HP Tower Uninterruptible Power System - Manual (Page 48)

Maintenance 48
2. Power down the UPS (" Powering down the UPS " on page 42 ).
3. Switch the circuit breaker for any attached ERMs to the Off position.
4. Unplug the UPS power cord.
5. Disconnect the communications cable from the option card.
6. Disconnect the ground bonding cable.
7. Disconnect the REPO port.
8. Unplug the load devices.
9. Unplug the ERM connected to the UPS.
10. Remove the UPS front bezel (" Removing the UPS front bezel " on page 43 ).
11. Disconnect the battery leads.
12. Remove the UPS battery bracket.
13. Remove the UPS battery modules.
14. Remove the screws securing the UPS to the rack.
15. Remove the UPS from the rack.
To replace the component, reverse the removal procedure.
Replacing the ERM
To remove the ERM:
1. Switch the circuit breaker for any attached ERMs to the Off position.
2. Unplug the ERM from the back of the UPS.
3. Unplug the ERM from a second connected ERM.
4. Remove the front bezel (" Removing the ERM front bezel " on page 43 ) on the ERM that is being
replaced.
5. Disconnect the battery leads.
6. Remove the screws securing the ERM to the rack.
7. Remove the ERM from the rack.
To replace the component, reverse the removal procedure.
Updating the UPS firmware
To update the UPS firmware, see the HP website ( http://www.hp.com/go/rackandpower ).
Configuring a USB to serial converter
NOTE: This procedure was tested on the Windows ® XP Professional and Windows Server ®
2003 operating systems using the HP USB to serial converter (part number 304098-001).
Depending on your system configuration, a driver download might be required to successfully
install the converter. The driver can be downloaded from the USB-Drivers website
(
http://www.usb-drivers.com/drivers/123/123294.htm ).
To configure a USB port to the COM 1 port on systems that do not have available serial ports: