Huawei 01075345 User Manual page 109

SUN2000-(2KTL-6KTL)-L1
User Manual
Alarm Alarm Name
ID
2081 Optimizer Fault
2082 Grid-tied/Off-
grid Controller
Abnormal
Issue 10 (2023-02-13)
Alarm Possible Causes
Severity
Warning Cause ID = 1
An optimizer is faulty.
Major Cause ID = 1
The inverter fails to
communicate with the
Smart Backup Box.
Cause ID = 2
An unrecoverable fault
occurs on a circuit inside
the Smart Backup Box.
NO TE
Contact your dealer if all failure analysis procedures listed above are completed and the
fault still exists.
Copyright © Huawei Technologies Co., Ltd.
8 System Maintenance
Troubleshooting
● ID7: When the sunlight
is normal, perform the
optimizer search
function again.
● ID8: When the sunlight
is normal, perform the
optimizer search
function again.
● ID9: Calculate the PV
string voltage based on
the number of PV
modules in the PV string
and check whether the
PV string voltage
exceeds the upper
threshold of the inverter
input voltage.
Go to the optimizer
information screen to view
the fault details.
1. Send a shutdown
command on the App.
Turn off the AC output
switch, DC input switch,
and battery switch.
2. Check whether the
power cable and RS485
cable between the
Smart Backup Box and
the inverter are normal.
3. After 5 minutes, turn on
the battery switch, AC
output side, AC output
switch, and DC input
switch.
4. If the alarm persists,
contact your dealer or
Huawei technical
support.
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