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UM1M820BNA User Instructions
Issue AH, March 4, 2013 Spec No. 1M820BNA (Model M820B)
Spec No. 1M820DNA (Model M820D)
70 Chapter 2. Operation
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Systems, North America, Inc. Any copying, use, or disclosure of it without the written permission of Emerson Network Power, Energy Systems, North America, Inc. is strictly prohibited.
Table 4
Full Alarm Name - WEB
(Abbreviated
Alarm Name - LCD)
Alarm Description
Action to Correct
Group 2 [3, 4] Rectifier Alarms
(Group 2 [3, 4] Rect)
AC Input Failure
(AC Failure)
No AC input power to a rectifier.
Check why no AC input power
available.
Rect Temperature High
(Rect Temp High)
A rectifier has a high temperature
condition.
Check why temperature is high.
Rectifier Fault
(Rect Fault)
A rectifier has a fault condition.
Refer to Rectifier User Manual for
troubleshooting information.
Over Voltage
(Over Voltage)
A rectifier has an over voltage
condition.
Rectifier Protected
(Rect Protected)
A rectifier is in protected mode.
Fan Failure
(Fan Failure)
A rectifier’s fan has failed.
Replace fan.
Current Limit
(Current Limit)
A rectifier is in current limit.
Rectifier overload. The load is higher
than rectifier capacity. If the batteries
are being recharged, the alarm will
cease by itself when the battery
voltage has increased to the charging
level. If the system load is higher than
the rectifier capacity, the batteries will
discharge. If this is the reason, install
additional rectifiers. If one or more of
the rectifiers are defective, replace the
faulty rectifiers.
Rectifier Communication Fail
(Rect Comm Fail)
A rectifier has lost communications
with the Controller.
Check communications cables. Reset
the Communication Fail alarm.
Replace the rectifier.
Derated
(Derated)
A rectifier is in output power derating
mode.
Refer to Rectifier User Manual for
troubleshooting information.
Current Share Alarm
(CurrShare Alarm)
A rectifier has a current sharing alarm.
Low AC Voltage Protection
(Low AC Protect)
A rectifier is in under voltage
protection mode.
SMDUP Alarms (SM-DU+ Module must be present in system)
(SMDUP)
Communication Fail
(Comm Fail)
Communications failure.
Check communications cables.