Alarm
ID
Alarm
Name
Alarm
Severit
y
Possible Causes Suggestions
2036 Grid
Overfre
quency
Major Cause ID = 1
Power grid exception: The actual
power grid frequency is higher
than the standard requirement for
the local power grid.
1. If the alarm occurs
occasionally, the power
grid may be abnormal
temporarily. The solar
inverter automatically
recovers after detecting
that the power grid
becomes normal.
2. If the alarm occurs
frequently, check whether
the power grid frequency is
within the acceptable
range. If not, contact the
local power operator. If yes,
log in to the mobile phone
app, SmartLogger, or NMS
to modify the power grid
overfrequency protection
threshold with the consent
of the local power
operator.
2037
Grid
Underfr
equency
Major Cause ID = 1
Power grid exception: The actual
power grid frequency is lower
than the standard requirement for
the local power grid.
1. If the alarm occurs
occasionally, the power
grid may be abnormal
temporarily. The solar
inverter automatically
recovers after detecting
that the power grid
becomes normal.
2. If the alarm occurs
frequently, check whether
the power grid frequency is
within the acceptable
range. If not, contact the
local power operator. If yes,
log in to the mobile phone
app, SmartLogger, or NMS
to modify the power grid
underfrequency protection
threshold with the consent
of the local power
operator.
SUN2000-(100KTL, 110KTL, 125KTL) Series
User Manual 8 Maintenance
Issue 07 (2020-09-15) Copyright © Huawei Technologies Co., Ltd. 114