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NetSure™ 2100 Series -48 VDC Power System Installation Manual (IM582138000)
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Rev. C
84
2.
Verify the Mini Control Unit displays the Main Menu. If not, press ESC repeatedly to return to the Main
Menu.
3.
Open the front door of the distribution unit at the right-hand side of the shelf.
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 (black handle). Electrical trip alarm circuit breakers
(white handle) cannot be easily tested in the field.
4.
Do one of the following: (1) Remove a good fuse or a dummy fuse from a GMT fuse position, and replace
it with a blown fuse, or (2) Place the handle (if black) of a load circuit breaker in the OFF (open) position.
a)
Requirement:
An audible alarm sounds. The alarm will be silenced in Requirement c.
b)
Requirement:
Mini Control Unit “Critical/Major” alarm indicator goes from off to red.
c)
Requirement:
Mini Control Unit 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.
d)
Requirement:
External “Fuse/Circuit Breaker Alarm” (Relay 7) and “Critical” (Relay 1) alarms
activate.
5.
Do one of the following: (1) Replace the blown GMT fuse with a known good fuse (or a dummy fuse), or
(2) place the handle of the circuit breaker in the ON (closed) position.
a)
Requirement:
Mini Control Unit “Critical/Major” alarm indicator goes from red to off.
b)
Requirement:
Press ESC repeatedly to return to the Main screen. Mini Control Unit displays “
No
Alarm
”.
c)
Requirement:
All external alarms deactivate.
