Huawei SUN2000 Series User Manual page 65

Alarm ID Alarm
Name
2061 Abnormal
Grounding
2062 Low
Insulation
Resistance
2063 Overtempe
rature
Device
2064
Fault
Issue 02 (2019-04-30)
Alarm Possible Cause
Severity
Major  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  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.
Major  The SUN2000 is installed
in a place with poor
ventilation.

The ambient temperature is
too high.
 The SUN2000 is not
working properly.
An unrecoverable fault has
Major
occurred on a circuit inside the
SUN2000.
Copyright © Huawei Technologies Co., Ltd.
SUN2000-(3KTL-10KTL)
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.
User Manual
Page 65 of 81