Huawei LUNA2000-2.0MWH Series User Manual page 206

LUNA2000-2.0MWH Series Smart String ESS
User Manual
Alarm Alarm
ID Name
3021 Insulation
Resistance
of Rack
Controller
Abnormal
3022 Rack
Controller
Temperat
ure High
Issue 08 (2022-11-15)
Severity Possible Cause
Major Cause ID = 1–3
1. The battery is
short-circuited to
the ground.
2. The battery is in a
humid environment
and the insulation
between the
battery and ground
is poor.
Minor Cause ID = 1–9
1. The installation
position of the battery
power control module
is not well ventilated.
2. The ambient
temperature is too
high.
3. The battery power
control module is
abnormal.
4. The fan of the
battery power control
module is abnormal.
Copyright © Huawei Technologies Co., Ltd.
10 Alarm Reference
Suggestion
1. Locate the input and output
circuit breakers associated with
[ESC-No].
2. Issue a hibernation command to
the ESR corresponding to the ESC,
and turn off the switch on the
battery side and the switch on the
bus side in sequence, and wait for 5
minutes.
3. Check the ground impedance of
the battery output (measured on
both the battery side and the bus
side). If a short circuit occurs or the
insulation is insufficient, rectify the
fault.
4. Check whether the PE cable of the
system is correctly connected.
5. If the impedance is lower than the
specified protection threshold in
rainy and cloudy days, set Insulation
resistance protection threshold using
the mobile app, SmartLogger, or
NMS.
6. After checking that the battery
power cable is correctly connected,
turn on the switch on the battery
side and the switch on the bus side
in sequence, and issue a running
command.
7. If the alarm persists, contact your
dealer or technical support.
1. Check the ventilation of [ESC-No]
and whether the ambient
temperature of the optimizer
exceeds the upper threshold.
2. If the ventilation is poor or the
ambient temperature exceeds the
upper threshold, improve the
ventilation and heat dissipation.
3. Check whether the internal or
external fan of the rack controller
is faulty.
4. If the ventilation and ambient
temperature meet requirements,
contact your dealer or technical
support.
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