SUN2000-(12KTL, 15KTL, 17KTL, 20KTL)-M0
User Manual
Copyright © Huawei Technologies Co., Ltd.
Troubleshooting Suggestion
Low
Insulation
Resistance
Cause ID = 1
PV arrays are
short-circuited with PE.
The ambient air of the PV
array is damp and the
insulation between the PV
array and the ground is
poor.
1. Check the output resistance 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 you are sure that the impedance
is less than the default value in a
cloudy or rainy environment, log
in to the mobile phone app,
SmartLogger, or NMS and reset
the insulation impedance
protection threshold.
Cause ID = 1
The SUN2000 is installed
in a place with poor
ventilation.
The ambient temperature is
too high.
The SUN2000 is not
working properly.
Check the ventilation and
ambient temperature of 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
or Huawei technical support.
Cause ID = 1–12
An unrecoverable fault has
occurred 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 or
Huawei technical support.
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, 2 and 4
The upgrade does not end
normally.
NOTE
Upgrade the inverter again if it is
stuck in initialization state
without generating any alarms
and cannot be restored to the
normal state during the upgrade
when the PV inputs are
disconnected and reconnected
next time.
1. Perform the upgrade again.
2. If the upgrade fails several times,
contact your dealer or Huawei
technical support.
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