HP PowerTrust A3589A Manual page 230

Field Replaceable Units
Removal and Replacement Procedures
To remove and replace the Service Bypass Unit:
1. Power-down the load.
2. Shut down the UPS:
a. Turn the Output On/Output Off switch to
The yellow Caution Light will blink.
b. Set the UPS/BATTERY switch to
c. Disconnect the unit from AC power.
3. Remove the Output Receptacle Cover (see
and unplug any attached cables.
4. Disconnect the RS-232 cable from the serial port.
5. Remove the four screws that hold the Service Bypass Unit to the rack.
The Service Bypass Unit sits on the Electronics Unit. If you have
WARNING
removed the Electronics Unit, however, be sure to hold the Service
Bypass Unit in place as you remove the screws that hold it to the
rack. Unsupported, the Service Bypass Unit will fall when the last
screw is removed.
6. Carefully, but firmly, pull on the Service Bypass Unit to disconnect it from the
Electronics Unit and remove it from the rack.
7. Check that the Service Bypass switch on the new UPS is set to
breakers are all off.
8. Slide the Service Bypass Unit onto the shelf of the Electronics Unit until the connector
at the back of the Electronics Unit is aligned with the connector on the Service Bypass
Unit.
9. Carefully push the Service Bypass Unit into the cabinet until the connectors are fully
engaged.
10.Secure the Service Bypass Unit to the rear cabinet frame with four screws.
11.Reconnect the cables to the output receptacles and reattach the Output Receptacle
Cover.
12.Reconnect the RS-232 cable to the serial port.
13.Reconnect AC power.
14.Turn on all circuit breakers.
15.Switch the UPS/BATTERY switch to
Wait for the green Enable LED to come on and the Caution LED should flash for about
five seconds then go out.
16.When the Caution LED stops flashing, go to step 17.
D-12
.
Output Off
.
DISABLE
in Figure 1-3) from the output receptacles
14
.
ENABLE
and that the
NORMAL
Appendix D