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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 59
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Table 4
Full Alarm Name - WEB
(Abbreviated
Alarm Name - LCD)
Alarm Description
Action to Correct
Mains Failure
(Mains Failure)
Commercial AC power failure.
Check why no commercial AC power.
OB AC Unit (OB-AC Module must be present in system)
(OBAC)
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.
Mains Failure
(Mains Failure)
Commercial AC power failure.
Check why no commercial AC power.
Severe Mains Failure
(SevereMainsFail)
Commercial AC power voltage is too
low.
Check why voltage is low.
Mains Failure (Single)
(Mains Failure)
Commercial AC power failure.
Check why no commercial AC power.
Severe Mains Failure (Single)
(SevereMainsFail)
Commercial AC power voltage is too
low.
Check why voltage is low.