HP PowerTrust A3589A Manual page 239

If the yellow caution light is flashing, do not proceed. Switching the UPS into
CAUTION
Bypass mode when the caution light is flashing may disrupt power to the
load. Call HP Service. If the yellow caution light is not flashing, continue.
2. While depressing the red button on the Service Bypass Unit, set the Service Bypass
switch to .
Bypass
A continuous alarm will sound indicating that the UPS is in Bypass mode.
3. Set the rear panel UPS/BATTERY switch to
4. Use a screwdriver to loosen the screw at the center of each captive thumbscrew on the
Battery Precharge Shorting Plate, then unscrew the thumbscrews and remove the
plate. See Figure 3-8.
5. Disconnect the Battery Box cable from the Electronics Unit.
6. Remove the bezel assembly and the four Torx screws that secure the Electronics Unit to
the rack.
7. Remove the old panel assembly by removing the four Torx screws that hold it to the
front of the Electronics Unit.
8. Disconnect the cable from the circuit board by grasping the red connector and gently
pulling it out from the 10-pin right-angle header on the side of the circuit board.
9. Install the replacement control panel.
a. Connect the cable to the circuit board. Refer to Figure D-6.
The number on the connector must match the number on the board.
Connect the cable to the circuit board by plugging the cable connector into the 10-pin
right-angle header on the side of the circuit board.
Be careful not to bend or break any of the header pins.
b. Attach the control panel to the front panel.
i. Align the holes in the housing flanges with the holes in the front panel of the
UPS. Secure with the four screws provided in the kit.
ii. Remove the protective clear plastic film that covers the label.
Appendix D
Removal and Replacement Procedures
. The alarm will turn off.
DISABLE
Field Replaceable Units
D-21