Vertiv
|
+24 VDC Power System User Manual (Section 6013)
|
Rev. G
160
Quad Low Voltage Disconnect Circuit Card Replacement
as this procedure is performed.
CAUTION!
When performing any step in this procedure that requires removal or installation of
hardware, use caution to ensure no hardware is dropped and left inside the cabinet; otherwise service
interruption or equipment damage may occur.
WARNING!
Circuit cards used in this equipment contain static-sensitive devices. Read the Static
Warning page at the front of this document before performing the following procedure.
NOTE!
When performing any step in this procedure that requires removal of existing hardware, retain all
hardware for use in subsequent steps.
Procedure
1.
Observe the admonishments presented at the beginning of this section, and those encountered in this
procedure.
2.
Performing this procedure may activate external alarms. Do one of the following. If possible, disable
these alarms. If these alarms cannot be easily disabled, notify the appropriate personnel to disregard
any future alarms associated with this system.
3.
Open the Distribution Cabinet's front door by turning and holding the captive fastener in the
counterclockwise position.
4.
Remove the clear plastic panel that covers the circuit cards at the bottom of the cabinet. To do so,
loosen but do not remove the two screws that secure the cover. Slide the cover to the front until the
screw heads clear the keyhole slots in the cover. Then lift the cover out of the cabinet.
WARNING!
Performing the next step inhibits the operation of the low voltage disconnect circuit, and
prevents disconnection of battery and system output from the controlled load(s) if a low battery voltage
condition occurs.
5.
Place the low voltage disconnect NOR/INH switch to the INH position. This switch is located on
Interconnect/LVD Inhibit Circuit Card A1. Refer to
for circuit card and switch location. The
low voltage disconnect INHIBIT indicator will illuminate. This step prevents accidental disconnection of
battery and system output from the controlled load(s) while performing this procedure.
6.
Remove fuses D (F4) and E (F5) from the fuseholders located on Interconnect/LVD Inhibit Circuit Card
A1. Refer to
for circuit card and fuse location.
WARNING!
Damage to the circuit card may result if the next step is not followed.
7.
Connect an approved grounding strap to your wrist. Attach the other end to a suitable ground.
DANGER!
Performing the next steps exposes service personnel to battery potential. Exercise extreme
caution not to inadvertently contact or have any tool inadvertently contact any energized electrical
termination.
8.
Remove the two screws that secure the front edge of the circuit card. Pull the circuit card forward out of
the edge connector at the back of the card, and remove from the cabinet.
