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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 67
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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
Mains 1Uab/Ua Under
Voltage
(M1Uab/Ua UnderV)
AC input 1 voltage between Line A
and Line B below under voltage
threshold.
--
Mains 1Ubc/Ub Under
Voltage
(M1Ubc/Ub UnderV)
AC input 1 voltage between Line B
and Line C below under voltage
threshold.
--
Mains 1Uca/Uc Under
Voltage
(M1Uca/Uc UnderV)
AC input 1 voltage between Line C
and Line A below under voltage
threshold.
--
Mains 2Uab/Ua Under
Voltage
(M2Uab/Ua UnderV)
AC input 2 voltage between Line A
and Line B below under voltage
threshold.
--
Mains 2Ubc/Ub Under
Voltage
(M2Ubc/Ub UnderV)
AC input 2 voltage between Line B
and Line C below under voltage
threshold.
--
Mains 2Uca/Uc Under
Voltage
(M2Uca/Uc UnderV)
AC input 2 voltage between Line C
and Line A below under voltage
threshold.
--
Mains 3Uab/Ua Under
Voltage
(M3Uab/Ua UnderV)
AC input 3 voltage between Line A
and Line B below under voltage
threshold.
--
Mains 3Ubc/Ub Under
Voltage
(M3Ubc/Ub UnderV)
AC input 3 voltage between Line B
and Line C below under voltage
threshold.
--
Mains 3Uca/Uc Under
Voltage
(M3Uca/Uc UnderV)
AC input 3 voltage between Line C
and Line A below under voltage
threshold.
--
AC Input MCCB Trip
(Input MCCB Trip)
Main input circuit breaker open.
--
AC Output MCCB Trip
(OutputMCCB Trip)
Main output circuit breaker open.
--
SPD Trip
(SPD Trip)
Surge protection device tripped.
--
Communication Fail
(Comm Fail)
AC distribution monitoring device has
lost communications with the
Controller.
Check communications cables.