Huawei SUN2000L Series User Manual page 126

SUN2000L-(4.125KTL, 4.95KTL)-JP
User Manual
Alarm
Alarm ID
Name
2032 Grid
Failure
2033 Grid
Undervolt
age
2034 Grid
Overvolta
ge
2035 Unbalance
d Grid
Voltage
Issue 03 (2018-04-11)
Alarm
Possible Cause
Severity
Major Cause ID = 1
 The power grid experiences
an outage.

The AC circuit is
disconnected or AC switch
is off.
Major Cause ID = 1
The 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 grid voltage exceeds the
higher threshold or the high
voltage duration has lasted for
more than the value specified
by HVRT.
Major The difference between grid
phase voltages exceeds the
upper threshold.
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8 System Maintenance
Suggestion
1. Check the AC voltage.
2. Check that the AC power cable is
connected and that the AC switch
is ON.
1. If the alarm occurs accidentally,
the power grid may be abnormal
temporarily. The SUN2000L
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, modify the 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.
1. Check whether the grid
connection voltage exceeds the
upper threshold. If yes, contact
the local power operator.
2. If you have confirmed that the
grid connection 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 grid
voltage exceeds the upper
threshold.
1. Check that the grid voltage is
within the normal range.
2. Check the connection of the AC
output power cable.
3. If the cable connection is proper
but the alarm occurs frequently
and affects the power production
of the PV plant, contact the local
power operator.
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