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Troubleshooting 46
Silencing an audible alarm
To silence an alarm, press any button on the front panel display to silence the alarm. If the alarm status
changes, the alarm beeps again, overriding the previous alarm silencing.
IMPORTANT:
• Although the audible alarm silences, the condition that caused the alarm to sound may still
exist.
• If a utility power failure caused the alarm, the alarm silences after power is restored.
For information about audible alarm conditions, see "Alarm troubleshooting (on page 44)."
Battery connection condition
Possible cause:
• The UPS does not recognize the internal batteries.
• Two or more battery trays are disconnected.
Action:
1. Be sure that all the battery trays are fully seated and locked in place.
2. If the condition persists, contact an HP authorized service representative.
Bypass is out of range
The input voltage is not within ±12 percent of nominal voltage.
The UPS is receiving utility power that might be unstable or in brownout conditions. The UPS continues to
supply power to the connected equipment. If conditions worsen, the UPS might switch to battery power.
Action:
1. Check the input voltage and reconfigure the UPS ("Configuring the UPS" on page 32).
2. Contact a qualified electrician to verify that the utility power is suitable for the UPS.
General alarm condition
Action:
1. If power management software is being used, check the log files to obtain specific error information to
help identify the problem.
For more information about the causes of a general alarm condition, see the HP Power Manager user
guide available for download from the HP website (http://www.hp.com/go/rackandpower).
2. Check the batteries:
a. Allow the UPS batteries to charge for 48 hours.
b. If a Battery Fault occurs, replace the batteries.
3. Reduce the load:
a. Power down the UPS ("Powering down the UPS" on page 34).
b. Remove one or more load devices to reduce the power requirements.