ID Name Severity Cause Solution
2040 Output
DC
compon
ent
overhigh
Major Cause ID = 1
The DC component of the
inverter output current
exceeds the upper
threshold.
1. The inverter monitors its
external operating conditions
in real time and
automatically recovers after
the fault is rectied.
2. If the alarm persists and
aects the energy yield of the
PV plant, contact your dealer
or Huawei technical support.
2051 Abnorm
al
residual
current
Major Cause ID = 1
The insulation impedance
of the input side to PE
decreases when the
inverter is operating.
1. If the alarm occurs
accidentally, the external
power cable may be
abnormal temporarily. The
inverter automatically
recovers after the fault is
rectied.
2. If the alarm persists or lasts a
long time, check whether the
impedance between the PV
string and ground is too low.
2061 Abnorm
al
groundin
g
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.
Power o the inverter (turn o
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:
1. Check whether the PE cable
for the inverter is connected
properly.
2. 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.
3. After the inverter is powered
on, check whether the output
mode set for the inverter is
consistent with the output
cable connection mode.
SUN2000-(20KTL, 29.9KTL, 30KTL, 36KTL, 40KTL)-
M3
User Manual 8 Maintenance
Issue 11 (2023-01-10) Copyright © Huawei Technologies Co., Ltd. 79
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