Huawei SUN2000-50KTL-M0 User Manual page 104

SUN2000-(50KTL, 60KTL, 65KTL)-M0
User Manual
Table 8-2 Common alarms and troubleshooting measures
Alarm Alarm Alarm
ID Name Severity
2001 High Major
String
Input
Voltage
2011 String Major
Reverse
Connec
tion
2012 String Warning
Current
Backfee
d
Issue 06 (2020-07-07)
Cause
The PV array is incorrectly
configured. Excessive PV modules
are connected in series to the PV
string, and hence the PV string
open-circuit voltage exceeds the
maximum operating voltage of
the SUN2000.
● Cause ID 1 corresponds to PV
strings 1 and 2.
● Cause ID 2 corresponds to PV
strings 3 and 4.
● Cause ID 3 corresponds to PV
strings 5 and 6.
● Cause ID 4 corresponds to PV
strings 7 and 8.
● Cause ID 5 corresponds to PV
strings 9 and 10.
● Cause ID 6 corresponds to PV
strings 11 and 12.
The PV string is reversely
connected.
Cause IDs 1 to 12 respectively
correspond to PV strings 1 to 12.
1. Only a few PV modules are
connected in series to the PV
string, and hence the end
voltage is lower than that of
other PV strings.
2. The PV string is shaded.
Cause IDs 1 to 12 respectively
correspond to PV strings 1 to 12.
Copyright © Huawei Technologies Co., Ltd.
8 Maintenance
Measures
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 operating voltage
of the SUN2000. After the PV
array configuration is
corrected, the alarm stops.
Check whether the PV string is
reversely connected to the
SUN2000. If yes, wait until the
solar irradiance declines at
night and the PV string
current reduces to below 0.5
A. Then, turn off the two DC
switches and correct the PV
string connection.
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. If yes, connect
more PV modules in series
to this PV string.
2. Check the open-circuit
voltage of the PV string.
3. Check that the PV string is
not shaded.
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