Alarm
ID
Alarm Name Alarm
Severity
Possible Cause Troubleshooting Suggestion
2037 Grid
Underfrequency
Major Cause ID = 1
Power grid
exception: The
actual grid
frequency is lower
than the
requirement of the
local power grid
standard.
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.
2038 Unstable Grid
Frequency
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
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.
2039 Output
Overcurrent
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.
1. The inverter monitors its
external working conditions in
real time. The inverter
automatically recovers after the
fault is rectied.
2. If the alarm occurs frequently
and aects 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.
SUN2000-(8KTL-20KTL)-M2
User Manual 8 Maintenance
Issue 11 (2023-02-07) Copyright © Huawei Technologies Co., Ltd. 99
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