Table 10-4 BMU common alarms and troubleshooting measures
Alarm
ID
Alarm
Name
Severity Possible Cause Suggestion
3027 Battery
Pack
Monitorin
g Board
Abnormal
Major Cause ID = 1–20
A major fault has
occurred on the internal
circuit of the battery
pack monitoring device.
1. The 3027-1 alarm (cell voltage
sampling fault) does not aect
the running of other battery
packs.
2. Determine the positions of the
input and output circuit breakers
of the ESC corresponding to
[ESR-CabinetNo ESM-SlotNo].
3. Issue a shutdown command,
turn
o the switch on the
battery side, the switch on the
bus side, and the AC power
supply switch, and wait for 5
minutes.
4. Turn on the AC power supply
switch, the switch on the battery
side, and the switch on the bus
side in sequence, and issue a
startup command.
5. If the alarm persists, contact
your dealer or technical support.
Major
Cause ID = 21
The BMU is
incompatible with the
battery pack.
The BMU is incompatible. Contact
your technical support to deliver a
replacement of the original model.
3028 Battery
Pack
Abnormal
Major Cause ID = 1–8
A major fault has
occurred on the battery
pack.
1. Determine the positions of the
input and output circuit breakers
of the ESC corresponding to
[ESR-CabinetNo ESM-SlotNo].
2. Issue a shutdown command,
turn
o the switch on the
battery side, the switch on the
bus side, and the AC power
supply switch.
3. Contact your dealer or technical
support to replace the battery
pack.
LUNA2000-2.0MWH Series Smart String ESS
User Manual 10 Alarm Reference
Issue 08 (2022-11-15) Copyright © Huawei Technologies Co., Ltd. 208
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