Vertiv | NetSure™ 8200 Series -48 VDC Power System Installation Manual (IM582140000) | Rev. A
6. Perform steps 4) and 5) for each remaining distribution fuse module located in the system.
NOTE! The following procedure is to be used only with circuit breakers that provide an alarm indication
when manually placed to the OFF (open) position. Electrical trip alarm circuit breakers cannot be easily
tested in the field.
7. Place a distribution circuit breaker to the OFF position.
a) Requirement: An audible alarm sounds.
b) Requirement: The bay's "Bay Alarm" indicator goes red.
c) Requirement: The distribution panel's "CBA/FA" indicator goes red.
d) Requirement: NCU “Critical/Major” alarm indicator goes from off to red.
e) Requirement: NCU displays “Alarm”.
To see the specific alarm(s), navigate to the Alarm Menu and press ENT. The Active Alarm screen
lists one critical alarm. “Power System Load Fuse Brkr Critical” is displayed.
f) Requirement: External alarms activate (if configured). Refer to the NCU configuration drawing
(C-drawing) furnished with your system.
8. Place the circuit breaker back to the ON position.
a) Requirement: The bay's "Bay Alarm" indicator goes out.
b) Requirement: The distribution panel's "CBA/FA" indicator goes out.
c) Requirement: NCU “Critical/Major” alarm indicator goes from red to off.
d) Requirement: Press ESC repeatedly to return to the Main screen. NCU displays “No Alarm”.
e) Requirement: External alarms reset (if configured).
9. Perform steps 7) and 8) for each remaining distribution fuse module located in the system.
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