Filter
Top Products
User Instructions UM1M820BNA
Spec No. 1M820BNA (Model M820B) Issue AH, March 4, 2013
Spec No. 1M820DNA (Model M820D)
Chapter 2. Operation 37
This document is property of Emerson Network Power, Energy Systems, North America, Inc. and contains confidential and proprietary information owned by Emerson Network Power, Energy
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
485 Communication Failure
(485 Comm Fail)
485 communications failure.
--
Minor Summary
(MN Summary)
Minor alarm summary (one or more
alarms designated as minor is active).
Check additional alarms.
Major Summary
(MJ Summary)
Major alarm summary (one or more
alarms designated as major is active).
Check additional alarms.
Critical Summary
(CR Summary)
Critical alarm summary (one or more
alarms designated as critical is active).
Check additional alarms.
Rectifier Group Lost
(Rect Group Lost)
A rectifier group cannot be detected by
the Controller.
Check communications cables.
Check additional alarms.
Over Voltage 1
(Over Voltage 1)
Output voltage is higher than the Over
Voltage 1 Alarm threshold.
Check to see why system voltage is
high. Check the alarm setting.
Over Voltage 2
(Over Voltage 2)
Output voltage is higher than the Over
Voltage 2 Alarm threshold.
Under Voltage 1
(Under Voltage 1)
Output voltage is lower than the Under
Voltage 1 Alarm threshold.
Check to see why system voltage is
low. If there is a mains failure, check if
some load could be switched off in
order to prolong the operating time of
the plant. If the system load is too high
related to rectifier capacity, install
additional rectifiers. If the batteries are
being recharged, the alarm will cease
by itself when battery voltage has
increased to the charging level.
Under Voltage 2
(Under Voltage 2)
Output voltage is lower than the Under
Voltage 2 Alarm threshold.
Over Voltage 1 (24V)
(24V Over Volt1)
Output voltage is higher than the Over
Voltage 1 Alarm threshold.
Check to see why system voltage is
high. Check the alarm setting.
Over Voltage 2 (24V)
(24V Over Volt2)
Output voltage is higher than the Over
Voltage 2 Alarm threshold.