Dell 3750W User Manual page 69

Table 15. Typical Alarms and Conditions (continued)
Alarm or Condition
Shutdown Imminent
(Alarm 55)
Continuous Alarm
Battery Test Failed
(Alarm 191)
Intermittent Alarm
Service Battery
(Alarm 149)
Continuous Alarm
Utility Not Present
(Alarm 59)
Intermittent Alarm
Bypass Not Available
(Alarm 105)
Input AC Over Voltage
(Alarm 6)
Intermittent Alarm
Input AC Under Voltage
(Alarm 7)
Intermittent Alarm
Input Under/Over Frequency
(Alarm 8)
Intermittent Alarm
Site Wiring Problem
(Alarm 194)
Continuous Alarm
Remote Emergency Power
Off
(Alarm 12)
Continuous Alarm
Possible Cause
Communication to external
devices stops because the UPS
has entered a state where it may
abruptly stop operating without
further notice unless utility
returns.
A weak battery string was
detected during the last battery
test.
A faulted battery string has
been detected and as a result,
the charger is disabled.
Utility level has fallen below the
Utility Not Present threshold
(typically <25 to 50V).
Utility is outside of the bypass
limits defined in the UPS.
Utility voltage exceeds the
maximum operating range.
Utility voltage is below the
minimum operating range.
The utility frequency is out of
usable frequency range.
An alarm triggers when the
difference between ground and
neutral voltage is >15V.
The external contacts in the
rear of the UPS are configured
for REPO operation and they
have been activated.
Action
The alarm is issued when the battery time
remaining reaches zero. All connected devices
should have already shut down gracefully.
This is a warning notice. Dell recommends
that you replace the batteries soon.
Contact your service representative.
Transfer to battery if supporting load. Power
down if not supporting load.
Check the bypass settings. See "Settings" on
page 42.
The UPS transfers to Battery mode if
supporting load.
The UPS transfers to Battery mode if
supporting load.
The UPS transfers to Battery mode if
supporting load.
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 42).
The UPS de-energizes the load and enters
Standby mode. See "Installing Remote
Emergency Power-off" on page 25 for more
information.
Troubleshooting
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