Dell H955N User Manual page 66

Table 15. Typical Alarms and Conditions (continued)
Alarm or Condition
Battery test did not run or
was interrupted.
The UPS does not transfer to
Bypass mode.
UPS on Bypass
(Notice 169)
Continuous Alarm
On Manual Bypass
(Notice 143)
Intermittent Alarm
Battery Disconnected
(Alarm 199)
Continuous Alarm
Low Battery Warning
(Alarm 56)
Continuous Alarm
Shutdown Imminent
(Alarm 55)
Continuous Alarm
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Troubleshooting
Possible Cause
One of the conditions listed in
"Running Automatic Battery
Tests" on page 51 was not
present.
The bypass utility does not
qualify.
Bypass mode is disabled.
The UPS is operating from
Bypass mode.
UPS was manually commanded
to transfer to Bypass mode and
will remain in bypass until
commanded.
The UPS does not recognize the
internal batteries.
Battery voltage is lower than the
batteries disconnected level
defined for this UPS. This may
be due to a blown fuse,
intermittent battery
connection, or battery cable
being disconnected.
Battery time remaining or
battery capacity is lower than
the battery low warning level
defined for this UPS.
Communication to external
devices stops because the UPS
has entered a state where it may
abruptly stop operating without
further notice unless utility
returns.
Action
Resolve the condition, then restart the test.
Check the bypass utility. The UPS is receiving
bypass utility power that may be unstable or in
brownout conditions.
Check that the Bypass settings are configured
correctly. See "Settings" on page 41.
The equipment transferred to bypass utility
power. Battery mode is not available and your
equipment is not protected; however, the
utility power continues to be passively filtered
by the UPS. Check for one of the following
alarms: overtemperature, overload, or UPS
failure.
None.
If the condition persists, contact your service
representative.
Verify that all batteries are properly connected.
If the condition persists, contact your service
representative.
This warning is approximate. The actual time to
shutdown may vary depending on the UPS load
and presence of an External Battery Module
(EBM).
The alarm is issued when the battery time
remaining reaches zero. All connected devices
should have already shut down gracefully.