Huawei SUN2000 MB0 Series - Page 103

Alar
m ID
Alarm
Name
Alarm
Severity
Possible
Causes
Troubleshooting
PV strings is
reversely
connected.
● Cause ID = 7
The
optimizer
installation
position is
changed, or
PV strings
are
combined or
exchanged.
● Cause ID = 8
The sunlight
is weak or
changes
abnormally.
● Cause ID = 9
In partial
conguratio
n scenarios,
the PV string
voltage
exceeds the
inverter
input
voltage
specication
s.
● 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.
2081 Optimiz
er fault
Warning Cause ID = 1
The optimizer is
oine or faulty.
Go to the optimizer information
screen to view the fault details.
SUN2000-(12K-25K)-MB0 Series
User Manual 7 System Maintenance
Issue 01 (2023-04-30) Copyright © Huawei Digital Power Technologies Co., Ltd. 97