Huawei SUN2000-4.95KTL-JPL1 User Manual page 78

SUN2000-4.95KTL-JPL1
User Manual
Alarm Alarm Name
ID
2003 DC Arc Fault
2011 String Reversed
2012 String Current
Backfeed
Issue 05 (2023-02-17)
Alarm Possible Causes
Severity
Major The PV string power cables
arc or are in poor contact.
(string-level fine detection)
● Cause ID 1: PV string 1
● Cause ID 2: PV string 2
● Cause ID 3: PV string 3
Major The PV string is reversely
connected.
Cause ID = 1, 2
● Cause ID 1: PV1 is
reversely connected.
● Cause ID 2: PV2 is
reversely connected.
Warning The number of PV modules
connected in series to the
PV string is insufficient. As
a result, the end voltage is
lower than that of other
strings.
Cause ID 1–4: PV strings 1–
4
Copyright © Huawei Technologies Co., Ltd.
8 Maintenance
Troubleshooting
Check whether the string
cables arc or are in poor
contact.
Check whether the PV
string is reversely
connected to the SUN2000.
If yes, wait until the PV
string current decreases
below 0.5 A, set DC switch
to OFF, and adjust the PV
string polarity.
1. Check whether the
number of PV modules
connected in series to
this PV string is less than
the number of PV
modules connected in
series to the other PV
strings connected in
parallel with this PV
string. If yes, wait until
the PV string current
drops below 0.5 A, set
the 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.
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