SUN2000-(55KTL, 60KTL) Series
User Manual
8 System Maintenance
Issue 02 (2017-07-30)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
95
Alarm ID Alarm
Name
Alarm
Severity
Possible Cause
Suggestion
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.
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.
202
Abnormal
Invert
Circuit
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
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.