Huawei SUN2000-50KTL-ZHM3 - Page 86

ID Name Severity Cause Solution
2038 Unstable
grid
frequenc
y
Major Cause ID = 1
Power grid exception: The
actual change rate of the
power grid frequency does
not meet the requirements
for the local power grid
code.
1. If the alarm occurs
occasionally, the power grid
may be abnormal
temporarily. The inverter
automatically recovers after
detecting that the power grid
becomes normal.
2. If the alarm persists, check
whether the power grid
frequency is within the
acceptable range. If not,
contact the local power
operator.
2039 AC
Overcurr
ent
Major Cause ID = 1
The grid experiences a
dramatic voltage drop or is
short-circuited. As a result,
the transient AC current of
the device exceeds the
upper threshold and
triggers protection.
1. The device detects its external
working conditions in real time.
After the fault is rectied, the
device automatically recovers.
2. If the alarm occurs frequently
and
aects the operation of the
power plant, check whether AC
short circuit exists. If the fault
persists, contact your dealer or
technical support.
2040 Output
DC
compon
ent
overhigh
Major Cause ID = 1
The DC component of the
inverter output current
exceeds the upper
threshold.
1. The inverter monitors its
external operating conditions
in real time and
automatically recovers after
the fault is rectied.
2. If the alarm persists and
aects the energy yield of the
PV plant, contact your dealer
or Huawei technical support.
2051 Abnorm
al
residual
current
Major Cause ID = 1
The insulation impedance
of the input side to PE
decreases when the
inverter is operating.
1. If the alarm occurs
accidentally, the external
power cable may be
abnormal temporarily. The
inverter automatically
recovers after the fault is
rectied.
2. If the alarm persists or lasts a
long time, check whether the
impedance between the PV
string and ground is too low.
SUN2000-(50KTL-ZHM3, 50KTL-M3)
User Manual 8 Maintenance
Issue 05 (2023-02-28) Copyright © Huawei Technologies Co., Ltd. 78