Huawei SUN2000 Series User Manual page 64

Alarm ID Alarm
Name
2038 Unstable
Grid
Frequency
2039 Output
Overcurre
nt
2040 Output DC
Componen
t Overhigh
2051 Abnormal
Residual
Current
Issue 02 (2019-04-30)
Alarm Possible Cause
Severity
Major Power grid exception: The
actual grid frequency change
rate does not comply with the
local power grid standard.
Major 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 The DC component of the
SUN2000 output current
exceeds the specified upper
threshold.
Major The insulation impedance of
the input side to PE decreases
when the SUN2000 is
operating.
Copyright © Huawei Technologies Co., Ltd.
SUN2000-(3KTL-10KTL)
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.
User Manual
Page 64 of 81