Table of Contents
Advertisement
Table 5-1: Main Module and Electronics Modules M1-M4 Active Alarms
LCD Display
X Alarms
Inverter Output
Over Current
X Alarms
Inverter Startup
Failure
X Alarms
Inverter
Uncalibrated
X Alarms
Level 2 Overload –
Phase A
Compaq Uninterruptible Power System R12000 XR User Guide
Cause of alarm
At least one electronics module
generates this alarm when it has
reached its maximum operating output
hardware current limits, as defined in
the EEPROM. The module has shut
down to protect itself and the load from
damage. 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 and the number of modules
affected.
This alarm is triggered by one of the
following events:
•
The UPS detects that at least one
electronics module failed to
complete its startup sequence as
expected and was most likely shut
down. In this situation, the alarm is
more of a general status indicator.
It should be accompanied by
another alarm, indicating the
reason for the modules failure to
start.
•
An electronics module has briefly
(for approximately one-quarter of a
second) disconnected from the
system and is attempting to restart.
In this situation, no other alarms
associated with this failure will
occur, with the exception of a
possible Internal Communications
Failure alarm.
At least one electronics module has not
been calibrated together as a set,
which is required for efficient
load-sharing operations.
The UPS detects that the current load
has exceeded 102% of the maximum
capacity available, which means it is
operating in Nonredundant mode.
The UPS will transfer to Bypass mode
after two minutes of this sustained load
level.
continued
Action to take
Reduce the load level to within UPS
operational limits. Initiate a Manual
Bypass Recovery if the UPS remains in
Bypass mode for more than 30
seconds. See the LCD panel to
determine which electronics module
generated the alarm.
If the UPS was operating within its
supported load limits when the problem
occurred, or if the problem persists,
contact Technical Support for
assistance.
The electronics module may not be
fully seated. Remove the bezels and
ensure that each of the electronics
modules is fully inserted into the
chassis.
Contact Technical Support for
assistance.
An autocalibration is required, and the
UPS will automatically schedule the
autocalibration process on detection of
this condition.
Contact Technical Support for
assistance.
Reduce the load level to clear the
alarm. If the alarm persists after load
reduction, see the LCD panel to
determine which electronics module is
reporting overload.
Contact Technical Support for
assistance.
Troubleshooting
continued
5-5
Advertisement
Table of Contents
