Huawei SUN2000-250KTL Series User Manual page 84

SUN2000-(250KTL, 280KTL, 300KTL, 330KTL) Series
User Manual
Alar Alarm
m ID Name
2011 String
Reverse
Connecti
on
2012 String
Current
Backfee
d
2013 Abnorm
al String
Power
Issue 02 (2022-12-20)
Alarm Possible Cause
Severity
Major Cause ID = 1–28,
corresponding to PV1–PV28
respectively.
The PV string is reversely
connected.
Warning Cause ID = 1–28,
corresponding to PV1–PV28
respectively.
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.
Warning Cause ID = 1–28,
corresponding to PV1–PV28
respectively.
● The PV string is shaded
for a long time.
● The PV string has aged
abnormally.
Copyright © Huawei Technologies Co., Ltd.
8 System Maintenance
Suggestion
1. Check whether the PV string is
connected to the device in reverse
polarity. If yes, wait until the PV
string current decreases to below
0.5 A, set DC SWITCH to OFF, and
adjust the PV string polarity.
2. If the fault persists, reset the
device on the local maintenance
app or WebUI of the upper-layer
controller. Alternatively, you can
turn off the AC and DC switches,
wait for 5 minutes, and then turn
on the AC and DC switches.
1. Check whether the number of PV
modules connected in series in this
PV string is less than the number
of PV modules connected in series
in the other PV strings connected
in parallel with this PV string. If
yes, wait until the PV string
current drops to below 0.5 A, set
DC SWITCH to OFF, and adjust
the number of PV modules in the
PV string.
2. Check whether the PV string is
shaded.
3. Check whether the open-circuit
voltage of the PV string is normal.
1. Check whether the PV string
current is obviously lower than the
currents of other PV strings.
2. If yes, check whether the PV string
is shaded.
3. If the PV string is clean and not
shaded, check whether any PV
module is faulty.
78