Huawei SUN2000 Series User Manual page 88

SUN2000-(8KTL-20KTL)-M2
User Manual
Alarm Alarm Name
ID
2037 Grid
Underfrequency
2038 Unstable Grid
Frequency
2039 Output
Overcurrent
Issue 01 (2020-07-02)
Alarm Possible Cause
Severity
Major Cause ID = 1
Power grid
exception: The
actual grid
frequency is lower
than the
requirement of the
local power grid
standard.
Major Cause ID = 1
Power grid
exception: The
actual grid
frequency change
rate does not
comply with the
local power grid
standard.
Major Cause ID = 1
The grid voltage
drops dramatically
or the power grid is
short-circuited. As a
result, the inverter
transient output
current exceeds the
upper threshold,
and inverter
protection is
triggered.
Copyright © Huawei Technologies Co., Ltd.
Troubleshooting Suggestion
1. If the alarm occurs accidentally,
the power grid may be
abnormal temporarily. The
inverter 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.
1. If the alarm occurs accidentally,
the power grid may be
abnormal temporarily. The
inverter 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.
1. The inverter monitors its
external working conditions in
real time. The inverter
automatically recovers after the
fault is rectified.
2. If the alarm occurs frequently
and affects the power
production of the PV plant,
check whether the output is
short-circuited. If the fault
persists, contact your dealer or
Huawei technical support.
8 Maintenance
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