Alarm ID Alarm
Name
Alarm
Severity
Possible Cause Troubleshooting Suggestion
2061 Abnorma
l
Groundin
g
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.
Power o the inverter (turn o
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.
2062
Low
Insulatio
n
Resistanc
e
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.
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.
SUN2000-(3KTL-10KTL)-M0
User Manual 7 Maintenance
Issue 06 (2020-10-23) Copyright © Huawei Technologies Co., Ltd. 75