Vertiv | NetSure™ 8200 Series -48 VDC Power System Installation Manual (IM582140000) | Rev. A
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.
b) Requirement: NCU “Critical/Major” alarm indicator goes from off to red.
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 one critical alarm. “Power System Over Voltage 1 Critical” is displayed.
d) Requirement: External alarms activate (if configured). Refer to the NCU configuration drawing
(C-drawing) furnished with your system.
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.
b) Requirement: NCU “Critical/Major” alarm indicator stays red.
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 alarms activate (if configured). Refer to the NCU configuration drawing
(C-drawing) furnished with your system.
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.
11. Use the UP or DOWN keys to scroll up to “Over Voltage 1”.
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.
a) Requirement: NCU “Critical/Major” alarm indicator goes from red to off.