Huawei SUN2000 M0 Series User Manual page 82

SUN2000-(3KTL-10KTL)-M0
User Manual
Alarm ID Alarm
Name
2061 Abnorma
l
Groundin
g
2062 Low
Insulatio
n
Resistanc
e
Issue 06 (2020-10-23)
Alarm Possible Cause
Severity
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.
Major Cause ID = 1
● The PV array is short-
circuited to ground.
● The PV array is in a
moist environment and
the power cable is not
well insulated to
ground.
Copyright © Huawei Technologies Co., Ltd.
7 Maintenance
Troubleshooting Suggestion
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.
1. Check the impedance
between the PV array output
and PE, and eliminate short
circuits and poor insulation
points.
2. Check that the PE cable for
the inverter is connected
correctly.
3. If you are sure that the
impedance is less than the
preset protection threshold in
a cloudy or rainy
environment, log in to the
mobile phone app,
SmartLogger, or NMS and
reset the insulation
impedance protection
threshold.
75