Huawei SUN2000-15KTL-50KTL-M3 Series User Manual page 29

Replacing SUN2000-(15KTL-50KTL) Series with
SUN2000-(15KTL-50KTL)-M3 Series
User Manual
ID Name
301 Abnormal
grid
voltage
Issue 01 (2021-04-05)
Severity Cause
 Cause ID = 14
The power grid voltage
drops dramatically or the
power grid is
short-circuited. As a result,
the inverter transient output
current exceeds the upper
threshold, and protection is
triggered.

Cause ID = 16
The DC component in the
power grid current exceeds
the upper threshold.

Cause ID = 20
The inverter output is
short-circuited. As a result,
the output current surges to
a value above the upper
threshold, and the inverter
protection is triggered.
Major The power grid voltage is
outside the acceptable range.
The possible causes are as
follows:
 Cause ID = 4
The power grid voltage is
below the lower threshold.
 Cause ID = 16
The power grid voltage
exceeds the upper
threshold.
 Cause ID = 19
The power grid voltage has
exceeded the upper
threshold for 10 minutes.
 Cause ID = 26
The power grid voltage
exceeds the upper
threshold.

Cause ID = 28
The three phases of the
power grid differ greatly in
voltage.

Cause ID = 29
1. Power grid outage
occurs.
2. The AC circuit is
Copyright © Huawei Technologies Co., Ltd.
Solution
2. If the alarm persists, contact
Huawei technical support.
 Cause ID = 4
1. If the alarm occurs
occasionally, the power grid
may be abnormal temporarily.
The inverter automatically
recovers after detecting that
the power grid becomes
normal.
2. If the alarm persists, check
whether the power grid
voltage is within the
acceptable range. If not,
contact the local power
operator. If yes, log in to the
app, SmartLogger, or NMS to
change the power grid
overvoltage and undervoltage
protection thresholds with the
consent of the local power
operator.
3. If the alarm persists for a long
time, check the AC circuit
breaker and AC output power
cable.

Cause ID = 16/19/26
1. If the voltage at the grid
connection point is too high,
contact the local power
operator.
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