HP Tower Uninterruptible Power System - Manual (Page 42)

UPS operations 42
For information on what to do if the self-test detects a problem, see "Troubleshooting (on page 52 )."
Silencing an audible alarm
To silence an alarm, press the Test/Alarm Reset button (" UPS front panel controls " on page 8 ).
IMPORTANT:
• Although the audible alarm silences, the condition that caused the alarm to sound may still
exist.
• If a utility power failure caused the alarm, the alarm silences after power is restored.
For information about audible alarm conditions, see "LED and audible alarm troubleshooting (" LED
troubleshooting " on page 52 )."
Verifying the REPO port connection
NOTE: While testing, operate connected equipment in a safe test mode so the effects do not
disrupt critical operations.
After connecting the REPO port (on page 21 ):
1. Initiate a REPO by closing the REPO contact.
The Self Test, Battery Fault, Site Wiring Fault, Overtemperature, Overload, and Utility LEDs flash.
CAUTION: If the polarity is reversed while connecting the REPO port, the UPS powers up
normally.
2. Verify proper connection of the REPO port:
a. Power up the UPS (" Starting power to the load " on page 26 ).
b. Disconnect the REPO port.
c. Reconnect the REPO port.
If the polarity is correct, the REPO connectors can be disconnected, and then reconnected,
without initiating a REPO.
d. Verify that the UPS remains in Operate mode (on page 38 ).
e. If a REPO is initiated, the polarity is reversed. Check and correct the connections.
Powering down the UPS
1. Shut down all load devices.
2. Press the Off button to take the UPS out of Operate mode. Power to the load receptacles ceases.
The On Battery LED and Load Level indicator flash.
3. Disconnect the UPS from utility power.
4. Wait at least 60 seconds for the UPS internal circuitry to discharge.