Huawei SUN2000-2KTL-L1 User Manual page 93

SUN2000-(2KTL-6KTL)-L1
User Manual
Alarm ID Alarm
Name
2040 Output
DC
Compon
ent
Overhig
h
2051 Abnorm
al
Residual
Current
2062 Low
Insulatio
n
Resistan
ce
Issue 03 (2020-07-20)
Alarm Possible Causes
Severity
Major Cause ID = 1
The DC component of the
SUN2000 output current
exceeds the specified upper
threshold.
Major Cause ID = 1
The insulation impedance
of the input side to PE
decreases when the
SUN2000 is operating.
Major Cause ID = 1
● A short circuit occurs
between the PV array
and the ground.
● The ambient air of the
PV array is damp and
the insulation between
the PV array and the
ground is poor.
Copyright © Huawei Technologies Co., Ltd.
8 System Maintenance
Troubleshooting
1. The SUN2000 detects its
external working conditions
in real time. After the fault is
rectified, the SUN2000
automatically recovers.
2. If the alarm occurs frequently,
contact your dealer or
Huawei technical support.
1. If the alarm occurs
occasionally, the external
circuit may be abnormal
temporarily. The SUN2000
automatically recovers after
the fault is rectified.
2. If the alarm occurs frequently
or persists, check whether the
impedance between the PV
string and the ground is too
low.
1. Check the output impedance
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 the impedance is lower
than the specified protection
threshold in rainy and cloudy
days, set Insulation
resistance protection using
the mobile app, SmartLogger,
or NMS.
Current insulation resistance:
x MΩ, possible short circuit
position: x%. The short circuit
position is valid for a single
PV string. If there are
multiple PV strings, check the
PV strings one by one. For
details, see E Locating
Insulation Resistance Faults.
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