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Operation
83
Inv Ovld
Phase C
Inverter
Overload
Phase C
Alarm NO YES NO YES
With the load on UPS, PhaseB output KVA
or KW or RMS current has exceeded 105%
of the nominal per phase rating. The UPS
will begin sending the time remaining until a
transfer or shutdown will occur, per the
Overload vs. Time Curve. The alarm
condition will clear when the overload
returns to below the nominal rating.
Low Pwr
Factor Warn
Low Power
Factor
Warning
Alarm NO YES NO YES
On any output phase that is supplying at
least 15% of its rated KVA, the measured
output power factor is below 0.50, leading
or lagging.
Pulse
Paralleling
Pulse Parallel
Activated
Alarm NO YES NO YES
With the load being supplied by the inverter,
the measured load current exceeds the
auto-Parallel Current Limit or the Pulse-by-
Pulse Current Limit set point values. If the
Static Bypass is available, the SBS supplies
supplemental power. If at the end of 10
cycles the load current has not returned to
below 105%, the Static Bypass will be left
on and the inverter will be turned off. If the
over current has cleared the Inverter will be
left on and the SBS will be turned off.
Auto rexfer
failed
Auto
Retransfer
Failed
Alarm YES YES NO YES
After performing a recoverable transfer to
bypass, with Auto Rexfer enabled, the Auto
Rexfer time out (default=5minutes) has
elapsed before retransfer could be
performed. A manual retransfer must be
performed, which will then clear the lockout
and zero the retransfer/ hour counter. If the
manual transfer is inhibited, the Inverter
may be latched off due to another fault.
Contact Liebert Global Services.
Excessive
Auto Rexfer
Excessive
Auto
Retransfer
Alarm YES YES NO YES
The UPS has determined that the actual
number of Auto Retransfers in the past hour
has exceeded the permitted maximum.
(user settable, default=5). This alarm
should not be issued if auto retransfers are
disabled by setting the maximum attempts
to “0”. A manual retransfer must be
performed, which will then clear the lockout
and zero the retransfer/hour counter.
Aux Power
Fail
Aux Power Fail Alarm NO YES NO YES
If the unit is supplying power to an Auxiliary
device, this alarm indicates that the system
has detected a failure in the Aux. Power
circuit.
EPO Power
Fail
EPO Power
Fail
Alarm NO YES NO YES
If the unit is supplying power to an Auxiliary
device, this alarm indicates that the system
has detected a failure in the Aux. Power
circuit.
LBS Power
Fail
LBS Power
Fail
Alarm NO YES NO YES
Power to the Load Bus Sync circuit has
been lost. Check external wiring. Contact
Liebert Global Services.
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)