Huawei SUN2000 MB0 Series User Manual page 98

SUN2000-(12K-25K)-MB0 Series
User Manual
Alar
m ID
2037
2038
2039
Issue 01 (2023-04-30)
Alarm Alarm
Name Severity
Grid Major
underfr
equenc
y
Unstabl Major
e grid
frequen
cy
AC Major
Overcur
rent
Copyright © Huawei Digital Power Technologies Co., Ltd.
Possible Troubleshooting
Causes
Cause ID = 1 1. If the alarm occurs
Power grid
exception: The
actual power
grid frequency
is lower than
the
requirements 2. If the alarm persists, check
for the local
power grid
code.
Cause ID = 1 1. If the alarm occurs
Power grid
exception: The
actual change
rate of the
power grid
frequency does
not meet the 2. If the alarm persists, check
requirements
for the local
power grid
code.
Cause ID = 1 1. The inverter monitors its
The power grid
voltage drops
dramatically or
the power grid
is short- 2. If the alarm persists and
circuited. As a
result, the
inverter
transient
output current
exceeds the
upper
threshold, and
protection is
triggered.
7 System Maintenance
occasionally, the power grid
may be abnormal temporarily.
The inverter automatically
recovers after detecting that
the power grid becomes
normal.
whether the power grid
frequency is within the
acceptable range. If not,
contact the local power
operator. If yes, modify the
grid underfrequency
protection threshold through
the app, SmartLogger, or
NMS with the consent of the
local power operator.
occasionally, the power grid
may be abnormal temporarily.
The inverter automatically
recovers after detecting that
the power grid becomes
normal.
whether the power grid
frequency is within the
acceptable range. If not,
contact the local power
operator.
external operating conditions
in real time and automatically
recovers after the fault is
rectified.
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.
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