Huawei SUN2000-55KTL-HV-D1 User Manual page 102

SUN2000-(55KTL, 60KTL) Series
User Manual
Alarm ID Alarm
Name
301 Abnormal
Grid
Voltage
Issue 02 (2017-07-30)
Alarm Possible Cause
Severity
upper threshold.

Cause ID = 20
The inverter output is
short-circuited. As a result,
the output current surges to
a value above the upper
limit, and the inverter
protection is triggered.
Major The power grid voltage is
beyond the acceptable range.
The possible causes are as
follows:

Cause ID = 4
The power grid voltage is
below the specified lower
threshold.
 Cause ID = 16
The power grid voltage
exceeds the specified upper
threshold.
 Cause ID = 19
The power grid voltage has
exceeded the specified
upper threshold for 10
minutes.
 Cause ID = 26
The power grid voltage
exceeds the specified upper
threshold.
 Cause ID = 28
The three phases of the
power grid differ greatly in
voltage.
 Cause ID = 29
1. The power grid
experiences an outage.
2. The AC circuit is
disconnected or AC
switch is off.
 Cause ID = 31
The impedance of the
output phase wire A to the
PE cable is low or
short-circuited.
 Cause ID = 32
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8 System Maintenance
Suggestion
Cause ID = 4
1. If the alarm occurs accidentally,
the power grid may be abnormal
temporarily. The inverter
automatically recovers after
detecting that the power grid
becomes normal.
2. If the alarm occurs frequently,
check whether the power grid
voltage is within the acceptable
range. If no, contact the local
power operator. If yes, log in to
the SUN2000 APP, SmartLogger,
or the NetEco to modify the
power grid overvoltage and
undervoltage protection
thresholds with the consent of the
local power operator.
3. If the fault persists for a long
time, check the connection
between the AC switch and the
output power cable.
Cause ID = 16/19/26
1. Check whether the grid-tied
voltage exceeds the upper
threshold. If yes, contact the local
power operator.
2. If you have confirmed that the
grid-tied voltage exceeds the
upper threshold and obtained the
consent of the local power
operator, modify the overvoltage
and undervoltage protection
thresholds.
3. Check whether the peak power
grid voltage exceeds the upper
threshold.
Cause ID = 28
1. If the exception is caused by an
external fault, the inverter
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