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Operation
74
Alarm Messages
The alarm message area displays the alarm conditions that are present within the UPS system. The
table below shows the default values of masks for each alarm/fault, the meaning of the Alarm and
possible corrective actions.
The following information applies to the table.
1. Latch Masks, Dial Masks and unshaded Event log masks may be changed by the user. The user
may not change any Freeze Masks.
2. The default alarm names for Input Contact 1 through Input Contact 8 can be modified by the
user.
Table 7 Alarms, functions, and corrective actions
Actual
Alarm/fault
Name
Displayed
On Front
Panel
Description
of Alarm/
Fault
Fault
Or
Alarm
Latch
Mask
Dial
Mask
Freeze
Mask
Event Log
Mask Meaning and Corrective Action(s)
Battery Fuse
Fail
Battery Fuse
Fail
Fault YES YES NO YES
Control Logic has determined that the
battery breaker(s) is closed and the battery
fuse has been open for 10 seconds or
longer. Battery back-up is no longer
available. Liebert Global Services should
be called immediately.
Battery Low
xfer
Battery Low
Transfer
Fault YES YES YES YES
Control Logic has determined that the
battery breaker(s) is closed and the battery
voltage has dropped below the End of
Discharge limit. The UPS will transfer to
bypass. If the transfer is successful, the
UPS will be shut down. If the transfer was
unsuccessful, logic will attempt to complete
a System Shutdown before control power is
lost. Verify that input power is now available
and restart the UPS following the
instructions in this manual. If the system
fails to restart properly contact Liebert
Global Services.
DC Ov
Transient
DC Overvolt
Transient
Fault YES YES NO YES
DC bus voltage is 15% or more over the
nominal DC Bus Voltage. The UPS will
transfer the load to Bypass and will shut
down and isolate the UPS Module. Contact
Liebert Global Services immediately
Inp Phase
Rot Error
Input Phase
Rotation Error
Fault NO NO NO YES
The power conductors on the Input line are
not wired to the UPS in the required
sequence. This alarm should appear only
during initial start-up or after a repair to the
source power system. Disconnect power
from the Input line and correct the wiring.
Liebert Global Services must be present
during initial start-up of your UPS System.
Rectifier Fuse
Fail
Rectifier Fuse
Fail
Fault YES YES NO YES
At least one fuse has opened. The UPS
automatically transfers the critical load to
the bypass line. Contactors trip open to
shut down and isolate the UPS module.
Contact Liebert Global Services
immediately. Do not attempt to reset the
circuit breakers.