Huawei SUN2000-3KTL-M1 - Page 92

Table 8-2 Common fault alarm list
ID Name Severity Cause Solution
2001 High
string
input
voltage
Major The PV array is not
properly congured.
Excessive PV modules are
connected in series to the
PV string; therefore the PV
string open-circuit voltage
exceeds the maximum
SUN2000 operating
voltage.
Cause ID 1 or 2: PV strings
1 and 2
Reduce the number of PV
modules connected in series to
the PV string until the PV string
open-circuit voltage is less than
or equal to the maximum
SUN2000 operating voltage.
After the PV string
conguration
is corrected, the alarm
disappears.
2002 DC arc
fault
Major The PV string power cables
arc or are in poor contact.
● Cause ID 1 = PV1
● Cause ID 2 = PV2
Check whether the PV string
cables arc or are in poor contact.
2003 DC arc
fault
Major The PV string power cables
arc or are in poor contact.
● Cause ID 1 = PV1
● Cause ID 2 = PV2
Check whether the PV string
cables arc or are in poor contact.
2011 String
reverse
connectio
n
Major The PV string polarity is
reversed.
● Cause ID 1 = PV1
● Cause ID 2 = PV2
Check whether the PV string is
reversely connected to the
SUN2000. If so, wait until the PV
string current decreases to
below 0.5 A. Then, turn o the
DC switch and correct the PV
string polarity.
2012 String
current
backfeed
Warning The number of PV modules
connected in series to the
PV string is insucient. As
a result, the end voltage is
lower than that of other
strings.
● Cause ID 1 = PV1
● Cause ID 2 = PV2
1. Check whether the number
of PV modules connected in
series to this PV string is less
than that of the other PV
strings connected in parallel.
If so, wait until the PV string
current decreases to below
0.5 A. Then, turn
o the DC
switch 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 abnormal.
SUN2000-(3KTL-10KTL)-M1
User Manual 8 Maintenance
Issue 02 (2020-11-20) Copyright © Huawei Technologies Co., Ltd. 85