LUNA2000-2.0MWH Series Smart String ESS
User Manual
Alarm
Alarm
ID
Name
3821
Air
Condition
er DC
Overvolta
ge
3822
Air
Condition
er DC
Undervolt
age
3825
UPS
Alarm
Issue 08 (2022-11-15)
Severity
Possible Cause
Major
Cause ID = 1–13
1. The input voltage of
[HVAC-No] is higher
than the overvoltage
threshold.
2. The overvoltage
threshold setting is
improper.
3. The voltage test
device is faulty.
Major
Cause ID = 1–13
1. The input voltage of
[HVAC-No] is lower than
the undervoltage
threshold.
2. The undervoltage
threshold setting is
improper.
3. The voltage test
device is faulty.
Major
Cause ID = 1
A UPS alarm has been
generated.
Copyright © Huawei Technologies Co., Ltd.
10 Alarm Reference
Suggestion
1. Check the voltage of the input
power supply. If the voltage is too
high, check the power distribution
device.
2. Check whether the overvoltage
threshold is correctly set. If not,
adjust it to a proper range.
3. Replace the voltage test device
on the control board.
4. If the fault persists, contact your
dealer or technical support.
1. Check the voltage of the input
power supply. If the voltage is too
low, check the power distribution
device.
2. Check whether the undervoltage
threshold is correctly set. If not,
adjust it to a proper value.
3. Replace the voltage test device
on the control board.
4. If the fault persists, contact your
dealer or technical support.
Troubleshoot the fault by referring
to the alarm troubleshooting
section in the UPS user manual.
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