Huawei SUN2000-M0 Series User Manual page 71

SUN2000-(5KTL, 6KTL)-M0
User Manual
Alarm ID Alarm
Name
2061 Abnormal
Grounding
2062 Low
Insulation
Resistance
2063 Overtemp
erature
2064 Device
Fault
Issue 03 (2019-07-19)
Alarm Possible Cause
Severity
Major Cause ID = 1

The N cable or ground
cable is not connected.
 When a PV array is
grounded, the inverter
output is not connected to
an isolation transformer.
Major Cause ID = 1

PV arrays are short-
circuited with PE.
 The ambient air of the PV
array is damp and the
insulation between the PV
array and the ground is
poor.
Minor Cause ID = 1
 The SUN2000 is installed
in a place with poor
ventilation.
 The ambient temperature
is too high.
 The SUN2000 is not
working properly.
Major Cause ID = 1–12
An unrecoverable fault has
occurred on a circuit inside
the SUN2000.
Copyright © Huawei Technologies Co., Ltd.
Troubleshooting Suggestion
Power off the inverter and check the
following items:
1. Check whether the PE cable of
the SUN2000 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 of the N cable to ground
is normal.
3. Check whether the output is
connected to an isolation
transformer. If yes, set
Grounding inspection to
Disable through the mobile
phone app, SmartLogger, or
NMS.
1. Check the output resistance of
the PV array to ground. If there
is a short circuit or lack of
insulation, rectify it.
2. Check that the PE cable of the
SUN2000 is correctly connected.
3. If you are sure that the
impedance is less than the
default value in a cloudy or rainy
environment, log in to the
mobile phone app, SmartLogger,
or NMS and reset the insulation
impedance protection threshold.
 Check the ventilation and
ambient temperature of the
SUN2000 installation position.
 If the ventilation is poor or the
ambient temperature exceeds the
upper threshold, improve the
ventilation and heat dissipation.

If the ventilation and ambient
temperature both meet
requirements, contact your
dealer or Huawei technical
support.
Turn off the AC output switch and
DC input switch, and then turn them
on after 5 minutes. If the fault
persists, contact your dealer or
Huawei technical support.
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