Huawei SUN2000-8KTL-M0 User Manual page 70

SUN2000-(12KTL, 15KTL, 17KTL, 20KTL)-M0
User Manual
Alarm ID Alarm
Name
2031 Power grid
phase wire
short-circu
it to PE
2032 Grid
Failure
2033 Grid
Undervolt
age
Issue 03 (2019-07-19)
Alarm Possible Cause
Severity
Major Cause ID = 1
The impedance of the output
phase wire is low or
short-circuited to PE.
Major Cause ID = 1

The power grid experiences
an outage.
 The AC circuit is
disconnected or the AC
switch is off.
Major Cause ID = 1
The power grid voltage is
below the lower threshold or
the undervoltage duration
exceeds the value specified by
LVRT.
Copyright © Huawei Technologies Co., Ltd.
Troubleshooting Suggestion
Check the impedance of the output
phase wire to PE, locate the position
with lower impedance and restore
that.
1. Check the AC voltage.
2. Check whether the AC circuit is
disconnected or whether the AC
switch is off.
1. If the alarm occurs occasionally,
the power grid may be abnormal
temporarily. The SUN2000
automatically recovers after
detecting that the power grid
becomes normal.
2. If the alarm occurs frequently,
check whether the grid voltage is
within the acceptable range. If no,
contact the local power operator.
If yes, log in to the mobile phone
app, SmartLogger, or NMS to
modify the grid undervoltage
protection threshold 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.
7 Maintenance
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