Huawei SUN2000 M5 Series User Manual page 75

SUN2000-(12KTL-25KTL)-M5 Series
User Manual
Alarm Alarm
ID Name
2033 Grid
undervolt
age
2034 Grid
overvolta
ge
Issue 03 (2023-02-15)
Alarm Possible Causes
Severity
Major Cause ID = 1
The power grid
voltage is below
the lower threshold
or the low-voltage
duration has lasted
for more than the
value specified by
LVRT.
Major Cause ID = 1
The power grid
voltage exceeds the
upper threshold or
the high voltage
duration has lasted
for more than the
value specified by
HVRT.
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. If yes, modify
the grid undervoltage protection
threshold through the app,
SmartLogger, or NMS 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.
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.
3. Check whether the peak voltage of
the power grid is too high. If the
alarm persists and lasts for a long
time, contact the local power
operator.
8 Maintenance
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