Huawei SUN2000 Series - Page 99

Alarm
ID
Alarm
Name
Alarm
Severity
Possible Cause Suggestion
2012 String
Current
Backfeed
Warnin
g
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.
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
o 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.
SUN2000-(100KTL, 110KTL, 115KTL)-M2
User Manual 8 Maintenance
Issue 02 (2022-06-30) Copyright © Huawei Technologies Co., Ltd. 93