Emerson Liebert NXL 250 kVA, Руководство по эксплуатации и обслуживанию

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UPS Alarm and Status Messages
83 Liebert
®
NXL
™
BPSS Start Inhibit
When starting the module BPSS's in a 1+N
system without a MBB, there are not enough
module BPSS's ready with their MOB closed to
support the rated capacity.
This alarm is a latching alarm that must be
cleared at each module after enough Bypass
Static Switches are available to support the
system load.
Press “SILENCE” to silence the audible alarm.
Contact your factory-authorized service provider if
there are enough Bypass Static Switches available
to support the existing system load.
BPSS Unable
A problem has been detected in the Bypass
Static Switch.
Press “SILENCE” to silence the audible alarm.
Press “RESET” to attempt to clear the fault.
Contact your factory-authorized service provider.
Breaker Close
Fail
This is a summary event that informs the user
that a circuit breaker that was either signaled to
close or was manually closed failed to report a
closed status.
The Breaker Close Fail event indicates a
mismatch between the expected state of a
breaker and the reported state of the breaker.
Press “SILENCE” to silence the audible alarm.
Check the One-Line Display and the Active Event
Window to determine which breaker or switch is
open.
If the open breaker cannot be reset or closed, or if
all breakers are closed but the One-Line Display
does not agree, or the alarm cannot be cleared,
contact your factory-authorized service provider.
Breaker Open
Fail
This is a summary event that informs the user a
circuit breaker that was either signaled to open
or was manually opened failed to report an open
status.
The Breaker Open Fail event indicates a
mismatch between the expected state of a
breaker and the reported state of the breaker.
Press “SILENCE” to silence the audible alarm.
Check the One-Line Display and the Active Event
Window to determine which breaker or switch that
should be open is still closed.
If a breaker that should be open shows closed, or if
the breaker in question actually is open but the
fault is still present, attempt to clear the fault by
pressing “RESET.”
If the event does not reset, contact your factory-
authorized service provider.
Byp
Overload
Ph A
The critical load is greater than 110% while the
UPS is on bypass. The controls may shut the
unit down if the overload condition does not clear
within the allotted time. Allotted time is variable,
and is inversely proportional to the amplitude of
the overload, i.e., the greater the amplitude of
the overload, the less time the unit continues to
support the load.
This alarm is self-clearing. When the condition is
no longer present, the alarm and any control
activity tied to the alarm reverts to normal.
Press “SILENCE” to silence the audible alarm.
Observe the calculated load percentage on A
phase displayed on the Module Output Meter. If
the A phase steady state load percentage exceeds
110%, perform the following:
If Maintenance Bypass is available, follow
Standard Operating Procedures to transfer the
load to Maintenance Bypass.
Investigate the overload condition.
If the Module Output Meter does not indicate an
overload condition, perform the previous steps and
contact your factory-authorized service provider.
Byp
Overload
Ph B
The critical load is greater than 110% while the
UPS is on bypass. The controls may shut the
unit down if the overload condition does not clear
within the allotted time. Allotted time is variable,
and is inversely proportional to the amplitude of
the overload, i.e., the greater the amplitude of
the overload, the less time the unit continues to
support the load.
This alarm is self-clearing. When the condition is
no longer present, the alarm and any control
activity tied to the alarm reverts to normal.
Press “SILENCE” to silence the audible alarm.
Observe the calculated load percentage on B
phase displayed on the Module Output Meter. If
the B phase steady state load percentage exceeds
110%, perform the following:
If Maintenance Bypass is available, follow
Standard Operating Procedures to transfer the
load to Maintenance Bypass.
Investigate the overload condition.
If the Module Output Meter does not indicate an
overload condition, perform the previous steps and
contact your factory-authorized service provider.
Table 10 Liebert NXL alarm and status messages (continued)
Event Message Event Definition Recommended Action