Huawei SUN2000-111KTL-NHM0 User Manual page 115

SUN2000-111KTL-NHM0
User Manual
Alarm Alarm
ID Name
2012 String
Current
Backfeed
Issue 09 (2023-12-18)
Alarm Possible Causes
Severity
Warning Cause ID = 1–20: PV1–PV20
Only a few PV modules are
connected in series in the PV
string. Therefore, the terminal
voltage is lower than that of other
PV strings.
Copyright © Huawei Technologies Co., Ltd.
8 Maintenance
Suggestions
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. If yes, wait
until the solar
irradiance declines at
night and the PV string
current drops below
0.5 A. Then, turn off
the DC switches and
add more PV modules.
2. Check whether the PV
string is shaded.
3. Check whether the
open-circuit voltage of
the PV string is
normal.
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