Huawei LUNA2000-2.0MWH-1H0 - Page 151

Alar
m ID
Alarm
Name
Severit
y
Possible Causes Troubleshooting Suggestions
3843 TCU
Communi
cation
Failure
Minor Cause ID=1-2
TCU communication
failed.
3844 Rectier
Communi
cation
Failure
Minor Cause ID=1
Rectier communication
failed.
3845 SmartMo
dule
Communi
cation
Failure
Minor Cause ID=1
SmartModule
communication failed.
1. Check whether the communications
cable of the device is correctly
connected.
2. Check whether the power supply of
the device is normal.
3. Check whether a
certicate
expiration alarm exists in the alarm
list.
3846 CMU
Communi
cation
Failure
Minor Cause ID=1
CMU communication
failed.
1. Check whether the communications
cable of the device is correctly
connected.
2. Check whether the power supply of
the device is normal.
3851 Exhaust
Fan
Faulty
Minor Cause ID=1 - 12
Exhaust fan is faulty.
1. Check whether the cable connection
of the exhaust fan is correct.
2. Check whether the TCU connected
to the exhaust fan works properly.
3. Check whether the exhaust fan is
faulty. If yes, replace it.
3853 ESU
Physical
Location
Failure
Minor Cause ID=1
ESU physical location
failure.
Check whether the communications
cable of the ESU is connected properly.
3856 Battery
fault
protectio
n
Major Cause ID=1
Some battery modules
fail critically, causing the
system to shut down.
Perform maintenance based on the
faulty battery module alarm and its
handling suggestions.
Cause ID=2
The temperature of some
battery modules is too
low. As a result, the
system charge limit is
exceeded.
LUNA2000-2.0MWH-1H0, 2H0 Smart String ESS
User Manual 10 Alarm Reference
Issue 02 (2021-11-15) Copyright © Huawei Technologies Co., Ltd. 143