Alar
m ID
Alarm
Name
Alarm
Severity
Possible
Causes
Troubleshooting
2080 Abnor
mal PV
module
congu
ration
Major ● Cause ID = 2
The PV
string power
or the
number of
optimizers
connected in
series in a
PV string
exceeds the
upper
threshold.
● Cause ID = 3
The number
of
optimizers
connected in
series in a
PV string is
less than the
lower
threshold,
the PV string
output is
reversely
connected,
or the
output of
some
optimizers in
the PV string
is reversely
connected.
● Cause ID = 6
Under the
same MPPT,
the number
of
optimizers
connected in
series in PV
strings
connected in
parallel is
dierent, or
the output
of some
optimizers in
Check whether the total number
of PV modules, number of PV
modules in a PV string, and
number of PV strings meet
requirements and whether the
PV module output is reversely
connected.
● Cause ID 2: Check whether
the PV string power or the
number of PV strings
connected in series exceeds
the upper threshold.
● Cause ID 3:
1. Check whether the number
of optimizers connected in
series in the PV string is
below the lower threshold.
2. Check whether the PV
string output is reversely
connected.
3. Check whether the PV
string output is
disconnected.
4. Check whether the
optimizer output extension
cable is correct (positive
connector at one end and
negative connector at the
other).
● Cause ID 6:
1. Check whether the number
of optimizers connected in
series in the PV strings
connected in parallel under
the same MPPT is the
same.
2. Check whether the
optimizer output extension
cable is correct (positive
connector at one end and
negative connector at the
other).
● Cause ID 7: When the
sunlight is normal, perform
the optimizer search function
again.
SUN2000-(12K-25K)-MB0 Series
User Manual 7 System Maintenance
Issue 01 (2023-04-30) Copyright © Huawei Digital Power Technologies Co., Ltd. 96
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