SC300 Handbook
122
Copyright © 2007-2018 Eaton Corporation. All Rights Reserved.
IPN 997-00012-03 B2 Issue B2 July 2018
Troubleshooting
Use the table to troubleshoot minor installation and operational problems. For additional
assistance see contact details on page 153. Return items for replacement or repair with a
completed Equipment Incident Report on page 150.
Problem
Possible Cause
Required Action
SC300 displays a dc power
system alarm message.
See Alarm Descriptions on page
SC300 LCD is blank and
green Power On LED is off.
RXP/power cable is
disconnected from the SC300.
Connect cable from connector YS11 to the
dc power system voltage feed module
(see Connections on page
). Wait for
start-up to complete.
The ac supply is off and the
batteries are not connected
because the Low Voltage
Disconnect (LVD) has
disconnected.
None. The power system including the
SC300 will return to normal operation
when the ac supply is within its specified
voltage range.
Faulty Voltage Feed Module
(VFM) or faulty SC300.
Replace faulty unit.
SC300 LCD is blank and
green Power On LED is on.
SC300 is in start-up mode
Wait for start-up to complete. See
Starting the SC300 on page
Faulty SC300
Replace faulty SC300.
SC300 Red LED or Yellow
LED is on.
An alarm is active.
Check the type of alarm on the LCD or
with
Web
or
PowerManagerII
. See Alarm
Descriptions on page
Unable to change settings
from SC300 keypad.
Keypad access is set to
Read
Only
or
PIN Protected
.
See Keypad Access Security on page
Rectifier does not shutdown
when LBRS is enabled.
Load Based Rectifier Shutdown
is not available with APR48-3G
(prior to PR5), EPR48-3G,
APR24-3G and CR48-3G
rectifiers.
See Load Based Rectifier Shutdown on
page
44
.
Monitor OK relay (RY6) is
de-energized.
An active alarm, digital input or
analog input is mapped to this
relay.
Check relay mapping. See Digital
Outputs on page
Problem with power or
communications to I/O board.
Check all connections (see Connections
on page
SC300 or I/O board software
corrupt or hardware fault.
Replace faulty unit.
Incorrect battery or load
current readings.
Bus voltage sense polarity is
incorrect.
Check the bus voltage sense polarity and
correct if necessary.
Incorrectly configured shunt
inputs.
Check shunt mapping and gain is correct.
Current is within the
Battery
State Threshold
. See details on
page
None, normal operation.
