User Manual

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Troubleshooting
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Table 17. Alarms, Notices, and Events
Alarms, Notices, and Events ActionPossible Cause
Shutdown Imminent
(Alarm 55)
Continuous Alarm
Communication to external
devices stops because the UPS
has entered a state where it may
abruptly stop operating without
further notice unless utility
returns.
The alarm is issued when the battery time
remaining reaches zero. All connected devices
should have already shut down gracefully.
Battery Test Failed
(Notice 191)
Intermittent Alarm
A weak battery string was
detected during the last battery
test.
This is a warning notice. Dell recommends
that you replace the batteries soon.
Service Battery
(Alarm 149)
Beeping Alarm
A faulted battery string has
been detected and as a result,
the charger is disabled.
Contact your service representative.
Utility Not Present
(Notice 59)
Intermittent Alarm
The utility level has fallen
below the Utility Not Present
threshold (typically <25 to
50V).
Transfer to battery if supporting load. Power
down if not supporting load.
Bypass Not Available
(Event 105)
No Alarm
The utility is outside of the
bypass limits defined in the
UPS.
Check the bypass settings. See “Settings” on
page 48.
Input AC Over Voltage
(Alarm 6)
Beeping Alarm
The utility voltage exceeds the
maximum operating range.
The UPS transfers to Battery mode if
supporting load.
Input AC Under Voltage
(Notice 7)
Intermittent Alarm
The utility voltage is below the
minimum operating range.
The UPS transfers to Battery mode if
supporting load.
Input Under/Over Frequency
(Notice 8)
Intermittent Alarm
The utility frequency is out of
usable frequency range.
The UPS transfers to Battery mode if
supporting load.
Site Wiring Problem
(Alarm 194)
Beeping Alarm
An alarm triggers when the
difference between ground and
neutral voltage is >15V.
Have a qualified electrician correct the wiring
problem. If the UPS is not wired with a neutral
wire, Site Fault should be disabled in the
Settings menu (see page 48).