Huawei SUN2000-75KTL Series User Manual page 121

SUN2000-(75KTL, 100KTL, 110KTL, 125KTL) Series
User Manual
Alarm Alarm
ID Name
2012 String
Current
Backfee
d
Issue 11 (2021-11-10)
Alarm Possible Causes
Severit
y
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
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.
112