Troubleshooting 58
• If the condition occurred while reconnecting a disconnected REPO port, then verify the polarity of the
REPO connector pins.
For more information about REPO ports, see "Connecting the REPO port (on page 20)."
Site wiring condition
Action: Contact a qualified electrician to be sure that:
• The line and neutral wires are not reversed in the wall outlet.
• A ground wire connection does not exist.
Overload condition
All the load LEDs are illuminated.
Action:
1. Power down the UPS ("Powering down the UPS" on page 44).
2. Remove one or more load devices to reduce the power requirements.
3. Wait at least 5 seconds and restart the UPS.
4. If the condition persists, verify that the load devices are not defective.
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 a Hewlett Packard Enterprise 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 illuminates, replace the batteries ("UPS battery replacement procedure" on page
47).