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UM1M820BNA User Instructions
Issue AH, March 4, 2013 Spec No. 1M820BNA (Model M820B)
Spec No. 1M820DNA (Model M820D)
58 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
Line CA Over Voltage 1
(L-CA Over Volt1)
Voltage between Line C and Line A is
higher than the High Line Voltage CA
Alarm threshold.
Check why voltage is high.
Line CA Over Voltage 2
(L-CA Over Volt2)
Voltage between Line C and Line A is
higher than the Very High Line Voltage
CA Alarm threshold.
Line CA Under Voltage 1
(L-CA UnderVolt1)
Voltage between Line C and Line A is
lower than the Low Line Voltage CA
Alarm threshold.
Check why voltage is low.
Line CA Under Voltage 2
(L-CA UnderVolt2)
Voltage between Line C and Line A is
lower than the Very Low Line Voltage
CA Alarm threshold.
Phase A Over Voltage 1
(PH-A Over Volt1)
Phase A voltage is above over voltage
1 threshold.
Check why voltage is high.
Phase A Over Voltage 2
(PH-A Over Volt2)
Phase A voltage is above over voltage
2 threshold.
Phase A Under Voltage 1
(PH-A UnderVolt1)
Phase A voltage is below under
voltage 1 threshold.
Check why voltage is low.
Phase A Under Voltage 2
(PH-A UnderVolt2)
Phase A voltage is below under
voltage 2 threshold.
Phase B Over Voltage 1
(PH-B Over Volt1)
Phase B voltage is above over voltage
1 threshold.
Check why voltage is high.
Phase B Over Voltage 2
(PH-B Over Volt2)
Phase B voltage is above over voltage
2 threshold.
Phase B Under Voltage 1
(PH-B UnderVolt1)
Phase B voltage is below under
voltage 1 threshold.
Check why voltage is low.
Phase B Under Voltage 2
(PH-B UnderVolt2)
Phase B voltage is below under
voltage 2 threshold.
Phase C Over Voltage 1
(PH-C Over Volt1)
Phase C voltage is above over voltage
1 threshold.
Check why voltage is high.
Phase C Over Voltage 2
(PH-C Over Volt2)
Phase C voltage is above over voltage
2 threshold.
Phase C Under Voltage 1
(PH-C UnderVolt1)
Phase C voltage is below under
voltage 1 threshold.
Check why voltage is low.
Phase C Under Voltage 2
(PH-C UnderVolt2)
Phase C voltage is below under
voltage 2 threshold.