Alarm
ID
Alarm
Name
Alarm
Severity
Cause Measures
2040 Output
DC
Compo
nent
Overhi
gh
Major Cause ID = 1
The DC component of the
SUN2000 output current exceeds
the specied upper threshold.
1. If the exception is caused
by an external fault, the
SUN2000 automatically
recovers after the fault is
rectied.
2. If the alarm occurs
frequently and aects the
power production of the PV
plant, contact Huawei
technical support.
2051 Abnor
mal
Residua
l
Current
Major Cause ID = 1
The insulation impedance of the
input side to PE decreases when
the SUN2000 is operating.
1. If the alarm occurs
accidentally, the external
power cable may be
abnormal temporarily. The
SUN2000 automatically
recovers after the fault is
rectied.
2. If the alarm occurs
frequently or persists,
check that the impedance
between the PV string and
ground is not below the
lower threshold.
2061 Abnor
mal
Ground
ing
Major 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.
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.
2062 Low
Insulati
on
Resista
nce
Major 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.
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.
SUN2000-(70KTL, 75KTL)-C1
User Manual 8 Maintenance
Issue 09 (2020-10-12) Copyright © Huawei Technologies Co., Ltd. 102
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