Emerson Liebert NXL 250 kVA, Operation And Maintenance Manual

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UPS Alarm and Status Messages
Liebert
®
NXL
™
96
MMS
Xfer
Inhibit
This summary event means the conditions
required to perform a transfer to bypass are not
met.
This status message is self-clearing. When the
condition is no longer present, the message and
any control activity tied to the status event
reverts to normal.
The condition clears from the Active Event Window
when manual transfers are enabled.
Possible reasons for this condition are:
1. With the collective on UPS inverters and Module
Output Breaker (MOB) open (if installed) active or
2. Manual Transfer Inhibit is active or
3. Not enough BPSSs are available to support the
measured load or
4. Any module's BPSS is connected to the
collective.
Parametric Data (Note 1)
Bit Reason
0x0001 Bypass not Qualified
0x0002 Bypass to Output Phase Error
0x0004 Phase Error Exceeds Manual Transfer
Limit Setting
0x0008 Voltage Exceeds Manual Transfer Limit
Setting
0x0010 BFB Open
0x0020 BPSS Board has Failed
0x0040 Bypass Sync Error
0x0080 BPSS not Enabled
0x0100 Bypass Overload Shutdown
Module
Alarm
Active
One or more modules have active event(s).
Press “SILENCE” to silence the audible alarm.
From the front panel display, touch “Status View
On” in the mimic one-line pane. A pop-up module
status view displays which of the modules have an
active event and the type of event (Fault, Alarm).
Go to the module(s) and investigate.
Module In
Standby
This module has gone into standby mode due to
Intelligent Paralleling operation. Since the load
can be powered and the required redundancy
met with fewer modules, this module has
automatically been taken offline to conserve
power and improve operating efficiency
This status message is self-clearing. When the
condition is no longer present, the message and
any control activity tied to the status event
reverts to normal.
Module Output
Breaker (MOB)
Open
The module output breaker indicates that it is in
the open position.
Multiple
Fan Fail
This summary event is active when more than
one fan has failed.
Press “SILENCE” to silence the audible alarm.
Press “RESET” to clear the alarm.
If the alarm will not clear, contact your factory-
authorized service provider
On Gen
Active
The UPS input source is generator.
An external signal is being used to inform the
UPS when the power source is generator rather
than utility, and the signal is active.
This status message is self-clearing. When the
condition is no longer present, the message and
any control activity tied to the status event
reverts to normal.
Under normal conditions, no user action is
required.
If the UPS is not actually on generator and this
message is active, contact your factory-authorized
service provider.
Table 10 Liebert NXL alarm and status messages (continued)
Event Message Event Definition Recommended Action