Huawei SUN2000-3KTL-M1 - Page 96

ID Name Severity Cause Solution
2038 Unstable
grid
frequency
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 SUN2000
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 Output
overcurre
nt
Major Cause ID = 1
The power grid voltage
drops dramatically or the
power grid is short-
circuited. As a result, the
SUN2000 transient output
current exceeds the upper
threshold, and protection is
triggered.
1. The SUN2000 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
power plant, check whether
the output is short-circuited.
If the fault persists, contact
your dealer or Huawei
technical support.
2040 Output
DC
compone
nt
overhigh
Major Cause ID = 1
The DC component in the
power grid current exceeds
the upper threshold.
1. The SUN2000 monitors its
external operating conditions
in real time and
automatically recovers after
the fault is rectied.
2. If the alarm persists, contact
your dealer or Huawei
technical support.
2051 Abnorma
l residual
current
Major Cause ID = 1
The input-to-ground
insulation impedance has
decreased during the
SUN2000 operation.
1. If the alarm occurs
accidentally, the external
power cable may be
abnormal temporarily. The
SUN2000 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-(3KTL-10KTL)-M1
User Manual 8 Maintenance
Issue 02 (2020-11-20) Copyright © Huawei Technologies Co., Ltd. 89