Huawei LUNA2000-2.0MWH-1H0 - Page 155

Alar
m ID
Alarm
Name
Severit
y
Possible Causes Troubleshooting Suggestions
3021 Abnormal
insulation
resistance
of the
cluster
controller
Major Cause ID = 1-3
1. The battery is short-
circuited to the
ground.
2. The environment
where the battery is
located is moist, and
the insulation
between the circuit
and the ground is
poor.
1. Determine the position of the input
and output circuit breakers associated
with [ESC-No].
2. Send a shutdown command, turn o
the battery switch and then the bus
switch, and wait for 5 minutes.
3. Check the battery output resistance
to ground (both on the battery side
and the bus side). If a short circuit
occurs or the insulation is
insucient,
rectify the fault.
4. Check whether the protection
grounding cables of the system are
correctly connected.
5. If the impedance is lower than the
specied protection threshold in rainy
and cloudy days, set <cf
id="Bold">Insulation resistance
protection</cf> using the mobile app,
SmartLogger, or NMS.
3022 The
temperat
ure of the
cluster
controller
is too
high.
Minor Cause ID = 1-9
1. The installation
position of the
cluster controller is
not well ventilated.
2. The ambient
temperature is
excessively high.
3. The cluster controller
is abnormal.
1. Check whether the ventilation in the
installation position of [ESC-No] is
good and whether the ambient
temperature exceeds the upper limit.
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 cluster controller
is faulty.
4. If the ventilation and ambient
temperature both meet requirements,
contact your dealer or Huawei
technical support.
LUNA2000-2.0MWH-1H0, 2H0 Smart String ESS
User Manual 10 Alarm Reference
Issue 02 (2021-11-15) Copyright © Huawei Technologies Co., Ltd. 147