Huawei SUN2000-M3 User Manual page 92

SUN2000-(20KTL, 29.9KTL, 30KTL, 36KTL, 40KTL)-
M3
User Manual
ID Name
Issue 11 (2023-01-10)
Severity Cause
● Cause ID = 8
The sunlight is weak or
changes abnormally.
● Cause ID = 9
In partial configuration
scenarios, the PV string
voltage exceeds the
inverter input voltage
specifications.
Copyright © Huawei Technologies Co., Ltd.
8 Maintenance
Solution
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.
● Cause ID 8: When the
sunlight is normal, perform
the optimizer search function
again.
● Cause ID 9: Calculate the PV
string voltage based on the
number of PV modules in the
string and check whether the
string voltage exceeds the
upper threshold of the
inverter input voltage.
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