Huawei SUN2000 M5 Series User Manual page 76

SUN2000-(12KTL-25KTL)-M5 Series
User Manual
Alarm Alarm
ID Name
2035 Grid volt.
Imbalanc
e
2036 Grid
overfrequ
ency
2037 Grid
underfreq
uency
Issue 03 (2023-02-15)
Alarm Possible Causes
Severity
Major Cause ID = 1
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.
Copyright © Huawei Digital Power Technologies Co., Ltd.
Troubleshooting
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.
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.
8 Maintenance
70