Huawei SUN2000-70KTL-C1 - Page 109

Alarm
ID
Alarm
Name
Alarm
Severity
Cause Measures
2037 Grid
Underfr
equenc
y
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
accidentally, 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, modify the
power grid underfrequency
protection threshold with
the consent of the local
power operator.
2038 Unstabl
e Grid
Freque
ncy
Major Cause ID = 1
Power grid exception: The actual
grid frequency change rate does
not comply with the local power
grid standard.
1. If the alarm occurs
accidentally, 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.
2039 Output
Overcu
rrent
Major Cause ID = 1
The power grid voltage drops
dramatically or the power grid is
short-circuited. As a result, the
inverter transient output current
exceeds the upper threshold and
therefore the inverter protection is
triggered.
1. The inverter detects its
external working conditions
in real time. After the fault
is rectied, the inverter
automatically recovers.
2. If the alarm occurs
frequently and
aects the
power production of the PV
plant, check whether the
output is short-circuited. If
the fault persists, contact
Huawei technical support.
SUN2000-(70KTL, 75KTL)-C1
User Manual 8 Maintenance
Issue 09 (2020-10-12) Copyright © Huawei Technologies Co., Ltd. 101