Vertiv
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NetSure 502NGFB Installation Manual (Section 6009)
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Rev. Z
63
To see the specific alarm(s), navigate to the Alarm Menu and press ENT. The Active Alarm screen
lists one critical alarm. “Power System Under Voltage 1 Critical” is displayed.
d)
Requirement:
External “DC Under Voltage 1” (Relay 4) and “Critical” (Relay 1) alarms activate.
7.
Without readjusting the “Under Voltage 1” setpoint, navigate to “Under Voltage 2”. Main Menu / Settings
Icon / Other Settings / Under Voltage 2. Record the displayed voltage setpoint.
8.
Press the Enter (ENT) key; then use the UP or DOWN keys to adjust the “Under Voltage 2” value above
the system voltage recorded in step 3. Press ENT.
a)
Requirement:
An audible alarm sounds. Alarm will be silenced in Requirement c.
b)
Requirement:
NCU “Critical/Major” alarm indicator stays red.
c)
Requirement:
Press ESC repeatedly to return to the Main screen. NCU displays “Alarm”.
To see the specific alarm(s), navigate to the Alarm Menu and press ENT. The Active Alarm screen
lists two critical alarms. “Power System Under Voltage 2 Critical” is displayed. Use arrow keys to
scroll through the list of alarms. “Power System Under Voltage 1 Critical” is displayed.
d)
Requirement:
External “DC Under Voltage 2” (Relay 5) alarm activates, “DC Under Voltage 1” (Relay
4) alarm resets, and “Critical” (Relay 1) alarm remains active.
9.
Navigate to “Under Voltage 2”.
10.
Press ENT; then use the UP or DOWN keys to adjust the “Under Voltage 2” setting to the value recorded
in step 7. Press ENT.
NOTE!
Low Voltage 2 alarm will retire. The audible alarm will be silenced in the next step.
11.
Use the UP or DOWN keys to scroll up to “Under Voltage 1”.
12.
Press ENT; then use the UP or DOWN keys to adjust the “Under Voltage 1” setting to the value recorded
in step 5. Press ENT.
a)
Requirement:
NCU “Critical/Major” alarm indicator goes from red to off.
b)
Requirement:
Press ESC repeatedly to return to the Main screen. NCU displays “No Alarm”.
c)
Requirement:
All external alarms deactivate.
Checking Circuit Breaker/Fuse Alarm
NOTE!
For all shelves equipped with battery disconnect circuit breakers, an open battery disconnect
circuit breaker will not activate the fuse/circuit breaker alarm unless a battery (or a temporary test load)
is connected to the system battery terminals.
Procedure
1.
Verify system is operating and no alarms are present.
2.
Verify the NCU displays the Main screen. If not, press ESC repeatedly to return to the Main screen.
3.
Open the front door of the Distribution Unit at the right-hand side of the shelf.
