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Method 4 (External Test/Equalize) Procedure
In this method, a user (or external equipment) places the system in the test/equalize mode by applying an
external signal to the system. The system returns to the float mode when the external signal is removed. This
method overrides the other three methods.
Placing the System into Test/Equalize Mode: Apply an external test/equalize loop closure to the system's
remote equalize terminals.
Returning to Float Mode: Remove the external test/equalize loop closure from the system's remote equalize
terminals.
NOTE!
If a manual test/equalize, manually initiated timed test/equalize ,or automatic equalize is in
process; it is canceled and the system returns to float mode when system ground is removed from the
test/equalize terminal.
Setting MCA Audible Alarm Cutoff Reset Time Period
An audible alarm device is located on the MCA Control Panel. This alarm sounds when any alarm condition
monitored by the MCA occurs. The alarm can be manually silenced (cut off) by pressing a local key. A local
indicator illuminates when the audible alarm has been cut off. The alarm remains silenced for the current alarm
condition only. If another alarm condition occurs, the audible alarm again sounds.
A programmable audible alarm cutoff reset feature is provided. Once an audible alarm has been cut off, it
automatically resets (and sounds if the alarm condition is still present) after the time period programmed
expires. If another alarm condition occurs, the audible alarm again sounds.
The MCA Audible Alarm Cutoff Reset feature is active when an "AUDIBLE SILENT TIME = mm MINUTES" value
is selected.
The MCA Audible Alarm Cutoff Reset feature is inactive when "AUDIBLE ALARMS STAY SILENCED" is
selected.
Procedure
1.
With SYSTEM OK being displayed on the MCA Interface Pad, press and release the FUNCTION SET
ENTER key. The FUNCTION MENU is displayed.
or
In the MAIN ALARM MENU, repeatedly press and release the FUNCTION SELECT DOWN arrow key
until "GO TO FUNCTION MENU" is displayed. Press and release the FUNCTION SET ENTER key. The
FUNCTION MENU is displayed.
2.
Repeatedly press and release the FUNCTION SELECT DOWN arrow key until "CHANGE
CONFIGURATION PARAMETERS" is displayed. Press and release the FUNCTION SET ENTER key.
3.
"AUDIBLE SILENT TIME = mm MINUTES" or "AUDIBLE ALARMS STAY SILENCED" is displayed.
4.
Press and release the ALARM CUTOFF and FUNCTION SET ENTER keys simultaneously.
5.
Observe the value displayed. Press and hold the FUNCTION SET YES (+) or NO (-) key until the desired
value or "AUDIBLE ALARMS STAY SILENCED" is displayed. Release the key.
6.
With the desired value or "AUDIBLE ALARMS STAY SILENCED" being displayed, press and release the
FUNCTION SET ENTER key.
7.
"ARE YOU SURE?" is displayed. Press and release the FUNCTION SET YES (+) key.
Vertiv™
| NetSure™ 802 Series -48 VDC Power System User Manual (Section 5877) | Rev. V
108
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