SC200 Handbook
104
Copyright © 2007-2011 Eaton Corporation. All Rights Reserved.
IPN 997-00012-50H November 2011
Problem
Possible Cause
Required Action
LVD contactor(s) not
operating.
LVD settings incorrect.
Check LVD is enabled and set to correct
values. See details on page
Check that the LVD manual control is set
to AUTO. See details on page
Check that the contactor is correctly
configured and mapped to the I/O
board. See details on page
Contactor is disconnected.
Check the control and dc power cables
are connected. See details on page
System has no dc output
(rectifiers are on).
Load fuse or disconnect device
open.
Check for open fuse or disconnect device.
LVD contactor has disconnected
the load.
Use
DCTools/Web to c
heck LVD is enabled
and set to correct values. (LVD status
LED on the I/O board is on when
contactor is energized.)
Check that the I/O board is connected
(Power LED is on).
Check that the LVD control and power
cables connections on page
Check the connections from the load bus
to the LVD.
System has no battery input Battery disconnect device or
fuse open.
Check for open battery disconnect device
or fuse.
LVD has disconnected the
battery because ac supply is off
and the battery is fully
discharged.
None. The battery will be automatically
reconnected when the ac supply is
restored.
LVD contactor is open.
Use
DCTools/Web to c
heck LVD is enabled
and set to correct values. (LVD status
LED on the I/O board is on when
contactor is energized.)
Check that the I/O board is connected
(Power LED is on).
Check that the LVD control and power
cables are connected. See Connections on
page
Check the connections from the battery
bus to the LVD.
Replacing the System Controller or I/O Board
The SC200 system controller or the I/O board can be replaced without switching off the dc
power system and disconnecting the equipment it powers.
The specific procedures depend on the system configuration. Refer to the dc power system
Installation and Operation Guide.
