Vertiv NetSure-48 VDC Installation And User Manual page 30

Vertiv™ NetSure™ -48 VDC Bulk Output Rectifier System Installation and User Manual
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".
Requirement: All external alarms deactivate.
c)
Checking System Under Voltage Alarm 1 and Under Voltage Alarm 2
1. Verify system is operating and no alarms are present.
2. Verify the NCU displays the Main Menu. If not, press ESC repeatedly to return to the Main Menu.
3. Record the system voltage displayed on the NCU Main screen.
4. Navigate to the Settings Menu.
5. With the Settings Menu screen displayed, navigate to "Under Voltage 1". Main Menu / Settings Icon / Other Settings / Under
Voltage 1. Record the displayed voltage setpoint
6. Press the Enter (ENT) key; then use the UP or DOWN keys to adjust the "Under Voltage 1" value to above the system voltage
recorded in step 3. Press ENT.
Requirement: An audible alarm sounds. The alarm will be silenced in Requirement c.
a)
b) Requirement: NCU "Critical/Major" alarm indicator goes from off to 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 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 to 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.
Requirement: Press ESC repeatedly to return to the Main screen. NCU displays "Alarm".
c)
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.
Navigate to "Under Voltage 2".
9.
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.
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