Alarm Descriptions
Copyright © 2007-2018 Eaton Corporation. All Rights Reserved.
IPN 997-00012-03 B2 Issue B2 July 2018
135
Peak Load Reduction
The system is running in PLR mode, with the rectifiers turned down and the load
being supplied from the batteries. For more details, see Peak Load Reduction on
page 36.
Rectifier Comms Lost
Normally this alarm indicates that a rectifier has been removed during routine
maintenance. However, faulty rectifier communications or losing the rectifier
communications bus can also trigger this alarm. If removing multiple rectifiers
triggers this alarm, reset it from the keypad before it triggers an external alarm.
Inhibited by:
Multiple Rectifier Comms Lost
. See details of Alarm Inhibiting on page
Rectifier Current Limit
Rectifier(s) in current limit.
Rectifier Fail
A rectifier is faulty or its ac supply has failed without causing partial or total ac
supply failure.
Inhibited by:
Multiple Rectifier Fail
,
AC Fail
and
Partial AC Fail
(if no rectifiers have
failed while still detecting the AC supply). See details of Alarm Inhibiting on page
Rectifier No Load
The total rectifier current is less than 2% of the maximum system output current or is
less than 2A.
Inhibited by:
AC Fail
. See details of Alarm Inhibiting on page
Rectifier OverTemperature
Rectifier(s) operating in temperature turndown mode, because of high ambient
temperature or low ac supply voltage.
Sensor Fail
The current, temperature or voltage sensing system is faulty, or the I/O board
mapping is incorrect.
Site Backup Time
Remaining
The power system has been running in AC fail from batteries for more than the time
specified by
Site Backup Time.
Solar Fail
At least one solar charger has failed.
Standby Mode
The SC300 is on but inactive. Another system controller controls the dc power
system. If the other system controller fails or is disconnected then the SC300 in
Standby Mode will become active (after a short delay).
String Fail
There is a voltage imbalance in one of the battery strings. See Battery Mid-point
Monitoring on page
System Overload
The power system is operating close to its maximum capacity and more rectifiers are
needed. The System Overload threshold is configurable. See System Overload Alarm
on page
Inhibited by:
AC Fail
. See details of Alarm Inhibiting on page
System Overload B
This is identical to
System Overload.
This alarm is enabled when another system
overload alarm is needed with different settings.
Unknown Hardware
The SC300 has detected an unknown type of device on the RXP bus. Contact your
Eaton DC product supplier for advice.
Unmapped IOB Found
An I/O board or SiteSure-3G module is connected to the SC300, but its serial number
is not in the
I/O Board to Serial Number Mapping
table. See I/O Board Mapping on
Wrong Battery Polarity
An analog input with
Function
set to "Reverse Battery Detect" has a value above the
Bus Voltage
.
This alarm indicates the battery is connected with wrong polarity. See Reverse
Battery Detection on page 77.
