Page 3-69
LVD contactor has discon-
nected the battery.
Use
DCTools 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.
Check the connections from the battery
bus to the LVD.
LVD Status LED(s) (on I/O
board) are on.
LVD contactor is energized.
None, this is normal operation.
LVD Status LED(s) are off
(I/O board Power On LED
is on).
LVD contactor is de-ener-
gized.
None, this is normal operation.
LVD Status LED(s) is
flashing.
The contactor is in the wrong
state. (SC200 internal state
does not match signal from
contactor auxiliary switch.)
Check the electrical and mechanical
operation of the contactor and auxiliary
switch.
Check all wiring and connectors.
LVD contactor(s) is
not operating.
LVD settings are incorrect.
Check that the LVD is enabled and set to
correct values.
Check that the LVD manual control is set
to AUTO.
Check that the contactor is correctly con-
figured and mapped to the I/O board.
Contactor is disconnected.
Check the control and DC power cables
are connected.
Table 8 - Troubleshooting issues and actions: SC200
Problem
Possible cause
Required action
SC200 displays a DC
power system alarm
message.
See “4.1.3 Grounding in the St. Louis Market
Area” on page 75
Table 7 - Troubleshooting issues and actions: LVD
Problem
Possible cause
Required action