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+24 VDC Power System User Manual (Section 6013)
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Rev. G
89
Adjusting Low Voltage Disconnect (If Installed) "Disconnect" Value
Local MCA Control Panel Adjustment Procedure
1.
All controls are located on the MCA Interface Pad, unless otherwise stated. Refer to
WARNING!
Performing the next step inhibits the operation of the low voltage disconnect circuit, and if a
load contactor is furnished, prevents disconnection of battery and system output from the controlled
load(s) if a low battery voltage condition occurs. Also, if low voltage disconnect battery contactor is
furnished, prevents disconnection of battery from the system if a low battery voltage condition occurs.
2.
Place the Nor/INH switch to the INH position. This switch is located inside the Distribution Cabinet.
The low voltage disconnect INHIBIT indicator illuminates. This prevents accidental disconnection of
battery and system output from the controlled load(s) if a load contactor is furnished and accidental
disconnection of battery from the system if a low voltage disconnect battery contactor is furnished while
performing this procedure.
3.
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.
4.
Repeatedly press and release the FUNCTION SELECT DOWN arrow pushbutton until "ADJUSTMENT
MENU" is displayed.
5.
Press and release the FUNCTION SET ENTER pushbutton.
6.
Repeatedly press and release the FUNCTION SELECT DOWN arrow pushbutton until "ADJUST LVD" is
displayed.
7.
Press and release the FUNCTION SET ENTER pushbutton.
8.
"LVD1A = ##.##V" is displayed (if installed). If you are adjusting the other low voltage disconnect
circuits, repeatedly press and release the FUNCTION SELECT DOWN arrow pushbutton until the
respective low voltage disconnect circuit name is displayed (LVD1B, LVD2A, LVD2B, LVD3A, or LVD3B).
9.
Press and release the ALARM CUTOFF and FUNCTION SET ENTER pushbuttons simultaneously.
Portion of the display flashes.
10.
Observe the value displayed. This is the low voltage disconnect setting for the circuit being adjusted.
To change this value, press and hold the FUNCTION SET YES (+) or NO (-) pushbutton. Release the
pushbutton when the desired value is displayed.
NOTE!
The low voltage disconnect circuit is prevented from being adjusted higher than 0.5V below the
reconnect voltage setting. If you attempt to do this, a WARNING message is displayed.
11.
With the desired low voltage disconnect value being displayed, press and release the FUNCTION SET
ENTER pushbutton.