Huawei LUNA2000-2.0MWH Series User Manual page 205

LUNA2000-2.0MWH Series Smart String ESS
User Manual
Alarm Alarm
ID Name
3019 Bus Side
Overvolta
ge on
Rack
Controller
3020 Bus Side
Reverse
Polarity
on Rack
Controller
Issue 08 (2022-11-15)
Severity Possible Cause
Major Cause ID = 1–3
The bus cable is not
correctly connected, or
the bus voltage
exceeds the maximum
operating voltage of
the power module.
Major Cause ID = 1–3
The bus is connected
in reverse polarity.
Copyright © Huawei Technologies Co., Ltd.
10 Alarm Reference
Suggestion
1. Locate the input and output
circuit breakers associated with
[ESC-No].
2. Issue a shutdown command, turn
off the switch on the battery side
and then the switch on the bus
side, and wait for 5 minutes.
3. Check the cable connections on
the bus side of the power control
module by referring to the
maintenance manual of the
product.
4. After checking that the battery
power cable is correctly
connected, turn on the switch on
the battery side and then the
switch on the bus side, and issue
a startup command.
5. If the alarm persists, contact your
dealer or technical support.
1. Locate the input and output
circuit breakers associated with
[ESC-No].
2. Issue a shutdown command, turn
off the switch on the battery side
and then the switch on the bus
side, and wait for 5 minutes.
3. Check whether the cable between
the copper bar on the bus side of
the power control module and
the DC LV Panel is connected in
reverse polarity by referring to
the product maintenance manual.
4. After checking that the battery
power cable is correctly
connected, turn on the switch on
the battery side and then the
switch on the bus side, and issue
a startup command.
5. If the alarm persists, contact your
dealer or technical support.
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