Huawei SUN2000-55KTL-HV-D1 User Manual page 101

SUN2000-(55KTL, 60KTL) Series
User Manual
Alarm ID Alarm
Name
202 Abnormal
Invert
Circuit
Issue 02 (2017-07-30)
Alarm Possible Cause
Severity
power changes sharply
because the PV string is
shielded from sunlight.
 Cause ID = 10
The three phases of the
power grid are seriously
unbalanced, which triggers
the protection for the
internal control circuit of
the inverter.
 Cause ID = 11
The power grid voltage
changes sharply and the
inverter input power fails to
discharge in a short time,
which increases the internal
voltage and triggers
overvoltage protection.

Cause ID = 12/15
An unrecoverable fault
occurs on a circuit inside
the inverter.
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
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Copyright © Huawei Technologies Co., Ltd.
8 System Maintenance
Suggestion
Turn off the AC output switch and
DC input switch. Then turn on the
AC output switch and DC input
switch after 5 minutes. If the fault
persists, contact Huawei technical
support.
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.
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