Huawei SUN2000 Series User Manual page 63

Alarm ID Alarm
Name
2035 Unbalance
d Grid
Voltage
Grid
2036
Overfrequ
ency
2037 Grid
Underfreq
uency
Issue 02 (2019-04-30)
Alarm Possible Cause
Severity
Major The difference between grid
phase voltages exceeds the
upper threshold.
Power grid exception: The
Major
actual power grid frequency is
higher than the standard
requirement for the local
power grid.
Major Power grid exception: The
actual power grid frequency is
lower than the standard
requirement for the local
power grid.
Copyright © Huawei Technologies Co., Ltd.
SUN2000-(3KTL-10KTL)
Troubleshooting Suggestion
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.
3. If the fault persists for a long
time, check the connection
between the AC switch and the
output power cable.
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 frequency
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
overfrequency protection
threshold with the consent of the
local power operator.
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 frequency
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
underfrequency protection
threshold with the consent of the
local power operator.
User Manual
Page 63 of 81