Compaq R12000 XR User Manual page 53

Table 5-1: Main Module and Electronics Modules M1-M4 Active Alarms
LCD Display
X Alarms
Non-volatile
Memory
Checksum Fail
X Alarms
On Manual Bypass
X Alarms
Output AC Over
Voltage
X Alarms
Output AC Under
Voltage
Compaq Uninterruptible Power System R12000 XR User Guide
Cause of alarm
The UPS detects an EEPROM
Checksum Failure in the electronics
module or Supervisory Board. This
condition must be resolved before the
UPS can complete its initialization and
start successfully.
This alarm is most common after a
flash upgrade that requires an
EEPROM upgrade for the new
embedded software to function
correctly. The upgrade documentation
will describe this condition.
The UPS has been manually switched
into Maintenance Bypass mode. The
UPS can no longer protect the load or
condition the utility to the load.
The UPS detects that its output voltage
is higher than its configured operational
range. The UPS will immediately
initiate a transfer to Bypass mode, if
that mode is available. If Bypass mode
is not available at the time of this
failure, the UPS will shut down
immediately to protect the load.
This could be caused by a hardware
component failure.
This alarm is triggered by one of the
following events:
•
The UPS detects that its output
voltage is lower than its configured
operational range. The UPS will
immediately initiate a transfer to
Bypass mode, if that mode is
available.
•
A significant change in load or load
types occurs that causes a
temporary sag in output voltage. If
Bypass mode is available, the UPS
attempts to automatically recover
and return to an online mode after
a couple of seconds.
If Bypass mode is not available at
the time of the failure, the UPS will
shut down immediately to protect
the load.
continued
Action to take
Check the website
www.compaq.com/ups
(
upgrades.
Contact Technical Support for
assistance.
This is a normal operation.
Contact Technical Support for
assistance.
Contact Technical Support for
assistance.
Troubleshooting
) for Flash
continued
5-7