Huawei SUN2000-60KTL-M0 User Manual page 100

SUN2000-60KTL-M0
User Manual (Europe Edition)
Alarm Alarm Alarm
ID Name Severity
ion
2012 String Warning
Current
Backfee
d
2013 Abnorm Warning
al String
Power
2031 Phase Major
Wire
Short-Ci
rcuited
to PE
2032 Grid Major
Loss
2033 Grid Major
Undervo
ltage
Issue 02 (2018-10-15)
Cause
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.
1. The PV string has been shaded for a
long time.
2. The PV string deteriorates
abnormally.
Cause IDs 1 to 12 respectively
correspond to PV strings 1 to 12.
The impedance of the output phase
wire to PE is low or the output phase
wire is short-circuited to PE.
1. The power grid experiences an
outage.
2. The AC circuit is disconnected or
AC switch is off.
The grid voltage is below the lower
threshold or the low voltage duration
has lasted for more than the value
specified by LVRT.
Copyright © Huawei Technologies Co., Ltd.
8 Maintenance
Measures
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.
1. Check whether the current of
the abnormal PV string is
lower than the current of other
PV strings. If yes, check that
the abnormal PV string is not
shaded and the actual number
of PV strings is the same as the
configured number.
2. If the abnormal PV string is
clean and not shaded, check
whether the PV string is
damaged.
Check the impedance of the output
phase wire to PE, locate the
position with lower impedance,
and rectify the fault.
1. The alarm disappears
automatically after the power
grid recovers.
2. Check that the AC power cable
is connected and that the AC
switch is ON.
1. If the alarm occurs
accidentally, the power grid
may be abnormal temporarily.
The SUN2000 automatically
recovers after detecting that the
power grid becomes normal.
2. If the alarm occurs frequently,
check whether the power grid
voltage is within the acceptable
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