Huawei SUN2000-55KTL Series User Manual page 104

SUN2000-(55KTL, 60KTL) Series
User Manual
Alarm ID Alarm
Name
200 Abnormal
DC
Circuit
Issue 06 (2020-01-03)
Alarm Possible Cause
Severity
Major Abnormal external conditions
trigger the protection for the
DC circuit inside the inverter.
The possible causes are as
follows:
 Cause ID = 3
The inverter input is
disconnected accidentally,
or the PV string output
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.
Copyright © Huawei Technologies Co., Ltd.
8 System Maintenance
Suggestion
Cause ID = 3/10/11
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 = 12/15
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.
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