Huawei SUN2000-55KTL Series User Manual page 106

SUN2000-(55KTL, 60KTL) Series
User Manual
Alarm ID Alarm
Name
Issue 06 (2020-01-03)
Alarm Possible Cause
Severity
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
The impedance of the
output phase wire B to the
PE cable is low or
short-circuited.
 Cause ID = 33
The impedance of the
output phase wire C to the
PE cable is low or
short-circuited.
Copyright © Huawei Technologies Co., Ltd.
8 System Maintenance
Suggestion
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
automatically recovers after the
fault is rectified.
2. If the alarm persists and affects
the energy yield of the power
station, contact the local power
operator.
Cause ID = 29
1. Check the AC voltage.
2. Check that the AC power cable is
connected and that the AC switch
is ON.
Cause ID = 31
Check the impedance of output phase
wire A to the PE cable, locate the
position with lower impedance, and
resolve the issue.
Cause ID = 32
Check the impedance of output phase
wire B to the PE cable, locate the
position with lower impedance, and
resolve the issue.
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