Huawei SUN2000-196KTL-H0 User Manual page 89

SUN2000-(196KTL-H0, 200KTL-H2, 215KTL-H0)
User Manual
Alarm Alarm Name
ID
2012 String Current
Backfeed
2015 PV String Loss
2031 Phase Wire
Short-Circuited
to PE
2032 Grid Loss
Issue 02 (2020-10-30)
Alarm Cause
Severity
Warning 1. Only a few PV modules
are connected in series
in the PV string.
Therefore, the end
voltage is lower than
that of other PV strings.
2. The PV string is shaded.
Cause ID 1–18: PV strings
1–18
Warning This alarm is generated
when the PV string status
is abnormal in the
following conditions:
● A single PV string is
lost.
● Both 2-in-1 PV strings
are lost.
● Either of the 2-in-1 PV
strings is lost.
Cause ID 1–8: PV strings
1–18
Major Cause ID=1
The impedance of the
output phase wire to PE is
low or the output phase
wire is short-circuited to
PE.
Major Cause ID=1
1. The power grid
experiences an outage.
2. The AC circuit is
disconnected or the AC
switch is off.
Copyright © Huawei Technologies Co., Ltd.
8 Maintenance
Troubleshooting Suggestions
1. Check whether the number
of PV modules connected
in series in the PV string is
less than that in other PV
strings connected in
parallel with this PV string.
If yes, wait until the PV
string current drops below
0.5 A, set all DC switches to
OFF, and adjust the
number of PV modules in
the PV string.
2. Check whether the open-
circuit voltage of the PV
string is normal.
3. Check whether the PV
string is shaded.
1. If the PV string access type
is manually set, check
whether it is consistent
with the actual access
status.
2. Check whether the inverter
terminals are properly
connected.
3. Check whether the PV
string terminals are
properly connected.
4. If a 2-in-1 terminal is used,
check whether it is normal.
Check the impedance of the
output phase wire to PE,
locate the position with lower
impedance, and rectify the
fault.
1. The alarm is automatically
cleared after the power
grid is restored.
2. Check whether the AC
circuit is disconnected or
the AC switch is off.
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