Huawei SUN2000-3KTL-M0 User Manual page 60

SUN2000-(3KTL-12KTL)-M0
User Manual
Alar Alarm Name
m ID
2039 Output
Overcurrent
Output DC
2040
Component
Overhigh
2051 Abnormal
Residual Current
2061 Abnormal
Grounding
Issue 01 (2018-12-30)
Alarm Possible Cause
Severity
Major 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.
The DC component of the
Major
SUN2000 output current
exceeds the specified upper
threshold.
Major The insulation impedance of
the input side to PE decreases
when the SUN2000 is
operating.

Major 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.
Copyright © Huawei Technologies Co., Ltd.
7 Maintenance
Troubleshooting Suggestion
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.
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.
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.
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
Disablethrough the mobile
phone app, SmartLogger, or
NMS.
54