Huawei SUN2000L2KTL User Manual page 85

SUN2000L-(2KTL-5KTL)
User Manual
Alarm Alarm Name
ID
2051 Abnormal
Residual Current
2061 Abnormal
Grounding
2062 Low Insulation
Resistance
2063 Overtemperature
Issue 05 (2019-06-06)
Alarm Possible Cause
Severity
Major Cause ID = 1
The insulation impedance of
the input side to PE
decreases when the
SUN2000L is operating.
Major Cause ID = 1
 The PE cable for the
SUN2000L is not
connected.

The voltage between the
SUN2000L neutral wire
and ground exceeds the
upper threshold.
Major Cause ID = 1
 The PV string is
short-circuited to PE.
 The PV string is installed
in a moist environment
for a long time.
Major Cause ID = 1
 The SUN2000L is
installed in a place with
poor ventilation.

The ambient temperature
exceeds the upper
threshold.
 The SUN2000L is not
working properly.
Copyright © Huawei Technologies Co., Ltd.
7 System Maintenance
Suggestion
1. If the alarm occurs
accidentally, the external
power cable may be abnormal
temporarily. The SUN2000L
automatically recovers after
the fault is rectified.
2. If the alarm occurs frequently
or persists, check whether the
impedance between the PV
string and ground is below the
lower threshold.
1. Check that the PE cable for the
SUN2000L is connected
properly.
2. Check that the voltage
between the SUN2000L
neutral wire and ground is
within the normal range. If an
isolation transformer is
connected, set OFF due to
abnormal grounding to
Disable.
1. Check the impedance between
the PV array output and PE,
and eliminate short circuits
and poor insulation points.
2. Check that the SUN2000L PE
cable is correctly connected.
3. If you confirm that the
impedance is less than the
default value in a cloudy or
rainy environment, reset
Insulation resistance
protection.

Check the ventilation and
ambient temperature at the
SUN2000L installation
position.
 If the ventilation is poor or the
ambient temperature exceeds
the upper threshold, improve
the ventilation and heat
dissipation.
 If both the ventilation and
ambient temperature meet
requirements, contact your
supplier or Huawei technical
support.
79