HP Tower Uninterruptible Power System - Manual (Page 55)

Troubleshooting 55
b. If the Battery Fault LED is red, replace the batteries (" UPS battery replacement procedure " on
page 46 ).
3. Reduce the load:
a. Power down the UPS (" Powering down the UPS " on page 42 ).
b. Remove one or more load devices to reduce the power requirements.
c. Wait at least 5 seconds and restart the UPS.
d. If the condition persists, verify that the load devices are not defective.
4. Allow the UPS to cool:
a. Power down the UPS (" Powering down the UPS " on page 42 ).
b. Clear vents and remove any heat sources.
c. Verify that the airflow around the UPS is not restricted.
5. Wait at least 5 minutes and restart the UPS.
6. 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.
Bypass out of range is only a status and does not keep the UPS from transferring to Auto-Bypass mode (on
page
39 ).
Action:
1. Check the input voltage and reconfigure the UPS (" Configuring the UPS " on page 40 ).
2. Contact a qualified electrician to verify that the utility power is suitable for the UPS.
Battery condition
Action:
1. Install the battery module. If the battery module is already installed, remove and reinsert the module.
2. Allow the UPS batteries to charge for 24 hours.
3. If the LED does not turn off, replace the batteries (" UPS battery replacement procedure " on page 46 ).
4. If the condition persists, contact an HP authorized service representative.
UPS is on battery
Action:
1. Save files and shut down connected equipment.
2. Allow the UPS batteries to charge for 24 hours.