Huawei SUN2000-50KTL-M0 User Manual page 100

SUN2000-(50KTL-M0, 70KTL-INM0)
User Manual (India Edition)
Table 8-2 Common alarms and troubleshooting measures
Alarm Alarm
ID Name
2001 High
String
Input
Voltage
2011 String
Reverse
Connect
ion
2012 String
Current
Backfee
d
Issue 03 (2019-07-30)
Alarm Cause
Severity
Major 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.
Major 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
Warning
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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