Huawei LUNA2000-2.0MWH Series User Manual page 199

LUNA2000-2.0MWH Series Smart String ESS
User Manual
Alarm Alarm
ID Name
3857 Memory
Exception
3858 48 V DC
Auxiliary
Power
Supply
Faulty
3859 Forced
Dehumidif
ication
Started
3860 IO
Expansion
Board
Fault
Issue 08 (2022-11-15)
Severity Possible Cause
Minor Cause ID = 1
1. The storage space is
insufficient.
2. The memory is faulty.
Major Cause ID = 1
1. The 48 V DC auxiliary
power supply is
inadequate.
2. The SMU
communication failed or
the SMU is not
connected.
Major Cause ID = 1
1. Forced
dehumidification has
been manually started.
2. To prevent
condensation in the
cabinet after the cabinet
door is opened, the
system automatically
starts forced
dehumidification.
Minor Cause ID = 1
IO Expansion Board
Fault
NO TE
If ALM-3833 Rectifier Fault, ALM-3834 Rectifier Protection, ALM-3835 Rectifier
Communication Failure, ALM-3836 Rectifier Power Failure, or ALM-3837 Rectifier
Output Overvoltage is generated, rectify the fault by referring to the following table.
Copyright © Huawei Technologies Co., Ltd.
10 Alarm Reference
Suggestion
Contact your technical support.
1. Check whether the rectifier is
correctly installed.
2. Maintain the rectifier 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.
1. Wait for 20 to 30 minutes for the
system to automatically stop forced
dehumidification.
2. If you manually start forced
dehumidification, the system will
shut down after forced
dehumidification is completed. You
need to manually start the system.
3. If forced dehumidification is
automatically started, the system
automatically restores to the
original state after forced
dehumidification is completed.
1. Check whether the cable
between the I/O expansion board
and the CMU (RS485-1) is correctly
connected. If not, reconnect the
cable.
2. Check whether the power cable
of the I/O expansion board is loose.
If yes, connect the cable securely.
3. If the fault persists, contact your
technical support.
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