Alarm
ID
Alarm
Name
Alarm
Severity
Cause Measures
2013 Abnor
mal
String
Power
Warning 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.
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
congured number.
2. If the abnormal PV string is
clean and not shaded,
check whether the PV
string is damaged.
2031 Phase
Wire
Short-
Circuite
d to PE
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.
Check the impedance of the
output phase wire to PE,
locate the position with lower
impedance, and rectify the
fault.
2032 Grid
Loss
Major Cause ID = 1
1. The power grid experiences an
outage.
2. The AC circuit is disconnected
or AC switch is o.
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.
2033 Grid
Underv
oltage
Major Cause ID = 1
The grid voltage is below the
lower threshold or the low voltage
duration has lasted for more than
the value specied by LVRT.
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
range. If no, contact the
local power operator. If yes,
modify the power grid
undervoltage protection
threshold with the consent
of the local power operator.
3. If the fault persists for a
long time, check the AC
circuit breaker and AC
output power cable.
SUN2000-(70KTL, 75KTL)-C1
User Manual 8 Maintenance
Issue 09 (2020-10-12) Copyright © Huawei Technologies Co., Ltd. 99
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