Vertiv NetSure-48 VDC Installation And User Manual page 29

d) Requirement: All external alarms deactivate.
Checking System Over Voltage Alarm 1 and Over 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 "Over Voltage 1". Main Menu / Settings Icon / Other Settings / Over
Voltage 1. Record the displayed voltage setpoint.
6. Press the Enter (ENT) key; then use the UP or DOWN keys to adjust the "Over Voltage 1" value to below the system voltage
recorded in step 3. Press ENT.
a) Requirement: An audible alarm sounds. The alarm will be silenced in Requirement c.
b) Requirement: NCU "Critical/Major" alarm indicator goes from off to red.
Requirement: Press ESC repeatedly to return to the Main Menu. NCU displays "Alarm".
c)
To see the specific alarm(s), navigate to the Alarm Menu and press ENT. The Active Alarm screen lists one critical
alarm. "Power System Over Voltage 1 Critical" is displayed.
d) Requirement: External "DC Over Voltage 1" (Relay 3) and "Critical" (Relay 1) alarms activate.
7. Without readjusting the "Over Voltage 1" setpoint, navigate to "Over Voltage 2". Main Menu / Settings Icon / Other Settings /
Over Voltage 2. Record the displayed voltage setpoint.
8. Press the Enter (ENT) key; then use the UP or DOWN keys to adjust the "Over Voltage 2" value to below the system voltage
recorded in step 3. Press ENT.
a) Requirement: An audible alarm sounds. Alarm will be silenced in Requirement d.
Requirement: NCU "Critical/Major" alarm indicator stays red.
b)
c) Requirement: Press ESC repeatedly to return to the Main Menu. 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 Over Voltage 2 Critical" is displayed. Use arrow keys to scroll through the list of alarms.
"Power System Over Voltage 1 Critical" is displayed.
d) Requirement: External "DC Over Voltage 1" (Relay 3) alarm and "Critical" (Relay 1) alarm remain active.
9. Navigate to "Over Voltage 2". Main Menu / Settings Icon / Other Settings / Over Voltage 2.
10. Press ENT; then use the UP or DOWN keys to adjust the "Over Voltage 2" setting to the value recorded in step 7. Press ENT.
NOTE!
Over Voltage 2 alarm will retire. The audible alarm will be silenced in the next step.
Use the UP or DOWN keys to scroll up to "Over Voltage 1".
11.
12. Press ENT; then use the UP or DOWN keys to adjust the "Over Voltage 1" setting to the value recorded in step 5. Press ENT.
Vertiv™ NetSure™ -48 VDC Bulk Output Rectifier System Installation and User Manual
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