SUN2000-(12KTL, 15KTL, 17KTL, 20KTL)-M0
User Manual
Copyright © Huawei Technologies Co., Ltd.
Troubleshooting Suggestion
Cause ID = 1
The power grid voltage drops
dramatically or the power grid
is short-circuited. As a result,
the SUN2000 transient output
current exceeds the upper
threshold and therefore the
protection is triggered.
1. The SUN2000 detects its external
working conditions in real time.
After the fault is rectified, it
automatically recovers.
2. If the alarm occurs frequently and
affects the power production of
the PV plant, check whether the
output is short-circuited. If the
fault persists, contact your dealer
or Huawei technical support.
Output DC
Componen
t Overhigh
Cause ID = 1
The DC component of the
SUN2000 output current
exceeds the specified upper
threshold.
1. The SUN2000 detects its external
working conditions in real time.
After the fault is rectified, it
automatically recovers.
2. If the alarm occurs frequently,
contact your dealer or Huawei
technical support.
Abnormal
Residual
Current
Cause ID = 1
The insulation impedance of
the input side to PE decreases
when the SUN2000 is
operating.
1. If the alarm occurs occasionally,
the external power cable 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 of the PV string to
ground is excessively low.
Cause ID = 1
The N cable or ground
cable is not connected.
When a PV array is
grounded, the inverter
output is not connected to
an isolation transformer.
Power off the inverter and check the
following items:
1. Check whether the PE cable of
the SUN2000 is connected
properly.
2. If the inverter is connected to the
TN power grid, check whether
the N cable is properly connected
and whether the voltage of the N
cable to ground is normal.
3. Check whether the output is
connected to an isolation
transformer. If yes, set
Grounding inspection to
Disable through the mobile
phone app, SmartLogger, or
NMS.
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