SC300 Handbook
134
Copyright © 2007-2018 Eaton Corporation. All Rights Reserved.
IPN 997-00012-03 B2 Issue B2 July 2018
DC Input Fail
One or more solar chargers has no DC input voltage.
DO Manual
A digital output is set to manual control (control state is set to Active or Inactive). See
Digital Outputs on page 90.
Equalize
The Equalize control process is active. See Equalize on page 31.
Fast Charge
The Fast Charge control process is active. See Fast Charge on page 32.
Generator Fail
Generator Control is active but the SC300 has not detected that the ac supply is
present (rectifiers have not turned on) after the Generator Fail Alarm Recognition
Period.
High Float
The bus voltage is above its normal range (set by the High Float Threshold).
If High Float Tracking is enabled, the High Float threshold will increase when the bus voltage
increases due to temperature compensation. The threshold change will be the same as the bus
voltage change.
High Load
The bus voltage is higher than the safe range for the load and/or battery (set by the
High Load Threshold).
IOB Comms Lost
The SC300 has lost communication with a mapped I/O board or SiteSure-3G module.
Or, an input or output is mapped to an invalid I/O board or SiteSure-3G module. See
I/O Board Mapping on page 145.
In Discharge
Battery Charge State is Discharge (see details on page 68).
Load Fuse Fail
A load fuse has blown or a load disconnect device has operated (indicated by an
active digital input with Function "Load Fuse Fail").
Low Float
The bus voltage is below its normal range (set by the Low Float Threshold).
If Low Float Tracking is enabled, the Low Float threshold will decrease when the bus voltage
decreases due to temperature compensation. The threshold change will be the same as the bus
voltage change.
Low Load
The bus voltage is lower than the safe range for the load and/or battery (set by the
Low Load Threshold).
LVD Characterization Error
An LVD contactor must be characterized. See Low Voltage Disconnect on page 49.
LVD Disconnected
An LVD contactor has disconnected the battery or load. See Low Voltage Disconnect
on page 49.
LVD Fail
An LVD contactor is faulty or the control cable from the I/O board is disconnected.
See Low Voltage Disconnect on page 49.
LVD Manual
An LVD is set to MANUAL CONNECT or MANUAL DISCONNECT. See Low
Voltage Disconnect on page 49.
MOV Fail
One or more MOV cartridges have failed and must be replaced (indicated by an
active digital input with Function set to "MOV Fail").
Multiple Rectifier
Comms Lost
More than one rectifier has lost communications. See also Rectifier Comms Lost on
page 135.
Multiple Rectifier Fail
Multiple rectifiers are faulty or their ac supply has failed without causing partial or
total ac supply failure.
Inhibited by: AC Fail and Partial AC Fail (if no more than one rectifier has failed
while still detecting the AC supply). See details of Alarm Inhibiting on page 58.
Normal Charge
The DC power system is in normal float charging mode.
Partial AC Fail
A digital input with Function set to "Phase Fail" is active, or more than 20% of single-
phase rectifiers are reporting ac supply failure, or all 3-phase rectifiers are reporting
loss of the same phase.
Inhibited by: AC Fail. See details of Alarm Inhibiting on page 58.
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