Huawei SUN2000-330KTL-H2 - Protection

Alar
m ID
Alarm
Name
Alarm
Severity
Possible Cause Suggestion
2039 AC
Overcurr
ent
Major Cause ID = 1
The grid experiences a
dramatic voltage drop or is
short-circuited. As a result,
the transient AC current of
the device exceeds the
upper threshold and
triggers protection.
1. The device detects its external
working conditions in real time.
After the fault is rectied, the
device automatically recovers.
2. If the alarm occurs frequently and
aects the operation of the power
plant, check whether AC short
circuit exists. If the fault persists,
contact your dealer or technical
support.
2040 DC
Compon
ent
Overhig
h
Major Cause ID = 1
The DC component in the
AC current exceeds the
upper threshold.
1. The device detects its external
working conditions in real time.
After the fault is rectied, the
device automatically recovers.
2. If the alarm occurs frequently,
contact your dealer or technical
support.
2051 Abnorm
al
Residual
Current
Major Cause ID = 1
The ground insulation
resistance decreases during
device operation.
1. If the alarm occurs occasionally,
the external circuit may be
abnormal temporarily. The device
will automatically recover after the
fault is rectied.
2. If the alarm occurs frequently or
persists, check whether the DC-to-
ground impedance is too low.
2062 Low
Insulatio
n
Resistan
ce
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.
1. Set Insulation resistance
protection to the minimum value
and restart the inverter.
2. Check that the PE cable of the
device is correctly connected.
3. Check the output impedance of
the PV array to ground. If there is
a short circuit or lack of insulation,
rectify it.
SUN2000-(250KTL, 280KTL, 300KTL, 330KTL) Series
User Manual 9 Alarm Reference
Issue 07 (2023-06-30) Copyright © Huawei Technologies Co., Ltd. 93