HP Parallel Uninterruptible Power System - Manual (Page 37)

UPS installation 37
Switching on the UPS input circuit breaker
1. Switch the UPS input circuit breaker on each UPS to the On position.
2. Wait for the front panel display on each UPS to illuminate.
The Alarm LED flashes on each UPS.
3. Check each UPS front panel display for active alarms or notices (other than "Batteries Disconnected").
Resolve any active alarms before continuing. For alarm troubleshooting, see "LED and audible alarm
troubleshooting (on page
94 )."
Switching on the UPS battery circuit breaker
When the UPS is plugged in and the battery circuit breaker is on, the UPS automatically enters Standby mode
and begins charging the batteries.