Huawei SUN2000-50KTL-ZHM3 User Manual page 77

SUN2000-(50KTL-ZHM3, 50KTL-M3)
User Manual
ID Name
2061 Abnorm
al
groundin
g
2062 Low
insulatio
n
resistanc
e
Issue 03 (2022-08-30)
Severity Cause
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.
Major Cause ID = 1
● The PV array is short-
circuited with PE.
● The PV string has been
in a moist environment
for a long time and the
circuit is not well
insulated to ground.
Copyright © Huawei Technologies Co., Ltd.
8 Maintenance
Solution
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:
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.
1. Check the impedance
between the PV string and
the PE cable. If a short circuit
occurs, rectify the fault.
2. Check whether the PE cable
of the inverter is correctly
connected.
3. If you have confirmed that
the impedance is lower than
the specified protection
threshold in a cloudy or rainy
environment, log in to the
app, SmartLogger, or NMS
and set Insulation resistance
protection threshold.
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