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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
On Manual Bypass
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.
This is a normal operation.
x Alarms
Output AC Over
Voltage
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.
Contact Technical Support for
assistance.
x Alarms
Output AC Under
Voltage
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.
Contact Technical Support for
assistance.
x Alarms
Output Overload
The current load exceeds 100% of the
maximum capacity available that this
UPS will support in Nonredundant
mode. The UPS issues an alarm, but
does not take any other action for this
level of overload.
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.
x Alarms
Program
Checksum Fail
The UPS detects that the Module Flash
Program Space is corrupt. This is
usually caused by a Flash Upgrade
Failure.
This only occurs during product
upgrade.
Re-flash the failing electronics module
with the latest upgrade package.
continued
5-8 HP Uninterruptible Power System R12000 XR Models User Guide
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