HP Tower Uninterruptible Power System - Manual (Page 58)

Troubleshooting 58
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 42 ) 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 40 ).
2. Contact a qualified electrician to verify that the utility power is suitable for the UPS.