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9.4 Deleting Historical Alarms
You can clean the historical alarms on the LCD, as shown in Figure 9-7.
Figure 9-7 Deleting historical alarms
9.5 Handling Alarms
9.5.1 Mains Fault
Possible Causes
No AC power is supplied.
Measures
Check whether the input voltage of the AC input circuit breaker is normal. If the input voltage
is abnormal, supply power to the system.
9.5.2 AC Over Volt
Possible Causes
The AC voltage exceeds the alarm threshold.
The AC overvoltage alarm threshold is not properly set on the monitoring unit.
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