Huawei SUN2000-55KTL Series User Manual page 105

SUN2000-(55KTL, 60KTL) Series
User Manual
Alarm ID Alarm
Name
202 Abnormal
Invert
Circuit
301 Abnormal
Grid
Voltage
Issue 06 (2020-01-03)
Alarm Possible Cause
Severity
Major Abnormal external conditions
trigger the protection for the
inverter circuit inside the
inverter. The possible causes
are as follows:
 Cause ID = 13
The power grid voltage
drops dramatically or the
power grid is
short-circuited, which
damages the internal
voltage detection circuit in
the inverter.
 Cause ID = 14
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.
 Cause ID = 16
The DC current in the
power grid exceeds the
upper threshold.
 Cause ID = 20
The inverter output is
short-circuited. As a result,
the output current surges to
a value above the upper
limit, and the inverter
protection is triggered.
Major The power grid voltage is
beyond the acceptable range.
The possible causes are as
follows:
 Cause ID = 4
The power grid voltage is
below the specified lower
threshold.
 Cause ID = 16
The power grid voltage
exceeds the specified upper
threshold.
 Cause ID = 19
Copyright © Huawei Technologies Co., Ltd.
8 System Maintenance
Suggestion
Cause ID = 13/14/16
1. The inverter detects its external
working conditions in real time.
After the fault is rectified, the
inverter automatically recovers.
2. If the alarm persists, contact
Huawei technical support.
Cause ID = 20
1. Check the inverter output cable
for short-circuits.
2. If the alarm persists, contact
Huawei technical support.
Cause ID = 4
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 power grid
voltage is within the acceptable
range. If no, contact the local
power operator. If yes, log in to
the SUN2000 APP, SmartLogger,
or the NetEco to modify the
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