Huawei SUN2000-300KTL Series - Page 95

Alar
m ID
Alarm
Name
Alarm
Severity
Possible Cause Suggestion
2010 Abnorm
al DC
Input
Major Cause ID = 1
1. DC switch 1 is OFF.
2. PV strings 1 to 9 are not
connected.
Cause ID = 2
The DC SWITCH is OFF.
Cause ID = 1
1. Turn on DC switch 1.
2. If the alarm persists, check that at
least one of PV strings 1 to 9 is
connected.
Cause ID = 2
1. Manually turn on the AUX.
SWITCH.
2. Turn on all DC SWITCH manually.
3. Manually turn
o the AUX.
SWITCH.
4. If the fault persists, contact your
dealer or technical support.
2011 String
Reverse
Connecti
on
Major Cause ID = 1–28,
corresponding to PV1–PV28
respectively.
The PV string is reversely
connected.
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
o the AC and DC switches,
wait for 5 minutes, and then turn
on the AC and DC switches.
2012 String
Current
Backfee
d
Warning Cause ID = 1–28,
corresponding to PV1–PV28
respectively.
1. 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.
2. Reverse polarity occurs
in the string.
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.
4. Check whether PV modules in the
PV string are connected in reverse
polarity.
SUN2000-(250KTL, 280KTL, 300KTL, 330KTL) Series
User Manual 9 Alarm Reference
Issue 07 (2023-06-30) Copyright © Huawei Technologies Co., Ltd. 88