Huawei SUN2000-4.95KTL-JPL1 User Manual page 88

SUN2000-4.95KTL-JPL1
User Manual
Alarm Alarm Name
ID
2062 Low Insulation
Resistance
2063 Overtemperatu
re
Issue 05 (2023-02-17)
Alarm Possible Causes
Severity
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.
Minor Cause ID = 1
● The SUN2000 is installed
in a place with poor
ventilation.
● The ambient
temperature is higher
than the upper
threshold.
● The SUN2000 is not
working properly.
Copyright © Huawei Technologies Co., Ltd.
8 Maintenance
Troubleshooting
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.
4. 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 Locating
Insulation Resistance
Faults.
1. Check the ventilation
and ambient
temperature of the
SUN2000 installation
position.
2. If the ventilation is poor
or the ambient
temperature exceeds the
upper threshold,
improve the ventilation
and heat dissipation.
3. If the ventilation and
ambient temperature
both meet requirements,
contact your dealer or
Huawei technical
support.
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