Alarm
ID
Alarm Name Alarm
Severity
Cause Troubleshooting Suggestions
2012 String Current
Backfeed
Warning 1. 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.
2. The PV string is
shaded.
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 07 (2021-07-08) Copyright © Huawei Technologies Co., Ltd. 92
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