Liebert 30-130kVA Operation And Maintenance Manual page 88

Table 7 Alarms, functions, and corrective actions (continued)
Actual
Alarm/fault
Name
Displayed Description
On Front of Alarm/
Panel Fault
Batt Battery
Discharging Discharge
Input I Input Current
Imbalance Imbalance
Input Line Fail Input Line Fail
Input OF/UF Input OF/UF
Input Phase Input Phase
Loss Loss
Input Input Under
UnderVoltage Voltage
Fault
Or Latch Dial Freeze
Alarm Mask Mask Mask
Alarm NO YES
Alarm NO YES
Alarm NO NO
Alarm NO YES
Alarm NO YES
Alarm NO NO
Event Log
Mask Meaning and Corrective Action(s)
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
NO YES
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.
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
NO YES 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.
The rectifier input line voltage is outside of
specified limits or the input circuit breaker is
NO YES opened while the battery circuit breaker
remains closed. The battery supplies power
to the critical load through the UPS inverter.
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
NO YES
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.
For all of these input problems the system
will supply power from the battery until the
end of discharge. At that point single input
NO YES 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.
For all of these input problems the system
will supply power from the battery until the
end of discharge. At that point single input
NO YES 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.
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Operation