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User Instructions UM1M820BNA
Spec No. 1M820BNA (Model M820B) Issue AH, March 4, 2013
Spec No. 1M820DNA (Model M820D)
Chapter 2. Operation 43
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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
High Load Level1
(HighLoadLevel1)
Load current above high level 1.
Check to see why load current is high.
High Load Level2
(HighLoadLevel2)
Load current above high level 2.
Load Current Alarm
(Load Curr Alarm)
Load current alarm active.
Check to see why load current alarm is
active.
Rectifier Group Alarms
(Rect Group)
Multiple Rectifiers Failure
(Multi-Rect Fail)
More than one rectifier has failed.
Check input voltage to rectifiers.
Replace rectifiers.
Rectifier Lost
(Rectifier Lost)
A rectifier cannot be detected by the
Controller.
Reset the Rectifier Lost alarm.
Replace defective rectifier.
ECO Active
(ECO Active)
Rectifier Energy Optimization Mode is
enabled.
Check to see why system was placed
into this mode.
All Rectifiers Comm Fail
(AllRectCommFail)
No response from all rectifiers.
Check the connectors and cables or
the CAN loop. Replace the Controller.
ECO Cycle Alarm
(ECO Cycle Alarm)
If Energy Optimization Mode is
enabled and the Controller oscillates
in and out of Energy Optimization
more than 5 times, this alarm is
generated.
Check for other alarms.
Reset this alarm.
Rectifier Alarms
(Rectifier)
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.
HVSD
(HVSD)
A rectifier has an overvoltage
condition.
Rectifier Protected
(Rect Protected)
A rectifier is in protected mode.
Fan Failure
(Fan Failure)
A rectifier’s fan has failed.
Replace fan.