Huawei SUN2000 Series User Manual page 67

SUN2000-(20KTL, 29.9KTL, 30KTL, 36KTL, 40KTL)-
M3
User Manual
ID Name
2040 Output
DC
compon
ent
overhigh
2051 Abnorm
al
residual
current
2061 Abnorm
al
groundin
g
Issue 01 (2020-10-15)
Severity Cause
Major Cause ID = 1
The DC component of the
inverter output current
exceeds the upper
threshold.
Major Cause ID = 1
The insulation impedance
of the input side to PE
decreases when the
inverter is operating.
Major Cause ID = 1
● The neutral wire or PE
cable of the inverter is
not connected.
● The output mode set for
the inverter is
inconsistent with the
cable connection mode.
Copyright © Huawei Technologies Co., Ltd.
8 Maintenance
Solution
● The inverter monitors its
external operating conditions
in real time and
automatically recovers after
the fault is rectified.
● If the alarm persists and
affects the energy yield of the
PV plant, contact your dealer
or Huawei technical support.
● If the alarm occurs
accidentally, the external
power cable may be
abnormal temporarily. The
inverter automatically
recovers after the fault is
rectified.
● If the alarm persists or lasts a
long time, check whether the
impedance between the PV
string and ground is too low.
Power off the inverter (turn off
the AC output switch and DC
input switch, and wait for a
period of time. For details about
the wait time, see the
description on the device safety
warning label), and then
perform the following
operations:
● Check whether the PE cable
for the inverter is connected
properly.
● If the inverter is connected to
a TN power grid, check
whether the neutral wire is
properly connected and
whether the voltage of the
neutral wire to ground is
normal.
● After the inverter is powered
on, check whether the output
mode set for the inverter is
consistent with the output
cable connection mode.
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