Alarm
ID
Alarm
Name
Alarm
Severit
y
Possible Causes
Suggestions
2038
Unstable
Grid
Frequen
cy
Major
Cause ID = 1
Power grid exception: The actual
grid frequency change rate does
not comply with the local power
grid standard.
1. If the alarm occurs
occasionally, the power grid
may be abnormal temporarily.
The solar inverter
automatically recovers after
detecting that the power grid
becomes normal.
2. If the alarm occurs
frequently, check whether the
grid frequency is within the
acceptable range. If not,
contact the local power
operator.
2039
Output
Overcurr
ent
Major
Cause ID = 1
The power grid voltage drops
dramatically or the power grid is
short-circuited. As a result, the
solar inverter transient output
current exceeds the upper
threshold and therefore the solar
inverter protection is triggered.
1. The solar inverter detects
its external working
conditions in real time.
After the fault is rectified,
the solar inverter
automatically recovers.
2. If the alarm occurs
frequently and affects the
energy yield of the PV
plant, check whether the
output is short-circuited. If
the fault cannot be
rectified, contact your
dealer or Huawei technical
support.
2040
Output
DC
Compon
ent
Overhig
h
Major
Cause ID = 1
The DC component of the solar
inverter output current exceeds
the specified upper threshold.
1. If the exception is caused
by an external fault, the
solar inverter automatically
recovers after the fault is
rectified.
2. If the alarm occurs
frequently, contact your
dealer or Huawei technical
support.
SUN2000-(75KTL, 100KTL, 110KTL, 125KTL) Series
User Manual
8 Maintenance
Issue 11 (2021-11-10)
Copyright © Huawei Technologies Co., Ltd.
117