Eaton DV2-A10B, Installation And Operation Manual

Page: 59 / 95

Maintenance
Copyright © 2011 Eaton Corporation. All Rights Reserved.
IPN 997-00012-82B May 2011
53
Problem Possible Cause Required Action
String Fail Alarm The Battery Mid-point
Monitoring system has detected
a voltage imbalance in one of
the battery strings. See Battery Mid-point Monitoring on
page
59 .
A Battery Mid-point Monitoring
sense wire is disconnected. Check the sense wires.
I/O board Power/Comms
OK LED is off I/O board is not powered or
faulty. Check connection to YH3 on I/O board.
See Connections on page
6 .
Replace I/O board if faulty.
I/O board Power/Comms
OK LED is flashing. I/O board is responding to an
Identify command from the
SC200.
None, this is normal operation. See
details in the System Controller
Operation Handbook.
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-energized. None, this is normal operation.
LVD Status LED(s) 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. See
Connections on page
6 .
LVD Type setting is incorrect. Check LVD Type setting.
LVD contactor(s) not
operating. LVD settings incorrect. Check LVD is enabled and set to correct
values. See details in the System
Controller Operation Handbook.
Check that the LVD manual control is set
to AUTO. See details in the System
Controller Operation Handbook.
Check that the contactor is correctly
configured and mapped to the I/O
board. See details in the System
Controller Operation Handbook.
Contactor is disconnected. Check the control and dc power cables
are connected. See details on page
6 .
All other SC200 problems. See Troubleshooting in the SC200
Operation Handbook.