Vertiv
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+24 VDC Power System User Manual (Section 6013)
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Rev. G
84
Adjusting System 50% Battery On
Discharge (Very Low Voltage) Alarm
Local MCA Control Panel Adjustment Procedure
1.
All controls are located on the MCA Interface Pad. Refer to
2.
With "SYSTEM OK" being displayed on the MCA Interface Pad, press and release the FUNCTION SET
ENTER pushbutton.
or
With "## ALARMS ACTIVE" being displayed on the MCA Interface Pad, press and release the
FUNCTION SET ENTER pushbutton. Repeatedly press and release the FUNCTION SELECT DOWN
arrow pushbutton until "FUNCTION MENU" is displayed. Press and release the FUNCTION SET ENTER
pushbutton.
3.
Repeatedly press and release the FUNCTION SELECT DOWN arrow pushbutton until "ADJUSTMENT
MENU" is displayed.
4.
Press and release the FUNCTION SET ENTER pushbutton.
5.
Press and release the FUNCTION SELECT DOWN arrow pushbutton to display "ADJUST ALARMS".
6.
Press and release the FUNCTION SET ENTER pushbutton.
7.
Repeatedly press and release the FUNCTION SELECT DOWN arrow pushbutton until "SYS 50% =
##.##V (VERYLOVOLT = ##.##V)" is displayed.
8.
Press and release the ALARM CUTOFF and FUNCTION SET ENTER pushbuttons simultaneously. The
"SYS 50% = (VERYLOVOLT =)" portion of the display flashes.
9.
Observe the value displayed. This is the 50% battery on discharge (very low voltage) alarm setting. To
change this value, press and hold the FUNCTION SET YES (+) or NO (-) pushbutton. Release the
pushbutton when the desired value is displayed.
10.
With the desired 50% battery on discharge (very low voltage) alarm value being displayed, press and
release the FUNCTION SET ENTER pushbutton.
11.
“ARE YOU SURE? + -” is displayed. Press and release the FUNCTION SET YES (+) pushbutton. The
display stops flashing.
NOTE!
The 50% battery on discharge (very low voltage) alarm value will not be changed and the
adjustment mode will be exited if the FUNCTION SET YES (+) pushbutton is not pressed within 10
seconds of the “ARE YOU SURE? +
-” prompt.
12.
Press and release the FUNCTION SET YES (+) and NO (-) pushbuttons simultaneously, to return to the
beginning of the MCA menu tree.