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Table 5-1: Main Module and Electronics Modules M1-M4 Active Alarms continued
LCD Display Possible Cause Suggested Action
x Alarms
Internal
Communications
Failure
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.
Switch to Maintenance Bypass mode,
and contact Technical Support for
assistance.
x Alarms
Inverter Contactor
Open
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.
Select the Status option on the LCD
menu. Scroll through and examine the
additional alarms related to the failed
electronics module for details on
handling this condition.
x Alarms
Inverter Fault
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.
Contact Technical Support for
assistance.
x Alarms
Inverter Output
Over Current
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.
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.
continued
HP Uninterruptible Power System R12000 XR Models User Guide 5-5
HP CONFIDENTIAL Codename: Sierra Part Number: 146316-002 Last Saved On: 1/24/03 10:20 AM