HP R12000 XR, Maintenance And Service Manual, Page: 55 / 69

Troubleshooting
HP UPS R12000 XR Models Maintenance and Service Guide 5-5
HP CONFIDENTIAL Codename: Sierra Part Number: 221273-001 Last Saved On: 7/31/02 8:59 AM
Table 5-1: Main Module (MM) and Electronics Modules (M1-M4) Active Alarms
continued
LCD Display Possible Cause Actions to Take
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 immediately transfers to Battery
mode and issues the Low Battery alarm
until communications are restored.
Switch to Manual Bypass mode. Locate
and replace the faulty module or faulty
supervisory board.
x Alarms
Inverter Contactor
Open
The UPS detects that an electronics
module has timed out while 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. Switch to Manual Bypass mode. Locate
and replace the faulty module.
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. Refer to
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, switch to
Manual Bypass mode. Replace the
faulty module.
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