Huawei SUN2000 Series User Manual page 76

SUN2000-(3KTL-10KTL)-M0
User Manual
Alarm ID Alarm
Name
2039 Output
Overcurre
nt
Output DC
2040
Componen
t Overhigh
2051 Abnormal
Residual
Current
2061 Abnormal
Grounding
Issue 04 (2019-10-18)
Alarm Possible Cause
Severity
Major Cause ID = 1
The grid voltage drops
dramatically or the power grid
is short-circuited. As a result,
the inverter transient output
current exceeds the upper
threshold, and inverter
protection is triggered.
Major Cause ID = 1
The DC component in the grid
current exceeds the upper
threshold.
Major Cause ID = 1
The input-to-ground insulation
impedance has decreased
during the inverter operation.
Major Cause ID = 1
 The neutral wire or ground
cable is not connected.
 The PV array is grounded,
but the inverter output does
not connect to an isolation
transformer.
Copyright © Huawei Technologies Co., Ltd.
Troubleshooting Suggestion
1. The inverter monitors its external
working conditions in real time.
The inverter automatically
recovers after the fault is
rectified.
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 inverter monitors its external
working conditions in real time.
The inverter automatically
recovers after the fault is
rectified.
2. If the alarm occurs frequently,
contact your dealer or Huawei
technical support.
1. If the alarm occurs accidentally,
the external power cable may be
abnormal temporarily. The
inverter automatically recovers
after the fault is rectified.
2. If the alarm occurs frequently or
persists, check that the impedance
between the PV string and ground
is not below the lower threshold.
Power off the inverter (turn off the
AC output switch and DC input
switch, and wait for 5 minutes), and
then perform the following
operations:
1. Check that the PE cable for the
inverter is connected properly.
2. If the inverter is connected to the
TN power grid, check whether
the N cable is properly connected
and whether the voltage to
ground is normal.
3. Check whether the AC output
connects to an isolation
transformer. If yes, after
powering on the inverter, log in
to the mobile phone app,
SmartLogger, or NMS and
disable Grounding inspection.
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