SUN2000-(2KTL-5KTL)-L0
User Manual
Copyright © Huawei Technologies Co., Ltd.
Cause ID = 1
The protective earthing
(PE) cable for the
SUN2000 is not
connected.
The voltage between the
SUN2000 neutral wire
and ground exceeds the
upper threshold.
1. Check that the PE cable for the
SUN2000 is connected properly.
2. If the SUN2000 is connected to
the TN power grid, check
whether the voltage of the neutral
wire to ground is normal.
3. Check whether the output is
connected to an isolation
transformer. If so, set
Grounding inspection to
Disable.
Low
Insulation
Resistance
Cause ID = 1
The PV string is
short-circuited to PE.
The PV string is
installed in a moist
environment for a long
time.
1. Check the impedance between
the PV array output and PE, and
eliminate short circuits and poor
insulation points.
2. Check that the SUN2000 PE
cable 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.
Cause ID = 1
The SUN2000 is
installed in a place with
poor ventilation.
The ambient
temperature exceeds the
upper threshold.
The SUN2000 is not
working properly.
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.
If the ventilation and ambient
temperature both meet
requirements, contact your
dealer.
Cause ID = 1–12
An unrecoverable fault
occurs on a circuit inside
the SUN2000.
Turn off the AC output switch and
DC input switch, and then turn them
on after 5 minutes. If the fault
persists, contact your dealer.
Note: If the cause ID is ID 1,
perform the preceding operation
when the PV string current is less
than 1 A.
Upgrade
Failed or
Software
Version
Unmatch
Cause ID = 1-4
The upgrade does not end
normally.
1. Perform an upgrade again.
2. If the upgrade fails several times,
contact your dealer.
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