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Operation
80
Batt
Discharging
Battery
Discharge
Alarm NO YES NO YES
The battery is discharging. This occurs
whenever the battery supplies power to the
load for more than five seconds because of
input power failure, a rectifier problem, or
an overload condition. If the input power or
a source of auxiliary power is restored to
the UPS module, the UPS automatically
returns to normal operation. Watch the
battery voltage carefully. Reduce the load
(begin controlled shutdown) to extend the
battery back-up time. Start the back-up
generator, if available. Reset the UPS
alarms after the input power is restored.
The message clears after 30 seconds.
Input I
Imbalance
Input Current
Imbalance
Alarm NO YES NO YES
With input current levels above 30% of
nominal and all three phase voltages within
5% of each other, there is a difference
between any single input phase current and
the average input phase current of more
than 25%. The UPS will open the Input filter
Contactor. The alarm will clear when the
difference in current falls below 20%, but
the Input filter contactor will need to be
reset, using the front panel. Refer to
manual start up instructions.
Input Line Fail Input Line Fail Alarm NO NO NO YES
The rectifier input line voltage is outside of
specified limits or the input circuit breaker is
opened while the battery circuit breaker
remains closed. The battery supplies power
to the critical load through the UPS inverter.
Input OF/UF Input OF/UF Alarm NO YES NO YES
The input frequency is > ± 5% of the
nominal frequency. The UPS will begin
using the battery to supply power, if by the
end of discharge the problem is not
corrected, for single input units power to the
load will be lost, for dual input units the
system will attempt transfer to Bypass if
qualified and available.
Input Phase
Loss
Input Phase
Loss
Alarm NO YES NO YES
For all of these input problems the system
will supply power from the battery until the
end of discharge. At that point single input
systems will lose power to the load. Dual
input systems will attempt to transfer to
bypass if qualified and available. Call
Liebert Global Services for Assistance.
Input
UnderVoltage
Input Under
Voltage
Alarm NO NO NO YES
For all of these input problems the system
will supply power from the battery until the
end of discharge. At that point single input
systems will lose power to the load. Dual
input systems will attempt to transfer to
bypass if qualified and available. Call
Liebert Global Services for Assistance.
Table 7 Alarms, functions, and corrective actions (continued)
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)