Huawei SUN2000-50KTL-M0 User Manual page 104

SUN2000-(50KTL-M0, 70KTL-INM0)
User Manual (India Edition)
Alarm Alarm Alarm
ID Name Severity
2051 Abnorm Major
al
Residual
Current
2061 Abnorm Major
al
Groundi
ng
2062 Low Major
Insulatio
n
Resistan
ce
2063 Cabinet Major
Overtem
perature
Issue 03 (2019-07-30)
Cause
Cause ID = 1
The insulation impedance of the input
side to PE decreases when the
SUN2000 is operating.
Cause ID = 1
1. The PE cable for the SUN2000 is
not connected.
2. The SUN2000 output side does not
connect to an isolation transformer
when the PV string output is
grounded.
Cause ID = 1
1. The PV string is short-circuited to
PE.
2. The PV string has been in a moist
environment for a long time and the
power cable is not well insulated to
ground.
Cause ID = 1
1. The SUN2000 is installed in a place
with poor ventilation.
2. The ambient temperature exceeds
the upper threshold.
3. The SUN2000 is not working
properly.
Copyright © Huawei Technologies Co., Ltd.
8 Maintenance
Measures
1. If the alarm occurs
accidentally, the external
power cable may be abnormal
temporarily. The SUN2000
automatically recovers after the
fault is rectified.
2. If the alarm occurs frequently
or persists, check that the
impedance between the PV
string and ground is not below
the lower threshold.
1. Check that the PE cable for the
SUN2000 is connected
properly.
2. If the PV string output is
grounded, check that the
SUN2000 output side connects
to an isolation transformer.
1. Check the impedance between
the PV string and the PE cable.
If a short circuit occurs, rectify
the fault.
2. Check that the PE cable for 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, reset
Insulation resistance
protection.
1. Check the ventilation and
ambient temperature at the
SUN2000 installation position.
If the ventilation is poor or the
ambient temperature exceeds
the upper threshold, improve
the ventilation and heat
dissipation.
2. If the ventilation and ambient
temperature both meet
requirements, contact Huawei
technical support.
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