Liebert 30-130kVA Operation And Maintenance Manual page 89

Table 7 Alarms, functions, and corrective actions (continued)
Actual
Alarm/fault
Name
Displayed Description
On Front of Alarm/
Panel Fault
Input Input Over
OverVoltage Voltage
Input current Input Current
limit Limit
Battery CB Battery CB
Open Open
Batt sup-
Batt Supp
plement is
Active
active
Bypass Sync Bypass Sync
Error Error
Bypass
Byp out
Voltage Out of
Tolerance
Tolerance
Bypass Line Bypass Line
Fail Fail
Fault
Or Latch Dial Freeze
Alarm Mask Mask Mask
Alarm NO NO
Alarm NO YES
Alarm NO YES
Alarm NO YES
Alarm NO YES
Alarm NO YES
Alarm NO YES
Event Log
Mask Meaning and Corrective Action(s)
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.
The RMS input current has reached the
NO YES Input Current Limit setting. Check the UPS
load.
The module battery circuit breaker (MBD) is
open. This circuit breaker might have been
opened either manually or automatically in
a UPS shutdown procedure. If the UPS is
operating with this breaker open, the critical
NO YES load is not protected from loss of the utility
source power. Manual closure of the battery
breaker is inhibited. You must use the front
panel to set up the sequence for manual
battery re-closure. Follow the instructions in
manual start-up.
This condition is indicated when the Batt
Discharging and Input Undervoltage alarms
are simultaneously active. The alarm will
NO YES
clear when the Inp. Undervoltage alarm
clears and/or if the rectifier turns off and/or
if the Batt Dischg alarm clears.
The bypass is out of sync to a sufficient
degree that transfer to Static Bypass is
inhibited. An interrupted transfer will be
NO YES
permitted only in the case of a critical fault.
If this alarm persists, contact Liebert Global
Services.
One or more bypass voltages is below 80%
or above 115% of the nominal value. If the
load is on UPS, and the unit is a dual input
unit, transfers to bypass will be inhibited. If
NO YES the unit is a single input unit, the system will
shut down. The Alarm will be cleared 5
seconds after all voltage are again with 85-
110% of nominal. If the load has been shut
down, re-start will be required.
The bypass source has dropped below 35V
per phase. On single input units, the UPS
will shut down. On dual input units, transfer
to the bypass will be inhibited. The alarm
NO YES
will be cleared five seconds after all
voltages again exceed 45V. If the unit is
already on Bypass when this occurs, power
to the load will be lost.
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Operation