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Vertiv
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NetSure 502NGFB Installation Manual (Section 6009)
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Rev. Z
74
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.
10.
Press ESC repeatedly to return to the Main Menu. Navigate to “Settings” (ENT) / ““Power System”
(ENT) / “General” (ENT) / “Under Voltage 2”.
11.
Press ENT; then use the UP or DOWN keys to adjust the “Under Voltage 2” setting to the value recorded
in step 8. Press ENT.
NOTE!
Low Voltage 2 alarm will retire. The audible alarm will be silenced in the next step.
12.
Use the UP or DOWN keys to scroll up to “Under Voltage 1”.
13.
Press ENT; then use the UP or DOWN keys to adjust the “Under Voltage 1” setting to the value recorded
in step 6. Press ENT.
a)
Requirement
: ACU+ “Critical/Major” alarm indicator goes from red to off.
b)
Requirement
: Press ESC repeatedly to return to the Main screen. ACU+ displays “No Alm”.
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 ACU+ 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.
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
: ACU+ “Critical/Major” alarm indicator goes from off to red.
c)
Requirement
: ACU+ displays “Alarm”.