology for addressing each alarm.Touching the alarm button
or any other display button will automatically silence the alarm.