Alarm
ID
Alarm Name Alarm
Severity
Cause Troubleshooting Suggestions
2011 String Reverse
Connection
Major The PV string is reversely
connected.
Cause ID 1–18: PV strings
1–18
Check whether the PV string is
reversely connected to the
inverter. If yes, wait until the
PV string current drops below
0.5 A. Then, set all DC switches
to OFF and correct the PV
string connection.
2012 String Current
Backfeed
Warning Only a few PV modules
are connected in series in
the PV string. Therefore,
the end voltage is lower
than that of other PV
strings.
Cause ID 1–18: PV strings
1–18
1. Check whether the number
of PV modules connected in
series in the PV string is less
than that in other PV
strings connected in parallel
with this PV string. If yes,
wait until the PV string
current drops below 0.5 A,
set all DC switches to OFF,
and adjust the number of
PV modules in the PV
string.
2. Check whether the open-
circuit voltage of the PV
string is normal.
3. Check whether the PV
string is shaded.
SUN2000-(196KTL-H0, 200KTL-H2, 215KTL-H0)
Series
User Manual 8 Maintenance
Issue 08 (2021-09-30) Copyright © Huawei Technologies Co., Ltd. 94
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