Huawei LUNA2000-200KWH-2H1 - 10.4 Resetting the ESU

Alarm
ID
Alarm
Name
Alarm
Severit
y
Possible Cause Suggestion
3853 ESC
Physical
Location
Failure
Minor Cause ID = 1
ESC physical location
failed.
1. Check whether the network
connections between the ESCs are
normal.
2. Check whether the network
connections between the CMU and the
rst and last nodes of the ESC are
normal.
3. Check whether the RS485 cable
between ESC-1 and the CMU is
properly connected.
3856 Battery
Fault
Protecti
on
Major Cause ID = 1
Some battery packs
are severely faulty,
causing the system to
shut down.
Cause ID = 2
The temperature of
some battery packs is
too low. As a result,
charge capacity is not
reached due to low
temperature
protection.
Maintain the battery pack based on the
alarm and troubleshooting suggestions.
3857 Memory
Abnorm
al
Minor Cause ID = 1
1. The storage space is
insucient.
2. The memory is
faulty.
Contact your technical support.
3858 48 V DC
Auxiliar
y Power
Failure
Major Cause ID = 1
1. The rectier is
faulty.
2. The SMU
communication
failed or the SMU is
not connected.
1. Check whether the rectier is correctly
installed.
2. Maintain the rectier based on the
alarm and troubleshooting
suggestions.
3. Check whether the SMU has been
added to the device list.
4. Maintain the SMU based on the alarm
and troubleshooting suggestions.
LUNA2000-200KWH-2H1 Smart String ESS
User Manual 13 Alarm Reference
Issue 03 (2023-03-30) Copyright © Huawei Digital Power Technologies Co., Ltd. 164