Huawei SUN2000-15KTL-50KTL-M3 Series User Manual page 36

Replacing SUN2000-(15KTL-50KTL) Series with
SUN2000-(15KTL-50KTL)-M3 Series
User Manual
ID Name
e
Grid
2036
overfrequ
ency
2037 Grid
underfreq
uency
2038 Unstable
grid
Issue 01 (2021-04-05)
Severity Cause
The difference between power
grid phase voltages exceeds the
upper threshold.
Major Cause ID = 1
Power grid exception: The
actual power grid frequency is
higher than the requirements
for the local power grid code.
Major Cause ID = 1
Power grid exception: The
actual power grid frequency is
lower than the requirements for
the local power grid code.
Major Cause ID = 1
Power grid exception: The
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Solution
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.
3. If the alarm lasts for a long time,
check the AC output power cable
connection.
4. If the AC output power cable is
correctly connected, yet the alarm
persists and affects the energy
yield of the PV plant, contact the
local power operator.
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 frequency
is within the acceptable range. If
not, contact the local power
operator. If yes, modify the grid
overfrequency protection
threshold through the app,
SmartLogger, or NMS with the
consent of the local power
operator.
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 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.
1. If the alarm occurs occasionally,
the power grid may be abnormal
9 Maintenance
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