Vertiv
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+24 VDC Power System User Manual (Section 6013)
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Rev. G
173
List RD and RE Shunt POD Circuit Card Replacement
One Shunt POD Circuit Card (battery current monitoring) is located within the List RD and RE assembly, which
is located on the rear of the Distribution Cabinet. To replace this circuit card perform the following procedure.
as this procedure is performed.
WARNING!
Circuit cards used in this equipment contain static-sensitive devices. Read the Static
Warning page at the front of this manual 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.
Remove the rear cover of the List RD or RE assembly.
WARNING!
Damage to the circuit card may result if the next step is not followed.
4.
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.
5.
Unplug the wire harness from connector J1 on the circuit card.
6.
Remove the one screw that secures the circuit card. Carefully lift the circuit card from its mounting
posts, and remove.
7.
Set "Shunt Capacity Selection” and “Shunt POD Identification” Switches S1 and S2 on the replacement
circuit card to match the setting on the existing circuit card. You can refer to "Setting Wiring Options" in
the separate INSTALLATION INSTRUCTIONS (SECTION 6012) for details.
8.
Place the circuit card over its mounting posts and carefully press down at each post until fully seated.
Install and tighten the one mounting screw.
9.
Remove the grounding wrist strap.
10.
Reinstall the rear cover of the List RD or RE assembly.
11.
Enable the external alarms, or notify appropriate personnel that this procedure is finished.
12.
Ensure that there are no local or remote alarms active on the system.