Huawei LUNA2000-200KWH-2H1 - Page 45

Alarm
ID
Alarm
Name
Alarm
Severit
y
Possible Cause Suggestion
3843 TCU
Commu
nication
Failure
Minor Cause ID = 1
TCU-1 communication
failed.
1. Turn o the TCU power switch.
2. Check whether the communication
cable is correctly connected to the
device. If not, connect the cable
correctly.
3. Check whether the power supply of
the device is normal. If not, contact
your technical support.
3844 SMU
Commu
nication
Failure
Minor Cause ID = 1
SMU communication
failed.
1. Check whether the communication
cable is correctly connected to the
device. If not, reconnect the cable
properly.
2. Check whether the power cable of the
device is loose. If yes, connect it
securely.
3. If the fault persists, contact your
technical support.
3845 SmartM
odule
Commu
nication
Failure
Minor Cause ID = 1
SmartModule
communication failed.
1. Check whether the communication
cable is correctly connected to the
device. If not, reconnect the cable
properly.
2. Check whether the power cable of the
device is loose. If yes, connect it
securely.
3. Check whether a
certicate expiration
alarm is displayed in the alarm list. If
yes, contact your technical support.
4. If the fault persists, contact your
technical support.
3846 CMU
Commu
nication
Failure
Minor Cause ID = 1
CMU communication
failed.
1. Check whether the communication
cable is correctly connected to the
device. If not, reconnect the cable
properly.
2. Check whether the power cable of the
device is loose. If yes, connect it
securely.
3. If the fault persists, contact your
technical support.
LUNA2000-200KWH-2H1 Smart String ESS
Maintenance Manual 3 Alarm Reference
Issue 02 (2023-02-28) Copyright © Huawei Digital Power Technologies Co., Ltd. 39