Huawei SUN2000-M0 Series User Manual page 70

SUN2000-(5KTL, 6KTL)-M0
User Manual
Alarm ID Alarm
Name
2038 Unstable
Grid
Frequency
Output
2039
Overcurre
nt
Output
2040
DC
Compone
nt
Overhigh
2051 Abnormal
Residual
Current
Issue 03 (2019-07-19)
Alarm Possible Cause
Severity
Major Cause ID = 1
Power grid exception: The
actual grid frequency change
rate does not comply with the
local power grid standard.
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 therefore the
protection is triggered.
Major Cause ID = 1
The DC component of the
SUN2000 output current
exceeds the specified upper
threshold.
Major Cause ID = 1
The insulation impedance of
the input side to PE decreases
when the SUN2000 is
operating.
Copyright © Huawei Technologies Co., Ltd.
Troubleshooting Suggestion
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 occurs frequently,
check whether the power grid
frequency is within the
acceptable range. If not, contact
the local power operator.
1. The SUN2000 detects its
external working conditions in
real time. After the fault is
rectified, it automatically
recovers.
2. If the alarm occurs frequently
and affects the power production
of the PV plant, check whether
the output is short-circuited. If
the fault persists, contact your
dealer or Huawei technical
support.
1. The SUN2000 detects its
external working conditions in
real time. After the fault is
rectified, it automatically
recovers.
2. If the alarm occurs frequently,
contact your dealer or Huawei
technical support.
1. If the alarm occurs occasionally,
the external power cable may be
abnormal temporarily. The
SUN2000 automatically
recovers after the fault is
rectified.
2. If the alarm occurs frequently or
persists, check whether the
impedance of the PV string to
ground is excessively low.
7 Maintenance
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