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Troubleshooting 60
Checksum failure error
A Checksum failure error occurs when executing a bad load sequence, or having an incorrect EEPROM map
while loading software through the serial or USB port.
Action:
1. Rerun the firmware upgrade.
2. If the condition persists, contact an HP authorized service representative.
UPS does not start
Action:
1. Be sure that the power cord is plugged in to a utility power receptacle.
2. Check the power source at the utility power receptacle.
Low battery shutdowns
Ungraceful shutdown of attached servers occurs when the UPS is in a low battery condition.
Action:
1. Verify that the power management software is not delaying the shutdown of attached servers when the
UPS is in a low battery condition.
2. Allow the UPS batteries to charge for 24 hours.
3. If the Battery Fault LED is red, replace the batteries ("UPS battery replacement procedure" on page 47).
UPS does not provide the expected backup time
Action:
1. If the Overload LED ("UPS front panel controls" on page 8) is illuminated, remove one or more load
devices to reduce the power requirements.
2. Power down the UPS ("Powering down the UPS" on page 44).
3. Allow the UPS batteries to charge for 24 hours.
4. Initiate a self-test ("Initiating a self-test" on page 43).
5. During extended power outages, save your work, power down the load devices, and then power down
the UPS ("Powering down the UPS" on page 44) to conserve battery power.
UPS frequently switches between utility and battery
power
Action:
1. Check the input voltage and reconfigure the UPS ("Configuring the UPS" on page 42).
2. Contact a qualified electrician to verify that the utility power is suitable for the UPS.