Compaq R12000 XR User Manual page 50

Troubleshooting
Table 5-1: Main Module and Electronics Modules M1-M4 Active Alarms
LCD Display
X Alarms
Input AC Under
Voltage
X Alarms
Input Under Or
Over Frequency
X Alarms
Internal
Communications
Failure
X Alarms
Inverter Contactor
Open
X Alarms
Inverter Fault
5-4
Cause of alarm
The UPS detects that the input utility
voltage is below the minimum operating
range of about 172v (160v +
hysteresis).
The UPS detects that the input
frequency has a greater deviation than
+/- 5 Hz from the nominal window of
operation.
The UPS encounters an internal
communication problem that is
hindering its ability to successfully
manage its activities and monitor the
current electronics module status. The
UPS will immediately transfer to Battery
mode and issue the Low Battery alarm
until communications are restored.
The UPS detects that an electronics
module has timed out waiting for its
load relay to close during a module
hot-swap. The electronics module has
failed to complete its startup sequence
successfully. This alarm is
accompanied by one or more alarms
from the electronics module that
indicates the root cause of the problem.
At least one electronics module detects
a hardware failure in its inverter,
generates this alarm, and subsequently
shuts down. The UPS may have
transitioned into Automatic Bypass
mode due to the failure, depending on
the load levels present at the time of
the failure.
This could be caused by a hardware
failure.
Action to take
If this occurs in a running system, the
system will immediately transition to
Battery mode until valid utility returns. If
this occurs before a system has
entered an online state, its startup
sequence will not complete, and the
system will shut down until valid utility
returns.
If the condition persists, contact an
electrician.
If this occurs in a running system, the
system will regulate output frequency to
its nominal 50 or 60 Hz. If this occurs
before a system has entered an online
state, its startup sequence will not
complete, and the system will shut
down until valid utility returns.
If the condition persists, contact an
electrician.
Switch to Maintenance Bypass mode,
and contact Technical Support for
assistance.
Select Status on the LCD menu. Scroll
through and examine the additional
alarms related to the failed electronics
module for details on handling this
condition.
Contact Technical Support for
assistance.
Compaq Uninterruptible Power System R12000 XR User Guide
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