Huawei SUN2000 Series User Manual page 89

SUN2000-(8KTL-20KTL)-M2
User Manual
Alarm Alarm Name
ID
2040 Output DC
Component
Overhigh
2051 Abnormal
Residual Current
2061 Abnormal
Grounding
Issue 01 (2020-07-02)
Alarm Possible Cause
Severity
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,
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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