Huawei SUN2000 Series User Manual page 99

SUN2000-(100KTL, 110KTL, 115KTL)-M2
User Manual
Alarm Alarm
ID Name
2012 String
Current
Backfeed
Issue 02 (2022-06-30)
Alarm Possible Cause
Severity
Warnin Cause ID = 1–20: PV1–PV20
g
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
Suggestion
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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